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Jakub Kicinski a73f214e89 Merge branch 'add-option-to-provide-opt_id-value-via-cmsg' 
Vadim Fedorenko says:

====================
Add option to provide OPT_ID value via cmsg

SOF_TIMESTAMPING_OPT_ID socket option flag gives a way to correlate TX
timestamps and packets sent via socket. Unfortunately, there is no way
to reliably predict socket timestamp ID value in case of error returned
by sendmsg. For UDP sockets it's impossible because of lockless
nature of UDP transmit, several threads may send packets in parallel. In
case of RAW sockets MSG_MORE option makes things complicated. More
details are in the conversation [1].
This patch adds new control message type to give user-space
software an opportunity to control the mapping between packets and
values by providing ID with each sendmsg.

The first patch in the series adds all needed definitions and implements
the function for UDP sockets. The explicit check of socket's type is not
added because subsequent patches in the series will add support for other
types of sockets. The documentation is also included into the first
patch.

Patch 2/4 adds support for TCP sockets. This part is simple and straight
forward.

Patch 3/4 adds support for RAW sockets. It's a bit tricky because
sock_tx_timestamp functions has to be refactored to receive full socket
cookie information to fill in ID. The commit b534dc46c8 ("net_tstamp:
add SOF_TIMESTAMPING_OPT_ID_TCP") did the conversion of sk_tsflags to
u32 but sock_tx_timestamp functions were not converted and still receive
16b flags. It wasn't a problem because SOF_TIMESTAMPING_OPT_ID_TCP was
not checked in these functions, that's why no backporting is needed.

Patch 4/4 adds selftests for new feature.

[1] https://lore.kernel.org/netdev/CALCETrU0jB+kg0mhV6A8mrHfTE1D1pr1SD_B9Eaa9aDPfgHdtA@mail.gmail.com/
====================

Link: https://patch.msgid.link/20241001125716.2832769-1-vadfed@meta.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-10-04 11:52:23 -07:00
arch net_tstamp: add SCM_TS_OPT_ID to provide OPT_ID in control message 2024-10-04 11:52:19 -07:00
block move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
Documentation net_tstamp: add SCM_TS_OPT_ID to provide OPT_ID in control message 2024-10-04 11:52:19 -07:00
drivers net/mlx5: hw counters: Remove mlx5_fc_create_ex 2024-10-04 11:33:47 -07:00
fs three small ksmbd server fixes 2024-10-03 09:38:16 -07:00
include net_tstamp: add SCM_TS_OPT_ID for RAW sockets 2024-10-04 11:52:19 -07:00
init Rust changes for v6.12 2024-09-25 10:25:40 -07:00
io_uring for-6.12/io_uring-20240922 2024-09-24 11:11:38 -07:00
ipc struct fd layout change (and conversion to accessor helpers) 2024-09-23 09:35:36 -07:00
kernel Getting rid of asm/unaligned.h includes 2024-10-02 16:42:28 -07:00
lib lib: packing: use GENMASK() for box_mask 2024-10-03 15:32:04 -07:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm 19 hotfixes. 13 are cc:stable. 2024-09-27 10:27:22 -07:00
net net_tstamp: add SCM_TS_OPT_ID for RAW sockets 2024-10-04 11:52:19 -07:00
rust rust: net::phy always define device_table in module_phy_driver macro 2024-10-03 16:42:18 -07:00
samples [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
scripts Reduce Coccinelle choices in string_choices.cocci 2024-09-28 21:33:11 +02:00
security move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
sound move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
tools selftests: txtimestamp: add SCM_TS_OPT_ID test 2024-10-04 11:52:20 -07:00
usr initramfs: shorten cmd_initfs in usr/Makefile 2024-07-16 01:07:52 +09:00
virt x86: 2024-09-28 09:20:14 -07:00
.clang-format clang-format: Update with v6.11-rc1's for_each macro list 2024-08-02 13:20:31 +02:00
.cocciconfig
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore Add Jeff Kirsher to .get_maintainer.ignore 2024-03-08 11:36:54 +00:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore Kbuild updates for v6.12 2024-09-24 13:02:06 -07:00
.mailmap Summary 2024-09-24 11:08:40 -07:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Mark powerpc spufs as orphaned 2024-08-19 21:27:56 +10:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS lib: packing: add KUnit tests adapted from selftests 2024-10-03 15:32:04 -07:00
Makefile Linux 6.12-rc1 2024-09-29 15:06:19 -07:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.