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, 238 insertions, 0 deletions

diff --git a/Documentation/translations/zh_CN/doc-guide/contributing.rst b/Documentation/translations/zh_CN/doc-guide/contributing.rst
new file mode 100644
index 000000000..394a13b43
--- /dev/null
+++ b/Documentation/translations/zh_CN/doc-guide/contributing.rst
@@ -0,0 +1,238 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+.. include:: ../disclaimer-zh_CN.rst
+
+:Original: Documentation/doc-guide/contributing.rst
+
+:译者: 吴想成 Wu XiangCheng <bobwxc@email.cn>
+
+如何帮助改进内核文档
+====================
+
+在任何软件开发项目中，文档都是重要组成部分。好的文档有助于引入新的开发人员，
+并帮助已有的开发人员更有效地工作。如果缺少高质量的文档，大量的时间就会浪费在
+代码的逆向工程和犯本可避免的错误上。
+
+不幸的是，内核的文档目前远远不能满足支持如此规模和重要性的项目的需要。
+
+本指南适用于希望帮助改善这种状况的贡献者。内核文档的改进可以由开发者在不同的
+技能层级上进行；这也是一条相对简单可以帮助您了解内核过程并在社区中找到一席之
+地的路径。下面的大部分内容是文档维护人员列出的最迫切需要完成的任务。
+
+文档待办事项列表
+----------------
+
+为了使我们的文档达到应有的水平，需要完成的任务数不胜数。此列表包含许多重要的
+项目，但还远远不够详尽；如果您知道改进文档的其他方法，请不要羞于启齿。
+
+消除警告（WARNING）
+~~~~~~~~~~~~~~~~~~~
+
+文档构建目前出现了数量惊人的警告。虱子多了不痒，债多了不愁；大伙儿忽略了它们，
+他们永远不会注意到他们的工作增加了新的警告。因此，消除警告是文档待办事项列表
+中优先级最高的任务之一。这项任务本身相当简单，但必须以正确的方式进行，才能取
+得成功。
+
+C代码编译器发出的警告常常会被视为误报，从而导致出现了旨在让编译器闭嘴的补丁。
+文档构建中的警告几乎总是指向真正的问题；要消除这些警告，需要理解问题并从源头上
+解决问题。因此，修复文档警告的补丁不应在标题中直接写“修复警告”；它们应该指明
+真正修复的问题。
+
+另一个重点是，文档警告常常由C代码里kernel-doc注释中的问题引起。虽然文档维护
+人员对收到这些修复补丁的副本表示感谢，但是文档树实际上通常并不适合接受这些
+补丁；它们应该被交给相关子系统的维护人员。
+
+例如，在一次文档构建中，我几乎是随意选取了一对警告::
+
+  ./drivers/devfreq/devfreq.c:1818: warning: bad line:
+  	- Resource-managed devfreq_register_notifier()
+  ./drivers/devfreq/devfreq.c:1854: warning: bad line:
+  	- Resource-managed devfreq_unregister_notifier()
+
+（作了断行以便于阅读）
+
+简单看一下上面给出的源文件，会发现几个kernel-doc注释，如下所示::
+
+  /**
+   * devm_devfreq_register_notifier()
+   	- Resource-managed devfreq_register_notifier()
+   * @dev:	The devfreq user device. (parent of devfreq)
+   * @devfreq:	The devfreq object.
+   * @nb:	The notifier block to be unregistered.
+   * @list:	DEVFREQ_TRANSITION_NOTIFIER.
+   */
+
+问题在于缺了一个“*”，这不符合构建系统对C注释块的格式要求。此问题自2016年注释
+被添加以来一直存在——整整四年之久。修复它只需要添加丢失的星号。看一眼该文件的
+历史记录以了解主题行的常规格式是什么样，再使用 ``scripts/get_maintainer.pl``
+来搞清谁应当收到此补丁。生成的补丁如下所示::
+
+  [PATCH] PM / devfreq: Fix two malformed kerneldoc comments
+
+  Two kerneldoc comments in devfreq.c fail to adhere to the required format,
+  resulting in these doc-build warnings:
+
+    ./drivers/devfreq/devfreq.c:1818: warning: bad line:
+  	  - Resource-managed devfreq_register_notifier()
+    ./drivers/devfreq/devfreq.c:1854: warning: bad line:
+  	  - Resource-managed devfreq_unregister_notifier()
+
+  Add a couple of missing asterisks and make kerneldoc a little happier.
+
+  Signed-off-by: Jonathan Corbet <corbet@lwn.net>
+  ---
+   drivers/devfreq/devfreq.c | 4 ++--
+   1 file changed, 2 insertions(+), 2 deletions(-)
+
+  diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
+  index 57f6944d65a6..00c9b80b3d33 100644
+  --- a/drivers/devfreq/devfreq.c
+  +++ b/drivers/devfreq/devfreq.c
+  @@ -1814,7 +1814,7 @@ static void devm_devfreq_notifier_release(struct device *dev, void *res)
+
+   /**
+    * devm_devfreq_register_notifier()
+  -	- Resource-managed devfreq_register_notifier()
+  + *	- Resource-managed devfreq_register_notifier()
+    * @dev:	The devfreq user device. (parent of devfreq)
+    * @devfreq:	The devfreq object.
+    * @nb:		The notifier block to be unregistered.
+  @@ -1850,7 +1850,7 @@ EXPORT_SYMBOL(devm_devfreq_register_notifier);
+
+   /**
+    * devm_devfreq_unregister_notifier()
+  -	- Resource-managed devfreq_unregister_notifier()
+  + *	- Resource-managed devfreq_unregister_notifier()
+    * @dev:	The devfreq user device. (parent of devfreq)
+    * @devfreq:	The devfreq object.
+    * @nb:		The notifier block to be unregistered.
+  --
+  2.24.1
+
+整个过程只花了几分钟。当然，我后来发现有人在另一个树中修复了它，这亮出了另一
+个教训：在深入研究问题之前，一定要检查linux-next树，看看问题是否已经修复。
+
+其他修复可能需要更长的时间，尤其是那些与缺少文档的结构体成员或函数参数相关的
+修复。这种情况下，需要找出这些成员或参数的作用，并正确描述它们。总之，这种
+任务有时会有点乏味，但它非常重要。如果我们真的可以从文档构建中消除警告，那么
+我们就可以开始期望开发人员开始注意避免添加新的警告了。
+
+“迷失的”kernel-doc注释
+~~~~~~~~~~~~~~~~~~~~~~
+
+开发者被鼓励去为他们的代码写kernel-doc注释，但是许多注释从未被引入文档构建。
+这使得这些信息更难找到，例如使Sphinx无法生成指向该文档的链接。将 ``kernel-doc``
+指令添加到文档中以引入这些注释可以帮助社区获得为编写注释所做工作的全部价值。
+
+``scripts/find-unused-docs.sh`` 工具可以用来找到这些被忽略的评论。
+
+请注意，将导出的函数和数据结构引入文档是最有价值的。许多子系统还具有供内部
+使用的kernel-doc注释；除非这些注释放在专门针对相关子系统开发人员的文档中，
+否则不应将其引入文档构建中。
+
+
+修正错字
+~~~~~~~~
+
+
+修复文档中的排版或格式错误是一种快速学习如何创建和发送修补程序的方法，也是
+一项有用的服务。我总是愿意接受这样的补丁。这也意味着，一旦你修复了一些这种
+错误，请考虑转移到更高级的任务，留下一些拼写错误给下一个初学者解决。
+
+请注意，有些并 **不是** 拼写错误，不应该被“修复”：
+
+ - 内核文档中用美式和英式英语拼写皆可，没有必要互相倒换。
+
+ - 在内核文档中，没必要讨论句点后面应该跟一个还是两个空格的问题。其他一些有
+   合理分歧的地方，比如“牛津逗号”，在这也是跑题的。
+
+与对任何项目的任何补丁一样，请考虑您的更改是否真的让事情变得更好。
+
+“上古”文档
+~~~~~~~~~~
+
+一些内核文档是最新的、被维护的，并且非常有用，有些文件确并非如此。尘封、陈旧
+和不准确的文档可能会误导读者，并对我们的整个文档产生怀疑。任何解决这些问题的
+事情都是非常受欢迎的。
+
+无论何时处理文档，请考虑它是否是最新的，是否需要更新，或者是否应该完全删除。
+您可以注意以下几个警告标志：
+
+ - 对2.x内核的引用
+ - 指向SourceForge存储库
+ - 历史记录除了拼写错误啥也没有持续几年
+ - 讨论Git之前时代的工作流
+
+当然，最好的办法是更新文档，添加所需的任何信息。这样的工作通常需要与熟悉相关
+子系统的开发人员合作。当有人善意地询问开发人员，并听取他们的回答然后采取
+行动时，开发人员通常更愿意与这些致力于改进文档的人员合作。
+
+有些文档已经没希望了；例如，我们偶尔会发现引用了很久以前从内核中删除的代码的
+文档。删除过时的文档会碰见令人惊讶的阻力，但我们无论如何都应该这样做。文档中
+多余的粗枝大叶对任何人都没有帮助。
+
+如果一个严重过时的文档中可能有一些有用的信息，而您又无法更新它，那么最好在
+开头添加一个警告。建议使用以下文本::
+
+  .. warning ::
+  	This document is outdated and in need of attention.  Please use
+  	this information with caution, and please consider sending patches
+  	to update it.
+
+这样的话，至少我们长期受苦的读者会得到文件可能会把他们引入歧途的警告。
+
+文档一致性
+~~~~~~~~~~
+
+这里的老前辈们会记得上世纪90年代出现在书架上的Linux书籍，它们只是从网上不同
+位置搜来的文档文件的集合。在此之后，（大部分）这些书都得到了改进，但是内核的
+文档仍然主要是建立在这种模型上。它有数千个文件，几乎每个文件都是与其他文件相
+独立编写的。我们没有一个连贯的内核文档；只有数千个独立的文档。
+
+我们一直试图通过编篡一套“书籍”来改善这种情况，以为特定读者提供成套文档。这
+包括：
+
+ - Documentation/translations/zh_CN/admin-guide/index.rst
+ - Documentation/core-api/index.rst
+ - Documentation/driver-api/index.rst
+ - Documentation/userspace-api/index.rst
+
+以及文档本身这本“书”。
+
+将文档移到适当的书中是一项重要的任务，需要继续进行。不过这项工作还是有一些
+挑战性。移动文档会给处理这些文档的人带来短期的痛苦；他们对这些更改无甚热情
+也是可以理解的。通常情况下，可以将一个文档移动一下；不过我们真的不想一直移动
+它们。
+
+即使所有文件都在正确的位置，我们也只是把一大堆文件变成一群小堆文件。试图将
+所有这些文件组合成一个整体的工作尚未开始。如果你对如何在这方面取得进展有好的
+想法，我们将很高兴了解。
+
+样式表（Stylesheet）改进
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+随着Sphinx的采用，我们得到了比以前更好的HTML输出。但它仍然需要很大的改进；
+Donald Knuth和Edward Tufte可能是映像平平的。这需要调整我们的样式表，以创建
+更具排版效果、可访问性和可读性的输出。
+
+请注意：如果你承担这个任务，你将进入经典的两难领域。即使是相对明显的变化，
+也会有很多意见和讨论。唉，这就是我们生活的世界的本质。
+
+无LaTeX的PDF构建
+~~~~~~~~~~~~~~~~
+
+对于拥有大量时间和Python技能的人来说，这绝对是一项不平凡的任务。Sphinx工具链
+相对较小且包含良好；很容易添加到开发系统中。但是构建PDF或EPUB输出需要安装
+LaTeX，它绝对称不上小或包含良好的。消除Latex将是一件很好的事情。
+
+最初是希望使用 `rst2pdf <https://rst2pdf.org/>`_ 工具来生成PDF，但结果发现
+无法胜任这项任务。不过rst2pdf的开发工作最近似乎又有了起色，这是个充满希望的
+迹象。如果有开发人员愿意与该项目合作，使rst2pdf可与内核文档构建一起工作，
+大家会非常感激。
+
+编写更多文档
+~~~~~~~~~~~~
+
+当然，内核中许多部分的文档严重不足。如果您有编写一个特定内核子系统文档的相应
+知识并愿意这样做，请不要犹豫，编写并向内核贡献结果吧！数不清的内核开发人员和
+用户会感谢你。