selftests/bpf: Add test for static subprog call in lock cs

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Add selftests for static subprog calls within bpf_spin_lock critical
section, and ensure we still reject global subprog calls. Also test the
case where a subprog call will unlock the caller's held lock, or the
caller will unlock a lock taken by a subprog call, ensuring correct
transfer of lock state across frames on exit.

Acked-by: Yonghong Song <yonghong.song@linux.dev>
Acked-by: David Vernet <void@manifault.com>
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20240204222349.938118-3-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Kumar Kartikeya Dwivedi 2024-02-04 22:23:49 +00:00 • committed by Alexei Starovoitov

parent a44b1334aa

commit e8699c4ff8

3 changed files with 111 additions and 0 deletions

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

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65

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

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

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