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, 161 insertions, 0 deletions

diff --git a/Documentation/translations/zh_CN/core-api/padata.rst b/Documentation/translations/zh_CN/core-api/padata.rst
new file mode 100644
index 000000000..781d30675
--- /dev/null
+++ b/Documentation/translations/zh_CN/core-api/padata.rst
@@ -0,0 +1,161 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+.. include:: ../disclaimer-zh_CN.rst
+
+:Original: Documentation/core-api/padata.rst
+
+:翻译:
+
+ 司延腾 Yanteng Si <siyanteng@loongson.cn>
+
+.. _cn_core_api_padata.rst:
+
+==================
+padata并行执行机制
+==================
+
+:日期: 2020年5月
+
+Padata是一种机制，内核可以通过此机制将工作分散到多个CPU上并行完成，同时
+可以选择保持它们的顺序。
+
+它最初是为IPsec开发的，它需要在不对这些数据包重新排序的其前提下，为大量的数
+据包进行加密和解密。这是目前padata的序列化作业支持的唯一用途。
+
+Padata还支持多线程作业，将作业平均分割，同时在线程之间进行负载均衡和协调。
+
+执行序列化作业
+==============
+
+初始化
+------
+
+使用padata执行序列化作业的第一步是建立一个padata_instance结构体，以全面
+控制作业的运行方式::
+
+    #include <linux/padata.h>
+
+    struct padata_instance *padata_alloc(const char *name);
+
+'name'即标识了这个实例。
+
+然后，通过分配一个padata_shell来完成padata的初始化::
+
+   struct padata_shell *padata_alloc_shell(struct padata_instance *pinst);
+
+一个padata_shell用于向padata提交一个作业，并允许一系列这样的作业被独立地
+序列化。一个padata_instance可以有一个或多个padata_shell与之相关联，每个
+都允许一系列独立的作业。
+
+修改cpumasks
+------------
+
+用于运行作业的CPU可以通过两种方式改变，通过padata_set_cpumask()编程或通
+过sysfs。前者的定义是::
+
+    int padata_set_cpumask(struct padata_instance *pinst, int cpumask_type,
+			   cpumask_var_t cpumask);
+
+这里cpumask_type是PADATA_CPU_PARALLEL（并行）或PADATA_CPU_SERIAL（串行）之一，其中并
+行cpumask描述了哪些处理器将被用来并行执行提交给这个实例的作业，串行cpumask
+定义了哪些处理器被允许用作串行化回调处理器。 cpumask指定了要使用的新cpumask。
+
+一个实例的cpumasks可能有sysfs文件。例如，pcrypt的文件在
+/sys/kernel/pcrypt/<instance-name>。在一个实例的目录中，有两个文件，parallel_cpumask
+和serial_cpumask，任何一个cpumask都可以通过在文件中回显（echo）一个bitmask
+来改变，比如说::
+
+    echo f > /sys/kernel/pcrypt/pencrypt/parallel_cpumask
+
+读取其中一个文件会显示用户提供的cpumask，它可能与“可用”的cpumask不同。
+
+Padata内部维护着两对cpumask，用户提供的cpumask和“可用的”cpumask(每一对由一个
+并行和一个串行cpumask组成)。用户提供的cpumasks在实例分配时默认为所有可能的CPU，
+并且可以如上所述进行更改。可用的cpumasks总是用户提供的cpumasks的一个子集，只包
+含用户提供的掩码中的在线CPU；这些是padata实际使用的cpumasks。因此，向padata提
+供一个包含离线CPU的cpumask是合法的。一旦用户提供的cpumask中的一个离线CPU上线，
+padata就会使用它。
+
+改变CPU掩码的操作代价很高，所以不应频繁更改。
+
+运行一个作业
+-------------
+
+实际上向padata实例提交工作需要创建一个padata_priv结构体，它代表一个作业::
+
+    struct padata_priv {
+        /* Other stuff here... */
+	void                    (*parallel)(struct padata_priv *padata);
+	void                    (*serial)(struct padata_priv *padata);
+    };
+
+这个结构体几乎肯定会被嵌入到一些针对要做的工作的大结构体中。它的大部分字段对
+padata来说是私有的，但是这个结构在初始化时应该被清零，并且应该提供parallel()和
+serial()函数。在完成工作的过程中，这些函数将被调用，我们马上就会遇到。
+
+工作的提交是通过::
+
+    int padata_do_parallel(struct padata_shell *ps,
+		           struct padata_priv *padata, int *cb_cpu);
+
+ps和padata结构体必须如上所述进行设置；cb_cpu指向作业完成后用于最终回调的首选CPU；
+它必须在当前实例的CPU掩码中（如果不是，cb_cpu指针将被更新为指向实际选择的CPU）。
+padata_do_parallel()的返回值在成功时为0，表示工作正在进行中。-EBUSY意味着有人
+在其他地方正在搞乱实例的CPU掩码，而当cb_cpu不在串行cpumask中、并行或串行cpumasks
+中无在线CPU，或实例停止时，则会出现-EINVAL反馈。
+
+每个提交给padata_do_parallel()的作业将依次传递给一个CPU上的上述parallel()函数
+的一个调用，所以真正的并行是通过提交多个作业来实现的。parallel()在运行时禁用软
+件中断，因此不能睡眠。parallel()函数把获得的padata_priv结构体指针作为其唯一的参
+数；关于实际要做的工作的信息可能是通过使用container_of()找到封装结构体来获得的。
+
+请注意，parallel()没有返回值；padata子系统假定parallel()将从此时开始负责这项工
+作。作业不需要在这次调用中完成，但是，如果parallel()留下了未完成的工作，它应该准
+备在前一个作业完成之前，被以新的作业再次调用
+
+序列化作业
+----------
+
+当一个作业完成时，parallel()（或任何实际完成该工作的函数）应该通过调用通知padata此
+事::
+
+    void padata_do_serial(struct padata_priv *padata);
+
+在未来的某个时刻，padata_do_serial()将触发对padata_priv结构体中serial()函数的调
+用。这个调用将发生在最初要求调用padata_do_parallel()的CPU上；它也是在本地软件中断
+被禁用的情况下运行的。
+请注意，这个调用可能会被推迟一段时间，因为padata代码会努力确保作业按照提交的顺序完
+成。
+
+销毁
+----
+
+清理一个padata实例时，可以预见的是调用两个free函数，这两个函数对应于分配的逆过程::
+
+    void padata_free_shell(struct padata_shell *ps);
+    void padata_free(struct padata_instance *pinst);
+
+用户有责任确保在调用上述任何一项之前，所有未完成的工作都已完成。
+
+运行多线程作业
+==============
+
+一个多线程作业有一个主线程和零个或多个辅助线程，主线程参与作业，然后等待所有辅助线
+程完成。padata将作业分割成称为chunk的单元，其中chunk是一个线程在一次调用线程函数
+中完成的作业片段。
+
+用户必须做三件事来运行一个多线程作业。首先，通过定义一个padata_mt_job结构体来描述
+作业，这在接口部分有解释。这包括一个指向线程函数的指针，padata每次将作业块分配给线
+程时都会调用这个函数。然后，定义线程函数，它接受三个参数： ``start`` 、 ``end`` 和 ``arg`` ，
+其中前两个参数限定了线程操作的范围，最后一个是指向作业共享状态的指针，如果有的话。
+准备好共享状态，它通常被分配在主线程的堆栈中。最后，调用padata_do_multithreaded()，
+它将在作业完成后返回。
+
+接口
+====
+
+该API在以下内核代码中:
+
+include/linux/padata.h
+
+kernel/padata.c