Merge branch 'bpf-support-bpf_get_func_arg-for-bpf_trace_raw_tp'

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Menglong Dong says:

====================
bpf: support bpf_get_func_arg() for BPF_TRACE_RAW_TP

Support bpf_get_func_arg() for BPF_TRACE_RAW_TP by getting the function
argument count from "prog->aux->attach_func_proto" during verifier inline.

Changes v5 -> v4:
* some format adjustment in the 1st patch
* v4: https://lore.kernel.org/bpf/20260120073046.324342-1-dongml2@chinatelecom.cn/

Changes v4 -> v3:
* fix the error of using bpf_get_func_arg() for BPF_TRACE_ITER
* v3: https://lore.kernel.org/bpf/20260119023732.130642-1-dongml2@chinatelecom.cn/

Changes v3 -> v2:
* remove unnecessary NULL checking for prog->aux->attach_func_proto
* v2: https://lore.kernel.org/bpf/20260116071739.121182-1-dongml2@chinatelecom.cn/

Changes v2 -> v1:
* for nr_args, skip first 'void *__data' argument in btf_trace_##name
  typedef
* check the result4 and result5 in the selftests
* v1: https://lore.kernel.org/bpf/20260116035024.98214-1-dongml2@chinatelecom.cn/
====================

Link: https://patch.msgid.link/20260121044348.113201-1-dongml2@chinatelecom.cn
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

...

This commit is contained in:

Alexei Starovoitov 2026-01-21 09:31:35 -08:00

parent ba335bf3a5 1ed7977643

commit ca674a032f

6 changed files with 87 additions and 6 deletions

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22

kernel/bpf/verifier.c

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10

kernel/trace/bpf_trace.c

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3

tools/testing/selftests/bpf/prog_tests/get_func_args_test.c

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44

tools/testing/selftests/bpf/progs/get_func_args_test.c

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10

tools/testing/selftests/bpf/test_kmods/bpf_testmod-events.h

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4

tools/testing/selftests/bpf/test_kmods/bpf_testmod.c

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