diff options
| author | Andrii Nakryiko <andriin@fb.com> | 2019-11-06 12:15:00 -0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2019-11-06 13:54:59 -0800 |
| commit | ed578021210e14f15a654c825fba6a700c9a39a7 (patch) | |
| tree | 0c47815ef3f5ba07f5e0e1262b9a6127fed70bca /tools/lib/bpf/bpf_prog_linfo.c | |
| parent | 65a052d537f40e992eb1629cc6c25874064f51fd (diff) | |
libbpf: Simplify BPF_CORE_READ_BITFIELD_PROBED usage
Streamline BPF_CORE_READ_BITFIELD_PROBED interface to follow
BPF_CORE_READ_BITFIELD (direct) and BPF_CORE_READ, in general, i.e., just
return read result or 0, if underlying bpf_probe_read() failed.
In practice, real applications rarely check bpf_probe_read() result, because
it has to always work or otherwise it's a bug. So propagating internal
bpf_probe_read() error from this macro hurts usability without providing real
benefits in practice. This patch fixes the issue and simplifies usage,
noticeable even in selftest itself.
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20191106201500.2582438-1-andriin@fb.com
Diffstat (limited to 'tools/lib/bpf/bpf_prog_linfo.c')
0 files changed, 0 insertions, 0 deletions