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
