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, 189 insertions, 0 deletions

diff --git a/Documentation/translations/zh_CN/devicetree/of_unittest.rst b/Documentation/translations/zh_CN/devicetree/of_unittest.rst
new file mode 100644
index 000000000..11eb08ca8
--- /dev/null
+++ b/Documentation/translations/zh_CN/devicetree/of_unittest.rst
@@ -0,0 +1,189 @@
+.. SPDX-License-Identifier: GPL-2.0
+.. include:: ../disclaimer-zh_CN.rst
+
+:Original: Documentation/devicetree/of_unittest.rst
+
+:翻译:
+
+ 司延腾 Yanteng Si <siyanteng@loongson.cn>
+
+:校译:
+
+=================================
+Open Firmware Devicetree 单元测试
+=================================
+
+作者: Gaurav Minocha <gaurav.minocha.os@gmail.com>
+
+1. 概述
+=======
+
+本文档解释了执行 OF 单元测试所需的测试数据是如何动态地附加到实时树上的，与机器的架构无关。
+
+建议在继续读下去之前，先阅读以下文件。
+
+(1) Documentation/devicetree/usage-model.rst
+(2) http://www.devicetree.org/Device_Tree_Usage
+
+OF Selftest被设计用来测试提供给设备驱动开发者的接口（include/linux/of.h），以从未扁平
+化的设备树数据结构中获取设备信息等。这个接口被大多数设备驱动在各种使用情况下使用。
+
+
+2. 测试数据
+===========
+
+设备树源文件（drivers/of/unittest-data/testcases.dts）包含执行drivers/of/unittest.c
+中自动化单元测试所需的测试数据。目前，以下设备树源包含文件（.dtsi）被包含在testcases.dt中::
+
+    drivers/of/unittest-data/tests-interrupts.dtsi
+    drivers/of/unittest-data/tests-platform.dtsi
+    drivers/of/unittest-data/tests-phandle.dtsi
+    drivers/of/unittest-data/tests-match.dtsi
+
+当内核在启用OF_SELFTEST的情况下被构建时，那么下面的make规则::
+
+    $(obj)/%.dtb: $(src)/%.dts FORCE
+	    $(call if_changed_dep, dtc)
+
+用于将DT源文件（testcases.dts）编译成二进制blob（testcases.dtb），也被称为扁平化的DT。
+
+之后，使用以下规则将上述二进制blob包装成一个汇编文件（testcases.dtb.S）::
+
+    $(obj)/%.dtb.S: $(obj)/%.dtb
+	    $(call cmd, dt_S_dtb)
+
+汇编文件被编译成一个对象文件（testcases.dtb.o），并被链接到内核镜像中。
+
+
+2.1. 添加测试数据
+-----------------
+
+未扁平化的设备树结构体:
+
+未扁平化的设备树由连接的设备节点组成，其树状结构形式如下所述::
+
+    // following struct members are used to construct the tree
+    struct device_node {
+	...
+	struct  device_node *parent;
+	struct  device_node *child;
+	struct  device_node *sibling;
+	...
+    };
+
+图1描述了一个机器的未扁平化设备树的通用结构，只考虑了子节点和同级指针。存在另一个指针，
+``*parent`` ，用于反向遍历该树。因此，在一个特定的层次上，子节点和所有的兄弟姐妹节点将
+有一个指向共同节点的父指针（例如，child1、sibling2、sibling3、sibling4的父指针指向
+根节点）::
+
+    root ('/')
+    |
+    child1 -> sibling2 -> sibling3 -> sibling4 -> null
+    |         |           |           |
+    |         |           |          null
+    |         |           |
+    |         |        child31 -> sibling32 -> null
+    |         |           |          |
+    |         |          null       null
+    |         |
+    |      child21 -> sibling22 -> sibling23 -> null
+    |         |          |            |
+    |        null       null         null
+    |
+    child11 -> sibling12 -> sibling13 -> sibling14 -> null
+    |           |           |            |
+    |           |           |           null
+    |           |           |
+    null        null       child131 -> null
+			    |
+			    null
+
+Figure 1: 未扁平化的设备树的通用结构
+
+
+在执行OF单元测试之前，需要将测试数据附加到机器的设备树上（如果存在）。因此，当调用
+selftest_data_add()时，首先会读取通过以下内核符号链接到内核镜像中的扁平化设备树
+数据::
+
+    __dtb_testcases_begin - address marking the start of test data blob
+    __dtb_testcases_end   - address marking the end of test data blob
+
+其次，它调用of_fdt_unflatten_tree()来解除扁平化的blob。最后，如果机器的设备树
+（即实时树）是存在的，那么它将未扁平化的测试数据树附加到实时树上，否则它将自己作为
+实时设备树附加。
+
+attach_node_and_children()使用of_attach_node()将节点附加到实时树上，如下所
+述。为了解释这一点，图2中描述的测试数据树被附加到图1中描述的实时树上::
+
+    root ('/')
+	|
+    testcase-data
+	|
+    test-child0 -> test-sibling1 -> test-sibling2 -> test-sibling3 -> null
+	|               |                |                |
+    test-child01      null             null             null
+
+
+Figure 2: 将测试数据树附在实时树上的例子。
+
+根据上面的方案，实时树已经存在，所以不需要附加根('/')节点。所有其他节点都是通过在
+每个节点上调用of_attach_node()来附加的。
+
+在函数of_attach_node()中，新的节点被附在实时树中给定的父节点的子节点上。但是，如
+果父节点已经有了一个孩子，那么新节点就会取代当前的孩子，并将其变成其兄弟姐妹。因此，
+当测试案例的数据节点被连接到上面的实时树（图1）时，最终的结构如图3所示::
+
+    root ('/')
+    |
+    testcase-data -> child1 -> sibling2 -> sibling3 -> sibling4 -> null
+    |               |          |           |           |
+    (...)             |          |           |          null
+		    |          |         child31 -> sibling32 -> null
+		    |          |           |           |
+		    |          |          null        null
+		    |          |
+		    |        child21 -> sibling22 -> sibling23 -> null
+		    |          |           |            |
+		    |         null        null         null
+		    |
+		    child11 -> sibling12 -> sibling13 -> sibling14 -> null
+		    |          |            |            |
+		    null       null          |           null
+					    |
+					    child131 -> null
+					    |
+					    null
+    -----------------------------------------------------------------------
+
+    root ('/')
+    |
+    testcase-data -> child1 -> sibling2 -> sibling3 -> sibling4 -> null
+    |               |          |           |           |
+    |             (...)      (...)       (...)        null
+    |
+    test-sibling3 -> test-sibling2 -> test-sibling1 -> test-child0 -> null
+    |                |                   |                |
+    null             null                null         test-child01
+
+
+Figure 3: 附加测试案例数据后的实时设备树结构。
+
+
+聪明的读者会注意到，与先前的结构相比，test-child0节点成为最后一个兄弟姐妹（图2）。
+在连接了第一个test-child0节点之后，又连接了test-sibling1节点，该节点推动子节点
+（即test-child0）成为兄弟姐妹，并使自己成为子节点，如上所述。
+
+如果发现一个重复的节点（即如果一个具有相同full_name属性的节点已经存在于实时树中），
+那么该节点不会被附加，而是通过调用函数update_node_properties()将其属性更新到活
+树的节点中。
+
+
+2.2. 删除测试数据
+-----------------
+
+一旦测试用例执行完，selftest_data_remove被调用，以移除最初连接的设备节点（首先是
+叶子节点被分离，然后向上移动父节点被移除，最后是整个树）。selftest_data_remove()
+调用detach_node_and_children()，使用of_detach_node()将节点从实时设备树上分离。
+
+为了分离一个节点，of_detach_node()要么将给定节点的父节点的子节点指针更新为其同级节
+点，要么根据情况将前一个同级节点附在给定节点的同级节点上。就这样吧。 :)