selftests/bpf: test for BPF_F_LOCK

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Add C based test that runs 4 bpf programs in parallel
that update the same hash and array maps.
And another 2 threads that read from these two maps
via lookup(key, value, BPF_F_LOCK) api
to make sure the user space sees consistent value in both
hash and array elements while user space races with kernel bpf progs.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

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Alexei Starovoitov 2019-01-31 15:40:12 -08:00 • committed by Daniel Borkmann

parent df5d22facd

commit ba72a7b4ba

3 changed files with 141 additions and 1 deletions

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2

tools/testing/selftests/bpf/Makefile

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66

tools/testing/selftests/bpf/test_map_lock.c

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74

tools/testing/selftests/bpf/test_progs.c

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