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, 192 insertions, 0 deletions

diff --git a/Documentation/translations/zh_CN/rust/coding-guidelines.rst b/Documentation/translations/zh_CN/rust/coding-guidelines.rst
new file mode 100644
index 000000000..6c0bdbbc5
--- /dev/null
+++ b/Documentation/translations/zh_CN/rust/coding-guidelines.rst
@@ -0,0 +1,192 @@
+.. SPDX-License-Identifier: GPL-2.0
+.. include:: ../disclaimer-zh_CN.rst
+
+:Original: Documentation/rust/coding-guidelines.rst
+
+:翻译:
+
+ 司延腾 Yanteng Si <siyanteng@loongson.cn>
+
+编码指南
+========
+
+本文档描述了如何在内核中编写Rust代码。
+
+
+风格和格式化
+------------
+
+代码应该使用 ``rustfmt`` 进行格式化。这样一来，一个不时为内核做贡献的人就不需要再去学
+习和记忆一个样式指南了。更重要的是，审阅者和维护者不需要再花时间指出风格问题，这样就可以
+减少补丁落地所需的邮件往返。
+
+.. note::  ``rustfmt`` 不检查注释和文档的约定。因此，这些仍然需要照顾到。
+
+使用 ``rustfmt`` 的默认设置。这意味着遵循Rust的习惯性风格。例如，缩进时使用4个空格而
+不是制表符。
+
+在输入、保存或提交时告知编辑器/IDE进行格式化是很方便的。然而，如果因为某些原因需要在某
+个时候重新格式化整个内核Rust的源代码，可以运行以下程序::
+
+	make LLVM=1 rustfmt
+
+也可以检查所有的东西是否都是格式化的（否则就打印一个差异），例如对于一个CI，用::
+
+	make LLVM=1 rustfmtcheck
+
+像内核其他部分的 ``clang-format`` 一样， ``rustfmt`` 在单个文件上工作，并且不需要
+内核配置。有时，它甚至可以与破碎的代码一起工作。
+
+
+注释
+----
+
+“普通”注释（即以 ``//`` 开头，而不是 ``///`` 或 ``//!`` 开头的代码文档）的写法与文
+档注释相同，使用Markdown语法，尽管它们不会被渲染。这提高了一致性，简化了规则，并允许在
+这两种注释之间更容易地移动内容。比如说:
+
+.. code-block:: rust
+
+	// `object` is ready to be handled now.
+	f(object);
+
+此外，就像文档一样，注释在句子的开头要大写，并以句号结束（即使是单句）。这包括 ``// SAFETY:``,
+``// TODO:`` 和其他“标记”的注释，例如:
+
+.. code-block:: rust
+
+	// FIXME: The error should be handled properly.
+
+注释不应该被用于文档的目的：注释是为了实现细节，而不是为了用户。即使源文件的读者既是API
+的实现者又是用户，这种区分也是有用的。事实上，有时同时使用注释和文档是很有用的。例如，用
+于 ``TODO`` 列表或对文档本身的注释。对于后一种情况，注释可以插在中间；也就是说，离要注
+释的文档行更近。对于其他情况，注释会写在文档之后，例如:
+
+.. code-block:: rust
+
+	/// Returns a new [`Foo`].
+	///
+	/// # Examples
+	///
+	// TODO: Find a better example.
+	/// ```
+	/// let foo = f(42);
+	/// ```
+	// FIXME: Use fallible approach.
+	pub fn f(x: i32) -> Foo {
+	    // ...
+	}
+
+一种特殊的注释是 ``// SAFETY:`` 注释。这些注释必须出现在每个 ``unsafe`` 块之前，它们
+解释了为什么该块内的代码是正确/健全的，即为什么它在任何情况下都不会触发未定义行为，例如:
+
+.. code-block:: rust
+
+	// SAFETY: `p` is valid by the safety requirements.
+	unsafe { *p = 0; }
+
+``// SAFETY:`` 注释不能与代码文档中的 ``# Safety`` 部分相混淆。 ``# Safety`` 部
+分指定了（函数）调用者或（特性）实现者需要遵守的契约。
+``// SAFETY:`` 注释显示了为什么一个（函数）调用者或（特性）实现者实际上尊重了
+``# Safety`` 部分或语言参考中的前提条件。
+
+
+代码文档
+--------
+
+Rust内核代码不像C内核代码那样被记录下来（即通过kernel-doc）。取而代之的是用于记录Rust
+代码的常用系统：rustdoc工具，它使用Markdown（一种轻量级的标记语言）。
+
+要学习Markdown，外面有很多指南。例如：
+
+https://commonmark.org/help/
+
+一个记录良好的Rust函数可能是这样的:
+
+.. code-block:: rust
+
+	/// Returns the contained [`Some`] value, consuming the `self` value,
+	/// without checking that the value is not [`None`].
+	///
+	/// # Safety
+	///
+	/// Calling this method on [`None`] is *[undefined behavior]*.
+	///
+	/// [undefined behavior]: https://doc.rust-lang.org/reference/behavior-considered-undefined.html
+	///
+	/// # Examples
+	///
+	/// ```
+	/// let x = Some("air");
+	/// assert_eq!(unsafe { x.unwrap_unchecked() }, "air");
+	/// ```
+	pub unsafe fn unwrap_unchecked(self) -> T {
+	    match self {
+	        Some(val) => val,
+
+	        // SAFETY: The safety contract must be upheld by the caller.
+	        None => unsafe { hint::unreachable_unchecked() },
+	    }
+	}
+
+这个例子展示了一些 ``rustdoc`` 的特性和内核中遵循的一些惯例:
+
+  - 第一段必须是一个简单的句子，简要地描述被记录的项目的作用。进一步的解释必须放在额
+    外的段落中。
+
+  - 不安全的函数必须在 ``# Safety`` 部分记录其安全前提条件。
+
+  - 虽然这里没有显示，但如果一个函数可能会恐慌，那么必须在 ``# Panics`` 部分描述发
+    生这种情况的条件。
+
+    请注意，恐慌应该是非常少见的，只有在有充分理由的情况下才会使用。几乎在所有的情况下，
+    都应该使用一个可失败的方法，通常是返回一个 ``Result``。
+
+  - 如果提供使用实例对读者有帮助的话，必须写在一个叫做``# Examples``的部分。
+
+  - Rust项目（函数、类型、常量……）必须有适当的链接(``rustdoc`` 会自动创建一个
+    链接)。
+
+  - 任何 ``unsafe`` 的代码块都必须在前面加上一个 ``// SAFETY:`` 的注释，描述里面
+    的代码为什么是正确的。
+
+    虽然有时原因可能看起来微不足道，但写这些注释不仅是记录已经考虑到的问题的好方法，
+    最重要的是，它提供了一种知道没有额外隐含约束的方法。
+
+要了解更多关于如何编写Rust和拓展功能的文档，请看看 ``rustdoc`` 这本书，网址是:
+
+	https://doc.rust-lang.org/rustdoc/how-to-write-documentation.html
+
+
+命名
+----
+
+Rust内核代码遵循通常的Rust命名空间:
+
+	https://rust-lang.github.io/api-guidelines/naming.html
+
+当现有的C语言概念（如宏、函数、对象......）被包装成Rust抽象时，应该使用尽可能接近C语
+言的名称，以避免混淆，并在C语言和Rust语言之间来回切换时提高可读性。例如，C语言中的
+``pr_info`` 这样的宏在Rust中的命名是一样的。
+
+说到这里，应该调整大小写以遵循Rust的命名惯例，模块和类型引入的命名间隔不应该在项目名称
+中重复。例如，在包装常量时，如:
+
+.. code-block:: c
+
+	#define GPIO_LINE_DIRECTION_IN	0
+	#define GPIO_LINE_DIRECTION_OUT	1
+
+在Rust中的等价物可能是这样的（忽略文档）。:
+
+.. code-block:: rust
+
+	pub mod gpio {
+	    pub enum LineDirection {
+	        In = bindings::GPIO_LINE_DIRECTION_IN as _,
+	        Out = bindings::GPIO_LINE_DIRECTION_OUT as _,
+	    }
+	}
+
+也就是说， ``GPIO_LINE_DIRECTION_IN`` 的等价物将被称为 ``gpio::LineDirection::In`` 。
+特别是，它不应该被命名为 ``gpio::gpio_line_direction::GPIO_LINE_DIRECTION_IN`` 。