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, 134 insertions, 0 deletions

diff --git a/Documentation/translations/zh_CN/dev-tools/testing-overview.rst b/Documentation/translations/zh_CN/dev-tools/testing-overview.rst
new file mode 100644
index 000000000..d6f2c65ed
--- /dev/null
+++ b/Documentation/translations/zh_CN/dev-tools/testing-overview.rst
@@ -0,0 +1,134 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+.. include:: ../disclaimer-zh_CN.rst
+
+:Original: Documentation/dev-tools/testing-overview.rst
+:Translator: 胡皓文 Hu Haowen <src.res@email.cn>
+
+============
+内核测试指南
+============
+
+有许多不同的工具可以用于测试Linux内核，因此了解什么时候使用它们可能
+很困难。本文档粗略概述了它们之间的区别，并阐释了它们是怎样糅合在一起
+的。
+
+编写和运行测试
+==============
+
+大多数内核测试都是用kselftest或KUnit框架之一编写的。它们都让运行测试
+更加简化，并为编写新测试提供帮助。
+
+如果你想验证内核的行为——尤其是内核的特定部分——那你就要使用kUnit或
+kselftest。
+
+KUnit和kselftest的区别
+----------------------
+
+.. note::
+     由于本文段中部分术语尚无较好的对应中文释义，可能导致与原文含义
+     存在些许差异，因此建议读者结合原文
+     （Documentation/dev-tools/testing-overview.rst）辅助阅读。
+     如对部分翻译有异议或有更好的翻译意见，欢迎联系译者进行修订。
+
+KUnit（Documentation/dev-tools/kunit/index.rst）是用于“白箱”测
+试的一个完整的内核内部系统：因为测试代码是内核的一部分，所以它能够访
+问用户空间不能访问到的内部结构和功能。
+
+因此，KUnit测试最好针对内核中较小的、自包含的部分，以便能够独立地测
+试。“单元”测试的概念亦是如此。
+
+比如，一个KUnit测试可能测试一个单独的内核功能（甚至通过一个函数测试
+一个单一的代码路径，例如一个错误处理案例），而不是整个地测试一个特性。
+
+这也使得KUnit测试构建和运行非常地快，从而能够作为开发流程的一部分被
+频繁地运行。
+
+有关更详细的介绍，请参阅KUnit测试代码风格指南
+Documentation/dev-tools/kunit/style.rst
+
+kselftest（Documentation/dev-tools/kselftest.rst），相对来说，大量用
+于用户空间，并且通常测试用户空间的脚本或程序。
+
+这使得编写复杂的测试，或者需要操作更多全局系统状态的测试更加容易（诸
+如生成进程之类）。然而，从kselftest直接调用内核函数是不行的。这也就
+意味着只有通过某种方式（如系统调用、驱动设备、文件系统等）导出到了用
+户空间的内核功能才能使用kselftest来测试。为此，有些测试包含了一个伴
+生的内核模块用于导出更多的信息和功能。不过，对于基本上或者完全在内核
+中运行的测试，KUnit可能是更佳工具。
+
+kselftest也因此非常适合于全部功能的测试，因为这些功能会将接口暴露到
+用户空间，从而能够被测试，而不是展现实现细节。“system”测试和
+“end-to-end”测试亦是如此。
+
+比如，一个新的系统调用应该伴随有新的kselftest测试。
+
+代码覆盖率工具
+==============
+
+支持两种不同代码之间的覆盖率测量工具。它们可以用来验证一项测试执行的
+确切函数或代码行。这有助于决定内核被测试了多少，或用来查找合适的测试
+中没有覆盖到的极端情况。
+
+Documentation/translations/zh_CN/dev-tools/gcov.rst 是GCC的覆盖率测试
+工具，能用于获取内核的全局或每个模块的覆盖率。与KCOV不同的是，这个工具
+不记录每个任务的覆盖率。覆盖率数据可以通过debugfs读取，并通过常规的
+gcov工具进行解释。
+
+Documentation/dev-tools/kcov.rst 是能够构建在内核之中，用于在每个任务
+的层面捕捉覆盖率的一个功能。因此，它对于模糊测试和关于代码执行期间信
+息的其它情况非常有用，比如在一个单一系统调用里使用它就很有用。
+
+动态分析工具
+============
+
+内核也支持许多动态分析工具，用以检测正在运行的内核中出现的多种类型的
+问题。这些工具通常每个去寻找一类不同的缺陷，比如非法内存访问，数据竞
+争等并发问题，或整型溢出等其他未定义行为。
+
+如下所示：
+
+* kmemleak检测可能的内存泄漏。参阅
+  Documentation/dev-tools/kmemleak.rst
+* KASAN检测非法内存访问，如数组越界和释放后重用（UAF）。参阅
+  Documentation/dev-tools/kasan.rst
+* UBSAN检测C标准中未定义的行为，如整型溢出。参阅
+  Documentation/dev-tools/ubsan.rst
+* KCSAN检测数据竞争。参阅 Documentation/dev-tools/kcsan.rst
+* KFENCE是一个低开销的内存问题检测器，比KASAN更快且能被用于批量构建。
+  参阅 Documentation/dev-tools/kfence.rst
+* lockdep是一个锁定正确性检测器。参阅
+  Documentation/locking/lockdep-design.rst
+* 除此以外，在内核中还有一些其它的调试工具，大多数能在
+  lib/Kconfig.debug 中找到。
+
+这些工具倾向于对内核进行整体测试，并且不像kselftest和KUnit一样“传递”。
+它们可以通过在启用这些工具时运行内核测试以与kselftest或KUnit结合起来：
+之后你就能确保这些错误在测试过程中都不会发生了。
+
+一些工具与KUnit和kselftest集成，并且在检测到问题时会自动打断测试。
+
+静态分析工具
+============
+
+除了测试运行中的内核，我们还可以使用**静态分析**工具直接分析内核的源代
+码（**在编译时**）。内核中常用的工具允许人们检查整个源代码树或其中的特
+定文件。它们使得在开发过程中更容易发现和修复问题。
+
+ Sparse可以通过执行类型检查、锁检查、值范围检查来帮助测试内核，此外还
+ 可以在检查代码时报告各种错误和警告。关于如何使用它的细节，请参阅
+ Documentation/translations/zh_CN/dev-tools/sparse.rst。
+
+ Smatch扩展了Sparse，并提供了对编程逻辑错误的额外检查，如开关语句中
+ 缺少断点，错误检查中未使用的返回值，忘记在错误路径的返回中设置错误代
+ 码等。Smatch也有针对更严重问题的测试，如整数溢出、空指针解除引用和内
+ 存泄漏。见项目页面http://smatch.sourceforge.net/。
+
+ Coccinelle是我们可以使用的另一个静态分析器。Coccinelle经常被用来
+ 帮助源代码的重构和并行演化，但它也可以帮助避免常见代码模式中出现的某
+ 些错误。可用的测试类型包括API测试、内核迭代器的正确使用测试、自由操
+ 作的合理性检查、锁定行为的分析，以及已知的有助于保持内核使用一致性的
+ 进一步测试。详情请见Documentation/dev-tools/coccinelle.rst。
+
+ 不过要注意的是，静态分析工具存在**假阳性**的问题。在试图修复错误和警
+ 告之前，需要仔细评估它们。