linux/net/unix
Linus Torvalds 8f7aa3d3c7 Networking changes for 6.19.
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
 
 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-next-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

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
  ...
2025-12-03 17:24:33 -08:00
..
Kconfig af_unix: Add a prompt to CONFIG_AF_UNIX_OOB 2024-12-19 19:16:15 -08:00
Makefile af_unix: Remove CONFIG_UNIX_SCM. 2024-01-31 16:41:16 -08:00
af_unix.c Networking changes for 6.19. 2025-12-03 17:24:33 -08:00
af_unix.h af_unix: Consolidate unix_schedule_gc() and wait_for_unix_gc(). 2025-11-18 19:19:32 -08:00
diag.c net: remove sock_i_uid() 2025-06-23 17:04:03 -07:00
garbage.c af_unix: Consolidate unix_schedule_gc() and wait_for_unix_gc(). 2025-11-18 19:19:32 -08:00
sysctl_net_unix.c af_unix: Clean up #include under net/unix/. 2025-03-25 04:30:07 -07:00
unix_bpf.c af_unix: Explicitly include headers for non-pointer struct fields. 2025-03-25 04:30:07 -07:00