kernel/linux.git/drivers/net/wireguard, branch v6.19.11

Merge tag 'net-next-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

2025-12-04T01:24:33+00:00

Pull networking updates from Jakub Kicinski: "Core & protocols: - Replace busylock at the Tx queuing layer with a lockless list. Resulting in a 300% (4x) improvement on heavy TX workloads, sending twice the number of packets per second, for half the cpu cycles. - Allow constantly busy flows to migrate to a more suitable CPU/NIC queue. Normally we perform queue re-selection when flow comes out of idle, but under extreme circumstances the flows may be constantly busy. Add sysctl to allow periodic rehashing even if it'd risk packet reordering. - Optimize the NAPI skb cache, make it larger, use it in more paths. - Attempt returning Tx skbs to the originating CPU (like we already did for Rx skbs). - Various data structure layout and prefetch optimizations from Eric. - Remove ktime_get() from the recvmsg() fast path, ktime_get() is sadly quite expensive on recent AMD machines. - Extend threaded NAPI polling to allow the kthread busy poll for packets. - Make MPTCP use Rx backlog processing. This lowers the lock pressure, improving the Rx performance. - Support memcg accounting of MPTCP socket memory. - Allow admin to opt sockets out of global protocol memory accounting (using a sysctl or BPF-based policy). The global limits are a poor fit for modern container workloads, where limits are imposed using cgroups. - Improve heuristics for when to kick off AF_UNIX garbage collection. - Allow users to control TCP SACK compression, and default to 33% of RTT. - Add tcp_rcvbuf_low_rtt sysctl to let datacenter users avoid unnecessarily aggressive rcvbuf growth and overshot when the connection RTT is low. - Preserve skb metadata space across skb_push / skb_pull operations. - Support for IPIP encapsulation in the nftables flowtable offload. - Support appending IP interface information to ICMP messages (RFC 5837). - Support setting max record size in TLS (RFC 8449). - Remove taking rtnl_lock from RTM_GETNEIGHTBL and RTM_SETNEIGHTBL. - Use a dedicated lock (and RCU) in MPLS, instead of rtnl_lock. - Let users configure the number of write buffers in SMC. - Add new struct sockaddr_unsized for sockaddr of unknown length, from Kees. - Some conversions away from the crypto_ahash API, from Eric Biggers. - Some preparations for slimming down struct page. - YAML Netlink protocol spec for WireGuard. - Add a tool on top of YAML Netlink specs/lib for reporting commonly computed derived statistics and summarized system state. Driver API: - Add CAN XL support to the CAN Netlink interface. - Add uAPI for reporting PHY Mean Square Error (MSE) diagnostics, as defined by the OPEN Alliance's "Advanced diagnostic features for 100BASE-T1 automotive Ethernet PHYs" specification. - Add DPLL phase-adjust-gran pin attribute (and implement it in zl3073x). - Refactor xfrm_input lock to reduce contention when NIC offloads IPsec and performs RSS. - Add info to devlink params whether the current setting is the default or a user override. Allow resetting back to default. - Add standard device stats for PSP crypto offload. - Leverage DSA frame broadcast to implement simple HSR frame duplication for a lot of switches without dedicated HSR offload. - Add uAPI defines for 1.6Tbps link modes. Device drivers: - Add Motorcomm YT921x gigabit Ethernet switch support. - Add MUCSE driver for N500/N210 1GbE NIC series. - Convert drivers to support dedicated ops for timestamping control, and away from the direct IOCTL handling. While at it support GET operations for PHY timestamping. - Add (and convert most drivers to) a dedicated ethtool callback for reading the Rx ring count. - Significant refactoring efforts in the STMMAC driver, which supports Synopsys turn-key MAC IP integrated into a ton of SoCs. - Ethernet high-speed NICs: - Broadcom (bnxt): - support PPS in/out on all pins - Intel (100G, ice, idpf): - ice: implement standard ethtool and timestamping stats - i40e: support setting the max number of MAC addresses per VF - iavf: support RSS of GTP tunnels for 5G and LTE deployments - nVidia/Mellanox (mlx5): - reduce downtime on interface reconfiguration - disable being an XDP redirect target by default (same as other drivers) to avoid wasting resources if feature is unused - Meta (fbnic): - add support for Linux-managed PCS on 25G, 50G, and 100G links - Wangxun: - support Rx descriptor merge, and Tx head writeback - support Rx coalescing offload - support 25G SPF and 40G QSFP modules - Ethernet virtual: - Google (gve): - allow ethtool to configure rx_buf_len - implement XDP HW RX Timestamping support for DQ descriptor format - Microsoft vNIC (mana): - support HW link state events - handle hardware recovery events when probing the device - Ethernet NICs consumer, and embedded: - usbnet: add support for Byte Queue Limits (BQL) - AMD (amd-xgbe): - add device selftests - NXP (enetc): - add i.MX94 support - Broadcom integrated MACs (bcmgenet, bcmasp): - bcmasp: add support for PHY-based Wake-on-LAN - Broadcom switches (b53): - support port isolation - support BCM5389/97/98 and BCM63XX ARL formats - Lantiq/MaxLinear switches: - support bridge FDB entries on the CPU port - use regmap for register access - allow user to enable/disable learning - support Energy Efficient Ethernet - support configuring RMII clock delays - add tagging driver for MaxLinear GSW1xx switches - Synopsys (stmmac): - support using the HW clock in free running mode - add Eswin EIC7700 support - add Rockchip RK3506 support - add Altera Agilex5 support - Cadence (macb): - cleanup and consolidate descriptor and DMA address handling - add EyeQ5 support - TI: - icssg-prueth: support AF_XDP - Airoha access points: - add missing Ethernet stats and link state callback - add AN7583 support - support out-of-order Tx completion processing - Power over Ethernet: - pd692x0: preserve PSE configuration across reboots - add support for TPS23881B devices - Ethernet PHYs: - Open Alliance OATC14 10BASE-T1S PHY cable diagnostic support - Support 50G SerDes and 100G interfaces in Linux-managed PHYs - micrel: - support for non PTP SKUs of lan8814 - enable in-band auto-negotiation on lan8814 - realtek: - cable testing support on RTL8224 - interrupt support on RTL8221B - motorcomm: support for PHY LEDs on YT853 - microchip: support for LAN867X Rev.D0 PHYs w/ SQI and cable diag - mscc: support for PHY LED control - CAN drivers: - m_can: add support for optional reset and system wake up - remove can_change_mtu() obsoleted by core handling - mcp251xfd: support GPIO controller functionality - Bluetooth: - add initial support for PASTa - WiFi: - split ieee80211.h file, it's way too big - improvements in VHT radiotap reporting, S1G, Channel Switch Announcement handling, rate tracking in mesh networks - improve multi-radio monitor mode support, and add a cfg80211 debugfs interface for it - HT action frame handling on 6 GHz - initial chanctx work towards NAN - MU-MIMO sniffer improvements - WiFi drivers: - RealTek (rtw89): - support USB devices RTL8852AU and RTL8852CU - initial work for RTL8922DE - improved injection support - Intel: - iwlwifi: new sniffer API support - MediaTek (mt76): - WED support for >32-bit DMA - airoha NPU support - regdomain improvements - continued WiFi7/MLO work - Qualcomm/Atheros: - ath10k: factory test support - ath11k: TX power insertion support - ath12k: BSS color change support - ath12k: statistics improvements - brcmfmac: Acer A1 840 tablet quirk - rtl8xxxu: 40 MHz connection fixes/support" * tag 'net-next-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1381 commits) net: page_pool: sanitise allocation order net: page pool: xa init with destroy on pp init net/mlx5e: Support XDP target xmit with dummy program net/mlx5e: Update XDP features in switch channels selftests/tc-testing: Test CAKE scheduler when enqueue drops packets net/sched: sch_cake: Fix incorrect qlen reduction in cake_drop wireguard: netlink: generate netlink code wireguard: uapi: generate header with ynl-gen wireguard: uapi: move flag enums wireguard: uapi: move enum wg_cmd wireguard: netlink: add YNL specification selftests: drv-net: Fix tolerance calculation in devlink_rate_tc_bw.py selftests: drv-net: Fix and clarify TC bandwidth split in devlink_rate_tc_bw.py selftests: drv-net: Set shell=True for sysfs writes in devlink_rate_tc_bw.py selftests: drv-net: Use Iperf3Runner in devlink_rate_tc_bw.py selftests: drv-net: introduce Iperf3Runner for measurement use cases selftests: drv-net: Add devlink_rate_tc_bw.py to TEST_PROGS net: ps3_gelic_net: Use napi_alloc_skb() and napi_gro_receive() Documentation: net: dsa: mention simple HSR offload helpers Documentation: net: dsa: mention availability of RedBox ...

wireguard: netlink: generate netlink code

2025-12-02T03:12:49+00:00

This patch adopts netlink policies and command definitions generated by ynl-gen, thus completing the conversion to YNL. Given that the old and new policies are functionally identical and have just been moved to a new file, it serves to verify that the policies generated from the spec are identical to the previous policy code. The following functions are renamed: wg_get_device_dump() -> wg_get_device_dumpit() wg_set_device() -> wg_set_device_doit() The new files are covered by the existing drivers/net/wireguard/ pattern in MAINTAINERS. No behavioural changes intended. Signed-off-by: Asbjørn Sloth Tønnesen Signed-off-by: Jason A. Donenfeld

wireguard: uapi: generate header with ynl-gen

2025-12-02T03:12:49+00:00

Use ynl-gen to generate the UAPI header for WireGuard. The cosmetic changes in this patch confirms that the spec is aligned with the implementation. By using the generated version, it ensures that they stay in sync. Changes in the generated header: * Trivial header guard rename. * Trivial white space changes. * Trivial comment changes. * Precompute bitflags in ynl-gen (see [1]). * Drop __*_F_ALL constants (see [1]). [1] https://lore.kernel.org/r/20251014123201.6ecfd146@kernel.org/ No behavioural changes intended. Signed-off-by: Asbjørn Sloth Tønnesen Signed-off-by: Jason A. Donenfeld

wireguard: netlink: lower .maxattr for WG_CMD_GET_DEVICE

2025-12-01T02:25:09+00:00

Previously .maxattr was shared for both WG_CMD_GET_DEVICE and WG_CMD_SET_DEVICE. Now that it is split, then we can lower it for WG_CMD_GET_DEVICE to follow the documentation which defines .maxattr as WGDEVICE_A_IFNAME for WG_CMD_GET_DEVICE. $ grep -hC5 'one but not both of:' include/uapi/linux/wireguard.h * WG_CMD_GET_DEVICE * ----------------- * * May only be called via NLM_F_REQUEST | NLM_F_DUMP. The command * should contain one but not both of: * * WGDEVICE_A_IFINDEX: NLA_U32 * WGDEVICE_A_IFNAME: NLA_NUL_STRING, maxlen IFNAMSIZ - 1 * * The kernel will then return several messages [...] While other attributes weren't rejected previously, the consensus is that nobody sends those attributes, so nothing should break. Link: https://lore.kernel.org/r/aRyLoy2iqbkUipZW@zx2c4.com/ Suggested-by: Jason A. Donenfeld Signed-off-by: Asbjørn Sloth Tønnesen Signed-off-by: Jason A. Donenfeld

wireguard: netlink: convert to split ops

2025-12-01T02:25:09+00:00

This patch converts WireGuard from using the legacy struct genl_ops to struct genl_split_ops, by applying the same transformation as genl_cmd_full_to_split() would otherwise do at runtime. WGDEVICE_A_MAX is swapped for WGDEVICE_A_PEERS, while they are currently equivalent, then .maxattr should be the maximum attribute that a given command supports, and not change along with WGDEVICE_A_MAX. This is an incremental step towards adopting netlink policy code generated by ynl-gen, ensuring that the code and spec is aligned. This is a trivial patch with no behavioural changes intended. Signed-off-by: Asbjørn Sloth Tønnesen Signed-off-by: Jason A. Donenfeld

wireguard: netlink: use WG_KEY_LEN in policies

2025-12-01T02:25:09+00:00

When converting the netlink policies to YNL, the constants used in the policy have to be visible to userspace. As NOISE_*_KEY_LEN isn't visible to userspace, change the policy to use WG_KEY_LEN, as also documented in the UAPI header: $ grep WG_KEY_LEN include/uapi/linux/wireguard.h * WGDEVICE_A_PRIVATE_KEY: NLA_EXACT_LEN, len WG_KEY_LEN * WGDEVICE_A_PUBLIC_KEY: NLA_EXACT_LEN, len WG_KEY_LEN * WGPEER_A_PUBLIC_KEY: NLA_EXACT_LEN, len WG_KEY_LEN * WGPEER_A_PRESHARED_KEY: NLA_EXACT_LEN, len WG_KEY_LEN [...] Add a couple of BUILD_BUG_ON() to ensure that they stay in sync. No behavioural changes intended. Signed-off-by: Asbjørn Sloth Tønnesen Signed-off-by: Jason A. Donenfeld

wireguard: netlink: validate nested arrays in policy

2025-12-01T02:25:09+00:00

Use NLA_POLICY_NESTED_ARRAY() to perform nested array validation in the policy validation step. The nested policy was already enforced through nla_parse_nested(), however extack wasn't passed previously, so no fancy error messages. With the nested attributes being validated directly in the policy, the policy argument can be set to NULL in the calls to nla_parse_nested(). Signed-off-by: Asbjørn Sloth Tønnesen Signed-off-by: Jason A. Donenfeld

wireguard: netlink: enable strict genetlink validation

2025-12-01T02:25:08+00:00

WireGuard is a modern enough genetlink family, that it doesn't need resv_start_op. It already had policies in place when it was first merged, it has also never used the reserved field, or other things toggled by resv_start_op. wireguard-tools have always used zero initialized memory, and have never touched the reserved field, neither have any other clients I have checked. Closed-source clients are much more likely to use the embeddedable library from wireguard-tools, than a DIY implementation using uninitialized memory. Signed-off-by: Asbjørn Sloth Tønnesen Signed-off-by: Jason A. Donenfeld

lib/crypto: blake2s: Rename blake2s_state to blake2s_ctx

2025-10-30T05:04:24+00:00

For consistency with the SHA-1, SHA-2, SHA-3 (in development), and MD5 library APIs, rename blake2s_state to blake2s_ctx. As a refresher, the ctx name: - Is a bit shorter. - Avoids confusion with the compression function state, which is also often called the state (but is just part of the full context). - Is consistent with OpenSSL. Not a big deal, of course. But consistency is nice. With a BLAKE2b library API about to be added, this is a convenient time to update this. Reviewed-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20251018043106.375964-3-ebiggers@kernel.org Signed-off-by: Eric Biggers

lib/crypto: blake2s: Adjust parameter order of blake2s()

2025-10-30T05:04:24+00:00

Reorder the parameters of blake2s() from (out, in, key, outlen, inlen, keylen) to (key, keylen, in, inlen, out, outlen). This aligns BLAKE2s with the common conventions of pairing buffers and their lengths, and having outputs follow inputs. This is widely used elsewhere in lib/crypto/ and crypto/, and even elsewhere in the BLAKE2s code itself such as blake2s_init_key() and blake2s_final(). So blake2s() was a bit of an exception. Notably, this results in the same order as hmac_*_usingrawkey(). Note that since the type signature changed, it's not possible for a blake2s() call site to be silently missed. Reviewed-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20251018043106.375964-2-ebiggers@kernel.org Signed-off-by: Eric Biggers