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| author |   Josef Bacik <jbacik@fb.com> | 2017-12-11 11:36:49 -0500 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2017-12-12 09:02:40 -0800 |
| commit | 965de87e54b803223bff703ea6b2a76c056695ae (patch) | |
| tree | 43f90acde38704b6831d3819ce0bffee092eade4 /tools/testing/selftests/bpf | |
| parent | bpf: add a bpf_override_function helper (diff) | |
| download | wireguard-linux-965de87e54b803223bff703ea6b2a76c056695ae.tar.xz wireguard-linux-965de87e54b803223bff703ea6b2a76c056695ae.zip | |
samples/bpf: add a test for bpf_override_return
This adds a basic test for bpf_override_return to verify it works. We
override the main function for mounting a btrfs fs so it'll return
-ENOMEM and then make sure that trying to mount a btrfs fs will fail.
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf')
| -rw-r--r-- | tools/testing/selftests/bpf/bpf_helpers.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/bpf_helpers.h b/tools/testing/selftests/bpf/bpf_helpers.h index fd9a17fa8a8b..33cb00e46c49 100644 --- a/tools/testing/selftests/bpf/bpf_helpers.h +++ b/tools/testing/selftests/bpf/bpf_helpers.h @@ -82,7 +82,8 @@ static int (*bpf_perf_event_read_value)(void *map, unsigned long long flags, static int (*bpf_perf_prog_read_value)(void *ctx, void *buf, unsigned int buf_size) = (void *) BPF_FUNC_perf_prog_read_value; - +static int (*bpf_override_return)(void *ctx, unsigned long rc) = + (void *) BPF_FUNC_override_return; /* llvm builtin functions that eBPF C program may use to * emit BPF_LD_ABS and BPF_LD_IND instructions |