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Alexei Starovoitov 403f3e8fda Merge branch 'add-bpf_xdp_get_xfrm_state-kfunc' Daniel Xu says: ==================== Add bpf_xdp_get_xfrm_state() kfunc This patchset adds two kfunc helpers, bpf_xdp_get_xfrm_state() and bpf_xdp_xfrm_state_release() that wrap xfrm_state_lookup() and xfrm_state_put(). The intent is to support software RSS (via XDP) for the ongoing/upcoming ipsec pcpu work [0]. Recent experiments performed on (hopefully) reproducible AWS testbeds indicate that single tunnel pcpu ipsec can reach line rate on 100G ENA nics. Note this patchset only tests/shows generic xfrm_state access. The "secret sauce" (if you can really even call it that) involves accessing a soon-to-be-upstreamed pcpu_num field in xfrm_state. Early example is available here [1]. [0]: https://datatracker.ietf.org/doc/draft-ietf-ipsecme-multi-sa-performance/03/ [1]: `e89a1c617a/xdp-bench/xdp_redirect_cpumap.bpf.c (L385-L406)` Changes from v5: * Improve kfunc doc comments * Remove extraneous replay-window setting on selftest reverse path * Squash two kfunc commits into one * Rebase to bpf-next to pick up bitfield write patches * Remove testing of opts.error in selftest prog Changes from v4: * Fixup commit message for selftest * Set opts->error -ENOENT for !x * Revert single file xfrm + bpf Changes from v3: * Place all xfrm bpf integrations in xfrm_bpf.c * Avoid using nval as a temporary * Rebase to bpf-next * Remove extraneous __failure_unpriv annotation for verifier tests Changes from v2: * Fix/simplify BPF_CORE_WRITE_BITFIELD() algorithm * Added verifier tests for bitfield writes * Fix state leakage across test_tunnel subtests Changes from v1: * Move xfrm tunnel tests to test_progs * Fix writing to opts->error when opts is invalid * Use __bpf_kfunc_start_defs() * Remove unused vxlanhdr definition * Add and use BPF_CORE_WRITE_BITFIELD() macro * Make series bisect clean Changes from RFCv2: * Rebased to ipsec-next * Fix netns leak Changes from RFCv1: * Add Antony's commit tags * Add KF_ACQUIRE and KF_RELEASE semantics ==================== Reviewed-by: Eyal Birger <eyal.birger@gmail.com> Link: https://lore.kernel.org/r/cover.1702593901.git.dxu@dxuuu.xyz Signed-off-by: Alexei Starovoitov <ast@kernel.org>		2023-12-14 17:12:56 -08:00
arch	x86, bpf: Use bpf_prog_pack for bpf trampoline	2023-12-06 17:17:21 -08:00
block	vfs-6.7-rc3.fixes	2023-11-24 09:45:40 -08:00
certs	This update includes the following changes:	2023-11-02 16:15:30 -10:00
crypto	This push fixes a regression in ahash and hides the Kconfig sub-options for the jitter RNG.	2023-11-09 17:04:58 -08:00
Documentation	xdp: Add VLAN tag hint	2023-12-13 16:16:40 -08:00
drivers	mlx5: implement VLAN tag XDP hint	2023-12-13 16:16:41 -08:00
fs	bpf, fsverity: Add kfunc bpf_get_fsverity_digest	2023-12-01 16:21:03 -08:00
include	bpf: xfrm: Add bpf_xdp_get_xfrm_state() kfunc	2023-12-14 17:12:49 -08:00
init	As usual, lots of singleton and doubleton patches all over the tree and	2023-11-02 20:53:31 -10:00
io_uring	io_uring: fix off-by one bvec index	2023-11-20 15:21:38 -07:00
ipc	Many singleton patches against the MM code. The patch series which are	2023-11-02 19:38:47 -10:00
kernel	bpf: Fix a race condition between btf_put() and map_free()	2023-12-14 17:10:32 -08:00
lib	test_bpf: Rename second ALU64_SMOD_X to ALU64_SMOD_K	2023-12-09 21:27:54 -08:00
LICENSES	LICENSES: Add the copyleft-next-0.3.1 license	2022-11-08 15:44:01 +01:00
mm	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2023-11-30 16:11:19 -08:00
net	bpf: xfrm: Add bpf_xdp_get_xfrm_state() kfunc	2023-12-14 17:12:49 -08:00
rust	Kbuild updates for v6.7	2023-11-04 08:07:19 -10:00
samples	Landlock updates for v6.7-rc1	2023-11-03 09:28:53 -10:00
scripts	scripts/checkstack.pl: match all stack sizes for s390	2023-11-22 15:06:23 +01:00
security	bpf,selinux: allocate bpf_security_struct per BPF token	2023-12-06 10:03:00 -08:00
sound	sound fixes for 6.7-rc2	2023-11-17 09:05:31 -05:00
tools	bpf: xfrm: Add selftest for bpf_xdp_get_xfrm_state()	2023-12-14 17:12:49 -08:00
usr	arch: Remove Itanium (IA-64) architecture	2023-09-11 08:13:17 +00:00
virt	ARM:	2023-09-07 13:52:20 -07:00
.clang-format	iommu: Add for_each_group_device()	2023-05-23 08:15:51 +02:00
.cocciconfig
.get_maintainer.ignore	get_maintainer: add Alan to .get_maintainer.ignore	2022-08-20 15:17:44 -07:00
.gitattributes	.gitattributes: set diff driver for Rust source code files	2023-05-31 17:48:25 +02:00
.gitignore	kbuild: rpm-pkg: generate kernel.spec in rpmbuild/SPECS/	2023-10-03 20:49:09 +09:00
.mailmap	As usual, lots of singleton and doubleton patches all over the tree and	2023-11-02 20:53:31 -10:00
.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	USB: Remove Wireless USB and UWB documentation	2023-08-09 14:17:32 +02:00
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	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2023-11-30 16:11:19 -08:00
Makefile	Linux 6.7-rc3	2023-11-26 19:59:33 -08:00
README	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -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 Restructured Text 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.