diff options
| author | Andrii Nakryiko <andrii@kernel.org> | 2021-12-09 11:38:35 -0800 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2021-12-10 15:29:18 -0800 |
| commit | b3ce907950350a58880b94fed2b6022f160b8b9a (patch) | |
| tree | 077877ec876560290c69d4e499bd2971c450a600 /tools/lib/bpf/libbpf.h | |
| parent | 2eda2145ebfc76569fd088f46356203fc0c785a1 (diff) | |
libbpf: Add per-program log buffer setter and getter
Allow to set user-provided log buffer on a per-program basis ([0]). This
gives great deal of flexibility in terms of which programs are loaded
with logging enabled and where corresponding logs go.
Log buffer set with bpf_program__set_log_buf() overrides kernel_log_buf
and kernel_log_size settings set at bpf_object open time through
bpf_object_open_opts, if any.
Adjust bpf_object_load_prog_instance() logic to not perform own log buf
allocation and load retry if custom log buffer is provided by the user.
[0] Closes: https://github.com/libbpf/libbpf/issues/418
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211209193840.1248570-8-andrii@kernel.org
Diffstat (limited to 'tools/lib/bpf/libbpf.h')
| -rw-r--r-- | tools/lib/bpf/libbpf.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index 5c984c63859f..dacde55bebff 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -591,8 +591,15 @@ bpf_program__set_expected_attach_type(struct bpf_program *prog, LIBBPF_API __u32 bpf_program__flags(const struct bpf_program *prog); LIBBPF_API int bpf_program__set_flags(struct bpf_program *prog, __u32 flags); + +/* Per-program log level and log buffer getters/setters. + * See bpf_object_open_opts comments regarding log_level and log_buf + * interactions. + */ LIBBPF_API __u32 bpf_program__log_level(const struct bpf_program *prog); LIBBPF_API int bpf_program__set_log_level(struct bpf_program *prog, __u32 log_level); +LIBBPF_API const char *bpf_program__log_buf(const struct bpf_program *prog, size_t *log_size); +LIBBPF_API int bpf_program__set_log_buf(struct bpf_program *prog, char *log_buf, size_t log_size); LIBBPF_API int bpf_program__set_attach_target(struct bpf_program *prog, int attach_prog_fd, |