diff options
| author | Mykyta Yatsenko <yatsenko@meta.com> | 2024-05-24 14:18:40 +0100 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2024-05-28 16:25:06 -0700 |
| commit | eb4e7726279a344c82e3c23be396bcfd0a4d5669 (patch) | |
| tree | 4aca2e5c18389f01ec9919e13ea4f728792b474b /tools/lib/bpf/libbpf.h | |
| parent | 4b3529edbb8ff069d762c6947e055e10c1748170 (diff) | |
libbpf: Configure log verbosity with env variable
Configure logging verbosity by setting LIBBPF_LOG_LEVEL environment
variable, which is applied only to default logger. Once user set their
custom logging callback, it is up to them to handle filtering.
Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20240524131840.114289-1-yatsenko@meta.com
Diffstat (limited to 'tools/lib/bpf/libbpf.h')
| -rw-r--r-- | tools/lib/bpf/libbpf.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index c3f77d9260fe..26e4e35528c5 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -98,7 +98,10 @@ typedef int (*libbpf_print_fn_t)(enum libbpf_print_level level, /** * @brief **libbpf_set_print()** sets user-provided log callback function to - * be used for libbpf warnings and informational messages. + * be used for libbpf warnings and informational messages. If the user callback + * is not set, messages are logged to stderr by default. The verbosity of these + * messages can be controlled by setting the environment variable + * LIBBPF_LOG_LEVEL to either warn, info, or debug. * @param fn The log print function. If NULL, libbpf won't print anything. * @return Pointer to old print function. * |