Merge tag 'net-next-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski:
 "Core:

   - support "prefer busy polling" NAPI operation mode, where we defer
     softirq for some time expecting applications to periodically busy
     poll

   - AF_XDP: improve efficiency by more batching and hindering the
     adjacency cache prefetcher

   - af_packet: make packet_fanout.arr size configurable up to 64K

   - tcp: optimize TCP zero copy receive in presence of partial or
     unaligned reads making zero copy a performance win for much smaller
     messages

   - XDP: add bulk APIs for returning / freeing frames

   - sched: support fragmenting IP packets as they come out of conntrack

   - net: allow virtual netdevs to forward UDP L4 and fraglist GSO skbs

  BPF:

   - BPF switch from crude rlimit-based to memcg-based memory accounting

   - BPF type format information for kernel modules and related tracing
     enhancements

   - BPF implement task local storage for BPF LSM

   - allow the FENTRY/FEXIT/RAW_TP tracing programs to use
     bpf_sk_storage

  Protocols:

   - mptcp: improve multiple xmit streams support, memory accounting and
     many smaller improvements

   - TLS: support CHACHA20-POLY1305 cipher

   - seg6: add support for SRv6 End.DT4/DT6 behavior

   - sctp: Implement RFC 6951: UDP Encapsulation of SCTP

   - ppp_generic: add ability to bridge channels directly

   - bridge: Connectivity Fault Management (CFM) support as is defined
     in IEEE 802.1Q section 12.14.

  Drivers:

   - mlx5: make use of the new auxiliary bus to organize the driver
     internals

   - mlx5: more accurate port TX timestamping support

   - mlxsw:
      - improve the efficiency of offloaded next hop updates by using
        the new nexthop object API
      - support blackhole nexthops
      - support IEEE 802.1ad (Q-in-Q) bridging

   - rtw88: major bluetooth co-existance improvements

   - iwlwifi: support new 6 GHz frequency band

   - ath11k: Fast Initial Link Setup (FILS)

   - mt7915: dual band concurrent (DBDC) support

   - net: ipa: add basic support for IPA v4.5

  Refactor:

   - a few pieces of in_interrupt() cleanup work from Sebastian Andrzej
     Siewior

   - phy: add support for shared interrupts; get rid of multiple driver
     APIs and have the drivers write a full IRQ handler, slight growth
     of driver code should be compensated by the simpler API which also
     allows shared IRQs

   - add common code for handling netdev per-cpu counters

   - move TX packet re-allocation from Ethernet switch tag drivers to a
     central place

   - improve efficiency and rename nla_strlcpy

   - number of W=1 warning cleanups as we now catch those in a patchwork
     build bot

  Old code removal:

   - wan: delete the DLCI / SDLA drivers

   - wimax: move to staging

   - wifi: remove old WDS wifi bridging support"

* tag 'net-next-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1922 commits)
  net: hns3: fix expression that is currently always true
  net: fix proc_fs init handling in af_packet and tls
  nfc: pn533: convert comma to semicolon
  af_vsock: Assign the vsock transport considering the vsock address flags
  af_vsock: Set VMADDR_FLAG_TO_HOST flag on the receive path
  vsock_addr: Check for supported flag values
  vm_sockets: Add VMADDR_FLAG_TO_HOST vsock flag
  vm_sockets: Add flags field in the vsock address data structure
  net: Disable NETIF_F_HW_TLS_TX when HW_CSUM is disabled
  tcp: Add logic to check for SYN w/ data in tcp_simple_retransmit
  net: mscc: ocelot: install MAC addresses in .ndo_set_rx_mode from process context
  nfc: s3fwrn5: Release the nfc firmware
  net: vxget: clean up sparse warnings
  mlxsw: spectrum_router: Use eXtended mezzanine to offload IPv4 router
  mlxsw: spectrum: Set KVH XLT cache mode for Spectrum2/3
  mlxsw: spectrum_router_xm: Introduce basic XM cache flushing
  mlxsw: reg: Add Router LPM Cache Enable Register
  mlxsw: reg: Add Router LPM Cache ML Delete Register
  mlxsw: spectrum_router_xm: Implement L-value tracking for M-index
  mlxsw: reg: Add XM Router M Table Register
  ...

1 files changed, 41 insertions, 18 deletions

diff --git a/net/bridge/br_mrp.c b/net/bridge/br_mrp.c
index b36689e6e7cb..cec2c4e4561d 100644
--- a/net/bridge/br_mrp.c
+++ b/net/bridge/br_mrp.c
@@ -6,6 +6,13 @@
 static const u8 mrp_test_dmac[ETH_ALEN] = { 0x1, 0x15, 0x4e, 0x0, 0x0, 0x1 };
 static const u8 mrp_in_test_dmac[ETH_ALEN] = { 0x1, 0x15, 0x4e, 0x0, 0x0, 0x3 };
 
+static int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb);
+
+static struct br_frame_type mrp_frame_type __read_mostly = {
+	.type = cpu_to_be16(ETH_P_MRP),
+	.frame_handler = br_mrp_process,
+};
+
 static bool br_mrp_is_ring_port(struct net_bridge_port *p_port,
 				struct net_bridge_port *s_port,
 				struct net_bridge_port *port)
@@ -47,8 +54,8 @@ static struct br_mrp *br_mrp_find_id(struct net_bridge *br, u32 ring_id)
 	struct br_mrp *res = NULL;
 	struct br_mrp *mrp;
 
-	list_for_each_entry_rcu(mrp, &br->mrp_list, list,
-				lockdep_rtnl_is_held()) {
+	hlist_for_each_entry_rcu(mrp, &br->mrp_list, list,
+				 lockdep_rtnl_is_held()) {
 		if (mrp->ring_id == ring_id) {
 			res = mrp;
 			break;
@@ -63,8 +70,8 @@ static struct br_mrp *br_mrp_find_in_id(struct net_bridge *br, u32 in_id)
 	struct br_mrp *res = NULL;
 	struct br_mrp *mrp;
 
-	list_for_each_entry_rcu(mrp, &br->mrp_list, list,
-				lockdep_rtnl_is_held()) {
+	hlist_for_each_entry_rcu(mrp, &br->mrp_list, list,
+				 lockdep_rtnl_is_held()) {
 		if (mrp->in_id == in_id) {
 			res = mrp;
 			break;
@@ -78,8 +85,8 @@ static bool br_mrp_unique_ifindex(struct net_bridge *br, u32 ifindex)
 {
 	struct br_mrp *mrp;
 
-	list_for_each_entry_rcu(mrp, &br->mrp_list, list,
-				lockdep_rtnl_is_held()) {
+	hlist_for_each_entry_rcu(mrp, &br->mrp_list, list,
+				 lockdep_rtnl_is_held()) {
 		struct net_bridge_port *p;
 
 		p = rtnl_dereference(mrp->p_port);
@@ -104,8 +111,8 @@ static struct br_mrp *br_mrp_find_port(struct net_bridge *br,
 	struct br_mrp *res = NULL;
 	struct br_mrp *mrp;
 
-	list_for_each_entry_rcu(mrp, &br->mrp_list, list,
-				lockdep_rtnl_is_held()) {
+	hlist_for_each_entry_rcu(mrp, &br->mrp_list, list,
+				 lockdep_rtnl_is_held()) {
 		if (rcu_access_pointer(mrp->p_port) == p ||
 		    rcu_access_pointer(mrp->s_port) == p ||
 		    rcu_access_pointer(mrp->i_port) == p) {
@@ -443,8 +450,11 @@ static void br_mrp_del_impl(struct net_bridge *br, struct br_mrp *mrp)
 		rcu_assign_pointer(mrp->i_port, NULL);
 	}
 
-	list_del_rcu(&mrp->list);
+	hlist_del_rcu(&mrp->list);
 	kfree_rcu(mrp, rcu);
+
+	if (hlist_empty(&br->mrp_list))
+		br_del_frame(br, &mrp_frame_type);
 }
 
 /* Adds a new MRP instance.
@@ -493,9 +503,12 @@ int br_mrp_add(struct net_bridge *br, struct br_mrp_instance *instance)
 	spin_unlock_bh(&br->lock);
 	rcu_assign_pointer(mrp->s_port, p);
 
+	if (hlist_empty(&br->mrp_list))
+		br_add_frame(br, &mrp_frame_type);
+
 	INIT_DELAYED_WORK(&mrp->test_work, br_mrp_test_work_expired);
 	INIT_DELAYED_WORK(&mrp->in_test_work, br_mrp_in_test_work_expired);
-	list_add_tail_rcu(&mrp->list, &br->mrp_list);
+	hlist_add_tail_rcu(&mrp->list, &br->mrp_list);
 
 	err = br_mrp_switchdev_add(br, mrp);
 	if (err)
@@ -845,7 +858,8 @@ static bool br_mrp_in_frame(struct sk_buff *skb)
 	if (hdr->type == BR_MRP_TLV_HEADER_IN_TEST ||
 	    hdr->type == BR_MRP_TLV_HEADER_IN_TOPO ||
 	    hdr->type == BR_MRP_TLV_HEADER_IN_LINK_DOWN ||
-	    hdr->type == BR_MRP_TLV_HEADER_IN_LINK_UP)
+	    hdr->type == BR_MRP_TLV_HEADER_IN_LINK_UP ||
+	    hdr->type == BR_MRP_TLV_HEADER_IN_LINK_STATUS)
 		return true;
 
 	return false;
@@ -1113,9 +1127,9 @@ static int br_mrp_rcv(struct net_bridge_port *p,
 						goto no_forward;
 				}
 			} else {
-				/* MIM should forward IntLinkChange and
+				/* MIM should forward IntLinkChange/Status and
 				 * IntTopoChange between ring ports but MIM
-				 * should not forward IntLinkChange and
+				 * should not forward IntLinkChange/Status and
 				 * IntTopoChange if the frame was received at
 				 * the interconnect port
 				 */
@@ -1142,6 +1156,17 @@ static int br_mrp_rcv(struct net_bridge_port *p,
 			     in_type == BR_MRP_TLV_HEADER_IN_LINK_DOWN))
 				goto forward;
 
+			/* MIC should forward IntLinkStatus frames only to
+			 * interconnect port if it was received on a ring port.
+			 * If it is received on interconnect port then, it
+			 * should be forward on both ring ports
+			 */
+			if (br_mrp_is_ring_port(p_port, s_port, p) &&
+			    in_type == BR_MRP_TLV_HEADER_IN_LINK_STATUS) {
+				p_dst = NULL;
+				s_dst = NULL;
+			}
+
 			/* Should forward the InTopo frames only between the
 			 * ring ports
 			 */
@@ -1172,20 +1197,18 @@ no_forward:
  * normal forwarding.
  * note: already called with rcu_read_lock
  */
-int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb)
+static int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb)
 {
 	/* If there is no MRP instance do normal forwarding */
 	if (likely(!(p->flags & BR_MRP_AWARE)))
 		goto out;
 
-	if (unlikely(skb->protocol == htons(ETH_P_MRP)))
-		return br_mrp_rcv(p, skb, p->dev);
-
+	return br_mrp_rcv(p, skb, p->dev);
 out:
 	return 0;
 }
 
 bool br_mrp_enabled(struct net_bridge *br)
 {
-	return !list_empty(&br->mrp_list);
+	return !hlist_empty(&br->mrp_list);
 }