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, 175 insertions, 0 deletions

diff --git a/Documentation/process/kernel-docs.rst b/Documentation/process/kernel-docs.rst
new file mode 100644
index 000000000..1c6e2ab92
--- /dev/null
+++ b/Documentation/process/kernel-docs.rst
@@ -0,0 +1,175 @@
+.. _kernel_docs:
+
+Index of Further Kernel Documentation
+=====================================
+
+The need for a document like this one became apparent in the
+linux-kernel mailing list as the same questions, asking for pointers
+to information, appeared again and again.
+
+Fortunately, as more and more people get to GNU/Linux, more and more
+get interested in the Kernel. But reading the sources is not always
+enough. It is easy to understand the code, but miss the concepts, the
+philosophy and design decisions behind this code.
+
+Unfortunately, not many documents are available for beginners to
+start. And, even if they exist, there was no "well-known" place which
+kept track of them. These lines try to cover this lack.
+
+PLEASE, if you know any paper not listed here or write a new document,
+include a reference to it here, following the kernel's patch submission
+process. Any corrections, ideas or comments are also welcome.
+
+All documents are cataloged with the following fields: the document's
+"Title", the "Author"/s, the "URL" where they can be found, some
+"Keywords" helpful when searching for specific topics, and a brief
+"Description" of the Document.
+
+.. note::
+
+   The documents on each section of this document are ordered by its
+   published date, from the newest to the oldest. The maintainer(s) should
+   periodically retire resources as they become obsolte or outdated; with
+   the exception of foundational books.
+
+Docs at the Linux Kernel tree
+-----------------------------
+
+The Sphinx books should be built with ``make {htmldocs | pdfdocs | epubdocs}``.
+
+    * Name: **linux/Documentation**
+
+      :Author: Many.
+      :Location: Documentation/
+      :Keywords: text files, Sphinx.
+      :Description: Documentation that comes with the kernel sources,
+        inside the Documentation directory. Some pages from this document
+        (including this document itself) have been moved there, and might
+        be more up to date than the web version.
+
+On-line docs
+------------
+
+    * Title: **Linux Kernel Mailing List Glossary**
+
+      :Author: various
+      :URL: https://kernelnewbies.org/KernelGlossary
+      :Date: rolling version
+      :Keywords: glossary, terms, linux-kernel.
+      :Description: From the introduction: "This glossary is intended as
+        a brief description of some of the acronyms and terms you may hear
+        during discussion of the Linux kernel".
+
+    * Title: **The Linux Kernel Module Programming Guide**
+
+      :Author: Peter Jay Salzman, Michael Burian, Ori Pomerantz, Bob Mottram,
+        Jim Huang.
+      :URL: https://sysprog21.github.io/lkmpg/
+      :Date: 2021
+      :Keywords: modules, GPL book, /proc, ioctls, system calls,
+        interrupt handlers .
+      :Description: A very nice GPL book on the topic of modules
+        programming. Lots of examples. Currently the new version is being
+        actively maintained at https://github.com/sysprog21/lkmpg.
+
+Published books
+---------------
+
+    * Title: **Linux Kernel Programming: A Comprehensive Guide to Kernel Internals, Writing Kernel Modules, and Kernel Synchronization**
+
+          :Author: Kaiwan N. Billimoria
+          :Publisher: Packt Publishing Ltd
+          :Date: 2021
+          :Pages: 754
+          :ISBN: 978-1789953435
+
+    * Title: **Linux Kernel Development, 3rd Edition**
+
+      :Author: Robert Love
+      :Publisher: Addison-Wesley
+      :Date: July, 2010
+      :Pages: 440
+      :ISBN: 978-0672329463
+      :Notes: Foundational book
+
+.. _ldd3_published:
+
+    * Title: **Linux Device Drivers, 3rd Edition**
+
+      :Authors: Jonathan Corbet, Alessandro Rubini, and Greg Kroah-Hartman
+      :Publisher: O'Reilly & Associates
+      :Date: 2005
+      :Pages: 636
+      :ISBN: 0-596-00590-3
+      :Notes: Foundational book. Further information in
+        http://www.oreilly.com/catalog/linuxdrive3/
+        PDF format, URL: https://lwn.net/Kernel/LDD3/
+
+    * Title: **The Design of the UNIX Operating System**
+
+      :Author: Maurice J. Bach
+      :Publisher: Prentice Hall
+      :Date: 1986
+      :Pages: 471
+      :ISBN: 0-13-201757-1
+      :Notes: Foundational book
+
+Miscellaneous
+-------------
+
+    * Name: **Cross-Referencing Linux**
+
+      :URL: https://elixir.bootlin.com/
+      :Keywords: Browsing source code.
+      :Description: Another web-based Linux kernel source code browser.
+        Lots of cross references to variables and functions. You can see
+        where they are defined and where they are used.
+
+    * Name: **Linux Weekly News**
+
+      :URL: https://lwn.net
+      :Keywords: latest kernel news.
+      :Description: The title says it all. There's a fixed kernel section
+        summarizing developers' work, bug fixes, new features and versions
+        produced during the week.
+
+    * Name: **The home page of Linux-MM**
+
+      :Author: The Linux-MM team.
+      :URL: https://linux-mm.org/
+      :Keywords: memory management, Linux-MM, mm patches, TODO, docs,
+        mailing list.
+      :Description: Site devoted to Linux Memory Management development.
+        Memory related patches, HOWTOs, links, mm developers... Don't miss
+        it if you are interested in memory management development!
+
+    * Name: **Kernel Newbies IRC Channel and Website**
+
+      :URL: https://www.kernelnewbies.org
+      :Keywords: IRC, newbies, channel, asking doubts.
+      :Description: #kernelnewbies on irc.oftc.net.
+        #kernelnewbies is an IRC network dedicated to the 'newbie'
+        kernel hacker. The audience mostly consists of people who are
+        learning about the kernel, working on kernel projects or
+        professional kernel hackers that want to help less seasoned kernel
+        people.
+        #kernelnewbies is on the OFTC IRC Network.
+        Try irc.oftc.net as your server and then /join #kernelnewbies.
+        The kernelnewbies website also hosts articles, documents, FAQs...
+
+    * Name: **linux-kernel mailing list archives and search engines**
+
+      :URL: http://vger.kernel.org/vger-lists.html
+      :URL: http://www.uwsg.indiana.edu/hypermail/linux/kernel/index.html
+      :URL: http://groups.google.com/group/mlist.linux.kernel
+      :Keywords: linux-kernel, archives, search.
+      :Description: Some of the linux-kernel mailing list archivers. If
+        you have a better/another one, please let me know.
+
+-------
+
+This document was originally based on:
+
+ https://www.dit.upm.es/~jmseyas/linux/kernel/hackers-docs.html
+
+and written by Juan-Mariano de Goyeneche