Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 156 insertions, 0 deletions

diff --git a/Documentation/translations/zh_CN/core-api/refcount-vs-atomic.rst b/Documentation/translations/zh_CN/core-api/refcount-vs-atomic.rst
new file mode 100644
index 000000000..e2467fd26
--- /dev/null
+++ b/Documentation/translations/zh_CN/core-api/refcount-vs-atomic.rst
@@ -0,0 +1,156 @@
+.. include:: ../disclaimer-zh_CN.rst
+
+:Original: Documentation/core-api/refcount-vs-atomic.rst
+
+:翻译:
+
+ 司延腾 Yanteng Si <siyanteng@loongson.cn>
+
+.. _cn_refcount-vs-atomic:
+
+=======================================
+与atomic_t相比，refcount_t的API是这样的
+=======================================
+
+.. contents:: :local:
+
+简介
+====
+
+refcount_t API的目标是为实现对象的引用计数器提供一个最小的API。虽然来自
+lib/refcount.c的独立于架构的通用实现在下面使用了原子操作，但一些 ``refcount_*()``
+和 ``atomic_*()`` 函数在内存顺序保证方面有很多不同。本文档概述了这些差异，并
+提供了相应的例子，以帮助开发者根据这些内存顺序保证的变化来验证他们的代码。
+
+本文档中使用的术语尽量遵循tools/memory-model/Documentation/explanation.txt
+中定义的正式LKMM。
+
+memory-barriers.txt和atomic_t.txt提供了更多关于内存顺序的背景，包括通用的
+和针对原子操作的。
+
+内存顺序的相关类型
+==================
+
+.. note:: 下面的部分只涵盖了本文使用的与原子操作和引用计数器有关的一些内存顺
+   序类型。如果想了解更广泛的情况，请查阅memory-barriers.txt文件。
+
+在没有任何内存顺序保证的情况下（即完全无序），atomics和refcounters只提供原
+子性和程序顺序（program order, po）关系（在同一个CPU上）。它保证每个
+``atomic_* ()`` 和 ``refcount_*()`` 操作都是原子性的，指令在单个CPU上按程序
+顺序执行。这是用READ_ONCE()/WRITE_ONCE()和比较并交换原语实现的。
+
+强（完全）内存顺序保证在同一CPU上的所有较早加载和存储的指令（所有程序顺序较早
+[po-earlier]指令）在执行任何程序顺序较后指令（po-later）之前完成。它还保证
+同一CPU上储存的程序优先较早的指令和来自其他CPU传播的指令必须在该CPU执行任何
+程序顺序较后指令之前传播到其他CPU（A-累积属性）。这是用smp_mb()实现的。
+
+RELEASE内存顺序保证了在同一CPU上所有较早加载和存储的指令（所有程序顺序较早
+指令）在此操作前完成。它还保证同一CPU上储存的程序优先较早的指令和来自其他CPU
+传播的指令必须在释放（release）操作之前传播到所有其他CPU（A-累积属性）。这是用
+smp_store_release()实现的。
+
+ACQUIRE内存顺序保证了同一CPU上的所有后加载和存储的指令（所有程序顺序较后
+指令）在获取（acquire）操作之后完成。它还保证在获取操作执行后，同一CPU上
+储存的所有程序顺序较后指令必须传播到所有其他CPU。这是用
+smp_acquire__after_ctrl_dep()实现的。
+
+对Refcounters的控制依赖（取决于成功）保证了如果一个对象的引用被成功获得（引用计数
+器的增量或增加行为发生了，函数返回true），那么进一步的存储是针对这个操作的命令。对存
+储的控制依赖没有使用任何明确的屏障来实现，而是依赖于CPU不对存储进行猜测。这只是
+一个单一的CPU关系，对其他CPU不提供任何保证。
+
+
+函数的比较
+==========
+
+情况1） - 非 “读/修改/写”（RMW）操作
+------------------------------------
+
+函数变化:
+
+ * atomic_set() --> refcount_set()
+ * atomic_read() --> refcount_read()
+
+内存顺序保证变化:
+
+ * none (两者都是完全无序的)
+
+
+情况2） - 基于增量的操作，不返回任何值
+--------------------------------------
+
+函数变化:
+
+ * atomic_inc() --> refcount_inc()
+ * atomic_add() --> refcount_add()
+
+内存顺序保证变化:
+
+ * none (两者都是完全无序的)
+
+情况3） - 基于递减的RMW操作，没有返回值
+---------------------------------------
+
+函数变化:
+
+ * atomic_dec() --> refcount_dec()
+
+内存顺序保证变化:
+
+ * 完全无序的 --> RELEASE顺序
+
+
+情况4） - 基于增量的RMW操作，返回一个值
+---------------------------------------
+
+函数变化:
+
+ * atomic_inc_not_zero() --> refcount_inc_not_zero()
+ * 无原子性对应函数 --> refcount_add_not_zero()
+
+内存顺序保证变化:
+
+ * 完全有序的 --> 控制依赖于存储的成功
+
+.. note:: 此处 **假设** 了，必要的顺序是作为获得对象指针的结果而提供的。
+
+
+情况 5） - 基于Dec/Sub递减的通用RMW操作，返回一个值
+---------------------------------------------------
+
+函数变化:
+
+ * atomic_dec_and_test() --> refcount_dec_and_test()
+ * atomic_sub_and_test() --> refcount_sub_and_test()
+
+内存顺序保证变化:
+
+ * 完全有序的 --> RELEASE顺序 + 成功后ACQUIRE顺序
+
+
+情况6）其他基于递减的RMW操作，返回一个值
+----------------------------------------
+
+函数变化:
+
+ * 无原子性对应函数 --> refcount_dec_if_one()
+ * ``atomic_add_unless(&var, -1, 1)`` --> ``refcount_dec_not_one(&var)``
+
+内存顺序保证变化:
+
+ * 完全有序的 --> RELEASE顺序 + 控制依赖
+
+.. note:: atomic_add_unless()只在执行成功时提供完整的顺序。
+
+
+情况7）--基于锁的RMW
+--------------------
+
+函数变化:
+
+ * atomic_dec_and_lock() --> refcount_dec_and_lock()
+ * atomic_dec_and_mutex_lock() --> refcount_dec_and_mutex_lock()
+
+内存顺序保证变化:
+
+ * 完全有序 --> RELEASE顺序 + 控制依赖 + 持有