talos-op-linux/tools/testing/selftests/bpf, branch master

selftests/bpf: Test freeing sockmap/sockhash with a socket in it

2020-02-07T21:36:26+00:00

Commit 7e81a3530206 ("bpf: Sockmap, ensure sock lock held during tear down") introduced sleeping issues inside RCU critical sections and while holding a spinlock on sockmap/sockhash tear-down. There has to be at least one socket in the map for the problem to surface. This adds a test that triggers the warnings for broken locking rules. Not a fix per se, but rather tooling to verify the accompanying fixes. Run on a VM with 1 vCPU to reproduce the warnings. Fixes: 7e81a3530206 ("bpf: Sockmap, ensure sock lock held during tear down") Signed-off-by: Jakub Sitnicki Signed-off-by: Daniel Borkmann Acked-by: John Fastabend Link: https://lore.kernel.org/bpf/20200206111652.694507-4-jakub@cloudflare.com

selftests/bpf: Fix trampoline_count.c selftest compilation warning

2020-02-03T23:08:49+00:00

Fix missing braces compilation warning in trampoline_count test: .../prog_tests/trampoline_count.c: In function ‘test_trampoline_count’: .../prog_tests/trampoline_count.c:49:9: warning: missing braces around initializer [-Wmissing-braces] struct inst inst[MAX_TRAMP_PROGS] = { 0 }; ^ .../prog_tests/trampoline_count.c:49:9: warning: (near initialization for ‘inst[0]’) [-Wmissing-braces] Fixes: d633d57902a5 ("selftest/bpf: Add test for allowed trampolines count") Signed-off-by: Andrii Nakryiko Signed-off-by: Daniel Borkmann Acked-by: Yonghong Song Link: https://lore.kernel.org/bpf/20200202065152.2718142-1-andriin@fb.com

selftests/bpf: Add test based on port range for BPF flow dissector

2020-01-27T10:25:07+00:00

Add a simple test to make sure that a filter based on specified port range classifies packets correctly. Signed-off-by: Yoshiki Komachi Signed-off-by: Daniel Borkmann Acked-by: Petar Penkov Acked-by: John Fastabend Link: https://lore.kernel.org/bpf/20200117070533.402240-3-komachi.yoshiki@gmail.com

selftest/bpf: Add test for allowed trampolines count

2020-01-25T15:12:40+00:00

There's limit of 40 programs tht can be attached to trampoline for one function. Adding test that tries to attach that many plus one extra that needs to fail. Signed-off-by: Jiri Olsa Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20200123161508.915203-4-jolsa@kernel.org

selftests: bpf: Reset global state between reuseport test runs

2020-01-24T21:12:13+00:00

Currently, there is a lot of false positives if a single reuseport test fails. This is because expected_results and the result map are not cleared. Zero both after individual test runs, which fixes the mentioned false positives. Fixes: 91134d849a0e ("bpf: Test BPF_PROG_TYPE_SK_REUSEPORT") Signed-off-by: Lorenz Bauer Signed-off-by: Daniel Borkmann Reviewed-by: Jakub Sitnicki Acked-by: Martin KaFai Lau Acked-by: John Fastabend Link: https://lore.kernel.org/bpf/20200124112754.19664-5-lmb@cloudflare.com

selftests: bpf: Make reuseport test output more legible

2020-01-24T21:12:13+00:00

Include the name of the mismatching result in human readable format when reporting an error. The new output looks like the following: unexpected result result: [1, 0, 0, 0, 0, 0] expected: [0, 0, 0, 0, 0, 0] mismatch on DROP_ERR_INNER_MAP (bpf_prog_linum:153) check_results:FAIL:382 Signed-off-by: Lorenz Bauer Signed-off-by: Daniel Borkmann Reviewed-by: Jakub Sitnicki Acked-by: Martin KaFai Lau Acked-by: John Fastabend Link: https://lore.kernel.org/bpf/20200124112754.19664-4-lmb@cloudflare.com

selftests: bpf: Ignore FIN packets for reuseport tests

2020-01-24T21:12:13+00:00

The reuseport tests currently suffer from a race condition: FIN packets count towards DROP_ERR_SKB_DATA, since they don't contain a valid struct cmd. Tests will spuriously fail depending on whether check_results is called before or after the FIN is processed. Exit the BPF program early if FIN is set. Fixes: 91134d849a0e ("bpf: Test BPF_PROG_TYPE_SK_REUSEPORT") Signed-off-by: Lorenz Bauer Signed-off-by: Daniel Borkmann Reviewed-by: Jakub Sitnicki Acked-by: Martin KaFai Lau Acked-by: John Fastabend Link: https://lore.kernel.org/bpf/20200124112754.19664-3-lmb@cloudflare.com

selftests: bpf: Use a temporary file in test_sockmap

2020-01-24T21:12:13+00:00

Use a proper temporary file for sendpage tests. This means that running the tests doesn't clutter the working directory, and allows running the test on read-only filesystems. Fixes: 16962b2404ac ("bpf: sockmap, add selftests") Signed-off-by: Lorenz Bauer Signed-off-by: Daniel Borkmann Reviewed-by: Jakub Sitnicki Acked-by: Martin KaFai Lau Acked-by: John Fastabend Link: https://lore.kernel.org/bpf/20200124112754.19664-2-lmb@cloudflare.com

selftests/bpf: Improve bpftool changes detection

2020-01-24T10:09:21+00:00

Detect when bpftool source code changes and trigger rebuild within selftests/bpf Makefile. Also fix few small formatting problems. Signed-off-by: Andrii Nakryiko Signed-off-by: Daniel Borkmann Acked-by: Martin KaFai Lau Acked-by: Toke Høiland-Jørgensen Link: https://lore.kernel.org/bpf/20200124054148.2455060-1-andriin@fb.com

selftests/bpf: Initialize duration variable before using

2020-01-24T10:05:45+00:00

The 'duration' variable is referenced in the CHECK() macro, and there are some uses of the macro before 'duration' is set. The clang compiler (validly) complains about this. Sample error: .../selftests/bpf/prog_tests/fexit_test.c:23:6: warning: variable 'duration' is uninitialized when used here [-Wuninitialized] if (CHECK(err, "prog_load sched cls", "err %d errno %d\n", err, errno)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .../selftests/bpf/test_progs.h:134:25: note: expanded from macro 'CHECK' if (CHECK(err, "prog_load sched cls", "err %d errno %d\n", err, errno)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ _CHECK(condition, tag, duration, format) ^~~~~~~~ Signed-off-by: John Sperbeck Signed-off-by: Stanislav Fomichev Signed-off-by: Daniel Borkmann Acked-by: Martin KaFai Lau Link: https://lore.kernel.org/bpf/20200123235144.93610-1-sdf@google.com