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, 135 insertions, 0 deletions

diff --git a/Documentation/translations/zh_CN/mm/memory-model.rst b/Documentation/translations/zh_CN/mm/memory-model.rst
new file mode 100644
index 000000000..77ec149a9
--- /dev/null
+++ b/Documentation/translations/zh_CN/mm/memory-model.rst
@@ -0,0 +1,135 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+:Original: Documentation/mm/memory-model.rst
+
+:翻译:
+
+ 司延腾 Yanteng Si <siyanteng@loongson.cn>
+
+:校译:
+
+
+============
+物理内存模型
+============
+
+系统中的物理内存可以用不同的方式进行寻址。最简单的情况是，物理内存从地址0开
+始，跨越一个连续的范围，直到最大的地址。然而，这个范围可能包含CPU无法访问的
+小孔隙。那么，在完全不同的地址可能有几个连续的范围。而且，别忘了NUMA，即不
+同的内存库连接到不同的CPU。
+
+Linux使用两种内存模型中的一种对这种多样性进行抽象。FLATMEM和SPARSEM。每
+个架构都定义了它所支持的内存模型，默认的内存模型是什么，以及是否有可能手动
+覆盖该默认值。
+
+所有的内存模型都使用排列在一个或多个数组中的 `struct page` 来跟踪物理页
+帧的状态。
+
+无论选择哪种内存模型，物理页框号（PFN）和相应的 `struct page` 之间都存
+在一对一的映射关系。
+
+每个内存模型都定义了 :c:func:`pfn_to_page` 和 :c:func:`page_to_pfn`
+帮助函数，允许从PFN到 `struct page` 的转换，反之亦然。
+
+FLATMEM
+=======
+
+最简单的内存模型是FLATMEM。这个模型适用于非NUMA系统的连续或大部分连续的
+物理内存。
+
+在FLATMEM内存模型中，有一个全局的 `mem_map` 数组来映射整个物理内存。对
+于大多数架构，孔隙在 `mem_map` 数组中都有条目。与孔洞相对应的 `struct page`
+对象从未被完全初始化。
+
+为了分配 `mem_map` 数组，架构特定的设置代码应该调用free_area_init()函数。
+然而，在调用memblock_free_all()函数之前，映射数组是不能使用的，该函数
+将所有的内存交给页分配器。
+
+一个架构可能会释放 `mem_map` 数组中不包括实际物理页的部分。在这种情况下，特
+定架构的 :c:func:`pfn_valid` 实现应该考虑到 `mem_map` 中的孔隙。
+
+使用FLATMEM，PFN和 `struct page` 之间的转换是直接的。 `PFN - ARCH_PFN_OFFSET`
+是 `mem_map` 数组的一个索引。
+
+`ARCH_PFN_OFFSET` 定义了物理内存起始地址不同于0的系统的第一个页框号。
+
+SPARSEMEM
+=========
+
+SPARSEMEM是Linux中最通用的内存模型，它是唯一支持若干高级功能的内存模型，
+如物理内存的热插拔、非易失性内存设备的替代内存图和较大系统的内存图的延迟
+初始化。
+
+SPARSEMEM模型将物理内存显示为一个部分的集合。一个区段用mem_section结构
+体表示，它包含 `section_mem_map` ，从逻辑上讲，它是一个指向 `struct page`
+阵列的指针。然而，它被存储在一些其他的magic中，以帮助分区管理。区段的大小
+和最大区段数是使用 `SECTION_SIZE_BITS` 和 `MAX_PHYSMEM_BITS` 常量
+来指定的，这两个常量是由每个支持SPARSEMEM的架构定义的。 `MAX_PHYSMEM_BITS`
+是一个架构所支持的物理地址的实际宽度，而 `SECTION_SIZE_BITS` 是一个任
+意的值。
+
+最大的段数表示为 `NR_MEM_SECTIONS` ，定义为
+
+.. math::
+
+   NR\_MEM\_SECTIONS = 2 ^ {(MAX\_PHYSMEM\_BITS - SECTION\_SIZE\_BITS)}
+
+`mem_section` 对象被安排在一个叫做 `mem_sections` 的二维数组中。这个数组的
+大小和位置取决于 `CONFIG_SPARSEM_EXTREME` 和可能的最大段数:
+
+* 当 `CONFIG_SPARSEMEM_EXTREME` 被禁用时， `mem_sections` 数组是静态的，有
+  `NR_MEM_SECTIONS` 行。每一行持有一个 `mem_section` 对象。
+* 当 `CONFIG_SPARSEMEM_EXTREME` 被启用时， `mem_sections` 数组被动态分配。
+  每一行包含价值 `PAGE_SIZE` 的 `mem_section` 对象，行数的计算是为了适应所有的
+  内存区。
+
+架构设置代码应该调用sparse_init()来初始化内存区和内存映射。
+
+通过SPARSEMEM，有两种可能的方式将PFN转换为相应的 `struct page` --"classic sparse"和
+ "sparse vmemmap"。选择是在构建时进行的，它由 `CONFIG_SPARSEMEM_VMEMMAP` 的
+ 值决定。
+
+Classic sparse在page->flags中编码了一个页面的段号，并使用PFN的高位来访问映射该页
+框的段。在一个区段内，PFN是指向页数组的索引。
+
+Sparse vmemmapvmemmap使用虚拟映射的内存映射来优化pfn_to_page和page_to_pfn操
+作。有一个全局的 `struct page *vmemmap` 指针，指向一个虚拟连续的 `struct page`
+对象阵列。PFN是该数组的一个索引，`struct page` 从 `vmemmap` 的偏移量是该页的PFN。
+
+为了使用vmemmap，一个架构必须保留一个虚拟地址的范围，以映射包含内存映射的物理页，并
+确保 `vmemmap`指向该范围。此外，架构应该实现 :c:func:`vmemmap_populate` 方法，
+它将分配物理内存并为虚拟内存映射创建页表。如果一个架构对vmemmap映射没有任何特殊要求，
+它可以使用通用内存管理提供的默认 :c:func:`vmemmap_populate_basepages`。
+
+虚拟映射的内存映射允许将持久性内存设备的 `struct page` 对象存储在这些设备上预先分
+配的存储中。这种存储用vmem_altmap结构表示，最终通过一长串的函数调用传递给
+vmemmap_populate()。vmemmap_populate()实现可以使用 `vmem_altmap` 和
+:c:func:`vmemmap_alloc_block_buf` 助手来分配持久性内存设备上的内存映射。
+
+ZONE_DEVICE
+===========
+`ZONE_DEVICE` 设施建立在 `SPARSEM_VMEMMAP` 之上，为设备驱动识别的物理地址范
+围提供 `struct page` `mem_map` 服务。 `ZONE_DEVICE` 的 "设备" 方面与以下
+事实有关：这些地址范围的页面对象从未被在线标记过，而且必须对设备进行引用，而不仅仅
+是页面，以保持内存被“锁定”以便使用。 `ZONE_DEVICE` ，通过 :c:func:`devm_memremap_pages` ，
+为给定的pfns范围执行足够的内存热插拔来开启 :c:func:`pfn_to_page`，
+:c:func:`page_to_pfn`, ，和 :c:func:`get_user_pages` 服务。由于页面引
+用计数永远不会低于1，所以页面永远不会被追踪为空闲内存，页面的 `struct list_head lru`
+空间被重新利用，用于向映射该内存的主机设备/驱动程序进行反向引用。
+
+虽然 `SPARSEMEM` 将内存作为一个区段的集合，可以选择收集并合成内存块，但
+`ZONE_DEVICE` 用户需要更小的颗粒度来填充 `mem_map` 。鉴于 `ZONE_DEVICE`
+内存从未被在线标记，因此它的内存范围从未通过sysfs内存热插拔api暴露在内存块边界
+上。这个实现依赖于这种缺乏用户接口的约束，允许子段大小的内存范围被指定给
+:c:func:`arch_add_memory` ，即内存热插拔的上半部分。子段支持允许2MB作为
+:c:func:`devm_memremap_pages` 的跨架构通用对齐颗粒度。
+
+`ZONE_DEVICE` 的用户是:
+
+* pmem: 通过DAX映射将平台持久性内存作为直接I/O目标使用。
+
+* hmm: 用 `->page_fault()` 和 `->page_free()` 事件回调扩展 `ZONE_DEVICE` ，
+  以允许设备驱动程序协调与设备内存相关的内存管理事件，通常是GPU内存。参见Documentation/mm/hmm.rst。
+
+* p2pdma: 创建 `struct page` 对象，允许PCI/E拓扑结构中的peer设备协调它们之间的
+  直接DMA操作，即绕过主机内存。