Merge tag 'net-next-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski: "The sprinkling of SPI drivers is because we added a new one and Mark sent us a SPI driver interface conversion pull request. Core ---- - Introduce XDP multi-buffer support, allowing the use of XDP with jumbo frame MTUs and combination with Rx coalescing offloads (LRO). - Speed up netns dismantling (5x) and lower the memory cost a little. Remove unnecessary per-netns sockets. Scope some lists to a netns. Cut down RCU syncing. Use batch methods. Allow netdev registration to complete out of order. - Support distinguishing timestamp types (ingress vs egress) and maintaining them across packet scrubbing points (e.g. redirect). - Continue the work of annotating packet drop reasons throughout the stack. - Switch netdev error counters from an atomic to dynamically allocated per-CPU counters. - Rework a few preempt_disable(), local_irq_save() and busy waiting sections problematic on PREEMPT_RT. - Extend the ref_tracker to allow catching use-after-free bugs. BPF --- - Introduce "packing allocator" for BPF JIT images. JITed code is marked read only, and used to be allocated at page granularity. Custom allocator allows for more efficient memory use, lower iTLB pressure and prevents identity mapping huge pages from getting split. - Make use of BTF type annotations (e.g. __user, __percpu) to enforce the correct probe read access method, add appropriate helpers. - Convert the BPF preload to use light skeleton and drop the user-mode-driver dependency. - Allow XDP BPF_PROG_RUN test infra to send real packets, enabling its use as a packet generator. - Allow local storage memory to be allocated with GFP_KERNEL if called from a hook allowed to sleep. - Introduce fprobe (multi kprobe) to speed up mass attachment (arch bits to come later). - Add unstable conntrack lookup helpers for BPF by using the BPF kfunc infra. - Allow cgroup BPF progs to return custom errors to user space. - Add support for AF_UNIX iterator batching. - Allow iterator programs to use sleepable helpers. - Support JIT of add, and, or, xor and xchg atomic ops on arm64. - Add BTFGen support to bpftool which allows to use CO-RE in kernels without BTF info. - Large number of libbpf API improvements, cleanups and deprecations. Protocols --------- - Micro-optimize UDPv6 Tx, gaining up to 5% in test on dummy netdev. - Adjust TSO packet sizes based on min_rtt, allowing very low latency links (data centers) to always send full-sized TSO super-frames. - Make IPv6 flow label changes (AKA hash rethink) more configurable, via sysctl and setsockopt. Distinguish between server and client behavior. - VxLAN support to "collect metadata" devices to terminate only configured VNIs. This is similar to VLAN filtering in the bridge. - Support inserting IPv6 IOAM information to a fraction of frames. - Add protocol attribute to IP addresses to allow identifying where given address comes from (kernel-generated, DHCP etc.) - Support setting socket and IPv6 options via cmsg on ping6 sockets. - Reject mis-use of ECN bits in IP headers as part of DSCP/TOS. Define dscp_t and stop taking ECN bits into account in fib-rules. - Add support for locked bridge ports (for 802.1X). - tun: support NAPI for packets received from batched XDP buffs, doubling the performance in some scenarios. - IPv6 extension header handling in Open vSwitch. - Support IPv6 control message load balancing in bonding, prevent neighbor solicitation and advertisement from using the wrong port. Support NS/NA monitor selection similar to existing ARP monitor. - SMC - improve performance with TCP_CORK and sendfile() - support auto-corking - support TCP_NODELAY - MCTP (Management Component Transport Protocol) - add user space tag control interface - I2C binding driver (as specified by DMTF DSP0237) - Multi-BSSID beacon handling in AP mode for WiFi. - Bluetooth: - handle MSFT Monitor Device Event - add MGMT Adv Monitor Device Found/Lost events - Multi-Path TCP: - add support for the SO_SNDTIMEO socket option - lots of selftest cleanups and improvements - Increase the max PDU size in CAN ISOTP to 64 kB. Driver API ---------- - Add HW counters for SW netdevs, a mechanism for devices which offload packet forwarding to report packet statistics back to software interfaces such as tunnels. - Select the default NIC queue count as a fraction of number of physical CPU cores, instead of hard-coding to 8. - Expose devlink instance locks to drivers. Allow device layer of drivers to use that lock directly instead of creating their own which always runs into ordering issues in devlink callbacks. - Add header/data split indication to guide user space enabling of TCP zero-copy Rx. - Allow configuring completion queue event size. - Refactor page_pool to enable fragmenting after allocation. - Add allocation and page reuse statistics to page_pool. - Improve Multiple Spanning Trees support in the bridge to allow reuse of topologies across VLANs, saving HW resources in switches. - DSA (Distributed Switch Architecture): - replay and offload of host VLAN entries - offload of static and local FDB entries on LAG interfaces - FDB isolation and unicast filtering New hardware / drivers ---------------------- - Ethernet: - LAN937x T1 PHYs - Davicom DM9051 SPI NIC driver - Realtek RTL8367S, RTL8367RB-VB switch and MDIO - Microchip ksz8563 switches - Netronome NFP3800 SmartNICs - Fungible SmartNICs - MediaTek MT8195 switches - WiFi: - mt76: MediaTek mt7916 - mt76: MediaTek mt7921u USB adapters - brcmfmac: Broadcom BCM43454/6 - Mobile: - iosm: Intel M.2 7360 WWAN card Drivers ------- - Convert many drivers to the new phylink API built for split PCS designs but also simplifying other cases. - Intel Ethernet NICs: - add TTY for GNSS module for E810T device - improve AF_XDP performance - GTP-C and GTP-U filter offload - QinQ VLAN support - Mellanox Ethernet NICs (mlx5): - support xdp->data_meta - multi-buffer XDP - offload tc push_eth and pop_eth actions - Netronome Ethernet NICs (nfp): - flow-independent tc action hardware offload (police / meter) - AF_XDP - Other Ethernet NICs: - at803x: fiber and SFP support - xgmac: mdio: preamble suppression and custom MDC frequencies - r8169: enable ASPM L1.2 if system vendor flags it as safe - macb/gem: ZynqMP SGMII - hns3: add TX push mode - dpaa2-eth: software TSO - lan743x: multi-queue, mdio, SGMII, PTP - axienet: NAPI and GRO support - Mellanox Ethernet switches (mlxsw): - source and dest IP address rewrites - RJ45 ports - Marvell Ethernet switches (prestera): - basic routing offload - multi-chain TC ACL offload - NXP embedded Ethernet switches (ocelot & felix): - PTP over UDP with the ocelot-8021q DSA tagging protocol - basic QoS classification on Felix DSA switch using dcbnl - port mirroring for ocelot switches - Microchip high-speed industrial Ethernet (sparx5): - offloading of bridge port flooding flags - PTP Hardware Clock - Other embedded switches: - lan966x: PTP Hardward Clock - qca8k: mdio read/write operations via crafted Ethernet packets - Qualcomm 802.11ax WiFi (ath11k): - add LDPC FEC type and 802.11ax High Efficiency data in radiotap - enable RX PPDU stats in monitor co-exist mode - Intel WiFi (iwlwifi): - UHB TAS enablement via BIOS - band disablement via BIOS - channel switch offload - 32 Rx AMPDU sessions in newer devices - MediaTek WiFi (mt76): - background radar detection - thermal management improvements on mt7915 - SAR support for more mt76 platforms - MBSSID and 6 GHz band on mt7915 - RealTek WiFi: - rtw89: AP mode - rtw89: 160 MHz channels and 6 GHz band - rtw89: hardware scan - Bluetooth: - mt7921s: wake on Bluetooth, SCO over I2S, wide-band-speed (WBS) - Microchip CAN (mcp251xfd): - multiple RX-FIFOs and runtime configurable RX/TX rings - internal PLL, runtime PM handling simplification - improve chip detection and error handling after wakeup" * tag 'net-next-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2521 commits) llc: fix netdevice reference leaks in llc_ui_bind() drivers: ethernet: cpsw: fix panic when interrupt coaleceing is set via ethtool ice: don't allow to run ice_send_event_to_aux() in atomic ctx ice: fix 'scheduling while atomic' on aux critical err interrupt net/sched: fix incorrect vlan_push_eth dest field net: bridge: mst: Restrict info size queries to bridge ports net: marvell: prestera: add missing destroy_workqueue() in prestera_module_init() drivers: net: xgene: Fix regression in CRC stripping net: geneve: add missing netlink policy and size for IFLA_GENEVE_INNER_PROTO_INHERIT net: dsa: fix missing host-filtered multicast addresses net/mlx5e: Fix build warning, detected write beyond size of field iwlwifi: mvm: Don't fail if PPAG isn't supported selftests/bpf: Fix kprobe_multi test. Revert "rethook: x86: Add rethook x86 implementation" Revert "arm64: rethook: Add arm64 rethook implementation" Revert "powerpc: Add rethook support" Revert "ARM: rethook: Add rethook arm implementation" netdevice: add missing dm_private kdoc net: bridge: mst: prevent NULL deref in br_mst_info_size() selftests: forwarding: Use same VRF for port and VLAN upper ...
author: Linus Torvalds <torvalds@linux-foundation.org> 2022-03-24 23:13:26 +0300
committer: Linus Torvalds <torvalds@linux-foundation.org> 2022-03-24 23:13:26 +0300
commit: 169e77764adc041b1dacba84ea90516a895d43b2 (patch)
tree: af7124681fa65d40fccee902af5194ab9f9c95f4 /net
parent: 7403e6d8263937dea206dd201fed1ceed190ca18 (diff)
parent: 89695196f0ba78a17453f9616355f2ca6b293402 (diff)
download: linux-169e77764adc041b1dacba84ea90516a895d43b2.tar.xz
337 files changed, 12623 insertions, 4250 deletions
diff --git a/net/6lowpan/core.c b/net/6lowpan/core.c
index a068757eabaf..7b3341cef926 100644
--- a/net/6lowpan/core.c
+++ b/net/6lowpan/core.c
@@ -5,6 +5,7 @@
  * (C) 2015 Pengutronix, Alexander Aring <aar@pengutronix.de>
  */
 
+#include <linux/if_arp.h>
 #include <linux/module.h>
 
 #include <net/6lowpan.h>
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index d1902828a18a..e5d23e75572a 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -638,12 +638,7 @@ void vlan_dev_free_egress_priority(const struct net_device *dev)
 
 static void vlan_dev_uninit(struct net_device *dev)
 {
-	struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
-
 	vlan_dev_free_egress_priority(dev);
-
-	/* Get rid of the vlan's reference to real_dev */
-	dev_put_track(vlan->real_dev, &vlan->dev_tracker);
 }
 
 static netdev_features_t vlan_dev_fix_features(struct net_device *dev,
@@ -856,6 +851,9 @@ static void vlan_dev_free(struct net_device *dev)
 
 	free_percpu(vlan->vlan_pcpu_stats);
 	vlan->vlan_pcpu_stats = NULL;
+
+	/* Get rid of the vlan's reference to real_dev */
+	dev_put_track(vlan->real_dev, &vlan->dev_tracker);
 }
 
 void vlan_setup(struct net_device *dev)
diff --git a/net/8021q/vlanproc.c b/net/8021q/vlanproc.c
index 08bf6c839e25..7825c129742a 100644
--- a/net/8021q/vlanproc.c
+++ b/net/8021q/vlanproc.c
@@ -280,7 +280,7 @@ static int vlandev_seq_show(struct seq_file *seq, void *offset)
 		const struct vlan_priority_tci_mapping *mp
 			= vlan->egress_priority_map[i];
 		while (mp) {
-			seq_printf(seq, "%u:%hu ",
+			seq_printf(seq, "%u:%d ",
 				   mp->priority, ((mp->vlan_qos >> 13) & 0x7));
 			mp = mp->next;
 		}
diff --git a/net/Kconfig b/net/Kconfig
index 8a1f9d0287de..6b78f695caa6 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -434,6 +434,19 @@ config NET_DEVLINK
 config PAGE_POOL
 	bool
 
+config PAGE_POOL_STATS
+	default n
+	bool "Page pool stats"
+	depends on PAGE_POOL
+	help
+	  Enable page pool statistics to track page allocation and recycling
+	  in page pools. This option incurs additional CPU cost in allocation
+	  and recycle paths and additional memory cost to store the statistics.
+	  These statistics are only available if this option is enabled and if
+	  the driver using the page pool supports exporting this data.
+
+	  If unsure, say N.
+
 config FAILOVER
 	tristate "Generic failover module"
 	help
diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
index 6bd097180772..992b6e5d85d7 100644
--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -89,18 +89,20 @@ again:
 			sk = s->sk;
 			if (!sk) {
 				spin_unlock_bh(&ax25_list_lock);
-				s->ax25_dev = NULL;
 				ax25_disconnect(s, ENETUNREACH);
+				s->ax25_dev = NULL;
 				spin_lock_bh(&ax25_list_lock);
 				goto again;
 			}
 			sock_hold(sk);
 			spin_unlock_bh(&ax25_list_lock);
 			lock_sock(sk);
-			s->ax25_dev = NULL;
-			dev_put_track(ax25_dev->dev, &ax25_dev->dev_tracker);
-			ax25_dev_put(ax25_dev);
 			ax25_disconnect(s, ENETUNREACH);
+			s->ax25_dev = NULL;
+			if (sk->sk_socket) {
+				dev_put_track(ax25_dev->dev, &ax25_dev->dev_tracker);
+				ax25_dev_put(ax25_dev);
+			}
 			release_sock(sk);
 			spin_lock_bh(&ax25_list_lock);
 			sock_put(sk);
@@ -979,14 +981,20 @@ static int ax25_release(struct socket *sock)
 {
 	struct sock *sk = sock->sk;
 	ax25_cb *ax25;
+	ax25_dev *ax25_dev;
 
 	if (sk == NULL)
 		return 0;
 
 	sock_hold(sk);
-	sock_orphan(sk);
 	lock_sock(sk);
+	sock_orphan(sk);
 	ax25 = sk_to_ax25(sk);
+	ax25_dev = ax25->ax25_dev;
+	if (ax25_dev) {
+		dev_put_track(ax25_dev->dev, &ax25_dev->dev_tracker);
+		ax25_dev_put(ax25_dev);
+	}
 
 	if (sk->sk_type == SOCK_SEQPACKET) {
 		switch (ax25->state) {
diff --git a/net/ax25/ax25_route.c b/net/ax25/ax25_route.c
index 9751207f7757..b7c4d656a94b 100644
--- a/net/ax25/ax25_route.c
+++ b/net/ax25/ax25_route.c
@@ -116,7 +116,6 @@ static int __must_check ax25_rt_add(struct ax25_routes_struct *route)
 		return -ENOMEM;
 	}
 
-	refcount_set(&ax25_rt->refcount, 1);
 	ax25_rt->callsign     = route->dest_addr;
 	ax25_rt->dev          = ax25_dev->dev;
 	ax25_rt->digipeat     = NULL;
@@ -167,12 +166,12 @@ static int ax25_rt_del(struct ax25_routes_struct *route)
 		    ax25cmp(&route->dest_addr, &s->callsign) == 0) {
 			if (ax25_route_list == s) {
 				ax25_route_list = s->next;
-				ax25_put_route(s);
+				__ax25_put_route(s);
 			} else {
 				for (t = ax25_route_list; t != NULL; t = t->next) {
 					if (t->next == s) {
 						t->next = s->next;
-						ax25_put_route(s);
+						__ax25_put_route(s);
 						break;
 					}
 				}
diff --git a/net/ax25/ax25_subr.c b/net/ax25/ax25_subr.c
index 15ab812c4fe4..3a476e4f6cd0 100644
--- a/net/ax25/ax25_subr.c
+++ b/net/ax25/ax25_subr.c
@@ -261,12 +261,20 @@ void ax25_disconnect(ax25_cb *ax25, int reason)
 {
 	ax25_clear_queues(ax25);
 
-	if (!ax25->sk || !sock_flag(ax25->sk, SOCK_DESTROY))
-		ax25_stop_heartbeat(ax25);
-	ax25_stop_t1timer(ax25);
-	ax25_stop_t2timer(ax25);
-	ax25_stop_t3timer(ax25);
-	ax25_stop_idletimer(ax25);
+	if (reason == ENETUNREACH) {
+		del_timer_sync(&ax25->timer);
+		del_timer_sync(&ax25->t1timer);
+		del_timer_sync(&ax25->t2timer);
+		del_timer_sync(&ax25->t3timer);
+		del_timer_sync(&ax25->idletimer);
+	} else {
+		if (!ax25->sk || !sock_flag(ax25->sk, SOCK_DESTROY))
+			ax25_stop_heartbeat(ax25);
+		ax25_stop_t1timer(ax25);
+		ax25_stop_t2timer(ax25);
+		ax25_stop_t3timer(ax25);
+		ax25_stop_idletimer(ax25);
+	}
 
 	ax25->state = AX25_STATE_0;
 
diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index f94f538fa382..7f6a7c96ac92 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -13,13 +13,13 @@
 #include <linux/bug.h>
 #include <linux/byteorder/generic.h>
 #include <linux/cache.h>
+#include <linux/container_of.h>
 #include <linux/errno.h>
 #include <linux/etherdevice.h>
 #include <linux/gfp.h>
 #include <linux/if_ether.h>
 #include <linux/init.h>
 #include <linux/jiffies.h>
-#include <linux/kernel.h>
 #include <linux/kref.h>
 #include <linux/list.h>
 #include <linux/lockdep.h>
diff --git a/net/batman-adv/bat_v_elp.c b/net/batman-adv/bat_v_elp.c
index 71999e13f729..b6db999abf75 100644
--- a/net/batman-adv/bat_v_elp.c
+++ b/net/batman-adv/bat_v_elp.c
@@ -10,13 +10,13 @@
 #include <linux/atomic.h>
 #include <linux/bitops.h>
 #include <linux/byteorder/generic.h>
+#include <linux/container_of.h>
 #include <linux/errno.h>
 #include <linux/etherdevice.h>
 #include <linux/ethtool.h>
 #include <linux/gfp.h>
 #include <linux/if_ether.h>
 #include <linux/jiffies.h>
-#include <linux/kernel.h>
 #include <linux/kref.h>
 #include <linux/minmax.h>
 #include <linux/netdevice.h>
diff --git a/net/batman-adv/bat_v_ogm.c b/net/batman-adv/bat_v_ogm.c
index 1d750f3cb2e4..033639df96d8 100644
--- a/net/batman-adv/bat_v_ogm.c
+++ b/net/batman-adv/bat_v_ogm.c
@@ -9,12 +9,12 @@
 
 #include <linux/atomic.h>
 #include <linux/byteorder/generic.h>
+#include <linux/container_of.h>
 #include <linux/errno.h>
 #include <linux/etherdevice.h>
 #include <linux/gfp.h>
 #include <linux/if_ether.h>
 #include <linux/jiffies.h>
-#include <linux/kernel.h>
 #include <linux/kref.h>
 #include <linux/list.h>
 #include <linux/lockdep.h>
diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c
index 2ed9496fc41f..7f8a14d99cdb 100644
--- a/net/batman-adv/bridge_loop_avoidance.c
+++ b/net/batman-adv/bridge_loop_avoidance.c
@@ -10,6 +10,7 @@
 #include <linux/atomic.h>
 #include <linux/byteorder/generic.h>
 #include <linux/compiler.h>
+#include <linux/container_of.h>
 #include <linux/crc16.h>
 #include <linux/errno.h>
 #include <linux/etherdevice.h>
@@ -443,7 +444,7 @@ static void batadv_bla_send_claim(struct batadv_priv *bat_priv, const u8 *mac,
 	batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES,
 			   skb->len + ETH_HLEN);
 
-	netif_rx_any_context(skb);
+	netif_rx(skb);
 out:
 	batadv_hardif_put(primary_if);
 }
diff --git a/net/batman-adv/distributed-arp-table.c b/net/batman-adv/distributed-arp-table.c
index 2f008e329007..fefb51a5f606 100644
--- a/net/batman-adv/distributed-arp-table.c
+++ b/net/batman-adv/distributed-arp-table.c
@@ -11,6 +11,7 @@
 #include <linux/atomic.h>
 #include <linux/bitops.h>
 #include <linux/byteorder/generic.h>
+#include <linux/container_of.h>
 #include <linux/errno.h>
 #include <linux/etherdevice.h>
 #include <linux/gfp.h>
@@ -20,7 +21,6 @@
 #include <linux/in.h>
 #include <linux/ip.h>
 #include <linux/jiffies.h>
-#include <linux/kernel.h>
 #include <linux/kref.h>
 #include <linux/list.h>
 #include <linux/netlink.h>
diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c
index b7466136e292..d26124bc27e1 100644
--- a/net/batman-adv/gateway_client.c
+++ b/net/batman-adv/gateway_client.c
@@ -9,6 +9,7 @@
 
 #include <linux/atomic.h>
 #include <linux/byteorder/generic.h>
+#include <linux/container_of.h>
 #include <linux/errno.h>
 #include <linux/etherdevice.h>
 #include <linux/gfp.h>
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index 35fadb924849..83fb51b6e299 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -9,11 +9,11 @@
 
 #include <linux/atomic.h>
 #include <linux/byteorder/generic.h>
+#include <linux/container_of.h>
 #include <linux/gfp.h>
 #include <linux/if.h>
 #include <linux/if_arp.h>
 #include <linux/if_ether.h>
-#include <linux/kernel.h>
 #include <linux/kref.h>
 #include <linux/limits.h>
 #include <linux/list.h>
@@ -168,9 +168,9 @@ static bool batadv_is_on_batman_iface(const struct net_device *net_dev)
 
 	/* recurse over the parent device */
 	parent_dev = __dev_get_by_index((struct net *)parent_net, iflink);
-	/* if we got a NULL parent_dev there is something broken.. */
 	if (!parent_dev) {
-		pr_err("Cannot find parent device\n");
+		pr_warn("Cannot find parent device. Skipping batadv-on-batadv check for %s\n",
+			net_dev->name);
 		return false;
 	}
 
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index 5207cd8d6ad8..e8a449915566 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -9,6 +9,7 @@
 #include <linux/atomic.h>
 #include <linux/build_bug.h>
 #include <linux/byteorder/generic.h>
+#include <linux/container_of.h>
 #include <linux/crc32c.h>
 #include <linux/device.h>
 #include <linux/errno.h>
@@ -132,7 +133,6 @@ static void __exit batadv_exit(void)
 	rtnl_link_unregister(&batadv_link_ops);
 	unregister_netdevice_notifier(&batadv_hard_if_notifier);
 
-	flush_workqueue(batadv_event_workqueue);
 	destroy_workqueue(batadv_event_workqueue);
 	batadv_event_workqueue = NULL;
 
diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
index 494d1ebecac2..f3be82999f1f 100644
--- a/net/batman-adv/main.h
+++ b/net/batman-adv/main.h
@@ -13,7 +13,7 @@
 #define BATADV_DRIVER_DEVICE "batman-adv"
 
 #ifndef BATADV_SOURCE_VERSION
-#define BATADV_SOURCE_VERSION "2022.0"
+#define BATADV_SOURCE_VERSION "2022.1"
 #endif
 
 /* B.A.T.M.A.N. parameters */
diff --git a/net/batman-adv/multicast.c b/net/batman-adv/multicast.c
index f4004cf0ff6f..b238455913df 100644
--- a/net/batman-adv/multicast.c
+++ b/net/batman-adv/multicast.c
@@ -11,6 +11,7 @@
 #include <linux/bitops.h>
 #include <linux/bug.h>
 #include <linux/byteorder/generic.h>
+#include <linux/container_of.h>
 #include <linux/errno.h>
 #include <linux/etherdevice.h>
 #include <linux/gfp.h>
@@ -134,7 +135,7 @@ static u8 batadv_mcast_mla_rtr_flags_softif_get_ipv6(struct net_device *dev)
 {
 	struct inet6_dev *in6_dev = __in6_dev_get(dev);
 
-	if (in6_dev && in6_dev->cnf.mc_forwarding)
+	if (in6_dev && atomic_read(&in6_dev->cnf.mc_forwarding))
 		return BATADV_NO_FLAGS;
 	else
 		return BATADV_MCAST_WANT_NO_RTR6;
diff --git a/net/batman-adv/network-coding.c b/net/batman-adv/network-coding.c
index 974d726fabb9..5f4aeeb60dc4 100644
--- a/net/batman-adv/network-coding.c
+++ b/net/batman-adv/network-coding.c
@@ -11,6 +11,7 @@
 #include <linux/bitops.h>
 #include <linux/byteorder/generic.h>
 #include <linux/compiler.h>
+#include <linux/container_of.h>
 #include <linux/errno.h>
 #include <linux/etherdevice.h>
 #include <linux/gfp.h>
@@ -19,7 +20,6 @@
 #include <linux/init.h>
 #include <linux/jhash.h>
 #include <linux/jiffies.h>
-#include <linux/kernel.h>
 #include <linux/kref.h>
 #include <linux/list.h>
 #include <linux/lockdep.h>
diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c
index aadc653ca1d8..34903df4fe93 100644
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@ -8,11 +8,11 @@
 #include "main.h"
 
 #include <linux/atomic.h>
+#include <linux/container_of.h>
 #include <linux/errno.h>
 #include <linux/etherdevice.h>
 #include <linux/gfp.h>
 #include <linux/jiffies.h>
-#include <linux/kernel.h>
 #include <linux/kref.h>
 #include <linux/list.h>
 #include <linux/lockdep.h>
diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c
index 477d85a3b558..0379b126865d 100644
--- a/net/batman-adv/send.c
+++ b/net/batman-adv/send.c
@@ -10,13 +10,13 @@
 #include <linux/atomic.h>
 #include <linux/bug.h>
 #include <linux/byteorder/generic.h>
+#include <linux/container_of.h>
 #include <linux/errno.h>
 #include <linux/etherdevice.h>
 #include <linux/gfp.h>
 #include <linux/if.h>
 #include <linux/if_ether.h>
 #include <linux/jiffies.h>
-#include <linux/kernel.h>
 #include <linux/kref.h>
 #include <linux/list.h>
 #include <linux/netdevice.h>
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index 2dbbe6c19609..0f5c0679b55a 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -11,6 +11,7 @@
 #include <linux/byteorder/generic.h>
 #include <linux/cache.h>
 #include <linux/compiler.h>
+#include <linux/container_of.h>
 #include <linux/cpumask.h>
 #include <linux/errno.h>
 #include <linux/etherdevice.h>
@@ -19,7 +20,6 @@
 #include <linux/if_ether.h>
 #include <linux/if_vlan.h>
 #include <linux/jiffies.h>
-#include <linux/kernel.h>
 #include <linux/kref.h>
 #include <linux/list.h>
 #include <linux/lockdep.h>
diff --git a/net/batman-adv/tp_meter.c b/net/batman-adv/tp_meter.c
index 93730d30af54..7f3dd3c393e0 100644
--- a/net/batman-adv/tp_meter.c
+++ b/net/batman-adv/tp_meter.c
@@ -12,13 +12,13 @@
 #include <linux/byteorder/generic.h>
 #include <linux/cache.h>
 #include <linux/compiler.h>
+#include <linux/container_of.h>
 #include <linux/err.h>
 #include <linux/etherdevice.h>
 #include <linux/gfp.h>
 #include <linux/if_ether.h>
 #include <linux/init.h>
 #include <linux/jiffies.h>
-#include <linux/kernel.h>
 #include <linux/kref.h>
 #include <linux/kthread.h>
 #include <linux/limits.h>
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
index 4b7ad6684bc4..8478034d3abf 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -13,6 +13,7 @@
 #include <linux/byteorder/generic.h>
 #include <linux/cache.h>
 #include <linux/compiler.h>
+#include <linux/container_of.h>
 #include <linux/crc32c.h>
 #include <linux/errno.h>
 #include <linux/etherdevice.h>
@@ -21,7 +22,6 @@
 #include <linux/init.h>
 #include <linux/jhash.h>
 #include <linux/jiffies.h>
-#include <linux/kernel.h>
 #include <linux/kref.h>
 #include <linux/list.h>
 #include <linux/lockdep.h>
diff --git a/net/batman-adv/tvlv.c b/net/batman-adv/tvlv.c
index 0cb58eb04093..7ec2e2343884 100644
--- a/net/batman-adv/tvlv.c
+++ b/net/batman-adv/tvlv.c
@@ -7,10 +7,10 @@
 #include "main.h"
 
 #include <linux/byteorder/generic.h>
+#include <linux/container_of.h>
 #include <linux/etherdevice.h>
 #include <linux/gfp.h>
 #include <linux/if_ether.h>
-#include <linux/kernel.h>
 #include <linux/kref.h>
 #include <linux/list.h>
 #include <linux/lockdep.h>
diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c
index 133d7ea063fb..215af9b3b589 100644
--- a/net/bluetooth/6lowpan.c
+++ b/net/bluetooth/6lowpan.c
@@ -240,7 +240,7 @@ static int give_skb_to_upper(struct sk_buff *skb, struct net_device *dev)
 	if (!skb_cp)
 		return NET_RX_DROP;
 
-	return netif_rx_ni(skb_cp);
+	return netif_rx(skb_cp);
 }
 
 static int iphc_decompress(struct sk_buff *skb, struct net_device *netdev,
@@ -641,7 +641,6 @@ static struct l2cap_chan *add_peer_chan(struct l2cap_chan *chan,
 		return NULL;
 
 	peer->chan = chan;
-	memset(&peer->peer_addr, 0, sizeof(struct in6_addr));
 
 	baswap((void *)peer->lladdr, &chan->dst);
 
diff --git a/net/bluetooth/af_bluetooth.c b/net/bluetooth/af_bluetooth.c
index ee319779781e..a0cb2e3da8d4 100644
--- a/net/bluetooth/af_bluetooth.c
+++ b/net/bluetooth/af_bluetooth.c
@@ -568,7 +568,7 @@ int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo)
 EXPORT_SYMBOL(bt_sock_wait_state);
 
 /* This function expects the sk lock to be held when called */
-int bt_sock_wait_ready(struct sock *sk, unsigned long flags)
+int bt_sock_wait_ready(struct sock *sk, unsigned int msg_flags)
 {
 	DECLARE_WAITQUEUE(wait, current);
 	unsigned long timeo;
@@ -576,7 +576,7 @@ int bt_sock_wait_ready(struct sock *sk, unsigned long flags)
 
 	BT_DBG("sk %p", sk);
 
-	timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
+	timeo = sock_sndtimeo(sk, !!(msg_flags & MSG_DONTWAIT));
 
 	add_wait_queue(sk_sleep(sk), &wait);
 	set_current_state(TASK_INTERRUPTIBLE);
diff --git a/net/bluetooth/bnep/core.c b/net/bluetooth/bnep/core.c
index 40baa6b7321a..5a6a49885ab6 100644
--- a/net/bluetooth/bnep/core.c
+++ b/net/bluetooth/bnep/core.c
@@ -400,7 +400,7 @@ static int bnep_rx_frame(struct bnep_session *s, struct sk_buff *skb)
 	dev->stats.rx_packets++;
 	nskb->ip_summed = CHECKSUM_NONE;
 	nskb->protocol  = eth_type_trans(nskb, dev);
-	netif_rx_ni(nskb);
+	netif_rx(nskb);
 	return 0;
 
 badframe:
diff --git a/net/bluetooth/eir.h b/net/bluetooth/eir.h
index 05e2e917fc25..43f1945bffc5 100644
--- a/net/bluetooth/eir.h
+++ b/net/bluetooth/eir.h
@@ -15,6 +15,11 @@ u8 eir_create_scan_rsp(struct hci_dev *hdev, u8 instance, u8 *ptr);
 u8 eir_append_local_name(struct hci_dev *hdev, u8 *eir, u8 ad_len);
 u8 eir_append_appearance(struct hci_dev *hdev, u8 *ptr, u8 ad_len);
 
+static inline u16 eir_precalc_len(u8 data_len)
+{
+	return sizeof(u8) * 2 + data_len;
+}
+
 static inline u16 eir_append_data(u8 *eir, u16 eir_len, u8 type,
 				  u8 *data, u8 data_len)
 {
@@ -36,6 +41,21 @@ static inline u16 eir_append_le16(u8 *eir, u16 eir_len, u8 type, u16 data)
 	return eir_len;
 }
 
+static inline u16 eir_skb_put_data(struct sk_buff *skb, u8 type, u8 *data, u8 data_len)
+{
+	u8 *eir;
+	u16 eir_len;
+
+	eir_len	= eir_precalc_len(data_len);
+	eir = skb_put(skb, eir_len);
+	WARN_ON(sizeof(type) + data_len > U8_MAX);
+	eir[0] = sizeof(type) + data_len;
+	eir[1] = type;
+	memcpy(&eir[2], data, data_len);
+
+	return eir_len;
+}
+
 static inline void *eir_get_data(u8 *eir, size_t eir_len, u8 type,
 				 size_t *data_len)
 {
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 04ebe901e86f..84312c836549 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -669,7 +669,9 @@ static void le_conn_timeout(struct work_struct *work)
 	if (conn->role == HCI_ROLE_SLAVE) {
 		/* Disable LE Advertising */
 		le_disable_advertising(hdev);
+		hci_dev_lock(hdev);
 		hci_le_conn_failed(conn, HCI_ERROR_ADVERTISING_TIMEOUT);
+		hci_dev_unlock(hdev);
 		return;
 	}
 
@@ -689,6 +691,7 @@ struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
 
 	bacpy(&conn->dst, dst);
 	bacpy(&conn->src, &hdev->bdaddr);
+	conn->handle = HCI_CONN_HANDLE_UNSET;
 	conn->hdev  = hdev;
 	conn->type  = type;
 	conn->role  = role;
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 2882bc7d79d7..b4782a6c1025 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2503,6 +2503,7 @@ struct hci_dev *hci_alloc_dev_priv(int sizeof_priv)
 	INIT_LIST_HEAD(&hdev->conn_hash.list);
 	INIT_LIST_HEAD(&hdev->adv_instances);
 	INIT_LIST_HEAD(&hdev->blocked_keys);
+	INIT_LIST_HEAD(&hdev->monitored_devices);
 
 	INIT_LIST_HEAD(&hdev->local_codecs);
 	INIT_WORK(&hdev->rx_work, hci_rx_work);
@@ -3667,8 +3668,8 @@ static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
 		sco_recv_scodata(conn, skb);
 		return;
 	} else {
-		bt_dev_err(hdev, "SCO packet for unknown connection handle %d",
-			   handle);
+		bt_dev_err_ratelimited(hdev, "SCO packet for unknown connection handle %d",
+				       handle);
 	}
 
 	kfree_skb(skb);
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index fc30f4c03d29..abaabfae19cc 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -3068,6 +3068,11 @@ static void hci_conn_complete_evt(struct hci_dev *hdev, void *data,
 	struct hci_ev_conn_complete *ev = data;
 	struct hci_conn *conn;
 
+	if (__le16_to_cpu(ev->handle) > HCI_CONN_HANDLE_MAX) {
+		bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for invalid handle");
+		return;
+	}
+
 	bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
 
 	hci_dev_lock(hdev);
@@ -3106,6 +3111,17 @@ static void hci_conn_complete_evt(struct hci_dev *hdev, void *data,
 		}
 	}
 
+	/* The HCI_Connection_Complete event is only sent once per connection.
+	 * Processing it more than once per connection can corrupt kernel memory.
+	 *
+	 * As the connection handle is set here for the first time, it indicates
+	 * whether the connection is already set up.
+	 */
+	if (conn->handle != HCI_CONN_HANDLE_UNSET) {
+		bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
+		goto unlock;
+	}
+
 	if (!ev->status) {
 		conn->handle = __le16_to_cpu(ev->handle);
 
@@ -4534,7 +4550,7 @@ static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, void *edata,
 			if (!info) {
 				bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
 					   HCI_EV_INQUIRY_RESULT_WITH_RSSI);
-				return;
+				goto unlock;
 			}
 
 			bacpy(&data.bdaddr, &info->bdaddr);
@@ -4565,7 +4581,7 @@ static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, void *edata,
 			if (!info) {
 				bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
 					   HCI_EV_INQUIRY_RESULT_WITH_RSSI);
-				return;
+				goto unlock;
 			}
 
 			bacpy(&data.bdaddr, &info->bdaddr);
@@ -4587,7 +4603,7 @@ static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, void *edata,
 		bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
 			   HCI_EV_INQUIRY_RESULT_WITH_RSSI);
 	}
-
+unlock:
 	hci_dev_unlock(hdev);
 }
 
@@ -4661,6 +4677,24 @@ static void hci_sync_conn_complete_evt(struct hci_dev *hdev, void *data,
 	struct hci_ev_sync_conn_complete *ev = data;
 	struct hci_conn *conn;
 
+	switch (ev->link_type) {
+	case SCO_LINK:
+	case ESCO_LINK:
+		break;
+	default:
+		/* As per Core 5.3 Vol 4 Part E 7.7.35 (p.2219), Link_Type
+		 * for HCI_Synchronous_Connection_Complete is limited to
+		 * either SCO or eSCO
+		 */
+		bt_dev_err(hdev, "Ignoring connect complete event for invalid link type");
+		return;
+	}
+
+	if (__le16_to_cpu(ev->handle) > HCI_CONN_HANDLE_MAX) {
+		bt_dev_err(hdev, "Ignoring HCI_Sync_Conn_Complete for invalid handle");
+		return;
+	}
+
 	bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
 
 	hci_dev_lock(hdev);
@@ -4684,23 +4718,19 @@ static void hci_sync_conn_complete_evt(struct hci_dev *hdev, void *data,
 			goto unlock;
 	}
 
+	/* The HCI_Synchronous_Connection_Complete event is only sent once per connection.
+	 * Processing it more than once per connection can corrupt kernel memory.
+	 *
+	 * As the connection handle is set here for the first time, it indicates
+	 * whether the connection is already set up.
+	 */
+	if (conn->handle != HCI_CONN_HANDLE_UNSET) {
+		bt_dev_err(hdev, "Ignoring HCI_Sync_Conn_Complete event for existing connection");
+		goto unlock;
+	}
+
 	switch (ev->status) {
 	case 0x00:
-		/* The synchronous connection complete event should only be
-		 * sent once per new connection. Receiving a successful
-		 * complete event when the connection status is already
-		 * BT_CONNECTED means that the device is misbehaving and sent
-		 * multiple complete event packets for the same new connection.
-		 *
-		 * Registering the device more than once can corrupt kernel
-		 * memory, hence upon detecting this invalid event, we report
-		 * an error and ignore the packet.
-		 */
-		if (conn->state == BT_CONNECTED) {
-			bt_dev_err(hdev, "Ignoring connect complete event for existing connection");
-			goto unlock;
-		}
-
 		conn->handle = __le16_to_cpu(ev->handle);
 		conn->state  = BT_CONNECTED;
 		conn->type   = ev->link_type;
@@ -5423,8 +5453,9 @@ static void hci_disconn_phylink_complete_evt(struct hci_dev *hdev, void *data,
 	hci_dev_lock(hdev);
 
 	hcon = hci_conn_hash_lookup_handle(hdev, ev->phy_handle);
-	if (hcon) {
+	if (hcon && hcon->type == AMP_LINK) {
 		hcon->state = BT_CLOSED;
+		hci_disconn_cfm(hcon, ev->reason);
 		hci_conn_del(hcon);
 	}
 
@@ -5496,6 +5527,11 @@ static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
 	struct smp_irk *irk;
 	u8 addr_type;
 
+	if (handle > HCI_CONN_HANDLE_MAX) {
+		bt_dev_err(hdev, "Ignoring HCI_LE_Connection_Complete for invalid handle");
+		return;
+	}
+
 	hci_dev_lock(hdev);
 
 	/* All controllers implicitly stop advertising in the event of a
@@ -5537,6 +5573,17 @@ static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
 		cancel_delayed_work(&conn->le_conn_timeout);
 	}
 
+	/* The HCI_LE_Connection_Complete event is only sent once per connection.
+	 * Processing it more than once per connection can corrupt kernel memory.
+	 *
+	 * As the connection handle is set here for the first time, it indicates
+	 * whether the connection is already set up.
+	 */
+	if (conn->handle != HCI_CONN_HANDLE_UNSET) {
+		bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
+		goto unlock;
+	}
+
 	le_conn_update_addr(conn, bdaddr, bdaddr_type, local_rpa);
 
 	/* Lookup the identity address from the stored connection
@@ -5670,8 +5717,6 @@ static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, void *data,
 
 	bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
 
-	adv = hci_find_adv_instance(hdev, ev->handle);
-
 	/* The Bluetooth Core 5.3 specification clearly states that this event
 	 * shall not be sent when the Host disables the advertising set. So in
 	 * case of HCI_ERROR_CANCELLED_BY_HOST, just ignore the event.
@@ -5684,9 +5729,13 @@ static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, void *data,
 		return;
 	}
 
+	hci_dev_lock(hdev);
+
+	adv = hci_find_adv_instance(hdev, ev->handle);
+
 	if (ev->status) {
 		if (!adv)
-			return;
+			goto unlock;
 
 		/* Remove advertising as it has been terminated */
 		hci_remove_adv_instance(hdev, ev->handle);
@@ -5694,12 +5743,12 @@ static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, void *data,
 
 		list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
 			if (adv->enabled)
-				return;
+				goto unlock;
 		}
 
 		/* We are no longer advertising, clear HCI_LE_ADV */
 		hci_dev_clear_flag(hdev, HCI_LE_ADV);
-		return;
+		goto unlock;
 	}
 
 	if (adv)
@@ -5714,16 +5763,19 @@ static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, void *data,
 
 		if (hdev->adv_addr_type != ADDR_LE_DEV_RANDOM ||
 		    bacmp(&conn->resp_addr, BDADDR_ANY))
-			return;
+			goto unlock;
 
 		if (!ev->handle) {
 			bacpy(&conn->resp_addr, &hdev->random_addr);
-			return;
+			goto unlock;
 		}
 
 		if (adv)
 			bacpy(&conn->resp_addr, &adv->random_addr);
 	}
+
+unlock:
+	hci_dev_unlock(hdev);
 }
 
 static void hci_le_conn_update_complete_evt(struct hci_dev *hdev, void *data,
@@ -6798,7 +6850,7 @@ static const struct hci_ev {
 	HCI_EV(HCI_EV_NUM_COMP_BLOCKS, hci_num_comp_blocks_evt,
 	       sizeof(struct hci_ev_num_comp_blocks)),
 	/* [0xff = HCI_EV_VENDOR] */
-	HCI_EV(HCI_EV_VENDOR, msft_vendor_evt, 0),
+	HCI_EV_VL(HCI_EV_VENDOR, msft_vendor_evt, 0, HCI_MAX_EVENT_SIZE),
 };
 
 static void hci_event_func(struct hci_dev *hdev, u8 event, struct sk_buff *skb,
@@ -6823,8 +6875,9 @@ static void hci_event_func(struct hci_dev *hdev, u8 event, struct sk_buff *skb,
 	 * decide if that is acceptable.
 	 */
 	if (skb->len > ev->max_len)
-		bt_dev_warn(hdev, "unexpected event 0x%2.2x length: %u > %u",
-			    event, skb->len, ev->max_len);
+		bt_dev_warn_ratelimited(hdev,
+					"unexpected event 0x%2.2x length: %u > %u",
+					event, skb->len, ev->max_len);
 
 	data = hci_ev_skb_pull(hdev, skb, event, ev->min_len);
 	if (!data)
diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
index ab9aa700b6b3..8f4c5698913d 100644
--- a/net/bluetooth/hci_sync.c
+++ b/net/bluetooth/hci_sync.c
@@ -379,6 +379,9 @@ int hci_cmd_sync_queue(struct hci_dev *hdev, hci_cmd_sync_work_func_t func,
 {
 	struct hci_cmd_sync_work_entry *entry;
 
+	if (hci_dev_test_flag(hdev, HCI_UNREGISTER))
+		return -ENODEV;
+
 	entry = kmalloc(sizeof(*entry), GFP_KERNEL);
 	if (!entry)
 		return -ENOMEM;
@@ -2806,6 +2809,9 @@ static int hci_set_event_filter_sync(struct hci_dev *hdev, u8 flt_type,
 	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
 		return 0;
 
+	if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
+		return 0;
+
 	memset(&cp, 0, sizeof(cp));
 	cp.flt_type = flt_type;
 
@@ -2826,6 +2832,13 @@ static int hci_clear_event_filter_sync(struct hci_dev *hdev)
 	if (!hci_dev_test_flag(hdev, HCI_EVENT_FILTER_CONFIGURED))
 		return 0;
 
+	/* In theory the state machine should not reach here unless
+	 * a hci_set_event_filter_sync() call succeeds, but we do
+	 * the check both for parity and as a future reminder.
+	 */
+	if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
+		return 0;
+
 	return hci_set_event_filter_sync(hdev, HCI_FLT_CLEAR_ALL, 0x00,
 					 BDADDR_ANY, 0x00);
 }
@@ -4422,7 +4435,7 @@ static int hci_disconnect_all_sync(struct hci_dev *hdev, u8 reason)
 			return err;
 	}
 
-	return err;
+	return 0;
 }
 
 /* This function perform power off HCI command sequence as follows:
@@ -4825,6 +4838,12 @@ static int hci_update_event_filter_sync(struct hci_dev *hdev)
 	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
 		return 0;
 
+	/* Some fake CSR controllers lock up after setting this type of
+	 * filter, so avoid sending the request altogether.
+	 */
+	if (test_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks))
+		return 0;
+
 	/* Always clear event filter when starting */
 	hci_clear_event_filter_sync(hdev);
 
@@ -5140,8 +5159,8 @@ static void set_ext_conn_params(struct hci_conn *conn,
 	p->max_ce_len = cpu_to_le16(0x0000);
 }
 
-int hci_le_ext_create_conn_sync(struct hci_dev *hdev, struct hci_conn *conn,
-				u8 own_addr_type)
+static int hci_le_ext_create_conn_sync(struct hci_dev *hdev,
+				       struct hci_conn *conn, u8 own_addr_type)
 {
 	struct hci_cp_le_ext_create_conn *cp;
 	struct hci_cp_le_ext_conn_param *p;
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index e817ff0607a0..ae78490ecd3d 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -1436,6 +1436,7 @@ static void l2cap_ecred_connect(struct l2cap_chan *chan)
 
 	l2cap_ecred_init(chan, 0);
 
+	memset(&data, 0, sizeof(data));
 	data.pdu.req.psm     = chan->psm;
 	data.pdu.req.mtu     = cpu_to_le16(chan->imtu);
 	data.pdu.req.mps     = cpu_to_le16(chan->mps);
@@ -1443,7 +1444,6 @@ static void l2cap_ecred_connect(struct l2cap_chan *chan)
 	data.pdu.scid[0]     = cpu_to_le16(chan->scid);
 
 	chan->ident = l2cap_get_ident(conn);
-	data.pid = chan->ops->get_peer_pid(chan);
 
 	data.count = 1;
 	data.chan = chan;
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 230a7a8196c0..d2d390534e54 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -42,7 +42,7 @@
 #include "aosp.h"
 
 #define MGMT_VERSION	1
-#define MGMT_REVISION	21
+#define MGMT_REVISION	22
 
 static const u16 mgmt_commands[] = {
 	MGMT_OP_READ_INDEX_LIST,
@@ -174,6 +174,8 @@ static const u16 mgmt_events[] = {
 	MGMT_EV_ADV_MONITOR_REMOVED,
 	MGMT_EV_CONTROLLER_SUSPEND,
 	MGMT_EV_CONTROLLER_RESUME,
+	MGMT_EV_ADV_MONITOR_DEVICE_FOUND,
+	MGMT_EV_ADV_MONITOR_DEVICE_LOST,
 };
 
 static const u16 mgmt_untrusted_commands[] = {
@@ -2296,7 +2298,9 @@ static int remove_uuid(struct sock *sk, struct hci_dev *hdev, void *data,
 	struct mgmt_cp_remove_uuid *cp = data;
 	struct mgmt_pending_cmd *cmd;
 	struct bt_uuid *match, *tmp;
-	u8 bt_uuid_any[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+	static const u8 bt_uuid_any[] = {
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+	};
 	int err, found;
 
 	bt_dev_dbg(hdev, "sock %p", sk);
@@ -7951,7 +7955,7 @@ static bool tlv_data_is_valid(struct hci_dev *hdev, u32 adv_flags, u8 *data,
 		return false;
 
 	/* Make sure that the data is correctly formatted. */
-	for (i = 0, cur_len = 0; i < len; i += (cur_len + 1)) {
+	for (i = 0; i < len; i += (cur_len + 1)) {
 		cur_len = data[i];
 
 		if (!cur_len)
@@ -8075,7 +8079,7 @@ static int add_advertising(struct sock *sk, struct hci_dev *hdev,
 	u32 flags;
 	u8 status;
 	u16 timeout, duration;
-	unsigned int prev_instance_cnt = hdev->adv_instance_cnt;
+	unsigned int prev_instance_cnt;
 	u8 schedule_instance = 0;
 	struct adv_info *next_instance;
 	int err;
@@ -8126,6 +8130,8 @@ static int add_advertising(struct sock *sk, struct hci_dev *hdev,
 		goto unlock;
 	}
 
+	prev_instance_cnt = hdev->adv_instance_cnt;
+
 	err = hci_add_adv_instance(hdev, cp->instance, flags,
 				   cp->adv_data_len, cp->data,
 				   cp->scan_rsp_len,
@@ -8628,7 +8634,6 @@ static int get_adv_size_info(struct sock *sk, struct hci_dev *hdev,
 	struct mgmt_cp_get_adv_size_info *cp = data;
 	struct mgmt_rp_get_adv_size_info rp;
 	u32 flags, supported_flags;
-	int err;
 
 	bt_dev_dbg(hdev, "sock %p", sk);
 
@@ -8655,10 +8660,8 @@ static int get_adv_size_info(struct sock *sk, struct hci_dev *hdev,
 	rp.max_adv_data_len = tlv_data_max_len(hdev, flags, true);
 	rp.max_scan_rsp_len = tlv_data_max_len(hdev, flags, false);
 
-	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_ADV_SIZE_INFO,
-				MGMT_STATUS_SUCCESS, &rp, sizeof(rp));
-
-	return err;
+	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_ADV_SIZE_INFO,
+				 MGMT_STATUS_SUCCESS, &rp, sizeof(rp));
 }
 
 static const struct hci_mgmt_handler mgmt_handlers[] = {
@@ -9086,12 +9089,14 @@ void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
 	u16 eir_len = 0;
 	u32 flags = 0;
 
+	/* allocate buff for LE or BR/EDR adv */
 	if (conn->le_adv_data_len > 0)
 		skb = mgmt_alloc_skb(hdev, MGMT_EV_DEVICE_CONNECTED,
-				     conn->le_adv_data_len);
+				     sizeof(*ev) + conn->le_adv_data_len);
 	else
 		skb = mgmt_alloc_skb(hdev, MGMT_EV_DEVICE_CONNECTED,
-				     2 + name_len + 5);
+				     sizeof(*ev) + (name ? eir_precalc_len(name_len) : 0) +
+				     eir_precalc_len(sizeof(conn->dev_class)));
 
 	ev = skb_put(skb, sizeof(*ev));
 	bacpy(&ev->addr.bdaddr, &conn->dst);
@@ -9110,18 +9115,12 @@ void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
 		skb_put_data(skb, conn->le_adv_data, conn->le_adv_data_len);
 		eir_len = conn->le_adv_data_len;
 	} else {
-		if (name_len > 0) {
-			eir_len = eir_append_data(ev->eir, 0, EIR_NAME_COMPLETE,
-						  name, name_len);
-			skb_put(skb, eir_len);
-		}
+		if (name)
+			eir_len += eir_skb_put_data(skb, EIR_NAME_COMPLETE, name, name_len);
 
-		if (memcmp(conn->dev_class, "\0\0\0", 3) != 0) {
-			eir_len = eir_append_data(ev->eir, eir_len,
-						  EIR_CLASS_OF_DEV,
-						  conn->dev_class, 3);
-			skb_put(skb, 5);
-		}
+		if (memcmp(conn->dev_class, "\0\0\0", sizeof(conn->dev_class)))
+			eir_len += eir_skb_put_data(skb, EIR_CLASS_OF_DEV,
+						    conn->dev_class, sizeof(conn->dev_class));
 	}
 
 	ev->eir_len = cpu_to_le16(eir_len);
@@ -9616,12 +9615,120 @@ static bool is_filter_match(struct hci_dev *hdev, s8 rssi, u8 *eir,
 	return true;
 }
 
+void mgmt_adv_monitor_device_lost(struct hci_dev *hdev, u16 handle,
+				  bdaddr_t *bdaddr, u8 addr_type)
+{
+	struct mgmt_ev_adv_monitor_device_lost ev;
+
+	ev.monitor_handle = cpu_to_le16(handle);
+	bacpy(&ev.addr.bdaddr, bdaddr);
+	ev.addr.type = addr_type;
+
+	mgmt_event(MGMT_EV_ADV_MONITOR_DEVICE_LOST, hdev, &ev, sizeof(ev),
+		   NULL);
+}
+
+static void mgmt_send_adv_monitor_device_found(struct hci_dev *hdev,
+					       struct sk_buff *skb,
+					       struct sock *skip_sk,
+					       u16 handle)
+{
+	struct sk_buff *advmon_skb;
+	size_t advmon_skb_len;
+	__le16 *monitor_handle;
+
+	if (!skb)
+		return;
+
+	advmon_skb_len = (sizeof(struct mgmt_ev_adv_monitor_device_found) -
+			  sizeof(struct mgmt_ev_device_found)) + skb->len;
+	advmon_skb = mgmt_alloc_skb(hdev, MGMT_EV_ADV_MONITOR_DEVICE_FOUND,
+				    advmon_skb_len);
+	if (!advmon_skb)
+		return;
+
+	/* ADV_MONITOR_DEVICE_FOUND is similar to DEVICE_FOUND event except
+	 * that it also has 'monitor_handle'. Make a copy of DEVICE_FOUND and
+	 * store monitor_handle of the matched monitor.
+	 */
+	monitor_handle = skb_put(advmon_skb, sizeof(*monitor_handle));
+	*monitor_handle = cpu_to_le16(handle);
+	skb_put_data(advmon_skb, skb->data, skb->len);
+
+	mgmt_event_skb(advmon_skb, skip_sk);
+}
+
+static void mgmt_adv_monitor_device_found(struct hci_dev *hdev,
+					  bdaddr_t *bdaddr, bool report_device,
+					  struct sk_buff *skb,
+					  struct sock *skip_sk)
+{
+	struct monitored_device *dev, *tmp;
+	bool matched = false;
+	bool notified = false;
+
+	/* We have received the Advertisement Report because:
+	 * 1. the kernel has initiated active discovery
+	 * 2. if not, we have pend_le_reports > 0 in which case we are doing
+	 *    passive scanning
+	 * 3. if none of the above is true, we have one or more active
+	 *    Advertisement Monitor
+	 *
+	 * For case 1 and 2, report all advertisements via MGMT_EV_DEVICE_FOUND
+	 * and report ONLY one advertisement per device for the matched Monitor
+	 * via MGMT_EV_ADV_MONITOR_DEVICE_FOUND event.
+	 *
+	 * For case 3, since we are not active scanning and all advertisements
+	 * received are due to a matched Advertisement Monitor, report all
+	 * advertisements ONLY via MGMT_EV_ADV_MONITOR_DEVICE_FOUND event.
+	 */
+	if (report_device && !hdev->advmon_pend_notify) {
+		mgmt_event_skb(skb, skip_sk);
+		return;
+	}
+
+	hdev->advmon_pend_notify = false;
+
+	list_for_each_entry_safe(dev, tmp, &hdev->monitored_devices, list) {
+		if (!bacmp(&dev->bdaddr, bdaddr)) {
+			matched = true;
+
+			if (!dev->notified) {
+				mgmt_send_adv_monitor_device_found(hdev, skb,
+								   skip_sk,
+								   dev->handle);
+				notified = true;
+				dev->notified = true;
+			}
+		}
+
+		if (!dev->notified)
+			hdev->advmon_pend_notify = true;
+	}
+
+	if (!report_device &&
+	    ((matched && !notified) || !msft_monitor_supported(hdev))) {
+		/* Handle 0 indicates that we are not active scanning and this
+		 * is a subsequent advertisement report for an already matched
+		 * Advertisement Monitor or the controller offloading support
+		 * is not available.
+		 */
+		mgmt_send_adv_monitor_device_found(hdev, skb, skip_sk, 0);
+	}
+
+	if (report_device)
+		mgmt_event_skb(skb, skip_sk);
+	else
+		kfree_skb(skb);
+}
+
 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
 		       u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
 		       u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len)
 {
 	struct sk_buff *skb;
 	struct mgmt_ev_device_found *ev;
+	bool report_device = hci_discovery_active(hdev);
 
 	/* Don't send events for a non-kernel initiated discovery. With
 	 * LE one exception is if we have pend_le_reports > 0 in which
@@ -9630,11 +9737,10 @@ void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
 	if (!hci_discovery_active(hdev)) {
 		if (link_type == ACL_LINK)
 			return;
-		if (link_type == LE_LINK &&
-		    list_empty(&hdev->pend_le_reports) &&
-		    !hci_is_adv_monitoring(hdev)) {
+		if (link_type == LE_LINK && !list_empty(&hdev->pend_le_reports))
+			report_device = true;
+		else if (!hci_is_adv_monitoring(hdev))
 			return;
-		}
 	}
 
 	if (hdev->discovery.result_filtering) {
@@ -9699,7 +9805,7 @@ void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
 
 	ev->eir_len = cpu_to_le16(eir_len + scan_rsp_len);
 
-	mgmt_event_skb(skb, NULL);
+	mgmt_adv_monitor_device_found(hdev, bdaddr, report_device, skb, NULL);
 }
 
 void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
@@ -9707,28 +9813,21 @@ void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
 {
 	struct sk_buff *skb;
 	struct mgmt_ev_device_found *ev;
-	u16 eir_len;
-	u32 flags;
+	u16 eir_len = 0;
+	u32 flags = 0;
 
-	if (name_len)
-		skb = mgmt_alloc_skb(hdev, MGMT_EV_DEVICE_FOUND, 2 + name_len);
-	else
-		skb = mgmt_alloc_skb(hdev, MGMT_EV_DEVICE_FOUND, 0);
+	skb = mgmt_alloc_skb(hdev, MGMT_EV_DEVICE_FOUND,
+			     sizeof(*ev) + (name ? eir_precalc_len(name_len) : 0));
 
 	ev = skb_put(skb, sizeof(*ev));
 	bacpy(&ev->addr.bdaddr, bdaddr);
 	ev->addr.type = link_to_bdaddr(link_type, addr_type);
 	ev->rssi = rssi;
 
-	if (name) {
-		eir_len = eir_append_data(ev->eir, 0, EIR_NAME_COMPLETE, name,
-					  name_len);
-		flags = 0;
-		skb_put(skb, eir_len);
-	} else {
-		eir_len = 0;
+	if (name)
+		eir_len += eir_skb_put_data(skb, EIR_NAME_COMPLETE, name, name_len);
+	else
 		flags = MGMT_DEV_FOUND_NAME_REQUEST_FAILED;
-	}
 
 	ev->eir_len = cpu_to_le16(eir_len);
 	ev->flags = cpu_to_le32(flags);
diff --git a/net/bluetooth/msft.c b/net/bluetooth/msft.c
index 6a943634b31a..f43994523b1f 100644
--- a/net/bluetooth/msft.c
+++ b/net/bluetooth/msft.c
@@ -80,6 +80,14 @@ struct msft_rp_le_set_advertisement_filter_enable {
 	__u8 sub_opcode;
 } __packed;
 
+#define MSFT_EV_LE_MONITOR_DEVICE	0x02
+struct msft_ev_le_monitor_device {
+	__u8     addr_type;
+	bdaddr_t bdaddr;
+	__u8     monitor_handle;
+	__u8     monitor_state;
+} __packed;
+
 struct msft_monitor_advertisement_handle_data {
 	__u8  msft_handle;
 	__u16 mgmt_handle;
@@ -204,6 +212,37 @@ static struct msft_monitor_advertisement_handle_data *msft_find_handle_data
 	return NULL;
 }
 
+/* This function requires the caller holds hdev->lock */
+static int msft_monitor_device_del(struct hci_dev *hdev, __u16 mgmt_handle,
+				   bdaddr_t *bdaddr, __u8 addr_type,
+				   bool notify)
+{
+	struct monitored_device *dev, *tmp;
+	int count = 0;
+
+	list_for_each_entry_safe(dev, tmp, &hdev->monitored_devices, list) {
+		/* mgmt_handle == 0 indicates remove all devices, whereas,
+		 * bdaddr == NULL indicates remove all devices matching the
+		 * mgmt_handle.
+		 */
+		if ((!mgmt_handle || dev->handle == mgmt_handle) &&
+		    (!bdaddr || (!bacmp(bdaddr, &dev->bdaddr) &&
+				 addr_type == dev->addr_type))) {
+			if (notify && dev->notified) {
+				mgmt_adv_monitor_device_lost(hdev, dev->handle,
+							     &dev->bdaddr,
+							     dev->addr_type);
+			}
+
+			list_del(&dev->list);
+			kfree(dev);
+			count++;
+		}
+	}
+
+	return count;
+}
+
 static void msft_le_monitor_advertisement_cb(struct hci_dev *hdev,
 					     u8 status, u16 opcode,
 					     struct sk_buff *skb)
@@ -291,9 +330,14 @@ static void msft_le_cancel_monitor_advertisement_cb(struct hci_dev *hdev,
 		/* Do not free the monitor if it is being removed due to
 		 * suspend. It will be re-monitored on resume.
 		 */
-		if (monitor && !msft->suspending)
+		if (monitor && !msft->suspending) {
 			hci_free_adv_monitor(hdev, monitor);
 
+			/* Clear any monitored devices by this Adv Monitor */
+			msft_monitor_device_del(hdev, handle_data->mgmt_handle,
+						NULL, 0, false);
+		}
+
 		list_del(&handle_data->list);
 		kfree(handle_data);
 	}
@@ -479,6 +523,16 @@ int msft_resume_sync(struct hci_dev *hdev)
 	if (!msft || !msft_monitor_supported(hdev))
 		return 0;
 
+	hci_dev_lock(hdev);
+
+	/* Clear already tracked devices on resume. Once the monitors are
+	 * reregistered, devices in range will be found again after resume.
+	 */
+	hdev->advmon_pend_notify = false;
+	msft_monitor_device_del(hdev, 0, NULL, 0, true);
+
+	hci_dev_unlock(hdev);
+
 	msft->resuming = true;
 
 	while (1) {
@@ -557,6 +611,14 @@ void msft_do_close(struct hci_dev *hdev)
 		list_del(&handle_data->list);
 		kfree(handle_data);
 	}
+
+	hci_dev_lock(hdev);
+
+	/* Clear any devices that are being monitored and notify device lost */
+	hdev->advmon_pend_notify = false;
+	msft_monitor_device_del(hdev, 0, NULL, 0, true);
+
+	hci_dev_unlock(hdev);
 }
 
 void msft_register(struct hci_dev *hdev)
@@ -590,10 +652,101 @@ void msft_unregister(struct hci_dev *hdev)
 	kfree(msft);
 }
 
+/* This function requires the caller holds hdev->lock */
+static void msft_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr,
+			      __u8 addr_type, __u16 mgmt_handle)
+{
+	struct monitored_device *dev;
+
+	dev = kmalloc(sizeof(*dev), GFP_KERNEL);
+	if (!dev) {
+		bt_dev_err(hdev, "MSFT vendor event %u: no memory",
+			   MSFT_EV_LE_MONITOR_DEVICE);
+		return;
+	}
+
+	bacpy(&dev->bdaddr, bdaddr);
+	dev->addr_type = addr_type;
+	dev->handle = mgmt_handle;
+	dev->notified = false;
+
+	INIT_LIST_HEAD(&dev->list);
+	list_add(&dev->list, &hdev->monitored_devices);
+	hdev->advmon_pend_notify = true;
+}
+
+/* This function requires the caller holds hdev->lock */
+static void msft_device_lost(struct hci_dev *hdev, bdaddr_t *bdaddr,
+			     __u8 addr_type, __u16 mgmt_handle)
+{
+	if (!msft_monitor_device_del(hdev, mgmt_handle, bdaddr, addr_type,
+				     true)) {
+		bt_dev_err(hdev, "MSFT vendor event %u: dev %pMR not in list",
+			   MSFT_EV_LE_MONITOR_DEVICE, bdaddr);
+	}
+}
+
+static void *msft_skb_pull(struct hci_dev *hdev, struct sk_buff *skb,
+			   u8 ev, size_t len)
+{
+	void *data;
+
+	data = skb_pull_data(skb, len);
+	if (!data)
+		bt_dev_err(hdev, "Malformed MSFT vendor event: 0x%02x", ev);
+
+	return data;
+}
+
+/* This function requires the caller holds hdev->lock */
+static void msft_monitor_device_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct msft_ev_le_monitor_device *ev;
+	struct msft_monitor_advertisement_handle_data *handle_data;
+	u8 addr_type;
+
+	ev = msft_skb_pull(hdev, skb, MSFT_EV_LE_MONITOR_DEVICE, sizeof(*ev));
+	if (!ev)
+		return;
+
+	bt_dev_dbg(hdev,
+		   "MSFT vendor event 0x%02x: handle 0x%04x state %d addr %pMR",
+		   MSFT_EV_LE_MONITOR_DEVICE, ev->monitor_handle,
+		   ev->monitor_state, &ev->bdaddr);
+
+	handle_data = msft_find_handle_data(hdev, ev->monitor_handle, false);
+	if (!handle_data)
+		return;
+
+	switch (ev->addr_type) {
+	case ADDR_LE_DEV_PUBLIC:
+		addr_type = BDADDR_LE_PUBLIC;
+		break;
+
+	case ADDR_LE_DEV_RANDOM:
+		addr_type = BDADDR_LE_RANDOM;
+		break;
+
+	default:
+		bt_dev_err(hdev,
+			   "MSFT vendor event 0x%02x: unknown addr type 0x%02x",
+			   MSFT_EV_LE_MONITOR_DEVICE, ev->addr_type);
+		return;
+	}
+
+	if (ev->monitor_state)
+		msft_device_found(hdev, &ev->bdaddr, addr_type,
+				  handle_data->mgmt_handle);
+	else
+		msft_device_lost(hdev, &ev->bdaddr, addr_type,
+				 handle_data->mgmt_handle);
+}
+
 void msft_vendor_evt(struct hci_dev *hdev, void *data, struct sk_buff *skb)
 {
 	struct msft_data *msft = hdev->msft_data;
-	u8 event;
+	u8 *evt_prefix;
+	u8 *evt;
 
 	if (!msft)
 		return;
@@ -602,13 +755,12 @@ void msft_vendor_evt(struct hci_dev *hdev, void *data, struct sk_buff *skb)
 	 * matches, and otherwise just return.
 	 */
 	if (msft->evt_prefix_len > 0) {
-		if (skb->len < msft->evt_prefix_len)
+		evt_prefix = msft_skb_pull(hdev, skb, 0, msft->evt_prefix_len);
+		if (!evt_prefix)
 			return;
 
-		if (memcmp(skb->data, msft->evt_prefix, msft->evt_prefix_len))
+		if (memcmp(evt_prefix, msft->evt_prefix, msft->evt_prefix_len))
 			return;
-
-		skb_pull(skb, msft->evt_prefix_len);
 	}
 
 	/* Every event starts at least with an event code and the rest of
@@ -617,10 +769,23 @@ void msft_vendor_evt(struct hci_dev *hdev, void *data, struct sk_buff *skb)
 	if (skb->len < 1)
 		return;
 
-	event = *skb->data;
-	skb_pull(skb, 1);
+	evt = msft_skb_pull(hdev, skb, 0, sizeof(*evt));
+	if (!evt)
+		return;
+
+	hci_dev_lock(hdev);
 
-	bt_dev_dbg(hdev, "MSFT vendor event %u", event);
+	switch (*evt) {
+	case MSFT_EV_LE_MONITOR_DEVICE:
+		msft_monitor_device_evt(hdev, skb);
+		break;
+
+	default:
+		bt_dev_dbg(hdev, "MSFT vendor event 0x%02x", *evt);
+		break;
+	}
+
+	hci_dev_unlock(hdev);
 }
 
 __u64 msft_get_features(struct hci_dev *hdev)
diff --git a/net/bpf/bpf_dummy_struct_ops.c b/net/bpf/bpf_dummy_struct_ops.c
index fbc896323bec..d0e54e30658a 100644
--- a/net/bpf/bpf_dummy_struct_ops.c
+++ b/net/bpf/bpf_dummy_struct_ops.c
@@ -145,7 +145,8 @@ static int bpf_dummy_ops_btf_struct_access(struct bpf_verifier_log *log,
 					   const struct btf *btf,
 					   const struct btf_type *t, int off,
 					   int size, enum bpf_access_type atype,
-					   u32 *next_btf_id)
+					   u32 *next_btf_id,
+					   enum bpf_type_flag *flag)
 {
 	const struct btf_type *state;
 	s32 type_id;
@@ -162,7 +163,8 @@ static int bpf_dummy_ops_btf_struct_access(struct bpf_verifier_log *log,
 		return -EACCES;
 	}
 
-	err = btf_struct_access(log, btf, t, off, size, atype, next_btf_id);
+	err = btf_struct_access(log, btf, t, off, size, atype, next_btf_id,
+				flag);
 	if (err < 0)
 		return err;
 
diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c
index 46dd95755967..e7b9c2636d10 100644
--- a/net/bpf/test_run.c
+++ b/net/bpf/test_run.c
@@ -5,6 +5,7 @@
 #include <linux/btf.h>
 #include <linux/btf_ids.h>
 #include <linux/slab.h>
+#include <linux/init.h>
 #include <linux/vmalloc.h>
 #include <linux/etherdevice.h>
 #include <linux/filter.h>
@@ -14,6 +15,7 @@
 #include <net/sock.h>
 #include <net/tcp.h>
 #include <net/net_namespace.h>
+#include <net/page_pool.h>
 #include <linux/error-injection.h>
 #include <linux/smp.h>
 #include <linux/sock_diag.h>
@@ -52,10 +54,11 @@ static void bpf_test_timer_leave(struct bpf_test_timer *t)
 	rcu_read_unlock();
 }
 
-static bool bpf_test_timer_continue(struct bpf_test_timer *t, u32 repeat, int *err, u32 *duration)
+static bool bpf_test_timer_continue(struct bpf_test_timer *t, int iterations,
+				    u32 repeat, int *err, u32 *duration)
 	__must_hold(rcu)
 {
-	t->i++;
+	t->i += iterations;
 	if (t->i >= repeat) {
 		/* We're done. */
 		t->time_spent += ktime_get_ns() - t->time_start;
@@ -87,6 +90,284 @@ reset:
 	return false;
 }
 
+/* We put this struct at the head of each page with a context and frame
+ * initialised when the page is allocated, so we don't have to do this on each
+ * repetition of the test run.
+ */
+struct xdp_page_head {
+	struct xdp_buff orig_ctx;
+	struct xdp_buff ctx;
+	struct xdp_frame frm;
+	u8 data[];
+};
+
+struct xdp_test_data {
+	struct xdp_buff *orig_ctx;
+	struct xdp_rxq_info rxq;
+	struct net_device *dev;
+	struct page_pool *pp;
+	struct xdp_frame **frames;
+	struct sk_buff **skbs;
+	u32 batch_size;
+	u32 frame_cnt;
+};
+
+#define TEST_XDP_FRAME_SIZE (PAGE_SIZE - sizeof(struct xdp_page_head))
+#define TEST_XDP_MAX_BATCH 256
+
+static void xdp_test_run_init_page(struct page *page, void *arg)
+{
+	struct xdp_page_head *head = phys_to_virt(page_to_phys(page));
+	struct xdp_buff *new_ctx, *orig_ctx;
+	u32 headroom = XDP_PACKET_HEADROOM;
+	struct xdp_test_data *xdp = arg;
+	size_t frm_len, meta_len;
+	struct xdp_frame *frm;
+	void *data;
+
+	orig_ctx = xdp->orig_ctx;
+	frm_len = orig_ctx->data_end - orig_ctx->data_meta;
+	meta_len = orig_ctx->data - orig_ctx->data_meta;
+	headroom -= meta_len;
+
+	new_ctx = &head->ctx;
+	frm = &head->frm;
+	data = &head->data;
+	memcpy(data + headroom, orig_ctx->data_meta, frm_len);
+
+	xdp_init_buff(new_ctx, TEST_XDP_FRAME_SIZE, &xdp->rxq);
+	xdp_prepare_buff(new_ctx, data, headroom, frm_len, true);
+	new_ctx->data = new_ctx->data_meta + meta_len;
+
+	xdp_update_frame_from_buff(new_ctx, frm);
+	frm->mem = new_ctx->rxq->mem;
+
+	memcpy(&head->orig_ctx, new_ctx, sizeof(head->orig_ctx));
+}
+
+static int xdp_test_run_setup(struct xdp_test_data *xdp, struct xdp_buff *orig_ctx)
+{
+	struct xdp_mem_info mem = {};
+	struct page_pool *pp;
+	int err = -ENOMEM;
+	struct page_pool_params pp_params = {
+		.order = 0,
+		.flags = 0,
+		.pool_size = xdp->batch_size,
+		.nid = NUMA_NO_NODE,
+		.init_callback = xdp_test_run_init_page,
+		.init_arg = xdp,
+	};
+
+	xdp->frames = kvmalloc_array(xdp->batch_size, sizeof(void *), GFP_KERNEL);
+	if (!xdp->frames)
+		return -ENOMEM;
+
+	xdp->skbs = kvmalloc_array(xdp->batch_size, sizeof(void *), GFP_KERNEL);
+	if (!xdp->skbs)
+		goto err_skbs;
+
+	pp = page_pool_create(&pp_params);
+	if (IS_ERR(pp)) {
+		err = PTR_ERR(pp);
+		goto err_pp;
+	}
+
+	/* will copy 'mem.id' into pp->xdp_mem_id */
+	err = xdp_reg_mem_model(&mem, MEM_TYPE_PAGE_POOL, pp);
+	if (err)
+		goto err_mmodel;
+
+	xdp->pp = pp;
+
+	/* We create a 'fake' RXQ referencing the original dev, but with an
+	 * xdp_mem_info pointing to our page_pool
+	 */
+	xdp_rxq_info_reg(&xdp->rxq, orig_ctx->rxq->dev, 0, 0);
+	xdp->rxq.mem.type = MEM_TYPE_PAGE_POOL;
+	xdp->rxq.mem.id = pp->xdp_mem_id;
+	xdp->dev = orig_ctx->rxq->dev;
+	xdp->orig_ctx = orig_ctx;
+
+	return 0;
+
+err_mmodel:
+	page_pool_destroy(pp);
+err_pp:
+	kvfree(xdp->skbs);
+err_skbs:
+	kvfree(xdp->frames);
+	return err;
+}
+
+static void xdp_test_run_teardown(struct xdp_test_data *xdp)
+{
+	page_pool_destroy(xdp->pp);
+	kfree(xdp->frames);
+	kfree(xdp->skbs);
+}
+
+static bool ctx_was_changed(struct xdp_page_head *head)
+{
+	return head->orig_ctx.data != head->ctx.data ||
+		head->orig_ctx.data_meta != head->ctx.data_meta ||
+		head->orig_ctx.data_end != head->ctx.data_end;
+}
+
+static void reset_ctx(struct xdp_page_head *head)
+{
+	if (likely(!ctx_was_changed(head)))
+		return;
+
+	head->ctx.data = head->orig_ctx.data;
+	head->ctx.data_meta = head->orig_ctx.data_meta;
+	head->ctx.data_end = head->orig_ctx.data_end;
+	xdp_update_frame_from_buff(&head->ctx, &head->frm);
+}
+
+static int xdp_recv_frames(struct xdp_frame **frames, int nframes,
+			   struct sk_buff **skbs,
+			   struct net_device *dev)
+{
+	gfp_t gfp = __GFP_ZERO | GFP_ATOMIC;
+	int i, n;
+	LIST_HEAD(list);
+
+	n = kmem_cache_alloc_bulk(skbuff_head_cache, gfp, nframes, (void **)skbs);
+	if (unlikely(n == 0)) {
+		for (i = 0; i < nframes; i++)
+			xdp_return_frame(frames[i]);
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < nframes; i++) {
+		struct xdp_frame *xdpf = frames[i];
+		struct sk_buff *skb = skbs[i];
+
+		skb = __xdp_build_skb_from_frame(xdpf, skb, dev);
+		if (!skb) {
+			xdp_return_frame(xdpf);
+			continue;
+		}
+
+		list_add_tail(&skb->list, &list);
+	}
+	netif_receive_skb_list(&list);
+
+	return 0;
+}
+
+static int xdp_test_run_batch(struct xdp_test_data *xdp, struct bpf_prog *prog,
+			      u32 repeat)
+{
+	struct bpf_redirect_info *ri = this_cpu_ptr(&bpf_redirect_info);
+	int err = 0, act, ret, i, nframes = 0, batch_sz;
+	struct xdp_frame **frames = xdp->frames;
+	struct xdp_page_head *head;
+	struct xdp_frame *frm;
+	bool redirect = false;
+	struct xdp_buff *ctx;
+	struct page *page;
+
+	batch_sz = min_t(u32, repeat, xdp->batch_size);
+
+	local_bh_disable();
+	xdp_set_return_frame_no_direct();
+
+	for (i = 0; i < batch_sz; i++) {
+		page = page_pool_dev_alloc_pages(xdp->pp);
+		if (!page) {
+			err = -ENOMEM;
+			goto out;
+		}
+
+		head = phys_to_virt(page_to_phys(page));
+		reset_ctx(head);
+		ctx = &head->ctx;
+		frm = &head->frm;
+		xdp->frame_cnt++;
+
+		act = bpf_prog_run_xdp(prog, ctx);
+
+		/* if program changed pkt bounds we need to update the xdp_frame */
+		if (unlikely(ctx_was_changed(head))) {
+			ret = xdp_update_frame_from_buff(ctx, frm);
+			if (ret) {
+				xdp_return_buff(ctx);
+				continue;
+			}
+		}
+
+		switch (act) {
+		case XDP_TX:
+			/* we can't do a real XDP_TX since we're not in the
+			 * driver, so turn it into a REDIRECT back to the same
+			 * index
+			 */
+			ri->tgt_index = xdp->dev->ifindex;
+			ri->map_id = INT_MAX;
+			ri->map_type = BPF_MAP_TYPE_UNSPEC;
+			fallthrough;
+		case XDP_REDIRECT:
+			redirect = true;
+			ret = xdp_do_redirect_frame(xdp->dev, ctx, frm, prog);
+			if (ret)
+				xdp_return_buff(ctx);
+			break;
+		case XDP_PASS:
+			frames[nframes++] = frm;
+			break;
+		default:
+			bpf_warn_invalid_xdp_action(NULL, prog, act);
+			fallthrough;
+		case XDP_DROP:
+			xdp_return_buff(ctx);
+			break;
+		}
+	}
+
+out:
+	if (redirect)
+		xdp_do_flush();
+	if (nframes) {
+		ret = xdp_recv_frames(frames, nframes, xdp->skbs, xdp->dev);
+		if (ret)
+			err = ret;
+	}
+
+	xdp_clear_return_frame_no_direct();
+	local_bh_enable();
+	return err;
+}
+
+static int bpf_test_run_xdp_live(struct bpf_prog *prog, struct xdp_buff *ctx,
+				 u32 repeat, u32 batch_size, u32 *time)
+
+{
+	struct xdp_test_data xdp = { .batch_size = batch_size };
+	struct bpf_test_timer t = { .mode = NO_MIGRATE };
+	int ret;
+
+	if (!repeat)
+		repeat = 1;
+
+	ret = xdp_test_run_setup(&xdp, ctx);
+	if (ret)
+		return ret;
+
+	bpf_test_timer_enter(&t);
+	do {
+		xdp.frame_cnt = 0;
+		ret = xdp_test_run_batch(&xdp, prog, repeat - t.i);
+		if (unlikely(ret < 0))
+			break;
+	} while (bpf_test_timer_continue(&t, xdp.frame_cnt, repeat, &ret, time));
+	bpf_test_timer_leave(&t);
+
+	xdp_test_run_teardown(&xdp);
+	return ret;
+}
+
 static int bpf_test_run(struct bpf_prog *prog, void *ctx, u32 repeat,
 			u32 *retval, u32 *time, bool xdp)
 {
@@ -118,7 +399,7 @@ static int bpf_test_run(struct bpf_prog *prog, void *ctx, u32 repeat,
 			*retval = bpf_prog_run_xdp(prog, ctx);
 		else
 			*retval = bpf_prog_run(prog, ctx);
-	} while (bpf_test_timer_continue(&t, repeat, &ret, time));
+	} while (bpf_test_timer_continue(&t, 1, repeat, &ret, time));
 	bpf_reset_run_ctx(old_ctx);
 	bpf_test_timer_leave(&t);
 
@@ -130,7 +411,8 @@ static int bpf_test_run(struct bpf_prog *prog, void *ctx, u32 repeat,
 
 static int bpf_test_finish(const union bpf_attr *kattr,
 			   union bpf_attr __user *uattr, const void *data,
-			   u32 size, u32 retval, u32 duration)
+			   struct skb_shared_info *sinfo, u32 size,
+			   u32 retval, u32 duration)
 {
 	void __user *data_out = u64_to_user_ptr(kattr->test.data_out);
 	int err = -EFAULT;
@@ -145,8 +427,42 @@ static int bpf_test_finish(const union bpf_attr *kattr,
 		err = -ENOSPC;
 	}
 
-	if (data_out && copy_to_user(data_out, data, copy_size))
-		goto out;
+	if (data_out) {
+		int len = sinfo ? copy_size - sinfo->xdp_frags_size : copy_size;
+
+		if (len < 0) {
+			err = -ENOSPC;
+			goto out;
+		}
+
+		if (copy_to_user(data_out, data, len))
+			goto out;
+
+		if (sinfo) {
+			int i, offset = len;
+			u32 data_len;
+
+			for (i = 0; i < sinfo->nr_frags; i++) {
+				skb_frag_t *frag = &sinfo->frags[i];
+
+				if (offset >= copy_size) {
+					err = -ENOSPC;
+					break;
+				}
+
+				data_len = min_t(u32, copy_size - offset,
+						 skb_frag_size(frag));
+
+				if (copy_to_user(data_out + offset,
+						 skb_frag_address(frag),
+						 data_len))
+					goto out;
+
+				offset += data_len;
+			}
+		}
+	}
+
 	if (copy_to_user(&uattr->test.data_size_out, &size, sizeof(size)))
 		goto out;
 	if (copy_to_user(&uattr->test.retval, &retval, sizeof(retval)))
@@ -165,12 +481,14 @@ out:
  * future.
  */
 __diag_push();
-__diag_ignore(GCC, 8, "-Wmissing-prototypes",
-	      "Global functions as their definitions will be in vmlinux BTF");
+__diag_ignore_all("-Wmissing-prototypes",
+		  "Global functions as their definitions will be in vmlinux BTF");
 int noinline bpf_fentry_test1(int a)
 {
 	return a + 1;
 }
+EXPORT_SYMBOL_GPL(bpf_fentry_test1);
+ALLOW_ERROR_INJECTION(bpf_fentry_test1, ERRNO);
 
 int noinline bpf_fentry_test2(int a, u64 b)
 {
@@ -232,28 +550,153 @@ struct sock * noinline bpf_kfunc_call_test3(struct sock *sk)
 	return sk;
 }
 
+struct prog_test_member {
+	u64 c;
+};
+
+struct prog_test_ref_kfunc {
+	int a;
+	int b;
+	struct prog_test_member memb;
+	struct prog_test_ref_kfunc *next;
+};
+
+static struct prog_test_ref_kfunc prog_test_struct = {
+	.a = 42,
+	.b = 108,
+	.next = &prog_test_struct,
+};
+
+noinline struct prog_test_ref_kfunc *
+bpf_kfunc_call_test_acquire(unsigned long *scalar_ptr)
+{
+	/* randomly return NULL */
+	if (get_jiffies_64() % 2)
+		return NULL;
+	return &prog_test_struct;
+}
+
+noinline void bpf_kfunc_call_test_release(struct prog_test_ref_kfunc *p)
+{
+}
+
+noinline void bpf_kfunc_call_memb_release(struct prog_test_member *p)
+{
+}
+
+struct prog_test_pass1 {
+	int x0;
+	struct {
+		int x1;
+		struct {
+			int x2;
+			struct {
+				int x3;
+			};
+		};
+	};
+};
+
+struct prog_test_pass2 {
+	int len;
+	short arr1[4];
+	struct {
+		char arr2[4];
+		unsigned long arr3[8];
+	} x;
+};
+
+struct prog_test_fail1 {
+	void *p;
+	int x;
+};
+
+struct prog_test_fail2 {
+	int x8;
+	struct prog_test_pass1 x;
+};
+
+struct prog_test_fail3 {
+	int len;
+	char arr1[2];
+	char arr2[];
+};
+
+noinline void bpf_kfunc_call_test_pass_ctx(struct __sk_buff *skb)
+{
+}
+
+noinline void bpf_kfunc_call_test_pass1(struct prog_test_pass1 *p)
+{
+}
+
+noinline void bpf_kfunc_call_test_pass2(struct prog_test_pass2 *p)
+{
+}
+
+noinline void bpf_kfunc_call_test_fail1(struct prog_test_fail1 *p)
+{
+}
+
+noinline void bpf_kfunc_call_test_fail2(struct prog_test_fail2 *p)
+{
+}
+
+noinline void bpf_kfunc_call_test_fail3(struct prog_test_fail3 *p)
+{
+}
+
+noinline void bpf_kfunc_call_test_mem_len_pass1(void *mem, int mem__sz)
+{
+}
+
+noinline void bpf_kfunc_call_test_mem_len_fail1(void *mem, int len)
+{
+}
+
+noinline void bpf_kfunc_call_test_mem_len_fail2(u64 *mem, int len)
+{
+}
+
 __diag_pop();
 
 ALLOW_ERROR_INJECTION(bpf_modify_return_test, ERRNO);
 
-BTF_SET_START(test_sk_kfunc_ids)
+BTF_SET_START(test_sk_check_kfunc_ids)
 BTF_ID(func, bpf_kfunc_call_test1)
 BTF_ID(func, bpf_kfunc_call_test2)
 BTF_ID(func, bpf_kfunc_call_test3)
-BTF_SET_END(test_sk_kfunc_ids)
-
-bool bpf_prog_test_check_kfunc_call(u32 kfunc_id, struct module *owner)
-{
-	if (btf_id_set_contains(&test_sk_kfunc_ids, kfunc_id))
-		return true;
-	return bpf_check_mod_kfunc_call(&prog_test_kfunc_list, kfunc_id, owner);
-}
-
-static void *bpf_test_init(const union bpf_attr *kattr, u32 size,
-			   u32 headroom, u32 tailroom)
+BTF_ID(func, bpf_kfunc_call_test_acquire)
+BTF_ID(func, bpf_kfunc_call_test_release)
+BTF_ID(func, bpf_kfunc_call_memb_release)
+BTF_ID(func, bpf_kfunc_call_test_pass_ctx)
+BTF_ID(func, bpf_kfunc_call_test_pass1)
+BTF_ID(func, bpf_kfunc_call_test_pass2)
+BTF_ID(func, bpf_kfunc_call_test_fail1)
+BTF_ID(func, bpf_kfunc_call_test_fail2)
+BTF_ID(func, bpf_kfunc_call_test_fail3)
+BTF_ID(func, bpf_kfunc_call_test_mem_len_pass1)
+BTF_ID(func, bpf_kfunc_call_test_mem_len_fail1)
+BTF_ID(func, bpf_kfunc_call_test_mem_len_fail2)
+BTF_SET_END(test_sk_check_kfunc_ids)
+
+BTF_SET_START(test_sk_acquire_kfunc_ids)
+BTF_ID(func, bpf_kfunc_call_test_acquire)
+BTF_SET_END(test_sk_acquire_kfunc_ids)
+
+BTF_SET_START(test_sk_release_kfunc_ids)
+BTF_ID(func, bpf_kfunc_call_test_release)
+BTF_ID(func, bpf_kfunc_call_memb_release)
+BTF_SET_END(test_sk_release_kfunc_ids)
+
+BTF_SET_START(test_sk_ret_null_kfunc_ids)
+BTF_ID(func, bpf_kfunc_call_test_acquire)
+BTF_SET_END(test_sk_ret_null_kfunc_ids)
+
+static void *bpf_test_init(const union bpf_attr *kattr, u32 user_size,
+			   u32 size, u32 headroom, u32 tailroom)
 {
 	void __user *data_in = u64_to_user_ptr(kattr->test.data_in);
-	u32 user_size = kattr->test.data_size_in;
 	void *data;
 
 	if (size < ETH_HLEN || size > PAGE_SIZE - headroom - tailroom)
@@ -283,7 +726,7 @@ int bpf_prog_test_run_tracing(struct bpf_prog *prog,
 	int b = 2, err = -EFAULT;
 	u32 retval = 0;
 
-	if (kattr->test.flags || kattr->test.cpu)
+	if (kattr->test.flags || kattr->test.cpu || kattr->test.batch_size)
 		return -EINVAL;
 
 	switch (prog->expected_attach_type) {
@@ -347,7 +790,7 @@ int bpf_prog_test_run_raw_tp(struct bpf_prog *prog,
 	/* doesn't support data_in/out, ctx_out, duration, or repeat */
 	if (kattr->test.data_in || kattr->test.data_out ||
 	    kattr->test.ctx_out || kattr->test.duration ||
-	    kattr->test.repeat)
+	    kattr->test.repeat || kattr->test.batch_size)
 		return -EINVAL;
 
 	if (ctx_size_in < prog->aux->max_ctx_offset ||
@@ -578,10 +1021,11 @@ int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
 	void *data;
 	int ret;
 
-	if (kattr->test.flags || kattr->test.cpu)
+	if (kattr->test.flags || kattr->test.cpu || kattr->test.batch_size)
 		return -EINVAL;
 
-	data = bpf_test_init(kattr, size, NET_SKB_PAD + NET_IP_ALIGN,
+	data = bpf_test_init(kattr, kattr->test.data_size_in,
+			     size, NET_SKB_PAD + NET_IP_ALIGN,
 			     SKB_DATA_ALIGN(sizeof(struct skb_shared_info)));
 	if (IS_ERR(data))
 		return PTR_ERR(data);
@@ -683,7 +1127,8 @@ int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
 	/* bpf program can never convert linear skb to non-linear */
 	if (WARN_ON_ONCE(skb_is_nonlinear(skb)))
 		size = skb_headlen(skb);
-	ret = bpf_test_finish(kattr, uattr, skb->data, size, retval, duration);
+	ret = bpf_test_finish(kattr, uattr, skb->data, NULL, size, retval,
+			      duration);
 	if (!ret)
 		ret = bpf_ctx_finish(kattr, uattr, ctx,
 				     sizeof(struct __sk_buff));
@@ -757,22 +1202,38 @@ static void xdp_convert_buff_to_md(struct xdp_buff *xdp, struct xdp_md *xdp_md)
 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
 			  union bpf_attr __user *uattr)
 {
+	bool do_live = (kattr->test.flags & BPF_F_TEST_XDP_LIVE_FRAMES);
 	u32 tailroom = SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
-	u32 headroom = XDP_PACKET_HEADROOM;
+	u32 batch_size = kattr->test.batch_size;
+	u32 retval = 0, duration, max_data_sz;
 	u32 size = kattr->test.data_size_in;
+	u32 headroom = XDP_PACKET_HEADROOM;
 	u32 repeat = kattr->test.repeat;
 	struct netdev_rx_queue *rxqueue;
+	struct skb_shared_info *sinfo;
 	struct xdp_buff xdp = {};
-	u32 retval, duration;
+	int i, ret = -EINVAL;
 	struct xdp_md *ctx;
-	u32 max_data_sz;
 	void *data;
-	int ret = -EINVAL;
 
 	if (prog->expected_attach_type == BPF_XDP_DEVMAP ||
 	    prog->expected_attach_type == BPF_XDP_CPUMAP)
 		return -EINVAL;
 
+	if (kattr->test.flags & ~BPF_F_TEST_XDP_LIVE_FRAMES)
+		return -EINVAL;
+
+	if (do_live) {
+		if (!batch_size)
+			batch_size = NAPI_POLL_WEIGHT;
+		else if (batch_size > TEST_XDP_MAX_BATCH)
+			return -E2BIG;
+
+		headroom += sizeof(struct xdp_page_head);
+	} else if (batch_size) {
+		return -EINVAL;
+	}
+
 	ctx = bpf_ctx_init(kattr, sizeof(struct xdp_md));
 	if (IS_ERR(ctx))
 		return PTR_ERR(ctx);
@@ -781,33 +1242,81 @@ int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
 		/* There can't be user provided data before the meta data */
 		if (ctx->data_meta || ctx->data_end != size ||
 		    ctx->data > ctx->data_end ||
-		    unlikely(xdp_metalen_invalid(ctx->data)))
+		    unlikely(xdp_metalen_invalid(ctx->data)) ||
+		    (do_live && (kattr->test.data_out || kattr->test.ctx_out)))
 			goto free_ctx;
 		/* Meta data is allocated from the headroom */
 		headroom -= ctx->data;
 	}
 
-	/* XDP have extra tailroom as (most) drivers use full page */
 	max_data_sz = 4096 - headroom - tailroom;
+	if (size > max_data_sz) {
+		/* disallow live data mode for jumbo frames */
+		if (do_live)
+			goto free_ctx;
+		size = max_data_sz;
+	}
 
-	data = bpf_test_init(kattr, max_data_sz, headroom, tailroom);
+	data = bpf_test_init(kattr, size, max_data_sz, headroom, tailroom);
 	if (IS_ERR(data)) {
 		ret = PTR_ERR(data);
 		goto free_ctx;
 	}
 
 	rxqueue = __netif_get_rx_queue(current->nsproxy->net_ns->loopback_dev, 0);
-	xdp_init_buff(&xdp, headroom + max_data_sz + tailroom,
-		      &rxqueue->xdp_rxq);
+	rxqueue->xdp_rxq.frag_size = headroom + max_data_sz + tailroom;
+	xdp_init_buff(&xdp, rxqueue->xdp_rxq.frag_size, &rxqueue->xdp_rxq);
 	xdp_prepare_buff(&xdp, data, headroom, size, true);
+	sinfo = xdp_get_shared_info_from_buff(&xdp);
 
 	ret = xdp_convert_md_to_buff(ctx, &xdp);
 	if (ret)
 		goto free_data;
 
+	if (unlikely(kattr->test.data_size_in > size)) {
+		void __user *data_in = u64_to_user_ptr(kattr->test.data_in);
+
+		while (size < kattr->test.data_size_in) {
+			struct page *page;
+			skb_frag_t *frag;
+			u32 data_len;
+
+			if (sinfo->nr_frags == MAX_SKB_FRAGS) {
+				ret = -ENOMEM;
+				goto out;
+			}
+
+			page = alloc_page(GFP_KERNEL);
+			if (!page) {
+				ret = -ENOMEM;
+				goto out;
+			}
+
+			frag = &sinfo->frags[sinfo->nr_frags++];
+			__skb_frag_set_page(frag, page);
+
+			data_len = min_t(u32, kattr->test.data_size_in - size,
+					 PAGE_SIZE);
+			skb_frag_size_set(frag, data_len);
+
+			if (copy_from_user(page_address(page), data_in + size,
+					   data_len)) {
+				ret = -EFAULT;
+				goto out;
+			}
+			sinfo->xdp_frags_size += data_len;
+			size += data_len;
+		}
+		xdp_buff_set_frags_flag(&xdp);
+	}
+
 	if (repeat > 1)
 		bpf_prog_change_xdp(NULL, prog);
-	ret = bpf_test_run(prog, &xdp, repeat, &retval, &duration, true);
+
+	if (do_live)
+		ret = bpf_test_run_xdp_live(prog, &xdp, repeat, batch_size, &duration);
+	else
+		ret = bpf_test_run(prog, &xdp, repeat, &retval, &duration, true);
 	/* We convert the xdp_buff back to an xdp_md before checking the return
 	 * code so the reference count of any held netdevice will be decremented
 	 * even if the test run failed.
@@ -816,12 +1325,9 @@ int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
 	if (ret)
 		goto out;
 
-	if (xdp.data_meta != data + headroom ||
-	    xdp.data_end != xdp.data_meta + size)
-		size = xdp.data_end - xdp.data_meta;
-
-	ret = bpf_test_finish(kattr, uattr, xdp.data_meta, size, retval,
-			      duration);
+	size = xdp.data_end - xdp.data_meta + sinfo->xdp_frags_size;
+	ret = bpf_test_finish(kattr, uattr, xdp.data_meta, sinfo, size,
+			      retval, duration);
 	if (!ret)
 		ret = bpf_ctx_finish(kattr, uattr, ctx,
 				     sizeof(struct xdp_md));
@@ -830,6 +1336,8 @@ out:
 	if (repeat > 1)
 		bpf_prog_change_xdp(prog, NULL);
 free_data:
+	for (i = 0; i < sinfo->nr_frags; i++)
+		__free_page(skb_frag_page(&sinfo->frags[i]));
 	kfree(data);
 free_ctx:
 	kfree(ctx);
@@ -870,13 +1378,13 @@ int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
 	if (prog->type != BPF_PROG_TYPE_FLOW_DISSECTOR)
 		return -EINVAL;
 
-	if (kattr->test.flags || kattr->test.cpu)
+	if (kattr->test.flags || kattr->test.cpu || kattr->test.batch_size)
 		return -EINVAL;
 
 	if (size < ETH_HLEN)
 		return -EINVAL;
 
-	data = bpf_test_init(kattr, size, 0, 0);
+	data = bpf_test_init(kattr, kattr->test.data_size_in, size, 0, 0);
 	if (IS_ERR(data))
 		return PTR_ERR(data);
 
@@ -905,14 +1413,14 @@ int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
 	do {
 		retval = bpf_flow_dissect(prog, &ctx, eth->h_proto, ETH_HLEN,
 					  size, flags);
-	} while (bpf_test_timer_continue(&t, repeat, &ret, &duration));
+	} while (bpf_test_timer_continue(&t, 1, repeat, &ret, &duration));
 	bpf_test_timer_leave(&t);
 
 	if (ret < 0)
 		goto out;
 
-	ret = bpf_test_finish(kattr, uattr, &flow_keys, sizeof(flow_keys),
-			      retval, duration);
+	ret = bpf_test_finish(kattr, uattr, &flow_keys, NULL,
+			      sizeof(flow_keys), retval, duration);
 	if (!ret)
 		ret = bpf_ctx_finish(kattr, uattr, user_ctx,
 				     sizeof(struct bpf_flow_keys));
@@ -937,7 +1445,7 @@ int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog, const union bpf_attr *kat
 	if (prog->type != BPF_PROG_TYPE_SK_LOOKUP)
 		return -EINVAL;
 
-	if (kattr->test.flags || kattr->test.cpu)
+	if (kattr->test.flags || kattr->test.cpu || kattr->test.batch_size)
 		return -EINVAL;
 
 	if (kattr->test.data_in || kattr->test.data_size_in || kattr->test.data_out ||
@@ -960,7 +1468,7 @@ int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog, const union bpf_attr *kat
 	if (!range_is_zero(user_ctx, offsetofend(typeof(*user_ctx), local_port), sizeof(*user_ctx)))
 		goto out;
 
-	if (user_ctx->local_port > U16_MAX || user_ctx->remote_port > U16_MAX) {
+	if (user_ctx->local_port > U16_MAX) {
 		ret = -ERANGE;
 		goto out;
 	}
@@ -968,7 +1476,7 @@ int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog, const union bpf_attr *kat
 	ctx.family = (u16)user_ctx->family;
 	ctx.protocol = (u16)user_ctx->protocol;
 	ctx.dport = (u16)user_ctx->local_port;
-	ctx.sport = (__force __be16)user_ctx->remote_port;
+	ctx.sport = user_ctx->remote_port;
 
 	switch (ctx.family) {
 	case AF_INET:
@@ -1000,7 +1508,7 @@ int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog, const union bpf_attr *kat
 	do {
 		ctx.selected_sk = NULL;
 		retval = BPF_PROG_SK_LOOKUP_RUN_ARRAY(progs, ctx, bpf_prog_run);
-	} while (bpf_test_timer_continue(&t, repeat, &ret, &duration));
+	} while (bpf_test_timer_continue(&t, 1, repeat, &ret, &duration));
 	bpf_test_timer_leave(&t);
 
 	if (ret < 0)
@@ -1016,7 +1524,7 @@ int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog, const union bpf_attr *kat
 		user_ctx->cookie = sock_gen_cookie(ctx.selected_sk);
 	}
 
-	ret = bpf_test_finish(kattr, uattr, NULL, 0, retval, duration);
+	ret = bpf_test_finish(kattr, uattr, NULL, NULL, 0, retval, duration);
 	if (!ret)
 		ret = bpf_ctx_finish(kattr, uattr, user_ctx, sizeof(*user_ctx));
 
@@ -1039,7 +1547,8 @@ int bpf_prog_test_run_syscall(struct bpf_prog *prog,
 	/* doesn't support data_in/out, ctx_out, duration, or repeat or flags */
 	if (kattr->test.data_in || kattr->test.data_out ||
 	    kattr->test.ctx_out || kattr->test.duration ||
-	    kattr->test.repeat || kattr->test.flags)
+	    kattr->test.repeat || kattr->test.flags ||
+	    kattr->test.batch_size)
 		return -EINVAL;
 
 	if (ctx_size_in < prog->aux->max_ctx_offset ||
@@ -1067,3 +1576,17 @@ out:
 	kfree(ctx);
 	return err;
 }
+
+static const struct btf_kfunc_id_set bpf_prog_test_kfunc_set = {
+	.owner        = THIS_MODULE,
+	.check_set    = &test_sk_check_kfunc_ids,
+	.acquire_set  = &test_sk_acquire_kfunc_ids,
+	.release_set  = &test_sk_release_kfunc_ids,
+	.ret_null_set = &test_sk_ret_null_kfunc_ids,
+};
+
+static int __init bpf_prog_test_run_init(void)
+{
+	return register_btf_kfunc_id_set(BPF_PROG_TYPE_SCHED_CLS, &bpf_prog_test_kfunc_set);
+}
+late_initcall(bpf_prog_test_run_init);
diff --git a/net/bridge/Makefile b/net/bridge/Makefile
index 7fb9a021873b..24bd1c0a9a5a 100644
--- a/net/bridge/Makefile
+++ b/net/bridge/Makefile
@@ -20,7 +20,7 @@ obj-$(CONFIG_BRIDGE_NETFILTER) += br_netfilter.o
 
 bridge-$(CONFIG_BRIDGE_IGMP_SNOOPING) += br_multicast.o br_mdb.o br_multicast_eht.o
 
-bridge-$(CONFIG_BRIDGE_VLAN_FILTERING) += br_vlan.o br_vlan_tunnel.o br_vlan_options.o
+bridge-$(CONFIG_BRIDGE_VLAN_FILTERING) += br_vlan.o br_vlan_tunnel.o br_vlan_options.o br_mst.o
 
 bridge-$(CONFIG_NET_SWITCHDEV) += br_switchdev.o
 
diff --git a/net/bridge/br.c b/net/bridge/br.c
index 1fac72cc617f..96e91d69a9a8 100644
--- a/net/bridge/br.c
+++ b/net/bridge/br.c
@@ -265,6 +265,9 @@ int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
 	case BR_BOOLOPT_MCAST_VLAN_SNOOPING:
 		err = br_multicast_toggle_vlan_snooping(br, on, extack);
 		break;
+	case BR_BOOLOPT_MST_ENABLE:
+		err = br_mst_set_enabled(br, on, extack);
+		break;
 	default:
 		/* shouldn't be called with unsupported options */
 		WARN_ON(1);
@@ -281,6 +284,8 @@ int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt)
 		return br_opt_get(br, BROPT_NO_LL_LEARN);
 	case BR_BOOLOPT_MCAST_VLAN_SNOOPING:
 		return br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED);
+	case BR_BOOLOPT_MST_ENABLE:
+		return br_opt_get(br, BROPT_MST_ENABLED);
 	default:
 		/* shouldn't be called with unsupported options */
 		WARN_ON(1);
@@ -342,23 +347,26 @@ void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on)
 		clear_bit(opt, &br->options);
 }
 
-static void __net_exit br_net_exit(struct net *net)
+static void __net_exit br_net_exit_batch(struct list_head *net_list)
 {
 	struct net_device *dev;
+	struct net *net;
 	LIST_HEAD(list);
 
 	rtnl_lock();
-	for_each_netdev(net, dev)
-		if (netif_is_bridge_master(dev))
-			br_dev_delete(dev, &list);
+
+	list_for_each_entry(net, net_list, exit_list)
+		for_each_netdev(net, dev)
+			if (netif_is_bridge_master(dev))
+				br_dev_delete(dev, &list);
 
 	unregister_netdevice_many(&list);
-	rtnl_unlock();
 
+	rtnl_unlock();
 }
 
 static struct pernet_operations br_net_ops = {
-	.exit	= br_net_exit,
+	.exit_batch	= br_net_exit_batch,
 };
 
 static const struct stp_proto br_stp_proto = {
diff --git a/net/bridge/br_arp_nd_proxy.c b/net/bridge/br_arp_nd_proxy.c
index 3db1def4437b..e5e48c6e35d7 100644
--- a/net/bridge/br_arp_nd_proxy.c
+++ b/net/bridge/br_arp_nd_proxy.c
@@ -84,7 +84,7 @@ static void br_arp_send(struct net_bridge *br, struct net_bridge_port *p,
 		skb->ip_summed = CHECKSUM_UNNECESSARY;
 		skb->pkt_type = PACKET_HOST;
 
-		netif_rx_ni(skb);
+		netif_rx(skb);
 	}
 }
 
@@ -364,7 +364,7 @@ static void br_nd_send(struct net_bridge *br, struct net_bridge_port *p,
 		reply->ip_summed = CHECKSUM_UNNECESSARY;
 		reply->pkt_type = PACKET_HOST;
 
-		netif_rx_ni(reply);
+		netif_rx(reply);
 	}
 }
 
diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c
index ec646656dbf1..02bb620d3b8d 100644
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -62,7 +62,7 @@ EXPORT_SYMBOL_GPL(br_dev_queue_push_xmit);
 
 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
 {
-	skb->tstamp = 0;
+	skb_clear_tstamp(skb);
 	return NF_HOOK(NFPROTO_BRIDGE, NF_BR_POST_ROUTING,
 		       net, sk, skb, NULL, skb->dev,
 		       br_dev_queue_push_xmit);
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index b50382f957c1..196417859c4a 100644
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -78,20 +78,38 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb
 	u16 vid = 0;
 	u8 state;
 
-	if (!p || p->state == BR_STATE_DISABLED)
+	if (!p)
 		goto drop;
 
+	br = p->br;
+
+	if (br_mst_is_enabled(br)) {
+		state = BR_STATE_FORWARDING;
+	} else {
+		if (p->state == BR_STATE_DISABLED)
+			goto drop;
+
+		state = p->state;
+	}
+
 	brmctx = &p->br->multicast_ctx;
 	pmctx = &p->multicast_ctx;
-	state = p->state;
 	if (!br_allowed_ingress(p->br, nbp_vlan_group_rcu(p), skb, &vid,
 				&state, &vlan))
 		goto out;
 
+	if (p->flags & BR_PORT_LOCKED) {
+		struct net_bridge_fdb_entry *fdb_src =
+			br_fdb_find_rcu(br, eth_hdr(skb)->h_source, vid);
+
+		if (!fdb_src || READ_ONCE(fdb_src->dst) != p ||
+		    test_bit(BR_FDB_LOCAL, &fdb_src->flags))
+			goto drop;
+	}
+
 	nbp_switchdev_frame_mark(p, skb);
 
 	/* insert into forwarding database after filtering to avoid spoofing */
-	br = p->br;
 	if (p->flags & BR_LEARNING)
 		br_fdb_update(br, p, eth_hdr(skb)->h_source, vid, 0);
 
@@ -361,9 +379,13 @@ static rx_handler_result_t br_handle_frame(struct sk_buff **pskb)
 		return RX_HANDLER_PASS;
 
 forward:
+	if (br_mst_is_enabled(p->br))
+		goto defer_stp_filtering;
+
 	switch (p->state) {
 	case BR_STATE_FORWARDING:
 	case BR_STATE_LEARNING:
+defer_stp_filtering:
 		if (ether_addr_equal(p->br->dev->dev_addr, dest))
 			skb->pkt_type = PACKET_HOST;
 
diff --git a/net/bridge/br_mst.c b/net/bridge/br_mst.c
new file mode 100644
index 000000000000..ee680adcee17
--- /dev/null
+++ b/net/bridge/br_mst.c
@@ -0,0 +1,357 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *	Bridge Multiple Spanning Tree Support
+ *
+ *	Authors:
+ *	Tobias Waldekranz		<tobias@waldekranz.com>
+ */
+
+#include <linux/kernel.h>
+#include <net/switchdev.h>
+
+#include "br_private.h"
+
+DEFINE_STATIC_KEY_FALSE(br_mst_used);
+
+bool br_mst_enabled(const struct net_device *dev)
+{
+	if (!netif_is_bridge_master(dev))
+		return false;
+
+	return br_opt_get(netdev_priv(dev), BROPT_MST_ENABLED);
+}
+EXPORT_SYMBOL_GPL(br_mst_enabled);
+
+int br_mst_get_info(const struct net_device *dev, u16 msti, unsigned long *vids)
+{
+	const struct net_bridge_vlan_group *vg;
+	const struct net_bridge_vlan *v;
+	const struct net_bridge *br;
+
+	ASSERT_RTNL();
+
+	if (!netif_is_bridge_master(dev))
+		return -EINVAL;
+
+	br = netdev_priv(dev);
+	if (!br_opt_get(br, BROPT_MST_ENABLED))
+		return -EINVAL;
+
+	vg = br_vlan_group(br);
+
+	list_for_each_entry(v, &vg->vlan_list, vlist) {
+		if (v->msti == msti)
+			__set_bit(v->vid, vids);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(br_mst_get_info);
+
+int br_mst_get_state(const struct net_device *dev, u16 msti, u8 *state)
+{
+	const struct net_bridge_port *p = NULL;
+	const struct net_bridge_vlan_group *vg;
+	const struct net_bridge_vlan *v;
+
+	ASSERT_RTNL();
+
+	p = br_port_get_check_rtnl(dev);
+	if (!p || !br_opt_get(p->br, BROPT_MST_ENABLED))
+		return -EINVAL;
+
+	vg = nbp_vlan_group(p);
+
+	list_for_each_entry(v, &vg->vlan_list, vlist) {
+		if (v->brvlan->msti == msti) {
+			*state = v->state;
+			return 0;
+		}
+	}
+
+	return -ENOENT;
+}
+EXPORT_SYMBOL_GPL(br_mst_get_state);
+
+static void br_mst_vlan_set_state(struct net_bridge_port *p, struct net_bridge_vlan *v,
+				  u8 state)
+{
+	struct net_bridge_vlan_group *vg = nbp_vlan_group(p);
+
+	if (v->state == state)
+		return;
+
+	br_vlan_set_state(v, state);
+
+	if (v->vid == vg->pvid)
+		br_vlan_set_pvid_state(vg, state);
+}
+
+int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state,
+		     struct netlink_ext_ack *extack)
+{
+	struct switchdev_attr attr = {
+		.id = SWITCHDEV_ATTR_ID_PORT_MST_STATE,
+		.orig_dev = p->dev,
+		.u.mst_state = {
+			.msti = msti,
+			.state = state,
+		},
+	};
+	struct net_bridge_vlan_group *vg;
+	struct net_bridge_vlan *v;
+	int err;
+
+	vg = nbp_vlan_group(p);
+	if (!vg)
+		return 0;
+
+	/* MSTI 0 (CST) state changes are notified via the regular
+	 * SWITCHDEV_ATTR_ID_PORT_STP_STATE.
+	 */
+	if (msti) {
+		err = switchdev_port_attr_set(p->dev, &attr, extack);
+		if (err && err != -EOPNOTSUPP)
+			return err;
+	}
+
+	list_for_each_entry(v, &vg->vlan_list, vlist) {
+		if (v->brvlan->msti != msti)
+			continue;
+
+		br_mst_vlan_set_state(p, v, state);
+	}
+
+	return 0;
+}
+
+static void br_mst_vlan_sync_state(struct net_bridge_vlan *pv, u16 msti)
+{
+	struct net_bridge_vlan_group *vg = nbp_vlan_group(pv->port);
+	struct net_bridge_vlan *v;
+
+	list_for_each_entry(v, &vg->vlan_list, vlist) {
+		/* If this port already has a defined state in this
+		 * MSTI (through some other VLAN membership), inherit
+		 * it.
+		 */
+		if (v != pv && v->brvlan->msti == msti) {
+			br_mst_vlan_set_state(pv->port, pv, v->state);
+			return;
+		}
+	}
+
+	/* Otherwise, start out in a new MSTI with all ports disabled. */
+	return br_mst_vlan_set_state(pv->port, pv, BR_STATE_DISABLED);
+}
+
+int br_mst_vlan_set_msti(struct net_bridge_vlan *mv, u16 msti)
+{
+	struct switchdev_attr attr = {
+		.id = SWITCHDEV_ATTR_ID_VLAN_MSTI,
+		.orig_dev = mv->br->dev,
+		.u.vlan_msti = {
+			.vid = mv->vid,
+			.msti = msti,
+		},
+	};
+	struct net_bridge_vlan_group *vg;
+	struct net_bridge_vlan *pv;
+	struct net_bridge_port *p;
+	int err;
+
+	if (mv->msti == msti)
+		return 0;
+
+	err = switchdev_port_attr_set(mv->br->dev, &attr, NULL);
+	if (err && err != -EOPNOTSUPP)
+		return err;
+
+	mv->msti = msti;
+
+	list_for_each_entry(p, &mv->br->port_list, list) {
+		vg = nbp_vlan_group(p);
+
+		pv = br_vlan_find(vg, mv->vid);
+		if (pv)
+			br_mst_vlan_sync_state(pv, msti);
+	}
+
+	return 0;
+}
+
+void br_mst_vlan_init_state(struct net_bridge_vlan *v)
+{
+	/* VLANs always start out in MSTI 0 (CST) */
+	v->msti = 0;
+
+	if (br_vlan_is_master(v))
+		v->state = BR_STATE_FORWARDING;
+	else
+		v->state = v->port->state;
+}
+
+int br_mst_set_enabled(struct net_bridge *br, bool on,
+		       struct netlink_ext_ack *extack)
+{
+	struct switchdev_attr attr = {
+		.id = SWITCHDEV_ATTR_ID_BRIDGE_MST,
+		.orig_dev = br->dev,
+		.u.mst = on,
+	};
+	struct net_bridge_vlan_group *vg;
+	struct net_bridge_port *p;
+	int err;
+
+	list_for_each_entry(p, &br->port_list, list) {
+		vg = nbp_vlan_group(p);
+
+		if (!vg->num_vlans)
+			continue;
+
+		NL_SET_ERR_MSG(extack,
+			       "MST mode can't be changed while VLANs exist");
+		return -EBUSY;
+	}
+
+	if (br_opt_get(br, BROPT_MST_ENABLED) == on)
+		return 0;
+
+	err = switchdev_port_attr_set(br->dev, &attr, extack);
+	if (err && err != -EOPNOTSUPP)
+		return err;
+
+	if (on)
+		static_branch_enable(&br_mst_used);
+	else
+		static_branch_disable(&br_mst_used);
+
+	br_opt_toggle(br, BROPT_MST_ENABLED, on);
+	return 0;
+}
+
+size_t br_mst_info_size(const struct net_bridge_vlan_group *vg)
+{
+	DECLARE_BITMAP(seen, VLAN_N_VID) = { 0 };
+	const struct net_bridge_vlan *v;
+	size_t sz;
+
+	/* IFLA_BRIDGE_MST */
+	sz = nla_total_size(0);
+
+	list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
+		if (test_bit(v->brvlan->msti, seen))
+			continue;
+
+		/* IFLA_BRIDGE_MST_ENTRY */
+		sz += nla_total_size(0) +
+			/* IFLA_BRIDGE_MST_ENTRY_MSTI */
+			nla_total_size(sizeof(u16)) +
+			/* IFLA_BRIDGE_MST_ENTRY_STATE */
+			nla_total_size(sizeof(u8));
+
+		__set_bit(v->brvlan->msti, seen);
+	}
+
+	return sz;
+}
+
+int br_mst_fill_info(struct sk_buff *skb,
+		     const struct net_bridge_vlan_group *vg)
+{
+	DECLARE_BITMAP(seen, VLAN_N_VID) = { 0 };
+	const struct net_bridge_vlan *v;
+	struct nlattr *nest;
+	int err = 0;
+
+	list_for_each_entry(v, &vg->vlan_list, vlist) {
+		if (test_bit(v->brvlan->msti, seen))
+			continue;
+
+		nest = nla_nest_start_noflag(skb, IFLA_BRIDGE_MST_ENTRY);
+		if (!nest ||
+		    nla_put_u16(skb, IFLA_BRIDGE_MST_ENTRY_MSTI, v->brvlan->msti) ||
+		    nla_put_u8(skb, IFLA_BRIDGE_MST_ENTRY_STATE, v->state)) {
+			err = -EMSGSIZE;
+			break;
+		}
+		nla_nest_end(skb, nest);
+
+		__set_bit(v->brvlan->msti, seen);
+	}
+
+	return err;
+}
+
+static const struct nla_policy br_mst_nl_policy[IFLA_BRIDGE_MST_ENTRY_MAX + 1] = {
+	[IFLA_BRIDGE_MST_ENTRY_MSTI] = NLA_POLICY_RANGE(NLA_U16,
+						   1, /* 0 reserved for CST */
+						   VLAN_N_VID - 1),
+	[IFLA_BRIDGE_MST_ENTRY_STATE] = NLA_POLICY_RANGE(NLA_U8,
+						    BR_STATE_DISABLED,
+						    BR_STATE_BLOCKING),
+};
+
+static int br_mst_process_one(struct net_bridge_port *p,
+			      const struct nlattr *attr,
+			      struct netlink_ext_ack *extack)
+{
+	struct nlattr *tb[IFLA_BRIDGE_MST_ENTRY_MAX + 1];
+	u16 msti;
+	u8 state;
+	int err;
+
+	err = nla_parse_nested(tb, IFLA_BRIDGE_MST_ENTRY_MAX, attr,
+			       br_mst_nl_policy, extack);
+	if (err)
+		return err;
+
+	if (!tb[IFLA_BRIDGE_MST_ENTRY_MSTI]) {
+		NL_SET_ERR_MSG_MOD(extack, "MSTI not specified");
+		return -EINVAL;
+	}
+
+	if (!tb[IFLA_BRIDGE_MST_ENTRY_STATE]) {
+		NL_SET_ERR_MSG_MOD(extack, "State not specified");
+		return -EINVAL;
+	}
+
+	msti = nla_get_u16(tb[IFLA_BRIDGE_MST_ENTRY_MSTI]);
+	state = nla_get_u8(tb[IFLA_BRIDGE_MST_ENTRY_STATE]);
+
+	return br_mst_set_state(p, msti, state, extack);
+}
+
+int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr,
+		   struct netlink_ext_ack *extack)
+{
+	struct nlattr *attr;
+	int err, msts = 0;
+	int rem;
+
+	if (!br_opt_get(p->br, BROPT_MST_ENABLED)) {
+		NL_SET_ERR_MSG_MOD(extack, "Can't modify MST state when MST is disabled");
+		return -EBUSY;
+	}
+
+	nla_for_each_nested(attr, mst_attr, rem) {
+		switch (nla_type(attr)) {
+		case IFLA_BRIDGE_MST_ENTRY:
+			err = br_mst_process_one(p, attr, extack);
+			break;
+		default:
+			continue;
+		}
+
+		msts++;
+		if (err)
+			break;
+	}
+
+	if (!msts) {
+		NL_SET_ERR_MSG_MOD(extack, "Found no MST entries to process");
+		err = -EINVAL;
+	}
+
+	return err;
+}
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 2ff83d84230d..200ad05b296f 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -119,6 +119,9 @@ static size_t br_get_link_af_size_filtered(const struct net_device *dev,
 	/* Each VLAN is returned in bridge_vlan_info along with flags */
 	vinfo_sz += num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
 
+	if (p && vg && (filter_mask & RTEXT_FILTER_MST))
+		vinfo_sz += br_mst_info_size(vg);
+
 	if (!(filter_mask & RTEXT_FILTER_CFM_STATUS))
 		return vinfo_sz;
 
@@ -184,6 +187,7 @@ static inline size_t br_port_info_size(void)
 		+ nla_total_size(1)	/* IFLA_BRPORT_VLAN_TUNNEL */
 		+ nla_total_size(1)	/* IFLA_BRPORT_NEIGH_SUPPRESS */
 		+ nla_total_size(1)	/* IFLA_BRPORT_ISOLATED */
+		+ nla_total_size(1)	/* IFLA_BRPORT_LOCKED */
 		+ nla_total_size(sizeof(struct ifla_bridge_id))	/* IFLA_BRPORT_ROOT_ID */
 		+ nla_total_size(sizeof(struct ifla_bridge_id))	/* IFLA_BRPORT_BRIDGE_ID */
 		+ nla_total_size(sizeof(u16))	/* IFLA_BRPORT_DESIGNATED_PORT */
@@ -269,7 +273,8 @@ static int br_port_fill_attrs(struct sk_buff *skb,
 							  BR_MRP_LOST_CONT)) ||
 	    nla_put_u8(skb, IFLA_BRPORT_MRP_IN_OPEN,
 		       !!(p->flags & BR_MRP_LOST_IN_CONT)) ||
-	    nla_put_u8(skb, IFLA_BRPORT_ISOLATED, !!(p->flags & BR_ISOLATED)))
+	    nla_put_u8(skb, IFLA_BRPORT_ISOLATED, !!(p->flags & BR_ISOLATED)) ||
+	    nla_put_u8(skb, IFLA_BRPORT_LOCKED, !!(p->flags & BR_PORT_LOCKED)))
 		return -EMSGSIZE;
 
 	timerval = br_timer_value(&p->message_age_timer);
@@ -483,7 +488,8 @@ static int br_fill_ifinfo(struct sk_buff *skb,
 			   RTEXT_FILTER_BRVLAN_COMPRESSED |
 			   RTEXT_FILTER_MRP |
 			   RTEXT_FILTER_CFM_CONFIG |
-			   RTEXT_FILTER_CFM_STATUS)) {
+			   RTEXT_FILTER_CFM_STATUS |
+			   RTEXT_FILTER_MST)) {
 		af = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
 		if (!af)
 			goto nla_put_failure;
@@ -562,7 +568,28 @@ static int br_fill_ifinfo(struct sk_buff *skb,
 		nla_nest_end(skb, cfm_nest);
 	}
 
+	if ((filter_mask & RTEXT_FILTER_MST) &&
+	    br_opt_get(br, BROPT_MST_ENABLED) && port) {
+		const struct net_bridge_vlan_group *vg = nbp_vlan_group(port);
+		struct nlattr *mst_nest;
+		int err;
+
+		if (!vg || !vg->num_vlans)
+			goto done;
+
+		mst_nest = nla_nest_start(skb, IFLA_BRIDGE_MST);
+		if (!mst_nest)
+			goto nla_put_failure;
+
+		err = br_mst_fill_info(skb, vg);
+		if (err)
+			goto nla_put_failure;
+
+		nla_nest_end(skb, mst_nest);
+	}
+
 done:
+
 	if (af)
 		nla_nest_end(skb, af);
 	nlmsg_end(skb, nlh);
@@ -801,6 +828,23 @@ static int br_afspec(struct net_bridge *br,
 			if (err)
 				return err;
 			break;
+		case IFLA_BRIDGE_MST:
+			if (!p) {
+				NL_SET_ERR_MSG(extack,
+					       "MST states can only be set on bridge ports");
+				return -EINVAL;
+			}
+
+			if (cmd != RTM_SETLINK) {
+				NL_SET_ERR_MSG(extack,
+					       "MST states can only be set through RTM_SETLINK");
+				return -EINVAL;
+			}
+
+			err = br_mst_process(p, attr, extack);
+			if (err)
+				return err;
+			break;
 		}
 	}
 
@@ -827,6 +871,7 @@ static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
 	[IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 },
 	[IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 },
 	[IFLA_BRPORT_ISOLATED]	= { .type = NLA_U8 },
+	[IFLA_BRPORT_LOCKED] = { .type = NLA_U8 },
 	[IFLA_BRPORT_BACKUP_PORT] = { .type = NLA_U32 },
 	[IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT] = { .type = NLA_U32 },
 };
@@ -893,6 +938,7 @@ static int br_setport(struct net_bridge_port *p, struct nlattr *tb[],
 	br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
 	br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS, BR_NEIGH_SUPPRESS);
 	br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED);
+	br_set_port_flag(p, tb, IFLA_BRPORT_LOCKED, BR_PORT_LOCKED);
 
 	changed_mask = old_flags ^ p->flags;
 
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 2661dda1a92b..18ccc3d5d296 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -178,6 +178,7 @@ enum {
  * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context
  * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast
  *                  context
+ * @msti: if MASTER flag set, this holds the VLANs MST instance
  * @vlist: sorted list of VLAN entries
  * @rcu: used for entry destruction
  *
@@ -210,6 +211,8 @@ struct net_bridge_vlan {
 		struct net_bridge_mcast_port	port_mcast_ctx;
 	};
 
+	u16				msti;
+
 	struct list_head		vlist;
 
 	struct rcu_head			rcu;
@@ -445,6 +448,7 @@ enum net_bridge_opts {
 	BROPT_NO_LL_LEARN,
 	BROPT_VLAN_BRIDGE_BINDING,
 	BROPT_MCAST_VLAN_SNOOPING_ENABLED,
+	BROPT_MST_ENABLED,
 };
 
 struct net_bridge {
@@ -1765,6 +1769,63 @@ static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
 }
 #endif
 
+/* br_mst.c */
+#ifdef CONFIG_BRIDGE_VLAN_FILTERING
+DECLARE_STATIC_KEY_FALSE(br_mst_used);
+static inline bool br_mst_is_enabled(struct net_bridge *br)
+{
+	return static_branch_unlikely(&br_mst_used) &&
+		br_opt_get(br, BROPT_MST_ENABLED);
+}
+
+int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state,
+		     struct netlink_ext_ack *extack);
+int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti);
+void br_mst_vlan_init_state(struct net_bridge_vlan *v);
+int br_mst_set_enabled(struct net_bridge *br, bool on,
+		       struct netlink_ext_ack *extack);
+size_t br_mst_info_size(const struct net_bridge_vlan_group *vg);
+int br_mst_fill_info(struct sk_buff *skb,
+		     const struct net_bridge_vlan_group *vg);
+int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr,
+		   struct netlink_ext_ack *extack);
+#else
+static inline bool br_mst_is_enabled(struct net_bridge *br)
+{
+	return false;
+}
+
+static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti,
+				   u8 state, struct netlink_ext_ack *extack)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int br_mst_set_enabled(struct net_bridge *br, bool on,
+				     struct netlink_ext_ack *extack)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg)
+{
+	return 0;
+}
+
+static inline int br_mst_fill_info(struct sk_buff *skb,
+				   const struct net_bridge_vlan_group *vg)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int br_mst_process(struct net_bridge_port *p,
+				 const struct nlattr *mst_attr,
+				 struct netlink_ext_ack *extack)
+{
+	return -EOPNOTSUPP;
+}
+#endif
+
 struct nf_br_ops {
 	int (*br_dev_xmit_hook)(struct sk_buff *skb);
 };
@@ -1985,7 +2046,7 @@ void br_switchdev_mdb_notify(struct net_device *dev,
 			     struct net_bridge_port_group *pg,
 			     int type);
 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
-			       struct netlink_ext_ack *extack);
+			       bool changed, struct netlink_ext_ack *extack);
 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
 void br_switchdev_init(struct net_bridge *br);
 
@@ -2052,8 +2113,8 @@ static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
 	return 0;
 }
 
-static inline int br_switchdev_port_vlan_add(struct net_device *dev,
-					     u16 vid, u16 flags,
+static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid,
+					     u16 flags, bool changed,
 					     struct netlink_ext_ack *extack)
 {
 	return -EOPNOTSUPP;
diff --git a/net/bridge/br_stp.c b/net/bridge/br_stp.c
index 1d80f34a139c..7d27b2e6038f 100644
--- a/net/bridge/br_stp.c
+++ b/net/bridge/br_stp.c
@@ -43,6 +43,12 @@ void br_set_state(struct net_bridge_port *p, unsigned int state)
 		return;
 
 	p->state = state;
+	if (br_opt_get(p->br, BROPT_MST_ENABLED)) {
+		err = br_mst_set_state(p, 0, state, NULL);
+		if (err)
+			br_warn(p->br, "error setting MST state on port %u(%s)\n",
+				p->port_no, netdev_name(p->dev));
+	}
 	err = switchdev_port_attr_set(p->dev, &attr, NULL);
 	if (err && err != -EOPNOTSUPP)
 		br_warn(p->br, "error setting offload STP state on port %u(%s)\n",
diff --git a/net/bridge/br_switchdev.c b/net/bridge/br_switchdev.c
index f8fbaaa7c501..8cc44c367231 100644
--- a/net/bridge/br_switchdev.c
+++ b/net/bridge/br_switchdev.c
@@ -72,7 +72,7 @@ bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
 
 /* Flags that can be offloaded to hardware */
 #define BR_PORT_FLAGS_HW_OFFLOAD (BR_LEARNING | BR_FLOOD | \
-				  BR_MCAST_FLOOD | BR_BCAST_FLOOD)
+				  BR_MCAST_FLOOD | BR_BCAST_FLOOD | BR_PORT_LOCKED)
 
 int br_switchdev_set_port_flag(struct net_bridge_port *p,
 			       unsigned long flags,
@@ -160,13 +160,14 @@ br_switchdev_fdb_notify(struct net_bridge *br,
 }
 
 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
-			       struct netlink_ext_ack *extack)
+			       bool changed, struct netlink_ext_ack *extack)
 {
 	struct switchdev_obj_port_vlan v = {
 		.obj.orig_dev = dev,
 		.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
 		.flags = flags,
 		.vid = vid,
+		.changed = changed,
 	};
 
 	return switchdev_port_obj_add(dev, &v.obj, extack);
@@ -330,6 +331,46 @@ br_switchdev_fdb_replay(const struct net_device *br_dev, const void *ctx,
 	return err;
 }
 
+static int br_switchdev_vlan_attr_replay(struct net_device *br_dev,
+					 const void *ctx,
+					 struct notifier_block *nb,
+					 struct netlink_ext_ack *extack)
+{
+	struct switchdev_notifier_port_attr_info attr_info = {
+		.info = {
+			.dev = br_dev,
+			.extack = extack,
+			.ctx = ctx,
+		},
+	};
+	struct net_bridge *br = netdev_priv(br_dev);
+	struct net_bridge_vlan_group *vg;
+	struct switchdev_attr attr;
+	struct net_bridge_vlan *v;
+	int err;
+
+	attr_info.attr = &attr;
+	attr.orig_dev = br_dev;
+
+	vg = br_vlan_group(br);
+
+	list_for_each_entry(v, &vg->vlan_list, vlist) {
+		if (v->msti) {
+			attr.id = SWITCHDEV_ATTR_ID_VLAN_MSTI;
+			attr.u.vlan_msti.vid = v->vid;
+			attr.u.vlan_msti.msti = v->msti;
+
+			err = nb->notifier_call(nb, SWITCHDEV_PORT_ATTR_SET,
+						&attr_info);
+			err = notifier_to_errno(err);
+			if (err)
+				return err;
+		}
+	}
+
+	return 0;
+}
+
 static int
 br_switchdev_vlan_replay_one(struct notifier_block *nb,
 			     struct net_device *dev,
@@ -351,19 +392,50 @@ br_switchdev_vlan_replay_one(struct notifier_block *nb,
 	return notifier_to_errno(err);
 }
 
+static int br_switchdev_vlan_replay_group(struct notifier_block *nb,
+					  struct net_device *dev,
+					  struct net_bridge_vlan_group *vg,
+					  const void *ctx, unsigned long action,
+					  struct netlink_ext_ack *extack)
+{
+	struct net_bridge_vlan *v;
+	int err = 0;
+	u16 pvid;
+
+	if (!vg)
+		return 0;
+
+	pvid = br_get_pvid(vg);
+
+	list_for_each_entry(v, &vg->vlan_list, vlist) {
+		struct switchdev_obj_port_vlan vlan = {
+			.obj.orig_dev = dev,
+			.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
+			.flags = br_vlan_flags(v, pvid),
+			.vid = v->vid,
+		};
+
+		if (!br_vlan_should_use(v))
+			continue;
+
+		err = br_switchdev_vlan_replay_one(nb, dev, &vlan, ctx,
+						   action, extack);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
 static int br_switchdev_vlan_replay(struct net_device *br_dev,
-				    struct net_device *dev,
 				    const void *ctx, bool adding,
 				    struct notifier_block *nb,
 				    struct netlink_ext_ack *extack)
 {
-	struct net_bridge_vlan_group *vg;
-	struct net_bridge_vlan *v;
+	struct net_bridge *br = netdev_priv(br_dev);
 	struct net_bridge_port *p;
-	struct net_bridge *br;
 	unsigned long action;
-	int err = 0;
-	u16 pvid;
+	int err;
 
 	ASSERT_RTNL();
 
@@ -373,49 +445,33 @@ static int br_switchdev_vlan_replay(struct net_device *br_dev,
 	if (!netif_is_bridge_master(br_dev))
 		return -EINVAL;
 
-	if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev))
-		return -EINVAL;
-
-	if (netif_is_bridge_master(dev)) {
-		br = netdev_priv(dev);
-		vg = br_vlan_group(br);
-		p = NULL;
-	} else {
-		p = br_port_get_rtnl(dev);
-		if (WARN_ON(!p))
-			return -EINVAL;
-		vg = nbp_vlan_group(p);
-		br = p->br;
-	}
-
-	if (!vg)
-		return 0;
-
 	if (adding)
 		action = SWITCHDEV_PORT_OBJ_ADD;
 	else
 		action = SWITCHDEV_PORT_OBJ_DEL;
 
-	pvid = br_get_pvid(vg);
+	err = br_switchdev_vlan_replay_group(nb, br_dev, br_vlan_group(br),
+					     ctx, action, extack);
+	if (err)
+		return err;
 
-	list_for_each_entry(v, &vg->vlan_list, vlist) {
-		struct switchdev_obj_port_vlan vlan = {
-			.obj.orig_dev = dev,
-			.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
-			.flags = br_vlan_flags(v, pvid),
-			.vid = v->vid,
-		};
+	list_for_each_entry(p, &br->port_list, list) {
+		struct net_device *dev = p->dev;
 
-		if (!br_vlan_should_use(v))
-			continue;
+		err = br_switchdev_vlan_replay_group(nb, dev,
+						     nbp_vlan_group(p),
+						     ctx, action, extack);
+		if (err)
+			return err;
+	}
 
-		err = br_switchdev_vlan_replay_one(nb, dev, &vlan, ctx,
-						   action, extack);
+	if (adding) {
+		err = br_switchdev_vlan_attr_replay(br_dev, ctx, nb, extack);
 		if (err)
 			return err;
 	}
 
-	return err;
+	return 0;
 }
 
 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
@@ -681,8 +737,7 @@ static int nbp_switchdev_sync_objs(struct net_bridge_port *p, const void *ctx,
 	struct net_device *dev = p->dev;
 	int err;
 
-	err = br_switchdev_vlan_replay(br_dev, dev, ctx, true, blocking_nb,
-				       extack);
+	err = br_switchdev_vlan_replay(br_dev, ctx, true, blocking_nb, extack);
 	if (err && err != -EOPNOTSUPP)
 		return err;
 
@@ -706,11 +761,11 @@ static void nbp_switchdev_unsync_objs(struct net_bridge_port *p,
 	struct net_device *br_dev = p->br->dev;
 	struct net_device *dev = p->dev;
 
-	br_switchdev_vlan_replay(br_dev, dev, ctx, false, blocking_nb, NULL);
+	br_switchdev_fdb_replay(br_dev, ctx, false, atomic_nb);
 
 	br_switchdev_mdb_replay(br_dev, dev, ctx, false, blocking_nb, NULL);
 
-	br_switchdev_fdb_replay(br_dev, ctx, false, atomic_nb);
+	br_switchdev_vlan_replay(br_dev, ctx, false, blocking_nb, NULL);
 }
 
 /* Let the bridge know that this port is offloaded, so that it can assign a
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index 1402d5ca242d..0f5e75ccac79 100644
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -34,53 +34,70 @@ static struct net_bridge_vlan *br_vlan_lookup(struct rhashtable *tbl, u16 vid)
 	return rhashtable_lookup_fast(tbl, &vid, br_vlan_rht_params);
 }
 
-static bool __vlan_add_pvid(struct net_bridge_vlan_group *vg,
+static void __vlan_add_pvid(struct net_bridge_vlan_group *vg,
 			    const struct net_bridge_vlan *v)
 {
 	if (vg->pvid == v->vid)
-		return false;
+		return;
 
 	smp_wmb();
 	br_vlan_set_pvid_state(vg, v->state);
 	vg->pvid = v->vid;
-
-	return true;
 }
 
-static bool __vlan_delete_pvid(struct net_bridge_vlan_group *vg, u16 vid)
+static void __vlan_delete_pvid(struct net_bridge_vlan_group *vg, u16 vid)
 {
 	if (vg->pvid != vid)
-		return false;
+		return;
 
 	smp_wmb();
 	vg->pvid = 0;
-
-	return true;
 }
 
-/* return true if anything changed, false otherwise */
-static bool __vlan_add_flags(struct net_bridge_vlan *v, u16 flags)
+/* Update the BRIDGE_VLAN_INFO_PVID and BRIDGE_VLAN_INFO_UNTAGGED flags of @v.
+ * If @commit is false, return just whether the BRIDGE_VLAN_INFO_PVID and
+ * BRIDGE_VLAN_INFO_UNTAGGED bits of @flags would produce any change onto @v.
+ */
+static bool __vlan_flags_update(struct net_bridge_vlan *v, u16 flags,
+				bool commit)
 {
 	struct net_bridge_vlan_group *vg;
-	u16 old_flags = v->flags;
-	bool ret;
+	bool change;
 
 	if (br_vlan_is_master(v))
 		vg = br_vlan_group(v->br);
 	else
 		vg = nbp_vlan_group(v->port);
 
+	/* check if anything would be changed on commit */
+	change = !!(flags & BRIDGE_VLAN_INFO_PVID) == !!(vg->pvid != v->vid) ||
+		 ((flags ^ v->flags) & BRIDGE_VLAN_INFO_UNTAGGED);
+
+	if (!commit)
+		goto out;
+
 	if (flags & BRIDGE_VLAN_INFO_PVID)
-		ret = __vlan_add_pvid(vg, v);
+		__vlan_add_pvid(vg, v);
 	else
-		ret = __vlan_delete_pvid(vg, v->vid);
+		__vlan_delete_pvid(vg, v->vid);
 
 	if (flags & BRIDGE_VLAN_INFO_UNTAGGED)
 		v->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 	else
 		v->flags &= ~BRIDGE_VLAN_INFO_UNTAGGED;
 
-	return ret || !!(old_flags ^ v->flags);
+out:
+	return change;
+}
+
+static bool __vlan_flags_would_change(struct net_bridge_vlan *v, u16 flags)
+{
+	return __vlan_flags_update(v, flags, false);
+}
+
+static void __vlan_flags_commit(struct net_bridge_vlan *v, u16 flags)
+{
+	__vlan_flags_update(v, flags, true);
 }
 
 static int __vlan_vid_add(struct net_device *dev, struct net_bridge *br,
@@ -92,7 +109,7 @@ static int __vlan_vid_add(struct net_device *dev, struct net_bridge *br,
 	/* Try switchdev op first. In case it is not supported, fallback to
 	 * 8021q add.
 	 */
-	err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack);
+	err = br_switchdev_port_vlan_add(dev, v->vid, flags, false, extack);
 	if (err == -EOPNOTSUPP)
 		return vlan_vid_add(dev, br->vlan_proto, v->vid);
 	v->priv_flags |= BR_VLFLAG_ADDED_BY_SWITCHDEV;
@@ -209,6 +226,24 @@ static void nbp_vlan_rcu_free(struct rcu_head *rcu)
 	kfree(v);
 }
 
+static void br_vlan_init_state(struct net_bridge_vlan *v)
+{
+	struct net_bridge *br;
+
+	if (br_vlan_is_master(v))
+		br = v->br;
+	else
+		br = v->port->br;
+
+	if (br_opt_get(br, BROPT_MST_ENABLED)) {
+		br_mst_vlan_init_state(v);
+		return;
+	}
+
+	v->state = BR_STATE_FORWARDING;
+	v->msti = 0;
+}
+
 /* This is the shared VLAN add function which works for both ports and bridge
  * devices. There are four possible calls to this function in terms of the
  * vlan entry type:
@@ -284,9 +319,12 @@ static int __vlan_add(struct net_bridge_vlan *v, u16 flags,
 		}
 		br_multicast_port_ctx_init(p, v, &v->port_mcast_ctx);
 	} else {
-		err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack);
-		if (err && err != -EOPNOTSUPP)
-			goto out;
+		if (br_vlan_should_use(v)) {
+			err = br_switchdev_port_vlan_add(dev, v->vid, flags,
+							 false, extack);
+			if (err && err != -EOPNOTSUPP)
+				goto out;
+		}
 		br_multicast_ctx_init(br, v, &v->br_mcast_ctx);
 		v->priv_flags |= BR_VLFLAG_GLOBAL_MCAST_ENABLED;
 	}
@@ -302,7 +340,7 @@ static int __vlan_add(struct net_bridge_vlan *v, u16 flags,
 	}
 
 	/* set the state before publishing */
-	v->state = BR_STATE_FORWARDING;
+	br_vlan_init_state(v);
 
 	err = rhashtable_lookup_insert_fast(&vg->vlan_hash, &v->vnode,
 					    br_vlan_rht_params);
@@ -310,7 +348,7 @@ static int __vlan_add(struct net_bridge_vlan *v, u16 flags,
 		goto out_fdb_insert;
 
 	__vlan_add_list(v);
-	__vlan_add_flags(v, flags);
+	__vlan_flags_commit(v, flags);
 	br_multicast_toggle_one_vlan(v, true);
 
 	if (p)
@@ -404,6 +442,7 @@ static void __vlan_flush(const struct net_bridge *br,
 {
 	struct net_bridge_vlan *vlan, *tmp;
 	u16 v_start = 0, v_end = 0;
+	int err;
 
 	__vlan_delete_pvid(vg, vg->pvid);
 	list_for_each_entry_safe(vlan, tmp, &vg->vlan_list, vlist) {
@@ -417,7 +456,13 @@ static void __vlan_flush(const struct net_bridge *br,
 		}
 		v_end = vlan->vid;
 
-		__vlan_del(vlan);
+		err = __vlan_del(vlan);
+		if (err) {
+			br_err(br,
+			       "port %u(%s) failed to delete vlan %d: %pe\n",
+			       (unsigned int) p->port_no, p->dev->name,
+			       vlan->vid, ERR_PTR(err));
+		}
 	}
 
 	/* notify about the last/whole vlan range */
@@ -670,18 +715,29 @@ static int br_vlan_add_existing(struct net_bridge *br,
 				u16 flags, bool *changed,
 				struct netlink_ext_ack *extack)
 {
+	bool would_change = __vlan_flags_would_change(vlan, flags);
+	bool becomes_brentry = false;
 	int err;
 
-	err = br_switchdev_port_vlan_add(br->dev, vlan->vid, flags, extack);
-	if (err && err != -EOPNOTSUPP)
-		return err;
-
 	if (!br_vlan_is_brentry(vlan)) {
 		/* Trying to change flags of non-existent bridge vlan */
-		if (!(flags & BRIDGE_VLAN_INFO_BRENTRY)) {
-			err = -EINVAL;
-			goto err_flags;
-		}
+		if (!(flags & BRIDGE_VLAN_INFO_BRENTRY))
+			return -EINVAL;
+
+		becomes_brentry = true;
+	}
+
+	/* Master VLANs that aren't brentries weren't notified before,
+	 * time to notify them now.
+	 */
+	if (becomes_brentry || would_change) {
+		err = br_switchdev_port_vlan_add(br->dev, vlan->vid, flags,
+						 would_change, extack);
+		if (err && err != -EOPNOTSUPP)
+			return err;
+	}
+
+	if (becomes_brentry) {
 		/* It was only kept for port vlans, now make it real */
 		err = br_fdb_add_local(br, NULL, br->dev->dev_addr, vlan->vid);
 		if (err) {
@@ -696,13 +752,13 @@ static int br_vlan_add_existing(struct net_bridge *br,
 		br_multicast_toggle_one_vlan(vlan, true);
 	}
 
-	if (__vlan_add_flags(vlan, flags))
+	__vlan_flags_commit(vlan, flags);
+	if (would_change)
 		*changed = true;
 
 	return 0;
 
 err_fdb_insert:
-err_flags:
 	br_switchdev_port_vlan_del(br->dev, vlan->vid);
 	return err;
 }
@@ -1247,11 +1303,18 @@ int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
 	*changed = false;
 	vlan = br_vlan_find(nbp_vlan_group(port), vid);
 	if (vlan) {
-		/* Pass the flags to the hardware bridge */
-		ret = br_switchdev_port_vlan_add(port->dev, vid, flags, extack);
-		if (ret && ret != -EOPNOTSUPP)
-			return ret;
-		*changed = __vlan_add_flags(vlan, flags);
+		bool would_change = __vlan_flags_would_change(vlan, flags);
+
+		if (would_change) {
+			/* Pass the flags to the hardware bridge */
+			ret = br_switchdev_port_vlan_add(port->dev, vid, flags,
+							 true, extack);
+			if (ret && ret != -EOPNOTSUPP)
+				return ret;
+		}
+
+		__vlan_flags_commit(vlan, flags);
+		*changed = would_change;
 
 		return 0;
 	}
diff --git a/net/bridge/br_vlan_options.c b/net/bridge/br_vlan_options.c
index a6382973b3e7..a2724d03278c 100644
--- a/net/bridge/br_vlan_options.c
+++ b/net/bridge/br_vlan_options.c
@@ -99,6 +99,11 @@ static int br_vlan_modify_state(struct net_bridge_vlan_group *vg,
 		return -EBUSY;
 	}
 
+	if (br_opt_get(br, BROPT_MST_ENABLED)) {
+		NL_SET_ERR_MSG_MOD(extack, "Can't modify vlan state directly when MST is enabled");
+		return -EBUSY;
+	}
+
 	if (v->state == state)
 		return 0;
 
@@ -291,6 +296,7 @@ bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr,
 					 const struct net_bridge_vlan *r_end)
 {
 	return v_curr->vid - r_end->vid == 1 &&
+		v_curr->msti == r_end->msti &&
 	       ((v_curr->priv_flags ^ r_end->priv_flags) &
 		BR_VLFLAG_GLOBAL_MCAST_ENABLED) == 0 &&
 		br_multicast_ctx_options_equal(&v_curr->br_mcast_ctx,
@@ -379,6 +385,9 @@ bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range,
 #endif
 #endif
 
+	if (nla_put_u16(skb, BRIDGE_VLANDB_GOPTS_MSTI, v_opts->msti))
+		goto out_err;
+
 	nla_nest_end(skb, nest);
 
 	return true;
@@ -410,6 +419,7 @@ static size_t rtnl_vlan_global_opts_nlmsg_size(const struct net_bridge_vlan *v)
 		+ nla_total_size(0) /* BRIDGE_VLANDB_GOPTS_MCAST_ROUTER_PORTS */
 		+ br_rports_size(&v->br_mcast_ctx) /* BRIDGE_VLANDB_GOPTS_MCAST_ROUTER_PORTS */
 #endif
+		+ nla_total_size(sizeof(u16)) /* BRIDGE_VLANDB_GOPTS_MSTI */
 		+ nla_total_size(sizeof(u16)); /* BRIDGE_VLANDB_GOPTS_RANGE */
 }
 
@@ -559,6 +569,15 @@ static int br_vlan_process_global_one_opts(const struct net_bridge *br,
 	}
 #endif
 #endif
+	if (tb[BRIDGE_VLANDB_GOPTS_MSTI]) {
+		u16 msti;
+
+		msti = nla_get_u16(tb[BRIDGE_VLANDB_GOPTS_MSTI]);
+		err = br_mst_vlan_set_msti(v, msti);
+		if (err)
+			return err;
+		*changed = true;
+	}
 
 	return 0;
 }
@@ -578,6 +597,7 @@ static const struct nla_policy br_vlan_db_gpol[BRIDGE_VLANDB_GOPTS_MAX + 1] = {
 	[BRIDGE_VLANDB_GOPTS_MCAST_QUERIER_INTVL]	= { .type = NLA_U64 },
 	[BRIDGE_VLANDB_GOPTS_MCAST_STARTUP_QUERY_INTVL]	= { .type = NLA_U64 },
 	[BRIDGE_VLANDB_GOPTS_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
+	[BRIDGE_VLANDB_GOPTS_MSTI] = NLA_POLICY_MAX(NLA_U16, VLAN_N_VID - 1),
 };
 
 int br_vlan_rtm_process_global_options(struct net_device *dev,
diff --git a/net/bridge/netfilter/nf_conntrack_bridge.c b/net/bridge/netfilter/nf_conntrack_bridge.c
index fdbed3158555..73242962be5d 100644
--- a/net/bridge/netfilter/nf_conntrack_bridge.c
+++ b/net/bridge/netfilter/nf_conntrack_bridge.c
@@ -32,6 +32,7 @@ static int nf_br_ip_fragment(struct net *net, struct sock *sk,
 					   struct sk_buff *))
 {
 	int frag_max_size = BR_INPUT_SKB_CB(skb)->frag_max_size;
+	bool mono_delivery_time = skb->mono_delivery_time;
 	unsigned int hlen, ll_rs, mtu;
 	ktime_t tstamp = skb->tstamp;
 	struct ip_frag_state state;
@@ -81,7 +82,7 @@ static int nf_br_ip_fragment(struct net *net, struct sock *sk,
 			if (iter.frag)
 				ip_fraglist_prepare(skb, &iter);
 
-			skb->tstamp = tstamp;
+			skb_set_delivery_time(skb, tstamp, mono_delivery_time);
 			err = output(net, sk, data, skb);
 			if (err || !iter.frag)
 				break;
@@ -112,7 +113,7 @@ slow_path:
 			goto blackhole;
 		}
 
-		skb2->tstamp = tstamp;
+		skb_set_delivery_time(skb2, tstamp, mono_delivery_time);
 		err = output(net, sk, data, skb2);
 		if (err)
 			goto blackhole;
@@ -380,7 +381,7 @@ static unsigned int nf_ct_bridge_confirm(struct sk_buff *skb)
 		protoff = skb_network_offset(skb) + ip_hdrlen(skb);
 		break;
 	case htons(ETH_P_IPV6): {
-		 unsigned char pnum = ipv6_hdr(skb)->nexthdr;
+		unsigned char pnum = ipv6_hdr(skb)->nexthdr;
 		__be16 frag_off;
 
 		protoff = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr), &pnum,
diff --git a/net/bridge/netfilter/nft_meta_bridge.c b/net/bridge/netfilter/nft_meta_bridge.c
index c1ef9cc89b78..8c3eaba87ad2 100644
--- a/net/bridge/netfilter/nft_meta_bridge.c
+++ b/net/bridge/netfilter/nft_meta_bridge.c
@@ -87,6 +87,7 @@ static int nft_meta_bridge_get_init(const struct nft_ctx *ctx,
 		return nft_meta_get_init(ctx, expr, tb);
 	}
 
+	priv->len = len;
 	return nft_parse_register_store(ctx, tb[NFTA_META_DREG], &priv->dreg,
 					NULL, NFT_DATA_VALUE, len);
 }
@@ -98,6 +99,7 @@ static const struct nft_expr_ops nft_meta_bridge_get_ops = {
 	.eval		= nft_meta_bridge_get_eval,
 	.init		= nft_meta_bridge_get_init,
 	.dump		= nft_meta_get_dump,
+	.reduce		= nft_meta_get_reduce,
 };
 
 static bool nft_meta_bridge_set_reduce(struct nft_regs_track *track,
@@ -112,8 +114,7 @@ static bool nft_meta_bridge_set_reduce(struct nft_regs_track *track,
 		if (track->regs[i].selector->ops != &nft_meta_bridge_get_ops)
 			continue;
 
-		track->regs[i].selector = NULL;
-		track->regs[i].bitwise = NULL;
+		__nft_reg_track_cancel(track, i);
 	}
 
 	return false;
diff --git a/net/bridge/netfilter/nft_reject_bridge.c b/net/bridge/netfilter/nft_reject_bridge.c
index fbf858ddec35..71b54fed7263 100644
--- a/net/bridge/netfilter/nft_reject_bridge.c
+++ b/net/bridge/netfilter/nft_reject_bridge.c
@@ -185,6 +185,7 @@ static const struct nft_expr_ops nft_reject_bridge_ops = {
 	.init		= nft_reject_init,
 	.dump		= nft_reject_dump,
 	.validate	= nft_reject_bridge_validate,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static struct nft_expr_type nft_reject_bridge_type __read_mostly = {
diff --git a/net/caif/caif_dev.c b/net/caif/caif_dev.c
index 440139706130..52dd0b6835bc 100644
--- a/net/caif/caif_dev.c
+++ b/net/caif/caif_dev.c
@@ -268,7 +268,7 @@ static int receive(struct sk_buff *skb, struct net_device *dev,
 
 	err = caifd->layer.up->receive(caifd->layer.up, pkt);
 
-	/* For -EILSEQ the packet is not freed so so it now */
+	/* For -EILSEQ the packet is not freed so free it now */
 	if (err == -EILSEQ)
 		cfpkt_destroy(pkt);
 
diff --git a/net/caif/chnl_net.c b/net/caif/chnl_net.c
index 414dc5671c45..4d63ef13a1fd 100644
--- a/net/caif/chnl_net.c
+++ b/net/caif/chnl_net.c
@@ -99,7 +99,7 @@ static int chnl_recv_cb(struct cflayer *layr, struct cfpkt *pkt)
 	else
 		skb->ip_summed = CHECKSUM_NONE;
 
-	netif_rx_any_context(skb);
+	netif_rx(skb);
 
 	/* Update statistics. */
 	priv->netdev->stats.rx_packets++;
diff --git a/net/can/af_can.c b/net/can/af_can.c
index cce2af10eb3e..1fb49d51b25d 100644
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -284,7 +284,7 @@ int can_send(struct sk_buff *skb, int loop)
 	}
 
 	if (newskb)
-		netif_rx_ni(newskb);
+		netif_rx(newskb);
 
 	/* update statistics */
 	pkg_stats->tx_frames++;
diff --git a/net/can/gw.c b/net/can/gw.c
index d8861e862f15..1ea4cc527db3 100644
--- a/net/can/gw.c
+++ b/net/can/gw.c
@@ -577,6 +577,13 @@ static inline void cgw_unregister_filter(struct net *net, struct cgw_job *gwj)
 			  gwj->ccgw.filter.can_mask, can_can_gw_rcv, gwj);
 }
 
+static void cgw_job_free_rcu(struct rcu_head *rcu_head)
+{
+	struct cgw_job *gwj = container_of(rcu_head, struct cgw_job, rcu);
+
+	kmem_cache_free(cgw_cache, gwj);
+}
+
 static int cgw_notifier(struct notifier_block *nb,
 			unsigned long msg, void *ptr)
 {
@@ -596,8 +603,7 @@ static int cgw_notifier(struct notifier_block *nb,
 			if (gwj->src.dev == dev || gwj->dst.dev == dev) {
 				hlist_del(&gwj->list);
 				cgw_unregister_filter(net, gwj);
-				synchronize_rcu();
-				kmem_cache_free(cgw_cache, gwj);
+				call_rcu(&gwj->rcu, cgw_job_free_rcu);
 			}
 		}
 	}
@@ -1155,8 +1161,7 @@ static void cgw_remove_all_jobs(struct net *net)
 	hlist_for_each_entry_safe(gwj, nx, &net->can.cgw_list, list) {
 		hlist_del(&gwj->list);
 		cgw_unregister_filter(net, gwj);
-		synchronize_rcu();
-		kmem_cache_free(cgw_cache, gwj);
+		call_rcu(&gwj->rcu, cgw_job_free_rcu);
 	}
 }
 
@@ -1224,8 +1229,7 @@ static int cgw_remove_job(struct sk_buff *skb, struct nlmsghdr *nlh,
 
 		hlist_del(&gwj->list);
 		cgw_unregister_filter(net, gwj);
-		synchronize_rcu();
-		kmem_cache_free(cgw_cache, gwj);
+		call_rcu(&gwj->rcu, cgw_job_free_rcu);
 		err = 0;
 		break;
 	}
@@ -1239,16 +1243,19 @@ static int __net_init cangw_pernet_init(struct net *net)
 	return 0;
 }
 
-static void __net_exit cangw_pernet_exit(struct net *net)
+static void __net_exit cangw_pernet_exit_batch(struct list_head *net_list)
 {
+	struct net *net;
+
 	rtnl_lock();
-	cgw_remove_all_jobs(net);
+	list_for_each_entry(net, net_list, exit_list)
+		cgw_remove_all_jobs(net);
 	rtnl_unlock();
 }
 
 static struct pernet_operations cangw_pernet_ops = {
 	.init = cangw_pernet_init,
-	.exit = cangw_pernet_exit,
+	.exit_batch = cangw_pernet_exit_batch,
 };
 
 static __init int cgw_module_init(void)
diff --git a/net/can/isotp.c b/net/can/isotp.c
index d2a430b6a13b..f6f8ba1f816d 100644
--- a/net/can/isotp.c
+++ b/net/can/isotp.c
@@ -14,7 +14,6 @@
  * - use CAN_ISOTP_WAIT_TX_DONE flag to block the caller until the PDU is sent
  * - as we have static buffers the check whether the PDU fits into the buffer
  *   is done at FF reception time (no support for sending 'wait frames')
- * - take care of the tx-queue-len as traffic shaping is still on the TODO list
  *
  * Copyright (c) 2020 Volkswagen Group Electronic Research
  * All rights reserved.
@@ -87,9 +86,9 @@ MODULE_ALIAS("can-proto-6");
 /* ISO 15765-2:2016 supports more than 4095 byte per ISO PDU as the FF_DL can
  * take full 32 bit values (4 Gbyte). We would need some good concept to handle
  * this between user space and kernel space. For now increase the static buffer
- * to something about 8 kbyte to be able to test this new functionality.
+ * to something about 64 kbyte to be able to test this new functionality.
  */
-#define MAX_MSG_LENGTH 8200
+#define MAX_MSG_LENGTH 66000
 
 /* N_PCI type values in bits 7-4 of N_PCI bytes */
 #define N_PCI_SF 0x00	/* single frame */
@@ -141,8 +140,10 @@ struct isotp_sock {
 	struct can_isotp_options opt;
 	struct can_isotp_fc_options rxfc, txfc;
 	struct can_isotp_ll_options ll;
+	u32 frame_txtime;
 	u32 force_tx_stmin;
 	u32 force_rx_stmin;
+	u32 cfecho; /* consecutive frame echo tag */
 	struct tpcon rx, tx;
 	struct list_head notifier;
 	wait_queue_head_t wait;
@@ -360,7 +361,7 @@ static int isotp_rcv_fc(struct isotp_sock *so, struct canfd_frame *cf, int ae)
 
 		so->tx_gap = ktime_set(0, 0);
 		/* add transmission time for CAN frame N_As */
-		so->tx_gap = ktime_add_ns(so->tx_gap, so->opt.frame_txtime);
+		so->tx_gap = ktime_add_ns(so->tx_gap, so->frame_txtime);
 		/* add waiting time for consecutive frames N_Cs */
 		if (so->opt.flags & CAN_ISOTP_FORCE_TXSTMIN)
 			so->tx_gap = ktime_add_ns(so->tx_gap,
@@ -712,6 +713,63 @@ static void isotp_fill_dataframe(struct canfd_frame *cf, struct isotp_sock *so,
 		cf->data[0] = so->opt.ext_address;
 }
 
+static void isotp_send_cframe(struct isotp_sock *so)
+{
+	struct sock *sk = &so->sk;
+	struct sk_buff *skb;
+	struct net_device *dev;
+	struct canfd_frame *cf;
+	int can_send_ret;
+	int ae = (so->opt.flags & CAN_ISOTP_EXTEND_ADDR) ? 1 : 0;
+
+	dev = dev_get_by_index(sock_net(sk), so->ifindex);
+	if (!dev)
+		return;
+
+	skb = alloc_skb(so->ll.mtu + sizeof(struct can_skb_priv), GFP_ATOMIC);
+	if (!skb) {
+		dev_put(dev);
+		return;
+	}
+
+	can_skb_reserve(skb);
+	can_skb_prv(skb)->ifindex = dev->ifindex;
+	can_skb_prv(skb)->skbcnt = 0;
+
+	cf = (struct canfd_frame *)skb->data;
+	skb_put_zero(skb, so->ll.mtu);
+
+	/* create consecutive frame */
+	isotp_fill_dataframe(cf, so, ae, 0);
+
+	/* place consecutive frame N_PCI in appropriate index */
+	cf->data[ae] = N_PCI_CF | so->tx.sn++;
+	so->tx.sn %= 16;
+	so->tx.bs++;
+
+	cf->flags = so->ll.tx_flags;
+
+	skb->dev = dev;
+	can_skb_set_owner(skb, sk);
+
+	/* cfecho should have been zero'ed by init/isotp_rcv_echo() */
+	if (so->cfecho)
+		pr_notice_once("can-isotp: cfecho is %08X != 0\n", so->cfecho);
+
+	/* set consecutive frame echo tag */
+	so->cfecho = *(u32 *)cf->data;
+
+	/* send frame with local echo enabled */
+	can_send_ret = can_send(skb, 1);
+	if (can_send_ret) {
+		pr_notice_once("can-isotp: %s: can_send_ret %pe\n",
+			       __func__, ERR_PTR(can_send_ret));
+		if (can_send_ret == -ENOBUFS)
+			pr_notice_once("can-isotp: tx queue is full\n");
+	}
+	dev_put(dev);
+}
+
 static void isotp_create_fframe(struct canfd_frame *cf, struct isotp_sock *so,
 				int ae)
 {
@@ -748,19 +806,74 @@ static void isotp_create_fframe(struct canfd_frame *cf, struct isotp_sock *so,
 	so->tx.state = ISOTP_WAIT_FIRST_FC;
 }
 
+static void isotp_rcv_echo(struct sk_buff *skb, void *data)
+{
+	struct sock *sk = (struct sock *)data;
+	struct isotp_sock *so = isotp_sk(sk);
+	struct canfd_frame *cf = (struct canfd_frame *)skb->data;
+
+	/* only handle my own local echo skb's */
+	if (skb->sk != sk || so->cfecho != *(u32 *)cf->data)
+		return;
+
+	/* cancel local echo timeout */
+	hrtimer_cancel(&so->txtimer);
+
+	/* local echo skb with consecutive frame has been consumed */
+	so->cfecho = 0;
+
+	if (so->tx.idx >= so->tx.len) {
+		/* we are done */
+		so->tx.state = ISOTP_IDLE;
+		wake_up_interruptible(&so->wait);
+		return;
+	}
+
+	if (so->txfc.bs && so->tx.bs >= so->txfc.bs) {
+		/* stop and wait for FC with timeout */
+		so->tx.state = ISOTP_WAIT_FC;
+		hrtimer_start(&so->txtimer, ktime_set(1, 0),
+			      HRTIMER_MODE_REL_SOFT);
+		return;
+	}
+
+	/* no gap between data frames needed => use burst mode */
+	if (!so->tx_gap) {
+		isotp_send_cframe(so);
+		return;
+	}
+
+	/* start timer to send next consecutive frame with correct delay */
+	hrtimer_start(&so->txtimer, so->tx_gap, HRTIMER_MODE_REL_SOFT);
+}
+
 static enum hrtimer_restart isotp_tx_timer_handler(struct hrtimer *hrtimer)
 {
 	struct isotp_sock *so = container_of(hrtimer, struct isotp_sock,
 					     txtimer);
 	struct sock *sk = &so->sk;
-	struct sk_buff *skb;
-	struct net_device *dev;
-	struct canfd_frame *cf;
 	enum hrtimer_restart restart = HRTIMER_NORESTART;
-	int can_send_ret;
-	int ae = (so->opt.flags & CAN_ISOTP_EXTEND_ADDR) ? 1 : 0;
 
 	switch (so->tx.state) {
+	case ISOTP_SENDING:
+
+		/* cfecho should be consumed by isotp_rcv_echo() here */
+		if (!so->cfecho) {
+			/* start timeout for unlikely lost echo skb */
+			hrtimer_set_expires(&so->txtimer,
+					    ktime_add(ktime_get(),
+						      ktime_set(2, 0)));
+			restart = HRTIMER_RESTART;
+
+			/* push out the next consecutive frame */
+			isotp_send_cframe(so);
+			break;
+		}
+
+		/* cfecho has not been cleared in isotp_rcv_echo() */
+		pr_notice_once("can-isotp: cfecho %08X timeout\n", so->cfecho);
+		fallthrough;
+
 	case ISOTP_WAIT_FC:
 	case ISOTP_WAIT_FIRST_FC:
 
@@ -776,78 +889,6 @@ static enum hrtimer_restart isotp_tx_timer_handler(struct hrtimer *hrtimer)
 		wake_up_interruptible(&so->wait);
 		break;
 
-	case ISOTP_SENDING:
-
-		/* push out the next segmented pdu */
-		dev = dev_get_by_index(sock_net(sk), so->ifindex);
-		if (!dev)
-			break;
-
-isotp_tx_burst:
-		skb = alloc_skb(so->ll.mtu + sizeof(struct can_skb_priv),
-				GFP_ATOMIC);
-		if (!skb) {
-			dev_put(dev);
-			break;
-		}
-
-		can_skb_reserve(skb);
-		can_skb_prv(skb)->ifindex = dev->ifindex;
-		can_skb_prv(skb)->skbcnt = 0;
-
-		cf = (struct canfd_frame *)skb->data;
-		skb_put_zero(skb, so->ll.mtu);
-
-		/* create consecutive frame */
-		isotp_fill_dataframe(cf, so, ae, 0);
-
-		/* place consecutive frame N_PCI in appropriate index */
-		cf->data[ae] = N_PCI_CF | so->tx.sn++;
-		so->tx.sn %= 16;
-		so->tx.bs++;
-
-		cf->flags = so->ll.tx_flags;
-
-		skb->dev = dev;
-		can_skb_set_owner(skb, sk);
-
-		can_send_ret = can_send(skb, 1);
-		if (can_send_ret) {
-			pr_notice_once("can-isotp: %s: can_send_ret %pe\n",
-				       __func__, ERR_PTR(can_send_ret));
-			if (can_send_ret == -ENOBUFS)
-				pr_notice_once("can-isotp: tx queue is full, increasing txqueuelen may prevent this error\n");
-		}
-		if (so->tx.idx >= so->tx.len) {
-			/* we are done */
-			so->tx.state = ISOTP_IDLE;
-			dev_put(dev);
-			wake_up_interruptible(&so->wait);
-			break;
-		}
-
-		if (so->txfc.bs && so->tx.bs >= so->txfc.bs) {
-			/* stop and wait for FC */
-			so->tx.state = ISOTP_WAIT_FC;
-			dev_put(dev);
-			hrtimer_set_expires(&so->txtimer,
-					    ktime_add(ktime_get(),
-						      ktime_set(1, 0)));
-			restart = HRTIMER_RESTART;
-			break;
-		}
-
-		/* no gap between data frames needed => use burst mode */
-		if (!so->tx_gap)
-			goto isotp_tx_burst;
-
-		/* start timer to send next data frame with correct delay */
-		dev_put(dev);
-		hrtimer_set_expires(&so->txtimer,
-				    ktime_add(ktime_get(), so->tx_gap));
-		restart = HRTIMER_RESTART;
-		break;
-
 	default:
 		WARN_ON_ONCE(1);
 	}
@@ -1005,26 +1046,29 @@ static int isotp_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
 {
 	struct sock *sk = sock->sk;
 	struct sk_buff *skb;
-	int err = 0;
-	int noblock;
+	struct isotp_sock *so = isotp_sk(sk);
+	int noblock = flags & MSG_DONTWAIT;
+	int ret = 0;
 
-	noblock = flags & MSG_DONTWAIT;
-	flags &= ~MSG_DONTWAIT;
+	if (flags & ~(MSG_DONTWAIT | MSG_TRUNC))
+		return -EINVAL;
 
-	skb = skb_recv_datagram(sk, flags, noblock, &err);
+	if (!so->bound)
+		return -EADDRNOTAVAIL;
+
+	flags &= ~MSG_DONTWAIT;
+	skb = skb_recv_datagram(sk, flags, noblock, &ret);
 	if (!skb)
-		return err;
+		return ret;
 
 	if (size < skb->len)
 		msg->msg_flags |= MSG_TRUNC;
 	else
 		size = skb->len;
 
-	err = memcpy_to_msg(msg, skb->data, size);
-	if (err < 0) {
-		skb_free_datagram(sk, skb);
-		return err;
-	}
+	ret = memcpy_to_msg(msg, skb->data, size);
+	if (ret < 0)
+		goto out_err;
 
 	sock_recv_timestamp(msg, sk, skb);
 
@@ -1034,9 +1078,13 @@ static int isotp_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
 		memcpy(msg->msg_name, skb->cb, msg->msg_namelen);
 	}
 
+	/* set length of return value */
+	ret = (flags & MSG_TRUNC) ? skb->len : size;
+
+out_err:
 	skb_free_datagram(sk, skb);
 
-	return size;
+	return ret;
 }
 
 static int isotp_release(struct socket *sock)
@@ -1075,6 +1123,9 @@ static int isotp_release(struct socket *sock)
 				can_rx_unregister(net, dev, so->rxid,
 						  SINGLE_MASK(so->rxid),
 						  isotp_rcv, sk);
+				can_rx_unregister(net, dev, so->txid,
+						  SINGLE_MASK(so->txid),
+						  isotp_rcv_echo, sk);
 				dev_put(dev);
 				synchronize_rcu();
 			}
@@ -1104,6 +1155,7 @@ static int isotp_bind(struct socket *sock, struct sockaddr *uaddr, int len)
 	struct net *net = sock_net(sk);
 	int ifindex;
 	struct net_device *dev;
+	canid_t tx_id, rx_id;
 	int err = 0;
 	int notify_enetdown = 0;
 	int do_rx_reg = 1;
@@ -1111,8 +1163,18 @@ static int isotp_bind(struct socket *sock, struct sockaddr *uaddr, int len)
 	if (len < ISOTP_MIN_NAMELEN)
 		return -EINVAL;
 
-	if (addr->can_addr.tp.tx_id & (CAN_ERR_FLAG | CAN_RTR_FLAG))
-		return -EADDRNOTAVAIL;
+	/* sanitize tx/rx CAN identifiers */
+	tx_id = addr->can_addr.tp.tx_id;
+	if (tx_id & CAN_EFF_FLAG)
+		tx_id &= (CAN_EFF_FLAG | CAN_EFF_MASK);
+	else
+		tx_id &= CAN_SFF_MASK;
+
+	rx_id = addr->can_addr.tp.rx_id;
+	if (rx_id & CAN_EFF_FLAG)
+		rx_id &= (CAN_EFF_FLAG | CAN_EFF_MASK);
+	else
+		rx_id &= CAN_SFF_MASK;
 
 	if (!addr->can_ifindex)
 		return -ENODEV;
@@ -1124,21 +1186,13 @@ static int isotp_bind(struct socket *sock, struct sockaddr *uaddr, int len)
 		do_rx_reg = 0;
 
 	/* do not validate rx address for functional addressing */
-	if (do_rx_reg) {
-		if (addr->can_addr.tp.rx_id == addr->can_addr.tp.tx_id) {
-			err = -EADDRNOTAVAIL;
-			goto out;
-		}
-
-		if (addr->can_addr.tp.rx_id & (CAN_ERR_FLAG | CAN_RTR_FLAG)) {
-			err = -EADDRNOTAVAIL;
-			goto out;
-		}
+	if (do_rx_reg && rx_id == tx_id) {
+		err = -EADDRNOTAVAIL;
+		goto out;
 	}
 
 	if (so->bound && addr->can_ifindex == so->ifindex &&
-	    addr->can_addr.tp.rx_id == so->rxid &&
-	    addr->can_addr.tp.tx_id == so->txid)
+	    rx_id == so->rxid && tx_id == so->txid)
 		goto out;
 
 	dev = dev_get_by_index(net, addr->can_ifindex);
@@ -1161,11 +1215,18 @@ static int isotp_bind(struct socket *sock, struct sockaddr *uaddr, int len)
 
 	ifindex = dev->ifindex;
 
-	if (do_rx_reg)
-		can_rx_register(net, dev, addr->can_addr.tp.rx_id,
-				SINGLE_MASK(addr->can_addr.tp.rx_id),
+	if (do_rx_reg) {
+		can_rx_register(net, dev, rx_id, SINGLE_MASK(rx_id),
 				isotp_rcv, sk, "isotp", sk);
 
+		/* no consecutive frame echo skb in flight */
+		so->cfecho = 0;
+
+		/* register for echo skb's */
+		can_rx_register(net, dev, tx_id, SINGLE_MASK(tx_id),
+				isotp_rcv_echo, sk, "isotpe", sk);
+	}
+
 	dev_put(dev);
 
 	if (so->bound && do_rx_reg) {
@@ -1176,6 +1237,9 @@ static int isotp_bind(struct socket *sock, struct sockaddr *uaddr, int len)
 				can_rx_unregister(net, dev, so->rxid,
 						  SINGLE_MASK(so->rxid),
 						  isotp_rcv, sk);
+				can_rx_unregister(net, dev, so->txid,
+						  SINGLE_MASK(so->txid),
+						  isotp_rcv_echo, sk);
 				dev_put(dev);
 			}
 		}
@@ -1183,8 +1247,8 @@ static int isotp_bind(struct socket *sock, struct sockaddr *uaddr, int len)
 
 	/* switch to new settings */
 	so->ifindex = ifindex;
-	so->rxid = addr->can_addr.tp.rx_id;
-	so->txid = addr->can_addr.tp.tx_id;
+	so->rxid = rx_id;
+	so->txid = tx_id;
 	so->bound = 1;
 
 out:
@@ -1238,6 +1302,14 @@ static int isotp_setsockopt_locked(struct socket *sock, int level, int optname,
 		/* no separate rx_ext_address is given => use ext_address */
 		if (!(so->opt.flags & CAN_ISOTP_RX_EXT_ADDR))
 			so->opt.rx_ext_address = so->opt.ext_address;
+
+		/* check for frame_txtime changes (0 => no changes) */
+		if (so->opt.frame_txtime) {
+			if (so->opt.frame_txtime == CAN_ISOTP_FRAME_TXTIME_ZERO)
+				so->frame_txtime = 0;
+			else
+				so->frame_txtime = so->opt.frame_txtime;
+		}
 		break;
 
 	case CAN_ISOTP_RECV_FC:
@@ -1381,10 +1453,14 @@ static void isotp_notify(struct isotp_sock *so, unsigned long msg,
 	case NETDEV_UNREGISTER:
 		lock_sock(sk);
 		/* remove current filters & unregister */
-		if (so->bound && (!(so->opt.flags & CAN_ISOTP_SF_BROADCAST)))
+		if (so->bound && (!(so->opt.flags & CAN_ISOTP_SF_BROADCAST))) {
 			can_rx_unregister(dev_net(dev), dev, so->rxid,
 					  SINGLE_MASK(so->rxid),
 					  isotp_rcv, sk);
+			can_rx_unregister(dev_net(dev), dev, so->txid,
+					  SINGLE_MASK(so->txid),
+					  isotp_rcv_echo, sk);
+		}
 
 		so->ifindex = 0;
 		so->bound  = 0;
@@ -1439,6 +1515,7 @@ static int isotp_init(struct sock *sk)
 	so->opt.rxpad_content = CAN_ISOTP_DEFAULT_PAD_CONTENT;
 	so->opt.txpad_content = CAN_ISOTP_DEFAULT_PAD_CONTENT;
 	so->opt.frame_txtime = CAN_ISOTP_DEFAULT_FRAME_TXTIME;
+	so->frame_txtime = CAN_ISOTP_DEFAULT_FRAME_TXTIME;
 	so->rxfc.bs = CAN_ISOTP_DEFAULT_RECV_BS;
 	so->rxfc.stmin = CAN_ISOTP_DEFAULT_RECV_STMIN;
 	so->rxfc.wftmax = CAN_ISOTP_DEFAULT_RECV_WFTMAX;
diff --git a/net/core/bpf_sk_storage.c b/net/core/bpf_sk_storage.c
index d9c37fd10809..e3ac36380520 100644
--- a/net/core/bpf_sk_storage.c
+++ b/net/core/bpf_sk_storage.c
@@ -141,7 +141,7 @@ static int bpf_fd_sk_storage_update_elem(struct bpf_map *map, void *key,
 	if (sock) {
 		sdata = bpf_local_storage_update(
 			sock->sk, (struct bpf_local_storage_map *)map, value,
-			map_flags);
+			map_flags, GFP_ATOMIC);
 		sockfd_put(sock);
 		return PTR_ERR_OR_ZERO(sdata);
 	}
@@ -172,7 +172,7 @@ bpf_sk_storage_clone_elem(struct sock *newsk,
 {
 	struct bpf_local_storage_elem *copy_selem;
 
-	copy_selem = bpf_selem_alloc(smap, newsk, NULL, true);
+	copy_selem = bpf_selem_alloc(smap, newsk, NULL, true, GFP_ATOMIC);
 	if (!copy_selem)
 		return NULL;
 
@@ -230,7 +230,7 @@ int bpf_sk_storage_clone(const struct sock *sk, struct sock *newsk)
 			bpf_selem_link_map(smap, copy_selem);
 			bpf_selem_link_storage_nolock(new_sk_storage, copy_selem);
 		} else {
-			ret = bpf_local_storage_alloc(newsk, smap, copy_selem);
+			ret = bpf_local_storage_alloc(newsk, smap, copy_selem, GFP_ATOMIC);
 			if (ret) {
 				kfree(copy_selem);
 				atomic_sub(smap->elem_size,
@@ -255,8 +255,9 @@ out:
 	return ret;
 }
 
-BPF_CALL_4(bpf_sk_storage_get, struct bpf_map *, map, struct sock *, sk,
-	   void *, value, u64, flags)
+/* *gfp_flags* is a hidden argument provided by the verifier */
+BPF_CALL_5(bpf_sk_storage_get, struct bpf_map *, map, struct sock *, sk,
+	   void *, value, u64, flags, gfp_t, gfp_flags)
 {
 	struct bpf_local_storage_data *sdata;
 
@@ -277,7 +278,7 @@ BPF_CALL_4(bpf_sk_storage_get, struct bpf_map *, map, struct sock *, sk,
 	    refcount_inc_not_zero(&sk->sk_refcnt)) {
 		sdata = bpf_local_storage_update(
 			sk, (struct bpf_local_storage_map *)map, value,
-			BPF_NOEXIST);
+			BPF_NOEXIST, gfp_flags);
 		/* sk must be a fullsock (guaranteed by verifier),
 		 * so sock_gen_put() is unnecessary.
 		 */
@@ -405,6 +406,8 @@ static bool bpf_sk_storage_tracing_allowed(const struct bpf_prog *prog)
 	case BPF_TRACE_FENTRY:
 	case BPF_TRACE_FEXIT:
 		btf_vmlinux = bpf_get_btf_vmlinux();
+		if (IS_ERR_OR_NULL(btf_vmlinux))
+			return false;
 		btf_id = prog->aux->attach_btf_id;
 		t = btf_type_by_id(btf_vmlinux, btf_id);
 		tname = btf_name_by_offset(btf_vmlinux, t->name_off);
@@ -417,14 +420,16 @@ static bool bpf_sk_storage_tracing_allowed(const struct bpf_prog *prog)
 	return false;
 }
 
-BPF_CALL_4(bpf_sk_storage_get_tracing, struct bpf_map *, map, struct sock *, sk,
-	   void *, value, u64, flags)
+/* *gfp_flags* is a hidden argument provided by the verifier */
+BPF_CALL_5(bpf_sk_storage_get_tracing, struct bpf_map *, map, struct sock *, sk,
+	   void *, value, u64, flags, gfp_t, gfp_flags)
 {
 	WARN_ON_ONCE(!bpf_rcu_lock_held());
 	if (in_hardirq() || in_nmi())
 		return (unsigned long)NULL;
 
-	return (unsigned long)____bpf_sk_storage_get(map, sk, value, flags);
+	return (unsigned long)____bpf_sk_storage_get(map, sk, value, flags,
+						     gfp_flags);
 }
 
 BPF_CALL_2(bpf_sk_storage_delete_tracing, struct bpf_map *, map,
diff --git a/net/core/dev.c b/net/core/dev.c
index 1baab07820f6..8a5109479dbe 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -216,18 +216,38 @@ static inline struct hlist_head *dev_index_hash(struct net *net, int ifindex)
 	return &net->dev_index_head[ifindex & (NETDEV_HASHENTRIES - 1)];
 }
 
-static inline void rps_lock(struct softnet_data *sd)
+static inline void rps_lock_irqsave(struct softnet_data *sd,
+				    unsigned long *flags)
 {
-#ifdef CONFIG_RPS
-	spin_lock(&sd->input_pkt_queue.lock);
-#endif
+	if (IS_ENABLED(CONFIG_RPS))
+		spin_lock_irqsave(&sd->input_pkt_queue.lock, *flags);
+	else if (!IS_ENABLED(CONFIG_PREEMPT_RT))
+		local_irq_save(*flags);
 }
 
-static inline void rps_unlock(struct softnet_data *sd)
+static inline void rps_lock_irq_disable(struct softnet_data *sd)
 {
-#ifdef CONFIG_RPS
-	spin_unlock(&sd->input_pkt_queue.lock);
-#endif
+	if (IS_ENABLED(CONFIG_RPS))
+		spin_lock_irq(&sd->input_pkt_queue.lock);
+	else if (!IS_ENABLED(CONFIG_PREEMPT_RT))
+		local_irq_disable();
+}
+
+static inline void rps_unlock_irq_restore(struct softnet_data *sd,
+					  unsigned long *flags)
+{
+	if (IS_ENABLED(CONFIG_RPS))
+		spin_unlock_irqrestore(&sd->input_pkt_queue.lock, *flags);
+	else if (!IS_ENABLED(CONFIG_PREEMPT_RT))
+		local_irq_restore(*flags);
+}
+
+static inline void rps_unlock_irq_enable(struct softnet_data *sd)
+{
+	if (IS_ENABLED(CONFIG_RPS))
+		spin_unlock_irq(&sd->input_pkt_queue.lock);
+	else if (!IS_ENABLED(CONFIG_PREEMPT_RT))
+		local_irq_enable();
 }
 
 static struct netdev_name_node *netdev_name_node_alloc(struct net_device *dev,
@@ -320,7 +340,6 @@ int netdev_name_node_alt_create(struct net_device *dev, const char *name)
 
 	return 0;
 }
-EXPORT_SYMBOL(netdev_name_node_alt_create);
 
 static void __netdev_name_node_alt_destroy(struct netdev_name_node *name_node)
 {
@@ -348,7 +367,6 @@ int netdev_name_node_alt_destroy(struct net_device *dev, const char *name)
 
 	return 0;
 }
-EXPORT_SYMBOL(netdev_name_node_alt_destroy);
 
 static void netdev_name_node_alt_flush(struct net_device *dev)
 {
@@ -1037,7 +1055,7 @@ static int __dev_alloc_name(struct net *net, const char *name, char *buf)
 				/*  avoid cases where sscanf is not exact inverse of printf */
 				snprintf(buf, IFNAMSIZ, name, i);
 				if (!strncmp(buf, name_node->name, IFNAMSIZ))
-					set_bit(i, inuse);
+					__set_bit(i, inuse);
 			}
 			if (!sscanf(d->name, name, &i))
 				continue;
@@ -1047,7 +1065,7 @@ static int __dev_alloc_name(struct net *net, const char *name, char *buf)
 			/*  avoid cases where sscanf is not exact inverse of printf */
 			snprintf(buf, IFNAMSIZ, name, i);
 			if (!strncmp(buf, d->name, IFNAMSIZ))
-				set_bit(i, inuse);
+				__set_bit(i, inuse);
 		}
 
 		i = find_first_zero_bit(inuse, max_netdevices);
@@ -1602,7 +1620,8 @@ const char *netdev_cmd_to_name(enum netdev_cmd cmd)
 	N(UDP_TUNNEL_DROP_INFO) N(CHANGE_TX_QUEUE_LEN)
 	N(CVLAN_FILTER_PUSH_INFO) N(CVLAN_FILTER_DROP_INFO)
 	N(SVLAN_FILTER_PUSH_INFO) N(SVLAN_FILTER_DROP_INFO)
-	N(PRE_CHANGEADDR)
+	N(PRE_CHANGEADDR) N(OFFLOAD_XSTATS_ENABLE) N(OFFLOAD_XSTATS_DISABLE)
+	N(OFFLOAD_XSTATS_REPORT_USED) N(OFFLOAD_XSTATS_REPORT_DELTA)
 	}
 #undef N
 	return "UNKNOWN_NETDEV_EVENT";
@@ -1919,6 +1938,32 @@ static int call_netdevice_notifiers_info(unsigned long val,
 	return raw_notifier_call_chain(&netdev_chain, val, info);
 }
 
+/**
+ *	call_netdevice_notifiers_info_robust - call per-netns notifier blocks
+ *	                                       for and rollback on error
+ *	@val_up: value passed unmodified to notifier function
+ *	@val_down: value passed unmodified to the notifier function when
+ *	           recovering from an error on @val_up
+ *	@info: notifier information data
+ *
+ *	Call all per-netns network notifier blocks, but not notifier blocks on
+ *	the global notifier chain. Parameters and return value are as for
+ *	raw_notifier_call_chain_robust().
+ */
+
+static int
+call_netdevice_notifiers_info_robust(unsigned long val_up,
+				     unsigned long val_down,
+				     struct netdev_notifier_info *info)
+{
+	struct net *net = dev_net(info->dev);
+
+	ASSERT_RTNL();
+
+	return raw_notifier_call_chain_robust(&net->netdev_chain,
+					      val_up, val_down, info);
+}
+
 static int call_netdevice_notifiers_extack(unsigned long val,
 					   struct net_device *dev,
 					   struct netlink_ext_ack *extack)
@@ -2000,7 +2045,8 @@ void net_dec_egress_queue(void)
 EXPORT_SYMBOL_GPL(net_dec_egress_queue);
 #endif
 
-static DEFINE_STATIC_KEY_FALSE(netstamp_needed_key);
+DEFINE_STATIC_KEY_FALSE(netstamp_needed_key);
+EXPORT_SYMBOL(netstamp_needed_key);
 #ifdef CONFIG_JUMP_LABEL
 static atomic_t netstamp_needed_deferred;
 static atomic_t netstamp_wanted;
@@ -2061,14 +2107,15 @@ EXPORT_SYMBOL(net_disable_timestamp);
 static inline void net_timestamp_set(struct sk_buff *skb)
 {
 	skb->tstamp = 0;
+	skb->mono_delivery_time = 0;
 	if (static_branch_unlikely(&netstamp_needed_key))
-		__net_timestamp(skb);
+		skb->tstamp = ktime_get_real();
 }
 
 #define net_timestamp_check(COND, SKB)				\
 	if (static_branch_unlikely(&netstamp_needed_key)) {	\
 		if ((COND) && !(SKB)->tstamp)			\
-			__net_timestamp(SKB);			\
+			(SKB)->tstamp = ktime_get_real();	\
 	}							\
 
 bool is_skb_forwardable(const struct net_device *dev, const struct sk_buff *skb)
@@ -2943,13 +2990,25 @@ EXPORT_SYMBOL(netif_set_real_num_queues);
 /**
  * netif_get_num_default_rss_queues - default number of RSS queues
  *
- * This routine should set an upper limit on the number of RSS queues
- * used by default by multiqueue devices.
+ * Default value is the number of physical cores if there are only 1 or 2, or
+ * divided by 2 if there are more.
  */
 int netif_get_num_default_rss_queues(void)
 {
-	return is_kdump_kernel() ?
-		1 : min_t(int, DEFAULT_MAX_NUM_RSS_QUEUES, num_online_cpus());
+	cpumask_var_t cpus;
+	int cpu, count = 0;
+
+	if (unlikely(is_kdump_kernel() || !zalloc_cpumask_var(&cpus, GFP_KERNEL)))
+		return 1;
+
+	cpumask_copy(cpus, cpu_online_mask);
+	for_each_cpu(cpu, cpus) {
+		++count;
+		cpumask_andnot(cpus, cpus, topology_sibling_cpumask(cpu));
+	}
+	free_cpumask_var(cpus);
+
+	return count > 2 ? DIV_ROUND_UP(count, 2) : count;
 }
 EXPORT_SYMBOL(netif_get_num_default_rss_queues);
 
@@ -3586,7 +3645,7 @@ static struct sk_buff *validate_xmit_skb(struct sk_buff *skb, struct net_device
 out_kfree_skb:
 	kfree_skb(skb);
 out_null:
-	atomic_long_inc(&dev->tx_dropped);
+	dev_core_stats_tx_dropped_inc(dev);
 	return NULL;
 }
 
@@ -3710,7 +3769,8 @@ static inline int __dev_xmit_skb(struct sk_buff *skb, struct Qdisc *q,
 
 no_lock_out:
 		if (unlikely(to_free))
-			kfree_skb_list(to_free);
+			kfree_skb_list_reason(to_free,
+					      SKB_DROP_REASON_QDISC_DROP);
 		return rc;
 	}
 
@@ -3765,7 +3825,7 @@ no_lock_out:
 	}
 	spin_unlock(root_lock);
 	if (unlikely(to_free))
-		kfree_skb_list(to_free);
+		kfree_skb_list_reason(to_free, SKB_DROP_REASON_QDISC_DROP);
 	if (unlikely(contended))
 		spin_unlock(&q->busylock);
 	return rc;
@@ -3811,7 +3871,7 @@ int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *skb)
 		skb->ip_summed = CHECKSUM_UNNECESSARY;
 	WARN_ON(!skb_dst(skb));
 	skb_dst_force(skb);
-	netif_rx_ni(skb);
+	netif_rx(skb);
 	return 0;
 }
 EXPORT_SYMBOL(dev_loopback_xmit);
@@ -3840,7 +3900,7 @@ sch_handle_egress(struct sk_buff *skb, int *ret, struct net_device *dev)
 	case TC_ACT_SHOT:
 		mini_qdisc_qstats_cpu_drop(miniq);
 		*ret = NET_XMIT_DROP;
-		kfree_skb(skb);
+		kfree_skb_reason(skb, SKB_DROP_REASON_TC_EGRESS);
 		return NULL;
 	case TC_ACT_STOLEN:
 	case TC_ACT_QUEUED:
@@ -4136,7 +4196,7 @@ recursion_alert:
 	rc = -ENETDOWN;
 	rcu_read_unlock_bh();
 
-	atomic_long_inc(&dev->tx_dropped);
+	dev_core_stats_tx_dropped_inc(dev);
 	kfree_skb_list(skb);
 	return rc;
 out:
@@ -4188,7 +4248,7 @@ int __dev_direct_xmit(struct sk_buff *skb, u16 queue_id)
 	local_bh_enable();
 	return ret;
 drop:
-	atomic_long_inc(&dev->tx_dropped);
+	dev_core_stats_tx_dropped_inc(dev);
 	kfree_skb_list(skb);
 	return NET_XMIT_DROP;
 }
@@ -4217,6 +4277,8 @@ static inline void ____napi_schedule(struct softnet_data *sd,
 {
 	struct task_struct *thread;
 
+	lockdep_assert_irqs_disabled();
+
 	if (test_bit(NAPI_STATE_THREADED, &napi->state)) {
 		/* Paired with smp_mb__before_atomic() in
 		 * napi_enable()/dev_set_threaded().
@@ -4456,11 +4518,11 @@ static void rps_trigger_softirq(void *data)
  * If yes, queue it to our IPI list and return 1
  * If no, return 0
  */
-static int rps_ipi_queued(struct softnet_data *sd)
+static int napi_schedule_rps(struct softnet_data *sd)
 {
-#ifdef CONFIG_RPS
 	struct softnet_data *mysd = this_cpu_ptr(&softnet_data);
 
+#ifdef CONFIG_RPS
 	if (sd != mysd) {
 		sd->rps_ipi_next = mysd->rps_ipi_list;
 		mysd->rps_ipi_list = sd;
@@ -4469,6 +4531,7 @@ static int rps_ipi_queued(struct softnet_data *sd)
 		return 1;
 	}
 #endif /* CONFIG_RPS */
+	__napi_schedule_irqoff(&mysd->backlog);
 	return 0;
 }
 
@@ -4519,15 +4582,15 @@ static bool skb_flow_limit(struct sk_buff *skb, unsigned int qlen)
 static int enqueue_to_backlog(struct sk_buff *skb, int cpu,
 			      unsigned int *qtail)
 {
+	enum skb_drop_reason reason;
 	struct softnet_data *sd;
 	unsigned long flags;
 	unsigned int qlen;
 
+	reason = SKB_DROP_REASON_NOT_SPECIFIED;
 	sd = &per_cpu(softnet_data, cpu);
 
-	local_irq_save(flags);
-
-	rps_lock(sd);
+	rps_lock_irqsave(sd, &flags);
 	if (!netif_running(skb->dev))
 		goto drop;
 	qlen = skb_queue_len(&sd->input_pkt_queue);
@@ -4536,29 +4599,25 @@ static int enqueue_to_backlog(struct sk_buff *skb, int cpu,
 enqueue:
 			__skb_queue_tail(&sd->input_pkt_queue, skb);
 			input_queue_tail_incr_save(sd, qtail);
-			rps_unlock(sd);
-			local_irq_restore(flags);
+			rps_unlock_irq_restore(sd, &flags);
 			return NET_RX_SUCCESS;
 		}
 
 		/* Schedule NAPI for backlog device
 		 * We can use non atomic operation since we own the queue lock
 		 */
-		if (!__test_and_set_bit(NAPI_STATE_SCHED, &sd->backlog.state)) {
-			if (!rps_ipi_queued(sd))
-				____napi_schedule(sd, &sd->backlog);
-		}
+		if (!__test_and_set_bit(NAPI_STATE_SCHED, &sd->backlog.state))
+			napi_schedule_rps(sd);
 		goto enqueue;
 	}
+	reason = SKB_DROP_REASON_CPU_BACKLOG;
 
 drop:
 	sd->dropped++;
-	rps_unlock(sd);
-
-	local_irq_restore(flags);
+	rps_unlock_irq_restore(sd, &flags);
 
-	atomic_long_inc(&skb->dev->rx_dropped);
-	kfree_skb(skb);
+	dev_core_stats_rx_dropped_inc(skb->dev);
+	kfree_skb_reason(skb, reason);
 	return NET_RX_DROP;
 }
 
@@ -4778,7 +4837,7 @@ int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb)
 	}
 	return XDP_PASS;
 out_redir:
-	kfree_skb(skb);
+	kfree_skb_reason(skb, SKB_DROP_REASON_XDP);
 	return XDP_DROP;
 }
 EXPORT_SYMBOL_GPL(do_xdp_generic);
@@ -4796,7 +4855,6 @@ static int netif_rx_internal(struct sk_buff *skb)
 		struct rps_dev_flow voidflow, *rflow = &voidflow;
 		int cpu;
 
-		preempt_disable();
 		rcu_read_lock();
 
 		cpu = get_rps_cpu(skb->dev, skb, &rflow);
@@ -4806,78 +4864,72 @@ static int netif_rx_internal(struct sk_buff *skb)
 		ret = enqueue_to_backlog(skb, cpu, &rflow->last_qtail);
 
 		rcu_read_unlock();
-		preempt_enable();
 	} else
 #endif
 	{
 		unsigned int qtail;
 
-		ret = enqueue_to_backlog(skb, get_cpu(), &qtail);
-		put_cpu();
+		ret = enqueue_to_backlog(skb, smp_processor_id(), &qtail);
 	}
 	return ret;
 }
 
 /**
+ *	__netif_rx	-	Slightly optimized version of netif_rx
+ *	@skb: buffer to post
+ *
+ *	This behaves as netif_rx except that it does not disable bottom halves.
+ *	As a result this function may only be invoked from the interrupt context
+ *	(either hard or soft interrupt).
+ */
+int __netif_rx(struct sk_buff *skb)
+{
+	int ret;
+
+	lockdep_assert_once(hardirq_count() | softirq_count());
+
+	trace_netif_rx_entry(skb);
+	ret = netif_rx_internal(skb);
+	trace_netif_rx_exit(ret);
+	return ret;
+}
+EXPORT_SYMBOL(__netif_rx);
+
+/**
  *	netif_rx	-	post buffer to the network code
  *	@skb: buffer to post
  *
  *	This function receives a packet from a device driver and queues it for
- *	the upper (protocol) levels to process.  It always succeeds. The buffer
- *	may be dropped during processing for congestion control or by the
- *	protocol layers.
+ *	the upper (protocol) levels to process via the backlog NAPI device. It
+ *	always succeeds. The buffer may be dropped during processing for
+ *	congestion control or by the protocol layers.
+ *	The network buffer is passed via the backlog NAPI device. Modern NIC
+ *	driver should use NAPI and GRO.
+ *	This function can used from interrupt and from process context. The
+ *	caller from process context must not disable interrupts before invoking
+ *	this function.
  *
  *	return values:
  *	NET_RX_SUCCESS	(no congestion)
  *	NET_RX_DROP     (packet was dropped)
  *
  */
-
 int netif_rx(struct sk_buff *skb)
 {
+	bool need_bh_off = !(hardirq_count() | softirq_count());
 	int ret;
 
+	if (need_bh_off)
+		local_bh_disable();
 	trace_netif_rx_entry(skb);
-
 	ret = netif_rx_internal(skb);
 	trace_netif_rx_exit(ret);
-
+	if (need_bh_off)
+		local_bh_enable();
 	return ret;
 }
 EXPORT_SYMBOL(netif_rx);
 
-int netif_rx_ni(struct sk_buff *skb)
-{
-	int err;
-
-	trace_netif_rx_ni_entry(skb);
-
-	preempt_disable();
-	err = netif_rx_internal(skb);
-	if (local_softirq_pending())
-		do_softirq();
-	preempt_enable();
-	trace_netif_rx_ni_exit(err);
-
-	return err;
-}
-EXPORT_SYMBOL(netif_rx_ni);
-
-int netif_rx_any_context(struct sk_buff *skb)
-{
-	/*
-	 * If invoked from contexts which do not invoke bottom half
-	 * processing either at return from interrupt or when softrqs are
-	 * reenabled, use netif_rx_ni() which invokes bottomhalf processing
-	 * directly.
-	 */
-	if (in_interrupt())
-		return netif_rx(skb);
-	else
-		return netif_rx_ni(skb);
-}
-EXPORT_SYMBOL(netif_rx_any_context);
-
 static __latent_entropy void net_tx_action(struct softirq_action *h)
 {
 	struct softnet_data *sd = this_cpu_ptr(&softnet_data);
@@ -5001,7 +5053,7 @@ sch_handle_ingress(struct sk_buff *skb, struct packet_type **pt_prev, int *ret,
 		break;
 	case TC_ACT_SHOT:
 		mini_qdisc_qstats_cpu_drop(miniq);
-		kfree_skb(skb);
+		kfree_skb_reason(skb, SKB_DROP_REASON_TC_INGRESS);
 		return NULL;
 	case TC_ACT_STOLEN:
 	case TC_ACT_QUEUED:
@@ -5318,11 +5370,13 @@ check_vlan_id:
 		*ppt_prev = pt_prev;
 	} else {
 drop:
-		if (!deliver_exact)
-			atomic_long_inc(&skb->dev->rx_dropped);
-		else
-			atomic_long_inc(&skb->dev->rx_nohandler);
-		kfree_skb(skb);
+		if (!deliver_exact) {
+			dev_core_stats_rx_dropped_inc(skb->dev);
+			kfree_skb_reason(skb, SKB_DROP_REASON_PTYPE_ABSENT);
+		} else {
+			dev_core_stats_rx_nohandler_inc(skb->dev);
+			kfree_skb(skb);
+		}
 		/* Jamal, now you will not able to escape explaining
 		 * me how you were going to use this. :-)
 		 */
@@ -5650,8 +5704,7 @@ static void flush_backlog(struct work_struct *work)
 	local_bh_disable();
 	sd = this_cpu_ptr(&softnet_data);
 
-	local_irq_disable();
-	rps_lock(sd);
+	rps_lock_irq_disable(sd);
 	skb_queue_walk_safe(&sd->input_pkt_queue, skb, tmp) {
 		if (skb->dev->reg_state == NETREG_UNREGISTERING) {
 			__skb_unlink(skb, &sd->input_pkt_queue);
@@ -5659,8 +5712,7 @@ static void flush_backlog(struct work_struct *work)
 			input_queue_head_incr(sd);
 		}
 	}
-	rps_unlock(sd);
-	local_irq_enable();
+	rps_unlock_irq_enable(sd);
 
 	skb_queue_walk_safe(&sd->process_queue, skb, tmp) {
 		if (skb->dev->reg_state == NETREG_UNREGISTERING) {
@@ -5678,16 +5730,14 @@ static bool flush_required(int cpu)
 	struct softnet_data *sd = &per_cpu(softnet_data, cpu);
 	bool do_flush;
 
-	local_irq_disable();
-	rps_lock(sd);
+	rps_lock_irq_disable(sd);
 
 	/* as insertion into process_queue happens with the rps lock held,
 	 * process_queue access may race only with dequeue
 	 */
 	do_flush = !skb_queue_empty(&sd->input_pkt_queue) ||
 		   !skb_queue_empty_lockless(&sd->process_queue);
-	rps_unlock(sd);
-	local_irq_enable();
+	rps_unlock_irq_enable(sd);
 
 	return do_flush;
 #endif
@@ -5802,8 +5852,7 @@ static int process_backlog(struct napi_struct *napi, int quota)
 
 		}
 
-		local_irq_disable();
-		rps_lock(sd);
+		rps_lock_irq_disable(sd);
 		if (skb_queue_empty(&sd->input_pkt_queue)) {
 			/*
 			 * Inline a custom version of __napi_complete().
@@ -5819,8 +5868,7 @@ static int process_backlog(struct napi_struct *napi, int quota)
 			skb_queue_splice_tail_init(&sd->input_pkt_queue,
 						   &sd->process_queue);
 		}
-		rps_unlock(sd);
-		local_irq_enable();
+		rps_unlock_irq_enable(sd);
 	}
 
 	return work;
@@ -7727,6 +7775,242 @@ void netdev_bonding_info_change(struct net_device *dev,
 }
 EXPORT_SYMBOL(netdev_bonding_info_change);
 
+static int netdev_offload_xstats_enable_l3(struct net_device *dev,
+					   struct netlink_ext_ack *extack)
+{
+	struct netdev_notifier_offload_xstats_info info = {
+		.info.dev = dev,
+		.info.extack = extack,
+		.type = NETDEV_OFFLOAD_XSTATS_TYPE_L3,
+	};
+	int err;
+	int rc;
+
+	dev->offload_xstats_l3 = kzalloc(sizeof(*dev->offload_xstats_l3),
+					 GFP_KERNEL);
+	if (!dev->offload_xstats_l3)
+		return -ENOMEM;
+
+	rc = call_netdevice_notifiers_info_robust(NETDEV_OFFLOAD_XSTATS_ENABLE,
+						  NETDEV_OFFLOAD_XSTATS_DISABLE,
+						  &info.info);
+	err = notifier_to_errno(rc);
+	if (err)
+		goto free_stats;
+
+	return 0;
+
+free_stats:
+	kfree(dev->offload_xstats_l3);
+	dev->offload_xstats_l3 = NULL;
+	return err;
+}
+
+int netdev_offload_xstats_enable(struct net_device *dev,
+				 enum netdev_offload_xstats_type type,
+				 struct netlink_ext_ack *extack)
+{
+	ASSERT_RTNL();
+
+	if (netdev_offload_xstats_enabled(dev, type))
+		return -EALREADY;
+
+	switch (type) {
+	case NETDEV_OFFLOAD_XSTATS_TYPE_L3:
+		return netdev_offload_xstats_enable_l3(dev, extack);
+	}
+
+	WARN_ON(1);
+	return -EINVAL;
+}
+EXPORT_SYMBOL(netdev_offload_xstats_enable);
+
+static void netdev_offload_xstats_disable_l3(struct net_device *dev)
+{
+	struct netdev_notifier_offload_xstats_info info = {
+		.info.dev = dev,
+		.type = NETDEV_OFFLOAD_XSTATS_TYPE_L3,
+	};
+
+	call_netdevice_notifiers_info(NETDEV_OFFLOAD_XSTATS_DISABLE,
+				      &info.info);
+	kfree(dev->offload_xstats_l3);
+	dev->offload_xstats_l3 = NULL;
+}
+
+int netdev_offload_xstats_disable(struct net_device *dev,
+				  enum netdev_offload_xstats_type type)
+{
+	ASSERT_RTNL();
+
+	if (!netdev_offload_xstats_enabled(dev, type))
+		return -EALREADY;
+
+	switch (type) {
+	case NETDEV_OFFLOAD_XSTATS_TYPE_L3:
+		netdev_offload_xstats_disable_l3(dev);
+		return 0;
+	}
+
+	WARN_ON(1);
+	return -EINVAL;
+}
+EXPORT_SYMBOL(netdev_offload_xstats_disable);
+
+static void netdev_offload_xstats_disable_all(struct net_device *dev)
+{
+	netdev_offload_xstats_disable(dev, NETDEV_OFFLOAD_XSTATS_TYPE_L3);
+}
+
+static struct rtnl_hw_stats64 *
+netdev_offload_xstats_get_ptr(const struct net_device *dev,
+			      enum netdev_offload_xstats_type type)
+{
+	switch (type) {
+	case NETDEV_OFFLOAD_XSTATS_TYPE_L3:
+		return dev->offload_xstats_l3;
+	}
+
+	WARN_ON(1);
+	return NULL;
+}
+
+bool netdev_offload_xstats_enabled(const struct net_device *dev,
+				   enum netdev_offload_xstats_type type)
+{
+	ASSERT_RTNL();
+
+	return netdev_offload_xstats_get_ptr(dev, type);
+}
+EXPORT_SYMBOL(netdev_offload_xstats_enabled);
+
+struct netdev_notifier_offload_xstats_ru {
+	bool used;
+};
+
+struct netdev_notifier_offload_xstats_rd {
+	struct rtnl_hw_stats64 stats;
+	bool used;
+};
+
+static void netdev_hw_stats64_add(struct rtnl_hw_stats64 *dest,
+				  const struct rtnl_hw_stats64 *src)
+{
+	dest->rx_packets	  += src->rx_packets;
+	dest->tx_packets	  += src->tx_packets;
+	dest->rx_bytes		  += src->rx_bytes;
+	dest->tx_bytes		  += src->tx_bytes;
+	dest->rx_errors		  += src->rx_errors;
+	dest->tx_errors		  += src->tx_errors;
+	dest->rx_dropped	  += src->rx_dropped;
+	dest->tx_dropped	  += src->tx_dropped;
+	dest->multicast		  += src->multicast;
+}
+
+static int netdev_offload_xstats_get_used(struct net_device *dev,
+					  enum netdev_offload_xstats_type type,
+					  bool *p_used,
+					  struct netlink_ext_ack *extack)
+{
+	struct netdev_notifier_offload_xstats_ru report_used = {};
+	struct netdev_notifier_offload_xstats_info info = {
+		.info.dev = dev,
+		.info.extack = extack,
+		.type = type,
+		.report_used = &report_used,
+	};
+	int rc;
+
+	WARN_ON(!netdev_offload_xstats_enabled(dev, type));
+	rc = call_netdevice_notifiers_info(NETDEV_OFFLOAD_XSTATS_REPORT_USED,
+					   &info.info);
+	*p_used = report_used.used;
+	return notifier_to_errno(rc);
+}
+
+static int netdev_offload_xstats_get_stats(struct net_device *dev,
+					   enum netdev_offload_xstats_type type,
+					   struct rtnl_hw_stats64 *p_stats,
+					   bool *p_used,
+					   struct netlink_ext_ack *extack)
+{
+	struct netdev_notifier_offload_xstats_rd report_delta = {};
+	struct netdev_notifier_offload_xstats_info info = {
+		.info.dev = dev,
+		.info.extack = extack,
+		.type = type,
+		.report_delta = &report_delta,
+	};
+	struct rtnl_hw_stats64 *stats;
+	int rc;
+
+	stats = netdev_offload_xstats_get_ptr(dev, type);
+	if (WARN_ON(!stats))
+		return -EINVAL;
+
+	rc = call_netdevice_notifiers_info(NETDEV_OFFLOAD_XSTATS_REPORT_DELTA,
+					   &info.info);
+
+	/* Cache whatever we got, even if there was an error, otherwise the
+	 * successful stats retrievals would get lost.
+	 */
+	netdev_hw_stats64_add(stats, &report_delta.stats);
+
+	if (p_stats)
+		*p_stats = *stats;
+	*p_used = report_delta.used;
+
+	return notifier_to_errno(rc);
+}
+
+int netdev_offload_xstats_get(struct net_device *dev,
+			      enum netdev_offload_xstats_type type,
+			      struct rtnl_hw_stats64 *p_stats, bool *p_used,
+			      struct netlink_ext_ack *extack)
+{
+	ASSERT_RTNL();
+
+	if (p_stats)
+		return netdev_offload_xstats_get_stats(dev, type, p_stats,
+						       p_used, extack);
+	else
+		return netdev_offload_xstats_get_used(dev, type, p_used,
+						      extack);
+}
+EXPORT_SYMBOL(netdev_offload_xstats_get);
+
+void
+netdev_offload_xstats_report_delta(struct netdev_notifier_offload_xstats_rd *report_delta,
+				   const struct rtnl_hw_stats64 *stats)
+{
+	report_delta->used = true;
+	netdev_hw_stats64_add(&report_delta->stats, stats);
+}
+EXPORT_SYMBOL(netdev_offload_xstats_report_delta);
+
+void
+netdev_offload_xstats_report_used(struct netdev_notifier_offload_xstats_ru *report_used)
+{
+	report_used->used = true;
+}
+EXPORT_SYMBOL(netdev_offload_xstats_report_used);
+
+void netdev_offload_xstats_push_delta(struct net_device *dev,
+				      enum netdev_offload_xstats_type type,
+				      const struct rtnl_hw_stats64 *p_stats)
+{
+	struct rtnl_hw_stats64 *stats;
+
+	ASSERT_RTNL();
+
+	stats = netdev_offload_xstats_get_ptr(dev, type);
+	if (WARN_ON(!stats))
+		return;
+
+	netdev_hw_stats64_add(stats, p_stats);
+}
+EXPORT_SYMBOL(netdev_offload_xstats_push_delta);
+
 /**
  * netdev_get_xmit_slave - Get the xmit slave of master device
  * @dev: device
@@ -9143,7 +9427,7 @@ DECLARE_WAIT_QUEUE_HEAD(netdev_unregistering_wq);
 static void net_set_todo(struct net_device *dev)
 {
 	list_add_tail(&dev->todo_list, &net_todo_list);
-	dev_net(dev)->dev_unreg_count++;
+	atomic_inc(&dev_net(dev)->dev_unreg_count);
 }
 
 static netdev_features_t netdev_sync_upper_features(struct net_device *lower,
@@ -9683,8 +9967,10 @@ int register_netdevice(struct net_device *dev)
 	linkwatch_init_dev(dev);
 
 	dev_init_scheduler(dev);
-	dev_hold(dev);
+
+	dev_hold_track(dev, &dev->dev_registered_tracker, GFP_KERNEL);
 	list_netdevice(dev);
+
 	add_device_randomness(dev->dev_addr, dev->addr_len);
 
 	/* If the device has permanent device address, driver should
@@ -9813,8 +10099,8 @@ int netdev_unregister_timeout_secs __read_mostly = 10;
 #define WAIT_REFS_MIN_MSECS 1
 #define WAIT_REFS_MAX_MSECS 250
 /**
- * netdev_wait_allrefs - wait until all references are gone.
- * @dev: target net_device
+ * netdev_wait_allrefs_any - wait until all references are gone.
+ * @list: list of net_devices to wait on
  *
  * This is called when unregistering network devices.
  *
@@ -9824,37 +10110,42 @@ int netdev_unregister_timeout_secs __read_mostly = 10;
  * We can get stuck here if buggy protocols don't correctly
  * call dev_put.
  */
-static void netdev_wait_allrefs(struct net_device *dev)
+static struct net_device *netdev_wait_allrefs_any(struct list_head *list)
 {
 	unsigned long rebroadcast_time, warning_time;
-	int wait = 0, refcnt;
-
-	linkwatch_forget_dev(dev);
+	struct net_device *dev;
+	int wait = 0;
 
 	rebroadcast_time = warning_time = jiffies;
-	refcnt = netdev_refcnt_read(dev);
 
-	while (refcnt != 1) {
+	list_for_each_entry(dev, list, todo_list)
+		if (netdev_refcnt_read(dev) == 1)
+			return dev;
+
+	while (true) {
 		if (time_after(jiffies, rebroadcast_time + 1 * HZ)) {
 			rtnl_lock();
 
 			/* Rebroadcast unregister notification */
-			call_netdevice_notifiers(NETDEV_UNREGISTER, dev);
+			list_for_each_entry(dev, list, todo_list)
+				call_netdevice_notifiers(NETDEV_UNREGISTER, dev);
 
 			__rtnl_unlock();
 			rcu_barrier();
 			rtnl_lock();
 
-			if (test_bit(__LINK_STATE_LINKWATCH_PENDING,
-				     &dev->state)) {
-				/* We must not have linkwatch events
-				 * pending on unregister. If this
-				 * happens, we simply run the queue
-				 * unscheduled, resulting in a noop
-				 * for this device.
-				 */
-				linkwatch_run_queue();
-			}
+			list_for_each_entry(dev, list, todo_list)
+				if (test_bit(__LINK_STATE_LINKWATCH_PENDING,
+					     &dev->state)) {
+					/* We must not have linkwatch events
+					 * pending on unregister. If this
+					 * happens, we simply run the queue
+					 * unscheduled, resulting in a noop
+					 * for this device.
+					 */
+					linkwatch_run_queue();
+					break;
+				}
 
 			__rtnl_unlock();
 
@@ -9869,14 +10160,18 @@ static void netdev_wait_allrefs(struct net_device *dev)
 			wait = min(wait << 1, WAIT_REFS_MAX_MSECS);
 		}
 
-		refcnt = netdev_refcnt_read(dev);
+		list_for_each_entry(dev, list, todo_list)
+			if (netdev_refcnt_read(dev) == 1)
+				return dev;
 
-		if (refcnt != 1 &&
-		    time_after(jiffies, warning_time +
+		if (time_after(jiffies, warning_time +
 			       netdev_unregister_timeout_secs * HZ)) {
-			pr_emerg("unregister_netdevice: waiting for %s to become free. Usage count = %d\n",
-				 dev->name, refcnt);
-			ref_tracker_dir_print(&dev->refcnt_tracker, 10);
+			list_for_each_entry(dev, list, todo_list) {
+				pr_emerg("unregister_netdevice: waiting for %s to become free. Usage count = %d\n",
+					 dev->name, netdev_refcnt_read(dev));
+				ref_tracker_dir_print(&dev->refcnt_tracker, 10);
+			}
+
 			warning_time = jiffies;
 		}
 	}
@@ -9908,6 +10203,7 @@ static void netdev_wait_allrefs(struct net_device *dev)
  */
 void netdev_run_todo(void)
 {
+	struct net_device *dev, *tmp;
 	struct list_head list;
 #ifdef CONFIG_LOCKDEP
 	struct list_head unlink_list;
@@ -9928,26 +10224,24 @@ void netdev_run_todo(void)
 
 	__rtnl_unlock();
 
-
 	/* Wait for rcu callbacks to finish before next phase */
 	if (!list_empty(&list))
 		rcu_barrier();
 
-	while (!list_empty(&list)) {
-		struct net_device *dev
-			= list_first_entry(&list, struct net_device, todo_list);
-		list_del(&dev->todo_list);
-
+	list_for_each_entry_safe(dev, tmp, &list, todo_list) {
 		if (unlikely(dev->reg_state != NETREG_UNREGISTERING)) {
-			pr_err("network todo '%s' but state %d\n",
-			       dev->name, dev->reg_state);
-			dump_stack();
+			netdev_WARN(dev, "run_todo but not unregistering\n");
+			list_del(&dev->todo_list);
 			continue;
 		}
 
 		dev->reg_state = NETREG_UNREGISTERED;
+		linkwatch_forget_dev(dev);
+	}
 
-		netdev_wait_allrefs(dev);
+	while (!list_empty(&list)) {
+		dev = netdev_wait_allrefs_any(&list);
+		list_del(&dev->todo_list);
 
 		/* paranoia */
 		BUG_ON(netdev_refcnt_read(dev) != 1);
@@ -9963,11 +10257,8 @@ void netdev_run_todo(void)
 		if (dev->needs_free_netdev)
 			free_netdev(dev);
 
-		/* Report a network device has been unregistered */
-		rtnl_lock();
-		dev_net(dev)->dev_unreg_count--;
-		__rtnl_unlock();
-		wake_up(&netdev_unregistering_wq);
+		if (atomic_dec_and_test(&dev_net(dev)->dev_unreg_count))
+			wake_up(&netdev_unregistering_wq);
 
 		/* Free network device */
 		kobject_put(&dev->dev.kobj);
@@ -10003,6 +10294,25 @@ void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
 }
 EXPORT_SYMBOL(netdev_stats_to_stats64);
 
+struct net_device_core_stats *netdev_core_stats_alloc(struct net_device *dev)
+{
+	struct net_device_core_stats __percpu *p;
+
+	p = alloc_percpu_gfp(struct net_device_core_stats,
+			     GFP_ATOMIC | __GFP_NOWARN);
+
+	if (p && cmpxchg(&dev->core_stats, NULL, p))
+		free_percpu(p);
+
+	/* This READ_ONCE() pairs with the cmpxchg() above */
+	p = READ_ONCE(dev->core_stats);
+	if (!p)
+		return NULL;
+
+	return this_cpu_ptr(p);
+}
+EXPORT_SYMBOL(netdev_core_stats_alloc);
+
 /**
  *	dev_get_stats	- get network device statistics
  *	@dev: device to get statistics from
@@ -10017,6 +10327,7 @@ struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
 					struct rtnl_link_stats64 *storage)
 {
 	const struct net_device_ops *ops = dev->netdev_ops;
+	const struct net_device_core_stats __percpu *p;
 
 	if (ops->ndo_get_stats64) {
 		memset(storage, 0, sizeof(*storage));
@@ -10026,9 +10337,20 @@ struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
 	} else {
 		netdev_stats_to_stats64(storage, &dev->stats);
 	}
-	storage->rx_dropped += (unsigned long)atomic_long_read(&dev->rx_dropped);
-	storage->tx_dropped += (unsigned long)atomic_long_read(&dev->tx_dropped);
-	storage->rx_nohandler += (unsigned long)atomic_long_read(&dev->rx_nohandler);
+
+	/* This READ_ONCE() pairs with the write in netdev_core_stats_alloc() */
+	p = READ_ONCE(dev->core_stats);
+	if (p) {
+		const struct net_device_core_stats *core_stats;
+		int i;
+
+		for_each_possible_cpu(i) {
+			core_stats = per_cpu_ptr(p, i);
+			storage->rx_dropped += local_read(&core_stats->rx_dropped);
+			storage->tx_dropped += local_read(&core_stats->tx_dropped);
+			storage->rx_nohandler += local_read(&core_stats->rx_nohandler);
+		}
+	}
 	return storage;
 }
 EXPORT_SYMBOL(dev_get_stats);
@@ -10172,7 +10494,7 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
 	dev->pcpu_refcnt = alloc_percpu(int);
 	if (!dev->pcpu_refcnt)
 		goto free_dev;
-	dev_hold(dev);
+	__dev_hold(dev);
 #else
 	refcount_set(&dev->dev_refcnt, 1);
 #endif
@@ -10290,6 +10612,8 @@ void free_netdev(struct net_device *dev)
 	free_percpu(dev->pcpu_refcnt);
 	dev->pcpu_refcnt = NULL;
 #endif
+	free_percpu(dev->core_stats);
+	dev->core_stats = NULL;
 	free_percpu(dev->xdp_bulkq);
 	dev->xdp_bulkq = NULL;
 
@@ -10409,6 +10733,8 @@ void unregister_netdevice_many(struct list_head *head)
 
 		dev_xdp_uninstall(dev);
 
+		netdev_offload_xstats_disable_all(dev);
+
 		/* Notify protocols, that we are about to destroy
 		 * this device. They should clean all the things.
 		 */
@@ -10449,7 +10775,7 @@ void unregister_netdevice_many(struct list_head *head)
 	synchronize_net();
 
 	list_for_each_entry(dev, head, unreg_list) {
-		dev_put(dev);
+		dev_put_track(dev, &dev->dev_registered_tracker);
 		net_set_todo(dev);
 	}
 
@@ -10674,11 +11000,11 @@ static int dev_cpu_dead(unsigned int oldcpu)
 
 	/* Process offline CPU's input_pkt_queue */
 	while ((skb = __skb_dequeue(&oldsd->process_queue))) {
-		netif_rx_ni(skb);
+		netif_rx(skb);
 		input_queue_head_incr(oldsd);
 	}
 	while ((skb = skb_dequeue(&oldsd->input_pkt_queue))) {
-		netif_rx_ni(skb);
+		netif_rx(skb);
 		input_queue_head_incr(oldsd);
 	}
 
@@ -10732,8 +11058,7 @@ static int __net_init netdev_init(struct net *net)
 	BUILD_BUG_ON(GRO_HASH_BUCKETS >
 		     8 * sizeof_field(struct napi_struct, gro_bitmask));
 
-	if (net != &init_net)
-		INIT_LIST_HEAD(&net->dev_base_head);
+	INIT_LIST_HEAD(&net->dev_base_head);
 
 	net->dev_name_head = netdev_create_hash();
 	if (net->dev_name_head == NULL)
@@ -10849,14 +11174,14 @@ static struct pernet_operations __net_initdata netdev_net_ops = {
 	.exit = netdev_exit,
 };
 
-static void __net_exit default_device_exit(struct net *net)
+static void __net_exit default_device_exit_net(struct net *net)
 {
 	struct net_device *dev, *aux;
 	/*
 	 * Push all migratable network devices back to the
 	 * initial network namespace
 	 */
-	rtnl_lock();
+	ASSERT_RTNL();
 	for_each_netdev_safe(net, dev, aux) {
 		int err;
 		char fb_name[IFNAMSIZ];
@@ -10880,35 +11205,6 @@ static void __net_exit default_device_exit(struct net *net)
 			BUG();
 		}
 	}
-	rtnl_unlock();
-}
-
-static void __net_exit rtnl_lock_unregistering(struct list_head *net_list)
-{
-	/* Return with the rtnl_lock held when there are no network
-	 * devices unregistering in any network namespace in net_list.
-	 */
-	struct net *net;
-	bool unregistering;
-	DEFINE_WAIT_FUNC(wait, woken_wake_function);
-
-	add_wait_queue(&netdev_unregistering_wq, &wait);
-	for (;;) {
-		unregistering = false;
-		rtnl_lock();
-		list_for_each_entry(net, net_list, exit_list) {
-			if (net->dev_unreg_count > 0) {
-				unregistering = true;
-				break;
-			}
-		}
-		if (!unregistering)
-			break;
-		__rtnl_unlock();
-
-		wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
-	}
-	remove_wait_queue(&netdev_unregistering_wq, &wait);
 }
 
 static void __net_exit default_device_exit_batch(struct list_head *net_list)
@@ -10922,18 +11218,12 @@ static void __net_exit default_device_exit_batch(struct list_head *net_list)
 	struct net *net;
 	LIST_HEAD(dev_kill_list);
 
-	/* To prevent network device cleanup code from dereferencing
-	 * loopback devices or network devices that have been freed
-	 * wait here for all pending unregistrations to complete,
-	 * before unregistring the loopback device and allowing the
-	 * network namespace be freed.
-	 *
-	 * The netdev todo list containing all network devices
-	 * unregistrations that happen in default_device_exit_batch
-	 * will run in the rtnl_unlock() at the end of
-	 * default_device_exit_batch.
-	 */
-	rtnl_lock_unregistering(net_list);
+	rtnl_lock();
+	list_for_each_entry(net, net_list, exit_list) {
+		default_device_exit_net(net);
+		cond_resched();
+	}
+
 	list_for_each_entry(net, net_list, exit_list) {
 		for_each_netdev_reverse(net, dev) {
 			if (dev->rtnl_link_ops && dev->rtnl_link_ops->dellink)
@@ -10947,7 +11237,6 @@ static void __net_exit default_device_exit_batch(struct list_head *net_list)
 }
 
 static struct pernet_operations __net_initdata default_device_ops = {
-	.exit = default_device_exit,
 	.exit_batch = default_device_exit_batch,
 };
 
diff --git a/net/core/devlink.c b/net/core/devlink.c
index fcd9f6d85cf1..aeca13b6e57b 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -225,6 +225,33 @@ struct devlink *__must_check devlink_try_get(struct devlink *devlink)
 	return NULL;
 }
 
+void devl_assert_locked(struct devlink *devlink)
+{
+	lockdep_assert_held(&devlink->lock);
+}
+EXPORT_SYMBOL_GPL(devl_assert_locked);
+
+#ifdef CONFIG_LOCKDEP
+/* For use in conjunction with LOCKDEP only e.g. rcu_dereference_protected() */
+bool devl_lock_is_held(struct devlink *devlink)
+{
+	return lockdep_is_held(&devlink->lock);
+}
+EXPORT_SYMBOL_GPL(devl_lock_is_held);
+#endif
+
+void devl_lock(struct devlink *devlink)
+{
+	mutex_lock(&devlink->lock);
+}
+EXPORT_SYMBOL_GPL(devl_lock);
+
+void devl_unlock(struct devlink *devlink)
+{
+	mutex_unlock(&devlink->lock);
+}
+EXPORT_SYMBOL_GPL(devl_unlock);
+
 static struct devlink *devlink_get_from_attrs(struct net *net,
 					      struct nlattr **attrs)
 {
@@ -1541,35 +1568,20 @@ static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb,
 	return 0;
 }
 
-static int devlink_port_split(struct devlink *devlink, u32 port_index,
-			      u32 count, struct netlink_ext_ack *extack)
-
-{
-	if (devlink->ops->port_split)
-		return devlink->ops->port_split(devlink, port_index, count,
-						extack);
-	return -EOPNOTSUPP;
-}
-
 static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb,
 					  struct genl_info *info)
 {
+	struct devlink_port *devlink_port = info->user_ptr[1];
 	struct devlink *devlink = info->user_ptr[0];
-	struct devlink_port *devlink_port;
-	u32 port_index;
 	u32 count;
 
-	if (!info->attrs[DEVLINK_ATTR_PORT_INDEX] ||
-	    !info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT])
+	if (!info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT])
 		return -EINVAL;
+	if (!devlink->ops->port_split)
+		return -EOPNOTSUPP;
 
-	devlink_port = devlink_port_get_from_info(devlink, info);
-	port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
 	count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
 
-	if (IS_ERR(devlink_port))
-		return -EINVAL;
-
 	if (!devlink_port->attrs.splittable) {
 		/* Split ports cannot be split. */
 		if (devlink_port->attrs.split)
@@ -1584,29 +1596,19 @@ static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb,
 		return -EINVAL;
 	}
 
-	return devlink_port_split(devlink, port_index, count, info->extack);
-}
-
-static int devlink_port_unsplit(struct devlink *devlink, u32 port_index,
-				struct netlink_ext_ack *extack)
-
-{
-	if (devlink->ops->port_unsplit)
-		return devlink->ops->port_unsplit(devlink, port_index, extack);
-	return -EOPNOTSUPP;
+	return devlink->ops->port_split(devlink, devlink_port, count,
+					info->extack);
 }
 
 static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb,
 					    struct genl_info *info)
 {
+	struct devlink_port *devlink_port = info->user_ptr[1];
 	struct devlink *devlink = info->user_ptr[0];
-	u32 port_index;
 
-	if (!info->attrs[DEVLINK_ATTR_PORT_INDEX])
-		return -EINVAL;
-
-	port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
-	return devlink_port_unsplit(devlink, port_index, info->extack);
+	if (!devlink->ops->port_unsplit)
+		return -EOPNOTSUPP;
+	return devlink->ops->port_unsplit(devlink, devlink_port, info->extack);
 }
 
 static int devlink_port_new_notifiy(struct devlink *devlink,
@@ -2866,15 +2868,11 @@ static int devlink_rate_nodes_check(struct devlink *devlink, u16 mode,
 {
 	struct devlink_rate *devlink_rate;
 
-	/* Take the lock to sync with devlink_rate_nodes_destroy() */
-	mutex_lock(&devlink->lock);
 	list_for_each_entry(devlink_rate, &devlink->rate_list, list)
 		if (devlink_rate_is_node(devlink_rate)) {
-			mutex_unlock(&devlink->lock);
 			NL_SET_ERR_MSG_MOD(extack, "Rate node(s) exists.");
 			return -EBUSY;
 		}
-	mutex_unlock(&devlink->lock);
 	return 0;
 }
 
@@ -8645,14 +8643,14 @@ static const struct genl_small_ops devlink_nl_ops[] = {
 		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 		.doit = devlink_nl_cmd_port_split_doit,
 		.flags = GENL_ADMIN_PERM,
-		.internal_flags = DEVLINK_NL_FLAG_NO_LOCK,
+		.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
 	},
 	{
 		.cmd = DEVLINK_CMD_PORT_UNSPLIT,
 		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 		.doit = devlink_nl_cmd_port_unsplit_doit,
 		.flags = GENL_ADMIN_PERM,
-		.internal_flags = DEVLINK_NL_FLAG_NO_LOCK,
+		.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
 	},
 	{
 		.cmd = DEVLINK_CMD_PORT_NEW,
@@ -8733,14 +8731,12 @@ static const struct genl_small_ops devlink_nl_ops[] = {
 		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 		.doit = devlink_nl_cmd_eswitch_get_doit,
 		.flags = GENL_ADMIN_PERM,
-		.internal_flags = DEVLINK_NL_FLAG_NO_LOCK,
 	},
 	{
 		.cmd = DEVLINK_CMD_ESWITCH_SET,
 		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 		.doit = devlink_nl_cmd_eswitch_set_doit,
 		.flags = GENL_ADMIN_PERM,
-		.internal_flags = DEVLINK_NL_FLAG_NO_LOCK,
 	},
 	{
 		.cmd = DEVLINK_CMD_DPIPE_TABLE_GET,
@@ -9249,6 +9245,32 @@ static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port)
 	cancel_delayed_work_sync(&devlink_port->type_warn_dw);
 }
 
+int devl_port_register(struct devlink *devlink,
+		       struct devlink_port *devlink_port,
+		       unsigned int port_index)
+{
+	lockdep_assert_held(&devlink->lock);
+
+	if (devlink_port_index_exists(devlink, port_index))
+		return -EEXIST;
+
+	WARN_ON(devlink_port->devlink);
+	devlink_port->devlink = devlink;
+	devlink_port->index = port_index;
+	spin_lock_init(&devlink_port->type_lock);
+	INIT_LIST_HEAD(&devlink_port->reporter_list);
+	mutex_init(&devlink_port->reporters_lock);
+	list_add_tail(&devlink_port->list, &devlink->port_list);
+	INIT_LIST_HEAD(&devlink_port->param_list);
+	INIT_LIST_HEAD(&devlink_port->region_list);
+
+	INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
+	devlink_port_type_warn_schedule(devlink_port);
+	devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(devl_port_register);
+
 /**
  *	devlink_port_register - Register devlink port
  *
@@ -9266,29 +9288,28 @@ int devlink_port_register(struct devlink *devlink,
 			  struct devlink_port *devlink_port,
 			  unsigned int port_index)
 {
-	mutex_lock(&devlink->lock);
-	if (devlink_port_index_exists(devlink, port_index)) {
-		mutex_unlock(&devlink->lock);
-		return -EEXIST;
-	}
+	int err;
 
-	WARN_ON(devlink_port->devlink);
-	devlink_port->devlink = devlink;
-	devlink_port->index = port_index;
-	spin_lock_init(&devlink_port->type_lock);
-	INIT_LIST_HEAD(&devlink_port->reporter_list);
-	mutex_init(&devlink_port->reporters_lock);
-	list_add_tail(&devlink_port->list, &devlink->port_list);
-	INIT_LIST_HEAD(&devlink_port->param_list);
-	INIT_LIST_HEAD(&devlink_port->region_list);
+	mutex_lock(&devlink->lock);
+	err = devl_port_register(devlink, devlink_port, port_index);
 	mutex_unlock(&devlink->lock);
-	INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
-	devlink_port_type_warn_schedule(devlink_port);
-	devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
-	return 0;
+	return err;
 }
 EXPORT_SYMBOL_GPL(devlink_port_register);
 
+void devl_port_unregister(struct devlink_port *devlink_port)
+{
+	lockdep_assert_held(&devlink_port->devlink->lock);
+
+	devlink_port_type_warn_cancel(devlink_port);
+	devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
+	list_del(&devlink_port->list);
+	WARN_ON(!list_empty(&devlink_port->reporter_list));
+	WARN_ON(!list_empty(&devlink_port->region_list));
+	mutex_destroy(&devlink_port->reporters_lock);
+}
+EXPORT_SYMBOL_GPL(devl_port_unregister);
+
 /**
  *	devlink_port_unregister - Unregister devlink port
  *
@@ -9298,14 +9319,9 @@ void devlink_port_unregister(struct devlink_port *devlink_port)
 {
 	struct devlink *devlink = devlink_port->devlink;
 
-	devlink_port_type_warn_cancel(devlink_port);
-	devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
 	mutex_lock(&devlink->lock);
-	list_del(&devlink_port->list);
+	devl_port_unregister(devlink_port);
 	mutex_unlock(&devlink->lock);
-	WARN_ON(!list_empty(&devlink_port->reporter_list));
-	WARN_ON(!list_empty(&devlink_port->region_list));
-	mutex_destroy(&devlink_port->reporters_lock);
 }
 EXPORT_SYMBOL_GPL(devlink_port_unregister);
 
@@ -9526,30 +9542,26 @@ void devlink_port_attrs_pci_sf_set(struct devlink_port *devlink_port, u32 contro
 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_sf_set);
 
 /**
- * devlink_rate_leaf_create - create devlink rate leaf
- *
+ * devl_rate_leaf_create - create devlink rate leaf
  * @devlink_port: devlink port object to create rate object on
  * @priv: driver private data
  *
  * Create devlink rate object of type leaf on provided @devlink_port.
- * Throws call trace if @devlink_port already has a devlink rate object.
- *
- * Context: Takes and release devlink->lock <mutex>.
- *
- * Return: -ENOMEM if failed to allocate rate object, 0 otherwise.
  */
-int
-devlink_rate_leaf_create(struct devlink_port *devlink_port, void *priv)
+int devl_rate_leaf_create(struct devlink_port *devlink_port, void *priv)
 {
 	struct devlink *devlink = devlink_port->devlink;
 	struct devlink_rate *devlink_rate;
 
+	devl_assert_locked(devlink_port->devlink);
+
+	if (WARN_ON(devlink_port->devlink_rate))
+		return -EBUSY;
+
 	devlink_rate = kzalloc(sizeof(*devlink_rate), GFP_KERNEL);
 	if (!devlink_rate)
 		return -ENOMEM;
 
-	mutex_lock(&devlink->lock);
-	WARN_ON(devlink_port->devlink_rate);
 	devlink_rate->type = DEVLINK_RATE_TYPE_LEAF;
 	devlink_rate->devlink = devlink;
 	devlink_rate->devlink_port = devlink_port;
@@ -9557,12 +9569,42 @@ devlink_rate_leaf_create(struct devlink_port *devlink_port, void *priv)
 	list_add_tail(&devlink_rate->list, &devlink->rate_list);
 	devlink_port->devlink_rate = devlink_rate;
 	devlink_rate_notify(devlink_rate, DEVLINK_CMD_RATE_NEW);
-	mutex_unlock(&devlink->lock);
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(devl_rate_leaf_create);
+
+int
+devlink_rate_leaf_create(struct devlink_port *devlink_port, void *priv)
+{
+	struct devlink *devlink = devlink_port->devlink;
+	int ret;
+
+	mutex_lock(&devlink->lock);
+	ret = devl_rate_leaf_create(devlink_port, priv);
+	mutex_unlock(&devlink->lock);
+
+	return ret;
+}
 EXPORT_SYMBOL_GPL(devlink_rate_leaf_create);
 
+void devl_rate_leaf_destroy(struct devlink_port *devlink_port)
+{
+	struct devlink_rate *devlink_rate = devlink_port->devlink_rate;
+
+	devl_assert_locked(devlink_port->devlink);
+	if (!devlink_rate)
+		return;
+
+	devlink_rate_notify(devlink_rate, DEVLINK_CMD_RATE_DEL);
+	if (devlink_rate->parent)
+		refcount_dec(&devlink_rate->parent->refcnt);
+	list_del(&devlink_rate->list);
+	devlink_port->devlink_rate = NULL;
+	kfree(devlink_rate);
+}
+EXPORT_SYMBOL_GPL(devl_rate_leaf_destroy);
+
 /**
  * devlink_rate_leaf_destroy - destroy devlink rate leaf
  *
@@ -9579,32 +9621,25 @@ void devlink_rate_leaf_destroy(struct devlink_port *devlink_port)
 		return;
 
 	mutex_lock(&devlink->lock);
-	devlink_rate_notify(devlink_rate, DEVLINK_CMD_RATE_DEL);
-	if (devlink_rate->parent)
-		refcount_dec(&devlink_rate->parent->refcnt);
-	list_del(&devlink_rate->list);
-	devlink_port->devlink_rate = NULL;
+	devl_rate_leaf_destroy(devlink_port);
 	mutex_unlock(&devlink->lock);
-	kfree(devlink_rate);
 }
 EXPORT_SYMBOL_GPL(devlink_rate_leaf_destroy);
 
 /**
- * devlink_rate_nodes_destroy - destroy all devlink rate nodes on device
- *
+ * devl_rate_nodes_destroy - destroy all devlink rate nodes on device
  * @devlink: devlink instance
  *
  * Unset parent for all rate objects and destroy all rate nodes
  * on specified device.
- *
- * Context: Takes and release devlink->lock <mutex>.
  */
-void devlink_rate_nodes_destroy(struct devlink *devlink)
+void devl_rate_nodes_destroy(struct devlink *devlink)
 {
 	static struct devlink_rate *devlink_rate, *tmp;
 	const struct devlink_ops *ops = devlink->ops;
 
-	mutex_lock(&devlink->lock);
+	devl_assert_locked(devlink);
+
 	list_for_each_entry(devlink_rate, &devlink->rate_list, list) {
 		if (!devlink_rate->parent)
 			continue;
@@ -9625,6 +9660,23 @@ void devlink_rate_nodes_destroy(struct devlink *devlink)
 			kfree(devlink_rate);
 		}
 	}
+}
+EXPORT_SYMBOL_GPL(devl_rate_nodes_destroy);
+
+/**
+ * devlink_rate_nodes_destroy - destroy all devlink rate nodes on device
+ *
+ * @devlink: devlink instance
+ *
+ * Unset parent for all rate objects and destroy all rate nodes
+ * on specified device.
+ *
+ * Context: Takes and release devlink->lock <mutex>.
+ */
+void devlink_rate_nodes_destroy(struct devlink *devlink)
+{
+	mutex_lock(&devlink->lock);
+	devl_rate_nodes_destroy(devlink);
 	mutex_unlock(&devlink->lock);
 }
 EXPORT_SYMBOL_GPL(devlink_rate_nodes_destroy);
diff --git a/net/core/drop_monitor.c b/net/core/drop_monitor.c
index d5dc6be2522c..b89e3e95bffc 100644
--- a/net/core/drop_monitor.c
+++ b/net/core/drop_monitor.c
@@ -48,10 +48,22 @@
 static int trace_state = TRACE_OFF;
 static bool monitor_hw;
 
+#undef EM
+#undef EMe
+
+#define EM(a, b)	[a] = #b,
+#define EMe(a, b)	[a] = #b
+
+/* drop_reasons is used to translate 'enum skb_drop_reason' to string,
+ * which is reported to user space.
+ */
+static const char * const drop_reasons[] = {
+	TRACE_SKB_DROP_REASON
+};
+
 /* net_dm_mutex
  *
  * An overall lock guarding every operation coming from userspace.
- * It also guards the global 'hw_stats_list' list.
  */
 static DEFINE_MUTEX(net_dm_mutex);
 
@@ -87,11 +99,9 @@ struct per_cpu_dm_data {
 };
 
 struct dm_hw_stat_delta {
-	struct net_device *dev;
 	unsigned long last_rx;
-	struct list_head list;
-	struct rcu_head rcu;
 	unsigned long last_drop_val;
+	struct rcu_head rcu;
 };
 
 static struct genl_family net_drop_monitor_family;
@@ -102,7 +112,6 @@ static DEFINE_PER_CPU(struct per_cpu_dm_data, dm_hw_cpu_data);
 static int dm_hit_limit = 64;
 static int dm_delay = 1;
 static unsigned long dm_hw_check_delta = 2*HZ;
-static LIST_HEAD(hw_stats_list);
 
 static enum net_dm_alert_mode net_dm_alert_mode = NET_DM_ALERT_MODE_SUMMARY;
 static u32 net_dm_trunc_len;
@@ -126,6 +135,7 @@ struct net_dm_skb_cb {
 		struct devlink_trap_metadata *hw_metadata;
 		void *pc;
 	};
+	enum skb_drop_reason reason;
 };
 
 #define NET_DM_SKB_CB(__skb) ((struct net_dm_skb_cb *)&((__skb)->cb[0]))
@@ -273,33 +283,27 @@ static void trace_kfree_skb_hit(void *ignore, struct sk_buff *skb,
 static void trace_napi_poll_hit(void *ignore, struct napi_struct *napi,
 				int work, int budget)
 {
-	struct dm_hw_stat_delta *new_stat;
-
+	struct net_device *dev = napi->dev;
+	struct dm_hw_stat_delta *stat;
 	/*
 	 * Don't check napi structures with no associated device
 	 */
-	if (!napi->dev)
+	if (!dev)
 		return;
 
 	rcu_read_lock();
-	list_for_each_entry_rcu(new_stat, &hw_stats_list, list) {
-		struct net_device *dev;
-
+	stat = rcu_dereference(dev->dm_private);
+	if (stat) {
 		/*
 		 * only add a note to our monitor buffer if:
-		 * 1) this is the dev we received on
-		 * 2) its after the last_rx delta
-		 * 3) our rx_dropped count has gone up
+		 * 1) its after the last_rx delta
+		 * 2) our rx_dropped count has gone up
 		 */
-		/* Paired with WRITE_ONCE() in dropmon_net_event() */
-		dev = READ_ONCE(new_stat->dev);
-		if ((dev == napi->dev)  &&
-		    (time_after(jiffies, new_stat->last_rx + dm_hw_check_delta)) &&
-		    (napi->dev->stats.rx_dropped != new_stat->last_drop_val)) {
+		if (time_after(jiffies, stat->last_rx + dm_hw_check_delta) &&
+		    (dev->stats.rx_dropped != stat->last_drop_val)) {
 			trace_drop_common(NULL, NULL);
-			new_stat->last_drop_val = napi->dev->stats.rx_dropped;
-			new_stat->last_rx = jiffies;
-			break;
+			stat->last_drop_val = dev->stats.rx_dropped;
+			stat->last_rx = jiffies;
 		}
 	}
 	rcu_read_unlock();
@@ -502,6 +506,7 @@ static void net_dm_packet_trace_kfree_skb_hit(void *ignore,
 {
 	ktime_t tstamp = ktime_get_real();
 	struct per_cpu_dm_data *data;
+	struct net_dm_skb_cb *cb;
 	struct sk_buff *nskb;
 	unsigned long flags;
 
@@ -512,7 +517,11 @@ static void net_dm_packet_trace_kfree_skb_hit(void *ignore,
 	if (!nskb)
 		return;
 
-	NET_DM_SKB_CB(nskb)->pc = location;
+	if ((unsigned int)reason >= SKB_DROP_REASON_MAX)
+		reason = SKB_DROP_REASON_NOT_SPECIFIED;
+	cb = NET_DM_SKB_CB(nskb);
+	cb->reason = reason;
+	cb->pc = location;
 	/* Override the timestamp because we care about the time when the
 	 * packet was dropped.
 	 */
@@ -557,7 +566,8 @@ static size_t net_dm_in_port_size(void)
 
 #define NET_DM_MAX_SYMBOL_LEN 40
 
-static size_t net_dm_packet_report_size(size_t payload_len)
+static size_t net_dm_packet_report_size(size_t payload_len,
+					enum skb_drop_reason reason)
 {
 	size_t size;
 
@@ -578,6 +588,8 @@ static size_t net_dm_packet_report_size(size_t payload_len)
 	       nla_total_size(sizeof(u32)) +
 	       /* NET_DM_ATTR_PROTO */
 	       nla_total_size(sizeof(u16)) +
+	       /* NET_DM_ATTR_REASON */
+	       nla_total_size(strlen(drop_reasons[reason]) + 1) +
 	       /* NET_DM_ATTR_PAYLOAD */
 	       nla_total_size(payload_len);
 }
@@ -610,7 +622,7 @@ nla_put_failure:
 static int net_dm_packet_report_fill(struct sk_buff *msg, struct sk_buff *skb,
 				     size_t payload_len)
 {
-	u64 pc = (u64)(uintptr_t) NET_DM_SKB_CB(skb)->pc;
+	struct net_dm_skb_cb *cb = NET_DM_SKB_CB(skb);
 	char buf[NET_DM_MAX_SYMBOL_LEN];
 	struct nlattr *attr;
 	void *hdr;
@@ -624,10 +636,15 @@ static int net_dm_packet_report_fill(struct sk_buff *msg, struct sk_buff *skb,
 	if (nla_put_u16(msg, NET_DM_ATTR_ORIGIN, NET_DM_ORIGIN_SW))
 		goto nla_put_failure;
 
-	if (nla_put_u64_64bit(msg, NET_DM_ATTR_PC, pc, NET_DM_ATTR_PAD))
+	if (nla_put_u64_64bit(msg, NET_DM_ATTR_PC, (u64)(uintptr_t)cb->pc,
+			      NET_DM_ATTR_PAD))
 		goto nla_put_failure;
 
-	snprintf(buf, sizeof(buf), "%pS", NET_DM_SKB_CB(skb)->pc);
+	if (nla_put_string(msg, NET_DM_ATTR_REASON,
+			   drop_reasons[cb->reason]))
+		goto nla_put_failure;
+
+	snprintf(buf, sizeof(buf), "%pS", cb->pc);
 	if (nla_put_string(msg, NET_DM_ATTR_SYMBOL, buf))
 		goto nla_put_failure;
 
@@ -683,7 +700,9 @@ static void net_dm_packet_report(struct sk_buff *skb)
 	if (net_dm_trunc_len)
 		payload_len = min_t(size_t, net_dm_trunc_len, payload_len);
 
-	msg = nlmsg_new(net_dm_packet_report_size(payload_len), GFP_KERNEL);
+	msg = nlmsg_new(net_dm_packet_report_size(payload_len,
+						  NET_DM_SKB_CB(skb)->reason),
+			GFP_KERNEL);
 	if (!msg)
 		goto out;
 
@@ -1169,7 +1188,6 @@ err_module_put:
 
 static void net_dm_trace_off_set(void)
 {
-	struct dm_hw_stat_delta *new_stat, *temp;
 	const struct net_dm_alert_ops *ops;
 	int cpu;
 
@@ -1193,13 +1211,6 @@ static void net_dm_trace_off_set(void)
 			consume_skb(skb);
 	}
 
-	list_for_each_entry_safe(new_stat, temp, &hw_stats_list, list) {
-		if (new_stat->dev == NULL) {
-			list_del_rcu(&new_stat->list);
-			kfree_rcu(new_stat, rcu);
-		}
-	}
-
 	module_put(THIS_MODULE);
 }
 
@@ -1560,41 +1571,28 @@ static int dropmon_net_event(struct notifier_block *ev_block,
 			     unsigned long event, void *ptr)
 {
 	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
-	struct dm_hw_stat_delta *new_stat = NULL;
-	struct dm_hw_stat_delta *tmp;
+	struct dm_hw_stat_delta *stat;
 
 	switch (event) {
 	case NETDEV_REGISTER:
-		new_stat = kzalloc(sizeof(struct dm_hw_stat_delta), GFP_KERNEL);
+		if (WARN_ON_ONCE(rtnl_dereference(dev->dm_private)))
+			break;
+		stat = kzalloc(sizeof(*stat), GFP_KERNEL);
+		if (!stat)
+			break;
 
-		if (!new_stat)
-			goto out;
+		stat->last_rx = jiffies;
+		rcu_assign_pointer(dev->dm_private, stat);
 
-		new_stat->dev = dev;
-		new_stat->last_rx = jiffies;
-		mutex_lock(&net_dm_mutex);
-		list_add_rcu(&new_stat->list, &hw_stats_list);
-		mutex_unlock(&net_dm_mutex);
 		break;
 	case NETDEV_UNREGISTER:
-		mutex_lock(&net_dm_mutex);
-		list_for_each_entry_safe(new_stat, tmp, &hw_stats_list, list) {
-			if (new_stat->dev == dev) {
-
-				/* Paired with READ_ONCE() in trace_napi_poll_hit() */
-				WRITE_ONCE(new_stat->dev, NULL);
-
-				if (trace_state == TRACE_OFF) {
-					list_del_rcu(&new_stat->list);
-					kfree_rcu(new_stat, rcu);
-					break;
-				}
-			}
+		stat = rtnl_dereference(dev->dm_private);
+		if (stat) {
+			rcu_assign_pointer(dev->dm_private, NULL);
+			kfree_rcu(stat, rcu);
 		}
-		mutex_unlock(&net_dm_mutex);
 		break;
 	}
-out:
 	return NOTIFY_DONE;
 }
 
diff --git a/net/core/filter.c b/net/core/filter.c
index 9eb785842258..a7044e98765e 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -2107,7 +2107,7 @@ static inline int __bpf_tx_skb(struct net_device *dev, struct sk_buff *skb)
 	}
 
 	skb->dev = dev;
-	skb->tstamp = 0;
+	skb_clear_tstamp(skb);
 
 	dev_xmit_recursion_inc();
 	ret = dev_queue_xmit(skb);
@@ -2176,7 +2176,7 @@ static int bpf_out_neigh_v6(struct net *net, struct sk_buff *skb,
 	}
 
 	skb->dev = dev;
-	skb->tstamp = 0;
+	skb_clear_tstamp(skb);
 
 	if (unlikely(skb_headroom(skb) < hh_len && dev->header_ops)) {
 		skb = skb_expand_head(skb, hh_len);
@@ -2274,7 +2274,7 @@ static int bpf_out_neigh_v4(struct net *net, struct sk_buff *skb,
 	}
 
 	skb->dev = dev;
-	skb->tstamp = 0;
+	skb_clear_tstamp(skb);
 
 	if (unlikely(skb_headroom(skb) < hh_len && dev->header_ops)) {
 		skb = skb_expand_head(skb, hh_len);
@@ -2603,7 +2603,7 @@ BPF_CALL_4(bpf_msg_pull_data, struct sk_msg *, msg, u32, start,
 	 * account for the headroom.
 	 */
 	bytes_sg_total = start - offset + bytes;
-	if (!test_bit(i, &msg->sg.copy) && bytes_sg_total <= len)
+	if (!test_bit(i, msg->sg.copy) && bytes_sg_total <= len)
 		goto out;
 
 	/* At this point we need to linearize multiple scatterlist
@@ -2812,7 +2812,7 @@ BPF_CALL_4(bpf_msg_push_data, struct sk_msg *, msg, u32, start,
 	/* Place newly allocated data buffer */
 	sk_mem_charge(msg->sk, len);
 	msg->sg.size += len;
-	__clear_bit(new, &msg->sg.copy);
+	__clear_bit(new, msg->sg.copy);
 	sg_set_page(&msg->sg.data[new], page, len + copy, 0);
 	if (rsge.length) {
 		get_page(sg_page(&rsge));
@@ -3786,6 +3786,28 @@ static const struct bpf_func_proto sk_skb_change_head_proto = {
 	.arg2_type	= ARG_ANYTHING,
 	.arg3_type	= ARG_ANYTHING,
 };
+
+BPF_CALL_1(bpf_xdp_get_buff_len, struct  xdp_buff*, xdp)
+{
+	return xdp_get_buff_len(xdp);
+}
+
+static const struct bpf_func_proto bpf_xdp_get_buff_len_proto = {
+	.func		= bpf_xdp_get_buff_len,
+	.gpl_only	= false,
+	.ret_type	= RET_INTEGER,
+	.arg1_type	= ARG_PTR_TO_CTX,
+};
+
+BTF_ID_LIST_SINGLE(bpf_xdp_get_buff_len_bpf_ids, struct, xdp_buff)
+
+const struct bpf_func_proto bpf_xdp_get_buff_len_trace_proto = {
+	.func		= bpf_xdp_get_buff_len,
+	.gpl_only	= false,
+	.arg1_type	= ARG_PTR_TO_BTF_ID,
+	.arg1_btf_id	= &bpf_xdp_get_buff_len_bpf_ids[0],
+};
+
 static unsigned long xdp_get_metalen(const struct xdp_buff *xdp)
 {
 	return xdp_data_meta_unsupported(xdp) ? 0 :
@@ -3820,11 +3842,208 @@ static const struct bpf_func_proto bpf_xdp_adjust_head_proto = {
 	.arg2_type	= ARG_ANYTHING,
 };
 
+static void bpf_xdp_copy_buf(struct xdp_buff *xdp, unsigned long off,
+			     void *buf, unsigned long len, bool flush)
+{
+	unsigned long ptr_len, ptr_off = 0;
+	skb_frag_t *next_frag, *end_frag;
+	struct skb_shared_info *sinfo;
+	void *src, *dst;
+	u8 *ptr_buf;
+
+	if (likely(xdp->data_end - xdp->data >= off + len)) {
+		src = flush ? buf : xdp->data + off;
+		dst = flush ? xdp->data + off : buf;
+		memcpy(dst, src, len);
+		return;
+	}
+
+	sinfo = xdp_get_shared_info_from_buff(xdp);
+	end_frag = &sinfo->frags[sinfo->nr_frags];
+	next_frag = &sinfo->frags[0];
+
+	ptr_len = xdp->data_end - xdp->data;
+	ptr_buf = xdp->data;
+
+	while (true) {
+		if (off < ptr_off + ptr_len) {
+			unsigned long copy_off = off - ptr_off;
+			unsigned long copy_len = min(len, ptr_len - copy_off);
+
+			src = flush ? buf : ptr_buf + copy_off;
+			dst = flush ? ptr_buf + copy_off : buf;
+			memcpy(dst, src, copy_len);
+
+			off += copy_len;
+			len -= copy_len;
+			buf += copy_len;
+		}
+
+		if (!len || next_frag == end_frag)
+			break;
+
+		ptr_off += ptr_len;
+		ptr_buf = skb_frag_address(next_frag);
+		ptr_len = skb_frag_size(next_frag);
+		next_frag++;
+	}
+}
+
+static void *bpf_xdp_pointer(struct xdp_buff *xdp, u32 offset, u32 len)
+{
+	struct skb_shared_info *sinfo = xdp_get_shared_info_from_buff(xdp);
+	u32 size = xdp->data_end - xdp->data;
+	void *addr = xdp->data;
+	int i;
+
+	if (unlikely(offset > 0xffff || len > 0xffff))
+		return ERR_PTR(-EFAULT);
+
+	if (offset + len > xdp_get_buff_len(xdp))
+		return ERR_PTR(-EINVAL);
+
+	if (offset < size) /* linear area */
+		goto out;
+
+	offset -= size;
+	for (i = 0; i < sinfo->nr_frags; i++) { /* paged area */
+		u32 frag_size = skb_frag_size(&sinfo->frags[i]);
+
+		if  (offset < frag_size) {
+			addr = skb_frag_address(&sinfo->frags[i]);
+			size = frag_size;
+			break;
+		}
+		offset -= frag_size;
+	}
+out:
+	return offset + len < size ? addr + offset : NULL;
+}
+
+BPF_CALL_4(bpf_xdp_load_bytes, struct xdp_buff *, xdp, u32, offset,
+	   void *, buf, u32, len)
+{
+	void *ptr;
+
+	ptr = bpf_xdp_pointer(xdp, offset, len);
+	if (IS_ERR(ptr))
+		return PTR_ERR(ptr);
+
+	if (!ptr)
+		bpf_xdp_copy_buf(xdp, offset, buf, len, false);
+	else
+		memcpy(buf, ptr, len);
+
+	return 0;
+}
+
+static const struct bpf_func_proto bpf_xdp_load_bytes_proto = {
+	.func		= bpf_xdp_load_bytes,
+	.gpl_only	= false,
+	.ret_type	= RET_INTEGER,
+	.arg1_type	= ARG_PTR_TO_CTX,
+	.arg2_type	= ARG_ANYTHING,
+	.arg3_type	= ARG_PTR_TO_UNINIT_MEM,
+	.arg4_type	= ARG_CONST_SIZE,
+};
+
+BPF_CALL_4(bpf_xdp_store_bytes, struct xdp_buff *, xdp, u32, offset,
+	   void *, buf, u32, len)
+{
+	void *ptr;
+
+	ptr = bpf_xdp_pointer(xdp, offset, len);
+	if (IS_ERR(ptr))
+		return PTR_ERR(ptr);
+
+	if (!ptr)
+		bpf_xdp_copy_buf(xdp, offset, buf, len, true);
+	else
+		memcpy(ptr, buf, len);
+
+	return 0;
+}
+
+static const struct bpf_func_proto bpf_xdp_store_bytes_proto = {
+	.func		= bpf_xdp_store_bytes,
+	.gpl_only	= false,
+	.ret_type	= RET_INTEGER,
+	.arg1_type	= ARG_PTR_TO_CTX,
+	.arg2_type	= ARG_ANYTHING,
+	.arg3_type	= ARG_PTR_TO_UNINIT_MEM,
+	.arg4_type	= ARG_CONST_SIZE,
+};
+
+static int bpf_xdp_frags_increase_tail(struct xdp_buff *xdp, int offset)
+{
+	struct skb_shared_info *sinfo = xdp_get_shared_info_from_buff(xdp);
+	skb_frag_t *frag = &sinfo->frags[sinfo->nr_frags - 1];
+	struct xdp_rxq_info *rxq = xdp->rxq;
+	unsigned int tailroom;
+
+	if (!rxq->frag_size || rxq->frag_size > xdp->frame_sz)
+		return -EOPNOTSUPP;
+
+	tailroom = rxq->frag_size - skb_frag_size(frag) - skb_frag_off(frag);
+	if (unlikely(offset > tailroom))
+		return -EINVAL;
+
+	memset(skb_frag_address(frag) + skb_frag_size(frag), 0, offset);
+	skb_frag_size_add(frag, offset);
+	sinfo->xdp_frags_size += offset;
+
+	return 0;
+}
+
+static int bpf_xdp_frags_shrink_tail(struct xdp_buff *xdp, int offset)
+{
+	struct skb_shared_info *sinfo = xdp_get_shared_info_from_buff(xdp);
+	int i, n_frags_free = 0, len_free = 0;
+
+	if (unlikely(offset > (int)xdp_get_buff_len(xdp) - ETH_HLEN))
+		return -EINVAL;
+
+	for (i = sinfo->nr_frags - 1; i >= 0 && offset > 0; i--) {
+		skb_frag_t *frag = &sinfo->frags[i];
+		int shrink = min_t(int, offset, skb_frag_size(frag));
+
+		len_free += shrink;
+		offset -= shrink;
+
+		if (skb_frag_size(frag) == shrink) {
+			struct page *page = skb_frag_page(frag);
+
+			__xdp_return(page_address(page), &xdp->rxq->mem,
+				     false, NULL);
+			n_frags_free++;
+		} else {
+			skb_frag_size_sub(frag, shrink);
+			break;
+		}
+	}
+	sinfo->nr_frags -= n_frags_free;
+	sinfo->xdp_frags_size -= len_free;
+
+	if (unlikely(!sinfo->nr_frags)) {
+		xdp_buff_clear_frags_flag(xdp);
+		xdp->data_end -= offset;
+	}
+
+	return 0;
+}
+
 BPF_CALL_2(bpf_xdp_adjust_tail, struct xdp_buff *, xdp, int, offset)
 {
 	void *data_hard_end = xdp_data_hard_end(xdp); /* use xdp->frame_sz */
 	void *data_end = xdp->data_end + offset;
 
+	if (unlikely(xdp_buff_has_frags(xdp))) { /* non-linear xdp buff */
+		if (offset < 0)
+			return bpf_xdp_frags_shrink_tail(xdp, -offset);
+
+		return bpf_xdp_frags_increase_tail(xdp, offset);
+	}
+
 	/* Notice that xdp_data_hard_end have reserved some tailroom */
 	if (unlikely(data_end > data_hard_end))
 		return -EINVAL;
@@ -4050,6 +4269,14 @@ int xdp_do_redirect(struct net_device *dev, struct xdp_buff *xdp,
 	struct bpf_redirect_info *ri = this_cpu_ptr(&bpf_redirect_info);
 	enum bpf_map_type map_type = ri->map_type;
 
+	/* XDP_REDIRECT is not fully supported yet for xdp frags since
+	 * not all XDP capable drivers can map non-linear xdp_frame in
+	 * ndo_xdp_xmit.
+	 */
+	if (unlikely(xdp_buff_has_frags(xdp) &&
+		     map_type != BPF_MAP_TYPE_CPUMAP))
+		return -EOPNOTSUPP;
+
 	if (map_type == BPF_MAP_TYPE_XSKMAP)
 		return __xdp_do_redirect_xsk(ri, dev, xdp, xdp_prog);
 
@@ -4593,10 +4820,12 @@ static const struct bpf_func_proto bpf_sk_ancestor_cgroup_id_proto = {
 };
 #endif
 
-static unsigned long bpf_xdp_copy(void *dst_buff, const void *src_buff,
+static unsigned long bpf_xdp_copy(void *dst, const void *ctx,
 				  unsigned long off, unsigned long len)
 {
-	memcpy(dst_buff, src_buff + off, len);
+	struct xdp_buff *xdp = (struct xdp_buff *)ctx;
+
+	bpf_xdp_copy_buf(xdp, off, dst, len, false);
 	return 0;
 }
 
@@ -4607,11 +4836,11 @@ BPF_CALL_5(bpf_xdp_event_output, struct xdp_buff *, xdp, struct bpf_map *, map,
 
 	if (unlikely(flags & ~(BPF_F_CTXLEN_MASK | BPF_F_INDEX_MASK)))
 		return -EINVAL;
-	if (unlikely(!xdp ||
-		     xdp_size > (unsigned long)(xdp->data_end - xdp->data)))
+
+	if (unlikely(!xdp || xdp_size > xdp_get_buff_len(xdp)))
 		return -EFAULT;
 
-	return bpf_event_output(map, flags, meta, meta_size, xdp->data,
+	return bpf_event_output(map, flags, meta, meta_size, xdp,
 				xdp_size, bpf_xdp_copy);
 }
 
@@ -4865,6 +5094,13 @@ static int _bpf_setsockopt(struct sock *sk, int level, int optname,
 		case SO_REUSEPORT:
 			sk->sk_reuseport = valbool;
 			break;
+		case SO_TXREHASH:
+			if (val < -1 || val > 1) {
+				ret = -EINVAL;
+				break;
+			}
+			sk->sk_txrehash = (u8)val;
+			break;
 		default:
 			ret = -EINVAL;
 		}
@@ -5043,6 +5279,9 @@ static int _bpf_getsockopt(struct sock *sk, int level, int optname,
 		case SO_REUSEPORT:
 			*((int *)optval) = sk->sk_reuseport;
 			break;
+		case SO_TXREHASH:
+			*((int *)optval) = sk->sk_txrehash;
+			break;
 		default:
 			goto err_clear;
 		}
@@ -7149,6 +7388,43 @@ static const struct bpf_func_proto bpf_sock_ops_reserve_hdr_opt_proto = {
 	.arg3_type	= ARG_ANYTHING,
 };
 
+BPF_CALL_3(bpf_skb_set_tstamp, struct sk_buff *, skb,
+	   u64, tstamp, u32, tstamp_type)
+{
+	/* skb_clear_delivery_time() is done for inet protocol */
+	if (skb->protocol != htons(ETH_P_IP) &&
+	    skb->protocol != htons(ETH_P_IPV6))
+		return -EOPNOTSUPP;
+
+	switch (tstamp_type) {
+	case BPF_SKB_TSTAMP_DELIVERY_MONO:
+		if (!tstamp)
+			return -EINVAL;
+		skb->tstamp = tstamp;
+		skb->mono_delivery_time = 1;
+		break;
+	case BPF_SKB_TSTAMP_UNSPEC:
+		if (tstamp)
+			return -EINVAL;
+		skb->tstamp = 0;
+		skb->mono_delivery_time = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static const struct bpf_func_proto bpf_skb_set_tstamp_proto = {
+	.func           = bpf_skb_set_tstamp,
+	.gpl_only       = false,
+	.ret_type       = RET_INTEGER,
+	.arg1_type      = ARG_PTR_TO_CTX,
+	.arg2_type      = ARG_ANYTHING,
+	.arg3_type      = ARG_ANYTHING,
+};
+
 #endif /* CONFIG_INET */
 
 bool bpf_helper_changes_pkt_data(void *func)
@@ -7510,6 +7786,8 @@ tc_cls_act_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
 		return &bpf_tcp_gen_syncookie_proto;
 	case BPF_FUNC_sk_assign:
 		return &bpf_sk_assign_proto;
+	case BPF_FUNC_skb_set_tstamp:
+		return &bpf_skb_set_tstamp_proto;
 #endif
 	default:
 		return bpf_sk_base_func_proto(func_id);
@@ -7536,6 +7814,12 @@ xdp_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
 		return &bpf_xdp_redirect_map_proto;
 	case BPF_FUNC_xdp_adjust_tail:
 		return &bpf_xdp_adjust_tail_proto;
+	case BPF_FUNC_xdp_get_buff_len:
+		return &bpf_xdp_get_buff_len_proto;
+	case BPF_FUNC_xdp_load_bytes:
+		return &bpf_xdp_load_bytes_proto;
+	case BPF_FUNC_xdp_store_bytes:
+		return &bpf_xdp_store_bytes_proto;
 	case BPF_FUNC_fib_lookup:
 		return &bpf_xdp_fib_lookup_proto;
 	case BPF_FUNC_check_mtu:
@@ -7843,7 +8127,9 @@ static bool bpf_skb_is_valid_access(int off, int size, enum bpf_access_type type
 			return false;
 		info->reg_type = PTR_TO_SOCK_COMMON_OR_NULL;
 		break;
-	case offsetofend(struct __sk_buff, gso_size) ... offsetof(struct __sk_buff, hwtstamp) - 1:
+	case offsetof(struct __sk_buff, tstamp_type):
+		return false;
+	case offsetofend(struct __sk_buff, tstamp_type) ... offsetof(struct __sk_buff, hwtstamp) - 1:
 		/* Explicitly prohibit access to padding in __sk_buff. */
 		return false;
 	default:
@@ -8033,6 +8319,7 @@ bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
 			      struct bpf_insn_access_aux *info)
 {
 	const int size_default = sizeof(__u32);
+	int field_size;
 
 	if (off < 0 || off >= sizeof(struct bpf_sock))
 		return false;
@@ -8044,7 +8331,6 @@ bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
 	case offsetof(struct bpf_sock, family):
 	case offsetof(struct bpf_sock, type):
 	case offsetof(struct bpf_sock, protocol):
-	case offsetof(struct bpf_sock, dst_port):
 	case offsetof(struct bpf_sock, src_port):
 	case offsetof(struct bpf_sock, rx_queue_mapping):
 	case bpf_ctx_range(struct bpf_sock, src_ip4):
@@ -8053,6 +8339,14 @@ bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
 	case bpf_ctx_range_till(struct bpf_sock, dst_ip6[0], dst_ip6[3]):
 		bpf_ctx_record_field_size(info, size_default);
 		return bpf_ctx_narrow_access_ok(off, size, size_default);
+	case bpf_ctx_range(struct bpf_sock, dst_port):
+		field_size = size == size_default ?
+			size_default : sizeof_field(struct bpf_sock, dst_port);
+		bpf_ctx_record_field_size(info, field_size);
+		return bpf_ctx_narrow_access_ok(off, size, field_size);
+	case offsetofend(struct bpf_sock, dst_port) ...
+	     offsetof(struct bpf_sock, dst_ip4) - 1:
+		return false;
 	}
 
 	return size == size_default;
@@ -8190,6 +8484,15 @@ static bool tc_cls_act_is_valid_access(int off, int size,
 		break;
 	case bpf_ctx_range_till(struct __sk_buff, family, local_port):
 		return false;
+	case offsetof(struct __sk_buff, tstamp_type):
+		/* The convert_ctx_access() on reading and writing
+		 * __sk_buff->tstamp depends on whether the bpf prog
+		 * has used __sk_buff->tstamp_type or not.
+		 * Thus, we need to set prog->tstamp_type_access
+		 * earlier during is_valid_access() here.
+		 */
+		((struct bpf_prog *)prog)->tstamp_type_access = 1;
+		return size == sizeof(__u8);
 	}
 
 	return bpf_skb_is_valid_access(off, size, type, prog, info);
@@ -8585,6 +8888,25 @@ static u32 flow_dissector_convert_ctx_access(enum bpf_access_type type,
 	return insn - insn_buf;
 }
 
+static struct bpf_insn *bpf_convert_tstamp_type_read(const struct bpf_insn *si,
+						     struct bpf_insn *insn)
+{
+	__u8 value_reg = si->dst_reg;
+	__u8 skb_reg = si->src_reg;
+	/* AX is needed because src_reg and dst_reg could be the same */
+	__u8 tmp_reg = BPF_REG_AX;
+
+	*insn++ = BPF_LDX_MEM(BPF_B, tmp_reg, skb_reg,
+			      PKT_VLAN_PRESENT_OFFSET);
+	*insn++ = BPF_JMP32_IMM(BPF_JSET, tmp_reg,
+				SKB_MONO_DELIVERY_TIME_MASK, 2);
+	*insn++ = BPF_MOV32_IMM(value_reg, BPF_SKB_TSTAMP_UNSPEC);
+	*insn++ = BPF_JMP_A(1);
+	*insn++ = BPF_MOV32_IMM(value_reg, BPF_SKB_TSTAMP_DELIVERY_MONO);
+
+	return insn;
+}
+
 static struct bpf_insn *bpf_convert_shinfo_access(const struct bpf_insn *si,
 						  struct bpf_insn *insn)
 {
@@ -8606,6 +8928,74 @@ static struct bpf_insn *bpf_convert_shinfo_access(const struct bpf_insn *si,
 	return insn;
 }
 
+static struct bpf_insn *bpf_convert_tstamp_read(const struct bpf_prog *prog,
+						const struct bpf_insn *si,
+						struct bpf_insn *insn)
+{
+	__u8 value_reg = si->dst_reg;
+	__u8 skb_reg = si->src_reg;
+
+#ifdef CONFIG_NET_CLS_ACT
+	/* If the tstamp_type is read,
+	 * the bpf prog is aware the tstamp could have delivery time.
+	 * Thus, read skb->tstamp as is if tstamp_type_access is true.
+	 */
+	if (!prog->tstamp_type_access) {
+		/* AX is needed because src_reg and dst_reg could be the same */
+		__u8 tmp_reg = BPF_REG_AX;
+
+		*insn++ = BPF_LDX_MEM(BPF_B, tmp_reg, skb_reg, PKT_VLAN_PRESENT_OFFSET);
+		*insn++ = BPF_ALU32_IMM(BPF_AND, tmp_reg,
+					TC_AT_INGRESS_MASK | SKB_MONO_DELIVERY_TIME_MASK);
+		*insn++ = BPF_JMP32_IMM(BPF_JNE, tmp_reg,
+					TC_AT_INGRESS_MASK | SKB_MONO_DELIVERY_TIME_MASK, 2);
+		/* skb->tc_at_ingress && skb->mono_delivery_time,
+		 * read 0 as the (rcv) timestamp.
+		 */
+		*insn++ = BPF_MOV64_IMM(value_reg, 0);
+		*insn++ = BPF_JMP_A(1);
+	}
+#endif
+
+	*insn++ = BPF_LDX_MEM(BPF_DW, value_reg, skb_reg,
+			      offsetof(struct sk_buff, tstamp));
+	return insn;
+}
+
+static struct bpf_insn *bpf_convert_tstamp_write(const struct bpf_prog *prog,
+						 const struct bpf_insn *si,
+						 struct bpf_insn *insn)
+{
+	__u8 value_reg = si->src_reg;
+	__u8 skb_reg = si->dst_reg;
+
+#ifdef CONFIG_NET_CLS_ACT
+	/* If the tstamp_type is read,
+	 * the bpf prog is aware the tstamp could have delivery time.
+	 * Thus, write skb->tstamp as is if tstamp_type_access is true.
+	 * Otherwise, writing at ingress will have to clear the
+	 * mono_delivery_time bit also.
+	 */
+	if (!prog->tstamp_type_access) {
+		__u8 tmp_reg = BPF_REG_AX;
+
+		*insn++ = BPF_LDX_MEM(BPF_B, tmp_reg, skb_reg, PKT_VLAN_PRESENT_OFFSET);
+		/* Writing __sk_buff->tstamp as ingress, goto <clear> */
+		*insn++ = BPF_JMP32_IMM(BPF_JSET, tmp_reg, TC_AT_INGRESS_MASK, 1);
+		/* goto <store> */
+		*insn++ = BPF_JMP_A(2);
+		/* <clear>: mono_delivery_time */
+		*insn++ = BPF_ALU32_IMM(BPF_AND, tmp_reg, ~SKB_MONO_DELIVERY_TIME_MASK);
+		*insn++ = BPF_STX_MEM(BPF_B, skb_reg, tmp_reg, PKT_VLAN_PRESENT_OFFSET);
+	}
+#endif
+
+	/* <store>: skb->tstamp = tstamp */
+	*insn++ = BPF_STX_MEM(BPF_DW, skb_reg, value_reg,
+			      offsetof(struct sk_buff, tstamp));
+	return insn;
+}
+
 static u32 bpf_convert_ctx_access(enum bpf_access_type type,
 				  const struct bpf_insn *si,
 				  struct bpf_insn *insn_buf,
@@ -8914,17 +9304,13 @@ static u32 bpf_convert_ctx_access(enum bpf_access_type type,
 		BUILD_BUG_ON(sizeof_field(struct sk_buff, tstamp) != 8);
 
 		if (type == BPF_WRITE)
-			*insn++ = BPF_STX_MEM(BPF_DW,
-					      si->dst_reg, si->src_reg,
-					      bpf_target_off(struct sk_buff,
-							     tstamp, 8,
-							     target_size));
+			insn = bpf_convert_tstamp_write(prog, si, insn);
 		else
-			*insn++ = BPF_LDX_MEM(BPF_DW,
-					      si->dst_reg, si->src_reg,
-					      bpf_target_off(struct sk_buff,
-							     tstamp, 8,
-							     target_size));
+			insn = bpf_convert_tstamp_read(prog, si, insn);
+		break;
+
+	case offsetof(struct __sk_buff, tstamp_type):
+		insn = bpf_convert_tstamp_type_read(si, insn);
 		break;
 
 	case offsetof(struct __sk_buff, gso_segs):
@@ -10065,7 +10451,6 @@ const struct bpf_verifier_ops tc_cls_act_verifier_ops = {
 	.convert_ctx_access	= tc_cls_act_convert_ctx_access,
 	.gen_prologue		= tc_cls_act_prologue,
 	.gen_ld_abs		= bpf_gen_ld_abs,
-	.check_kfunc_call	= bpf_prog_test_check_kfunc_call,
 };
 
 const struct bpf_prog_ops tc_cls_act_prog_ops = {
@@ -10604,12 +10989,24 @@ static bool sk_lookup_is_valid_access(int off, int size,
 	case bpf_ctx_range(struct bpf_sk_lookup, local_ip4):
 	case bpf_ctx_range_till(struct bpf_sk_lookup, remote_ip6[0], remote_ip6[3]):
 	case bpf_ctx_range_till(struct bpf_sk_lookup, local_ip6[0], local_ip6[3]):
-	case bpf_ctx_range(struct bpf_sk_lookup, remote_port):
 	case bpf_ctx_range(struct bpf_sk_lookup, local_port):
 	case bpf_ctx_range(struct bpf_sk_lookup, ingress_ifindex):
 		bpf_ctx_record_field_size(info, sizeof(__u32));
 		return bpf_ctx_narrow_access_ok(off, size, sizeof(__u32));
 
+	case bpf_ctx_range(struct bpf_sk_lookup, remote_port):
+		/* Allow 4-byte access to 2-byte field for backward compatibility */
+		if (size == sizeof(__u32))
+			return true;
+		bpf_ctx_record_field_size(info, sizeof(__be16));
+		return bpf_ctx_narrow_access_ok(off, size, sizeof(__be16));
+
+	case offsetofend(struct bpf_sk_lookup, remote_port) ...
+	     offsetof(struct bpf_sk_lookup, local_ip4) - 1:
+		/* Allow access to zero padding for backward compatibility */
+		bpf_ctx_record_field_size(info, sizeof(__u16));
+		return bpf_ctx_narrow_access_ok(off, size, sizeof(__u16));
+
 	default:
 		return false;
 	}
@@ -10691,6 +11088,11 @@ static u32 sk_lookup_convert_ctx_access(enum bpf_access_type type,
 						     sport, 2, target_size));
 		break;
 
+	case offsetofend(struct bpf_sk_lookup, remote_port):
+		*target_size = 2;
+		*insn++ = BPF_MOV32_IMM(si->dst_reg, 0);
+		break;
+
 	case offsetof(struct bpf_sk_lookup, local_port):
 		*insn++ = BPF_LDX_MEM(BPF_H, si->dst_reg, si->src_reg,
 				      bpf_target_off(struct bpf_sk_lookup_kern,
diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c
index 15833e1d6ea1..03b6e649c428 100644
--- a/net/core/flow_dissector.c
+++ b/net/core/flow_dissector.c
@@ -22,6 +22,7 @@
 #include <linux/ppp_defs.h>
 #include <linux/stddef.h>
 #include <linux/if_ether.h>
+#include <linux/if_hsr.h>
 #include <linux/mpls.h>
 #include <linux/tcp.h>
 #include <linux/ptp_classify.h>
@@ -1282,6 +1283,23 @@ proto_again:
 		break;
 	}
 
+	case htons(ETH_P_PRP):
+	case htons(ETH_P_HSR): {
+		struct hsr_tag *hdr, _hdr;
+
+		hdr = __skb_header_pointer(skb, nhoff, sizeof(_hdr), data, hlen,
+					   &_hdr);
+		if (!hdr) {
+			fdret = FLOW_DISSECT_RET_OUT_BAD;
+			break;
+		}
+
+		proto = hdr->encap_proto;
+		nhoff += HSR_HLEN;
+		fdret = FLOW_DISSECT_RET_PROTO_AGAIN;
+		break;
+	}
+
 	default:
 		fdret = FLOW_DISSECT_RET_OUT_BAD;
 		break;
diff --git a/net/core/gro.c b/net/core/gro.c
index b7d2b0dc59a2..78110edf5d4b 100644
--- a/net/core/gro.c
+++ b/net/core/gro.c
@@ -484,29 +484,22 @@ static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff
 
 		skb_set_network_header(skb, skb_gro_offset(skb));
 		skb_reset_mac_len(skb);
-		NAPI_GRO_CB(skb)->same_flow = 0;
+		BUILD_BUG_ON(sizeof_field(struct napi_gro_cb, zeroed) != sizeof(u32));
+		BUILD_BUG_ON(!IS_ALIGNED(offsetof(struct napi_gro_cb, zeroed),
+					 sizeof(u32))); /* Avoid slow unaligned acc */
+		*(u32 *)&NAPI_GRO_CB(skb)->zeroed = 0;
 		NAPI_GRO_CB(skb)->flush = skb_is_gso(skb) || skb_has_frag_list(skb);
-		NAPI_GRO_CB(skb)->free = 0;
-		NAPI_GRO_CB(skb)->encap_mark = 0;
-		NAPI_GRO_CB(skb)->recursion_counter = 0;
-		NAPI_GRO_CB(skb)->is_fou = 0;
 		NAPI_GRO_CB(skb)->is_atomic = 1;
-		NAPI_GRO_CB(skb)->gro_remcsum_start = 0;
 
 		/* Setup for GRO checksum validation */
 		switch (skb->ip_summed) {
 		case CHECKSUM_COMPLETE:
 			NAPI_GRO_CB(skb)->csum = skb->csum;
 			NAPI_GRO_CB(skb)->csum_valid = 1;
-			NAPI_GRO_CB(skb)->csum_cnt = 0;
 			break;
 		case CHECKSUM_UNNECESSARY:
 			NAPI_GRO_CB(skb)->csum_cnt = skb->csum_level + 1;
-			NAPI_GRO_CB(skb)->csum_valid = 0;
 			break;
-		default:
-			NAPI_GRO_CB(skb)->csum_cnt = 0;
-			NAPI_GRO_CB(skb)->csum_valid = 0;
 		}
 
 		pp = INDIRECT_CALL_INET(ptype->callbacks.gro_receive,
@@ -659,7 +652,6 @@ static void napi_reuse_skb(struct napi_struct *napi, struct sk_buff *skb)
 
 	skb->encapsulation = 0;
 	skb_shinfo(skb)->gso_type = 0;
-	skb->truesize = SKB_TRUESIZE(skb_end_offset(skb));
 	if (unlikely(skb->slow_gro)) {
 		skb_orphan(skb);
 		skb_ext_reset(skb);
diff --git a/net/core/gro_cells.c b/net/core/gro_cells.c
index 6eb2e5ec2c50..541c7a72a28a 100644
--- a/net/core/gro_cells.c
+++ b/net/core/gro_cells.c
@@ -28,7 +28,7 @@ int gro_cells_receive(struct gro_cells *gcells, struct sk_buff *skb)
 
 	if (skb_queue_len(&cell->napi_skbs) > netdev_max_backlog) {
 drop:
-		atomic_long_inc(&dev->rx_dropped);
+		dev_core_stats_rx_dropped_inc(dev);
 		kfree_skb(skb);
 		res = NET_RX_DROP;
 		goto unlock;
@@ -89,8 +89,23 @@ int gro_cells_init(struct gro_cells *gcells, struct net_device *dev)
 }
 EXPORT_SYMBOL(gro_cells_init);
 
+struct percpu_free_defer {
+	struct rcu_head rcu;
+	void __percpu	*ptr;
+};
+
+static void percpu_free_defer_callback(struct rcu_head *head)
+{
+	struct percpu_free_defer *defer;
+
+	defer = container_of(head, struct percpu_free_defer, rcu);
+	free_percpu(defer->ptr);
+	kfree(defer);
+}
+
 void gro_cells_destroy(struct gro_cells *gcells)
 {
+	struct percpu_free_defer *defer;
 	int i;
 
 	if (!gcells->cells)
@@ -102,12 +117,23 @@ void gro_cells_destroy(struct gro_cells *gcells)
 		__netif_napi_del(&cell->napi);
 		__skb_queue_purge(&cell->napi_skbs);
 	}
-	/* This barrier is needed because netpoll could access dev->napi_list
-	 * under rcu protection.
+	/* We need to observe an rcu grace period before freeing ->cells,
+	 * because netpoll could access dev->napi_list under rcu protection.
+	 * Try hard using call_rcu() instead of synchronize_rcu(),
+	 * because we might be called from cleanup_net(), and we
+	 * definitely do not want to block this critical task.
 	 */
-	synchronize_net();
-
-	free_percpu(gcells->cells);
+	defer = kmalloc(sizeof(*defer), GFP_KERNEL | __GFP_NOWARN);
+	if (likely(defer)) {
+		defer->ptr = gcells->cells;
+		call_rcu(&defer->rcu, percpu_free_defer_callback);
+	} else {
+		/* We do not hold RTNL at this point, synchronize_net()
+		 * would not be able to expedite this sync.
+		 */
+		synchronize_rcu_expedited();
+		free_percpu(gcells->cells);
+	}
 	gcells->cells = NULL;
 }
 EXPORT_SYMBOL(gro_cells_destroy);
diff --git a/net/core/link_watch.c b/net/core/link_watch.c
index b0f5344d1185..95098d1a49bd 100644
--- a/net/core/link_watch.c
+++ b/net/core/link_watch.c
@@ -166,10 +166,10 @@ static void linkwatch_do_dev(struct net_device *dev)
 
 		netdev_state_change(dev);
 	}
-	/* Note: our callers are responsible for
-	 * calling netdev_tracker_free().
+	/* Note: our callers are responsible for calling netdev_tracker_free().
+	 * This is the reason we use __dev_put() instead of dev_put().
 	 */
-	dev_put(dev);
+	__dev_put(dev);
 }
 
 static void __linkwatch_run_queue(int urgent_only)
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index ec0bf737b076..f64ebd050f6c 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -1171,7 +1171,7 @@ int __neigh_event_send(struct neighbour *neigh, struct sk_buff *skb,
 			neigh->updated = jiffies;
 			write_unlock_bh(&neigh->lock);
 
-			kfree_skb(skb);
+			kfree_skb_reason(skb, SKB_DROP_REASON_NEIGH_FAILED);
 			return 1;
 		}
 	} else if (neigh->nud_state & NUD_STALE) {
@@ -1193,7 +1193,7 @@ int __neigh_event_send(struct neighbour *neigh, struct sk_buff *skb,
 				if (!buff)
 					break;
 				neigh->arp_queue_len_bytes -= buff->truesize;
-				kfree_skb(buff);
+				kfree_skb_reason(buff, SKB_DROP_REASON_NEIGH_QUEUEFULL);
 				NEIGH_CACHE_STAT_INC(neigh->tbl, unres_discards);
 			}
 			skb_dst_force(skb);
@@ -1215,7 +1215,7 @@ out_dead:
 	if (neigh->nud_state & NUD_STALE)
 		goto out_unlock_bh;
 	write_unlock_bh(&neigh->lock);
-	kfree_skb(skb);
+	kfree_skb_reason(skb, SKB_DROP_REASON_NEIGH_DEAD);
 	trace_neigh_event_send_dead(neigh, 1);
 	return 1;
 }
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index a5b5bb99c644..0ec2f5906a27 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -44,13 +44,7 @@ EXPORT_SYMBOL_GPL(net_rwsem);
 static struct key_tag init_net_key_domain = { .usage = REFCOUNT_INIT(1) };
 #endif
 
-struct net init_net = {
-	.ns.count	= REFCOUNT_INIT(1),
-	.dev_base_head	= LIST_HEAD_INIT(init_net.dev_base_head),
-#ifdef CONFIG_KEYS
-	.key_domain	= &init_net_key_domain,
-#endif
-};
+struct net init_net;
 EXPORT_SYMBOL(init_net);
 
 static bool init_net_initialized;
@@ -301,6 +295,7 @@ struct net *get_net_ns_by_id(const struct net *net, int id)
 
 	return peer;
 }
+EXPORT_SYMBOL_GPL(get_net_ns_by_id);
 
 /*
  * setup_net runs the initializers for the network namespace object.
@@ -363,6 +358,8 @@ out_undo:
 static int __net_init net_defaults_init_net(struct net *net)
 {
 	net->core.sysctl_somaxconn = SOMAXCONN;
+	net->core.sysctl_txrehash = SOCK_TXREHASH_ENABLED;
+
 	return 0;
 }
 
@@ -1084,7 +1081,7 @@ out:
 	rtnl_set_sk_err(net, RTNLGRP_NSID, err);
 }
 
-static int __init net_ns_init(void)
+void __init net_ns_init(void)
 {
 	struct net_generic *ng;
 
@@ -1105,6 +1102,9 @@ static int __init net_ns_init(void)
 
 	rcu_assign_pointer(init_net.gen, ng);
 
+#ifdef CONFIG_KEYS
+	init_net.key_domain = &init_net_key_domain;
+#endif
 	down_write(&pernet_ops_rwsem);
 	if (setup_net(&init_net, &init_user_ns))
 		panic("Could not setup the initial network namespace");
@@ -1119,12 +1119,8 @@ static int __init net_ns_init(void)
 		      RTNL_FLAG_DOIT_UNLOCKED);
 	rtnl_register(PF_UNSPEC, RTM_GETNSID, rtnl_net_getid, rtnl_net_dumpid,
 		      RTNL_FLAG_DOIT_UNLOCKED);
-
-	return 0;
 }
 
-pure_initcall(net_ns_init);
-
 static void free_exit_list(struct pernet_operations *ops, struct list_head *net_exit_list)
 {
 	ops_pre_exit_list(ops, net_exit_list);
diff --git a/net/core/page_pool.c b/net/core/page_pool.c
index bd62c01a2ec3..1943c0f0307d 100644
--- a/net/core/page_pool.c
+++ b/net/core/page_pool.c
@@ -26,6 +26,45 @@
 
 #define BIAS_MAX	LONG_MAX
 
+#ifdef CONFIG_PAGE_POOL_STATS
+/* alloc_stat_inc is intended to be used in softirq context */
+#define alloc_stat_inc(pool, __stat)	(pool->alloc_stats.__stat++)
+/* recycle_stat_inc is safe to use when preemption is possible. */
+#define recycle_stat_inc(pool, __stat)							\
+	do {										\
+		struct page_pool_recycle_stats __percpu *s = pool->recycle_stats;	\
+		this_cpu_inc(s->__stat);						\
+	} while (0)
+
+bool page_pool_get_stats(struct page_pool *pool,
+			 struct page_pool_stats *stats)
+{
+	int cpu = 0;
+
+	if (!stats)
+		return false;
+
+	memcpy(&stats->alloc_stats, &pool->alloc_stats, sizeof(pool->alloc_stats));
+
+	for_each_possible_cpu(cpu) {
+		const struct page_pool_recycle_stats *pcpu =
+			per_cpu_ptr(pool->recycle_stats, cpu);
+
+		stats->recycle_stats.cached += pcpu->cached;
+		stats->recycle_stats.cache_full += pcpu->cache_full;
+		stats->recycle_stats.ring += pcpu->ring;
+		stats->recycle_stats.ring_full += pcpu->ring_full;
+		stats->recycle_stats.released_refcnt += pcpu->released_refcnt;
+	}
+
+	return true;
+}
+EXPORT_SYMBOL(page_pool_get_stats);
+#else
+#define alloc_stat_inc(pool, __stat)
+#define recycle_stat_inc(pool, __stat)
+#endif
+
 static int page_pool_init(struct page_pool *pool,
 			  const struct page_pool_params *params)
 {
@@ -73,6 +112,12 @@ static int page_pool_init(struct page_pool *pool,
 	    pool->p.flags & PP_FLAG_PAGE_FRAG)
 		return -EINVAL;
 
+#ifdef CONFIG_PAGE_POOL_STATS
+	pool->recycle_stats = alloc_percpu(struct page_pool_recycle_stats);
+	if (!pool->recycle_stats)
+		return -ENOMEM;
+#endif
+
 	if (ptr_ring_init(&pool->ring, ring_qsize, GFP_KERNEL) < 0)
 		return -ENOMEM;
 
@@ -117,8 +162,10 @@ static struct page *page_pool_refill_alloc_cache(struct page_pool *pool)
 	int pref_nid; /* preferred NUMA node */
 
 	/* Quicker fallback, avoid locks when ring is empty */
-	if (__ptr_ring_empty(r))
+	if (__ptr_ring_empty(r)) {
+		alloc_stat_inc(pool, empty);
 		return NULL;
+	}
 
 	/* Softirq guarantee CPU and thus NUMA node is stable. This,
 	 * assumes CPU refilling driver RX-ring will also run RX-NAPI.
@@ -145,14 +192,17 @@ static struct page *page_pool_refill_alloc_cache(struct page_pool *pool)
 			 * This limit stress on page buddy alloactor.
 			 */
 			page_pool_return_page(pool, page);
+			alloc_stat_inc(pool, waive);
 			page = NULL;
 			break;
 		}
 	} while (pool->alloc.count < PP_ALLOC_CACHE_REFILL);
 
 	/* Return last page */
-	if (likely(pool->alloc.count > 0))
+	if (likely(pool->alloc.count > 0)) {
 		page = pool->alloc.cache[--pool->alloc.count];
+		alloc_stat_inc(pool, refill);
+	}
 
 	return page;
 }
@@ -166,6 +216,7 @@ static struct page *__page_pool_get_cached(struct page_pool *pool)
 	if (likely(pool->alloc.count)) {
 		/* Fast-path */
 		page = pool->alloc.cache[--pool->alloc.count];
+		alloc_stat_inc(pool, fast);
 	} else {
 		page = page_pool_refill_alloc_cache(pool);
 	}
@@ -239,6 +290,7 @@ static struct page *__page_pool_alloc_page_order(struct page_pool *pool,
 		return NULL;
 	}
 
+	alloc_stat_inc(pool, slow_high_order);
 	page_pool_set_pp_info(pool, page);
 
 	/* Track how many pages are held 'in-flight' */
@@ -293,10 +345,12 @@ static struct page *__page_pool_alloc_pages_slow(struct page_pool *pool,
 	}
 
 	/* Return last page */
-	if (likely(pool->alloc.count > 0))
+	if (likely(pool->alloc.count > 0)) {
 		page = pool->alloc.cache[--pool->alloc.count];
-	else
+		alloc_stat_inc(pool, slow);
+	} else {
 		page = NULL;
+	}
 
 	/* When page just alloc'ed is should/must have refcnt 1. */
 	return page;
@@ -394,7 +448,12 @@ static bool page_pool_recycle_in_ring(struct page_pool *pool, struct page *page)
 	else
 		ret = ptr_ring_produce_bh(&pool->ring, page);
 
-	return (ret == 0) ? true : false;
+	if (!ret) {
+		recycle_stat_inc(pool, ring);
+		return true;
+	}
+
+	return false;
 }
 
 /* Only allow direct recycling in special circumstances, into the
@@ -405,11 +464,14 @@ static bool page_pool_recycle_in_ring(struct page_pool *pool, struct page *page)
 static bool page_pool_recycle_in_cache(struct page *page,
 				       struct page_pool *pool)
 {
-	if (unlikely(pool->alloc.count == PP_ALLOC_CACHE_SIZE))
+	if (unlikely(pool->alloc.count == PP_ALLOC_CACHE_SIZE)) {
+		recycle_stat_inc(pool, cache_full);
 		return false;
+	}
 
 	/* Caller MUST have verified/know (page_ref_count(page) == 1) */
 	pool->alloc.cache[pool->alloc.count++] = page;
+	recycle_stat_inc(pool, cached);
 	return true;
 }
 
@@ -423,11 +485,6 @@ static __always_inline struct page *
 __page_pool_put_page(struct page_pool *pool, struct page *page,
 		     unsigned int dma_sync_size, bool allow_direct)
 {
-	/* It is not the last user for the page frag case */
-	if (pool->p.flags & PP_FLAG_PAGE_FRAG &&
-	    page_pool_atomic_sub_frag_count_return(page, 1))
-		return NULL;
-
 	/* This allocator is optimized for the XDP mode that uses
 	 * one-frame-per-page, but have fallbacks that act like the
 	 * regular page allocator APIs.
@@ -464,6 +521,7 @@ __page_pool_put_page(struct page_pool *pool, struct page *page,
 	 * doing refcnt based recycle tricks, meaning another process
 	 * will be invoking put_page.
 	 */
+	recycle_stat_inc(pool, released_refcnt);
 	/* Do not replace this with page_pool_return_page() */
 	page_pool_release_page(pool, page);
 	put_page(page);
@@ -471,16 +529,17 @@ __page_pool_put_page(struct page_pool *pool, struct page *page,
 	return NULL;
 }
 
-void page_pool_put_page(struct page_pool *pool, struct page *page,
-			unsigned int dma_sync_size, bool allow_direct)
+void page_pool_put_defragged_page(struct page_pool *pool, struct page *page,
+				  unsigned int dma_sync_size, bool allow_direct)
 {
 	page = __page_pool_put_page(pool, page, dma_sync_size, allow_direct);
 	if (page && !page_pool_recycle_in_ring(pool, page)) {
 		/* Cache full, fallback to free pages */
+		recycle_stat_inc(pool, ring_full);
 		page_pool_return_page(pool, page);
 	}
 }
-EXPORT_SYMBOL(page_pool_put_page);
+EXPORT_SYMBOL(page_pool_put_defragged_page);
 
 /* Caller must not use data area after call, as this function overwrites it */
 void page_pool_put_page_bulk(struct page_pool *pool, void **data,
@@ -491,6 +550,10 @@ void page_pool_put_page_bulk(struct page_pool *pool, void **data,
 	for (i = 0; i < count; i++) {
 		struct page *page = virt_to_head_page(data[i]);
 
+		/* It is not the last user for the page frag case */
+		if (!page_pool_is_last_frag(pool, page))
+			continue;
+
 		page = __page_pool_put_page(pool, page, -1, false);
 		/* Approved for bulk recycling in ptr_ring cache */
 		if (page)
@@ -526,8 +589,7 @@ static struct page *page_pool_drain_frag(struct page_pool *pool,
 	long drain_count = BIAS_MAX - pool->frag_users;
 
 	/* Some user is still using the page frag */
-	if (likely(page_pool_atomic_sub_frag_count_return(page,
-							  drain_count)))
+	if (likely(page_pool_defrag_page(page, drain_count)))
 		return NULL;
 
 	if (page_ref_count(page) == 1 && !page_is_pfmemalloc(page)) {
@@ -548,8 +610,7 @@ static void page_pool_free_frag(struct page_pool *pool)
 
 	pool->frag_page = NULL;
 
-	if (!page ||
-	    page_pool_atomic_sub_frag_count_return(page, drain_count))
+	if (!page || page_pool_defrag_page(page, drain_count))
 		return;
 
 	page_pool_return_page(pool, page);
@@ -588,7 +649,7 @@ frag_reset:
 		pool->frag_users = 1;
 		*offset = 0;
 		pool->frag_offset = size;
-		page_pool_set_frag_count(page, BIAS_MAX);
+		page_pool_fragment_page(page, BIAS_MAX);
 		return page;
 	}
 
@@ -623,6 +684,9 @@ static void page_pool_free(struct page_pool *pool)
 	if (pool->p.flags & PP_FLAG_DMA_MAP)
 		put_device(pool->p.dev);
 
+#ifdef CONFIG_PAGE_POOL_STATS
+	free_percpu(pool->recycle_stats);
+#endif
 	kfree(pool);
 }
 
diff --git a/net/core/ptp_classifier.c b/net/core/ptp_classifier.c
index dd4cf01d1e0a..598041b0499e 100644
--- a/net/core/ptp_classifier.c
+++ b/net/core/ptp_classifier.c
@@ -137,6 +137,18 @@ struct ptp_header *ptp_parse_header(struct sk_buff *skb, unsigned int type)
 }
 EXPORT_SYMBOL_GPL(ptp_parse_header);
 
+bool ptp_msg_is_sync(struct sk_buff *skb, unsigned int type)
+{
+	struct ptp_header *hdr;
+
+	hdr = ptp_parse_header(skb, type);
+	if (!hdr)
+		return false;
+
+	return ptp_get_msgtype(hdr, type) == PTP_MSGTYPE_SYNC;
+}
+EXPORT_SYMBOL_GPL(ptp_msg_is_sync);
+
 void __init ptp_classifier_init(void)
 {
 	static struct sock_filter ptp_filter[] __initdata = {
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 2fb8eb6791e8..159c9c61e6af 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -459,7 +459,7 @@ static void rtnl_lock_unregistering_all(void)
 		 * setup_net() and cleanup_net() are not possible.
 		 */
 		for_each_net(net) {
-			if (net->dev_unreg_count > 0) {
+			if (atomic_read(&net->dev_unreg_count) > 0) {
 				unregistering = true;
 				break;
 			}
@@ -3652,13 +3652,24 @@ static int rtnl_alt_ifname(int cmd, struct net_device *dev, struct nlattr *attr,
 			   bool *changed, struct netlink_ext_ack *extack)
 {
 	char *alt_ifname;
+	size_t size;
 	int err;
 
 	err = nla_validate(attr, attr->nla_len, IFLA_MAX, ifla_policy, extack);
 	if (err)
 		return err;
 
-	alt_ifname = nla_strdup(attr, GFP_KERNEL);
+	if (cmd == RTM_NEWLINKPROP) {
+		size = rtnl_prop_list_size(dev);
+		size += nla_total_size(ALTIFNAMSIZ);
+		if (size >= U16_MAX) {
+			NL_SET_ERR_MSG(extack,
+				       "effective property list too long");
+			return -EINVAL;
+		}
+	}
+
+	alt_ifname = nla_strdup(attr, GFP_KERNEL_ACCOUNT);
 	if (!alt_ifname)
 		return -ENOMEM;
 
@@ -5048,82 +5059,256 @@ static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr)
 	       (!idxattr || idxattr == attrid);
 }
 
-#define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1)
-static int rtnl_get_offload_stats_attr_size(int attr_id)
+static bool
+rtnl_offload_xstats_have_ndo(const struct net_device *dev, int attr_id)
 {
-	switch (attr_id) {
-	case IFLA_OFFLOAD_XSTATS_CPU_HIT:
-		return sizeof(struct rtnl_link_stats64);
-	}
+	return dev->netdev_ops &&
+	       dev->netdev_ops->ndo_has_offload_stats &&
+	       dev->netdev_ops->ndo_get_offload_stats &&
+	       dev->netdev_ops->ndo_has_offload_stats(dev, attr_id);
+}
 
-	return 0;
+static unsigned int
+rtnl_offload_xstats_get_size_ndo(const struct net_device *dev, int attr_id)
+{
+	return rtnl_offload_xstats_have_ndo(dev, attr_id) ?
+	       sizeof(struct rtnl_link_stats64) : 0;
 }
 
-static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev,
-				  int *prividx)
+static int
+rtnl_offload_xstats_fill_ndo(struct net_device *dev, int attr_id,
+			     struct sk_buff *skb)
 {
+	unsigned int size = rtnl_offload_xstats_get_size_ndo(dev, attr_id);
 	struct nlattr *attr = NULL;
-	int attr_id, size;
 	void *attr_data;
 	int err;
 
-	if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
-	      dev->netdev_ops->ndo_get_offload_stats))
+	if (!size)
 		return -ENODATA;
 
-	for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
-	     attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
-		if (attr_id < *prividx)
-			continue;
+	attr = nla_reserve_64bit(skb, attr_id, size,
+				 IFLA_OFFLOAD_XSTATS_UNSPEC);
+	if (!attr)
+		return -EMSGSIZE;
 
-		size = rtnl_get_offload_stats_attr_size(attr_id);
-		if (!size)
-			continue;
+	attr_data = nla_data(attr);
+	memset(attr_data, 0, size);
 
-		if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
-			continue;
+	err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, attr_data);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static unsigned int
+rtnl_offload_xstats_get_size_stats(const struct net_device *dev,
+				   enum netdev_offload_xstats_type type)
+{
+	bool enabled = netdev_offload_xstats_enabled(dev, type);
+
+	return enabled ? sizeof(struct rtnl_hw_stats64) : 0;
+}
+
+struct rtnl_offload_xstats_request_used {
+	bool request;
+	bool used;
+};
+
+static int
+rtnl_offload_xstats_get_stats(struct net_device *dev,
+			      enum netdev_offload_xstats_type type,
+			      struct rtnl_offload_xstats_request_used *ru,
+			      struct rtnl_hw_stats64 *stats,
+			      struct netlink_ext_ack *extack)
+{
+	bool request;
+	bool used;
+	int err;
 
-		attr = nla_reserve_64bit(skb, attr_id, size,
+	request = netdev_offload_xstats_enabled(dev, type);
+	if (!request) {
+		used = false;
+		goto out;
+	}
+
+	err = netdev_offload_xstats_get(dev, type, stats, &used, extack);
+	if (err)
+		return err;
+
+out:
+	if (ru) {
+		ru->request = request;
+		ru->used = used;
+	}
+	return 0;
+}
+
+static int
+rtnl_offload_xstats_fill_hw_s_info_one(struct sk_buff *skb, int attr_id,
+				       struct rtnl_offload_xstats_request_used *ru)
+{
+	struct nlattr *nest;
+
+	nest = nla_nest_start(skb, attr_id);
+	if (!nest)
+		return -EMSGSIZE;
+
+	if (nla_put_u8(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST, ru->request))
+		goto nla_put_failure;
+
+	if (nla_put_u8(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED, ru->used))
+		goto nla_put_failure;
+
+	nla_nest_end(skb, nest);
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(skb, nest);
+	return -EMSGSIZE;
+}
+
+static int
+rtnl_offload_xstats_fill_hw_s_info(struct sk_buff *skb, struct net_device *dev,
+				   struct netlink_ext_ack *extack)
+{
+	enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
+	struct rtnl_offload_xstats_request_used ru_l3;
+	struct nlattr *nest;
+	int err;
+
+	err = rtnl_offload_xstats_get_stats(dev, t_l3, &ru_l3, NULL, extack);
+	if (err)
+		return err;
+
+	nest = nla_nest_start(skb, IFLA_OFFLOAD_XSTATS_HW_S_INFO);
+	if (!nest)
+		return -EMSGSIZE;
+
+	if (rtnl_offload_xstats_fill_hw_s_info_one(skb,
+						   IFLA_OFFLOAD_XSTATS_L3_STATS,
+						   &ru_l3))
+		goto nla_put_failure;
+
+	nla_nest_end(skb, nest);
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(skb, nest);
+	return -EMSGSIZE;
+}
+
+static int rtnl_offload_xstats_fill(struct sk_buff *skb, struct net_device *dev,
+				    int *prividx, u32 off_filter_mask,
+				    struct netlink_ext_ack *extack)
+{
+	enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
+	int attr_id_hw_s_info = IFLA_OFFLOAD_XSTATS_HW_S_INFO;
+	int attr_id_l3_stats = IFLA_OFFLOAD_XSTATS_L3_STATS;
+	int attr_id_cpu_hit = IFLA_OFFLOAD_XSTATS_CPU_HIT;
+	bool have_data = false;
+	int err;
+
+	if (*prividx <= attr_id_cpu_hit &&
+	    (off_filter_mask &
+	     IFLA_STATS_FILTER_BIT(attr_id_cpu_hit))) {
+		err = rtnl_offload_xstats_fill_ndo(dev, attr_id_cpu_hit, skb);
+		if (!err) {
+			have_data = true;
+		} else if (err != -ENODATA) {
+			*prividx = attr_id_cpu_hit;
+			return err;
+		}
+	}
+
+	if (*prividx <= attr_id_hw_s_info &&
+	    (off_filter_mask & IFLA_STATS_FILTER_BIT(attr_id_hw_s_info))) {
+		*prividx = attr_id_hw_s_info;
+
+		err = rtnl_offload_xstats_fill_hw_s_info(skb, dev, extack);
+		if (err)
+			return err;
+
+		have_data = true;
+		*prividx = 0;
+	}
+
+	if (*prividx <= attr_id_l3_stats &&
+	    (off_filter_mask & IFLA_STATS_FILTER_BIT(attr_id_l3_stats))) {
+		unsigned int size_l3;
+		struct nlattr *attr;
+
+		*prividx = attr_id_l3_stats;
+
+		size_l3 = rtnl_offload_xstats_get_size_stats(dev, t_l3);
+		attr = nla_reserve_64bit(skb, attr_id_l3_stats, size_l3,
 					 IFLA_OFFLOAD_XSTATS_UNSPEC);
 		if (!attr)
-			goto nla_put_failure;
+			return -EMSGSIZE;
 
-		attr_data = nla_data(attr);
-		memset(attr_data, 0, size);
-		err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev,
-							     attr_data);
+		err = rtnl_offload_xstats_get_stats(dev, t_l3, NULL,
+						    nla_data(attr), extack);
 		if (err)
-			goto get_offload_stats_failure;
+			return err;
+
+		have_data = true;
+		*prividx = 0;
 	}
 
-	if (!attr)
+	if (!have_data)
 		return -ENODATA;
 
 	*prividx = 0;
 	return 0;
+}
 
-nla_put_failure:
-	err = -EMSGSIZE;
-get_offload_stats_failure:
-	*prividx = attr_id;
-	return err;
+static unsigned int
+rtnl_offload_xstats_get_size_hw_s_info_one(const struct net_device *dev,
+					   enum netdev_offload_xstats_type type)
+{
+	bool enabled = netdev_offload_xstats_enabled(dev, type);
+
+	return nla_total_size(0) +
+		/* IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST */
+		nla_total_size(sizeof(u8)) +
+		/* IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED */
+		(enabled ? nla_total_size(sizeof(u8)) : 0) +
+		0;
+}
+
+static unsigned int
+rtnl_offload_xstats_get_size_hw_s_info(const struct net_device *dev)
+{
+	enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
+
+	return nla_total_size(0) +
+		/* IFLA_OFFLOAD_XSTATS_L3_STATS */
+		rtnl_offload_xstats_get_size_hw_s_info_one(dev, t_l3) +
+		0;
 }
 
-static int rtnl_get_offload_stats_size(const struct net_device *dev)
+static int rtnl_offload_xstats_get_size(const struct net_device *dev,
+					u32 off_filter_mask)
 {
+	enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
+	int attr_id_cpu_hit = IFLA_OFFLOAD_XSTATS_CPU_HIT;
 	int nla_size = 0;
-	int attr_id;
 	int size;
 
-	if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats &&
-	      dev->netdev_ops->ndo_get_offload_stats))
-		return 0;
+	if (off_filter_mask &
+	    IFLA_STATS_FILTER_BIT(attr_id_cpu_hit)) {
+		size = rtnl_offload_xstats_get_size_ndo(dev, attr_id_cpu_hit);
+		nla_size += nla_total_size_64bit(size);
+	}
 
-	for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST;
-	     attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) {
-		if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id))
-			continue;
-		size = rtnl_get_offload_stats_attr_size(attr_id);
+	if (off_filter_mask &
+	    IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO))
+		nla_size += rtnl_offload_xstats_get_size_hw_s_info(dev);
+
+	if (off_filter_mask &
+	    IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_L3_STATS)) {
+		size = rtnl_offload_xstats_get_size_stats(dev, t_l3);
 		nla_size += nla_total_size_64bit(size);
 	}
 
@@ -5133,11 +5318,21 @@ static int rtnl_get_offload_stats_size(const struct net_device *dev)
 	return nla_size;
 }
 
+struct rtnl_stats_dump_filters {
+	/* mask[0] filters outer attributes. Then individual nests have their
+	 * filtering mask at the index of the nested attribute.
+	 */
+	u32 mask[IFLA_STATS_MAX + 1];
+};
+
 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
 			       int type, u32 pid, u32 seq, u32 change,
-			       unsigned int flags, unsigned int filter_mask,
-			       int *idxattr, int *prividx)
+			       unsigned int flags,
+			       const struct rtnl_stats_dump_filters *filters,
+			       int *idxattr, int *prividx,
+			       struct netlink_ext_ack *extack)
 {
+	unsigned int filter_mask = filters->mask[0];
 	struct if_stats_msg *ifsm;
 	struct nlmsghdr *nlh;
 	struct nlattr *attr;
@@ -5163,8 +5358,10 @@ static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
 		attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64,
 					 sizeof(struct rtnl_link_stats64),
 					 IFLA_STATS_UNSPEC);
-		if (!attr)
+		if (!attr) {
+			err = -EMSGSIZE;
 			goto nla_put_failure;
+		}
 
 		sp = nla_data(attr);
 		dev_get_stats(dev, sp);
@@ -5177,8 +5374,10 @@ static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
 			*idxattr = IFLA_STATS_LINK_XSTATS;
 			attr = nla_nest_start_noflag(skb,
 						     IFLA_STATS_LINK_XSTATS);
-			if (!attr)
+			if (!attr) {
+				err = -EMSGSIZE;
 				goto nla_put_failure;
+			}
 
 			err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
 			nla_nest_end(skb, attr);
@@ -5200,8 +5399,10 @@ static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
 			*idxattr = IFLA_STATS_LINK_XSTATS_SLAVE;
 			attr = nla_nest_start_noflag(skb,
 						     IFLA_STATS_LINK_XSTATS_SLAVE);
-			if (!attr)
+			if (!attr) {
+				err = -EMSGSIZE;
 				goto nla_put_failure;
+			}
 
 			err = ops->fill_linkxstats(skb, dev, prividx, *idxattr);
 			nla_nest_end(skb, attr);
@@ -5213,13 +5414,19 @@ static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
 
 	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS,
 			     *idxattr)) {
+		u32 off_filter_mask;
+
+		off_filter_mask = filters->mask[IFLA_STATS_LINK_OFFLOAD_XSTATS];
 		*idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS;
 		attr = nla_nest_start_noflag(skb,
 					     IFLA_STATS_LINK_OFFLOAD_XSTATS);
-		if (!attr)
+		if (!attr) {
+			err = -EMSGSIZE;
 			goto nla_put_failure;
+		}
 
-		err = rtnl_get_offload_stats(skb, dev, prividx);
+		err = rtnl_offload_xstats_fill(skb, dev, prividx,
+					       off_filter_mask, extack);
 		if (err == -ENODATA)
 			nla_nest_cancel(skb, attr);
 		else
@@ -5235,19 +5442,21 @@ static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
 
 		*idxattr = IFLA_STATS_AF_SPEC;
 		attr = nla_nest_start_noflag(skb, IFLA_STATS_AF_SPEC);
-		if (!attr)
+		if (!attr) {
+			err = -EMSGSIZE;
 			goto nla_put_failure;
+		}
 
 		rcu_read_lock();
 		list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) {
 			if (af_ops->fill_stats_af) {
 				struct nlattr *af;
-				int err;
 
 				af = nla_nest_start_noflag(skb,
 							   af_ops->family);
 				if (!af) {
 					rcu_read_unlock();
+					err = -EMSGSIZE;
 					goto nla_put_failure;
 				}
 				err = af_ops->fill_stats_af(skb, dev);
@@ -5280,13 +5489,14 @@ nla_put_failure:
 	else
 		nlmsg_end(skb, nlh);
 
-	return -EMSGSIZE;
+	return err;
 }
 
 static size_t if_nlmsg_stats_size(const struct net_device *dev,
-				  u32 filter_mask)
+				  const struct rtnl_stats_dump_filters *filters)
 {
 	size_t size = NLMSG_ALIGN(sizeof(struct if_stats_msg));
+	unsigned int filter_mask = filters->mask[0];
 
 	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0))
 		size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64));
@@ -5322,8 +5532,12 @@ static size_t if_nlmsg_stats_size(const struct net_device *dev,
 		}
 	}
 
-	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
-		size += rtnl_get_offload_stats_size(dev);
+	if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) {
+		u32 off_filter_mask;
+
+		off_filter_mask = filters->mask[IFLA_STATS_LINK_OFFLOAD_XSTATS];
+		size += rtnl_offload_xstats_get_size(dev, off_filter_mask);
+	}
 
 	if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
 		struct rtnl_af_ops *af_ops;
@@ -5347,6 +5561,79 @@ static size_t if_nlmsg_stats_size(const struct net_device *dev,
 	return size;
 }
 
+#define RTNL_STATS_OFFLOAD_XSTATS_VALID ((1 << __IFLA_OFFLOAD_XSTATS_MAX) - 1)
+
+static const struct nla_policy
+rtnl_stats_get_policy_filters[IFLA_STATS_MAX + 1] = {
+	[IFLA_STATS_LINK_OFFLOAD_XSTATS] =
+		    NLA_POLICY_MASK(NLA_U32, RTNL_STATS_OFFLOAD_XSTATS_VALID),
+};
+
+static const struct nla_policy
+rtnl_stats_get_policy[IFLA_STATS_GETSET_MAX + 1] = {
+	[IFLA_STATS_GET_FILTERS] =
+		    NLA_POLICY_NESTED(rtnl_stats_get_policy_filters),
+};
+
+static const struct nla_policy
+ifla_stats_set_policy[IFLA_STATS_GETSET_MAX + 1] = {
+	[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS] = NLA_POLICY_MAX(NLA_U8, 1),
+};
+
+static int rtnl_stats_get_parse_filters(struct nlattr *ifla_filters,
+					struct rtnl_stats_dump_filters *filters,
+					struct netlink_ext_ack *extack)
+{
+	struct nlattr *tb[IFLA_STATS_MAX + 1];
+	int err;
+	int at;
+
+	err = nla_parse_nested(tb, IFLA_STATS_MAX, ifla_filters,
+			       rtnl_stats_get_policy_filters, extack);
+	if (err < 0)
+		return err;
+
+	for (at = 1; at <= IFLA_STATS_MAX; at++) {
+		if (tb[at]) {
+			if (!(filters->mask[0] & IFLA_STATS_FILTER_BIT(at))) {
+				NL_SET_ERR_MSG(extack, "Filtered attribute not enabled in filter_mask");
+				return -EINVAL;
+			}
+			filters->mask[at] = nla_get_u32(tb[at]);
+		}
+	}
+
+	return 0;
+}
+
+static int rtnl_stats_get_parse(const struct nlmsghdr *nlh,
+				u32 filter_mask,
+				struct rtnl_stats_dump_filters *filters,
+				struct netlink_ext_ack *extack)
+{
+	struct nlattr *tb[IFLA_STATS_GETSET_MAX + 1];
+	int err;
+	int i;
+
+	filters->mask[0] = filter_mask;
+	for (i = 1; i < ARRAY_SIZE(filters->mask); i++)
+		filters->mask[i] = -1U;
+
+	err = nlmsg_parse(nlh, sizeof(struct if_stats_msg), tb,
+			  IFLA_STATS_GETSET_MAX, rtnl_stats_get_policy, extack);
+	if (err < 0)
+		return err;
+
+	if (tb[IFLA_STATS_GET_FILTERS]) {
+		err = rtnl_stats_get_parse_filters(tb[IFLA_STATS_GET_FILTERS],
+						   filters, extack);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
 static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check,
 				bool is_dump, struct netlink_ext_ack *extack)
 {
@@ -5369,10 +5656,6 @@ static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check,
 		NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request");
 		return -EINVAL;
 	}
-	if (nlmsg_attrlen(nlh, sizeof(*ifsm))) {
-		NL_SET_ERR_MSG(extack, "Invalid attributes after stats header");
-		return -EINVAL;
-	}
 	if (ifsm->filter_mask >= IFLA_STATS_FILTER_BIT(IFLA_STATS_MAX + 1)) {
 		NL_SET_ERR_MSG(extack, "Invalid stats requested through filter mask");
 		return -EINVAL;
@@ -5384,12 +5667,12 @@ static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check,
 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
 			  struct netlink_ext_ack *extack)
 {
+	struct rtnl_stats_dump_filters filters;
 	struct net *net = sock_net(skb->sk);
 	struct net_device *dev = NULL;
 	int idxattr = 0, prividx = 0;
 	struct if_stats_msg *ifsm;
 	struct sk_buff *nskb;
-	u32 filter_mask;
 	int err;
 
 	err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
@@ -5406,17 +5689,22 @@ static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
 	if (!dev)
 		return -ENODEV;
 
-	filter_mask = ifsm->filter_mask;
-	if (!filter_mask)
+	if (!ifsm->filter_mask) {
+		NL_SET_ERR_MSG(extack, "Filter mask must be set for stats get");
 		return -EINVAL;
+	}
+
+	err = rtnl_stats_get_parse(nlh, ifsm->filter_mask, &filters, extack);
+	if (err)
+		return err;
 
-	nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL);
+	nskb = nlmsg_new(if_nlmsg_stats_size(dev, &filters), GFP_KERNEL);
 	if (!nskb)
 		return -ENOBUFS;
 
 	err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS,
 				  NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0,
-				  0, filter_mask, &idxattr, &prividx);
+				  0, &filters, &idxattr, &prividx, extack);
 	if (err < 0) {
 		/* -EMSGSIZE implies BUG in if_nlmsg_stats_size */
 		WARN_ON(err == -EMSGSIZE);
@@ -5432,12 +5720,12 @@ static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
 {
 	struct netlink_ext_ack *extack = cb->extack;
 	int h, s_h, err, s_idx, s_idxattr, s_prividx;
+	struct rtnl_stats_dump_filters filters;
 	struct net *net = sock_net(skb->sk);
 	unsigned int flags = NLM_F_MULTI;
 	struct if_stats_msg *ifsm;
 	struct hlist_head *head;
 	struct net_device *dev;
-	u32 filter_mask = 0;
 	int idx = 0;
 
 	s_h = cb->args[0];
@@ -5452,12 +5740,16 @@ static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
 		return err;
 
 	ifsm = nlmsg_data(cb->nlh);
-	filter_mask = ifsm->filter_mask;
-	if (!filter_mask) {
+	if (!ifsm->filter_mask) {
 		NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump");
 		return -EINVAL;
 	}
 
+	err = rtnl_stats_get_parse(cb->nlh, ifsm->filter_mask, &filters,
+				   extack);
+	if (err)
+		return err;
+
 	for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
 		idx = 0;
 		head = &net->dev_index_head[h];
@@ -5467,8 +5759,9 @@ static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb)
 			err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS,
 						  NETLINK_CB(cb->skb).portid,
 						  cb->nlh->nlmsg_seq, 0,
-						  flags, filter_mask,
-						  &s_idxattr, &s_prividx);
+						  flags, &filters,
+						  &s_idxattr, &s_prividx,
+						  extack);
 			/* If we ran out of room on the first message,
 			 * we're in trouble
 			 */
@@ -5492,6 +5785,107 @@ out:
 	return skb->len;
 }
 
+void rtnl_offload_xstats_notify(struct net_device *dev)
+{
+	struct rtnl_stats_dump_filters response_filters = {};
+	struct net *net = dev_net(dev);
+	int idxattr = 0, prividx = 0;
+	struct sk_buff *skb;
+	int err = -ENOBUFS;
+
+	ASSERT_RTNL();
+
+	response_filters.mask[0] |=
+		IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_OFFLOAD_XSTATS);
+	response_filters.mask[IFLA_STATS_LINK_OFFLOAD_XSTATS] |=
+		IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO);
+
+	skb = nlmsg_new(if_nlmsg_stats_size(dev, &response_filters),
+			GFP_KERNEL);
+	if (!skb)
+		goto errout;
+
+	err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 0, 0, 0, 0,
+				  &response_filters, &idxattr, &prividx, NULL);
+	if (err < 0) {
+		kfree_skb(skb);
+		goto errout;
+	}
+
+	rtnl_notify(skb, net, 0, RTNLGRP_STATS, NULL, GFP_KERNEL);
+	return;
+
+errout:
+	rtnl_set_sk_err(net, RTNLGRP_STATS, err);
+}
+EXPORT_SYMBOL(rtnl_offload_xstats_notify);
+
+static int rtnl_stats_set(struct sk_buff *skb, struct nlmsghdr *nlh,
+			  struct netlink_ext_ack *extack)
+{
+	enum netdev_offload_xstats_type t_l3 = NETDEV_OFFLOAD_XSTATS_TYPE_L3;
+	struct rtnl_stats_dump_filters response_filters = {};
+	struct nlattr *tb[IFLA_STATS_GETSET_MAX + 1];
+	struct net *net = sock_net(skb->sk);
+	struct net_device *dev = NULL;
+	struct if_stats_msg *ifsm;
+	bool notify = false;
+	int err;
+
+	err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb),
+				   false, extack);
+	if (err)
+		return err;
+
+	ifsm = nlmsg_data(nlh);
+	if (ifsm->family != AF_UNSPEC) {
+		NL_SET_ERR_MSG(extack, "Address family should be AF_UNSPEC");
+		return -EINVAL;
+	}
+
+	if (ifsm->ifindex > 0)
+		dev = __dev_get_by_index(net, ifsm->ifindex);
+	else
+		return -EINVAL;
+
+	if (!dev)
+		return -ENODEV;
+
+	if (ifsm->filter_mask) {
+		NL_SET_ERR_MSG(extack, "Filter mask must be 0 for stats set");
+		return -EINVAL;
+	}
+
+	err = nlmsg_parse(nlh, sizeof(*ifsm), tb, IFLA_STATS_GETSET_MAX,
+			  ifla_stats_set_policy, extack);
+	if (err < 0)
+		return err;
+
+	if (tb[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS]) {
+		u8 req = nla_get_u8(tb[IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS]);
+
+		if (req)
+			err = netdev_offload_xstats_enable(dev, t_l3, extack);
+		else
+			err = netdev_offload_xstats_disable(dev, t_l3);
+
+		if (!err)
+			notify = true;
+		else if (err != -EALREADY)
+			return err;
+
+		response_filters.mask[0] |=
+			IFLA_STATS_FILTER_BIT(IFLA_STATS_LINK_OFFLOAD_XSTATS);
+		response_filters.mask[IFLA_STATS_LINK_OFFLOAD_XSTATS] |=
+			IFLA_STATS_FILTER_BIT(IFLA_OFFLOAD_XSTATS_HW_S_INFO);
+	}
+
+	if (notify)
+		rtnl_offload_xstats_notify(dev);
+
+	return 0;
+}
+
 /* Process one rtnetlink message. */
 
 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
@@ -5717,4 +6111,5 @@ void __init rtnetlink_init(void)
 
 	rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump,
 		      0);
+	rtnl_register(PF_UNSPEC, RTM_SETSTATS, rtnl_stats_set, NULL, 0);
 }
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index ea51e23e9247..10bde7c6db44 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -201,7 +201,7 @@ static void __build_skb_around(struct sk_buff *skb, void *data,
 	skb->head = data;
 	skb->data = data;
 	skb_reset_tail_pointer(skb);
-	skb->end = skb->tail + size;
+	skb_set_end_offset(skb, size);
 	skb->mac_header = (typeof(skb->mac_header))~0U;
 	skb->transport_header = (typeof(skb->transport_header))~0U;
 
@@ -777,16 +777,17 @@ void kfree_skb_reason(struct sk_buff *skb, enum skb_drop_reason reason)
 }
 EXPORT_SYMBOL(kfree_skb_reason);
 
-void kfree_skb_list(struct sk_buff *segs)
+void kfree_skb_list_reason(struct sk_buff *segs,
+			   enum skb_drop_reason reason)
 {
 	while (segs) {
 		struct sk_buff *next = segs->next;
 
-		kfree_skb(segs);
+		kfree_skb_reason(segs, reason);
 		segs = next;
 	}
 }
-EXPORT_SYMBOL(kfree_skb_list);
+EXPORT_SYMBOL(kfree_skb_list_reason);
 
 /* Dump skb information and contents.
  *
@@ -1736,11 +1737,10 @@ int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail,
 	skb->head     = data;
 	skb->head_frag = 0;
 	skb->data    += off;
+
+	skb_set_end_offset(skb, size);
 #ifdef NET_SKBUFF_DATA_USES_OFFSET
-	skb->end      = size;
 	off           = nhead;
-#else
-	skb->end      = skb->head + size;
 #endif
 	skb->tail	      += off;
 	skb_headers_offset_update(skb, nhead);
@@ -1788,6 +1788,38 @@ struct sk_buff *skb_realloc_headroom(struct sk_buff *skb, unsigned int headroom)
 }
 EXPORT_SYMBOL(skb_realloc_headroom);
 
+int __skb_unclone_keeptruesize(struct sk_buff *skb, gfp_t pri)
+{
+	unsigned int saved_end_offset, saved_truesize;
+	struct skb_shared_info *shinfo;
+	int res;
+
+	saved_end_offset = skb_end_offset(skb);
+	saved_truesize = skb->truesize;
+
+	res = pskb_expand_head(skb, 0, 0, pri);
+	if (res)
+		return res;
+
+	skb->truesize = saved_truesize;
+
+	if (likely(skb_end_offset(skb) == saved_end_offset))
+		return 0;
+
+	shinfo = skb_shinfo(skb);
+
+	/* We are about to change back skb->end,
+	 * we need to move skb_shinfo() to its new location.
+	 */
+	memmove(skb->head + saved_end_offset,
+		shinfo,
+		offsetof(struct skb_shared_info, frags[shinfo->nr_frags]));
+
+	skb_set_end_offset(skb, saved_end_offset);
+
+	return 0;
+}
+
 /**
  *	skb_expand_head - reallocate header of &sk_buff
  *	@skb: buffer to reallocate
@@ -4820,7 +4852,7 @@ void __skb_tstamp_tx(struct sk_buff *orig_skb,
 	if (hwtstamps)
 		*skb_hwtstamps(skb) = *hwtstamps;
 	else
-		skb->tstamp = ktime_get_real();
+		__net_timestamp(skb);
 
 	__skb_complete_tx_timestamp(skb, sk, tstype, opt_stats);
 }
@@ -5350,7 +5382,7 @@ void skb_scrub_packet(struct sk_buff *skb, bool xnet)
 
 	ipvs_reset(skb);
 	skb->mark = 0;
-	skb->tstamp = 0;
+	skb_clear_tstamp(skb);
 }
 EXPORT_SYMBOL_GPL(skb_scrub_packet);
 
@@ -6044,11 +6076,7 @@ static int pskb_carve_inside_header(struct sk_buff *skb, const u32 off,
 	skb->head = data;
 	skb->data = data;
 	skb->head_frag = 0;
-#ifdef NET_SKBUFF_DATA_USES_OFFSET
-	skb->end = size;
-#else
-	skb->end = skb->head + size;
-#endif
+	skb_set_end_offset(skb, size);
 	skb_set_tail_pointer(skb, skb_headlen(skb));
 	skb_headers_offset_update(skb, 0);
 	skb->cloned = 0;
@@ -6186,11 +6214,7 @@ static int pskb_carve_inside_nonlinear(struct sk_buff *skb, const u32 off,
 	skb->head = data;
 	skb->head_frag = 0;
 	skb->data = data;
-#ifdef NET_SKBUFF_DATA_USES_OFFSET
-	skb->end = size;
-#else
-	skb->end = skb->head + size;
-#endif
+	skb_set_end_offset(skb, size);
 	skb_reset_tail_pointer(skb);
 	skb_headers_offset_update(skb, 0);
 	skb->cloned   = 0;
diff --git a/net/core/skmsg.c b/net/core/skmsg.c
index 929a2b096b04..cc381165ea08 100644
--- a/net/core/skmsg.c
+++ b/net/core/skmsg.c
@@ -27,6 +27,7 @@ int sk_msg_alloc(struct sock *sk, struct sk_msg *msg, int len,
 		 int elem_first_coalesce)
 {
 	struct page_frag *pfrag = sk_page_frag(sk);
+	u32 osize = msg->sg.size;
 	int ret = 0;
 
 	len -= msg->sg.size;
@@ -35,13 +36,17 @@ int sk_msg_alloc(struct sock *sk, struct sk_msg *msg, int len,
 		u32 orig_offset;
 		int use, i;
 
-		if (!sk_page_frag_refill(sk, pfrag))
-			return -ENOMEM;
+		if (!sk_page_frag_refill(sk, pfrag)) {
+			ret = -ENOMEM;
+			goto msg_trim;
+		}
 
 		orig_offset = pfrag->offset;
 		use = min_t(int, len, pfrag->size - orig_offset);
-		if (!sk_wmem_schedule(sk, use))
-			return -ENOMEM;
+		if (!sk_wmem_schedule(sk, use)) {
+			ret = -ENOMEM;
+			goto msg_trim;
+		}
 
 		i = msg->sg.end;
 		sk_msg_iter_var_prev(i);
@@ -71,6 +76,10 @@ int sk_msg_alloc(struct sock *sk, struct sk_msg *msg, int len,
 	}
 
 	return ret;
+
+msg_trim:
+	sk_msg_trim(sk, msg, osize);
+	return ret;
 }
 EXPORT_SYMBOL_GPL(sk_msg_alloc);
 
diff --git a/net/core/sock.c b/net/core/sock.c
index 6eb174805bf0..1180a0cb0110 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1377,9 +1377,9 @@ set_sndbuf:
 			if (!(sk_is_tcp(sk) ||
 			      (sk->sk_type == SOCK_DGRAM &&
 			       sk->sk_protocol == IPPROTO_UDP)))
-				ret = -ENOTSUPP;
+				ret = -EOPNOTSUPP;
 		} else if (sk->sk_family != PF_RDS) {
-			ret = -ENOTSUPP;
+			ret = -EOPNOTSUPP;
 		}
 		if (!ret) {
 			if (val < 0 || val > 1)
@@ -1447,6 +1447,15 @@ set_sndbuf:
 		break;
 	}
 
+	case SO_TXREHASH:
+		if (val < -1 || val > 1) {
+			ret = -EINVAL;
+			break;
+		}
+		/* Paired with READ_ONCE() in tcp_rtx_synack() */
+		WRITE_ONCE(sk->sk_txrehash, (u8)val);
+		break;
+
 	default:
 		ret = -ENOPROTOOPT;
 		break;
@@ -1834,6 +1843,10 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
 		v.val = sk->sk_reserved_mem;
 		break;
 
+	case SO_TXREHASH:
+		v.val = sk->sk_txrehash;
+		break;
+
 	default:
 		/* We implement the SO_SNDLOWAT etc to not be settable
 		 * (1003.1g 7).
@@ -2266,6 +2279,7 @@ void sk_setup_caps(struct sock *sk, struct dst_entry *dst)
 			sk->sk_route_caps |= NETIF_F_SG | NETIF_F_HW_CSUM;
 			/* pairs with the WRITE_ONCE() in netif_set_gso_max_size() */
 			sk->sk_gso_max_size = READ_ONCE(dst->dev->gso_max_size);
+			sk->sk_gso_max_size -= (MAX_TCP_HEADER + 1);
 			/* pairs with the WRITE_ONCE() in netif_set_gso_max_segs() */
 			max_segs = max_t(u32, READ_ONCE(dst->dev->gso_max_segs), 1);
 		}
@@ -2611,7 +2625,8 @@ int __sock_cmsg_send(struct sock *sk, struct msghdr *msg, struct cmsghdr *cmsg,
 
 	switch (cmsg->cmsg_type) {
 	case SO_MARK:
-		if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
+		if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_RAW) &&
+		    !ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
 			return -EPERM;
 		if (cmsg->cmsg_len != CMSG_LEN(sizeof(u32)))
 			return -EINVAL;
@@ -3278,6 +3293,7 @@ void sock_init_data(struct socket *sock, struct sock *sk)
 	sk->sk_pacing_rate = ~0UL;
 	WRITE_ONCE(sk->sk_pacing_shift, 10);
 	sk->sk_incoming_cpu = -1;
+	sk->sk_txrehash = SOCK_TXREHASH_DEFAULT;
 
 	sk_rx_queue_clear(sk);
 	/*
@@ -3702,6 +3718,10 @@ int proto_register(struct proto *prot, int alloc_slab)
 {
 	int ret = -ENOBUFS;
 
+	if (prot->memory_allocated && !prot->sysctl_mem) {
+		pr_err("%s: missing sysctl_mem\n", prot->name);
+		return -EINVAL;
+	}
 	if (alloc_slab) {
 		prot->slab = kmem_cache_create_usercopy(prot->name,
 					prot->obj_size, 0,
diff --git a/net/core/sock_map.c b/net/core/sock_map.c
index 1827669eedd6..2d213c4011db 100644
--- a/net/core/sock_map.c
+++ b/net/core/sock_map.c
@@ -1416,38 +1416,50 @@ static struct sk_psock_progs *sock_map_progs(struct bpf_map *map)
 	return NULL;
 }
 
-static int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog,
-				struct bpf_prog *old, u32 which)
+static int sock_map_prog_lookup(struct bpf_map *map, struct bpf_prog ***pprog,
+				u32 which)
 {
 	struct sk_psock_progs *progs = sock_map_progs(map);
-	struct bpf_prog **pprog;
 
 	if (!progs)
 		return -EOPNOTSUPP;
 
 	switch (which) {
 	case BPF_SK_MSG_VERDICT:
-		pprog = &progs->msg_parser;
+		*pprog = &progs->msg_parser;
 		break;
 #if IS_ENABLED(CONFIG_BPF_STREAM_PARSER)
 	case BPF_SK_SKB_STREAM_PARSER:
-		pprog = &progs->stream_parser;
+		*pprog = &progs->stream_parser;
 		break;
 #endif
 	case BPF_SK_SKB_STREAM_VERDICT:
 		if (progs->skb_verdict)
 			return -EBUSY;
-		pprog = &progs->stream_verdict;
+		*pprog = &progs->stream_verdict;
 		break;
 	case BPF_SK_SKB_VERDICT:
 		if (progs->stream_verdict)
 			return -EBUSY;
-		pprog = &progs->skb_verdict;
+		*pprog = &progs->skb_verdict;
 		break;
 	default:
 		return -EOPNOTSUPP;
 	}
 
+	return 0;
+}
+
+static int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog,
+				struct bpf_prog *old, u32 which)
+{
+	struct bpf_prog **pprog;
+	int ret;
+
+	ret = sock_map_prog_lookup(map, &pprog, which);
+	if (ret)
+		return ret;
+
 	if (old)
 		return psock_replace_prog(pprog, prog, old);
 
@@ -1455,6 +1467,57 @@ static int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog,
 	return 0;
 }
 
+int sock_map_bpf_prog_query(const union bpf_attr *attr,
+			    union bpf_attr __user *uattr)
+{
+	__u32 __user *prog_ids = u64_to_user_ptr(attr->query.prog_ids);
+	u32 prog_cnt = 0, flags = 0, ufd = attr->target_fd;
+	struct bpf_prog **pprog;
+	struct bpf_prog *prog;
+	struct bpf_map *map;
+	struct fd f;
+	u32 id = 0;
+	int ret;
+
+	if (attr->query.query_flags)
+		return -EINVAL;
+
+	f = fdget(ufd);
+	map = __bpf_map_get(f);
+	if (IS_ERR(map))
+		return PTR_ERR(map);
+
+	rcu_read_lock();
+
+	ret = sock_map_prog_lookup(map, &pprog, attr->query.attach_type);
+	if (ret)
+		goto end;
+
+	prog = *pprog;
+	prog_cnt = !prog ? 0 : 1;
+
+	if (!attr->query.prog_cnt || !prog_ids || !prog_cnt)
+		goto end;
+
+	/* we do not hold the refcnt, the bpf prog may be released
+	 * asynchronously and the id would be set to 0.
+	 */
+	id = data_race(prog->aux->id);
+	if (id == 0)
+		prog_cnt = 0;
+
+end:
+	rcu_read_unlock();
+
+	if (copy_to_user(&uattr->query.attach_flags, &flags, sizeof(flags)) ||
+	    (id != 0 && copy_to_user(prog_ids, &id, sizeof(u32))) ||
+	    copy_to_user(&uattr->query.prog_cnt, &prog_cnt, sizeof(prog_cnt)))
+		ret = -EFAULT;
+
+	fdput(f);
+	return ret;
+}
+
 static void sock_map_unlink(struct sock *sk, struct sk_psock_link *link)
 {
 	switch (link->map->map_type) {
diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c
index 7b4d485aac7a..7123fe7feeac 100644
--- a/net/core/sysctl_net_core.c
+++ b/net/core/sysctl_net_core.c
@@ -103,8 +103,7 @@ static int rps_sock_flow_sysctl(struct ctl_table *table, int write,
 			if (orig_sock_table) {
 				static_branch_dec(&rps_needed);
 				static_branch_dec(&rfs_needed);
-				synchronize_rcu();
-				vfree(orig_sock_table);
+				kvfree_rcu(orig_sock_table);
 			}
 		}
 	}
@@ -142,8 +141,7 @@ static int flow_limit_cpu_sysctl(struct ctl_table *table, int write,
 				     lockdep_is_held(&flow_limit_update_mutex));
 			if (cur && !cpumask_test_cpu(i, mask)) {
 				RCU_INIT_POINTER(sd->flow_limit, NULL);
-				synchronize_rcu();
-				kfree(cur);
+				kfree_rcu(cur);
 			} else if (!cur && cpumask_test_cpu(i, mask)) {
 				cur = kzalloc_node(len, GFP_KERNEL,
 						   cpu_to_node(i));
@@ -593,6 +591,15 @@ static struct ctl_table netns_core_table[] = {
 		.extra1		= SYSCTL_ZERO,
 		.proc_handler	= proc_dointvec_minmax
 	},
+	{
+		.procname	= "txrehash",
+		.data		= &init_net.core.sysctl_txrehash,
+		.maxlen		= sizeof(u8),
+		.mode		= 0644,
+		.extra1		= SYSCTL_ZERO,
+		.extra2		= SYSCTL_ONE,
+		.proc_handler	= proc_dou8vec_minmax,
+	},
 	{ }
 };
 
@@ -611,7 +618,7 @@ __setup("fb_tunnels=", fb_tunnels_only_for_init_net_sysctl_setup);
 
 static __net_init int sysctl_core_net_init(struct net *net)
 {
-	struct ctl_table *tbl;
+	struct ctl_table *tbl, *tmp;
 
 	tbl = netns_core_table;
 	if (!net_eq(net, &init_net)) {
@@ -619,7 +626,8 @@ static __net_init int sysctl_core_net_init(struct net *net)
 		if (tbl == NULL)
 			goto err_dup;
 
-		tbl[0].data = &net->core.sysctl_somaxconn;
+		for (tmp = tbl; tmp->procname; tmp++)
+			tmp->data += (char *)net - (char *)&init_net;
 
 		/* Don't export any sysctls to unprivileged users */
 		if (net->user_ns != &init_user_ns) {
diff --git a/net/core/utils.c b/net/core/utils.c
index 1f31a39236d5..938495bc1d34 100644
--- a/net/core/utils.c
+++ b/net/core/utils.c
@@ -476,9 +476,9 @@ void inet_proto_csum_replace_by_diff(__sum16 *sum, struct sk_buff *skb,
 				     __wsum diff, bool pseudohdr)
 {
 	if (skb->ip_summed != CHECKSUM_PARTIAL) {
-		*sum = csum_fold(csum_add(diff, ~csum_unfold(*sum)));
+		csum_replace_by_diff(sum, diff);
 		if (skb->ip_summed == CHECKSUM_COMPLETE && pseudohdr)
-			skb->csum = ~csum_add(diff, ~skb->csum);
+			skb->csum = ~csum_sub(diff, skb->csum);
 	} else if (pseudohdr) {
 		*sum = ~csum_fold(csum_add(diff, csum_unfold(*sum)));
 	}
diff --git a/net/core/xdp.c b/net/core/xdp.c
index 73fae16264e1..24420209bf0e 100644
--- a/net/core/xdp.c
+++ b/net/core/xdp.c
@@ -162,8 +162,9 @@ static void xdp_rxq_info_init(struct xdp_rxq_info *xdp_rxq)
 }
 
 /* Returns 0 on success, negative on failure */
-int xdp_rxq_info_reg(struct xdp_rxq_info *xdp_rxq,
-		     struct net_device *dev, u32 queue_index, unsigned int napi_id)
+int __xdp_rxq_info_reg(struct xdp_rxq_info *xdp_rxq,
+		       struct net_device *dev, u32 queue_index,
+		       unsigned int napi_id, u32 frag_size)
 {
 	if (!dev) {
 		WARN(1, "Missing net_device from driver");
@@ -185,11 +186,12 @@ int xdp_rxq_info_reg(struct xdp_rxq_info *xdp_rxq,
 	xdp_rxq->dev = dev;
 	xdp_rxq->queue_index = queue_index;
 	xdp_rxq->napi_id = napi_id;
+	xdp_rxq->frag_size = frag_size;
 
 	xdp_rxq->reg_state = REG_STATE_REGISTERED;
 	return 0;
 }
-EXPORT_SYMBOL_GPL(xdp_rxq_info_reg);
+EXPORT_SYMBOL_GPL(__xdp_rxq_info_reg);
 
 void xdp_rxq_info_unused(struct xdp_rxq_info *xdp_rxq)
 {
@@ -370,8 +372,8 @@ EXPORT_SYMBOL_GPL(xdp_rxq_info_reg_mem_model);
  * is used for those calls sites.  Thus, allowing for faster recycling
  * of xdp_frames/pages in those cases.
  */
-static void __xdp_return(void *data, struct xdp_mem_info *mem, bool napi_direct,
-			 struct xdp_buff *xdp)
+void __xdp_return(void *data, struct xdp_mem_info *mem, bool napi_direct,
+		  struct xdp_buff *xdp)
 {
 	struct xdp_mem_allocator *xa;
 	struct page *page;
@@ -407,12 +409,38 @@ static void __xdp_return(void *data, struct xdp_mem_info *mem, bool napi_direct,
 
 void xdp_return_frame(struct xdp_frame *xdpf)
 {
+	struct skb_shared_info *sinfo;
+	int i;
+
+	if (likely(!xdp_frame_has_frags(xdpf)))
+		goto out;
+
+	sinfo = xdp_get_shared_info_from_frame(xdpf);
+	for (i = 0; i < sinfo->nr_frags; i++) {
+		struct page *page = skb_frag_page(&sinfo->frags[i]);
+
+		__xdp_return(page_address(page), &xdpf->mem, false, NULL);
+	}
+out:
 	__xdp_return(xdpf->data, &xdpf->mem, false, NULL);
 }
 EXPORT_SYMBOL_GPL(xdp_return_frame);
 
 void xdp_return_frame_rx_napi(struct xdp_frame *xdpf)
 {
+	struct skb_shared_info *sinfo;
+	int i;
+
+	if (likely(!xdp_frame_has_frags(xdpf)))
+		goto out;
+
+	sinfo = xdp_get_shared_info_from_frame(xdpf);
+	for (i = 0; i < sinfo->nr_frags; i++) {
+		struct page *page = skb_frag_page(&sinfo->frags[i]);
+
+		__xdp_return(page_address(page), &xdpf->mem, true, NULL);
+	}
+out:
 	__xdp_return(xdpf->data, &xdpf->mem, true, NULL);
 }
 EXPORT_SYMBOL_GPL(xdp_return_frame_rx_napi);
@@ -448,7 +476,7 @@ void xdp_return_frame_bulk(struct xdp_frame *xdpf,
 	struct xdp_mem_allocator *xa;
 
 	if (mem->type != MEM_TYPE_PAGE_POOL) {
-		__xdp_return(xdpf->data, &xdpf->mem, false, NULL);
+		xdp_return_frame(xdpf);
 		return;
 	}
 
@@ -467,14 +495,41 @@ void xdp_return_frame_bulk(struct xdp_frame *xdpf,
 		bq->xa = rhashtable_lookup(mem_id_ht, &mem->id, mem_id_rht_params);
 	}
 
+	if (unlikely(xdp_frame_has_frags(xdpf))) {
+		struct skb_shared_info *sinfo;
+		int i;
+
+		sinfo = xdp_get_shared_info_from_frame(xdpf);
+		for (i = 0; i < sinfo->nr_frags; i++) {
+			skb_frag_t *frag = &sinfo->frags[i];
+
+			bq->q[bq->count++] = skb_frag_address(frag);
+			if (bq->count == XDP_BULK_QUEUE_SIZE)
+				xdp_flush_frame_bulk(bq);
+		}
+	}
 	bq->q[bq->count++] = xdpf->data;
 }
 EXPORT_SYMBOL_GPL(xdp_return_frame_bulk);
 
 void xdp_return_buff(struct xdp_buff *xdp)
 {
+	struct skb_shared_info *sinfo;
+	int i;
+
+	if (likely(!xdp_buff_has_frags(xdp)))
+		goto out;
+
+	sinfo = xdp_get_shared_info_from_buff(xdp);
+	for (i = 0; i < sinfo->nr_frags; i++) {
+		struct page *page = skb_frag_page(&sinfo->frags[i]);
+
+		__xdp_return(page_address(page), &xdp->rxq->mem, true, xdp);
+	}
+out:
 	__xdp_return(xdp->data, &xdp->rxq->mem, true, xdp);
 }
+EXPORT_SYMBOL_GPL(xdp_return_buff);
 
 /* Only called for MEM_TYPE_PAGE_POOL see xdp.h */
 void __xdp_release_frame(void *data, struct xdp_mem_info *mem)
@@ -562,8 +617,14 @@ struct sk_buff *__xdp_build_skb_from_frame(struct xdp_frame *xdpf,
 					   struct sk_buff *skb,
 					   struct net_device *dev)
 {
+	struct skb_shared_info *sinfo = xdp_get_shared_info_from_frame(xdpf);
 	unsigned int headroom, frame_size;
 	void *hard_start;
+	u8 nr_frags;
+
+	/* xdp frags frame */
+	if (unlikely(xdp_frame_has_frags(xdpf)))
+		nr_frags = sinfo->nr_frags;
 
 	/* Part of headroom was reserved to xdpf */
 	headroom = sizeof(*xdpf) + xdpf->headroom;
@@ -583,6 +644,12 @@ struct sk_buff *__xdp_build_skb_from_frame(struct xdp_frame *xdpf,
 	if (xdpf->metasize)
 		skb_metadata_set(skb, xdpf->metasize);
 
+	if (unlikely(xdp_frame_has_frags(xdpf)))
+		xdp_update_skb_shared_info(skb, nr_frags,
+					   sinfo->xdp_frags_size,
+					   nr_frags * xdpf->frame_sz,
+					   xdp_frame_is_frag_pfmemalloc(xdpf));
+
 	/* Essential SKB info: protocol and skb->dev */
 	skb->protocol = eth_type_trans(skb, dev);
 
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index 5183e627468d..671c377f0889 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -136,11 +136,6 @@ static inline int between48(const u64 seq1, const u64 seq2, const u64 seq3)
 	return (seq3 << 16) - (seq2 << 16) >= (seq1 << 16) - (seq2 << 16);
 }
 
-static inline u64 max48(const u64 seq1, const u64 seq2)
-{
-	return after48(seq1, seq2) ? seq1 : seq2;
-}
-
 /**
  * dccp_loss_count - Approximate the number of lost data packets in a burst loss
  * @s1:  last known sequence number before the loss ('hole')
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index 0ea29270d7e5..ae662567a6cb 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -1030,15 +1030,9 @@ static void __net_exit dccp_v4_exit_net(struct net *net)
 	inet_ctl_sock_destroy(pn->v4_ctl_sk);
 }
 
-static void __net_exit dccp_v4_exit_batch(struct list_head *net_exit_list)
-{
-	inet_twsk_purge(&dccp_hashinfo, AF_INET);
-}
-
 static struct pernet_operations dccp_v4_ops = {
 	.init	= dccp_v4_init_net,
 	.exit	= dccp_v4_exit_net,
-	.exit_batch = dccp_v4_exit_batch,
 	.id	= &dccp_v4_pernet_id,
 	.size   = sizeof(struct dccp_v4_pernet),
 };
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index fa663518fa0e..eab3bd1ee9a0 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -1115,15 +1115,9 @@ static void __net_exit dccp_v6_exit_net(struct net *net)
 	inet_ctl_sock_destroy(pn->v6_ctl_sk);
 }
 
-static void __net_exit dccp_v6_exit_batch(struct list_head *net_exit_list)
-{
-	inet_twsk_purge(&dccp_hashinfo, AF_INET6);
-}
-
 static struct pernet_operations dccp_v6_ops = {
 	.init   = dccp_v6_init_net,
 	.exit   = dccp_v6_exit_net,
-	.exit_batch = dccp_v6_exit_batch,
 	.id	= &dccp_v6_pernet_id,
 	.size   = sizeof(struct dccp_v6_pernet),
 };
diff --git a/net/dccp/minisocks.c b/net/dccp/minisocks.c
index 91e7a2202697..64d805b27add 100644
--- a/net/dccp/minisocks.c
+++ b/net/dccp/minisocks.c
@@ -22,6 +22,7 @@
 #include "feat.h"
 
 struct inet_timewait_death_row dccp_death_row = {
+	.tw_refcount = REFCOUNT_INIT(1),
 	.sysctl_max_tw_buckets = NR_FILE * 2,
 	.hashinfo	= &dccp_hashinfo,
 };
diff --git a/net/decnet/dn_nsp_out.c b/net/decnet/dn_nsp_out.c
index eadc89583168..b05639bdfc8f 100644
--- a/net/decnet/dn_nsp_out.c
+++ b/net/decnet/dn_nsp_out.c
@@ -52,6 +52,7 @@
 #include <linux/init.h>
 #include <linux/poll.h>
 #include <linux/if_packet.h>
+#include <linux/jiffies.h>
 #include <net/neighbour.h>
 #include <net/dst.h>
 #include <net/flow.h>
@@ -351,7 +352,7 @@ void dn_nsp_queue_xmit(struct sock *sk, struct sk_buff *skb,
 	 * Slow start: If we have been idle for more than
 	 * one RTT, then reset window to min size.
 	 */
-	if ((jiffies - scp->stamp) > t)
+	if (time_is_before_jiffies(scp->stamp + t))
 		scp->snd_window = NSP_MIN_WINDOW;
 
 	if (oth)
diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index c43f7446a75d..89c6c86e746f 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -467,6 +467,106 @@ struct dsa_port *dsa_port_from_netdev(struct net_device *netdev)
 }
 EXPORT_SYMBOL_GPL(dsa_port_from_netdev);
 
+int dsa_port_walk_fdbs(struct dsa_switch *ds, int port, dsa_fdb_walk_cb_t cb)
+{
+	struct dsa_port *dp = dsa_to_port(ds, port);
+	struct dsa_mac_addr *a;
+	int err = 0;
+
+	mutex_lock(&dp->addr_lists_lock);
+
+	list_for_each_entry(a, &dp->fdbs, list) {
+		err = cb(ds, port, a->addr, a->vid, a->db);
+		if (err)
+			break;
+	}
+
+	mutex_unlock(&dp->addr_lists_lock);
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(dsa_port_walk_fdbs);
+
+int dsa_port_walk_mdbs(struct dsa_switch *ds, int port, dsa_fdb_walk_cb_t cb)
+{
+	struct dsa_port *dp = dsa_to_port(ds, port);
+	struct dsa_mac_addr *a;
+	int err = 0;
+
+	mutex_lock(&dp->addr_lists_lock);
+
+	list_for_each_entry(a, &dp->mdbs, list) {
+		err = cb(ds, port, a->addr, a->vid, a->db);
+		if (err)
+			break;
+	}
+
+	mutex_unlock(&dp->addr_lists_lock);
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(dsa_port_walk_mdbs);
+
+bool dsa_db_equal(const struct dsa_db *a, const struct dsa_db *b)
+{
+	if (a->type != b->type)
+		return false;
+
+	switch (a->type) {
+	case DSA_DB_PORT:
+		return a->dp == b->dp;
+	case DSA_DB_LAG:
+		return a->lag.dev == b->lag.dev;
+	case DSA_DB_BRIDGE:
+		return a->bridge.num == b->bridge.num;
+	default:
+		WARN_ON(1);
+		return false;
+	}
+}
+
+bool dsa_fdb_present_in_other_db(struct dsa_switch *ds, int port,
+				 const unsigned char *addr, u16 vid,
+				 struct dsa_db db)
+{
+	struct dsa_port *dp = dsa_to_port(ds, port);
+	struct dsa_mac_addr *a;
+
+	lockdep_assert_held(&dp->addr_lists_lock);
+
+	list_for_each_entry(a, &dp->fdbs, list) {
+		if (!ether_addr_equal(a->addr, addr) || a->vid != vid)
+			continue;
+
+		if (a->db.type == db.type && !dsa_db_equal(&a->db, &db))
+			return true;
+	}
+
+	return false;
+}
+EXPORT_SYMBOL_GPL(dsa_fdb_present_in_other_db);
+
+bool dsa_mdb_present_in_other_db(struct dsa_switch *ds, int port,
+				 const struct switchdev_obj_port_mdb *mdb,
+				 struct dsa_db db)
+{
+	struct dsa_port *dp = dsa_to_port(ds, port);
+	struct dsa_mac_addr *a;
+
+	lockdep_assert_held(&dp->addr_lists_lock);
+
+	list_for_each_entry(a, &dp->mdbs, list) {
+		if (!ether_addr_equal(a->addr, mdb->addr) || a->vid != mdb->vid)
+			continue;
+
+		if (a->db.type == db.type && !dsa_db_equal(&a->db, &db))
+			return true;
+	}
+
+	return false;
+}
+EXPORT_SYMBOL_GPL(dsa_mdb_present_in_other_db);
+
 static int __init dsa_init_module(void)
 {
 	int rc;
diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index 88e2808019b4..ca6af86964bc 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -15,6 +15,7 @@
 #include <linux/of.h>
 #include <linux/of_net.h>
 #include <net/devlink.h>
+#include <net/sch_generic.h>
 
 #include "dsa_priv.h"
 
@@ -71,27 +72,24 @@ int dsa_broadcast(unsigned long e, void *v)
 }
 
 /**
- * dsa_lag_map() - Map LAG netdev to a linear LAG ID
+ * dsa_lag_map() - Map LAG structure to a linear LAG array
  * @dst: Tree in which to record the mapping.
- * @lag: Netdev that is to be mapped to an ID.
+ * @lag: LAG structure that is to be mapped to the tree's array.
  *
- * dsa_lag_id/dsa_lag_dev can then be used to translate between the
+ * dsa_lag_id/dsa_lag_by_id can then be used to translate between the
  * two spaces. The size of the mapping space is determined by the
  * driver by setting ds->num_lag_ids. It is perfectly legal to leave
  * it unset if it is not needed, in which case these functions become
  * no-ops.
  */
-void dsa_lag_map(struct dsa_switch_tree *dst, struct net_device *lag)
+void dsa_lag_map(struct dsa_switch_tree *dst, struct dsa_lag *lag)
 {
 	unsigned int id;
 
-	if (dsa_lag_id(dst, lag) >= 0)
-		/* Already mapped */
-		return;
-
-	for (id = 0; id < dst->lags_len; id++) {
-		if (!dsa_lag_dev(dst, id)) {
-			dst->lags[id] = lag;
+	for (id = 1; id <= dst->lags_len; id++) {
+		if (!dsa_lag_by_id(dst, id)) {
+			dst->lags[id - 1] = lag;
+			lag->id = id;
 			return;
 		}
 	}
@@ -107,28 +105,36 @@ void dsa_lag_map(struct dsa_switch_tree *dst, struct net_device *lag)
 /**
  * dsa_lag_unmap() - Remove a LAG ID mapping
  * @dst: Tree in which the mapping is recorded.
- * @lag: Netdev that was mapped.
+ * @lag: LAG structure that was mapped.
  *
  * As there may be multiple users of the mapping, it is only removed
  * if there are no other references to it.
  */
-void dsa_lag_unmap(struct dsa_switch_tree *dst, struct net_device *lag)
+void dsa_lag_unmap(struct dsa_switch_tree *dst, struct dsa_lag *lag)
 {
-	struct dsa_port *dp;
 	unsigned int id;
 
-	dsa_lag_foreach_port(dp, dst, lag)
-		/* There are remaining users of this mapping */
-		return;
-
 	dsa_lags_foreach_id(id, dst) {
-		if (dsa_lag_dev(dst, id) == lag) {
-			dst->lags[id] = NULL;
+		if (dsa_lag_by_id(dst, id) == lag) {
+			dst->lags[id - 1] = NULL;
+			lag->id = 0;
 			break;
 		}
 	}
 }
 
+struct dsa_lag *dsa_tree_lag_find(struct dsa_switch_tree *dst,
+				  const struct net_device *lag_dev)
+{
+	struct dsa_port *dp;
+
+	list_for_each_entry(dp, &dst->ports, list)
+		if (dsa_port_lag_dev_get(dp) == lag_dev)
+			return dp->lag;
+
+	return NULL;
+}
+
 struct dsa_bridge *dsa_tree_bridge_find(struct dsa_switch_tree *dst,
 					const struct net_device *br)
 {
@@ -451,10 +457,6 @@ static int dsa_port_setup(struct dsa_port *dp)
 	if (dp->setup)
 		return 0;
 
-	mutex_init(&dp->addr_lists_lock);
-	INIT_LIST_HEAD(&dp->fdbs);
-	INIT_LIST_HEAD(&dp->mdbs);
-
 	if (ds->ops->port_setup) {
 		err = ds->ops->port_setup(ds, dp->index);
 		if (err)
@@ -560,7 +562,6 @@ static void dsa_port_teardown(struct dsa_port *dp)
 {
 	struct devlink_port *dlp = &dp->devlink_port;
 	struct dsa_switch *ds = dp->ds;
-	struct dsa_mac_addr *a, *tmp;
 	struct net_device *slave;
 
 	if (!dp->setup)
@@ -592,16 +593,6 @@ static void dsa_port_teardown(struct dsa_port *dp)
 		break;
 	}
 
-	list_for_each_entry_safe(a, tmp, &dp->fdbs, list) {
-		list_del(&a->list);
-		kfree(a);
-	}
-
-	list_for_each_entry_safe(a, tmp, &dp->mdbs, list) {
-		list_del(&a->list);
-		kfree(a);
-	}
-
 	dp->setup = false;
 }
 
@@ -1064,9 +1055,18 @@ static int dsa_tree_setup_master(struct dsa_switch_tree *dst)
 
 	list_for_each_entry(dp, &dst->ports, list) {
 		if (dsa_port_is_cpu(dp)) {
-			err = dsa_master_setup(dp->master, dp);
+			struct net_device *master = dp->master;
+			bool admin_up = (master->flags & IFF_UP) &&
+					!qdisc_tx_is_noop(master);
+
+			err = dsa_master_setup(master, dp);
 			if (err)
 				break;
+
+			/* Replay master state event */
+			dsa_tree_master_admin_state_change(dst, master, admin_up);
+			dsa_tree_master_oper_state_change(dst, master,
+							  netif_oper_up(master));
 		}
 	}
 
@@ -1081,9 +1081,19 @@ static void dsa_tree_teardown_master(struct dsa_switch_tree *dst)
 
 	rtnl_lock();
 
-	list_for_each_entry(dp, &dst->ports, list)
-		if (dsa_port_is_cpu(dp))
-			dsa_master_teardown(dp->master);
+	list_for_each_entry(dp, &dst->ports, list) {
+		if (dsa_port_is_cpu(dp)) {
+			struct net_device *master = dp->master;
+
+			/* Synthesizing an "admin down" state is sufficient for
+			 * the switches to get a notification if the master is
+			 * currently up and running.
+			 */
+			dsa_tree_master_admin_state_change(dst, master, false);
+
+			dsa_master_teardown(master);
+		}
+	}
 
 	rtnl_unlock();
 }
@@ -1279,6 +1289,52 @@ out_unlock:
 	return err;
 }
 
+static void dsa_tree_master_state_change(struct dsa_switch_tree *dst,
+					 struct net_device *master)
+{
+	struct dsa_notifier_master_state_info info;
+	struct dsa_port *cpu_dp = master->dsa_ptr;
+
+	info.master = master;
+	info.operational = dsa_port_master_is_operational(cpu_dp);
+
+	dsa_tree_notify(dst, DSA_NOTIFIER_MASTER_STATE_CHANGE, &info);
+}
+
+void dsa_tree_master_admin_state_change(struct dsa_switch_tree *dst,
+					struct net_device *master,
+					bool up)
+{
+	struct dsa_port *cpu_dp = master->dsa_ptr;
+	bool notify = false;
+
+	if ((dsa_port_master_is_operational(cpu_dp)) !=
+	    (up && cpu_dp->master_oper_up))
+		notify = true;
+
+	cpu_dp->master_admin_up = up;
+
+	if (notify)
+		dsa_tree_master_state_change(dst, master);
+}
+
+void dsa_tree_master_oper_state_change(struct dsa_switch_tree *dst,
+				       struct net_device *master,
+				       bool up)
+{
+	struct dsa_port *cpu_dp = master->dsa_ptr;
+	bool notify = false;
+
+	if ((dsa_port_master_is_operational(cpu_dp)) !=
+	    (cpu_dp->master_admin_up && up))
+		notify = true;
+
+	cpu_dp->master_oper_up = up;
+
+	if (notify)
+		dsa_tree_master_state_change(dst, master);
+}
+
 static struct dsa_port *dsa_port_touch(struct dsa_switch *ds, int index)
 {
 	struct dsa_switch_tree *dst = ds->dst;
@@ -1295,6 +1351,11 @@ static struct dsa_port *dsa_port_touch(struct dsa_switch *ds, int index)
 	dp->ds = ds;
 	dp->index = index;
 
+	mutex_init(&dp->addr_lists_lock);
+	mutex_init(&dp->vlans_lock);
+	INIT_LIST_HEAD(&dp->fdbs);
+	INIT_LIST_HEAD(&dp->mdbs);
+	INIT_LIST_HEAD(&dp->vlans);
 	INIT_LIST_HEAD(&dp->list);
 	list_add_tail(&dp->list, &dst->ports);
 
@@ -1634,6 +1695,9 @@ static void dsa_switch_release_ports(struct dsa_switch *ds)
 	struct dsa_port *dp, *next;
 
 	dsa_switch_for_each_port_safe(dp, next, ds) {
+		WARN_ON(!list_empty(&dp->fdbs));
+		WARN_ON(!list_empty(&dp->mdbs));
+		WARN_ON(!list_empty(&dp->vlans));
 		list_del(&dp->list);
 		kfree(dp);
 	}
@@ -1722,6 +1786,10 @@ void dsa_switch_shutdown(struct dsa_switch *ds)
 	struct dsa_port *dp;
 
 	mutex_lock(&dsa2_mutex);
+
+	if (!ds->setup)
+		goto out;
+
 	rtnl_lock();
 
 	dsa_switch_for_each_user_port(dp, ds) {
@@ -1738,6 +1806,7 @@ void dsa_switch_shutdown(struct dsa_switch *ds)
 		dp->master->dsa_ptr = NULL;
 
 	rtnl_unlock();
+out:
 	mutex_unlock(&dsa2_mutex);
 }
 EXPORT_SYMBOL_GPL(dsa_switch_shutdown);
diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h
index 23c79e91ac67..5d3f4a67dce1 100644
--- a/net/dsa/dsa_priv.h
+++ b/net/dsa/dsa_priv.h
@@ -25,6 +25,8 @@ enum {
 	DSA_NOTIFIER_FDB_DEL,
 	DSA_NOTIFIER_HOST_FDB_ADD,
 	DSA_NOTIFIER_HOST_FDB_DEL,
+	DSA_NOTIFIER_LAG_FDB_ADD,
+	DSA_NOTIFIER_LAG_FDB_DEL,
 	DSA_NOTIFIER_LAG_CHANGE,
 	DSA_NOTIFIER_LAG_JOIN,
 	DSA_NOTIFIER_LAG_LEAVE,
@@ -34,12 +36,15 @@ enum {
 	DSA_NOTIFIER_HOST_MDB_DEL,
 	DSA_NOTIFIER_VLAN_ADD,
 	DSA_NOTIFIER_VLAN_DEL,
+	DSA_NOTIFIER_HOST_VLAN_ADD,
+	DSA_NOTIFIER_HOST_VLAN_DEL,
 	DSA_NOTIFIER_MTU,
 	DSA_NOTIFIER_TAG_PROTO,
 	DSA_NOTIFIER_TAG_PROTO_CONNECT,
 	DSA_NOTIFIER_TAG_PROTO_DISCONNECT,
 	DSA_NOTIFIER_TAG_8021Q_VLAN_ADD,
 	DSA_NOTIFIER_TAG_8021Q_VLAN_DEL,
+	DSA_NOTIFIER_MASTER_STATE_CHANGE,
 };
 
 /* DSA_NOTIFIER_AGEING_TIME */
@@ -54,6 +59,7 @@ struct dsa_notifier_bridge_info {
 	int sw_index;
 	int port;
 	bool tx_fwd_offload;
+	struct netlink_ext_ack *extack;
 };
 
 /* DSA_NOTIFIER_FDB_* */
@@ -62,6 +68,15 @@ struct dsa_notifier_fdb_info {
 	int port;
 	const unsigned char *addr;
 	u16 vid;
+	struct dsa_db db;
+};
+
+/* DSA_NOTIFIER_LAG_FDB_* */
+struct dsa_notifier_lag_fdb_info {
+	struct dsa_lag *lag;
+	const unsigned char *addr;
+	u16 vid;
+	struct dsa_db db;
 };
 
 /* DSA_NOTIFIER_MDB_* */
@@ -69,11 +84,12 @@ struct dsa_notifier_mdb_info {
 	const struct switchdev_obj_port_mdb *mdb;
 	int sw_index;
 	int port;
+	struct dsa_db db;
 };
 
 /* DSA_NOTIFIER_LAG_* */
 struct dsa_notifier_lag_info {
-	struct net_device *lag;
+	struct dsa_lag lag;
 	int sw_index;
 	int port;
 
@@ -109,10 +125,15 @@ struct dsa_notifier_tag_8021q_vlan_info {
 	u16 vid;
 };
 
+/* DSA_NOTIFIER_MASTER_STATE_CHANGE */
+struct dsa_notifier_master_state_info {
+	const struct net_device *master;
+	bool operational;
+};
+
 struct dsa_switchdev_event_work {
-	struct dsa_switch *ds;
-	int port;
 	struct net_device *dev;
+	struct net_device *orig_dev;
 	struct work_struct work;
 	unsigned long event;
 	/* Specific for SWITCHDEV_FDB_ADD_TO_DEVICE and
@@ -123,6 +144,21 @@ struct dsa_switchdev_event_work {
 	bool host_addr;
 };
 
+enum dsa_standalone_event {
+	DSA_UC_ADD,
+	DSA_UC_DEL,
+	DSA_MC_ADD,
+	DSA_MC_DEL,
+};
+
+struct dsa_standalone_event_work {
+	struct work_struct work;
+	struct net_device *dev;
+	enum dsa_standalone_event event;
+	unsigned char addr[ETH_ALEN];
+	u16 vid;
+};
+
 struct dsa_slave_priv {
 	/* Copy of CPU port xmit for faster access in slave transmit hot path */
 	struct sk_buff *	(*xmit)(struct sk_buff *skb,
@@ -146,6 +182,8 @@ const struct dsa_device_ops *dsa_tag_driver_get(int tag_protocol);
 void dsa_tag_driver_put(const struct dsa_device_ops *ops);
 const struct dsa_device_ops *dsa_find_tagger_by_name(const char *buf);
 
+bool dsa_db_equal(const struct dsa_db *a, const struct dsa_db *b);
+
 bool dsa_schedule_work(struct work_struct *work);
 const char *dsa_tag_protocol_to_str(const struct dsa_device_ops *ops);
 
@@ -177,6 +215,9 @@ static inline struct net_device *dsa_master_find_slave(struct net_device *dev,
 void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp,
 			       const struct dsa_device_ops *tag_ops);
 int dsa_port_set_state(struct dsa_port *dp, u8 state, bool do_fast_age);
+int dsa_port_set_mst_state(struct dsa_port *dp,
+			   const struct switchdev_mst_state *state,
+			   struct netlink_ext_ack *extack);
 int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy);
 int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy);
 void dsa_port_disable_rt(struct dsa_port *dp);
@@ -196,25 +237,41 @@ int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
 			    struct netlink_ext_ack *extack);
 bool dsa_port_skip_vlan_configuration(struct dsa_port *dp);
 int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock);
+int dsa_port_mst_enable(struct dsa_port *dp, bool on,
+			struct netlink_ext_ack *extack);
+int dsa_port_vlan_msti(struct dsa_port *dp,
+		       const struct switchdev_vlan_msti *msti);
 int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu,
 			bool targeted_match);
 int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
 		     u16 vid);
 int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr,
 		     u16 vid);
-int dsa_port_host_fdb_add(struct dsa_port *dp, const unsigned char *addr,
-			  u16 vid);
-int dsa_port_host_fdb_del(struct dsa_port *dp, const unsigned char *addr,
-			  u16 vid);
+int dsa_port_standalone_host_fdb_add(struct dsa_port *dp,
+				     const unsigned char *addr, u16 vid);
+int dsa_port_standalone_host_fdb_del(struct dsa_port *dp,
+				     const unsigned char *addr, u16 vid);
+int dsa_port_bridge_host_fdb_add(struct dsa_port *dp, const unsigned char *addr,
+				 u16 vid);
+int dsa_port_bridge_host_fdb_del(struct dsa_port *dp, const unsigned char *addr,
+				 u16 vid);
+int dsa_port_lag_fdb_add(struct dsa_port *dp, const unsigned char *addr,
+			 u16 vid);
+int dsa_port_lag_fdb_del(struct dsa_port *dp, const unsigned char *addr,
+			 u16 vid);
 int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data);
 int dsa_port_mdb_add(const struct dsa_port *dp,
 		     const struct switchdev_obj_port_mdb *mdb);
 int dsa_port_mdb_del(const struct dsa_port *dp,
 		     const struct switchdev_obj_port_mdb *mdb);
-int dsa_port_host_mdb_add(const struct dsa_port *dp,
-			  const struct switchdev_obj_port_mdb *mdb);
-int dsa_port_host_mdb_del(const struct dsa_port *dp,
-			  const struct switchdev_obj_port_mdb *mdb);
+int dsa_port_standalone_host_mdb_add(const struct dsa_port *dp,
+				     const struct switchdev_obj_port_mdb *mdb);
+int dsa_port_standalone_host_mdb_del(const struct dsa_port *dp,
+				     const struct switchdev_obj_port_mdb *mdb);
+int dsa_port_bridge_host_mdb_add(const struct dsa_port *dp,
+				 const struct switchdev_obj_port_mdb *mdb);
+int dsa_port_bridge_host_mdb_del(const struct dsa_port *dp,
+				 const struct switchdev_obj_port_mdb *mdb);
 int dsa_port_pre_bridge_flags(const struct dsa_port *dp,
 			      struct switchdev_brport_flags flags,
 			      struct netlink_ext_ack *extack);
@@ -226,6 +283,11 @@ int dsa_port_vlan_add(struct dsa_port *dp,
 		      struct netlink_ext_ack *extack);
 int dsa_port_vlan_del(struct dsa_port *dp,
 		      const struct switchdev_obj_port_vlan *vlan);
+int dsa_port_host_vlan_add(struct dsa_port *dp,
+			   const struct switchdev_obj_port_vlan *vlan,
+			   struct netlink_ext_ack *extack);
+int dsa_port_host_vlan_del(struct dsa_port *dp,
+			   const struct switchdev_obj_port_vlan *vlan);
 int dsa_port_mrp_add(const struct dsa_port *dp,
 		     const struct switchdev_obj_mrp *mrp);
 int dsa_port_mrp_del(const struct dsa_port *dp,
@@ -472,15 +534,37 @@ static inline void *dsa_etype_header_pos_tx(struct sk_buff *skb)
 int dsa_switch_register_notifier(struct dsa_switch *ds);
 void dsa_switch_unregister_notifier(struct dsa_switch *ds);
 
+static inline bool dsa_switch_supports_uc_filtering(struct dsa_switch *ds)
+{
+	return ds->ops->port_fdb_add && ds->ops->port_fdb_del &&
+	       ds->fdb_isolation && !ds->vlan_filtering_is_global &&
+	       !ds->needs_standalone_vlan_filtering;
+}
+
+static inline bool dsa_switch_supports_mc_filtering(struct dsa_switch *ds)
+{
+	return ds->ops->port_mdb_add && ds->ops->port_mdb_del &&
+	       ds->fdb_isolation && !ds->vlan_filtering_is_global &&
+	       !ds->needs_standalone_vlan_filtering;
+}
+
 /* dsa2.c */
-void dsa_lag_map(struct dsa_switch_tree *dst, struct net_device *lag);
-void dsa_lag_unmap(struct dsa_switch_tree *dst, struct net_device *lag);
+void dsa_lag_map(struct dsa_switch_tree *dst, struct dsa_lag *lag);
+void dsa_lag_unmap(struct dsa_switch_tree *dst, struct dsa_lag *lag);
+struct dsa_lag *dsa_tree_lag_find(struct dsa_switch_tree *dst,
+				  const struct net_device *lag_dev);
 int dsa_tree_notify(struct dsa_switch_tree *dst, unsigned long e, void *v);
 int dsa_broadcast(unsigned long e, void *v);
 int dsa_tree_change_tag_proto(struct dsa_switch_tree *dst,
 			      struct net_device *master,
 			      const struct dsa_device_ops *tag_ops,
 			      const struct dsa_device_ops *old_tag_ops);
+void dsa_tree_master_admin_state_change(struct dsa_switch_tree *dst,
+					struct net_device *master,
+					bool up);
+void dsa_tree_master_oper_state_change(struct dsa_switch_tree *dst,
+				       struct net_device *master,
+				       bool up);
 unsigned int dsa_bridge_num_get(const struct net_device *bridge_dev, int max);
 void dsa_bridge_num_put(const struct net_device *bridge_dev,
 			unsigned int bridge_num);
@@ -488,10 +572,6 @@ struct dsa_bridge *dsa_tree_bridge_find(struct dsa_switch_tree *dst,
 					const struct net_device *br);
 
 /* tag_8021q.c */
-int dsa_tag_8021q_bridge_join(struct dsa_switch *ds,
-			      struct dsa_notifier_bridge_info *info);
-int dsa_tag_8021q_bridge_leave(struct dsa_switch *ds,
-			       struct dsa_notifier_bridge_info *info);
 int dsa_switch_tag_8021q_vlan_add(struct dsa_switch *ds,
 				  struct dsa_notifier_tag_8021q_vlan_info *info);
 int dsa_switch_tag_8021q_vlan_del(struct dsa_switch *ds,
diff --git a/net/dsa/master.c b/net/dsa/master.c
index 880f910b23a9..991c2930d631 100644
--- a/net/dsa/master.c
+++ b/net/dsa/master.c
@@ -335,8 +335,6 @@ static const struct attribute_group dsa_group = {
 	.attrs	= dsa_slave_attrs,
 };
 
-static struct lock_class_key dsa_master_addr_list_lock_key;
-
 int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp)
 {
 	struct dsa_switch *ds = cpu_dp->ds;
@@ -358,8 +356,6 @@ int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp)
 	wmb();
 
 	dev->dsa_ptr = cpu_dp;
-	lockdep_set_class(&dev->addr_list_lock,
-			  &dsa_master_addr_list_lock_key);
 
 	dsa_master_set_promiscuity(dev, 1);
 
diff --git a/net/dsa/port.c b/net/dsa/port.c
index 1a40c52f5a42..32d472a82241 100644
--- a/net/dsa/port.c
+++ b/net/dsa/port.c
@@ -30,12 +30,11 @@ static int dsa_port_notify(const struct dsa_port *dp, unsigned long e, void *v)
 	return dsa_tree_notify(dp->ds->dst, e, v);
 }
 
-static void dsa_port_notify_bridge_fdb_flush(const struct dsa_port *dp)
+static void dsa_port_notify_bridge_fdb_flush(const struct dsa_port *dp, u16 vid)
 {
 	struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
 	struct switchdev_notifier_fdb_info info = {
-		/* flush all VLANs */
-		.vid = 0,
+		.vid = vid,
 	};
 
 	/* When the port becomes standalone it has already left the bridge.
@@ -57,7 +56,42 @@ static void dsa_port_fast_age(const struct dsa_port *dp)
 
 	ds->ops->port_fast_age(ds, dp->index);
 
-	dsa_port_notify_bridge_fdb_flush(dp);
+	/* flush all VLANs */
+	dsa_port_notify_bridge_fdb_flush(dp, 0);
+}
+
+static int dsa_port_vlan_fast_age(const struct dsa_port *dp, u16 vid)
+{
+	struct dsa_switch *ds = dp->ds;
+	int err;
+
+	if (!ds->ops->port_vlan_fast_age)
+		return -EOPNOTSUPP;
+
+	err = ds->ops->port_vlan_fast_age(ds, dp->index, vid);
+
+	if (!err)
+		dsa_port_notify_bridge_fdb_flush(dp, vid);
+
+	return err;
+}
+
+static int dsa_port_msti_fast_age(const struct dsa_port *dp, u16 msti)
+{
+	DECLARE_BITMAP(vids, VLAN_N_VID) = { 0 };
+	int err, vid;
+
+	err = br_mst_get_info(dsa_port_bridge_dev_get(dp), msti, vids);
+	if (err)
+		return err;
+
+	for_each_set_bit(vid, vids, VLAN_N_VID) {
+		err = dsa_port_vlan_fast_age(dp, vid);
+		if (err)
+			return err;
+	}
+
+	return 0;
 }
 
 static bool dsa_port_can_configure_learning(struct dsa_port *dp)
@@ -118,6 +152,42 @@ static void dsa_port_set_state_now(struct dsa_port *dp, u8 state,
 		pr_err("DSA: failed to set STP state %u (%d)\n", state, err);
 }
 
+int dsa_port_set_mst_state(struct dsa_port *dp,
+			   const struct switchdev_mst_state *state,
+			   struct netlink_ext_ack *extack)
+{
+	struct dsa_switch *ds = dp->ds;
+	u8 prev_state;
+	int err;
+
+	if (!ds->ops->port_mst_state_set)
+		return -EOPNOTSUPP;
+
+	err = br_mst_get_state(dsa_port_to_bridge_port(dp), state->msti,
+			       &prev_state);
+	if (err)
+		return err;
+
+	err = ds->ops->port_mst_state_set(ds, dp->index, state);
+	if (err)
+		return err;
+
+	if (!(dp->learning &&
+	      (prev_state == BR_STATE_LEARNING ||
+	       prev_state == BR_STATE_FORWARDING) &&
+	      (state->state == BR_STATE_DISABLED ||
+	       state->state == BR_STATE_BLOCKING ||
+	       state->state == BR_STATE_LISTENING)))
+		return 0;
+
+	err = dsa_port_msti_fast_age(dp, state->msti);
+	if (err)
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Unable to flush associated VLANs");
+
+	return 0;
+}
+
 int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy)
 {
 	struct dsa_switch *ds = dp->ds;
@@ -176,7 +246,7 @@ static int dsa_port_inherit_brport_flags(struct dsa_port *dp,
 					 struct netlink_ext_ack *extack)
 {
 	const unsigned long mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
-				   BR_BCAST_FLOOD;
+				   BR_BCAST_FLOOD | BR_PORT_LOCKED;
 	struct net_device *brport_dev = dsa_port_to_bridge_port(dp);
 	int flag, err;
 
@@ -200,7 +270,7 @@ static void dsa_port_clear_brport_flags(struct dsa_port *dp)
 {
 	const unsigned long val = BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD;
 	const unsigned long mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
-				   BR_BCAST_FLOOD;
+				   BR_BCAST_FLOOD | BR_PORT_LOCKED;
 	int flag, err;
 
 	for_each_set_bit(flag, &mask, 32) {
@@ -321,6 +391,16 @@ static void dsa_port_bridge_destroy(struct dsa_port *dp,
 	kfree(bridge);
 }
 
+static bool dsa_port_supports_mst(struct dsa_port *dp)
+{
+	struct dsa_switch *ds = dp->ds;
+
+	return ds->ops->vlan_msti_set &&
+		ds->ops->port_mst_state_set &&
+		ds->ops->port_vlan_fast_age &&
+		dsa_port_can_configure_learning(dp);
+}
+
 int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br,
 			 struct netlink_ext_ack *extack)
 {
@@ -328,11 +408,15 @@ int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br,
 		.tree_index = dp->ds->dst->index,
 		.sw_index = dp->ds->index,
 		.port = dp->index,
+		.extack = extack,
 	};
 	struct net_device *dev = dp->slave;
 	struct net_device *brport_dev;
 	int err;
 
+	if (br_mst_enabled(br) && !dsa_port_supports_mst(dp))
+		return -EOPNOTSUPP;
+
 	/* Here the interface is already bridged. Reflect the current
 	 * configuration so that drivers can program their chips accordingly.
 	 */
@@ -429,7 +513,7 @@ int dsa_port_lag_change(struct dsa_port *dp,
 	};
 	bool tx_enabled;
 
-	if (!dp->lag_dev)
+	if (!dp->lag)
 		return 0;
 
 	/* On statically configured aggregates (e.g. loadbalance
@@ -447,27 +531,70 @@ int dsa_port_lag_change(struct dsa_port *dp,
 	return dsa_port_notify(dp, DSA_NOTIFIER_LAG_CHANGE, &info);
 }
 
-int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag,
+static int dsa_port_lag_create(struct dsa_port *dp,
+			       struct net_device *lag_dev)
+{
+	struct dsa_switch *ds = dp->ds;
+	struct dsa_lag *lag;
+
+	lag = dsa_tree_lag_find(ds->dst, lag_dev);
+	if (lag) {
+		refcount_inc(&lag->refcount);
+		dp->lag = lag;
+		return 0;
+	}
+
+	lag = kzalloc(sizeof(*lag), GFP_KERNEL);
+	if (!lag)
+		return -ENOMEM;
+
+	refcount_set(&lag->refcount, 1);
+	mutex_init(&lag->fdb_lock);
+	INIT_LIST_HEAD(&lag->fdbs);
+	lag->dev = lag_dev;
+	dsa_lag_map(ds->dst, lag);
+	dp->lag = lag;
+
+	return 0;
+}
+
+static void dsa_port_lag_destroy(struct dsa_port *dp)
+{
+	struct dsa_lag *lag = dp->lag;
+
+	dp->lag = NULL;
+	dp->lag_tx_enabled = false;
+
+	if (!refcount_dec_and_test(&lag->refcount))
+		return;
+
+	WARN_ON(!list_empty(&lag->fdbs));
+	dsa_lag_unmap(dp->ds->dst, lag);
+	kfree(lag);
+}
+
+int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag_dev,
 		      struct netdev_lag_upper_info *uinfo,
 		      struct netlink_ext_ack *extack)
 {
 	struct dsa_notifier_lag_info info = {
 		.sw_index = dp->ds->index,
 		.port = dp->index,
-		.lag = lag,
 		.info = uinfo,
 	};
 	struct net_device *bridge_dev;
 	int err;
 
-	dsa_lag_map(dp->ds->dst, lag);
-	dp->lag_dev = lag;
+	err = dsa_port_lag_create(dp, lag_dev);
+	if (err)
+		goto err_lag_create;
 
+	info.lag = *dp->lag;
 	err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_JOIN, &info);
 	if (err)
 		goto err_lag_join;
 
-	bridge_dev = netdev_master_upper_dev_get(lag);
+	bridge_dev = netdev_master_upper_dev_get(lag_dev);
 	if (!bridge_dev || !netif_is_bridge_master(bridge_dev))
 		return 0;
 
@@ -480,12 +607,12 @@ int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag,
 err_bridge_join:
 	dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info);
 err_lag_join:
-	dp->lag_dev = NULL;
-	dsa_lag_unmap(dp->ds->dst, lag);
+	dsa_port_lag_destroy(dp);
+err_lag_create:
 	return err;
 }
 
-void dsa_port_pre_lag_leave(struct dsa_port *dp, struct net_device *lag)
+void dsa_port_pre_lag_leave(struct dsa_port *dp, struct net_device *lag_dev)
 {
 	struct net_device *br = dsa_port_bridge_dev_get(dp);
 
@@ -493,17 +620,16 @@ void dsa_port_pre_lag_leave(struct dsa_port *dp, struct net_device *lag)
 		dsa_port_pre_bridge_leave(dp, br);
 }
 
-void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag)
+void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag_dev)
 {
 	struct net_device *br = dsa_port_bridge_dev_get(dp);
 	struct dsa_notifier_lag_info info = {
 		.sw_index = dp->ds->index,
 		.port = dp->index,
-		.lag = lag,
 	};
 	int err;
 
-	if (!dp->lag_dev)
+	if (!dp->lag)
 		return;
 
 	/* Port might have been part of a LAG that in turn was
@@ -512,16 +638,15 @@ void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag)
 	if (br)
 		dsa_port_bridge_leave(dp, br);
 
-	dp->lag_tx_enabled = false;
-	dp->lag_dev = NULL;
+	info.lag = *dp->lag;
+
+	dsa_port_lag_destroy(dp);
 
 	err = dsa_port_notify(dp, DSA_NOTIFIER_LAG_LEAVE, &info);
 	if (err)
 		dev_err(dp->ds->dev,
 			"port %d failed to notify DSA_NOTIFIER_LAG_LEAVE: %pe\n",
 			dp->index, ERR_PTR(err));
-
-	dsa_lag_unmap(dp->ds->dst, lag);
 }
 
 /* Must be called under rcu_read_lock() */
@@ -693,6 +818,17 @@ int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock)
 	return 0;
 }
 
+int dsa_port_mst_enable(struct dsa_port *dp, bool on,
+			struct netlink_ext_ack *extack)
+{
+	if (on && !dsa_port_supports_mst(dp)) {
+		NL_SET_ERR_MSG_MOD(extack, "Hardware does not support MST");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 int dsa_port_pre_bridge_flags(const struct dsa_port *dp,
 			      struct switchdev_brport_flags flags,
 			      struct netlink_ext_ack *extack)
@@ -736,6 +872,17 @@ int dsa_port_bridge_flags(struct dsa_port *dp,
 	return 0;
 }
 
+int dsa_port_vlan_msti(struct dsa_port *dp,
+		       const struct switchdev_vlan_msti *msti)
+{
+	struct dsa_switch *ds = dp->ds;
+
+	if (!ds->ops->vlan_msti_set)
+		return -EOPNOTSUPP;
+
+	return ds->ops->vlan_msti_set(ds, *dp->bridge, msti);
+}
+
 int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu,
 			bool targeted_match)
 {
@@ -757,8 +904,19 @@ int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
 		.port = dp->index,
 		.addr = addr,
 		.vid = vid,
+		.db = {
+			.type = DSA_DB_BRIDGE,
+			.bridge = *dp->bridge,
+		},
 	};
 
+	/* Refcounting takes bridge.num as a key, and should be global for all
+	 * bridges in the absence of FDB isolation, and per bridge otherwise.
+	 * Force the bridge.num to zero here in the absence of FDB isolation.
+	 */
+	if (!dp->ds->fdb_isolation)
+		info.db.bridge.num = 0;
+
 	return dsa_port_notify(dp, DSA_NOTIFIER_FDB_ADD, &info);
 }
 
@@ -770,22 +928,55 @@ int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr,
 		.port = dp->index,
 		.addr = addr,
 		.vid = vid,
-
+		.db = {
+			.type = DSA_DB_BRIDGE,
+			.bridge = *dp->bridge,
+		},
 	};
 
+	if (!dp->ds->fdb_isolation)
+		info.db.bridge.num = 0;
+
 	return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info);
 }
 
-int dsa_port_host_fdb_add(struct dsa_port *dp, const unsigned char *addr,
-			  u16 vid)
+static int dsa_port_host_fdb_add(struct dsa_port *dp,
+				 const unsigned char *addr, u16 vid,
+				 struct dsa_db db)
 {
 	struct dsa_notifier_fdb_info info = {
 		.sw_index = dp->ds->index,
 		.port = dp->index,
 		.addr = addr,
 		.vid = vid,
+		.db = db,
 	};
+
+	if (!dp->ds->fdb_isolation)
+		info.db.bridge.num = 0;
+
+	return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_ADD, &info);
+}
+
+int dsa_port_standalone_host_fdb_add(struct dsa_port *dp,
+				     const unsigned char *addr, u16 vid)
+{
+	struct dsa_db db = {
+		.type = DSA_DB_PORT,
+		.dp = dp,
+	};
+
+	return dsa_port_host_fdb_add(dp, addr, vid, db);
+}
+
+int dsa_port_bridge_host_fdb_add(struct dsa_port *dp,
+				 const unsigned char *addr, u16 vid)
+{
 	struct dsa_port *cpu_dp = dp->cpu_dp;
+	struct dsa_db db = {
+		.type = DSA_DB_BRIDGE,
+		.bridge = *dp->bridge,
+	};
 	int err;
 
 	/* Avoid a call to __dev_set_promiscuity() on the master, which
@@ -798,19 +989,46 @@ int dsa_port_host_fdb_add(struct dsa_port *dp, const unsigned char *addr,
 			return err;
 	}
 
-	return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_ADD, &info);
+	return dsa_port_host_fdb_add(dp, addr, vid, db);
 }
 
-int dsa_port_host_fdb_del(struct dsa_port *dp, const unsigned char *addr,
-			  u16 vid)
+static int dsa_port_host_fdb_del(struct dsa_port *dp,
+				 const unsigned char *addr, u16 vid,
+				 struct dsa_db db)
 {
 	struct dsa_notifier_fdb_info info = {
 		.sw_index = dp->ds->index,
 		.port = dp->index,
 		.addr = addr,
 		.vid = vid,
+		.db = db,
 	};
+
+	if (!dp->ds->fdb_isolation)
+		info.db.bridge.num = 0;
+
+	return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_DEL, &info);
+}
+
+int dsa_port_standalone_host_fdb_del(struct dsa_port *dp,
+				     const unsigned char *addr, u16 vid)
+{
+	struct dsa_db db = {
+		.type = DSA_DB_PORT,
+		.dp = dp,
+	};
+
+	return dsa_port_host_fdb_del(dp, addr, vid, db);
+}
+
+int dsa_port_bridge_host_fdb_del(struct dsa_port *dp,
+				 const unsigned char *addr, u16 vid)
+{
 	struct dsa_port *cpu_dp = dp->cpu_dp;
+	struct dsa_db db = {
+		.type = DSA_DB_BRIDGE,
+		.bridge = *dp->bridge,
+	};
 	int err;
 
 	if (cpu_dp->master->priv_flags & IFF_UNICAST_FLT) {
@@ -819,7 +1037,45 @@ int dsa_port_host_fdb_del(struct dsa_port *dp, const unsigned char *addr,
 			return err;
 	}
 
-	return dsa_port_notify(dp, DSA_NOTIFIER_HOST_FDB_DEL, &info);
+	return dsa_port_host_fdb_del(dp, addr, vid, db);
+}
+
+int dsa_port_lag_fdb_add(struct dsa_port *dp, const unsigned char *addr,
+			 u16 vid)
+{
+	struct dsa_notifier_lag_fdb_info info = {
+		.lag = dp->lag,
+		.addr = addr,
+		.vid = vid,
+		.db = {
+			.type = DSA_DB_BRIDGE,
+			.bridge = *dp->bridge,
+		},
+	};
+
+	if (!dp->ds->fdb_isolation)
+		info.db.bridge.num = 0;
+
+	return dsa_port_notify(dp, DSA_NOTIFIER_LAG_FDB_ADD, &info);
+}
+
+int dsa_port_lag_fdb_del(struct dsa_port *dp, const unsigned char *addr,
+			 u16 vid)
+{
+	struct dsa_notifier_lag_fdb_info info = {
+		.lag = dp->lag,
+		.addr = addr,
+		.vid = vid,
+		.db = {
+			.type = DSA_DB_BRIDGE,
+			.bridge = *dp->bridge,
+		},
+	};
+
+	if (!dp->ds->fdb_isolation)
+		info.db.bridge.num = 0;
+
+	return dsa_port_notify(dp, DSA_NOTIFIER_LAG_FDB_DEL, &info);
 }
 
 int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data)
@@ -840,8 +1096,15 @@ int dsa_port_mdb_add(const struct dsa_port *dp,
 		.sw_index = dp->ds->index,
 		.port = dp->index,
 		.mdb = mdb,
+		.db = {
+			.type = DSA_DB_BRIDGE,
+			.bridge = *dp->bridge,
+		},
 	};
 
+	if (!dp->ds->fdb_isolation)
+		info.db.bridge.num = 0;
+
 	return dsa_port_notify(dp, DSA_NOTIFIER_MDB_ADD, &info);
 }
 
@@ -852,45 +1115,106 @@ int dsa_port_mdb_del(const struct dsa_port *dp,
 		.sw_index = dp->ds->index,
 		.port = dp->index,
 		.mdb = mdb,
+		.db = {
+			.type = DSA_DB_BRIDGE,
+			.bridge = *dp->bridge,
+		},
 	};
 
+	if (!dp->ds->fdb_isolation)
+		info.db.bridge.num = 0;
+
 	return dsa_port_notify(dp, DSA_NOTIFIER_MDB_DEL, &info);
 }
 
-int dsa_port_host_mdb_add(const struct dsa_port *dp,
-			  const struct switchdev_obj_port_mdb *mdb)
+static int dsa_port_host_mdb_add(const struct dsa_port *dp,
+				 const struct switchdev_obj_port_mdb *mdb,
+				 struct dsa_db db)
 {
 	struct dsa_notifier_mdb_info info = {
 		.sw_index = dp->ds->index,
 		.port = dp->index,
 		.mdb = mdb,
+		.db = db,
 	};
+
+	if (!dp->ds->fdb_isolation)
+		info.db.bridge.num = 0;
+
+	return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_ADD, &info);
+}
+
+int dsa_port_standalone_host_mdb_add(const struct dsa_port *dp,
+				     const struct switchdev_obj_port_mdb *mdb)
+{
+	struct dsa_db db = {
+		.type = DSA_DB_PORT,
+		.dp = dp,
+	};
+
+	return dsa_port_host_mdb_add(dp, mdb, db);
+}
+
+int dsa_port_bridge_host_mdb_add(const struct dsa_port *dp,
+				 const struct switchdev_obj_port_mdb *mdb)
+{
 	struct dsa_port *cpu_dp = dp->cpu_dp;
+	struct dsa_db db = {
+		.type = DSA_DB_BRIDGE,
+		.bridge = *dp->bridge,
+	};
 	int err;
 
 	err = dev_mc_add(cpu_dp->master, mdb->addr);
 	if (err)
 		return err;
 
-	return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_ADD, &info);
+	return dsa_port_host_mdb_add(dp, mdb, db);
 }
 
-int dsa_port_host_mdb_del(const struct dsa_port *dp,
-			  const struct switchdev_obj_port_mdb *mdb)
+static int dsa_port_host_mdb_del(const struct dsa_port *dp,
+				 const struct switchdev_obj_port_mdb *mdb,
+				 struct dsa_db db)
 {
 	struct dsa_notifier_mdb_info info = {
 		.sw_index = dp->ds->index,
 		.port = dp->index,
 		.mdb = mdb,
+		.db = db,
 	};
+
+	if (!dp->ds->fdb_isolation)
+		info.db.bridge.num = 0;
+
+	return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_DEL, &info);
+}
+
+int dsa_port_standalone_host_mdb_del(const struct dsa_port *dp,
+				     const struct switchdev_obj_port_mdb *mdb)
+{
+	struct dsa_db db = {
+		.type = DSA_DB_PORT,
+		.dp = dp,
+	};
+
+	return dsa_port_host_mdb_del(dp, mdb, db);
+}
+
+int dsa_port_bridge_host_mdb_del(const struct dsa_port *dp,
+				 const struct switchdev_obj_port_mdb *mdb)
+{
 	struct dsa_port *cpu_dp = dp->cpu_dp;
+	struct dsa_db db = {
+		.type = DSA_DB_BRIDGE,
+		.bridge = *dp->bridge,
+	};
 	int err;
 
 	err = dev_mc_del(cpu_dp->master, mdb->addr);
 	if (err)
 		return err;
 
-	return dsa_port_notify(dp, DSA_NOTIFIER_HOST_MDB_DEL, &info);
+	return dsa_port_host_mdb_del(dp, mdb, db);
 }
 
 int dsa_port_vlan_add(struct dsa_port *dp,
@@ -919,6 +1243,48 @@ int dsa_port_vlan_del(struct dsa_port *dp,
 	return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info);
 }
 
+int dsa_port_host_vlan_add(struct dsa_port *dp,
+			   const struct switchdev_obj_port_vlan *vlan,
+			   struct netlink_ext_ack *extack)
+{
+	struct dsa_notifier_vlan_info info = {
+		.sw_index = dp->ds->index,
+		.port = dp->index,
+		.vlan = vlan,
+		.extack = extack,
+	};
+	struct dsa_port *cpu_dp = dp->cpu_dp;
+	int err;
+
+	err = dsa_port_notify(dp, DSA_NOTIFIER_HOST_VLAN_ADD, &info);
+	if (err && err != -EOPNOTSUPP)
+		return err;
+
+	vlan_vid_add(cpu_dp->master, htons(ETH_P_8021Q), vlan->vid);
+
+	return err;
+}
+
+int dsa_port_host_vlan_del(struct dsa_port *dp,
+			   const struct switchdev_obj_port_vlan *vlan)
+{
+	struct dsa_notifier_vlan_info info = {
+		.sw_index = dp->ds->index,
+		.port = dp->index,
+		.vlan = vlan,
+	};
+	struct dsa_port *cpu_dp = dp->cpu_dp;
+	int err;
+
+	err = dsa_port_notify(dp, DSA_NOTIFIER_HOST_VLAN_DEL, &info);
+	if (err && err != -EOPNOTSUPP)
+		return err;
+
+	vlan_vid_del(cpu_dp->master, htons(ETH_P_8021Q), vlan->vid);
+
+	return err;
+}
+
 int dsa_port_mrp_add(const struct dsa_port *dp,
 		     const struct switchdev_obj_mrp *mrp)
 {
@@ -1026,6 +1392,20 @@ static void dsa_port_phylink_mac_pcs_get_state(struct phylink_config *config,
 	}
 }
 
+static struct phylink_pcs *
+dsa_port_phylink_mac_select_pcs(struct phylink_config *config,
+				phy_interface_t interface)
+{
+	struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
+	struct phylink_pcs *pcs = ERR_PTR(-EOPNOTSUPP);
+	struct dsa_switch *ds = dp->ds;
+
+	if (ds->ops->phylink_mac_select_pcs)
+		pcs = ds->ops->phylink_mac_select_pcs(ds, dp->index, interface);
+
+	return pcs;
+}
+
 static void dsa_port_phylink_mac_config(struct phylink_config *config,
 					unsigned int mode,
 					const struct phylink_link_state *state)
@@ -1092,6 +1472,7 @@ static void dsa_port_phylink_mac_link_up(struct phylink_config *config,
 
 static const struct phylink_mac_ops dsa_port_phylink_mac_ops = {
 	.validate = dsa_port_phylink_validate,
+	.mac_select_pcs = dsa_port_phylink_mac_select_pcs,
 	.mac_pcs_get_state = dsa_port_phylink_mac_pcs_get_state,
 	.mac_config = dsa_port_phylink_mac_config,
 	.mac_an_restart = dsa_port_phylink_mac_an_restart,
@@ -1209,7 +1590,6 @@ static int dsa_port_phylink_register(struct dsa_port *dp)
 
 	dp->pl_config.dev = ds->dev;
 	dp->pl_config.type = PHYLINK_DEV;
-	dp->pl_config.pcs_poll = ds->pcs_poll;
 
 	err = dsa_port_phylink_create(dp);
 	if (err)
@@ -1273,63 +1653,6 @@ void dsa_port_link_unregister_of(struct dsa_port *dp)
 		dsa_port_setup_phy_of(dp, false);
 }
 
-int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data)
-{
-	struct phy_device *phydev;
-	int ret = -EOPNOTSUPP;
-
-	if (of_phy_is_fixed_link(dp->dn))
-		return ret;
-
-	phydev = dsa_port_get_phy_device(dp);
-	if (IS_ERR_OR_NULL(phydev))
-		return ret;
-
-	ret = phy_ethtool_get_strings(phydev, data);
-	put_device(&phydev->mdio.dev);
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(dsa_port_get_phy_strings);
-
-int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data)
-{
-	struct phy_device *phydev;
-	int ret = -EOPNOTSUPP;
-
-	if (of_phy_is_fixed_link(dp->dn))
-		return ret;
-
-	phydev = dsa_port_get_phy_device(dp);
-	if (IS_ERR_OR_NULL(phydev))
-		return ret;
-
-	ret = phy_ethtool_get_stats(phydev, NULL, data);
-	put_device(&phydev->mdio.dev);
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(dsa_port_get_ethtool_phy_stats);
-
-int dsa_port_get_phy_sset_count(struct dsa_port *dp)
-{
-	struct phy_device *phydev;
-	int ret = -EOPNOTSUPP;
-
-	if (of_phy_is_fixed_link(dp->dn))
-		return ret;
-
-	phydev = dsa_port_get_phy_device(dp);
-	if (IS_ERR_OR_NULL(phydev))
-		return ret;
-
-	ret = phy_ethtool_get_sset_count(phydev);
-	put_device(&phydev->mdio.dev);
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(dsa_port_get_phy_sset_count);
-
 int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr)
 {
 	struct dsa_switch *ds = dp->ds;
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 22241afcac81..41c69a6e7854 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -19,10 +19,151 @@
 #include <net/tc_act/tc_mirred.h>
 #include <linux/if_bridge.h>
 #include <linux/if_hsr.h>
+#include <net/dcbnl.h>
 #include <linux/netpoll.h>
 
 #include "dsa_priv.h"
 
+static void dsa_slave_standalone_event_work(struct work_struct *work)
+{
+	struct dsa_standalone_event_work *standalone_work =
+		container_of(work, struct dsa_standalone_event_work, work);
+	const unsigned char *addr = standalone_work->addr;
+	struct net_device *dev = standalone_work->dev;
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct switchdev_obj_port_mdb mdb;
+	struct dsa_switch *ds = dp->ds;
+	u16 vid = standalone_work->vid;
+	int err;
+
+	switch (standalone_work->event) {
+	case DSA_UC_ADD:
+		err = dsa_port_standalone_host_fdb_add(dp, addr, vid);
+		if (err) {
+			dev_err(ds->dev,
+				"port %d failed to add %pM vid %d to fdb: %d\n",
+				dp->index, addr, vid, err);
+			break;
+		}
+		break;
+
+	case DSA_UC_DEL:
+		err = dsa_port_standalone_host_fdb_del(dp, addr, vid);
+		if (err) {
+			dev_err(ds->dev,
+				"port %d failed to delete %pM vid %d from fdb: %d\n",
+				dp->index, addr, vid, err);
+		}
+
+		break;
+	case DSA_MC_ADD:
+		ether_addr_copy(mdb.addr, addr);
+		mdb.vid = vid;
+
+		err = dsa_port_standalone_host_mdb_add(dp, &mdb);
+		if (err) {
+			dev_err(ds->dev,
+				"port %d failed to add %pM vid %d to mdb: %d\n",
+				dp->index, addr, vid, err);
+			break;
+		}
+		break;
+	case DSA_MC_DEL:
+		ether_addr_copy(mdb.addr, addr);
+		mdb.vid = vid;
+
+		err = dsa_port_standalone_host_mdb_del(dp, &mdb);
+		if (err) {
+			dev_err(ds->dev,
+				"port %d failed to delete %pM vid %d from mdb: %d\n",
+				dp->index, addr, vid, err);
+		}
+
+		break;
+	}
+
+	kfree(standalone_work);
+}
+
+static int dsa_slave_schedule_standalone_work(struct net_device *dev,
+					      enum dsa_standalone_event event,
+					      const unsigned char *addr,
+					      u16 vid)
+{
+	struct dsa_standalone_event_work *standalone_work;
+
+	standalone_work = kzalloc(sizeof(*standalone_work), GFP_ATOMIC);
+	if (!standalone_work)
+		return -ENOMEM;
+
+	INIT_WORK(&standalone_work->work, dsa_slave_standalone_event_work);
+	standalone_work->event = event;
+	standalone_work->dev = dev;
+
+	ether_addr_copy(standalone_work->addr, addr);
+	standalone_work->vid = vid;
+
+	dsa_schedule_work(&standalone_work->work);
+
+	return 0;
+}
+
+static int dsa_slave_sync_uc(struct net_device *dev,
+			     const unsigned char *addr)
+{
+	struct net_device *master = dsa_slave_to_master(dev);
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+
+	dev_uc_add(master, addr);
+
+	if (!dsa_switch_supports_uc_filtering(dp->ds))
+		return 0;
+
+	return dsa_slave_schedule_standalone_work(dev, DSA_UC_ADD, addr, 0);
+}
+
+static int dsa_slave_unsync_uc(struct net_device *dev,
+			       const unsigned char *addr)
+{
+	struct net_device *master = dsa_slave_to_master(dev);
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+
+	dev_uc_del(master, addr);
+
+	if (!dsa_switch_supports_uc_filtering(dp->ds))
+		return 0;
+
+	return dsa_slave_schedule_standalone_work(dev, DSA_UC_DEL, addr, 0);
+}
+
+static int dsa_slave_sync_mc(struct net_device *dev,
+			     const unsigned char *addr)
+{
+	struct net_device *master = dsa_slave_to_master(dev);
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+
+	dev_mc_add(master, addr);
+
+	if (!dsa_switch_supports_mc_filtering(dp->ds))
+		return 0;
+
+	return dsa_slave_schedule_standalone_work(dev, DSA_MC_ADD, addr, 0);
+}
+
+static int dsa_slave_unsync_mc(struct net_device *dev,
+			       const unsigned char *addr)
+{
+	struct net_device *master = dsa_slave_to_master(dev);
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+
+	dev_mc_del(master, addr);
+
+	if (!dsa_switch_supports_mc_filtering(dp->ds))
+		return 0;
+
+	return dsa_slave_schedule_standalone_work(dev, DSA_MC_DEL, addr, 0);
+}
+
 /* slave mii_bus handling ***************************************************/
 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
 {
@@ -67,6 +208,7 @@ static int dsa_slave_open(struct net_device *dev)
 {
 	struct net_device *master = dsa_slave_to_master(dev);
 	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
 	int err;
 
 	err = dev_open(master, NULL);
@@ -75,38 +217,30 @@ static int dsa_slave_open(struct net_device *dev)
 		goto out;
 	}
 
-	if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
-		err = dev_uc_add(master, dev->dev_addr);
-		if (err < 0)
+	if (dsa_switch_supports_uc_filtering(ds)) {
+		err = dsa_port_standalone_host_fdb_add(dp, dev->dev_addr, 0);
+		if (err)
 			goto out;
 	}
 
-	if (dev->flags & IFF_ALLMULTI) {
-		err = dev_set_allmulti(master, 1);
-		if (err < 0)
-			goto del_unicast;
-	}
-	if (dev->flags & IFF_PROMISC) {
-		err = dev_set_promiscuity(master, 1);
+	if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
+		err = dev_uc_add(master, dev->dev_addr);
 		if (err < 0)
-			goto clear_allmulti;
+			goto del_host_addr;
 	}
 
 	err = dsa_port_enable_rt(dp, dev->phydev);
 	if (err)
-		goto clear_promisc;
+		goto del_unicast;
 
 	return 0;
 
-clear_promisc:
-	if (dev->flags & IFF_PROMISC)
-		dev_set_promiscuity(master, -1);
-clear_allmulti:
-	if (dev->flags & IFF_ALLMULTI)
-		dev_set_allmulti(master, -1);
 del_unicast:
 	if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
 		dev_uc_del(master, dev->dev_addr);
+del_host_addr:
+	if (dsa_switch_supports_uc_filtering(ds))
+		dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0);
 out:
 	return err;
 }
@@ -115,68 +249,121 @@ static int dsa_slave_close(struct net_device *dev)
 {
 	struct net_device *master = dsa_slave_to_master(dev);
 	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
 
 	dsa_port_disable_rt(dp);
 
-	dev_mc_unsync(master, dev);
-	dev_uc_unsync(master, dev);
-	if (dev->flags & IFF_ALLMULTI)
-		dev_set_allmulti(master, -1);
-	if (dev->flags & IFF_PROMISC)
-		dev_set_promiscuity(master, -1);
-
 	if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
 		dev_uc_del(master, dev->dev_addr);
 
+	if (dsa_switch_supports_uc_filtering(ds))
+		dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0);
+
 	return 0;
 }
 
-static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
+/* Keep flooding enabled towards this port's CPU port as long as it serves at
+ * least one port in the tree that requires it.
+ */
+static void dsa_port_manage_cpu_flood(struct dsa_port *dp)
 {
-	struct net_device *master = dsa_slave_to_master(dev);
-	if (dev->flags & IFF_UP) {
-		if (change & IFF_ALLMULTI)
-			dev_set_allmulti(master,
-					 dev->flags & IFF_ALLMULTI ? 1 : -1);
-		if (change & IFF_PROMISC)
-			dev_set_promiscuity(master,
-					    dev->flags & IFF_PROMISC ? 1 : -1);
+	struct switchdev_brport_flags flags = {
+		.mask = BR_FLOOD | BR_MCAST_FLOOD,
+	};
+	struct dsa_switch_tree *dst = dp->ds->dst;
+	struct dsa_port *cpu_dp = dp->cpu_dp;
+	struct dsa_port *other_dp;
+	int err;
+
+	list_for_each_entry(other_dp, &dst->ports, list) {
+		if (!dsa_port_is_user(other_dp))
+			continue;
+
+		if (other_dp->cpu_dp != cpu_dp)
+			continue;
+
+		if (other_dp->slave->flags & IFF_ALLMULTI)
+			flags.val |= BR_MCAST_FLOOD;
+		if (other_dp->slave->flags & IFF_PROMISC)
+			flags.val |= BR_FLOOD;
 	}
+
+	err = dsa_port_pre_bridge_flags(dp, flags, NULL);
+	if (err)
+		return;
+
+	dsa_port_bridge_flags(cpu_dp, flags, NULL);
 }
 
-static void dsa_slave_set_rx_mode(struct net_device *dev)
+static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
 {
 	struct net_device *master = dsa_slave_to_master(dev);
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
+
+	if (change & IFF_ALLMULTI)
+		dev_set_allmulti(master,
+				 dev->flags & IFF_ALLMULTI ? 1 : -1);
+	if (change & IFF_PROMISC)
+		dev_set_promiscuity(master,
+				    dev->flags & IFF_PROMISC ? 1 : -1);
+
+	if (dsa_switch_supports_uc_filtering(ds) &&
+	    dsa_switch_supports_mc_filtering(ds))
+		dsa_port_manage_cpu_flood(dp);
+}
 
-	dev_mc_sync(master, dev);
-	dev_uc_sync(master, dev);
+static void dsa_slave_set_rx_mode(struct net_device *dev)
+{
+	__dev_mc_sync(dev, dsa_slave_sync_mc, dsa_slave_unsync_mc);
+	__dev_uc_sync(dev, dsa_slave_sync_uc, dsa_slave_unsync_uc);
 }
 
 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
 {
 	struct net_device *master = dsa_slave_to_master(dev);
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
 	struct sockaddr *addr = a;
 	int err;
 
 	if (!is_valid_ether_addr(addr->sa_data))
 		return -EADDRNOTAVAIL;
 
+	/* If the port is down, the address isn't synced yet to hardware or
+	 * to the DSA master, so there is nothing to change.
+	 */
 	if (!(dev->flags & IFF_UP))
-		goto out;
+		goto out_change_dev_addr;
+
+	if (dsa_switch_supports_uc_filtering(ds)) {
+		err = dsa_port_standalone_host_fdb_add(dp, addr->sa_data, 0);
+		if (err)
+			return err;
+	}
 
 	if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
 		err = dev_uc_add(master, addr->sa_data);
 		if (err < 0)
-			return err;
+			goto del_unicast;
 	}
 
 	if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
 		dev_uc_del(master, dev->dev_addr);
 
-out:
+	if (dsa_switch_supports_uc_filtering(ds))
+		dsa_port_standalone_host_fdb_del(dp, dev->dev_addr, 0);
+
+out_change_dev_addr:
 	eth_hw_addr_set(dev, addr->sa_data);
 
 	return 0;
+
+del_unicast:
+	if (dsa_switch_supports_uc_filtering(ds))
+		dsa_port_standalone_host_fdb_del(dp, addr->sa_data, 0);
+
+	return err;
 }
 
 struct dsa_slave_dump_ctx {
@@ -288,6 +475,12 @@ static int dsa_slave_port_attr_set(struct net_device *dev, const void *ctx,
 
 		ret = dsa_port_set_state(dp, attr->u.stp_state, true);
 		break;
+	case SWITCHDEV_ATTR_ID_PORT_MST_STATE:
+		if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
+			return -EOPNOTSUPP;
+
+		ret = dsa_port_set_mst_state(dp, &attr->u.mst_state, extack);
+		break;
 	case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
 		if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
 			return -EOPNOTSUPP;
@@ -301,6 +494,12 @@ static int dsa_slave_port_attr_set(struct net_device *dev, const void *ctx,
 
 		ret = dsa_port_ageing_time(dp, attr->u.ageing_time);
 		break;
+	case SWITCHDEV_ATTR_ID_BRIDGE_MST:
+		if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
+			return -EOPNOTSUPP;
+
+		ret = dsa_port_mst_enable(dp, attr->u.mst, extack);
+		break;
 	case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
 		if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
 			return -EOPNOTSUPP;
@@ -314,6 +513,12 @@ static int dsa_slave_port_attr_set(struct net_device *dev, const void *ctx,
 
 		ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack);
 		break;
+	case SWITCHDEV_ATTR_ID_VLAN_MSTI:
+		if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
+			return -EOPNOTSUPP;
+
+		ret = dsa_port_vlan_msti(dp, &attr->u.vlan_msti);
+		break;
 	default:
 		ret = -EOPNOTSUPP;
 		break;
@@ -348,9 +553,8 @@ static int dsa_slave_vlan_add(struct net_device *dev,
 			      const struct switchdev_obj *obj,
 			      struct netlink_ext_ack *extack)
 {
-	struct net_device *master = dsa_slave_to_master(dev);
 	struct dsa_port *dp = dsa_slave_to_port(dev);
-	struct switchdev_obj_port_vlan vlan;
+	struct switchdev_obj_port_vlan *vlan;
 	int err;
 
 	if (dsa_port_skip_vlan_configuration(dp)) {
@@ -358,14 +562,14 @@ static int dsa_slave_vlan_add(struct net_device *dev,
 		return 0;
 	}
 
-	vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj);
+	vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
 
 	/* Deny adding a bridge VLAN when there is already an 802.1Q upper with
 	 * the same VID.
 	 */
 	if (br_vlan_enabled(dsa_port_bridge_dev_get(dp))) {
 		rcu_read_lock();
-		err = dsa_slave_vlan_check_for_8021q_uppers(dev, &vlan);
+		err = dsa_slave_vlan_check_for_8021q_uppers(dev, vlan);
 		rcu_read_unlock();
 		if (err) {
 			NL_SET_ERR_MSG_MOD(extack,
@@ -374,21 +578,36 @@ static int dsa_slave_vlan_add(struct net_device *dev,
 		}
 	}
 
-	err = dsa_port_vlan_add(dp, &vlan, extack);
-	if (err)
-		return err;
+	return dsa_port_vlan_add(dp, vlan, extack);
+}
+
+/* Offload a VLAN installed on the bridge or on a foreign interface by
+ * installing it as a VLAN towards the CPU port.
+ */
+static int dsa_slave_host_vlan_add(struct net_device *dev,
+				   const struct switchdev_obj *obj,
+				   struct netlink_ext_ack *extack)
+{
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct switchdev_obj_port_vlan vlan;
+
+	/* Do nothing if this is a software bridge */
+	if (!dp->bridge)
+		return -EOPNOTSUPP;
 
-	/* We need the dedicated CPU port to be a member of the VLAN as well.
-	 * Even though drivers often handle CPU membership in special ways,
+	if (dsa_port_skip_vlan_configuration(dp)) {
+		NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN");
+		return 0;
+	}
+
+	vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj);
+
+	/* Even though drivers often handle CPU membership in special ways,
 	 * it doesn't make sense to program a PVID, so clear this flag.
 	 */
 	vlan.flags &= ~BRIDGE_VLAN_INFO_PVID;
 
-	err = dsa_port_vlan_add(dp->cpu_dp, &vlan, extack);
-	if (err)
-		return err;
-
-	return vlan_vid_add(master, htons(ETH_P_8021Q), vlan.vid);
+	return dsa_port_host_vlan_add(dp, &vlan, extack);
 }
 
 static int dsa_slave_port_obj_add(struct net_device *dev, const void *ctx,
@@ -412,13 +631,13 @@ static int dsa_slave_port_obj_add(struct net_device *dev, const void *ctx,
 		if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
 			return -EOPNOTSUPP;
 
-		err = dsa_port_host_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
+		err = dsa_port_bridge_host_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
 		break;
 	case SWITCHDEV_OBJ_ID_PORT_VLAN:
-		if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
-			return -EOPNOTSUPP;
-
-		err = dsa_slave_vlan_add(dev, obj, extack);
+		if (dsa_port_offloads_bridge_port(dp, obj->orig_dev))
+			err = dsa_slave_vlan_add(dev, obj, extack);
+		else
+			err = dsa_slave_host_vlan_add(dev, obj, extack);
 		break;
 	case SWITCHDEV_OBJ_ID_MRP:
 		if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
@@ -444,26 +663,33 @@ static int dsa_slave_port_obj_add(struct net_device *dev, const void *ctx,
 static int dsa_slave_vlan_del(struct net_device *dev,
 			      const struct switchdev_obj *obj)
 {
-	struct net_device *master = dsa_slave_to_master(dev);
 	struct dsa_port *dp = dsa_slave_to_port(dev);
 	struct switchdev_obj_port_vlan *vlan;
-	int err;
 
 	if (dsa_port_skip_vlan_configuration(dp))
 		return 0;
 
 	vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
 
-	/* Do not deprogram the CPU port as it may be shared with other user
-	 * ports which can be members of this VLAN as well.
-	 */
-	err = dsa_port_vlan_del(dp, vlan);
-	if (err)
-		return err;
+	return dsa_port_vlan_del(dp, vlan);
+}
 
-	vlan_vid_del(master, htons(ETH_P_8021Q), vlan->vid);
+static int dsa_slave_host_vlan_del(struct net_device *dev,
+				   const struct switchdev_obj *obj)
+{
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct switchdev_obj_port_vlan *vlan;
 
-	return 0;
+	/* Do nothing if this is a software bridge */
+	if (!dp->bridge)
+		return -EOPNOTSUPP;
+
+	if (dsa_port_skip_vlan_configuration(dp))
+		return 0;
+
+	vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
+
+	return dsa_port_host_vlan_del(dp, vlan);
 }
 
 static int dsa_slave_port_obj_del(struct net_device *dev, const void *ctx,
@@ -486,13 +712,13 @@ static int dsa_slave_port_obj_del(struct net_device *dev, const void *ctx,
 		if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
 			return -EOPNOTSUPP;
 
-		err = dsa_port_host_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
+		err = dsa_port_bridge_host_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
 		break;
 	case SWITCHDEV_OBJ_ID_PORT_VLAN:
-		if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev))
-			return -EOPNOTSUPP;
-
-		err = dsa_slave_vlan_del(dev, obj);
+		if (dsa_port_offloads_bridge_port(dp, obj->orig_dev))
+			err = dsa_slave_vlan_del(dev, obj);
+		else
+			err = dsa_slave_host_vlan_del(dev, obj);
 		break;
 	case SWITCHDEV_OBJ_ID_MRP:
 		if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev))
@@ -515,26 +741,6 @@ static int dsa_slave_port_obj_del(struct net_device *dev, const void *ctx,
 	return err;
 }
 
-static int dsa_slave_get_port_parent_id(struct net_device *dev,
-					struct netdev_phys_item_id *ppid)
-{
-	struct dsa_port *dp = dsa_slave_to_port(dev);
-	struct dsa_switch *ds = dp->ds;
-	struct dsa_switch_tree *dst = ds->dst;
-
-	/* For non-legacy ports, devlink is used and it takes
-	 * care of the name generation. This ndo implementation
-	 * should be removed with legacy support.
-	 */
-	if (dp->ds->devlink)
-		return -EOPNOTSUPP;
-
-	ppid->id_len = sizeof(dst->index);
-	memcpy(&ppid->id, &dst->index, ppid->id_len);
-
-	return 0;
-}
-
 static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
 						     struct sk_buff *skb)
 {
@@ -973,24 +1179,6 @@ static void dsa_slave_poll_controller(struct net_device *dev)
 }
 #endif
 
-static int dsa_slave_get_phys_port_name(struct net_device *dev,
-					char *name, size_t len)
-{
-	struct dsa_port *dp = dsa_slave_to_port(dev);
-
-	/* For non-legacy ports, devlink is used and it takes
-	 * care of the name generation. This ndo implementation
-	 * should be removed with legacy support.
-	 */
-	if (dp->ds->devlink)
-		return -EOPNOTSUPP;
-
-	if (snprintf(name, len, "p%d", dp->index) >= len)
-		return -EINVAL;
-
-	return 0;
-}
-
 static struct dsa_mall_tc_entry *
 dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
 {
@@ -1009,6 +1197,7 @@ dsa_slave_add_cls_matchall_mirred(struct net_device *dev,
 				  struct tc_cls_matchall_offload *cls,
 				  bool ingress)
 {
+	struct netlink_ext_ack *extack = cls->common.extack;
 	struct dsa_port *dp = dsa_slave_to_port(dev);
 	struct dsa_slave_priv *p = netdev_priv(dev);
 	struct dsa_mall_mirror_tc_entry *mirror;
@@ -1046,7 +1235,7 @@ dsa_slave_add_cls_matchall_mirred(struct net_device *dev,
 	mirror->to_local_port = to_dp->index;
 	mirror->ingress = ingress;
 
-	err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
+	err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress, extack);
 	if (err) {
 		kfree(mall_tc_entry);
 		return err;
@@ -1385,7 +1574,6 @@ static int dsa_slave_get_ts_info(struct net_device *dev,
 static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
 				     u16 vid)
 {
-	struct net_device *master = dsa_slave_to_master(dev);
 	struct dsa_port *dp = dsa_slave_to_port(dev);
 	struct switchdev_obj_port_vlan vlan = {
 		.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
@@ -1405,7 +1593,7 @@ static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
 	}
 
 	/* And CPU port... */
-	ret = dsa_port_vlan_add(dp->cpu_dp, &vlan, &extack);
+	ret = dsa_port_host_vlan_add(dp, &vlan, &extack);
 	if (ret) {
 		if (extack._msg)
 			netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index,
@@ -1413,13 +1601,12 @@ static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
 		return ret;
 	}
 
-	return vlan_vid_add(master, proto, vid);
+	return 0;
 }
 
 static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
 				      u16 vid)
 {
-	struct net_device *master = dsa_slave_to_master(dev);
 	struct dsa_port *dp = dsa_slave_to_port(dev);
 	struct switchdev_obj_port_vlan vlan = {
 		.vid = vid,
@@ -1428,16 +1615,11 @@ static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
 	};
 	int err;
 
-	/* Do not deprogram the CPU port as it may be shared with other user
-	 * ports which can be members of this VLAN as well.
-	 */
 	err = dsa_port_vlan_del(dp, &vlan);
 	if (err)
 		return err;
 
-	vlan_vid_del(master, proto, vid);
-
-	return 0;
+	return dsa_port_host_vlan_del(dp, &vlan);
 }
 
 static int dsa_slave_restore_vlan(struct net_device *vdev, int vid, void *arg)
@@ -1714,6 +1896,209 @@ out_master_failed:
 	return err;
 }
 
+static int __maybe_unused
+dsa_slave_dcbnl_set_default_prio(struct net_device *dev, struct dcb_app *app)
+{
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
+	unsigned long mask, new_prio;
+	int err, port = dp->index;
+
+	if (!ds->ops->port_set_default_prio)
+		return -EOPNOTSUPP;
+
+	err = dcb_ieee_setapp(dev, app);
+	if (err)
+		return err;
+
+	mask = dcb_ieee_getapp_mask(dev, app);
+	new_prio = __fls(mask);
+
+	err = ds->ops->port_set_default_prio(ds, port, new_prio);
+	if (err) {
+		dcb_ieee_delapp(dev, app);
+		return err;
+	}
+
+	return 0;
+}
+
+static int __maybe_unused
+dsa_slave_dcbnl_add_dscp_prio(struct net_device *dev, struct dcb_app *app)
+{
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
+	unsigned long mask, new_prio;
+	int err, port = dp->index;
+	u8 dscp = app->protocol;
+
+	if (!ds->ops->port_add_dscp_prio)
+		return -EOPNOTSUPP;
+
+	if (dscp >= 64) {
+		netdev_err(dev, "DSCP APP entry with protocol value %u is invalid\n",
+			   dscp);
+		return -EINVAL;
+	}
+
+	err = dcb_ieee_setapp(dev, app);
+	if (err)
+		return err;
+
+	mask = dcb_ieee_getapp_mask(dev, app);
+	new_prio = __fls(mask);
+
+	err = ds->ops->port_add_dscp_prio(ds, port, dscp, new_prio);
+	if (err) {
+		dcb_ieee_delapp(dev, app);
+		return err;
+	}
+
+	return 0;
+}
+
+static int __maybe_unused dsa_slave_dcbnl_ieee_setapp(struct net_device *dev,
+						      struct dcb_app *app)
+{
+	switch (app->selector) {
+	case IEEE_8021QAZ_APP_SEL_ETHERTYPE:
+		switch (app->protocol) {
+		case 0:
+			return dsa_slave_dcbnl_set_default_prio(dev, app);
+		default:
+			return -EOPNOTSUPP;
+		}
+		break;
+	case IEEE_8021QAZ_APP_SEL_DSCP:
+		return dsa_slave_dcbnl_add_dscp_prio(dev, app);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static int __maybe_unused
+dsa_slave_dcbnl_del_default_prio(struct net_device *dev, struct dcb_app *app)
+{
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
+	unsigned long mask, new_prio;
+	int err, port = dp->index;
+
+	if (!ds->ops->port_set_default_prio)
+		return -EOPNOTSUPP;
+
+	err = dcb_ieee_delapp(dev, app);
+	if (err)
+		return err;
+
+	mask = dcb_ieee_getapp_mask(dev, app);
+	new_prio = mask ? __fls(mask) : 0;
+
+	err = ds->ops->port_set_default_prio(ds, port, new_prio);
+	if (err) {
+		dcb_ieee_setapp(dev, app);
+		return err;
+	}
+
+	return 0;
+}
+
+static int __maybe_unused
+dsa_slave_dcbnl_del_dscp_prio(struct net_device *dev, struct dcb_app *app)
+{
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
+	int err, port = dp->index;
+	u8 dscp = app->protocol;
+
+	if (!ds->ops->port_del_dscp_prio)
+		return -EOPNOTSUPP;
+
+	err = dcb_ieee_delapp(dev, app);
+	if (err)
+		return err;
+
+	err = ds->ops->port_del_dscp_prio(ds, port, dscp, app->priority);
+	if (err) {
+		dcb_ieee_setapp(dev, app);
+		return err;
+	}
+
+	return 0;
+}
+
+static int __maybe_unused dsa_slave_dcbnl_ieee_delapp(struct net_device *dev,
+						      struct dcb_app *app)
+{
+	switch (app->selector) {
+	case IEEE_8021QAZ_APP_SEL_ETHERTYPE:
+		switch (app->protocol) {
+		case 0:
+			return dsa_slave_dcbnl_del_default_prio(dev, app);
+		default:
+			return -EOPNOTSUPP;
+		}
+		break;
+	case IEEE_8021QAZ_APP_SEL_DSCP:
+		return dsa_slave_dcbnl_del_dscp_prio(dev, app);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+/* Pre-populate the DCB application priority table with the priorities
+ * configured during switch setup, which we read from hardware here.
+ */
+static int dsa_slave_dcbnl_init(struct net_device *dev)
+{
+	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct dsa_switch *ds = dp->ds;
+	int port = dp->index;
+	int err;
+
+	if (ds->ops->port_get_default_prio) {
+		int prio = ds->ops->port_get_default_prio(ds, port);
+		struct dcb_app app = {
+			.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE,
+			.protocol = 0,
+			.priority = prio,
+		};
+
+		if (prio < 0)
+			return prio;
+
+		err = dcb_ieee_setapp(dev, &app);
+		if (err)
+			return err;
+	}
+
+	if (ds->ops->port_get_dscp_prio) {
+		int protocol;
+
+		for (protocol = 0; protocol < 64; protocol++) {
+			struct dcb_app app = {
+				.selector = IEEE_8021QAZ_APP_SEL_DSCP,
+				.protocol = protocol,
+			};
+			int prio;
+
+			prio = ds->ops->port_get_dscp_prio(ds, port, protocol);
+			if (prio == -EOPNOTSUPP)
+				continue;
+			if (prio < 0)
+				return prio;
+
+			app.priority = prio;
+
+			err = dcb_ieee_setapp(dev, &app);
+			if (err)
+				return err;
+		}
+	}
+
+	return 0;
+}
+
 static const struct ethtool_ops dsa_slave_ethtool_ops = {
 	.get_drvinfo		= dsa_slave_get_drvinfo,
 	.get_regs_len		= dsa_slave_get_regs_len,
@@ -1743,11 +2128,16 @@ static const struct ethtool_ops dsa_slave_ethtool_ops = {
 	.self_test		= dsa_slave_net_selftest,
 };
 
+static const struct dcbnl_rtnl_ops __maybe_unused dsa_slave_dcbnl_ops = {
+	.ieee_setapp		= dsa_slave_dcbnl_ieee_setapp,
+	.ieee_delapp		= dsa_slave_dcbnl_ieee_delapp,
+};
+
 static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev)
 {
 	struct dsa_port *dp = dsa_slave_to_port(dev);
 
-	return dp->ds->devlink ? &dp->devlink_port : NULL;
+	return &dp->devlink_port;
 }
 
 static void dsa_slave_get_stats64(struct net_device *dev,
@@ -1792,10 +2182,8 @@ static const struct net_device_ops dsa_slave_netdev_ops = {
 	.ndo_netpoll_cleanup	= dsa_slave_netpoll_cleanup,
 	.ndo_poll_controller	= dsa_slave_poll_controller,
 #endif
-	.ndo_get_phys_port_name	= dsa_slave_get_phys_port_name,
 	.ndo_setup_tc		= dsa_slave_setup_tc,
 	.ndo_get_stats64	= dsa_slave_get_stats64,
-	.ndo_get_port_parent_id	= dsa_slave_get_port_parent_id,
 	.ndo_vlan_rx_add_vid	= dsa_slave_vlan_rx_add_vid,
 	.ndo_vlan_rx_kill_vid	= dsa_slave_vlan_rx_kill_vid,
 	.ndo_get_devlink_port	= dsa_slave_get_devlink_port,
@@ -1917,15 +2305,6 @@ void dsa_slave_setup_tagger(struct net_device *slave)
 		slave->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 }
 
-static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
-static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
-					    struct netdev_queue *txq,
-					    void *_unused)
-{
-	lockdep_set_class(&txq->_xmit_lock,
-			  &dsa_slave_netdev_xmit_lock_key);
-}
-
 int dsa_slave_suspend(struct net_device *slave_dev)
 {
 	struct dsa_port *dp = dsa_slave_to_port(slave_dev);
@@ -1978,19 +2357,21 @@ int dsa_slave_create(struct dsa_port *port)
 		return -ENOMEM;
 
 	slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
+#if IS_ENABLED(CONFIG_DCB)
+	slave_dev->dcbnl_ops = &dsa_slave_dcbnl_ops;
+#endif
 	if (!is_zero_ether_addr(port->mac))
 		eth_hw_addr_set(slave_dev, port->mac);
 	else
 		eth_hw_addr_inherit(slave_dev, master);
 	slave_dev->priv_flags |= IFF_NO_QUEUE;
+	if (dsa_switch_supports_uc_filtering(ds))
+		slave_dev->priv_flags |= IFF_UNICAST_FLT;
 	slave_dev->netdev_ops = &dsa_slave_netdev_ops;
 	if (ds->ops->port_max_mtu)
 		slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index);
 	SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
 
-	netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
-				 NULL);
-
 	SET_NETDEV_DEV(slave_dev, port->ds->dev);
 	slave_dev->dev.of_node = port->dn;
 	slave_dev->vlan_features = master->vlan_features;
@@ -2036,6 +2417,17 @@ int dsa_slave_create(struct dsa_port *port)
 		goto out_phy;
 	}
 
+	if (IS_ENABLED(CONFIG_DCB)) {
+		ret = dsa_slave_dcbnl_init(slave_dev);
+		if (ret) {
+			netdev_err(slave_dev,
+				   "failed to initialize DCB: %pe\n",
+				   ERR_PTR(ret));
+			rtnl_unlock();
+			goto out_unregister;
+		}
+	}
+
 	ret = netdev_upper_dev_link(master, slave_dev, NULL);
 
 	rtnl_unlock();
@@ -2172,7 +2564,7 @@ dsa_slave_lag_changeupper(struct net_device *dev,
 			continue;
 
 		dp = dsa_slave_to_port(lower);
-		if (!dp->lag_dev)
+		if (!dp->lag)
 			/* Software LAG */
 			continue;
 
@@ -2201,7 +2593,7 @@ dsa_slave_lag_prechangeupper(struct net_device *dev,
 			continue;
 
 		dp = dsa_slave_to_port(lower);
-		if (!dp->lag_dev)
+		if (!dp->lag)
 			/* Software LAG */
 			continue;
 
@@ -2346,6 +2738,36 @@ static int dsa_slave_netdevice_event(struct notifier_block *nb,
 		err = dsa_port_lag_change(dp, info->lower_state_info);
 		return notifier_from_errno(err);
 	}
+	case NETDEV_CHANGE:
+	case NETDEV_UP: {
+		/* Track state of master port.
+		 * DSA driver may require the master port (and indirectly
+		 * the tagger) to be available for some special operation.
+		 */
+		if (netdev_uses_dsa(dev)) {
+			struct dsa_port *cpu_dp = dev->dsa_ptr;
+			struct dsa_switch_tree *dst = cpu_dp->ds->dst;
+
+			/* Track when the master port is UP */
+			dsa_tree_master_oper_state_change(dst, dev,
+							  netif_oper_up(dev));
+
+			/* Track when the master port is ready and can accept
+			 * packet.
+			 * NETDEV_UP event is not enough to flag a port as ready.
+			 * We also have to wait for linkwatch_do_dev to dev_activate
+			 * and emit a NETDEV_CHANGE event.
+			 * We check if a master port is ready by checking if the dev
+			 * have a qdisc assigned and is not noop.
+			 */
+			dsa_tree_master_admin_state_change(dst, dev,
+							   !qdisc_tx_is_noop(dev));
+
+			return NOTIFY_OK;
+		}
+
+		return NOTIFY_DONE;
+	}
 	case NETDEV_GOING_DOWN: {
 		struct dsa_port *dp, *cpu_dp;
 		struct dsa_switch_tree *dst;
@@ -2357,6 +2779,8 @@ static int dsa_slave_netdevice_event(struct notifier_block *nb,
 		cpu_dp = dev->dsa_ptr;
 		dst = cpu_dp->ds->dst;
 
+		dsa_tree_master_admin_state_change(dst, dev, false);
+
 		list_for_each_entry(dp, &dst->ports, list) {
 			if (!dsa_port_is_user(dp))
 				continue;
@@ -2379,43 +2803,40 @@ static void
 dsa_fdb_offload_notify(struct dsa_switchdev_event_work *switchdev_work)
 {
 	struct switchdev_notifier_fdb_info info = {};
-	struct dsa_switch *ds = switchdev_work->ds;
-	struct dsa_port *dp;
-
-	if (!dsa_is_user_port(ds, switchdev_work->port))
-		return;
 
 	info.addr = switchdev_work->addr;
 	info.vid = switchdev_work->vid;
 	info.offloaded = true;
-	dp = dsa_to_port(ds, switchdev_work->port);
 	call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
-				 dp->slave, &info.info, NULL);
+				 switchdev_work->orig_dev, &info.info, NULL);
 }
 
 static void dsa_slave_switchdev_event_work(struct work_struct *work)
 {
 	struct dsa_switchdev_event_work *switchdev_work =
 		container_of(work, struct dsa_switchdev_event_work, work);
-	struct dsa_switch *ds = switchdev_work->ds;
+	const unsigned char *addr = switchdev_work->addr;
+	struct net_device *dev = switchdev_work->dev;
+	u16 vid = switchdev_work->vid;
+	struct dsa_switch *ds;
 	struct dsa_port *dp;
 	int err;
 
-	dp = dsa_to_port(ds, switchdev_work->port);
+	dp = dsa_slave_to_port(dev);
+	ds = dp->ds;
 
 	switch (switchdev_work->event) {
 	case SWITCHDEV_FDB_ADD_TO_DEVICE:
 		if (switchdev_work->host_addr)
-			err = dsa_port_host_fdb_add(dp, switchdev_work->addr,
-						    switchdev_work->vid);
+			err = dsa_port_bridge_host_fdb_add(dp, addr, vid);
+		else if (dp->lag)
+			err = dsa_port_lag_fdb_add(dp, addr, vid);
 		else
-			err = dsa_port_fdb_add(dp, switchdev_work->addr,
-					       switchdev_work->vid);
+			err = dsa_port_fdb_add(dp, addr, vid);
 		if (err) {
 			dev_err(ds->dev,
 				"port %d failed to add %pM vid %d to fdb: %d\n",
-				dp->index, switchdev_work->addr,
-				switchdev_work->vid, err);
+				dp->index, addr, vid, err);
 			break;
 		}
 		dsa_fdb_offload_notify(switchdev_work);
@@ -2423,16 +2844,15 @@ static void dsa_slave_switchdev_event_work(struct work_struct *work)
 
 	case SWITCHDEV_FDB_DEL_TO_DEVICE:
 		if (switchdev_work->host_addr)
-			err = dsa_port_host_fdb_del(dp, switchdev_work->addr,
-						    switchdev_work->vid);
+			err = dsa_port_bridge_host_fdb_del(dp, addr, vid);
+		else if (dp->lag)
+			err = dsa_port_lag_fdb_del(dp, addr, vid);
 		else
-			err = dsa_port_fdb_del(dp, switchdev_work->addr,
-					       switchdev_work->vid);
+			err = dsa_port_fdb_del(dp, addr, vid);
 		if (err) {
 			dev_err(ds->dev,
 				"port %d failed to delete %pM vid %d from fdb: %d\n",
-				dp->index, switchdev_work->addr,
-				switchdev_work->vid, err);
+				dp->index, addr, vid, err);
 		}
 
 		break;
@@ -2470,19 +2890,20 @@ static int dsa_slave_fdb_event(struct net_device *dev,
 	if (ctx && ctx != dp)
 		return 0;
 
-	if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del)
-		return -EOPNOTSUPP;
-
-	if (dsa_slave_dev_check(orig_dev) &&
-	    switchdev_fdb_is_dynamically_learned(fdb_info))
+	if (!dp->bridge)
 		return 0;
 
-	/* FDB entries learned by the software bridge should be installed as
-	 * host addresses only if the driver requests assisted learning.
-	 */
-	if (switchdev_fdb_is_dynamically_learned(fdb_info) &&
-	    !ds->assisted_learning_on_cpu_port)
-		return 0;
+	if (switchdev_fdb_is_dynamically_learned(fdb_info)) {
+		if (dsa_port_offloads_bridge_port(dp, orig_dev))
+			return 0;
+
+		/* FDB entries learned by the software bridge or by foreign
+		 * bridge ports should be installed as host addresses only if
+		 * the driver requests assisted learning.
+		 */
+		if (!ds->assisted_learning_on_cpu_port)
+			return 0;
+	}
 
 	/* Also treat FDB entries on foreign interfaces bridged with us as host
 	 * addresses.
@@ -2490,6 +2911,18 @@ static int dsa_slave_fdb_event(struct net_device *dev,
 	if (dsa_foreign_dev_check(dev, orig_dev))
 		host_addr = true;
 
+	/* Check early that we're not doing work in vain.
+	 * Host addresses on LAG ports still require regular FDB ops,
+	 * since the CPU port isn't in a LAG.
+	 */
+	if (dp->lag && !host_addr) {
+		if (!ds->ops->lag_fdb_add || !ds->ops->lag_fdb_del)
+			return -EOPNOTSUPP;
+	} else {
+		if (!ds->ops->port_fdb_add || !ds->ops->port_fdb_del)
+			return -EOPNOTSUPP;
+	}
+
 	switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
 	if (!switchdev_work)
 		return -ENOMEM;
@@ -2500,10 +2933,9 @@ static int dsa_slave_fdb_event(struct net_device *dev,
 		   host_addr ? " as host address" : "");
 
 	INIT_WORK(&switchdev_work->work, dsa_slave_switchdev_event_work);
-	switchdev_work->ds = ds;
-	switchdev_work->port = dp->index;
 	switchdev_work->event = event;
 	switchdev_work->dev = dev;
+	switchdev_work->orig_dev = orig_dev;
 
 	ether_addr_copy(switchdev_work->addr, fdb_info->addr);
 	switchdev_work->vid = fdb_info->vid;
@@ -2532,8 +2964,7 @@ static int dsa_slave_switchdev_event(struct notifier_block *unused,
 		err = switchdev_handle_fdb_event_to_device(dev, event, ptr,
 							   dsa_slave_dev_check,
 							   dsa_foreign_dev_check,
-							   dsa_slave_fdb_event,
-							   NULL);
+							   dsa_slave_fdb_event);
 		return notifier_from_errno(err);
 	default:
 		return NOTIFY_DONE;
@@ -2550,14 +2981,16 @@ static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused,
 
 	switch (event) {
 	case SWITCHDEV_PORT_OBJ_ADD:
-		err = switchdev_handle_port_obj_add(dev, ptr,
-						    dsa_slave_dev_check,
-						    dsa_slave_port_obj_add);
+		err = switchdev_handle_port_obj_add_foreign(dev, ptr,
+							    dsa_slave_dev_check,
+							    dsa_foreign_dev_check,
+							    dsa_slave_port_obj_add);
 		return notifier_from_errno(err);
 	case SWITCHDEV_PORT_OBJ_DEL:
-		err = switchdev_handle_port_obj_del(dev, ptr,
-						    dsa_slave_dev_check,
-						    dsa_slave_port_obj_del);
+		err = switchdev_handle_port_obj_del_foreign(dev, ptr,
+							    dsa_slave_dev_check,
+							    dsa_foreign_dev_check,
+							    dsa_slave_port_obj_del);
 		return notifier_from_errno(err);
 	case SWITCHDEV_PORT_ATTR_SET:
 		err = switchdev_handle_port_attr_set(dev, ptr,
diff --git a/net/dsa/switch.c b/net/dsa/switch.c
index e3c7d2627a61..d25cd1da3eb3 100644
--- a/net/dsa/switch.c
+++ b/net/dsa/switch.c
@@ -96,7 +96,8 @@ static int dsa_switch_bridge_join(struct dsa_switch *ds,
 			return -EOPNOTSUPP;
 
 		err = ds->ops->port_bridge_join(ds, info->port, info->bridge,
-						&info->tx_fwd_offload);
+						&info->tx_fwd_offload,
+						info->extack);
 		if (err)
 			return err;
 	}
@@ -105,34 +106,24 @@ static int dsa_switch_bridge_join(struct dsa_switch *ds,
 	    ds->ops->crosschip_bridge_join) {
 		err = ds->ops->crosschip_bridge_join(ds, info->tree_index,
 						     info->sw_index,
-						     info->port, info->bridge);
+						     info->port, info->bridge,
+						     info->extack);
 		if (err)
 			return err;
 	}
 
-	return dsa_tag_8021q_bridge_join(ds, info);
+	return 0;
 }
 
-static int dsa_switch_bridge_leave(struct dsa_switch *ds,
-				   struct dsa_notifier_bridge_info *info)
+static int dsa_switch_sync_vlan_filtering(struct dsa_switch *ds,
+					  struct dsa_notifier_bridge_info *info)
 {
-	struct dsa_switch_tree *dst = ds->dst;
 	struct netlink_ext_ack extack = {0};
 	bool change_vlan_filtering = false;
 	bool vlan_filtering;
 	struct dsa_port *dp;
 	int err;
 
-	if (dst->index == info->tree_index && ds->index == info->sw_index &&
-	    ds->ops->port_bridge_leave)
-		ds->ops->port_bridge_leave(ds, info->port, info->bridge);
-
-	if ((dst->index != info->tree_index || ds->index != info->sw_index) &&
-	    ds->ops->crosschip_bridge_leave)
-		ds->ops->crosschip_bridge_leave(ds, info->tree_index,
-						info->sw_index, info->port,
-						info->bridge);
-
 	if (ds->needs_standalone_vlan_filtering &&
 	    !br_vlan_enabled(info->bridge.dev)) {
 		change_vlan_filtering = true;
@@ -172,7 +163,32 @@ static int dsa_switch_bridge_leave(struct dsa_switch *ds,
 			return err;
 	}
 
-	return dsa_tag_8021q_bridge_leave(ds, info);
+	return 0;
+}
+
+static int dsa_switch_bridge_leave(struct dsa_switch *ds,
+				   struct dsa_notifier_bridge_info *info)
+{
+	struct dsa_switch_tree *dst = ds->dst;
+	int err;
+
+	if (dst->index == info->tree_index && ds->index == info->sw_index &&
+	    ds->ops->port_bridge_leave)
+		ds->ops->port_bridge_leave(ds, info->port, info->bridge);
+
+	if ((dst->index != info->tree_index || ds->index != info->sw_index) &&
+	    ds->ops->crosschip_bridge_leave)
+		ds->ops->crosschip_bridge_leave(ds, info->tree_index,
+						info->sw_index, info->port,
+						info->bridge);
+
+	if (ds->dst->index == info->tree_index && ds->index == info->sw_index) {
+		err = dsa_switch_sync_vlan_filtering(ds, info);
+		if (err)
+			return err;
+	}
+
+	return 0;
 }
 
 /* Matches for all upstream-facing ports (the CPU port and all upstream-facing
@@ -197,20 +213,22 @@ static bool dsa_port_host_address_match(struct dsa_port *dp,
 }
 
 static struct dsa_mac_addr *dsa_mac_addr_find(struct list_head *addr_list,
-					      const unsigned char *addr,
-					      u16 vid)
+					      const unsigned char *addr, u16 vid,
+					      struct dsa_db db)
 {
 	struct dsa_mac_addr *a;
 
 	list_for_each_entry(a, addr_list, list)
-		if (ether_addr_equal(a->addr, addr) && a->vid == vid)
+		if (ether_addr_equal(a->addr, addr) && a->vid == vid &&
+		    dsa_db_equal(&a->db, &db))
 			return a;
 
 	return NULL;
 }
 
 static int dsa_port_do_mdb_add(struct dsa_port *dp,
-			       const struct switchdev_obj_port_mdb *mdb)
+			       const struct switchdev_obj_port_mdb *mdb,
+			       struct dsa_db db)
 {
 	struct dsa_switch *ds = dp->ds;
 	struct dsa_mac_addr *a;
@@ -219,11 +237,11 @@ static int dsa_port_do_mdb_add(struct dsa_port *dp,
 
 	/* No need to bother with refcounting for user ports */
 	if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp)))
-		return ds->ops->port_mdb_add(ds, port, mdb);
+		return ds->ops->port_mdb_add(ds, port, mdb, db);
 
 	mutex_lock(&dp->addr_lists_lock);
 
-	a = dsa_mac_addr_find(&dp->mdbs, mdb->addr, mdb->vid);
+	a = dsa_mac_addr_find(&dp->mdbs, mdb->addr, mdb->vid, db);
 	if (a) {
 		refcount_inc(&a->refcount);
 		goto out;
@@ -235,7 +253,7 @@ static int dsa_port_do_mdb_add(struct dsa_port *dp,
 		goto out;
 	}
 
-	err = ds->ops->port_mdb_add(ds, port, mdb);
+	err = ds->ops->port_mdb_add(ds, port, mdb, db);
 	if (err) {
 		kfree(a);
 		goto out;
@@ -243,6 +261,7 @@ static int dsa_port_do_mdb_add(struct dsa_port *dp,
 
 	ether_addr_copy(a->addr, mdb->addr);
 	a->vid = mdb->vid;
+	a->db = db;
 	refcount_set(&a->refcount, 1);
 	list_add_tail(&a->list, &dp->mdbs);
 
@@ -253,7 +272,8 @@ out:
 }
 
 static int dsa_port_do_mdb_del(struct dsa_port *dp,
-			       const struct switchdev_obj_port_mdb *mdb)
+			       const struct switchdev_obj_port_mdb *mdb,
+			       struct dsa_db db)
 {
 	struct dsa_switch *ds = dp->ds;
 	struct dsa_mac_addr *a;
@@ -262,11 +282,11 @@ static int dsa_port_do_mdb_del(struct dsa_port *dp,
 
 	/* No need to bother with refcounting for user ports */
 	if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp)))
-		return ds->ops->port_mdb_del(ds, port, mdb);
+		return ds->ops->port_mdb_del(ds, port, mdb, db);
 
 	mutex_lock(&dp->addr_lists_lock);
 
-	a = dsa_mac_addr_find(&dp->mdbs, mdb->addr, mdb->vid);
+	a = dsa_mac_addr_find(&dp->mdbs, mdb->addr, mdb->vid, db);
 	if (!a) {
 		err = -ENOENT;
 		goto out;
@@ -275,7 +295,7 @@ static int dsa_port_do_mdb_del(struct dsa_port *dp,
 	if (!refcount_dec_and_test(&a->refcount))
 		goto out;
 
-	err = ds->ops->port_mdb_del(ds, port, mdb);
+	err = ds->ops->port_mdb_del(ds, port, mdb, db);
 	if (err) {
 		refcount_set(&a->refcount, 1);
 		goto out;
@@ -291,7 +311,7 @@ out:
 }
 
 static int dsa_port_do_fdb_add(struct dsa_port *dp, const unsigned char *addr,
-			       u16 vid)
+			       u16 vid, struct dsa_db db)
 {
 	struct dsa_switch *ds = dp->ds;
 	struct dsa_mac_addr *a;
@@ -300,11 +320,11 @@ static int dsa_port_do_fdb_add(struct dsa_port *dp, const unsigned char *addr,
 
 	/* No need to bother with refcounting for user ports */
 	if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp)))
-		return ds->ops->port_fdb_add(ds, port, addr, vid);
+		return ds->ops->port_fdb_add(ds, port, addr, vid, db);
 
 	mutex_lock(&dp->addr_lists_lock);
 
-	a = dsa_mac_addr_find(&dp->fdbs, addr, vid);
+	a = dsa_mac_addr_find(&dp->fdbs, addr, vid, db);
 	if (a) {
 		refcount_inc(&a->refcount);
 		goto out;
@@ -316,7 +336,7 @@ static int dsa_port_do_fdb_add(struct dsa_port *dp, const unsigned char *addr,
 		goto out;
 	}
 
-	err = ds->ops->port_fdb_add(ds, port, addr, vid);
+	err = ds->ops->port_fdb_add(ds, port, addr, vid, db);
 	if (err) {
 		kfree(a);
 		goto out;
@@ -324,6 +344,7 @@ static int dsa_port_do_fdb_add(struct dsa_port *dp, const unsigned char *addr,
 
 	ether_addr_copy(a->addr, addr);
 	a->vid = vid;
+	a->db = db;
 	refcount_set(&a->refcount, 1);
 	list_add_tail(&a->list, &dp->fdbs);
 
@@ -334,7 +355,7 @@ out:
 }
 
 static int dsa_port_do_fdb_del(struct dsa_port *dp, const unsigned char *addr,
-			       u16 vid)
+			       u16 vid, struct dsa_db db)
 {
 	struct dsa_switch *ds = dp->ds;
 	struct dsa_mac_addr *a;
@@ -343,11 +364,11 @@ static int dsa_port_do_fdb_del(struct dsa_port *dp, const unsigned char *addr,
 
 	/* No need to bother with refcounting for user ports */
 	if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp)))
-		return ds->ops->port_fdb_del(ds, port, addr, vid);
+		return ds->ops->port_fdb_del(ds, port, addr, vid, db);
 
 	mutex_lock(&dp->addr_lists_lock);
 
-	a = dsa_mac_addr_find(&dp->fdbs, addr, vid);
+	a = dsa_mac_addr_find(&dp->fdbs, addr, vid, db);
 	if (!a) {
 		err = -ENOENT;
 		goto out;
@@ -356,7 +377,7 @@ static int dsa_port_do_fdb_del(struct dsa_port *dp, const unsigned char *addr,
 	if (!refcount_dec_and_test(&a->refcount))
 		goto out;
 
-	err = ds->ops->port_fdb_del(ds, port, addr, vid);
+	err = ds->ops->port_fdb_del(ds, port, addr, vid, db);
 	if (err) {
 		refcount_set(&a->refcount, 1);
 		goto out;
@@ -371,6 +392,77 @@ out:
 	return err;
 }
 
+static int dsa_switch_do_lag_fdb_add(struct dsa_switch *ds, struct dsa_lag *lag,
+				     const unsigned char *addr, u16 vid,
+				     struct dsa_db db)
+{
+	struct dsa_mac_addr *a;
+	int err = 0;
+
+	mutex_lock(&lag->fdb_lock);
+
+	a = dsa_mac_addr_find(&lag->fdbs, addr, vid, db);
+	if (a) {
+		refcount_inc(&a->refcount);
+		goto out;
+	}
+
+	a = kzalloc(sizeof(*a), GFP_KERNEL);
+	if (!a) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	err = ds->ops->lag_fdb_add(ds, *lag, addr, vid, db);
+	if (err) {
+		kfree(a);
+		goto out;
+	}
+
+	ether_addr_copy(a->addr, addr);
+	a->vid = vid;
+	refcount_set(&a->refcount, 1);
+	list_add_tail(&a->list, &lag->fdbs);
+
+out:
+	mutex_unlock(&lag->fdb_lock);
+
+	return err;
+}
+
+static int dsa_switch_do_lag_fdb_del(struct dsa_switch *ds, struct dsa_lag *lag,
+				     const unsigned char *addr, u16 vid,
+				     struct dsa_db db)
+{
+	struct dsa_mac_addr *a;
+	int err = 0;
+
+	mutex_lock(&lag->fdb_lock);
+
+	a = dsa_mac_addr_find(&lag->fdbs, addr, vid, db);
+	if (!a) {
+		err = -ENOENT;
+		goto out;
+	}
+
+	if (!refcount_dec_and_test(&a->refcount))
+		goto out;
+
+	err = ds->ops->lag_fdb_del(ds, *lag, addr, vid, db);
+	if (err) {
+		refcount_set(&a->refcount, 1);
+		goto out;
+	}
+
+	list_del(&a->list);
+	kfree(a);
+
+out:
+	mutex_unlock(&lag->fdb_lock);
+
+	return err;
+}
+
 static int dsa_switch_host_fdb_add(struct dsa_switch *ds,
 				   struct dsa_notifier_fdb_info *info)
 {
@@ -383,7 +475,8 @@ static int dsa_switch_host_fdb_add(struct dsa_switch *ds,
 	dsa_switch_for_each_port(dp, ds) {
 		if (dsa_port_host_address_match(dp, info->sw_index,
 						info->port)) {
-			err = dsa_port_do_fdb_add(dp, info->addr, info->vid);
+			err = dsa_port_do_fdb_add(dp, info->addr, info->vid,
+						  info->db);
 			if (err)
 				break;
 		}
@@ -404,7 +497,8 @@ static int dsa_switch_host_fdb_del(struct dsa_switch *ds,
 	dsa_switch_for_each_port(dp, ds) {
 		if (dsa_port_host_address_match(dp, info->sw_index,
 						info->port)) {
-			err = dsa_port_do_fdb_del(dp, info->addr, info->vid);
+			err = dsa_port_do_fdb_del(dp, info->addr, info->vid,
+						  info->db);
 			if (err)
 				break;
 		}
@@ -422,7 +516,7 @@ static int dsa_switch_fdb_add(struct dsa_switch *ds,
 	if (!ds->ops->port_fdb_add)
 		return -EOPNOTSUPP;
 
-	return dsa_port_do_fdb_add(dp, info->addr, info->vid);
+	return dsa_port_do_fdb_add(dp, info->addr, info->vid, info->db);
 }
 
 static int dsa_switch_fdb_del(struct dsa_switch *ds,
@@ -434,7 +528,43 @@ static int dsa_switch_fdb_del(struct dsa_switch *ds,
 	if (!ds->ops->port_fdb_del)
 		return -EOPNOTSUPP;
 
-	return dsa_port_do_fdb_del(dp, info->addr, info->vid);
+	return dsa_port_do_fdb_del(dp, info->addr, info->vid, info->db);
+}
+
+static int dsa_switch_lag_fdb_add(struct dsa_switch *ds,
+				  struct dsa_notifier_lag_fdb_info *info)
+{
+	struct dsa_port *dp;
+
+	if (!ds->ops->lag_fdb_add)
+		return -EOPNOTSUPP;
+
+	/* Notify switch only if it has a port in this LAG */
+	dsa_switch_for_each_port(dp, ds)
+		if (dsa_port_offloads_lag(dp, info->lag))
+			return dsa_switch_do_lag_fdb_add(ds, info->lag,
+							 info->addr, info->vid,
+							 info->db);
+
+	return 0;
+}
+
+static int dsa_switch_lag_fdb_del(struct dsa_switch *ds,
+				  struct dsa_notifier_lag_fdb_info *info)
+{
+	struct dsa_port *dp;
+
+	if (!ds->ops->lag_fdb_del)
+		return -EOPNOTSUPP;
+
+	/* Notify switch only if it has a port in this LAG */
+	dsa_switch_for_each_port(dp, ds)
+		if (dsa_port_offloads_lag(dp, info->lag))
+			return dsa_switch_do_lag_fdb_del(ds, info->lag,
+							 info->addr, info->vid,
+							 info->db);
+
+	return 0;
 }
 
 static int dsa_switch_lag_change(struct dsa_switch *ds,
@@ -487,7 +617,7 @@ static int dsa_switch_mdb_add(struct dsa_switch *ds,
 	if (!ds->ops->port_mdb_add)
 		return -EOPNOTSUPP;
 
-	return dsa_port_do_mdb_add(dp, info->mdb);
+	return dsa_port_do_mdb_add(dp, info->mdb, info->db);
 }
 
 static int dsa_switch_mdb_del(struct dsa_switch *ds,
@@ -499,7 +629,7 @@ static int dsa_switch_mdb_del(struct dsa_switch *ds,
 	if (!ds->ops->port_mdb_del)
 		return -EOPNOTSUPP;
 
-	return dsa_port_do_mdb_del(dp, info->mdb);
+	return dsa_port_do_mdb_del(dp, info->mdb, info->db);
 }
 
 static int dsa_switch_host_mdb_add(struct dsa_switch *ds,
@@ -514,7 +644,7 @@ static int dsa_switch_host_mdb_add(struct dsa_switch *ds,
 	dsa_switch_for_each_port(dp, ds) {
 		if (dsa_port_host_address_match(dp, info->sw_index,
 						info->port)) {
-			err = dsa_port_do_mdb_add(dp, info->mdb);
+			err = dsa_port_do_mdb_add(dp, info->mdb, info->db);
 			if (err)
 				break;
 		}
@@ -535,7 +665,7 @@ static int dsa_switch_host_mdb_del(struct dsa_switch *ds,
 	dsa_switch_for_each_port(dp, ds) {
 		if (dsa_port_host_address_match(dp, info->sw_index,
 						info->port)) {
-			err = dsa_port_do_mdb_del(dp, info->mdb);
+			err = dsa_port_do_mdb_del(dp, info->mdb, info->db);
 			if (err)
 				break;
 		}
@@ -544,6 +674,7 @@ static int dsa_switch_host_mdb_del(struct dsa_switch *ds,
 	return err;
 }
 
+/* Port VLANs match on the targeted port and on all DSA ports */
 static bool dsa_port_vlan_match(struct dsa_port *dp,
 				struct dsa_notifier_vlan_info *info)
 {
@@ -556,6 +687,126 @@ static bool dsa_port_vlan_match(struct dsa_port *dp,
 	return false;
 }
 
+/* Host VLANs match on the targeted port's CPU port, and on all DSA ports
+ * (upstream and downstream) of that switch and its upstream switches.
+ */
+static bool dsa_port_host_vlan_match(struct dsa_port *dp,
+				     struct dsa_notifier_vlan_info *info)
+{
+	struct dsa_port *targeted_dp, *cpu_dp;
+	struct dsa_switch *targeted_ds;
+
+	targeted_ds = dsa_switch_find(dp->ds->dst->index, info->sw_index);
+	targeted_dp = dsa_to_port(targeted_ds, info->port);
+	cpu_dp = targeted_dp->cpu_dp;
+
+	if (dsa_switch_is_upstream_of(dp->ds, targeted_ds))
+		return dsa_port_is_dsa(dp) || dp == cpu_dp;
+
+	return false;
+}
+
+static struct dsa_vlan *dsa_vlan_find(struct list_head *vlan_list,
+				      const struct switchdev_obj_port_vlan *vlan)
+{
+	struct dsa_vlan *v;
+
+	list_for_each_entry(v, vlan_list, list)
+		if (v->vid == vlan->vid)
+			return v;
+
+	return NULL;
+}
+
+static int dsa_port_do_vlan_add(struct dsa_port *dp,
+				const struct switchdev_obj_port_vlan *vlan,
+				struct netlink_ext_ack *extack)
+{
+	struct dsa_switch *ds = dp->ds;
+	int port = dp->index;
+	struct dsa_vlan *v;
+	int err = 0;
+
+	/* No need to bother with refcounting for user ports. */
+	if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp)))
+		return ds->ops->port_vlan_add(ds, port, vlan, extack);
+
+	/* No need to propagate on shared ports the existing VLANs that were
+	 * re-notified after just the flags have changed. This would cause a
+	 * refcount bump which we need to avoid, since it unbalances the
+	 * additions with the deletions.
+	 */
+	if (vlan->changed)
+		return 0;
+
+	mutex_lock(&dp->vlans_lock);
+
+	v = dsa_vlan_find(&dp->vlans, vlan);
+	if (v) {
+		refcount_inc(&v->refcount);
+		goto out;
+	}
+
+	v = kzalloc(sizeof(*v), GFP_KERNEL);
+	if (!v) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	err = ds->ops->port_vlan_add(ds, port, vlan, extack);
+	if (err) {
+		kfree(v);
+		goto out;
+	}
+
+	v->vid = vlan->vid;
+	refcount_set(&v->refcount, 1);
+	list_add_tail(&v->list, &dp->vlans);
+
+out:
+	mutex_unlock(&dp->vlans_lock);
+
+	return err;
+}
+
+static int dsa_port_do_vlan_del(struct dsa_port *dp,
+				const struct switchdev_obj_port_vlan *vlan)
+{
+	struct dsa_switch *ds = dp->ds;
+	int port = dp->index;
+	struct dsa_vlan *v;
+	int err = 0;
+
+	/* No need to bother with refcounting for user ports */
+	if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp)))
+		return ds->ops->port_vlan_del(ds, port, vlan);
+
+	mutex_lock(&dp->vlans_lock);
+
+	v = dsa_vlan_find(&dp->vlans, vlan);
+	if (!v) {
+		err = -ENOENT;
+		goto out;
+	}
+
+	if (!refcount_dec_and_test(&v->refcount))
+		goto out;
+
+	err = ds->ops->port_vlan_del(ds, port, vlan);
+	if (err) {
+		refcount_set(&v->refcount, 1);
+		goto out;
+	}
+
+	list_del(&v->list);
+	kfree(v);
+
+out:
+	mutex_unlock(&dp->vlans_lock);
+
+	return err;
+}
+
 static int dsa_switch_vlan_add(struct dsa_switch *ds,
 			       struct dsa_notifier_vlan_info *info)
 {
@@ -567,8 +818,8 @@ static int dsa_switch_vlan_add(struct dsa_switch *ds,
 
 	dsa_switch_for_each_port(dp, ds) {
 		if (dsa_port_vlan_match(dp, info)) {
-			err = ds->ops->port_vlan_add(ds, dp->index, info->vlan,
-						     info->extack);
+			err = dsa_port_do_vlan_add(dp, info->vlan,
+						   info->extack);
 			if (err)
 				return err;
 		}
@@ -580,15 +831,61 @@ static int dsa_switch_vlan_add(struct dsa_switch *ds,
 static int dsa_switch_vlan_del(struct dsa_switch *ds,
 			       struct dsa_notifier_vlan_info *info)
 {
+	struct dsa_port *dp;
+	int err;
+
 	if (!ds->ops->port_vlan_del)
 		return -EOPNOTSUPP;
 
-	if (ds->index == info->sw_index)
-		return ds->ops->port_vlan_del(ds, info->port, info->vlan);
+	dsa_switch_for_each_port(dp, ds) {
+		if (dsa_port_vlan_match(dp, info)) {
+			err = dsa_port_do_vlan_del(dp, info->vlan);
+			if (err)
+				return err;
+		}
+	}
+
+	return 0;
+}
+
+static int dsa_switch_host_vlan_add(struct dsa_switch *ds,
+				    struct dsa_notifier_vlan_info *info)
+{
+	struct dsa_port *dp;
+	int err;
+
+	if (!ds->ops->port_vlan_add)
+		return -EOPNOTSUPP;
+
+	dsa_switch_for_each_port(dp, ds) {
+		if (dsa_port_host_vlan_match(dp, info)) {
+			err = dsa_port_do_vlan_add(dp, info->vlan,
+						   info->extack);
+			if (err)
+				return err;
+		}
+	}
+
+	return 0;
+}
+
+static int dsa_switch_host_vlan_del(struct dsa_switch *ds,
+				    struct dsa_notifier_vlan_info *info)
+{
+	struct dsa_port *dp;
+	int err;
+
+	if (!ds->ops->port_vlan_del)
+		return -EOPNOTSUPP;
+
+	dsa_switch_for_each_port(dp, ds) {
+		if (dsa_port_host_vlan_match(dp, info)) {
+			err = dsa_port_do_vlan_del(dp, info->vlan);
+			if (err)
+				return err;
+		}
+	}
 
-	/* Do not deprogram the DSA links as they may be used as conduit
-	 * for other VLAN members in the fabric.
-	 */
 	return 0;
 }
 
@@ -683,6 +980,18 @@ dsa_switch_disconnect_tag_proto(struct dsa_switch *ds,
 	return 0;
 }
 
+static int
+dsa_switch_master_state_change(struct dsa_switch *ds,
+			       struct dsa_notifier_master_state_info *info)
+{
+	if (!ds->ops->master_state_change)
+		return 0;
+
+	ds->ops->master_state_change(ds, info->master, info->operational);
+
+	return 0;
+}
+
 static int dsa_switch_event(struct notifier_block *nb,
 			    unsigned long event, void *info)
 {
@@ -711,6 +1020,12 @@ static int dsa_switch_event(struct notifier_block *nb,
 	case DSA_NOTIFIER_HOST_FDB_DEL:
 		err = dsa_switch_host_fdb_del(ds, info);
 		break;
+	case DSA_NOTIFIER_LAG_FDB_ADD:
+		err = dsa_switch_lag_fdb_add(ds, info);
+		break;
+	case DSA_NOTIFIER_LAG_FDB_DEL:
+		err = dsa_switch_lag_fdb_del(ds, info);
+		break;
 	case DSA_NOTIFIER_LAG_CHANGE:
 		err = dsa_switch_lag_change(ds, info);
 		break;
@@ -738,6 +1053,12 @@ static int dsa_switch_event(struct notifier_block *nb,
 	case DSA_NOTIFIER_VLAN_DEL:
 		err = dsa_switch_vlan_del(ds, info);
 		break;
+	case DSA_NOTIFIER_HOST_VLAN_ADD:
+		err = dsa_switch_host_vlan_add(ds, info);
+		break;
+	case DSA_NOTIFIER_HOST_VLAN_DEL:
+		err = dsa_switch_host_vlan_del(ds, info);
+		break;
 	case DSA_NOTIFIER_MTU:
 		err = dsa_switch_mtu(ds, info);
 		break;
@@ -756,6 +1077,9 @@ static int dsa_switch_event(struct notifier_block *nb,
 	case DSA_NOTIFIER_TAG_8021Q_VLAN_DEL:
 		err = dsa_switch_tag_8021q_vlan_del(ds, info);
 		break;
+	case DSA_NOTIFIER_MASTER_STATE_CHANGE:
+		err = dsa_switch_master_state_change(ds, info);
+		break;
 	default:
 		err = -EOPNOTSUPP;
 		break;
diff --git a/net/dsa/tag_8021q.c b/net/dsa/tag_8021q.c
index 27712a81c967..a786569203f0 100644
--- a/net/dsa/tag_8021q.c
+++ b/net/dsa/tag_8021q.c
@@ -16,15 +16,11 @@
  *
  * | 11  | 10  |  9  |  8  |  7  |  6  |  5  |  4  |  3  |  2  |  1  |  0  |
  * +-----------+-----+-----------------+-----------+-----------------------+
- * |    DIR    | VBID|    SWITCH_ID    |   VBID    |          PORT         |
+ * |    RSV    | VBID|    SWITCH_ID    |   VBID    |          PORT         |
  * +-----------+-----+-----------------+-----------+-----------------------+
  *
- * DIR - VID[11:10]:
- *	Direction flags.
- *	* 1 (0b01) for RX VLAN,
- *	* 2 (0b10) for TX VLAN.
- *	These values make the special VIDs of 0, 1 and 4095 to be left
- *	unused by this coding scheme.
+ * RSV - VID[11:10]:
+ *	Reserved. Must be set to 3 (0b11).
  *
  * SWITCH_ID - VID[8:6]:
  *	Index of switch within DSA tree. Must be between 0 and 7.
@@ -32,18 +28,17 @@
  * VBID - { VID[9], VID[5:4] }:
  *	Virtual bridge ID. If between 1 and 7, packet targets the broadcast
  *	domain of a bridge. If transmitted as zero, packet targets a single
- *	port. Field only valid on transmit, must be ignored on receive.
+ *	port.
  *
  * PORT - VID[3:0]:
  *	Index of switch port. Must be between 0 and 15.
  */
 
-#define DSA_8021Q_DIR_SHIFT		10
-#define DSA_8021Q_DIR_MASK		GENMASK(11, 10)
-#define DSA_8021Q_DIR(x)		(((x) << DSA_8021Q_DIR_SHIFT) & \
-						 DSA_8021Q_DIR_MASK)
-#define DSA_8021Q_DIR_RX		DSA_8021Q_DIR(1)
-#define DSA_8021Q_DIR_TX		DSA_8021Q_DIR(2)
+#define DSA_8021Q_RSV_VAL		3
+#define DSA_8021Q_RSV_SHIFT		10
+#define DSA_8021Q_RSV_MASK		GENMASK(11, 10)
+#define DSA_8021Q_RSV			((DSA_8021Q_RSV_VAL << DSA_8021Q_RSV_SHIFT) & \
+							       DSA_8021Q_RSV_MASK)
 
 #define DSA_8021Q_SWITCH_ID_SHIFT	6
 #define DSA_8021Q_SWITCH_ID_MASK	GENMASK(8, 6)
@@ -67,34 +62,24 @@
 #define DSA_8021Q_PORT(x)		(((x) << DSA_8021Q_PORT_SHIFT) & \
 						 DSA_8021Q_PORT_MASK)
 
-u16 dsa_8021q_bridge_tx_fwd_offload_vid(unsigned int bridge_num)
+u16 dsa_tag_8021q_bridge_vid(unsigned int bridge_num)
 {
 	/* The VBID value of 0 is reserved for precise TX, but it is also
 	 * reserved/invalid for the bridge_num, so all is well.
 	 */
-	return DSA_8021Q_DIR_TX | DSA_8021Q_VBID(bridge_num);
+	return DSA_8021Q_RSV | DSA_8021Q_VBID(bridge_num);
 }
-EXPORT_SYMBOL_GPL(dsa_8021q_bridge_tx_fwd_offload_vid);
-
-/* Returns the VID to be inserted into the frame from xmit for switch steering
- * instructions on egress. Encodes switch ID and port ID.
- */
-u16 dsa_tag_8021q_tx_vid(const struct dsa_port *dp)
-{
-	return DSA_8021Q_DIR_TX | DSA_8021Q_SWITCH_ID(dp->ds->index) |
-	       DSA_8021Q_PORT(dp->index);
-}
-EXPORT_SYMBOL_GPL(dsa_tag_8021q_tx_vid);
+EXPORT_SYMBOL_GPL(dsa_tag_8021q_bridge_vid);
 
 /* Returns the VID that will be installed as pvid for this switch port, sent as
  * tagged egress towards the CPU port and decoded by the rcv function.
  */
-u16 dsa_tag_8021q_rx_vid(const struct dsa_port *dp)
+u16 dsa_tag_8021q_standalone_vid(const struct dsa_port *dp)
 {
-	return DSA_8021Q_DIR_RX | DSA_8021Q_SWITCH_ID(dp->ds->index) |
+	return DSA_8021Q_RSV | DSA_8021Q_SWITCH_ID(dp->ds->index) |
 	       DSA_8021Q_PORT(dp->index);
 }
-EXPORT_SYMBOL_GPL(dsa_tag_8021q_rx_vid);
+EXPORT_SYMBOL_GPL(dsa_tag_8021q_standalone_vid);
 
 /* Returns the decoded switch ID from the RX VID. */
 int dsa_8021q_rx_switch_id(u16 vid)
@@ -110,21 +95,20 @@ int dsa_8021q_rx_source_port(u16 vid)
 }
 EXPORT_SYMBOL_GPL(dsa_8021q_rx_source_port);
 
-bool vid_is_dsa_8021q_rxvlan(u16 vid)
+/* Returns the decoded VBID from the RX VID. */
+static int dsa_tag_8021q_rx_vbid(u16 vid)
 {
-	return (vid & DSA_8021Q_DIR_MASK) == DSA_8021Q_DIR_RX;
-}
-EXPORT_SYMBOL_GPL(vid_is_dsa_8021q_rxvlan);
+	u16 vbid_hi = (vid & DSA_8021Q_VBID_HI_MASK) >> DSA_8021Q_VBID_HI_SHIFT;
+	u16 vbid_lo = (vid & DSA_8021Q_VBID_LO_MASK) >> DSA_8021Q_VBID_LO_SHIFT;
 
-bool vid_is_dsa_8021q_txvlan(u16 vid)
-{
-	return (vid & DSA_8021Q_DIR_MASK) == DSA_8021Q_DIR_TX;
+	return (vbid_hi << 2) | vbid_lo;
 }
-EXPORT_SYMBOL_GPL(vid_is_dsa_8021q_txvlan);
 
 bool vid_is_dsa_8021q(u16 vid)
 {
-	return vid_is_dsa_8021q_rxvlan(vid) || vid_is_dsa_8021q_txvlan(vid);
+	u16 rsv = (vid & DSA_8021Q_RSV_MASK) >> DSA_8021Q_RSV_SHIFT;
+
+	return rsv == DSA_8021Q_RSV_VAL;
 }
 EXPORT_SYMBOL_GPL(vid_is_dsa_8021q);
 
@@ -242,12 +226,8 @@ int dsa_switch_tag_8021q_vlan_add(struct dsa_switch *ds,
 			u16 flags = 0;
 
 			if (dsa_port_is_user(dp))
-				flags |= BRIDGE_VLAN_INFO_UNTAGGED;
-
-			if (vid_is_dsa_8021q_rxvlan(info->vid) &&
-			    dsa_8021q_rx_switch_id(info->vid) == ds->index &&
-			    dsa_8021q_rx_source_port(info->vid) == dp->index)
-				flags |= BRIDGE_VLAN_INFO_PVID;
+				flags |= BRIDGE_VLAN_INFO_UNTAGGED |
+					 BRIDGE_VLAN_INFO_PVID;
 
 			err = dsa_port_do_tag_8021q_vlan_add(dp, info->vid,
 							     flags);
@@ -279,162 +259,78 @@ int dsa_switch_tag_8021q_vlan_del(struct dsa_switch *ds,
 	return 0;
 }
 
-/* RX VLAN tagging (left) and TX VLAN tagging (right) setup shown for a single
- * front-panel switch port (here swp0).
+/* There are 2 ways of offloading tag_8021q VLANs.
  *
- * Port identification through VLAN (802.1Q) tags has different requirements
- * for it to work effectively:
- *  - On RX (ingress from network): each front-panel port must have a pvid
- *    that uniquely identifies it, and the egress of this pvid must be tagged
- *    towards the CPU port, so that software can recover the source port based
- *    on the VID in the frame. But this would only work for standalone ports;
- *    if bridged, this VLAN setup would break autonomous forwarding and would
- *    force all switched traffic to pass through the CPU. So we must also make
- *    the other front-panel ports members of this VID we're adding, albeit
- *    we're not making it their PVID (they'll still have their own).
- *  - On TX (ingress from CPU and towards network) we are faced with a problem.
- *    If we were to tag traffic (from within DSA) with the port's pvid, all
- *    would be well, assuming the switch ports were standalone. Frames would
- *    have no choice but to be directed towards the correct front-panel port.
- *    But because we also want the RX VLAN to not break bridging, then
- *    inevitably that means that we have to give them a choice (of what
- *    front-panel port to go out on), and therefore we cannot steer traffic
- *    based on the RX VID. So what we do is simply install one more VID on the
- *    front-panel and CPU ports, and profit off of the fact that steering will
- *    work just by virtue of the fact that there is only one other port that's
- *    a member of the VID we're tagging the traffic with - the desired one.
+ * One is to use a hardware TCAM to push the port's standalone VLAN into the
+ * frame when forwarding it to the CPU, as an egress modification rule on the
+ * CPU port. This is preferable because it has no side effects for the
+ * autonomous forwarding path, and accomplishes tag_8021q's primary goal of
+ * identifying the source port of each packet based on VLAN ID.
  *
- * So at the end, each front-panel port will have one RX VID (also the PVID),
- * the RX VID of all other front-panel ports that are in the same bridge, and
- * one TX VID. Whereas the CPU port will have the RX and TX VIDs of all
- * front-panel ports, and on top of that, is also tagged-input and
- * tagged-output (VLAN trunk).
+ * The other is to commit the tag_8021q VLAN as a PVID to the VLAN table, and
+ * to configure the port as VLAN-unaware. This is less preferable because
+ * unique source port identification can only be done for standalone ports;
+ * under a VLAN-unaware bridge, all ports share the same tag_8021q VLAN as
+ * PVID, and under a VLAN-aware bridge, packets received by software will not
+ * have tag_8021q VLANs appended, just bridge VLANs.
  *
- *               CPU port                               CPU port
- * +-------------+-----+-------------+    +-------------+-----+-------------+
- * |  RX VID     |     |             |    |  TX VID     |     |             |
- * |  of swp0    |     |             |    |  of swp0    |     |             |
- * |             +-----+             |    |             +-----+             |
- * |                ^ T              |    |                | Tagged         |
- * |                |                |    |                | ingress        |
- * |    +-------+---+---+-------+    |    |    +-----------+                |
- * |    |       |       |       |    |    |    | Untagged                   |
- * |    |     U v     U v     U v    |    |    v egress                     |
- * | +-----+ +-----+ +-----+ +-----+ |    | +-----+ +-----+ +-----+ +-----+ |
- * | |     | |     | |     | |     | |    | |     | |     | |     | |     | |
- * | |PVID | |     | |     | |     | |    | |     | |     | |     | |     | |
- * +-+-----+-+-----+-+-----+-+-----+-+    +-+-----+-+-----+-+-----+-+-----+-+
- *   swp0    swp1    swp2    swp3           swp0    swp1    swp2    swp3
+ * For tag_8021q implementations of the second type, this method is used to
+ * replace the standalone tag_8021q VLAN of a port with the tag_8021q VLAN to
+ * be used for VLAN-unaware bridging.
  */
-static bool
-dsa_port_tag_8021q_bridge_match(struct dsa_port *dp,
-				struct dsa_notifier_bridge_info *info)
+int dsa_tag_8021q_bridge_join(struct dsa_switch *ds, int port,
+			      struct dsa_bridge bridge)
 {
-	/* Don't match on self */
-	if (dp->ds->dst->index == info->tree_index &&
-	    dp->ds->index == info->sw_index &&
-	    dp->index == info->port)
-		return false;
-
-	if (dsa_port_is_user(dp))
-		return dsa_port_offloads_bridge(dp, &info->bridge);
-
-	return false;
-}
-
-int dsa_tag_8021q_bridge_join(struct dsa_switch *ds,
-			      struct dsa_notifier_bridge_info *info)
-{
-	struct dsa_switch *targeted_ds;
-	struct dsa_port *targeted_dp;
-	struct dsa_port *dp;
-	u16 targeted_rx_vid;
+	struct dsa_port *dp = dsa_to_port(ds, port);
+	u16 standalone_vid, bridge_vid;
 	int err;
 
-	if (!ds->tag_8021q_ctx)
-		return 0;
-
-	targeted_ds = dsa_switch_find(info->tree_index, info->sw_index);
-	targeted_dp = dsa_to_port(targeted_ds, info->port);
-	targeted_rx_vid = dsa_tag_8021q_rx_vid(targeted_dp);
-
-	dsa_switch_for_each_port(dp, ds) {
-		u16 rx_vid = dsa_tag_8021q_rx_vid(dp);
-
-		if (!dsa_port_tag_8021q_bridge_match(dp, info))
-			continue;
+	/* Delete the standalone VLAN of the port and replace it with a
+	 * bridging VLAN
+	 */
+	standalone_vid = dsa_tag_8021q_standalone_vid(dp);
+	bridge_vid = dsa_tag_8021q_bridge_vid(bridge.num);
 
-		/* Install the RX VID of the targeted port in our VLAN table */
-		err = dsa_port_tag_8021q_vlan_add(dp, targeted_rx_vid, true);
-		if (err)
-			return err;
+	err = dsa_port_tag_8021q_vlan_add(dp, bridge_vid, true);
+	if (err)
+		return err;
 
-		/* Install our RX VID into the targeted port's VLAN table */
-		err = dsa_port_tag_8021q_vlan_add(targeted_dp, rx_vid, true);
-		if (err)
-			return err;
-	}
+	dsa_port_tag_8021q_vlan_del(dp, standalone_vid, false);
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(dsa_tag_8021q_bridge_join);
 
-int dsa_tag_8021q_bridge_leave(struct dsa_switch *ds,
-			       struct dsa_notifier_bridge_info *info)
+void dsa_tag_8021q_bridge_leave(struct dsa_switch *ds, int port,
+				struct dsa_bridge bridge)
 {
-	struct dsa_switch *targeted_ds;
-	struct dsa_port *targeted_dp;
-	struct dsa_port *dp;
-	u16 targeted_rx_vid;
-
-	if (!ds->tag_8021q_ctx)
-		return 0;
-
-	targeted_ds = dsa_switch_find(info->tree_index, info->sw_index);
-	targeted_dp = dsa_to_port(targeted_ds, info->port);
-	targeted_rx_vid = dsa_tag_8021q_rx_vid(targeted_dp);
-
-	dsa_switch_for_each_port(dp, ds) {
-		u16 rx_vid = dsa_tag_8021q_rx_vid(dp);
-
-		if (!dsa_port_tag_8021q_bridge_match(dp, info))
-			continue;
+	struct dsa_port *dp = dsa_to_port(ds, port);
+	u16 standalone_vid, bridge_vid;
+	int err;
 
-		/* Remove the RX VID of the targeted port from our VLAN table */
-		dsa_port_tag_8021q_vlan_del(dp, targeted_rx_vid, true);
+	/* Delete the bridging VLAN of the port and replace it with a
+	 * standalone VLAN
+	 */
+	standalone_vid = dsa_tag_8021q_standalone_vid(dp);
+	bridge_vid = dsa_tag_8021q_bridge_vid(bridge.num);
 
-		/* Remove our RX VID from the targeted port's VLAN table */
-		dsa_port_tag_8021q_vlan_del(targeted_dp, rx_vid, true);
+	err = dsa_port_tag_8021q_vlan_add(dp, standalone_vid, false);
+	if (err) {
+		dev_err(ds->dev,
+			"Failed to delete tag_8021q standalone VLAN %d from port %d: %pe\n",
+			standalone_vid, port, ERR_PTR(err));
 	}
 
-	return 0;
-}
-
-int dsa_tag_8021q_bridge_tx_fwd_offload(struct dsa_switch *ds, int port,
-					struct dsa_bridge bridge)
-{
-	u16 tx_vid = dsa_8021q_bridge_tx_fwd_offload_vid(bridge.num);
-
-	return dsa_port_tag_8021q_vlan_add(dsa_to_port(ds, port), tx_vid,
-					   true);
+	dsa_port_tag_8021q_vlan_del(dp, bridge_vid, true);
 }
-EXPORT_SYMBOL_GPL(dsa_tag_8021q_bridge_tx_fwd_offload);
+EXPORT_SYMBOL_GPL(dsa_tag_8021q_bridge_leave);
 
-void dsa_tag_8021q_bridge_tx_fwd_unoffload(struct dsa_switch *ds, int port,
-					   struct dsa_bridge bridge)
-{
-	u16 tx_vid = dsa_8021q_bridge_tx_fwd_offload_vid(bridge.num);
-
-	dsa_port_tag_8021q_vlan_del(dsa_to_port(ds, port), tx_vid, true);
-}
-EXPORT_SYMBOL_GPL(dsa_tag_8021q_bridge_tx_fwd_unoffload);
-
-/* Set up a port's tag_8021q RX and TX VLAN for standalone mode operation */
+/* Set up a port's standalone tag_8021q VLAN */
 static int dsa_tag_8021q_port_setup(struct dsa_switch *ds, int port)
 {
 	struct dsa_8021q_context *ctx = ds->tag_8021q_ctx;
 	struct dsa_port *dp = dsa_to_port(ds, port);
-	u16 rx_vid = dsa_tag_8021q_rx_vid(dp);
-	u16 tx_vid = dsa_tag_8021q_tx_vid(dp);
+	u16 vid = dsa_tag_8021q_standalone_vid(dp);
 	struct net_device *master;
 	int err;
 
@@ -446,30 +342,16 @@ static int dsa_tag_8021q_port_setup(struct dsa_switch *ds, int port)
 
 	master = dp->cpu_dp->master;
 
-	/* Add this user port's RX VID to the membership list of all others
-	 * (including itself). This is so that bridging will not be hindered.
-	 * L2 forwarding rules still take precedence when there are no VLAN
-	 * restrictions, so there are no concerns about leaking traffic.
-	 */
-	err = dsa_port_tag_8021q_vlan_add(dp, rx_vid, false);
+	err = dsa_port_tag_8021q_vlan_add(dp, vid, false);
 	if (err) {
 		dev_err(ds->dev,
-			"Failed to apply RX VID %d to port %d: %pe\n",
-			rx_vid, port, ERR_PTR(err));
+			"Failed to apply standalone VID %d to port %d: %pe\n",
+			vid, port, ERR_PTR(err));
 		return err;
 	}
 
-	/* Add @rx_vid to the master's RX filter. */
-	vlan_vid_add(master, ctx->proto, rx_vid);
-
-	/* Finally apply the TX VID on this port and on the CPU port */
-	err = dsa_port_tag_8021q_vlan_add(dp, tx_vid, false);
-	if (err) {
-		dev_err(ds->dev,
-			"Failed to apply TX VID %d on port %d: %pe\n",
-			tx_vid, port, ERR_PTR(err));
-		return err;
-	}
+	/* Add the VLAN to the master's RX filter. */
+	vlan_vid_add(master, ctx->proto, vid);
 
 	return err;
 }
@@ -478,8 +360,7 @@ static void dsa_tag_8021q_port_teardown(struct dsa_switch *ds, int port)
 {
 	struct dsa_8021q_context *ctx = ds->tag_8021q_ctx;
 	struct dsa_port *dp = dsa_to_port(ds, port);
-	u16 rx_vid = dsa_tag_8021q_rx_vid(dp);
-	u16 tx_vid = dsa_tag_8021q_tx_vid(dp);
+	u16 vid = dsa_tag_8021q_standalone_vid(dp);
 	struct net_device *master;
 
 	/* The CPU port is implicitly configured by
@@ -490,11 +371,9 @@ static void dsa_tag_8021q_port_teardown(struct dsa_switch *ds, int port)
 
 	master = dp->cpu_dp->master;
 
-	dsa_port_tag_8021q_vlan_del(dp, rx_vid, false);
+	dsa_port_tag_8021q_vlan_del(dp, vid, false);
 
-	vlan_vid_del(master, ctx->proto, rx_vid);
-
-	dsa_port_tag_8021q_vlan_del(dp, tx_vid, false);
+	vlan_vid_del(master, ctx->proto, vid);
 }
 
 static int dsa_tag_8021q_setup(struct dsa_switch *ds)
@@ -573,23 +452,57 @@ struct sk_buff *dsa_8021q_xmit(struct sk_buff *skb, struct net_device *netdev,
 }
 EXPORT_SYMBOL_GPL(dsa_8021q_xmit);
 
-void dsa_8021q_rcv(struct sk_buff *skb, int *source_port, int *switch_id)
+struct net_device *dsa_tag_8021q_find_port_by_vbid(struct net_device *master,
+						   int vbid)
+{
+	struct dsa_port *cpu_dp = master->dsa_ptr;
+	struct dsa_switch_tree *dst = cpu_dp->dst;
+	struct dsa_port *dp;
+
+	if (WARN_ON(!vbid))
+		return NULL;
+
+	dsa_tree_for_each_user_port(dp, dst) {
+		if (!dp->bridge)
+			continue;
+
+		if (dp->stp_state != BR_STATE_LEARNING &&
+		    dp->stp_state != BR_STATE_FORWARDING)
+			continue;
+
+		if (dp->cpu_dp != cpu_dp)
+			continue;
+
+		if (dsa_port_bridge_num_get(dp) == vbid)
+			return dp->slave;
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(dsa_tag_8021q_find_port_by_vbid);
+
+void dsa_8021q_rcv(struct sk_buff *skb, int *source_port, int *switch_id,
+		   int *vbid)
 {
 	u16 vid, tci;
 
-	skb_push_rcsum(skb, ETH_HLEN);
 	if (skb_vlan_tag_present(skb)) {
 		tci = skb_vlan_tag_get(skb);
 		__vlan_hwaccel_clear_tag(skb);
 	} else {
+		skb_push_rcsum(skb, ETH_HLEN);
 		__skb_vlan_pop(skb, &tci);
+		skb_pull_rcsum(skb, ETH_HLEN);
 	}
-	skb_pull_rcsum(skb, ETH_HLEN);
 
 	vid = tci & VLAN_VID_MASK;
 
 	*source_port = dsa_8021q_rx_source_port(vid);
 	*switch_id = dsa_8021q_rx_switch_id(vid);
+
+	if (vbid)
+		*vbid = dsa_tag_8021q_rx_vbid(vid);
+
 	skb->priority = (tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
 }
 EXPORT_SYMBOL_GPL(dsa_8021q_rcv);
diff --git a/net/dsa/tag_dsa.c b/net/dsa/tag_dsa.c
index 8abf39dcac64..e4b6e3f2a3db 100644
--- a/net/dsa/tag_dsa.c
+++ b/net/dsa/tag_dsa.c
@@ -127,6 +127,7 @@ static struct sk_buff *dsa_xmit_ll(struct sk_buff *skb, struct net_device *dev,
 				   u8 extra)
 {
 	struct dsa_port *dp = dsa_slave_to_port(dev);
+	struct net_device *br_dev;
 	u8 tag_dev, tag_port;
 	enum dsa_cmd cmd;
 	u8 *dsa_header;
@@ -149,7 +150,16 @@ static struct sk_buff *dsa_xmit_ll(struct sk_buff *skb, struct net_device *dev,
 		tag_port = dp->index;
 	}
 
-	if (skb->protocol == htons(ETH_P_8021Q)) {
+	br_dev = dsa_port_bridge_dev_get(dp);
+
+	/* If frame is already 802.1Q tagged, we can convert it to a DSA
+	 * tag (avoiding a memmove), but only if the port is standalone
+	 * (in which case we always send FROM_CPU) or if the port's
+	 * bridge has VLAN filtering enabled (in which case the CPU port
+	 * will be a member of the VLAN).
+	 */
+	if (skb->protocol == htons(ETH_P_8021Q) &&
+	    (!br_dev || br_vlan_enabled(br_dev))) {
 		if (extra) {
 			skb_push(skb, extra);
 			dsa_alloc_etype_header(skb, extra);
@@ -166,10 +176,9 @@ static struct sk_buff *dsa_xmit_ll(struct sk_buff *skb, struct net_device *dev,
 			dsa_header[2] &= ~0x10;
 		}
 	} else {
-		struct net_device *br = dsa_port_bridge_dev_get(dp);
 		u16 vid;
 
-		vid = br ? MV88E6XXX_VID_BRIDGED : MV88E6XXX_VID_STANDALONE;
+		vid = br_dev ? MV88E6XXX_VID_BRIDGED : MV88E6XXX_VID_STANDALONE;
 
 		skb_push(skb, DSA_HLEN + extra);
 		dsa_alloc_etype_header(skb, DSA_HLEN + extra);
@@ -246,12 +255,14 @@ static struct sk_buff *dsa_rcv_ll(struct sk_buff *skb, struct net_device *dev,
 
 	if (trunk) {
 		struct dsa_port *cpu_dp = dev->dsa_ptr;
+		struct dsa_lag *lag;
 
 		/* The exact source port is not available in the tag,
 		 * so we inject the frame directly on the upper
 		 * team/bond.
 		 */
-		skb->dev = dsa_lag_dev(cpu_dp->dst, source_port);
+		lag = dsa_lag_by_id(cpu_dp->dst, source_port + 1);
+		skb->dev = lag ? lag->dev : NULL;
 	} else {
 		skb->dev = dsa_master_find_slave(dev, source_device,
 						 source_port);
diff --git a/net/dsa/tag_ocelot_8021q.c b/net/dsa/tag_ocelot_8021q.c
index 68982b2789a5..37ccf00404ea 100644
--- a/net/dsa/tag_ocelot_8021q.c
+++ b/net/dsa/tag_ocelot_8021q.c
@@ -32,6 +32,13 @@ static struct sk_buff *ocelot_defer_xmit(struct dsa_port *dp,
 	if (!xmit_work_fn || !xmit_worker)
 		return NULL;
 
+	/* PTP over IP packets need UDP checksumming. We may have inherited
+	 * NETIF_F_HW_CSUM from the DSA master, but these packets are not sent
+	 * through the DSA master, so calculate the checksum here.
+	 */
+	if (skb->ip_summed == CHECKSUM_PARTIAL && skb_checksum_help(skb))
+		return NULL;
+
 	xmit_work = kzalloc(sizeof(*xmit_work), GFP_ATOMIC);
 	if (!xmit_work)
 		return NULL;
@@ -55,7 +62,7 @@ static struct sk_buff *ocelot_xmit(struct sk_buff *skb,
 	struct dsa_port *dp = dsa_slave_to_port(netdev);
 	u16 queue_mapping = skb_get_queue_mapping(skb);
 	u8 pcp = netdev_txq_to_tc(netdev, queue_mapping);
-	u16 tx_vid = dsa_tag_8021q_tx_vid(dp);
+	u16 tx_vid = dsa_tag_8021q_standalone_vid(dp);
 	struct ethhdr *hdr = eth_hdr(skb);
 
 	if (ocelot_ptp_rew_op(skb) || is_link_local_ether_addr(hdr->h_dest))
@@ -70,7 +77,7 @@ static struct sk_buff *ocelot_rcv(struct sk_buff *skb,
 {
 	int src_port, switch_id;
 
-	dsa_8021q_rcv(skb, &src_port, &switch_id);
+	dsa_8021q_rcv(skb, &src_port, &switch_id, NULL);
 
 	skb->dev = dsa_master_find_slave(netdev, switch_id, src_port);
 	if (!skb->dev)
diff --git a/net/dsa/tag_qca.c b/net/dsa/tag_qca.c
index 1ea9401b8ace..57d2e00f1e5d 100644
--- a/net/dsa/tag_qca.c
+++ b/net/dsa/tag_qca.c
@@ -4,30 +4,12 @@
  */
 
 #include <linux/etherdevice.h>
+#include <linux/bitfield.h>
+#include <net/dsa.h>
+#include <linux/dsa/tag_qca.h>
 
 #include "dsa_priv.h"
 
-#define QCA_HDR_LEN	2
-#define QCA_HDR_VERSION	0x2
-
-#define QCA_HDR_RECV_VERSION_MASK	GENMASK(15, 14)
-#define QCA_HDR_RECV_VERSION_S		14
-#define QCA_HDR_RECV_PRIORITY_MASK	GENMASK(13, 11)
-#define QCA_HDR_RECV_PRIORITY_S		11
-#define QCA_HDR_RECV_TYPE_MASK		GENMASK(10, 6)
-#define QCA_HDR_RECV_TYPE_S		6
-#define QCA_HDR_RECV_FRAME_IS_TAGGED	BIT(3)
-#define QCA_HDR_RECV_SOURCE_PORT_MASK	GENMASK(2, 0)
-
-#define QCA_HDR_XMIT_VERSION_MASK	GENMASK(15, 14)
-#define QCA_HDR_XMIT_VERSION_S		14
-#define QCA_HDR_XMIT_PRIORITY_MASK	GENMASK(13, 11)
-#define QCA_HDR_XMIT_PRIORITY_S		11
-#define QCA_HDR_XMIT_CONTROL_MASK	GENMASK(10, 8)
-#define QCA_HDR_XMIT_CONTROL_S		8
-#define QCA_HDR_XMIT_FROM_CPU		BIT(7)
-#define QCA_HDR_XMIT_DP_BIT_MASK	GENMASK(6, 0)
-
 static struct sk_buff *qca_tag_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct dsa_port *dp = dsa_slave_to_port(dev);
@@ -40,8 +22,9 @@ static struct sk_buff *qca_tag_xmit(struct sk_buff *skb, struct net_device *dev)
 	phdr = dsa_etype_header_pos_tx(skb);
 
 	/* Set the version field, and set destination port information */
-	hdr = QCA_HDR_VERSION << QCA_HDR_XMIT_VERSION_S |
-		QCA_HDR_XMIT_FROM_CPU | BIT(dp->index);
+	hdr = FIELD_PREP(QCA_HDR_XMIT_VERSION, QCA_HDR_VERSION);
+	hdr |= QCA_HDR_XMIT_FROM_CPU;
+	hdr |= FIELD_PREP(QCA_HDR_XMIT_DP_BIT, BIT(dp->index));
 
 	*phdr = htons(hdr);
 
@@ -50,10 +33,17 @@ static struct sk_buff *qca_tag_xmit(struct sk_buff *skb, struct net_device *dev)
 
 static struct sk_buff *qca_tag_rcv(struct sk_buff *skb, struct net_device *dev)
 {
-	u8 ver;
-	u16  hdr;
-	int port;
+	struct qca_tagger_data *tagger_data;
+	struct dsa_port *dp = dev->dsa_ptr;
+	struct dsa_switch *ds = dp->ds;
+	u8 ver, pk_type;
 	__be16 *phdr;
+	int port;
+	u16 hdr;
+
+	BUILD_BUG_ON(sizeof(struct qca_mgmt_ethhdr) != QCA_HDR_MGMT_HEADER_LEN + QCA_HDR_LEN);
+
+	tagger_data = ds->tagger_data;
 
 	if (unlikely(!pskb_may_pull(skb, QCA_HDR_LEN)))
 		return NULL;
@@ -62,16 +52,33 @@ static struct sk_buff *qca_tag_rcv(struct sk_buff *skb, struct net_device *dev)
 	hdr = ntohs(*phdr);
 
 	/* Make sure the version is correct */
-	ver = (hdr & QCA_HDR_RECV_VERSION_MASK) >> QCA_HDR_RECV_VERSION_S;
+	ver = FIELD_GET(QCA_HDR_RECV_VERSION, hdr);
 	if (unlikely(ver != QCA_HDR_VERSION))
 		return NULL;
 
+	/* Get pk type */
+	pk_type = FIELD_GET(QCA_HDR_RECV_TYPE, hdr);
+
+	/* Ethernet mgmt read/write packet */
+	if (pk_type == QCA_HDR_RECV_TYPE_RW_REG_ACK) {
+		if (likely(tagger_data->rw_reg_ack_handler))
+			tagger_data->rw_reg_ack_handler(ds, skb);
+		return NULL;
+	}
+
+	/* Ethernet MIB counter packet */
+	if (pk_type == QCA_HDR_RECV_TYPE_MIB) {
+		if (likely(tagger_data->mib_autocast_handler))
+			tagger_data->mib_autocast_handler(ds, skb);
+		return NULL;
+	}
+
 	/* Remove QCA tag and recalculate checksum */
 	skb_pull_rcsum(skb, QCA_HDR_LEN);
 	dsa_strip_etype_header(skb, QCA_HDR_LEN);
 
 	/* Get source port information */
-	port = (hdr & QCA_HDR_RECV_SOURCE_PORT_MASK);
+	port = FIELD_GET(QCA_HDR_RECV_SOURCE_PORT, hdr);
 
 	skb->dev = dsa_master_find_slave(dev, 0, port);
 	if (!skb->dev)
@@ -80,12 +87,34 @@ static struct sk_buff *qca_tag_rcv(struct sk_buff *skb, struct net_device *dev)
 	return skb;
 }
 
+static int qca_tag_connect(struct dsa_switch *ds)
+{
+	struct qca_tagger_data *tagger_data;
+
+	tagger_data = kzalloc(sizeof(*tagger_data), GFP_KERNEL);
+	if (!tagger_data)
+		return -ENOMEM;
+
+	ds->tagger_data = tagger_data;
+
+	return 0;
+}
+
+static void qca_tag_disconnect(struct dsa_switch *ds)
+{
+	kfree(ds->tagger_data);
+	ds->tagger_data = NULL;
+}
+
 static const struct dsa_device_ops qca_netdev_ops = {
 	.name	= "qca",
 	.proto	= DSA_TAG_PROTO_QCA,
+	.connect = qca_tag_connect,
+	.disconnect = qca_tag_disconnect,
 	.xmit	= qca_tag_xmit,
 	.rcv	= qca_tag_rcv,
 	.needed_headroom = QCA_HDR_LEN,
+	.promisc_on_master = true,
 };
 
 MODULE_LICENSE("GPL");
diff --git a/net/dsa/tag_rtl8_4.c b/net/dsa/tag_rtl8_4.c
index 02686ad4045d..a593ead7ff26 100644
--- a/net/dsa/tag_rtl8_4.c
+++ b/net/dsa/tag_rtl8_4.c
@@ -7,13 +7,8 @@
  * NOTE: Currently only supports protocol "4" found in the RTL8365MB, hence
  * named tag_rtl8_4.
  *
- * This tag header has the following format:
+ * This tag has the following format:
  *
- *  -------------------------------------------
- *  | MAC DA | MAC SA | 8 byte tag | Type | ...
- *  -------------------------------------------
- *     _______________/            \______________________________________
- *    /                                                                   \
  *  0                                  7|8                                 15
  *  |-----------------------------------+-----------------------------------|---
  *  |                               (16-bit)                                | ^
@@ -58,6 +53,24 @@
  *    TX/RX      | TX (switch->CPU): port number the packet was received on
  *               | RX (CPU->switch): forwarding port mask (if ALLOW=0)
  *               |                   allowance port mask (if ALLOW=1)
+ *
+ * The tag can be positioned before Ethertype, using tag "rtl8_4":
+ *
+ *  +--------+--------+------------+------+-----
+ *  | MAC DA | MAC SA | 8 byte tag | Type | ...
+ *  +--------+--------+------------+------+-----
+ *
+ * The tag can also appear between the end of the payload and before the CRC,
+ * using tag "rtl8_4t":
+ *
+ * +--------+--------+------+-----+---------+------------+-----+
+ * | MAC DA | MAC SA | TYPE | ... | payload | 8-byte tag | CRC |
+ * +--------+--------+------+-----+---------+------------+-----+
+ *
+ * The added bytes after the payload will break most checksums, either in
+ * software or hardware. To avoid this issue, if the checksum is still pending,
+ * this tagger checksums the packet in software before adding the tag.
+ *
  */
 
 #include <linux/bitfield.h>
@@ -84,87 +97,133 @@
 #define RTL8_4_TX			GENMASK(3, 0)
 #define RTL8_4_RX			GENMASK(10, 0)
 
-static struct sk_buff *rtl8_4_tag_xmit(struct sk_buff *skb,
-				       struct net_device *dev)
+static void rtl8_4_write_tag(struct sk_buff *skb, struct net_device *dev,
+			     void *tag)
 {
 	struct dsa_port *dp = dsa_slave_to_port(dev);
-	__be16 *tag;
-
-	skb_push(skb, RTL8_4_TAG_LEN);
-
-	dsa_alloc_etype_header(skb, RTL8_4_TAG_LEN);
-	tag = dsa_etype_header_pos_tx(skb);
+	__be16 tag16[RTL8_4_TAG_LEN / 2];
 
 	/* Set Realtek EtherType */
-	tag[0] = htons(ETH_P_REALTEK);
+	tag16[0] = htons(ETH_P_REALTEK);
 
 	/* Set Protocol; zero REASON */
-	tag[1] = htons(FIELD_PREP(RTL8_4_PROTOCOL, RTL8_4_PROTOCOL_RTL8365MB));
+	tag16[1] = htons(FIELD_PREP(RTL8_4_PROTOCOL, RTL8_4_PROTOCOL_RTL8365MB));
 
 	/* Zero FID_EN, FID, PRI_EN, PRI, KEEP; set LEARN_DIS */
-	tag[2] = htons(FIELD_PREP(RTL8_4_LEARN_DIS, 1));
+	tag16[2] = htons(FIELD_PREP(RTL8_4_LEARN_DIS, 1));
 
 	/* Zero ALLOW; set RX (CPU->switch) forwarding port mask */
-	tag[3] = htons(FIELD_PREP(RTL8_4_RX, BIT(dp->index)));
+	tag16[3] = htons(FIELD_PREP(RTL8_4_RX, BIT(dp->index)));
+
+	memcpy(tag, tag16, RTL8_4_TAG_LEN);
+}
+
+static struct sk_buff *rtl8_4_tag_xmit(struct sk_buff *skb,
+				       struct net_device *dev)
+{
+	skb_push(skb, RTL8_4_TAG_LEN);
+
+	dsa_alloc_etype_header(skb, RTL8_4_TAG_LEN);
+
+	rtl8_4_write_tag(skb, dev, dsa_etype_header_pos_tx(skb));
 
 	return skb;
 }
 
-static struct sk_buff *rtl8_4_tag_rcv(struct sk_buff *skb,
-				      struct net_device *dev)
+static struct sk_buff *rtl8_4t_tag_xmit(struct sk_buff *skb,
+					struct net_device *dev)
+{
+	/* Calculate the checksum here if not done yet as trailing tags will
+	 * break either software or hardware based checksum
+	 */
+	if (skb->ip_summed == CHECKSUM_PARTIAL && skb_checksum_help(skb))
+		return NULL;
+
+	rtl8_4_write_tag(skb, dev, skb_put(skb, RTL8_4_TAG_LEN));
+
+	return skb;
+}
+
+static int rtl8_4_read_tag(struct sk_buff *skb, struct net_device *dev,
+			   void *tag)
 {
-	__be16 *tag;
+	__be16 tag16[RTL8_4_TAG_LEN / 2];
 	u16 etype;
 	u8 reason;
 	u8 proto;
 	u8 port;
 
-	if (unlikely(!pskb_may_pull(skb, RTL8_4_TAG_LEN)))
-		return NULL;
-
-	tag = dsa_etype_header_pos_rx(skb);
+	memcpy(tag16, tag, RTL8_4_TAG_LEN);
 
 	/* Parse Realtek EtherType */
-	etype = ntohs(tag[0]);
+	etype = ntohs(tag16[0]);
 	if (unlikely(etype != ETH_P_REALTEK)) {
 		dev_warn_ratelimited(&dev->dev,
 				     "non-realtek ethertype 0x%04x\n", etype);
-		return NULL;
+		return -EPROTO;
 	}
 
 	/* Parse Protocol */
-	proto = FIELD_GET(RTL8_4_PROTOCOL, ntohs(tag[1]));
+	proto = FIELD_GET(RTL8_4_PROTOCOL, ntohs(tag16[1]));
 	if (unlikely(proto != RTL8_4_PROTOCOL_RTL8365MB)) {
 		dev_warn_ratelimited(&dev->dev,
 				     "unknown realtek protocol 0x%02x\n",
 				     proto);
-		return NULL;
+		return -EPROTO;
 	}
 
 	/* Parse REASON */
-	reason = FIELD_GET(RTL8_4_REASON, ntohs(tag[1]));
+	reason = FIELD_GET(RTL8_4_REASON, ntohs(tag16[1]));
 
 	/* Parse TX (switch->CPU) */
-	port = FIELD_GET(RTL8_4_TX, ntohs(tag[3]));
+	port = FIELD_GET(RTL8_4_TX, ntohs(tag16[3]));
 	skb->dev = dsa_master_find_slave(dev, 0, port);
 	if (!skb->dev) {
 		dev_warn_ratelimited(&dev->dev,
 				     "could not find slave for port %d\n",
 				     port);
-		return NULL;
+		return -ENOENT;
 	}
 
+	if (reason != RTL8_4_REASON_TRAP)
+		dsa_default_offload_fwd_mark(skb);
+
+	return 0;
+}
+
+static struct sk_buff *rtl8_4_tag_rcv(struct sk_buff *skb,
+				      struct net_device *dev)
+{
+	if (unlikely(!pskb_may_pull(skb, RTL8_4_TAG_LEN)))
+		return NULL;
+
+	if (unlikely(rtl8_4_read_tag(skb, dev, dsa_etype_header_pos_rx(skb))))
+		return NULL;
+
 	/* Remove tag and recalculate checksum */
 	skb_pull_rcsum(skb, RTL8_4_TAG_LEN);
 
 	dsa_strip_etype_header(skb, RTL8_4_TAG_LEN);
 
-	if (reason != RTL8_4_REASON_TRAP)
-		dsa_default_offload_fwd_mark(skb);
+	return skb;
+}
+
+static struct sk_buff *rtl8_4t_tag_rcv(struct sk_buff *skb,
+				       struct net_device *dev)
+{
+	if (skb_linearize(skb))
+		return NULL;
+
+	if (unlikely(rtl8_4_read_tag(skb, dev, skb_tail_pointer(skb) - RTL8_4_TAG_LEN)))
+		return NULL;
+
+	if (pskb_trim_rcsum(skb, skb->len - RTL8_4_TAG_LEN))
+		return NULL;
 
 	return skb;
 }
 
+/* Ethertype version */
 static const struct dsa_device_ops rtl8_4_netdev_ops = {
 	.name = "rtl8_4",
 	.proto = DSA_TAG_PROTO_RTL8_4,
@@ -172,7 +231,28 @@ static const struct dsa_device_ops rtl8_4_netdev_ops = {
 	.rcv = rtl8_4_tag_rcv,
 	.needed_headroom = RTL8_4_TAG_LEN,
 };
-module_dsa_tag_driver(rtl8_4_netdev_ops);
 
-MODULE_LICENSE("GPL");
+DSA_TAG_DRIVER(rtl8_4_netdev_ops);
+
 MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_RTL8_4);
+
+/* Tail version */
+static const struct dsa_device_ops rtl8_4t_netdev_ops = {
+	.name = "rtl8_4t",
+	.proto = DSA_TAG_PROTO_RTL8_4T,
+	.xmit = rtl8_4t_tag_xmit,
+	.rcv = rtl8_4t_tag_rcv,
+	.needed_tailroom = RTL8_4_TAG_LEN,
+};
+
+DSA_TAG_DRIVER(rtl8_4t_netdev_ops);
+
+MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_RTL8_4T);
+
+static struct dsa_tag_driver *dsa_tag_drivers[] = {
+	&DSA_TAG_DRIVER_NAME(rtl8_4_netdev_ops),
+	&DSA_TAG_DRIVER_NAME(rtl8_4t_netdev_ops),
+};
+module_dsa_tag_drivers(dsa_tag_drivers);
+
+MODULE_LICENSE("GPL");
diff --git a/net/dsa/tag_sja1105.c b/net/dsa/tag_sja1105.c
index 72d5e0ef8dcf..83e4136516b0 100644
--- a/net/dsa/tag_sja1105.c
+++ b/net/dsa/tag_sja1105.c
@@ -226,7 +226,7 @@ static struct sk_buff *sja1105_imprecise_xmit(struct sk_buff *skb,
 	 * TX VLAN that targets the bridge's entire broadcast domain,
 	 * instead of just the specific port.
 	 */
-	tx_vid = dsa_8021q_bridge_tx_fwd_offload_vid(bridge_num);
+	tx_vid = dsa_tag_8021q_bridge_vid(bridge_num);
 
 	return dsa_8021q_xmit(skb, netdev, sja1105_xmit_tpid(dp), tx_vid);
 }
@@ -267,7 +267,7 @@ static struct sk_buff *sja1105_xmit(struct sk_buff *skb,
 	struct dsa_port *dp = dsa_slave_to_port(netdev);
 	u16 queue_mapping = skb_get_queue_mapping(skb);
 	u8 pcp = netdev_txq_to_tc(netdev, queue_mapping);
-	u16 tx_vid = dsa_tag_8021q_tx_vid(dp);
+	u16 tx_vid = dsa_tag_8021q_standalone_vid(dp);
 
 	if (skb->offload_fwd_mark)
 		return sja1105_imprecise_xmit(skb, netdev);
@@ -295,7 +295,7 @@ static struct sk_buff *sja1110_xmit(struct sk_buff *skb,
 	struct dsa_port *dp = dsa_slave_to_port(netdev);
 	u16 queue_mapping = skb_get_queue_mapping(skb);
 	u8 pcp = netdev_txq_to_tc(netdev, queue_mapping);
-	u16 tx_vid = dsa_tag_8021q_tx_vid(dp);
+	u16 tx_vid = dsa_tag_8021q_standalone_vid(dp);
 	__be32 *tx_trailer;
 	__be16 *tx_header;
 	int trailer_pos;
@@ -509,7 +509,7 @@ static bool sja1110_skb_has_inband_control_extension(const struct sk_buff *skb)
  * packet.
  */
 static void sja1105_vlan_rcv(struct sk_buff *skb, int *source_port,
-			     int *switch_id, u16 *vid)
+			     int *switch_id, int *vbid, u16 *vid)
 {
 	struct vlan_ethhdr *hdr = (struct vlan_ethhdr *)skb_mac_header(skb);
 	u16 vlan_tci;
@@ -519,8 +519,8 @@ static void sja1105_vlan_rcv(struct sk_buff *skb, int *source_port,
 	else
 		vlan_tci = ntohs(hdr->h_vlan_TCI);
 
-	if (vid_is_dsa_8021q_rxvlan(vlan_tci & VLAN_VID_MASK))
-		return dsa_8021q_rcv(skb, source_port, switch_id);
+	if (vid_is_dsa_8021q(vlan_tci & VLAN_VID_MASK))
+		return dsa_8021q_rcv(skb, source_port, switch_id, vbid);
 
 	/* Try our best with imprecise RX */
 	*vid = vlan_tci & VLAN_VID_MASK;
@@ -529,7 +529,7 @@ static void sja1105_vlan_rcv(struct sk_buff *skb, int *source_port,
 static struct sk_buff *sja1105_rcv(struct sk_buff *skb,
 				   struct net_device *netdev)
 {
-	int source_port = -1, switch_id = -1;
+	int source_port = -1, switch_id = -1, vbid = -1;
 	struct sja1105_meta meta = {0};
 	struct ethhdr *hdr;
 	bool is_link_local;
@@ -542,7 +542,7 @@ static struct sk_buff *sja1105_rcv(struct sk_buff *skb,
 
 	if (sja1105_skb_has_tag_8021q(skb)) {
 		/* Normal traffic path. */
-		sja1105_vlan_rcv(skb, &source_port, &switch_id, &vid);
+		sja1105_vlan_rcv(skb, &source_port, &switch_id, &vbid, &vid);
 	} else if (is_link_local) {
 		/* Management traffic path. Switch embeds the switch ID and
 		 * port ID into bytes of the destination MAC, courtesy of
@@ -561,7 +561,9 @@ static struct sk_buff *sja1105_rcv(struct sk_buff *skb,
 		return NULL;
 	}
 
-	if (source_port == -1 || switch_id == -1)
+	if (vbid >= 1)
+		skb->dev = dsa_tag_8021q_find_port_by_vbid(netdev, vbid);
+	else if (source_port == -1 || switch_id == -1)
 		skb->dev = dsa_find_designated_bridge_port_by_vid(netdev, vid);
 	else
 		skb->dev = dsa_master_find_slave(netdev, switch_id, source_port);
@@ -686,7 +688,7 @@ static struct sk_buff *sja1110_rcv_inband_control_extension(struct sk_buff *skb,
 static struct sk_buff *sja1110_rcv(struct sk_buff *skb,
 				   struct net_device *netdev)
 {
-	int source_port = -1, switch_id = -1;
+	int source_port = -1, switch_id = -1, vbid = -1;
 	bool host_only = false;
 	u16 vid = 0;
 
@@ -700,9 +702,11 @@ static struct sk_buff *sja1110_rcv(struct sk_buff *skb,
 
 	/* Packets with in-band control extensions might still have RX VLANs */
 	if (likely(sja1105_skb_has_tag_8021q(skb)))
-		sja1105_vlan_rcv(skb, &source_port, &switch_id, &vid);
+		sja1105_vlan_rcv(skb, &source_port, &switch_id, &vbid, &vid);
 
-	if (source_port == -1 || switch_id == -1)
+	if (vbid >= 1)
+		skb->dev = dsa_tag_8021q_find_port_by_vbid(netdev, vbid);
+	else if (source_port == -1 || switch_id == -1)
 		skb->dev = dsa_find_designated_bridge_port_by_vid(netdev, vid);
 	else
 		skb->dev = dsa_master_find_slave(netdev, switch_id, source_port);
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 75856db299e9..29d01662a48b 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -363,7 +363,7 @@ extern const struct nla_policy ethnl_features_set_policy[ETHTOOL_A_FEATURES_WANT
 extern const struct nla_policy ethnl_privflags_get_policy[ETHTOOL_A_PRIVFLAGS_HEADER + 1];
 extern const struct nla_policy ethnl_privflags_set_policy[ETHTOOL_A_PRIVFLAGS_FLAGS + 1];
 extern const struct nla_policy ethnl_rings_get_policy[ETHTOOL_A_RINGS_HEADER + 1];
-extern const struct nla_policy ethnl_rings_set_policy[ETHTOOL_A_RINGS_RX_BUF_LEN + 1];
+extern const struct nla_policy ethnl_rings_set_policy[ETHTOOL_A_RINGS_CQE_SIZE + 1];
 extern const struct nla_policy ethnl_channels_get_policy[ETHTOOL_A_CHANNELS_HEADER + 1];
 extern const struct nla_policy ethnl_channels_set_policy[ETHTOOL_A_CHANNELS_COMBINED_COUNT + 1];
 extern const struct nla_policy ethnl_coalesce_get_policy[ETHTOOL_A_COALESCE_HEADER + 1];
diff --git a/net/ethtool/rings.c b/net/ethtool/rings.c
index c1d5f5e0fdc9..9f33c9689b56 100644
--- a/net/ethtool/rings.c
+++ b/net/ethtool/rings.c
@@ -53,7 +53,9 @@ static int rings_reply_size(const struct ethnl_req_info *req_base,
 	       nla_total_size(sizeof(u32)) +	/* _RINGS_RX_MINI */
 	       nla_total_size(sizeof(u32)) +	/* _RINGS_RX_JUMBO */
 	       nla_total_size(sizeof(u32)) +	/* _RINGS_TX */
-	       nla_total_size(sizeof(u32));     /* _RINGS_RX_BUF_LEN */
+	       nla_total_size(sizeof(u32)) +	/* _RINGS_RX_BUF_LEN */
+	       nla_total_size(sizeof(u8))  +	/* _RINGS_TCP_DATA_SPLIT */
+	       nla_total_size(sizeof(u32));	/* _RINGS_CQE_SIZE */
 }
 
 static int rings_fill_reply(struct sk_buff *skb,
@@ -61,9 +63,11 @@ static int rings_fill_reply(struct sk_buff *skb,
 			    const struct ethnl_reply_data *reply_base)
 {
 	const struct rings_reply_data *data = RINGS_REPDATA(reply_base);
-	const struct kernel_ethtool_ringparam *kernel_ringparam = &data->kernel_ringparam;
+	const struct kernel_ethtool_ringparam *kr = &data->kernel_ringparam;
 	const struct ethtool_ringparam *ringparam = &data->ringparam;
 
+	WARN_ON(kr->tcp_data_split > ETHTOOL_TCP_DATA_SPLIT_ENABLED);
+
 	if ((ringparam->rx_max_pending &&
 	     (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MAX,
 			  ringparam->rx_max_pending) ||
@@ -84,9 +88,13 @@ static int rings_fill_reply(struct sk_buff *skb,
 			  ringparam->tx_max_pending) ||
 	      nla_put_u32(skb, ETHTOOL_A_RINGS_TX,
 			  ringparam->tx_pending)))  ||
-	    (kernel_ringparam->rx_buf_len &&
-	     (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_BUF_LEN,
-			  kernel_ringparam->rx_buf_len))))
+	    (kr->rx_buf_len &&
+	     (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_BUF_LEN, kr->rx_buf_len))) ||
+	    (kr->tcp_data_split &&
+	     (nla_put_u8(skb, ETHTOOL_A_RINGS_TCP_DATA_SPLIT,
+			 kr->tcp_data_split))) ||
+	    (kr->cqe_size &&
+	     (nla_put_u32(skb, ETHTOOL_A_RINGS_CQE_SIZE, kr->cqe_size))))
 		return -EMSGSIZE;
 
 	return 0;
@@ -114,6 +122,7 @@ const struct nla_policy ethnl_rings_set_policy[] = {
 	[ETHTOOL_A_RINGS_RX_JUMBO]		= { .type = NLA_U32 },
 	[ETHTOOL_A_RINGS_TX]			= { .type = NLA_U32 },
 	[ETHTOOL_A_RINGS_RX_BUF_LEN]            = NLA_POLICY_MIN(NLA_U32, 1),
+	[ETHTOOL_A_RINGS_CQE_SIZE]		= NLA_POLICY_MIN(NLA_U32, 1),
 };
 
 int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info)
@@ -154,6 +163,8 @@ int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info)
 	ethnl_update_u32(&ringparam.tx_pending, tb[ETHTOOL_A_RINGS_TX], &mod);
 	ethnl_update_u32(&kernel_ringparam.rx_buf_len,
 			 tb[ETHTOOL_A_RINGS_RX_BUF_LEN], &mod);
+	ethnl_update_u32(&kernel_ringparam.cqe_size,
+			 tb[ETHTOOL_A_RINGS_CQE_SIZE], &mod);
 	ret = 0;
 	if (!mod)
 		goto out_ops;
@@ -185,6 +196,15 @@ int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info)
 		goto out_ops;
 	}
 
+	if (kernel_ringparam.cqe_size &&
+	    !(ops->supported_ring_params & ETHTOOL_RING_USE_CQE_SIZE)) {
+		ret = -EOPNOTSUPP;
+		NL_SET_ERR_MSG_ATTR(info->extack,
+				    tb[ETHTOOL_A_RINGS_CQE_SIZE],
+				    "setting cqe size not supported");
+		goto out_ops;
+	}
+
 	ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
 					      &kernel_ringparam, info->extack);
 	if (ret < 0)
diff --git a/net/hsr/hsr_debugfs.c b/net/hsr/hsr_debugfs.c
index 99f3af1a9d4d..fe6094e9a2db 100644
--- a/net/hsr/hsr_debugfs.c
+++ b/net/hsr/hsr_debugfs.c
@@ -17,6 +17,7 @@
 #include <linux/module.h>
 #include <linux/errno.h>
 #include <linux/debugfs.h>
+#include <linux/jhash.h>
 #include "hsr_main.h"
 #include "hsr_framereg.h"
 
@@ -28,6 +29,7 @@ hsr_node_table_show(struct seq_file *sfp, void *data)
 {
 	struct hsr_priv *priv = (struct hsr_priv *)sfp->private;
 	struct hsr_node *node;
+	int i;
 
 	seq_printf(sfp, "Node Table entries for (%s) device\n",
 		   (priv->prot_version == PRP_V1 ? "PRP" : "HSR"));
@@ -39,22 +41,28 @@ hsr_node_table_show(struct seq_file *sfp, void *data)
 		seq_puts(sfp, "DAN-H\n");
 
 	rcu_read_lock();
-	list_for_each_entry_rcu(node, &priv->node_db, mac_list) {
-		/* skip self node */
-		if (hsr_addr_is_self(priv, node->macaddress_A))
-			continue;
-		seq_printf(sfp, "%pM ", &node->macaddress_A[0]);
-		seq_printf(sfp, "%pM ", &node->macaddress_B[0]);
-		seq_printf(sfp, "%10lx, ", node->time_in[HSR_PT_SLAVE_A]);
-		seq_printf(sfp, "%10lx, ", node->time_in[HSR_PT_SLAVE_B]);
-		seq_printf(sfp, "%14x, ", node->addr_B_port);
-
-		if (priv->prot_version == PRP_V1)
-			seq_printf(sfp, "%5x, %5x, %5x\n",
-				   node->san_a, node->san_b,
-				   (node->san_a == 0 && node->san_b == 0));
-		else
-			seq_printf(sfp, "%5x\n", 1);
+
+	for (i = 0 ; i < priv->hash_buckets; i++) {
+		hlist_for_each_entry_rcu(node, &priv->node_db[i], mac_list) {
+			/* skip self node */
+			if (hsr_addr_is_self(priv, node->macaddress_A))
+				continue;
+			seq_printf(sfp, "%pM ", &node->macaddress_A[0]);
+			seq_printf(sfp, "%pM ", &node->macaddress_B[0]);
+			seq_printf(sfp, "%10lx, ",
+				   node->time_in[HSR_PT_SLAVE_A]);
+			seq_printf(sfp, "%10lx, ",
+				   node->time_in[HSR_PT_SLAVE_B]);
+			seq_printf(sfp, "%14x, ", node->addr_B_port);
+
+			if (priv->prot_version == PRP_V1)
+				seq_printf(sfp, "%5x, %5x, %5x\n",
+					   node->san_a, node->san_b,
+					   (node->san_a == 0 &&
+					    node->san_b == 0));
+			else
+				seq_printf(sfp, "%5x\n", 1);
+		}
 	}
 	rcu_read_unlock();
 	return 0;
diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c
index e57fdad9ef94..6ffef47e9be5 100644
--- a/net/hsr/hsr_device.c
+++ b/net/hsr/hsr_device.c
@@ -221,7 +221,7 @@ static netdev_tx_t hsr_dev_xmit(struct sk_buff *skb, struct net_device *dev)
 		skb_reset_mac_len(skb);
 		hsr_forward_skb(skb, master);
 	} else {
-		atomic_long_inc(&dev->tx_dropped);
+		dev_core_stats_tx_dropped_inc(dev);
 		dev_kfree_skb_any(skb);
 	}
 	return NETDEV_TX_OK;
@@ -485,12 +485,16 @@ int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2],
 {
 	bool unregister = false;
 	struct hsr_priv *hsr;
-	int res;
+	int res, i;
 
 	hsr = netdev_priv(hsr_dev);
 	INIT_LIST_HEAD(&hsr->ports);
-	INIT_LIST_HEAD(&hsr->node_db);
-	INIT_LIST_HEAD(&hsr->self_node_db);
+	INIT_HLIST_HEAD(&hsr->self_node_db);
+	hsr->hash_buckets = HSR_HSIZE;
+	get_random_bytes(&hsr->hash_seed, sizeof(hsr->hash_seed));
+	for (i = 0; i < hsr->hash_buckets; i++)
+		INIT_HLIST_HEAD(&hsr->node_db[i]);
+
 	spin_lock_init(&hsr->list_lock);
 
 	eth_hw_addr_set(hsr_dev, slave[0]->dev_addr);
diff --git a/net/hsr/hsr_forward.c b/net/hsr/hsr_forward.c
index e59cbb4f0cd1..5bf357734b11 100644
--- a/net/hsr/hsr_forward.c
+++ b/net/hsr/hsr_forward.c
@@ -570,20 +570,23 @@ static int fill_frame_info(struct hsr_frame_info *frame,
 	struct ethhdr *ethhdr;
 	__be16 proto;
 	int ret;
+	u32 hash;
 
 	/* Check if skb contains ethhdr */
 	if (skb->mac_len < sizeof(struct ethhdr))
 		return -EINVAL;
 
 	memset(frame, 0, sizeof(*frame));
+
+	ethhdr = (struct ethhdr *)skb_mac_header(skb);
+	hash = hsr_mac_hash(port->hsr, ethhdr->h_source);
 	frame->is_supervision = is_supervision_frame(port->hsr, skb);
-	frame->node_src = hsr_get_node(port, &hsr->node_db, skb,
+	frame->node_src = hsr_get_node(port, &hsr->node_db[hash], skb,
 				       frame->is_supervision,
 				       port->type);
 	if (!frame->node_src)
 		return -1; /* Unknown node and !is_supervision, or no mem */
 
-	ethhdr = (struct ethhdr *)skb_mac_header(skb);
 	frame->is_vlan = false;
 	proto = ethhdr->h_proto;
 
diff --git a/net/hsr/hsr_framereg.c b/net/hsr/hsr_framereg.c
index 0775f0f95dbf..584e21788799 100644
--- a/net/hsr/hsr_framereg.c
+++ b/net/hsr/hsr_framereg.c
@@ -15,11 +15,36 @@
 #include <linux/etherdevice.h>
 #include <linux/slab.h>
 #include <linux/rculist.h>
+#include <linux/jhash.h>
 #include "hsr_main.h"
 #include "hsr_framereg.h"
 #include "hsr_netlink.h"
 
-/*	TODO: use hash lists for mac addresses (linux/jhash.h)?    */
+#ifdef CONFIG_LOCKDEP
+int lockdep_hsr_is_held(spinlock_t *lock)
+{
+	return lockdep_is_held(lock);
+}
+#endif
+
+u32 hsr_mac_hash(struct hsr_priv *hsr, const unsigned char *addr)
+{
+	u32 hash = jhash(addr, ETH_ALEN, hsr->hash_seed);
+
+	return reciprocal_scale(hash, hsr->hash_buckets);
+}
+
+struct hsr_node *hsr_node_get_first(struct hlist_head *head, spinlock_t *lock)
+{
+	struct hlist_node *first;
+
+	first = rcu_dereference_bh_check(hlist_first_rcu(head),
+					 lockdep_hsr_is_held(lock));
+	if (first)
+		return hlist_entry(first, struct hsr_node, mac_list);
+
+	return NULL;
+}
 
 /* seq_nr_after(a, b) - return true if a is after (higher in sequence than) b,
  * false otherwise.
@@ -42,8 +67,7 @@ bool hsr_addr_is_self(struct hsr_priv *hsr, unsigned char *addr)
 {
 	struct hsr_node *node;
 
-	node = list_first_or_null_rcu(&hsr->self_node_db, struct hsr_node,
-				      mac_list);
+	node = hsr_node_get_first(&hsr->self_node_db, &hsr->list_lock);
 	if (!node) {
 		WARN_ONCE(1, "HSR: No self node\n");
 		return false;
@@ -59,12 +83,12 @@ bool hsr_addr_is_self(struct hsr_priv *hsr, unsigned char *addr)
 
 /* Search for mac entry. Caller must hold rcu read lock.
  */
-static struct hsr_node *find_node_by_addr_A(struct list_head *node_db,
+static struct hsr_node *find_node_by_addr_A(struct hlist_head *node_db,
 					    const unsigned char addr[ETH_ALEN])
 {
 	struct hsr_node *node;
 
-	list_for_each_entry_rcu(node, node_db, mac_list) {
+	hlist_for_each_entry_rcu(node, node_db, mac_list) {
 		if (ether_addr_equal(node->macaddress_A, addr))
 			return node;
 	}
@@ -79,7 +103,7 @@ int hsr_create_self_node(struct hsr_priv *hsr,
 			 const unsigned char addr_a[ETH_ALEN],
 			 const unsigned char addr_b[ETH_ALEN])
 {
-	struct list_head *self_node_db = &hsr->self_node_db;
+	struct hlist_head *self_node_db = &hsr->self_node_db;
 	struct hsr_node *node, *oldnode;
 
 	node = kmalloc(sizeof(*node), GFP_KERNEL);
@@ -90,14 +114,13 @@ int hsr_create_self_node(struct hsr_priv *hsr,
 	ether_addr_copy(node->macaddress_B, addr_b);
 
 	spin_lock_bh(&hsr->list_lock);
-	oldnode = list_first_or_null_rcu(self_node_db,
-					 struct hsr_node, mac_list);
+	oldnode = hsr_node_get_first(self_node_db, &hsr->list_lock);
 	if (oldnode) {
-		list_replace_rcu(&oldnode->mac_list, &node->mac_list);
+		hlist_replace_rcu(&oldnode->mac_list, &node->mac_list);
 		spin_unlock_bh(&hsr->list_lock);
 		kfree_rcu(oldnode, rcu_head);
 	} else {
-		list_add_tail_rcu(&node->mac_list, self_node_db);
+		hlist_add_tail_rcu(&node->mac_list, self_node_db);
 		spin_unlock_bh(&hsr->list_lock);
 	}
 
@@ -106,25 +129,25 @@ int hsr_create_self_node(struct hsr_priv *hsr,
 
 void hsr_del_self_node(struct hsr_priv *hsr)
 {
-	struct list_head *self_node_db = &hsr->self_node_db;
+	struct hlist_head *self_node_db = &hsr->self_node_db;
 	struct hsr_node *node;
 
 	spin_lock_bh(&hsr->list_lock);
-	node = list_first_or_null_rcu(self_node_db, struct hsr_node, mac_list);
+	node = hsr_node_get_first(self_node_db, &hsr->list_lock);
 	if (node) {
-		list_del_rcu(&node->mac_list);
+		hlist_del_rcu(&node->mac_list);
 		kfree_rcu(node, rcu_head);
 	}
 	spin_unlock_bh(&hsr->list_lock);
 }
 
-void hsr_del_nodes(struct list_head *node_db)
+void hsr_del_nodes(struct hlist_head *node_db)
 {
 	struct hsr_node *node;
-	struct hsr_node *tmp;
+	struct hlist_node *tmp;
 
-	list_for_each_entry_safe(node, tmp, node_db, mac_list)
-		kfree(node);
+	hlist_for_each_entry_safe(node, tmp, node_db, mac_list)
+		kfree_rcu(node, rcu_head);
 }
 
 void prp_handle_san_frame(bool san, enum hsr_port_type port,
@@ -145,7 +168,7 @@ void prp_handle_san_frame(bool san, enum hsr_port_type port,
  * originating from the newly added node.
  */
 static struct hsr_node *hsr_add_node(struct hsr_priv *hsr,
-				     struct list_head *node_db,
+				     struct hlist_head *node_db,
 				     unsigned char addr[],
 				     u16 seq_out, bool san,
 				     enum hsr_port_type rx_port)
@@ -175,14 +198,14 @@ static struct hsr_node *hsr_add_node(struct hsr_priv *hsr,
 		hsr->proto_ops->handle_san_frame(san, rx_port, new_node);
 
 	spin_lock_bh(&hsr->list_lock);
-	list_for_each_entry_rcu(node, node_db, mac_list,
-				lockdep_is_held(&hsr->list_lock)) {
+	hlist_for_each_entry_rcu(node, node_db, mac_list,
+				 lockdep_hsr_is_held(&hsr->list_lock)) {
 		if (ether_addr_equal(node->macaddress_A, addr))
 			goto out;
 		if (ether_addr_equal(node->macaddress_B, addr))
 			goto out;
 	}
-	list_add_tail_rcu(&new_node->mac_list, node_db);
+	hlist_add_tail_rcu(&new_node->mac_list, node_db);
 	spin_unlock_bh(&hsr->list_lock);
 	return new_node;
 out:
@@ -202,7 +225,7 @@ void prp_update_san_info(struct hsr_node *node, bool is_sup)
 
 /* Get the hsr_node from which 'skb' was sent.
  */
-struct hsr_node *hsr_get_node(struct hsr_port *port, struct list_head *node_db,
+struct hsr_node *hsr_get_node(struct hsr_port *port, struct hlist_head *node_db,
 			      struct sk_buff *skb, bool is_sup,
 			      enum hsr_port_type rx_port)
 {
@@ -218,7 +241,7 @@ struct hsr_node *hsr_get_node(struct hsr_port *port, struct list_head *node_db,
 
 	ethhdr = (struct ethhdr *)skb_mac_header(skb);
 
-	list_for_each_entry_rcu(node, node_db, mac_list) {
+	hlist_for_each_entry_rcu(node, node_db, mac_list) {
 		if (ether_addr_equal(node->macaddress_A, ethhdr->h_source)) {
 			if (hsr->proto_ops->update_san_info)
 				hsr->proto_ops->update_san_info(node, is_sup);
@@ -268,11 +291,12 @@ void hsr_handle_sup_frame(struct hsr_frame_info *frame)
 	struct hsr_sup_tlv *hsr_sup_tlv;
 	struct hsr_node *node_real;
 	struct sk_buff *skb = NULL;
-	struct list_head *node_db;
+	struct hlist_head *node_db;
 	struct ethhdr *ethhdr;
 	int i;
 	unsigned int pull_size = 0;
 	unsigned int total_pull_size = 0;
+	u32 hash;
 
 	/* Here either frame->skb_hsr or frame->skb_prp should be
 	 * valid as supervision frame always will have protocol
@@ -310,11 +334,13 @@ void hsr_handle_sup_frame(struct hsr_frame_info *frame)
 	hsr_sp = (struct hsr_sup_payload *)skb->data;
 
 	/* Merge node_curr (registered on macaddress_B) into node_real */
-	node_db = &port_rcv->hsr->node_db;
-	node_real = find_node_by_addr_A(node_db, hsr_sp->macaddress_A);
+	node_db = port_rcv->hsr->node_db;
+	hash = hsr_mac_hash(hsr, hsr_sp->macaddress_A);
+	node_real = find_node_by_addr_A(&node_db[hash], hsr_sp->macaddress_A);
 	if (!node_real)
 		/* No frame received from AddrA of this node yet */
-		node_real = hsr_add_node(hsr, node_db, hsr_sp->macaddress_A,
+		node_real = hsr_add_node(hsr, &node_db[hash],
+					 hsr_sp->macaddress_A,
 					 HSR_SEQNR_START - 1, true,
 					 port_rcv->type);
 	if (!node_real)
@@ -348,7 +374,8 @@ void hsr_handle_sup_frame(struct hsr_frame_info *frame)
 		hsr_sp = (struct hsr_sup_payload *)skb->data;
 
 		/* Check if redbox mac and node mac are equal. */
-		if (!ether_addr_equal(node_real->macaddress_A, hsr_sp->macaddress_A)) {
+		if (!ether_addr_equal(node_real->macaddress_A,
+				      hsr_sp->macaddress_A)) {
 			/* This is a redbox supervision frame for a VDAN! */
 			goto done;
 		}
@@ -368,7 +395,7 @@ void hsr_handle_sup_frame(struct hsr_frame_info *frame)
 	node_real->addr_B_port = port_rcv->type;
 
 	spin_lock_bh(&hsr->list_lock);
-	list_del_rcu(&node_curr->mac_list);
+	hlist_del_rcu(&node_curr->mac_list);
 	spin_unlock_bh(&hsr->list_lock);
 	kfree_rcu(node_curr, rcu_head);
 
@@ -406,6 +433,7 @@ void hsr_addr_subst_dest(struct hsr_node *node_src, struct sk_buff *skb,
 			 struct hsr_port *port)
 {
 	struct hsr_node *node_dst;
+	u32 hash;
 
 	if (!skb_mac_header_was_set(skb)) {
 		WARN_ONCE(1, "%s: Mac header not set\n", __func__);
@@ -415,7 +443,8 @@ void hsr_addr_subst_dest(struct hsr_node *node_src, struct sk_buff *skb,
 	if (!is_unicast_ether_addr(eth_hdr(skb)->h_dest))
 		return;
 
-	node_dst = find_node_by_addr_A(&port->hsr->node_db,
+	hash = hsr_mac_hash(port->hsr, eth_hdr(skb)->h_dest);
+	node_dst = find_node_by_addr_A(&port->hsr->node_db[hash],
 				       eth_hdr(skb)->h_dest);
 	if (!node_dst) {
 		if (net_ratelimit())
@@ -491,59 +520,73 @@ static struct hsr_port *get_late_port(struct hsr_priv *hsr,
 void hsr_prune_nodes(struct timer_list *t)
 {
 	struct hsr_priv *hsr = from_timer(hsr, t, prune_timer);
+	struct hlist_node *tmp;
 	struct hsr_node *node;
-	struct hsr_node *tmp;
 	struct hsr_port *port;
 	unsigned long timestamp;
 	unsigned long time_a, time_b;
+	int i;
 
 	spin_lock_bh(&hsr->list_lock);
-	list_for_each_entry_safe(node, tmp, &hsr->node_db, mac_list) {
-		/* Don't prune own node. Neither time_in[HSR_PT_SLAVE_A]
-		 * nor time_in[HSR_PT_SLAVE_B], will ever be updated for
-		 * the master port. Thus the master node will be repeatedly
-		 * pruned leading to packet loss.
-		 */
-		if (hsr_addr_is_self(hsr, node->macaddress_A))
-			continue;
-
-		/* Shorthand */
-		time_a = node->time_in[HSR_PT_SLAVE_A];
-		time_b = node->time_in[HSR_PT_SLAVE_B];
-
-		/* Check for timestamps old enough to risk wrap-around */
-		if (time_after(jiffies, time_a + MAX_JIFFY_OFFSET / 2))
-			node->time_in_stale[HSR_PT_SLAVE_A] = true;
-		if (time_after(jiffies, time_b + MAX_JIFFY_OFFSET / 2))
-			node->time_in_stale[HSR_PT_SLAVE_B] = true;
-
-		/* Get age of newest frame from node.
-		 * At least one time_in is OK here; nodes get pruned long
-		 * before both time_ins can get stale
-		 */
-		timestamp = time_a;
-		if (node->time_in_stale[HSR_PT_SLAVE_A] ||
-		    (!node->time_in_stale[HSR_PT_SLAVE_B] &&
-		    time_after(time_b, time_a)))
-			timestamp = time_b;
-
-		/* Warn of ring error only as long as we get frames at all */
-		if (time_is_after_jiffies(timestamp +
-				msecs_to_jiffies(1.5 * MAX_SLAVE_DIFF))) {
-			rcu_read_lock();
-			port = get_late_port(hsr, node);
-			if (port)
-				hsr_nl_ringerror(hsr, node->macaddress_A, port);
-			rcu_read_unlock();
-		}
 
-		/* Prune old entries */
-		if (time_is_before_jiffies(timestamp +
-				msecs_to_jiffies(HSR_NODE_FORGET_TIME))) {
-			hsr_nl_nodedown(hsr, node->macaddress_A);
-			list_del_rcu(&node->mac_list);
-			/* Note that we need to free this entry later: */
-			kfree_rcu(node, rcu_head);
+	for (i = 0; i < hsr->hash_buckets; i++) {
+		hlist_for_each_entry_safe(node, tmp, &hsr->node_db[i],
+					  mac_list) {
+			/* Don't prune own node.
+			 * Neither time_in[HSR_PT_SLAVE_A]
+			 * nor time_in[HSR_PT_SLAVE_B], will ever be updated
+			 * for the master port. Thus the master node will be
+			 * repeatedly pruned leading to packet loss.
+			 */
+			if (hsr_addr_is_self(hsr, node->macaddress_A))
+				continue;
+
+			/* Shorthand */
+			time_a = node->time_in[HSR_PT_SLAVE_A];
+			time_b = node->time_in[HSR_PT_SLAVE_B];
+
+			/* Check for timestamps old enough to
+			 * risk wrap-around
+			 */
+			if (time_after(jiffies, time_a + MAX_JIFFY_OFFSET / 2))
+				node->time_in_stale[HSR_PT_SLAVE_A] = true;
+			if (time_after(jiffies, time_b + MAX_JIFFY_OFFSET / 2))
+				node->time_in_stale[HSR_PT_SLAVE_B] = true;
+
+			/* Get age of newest frame from node.
+			 * At least one time_in is OK here; nodes get pruned
+			 * long before both time_ins can get stale
+			 */
+			timestamp = time_a;
+			if (node->time_in_stale[HSR_PT_SLAVE_A] ||
+			    (!node->time_in_stale[HSR_PT_SLAVE_B] &&
+			     time_after(time_b, time_a)))
+				timestamp = time_b;
+
+			/* Warn of ring error only as long as we get
+			 * frames at all
+			 */
+			if (time_is_after_jiffies(timestamp +
+						  msecs_to_jiffies(1.5 * MAX_SLAVE_DIFF))) {
+				rcu_read_lock();
+				port = get_late_port(hsr, node);
+				if (port)
+					hsr_nl_ringerror(hsr,
+							 node->macaddress_A,
+							 port);
+				rcu_read_unlock();
+			}
+
+			/* Prune old entries */
+			if (time_is_before_jiffies(timestamp +
+						   msecs_to_jiffies(HSR_NODE_FORGET_TIME))) {
+				hsr_nl_nodedown(hsr, node->macaddress_A);
+				hlist_del_rcu(&node->mac_list);
+				/* Note that we need to free this
+				 * entry later:
+				 */
+				kfree_rcu(node, rcu_head);
+			}
 		}
 	}
 	spin_unlock_bh(&hsr->list_lock);
@@ -557,17 +600,20 @@ void *hsr_get_next_node(struct hsr_priv *hsr, void *_pos,
 			unsigned char addr[ETH_ALEN])
 {
 	struct hsr_node *node;
+	u32 hash;
+
+	hash = hsr_mac_hash(hsr, addr);
 
 	if (!_pos) {
-		node = list_first_or_null_rcu(&hsr->node_db,
-					      struct hsr_node, mac_list);
+		node = hsr_node_get_first(&hsr->node_db[hash],
+					  &hsr->list_lock);
 		if (node)
 			ether_addr_copy(addr, node->macaddress_A);
 		return node;
 	}
 
 	node = _pos;
-	list_for_each_entry_continue_rcu(node, &hsr->node_db, mac_list) {
+	hlist_for_each_entry_continue_rcu(node, mac_list) {
 		ether_addr_copy(addr, node->macaddress_A);
 		return node;
 	}
@@ -587,8 +633,11 @@ int hsr_get_node_data(struct hsr_priv *hsr,
 	struct hsr_node *node;
 	struct hsr_port *port;
 	unsigned long tdiff;
+	u32 hash;
+
+	hash = hsr_mac_hash(hsr, addr);
 
-	node = find_node_by_addr_A(&hsr->node_db, addr);
+	node = find_node_by_addr_A(&hsr->node_db[hash], addr);
 	if (!node)
 		return -ENOENT;
 
diff --git a/net/hsr/hsr_framereg.h b/net/hsr/hsr_framereg.h
index bdbb8c822ba1..f3762e9e42b5 100644
--- a/net/hsr/hsr_framereg.h
+++ b/net/hsr/hsr_framereg.h
@@ -28,9 +28,17 @@ struct hsr_frame_info {
 	bool is_from_san;
 };
 
+#ifdef CONFIG_LOCKDEP
+int lockdep_hsr_is_held(spinlock_t *lock);
+#else
+#define lockdep_hsr_is_held(lock)	1
+#endif
+
+u32 hsr_mac_hash(struct hsr_priv *hsr, const unsigned char *addr);
+struct hsr_node *hsr_node_get_first(struct hlist_head *head, spinlock_t *lock);
 void hsr_del_self_node(struct hsr_priv *hsr);
-void hsr_del_nodes(struct list_head *node_db);
-struct hsr_node *hsr_get_node(struct hsr_port *port, struct list_head *node_db,
+void hsr_del_nodes(struct hlist_head *node_db);
+struct hsr_node *hsr_get_node(struct hsr_port *port, struct hlist_head *node_db,
 			      struct sk_buff *skb, bool is_sup,
 			      enum hsr_port_type rx_port);
 void hsr_handle_sup_frame(struct hsr_frame_info *frame);
@@ -68,7 +76,7 @@ void prp_handle_san_frame(bool san, enum hsr_port_type port,
 void prp_update_san_info(struct hsr_node *node, bool is_sup);
 
 struct hsr_node {
-	struct list_head	mac_list;
+	struct hlist_node	mac_list;
 	unsigned char		macaddress_A[ETH_ALEN];
 	unsigned char		macaddress_B[ETH_ALEN];
 	/* Local slave through which AddrB frames are received from this node */
diff --git a/net/hsr/hsr_main.h b/net/hsr/hsr_main.h
index 043e4e9a1694..b158ba409f9a 100644
--- a/net/hsr/hsr_main.h
+++ b/net/hsr/hsr_main.h
@@ -45,24 +45,11 @@
 /* PRP V1 life redundancy box MAC address */
 #define PRP_TLV_REDBOX_MAC		   30
 
-/* HSR Tag.
- * As defined in IEC-62439-3:2010, the HSR tag is really { ethertype = 0x88FB,
- * path, LSDU_size, sequence Nr }. But we let eth_header() create { h_dest,
- * h_source, h_proto = 0x88FB }, and add { path, LSDU_size, sequence Nr,
- * encapsulated protocol } instead.
- *
- * Field names as defined in the IEC:2010 standard for HSR.
- */
-struct hsr_tag {
-	__be16		path_and_LSDU_size;
-	__be16		sequence_nr;
-	__be16		encap_proto;
-} __packed;
-
-#define HSR_HLEN	6
-
 #define HSR_V1_SUP_LSDUSIZE		52
 
+#define HSR_HSIZE_SHIFT	8
+#define HSR_HSIZE	BIT(HSR_HSIZE_SHIFT)
+
 /* The helper functions below assumes that 'path' occupies the 4 most
  * significant bits of the 16-bit field shared by 'path' and 'LSDU_size' (or
  * equivalently, the 4 most significant bits of HSR tag byte 14).
@@ -201,8 +188,8 @@ struct hsr_proto_ops {
 struct hsr_priv {
 	struct rcu_head		rcu_head;
 	struct list_head	ports;
-	struct list_head	node_db;	/* Known HSR nodes */
-	struct list_head	self_node_db;	/* MACs of slaves */
+	struct hlist_head	node_db[HSR_HSIZE];	/* Known HSR nodes */
+	struct hlist_head	self_node_db;	/* MACs of slaves */
 	struct timer_list	announce_timer;	/* Supervision frame dispatch */
 	struct timer_list	prune_timer;
 	int announce_count;
@@ -212,6 +199,8 @@ struct hsr_priv {
 	spinlock_t seqnr_lock;	/* locking for sequence_nr */
 	spinlock_t list_lock;	/* locking for node list */
 	struct hsr_proto_ops	*proto_ops;
+	u32 hash_buckets;
+	u32 hash_seed;
 #define PRP_LAN_ID	0x5     /* 0x1010 for A and 0x1011 for B. Bit 0 is set
 				 * based on SLAVE_A or SLAVE_B
 				 */
@@ -259,11 +248,6 @@ static inline u16 prp_get_skb_sequence_nr(struct prp_rct *rct)
 	return ntohs(rct->sequence_nr);
 }
 
-static inline u16 get_prp_lan_id(struct prp_rct *rct)
-{
-	return ntohs(rct->lan_id_and_LSDU_size) >> 12;
-}
-
 /* assume there is a valid rct */
 static inline bool prp_check_lsdu_size(struct sk_buff *skb,
 				       struct prp_rct *rct,
diff --git a/net/hsr/hsr_netlink.c b/net/hsr/hsr_netlink.c
index f3c8f91dbe2c..1405c037cf7a 100644
--- a/net/hsr/hsr_netlink.c
+++ b/net/hsr/hsr_netlink.c
@@ -105,6 +105,7 @@ static int hsr_newlink(struct net *src_net, struct net_device *dev,
 static void hsr_dellink(struct net_device *dev, struct list_head *head)
 {
 	struct hsr_priv *hsr = netdev_priv(dev);
+	int i;
 
 	del_timer_sync(&hsr->prune_timer);
 	del_timer_sync(&hsr->announce_timer);
@@ -113,7 +114,8 @@ static void hsr_dellink(struct net_device *dev, struct list_head *head)
 	hsr_del_ports(hsr);
 
 	hsr_del_self_node(hsr);
-	hsr_del_nodes(&hsr->node_db);
+	for (i = 0; i < hsr->hash_buckets; i++)
+		hsr_del_nodes(&hsr->node_db[i]);
 
 	unregister_netdevice_queue(dev, head);
 }
diff --git a/net/ieee802154/6lowpan/core.c b/net/ieee802154/6lowpan/core.c
index 2cf62718a282..2c087b7f17c5 100644
--- a/net/ieee802154/6lowpan/core.c
+++ b/net/ieee802154/6lowpan/core.c
@@ -47,6 +47,7 @@
 #include <linux/module.h>
 #include <linux/netdevice.h>
 #include <linux/ieee802154.h>
+#include <linux/if_arp.h>
 
 #include <net/ipv6.h>
 
diff --git a/net/ieee802154/6lowpan/reassembly.c b/net/ieee802154/6lowpan/reassembly.c
index be6f06adefe0..a91283d1e5bf 100644
--- a/net/ieee802154/6lowpan/reassembly.c
+++ b/net/ieee802154/6lowpan/reassembly.c
@@ -130,6 +130,7 @@ static int lowpan_frag_queue(struct lowpan_frag_queue *fq,
 		goto err;
 
 	fq->q.stamp = skb->tstamp;
+	fq->q.mono_delivery_time = skb->mono_delivery_time;
 	if (frag_type == LOWPAN_DISPATCH_FRAG1)
 		fq->q.flags |= INET_FRAG_FIRST_IN;
 
diff --git a/net/ieee802154/nl-phy.c b/net/ieee802154/nl-phy.c
index dd5a45f8a78a..359249ab77bf 100644
--- a/net/ieee802154/nl-phy.c
+++ b/net/ieee802154/nl-phy.c
@@ -30,7 +30,7 @@ static int ieee802154_nl_fill_phy(struct sk_buff *msg, u32 portid,
 {
 	void *hdr;
 	int i, pages = 0;
-	uint32_t *buf = kcalloc(32, sizeof(uint32_t), GFP_KERNEL);
+	u32 *buf = kcalloc(IEEE802154_MAX_PAGE + 1, sizeof(u32), GFP_KERNEL);
 
 	pr_debug("%s\n", __func__);
 
@@ -47,7 +47,7 @@ static int ieee802154_nl_fill_phy(struct sk_buff *msg, u32 portid,
 	    nla_put_u8(msg, IEEE802154_ATTR_PAGE, phy->current_page) ||
 	    nla_put_u8(msg, IEEE802154_ATTR_CHANNEL, phy->current_channel))
 		goto nla_put_failure;
-	for (i = 0; i < 32; i++) {
+	for (i = 0; i <= IEEE802154_MAX_PAGE; i++) {
 		if (phy->supported.channels[i])
 			buf[pages++] = phy->supported.channels[i] | (i << 27);
 	}
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index 4db0325f6e1a..2d0c05ca9c6f 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -293,7 +293,7 @@ static int arp_constructor(struct neighbour *neigh)
 static void arp_error_report(struct neighbour *neigh, struct sk_buff *skb)
 {
 	dst_link_failure(skb);
-	kfree_skb(skb);
+	kfree_skb_reason(skb, SKB_DROP_REASON_NEIGH_FAILED);
 }
 
 /* Create and send an arp packet. */
@@ -1116,13 +1116,18 @@ static int arp_req_get(struct arpreq *r, struct net_device *dev)
 	return err;
 }
 
-static int arp_invalidate(struct net_device *dev, __be32 ip)
+int arp_invalidate(struct net_device *dev, __be32 ip, bool force)
 {
 	struct neighbour *neigh = neigh_lookup(&arp_tbl, &ip, dev);
 	int err = -ENXIO;
 	struct neigh_table *tbl = &arp_tbl;
 
 	if (neigh) {
+		if ((neigh->nud_state & NUD_VALID) && !force) {
+			neigh_release(neigh);
+			return 0;
+		}
+
 		if (neigh->nud_state & ~NUD_NOARP)
 			err = neigh_update(neigh, NULL, NUD_FAILED,
 					   NEIGH_UPDATE_F_OVERRIDE|
@@ -1169,7 +1174,7 @@ static int arp_req_delete(struct net *net, struct arpreq *r,
 		if (!dev)
 			return -EINVAL;
 	}
-	return arp_invalidate(dev, ip);
+	return arp_invalidate(dev, ip, true);
 }
 
 /*
diff --git a/net/ipv4/bpf_tcp_ca.c b/net/ipv4/bpf_tcp_ca.c
index de610cb83694..f79ab942f03b 100644
--- a/net/ipv4/bpf_tcp_ca.c
+++ b/net/ipv4/bpf_tcp_ca.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Copyright (c) 2019 Facebook  */
 
+#include <linux/init.h>
 #include <linux/types.h>
 #include <linux/bpf_verifier.h>
 #include <linux/bpf.h>
@@ -95,12 +96,14 @@ static int bpf_tcp_ca_btf_struct_access(struct bpf_verifier_log *log,
 					const struct btf *btf,
 					const struct btf_type *t, int off,
 					int size, enum bpf_access_type atype,
-					u32 *next_btf_id)
+					u32 *next_btf_id,
+					enum bpf_type_flag *flag)
 {
 	size_t end;
 
 	if (atype == BPF_READ)
-		return btf_struct_access(log, btf, t, off, size, atype, next_btf_id);
+		return btf_struct_access(log, btf, t, off, size, atype, next_btf_id,
+					 flag);
 
 	if (t != tcp_sock_type) {
 		bpf_log(log, "only read is supported\n");
@@ -212,26 +215,23 @@ bpf_tcp_ca_get_func_proto(enum bpf_func_id func_id,
 	}
 }
 
-BTF_SET_START(bpf_tcp_ca_kfunc_ids)
+BTF_SET_START(bpf_tcp_ca_check_kfunc_ids)
 BTF_ID(func, tcp_reno_ssthresh)
 BTF_ID(func, tcp_reno_cong_avoid)
 BTF_ID(func, tcp_reno_undo_cwnd)
 BTF_ID(func, tcp_slow_start)
 BTF_ID(func, tcp_cong_avoid_ai)
-BTF_SET_END(bpf_tcp_ca_kfunc_ids)
+BTF_SET_END(bpf_tcp_ca_check_kfunc_ids)
 
-static bool bpf_tcp_ca_check_kfunc_call(u32 kfunc_btf_id, struct module *owner)
-{
-	if (btf_id_set_contains(&bpf_tcp_ca_kfunc_ids, kfunc_btf_id))
-		return true;
-	return bpf_check_mod_kfunc_call(&bpf_tcp_ca_kfunc_list, kfunc_btf_id, owner);
-}
+static const struct btf_kfunc_id_set bpf_tcp_ca_kfunc_set = {
+	.owner     = THIS_MODULE,
+	.check_set = &bpf_tcp_ca_check_kfunc_ids,
+};
 
 static const struct bpf_verifier_ops bpf_tcp_ca_verifier_ops = {
 	.get_func_proto		= bpf_tcp_ca_get_func_proto,
 	.is_valid_access	= bpf_tcp_ca_is_valid_access,
 	.btf_struct_access	= bpf_tcp_ca_btf_struct_access,
-	.check_kfunc_call	= bpf_tcp_ca_check_kfunc_call,
 };
 
 static int bpf_tcp_ca_init_member(const struct btf_type *t,
@@ -300,3 +300,9 @@ struct bpf_struct_ops bpf_tcp_congestion_ops = {
 	.init = bpf_tcp_ca_init,
 	.name = "tcp_congestion_ops",
 };
+
+static int __init bpf_tcp_ca_kfunc_init(void)
+{
+	return register_btf_kfunc_id_set(BPF_PROG_TYPE_STRUCT_OPS, &bpf_tcp_ca_kfunc_set);
+}
+late_initcall(bpf_tcp_ca_kfunc_init);
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index fba2bffd65f7..53a6b14dc50a 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -104,6 +104,7 @@ static const struct nla_policy ifa_ipv4_policy[IFA_MAX+1] = {
 	[IFA_FLAGS]		= { .type = NLA_U32 },
 	[IFA_RT_PRIORITY]	= { .type = NLA_U32 },
 	[IFA_TARGET_NETNSID]	= { .type = NLA_S32 },
+	[IFA_PROTO]		= { .type = NLA_U8 },
 };
 
 struct inet_fill_args {
@@ -889,6 +890,9 @@ static struct in_ifaddr *rtm_to_ifaddr(struct net *net, struct nlmsghdr *nlh,
 	if (tb[IFA_RT_PRIORITY])
 		ifa->ifa_rt_priority = nla_get_u32(tb[IFA_RT_PRIORITY]);
 
+	if (tb[IFA_PROTO])
+		ifa->ifa_proto = nla_get_u8(tb[IFA_PROTO]);
+
 	if (tb[IFA_CACHEINFO]) {
 		struct ifa_cacheinfo *ci;
 
@@ -1625,6 +1629,7 @@ static size_t inet_nlmsg_size(void)
 	       + nla_total_size(4) /* IFA_BROADCAST */
 	       + nla_total_size(IFNAMSIZ) /* IFA_LABEL */
 	       + nla_total_size(4)  /* IFA_FLAGS */
+	       + nla_total_size(1)  /* IFA_PROTO */
 	       + nla_total_size(4)  /* IFA_RT_PRIORITY */
 	       + nla_total_size(sizeof(struct ifa_cacheinfo)); /* IFA_CACHEINFO */
 }
@@ -1699,6 +1704,8 @@ static int inet_fill_ifaddr(struct sk_buff *skb, struct in_ifaddr *ifa,
 	     nla_put_in_addr(skb, IFA_BROADCAST, ifa->ifa_broadcast)) ||
 	    (ifa->ifa_label[0] &&
 	     nla_put_string(skb, IFA_LABEL, ifa->ifa_label)) ||
+	    (ifa->ifa_proto &&
+	     nla_put_u8(skb, IFA_PROTO, ifa->ifa_proto)) ||
 	    nla_put_u32(skb, IFA_FLAGS, ifa->ifa_flags) ||
 	    (ifa->ifa_rt_priority &&
 	     nla_put_u32(skb, IFA_RT_PRIORITY, ifa->ifa_rt_priority)) ||
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 85117b45216d..af8209f912ab 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -32,6 +32,7 @@
 #include <linux/list.h>
 #include <linux/slab.h>
 
+#include <net/inet_dscp.h>
 #include <net/ip.h>
 #include <net/protocol.h>
 #include <net/route.h>
@@ -290,7 +291,7 @@ __be32 fib_compute_spec_dst(struct sk_buff *skb)
 		bool vmark = in_dev && IN_DEV_SRC_VMARK(in_dev);
 		struct flowi4 fl4 = {
 			.flowi4_iif = LOOPBACK_IFINDEX,
-			.flowi4_oif = l3mdev_master_ifindex_rcu(dev),
+			.flowi4_l3mdev = l3mdev_master_ifindex_rcu(dev),
 			.daddr = ip_hdr(skb)->saddr,
 			.flowi4_tos = ip_hdr(skb)->tos & IPTOS_RT_MASK,
 			.flowi4_scope = scope,
@@ -352,9 +353,8 @@ static int __fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
 	bool dev_match;
 
 	fl4.flowi4_oif = 0;
-	fl4.flowi4_iif = l3mdev_master_ifindex_rcu(dev);
-	if (!fl4.flowi4_iif)
-		fl4.flowi4_iif = oif ? : LOOPBACK_IFINDEX;
+	fl4.flowi4_l3mdev = l3mdev_master_ifindex_rcu(dev);
+	fl4.flowi4_iif = oif ? : LOOPBACK_IFINDEX;
 	fl4.daddr = src;
 	fl4.saddr = dst;
 	fl4.flowi4_tos = tos;
@@ -738,8 +738,16 @@ static int rtm_to_fib_config(struct net *net, struct sk_buff *skb,
 	memset(cfg, 0, sizeof(*cfg));
 
 	rtm = nlmsg_data(nlh);
+
+	if (!inet_validate_dscp(rtm->rtm_tos)) {
+		NL_SET_ERR_MSG(extack,
+			       "Invalid dsfield (tos): ECN bits must be 0");
+		err = -EINVAL;
+		goto errout;
+	}
+	cfg->fc_dscp = inet_dsfield_to_dscp(rtm->rtm_tos);
+
 	cfg->fc_dst_len = rtm->rtm_dst_len;
-	cfg->fc_tos = rtm->rtm_tos;
 	cfg->fc_table = rtm->rtm_table;
 	cfg->fc_protocol = rtm->rtm_protocol;
 	cfg->fc_scope = rtm->rtm_scope;
@@ -1115,9 +1123,11 @@ void fib_add_ifaddr(struct in_ifaddr *ifa)
 		return;
 
 	/* Add broadcast address, if it is explicitly assigned. */
-	if (ifa->ifa_broadcast && ifa->ifa_broadcast != htonl(0xFFFFFFFF))
+	if (ifa->ifa_broadcast && ifa->ifa_broadcast != htonl(0xFFFFFFFF)) {
 		fib_magic(RTM_NEWROUTE, RTN_BROADCAST, ifa->ifa_broadcast, 32,
 			  prim, 0);
+		arp_invalidate(dev, ifa->ifa_broadcast, false);
+	}
 
 	if (!ipv4_is_zeronet(prefix) && !(ifa->ifa_flags & IFA_F_SECONDARY) &&
 	    (prefix != addr || ifa->ifa_prefixlen < 32)) {
@@ -1131,6 +1141,7 @@ void fib_add_ifaddr(struct in_ifaddr *ifa)
 		if (ifa->ifa_prefixlen < 31) {
 			fib_magic(RTM_NEWROUTE, RTN_BROADCAST, prefix | ~mask,
 				  32, prim, 0);
+			arp_invalidate(dev, prefix | ~mask, false);
 		}
 	}
 }
@@ -1550,7 +1561,7 @@ static void ip_fib_net_exit(struct net *net)
 {
 	int i;
 
-	rtnl_lock();
+	ASSERT_RTNL();
 #ifdef CONFIG_IP_MULTIPLE_TABLES
 	RCU_INIT_POINTER(net->ipv4.fib_main, NULL);
 	RCU_INIT_POINTER(net->ipv4.fib_default, NULL);
@@ -1575,7 +1586,7 @@ static void ip_fib_net_exit(struct net *net)
 #ifdef CONFIG_IP_MULTIPLE_TABLES
 	fib4_rules_exit(net);
 #endif
-	rtnl_unlock();
+
 	kfree(net->ipv4.fib_table_hash);
 	fib4_notifier_exit(net);
 }
@@ -1602,7 +1613,9 @@ out:
 out_proc:
 	nl_fib_lookup_exit(net);
 out_nlfl:
+	rtnl_lock();
 	ip_fib_net_exit(net);
+	rtnl_unlock();
 	goto out;
 }
 
@@ -1610,12 +1623,23 @@ static void __net_exit fib_net_exit(struct net *net)
 {
 	fib_proc_exit(net);
 	nl_fib_lookup_exit(net);
-	ip_fib_net_exit(net);
+}
+
+static void __net_exit fib_net_exit_batch(struct list_head *net_list)
+{
+	struct net *net;
+
+	rtnl_lock();
+	list_for_each_entry(net, net_list, exit_list)
+		ip_fib_net_exit(net);
+
+	rtnl_unlock();
 }
 
 static struct pernet_operations fib_net_ops = {
 	.init = fib_net_init,
 	.exit = fib_net_exit,
+	.exit_batch = fib_net_exit_batch,
 };
 
 void __init ip_fib_init(void)
diff --git a/net/ipv4/fib_lookup.h b/net/ipv4/fib_lookup.h
index 78e40ea42e58..f9b9e26c32c1 100644
--- a/net/ipv4/fib_lookup.h
+++ b/net/ipv4/fib_lookup.h
@@ -4,13 +4,14 @@
 
 #include <linux/types.h>
 #include <linux/list.h>
+#include <net/inet_dscp.h>
 #include <net/ip_fib.h>
 #include <net/nexthop.h>
 
 struct fib_alias {
 	struct hlist_node	fa_list;
 	struct fib_info		*fa_info;
-	u8			fa_tos;
+	dscp_t			fa_dscp;
 	u8			fa_type;
 	u8			fa_state;
 	u8			fa_slen;
diff --git a/net/ipv4/fib_rules.c b/net/ipv4/fib_rules.c
index e0b6c8b6de57..001fea394bde 100644
--- a/net/ipv4/fib_rules.c
+++ b/net/ipv4/fib_rules.c
@@ -23,6 +23,7 @@
 #include <linux/list.h>
 #include <linux/rcupdate.h>
 #include <linux/export.h>
+#include <net/inet_dscp.h>
 #include <net/ip.h>
 #include <net/route.h>
 #include <net/tcp.h>
@@ -35,7 +36,7 @@ struct fib4_rule {
 	struct fib_rule		common;
 	u8			dst_len;
 	u8			src_len;
-	u8			tos;
+	dscp_t			dscp;
 	__be32			src;
 	__be32			srcmask;
 	__be32			dst;
@@ -49,7 +50,7 @@ static bool fib4_rule_matchall(const struct fib_rule *rule)
 {
 	struct fib4_rule *r = container_of(rule, struct fib4_rule, common);
 
-	if (r->dst_len || r->src_len || r->tos)
+	if (r->dst_len || r->src_len || r->dscp)
 		return false;
 	return fib_rule_matchall(rule);
 }
@@ -185,7 +186,7 @@ INDIRECT_CALLABLE_SCOPE int fib4_rule_match(struct fib_rule *rule,
 	    ((daddr ^ r->dst) & r->dstmask))
 		return 0;
 
-	if (r->tos && (r->tos != fl4->flowi4_tos))
+	if (r->dscp && r->dscp != inet_dsfield_to_dscp(fl4->flowi4_tos))
 		return 0;
 
 	if (rule->ip_proto && (rule->ip_proto != fl4->flowi4_proto))
@@ -225,10 +226,17 @@ static int fib4_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
 	int err = -EINVAL;
 	struct fib4_rule *rule4 = (struct fib4_rule *) rule;
 
+	if (!inet_validate_dscp(frh->tos)) {
+		NL_SET_ERR_MSG(extack,
+			       "Invalid dsfield (tos): ECN bits must be 0");
+		goto errout;
+	}
+	/* IPv4 currently doesn't handle high order DSCP bits correctly */
 	if (frh->tos & ~IPTOS_TOS_MASK) {
 		NL_SET_ERR_MSG(extack, "Invalid tos");
 		goto errout;
 	}
+	rule4->dscp = inet_dsfield_to_dscp(frh->tos);
 
 	/* split local/main if they are not already split */
 	err = fib_unmerge(net);
@@ -270,7 +278,6 @@ static int fib4_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
 	rule4->srcmask = inet_make_mask(rule4->src_len);
 	rule4->dst_len = frh->dst_len;
 	rule4->dstmask = inet_make_mask(rule4->dst_len);
-	rule4->tos = frh->tos;
 
 	net->ipv4.fib_has_custom_rules = true;
 
@@ -313,7 +320,7 @@ static int fib4_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh,
 	if (frh->dst_len && (rule4->dst_len != frh->dst_len))
 		return 0;
 
-	if (frh->tos && (rule4->tos != frh->tos))
+	if (frh->tos && inet_dscp_to_dsfield(rule4->dscp) != frh->tos)
 		return 0;
 
 #ifdef CONFIG_IP_ROUTE_CLASSID
@@ -337,7 +344,7 @@ static int fib4_rule_fill(struct fib_rule *rule, struct sk_buff *skb,
 
 	frh->dst_len = rule4->dst_len;
 	frh->src_len = rule4->src_len;
-	frh->tos = rule4->tos;
+	frh->tos = inet_dscp_to_dsfield(rule4->dscp);
 
 	if ((rule4->dst_len &&
 	     nla_put_in_addr(skb, FRA_DST, rule4->dst)) ||
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 2dd375f7407b..cc8e84ef2ae4 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -32,6 +32,7 @@
 #include <linux/hash.h>
 
 #include <net/arp.h>
+#include <net/inet_dscp.h>
 #include <net/ip.h>
 #include <net/protocol.h>
 #include <net/route.h>
@@ -523,7 +524,7 @@ void rtmsg_fib(int event, __be32 key, struct fib_alias *fa,
 	fri.tb_id = tb_id;
 	fri.dst = key;
 	fri.dst_len = dst_len;
-	fri.tos = fa->fa_tos;
+	fri.tos = inet_dscp_to_dsfield(fa->fa_dscp);
 	fri.type = fa->fa_type;
 	fri.offload = READ_ONCE(fa->offload);
 	fri.trap = READ_ONCE(fa->trap);
@@ -1257,34 +1258,13 @@ fib_info_laddrhash_bucket(const struct net *net, __be32 val)
 	return &fib_info_laddrhash[slot];
 }
 
-static struct hlist_head *fib_info_hash_alloc(int bytes)
-{
-	if (bytes <= PAGE_SIZE)
-		return kzalloc(bytes, GFP_KERNEL);
-	else
-		return (struct hlist_head *)
-			__get_free_pages(GFP_KERNEL | __GFP_ZERO,
-					 get_order(bytes));
-}
-
-static void fib_info_hash_free(struct hlist_head *hash, int bytes)
-{
-	if (!hash)
-		return;
-
-	if (bytes <= PAGE_SIZE)
-		kfree(hash);
-	else
-		free_pages((unsigned long) hash, get_order(bytes));
-}
-
 static void fib_info_hash_move(struct hlist_head *new_info_hash,
 			       struct hlist_head *new_laddrhash,
 			       unsigned int new_size)
 {
 	struct hlist_head *old_info_hash, *old_laddrhash;
 	unsigned int old_size = fib_info_hash_size;
-	unsigned int i, bytes;
+	unsigned int i;
 
 	spin_lock_bh(&fib_info_lock);
 	old_info_hash = fib_info_hash;
@@ -1325,9 +1305,8 @@ static void fib_info_hash_move(struct hlist_head *new_info_hash,
 
 	spin_unlock_bh(&fib_info_lock);
 
-	bytes = old_size * sizeof(struct hlist_head *);
-	fib_info_hash_free(old_info_hash, bytes);
-	fib_info_hash_free(old_laddrhash, bytes);
+	kvfree(old_info_hash);
+	kvfree(old_laddrhash);
 }
 
 __be32 fib_info_update_nhc_saddr(struct net *net, struct fib_nh_common *nhc,
@@ -1444,19 +1423,19 @@ struct fib_info *fib_create_info(struct fib_config *cfg,
 		unsigned int new_size = fib_info_hash_size << 1;
 		struct hlist_head *new_info_hash;
 		struct hlist_head *new_laddrhash;
-		unsigned int bytes;
+		size_t bytes;
 
 		if (!new_size)
 			new_size = 16;
-		bytes = new_size * sizeof(struct hlist_head *);
-		new_info_hash = fib_info_hash_alloc(bytes);
-		new_laddrhash = fib_info_hash_alloc(bytes);
+		bytes = (size_t)new_size * sizeof(struct hlist_head *);
+		new_info_hash = kvzalloc(bytes, GFP_KERNEL);
+		new_laddrhash = kvzalloc(bytes, GFP_KERNEL);
 		if (!new_info_hash || !new_laddrhash) {
-			fib_info_hash_free(new_info_hash, bytes);
-			fib_info_hash_free(new_laddrhash, bytes);
-		} else
+			kvfree(new_info_hash);
+			kvfree(new_laddrhash);
+		} else {
 			fib_info_hash_move(new_info_hash, new_laddrhash, new_size);
-
+		}
 		if (!fib_info_hash_size)
 			goto failure;
 	}
@@ -2061,7 +2040,7 @@ static void fib_select_default(const struct flowi4 *flp, struct fib_result *res)
 	int order = -1, last_idx = -1;
 	struct fib_alias *fa, *fa1 = NULL;
 	u32 last_prio = res->fi->fib_priority;
-	u8 last_tos = 0;
+	dscp_t last_dscp = 0;
 
 	hlist_for_each_entry_rcu(fa, fa_head, fa_list) {
 		struct fib_info *next_fi = fa->fa_info;
@@ -2069,19 +2048,20 @@ static void fib_select_default(const struct flowi4 *flp, struct fib_result *res)
 
 		if (fa->fa_slen != slen)
 			continue;
-		if (fa->fa_tos && fa->fa_tos != flp->flowi4_tos)
+		if (fa->fa_dscp &&
+		    fa->fa_dscp != inet_dsfield_to_dscp(flp->flowi4_tos))
 			continue;
 		if (fa->tb_id != tb->tb_id)
 			continue;
 		if (next_fi->fib_priority > last_prio &&
-		    fa->fa_tos == last_tos) {
-			if (last_tos)
+		    fa->fa_dscp == last_dscp) {
+			if (last_dscp)
 				continue;
 			break;
 		}
 		if (next_fi->fib_flags & RTNH_F_DEAD)
 			continue;
-		last_tos = fa->fa_tos;
+		last_dscp = fa->fa_dscp;
 		last_prio = next_fi->fib_priority;
 
 		if (next_fi->fib_scope != res->scope ||
@@ -2254,7 +2234,7 @@ void fib_select_multipath(struct fib_result *res, int hash)
 void fib_select_path(struct net *net, struct fib_result *res,
 		     struct flowi4 *fl4, const struct sk_buff *skb)
 {
-	if (fl4->flowi4_oif && !(fl4->flowi4_flags & FLOWI_FLAG_SKIP_NH_OIF))
+	if (fl4->flowi4_oif)
 		goto check_saddr;
 
 #ifdef CONFIG_IP_ROUTE_MULTIPATH
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index f7f74d5c14da..fb0e49c36c2e 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -61,6 +61,7 @@
 #include <linux/vmalloc.h>
 #include <linux/notifier.h>
 #include <net/net_namespace.h>
+#include <net/inet_dscp.h>
 #include <net/ip.h>
 #include <net/protocol.h>
 #include <net/route.h>
@@ -81,7 +82,7 @@ static int call_fib_entry_notifier(struct notifier_block *nb,
 		.dst = dst,
 		.dst_len = dst_len,
 		.fi = fa->fa_info,
-		.tos = fa->fa_tos,
+		.tos = inet_dscp_to_dsfield(fa->fa_dscp),
 		.type = fa->fa_type,
 		.tb_id = fa->tb_id,
 	};
@@ -98,7 +99,7 @@ static int call_fib_entry_notifiers(struct net *net,
 		.dst = dst,
 		.dst_len = dst_len,
 		.fi = fa->fa_info,
-		.tos = fa->fa_tos,
+		.tos = inet_dscp_to_dsfield(fa->fa_dscp),
 		.type = fa->fa_type,
 		.tb_id = fa->tb_id,
 	};
@@ -973,13 +974,13 @@ static struct key_vector *fib_find_node(struct trie *t,
 	return n;
 }
 
-/* Return the first fib alias matching TOS with
+/* Return the first fib alias matching DSCP with
  * priority less than or equal to PRIO.
  * If 'find_first' is set, return the first matching
- * fib alias, regardless of TOS and priority.
+ * fib alias, regardless of DSCP and priority.
  */
 static struct fib_alias *fib_find_alias(struct hlist_head *fah, u8 slen,
-					u8 tos, u32 prio, u32 tb_id,
+					dscp_t dscp, u32 prio, u32 tb_id,
 					bool find_first)
 {
 	struct fib_alias *fa;
@@ -988,6 +989,10 @@ static struct fib_alias *fib_find_alias(struct hlist_head *fah, u8 slen,
 		return NULL;
 
 	hlist_for_each_entry(fa, fah, fa_list) {
+		/* Avoid Sparse warning when using dscp_t in inequalities */
+		u8 __fa_dscp = inet_dscp_to_dsfield(fa->fa_dscp);
+		u8 __dscp = inet_dscp_to_dsfield(dscp);
+
 		if (fa->fa_slen < slen)
 			continue;
 		if (fa->fa_slen != slen)
@@ -998,9 +1003,9 @@ static struct fib_alias *fib_find_alias(struct hlist_head *fah, u8 slen,
 			break;
 		if (find_first)
 			return fa;
-		if (fa->fa_tos > tos)
+		if (__fa_dscp > __dscp)
 			continue;
-		if (fa->fa_info->fib_priority >= prio || fa->fa_tos < tos)
+		if (fa->fa_info->fib_priority >= prio || __fa_dscp < __dscp)
 			return fa;
 	}
 
@@ -1027,8 +1032,8 @@ fib_find_matching_alias(struct net *net, const struct fib_rt_info *fri)
 
 	hlist_for_each_entry_rcu(fa, &l->leaf, fa_list) {
 		if (fa->fa_slen == slen && fa->tb_id == fri->tb_id &&
-		    fa->fa_tos == fri->tos && fa->fa_info == fri->fi &&
-		    fa->fa_type == fri->type)
+		    fa->fa_dscp == inet_dsfield_to_dscp(fri->tos) &&
+		    fa->fa_info == fri->fi && fa->fa_type == fri->type)
 			return fa;
 	}
 
@@ -1214,7 +1219,7 @@ int fib_table_insert(struct net *net, struct fib_table *tb,
 	struct fib_info *fi;
 	u8 plen = cfg->fc_dst_len;
 	u8 slen = KEYLENGTH - plen;
-	u8 tos = cfg->fc_tos;
+	dscp_t dscp;
 	u32 key;
 	int err;
 
@@ -1231,12 +1236,13 @@ int fib_table_insert(struct net *net, struct fib_table *tb,
 		goto err;
 	}
 
+	dscp = cfg->fc_dscp;
 	l = fib_find_node(t, &tp, key);
-	fa = l ? fib_find_alias(&l->leaf, slen, tos, fi->fib_priority,
+	fa = l ? fib_find_alias(&l->leaf, slen, dscp, fi->fib_priority,
 				tb->tb_id, false) : NULL;
 
 	/* Now fa, if non-NULL, points to the first fib alias
-	 * with the same keys [prefix,tos,priority], if such key already
+	 * with the same keys [prefix,dscp,priority], if such key already
 	 * exists or to the node before which we will insert new one.
 	 *
 	 * If fa is NULL, we will need to allocate a new one and
@@ -1244,7 +1250,7 @@ int fib_table_insert(struct net *net, struct fib_table *tb,
 	 * of the new alias.
 	 */
 
-	if (fa && fa->fa_tos == tos &&
+	if (fa && fa->fa_dscp == dscp &&
 	    fa->fa_info->fib_priority == fi->fib_priority) {
 		struct fib_alias *fa_first, *fa_match;
 
@@ -1264,7 +1270,7 @@ int fib_table_insert(struct net *net, struct fib_table *tb,
 		hlist_for_each_entry_from(fa, fa_list) {
 			if ((fa->fa_slen != slen) ||
 			    (fa->tb_id != tb->tb_id) ||
-			    (fa->fa_tos != tos))
+			    (fa->fa_dscp != dscp))
 				break;
 			if (fa->fa_info->fib_priority != fi->fib_priority)
 				break;
@@ -1292,7 +1298,7 @@ int fib_table_insert(struct net *net, struct fib_table *tb,
 				goto out;
 
 			fi_drop = fa->fa_info;
-			new_fa->fa_tos = fa->fa_tos;
+			new_fa->fa_dscp = fa->fa_dscp;
 			new_fa->fa_info = fi;
 			new_fa->fa_type = cfg->fc_type;
 			state = fa->fa_state;
@@ -1355,7 +1361,7 @@ int fib_table_insert(struct net *net, struct fib_table *tb,
 		goto out;
 
 	new_fa->fa_info = fi;
-	new_fa->fa_tos = tos;
+	new_fa->fa_dscp = dscp;
 	new_fa->fa_type = cfg->fc_type;
 	new_fa->fa_state = 0;
 	new_fa->fa_slen = slen;
@@ -1423,11 +1429,8 @@ bool fib_lookup_good_nhc(const struct fib_nh_common *nhc, int fib_flags,
 	    !(fib_flags & FIB_LOOKUP_IGNORE_LINKSTATE))
 		return false;
 
-	if (!(flp->flowi4_flags & FLOWI_FLAG_SKIP_NH_OIF)) {
-		if (flp->flowi4_oif &&
-		    flp->flowi4_oif != nhc->nhc_oif)
-			return false;
-	}
+	if (flp->flowi4_oif && flp->flowi4_oif != nhc->nhc_oif)
+		return false;
 
 	return true;
 }
@@ -1571,7 +1574,8 @@ found:
 			if (index >= (1ul << fa->fa_slen))
 				continue;
 		}
-		if (fa->fa_tos && fa->fa_tos != flp->flowi4_tos)
+		if (fa->fa_dscp &&
+		    inet_dscp_to_dsfield(fa->fa_dscp) != flp->flowi4_tos)
 			continue;
 		if (fi->fib_dead)
 			continue;
@@ -1707,7 +1711,7 @@ int fib_table_delete(struct net *net, struct fib_table *tb,
 	struct key_vector *l, *tp;
 	u8 plen = cfg->fc_dst_len;
 	u8 slen = KEYLENGTH - plen;
-	u8 tos = cfg->fc_tos;
+	dscp_t dscp;
 	u32 key;
 
 	key = ntohl(cfg->fc_dst);
@@ -1719,11 +1723,13 @@ int fib_table_delete(struct net *net, struct fib_table *tb,
 	if (!l)
 		return -ESRCH;
 
-	fa = fib_find_alias(&l->leaf, slen, tos, 0, tb->tb_id, false);
+	dscp = cfg->fc_dscp;
+	fa = fib_find_alias(&l->leaf, slen, dscp, 0, tb->tb_id, false);
 	if (!fa)
 		return -ESRCH;
 
-	pr_debug("Deleting %08x/%d tos=%d t=%p\n", key, plen, tos, t);
+	pr_debug("Deleting %08x/%d dsfield=0x%02x t=%p\n", key, plen,
+		 inet_dscp_to_dsfield(dscp), t);
 
 	fa_to_delete = NULL;
 	hlist_for_each_entry_from(fa, fa_list) {
@@ -1731,7 +1737,7 @@ int fib_table_delete(struct net *net, struct fib_table *tb,
 
 		if ((fa->fa_slen != slen) ||
 		    (fa->tb_id != tb->tb_id) ||
-		    (fa->fa_tos != tos))
+		    (fa->fa_dscp != dscp))
 			break;
 
 		if ((!cfg->fc_type || fa->fa_type == cfg->fc_type) &&
@@ -2299,7 +2305,7 @@ static int fn_trie_dump_leaf(struct key_vector *l, struct fib_table *tb,
 				fri.tb_id = tb->tb_id;
 				fri.dst = xkey;
 				fri.dst_len = KEYLENGTH - fa->fa_slen;
-				fri.tos = fa->fa_tos;
+				fri.tos = inet_dscp_to_dsfield(fa->fa_dscp);
 				fri.type = fa->fa_type;
 				fri.offload = READ_ONCE(fa->offload);
 				fri.trap = READ_ONCE(fa->trap);
@@ -2811,8 +2817,9 @@ static int fib_trie_seq_show(struct seq_file *seq, void *v)
 					     fa->fa_info->fib_scope),
 				   rtn_type(buf2, sizeof(buf2),
 					    fa->fa_type));
-			if (fa->fa_tos)
-				seq_printf(seq, " tos=%d", fa->fa_tos);
+			if (fa->fa_dscp)
+				seq_printf(seq, " tos=%d",
+					   inet_dscp_to_dsfield(fa->fa_dscp));
 			seq_putc(seq, '\n');
 		}
 	}
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index b7e277d8a84d..72a375c7f417 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -192,24 +192,14 @@ struct icmp_control {
 
 static const struct icmp_control icmp_pointers[NR_ICMP_TYPES+1];
 
-/*
- *	The ICMP socket(s). This is the most convenient way to flow control
- *	our ICMP output as well as maintain a clean interface throughout
- *	all layers. All Socketless IP sends will soon be gone.
- *
- *	On SMP we have one ICMP socket per-cpu.
- */
-static struct sock *icmp_sk(struct net *net)
-{
-	return this_cpu_read(*net->ipv4.icmp_sk);
-}
+static DEFINE_PER_CPU(struct sock *, ipv4_icmp_sk);
 
 /* Called with BH disabled */
 static inline struct sock *icmp_xmit_lock(struct net *net)
 {
 	struct sock *sk;
 
-	sk = icmp_sk(net);
+	sk = this_cpu_read(ipv4_icmp_sk);
 
 	if (unlikely(!spin_trylock(&sk->sk_lock.slock))) {
 		/* This can happen if the output path signals a
@@ -217,11 +207,13 @@ static inline struct sock *icmp_xmit_lock(struct net *net)
 		 */
 		return NULL;
 	}
+	sock_net_set(sk, net);
 	return sk;
 }
 
 static inline void icmp_xmit_unlock(struct sock *sk)
 {
+	sock_net_set(sk, &init_net);
 	spin_unlock(&sk->sk_lock.slock);
 }
 
@@ -363,14 +355,13 @@ static int icmp_glue_bits(void *from, char *to, int offset, int len, int odd,
 	return 0;
 }
 
-static void icmp_push_reply(struct icmp_bxm *icmp_param,
+static void icmp_push_reply(struct sock *sk,
+			    struct icmp_bxm *icmp_param,
 			    struct flowi4 *fl4,
 			    struct ipcm_cookie *ipc, struct rtable **rt)
 {
-	struct sock *sk;
 	struct sk_buff *skb;
 
-	sk = icmp_sk(dev_net((*rt)->dst.dev));
 	if (ip_append_data(sk, fl4, icmp_glue_bits, icmp_param,
 			   icmp_param->data_len+icmp_param->head_len,
 			   icmp_param->head_len,
@@ -452,7 +443,7 @@ static void icmp_reply(struct icmp_bxm *icmp_param, struct sk_buff *skb)
 	if (IS_ERR(rt))
 		goto out_unlock;
 	if (icmpv4_xrlim_allow(net, rt, &fl4, type, code))
-		icmp_push_reply(icmp_param, &fl4, &ipc, &rt);
+		icmp_push_reply(sk, icmp_param, &fl4, &ipc, &rt);
 	ip_rt_put(rt);
 out_unlock:
 	icmp_xmit_unlock(sk);
@@ -766,7 +757,7 @@ void __icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info,
 	if (!fl4.saddr)
 		fl4.saddr = htonl(INADDR_DUMMY);
 
-	icmp_push_reply(&icmp_param, &fl4, &ipc, &rt);
+	icmp_push_reply(sk, &icmp_param, &fl4, &ipc, &rt);
 ende:
 	ip_rt_put(rt);
 out_unlock:
@@ -1434,46 +1425,8 @@ static const struct icmp_control icmp_pointers[NR_ICMP_TYPES + 1] = {
 	},
 };
 
-static void __net_exit icmp_sk_exit(struct net *net)
-{
-	int i;
-
-	for_each_possible_cpu(i)
-		inet_ctl_sock_destroy(*per_cpu_ptr(net->ipv4.icmp_sk, i));
-	free_percpu(net->ipv4.icmp_sk);
-	net->ipv4.icmp_sk = NULL;
-}
-
 static int __net_init icmp_sk_init(struct net *net)
 {
-	int i, err;
-
-	net->ipv4.icmp_sk = alloc_percpu(struct sock *);
-	if (!net->ipv4.icmp_sk)
-		return -ENOMEM;
-
-	for_each_possible_cpu(i) {
-		struct sock *sk;
-
-		err = inet_ctl_sock_create(&sk, PF_INET,
-					   SOCK_RAW, IPPROTO_ICMP, net);
-		if (err < 0)
-			goto fail;
-
-		*per_cpu_ptr(net->ipv4.icmp_sk, i) = sk;
-
-		/* Enough space for 2 64K ICMP packets, including
-		 * sk_buff/skb_shared_info struct overhead.
-		 */
-		sk->sk_sndbuf =	2 * SKB_TRUESIZE(64 * 1024);
-
-		/*
-		 * Speedup sock_wfree()
-		 */
-		sock_set_flag(sk, SOCK_USE_WRITE_QUEUE);
-		inet_sk(sk)->pmtudisc = IP_PMTUDISC_DONT;
-	}
-
 	/* Control parameters for ECHO replies. */
 	net->ipv4.sysctl_icmp_echo_ignore_all = 0;
 	net->ipv4.sysctl_icmp_echo_enable_probe = 0;
@@ -1499,18 +1452,36 @@ static int __net_init icmp_sk_init(struct net *net)
 	net->ipv4.sysctl_icmp_errors_use_inbound_ifaddr = 0;
 
 	return 0;
-
-fail:
-	icmp_sk_exit(net);
-	return err;
 }
 
 static struct pernet_operations __net_initdata icmp_sk_ops = {
        .init = icmp_sk_init,
-       .exit = icmp_sk_exit,
 };
 
 int __init icmp_init(void)
 {
+	int err, i;
+
+	for_each_possible_cpu(i) {
+		struct sock *sk;
+
+		err = inet_ctl_sock_create(&sk, PF_INET,
+					   SOCK_RAW, IPPROTO_ICMP, &init_net);
+		if (err < 0)
+			return err;
+
+		per_cpu(ipv4_icmp_sk, i) = sk;
+
+		/* Enough space for 2 64K ICMP packets, including
+		 * sk_buff/skb_shared_info struct overhead.
+		 */
+		sk->sk_sndbuf =	2 * SKB_TRUESIZE(64 * 1024);
+
+		/*
+		 * Speedup sock_wfree()
+		 */
+		sock_set_flag(sk, SOCK_USE_WRITE_QUEUE);
+		inet_sk(sk)->pmtudisc = IP_PMTUDISC_DONT;
+	}
 	return register_pernet_subsys(&icmp_sk_ops);
 }
diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index fc2a985f6064..1e5b53c2bb26 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -866,12 +866,9 @@ static void reqsk_timer_handler(struct timer_list *t)
 	    (!resend ||
 	     !inet_rtx_syn_ack(sk_listener, req) ||
 	     inet_rsk(req)->acked)) {
-		unsigned long timeo;
-
 		if (req->num_timeout++ == 0)
 			atomic_dec(&queue->young);
-		timeo = min(TCP_TIMEOUT_INIT << req->num_timeout, TCP_RTO_MAX);
-		mod_timer(&req->rsk_timer, jiffies + timeo);
+		mod_timer(&req->rsk_timer, jiffies + reqsk_timeout(req, TCP_RTO_MAX));
 
 		if (!nreq)
 			return;
@@ -1046,6 +1043,9 @@ int inet_csk_listen_start(struct sock *sk)
 	sk->sk_ack_backlog = 0;
 	inet_csk_delack_init(sk);
 
+	if (sk->sk_txrehash == SOCK_TXREHASH_DEFAULT)
+		sk->sk_txrehash = READ_ONCE(sock_net(sk)->core.sysctl_txrehash);
+
 	/* There is race window here: we announce ourselves listening,
 	 * but this transition is still not validated by get_port().
 	 * It is OK, because this socket enters to hash table only
diff --git a/net/ipv4/inet_fragment.c b/net/ipv4/inet_fragment.c
index 341096807100..63948f6aeca0 100644
--- a/net/ipv4/inet_fragment.c
+++ b/net/ipv4/inet_fragment.c
@@ -572,6 +572,7 @@ void inet_frag_reasm_finish(struct inet_frag_queue *q, struct sk_buff *head,
 	skb_mark_not_on_list(head);
 	head->prev = NULL;
 	head->tstamp = q->stamp;
+	head->mono_delivery_time = q->mono_delivery_time;
 }
 EXPORT_SYMBOL(inet_frag_reasm_finish);
 
diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index 30ab717ff1b8..17440840a791 100644
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -637,7 +637,9 @@ int __inet_hash(struct sock *sk, struct sock *osk)
 	int err = 0;
 
 	if (sk->sk_state != TCP_LISTEN) {
+		local_bh_disable();
 		inet_ehash_nolisten(sk, osk, NULL);
+		local_bh_enable();
 		return 0;
 	}
 	WARN_ON(!sk_unhashed(sk));
@@ -669,45 +671,54 @@ int inet_hash(struct sock *sk)
 {
 	int err = 0;
 
-	if (sk->sk_state != TCP_CLOSE) {
-		local_bh_disable();
+	if (sk->sk_state != TCP_CLOSE)
 		err = __inet_hash(sk, NULL);
-		local_bh_enable();
-	}
 
 	return err;
 }
 EXPORT_SYMBOL_GPL(inet_hash);
 
-void inet_unhash(struct sock *sk)
+static void __inet_unhash(struct sock *sk, struct inet_listen_hashbucket *ilb)
 {
-	struct inet_hashinfo *hashinfo = sk->sk_prot->h.hashinfo;
-	struct inet_listen_hashbucket *ilb = NULL;
-	spinlock_t *lock;
-
 	if (sk_unhashed(sk))
 		return;
 
-	if (sk->sk_state == TCP_LISTEN) {
-		ilb = &hashinfo->listening_hash[inet_sk_listen_hashfn(sk)];
-		lock = &ilb->lock;
-	} else {
-		lock = inet_ehash_lockp(hashinfo, sk->sk_hash);
-	}
-	spin_lock_bh(lock);
-	if (sk_unhashed(sk))
-		goto unlock;
-
 	if (rcu_access_pointer(sk->sk_reuseport_cb))
 		reuseport_stop_listen_sock(sk);
 	if (ilb) {
+		struct inet_hashinfo *hashinfo = sk->sk_prot->h.hashinfo;
+
 		inet_unhash2(hashinfo, sk);
 		ilb->count--;
 	}
 	__sk_nulls_del_node_init_rcu(sk);
 	sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
-unlock:
-	spin_unlock_bh(lock);
+}
+
+void inet_unhash(struct sock *sk)
+{
+	struct inet_hashinfo *hashinfo = sk->sk_prot->h.hashinfo;
+
+	if (sk_unhashed(sk))
+		return;
+
+	if (sk->sk_state == TCP_LISTEN) {
+		struct inet_listen_hashbucket *ilb;
+
+		ilb = &hashinfo->listening_hash[inet_sk_listen_hashfn(sk)];
+		/* Don't disable bottom halves while acquiring the lock to
+		 * avoid circular locking dependency on PREEMPT_RT.
+		 */
+		spin_lock(&ilb->lock);
+		__inet_unhash(sk, ilb);
+		spin_unlock(&ilb->lock);
+	} else {
+		spinlock_t *lock = inet_ehash_lockp(hashinfo, sk->sk_hash);
+
+		spin_lock_bh(lock);
+		__inet_unhash(sk, NULL);
+		spin_unlock_bh(lock);
+	}
 }
 EXPORT_SYMBOL_GPL(inet_unhash);
 
diff --git a/net/ipv4/inet_timewait_sock.c b/net/ipv4/inet_timewait_sock.c
index 437afe392e66..9e0bbd026560 100644
--- a/net/ipv4/inet_timewait_sock.c
+++ b/net/ipv4/inet_timewait_sock.c
@@ -52,14 +52,15 @@ static void inet_twsk_kill(struct inet_timewait_sock *tw)
 	spin_unlock(lock);
 
 	/* Disassociate with bind bucket. */
-	bhead = &hashinfo->bhash[inet_bhashfn(twsk_net(tw), tw->tw_num,
-			hashinfo->bhash_size)];
+	bhead = &hashinfo->bhash[tw->tw_bslot];
 
 	spin_lock(&bhead->lock);
 	inet_twsk_bind_unhash(tw, hashinfo);
 	spin_unlock(&bhead->lock);
 
-	atomic_dec(&tw->tw_dr->tw_count);
+	if (refcount_dec_and_test(&tw->tw_dr->tw_refcount))
+		kfree(tw->tw_dr);
+
 	inet_twsk_put(tw);
 }
 
@@ -110,8 +111,12 @@ void inet_twsk_hashdance(struct inet_timewait_sock *tw, struct sock *sk,
 	   Note, that any socket with inet->num != 0 MUST be bound in
 	   binding cache, even if it is closed.
 	 */
-	bhead = &hashinfo->bhash[inet_bhashfn(twsk_net(tw), inet->inet_num,
-			hashinfo->bhash_size)];
+	/* Cache inet_bhashfn(), because 'struct net' might be no longer
+	 * available later in inet_twsk_kill().
+	 */
+	tw->tw_bslot = inet_bhashfn(twsk_net(tw), inet->inet_num,
+				    hashinfo->bhash_size);
+	bhead = &hashinfo->bhash[tw->tw_bslot];
 	spin_lock(&bhead->lock);
 	tw->tw_tb = icsk->icsk_bind_hash;
 	WARN_ON(!icsk->icsk_bind_hash);
@@ -145,10 +150,6 @@ static void tw_timer_handler(struct timer_list *t)
 {
 	struct inet_timewait_sock *tw = from_timer(tw, t, tw_timer);
 
-	if (tw->tw_kill)
-		__NET_INC_STATS(twsk_net(tw), LINUX_MIB_TIMEWAITKILLED);
-	else
-		__NET_INC_STATS(twsk_net(tw), LINUX_MIB_TIMEWAITED);
 	inet_twsk_kill(tw);
 }
 
@@ -158,7 +159,7 @@ struct inet_timewait_sock *inet_twsk_alloc(const struct sock *sk,
 {
 	struct inet_timewait_sock *tw;
 
-	if (atomic_read(&dr->tw_count) >= dr->sysctl_max_tw_buckets)
+	if (refcount_read(&dr->tw_refcount) - 1 >= dr->sysctl_max_tw_buckets)
 		return NULL;
 
 	tw = kmem_cache_alloc(sk->sk_prot_creator->twsk_prot->twsk_slab,
@@ -244,59 +245,15 @@ void __inet_twsk_schedule(struct inet_timewait_sock *tw, int timeo, bool rearm)
 	 * of PAWS.
 	 */
 
-	tw->tw_kill = timeo <= 4*HZ;
 	if (!rearm) {
+		bool kill = timeo <= 4*HZ;
+
+		__NET_INC_STATS(twsk_net(tw), kill ? LINUX_MIB_TIMEWAITKILLED :
+						     LINUX_MIB_TIMEWAITED);
 		BUG_ON(mod_timer(&tw->tw_timer, jiffies + timeo));
-		atomic_inc(&tw->tw_dr->tw_count);
+		refcount_inc(&tw->tw_dr->tw_refcount);
 	} else {
 		mod_timer_pending(&tw->tw_timer, jiffies + timeo);
 	}
 }
 EXPORT_SYMBOL_GPL(__inet_twsk_schedule);
-
-void inet_twsk_purge(struct inet_hashinfo *hashinfo, int family)
-{
-	struct inet_timewait_sock *tw;
-	struct sock *sk;
-	struct hlist_nulls_node *node;
-	unsigned int slot;
-
-	for (slot = 0; slot <= hashinfo->ehash_mask; slot++) {
-		struct inet_ehash_bucket *head = &hashinfo->ehash[slot];
-restart_rcu:
-		cond_resched();
-		rcu_read_lock();
-restart:
-		sk_nulls_for_each_rcu(sk, node, &head->chain) {
-			if (sk->sk_state != TCP_TIME_WAIT)
-				continue;
-			tw = inet_twsk(sk);
-			if ((tw->tw_family != family) ||
-				refcount_read(&twsk_net(tw)->ns.count))
-				continue;
-
-			if (unlikely(!refcount_inc_not_zero(&tw->tw_refcnt)))
-				continue;
-
-			if (unlikely((tw->tw_family != family) ||
-				     refcount_read(&twsk_net(tw)->ns.count))) {
-				inet_twsk_put(tw);
-				goto restart;
-			}
-
-			rcu_read_unlock();
-			local_bh_disable();
-			inet_twsk_deschedule_put(tw);
-			local_bh_enable();
-			goto restart_rcu;
-		}
-		/* If the nulls value we got at the end of this lookup is
-		 * not the expected one, we must restart lookup.
-		 * We probably met an item that was moved to another chain.
-		 */
-		if (get_nulls_value(node) != slot)
-			goto restart;
-		rcu_read_unlock();
-	}
-}
-EXPORT_SYMBOL_GPL(inet_twsk_purge);
diff --git a/net/ipv4/ip_forward.c b/net/ipv4/ip_forward.c
index 00ec819f949b..92ba3350274b 100644
--- a/net/ipv4/ip_forward.c
+++ b/net/ipv4/ip_forward.c
@@ -79,7 +79,7 @@ static int ip_forward_finish(struct net *net, struct sock *sk, struct sk_buff *s
 	if (unlikely(opt->optlen))
 		ip_forward_options(skb);
 
-	skb->tstamp = 0;
+	skb_clear_tstamp(skb);
 	return dst_output(net, sk, skb);
 }
 
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index fad803d2d711..fb153569889e 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -349,6 +349,7 @@ static int ip_frag_queue(struct ipq *qp, struct sk_buff *skb)
 		qp->iif = dev->ifindex;
 
 	qp->q.stamp = skb->tstamp;
+	qp->q.mono_delivery_time = skb->mono_delivery_time;
 	qp->q.meat += skb->len;
 	qp->ecn |= ecn;
 	add_frag_mem_limit(qp->q.fqdir, skb->truesize);
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index 3a025c011971..95f7bb052784 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -196,7 +196,8 @@ resubmit:
 	if (ipprot) {
 		if (!ipprot->no_policy) {
 			if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) {
-				kfree_skb(skb);
+				kfree_skb_reason(skb,
+						 SKB_DROP_REASON_XFRM_POLICY);
 				return;
 			}
 			nf_reset_ct(skb);
@@ -215,7 +216,7 @@ resubmit:
 				icmp_send(skb, ICMP_DEST_UNREACH,
 					  ICMP_PROT_UNREACH, 0);
 			}
-			kfree_skb(skb);
+			kfree_skb_reason(skb, SKB_DROP_REASON_IP_NOPROTO);
 		} else {
 			__IP_INC_STATS(net, IPSTATS_MIB_INDELIVERS);
 			consume_skb(skb);
@@ -225,6 +226,7 @@ resubmit:
 
 static int ip_local_deliver_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
 {
+	skb_clear_delivery_time(skb);
 	__skb_pull(skb, skb_network_header_len(skb));
 
 	rcu_read_lock();
@@ -318,8 +320,10 @@ static int ip_rcv_finish_core(struct net *net, struct sock *sk,
 {
 	const struct iphdr *iph = ip_hdr(skb);
 	int (*edemux)(struct sk_buff *skb);
+	int err, drop_reason;
 	struct rtable *rt;
-	int err;
+
+	drop_reason = SKB_DROP_REASON_NOT_SPECIFIED;
 
 	if (ip_can_use_hint(skb, iph, hint)) {
 		err = ip_route_use_hint(skb, iph->daddr, iph->saddr, iph->tos,
@@ -396,19 +400,23 @@ static int ip_rcv_finish_core(struct net *net, struct sock *sk,
 		 * so-called "hole-196" attack) so do it for both.
 		 */
 		if (in_dev &&
-		    IN_DEV_ORCONF(in_dev, DROP_UNICAST_IN_L2_MULTICAST))
+		    IN_DEV_ORCONF(in_dev, DROP_UNICAST_IN_L2_MULTICAST)) {
+			drop_reason = SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST;
 			goto drop;
+		}
 	}
 
 	return NET_RX_SUCCESS;
 
 drop:
-	kfree_skb(skb);
+	kfree_skb_reason(skb, drop_reason);
 	return NET_RX_DROP;
 
 drop_error:
-	if (err == -EXDEV)
+	if (err == -EXDEV) {
+		drop_reason = SKB_DROP_REASON_IP_RPFILTER;
 		__NET_INC_STATS(net, LINUX_MIB_IPRPFILTER);
+	}
 	goto drop;
 }
 
@@ -436,13 +444,16 @@ static int ip_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
 static struct sk_buff *ip_rcv_core(struct sk_buff *skb, struct net *net)
 {
 	const struct iphdr *iph;
+	int drop_reason;
 	u32 len;
 
 	/* When the interface is in promisc. mode, drop all the crap
 	 * that it receives, do not try to analyse it.
 	 */
-	if (skb->pkt_type == PACKET_OTHERHOST)
+	if (skb->pkt_type == PACKET_OTHERHOST) {
+		drop_reason = SKB_DROP_REASON_OTHERHOST;
 		goto drop;
+	}
 
 	__IP_UPD_PO_STATS(net, IPSTATS_MIB_IN, skb->len);
 
@@ -452,6 +463,7 @@ static struct sk_buff *ip_rcv_core(struct sk_buff *skb, struct net *net)
 		goto out;
 	}
 
+	drop_reason = SKB_DROP_REASON_NOT_SPECIFIED;
 	if (!pskb_may_pull(skb, sizeof(struct iphdr)))
 		goto inhdr_error;
 
@@ -488,6 +500,7 @@ static struct sk_buff *ip_rcv_core(struct sk_buff *skb, struct net *net)
 
 	len = ntohs(iph->tot_len);
 	if (skb->len < len) {
+		drop_reason = SKB_DROP_REASON_PKT_TOO_SMALL;
 		__IP_INC_STATS(net, IPSTATS_MIB_INTRUNCATEDPKTS);
 		goto drop;
 	} else if (len < (iph->ihl*4))
@@ -516,11 +529,14 @@ static struct sk_buff *ip_rcv_core(struct sk_buff *skb, struct net *net)
 	return skb;
 
 csum_error:
+	drop_reason = SKB_DROP_REASON_IP_CSUM;
 	__IP_INC_STATS(net, IPSTATS_MIB_CSUMERRORS);
 inhdr_error:
+	if (drop_reason == SKB_DROP_REASON_NOT_SPECIFIED)
+		drop_reason = SKB_DROP_REASON_IP_INHDR;
 	__IP_INC_STATS(net, IPSTATS_MIB_INHDRERRORS);
 drop:
-	kfree_skb(skb);
+	kfree_skb_reason(skb, drop_reason);
 out:
 	return NULL;
 }
diff --git a/net/ipv4/ip_options.c b/net/ipv4/ip_options.c
index da1b5038bdfd..a9e22a098872 100644
--- a/net/ipv4/ip_options.c
+++ b/net/ipv4/ip_options.c
@@ -42,7 +42,7 @@
  */
 
 void ip_options_build(struct sk_buff *skb, struct ip_options *opt,
-		      __be32 daddr, struct rtable *rt, int is_frag)
+		      __be32 daddr, struct rtable *rt)
 {
 	unsigned char *iph = skb_network_header(skb);
 
@@ -53,28 +53,15 @@ void ip_options_build(struct sk_buff *skb, struct ip_options *opt,
 	if (opt->srr)
 		memcpy(iph + opt->srr + iph[opt->srr + 1] - 4, &daddr, 4);
 
-	if (!is_frag) {
-		if (opt->rr_needaddr)
-			ip_rt_get_source(iph + opt->rr + iph[opt->rr + 2] - 5, skb, rt);
-		if (opt->ts_needaddr)
-			ip_rt_get_source(iph + opt->ts + iph[opt->ts + 2] - 9, skb, rt);
-		if (opt->ts_needtime) {
-			__be32 midtime;
+	if (opt->rr_needaddr)
+		ip_rt_get_source(iph + opt->rr + iph[opt->rr + 2] - 5, skb, rt);
+	if (opt->ts_needaddr)
+		ip_rt_get_source(iph + opt->ts + iph[opt->ts + 2] - 9, skb, rt);
+	if (opt->ts_needtime) {
+		__be32 midtime;
 
-			midtime = inet_current_timestamp();
-			memcpy(iph + opt->ts + iph[opt->ts + 2] - 5, &midtime, 4);
-		}
-		return;
-	}
-	if (opt->rr) {
-		memset(iph + opt->rr, IPOPT_NOP, iph[opt->rr + 1]);
-		opt->rr = 0;
-		opt->rr_needaddr = 0;
-	}
-	if (opt->ts) {
-		memset(iph + opt->ts, IPOPT_NOP, iph[opt->ts + 1]);
-		opt->ts = 0;
-		opt->ts_needaddr = opt->ts_needtime = 0;
+		midtime = inet_current_timestamp();
+		memcpy(iph + opt->ts + iph[opt->ts + 2] - 5, &midtime, 4);
 	}
 }
 
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 7911916a480b..00b4bf26fd93 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -179,7 +179,7 @@ int ip_build_and_send_pkt(struct sk_buff *skb, const struct sock *sk,
 
 	if (opt && opt->opt.optlen) {
 		iph->ihl += opt->opt.optlen>>2;
-		ip_options_build(skb, &opt->opt, daddr, rt, 0);
+		ip_options_build(skb, &opt->opt, daddr, rt);
 	}
 
 	skb->priority = sk->sk_priority;
@@ -233,7 +233,7 @@ static int ip_finish_output2(struct net *net, struct sock *sk, struct sk_buff *s
 
 	net_dbg_ratelimited("%s: No header cache and no neighbour!\n",
 			    __func__);
-	kfree_skb(skb);
+	kfree_skb_reason(skb, SKB_DROP_REASON_NEIGH_CREATEFAIL);
 	return -EINVAL;
 }
 
@@ -317,7 +317,7 @@ static int ip_finish_output(struct net *net, struct sock *sk, struct sk_buff *sk
 	case NET_XMIT_CN:
 		return __ip_finish_output(net, sk, skb) ? : ret;
 	default:
-		kfree_skb(skb);
+		kfree_skb_reason(skb, SKB_DROP_REASON_BPF_CGROUP_EGRESS);
 		return ret;
 	}
 }
@@ -337,7 +337,7 @@ static int ip_mc_finish_output(struct net *net, struct sock *sk,
 	case NET_XMIT_SUCCESS:
 		break;
 	default:
-		kfree_skb(skb);
+		kfree_skb_reason(skb, SKB_DROP_REASON_BPF_CGROUP_EGRESS);
 		return ret;
 	}
 
@@ -519,7 +519,7 @@ packet_routed:
 
 	if (inet_opt && inet_opt->opt.optlen) {
 		iph->ihl += inet_opt->opt.optlen >> 2;
-		ip_options_build(skb, &inet_opt->opt, inet->inet_daddr, rt, 0);
+		ip_options_build(skb, &inet_opt->opt, inet->inet_daddr, rt);
 	}
 
 	ip_select_ident_segs(net, skb, sk,
@@ -536,7 +536,7 @@ packet_routed:
 no_route:
 	rcu_read_unlock();
 	IP_INC_STATS(net, IPSTATS_MIB_OUTNOROUTES);
-	kfree_skb(skb);
+	kfree_skb_reason(skb, SKB_DROP_REASON_IP_OUTNOROUTES);
 	return -EHOSTUNREACH;
 }
 EXPORT_SYMBOL(__ip_queue_xmit);
@@ -761,6 +761,7 @@ int ip_do_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
 {
 	struct iphdr *iph;
 	struct sk_buff *skb2;
+	bool mono_delivery_time = skb->mono_delivery_time;
 	struct rtable *rt = skb_rtable(skb);
 	unsigned int mtu, hlen, ll_rs;
 	struct ip_fraglist_iter iter;
@@ -852,7 +853,7 @@ int ip_do_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
 				}
 			}
 
-			skb->tstamp = tstamp;
+			skb_set_delivery_time(skb, tstamp, mono_delivery_time);
 			err = output(net, sk, skb);
 
 			if (!err)
@@ -908,7 +909,7 @@ slow_path:
 		/*
 		 *	Put this fragment into the sending queue.
 		 */
-		skb2->tstamp = tstamp;
+		skb_set_delivery_time(skb2, tstamp, mono_delivery_time);
 		err = output(net, sk, skb2);
 		if (err)
 			goto fail;
@@ -1541,7 +1542,7 @@ struct sk_buff *__ip_make_skb(struct sock *sk,
 
 	if (opt) {
 		iph->ihl += opt->optlen >> 2;
-		ip_options_build(skb, opt, cork->addr, rt, 0);
+		ip_options_build(skb, opt, cork->addr, rt);
 	}
 
 	skb->priority = (cork->tos != -1) ? cork->priority: sk->sk_priority;
@@ -1727,6 +1728,7 @@ void ip_send_unicast_reply(struct sock *sk, struct sk_buff *skb,
 			  arg->csumoffset) = csum_fold(csum_add(nskb->csum,
 								arg->csum));
 		nskb->ip_summed = CHECKSUM_NONE;
+		nskb->mono_delivery_time = !!transmit_time;
 		ip_push_pending_frames(sk, &fl4);
 	}
 out:
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 29bbe2b08ae9..c860519d57ee 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -268,13 +268,12 @@ static void __net_exit ipmr_rules_exit(struct net *net)
 {
 	struct mr_table *mrt, *next;
 
-	rtnl_lock();
+	ASSERT_RTNL();
 	list_for_each_entry_safe(mrt, next, &net->ipv4.mr_tables, list) {
 		list_del(&mrt->list);
 		ipmr_free_table(mrt);
 	}
 	fib_rules_unregister(net->ipv4.mr_rules_ops);
-	rtnl_unlock();
 }
 
 static int ipmr_rules_dump(struct net *net, struct notifier_block *nb,
@@ -330,10 +329,9 @@ static int __net_init ipmr_rules_init(struct net *net)
 
 static void __net_exit ipmr_rules_exit(struct net *net)
 {
-	rtnl_lock();
+	ASSERT_RTNL();
 	ipmr_free_table(net->ipv4.mrt);
 	net->ipv4.mrt = NULL;
-	rtnl_unlock();
 }
 
 static int ipmr_rules_dump(struct net *net, struct notifier_block *nb,
@@ -3077,7 +3075,9 @@ static int __net_init ipmr_net_init(struct net *net)
 proc_cache_fail:
 	remove_proc_entry("ip_mr_vif", net->proc_net);
 proc_vif_fail:
+	rtnl_lock();
 	ipmr_rules_exit(net);
+	rtnl_unlock();
 #endif
 ipmr_rules_fail:
 	ipmr_notifier_exit(net);
@@ -3092,12 +3092,22 @@ static void __net_exit ipmr_net_exit(struct net *net)
 	remove_proc_entry("ip_mr_vif", net->proc_net);
 #endif
 	ipmr_notifier_exit(net);
-	ipmr_rules_exit(net);
+}
+
+static void __net_exit ipmr_net_exit_batch(struct list_head *net_list)
+{
+	struct net *net;
+
+	rtnl_lock();
+	list_for_each_entry(net, net_list, exit_list)
+		ipmr_rules_exit(net);
+	rtnl_unlock();
 }
 
 static struct pernet_operations ipmr_net_ops = {
 	.init = ipmr_net_init,
 	.exit = ipmr_net_exit,
+	.exit_batch = ipmr_net_exit_batch,
 };
 
 int __init ip_mr_init(void)
diff --git a/net/ipv4/netfilter/nf_nat_h323.c b/net/ipv4/netfilter/nf_nat_h323.c
index 3e2685c120c7..76a411ae9fe6 100644
--- a/net/ipv4/netfilter/nf_nat_h323.c
+++ b/net/ipv4/netfilter/nf_nat_h323.c
@@ -580,7 +580,7 @@ static struct nf_ct_helper_expectfn callforwarding_nat = {
 };
 
 /****************************************************************************/
-static int __init init(void)
+static int __init nf_nat_h323_init(void)
 {
 	BUG_ON(set_h245_addr_hook != NULL);
 	BUG_ON(set_h225_addr_hook != NULL);
@@ -607,7 +607,7 @@ static int __init init(void)
 }
 
 /****************************************************************************/
-static void __exit fini(void)
+static void __exit nf_nat_h323_fini(void)
 {
 	RCU_INIT_POINTER(set_h245_addr_hook, NULL);
 	RCU_INIT_POINTER(set_h225_addr_hook, NULL);
@@ -624,8 +624,8 @@ static void __exit fini(void)
 }
 
 /****************************************************************************/
-module_init(init);
-module_exit(fini);
+module_init(nf_nat_h323_init);
+module_exit(nf_nat_h323_fini);
 
 MODULE_AUTHOR("Jing Min Zhao <zhaojingmin@users.sourceforge.net>");
 MODULE_DESCRIPTION("H.323 NAT helper");
diff --git a/net/ipv4/netfilter/nf_nat_pptp.c b/net/ipv4/netfilter/nf_nat_pptp.c
index 3f248a19faa3..fab357cc8559 100644
--- a/net/ipv4/netfilter/nf_nat_pptp.c
+++ b/net/ipv4/netfilter/nf_nat_pptp.c
@@ -295,28 +295,24 @@ pptp_inbound_pkt(struct sk_buff *skb,
 	return NF_ACCEPT;
 }
 
+static const struct nf_nat_pptp_hook pptp_hooks = {
+	.outbound = pptp_outbound_pkt,
+	.inbound = pptp_inbound_pkt,
+	.exp_gre = pptp_exp_gre,
+	.expectfn = pptp_nat_expected,
+};
+
 static int __init nf_nat_helper_pptp_init(void)
 {
-	BUG_ON(nf_nat_pptp_hook_outbound != NULL);
-	RCU_INIT_POINTER(nf_nat_pptp_hook_outbound, pptp_outbound_pkt);
-
-	BUG_ON(nf_nat_pptp_hook_inbound != NULL);
-	RCU_INIT_POINTER(nf_nat_pptp_hook_inbound, pptp_inbound_pkt);
-
-	BUG_ON(nf_nat_pptp_hook_exp_gre != NULL);
-	RCU_INIT_POINTER(nf_nat_pptp_hook_exp_gre, pptp_exp_gre);
+	WARN_ON(nf_nat_pptp_hook != NULL);
+	RCU_INIT_POINTER(nf_nat_pptp_hook, &pptp_hooks);
 
-	BUG_ON(nf_nat_pptp_hook_expectfn != NULL);
-	RCU_INIT_POINTER(nf_nat_pptp_hook_expectfn, pptp_nat_expected);
 	return 0;
 }
 
 static void __exit nf_nat_helper_pptp_fini(void)
 {
-	RCU_INIT_POINTER(nf_nat_pptp_hook_expectfn, NULL);
-	RCU_INIT_POINTER(nf_nat_pptp_hook_exp_gre, NULL);
-	RCU_INIT_POINTER(nf_nat_pptp_hook_inbound, NULL);
-	RCU_INIT_POINTER(nf_nat_pptp_hook_outbound, NULL);
+	RCU_INIT_POINTER(nf_nat_pptp_hook, NULL);
 	synchronize_rcu();
 }
 
diff --git a/net/ipv4/netfilter/nft_dup_ipv4.c b/net/ipv4/netfilter/nft_dup_ipv4.c
index aeb631760eb9..0bcd6aee6000 100644
--- a/net/ipv4/netfilter/nft_dup_ipv4.c
+++ b/net/ipv4/netfilter/nft_dup_ipv4.c
@@ -75,6 +75,7 @@ static const struct nft_expr_ops nft_dup_ipv4_ops = {
 	.eval		= nft_dup_ipv4_eval,
 	.init		= nft_dup_ipv4_init,
 	.dump		= nft_dup_ipv4_dump,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static const struct nla_policy nft_dup_ipv4_policy[NFTA_DUP_MAX + 1] = {
diff --git a/net/ipv4/netfilter/nft_fib_ipv4.c b/net/ipv4/netfilter/nft_fib_ipv4.c
index 03df986217b7..4151eb1262dd 100644
--- a/net/ipv4/netfilter/nft_fib_ipv4.c
+++ b/net/ipv4/netfilter/nft_fib_ipv4.c
@@ -152,6 +152,7 @@ static const struct nft_expr_ops nft_fib4_type_ops = {
 	.init		= nft_fib_init,
 	.dump		= nft_fib_dump,
 	.validate	= nft_fib_validate,
+	.reduce		= nft_fib_reduce,
 };
 
 static const struct nft_expr_ops nft_fib4_ops = {
@@ -161,6 +162,7 @@ static const struct nft_expr_ops nft_fib4_ops = {
 	.init		= nft_fib_init,
 	.dump		= nft_fib_dump,
 	.validate	= nft_fib_validate,
+	.reduce		= nft_fib_reduce,
 };
 
 static const struct nft_expr_ops *
diff --git a/net/ipv4/netfilter/nft_reject_ipv4.c b/net/ipv4/netfilter/nft_reject_ipv4.c
index 55fc23a8f7a7..6cb213bb7256 100644
--- a/net/ipv4/netfilter/nft_reject_ipv4.c
+++ b/net/ipv4/netfilter/nft_reject_ipv4.c
@@ -45,6 +45,7 @@ static const struct nft_expr_ops nft_reject_ipv4_ops = {
 	.init		= nft_reject_init,
 	.dump		= nft_reject_dump,
 	.validate	= nft_reject_validate,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static struct nft_expr_type nft_reject_ipv4_type __read_mostly = {
diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c
index eeafeccebb8d..e459a391e607 100644
--- a/net/ipv4/nexthop.c
+++ b/net/ipv4/nexthop.c
@@ -3733,12 +3733,16 @@ out:
 }
 EXPORT_SYMBOL(nexthop_res_grp_activity_update);
 
-static void __net_exit nexthop_net_exit(struct net *net)
+static void __net_exit nexthop_net_exit_batch(struct list_head *net_list)
 {
+	struct net *net;
+
 	rtnl_lock();
-	flush_all_nexthops(net);
+	list_for_each_entry(net, net_list, exit_list) {
+		flush_all_nexthops(net);
+		kfree(net->nexthop.devhash);
+	}
 	rtnl_unlock();
-	kfree(net->nexthop.devhash);
 }
 
 static int __net_init nexthop_net_init(struct net *net)
@@ -3756,7 +3760,7 @@ static int __net_init nexthop_net_init(struct net *net)
 
 static struct pernet_operations nexthop_net_ops = {
 	.init = nexthop_net_init,
-	.exit = nexthop_net_exit,
+	.exit_batch = nexthop_net_exit_batch,
 };
 
 static int __init nexthop_init(void)
diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c
index f30273afb539..28836071f0a6 100644
--- a/net/ipv4/proc.c
+++ b/net/ipv4/proc.c
@@ -59,8 +59,8 @@ static int sockstat_seq_show(struct seq_file *seq, void *v)
 	socket_seq_show(seq);
 	seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",
 		   sock_prot_inuse_get(net, &tcp_prot), orphans,
-		   atomic_read(&net->ipv4.tcp_death_row.tw_count), sockets,
-		   proto_memory_allocated(&tcp_prot));
+		   refcount_read(&net->ipv4.tcp_death_row->tw_refcount) - 1,
+		   sockets, proto_memory_allocated(&tcp_prot));
 	seq_printf(seq, "UDP: inuse %d mem %ld\n",
 		   sock_prot_inuse_get(net, &udp_prot),
 		   proto_memory_allocated(&udp_prot));
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index f33ad1f383b6..98c6f3429593 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -84,6 +84,7 @@
 #include <linux/jhash.h>
 #include <net/dst.h>
 #include <net/dst_metadata.h>
+#include <net/inet_dscp.h>
 #include <net/net_namespace.h>
 #include <net/ip.h>
 #include <net/route.h>
@@ -112,14 +113,13 @@
 
 #define DEFAULT_MIN_PMTU (512 + 20 + 20)
 #define DEFAULT_MTU_EXPIRES (10 * 60 * HZ)
-
+#define DEFAULT_MIN_ADVMSS 256
 static int ip_rt_max_size;
 static int ip_rt_redirect_number __read_mostly	= 9;
 static int ip_rt_redirect_load __read_mostly	= HZ / 50;
 static int ip_rt_redirect_silence __read_mostly	= ((HZ / 50) << (9 + 1));
 static int ip_rt_error_cost __read_mostly	= HZ;
 static int ip_rt_error_burst __read_mostly	= 5 * HZ;
-static int ip_rt_min_advmss __read_mostly	= 256;
 
 static int ip_rt_gc_timeout __read_mostly	= RT_GC_TIMEOUT;
 
@@ -458,7 +458,7 @@ static u32 *ip_tstamps __read_mostly;
  * if one generator is seldom used. This makes hard for an attacker
  * to infer how many packets were sent between two points in time.
  */
-u32 ip_idents_reserve(u32 hash, int segs)
+static u32 ip_idents_reserve(u32 hash, int segs)
 {
 	u32 bucket, old, now = (u32)jiffies;
 	atomic_t *p_id;
@@ -479,7 +479,6 @@ u32 ip_idents_reserve(u32 hash, int segs)
 	 */
 	return atomic_add_return(segs + delta, p_id) - segs;
 }
-EXPORT_SYMBOL(ip_idents_reserve);
 
 void __ip_select_ident(struct net *net, struct iphdr *iph, int segs)
 {
@@ -499,6 +498,15 @@ void __ip_select_ident(struct net *net, struct iphdr *iph, int segs)
 }
 EXPORT_SYMBOL(__ip_select_ident);
 
+static void ip_rt_fix_tos(struct flowi4 *fl4)
+{
+	__u8 tos = RT_FL_TOS(fl4);
+
+	fl4->flowi4_tos = tos & IPTOS_RT_MASK;
+	fl4->flowi4_scope = tos & RTO_ONLINK ?
+			    RT_SCOPE_LINK : RT_SCOPE_UNIVERSE;
+}
+
 static void __build_flow_key(const struct net *net, struct flowi4 *fl4,
 			     const struct sock *sk,
 			     const struct iphdr *iph,
@@ -824,6 +832,7 @@ static void ip_do_redirect(struct dst_entry *dst, struct sock *sk, struct sk_buf
 	rt = (struct rtable *) dst;
 
 	__build_flow_key(net, &fl4, sk, iph, oif, tos, prot, mark, 0);
+	ip_rt_fix_tos(&fl4);
 	__ip_do_redirect(rt, skb, &fl4, true);
 }
 
@@ -1048,6 +1057,7 @@ static void ip_rt_update_pmtu(struct dst_entry *dst, struct sock *sk,
 	struct flowi4 fl4;
 
 	ip_rt_build_flow_key(&fl4, sk, skb);
+	ip_rt_fix_tos(&fl4);
 
 	/* Don't make lookup fail for bridged encapsulations */
 	if (skb && netif_is_any_bridge_port(skb->dev))
@@ -1122,6 +1132,8 @@ void ipv4_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, u32 mtu)
 			goto out;
 
 		new = true;
+	} else {
+		ip_rt_fix_tos(&fl4);
 	}
 
 	__ip_rt_update_pmtu((struct rtable *)xfrm_dst_path(&rt->dst), &fl4, mtu);
@@ -1298,9 +1310,10 @@ static void set_class_tag(struct rtable *rt, u32 tag)
 
 static unsigned int ipv4_default_advmss(const struct dst_entry *dst)
 {
+	struct net *net = dev_net(dst->dev);
 	unsigned int header_size = sizeof(struct tcphdr) + sizeof(struct iphdr);
 	unsigned int advmss = max_t(unsigned int, ipv4_mtu(dst) - header_size,
-				    ip_rt_min_advmss);
+				    net->ipv4.ip_rt_min_advmss);
 
 	return min(advmss, IPV4_MAX_PMTU - header_size);
 }
@@ -1485,6 +1498,7 @@ static bool rt_cache_route(struct fib_nh_common *nhc, struct rtable *rt)
 struct uncached_list {
 	spinlock_t		lock;
 	struct list_head	head;
+	struct list_head	quarantine;
 };
 
 static DEFINE_PER_CPU_ALIGNED(struct uncached_list, rt_uncached_list);
@@ -1506,7 +1520,7 @@ void rt_del_uncached_list(struct rtable *rt)
 		struct uncached_list *ul = rt->rt_uncached_list;
 
 		spin_lock_bh(&ul->lock);
-		list_del(&rt->rt_uncached);
+		list_del_init(&rt->rt_uncached);
 		spin_unlock_bh(&ul->lock);
 	}
 }
@@ -1521,20 +1535,24 @@ static void ipv4_dst_destroy(struct dst_entry *dst)
 
 void rt_flush_dev(struct net_device *dev)
 {
-	struct rtable *rt;
+	struct rtable *rt, *safe;
 	int cpu;
 
 	for_each_possible_cpu(cpu) {
 		struct uncached_list *ul = &per_cpu(rt_uncached_list, cpu);
 
+		if (list_empty(&ul->head))
+			continue;
+
 		spin_lock_bh(&ul->lock);
-		list_for_each_entry(rt, &ul->head, rt_uncached) {
+		list_for_each_entry_safe(rt, safe, &ul->head, rt_uncached) {
 			if (rt->dst.dev != dev)
 				continue;
 			rt->dst.dev = blackhole_netdev;
 			dev_replace_track(dev, blackhole_netdev,
 					  &rt->dst.dev_tracker,
 					  GFP_ATOMIC);
+			list_move(&rt->rt_uncached, &ul->quarantine);
 		}
 		spin_unlock_bh(&ul->lock);
 	}
@@ -2258,6 +2276,7 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
 	/*
 	 *	Now we are ready to route packet.
 	 */
+	fl4.flowi4_l3mdev = 0;
 	fl4.flowi4_oif = 0;
 	fl4.flowi4_iif = dev->ifindex;
 	fl4.flowi4_mark = skb->mark;
@@ -2603,7 +2622,6 @@ add:
 struct rtable *ip_route_output_key_hash(struct net *net, struct flowi4 *fl4,
 					const struct sk_buff *skb)
 {
-	__u8 tos = RT_FL_TOS(fl4);
 	struct fib_result res = {
 		.type		= RTN_UNSPEC,
 		.fi		= NULL,
@@ -2613,9 +2631,7 @@ struct rtable *ip_route_output_key_hash(struct net *net, struct flowi4 *fl4,
 	struct rtable *rth;
 
 	fl4->flowi4_iif = LOOPBACK_IFINDEX;
-	fl4->flowi4_tos = tos & IPTOS_RT_MASK;
-	fl4->flowi4_scope = ((tos & RTO_ONLINK) ?
-			 RT_SCOPE_LINK : RT_SCOPE_UNIVERSE);
+	ip_rt_fix_tos(fl4);
 
 	rcu_read_lock();
 	rth = ip_route_output_key_hash_rcu(net, fl4, &res, skb);
@@ -2733,8 +2749,7 @@ struct rtable *ip_route_output_key_hash_rcu(struct net *net, struct flowi4 *fl4,
 		res->fi = NULL;
 		res->table = NULL;
 		if (fl4->flowi4_oif &&
-		    (ipv4_is_multicast(fl4->daddr) ||
-		    !netif_index_is_l3_master(net, fl4->flowi4_oif))) {
+		    (ipv4_is_multicast(fl4->daddr) || !fl4->flowi4_l3mdev)) {
 			/* Apparently, routing tables are wrong. Assume,
 			 * that the destination is on link.
 			 *
@@ -3392,7 +3407,7 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh,
 
 				if (fa->fa_slen == slen &&
 				    fa->tb_id == fri.tb_id &&
-				    fa->fa_tos == fri.tos &&
+				    fa->fa_dscp == inet_dsfield_to_dscp(fri.tos) &&
 				    fa->fa_info == res.fi &&
 				    fa->fa_type == fri.type) {
 					fri.offload = READ_ONCE(fa->offload);
@@ -3535,13 +3550,6 @@ static struct ctl_table ipv4_route_table[] = {
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec,
 	},
-	{
-		.procname	= "min_adv_mss",
-		.data		= &ip_rt_min_advmss,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= proc_dointvec,
-	},
 	{ }
 };
 
@@ -3569,6 +3577,13 @@ static struct ctl_table ipv4_route_netns_table[] = {
 		.mode           = 0644,
 		.proc_handler   = proc_dointvec_jiffies,
 	},
+	{
+		.procname   = "min_adv_mss",
+		.data       = &init_net.ipv4.ip_rt_min_advmss,
+		.maxlen     = sizeof(int),
+		.mode       = 0644,
+		.proc_handler   = proc_dointvec,
+	},
 	{ },
 };
 
@@ -3631,6 +3646,7 @@ static __net_init int netns_ip_rt_init(struct net *net)
 	/* Set default value for namespaceified sysctls */
 	net->ipv4.ip_rt_min_pmtu = DEFAULT_MIN_PMTU;
 	net->ipv4.ip_rt_mtu_expires = DEFAULT_MTU_EXPIRES;
+	net->ipv4.ip_rt_min_advmss = DEFAULT_MIN_ADVMSS;
 	return 0;
 }
 
@@ -3705,6 +3721,7 @@ int __init ip_rt_init(void)
 		struct uncached_list *ul = &per_cpu(rt_uncached_list, cpu);
 
 		INIT_LIST_HEAD(&ul->head);
+		INIT_LIST_HEAD(&ul->quarantine);
 		spin_lock_init(&ul->lock);
 	}
 #ifdef CONFIG_IP_ROUTE_CLASSID
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 97eb54774924..ad80d180b60b 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -589,6 +589,14 @@ static struct ctl_table ipv4_table[] = {
 };
 
 static struct ctl_table ipv4_net_table[] = {
+	/* tcp_max_tw_buckets must be first in this table. */
+	{
+		.procname	= "tcp_max_tw_buckets",
+/*		.data		= &init_net.ipv4.tcp_death_row.sysctl_max_tw_buckets, */
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec
+	},
 	{
 		.procname	= "icmp_echo_ignore_all",
 		.data		= &init_net.ipv4.sysctl_icmp_echo_ignore_all,
@@ -1001,13 +1009,6 @@ static struct ctl_table ipv4_net_table[] = {
 		.extra2		= &two,
 	},
 	{
-		.procname	= "tcp_max_tw_buckets",
-		.data		= &init_net.ipv4.tcp_death_row.sysctl_max_tw_buckets,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= proc_dointvec
-	},
-	{
 		.procname	= "tcp_max_syn_backlog",
 		.data		= &init_net.ipv4.sysctl_max_syn_backlog,
 		.maxlen		= sizeof(int),
@@ -1271,6 +1272,13 @@ static struct ctl_table ipv4_net_table[] = {
 		.extra1		= SYSCTL_ONE,
 	},
 	{
+		.procname	= "tcp_tso_rtt_log",
+		.data		= &init_net.ipv4.sysctl_tcp_tso_rtt_log,
+		.maxlen		= sizeof(u8),
+		.mode		= 0644,
+		.proc_handler	= proc_dou8vec_minmax,
+	},
+	{
 		.procname	= "tcp_min_rtt_wlen",
 		.data		= &init_net.ipv4.sysctl_tcp_min_rtt_wlen,
 		.maxlen		= sizeof(int),
@@ -1400,7 +1408,8 @@ static __net_init int ipv4_sysctl_init_net(struct net *net)
 		if (!table)
 			goto err_alloc;
 
-		for (i = 0; i < ARRAY_SIZE(ipv4_net_table) - 1; i++) {
+		/* skip first entry (sysctl_max_tw_buckets) */
+		for (i = 1; i < ARRAY_SIZE(ipv4_net_table) - 1; i++) {
 			if (table[i].data) {
 				/* Update the variables to point into
 				 * the current struct net
@@ -1415,6 +1424,8 @@ static __net_init int ipv4_sysctl_init_net(struct net *net)
 		}
 	}
 
+	table[0].data = &net->ipv4.tcp_death_row->sysctl_max_tw_buckets;
+
 	net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table);
 	if (!net->ipv4.ipv4_hdr)
 		goto err_reg;
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 28ff2a820f7c..cf18fbcbf123 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -688,7 +688,8 @@ static bool tcp_should_autocork(struct sock *sk, struct sk_buff *skb,
 	return skb->len < size_goal &&
 	       sock_net(sk)->ipv4.sysctl_tcp_autocorking &&
 	       !tcp_rtx_queue_empty(sk) &&
-	       refcount_read(&sk->sk_wmem_alloc) > skb->truesize;
+	       refcount_read(&sk->sk_wmem_alloc) > skb->truesize &&
+	       tcp_skb_can_collapse_to(skb);
 }
 
 void tcp_push(struct sock *sk, int flags, int mss_now,
@@ -894,8 +895,7 @@ static unsigned int tcp_xmit_size_goal(struct sock *sk, u32 mss_now,
 		return mss_now;
 
 	/* Note : tcp_tso_autosize() will eventually split this later */
-	new_size_goal = sk->sk_gso_max_size - 1 - MAX_TCP_HEADER;
-	new_size_goal = tcp_bound_to_half_wnd(tp, new_size_goal);
+	new_size_goal = tcp_bound_to_half_wnd(tp, sk->sk_gso_max_size);
 
 	/* We try hard to avoid divides here */
 	size_goal = tp->gso_segs * mss_now;
@@ -4434,6 +4434,73 @@ int tcp_md5_hash_key(struct tcp_md5sig_pool *hp, const struct tcp_md5sig_key *ke
 }
 EXPORT_SYMBOL(tcp_md5_hash_key);
 
+/* Called with rcu_read_lock() */
+enum skb_drop_reason
+tcp_inbound_md5_hash(const struct sock *sk, const struct sk_buff *skb,
+		     const void *saddr, const void *daddr,
+		     int family, int dif, int sdif)
+{
+	/*
+	 * This gets called for each TCP segment that arrives
+	 * so we want to be efficient.
+	 * We have 3 drop cases:
+	 * o No MD5 hash and one expected.
+	 * o MD5 hash and we're not expecting one.
+	 * o MD5 hash and its wrong.
+	 */
+	const __u8 *hash_location = NULL;
+	struct tcp_md5sig_key *hash_expected;
+	const struct tcphdr *th = tcp_hdr(skb);
+	struct tcp_sock *tp = tcp_sk(sk);
+	int genhash, l3index;
+	u8 newhash[16];
+
+	/* sdif set, means packet ingressed via a device
+	 * in an L3 domain and dif is set to the l3mdev
+	 */
+	l3index = sdif ? dif : 0;
+
+	hash_expected = tcp_md5_do_lookup(sk, l3index, saddr, family);
+	hash_location = tcp_parse_md5sig_option(th);
+
+	/* We've parsed the options - do we have a hash? */
+	if (!hash_expected && !hash_location)
+		return SKB_NOT_DROPPED_YET;
+
+	if (hash_expected && !hash_location) {
+		NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMD5NOTFOUND);
+		return SKB_DROP_REASON_TCP_MD5NOTFOUND;
+	}
+
+	if (!hash_expected && hash_location) {
+		NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMD5UNEXPECTED);
+		return SKB_DROP_REASON_TCP_MD5UNEXPECTED;
+	}
+
+	/* check the signature */
+	genhash = tp->af_specific->calc_md5_hash(newhash, hash_expected,
+						 NULL, skb);
+
+	if (genhash || memcmp(hash_location, newhash, 16) != 0) {
+		NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMD5FAILURE);
+		if (family == AF_INET) {
+			net_info_ratelimited("MD5 Hash failed for (%pI4, %d)->(%pI4, %d)%s L3 index %d\n",
+					saddr, ntohs(th->source),
+					daddr, ntohs(th->dest),
+					genhash ? " tcp_v4_calc_md5_hash failed"
+					: "", l3index);
+		} else {
+			net_info_ratelimited("MD5 Hash %s for [%pI6c]:%u->[%pI6c]:%u L3 index %d\n",
+					genhash ? "failed" : "mismatch",
+					saddr, ntohs(th->source),
+					daddr, ntohs(th->dest), l3index);
+		}
+		return SKB_DROP_REASON_TCP_MD5FAILURE;
+	}
+	return SKB_NOT_DROPPED_YET;
+}
+EXPORT_SYMBOL(tcp_inbound_md5_hash);
+
 #endif
 
 void tcp_done(struct sock *sk)
diff --git a/net/ipv4/tcp_bbr.c b/net/ipv4/tcp_bbr.c
index ec5550089b4d..02e8626ccb27 100644
--- a/net/ipv4/tcp_bbr.c
+++ b/net/ipv4/tcp_bbr.c
@@ -1154,7 +1154,7 @@ static struct tcp_congestion_ops tcp_bbr_cong_ops __read_mostly = {
 	.set_state	= bbr_set_state,
 };
 
-BTF_SET_START(tcp_bbr_kfunc_ids)
+BTF_SET_START(tcp_bbr_check_kfunc_ids)
 #ifdef CONFIG_X86
 #ifdef CONFIG_DYNAMIC_FTRACE
 BTF_ID(func, bbr_init)
@@ -1167,25 +1167,27 @@ BTF_ID(func, bbr_min_tso_segs)
 BTF_ID(func, bbr_set_state)
 #endif
 #endif
-BTF_SET_END(tcp_bbr_kfunc_ids)
+BTF_SET_END(tcp_bbr_check_kfunc_ids)
 
-static DEFINE_KFUNC_BTF_ID_SET(&tcp_bbr_kfunc_ids, tcp_bbr_kfunc_btf_set);
+static const struct btf_kfunc_id_set tcp_bbr_kfunc_set = {
+	.owner     = THIS_MODULE,
+	.check_set = &tcp_bbr_check_kfunc_ids,
+};
 
 static int __init bbr_register(void)
 {
 	int ret;
 
 	BUILD_BUG_ON(sizeof(struct bbr) > ICSK_CA_PRIV_SIZE);
-	ret = tcp_register_congestion_control(&tcp_bbr_cong_ops);
-	if (ret)
+
+	ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_STRUCT_OPS, &tcp_bbr_kfunc_set);
+	if (ret < 0)
 		return ret;
-	register_kfunc_btf_id_set(&bpf_tcp_ca_kfunc_list, &tcp_bbr_kfunc_btf_set);
-	return 0;
+	return tcp_register_congestion_control(&tcp_bbr_cong_ops);
 }
 
 static void __exit bbr_unregister(void)
 {
-	unregister_kfunc_btf_id_set(&bpf_tcp_ca_kfunc_list, &tcp_bbr_kfunc_btf_set);
 	tcp_unregister_congestion_control(&tcp_bbr_cong_ops);
 }
 
diff --git a/net/ipv4/tcp_bpf.c b/net/ipv4/tcp_bpf.c
index 9b9b02052fd3..1cdcb4df0eb7 100644
--- a/net/ipv4/tcp_bpf.c
+++ b/net/ipv4/tcp_bpf.c
@@ -138,10 +138,9 @@ int tcp_bpf_sendmsg_redir(struct sock *sk, struct sk_msg *msg,
 	struct sk_psock *psock = sk_psock_get(sk);
 	int ret;
 
-	if (unlikely(!psock)) {
-		sk_msg_free(sk, msg);
-		return 0;
-	}
+	if (unlikely(!psock))
+		return -EPIPE;
+
 	ret = ingress ? bpf_tcp_ingress(sk, psock, msg, bytes, flags) :
 			tcp_bpf_push_locked(sk, msg, bytes, flags, false);
 	sk_psock_put(sk, psock);
@@ -335,7 +334,7 @@ more_data:
 			cork = true;
 			psock->cork = NULL;
 		}
-		sk_msg_return(sk, msg, tosend);
+		sk_msg_return(sk, msg, msg->sg.size);
 		release_sock(sk);
 
 		ret = tcp_bpf_sendmsg_redir(sk_redir, msg, tosend, flags);
@@ -375,8 +374,11 @@ more_data:
 		}
 		if (msg &&
 		    msg->sg.data[msg->sg.start].page_link &&
-		    msg->sg.data[msg->sg.start].length)
+		    msg->sg.data[msg->sg.start].length) {
+			if (eval == __SK_REDIRECT)
+				sk_mem_charge(sk, msg->sg.size);
 			goto more_data;
+		}
 	}
 	return ret;
 }
diff --git a/net/ipv4/tcp_cong.c b/net/ipv4/tcp_cong.c
index db5831e6c136..dc95572163df 100644
--- a/net/ipv4/tcp_cong.c
+++ b/net/ipv4/tcp_cong.c
@@ -135,7 +135,6 @@ u32 tcp_ca_get_key_by_name(struct net *net, const char *name, bool *ecn_ca)
 
 	return key;
 }
-EXPORT_SYMBOL_GPL(tcp_ca_get_key_by_name);
 
 char *tcp_ca_get_name_by_key(u32 key, char *buffer)
 {
@@ -151,7 +150,6 @@ char *tcp_ca_get_name_by_key(u32 key, char *buffer)
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(tcp_ca_get_name_by_key);
 
 /* Assign choice of congestion control. */
 void tcp_assign_congestion_control(struct sock *sk)
diff --git a/net/ipv4/tcp_cubic.c b/net/ipv4/tcp_cubic.c
index e07837e23b3f..24d562dd6225 100644
--- a/net/ipv4/tcp_cubic.c
+++ b/net/ipv4/tcp_cubic.c
@@ -485,7 +485,7 @@ static struct tcp_congestion_ops cubictcp __read_mostly = {
 	.name		= "cubic",
 };
 
-BTF_SET_START(tcp_cubic_kfunc_ids)
+BTF_SET_START(tcp_cubic_check_kfunc_ids)
 #ifdef CONFIG_X86
 #ifdef CONFIG_DYNAMIC_FTRACE
 BTF_ID(func, cubictcp_init)
@@ -496,9 +496,12 @@ BTF_ID(func, cubictcp_cwnd_event)
 BTF_ID(func, cubictcp_acked)
 #endif
 #endif
-BTF_SET_END(tcp_cubic_kfunc_ids)
+BTF_SET_END(tcp_cubic_check_kfunc_ids)
 
-static DEFINE_KFUNC_BTF_ID_SET(&tcp_cubic_kfunc_ids, tcp_cubic_kfunc_btf_set);
+static const struct btf_kfunc_id_set tcp_cubic_kfunc_set = {
+	.owner     = THIS_MODULE,
+	.check_set = &tcp_cubic_check_kfunc_ids,
+};
 
 static int __init cubictcp_register(void)
 {
@@ -534,16 +537,14 @@ static int __init cubictcp_register(void)
 	/* divide by bic_scale and by constant Srtt (100ms) */
 	do_div(cube_factor, bic_scale * 10);
 
-	ret = tcp_register_congestion_control(&cubictcp);
-	if (ret)
+	ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_STRUCT_OPS, &tcp_cubic_kfunc_set);
+	if (ret < 0)
 		return ret;
-	register_kfunc_btf_id_set(&bpf_tcp_ca_kfunc_list, &tcp_cubic_kfunc_btf_set);
-	return 0;
+	return tcp_register_congestion_control(&cubictcp);
 }
 
 static void __exit cubictcp_unregister(void)
 {
-	unregister_kfunc_btf_id_set(&bpf_tcp_ca_kfunc_list, &tcp_cubic_kfunc_btf_set);
 	tcp_unregister_congestion_control(&cubictcp);
 }
 
diff --git a/net/ipv4/tcp_dctcp.c b/net/ipv4/tcp_dctcp.c
index 0d7ab3cc7b61..1943a6630341 100644
--- a/net/ipv4/tcp_dctcp.c
+++ b/net/ipv4/tcp_dctcp.c
@@ -238,7 +238,7 @@ static struct tcp_congestion_ops dctcp_reno __read_mostly = {
 	.name		= "dctcp-reno",
 };
 
-BTF_SET_START(tcp_dctcp_kfunc_ids)
+BTF_SET_START(tcp_dctcp_check_kfunc_ids)
 #ifdef CONFIG_X86
 #ifdef CONFIG_DYNAMIC_FTRACE
 BTF_ID(func, dctcp_init)
@@ -249,25 +249,27 @@ BTF_ID(func, dctcp_cwnd_undo)
 BTF_ID(func, dctcp_state)
 #endif
 #endif
-BTF_SET_END(tcp_dctcp_kfunc_ids)
+BTF_SET_END(tcp_dctcp_check_kfunc_ids)
 
-static DEFINE_KFUNC_BTF_ID_SET(&tcp_dctcp_kfunc_ids, tcp_dctcp_kfunc_btf_set);
+static const struct btf_kfunc_id_set tcp_dctcp_kfunc_set = {
+	.owner     = THIS_MODULE,
+	.check_set = &tcp_dctcp_check_kfunc_ids,
+};
 
 static int __init dctcp_register(void)
 {
 	int ret;
 
 	BUILD_BUG_ON(sizeof(struct dctcp) > ICSK_CA_PRIV_SIZE);
-	ret = tcp_register_congestion_control(&dctcp);
-	if (ret)
+
+	ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_STRUCT_OPS, &tcp_dctcp_kfunc_set);
+	if (ret < 0)
 		return ret;
-	register_kfunc_btf_id_set(&bpf_tcp_ca_kfunc_list, &tcp_dctcp_kfunc_btf_set);
-	return 0;
+	return tcp_register_congestion_control(&dctcp);
 }
 
 static void __exit dctcp_unregister(void)
 {
-	unregister_kfunc_btf_id_set(&bpf_tcp_ca_kfunc_list, &tcp_dctcp_kfunc_btf_set);
 	tcp_unregister_congestion_control(&dctcp);
 }
 
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index bfe4112e000c..2088f93fa37b 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -4684,10 +4684,16 @@ static bool tcp_ooo_try_coalesce(struct sock *sk,
 	return res;
 }
 
-static void tcp_drop(struct sock *sk, struct sk_buff *skb)
+static void tcp_drop_reason(struct sock *sk, struct sk_buff *skb,
+			    enum skb_drop_reason reason)
 {
 	sk_drops_add(sk, skb);
-	__kfree_skb(skb);
+	kfree_skb_reason(skb, reason);
+}
+
+static void tcp_drop(struct sock *sk, struct sk_buff *skb)
+{
+	tcp_drop_reason(sk, skb, SKB_DROP_REASON_NOT_SPECIFIED);
 }
 
 /* This one checks to see if we can put data from the
@@ -4773,7 +4779,7 @@ static void tcp_data_queue_ofo(struct sock *sk, struct sk_buff *skb)
 	if (unlikely(tcp_try_rmem_schedule(sk, skb, skb->truesize))) {
 		NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPOFODROP);
 		sk->sk_data_ready(sk);
-		tcp_drop(sk, skb);
+		tcp_drop_reason(sk, skb, SKB_DROP_REASON_PROTO_MEM);
 		return;
 	}
 
@@ -4836,7 +4842,8 @@ coalesce_done:
 				/* All the bits are present. Drop. */
 				NET_INC_STATS(sock_net(sk),
 					      LINUX_MIB_TCPOFOMERGE);
-				tcp_drop(sk, skb);
+				tcp_drop_reason(sk, skb,
+						SKB_DROP_REASON_TCP_OFOMERGE);
 				skb = NULL;
 				tcp_dsack_set(sk, seq, end_seq);
 				goto add_sack;
@@ -4855,7 +4862,8 @@ coalesce_done:
 						 TCP_SKB_CB(skb1)->end_seq);
 				NET_INC_STATS(sock_net(sk),
 					      LINUX_MIB_TCPOFOMERGE);
-				tcp_drop(sk, skb1);
+				tcp_drop_reason(sk, skb1,
+						SKB_DROP_REASON_TCP_OFOMERGE);
 				goto merge_right;
 			}
 		} else if (tcp_ooo_try_coalesce(sk, skb1,
@@ -4883,7 +4891,7 @@ merge_right:
 		tcp_dsack_extend(sk, TCP_SKB_CB(skb1)->seq,
 				 TCP_SKB_CB(skb1)->end_seq);
 		NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPOFOMERGE);
-		tcp_drop(sk, skb1);
+		tcp_drop_reason(sk, skb1, SKB_DROP_REASON_TCP_OFOMERGE);
 	}
 	/* If there is no skb after us, we are the last_skb ! */
 	if (!skb1)
@@ -4982,6 +4990,7 @@ void tcp_data_ready(struct sock *sk)
 static void tcp_data_queue(struct sock *sk, struct sk_buff *skb)
 {
 	struct tcp_sock *tp = tcp_sk(sk);
+	enum skb_drop_reason reason;
 	bool fragstolen;
 	int eaten;
 
@@ -5000,6 +5009,7 @@ static void tcp_data_queue(struct sock *sk, struct sk_buff *skb)
 	skb_dst_drop(skb);
 	__skb_pull(skb, tcp_hdr(skb)->doff * 4);
 
+	reason = SKB_DROP_REASON_NOT_SPECIFIED;
 	tp->rx_opt.dsack = 0;
 
 	/*  Queue data for delivery to the user.
@@ -5008,6 +5018,7 @@ static void tcp_data_queue(struct sock *sk, struct sk_buff *skb)
 	 */
 	if (TCP_SKB_CB(skb)->seq == tp->rcv_nxt) {
 		if (tcp_receive_window(tp) == 0) {
+			reason = SKB_DROP_REASON_TCP_ZEROWINDOW;
 			NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPZEROWINDOWDROP);
 			goto out_of_window;
 		}
@@ -5017,6 +5028,7 @@ queue_and_out:
 		if (skb_queue_len(&sk->sk_receive_queue) == 0)
 			sk_forced_mem_schedule(sk, skb->truesize);
 		else if (tcp_try_rmem_schedule(sk, skb, skb->truesize)) {
+			reason = SKB_DROP_REASON_PROTO_MEM;
 			NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPRCVQDROP);
 			sk->sk_data_ready(sk);
 			goto drop;
@@ -5053,6 +5065,7 @@ queue_and_out:
 	if (!after(TCP_SKB_CB(skb)->end_seq, tp->rcv_nxt)) {
 		tcp_rcv_spurious_retrans(sk, skb);
 		/* A retransmit, 2nd most common case.  Force an immediate ack. */
+		reason = SKB_DROP_REASON_TCP_OLD_DATA;
 		NET_INC_STATS(sock_net(sk), LINUX_MIB_DELAYEDACKLOST);
 		tcp_dsack_set(sk, TCP_SKB_CB(skb)->seq, TCP_SKB_CB(skb)->end_seq);
 
@@ -5060,13 +5073,16 @@ out_of_window:
 		tcp_enter_quickack_mode(sk, TCP_MAX_QUICKACKS);
 		inet_csk_schedule_ack(sk);
 drop:
-		tcp_drop(sk, skb);
+		tcp_drop_reason(sk, skb, reason);
 		return;
 	}
 
 	/* Out of window. F.e. zero window probe. */
-	if (!before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt + tcp_receive_window(tp)))
+	if (!before(TCP_SKB_CB(skb)->seq,
+		    tp->rcv_nxt + tcp_receive_window(tp))) {
+		reason = SKB_DROP_REASON_TCP_OVERWINDOW;
 		goto out_of_window;
+	}
 
 	if (before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) {
 		/* Partial packet, seq < rcv_next < end_seq */
@@ -5076,6 +5092,7 @@ drop:
 		 * remembering D-SACK for its head made in previous line.
 		 */
 		if (!tcp_receive_window(tp)) {
+			reason = SKB_DROP_REASON_TCP_ZEROWINDOW;
 			NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPZEROWINDOWDROP);
 			goto out_of_window;
 		}
@@ -5781,6 +5798,7 @@ discard:
  */
 void tcp_rcv_established(struct sock *sk, struct sk_buff *skb)
 {
+	enum skb_drop_reason reason = SKB_DROP_REASON_NOT_SPECIFIED;
 	const struct tcphdr *th = (const struct tcphdr *)skb->data;
 	struct tcp_sock *tp = tcp_sk(sk);
 	unsigned int len = skb->len;
@@ -5869,6 +5887,7 @@ void tcp_rcv_established(struct sock *sk, struct sk_buff *skb)
 				tp->rcv_rtt_last_tsecr = tp->rx_opt.rcv_tsecr;
 				return;
 			} else { /* Header too small */
+				reason = SKB_DROP_REASON_PKT_TOO_SMALL;
 				TCP_INC_STATS(sock_net(sk), TCP_MIB_INERRS);
 				goto discard;
 			}
@@ -5924,8 +5943,10 @@ slow_path:
 	if (len < (th->doff << 2) || tcp_checksum_complete(skb))
 		goto csum_error;
 
-	if (!th->ack && !th->rst && !th->syn)
+	if (!th->ack && !th->rst && !th->syn) {
+		reason = SKB_DROP_REASON_TCP_FLAGS;
 		goto discard;
+	}
 
 	/*
 	 *	Standard slow path.
@@ -5951,12 +5972,13 @@ step5:
 	return;
 
 csum_error:
+	reason = SKB_DROP_REASON_TCP_CSUM;
 	trace_tcp_bad_csum(skb);
 	TCP_INC_STATS(sock_net(sk), TCP_MIB_CSUMERRORS);
 	TCP_INC_STATS(sock_net(sk), TCP_MIB_INERRS);
 
 discard:
-	tcp_drop(sk, skb);
+	tcp_drop_reason(sk, skb, reason);
 }
 EXPORT_SYMBOL(tcp_rcv_established);
 
@@ -6703,7 +6725,8 @@ static void tcp_openreq_init(struct request_sock *req,
 	ireq->ir_num = ntohs(tcp_hdr(skb)->dest);
 	ireq->ir_mark = inet_request_mark(sk, skb);
 #if IS_ENABLED(CONFIG_SMC)
-	ireq->smc_ok = rx_opt->smc_ok;
+	ireq->smc_ok = rx_opt->smc_ok && !(tcp_sk(sk)->smc_hs_congested &&
+			tcp_sk(sk)->smc_hs_congested(sk));
 #endif
 }
 
@@ -6725,6 +6748,7 @@ struct request_sock *inet_reqsk_alloc(const struct request_sock_ops *ops,
 		ireq->ireq_state = TCP_NEW_SYN_RECV;
 		write_pnet(&ireq->ireq_net, sock_net(sk_listener));
 		ireq->ireq_family = sk_listener->sk_family;
+		req->timeout = TCP_TIMEOUT_INIT;
 	}
 
 	return req;
@@ -6941,9 +6965,10 @@ int tcp_conn_request(struct request_sock_ops *rsk_ops,
 		sock_put(fastopen_sk);
 	} else {
 		tcp_rsk(req)->tfo_listener = false;
-		if (!want_cookie)
-			inet_csk_reqsk_queue_hash_add(sk, req,
-				tcp_timeout_init((struct sock *)req));
+		if (!want_cookie) {
+			req->timeout = tcp_timeout_init((struct sock *)req);
+			inet_csk_reqsk_queue_hash_add(sk, req, req->timeout);
+		}
 		af_ops->send_synack(sk, dst, &fl, req, &foc,
 				    !want_cookie ? TCP_SYNACK_NORMAL :
 						   TCP_SYNACK_COOKIE,
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index fec656f5a39e..f9cec624068d 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -91,6 +91,8 @@ static int tcp_v4_md5_hash_hdr(char *md5_hash, const struct tcp_md5sig_key *key,
 struct inet_hashinfo tcp_hashinfo;
 EXPORT_SYMBOL(tcp_hashinfo);
 
+static DEFINE_PER_CPU(struct sock *, ipv4_tcp_sk);
+
 static u32 tcp_v4_init_seq(const struct sk_buff *skb)
 {
 	return secure_tcp_seq(ip_hdr(skb)->daddr,
@@ -206,7 +208,7 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 	struct rtable *rt;
 	int err;
 	struct ip_options_rcu *inet_opt;
-	struct inet_timewait_death_row *tcp_death_row = &sock_net(sk)->ipv4.tcp_death_row;
+	struct inet_timewait_death_row *tcp_death_row = sock_net(sk)->ipv4.tcp_death_row;
 
 	if (addr_len < sizeof(struct sockaddr_in))
 		return -EINVAL;
@@ -810,7 +812,8 @@ static void tcp_v4_send_reset(const struct sock *sk, struct sk_buff *skb)
 	arg.tos = ip_hdr(skb)->tos;
 	arg.uid = sock_net_uid(net, sk && sk_fullsock(sk) ? sk : NULL);
 	local_bh_disable();
-	ctl_sk = this_cpu_read(*net->ipv4.tcp_sk);
+	ctl_sk = this_cpu_read(ipv4_tcp_sk);
+	sock_net_set(ctl_sk, net);
 	if (sk) {
 		ctl_sk->sk_mark = (sk->sk_state == TCP_TIME_WAIT) ?
 				   inet_twsk(sk)->tw_mark : sk->sk_mark;
@@ -825,6 +828,7 @@ static void tcp_v4_send_reset(const struct sock *sk, struct sk_buff *skb)
 			      transmit_time);
 
 	ctl_sk->sk_mark = 0;
+	sock_net_set(ctl_sk, &init_net);
 	__TCP_INC_STATS(net, TCP_MIB_OUTSEGS);
 	__TCP_INC_STATS(net, TCP_MIB_OUTRSTS);
 	local_bh_enable();
@@ -908,7 +912,8 @@ static void tcp_v4_send_ack(const struct sock *sk,
 	arg.tos = tos;
 	arg.uid = sock_net_uid(net, sk_fullsock(sk) ? sk : NULL);
 	local_bh_disable();
-	ctl_sk = this_cpu_read(*net->ipv4.tcp_sk);
+	ctl_sk = this_cpu_read(ipv4_tcp_sk);
+	sock_net_set(ctl_sk, net);
 	ctl_sk->sk_mark = (sk->sk_state == TCP_TIME_WAIT) ?
 			   inet_twsk(sk)->tw_mark : sk->sk_mark;
 	ctl_sk->sk_priority = (sk->sk_state == TCP_TIME_WAIT) ?
@@ -921,6 +926,7 @@ static void tcp_v4_send_ack(const struct sock *sk,
 			      transmit_time);
 
 	ctl_sk->sk_mark = 0;
+	sock_net_set(ctl_sk, &init_net);
 	__TCP_INC_STATS(net, TCP_MIB_OUTSEGS);
 	local_bh_enable();
 }
@@ -1403,72 +1409,6 @@ EXPORT_SYMBOL(tcp_v4_md5_hash_skb);
 
 #endif
 
-/* Called with rcu_read_lock() */
-static bool tcp_v4_inbound_md5_hash(const struct sock *sk,
-				    const struct sk_buff *skb,
-				    int dif, int sdif)
-{
-#ifdef CONFIG_TCP_MD5SIG
-	/*
-	 * This gets called for each TCP segment that arrives
-	 * so we want to be efficient.
-	 * We have 3 drop cases:
-	 * o No MD5 hash and one expected.
-	 * o MD5 hash and we're not expecting one.
-	 * o MD5 hash and its wrong.
-	 */
-	const __u8 *hash_location = NULL;
-	struct tcp_md5sig_key *hash_expected;
-	const struct iphdr *iph = ip_hdr(skb);
-	const struct tcphdr *th = tcp_hdr(skb);
-	const union tcp_md5_addr *addr;
-	unsigned char newhash[16];
-	int genhash, l3index;
-
-	/* sdif set, means packet ingressed via a device
-	 * in an L3 domain and dif is set to the l3mdev
-	 */
-	l3index = sdif ? dif : 0;
-
-	addr = (union tcp_md5_addr *)&iph->saddr;
-	hash_expected = tcp_md5_do_lookup(sk, l3index, addr, AF_INET);
-	hash_location = tcp_parse_md5sig_option(th);
-
-	/* We've parsed the options - do we have a hash? */
-	if (!hash_expected && !hash_location)
-		return false;
-
-	if (hash_expected && !hash_location) {
-		NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMD5NOTFOUND);
-		return true;
-	}
-
-	if (!hash_expected && hash_location) {
-		NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMD5UNEXPECTED);
-		return true;
-	}
-
-	/* Okay, so this is hash_expected and hash_location -
-	 * so we need to calculate the checksum.
-	 */
-	genhash = tcp_v4_md5_hash_skb(newhash,
-				      hash_expected,
-				      NULL, skb);
-
-	if (genhash || memcmp(hash_location, newhash, 16) != 0) {
-		NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMD5FAILURE);
-		net_info_ratelimited("MD5 Hash failed for (%pI4, %d)->(%pI4, %d)%s L3 index %d\n",
-				     &iph->saddr, ntohs(th->source),
-				     &iph->daddr, ntohs(th->dest),
-				     genhash ? " tcp_v4_calc_md5_hash failed"
-				     : "", l3index);
-		return true;
-	}
-	return false;
-#endif
-	return false;
-}
-
 static void tcp_v4_init_req(struct request_sock *req,
 			    const struct sock *sk_listener,
 			    struct sk_buff *skb)
@@ -1698,6 +1638,7 @@ INDIRECT_CALLABLE_DECLARE(struct dst_entry *ipv4_dst_check(struct dst_entry *,
  */
 int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb)
 {
+	enum skb_drop_reason reason;
 	struct sock *rsk;
 
 	if (sk->sk_state == TCP_ESTABLISHED) { /* Fast path */
@@ -1720,6 +1661,7 @@ int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb)
 		return 0;
 	}
 
+	reason = SKB_DROP_REASON_NOT_SPECIFIED;
 	if (tcp_checksum_complete(skb))
 		goto csum_err;
 
@@ -1747,7 +1689,7 @@ int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb)
 reset:
 	tcp_v4_send_reset(rsk, skb);
 discard:
-	kfree_skb(skb);
+	kfree_skb_reason(skb, reason);
 	/* Be careful here. If this function gets more complicated and
 	 * gcc suffers from register pressure on the x86, sk (in %ebx)
 	 * might be destroyed here. This current version compiles correctly,
@@ -1756,6 +1698,7 @@ discard:
 	return 0;
 
 csum_err:
+	reason = SKB_DROP_REASON_TCP_CSUM;
 	trace_tcp_bad_csum(skb);
 	TCP_INC_STATS(sock_net(sk), TCP_MIB_CSUMERRORS);
 	TCP_INC_STATS(sock_net(sk), TCP_MIB_INERRS);
@@ -1801,7 +1744,8 @@ int tcp_v4_early_demux(struct sk_buff *skb)
 	return 0;
 }
 
-bool tcp_add_backlog(struct sock *sk, struct sk_buff *skb)
+bool tcp_add_backlog(struct sock *sk, struct sk_buff *skb,
+		     enum skb_drop_reason *reason)
 {
 	u32 limit, tail_gso_size, tail_gso_segs;
 	struct skb_shared_info *shinfo;
@@ -1827,6 +1771,7 @@ bool tcp_add_backlog(struct sock *sk, struct sk_buff *skb)
 	if (unlikely(tcp_checksum_complete(skb))) {
 		bh_unlock_sock(sk);
 		trace_tcp_bad_csum(skb);
+		*reason = SKB_DROP_REASON_TCP_CSUM;
 		__TCP_INC_STATS(sock_net(sk), TCP_MIB_CSUMERRORS);
 		__TCP_INC_STATS(sock_net(sk), TCP_MIB_INERRS);
 		return true;
@@ -1915,6 +1860,7 @@ no_coalesce:
 
 	if (unlikely(sk_add_backlog(sk, skb, limit))) {
 		bh_unlock_sock(sk);
+		*reason = SKB_DROP_REASON_SOCKET_BACKLOG;
 		__NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPBACKLOGDROP);
 		return true;
 	}
@@ -1965,13 +1911,13 @@ static void tcp_v4_fill_cb(struct sk_buff *skb, const struct iphdr *iph,
 int tcp_v4_rcv(struct sk_buff *skb)
 {
 	struct net *net = dev_net(skb->dev);
+	enum skb_drop_reason drop_reason;
 	int sdif = inet_sdif(skb);
 	int dif = inet_iif(skb);
 	const struct iphdr *iph;
 	const struct tcphdr *th;
 	bool refcounted;
 	struct sock *sk;
-	int drop_reason;
 	int ret;
 
 	drop_reason = SKB_DROP_REASON_NOT_SPECIFIED;
@@ -2019,7 +1965,10 @@ process:
 		struct sock *nsk;
 
 		sk = req->rsk_listener;
-		if (unlikely(tcp_v4_inbound_md5_hash(sk, skb, dif, sdif))) {
+		drop_reason = tcp_inbound_md5_hash(sk, skb,
+						   &iph->saddr, &iph->daddr,
+						   AF_INET, dif, sdif);
+		if (unlikely(drop_reason)) {
 			sk_drops_add(sk, skb);
 			reqsk_put(req);
 			goto discard_it;
@@ -2051,6 +2000,8 @@ process:
 			iph = ip_hdr(skb);
 			tcp_v4_fill_cb(skb, iph, th);
 			nsk = tcp_check_req(sk, skb, req, false, &req_stolen);
+		} else {
+			drop_reason = SKB_DROP_REASON_SOCKET_FILTER;
 		}
 		if (!nsk) {
 			reqsk_put(req);
@@ -2086,10 +2037,14 @@ process:
 		}
 	}
 
-	if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb))
+	if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) {
+		drop_reason = SKB_DROP_REASON_XFRM_POLICY;
 		goto discard_and_relse;
+	}
 
-	if (tcp_v4_inbound_md5_hash(sk, skb, dif, sdif))
+	drop_reason = tcp_inbound_md5_hash(sk, skb, &iph->saddr,
+					   &iph->daddr, AF_INET, dif, sdif);
+	if (drop_reason)
 		goto discard_and_relse;
 
 	nf_reset_ct(skb);
@@ -2118,7 +2073,7 @@ process:
 	if (!sock_owned_by_user(sk)) {
 		ret = tcp_v4_do_rcv(sk, skb);
 	} else {
-		if (tcp_add_backlog(sk, skb))
+		if (tcp_add_backlog(sk, skb, &drop_reason))
 			goto discard_and_relse;
 	}
 	bh_unlock_sock(sk);
@@ -2160,6 +2115,7 @@ discard_and_relse:
 
 do_time_wait:
 	if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) {
+		drop_reason = SKB_DROP_REASON_XFRM_POLICY;
 		inet_twsk_put(inet_twsk(sk));
 		goto discard_it;
 	}
@@ -3111,41 +3067,18 @@ EXPORT_SYMBOL(tcp_prot);
 
 static void __net_exit tcp_sk_exit(struct net *net)
 {
-	int cpu;
+	struct inet_timewait_death_row *tcp_death_row = net->ipv4.tcp_death_row;
 
 	if (net->ipv4.tcp_congestion_control)
 		bpf_module_put(net->ipv4.tcp_congestion_control,
 			       net->ipv4.tcp_congestion_control->owner);
-
-	for_each_possible_cpu(cpu)
-		inet_ctl_sock_destroy(*per_cpu_ptr(net->ipv4.tcp_sk, cpu));
-	free_percpu(net->ipv4.tcp_sk);
+	if (refcount_dec_and_test(&tcp_death_row->tw_refcount))
+		kfree(tcp_death_row);
 }
 
 static int __net_init tcp_sk_init(struct net *net)
 {
-	int res, cpu, cnt;
-
-	net->ipv4.tcp_sk = alloc_percpu(struct sock *);
-	if (!net->ipv4.tcp_sk)
-		return -ENOMEM;
-
-	for_each_possible_cpu(cpu) {
-		struct sock *sk;
-
-		res = inet_ctl_sock_create(&sk, PF_INET, SOCK_RAW,
-					   IPPROTO_TCP, net);
-		if (res)
-			goto fail;
-		sock_set_flag(sk, SOCK_USE_WRITE_QUEUE);
-
-		/* Please enforce IP_DF and IPID==0 for RST and
-		 * ACK sent in SYN-RECV and TIME-WAIT state.
-		 */
-		inet_sk(sk)->pmtudisc = IP_PMTUDISC_DO;
-
-		*per_cpu_ptr(net->ipv4.tcp_sk, cpu) = sk;
-	}
+	int cnt;
 
 	net->ipv4.sysctl_tcp_ecn = 2;
 	net->ipv4.sysctl_tcp_ecn_fallback = 1;
@@ -3172,9 +3105,13 @@ static int __net_init tcp_sk_init(struct net *net)
 	net->ipv4.sysctl_tcp_tw_reuse = 2;
 	net->ipv4.sysctl_tcp_no_ssthresh_metrics_save = 1;
 
+	net->ipv4.tcp_death_row = kzalloc(sizeof(struct inet_timewait_death_row), GFP_KERNEL);
+	if (!net->ipv4.tcp_death_row)
+		return -ENOMEM;
+	refcount_set(&net->ipv4.tcp_death_row->tw_refcount, 1);
 	cnt = tcp_hashinfo.ehash_mask + 1;
-	net->ipv4.tcp_death_row.sysctl_max_tw_buckets = cnt / 2;
-	net->ipv4.tcp_death_row.hashinfo = &tcp_hashinfo;
+	net->ipv4.tcp_death_row->sysctl_max_tw_buckets = cnt / 2;
+	net->ipv4.tcp_death_row->hashinfo = &tcp_hashinfo;
 
 	net->ipv4.sysctl_max_syn_backlog = max(128, cnt / 128);
 	net->ipv4.sysctl_tcp_sack = 1;
@@ -3200,6 +3137,7 @@ static int __net_init tcp_sk_init(struct net *net)
 	/* rfc5961 challenge ack rate limiting */
 	net->ipv4.sysctl_tcp_challenge_ack_limit = 1000;
 	net->ipv4.sysctl_tcp_min_tso_segs = 2;
+	net->ipv4.sysctl_tcp_tso_rtt_log = 9;  /* 2^9 = 512 usec */
 	net->ipv4.sysctl_tcp_min_rtt_wlen = 300;
 	net->ipv4.sysctl_tcp_autocorking = 1;
 	net->ipv4.sysctl_tcp_invalid_ratelimit = HZ/2;
@@ -3229,18 +3167,12 @@ static int __net_init tcp_sk_init(struct net *net)
 		net->ipv4.tcp_congestion_control = &tcp_reno;
 
 	return 0;
-fail:
-	tcp_sk_exit(net);
-
-	return res;
 }
 
 static void __net_exit tcp_sk_exit_batch(struct list_head *net_exit_list)
 {
 	struct net *net;
 
-	inet_twsk_purge(&tcp_hashinfo, AF_INET);
-
 	list_for_each_entry(net, net_exit_list, exit_list)
 		tcp_fastopen_ctx_destroy(net);
 }
@@ -3326,6 +3258,24 @@ static void __init bpf_iter_register(void)
 
 void __init tcp_v4_init(void)
 {
+	int cpu, res;
+
+	for_each_possible_cpu(cpu) {
+		struct sock *sk;
+
+		res = inet_ctl_sock_create(&sk, PF_INET, SOCK_RAW,
+					   IPPROTO_TCP, &init_net);
+		if (res)
+			panic("Failed to create the TCP control socket.\n");
+		sock_set_flag(sk, SOCK_USE_WRITE_QUEUE);
+
+		/* Please enforce IP_DF and IPID==0 for RST and
+		 * ACK sent in SYN-RECV and TIME-WAIT state.
+		 */
+		inet_sk(sk)->pmtudisc = IP_PMTUDISC_DO;
+
+		per_cpu(ipv4_tcp_sk, cpu) = sk;
+	}
 	if (register_pernet_subsys(&tcp_sk_ops))
 		panic("Failed to create the TCP control socket.\n");
 
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c
index 7c2d3ac2363a..6366df7aaf2a 100644
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c
@@ -248,7 +248,7 @@ void tcp_time_wait(struct sock *sk, int state, int timeo)
 	const struct inet_connection_sock *icsk = inet_csk(sk);
 	const struct tcp_sock *tp = tcp_sk(sk);
 	struct inet_timewait_sock *tw;
-	struct inet_timewait_death_row *tcp_death_row = &sock_net(sk)->ipv4.tcp_death_row;
+	struct inet_timewait_death_row *tcp_death_row = sock_net(sk)->ipv4.tcp_death_row;
 
 	tw = inet_twsk_alloc(sk, tcp_death_row, state);
 
@@ -583,7 +583,7 @@ struct sock *tcp_check_req(struct sock *sk, struct sk_buff *skb,
 			 * it can be estimated (approximately)
 			 * from another data.
 			 */
-			tmp_opt.ts_recent_stamp = ktime_get_seconds() - ((TCP_TIMEOUT_INIT/HZ)<<req->num_timeout);
+			tmp_opt.ts_recent_stamp = ktime_get_seconds() - reqsk_timeout(req, TCP_RTO_MAX) / HZ;
 			paws_reject = tcp_paws_reject(&tmp_opt, th->rst);
 		}
 	}
@@ -622,8 +622,7 @@ struct sock *tcp_check_req(struct sock *sk, struct sk_buff *skb,
 		    !inet_rtx_syn_ack(sk, req)) {
 			unsigned long expires = jiffies;
 
-			expires += min(TCP_TIMEOUT_INIT << req->num_timeout,
-				       TCP_RTO_MAX);
+			expires += reqsk_timeout(req, TCP_RTO_MAX);
 			if (!fastopen)
 				mod_timer_pending(&req->rsk_timer, expires);
 			else
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 5079832af5c1..9ede847f4199 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -1253,7 +1253,7 @@ static int __tcp_transmit_skb(struct sock *sk, struct sk_buff *skb,
 	tp = tcp_sk(sk);
 	prior_wstamp = tp->tcp_wstamp_ns;
 	tp->tcp_wstamp_ns = max(tp->tcp_wstamp_ns, tp->tcp_clock_cache);
-	skb->skb_mstamp_ns = tp->tcp_wstamp_ns;
+	skb_set_delivery_time(skb, tp->tcp_wstamp_ns, true);
 	if (clone_it) {
 		oskb = skb;
 
@@ -1589,7 +1589,7 @@ int tcp_fragment(struct sock *sk, enum tcp_queue tcp_queue,
 
 	skb_split(skb, buff, len);
 
-	buff->tstamp = skb->tstamp;
+	skb_set_delivery_time(buff, skb->tstamp, true);
 	tcp_fragment_tstamp(skb, buff);
 
 	old_factor = tcp_skb_pcount(skb);
@@ -1951,25 +1951,34 @@ static bool tcp_nagle_check(bool partial, const struct tcp_sock *tp,
 }
 
 /* Return how many segs we'd like on a TSO packet,
- * to send one TSO packet per ms
+ * depending on current pacing rate, and how close the peer is.
+ *
+ * Rationale is:
+ * - For close peers, we rather send bigger packets to reduce
+ *   cpu costs, because occasional losses will be repaired fast.
+ * - For long distance/rtt flows, we would like to get ACK clocking
+ *   with 1 ACK per ms.
+ *
+ * Use min_rtt to help adapt TSO burst size, with smaller min_rtt resulting
+ * in bigger TSO bursts. We we cut the RTT-based allowance in half
+ * for every 2^9 usec (aka 512 us) of RTT, so that the RTT-based allowance
+ * is below 1500 bytes after 6 * ~500 usec = 3ms.
  */
 static u32 tcp_tso_autosize(const struct sock *sk, unsigned int mss_now,
 			    int min_tso_segs)
 {
-	u32 bytes, segs;
+	unsigned long bytes;
+	u32 r;
 
-	bytes = min_t(unsigned long,
-		      sk->sk_pacing_rate >> READ_ONCE(sk->sk_pacing_shift),
-		      sk->sk_gso_max_size - 1 - MAX_TCP_HEADER);
+	bytes = sk->sk_pacing_rate >> READ_ONCE(sk->sk_pacing_shift);
 
-	/* Goal is to send at least one packet per ms,
-	 * not one big TSO packet every 100 ms.
-	 * This preserves ACK clocking and is consistent
-	 * with tcp_tso_should_defer() heuristic.
-	 */
-	segs = max_t(u32, bytes / mss_now, min_tso_segs);
+	r = tcp_min_rtt(tcp_sk(sk)) >> sock_net(sk)->ipv4.sysctl_tcp_tso_rtt_log;
+	if (r < BITS_PER_TYPE(sk->sk_gso_max_size))
+		bytes += sk->sk_gso_max_size >> r;
 
-	return segs;
+	bytes = min_t(unsigned long, bytes, sk->sk_gso_max_size);
+
+	return max_t(u32, bytes / mss_now, min_tso_segs);
 }
 
 /* Return the number of segments we want in the skb we are transmitting.
@@ -2616,7 +2625,8 @@ static bool tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle,
 
 		if (unlikely(tp->repair) && tp->repair_queue == TCP_SEND_QUEUE) {
 			/* "skb_mstamp_ns" is used as a start point for the retransmit timer */
-			skb->skb_mstamp_ns = tp->tcp_wstamp_ns = tp->tcp_clock_cache;
+			tp->tcp_wstamp_ns = tp->tcp_clock_cache;
+			skb_set_delivery_time(skb, tp->tcp_wstamp_ns, true);
 			list_move_tail(&skb->tcp_tsorted_anchor, &tp->tsorted_sent_queue);
 			tcp_init_tso_segs(skb, mss_now);
 			goto repair; /* Skip network transmission */
@@ -3541,11 +3551,12 @@ struct sk_buff *tcp_make_synack(const struct sock *sk, struct dst_entry *dst,
 	now = tcp_clock_ns();
 #ifdef CONFIG_SYN_COOKIES
 	if (unlikely(synack_type == TCP_SYNACK_COOKIE && ireq->tstamp_ok))
-		skb->skb_mstamp_ns = cookie_init_timestamp(req, now);
+		skb_set_delivery_time(skb, cookie_init_timestamp(req, now),
+				      true);
 	else
 #endif
 	{
-		skb->skb_mstamp_ns = now;
+		skb_set_delivery_time(skb, now, true);
 		if (!tcp_rsk(req)->snt_synack) /* Timestamp first SYNACK */
 			tcp_rsk(req)->snt_synack = tcp_skb_timestamp_us(skb);
 	}
@@ -3594,7 +3605,7 @@ struct sk_buff *tcp_make_synack(const struct sock *sk, struct dst_entry *dst,
 	bpf_skops_write_hdr_opt((struct sock *)sk, skb, req, syn_skb,
 				synack_type, &opts);
 
-	skb->skb_mstamp_ns = now;
+	skb_set_delivery_time(skb, now, true);
 	tcp_add_tx_delay(skb, tp);
 
 	return skb;
@@ -3719,6 +3730,7 @@ static void tcp_connect_queue_skb(struct sock *sk, struct sk_buff *skb)
  */
 static int tcp_send_syn_data(struct sock *sk, struct sk_buff *syn)
 {
+	struct inet_connection_sock *icsk = inet_csk(sk);
 	struct tcp_sock *tp = tcp_sk(sk);
 	struct tcp_fastopen_request *fo = tp->fastopen_req;
 	int space, err = 0;
@@ -3733,8 +3745,10 @@ static int tcp_send_syn_data(struct sock *sk, struct sk_buff *syn)
 	 * private TCP options. The cost is reduced data space in SYN :(
 	 */
 	tp->rx_opt.mss_clamp = tcp_mss_clamp(tp, tp->rx_opt.mss_clamp);
+	/* Sync mss_cache after updating the mss_clamp */
+	tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
 
-	space = __tcp_mtu_to_mss(sk, inet_csk(sk)->icsk_pmtu_cookie) -
+	space = __tcp_mtu_to_mss(sk, icsk->icsk_pmtu_cookie) -
 		MAX_TCP_OPTION_SPACE;
 
 	space = min_t(size_t, space, fo->size);
@@ -3771,7 +3785,7 @@ static int tcp_send_syn_data(struct sock *sk, struct sk_buff *syn)
 
 	err = tcp_transmit_skb(sk, syn_data, 1, sk->sk_allocation);
 
-	syn->skb_mstamp_ns = syn_data->skb_mstamp_ns;
+	skb_set_delivery_time(syn, syn_data->skb_mstamp_ns, true);
 
 	/* Now full SYN+DATA was cloned and sent (or not),
 	 * remove the SYN from the original skb (syn_data)
@@ -4092,7 +4106,9 @@ int tcp_rtx_synack(const struct sock *sk, struct request_sock *req)
 	struct flowi fl;
 	int res;
 
-	tcp_rsk(req)->txhash = net_tx_rndhash();
+	/* Paired with WRITE_ONCE() in sock_setsockopt() */
+	if (READ_ONCE(sk->sk_txrehash) == SOCK_TXREHASH_ENABLED)
+		tcp_rsk(req)->txhash = net_tx_rndhash();
 	res = af_ops->send_synack(sk, NULL, &fl, req, NULL, TCP_SYNACK_NORMAL,
 				  NULL);
 	if (!res) {
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 090360939401..6b4d8361560f 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -2093,16 +2093,20 @@ static int __udp_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
 	rc = __udp_enqueue_schedule_skb(sk, skb);
 	if (rc < 0) {
 		int is_udplite = IS_UDPLITE(sk);
+		int drop_reason;
 
 		/* Note that an ENOMEM error is charged twice */
-		if (rc == -ENOMEM)
+		if (rc == -ENOMEM) {
 			UDP_INC_STATS(sock_net(sk), UDP_MIB_RCVBUFERRORS,
 					is_udplite);
-		else
+			drop_reason = SKB_DROP_REASON_SOCKET_RCVBUFF;
+		} else {
 			UDP_INC_STATS(sock_net(sk), UDP_MIB_MEMERRORS,
 				      is_udplite);
+			drop_reason = SKB_DROP_REASON_PROTO_MEM;
+		}
 		UDP_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite);
-		kfree_skb(skb);
+		kfree_skb_reason(skb, drop_reason);
 		trace_udp_fail_queue_rcv_skb(rc, sk);
 		return -1;
 	}
@@ -2120,14 +2124,17 @@ static int __udp_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
  */
 static int udp_queue_rcv_one_skb(struct sock *sk, struct sk_buff *skb)
 {
+	int drop_reason = SKB_DROP_REASON_NOT_SPECIFIED;
 	struct udp_sock *up = udp_sk(sk);
 	int is_udplite = IS_UDPLITE(sk);
 
 	/*
 	 *	Charge it to the socket, dropping if the queue is full.
 	 */
-	if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb))
+	if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) {
+		drop_reason = SKB_DROP_REASON_XFRM_POLICY;
 		goto drop;
+	}
 	nf_reset_ct(skb);
 
 	if (static_branch_unlikely(&udp_encap_needed_key) && up->encap_type) {
@@ -2204,8 +2211,10 @@ static int udp_queue_rcv_one_skb(struct sock *sk, struct sk_buff *skb)
 	    udp_lib_checksum_complete(skb))
 			goto csum_error;
 
-	if (sk_filter_trim_cap(sk, skb, sizeof(struct udphdr)))
+	if (sk_filter_trim_cap(sk, skb, sizeof(struct udphdr))) {
+		drop_reason = SKB_DROP_REASON_SOCKET_FILTER;
 		goto drop;
+	}
 
 	udp_csum_pull_header(skb);
 
@@ -2213,11 +2222,12 @@ static int udp_queue_rcv_one_skb(struct sock *sk, struct sk_buff *skb)
 	return __udp_queue_rcv_skb(sk, skb);
 
 csum_error:
+	drop_reason = SKB_DROP_REASON_UDP_CSUM;
 	__UDP_INC_STATS(sock_net(sk), UDP_MIB_CSUMERRORS, is_udplite);
 drop:
 	__UDP_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite);
 	atomic_inc(&sk->sk_drops);
-	kfree_skb(skb);
+	kfree_skb_reason(skb, drop_reason);
 	return -1;
 }
 
diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c
index 9e83bcb6bc99..6fde0b184791 100644
--- a/net/ipv4/xfrm4_policy.c
+++ b/net/ipv4/xfrm4_policy.c
@@ -28,13 +28,11 @@ static struct dst_entry *__xfrm4_dst_lookup(struct net *net, struct flowi4 *fl4,
 	memset(fl4, 0, sizeof(*fl4));
 	fl4->daddr = daddr->a4;
 	fl4->flowi4_tos = tos;
-	fl4->flowi4_oif = l3mdev_master_ifindex_by_index(net, oif);
+	fl4->flowi4_l3mdev = l3mdev_master_ifindex_by_index(net, oif);
 	fl4->flowi4_mark = mark;
 	if (saddr)
 		fl4->saddr = saddr->a4;
 
-	fl4->flowi4_flags = FLOWI_FLAG_SKIP_NH_OIF;
-
 	rt = __ip_route_output_key(net, fl4);
 	if (!IS_ERR(rt))
 		return &rt->dst;
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index f908e2fd30b2..b22504176588 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -146,18 +146,11 @@ static int ipv6_generate_stable_address(struct in6_addr *addr,
 
 #define IN6_ADDR_HSIZE_SHIFT	8
 #define IN6_ADDR_HSIZE		(1 << IN6_ADDR_HSIZE_SHIFT)
-/*
- *	Configured unicast address hash table
- */
-static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE];
-static DEFINE_SPINLOCK(addrconf_hash_lock);
 
-static void addrconf_verify(void);
-static void addrconf_verify_rtnl(void);
-static void addrconf_verify_work(struct work_struct *);
+static void addrconf_verify(struct net *net);
+static void addrconf_verify_rtnl(struct net *net);
 
 static struct workqueue_struct *addrconf_wq;
-static DECLARE_DELAYED_WORK(addr_chk_work, addrconf_verify_work);
 
 static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
@@ -379,7 +372,7 @@ static struct inet6_dev *ipv6_add_dev(struct net_device *dev)
 
 	ASSERT_RTNL();
 
-	if (dev->mtu < IPV6_MIN_MTU)
+	if (dev->mtu < IPV6_MIN_MTU && dev != blackhole_netdev)
 		return ERR_PTR(-EINVAL);
 
 	ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
@@ -416,12 +409,13 @@ static struct inet6_dev *ipv6_add_dev(struct net_device *dev)
 		return ERR_PTR(err);
 	}
 
-	if (snmp6_register_dev(ndev) < 0) {
-		netdev_dbg(dev, "%s: cannot create /proc/net/dev_snmp6/%s\n",
-			   __func__, dev->name);
-		goto err_release;
+	if (dev != blackhole_netdev) {
+		if (snmp6_register_dev(ndev) < 0) {
+			netdev_dbg(dev, "%s: cannot create /proc/net/dev_snmp6/%s\n",
+				   __func__, dev->name);
+			goto err_release;
+		}
 	}
-
 	/* One reference from device. */
 	refcount_set(&ndev->refcnt, 1);
 
@@ -452,25 +446,28 @@ static struct inet6_dev *ipv6_add_dev(struct net_device *dev)
 
 	ipv6_mc_init_dev(ndev);
 	ndev->tstamp = jiffies;
-	err = addrconf_sysctl_register(ndev);
-	if (err) {
-		ipv6_mc_destroy_dev(ndev);
-		snmp6_unregister_dev(ndev);
-		goto err_release;
+	if (dev != blackhole_netdev) {
+		err = addrconf_sysctl_register(ndev);
+		if (err) {
+			ipv6_mc_destroy_dev(ndev);
+			snmp6_unregister_dev(ndev);
+			goto err_release;
+		}
 	}
 	/* protected by rtnl_lock */
 	rcu_assign_pointer(dev->ip6_ptr, ndev);
 
-	/* Join interface-local all-node multicast group */
-	ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes);
-
-	/* Join all-node multicast group */
-	ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
+	if (dev != blackhole_netdev) {
+		/* Join interface-local all-node multicast group */
+		ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes);
 
-	/* Join all-router multicast group if forwarding is set */
-	if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST))
-		ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
+		/* Join all-node multicast group */
+		ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
 
+		/* Join all-router multicast group if forwarding is set */
+		if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST))
+			ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
+	}
 	return ndev;
 
 err_release:
@@ -554,7 +551,7 @@ static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex,
 #ifdef CONFIG_IPV6_MROUTE
 	if ((all || type == NETCONFA_MC_FORWARDING) &&
 	    nla_put_s32(skb, NETCONFA_MC_FORWARDING,
-			devconf->mc_forwarding) < 0)
+			atomic_read(&devconf->mc_forwarding)) < 0)
 		goto nla_put_failure;
 #endif
 	if ((all || type == NETCONFA_PROXY_NEIGH) &&
@@ -1011,9 +1008,7 @@ static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
 {
 	struct inet6_ifaddr *ifp;
 
-	hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) {
-		if (!net_eq(dev_net(ifp->idev->dev), net))
-			continue;
+	hlist_for_each_entry(ifp, &net->ipv6.inet6_addr_lst[hash], addr_lst) {
 		if (ipv6_addr_equal(&ifp->addr, addr)) {
 			if (!dev || ifp->idev->dev == dev)
 				return true;
@@ -1024,20 +1019,21 @@ static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
 
 static int ipv6_add_addr_hash(struct net_device *dev, struct inet6_ifaddr *ifa)
 {
-	unsigned int hash = inet6_addr_hash(dev_net(dev), &ifa->addr);
+	struct net *net = dev_net(dev);
+	unsigned int hash = inet6_addr_hash(net, &ifa->addr);
 	int err = 0;
 
-	spin_lock(&addrconf_hash_lock);
+	spin_lock(&net->ipv6.addrconf_hash_lock);
 
 	/* Ignore adding duplicate addresses on an interface */
-	if (ipv6_chk_same_addr(dev_net(dev), &ifa->addr, dev, hash)) {
+	if (ipv6_chk_same_addr(net, &ifa->addr, dev, hash)) {
 		netdev_dbg(dev, "ipv6_add_addr: already assigned\n");
 		err = -EEXIST;
 	} else {
-		hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]);
+		hlist_add_head_rcu(&ifa->addr_lst, &net->ipv6.inet6_addr_lst[hash]);
 	}
 
-	spin_unlock(&addrconf_hash_lock);
+	spin_unlock(&net->ipv6.addrconf_hash_lock);
 
 	return err;
 }
@@ -1119,6 +1115,7 @@ ipv6_add_addr(struct inet6_dev *idev, struct ifa6_config *cfg,
 	ifa->prefix_len = cfg->plen;
 	ifa->rt_priority = cfg->rt_priority;
 	ifa->flags = cfg->ifa_flags;
+	ifa->ifa_proto = cfg->ifa_proto;
 	/* No need to add the TENTATIVE flag for addresses with NODAD */
 	if (!(cfg->ifa_flags & IFA_F_NODAD))
 		ifa->flags |= IFA_F_TENTATIVE;
@@ -1261,9 +1258,10 @@ cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires,
 
 static void ipv6_del_addr(struct inet6_ifaddr *ifp)
 {
-	int state;
 	enum cleanup_prefix_rt_t action = CLEANUP_PREFIX_RT_NOP;
+	struct net *net = dev_net(ifp->idev->dev);
 	unsigned long expires;
+	int state;
 
 	ASSERT_RTNL();
 
@@ -1275,9 +1273,9 @@ static void ipv6_del_addr(struct inet6_ifaddr *ifp)
 	if (state == INET6_IFADDR_STATE_DEAD)
 		goto out;
 
-	spin_lock_bh(&addrconf_hash_lock);
+	spin_lock_bh(&net->ipv6.addrconf_hash_lock);
 	hlist_del_init_rcu(&ifp->addr_lst);
-	spin_unlock_bh(&addrconf_hash_lock);
+	spin_unlock_bh(&net->ipv6.addrconf_hash_lock);
 
 	write_lock_bh(&ifp->idev->lock);
 
@@ -1920,10 +1918,8 @@ __ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
 	if (skip_dev_check)
 		dev = NULL;
 
-	hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) {
+	hlist_for_each_entry_rcu(ifp, &net->ipv6.inet6_addr_lst[hash], addr_lst) {
 		ndev = ifp->idev->dev;
-		if (!net_eq(dev_net(ndev), net))
-			continue;
 
 		if (l3mdev_master_dev_rcu(ndev) != l3mdev)
 			continue;
@@ -2027,9 +2023,7 @@ struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *add
 	struct inet6_ifaddr *ifp, *result = NULL;
 
 	rcu_read_lock();
-	hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) {
-		if (!net_eq(dev_net(ifp->idev->dev), net))
-			continue;
+	hlist_for_each_entry_rcu(ifp, &net->ipv6.inet6_addr_lst[hash], addr_lst) {
 		if (ipv6_addr_equal(&ifp->addr, addr)) {
 			if (!dev || ifp->idev->dev == dev ||
 			    !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
@@ -2096,7 +2090,7 @@ static int addrconf_dad_end(struct inet6_ifaddr *ifp)
 void addrconf_dad_failure(struct sk_buff *skb, struct inet6_ifaddr *ifp)
 {
 	struct inet6_dev *idev = ifp->idev;
-	struct net *net = dev_net(ifp->idev->dev);
+	struct net *net = dev_net(idev->dev);
 
 	if (addrconf_dad_end(ifp)) {
 		in6_ifa_put(ifp);
@@ -2600,6 +2594,7 @@ int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev,
 			.valid_lft = valid_lft,
 			.preferred_lft = prefered_lft,
 			.scope = addr_type & IPV6_ADDR_SCOPE_MASK,
+			.ifa_proto = IFAPROT_KERNEL_RA
 		};
 
 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
@@ -2675,7 +2670,7 @@ int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev,
 				 create, now);
 
 		in6_ifa_put(ifp);
-		addrconf_verify();
+		addrconf_verify(net);
 	}
 
 	return 0;
@@ -2987,7 +2982,7 @@ static int inet6_addr_add(struct net *net, int ifindex,
 			manage_tempaddrs(idev, ifp, cfg->valid_lft,
 					 cfg->preferred_lft, true, jiffies);
 		in6_ifa_put(ifp);
-		addrconf_verify_rtnl();
+		addrconf_verify_rtnl(net);
 		return 0;
 	} else if (cfg->ifa_flags & IFA_F_MCAUTOJOIN) {
 		ipv6_mc_config(net->ipv6.mc_autojoin_sk, false,
@@ -3027,7 +3022,7 @@ static int inet6_addr_del(struct net *net, int ifindex, u32 ifa_flags,
 				manage_tempaddrs(idev, ifp, 0, 0, false,
 						 jiffies);
 			ipv6_del_addr(ifp);
-			addrconf_verify_rtnl();
+			addrconf_verify_rtnl(net);
 			if (ipv6_addr_is_multicast(pfx)) {
 				ipv6_mc_config(net->ipv6.mc_autojoin_sk,
 					       false, pfx, dev->ifindex);
@@ -3084,7 +3079,7 @@ int addrconf_del_ifaddr(struct net *net, void __user *arg)
 }
 
 static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
-		     int plen, int scope)
+		     int plen, int scope, u8 proto)
 {
 	struct inet6_ifaddr *ifp;
 	struct ifa6_config cfg = {
@@ -3093,7 +3088,8 @@ static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
 		.ifa_flags = IFA_F_PERMANENT,
 		.valid_lft = INFINITY_LIFE_TIME,
 		.preferred_lft = INFINITY_LIFE_TIME,
-		.scope = scope
+		.scope = scope,
+		.ifa_proto = proto
 	};
 
 	ifp = ipv6_add_addr(idev, &cfg, true, NULL);
@@ -3138,7 +3134,7 @@ static void add_v4_addrs(struct inet6_dev *idev)
 	}
 
 	if (addr.s6_addr32[3]) {
-		add_addr(idev, &addr, plen, scope);
+		add_addr(idev, &addr, plen, scope, IFAPROT_UNSPEC);
 		addrconf_prefix_route(&addr, plen, 0, idev->dev, 0, pflags,
 				      GFP_KERNEL);
 		return;
@@ -3161,7 +3157,8 @@ static void add_v4_addrs(struct inet6_dev *idev)
 					flag |= IFA_HOST;
 				}
 
-				add_addr(idev, &addr, plen, flag);
+				add_addr(idev, &addr, plen, flag,
+					 IFAPROT_UNSPEC);
 				addrconf_prefix_route(&addr, plen, 0, idev->dev,
 						      0, pflags, GFP_KERNEL);
 			}
@@ -3184,7 +3181,7 @@ static void init_loopback(struct net_device *dev)
 		return;
 	}
 
-	add_addr(idev, &in6addr_loopback, 128, IFA_HOST);
+	add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFAPROT_KERNEL_LO);
 }
 
 void addrconf_add_linklocal(struct inet6_dev *idev,
@@ -3196,7 +3193,8 @@ void addrconf_add_linklocal(struct inet6_dev *idev,
 		.ifa_flags = flags | IFA_F_PERMANENT,
 		.valid_lft = INFINITY_LIFE_TIME,
 		.preferred_lft = INFINITY_LIFE_TIME,
-		.scope = IFA_LINK
+		.scope = IFA_LINK,
+		.ifa_proto = IFAPROT_KERNEL_LL
 	};
 	struct inet6_ifaddr *ifp;
 
@@ -3773,9 +3771,9 @@ static int addrconf_ifdown(struct net_device *dev, bool unregister)
 
 	/* Step 2: clear hash table */
 	for (i = 0; i < IN6_ADDR_HSIZE; i++) {
-		struct hlist_head *h = &inet6_addr_lst[i];
+		struct hlist_head *h = &net->ipv6.inet6_addr_lst[i];
 
-		spin_lock_bh(&addrconf_hash_lock);
+		spin_lock_bh(&net->ipv6.addrconf_hash_lock);
 restart:
 		hlist_for_each_entry_rcu(ifa, h, addr_lst) {
 			if (ifa->idev == idev) {
@@ -3791,7 +3789,7 @@ restart:
 				}
 			}
 		}
-		spin_unlock_bh(&addrconf_hash_lock);
+		spin_unlock_bh(&net->ipv6.addrconf_hash_lock);
 	}
 
 	write_lock_bh(&idev->lock);
@@ -4250,7 +4248,7 @@ static void addrconf_dad_completed(struct inet6_ifaddr *ifp, bool bump_id,
 	 * before this temporary address becomes deprecated.
 	 */
 	if (ifp->flags & IFA_F_TEMPORARY)
-		addrconf_verify_rtnl();
+		addrconf_verify_rtnl(dev_net(dev));
 }
 
 static void addrconf_dad_run(struct inet6_dev *idev, bool restart)
@@ -4292,10 +4290,8 @@ static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos)
 	}
 
 	for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
-		hlist_for_each_entry_rcu(ifa, &inet6_addr_lst[state->bucket],
+		hlist_for_each_entry_rcu(ifa, &net->ipv6.inet6_addr_lst[state->bucket],
 					 addr_lst) {
-			if (!net_eq(dev_net(ifa->idev->dev), net))
-				continue;
 			/* sync with offset */
 			if (p < state->offset) {
 				p++;
@@ -4318,8 +4314,6 @@ static struct inet6_ifaddr *if6_get_next(struct seq_file *seq,
 	struct net *net = seq_file_net(seq);
 
 	hlist_for_each_entry_continue_rcu(ifa, addr_lst) {
-		if (!net_eq(dev_net(ifa->idev->dev), net))
-			continue;
 		state->offset++;
 		return ifa;
 	}
@@ -4327,9 +4321,7 @@ static struct inet6_ifaddr *if6_get_next(struct seq_file *seq,
 	state->offset = 0;
 	while (++state->bucket < IN6_ADDR_HSIZE) {
 		hlist_for_each_entry_rcu(ifa,
-				     &inet6_addr_lst[state->bucket], addr_lst) {
-			if (!net_eq(dev_net(ifa->idev->dev), net))
-				continue;
+				     &net->ipv6.inet6_addr_lst[state->bucket], addr_lst) {
 			return ifa;
 		}
 	}
@@ -4417,9 +4409,7 @@ int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr)
 	int ret = 0;
 
 	rcu_read_lock();
-	hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) {
-		if (!net_eq(dev_net(ifp->idev->dev), net))
-			continue;
+	hlist_for_each_entry_rcu(ifp, &net->ipv6.inet6_addr_lst[hash], addr_lst) {
 		if (ipv6_addr_equal(&ifp->addr, addr) &&
 		    (ifp->flags & IFA_F_HOMEADDRESS)) {
 			ret = 1;
@@ -4457,9 +4447,7 @@ int ipv6_chk_rpl_srh_loop(struct net *net, const struct in6_addr *segs,
 		hash = inet6_addr_hash(net, addr);
 
 		hash_found = false;
-		hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) {
-			if (!net_eq(dev_net(ifp->idev->dev), net))
-				continue;
+		hlist_for_each_entry_rcu(ifp, &net->ipv6.inet6_addr_lst[hash], addr_lst) {
 
 			if (ipv6_addr_equal(&ifp->addr, addr)) {
 				hash_found = true;
@@ -4488,7 +4476,7 @@ int ipv6_chk_rpl_srh_loop(struct net *net, const struct in6_addr *segs,
  *	Periodic address status verification
  */
 
-static void addrconf_verify_rtnl(void)
+static void addrconf_verify_rtnl(struct net *net)
 {
 	unsigned long now, next, next_sec, next_sched;
 	struct inet6_ifaddr *ifp;
@@ -4500,11 +4488,11 @@ static void addrconf_verify_rtnl(void)
 	now = jiffies;
 	next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY);
 
-	cancel_delayed_work(&addr_chk_work);
+	cancel_delayed_work(&net->ipv6.addr_chk_work);
 
 	for (i = 0; i < IN6_ADDR_HSIZE; i++) {
 restart:
-		hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[i], addr_lst) {
+		hlist_for_each_entry_rcu_bh(ifp, &net->ipv6.inet6_addr_lst[i], addr_lst) {
 			unsigned long age;
 
 			/* When setting preferred_lft to a value not zero or
@@ -4603,20 +4591,23 @@ restart:
 
 	pr_debug("now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
 		 now, next, next_sec, next_sched);
-	mod_delayed_work(addrconf_wq, &addr_chk_work, next_sched - now);
+	mod_delayed_work(addrconf_wq, &net->ipv6.addr_chk_work, next_sched - now);
 	rcu_read_unlock_bh();
 }
 
 static void addrconf_verify_work(struct work_struct *w)
 {
+	struct net *net = container_of(to_delayed_work(w), struct net,
+				       ipv6.addr_chk_work);
+
 	rtnl_lock();
-	addrconf_verify_rtnl();
+	addrconf_verify_rtnl(net);
 	rtnl_unlock();
 }
 
-static void addrconf_verify(void)
+static void addrconf_verify(struct net *net)
 {
-	mod_delayed_work(addrconf_wq, &addr_chk_work, 0);
+	mod_delayed_work(addrconf_wq, &net->ipv6.addr_chk_work, 0);
 }
 
 static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local,
@@ -4645,6 +4636,7 @@ static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
 	[IFA_FLAGS]		= { .len = sizeof(u32) },
 	[IFA_RT_PRIORITY]	= { .len = sizeof(u32) },
 	[IFA_TARGET_NETNSID]	= { .type = NLA_S32 },
+	[IFA_PROTO]		= { .type = NLA_U8 },
 };
 
 static int
@@ -4712,7 +4704,8 @@ static int modify_prefix_route(struct inet6_ifaddr *ifp,
 	return 0;
 }
 
-static int inet6_addr_modify(struct inet6_ifaddr *ifp, struct ifa6_config *cfg)
+static int inet6_addr_modify(struct net *net, struct inet6_ifaddr *ifp,
+			     struct ifa6_config *cfg)
 {
 	u32 flags;
 	clock_t expires;
@@ -4769,6 +4762,7 @@ static int inet6_addr_modify(struct inet6_ifaddr *ifp, struct ifa6_config *cfg)
 	ifp->tstamp = jiffies;
 	ifp->valid_lft = cfg->valid_lft;
 	ifp->prefered_lft = cfg->preferred_lft;
+	ifp->ifa_proto = cfg->ifa_proto;
 
 	if (cfg->rt_priority && cfg->rt_priority != ifp->rt_priority)
 		ifp->rt_priority = cfg->rt_priority;
@@ -4826,7 +4820,7 @@ static int inet6_addr_modify(struct inet6_ifaddr *ifp, struct ifa6_config *cfg)
 				 jiffies);
 	}
 
-	addrconf_verify_rtnl();
+	addrconf_verify_rtnl(net);
 
 	return 0;
 }
@@ -4862,6 +4856,9 @@ inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh,
 	if (tb[IFA_RT_PRIORITY])
 		cfg.rt_priority = nla_get_u32(tb[IFA_RT_PRIORITY]);
 
+	if (tb[IFA_PROTO])
+		cfg.ifa_proto = nla_get_u8(tb[IFA_PROTO]);
+
 	cfg.valid_lft = INFINITY_LIFE_TIME;
 	cfg.preferred_lft = INFINITY_LIFE_TIME;
 
@@ -4913,7 +4910,7 @@ inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh,
 	    !(nlh->nlmsg_flags & NLM_F_REPLACE))
 		err = -EEXIST;
 	else
-		err = inet6_addr_modify(ifa, &cfg);
+		err = inet6_addr_modify(net, ifa, &cfg);
 
 	in6_ifa_put(ifa);
 
@@ -4965,6 +4962,7 @@ static inline int inet6_ifaddr_msgsize(void)
 	       + nla_total_size(16) /* IFA_ADDRESS */
 	       + nla_total_size(sizeof(struct ifa_cacheinfo))
 	       + nla_total_size(4)  /* IFA_FLAGS */
+	       + nla_total_size(1)  /* IFA_PROTO */
 	       + nla_total_size(4)  /* IFA_RT_PRIORITY */;
 }
 
@@ -5044,6 +5042,10 @@ static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
 	if (nla_put_u32(skb, IFA_FLAGS, ifa->flags) < 0)
 		goto error;
 
+	if (ifa->ifa_proto &&
+	    nla_put_u8(skb, IFA_PROTO, ifa->ifa_proto))
+		goto error;
+
 	nlmsg_end(skb, nlh);
 	return 0;
 
@@ -5539,7 +5541,7 @@ static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
 	array[DEVCONF_USE_OPTIMISTIC] = cnf->use_optimistic;
 #endif
 #ifdef CONFIG_IPV6_MROUTE
-	array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
+	array[DEVCONF_MC_FORWARDING] = atomic_read(&cnf->mc_forwarding);
 #endif
 	array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
 	array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
@@ -5800,7 +5802,7 @@ update_lft:
 
 	write_unlock_bh(&idev->lock);
 	inet6_ifinfo_notify(RTM_NEWLINK, idev);
-	addrconf_verify_rtnl();
+	addrconf_verify_rtnl(dev_net(dev));
 	return 0;
 }
 
@@ -7117,6 +7119,14 @@ static int __net_init addrconf_init_net(struct net *net)
 	int err = -ENOMEM;
 	struct ipv6_devconf *all, *dflt;
 
+	spin_lock_init(&net->ipv6.addrconf_hash_lock);
+	INIT_DEFERRABLE_WORK(&net->ipv6.addr_chk_work, addrconf_verify_work);
+	net->ipv6.inet6_addr_lst = kcalloc(IN6_ADDR_HSIZE,
+					   sizeof(struct hlist_head),
+					   GFP_KERNEL);
+	if (!net->ipv6.inet6_addr_lst)
+		goto err_alloc_addr;
+
 	all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL);
 	if (!all)
 		goto err_alloc_all;
@@ -7178,11 +7188,15 @@ err_reg_all:
 err_alloc_dflt:
 	kfree(all);
 err_alloc_all:
+	kfree(net->ipv6.inet6_addr_lst);
+err_alloc_addr:
 	return err;
 }
 
 static void __net_exit addrconf_exit_net(struct net *net)
 {
+	int i;
+
 #ifdef CONFIG_SYSCTL
 	__addrconf_sysctl_unregister(net, net->ipv6.devconf_dflt,
 				     NETCONFA_IFINDEX_DEFAULT);
@@ -7190,7 +7204,19 @@ static void __net_exit addrconf_exit_net(struct net *net)
 				     NETCONFA_IFINDEX_ALL);
 #endif
 	kfree(net->ipv6.devconf_dflt);
+	net->ipv6.devconf_dflt = NULL;
 	kfree(net->ipv6.devconf_all);
+	net->ipv6.devconf_all = NULL;
+
+	cancel_delayed_work_sync(&net->ipv6.addr_chk_work);
+	/*
+	 *	Check hash table, then free it.
+	 */
+	for (i = 0; i < IN6_ADDR_HSIZE; i++)
+		WARN_ON_ONCE(!hlist_empty(&net->ipv6.inet6_addr_lst[i]));
+
+	kfree(net->ipv6.inet6_addr_lst);
+	net->ipv6.inet6_addr_lst = NULL;
 }
 
 static struct pernet_operations addrconf_ops = {
@@ -7213,7 +7239,7 @@ static struct rtnl_af_ops inet6_ops __read_mostly = {
 int __init addrconf_init(void)
 {
 	struct inet6_dev *idev;
-	int i, err;
+	int err;
 
 	err = ipv6_addr_label_init();
 	if (err < 0) {
@@ -7232,26 +7258,8 @@ int __init addrconf_init(void)
 		goto out_nowq;
 	}
 
-	/* The addrconf netdev notifier requires that loopback_dev
-	 * has it's ipv6 private information allocated and setup
-	 * before it can bring up and give link-local addresses
-	 * to other devices which are up.
-	 *
-	 * Unfortunately, loopback_dev is not necessarily the first
-	 * entry in the global dev_base list of net devices.  In fact,
-	 * it is likely to be the very last entry on that list.
-	 * So this causes the notifier registry below to try and
-	 * give link-local addresses to all devices besides loopback_dev
-	 * first, then loopback_dev, which cases all the non-loopback_dev
-	 * devices to fail to get a link-local address.
-	 *
-	 * So, as a temporary fix, allocate the ipv6 structure for
-	 * loopback_dev first by hand.
-	 * Longer term, all of the dependencies ipv6 has upon the loopback
-	 * device and it being up should be removed.
-	 */
 	rtnl_lock();
-	idev = ipv6_add_dev(init_net.loopback_dev);
+	idev = ipv6_add_dev(blackhole_netdev);
 	rtnl_unlock();
 	if (IS_ERR(idev)) {
 		err = PTR_ERR(idev);
@@ -7260,12 +7268,9 @@ int __init addrconf_init(void)
 
 	ip6_route_init_special_entries();
 
-	for (i = 0; i < IN6_ADDR_HSIZE; i++)
-		INIT_HLIST_HEAD(&inet6_addr_lst[i]);
-
 	register_netdevice_notifier(&ipv6_dev_notf);
 
-	addrconf_verify();
+	addrconf_verify(&init_net);
 
 	rtnl_af_register(&inet6_ops);
 
@@ -7323,7 +7328,6 @@ out:
 void addrconf_cleanup(void)
 {
 	struct net_device *dev;
-	int i;
 
 	unregister_netdevice_notifier(&ipv6_dev_notf);
 	unregister_pernet_subsys(&addrconf_ops);
@@ -7341,14 +7345,6 @@ void addrconf_cleanup(void)
 	}
 	addrconf_ifdown(init_net.loopback_dev, true);
 
-	/*
-	 *	Check hash table.
-	 */
-	spin_lock_bh(&addrconf_hash_lock);
-	for (i = 0; i < IN6_ADDR_HSIZE; i++)
-		WARN_ON(!hlist_empty(&inet6_addr_lst[i]));
-	spin_unlock_bh(&addrconf_hash_lock);
-	cancel_delayed_work(&addr_chk_work);
 	rtnl_unlock();
 
 	destroy_workqueue(addrconf_wq);
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 8fe7900f1949..7d7b7523d126 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -441,11 +441,14 @@ int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 {
 	struct sock *sk = sock->sk;
 	u32 flags = BIND_WITH_LOCK;
+	const struct proto *prot;
 	int err = 0;
 
+	/* IPV6_ADDRFORM can change sk->sk_prot under us. */
+	prot = READ_ONCE(sk->sk_prot);
 	/* If the socket has its own bind function then use it. */
-	if (sk->sk_prot->bind)
-		return sk->sk_prot->bind(sk, uaddr, addr_len);
+	if (prot->bind)
+		return prot->bind(sk, uaddr, addr_len);
 
 	if (addr_len < SIN6_LEN_RFC2133)
 		return -EINVAL;
@@ -555,6 +558,7 @@ int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 	void __user *argp = (void __user *)arg;
 	struct sock *sk = sock->sk;
 	struct net *net = sock_net(sk);
+	const struct proto *prot;
 
 	switch (cmd) {
 	case SIOCADDRT:
@@ -572,9 +576,11 @@ int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 	case SIOCSIFDSTADDR:
 		return addrconf_set_dstaddr(net, argp);
 	default:
-		if (!sk->sk_prot->ioctl)
+		/* IPV6_ADDRFORM can change sk->sk_prot under us. */
+		prot = READ_ONCE(sk->sk_prot);
+		if (!prot->ioctl)
 			return -ENOIOCTLCMD;
-		return sk->sk_prot->ioctl(sk, cmd, arg);
+		return prot->ioctl(sk, cmd, arg);
 	}
 	/*NOTREACHED*/
 	return 0;
@@ -636,11 +642,14 @@ INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock *, struct msghdr *,
 int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
 {
 	struct sock *sk = sock->sk;
+	const struct proto *prot;
 
 	if (unlikely(inet_send_prepare(sk)))
 		return -EAGAIN;
 
-	return INDIRECT_CALL_2(sk->sk_prot->sendmsg, tcp_sendmsg, udpv6_sendmsg,
+	/* IPV6_ADDRFORM can change sk->sk_prot under us. */
+	prot = READ_ONCE(sk->sk_prot);
+	return INDIRECT_CALL_2(prot->sendmsg, tcp_sendmsg, udpv6_sendmsg,
 			       sk, msg, size);
 }
 
@@ -650,13 +659,16 @@ int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
 		  int flags)
 {
 	struct sock *sk = sock->sk;
+	const struct proto *prot;
 	int addr_len = 0;
 	int err;
 
 	if (likely(!(flags & MSG_ERRQUEUE)))
 		sock_rps_record_flow(sk);
 
-	err = INDIRECT_CALL_2(sk->sk_prot->recvmsg, tcp_recvmsg, udpv6_recvmsg,
+	/* IPV6_ADDRFORM can change sk->sk_prot under us. */
+	prot = READ_ONCE(sk->sk_prot);
+	err = INDIRECT_CALL_2(prot->recvmsg, tcp_recvmsg, udpv6_recvmsg,
 			      sk, msg, size, flags & MSG_DONTWAIT,
 			      flags & ~MSG_DONTWAIT, &addr_len);
 	if (err >= 0)
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index 77e34aec7e82..658d5eabaf7e 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -1344,14 +1344,14 @@ ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
 	return opt2;
 }
 
-struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
-					  struct ipv6_txoptions *opt)
+struct ipv6_txoptions *__ipv6_fixup_options(struct ipv6_txoptions *opt_space,
+					    struct ipv6_txoptions *opt)
 {
 	/*
 	 * ignore the dest before srcrt unless srcrt is being included.
 	 * --yoshfuji
 	 */
-	if (opt && opt->dst0opt && !opt->srcrt) {
+	if (opt->dst0opt && !opt->srcrt) {
 		if (opt_space != opt) {
 			memcpy(opt_space, opt, sizeof(*opt_space));
 			opt = opt_space;
@@ -1362,7 +1362,7 @@ struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
 
 	return opt;
 }
-EXPORT_SYMBOL_GPL(ipv6_fixup_options);
+EXPORT_SYMBOL_GPL(__ipv6_fixup_options);
 
 /**
  * fl6_update_dst - update flowi destination address with info given
diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
index ec029c86ae06..7c2003833010 100644
--- a/net/ipv6/fib6_rules.c
+++ b/net/ipv6/fib6_rules.c
@@ -16,6 +16,7 @@
 #include <linux/indirect_call_wrapper.h>
 
 #include <net/fib_rules.h>
+#include <net/inet_dscp.h>
 #include <net/ipv6.h>
 #include <net/addrconf.h>
 #include <net/ip6_route.h>
@@ -25,14 +26,14 @@ struct fib6_rule {
 	struct fib_rule		common;
 	struct rt6key		src;
 	struct rt6key		dst;
-	u8			tclass;
+	dscp_t			dscp;
 };
 
 static bool fib6_rule_matchall(const struct fib_rule *rule)
 {
 	struct fib6_rule *r = container_of(rule, struct fib6_rule, common);
 
-	if (r->dst.plen || r->src.plen || r->tclass)
+	if (r->dst.plen || r->src.plen || r->dscp)
 		return false;
 	return fib_rule_matchall(rule);
 }
@@ -323,7 +324,7 @@ INDIRECT_CALLABLE_SCOPE int fib6_rule_match(struct fib_rule *rule,
 			return 0;
 	}
 
-	if (r->tclass && r->tclass != ip6_tclass(fl6->flowlabel))
+	if (r->dscp && r->dscp != ip6_dscp(fl6->flowlabel))
 		return 0;
 
 	if (rule->ip_proto && (rule->ip_proto != fl6->flowi6_proto))
@@ -349,6 +350,13 @@ static int fib6_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
 	struct net *net = sock_net(skb->sk);
 	struct fib6_rule *rule6 = (struct fib6_rule *) rule;
 
+	if (!inet_validate_dscp(frh->tos)) {
+		NL_SET_ERR_MSG(extack,
+			       "Invalid dsfield (tos): ECN bits must be 0");
+		goto errout;
+	}
+	rule6->dscp = inet_dsfield_to_dscp(frh->tos);
+
 	if (rule->action == FR_ACT_TO_TBL && !rule->l3mdev) {
 		if (rule->table == RT6_TABLE_UNSPEC) {
 			NL_SET_ERR_MSG(extack, "Invalid table");
@@ -369,7 +377,6 @@ static int fib6_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
 
 	rule6->src.plen = frh->src_len;
 	rule6->dst.plen = frh->dst_len;
-	rule6->tclass = frh->tos;
 
 	if (fib_rule_requires_fldissect(rule))
 		net->ipv6.fib6_rules_require_fldissect++;
@@ -402,7 +409,7 @@ static int fib6_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh,
 	if (frh->dst_len && (rule6->dst.plen != frh->dst_len))
 		return 0;
 
-	if (frh->tos && (rule6->tclass != frh->tos))
+	if (frh->tos && inet_dscp_to_dsfield(rule6->dscp) != frh->tos)
 		return 0;
 
 	if (frh->src_len &&
@@ -423,7 +430,7 @@ static int fib6_rule_fill(struct fib_rule *rule, struct sk_buff *skb,
 
 	frh->dst_len = rule6->dst.plen;
 	frh->src_len = rule6->src.plen;
-	frh->tos = rule6->tclass;
+	frh->tos = inet_dscp_to_dsfield(rule6->dscp);
 
 	if ((rule6->dst.plen &&
 	     nla_put_in6_addr(skb, FRA_DST, &rule6->dst.addr)) ||
@@ -486,16 +493,21 @@ out_fib6_rules_ops:
 	goto out;
 }
 
-static void __net_exit fib6_rules_net_exit(struct net *net)
+static void __net_exit fib6_rules_net_exit_batch(struct list_head *net_list)
 {
+	struct net *net;
+
 	rtnl_lock();
-	fib_rules_unregister(net->ipv6.fib6_rules_ops);
+	list_for_each_entry(net, net_list, exit_list) {
+		fib_rules_unregister(net->ipv6.fib6_rules_ops);
+		cond_resched();
+	}
 	rtnl_unlock();
 }
 
 static struct pernet_operations fib6_rules_net_ops = {
 	.init = fib6_rules_net_init,
-	.exit = fib6_rules_net_exit,
+	.exit_batch = fib6_rules_net_exit_batch,
 };
 
 int __init fib6_rules_init(void)
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 96c5cc0f30ce..e6b978ea0e87 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -69,17 +69,7 @@
 
 #include <linux/uaccess.h>
 
-/*
- *	The ICMP socket(s). This is the most convenient way to flow control
- *	our ICMP output as well as maintain a clean interface throughout
- *	all layers. All Socketless IP sends will soon be gone.
- *
- *	On SMP we have one ICMP socket per-cpu.
- */
-static struct sock *icmpv6_sk(struct net *net)
-{
-	return this_cpu_read(*net->ipv6.icmp_sk);
-}
+static DEFINE_PER_CPU(struct sock *, ipv6_icmp_sk);
 
 static int icmpv6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 		       u8 type, u8 code, int offset, __be32 info)
@@ -110,11 +100,11 @@ static const struct inet6_protocol icmpv6_protocol = {
 };
 
 /* Called with BH disabled */
-static __inline__ struct sock *icmpv6_xmit_lock(struct net *net)
+static struct sock *icmpv6_xmit_lock(struct net *net)
 {
 	struct sock *sk;
 
-	sk = icmpv6_sk(net);
+	sk = this_cpu_read(ipv6_icmp_sk);
 	if (unlikely(!spin_trylock(&sk->sk_lock.slock))) {
 		/* This can happen if the output path (f.e. SIT or
 		 * ip6ip6 tunnel) signals dst_link_failure() for an
@@ -122,11 +112,13 @@ static __inline__ struct sock *icmpv6_xmit_lock(struct net *net)
 		 */
 		return NULL;
 	}
+	sock_net_set(sk, net);
 	return sk;
 }
 
-static __inline__ void icmpv6_xmit_unlock(struct sock *sk)
+static void icmpv6_xmit_unlock(struct sock *sk)
 {
+	sock_net_set(sk, &init_net);
 	spin_unlock(&sk->sk_lock.slock);
 }
 
@@ -1034,59 +1026,27 @@ void icmpv6_flow_init(struct sock *sk, struct flowi6 *fl6,
 	security_sk_classify_flow(sk, flowi6_to_flowi_common(fl6));
 }
 
-static void __net_exit icmpv6_sk_exit(struct net *net)
-{
-	int i;
-
-	for_each_possible_cpu(i)
-		inet_ctl_sock_destroy(*per_cpu_ptr(net->ipv6.icmp_sk, i));
-	free_percpu(net->ipv6.icmp_sk);
-}
-
-static int __net_init icmpv6_sk_init(struct net *net)
+int __init icmpv6_init(void)
 {
 	struct sock *sk;
 	int err, i;
 
-	net->ipv6.icmp_sk = alloc_percpu(struct sock *);
-	if (!net->ipv6.icmp_sk)
-		return -ENOMEM;
-
 	for_each_possible_cpu(i) {
 		err = inet_ctl_sock_create(&sk, PF_INET6,
-					   SOCK_RAW, IPPROTO_ICMPV6, net);
+					   SOCK_RAW, IPPROTO_ICMPV6, &init_net);
 		if (err < 0) {
 			pr_err("Failed to initialize the ICMP6 control socket (err %d)\n",
 			       err);
-			goto fail;
+			return err;
 		}
 
-		*per_cpu_ptr(net->ipv6.icmp_sk, i) = sk;
+		per_cpu(ipv6_icmp_sk, i) = sk;
 
 		/* Enough space for 2 64K ICMP packets, including
 		 * sk_buff struct overhead.
 		 */
 		sk->sk_sndbuf = 2 * SKB_TRUESIZE(64 * 1024);
 	}
-	return 0;
-
- fail:
-	icmpv6_sk_exit(net);
-	return err;
-}
-
-static struct pernet_operations icmpv6_sk_ops = {
-	.init = icmpv6_sk_init,
-	.exit = icmpv6_sk_exit,
-};
-
-int __init icmpv6_init(void)
-{
-	int err;
-
-	err = register_pernet_subsys(&icmpv6_sk_ops);
-	if (err < 0)
-		return err;
 
 	err = -EAGAIN;
 	if (inet6_add_protocol(&icmpv6_protocol, IPPROTO_ICMPV6) < 0)
@@ -1101,14 +1061,12 @@ sender_reg_err:
 	inet6_del_protocol(&icmpv6_protocol, IPPROTO_ICMPV6);
 fail:
 	pr_err("Failed to register ICMP6 protocol\n");
-	unregister_pernet_subsys(&icmpv6_sk_ops);
 	return err;
 }
 
 void icmpv6_cleanup(void)
 {
 	inet6_unregister_icmp_sender(icmp6_send);
-	unregister_pernet_subsys(&icmpv6_sk_ops);
 	inet6_del_protocol(&icmpv6_protocol, IPPROTO_ICMPV6);
 }
 
diff --git a/net/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c
index 4514444e96c8..4740afecf7c6 100644
--- a/net/ipv6/inet6_hashtables.c
+++ b/net/ipv6/inet6_hashtables.c
@@ -333,11 +333,8 @@ int inet6_hash(struct sock *sk)
 {
 	int err = 0;
 
-	if (sk->sk_state != TCP_CLOSE) {
-		local_bh_disable();
+	if (sk->sk_state != TCP_CLOSE)
 		err = __inet_hash(sk, NULL);
-		local_bh_enable();
-	}
 
 	return err;
 }
diff --git a/net/ipv6/ioam6.c b/net/ipv6/ioam6.c
index e159eb4328a8..1098131ed90c 100644
--- a/net/ipv6/ioam6.c
+++ b/net/ipv6/ioam6.c
@@ -635,7 +635,8 @@ static void __ioam6_fill_trace_data(struct sk_buff *skb,
 				    struct ioam6_schema *sc,
 				    u8 sclen, bool is_input)
 {
-	struct __kernel_sock_timeval ts;
+	struct timespec64 ts;
+	ktime_t tstamp;
 	u64 raw64;
 	u32 raw32;
 	u16 raw16;
@@ -680,10 +681,9 @@ static void __ioam6_fill_trace_data(struct sk_buff *skb,
 		if (!skb->dev) {
 			*(__be32 *)data = cpu_to_be32(IOAM6_U32_UNAVAILABLE);
 		} else {
-			if (!skb->tstamp)
-				__net_timestamp(skb);
+			tstamp = skb_tstamp_cond(skb, true);
+			ts = ktime_to_timespec64(tstamp);
 
-			skb_get_new_timestamp(skb, &ts);
 			*(__be32 *)data = cpu_to_be32((u32)ts.tv_sec);
 		}
 		data += sizeof(__be32);
@@ -694,13 +694,12 @@ static void __ioam6_fill_trace_data(struct sk_buff *skb,
 		if (!skb->dev) {
 			*(__be32 *)data = cpu_to_be32(IOAM6_U32_UNAVAILABLE);
 		} else {
-			if (!skb->tstamp)
-				__net_timestamp(skb);
+			if (!trace->type.bit2) {
+				tstamp = skb_tstamp_cond(skb, true);
+				ts = ktime_to_timespec64(tstamp);
+			}
 
-			if (!trace->type.bit2)
-				skb_get_new_timestamp(skb, &ts);
-
-			*(__be32 *)data = cpu_to_be32((u32)ts.tv_usec);
+			*(__be32 *)data = cpu_to_be32((u32)(ts.tv_nsec / NSEC_PER_USEC));
 		}
 		data += sizeof(__be32);
 	}
diff --git a/net/ipv6/ioam6_iptunnel.c b/net/ipv6/ioam6_iptunnel.c
index f90a87389fcc..f6f5b83dd954 100644
--- a/net/ipv6/ioam6_iptunnel.c
+++ b/net/ipv6/ioam6_iptunnel.c
@@ -32,13 +32,25 @@ struct ioam6_lwt_encap {
 	struct ioam6_trace_hdr traceh;
 } __packed;
 
+struct ioam6_lwt_freq {
+	u32 k;
+	u32 n;
+};
+
 struct ioam6_lwt {
 	struct dst_cache cache;
+	struct ioam6_lwt_freq freq;
+	atomic_t pkt_cnt;
 	u8 mode;
 	struct in6_addr tundst;
 	struct ioam6_lwt_encap	tuninfo;
 };
 
+static struct netlink_range_validation freq_range = {
+	.min = IOAM6_IPTUNNEL_FREQ_MIN,
+	.max = IOAM6_IPTUNNEL_FREQ_MAX,
+};
+
 static struct ioam6_lwt *ioam6_lwt_state(struct lwtunnel_state *lwt)
 {
 	return (struct ioam6_lwt *)lwt->data;
@@ -55,6 +67,8 @@ static struct ioam6_trace_hdr *ioam6_lwt_trace(struct lwtunnel_state *lwt)
 }
 
 static const struct nla_policy ioam6_iptunnel_policy[IOAM6_IPTUNNEL_MAX + 1] = {
+	[IOAM6_IPTUNNEL_FREQ_K] = NLA_POLICY_FULL_RANGE(NLA_U32, &freq_range),
+	[IOAM6_IPTUNNEL_FREQ_N] = NLA_POLICY_FULL_RANGE(NLA_U32, &freq_range),
 	[IOAM6_IPTUNNEL_MODE]	= NLA_POLICY_RANGE(NLA_U8,
 						   IOAM6_IPTUNNEL_MODE_MIN,
 						   IOAM6_IPTUNNEL_MODE_MAX),
@@ -96,6 +110,7 @@ static int ioam6_build_state(struct net *net, struct nlattr *nla,
 	struct lwtunnel_state *lwt;
 	struct ioam6_lwt *ilwt;
 	int len_aligned, err;
+	u32 freq_k, freq_n;
 	u8 mode;
 
 	if (family != AF_INET6)
@@ -106,6 +121,23 @@ static int ioam6_build_state(struct net *net, struct nlattr *nla,
 	if (err < 0)
 		return err;
 
+	if ((!tb[IOAM6_IPTUNNEL_FREQ_K] && tb[IOAM6_IPTUNNEL_FREQ_N]) ||
+	    (tb[IOAM6_IPTUNNEL_FREQ_K] && !tb[IOAM6_IPTUNNEL_FREQ_N])) {
+		NL_SET_ERR_MSG(extack, "freq: missing parameter");
+		return -EINVAL;
+	} else if (!tb[IOAM6_IPTUNNEL_FREQ_K] && !tb[IOAM6_IPTUNNEL_FREQ_N]) {
+		freq_k = IOAM6_IPTUNNEL_FREQ_MIN;
+		freq_n = IOAM6_IPTUNNEL_FREQ_MIN;
+	} else {
+		freq_k = nla_get_u32(tb[IOAM6_IPTUNNEL_FREQ_K]);
+		freq_n = nla_get_u32(tb[IOAM6_IPTUNNEL_FREQ_N]);
+
+		if (freq_k > freq_n) {
+			NL_SET_ERR_MSG(extack, "freq: k > n is forbidden");
+			return -EINVAL;
+		}
+	}
+
 	if (!tb[IOAM6_IPTUNNEL_MODE])
 		mode = IOAM6_IPTUNNEL_MODE_INLINE;
 	else
@@ -140,6 +172,10 @@ static int ioam6_build_state(struct net *net, struct nlattr *nla,
 		return err;
 	}
 
+	atomic_set(&ilwt->pkt_cnt, 0);
+	ilwt->freq.k = freq_k;
+	ilwt->freq.n = freq_n;
+
 	ilwt->mode = mode;
 	if (tb[IOAM6_IPTUNNEL_DST])
 		ilwt->tundst = nla_get_in6_addr(tb[IOAM6_IPTUNNEL_DST]);
@@ -263,11 +299,18 @@ static int ioam6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
 	struct in6_addr orig_daddr;
 	struct ioam6_lwt *ilwt;
 	int err = -EINVAL;
+	u32 pkt_cnt;
 
 	if (skb->protocol != htons(ETH_P_IPV6))
 		goto drop;
 
 	ilwt = ioam6_lwt_state(dst->lwtstate);
+
+	/* Check for insertion frequency (i.e., "k over n" insertions) */
+	pkt_cnt = atomic_fetch_inc(&ilwt->pkt_cnt);
+	if (pkt_cnt % ilwt->freq.n >= ilwt->freq.k)
+		goto out;
+
 	orig_daddr = ipv6_hdr(skb)->daddr;
 
 	switch (ilwt->mode) {
@@ -358,6 +401,14 @@ static int ioam6_fill_encap_info(struct sk_buff *skb,
 	struct ioam6_lwt *ilwt = ioam6_lwt_state(lwtstate);
 	int err;
 
+	err = nla_put_u32(skb, IOAM6_IPTUNNEL_FREQ_K, ilwt->freq.k);
+	if (err)
+		goto ret;
+
+	err = nla_put_u32(skb, IOAM6_IPTUNNEL_FREQ_N, ilwt->freq.n);
+	if (err)
+		goto ret;
+
 	err = nla_put_u8(skb, IOAM6_IPTUNNEL_MODE, ilwt->mode);
 	if (err)
 		goto ret;
@@ -379,7 +430,9 @@ static int ioam6_encap_nlsize(struct lwtunnel_state *lwtstate)
 	struct ioam6_lwt *ilwt = ioam6_lwt_state(lwtstate);
 	int nlsize;
 
-	nlsize = nla_total_size(sizeof(ilwt->mode)) +
+	nlsize = nla_total_size(sizeof(ilwt->freq.k)) +
+		  nla_total_size(sizeof(ilwt->freq.n)) +
+		  nla_total_size(sizeof(ilwt->mode)) +
 		  nla_total_size(sizeof(ilwt->tuninfo.traceh));
 
 	if (ilwt->mode != IOAM6_IPTUNNEL_MODE_INLINE)
@@ -395,7 +448,9 @@ static int ioam6_encap_cmp(struct lwtunnel_state *a, struct lwtunnel_state *b)
 	struct ioam6_lwt *ilwt_a = ioam6_lwt_state(a);
 	struct ioam6_lwt *ilwt_b = ioam6_lwt_state(b);
 
-	return (ilwt_a->mode != ilwt_b->mode ||
+	return (ilwt_a->freq.k != ilwt_b->freq.k ||
+		ilwt_a->freq.n != ilwt_b->freq.n ||
+		ilwt_a->mode != ilwt_b->mode ||
 		(ilwt_a->mode != IOAM6_IPTUNNEL_MODE_INLINE &&
 		 !ipv6_addr_equal(&ilwt_a->tundst, &ilwt_b->tundst)) ||
 		trace_a->namespace_id != trace_b->namespace_id);
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index 80256717868e..5b5ea35635f9 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -459,6 +459,7 @@ discard:
 
 static int ip6_input_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
 {
+	skb_clear_delivery_time(skb);
 	rcu_read_lock();
 	ip6_protocol_deliver_rcu(net, skb, 0, false);
 	rcu_read_unlock();
@@ -508,7 +509,7 @@ int ip6_mc_input(struct sk_buff *skb)
 	/*
 	 *      IPv6 multicast router mode is now supported ;)
 	 */
-	if (dev_net(skb->dev)->ipv6.devconf_all->mc_forwarding &&
+	if (atomic_read(&dev_net(skb->dev)->ipv6.devconf_all->mc_forwarding) &&
 	    !(ipv6_addr_type(&hdr->daddr) &
 	      (IPV6_ADDR_LOOPBACK|IPV6_ADDR_LINKLOCAL)) &&
 	    likely(!(IP6CB(skb)->flags & IP6SKB_FORWARDED))) {
diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c
index 5f577e21459b..c4fc03c1ac99 100644
--- a/net/ipv6/ip6_offload.c
+++ b/net/ipv6/ip6_offload.c
@@ -251,7 +251,7 @@ INDIRECT_CALLABLE_SCOPE struct sk_buff *ipv6_gro_receive(struct list_head *head,
 		 if ((first_word & htonl(0xF00FFFFF)) ||
 		     !ipv6_addr_equal(&iph->saddr, &iph2->saddr) ||
 		     !ipv6_addr_equal(&iph->daddr, &iph2->daddr) ||
-		     *(u16 *)&iph->nexthdr != *(u16 *)&iph2->nexthdr) {
+		     iph->nexthdr != iph2->nexthdr) {
 not_same_flow:
 			NAPI_GRO_CB(p)->same_flow = 0;
 			continue;
@@ -262,7 +262,8 @@ not_same_flow:
 				goto not_same_flow;
 		}
 		/* flush if Traffic Class fields are different */
-		NAPI_GRO_CB(p)->flush |= !!(first_word & htonl(0x0FF00000));
+		NAPI_GRO_CB(p)->flush |= !!((first_word & htonl(0x0FF00000)) |
+			(__force __be32)(iph->hop_limit ^ iph2->hop_limit));
 		NAPI_GRO_CB(p)->flush |= flush;
 
 		/* If the previous IP ID value was based on an atomic
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 194832663d85..e23f058166af 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -130,7 +130,7 @@ static int ip6_finish_output2(struct net *net, struct sock *sk, struct sk_buff *
 	rcu_read_unlock_bh();
 
 	IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTNOROUTES);
-	kfree_skb(skb);
+	kfree_skb_reason(skb, SKB_DROP_REASON_NEIGH_CREATEFAIL);
 	return -EINVAL;
 }
 
@@ -202,7 +202,7 @@ static int ip6_finish_output(struct net *net, struct sock *sk, struct sk_buff *s
 	case NET_XMIT_CN:
 		return __ip6_finish_output(net, sk, skb) ? : ret;
 	default:
-		kfree_skb(skb);
+		kfree_skb_reason(skb, SKB_DROP_REASON_BPF_CGROUP_EGRESS);
 		return ret;
 	}
 }
@@ -217,7 +217,7 @@ int ip6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
 
 	if (unlikely(idev->cnf.disable_ipv6)) {
 		IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS);
-		kfree_skb(skb);
+		kfree_skb_reason(skb, SKB_DROP_REASON_IPV6DISABLED);
 		return 0;
 	}
 
@@ -440,7 +440,7 @@ static inline int ip6_forward_finish(struct net *net, struct sock *sk,
 	}
 #endif
 
-	skb->tstamp = 0;
+	skb_clear_tstamp(skb);
 	return dst_output(net, sk, skb);
 }
 
@@ -813,6 +813,7 @@ int ip6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
 	struct rt6_info *rt = (struct rt6_info *)skb_dst(skb);
 	struct ipv6_pinfo *np = skb->sk && !dev_recursion_level() ?
 				inet6_sk(skb->sk) : NULL;
+	bool mono_delivery_time = skb->mono_delivery_time;
 	struct ip6_frag_state state;
 	unsigned int mtu, hlen, nexthdr_offset;
 	ktime_t tstamp = skb->tstamp;
@@ -903,7 +904,7 @@ int ip6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
 			if (iter.frag)
 				ip6_fraglist_prepare(skb, &iter);
 
-			skb->tstamp = tstamp;
+			skb_set_delivery_time(skb, tstamp, mono_delivery_time);
 			err = output(net, sk, skb);
 			if (!err)
 				IP6_INC_STATS(net, ip6_dst_idev(&rt->dst),
@@ -962,7 +963,7 @@ slow_path:
 		/*
 		 *	Put this fragment into the sending queue.
 		 */
-		frag->tstamp = tstamp;
+		skb_set_delivery_time(frag, tstamp, mono_delivery_time);
 		err = output(net, sk, frag);
 		if (err)
 			goto fail;
@@ -1034,8 +1035,7 @@ static struct dst_entry *ip6_sk_dst_check(struct sock *sk,
 #ifdef CONFIG_IPV6_SUBTREES
 	    ip6_rt_check(&rt->rt6i_src, &fl6->saddr, np->saddr_cache) ||
 #endif
-	   (!(fl6->flowi6_flags & FLOWI_FLAG_SKIP_NH_OIF) &&
-	      (fl6->flowi6_oif && fl6->flowi6_oif != dst->dev->ifindex))) {
+	   (fl6->flowi6_oif && fl6->flowi6_oif != dst->dev->ifindex)) {
 		dst_release(dst);
 		dst = NULL;
 	}
@@ -1350,11 +1350,16 @@ static void ip6_append_data_mtu(unsigned int *mtu,
 
 static int ip6_setup_cork(struct sock *sk, struct inet_cork_full *cork,
 			  struct inet6_cork *v6_cork, struct ipcm6_cookie *ipc6,
-			  struct rt6_info *rt, struct flowi6 *fl6)
+			  struct rt6_info *rt)
 {
 	struct ipv6_pinfo *np = inet6_sk(sk);
 	unsigned int mtu;
-	struct ipv6_txoptions *opt = ipc6->opt;
+	struct ipv6_txoptions *nopt, *opt = ipc6->opt;
+
+	/* callers pass dst together with a reference, set it first so
+	 * ip6_cork_release() can put it down even in case of an error.
+	 */
+	cork->base.dst = &rt->dst;
 
 	/*
 	 * setup for corking
@@ -1363,39 +1368,32 @@ static int ip6_setup_cork(struct sock *sk, struct inet_cork_full *cork,
 		if (WARN_ON(v6_cork->opt))
 			return -EINVAL;
 
-		v6_cork->opt = kzalloc(sizeof(*opt), sk->sk_allocation);
-		if (unlikely(!v6_cork->opt))
+		nopt = v6_cork->opt = kzalloc(sizeof(*opt), sk->sk_allocation);
+		if (unlikely(!nopt))
 			return -ENOBUFS;
 
-		v6_cork->opt->tot_len = sizeof(*opt);
-		v6_cork->opt->opt_flen = opt->opt_flen;
-		v6_cork->opt->opt_nflen = opt->opt_nflen;
+		nopt->tot_len = sizeof(*opt);
+		nopt->opt_flen = opt->opt_flen;
+		nopt->opt_nflen = opt->opt_nflen;
 
-		v6_cork->opt->dst0opt = ip6_opt_dup(opt->dst0opt,
-						    sk->sk_allocation);
-		if (opt->dst0opt && !v6_cork->opt->dst0opt)
+		nopt->dst0opt = ip6_opt_dup(opt->dst0opt, sk->sk_allocation);
+		if (opt->dst0opt && !nopt->dst0opt)
 			return -ENOBUFS;
 
-		v6_cork->opt->dst1opt = ip6_opt_dup(opt->dst1opt,
-						    sk->sk_allocation);
-		if (opt->dst1opt && !v6_cork->opt->dst1opt)
+		nopt->dst1opt = ip6_opt_dup(opt->dst1opt, sk->sk_allocation);
+		if (opt->dst1opt && !nopt->dst1opt)
 			return -ENOBUFS;
 
-		v6_cork->opt->hopopt = ip6_opt_dup(opt->hopopt,
-						   sk->sk_allocation);
-		if (opt->hopopt && !v6_cork->opt->hopopt)
+		nopt->hopopt = ip6_opt_dup(opt->hopopt, sk->sk_allocation);
+		if (opt->hopopt && !nopt->hopopt)
 			return -ENOBUFS;
 
-		v6_cork->opt->srcrt = ip6_rthdr_dup(opt->srcrt,
-						    sk->sk_allocation);
-		if (opt->srcrt && !v6_cork->opt->srcrt)
+		nopt->srcrt = ip6_rthdr_dup(opt->srcrt, sk->sk_allocation);
+		if (opt->srcrt && !nopt->srcrt)
 			return -ENOBUFS;
 
 		/* need source address above miyazawa*/
 	}
-	dst_hold(&rt->dst);
-	cork->base.dst = &rt->dst;
-	cork->fl.u.ip6 = *fl6;
 	v6_cork->hop_limit = ipc6->hlimit;
 	v6_cork->tclass = ipc6->tclass;
 	if (rt->dst.flags & DST_XFRM_TUNNEL)
@@ -1424,9 +1422,8 @@ static int ip6_setup_cork(struct sock *sk, struct inet_cork_full *cork,
 }
 
 static int __ip6_append_data(struct sock *sk,
-			     struct flowi6 *fl6,
 			     struct sk_buff_head *queue,
-			     struct inet_cork *cork,
+			     struct inet_cork_full *cork_full,
 			     struct inet6_cork *v6_cork,
 			     struct page_frag *pfrag,
 			     int getfrag(void *from, char *to, int offset,
@@ -1435,6 +1432,8 @@ static int __ip6_append_data(struct sock *sk,
 			     unsigned int flags, struct ipcm6_cookie *ipc6)
 {
 	struct sk_buff *skb, *skb_prev = NULL;
+	struct inet_cork *cork = &cork_full->base;
+	struct flowi6 *fl6 = &cork_full->fl.u.ip6;
 	unsigned int maxfraglen, fragheaderlen, mtu, orig_mtu, pmtu;
 	struct ubuf_info *uarg = NULL;
 	int exthdrlen = 0;
@@ -1491,6 +1490,7 @@ static int __ip6_append_data(struct sock *sk,
 
 	if (cork->length + length > mtu - headersize && ipc6->dontfrag &&
 	    (sk->sk_protocol == IPPROTO_UDP ||
+	     sk->sk_protocol == IPPROTO_ICMPV6 ||
 	     sk->sk_protocol == IPPROTO_RAW)) {
 		ipv6_local_rxpmtu(sk, fl6, mtu - headersize +
 				sizeof(struct ipv6hdr));
@@ -1791,34 +1791,46 @@ int ip6_append_data(struct sock *sk,
 		/*
 		 * setup for corking
 		 */
+		dst_hold(&rt->dst);
 		err = ip6_setup_cork(sk, &inet->cork, &np->cork,
-				     ipc6, rt, fl6);
+				     ipc6, rt);
 		if (err)
 			return err;
 
+		inet->cork.fl.u.ip6 = *fl6;
 		exthdrlen = (ipc6->opt ? ipc6->opt->opt_flen : 0);
 		length += exthdrlen;
 		transhdrlen += exthdrlen;
 	} else {
-		fl6 = &inet->cork.fl.u.ip6;
 		transhdrlen = 0;
 	}
 
-	return __ip6_append_data(sk, fl6, &sk->sk_write_queue, &inet->cork.base,
+	return __ip6_append_data(sk, &sk->sk_write_queue, &inet->cork,
 				 &np->cork, sk_page_frag(sk), getfrag,
 				 from, length, transhdrlen, flags, ipc6);
 }
 EXPORT_SYMBOL_GPL(ip6_append_data);
 
+static void ip6_cork_steal_dst(struct sk_buff *skb, struct inet_cork_full *cork)
+{
+	struct dst_entry *dst = cork->base.dst;
+
+	cork->base.dst = NULL;
+	cork->base.flags &= ~IPCORK_ALLFRAG;
+	skb_dst_set(skb, dst);
+}
+
 static void ip6_cork_release(struct inet_cork_full *cork,
 			     struct inet6_cork *v6_cork)
 {
 	if (v6_cork->opt) {
-		kfree(v6_cork->opt->dst0opt);
-		kfree(v6_cork->opt->dst1opt);
-		kfree(v6_cork->opt->hopopt);
-		kfree(v6_cork->opt->srcrt);
-		kfree(v6_cork->opt);
+		struct ipv6_txoptions *opt = v6_cork->opt;
+
+		kfree(opt->dst0opt);
+		kfree(opt->dst1opt);
+		kfree(opt->hopopt);
+		kfree(opt->srcrt);
+		kfree(opt);
 		v6_cork->opt = NULL;
 	}
 
@@ -1827,7 +1839,6 @@ static void ip6_cork_release(struct inet_cork_full *cork,
 		cork->base.dst = NULL;
 		cork->base.flags &= ~IPCORK_ALLFRAG;
 	}
-	memset(&cork->fl, 0, sizeof(cork->fl));
 }
 
 struct sk_buff *__ip6_make_skb(struct sock *sk,
@@ -1837,7 +1848,7 @@ struct sk_buff *__ip6_make_skb(struct sock *sk,
 {
 	struct sk_buff *skb, *tmp_skb;
 	struct sk_buff **tail_skb;
-	struct in6_addr final_dst_buf, *final_dst = &final_dst_buf;
+	struct in6_addr *final_dst;
 	struct ipv6_pinfo *np = inet6_sk(sk);
 	struct net *net = sock_net(sk);
 	struct ipv6hdr *hdr;
@@ -1867,9 +1878,9 @@ struct sk_buff *__ip6_make_skb(struct sock *sk,
 
 	/* Allow local fragmentation. */
 	skb->ignore_df = ip6_sk_ignore_df(sk);
-
-	*final_dst = fl6->daddr;
 	__skb_pull(skb, skb_network_header_len(skb));
+
+	final_dst = &fl6->daddr;
 	if (opt && opt->opt_flen)
 		ipv6_push_frag_opts(skb, opt, &proto);
 	if (opt && opt->opt_nflen)
@@ -1889,10 +1900,9 @@ struct sk_buff *__ip6_make_skb(struct sock *sk,
 
 	skb->priority = sk->sk_priority;
 	skb->mark = cork->base.mark;
-
 	skb->tstamp = cork->base.transmit_time;
 
-	skb_dst_set(skb, dst_clone(&rt->dst));
+	ip6_cork_steal_dst(skb, cork);
 	IP6_UPD_PO_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
 	if (proto == IPPROTO_ICMPV6) {
 		struct inet6_dev *idev = ip6_dst_idev(skb_dst(skb));
@@ -1964,26 +1974,26 @@ struct sk_buff *ip6_make_skb(struct sock *sk,
 			     int getfrag(void *from, char *to, int offset,
 					 int len, int odd, struct sk_buff *skb),
 			     void *from, int length, int transhdrlen,
-			     struct ipcm6_cookie *ipc6, struct flowi6 *fl6,
-			     struct rt6_info *rt, unsigned int flags,
-			     struct inet_cork_full *cork)
+			     struct ipcm6_cookie *ipc6, struct rt6_info *rt,
+			     unsigned int flags, struct inet_cork_full *cork)
 {
 	struct inet6_cork v6_cork;
 	struct sk_buff_head queue;
 	int exthdrlen = (ipc6->opt ? ipc6->opt->opt_flen : 0);
 	int err;
 
-	if (flags & MSG_PROBE)
+	if (flags & MSG_PROBE) {
+		dst_release(&rt->dst);
 		return NULL;
+	}
 
 	__skb_queue_head_init(&queue);
 
 	cork->base.flags = 0;
 	cork->base.addr = 0;
 	cork->base.opt = NULL;
-	cork->base.dst = NULL;
 	v6_cork.opt = NULL;
-	err = ip6_setup_cork(sk, cork, &v6_cork, ipc6, rt, fl6);
+	err = ip6_setup_cork(sk, cork, &v6_cork, ipc6, rt);
 	if (err) {
 		ip6_cork_release(cork, &v6_cork);
 		return ERR_PTR(err);
@@ -1991,7 +2001,7 @@ struct sk_buff *ip6_make_skb(struct sock *sk,
 	if (ipc6->dontfrag < 0)
 		ipc6->dontfrag = inet6_sk(sk)->dontfrag;
 
-	err = __ip6_append_data(sk, fl6, &queue, &cork->base, &v6_cork,
+	err = __ip6_append_data(sk, &queue, cork, &v6_cork,
 				&current->task_frag, getfrag, from,
 				length + exthdrlen, transhdrlen + exthdrlen,
 				flags, ipc6);
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 97ade833f58c..53f632a560ec 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -1121,6 +1121,14 @@ int ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev, __u8 dsfield,
 
 			memcpy(&fl6->daddr, addr6, sizeof(fl6->daddr));
 			neigh_release(neigh);
+		} else if (skb->protocol == htons(ETH_P_IP)) {
+			const struct rtable *rt = skb_rtable(skb);
+
+			if (!rt)
+				goto tx_err_link_failure;
+
+			if (rt->rt_gw_family == AF_INET6)
+				memcpy(&fl6->daddr, &rt->rt_gw6, sizeof(fl6->daddr));
 		}
 	} else if (t->parms.proto != 0 && !(t->parms.flags &
 					    (IP6_TNL_F_USE_ORIG_TCLASS |
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 8a2db926b5eb..a9775c830194 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -255,13 +255,12 @@ static void __net_exit ip6mr_rules_exit(struct net *net)
 {
 	struct mr_table *mrt, *next;
 
-	rtnl_lock();
+	ASSERT_RTNL();
 	list_for_each_entry_safe(mrt, next, &net->ipv6.mr6_tables, list) {
 		list_del(&mrt->list);
 		ip6mr_free_table(mrt);
 	}
 	fib_rules_unregister(net->ipv6.mr6_rules_ops);
-	rtnl_unlock();
 }
 
 static int ip6mr_rules_dump(struct net *net, struct notifier_block *nb,
@@ -318,10 +317,9 @@ static int __net_init ip6mr_rules_init(struct net *net)
 
 static void __net_exit ip6mr_rules_exit(struct net *net)
 {
-	rtnl_lock();
+	ASSERT_RTNL();
 	ip6mr_free_table(net->ipv6.mrt6);
 	net->ipv6.mrt6 = NULL;
-	rtnl_unlock();
 }
 
 static int ip6mr_rules_dump(struct net *net, struct notifier_block *nb,
@@ -734,7 +732,7 @@ static int mif6_delete(struct mr_table *mrt, int vifi, int notify,
 
 	in6_dev = __in6_dev_get(dev);
 	if (in6_dev) {
-		in6_dev->cnf.mc_forwarding--;
+		atomic_dec(&in6_dev->cnf.mc_forwarding);
 		inet6_netconf_notify_devconf(dev_net(dev), RTM_NEWNETCONF,
 					     NETCONFA_MC_FORWARDING,
 					     dev->ifindex, &in6_dev->cnf);
@@ -902,7 +900,7 @@ static int mif6_add(struct net *net, struct mr_table *mrt,
 
 	in6_dev = __in6_dev_get(dev);
 	if (in6_dev) {
-		in6_dev->cnf.mc_forwarding++;
+		atomic_inc(&in6_dev->cnf.mc_forwarding);
 		inet6_netconf_notify_devconf(dev_net(dev), RTM_NEWNETCONF,
 					     NETCONFA_MC_FORWARDING,
 					     dev->ifindex, &in6_dev->cnf);
@@ -1042,7 +1040,7 @@ static int ip6mr_cache_report(struct mr_table *mrt, struct sk_buff *pkt,
 	int ret;
 
 #ifdef CONFIG_IPV6_PIMSM_V2
-	if (assert == MRT6MSG_WHOLEPKT)
+	if (assert == MRT6MSG_WHOLEPKT || assert == MRT6MSG_WRMIFWHOLE)
 		skb = skb_realloc_headroom(pkt, -skb_network_offset(pkt)
 						+sizeof(*msg));
 	else
@@ -1058,7 +1056,7 @@ static int ip6mr_cache_report(struct mr_table *mrt, struct sk_buff *pkt,
 	skb->ip_summed = CHECKSUM_UNNECESSARY;
 
 #ifdef CONFIG_IPV6_PIMSM_V2
-	if (assert == MRT6MSG_WHOLEPKT) {
+	if (assert == MRT6MSG_WHOLEPKT || assert == MRT6MSG_WRMIFWHOLE) {
 		/* Ugly, but we have no choice with this interface.
 		   Duplicate old header, fix length etc.
 		   And all this only to mangle msg->im6_msgtype and
@@ -1070,8 +1068,11 @@ static int ip6mr_cache_report(struct mr_table *mrt, struct sk_buff *pkt,
 		skb_reset_transport_header(skb);
 		msg = (struct mrt6msg *)skb_transport_header(skb);
 		msg->im6_mbz = 0;
-		msg->im6_msgtype = MRT6MSG_WHOLEPKT;
-		msg->im6_mif = mrt->mroute_reg_vif_num;
+		msg->im6_msgtype = assert;
+		if (assert == MRT6MSG_WRMIFWHOLE)
+			msg->im6_mif = mifi;
+		else
+			msg->im6_mif = mrt->mroute_reg_vif_num;
 		msg->im6_pad = 0;
 		msg->im6_src = ipv6_hdr(pkt)->saddr;
 		msg->im6_dst = ipv6_hdr(pkt)->daddr;
@@ -1325,7 +1326,9 @@ static int __net_init ip6mr_net_init(struct net *net)
 proc_cache_fail:
 	remove_proc_entry("ip6_mr_vif", net->proc_net);
 proc_vif_fail:
+	rtnl_lock();
 	ip6mr_rules_exit(net);
+	rtnl_unlock();
 #endif
 ip6mr_rules_fail:
 	ip6mr_notifier_exit(net);
@@ -1338,13 +1341,23 @@ static void __net_exit ip6mr_net_exit(struct net *net)
 	remove_proc_entry("ip6_mr_cache", net->proc_net);
 	remove_proc_entry("ip6_mr_vif", net->proc_net);
 #endif
-	ip6mr_rules_exit(net);
 	ip6mr_notifier_exit(net);
 }
 
+static void __net_exit ip6mr_net_exit_batch(struct list_head *net_list)
+{
+	struct net *net;
+
+	rtnl_lock();
+	list_for_each_entry(net, net_list, exit_list)
+		ip6mr_rules_exit(net);
+	rtnl_unlock();
+}
+
 static struct pernet_operations ip6mr_net_ops = {
 	.init = ip6mr_net_init,
 	.exit = ip6mr_net_exit,
+	.exit_batch = ip6mr_net_exit_batch,
 };
 
 int __init ip6_mr_init(void)
@@ -1553,7 +1566,7 @@ static int ip6mr_sk_init(struct mr_table *mrt, struct sock *sk)
 	} else {
 		rcu_assign_pointer(mrt->mroute_sk, sk);
 		sock_set_flag(sk, SOCK_RCU_FREE);
-		net->ipv6.devconf_all->mc_forwarding++;
+		atomic_inc(&net->ipv6.devconf_all->mc_forwarding);
 	}
 	write_unlock_bh(&mrt_lock);
 
@@ -1569,14 +1582,19 @@ static int ip6mr_sk_init(struct mr_table *mrt, struct sock *sk)
 
 int ip6mr_sk_done(struct sock *sk)
 {
-	int err = -EACCES;
 	struct net *net = sock_net(sk);
+	struct ipv6_devconf *devconf;
 	struct mr_table *mrt;
+	int err = -EACCES;
 
 	if (sk->sk_type != SOCK_RAW ||
 	    inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
 		return err;
 
+	devconf = net->ipv6.devconf_all;
+	if (!devconf || !atomic_read(&devconf->mc_forwarding))
+		return err;
+
 	rtnl_lock();
 	ip6mr_for_each_table(mrt, net) {
 		if (sk == rtnl_dereference(mrt->mroute_sk)) {
@@ -1586,7 +1604,7 @@ int ip6mr_sk_done(struct sock *sk)
 			 * so the RCU grace period before sk freeing
 			 * is guaranteed by sk_destruct()
 			 */
-			net->ipv6.devconf_all->mc_forwarding--;
+			atomic_dec(&devconf->mc_forwarding);
 			write_unlock_bh(&mrt_lock);
 			inet6_netconf_notify_devconf(net, RTM_NEWNETCONF,
 						     NETCONFA_MC_FORWARDING,
@@ -1635,6 +1653,7 @@ int ip6_mroute_setsockopt(struct sock *sk, int optname, sockptr_t optval,
 	mifi_t mifi;
 	struct net *net = sock_net(sk);
 	struct mr_table *mrt;
+	bool do_wrmifwhole;
 
 	if (sk->sk_type != SOCK_RAW ||
 	    inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
@@ -1748,12 +1767,15 @@ int ip6_mroute_setsockopt(struct sock *sk, int optname, sockptr_t optval,
 			return -EINVAL;
 		if (copy_from_sockptr(&v, optval, sizeof(v)))
 			return -EFAULT;
+
+		do_wrmifwhole = (v == MRT6MSG_WRMIFWHOLE);
 		v = !!v;
 		rtnl_lock();
 		ret = 0;
 		if (v != mrt->mroute_do_pim) {
 			mrt->mroute_do_pim = v;
 			mrt->mroute_do_assert = v;
+			mrt->mroute_do_wrvifwhole = do_wrmifwhole;
 		}
 		rtnl_unlock();
 		return ret;
@@ -2129,6 +2151,9 @@ static void ip6_mr_forward(struct net *net, struct mr_table *mrt,
 			       MFC_ASSERT_THRESH)) {
 			c->_c.mfc_un.res.last_assert = jiffies;
 			ip6mr_cache_report(mrt, skb, true_vifi, MRT6MSG_WRONGMIF);
+			if (mrt->mroute_do_wrvifwhole)
+				ip6mr_cache_report(mrt, skb, true_vifi,
+						   MRT6MSG_WRMIFWHOLE);
 		}
 		goto dont_forward;
 	}
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index a733803a710c..222f6bf220ba 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -475,7 +475,8 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 				sock_prot_inuse_add(net, sk->sk_prot, -1);
 				sock_prot_inuse_add(net, &tcp_prot, 1);
 
-				sk->sk_prot = &tcp_prot;
+				/* Paired with READ_ONCE(sk->sk_prot) in net/ipv6/af_inet6.c */
+				WRITE_ONCE(sk->sk_prot, &tcp_prot);
 				icsk->icsk_af_ops = &ipv4_specific;
 				sk->sk_socket->ops = &inet_stream_ops;
 				sk->sk_family = PF_INET;
@@ -489,7 +490,8 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 				sock_prot_inuse_add(net, sk->sk_prot, -1);
 				sock_prot_inuse_add(net, prot, 1);
 
-				sk->sk_prot = prot;
+				/* Paired with READ_ONCE(sk->sk_prot) in net/ipv6/af_inet6.c */
+				WRITE_ONCE(sk->sk_prot, prot);
 				sk->sk_socket->ops = &inet_dgram_ops;
 				sk->sk_family = PF_INET;
 			}
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index f03b597e4121..fcb288b0ae13 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -466,9 +466,8 @@ static void ip6_nd_hdr(struct sk_buff *skb,
 	hdr->daddr = *daddr;
 }
 
-static void ndisc_send_skb(struct sk_buff *skb,
-			   const struct in6_addr *daddr,
-			   const struct in6_addr *saddr)
+void ndisc_send_skb(struct sk_buff *skb, const struct in6_addr *daddr,
+		    const struct in6_addr *saddr)
 {
 	struct dst_entry *dst = skb_dst(skb);
 	struct net *net = dev_net(skb->dev);
@@ -515,6 +514,7 @@ static void ndisc_send_skb(struct sk_buff *skb,
 
 	rcu_read_unlock();
 }
+EXPORT_SYMBOL(ndisc_send_skb);
 
 void ndisc_send_na(struct net_device *dev, const struct in6_addr *daddr,
 		   const struct in6_addr *solicited_addr,
@@ -598,22 +598,16 @@ static void ndisc_send_unsol_na(struct net_device *dev)
 	in6_dev_put(idev);
 }
 
-void ndisc_send_ns(struct net_device *dev, const struct in6_addr *solicit,
-		   const struct in6_addr *daddr, const struct in6_addr *saddr,
-		   u64 nonce)
+struct sk_buff *ndisc_ns_create(struct net_device *dev, const struct in6_addr *solicit,
+				const struct in6_addr *saddr, u64 nonce)
 {
-	struct sk_buff *skb;
-	struct in6_addr addr_buf;
 	int inc_opt = dev->addr_len;
-	int optlen = 0;
+	struct sk_buff *skb;
 	struct nd_msg *msg;
+	int optlen = 0;
 
-	if (!saddr) {
-		if (ipv6_get_lladdr(dev, &addr_buf,
-				   (IFA_F_TENTATIVE|IFA_F_OPTIMISTIC)))
-			return;
-		saddr = &addr_buf;
-	}
+	if (!saddr)
+		return NULL;
 
 	if (ipv6_addr_any(saddr))
 		inc_opt = false;
@@ -625,7 +619,7 @@ void ndisc_send_ns(struct net_device *dev, const struct in6_addr *solicit,
 
 	skb = ndisc_alloc_skb(dev, sizeof(*msg) + optlen);
 	if (!skb)
-		return;
+		return NULL;
 
 	msg = skb_put(skb, sizeof(*msg));
 	*msg = (struct nd_msg) {
@@ -647,7 +641,28 @@ void ndisc_send_ns(struct net_device *dev, const struct in6_addr *solicit,
 		memcpy(opt + 2, &nonce, 6);
 	}
 
-	ndisc_send_skb(skb, daddr, saddr);
+	return skb;
+}
+EXPORT_SYMBOL(ndisc_ns_create);
+
+void ndisc_send_ns(struct net_device *dev, const struct in6_addr *solicit,
+		   const struct in6_addr *daddr, const struct in6_addr *saddr,
+		   u64 nonce)
+{
+	struct in6_addr addr_buf;
+	struct sk_buff *skb;
+
+	if (!saddr) {
+		if (ipv6_get_lladdr(dev, &addr_buf,
+				    (IFA_F_TENTATIVE | IFA_F_OPTIMISTIC)))
+			return;
+		saddr = &addr_buf;
+	}
+
+	skb = ndisc_ns_create(dev, solicit, saddr, nonce);
+
+	if (skb)
+		ndisc_send_skb(skb, daddr, saddr);
 }
 
 void ndisc_send_rs(struct net_device *dev, const struct in6_addr *saddr,
@@ -1337,8 +1352,12 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 			return;
 		}
 		neigh->flags |= NTF_ROUTER;
-	} else if (rt) {
+	} else if (rt && IPV6_EXTRACT_PREF(rt->fib6_flags) != pref) {
+		struct nl_info nlinfo = {
+			.nl_net = net,
+		};
 		rt->fib6_flags = (rt->fib6_flags & ~RTF_PREF_MASK) | RTF_PREF(pref);
+		inet6_rt_notify(RTM_NEWROUTE, rt, &nlinfo, NLM_F_REPLACE);
 	}
 
 	if (rt)
diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c
index 6ab710b5a1a8..1da332450d98 100644
--- a/net/ipv6/netfilter.c
+++ b/net/ipv6/netfilter.c
@@ -121,6 +121,7 @@ int br_ip6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
 				  struct sk_buff *))
 {
 	int frag_max_size = BR_INPUT_SKB_CB(skb)->frag_max_size;
+	bool mono_delivery_time = skb->mono_delivery_time;
 	ktime_t tstamp = skb->tstamp;
 	struct ip6_frag_state state;
 	u8 *prevhdr, nexthdr = 0;
@@ -186,7 +187,7 @@ int br_ip6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
 			if (iter.frag)
 				ip6_fraglist_prepare(skb, &iter);
 
-			skb->tstamp = tstamp;
+			skb_set_delivery_time(skb, tstamp, mono_delivery_time);
 			err = output(net, sk, data, skb);
 			if (err || !iter.frag)
 				break;
@@ -219,7 +220,7 @@ slow_path:
 			goto blackhole;
 		}
 
-		skb2->tstamp = tstamp;
+		skb_set_delivery_time(skb2, tstamp, mono_delivery_time);
 		err = output(net, sk, data, skb2);
 		if (err)
 			goto blackhole;
diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index 5c47be29b9ee..7dd3629dd19e 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -264,6 +264,7 @@ static int nf_ct_frag6_queue(struct frag_queue *fq, struct sk_buff *skb,
 		fq->iif = dev->ifindex;
 
 	fq->q.stamp = skb->tstamp;
+	fq->q.mono_delivery_time = skb->mono_delivery_time;
 	fq->q.meat += skb->len;
 	fq->ecn |= ecn;
 	if (payload_len > fq->q.max_size)
diff --git a/net/ipv6/netfilter/nft_dup_ipv6.c b/net/ipv6/netfilter/nft_dup_ipv6.c
index 3a00d95e964e..70a405b4006f 100644
--- a/net/ipv6/netfilter/nft_dup_ipv6.c
+++ b/net/ipv6/netfilter/nft_dup_ipv6.c
@@ -73,6 +73,7 @@ static const struct nft_expr_ops nft_dup_ipv6_ops = {
 	.eval		= nft_dup_ipv6_eval,
 	.init		= nft_dup_ipv6_init,
 	.dump		= nft_dup_ipv6_dump,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static const struct nla_policy nft_dup_ipv6_policy[NFTA_DUP_MAX + 1] = {
diff --git a/net/ipv6/netfilter/nft_fib_ipv6.c b/net/ipv6/netfilter/nft_fib_ipv6.c
index 92f3235fa287..b3f163b40c2b 100644
--- a/net/ipv6/netfilter/nft_fib_ipv6.c
+++ b/net/ipv6/netfilter/nft_fib_ipv6.c
@@ -211,6 +211,7 @@ static const struct nft_expr_ops nft_fib6_type_ops = {
 	.init		= nft_fib_init,
 	.dump		= nft_fib_dump,
 	.validate	= nft_fib_validate,
+	.reduce		= nft_fib_reduce,
 };
 
 static const struct nft_expr_ops nft_fib6_ops = {
@@ -220,6 +221,7 @@ static const struct nft_expr_ops nft_fib6_ops = {
 	.init		= nft_fib_init,
 	.dump		= nft_fib_dump,
 	.validate	= nft_fib_validate,
+	.reduce		= nft_fib_reduce,
 };
 
 static const struct nft_expr_ops *
diff --git a/net/ipv6/netfilter/nft_reject_ipv6.c b/net/ipv6/netfilter/nft_reject_ipv6.c
index ed69c768797e..5c61294f410e 100644
--- a/net/ipv6/netfilter/nft_reject_ipv6.c
+++ b/net/ipv6/netfilter/nft_reject_ipv6.c
@@ -46,6 +46,7 @@ static const struct nft_expr_ops nft_reject_ipv6_ops = {
 	.init		= nft_reject_init,
 	.dump		= nft_reject_dump,
 	.validate	= nft_reject_validate,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static struct nft_expr_type nft_reject_ipv6_type __read_mostly = {
diff --git a/net/ipv6/ping.c b/net/ipv6/ping.c
index 9256f6ba87ef..ff033d16549e 100644
--- a/net/ipv6/ping.c
+++ b/net/ipv6/ping.c
@@ -59,8 +59,6 @@ static int ping_v6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
 	struct pingfakehdr pfh;
 	struct ipcm6_cookie ipc6;
 
-	pr_debug("ping_v6_sendmsg(sk=%p,sk->num=%u)\n", inet, inet->inet_num);
-
 	err = ping_common_sendmsg(AF_INET6, msg, len, &user_icmph,
 				  sizeof(user_icmph));
 	if (err)
@@ -99,7 +97,25 @@ static int ping_v6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
 	    (oif && sk->sk_bound_dev_if && oif != sk->sk_bound_dev_if))
 		return -EINVAL;
 
-	/* TODO: use ip6_datagram_send_ctl to get options from cmsg */
+	ipcm6_init_sk(&ipc6, np);
+	ipc6.sockc.tsflags = sk->sk_tsflags;
+	ipc6.sockc.mark = sk->sk_mark;
+
+	if (msg->msg_controllen) {
+		struct ipv6_txoptions opt = {};
+
+		opt.tot_len = sizeof(opt);
+		ipc6.opt = &opt;
+
+		err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, &ipc6);
+		if (err < 0)
+			return err;
+
+		/* Changes to txoptions and flow info are not implemented, yet.
+		 * Drop the options, fl6 is wiped below.
+		 */
+		ipc6.opt = NULL;
+	}
 
 	memset(&fl6, 0, sizeof(fl6));
 
@@ -107,14 +123,12 @@ static int ping_v6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
 	fl6.saddr = np->saddr;
 	fl6.daddr = *daddr;
 	fl6.flowi6_oif = oif;
-	fl6.flowi6_mark = sk->sk_mark;
+	fl6.flowi6_mark = ipc6.sockc.mark;
 	fl6.flowi6_uid = sk->sk_uid;
 	fl6.fl6_icmp_type = user_icmph.icmp6_type;
 	fl6.fl6_icmp_code = user_icmph.icmp6_code;
 	security_sk_classify_flow(sk, flowi6_to_flowi_common(&fl6));
 
-	ipcm6_init_sk(&ipc6, np);
-	ipc6.sockc.mark = sk->sk_mark;
 	fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel);
 
 	dst = ip6_sk_dst_lookup_flow(sk, &fl6, daddr, false);
@@ -136,7 +150,8 @@ static int ping_v6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
 	pfh.wcheck = 0;
 	pfh.family = AF_INET6;
 
-	ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
+	if (ipc6.hlimit < 0)
+		ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
 
 	lock_sock(sk);
 	err = ip6_append_data(sk, ping_getfrag, &pfh, len,
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index 28e44782c94d..ff866f2a879e 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -194,6 +194,7 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
 		fq->iif = dev->ifindex;
 
 	fq->q.stamp = skb->tstamp;
+	fq->q.mono_delivery_time = skb->mono_delivery_time;
 	fq->q.meat += skb->len;
 	fq->ecn |= ecn;
 	add_frag_mem_limit(fq->q.fqdir, skb->truesize);
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index ea1cf414a92e..2fa10e60cccd 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -130,6 +130,7 @@ static struct fib6_info *rt6_get_route_info(struct net *net,
 struct uncached_list {
 	spinlock_t		lock;
 	struct list_head	head;
+	struct list_head	quarantine;
 };
 
 static DEFINE_PER_CPU_ALIGNED(struct uncached_list, rt6_uncached_list);
@@ -149,35 +150,34 @@ void rt6_uncached_list_del(struct rt6_info *rt)
 {
 	if (!list_empty(&rt->rt6i_uncached)) {
 		struct uncached_list *ul = rt->rt6i_uncached_list;
-		struct net *net = dev_net(rt->dst.dev);
 
 		spin_lock_bh(&ul->lock);
-		list_del(&rt->rt6i_uncached);
-		atomic_dec(&net->ipv6.rt6_stats->fib_rt_uncache);
+		list_del_init(&rt->rt6i_uncached);
 		spin_unlock_bh(&ul->lock);
 	}
 }
 
-static void rt6_uncached_list_flush_dev(struct net *net, struct net_device *dev)
+static void rt6_uncached_list_flush_dev(struct net_device *dev)
 {
-	struct net_device *loopback_dev = net->loopback_dev;
 	int cpu;
 
-	if (dev == loopback_dev)
-		return;
-
 	for_each_possible_cpu(cpu) {
 		struct uncached_list *ul = per_cpu_ptr(&rt6_uncached_list, cpu);
-		struct rt6_info *rt;
+		struct rt6_info *rt, *safe;
+
+		if (list_empty(&ul->head))
+			continue;
 
 		spin_lock_bh(&ul->lock);
-		list_for_each_entry(rt, &ul->head, rt6i_uncached) {
+		list_for_each_entry_safe(rt, safe, &ul->head, rt6i_uncached) {
 			struct inet6_dev *rt_idev = rt->rt6i_idev;
 			struct net_device *rt_dev = rt->dst.dev;
+			bool handled = false;
 
 			if (rt_idev->dev == dev) {
-				rt->rt6i_idev = in6_dev_get(loopback_dev);
+				rt->rt6i_idev = in6_dev_get(blackhole_netdev);
 				in6_dev_put(rt_idev);
+				handled = true;
 			}
 
 			if (rt_dev == dev) {
@@ -185,7 +185,11 @@ static void rt6_uncached_list_flush_dev(struct net *net, struct net_device *dev)
 				dev_replace_track(rt_dev, blackhole_netdev,
 						  &rt->dst.dev_tracker,
 						  GFP_ATOMIC);
+				handled = true;
 			}
+			if (handled)
+				list_move(&rt->rt6i_uncached,
+					  &ul->quarantine);
 		}
 		spin_unlock_bh(&ul->lock);
 	}
@@ -373,13 +377,12 @@ static void ip6_dst_ifdown(struct dst_entry *dst, struct net_device *dev,
 {
 	struct rt6_info *rt = (struct rt6_info *)dst;
 	struct inet6_dev *idev = rt->rt6i_idev;
-	struct net_device *loopback_dev =
-		dev_net(dev)->loopback_dev;
 
-	if (idev && idev->dev != loopback_dev) {
-		struct inet6_dev *loopback_idev = in6_dev_get(loopback_dev);
-		if (loopback_idev) {
-			rt->rt6i_idev = loopback_idev;
+	if (idev && idev->dev != blackhole_netdev) {
+		struct inet6_dev *blackhole_idev = in6_dev_get(blackhole_netdev);
+
+		if (blackhole_idev) {
+			rt->rt6i_idev = blackhole_idev;
 			in6_dev_put(idev);
 		}
 	}
@@ -1206,9 +1209,6 @@ INDIRECT_CALLABLE_SCOPE struct rt6_info *ip6_pol_route_lookup(struct net *net,
 	struct fib6_node *fn;
 	struct rt6_info *rt;
 
-	if (fl6->flowi6_flags & FLOWI_FLAG_SKIP_NH_OIF)
-		flags &= ~RT6_LOOKUP_F_IFACE;
-
 	rcu_read_lock();
 	fn = fib6_node_lookup(&table->tb6_root, &fl6->daddr, &fl6->saddr);
 restart:
@@ -2178,9 +2178,6 @@ int fib6_table_lookup(struct net *net, struct fib6_table *table, int oif,
 	fn = fib6_node_lookup(&table->tb6_root, &fl6->daddr, &fl6->saddr);
 	saved_fn = fn;
 
-	if (fl6->flowi6_flags & FLOWI_FLAG_SKIP_NH_OIF)
-		oif = 0;
-
 redo_rt6_select:
 	rt6_select(net, fn, oif, res, strict);
 	if (res->f6i == net->ipv6.fib6_null_entry) {
@@ -2244,7 +2241,6 @@ struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table,
 			 * if caller sets RT6_LOOKUP_F_DST_NOREF flag.
 			 */
 			rt6_uncached_list_add(rt);
-			atomic_inc(&net->ipv6.rt6_stats->fib_rt_uncache);
 			rcu_read_unlock();
 
 			return rt;
@@ -3056,12 +3052,6 @@ INDIRECT_CALLABLE_SCOPE struct rt6_info *__ip6_route_redirect(struct net *net,
 	struct fib6_info *rt;
 	struct fib6_node *fn;
 
-	/* l3mdev_update_flow overrides oif if the device is enslaved; in
-	 * this case we must match on the real ingress device, so reset it
-	 */
-	if (fl6->flowi6_flags & FLOWI_FLAG_SKIP_NH_OIF)
-		fl6->flowi6_oif = skb->dev->ifindex;
-
 	/* Get the "current" route for this destination and
 	 * check if the redirect has come from appropriate router.
 	 *
@@ -3287,7 +3277,6 @@ struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
 	 * do proper release of the net_device
 	 */
 	rt6_uncached_list_add(rt);
-	atomic_inc(&net->ipv6.rt6_stats->fib_rt_uncache);
 
 	dst = xfrm_lookup(net, &rt->dst, flowi6_to_flowi(fl6), NULL, 0);
 
@@ -4896,7 +4885,7 @@ void rt6_sync_down_dev(struct net_device *dev, unsigned long event)
 void rt6_disable_ip(struct net_device *dev, unsigned long event)
 {
 	rt6_sync_down_dev(dev, event);
-	rt6_uncached_list_flush_dev(dev_net(dev), dev);
+	rt6_uncached_list_flush_dev(dev);
 	neigh_ifdown(&nd_tbl, dev);
 }
 
@@ -5009,6 +4998,12 @@ static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh,
 	err = -EINVAL;
 	rtm = nlmsg_data(nlh);
 
+	if (rtm->rtm_tos) {
+		NL_SET_ERR_MSG(extack,
+			       "Invalid dsfield (tos): option not available for IPv6");
+		goto errout;
+	}
+
 	*cfg = (struct fib6_config){
 		.fc_table = rtm->rtm_table,
 		.fc_dst_len = rtm->rtm_dst_len,
@@ -6731,6 +6726,7 @@ int __init ip6_route_init(void)
 		struct uncached_list *ul = per_cpu_ptr(&rt6_uncached_list, cpu);
 
 		INIT_LIST_HEAD(&ul->head);
+		INIT_LIST_HEAD(&ul->quarantine);
 		spin_lock_init(&ul->lock);
 	}
 
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 075ee8a2df3b..13678d3908fa 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -148,6 +148,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
 	struct sockaddr_in6 *usin = (struct sockaddr_in6 *) uaddr;
 	struct inet_sock *inet = inet_sk(sk);
 	struct inet_connection_sock *icsk = inet_csk(sk);
+	struct inet_timewait_death_row *tcp_death_row;
 	struct ipv6_pinfo *np = tcp_inet6_sk(sk);
 	struct tcp_sock *tp = tcp_sk(sk);
 	struct in6_addr *saddr = NULL, *final_p, final;
@@ -156,7 +157,6 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
 	struct dst_entry *dst;
 	int addr_type;
 	int err;
-	struct inet_timewait_death_row *tcp_death_row = &sock_net(sk)->ipv4.tcp_death_row;
 
 	if (addr_len < SIN6_LEN_RFC2133)
 		return -EINVAL;
@@ -308,6 +308,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
 	inet->inet_dport = usin->sin6_port;
 
 	tcp_set_state(sk, TCP_SYN_SENT);
+	tcp_death_row = sock_net(sk)->ipv4.tcp_death_row;
 	err = inet6_hash_connect(tcp_death_row, sk);
 	if (err)
 		goto late_failure;
@@ -772,57 +773,6 @@ clear_hash_noput:
 
 #endif
 
-static bool tcp_v6_inbound_md5_hash(const struct sock *sk,
-				    const struct sk_buff *skb,
-				    int dif, int sdif)
-{
-#ifdef CONFIG_TCP_MD5SIG
-	const __u8 *hash_location = NULL;
-	struct tcp_md5sig_key *hash_expected;
-	const struct ipv6hdr *ip6h = ipv6_hdr(skb);
-	const struct tcphdr *th = tcp_hdr(skb);
-	int genhash, l3index;
-	u8 newhash[16];
-
-	/* sdif set, means packet ingressed via a device
-	 * in an L3 domain and dif is set to the l3mdev
-	 */
-	l3index = sdif ? dif : 0;
-
-	hash_expected = tcp_v6_md5_do_lookup(sk, &ip6h->saddr, l3index);
-	hash_location = tcp_parse_md5sig_option(th);
-
-	/* We've parsed the options - do we have a hash? */
-	if (!hash_expected && !hash_location)
-		return false;
-
-	if (hash_expected && !hash_location) {
-		NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMD5NOTFOUND);
-		return true;
-	}
-
-	if (!hash_expected && hash_location) {
-		NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMD5UNEXPECTED);
-		return true;
-	}
-
-	/* check the signature */
-	genhash = tcp_v6_md5_hash_skb(newhash,
-				      hash_expected,
-				      NULL, skb);
-
-	if (genhash || memcmp(hash_location, newhash, 16) != 0) {
-		NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMD5FAILURE);
-		net_info_ratelimited("MD5 Hash %s for [%pI6c]:%u->[%pI6c]:%u L3 index %d\n",
-				     genhash ? "failed" : "mismatch",
-				     &ip6h->saddr, ntohs(th->source),
-				     &ip6h->daddr, ntohs(th->dest), l3index);
-		return true;
-	}
-#endif
-	return false;
-}
-
 static void tcp_v6_init_req(struct request_sock *req,
 			    const struct sock *sk_listener,
 			    struct sk_buff *skb)
@@ -920,12 +870,11 @@ static void tcp_v6_send_response(const struct sock *sk, struct sk_buff *skb, u32
 	}
 #endif
 
-	buff = alloc_skb(MAX_HEADER + sizeof(struct ipv6hdr) + tot_len,
-			 GFP_ATOMIC);
+	buff = alloc_skb(MAX_TCP_HEADER, GFP_ATOMIC);
 	if (!buff)
 		return;
 
-	skb_reserve(buff, MAX_HEADER + sizeof(struct ipv6hdr) + tot_len);
+	skb_reserve(buff, MAX_TCP_HEADER);
 
 	t1 = skb_push(buff, tot_len);
 	skb_reset_transport_header(buff);
@@ -991,7 +940,7 @@ static void tcp_v6_send_response(const struct sock *sk, struct sk_buff *skb, u32
 		} else {
 			mark = sk->sk_mark;
 		}
-		buff->tstamp = tcp_transmit_time(sk);
+		skb_set_delivery_time(buff, tcp_transmit_time(sk), true);
 	}
 	fl6.flowi6_mark = IP6_REPLY_MARK(net, skb->mark) ?: mark;
 	fl6.fl6_dport = t1->dest;
@@ -1471,6 +1420,7 @@ int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
 {
 	struct ipv6_pinfo *np = tcp_inet6_sk(sk);
 	struct sk_buff *opt_skb = NULL;
+	enum skb_drop_reason reason;
 	struct tcp_sock *tp;
 
 	/* Imagine: socket is IPv6. IPv4 packet arrives,
@@ -1505,6 +1455,7 @@ int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
 	if (np->rxopt.all)
 		opt_skb = skb_clone(skb, sk_gfp_mask(sk, GFP_ATOMIC));
 
+	reason = SKB_DROP_REASON_NOT_SPECIFIED;
 	if (sk->sk_state == TCP_ESTABLISHED) { /* Fast path */
 		struct dst_entry *dst;
 
@@ -1558,9 +1509,10 @@ reset:
 discard:
 	if (opt_skb)
 		__kfree_skb(opt_skb);
-	kfree_skb(skb);
+	kfree_skb_reason(skb, reason);
 	return 0;
 csum_err:
+	reason = SKB_DROP_REASON_TCP_CSUM;
 	trace_tcp_bad_csum(skb);
 	TCP_INC_STATS(sock_net(sk), TCP_MIB_CSUMERRORS);
 	TCP_INC_STATS(sock_net(sk), TCP_MIB_INERRS);
@@ -1626,6 +1578,7 @@ static void tcp_v6_fill_cb(struct sk_buff *skb, const struct ipv6hdr *hdr,
 
 INDIRECT_CALLABLE_SCOPE int tcp_v6_rcv(struct sk_buff *skb)
 {
+	enum skb_drop_reason drop_reason;
 	int sdif = inet6_sdif(skb);
 	int dif = inet6_iif(skb);
 	const struct tcphdr *th;
@@ -1635,6 +1588,7 @@ INDIRECT_CALLABLE_SCOPE int tcp_v6_rcv(struct sk_buff *skb)
 	int ret;
 	struct net *net = dev_net(skb->dev);
 
+	drop_reason = SKB_DROP_REASON_NOT_SPECIFIED;
 	if (skb->pkt_type != PACKET_HOST)
 		goto discard_it;
 
@@ -1648,8 +1602,10 @@ INDIRECT_CALLABLE_SCOPE int tcp_v6_rcv(struct sk_buff *skb)
 
 	th = (const struct tcphdr *)skb->data;
 
-	if (unlikely(th->doff < sizeof(struct tcphdr)/4))
+	if (unlikely(th->doff < sizeof(struct tcphdr) / 4)) {
+		drop_reason = SKB_DROP_REASON_PKT_TOO_SMALL;
 		goto bad_packet;
+	}
 	if (!pskb_may_pull(skb, th->doff*4))
 		goto discard_it;
 
@@ -1676,7 +1632,10 @@ process:
 		struct sock *nsk;
 
 		sk = req->rsk_listener;
-		if (tcp_v6_inbound_md5_hash(sk, skb, dif, sdif)) {
+		drop_reason = tcp_inbound_md5_hash(sk, skb,
+						   &hdr->saddr, &hdr->daddr,
+						   AF_INET6, dif, sdif);
+		if (drop_reason) {
 			sk_drops_add(sk, skb);
 			reqsk_put(req);
 			goto discard_it;
@@ -1705,6 +1664,8 @@ process:
 			hdr = ipv6_hdr(skb);
 			tcp_v6_fill_cb(skb, hdr, th);
 			nsk = tcp_check_req(sk, skb, req, false, &req_stolen);
+		} else {
+			drop_reason = SKB_DROP_REASON_SOCKET_FILTER;
 		}
 		if (!nsk) {
 			reqsk_put(req);
@@ -1740,14 +1701,20 @@ process:
 		}
 	}
 
-	if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
+	if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
+		drop_reason = SKB_DROP_REASON_XFRM_POLICY;
 		goto discard_and_relse;
+	}
 
-	if (tcp_v6_inbound_md5_hash(sk, skb, dif, sdif))
+	drop_reason = tcp_inbound_md5_hash(sk, skb, &hdr->saddr, &hdr->daddr,
+					   AF_INET6, dif, sdif);
+	if (drop_reason)
 		goto discard_and_relse;
 
-	if (tcp_filter(sk, skb))
+	if (tcp_filter(sk, skb)) {
+		drop_reason = SKB_DROP_REASON_SOCKET_FILTER;
 		goto discard_and_relse;
+	}
 	th = (const struct tcphdr *)skb->data;
 	hdr = ipv6_hdr(skb);
 	tcp_v6_fill_cb(skb, hdr, th);
@@ -1768,7 +1735,7 @@ process:
 	if (!sock_owned_by_user(sk)) {
 		ret = tcp_v6_do_rcv(sk, skb);
 	} else {
-		if (tcp_add_backlog(sk, skb))
+		if (tcp_add_backlog(sk, skb, &drop_reason))
 			goto discard_and_relse;
 	}
 	bh_unlock_sock(sk);
@@ -1778,6 +1745,7 @@ put_and_return:
 	return ret ? -1 : 0;
 
 no_tcp_socket:
+	drop_reason = SKB_DROP_REASON_NO_SOCKET;
 	if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
 		goto discard_it;
 
@@ -1785,6 +1753,7 @@ no_tcp_socket:
 
 	if (tcp_checksum_complete(skb)) {
 csum_error:
+		drop_reason = SKB_DROP_REASON_TCP_CSUM;
 		trace_tcp_bad_csum(skb);
 		__TCP_INC_STATS(net, TCP_MIB_CSUMERRORS);
 bad_packet:
@@ -1794,7 +1763,7 @@ bad_packet:
 	}
 
 discard_it:
-	kfree_skb(skb);
+	kfree_skb_reason(skb, drop_reason);
 	return 0;
 
 discard_and_relse:
@@ -1805,6 +1774,7 @@ discard_and_relse:
 
 do_time_wait:
 	if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) {
+		drop_reason = SKB_DROP_REASON_XFRM_POLICY;
 		inet_twsk_put(inet_twsk(sk));
 		goto discard_it;
 	}
@@ -2237,15 +2207,9 @@ static void __net_exit tcpv6_net_exit(struct net *net)
 	inet_ctl_sock_destroy(net->ipv6.tcp_sk);
 }
 
-static void __net_exit tcpv6_net_exit_batch(struct list_head *net_exit_list)
-{
-	inet_twsk_purge(&tcp_hashinfo, AF_INET6);
-}
-
 static struct pernet_operations tcpv6_net_ops = {
 	.init	    = tcpv6_net_init,
 	.exit	    = tcpv6_net_exit,
-	.exit_batch = tcpv6_net_exit_batch,
 };
 
 int __init tcpv6_init(void)
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 528b81ef19c9..7f0fa9bd9ffe 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -912,6 +912,7 @@ static int udp6_unicast_rcv_skb(struct sock *sk, struct sk_buff *skb,
 int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
 		   int proto)
 {
+	enum skb_drop_reason reason = SKB_DROP_REASON_NOT_SPECIFIED;
 	const struct in6_addr *saddr, *daddr;
 	struct net *net = dev_net(skb->dev);
 	struct udphdr *uh;
@@ -988,6 +989,8 @@ int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
 		return udp6_unicast_rcv_skb(sk, skb, uh);
 	}
 
+	reason = SKB_DROP_REASON_NO_SOCKET;
+
 	if (!uh->check)
 		goto report_csum_error;
 
@@ -1000,10 +1003,12 @@ int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
 	__UDP6_INC_STATS(net, UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE);
 	icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0);
 
-	kfree_skb(skb);
+	kfree_skb_reason(skb, reason);
 	return 0;
 
 short_packet:
+	if (reason == SKB_DROP_REASON_NOT_SPECIFIED)
+		reason = SKB_DROP_REASON_PKT_TOO_SMALL;
 	net_dbg_ratelimited("UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n",
 			    proto == IPPROTO_UDPLITE ? "-Lite" : "",
 			    saddr, ntohs(uh->source),
@@ -1014,10 +1019,12 @@ short_packet:
 report_csum_error:
 	udp6_csum_zero_error(skb);
 csum_error:
+	if (reason == SKB_DROP_REASON_NOT_SPECIFIED)
+		reason = SKB_DROP_REASON_UDP_CSUM;
 	__UDP6_INC_STATS(net, UDP_MIB_CSUMERRORS, proto == IPPROTO_UDPLITE);
 discard:
 	__UDP6_INC_STATS(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE);
-	kfree_skb(skb);
+	kfree_skb_reason(skb, reason);
 	return 0;
 }
 
@@ -1266,23 +1273,17 @@ static int udp_v6_push_pending_frames(struct sock *sk)
 {
 	struct sk_buff *skb;
 	struct udp_sock  *up = udp_sk(sk);
-	struct flowi6 fl6;
 	int err = 0;
 
 	if (up->pending == AF_INET)
 		return udp_push_pending_frames(sk);
 
-	/* ip6_finish_skb will release the cork, so make a copy of
-	 * fl6 here.
-	 */
-	fl6 = inet_sk(sk)->cork.fl.u.ip6;
-
 	skb = ip6_finish_skb(sk);
 	if (!skb)
 		goto out;
 
-	err = udp_v6_send_skb(skb, &fl6, &inet_sk(sk)->cork.base);
-
+	err = udp_v6_send_skb(skb, &inet_sk(sk)->cork.fl.u.ip6,
+			      &inet_sk(sk)->cork.base);
 out:
 	up->len = 0;
 	up->pending = 0;
@@ -1300,7 +1301,8 @@ int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
 	struct ipv6_txoptions *opt = NULL;
 	struct ipv6_txoptions *opt_to_free = NULL;
 	struct ip6_flowlabel *flowlabel = NULL;
-	struct flowi6 fl6;
+	struct inet_cork_full cork;
+	struct flowi6 *fl6 = &cork.fl.u.ip6;
 	struct dst_entry *dst;
 	struct ipcm6_cookie ipc6;
 	int addr_len = msg->msg_namelen;
@@ -1363,9 +1365,6 @@ do_udp_sendmsg:
 		}
 	}
 
-	if (up->pending == AF_INET)
-		return udp_sendmsg(sk, msg, len);
-
 	/* Rough check on arithmetic overflow,
 	   better check is made in ip6_append_data().
 	   */
@@ -1374,6 +1373,8 @@ do_udp_sendmsg:
 
 	getfrag  =  is_udplite ?  udplite_getfrag : ip_generic_getfrag;
 	if (up->pending) {
+		if (up->pending == AF_INET)
+			return udp_sendmsg(sk, msg, len);
 		/*
 		 * There are pending frames.
 		 * The socket lock must be held while it's corked.
@@ -1391,19 +1392,19 @@ do_udp_sendmsg:
 	}
 	ulen += sizeof(struct udphdr);
 
-	memset(&fl6, 0, sizeof(fl6));
+	memset(fl6, 0, sizeof(*fl6));
 
 	if (sin6) {
 		if (sin6->sin6_port == 0)
 			return -EINVAL;
 
-		fl6.fl6_dport = sin6->sin6_port;
+		fl6->fl6_dport = sin6->sin6_port;
 		daddr = &sin6->sin6_addr;
 
 		if (np->sndflow) {
-			fl6.flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
-			if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) {
-				flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
+			fl6->flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK;
+			if (fl6->flowlabel & IPV6_FLOWLABEL_MASK) {
+				flowlabel = fl6_sock_lookup(sk, fl6->flowlabel);
 				if (IS_ERR(flowlabel))
 					return -EINVAL;
 			}
@@ -1420,24 +1421,24 @@ do_udp_sendmsg:
 		if (addr_len >= sizeof(struct sockaddr_in6) &&
 		    sin6->sin6_scope_id &&
 		    __ipv6_addr_needs_scope_id(__ipv6_addr_type(daddr)))
-			fl6.flowi6_oif = sin6->sin6_scope_id;
+			fl6->flowi6_oif = sin6->sin6_scope_id;
 	} else {
 		if (sk->sk_state != TCP_ESTABLISHED)
 			return -EDESTADDRREQ;
 
-		fl6.fl6_dport = inet->inet_dport;
+		fl6->fl6_dport = inet->inet_dport;
 		daddr = &sk->sk_v6_daddr;
-		fl6.flowlabel = np->flow_label;
+		fl6->flowlabel = np->flow_label;
 		connected = true;
 	}
 
-	if (!fl6.flowi6_oif)
-		fl6.flowi6_oif = sk->sk_bound_dev_if;
+	if (!fl6->flowi6_oif)
+		fl6->flowi6_oif = sk->sk_bound_dev_if;
 
-	if (!fl6.flowi6_oif)
-		fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex;
+	if (!fl6->flowi6_oif)
+		fl6->flowi6_oif = np->sticky_pktinfo.ipi6_ifindex;
 
-	fl6.flowi6_uid = sk->sk_uid;
+	fl6->flowi6_uid = sk->sk_uid;
 
 	if (msg->msg_controllen) {
 		opt = &opt_space;
@@ -1447,14 +1448,14 @@ do_udp_sendmsg:
 
 		err = udp_cmsg_send(sk, msg, &ipc6.gso_size);
 		if (err > 0)
-			err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6,
+			err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, fl6,
 						    &ipc6);
 		if (err < 0) {
 			fl6_sock_release(flowlabel);
 			return err;
 		}
-		if ((fl6.flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
-			flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
+		if ((fl6->flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) {
+			flowlabel = fl6_sock_lookup(sk, fl6->flowlabel);
 			if (IS_ERR(flowlabel))
 				return -EINVAL;
 		}
@@ -1471,16 +1472,17 @@ do_udp_sendmsg:
 	opt = ipv6_fixup_options(&opt_space, opt);
 	ipc6.opt = opt;
 
-	fl6.flowi6_proto = sk->sk_protocol;
-	fl6.flowi6_mark = ipc6.sockc.mark;
-	fl6.daddr = *daddr;
-	if (ipv6_addr_any(&fl6.saddr) && !ipv6_addr_any(&np->saddr))
-		fl6.saddr = np->saddr;
-	fl6.fl6_sport = inet->inet_sport;
+	fl6->flowi6_proto = sk->sk_protocol;
+	fl6->flowi6_mark = ipc6.sockc.mark;
+	fl6->daddr = *daddr;
+	if (ipv6_addr_any(&fl6->saddr) && !ipv6_addr_any(&np->saddr))
+		fl6->saddr = np->saddr;
+	fl6->fl6_sport = inet->inet_sport;
 
 	if (cgroup_bpf_enabled(CGROUP_UDP6_SENDMSG) && !connected) {
 		err = BPF_CGROUP_RUN_PROG_UDP6_SENDMSG_LOCK(sk,
-					   (struct sockaddr *)sin6, &fl6.saddr);
+					   (struct sockaddr *)sin6,
+					   &fl6->saddr);
 		if (err)
 			goto out_no_dst;
 		if (sin6) {
@@ -1496,32 +1498,32 @@ do_udp_sendmsg:
 				err = -EINVAL;
 				goto out_no_dst;
 			}
-			fl6.fl6_dport = sin6->sin6_port;
-			fl6.daddr = sin6->sin6_addr;
+			fl6->fl6_dport = sin6->sin6_port;
+			fl6->daddr = sin6->sin6_addr;
 		}
 	}
 
-	if (ipv6_addr_any(&fl6.daddr))
-		fl6.daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
+	if (ipv6_addr_any(&fl6->daddr))
+		fl6->daddr.s6_addr[15] = 0x1; /* :: means loopback (BSD'ism) */
 
-	final_p = fl6_update_dst(&fl6, opt, &final);
+	final_p = fl6_update_dst(fl6, opt, &final);
 	if (final_p)
 		connected = false;
 
-	if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) {
-		fl6.flowi6_oif = np->mcast_oif;
+	if (!fl6->flowi6_oif && ipv6_addr_is_multicast(&fl6->daddr)) {
+		fl6->flowi6_oif = np->mcast_oif;
 		connected = false;
-	} else if (!fl6.flowi6_oif)
-		fl6.flowi6_oif = np->ucast_oif;
+	} else if (!fl6->flowi6_oif)
+		fl6->flowi6_oif = np->ucast_oif;
 
-	security_sk_classify_flow(sk, flowi6_to_flowi_common(&fl6));
+	security_sk_classify_flow(sk, flowi6_to_flowi_common(fl6));
 
 	if (ipc6.tclass < 0)
 		ipc6.tclass = np->tclass;
 
-	fl6.flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6.flowlabel);
+	fl6->flowlabel = ip6_make_flowinfo(ipc6.tclass, fl6->flowlabel);
 
-	dst = ip6_sk_dst_lookup_flow(sk, &fl6, final_p, connected);
+	dst = ip6_sk_dst_lookup_flow(sk, fl6, final_p, connected);
 	if (IS_ERR(dst)) {
 		err = PTR_ERR(dst);
 		dst = NULL;
@@ -1529,7 +1531,7 @@ do_udp_sendmsg:
 	}
 
 	if (ipc6.hlimit < 0)
-		ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
+		ipc6.hlimit = ip6_sk_dst_hoplimit(np, fl6, dst);
 
 	if (msg->msg_flags&MSG_CONFIRM)
 		goto do_confirm;
@@ -1537,17 +1539,17 @@ back_from_confirm:
 
 	/* Lockless fast path for the non-corking case */
 	if (!corkreq) {
-		struct inet_cork_full cork;
 		struct sk_buff *skb;
 
 		skb = ip6_make_skb(sk, getfrag, msg, ulen,
 				   sizeof(struct udphdr), &ipc6,
-				   &fl6, (struct rt6_info *)dst,
+				   (struct rt6_info *)dst,
 				   msg->msg_flags, &cork);
 		err = PTR_ERR(skb);
 		if (!IS_ERR_OR_NULL(skb))
-			err = udp_v6_send_skb(skb, &fl6, &cork.base);
-		goto out;
+			err = udp_v6_send_skb(skb, fl6, &cork.base);
+		/* ip6_make_skb steals dst reference */
+		goto out_no_dst;
 	}
 
 	lock_sock(sk);
@@ -1568,7 +1570,7 @@ do_append_data:
 		ipc6.dontfrag = np->dontfrag;
 	up->len += ulen;
 	err = ip6_append_data(sk, getfrag, msg, ulen, sizeof(struct udphdr),
-			      &ipc6, &fl6, (struct rt6_info *)dst,
+			      &ipc6, fl6, (struct rt6_info *)dst,
 			      corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags);
 	if (err)
 		udp_v6_flush_pending_frames(sk);
@@ -1603,7 +1605,7 @@ out_no_dst:
 
 do_confirm:
 	if (msg->msg_flags & MSG_PROBE)
-		dst_confirm_neigh(dst, &fl6.daddr);
+		dst_confirm_neigh(dst, &fl6->daddr);
 	if (!(msg->msg_flags&MSG_PROBE) || len)
 		goto back_from_confirm;
 	err = 0;
diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
index fad687ee6dd8..e64e427a51cf 100644
--- a/net/ipv6/xfrm6_policy.c
+++ b/net/ipv6/xfrm6_policy.c
@@ -33,8 +33,7 @@ static struct dst_entry *xfrm6_dst_lookup(struct net *net, int tos, int oif,
 	int err;
 
 	memset(&fl6, 0, sizeof(fl6));
-	fl6.flowi6_oif = l3mdev_master_ifindex_by_index(net, oif);
-	fl6.flowi6_flags = FLOWI_FLAG_SKIP_NH_OIF;
+	fl6.flowi6_l3mdev = l3mdev_master_ifindex_by_index(net, oif);
 	fl6.flowi6_mark = mark;
 	memcpy(&fl6.daddr, daddr, sizeof(fl6.daddr));
 	if (saddr)
@@ -92,7 +91,6 @@ static int xfrm6_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,
 	xdst->u.rt6.rt6i_src = rt->rt6i_src;
 	INIT_LIST_HEAD(&xdst->u.rt6.rt6i_uncached);
 	rt6_uncached_list_add(&xdst->u.rt6);
-	atomic_inc(&dev_net(dev)->ipv6.rt6_stats->fib_rt_uncache);
 
 	return 0;
 }
diff --git a/net/iucv/iucv.c b/net/iucv/iucv.c
index 8f4d49a7d3e8..eb0295d90039 100644
--- a/net/iucv/iucv.c
+++ b/net/iucv/iucv.c
@@ -319,7 +319,7 @@ static inline int iucv_call_b2f0(int command, union iucv_param *parm)
  */
 static int __iucv_query_maxconn(void *param, unsigned long *max_pathid)
 {
-	unsigned long reg1 = (unsigned long)param;
+	unsigned long reg1 = virt_to_phys(param);
 	int cc;
 
 	asm volatile (
diff --git a/net/l3mdev/l3mdev.c b/net/l3mdev/l3mdev.c
index 17927966abb3..4eb8892fb2ff 100644
--- a/net/l3mdev/l3mdev.c
+++ b/net/l3mdev/l3mdev.c
@@ -250,25 +250,19 @@ int l3mdev_fib_rule_match(struct net *net, struct flowi *fl,
 	struct net_device *dev;
 	int rc = 0;
 
-	rcu_read_lock();
+	/* update flow ensures flowi_l3mdev is set when relevant */
+	if (!fl->flowi_l3mdev)
+		return 0;
 
-	dev = dev_get_by_index_rcu(net, fl->flowi_oif);
-	if (dev && netif_is_l3_master(dev) &&
-	    dev->l3mdev_ops->l3mdev_fib_table) {
-		arg->table = dev->l3mdev_ops->l3mdev_fib_table(dev);
-		rc = 1;
-		goto out;
-	}
+	rcu_read_lock();
 
-	dev = dev_get_by_index_rcu(net, fl->flowi_iif);
+	dev = dev_get_by_index_rcu(net, fl->flowi_l3mdev);
 	if (dev && netif_is_l3_master(dev) &&
 	    dev->l3mdev_ops->l3mdev_fib_table) {
 		arg->table = dev->l3mdev_ops->l3mdev_fib_table(dev);
 		rc = 1;
-		goto out;
 	}
 
-out:
 	rcu_read_unlock();
 
 	return rc;
@@ -277,31 +271,28 @@ out:
 void l3mdev_update_flow(struct net *net, struct flowi *fl)
 {
 	struct net_device *dev;
-	int ifindex;
 
 	rcu_read_lock();
 
 	if (fl->flowi_oif) {
 		dev = dev_get_by_index_rcu(net, fl->flowi_oif);
 		if (dev) {
-			ifindex = l3mdev_master_ifindex_rcu(dev);
-			if (ifindex) {
-				fl->flowi_oif = ifindex;
-				fl->flowi_flags |= FLOWI_FLAG_SKIP_NH_OIF;
-				goto out;
-			}
+			if (!fl->flowi_l3mdev)
+				fl->flowi_l3mdev = l3mdev_master_ifindex_rcu(dev);
+
+			/* oif set to L3mdev directs lookup to its table;
+			 * reset to avoid oif match in fib_lookup
+			 */
+			if (netif_is_l3_master(dev))
+				fl->flowi_oif = 0;
+			goto out;
 		}
 	}
 
-	if (fl->flowi_iif) {
+	if (fl->flowi_iif > LOOPBACK_IFINDEX && !fl->flowi_l3mdev) {
 		dev = dev_get_by_index_rcu(net, fl->flowi_iif);
-		if (dev) {
-			ifindex = l3mdev_master_ifindex_rcu(dev);
-			if (ifindex) {
-				fl->flowi_iif = ifindex;
-				fl->flowi_flags |= FLOWI_FLAG_SKIP_NH_OIF;
-			}
-		}
+		if (dev)
+			fl->flowi_l3mdev = l3mdev_master_ifindex_rcu(dev);
 	}
 
 out:
diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c
index 26c00ebf4fba..c86256064743 100644
--- a/net/llc/af_llc.c
+++ b/net/llc/af_llc.c
@@ -311,6 +311,10 @@ static int llc_ui_autobind(struct socket *sock, struct sockaddr_llc *addr)
 	sock_reset_flag(sk, SOCK_ZAPPED);
 	rc = 0;
 out:
+	if (rc) {
+		dev_put_track(llc->dev, &llc->dev_tracker);
+		llc->dev = NULL;
+	}
 	return rc;
 }
 
@@ -408,6 +412,10 @@ static int llc_ui_bind(struct socket *sock, struct sockaddr *uaddr, int addrlen)
 out_put:
 	llc_sap_put(sap);
 out:
+	if (rc) {
+		dev_put_track(llc->dev, &llc->dev_tracker);
+		llc->dev = NULL;
+	}
 	release_sock(sk);
 	return rc;
 }
diff --git a/net/mac80211/Makefile b/net/mac80211/Makefile
index 23d25e8b2358..af1df3a6bd55 100644
--- a/net/mac80211/Makefile
+++ b/net/mac80211/Makefile
@@ -34,7 +34,8 @@ mac80211-y := \
 	trace.o mlme.o \
 	tdls.o \
 	ocb.o \
-	airtime.o
+	airtime.o \
+	eht.o
 
 mac80211-$(CONFIG_MAC80211_LEDS) += led.o
 mac80211-$(CONFIG_MAC80211_DEBUGFS) += \
diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c
index 7d2925bb966e..218cdc554d71 100644
--- a/net/mac80211/agg-rx.c
+++ b/net/mac80211/agg-rx.c
@@ -180,7 +180,8 @@ static void sta_rx_agg_reorder_timer_expired(struct timer_list *t)
 
 static void ieee80211_add_addbaext(struct ieee80211_sub_if_data *sdata,
 				   struct sk_buff *skb,
-				   const struct ieee80211_addba_ext_ie *req)
+				   const struct ieee80211_addba_ext_ie *req,
+				   u16 buf_size)
 {
 	struct ieee80211_supported_band *sband;
 	struct ieee80211_addba_ext_ie *resp;
@@ -210,6 +211,8 @@ static void ieee80211_add_addbaext(struct ieee80211_sub_if_data *sdata,
 		frag_level = cap_frag_level;
 	resp->data |= u8_encode_bits(frag_level,
 				     IEEE80211_ADDBA_EXT_FRAG_LEVEL_MASK);
+	resp->data |= u8_encode_bits(buf_size >> IEEE80211_ADDBA_EXT_BUF_SIZE_SHIFT,
+				     IEEE80211_ADDBA_EXT_BUF_SIZE_MASK);
 }
 
 static void ieee80211_send_addba_resp(struct sta_info *sta, u8 *da, u16 tid,
@@ -261,7 +264,7 @@ static void ieee80211_send_addba_resp(struct sta_info *sta, u8 *da, u16 tid,
 	mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
 
 	if (sta->sta.he_cap.has_he && addbaext)
-		ieee80211_add_addbaext(sdata, skb, addbaext);
+		ieee80211_add_addbaext(sdata, skb, addbaext, buf_size);
 
 	ieee80211_tx_skb(sdata, skb);
 }
@@ -309,8 +312,10 @@ void ___ieee80211_start_rx_ba_session(struct sta_info *sta,
 		goto end;
 	}
 
-	if (sta->sta.he_cap.has_he)
-		max_buf_size = IEEE80211_MAX_AMPDU_BUF;
+	if (sta->sta.eht_cap.has_eht)
+		max_buf_size = IEEE80211_MAX_AMPDU_BUF_EHT;
+	else if (sta->sta.he_cap.has_he)
+		max_buf_size = IEEE80211_MAX_AMPDU_BUF_HE;
 	else
 		max_buf_size = IEEE80211_MAX_AMPDU_BUF_HT;
 
@@ -502,6 +507,13 @@ void ieee80211_process_addba_request(struct ieee80211_local *local,
 			goto free;
 	}
 
+	if (sta->sta.eht_cap.has_eht && elems && elems->addba_ext_ie) {
+		u8 buf_size_1k = u8_get_bits(elems->addba_ext_ie->data,
+					     IEEE80211_ADDBA_EXT_BUF_SIZE_MASK);
+
+		buf_size |= buf_size_1k << IEEE80211_ADDBA_EXT_BUF_SIZE_SHIFT;
+	}
+
 	__ieee80211_start_rx_ba_session(sta, dialog_token, timeout,
 					start_seq_num, ba_policy, tid,
 					buf_size, true, false,
diff --git a/net/mac80211/airtime.c b/net/mac80211/airtime.c
index 26d2f8ba7029..2619e12c8bda 100644
--- a/net/mac80211/airtime.c
+++ b/net/mac80211/airtime.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: ISC
 /*
  * Copyright (C) 2019 Felix Fietkau <nbd@nbd.name>
+ * Copyright (C) 2021 Intel Corporation
  */
 
 #include <net/mac80211.h>
@@ -67,17 +68,11 @@
 #define IEEE80211_VHT_STREAM_GROUPS	8 /* BW(=4) * SGI(=2) */
 
 #define IEEE80211_HE_MAX_STREAMS	8
-#define IEEE80211_HE_STREAM_GROUPS	12 /* BW(=4) * GI(=3) */
 
 #define IEEE80211_HT_GROUPS_NB	(IEEE80211_MAX_STREAMS *	\
 				 IEEE80211_HT_STREAM_GROUPS)
 #define IEEE80211_VHT_GROUPS_NB	(IEEE80211_MAX_STREAMS *	\
 					 IEEE80211_VHT_STREAM_GROUPS)
-#define IEEE80211_HE_GROUPS_NB	(IEEE80211_HE_MAX_STREAMS *	\
-				 IEEE80211_HE_STREAM_GROUPS)
-#define IEEE80211_GROUPS_NB	(IEEE80211_HT_GROUPS_NB +	\
-				 IEEE80211_VHT_GROUPS_NB +	\
-				 IEEE80211_HE_GROUPS_NB)
 
 #define IEEE80211_HT_GROUP_0	0
 #define IEEE80211_VHT_GROUP_0	(IEEE80211_HT_GROUP_0 + IEEE80211_HT_GROUPS_NB)
@@ -477,7 +472,9 @@ u32 ieee80211_calc_rx_airtime(struct ieee80211_hw *hw,
 		bool sp = status->enc_flags & RX_ENC_FLAG_SHORTPRE;
 		bool cck;
 
-		if (WARN_ON_ONCE(status->band > NL80211_BAND_5GHZ))
+		/* on 60GHz or sub-1GHz band, there are no legacy rates */
+		if (WARN_ON_ONCE(status->band == NL80211_BAND_60GHZ ||
+				 status->band == NL80211_BAND_S1GHZ))
 			return 0;
 
 		sband = hw->wiphy->bands[status->band];
@@ -650,12 +647,12 @@ u32 ieee80211_calc_expected_tx_airtime(struct ieee80211_hw *hw,
 		struct sta_info *sta = container_of(pubsta, struct sta_info,
 						    sta);
 		struct ieee80211_rx_status stat;
-		struct ieee80211_tx_rate *rate = &sta->tx_stats.last_rate;
+		struct ieee80211_tx_rate *tx_rate = &sta->tx_stats.last_rate;
 		struct rate_info *ri = &sta->tx_stats.last_rate_info;
 		u32 duration, overhead;
 		u8 agg_shift;
 
-		if (ieee80211_fill_rx_status(&stat, hw, rate, ri, band, len))
+		if (ieee80211_fill_rx_status(&stat, hw, tx_rate, ri, band, len))
 			return 0;
 
 		if (stat.encoding == RX_ENC_LEGACY || !ampdu)
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 87a208089caf..ba752539d1d9 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -989,11 +989,29 @@ static int ieee80211_set_ftm_responder_params(
 	return 0;
 }
 
+static int
+ieee80211_copy_mbssid_beacon(u8 *pos, struct cfg80211_mbssid_elems *dst,
+			     struct cfg80211_mbssid_elems *src)
+{
+	int i, offset = 0;
+
+	for (i = 0; i < src->cnt; i++) {
+		memcpy(pos + offset, src->elem[i].data, src->elem[i].len);
+		dst->elem[i].len = src->elem[i].len;
+		dst->elem[i].data = pos + offset;
+		offset += dst->elem[i].len;
+	}
+	dst->cnt = src->cnt;
+
+	return offset;
+}
+
 static int ieee80211_assign_beacon(struct ieee80211_sub_if_data *sdata,
 				   struct cfg80211_beacon_data *params,
 				   const struct ieee80211_csa_settings *csa,
 				   const struct ieee80211_color_change_settings *cca)
 {
+	struct cfg80211_mbssid_elems *mbssid = NULL;
 	struct beacon_data *new, *old;
 	int new_head_len, new_tail_len;
 	int size, err;
@@ -1021,6 +1039,17 @@ static int ieee80211_assign_beacon(struct ieee80211_sub_if_data *sdata,
 
 	size = sizeof(*new) + new_head_len + new_tail_len;
 
+	/* new or old multiple BSSID elements? */
+	if (params->mbssid_ies) {
+		mbssid = params->mbssid_ies;
+		size += struct_size(new->mbssid_ies, elem, mbssid->cnt);
+		size += ieee80211_get_mbssid_beacon_len(mbssid);
+	} else if (old && old->mbssid_ies) {
+		mbssid = old->mbssid_ies;
+		size += struct_size(new->mbssid_ies, elem, mbssid->cnt);
+		size += ieee80211_get_mbssid_beacon_len(mbssid);
+	}
+
 	new = kzalloc(size, GFP_KERNEL);
 	if (!new)
 		return -ENOMEM;
@@ -1029,12 +1058,23 @@ static int ieee80211_assign_beacon(struct ieee80211_sub_if_data *sdata,
 
 	/*
 	 * pointers go into the block we allocated,
-	 * memory is | beacon_data | head | tail |
+	 * memory is | beacon_data | head | tail | mbssid_ies
 	 */
 	new->head = ((u8 *) new) + sizeof(*new);
 	new->tail = new->head + new_head_len;
 	new->head_len = new_head_len;
 	new->tail_len = new_tail_len;
+	/* copy in optional mbssid_ies */
+	if (mbssid) {
+		u8 *pos = new->tail + new->tail_len;
+
+		new->mbssid_ies = (void *)pos;
+		pos += struct_size(new->mbssid_ies, elem, mbssid->cnt);
+		ieee80211_copy_mbssid_beacon(pos, new->mbssid_ies, mbssid);
+		/* update bssid_indicator */
+		sdata->vif.bss_conf.bssid_indicator =
+			ilog2(__roundup_pow_of_two(mbssid->cnt + 1));
+	}
 
 	if (csa) {
 		new->cntdwn_current_counter = csa->count;
@@ -1332,8 +1372,11 @@ static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
 
 	mutex_unlock(&local->mtx);
 
-	kfree(sdata->u.ap.next_beacon);
-	sdata->u.ap.next_beacon = NULL;
+	if (sdata->u.ap.next_beacon) {
+		kfree(sdata->u.ap.next_beacon->mbssid_ies);
+		kfree(sdata->u.ap.next_beacon);
+		sdata->u.ap.next_beacon = NULL;
+	}
 
 	/* turn off carrier for this interface and dependent VLANs */
 	list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
@@ -1716,6 +1759,14 @@ static int sta_apply_parameters(struct ieee80211_local *local,
 						  (void *)params->he_6ghz_capa,
 						  sta);
 
+	if (params->eht_capa)
+		ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband,
+						    (u8 *)params->he_capa,
+						    params->he_capa_len,
+						    params->eht_capa,
+						    params->eht_capa_len,
+						    sta);
+
 	if (params->opmode_notif_used) {
 		/* returned value is only needed for rc update, but the
 		 * rc isn't initialized here yet, so ignore it
@@ -2148,14 +2199,12 @@ static int copy_mesh_setup(struct ieee80211_if_mesh *ifmsh,
 		const struct mesh_setup *setup)
 {
 	u8 *new_ie;
-	const u8 *old_ie;
 	struct ieee80211_sub_if_data *sdata = container_of(ifmsh,
 					struct ieee80211_sub_if_data, u.mesh);
 	int i;
 
 	/* allocate information elements */
 	new_ie = NULL;
-	old_ie = ifmsh->ie;
 
 	if (setup->ie_len) {
 		new_ie = kmemdup(setup->ie, setup->ie_len,
@@ -2165,7 +2214,6 @@ static int copy_mesh_setup(struct ieee80211_if_mesh *ifmsh,
 	}
 	ifmsh->ie_len = setup->ie_len;
 	ifmsh->ie = new_ie;
-	kfree(old_ie);
 
 	/* now copy the rest of the setup parameters */
 	ifmsh->mesh_id_len = setup->mesh_id_len;
@@ -3130,12 +3178,24 @@ cfg80211_beacon_dup(struct cfg80211_beacon_data *beacon)
 
 	len = beacon->head_len + beacon->tail_len + beacon->beacon_ies_len +
 	      beacon->proberesp_ies_len + beacon->assocresp_ies_len +
-	      beacon->probe_resp_len + beacon->lci_len + beacon->civicloc_len;
+	      beacon->probe_resp_len + beacon->lci_len + beacon->civicloc_len +
+	      ieee80211_get_mbssid_beacon_len(beacon->mbssid_ies);
 
 	new_beacon = kzalloc(sizeof(*new_beacon) + len, GFP_KERNEL);
 	if (!new_beacon)
 		return NULL;
 
+	if (beacon->mbssid_ies && beacon->mbssid_ies->cnt) {
+		new_beacon->mbssid_ies =
+			kzalloc(struct_size(new_beacon->mbssid_ies,
+					    elem, beacon->mbssid_ies->cnt),
+				GFP_KERNEL);
+		if (!new_beacon->mbssid_ies) {
+			kfree(new_beacon);
+			return NULL;
+		}
+	}
+
 	pos = (u8 *)(new_beacon + 1);
 	if (beacon->head_len) {
 		new_beacon->head_len = beacon->head_len;
@@ -3173,6 +3233,10 @@ cfg80211_beacon_dup(struct cfg80211_beacon_data *beacon)
 		memcpy(pos, beacon->probe_resp, beacon->probe_resp_len);
 		pos += beacon->probe_resp_len;
 	}
+	if (beacon->mbssid_ies && beacon->mbssid_ies->cnt)
+		pos += ieee80211_copy_mbssid_beacon(pos,
+						    new_beacon->mbssid_ies,
+						    beacon->mbssid_ies);
 
 	/* might copy -1, meaning no changes requested */
 	new_beacon->ftm_responder = beacon->ftm_responder;
@@ -3195,9 +3259,31 @@ cfg80211_beacon_dup(struct cfg80211_beacon_data *beacon)
 void ieee80211_csa_finish(struct ieee80211_vif *vif)
 {
 	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct ieee80211_local *local = sdata->local;
 
-	ieee80211_queue_work(&sdata->local->hw,
-			     &sdata->csa_finalize_work);
+	rcu_read_lock();
+
+	if (vif->mbssid_tx_vif == vif) {
+		/* Trigger ieee80211_csa_finish() on the non-transmitting
+		 * interfaces when channel switch is received on
+		 * transmitting interface
+		 */
+		struct ieee80211_sub_if_data *iter;
+
+		list_for_each_entry_rcu(iter, &local->interfaces, list) {
+			if (!ieee80211_sdata_running(iter))
+				continue;
+
+			if (iter == sdata || iter->vif.mbssid_tx_vif != vif)
+				continue;
+
+			ieee80211_queue_work(&iter->local->hw,
+					     &iter->csa_finalize_work);
+		}
+	}
+	ieee80211_queue_work(&local->hw, &sdata->csa_finalize_work);
+
+	rcu_read_unlock();
 }
 EXPORT_SYMBOL(ieee80211_csa_finish);
 
@@ -3222,8 +3308,11 @@ static int ieee80211_set_after_csa_beacon(struct ieee80211_sub_if_data *sdata,
 	case NL80211_IFTYPE_AP:
 		err = ieee80211_assign_beacon(sdata, sdata->u.ap.next_beacon,
 					      NULL, NULL);
-		kfree(sdata->u.ap.next_beacon);
-		sdata->u.ap.next_beacon = NULL;
+		if (sdata->u.ap.next_beacon) {
+			kfree(sdata->u.ap.next_beacon->mbssid_ies);
+			kfree(sdata->u.ap.next_beacon);
+			sdata->u.ap.next_beacon = NULL;
+		}
 
 		if (err < 0)
 			return err;
@@ -3378,8 +3467,12 @@ static int ieee80211_set_csa_beacon(struct ieee80211_sub_if_data *sdata,
 		if ((params->n_counter_offsets_beacon >
 		     IEEE80211_MAX_CNTDWN_COUNTERS_NUM) ||
 		    (params->n_counter_offsets_presp >
-		     IEEE80211_MAX_CNTDWN_COUNTERS_NUM))
+		     IEEE80211_MAX_CNTDWN_COUNTERS_NUM)) {
+			kfree(sdata->u.ap.next_beacon->mbssid_ies);
+			kfree(sdata->u.ap.next_beacon);
+			sdata->u.ap.next_beacon = NULL;
 			return -EINVAL;
+		}
 
 		csa.counter_offsets_beacon = params->counter_offsets_beacon;
 		csa.counter_offsets_presp = params->counter_offsets_presp;
@@ -3389,7 +3482,9 @@ static int ieee80211_set_csa_beacon(struct ieee80211_sub_if_data *sdata,
 
 		err = ieee80211_assign_beacon(sdata, &params->beacon_csa, &csa, NULL);
 		if (err < 0) {
+			kfree(sdata->u.ap.next_beacon->mbssid_ies);
 			kfree(sdata->u.ap.next_beacon);
+			sdata->u.ap.next_beacon = NULL;
 			return err;
 		}
 		*changed |= err;
@@ -3479,8 +3574,11 @@ static int ieee80211_set_csa_beacon(struct ieee80211_sub_if_data *sdata,
 static void ieee80211_color_change_abort(struct ieee80211_sub_if_data  *sdata)
 {
 	sdata->vif.color_change_active = false;
-	kfree(sdata->u.ap.next_beacon);
-	sdata->u.ap.next_beacon = NULL;
+	if (sdata->u.ap.next_beacon) {
+		kfree(sdata->u.ap.next_beacon->mbssid_ies);
+		kfree(sdata->u.ap.next_beacon);
+		sdata->u.ap.next_beacon = NULL;
+	}
 
 	cfg80211_color_change_aborted_notify(sdata->dev);
 }
@@ -4218,8 +4316,11 @@ ieee80211_set_after_color_change_beacon(struct ieee80211_sub_if_data *sdata,
 
 		ret = ieee80211_assign_beacon(sdata, sdata->u.ap.next_beacon,
 					      NULL, NULL);
-		kfree(sdata->u.ap.next_beacon);
-		sdata->u.ap.next_beacon = NULL;
+		if (sdata->u.ap.next_beacon) {
+			kfree(sdata->u.ap.next_beacon->mbssid_ies);
+			kfree(sdata->u.ap.next_beacon);
+			sdata->u.ap.next_beacon = NULL;
+		}
 
 		if (ret < 0)
 			return ret;
@@ -4262,7 +4363,11 @@ ieee80211_set_color_change_beacon(struct ieee80211_sub_if_data *sdata,
 		err = ieee80211_assign_beacon(sdata, &params->beacon_color_change,
 					      NULL, &color_change);
 		if (err < 0) {
-			kfree(sdata->u.ap.next_beacon);
+			if (sdata->u.ap.next_beacon) {
+				kfree(sdata->u.ap.next_beacon->mbssid_ies);
+				kfree(sdata->u.ap.next_beacon);
+				sdata->u.ap.next_beacon = NULL;
+			}
 			return err;
 		}
 		*changed |= err;
diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c
index 76fc36a68750..e26d42de14ec 100644
--- a/net/mac80211/chan.c
+++ b/net/mac80211/chan.c
@@ -218,6 +218,8 @@ static enum nl80211_chan_width ieee80211_get_sta_bw(struct sta_info *sta)
 		 * might be smaller than the configured bw (160).
 		 */
 		return NL80211_CHAN_WIDTH_160;
+	case IEEE80211_STA_RX_BW_320:
+		return NL80211_CHAN_WIDTH_320;
 	default:
 		WARN_ON(1);
 		return NL80211_CHAN_WIDTH_20;
@@ -417,7 +419,7 @@ static void ieee80211_change_chanctx(struct ieee80211_local *local,
 {
 	u32 changed;
 
-	/* expected to handle only 20/40/80/160 channel widths */
+	/* expected to handle only 20/40/80/160/320 channel widths */
 	switch (chandef->width) {
 	case NL80211_CHAN_WIDTH_20_NOHT:
 	case NL80211_CHAN_WIDTH_20:
@@ -425,6 +427,7 @@ static void ieee80211_change_chanctx(struct ieee80211_local *local,
 	case NL80211_CHAN_WIDTH_80:
 	case NL80211_CHAN_WIDTH_80P80:
 	case NL80211_CHAN_WIDTH_160:
+	case NL80211_CHAN_WIDTH_320:
 		break;
 	default:
 		WARN_ON(1);
diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c
index 8dbfe325ee66..f4c9a92f50f9 100644
--- a/net/mac80211/debugfs.c
+++ b/net/mac80211/debugfs.c
@@ -634,8 +634,10 @@ static const struct file_operations stats_ ##name## _ops = {		\
 	.llseek = generic_file_llseek,					\
 };
 
+#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 #define DEBUGFS_STATS_ADD(name)					\
 	debugfs_create_u32(#name, 0400, statsd, &local->name);
+#endif
 #define DEBUGFS_DEVSTATS_ADD(name)					\
 	debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
 
diff --git a/net/mac80211/debugfs_key.c b/net/mac80211/debugfs_key.c
index f53dec8a3d5c..edc7792e1361 100644
--- a/net/mac80211/debugfs_key.c
+++ b/net/mac80211/debugfs_key.c
@@ -4,6 +4,7 @@
  * Copyright (c) 2006	Jiri Benc <jbenc@suse.cz>
  * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
  * Copyright (C) 2015	Intel Deutschland GmbH
+ * Copyright (C) 2021   Intel Corporation
  */
 
 #include <linux/kobject.h>
@@ -22,7 +23,6 @@ static ssize_t key_##name##_read(struct file *file,			\
 	return mac80211_format_buffer(userbuf, count, ppos, 		\
 				      format_string, key->prop);	\
 }
-#define KEY_READ_D(name) KEY_READ(name, name, "%d\n")
 #define KEY_READ_X(name) KEY_READ(name, name, "0x%x\n")
 
 #define KEY_OPS(name)							\
diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index db724fc10a5f..e490c3da3aca 100644
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -2,7 +2,7 @@
 /*
  * Copyright (c) 2006	Jiri Benc <jbenc@suse.cz>
  * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
- * Copyright (C) 2020 Intel Corporation
+ * Copyright (C) 2020-2021 Intel Corporation
  */
 
 #include <linux/kernel.h>
@@ -77,8 +77,6 @@ static ssize_t ieee80211_if_fmt_##name(					\
 		IEEE80211_IF_FMT(name, field, "%#x\n")
 #define IEEE80211_IF_FMT_LHEX(name, field)				\
 		IEEE80211_IF_FMT(name, field, "%#lx\n")
-#define IEEE80211_IF_FMT_SIZE(name, field)				\
-		IEEE80211_IF_FMT(name, field, "%zd\n")
 
 #define IEEE80211_IF_FMT_HEXARRAY(name, field)				\
 static ssize_t ieee80211_if_fmt_##name(					\
diff --git a/net/mac80211/eht.c b/net/mac80211/eht.c
new file mode 100644
index 000000000000..364ad0ef7692
--- /dev/null
+++ b/net/mac80211/eht.c
@@ -0,0 +1,76 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * EHT handling
+ *
+ * Copyright(c) 2021-2022 Intel Corporation
+ */
+
+#include "ieee80211_i.h"
+
+void
+ieee80211_eht_cap_ie_to_sta_eht_cap(struct ieee80211_sub_if_data *sdata,
+				    struct ieee80211_supported_band *sband,
+				    const u8 *he_cap_ie, u8 he_cap_len,
+				    const struct ieee80211_eht_cap_elem *eht_cap_ie_elem,
+				    u8 eht_cap_len, struct sta_info *sta)
+{
+	struct ieee80211_sta_eht_cap *eht_cap = &sta->sta.eht_cap;
+	struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie;
+	u8 eht_ppe_size = 0;
+	u8 mcs_nss_size;
+	u8 eht_total_size = sizeof(eht_cap->eht_cap_elem);
+	u8 *pos = (u8 *)eht_cap_ie_elem;
+
+	memset(eht_cap, 0, sizeof(*eht_cap));
+
+	if (!eht_cap_ie_elem ||
+	    !ieee80211_get_eht_iftype_cap(sband,
+					 ieee80211_vif_type_p2p(&sdata->vif)))
+		return;
+
+	mcs_nss_size = ieee80211_eht_mcs_nss_size(he_cap_ie_elem,
+						  &eht_cap_ie_elem->fixed);
+
+	eht_total_size += mcs_nss_size;
+
+	/* Calculate the PPE thresholds length only if the header is present */
+	if (eht_cap_ie_elem->fixed.phy_cap_info[5] &
+			IEEE80211_EHT_PHY_CAP5_PPE_THRESHOLD_PRESENT) {
+		u16 eht_ppe_hdr;
+
+		if (eht_cap_len < eht_total_size + sizeof(u16))
+			return;
+
+		eht_ppe_hdr = get_unaligned_le16(eht_cap_ie_elem->optional + mcs_nss_size);
+		eht_ppe_size =
+			ieee80211_eht_ppe_size(eht_ppe_hdr,
+					       eht_cap_ie_elem->fixed.phy_cap_info);
+		eht_total_size += eht_ppe_size;
+
+		/* we calculate as if NSS > 8 are valid, but don't handle that */
+		if (eht_ppe_size > sizeof(eht_cap->eht_ppe_thres))
+			return;
+	}
+
+	if (eht_cap_len < eht_total_size)
+		return;
+
+	/* Copy the static portion of the EHT capabilities */
+	memcpy(&eht_cap->eht_cap_elem, pos, sizeof(eht_cap->eht_cap_elem));
+	pos += sizeof(eht_cap->eht_cap_elem);
+
+	/* Copy MCS/NSS which depends on the peer capabilities */
+	memset(&eht_cap->eht_mcs_nss_supp, 0,
+	       sizeof(eht_cap->eht_mcs_nss_supp));
+	memcpy(&eht_cap->eht_mcs_nss_supp, pos, mcs_nss_size);
+
+	if (eht_ppe_size)
+		memcpy(eht_cap->eht_ppe_thres,
+		       &eht_cap_ie_elem->optional[mcs_nss_size],
+		       eht_ppe_size);
+
+	eht_cap->has_eht = true;
+
+	sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(sta);
+	sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta);
+}
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index e87bccaab561..d4a7ba4a8202 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -257,6 +257,7 @@ struct beacon_data {
 	struct ieee80211_meshconf_ie *meshconf;
 	u16 cntdwn_counter_offsets[IEEE80211_MAX_CNTDWN_COUNTERS_NUM];
 	u8 cntdwn_current_counter;
+	struct cfg80211_mbssid_elems *mbssid_ies;
 	struct rcu_head rcu_head;
 };
 
@@ -366,6 +367,8 @@ enum ieee80211_sta_flags {
 	IEEE80211_STA_DISABLE_WMM	= BIT(14),
 	IEEE80211_STA_ENABLE_RRM	= BIT(15),
 	IEEE80211_STA_DISABLE_HE	= BIT(16),
+	IEEE80211_STA_DISABLE_EHT	= BIT(17),
+	IEEE80211_STA_DISABLE_320MHZ	= BIT(18),
 };
 
 struct ieee80211_mgd_auth_data {
@@ -765,6 +768,8 @@ struct ieee80211_if_mesh {
  *	back to wireless media and to the local net stack.
  * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
  * @IEEE80211_SDATA_IN_DRIVER: indicates interface was added to driver
+ * @IEEE80211_SDATA_DISCONNECT_HW_RESTART: Disconnect after hardware restart
+ *  recovery
  */
 enum ieee80211_sub_if_data_flags {
 	IEEE80211_SDATA_ALLMULTI		= BIT(0),
@@ -772,6 +777,7 @@ enum ieee80211_sub_if_data_flags {
 	IEEE80211_SDATA_DONT_BRIDGE_PACKETS	= BIT(3),
 	IEEE80211_SDATA_DISCONNECT_RESUME	= BIT(4),
 	IEEE80211_SDATA_IN_DRIVER		= BIT(5),
+	IEEE80211_SDATA_DISCONNECT_HW_RESTART	= BIT(6),
 };
 
 /**
@@ -1078,6 +1084,20 @@ ieee80211_vif_get_shift(struct ieee80211_vif *vif)
 	return shift;
 }
 
+static inline int
+ieee80211_get_mbssid_beacon_len(struct cfg80211_mbssid_elems *elems)
+{
+	int i, len = 0;
+
+	if (!elems)
+		return 0;
+
+	for (i = 0; i < elems->cnt; i++)
+		len += elems->elem[i].len;
+
+	return len;
+}
+
 enum {
 	IEEE80211_RX_MSG	= 1,
 	IEEE80211_TX_STATUS_MSG	= 2,
@@ -1587,6 +1607,8 @@ struct ieee802_11_elems {
 	const struct ieee80211_s1g_oper_ie *s1g_oper;
 	const struct ieee80211_s1g_bcn_compat_ie *s1g_bcn_compat;
 	const struct ieee80211_aid_response_ie *aid_resp;
+	const struct ieee80211_eht_cap_elem *eht_cap;
+	const struct ieee80211_eht_operation *eht_operation;
 
 	/* length of them, respectively */
 	u8 ext_capab_len;
@@ -1608,6 +1630,7 @@ struct ieee802_11_elems {
 	u8 bssid_index_len;
 	u8 tx_pwr_env_len[IEEE80211_TPE_MAX_IE_COUNT];
 	u8 tx_pwr_env_num;
+	u8 eht_cap_len;
 
 	/* whether a parse error occurred while retrieving these elements */
 	bool parse_error;
@@ -2380,7 +2403,7 @@ u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
 				const struct cfg80211_chan_def *chandef);
 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype);
-u8 *ieee80211_ie_build_he_cap(u8 *pos,
+u8 *ieee80211_ie_build_he_cap(u32 disable_flags, u8 *pos,
 			      const struct ieee80211_sta_he_cap *he_cap,
 			      u8 *end);
 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
@@ -2411,6 +2434,7 @@ bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
 				struct cfg80211_chan_def *chandef);
 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
 				    const struct ieee80211_he_operation *he_oper,
+				    const struct ieee80211_eht_operation *eht_oper,
 				    struct cfg80211_chan_def *chandef);
 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
 				struct cfg80211_chan_def *chandef);
@@ -2514,4 +2538,16 @@ u32 ieee80211_calc_expected_tx_airtime(struct ieee80211_hw *hw,
 void ieee80211_init_frag_cache(struct ieee80211_fragment_cache *cache);
 void ieee80211_destroy_frag_cache(struct ieee80211_fragment_cache *cache);
 
+u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata, u8 iftype);
+u8 *ieee80211_ie_build_eht_cap(u8 *pos,
+			       const struct ieee80211_sta_he_cap *he_cap,
+			       const struct ieee80211_sta_eht_cap *eht_cap,
+			       u8 *end);
+
+void
+ieee80211_eht_cap_ie_to_sta_eht_cap(struct ieee80211_sub_if_data *sdata,
+				    struct ieee80211_supported_band *sband,
+				    const u8 *he_cap_ie, u8 he_cap_len,
+				    const struct ieee80211_eht_cap_elem *eht_cap_ie_elem,
+				    u8 eht_cap_len, struct sta_info *sta);
 #endif /* IEEE80211_I_H */
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 5311c3cd3050..a48a32f87897 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -909,7 +909,7 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
 	int result, i;
 	enum nl80211_band band;
 	int channels, max_bitrates;
-	bool supp_ht, supp_vht, supp_he;
+	bool supp_ht, supp_vht, supp_he, supp_eht;
 	struct cfg80211_chan_def dflt_chandef = {};
 
 	if (ieee80211_hw_check(hw, QUEUE_CONTROL) &&
@@ -978,6 +978,7 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
 	supp_ht = false;
 	supp_vht = false;
 	supp_he = false;
+	supp_eht = false;
 	for (band = 0; band < NUM_NL80211_BANDS; band++) {
 		struct ieee80211_supported_band *sband;
 
@@ -1021,6 +1022,7 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
 			iftd = &sband->iftype_data[i];
 
 			supp_he = supp_he || iftd->he_cap.has_he;
+			supp_eht = supp_eht || iftd->eht_cap.has_eht;
 		}
 
 		/* HT, VHT, HE require QoS, thus >= 4 queues */
@@ -1028,6 +1030,10 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
 			    (supp_ht || supp_vht || supp_he)))
 			return -EINVAL;
 
+		/* EHT requires HE support */
+		if (WARN_ON(supp_eht && !supp_he))
+			return -EINVAL;
+
 		if (!sband->ht_cap.ht_supported)
 			continue;
 
@@ -1138,6 +1144,12 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
 			3 + sizeof(struct ieee80211_he_cap_elem) +
 			sizeof(struct ieee80211_he_mcs_nss_supp) +
 			IEEE80211_HE_PPE_THRES_MAX_LEN;
+
+		if (supp_eht)
+			local->scan_ies_len +=
+				3 + sizeof(struct ieee80211_eht_cap_elem) +
+				sizeof(struct ieee80211_eht_mcs_nss_supp) +
+				IEEE80211_EHT_PPE_THRES_MAX_LEN;
 	}
 
 	if (!local->ops->hw_scan) {
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 15ac08d111ea..5275f4f32a78 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2008, 2009 open80211s Ltd.
- * Copyright (C) 2018 - 2020 Intel Corporation
+ * Copyright (C) 2018 - 2021 Intel Corporation
  * Authors:    Luis Carlos Cobo <luisca@cozybit.com>
  * 	       Javier Cardona <javier@cozybit.com>
  */
@@ -104,7 +104,8 @@ bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
 	ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info,
 				   ie->vht_operation, ie->ht_operation,
 				   &sta_chan_def);
-	ieee80211_chandef_he_6ghz_oper(sdata, ie->he_operation, &sta_chan_def);
+	ieee80211_chandef_he_6ghz_oper(sdata, ie->he_operation, NULL,
+				       &sta_chan_def);
 
 	if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef,
 					 &sta_chan_def))
@@ -580,7 +581,7 @@ int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata,
 		return -ENOMEM;
 
 	pos = skb_put(skb, ie_len);
-	ieee80211_ie_build_he_cap(pos, he_cap, pos + ie_len);
+	ieee80211_ie_build_he_cap(0, pos, he_cap, pos + ie_len);
 
 	return 0;
 }
@@ -852,7 +853,7 @@ ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
 
 	bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL);
 	/* need an skb for IE builders to operate on */
-	skb = dev_alloc_skb(max(head_len, tail_len));
+	skb = __dev_alloc_skb(max(head_len, tail_len), GFP_KERNEL);
 
 	if (!bcn || !skb)
 		goto out_free;
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 744842c4513b..1b30c724ca8d 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -150,6 +150,7 @@ ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 			     const struct ieee80211_ht_operation *ht_oper,
 			     const struct ieee80211_vht_operation *vht_oper,
 			     const struct ieee80211_he_operation *he_oper,
+			     const struct ieee80211_eht_operation *eht_oper,
 			     const struct ieee80211_s1g_oper_ie *s1g_oper,
 			     struct cfg80211_chan_def *chandef, bool tracking)
 {
@@ -165,12 +166,14 @@ ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 	chandef->freq1_offset = channel->freq_offset;
 
 	if (channel->band == NL80211_BAND_6GHZ) {
-		if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, chandef)) {
+		if (!ieee80211_chandef_he_6ghz_oper(sdata, he_oper, eht_oper,
+						    chandef)) {
 			mlme_dbg(sdata,
-				 "bad 6 GHz operation, disabling HT/VHT/HE\n");
+				 "bad 6 GHz operation, disabling HT/VHT/HE/EHT\n");
 			ret = IEEE80211_STA_DISABLE_HT |
 			      IEEE80211_STA_DISABLE_VHT |
-			      IEEE80211_STA_DISABLE_HE;
+			      IEEE80211_STA_DISABLE_HE |
+			      IEEE80211_STA_DISABLE_EHT;
 		} else {
 			ret = 0;
 		}
@@ -197,7 +200,8 @@ ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 		mlme_dbg(sdata, "HT operation missing / HT not supported\n");
 		ret = IEEE80211_STA_DISABLE_HT |
 		      IEEE80211_STA_DISABLE_VHT |
-		      IEEE80211_STA_DISABLE_HE;
+		      IEEE80211_STA_DISABLE_HE |
+		      IEEE80211_STA_DISABLE_EHT;
 		goto out;
 	}
 
@@ -220,7 +224,8 @@ ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 			   ht_oper->primary_chan, channel->band);
 		ret = IEEE80211_STA_DISABLE_HT |
 		      IEEE80211_STA_DISABLE_VHT |
-		      IEEE80211_STA_DISABLE_HE;
+		      IEEE80211_STA_DISABLE_HE |
+		      IEEE80211_STA_DISABLE_EHT;
 		goto out;
 	}
 
@@ -261,7 +266,7 @@ ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 			if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
 				sdata_info(sdata,
 					   "HE AP VHT information is invalid, disabling HE\n");
-			ret = IEEE80211_STA_DISABLE_HE;
+			ret = IEEE80211_STA_DISABLE_HE | IEEE80211_STA_DISABLE_EHT;
 			goto out;
 		}
 	} else if (!ieee80211_chandef_vht_oper(&sdata->local->hw,
@@ -341,7 +346,8 @@ out:
 		if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
 			ret = IEEE80211_STA_DISABLE_HT |
 			      IEEE80211_STA_DISABLE_VHT |
-			      IEEE80211_STA_DISABLE_HE;
+			      IEEE80211_STA_DISABLE_HE |
+			      IEEE80211_STA_DISABLE_EHT;
 			break;
 		}
 
@@ -350,7 +356,11 @@ out:
 
 	if (!he_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
 						 IEEE80211_CHAN_NO_HE))
-		ret |= IEEE80211_STA_DISABLE_HE;
+		ret |= IEEE80211_STA_DISABLE_HE | IEEE80211_STA_DISABLE_EHT;
+
+	if (!eht_oper || !cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
+						  IEEE80211_CHAN_NO_EHT))
+		ret |= IEEE80211_STA_DISABLE_EHT;
 
 	if (chandef->width != vht_chandef.width && !tracking)
 		sdata_info(sdata,
@@ -367,6 +377,7 @@ static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 			       const struct ieee80211_ht_operation *ht_oper,
 			       const struct ieee80211_vht_operation *vht_oper,
 			       const struct ieee80211_he_operation *he_oper,
+			       const struct ieee80211_eht_operation *eht_oper,
 			       const struct ieee80211_s1g_oper_ie *s1g_oper,
 			       const u8 *bssid, u32 *changed)
 {
@@ -392,9 +403,16 @@ static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 	/* don't check HE if we associated as non-HE station */
 	if (ifmgd->flags & IEEE80211_STA_DISABLE_HE ||
 	    !ieee80211_get_he_iftype_cap(sband,
-					 ieee80211_vif_type_p2p(&sdata->vif)))
-
+					 ieee80211_vif_type_p2p(&sdata->vif))) {
 		he_oper = NULL;
+		eht_oper = NULL;
+	}
+
+	/* don't check EHT if we associated as non-EHT station */
+	if (ifmgd->flags & IEEE80211_STA_DISABLE_EHT ||
+	    !ieee80211_get_eht_iftype_cap(sband,
+					 ieee80211_vif_type_p2p(&sdata->vif)))
+		eht_oper = NULL;
 
 	if (WARN_ON_ONCE(!sta))
 		return -EINVAL;
@@ -414,7 +432,8 @@ static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 
 	/* calculate new channel (type) based on HT/VHT/HE operation IEs */
 	flags = ieee80211_determine_chantype(sdata, sband, chan, vht_cap_info,
-					     ht_oper, vht_oper, he_oper,
+					     ht_oper, vht_oper,
+					     he_oper, eht_oper,
 					     s1g_oper, &chandef, true);
 
 	/*
@@ -448,9 +467,11 @@ static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
 	if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
 				      IEEE80211_STA_DISABLE_VHT |
 				      IEEE80211_STA_DISABLE_HE |
+				      IEEE80211_STA_DISABLE_EHT |
 				      IEEE80211_STA_DISABLE_40MHZ |
 				      IEEE80211_STA_DISABLE_80P80MHZ |
-				      IEEE80211_STA_DISABLE_160MHZ)) ||
+				      IEEE80211_STA_DISABLE_160MHZ |
+				      IEEE80211_STA_DISABLE_320MHZ)) ||
 	    !cfg80211_chandef_valid(&chandef)) {
 		sdata_info(sdata,
 			   "AP %pM changed caps/bw in a way we can't support (0x%x/0x%x) - disconnect\n",
@@ -636,7 +657,7 @@ static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
 				struct sk_buff *skb,
 				struct ieee80211_supported_band *sband)
 {
-	u8 *pos;
+	u8 *pos, *pre_he_pos;
 	const struct ieee80211_sta_he_cap *he_cap = NULL;
 	struct ieee80211_chanctx_conf *chanctx_conf;
 	u8 he_cap_size;
@@ -653,20 +674,67 @@ static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
 
 	he_cap = ieee80211_get_he_iftype_cap(sband,
 					     ieee80211_vif_type_p2p(&sdata->vif));
-	if (!he_cap || !reg_cap)
+	if (!he_cap || !chanctx_conf || !reg_cap)
 		return;
 
+	/* get a max size estimate */
 	he_cap_size =
 		2 + 1 + sizeof(he_cap->he_cap_elem) +
 		ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
 		ieee80211_he_ppe_size(he_cap->ppe_thres[0],
 				      he_cap->he_cap_elem.phy_cap_info);
 	pos = skb_put(skb, he_cap_size);
-	ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size);
+	pre_he_pos = pos;
+	pos = ieee80211_ie_build_he_cap(sdata->u.mgd.flags,
+					pos, he_cap, pos + he_cap_size);
+	/* trim excess if any */
+	skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos));
 
 	ieee80211_ie_build_he_6ghz_cap(sdata, skb);
 }
 
+static void ieee80211_add_eht_ie(struct ieee80211_sub_if_data *sdata,
+				 struct sk_buff *skb,
+				 struct ieee80211_supported_band *sband)
+{
+	u8 *pos;
+	const struct ieee80211_sta_he_cap *he_cap;
+	const struct ieee80211_sta_eht_cap *eht_cap;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	u8 eht_cap_size;
+	bool reg_cap = false;
+
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	if (!WARN_ON_ONCE(!chanctx_conf))
+		reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy,
+						  &chanctx_conf->def,
+						  IEEE80211_CHAN_NO_HE |
+						  IEEE80211_CHAN_NO_EHT);
+	rcu_read_unlock();
+
+	he_cap = ieee80211_get_he_iftype_cap(sband,
+					     ieee80211_vif_type_p2p(&sdata->vif));
+	eht_cap = ieee80211_get_eht_iftype_cap(sband,
+					       ieee80211_vif_type_p2p(&sdata->vif));
+
+	/*
+	 * EHT capabilities element is only added if the HE capabilities element
+	 * was added so assume that 'he_cap' is valid and don't check it.
+	 */
+	if (WARN_ON(!he_cap || !eht_cap || !reg_cap))
+		return;
+
+	eht_cap_size =
+		2 + 1 + sizeof(eht_cap->eht_cap_elem) +
+		ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
+					   &eht_cap->eht_cap_elem) +
+		ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
+				       eht_cap->eht_cap_elem.phy_cap_info);
+	pos = skb_put(skb, eht_cap_size);
+	ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, pos + eht_cap_size);
+}
+
 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
 {
 	struct ieee80211_local *local = sdata->local;
@@ -987,17 +1055,22 @@ skip_rates:
 				     &assoc_data->ap_vht_cap);
 
 	/*
-	 * If AP doesn't support HT, mark HE as disabled.
+	 * If AP doesn't support HT, mark HE and EHT as disabled.
 	 * If on the 5GHz band, make sure it supports VHT.
 	 */
 	if (ifmgd->flags & IEEE80211_STA_DISABLE_HT ||
 	    (sband->band == NL80211_BAND_5GHZ &&
 	     ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
-		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
+		ifmgd->flags |= IEEE80211_STA_DISABLE_HE |
+			        IEEE80211_STA_DISABLE_EHT;
 
-	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
+	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
 		ieee80211_add_he_ie(sdata, skb, sband);
 
+		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_EHT))
+			ieee80211_add_eht_ie(sdata, skb, sband);
+	}
+
 	/* if present, add any custom non-vendor IEs that go after HE */
 	if (assoc_data->ie_len) {
 		noffset = ieee80211_ie_split_vendor(assoc_data->ie,
@@ -3524,10 +3597,25 @@ static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
 			bss_conf->twt_protected = false;
 
 		changed |= ieee80211_recalc_twt_req(sdata, sta, elems);
+
+		if (elems->eht_operation && elems->eht_cap &&
+		    !(ifmgd->flags & IEEE80211_STA_DISABLE_EHT)) {
+			ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband,
+							    elems->he_cap,
+							    elems->he_cap_len,
+							    elems->eht_cap,
+							    elems->eht_cap_len,
+							    sta);
+
+			bss_conf->eht_support = sta->sta.eht_cap.has_eht;
+		} else {
+			bss_conf->eht_support = false;
+		}
 	} else {
 		bss_conf->he_support = false;
 		bss_conf->twt_requester = false;
 		bss_conf->twt_protected = false;
+		bss_conf->eht_support = false;
 	}
 
 	bss_conf->twt_broadcast =
@@ -4271,6 +4359,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
 	if (ieee80211_config_bw(sdata, sta, elems->ht_cap_elem,
 				elems->vht_cap_elem, elems->ht_operation,
 				elems->vht_operation, elems->he_operation,
+				elems->eht_operation,
 				elems->s1g_oper, bssid, &changed)) {
 		mutex_unlock(&local->sta_mtx);
 		sdata_info(sdata,
@@ -4845,6 +4934,7 @@ void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
 
 	sdata_unlock(sdata);
 }
+#endif
 
 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
 {
@@ -4866,9 +4956,20 @@ void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
 		sdata_unlock(sdata);
 		return;
 	}
+
+	if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) {
+		sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART;
+		mlme_dbg(sdata, "driver requested disconnect after hardware restart\n");
+		ieee80211_sta_connection_lost(sdata,
+					      ifmgd->associated->bssid,
+					      WLAN_REASON_UNSPECIFIED,
+					      true);
+		sdata_unlock(sdata);
+		return;
+	}
+
 	sdata_unlock(sdata);
 }
-#endif
 
 /* interface setup */
 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
@@ -4923,13 +5024,20 @@ void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
 	rcu_read_unlock();
 }
 
-static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
-				     struct cfg80211_bss *cbss)
+static u8 ieee80211_max_rx_chains(struct ieee80211_sub_if_data *sdata,
+				  struct cfg80211_bss *cbss)
 {
+	struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 	const struct element *ht_cap_elem, *vht_cap_elem;
+	const struct cfg80211_bss_ies *ies;
 	const struct ieee80211_ht_cap *ht_cap;
 	const struct ieee80211_vht_cap *vht_cap;
+	const struct ieee80211_he_cap_elem *he_cap;
+	const struct element *he_cap_elem;
+	u16 mcs_80_map, mcs_160_map;
+	int i, mcs_nss_size;
+	bool support_160;
 	u8 chains = 1;
 
 	if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
@@ -4964,10 +5072,156 @@ static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
 		chains = max(chains, nss);
 	}
 
+	if (ifmgd->flags & IEEE80211_STA_DISABLE_HE)
+		return chains;
+
+	ies = rcu_dereference(cbss->ies);
+	he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY,
+					     ies->data, ies->len);
+
+	if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap))
+		return chains;
+
+	/* skip one byte ext_tag_id */
+	he_cap = (void *)(he_cap_elem->data + 1);
+	mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);
+
+	/* invalid HE IE */
+	if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap))
+		return chains;
+
+	/* mcs_nss is right after he_cap info */
+	he_mcs_nss_supp = (void *)(he_cap + 1);
+
+	mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
+
+	for (i = 7; i >= 0; i--) {
+		u8 mcs_80 = mcs_80_map >> (2 * i) & 3;
+
+		if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
+			chains = max_t(u8, chains, i + 1);
+			break;
+		}
+	}
+
+	support_160 = he_cap->phy_cap_info[0] &
+		      IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
+
+	if (!support_160)
+		return chains;
+
+	mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160);
+	for (i = 7; i >= 0; i--) {
+		u8 mcs_160 = mcs_160_map >> (2 * i) & 3;
+
+		if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
+			chains = max_t(u8, chains, i + 1);
+			break;
+		}
+	}
+
 	return chains;
 }
 
 static bool
+ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata,
+				     const struct cfg80211_bss_ies *ies,
+				     const struct ieee80211_he_operation *he_op)
+{
+	const struct element *he_cap_elem;
+	const struct ieee80211_he_cap_elem *he_cap;
+	struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
+	u16 mcs_80_map_tx, mcs_80_map_rx;
+	u16 ap_min_req_set;
+	int mcs_nss_size;
+	int nss;
+
+	he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY,
+					     ies->data, ies->len);
+
+	/* invalid HE IE */
+	if (!he_cap_elem || he_cap_elem->datalen < 1 + sizeof(*he_cap)) {
+		sdata_info(sdata,
+			   "Invalid HE elem, Disable HE\n");
+		return false;
+	}
+
+	/* skip one byte ext_tag_id */
+	he_cap = (void *)(he_cap_elem->data + 1);
+	mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);
+
+	/* invalid HE IE */
+	if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) {
+		sdata_info(sdata,
+			   "Invalid HE elem with nss size, Disable HE\n");
+		return false;
+	}
+
+	/* mcs_nss is right after he_cap info */
+	he_mcs_nss_supp = (void *)(he_cap + 1);
+
+	mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
+	mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80);
+
+	/* P802.11-REVme/D0.3
+	 * 27.1.1 Introduction to the HE PHY
+	 * ...
+	 * An HE STA shall support the following features:
+	 * ...
+	 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all
+	 * supported channel widths for HE SU PPDUs
+	 */
+	if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED ||
+	    (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) {
+		sdata_info(sdata,
+			   "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n",
+			   mcs_80_map_tx, mcs_80_map_rx);
+		return false;
+	}
+
+	if (!he_op)
+		return true;
+
+	ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
+
+	/* make sure the AP is consistent with itself
+	 *
+	 * P802.11-REVme/D0.3
+	 * 26.17.1 Basic HE BSS operation
+	 *
+	 * A STA that is operating in an HE BSS shall be able to receive and
+	 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the
+	 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the
+	 * MLME-START.request primitive and shall be able to receive at each of
+	 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and
+	 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request
+	 * primitive
+	 */
+	for (nss = 8; nss > 0; nss--) {
+		u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
+		u8 ap_rx_val;
+		u8 ap_tx_val;
+
+		if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
+			continue;
+
+		ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3;
+		ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3;
+
+		if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
+		    ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
+		    ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) {
+			sdata_info(sdata,
+				   "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n",
+				   nss, ap_rx_val, ap_rx_val, ap_op_val);
+			return false;
+		}
+	}
+
+	return true;
+}
+
+static bool
 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata,
 				    struct ieee80211_supported_band *sband,
 				    const struct ieee80211_he_operation *he_op)
@@ -5013,7 +5267,15 @@ ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata,
 
 			/*
 			 * Make sure the HE AP doesn't require MCSs that aren't
-			 * supported by the client
+			 * supported by the client as required by spec
+			 *
+			 * P802.11-REVme/D0.3
+			 * 26.17.1 Basic HE BSS operation
+			 *
+			 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive)
+			 * a BSS, unless it supports (i.e., is able to both transmit and
+			 * receive using) all of the <HE-MCS, NSS> tuples in the basic
+			 * HE-MCS and NSS set.
 			 */
 			if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
 			    sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
@@ -5040,6 +5302,7 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 	const struct ieee80211_ht_operation *ht_oper = NULL;
 	const struct ieee80211_vht_operation *vht_oper = NULL;
 	const struct ieee80211_he_operation *he_oper = NULL;
+	const struct ieee80211_eht_operation *eht_oper = NULL;
 	const struct ieee80211_s1g_oper_ie *s1g_oper = NULL;
 	struct ieee80211_supported_band *sband;
 	struct cfg80211_chan_def chandef;
@@ -5070,22 +5333,31 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 
 	/* disable HT/VHT/HE if we don't support them */
 	if (!sband->ht_cap.ht_supported && !is_6ghz) {
-		mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE\n");
+		mlme_dbg(sdata, "HT not supported, disabling HT/VHT/HE/EHT\n");
 		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
 		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
+		ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
 	}
 
 	if (!sband->vht_cap.vht_supported && is_5ghz) {
-		mlme_dbg(sdata, "VHT not supported, disabling VHT/HE\n");
+		mlme_dbg(sdata, "VHT not supported, disabling VHT/HE/EHT\n");
 		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
+		ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
 	}
 
 	if (!ieee80211_get_he_iftype_cap(sband,
 					 ieee80211_vif_type_p2p(&sdata->vif))) {
-		mlme_dbg(sdata, "HE not supported, disabling it\n");
+		mlme_dbg(sdata, "HE not supported, disabling HE and EHT\n");
 		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
+		ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
+	}
+
+	if (!ieee80211_get_eht_iftype_cap(sband,
+					  ieee80211_vif_type_p2p(&sdata->vif))) {
+		mlme_dbg(sdata, "EHT not supported, disabling EHT\n");
+		ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
 	}
 
 	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) {
@@ -5107,6 +5379,7 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
 			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 			ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
+			ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
 		}
 
 		if (!elems->vht_cap_elem) {
@@ -5144,8 +5417,31 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 			}
 		}
 
-		if (!ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper))
-			ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
+		if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) ||
+		    !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper))
+			ifmgd->flags |= IEEE80211_STA_DISABLE_HE |
+				        IEEE80211_STA_DISABLE_EHT;
+	}
+
+	/*
+	 * EHT requires HE to be supported as well. Specifically for 6 GHz
+	 * channels, the operation channel information can only be deduced from
+	 * both the 6 GHz operation information (from the HE operation IE) and
+	 * EHT operation.
+	 */
+	if (!(ifmgd->flags & (IEEE80211_STA_DISABLE_HE |
+			      IEEE80211_STA_DISABLE_EHT)) && he_oper) {
+		const struct cfg80211_bss_ies *ies;
+		const u8 *eht_oper_ie;
+
+		ies = rcu_dereference(cbss->ies);
+		eht_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_EHT_OPERATION,
+						   ies->data, ies->len);
+		if (eht_oper_ie && eht_oper_ie[1] >=
+		    1 + sizeof(struct ieee80211_eht_operation))
+			eht_oper = (void *)(eht_oper_ie + 3);
+		else
+			eht_oper = NULL;
 	}
 
 	/* Allow VHT if at least one channel on the sband supports 80 MHz */
@@ -5174,11 +5470,12 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 	ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
 						     cbss->channel,
 						     bss->vht_cap_info,
-						     ht_oper, vht_oper, he_oper,
+						     ht_oper, vht_oper,
+						     he_oper, eht_oper,
 						     s1g_oper,
 						     &chandef, false);
 
-	sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
+	sdata->needed_rx_chains = min(ieee80211_max_rx_chains(sdata, cbss),
 				      local->rx_chains);
 
 	rcu_read_unlock();
@@ -5665,6 +5962,7 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
 			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
 			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 			ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
+			ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
 			netdev_info(sdata->dev,
 				    "disabling HT/VHT/HE due to WEP/TKIP use\n");
 		}
@@ -5672,11 +5970,12 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
 
 	sband = local->hw.wiphy->bands[req->bss->channel->band];
 
-	/* also disable HT/VHT/HE if the AP doesn't use WMM */
+	/* also disable HT/VHT/HE/EHT if the AP doesn't use WMM */
 	if (!bss->wmm_used) {
 		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
 		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
+		ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
 		netdev_info(sdata->dev,
 			    "disabling HT/VHT/HE as WMM/QoS is not supported by the AP\n");
 	}
@@ -5730,9 +6029,11 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
 		memcpy(&assoc_data->ap_vht_cap, vht_elem->data,
 		       sizeof(struct ieee80211_vht_cap));
 	} else if (is_5ghz) {
-		sdata_info(sdata, "VHT capa missing/short, disabling VHT/HE\n");
+		sdata_info(sdata,
+			   "VHT capa missing/short, disabling VHT/HE/EHT\n");
 		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT |
-				IEEE80211_STA_DISABLE_HE;
+				IEEE80211_STA_DISABLE_HE |
+				IEEE80211_STA_DISABLE_EHT;
 	}
 	rcu_read_unlock();
 
@@ -5811,6 +6112,7 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
 		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
 		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
+		ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
 	}
 
 	if (req->flags & ASSOC_REQ_DISABLE_VHT) {
@@ -5819,8 +6121,9 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
 	}
 
 	if (req->flags & ASSOC_REQ_DISABLE_HE) {
-		mlme_dbg(sdata, "HE disabled by flag, disabling VHT\n");
+		mlme_dbg(sdata, "HE disabled by flag, disabling HE/EHT\n");
 		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
+		ifmgd->flags |= IEEE80211_STA_DISABLE_EHT;
 	}
 
 	err = ieee80211_prep_connection(sdata, req->bss, true, override);
diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c
index 9c3b7fc377c1..9c6ace858107 100644
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2010-2013 Felix Fietkau <nbd@openwrt.org>
- * Copyright (C) 2019-2020 Intel Corporation
+ * Copyright (C) 2019-2021 Intel Corporation
  */
 #include <linux/netdevice.h>
 #include <linux/types.h>
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 48d9553dafe3..beb6b92eb780 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -4625,6 +4625,8 @@ static bool ieee80211_invoke_fast_rx(struct ieee80211_rx_data *rx,
 	/* do the header conversion - first grab the addresses */
 	ether_addr_copy(addrs.da, skb->data + fast_rx->da_offs);
 	ether_addr_copy(addrs.sa, skb->data + fast_rx->sa_offs);
+	skb_postpull_rcsum(skb, skb->data + snap_offs,
+			   sizeof(rfc1042_header) + 2);
 	/* remove the SNAP but leave the ethertype */
 	skb_pull(skb, snap_offs + sizeof(rfc1042_header));
 	/* push the addresses in front */
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 537535a88990..91fbb1ee5c38 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -364,8 +364,7 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
 			goto free;
 		sta->mesh->plink_sta = sta;
 		spin_lock_init(&sta->mesh->plink_lock);
-		if (ieee80211_vif_is_mesh(&sdata->vif) &&
-		    !sdata->u.mesh.user_mpm)
+		if (!sdata->u.mesh.user_mpm)
 			timer_setup(&sta->mesh->plink_timer, mesh_plink_timer,
 				    0);
 		sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
diff --git a/net/mac80211/status.c b/net/mac80211/status.c
index f6f63a0b1b72..e81e8a5bb774 100644
--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -5,6 +5,7 @@
  * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
  * Copyright 2008-2010	Johannes Berg <johannes@sipsolutions.net>
  * Copyright 2013-2014  Intel Mobile Communications GmbH
+ * Copyright 2021-2022  Intel Corporation
  */
 
 #include <linux/export.h>
@@ -628,6 +629,8 @@ static void ieee80211_report_ack_skb(struct ieee80211_local *local,
 		u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie;
 		struct ieee80211_sub_if_data *sdata;
 		struct ieee80211_hdr *hdr = (void *)skb->data;
+		bool is_valid_ack_signal =
+			!!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID);
 
 		rcu_read_lock();
 		sdata = ieee80211_sdata_from_skb(local, skb);
@@ -644,7 +647,7 @@ static void ieee80211_report_ack_skb(struct ieee80211_local *local,
 				cfg80211_probe_status(sdata->dev, hdr->addr1,
 						      cookie, acked,
 						      info->status.ack_signal,
-						      info->status.is_valid_ack_signal,
+						      is_valid_ack_signal,
 						      GFP_ATOMIC);
 			else if (ieee80211_is_mgmt(hdr->frame_control))
 				cfg80211_mgmt_tx_status(&sdata->wdev, cookie,
@@ -754,7 +757,6 @@ static void ieee80211_report_used_skb(struct ieee80211_local *local,
  */
 #define STA_LOST_PKT_THRESHOLD	50
 #define STA_LOST_PKT_TIME	HZ		/* 1 sec since last ACK */
-#define STA_LOST_TDLS_PKT_THRESHOLD	10
 #define STA_LOST_TDLS_PKT_TIME		(10*HZ) /* 10secs since last ACK */
 
 static void ieee80211_lost_packet(struct sta_info *sta,
@@ -781,7 +783,7 @@ static void ieee80211_lost_packet(struct sta_info *sta,
 	}
 
 	/*
-	 * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD
+	 * If we're in TDLS mode, make sure that all STA_LOST_PKT_THRESHOLD
 	 * of the last packets were lost, and that no ACK was received in the
 	 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
 	 * mechanism.
@@ -1102,7 +1104,7 @@ void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
 	struct ieee80211_supported_band *sband;
 	struct sta_info *sta = NULL;
 	int rates_idx, retry_count;
-	bool acked, noack_success;
+	bool acked, noack_success, ack_signal_valid;
 	u16 tx_time_est;
 
 	if (pubsta) {
@@ -1133,6 +1135,8 @@ void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
 
 	acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
 	noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);
+	ack_signal_valid =
+		!!(info->status.flags & IEEE80211_TX_STATUS_ACK_SIGNAL_VALID);
 
 	if (pubsta) {
 		struct ieee80211_sub_if_data *sdata = sta->sdata;
@@ -1161,7 +1165,7 @@ void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
 				    unlikely(sdata->u.mgd.probe_send_count > 0))
 					sdata->u.mgd.probe_send_count = 0;
 
-				if (info->status.is_valid_ack_signal) {
+				if (ack_signal_valid) {
 					sta->status_stats.last_ack_signal =
 							 (s8)info->status.ack_signal;
 					sta->status_stats.ack_signal_filled = true;
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 6d054fed062f..b6b20f38de0e 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -5042,6 +5042,19 @@ ieee80211_beacon_get_finish(struct ieee80211_hw *hw,
 		       IEEE80211_TX_CTL_FIRST_FRAGMENT;
 }
 
+static void
+ieee80211_beacon_add_mbssid(struct sk_buff *skb, struct beacon_data *beacon)
+{
+	int i;
+
+	if (!beacon->mbssid_ies)
+		return;
+
+	for (i = 0; i < beacon->mbssid_ies->cnt; i++)
+		skb_put_data(skb, beacon->mbssid_ies->elem[i].data,
+			     beacon->mbssid_ies->elem[i].len);
+}
+
 static struct sk_buff *
 ieee80211_beacon_get_ap(struct ieee80211_hw *hw,
 			struct ieee80211_vif *vif,
@@ -5055,6 +5068,7 @@ ieee80211_beacon_get_ap(struct ieee80211_hw *hw,
 	struct ieee80211_if_ap *ap = &sdata->u.ap;
 	struct sk_buff *skb = NULL;
 	u16 csa_off_base = 0;
+	int mbssid_len;
 
 	if (beacon->cntdwn_counter_offsets[0]) {
 		if (!is_template)
@@ -5064,11 +5078,12 @@ ieee80211_beacon_get_ap(struct ieee80211_hw *hw,
 	}
 
 	/* headroom, head length,
-	 * tail length and maximum TIM length
+	 * tail length, maximum TIM length and multiple BSSID length
 	 */
+	mbssid_len = ieee80211_get_mbssid_beacon_len(beacon->mbssid_ies);
 	skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
 			    beacon->tail_len + 256 +
-			    local->hw.extra_beacon_tailroom);
+			    local->hw.extra_beacon_tailroom + mbssid_len);
 	if (!skb)
 		return NULL;
 
@@ -5082,6 +5097,11 @@ ieee80211_beacon_get_ap(struct ieee80211_hw *hw,
 		offs->tim_length = skb->len - beacon->head_len;
 		offs->cntdwn_counter_offs[0] = beacon->cntdwn_counter_offsets[0];
 
+		if (mbssid_len) {
+			ieee80211_beacon_add_mbssid(skb, beacon);
+			offs->mbssid_off = skb->len - mbssid_len;
+		}
+
 		/* for AP the csa offsets are from tail */
 		csa_off_base = skb->len;
 	}
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index f71b042a5c8b..682a164f795a 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -973,8 +973,10 @@ static void ieee80211_parse_extension_element(u32 *crc,
 		}
 		break;
 	case WLAN_EID_EXT_HE_CAPABILITY:
-		elems->he_cap = data;
-		elems->he_cap_len = len;
+		if (ieee80211_he_capa_size_ok(data, len)) {
+			elems->he_cap = data;
+			elems->he_cap_len = len;
+		}
 		break;
 	case WLAN_EID_EXT_HE_OPERATION:
 		if (len >= sizeof(*elems->he_operation) &&
@@ -1006,6 +1008,17 @@ static void ieee80211_parse_extension_element(u32 *crc,
 		if (len >= sizeof(*elems->he_6ghz_capa))
 			elems->he_6ghz_capa = data;
 		break;
+	case WLAN_EID_EXT_EHT_CAPABILITY:
+		if (ieee80211_eht_capa_size_ok(elems->he_cap,
+					       data, len)) {
+			elems->eht_cap = data;
+			elems->eht_cap_len = len;
+		}
+		break;
+	case WLAN_EID_EXT_EHT_OPERATION:
+		if (ieee80211_eht_oper_size_ok(data, len))
+			elems->eht_operation = data;
+		break;
 	}
 }
 
@@ -1799,6 +1812,7 @@ static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
 	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_supported_band *sband;
 	const struct ieee80211_sta_he_cap *he_cap;
+	const struct ieee80211_sta_eht_cap *eht_cap;
 	u8 *pos = buffer, *end = buffer + buffer_len;
 	size_t noffset;
 	int supp_rates_len, i;
@@ -1974,7 +1988,19 @@ static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
 	if (he_cap &&
 	    cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
 					 IEEE80211_CHAN_NO_HE)) {
-		pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
+		pos = ieee80211_ie_build_he_cap(0, pos, he_cap, end);
+		if (!pos)
+			goto out_err;
+	}
+
+	eht_cap = ieee80211_get_eht_iftype_cap(sband,
+					       ieee80211_vif_type_p2p(&sdata->vif));
+
+	if (eht_cap &&
+	    cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
+					 IEEE80211_CHAN_NO_HE |
+					 IEEE80211_CHAN_NO_EHT)) {
+		pos = ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, end);
 		if (!pos)
 			goto out_err;
 	}
@@ -2321,6 +2347,7 @@ int ieee80211_reconfig(struct ieee80211_local *local)
 	struct cfg80211_sched_scan_request *sched_scan_req;
 	bool sched_scan_stopped = false;
 	bool suspended = local->suspended;
+	bool in_reconfig = false;
 
 	/* nothing to do if HW shouldn't run */
 	if (!local->open_count)
@@ -2672,6 +2699,7 @@ int ieee80211_reconfig(struct ieee80211_local *local)
 		drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
 
 	if (local->in_reconfig) {
+		in_reconfig = local->in_reconfig;
 		local->in_reconfig = false;
 		barrier();
 
@@ -2689,6 +2717,15 @@ int ieee80211_reconfig(struct ieee80211_local *local)
 					IEEE80211_QUEUE_STOP_REASON_SUSPEND,
 					false);
 
+	if (in_reconfig) {
+		list_for_each_entry(sdata, &local->interfaces, list) {
+			if (!ieee80211_sdata_running(sdata))
+				continue;
+			if (sdata->vif.type == NL80211_IFTYPE_STATION)
+				ieee80211_sta_restart(sdata);
+		}
+	}
+
 	if (!suspended)
 		return 0;
 
@@ -2718,7 +2755,7 @@ int ieee80211_reconfig(struct ieee80211_local *local)
 	return 0;
 }
 
-void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
+static void ieee80211_reconfig_disconnect(struct ieee80211_vif *vif, u8 flag)
 {
 	struct ieee80211_sub_if_data *sdata;
 	struct ieee80211_local *local;
@@ -2730,19 +2767,35 @@ void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
 	sdata = vif_to_sdata(vif);
 	local = sdata->local;
 
-	if (WARN_ON(!local->resuming))
+	if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_RESUME &&
+		    !local->resuming))
+		return;
+
+	if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_HW_RESTART &&
+		    !local->in_reconfig))
 		return;
 
 	if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
 		return;
 
-	sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
+	sdata->flags |= flag;
 
 	mutex_lock(&local->key_mtx);
 	list_for_each_entry(key, &sdata->key_list, list)
 		key->flags |= KEY_FLAG_TAINTED;
 	mutex_unlock(&local->key_mtx);
 }
+
+void ieee80211_hw_restart_disconnect(struct ieee80211_vif *vif)
+{
+	ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_HW_RESTART);
+}
+EXPORT_SYMBOL_GPL(ieee80211_hw_restart_disconnect);
+
+void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
+{
+	ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_RESUME);
+}
 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
 
 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
@@ -2918,10 +2971,11 @@ u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
 				     he_cap->he_cap_elem.phy_cap_info);
 }
 
-u8 *ieee80211_ie_build_he_cap(u8 *pos,
+u8 *ieee80211_ie_build_he_cap(u32 disable_flags, u8 *pos,
 			      const struct ieee80211_sta_he_cap *he_cap,
 			      u8 *end)
 {
+	struct ieee80211_he_cap_elem elem;
 	u8 n;
 	u8 ie_len;
 	u8 *orig_pos = pos;
@@ -2934,7 +2988,23 @@ u8 *ieee80211_ie_build_he_cap(u8 *pos,
 	if (!he_cap)
 		return orig_pos;
 
-	n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
+	/* modify on stack first to calculate 'n' and 'ie_len' correctly */
+	elem = he_cap->he_cap_elem;
+
+	if (disable_flags & IEEE80211_STA_DISABLE_40MHZ)
+		elem.phy_cap_info[0] &=
+			~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
+			  IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G);
+
+	if (disable_flags & IEEE80211_STA_DISABLE_160MHZ)
+		elem.phy_cap_info[0] &=
+			~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
+
+	if (disable_flags & IEEE80211_STA_DISABLE_80P80MHZ)
+		elem.phy_cap_info[0] &=
+			~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
+
+	n = ieee80211_he_mcs_nss_size(&elem);
 	ie_len = 2 + 1 +
 		 sizeof(he_cap->he_cap_elem) + n +
 		 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
@@ -2948,8 +3018,8 @@ u8 *ieee80211_ie_build_he_cap(u8 *pos,
 	*pos++ = WLAN_EID_EXT_HE_CAPABILITY;
 
 	/* Fixed data */
-	memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
-	pos += sizeof(he_cap->he_cap_elem);
+	memcpy(pos, &elem, sizeof(elem));
+	pos += sizeof(elem);
 
 	memcpy(pos, &he_cap->he_mcs_nss_supp, n);
 	pos += n;
@@ -3056,6 +3126,10 @@ u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
 		else
 			ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
 		break;
+	case NL80211_CHAN_WIDTH_320:
+		/* HT information element should not be included on 6GHz */
+		WARN_ON(1);
+		return pos;
 	default:
 		ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
 		break;
@@ -3095,6 +3169,10 @@ void ieee80211_ie_build_wide_bw_cs(u8 *pos,
 	case NL80211_CHAN_WIDTH_80P80:
 		*pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
 		break;
+	case NL80211_CHAN_WIDTH_320:
+		/* The behavior is not defined for 320 MHz channels */
+		WARN_ON(1);
+		fallthrough;
 	default:
 		*pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
 	}
@@ -3147,6 +3225,10 @@ u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
 	case NL80211_CHAN_WIDTH_80:
 		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
 		break;
+	case NL80211_CHAN_WIDTH_320:
+		/* VHT information element should not be included on 6GHz */
+		WARN_ON(1);
+		return pos;
 	default:
 		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
 		break;
@@ -3207,6 +3289,13 @@ u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
 		he_6ghz_op->ccfs1 = 0;
 
 	switch (chandef->width) {
+	case NL80211_CHAN_WIDTH_320:
+		/*
+		 * TODO: mesh operation is not defined over 6GHz 320 MHz
+		 * channels.
+		 */
+		WARN_ON(1);
+		break;
 	case NL80211_CHAN_WIDTH_160:
 		/* Convert 160 MHz channel width to new style as interop
 		 * workaround.
@@ -3262,7 +3351,6 @@ bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
 		channel_type = NL80211_CHAN_HT40MINUS;
 		break;
 	default:
-		channel_type = NL80211_CHAN_NO_HT;
 		return false;
 	}
 
@@ -3396,17 +3484,19 @@ bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
 
 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
 				    const struct ieee80211_he_operation *he_oper,
+				    const struct ieee80211_eht_operation *eht_oper,
 				    struct cfg80211_chan_def *chandef)
 {
 	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_supported_band *sband;
 	enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
 	const struct ieee80211_sta_he_cap *he_cap;
+	const struct ieee80211_sta_eht_cap *eht_cap;
 	struct cfg80211_chan_def he_chandef = *chandef;
 	const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
 	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
-	bool support_80_80, support_160;
-	u8 he_phy_cap;
+	bool support_80_80, support_160, support_320;
+	u8 he_phy_cap, eht_phy_cap;
 	u32 freq;
 
 	if (chandef->chan->band != NL80211_BAND_6GHZ)
@@ -3435,6 +3525,12 @@ bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
 		return false;
 	}
 
+	eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype);
+	if (!eht_cap) {
+		sdata_info(sdata, "Missing iftype sband data/EHT cap");
+		eht_oper = NULL;
+	}
+
 	he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
 
 	if (!he_6ghz_oper) {
@@ -3444,6 +3540,11 @@ bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
 		return false;
 	}
 
+	/*
+	 * The EHT operation IE does not contain the primary channel so the
+	 * primary channel frequency should be taken from the 6 GHz operation
+	 * information.
+	 */
 	freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
 					      NL80211_BAND_6GHZ);
 	he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
@@ -3461,43 +3562,80 @@ bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
 		break;
 	}
 
-	switch (u8_get_bits(he_6ghz_oper->control,
-			    IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
-	case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
-		he_chandef.width = NL80211_CHAN_WIDTH_20;
-		break;
-	case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
-		he_chandef.width = NL80211_CHAN_WIDTH_40;
-		break;
-	case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
-		he_chandef.width = NL80211_CHAN_WIDTH_80;
-		break;
-	case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
-		he_chandef.width = NL80211_CHAN_WIDTH_80;
-		if (!he_6ghz_oper->ccfs1)
+	if (!eht_oper) {
+		switch (u8_get_bits(he_6ghz_oper->control,
+				    IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
+		case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
+			he_chandef.width = NL80211_CHAN_WIDTH_20;
+			break;
+		case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
+			he_chandef.width = NL80211_CHAN_WIDTH_40;
+			break;
+		case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
+			he_chandef.width = NL80211_CHAN_WIDTH_80;
+			break;
+		case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
+			he_chandef.width = NL80211_CHAN_WIDTH_80;
+			if (!he_6ghz_oper->ccfs1)
+				break;
+			if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
+				if (support_160)
+					he_chandef.width = NL80211_CHAN_WIDTH_160;
+			} else {
+				if (support_80_80)
+					he_chandef.width = NL80211_CHAN_WIDTH_80P80;
+			}
+			break;
+		}
+
+		if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
+			he_chandef.center_freq1 =
+				ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
+							       NL80211_BAND_6GHZ);
+		} else {
+			he_chandef.center_freq1 =
+				ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
+							       NL80211_BAND_6GHZ);
+			if (support_80_80 || support_160)
+				he_chandef.center_freq2 =
+					ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
+								       NL80211_BAND_6GHZ);
+		}
+	} else {
+		eht_phy_cap = eht_cap->eht_cap_elem.phy_cap_info[0];
+		support_320 =
+			eht_phy_cap & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ;
+
+		switch (u8_get_bits(eht_oper->chan_width,
+				    IEEE80211_EHT_OPER_CHAN_WIDTH)) {
+		case IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ:
+			he_chandef.width = NL80211_CHAN_WIDTH_20;
 			break;
-		if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
+		case IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ:
+			he_chandef.width = NL80211_CHAN_WIDTH_40;
+			break;
+		case IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ:
+			he_chandef.width = NL80211_CHAN_WIDTH_80;
+			break;
+		case IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ:
 			if (support_160)
 				he_chandef.width = NL80211_CHAN_WIDTH_160;
-		} else {
-			if (support_80_80)
-				he_chandef.width = NL80211_CHAN_WIDTH_80P80;
+			else
+				he_chandef.width = NL80211_CHAN_WIDTH_80;
+			break;
+		case IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ:
+			if (support_320)
+				he_chandef.width = NL80211_CHAN_WIDTH_320;
+			else if (support_160)
+				he_chandef.width = NL80211_CHAN_WIDTH_160;
+			else
+				he_chandef.width = NL80211_CHAN_WIDTH_80;
+			break;
 		}
-		break;
-	}
 
-	if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
-		he_chandef.center_freq1 =
-			ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
-						       NL80211_BAND_6GHZ);
-	} else {
 		he_chandef.center_freq1 =
-			ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
+			ieee80211_channel_to_frequency(eht_oper->ccfs,
 						       NL80211_BAND_6GHZ);
-		if (support_80_80 || support_160)
-			he_chandef.center_freq2 =
-				ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
-							       NL80211_BAND_6GHZ);
 	}
 
 	if (!cfg80211_chandef_valid(&he_chandef)) {
@@ -3969,6 +4107,15 @@ u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
 		ret = IEEE80211_STA_DISABLE_80P80MHZ |
 		      IEEE80211_STA_DISABLE_160MHZ;
 		break;
+	case NL80211_CHAN_WIDTH_320:
+		/* n_P20 */
+		tmp = (150 + c->chan->center_freq - c->center_freq1) / 20;
+		/* n_P160 */
+		tmp /= 80;
+		c->center_freq1 = c->center_freq1 - 80 + 160 * tmp;
+		c->width = NL80211_CHAN_WIDTH_160;
+		ret = IEEE80211_STA_DISABLE_320MHZ;
+		break;
 	default:
 	case NL80211_CHAN_WIDTH_20_NOHT:
 		WARN_ON_ONCE(1);
@@ -4633,3 +4780,69 @@ u16 ieee80211_encode_usf(int listen_interval)
 
 	return (u16) listen_interval;
 }
+
+u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
+{
+	const struct ieee80211_sta_he_cap *he_cap;
+	const struct ieee80211_sta_eht_cap *eht_cap;
+	struct ieee80211_supported_band *sband;
+	u8 n;
+
+	sband = ieee80211_get_sband(sdata);
+	if (!sband)
+		return 0;
+
+	he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
+	eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype);
+	if (!he_cap || !eht_cap)
+		return 0;
+
+	n = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
+				       &eht_cap->eht_cap_elem);
+	return 2 + 1 +
+	       sizeof(he_cap->he_cap_elem) + n +
+	       ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
+				      eht_cap->eht_cap_elem.phy_cap_info);
+	return 0;
+}
+
+u8 *ieee80211_ie_build_eht_cap(u8 *pos,
+			       const struct ieee80211_sta_he_cap *he_cap,
+			       const struct ieee80211_sta_eht_cap *eht_cap,
+			       u8 *end)
+{
+	u8 mcs_nss_len, ppet_len;
+	u8 ie_len;
+	u8 *orig_pos = pos;
+
+	/* Make sure we have place for the IE */
+	if (!he_cap || !eht_cap)
+		return orig_pos;
+
+	mcs_nss_len = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
+						 &eht_cap->eht_cap_elem);
+	ppet_len = ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
+					  eht_cap->eht_cap_elem.phy_cap_info);
+
+	ie_len = 2 + 1 + sizeof(eht_cap->eht_cap_elem) + mcs_nss_len + ppet_len;
+	if ((end - pos) < ie_len)
+		return orig_pos;
+
+	*pos++ = WLAN_EID_EXTENSION;
+	*pos++ = ie_len - 2;
+	*pos++ = WLAN_EID_EXT_EHT_CAPABILITY;
+
+	/* Fixed data */
+	memcpy(pos, &eht_cap->eht_cap_elem, sizeof(eht_cap->eht_cap_elem));
+	pos += sizeof(eht_cap->eht_cap_elem);
+
+	memcpy(pos, &eht_cap->eht_mcs_nss_supp, mcs_nss_len);
+	pos += mcs_nss_len;
+
+	if (ppet_len) {
+		memcpy(pos, &eht_cap->eht_ppe_thres, ppet_len);
+		pos += ppet_len;
+	}
+
+	return pos;
+}
diff --git a/net/mac80211/vht.c b/net/mac80211/vht.c
index e856f9092137..8f16aa9c725d 100644
--- a/net/mac80211/vht.c
+++ b/net/mac80211/vht.c
@@ -4,7 +4,7 @@
  *
  * Portions of this file
  * Copyright(c) 2015 - 2016 Intel Deutschland GmbH
- * Copyright (C) 2018 - 2020 Intel Corporation
+ * Copyright (C) 2018 - 2021 Intel Corporation
  */
 
 #include <linux/ieee80211.h>
@@ -329,15 +329,27 @@ ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
 	}
 }
 
-/* FIXME: move this to some better location - parses HE now */
+/* FIXME: move this to some better location - parses HE/EHT now */
 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta)
 {
 	struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap;
 	struct ieee80211_sta_he_cap *he_cap = &sta->sta.he_cap;
+	struct ieee80211_sta_eht_cap *eht_cap = &sta->sta.eht_cap;
 	u32 cap_width;
 
 	if (he_cap->has_he) {
-		u8 info = he_cap->he_cap_elem.phy_cap_info[0];
+		u8 info;
+
+		if (eht_cap->has_eht &&
+		    sta->sdata->vif.bss_conf.chandef.chan->band ==
+		    NL80211_BAND_6GHZ) {
+			info = eht_cap->eht_cap_elem.phy_cap_info[0];
+
+			if (info & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)
+				return IEEE80211_STA_RX_BW_320;
+		}
+
+		info = he_cap->he_cap_elem.phy_cap_info[0];
 
 		if (sta->sdata->vif.bss_conf.chandef.chan->band ==
 				NL80211_BAND_2GHZ) {
@@ -445,6 +457,8 @@ ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width)
 	case NL80211_CHAN_WIDTH_160:
 	case NL80211_CHAN_WIDTH_80P80:
 		return IEEE80211_STA_RX_BW_160;
+	case NL80211_CHAN_WIDTH_320:
+		return IEEE80211_STA_RX_BW_320;
 	default:
 		WARN_ON_ONCE(1);
 		return IEEE80211_STA_RX_BW_20;
@@ -483,13 +497,24 @@ enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta)
 
 void ieee80211_sta_set_rx_nss(struct sta_info *sta)
 {
-	u8 ht_rx_nss = 0, vht_rx_nss = 0, he_rx_nss = 0, rx_nss;
+	u8 ht_rx_nss = 0, vht_rx_nss = 0, he_rx_nss = 0, eht_rx_nss = 0, rx_nss;
 	bool support_160;
 
 	/* if we received a notification already don't overwrite it */
 	if (sta->sta.rx_nss)
 		return;
 
+	if (sta->sta.eht_cap.has_eht) {
+		int i;
+		const u8 *rx_nss_mcs = (void *)&sta->sta.eht_cap.eht_mcs_nss_supp;
+
+		/* get the max nss for EHT over all possible bandwidths and mcs */
+		for (i = 0; i < sizeof(struct ieee80211_eht_mcs_nss_supp); i++)
+			eht_rx_nss = max_t(u8, eht_rx_nss,
+					   u8_get_bits(rx_nss_mcs[i],
+						       IEEE80211_EHT_MCS_NSS_RX));
+	}
+
 	if (sta->sta.he_cap.has_he) {
 		int i;
 		u8 rx_mcs_80 = 0, rx_mcs_160 = 0;
@@ -501,7 +526,7 @@ void ieee80211_sta_set_rx_nss(struct sta_info *sta)
 		for (i = 7; i >= 0; i--) {
 			u8 mcs_160 = (mcs_160_map >> (2 * i)) & 3;
 
-			if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
+			if (mcs_160 != IEEE80211_HE_MCS_NOT_SUPPORTED) {
 				rx_mcs_160 = i + 1;
 				break;
 			}
@@ -509,7 +534,7 @@ void ieee80211_sta_set_rx_nss(struct sta_info *sta)
 		for (i = 7; i >= 0; i--) {
 			u8 mcs_80 = (mcs_80_map >> (2 * i)) & 3;
 
-			if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
+			if (mcs_80 != IEEE80211_HE_MCS_NOT_SUPPORTED) {
 				rx_mcs_80 = i + 1;
 				break;
 			}
@@ -555,6 +580,7 @@ void ieee80211_sta_set_rx_nss(struct sta_info *sta)
 
 	rx_nss = max(vht_rx_nss, ht_rx_nss);
 	rx_nss = max(he_rx_nss, rx_nss);
+	rx_nss = max(eht_rx_nss, rx_nss);
 	sta->sta.rx_nss = max_t(u8, 1, rx_nss);
 }
 
diff --git a/net/mctp/af_mctp.c b/net/mctp/af_mctp.c
index c921de63b494..f0702d920d8d 100644
--- a/net/mctp/af_mctp.c
+++ b/net/mctp/af_mctp.c
@@ -6,6 +6,7 @@
  * Copyright (c) 2021 Google
  */
 
+#include <linux/compat.h>
 #include <linux/if_arp.h>
 #include <linux/net.h>
 #include <linux/mctp.h>
@@ -21,6 +22,8 @@
 
 /* socket implementation */
 
+static void mctp_sk_expire_keys(struct timer_list *timer);
+
 static int mctp_release(struct socket *sock)
 {
 	struct sock *sk = sock->sk;
@@ -99,13 +102,20 @@ static int mctp_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
 	struct sk_buff *skb;
 
 	if (addr) {
+		const u8 tagbits = MCTP_TAG_MASK | MCTP_TAG_OWNER |
+			MCTP_TAG_PREALLOC;
+
 		if (addrlen < sizeof(struct sockaddr_mctp))
 			return -EINVAL;
 		if (addr->smctp_family != AF_MCTP)
 			return -EINVAL;
 		if (!mctp_sockaddr_is_ok(addr))
 			return -EINVAL;
-		if (addr->smctp_tag & ~(MCTP_TAG_MASK | MCTP_TAG_OWNER))
+		if (addr->smctp_tag & ~tagbits)
+			return -EINVAL;
+		/* can't preallocate a non-owned tag */
+		if (addr->smctp_tag & MCTP_TAG_PREALLOC &&
+		    !(addr->smctp_tag & MCTP_TAG_OWNER))
 			return -EINVAL;
 
 	} else {
@@ -248,6 +258,32 @@ out_free:
 	return rc;
 }
 
+/* We're done with the key; invalidate, stop reassembly, and remove from lists.
+ */
+static void __mctp_key_remove(struct mctp_sk_key *key, struct net *net,
+			      unsigned long flags, unsigned long reason)
+__releases(&key->lock)
+__must_hold(&net->mctp.keys_lock)
+{
+	struct sk_buff *skb;
+
+	trace_mctp_key_release(key, reason);
+	skb = key->reasm_head;
+	key->reasm_head = NULL;
+	key->reasm_dead = true;
+	key->valid = false;
+	mctp_dev_release_key(key->dev, key);
+	spin_unlock_irqrestore(&key->lock, flags);
+
+	hlist_del(&key->hlist);
+	hlist_del(&key->sklist);
+
+	/* unref for the lists */
+	mctp_key_unref(key);
+
+	kfree_skb(skb);
+}
+
 static int mctp_setsockopt(struct socket *sock, int level, int optname,
 			   sockptr_t optval, unsigned int optlen)
 {
@@ -293,6 +329,115 @@ static int mctp_getsockopt(struct socket *sock, int level, int optname,
 	return -EINVAL;
 }
 
+static int mctp_ioctl_alloctag(struct mctp_sock *msk, unsigned long arg)
+{
+	struct net *net = sock_net(&msk->sk);
+	struct mctp_sk_key *key = NULL;
+	struct mctp_ioc_tag_ctl ctl;
+	unsigned long flags;
+	u8 tag;
+
+	if (copy_from_user(&ctl, (void __user *)arg, sizeof(ctl)))
+		return -EFAULT;
+
+	if (ctl.tag)
+		return -EINVAL;
+
+	if (ctl.flags)
+		return -EINVAL;
+
+	key = mctp_alloc_local_tag(msk, ctl.peer_addr, MCTP_ADDR_ANY,
+				   true, &tag);
+	if (IS_ERR(key))
+		return PTR_ERR(key);
+
+	ctl.tag = tag | MCTP_TAG_OWNER | MCTP_TAG_PREALLOC;
+	if (copy_to_user((void __user *)arg, &ctl, sizeof(ctl))) {
+		spin_lock_irqsave(&key->lock, flags);
+		__mctp_key_remove(key, net, flags, MCTP_TRACE_KEY_DROPPED);
+		mctp_key_unref(key);
+		return -EFAULT;
+	}
+
+	mctp_key_unref(key);
+	return 0;
+}
+
+static int mctp_ioctl_droptag(struct mctp_sock *msk, unsigned long arg)
+{
+	struct net *net = sock_net(&msk->sk);
+	struct mctp_ioc_tag_ctl ctl;
+	unsigned long flags, fl2;
+	struct mctp_sk_key *key;
+	struct hlist_node *tmp;
+	int rc;
+	u8 tag;
+
+	if (copy_from_user(&ctl, (void __user *)arg, sizeof(ctl)))
+		return -EFAULT;
+
+	if (ctl.flags)
+		return -EINVAL;
+
+	/* Must be a local tag, TO set, preallocated */
+	if ((ctl.tag & ~MCTP_TAG_MASK) != (MCTP_TAG_OWNER | MCTP_TAG_PREALLOC))
+		return -EINVAL;
+
+	tag = ctl.tag & MCTP_TAG_MASK;
+	rc = -EINVAL;
+
+	spin_lock_irqsave(&net->mctp.keys_lock, flags);
+	hlist_for_each_entry_safe(key, tmp, &msk->keys, sklist) {
+		/* we do an irqsave here, even though we know the irq state,
+		 * so we have the flags to pass to __mctp_key_remove
+		 */
+		spin_lock_irqsave(&key->lock, fl2);
+		if (key->manual_alloc &&
+		    ctl.peer_addr == key->peer_addr &&
+		    tag == key->tag) {
+			__mctp_key_remove(key, net, fl2,
+					  MCTP_TRACE_KEY_DROPPED);
+			rc = 0;
+		} else {
+			spin_unlock_irqrestore(&key->lock, fl2);
+		}
+	}
+	spin_unlock_irqrestore(&net->mctp.keys_lock, flags);
+
+	return rc;
+}
+
+static int mctp_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+	struct mctp_sock *msk = container_of(sock->sk, struct mctp_sock, sk);
+
+	switch (cmd) {
+	case SIOCMCTPALLOCTAG:
+		return mctp_ioctl_alloctag(msk, arg);
+	case SIOCMCTPDROPTAG:
+		return mctp_ioctl_droptag(msk, arg);
+	}
+
+	return -EINVAL;
+}
+
+#ifdef CONFIG_COMPAT
+static int mctp_compat_ioctl(struct socket *sock, unsigned int cmd,
+			     unsigned long arg)
+{
+	void __user *argp = compat_ptr(arg);
+
+	switch (cmd) {
+	/* These have compatible ptr layouts */
+	case SIOCMCTPALLOCTAG:
+	case SIOCMCTPDROPTAG:
+		return mctp_ioctl(sock, cmd, (unsigned long)argp);
+	}
+
+	return -ENOIOCTLCMD;
+}
+#endif
+
 static const struct proto_ops mctp_dgram_ops = {
 	.family		= PF_MCTP,
 	.release	= mctp_release,
@@ -302,7 +447,7 @@ static const struct proto_ops mctp_dgram_ops = {
 	.accept		= sock_no_accept,
 	.getname	= sock_no_getname,
 	.poll		= datagram_poll,
-	.ioctl		= sock_no_ioctl,
+	.ioctl		= mctp_ioctl,
 	.gettstamp	= sock_gettstamp,
 	.listen		= sock_no_listen,
 	.shutdown	= sock_no_shutdown,
@@ -312,6 +457,9 @@ static const struct proto_ops mctp_dgram_ops = {
 	.recvmsg	= mctp_recvmsg,
 	.mmap		= sock_no_mmap,
 	.sendpage	= sock_no_sendpage,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= mctp_compat_ioctl,
+#endif
 };
 
 static void mctp_sk_expire_keys(struct timer_list *timer)
@@ -319,7 +467,7 @@ static void mctp_sk_expire_keys(struct timer_list *timer)
 	struct mctp_sock *msk = container_of(timer, struct mctp_sock,
 					     key_expiry);
 	struct net *net = sock_net(&msk->sk);
-	unsigned long next_expiry, flags;
+	unsigned long next_expiry, flags, fl2;
 	struct mctp_sk_key *key;
 	struct hlist_node *tmp;
 	bool next_expiry_valid = false;
@@ -327,15 +475,16 @@ static void mctp_sk_expire_keys(struct timer_list *timer)
 	spin_lock_irqsave(&net->mctp.keys_lock, flags);
 
 	hlist_for_each_entry_safe(key, tmp, &msk->keys, sklist) {
-		spin_lock(&key->lock);
+		/* don't expire. manual_alloc is immutable, no locking
+		 * required.
+		 */
+		if (key->manual_alloc)
+			continue;
 
+		spin_lock_irqsave(&key->lock, fl2);
 		if (!time_after_eq(key->expiry, jiffies)) {
-			trace_mctp_key_release(key, MCTP_TRACE_KEY_TIMEOUT);
-			key->valid = false;
-			hlist_del_rcu(&key->hlist);
-			hlist_del_rcu(&key->sklist);
-			spin_unlock(&key->lock);
-			mctp_key_unref(key);
+			__mctp_key_remove(key, net, fl2,
+					  MCTP_TRACE_KEY_TIMEOUT);
 			continue;
 		}
 
@@ -346,7 +495,7 @@ static void mctp_sk_expire_keys(struct timer_list *timer)
 			next_expiry = key->expiry;
 			next_expiry_valid = true;
 		}
-		spin_unlock(&key->lock);
+		spin_unlock_irqrestore(&key->lock, fl2);
 	}
 
 	spin_unlock_irqrestore(&net->mctp.keys_lock, flags);
@@ -387,9 +536,9 @@ static void mctp_sk_unhash(struct sock *sk)
 {
 	struct mctp_sock *msk = container_of(sk, struct mctp_sock, sk);
 	struct net *net = sock_net(sk);
+	unsigned long flags, fl2;
 	struct mctp_sk_key *key;
 	struct hlist_node *tmp;
-	unsigned long flags;
 
 	/* remove from any type-based binds */
 	mutex_lock(&net->mctp.bind_lock);
@@ -399,20 +548,8 @@ static void mctp_sk_unhash(struct sock *sk)
 	/* remove tag allocations */
 	spin_lock_irqsave(&net->mctp.keys_lock, flags);
 	hlist_for_each_entry_safe(key, tmp, &msk->keys, sklist) {
-		hlist_del(&key->sklist);
-		hlist_del(&key->hlist);
-
-		trace_mctp_key_release(key, MCTP_TRACE_KEY_CLOSED);
-
-		spin_lock(&key->lock);
-		kfree_skb(key->reasm_head);
-		key->reasm_head = NULL;
-		key->reasm_dead = true;
-		key->valid = false;
-		spin_unlock(&key->lock);
-
-		/* key is no longer on the lookup lists, unref */
-		mctp_key_unref(key);
+		spin_lock_irqsave(&key->lock, fl2);
+		__mctp_key_remove(key, net, fl2, MCTP_TRACE_KEY_CLOSED);
 	}
 	spin_unlock_irqrestore(&net->mctp.keys_lock, flags);
 }
diff --git a/net/mctp/device.c b/net/mctp/device.c
index ef2755f82f87..f49be882e98e 100644
--- a/net/mctp/device.c
+++ b/net/mctp/device.c
@@ -6,6 +6,7 @@
  * Copyright (c) 2021 Google
  */
 
+#include <linux/if_arp.h>
 #include <linux/if_link.h>
 #include <linux/mctp.h>
 #include <linux/netdevice.h>
@@ -24,12 +25,25 @@ struct mctp_dump_cb {
 	size_t a_idx;
 };
 
-/* unlocked: caller must hold rcu_read_lock */
+/* unlocked: caller must hold rcu_read_lock.
+ * Returned mctp_dev has its refcount incremented, or NULL if unset.
+ */
 struct mctp_dev *__mctp_dev_get(const struct net_device *dev)
 {
-	return rcu_dereference(dev->mctp_ptr);
+	struct mctp_dev *mdev = rcu_dereference(dev->mctp_ptr);
+
+	/* RCU guarantees that any mdev is still live.
+	 * Zero refcount implies a pending free, return NULL.
+	 */
+	if (mdev)
+		if (!refcount_inc_not_zero(&mdev->refs))
+			return NULL;
+	return mdev;
 }
 
+/* Returned mctp_dev does not have refcount incremented. The returned pointer
+ * remains live while rtnl_lock is held, as that prevents mctp_unregister()
+ */
 struct mctp_dev *mctp_dev_get_rtnl(const struct net_device *dev)
 {
 	return rtnl_dereference(dev->mctp_ptr);
@@ -106,7 +120,7 @@ static int mctp_dump_addrinfo(struct sk_buff *skb, struct netlink_callback *cb)
 	struct ifaddrmsg *hdr;
 	struct mctp_dev *mdev;
 	int ifindex;
-	int idx, rc;
+	int idx = 0, rc;
 
 	hdr = nlmsg_data(cb->nlh);
 	// filter by ifindex if requested
@@ -123,6 +137,7 @@ static int mctp_dump_addrinfo(struct sk_buff *skb, struct netlink_callback *cb)
 				if (mdev) {
 					rc = mctp_dump_dev_addrinfo(mdev,
 								    skb, cb);
+					mctp_dev_put(mdev);
 					// Error indicates full buffer, this
 					// callback will get retried.
 					if (rc < 0)
@@ -208,7 +223,7 @@ static int mctp_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh,
 	if (!mdev)
 		return -ENODEV;
 
-	if (!mctp_address_ok(addr->s_addr))
+	if (!mctp_address_unicast(addr->s_addr))
 		return -EINVAL;
 
 	/* Prevent duplicates. Under RTNL so don't need to lock for reading */
@@ -297,7 +312,7 @@ void mctp_dev_hold(struct mctp_dev *mdev)
 
 void mctp_dev_put(struct mctp_dev *mdev)
 {
-	if (refcount_dec_and_test(&mdev->refs)) {
+	if (mdev && refcount_dec_and_test(&mdev->refs)) {
 		dev_put(mdev->dev);
 		kfree_rcu(mdev, rcu);
 	}
@@ -369,6 +384,7 @@ static size_t mctp_get_link_af_size(const struct net_device *dev,
 	if (!mdev)
 		return 0;
 	ret = nla_total_size(4); /* IFLA_MCTP_NET */
+	mctp_dev_put(mdev);
 	return ret;
 }
 
@@ -412,10 +428,10 @@ static void mctp_unregister(struct net_device *dev)
 	struct mctp_dev *mdev;
 
 	mdev = mctp_dev_get_rtnl(dev);
-	if (mctp_known(dev) != (bool)mdev) {
+	if (mdev && !mctp_known(dev)) {
 		// Sanity check, should match what was set in mctp_register
-		netdev_warn(dev, "%s: mdev pointer %d but type (%d) match is %d",
-			    __func__, (bool)mdev, mctp_known(dev), dev->type);
+		netdev_warn(dev, "%s: BUG mctp_ptr set for unknown type %d",
+			    __func__, dev->type);
 		return;
 	}
 	if (!mdev)
@@ -439,7 +455,7 @@ static int mctp_register(struct net_device *dev)
 
 	if (mdev) {
 		if (!mctp_known(dev))
-			netdev_warn(dev, "%s: mctp_dev set for unknown type %d",
+			netdev_warn(dev, "%s: BUG mctp_ptr set for unknown type %d",
 				    __func__, dev->type);
 		return 0;
 	}
diff --git a/net/mctp/neigh.c b/net/mctp/neigh.c
index 6ad3e33bd4d4..ffa0f9e0983f 100644
--- a/net/mctp/neigh.c
+++ b/net/mctp/neigh.c
@@ -143,7 +143,7 @@ static int mctp_rtm_newneigh(struct sk_buff *skb, struct nlmsghdr *nlh,
 	}
 
 	eid = nla_get_u8(tb[NDA_DST]);
-	if (!mctp_address_ok(eid)) {
+	if (!mctp_address_unicast(eid)) {
 		NL_SET_ERR_MSG(extack, "Invalid neighbour EID");
 		return -EINVAL;
 	}
diff --git a/net/mctp/route.c b/net/mctp/route.c
index e52cef750500..d5e7db83fe9d 100644
--- a/net/mctp/route.c
+++ b/net/mctp/route.c
@@ -64,8 +64,7 @@ static struct mctp_sock *mctp_lookup_bind(struct net *net, struct sk_buff *skb)
 		if (msk->bind_type != type)
 			continue;
 
-		if (msk->bind_addr != MCTP_ADDR_ANY &&
-		    msk->bind_addr != mh->dest)
+		if (!mctp_address_matches(msk->bind_addr, mh->dest))
 			continue;
 
 		return msk;
@@ -77,7 +76,7 @@ static struct mctp_sock *mctp_lookup_bind(struct net *net, struct sk_buff *skb)
 static bool mctp_key_match(struct mctp_sk_key *key, mctp_eid_t local,
 			   mctp_eid_t peer, u8 tag)
 {
-	if (key->local_addr != local)
+	if (!mctp_address_matches(key->local_addr, local))
 		return false;
 
 	if (key->peer_addr != peer)
@@ -204,29 +203,38 @@ static int mctp_key_add(struct mctp_sk_key *key, struct mctp_sock *msk)
 	return rc;
 }
 
-/* We're done with the key; unset valid and remove from lists. There may still
- * be outstanding refs on the key though...
+/* Helper for mctp_route_input().
+ * We're done with the key; unlock and unref the key.
+ * For the usual case of automatic expiry we remove the key from lists.
+ * In the case that manual allocation is set on a key we release the lock
+ * and local ref, reset reassembly, but don't remove from lists.
  */
-static void __mctp_key_unlock_drop(struct mctp_sk_key *key, struct net *net,
-				   unsigned long flags)
-	__releases(&key->lock)
+static void __mctp_key_done_in(struct mctp_sk_key *key, struct net *net,
+			       unsigned long flags, unsigned long reason)
+__releases(&key->lock)
 {
 	struct sk_buff *skb;
 
+	trace_mctp_key_release(key, reason);
 	skb = key->reasm_head;
 	key->reasm_head = NULL;
-	key->reasm_dead = true;
-	key->valid = false;
-	mctp_dev_release_key(key->dev, key);
+
+	if (!key->manual_alloc) {
+		key->reasm_dead = true;
+		key->valid = false;
+		mctp_dev_release_key(key->dev, key);
+	}
 	spin_unlock_irqrestore(&key->lock, flags);
 
-	spin_lock_irqsave(&net->mctp.keys_lock, flags);
-	hlist_del(&key->hlist);
-	hlist_del(&key->sklist);
-	spin_unlock_irqrestore(&net->mctp.keys_lock, flags);
+	if (!key->manual_alloc) {
+		spin_lock_irqsave(&net->mctp.keys_lock, flags);
+		hlist_del(&key->hlist);
+		hlist_del(&key->sklist);
+		spin_unlock_irqrestore(&net->mctp.keys_lock, flags);
 
-	/* one unref for the lists */
-	mctp_key_unref(key);
+		/* unref for the lists */
+		mctp_key_unref(key);
+	}
 
 	/* and one for the local reference */
 	mctp_key_unref(key);
@@ -380,9 +388,8 @@ static int mctp_route_input(struct mctp_route *route, struct sk_buff *skb)
 				/* we've hit a pending reassembly; not much we
 				 * can do but drop it
 				 */
-				trace_mctp_key_release(key,
-						       MCTP_TRACE_KEY_REPLIED);
-				__mctp_key_unlock_drop(key, net, f);
+				__mctp_key_done_in(key, net, f,
+						   MCTP_TRACE_KEY_REPLIED);
 				key = NULL;
 			}
 			rc = 0;
@@ -425,9 +432,8 @@ static int mctp_route_input(struct mctp_route *route, struct sk_buff *skb)
 		} else {
 			if (key->reasm_head || key->reasm_dead) {
 				/* duplicate start? drop everything */
-				trace_mctp_key_release(key,
-						       MCTP_TRACE_KEY_INVALIDATED);
-				__mctp_key_unlock_drop(key, net, f);
+				__mctp_key_done_in(key, net, f,
+						   MCTP_TRACE_KEY_INVALIDATED);
 				rc = -EEXIST;
 				key = NULL;
 			} else {
@@ -452,8 +458,7 @@ static int mctp_route_input(struct mctp_route *route, struct sk_buff *skb)
 		if (!rc && flags & MCTP_HDR_FLAG_EOM) {
 			sock_queue_rcv_skb(key->sk, key->reasm_head);
 			key->reasm_head = NULL;
-			trace_mctp_key_release(key, MCTP_TRACE_KEY_REPLIED);
-			__mctp_key_unlock_drop(key, net, f);
+			__mctp_key_done_in(key, net, f, MCTP_TRACE_KEY_REPLIED);
 			key = NULL;
 		}
 
@@ -581,9 +586,9 @@ static void mctp_reserve_tag(struct net *net, struct mctp_sk_key *key,
 /* Allocate a locally-owned tag value for (saddr, daddr), and reserve
  * it for the socket msk
  */
-static struct mctp_sk_key *mctp_alloc_local_tag(struct mctp_sock *msk,
-						mctp_eid_t saddr,
-						mctp_eid_t daddr, u8 *tagp)
+struct mctp_sk_key *mctp_alloc_local_tag(struct mctp_sock *msk,
+					 mctp_eid_t daddr, mctp_eid_t saddr,
+					 bool manual, u8 *tagp)
 {
 	struct net *net = sock_net(&msk->sk);
 	struct netns_mctp *mns = &net->mctp;
@@ -617,9 +622,8 @@ static struct mctp_sk_key *mctp_alloc_local_tag(struct mctp_sock *msk,
 		if (tmp->tag & MCTP_HDR_FLAG_TO)
 			continue;
 
-		if (!((tmp->peer_addr == daddr ||
-		       tmp->peer_addr == MCTP_ADDR_ANY) &&
-		       tmp->local_addr == saddr))
+		if (!(mctp_address_matches(tmp->peer_addr, daddr) &&
+		      mctp_address_matches(tmp->local_addr, saddr)))
 			continue;
 
 		spin_lock(&tmp->lock);
@@ -639,6 +643,7 @@ static struct mctp_sk_key *mctp_alloc_local_tag(struct mctp_sock *msk,
 		mctp_reserve_tag(net, key, msk);
 		trace_mctp_key_acquire(key);
 
+		key->manual_alloc = manual;
 		*tagp = key->tag;
 	}
 
@@ -652,6 +657,50 @@ static struct mctp_sk_key *mctp_alloc_local_tag(struct mctp_sock *msk,
 	return key;
 }
 
+static struct mctp_sk_key *mctp_lookup_prealloc_tag(struct mctp_sock *msk,
+						    mctp_eid_t daddr,
+						    u8 req_tag, u8 *tagp)
+{
+	struct net *net = sock_net(&msk->sk);
+	struct netns_mctp *mns = &net->mctp;
+	struct mctp_sk_key *key, *tmp;
+	unsigned long flags;
+
+	req_tag &= ~(MCTP_TAG_PREALLOC | MCTP_TAG_OWNER);
+	key = NULL;
+
+	spin_lock_irqsave(&mns->keys_lock, flags);
+
+	hlist_for_each_entry(tmp, &mns->keys, hlist) {
+		if (tmp->tag != req_tag)
+			continue;
+
+		if (!mctp_address_matches(tmp->peer_addr, daddr))
+			continue;
+
+		if (!tmp->manual_alloc)
+			continue;
+
+		spin_lock(&tmp->lock);
+		if (tmp->valid) {
+			key = tmp;
+			refcount_inc(&key->refs);
+			spin_unlock(&tmp->lock);
+			break;
+		}
+		spin_unlock(&tmp->lock);
+	}
+	spin_unlock_irqrestore(&mns->keys_lock, flags);
+
+	if (!key)
+		return ERR_PTR(-ENOENT);
+
+	if (tagp)
+		*tagp = key->tag;
+
+	return key;
+}
+
 /* routing lookups */
 static bool mctp_rt_match_eid(struct mctp_route *rt,
 			      unsigned int net, mctp_eid_t eid)
@@ -786,9 +835,8 @@ int mctp_local_output(struct sock *sk, struct mctp_route *rt,
 {
 	struct mctp_sock *msk = container_of(sk, struct mctp_sock, sk);
 	struct mctp_skb_cb *cb = mctp_cb(skb);
-	struct mctp_route tmp_rt;
+	struct mctp_route tmp_rt = {0};
 	struct mctp_sk_key *key;
-	struct net_device *dev;
 	struct mctp_hdr *hdr;
 	unsigned long flags;
 	unsigned int mtu;
@@ -801,12 +849,12 @@ int mctp_local_output(struct sock *sk, struct mctp_route *rt,
 
 	if (rt) {
 		ext_rt = false;
-		dev = NULL;
-
 		if (WARN_ON(!rt->dev))
 			goto out_release;
 
 	} else if (cb->ifindex) {
+		struct net_device *dev;
+
 		ext_rt = true;
 		rt = &tmp_rt;
 
@@ -816,7 +864,6 @@ int mctp_local_output(struct sock *sk, struct mctp_route *rt,
 			rcu_read_unlock();
 			return rc;
 		}
-
 		rt->dev = __mctp_dev_get(dev);
 		rcu_read_unlock();
 
@@ -846,8 +893,14 @@ int mctp_local_output(struct sock *sk, struct mctp_route *rt,
 	if (rc)
 		goto out_release;
 
-	if (req_tag & MCTP_HDR_FLAG_TO) {
-		key = mctp_alloc_local_tag(msk, saddr, daddr, &tag);
+	if (req_tag & MCTP_TAG_OWNER) {
+		if (req_tag & MCTP_TAG_PREALLOC)
+			key = mctp_lookup_prealloc_tag(msk, daddr,
+						       req_tag, &tag);
+		else
+			key = mctp_alloc_local_tag(msk, daddr, saddr,
+						   false, &tag);
+
 		if (IS_ERR(key)) {
 			rc = PTR_ERR(key);
 			goto out_release;
@@ -858,7 +911,7 @@ int mctp_local_output(struct sock *sk, struct mctp_route *rt,
 		tag |= MCTP_HDR_FLAG_TO;
 	} else {
 		key = NULL;
-		tag = req_tag;
+		tag = req_tag & MCTP_TAG_MASK;
 	}
 
 	skb->protocol = htons(ETH_P_MCTP);
@@ -891,10 +944,9 @@ out_release:
 	if (!ext_rt)
 		mctp_route_release(rt);
 
-	dev_put(dev);
+	mctp_dev_put(tmp_rt.dev);
 
 	return rc;
-
 }
 
 /* route management */
@@ -906,7 +958,7 @@ static int mctp_route_add(struct mctp_dev *mdev, mctp_eid_t daddr_start,
 	struct net *net = dev_net(mdev->dev);
 	struct mctp_route *rt, *ert;
 
-	if (!mctp_address_ok(daddr_start))
+	if (!mctp_address_unicast(daddr_start))
 		return -EINVAL;
 
 	if (daddr_extent > 0xff || daddr_start + daddr_extent >= 255)
@@ -1036,6 +1088,17 @@ static int mctp_pkttype_receive(struct sk_buff *skb, struct net_device *dev,
 	if (mh->ver < MCTP_VER_MIN || mh->ver > MCTP_VER_MAX)
 		goto err_drop;
 
+	/* source must be valid unicast or null; drop reserved ranges and
+	 * broadcast
+	 */
+	if (!(mctp_address_unicast(mh->src) || mctp_address_null(mh->src)))
+		goto err_drop;
+
+	/* dest address: as above, but allow broadcast */
+	if (!(mctp_address_unicast(mh->dest) || mctp_address_null(mh->dest) ||
+	      mctp_address_broadcast(mh->dest)))
+		goto err_drop;
+
 	/* MCTP drivers must populate halen/haddr */
 	if (dev->type == ARPHRD_MCTP) {
 		cb = mctp_cb(skb);
@@ -1057,11 +1120,13 @@ static int mctp_pkttype_receive(struct sk_buff *skb, struct net_device *dev,
 
 	rt->output(rt, skb);
 	mctp_route_release(rt);
+	mctp_dev_put(mdev);
 
 	return NET_RX_SUCCESS;
 
 err_drop:
 	kfree_skb(skb);
+	mctp_dev_put(mdev);
 	return NET_RX_DROP;
 }
 
diff --git a/net/mctp/test/route-test.c b/net/mctp/test/route-test.c
index 750f9f9b4daf..61205cf40074 100644
--- a/net/mctp/test/route-test.c
+++ b/net/mctp/test/route-test.c
@@ -369,14 +369,15 @@ static void mctp_test_route_input_sk(struct kunit *test)
 
 #define FL_S	(MCTP_HDR_FLAG_SOM)
 #define FL_E	(MCTP_HDR_FLAG_EOM)
-#define FL_T	(MCTP_HDR_FLAG_TO)
+#define FL_TO	(MCTP_HDR_FLAG_TO)
+#define FL_T(t)	((t) & MCTP_HDR_TAG_MASK)
 
 static const struct mctp_route_input_sk_test mctp_route_input_sk_tests[] = {
-	{ .hdr = RX_HDR(1, 10, 8, FL_S | FL_E | FL_T), .type = 0, .deliver = true },
-	{ .hdr = RX_HDR(1, 10, 8, FL_S | FL_E | FL_T), .type = 1, .deliver = false },
+	{ .hdr = RX_HDR(1, 10, 8, FL_S | FL_E | FL_TO), .type = 0, .deliver = true },
+	{ .hdr = RX_HDR(1, 10, 8, FL_S | FL_E | FL_TO), .type = 1, .deliver = false },
 	{ .hdr = RX_HDR(1, 10, 8, FL_S | FL_E), .type = 0, .deliver = false },
-	{ .hdr = RX_HDR(1, 10, 8, FL_E | FL_T), .type = 0, .deliver = false },
-	{ .hdr = RX_HDR(1, 10, 8, FL_T), .type = 0, .deliver = false },
+	{ .hdr = RX_HDR(1, 10, 8, FL_E | FL_TO), .type = 0, .deliver = false },
+	{ .hdr = RX_HDR(1, 10, 8, FL_TO), .type = 0, .deliver = false },
 	{ .hdr = RX_HDR(1, 10, 8, 0), .type = 0, .deliver = false },
 };
 
@@ -436,7 +437,7 @@ static void mctp_test_route_input_sk_reasm(struct kunit *test)
 	__mctp_route_test_fini(test, dev, rt, sock);
 }
 
-#define RX_FRAG(f, s) RX_HDR(1, 10, 8, FL_T | (f) | ((s) << MCTP_HDR_SEQ_SHIFT))
+#define RX_FRAG(f, s) RX_HDR(1, 10, 8, FL_TO | (f) | ((s) << MCTP_HDR_SEQ_SHIFT))
 
 static const struct mctp_route_input_sk_reasm_test mctp_route_input_sk_reasm_tests[] = {
 	{
@@ -522,12 +523,156 @@ static void mctp_route_input_sk_reasm_to_desc(
 KUNIT_ARRAY_PARAM(mctp_route_input_sk_reasm, mctp_route_input_sk_reasm_tests,
 		  mctp_route_input_sk_reasm_to_desc);
 
+struct mctp_route_input_sk_keys_test {
+	const char	*name;
+	mctp_eid_t	key_peer_addr;
+	mctp_eid_t	key_local_addr;
+	u8		key_tag;
+	struct mctp_hdr hdr;
+	bool		deliver;
+};
+
+/* test packet rx in the presence of various key configurations */
+static void mctp_test_route_input_sk_keys(struct kunit *test)
+{
+	const struct mctp_route_input_sk_keys_test *params;
+	struct mctp_test_route *rt;
+	struct sk_buff *skb, *skb2;
+	struct mctp_test_dev *dev;
+	struct mctp_sk_key *key;
+	struct netns_mctp *mns;
+	struct mctp_sock *msk;
+	struct socket *sock;
+	unsigned long flags;
+	int rc;
+	u8 c;
+
+	params = test->param_value;
+
+	dev = mctp_test_create_dev();
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, dev);
+
+	rt = mctp_test_create_route(&init_net, dev->mdev, 8, 68);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, rt);
+
+	rc = sock_create_kern(&init_net, AF_MCTP, SOCK_DGRAM, 0, &sock);
+	KUNIT_ASSERT_EQ(test, rc, 0);
+
+	msk = container_of(sock->sk, struct mctp_sock, sk);
+	mns = &sock_net(sock->sk)->mctp;
+
+	/* set the incoming tag according to test params */
+	key = mctp_key_alloc(msk, params->key_local_addr, params->key_peer_addr,
+			     params->key_tag, GFP_KERNEL);
+
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, key);
+
+	spin_lock_irqsave(&mns->keys_lock, flags);
+	mctp_reserve_tag(&init_net, key, msk);
+	spin_unlock_irqrestore(&mns->keys_lock, flags);
+
+	/* create packet and route */
+	c = 0;
+	skb = mctp_test_create_skb_data(&params->hdr, &c);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, skb);
+
+	skb->dev = dev->ndev;
+	__mctp_cb(skb);
+
+	rc = mctp_route_input(&rt->rt, skb);
+
+	/* (potentially) receive message */
+	skb2 = skb_recv_datagram(sock->sk, 0, 1, &rc);
+
+	if (params->deliver)
+		KUNIT_EXPECT_NOT_ERR_OR_NULL(test, skb2);
+	else
+		KUNIT_EXPECT_PTR_EQ(test, skb2, NULL);
+
+	if (skb2)
+		skb_free_datagram(sock->sk, skb2);
+
+	mctp_key_unref(key);
+	__mctp_route_test_fini(test, dev, rt, sock);
+}
+
+static const struct mctp_route_input_sk_keys_test mctp_route_input_sk_keys_tests[] = {
+	{
+		.name = "direct match",
+		.key_peer_addr = 9,
+		.key_local_addr = 8,
+		.key_tag = 1,
+		.hdr = RX_HDR(1, 9, 8, FL_S | FL_E | FL_T(1)),
+		.deliver = true,
+	},
+	{
+		.name = "flipped src/dest",
+		.key_peer_addr = 8,
+		.key_local_addr = 9,
+		.key_tag = 1,
+		.hdr = RX_HDR(1, 9, 8, FL_S | FL_E | FL_T(1)),
+		.deliver = false,
+	},
+	{
+		.name = "peer addr mismatch",
+		.key_peer_addr = 9,
+		.key_local_addr = 8,
+		.key_tag = 1,
+		.hdr = RX_HDR(1, 10, 8, FL_S | FL_E | FL_T(1)),
+		.deliver = false,
+	},
+	{
+		.name = "tag value mismatch",
+		.key_peer_addr = 9,
+		.key_local_addr = 8,
+		.key_tag = 1,
+		.hdr = RX_HDR(1, 9, 8, FL_S | FL_E | FL_T(2)),
+		.deliver = false,
+	},
+	{
+		.name = "TO mismatch",
+		.key_peer_addr = 9,
+		.key_local_addr = 8,
+		.key_tag = 1,
+		.hdr = RX_HDR(1, 9, 8, FL_S | FL_E | FL_T(1) | FL_TO),
+		.deliver = false,
+	},
+	{
+		.name = "broadcast response",
+		.key_peer_addr = MCTP_ADDR_ANY,
+		.key_local_addr = 8,
+		.key_tag = 1,
+		.hdr = RX_HDR(1, 11, 8, FL_S | FL_E | FL_T(1)),
+		.deliver = true,
+	},
+	{
+		.name = "any local match",
+		.key_peer_addr = 12,
+		.key_local_addr = MCTP_ADDR_ANY,
+		.key_tag = 1,
+		.hdr = RX_HDR(1, 12, 8, FL_S | FL_E | FL_T(1)),
+		.deliver = true,
+	},
+};
+
+static void mctp_route_input_sk_keys_to_desc(
+				const struct mctp_route_input_sk_keys_test *t,
+				char *desc)
+{
+	sprintf(desc, "%s", t->name);
+}
+
+KUNIT_ARRAY_PARAM(mctp_route_input_sk_keys, mctp_route_input_sk_keys_tests,
+		  mctp_route_input_sk_keys_to_desc);
+
 static struct kunit_case mctp_test_cases[] = {
 	KUNIT_CASE_PARAM(mctp_test_fragment, mctp_frag_gen_params),
 	KUNIT_CASE_PARAM(mctp_test_rx_input, mctp_rx_input_gen_params),
 	KUNIT_CASE_PARAM(mctp_test_route_input_sk, mctp_route_input_sk_gen_params),
 	KUNIT_CASE_PARAM(mctp_test_route_input_sk_reasm,
 			 mctp_route_input_sk_reasm_gen_params),
+	KUNIT_CASE_PARAM(mctp_test_route_input_sk_keys,
+			 mctp_route_input_sk_keys_gen_params),
 	{}
 };
 
diff --git a/net/mctp/test/utils.c b/net/mctp/test/utils.c
index 7b7918702592..e03ba66bbe18 100644
--- a/net/mctp/test/utils.c
+++ b/net/mctp/test/utils.c
@@ -54,7 +54,6 @@ struct mctp_test_dev *mctp_test_create_dev(void)
 
 	rcu_read_lock();
 	dev->mdev = __mctp_dev_get(ndev);
-	mctp_dev_hold(dev->mdev);
 	rcu_read_unlock();
 
 	return dev;
diff --git a/net/mptcp/mib.c b/net/mptcp/mib.c
index 7558802a1435..e55d3dfbee0c 100644
--- a/net/mptcp/mib.c
+++ b/net/mptcp/mib.c
@@ -48,6 +48,10 @@ static const struct snmp_mib mptcp_snmp_list[] = {
 	SNMP_MIB_ITEM("MPPrioRx", MPTCP_MIB_MPPRIORX),
 	SNMP_MIB_ITEM("MPFailTx", MPTCP_MIB_MPFAILTX),
 	SNMP_MIB_ITEM("MPFailRx", MPTCP_MIB_MPFAILRX),
+	SNMP_MIB_ITEM("MPFastcloseTx", MPTCP_MIB_MPFASTCLOSETX),
+	SNMP_MIB_ITEM("MPFastcloseRx", MPTCP_MIB_MPFASTCLOSERX),
+	SNMP_MIB_ITEM("MPRstTx", MPTCP_MIB_MPRSTTX),
+	SNMP_MIB_ITEM("MPRstRx", MPTCP_MIB_MPRSTRX),
 	SNMP_MIB_ITEM("RcvPruned", MPTCP_MIB_RCVPRUNED),
 	SNMP_MIB_ITEM("SubflowStale", MPTCP_MIB_SUBFLOWSTALE),
 	SNMP_MIB_ITEM("SubflowRecover", MPTCP_MIB_SUBFLOWRECOVER),
diff --git a/net/mptcp/mib.h b/net/mptcp/mib.h
index 2966fcb6548b..00576179a619 100644
--- a/net/mptcp/mib.h
+++ b/net/mptcp/mib.h
@@ -41,6 +41,10 @@ enum linux_mptcp_mib_field {
 	MPTCP_MIB_MPPRIORX,		/* Received a MP_PRIO */
 	MPTCP_MIB_MPFAILTX,		/* Transmit a MP_FAIL */
 	MPTCP_MIB_MPFAILRX,		/* Received a MP_FAIL */
+	MPTCP_MIB_MPFASTCLOSETX,	/* Transmit a MP_FASTCLOSE */
+	MPTCP_MIB_MPFASTCLOSERX,	/* Received a MP_FASTCLOSE */
+	MPTCP_MIB_MPRSTTX,		/* Transmit a MP_RST */
+	MPTCP_MIB_MPRSTRX,		/* Received a MP_RST */
 	MPTCP_MIB_RCVPRUNED,		/* Incoming packet dropped due to memory limit */
 	MPTCP_MIB_SUBFLOWSTALE,		/* Subflows entered 'stale' status */
 	MPTCP_MIB_SUBFLOWRECOVER,	/* Subflows returned to active status after being stale */
diff --git a/net/mptcp/options.c b/net/mptcp/options.c
index 645dd984fef0..325383646f5c 100644
--- a/net/mptcp/options.c
+++ b/net/mptcp/options.c
@@ -323,6 +323,7 @@ static void mptcp_parse_option(const struct sk_buff *skb,
 		mp_opt->rcvr_key = get_unaligned_be64(ptr);
 		ptr += 8;
 		mp_opt->suboptions |= OPTION_MPTCP_FASTCLOSE;
+		pr_debug("MP_FASTCLOSE: recv_key=%llu", mp_opt->rcvr_key);
 		break;
 
 	case MPTCPOPT_RST:
@@ -336,6 +337,8 @@ static void mptcp_parse_option(const struct sk_buff *skb,
 		flags = *ptr++;
 		mp_opt->reset_transient = flags & MPTCP_RST_TRANSIENT;
 		mp_opt->reset_reason = *ptr;
+		pr_debug("MP_RST: transient=%u reason=%u",
+			 mp_opt->reset_transient, mp_opt->reset_reason);
 		break;
 
 	case MPTCPOPT_MP_FAIL:
@@ -353,8 +356,7 @@ static void mptcp_parse_option(const struct sk_buff *skb,
 	}
 }
 
-void mptcp_get_options(const struct sock *sk,
-		       const struct sk_buff *skb,
+void mptcp_get_options(const struct sk_buff *skb,
 		       struct mptcp_options_received *mp_opt)
 {
 	const struct tcphdr *th = tcp_hdr(skb);
@@ -651,7 +653,6 @@ static bool mptcp_established_options_add_addr(struct sock *sk, struct sk_buff *
 	bool drop_other_suboptions = false;
 	unsigned int opt_size = *size;
 	bool echo;
-	bool port;
 	int len;
 
 	/* add addr will strip the existing options, be sure to avoid breaking
@@ -660,12 +661,12 @@ static bool mptcp_established_options_add_addr(struct sock *sk, struct sk_buff *
 	if (!mptcp_pm_should_add_signal(msk) ||
 	    (opts->suboptions & (OPTION_MPTCP_MPJ_ACK | OPTION_MPTCP_MPC_ACK)) ||
 	    !mptcp_pm_add_addr_signal(msk, skb, opt_size, remaining, &opts->addr,
-		    &echo, &port, &drop_other_suboptions))
+		    &echo, &drop_other_suboptions))
 		return false;
 
 	if (drop_other_suboptions)
 		remaining += opt_size;
-	len = mptcp_add_addr_len(opts->addr.family, echo, port);
+	len = mptcp_add_addr_len(opts->addr.family, echo, !!opts->addr.port);
 	if (remaining < len)
 		return false;
 
@@ -832,11 +833,13 @@ bool mptcp_established_options(struct sock *sk, struct sk_buff *skb,
 		    mptcp_established_options_mp_fail(sk, &opt_size, remaining, opts)) {
 			*size += opt_size;
 			remaining -= opt_size;
+			MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPFASTCLOSETX);
 		}
 		/* MP_RST can be used with MP_FASTCLOSE and MP_FAIL if there is room */
 		if (mptcp_established_options_rst(sk, skb, &opt_size, remaining, opts)) {
 			*size += opt_size;
 			remaining -= opt_size;
+			MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPRSTTX);
 		}
 		return true;
 	}
@@ -1084,8 +1087,7 @@ static bool add_addr_hmac_valid(struct mptcp_sock *msk,
 				      &mp_opt->addr);
 
 	pr_debug("msk=%p, ahmac=%llu, mp_opt->ahmac=%llu\n",
-		 msk, (unsigned long long)hmac,
-		 (unsigned long long)mp_opt->ahmac);
+		 msk, hmac, mp_opt->ahmac);
 
 	return hmac == mp_opt->ahmac;
 }
@@ -1112,7 +1114,7 @@ bool mptcp_incoming_options(struct sock *sk, struct sk_buff *skb)
 		return true;
 	}
 
-	mptcp_get_options(sk, skb, &mp_opt);
+	mptcp_get_options(skb, &mp_opt);
 
 	/* The subflow can be in close state only if check_fully_established()
 	 * just sent a reset. If so, tell the caller to ignore the current packet.
@@ -1125,6 +1127,7 @@ bool mptcp_incoming_options(struct sock *sk, struct sk_buff *skb)
 		    msk->local_key == mp_opt.rcvr_key) {
 			WRITE_ONCE(msk->rcv_fastclose, true);
 			mptcp_schedule_work((struct sock *)msk);
+			MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPFASTCLOSERX);
 		}
 
 		if ((mp_opt.suboptions & OPTION_MPTCP_ADD_ADDR) &&
@@ -1159,6 +1162,7 @@ bool mptcp_incoming_options(struct sock *sk, struct sk_buff *skb)
 			subflow->reset_seen = 1;
 			subflow->reset_reason = mp_opt.reset_reason;
 			subflow->reset_transient = mp_opt.reset_transient;
+			MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPRSTRX);
 		}
 
 		if (!(mp_opt.suboptions & OPTION_MPTCP_DSS))
@@ -1264,22 +1268,30 @@ static u16 mptcp_make_csum(const struct mptcp_ext *mpext)
 void mptcp_write_options(__be32 *ptr, const struct tcp_sock *tp,
 			 struct mptcp_out_options *opts)
 {
-	if (unlikely(OPTION_MPTCP_FAIL & opts->suboptions)) {
-		const struct sock *ssk = (const struct sock *)tp;
-		struct mptcp_subflow_context *subflow;
-
-		subflow = mptcp_subflow_ctx(ssk);
-		subflow->send_mp_fail = 0;
-
-		*ptr++ = mptcp_option(MPTCPOPT_MP_FAIL,
-				      TCPOLEN_MPTCP_FAIL,
-				      0, 0);
-		put_unaligned_be64(opts->fail_seq, ptr);
-		ptr += 2;
-	}
-
-	/* DSS, MPC, MPJ, ADD_ADDR, FASTCLOSE and RST are mutually exclusive,
-	 * see mptcp_established_options*()
+	const struct sock *ssk = (const struct sock *)tp;
+	struct mptcp_subflow_context *subflow;
+
+	/* Which options can be used together?
+	 *
+	 * X: mutually exclusive
+	 * O: often used together
+	 * C: can be used together in some cases
+	 * P: could be used together but we prefer not to (optimisations)
+	 *
+	 *  Opt: | MPC  | MPJ  | DSS  | ADD  |  RM  | PRIO | FAIL |  FC  |
+	 * ------|------|------|------|------|------|------|------|------|
+	 *  MPC  |------|------|------|------|------|------|------|------|
+	 *  MPJ  |  X   |------|------|------|------|------|------|------|
+	 *  DSS  |  X   |  X   |------|------|------|------|------|------|
+	 *  ADD  |  X   |  X   |  P   |------|------|------|------|------|
+	 *  RM   |  C   |  C   |  C   |  P   |------|------|------|------|
+	 *  PRIO |  X   |  C   |  C   |  C   |  C   |------|------|------|
+	 *  FAIL |  X   |  X   |  C   |  X   |  X   |  X   |------|------|
+	 *  FC   |  X   |  X   |  X   |  X   |  X   |  X   |  X   |------|
+	 *  RST  |  X   |  X   |  X   |  X   |  X   |  X   |  O   |  O   |
+	 * ------|------|------|------|------|------|------|------|------|
+	 *
+	 * The same applies in mptcp_established_options() function.
 	 */
 	if (likely(OPTION_MPTCP_DSS & opts->suboptions)) {
 		struct mptcp_ext *mpext = &opts->ext_copy;
@@ -1336,6 +1348,10 @@ void mptcp_write_options(__be32 *ptr, const struct tcp_sock *tp,
 			}
 			ptr += 1;
 		}
+
+		/* We might need to add MP_FAIL options in rare cases */
+		if (unlikely(OPTION_MPTCP_FAIL & opts->suboptions))
+			goto mp_fail;
 	} else if (OPTIONS_MPTCP_MPC & opts->suboptions) {
 		u8 len, flag = MPTCP_CAP_HMAC_SHA256;
 
@@ -1479,6 +1495,21 @@ void mptcp_write_options(__be32 *ptr, const struct tcp_sock *tp,
 		if (OPTION_MPTCP_RST & opts->suboptions)
 			goto mp_rst;
 		return;
+	} else if (unlikely(OPTION_MPTCP_FAIL & opts->suboptions)) {
+mp_fail:
+		/* MP_FAIL is mutually exclusive with others except RST */
+		subflow = mptcp_subflow_ctx(ssk);
+		subflow->send_mp_fail = 0;
+
+		*ptr++ = mptcp_option(MPTCPOPT_MP_FAIL,
+				      TCPOLEN_MPTCP_FAIL,
+				      0, 0);
+		put_unaligned_be64(opts->fail_seq, ptr);
+		ptr += 2;
+
+		if (OPTION_MPTCP_RST & opts->suboptions)
+			goto mp_rst;
+		return;
 	} else if (unlikely(OPTION_MPTCP_RST & opts->suboptions)) {
 mp_rst:
 		*ptr++ = mptcp_option(MPTCPOPT_RST,
@@ -1489,9 +1520,6 @@ mp_rst:
 	}
 
 	if (OPTION_MPTCP_PRIO & opts->suboptions) {
-		const struct sock *ssk = (const struct sock *)tp;
-		struct mptcp_subflow_context *subflow;
-
 		subflow = mptcp_subflow_ctx(ssk);
 		subflow->send_mp_prio = 0;
 
diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c
index 7bea318ac5f2..01809eef29b4 100644
--- a/net/mptcp/pm.c
+++ b/net/mptcp/pm.c
@@ -221,7 +221,7 @@ void mptcp_pm_add_addr_received(struct mptcp_sock *msk,
 }
 
 void mptcp_pm_add_addr_echoed(struct mptcp_sock *msk,
-			      struct mptcp_addr_info *addr)
+			      const struct mptcp_addr_info *addr)
 {
 	struct mptcp_pm_data *pm = &msk->pm;
 
@@ -279,14 +279,15 @@ void mptcp_pm_mp_fail_received(struct sock *sk, u64 fail_seq)
 
 /* path manager helpers */
 
-bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, struct sk_buff *skb,
+bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, const struct sk_buff *skb,
 			      unsigned int opt_size, unsigned int remaining,
 			      struct mptcp_addr_info *addr, bool *echo,
-			      bool *port, bool *drop_other_suboptions)
+			      bool *drop_other_suboptions)
 {
 	int ret = false;
 	u8 add_addr;
 	u8 family;
+	bool port;
 
 	spin_lock_bh(&msk->pm.lock);
 
@@ -304,10 +305,10 @@ bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, struct sk_buff *skb,
 	}
 
 	*echo = mptcp_pm_should_add_signal_echo(msk);
-	*port = !!(*echo ? msk->pm.remote.port : msk->pm.local.port);
+	port = !!(*echo ? msk->pm.remote.port : msk->pm.local.port);
 
 	family = *echo ? msk->pm.remote.family : msk->pm.local.family;
-	if (remaining < mptcp_add_addr_len(family, *echo, *port))
+	if (remaining < mptcp_add_addr_len(family, *echo, port))
 		goto out_unlock;
 
 	if (*echo) {
diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index 4b5d795383cd..b5e8de6f7507 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -83,16 +83,6 @@ static bool addresses_equal(const struct mptcp_addr_info *a,
 	return a->port == b->port;
 }
 
-static bool address_zero(const struct mptcp_addr_info *addr)
-{
-	struct mptcp_addr_info zero;
-
-	memset(&zero, 0, sizeof(zero));
-	zero.family = addr->family;
-
-	return addresses_equal(addr, &zero, true);
-}
-
 static void local_address(const struct sock_common *skc,
 			  struct mptcp_addr_info *addr)
 {
@@ -120,7 +110,7 @@ static void remote_address(const struct sock_common *skc,
 }
 
 static bool lookup_subflow_by_saddr(const struct list_head *list,
-				    struct mptcp_addr_info *saddr)
+				    const struct mptcp_addr_info *saddr)
 {
 	struct mptcp_subflow_context *subflow;
 	struct mptcp_addr_info cur;
@@ -138,7 +128,7 @@ static bool lookup_subflow_by_saddr(const struct list_head *list,
 }
 
 static bool lookup_subflow_by_daddr(const struct list_head *list,
-				    struct mptcp_addr_info *daddr)
+				    const struct mptcp_addr_info *daddr)
 {
 	struct mptcp_subflow_context *subflow;
 	struct mptcp_addr_info cur;
@@ -157,10 +147,10 @@ static bool lookup_subflow_by_daddr(const struct list_head *list,
 
 static struct mptcp_pm_addr_entry *
 select_local_address(const struct pm_nl_pernet *pernet,
-		     struct mptcp_sock *msk)
+		     const struct mptcp_sock *msk)
 {
+	const struct sock *sk = (const struct sock *)msk;
 	struct mptcp_pm_addr_entry *entry, *ret = NULL;
-	struct sock *sk = (struct sock *)msk;
 
 	msk_owned_by_me(msk);
 
@@ -190,7 +180,7 @@ select_local_address(const struct pm_nl_pernet *pernet,
 }
 
 static struct mptcp_pm_addr_entry *
-select_signal_address(struct pm_nl_pernet *pernet, struct mptcp_sock *msk)
+select_signal_address(struct pm_nl_pernet *pernet, const struct mptcp_sock *msk)
 {
 	struct mptcp_pm_addr_entry *entry, *ret = NULL;
 
@@ -214,16 +204,16 @@ select_signal_address(struct pm_nl_pernet *pernet, struct mptcp_sock *msk)
 	return ret;
 }
 
-unsigned int mptcp_pm_get_add_addr_signal_max(struct mptcp_sock *msk)
+unsigned int mptcp_pm_get_add_addr_signal_max(const struct mptcp_sock *msk)
 {
-	struct pm_nl_pernet *pernet;
+	const struct pm_nl_pernet *pernet;
 
-	pernet = net_generic(sock_net((struct sock *)msk), pm_nl_pernet_id);
+	pernet = net_generic(sock_net((const struct sock *)msk), pm_nl_pernet_id);
 	return READ_ONCE(pernet->add_addr_signal_max);
 }
 EXPORT_SYMBOL_GPL(mptcp_pm_get_add_addr_signal_max);
 
-unsigned int mptcp_pm_get_add_addr_accept_max(struct mptcp_sock *msk)
+unsigned int mptcp_pm_get_add_addr_accept_max(const struct mptcp_sock *msk)
 {
 	struct pm_nl_pernet *pernet;
 
@@ -232,7 +222,7 @@ unsigned int mptcp_pm_get_add_addr_accept_max(struct mptcp_sock *msk)
 }
 EXPORT_SYMBOL_GPL(mptcp_pm_get_add_addr_accept_max);
 
-unsigned int mptcp_pm_get_subflows_max(struct mptcp_sock *msk)
+unsigned int mptcp_pm_get_subflows_max(const struct mptcp_sock *msk)
 {
 	struct pm_nl_pernet *pernet;
 
@@ -241,7 +231,7 @@ unsigned int mptcp_pm_get_subflows_max(struct mptcp_sock *msk)
 }
 EXPORT_SYMBOL_GPL(mptcp_pm_get_subflows_max);
 
-unsigned int mptcp_pm_get_local_addr_max(struct mptcp_sock *msk)
+unsigned int mptcp_pm_get_local_addr_max(const struct mptcp_sock *msk)
 {
 	struct pm_nl_pernet *pernet;
 
@@ -264,8 +254,8 @@ bool mptcp_pm_nl_check_work_pending(struct mptcp_sock *msk)
 }
 
 struct mptcp_pm_add_entry *
-mptcp_lookup_anno_list_by_saddr(struct mptcp_sock *msk,
-				struct mptcp_addr_info *addr)
+mptcp_lookup_anno_list_by_saddr(const struct mptcp_sock *msk,
+				const struct mptcp_addr_info *addr)
 {
 	struct mptcp_pm_add_entry *entry;
 
@@ -346,7 +336,7 @@ out:
 
 struct mptcp_pm_add_entry *
 mptcp_pm_del_add_timer(struct mptcp_sock *msk,
-		       struct mptcp_addr_info *addr, bool check_id)
+		       const struct mptcp_addr_info *addr, bool check_id)
 {
 	struct mptcp_pm_add_entry *entry;
 	struct sock *sk = (struct sock *)msk;
@@ -364,7 +354,7 @@ mptcp_pm_del_add_timer(struct mptcp_sock *msk,
 }
 
 static bool mptcp_pm_alloc_anno_list(struct mptcp_sock *msk,
-				     struct mptcp_pm_addr_entry *entry)
+				     const struct mptcp_pm_addr_entry *entry)
 {
 	struct mptcp_pm_add_entry *add_entry = NULL;
 	struct sock *sk = (struct sock *)msk;
@@ -410,8 +400,8 @@ void mptcp_pm_free_anno_list(struct mptcp_sock *msk)
 	}
 }
 
-static bool lookup_address_in_vec(struct mptcp_addr_info *addrs, unsigned int nr,
-				  struct mptcp_addr_info *addr)
+static bool lookup_address_in_vec(const struct mptcp_addr_info *addrs, unsigned int nr,
+				  const struct mptcp_addr_info *addr)
 {
 	int i;
 
@@ -493,9 +483,9 @@ __lookup_addr(struct pm_nl_pernet *pernet, const struct mptcp_addr_info *info,
 }
 
 static int
-lookup_id_by_addr(struct pm_nl_pernet *pernet, const struct mptcp_addr_info *addr)
+lookup_id_by_addr(const struct pm_nl_pernet *pernet, const struct mptcp_addr_info *addr)
 {
-	struct mptcp_pm_addr_entry *entry;
+	const struct mptcp_pm_addr_entry *entry;
 	int ret = -1;
 
 	rcu_read_lock();
@@ -660,7 +650,6 @@ static void mptcp_pm_nl_add_addr_received(struct mptcp_sock *msk)
 	unsigned int add_addr_accept_max;
 	struct mptcp_addr_info remote;
 	unsigned int subflows_max;
-	bool reset_port = false;
 	int i, nr;
 
 	add_addr_accept_max = mptcp_pm_get_add_addr_accept_max(msk);
@@ -671,14 +660,15 @@ static void mptcp_pm_nl_add_addr_received(struct mptcp_sock *msk)
 		 msk->pm.remote.family);
 
 	remote = msk->pm.remote;
+	mptcp_pm_announce_addr(msk, &remote, true);
+	mptcp_pm_nl_addr_send_ack(msk);
+
 	if (lookup_subflow_by_daddr(&msk->conn_list, &remote))
-		goto add_addr_echo;
+		return;
 
 	/* pick id 0 port, if none is provided the remote address */
-	if (!remote.port) {
-		reset_port = true;
+	if (!remote.port)
 		remote.port = sk->sk_dport;
-	}
 
 	/* connect to the specified remote address, using whatever
 	 * local address the routing configuration will pick.
@@ -694,14 +684,6 @@ static void mptcp_pm_nl_add_addr_received(struct mptcp_sock *msk)
 	for (i = 0; i < nr; i++)
 		__mptcp_subflow_connect(sk, &addrs[i], &remote);
 	spin_lock_bh(&msk->pm.lock);
-
-	/* be sure to echo exactly the received address */
-	if (reset_port)
-		remote.port = 0;
-
-add_addr_echo:
-	mptcp_pm_announce_addr(msk, &remote, true);
-	mptcp_pm_nl_addr_send_ack(msk);
 }
 
 void mptcp_pm_nl_addr_send_ack(struct mptcp_sock *msk)
@@ -877,10 +859,18 @@ static bool address_use_port(struct mptcp_pm_addr_entry *entry)
 		MPTCP_PM_ADDR_FLAG_SIGNAL;
 }
 
+/* caller must ensure the RCU grace period is already elapsed */
+static void __mptcp_pm_release_addr_entry(struct mptcp_pm_addr_entry *entry)
+{
+	if (entry->lsk)
+		sock_release(entry->lsk);
+	kfree(entry);
+}
+
 static int mptcp_pm_nl_append_new_local_addr(struct pm_nl_pernet *pernet,
 					     struct mptcp_pm_addr_entry *entry)
 {
-	struct mptcp_pm_addr_entry *cur;
+	struct mptcp_pm_addr_entry *cur, *del_entry = NULL;
 	unsigned int addr_max;
 	int ret = -EINVAL;
 
@@ -901,8 +891,22 @@ static int mptcp_pm_nl_append_new_local_addr(struct pm_nl_pernet *pernet,
 	list_for_each_entry(cur, &pernet->local_addr_list, list) {
 		if (addresses_equal(&cur->addr, &entry->addr,
 				    address_use_port(entry) &&
-				    address_use_port(cur)))
-			goto out;
+				    address_use_port(cur))) {
+			/* allow replacing the exiting endpoint only if such
+			 * endpoint is an implicit one and the user-space
+			 * did not provide an endpoint id
+			 */
+			if (!(cur->flags & MPTCP_PM_ADDR_FLAG_IMPLICIT))
+				goto out;
+			if (entry->addr.id)
+				goto out;
+
+			pernet->addrs--;
+			entry->addr.id = cur->addr.id;
+			list_del_rcu(&cur->list);
+			del_entry = cur;
+			break;
+		}
 	}
 
 	if (!entry->addr.id) {
@@ -938,6 +942,12 @@ find_next:
 
 out:
 	spin_unlock_bh(&pernet->lock);
+
+	/* just replaced an existing entry, free it */
+	if (del_entry) {
+		synchronize_rcu();
+		__mptcp_pm_release_addr_entry(del_entry);
+	}
 	return ret;
 }
 
@@ -1011,9 +1021,6 @@ int mptcp_pm_nl_get_local_id(struct mptcp_sock *msk, struct sock_common *skc)
 	if (addresses_equal(&msk_local, &skc_local, false))
 		return 0;
 
-	if (address_zero(&skc_local))
-		return 0;
-
 	pernet = net_generic(sock_net((struct sock *)msk), pm_nl_pernet_id);
 
 	rcu_read_lock();
@@ -1036,7 +1043,7 @@ int mptcp_pm_nl_get_local_id(struct mptcp_sock *msk, struct sock_common *skc)
 	entry->addr.id = 0;
 	entry->addr.port = 0;
 	entry->ifindex = 0;
-	entry->flags = 0;
+	entry->flags = MPTCP_PM_ADDR_FLAG_IMPLICIT;
 	entry->lsk = NULL;
 	ret = mptcp_pm_nl_append_new_local_addr(pernet, entry);
 	if (ret < 0)
@@ -1197,14 +1204,8 @@ skip_family:
 	if (tb[MPTCP_PM_ADDR_ATTR_FLAGS])
 		entry->flags = nla_get_u32(tb[MPTCP_PM_ADDR_ATTR_FLAGS]);
 
-	if (tb[MPTCP_PM_ADDR_ATTR_PORT]) {
-		if (!(entry->flags & MPTCP_PM_ADDR_FLAG_SIGNAL)) {
-			NL_SET_ERR_MSG_ATTR(info->extack, attr,
-					    "flags must have signal when using port");
-			return -EINVAL;
-		}
+	if (tb[MPTCP_PM_ADDR_ATTR_PORT])
 		entry->addr.port = htons(nla_get_u16(tb[MPTCP_PM_ADDR_ATTR_PORT]));
-	}
 
 	return 0;
 }
@@ -1250,6 +1251,22 @@ static int mptcp_nl_cmd_add_addr(struct sk_buff *skb, struct genl_info *info)
 	if (ret < 0)
 		return ret;
 
+	if (addr.addr.port && !(addr.flags & MPTCP_PM_ADDR_FLAG_SIGNAL)) {
+		GENL_SET_ERR_MSG(info, "flags must have signal when using port");
+		return -EINVAL;
+	}
+
+	if (addr.flags & MPTCP_PM_ADDR_FLAG_SIGNAL &&
+	    addr.flags & MPTCP_PM_ADDR_FLAG_FULLMESH) {
+		GENL_SET_ERR_MSG(info, "flags mustn't have both signal and fullmesh");
+		return -EINVAL;
+	}
+
+	if (addr.flags & MPTCP_PM_ADDR_FLAG_IMPLICIT) {
+		GENL_SET_ERR_MSG(info, "can't create IMPLICIT endpoint");
+		return -EINVAL;
+	}
+
 	entry = kmalloc(sizeof(*entry), GFP_KERNEL);
 	if (!entry) {
 		GENL_SET_ERR_MSG(info, "can't allocate addr");
@@ -1301,7 +1318,7 @@ int mptcp_pm_get_flags_and_ifindex_by_id(struct net *net, unsigned int id,
 }
 
 static bool remove_anno_list_by_saddr(struct mptcp_sock *msk,
-				      struct mptcp_addr_info *addr)
+				      const struct mptcp_addr_info *addr)
 {
 	struct mptcp_pm_add_entry *entry;
 
@@ -1316,7 +1333,7 @@ static bool remove_anno_list_by_saddr(struct mptcp_sock *msk,
 }
 
 static bool mptcp_pm_remove_anno_addr(struct mptcp_sock *msk,
-				      struct mptcp_addr_info *addr,
+				      const struct mptcp_addr_info *addr,
 				      bool force)
 {
 	struct mptcp_rm_list list = { .nr = 0 };
@@ -1334,11 +1351,12 @@ static bool mptcp_pm_remove_anno_addr(struct mptcp_sock *msk,
 }
 
 static int mptcp_nl_remove_subflow_and_signal_addr(struct net *net,
-						   struct mptcp_addr_info *addr)
+						   const struct mptcp_pm_addr_entry *entry)
 {
-	struct mptcp_sock *msk;
-	long s_slot = 0, s_num = 0;
+	const struct mptcp_addr_info *addr = &entry->addr;
 	struct mptcp_rm_list list = { .nr = 0 };
+	long s_slot = 0, s_num = 0;
+	struct mptcp_sock *msk;
 
 	pr_debug("remove_id=%d", addr->id);
 
@@ -1355,7 +1373,8 @@ static int mptcp_nl_remove_subflow_and_signal_addr(struct net *net,
 
 		lock_sock(sk);
 		remove_subflow = lookup_subflow_by_saddr(&msk->conn_list, addr);
-		mptcp_pm_remove_anno_addr(msk, addr, remove_subflow);
+		mptcp_pm_remove_anno_addr(msk, addr, remove_subflow &&
+					  !(entry->flags & MPTCP_PM_ADDR_FLAG_IMPLICIT));
 		if (remove_subflow)
 			mptcp_pm_remove_subflow(msk, &list);
 		release_sock(sk);
@@ -1368,14 +1387,6 @@ next:
 	return 0;
 }
 
-/* caller must ensure the RCU grace period is already elapsed */
-static void __mptcp_pm_release_addr_entry(struct mptcp_pm_addr_entry *entry)
-{
-	if (entry->lsk)
-		sock_release(entry->lsk);
-	kfree(entry);
-}
-
 static int mptcp_nl_remove_id_zero_address(struct net *net,
 					   struct mptcp_addr_info *addr)
 {
@@ -1452,7 +1463,7 @@ static int mptcp_nl_cmd_del_addr(struct sk_buff *skb, struct genl_info *info)
 	__clear_bit(entry->addr.id, pernet->id_bitmap);
 	spin_unlock_bh(&pernet->lock);
 
-	mptcp_nl_remove_subflow_and_signal_addr(sock_net(skb->sk), &entry->addr);
+	mptcp_nl_remove_subflow_and_signal_addr(sock_net(skb->sk), entry);
 	synchronize_rcu();
 	__mptcp_pm_release_addr_entry(entry);
 
@@ -1467,14 +1478,12 @@ static void mptcp_pm_remove_addrs_and_subflows(struct mptcp_sock *msk,
 
 	list_for_each_entry(entry, rm_list, list) {
 		if (lookup_subflow_by_saddr(&msk->conn_list, &entry->addr) &&
-		    alist.nr < MPTCP_RM_IDS_MAX &&
-		    slist.nr < MPTCP_RM_IDS_MAX) {
-			alist.ids[alist.nr++] = entry->addr.id;
+		    slist.nr < MPTCP_RM_IDS_MAX)
 			slist.ids[slist.nr++] = entry->addr.id;
-		} else if (remove_anno_list_by_saddr(msk, &entry->addr) &&
-			 alist.nr < MPTCP_RM_IDS_MAX) {
+
+		if (remove_anno_list_by_saddr(msk, &entry->addr) &&
+		    alist.nr < MPTCP_RM_IDS_MAX)
 			alist.ids[alist.nr++] = entry->addr.id;
-		}
 	}
 
 	if (alist.nr) {
@@ -1751,9 +1760,20 @@ fail:
 	return -EMSGSIZE;
 }
 
-static int mptcp_nl_addr_backup(struct net *net,
-				struct mptcp_addr_info *addr,
-				u8 bkup)
+static void mptcp_pm_nl_fullmesh(struct mptcp_sock *msk,
+				 struct mptcp_addr_info *addr)
+{
+	struct mptcp_rm_list list = { .nr = 0 };
+
+	list.ids[list.nr++] = addr->id;
+
+	mptcp_pm_nl_rm_subflow_received(msk, &list);
+	mptcp_pm_create_subflow_or_signal_addr(msk);
+}
+
+static int mptcp_nl_set_flags(struct net *net,
+			      struct mptcp_addr_info *addr,
+			      u8 bkup, u8 changed)
 {
 	long s_slot = 0, s_num = 0;
 	struct mptcp_sock *msk;
@@ -1767,7 +1787,10 @@ static int mptcp_nl_addr_backup(struct net *net,
 
 		lock_sock(sk);
 		spin_lock_bh(&msk->pm.lock);
-		ret = mptcp_pm_nl_mp_prio_send_ack(msk, addr, bkup);
+		if (changed & MPTCP_PM_ADDR_FLAG_BACKUP)
+			ret = mptcp_pm_nl_mp_prio_send_ack(msk, addr, bkup);
+		if (changed & MPTCP_PM_ADDR_FLAG_FULLMESH)
+			mptcp_pm_nl_fullmesh(msk, addr);
 		spin_unlock_bh(&msk->pm.lock);
 		release_sock(sk);
 
@@ -1784,6 +1807,8 @@ static int mptcp_nl_cmd_set_flags(struct sk_buff *skb, struct genl_info *info)
 	struct mptcp_pm_addr_entry addr = { .addr = { .family = AF_UNSPEC }, }, *entry;
 	struct nlattr *attr = info->attrs[MPTCP_PM_ATTR_ADDR];
 	struct pm_nl_pernet *pernet = genl_info_pm_nl(info);
+	u8 changed, mask = MPTCP_PM_ADDR_FLAG_BACKUP |
+			   MPTCP_PM_ADDR_FLAG_FULLMESH;
 	struct net *net = sock_net(skb->sk);
 	u8 bkup = 0, lookup_by_id = 0;
 	int ret;
@@ -1806,15 +1831,18 @@ static int mptcp_nl_cmd_set_flags(struct sk_buff *skb, struct genl_info *info)
 		spin_unlock_bh(&pernet->lock);
 		return -EINVAL;
 	}
+	if ((addr.flags & MPTCP_PM_ADDR_FLAG_FULLMESH) &&
+	    (entry->flags & MPTCP_PM_ADDR_FLAG_SIGNAL)) {
+		spin_unlock_bh(&pernet->lock);
+		return -EINVAL;
+	}
 
-	if (bkup)
-		entry->flags |= MPTCP_PM_ADDR_FLAG_BACKUP;
-	else
-		entry->flags &= ~MPTCP_PM_ADDR_FLAG_BACKUP;
+	changed = (addr.flags ^ entry->flags) & mask;
+	entry->flags = (entry->flags & ~mask) | (addr.flags & mask);
 	addr = *entry;
 	spin_unlock_bh(&pernet->lock);
 
-	mptcp_nl_addr_backup(net, &addr.addr, bkup);
+	mptcp_nl_set_flags(net, &addr.addr, bkup, changed);
 	return 0;
 }
 
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 1c72f25f083e..0cbea3b6d0a4 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -117,6 +117,9 @@ static int __mptcp_socket_create(struct mptcp_sock *msk)
 	list_add(&subflow->node, &msk->conn_list);
 	sock_hold(ssock->sk);
 	subflow->request_mptcp = 1;
+
+	/* This is the first subflow, always with id 0 */
+	subflow->local_id_valid = 1;
 	mptcp_sock_graft(msk->first, sk->sk_socket);
 
 	return 0;
@@ -1196,6 +1199,7 @@ static struct sk_buff *__mptcp_alloc_tx_skb(struct sock *sk, struct sock *ssk, g
 		tcp_skb_entail(ssk, skb);
 		return skb;
 	}
+	tcp_skb_tsorted_anchor_cleanup(skb);
 	kfree_skb(skb);
 	return NULL;
 }
@@ -1356,6 +1360,7 @@ alloc_skb:
 out:
 	if (READ_ONCE(msk->csum_enabled))
 		mptcp_update_data_checksum(skb, copy);
+	trace_mptcp_sendmsg_frag(mpext);
 	mptcp_subflow_ctx(ssk)->rel_write_seq += copy;
 	return copy;
 }
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index 85317ce38e3f..3c1a3036550f 100644
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -442,7 +442,8 @@ struct mptcp_subflow_context {
 		rx_eof : 1,
 		can_ack : 1,        /* only after processing the remote a key */
 		disposable : 1,	    /* ctx can be free at ulp release time */
-		stale : 1;	    /* unable to snd/rcv data, do not use for xmit */
+		stale : 1,	    /* unable to snd/rcv data, do not use for xmit */
+		local_id_valid : 1; /* local_id is correctly initialized */
 	enum mptcp_data_avail data_avail;
 	u32	remote_nonce;
 	u64	thmac;
@@ -468,9 +469,7 @@ struct mptcp_subflow_context {
 	struct	sock *tcp_sock;	    /* tcp sk backpointer */
 	struct	sock *conn;	    /* parent mptcp_sock */
 	const	struct inet_connection_sock_af_ops *icsk_af_ops;
-	void	(*tcp_data_ready)(struct sock *sk);
 	void	(*tcp_state_change)(struct sock *sk);
-	void	(*tcp_write_space)(struct sock *sk);
 	void	(*tcp_error_report)(struct sock *sk);
 
 	struct	rcu_head rcu;
@@ -614,9 +613,9 @@ bool mptcp_subflow_active(struct mptcp_subflow_context *subflow);
 static inline void mptcp_subflow_tcp_fallback(struct sock *sk,
 					      struct mptcp_subflow_context *ctx)
 {
-	sk->sk_data_ready = ctx->tcp_data_ready;
+	sk->sk_data_ready = sock_def_readable;
 	sk->sk_state_change = ctx->tcp_state_change;
-	sk->sk_write_space = ctx->tcp_write_space;
+	sk->sk_write_space = sk_stream_write_space;
 	sk->sk_error_report = ctx->tcp_error_report;
 
 	inet_csk(sk)->icsk_af_ops = ctx->icsk_af_ops;
@@ -643,8 +642,7 @@ int __init mptcp_proto_v6_init(void);
 struct sock *mptcp_sk_clone(const struct sock *sk,
 			    const struct mptcp_options_received *mp_opt,
 			    struct request_sock *req);
-void mptcp_get_options(const struct sock *sk,
-		       const struct sk_buff *skb,
+void mptcp_get_options(const struct sk_buff *skb,
 		       struct mptcp_options_received *mp_opt);
 
 void mptcp_finish_connect(struct sock *sk);
@@ -743,7 +741,7 @@ void mptcp_pm_subflow_check_next(struct mptcp_sock *msk, const struct sock *ssk,
 void mptcp_pm_add_addr_received(struct mptcp_sock *msk,
 				const struct mptcp_addr_info *addr);
 void mptcp_pm_add_addr_echoed(struct mptcp_sock *msk,
-			      struct mptcp_addr_info *addr);
+			      const struct mptcp_addr_info *addr);
 void mptcp_pm_add_addr_send_ack(struct mptcp_sock *msk);
 void mptcp_pm_nl_addr_send_ack(struct mptcp_sock *msk);
 void mptcp_pm_rm_addr_received(struct mptcp_sock *msk,
@@ -754,10 +752,10 @@ void mptcp_pm_free_anno_list(struct mptcp_sock *msk);
 bool mptcp_pm_sport_in_anno_list(struct mptcp_sock *msk, const struct sock *sk);
 struct mptcp_pm_add_entry *
 mptcp_pm_del_add_timer(struct mptcp_sock *msk,
-		       struct mptcp_addr_info *addr, bool check_id);
+		       const struct mptcp_addr_info *addr, bool check_id);
 struct mptcp_pm_add_entry *
-mptcp_lookup_anno_list_by_saddr(struct mptcp_sock *msk,
-				struct mptcp_addr_info *addr);
+mptcp_lookup_anno_list_by_saddr(const struct mptcp_sock *msk,
+				const struct mptcp_addr_info *addr);
 int mptcp_pm_get_flags_and_ifindex_by_id(struct net *net, unsigned int id,
 					 u8 *flags, int *ifindex);
 
@@ -816,10 +814,10 @@ static inline int mptcp_rm_addr_len(const struct mptcp_rm_list *rm_list)
 	return TCPOLEN_MPTCP_RM_ADDR_BASE + roundup(rm_list->nr - 1, 4) + 1;
 }
 
-bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, struct sk_buff *skb,
+bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, const struct sk_buff *skb,
 			      unsigned int opt_size, unsigned int remaining,
 			      struct mptcp_addr_info *addr, bool *echo,
-			      bool *port, bool *drop_other_suboptions);
+			      bool *drop_other_suboptions);
 bool mptcp_pm_rm_addr_signal(struct mptcp_sock *msk, unsigned int remaining,
 			     struct mptcp_rm_list *rm_list);
 int mptcp_pm_get_local_id(struct mptcp_sock *msk, struct sock_common *skc);
@@ -830,10 +828,10 @@ void mptcp_pm_nl_work(struct mptcp_sock *msk);
 void mptcp_pm_nl_rm_subflow_received(struct mptcp_sock *msk,
 				     const struct mptcp_rm_list *rm_list);
 int mptcp_pm_nl_get_local_id(struct mptcp_sock *msk, struct sock_common *skc);
-unsigned int mptcp_pm_get_add_addr_signal_max(struct mptcp_sock *msk);
-unsigned int mptcp_pm_get_add_addr_accept_max(struct mptcp_sock *msk);
-unsigned int mptcp_pm_get_subflows_max(struct mptcp_sock *msk);
-unsigned int mptcp_pm_get_local_addr_max(struct mptcp_sock *msk);
+unsigned int mptcp_pm_get_add_addr_signal_max(const struct mptcp_sock *msk);
+unsigned int mptcp_pm_get_add_addr_accept_max(const struct mptcp_sock *msk);
+unsigned int mptcp_pm_get_subflows_max(const struct mptcp_sock *msk);
+unsigned int mptcp_pm_get_local_addr_max(const struct mptcp_sock *msk);
 
 void mptcp_sockopt_sync(struct mptcp_sock *msk, struct sock *ssk);
 void mptcp_sockopt_sync_locked(struct mptcp_sock *msk, struct sock *ssk);
diff --git a/net/mptcp/sockopt.c b/net/mptcp/sockopt.c
index dacf3cee0027..f949d22f52bd 100644
--- a/net/mptcp/sockopt.c
+++ b/net/mptcp/sockopt.c
@@ -343,6 +343,8 @@ static int mptcp_setsockopt_sol_socket(struct mptcp_sock *msk, int optname,
 	case SO_RCVLOWAT:
 	case SO_RCVTIMEO_OLD:
 	case SO_RCVTIMEO_NEW:
+	case SO_SNDTIMEO_OLD:
+	case SO_SNDTIMEO_NEW:
 	case SO_BUSY_POLL:
 	case SO_PREFER_BUSY_POLL:
 	case SO_BUSY_POLL_BUDGET:
diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index bea47a1180dc..aba260f547da 100644
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -153,7 +153,7 @@ static int subflow_check_req(struct request_sock *req,
 		return -EINVAL;
 #endif
 
-	mptcp_get_options(sk_listener, skb, &mp_opt);
+	mptcp_get_options(skb, &mp_opt);
 
 	opt_mp_capable = !!(mp_opt.suboptions & OPTIONS_MPTCP_MPC);
 	opt_mp_join = !!(mp_opt.suboptions & OPTIONS_MPTCP_MPJ);
@@ -250,7 +250,7 @@ int mptcp_subflow_init_cookie_req(struct request_sock *req,
 	int err;
 
 	subflow_init_req(req, sk_listener);
-	mptcp_get_options(sk_listener, skb, &mp_opt);
+	mptcp_get_options(skb, &mp_opt);
 
 	opt_mp_capable = !!(mp_opt.suboptions & OPTIONS_MPTCP_MPC);
 	opt_mp_join = !!(mp_opt.suboptions & OPTIONS_MPTCP_MPJ);
@@ -344,9 +344,7 @@ static bool subflow_thmac_valid(struct mptcp_subflow_context *subflow)
 
 	thmac = get_unaligned_be64(hmac);
 	pr_debug("subflow=%p, token=%u, thmac=%llu, subflow->thmac=%llu\n",
-		 subflow, subflow->token,
-		 (unsigned long long)thmac,
-		 (unsigned long long)subflow->thmac);
+		 subflow, subflow->token, thmac, subflow->thmac);
 
 	return thmac == subflow->thmac;
 }
@@ -410,7 +408,7 @@ static void subflow_finish_connect(struct sock *sk, const struct sk_buff *skb)
 	subflow->ssn_offset = TCP_SKB_CB(skb)->seq;
 	pr_debug("subflow=%p synack seq=%x", subflow, subflow->ssn_offset);
 
-	mptcp_get_options(sk, skb, &mp_opt);
+	mptcp_get_options(skb, &mp_opt);
 	if (subflow->request_mptcp) {
 		if (!(mp_opt.suboptions & OPTIONS_MPTCP_MPC)) {
 			MPTCP_INC_STATS(sock_net(sk),
@@ -483,9 +481,53 @@ do_reset:
 	mptcp_subflow_reset(sk);
 }
 
+static void subflow_set_local_id(struct mptcp_subflow_context *subflow, int local_id)
+{
+	subflow->local_id = local_id;
+	subflow->local_id_valid = 1;
+}
+
+static int subflow_chk_local_id(struct sock *sk)
+{
+	struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk);
+	struct mptcp_sock *msk = mptcp_sk(subflow->conn);
+	int err;
+
+	if (likely(subflow->local_id_valid))
+		return 0;
+
+	err = mptcp_pm_get_local_id(msk, (struct sock_common *)sk);
+	if (err < 0)
+		return err;
+
+	subflow_set_local_id(subflow, err);
+	return 0;
+}
+
+static int subflow_rebuild_header(struct sock *sk)
+{
+	int err = subflow_chk_local_id(sk);
+
+	if (unlikely(err < 0))
+		return err;
+
+	return inet_sk_rebuild_header(sk);
+}
+
+#if IS_ENABLED(CONFIG_MPTCP_IPV6)
+static int subflow_v6_rebuild_header(struct sock *sk)
+{
+	int err = subflow_chk_local_id(sk);
+
+	if (unlikely(err < 0))
+		return err;
+
+	return inet6_sk_rebuild_header(sk);
+}
+#endif
+
 struct request_sock_ops mptcp_subflow_request_sock_ops;
-EXPORT_SYMBOL_GPL(mptcp_subflow_request_sock_ops);
-static struct tcp_request_sock_ops subflow_request_sock_ipv4_ops;
+static struct tcp_request_sock_ops subflow_request_sock_ipv4_ops __ro_after_init;
 
 static int subflow_v4_conn_request(struct sock *sk, struct sk_buff *skb)
 {
@@ -506,9 +548,9 @@ drop:
 }
 
 #if IS_ENABLED(CONFIG_MPTCP_IPV6)
-static struct tcp_request_sock_ops subflow_request_sock_ipv6_ops;
-static struct inet_connection_sock_af_ops subflow_v6_specific;
-static struct inet_connection_sock_af_ops subflow_v6m_specific;
+static struct tcp_request_sock_ops subflow_request_sock_ipv6_ops __ro_after_init;
+static struct inet_connection_sock_af_ops subflow_v6_specific __ro_after_init;
+static struct inet_connection_sock_af_ops subflow_v6m_specific __ro_after_init;
 static struct proto tcpv6_prot_override;
 
 static int subflow_v6_conn_request(struct sock *sk, struct sk_buff *skb)
@@ -663,7 +705,7 @@ static struct sock *subflow_syn_recv_sock(const struct sock *sk,
 		 * reordered MPC will cause fallback, but we don't have other
 		 * options.
 		 */
-		mptcp_get_options(sk, skb, &mp_opt);
+		mptcp_get_options(skb, &mp_opt);
 		if (!(mp_opt.suboptions & OPTIONS_MPTCP_MPC)) {
 			fallback = true;
 			goto create_child;
@@ -673,7 +715,7 @@ static struct sock *subflow_syn_recv_sock(const struct sock *sk,
 		if (!new_msk)
 			fallback = true;
 	} else if (subflow_req->mp_join) {
-		mptcp_get_options(sk, skb, &mp_opt);
+		mptcp_get_options(skb, &mp_opt);
 		if (!(mp_opt.suboptions & OPTIONS_MPTCP_MPJ) ||
 		    !subflow_hmac_valid(req, &mp_opt) ||
 		    !mptcp_can_accept_new_subflow(subflow_req->msk)) {
@@ -790,7 +832,7 @@ dispose_child:
 	return child;
 }
 
-static struct inet_connection_sock_af_ops subflow_specific;
+static struct inet_connection_sock_af_ops subflow_specific __ro_after_init;
 static struct proto tcp_prot_override;
 
 enum mapping_status {
@@ -1107,7 +1149,7 @@ static bool subflow_check_data_avail(struct sock *ssk)
 	struct sk_buff *skb;
 
 	if (!skb_peek(&ssk->sk_receive_queue))
-		WRITE_ONCE(subflow->data_avail, 0);
+		WRITE_ONCE(subflow->data_avail, MPTCP_SUBFLOW_NODATA);
 	if (subflow->data_avail)
 		return true;
 
@@ -1172,7 +1214,7 @@ fallback:
 		subflow->reset_transient = 0;
 		subflow->reset_reason = MPTCP_RST_EMIDDLEBOX;
 		tcp_send_active_reset(ssk, GFP_ATOMIC);
-		WRITE_ONCE(subflow->data_avail, 0);
+		WRITE_ONCE(subflow->data_avail, MPTCP_SUBFLOW_NODATA);
 		return true;
 	}
 
@@ -1185,7 +1227,7 @@ fallback:
 		subflow->reset_transient = 0;
 		subflow->reset_reason = MPTCP_RST_EMPTCP;
 		tcp_send_active_reset(ssk, GFP_ATOMIC);
-		WRITE_ONCE(subflow->data_avail, 0);
+		WRITE_ONCE(subflow->data_avail, MPTCP_SUBFLOW_NODATA);
 		return false;
 	}
 
@@ -1207,7 +1249,7 @@ bool mptcp_subflow_data_available(struct sock *sk)
 	if (subflow->map_valid &&
 	    mptcp_subflow_get_map_offset(subflow) >= subflow->map_data_len) {
 		subflow->map_valid = 0;
-		WRITE_ONCE(subflow->data_avail, 0);
+		WRITE_ONCE(subflow->data_avail, MPTCP_SUBFLOW_NODATA);
 
 		pr_debug("Done with mapping: seq=%u data_len=%u",
 			 subflow->map_subflow_seq,
@@ -1311,7 +1353,7 @@ static void subflow_write_space(struct sock *ssk)
 	mptcp_write_space(sk);
 }
 
-static struct inet_connection_sock_af_ops *
+static const struct inet_connection_sock_af_ops *
 subflow_default_af_ops(struct sock *sk)
 {
 #if IS_ENABLED(CONFIG_MPTCP_IPV6)
@@ -1326,7 +1368,7 @@ void mptcpv6_handle_mapped(struct sock *sk, bool mapped)
 {
 	struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk);
 	struct inet_connection_sock *icsk = inet_csk(sk);
-	struct inet_connection_sock_af_ops *target;
+	const struct inet_connection_sock_af_ops *target;
 
 	target = mapped ? &subflow_v6m_specific : subflow_default_af_ops(sk);
 
@@ -1401,13 +1443,8 @@ int __mptcp_subflow_connect(struct sock *sk, const struct mptcp_addr_info *loc,
 		get_random_bytes(&subflow->local_nonce, sizeof(u32));
 	} while (!subflow->local_nonce);
 
-	if (!local_id) {
-		err = mptcp_pm_get_local_id(msk, (struct sock_common *)ssk);
-		if (err < 0)
-			goto failed;
-
-		local_id = err;
-	}
+	if (local_id)
+		subflow_set_local_id(subflow, local_id);
 
 	mptcp_pm_get_flags_and_ifindex_by_id(sock_net(sk), local_id,
 					     &flags, &ifindex);
@@ -1432,7 +1469,6 @@ int __mptcp_subflow_connect(struct sock *sk, const struct mptcp_addr_info *loc,
 	pr_debug("msk=%p remote_token=%u local_id=%d remote_id=%d", msk,
 		 remote_token, local_id, remote_id);
 	subflow->remote_token = remote_token;
-	subflow->local_id = local_id;
 	subflow->remote_id = remote_id;
 	subflow->request_join = 1;
 	subflow->request_bkup = !!(flags & MPTCP_PM_ADDR_FLAG_BACKUP);
@@ -1657,10 +1693,12 @@ static int subflow_ulp_init(struct sock *sk)
 	tp->is_mptcp = 1;
 	ctx->icsk_af_ops = icsk->icsk_af_ops;
 	icsk->icsk_af_ops = subflow_default_af_ops(sk);
-	ctx->tcp_data_ready = sk->sk_data_ready;
 	ctx->tcp_state_change = sk->sk_state_change;
-	ctx->tcp_write_space = sk->sk_write_space;
 	ctx->tcp_error_report = sk->sk_error_report;
+
+	WARN_ON_ONCE(sk->sk_data_ready != sock_def_readable);
+	WARN_ON_ONCE(sk->sk_write_space != sk_stream_write_space);
+
 	sk->sk_data_ready = subflow_data_ready;
 	sk->sk_write_space = subflow_write_space;
 	sk->sk_state_change = subflow_state_change;
@@ -1715,9 +1753,7 @@ static void subflow_ulp_clone(const struct request_sock *req,
 
 	new_ctx->conn_finished = 1;
 	new_ctx->icsk_af_ops = old_ctx->icsk_af_ops;
-	new_ctx->tcp_data_ready = old_ctx->tcp_data_ready;
 	new_ctx->tcp_state_change = old_ctx->tcp_state_change;
-	new_ctx->tcp_write_space = old_ctx->tcp_write_space;
 	new_ctx->tcp_error_report = old_ctx->tcp_error_report;
 	new_ctx->rel_write_seq = 1;
 	new_ctx->tcp_sock = newsk;
@@ -1731,15 +1767,22 @@ static void subflow_ulp_clone(const struct request_sock *req,
 		new_ctx->token = subflow_req->token;
 		new_ctx->ssn_offset = subflow_req->ssn_offset;
 		new_ctx->idsn = subflow_req->idsn;
+
+		/* this is the first subflow, id is always 0 */
+		new_ctx->local_id_valid = 1;
 	} else if (subflow_req->mp_join) {
 		new_ctx->ssn_offset = subflow_req->ssn_offset;
 		new_ctx->mp_join = 1;
 		new_ctx->fully_established = 1;
 		new_ctx->backup = subflow_req->backup;
-		new_ctx->local_id = subflow_req->local_id;
 		new_ctx->remote_id = subflow_req->remote_id;
 		new_ctx->token = subflow_req->token;
 		new_ctx->thmac = subflow_req->thmac;
+
+		/* the subflow req id is valid, fetched via subflow_check_req()
+		 * and subflow_token_join_request()
+		 */
+		subflow_set_local_id(new_ctx, subflow_req->local_id);
 	}
 }
 
@@ -1792,6 +1835,7 @@ void __init mptcp_subflow_init(void)
 	subflow_specific.conn_request = subflow_v4_conn_request;
 	subflow_specific.syn_recv_sock = subflow_syn_recv_sock;
 	subflow_specific.sk_rx_dst_set = subflow_finish_connect;
+	subflow_specific.rebuild_header = subflow_rebuild_header;
 
 	tcp_prot_override = tcp_prot;
 	tcp_prot_override.release_cb = tcp_release_cb_override;
@@ -1804,6 +1848,7 @@ void __init mptcp_subflow_init(void)
 	subflow_v6_specific.conn_request = subflow_v6_conn_request;
 	subflow_v6_specific.syn_recv_sock = subflow_syn_recv_sock;
 	subflow_v6_specific.sk_rx_dst_set = subflow_finish_connect;
+	subflow_v6_specific.rebuild_header = subflow_v6_rebuild_header;
 
 	subflow_v6m_specific = subflow_v6_specific;
 	subflow_v6m_specific.queue_xmit = ipv4_specific.queue_xmit;
@@ -1811,6 +1856,7 @@ void __init mptcp_subflow_init(void)
 	subflow_v6m_specific.net_header_len = ipv4_specific.net_header_len;
 	subflow_v6m_specific.mtu_reduced = ipv4_specific.mtu_reduced;
 	subflow_v6m_specific.net_frag_header_len = 0;
+	subflow_v6m_specific.rebuild_header = subflow_rebuild_header;
 
 	tcpv6_prot_override = tcpv6_prot;
 	tcpv6_prot_override.release_cb = tcp_release_cb_override;
diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
index a135b1a46014..238b6a620e88 100644
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -14,6 +14,11 @@ nf_conntrack-$(CONFIG_NF_CONNTRACK_LABELS) += nf_conntrack_labels.o
 nf_conntrack-$(CONFIG_NF_CT_PROTO_DCCP) += nf_conntrack_proto_dccp.o
 nf_conntrack-$(CONFIG_NF_CT_PROTO_SCTP) += nf_conntrack_proto_sctp.o
 nf_conntrack-$(CONFIG_NF_CT_PROTO_GRE) += nf_conntrack_proto_gre.o
+ifeq ($(CONFIG_NF_CONNTRACK),m)
+nf_conntrack-$(CONFIG_DEBUG_INFO_BTF_MODULES) += nf_conntrack_bpf.o
+else ifeq ($(CONFIG_NF_CONNTRACK),y)
+nf_conntrack-$(CONFIG_DEBUG_INFO_BTF) += nf_conntrack_bpf.o
+endif
 
 obj-$(CONFIG_NETFILTER) = netfilter.o
 
diff --git a/net/netfilter/core.c b/net/netfilter/core.c
index 8a77a3fd69bc..9a4feb922cf6 100644
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -622,7 +622,8 @@ int nf_hook_slow(struct sk_buff *skb, struct nf_hook_state *state,
 		case NF_ACCEPT:
 			break;
 		case NF_DROP:
-			kfree_skb(skb);
+			kfree_skb_reason(skb,
+					 SKB_DROP_REASON_NETFILTER_DROP);
 			ret = NF_DROP_GETERR(verdict);
 			if (ret == 0)
 				ret = -EPERM;
diff --git a/net/netfilter/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c
index d2e5a8f644b8..029171379884 100644
--- a/net/netfilter/ipvs/ip_vs_xmit.c
+++ b/net/netfilter/ipvs/ip_vs_xmit.c
@@ -610,7 +610,7 @@ static inline int ip_vs_tunnel_xmit_prepare(struct sk_buff *skb,
 		nf_reset_ct(skb);
 		skb_forward_csum(skb);
 		if (skb->dev)
-			skb->tstamp = 0;
+			skb_clear_tstamp(skb);
 	}
 	return ret;
 }
@@ -652,7 +652,7 @@ static inline int ip_vs_nat_send_or_cont(int pf, struct sk_buff *skb,
 	if (!local) {
 		skb_forward_csum(skb);
 		if (skb->dev)
-			skb->tstamp = 0;
+			skb_clear_tstamp(skb);
 		NF_HOOK(pf, NF_INET_LOCAL_OUT, cp->ipvs->net, NULL, skb,
 			NULL, skb_dst(skb)->dev, dst_output);
 	} else
@@ -674,7 +674,7 @@ static inline int ip_vs_send_or_cont(int pf, struct sk_buff *skb,
 		ip_vs_drop_early_demux_sk(skb);
 		skb_forward_csum(skb);
 		if (skb->dev)
-			skb->tstamp = 0;
+			skb_clear_tstamp(skb);
 		NF_HOOK(pf, NF_INET_LOCAL_OUT, cp->ipvs->net, NULL, skb,
 			NULL, skb_dst(skb)->dev, dst_output);
 	} else
diff --git a/net/netfilter/nf_conntrack_acct.c b/net/netfilter/nf_conntrack_acct.c
index 91bc8df3e4b0..385a5f458aba 100644
--- a/net/netfilter/nf_conntrack_acct.c
+++ b/net/netfilter/nf_conntrack_acct.c
@@ -22,26 +22,7 @@ static bool nf_ct_acct __read_mostly;
 module_param_named(acct, nf_ct_acct, bool, 0644);
 MODULE_PARM_DESC(acct, "Enable connection tracking flow accounting.");
 
-static const struct nf_ct_ext_type acct_extend = {
-	.len	= sizeof(struct nf_conn_acct),
-	.align	= __alignof__(struct nf_conn_acct),
-	.id	= NF_CT_EXT_ACCT,
-};
-
 void nf_conntrack_acct_pernet_init(struct net *net)
 {
 	net->ct.sysctl_acct = nf_ct_acct;
 }
-
-int nf_conntrack_acct_init(void)
-{
-	int ret = nf_ct_extend_register(&acct_extend);
-	if (ret < 0)
-		pr_err("Unable to register extension\n");
-	return ret;
-}
-
-void nf_conntrack_acct_fini(void)
-{
-	nf_ct_extend_unregister(&acct_extend);
-}
diff --git a/net/netfilter/nf_conntrack_bpf.c b/net/netfilter/nf_conntrack_bpf.c
new file mode 100644
index 000000000000..fe98673dd5ac
--- /dev/null
+++ b/net/netfilter/nf_conntrack_bpf.c
@@ -0,0 +1,258 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Unstable Conntrack Helpers for XDP and TC-BPF hook
+ *
+ * These are called from the XDP and SCHED_CLS BPF programs. Note that it is
+ * allowed to break compatibility for these functions since the interface they
+ * are exposed through to BPF programs is explicitly unstable.
+ */
+
+#include <linux/bpf.h>
+#include <linux/btf.h>
+#include <linux/types.h>
+#include <linux/btf_ids.h>
+#include <linux/net_namespace.h>
+#include <net/netfilter/nf_conntrack.h>
+#include <net/netfilter/nf_conntrack_bpf.h>
+#include <net/netfilter/nf_conntrack_core.h>
+
+/* bpf_ct_opts - Options for CT lookup helpers
+ *
+ * Members:
+ * @netns_id   - Specify the network namespace for lookup
+ *		 Values:
+ *		   BPF_F_CURRENT_NETNS (-1)
+ *		     Use namespace associated with ctx (xdp_md, __sk_buff)
+ *		   [0, S32_MAX]
+ *		     Network Namespace ID
+ * @error      - Out parameter, set for any errors encountered
+ *		 Values:
+ *		   -EINVAL - Passed NULL for bpf_tuple pointer
+ *		   -EINVAL - opts->reserved is not 0
+ *		   -EINVAL - netns_id is less than -1
+ *		   -EINVAL - opts__sz isn't NF_BPF_CT_OPTS_SZ (12)
+ *		   -EPROTO - l4proto isn't one of IPPROTO_TCP or IPPROTO_UDP
+ *		   -ENONET - No network namespace found for netns_id
+ *		   -ENOENT - Conntrack lookup could not find entry for tuple
+ *		   -EAFNOSUPPORT - tuple__sz isn't one of sizeof(tuple->ipv4)
+ *				   or sizeof(tuple->ipv6)
+ * @l4proto    - Layer 4 protocol
+ *		 Values:
+ *		   IPPROTO_TCP, IPPROTO_UDP
+ * @reserved   - Reserved member, will be reused for more options in future
+ *		 Values:
+ *		   0
+ */
+struct bpf_ct_opts {
+	s32 netns_id;
+	s32 error;
+	u8 l4proto;
+	u8 reserved[3];
+};
+
+enum {
+	NF_BPF_CT_OPTS_SZ = 12,
+};
+
+static struct nf_conn *__bpf_nf_ct_lookup(struct net *net,
+					  struct bpf_sock_tuple *bpf_tuple,
+					  u32 tuple_len, u8 protonum,
+					  s32 netns_id)
+{
+	struct nf_conntrack_tuple_hash *hash;
+	struct nf_conntrack_tuple tuple;
+
+	if (unlikely(protonum != IPPROTO_TCP && protonum != IPPROTO_UDP))
+		return ERR_PTR(-EPROTO);
+	if (unlikely(netns_id < BPF_F_CURRENT_NETNS))
+		return ERR_PTR(-EINVAL);
+
+	memset(&tuple, 0, sizeof(tuple));
+	switch (tuple_len) {
+	case sizeof(bpf_tuple->ipv4):
+		tuple.src.l3num = AF_INET;
+		tuple.src.u3.ip = bpf_tuple->ipv4.saddr;
+		tuple.src.u.tcp.port = bpf_tuple->ipv4.sport;
+		tuple.dst.u3.ip = bpf_tuple->ipv4.daddr;
+		tuple.dst.u.tcp.port = bpf_tuple->ipv4.dport;
+		break;
+	case sizeof(bpf_tuple->ipv6):
+		tuple.src.l3num = AF_INET6;
+		memcpy(tuple.src.u3.ip6, bpf_tuple->ipv6.saddr, sizeof(bpf_tuple->ipv6.saddr));
+		tuple.src.u.tcp.port = bpf_tuple->ipv6.sport;
+		memcpy(tuple.dst.u3.ip6, bpf_tuple->ipv6.daddr, sizeof(bpf_tuple->ipv6.daddr));
+		tuple.dst.u.tcp.port = bpf_tuple->ipv6.dport;
+		break;
+	default:
+		return ERR_PTR(-EAFNOSUPPORT);
+	}
+
+	tuple.dst.protonum = protonum;
+
+	if (netns_id >= 0) {
+		net = get_net_ns_by_id(net, netns_id);
+		if (unlikely(!net))
+			return ERR_PTR(-ENONET);
+	}
+
+	hash = nf_conntrack_find_get(net, &nf_ct_zone_dflt, &tuple);
+	if (netns_id >= 0)
+		put_net(net);
+	if (!hash)
+		return ERR_PTR(-ENOENT);
+	return nf_ct_tuplehash_to_ctrack(hash);
+}
+
+__diag_push();
+__diag_ignore_all("-Wmissing-prototypes",
+		  "Global functions as their definitions will be in nf_conntrack BTF");
+
+/* bpf_xdp_ct_lookup - Lookup CT entry for the given tuple, and acquire a
+ *		       reference to it
+ *
+ * Parameters:
+ * @xdp_ctx	- Pointer to ctx (xdp_md) in XDP program
+ *		    Cannot be NULL
+ * @bpf_tuple	- Pointer to memory representing the tuple to look up
+ *		    Cannot be NULL
+ * @tuple__sz	- Length of the tuple structure
+ *		    Must be one of sizeof(bpf_tuple->ipv4) or
+ *		    sizeof(bpf_tuple->ipv6)
+ * @opts	- Additional options for lookup (documented above)
+ *		    Cannot be NULL
+ * @opts__sz	- Length of the bpf_ct_opts structure
+ *		    Must be NF_BPF_CT_OPTS_SZ (12)
+ */
+struct nf_conn *
+bpf_xdp_ct_lookup(struct xdp_md *xdp_ctx, struct bpf_sock_tuple *bpf_tuple,
+		  u32 tuple__sz, struct bpf_ct_opts *opts, u32 opts__sz)
+{
+	struct xdp_buff *ctx = (struct xdp_buff *)xdp_ctx;
+	struct net *caller_net;
+	struct nf_conn *nfct;
+
+	BUILD_BUG_ON(sizeof(struct bpf_ct_opts) != NF_BPF_CT_OPTS_SZ);
+
+	if (!opts)
+		return NULL;
+	if (!bpf_tuple || opts->reserved[0] || opts->reserved[1] ||
+	    opts->reserved[2] || opts__sz != NF_BPF_CT_OPTS_SZ) {
+		opts->error = -EINVAL;
+		return NULL;
+	}
+	caller_net = dev_net(ctx->rxq->dev);
+	nfct = __bpf_nf_ct_lookup(caller_net, bpf_tuple, tuple__sz, opts->l4proto,
+				  opts->netns_id);
+	if (IS_ERR(nfct)) {
+		opts->error = PTR_ERR(nfct);
+		return NULL;
+	}
+	return nfct;
+}
+
+/* bpf_skb_ct_lookup - Lookup CT entry for the given tuple, and acquire a
+ *		       reference to it
+ *
+ * Parameters:
+ * @skb_ctx	- Pointer to ctx (__sk_buff) in TC program
+ *		    Cannot be NULL
+ * @bpf_tuple	- Pointer to memory representing the tuple to look up
+ *		    Cannot be NULL
+ * @tuple__sz	- Length of the tuple structure
+ *		    Must be one of sizeof(bpf_tuple->ipv4) or
+ *		    sizeof(bpf_tuple->ipv6)
+ * @opts	- Additional options for lookup (documented above)
+ *		    Cannot be NULL
+ * @opts__sz	- Length of the bpf_ct_opts structure
+ *		    Must be NF_BPF_CT_OPTS_SZ (12)
+ */
+struct nf_conn *
+bpf_skb_ct_lookup(struct __sk_buff *skb_ctx, struct bpf_sock_tuple *bpf_tuple,
+		  u32 tuple__sz, struct bpf_ct_opts *opts, u32 opts__sz)
+{
+	struct sk_buff *skb = (struct sk_buff *)skb_ctx;
+	struct net *caller_net;
+	struct nf_conn *nfct;
+
+	BUILD_BUG_ON(sizeof(struct bpf_ct_opts) != NF_BPF_CT_OPTS_SZ);
+
+	if (!opts)
+		return NULL;
+	if (!bpf_tuple || opts->reserved[0] || opts->reserved[1] ||
+	    opts->reserved[2] || opts__sz != NF_BPF_CT_OPTS_SZ) {
+		opts->error = -EINVAL;
+		return NULL;
+	}
+	caller_net = skb->dev ? dev_net(skb->dev) : sock_net(skb->sk);
+	nfct = __bpf_nf_ct_lookup(caller_net, bpf_tuple, tuple__sz, opts->l4proto,
+				  opts->netns_id);
+	if (IS_ERR(nfct)) {
+		opts->error = PTR_ERR(nfct);
+		return NULL;
+	}
+	return nfct;
+}
+
+/* bpf_ct_release - Release acquired nf_conn object
+ *
+ * This must be invoked for referenced PTR_TO_BTF_ID, and the verifier rejects
+ * the program if any references remain in the program in all of the explored
+ * states.
+ *
+ * Parameters:
+ * @nf_conn	 - Pointer to referenced nf_conn object, obtained using
+ *		   bpf_xdp_ct_lookup or bpf_skb_ct_lookup.
+ */
+void bpf_ct_release(struct nf_conn *nfct)
+{
+	if (!nfct)
+		return;
+	nf_ct_put(nfct);
+}
+
+__diag_pop()
+
+BTF_SET_START(nf_ct_xdp_check_kfunc_ids)
+BTF_ID(func, bpf_xdp_ct_lookup)
+BTF_ID(func, bpf_ct_release)
+BTF_SET_END(nf_ct_xdp_check_kfunc_ids)
+
+BTF_SET_START(nf_ct_tc_check_kfunc_ids)
+BTF_ID(func, bpf_skb_ct_lookup)
+BTF_ID(func, bpf_ct_release)
+BTF_SET_END(nf_ct_tc_check_kfunc_ids)
+
+BTF_SET_START(nf_ct_acquire_kfunc_ids)
+BTF_ID(func, bpf_xdp_ct_lookup)
+BTF_ID(func, bpf_skb_ct_lookup)
+BTF_SET_END(nf_ct_acquire_kfunc_ids)
+
+BTF_SET_START(nf_ct_release_kfunc_ids)
+BTF_ID(func, bpf_ct_release)
+BTF_SET_END(nf_ct_release_kfunc_ids)
+
+/* Both sets are identical */
+#define nf_ct_ret_null_kfunc_ids nf_ct_acquire_kfunc_ids
+
+static const struct btf_kfunc_id_set nf_conntrack_xdp_kfunc_set = {
+	.owner        = THIS_MODULE,
+	.check_set    = &nf_ct_xdp_check_kfunc_ids,
+	.acquire_set  = &nf_ct_acquire_kfunc_ids,
+	.release_set  = &nf_ct_release_kfunc_ids,
+	.ret_null_set = &nf_ct_ret_null_kfunc_ids,
+};
+
+static const struct btf_kfunc_id_set nf_conntrack_tc_kfunc_set = {
+	.owner        = THIS_MODULE,
+	.check_set    = &nf_ct_tc_check_kfunc_ids,
+	.acquire_set  = &nf_ct_acquire_kfunc_ids,
+	.release_set  = &nf_ct_release_kfunc_ids,
+	.ret_null_set = &nf_ct_ret_null_kfunc_ids,
+};
+
+int register_nf_conntrack_bpf(void)
+{
+	int ret;
+
+	ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_XDP, &nf_conntrack_xdp_kfunc_set);
+	return ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_SCHED_CLS, &nf_conntrack_tc_kfunc_set);
+}
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index bf1e17c678f1..0164e5f522e8 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -34,10 +34,10 @@
 #include <linux/rculist_nulls.h>
 
 #include <net/netfilter/nf_conntrack.h>
+#include <net/netfilter/nf_conntrack_bpf.h>
 #include <net/netfilter/nf_conntrack_l4proto.h>
 #include <net/netfilter/nf_conntrack_expect.h>
 #include <net/netfilter/nf_conntrack_helper.h>
-#include <net/netfilter/nf_conntrack_seqadj.h>
 #include <net/netfilter/nf_conntrack_core.h>
 #include <net/netfilter/nf_conntrack_extend.h>
 #include <net/netfilter/nf_conntrack_acct.h>
@@ -47,7 +47,6 @@
 #include <net/netfilter/nf_conntrack_timeout.h>
 #include <net/netfilter/nf_conntrack_labels.h>
 #include <net/netfilter/nf_conntrack_synproxy.h>
-#include <net/netfilter/nf_conntrack_act_ct.h>
 #include <net/netfilter/nf_nat.h>
 #include <net/netfilter/nf_nat_helper.h>
 #include <net/netns/hash.h>
@@ -67,6 +66,8 @@ EXPORT_SYMBOL_GPL(nf_conntrack_hash);
 struct conntrack_gc_work {
 	struct delayed_work	dwork;
 	u32			next_bucket;
+	u32			avg_timeout;
+	u32			start_time;
 	bool			exiting;
 	bool			early_drop;
 };
@@ -78,8 +79,19 @@ static __read_mostly bool nf_conntrack_locks_all;
 /* serialize hash resizes and nf_ct_iterate_cleanup */
 static DEFINE_MUTEX(nf_conntrack_mutex);
 
-#define GC_SCAN_INTERVAL	(120u * HZ)
+#define GC_SCAN_INTERVAL_MAX	(60ul * HZ)
+#define GC_SCAN_INTERVAL_MIN	(1ul * HZ)
+
+/* clamp timeouts to this value (TCP unacked) */
+#define GC_SCAN_INTERVAL_CLAMP	(300ul * HZ)
+
+/* large initial bias so that we don't scan often just because we have
+ * three entries with a 1s timeout.
+ */
+#define GC_SCAN_INTERVAL_INIT	INT_MAX
+
 #define GC_SCAN_MAX_DURATION	msecs_to_jiffies(10)
+#define GC_SCAN_EXPIRED_MAX	(64000u / HZ)
 
 #define MIN_CHAINLEN	8u
 #define MAX_CHAINLEN	(32u - MIN_CHAINLEN)
@@ -594,7 +606,7 @@ EXPORT_SYMBOL_GPL(nf_ct_tmpl_alloc);
 
 void nf_ct_tmpl_free(struct nf_conn *tmpl)
 {
-	nf_ct_ext_destroy(tmpl);
+	kfree(tmpl->ext);
 
 	if (ARCH_KMALLOC_MINALIGN <= NFCT_INFOMASK)
 		kfree((char *)tmpl - tmpl->proto.tmpl_padto);
@@ -1421,16 +1433,28 @@ static bool gc_worker_can_early_drop(const struct nf_conn *ct)
 
 static void gc_worker(struct work_struct *work)
 {
-	unsigned long end_time = jiffies + GC_SCAN_MAX_DURATION;
 	unsigned int i, hashsz, nf_conntrack_max95 = 0;
-	unsigned long next_run = GC_SCAN_INTERVAL;
+	u32 end_time, start_time = nfct_time_stamp;
 	struct conntrack_gc_work *gc_work;
+	unsigned int expired_count = 0;
+	unsigned long next_run;
+	s32 delta_time;
+
 	gc_work = container_of(work, struct conntrack_gc_work, dwork.work);
 
 	i = gc_work->next_bucket;
 	if (gc_work->early_drop)
 		nf_conntrack_max95 = nf_conntrack_max / 100u * 95u;
 
+	if (i == 0) {
+		gc_work->avg_timeout = GC_SCAN_INTERVAL_INIT;
+		gc_work->start_time = start_time;
+	}
+
+	next_run = gc_work->avg_timeout;
+
+	end_time = start_time + GC_SCAN_MAX_DURATION;
+
 	do {
 		struct nf_conntrack_tuple_hash *h;
 		struct hlist_nulls_head *ct_hash;
@@ -1447,6 +1471,7 @@ static void gc_worker(struct work_struct *work)
 
 		hlist_nulls_for_each_entry_rcu(h, n, &ct_hash[i], hnnode) {
 			struct nf_conntrack_net *cnet;
+			unsigned long expires;
 			struct net *net;
 
 			tmp = nf_ct_tuplehash_to_ctrack(h);
@@ -1456,11 +1481,29 @@ static void gc_worker(struct work_struct *work)
 				continue;
 			}
 
+			if (expired_count > GC_SCAN_EXPIRED_MAX) {
+				rcu_read_unlock();
+
+				gc_work->next_bucket = i;
+				gc_work->avg_timeout = next_run;
+
+				delta_time = nfct_time_stamp - gc_work->start_time;
+
+				/* re-sched immediately if total cycle time is exceeded */
+				next_run = delta_time < (s32)GC_SCAN_INTERVAL_MAX;
+				goto early_exit;
+			}
+
 			if (nf_ct_is_expired(tmp)) {
 				nf_ct_gc_expired(tmp);
+				expired_count++;
 				continue;
 			}
 
+			expires = clamp(nf_ct_expires(tmp), GC_SCAN_INTERVAL_MIN, GC_SCAN_INTERVAL_CLAMP);
+			next_run += expires;
+			next_run /= 2u;
+
 			if (nf_conntrack_max95 == 0 || gc_worker_skip_ct(tmp))
 				continue;
 
@@ -1478,8 +1521,10 @@ static void gc_worker(struct work_struct *work)
 				continue;
 			}
 
-			if (gc_worker_can_early_drop(tmp))
+			if (gc_worker_can_early_drop(tmp)) {
 				nf_ct_kill(tmp);
+				expired_count++;
+			}
 
 			nf_ct_put(tmp);
 		}
@@ -1492,33 +1537,38 @@ static void gc_worker(struct work_struct *work)
 		cond_resched();
 		i++;
 
-		if (time_after(jiffies, end_time) && i < hashsz) {
+		delta_time = nfct_time_stamp - end_time;
+		if (delta_time > 0 && i < hashsz) {
+			gc_work->avg_timeout = next_run;
 			gc_work->next_bucket = i;
 			next_run = 0;
-			break;
+			goto early_exit;
 		}
 	} while (i < hashsz);
 
+	gc_work->next_bucket = 0;
+
+	next_run = clamp(next_run, GC_SCAN_INTERVAL_MIN, GC_SCAN_INTERVAL_MAX);
+
+	delta_time = max_t(s32, nfct_time_stamp - gc_work->start_time, 1);
+	if (next_run > (unsigned long)delta_time)
+		next_run -= delta_time;
+	else
+		next_run = 1;
+
+early_exit:
 	if (gc_work->exiting)
 		return;
 
-	/*
-	 * Eviction will normally happen from the packet path, and not
-	 * from this gc worker.
-	 *
-	 * This worker is only here to reap expired entries when system went
-	 * idle after a busy period.
-	 */
-	if (next_run) {
+	if (next_run)
 		gc_work->early_drop = false;
-		gc_work->next_bucket = 0;
-	}
+
 	queue_delayed_work(system_power_efficient_wq, &gc_work->dwork, next_run);
 }
 
 static void conntrack_gc_work_init(struct conntrack_gc_work *gc_work)
 {
-	INIT_DEFERRABLE_WORK(&gc_work->dwork, gc_worker);
+	INIT_DELAYED_WORK(&gc_work->dwork, gc_worker);
 	gc_work->exiting = false;
 }
 
@@ -1597,7 +1647,17 @@ void nf_conntrack_free(struct nf_conn *ct)
 	 */
 	WARN_ON(refcount_read(&ct->ct_general.use) != 0);
 
-	nf_ct_ext_destroy(ct);
+	if (ct->status & IPS_SRC_NAT_DONE) {
+		const struct nf_nat_hook *nat_hook;
+
+		rcu_read_lock();
+		nat_hook = rcu_dereference(nf_nat_hook);
+		if (nat_hook)
+			nat_hook->remove_nat_bysrc(ct);
+		rcu_read_unlock();
+	}
+
+	kfree(ct->ext);
 	kmem_cache_free(nf_conntrack_cachep, ct);
 	cnet = nf_ct_pernet(net);
 
@@ -2464,13 +2524,7 @@ void nf_conntrack_cleanup_end(void)
 	kvfree(nf_conntrack_hash);
 
 	nf_conntrack_proto_fini();
-	nf_conntrack_seqadj_fini();
-	nf_conntrack_labels_fini();
 	nf_conntrack_helper_fini();
-	nf_conntrack_timeout_fini();
-	nf_conntrack_ecache_fini();
-	nf_conntrack_tstamp_fini();
-	nf_conntrack_acct_fini();
 	nf_conntrack_expect_fini();
 
 	kmem_cache_destroy(nf_conntrack_cachep);
@@ -2625,39 +2679,6 @@ int nf_conntrack_set_hashsize(const char *val, const struct kernel_param *kp)
 	return nf_conntrack_hash_resize(hashsize);
 }
 
-static __always_inline unsigned int total_extension_size(void)
-{
-	/* remember to add new extensions below */
-	BUILD_BUG_ON(NF_CT_EXT_NUM > 10);
-
-	return sizeof(struct nf_ct_ext) +
-	       sizeof(struct nf_conn_help)
-#if IS_ENABLED(CONFIG_NF_NAT)
-		+ sizeof(struct nf_conn_nat)
-#endif
-		+ sizeof(struct nf_conn_seqadj)
-		+ sizeof(struct nf_conn_acct)
-#ifdef CONFIG_NF_CONNTRACK_EVENTS
-		+ sizeof(struct nf_conntrack_ecache)
-#endif
-#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
-		+ sizeof(struct nf_conn_tstamp)
-#endif
-#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
-		+ sizeof(struct nf_conn_timeout)
-#endif
-#ifdef CONFIG_NF_CONNTRACK_LABELS
-		+ sizeof(struct nf_conn_labels)
-#endif
-#if IS_ENABLED(CONFIG_NETFILTER_SYNPROXY)
-		+ sizeof(struct nf_conn_synproxy)
-#endif
-#if IS_ENABLED(CONFIG_NET_ACT_CT)
-		+ sizeof(struct nf_conn_act_ct_ext)
-#endif
-	;
-};
-
 int nf_conntrack_init_start(void)
 {
 	unsigned long nr_pages = totalram_pages();
@@ -2665,9 +2686,6 @@ int nf_conntrack_init_start(void)
 	int ret = -ENOMEM;
 	int i;
 
-	/* struct nf_ct_ext uses u8 to store offsets/size */
-	BUILD_BUG_ON(total_extension_size() > 255u);
-
 	seqcount_spinlock_init(&nf_conntrack_generation,
 			       &nf_conntrack_locks_all_lock);
 
@@ -2712,34 +2730,10 @@ int nf_conntrack_init_start(void)
 	if (ret < 0)
 		goto err_expect;
 
-	ret = nf_conntrack_acct_init();
-	if (ret < 0)
-		goto err_acct;
-
-	ret = nf_conntrack_tstamp_init();
-	if (ret < 0)
-		goto err_tstamp;
-
-	ret = nf_conntrack_ecache_init();
-	if (ret < 0)
-		goto err_ecache;
-
-	ret = nf_conntrack_timeout_init();
-	if (ret < 0)
-		goto err_timeout;
-
 	ret = nf_conntrack_helper_init();
 	if (ret < 0)
 		goto err_helper;
 
-	ret = nf_conntrack_labels_init();
-	if (ret < 0)
-		goto err_labels;
-
-	ret = nf_conntrack_seqadj_init();
-	if (ret < 0)
-		goto err_seqadj;
-
 	ret = nf_conntrack_proto_init();
 	if (ret < 0)
 		goto err_proto;
@@ -2747,23 +2741,18 @@ int nf_conntrack_init_start(void)
 	conntrack_gc_work_init(&conntrack_gc_work);
 	queue_delayed_work(system_power_efficient_wq, &conntrack_gc_work.dwork, HZ);
 
+	ret = register_nf_conntrack_bpf();
+	if (ret < 0)
+		goto err_kfunc;
+
 	return 0;
 
+err_kfunc:
+	cancel_delayed_work_sync(&conntrack_gc_work.dwork);
+	nf_conntrack_proto_fini();
 err_proto:
-	nf_conntrack_seqadj_fini();
-err_seqadj:
-	nf_conntrack_labels_fini();
-err_labels:
 	nf_conntrack_helper_fini();
 err_helper:
-	nf_conntrack_timeout_fini();
-err_timeout:
-	nf_conntrack_ecache_fini();
-err_ecache:
-	nf_conntrack_tstamp_fini();
-err_tstamp:
-	nf_conntrack_acct_fini();
-err_acct:
 	nf_conntrack_expect_fini();
 err_expect:
 	kmem_cache_destroy(nf_conntrack_cachep);
diff --git a/net/netfilter/nf_conntrack_ecache.c b/net/netfilter/nf_conntrack_ecache.c
index 41768ff19464..07e65b4e92f8 100644
--- a/net/netfilter/nf_conntrack_ecache.c
+++ b/net/netfilter/nf_conntrack_ecache.c
@@ -131,13 +131,13 @@ static void ecache_work(struct work_struct *work)
 }
 
 static int __nf_conntrack_eventmask_report(struct nf_conntrack_ecache *e,
-					   const unsigned int events,
-					   const unsigned long missed,
+					   const u32 events,
+					   const u32 missed,
 					   const struct nf_ct_event *item)
 {
-	struct nf_conn *ct = item->ct;
 	struct net *net = nf_ct_net(item->ct);
 	struct nf_ct_event_notifier *notify;
+	u32 old, want;
 	int ret;
 
 	if (!((events | missed) & e->ctmask))
@@ -157,12 +157,13 @@ static int __nf_conntrack_eventmask_report(struct nf_conntrack_ecache *e,
 	if (likely(ret >= 0 && missed == 0))
 		return 0;
 
-	spin_lock_bh(&ct->lock);
-	if (ret < 0)
-		e->missed |= events;
-	else
-		e->missed &= ~missed;
-	spin_unlock_bh(&ct->lock);
+	do {
+		old = READ_ONCE(e->missed);
+		if (ret < 0)
+			want = old | events;
+		else
+			want = old & ~missed;
+	} while (cmpxchg(&e->missed, old, want) != old);
 
 	return ret;
 }
@@ -172,7 +173,7 @@ int nf_conntrack_eventmask_report(unsigned int events, struct nf_conn *ct,
 {
 	struct nf_conntrack_ecache *e;
 	struct nf_ct_event item;
-	unsigned long missed;
+	unsigned int missed;
 	int ret;
 
 	if (!nf_ct_is_confirmed(ct))
@@ -211,7 +212,7 @@ void nf_ct_deliver_cached_events(struct nf_conn *ct)
 {
 	struct nf_conntrack_ecache *e;
 	struct nf_ct_event item;
-	unsigned long events;
+	unsigned int events;
 
 	if (!nf_ct_is_confirmed(ct) || nf_ct_is_dying(ct))
 		return;
@@ -304,12 +305,6 @@ void nf_conntrack_ecache_work(struct net *net, enum nf_ct_ecache_state state)
 #define NF_CT_EVENTS_DEFAULT 1
 static int nf_ct_events __read_mostly = NF_CT_EVENTS_DEFAULT;
 
-static const struct nf_ct_ext_type event_extend = {
-	.len	= sizeof(struct nf_conntrack_ecache),
-	.align	= __alignof__(struct nf_conntrack_ecache),
-	.id	= NF_CT_EXT_ECACHE,
-};
-
 void nf_conntrack_ecache_pernet_init(struct net *net)
 {
 	struct nf_conntrack_net *cnet = nf_ct_pernet(net);
@@ -317,6 +312,8 @@ void nf_conntrack_ecache_pernet_init(struct net *net)
 	net->ct.sysctl_events = nf_ct_events;
 	cnet->ct_net = &net->ct;
 	INIT_DELAYED_WORK(&cnet->ecache_dwork, ecache_work);
+
+	BUILD_BUG_ON(__IPCT_MAX >= 16);	/* e->ctmask is u16 */
 }
 
 void nf_conntrack_ecache_pernet_fini(struct net *net)
@@ -325,19 +322,3 @@ void nf_conntrack_ecache_pernet_fini(struct net *net)
 
 	cancel_delayed_work_sync(&cnet->ecache_dwork);
 }
-
-int nf_conntrack_ecache_init(void)
-{
-	int ret = nf_ct_extend_register(&event_extend);
-	if (ret < 0)
-		pr_err("Unable to register event extension\n");
-
-	BUILD_BUG_ON(__IPCT_MAX >= 16);	/* ctmask, missed use u16 */
-
-	return ret;
-}
-
-void nf_conntrack_ecache_fini(void)
-{
-	nf_ct_extend_unregister(&event_extend);
-}
diff --git a/net/netfilter/nf_conntrack_extend.c b/net/netfilter/nf_conntrack_extend.c
index 3dbe2329c3f1..1296fda54ac6 100644
--- a/net/netfilter/nf_conntrack_extend.c
+++ b/net/netfilter/nf_conntrack_extend.c
@@ -13,40 +13,90 @@
 #include <linux/skbuff.h>
 #include <net/netfilter/nf_conntrack_extend.h>
 
-static struct nf_ct_ext_type __rcu *nf_ct_ext_types[NF_CT_EXT_NUM];
-static DEFINE_MUTEX(nf_ct_ext_type_mutex);
+#include <net/netfilter/nf_conntrack_helper.h>
+#include <net/netfilter/nf_conntrack_acct.h>
+#include <net/netfilter/nf_conntrack_seqadj.h>
+#include <net/netfilter/nf_conntrack_ecache.h>
+#include <net/netfilter/nf_conntrack_zones.h>
+#include <net/netfilter/nf_conntrack_timestamp.h>
+#include <net/netfilter/nf_conntrack_timeout.h>
+#include <net/netfilter/nf_conntrack_labels.h>
+#include <net/netfilter/nf_conntrack_synproxy.h>
+#include <net/netfilter/nf_conntrack_act_ct.h>
+#include <net/netfilter/nf_nat.h>
+
 #define NF_CT_EXT_PREALLOC	128u /* conntrack events are on by default */
 
-void nf_ct_ext_destroy(struct nf_conn *ct)
+static const u8 nf_ct_ext_type_len[NF_CT_EXT_NUM] = {
+	[NF_CT_EXT_HELPER] = sizeof(struct nf_conn_help),
+#if IS_ENABLED(CONFIG_NF_NAT)
+	[NF_CT_EXT_NAT] = sizeof(struct nf_conn_nat),
+#endif
+	[NF_CT_EXT_SEQADJ] = sizeof(struct nf_conn_seqadj),
+	[NF_CT_EXT_ACCT] = sizeof(struct nf_conn_acct),
+#ifdef CONFIG_NF_CONNTRACK_EVENTS
+	[NF_CT_EXT_ECACHE] = sizeof(struct nf_conntrack_ecache),
+#endif
+#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
+	[NF_CT_EXT_TSTAMP] = sizeof(struct nf_conn_acct),
+#endif
+#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
+	[NF_CT_EXT_TIMEOUT] = sizeof(struct nf_conn_tstamp),
+#endif
+#ifdef CONFIG_NF_CONNTRACK_LABELS
+	[NF_CT_EXT_LABELS] = sizeof(struct nf_conn_labels),
+#endif
+#if IS_ENABLED(CONFIG_NETFILTER_SYNPROXY)
+	[NF_CT_EXT_SYNPROXY] = sizeof(struct nf_conn_synproxy),
+#endif
+#if IS_ENABLED(CONFIG_NET_ACT_CT)
+	[NF_CT_EXT_ACT_CT] = sizeof(struct nf_conn_act_ct_ext),
+#endif
+};
+
+static __always_inline unsigned int total_extension_size(void)
 {
-	unsigned int i;
-	struct nf_ct_ext_type *t;
-
-	for (i = 0; i < NF_CT_EXT_NUM; i++) {
-		rcu_read_lock();
-		t = rcu_dereference(nf_ct_ext_types[i]);
-
-		/* Here the nf_ct_ext_type might have been unregisterd.
-		 * I.e., it has responsible to cleanup private
-		 * area in all conntracks when it is unregisterd.
-		 */
-		if (t && t->destroy)
-			t->destroy(ct);
-		rcu_read_unlock();
-	}
-
-	kfree(ct->ext);
+	/* remember to add new extensions below */
+	BUILD_BUG_ON(NF_CT_EXT_NUM > 10);
+
+	return sizeof(struct nf_ct_ext) +
+	       sizeof(struct nf_conn_help)
+#if IS_ENABLED(CONFIG_NF_NAT)
+		+ sizeof(struct nf_conn_nat)
+#endif
+		+ sizeof(struct nf_conn_seqadj)
+		+ sizeof(struct nf_conn_acct)
+#ifdef CONFIG_NF_CONNTRACK_EVENTS
+		+ sizeof(struct nf_conntrack_ecache)
+#endif
+#ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
+		+ sizeof(struct nf_conn_tstamp)
+#endif
+#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
+		+ sizeof(struct nf_conn_timeout)
+#endif
+#ifdef CONFIG_NF_CONNTRACK_LABELS
+		+ sizeof(struct nf_conn_labels)
+#endif
+#if IS_ENABLED(CONFIG_NETFILTER_SYNPROXY)
+		+ sizeof(struct nf_conn_synproxy)
+#endif
+#if IS_ENABLED(CONFIG_NET_ACT_CT)
+		+ sizeof(struct nf_conn_act_ct_ext)
+#endif
+	;
 }
 
 void *nf_ct_ext_add(struct nf_conn *ct, enum nf_ct_ext_id id, gfp_t gfp)
 {
 	unsigned int newlen, newoff, oldlen, alloc;
-	struct nf_ct_ext_type *t;
 	struct nf_ct_ext *new;
 
 	/* Conntrack must not be confirmed to avoid races on reallocation. */
 	WARN_ON(nf_ct_is_confirmed(ct));
 
+	/* struct nf_ct_ext uses u8 to store offsets/size */
+	BUILD_BUG_ON(total_extension_size() > 255u);
 
 	if (ct->ext) {
 		const struct nf_ct_ext *old = ct->ext;
@@ -58,16 +108,8 @@ void *nf_ct_ext_add(struct nf_conn *ct, enum nf_ct_ext_id id, gfp_t gfp)
 		oldlen = sizeof(*new);
 	}
 
-	rcu_read_lock();
-	t = rcu_dereference(nf_ct_ext_types[id]);
-	if (!t) {
-		rcu_read_unlock();
-		return NULL;
-	}
-
-	newoff = ALIGN(oldlen, t->align);
-	newlen = newoff + t->len;
-	rcu_read_unlock();
+	newoff = ALIGN(oldlen, __alignof__(struct nf_ct_ext));
+	newlen = newoff + nf_ct_ext_type_len[id];
 
 	alloc = max(newlen, NF_CT_EXT_PREALLOC);
 	new = krealloc(ct->ext, alloc, gfp);
@@ -85,31 +127,3 @@ void *nf_ct_ext_add(struct nf_conn *ct, enum nf_ct_ext_id id, gfp_t gfp)
 	return (void *)new + newoff;
 }
 EXPORT_SYMBOL(nf_ct_ext_add);
-
-/* This MUST be called in process context. */
-int nf_ct_extend_register(const struct nf_ct_ext_type *type)
-{
-	int ret = 0;
-
-	mutex_lock(&nf_ct_ext_type_mutex);
-	if (nf_ct_ext_types[type->id]) {
-		ret = -EBUSY;
-		goto out;
-	}
-
-	rcu_assign_pointer(nf_ct_ext_types[type->id], type);
-out:
-	mutex_unlock(&nf_ct_ext_type_mutex);
-	return ret;
-}
-EXPORT_SYMBOL_GPL(nf_ct_extend_register);
-
-/* This MUST be called in process context. */
-void nf_ct_extend_unregister(const struct nf_ct_ext_type *type)
-{
-	mutex_lock(&nf_ct_ext_type_mutex);
-	RCU_INIT_POINTER(nf_ct_ext_types[type->id], NULL);
-	mutex_unlock(&nf_ct_ext_type_mutex);
-	synchronize_rcu();
-}
-EXPORT_SYMBOL_GPL(nf_ct_extend_unregister);
diff --git a/net/netfilter/nf_conntrack_helper.c b/net/netfilter/nf_conntrack_helper.c
index ae4488a13c70..8dec42ec603e 100644
--- a/net/netfilter/nf_conntrack_helper.c
+++ b/net/netfilter/nf_conntrack_helper.c
@@ -550,11 +550,11 @@ void nf_nat_helper_unregister(struct nf_conntrack_nat_helper *nat)
 }
 EXPORT_SYMBOL_GPL(nf_nat_helper_unregister);
 
-static const struct nf_ct_ext_type helper_extend = {
-	.len	= sizeof(struct nf_conn_help),
-	.align	= __alignof__(struct nf_conn_help),
-	.id	= NF_CT_EXT_HELPER,
-};
+void nf_ct_set_auto_assign_helper_warned(struct net *net)
+{
+	nf_ct_pernet(net)->auto_assign_helper_warned = true;
+}
+EXPORT_SYMBOL_GPL(nf_ct_set_auto_assign_helper_warned);
 
 void nf_conntrack_helper_pernet_init(struct net *net)
 {
@@ -565,28 +565,17 @@ void nf_conntrack_helper_pernet_init(struct net *net)
 
 int nf_conntrack_helper_init(void)
 {
-	int ret;
 	nf_ct_helper_hsize = 1; /* gets rounded up to use one page */
 	nf_ct_helper_hash =
 		nf_ct_alloc_hashtable(&nf_ct_helper_hsize, 0);
 	if (!nf_ct_helper_hash)
 		return -ENOMEM;
 
-	ret = nf_ct_extend_register(&helper_extend);
-	if (ret < 0) {
-		pr_err("nf_ct_helper: Unable to register helper extension.\n");
-		goto out_extend;
-	}
-
 	INIT_LIST_HEAD(&nf_ct_nat_helpers);
 	return 0;
-out_extend:
-	kvfree(nf_ct_helper_hash);
-	return ret;
 }
 
 void nf_conntrack_helper_fini(void)
 {
-	nf_ct_extend_unregister(&helper_extend);
 	kvfree(nf_ct_helper_hash);
 }
diff --git a/net/netfilter/nf_conntrack_labels.c b/net/netfilter/nf_conntrack_labels.c
index 522792556632..6e70e137a0a6 100644
--- a/net/netfilter/nf_conntrack_labels.c
+++ b/net/netfilter/nf_conntrack_labels.c
@@ -67,6 +67,8 @@ int nf_connlabels_get(struct net *net, unsigned int bits)
 	net->ct.labels_used++;
 	spin_unlock(&nf_connlabels_lock);
 
+	BUILD_BUG_ON(NF_CT_LABELS_MAX_SIZE / sizeof(long) >= U8_MAX);
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(nf_connlabels_get);
@@ -78,21 +80,3 @@ void nf_connlabels_put(struct net *net)
 	spin_unlock(&nf_connlabels_lock);
 }
 EXPORT_SYMBOL_GPL(nf_connlabels_put);
-
-static const struct nf_ct_ext_type labels_extend = {
-	.len    = sizeof(struct nf_conn_labels),
-	.align  = __alignof__(struct nf_conn_labels),
-	.id     = NF_CT_EXT_LABELS,
-};
-
-int nf_conntrack_labels_init(void)
-{
-	BUILD_BUG_ON(NF_CT_LABELS_MAX_SIZE / sizeof(long) >= U8_MAX);
-
-	return nf_ct_extend_register(&labels_extend);
-}
-
-void nf_conntrack_labels_fini(void)
-{
-	nf_ct_extend_unregister(&labels_extend);
-}
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 7032402ffd33..1ea2ad732d57 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -58,6 +58,12 @@
 
 MODULE_LICENSE("GPL");
 
+struct ctnetlink_list_dump_ctx {
+	struct nf_conn *last;
+	unsigned int cpu;
+	bool done;
+};
+
 static int ctnetlink_dump_tuples_proto(struct sk_buff *skb,
 				const struct nf_conntrack_tuple *tuple,
 				const struct nf_conntrack_l4proto *l4proto)
@@ -1694,14 +1700,18 @@ static int ctnetlink_get_conntrack(struct sk_buff *skb,
 
 static int ctnetlink_done_list(struct netlink_callback *cb)
 {
-	if (cb->args[1])
-		nf_ct_put((struct nf_conn *)cb->args[1]);
+	struct ctnetlink_list_dump_ctx *ctx = (void *)cb->ctx;
+
+	if (ctx->last)
+		nf_ct_put(ctx->last);
+
 	return 0;
 }
 
 static int
 ctnetlink_dump_list(struct sk_buff *skb, struct netlink_callback *cb, bool dying)
 {
+	struct ctnetlink_list_dump_ctx *ctx = (void *)cb->ctx;
 	struct nf_conn *ct, *last;
 	struct nf_conntrack_tuple_hash *h;
 	struct hlist_nulls_node *n;
@@ -1712,12 +1722,12 @@ ctnetlink_dump_list(struct sk_buff *skb, struct netlink_callback *cb, bool dying
 	struct hlist_nulls_head *list;
 	struct net *net = sock_net(skb->sk);
 
-	if (cb->args[2])
+	if (ctx->done)
 		return 0;
 
-	last = (struct nf_conn *)cb->args[1];
+	last = ctx->last;
 
-	for (cpu = cb->args[0]; cpu < nr_cpu_ids; cpu++) {
+	for (cpu = ctx->cpu; cpu < nr_cpu_ids; cpu++) {
 		struct ct_pcpu *pcpu;
 
 		if (!cpu_possible(cpu))
@@ -1731,10 +1741,10 @@ restart:
 			ct = nf_ct_tuplehash_to_ctrack(h);
 			if (l3proto && nf_ct_l3num(ct) != l3proto)
 				continue;
-			if (cb->args[1]) {
+			if (ctx->last) {
 				if (ct != last)
 					continue;
-				cb->args[1] = 0;
+				ctx->last = NULL;
 			}
 
 			/* We can't dump extension info for the unconfirmed
@@ -1751,19 +1761,19 @@ restart:
 			if (res < 0) {
 				if (!refcount_inc_not_zero(&ct->ct_general.use))
 					continue;
-				cb->args[0] = cpu;
-				cb->args[1] = (unsigned long)ct;
+				ctx->cpu = cpu;
+				ctx->last = ct;
 				spin_unlock_bh(&pcpu->lock);
 				goto out;
 			}
 		}
-		if (cb->args[1]) {
-			cb->args[1] = 0;
+		if (ctx->last) {
+			ctx->last = NULL;
 			goto restart;
 		}
 		spin_unlock_bh(&pcpu->lock);
 	}
-	cb->args[2] = 1;
+	ctx->done = true;
 out:
 	if (last)
 		nf_ct_put(last);
@@ -3878,6 +3888,8 @@ static int __init ctnetlink_init(void)
 {
 	int ret;
 
+	BUILD_BUG_ON(sizeof(struct ctnetlink_list_dump_ctx) > sizeof_field(struct netlink_callback, ctx));
+
 	ret = nfnetlink_subsys_register(&ctnl_subsys);
 	if (ret < 0) {
 		pr_err("ctnetlink_init: cannot register with nfnetlink.\n");
diff --git a/net/netfilter/nf_conntrack_pptp.c b/net/netfilter/nf_conntrack_pptp.c
index 7d5708b92138..f3fa367b455f 100644
--- a/net/netfilter/nf_conntrack_pptp.c
+++ b/net/netfilter/nf_conntrack_pptp.c
@@ -45,30 +45,8 @@ MODULE_ALIAS_NFCT_HELPER("pptp");
 
 static DEFINE_SPINLOCK(nf_pptp_lock);
 
-int
-(*nf_nat_pptp_hook_outbound)(struct sk_buff *skb,
-			     struct nf_conn *ct, enum ip_conntrack_info ctinfo,
-			     unsigned int protoff, struct PptpControlHeader *ctlh,
-			     union pptp_ctrl_union *pptpReq) __read_mostly;
-EXPORT_SYMBOL_GPL(nf_nat_pptp_hook_outbound);
-
-int
-(*nf_nat_pptp_hook_inbound)(struct sk_buff *skb,
-			    struct nf_conn *ct, enum ip_conntrack_info ctinfo,
-			    unsigned int protoff, struct PptpControlHeader *ctlh,
-			    union pptp_ctrl_union *pptpReq) __read_mostly;
-EXPORT_SYMBOL_GPL(nf_nat_pptp_hook_inbound);
-
-void
-(*nf_nat_pptp_hook_exp_gre)(struct nf_conntrack_expect *expect_orig,
-			    struct nf_conntrack_expect *expect_reply)
-			    __read_mostly;
-EXPORT_SYMBOL_GPL(nf_nat_pptp_hook_exp_gre);
-
-void
-(*nf_nat_pptp_hook_expectfn)(struct nf_conn *ct,
-			     struct nf_conntrack_expect *exp) __read_mostly;
-EXPORT_SYMBOL_GPL(nf_nat_pptp_hook_expectfn);
+const struct nf_nat_pptp_hook *nf_nat_pptp_hook;
+EXPORT_SYMBOL_GPL(nf_nat_pptp_hook);
 
 #if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG)
 /* PptpControlMessageType names */
@@ -111,8 +89,8 @@ EXPORT_SYMBOL(pptp_msg_name);
 static void pptp_expectfn(struct nf_conn *ct,
 			 struct nf_conntrack_expect *exp)
 {
+	const struct nf_nat_pptp_hook *hook;
 	struct net *net = nf_ct_net(ct);
-	typeof(nf_nat_pptp_hook_expectfn) nf_nat_pptp_expectfn;
 	pr_debug("increasing timeouts\n");
 
 	/* increase timeout of GRE data channel conntrack entry */
@@ -122,9 +100,9 @@ static void pptp_expectfn(struct nf_conn *ct,
 	/* Can you see how rusty this code is, compared with the pre-2.6.11
 	 * one? That's what happened to my shiny newnat of 2002 ;( -HW */
 
-	nf_nat_pptp_expectfn = rcu_dereference(nf_nat_pptp_hook_expectfn);
-	if (nf_nat_pptp_expectfn && ct->master->status & IPS_NAT_MASK)
-		nf_nat_pptp_expectfn(ct, exp);
+	hook = rcu_dereference(nf_nat_pptp_hook);
+	if (hook && ct->master->status & IPS_NAT_MASK)
+		hook->expectfn(ct, exp);
 	else {
 		struct nf_conntrack_tuple inv_t;
 		struct nf_conntrack_expect *exp_other;
@@ -209,9 +187,9 @@ static void pptp_destroy_siblings(struct nf_conn *ct)
 static int exp_gre(struct nf_conn *ct, __be16 callid, __be16 peer_callid)
 {
 	struct nf_conntrack_expect *exp_orig, *exp_reply;
+	const struct nf_nat_pptp_hook *hook;
 	enum ip_conntrack_dir dir;
 	int ret = 1;
-	typeof(nf_nat_pptp_hook_exp_gre) nf_nat_pptp_exp_gre;
 
 	exp_orig = nf_ct_expect_alloc(ct);
 	if (exp_orig == NULL)
@@ -239,9 +217,9 @@ static int exp_gre(struct nf_conn *ct, __be16 callid, __be16 peer_callid)
 			  IPPROTO_GRE, &callid, &peer_callid);
 	exp_reply->expectfn = pptp_expectfn;
 
-	nf_nat_pptp_exp_gre = rcu_dereference(nf_nat_pptp_hook_exp_gre);
-	if (nf_nat_pptp_exp_gre && ct->status & IPS_NAT_MASK)
-		nf_nat_pptp_exp_gre(exp_orig, exp_reply);
+	hook = rcu_dereference(nf_nat_pptp_hook);
+	if (hook && ct->status & IPS_NAT_MASK)
+		hook->exp_gre(exp_orig, exp_reply);
 	if (nf_ct_expect_related(exp_orig, 0) != 0)
 		goto out_put_both;
 	if (nf_ct_expect_related(exp_reply, 0) != 0)
@@ -279,9 +257,9 @@ pptp_inbound_pkt(struct sk_buff *skb, unsigned int protoff,
 		 enum ip_conntrack_info ctinfo)
 {
 	struct nf_ct_pptp_master *info = nfct_help_data(ct);
+	const struct nf_nat_pptp_hook *hook;
 	u_int16_t msg;
 	__be16 cid = 0, pcid = 0;
-	typeof(nf_nat_pptp_hook_inbound) nf_nat_pptp_inbound;
 
 	msg = ntohs(ctlh->messageType);
 	pr_debug("inbound control message %s\n", pptp_msg_name(msg));
@@ -383,10 +361,9 @@ pptp_inbound_pkt(struct sk_buff *skb, unsigned int protoff,
 		goto invalid;
 	}
 
-	nf_nat_pptp_inbound = rcu_dereference(nf_nat_pptp_hook_inbound);
-	if (nf_nat_pptp_inbound && ct->status & IPS_NAT_MASK)
-		return nf_nat_pptp_inbound(skb, ct, ctinfo,
-					   protoff, ctlh, pptpReq);
+	hook = rcu_dereference(nf_nat_pptp_hook);
+	if (hook && ct->status & IPS_NAT_MASK)
+		return hook->inbound(skb, ct, ctinfo, protoff, ctlh, pptpReq);
 	return NF_ACCEPT;
 
 invalid:
@@ -407,9 +384,9 @@ pptp_outbound_pkt(struct sk_buff *skb, unsigned int protoff,
 		  enum ip_conntrack_info ctinfo)
 {
 	struct nf_ct_pptp_master *info = nfct_help_data(ct);
+	const struct nf_nat_pptp_hook *hook;
 	u_int16_t msg;
 	__be16 cid = 0, pcid = 0;
-	typeof(nf_nat_pptp_hook_outbound) nf_nat_pptp_outbound;
 
 	msg = ntohs(ctlh->messageType);
 	pr_debug("outbound control message %s\n", pptp_msg_name(msg));
@@ -479,10 +456,9 @@ pptp_outbound_pkt(struct sk_buff *skb, unsigned int protoff,
 		goto invalid;
 	}
 
-	nf_nat_pptp_outbound = rcu_dereference(nf_nat_pptp_hook_outbound);
-	if (nf_nat_pptp_outbound && ct->status & IPS_NAT_MASK)
-		return nf_nat_pptp_outbound(skb, ct, ctinfo,
-					    protoff, ctlh, pptpReq);
+	hook = rcu_dereference(nf_nat_pptp_hook);
+	if (hook && ct->status & IPS_NAT_MASK)
+		return hook->outbound(skb, ct, ctinfo, protoff, ctlh, pptpReq);
 	return NF_ACCEPT;
 
 invalid:
diff --git a/net/netfilter/nf_conntrack_seqadj.c b/net/netfilter/nf_conntrack_seqadj.c
index 3066449f8bd8..7ab2b25b57bc 100644
--- a/net/netfilter/nf_conntrack_seqadj.c
+++ b/net/netfilter/nf_conntrack_seqadj.c
@@ -232,19 +232,3 @@ s32 nf_ct_seq_offset(const struct nf_conn *ct,
 		 this_way->offset_after : this_way->offset_before;
 }
 EXPORT_SYMBOL_GPL(nf_ct_seq_offset);
-
-static const struct nf_ct_ext_type nf_ct_seqadj_extend = {
-	.len	= sizeof(struct nf_conn_seqadj),
-	.align	= __alignof__(struct nf_conn_seqadj),
-	.id	= NF_CT_EXT_SEQADJ,
-};
-
-int nf_conntrack_seqadj_init(void)
-{
-	return nf_ct_extend_register(&nf_ct_seqadj_extend);
-}
-
-void nf_conntrack_seqadj_fini(void)
-{
-	nf_ct_extend_unregister(&nf_ct_seqadj_extend);
-}
diff --git a/net/netfilter/nf_conntrack_timeout.c b/net/netfilter/nf_conntrack_timeout.c
index 14387e0b8008..cec166ecba77 100644
--- a/net/netfilter/nf_conntrack_timeout.c
+++ b/net/netfilter/nf_conntrack_timeout.c
@@ -22,12 +22,8 @@
 #include <net/netfilter/nf_conntrack_l4proto.h>
 #include <net/netfilter/nf_conntrack_timeout.h>
 
-struct nf_ct_timeout *
-(*nf_ct_timeout_find_get_hook)(struct net *net, const char *name) __read_mostly;
-EXPORT_SYMBOL_GPL(nf_ct_timeout_find_get_hook);
-
-void (*nf_ct_timeout_put_hook)(struct nf_ct_timeout *timeout) __read_mostly;
-EXPORT_SYMBOL_GPL(nf_ct_timeout_put_hook);
+const struct nf_ct_timeout_hooks *nf_ct_timeout_hook __read_mostly;
+EXPORT_SYMBOL_GPL(nf_ct_timeout_hook);
 
 static int untimeout(struct nf_conn *ct, void *timeout)
 {
@@ -48,31 +44,30 @@ EXPORT_SYMBOL_GPL(nf_ct_untimeout);
 
 static void __nf_ct_timeout_put(struct nf_ct_timeout *timeout)
 {
-	typeof(nf_ct_timeout_put_hook) timeout_put;
+	const struct nf_ct_timeout_hooks *h = rcu_dereference(nf_ct_timeout_hook);
 
-	timeout_put = rcu_dereference(nf_ct_timeout_put_hook);
-	if (timeout_put)
-		timeout_put(timeout);
+	if (h)
+		h->timeout_put(timeout);
 }
 
 int nf_ct_set_timeout(struct net *net, struct nf_conn *ct,
 		      u8 l3num, u8 l4num, const char *timeout_name)
 {
-	typeof(nf_ct_timeout_find_get_hook) timeout_find_get;
+	const struct nf_ct_timeout_hooks *h;
 	struct nf_ct_timeout *timeout;
 	struct nf_conn_timeout *timeout_ext;
 	const char *errmsg = NULL;
 	int ret = 0;
 
 	rcu_read_lock();
-	timeout_find_get = rcu_dereference(nf_ct_timeout_find_get_hook);
-	if (!timeout_find_get) {
+	h = rcu_dereference(nf_ct_timeout_hook);
+	if (!h) {
 		ret = -ENOENT;
 		errmsg = "Timeout policy base is empty";
 		goto out;
 	}
 
-	timeout = timeout_find_get(net, timeout_name);
+	timeout = h->timeout_find_get(net, timeout_name);
 	if (!timeout) {
 		ret = -ENOENT;
 		pr_info_ratelimited("No such timeout policy \"%s\"\n",
@@ -119,37 +114,18 @@ EXPORT_SYMBOL_GPL(nf_ct_set_timeout);
 void nf_ct_destroy_timeout(struct nf_conn *ct)
 {
 	struct nf_conn_timeout *timeout_ext;
-	typeof(nf_ct_timeout_put_hook) timeout_put;
+	const struct nf_ct_timeout_hooks *h;
 
 	rcu_read_lock();
-	timeout_put = rcu_dereference(nf_ct_timeout_put_hook);
+	h = rcu_dereference(nf_ct_timeout_hook);
 
-	if (timeout_put) {
+	if (h) {
 		timeout_ext = nf_ct_timeout_find(ct);
 		if (timeout_ext) {
-			timeout_put(timeout_ext->timeout);
+			h->timeout_put(timeout_ext->timeout);
 			RCU_INIT_POINTER(timeout_ext->timeout, NULL);
 		}
 	}
 	rcu_read_unlock();
 }
 EXPORT_SYMBOL_GPL(nf_ct_destroy_timeout);
-
-static const struct nf_ct_ext_type timeout_extend = {
-	.len	= sizeof(struct nf_conn_timeout),
-	.align	= __alignof__(struct nf_conn_timeout),
-	.id	= NF_CT_EXT_TIMEOUT,
-};
-
-int nf_conntrack_timeout_init(void)
-{
-	int ret = nf_ct_extend_register(&timeout_extend);
-	if (ret < 0)
-		pr_err("nf_ct_timeout: Unable to register timeout extension.\n");
-	return ret;
-}
-
-void nf_conntrack_timeout_fini(void)
-{
-	nf_ct_extend_unregister(&timeout_extend);
-}
diff --git a/net/netfilter/nf_conntrack_timestamp.c b/net/netfilter/nf_conntrack_timestamp.c
index f656d393fa92..9e43a0a59e73 100644
--- a/net/netfilter/nf_conntrack_timestamp.c
+++ b/net/netfilter/nf_conntrack_timestamp.c
@@ -19,27 +19,7 @@ static bool nf_ct_tstamp __read_mostly;
 module_param_named(tstamp, nf_ct_tstamp, bool, 0644);
 MODULE_PARM_DESC(tstamp, "Enable connection tracking flow timestamping.");
 
-static const struct nf_ct_ext_type tstamp_extend = {
-	.len	= sizeof(struct nf_conn_tstamp),
-	.align	= __alignof__(struct nf_conn_tstamp),
-	.id	= NF_CT_EXT_TSTAMP,
-};
-
 void nf_conntrack_tstamp_pernet_init(struct net *net)
 {
 	net->ct.sysctl_tstamp = nf_ct_tstamp;
 }
-
-int nf_conntrack_tstamp_init(void)
-{
-	int ret;
-	ret = nf_ct_extend_register(&tstamp_extend);
-	if (ret < 0)
-		pr_err("Unable to register extension\n");
-	return ret;
-}
-
-void nf_conntrack_tstamp_fini(void)
-{
-	nf_ct_extend_unregister(&tstamp_extend);
-}
diff --git a/net/netfilter/nf_dup_netdev.c b/net/netfilter/nf_dup_netdev.c
index a579e59ee5c5..7873bd1389c3 100644
--- a/net/netfilter/nf_dup_netdev.c
+++ b/net/netfilter/nf_dup_netdev.c
@@ -19,7 +19,7 @@ static void nf_do_netdev_egress(struct sk_buff *skb, struct net_device *dev)
 		skb_push(skb, skb->mac_len);
 
 	skb->dev = dev;
-	skb->tstamp = 0;
+	skb_clear_tstamp(skb);
 	dev_queue_xmit(skb);
 }
 
diff --git a/net/netfilter/nf_flow_table_core.c b/net/netfilter/nf_flow_table_core.c
index b90eca7a2f22..3db256da919b 100644
--- a/net/netfilter/nf_flow_table_core.c
+++ b/net/netfilter/nf_flow_table_core.c
@@ -39,8 +39,14 @@ flow_offload_fill_dir(struct flow_offload *flow,
 
 	ft->l3proto = ctt->src.l3num;
 	ft->l4proto = ctt->dst.protonum;
-	ft->src_port = ctt->src.u.tcp.port;
-	ft->dst_port = ctt->dst.u.tcp.port;
+
+	switch (ctt->dst.protonum) {
+	case IPPROTO_TCP:
+	case IPPROTO_UDP:
+		ft->src_port = ctt->src.u.tcp.port;
+		ft->dst_port = ctt->dst.u.tcp.port;
+		break;
+	}
 }
 
 struct flow_offload *flow_offload_alloc(struct nf_conn *ct)
@@ -399,7 +405,8 @@ EXPORT_SYMBOL_GPL(flow_offload_lookup);
 
 static int
 nf_flow_table_iterate(struct nf_flowtable *flow_table,
-		      void (*iter)(struct flow_offload *flow, void *data),
+		      void (*iter)(struct nf_flowtable *flowtable,
+				   struct flow_offload *flow, void *data),
 		      void *data)
 {
 	struct flow_offload_tuple_rhash *tuplehash;
@@ -423,7 +430,7 @@ nf_flow_table_iterate(struct nf_flowtable *flow_table,
 
 		flow = container_of(tuplehash, struct flow_offload, tuplehash[0]);
 
-		iter(flow, data);
+		iter(flow_table, flow, data);
 	}
 	rhashtable_walk_stop(&hti);
 	rhashtable_walk_exit(&hti);
@@ -451,10 +458,9 @@ static bool nf_flow_has_stale_dst(struct flow_offload *flow)
 	       flow_offload_stale_dst(&flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple);
 }
 
-static void nf_flow_offload_gc_step(struct flow_offload *flow, void *data)
+static void nf_flow_offload_gc_step(struct nf_flowtable *flow_table,
+				    struct flow_offload *flow, void *data)
 {
-	struct nf_flowtable *flow_table = data;
-
 	if (nf_flow_has_expired(flow) ||
 	    nf_ct_is_dying(flow->ct) ||
 	    nf_flow_has_stale_dst(flow))
@@ -479,7 +485,7 @@ static void nf_flow_offload_work_gc(struct work_struct *work)
 	struct nf_flowtable *flow_table;
 
 	flow_table = container_of(work, struct nf_flowtable, gc_work.work);
-	nf_flow_table_iterate(flow_table, nf_flow_offload_gc_step, flow_table);
+	nf_flow_table_iterate(flow_table, nf_flow_offload_gc_step, NULL);
 	queue_delayed_work(system_power_efficient_wq, &flow_table->gc_work, HZ);
 }
 
@@ -595,7 +601,8 @@ int nf_flow_table_init(struct nf_flowtable *flowtable)
 }
 EXPORT_SYMBOL_GPL(nf_flow_table_init);
 
-static void nf_flow_table_do_cleanup(struct flow_offload *flow, void *data)
+static void nf_flow_table_do_cleanup(struct nf_flowtable *flow_table,
+				     struct flow_offload *flow, void *data)
 {
 	struct net_device *dev = data;
 
@@ -637,11 +644,10 @@ void nf_flow_table_free(struct nf_flowtable *flow_table)
 
 	cancel_delayed_work_sync(&flow_table->gc_work);
 	nf_flow_table_iterate(flow_table, nf_flow_table_do_cleanup, NULL);
-	nf_flow_table_iterate(flow_table, nf_flow_offload_gc_step, flow_table);
+	nf_flow_table_iterate(flow_table, nf_flow_offload_gc_step, NULL);
 	nf_flow_table_offload_flush(flow_table);
 	if (nf_flowtable_hw_offload(flow_table))
-		nf_flow_table_iterate(flow_table, nf_flow_offload_gc_step,
-				      flow_table);
+		nf_flow_table_iterate(flow_table, nf_flow_offload_gc_step, NULL);
 	rhashtable_destroy(&flow_table->rhashtable);
 }
 EXPORT_SYMBOL_GPL(nf_flow_table_free);
diff --git a/net/netfilter/nf_flow_table_inet.c b/net/netfilter/nf_flow_table_inet.c
index 5c57ade6bd05..0ccabf3fa6aa 100644
--- a/net/netfilter/nf_flow_table_inet.c
+++ b/net/netfilter/nf_flow_table_inet.c
@@ -6,12 +6,29 @@
 #include <linux/rhashtable.h>
 #include <net/netfilter/nf_flow_table.h>
 #include <net/netfilter/nf_tables.h>
+#include <linux/if_vlan.h>
 
 static unsigned int
 nf_flow_offload_inet_hook(void *priv, struct sk_buff *skb,
 			  const struct nf_hook_state *state)
 {
+	struct vlan_ethhdr *veth;
+	__be16 proto;
+
 	switch (skb->protocol) {
+	case htons(ETH_P_8021Q):
+		veth = (struct vlan_ethhdr *)skb_mac_header(skb);
+		proto = veth->h_vlan_encapsulated_proto;
+		break;
+	case htons(ETH_P_PPP_SES):
+		proto = nf_flow_pppoe_proto(skb);
+		break;
+	default:
+		proto = skb->protocol;
+		break;
+	}
+
+	switch (proto) {
 	case htons(ETH_P_IP):
 		return nf_flow_offload_ip_hook(priv, skb, state);
 	case htons(ETH_P_IPV6):
diff --git a/net/netfilter/nf_flow_table_ip.c b/net/netfilter/nf_flow_table_ip.c
index 889cf88d3dba..32c0eb1b4821 100644
--- a/net/netfilter/nf_flow_table_ip.c
+++ b/net/netfilter/nf_flow_table_ip.c
@@ -8,8 +8,6 @@
 #include <linux/ipv6.h>
 #include <linux/netdevice.h>
 #include <linux/if_ether.h>
-#include <linux/if_pppox.h>
-#include <linux/ppp_defs.h>
 #include <net/ip.h>
 #include <net/ipv6.h>
 #include <net/ip6_route.h>
@@ -172,6 +170,7 @@ static int nf_flow_tuple_ip(struct sk_buff *skb, const struct net_device *dev,
 	struct flow_ports *ports;
 	unsigned int thoff;
 	struct iphdr *iph;
+	u8 ipproto;
 
 	if (!pskb_may_pull(skb, sizeof(*iph) + offset))
 		return -1;
@@ -185,13 +184,19 @@ static int nf_flow_tuple_ip(struct sk_buff *skb, const struct net_device *dev,
 
 	thoff += offset;
 
-	switch (iph->protocol) {
+	ipproto = iph->protocol;
+	switch (ipproto) {
 	case IPPROTO_TCP:
 		*hdrsize = sizeof(struct tcphdr);
 		break;
 	case IPPROTO_UDP:
 		*hdrsize = sizeof(struct udphdr);
 		break;
+#ifdef CONFIG_NF_CT_PROTO_GRE
+	case IPPROTO_GRE:
+		*hdrsize = sizeof(struct gre_base_hdr);
+		break;
+#endif
 	default:
 		return -1;
 	}
@@ -202,15 +207,29 @@ static int nf_flow_tuple_ip(struct sk_buff *skb, const struct net_device *dev,
 	if (!pskb_may_pull(skb, thoff + *hdrsize))
 		return -1;
 
+	switch (ipproto) {
+	case IPPROTO_TCP:
+	case IPPROTO_UDP:
+		ports = (struct flow_ports *)(skb_network_header(skb) + thoff);
+		tuple->src_port		= ports->source;
+		tuple->dst_port		= ports->dest;
+		break;
+	case IPPROTO_GRE: {
+		struct gre_base_hdr *greh;
+
+		greh = (struct gre_base_hdr *)(skb_network_header(skb) + thoff);
+		if ((greh->flags & GRE_VERSION) != GRE_VERSION_0)
+			return -1;
+		break;
+	}
+	}
+
 	iph = (struct iphdr *)(skb_network_header(skb) + offset);
-	ports = (struct flow_ports *)(skb_network_header(skb) + thoff);
 
 	tuple->src_v4.s_addr	= iph->saddr;
 	tuple->dst_v4.s_addr	= iph->daddr;
-	tuple->src_port		= ports->source;
-	tuple->dst_port		= ports->dest;
 	tuple->l3proto		= AF_INET;
-	tuple->l4proto		= iph->protocol;
+	tuple->l4proto		= ipproto;
 	tuple->iifidx		= dev->ifindex;
 	nf_flow_tuple_encap(skb, tuple);
 
@@ -239,22 +258,6 @@ static unsigned int nf_flow_xmit_xfrm(struct sk_buff *skb,
 	return NF_STOLEN;
 }
 
-static inline __be16 nf_flow_pppoe_proto(const struct sk_buff *skb)
-{
-	__be16 proto;
-
-	proto = *((__be16 *)(skb_mac_header(skb) + ETH_HLEN +
-			     sizeof(struct pppoe_hdr)));
-	switch (proto) {
-	case htons(PPP_IP):
-		return htons(ETH_P_IP);
-	case htons(PPP_IPV6):
-		return htons(ETH_P_IPV6);
-	}
-
-	return 0;
-}
-
 static bool nf_flow_skb_encap_protocol(const struct sk_buff *skb, __be16 proto,
 				       u32 *offset)
 {
@@ -376,7 +379,7 @@ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb,
 	nf_flow_nat_ip(flow, skb, thoff, dir, iph);
 
 	ip_decrease_ttl(iph);
-	skb->tstamp = 0;
+	skb_clear_tstamp(skb);
 
 	if (flow_table->flags & NF_FLOWTABLE_COUNTER)
 		nf_ct_acct_update(flow->ct, tuplehash->tuple.dir, skb->len);
@@ -521,6 +524,7 @@ static int nf_flow_tuple_ipv6(struct sk_buff *skb, const struct net_device *dev,
 	struct flow_ports *ports;
 	struct ipv6hdr *ip6h;
 	unsigned int thoff;
+	u8 nexthdr;
 
 	thoff = sizeof(*ip6h) + offset;
 	if (!pskb_may_pull(skb, thoff))
@@ -528,13 +532,19 @@ static int nf_flow_tuple_ipv6(struct sk_buff *skb, const struct net_device *dev,
 
 	ip6h = (struct ipv6hdr *)(skb_network_header(skb) + offset);
 
-	switch (ip6h->nexthdr) {
+	nexthdr = ip6h->nexthdr;
+	switch (nexthdr) {
 	case IPPROTO_TCP:
 		*hdrsize = sizeof(struct tcphdr);
 		break;
 	case IPPROTO_UDP:
 		*hdrsize = sizeof(struct udphdr);
 		break;
+#ifdef CONFIG_NF_CT_PROTO_GRE
+	case IPPROTO_GRE:
+		*hdrsize = sizeof(struct gre_base_hdr);
+		break;
+#endif
 	default:
 		return -1;
 	}
@@ -545,15 +555,29 @@ static int nf_flow_tuple_ipv6(struct sk_buff *skb, const struct net_device *dev,
 	if (!pskb_may_pull(skb, thoff + *hdrsize))
 		return -1;
 
+	switch (nexthdr) {
+	case IPPROTO_TCP:
+	case IPPROTO_UDP:
+		ports = (struct flow_ports *)(skb_network_header(skb) + thoff);
+		tuple->src_port		= ports->source;
+		tuple->dst_port		= ports->dest;
+		break;
+	case IPPROTO_GRE: {
+		struct gre_base_hdr *greh;
+
+		greh = (struct gre_base_hdr *)(skb_network_header(skb) + thoff);
+		if ((greh->flags & GRE_VERSION) != GRE_VERSION_0)
+			return -1;
+		break;
+	}
+	}
+
 	ip6h = (struct ipv6hdr *)(skb_network_header(skb) + offset);
-	ports = (struct flow_ports *)(skb_network_header(skb) + thoff);
 
 	tuple->src_v6		= ip6h->saddr;
 	tuple->dst_v6		= ip6h->daddr;
-	tuple->src_port		= ports->source;
-	tuple->dst_port		= ports->dest;
 	tuple->l3proto		= AF_INET6;
-	tuple->l4proto		= ip6h->nexthdr;
+	tuple->l4proto		= nexthdr;
 	tuple->iifidx		= dev->ifindex;
 	nf_flow_tuple_encap(skb, tuple);
 
@@ -611,7 +635,7 @@ nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb,
 	nf_flow_nat_ipv6(flow, skb, dir, ip6h);
 
 	ip6h->hop_limit--;
-	skb->tstamp = 0;
+	skb_clear_tstamp(skb);
 
 	if (flow_table->flags & NF_FLOWTABLE_COUNTER)
 		nf_ct_acct_update(flow->ct, tuplehash->tuple.dir, skb->len);
diff --git a/net/netfilter/nf_flow_table_offload.c b/net/netfilter/nf_flow_table_offload.c
index fc4265acd9c4..11b6e1942092 100644
--- a/net/netfilter/nf_flow_table_offload.c
+++ b/net/netfilter/nf_flow_table_offload.c
@@ -20,7 +20,6 @@ static struct workqueue_struct *nf_flow_offload_stats_wq;
 struct flow_offload_work {
 	struct list_head	list;
 	enum flow_cls_command	cmd;
-	int			priority;
 	struct nf_flowtable	*flowtable;
 	struct flow_offload	*flow;
 	struct work_struct	work;
@@ -174,6 +173,7 @@ static int nf_flow_rule_match(struct nf_flow_match *match,
 		match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_TCP);
 		break;
 	case IPPROTO_UDP:
+	case IPPROTO_GRE:
 		break;
 	default:
 		return -EOPNOTSUPP;
@@ -182,15 +182,22 @@ static int nf_flow_rule_match(struct nf_flow_match *match,
 	key->basic.ip_proto = tuple->l4proto;
 	mask->basic.ip_proto = 0xff;
 
-	key->tp.src = tuple->src_port;
-	mask->tp.src = 0xffff;
-	key->tp.dst = tuple->dst_port;
-	mask->tp.dst = 0xffff;
-
 	match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_META) |
 				      BIT(FLOW_DISSECTOR_KEY_CONTROL) |
-				      BIT(FLOW_DISSECTOR_KEY_BASIC) |
-				      BIT(FLOW_DISSECTOR_KEY_PORTS);
+				      BIT(FLOW_DISSECTOR_KEY_BASIC);
+
+	switch (tuple->l4proto) {
+	case IPPROTO_TCP:
+	case IPPROTO_UDP:
+		key->tp.src = tuple->src_port;
+		mask->tp.src = 0xffff;
+		key->tp.dst = tuple->dst_port;
+		mask->tp.dst = 0xffff;
+
+		match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_PORTS);
+		break;
+	}
+
 	return 0;
 }
 
@@ -866,7 +873,8 @@ static int flow_offload_tuple_add(struct flow_offload_work *offload,
 				  enum flow_offload_tuple_dir dir)
 {
 	return nf_flow_offload_tuple(offload->flowtable, offload->flow,
-				     flow_rule, dir, offload->priority,
+				     flow_rule, dir,
+				     offload->flowtable->priority,
 				     FLOW_CLS_REPLACE, NULL,
 				     &offload->flowtable->flow_block.cb_list);
 }
@@ -875,7 +883,8 @@ static void flow_offload_tuple_del(struct flow_offload_work *offload,
 				   enum flow_offload_tuple_dir dir)
 {
 	nf_flow_offload_tuple(offload->flowtable, offload->flow, NULL, dir,
-			      offload->priority, FLOW_CLS_DESTROY, NULL,
+			      offload->flowtable->priority,
+			      FLOW_CLS_DESTROY, NULL,
 			      &offload->flowtable->flow_block.cb_list);
 }
 
@@ -926,7 +935,8 @@ static void flow_offload_tuple_stats(struct flow_offload_work *offload,
 				     struct flow_stats *stats)
 {
 	nf_flow_offload_tuple(offload->flowtable, offload->flow, NULL, dir,
-			      offload->priority, FLOW_CLS_STATS, stats,
+			      offload->flowtable->priority,
+			      FLOW_CLS_STATS, stats,
 			      &offload->flowtable->flow_block.cb_list);
 }
 
@@ -1004,7 +1014,6 @@ nf_flow_offload_work_alloc(struct nf_flowtable *flowtable,
 
 	offload->cmd = cmd;
 	offload->flow = flow;
-	offload->priority = flowtable->priority;
 	offload->flowtable = flowtable;
 	INIT_WORK(&offload->work, flow_offload_work_handler);
 
diff --git a/net/netfilter/nf_nat_core.c b/net/netfilter/nf_nat_core.c
index ffcf6529afc3..7981be526f26 100644
--- a/net/netfilter/nf_nat_core.c
+++ b/net/netfilter/nf_nat_core.c
@@ -801,7 +801,7 @@ static int nf_nat_proto_remove(struct nf_conn *i, void *data)
 	return i->status & IPS_NAT_MASK ? 1 : 0;
 }
 
-static void __nf_nat_cleanup_conntrack(struct nf_conn *ct)
+static void nf_nat_cleanup_conntrack(struct nf_conn *ct)
 {
 	unsigned int h;
 
@@ -823,7 +823,7 @@ static int nf_nat_proto_clean(struct nf_conn *ct, void *data)
 	 * will delete entry from already-freed table.
 	 */
 	if (test_and_clear_bit(IPS_SRC_NAT_DONE_BIT, &ct->status))
-		__nf_nat_cleanup_conntrack(ct);
+		nf_nat_cleanup_conntrack(ct);
 
 	/* don't delete conntrack.  Although that would make things a lot
 	 * simpler, we'd end up flushing all conntracks on nat rmmod.
@@ -831,20 +831,6 @@ static int nf_nat_proto_clean(struct nf_conn *ct, void *data)
 	return 0;
 }
 
-/* No one using conntrack by the time this called. */
-static void nf_nat_cleanup_conntrack(struct nf_conn *ct)
-{
-	if (ct->status & IPS_SRC_NAT_DONE)
-		__nf_nat_cleanup_conntrack(ct);
-}
-
-static struct nf_ct_ext_type nat_extend __read_mostly = {
-	.len		= sizeof(struct nf_conn_nat),
-	.align		= __alignof__(struct nf_conn_nat),
-	.destroy	= nf_nat_cleanup_conntrack,
-	.id		= NF_CT_EXT_NAT,
-};
-
 #if IS_ENABLED(CONFIG_NF_CT_NETLINK)
 
 #include <linux/netfilter/nfnetlink.h>
@@ -1136,6 +1122,7 @@ static const struct nf_nat_hook nat_hook = {
 	.decode_session		= __nf_nat_decode_session,
 #endif
 	.manip_pkt		= nf_nat_manip_pkt,
+	.remove_nat_bysrc	= nf_nat_cleanup_conntrack,
 };
 
 static int __init nf_nat_init(void)
@@ -1151,19 +1138,11 @@ static int __init nf_nat_init(void)
 	if (!nf_nat_bysource)
 		return -ENOMEM;
 
-	ret = nf_ct_extend_register(&nat_extend);
-	if (ret < 0) {
-		kvfree(nf_nat_bysource);
-		pr_err("Unable to register extension\n");
-		return ret;
-	}
-
 	for (i = 0; i < CONNTRACK_LOCKS; i++)
 		spin_lock_init(&nf_nat_locks[i]);
 
 	ret = register_pernet_subsys(&nat_net_ops);
 	if (ret < 0) {
-		nf_ct_extend_unregister(&nat_extend);
 		kvfree(nf_nat_bysource);
 		return ret;
 	}
@@ -1182,7 +1161,6 @@ static void __exit nf_nat_cleanup(void)
 
 	nf_ct_iterate_destroy(nf_nat_proto_clean, &clean);
 
-	nf_ct_extend_unregister(&nat_extend);
 	nf_ct_helper_expectfn_unregister(&follow_master_nat);
 	RCU_INIT_POINTER(nf_nat_hook, NULL);
 
diff --git a/net/netfilter/nf_synproxy_core.c b/net/netfilter/nf_synproxy_core.c
index 2dfc5dae0656..e479dd0561c5 100644
--- a/net/netfilter/nf_synproxy_core.c
+++ b/net/netfilter/nf_synproxy_core.c
@@ -236,12 +236,6 @@ synproxy_tstamp_adjust(struct sk_buff *skb, unsigned int protoff,
 	return 1;
 }
 
-static struct nf_ct_ext_type nf_ct_synproxy_extend __read_mostly = {
-	.len		= sizeof(struct nf_conn_synproxy),
-	.align		= __alignof__(struct nf_conn_synproxy),
-	.id		= NF_CT_EXT_SYNPROXY,
-};
-
 #ifdef CONFIG_PROC_FS
 static void *synproxy_cpu_seq_start(struct seq_file *seq, loff_t *pos)
 {
@@ -387,28 +381,12 @@ static struct pernet_operations synproxy_net_ops = {
 
 static int __init synproxy_core_init(void)
 {
-	int err;
-
-	err = nf_ct_extend_register(&nf_ct_synproxy_extend);
-	if (err < 0)
-		goto err1;
-
-	err = register_pernet_subsys(&synproxy_net_ops);
-	if (err < 0)
-		goto err2;
-
-	return 0;
-
-err2:
-	nf_ct_extend_unregister(&nf_ct_synproxy_extend);
-err1:
-	return err;
+	return register_pernet_subsys(&synproxy_net_ops);
 }
 
 static void __exit synproxy_core_exit(void)
 {
 	unregister_pernet_subsys(&synproxy_net_ops);
-	nf_ct_extend_unregister(&nf_ct_synproxy_extend);
 }
 
 module_init(synproxy_core_init);
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index d71a33ae39b3..c55ccd3cf2f8 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -550,6 +550,58 @@ static int nft_delflowtable(struct nft_ctx *ctx,
 	return err;
 }
 
+static void __nft_reg_track_clobber(struct nft_regs_track *track, u8 dreg)
+{
+	int i;
+
+	for (i = track->regs[dreg].num_reg; i > 0; i--)
+		__nft_reg_track_cancel(track, dreg - i);
+}
+
+static void __nft_reg_track_update(struct nft_regs_track *track,
+				   const struct nft_expr *expr,
+				   u8 dreg, u8 num_reg)
+{
+	track->regs[dreg].selector = expr;
+	track->regs[dreg].bitwise = NULL;
+	track->regs[dreg].num_reg = num_reg;
+}
+
+void nft_reg_track_update(struct nft_regs_track *track,
+			  const struct nft_expr *expr, u8 dreg, u8 len)
+{
+	unsigned int regcount;
+	int i;
+
+	__nft_reg_track_clobber(track, dreg);
+
+	regcount = DIV_ROUND_UP(len, NFT_REG32_SIZE);
+	for (i = 0; i < regcount; i++, dreg++)
+		__nft_reg_track_update(track, expr, dreg, i);
+}
+EXPORT_SYMBOL_GPL(nft_reg_track_update);
+
+void nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg, u8 len)
+{
+	unsigned int regcount;
+	int i;
+
+	__nft_reg_track_clobber(track, dreg);
+
+	regcount = DIV_ROUND_UP(len, NFT_REG32_SIZE);
+	for (i = 0; i < regcount; i++, dreg++)
+		__nft_reg_track_cancel(track, dreg);
+}
+EXPORT_SYMBOL_GPL(nft_reg_track_cancel);
+
+void __nft_reg_track_cancel(struct nft_regs_track *track, u8 dreg)
+{
+	track->regs[dreg].selector = NULL;
+	track->regs[dreg].bitwise = NULL;
+	track->regs[dreg].num_reg = 0;
+}
+EXPORT_SYMBOL_GPL(__nft_reg_track_cancel);
+
 /*
  * Tables
  */
@@ -1072,6 +1124,30 @@ static int nft_objname_hash_cmp(struct rhashtable_compare_arg *arg,
 	return strcmp(obj->key.name, k->name);
 }
 
+static bool nft_supported_family(u8 family)
+{
+	return false
+#ifdef CONFIG_NF_TABLES_INET
+		|| family == NFPROTO_INET
+#endif
+#ifdef CONFIG_NF_TABLES_IPV4
+		|| family == NFPROTO_IPV4
+#endif
+#ifdef CONFIG_NF_TABLES_ARP
+		|| family == NFPROTO_ARP
+#endif
+#ifdef CONFIG_NF_TABLES_NETDEV
+		|| family == NFPROTO_NETDEV
+#endif
+#if IS_ENABLED(CONFIG_NF_TABLES_BRIDGE)
+		|| family == NFPROTO_BRIDGE
+#endif
+#ifdef CONFIG_NF_TABLES_IPV6
+		|| family == NFPROTO_IPV6
+#endif
+		;
+}
+
 static int nf_tables_newtable(struct sk_buff *skb, const struct nfnl_info *info,
 			      const struct nlattr * const nla[])
 {
@@ -1086,6 +1162,9 @@ static int nf_tables_newtable(struct sk_buff *skb, const struct nfnl_info *info,
 	u32 flags = 0;
 	int err;
 
+	if (!nft_supported_family(family))
+		return -EOPNOTSUPP;
+
 	lockdep_assert_held(&nft_net->commit_mutex);
 	attr = nla[NFTA_TABLE_NAME];
 	table = nft_table_lookup(net, attr, family, genmask,
@@ -8263,7 +8342,16 @@ EXPORT_SYMBOL_GPL(nf_tables_trans_destroy_flush_work);
 static bool nft_expr_reduce(struct nft_regs_track *track,
 			    const struct nft_expr *expr)
 {
-	return false;
+	if (!expr->ops->reduce) {
+		pr_warn_once("missing reduce for expression %s ",
+			     expr->ops->type->name);
+		return false;
+	}
+
+	if (nft_reduce_is_readonly(expr))
+		return false;
+
+	return expr->ops->reduce(track, expr);
 }
 
 static int nf_tables_commit_chain_prepare(struct net *net, struct nft_chain *chain)
@@ -9275,17 +9363,23 @@ int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest)
 }
 EXPORT_SYMBOL_GPL(nft_parse_u32_check);
 
-static unsigned int nft_parse_register(const struct nlattr *attr)
+static unsigned int nft_parse_register(const struct nlattr *attr, u32 *preg)
 {
 	unsigned int reg;
 
 	reg = ntohl(nla_get_be32(attr));
 	switch (reg) {
 	case NFT_REG_VERDICT...NFT_REG_4:
-		return reg * NFT_REG_SIZE / NFT_REG32_SIZE;
+		*preg = reg * NFT_REG_SIZE / NFT_REG32_SIZE;
+		break;
+	case NFT_REG32_00...NFT_REG32_15:
+		*preg = reg + NFT_REG_SIZE / NFT_REG32_SIZE - NFT_REG32_00;
+		break;
 	default:
-		return reg + NFT_REG_SIZE / NFT_REG32_SIZE - NFT_REG32_00;
+		return -ERANGE;
 	}
+
+	return 0;
 }
 
 /**
@@ -9327,7 +9421,10 @@ int nft_parse_register_load(const struct nlattr *attr, u8 *sreg, u32 len)
 	u32 reg;
 	int err;
 
-	reg = nft_parse_register(attr);
+	err = nft_parse_register(attr, &reg);
+	if (err < 0)
+		return err;
+
 	err = nft_validate_register_load(reg, len);
 	if (err < 0)
 		return err;
@@ -9382,7 +9479,10 @@ int nft_parse_register_store(const struct nft_ctx *ctx,
 	int err;
 	u32 reg;
 
-	reg = nft_parse_register(attr);
+	err = nft_parse_register(attr, &reg);
+	if (err < 0)
+		return err;
+
 	err = nft_validate_register_store(ctx, reg, data, type, len);
 	if (err < 0)
 		return err;
diff --git a/net/netfilter/nf_tables_core.c b/net/netfilter/nf_tables_core.c
index 36e73f9828c5..53f40e473855 100644
--- a/net/netfilter/nf_tables_core.c
+++ b/net/netfilter/nf_tables_core.c
@@ -67,6 +67,20 @@ static void nft_cmp_fast_eval(const struct nft_expr *expr,
 	regs->verdict.code = NFT_BREAK;
 }
 
+static void nft_cmp16_fast_eval(const struct nft_expr *expr,
+				struct nft_regs *regs)
+{
+	const struct nft_cmp16_fast_expr *priv = nft_expr_priv(expr);
+	const u64 *reg_data = (const u64 *)&regs->data[priv->sreg];
+	const u64 *mask = (const u64 *)&priv->mask;
+	const u64 *data = (const u64 *)&priv->data;
+
+	if (((reg_data[0] & mask[0]) == data[0] &&
+	    ((reg_data[1] & mask[1]) == data[1])) ^ priv->inv)
+		return;
+	regs->verdict.code = NFT_BREAK;
+}
+
 static noinline void __nft_trace_verdict(struct nft_traceinfo *info,
 					 const struct nft_chain *chain,
 					 const struct nft_regs *regs)
@@ -201,7 +215,7 @@ nft_do_chain(struct nft_pktinfo *pkt, void *priv)
 	const struct nft_rule_dp *rule, *last_rule;
 	const struct net *net = nft_net(pkt);
 	const struct nft_expr *expr, *last;
-	struct nft_regs regs;
+	struct nft_regs regs = {};
 	unsigned int stackptr = 0;
 	struct nft_jumpstack jumpstack[NFT_JUMP_STACK_SIZE];
 	bool genbit = READ_ONCE(net->nft.gencursor);
@@ -225,6 +239,8 @@ next_rule:
 		nft_rule_dp_for_each_expr(expr, last, rule) {
 			if (expr->ops == &nft_cmp_fast_ops)
 				nft_cmp_fast_eval(expr, &regs);
+			else if (expr->ops == &nft_cmp16_fast_ops)
+				nft_cmp16_fast_eval(expr, &regs);
 			else if (expr->ops == &nft_bitwise_fast_ops)
 				nft_bitwise_fast_eval(expr, &regs);
 			else if (expr->ops != &nft_payload_fast_ops ||
diff --git a/net/netfilter/nfnetlink_cttimeout.c b/net/netfilter/nfnetlink_cttimeout.c
index c57673d499be..b0d8888a539b 100644
--- a/net/netfilter/nfnetlink_cttimeout.c
+++ b/net/netfilter/nfnetlink_cttimeout.c
@@ -605,6 +605,11 @@ static struct pernet_operations cttimeout_ops = {
 	.size   = sizeof(struct nfct_timeout_pernet),
 };
 
+static const struct nf_ct_timeout_hooks hooks = {
+	.timeout_find_get = ctnl_timeout_find_get,
+	.timeout_put = ctnl_timeout_put,
+};
+
 static int __init cttimeout_init(void)
 {
 	int ret;
@@ -619,8 +624,7 @@ static int __init cttimeout_init(void)
 			"nfnetlink.\n");
 		goto err_out;
 	}
-	RCU_INIT_POINTER(nf_ct_timeout_find_get_hook, ctnl_timeout_find_get);
-	RCU_INIT_POINTER(nf_ct_timeout_put_hook, ctnl_timeout_put);
+	RCU_INIT_POINTER(nf_ct_timeout_hook, &hooks);
 	return 0;
 
 err_out:
@@ -633,8 +637,7 @@ static void __exit cttimeout_exit(void)
 	nfnetlink_subsys_unregister(&cttimeout_subsys);
 
 	unregister_pernet_subsys(&cttimeout_ops);
-	RCU_INIT_POINTER(nf_ct_timeout_find_get_hook, NULL);
-	RCU_INIT_POINTER(nf_ct_timeout_put_hook, NULL);
+	RCU_INIT_POINTER(nf_ct_timeout_hook, NULL);
 	synchronize_rcu();
 }
 
diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c
index ae9c0756bba5..d97eb280cb2e 100644
--- a/net/netfilter/nfnetlink_log.c
+++ b/net/netfilter/nfnetlink_log.c
@@ -460,6 +460,7 @@ __build_packet_message(struct nfnl_log_net *log,
 	sk_buff_data_t old_tail = inst->skb->tail;
 	struct sock *sk;
 	const unsigned char *hwhdrp;
+	ktime_t tstamp;
 
 	nlh = nfnl_msg_put(inst->skb, 0, 0,
 			   nfnl_msg_type(NFNL_SUBSYS_ULOG, NFULNL_MSG_PACKET),
@@ -588,9 +589,10 @@ __build_packet_message(struct nfnl_log_net *log,
 			goto nla_put_failure;
 	}
 
-	if (hooknum <= NF_INET_FORWARD && skb->tstamp) {
+	tstamp = skb_tstamp_cond(skb, false);
+	if (hooknum <= NF_INET_FORWARD && tstamp) {
 		struct nfulnl_msg_packet_timestamp ts;
-		struct timespec64 kts = ktime_to_timespec64(skb->tstamp);
+		struct timespec64 kts = ktime_to_timespec64(tstamp);
 		ts.sec = cpu_to_be64(kts.tv_sec);
 		ts.usec = cpu_to_be64(kts.tv_nsec / NSEC_PER_USEC);
 
diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
index 64a6acb6aeae..a364f8e5e698 100644
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -392,6 +392,7 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
 	bool csum_verify;
 	char *secdata = NULL;
 	u32 seclen = 0;
+	ktime_t tstamp;
 
 	size = nlmsg_total_size(sizeof(struct nfgenmsg))
 		+ nla_total_size(sizeof(struct nfqnl_msg_packet_hdr))
@@ -402,11 +403,13 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
 		+ nla_total_size(sizeof(u_int32_t))	/* ifindex */
 #endif
 		+ nla_total_size(sizeof(u_int32_t))	/* mark */
+		+ nla_total_size(sizeof(u_int32_t))	/* priority */
 		+ nla_total_size(sizeof(struct nfqnl_msg_packet_hw))
 		+ nla_total_size(sizeof(u_int32_t))	/* skbinfo */
 		+ nla_total_size(sizeof(u_int32_t));	/* cap_len */
 
-	if (entskb->tstamp)
+	tstamp = skb_tstamp_cond(entskb, false);
+	if (tstamp)
 		size += nla_total_size(sizeof(struct nfqnl_msg_packet_timestamp));
 
 	size += nfqnl_get_bridge_size(entry);
@@ -559,6 +562,10 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
 	    nla_put_be32(skb, NFQA_MARK, htonl(entskb->mark)))
 		goto nla_put_failure;
 
+	if (entskb->priority &&
+	    nla_put_be32(skb, NFQA_PRIORITY, htonl(entskb->priority)))
+		goto nla_put_failure;
+
 	if (indev && entskb->dev &&
 	    skb_mac_header_was_set(entskb) &&
 	    skb_mac_header_len(entskb) != 0) {
@@ -577,9 +584,9 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
 	if (nfqnl_put_bridge(entry, skb) < 0)
 		goto nla_put_failure;
 
-	if (entry->state.hook <= NF_INET_FORWARD && entskb->tstamp) {
+	if (entry->state.hook <= NF_INET_FORWARD && tstamp) {
 		struct nfqnl_msg_packet_timestamp ts;
-		struct timespec64 kts = ktime_to_timespec64(entskb->tstamp);
+		struct timespec64 kts = ktime_to_timespec64(tstamp);
 
 		ts.sec = cpu_to_be64(kts.tv_sec);
 		ts.usec = cpu_to_be64(kts.tv_nsec / NSEC_PER_USEC);
@@ -1020,11 +1027,13 @@ static const struct nla_policy nfqa_verdict_policy[NFQA_MAX+1] = {
 	[NFQA_CT]		= { .type = NLA_UNSPEC },
 	[NFQA_EXP]		= { .type = NLA_UNSPEC },
 	[NFQA_VLAN]		= { .type = NLA_NESTED },
+	[NFQA_PRIORITY]		= { .type = NLA_U32 },
 };
 
 static const struct nla_policy nfqa_verdict_batch_policy[NFQA_MAX+1] = {
 	[NFQA_VERDICT_HDR]	= { .len = sizeof(struct nfqnl_msg_verdict_hdr) },
 	[NFQA_MARK]		= { .type = NLA_U32 },
+	[NFQA_PRIORITY]		= { .type = NLA_U32 },
 };
 
 static struct nfqnl_instance *
@@ -1105,6 +1114,9 @@ static int nfqnl_recv_verdict_batch(struct sk_buff *skb,
 		if (nfqa[NFQA_MARK])
 			entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK]));
 
+		if (nfqa[NFQA_PRIORITY])
+			entry->skb->priority = ntohl(nla_get_be32(nfqa[NFQA_PRIORITY]));
+
 		nfqnl_reinject(entry, verdict);
 	}
 	return 0;
@@ -1231,6 +1243,9 @@ static int nfqnl_recv_verdict(struct sk_buff *skb, const struct nfnl_info *info,
 	if (nfqa[NFQA_MARK])
 		entry->skb->mark = ntohl(nla_get_be32(nfqa[NFQA_MARK]));
 
+	if (nfqa[NFQA_PRIORITY])
+		entry->skb->priority = ntohl(nla_get_be32(nfqa[NFQA_PRIORITY]));
+
 	nfqnl_reinject(entry, verdict);
 	return 0;
 }
diff --git a/net/netfilter/nft_bitwise.c b/net/netfilter/nft_bitwise.c
index 7b727d3ebf9d..38caa66632b4 100644
--- a/net/netfilter/nft_bitwise.c
+++ b/net/netfilter/nft_bitwise.c
@@ -283,12 +283,16 @@ static bool nft_bitwise_reduce(struct nft_regs_track *track,
 {
 	const struct nft_bitwise *priv = nft_expr_priv(expr);
 	const struct nft_bitwise *bitwise;
+	unsigned int regcount;
+	u8 dreg;
+	int i;
 
 	if (!track->regs[priv->sreg].selector)
 		return false;
 
 	bitwise = nft_expr_priv(expr);
 	if (track->regs[priv->sreg].selector == track->regs[priv->dreg].selector &&
+	    track->regs[priv->sreg].num_reg == 0 &&
 	    track->regs[priv->dreg].bitwise &&
 	    track->regs[priv->dreg].bitwise->ops == expr->ops &&
 	    priv->sreg == bitwise->sreg &&
@@ -302,17 +306,21 @@ static bool nft_bitwise_reduce(struct nft_regs_track *track,
 		return true;
 	}
 
-	if (track->regs[priv->sreg].bitwise) {
-		track->regs[priv->dreg].selector = NULL;
-		track->regs[priv->dreg].bitwise = NULL;
+	if (track->regs[priv->sreg].bitwise ||
+	    track->regs[priv->sreg].num_reg != 0) {
+		nft_reg_track_cancel(track, priv->dreg, priv->len);
 		return false;
 	}
 
 	if (priv->sreg != priv->dreg) {
-		track->regs[priv->dreg].selector =
-			track->regs[priv->sreg].selector;
+		nft_reg_track_update(track, track->regs[priv->sreg].selector,
+				     priv->dreg, priv->len);
 	}
-	track->regs[priv->dreg].bitwise = expr;
+
+	dreg = priv->dreg;
+	regcount = DIV_ROUND_UP(priv->len, NFT_REG32_SIZE);
+	for (i = 0; i < regcount; i++, dreg++)
+		track->regs[priv->dreg].bitwise = expr;
 
 	return false;
 }
@@ -447,8 +455,7 @@ static bool nft_bitwise_fast_reduce(struct nft_regs_track *track,
 	}
 
 	if (track->regs[priv->sreg].bitwise) {
-		track->regs[priv->dreg].selector = NULL;
-		track->regs[priv->dreg].bitwise = NULL;
+		nft_reg_track_cancel(track, priv->dreg, NFT_REG32_SIZE);
 		return false;
 	}
 
@@ -522,3 +529,4 @@ bool nft_expr_reduce_bitwise(struct nft_regs_track *track,
 
 	return false;
 }
+EXPORT_SYMBOL_GPL(nft_expr_reduce_bitwise);
diff --git a/net/netfilter/nft_byteorder.c b/net/netfilter/nft_byteorder.c
index e646e9ee4a98..d77609144b26 100644
--- a/net/netfilter/nft_byteorder.c
+++ b/net/netfilter/nft_byteorder.c
@@ -172,8 +172,7 @@ static bool nft_byteorder_reduce(struct nft_regs_track *track,
 {
 	struct nft_byteorder *priv = nft_expr_priv(expr);
 
-	track->regs[priv->dreg].selector = NULL;
-	track->regs[priv->dreg].bitwise = NULL;
+	nft_reg_track_cancel(track, priv->dreg, priv->len);
 
 	return false;
 }
diff --git a/net/netfilter/nft_cmp.c b/net/netfilter/nft_cmp.c
index 47b6d05f1ae6..6528f76ca29e 100644
--- a/net/netfilter/nft_cmp.c
+++ b/net/netfilter/nft_cmp.c
@@ -193,6 +193,7 @@ static const struct nft_expr_ops nft_cmp_ops = {
 	.eval		= nft_cmp_eval,
 	.init		= nft_cmp_init,
 	.dump		= nft_cmp_dump,
+	.reduce		= NFT_REDUCE_READONLY,
 	.offload	= nft_cmp_offload,
 };
 
@@ -269,15 +270,108 @@ const struct nft_expr_ops nft_cmp_fast_ops = {
 	.eval		= NULL,	/* inlined */
 	.init		= nft_cmp_fast_init,
 	.dump		= nft_cmp_fast_dump,
+	.reduce		= NFT_REDUCE_READONLY,
 	.offload	= nft_cmp_fast_offload,
 };
 
+static u32 nft_cmp_mask(u32 bitlen)
+{
+	return (__force u32)cpu_to_le32(~0U >> (sizeof(u32) * BITS_PER_BYTE - bitlen));
+}
+
+static void nft_cmp16_fast_mask(struct nft_data *data, unsigned int bitlen)
+{
+	int len = bitlen / BITS_PER_BYTE;
+	int i, words = len / sizeof(u32);
+
+	for (i = 0; i < words; i++) {
+		data->data[i] = 0xffffffff;
+		bitlen -= sizeof(u32) * BITS_PER_BYTE;
+	}
+
+	if (len % sizeof(u32))
+		data->data[i++] = nft_cmp_mask(bitlen);
+
+	for (; i < 4; i++)
+		data->data[i] = 0;
+}
+
+static int nft_cmp16_fast_init(const struct nft_ctx *ctx,
+			       const struct nft_expr *expr,
+			       const struct nlattr * const tb[])
+{
+	struct nft_cmp16_fast_expr *priv = nft_expr_priv(expr);
+	struct nft_data_desc desc;
+	int err;
+
+	err = nft_data_init(NULL, &priv->data, sizeof(priv->data), &desc,
+			    tb[NFTA_CMP_DATA]);
+	if (err < 0)
+		return err;
+
+	err = nft_parse_register_load(tb[NFTA_CMP_SREG], &priv->sreg, desc.len);
+	if (err < 0)
+		return err;
+
+	nft_cmp16_fast_mask(&priv->mask, desc.len * BITS_PER_BYTE);
+	priv->inv = ntohl(nla_get_be32(tb[NFTA_CMP_OP])) != NFT_CMP_EQ;
+	priv->len = desc.len;
+
+	return 0;
+}
+
+static int nft_cmp16_fast_offload(struct nft_offload_ctx *ctx,
+				  struct nft_flow_rule *flow,
+				  const struct nft_expr *expr)
+{
+	const struct nft_cmp16_fast_expr *priv = nft_expr_priv(expr);
+	struct nft_cmp_expr cmp = {
+		.data	= priv->data,
+		.sreg	= priv->sreg,
+		.len	= priv->len,
+		.op	= priv->inv ? NFT_CMP_NEQ : NFT_CMP_EQ,
+	};
+
+	return __nft_cmp_offload(ctx, flow, &cmp);
+}
+
+static int nft_cmp16_fast_dump(struct sk_buff *skb, const struct nft_expr *expr)
+{
+	const struct nft_cmp16_fast_expr *priv = nft_expr_priv(expr);
+	enum nft_cmp_ops op = priv->inv ? NFT_CMP_NEQ : NFT_CMP_EQ;
+
+	if (nft_dump_register(skb, NFTA_CMP_SREG, priv->sreg))
+		goto nla_put_failure;
+	if (nla_put_be32(skb, NFTA_CMP_OP, htonl(op)))
+		goto nla_put_failure;
+
+	if (nft_data_dump(skb, NFTA_CMP_DATA, &priv->data,
+			  NFT_DATA_VALUE, priv->len) < 0)
+		goto nla_put_failure;
+	return 0;
+
+nla_put_failure:
+	return -1;
+}
+
+
+const struct nft_expr_ops nft_cmp16_fast_ops = {
+	.type		= &nft_cmp_type,
+	.size		= NFT_EXPR_SIZE(sizeof(struct nft_cmp16_fast_expr)),
+	.eval		= NULL,	/* inlined */
+	.init		= nft_cmp16_fast_init,
+	.dump		= nft_cmp16_fast_dump,
+	.reduce		= NFT_REDUCE_READONLY,
+	.offload	= nft_cmp16_fast_offload,
+};
+
 static const struct nft_expr_ops *
 nft_cmp_select_ops(const struct nft_ctx *ctx, const struct nlattr * const tb[])
 {
 	struct nft_data_desc desc;
 	struct nft_data data;
 	enum nft_cmp_ops op;
+	u8 sreg;
 	int err;
 
 	if (tb[NFTA_CMP_SREG] == NULL ||
@@ -306,9 +400,16 @@ nft_cmp_select_ops(const struct nft_ctx *ctx, const struct nlattr * const tb[])
 	if (desc.type != NFT_DATA_VALUE)
 		goto err1;
 
-	if (desc.len <= sizeof(u32) && (op == NFT_CMP_EQ || op == NFT_CMP_NEQ))
-		return &nft_cmp_fast_ops;
+	sreg = ntohl(nla_get_be32(tb[NFTA_CMP_SREG]));
 
+	if (op == NFT_CMP_EQ || op == NFT_CMP_NEQ) {
+		if (desc.len <= sizeof(u32))
+			return &nft_cmp_fast_ops;
+		else if (desc.len <= sizeof(data) &&
+			 ((sreg >= NFT_REG_1 && sreg <= NFT_REG_4) ||
+			  (sreg >= NFT_REG32_00 && sreg <= NFT_REG32_12 && sreg % 2 == 0)))
+			return &nft_cmp16_fast_ops;
+	}
 	return &nft_cmp_ops;
 err1:
 	nft_data_release(&data, desc.type);
diff --git a/net/netfilter/nft_compat.c b/net/netfilter/nft_compat.c
index f69cc73c5813..c16172427622 100644
--- a/net/netfilter/nft_compat.c
+++ b/net/netfilter/nft_compat.c
@@ -731,6 +731,14 @@ static const struct nfnetlink_subsystem nfnl_compat_subsys = {
 
 static struct nft_expr_type nft_match_type;
 
+static bool nft_match_reduce(struct nft_regs_track *track,
+			     const struct nft_expr *expr)
+{
+	const struct xt_match *match = expr->ops->data;
+
+	return strcmp(match->name, "comment") == 0;
+}
+
 static const struct nft_expr_ops *
 nft_match_select_ops(const struct nft_ctx *ctx,
 		     const struct nlattr * const tb[])
@@ -773,6 +781,7 @@ nft_match_select_ops(const struct nft_ctx *ctx,
 	ops->dump = nft_match_dump;
 	ops->validate = nft_match_validate;
 	ops->data = match;
+	ops->reduce = nft_match_reduce;
 
 	matchsize = NFT_EXPR_SIZE(XT_ALIGN(match->matchsize));
 	if (matchsize > NFT_MATCH_LARGE_THRESH) {
@@ -862,6 +871,7 @@ nft_target_select_ops(const struct nft_ctx *ctx,
 	ops->dump = nft_target_dump;
 	ops->validate = nft_target_validate;
 	ops->data = target;
+	ops->reduce = NFT_REDUCE_READONLY;
 
 	if (family == NFPROTO_BRIDGE)
 		ops->eval = nft_target_eval_bridge;
diff --git a/net/netfilter/nft_connlimit.c b/net/netfilter/nft_connlimit.c
index 3362417ebfdb..9de1462e4ac4 100644
--- a/net/netfilter/nft_connlimit.c
+++ b/net/netfilter/nft_connlimit.c
@@ -257,6 +257,7 @@ static const struct nft_expr_ops nft_connlimit_ops = {
 	.destroy_clone	= nft_connlimit_destroy_clone,
 	.dump		= nft_connlimit_dump,
 	.gc		= nft_connlimit_gc,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static struct nft_expr_type nft_connlimit_type __read_mostly = {
diff --git a/net/netfilter/nft_counter.c b/net/netfilter/nft_counter.c
index f179e8c3b0ca..da9083605a61 100644
--- a/net/netfilter/nft_counter.c
+++ b/net/netfilter/nft_counter.c
@@ -293,6 +293,7 @@ static const struct nft_expr_ops nft_counter_ops = {
 	.destroy_clone	= nft_counter_destroy,
 	.dump		= nft_counter_dump,
 	.clone		= nft_counter_clone,
+	.reduce		= NFT_REDUCE_READONLY,
 	.offload	= nft_counter_offload,
 	.offload_stats	= nft_counter_offload_stats,
 };
diff --git a/net/netfilter/nft_ct.c b/net/netfilter/nft_ct.c
index 5adf8bb628a8..d8e1614918a1 100644
--- a/net/netfilter/nft_ct.c
+++ b/net/netfilter/nft_ct.c
@@ -26,6 +26,7 @@
 struct nft_ct {
 	enum nft_ct_keys	key:8;
 	enum ip_conntrack_dir	dir:8;
+	u8			len;
 	union {
 		u8		dreg;
 		u8		sreg;
@@ -500,6 +501,7 @@ static int nft_ct_get_init(const struct nft_ctx *ctx,
 		}
 	}
 
+	priv->len = len;
 	err = nft_parse_register_store(ctx, tb[NFTA_CT_DREG], &priv->dreg, NULL,
 				       NFT_DATA_VALUE, len);
 	if (err < 0)
@@ -608,6 +610,7 @@ static int nft_ct_set_init(const struct nft_ctx *ctx,
 		}
 	}
 
+	priv->len = len;
 	err = nft_parse_register_load(tb[NFTA_CT_SREG], &priv->sreg, len);
 	if (err < 0)
 		goto err1;
@@ -677,6 +680,29 @@ nla_put_failure:
 	return -1;
 }
 
+static bool nft_ct_get_reduce(struct nft_regs_track *track,
+			      const struct nft_expr *expr)
+{
+	const struct nft_ct *priv = nft_expr_priv(expr);
+	const struct nft_ct *ct;
+
+	if (!nft_reg_track_cmp(track, expr, priv->dreg)) {
+		nft_reg_track_update(track, expr, priv->dreg, priv->len);
+		return false;
+	}
+
+	ct = nft_expr_priv(track->regs[priv->dreg].selector);
+	if (priv->key != ct->key) {
+		nft_reg_track_update(track, expr, priv->dreg, priv->len);
+		return false;
+	}
+
+	if (!track->regs[priv->dreg].bitwise)
+		return true;
+
+	return nft_expr_reduce_bitwise(track, expr);
+}
+
 static int nft_ct_set_dump(struct sk_buff *skb, const struct nft_expr *expr)
 {
 	const struct nft_ct *priv = nft_expr_priv(expr);
@@ -710,8 +736,27 @@ static const struct nft_expr_ops nft_ct_get_ops = {
 	.init		= nft_ct_get_init,
 	.destroy	= nft_ct_get_destroy,
 	.dump		= nft_ct_get_dump,
+	.reduce		= nft_ct_get_reduce,
 };
 
+static bool nft_ct_set_reduce(struct nft_regs_track *track,
+			      const struct nft_expr *expr)
+{
+	int i;
+
+	for (i = 0; i < NFT_REG32_NUM; i++) {
+		if (!track->regs[i].selector)
+			continue;
+
+		if (track->regs[i].selector->ops != &nft_ct_get_ops)
+			continue;
+
+		__nft_reg_track_cancel(track, i);
+	}
+
+	return false;
+}
+
 static const struct nft_expr_ops nft_ct_set_ops = {
 	.type		= &nft_ct_type,
 	.size		= NFT_EXPR_SIZE(sizeof(struct nft_ct)),
@@ -719,6 +764,7 @@ static const struct nft_expr_ops nft_ct_set_ops = {
 	.init		= nft_ct_set_init,
 	.destroy	= nft_ct_set_destroy,
 	.dump		= nft_ct_set_dump,
+	.reduce		= nft_ct_set_reduce,
 };
 
 #ifdef CONFIG_NF_CONNTRACK_ZONES
@@ -729,6 +775,7 @@ static const struct nft_expr_ops nft_ct_set_zone_ops = {
 	.init		= nft_ct_set_init,
 	.destroy	= nft_ct_set_destroy,
 	.dump		= nft_ct_set_dump,
+	.reduce		= nft_ct_set_reduce,
 };
 #endif
 
@@ -785,6 +832,7 @@ static const struct nft_expr_ops nft_notrack_ops = {
 	.type		= &nft_notrack_type,
 	.size		= NFT_EXPR_SIZE(0),
 	.eval		= nft_notrack_eval,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static struct nft_expr_type nft_notrack_type __read_mostly = {
@@ -1041,6 +1089,9 @@ static int nft_ct_helper_obj_init(const struct nft_ctx *ctx,
 	if (err < 0)
 		goto err_put_helper;
 
+	/* Avoid the bogus warning, helper will be assigned after CT init */
+	nf_ct_set_auto_assign_helper_warned(ctx->net);
+
 	return 0;
 
 err_put_helper:
diff --git a/net/netfilter/nft_dup_netdev.c b/net/netfilter/nft_dup_netdev.c
index 5b5c607fbf83..63507402716d 100644
--- a/net/netfilter/nft_dup_netdev.c
+++ b/net/netfilter/nft_dup_netdev.c
@@ -79,6 +79,7 @@ static const struct nft_expr_ops nft_dup_netdev_ops = {
 	.eval		= nft_dup_netdev_eval,
 	.init		= nft_dup_netdev_init,
 	.dump		= nft_dup_netdev_dump,
+	.reduce		= NFT_REDUCE_READONLY,
 	.offload	= nft_dup_netdev_offload,
 	.offload_action	= nft_dup_netdev_offload_action,
 };
diff --git a/net/netfilter/nft_dynset.c b/net/netfilter/nft_dynset.c
index 87f3af4645d9..22f70b543fa2 100644
--- a/net/netfilter/nft_dynset.c
+++ b/net/netfilter/nft_dynset.c
@@ -413,6 +413,7 @@ static const struct nft_expr_ops nft_dynset_ops = {
 	.activate	= nft_dynset_activate,
 	.deactivate	= nft_dynset_deactivate,
 	.dump		= nft_dynset_dump,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 struct nft_expr_type nft_dynset_type __read_mostly = {
diff --git a/net/netfilter/nft_exthdr.c b/net/netfilter/nft_exthdr.c
index 9e927ab4df15..22c3e05b52db 100644
--- a/net/netfilter/nft_exthdr.c
+++ b/net/netfilter/nft_exthdr.c
@@ -308,6 +308,63 @@ err:
 	regs->verdict.code = NFT_BREAK;
 }
 
+static void nft_exthdr_tcp_strip_eval(const struct nft_expr *expr,
+				      struct nft_regs *regs,
+				      const struct nft_pktinfo *pkt)
+{
+	u8 buff[sizeof(struct tcphdr) + MAX_TCP_OPTION_SPACE];
+	struct nft_exthdr *priv = nft_expr_priv(expr);
+	unsigned int i, tcphdr_len, optl;
+	struct tcphdr *tcph;
+	u8 *opt;
+
+	tcph = nft_tcp_header_pointer(pkt, sizeof(buff), buff, &tcphdr_len);
+	if (!tcph)
+		goto err;
+
+	if (skb_ensure_writable(pkt->skb, nft_thoff(pkt) + tcphdr_len))
+		goto drop;
+
+	opt = (u8 *)nft_tcp_header_pointer(pkt, sizeof(buff), buff, &tcphdr_len);
+	if (!opt)
+		goto err;
+	for (i = sizeof(*tcph); i < tcphdr_len - 1; i += optl) {
+		unsigned int j;
+
+		optl = optlen(opt, i);
+		if (priv->type != opt[i])
+			continue;
+
+		if (i + optl > tcphdr_len)
+			goto drop;
+
+		for (j = 0; j < optl; ++j) {
+			u16 n = TCPOPT_NOP;
+			u16 o = opt[i+j];
+
+			if ((i + j) % 2 == 0) {
+				o <<= 8;
+				n <<= 8;
+			}
+			inet_proto_csum_replace2(&tcph->check, pkt->skb, htons(o),
+						 htons(n), false);
+		}
+		memset(opt + i, TCPOPT_NOP, optl);
+		return;
+	}
+
+	/* option not found, continue. This allows to do multiple
+	 * option removals per rule.
+	 */
+	return;
+err:
+	regs->verdict.code = NFT_BREAK;
+	return;
+drop:
+	/* can't remove, no choice but to drop */
+	regs->verdict.code = NF_DROP;
+}
+
 static void nft_exthdr_sctp_eval(const struct nft_expr *expr,
 				 struct nft_regs *regs,
 				 const struct nft_pktinfo *pkt)
@@ -457,6 +514,28 @@ static int nft_exthdr_tcp_set_init(const struct nft_ctx *ctx,
 				       priv->len);
 }
 
+static int nft_exthdr_tcp_strip_init(const struct nft_ctx *ctx,
+				     const struct nft_expr *expr,
+				     const struct nlattr * const tb[])
+{
+	struct nft_exthdr *priv = nft_expr_priv(expr);
+
+	if (tb[NFTA_EXTHDR_SREG] ||
+	    tb[NFTA_EXTHDR_DREG] ||
+	    tb[NFTA_EXTHDR_FLAGS] ||
+	    tb[NFTA_EXTHDR_OFFSET] ||
+	    tb[NFTA_EXTHDR_LEN])
+		return -EINVAL;
+
+	if (!tb[NFTA_EXTHDR_TYPE])
+		return -EINVAL;
+
+	priv->type = nla_get_u8(tb[NFTA_EXTHDR_TYPE]);
+	priv->op = NFT_EXTHDR_OP_TCPOPT;
+
+	return 0;
+}
+
 static int nft_exthdr_ipv4_init(const struct nft_ctx *ctx,
 				const struct nft_expr *expr,
 				const struct nlattr * const tb[])
@@ -517,12 +596,47 @@ static int nft_exthdr_dump_set(struct sk_buff *skb, const struct nft_expr *expr)
 	return nft_exthdr_dump_common(skb, priv);
 }
 
+static int nft_exthdr_dump_strip(struct sk_buff *skb, const struct nft_expr *expr)
+{
+	const struct nft_exthdr *priv = nft_expr_priv(expr);
+
+	return nft_exthdr_dump_common(skb, priv);
+}
+
+static bool nft_exthdr_reduce(struct nft_regs_track *track,
+			       const struct nft_expr *expr)
+{
+	const struct nft_exthdr *priv = nft_expr_priv(expr);
+	const struct nft_exthdr *exthdr;
+
+	if (!nft_reg_track_cmp(track, expr, priv->dreg)) {
+		nft_reg_track_update(track, expr, priv->dreg, priv->len);
+		return false;
+	}
+
+	exthdr = nft_expr_priv(track->regs[priv->dreg].selector);
+	if (priv->type != exthdr->type ||
+	    priv->op != exthdr->op ||
+	    priv->flags != exthdr->flags ||
+	    priv->offset != exthdr->offset ||
+	    priv->len != exthdr->len) {
+		nft_reg_track_update(track, expr, priv->dreg, priv->len);
+		return false;
+	}
+
+	if (!track->regs[priv->dreg].bitwise)
+		return true;
+
+	return nft_expr_reduce_bitwise(track, expr);
+}
+
 static const struct nft_expr_ops nft_exthdr_ipv6_ops = {
 	.type		= &nft_exthdr_type,
 	.size		= NFT_EXPR_SIZE(sizeof(struct nft_exthdr)),
 	.eval		= nft_exthdr_ipv6_eval,
 	.init		= nft_exthdr_init,
 	.dump		= nft_exthdr_dump,
+	.reduce		= nft_exthdr_reduce,
 };
 
 static const struct nft_expr_ops nft_exthdr_ipv4_ops = {
@@ -531,6 +645,7 @@ static const struct nft_expr_ops nft_exthdr_ipv4_ops = {
 	.eval		= nft_exthdr_ipv4_eval,
 	.init		= nft_exthdr_ipv4_init,
 	.dump		= nft_exthdr_dump,
+	.reduce		= nft_exthdr_reduce,
 };
 
 static const struct nft_expr_ops nft_exthdr_tcp_ops = {
@@ -539,6 +654,7 @@ static const struct nft_expr_ops nft_exthdr_tcp_ops = {
 	.eval		= nft_exthdr_tcp_eval,
 	.init		= nft_exthdr_init,
 	.dump		= nft_exthdr_dump,
+	.reduce		= nft_exthdr_reduce,
 };
 
 static const struct nft_expr_ops nft_exthdr_tcp_set_ops = {
@@ -547,6 +663,16 @@ static const struct nft_expr_ops nft_exthdr_tcp_set_ops = {
 	.eval		= nft_exthdr_tcp_set_eval,
 	.init		= nft_exthdr_tcp_set_init,
 	.dump		= nft_exthdr_dump_set,
+	.reduce		= NFT_REDUCE_READONLY,
+};
+
+static const struct nft_expr_ops nft_exthdr_tcp_strip_ops = {
+	.type		= &nft_exthdr_type,
+	.size		= NFT_EXPR_SIZE(sizeof(struct nft_exthdr)),
+	.eval		= nft_exthdr_tcp_strip_eval,
+	.init		= nft_exthdr_tcp_strip_init,
+	.dump		= nft_exthdr_dump_strip,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static const struct nft_expr_ops nft_exthdr_sctp_ops = {
@@ -555,6 +681,7 @@ static const struct nft_expr_ops nft_exthdr_sctp_ops = {
 	.eval		= nft_exthdr_sctp_eval,
 	.init		= nft_exthdr_init,
 	.dump		= nft_exthdr_dump,
+	.reduce		= nft_exthdr_reduce,
 };
 
 static const struct nft_expr_ops *
@@ -576,7 +703,7 @@ nft_exthdr_select_ops(const struct nft_ctx *ctx,
 			return &nft_exthdr_tcp_set_ops;
 		if (tb[NFTA_EXTHDR_DREG])
 			return &nft_exthdr_tcp_ops;
-		break;
+		return &nft_exthdr_tcp_strip_ops;
 	case NFT_EXTHDR_OP_IPV6:
 		if (tb[NFTA_EXTHDR_DREG])
 			return &nft_exthdr_ipv6_ops;
diff --git a/net/netfilter/nft_fib.c b/net/netfilter/nft_fib.c
index b10ce732b337..f198f2d9ef90 100644
--- a/net/netfilter/nft_fib.c
+++ b/net/netfilter/nft_fib.c
@@ -156,5 +156,47 @@ void nft_fib_store_result(void *reg, const struct nft_fib *priv,
 }
 EXPORT_SYMBOL_GPL(nft_fib_store_result);
 
+bool nft_fib_reduce(struct nft_regs_track *track,
+		    const struct nft_expr *expr)
+{
+	const struct nft_fib *priv = nft_expr_priv(expr);
+	unsigned int len = NFT_REG32_SIZE;
+	const struct nft_fib *fib;
+
+	switch (priv->result) {
+	case NFT_FIB_RESULT_OIF:
+		break;
+	case NFT_FIB_RESULT_OIFNAME:
+		if (priv->flags & NFTA_FIB_F_PRESENT)
+			len = NFT_REG32_SIZE;
+		else
+			len = IFNAMSIZ;
+		break;
+	case NFT_FIB_RESULT_ADDRTYPE:
+	     break;
+	default:
+		WARN_ON_ONCE(1);
+		break;
+	}
+
+	if (!nft_reg_track_cmp(track, expr, priv->dreg)) {
+		nft_reg_track_update(track, expr, priv->dreg, len);
+		return false;
+	}
+
+	fib = nft_expr_priv(track->regs[priv->dreg].selector);
+	if (priv->result != fib->result ||
+	    priv->flags != fib->flags) {
+		nft_reg_track_update(track, expr, priv->dreg, len);
+		return false;
+	}
+
+	if (!track->regs[priv->dreg].bitwise)
+		return true;
+
+	return false;
+}
+EXPORT_SYMBOL_GPL(nft_fib_reduce);
+
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Florian Westphal <fw@strlen.de>");
diff --git a/net/netfilter/nft_fib_inet.c b/net/netfilter/nft_fib_inet.c
index a88d44e163d1..666a3741d20b 100644
--- a/net/netfilter/nft_fib_inet.c
+++ b/net/netfilter/nft_fib_inet.c
@@ -49,6 +49,7 @@ static const struct nft_expr_ops nft_fib_inet_ops = {
 	.init		= nft_fib_init,
 	.dump		= nft_fib_dump,
 	.validate	= nft_fib_validate,
+	.reduce		= nft_fib_reduce,
 };
 
 static struct nft_expr_type nft_fib_inet_type __read_mostly = {
diff --git a/net/netfilter/nft_fib_netdev.c b/net/netfilter/nft_fib_netdev.c
index 3f3478abd845..9121ec64e918 100644
--- a/net/netfilter/nft_fib_netdev.c
+++ b/net/netfilter/nft_fib_netdev.c
@@ -58,6 +58,7 @@ static const struct nft_expr_ops nft_fib_netdev_ops = {
 	.init		= nft_fib_init,
 	.dump		= nft_fib_dump,
 	.validate	= nft_fib_validate,
+	.reduce		= nft_fib_reduce,
 };
 
 static struct nft_expr_type nft_fib_netdev_type __read_mostly = {
diff --git a/net/netfilter/nft_flow_offload.c b/net/netfilter/nft_flow_offload.c
index 0af34ad41479..900d48c810a1 100644
--- a/net/netfilter/nft_flow_offload.c
+++ b/net/netfilter/nft_flow_offload.c
@@ -298,6 +298,19 @@ static void nft_flow_offload_eval(const struct nft_expr *expr,
 		break;
 	case IPPROTO_UDP:
 		break;
+#ifdef CONFIG_NF_CT_PROTO_GRE
+	case IPPROTO_GRE: {
+		struct nf_conntrack_tuple *tuple;
+
+		if (ct->status & IPS_NAT_MASK)
+			goto out;
+		tuple = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple;
+		/* No support for GRE v1 */
+		if (tuple->src.u.gre.key || tuple->dst.u.gre.key)
+			goto out;
+		break;
+	}
+#endif
 	default:
 		goto out;
 	}
@@ -428,6 +441,7 @@ static const struct nft_expr_ops nft_flow_offload_ops = {
 	.destroy	= nft_flow_offload_destroy,
 	.validate	= nft_flow_offload_validate,
 	.dump		= nft_flow_offload_dump,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static struct nft_expr_type nft_flow_offload_type __read_mostly = {
diff --git a/net/netfilter/nft_fwd_netdev.c b/net/netfilter/nft_fwd_netdev.c
index 619e394a91de..7c5876dc9ff2 100644
--- a/net/netfilter/nft_fwd_netdev.c
+++ b/net/netfilter/nft_fwd_netdev.c
@@ -145,7 +145,7 @@ static void nft_fwd_neigh_eval(const struct nft_expr *expr,
 		return;
 
 	skb->dev = dev;
-	skb->tstamp = 0;
+	skb_clear_tstamp(skb);
 	neigh_xmit(neigh_table, dev, addr, skb);
 out:
 	regs->verdict.code = verdict;
@@ -217,6 +217,7 @@ static const struct nft_expr_ops nft_fwd_neigh_netdev_ops = {
 	.init		= nft_fwd_neigh_init,
 	.dump		= nft_fwd_neigh_dump,
 	.validate	= nft_fwd_validate,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static const struct nft_expr_ops nft_fwd_netdev_ops = {
@@ -226,6 +227,7 @@ static const struct nft_expr_ops nft_fwd_netdev_ops = {
 	.init		= nft_fwd_netdev_init,
 	.dump		= nft_fwd_netdev_dump,
 	.validate	= nft_fwd_validate,
+	.reduce		= NFT_REDUCE_READONLY,
 	.offload	= nft_fwd_netdev_offload,
 	.offload_action	= nft_fwd_netdev_offload_action,
 };
diff --git a/net/netfilter/nft_hash.c b/net/netfilter/nft_hash.c
index f829f5289e16..e5631e88b285 100644
--- a/net/netfilter/nft_hash.c
+++ b/net/netfilter/nft_hash.c
@@ -165,6 +165,16 @@ nla_put_failure:
 	return -1;
 }
 
+static bool nft_jhash_reduce(struct nft_regs_track *track,
+			     const struct nft_expr *expr)
+{
+	const struct nft_jhash *priv = nft_expr_priv(expr);
+
+	nft_reg_track_cancel(track, priv->dreg, sizeof(u32));
+
+	return false;
+}
+
 static int nft_symhash_dump(struct sk_buff *skb,
 			    const struct nft_expr *expr)
 {
@@ -185,6 +195,30 @@ nla_put_failure:
 	return -1;
 }
 
+static bool nft_symhash_reduce(struct nft_regs_track *track,
+			       const struct nft_expr *expr)
+{
+	struct nft_symhash *priv = nft_expr_priv(expr);
+	struct nft_symhash *symhash;
+
+	if (!nft_reg_track_cmp(track, expr, priv->dreg)) {
+		nft_reg_track_update(track, expr, priv->dreg, sizeof(u32));
+		return false;
+	}
+
+	symhash = nft_expr_priv(track->regs[priv->dreg].selector);
+	if (priv->offset != symhash->offset ||
+	    priv->modulus != symhash->modulus) {
+		nft_reg_track_update(track, expr, priv->dreg, sizeof(u32));
+		return false;
+	}
+
+	if (!track->regs[priv->dreg].bitwise)
+		return true;
+
+	return false;
+}
+
 static struct nft_expr_type nft_hash_type;
 static const struct nft_expr_ops nft_jhash_ops = {
 	.type		= &nft_hash_type,
@@ -192,6 +226,7 @@ static const struct nft_expr_ops nft_jhash_ops = {
 	.eval		= nft_jhash_eval,
 	.init		= nft_jhash_init,
 	.dump		= nft_jhash_dump,
+	.reduce		= nft_jhash_reduce,
 };
 
 static const struct nft_expr_ops nft_symhash_ops = {
@@ -200,6 +235,7 @@ static const struct nft_expr_ops nft_symhash_ops = {
 	.eval		= nft_symhash_eval,
 	.init		= nft_symhash_init,
 	.dump		= nft_symhash_dump,
+	.reduce		= nft_symhash_reduce,
 };
 
 static const struct nft_expr_ops *
diff --git a/net/netfilter/nft_immediate.c b/net/netfilter/nft_immediate.c
index d0f67d325bdf..b80f7b507349 100644
--- a/net/netfilter/nft_immediate.c
+++ b/net/netfilter/nft_immediate.c
@@ -223,6 +223,17 @@ static bool nft_immediate_offload_action(const struct nft_expr *expr)
 	return false;
 }
 
+static bool nft_immediate_reduce(struct nft_regs_track *track,
+				 const struct nft_expr *expr)
+{
+	const struct nft_immediate_expr *priv = nft_expr_priv(expr);
+
+	if (priv->dreg != NFT_REG_VERDICT)
+		nft_reg_track_cancel(track, priv->dreg, priv->dlen);
+
+	return false;
+}
+
 static const struct nft_expr_ops nft_imm_ops = {
 	.type		= &nft_imm_type,
 	.size		= NFT_EXPR_SIZE(sizeof(struct nft_immediate_expr)),
@@ -233,6 +244,7 @@ static const struct nft_expr_ops nft_imm_ops = {
 	.destroy	= nft_immediate_destroy,
 	.dump		= nft_immediate_dump,
 	.validate	= nft_immediate_validate,
+	.reduce		= nft_immediate_reduce,
 	.offload	= nft_immediate_offload,
 	.offload_action	= nft_immediate_offload_action,
 };
diff --git a/net/netfilter/nft_last.c b/net/netfilter/nft_last.c
index 4f745a409d34..43d0d4aadb1f 100644
--- a/net/netfilter/nft_last.c
+++ b/net/netfilter/nft_last.c
@@ -120,6 +120,7 @@ static const struct nft_expr_ops nft_last_ops = {
 	.destroy	= nft_last_destroy,
 	.clone		= nft_last_clone,
 	.dump		= nft_last_dump,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 struct nft_expr_type nft_last_type __read_mostly = {
diff --git a/net/netfilter/nft_limit.c b/net/netfilter/nft_limit.c
index a726b623963d..d4a6cf3cd697 100644
--- a/net/netfilter/nft_limit.c
+++ b/net/netfilter/nft_limit.c
@@ -225,6 +225,7 @@ static const struct nft_expr_ops nft_limit_pkts_ops = {
 	.destroy	= nft_limit_pkts_destroy,
 	.clone		= nft_limit_pkts_clone,
 	.dump		= nft_limit_pkts_dump,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static void nft_limit_bytes_eval(const struct nft_expr *expr,
@@ -279,6 +280,7 @@ static const struct nft_expr_ops nft_limit_bytes_ops = {
 	.dump		= nft_limit_bytes_dump,
 	.clone		= nft_limit_bytes_clone,
 	.destroy	= nft_limit_bytes_destroy,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static const struct nft_expr_ops *
diff --git a/net/netfilter/nft_log.c b/net/netfilter/nft_log.c
index 54f6c2035e84..0e13c003f0c1 100644
--- a/net/netfilter/nft_log.c
+++ b/net/netfilter/nft_log.c
@@ -290,6 +290,7 @@ static const struct nft_expr_ops nft_log_ops = {
 	.init		= nft_log_init,
 	.destroy	= nft_log_destroy,
 	.dump		= nft_log_dump,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static struct nft_expr_type nft_log_type __read_mostly = {
diff --git a/net/netfilter/nft_lookup.c b/net/netfilter/nft_lookup.c
index 90becbf5bff3..dfae12759c7c 100644
--- a/net/netfilter/nft_lookup.c
+++ b/net/netfilter/nft_lookup.c
@@ -253,6 +253,17 @@ static int nft_lookup_validate(const struct nft_ctx *ctx,
 	return 0;
 }
 
+static bool nft_lookup_reduce(struct nft_regs_track *track,
+			      const struct nft_expr *expr)
+{
+	const struct nft_lookup *priv = nft_expr_priv(expr);
+
+	if (priv->set->flags & NFT_SET_MAP)
+		nft_reg_track_cancel(track, priv->dreg, priv->set->dlen);
+
+	return false;
+}
+
 static const struct nft_expr_ops nft_lookup_ops = {
 	.type		= &nft_lookup_type,
 	.size		= NFT_EXPR_SIZE(sizeof(struct nft_lookup)),
@@ -263,6 +274,7 @@ static const struct nft_expr_ops nft_lookup_ops = {
 	.destroy	= nft_lookup_destroy,
 	.dump		= nft_lookup_dump,
 	.validate	= nft_lookup_validate,
+	.reduce		= nft_lookup_reduce,
 };
 
 struct nft_expr_type nft_lookup_type __read_mostly = {
diff --git a/net/netfilter/nft_masq.c b/net/netfilter/nft_masq.c
index 9953e8053753..2a0adc497bbb 100644
--- a/net/netfilter/nft_masq.c
+++ b/net/netfilter/nft_masq.c
@@ -129,6 +129,7 @@ static const struct nft_expr_ops nft_masq_ipv4_ops = {
 	.destroy	= nft_masq_ipv4_destroy,
 	.dump		= nft_masq_dump,
 	.validate	= nft_masq_validate,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static struct nft_expr_type nft_masq_ipv4_type __read_mostly = {
@@ -175,6 +176,7 @@ static const struct nft_expr_ops nft_masq_ipv6_ops = {
 	.destroy	= nft_masq_ipv6_destroy,
 	.dump		= nft_masq_dump,
 	.validate	= nft_masq_validate,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static struct nft_expr_type nft_masq_ipv6_type __read_mostly = {
@@ -230,6 +232,7 @@ static const struct nft_expr_ops nft_masq_inet_ops = {
 	.destroy	= nft_masq_inet_destroy,
 	.dump		= nft_masq_dump,
 	.validate	= nft_masq_validate,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static struct nft_expr_type nft_masq_inet_type __read_mostly = {
diff --git a/net/netfilter/nft_meta.c b/net/netfilter/nft_meta.c
index 5ab4df56c945..ac4859241e17 100644
--- a/net/netfilter/nft_meta.c
+++ b/net/netfilter/nft_meta.c
@@ -539,6 +539,7 @@ int nft_meta_get_init(const struct nft_ctx *ctx,
 		return -EOPNOTSUPP;
 	}
 
+	priv->len = len;
 	return nft_parse_register_store(ctx, tb[NFTA_META_DREG], &priv->dreg,
 					NULL, NFT_DATA_VALUE, len);
 }
@@ -664,6 +665,7 @@ int nft_meta_set_init(const struct nft_ctx *ctx,
 		return -EOPNOTSUPP;
 	}
 
+	priv->len = len;
 	err = nft_parse_register_load(tb[NFTA_META_SREG], &priv->sreg, len);
 	if (err < 0)
 		return err;
@@ -750,24 +752,21 @@ static int nft_meta_get_offload(struct nft_offload_ctx *ctx,
 	return 0;
 }
 
-static bool nft_meta_get_reduce(struct nft_regs_track *track,
-				const struct nft_expr *expr)
+bool nft_meta_get_reduce(struct nft_regs_track *track,
+			 const struct nft_expr *expr)
 {
 	const struct nft_meta *priv = nft_expr_priv(expr);
 	const struct nft_meta *meta;
 
-	if (!track->regs[priv->dreg].selector ||
-	    track->regs[priv->dreg].selector->ops != expr->ops) {
-		track->regs[priv->dreg].selector = expr;
-		track->regs[priv->dreg].bitwise = NULL;
+	if (!nft_reg_track_cmp(track, expr, priv->dreg)) {
+		nft_reg_track_update(track, expr, priv->dreg, priv->len);
 		return false;
 	}
 
 	meta = nft_expr_priv(track->regs[priv->dreg].selector);
 	if (priv->key != meta->key ||
 	    priv->dreg != meta->dreg) {
-		track->regs[priv->dreg].selector = expr;
-		track->regs[priv->dreg].bitwise = NULL;
+		nft_reg_track_update(track, expr, priv->dreg, priv->len);
 		return false;
 	}
 
@@ -776,6 +775,7 @@ static bool nft_meta_get_reduce(struct nft_regs_track *track,
 
 	return nft_expr_reduce_bitwise(track, expr);
 }
+EXPORT_SYMBOL_GPL(nft_meta_get_reduce);
 
 static const struct nft_expr_ops nft_meta_get_ops = {
 	.type		= &nft_meta_type,
@@ -800,8 +800,7 @@ static bool nft_meta_set_reduce(struct nft_regs_track *track,
 		if (track->regs[i].selector->ops != &nft_meta_get_ops)
 			continue;
 
-		track->regs[i].selector = NULL;
-		track->regs[i].bitwise = NULL;
+		__nft_reg_track_cancel(track, i);
 	}
 
 	return false;
diff --git a/net/netfilter/nft_nat.c b/net/netfilter/nft_nat.c
index be1595d6979d..4394df4bc99b 100644
--- a/net/netfilter/nft_nat.c
+++ b/net/netfilter/nft_nat.c
@@ -317,6 +317,7 @@ static const struct nft_expr_ops nft_nat_ops = {
 	.destroy        = nft_nat_destroy,
 	.dump           = nft_nat_dump,
 	.validate	= nft_nat_validate,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static struct nft_expr_type nft_nat_type __read_mostly = {
@@ -346,6 +347,7 @@ static const struct nft_expr_ops nft_nat_inet_ops = {
 	.destroy        = nft_nat_destroy,
 	.dump           = nft_nat_dump,
 	.validate	= nft_nat_validate,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static struct nft_expr_type nft_inet_nat_type __read_mostly = {
diff --git a/net/netfilter/nft_numgen.c b/net/netfilter/nft_numgen.c
index 1d378efd8823..81b40c663d86 100644
--- a/net/netfilter/nft_numgen.c
+++ b/net/netfilter/nft_numgen.c
@@ -85,6 +85,16 @@ err:
 	return err;
 }
 
+static bool nft_ng_inc_reduce(struct nft_regs_track *track,
+				 const struct nft_expr *expr)
+{
+	const struct nft_ng_inc *priv = nft_expr_priv(expr);
+
+	nft_reg_track_cancel(track, priv->dreg, NFT_REG32_SIZE);
+
+	return false;
+}
+
 static int nft_ng_dump(struct sk_buff *skb, enum nft_registers dreg,
 		       u32 modulus, enum nft_ng_types type, u32 offset)
 {
@@ -172,6 +182,16 @@ static int nft_ng_random_dump(struct sk_buff *skb, const struct nft_expr *expr)
 			   priv->offset);
 }
 
+static bool nft_ng_random_reduce(struct nft_regs_track *track,
+				 const struct nft_expr *expr)
+{
+	const struct nft_ng_random *priv = nft_expr_priv(expr);
+
+	nft_reg_track_cancel(track, priv->dreg, NFT_REG32_SIZE);
+
+	return false;
+}
+
 static struct nft_expr_type nft_ng_type;
 static const struct nft_expr_ops nft_ng_inc_ops = {
 	.type		= &nft_ng_type,
@@ -180,6 +200,7 @@ static const struct nft_expr_ops nft_ng_inc_ops = {
 	.init		= nft_ng_inc_init,
 	.destroy	= nft_ng_inc_destroy,
 	.dump		= nft_ng_inc_dump,
+	.reduce		= nft_ng_inc_reduce,
 };
 
 static const struct nft_expr_ops nft_ng_random_ops = {
@@ -188,6 +209,7 @@ static const struct nft_expr_ops nft_ng_random_ops = {
 	.eval		= nft_ng_random_eval,
 	.init		= nft_ng_random_init,
 	.dump		= nft_ng_random_dump,
+	.reduce		= nft_ng_random_reduce,
 };
 
 static const struct nft_expr_ops *
diff --git a/net/netfilter/nft_objref.c b/net/netfilter/nft_objref.c
index 94b2327e71dc..5d8d91b3904d 100644
--- a/net/netfilter/nft_objref.c
+++ b/net/netfilter/nft_objref.c
@@ -91,6 +91,7 @@ static const struct nft_expr_ops nft_objref_ops = {
 	.activate	= nft_objref_activate,
 	.deactivate	= nft_objref_deactivate,
 	.dump		= nft_objref_dump,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 struct nft_objref_map {
@@ -204,6 +205,7 @@ static const struct nft_expr_ops nft_objref_map_ops = {
 	.deactivate	= nft_objref_map_deactivate,
 	.destroy	= nft_objref_map_destroy,
 	.dump		= nft_objref_map_dump,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static const struct nft_expr_ops *
diff --git a/net/netfilter/nft_osf.c b/net/netfilter/nft_osf.c
index d82677e83400..5eed18f90b02 100644
--- a/net/netfilter/nft_osf.c
+++ b/net/netfilter/nft_osf.c
@@ -120,6 +120,30 @@ static int nft_osf_validate(const struct nft_ctx *ctx,
 						    (1 << NF_INET_FORWARD));
 }
 
+static bool nft_osf_reduce(struct nft_regs_track *track,
+			   const struct nft_expr *expr)
+{
+	struct nft_osf *priv = nft_expr_priv(expr);
+	struct nft_osf *osf;
+
+	if (!nft_reg_track_cmp(track, expr, priv->dreg)) {
+		nft_reg_track_update(track, expr, priv->dreg, NFT_OSF_MAXGENRELEN);
+		return false;
+	}
+
+	osf = nft_expr_priv(track->regs[priv->dreg].selector);
+	if (priv->flags != osf->flags ||
+	    priv->ttl != osf->ttl) {
+		nft_reg_track_update(track, expr, priv->dreg, NFT_OSF_MAXGENRELEN);
+		return false;
+	}
+
+	if (!track->regs[priv->dreg].bitwise)
+		return true;
+
+	return false;
+}
+
 static struct nft_expr_type nft_osf_type;
 static const struct nft_expr_ops nft_osf_op = {
 	.eval		= nft_osf_eval,
@@ -128,6 +152,7 @@ static const struct nft_expr_ops nft_osf_op = {
 	.dump		= nft_osf_dump,
 	.type		= &nft_osf_type,
 	.validate	= nft_osf_validate,
+	.reduce		= nft_osf_reduce,
 };
 
 static struct nft_expr_type nft_osf_type __read_mostly = {
diff --git a/net/netfilter/nft_payload.c b/net/netfilter/nft_payload.c
index 5cc06aef4345..2e7ac007cb30 100644
--- a/net/netfilter/nft_payload.c
+++ b/net/netfilter/nft_payload.c
@@ -216,10 +216,8 @@ static bool nft_payload_reduce(struct nft_regs_track *track,
 	const struct nft_payload *priv = nft_expr_priv(expr);
 	const struct nft_payload *payload;
 
-	if (!track->regs[priv->dreg].selector ||
-	    track->regs[priv->dreg].selector->ops != expr->ops) {
-		track->regs[priv->dreg].selector = expr;
-		track->regs[priv->dreg].bitwise = NULL;
+	if (!nft_reg_track_cmp(track, expr, priv->dreg)) {
+		nft_reg_track_update(track, expr, priv->dreg, priv->len);
 		return false;
 	}
 
@@ -227,8 +225,7 @@ static bool nft_payload_reduce(struct nft_regs_track *track,
 	if (priv->base != payload->base ||
 	    priv->offset != payload->offset ||
 	    priv->len != payload->len) {
-		track->regs[priv->dreg].selector = expr;
-		track->regs[priv->dreg].bitwise = NULL;
+		nft_reg_track_update(track, expr, priv->dreg, priv->len);
 		return false;
 	}
 
@@ -815,8 +812,7 @@ static bool nft_payload_set_reduce(struct nft_regs_track *track,
 		    track->regs[i].selector->ops != &nft_payload_fast_ops)
 			continue;
 
-		track->regs[i].selector = NULL;
-		track->regs[i].bitwise = NULL;
+		__nft_reg_track_cancel(track, i);
 	}
 
 	return false;
diff --git a/net/netfilter/nft_queue.c b/net/netfilter/nft_queue.c
index 9ba1de51ac07..15e4b7640dc0 100644
--- a/net/netfilter/nft_queue.c
+++ b/net/netfilter/nft_queue.c
@@ -164,6 +164,7 @@ static const struct nft_expr_ops nft_queue_ops = {
 	.eval		= nft_queue_eval,
 	.init		= nft_queue_init,
 	.dump		= nft_queue_dump,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static const struct nft_expr_ops nft_queue_sreg_ops = {
@@ -172,6 +173,7 @@ static const struct nft_expr_ops nft_queue_sreg_ops = {
 	.eval		= nft_queue_sreg_eval,
 	.init		= nft_queue_sreg_init,
 	.dump		= nft_queue_sreg_dump,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static const struct nft_expr_ops *
diff --git a/net/netfilter/nft_quota.c b/net/netfilter/nft_quota.c
index f394a0b562f6..d7db57ed3bc1 100644
--- a/net/netfilter/nft_quota.c
+++ b/net/netfilter/nft_quota.c
@@ -254,6 +254,7 @@ static const struct nft_expr_ops nft_quota_ops = {
 	.destroy	= nft_quota_destroy,
 	.clone		= nft_quota_clone,
 	.dump		= nft_quota_dump,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static struct nft_expr_type nft_quota_type __read_mostly = {
diff --git a/net/netfilter/nft_range.c b/net/netfilter/nft_range.c
index e4a1c44d7f51..66f77484c227 100644
--- a/net/netfilter/nft_range.c
+++ b/net/netfilter/nft_range.c
@@ -140,6 +140,7 @@ static const struct nft_expr_ops nft_range_ops = {
 	.eval		= nft_range_eval,
 	.init		= nft_range_init,
 	.dump		= nft_range_dump,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 struct nft_expr_type nft_range_type __read_mostly = {
diff --git a/net/netfilter/nft_redir.c b/net/netfilter/nft_redir.c
index ba09890dddb5..5086adfe731c 100644
--- a/net/netfilter/nft_redir.c
+++ b/net/netfilter/nft_redir.c
@@ -134,6 +134,7 @@ static const struct nft_expr_ops nft_redir_ipv4_ops = {
 	.destroy	= nft_redir_ipv4_destroy,
 	.dump		= nft_redir_dump,
 	.validate	= nft_redir_validate,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static struct nft_expr_type nft_redir_ipv4_type __read_mostly = {
@@ -183,6 +184,7 @@ static const struct nft_expr_ops nft_redir_ipv6_ops = {
 	.destroy	= nft_redir_ipv6_destroy,
 	.dump		= nft_redir_dump,
 	.validate	= nft_redir_validate,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static struct nft_expr_type nft_redir_ipv6_type __read_mostly = {
@@ -225,6 +227,7 @@ static const struct nft_expr_ops nft_redir_inet_ops = {
 	.destroy	= nft_redir_inet_destroy,
 	.dump		= nft_redir_dump,
 	.validate	= nft_redir_validate,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static struct nft_expr_type nft_redir_inet_type __read_mostly = {
diff --git a/net/netfilter/nft_reject_inet.c b/net/netfilter/nft_reject_inet.c
index 554caf967baa..973fa31a9dd6 100644
--- a/net/netfilter/nft_reject_inet.c
+++ b/net/netfilter/nft_reject_inet.c
@@ -80,6 +80,7 @@ static const struct nft_expr_ops nft_reject_inet_ops = {
 	.init		= nft_reject_init,
 	.dump		= nft_reject_dump,
 	.validate	= nft_reject_inet_validate,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static struct nft_expr_type nft_reject_inet_type __read_mostly = {
diff --git a/net/netfilter/nft_reject_netdev.c b/net/netfilter/nft_reject_netdev.c
index 61cd8c4ac385..7865cd8b11bb 100644
--- a/net/netfilter/nft_reject_netdev.c
+++ b/net/netfilter/nft_reject_netdev.c
@@ -159,6 +159,7 @@ static const struct nft_expr_ops nft_reject_netdev_ops = {
 	.init		= nft_reject_init,
 	.dump		= nft_reject_dump,
 	.validate	= nft_reject_netdev_validate,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static struct nft_expr_type nft_reject_netdev_type __read_mostly = {
diff --git a/net/netfilter/nft_rt.c b/net/netfilter/nft_rt.c
index bcd01a63e38f..71931ec91721 100644
--- a/net/netfilter/nft_rt.c
+++ b/net/netfilter/nft_rt.c
@@ -191,6 +191,7 @@ static const struct nft_expr_ops nft_rt_get_ops = {
 	.init		= nft_rt_get_init,
 	.dump		= nft_rt_get_dump,
 	.validate	= nft_rt_validate,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 struct nft_expr_type nft_rt_type __read_mostly = {
diff --git a/net/netfilter/nft_socket.c b/net/netfilter/nft_socket.c
index d601974c9d2e..bd3792f080ed 100644
--- a/net/netfilter/nft_socket.c
+++ b/net/netfilter/nft_socket.c
@@ -10,6 +10,7 @@
 struct nft_socket {
 	enum nft_socket_keys		key:8;
 	u8				level;
+	u8				len;
 	union {
 		u8			dreg;
 	};
@@ -179,6 +180,7 @@ static int nft_socket_init(const struct nft_ctx *ctx,
 		return -EOPNOTSUPP;
 	}
 
+	priv->len = len;
 	return nft_parse_register_store(ctx, tb[NFTA_SOCKET_DREG], &priv->dreg,
 					NULL, NFT_DATA_VALUE, len);
 }
@@ -198,6 +200,31 @@ static int nft_socket_dump(struct sk_buff *skb,
 	return 0;
 }
 
+static bool nft_socket_reduce(struct nft_regs_track *track,
+			      const struct nft_expr *expr)
+{
+	const struct nft_socket *priv = nft_expr_priv(expr);
+	const struct nft_socket *socket;
+
+	if (!nft_reg_track_cmp(track, expr, priv->dreg)) {
+		nft_reg_track_update(track, expr, priv->dreg, priv->len);
+		return false;
+	}
+
+	socket = nft_expr_priv(track->regs[priv->dreg].selector);
+	if (priv->key != socket->key ||
+	    priv->dreg != socket->dreg ||
+	    priv->level != socket->level) {
+		nft_reg_track_update(track, expr, priv->dreg, priv->len);
+		return false;
+	}
+
+	if (!track->regs[priv->dreg].bitwise)
+		return true;
+
+	return nft_expr_reduce_bitwise(track, expr);
+}
+
 static struct nft_expr_type nft_socket_type;
 static const struct nft_expr_ops nft_socket_ops = {
 	.type		= &nft_socket_type,
@@ -205,6 +232,7 @@ static const struct nft_expr_ops nft_socket_ops = {
 	.eval		= nft_socket_eval,
 	.init		= nft_socket_init,
 	.dump		= nft_socket_dump,
+	.reduce		= nft_socket_reduce,
 };
 
 static struct nft_expr_type nft_socket_type __read_mostly = {
diff --git a/net/netfilter/nft_synproxy.c b/net/netfilter/nft_synproxy.c
index 1133e06f3c40..6cf9a04fbfe2 100644
--- a/net/netfilter/nft_synproxy.c
+++ b/net/netfilter/nft_synproxy.c
@@ -288,6 +288,7 @@ static const struct nft_expr_ops nft_synproxy_ops = {
 	.dump		= nft_synproxy_dump,
 	.type		= &nft_synproxy_type,
 	.validate	= nft_synproxy_validate,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static struct nft_expr_type nft_synproxy_type __read_mostly = {
diff --git a/net/netfilter/nft_tproxy.c b/net/netfilter/nft_tproxy.c
index b5b09a902c7a..801f013971df 100644
--- a/net/netfilter/nft_tproxy.c
+++ b/net/netfilter/nft_tproxy.c
@@ -320,6 +320,7 @@ static const struct nft_expr_ops nft_tproxy_ops = {
 	.init		= nft_tproxy_init,
 	.destroy	= nft_tproxy_destroy,
 	.dump		= nft_tproxy_dump,
+	.reduce		= NFT_REDUCE_READONLY,
 };
 
 static struct nft_expr_type nft_tproxy_type __read_mostly = {
diff --git a/net/netfilter/nft_tunnel.c b/net/netfilter/nft_tunnel.c
index 3b27926d5382..d0f9b1d51b0e 100644
--- a/net/netfilter/nft_tunnel.c
+++ b/net/netfilter/nft_tunnel.c
@@ -17,6 +17,7 @@ struct nft_tunnel {
 	enum nft_tunnel_keys	key:8;
 	u8			dreg;
 	enum nft_tunnel_mode	mode:8;
+	u8			len;
 };
 
 static void nft_tunnel_get_eval(const struct nft_expr *expr,
@@ -101,6 +102,7 @@ static int nft_tunnel_get_init(const struct nft_ctx *ctx,
 		priv->mode = NFT_TUNNEL_MODE_NONE;
 	}
 
+	priv->len = len;
 	return nft_parse_register_store(ctx, tb[NFTA_TUNNEL_DREG], &priv->dreg,
 					NULL, NFT_DATA_VALUE, len);
 }
@@ -122,6 +124,31 @@ nla_put_failure:
 	return -1;
 }
 
+static bool nft_tunnel_get_reduce(struct nft_regs_track *track,
+				  const struct nft_expr *expr)
+{
+	const struct nft_tunnel *priv = nft_expr_priv(expr);
+	const struct nft_tunnel *tunnel;
+
+	if (!nft_reg_track_cmp(track, expr, priv->dreg)) {
+		nft_reg_track_update(track, expr, priv->dreg, priv->len);
+		return false;
+	}
+
+	tunnel = nft_expr_priv(track->regs[priv->dreg].selector);
+	if (priv->key != tunnel->key ||
+	    priv->dreg != tunnel->dreg ||
+	    priv->mode != tunnel->mode) {
+		nft_reg_track_update(track, expr, priv->dreg, priv->len);
+		return false;
+	}
+
+	if (!track->regs[priv->dreg].bitwise)
+		return true;
+
+	return false;
+}
+
 static struct nft_expr_type nft_tunnel_type;
 static const struct nft_expr_ops nft_tunnel_get_ops = {
 	.type		= &nft_tunnel_type,
@@ -129,6 +156,7 @@ static const struct nft_expr_ops nft_tunnel_get_ops = {
 	.eval		= nft_tunnel_get_eval,
 	.init		= nft_tunnel_get_init,
 	.dump		= nft_tunnel_get_dump,
+	.reduce		= nft_tunnel_get_reduce,
 };
 
 static struct nft_expr_type nft_tunnel_type __read_mostly = {
diff --git a/net/netfilter/nft_xfrm.c b/net/netfilter/nft_xfrm.c
index cbbbc4ecad3a..becb88fa4e9b 100644
--- a/net/netfilter/nft_xfrm.c
+++ b/net/netfilter/nft_xfrm.c
@@ -27,6 +27,7 @@ struct nft_xfrm {
 	u8			dreg;
 	u8			dir;
 	u8			spnum;
+	u8			len;
 };
 
 static int nft_xfrm_get_init(const struct nft_ctx *ctx,
@@ -86,6 +87,7 @@ static int nft_xfrm_get_init(const struct nft_ctx *ctx,
 
 	priv->spnum = spnum;
 
+	priv->len = len;
 	return nft_parse_register_store(ctx, tb[NFTA_XFRM_DREG], &priv->dreg,
 					NULL, NFT_DATA_VALUE, len);
 }
@@ -252,6 +254,31 @@ static int nft_xfrm_validate(const struct nft_ctx *ctx, const struct nft_expr *e
 	return nft_chain_validate_hooks(ctx->chain, hooks);
 }
 
+static bool nft_xfrm_reduce(struct nft_regs_track *track,
+			    const struct nft_expr *expr)
+{
+	const struct nft_xfrm *priv = nft_expr_priv(expr);
+	const struct nft_xfrm *xfrm;
+
+	if (!nft_reg_track_cmp(track, expr, priv->dreg)) {
+		nft_reg_track_update(track, expr, priv->dreg, priv->len);
+		return false;
+	}
+
+	xfrm = nft_expr_priv(track->regs[priv->dreg].selector);
+	if (priv->key != xfrm->key ||
+	    priv->dreg != xfrm->dreg ||
+	    priv->dir != xfrm->dir ||
+	    priv->spnum != xfrm->spnum) {
+		nft_reg_track_update(track, expr, priv->dreg, priv->len);
+		return false;
+	}
+
+	if (!track->regs[priv->dreg].bitwise)
+		return true;
+
+	return nft_expr_reduce_bitwise(track, expr);
+}
 
 static struct nft_expr_type nft_xfrm_type;
 static const struct nft_expr_ops nft_xfrm_get_ops = {
@@ -261,6 +288,7 @@ static const struct nft_expr_ops nft_xfrm_get_ops = {
 	.init		= nft_xfrm_get_init,
 	.dump		= nft_xfrm_get_dump,
 	.validate	= nft_xfrm_validate,
+	.reduce		= nft_xfrm_reduce,
 };
 
 static struct nft_expr_type nft_xfrm_type __read_mostly = {
diff --git a/net/netlabel/netlabel_kapi.c b/net/netlabel/netlabel_kapi.c
index beb0e573266d..54c083003947 100644
--- a/net/netlabel/netlabel_kapi.c
+++ b/net/netlabel/netlabel_kapi.c
@@ -885,6 +885,8 @@ int netlbl_bitmap_walk(const unsigned char *bitmap, u32 bitmap_len,
 	unsigned char bitmask;
 	unsigned char byte;
 
+	if (offset >= bitmap_len)
+		return -1;
 	byte_offset = offset / 8;
 	byte = bitmap[byte_offset];
 	bit_spot = offset;
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 7b344035bfe3..47a876ccd288 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -159,6 +159,8 @@ EXPORT_SYMBOL(do_trace_netlink_extack);
 
 static inline u32 netlink_group_mask(u32 group)
 {
+	if (group > 32)
+		return 0;
 	return group ? 1 << (group - 1) : 0;
 }
 
diff --git a/net/nfc/llcp.h b/net/nfc/llcp.h
index d49d4bf2e37c..c1d9be636933 100644
--- a/net/nfc/llcp.h
+++ b/net/nfc/llcp.h
@@ -6,7 +6,6 @@
 enum llcp_state {
 	LLCP_CONNECTED = 1, /* wait_for_packet() wants that */
 	LLCP_CONNECTING,
-	LLCP_DISCONNECTING,
 	LLCP_CLOSED,
 	LLCP_BOUND,
 	LLCP_LISTEN,
diff --git a/net/nfc/llcp_core.c b/net/nfc/llcp_core.c
index 5ad5157aa9c5..3364caabef8b 100644
--- a/net/nfc/llcp_core.c
+++ b/net/nfc/llcp_core.c
@@ -383,7 +383,7 @@ u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local,
 			pr_debug("WKS %d\n", ssap);
 
 			/* This is a WKS, let's check if it's free */
-			if (local->local_wks & BIT(ssap)) {
+			if (test_bit(ssap, &local->local_wks)) {
 				mutex_unlock(&local->sdp_lock);
 
 				return LLCP_SAP_MAX;
@@ -737,13 +737,6 @@ static void nfc_llcp_tx_work(struct work_struct *work)
 			print_hex_dump_debug("LLCP Tx: ", DUMP_PREFIX_OFFSET,
 					     16, 1, skb->data, skb->len, true);
 
-			if (ptype == LLCP_PDU_DISC && sk != NULL &&
-			    sk->sk_state == LLCP_DISCONNECTING) {
-				nfc_llcp_sock_unlink(&local->sockets, sk);
-				sock_orphan(sk);
-				sock_put(sk);
-			}
-
 			if (ptype == LLCP_PDU_I)
 				copy_skb = skb_copy(skb, GFP_ATOMIC);
 
diff --git a/net/nfc/llcp_sock.c b/net/nfc/llcp_sock.c
index 0b93a17b9f11..4ca35791c93b 100644
--- a/net/nfc/llcp_sock.c
+++ b/net/nfc/llcp_sock.c
@@ -108,21 +108,13 @@ static int llcp_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
 					  llcp_sock->service_name_len,
 					  GFP_KERNEL);
 	if (!llcp_sock->service_name) {
-		nfc_llcp_local_put(llcp_sock->local);
-		llcp_sock->local = NULL;
-		llcp_sock->dev = NULL;
 		ret = -ENOMEM;
-		goto put_dev;
+		goto sock_llcp_put_local;
 	}
 	llcp_sock->ssap = nfc_llcp_get_sdp_ssap(local, llcp_sock);
 	if (llcp_sock->ssap == LLCP_SAP_MAX) {
-		nfc_llcp_local_put(llcp_sock->local);
-		llcp_sock->local = NULL;
-		kfree(llcp_sock->service_name);
-		llcp_sock->service_name = NULL;
-		llcp_sock->dev = NULL;
 		ret = -EADDRINUSE;
-		goto put_dev;
+		goto free_service_name;
 	}
 
 	llcp_sock->reserved_ssap = llcp_sock->ssap;
@@ -132,6 +124,19 @@ static int llcp_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
 	pr_debug("Socket bound to SAP %d\n", llcp_sock->ssap);
 
 	sk->sk_state = LLCP_BOUND;
+	nfc_put_device(dev);
+	release_sock(sk);
+
+	return 0;
+
+free_service_name:
+	kfree(llcp_sock->service_name);
+	llcp_sock->service_name = NULL;
+
+sock_llcp_put_local:
+	nfc_llcp_local_put(llcp_sock->local);
+	llcp_sock->local = NULL;
+	llcp_sock->dev = NULL;
 
 put_dev:
 	nfc_put_device(dev);
@@ -626,23 +631,16 @@ static int llcp_sock_release(struct socket *sock)
 		}
 	}
 
-	if (llcp_sock->reserved_ssap < LLCP_SAP_MAX)
-		nfc_llcp_put_ssap(llcp_sock->local, llcp_sock->ssap);
-
-	release_sock(sk);
-
-	/* Keep this sock alive and therefore do not remove it from the sockets
-	 * list until the DISC PDU has been actually sent. Otherwise we would
-	 * reply with DM PDUs before sending the DISC one.
-	 */
-	if (sk->sk_state == LLCP_DISCONNECTING)
-		return err;
-
 	if (sock->type == SOCK_RAW)
 		nfc_llcp_sock_unlink(&local->raw_sockets, sk);
 	else
 		nfc_llcp_sock_unlink(&local->sockets, sk);
 
+	if (llcp_sock->reserved_ssap < LLCP_SAP_MAX)
+		nfc_llcp_put_ssap(llcp_sock->local, llcp_sock->ssap);
+
+	release_sock(sk);
+
 out:
 	sock_orphan(sk);
 	sock_put(sk);
@@ -712,10 +710,8 @@ static int llcp_sock_connect(struct socket *sock, struct sockaddr *_addr,
 	llcp_sock->local = nfc_llcp_local_get(local);
 	llcp_sock->ssap = nfc_llcp_get_local_ssap(local);
 	if (llcp_sock->ssap == LLCP_SAP_MAX) {
-		nfc_llcp_local_put(llcp_sock->local);
-		llcp_sock->local = NULL;
 		ret = -ENOMEM;
-		goto put_dev;
+		goto sock_llcp_put_local;
 	}
 
 	llcp_sock->reserved_ssap = llcp_sock->ssap;
@@ -760,8 +756,11 @@ sock_unlink:
 
 sock_llcp_release:
 	nfc_llcp_put_ssap(local, llcp_sock->ssap);
+
+sock_llcp_put_local:
 	nfc_llcp_local_put(llcp_sock->local);
 	llcp_sock->local = NULL;
+	llcp_sock->dev = NULL;
 
 put_dev:
 	nfc_put_device(dev);
diff --git a/net/openvswitch/conntrack.c b/net/openvswitch/conntrack.c
index c07afff57dd3..4a947c13c813 100644
--- a/net/openvswitch/conntrack.c
+++ b/net/openvswitch/conntrack.c
@@ -734,6 +734,57 @@ static bool skb_nfct_cached(struct net *net,
 }
 
 #if IS_ENABLED(CONFIG_NF_NAT)
+static void ovs_nat_update_key(struct sw_flow_key *key,
+			       const struct sk_buff *skb,
+			       enum nf_nat_manip_type maniptype)
+{
+	if (maniptype == NF_NAT_MANIP_SRC) {
+		__be16 src;
+
+		key->ct_state |= OVS_CS_F_SRC_NAT;
+		if (key->eth.type == htons(ETH_P_IP))
+			key->ipv4.addr.src = ip_hdr(skb)->saddr;
+		else if (key->eth.type == htons(ETH_P_IPV6))
+			memcpy(&key->ipv6.addr.src, &ipv6_hdr(skb)->saddr,
+			       sizeof(key->ipv6.addr.src));
+		else
+			return;
+
+		if (key->ip.proto == IPPROTO_UDP)
+			src = udp_hdr(skb)->source;
+		else if (key->ip.proto == IPPROTO_TCP)
+			src = tcp_hdr(skb)->source;
+		else if (key->ip.proto == IPPROTO_SCTP)
+			src = sctp_hdr(skb)->source;
+		else
+			return;
+
+		key->tp.src = src;
+	} else {
+		__be16 dst;
+
+		key->ct_state |= OVS_CS_F_DST_NAT;
+		if (key->eth.type == htons(ETH_P_IP))
+			key->ipv4.addr.dst = ip_hdr(skb)->daddr;
+		else if (key->eth.type == htons(ETH_P_IPV6))
+			memcpy(&key->ipv6.addr.dst, &ipv6_hdr(skb)->daddr,
+			       sizeof(key->ipv6.addr.dst));
+		else
+			return;
+
+		if (key->ip.proto == IPPROTO_UDP)
+			dst = udp_hdr(skb)->dest;
+		else if (key->ip.proto == IPPROTO_TCP)
+			dst = tcp_hdr(skb)->dest;
+		else if (key->ip.proto == IPPROTO_SCTP)
+			dst = sctp_hdr(skb)->dest;
+		else
+			return;
+
+		key->tp.dst = dst;
+	}
+}
+
 /* Modelled after nf_nat_ipv[46]_fn().
  * range is only used for new, uninitialized NAT state.
  * Returns either NF_ACCEPT or NF_DROP.
@@ -741,7 +792,7 @@ static bool skb_nfct_cached(struct net *net,
 static int ovs_ct_nat_execute(struct sk_buff *skb, struct nf_conn *ct,
 			      enum ip_conntrack_info ctinfo,
 			      const struct nf_nat_range2 *range,
-			      enum nf_nat_manip_type maniptype)
+			      enum nf_nat_manip_type maniptype, struct sw_flow_key *key)
 {
 	int hooknum, nh_off, err = NF_ACCEPT;
 
@@ -813,58 +864,11 @@ static int ovs_ct_nat_execute(struct sk_buff *skb, struct nf_conn *ct,
 push:
 	skb_push_rcsum(skb, nh_off);
 
-	return err;
-}
-
-static void ovs_nat_update_key(struct sw_flow_key *key,
-			       const struct sk_buff *skb,
-			       enum nf_nat_manip_type maniptype)
-{
-	if (maniptype == NF_NAT_MANIP_SRC) {
-		__be16 src;
-
-		key->ct_state |= OVS_CS_F_SRC_NAT;
-		if (key->eth.type == htons(ETH_P_IP))
-			key->ipv4.addr.src = ip_hdr(skb)->saddr;
-		else if (key->eth.type == htons(ETH_P_IPV6))
-			memcpy(&key->ipv6.addr.src, &ipv6_hdr(skb)->saddr,
-			       sizeof(key->ipv6.addr.src));
-		else
-			return;
-
-		if (key->ip.proto == IPPROTO_UDP)
-			src = udp_hdr(skb)->source;
-		else if (key->ip.proto == IPPROTO_TCP)
-			src = tcp_hdr(skb)->source;
-		else if (key->ip.proto == IPPROTO_SCTP)
-			src = sctp_hdr(skb)->source;
-		else
-			return;
-
-		key->tp.src = src;
-	} else {
-		__be16 dst;
-
-		key->ct_state |= OVS_CS_F_DST_NAT;
-		if (key->eth.type == htons(ETH_P_IP))
-			key->ipv4.addr.dst = ip_hdr(skb)->daddr;
-		else if (key->eth.type == htons(ETH_P_IPV6))
-			memcpy(&key->ipv6.addr.dst, &ipv6_hdr(skb)->daddr,
-			       sizeof(key->ipv6.addr.dst));
-		else
-			return;
-
-		if (key->ip.proto == IPPROTO_UDP)
-			dst = udp_hdr(skb)->dest;
-		else if (key->ip.proto == IPPROTO_TCP)
-			dst = tcp_hdr(skb)->dest;
-		else if (key->ip.proto == IPPROTO_SCTP)
-			dst = sctp_hdr(skb)->dest;
-		else
-			return;
+	/* Update the flow key if NAT successful. */
+	if (err == NF_ACCEPT)
+		ovs_nat_update_key(key, skb, maniptype);
 
-		key->tp.dst = dst;
-	}
+	return err;
 }
 
 /* Returns NF_DROP if the packet should be dropped, NF_ACCEPT otherwise. */
@@ -906,7 +910,7 @@ static int ovs_ct_nat(struct net *net, struct sw_flow_key *key,
 	} else {
 		return NF_ACCEPT; /* Connection is not NATed. */
 	}
-	err = ovs_ct_nat_execute(skb, ct, ctinfo, &info->range, maniptype);
+	err = ovs_ct_nat_execute(skb, ct, ctinfo, &info->range, maniptype, key);
 
 	if (err == NF_ACCEPT && ct->status & IPS_DST_NAT) {
 		if (ct->status & IPS_SRC_NAT) {
@@ -916,17 +920,13 @@ static int ovs_ct_nat(struct net *net, struct sw_flow_key *key,
 				maniptype = NF_NAT_MANIP_SRC;
 
 			err = ovs_ct_nat_execute(skb, ct, ctinfo, &info->range,
-						 maniptype);
+						 maniptype, key);
 		} else if (CTINFO2DIR(ctinfo) == IP_CT_DIR_ORIGINAL) {
 			err = ovs_ct_nat_execute(skb, ct, ctinfo, NULL,
-						 NF_NAT_MANIP_SRC);
+						 NF_NAT_MANIP_SRC, key);
 		}
 	}
 
-	/* Mark NAT done if successful and update the flow key. */
-	if (err == NF_ACCEPT)
-		ovs_nat_update_key(key, skb, maniptype);
-
 	return err;
 }
 #else /* !CONFIG_NF_NAT */
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index 67ad08320886..7e8a39a35627 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -37,6 +37,7 @@
 #include <net/genetlink.h>
 #include <net/net_namespace.h>
 #include <net/netns/generic.h>
+#include <net/pkt_cls.h>
 
 #include "datapath.h"
 #include "flow.h"
@@ -1601,8 +1602,6 @@ static void ovs_dp_reset_user_features(struct sk_buff *skb,
 	dp->user_features = 0;
 }
 
-DEFINE_STATIC_KEY_FALSE(tc_recirc_sharing_support);
-
 static int ovs_dp_set_upcall_portids(struct datapath *dp,
 			      const struct nlattr *ids)
 {
@@ -1657,7 +1656,7 @@ u32 ovs_dp_get_upcall_portid(const struct datapath *dp, uint32_t cpu_id)
 
 static int ovs_dp_change(struct datapath *dp, struct nlattr *a[])
 {
-	u32 user_features = 0;
+	u32 user_features = 0, old_features = dp->user_features;
 	int err;
 
 	if (a[OVS_DP_ATTR_USER_FEATURES]) {
@@ -1696,10 +1695,12 @@ static int ovs_dp_change(struct datapath *dp, struct nlattr *a[])
 			return err;
 	}
 
-	if (dp->user_features & OVS_DP_F_TC_RECIRC_SHARING)
-		static_branch_enable(&tc_recirc_sharing_support);
-	else
-		static_branch_disable(&tc_recirc_sharing_support);
+	if ((dp->user_features & OVS_DP_F_TC_RECIRC_SHARING) &&
+	    !(old_features & OVS_DP_F_TC_RECIRC_SHARING))
+		tc_skb_ext_tc_enable();
+	else if (!(dp->user_features & OVS_DP_F_TC_RECIRC_SHARING) &&
+		 (old_features & OVS_DP_F_TC_RECIRC_SHARING))
+		tc_skb_ext_tc_disable();
 
 	return 0;
 }
@@ -1839,6 +1840,9 @@ static void __dp_destroy(struct datapath *dp)
 	struct flow_table *table = &dp->table;
 	int i;
 
+	if (dp->user_features & OVS_DP_F_TC_RECIRC_SHARING)
+		tc_skb_ext_tc_disable();
+
 	for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
 		struct vport *vport;
 		struct hlist_node *n;
diff --git a/net/openvswitch/datapath.h b/net/openvswitch/datapath.h
index fcfe6cb46441..0cd29971a907 100644
--- a/net/openvswitch/datapath.h
+++ b/net/openvswitch/datapath.h
@@ -253,8 +253,6 @@ static inline struct datapath *get_dp(struct net *net, int dp_ifindex)
 extern struct notifier_block ovs_dp_device_notifier;
 extern struct genl_family dp_vport_genl_family;
 
-DECLARE_STATIC_KEY_FALSE(tc_recirc_sharing_support);
-
 void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key);
 void ovs_dp_detach_port(struct vport *);
 int ovs_dp_upcall(struct datapath *, struct sk_buff *,
diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c
index 02096f2ec678..372bf54a0ca9 100644
--- a/net/openvswitch/flow.c
+++ b/net/openvswitch/flow.c
@@ -34,6 +34,7 @@
 #include <net/mpls.h>
 #include <net/ndisc.h>
 #include <net/nsh.h>
+#include <net/pkt_cls.h>
 #include <net/netfilter/nf_conntrack_zones.h>
 
 #include "conntrack.h"
@@ -240,6 +241,144 @@ static bool icmphdr_ok(struct sk_buff *skb)
 				  sizeof(struct icmphdr));
 }
 
+/**
+ * get_ipv6_ext_hdrs() - Parses packet and sets IPv6 extension header flags.
+ *
+ * @skb: buffer where extension header data starts in packet
+ * @nh: ipv6 header
+ * @ext_hdrs: flags are stored here
+ *
+ * OFPIEH12_UNREP is set if more than one of a given IPv6 extension header
+ * is unexpectedly encountered. (Two destination options headers may be
+ * expected and would not cause this bit to be set.)
+ *
+ * OFPIEH12_UNSEQ is set if IPv6 extension headers were not in the order
+ * preferred (but not required) by RFC 2460:
+ *
+ * When more than one extension header is used in the same packet, it is
+ * recommended that those headers appear in the following order:
+ *      IPv6 header
+ *      Hop-by-Hop Options header
+ *      Destination Options header
+ *      Routing header
+ *      Fragment header
+ *      Authentication header
+ *      Encapsulating Security Payload header
+ *      Destination Options header
+ *      upper-layer header
+ */
+static void get_ipv6_ext_hdrs(struct sk_buff *skb, struct ipv6hdr *nh,
+			      u16 *ext_hdrs)
+{
+	u8 next_type = nh->nexthdr;
+	unsigned int start = skb_network_offset(skb) + sizeof(struct ipv6hdr);
+	int dest_options_header_count = 0;
+
+	*ext_hdrs = 0;
+
+	while (ipv6_ext_hdr(next_type)) {
+		struct ipv6_opt_hdr _hdr, *hp;
+
+		switch (next_type) {
+		case IPPROTO_NONE:
+			*ext_hdrs |= OFPIEH12_NONEXT;
+			/* stop parsing */
+			return;
+
+		case IPPROTO_ESP:
+			if (*ext_hdrs & OFPIEH12_ESP)
+				*ext_hdrs |= OFPIEH12_UNREP;
+			if ((*ext_hdrs & ~(OFPIEH12_HOP | OFPIEH12_DEST |
+					   OFPIEH12_ROUTER | IPPROTO_FRAGMENT |
+					   OFPIEH12_AUTH | OFPIEH12_UNREP)) ||
+			    dest_options_header_count >= 2) {
+				*ext_hdrs |= OFPIEH12_UNSEQ;
+			}
+			*ext_hdrs |= OFPIEH12_ESP;
+			break;
+
+		case IPPROTO_AH:
+			if (*ext_hdrs & OFPIEH12_AUTH)
+				*ext_hdrs |= OFPIEH12_UNREP;
+			if ((*ext_hdrs &
+			     ~(OFPIEH12_HOP | OFPIEH12_DEST | OFPIEH12_ROUTER |
+			       IPPROTO_FRAGMENT | OFPIEH12_UNREP)) ||
+			    dest_options_header_count >= 2) {
+				*ext_hdrs |= OFPIEH12_UNSEQ;
+			}
+			*ext_hdrs |= OFPIEH12_AUTH;
+			break;
+
+		case IPPROTO_DSTOPTS:
+			if (dest_options_header_count == 0) {
+				if (*ext_hdrs &
+				    ~(OFPIEH12_HOP | OFPIEH12_UNREP))
+					*ext_hdrs |= OFPIEH12_UNSEQ;
+				*ext_hdrs |= OFPIEH12_DEST;
+			} else if (dest_options_header_count == 1) {
+				if (*ext_hdrs &
+				    ~(OFPIEH12_HOP | OFPIEH12_DEST |
+				      OFPIEH12_ROUTER | OFPIEH12_FRAG |
+				      OFPIEH12_AUTH | OFPIEH12_ESP |
+				      OFPIEH12_UNREP)) {
+					*ext_hdrs |= OFPIEH12_UNSEQ;
+				}
+			} else {
+				*ext_hdrs |= OFPIEH12_UNREP;
+			}
+			dest_options_header_count++;
+			break;
+
+		case IPPROTO_FRAGMENT:
+			if (*ext_hdrs & OFPIEH12_FRAG)
+				*ext_hdrs |= OFPIEH12_UNREP;
+			if ((*ext_hdrs & ~(OFPIEH12_HOP |
+					   OFPIEH12_DEST |
+					   OFPIEH12_ROUTER |
+					   OFPIEH12_UNREP)) ||
+			    dest_options_header_count >= 2) {
+				*ext_hdrs |= OFPIEH12_UNSEQ;
+			}
+			*ext_hdrs |= OFPIEH12_FRAG;
+			break;
+
+		case IPPROTO_ROUTING:
+			if (*ext_hdrs & OFPIEH12_ROUTER)
+				*ext_hdrs |= OFPIEH12_UNREP;
+			if ((*ext_hdrs & ~(OFPIEH12_HOP |
+					   OFPIEH12_DEST |
+					   OFPIEH12_UNREP)) ||
+			    dest_options_header_count >= 2) {
+				*ext_hdrs |= OFPIEH12_UNSEQ;
+			}
+			*ext_hdrs |= OFPIEH12_ROUTER;
+			break;
+
+		case IPPROTO_HOPOPTS:
+			if (*ext_hdrs & OFPIEH12_HOP)
+				*ext_hdrs |= OFPIEH12_UNREP;
+			/* OFPIEH12_HOP is set to 1 if a hop-by-hop IPv6
+			 * extension header is present as the first
+			 * extension header in the packet.
+			 */
+			if (*ext_hdrs == 0)
+				*ext_hdrs |= OFPIEH12_HOP;
+			else
+				*ext_hdrs |= OFPIEH12_UNSEQ;
+			break;
+
+		default:
+			return;
+		}
+
+		hp = skb_header_pointer(skb, start, sizeof(_hdr), &_hdr);
+		if (!hp)
+			break;
+		next_type = hp->nexthdr;
+		start += ipv6_optlen(hp);
+	}
+}
+
 static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key)
 {
 	unsigned short frag_off;
@@ -255,6 +394,8 @@ static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key)
 
 	nh = ipv6_hdr(skb);
 
+	get_ipv6_ext_hdrs(skb, nh, &key->ipv6.exthdrs);
+
 	key->ip.proto = NEXTHDR_NONE;
 	key->ip.tos = ipv6_get_dsfield(nh);
 	key->ip.ttl = nh->hop_limit;
@@ -895,7 +1036,7 @@ int ovs_flow_key_extract(const struct ip_tunnel_info *tun_info,
 	key->mac_proto = res;
 
 #if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
-	if (static_branch_unlikely(&tc_recirc_sharing_support)) {
+	if (tc_skb_ext_tc_enabled()) {
 		tc_ext = skb_ext_find(skb, TC_SKB_EXT);
 		key->recirc_id = tc_ext ? tc_ext->chain : 0;
 		OVS_CB(skb)->mru = tc_ext ? tc_ext->mru : 0;
diff --git a/net/openvswitch/flow.h b/net/openvswitch/flow.h
index 758a8c77f736..073ab73ffeaa 100644
--- a/net/openvswitch/flow.h
+++ b/net/openvswitch/flow.h
@@ -32,6 +32,19 @@ enum sw_flow_mac_proto {
 #define SW_FLOW_KEY_INVALID	0x80
 #define MPLS_LABEL_DEPTH       3
 
+/* Bit definitions for IPv6 Extension Header pseudo-field. */
+enum ofp12_ipv6exthdr_flags {
+	OFPIEH12_NONEXT = 1 << 0,   /* "No next header" encountered. */
+	OFPIEH12_ESP    = 1 << 1,   /* Encrypted Sec Payload header present. */
+	OFPIEH12_AUTH   = 1 << 2,   /* Authentication header present. */
+	OFPIEH12_DEST   = 1 << 3,   /* 1 or 2 dest headers present. */
+	OFPIEH12_FRAG   = 1 << 4,   /* Fragment header present. */
+	OFPIEH12_ROUTER = 1 << 5,   /* Router header present. */
+	OFPIEH12_HOP    = 1 << 6,   /* Hop-by-hop header present. */
+	OFPIEH12_UNREP  = 1 << 7,   /* Unexpected repeats encountered. */
+	OFPIEH12_UNSEQ  = 1 << 8    /* Unexpected sequencing encountered. */
+};
+
 /* Store options at the end of the array if they are less than the
  * maximum size. This allows us to get the benefits of variable length
  * matching for small options.
@@ -121,6 +134,7 @@ struct sw_flow_key {
 				struct in6_addr dst;	/* IPv6 destination address. */
 			} addr;
 			__be32 label;			/* IPv6 flow label. */
+			u16 exthdrs;	/* IPv6 extension header flags */
 			union {
 				struct {
 					struct in6_addr src;
diff --git a/net/openvswitch/flow_netlink.c b/net/openvswitch/flow_netlink.c
index fd1f809e9bc1..5176f6ccac8e 100644
--- a/net/openvswitch/flow_netlink.c
+++ b/net/openvswitch/flow_netlink.c
@@ -346,7 +346,7 @@ size_t ovs_key_attr_size(void)
 	/* Whenever adding new OVS_KEY_ FIELDS, we should consider
 	 * updating this function.
 	 */
-	BUILD_BUG_ON(OVS_KEY_ATTR_TUNNEL_INFO != 29);
+	BUILD_BUG_ON(OVS_KEY_ATTR_MAX != 32);
 
 	return    nla_total_size(4)   /* OVS_KEY_ATTR_PRIORITY */
 		+ nla_total_size(0)   /* OVS_KEY_ATTR_TUNNEL */
@@ -369,7 +369,8 @@ size_t ovs_key_attr_size(void)
 		+ nla_total_size(2)   /* OVS_KEY_ATTR_ETHERTYPE */
 		+ nla_total_size(40)  /* OVS_KEY_ATTR_IPV6 */
 		+ nla_total_size(2)   /* OVS_KEY_ATTR_ICMPV6 */
-		+ nla_total_size(28); /* OVS_KEY_ATTR_ND */
+		+ nla_total_size(28)  /* OVS_KEY_ATTR_ND */
+		+ nla_total_size(2);  /* OVS_KEY_ATTR_IPV6_EXTHDRS */
 }
 
 static const struct ovs_len_tbl ovs_vxlan_ext_key_lens[OVS_VXLAN_EXT_MAX + 1] = {
@@ -437,6 +438,8 @@ static const struct ovs_len_tbl ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = {
 		.len = sizeof(struct ovs_key_ct_tuple_ipv6) },
 	[OVS_KEY_ATTR_NSH]       = { .len = OVS_ATTR_NESTED,
 				     .next = ovs_nsh_key_attr_lens, },
+	[OVS_KEY_ATTR_IPV6_EXTHDRS] = {
+		.len = sizeof(struct ovs_key_ipv6_exthdrs) },
 };
 
 static bool check_attr_len(unsigned int attr_len, unsigned int expected_len)
@@ -479,7 +482,14 @@ static int __parse_flow_nlattrs(const struct nlattr *attr,
 			return -EINVAL;
 		}
 
-		if (attrs & (1 << type)) {
+		if (type == OVS_KEY_ATTR_PACKET_TYPE ||
+		    type == OVS_KEY_ATTR_ND_EXTENSIONS ||
+		    type == OVS_KEY_ATTR_TUNNEL_INFO) {
+			OVS_NLERR(log, "Key type %d is not supported", type);
+			return -EINVAL;
+		}
+
+		if (attrs & (1ULL << type)) {
 			OVS_NLERR(log, "Duplicate key (type %d).", type);
 			return -EINVAL;
 		}
@@ -492,7 +502,7 @@ static int __parse_flow_nlattrs(const struct nlattr *attr,
 		}
 
 		if (!nz || !is_all_zero(nla_data(nla), nla_len(nla))) {
-			attrs |= 1 << type;
+			attrs |= 1ULL << type;
 			a[type] = nla;
 		}
 	}
@@ -1597,6 +1607,17 @@ static int ovs_key_from_nlattrs(struct net *net, struct sw_flow_match *match,
 		attrs &= ~(1 << OVS_KEY_ATTR_IPV6);
 	}
 
+	if (attrs & (1ULL << OVS_KEY_ATTR_IPV6_EXTHDRS)) {
+		const struct ovs_key_ipv6_exthdrs *ipv6_exthdrs_key;
+
+		ipv6_exthdrs_key = nla_data(a[OVS_KEY_ATTR_IPV6_EXTHDRS]);
+
+		SW_FLOW_KEY_PUT(match, ipv6.exthdrs,
+				ipv6_exthdrs_key->hdrs, is_mask);
+
+		attrs &= ~(1ULL << OVS_KEY_ATTR_IPV6_EXTHDRS);
+	}
+
 	if (attrs & (1 << OVS_KEY_ATTR_ARP)) {
 		const struct ovs_key_arp *arp_key;
 
@@ -2099,6 +2120,7 @@ static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
 		ipv4_key->ipv4_frag = output->ip.frag;
 	} else if (swkey->eth.type == htons(ETH_P_IPV6)) {
 		struct ovs_key_ipv6 *ipv6_key;
+		struct ovs_key_ipv6_exthdrs *ipv6_exthdrs_key;
 
 		nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key));
 		if (!nla)
@@ -2113,6 +2135,13 @@ static int __ovs_nla_put_key(const struct sw_flow_key *swkey,
 		ipv6_key->ipv6_tclass = output->ip.tos;
 		ipv6_key->ipv6_hlimit = output->ip.ttl;
 		ipv6_key->ipv6_frag = output->ip.frag;
+
+		nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6_EXTHDRS,
+				  sizeof(*ipv6_exthdrs_key));
+		if (!nla)
+			goto nla_put_failure;
+		ipv6_exthdrs_key = nla_data(nla);
+		ipv6_exthdrs_key->hdrs = output->ipv6.exthdrs;
 	} else if (swkey->eth.type == htons(ETH_P_NSH)) {
 		if (nsh_key_to_nlattr(&output->nsh, is_mask, skb))
 			goto nla_put_failure;
diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c
index cf2ce5812489..82a74f998966 100644
--- a/net/openvswitch/vport.c
+++ b/net/openvswitch/vport.c
@@ -507,7 +507,7 @@ void ovs_vport_send(struct vport *vport, struct sk_buff *skb, u8 mac_proto)
 	}
 
 	skb->dev = vport->dev;
-	skb->tstamp = 0;
+	skb_clear_tstamp(skb);
 	vport->ops->send(skb);
 	return;
 
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index a7273af2d900..c39c09899fd0 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -460,7 +460,7 @@ static __u32 tpacket_get_timestamp(struct sk_buff *skb, struct timespec64 *ts,
 		return TP_STATUS_TS_RAW_HARDWARE;
 
 	if ((flags & SOF_TIMESTAMPING_SOFTWARE) &&
-	    ktime_to_timespec64_cond(skb->tstamp, ts))
+	    ktime_to_timespec64_cond(skb_tstamp(skb), ts))
 		return TP_STATUS_TS_SOFTWARE;
 
 	return 0;
@@ -2199,6 +2199,7 @@ static int packet_rcv(struct sk_buff *skb, struct net_device *dev,
 	spin_lock(&sk->sk_receive_queue.lock);
 	po->stats.stats1.tp_packets++;
 	sock_skb_set_dropcount(sk, skb);
+	skb_clear_delivery_time(skb);
 	__skb_queue_tail(&sk->sk_receive_queue, skb);
 	spin_unlock(&sk->sk_receive_queue.lock);
 	sk->sk_data_ready(sk);
@@ -2380,6 +2381,7 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev,
 	po->stats.stats1.tp_packets++;
 	if (copy_skb) {
 		status |= TP_STATUS_COPY;
+		skb_clear_delivery_time(copy_skb);
 		__skb_queue_tail(&sk->sk_receive_queue, copy_skb);
 	}
 	spin_unlock(&sk->sk_receive_queue.lock);
diff --git a/net/phonet/af_phonet.c b/net/phonet/af_phonet.c
index 65218b7ce9f9..2b582da1e88c 100644
--- a/net/phonet/af_phonet.c
+++ b/net/phonet/af_phonet.c
@@ -146,7 +146,7 @@ EXPORT_SYMBOL(phonet_header_ops);
  * Prepends an ISI header and sends a datagram.
  */
 static int pn_send(struct sk_buff *skb, struct net_device *dev,
-			u16 dst, u16 src, u8 res, u8 irq)
+			u16 dst, u16 src, u8 res)
 {
 	struct phonethdr *ph;
 	int err;
@@ -182,7 +182,7 @@ static int pn_send(struct sk_buff *skb, struct net_device *dev,
 	if (skb->pkt_type == PACKET_LOOPBACK) {
 		skb_reset_mac_header(skb);
 		skb_orphan(skb);
-		err = (irq ? netif_rx(skb) : netif_rx_ni(skb)) ? -ENOBUFS : 0;
+		err = netif_rx(skb) ? -ENOBUFS : 0;
 	} else {
 		err = dev_hard_header(skb, dev, ntohs(skb->protocol),
 					NULL, NULL, skb->len);
@@ -214,7 +214,7 @@ static int pn_raw_send(const void *data, int len, struct net_device *dev,
 	skb_reserve(skb, MAX_PHONET_HEADER);
 	__skb_put(skb, len);
 	skb_copy_to_linear_data(skb, data, len);
-	return pn_send(skb, dev, dst, src, res, 1);
+	return pn_send(skb, dev, dst, src, res);
 }
 
 /*
@@ -269,7 +269,7 @@ int pn_skb_send(struct sock *sk, struct sk_buff *skb,
 	if (!pn_addr(src))
 		src = pn_object(saddr, pn_obj(src));
 
-	err = pn_send(skb, dev, dst, src, res, 0);
+	err = pn_send(skb, dev, dst, src, res);
 	dev_put(dev);
 	return err;
 
diff --git a/net/rfkill/core.c b/net/rfkill/core.c
index 5b1927d66f0d..dac4fdc7488a 100644
--- a/net/rfkill/core.c
+++ b/net/rfkill/core.c
@@ -78,6 +78,7 @@ struct rfkill_data {
 	struct mutex		mtx;
 	wait_queue_head_t	read_wait;
 	bool			input_handler;
+	u8			max_size;
 };
 
 
@@ -1153,6 +1154,8 @@ static int rfkill_fop_open(struct inode *inode, struct file *file)
 	if (!data)
 		return -ENOMEM;
 
+	data->max_size = RFKILL_EVENT_SIZE_V1;
+
 	INIT_LIST_HEAD(&data->events);
 	mutex_init(&data->mtx);
 	init_waitqueue_head(&data->read_wait);
@@ -1235,6 +1238,7 @@ static ssize_t rfkill_fop_read(struct file *file, char __user *buf,
 				list);
 
 	sz = min_t(unsigned long, sizeof(ev->ev), count);
+	sz = min_t(unsigned long, sz, data->max_size);
 	ret = sz;
 	if (copy_to_user(buf, &ev->ev, sz))
 		ret = -EFAULT;
@@ -1249,6 +1253,7 @@ static ssize_t rfkill_fop_read(struct file *file, char __user *buf,
 static ssize_t rfkill_fop_write(struct file *file, const char __user *buf,
 				size_t count, loff_t *pos)
 {
+	struct rfkill_data *data = file->private_data;
 	struct rfkill *rfkill;
 	struct rfkill_event_ext ev;
 	int ret;
@@ -1263,6 +1268,7 @@ static ssize_t rfkill_fop_write(struct file *file, const char __user *buf,
 	 * our API version even in a write() call, if it cares.
 	 */
 	count = min(count, sizeof(ev));
+	count = min_t(size_t, count, data->max_size);
 	if (copy_from_user(&ev, buf, count))
 		return -EFAULT;
 
@@ -1322,31 +1328,47 @@ static int rfkill_fop_release(struct inode *inode, struct file *file)
 	return 0;
 }
 
-#ifdef CONFIG_RFKILL_INPUT
 static long rfkill_fop_ioctl(struct file *file, unsigned int cmd,
 			     unsigned long arg)
 {
 	struct rfkill_data *data = file->private_data;
+	int ret = -ENOSYS;
+	u32 size;
 
 	if (_IOC_TYPE(cmd) != RFKILL_IOC_MAGIC)
 		return -ENOSYS;
 
-	if (_IOC_NR(cmd) != RFKILL_IOC_NOINPUT)
-		return -ENOSYS;
-
 	mutex_lock(&data->mtx);
-
-	if (!data->input_handler) {
-		if (atomic_inc_return(&rfkill_input_disabled) == 1)
-			printk(KERN_DEBUG "rfkill: input handler disabled\n");
-		data->input_handler = true;
+	switch (_IOC_NR(cmd)) {
+#ifdef CONFIG_RFKILL_INPUT
+	case RFKILL_IOC_NOINPUT:
+		if (!data->input_handler) {
+			if (atomic_inc_return(&rfkill_input_disabled) == 1)
+				printk(KERN_DEBUG "rfkill: input handler disabled\n");
+			data->input_handler = true;
+		}
+		ret = 0;
+		break;
+#endif
+	case RFKILL_IOC_MAX_SIZE:
+		if (get_user(size, (__u32 __user *)arg)) {
+			ret = -EFAULT;
+			break;
+		}
+		if (size < RFKILL_EVENT_SIZE_V1 || size > U8_MAX) {
+			ret = -EINVAL;
+			break;
+		}
+		data->max_size = size;
+		ret = 0;
+		break;
+	default:
+		break;
 	}
-
 	mutex_unlock(&data->mtx);
 
-	return 0;
+	return ret;
 }
-#endif
 
 static const struct file_operations rfkill_fops = {
 	.owner		= THIS_MODULE,
@@ -1355,10 +1377,8 @@ static const struct file_operations rfkill_fops = {
 	.write		= rfkill_fop_write,
 	.poll		= rfkill_fop_poll,
 	.release	= rfkill_fop_release,
-#ifdef CONFIG_RFKILL_INPUT
 	.unlocked_ioctl	= rfkill_fop_ioctl,
 	.compat_ioctl	= compat_ptr_ioctl,
-#endif
 	.llseek		= no_llseek,
 };
 
diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index ca03e7284254..4f51094da9da 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -1446,6 +1446,8 @@ int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
 				continue;
 			if (skip_sw != tc_act_skip_sw(act->tcfa_flags) ||
 			    skip_hw != tc_act_skip_hw(act->tcfa_flags)) {
+				NL_SET_ERR_MSG(extack,
+					       "Mismatch between action and filter offload flags");
 				err = -EINVAL;
 				goto err;
 			}
diff --git a/net/sched/act_bpf.c b/net/sched/act_bpf.c
index a77d8908e737..fea2d78b9ddc 100644
--- a/net/sched/act_bpf.c
+++ b/net/sched/act_bpf.c
@@ -53,6 +53,8 @@ static int tcf_bpf_act(struct sk_buff *skb, const struct tc_action *act,
 		bpf_compute_data_pointers(skb);
 		filter_res = bpf_prog_run(filter, skb);
 	}
+	if (unlikely(!skb->tstamp && skb->mono_delivery_time))
+		skb->mono_delivery_time = 0;
 	if (skb_sk_is_prefetched(skb) && filter_res != TC_ACT_OK)
 		skb_orphan(skb);
 
diff --git a/net/sched/act_ct.c b/net/sched/act_ct.c
index ec19f625863a..6a34f7b80a6d 100644
--- a/net/sched/act_ct.c
+++ b/net/sched/act_ct.c
@@ -57,12 +57,6 @@ static const struct rhashtable_params zones_params = {
 	.automatic_shrinking = true,
 };
 
-static struct nf_ct_ext_type act_ct_extend __read_mostly = {
-	.len		= sizeof(struct nf_conn_act_ct_ext),
-	.align		= __alignof__(struct nf_conn_act_ct_ext),
-	.id		= NF_CT_EXT_ACT_CT,
-};
-
 static struct flow_action_entry *
 tcf_ct_flow_table_flow_action_get_next(struct flow_action *flow_action)
 {
@@ -426,6 +420,19 @@ static void tcf_ct_flow_table_process_conn(struct tcf_ct_flow_table *ct_ft,
 		break;
 	case IPPROTO_UDP:
 		break;
+#ifdef CONFIG_NF_CT_PROTO_GRE
+	case IPPROTO_GRE: {
+		struct nf_conntrack_tuple *tuple;
+
+		if (ct->status & IPS_NAT_MASK)
+			return;
+		tuple = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple;
+		/* No support for GRE v1 */
+		if (tuple->src.u.gre.key || tuple->dst.u.gre.key)
+			return;
+		break;
+	}
+#endif
 	default:
 		return;
 	}
@@ -445,6 +452,8 @@ tcf_ct_flow_table_fill_tuple_ipv4(struct sk_buff *skb,
 	struct flow_ports *ports;
 	unsigned int thoff;
 	struct iphdr *iph;
+	size_t hdrsize;
+	u8 ipproto;
 
 	if (!pskb_network_may_pull(skb, sizeof(*iph)))
 		return false;
@@ -456,29 +465,54 @@ tcf_ct_flow_table_fill_tuple_ipv4(struct sk_buff *skb,
 	    unlikely(thoff != sizeof(struct iphdr)))
 		return false;
 
-	if (iph->protocol != IPPROTO_TCP &&
-	    iph->protocol != IPPROTO_UDP)
+	ipproto = iph->protocol;
+	switch (ipproto) {
+	case IPPROTO_TCP:
+		hdrsize = sizeof(struct tcphdr);
+		break;
+	case IPPROTO_UDP:
+		hdrsize = sizeof(*ports);
+		break;
+#ifdef CONFIG_NF_CT_PROTO_GRE
+	case IPPROTO_GRE:
+		hdrsize = sizeof(struct gre_base_hdr);
+		break;
+#endif
+	default:
 		return false;
+	}
 
 	if (iph->ttl <= 1)
 		return false;
 
-	if (!pskb_network_may_pull(skb, iph->protocol == IPPROTO_TCP ?
-					thoff + sizeof(struct tcphdr) :
-					thoff + sizeof(*ports)))
+	if (!pskb_network_may_pull(skb, thoff + hdrsize))
 		return false;
 
-	iph = ip_hdr(skb);
-	if (iph->protocol == IPPROTO_TCP)
+	switch (ipproto) {
+	case IPPROTO_TCP:
 		*tcph = (void *)(skb_network_header(skb) + thoff);
+		fallthrough;
+	case IPPROTO_UDP:
+		ports = (struct flow_ports *)(skb_network_header(skb) + thoff);
+		tuple->src_port = ports->source;
+		tuple->dst_port = ports->dest;
+		break;
+	case IPPROTO_GRE: {
+		struct gre_base_hdr *greh;
+
+		greh = (struct gre_base_hdr *)(skb_network_header(skb) + thoff);
+		if ((greh->flags & GRE_VERSION) != GRE_VERSION_0)
+			return false;
+		break;
+	}
+	}
+
+	iph = ip_hdr(skb);
 
-	ports = (struct flow_ports *)(skb_network_header(skb) + thoff);
 	tuple->src_v4.s_addr = iph->saddr;
 	tuple->dst_v4.s_addr = iph->daddr;
-	tuple->src_port = ports->source;
-	tuple->dst_port = ports->dest;
 	tuple->l3proto = AF_INET;
-	tuple->l4proto = iph->protocol;
+	tuple->l4proto = ipproto;
 
 	return true;
 }
@@ -491,36 +525,63 @@ tcf_ct_flow_table_fill_tuple_ipv6(struct sk_buff *skb,
 	struct flow_ports *ports;
 	struct ipv6hdr *ip6h;
 	unsigned int thoff;
+	size_t hdrsize;
+	u8 nexthdr;
 
 	if (!pskb_network_may_pull(skb, sizeof(*ip6h)))
 		return false;
 
 	ip6h = ipv6_hdr(skb);
+	thoff = sizeof(*ip6h);
 
-	if (ip6h->nexthdr != IPPROTO_TCP &&
-	    ip6h->nexthdr != IPPROTO_UDP)
-		return false;
+	nexthdr = ip6h->nexthdr;
+	switch (nexthdr) {
+	case IPPROTO_TCP:
+		hdrsize = sizeof(struct tcphdr);
+		break;
+	case IPPROTO_UDP:
+		hdrsize = sizeof(*ports);
+		break;
+#ifdef CONFIG_NF_CT_PROTO_GRE
+	case IPPROTO_GRE:
+		hdrsize = sizeof(struct gre_base_hdr);
+		break;
+#endif
+	default:
+		return -1;
+	}
 
 	if (ip6h->hop_limit <= 1)
 		return false;
 
-	thoff = sizeof(*ip6h);
-	if (!pskb_network_may_pull(skb, ip6h->nexthdr == IPPROTO_TCP ?
-					thoff + sizeof(struct tcphdr) :
-					thoff + sizeof(*ports)))
+	if (!pskb_network_may_pull(skb, thoff + hdrsize))
 		return false;
 
-	ip6h = ipv6_hdr(skb);
-	if (ip6h->nexthdr == IPPROTO_TCP)
+	switch (nexthdr) {
+	case IPPROTO_TCP:
 		*tcph = (void *)(skb_network_header(skb) + thoff);
+		fallthrough;
+	case IPPROTO_UDP:
+		ports = (struct flow_ports *)(skb_network_header(skb) + thoff);
+		tuple->src_port = ports->source;
+		tuple->dst_port = ports->dest;
+		break;
+	case IPPROTO_GRE: {
+		struct gre_base_hdr *greh;
+
+		greh = (struct gre_base_hdr *)(skb_network_header(skb) + thoff);
+		if ((greh->flags & GRE_VERSION) != GRE_VERSION_0)
+			return false;
+		break;
+	}
+	}
+
+	ip6h = ipv6_hdr(skb);
 
-	ports = (struct flow_ports *)(skb_network_header(skb) + thoff);
 	tuple->src_v6 = ip6h->saddr;
 	tuple->dst_v6 = ip6h->daddr;
-	tuple->src_port = ports->source;
-	tuple->dst_port = ports->dest;
 	tuple->l3proto = AF_INET6;
-	tuple->l4proto = ip6h->nexthdr;
+	tuple->l4proto = nexthdr;
 
 	return true;
 }
@@ -1608,16 +1669,10 @@ static int __init ct_init_module(void)
 	if (err)
 		goto err_register;
 
-	err = nf_ct_extend_register(&act_ct_extend);
-	if (err)
-		goto err_register_extend;
-
 	static_branch_inc(&tcf_frag_xmit_count);
 
 	return 0;
 
-err_register_extend:
-	tcf_unregister_action(&act_ct_ops, &ct_net_ops);
 err_register:
 	tcf_ct_flow_tables_uninit();
 err_tbl_init:
@@ -1628,7 +1683,6 @@ err_tbl_init:
 static void __exit ct_cleanup_module(void)
 {
 	static_branch_dec(&tcf_frag_xmit_count);
-	nf_ct_extend_unregister(&act_ct_extend);
 	tcf_unregister_action(&act_ct_ops, &ct_net_ops);
 	tcf_ct_flow_tables_uninit();
 	destroy_workqueue(act_ct_wq);
diff --git a/net/sched/act_police.c b/net/sched/act_police.c
index 0923aa2b8f8a..f4d917705263 100644
--- a/net/sched/act_police.c
+++ b/net/sched/act_police.c
@@ -239,6 +239,20 @@ release_idr:
 	return err;
 }
 
+static bool tcf_police_mtu_check(struct sk_buff *skb, u32 limit)
+{
+	u32 len;
+
+	if (skb_is_gso(skb))
+		return skb_gso_validate_mac_len(skb, limit);
+
+	len = qdisc_pkt_len(skb);
+	if (skb_at_tc_ingress(skb))
+		len += skb->mac_len;
+
+	return len <= limit;
+}
+
 static int tcf_police_act(struct sk_buff *skb, const struct tc_action *a,
 			  struct tcf_result *res)
 {
@@ -261,7 +275,7 @@ static int tcf_police_act(struct sk_buff *skb, const struct tc_action *a,
 			goto inc_overlimits;
 	}
 
-	if (qdisc_pkt_len(skb) <= p->tcfp_mtu) {
+	if (tcf_police_mtu_check(skb, p->tcfp_mtu)) {
 		if (!p->rate_present && !p->pps_present) {
 			ret = p->tcfp_result;
 			goto end;
@@ -405,20 +419,66 @@ static int tcf_police_search(struct net *net, struct tc_action **a, u32 index)
 	return tcf_idr_search(tn, a, index);
 }
 
+static int tcf_police_act_to_flow_act(int tc_act, u32 *extval)
+{
+	int act_id = -EOPNOTSUPP;
+
+	if (!TC_ACT_EXT_OPCODE(tc_act)) {
+		if (tc_act == TC_ACT_OK)
+			act_id = FLOW_ACTION_ACCEPT;
+		else if (tc_act ==  TC_ACT_SHOT)
+			act_id = FLOW_ACTION_DROP;
+		else if (tc_act == TC_ACT_PIPE)
+			act_id = FLOW_ACTION_PIPE;
+	} else if (TC_ACT_EXT_CMP(tc_act, TC_ACT_GOTO_CHAIN)) {
+		act_id = FLOW_ACTION_GOTO;
+		*extval = tc_act & TC_ACT_EXT_VAL_MASK;
+	} else if (TC_ACT_EXT_CMP(tc_act, TC_ACT_JUMP)) {
+		act_id = FLOW_ACTION_JUMP;
+		*extval = tc_act & TC_ACT_EXT_VAL_MASK;
+	}
+
+	return act_id;
+}
+
 static int tcf_police_offload_act_setup(struct tc_action *act, void *entry_data,
 					u32 *index_inc, bool bind)
 {
 	if (bind) {
 		struct flow_action_entry *entry = entry_data;
+		struct tcf_police *police = to_police(act);
+		struct tcf_police_params *p;
+		int act_id;
+
+		p = rcu_dereference_protected(police->params,
+					      lockdep_is_held(&police->tcf_lock));
 
 		entry->id = FLOW_ACTION_POLICE;
 		entry->police.burst = tcf_police_burst(act);
 		entry->police.rate_bytes_ps =
 			tcf_police_rate_bytes_ps(act);
+		entry->police.peakrate_bytes_ps = tcf_police_peakrate_bytes_ps(act);
+		entry->police.avrate = tcf_police_tcfp_ewma_rate(act);
+		entry->police.overhead = tcf_police_rate_overhead(act);
 		entry->police.burst_pkt = tcf_police_burst_pkt(act);
 		entry->police.rate_pkt_ps =
 			tcf_police_rate_pkt_ps(act);
 		entry->police.mtu = tcf_police_tcfp_mtu(act);
+
+		act_id = tcf_police_act_to_flow_act(police->tcf_action,
+						    &entry->police.exceed.extval);
+		if (act_id < 0)
+			return act_id;
+
+		entry->police.exceed.act_id = act_id;
+
+		act_id = tcf_police_act_to_flow_act(p->tcfp_result,
+						    &entry->police.notexceed.extval);
+		if (act_id < 0)
+			return act_id;
+
+		entry->police.notexceed.act_id = act_id;
+
 		*index_inc = 1;
 	} else {
 		struct flow_offload_action *fl_action = entry_data;
diff --git a/net/sched/act_vlan.c b/net/sched/act_vlan.c
index 756e2dcde1cd..883454c4f921 100644
--- a/net/sched/act_vlan.c
+++ b/net/sched/act_vlan.c
@@ -390,6 +390,13 @@ static int tcf_vlan_offload_act_setup(struct tc_action *act, void *entry_data,
 			entry->vlan.proto = tcf_vlan_push_proto(act);
 			entry->vlan.prio = tcf_vlan_push_prio(act);
 			break;
+		case TCA_VLAN_ACT_POP_ETH:
+			entry->id = FLOW_ACTION_VLAN_POP_ETH;
+			break;
+		case TCA_VLAN_ACT_PUSH_ETH:
+			entry->id = FLOW_ACTION_VLAN_PUSH_ETH;
+			tcf_vlan_push_eth(entry->vlan_push_eth.src, entry->vlan_push_eth.dst, act);
+			break;
 		default:
 			return -EOPNOTSUPP;
 		}
@@ -407,6 +414,12 @@ static int tcf_vlan_offload_act_setup(struct tc_action *act, void *entry_data,
 		case TCA_VLAN_ACT_MODIFY:
 			fl_action->id = FLOW_ACTION_VLAN_MANGLE;
 			break;
+		case TCA_VLAN_ACT_POP_ETH:
+			fl_action->id = FLOW_ACTION_VLAN_POP_ETH;
+			break;
+		case TCA_VLAN_ACT_PUSH_ETH:
+			fl_action->id = FLOW_ACTION_VLAN_PUSH_ETH;
+			break;
 		default:
 			return -EOPNOTSUPP;
 		}
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 5ce1208a6ea3..2957f8f5cea7 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -49,6 +49,23 @@ static LIST_HEAD(tcf_proto_base);
 /* Protects list of registered TC modules. It is pure SMP lock. */
 static DEFINE_RWLOCK(cls_mod_lock);
 
+#ifdef CONFIG_NET_CLS_ACT
+DEFINE_STATIC_KEY_FALSE(tc_skb_ext_tc);
+EXPORT_SYMBOL(tc_skb_ext_tc);
+
+void tc_skb_ext_tc_enable(void)
+{
+	static_branch_inc(&tc_skb_ext_tc);
+}
+EXPORT_SYMBOL(tc_skb_ext_tc_enable);
+
+void tc_skb_ext_tc_disable(void)
+{
+	static_branch_dec(&tc_skb_ext_tc);
+}
+EXPORT_SYMBOL(tc_skb_ext_tc_disable);
+#endif
+
 static u32 destroy_obj_hashfn(const struct tcf_proto *tp)
 {
 	return jhash_3words(tp->chain->index, tp->prio,
@@ -1615,19 +1632,21 @@ int tcf_classify(struct sk_buff *skb,
 	ret = __tcf_classify(skb, tp, orig_tp, res, compat_mode,
 			     &last_executed_chain);
 
-	/* If we missed on some chain */
-	if (ret == TC_ACT_UNSPEC && last_executed_chain) {
-		struct tc_skb_cb *cb = tc_skb_cb(skb);
-
-		ext = tc_skb_ext_alloc(skb);
-		if (WARN_ON_ONCE(!ext))
-			return TC_ACT_SHOT;
-		ext->chain = last_executed_chain;
-		ext->mru = cb->mru;
-		ext->post_ct = cb->post_ct;
-		ext->post_ct_snat = cb->post_ct_snat;
-		ext->post_ct_dnat = cb->post_ct_dnat;
-		ext->zone = cb->zone;
+	if (tc_skb_ext_tc_enabled()) {
+		/* If we missed on some chain */
+		if (ret == TC_ACT_UNSPEC && last_executed_chain) {
+			struct tc_skb_cb *cb = tc_skb_cb(skb);
+
+			ext = tc_skb_ext_alloc(skb);
+			if (WARN_ON_ONCE(!ext))
+				return TC_ACT_SHOT;
+			ext->chain = last_executed_chain;
+			ext->mru = cb->mru;
+			ext->post_ct = cb->post_ct;
+			ext->post_ct_snat = cb->post_ct_snat;
+			ext->post_ct_dnat = cb->post_ct_dnat;
+			ext->zone = cb->zone;
+		}
 	}
 
 	return ret;
diff --git a/net/sched/cls_bpf.c b/net/sched/cls_bpf.c
index df19a847829e..c85b85a192bf 100644
--- a/net/sched/cls_bpf.c
+++ b/net/sched/cls_bpf.c
@@ -102,6 +102,8 @@ static int cls_bpf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
 			bpf_compute_data_pointers(skb);
 			filter_res = bpf_prog_run(prog->filter, skb);
 		}
+		if (unlikely(!skb->tstamp && skb->mono_delivery_time))
+			skb->mono_delivery_time = 0;
 
 		if (prog->exts_integrated) {
 			res->class   = 0;
diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index 1a9b1f140f9e..c80fc49c0da1 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -25,6 +25,7 @@
 #include <net/geneve.h>
 #include <net/vxlan.h>
 #include <net/erspan.h>
+#include <net/gtp.h>
 
 #include <net/dst.h>
 #include <net/dst_metadata.h>
@@ -723,6 +724,7 @@ enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = {
 	[TCA_FLOWER_KEY_ENC_OPTS_GENEVE]        = { .type = NLA_NESTED },
 	[TCA_FLOWER_KEY_ENC_OPTS_VXLAN]         = { .type = NLA_NESTED },
 	[TCA_FLOWER_KEY_ENC_OPTS_ERSPAN]        = { .type = NLA_NESTED },
+	[TCA_FLOWER_KEY_ENC_OPTS_GTP]		= { .type = NLA_NESTED },
 };
 
 static const struct nla_policy
@@ -747,6 +749,12 @@ erspan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1] = {
 };
 
 static const struct nla_policy
+gtp_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1] = {
+	[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]	   = { .type = NLA_U8 },
+	[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]	   = { .type = NLA_U8 },
+};
+
+static const struct nla_policy
 mpls_stack_entry_policy[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1] = {
 	[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]    = { .type = NLA_U8 },
 	[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]      = { .type = NLA_U8 },
@@ -1262,6 +1270,49 @@ static int fl_set_erspan_opt(const struct nlattr *nla, struct fl_flow_key *key,
 	return sizeof(*md);
 }
 
+static int fl_set_gtp_opt(const struct nlattr *nla, struct fl_flow_key *key,
+			  int depth, int option_len,
+			  struct netlink_ext_ack *extack)
+{
+	struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1];
+	struct gtp_pdu_session_info *sinfo;
+	u8 len = key->enc_opts.len;
+	int err;
+
+	sinfo = (struct gtp_pdu_session_info *)&key->enc_opts.data[len];
+	memset(sinfo, 0xff, option_len);
+
+	if (!depth)
+		return sizeof(*sinfo);
+
+	if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GTP) {
+		NL_SET_ERR_MSG_MOD(extack, "Non-gtp option type for mask");
+		return -EINVAL;
+	}
+
+	err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GTP_MAX, nla,
+			       gtp_opt_policy, extack);
+	if (err < 0)
+		return err;
+
+	if (!option_len &&
+	    (!tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] ||
+	     !tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI])) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Missing tunnel key gtp option pdu type or qfi");
+		return -EINVAL;
+	}
+
+	if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE])
+		sinfo->pdu_type =
+			nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]);
+
+	if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI])
+		sinfo->qfi = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]);
+
+	return sizeof(*sinfo);
+}
+
 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key,
 			  struct fl_flow_key *mask,
 			  struct netlink_ext_ack *extack)
@@ -1386,6 +1437,38 @@ static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key,
 				return -EINVAL;
 			}
 			break;
+		case TCA_FLOWER_KEY_ENC_OPTS_GTP:
+			if (key->enc_opts.dst_opt_type) {
+				NL_SET_ERR_MSG_MOD(extack,
+						   "Duplicate type for gtp options");
+				return -EINVAL;
+			}
+			option_len = 0;
+			key->enc_opts.dst_opt_type = TUNNEL_GTP_OPT;
+			option_len = fl_set_gtp_opt(nla_opt_key, key,
+						    key_depth, option_len,
+						    extack);
+			if (option_len < 0)
+				return option_len;
+
+			key->enc_opts.len += option_len;
+			/* At the same time we need to parse through the mask
+			 * in order to verify exact and mask attribute lengths.
+			 */
+			mask->enc_opts.dst_opt_type = TUNNEL_GTP_OPT;
+			option_len = fl_set_gtp_opt(nla_opt_msk, mask,
+						    msk_depth, option_len,
+						    extack);
+			if (option_len < 0)
+				return option_len;
+
+			mask->enc_opts.len += option_len;
+			if (key->enc_opts.len != mask->enc_opts.len) {
+				NL_SET_ERR_MSG_MOD(extack,
+						   "Key and mask miss aligned");
+				return -EINVAL;
+			}
+			break;
 		default:
 			NL_SET_ERR_MSG(extack, "Unknown tunnel option type");
 			return -EINVAL;
@@ -2761,6 +2844,34 @@ nla_put_failure:
 	return -EMSGSIZE;
 }
 
+static int fl_dump_key_gtp_opt(struct sk_buff *skb,
+			       struct flow_dissector_key_enc_opts *enc_opts)
+
+{
+	struct gtp_pdu_session_info *session_info;
+	struct nlattr *nest;
+
+	nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GTP);
+	if (!nest)
+		goto nla_put_failure;
+
+	session_info = (struct gtp_pdu_session_info *)&enc_opts->data[0];
+
+	if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE,
+		       session_info->pdu_type))
+		goto nla_put_failure;
+
+	if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_QFI, session_info->qfi))
+		goto nla_put_failure;
+
+	nla_nest_end(skb, nest);
+	return 0;
+
+nla_put_failure:
+	nla_nest_cancel(skb, nest);
+	return -EMSGSIZE;
+}
+
 static int fl_dump_key_ct(struct sk_buff *skb,
 			  struct flow_dissector_key_ct *key,
 			  struct flow_dissector_key_ct *mask)
@@ -2824,6 +2935,11 @@ static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type,
 		if (err)
 			goto nla_put_failure;
 		break;
+	case TUNNEL_GTP_OPT:
+		err = fl_dump_key_gtp_opt(skb, enc_opts);
+		if (err)
+			goto nla_put_failure;
+		break;
 	default:
 		goto nla_put_failure;
 	}
diff --git a/net/smc/Makefile b/net/smc/Makefile
index 196fb6f01b14..875efcd126a2 100644
--- a/net/smc/Makefile
+++ b/net/smc/Makefile
@@ -5,3 +5,4 @@ obj-$(CONFIG_SMC_DIAG)	+= smc_diag.o
 smc-y := af_smc.o smc_pnet.o smc_ib.o smc_clc.o smc_core.o smc_wr.o smc_llc.o
 smc-y += smc_cdc.o smc_tx.o smc_rx.o smc_close.o smc_ism.o smc_netlink.o smc_stats.o
 smc-y += smc_tracepoint.o
+smc-$(CONFIG_SYSCTL) += smc_sysctl.o
diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index 284befa90967..f0d118e9f155 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -51,6 +51,7 @@
 #include "smc_close.h"
 #include "smc_stats.h"
 #include "smc_tracepoint.h"
+#include "smc_sysctl.h"
 
 static DEFINE_MUTEX(smc_server_lgr_pending);	/* serialize link group
 						 * creation on server
@@ -59,12 +60,52 @@ static DEFINE_MUTEX(smc_client_lgr_pending);	/* serialize link group
 						 * creation on client
 						 */
 
+static struct workqueue_struct	*smc_tcp_ls_wq;	/* wq for tcp listen work */
 struct workqueue_struct	*smc_hs_wq;	/* wq for handshake work */
 struct workqueue_struct	*smc_close_wq;	/* wq for close work */
 
 static void smc_tcp_listen_work(struct work_struct *);
 static void smc_connect_work(struct work_struct *);
 
+int smc_nl_dump_hs_limitation(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	struct smc_nl_dmp_ctx *cb_ctx = smc_nl_dmp_ctx(cb);
+	void *hdr;
+
+	if (cb_ctx->pos[0])
+		goto out;
+
+	hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
+			  &smc_gen_nl_family, NLM_F_MULTI,
+			  SMC_NETLINK_DUMP_HS_LIMITATION);
+	if (!hdr)
+		return -ENOMEM;
+
+	if (nla_put_u8(skb, SMC_NLA_HS_LIMITATION_ENABLED,
+		       sock_net(skb->sk)->smc.limit_smc_hs))
+		goto err;
+
+	genlmsg_end(skb, hdr);
+	cb_ctx->pos[0] = 1;
+out:
+	return skb->len;
+err:
+	genlmsg_cancel(skb, hdr);
+	return -EMSGSIZE;
+}
+
+int smc_nl_enable_hs_limitation(struct sk_buff *skb, struct genl_info *info)
+{
+	sock_net(skb->sk)->smc.limit_smc_hs = true;
+	return 0;
+}
+
+int smc_nl_disable_hs_limitation(struct sk_buff *skb, struct genl_info *info)
+{
+	sock_net(skb->sk)->smc.limit_smc_hs = false;
+	return 0;
+}
+
 static void smc_set_keepalive(struct sock *sk, int val)
 {
 	struct smc_sock *smc = smc_sk(sk);
@@ -72,6 +113,51 @@ static void smc_set_keepalive(struct sock *sk, int val)
 	smc->clcsock->sk->sk_prot->keepalive(smc->clcsock->sk, val);
 }
 
+static struct sock *smc_tcp_syn_recv_sock(const struct sock *sk,
+					  struct sk_buff *skb,
+					  struct request_sock *req,
+					  struct dst_entry *dst,
+					  struct request_sock *req_unhash,
+					  bool *own_req)
+{
+	struct smc_sock *smc;
+
+	smc = smc_clcsock_user_data(sk);
+
+	if (READ_ONCE(sk->sk_ack_backlog) + atomic_read(&smc->queued_smc_hs) >
+				sk->sk_max_ack_backlog)
+		goto drop;
+
+	if (sk_acceptq_is_full(&smc->sk)) {
+		NET_INC_STATS(sock_net(sk), LINUX_MIB_LISTENOVERFLOWS);
+		goto drop;
+	}
+
+	/* passthrough to original syn recv sock fct */
+	return smc->ori_af_ops->syn_recv_sock(sk, skb, req, dst, req_unhash,
+					      own_req);
+
+drop:
+	dst_release(dst);
+	tcp_listendrop(sk);
+	return NULL;
+}
+
+static bool smc_hs_congested(const struct sock *sk)
+{
+	const struct smc_sock *smc;
+
+	smc = smc_clcsock_user_data(sk);
+
+	if (!smc)
+		return true;
+
+	if (workqueue_congested(WORK_CPU_UNBOUND, smc_hs_wq))
+		return true;
+
+	return false;
+}
+
 static struct smc_hashinfo smc_v4_hashinfo = {
 	.lock = __RW_LOCK_UNLOCKED(smc_v4_hashinfo.lock),
 };
@@ -107,12 +193,27 @@ void smc_unhash_sk(struct sock *sk)
 }
 EXPORT_SYMBOL_GPL(smc_unhash_sk);
 
+/* This will be called before user really release sock_lock. So do the
+ * work which we didn't do because of user hold the sock_lock in the
+ * BH context
+ */
+static void smc_release_cb(struct sock *sk)
+{
+	struct smc_sock *smc = smc_sk(sk);
+
+	if (smc->conn.tx_in_release_sock) {
+		smc_tx_pending(&smc->conn);
+		smc->conn.tx_in_release_sock = false;
+	}
+}
+
 struct proto smc_proto = {
 	.name		= "SMC",
 	.owner		= THIS_MODULE,
 	.keepalive	= smc_set_keepalive,
 	.hash		= smc_hash_sk,
 	.unhash		= smc_unhash_sk,
+	.release_cb	= smc_release_cb,
 	.obj_size	= sizeof(struct smc_sock),
 	.h.smc_hash	= &smc_v4_hashinfo,
 	.slab_flags	= SLAB_TYPESAFE_BY_RCU,
@@ -125,6 +226,7 @@ struct proto smc_proto6 = {
 	.keepalive	= smc_set_keepalive,
 	.hash		= smc_hash_sk,
 	.unhash		= smc_unhash_sk,
+	.release_cb	= smc_release_cb,
 	.obj_size	= sizeof(struct smc_sock),
 	.h.smc_hash	= &smc_v6_hashinfo,
 	.slab_flags	= SLAB_TYPESAFE_BY_RCU,
@@ -1297,8 +1399,14 @@ static int __smc_connect(struct smc_sock *smc)
 
 	/* perform CLC handshake */
 	rc = smc_connect_clc(smc, aclc2, ini);
-	if (rc)
+	if (rc) {
+		/* -EAGAIN on timeout, see tcp_recvmsg() */
+		if (rc == -EAGAIN) {
+			rc = -ETIMEDOUT;
+			smc->sk.sk_err = ETIMEDOUT;
+		}
 		goto vlan_cleanup;
+	}
 
 	/* check if smc modes and versions of CLC proposal and accept match */
 	rc = smc_connect_check_aclc(ini, aclc);
@@ -1604,6 +1712,9 @@ static void smc_listen_out(struct smc_sock *new_smc)
 	struct smc_sock *lsmc = new_smc->listen_smc;
 	struct sock *newsmcsk = &new_smc->sk;
 
+	if (tcp_sk(new_smc->clcsock->sk)->syn_smc)
+		atomic_dec(&lsmc->queued_smc_hs);
+
 	if (lsmc->sk.sk_state == SMC_LISTEN) {
 		lock_sock_nested(&lsmc->sk, SINGLE_DEPTH_NESTING);
 		smc_accept_enqueue(&lsmc->sk, newsmcsk);
@@ -2209,6 +2320,9 @@ static void smc_tcp_listen_work(struct work_struct *work)
 		if (!new_smc)
 			continue;
 
+		if (tcp_sk(new_smc->clcsock->sk)->syn_smc)
+			atomic_inc(&lsmc->queued_smc_hs);
+
 		new_smc->listen_smc = lsmc;
 		new_smc->use_fallback = lsmc->use_fallback;
 		new_smc->fallback_rsn = lsmc->fallback_rsn;
@@ -2237,7 +2351,7 @@ static void smc_clcsock_data_ready(struct sock *listen_clcsock)
 	lsmc->clcsk_data_ready(listen_clcsock);
 	if (lsmc->sk.sk_state == SMC_LISTEN) {
 		sock_hold(&lsmc->sk); /* sock_put in smc_tcp_listen_work() */
-		if (!queue_work(smc_hs_wq, &lsmc->tcp_listen_work))
+		if (!queue_work(smc_tcp_ls_wq, &lsmc->tcp_listen_work))
 			sock_put(&lsmc->sk);
 	}
 }
@@ -2275,6 +2389,18 @@ static int smc_listen(struct socket *sock, int backlog)
 	smc->clcsock->sk->sk_data_ready = smc_clcsock_data_ready;
 	smc->clcsock->sk->sk_user_data =
 		(void *)((uintptr_t)smc | SK_USER_DATA_NOCOPY);
+
+	/* save original ops */
+	smc->ori_af_ops = inet_csk(smc->clcsock->sk)->icsk_af_ops;
+
+	smc->af_ops = *smc->ori_af_ops;
+	smc->af_ops.syn_recv_sock = smc_tcp_syn_recv_sock;
+
+	inet_csk(smc->clcsock->sk)->icsk_af_ops = &smc->af_ops;
+
+	if (smc->limit_smc_hs)
+		tcp_sk(smc->clcsock->sk)->smc_hs_congested = smc_hs_congested;
+
 	rc = kernel_listen(smc->clcsock, backlog);
 	if (rc) {
 		smc->clcsock->sk->sk_data_ready = smc->clcsk_data_ready;
@@ -2568,6 +2694,71 @@ out:
 	return rc ? rc : rc1;
 }
 
+static int __smc_getsockopt(struct socket *sock, int level, int optname,
+			    char __user *optval, int __user *optlen)
+{
+	struct smc_sock *smc;
+	int val, len;
+
+	smc = smc_sk(sock->sk);
+
+	if (get_user(len, optlen))
+		return -EFAULT;
+
+	len = min_t(int, len, sizeof(int));
+
+	if (len < 0)
+		return -EINVAL;
+
+	switch (optname) {
+	case SMC_LIMIT_HS:
+		val = smc->limit_smc_hs;
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	if (put_user(len, optlen))
+		return -EFAULT;
+	if (copy_to_user(optval, &val, len))
+		return -EFAULT;
+
+	return 0;
+}
+
+static int __smc_setsockopt(struct socket *sock, int level, int optname,
+			    sockptr_t optval, unsigned int optlen)
+{
+	struct sock *sk = sock->sk;
+	struct smc_sock *smc;
+	int val, rc;
+
+	smc = smc_sk(sk);
+
+	lock_sock(sk);
+	switch (optname) {
+	case SMC_LIMIT_HS:
+		if (optlen < sizeof(int)) {
+			rc = -EINVAL;
+			break;
+		}
+		if (copy_from_sockptr(&val, optval, sizeof(int))) {
+			rc = -EFAULT;
+			break;
+		}
+
+		smc->limit_smc_hs = !!val;
+		rc = 0;
+		break;
+	default:
+		rc = -EOPNOTSUPP;
+		break;
+	}
+	release_sock(sk);
+
+	return rc;
+}
+
 static int smc_setsockopt(struct socket *sock, int level, int optname,
 			  sockptr_t optval, unsigned int optlen)
 {
@@ -2577,6 +2768,8 @@ static int smc_setsockopt(struct socket *sock, int level, int optname,
 
 	if (level == SOL_TCP && optname == TCP_ULP)
 		return -EOPNOTSUPP;
+	else if (level == SOL_SMC)
+		return __smc_setsockopt(sock, level, optname, optval, optlen);
 
 	smc = smc_sk(sk);
 
@@ -2625,8 +2818,8 @@ static int smc_setsockopt(struct socket *sock, int level, int optname,
 		    sk->sk_state != SMC_CLOSED) {
 			if (val) {
 				SMC_STAT_INC(smc, ndly_cnt);
-				mod_delayed_work(smc->conn.lgr->tx_wq,
-						 &smc->conn.tx_work, 0);
+				smc_tx_pending(&smc->conn);
+				cancel_delayed_work(&smc->conn.tx_work);
 			}
 		}
 		break;
@@ -2636,8 +2829,8 @@ static int smc_setsockopt(struct socket *sock, int level, int optname,
 		    sk->sk_state != SMC_CLOSED) {
 			if (!val) {
 				SMC_STAT_INC(smc, cork_cnt);
-				mod_delayed_work(smc->conn.lgr->tx_wq,
-						 &smc->conn.tx_work, 0);
+				smc_tx_pending(&smc->conn);
+				cancel_delayed_work(&smc->conn.tx_work);
 			}
 		}
 		break;
@@ -2659,6 +2852,9 @@ static int smc_getsockopt(struct socket *sock, int level, int optname,
 	struct smc_sock *smc;
 	int rc;
 
+	if (level == SOL_SMC)
+		return __smc_getsockopt(sock, level, optname, optval, optlen);
+
 	smc = smc_sk(sock->sk);
 	mutex_lock(&smc->clcsock_release_lock);
 	if (!smc->clcsock) {
@@ -2775,8 +2971,10 @@ static ssize_t smc_sendpage(struct socket *sock, struct page *page,
 		rc = kernel_sendpage(smc->clcsock, page, offset,
 				     size, flags);
 	} else {
+		lock_sock(sk);
+		rc = smc_tx_sendpage(smc, page, offset, size, flags);
+		release_sock(sk);
 		SMC_STAT_INC(smc, sendpage_cnt);
-		rc = sock_no_sendpage(sock, page, offset, size, flags);
 	}
 
 out:
@@ -2885,6 +3083,9 @@ static int __smc_create(struct net *net, struct socket *sock, int protocol,
 	smc->use_fallback = false; /* assume rdma capability first */
 	smc->fallback_rsn = 0;
 
+	/* default behavior from limit_smc_hs in every net namespace */
+	smc->limit_smc_hs = net->smc.limit_smc_hs;
+
 	rc = 0;
 	if (!clcsock) {
 		rc = sock_create_kern(net, family, SOCK_STREAM, IPPROTO_TCP,
@@ -2978,11 +3179,17 @@ unsigned int smc_net_id;
 
 static __net_init int smc_net_init(struct net *net)
 {
+	int rc;
+
+	rc = smc_sysctl_net_init(net);
+	if (rc)
+		return rc;
 	return smc_pnet_net_init(net);
 }
 
 static void __net_exit smc_net_exit(struct net *net)
 {
+	smc_sysctl_net_exit(net);
 	smc_pnet_net_exit(net);
 }
 
@@ -3032,9 +3239,14 @@ static int __init smc_init(void)
 		goto out_nl;
 
 	rc = -ENOMEM;
+
+	smc_tcp_ls_wq = alloc_workqueue("smc_tcp_ls_wq", 0, 0);
+	if (!smc_tcp_ls_wq)
+		goto out_pnet;
+
 	smc_hs_wq = alloc_workqueue("smc_hs_wq", 0, 0);
 	if (!smc_hs_wq)
-		goto out_pnet;
+		goto out_alloc_tcp_ls_wq;
 
 	smc_close_wq = alloc_workqueue("smc_close_wq", 0, 0);
 	if (!smc_close_wq)
@@ -3107,6 +3319,8 @@ out_alloc_wqs:
 	destroy_workqueue(smc_close_wq);
 out_alloc_hs_wq:
 	destroy_workqueue(smc_hs_wq);
+out_alloc_tcp_ls_wq:
+	destroy_workqueue(smc_tcp_ls_wq);
 out_pnet:
 	smc_pnet_exit();
 out_nl:
@@ -3125,6 +3339,7 @@ static void __exit smc_exit(void)
 	smc_core_exit();
 	smc_ib_unregister_client();
 	destroy_workqueue(smc_close_wq);
+	destroy_workqueue(smc_tcp_ls_wq);
 	destroy_workqueue(smc_hs_wq);
 	proto_unregister(&smc_proto6);
 	proto_unregister(&smc_proto);
diff --git a/net/smc/smc.h b/net/smc/smc.h
index 37b2001a0255..ea0620529ebe 100644
--- a/net/smc/smc.h
+++ b/net/smc/smc.h
@@ -14,6 +14,7 @@
 #include <linux/socket.h>
 #include <linux/types.h>
 #include <linux/compiler.h> /* __aligned */
+#include <net/genetlink.h>
 #include <net/sock.h>
 
 #include "smc_ib.h"
@@ -28,6 +29,7 @@
 #define SMC_MAX_ISM_DEVS	8	/* max # of proposed non-native ISM
 					 * devices
 					 */
+#define SMC_AUTOCORKING_DEFAULT_SIZE	0x10000	/* 64K by default */
 
 extern struct proto smc_proto;
 extern struct proto smc_proto6;
@@ -191,6 +193,7 @@ struct smc_connection {
 						 * - dec on polled tx cqe
 						 */
 	wait_queue_head_t	cdc_pend_tx_wq; /* wakeup on no cdc_pend_tx_wr*/
+	atomic_t		tx_pushing;     /* nr_threads trying tx push */
 	struct delayed_work	tx_work;	/* retry of smc_cdc_msg_send */
 	u32			tx_off;		/* base offset in peer rmb */
 
@@ -210,6 +213,10 @@ struct smc_connection {
 						 * data still pending
 						 */
 	char			urg_rx_byte;	/* urgent byte */
+	bool			tx_in_release_sock;
+						/* flush pending tx data in
+						 * sock release_cb()
+						 */
 	atomic_t		bytes_to_rcv;	/* arrived data,
 						 * not yet received
 						 */
@@ -249,9 +256,14 @@ struct smc_sock {				/* smc sock container */
 	struct work_struct	smc_listen_work;/* prepare new accept socket */
 	struct list_head	accept_q;	/* sockets to be accepted */
 	spinlock_t		accept_q_lock;	/* protects accept_q */
+	bool			limit_smc_hs;	/* put constraint on handshake */
 	bool			use_fallback;	/* fallback to tcp */
 	int			fallback_rsn;	/* reason for fallback */
 	u32			peer_diagnosis; /* decline reason from peer */
+	atomic_t                queued_smc_hs;  /* queued smc handshakes */
+	struct inet_connection_sock_af_ops		af_ops;
+	const struct inet_connection_sock_af_ops	*ori_af_ops;
+						/* original af ops */
 	int			sockopt_defer_accept;
 						/* sockopt TCP_DEFER_ACCEPT
 						 * value
@@ -276,7 +288,7 @@ static inline struct smc_sock *smc_sk(const struct sock *sk)
 	return (struct smc_sock *)sk;
 }
 
-static inline struct smc_sock *smc_clcsock_user_data(struct sock *clcsk)
+static inline struct smc_sock *smc_clcsock_user_data(const struct sock *clcsk)
 {
 	return (struct smc_sock *)
 	       ((uintptr_t)clcsk->sk_user_data & ~SK_USER_DATA_NOCOPY);
@@ -331,4 +343,9 @@ void smc_fill_gid_list(struct smc_link_group *lgr,
 		       struct smc_gidlist *gidlist,
 		       struct smc_ib_device *known_dev, u8 *known_gid);
 
+/* smc handshake limitation interface for netlink  */
+int smc_nl_dump_hs_limitation(struct sk_buff *skb, struct netlink_callback *cb);
+int smc_nl_enable_hs_limitation(struct sk_buff *skb, struct genl_info *info);
+int smc_nl_disable_hs_limitation(struct sk_buff *skb, struct genl_info *info);
+
 #endif	/* __SMC_H */
diff --git a/net/smc/smc_cdc.c b/net/smc/smc_cdc.c
index 9d5a97168969..5c731f27996e 100644
--- a/net/smc/smc_cdc.c
+++ b/net/smc/smc_cdc.c
@@ -48,9 +48,19 @@ static void smc_cdc_tx_handler(struct smc_wr_tx_pend_priv *pnd_snd,
 		conn->tx_cdc_seq_fin = cdcpend->ctrl_seq;
 	}
 
-	if (atomic_dec_and_test(&conn->cdc_pend_tx_wr) &&
-	    unlikely(wq_has_sleeper(&conn->cdc_pend_tx_wq)))
-		wake_up(&conn->cdc_pend_tx_wq);
+	if (atomic_dec_and_test(&conn->cdc_pend_tx_wr)) {
+		/* If user owns the sock_lock, mark the connection need sending.
+		 * User context will later try to send when it release sock_lock
+		 * in smc_release_cb()
+		 */
+		if (sock_owned_by_user(&smc->sk))
+			conn->tx_in_release_sock = true;
+		else
+			smc_tx_pending(conn);
+
+		if (unlikely(wq_has_sleeper(&conn->cdc_pend_tx_wq)))
+			wake_up(&conn->cdc_pend_tx_wq);
+	}
 	WARN_ON(atomic_read(&conn->cdc_pend_tx_wr) < 0);
 
 	smc_tx_sndbuf_nonfull(smc);
@@ -350,8 +360,12 @@ static void smc_cdc_msg_recv_action(struct smc_sock *smc,
 	/* trigger sndbuf consumer: RDMA write into peer RMBE and CDC */
 	if ((diff_cons && smc_tx_prepared_sends(conn)) ||
 	    conn->local_rx_ctrl.prod_flags.cons_curs_upd_req ||
-	    conn->local_rx_ctrl.prod_flags.urg_data_pending)
-		smc_tx_sndbuf_nonempty(conn);
+	    conn->local_rx_ctrl.prod_flags.urg_data_pending) {
+		if (!sock_owned_by_user(&smc->sk))
+			smc_tx_pending(conn);
+		else
+			conn->tx_in_release_sock = true;
+	}
 
 	if (diff_cons && conn->urg_tx_pend &&
 	    atomic_read(&conn->peer_rmbe_space) == conn->peer_rmbe_size) {
diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c
index be7d704976ff..f40f6ed0fbdb 100644
--- a/net/smc/smc_core.c
+++ b/net/smc/smc_core.c
@@ -1989,7 +1989,7 @@ static struct smc_buf_desc *smc_buf_get_slot(int compressed_bufsize,
  */
 static inline int smc_rmb_wnd_update_limit(int rmbe_size)
 {
-	return min_t(int, rmbe_size / 10, SOCK_MIN_SNDBUF / 2);
+	return max_t(int, rmbe_size / 10, SOCK_MIN_SNDBUF / 2);
 }
 
 /* map an rmb buf to a link */
diff --git a/net/smc/smc_netlink.c b/net/smc/smc_netlink.c
index f13ab0661ed5..c5a62f6f52ba 100644
--- a/net/smc/smc_netlink.c
+++ b/net/smc/smc_netlink.c
@@ -111,6 +111,21 @@ static const struct genl_ops smc_gen_nl_ops[] = {
 		.flags = GENL_ADMIN_PERM,
 		.doit = smc_nl_disable_seid,
 	},
+	{
+		.cmd = SMC_NETLINK_DUMP_HS_LIMITATION,
+		/* can be retrieved by unprivileged users */
+		.dumpit = smc_nl_dump_hs_limitation,
+	},
+	{
+		.cmd = SMC_NETLINK_ENABLE_HS_LIMITATION,
+		.flags = GENL_ADMIN_PERM,
+		.doit = smc_nl_enable_hs_limitation,
+	},
+	{
+		.cmd = SMC_NETLINK_DISABLE_HS_LIMITATION,
+		.flags = GENL_ADMIN_PERM,
+		.doit = smc_nl_disable_hs_limitation,
+	},
 };
 
 static const struct nla_policy smc_gen_nl_policy[2] = {
diff --git a/net/smc/smc_pnet.c b/net/smc/smc_pnet.c
index 29f0a559d884..7984f8883472 100644
--- a/net/smc/smc_pnet.c
+++ b/net/smc/smc_pnet.c
@@ -870,6 +870,9 @@ int smc_pnet_net_init(struct net *net)
 
 	smc_pnet_create_pnetids_list(net);
 
+	/* disable handshake limitation by default */
+	net->smc.limit_smc_hs = 0;
+
 	return 0;
 }
 
diff --git a/net/smc/smc_sysctl.c b/net/smc/smc_sysctl.c
new file mode 100644
index 000000000000..bae19419e755
--- /dev/null
+++ b/net/smc/smc_sysctl.c
@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  Shared Memory Communications over RDMA (SMC-R) and RoCE
+ *
+ *  smc_sysctl.c: sysctl interface to SMC subsystem.
+ *
+ *  Copyright (c) 2022, Alibaba Inc.
+ *
+ *  Author: Tony Lu <tonylu@linux.alibaba.com>
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/sysctl.h>
+#include <net/net_namespace.h>
+
+#include "smc.h"
+#include "smc_sysctl.h"
+
+static struct ctl_table smc_table[] = {
+	{
+		.procname       = "autocorking_size",
+		.data           = &init_net.smc.sysctl_autocorking_size,
+		.maxlen         = sizeof(unsigned int),
+		.mode           = 0644,
+		.proc_handler	= proc_douintvec,
+	},
+	{  }
+};
+
+int __net_init smc_sysctl_net_init(struct net *net)
+{
+	struct ctl_table *table;
+
+	table = smc_table;
+	if (!net_eq(net, &init_net)) {
+		int i;
+
+		table = kmemdup(table, sizeof(smc_table), GFP_KERNEL);
+		if (!table)
+			goto err_alloc;
+
+		for (i = 0; i < ARRAY_SIZE(smc_table) - 1; i++)
+			table[i].data += (void *)net - (void *)&init_net;
+	}
+
+	net->smc.smc_hdr = register_net_sysctl(net, "net/smc", table);
+	if (!net->smc.smc_hdr)
+		goto err_reg;
+
+	net->smc.sysctl_autocorking_size = SMC_AUTOCORKING_DEFAULT_SIZE;
+
+	return 0;
+
+err_reg:
+	if (!net_eq(net, &init_net))
+		kfree(table);
+err_alloc:
+	return -ENOMEM;
+}
+
+void __net_exit smc_sysctl_net_exit(struct net *net)
+{
+	unregister_net_sysctl_table(net->smc.smc_hdr);
+}
diff --git a/net/smc/smc_sysctl.h b/net/smc/smc_sysctl.h
new file mode 100644
index 000000000000..0becc11bd2f4
--- /dev/null
+++ b/net/smc/smc_sysctl.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *  Shared Memory Communications over RDMA (SMC-R) and RoCE
+ *
+ *  smc_sysctl.c: sysctl interface to SMC subsystem.
+ *
+ *  Copyright (c) 2022, Alibaba Inc.
+ *
+ *  Author: Tony Lu <tonylu@linux.alibaba.com>
+ *
+ */
+
+#ifndef _SMC_SYSCTL_H
+#define _SMC_SYSCTL_H
+
+#ifdef CONFIG_SYSCTL
+
+int __net_init smc_sysctl_net_init(struct net *net);
+void __net_exit smc_sysctl_net_exit(struct net *net);
+
+#else
+
+static inline int smc_sysctl_net_init(struct net *net)
+{
+	net->smc.sysctl_autocorking_size = SMC_AUTOCORKING_DEFAULT_SIZE;
+	return 0;
+}
+
+static inline void smc_sysctl_net_exit(struct net *net) { }
+
+#endif /* CONFIG_SYSCTL */
+
+#endif /* _SMC_SYSCTL_H */
diff --git a/net/smc/smc_tx.c b/net/smc/smc_tx.c
index be241d53020f..98ca9229fe87 100644
--- a/net/smc/smc_tx.c
+++ b/net/smc/smc_tx.c
@@ -31,7 +31,6 @@
 #include "smc_tracepoint.h"
 
 #define SMC_TX_WORK_DELAY	0
-#define SMC_TX_CORK_DELAY	(HZ >> 2)	/* 250 ms */
 
 /***************************** sndbuf producer *******************************/
 
@@ -132,6 +131,51 @@ static bool smc_tx_is_corked(struct smc_sock *smc)
 	return (tp->nonagle & TCP_NAGLE_CORK) ? true : false;
 }
 
+/* If we have pending CDC messages, do not send:
+ * Because CQE of this CDC message will happen shortly, it gives
+ * a chance to coalesce future sendmsg() payload in to one RDMA Write,
+ * without need for a timer, and with no latency trade off.
+ * Algorithm here:
+ *  1. First message should never cork
+ *  2. If we have pending Tx CDC messages, wait for the first CDC
+ *     message's completion
+ *  3. Don't cork to much data in a single RDMA Write to prevent burst
+ *     traffic, total corked message should not exceed sendbuf/2
+ */
+static bool smc_should_autocork(struct smc_sock *smc)
+{
+	struct smc_connection *conn = &smc->conn;
+	int corking_size;
+
+	corking_size = min_t(unsigned int, conn->sndbuf_desc->len >> 1,
+			     sock_net(&smc->sk)->smc.sysctl_autocorking_size);
+
+	if (atomic_read(&conn->cdc_pend_tx_wr) == 0 ||
+	    smc_tx_prepared_sends(conn) > corking_size)
+		return false;
+	return true;
+}
+
+static bool smc_tx_should_cork(struct smc_sock *smc, struct msghdr *msg)
+{
+	struct smc_connection *conn = &smc->conn;
+
+	if (smc_should_autocork(smc))
+		return true;
+
+	/* for a corked socket defer the RDMA writes if
+	 * sndbuf_space is still available. The applications
+	 * should known how/when to uncork it.
+	 */
+	if ((msg->msg_flags & MSG_MORE ||
+	     smc_tx_is_corked(smc) ||
+	     msg->msg_flags & MSG_SENDPAGE_NOTLAST) &&
+	    atomic_read(&conn->sndbuf_space))
+		return true;
+
+	return false;
+}
+
 /* sndbuf producer: main API called by socket layer.
  * called under sock lock.
  */
@@ -236,15 +280,10 @@ int smc_tx_sendmsg(struct smc_sock *smc, struct msghdr *msg, size_t len)
 		 */
 		if ((msg->msg_flags & MSG_OOB) && !send_remaining)
 			conn->urg_tx_pend = true;
-		if ((msg->msg_flags & MSG_MORE || smc_tx_is_corked(smc)) &&
-		    (atomic_read(&conn->sndbuf_space) >
-						(conn->sndbuf_desc->len >> 1)))
-			/* for a corked socket defer the RDMA writes if there
-			 * is still sufficient sndbuf_space available
-			 */
-			queue_delayed_work(conn->lgr->tx_wq, &conn->tx_work,
-					   SMC_TX_CORK_DELAY);
-		else
+		/* If we need to cork, do nothing and wait for the next
+		 * sendmsg() call or push on tx completion
+		 */
+		if (!smc_tx_should_cork(smc, msg))
 			smc_tx_sndbuf_nonempty(conn);
 
 		trace_smc_tx_sendmsg(smc, copylen);
@@ -260,6 +299,22 @@ out_err:
 	return rc;
 }
 
+int smc_tx_sendpage(struct smc_sock *smc, struct page *page, int offset,
+		    size_t size, int flags)
+{
+	struct msghdr msg = {.msg_flags = flags};
+	char *kaddr = kmap(page);
+	struct kvec iov;
+	int rc;
+
+	iov.iov_base = kaddr + offset;
+	iov.iov_len = size;
+	iov_iter_kvec(&msg.msg_iter, WRITE, &iov, 1, size);
+	rc = smc_tx_sendmsg(smc, &msg, size);
+	kunmap(page);
+	return rc;
+}
+
 /***************************** sndbuf consumer *******************************/
 
 /* sndbuf consumer: actual data transfer of one target chunk with ISM write */
@@ -576,13 +631,26 @@ static int smcd_tx_sndbuf_nonempty(struct smc_connection *conn)
 	return rc;
 }
 
-int smc_tx_sndbuf_nonempty(struct smc_connection *conn)
+static int __smc_tx_sndbuf_nonempty(struct smc_connection *conn)
 {
-	int rc;
+	struct smc_sock *smc = container_of(conn, struct smc_sock, conn);
+	int rc = 0;
+
+	/* No data in the send queue */
+	if (unlikely(smc_tx_prepared_sends(conn) <= 0))
+		goto out;
+
+	/* Peer don't have RMBE space */
+	if (unlikely(atomic_read(&conn->peer_rmbe_space) <= 0)) {
+		SMC_STAT_RMB_TX_PEER_FULL(smc, !conn->lnk);
+		goto out;
+	}
 
 	if (conn->killed ||
-	    conn->local_rx_ctrl.conn_state_flags.peer_conn_abort)
-		return -EPIPE;	/* connection being aborted */
+	    conn->local_rx_ctrl.conn_state_flags.peer_conn_abort) {
+		rc = -EPIPE;    /* connection being aborted */
+		goto out;
+	}
 	if (conn->lgr->is_smcd)
 		rc = smcd_tx_sndbuf_nonempty(conn);
 	else
@@ -590,34 +658,72 @@ int smc_tx_sndbuf_nonempty(struct smc_connection *conn)
 
 	if (!rc) {
 		/* trigger socket release if connection is closing */
-		struct smc_sock *smc = container_of(conn, struct smc_sock,
-						    conn);
 		smc_close_wake_tx_prepared(smc);
 	}
+
+out:
+	return rc;
+}
+
+int smc_tx_sndbuf_nonempty(struct smc_connection *conn)
+{
+	int rc;
+
+	/* This make sure only one can send simultaneously to prevent wasting
+	 * of CPU and CDC slot.
+	 * Record whether someone has tried to push while we are pushing.
+	 */
+	if (atomic_inc_return(&conn->tx_pushing) > 1)
+		return 0;
+
+again:
+	atomic_set(&conn->tx_pushing, 1);
+	smp_wmb(); /* Make sure tx_pushing is 1 before real send */
+	rc = __smc_tx_sndbuf_nonempty(conn);
+
+	/* We need to check whether someone else have added some data into
+	 * the send queue and tried to push but failed after the atomic_set()
+	 * when we are pushing.
+	 * If so, we need to push again to prevent those data hang in the send
+	 * queue.
+	 */
+	if (unlikely(!atomic_dec_and_test(&conn->tx_pushing)))
+		goto again;
+
 	return rc;
 }
 
 /* Wakeup sndbuf consumers from process context
- * since there is more data to transmit
+ * since there is more data to transmit. The caller
+ * must hold sock lock.
  */
-void smc_tx_work(struct work_struct *work)
+void smc_tx_pending(struct smc_connection *conn)
 {
-	struct smc_connection *conn = container_of(to_delayed_work(work),
-						   struct smc_connection,
-						   tx_work);
 	struct smc_sock *smc = container_of(conn, struct smc_sock, conn);
 	int rc;
 
-	lock_sock(&smc->sk);
 	if (smc->sk.sk_err)
-		goto out;
+		return;
 
 	rc = smc_tx_sndbuf_nonempty(conn);
 	if (!rc && conn->local_rx_ctrl.prod_flags.write_blocked &&
 	    !atomic_read(&conn->bytes_to_rcv))
 		conn->local_rx_ctrl.prod_flags.write_blocked = 0;
+}
 
-out:
+/* Wakeup sndbuf consumers from process context
+ * since there is more data to transmit in locked
+ * sock.
+ */
+void smc_tx_work(struct work_struct *work)
+{
+	struct smc_connection *conn = container_of(to_delayed_work(work),
+						   struct smc_connection,
+						   tx_work);
+	struct smc_sock *smc = container_of(conn, struct smc_sock, conn);
+
+	lock_sock(&smc->sk);
+	smc_tx_pending(conn);
 	release_sock(&smc->sk);
 }
 
diff --git a/net/smc/smc_tx.h b/net/smc/smc_tx.h
index 07e6ad76224a..34b578498b1f 100644
--- a/net/smc/smc_tx.h
+++ b/net/smc/smc_tx.h
@@ -27,9 +27,12 @@ static inline int smc_tx_prepared_sends(struct smc_connection *conn)
 	return smc_curs_diff(conn->sndbuf_desc->len, &sent, &prep);
 }
 
+void smc_tx_pending(struct smc_connection *conn);
 void smc_tx_work(struct work_struct *work);
 void smc_tx_init(struct smc_sock *smc);
 int smc_tx_sendmsg(struct smc_sock *smc, struct msghdr *msg, size_t len);
+int smc_tx_sendpage(struct smc_sock *smc, struct page *page, int offset,
+		    size_t size, int flags);
 int smc_tx_sndbuf_nonempty(struct smc_connection *conn);
 void smc_tx_sndbuf_nonfull(struct smc_sock *smc);
 void smc_tx_consumer_update(struct smc_connection *conn, bool force);
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index 5f42aa5fc612..8eb7e8544815 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -72,7 +72,8 @@ struct gss_auth {
 	struct gss_api_mech *mech;
 	enum rpc_gss_svc service;
 	struct rpc_clnt *client;
-	struct net *net;
+	struct net	*net;
+	netns_tracker	ns_tracker;
 	/*
 	 * There are two upcall pipes; dentry[1], named "gssd", is used
 	 * for the new text-based upcall; dentry[0] is named after the
@@ -1013,7 +1014,8 @@ gss_create_new(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
 			goto err_free;
 	}
 	gss_auth->client = clnt;
-	gss_auth->net = get_net(rpc_net_ns(clnt));
+	gss_auth->net = get_net_track(rpc_net_ns(clnt), &gss_auth->ns_tracker,
+				      GFP_KERNEL);
 	err = -EINVAL;
 	gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor);
 	if (!gss_auth->mech)
@@ -1068,7 +1070,7 @@ err_destroy_credcache:
 err_put_mech:
 	gss_mech_put(gss_auth->mech);
 err_put_net:
-	put_net(gss_auth->net);
+	put_net_track(gss_auth->net, &gss_auth->ns_tracker);
 err_free:
 	kfree(gss_auth->target_name);
 	kfree(gss_auth);
@@ -1084,7 +1086,7 @@ gss_free(struct gss_auth *gss_auth)
 	gss_pipe_free(gss_auth->gss_pipe[0]);
 	gss_pipe_free(gss_auth->gss_pipe[1]);
 	gss_mech_put(gss_auth->mech);
-	put_net(gss_auth->net);
+	put_net_track(gss_auth->net, &gss_auth->ns_tracker);
 	kfree(gss_auth->target_name);
 
 	kfree(gss_auth);
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index 0c117d3bfda8..297c49855038 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -162,7 +162,7 @@ static void svc_xprt_free(struct kref *kref)
 	if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags))
 		svcauth_unix_info_release(xprt);
 	put_cred(xprt->xpt_cred);
-	put_net(xprt->xpt_net);
+	put_net_track(xprt->xpt_net, &xprt->ns_tracker);
 	/* See comment on corresponding get in xs_setup_bc_tcp(): */
 	if (xprt->xpt_bc_xprt)
 		xprt_put(xprt->xpt_bc_xprt);
@@ -198,7 +198,7 @@ void svc_xprt_init(struct net *net, struct svc_xprt_class *xcl,
 	mutex_init(&xprt->xpt_mutex);
 	spin_lock_init(&xprt->xpt_lock);
 	set_bit(XPT_BUSY, &xprt->xpt_flags);
-	xprt->xpt_net = get_net(net);
+	xprt->xpt_net = get_net_track(net, &xprt->ns_tracker, GFP_ATOMIC);
 	strcpy(xprt->xpt_remotebuf, "uninitialized");
 }
 EXPORT_SYMBOL_GPL(svc_xprt_init);
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index a02de2bddb28..5af484d6ba5e 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -1835,7 +1835,7 @@ EXPORT_SYMBOL_GPL(xprt_alloc);
 
 void xprt_free(struct rpc_xprt *xprt)
 {
-	put_net(xprt->xprt_net);
+	put_net_track(xprt->xprt_net, &xprt->ns_tracker);
 	xprt_free_all_slots(xprt);
 	xprt_free_id(xprt);
 	rpc_sysfs_xprt_destroy(xprt);
@@ -2027,7 +2027,7 @@ static void xprt_init(struct rpc_xprt *xprt, struct net *net)
 
 	xprt_init_xid(xprt);
 
-	xprt->xprt_net = get_net(net);
+	xprt->xprt_net = get_net_track(net, &xprt->ns_tracker, GFP_KERNEL);
 }
 
 /**
diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
index b62565278fac..474f76383033 100644
--- a/net/switchdev/switchdev.c
+++ b/net/switchdev/switchdev.c
@@ -85,7 +85,7 @@ static int switchdev_deferred_enqueue(struct net_device *dev,
 {
 	struct switchdev_deferred_item *dfitem;
 
-	dfitem = kmalloc(sizeof(*dfitem) + data_len, GFP_ATOMIC);
+	dfitem = kmalloc(struct_size(dfitem, data, data_len), GFP_ATOMIC);
 	if (!dfitem)
 		return -ENOMEM;
 	dfitem->dev = dev;
@@ -409,6 +409,27 @@ static int switchdev_lower_dev_walk(struct net_device *lower_dev,
 }
 
 static struct net_device *
+switchdev_lower_dev_find_rcu(struct net_device *dev,
+			     bool (*check_cb)(const struct net_device *dev),
+			     bool (*foreign_dev_check_cb)(const struct net_device *dev,
+							  const struct net_device *foreign_dev))
+{
+	struct switchdev_nested_priv switchdev_priv = {
+		.check_cb = check_cb,
+		.foreign_dev_check_cb = foreign_dev_check_cb,
+		.dev = dev,
+		.lower_dev = NULL,
+	};
+	struct netdev_nested_priv priv = {
+		.data = &switchdev_priv,
+	};
+
+	netdev_walk_all_lower_dev_rcu(dev, switchdev_lower_dev_walk, &priv);
+
+	return switchdev_priv.lower_dev;
+}
+
+static struct net_device *
 switchdev_lower_dev_find(struct net_device *dev,
 			 bool (*check_cb)(const struct net_device *dev),
 			 bool (*foreign_dev_check_cb)(const struct net_device *dev,
@@ -424,7 +445,7 @@ switchdev_lower_dev_find(struct net_device *dev,
 		.data = &switchdev_priv,
 	};
 
-	netdev_walk_all_lower_dev_rcu(dev, switchdev_lower_dev_walk, &priv);
+	netdev_walk_all_lower_dev(dev, switchdev_lower_dev_walk, &priv);
 
 	return switchdev_priv.lower_dev;
 }
@@ -437,63 +458,40 @@ static int __switchdev_handle_fdb_event_to_device(struct net_device *dev,
 					     const struct net_device *foreign_dev),
 		int (*mod_cb)(struct net_device *dev, struct net_device *orig_dev,
 			      unsigned long event, const void *ctx,
-			      const struct switchdev_notifier_fdb_info *fdb_info),
-		int (*lag_mod_cb)(struct net_device *dev, struct net_device *orig_dev,
-				  unsigned long event, const void *ctx,
-				  const struct switchdev_notifier_fdb_info *fdb_info))
+			      const struct switchdev_notifier_fdb_info *fdb_info))
 {
 	const struct switchdev_notifier_info *info = &fdb_info->info;
-	struct net_device *br, *lower_dev;
+	struct net_device *br, *lower_dev, *switchdev;
 	struct list_head *iter;
 	int err = -EOPNOTSUPP;
 
 	if (check_cb(dev))
 		return mod_cb(dev, orig_dev, event, info->ctx, fdb_info);
 
-	if (netif_is_lag_master(dev)) {
-		if (!switchdev_lower_dev_find(dev, check_cb, foreign_dev_check_cb))
-			goto maybe_bridged_with_us;
-
-		/* This is a LAG interface that we offload */
-		if (!lag_mod_cb)
-			return -EOPNOTSUPP;
-
-		return lag_mod_cb(dev, orig_dev, event, info->ctx, fdb_info);
-	}
-
 	/* Recurse through lower interfaces in case the FDB entry is pointing
-	 * towards a bridge device.
+	 * towards a bridge or a LAG device.
 	 */
-	if (netif_is_bridge_master(dev)) {
-		if (!switchdev_lower_dev_find(dev, check_cb, foreign_dev_check_cb))
-			return 0;
-
-		/* This is a bridge interface that we offload */
-		netdev_for_each_lower_dev(dev, lower_dev, iter) {
-			/* Do not propagate FDB entries across bridges */
-			if (netif_is_bridge_master(lower_dev))
-				continue;
-
-			/* Bridge ports might be either us, or LAG interfaces
-			 * that we offload.
-			 */
-			if (!check_cb(lower_dev) &&
-			    !switchdev_lower_dev_find(lower_dev, check_cb,
-						      foreign_dev_check_cb))
-				continue;
-
-			err = __switchdev_handle_fdb_event_to_device(lower_dev, orig_dev,
-								     event, fdb_info, check_cb,
-								     foreign_dev_check_cb,
-								     mod_cb, lag_mod_cb);
-			if (err && err != -EOPNOTSUPP)
-				return err;
-		}
+	netdev_for_each_lower_dev(dev, lower_dev, iter) {
+		/* Do not propagate FDB entries across bridges */
+		if (netif_is_bridge_master(lower_dev))
+			continue;
 
-		return 0;
+		/* Bridge ports might be either us, or LAG interfaces
+		 * that we offload.
+		 */
+		if (!check_cb(lower_dev) &&
+		    !switchdev_lower_dev_find_rcu(lower_dev, check_cb,
+						  foreign_dev_check_cb))
+			continue;
+
+		err = __switchdev_handle_fdb_event_to_device(lower_dev, orig_dev,
+							     event, fdb_info, check_cb,
+							     foreign_dev_check_cb,
+							     mod_cb);
+		if (err && err != -EOPNOTSUPP)
+			return err;
 	}
 
-maybe_bridged_with_us:
 	/* Event is neither on a bridge nor a LAG. Check whether it is on an
 	 * interface that is in a bridge with us.
 	 */
@@ -501,12 +499,16 @@ maybe_bridged_with_us:
 	if (!br || !netif_is_bridge_master(br))
 		return 0;
 
-	if (!switchdev_lower_dev_find(br, check_cb, foreign_dev_check_cb))
+	switchdev = switchdev_lower_dev_find_rcu(br, check_cb, foreign_dev_check_cb);
+	if (!switchdev)
 		return 0;
 
+	if (!foreign_dev_check_cb(switchdev, dev))
+		return err;
+
 	return __switchdev_handle_fdb_event_to_device(br, orig_dev, event, fdb_info,
 						      check_cb, foreign_dev_check_cb,
-						      mod_cb, lag_mod_cb);
+						      mod_cb);
 }
 
 int switchdev_handle_fdb_event_to_device(struct net_device *dev, unsigned long event,
@@ -516,16 +518,13 @@ int switchdev_handle_fdb_event_to_device(struct net_device *dev, unsigned long e
 					     const struct net_device *foreign_dev),
 		int (*mod_cb)(struct net_device *dev, struct net_device *orig_dev,
 			      unsigned long event, const void *ctx,
-			      const struct switchdev_notifier_fdb_info *fdb_info),
-		int (*lag_mod_cb)(struct net_device *dev, struct net_device *orig_dev,
-				  unsigned long event, const void *ctx,
-				  const struct switchdev_notifier_fdb_info *fdb_info))
+			      const struct switchdev_notifier_fdb_info *fdb_info))
 {
 	int err;
 
 	err = __switchdev_handle_fdb_event_to_device(dev, dev, event, fdb_info,
 						     check_cb, foreign_dev_check_cb,
-						     mod_cb, lag_mod_cb);
+						     mod_cb);
 	if (err == -EOPNOTSUPP)
 		err = 0;
 
@@ -536,13 +535,15 @@ EXPORT_SYMBOL_GPL(switchdev_handle_fdb_event_to_device);
 static int __switchdev_handle_port_obj_add(struct net_device *dev,
 			struct switchdev_notifier_port_obj_info *port_obj_info,
 			bool (*check_cb)(const struct net_device *dev),
+			bool (*foreign_dev_check_cb)(const struct net_device *dev,
+						     const struct net_device *foreign_dev),
 			int (*add_cb)(struct net_device *dev, const void *ctx,
 				      const struct switchdev_obj *obj,
 				      struct netlink_ext_ack *extack))
 {
 	struct switchdev_notifier_info *info = &port_obj_info->info;
+	struct net_device *br, *lower_dev, *switchdev;
 	struct netlink_ext_ack *extack;
-	struct net_device *lower_dev;
 	struct list_head *iter;
 	int err = -EOPNOTSUPP;
 
@@ -566,15 +567,46 @@ static int __switchdev_handle_port_obj_add(struct net_device *dev,
 		if (netif_is_bridge_master(lower_dev))
 			continue;
 
+		/* When searching for switchdev interfaces that are neighbors
+		 * of foreign ones, and @dev is a bridge, do not recurse on the
+		 * foreign interface again, it was already visited.
+		 */
+		if (foreign_dev_check_cb && !check_cb(lower_dev) &&
+		    !switchdev_lower_dev_find(lower_dev, check_cb, foreign_dev_check_cb))
+			continue;
+
 		err = __switchdev_handle_port_obj_add(lower_dev, port_obj_info,
-						      check_cb, add_cb);
+						      check_cb, foreign_dev_check_cb,
+						      add_cb);
 		if (err && err != -EOPNOTSUPP)
 			return err;
 	}
 
-	return err;
+	/* Event is neither on a bridge nor a LAG. Check whether it is on an
+	 * interface that is in a bridge with us.
+	 */
+	if (!foreign_dev_check_cb)
+		return err;
+
+	br = netdev_master_upper_dev_get(dev);
+	if (!br || !netif_is_bridge_master(br))
+		return err;
+
+	switchdev = switchdev_lower_dev_find(br, check_cb, foreign_dev_check_cb);
+	if (!switchdev)
+		return err;
+
+	if (!foreign_dev_check_cb(switchdev, dev))
+		return err;
+
+	return __switchdev_handle_port_obj_add(br, port_obj_info, check_cb,
+					       foreign_dev_check_cb, add_cb);
 }
 
+/* Pass through a port object addition, if @dev passes @check_cb, or replicate
+ * it towards all lower interfaces of @dev that pass @check_cb, if @dev is a
+ * bridge or a LAG.
+ */
 int switchdev_handle_port_obj_add(struct net_device *dev,
 			struct switchdev_notifier_port_obj_info *port_obj_info,
 			bool (*check_cb)(const struct net_device *dev),
@@ -585,21 +617,46 @@ int switchdev_handle_port_obj_add(struct net_device *dev,
 	int err;
 
 	err = __switchdev_handle_port_obj_add(dev, port_obj_info, check_cb,
-					      add_cb);
+					      NULL, add_cb);
 	if (err == -EOPNOTSUPP)
 		err = 0;
 	return err;
 }
 EXPORT_SYMBOL_GPL(switchdev_handle_port_obj_add);
 
+/* Same as switchdev_handle_port_obj_add(), except if object is notified on a
+ * @dev that passes @foreign_dev_check_cb, it is replicated towards all devices
+ * that pass @check_cb and are in the same bridge as @dev.
+ */
+int switchdev_handle_port_obj_add_foreign(struct net_device *dev,
+			struct switchdev_notifier_port_obj_info *port_obj_info,
+			bool (*check_cb)(const struct net_device *dev),
+			bool (*foreign_dev_check_cb)(const struct net_device *dev,
+						     const struct net_device *foreign_dev),
+			int (*add_cb)(struct net_device *dev, const void *ctx,
+				      const struct switchdev_obj *obj,
+				      struct netlink_ext_ack *extack))
+{
+	int err;
+
+	err = __switchdev_handle_port_obj_add(dev, port_obj_info, check_cb,
+					      foreign_dev_check_cb, add_cb);
+	if (err == -EOPNOTSUPP)
+		err = 0;
+	return err;
+}
+EXPORT_SYMBOL_GPL(switchdev_handle_port_obj_add_foreign);
+
 static int __switchdev_handle_port_obj_del(struct net_device *dev,
 			struct switchdev_notifier_port_obj_info *port_obj_info,
 			bool (*check_cb)(const struct net_device *dev),
+			bool (*foreign_dev_check_cb)(const struct net_device *dev,
+						     const struct net_device *foreign_dev),
 			int (*del_cb)(struct net_device *dev, const void *ctx,
 				      const struct switchdev_obj *obj))
 {
 	struct switchdev_notifier_info *info = &port_obj_info->info;
-	struct net_device *lower_dev;
+	struct net_device *br, *lower_dev, *switchdev;
 	struct list_head *iter;
 	int err = -EOPNOTSUPP;
 
@@ -621,15 +678,46 @@ static int __switchdev_handle_port_obj_del(struct net_device *dev,
 		if (netif_is_bridge_master(lower_dev))
 			continue;
 
+		/* When searching for switchdev interfaces that are neighbors
+		 * of foreign ones, and @dev is a bridge, do not recurse on the
+		 * foreign interface again, it was already visited.
+		 */
+		if (foreign_dev_check_cb && !check_cb(lower_dev) &&
+		    !switchdev_lower_dev_find(lower_dev, check_cb, foreign_dev_check_cb))
+			continue;
+
 		err = __switchdev_handle_port_obj_del(lower_dev, port_obj_info,
-						      check_cb, del_cb);
+						      check_cb, foreign_dev_check_cb,
+						      del_cb);
 		if (err && err != -EOPNOTSUPP)
 			return err;
 	}
 
-	return err;
+	/* Event is neither on a bridge nor a LAG. Check whether it is on an
+	 * interface that is in a bridge with us.
+	 */
+	if (!foreign_dev_check_cb)
+		return err;
+
+	br = netdev_master_upper_dev_get(dev);
+	if (!br || !netif_is_bridge_master(br))
+		return err;
+
+	switchdev = switchdev_lower_dev_find(br, check_cb, foreign_dev_check_cb);
+	if (!switchdev)
+		return err;
+
+	if (!foreign_dev_check_cb(switchdev, dev))
+		return err;
+
+	return __switchdev_handle_port_obj_del(br, port_obj_info, check_cb,
+					       foreign_dev_check_cb, del_cb);
 }
 
+/* Pass through a port object deletion, if @dev passes @check_cb, or replicate
+ * it towards all lower interfaces of @dev that pass @check_cb, if @dev is a
+ * bridge or a LAG.
+ */
 int switchdev_handle_port_obj_del(struct net_device *dev,
 			struct switchdev_notifier_port_obj_info *port_obj_info,
 			bool (*check_cb)(const struct net_device *dev),
@@ -639,13 +727,35 @@ int switchdev_handle_port_obj_del(struct net_device *dev,
 	int err;
 
 	err = __switchdev_handle_port_obj_del(dev, port_obj_info, check_cb,
-					      del_cb);
+					      NULL, del_cb);
 	if (err == -EOPNOTSUPP)
 		err = 0;
 	return err;
 }
 EXPORT_SYMBOL_GPL(switchdev_handle_port_obj_del);
 
+/* Same as switchdev_handle_port_obj_del(), except if object is notified on a
+ * @dev that passes @foreign_dev_check_cb, it is replicated towards all devices
+ * that pass @check_cb and are in the same bridge as @dev.
+ */
+int switchdev_handle_port_obj_del_foreign(struct net_device *dev,
+			struct switchdev_notifier_port_obj_info *port_obj_info,
+			bool (*check_cb)(const struct net_device *dev),
+			bool (*foreign_dev_check_cb)(const struct net_device *dev,
+						     const struct net_device *foreign_dev),
+			int (*del_cb)(struct net_device *dev, const void *ctx,
+				      const struct switchdev_obj *obj))
+{
+	int err;
+
+	err = __switchdev_handle_port_obj_del(dev, port_obj_info, check_cb,
+					      foreign_dev_check_cb, del_cb);
+	if (err == -EOPNOTSUPP)
+		err = 0;
+	return err;
+}
+EXPORT_SYMBOL_GPL(switchdev_handle_port_obj_del_foreign);
+
 static int __switchdev_handle_port_attr_set(struct net_device *dev,
 			struct switchdev_notifier_port_attr_info *port_attr_info,
 			bool (*check_cb)(const struct net_device *dev),
diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c
index a2f9c9640716..6d39ca05f249 100644
--- a/net/tipc/bearer.c
+++ b/net/tipc/bearer.c
@@ -770,7 +770,7 @@ void tipc_clone_to_loopback(struct net *net, struct sk_buff_head *pkts)
 		skb->pkt_type = PACKET_HOST;
 		skb->ip_summed = CHECKSUM_UNNECESSARY;
 		skb->protocol = eth_type_trans(skb, dev);
-		netif_rx_ni(skb);
+		netif_rx(skb);
 	}
 }
 
diff --git a/net/tipc/msg.h b/net/tipc/msg.h
index 64ae4c4c44f8..c5eec16213d7 100644
--- a/net/tipc/msg.h
+++ b/net/tipc/msg.h
@@ -226,14 +226,6 @@ static inline void msg_set_bits(struct tipc_msg *m, u32 w,
 	m->hdr[w] |= htonl(val);
 }
 
-static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b)
-{
-	u32 temp = msg->hdr[a];
-
-	msg->hdr[a] = msg->hdr[b];
-	msg->hdr[b] = temp;
-}
-
 /*
  * Word 0
  */
@@ -480,11 +472,6 @@ static inline void msg_incr_reroute_cnt(struct tipc_msg *m)
 	msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1);
 }
 
-static inline void msg_reset_reroute_cnt(struct tipc_msg *m)
-{
-	msg_set_bits(m, 1, 21, 0xf, 0);
-}
-
 static inline u32 msg_lookup_scope(struct tipc_msg *m)
 {
 	return msg_bits(m, 1, 19, 0x3);
@@ -800,11 +787,6 @@ static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
 	msg_set_word(m, 2, n);
 }
 
-static inline u32 msg_bcgap_after(struct tipc_msg *m)
-{
-	return msg_bits(m, 2, 16, 0xffff);
-}
-
 static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
 {
 	msg_set_bits(m, 2, 16, 0xffff, n);
@@ -868,11 +850,6 @@ static inline void msg_set_next_sent(struct tipc_msg *m, u16 n)
 	msg_set_bits(m, 4, 0, 0xffff, n);
 }
 
-static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
-{
-	msg_set_bits(m, 4, 0, 0xffff, n);
-}
-
 static inline u32 msg_bc_netid(struct tipc_msg *m)
 {
 	return msg_word(m, 4);
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 7545321c3440..17f8c523e33b 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -2852,7 +2852,8 @@ static void tipc_sk_retry_connect(struct sock *sk, struct sk_buff_head *list)
 
 	/* Try again later if dest link is congested */
 	if (tsk->cong_link_cnt) {
-		sk_reset_timer(sk, &sk->sk_timer, msecs_to_jiffies(100));
+		sk_reset_timer(sk, &sk->sk_timer,
+			       jiffies + msecs_to_jiffies(100));
 		return;
 	}
 	/* Prepare SYN for retransmit */
diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c
index b932469ee69c..12f7b56771d9 100644
--- a/net/tls/tls_device.c
+++ b/net/tls/tls_device.c
@@ -1028,20 +1028,21 @@ int tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
 	if (ctx->priv_ctx_tx)
 		return -EEXIST;
 
-	start_marker_record = kmalloc(sizeof(*start_marker_record), GFP_KERNEL);
-	if (!start_marker_record)
-		return -ENOMEM;
+	netdev = get_netdev_for_sock(sk);
+	if (!netdev) {
+		pr_err_ratelimited("%s: netdev not found\n", __func__);
+		return -EINVAL;
+	}
 
-	offload_ctx = kzalloc(TLS_OFFLOAD_CONTEXT_SIZE_TX, GFP_KERNEL);
-	if (!offload_ctx) {
-		rc = -ENOMEM;
-		goto free_marker_record;
+	if (!(netdev->features & NETIF_F_HW_TLS_TX)) {
+		rc = -EOPNOTSUPP;
+		goto release_netdev;
 	}
 
 	crypto_info = &ctx->crypto_send.info;
 	if (crypto_info->version != TLS_1_2_VERSION) {
 		rc = -EOPNOTSUPP;
-		goto free_offload_ctx;
+		goto release_netdev;
 	}
 
 	switch (crypto_info->cipher_type) {
@@ -1057,13 +1058,13 @@ int tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
 		break;
 	default:
 		rc = -EINVAL;
-		goto free_offload_ctx;
+		goto release_netdev;
 	}
 
 	/* Sanity-check the rec_seq_size for stack allocations */
 	if (rec_seq_size > TLS_MAX_REC_SEQ_SIZE) {
 		rc = -EINVAL;
-		goto free_offload_ctx;
+		goto release_netdev;
 	}
 
 	prot->version = crypto_info->version;
@@ -1077,7 +1078,7 @@ int tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
 			     GFP_KERNEL);
 	if (!ctx->tx.iv) {
 		rc = -ENOMEM;
-		goto free_offload_ctx;
+		goto release_netdev;
 	}
 
 	memcpy(ctx->tx.iv + TLS_CIPHER_AES_GCM_128_SALT_SIZE, iv, iv_size);
@@ -1089,9 +1090,21 @@ int tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
 		goto free_iv;
 	}
 
+	start_marker_record = kmalloc(sizeof(*start_marker_record), GFP_KERNEL);
+	if (!start_marker_record) {
+		rc = -ENOMEM;
+		goto free_rec_seq;
+	}
+
+	offload_ctx = kzalloc(TLS_OFFLOAD_CONTEXT_SIZE_TX, GFP_KERNEL);
+	if (!offload_ctx) {
+		rc = -ENOMEM;
+		goto free_marker_record;
+	}
+
 	rc = tls_sw_fallback_init(sk, offload_ctx, crypto_info);
 	if (rc)
-		goto free_rec_seq;
+		goto free_offload_ctx;
 
 	/* start at rec_seq - 1 to account for the start marker record */
 	memcpy(&rcd_sn, ctx->tx.rec_seq, sizeof(rcd_sn));
@@ -1118,18 +1131,6 @@ int tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
 	if (skb)
 		TCP_SKB_CB(skb)->eor = 1;
 
-	netdev = get_netdev_for_sock(sk);
-	if (!netdev) {
-		pr_err_ratelimited("%s: netdev not found\n", __func__);
-		rc = -EINVAL;
-		goto disable_cad;
-	}
-
-	if (!(netdev->features & NETIF_F_HW_TLS_TX)) {
-		rc = -EOPNOTSUPP;
-		goto release_netdev;
-	}
-
 	/* Avoid offloading if the device is down
 	 * We don't want to offload new flows after
 	 * the NETDEV_DOWN event
@@ -1167,20 +1168,19 @@ int tls_set_device_offload(struct sock *sk, struct tls_context *ctx)
 
 release_lock:
 	up_read(&device_offload_lock);
-release_netdev:
-	dev_put(netdev);
-disable_cad:
 	clean_acked_data_disable(inet_csk(sk));
 	crypto_free_aead(offload_ctx->aead_send);
-free_rec_seq:
-	kfree(ctx->tx.rec_seq);
-free_iv:
-	kfree(ctx->tx.iv);
 free_offload_ctx:
 	kfree(offload_ctx);
 	ctx->priv_ctx_tx = NULL;
 free_marker_record:
 	kfree(start_marker_record);
+free_rec_seq:
+	kfree(ctx->tx.rec_seq);
+free_iv:
+	kfree(ctx->tx.iv);
+release_netdev:
+	dev_put(netdev);
 	return rc;
 }
 
diff --git a/net/tls/tls_main.c b/net/tls/tls_main.c
index 6bc2879ba637..7b2b0e7ffee4 100644
--- a/net/tls/tls_main.c
+++ b/net/tls/tls_main.c
@@ -553,10 +553,8 @@ static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval,
 	int rc = 0;
 	int conf;
 
-	if (sockptr_is_null(optval) || (optlen < sizeof(*crypto_info))) {
-		rc = -EINVAL;
-		goto out;
-	}
+	if (sockptr_is_null(optval) || (optlen < sizeof(*crypto_info)))
+		return -EINVAL;
 
 	if (tx) {
 		crypto_info = &ctx->crypto_send.info;
@@ -567,10 +565,8 @@ static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval,
 	}
 
 	/* Currently we don't support set crypto info more than one time */
-	if (TLS_CRYPTO_INFO_READY(crypto_info)) {
-		rc = -EBUSY;
-		goto out;
-	}
+	if (TLS_CRYPTO_INFO_READY(crypto_info))
+		return -EBUSY;
 
 	rc = copy_from_sockptr(crypto_info, optval, sizeof(*crypto_info));
 	if (rc) {
@@ -672,11 +668,10 @@ static int do_tls_setsockopt_conf(struct sock *sk, sockptr_t optval,
 		ctx->sk_write_space = sk->sk_write_space;
 		sk->sk_write_space = tls_write_space;
 	}
-	goto out;
+	return 0;
 
 err_crypto_info:
 	memzero_explicit(crypto_info, sizeof(union tls_crypto_context));
-out:
 	return rc;
 }
 
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index efc84845bb6b..0024a692f0f8 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -1433,7 +1433,8 @@ static int decrypt_internal(struct sock *sk, struct sk_buff *skb,
 
 	if (*zc && (out_iov || out_sg)) {
 		if (out_iov)
-			n_sgout = iov_iter_npages(out_iov, INT_MAX) + 1;
+			n_sgout = 1 +
+				iov_iter_npages_cap(out_iov, INT_MAX, data_len);
 		else
 			n_sgout = sg_nents(out_sg);
 		n_sgin = skb_nsg(skb, rxm->offset + prot->prepend_size,
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index c19569819866..e71a312faa1e 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -2049,7 +2049,7 @@ out:
  */
 #define UNIX_SKB_FRAGS_SZ (PAGE_SIZE << get_order(32768))
 
-#if (IS_ENABLED(CONFIG_AF_UNIX_OOB))
+#if IS_ENABLED(CONFIG_AF_UNIX_OOB)
 static int queue_oob(struct socket *sock, struct msghdr *msg, struct sock *other)
 {
 	struct unix_sock *ousk = unix_sk(other);
@@ -2084,7 +2084,7 @@ static int queue_oob(struct socket *sock, struct msghdr *msg, struct sock *other
 	if (ousk->oob_skb)
 		consume_skb(ousk->oob_skb);
 
-	ousk->oob_skb = skb;
+	WRITE_ONCE(ousk->oob_skb, skb);
 
 	scm_stat_add(other, skb);
 	skb_queue_tail(&other->sk_receive_queue, skb);
@@ -2115,7 +2115,7 @@ static int unix_stream_sendmsg(struct socket *sock, struct msghdr *msg,
 
 	err = -EOPNOTSUPP;
 	if (msg->msg_flags & MSG_OOB) {
-#if (IS_ENABLED(CONFIG_AF_UNIX_OOB))
+#if IS_ENABLED(CONFIG_AF_UNIX_OOB)
 		if (len)
 			len--;
 		else
@@ -2186,7 +2186,7 @@ static int unix_stream_sendmsg(struct socket *sock, struct msghdr *msg,
 		sent += size;
 	}
 
-#if (IS_ENABLED(CONFIG_AF_UNIX_OOB))
+#if IS_ENABLED(CONFIG_AF_UNIX_OOB)
 	if (msg->msg_flags & MSG_OOB) {
 		err = queue_oob(sock, msg, other);
 		if (err)
@@ -2602,9 +2602,8 @@ static int unix_stream_recv_urg(struct unix_stream_read_state *state)
 
 	oob_skb = u->oob_skb;
 
-	if (!(state->flags & MSG_PEEK)) {
-		u->oob_skb = NULL;
-	}
+	if (!(state->flags & MSG_PEEK))
+		WRITE_ONCE(u->oob_skb, NULL);
 
 	unix_state_unlock(sk);
 
@@ -2639,7 +2638,7 @@ static struct sk_buff *manage_oob(struct sk_buff *skb, struct sock *sk,
 				skb = NULL;
 			} else if (sock_flag(sk, SOCK_URGINLINE)) {
 				if (!(flags & MSG_PEEK)) {
-					u->oob_skb = NULL;
+					WRITE_ONCE(u->oob_skb, NULL);
 					consume_skb(skb);
 				}
 			} else if (!(flags & MSG_PEEK)) {
@@ -3094,11 +3093,10 @@ static int unix_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 	case SIOCATMARK:
 		{
 			struct sk_buff *skb;
-			struct unix_sock *u = unix_sk(sk);
 			int answ = 0;
 
 			skb = skb_peek(&sk->sk_receive_queue);
-			if (skb && skb == u->oob_skb)
+			if (skb && skb == READ_ONCE(unix_sk(sk)->oob_skb))
 				answ = 1;
 			err = put_user(answ, (int __user *)arg);
 		}
@@ -3139,6 +3137,10 @@ static __poll_t unix_poll(struct file *file, struct socket *sock, poll_table *wa
 		mask |= EPOLLIN | EPOLLRDNORM;
 	if (sk_is_readable(sk))
 		mask |= EPOLLIN | EPOLLRDNORM;
+#if IS_ENABLED(CONFIG_AF_UNIX_OOB)
+	if (READ_ONCE(unix_sk(sk)->oob_skb))
+		mask |= EPOLLPRI;
+#endif
 
 	/* Connection-based need to check for termination and startup */
 	if ((sk->sk_type == SOCK_STREAM || sk->sk_type == SOCK_SEQPACKET) &&
@@ -3240,49 +3242,58 @@ static struct sock *unix_from_bucket(struct seq_file *seq, loff_t *pos)
 	return sk;
 }
 
-static struct sock *unix_next_socket(struct seq_file *seq,
-				     struct sock *sk,
-				     loff_t *pos)
+static struct sock *unix_get_first(struct seq_file *seq, loff_t *pos)
 {
 	unsigned long bucket = get_bucket(*pos);
+	struct sock *sk;
 
-	while (sk > (struct sock *)SEQ_START_TOKEN) {
-		sk = sk_next(sk);
-		if (!sk)
-			goto next_bucket;
-		if (sock_net(sk) == seq_file_net(seq))
-			return sk;
-	}
-
-	do {
+	while (bucket < ARRAY_SIZE(unix_socket_table)) {
 		spin_lock(&unix_table_locks[bucket]);
+
 		sk = unix_from_bucket(seq, pos);
 		if (sk)
 			return sk;
 
-next_bucket:
-		spin_unlock(&unix_table_locks[bucket++]);
-		*pos = set_bucket_offset(bucket, 1);
-	} while (bucket < ARRAY_SIZE(unix_socket_table));
+		spin_unlock(&unix_table_locks[bucket]);
+
+		*pos = set_bucket_offset(++bucket, 1);
+	}
 
 	return NULL;
 }
 
+static struct sock *unix_get_next(struct seq_file *seq, struct sock *sk,
+				  loff_t *pos)
+{
+	unsigned long bucket = get_bucket(*pos);
+
+	for (sk = sk_next(sk); sk; sk = sk_next(sk))
+		if (sock_net(sk) == seq_file_net(seq))
+			return sk;
+
+	spin_unlock(&unix_table_locks[bucket]);
+
+	*pos = set_bucket_offset(++bucket, 1);
+
+	return unix_get_first(seq, pos);
+}
+
 static void *unix_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	if (!*pos)
 		return SEQ_START_TOKEN;
 
-	if (get_bucket(*pos) >= ARRAY_SIZE(unix_socket_table))
-		return NULL;
-
-	return unix_next_socket(seq, NULL, pos);
+	return unix_get_first(seq, pos);
 }
 
 static void *unix_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 {
 	++*pos;
-	return unix_next_socket(seq, v, pos);
+
+	if (v == SEQ_START_TOKEN)
+		return unix_get_first(seq, pos);
+
+	return unix_get_next(seq, v, pos);
 }
 
 static void unix_seq_stop(struct seq_file *seq, void *v)
@@ -3347,6 +3358,15 @@ static const struct seq_operations unix_seq_ops = {
 };
 
 #if IS_BUILTIN(CONFIG_UNIX) && defined(CONFIG_BPF_SYSCALL)
+struct bpf_unix_iter_state {
+	struct seq_net_private p;
+	unsigned int cur_sk;
+	unsigned int end_sk;
+	unsigned int max_sk;
+	struct sock **batch;
+	bool st_bucket_done;
+};
+
 struct bpf_iter__unix {
 	__bpf_md_ptr(struct bpf_iter_meta *, meta);
 	__bpf_md_ptr(struct unix_sock *, unix_sk);
@@ -3365,24 +3385,156 @@ static int unix_prog_seq_show(struct bpf_prog *prog, struct bpf_iter_meta *meta,
 	return bpf_iter_run_prog(prog, &ctx);
 }
 
+static int bpf_iter_unix_hold_batch(struct seq_file *seq, struct sock *start_sk)
+
+{
+	struct bpf_unix_iter_state *iter = seq->private;
+	unsigned int expected = 1;
+	struct sock *sk;
+
+	sock_hold(start_sk);
+	iter->batch[iter->end_sk++] = start_sk;
+
+	for (sk = sk_next(start_sk); sk; sk = sk_next(sk)) {
+		if (sock_net(sk) != seq_file_net(seq))
+			continue;
+
+		if (iter->end_sk < iter->max_sk) {
+			sock_hold(sk);
+			iter->batch[iter->end_sk++] = sk;
+		}
+
+		expected++;
+	}
+
+	spin_unlock(&unix_table_locks[start_sk->sk_hash]);
+
+	return expected;
+}
+
+static void bpf_iter_unix_put_batch(struct bpf_unix_iter_state *iter)
+{
+	while (iter->cur_sk < iter->end_sk)
+		sock_put(iter->batch[iter->cur_sk++]);
+}
+
+static int bpf_iter_unix_realloc_batch(struct bpf_unix_iter_state *iter,
+				       unsigned int new_batch_sz)
+{
+	struct sock **new_batch;
+
+	new_batch = kvmalloc(sizeof(*new_batch) * new_batch_sz,
+			     GFP_USER | __GFP_NOWARN);
+	if (!new_batch)
+		return -ENOMEM;
+
+	bpf_iter_unix_put_batch(iter);
+	kvfree(iter->batch);
+	iter->batch = new_batch;
+	iter->max_sk = new_batch_sz;
+
+	return 0;
+}
+
+static struct sock *bpf_iter_unix_batch(struct seq_file *seq,
+					loff_t *pos)
+{
+	struct bpf_unix_iter_state *iter = seq->private;
+	unsigned int expected;
+	bool resized = false;
+	struct sock *sk;
+
+	if (iter->st_bucket_done)
+		*pos = set_bucket_offset(get_bucket(*pos) + 1, 1);
+
+again:
+	/* Get a new batch */
+	iter->cur_sk = 0;
+	iter->end_sk = 0;
+
+	sk = unix_get_first(seq, pos);
+	if (!sk)
+		return NULL; /* Done */
+
+	expected = bpf_iter_unix_hold_batch(seq, sk);
+
+	if (iter->end_sk == expected) {
+		iter->st_bucket_done = true;
+		return sk;
+	}
+
+	if (!resized && !bpf_iter_unix_realloc_batch(iter, expected * 3 / 2)) {
+		resized = true;
+		goto again;
+	}
+
+	return sk;
+}
+
+static void *bpf_iter_unix_seq_start(struct seq_file *seq, loff_t *pos)
+{
+	if (!*pos)
+		return SEQ_START_TOKEN;
+
+	/* bpf iter does not support lseek, so it always
+	 * continue from where it was stop()-ped.
+	 */
+	return bpf_iter_unix_batch(seq, pos);
+}
+
+static void *bpf_iter_unix_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+	struct bpf_unix_iter_state *iter = seq->private;
+	struct sock *sk;
+
+	/* Whenever seq_next() is called, the iter->cur_sk is
+	 * done with seq_show(), so advance to the next sk in
+	 * the batch.
+	 */
+	if (iter->cur_sk < iter->end_sk)
+		sock_put(iter->batch[iter->cur_sk++]);
+
+	++*pos;
+
+	if (iter->cur_sk < iter->end_sk)
+		sk = iter->batch[iter->cur_sk];
+	else
+		sk = bpf_iter_unix_batch(seq, pos);
+
+	return sk;
+}
+
 static int bpf_iter_unix_seq_show(struct seq_file *seq, void *v)
 {
 	struct bpf_iter_meta meta;
 	struct bpf_prog *prog;
 	struct sock *sk = v;
 	uid_t uid;
+	bool slow;
+	int ret;
 
 	if (v == SEQ_START_TOKEN)
 		return 0;
 
+	slow = lock_sock_fast(sk);
+
+	if (unlikely(sk_unhashed(sk))) {
+		ret = SEQ_SKIP;
+		goto unlock;
+	}
+
 	uid = from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk));
 	meta.seq = seq;
 	prog = bpf_iter_get_info(&meta, false);
-	return unix_prog_seq_show(prog, &meta, v, uid);
+	ret = unix_prog_seq_show(prog, &meta, v, uid);
+unlock:
+	unlock_sock_fast(sk, slow);
+	return ret;
 }
 
 static void bpf_iter_unix_seq_stop(struct seq_file *seq, void *v)
 {
+	struct bpf_unix_iter_state *iter = seq->private;
 	struct bpf_iter_meta meta;
 	struct bpf_prog *prog;
 
@@ -3393,12 +3545,13 @@ static void bpf_iter_unix_seq_stop(struct seq_file *seq, void *v)
 			(void)unix_prog_seq_show(prog, &meta, v, 0);
 	}
 
-	unix_seq_stop(seq, v);
+	if (iter->cur_sk < iter->end_sk)
+		bpf_iter_unix_put_batch(iter);
 }
 
 static const struct seq_operations bpf_iter_unix_seq_ops = {
-	.start	= unix_seq_start,
-	.next	= unix_seq_next,
+	.start	= bpf_iter_unix_seq_start,
+	.next	= bpf_iter_unix_seq_next,
 	.stop	= bpf_iter_unix_seq_stop,
 	.show	= bpf_iter_unix_seq_show,
 };
@@ -3447,13 +3600,55 @@ static struct pernet_operations unix_net_ops = {
 DEFINE_BPF_ITER_FUNC(unix, struct bpf_iter_meta *meta,
 		     struct unix_sock *unix_sk, uid_t uid)
 
+#define INIT_BATCH_SZ 16
+
+static int bpf_iter_init_unix(void *priv_data, struct bpf_iter_aux_info *aux)
+{
+	struct bpf_unix_iter_state *iter = priv_data;
+	int err;
+
+	err = bpf_iter_init_seq_net(priv_data, aux);
+	if (err)
+		return err;
+
+	err = bpf_iter_unix_realloc_batch(iter, INIT_BATCH_SZ);
+	if (err) {
+		bpf_iter_fini_seq_net(priv_data);
+		return err;
+	}
+
+	return 0;
+}
+
+static void bpf_iter_fini_unix(void *priv_data)
+{
+	struct bpf_unix_iter_state *iter = priv_data;
+
+	bpf_iter_fini_seq_net(priv_data);
+	kvfree(iter->batch);
+}
+
 static const struct bpf_iter_seq_info unix_seq_info = {
 	.seq_ops		= &bpf_iter_unix_seq_ops,
-	.init_seq_private	= bpf_iter_init_seq_net,
-	.fini_seq_private	= bpf_iter_fini_seq_net,
-	.seq_priv_size		= sizeof(struct seq_net_private),
+	.init_seq_private	= bpf_iter_init_unix,
+	.fini_seq_private	= bpf_iter_fini_unix,
+	.seq_priv_size		= sizeof(struct bpf_unix_iter_state),
 };
 
+static const struct bpf_func_proto *
+bpf_iter_unix_get_func_proto(enum bpf_func_id func_id,
+			     const struct bpf_prog *prog)
+{
+	switch (func_id) {
+	case BPF_FUNC_setsockopt:
+		return &bpf_sk_setsockopt_proto;
+	case BPF_FUNC_getsockopt:
+		return &bpf_sk_getsockopt_proto;
+	default:
+		return NULL;
+	}
+}
+
 static struct bpf_iter_reg unix_reg_info = {
 	.target			= "unix",
 	.ctx_arg_info_size	= 1,
@@ -3461,6 +3656,7 @@ static struct bpf_iter_reg unix_reg_info = {
 		{ offsetof(struct bpf_iter__unix, unix_sk),
 		  PTR_TO_BTF_ID_OR_NULL },
 	},
+	.get_func_proto         = bpf_iter_unix_get_func_proto,
 	.seq_info		= &unix_seq_info,
 };
 
diff --git a/net/wireless/chan.c b/net/wireless/chan.c
index eb822052d344..8b7fb4a9e07b 100644
--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -181,6 +181,9 @@ static int nl80211_chan_width_to_mhz(enum nl80211_chan_width chan_width)
 	case NL80211_CHAN_WIDTH_160:
 		mhz = 160;
 		break;
+	case NL80211_CHAN_WIDTH_320:
+		mhz = 320;
+		break;
 	default:
 		WARN_ON_ONCE(1);
 		return -1;
@@ -271,6 +274,17 @@ bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef)
 	case NL80211_CHAN_WIDTH_16:
 		/* all checked above */
 		break;
+	case NL80211_CHAN_WIDTH_320:
+		if (chandef->center_freq1 == control_freq + 150 ||
+		    chandef->center_freq1 == control_freq + 130 ||
+		    chandef->center_freq1 == control_freq + 110 ||
+		    chandef->center_freq1 == control_freq + 90 ||
+		    chandef->center_freq1 == control_freq - 90 ||
+		    chandef->center_freq1 == control_freq - 110 ||
+		    chandef->center_freq1 == control_freq - 130 ||
+		    chandef->center_freq1 == control_freq - 150)
+			break;
+		fallthrough;
 	case NL80211_CHAN_WIDTH_160:
 		if (chandef->center_freq1 == control_freq + 70 ||
 		    chandef->center_freq1 == control_freq + 50 ||
@@ -307,7 +321,7 @@ bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef)
 EXPORT_SYMBOL(cfg80211_chandef_valid);
 
 static void chandef_primary_freqs(const struct cfg80211_chan_def *c,
-				  u32 *pri40, u32 *pri80)
+				  u32 *pri40, u32 *pri80, u32 *pri160)
 {
 	int tmp;
 
@@ -315,9 +329,11 @@ static void chandef_primary_freqs(const struct cfg80211_chan_def *c,
 	case NL80211_CHAN_WIDTH_40:
 		*pri40 = c->center_freq1;
 		*pri80 = 0;
+		*pri160 = 0;
 		break;
 	case NL80211_CHAN_WIDTH_80:
 	case NL80211_CHAN_WIDTH_80P80:
+		*pri160 = 0;
 		*pri80 = c->center_freq1;
 		/* n_P20 */
 		tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
@@ -327,6 +343,7 @@ static void chandef_primary_freqs(const struct cfg80211_chan_def *c,
 		*pri40 = c->center_freq1 - 20 + 40 * tmp;
 		break;
 	case NL80211_CHAN_WIDTH_160:
+		*pri160 = c->center_freq1;
 		/* n_P20 */
 		tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
 		/* n_P40 */
@@ -337,6 +354,20 @@ static void chandef_primary_freqs(const struct cfg80211_chan_def *c,
 		tmp /= 2;
 		*pri80 = c->center_freq1 - 40 + 80 * tmp;
 		break;
+	case NL80211_CHAN_WIDTH_320:
+		/* n_P20 */
+		tmp = (150 + c->chan->center_freq - c->center_freq1) / 20;
+		/* n_P40 */
+		tmp /= 2;
+		/* freq_P40 */
+		*pri40 = c->center_freq1 - 140 + 40 * tmp;
+		/* n_P80 */
+		tmp /= 2;
+		*pri80 = c->center_freq1 - 120 + 80 * tmp;
+		/* n_P160 */
+		tmp /= 2;
+		*pri160 = c->center_freq1 - 80 + 160 * tmp;
+		break;
 	default:
 		WARN_ON_ONCE(1);
 	}
@@ -346,7 +377,7 @@ const struct cfg80211_chan_def *
 cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1,
 			    const struct cfg80211_chan_def *c2)
 {
-	u32 c1_pri40, c1_pri80, c2_pri40, c2_pri80;
+	u32 c1_pri40, c1_pri80, c2_pri40, c2_pri80, c1_pri160, c2_pri160;
 
 	/* If they are identical, return */
 	if (cfg80211_chandef_identical(c1, c2))
@@ -381,14 +412,31 @@ cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1,
 	    c2->width == NL80211_CHAN_WIDTH_20)
 		return c1;
 
-	chandef_primary_freqs(c1, &c1_pri40, &c1_pri80);
-	chandef_primary_freqs(c2, &c2_pri40, &c2_pri80);
+	chandef_primary_freqs(c1, &c1_pri40, &c1_pri80, &c1_pri160);
+	chandef_primary_freqs(c2, &c2_pri40, &c2_pri80, &c2_pri160);
 
 	if (c1_pri40 != c2_pri40)
 		return NULL;
 
-	WARN_ON(!c1_pri80 && !c2_pri80);
-	if (c1_pri80 && c2_pri80 && c1_pri80 != c2_pri80)
+	if (c1->width == NL80211_CHAN_WIDTH_40)
+		return c2;
+
+	if (c2->width == NL80211_CHAN_WIDTH_40)
+		return c1;
+
+	if (c1_pri80 != c2_pri80)
+		return NULL;
+
+	if (c1->width == NL80211_CHAN_WIDTH_80 &&
+	    c2->width > NL80211_CHAN_WIDTH_80)
+		return c2;
+
+	if (c2->width == NL80211_CHAN_WIDTH_80 &&
+	    c1->width > NL80211_CHAN_WIDTH_80)
+		return c1;
+
+	WARN_ON(!c1_pri160 && !c2_pri160);
+	if (c1_pri160 && c2_pri160 && c1_pri160 != c2_pri160)
 		return NULL;
 
 	if (c1->width > c2->width)
@@ -960,7 +1008,10 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy,
 	struct ieee80211_sta_vht_cap *vht_cap;
 	struct ieee80211_edmg *edmg_cap;
 	u32 width, control_freq, cap;
-	bool ext_nss_cap, support_80_80 = false;
+	bool ext_nss_cap, support_80_80 = false, support_320 = false;
+	const struct ieee80211_sband_iftype_data *iftd;
+	struct ieee80211_supported_band *sband;
+	int i;
 
 	if (WARN_ON(!cfg80211_chandef_valid(chandef)))
 		return false;
@@ -1062,6 +1113,32 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy,
 		      (vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)))
 			return false;
 		break;
+	case NL80211_CHAN_WIDTH_320:
+		prohibited_flags |= IEEE80211_CHAN_NO_320MHZ;
+		width = 320;
+
+		if (chandef->chan->band != NL80211_BAND_6GHZ)
+			return false;
+
+		sband = wiphy->bands[NL80211_BAND_6GHZ];
+		if (!sband)
+			return false;
+
+		for (i = 0; i < sband->n_iftype_data; i++) {
+			iftd = &sband->iftype_data[i];
+			if (!iftd->eht_cap.has_eht)
+				continue;
+
+			if (iftd->eht_cap.eht_cap_elem.phy_cap_info[0] &
+			    IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) {
+				support_320 = true;
+				break;
+			}
+		}
+
+		if (!support_320)
+			return false;
+		break;
 	default:
 		WARN_ON_ONCE(1);
 		return false;
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index c01fbcc848e8..ee1c2b6b6971 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -5,7 +5,7 @@
  * Copyright 2006-2010	Johannes Berg <johannes@sipsolutions.net>
  * Copyright 2013-2014  Intel Mobile Communications GmbH
  * Copyright 2015-2017	Intel Deutschland GmbH
- * Copyright (C) 2018-2021 Intel Corporation
+ * Copyright (C) 2018-2022 Intel Corporation
  */
 
 #include <linux/if.h>
@@ -285,6 +285,15 @@ static int validate_ie_attr(const struct nlattr *attr,
 	return -EINVAL;
 }
 
+static int validate_he_capa(const struct nlattr *attr,
+			    struct netlink_ext_ack *extack)
+{
+	if (!ieee80211_he_capa_size_ok(nla_data(attr), nla_len(attr)))
+		return -EINVAL;
+
+	return 0;
+}
+
 /* policy for the attributes */
 static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR];
 
@@ -730,9 +739,8 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 	[NL80211_ATTR_TXQ_MEMORY_LIMIT] = { .type = NLA_U32 },
 	[NL80211_ATTR_TXQ_QUANTUM] = { .type = NLA_U32 },
 	[NL80211_ATTR_HE_CAPABILITY] =
-		NLA_POLICY_RANGE(NLA_BINARY,
-				 NL80211_HE_MIN_CAPABILITY_LEN,
-				 NL80211_HE_MAX_CAPABILITY_LEN),
+		NLA_POLICY_VALIDATE_FN(NLA_BINARY, validate_he_capa,
+				       NL80211_HE_MAX_CAPABILITY_LEN),
 	[NL80211_ATTR_FTM_RESPONDER] =
 		NLA_POLICY_NESTED(nl80211_ftm_responder_policy),
 	[NL80211_ATTR_TIMEOUT] = NLA_POLICY_MIN(NLA_U32, 1),
@@ -778,6 +786,10 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 	[NL80211_ATTR_MBSSID_ELEMS] = { .type = NLA_NESTED },
 	[NL80211_ATTR_RADAR_BACKGROUND] = { .type = NLA_FLAG },
 	[NL80211_ATTR_AP_SETTINGS_FLAGS] = { .type = NLA_U32 },
+	[NL80211_ATTR_EHT_CAPABILITY] =
+		NLA_POLICY_RANGE(NLA_BINARY,
+				 NL80211_EHT_MIN_CAPABILITY_LEN,
+				 NL80211_EHT_MAX_CAPABILITY_LEN),
 };
 
 /* policy for the key attributes */
@@ -1148,6 +1160,12 @@ static int nl80211_msg_put_channel(struct sk_buff *msg, struct wiphy *wiphy,
 		if ((chan->flags & IEEE80211_CHAN_16MHZ) &&
 		    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_16MHZ))
 			goto nla_put_failure;
+		if ((chan->flags & IEEE80211_CHAN_NO_320MHZ) &&
+		    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_320MHZ))
+			goto nla_put_failure;
+		if ((chan->flags & IEEE80211_CHAN_NO_EHT) &&
+		    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_EHT))
+			goto nla_put_failure;
 	}
 
 	if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
@@ -1729,6 +1747,7 @@ nl80211_send_iftype_data(struct sk_buff *msg,
 			 const struct ieee80211_sband_iftype_data *iftdata)
 {
 	const struct ieee80211_sta_he_cap *he_cap = &iftdata->he_cap;
+	const struct ieee80211_sta_eht_cap *eht_cap = &iftdata->eht_cap;
 
 	if (nl80211_put_iftypes(msg, NL80211_BAND_IFTYPE_ATTR_IFTYPES,
 				iftdata->types_mask))
@@ -1749,6 +1768,32 @@ nl80211_send_iftype_data(struct sk_buff *msg,
 			return -ENOBUFS;
 	}
 
+	if (eht_cap->has_eht && he_cap->has_he) {
+		u8 mcs_nss_size, ppe_thresh_size;
+		u16 ppe_thres_hdr;
+
+		mcs_nss_size =
+			ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
+						   &eht_cap->eht_cap_elem);
+
+		ppe_thres_hdr = get_unaligned_le16(&eht_cap->eht_ppe_thres[0]);
+		ppe_thresh_size =
+			ieee80211_eht_ppe_size(ppe_thres_hdr,
+					       eht_cap->eht_cap_elem.phy_cap_info);
+
+		if (nla_put(msg, NL80211_BAND_IFTYPE_ATTR_EHT_CAP_MAC,
+			    sizeof(eht_cap->eht_cap_elem.mac_cap_info),
+			    eht_cap->eht_cap_elem.mac_cap_info) ||
+		    nla_put(msg, NL80211_BAND_IFTYPE_ATTR_EHT_CAP_PHY,
+			    sizeof(eht_cap->eht_cap_elem.phy_cap_info),
+			    eht_cap->eht_cap_elem.phy_cap_info) ||
+		    nla_put(msg, NL80211_BAND_IFTYPE_ATTR_EHT_CAP_MCS_SET,
+			    mcs_nss_size, &eht_cap->eht_mcs_nss_supp) ||
+		    nla_put(msg, NL80211_BAND_IFTYPE_ATTR_EHT_CAP_PPE,
+			    ppe_thresh_size, eht_cap->eht_ppe_thres))
+			return -ENOBUFS;
+	}
+
 	if (sband->band == NL80211_BAND_6GHZ &&
 	    nla_put(msg, NL80211_BAND_IFTYPE_ATTR_HE_6GHZ_CAPA,
 		    sizeof(iftdata->he_6ghz_capa),
@@ -5919,6 +5964,14 @@ bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info, int attr)
 	case RATE_INFO_BW_HE_RU:
 		rate_flg = 0;
 		WARN_ON(!(info->flags & RATE_INFO_FLAGS_HE_MCS));
+		break;
+	case RATE_INFO_BW_320:
+		rate_flg = NL80211_RATE_INFO_320_MHZ_WIDTH;
+		break;
+	case RATE_INFO_BW_EHT_RU:
+		rate_flg = 0;
+		WARN_ON(!(info->flags & RATE_INFO_FLAGS_EHT_MCS));
+		break;
 	}
 
 	if (rate_flg && nla_put_flag(msg, rate_flg))
@@ -5951,6 +6004,17 @@ bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info, int attr)
 		    nla_put_u8(msg, NL80211_RATE_INFO_HE_RU_ALLOC,
 			       info->he_ru_alloc))
 			return false;
+	} else if (info->flags & RATE_INFO_FLAGS_EHT_MCS) {
+		if (nla_put_u8(msg, NL80211_RATE_INFO_EHT_MCS, info->mcs))
+			return false;
+		if (nla_put_u8(msg, NL80211_RATE_INFO_EHT_NSS, info->nss))
+			return false;
+		if (nla_put_u8(msg, NL80211_RATE_INFO_EHT_GI, info->eht_gi))
+			return false;
+		if (info->bw == RATE_INFO_BW_EHT_RU &&
+		    nla_put_u8(msg, NL80211_RATE_INFO_EHT_RU_ALLOC,
+			       info->eht_ru_alloc))
+			return false;
 	}
 
 	nla_nest_end(msg, rate);
@@ -6365,7 +6429,7 @@ int cfg80211_check_station_change(struct wiphy *wiphy,
 		if (params->supported_rates)
 			return -EINVAL;
 		if (params->ext_capab || params->ht_capa || params->vht_capa ||
-		    params->he_capa)
+		    params->he_capa || params->eht_capa)
 			return -EINVAL;
 	}
 
@@ -6568,6 +6632,18 @@ static int nl80211_set_station_tdls(struct genl_info *info,
 			nla_data(info->attrs[NL80211_ATTR_HE_CAPABILITY]);
 		params->he_capa_len =
 			nla_len(info->attrs[NL80211_ATTR_HE_CAPABILITY]);
+
+		if (info->attrs[NL80211_ATTR_EHT_CAPABILITY]) {
+			params->eht_capa =
+				nla_data(info->attrs[NL80211_ATTR_EHT_CAPABILITY]);
+			params->eht_capa_len =
+				nla_len(info->attrs[NL80211_ATTR_EHT_CAPABILITY]);
+
+			if (!ieee80211_eht_capa_size_ok((const u8 *)params->he_capa,
+							(const u8 *)params->eht_capa,
+							params->eht_capa_len))
+				return -EINVAL;
+		}
 	}
 
 	err = nl80211_parse_sta_channel_info(info, params);
@@ -6825,6 +6901,18 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
 			nla_data(info->attrs[NL80211_ATTR_HE_CAPABILITY]);
 		params.he_capa_len =
 			nla_len(info->attrs[NL80211_ATTR_HE_CAPABILITY]);
+
+		if (info->attrs[NL80211_ATTR_EHT_CAPABILITY]) {
+			params.eht_capa =
+				nla_data(info->attrs[NL80211_ATTR_EHT_CAPABILITY]);
+			params.eht_capa_len =
+				nla_len(info->attrs[NL80211_ATTR_EHT_CAPABILITY]);
+
+			if (!ieee80211_eht_capa_size_ok((const u8 *)params.he_capa,
+							(const u8 *)params.eht_capa,
+							params.eht_capa_len))
+				return -EINVAL;
+		}
 	}
 
 	if (info->attrs[NL80211_ATTR_HE_6GHZ_CAPABILITY])
@@ -6874,8 +6962,9 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
 		params.ht_capa = NULL;
 		params.vht_capa = NULL;
 
-		/* HE requires WME */
-		if (params.he_capa_len || params.he_6ghz_capa)
+		/* HE and EHT require WME */
+		if (params.he_capa_len || params.he_6ghz_capa ||
+		    params.eht_capa_len)
 			return -EINVAL;
 	}
 
@@ -7948,6 +8037,7 @@ static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
 	struct cfg80211_registered_device *rdev;
 	struct wiphy *wiphy = NULL;
 	struct sk_buff *msg;
+	int err = -EMSGSIZE;
 	void *hdr;
 
 	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
@@ -7966,34 +8056,35 @@ static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
 
 		rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
 		if (IS_ERR(rdev)) {
-			nlmsg_free(msg);
-			rtnl_unlock();
-			return PTR_ERR(rdev);
+			err = PTR_ERR(rdev);
+			goto nla_put_failure;
 		}
 
 		wiphy = &rdev->wiphy;
 		self_managed = wiphy->regulatory_flags &
 			       REGULATORY_WIPHY_SELF_MANAGED;
+
+		rcu_read_lock();
+
 		regdom = get_wiphy_regdom(wiphy);
 
 		/* a self-managed-reg device must have a private regdom */
 		if (WARN_ON(!regdom && self_managed)) {
-			nlmsg_free(msg);
-			rtnl_unlock();
-			return -EINVAL;
+			err = -EINVAL;
+			goto nla_put_failure_rcu;
 		}
 
 		if (regdom &&
 		    nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
-			goto nla_put_failure;
+			goto nla_put_failure_rcu;
+	} else {
+		rcu_read_lock();
 	}
 
 	if (!wiphy && reg_last_request_cell_base() &&
 	    nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
 			NL80211_USER_REG_HINT_CELL_BASE))
-		goto nla_put_failure;
-
-	rcu_read_lock();
+		goto nla_put_failure_rcu;
 
 	if (!regdom)
 		regdom = rcu_dereference(cfg80211_regdomain);
@@ -8013,7 +8104,7 @@ nla_put_failure:
 	rtnl_unlock();
 put_failure:
 	nlmsg_free(msg);
-	return -EMSGSIZE;
+	return err;
 }
 
 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
@@ -8059,19 +8150,19 @@ static int nl80211_get_reg_dump(struct sk_buff *skb,
 	struct cfg80211_registered_device *rdev;
 	int err, reg_idx, start = cb->args[2];
 
-	rtnl_lock();
+	rcu_read_lock();
 
 	if (cfg80211_regdomain && start == 0) {
 		err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
 					  NLM_F_MULTI, NULL,
-					  rtnl_dereference(cfg80211_regdomain));
+					  rcu_dereference(cfg80211_regdomain));
 		if (err < 0)
 			goto out_err;
 	}
 
 	/* the global regdom is idx 0 */
 	reg_idx = 1;
-	list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
+	list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
 		regdom = get_wiphy_regdom(&rdev->wiphy);
 		if (!regdom)
 			continue;
@@ -8090,7 +8181,7 @@ static int nl80211_get_reg_dump(struct sk_buff *skb,
 	cb->args[2] = reg_idx;
 	err = skb->len;
 out_err:
-	rtnl_unlock();
+	rcu_read_unlock();
 	return err;
 }
 
@@ -10552,6 +10643,8 @@ static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
 					     NL80211_EXT_FEATURE_VHT_IBSS))
 			return -EINVAL;
 		break;
+	case NL80211_CHAN_WIDTH_320:
+		return -EINVAL;
 	default:
 		return -EINVAL;
 	}
diff --git a/net/wireless/pmsr.c b/net/wireless/pmsr.c
index 328cf54bda82..2bc647720cda 100644
--- a/net/wireless/pmsr.c
+++ b/net/wireless/pmsr.c
@@ -2,8 +2,6 @@
 /*
  * Copyright (C) 2018 - 2021 Intel Corporation
  */
-#ifndef __PMSR_H
-#define __PMSR_H
 #include <net/cfg80211.h>
 #include "core.h"
 #include "nl80211.h"
@@ -661,5 +659,3 @@ void cfg80211_release_pmsr(struct wireless_dev *wdev, u32 portid)
 	}
 	spin_unlock_bh(&wdev->pmsr_lock);
 }
-
-#endif /* __PMSR_H */
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index ec25924a1c26..c76cd973f06e 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -1238,6 +1238,8 @@ unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
 {
 	unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
 
+	if (rule->flags & NL80211_RRF_NO_320MHZ)
+		bw = min_t(unsigned int, bw, MHZ_TO_KHZ(160));
 	if (rule->flags & NL80211_RRF_NO_160MHZ)
 		bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
 	if (rule->flags & NL80211_RRF_NO_80MHZ)
@@ -1611,6 +1613,8 @@ static u32 map_regdom_flags(u32 rd_flags)
 		channel_flags |= IEEE80211_CHAN_NO_160MHZ;
 	if (rd_flags & NL80211_RRF_NO_HE)
 		channel_flags |= IEEE80211_CHAN_NO_HE;
+	if (rd_flags & NL80211_RRF_NO_320MHZ)
+		channel_flags |= IEEE80211_CHAN_NO_320MHZ;
 	return channel_flags;
 }
 
@@ -1773,6 +1777,8 @@ static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd
 			bw_flags |= IEEE80211_CHAN_NO_80MHZ;
 		if (max_bandwidth_khz < MHZ_TO_KHZ(160))
 			bw_flags |= IEEE80211_CHAN_NO_160MHZ;
+		if (max_bandwidth_khz < MHZ_TO_KHZ(320))
+			bw_flags |= IEEE80211_CHAN_NO_320MHZ;
 	}
 	return bw_flags;
 }
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index b888522f133b..b2fdac96bab0 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -700,8 +700,12 @@ static bool cfg80211_find_ssid_match(struct cfg80211_colocated_ap *ap,
 
 	for (i = 0; i < request->n_ssids; i++) {
 		/* wildcard ssid in the scan request */
-		if (!request->ssids[i].ssid_len)
+		if (!request->ssids[i].ssid_len) {
+			if (ap->multi_bss && !ap->transmitted_bssid)
+				continue;
+
 			return true;
+		}
 
 		if (ap->ssid_len &&
 		    ap->ssid_len == request->ssids[i].ssid_len) {
@@ -827,6 +831,9 @@ static int cfg80211_scan_6ghz(struct cfg80211_registered_device *rdev)
 		    !cfg80211_find_ssid_match(ap, request))
 			continue;
 
+		if (!request->n_ssids && ap->multi_bss && !ap->transmitted_bssid)
+			continue;
+
 		cfg80211_scan_req_add_chan(request, chan, true);
 		memcpy(scan_6ghz_params->bssid, ap->bssid, ETH_ALEN);
 		scan_6ghz_params->short_ssid = ap->short_ssid;
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 41ea65deb6e1..a60d7d638e72 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -5,7 +5,7 @@
  * Copyright 2007-2009	Johannes Berg <johannes@sipsolutions.net>
  * Copyright 2013-2014  Intel Mobile Communications GmbH
  * Copyright 2017	Intel Deutschland GmbH
- * Copyright (C) 2018-2020 Intel Corporation
+ * Copyright (C) 2018-2021 Intel Corporation
  */
 #include <linux/export.h>
 #include <linux/bitops.h>
@@ -634,12 +634,14 @@ int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr,
 	if (likely((!is_amsdu && ether_addr_equal(payload.hdr, rfc1042_header) &&
 		    tmp.h_proto != htons(ETH_P_AARP) &&
 		    tmp.h_proto != htons(ETH_P_IPX)) ||
-		   ether_addr_equal(payload.hdr, bridge_tunnel_header)))
+		   ether_addr_equal(payload.hdr, bridge_tunnel_header))) {
 		/* remove RFC1042 or Bridge-Tunnel encapsulation and
 		 * replace EtherType */
 		hdrlen += ETH_ALEN + 2;
-	else
+		skb_postpull_rcsum(skb, &payload, ETH_ALEN + 2);
+	} else {
 		tmp.h_proto = htons(skb->len - hdrlen);
+	}
 
 	pskb_pull(skb, hdrlen);
 
@@ -1428,6 +1430,135 @@ static u32 cfg80211_calculate_bitrate_he(struct rate_info *rate)
 	return result / 10000;
 }
 
+static u32 cfg80211_calculate_bitrate_eht(struct rate_info *rate)
+{
+#define SCALE 6144
+	static const u32 mcs_divisors[16] = {
+		102399, /* 16.666666... */
+		 51201, /*  8.333333... */
+		 34134, /*  5.555555... */
+		 25599, /*  4.166666... */
+		 17067, /*  2.777777... */
+		 12801, /*  2.083333... */
+		 11769, /*  1.851851... */
+		 10239, /*  1.666666... */
+		  8532, /*  1.388888... */
+		  7680, /*  1.250000... */
+		  6828, /*  1.111111... */
+		  6144, /*  1.000000... */
+		  5690, /*  0.926106... */
+		  5120, /*  0.833333... */
+		409600, /* 66.666666... */
+		204800, /* 33.333333... */
+	};
+	static const u32 rates_996[3] =  { 480388888, 453700000, 408333333 };
+	static const u32 rates_484[3] =  { 229411111, 216666666, 195000000 };
+	static const u32 rates_242[3] =  { 114711111, 108333333,  97500000 };
+	static const u32 rates_106[3] =  {  40000000,  37777777,  34000000 };
+	static const u32 rates_52[3]  =  {  18820000,  17777777,  16000000 };
+	static const u32 rates_26[3]  =  {   9411111,   8888888,   8000000 };
+	u64 tmp;
+	u32 result;
+
+	if (WARN_ON_ONCE(rate->mcs > 15))
+		return 0;
+	if (WARN_ON_ONCE(rate->eht_gi > NL80211_RATE_INFO_EHT_GI_3_2))
+		return 0;
+	if (WARN_ON_ONCE(rate->eht_ru_alloc >
+			 NL80211_RATE_INFO_EHT_RU_ALLOC_4x996))
+		return 0;
+	if (WARN_ON_ONCE(rate->nss < 1 || rate->nss > 8))
+		return 0;
+
+	/* Bandwidth checks for MCS 14 */
+	if (rate->mcs == 14) {
+		if ((rate->bw != RATE_INFO_BW_EHT_RU &&
+		     rate->bw != RATE_INFO_BW_80 &&
+		     rate->bw != RATE_INFO_BW_160 &&
+		     rate->bw != RATE_INFO_BW_320) ||
+		    (rate->bw == RATE_INFO_BW_EHT_RU &&
+		     rate->eht_ru_alloc != NL80211_RATE_INFO_EHT_RU_ALLOC_996 &&
+		     rate->eht_ru_alloc != NL80211_RATE_INFO_EHT_RU_ALLOC_2x996 &&
+		     rate->eht_ru_alloc != NL80211_RATE_INFO_EHT_RU_ALLOC_4x996)) {
+			WARN(1, "invalid EHT BW for MCS 14: bw:%d, ru:%d\n",
+			     rate->bw, rate->eht_ru_alloc);
+			return 0;
+		}
+	}
+
+	if (rate->bw == RATE_INFO_BW_320 ||
+	    (rate->bw == RATE_INFO_BW_EHT_RU &&
+	     rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_4x996))
+		result = 4 * rates_996[rate->eht_gi];
+	else if (rate->bw == RATE_INFO_BW_EHT_RU &&
+		 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_3x996P484)
+		result = 3 * rates_996[rate->eht_gi] + rates_484[rate->eht_gi];
+	else if (rate->bw == RATE_INFO_BW_EHT_RU &&
+		 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_3x996)
+		result = 3 * rates_996[rate->eht_gi];
+	else if (rate->bw == RATE_INFO_BW_EHT_RU &&
+		 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_2x996P484)
+		result = 2 * rates_996[rate->eht_gi] + rates_484[rate->eht_gi];
+	else if (rate->bw == RATE_INFO_BW_160 ||
+		 (rate->bw == RATE_INFO_BW_EHT_RU &&
+		  rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_2x996))
+		result = 2 * rates_996[rate->eht_gi];
+	else if (rate->bw == RATE_INFO_BW_EHT_RU &&
+		 rate->eht_ru_alloc ==
+		 NL80211_RATE_INFO_EHT_RU_ALLOC_996P484P242)
+		result = rates_996[rate->eht_gi] + rates_484[rate->eht_gi]
+			 + rates_242[rate->eht_gi];
+	else if (rate->bw == RATE_INFO_BW_EHT_RU &&
+		 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_996P484)
+		result = rates_996[rate->eht_gi] + rates_484[rate->eht_gi];
+	else if (rate->bw == RATE_INFO_BW_80 ||
+		 (rate->bw == RATE_INFO_BW_EHT_RU &&
+		  rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_996))
+		result = rates_996[rate->eht_gi];
+	else if (rate->bw == RATE_INFO_BW_EHT_RU &&
+		 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_484P242)
+		result = rates_484[rate->eht_gi] + rates_242[rate->eht_gi];
+	else if (rate->bw == RATE_INFO_BW_40 ||
+		 (rate->bw == RATE_INFO_BW_EHT_RU &&
+		  rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_484))
+		result = rates_484[rate->eht_gi];
+	else if (rate->bw == RATE_INFO_BW_20 ||
+		 (rate->bw == RATE_INFO_BW_EHT_RU &&
+		  rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_242))
+		result = rates_242[rate->eht_gi];
+	else if (rate->bw == RATE_INFO_BW_EHT_RU &&
+		 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_106P26)
+		result = rates_106[rate->eht_gi] + rates_26[rate->eht_gi];
+	else if (rate->bw == RATE_INFO_BW_EHT_RU &&
+		 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_106)
+		result = rates_106[rate->eht_gi];
+	else if (rate->bw == RATE_INFO_BW_EHT_RU &&
+		 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_52P26)
+		result = rates_52[rate->eht_gi] + rates_26[rate->eht_gi];
+	else if (rate->bw == RATE_INFO_BW_EHT_RU &&
+		 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_52)
+		result = rates_52[rate->eht_gi];
+	else if (rate->bw == RATE_INFO_BW_EHT_RU &&
+		 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_26)
+		result = rates_26[rate->eht_gi];
+	else {
+		WARN(1, "invalid EHT MCS: bw:%d, ru:%d\n",
+		     rate->bw, rate->eht_ru_alloc);
+		return 0;
+	}
+
+	/* now scale to the appropriate MCS */
+	tmp = result;
+	tmp *= SCALE;
+	do_div(tmp, mcs_divisors[rate->mcs]);
+	result = tmp;
+
+	/* and take NSS */
+	result = (result * rate->nss) / 8;
+
+	return result / 10000;
+}
+
 u32 cfg80211_calculate_bitrate(struct rate_info *rate)
 {
 	if (rate->flags & RATE_INFO_FLAGS_MCS)
@@ -1442,6 +1573,8 @@ u32 cfg80211_calculate_bitrate(struct rate_info *rate)
 		return cfg80211_calculate_bitrate_vht(rate);
 	if (rate->flags & RATE_INFO_FLAGS_HE_MCS)
 		return cfg80211_calculate_bitrate_he(rate);
+	if (rate->flags & RATE_INFO_FLAGS_EHT_MCS)
+		return cfg80211_calculate_bitrate_eht(rate);
 
 	return rate->legacy;
 }
@@ -2151,7 +2284,7 @@ void cfg80211_send_layer2_update(struct net_device *dev, const u8 *addr)
 	skb->dev = dev;
 	skb->protocol = eth_type_trans(skb, dev);
 	memset(skb->cb, 0, sizeof(skb->cb));
-	netif_rx_ni(skb);
+	netif_rx(skb);
 }
 EXPORT_SYMBOL(cfg80211_send_layer2_update);
 
diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c
index 28ef3f4465ae..2c34caee0fd1 100644
--- a/net/xdp/xsk.c
+++ b/net/xdp/xsk.c
@@ -343,9 +343,9 @@ out:
 }
 EXPORT_SYMBOL(xsk_tx_peek_desc);
 
-static u32 xsk_tx_peek_release_fallback(struct xsk_buff_pool *pool, struct xdp_desc *descs,
-					u32 max_entries)
+static u32 xsk_tx_peek_release_fallback(struct xsk_buff_pool *pool, u32 max_entries)
 {
+	struct xdp_desc *descs = pool->tx_descs;
 	u32 nb_pkts = 0;
 
 	while (nb_pkts < max_entries && xsk_tx_peek_desc(pool, &descs[nb_pkts]))
@@ -355,8 +355,7 @@ static u32 xsk_tx_peek_release_fallback(struct xsk_buff_pool *pool, struct xdp_d
 	return nb_pkts;
 }
 
-u32 xsk_tx_peek_release_desc_batch(struct xsk_buff_pool *pool, struct xdp_desc *descs,
-				   u32 max_entries)
+u32 xsk_tx_peek_release_desc_batch(struct xsk_buff_pool *pool, u32 max_entries)
 {
 	struct xdp_sock *xs;
 	u32 nb_pkts;
@@ -365,7 +364,7 @@ u32 xsk_tx_peek_release_desc_batch(struct xsk_buff_pool *pool, struct xdp_desc *
 	if (!list_is_singular(&pool->xsk_tx_list)) {
 		/* Fallback to the non-batched version */
 		rcu_read_unlock();
-		return xsk_tx_peek_release_fallback(pool, descs, max_entries);
+		return xsk_tx_peek_release_fallback(pool, max_entries);
 	}
 
 	xs = list_first_or_null_rcu(&pool->xsk_tx_list, struct xdp_sock, tx_list);
@@ -374,7 +373,7 @@ u32 xsk_tx_peek_release_desc_batch(struct xsk_buff_pool *pool, struct xdp_desc *
 		goto out;
 	}
 
-	nb_pkts = xskq_cons_peek_desc_batch(xs->tx, descs, pool, max_entries);
+	nb_pkts = xskq_cons_peek_desc_batch(xs->tx, pool, max_entries);
 	if (!nb_pkts) {
 		xs->tx->queue_empty_descs++;
 		goto out;
@@ -386,7 +385,7 @@ u32 xsk_tx_peek_release_desc_batch(struct xsk_buff_pool *pool, struct xdp_desc *
 	 * packets. This avoids having to implement any buffering in
 	 * the Tx path.
 	 */
-	nb_pkts = xskq_prod_reserve_addr_batch(pool->cq, descs, nb_pkts);
+	nb_pkts = xskq_prod_reserve_addr_batch(pool->cq, pool->tx_descs, nb_pkts);
 	if (!nb_pkts)
 		goto out;
 
@@ -403,18 +402,8 @@ EXPORT_SYMBOL(xsk_tx_peek_release_desc_batch);
 static int xsk_wakeup(struct xdp_sock *xs, u8 flags)
 {
 	struct net_device *dev = xs->dev;
-	int err;
-
-	rcu_read_lock();
-	err = dev->netdev_ops->ndo_xsk_wakeup(dev, xs->queue_id, flags);
-	rcu_read_unlock();
-
-	return err;
-}
 
-static int xsk_zc_xmit(struct xdp_sock *xs)
-{
-	return xsk_wakeup(xs, XDP_WAKEUP_TX);
+	return dev->netdev_ops->ndo_xsk_wakeup(dev, xs->queue_id, flags);
 }
 
 static void xsk_destruct_skb(struct sk_buff *skb)
@@ -533,6 +522,12 @@ static int xsk_generic_xmit(struct sock *sk)
 
 	mutex_lock(&xs->mutex);
 
+	/* Since we dropped the RCU read lock, the socket state might have changed. */
+	if (unlikely(!xsk_is_bound(xs))) {
+		err = -ENXIO;
+		goto out;
+	}
+
 	if (xs->queue_id >= xs->dev->real_num_tx_queues)
 		goto out;
 
@@ -596,16 +591,26 @@ out:
 	return err;
 }
 
-static int __xsk_sendmsg(struct sock *sk)
+static int xsk_xmit(struct sock *sk)
 {
 	struct xdp_sock *xs = xdp_sk(sk);
+	int ret;
 
 	if (unlikely(!(xs->dev->flags & IFF_UP)))
 		return -ENETDOWN;
 	if (unlikely(!xs->tx))
 		return -ENOBUFS;
 
-	return xs->zc ? xsk_zc_xmit(xs) : xsk_generic_xmit(sk);
+	if (xs->zc)
+		return xsk_wakeup(xs, XDP_WAKEUP_TX);
+
+	/* Drop the RCU lock since the SKB path might sleep. */
+	rcu_read_unlock();
+	ret = xsk_generic_xmit(sk);
+	/* Reaquire RCU lock before going into common code. */
+	rcu_read_lock();
+
+	return ret;
 }
 
 static bool xsk_no_wakeup(struct sock *sk)
@@ -619,7 +624,7 @@ static bool xsk_no_wakeup(struct sock *sk)
 #endif
 }
 
-static int xsk_sendmsg(struct socket *sock, struct msghdr *m, size_t total_len)
+static int __xsk_sendmsg(struct socket *sock, struct msghdr *m, size_t total_len)
 {
 	bool need_wait = !(m->msg_flags & MSG_DONTWAIT);
 	struct sock *sk = sock->sk;
@@ -639,11 +644,22 @@ static int xsk_sendmsg(struct socket *sock, struct msghdr *m, size_t total_len)
 
 	pool = xs->pool;
 	if (pool->cached_need_wakeup & XDP_WAKEUP_TX)
-		return __xsk_sendmsg(sk);
+		return xsk_xmit(sk);
 	return 0;
 }
 
-static int xsk_recvmsg(struct socket *sock, struct msghdr *m, size_t len, int flags)
+static int xsk_sendmsg(struct socket *sock, struct msghdr *m, size_t total_len)
+{
+	int ret;
+
+	rcu_read_lock();
+	ret = __xsk_sendmsg(sock, m, total_len);
+	rcu_read_unlock();
+
+	return ret;
+}
+
+static int __xsk_recvmsg(struct socket *sock, struct msghdr *m, size_t len, int flags)
 {
 	bool need_wait = !(flags & MSG_DONTWAIT);
 	struct sock *sk = sock->sk;
@@ -669,6 +685,17 @@ static int xsk_recvmsg(struct socket *sock, struct msghdr *m, size_t len, int fl
 	return 0;
 }
 
+static int xsk_recvmsg(struct socket *sock, struct msghdr *m, size_t len, int flags)
+{
+	int ret;
+
+	rcu_read_lock();
+	ret = __xsk_recvmsg(sock, m, len, flags);
+	rcu_read_unlock();
+
+	return ret;
+}
+
 static __poll_t xsk_poll(struct file *file, struct socket *sock,
 			     struct poll_table_struct *wait)
 {
@@ -679,8 +706,11 @@ static __poll_t xsk_poll(struct file *file, struct socket *sock,
 
 	sock_poll_wait(file, sock, wait);
 
-	if (unlikely(!xsk_is_bound(xs)))
+	rcu_read_lock();
+	if (unlikely(!xsk_is_bound(xs))) {
+		rcu_read_unlock();
 		return mask;
+	}
 
 	pool = xs->pool;
 
@@ -689,7 +719,7 @@ static __poll_t xsk_poll(struct file *file, struct socket *sock,
 			xsk_wakeup(xs, pool->cached_need_wakeup);
 		else
 			/* Poll needs to drive Tx also in copy mode */
-			__xsk_sendmsg(sk);
+			xsk_xmit(sk);
 	}
 
 	if (xs->rx && !xskq_prod_is_empty(xs->rx))
@@ -697,6 +727,7 @@ static __poll_t xsk_poll(struct file *file, struct socket *sock,
 	if (xs->tx && xsk_tx_writeable(xs))
 		mask |= EPOLLOUT | EPOLLWRNORM;
 
+	rcu_read_unlock();
 	return mask;
 }
 
@@ -728,7 +759,6 @@ static void xsk_unbind_dev(struct xdp_sock *xs)
 
 	/* Wait for driver to stop using the xdp socket. */
 	xp_del_xsk(xs->pool, xs);
-	xs->dev = NULL;
 	synchronize_net();
 	dev_put(dev);
 }
diff --git a/net/xdp/xsk_buff_pool.c b/net/xdp/xsk_buff_pool.c
index fd39bb660ebc..b34fca6ada86 100644
--- a/net/xdp/xsk_buff_pool.c
+++ b/net/xdp/xsk_buff_pool.c
@@ -37,6 +37,7 @@ void xp_destroy(struct xsk_buff_pool *pool)
 	if (!pool)
 		return;
 
+	kvfree(pool->tx_descs);
 	kvfree(pool->heads);
 	kvfree(pool);
 }
@@ -58,6 +59,12 @@ struct xsk_buff_pool *xp_create_and_assign_umem(struct xdp_sock *xs,
 	if (!pool->heads)
 		goto out;
 
+	if (xs->tx) {
+		pool->tx_descs = kcalloc(xs->tx->nentries, sizeof(*pool->tx_descs), GFP_KERNEL);
+		if (!pool->tx_descs)
+			goto out;
+	}
+
 	pool->chunk_mask = ~((u64)umem->chunk_size - 1);
 	pool->addrs_cnt = umem->size;
 	pool->heads_cnt = umem->chunks;
diff --git a/net/xdp/xsk_queue.h b/net/xdp/xsk_queue.h
index e9aa2c236356..801cda5d1938 100644
--- a/net/xdp/xsk_queue.h
+++ b/net/xdp/xsk_queue.h
@@ -205,11 +205,11 @@ static inline bool xskq_cons_read_desc(struct xsk_queue *q,
 	return false;
 }
 
-static inline u32 xskq_cons_read_desc_batch(struct xsk_queue *q,
-					    struct xdp_desc *descs,
-					    struct xsk_buff_pool *pool, u32 max)
+static inline u32 xskq_cons_read_desc_batch(struct xsk_queue *q, struct xsk_buff_pool *pool,
+					    u32 max)
 {
 	u32 cached_cons = q->cached_cons, nb_entries = 0;
+	struct xdp_desc *descs = pool->tx_descs;
 
 	while (cached_cons != q->cached_prod && nb_entries < max) {
 		struct xdp_rxtx_ring *ring = (struct xdp_rxtx_ring *)q->ring;
@@ -282,12 +282,12 @@ static inline bool xskq_cons_peek_desc(struct xsk_queue *q,
 	return xskq_cons_read_desc(q, desc, pool);
 }
 
-static inline u32 xskq_cons_peek_desc_batch(struct xsk_queue *q, struct xdp_desc *descs,
-					    struct xsk_buff_pool *pool, u32 max)
+static inline u32 xskq_cons_peek_desc_batch(struct xsk_queue *q, struct xsk_buff_pool *pool,
+					    u32 max)
 {
 	u32 entries = xskq_cons_nb_entries(q, max);
 
-	return xskq_cons_read_desc_batch(q, descs, pool, entries);
+	return xskq_cons_read_desc_batch(q, pool, entries);
 }
 
 /* To improve performance in the xskq_cons_release functions, only update local state here.
@@ -304,13 +304,6 @@ static inline void xskq_cons_release_n(struct xsk_queue *q, u32 cnt)
 	q->cached_cons += cnt;
 }
 
-static inline bool xskq_cons_is_full(struct xsk_queue *q)
-{
-	/* No barriers needed since data is not accessed */
-	return READ_ONCE(q->ring->producer) - READ_ONCE(q->ring->consumer) ==
-		q->nentries;
-}
-
 static inline u32 xskq_cons_present_entries(struct xsk_queue *q)
 {
 	/* No barriers needed since data is not accessed */
diff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c
index 39bce5d764de..36aa01d92b65 100644
--- a/net/xfrm/xfrm_device.c
+++ b/net/xfrm/xfrm_device.c
@@ -143,7 +143,7 @@ struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t featur
 		segs = skb_gso_segment(skb, esp_features);
 		if (IS_ERR(segs)) {
 			kfree_skb(skb);
-			atomic_long_inc(&dev->tx_dropped);
+			dev_core_stats_tx_dropped_inc(dev);
 			return NULL;
 		} else {
 			consume_skb(skb);
@@ -384,16 +384,6 @@ static int xfrm_api_check(struct net_device *dev)
 	return NOTIFY_DONE;
 }
 
-static int xfrm_dev_register(struct net_device *dev)
-{
-	return xfrm_api_check(dev);
-}
-
-static int xfrm_dev_feat_change(struct net_device *dev)
-{
-	return xfrm_api_check(dev);
-}
-
 static int xfrm_dev_down(struct net_device *dev)
 {
 	if (dev->features & NETIF_F_HW_ESP)
@@ -408,10 +398,10 @@ static int xfrm_dev_event(struct notifier_block *this, unsigned long event, void
 
 	switch (event) {
 	case NETDEV_REGISTER:
-		return xfrm_dev_register(dev);
+		return xfrm_api_check(dev);
 
 	case NETDEV_FEAT_CHANGE:
-		return xfrm_dev_feat_change(dev);
+		return xfrm_api_check(dev);
 
 	case NETDEV_DOWN:
 	case NETDEV_UNREGISTER:
diff --git a/net/xfrm/xfrm_interface.c b/net/xfrm/xfrm_interface.c
index 1e8b26eecb3f..5113fa0fbcee 100644
--- a/net/xfrm/xfrm_interface.c
+++ b/net/xfrm/xfrm_interface.c
@@ -190,7 +190,7 @@ static void xfrmi_dev_uninit(struct net_device *dev)
 
 static void xfrmi_scrub_packet(struct sk_buff *skb, bool xnet)
 {
-	skb->tstamp = 0;
+	skb_clear_tstamp(skb);
 	skb->pkt_type = PACKET_HOST;
 	skb->skb_iif = 0;
 	skb->ignore_df = 0;
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 882526159d3a..19aa994f5d2c 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -3158,7 +3158,7 @@ ok:
 
 nopol:
 	if (!(dst_orig->dev->flags & IFF_LOOPBACK) &&
-	    !xfrm_default_allow(net, dir)) {
+	    net->xfrm.policy_default[dir] == XFRM_USERPOLICY_BLOCK) {
 		err = -EPERM;
 		goto error;
 	}
@@ -3569,7 +3569,7 @@ int __xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb,
 	}
 
 	if (!pol) {
-		if (!xfrm_default_allow(net, dir)) {
+		if (net->xfrm.policy_default[dir] == XFRM_USERPOLICY_BLOCK) {
 			XFRM_INC_STATS(net, LINUX_MIB_XFRMINNOPOLS);
 			return 0;
 		}
@@ -3629,7 +3629,8 @@ int __xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb,
 		}
 		xfrm_nr = ti;
 
-		if (!xfrm_default_allow(net, dir) && !xfrm_nr) {
+		if (net->xfrm.policy_default[dir] == XFRM_USERPOLICY_BLOCK &&
+		    !xfrm_nr) {
 			XFRM_INC_STATS(net, LINUX_MIB_XFRMINNOSTATES);
 			goto reject;
 		}
@@ -4118,6 +4119,9 @@ static int __net_init xfrm_net_init(struct net *net)
 	spin_lock_init(&net->xfrm.xfrm_policy_lock);
 	seqcount_spinlock_init(&net->xfrm.xfrm_policy_hash_generation, &net->xfrm.xfrm_policy_lock);
 	mutex_init(&net->xfrm.xfrm_cfg_mutex);
+	net->xfrm.policy_default[XFRM_POLICY_IN] = XFRM_USERPOLICY_ACCEPT;
+	net->xfrm.policy_default[XFRM_POLICY_FWD] = XFRM_USERPOLICY_ACCEPT;
+	net->xfrm.policy_default[XFRM_POLICY_OUT] = XFRM_USERPOLICY_ACCEPT;
 
 	rv = xfrm_statistics_init(net);
 	if (rv < 0)
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 72b2f173aac8..64fa8fdd6bbd 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -1994,12 +1994,9 @@ static int xfrm_notify_userpolicy(struct net *net)
 	}
 
 	up = nlmsg_data(nlh);
-	up->in = net->xfrm.policy_default & XFRM_POL_DEFAULT_IN ?
-			XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT;
-	up->fwd = net->xfrm.policy_default & XFRM_POL_DEFAULT_FWD ?
-			XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT;
-	up->out = net->xfrm.policy_default & XFRM_POL_DEFAULT_OUT ?
-			XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT;
+	up->in = net->xfrm.policy_default[XFRM_POLICY_IN];
+	up->fwd = net->xfrm.policy_default[XFRM_POLICY_FWD];
+	up->out = net->xfrm.policy_default[XFRM_POLICY_OUT];
 
 	nlmsg_end(skb, nlh);
 
@@ -2010,26 +2007,26 @@ static int xfrm_notify_userpolicy(struct net *net)
 	return err;
 }
 
+static bool xfrm_userpolicy_is_valid(__u8 policy)
+{
+	return policy == XFRM_USERPOLICY_BLOCK ||
+	       policy == XFRM_USERPOLICY_ACCEPT;
+}
+
 static int xfrm_set_default(struct sk_buff *skb, struct nlmsghdr *nlh,
 			    struct nlattr **attrs)
 {
 	struct net *net = sock_net(skb->sk);
 	struct xfrm_userpolicy_default *up = nlmsg_data(nlh);
 
-	if (up->in == XFRM_USERPOLICY_BLOCK)
-		net->xfrm.policy_default |= XFRM_POL_DEFAULT_IN;
-	else if (up->in == XFRM_USERPOLICY_ACCEPT)
-		net->xfrm.policy_default &= ~XFRM_POL_DEFAULT_IN;
+	if (xfrm_userpolicy_is_valid(up->in))
+		net->xfrm.policy_default[XFRM_POLICY_IN] = up->in;
 
-	if (up->fwd == XFRM_USERPOLICY_BLOCK)
-		net->xfrm.policy_default |= XFRM_POL_DEFAULT_FWD;
-	else if (up->fwd == XFRM_USERPOLICY_ACCEPT)
-		net->xfrm.policy_default &= ~XFRM_POL_DEFAULT_FWD;
+	if (xfrm_userpolicy_is_valid(up->fwd))
+		net->xfrm.policy_default[XFRM_POLICY_FWD] = up->fwd;
 
-	if (up->out == XFRM_USERPOLICY_BLOCK)
-		net->xfrm.policy_default |= XFRM_POL_DEFAULT_OUT;
-	else if (up->out == XFRM_USERPOLICY_ACCEPT)
-		net->xfrm.policy_default &= ~XFRM_POL_DEFAULT_OUT;
+	if (xfrm_userpolicy_is_valid(up->out))
+		net->xfrm.policy_default[XFRM_POLICY_OUT] = up->out;
 
 	rt_genid_bump_all(net);
 
@@ -2059,13 +2056,9 @@ static int xfrm_get_default(struct sk_buff *skb, struct nlmsghdr *nlh,
 	}
 
 	r_up = nlmsg_data(r_nlh);
-
-	r_up->in = net->xfrm.policy_default & XFRM_POL_DEFAULT_IN ?
-			XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT;
-	r_up->fwd = net->xfrm.policy_default & XFRM_POL_DEFAULT_FWD ?
-			XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT;
-	r_up->out = net->xfrm.policy_default & XFRM_POL_DEFAULT_OUT ?
-			XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT;
+	r_up->in = net->xfrm.policy_default[XFRM_POLICY_IN];
+	r_up->fwd = net->xfrm.policy_default[XFRM_POLICY_FWD];
+	r_up->out = net->xfrm.policy_default[XFRM_POLICY_OUT];
 	nlmsg_end(r_skb, r_nlh);
 
 	return nlmsg_unicast(net->xfrm.nlsk, r_skb, portid);
author	Linus Torvalds <torvalds@linux-foundation.org>	2022-03-24 23:13:26 +0300
committer	Linus Torvalds <torvalds@linux-foundation.org>	2022-03-24 23:13:26 +0300
commit	169e77764adc041b1dacba84ea90516a895d43b2 (patch)
tree	af7124681fa65d40fccee902af5194ab9f9c95f4 /net
parent	7403e6d8263937dea206dd201fed1ceed190ca18 (diff)
parent	89695196f0ba78a17453f9616355f2ca6b293402 (diff)
download	linux-169e77764adc041b1dacba84ea90516a895d43b2.tar.xz