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Usama Arif 71a3cdf80c bpf/scripts: Raise an exception if the correct number of helpers are not generated
Currently bpf_helper_defs.h and the bpf helpers man page are auto-generated
using function documentation present in bpf.h. If the documentation for the
helper is missing or doesn't follow a specific format for e.g. if a function
is documented as:
 * long bpf_kallsyms_lookup_name( const char *name, int name_sz, int flags, u64 *res )
instead of
 * long bpf_kallsyms_lookup_name(const char *name, int name_sz, int flags, u64 *res)
(notice the extra space at the start and end of function arguments)
then that helper is not dumped in the auto-generated header and results in
an invalid call during eBPF runtime, even if all the code specific to the
helper is correct.

This patch checks the number of functions documented within the header file
with those present as part of #define __BPF_FUNC_MAPPER and raises an
Exception if they don't match. It is not needed with the currently documented
upstream functions, but can help in debugging when developing new helpers
when there might be missing or misformatted documentation.

Signed-off-by: Usama Arif <usama.arif@bytedance.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20220112114953.722380-1-usama.arif@bytedance.com
2022-01-14 16:47:34 -08:00
arch Power management updates for 5.17-rc1 2022-01-10 20:34:00 -08:00
block block-5.16-2021-12-19 2021-12-19 12:38:53 -08:00
certs certs: Add support for using elliptic curve keys for signing modules 2021-08-23 19:55:42 +03:00
crypto lib/crypto: blake2s: include as built-in 2022-01-07 00:25:25 +01:00
Documentation Device properties framework updates for 5.17-rc1 2022-01-10 20:48:19 -08:00
drivers Device properties framework updates for 5.17-rc1 2022-01-10 20:48:19 -08:00
fs Networking changes for 5.17. 2022-01-10 19:06:09 -08:00
include Device properties framework updates for 5.17-rc1 2022-01-10 20:48:19 -08:00
init Power management updates for 5.17-rc1 2022-01-10 20:34:00 -08:00
ipc shm: extend forced shm destroy to support objects from several IPC nses 2021-11-20 10:35:54 -08:00
kernel Power management updates for 5.17-rc1 2022-01-10 20:34:00 -08:00
lib Networking changes for 5.17. 2022-01-10 19:06:09 -08:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm slab changes for 5.17 2022-01-10 11:58:12 -08:00
net netfilter: nf_tables: don't use 'data_size' uninitialized 2022-01-10 19:33:36 -08:00
samples samples/bpf: Stop using bpf_map__def() API 2022-01-12 17:01:38 -08:00
scripts bpf/scripts: Raise an exception if the correct number of helpers are not generated 2022-01-14 16:47:34 -08:00
security Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2021-12-31 14:35:40 +00:00
sound sound fixes for 5.16-rc7 2021-12-23 09:55:58 -08:00
tools libbpf: Deprecate bpf_map__def() API 2022-01-12 17:01:39 -08:00
usr initramfs: Check timestamp to prevent broken cpio archive 2021-10-24 13:48:40 +09:00
virt KVM: downgrade two BUG_ONs to WARN_ON_ONCE 2021-11-26 06:43:28 -05:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: ignore only top-level modules.builtin 2021-05-02 00:43:35 +09:00
.mailmap media updates for v5.17-rc1 2022-01-10 18:55:43 -08:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Daniel Drake to credits 2021-09-21 08:34:58 +03:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Device properties framework updates for 5.17-rc1 2022-01-10 20:48:19 -08:00
Makefile Linux 5.16 2022-01-09 14:55:34 -08:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

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.