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, 264 insertions, 0 deletions

diff --git a/Documentation/translations/zh_CN/dev-tools/gcov.rst b/Documentation/translations/zh_CN/dev-tools/gcov.rst
new file mode 100644
index 000000000..3158c9da1
--- /dev/null
+++ b/Documentation/translations/zh_CN/dev-tools/gcov.rst
@@ -0,0 +1,264 @@
+.. include:: ../disclaimer-zh_CN.rst
+
+:Original: Documentation/dev-tools/gcov.rst
+:Translator: 赵军奎 Bernard Zhao <bernard@vivo.com>
+
+在Linux内核里使用gcov做代码覆盖率检查
+=====================================
+
+gcov分析核心支持在Linux内核中启用GCC的覆盖率测试工具 gcov_ ，Linux内核
+运行时的代码覆盖率数据会以gcov兼容的格式导出到“gcov”debugfs目录中，可
+以通过gcov的 ``-o`` 选项（如下示例）获得指定文件的代码运行覆盖率统计数据
+（需要跳转到内核编译路径下并且要有root权限）::
+
+    # cd /tmp/linux-out
+    # gcov -o /sys/kernel/debug/gcov/tmp/linux-out/kernel spinlock.c
+
+这将在当前目录中创建带有执行计数注释的源代码文件。
+在获得这些统计文件后，可以使用图形化的gcov前端工具（比如 lcov_ ），来实现
+自动化处理Linux内核的覆盖率运行数据，同时生成易于阅读的HTML格式文件。
+
+可能的用途:
+
+* 调试（用来判断每一行的代码是否已经运行过）
+* 测试改进（如何修改测试代码，尽可能地覆盖到没有运行过的代码）
+* 内核最小化配置（对于某一个选项配置，如果关联的代码从来没有运行过，
+  是否还需要这个配置）
+
+.. _gcov: https://gcc.gnu.org/onlinedocs/gcc/Gcov.html
+.. _lcov: http://ltp.sourceforge.net/coverage/lcov.php
+
+
+准备
+----
+
+内核打开如下配置::
+
+        CONFIG_DEBUG_FS=y
+        CONFIG_GCOV_KERNEL=y
+
+获取整个内核的覆盖率数据，还需要打开::
+
+        CONFIG_GCOV_PROFILE_ALL=y
+
+需要注意的是，整个内核开启覆盖率统计会造成内核镜像文件尺寸的增大，
+同时内核运行也会变慢一些。
+另外，并不是所有的架构都支持整个内核开启覆盖率统计。
+
+代码运行覆盖率数据只在debugfs挂载完成后才可以访问::
+
+        mount -t debugfs none /sys/kernel/debug
+
+
+定制化
+------
+
+如果要单独针对某一个路径或者文件进行代码覆盖率统计，可以在内核相应路
+径的Makefile中增加如下的配置:
+
+- 单独统计单个文件（例如main.o）::
+
+    GCOV_PROFILE_main.o := y
+
+- 单独统计某一个路径::
+
+    GCOV_PROFILE := y
+
+如果要在整个内核的覆盖率统计（开启CONFIG_GCOV_PROFILE_ALL）中单独排除
+某一个文件或者路径，可以使用如下的方法::
+
+    GCOV_PROFILE_main.o := n
+
+和::
+
+    GCOV_PROFILE := n
+
+此机制仅支持链接到内核镜像或编译为内核模块的文件。
+
+
+相关文件
+--------
+
+gcov功能需要在debugfs中创建如下文件:
+
+``/sys/kernel/debug/gcov``
+    gcov相关功能的根路径
+
+``/sys/kernel/debug/gcov/reset``
+    全局复位文件:向该文件写入数据后会将所有的gcov统计数据清0
+
+``/sys/kernel/debug/gcov/path/to/compile/dir/file.gcda``
+    gcov工具可以识别的覆盖率统计数据文件，向该文件写入数据后
+	  会将本文件的gcov统计数据清0
+
+``/sys/kernel/debug/gcov/path/to/compile/dir/file.gcno``
+    gcov工具需要的软连接文件（指向编译时生成的信息统计文件），这个文件是
+    在gcc编译时如果配置了选项 ``-ftest-coverage`` 时生成的。
+
+
+针对模块的统计
+--------------
+
+内核中的模块会动态的加载和卸载，模块卸载时对应的数据会被清除掉。
+gcov提供了一种机制，通过保留相关数据的副本来收集这部分卸载模块的覆盖率数据。
+模块卸载后这些备份数据在debugfs中会继续存在。
+一旦这个模块重新加载，模块关联的运行统计会被初始化成debugfs中备份的数据。
+
+可以通过对内核参数gcov_persist的修改来停用gcov对模块的备份机制::
+
+        gcov_persist = 0
+
+在运行时，用户还可以通过写入模块的数据文件或者写入gcov复位文件来丢弃已卸
+载模块的数据。
+
+
+编译机和测试机分离
+------------------
+
+gcov的内核分析插桩支持内核的编译和运行是在同一台机器上，也可以编译和运
+行是在不同的机器上。
+如果内核编译和运行是不同的机器，那么需要额外的准备工作，这取决于gcov工具
+是在哪里使用的:
+
+.. _gcov-test_zh:
+
+a) 若gcov运行在测试机上
+
+    测试机上面gcov工具的版本必须要跟内核编译机器使用的gcc版本相兼容，
+    同时下面的文件要从编译机拷贝到测试机上:
+
+    从源代码中:
+      - 所有的C文件和头文件
+
+    从编译目录中:
+      - 所有的C文件和头文件
+      - 所有的.gcda文件和.gcno文件
+      - 所有目录的链接
+
+    特别需要注意，测试机器上面的目录结构跟编译机器上面的目录机构必须
+    完全一致。
+    如果文件是软链接，需要替换成真正的目录文件（这是由make的当前工作
+    目录变量CURDIR引起的）。
+
+.. _gcov-build_zh:
+
+b) 若gcov运行在编译机上
+
+    测试用例运行结束后，如下的文件需要从测试机中拷贝到编译机上:
+
+    从sysfs中的gcov目录中:
+      - 所有的.gcda文件
+      - 所有的.gcno文件软链接
+
+    这些文件可以拷贝到编译机的任意目录下，gcov使用-o选项指定拷贝的
+    目录。
+
+    比如一个是示例的目录结构如下::
+
+      /tmp/linux:    内核源码目录
+      /tmp/out:      内核编译文件路径（make O=指定）
+      /tmp/coverage: 从测试机器上面拷贝的数据文件路径
+
+      [user@build] cd /tmp/out
+      [user@build] gcov -o /tmp/coverage/tmp/out/init main.c
+
+
+关于编译器的注意事项
+--------------------
+
+GCC和LLVM gcov工具不一定兼容。
+如果编译器是GCC，使用 gcov_ 来处理.gcno和.gcda文件，如果是Clang编译器，
+则使用 llvm-cov_ 。
+
+.. _gcov: https://gcc.gnu.org/onlinedocs/gcc/Gcov.html
+.. _llvm-cov: https://llvm.org/docs/CommandGuide/llvm-cov.html
+
+GCC和Clang gcov之间的版本差异由Kconfig处理的。
+kconfig会根据编译工具链的检查自动选择合适的gcov格式。
+
+问题定位
+--------
+
+可能出现的问题1
+    编译到链接阶段报错终止
+
+问题原因
+    分析标志指定在了源文件但是没有链接到主内核，或者客制化了链接程序
+
+解决方法
+    通过在相应的Makefile中使用 ``GCOV_PROFILE := n``
+    或者 ``GCOV_PROFILE_basename.o := n`` 来将链接报错的文件排除掉
+
+可能出现的问题2
+    从sysfs复制的文件显示为空或不完整
+
+问题原因
+    由于seq_file的工作方式，某些工具（例如cp或tar）可能无法正确地从
+    sysfs复制文件。
+
+解决方法
+    使用 ``cat`` 读取 ``.gcda`` 文件，使用 ``cp -d`` 复制链接，或者使用附录B
+    中所示的机制。
+
+
+附录A：collect_on_build.sh
+--------------------------
+
+用于在编译机上收集覆盖率元文件的示例脚本
+（见 :ref:`编译机和测试机分离 a. <gcov-test_zh>` ）
+
+.. code-block:: sh
+
+    #!/bin/bash
+
+    KSRC=$1
+    KOBJ=$2
+    DEST=$3
+
+    if [ -z "$KSRC" ] || [ -z "$KOBJ" ] || [ -z "$DEST" ]; then
+      echo "Usage: $0 <ksrc directory> <kobj directory> <output.tar.gz>" >&2
+      exit 1
+    fi
+
+    KSRC=$(cd $KSRC; printf "all:\n\t@echo \${CURDIR}\n" | make -f -)
+    KOBJ=$(cd $KOBJ; printf "all:\n\t@echo \${CURDIR}\n" | make -f -)
+
+    find $KSRC $KOBJ \( -name '*.gcno' -o -name '*.[ch]' -o -type l \) -a \
+                     -perm /u+r,g+r | tar cfz $DEST -P -T -
+
+    if [ $? -eq 0 ] ; then
+      echo "$DEST successfully created, copy to test system and unpack with:"
+      echo "  tar xfz $DEST -P"
+    else
+      echo "Could not create file $DEST"
+    fi
+
+
+附录B：collect_on_test.sh
+-------------------------
+
+用于在测试机上收集覆盖率数据文件的示例脚本
+（见 :ref:`编译机和测试机分离 b. <gcov-build_zh>` ）
+
+.. code-block:: sh
+
+    #!/bin/bash -e
+
+    DEST=$1
+    GCDA=/sys/kernel/debug/gcov
+
+    if [ -z "$DEST" ] ; then
+      echo "Usage: $0 <output.tar.gz>" >&2
+      exit 1
+    fi
+
+    TEMPDIR=$(mktemp -d)
+    echo Collecting data..
+    find $GCDA -type d -exec mkdir -p $TEMPDIR/\{\} \;
+    find $GCDA -name '*.gcda' -exec sh -c 'cat < $0 > '$TEMPDIR'/$0' {} \;
+    find $GCDA -name '*.gcno' -exec sh -c 'cp -d $0 '$TEMPDIR'/$0' {} \;
+    tar czf $DEST -C $TEMPDIR sys
+    rm -rf $TEMPDIR
+
+    echo "$DEST successfully created, copy to build system and unpack with:"
+    echo "  tar xfz $DEST"