selftests: bpf: Test sockmap update from BPF

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Add a test which copies a socket from a sockmap into another sockmap
or sockhash. This excercises bpf_map_update_elem support from BPF
context. Compare the socket cookies from source and destination to
ensure that the copy succeeded.

Also check that the verifier rejects map_update from unsafe contexts.

Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200821102948.21918-7-lmb@cloudflare.com

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Lorenz Bauer 2020-08-21 11:29:48 +01:00 • committed by Alexei Starovoitov

parent 0126240f44

commit bb23c0e1c5

3 changed files with 149 additions and 0 deletions

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78

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

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23

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

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48

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

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