netdev - [PATCH v4 bpf-next 0/3] Auto-generate list of BPF helpers

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Message-ID: <20191007030738.2627420-1-andriin@fb.com>
Date:   Sun, 6 Oct 2019 20:07:35 -0700
From:   Andrii Nakryiko <andriin@...com>
To:     <bpf@...r.kernel.org>, <netdev@...r.kernel.org>, <ast@...com>,
        <daniel@...earbox.net>, <quentin.monnet@...ronome.com>
CC:     <andrii.nakryiko@...il.com>, <kernel-team@...com>,
        Andrii Nakryiko <andriin@...com>
Subject: [PATCH v4 bpf-next 0/3] Auto-generate list of BPF helpers

This patch set adds ability to auto-generate list of BPF helper definitions.
It relies on existing scripts/bpf_helpers_doc.py and include/uapi/linux/bpf.h
having a well-defined set of comments. bpf_helper_defs.h contains all BPF
helper signatures which stay in sync with latest bpf.h UAPI. This
auto-generated header is included from bpf_helpers.h, while all previously
hand-written BPF helper definitions are simultaneously removed in patch #3.
The end result is less manually maintained and redundant boilerplate code,
while also more consistent and well-documented set of BPF helpers. Generated
helper definitions are completely independent from a specific bpf.h on
a target system, because it doesn't use BPF_FUNC_xxx enums.

v3->v4:
- instead of libbpf's Makefile, integrate with selftest/bpf's Makefile (Alexei);

v2->v3:
- delete bpf_helper_defs.h properly (Alexei);

v1->v2:
- add bpf_helper_defs.h to .gitignore and `make clean` (Alexei).

Andrii Nakryiko (3):
  uapi/bpf: fix helper docs
  scripts/bpf: teach bpf_helpers_doc.py to dump BPF helper definitions
  libbpf: auto-generate list of BPF helper definitions

 include/uapi/linux/bpf.h                  |  32 +--
 scripts/bpf_helpers_doc.py                | 155 ++++++++++++-
 tools/include/uapi/linux/bpf.h            |  32 +--
 tools/testing/selftests/bpf/.gitignore    |   1 +
 tools/testing/selftests/bpf/Makefile      |   8 +-
 tools/testing/selftests/bpf/bpf_helpers.h | 264 +---------------------
 6 files changed, 195 insertions(+), 297 deletions(-)

-- 
2.17.1