linux/Documentation
Linus Torvalds 07fdad3a93 Networking changes for 6.18.
Core & protocols
 ----------------
 
  - Improve drop account scalability on NUMA hosts for RAW and UDP sockets
    and the backlog, almost doubling the Pps capacity under DoS.
 
  - Optimize the UDP RX performance under stress, reducing contention,
    revisiting the binary layout of the involved data structs and
    implementing NUMA-aware locking. This improves UDP RX performance by
    an additional 50%, even more under extreme conditions.
 
  - Add support for PSP encryption of TCP connections; this mechanism has
    some similarities with IPsec and TLS, but offers superior HW offloads
    capabilities.
 
  - Ongoing work to support Accurate ECN for TCP. AccECN allows more than
    one congestion notification signal per RTT and is a building block for
    Low Latency, Low Loss, and Scalable Throughput (L4S).
 
  - Reorganize the TCP socket binary layout for data locality, reducing
    the number of touched cachelines in the fastpath.
 
  - Refactor skb deferral free to better scale on large multi-NUMA hosts,
    this improves TCP and UDP RX performances significantly on such HW.
 
  - Increase the default socket memory buffer limits from 256K to 4M to
    better fit modern link speeds.
 
  - Improve handling of setups with a large number of nexthop, making dump
    operating scaling linearly and avoiding unneeded synchronize_rcu() on
    delete.
 
  - Improve bridge handling of VLAN FDB, storing a single entry per bridge
    instead of one entry per port; this makes the dump order of magnitude
    faster on large switches.
 
  - Restore IP ID correctly for encapsulated packets at GSO segmentation
    time, allowing GRO to merge packets in more scenarios.
 
  - Improve netfilter matching performance on large sets.
 
  - Improve MPTCP receive path performance by leveraging recently
    introduced core infrastructure (skb deferral free) and adopting recent
    TCP autotuning changes.
 
  - Allow bridges to redirect to a backup port when the bridge port is
    administratively down.
 
  - Introduce MPTCP 'laminar' endpoint that con be used only once per
    connection and simplify common MPTCP setups.
 
  - Add RCU safety to dst->dev, closing a lot of possible races.
 
  - A significant crypto library API for SCTP, MPTCP and IPv6 SR, reducing
    code duplication.
 
  - Supports pulling data from an skb frag into the linear area of an XDP
    buffer.
 
 Things we sprinkled into general kernel code
 --------------------------------------------
 
  - Generate netlink documentation from YAML using an integrated
    YAML parser.
 
 Driver API
 ----------
 
  - Support using IPv6 Flow Label in Rx hash computation and RSS queue
    selection.
 
  - Introduce API for fetching the DMA device for a given queue, allowing
    TCP zerocopy RX on more H/W setups.
 
  - Make XDP helpers compatible with unreadable memory, allowing more
    easily building DevMem-enabled drivers with a unified XDP/skbs
    datapath.
 
  - Add a new dedicated ethtool callback enabling drivers to provide the
    number of RX rings directly, improving efficiency and clarity in RX
    ring queries and RSS configuration.
 
  - Introduce a burst period for the health reporter, allowing better
    handling of multiple errors due to the same root cause.
 
  - Support for DPLL phase offset exponential moving average, controlling
    the average smoothing factor.
 
 Device drivers
 --------------
 
  - Add a new Huawei driver for 3rd gen NIC (hinic3).
 
  - Add a new SpacemiT driver for K1 ethernet MAC.
 
  - Add a generic abstraction for shared memory communication devices
    (dibps)
 
  - Ethernet high-speed NICs:
    - nVidia/Mellanox:
      - Use multiple per-queue doorbell, to avoid MMIO contention issues
      - support adjacent functions, allowing them to delegate their
        SR-IOV VFs to sibling PFs
      - support RSS for IPSec offload
      - support exposing raw cycle counters in PTP and mlx5
      - support for disabling host PFs.
    - Intel (100G, ice, idpf):
      - ice: support for SRIOV VFs over an Active-Active link aggregate
      - ice: support for firmware logging via debugfs
      - ice: support for Earliest TxTime First (ETF) hardware offload
      - idpf: support basic XDP functionalities and XSk
    - Broadcom (bnxt):
      - support Hyper-V VF ID
      - dynamic SRIOV resource allocations for RoCE
    - Meta (fbnic):
      - support queue API, zero-copy Rx and Tx
      - support basic XDP functionalities
      - devlink health support for FW crashes and OTP mem corruptions
      - expand hardware stats coverage to FEC, PHY, and Pause
    - Wangxun:
      - support ethtool coalesce options
      - support for multiple RSS contexts
 
  - Ethernet virtual:
    - Macsec:
      - replace custom netlink attribute checks with policy-level checks
    - Bonding:
      - support aggregator selection based on port priority
    - Microsoft vNIC:
      - use page pool fragments for RX buffers instead of full pages to
        improve memory efficiency
 
  - Ethernet NICs consumer, and embedded:
    - Qualcomm: support Ethernet function for IPQ9574 SoC
    - Airoha: implement wlan offloading via NPU
    - Freescale
      - enetc: add NETC timer PTP driver and add PTP support
      - fec: enable the Jumbo frame support for i.MX8QM
    - Renesas (R-Car S4): support HW offloading for layer 2 switching
      - support for RZ/{T2H, N2H} SoCs
    - Cadence (macb): support TAPRIO traffic scheduling
    - TI:
      - support for Gigabit ICSS ethernet SoC (icssm-prueth)
    - Synopsys (stmmac): a lot of cleanups
 
  - Ethernet PHYs:
    - Support 10g-qxgmi phy-mode for AQR412C, Felix DSA and Lynx PCS
      driver
    - Support bcm63268 GPHY power control
    - Support for Micrel lan8842 PHY and PTP
    - Support for Aquantia AQR412 and AQR115
 
  - CAN:
    - a large CAN-XL preparation work
    - reorganize raw_sock and uniqframe struct to minimize memory usage
    - rcar_canfd: update the CAN-FD handling
 
  - WiFi:
    - extended Neighbor Awareness Networking (NAN) support
    - S1G channel representation cleanup
    - improve S1G support
 
  - WiFi drivers:
    - Intel (iwlwifi):
      - major refactor and cleanup
    - Broadcom (brcm80211):
      - support for AP isolation
    - RealTek (rtw88/89) rtw88/89:
      - preparation work for RTL8922DE support
    - MediaTek (mt76):
      - HW restart improvements
      - MLO support
    - Qualcomm/Atheros (ath10k_
      - GTK rekey fixes
 
  - Bluetooth drivers:
    - btusb: support for several new IDs for MT7925
    - btintel: support for BlazarIW core
    - btintel_pcie: support for _suspend() / _resume()
    - btintel_pcie: support for Scorpious, Panther Lake-H484 IDs
 
 Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Merge tag 'net-next-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Paolo Abeni:
 "Core & protocols:

   - Improve drop account scalability on NUMA hosts for RAW and UDP
     sockets and the backlog, almost doubling the Pps capacity under DoS

   - Optimize the UDP RX performance under stress, reducing contention,
     revisiting the binary layout of the involved data structs and
     implementing NUMA-aware locking. This improves UDP RX performance
     by an additional 50%, even more under extreme conditions

   - Add support for PSP encryption of TCP connections; this mechanism
     has some similarities with IPsec and TLS, but offers superior HW
     offloads capabilities

   - Ongoing work to support Accurate ECN for TCP. AccECN allows more
     than one congestion notification signal per RTT and is a building
     block for Low Latency, Low Loss, and Scalable Throughput (L4S)

   - Reorganize the TCP socket binary layout for data locality, reducing
     the number of touched cachelines in the fastpath

   - Refactor skb deferral free to better scale on large multi-NUMA
     hosts, this improves TCP and UDP RX performances significantly on
     such HW

   - Increase the default socket memory buffer limits from 256K to 4M to
     better fit modern link speeds

   - Improve handling of setups with a large number of nexthop, making
     dump operating scaling linearly and avoiding unneeded
     synchronize_rcu() on delete

   - Improve bridge handling of VLAN FDB, storing a single entry per
     bridge instead of one entry per port; this makes the dump order of
     magnitude faster on large switches

   - Restore IP ID correctly for encapsulated packets at GSO
     segmentation time, allowing GRO to merge packets in more scenarios

   - Improve netfilter matching performance on large sets

   - Improve MPTCP receive path performance by leveraging recently
     introduced core infrastructure (skb deferral free) and adopting
     recent TCP autotuning changes

   - Allow bridges to redirect to a backup port when the bridge port is
     administratively down

   - Introduce MPTCP 'laminar' endpoint that con be used only once per
     connection and simplify common MPTCP setups

   - Add RCU safety to dst->dev, closing a lot of possible races

   - A significant crypto library API for SCTP, MPTCP and IPv6 SR,
     reducing code duplication

   - Supports pulling data from an skb frag into the linear area of an
     XDP buffer

  Things we sprinkled into general kernel code:

   - Generate netlink documentation from YAML using an integrated YAML
     parser

  Driver API:

   - Support using IPv6 Flow Label in Rx hash computation and RSS queue
     selection

   - Introduce API for fetching the DMA device for a given queue,
     allowing TCP zerocopy RX on more H/W setups

   - Make XDP helpers compatible with unreadable memory, allowing more
     easily building DevMem-enabled drivers with a unified XDP/skbs
     datapath

   - Add a new dedicated ethtool callback enabling drivers to provide
     the number of RX rings directly, improving efficiency and clarity
     in RX ring queries and RSS configuration

   - Introduce a burst period for the health reporter, allowing better
     handling of multiple errors due to the same root cause

   - Support for DPLL phase offset exponential moving average,
     controlling the average smoothing factor

  Device drivers:

   - Add a new Huawei driver for 3rd gen NIC (hinic3)

   - Add a new SpacemiT driver for K1 ethernet MAC

   - Add a generic abstraction for shared memory communication
     devices (dibps)

   - Ethernet high-speed NICs:
      - nVidia/Mellanox:
         - Use multiple per-queue doorbell, to avoid MMIO contention
           issues
         - support adjacent functions, allowing them to delegate their
           SR-IOV VFs to sibling PFs
         - support RSS for IPSec offload
         - support exposing raw cycle counters in PTP and mlx5
         - support for disabling host PFs.
      - Intel (100G, ice, idpf):
         - ice: support for SRIOV VFs over an Active-Active link
           aggregate
         - ice: support for firmware logging via debugfs
         - ice: support for Earliest TxTime First (ETF) hardware offload
         - idpf: support basic XDP functionalities and XSk
      - Broadcom (bnxt):
         - support Hyper-V VF ID
         - dynamic SRIOV resource allocations for RoCE
      - Meta (fbnic):
         - support queue API, zero-copy Rx and Tx
         - support basic XDP functionalities
         - devlink health support for FW crashes and OTP mem corruptions
         - expand hardware stats coverage to FEC, PHY, and Pause
      - Wangxun:
         - support ethtool coalesce options
         - support for multiple RSS contexts

   - Ethernet virtual:
      - Macsec:
         - replace custom netlink attribute checks with policy-level
           checks
      - Bonding:
         - support aggregator selection based on port priority
      - Microsoft vNIC:
         - use page pool fragments for RX buffers instead of full pages
           to improve memory efficiency

   - Ethernet NICs consumer, and embedded:
      - Qualcomm: support Ethernet function for IPQ9574 SoC
      - Airoha: implement wlan offloading via NPU
      - Freescale
         - enetc: add NETC timer PTP driver and add PTP support
         - fec: enable the Jumbo frame support for i.MX8QM
      - Renesas (R-Car S4):
         - support HW offloading for layer 2 switching
         - support for RZ/{T2H, N2H} SoCs
      - Cadence (macb): support TAPRIO traffic scheduling
      - TI:
         - support for Gigabit ICSS ethernet SoC (icssm-prueth)
      - Synopsys (stmmac): a lot of cleanups

   - Ethernet PHYs:
      - Support 10g-qxgmi phy-mode for AQR412C, Felix DSA and Lynx PCS
        driver
      - Support bcm63268 GPHY power control
      - Support for Micrel lan8842 PHY and PTP
      - Support for Aquantia AQR412 and AQR115

   - CAN:
      - a large CAN-XL preparation work
      - reorganize raw_sock and uniqframe struct to minimize memory
        usage
      - rcar_canfd: update the CAN-FD handling

   - WiFi:
      - extended Neighbor Awareness Networking (NAN) support
      - S1G channel representation cleanup
      - improve S1G support

   - WiFi drivers:
      - Intel (iwlwifi):
         - major refactor and cleanup
      - Broadcom (brcm80211):
         - support for AP isolation
      - RealTek (rtw88/89) rtw88/89:
         - preparation work for RTL8922DE support
      - MediaTek (mt76):
         - HW restart improvements
         - MLO support
      - Qualcomm/Atheros (ath10k):
         - GTK rekey fixes

   - Bluetooth drivers:
      - btusb: support for several new IDs for MT7925
      - btintel: support for BlazarIW core
      - btintel_pcie: support for _suspend() / _resume()
      - btintel_pcie: support for Scorpious, Panther Lake-H484 IDs"

* tag 'net-next-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1536 commits)
  net: stmmac: Add support for Allwinner A523 GMAC200
  dt-bindings: net: sun8i-emac: Add A523 GMAC200 compatible
  Revert "Documentation: net: add flow control guide and document ethtool API"
  octeontx2-pf: fix bitmap leak
  octeontx2-vf: fix bitmap leak
  net/mlx5e: Use extack in set rxfh callback
  net/mlx5e: Introduce mlx5e_rss_params for RSS configuration
  net/mlx5e: Introduce mlx5e_rss_init_params
  net/mlx5e: Remove unused mdev param from RSS indir init
  net/mlx5: Improve QoS error messages with actual depth values
  net/mlx5e: Prevent entering switchdev mode with inconsistent netns
  net/mlx5: HWS, Generalize complex matchers
  net/mlx5: Improve write-combining test reliability for ARM64 Grace CPUs
  selftests/net: add tcp_port_share to .gitignore
  Revert "net/mlx5e: Update and set Xon/Xoff upon MTU set"
  net: add NUMA awareness to skb_attempt_defer_free()
  net: use llist for sd->defer_list
  net: make softnet_data.defer_count an atomic
  selftests: drv-net: psp: add tests for destroying devices
  selftests: drv-net: psp: add test for auto-adjusting TCP MSS
  ...
2025-10-02 15:17:01 -07:00
..
ABI Networking changes for 6.18. 2025-10-02 15:17:01 -07:00
PCI selftests: pci_endpoint: Add doorbell test case 2025-07-24 16:51:47 -05:00
RCU rcu: Document concurrent quiescent state reporting for offline CPUs 2025-07-22 17:10:50 +05:30
accel Documentation: accel: amdxdna: Update compiler information 2025-08-21 08:25:31 -07:00
accounting delaytop: enhance error logging and add PSI feature description 2025-08-02 12:01:41 -07:00
admin-guide Networking changes for 6.18. 2025-10-02 15:17:01 -07:00
arch - Make UMIP instruction detection more robust 2025-09-30 13:19:08 -07:00
block Documentation: ublk: Separate UBLK_F_AUTO_BUF_REG fallback behavior sublists 2025-06-13 09:25:42 -06:00
bpf bpf: disable and remove registers chain based liveness 2025-09-19 09:27:23 -07:00
cdrom cdrom: Call cdrom_mrw_exit from cdrom_release function 2025-07-22 19:10:17 -06:00
core-api module: Rename EXPORT_SYMBOL_GPL_FOR_MODULES to EXPORT_SYMBOL_FOR_MODULES 2025-08-11 16:16:36 +02:00
cpu-freq
crypto crypto: engine - remove {prepare,unprepare}_crypt_hardware callbacks 2025-07-18 20:52:00 +10:00
dev-tools Documentation: kunit: Document new parameterized test features 2025-08-26 23:36:03 -06:00
devicetree Networking changes for 6.18. 2025-10-02 15:17:01 -07:00
doc-guide docs: sphinx: add a file with the requirements for lowest version 2025-06-25 12:22:48 -06:00
driver-api Networking changes for 6.18. 2025-10-02 15:17:01 -07:00
edac
fault-injection docs: fault-injection: drop reference to md-faulty 2025-07-24 08:31:46 -06:00
fb fbdev: sstfb.rst: Fix spelling mistake 2025-05-31 10:24:02 +02:00
features LoongArch: Enable ARCH_SUPPORTS_MSEAL_SYSTEM_MAPPINGS 2025-05-30 21:45:42 +08:00
filesystems for-6.18/block-20250929 2025-10-02 10:16:56 -07:00
firmware-guide Merge branch 'acpi-misc' 2025-07-22 17:12:57 +02:00
firmware_class
fpga
gpu drm next for 6.18-rc1 2025-10-02 12:47:25 -07:00
hid HID: intel-thc-hid: Separate max input size control conditional list 2025-06-20 08:55:52 +02:00
hwmon hwmon: (cros_ec) register fans into thermal framework cooling devices 2025-09-25 08:08:14 -07:00
i2c i2c: i801: Add support for Intel Wildcat Lake-U 2025-09-28 00:45:53 +02:00
iio docs: iio: add ADXL313 accelerometer 2025-07-14 19:20:50 +01:00
images
infiniband
input Input: Add and document BTN_GRIP* 2025-07-27 01:41:20 -07:00
isdn
kbuild Kbuild updates for 6.18 2025-10-01 20:58:51 -07:00
kernel-hacking
leds LEDs for v6.16 2025-06-03 12:10:31 -07:00
litmus-tests
livepatch
locking
maintainer
mhi
misc-devices
mm Summary of significant series in this pull request: 2025-07-31 14:57:54 -07:00
netlabel
netlink Revert "Documentation: net: add flow control guide and document ethtool API" 2025-10-01 09:48:21 +02:00
networking Networking changes for 6.18. 2025-10-02 15:17:01 -07:00
nvdimm
nvme docs: nvme: fix grammar in nvme-pci-endpoint-target.rst 2025-07-17 13:38:07 +02:00
pcmcia
peci
power regulator: consumer.rst: document bulk operations 2025-08-19 16:52:48 +01:00
process Networking changes for 6.18. 2025-10-02 15:17:01 -07:00
rust
scheduler sched_ext: Changes for v6.17 2025-07-31 16:29:46 -07:00
scsi scsi: switch ->bios_param() to passing gendisk 2025-08-13 02:59:28 -04:00
security hardening updates for v6.17-rc1 2025-07-28 17:16:12 -07:00
sound ALSA: doc: improved docs about quirk_flags in snd-usb-audio 2025-09-28 08:35:29 +02:00
sphinx sphinx: parser_yaml.py: fix line numbers information 2025-08-12 07:47:31 +02:00
sphinx-static docs: CSS: make cross-reference links more evident 2025-06-09 14:43:39 -06:00
spi
staging Documentation/staging: Fix typo and incorrect citation in crc32.rst 2025-08-20 23:53:32 -04:00
sunrpc/xdr
target
tee Documentation: tee: Add Qualcomm TEE driver 2025-09-15 17:34:06 +02:00
timers
tools tracing tools changes for 6.17: 2025-08-01 10:23:13 -07:00
trace tracing changes for 6.17 2025-08-01 10:29:36 -07:00
translations Documentation: update Hans Verkuil's email address 2025-09-09 15:58:51 +02:00
usb It has been a relatively busy cycle for docs, especially the build system: 2025-07-31 08:36:51 -07:00
userspace-api Networking changes for 6.18. 2025-10-02 15:17:01 -07:00
virt Documentation: KVM: Use unordered list for pre-init VGIC registers 2025-07-29 13:43:50 -04:00
w1
watchdog
wmi platform/x86: Add lenovo-wmi-* driver Documentation 2025-07-03 10:54:24 +03:00
.gitignore
Changes
CodingStyle
Kconfig
Makefile docs: use parser_yaml extension to handle Netlink specs 2025-08-12 07:47:30 +02:00
SubmittingPatches
atomic_bitops.txt
atomic_t.txt
conf.py docs: use parser_yaml extension to handle Netlink specs 2025-08-12 07:47:30 +02:00
docutils.conf
index.rst
memory-barriers.txt docs/memory-barriers.txt: Add wait_event_cmd() and wait_event_exclusive_cmd() 2025-07-09 10:08:14 -07:00
subsystem-apis.rst