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, 284 insertions, 0 deletions

diff --git a/Documentation/translations/zh_CN/arm/kernel_user_helpers.txt b/Documentation/translations/zh_CN/arm/kernel_user_helpers.txt
new file mode 100644
index 000000000..99af43639
--- /dev/null
+++ b/Documentation/translations/zh_CN/arm/kernel_user_helpers.txt
@@ -0,0 +1,284 @@
+Chinese translated version of Documentation/arm/kernel_user_helpers.rst
+
+If you have any comment or update to the content, please contact the
+original document maintainer directly.  However, if you have a problem
+communicating in English you can also ask the Chinese maintainer for
+help.  Contact the Chinese maintainer if this translation is outdated
+or if there is a problem with the translation.
+
+Maintainer: Nicolas Pitre <nicolas.pitre@linaro.org>
+		Dave Martin <dave.martin@linaro.org>
+Chinese maintainer: Fu Wei <tekkamanninja@gmail.com>
+---------------------------------------------------------------------
+Documentation/arm/kernel_user_helpers.rst 的中文翻译
+
+如果想评论或更新本文的内容，请直接联系原文档的维护者。如果你使用英文
+交流有困难的话，也可以向中文版维护者求助。如果本翻译更新不及时或者翻
+译存在问题，请联系中文版维护者。
+英文版维护者： Nicolas Pitre <nicolas.pitre@linaro.org>
+		Dave Martin <dave.martin@linaro.org>
+中文版维护者： 傅炜 Fu Wei <tekkamanninja@gmail.com>
+中文版翻译者： 傅炜 Fu Wei <tekkamanninja@gmail.com>
+中文版校译者： 宋冬生 Dongsheng Song <dongshneg.song@gmail.com>
+		傅炜 Fu Wei <tekkamanninja@gmail.com>
+
+
+以下为正文
+---------------------------------------------------------------------
+内核提供的用户空间辅助代码
+=========================
+
+在内核内存空间的固定地址处，有一个由内核提供并可从用户空间访问的代码
+段。它用于向用户空间提供因在许多 ARM CPU 中未实现的特性和/或指令而需
+内核提供帮助的某些操作。这些代码直接在用户模式下执行的想法是为了获得
+最佳效率，但那些与内核计数器联系过于紧密的部分，则被留给了用户库实现。
+事实上，此代码甚至可能因不同的 CPU 而异，这取决于其可用的指令集或它
+是否为 SMP 系统。换句话说，内核保留在不作出警告的情况下根据需要更改
+这些代码的权利。只有本文档描述的入口及其结果是保证稳定的。
+
+这与完全成熟的 VDSO 实现不同（但两者并不冲突），尽管如此，VDSO 可阻止
+某些通过常量高效跳转到那些代码段的汇编技巧。且由于那些代码段在返回用户
+代码前仅使用少量的代码周期，则一个 VDSO 间接远程调用将会在这些简单的
+操作上增加一个可测量的开销。
+
+在对那些拥有原生支持的新型处理器进行代码优化时，仅在已为其他操作使用
+了类似的新增指令，而导致二进制结果已与早期 ARM 处理器不兼容的情况下，
+用户空间才应绕过这些辅助代码，并在内联函数中实现这些操作（无论是通过
+编译器在代码中直接放置，还是作为库函数调用实现的一部分）。也就是说，
+如果你编译的代码不会为了其他目的使用新指令，则不要仅为了避免使用这些
+内核辅助代码，导致二进制程序无法在早期处理器上运行。
+
+新的辅助代码可能随着时间的推移而增加，所以新内核中的某些辅助代码在旧
+内核中可能不存在。因此，程序必须在对任何辅助代码调用假设是安全之前，
+检测 __kuser_helper_version 的值（见下文）。理想情况下，这种检测应该
+只在进程启动时执行一次；如果内核版本不支持所需辅助代码，则该进程可尽早
+中止执行。
+
+kuser_helper_version
+--------------------
+
+位置:	0xffff0ffc
+
+参考声明:
+
+  extern int32_t __kuser_helper_version;
+
+定义:
+
+  这个区域包含了当前运行内核实现的辅助代码版本号。用户空间可以通过读
+  取此版本号以确定特定的辅助代码是否存在。
+
+使用范例:
+
+#define __kuser_helper_version (*(int32_t *)0xffff0ffc)
+
+void check_kuser_version(void)
+{
+	if (__kuser_helper_version < 2) {
+		fprintf(stderr, "can't do atomic operations, kernel too old\n");
+		abort();
+	}
+}
+
+注意:
+
+  用户空间可以假设这个域的值不会在任何单个进程的生存期内改变。也就
+  是说，这个域可以仅在库的初始化阶段或进程启动阶段读取一次。
+
+kuser_get_tls
+-------------
+
+位置:	0xffff0fe0
+
+参考原型:
+
+  void * __kuser_get_tls(void);
+
+输入:
+
+  lr = 返回地址
+
+输出:
+
+  r0 = TLS 值
+
+被篡改的寄存器:
+
+  无
+
+定义:
+
+  获取之前通过 __ARM_NR_set_tls 系统调用设置的 TLS 值。
+
+使用范例:
+
+typedef void * (__kuser_get_tls_t)(void);
+#define __kuser_get_tls (*(__kuser_get_tls_t *)0xffff0fe0)
+
+void foo()
+{
+	void *tls = __kuser_get_tls();
+	printf("TLS = %p\n", tls);
+}
+
+注意:
+
+  - 仅在 __kuser_helper_version >= 1 时，此辅助代码存在
+    （从内核版本 2.6.12 开始）。
+
+kuser_cmpxchg
+-------------
+
+位置:	0xffff0fc0
+
+参考原型:
+
+  int __kuser_cmpxchg(int32_t oldval, int32_t newval, volatile int32_t *ptr);
+
+输入:
+
+  r0 = oldval
+  r1 = newval
+  r2 = ptr
+  lr = 返回地址
+
+输出:
+
+  r0 = 成功代码 (零或非零)
+  C flag = 如果 r0 == 0 则置 1，如果 r0 != 0 则清零。
+
+被篡改的寄存器:
+
+  r3, ip, flags
+
+定义:
+
+  仅在 *ptr 为 oldval 时原子保存 newval 于 *ptr 中。
+  如果 *ptr 被改变，则返回值为零，否则为非零值。
+  如果 *ptr 被改变，则 C flag 也会被置 1，以实现调用代码中的汇编
+  优化。
+
+使用范例:
+
+typedef int (__kuser_cmpxchg_t)(int oldval, int newval, volatile int *ptr);
+#define __kuser_cmpxchg (*(__kuser_cmpxchg_t *)0xffff0fc0)
+
+int atomic_add(volatile int *ptr, int val)
+{
+	int old, new;
+
+	do {
+		old = *ptr;
+		new = old + val;
+	} while(__kuser_cmpxchg(old, new, ptr));
+
+	return new;
+}
+
+注意:
+
+  - 这个例程已根据需要包含了内存屏障。
+
+  - 仅在 __kuser_helper_version >= 2 时，此辅助代码存在
+    （从内核版本 2.6.12 开始）。
+
+kuser_memory_barrier
+--------------------
+
+位置:	0xffff0fa0
+
+参考原型:
+
+  void __kuser_memory_barrier(void);
+
+输入:
+
+  lr = 返回地址
+
+输出:
+
+  无
+
+被篡改的寄存器:
+
+  无
+
+定义:
+
+  应用于任何需要内存屏障以防止手动数据修改带来的一致性问题，以及
+  __kuser_cmpxchg 中。
+
+使用范例:
+
+typedef void (__kuser_dmb_t)(void);
+#define __kuser_dmb (*(__kuser_dmb_t *)0xffff0fa0)
+
+注意:
+
+  - 仅在 __kuser_helper_version >= 3 时，此辅助代码存在
+    （从内核版本 2.6.15 开始）。
+
+kuser_cmpxchg64
+---------------
+
+位置:	0xffff0f60
+
+参考原型:
+
+  int __kuser_cmpxchg64(const int64_t *oldval,
+                        const int64_t *newval,
+                        volatile int64_t *ptr);
+
+输入:
+
+  r0 = 指向 oldval
+  r1 = 指向 newval
+  r2 = 指向目标值
+  lr = 返回地址
+
+输出:
+
+  r0 = 成功代码 (零或非零)
+  C flag = 如果 r0 == 0 则置 1，如果 r0 != 0 则清零。
+
+被篡改的寄存器:
+
+  r3, lr, flags
+
+定义:
+
+  仅在 *ptr 等于 *oldval 指向的 64 位值时，原子保存 *newval
+  指向的 64 位值于 *ptr 中。如果 *ptr 被改变，则返回值为零，
+  否则为非零值。
+
+  如果 *ptr 被改变，则 C flag 也会被置 1，以实现调用代码中的汇编
+  优化。
+
+使用范例:
+
+typedef int (__kuser_cmpxchg64_t)(const int64_t *oldval,
+                                  const int64_t *newval,
+                                  volatile int64_t *ptr);
+#define __kuser_cmpxchg64 (*(__kuser_cmpxchg64_t *)0xffff0f60)
+
+int64_t atomic_add64(volatile int64_t *ptr, int64_t val)
+{
+	int64_t old, new;
+
+	do {
+		old = *ptr;
+		new = old + val;
+	} while(__kuser_cmpxchg64(&old, &new, ptr));
+
+	return new;
+}
+
+注意:
+
+  - 这个例程已根据需要包含了内存屏障。
+
+  - 由于这个过程的代码长度（此辅助代码跨越 2 个常规的 kuser “槽”），
+    因此 0xffff0f80 不被作为有效的入口点。
+
+  - 仅在 __kuser_helper_version >= 5 时，此辅助代码存在
+    （从内核版本 3.1 开始）。