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| author | Mykyta Yatsenko <yatsenko@meta.com> | 2024-05-24 16:18:40 +0300 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2024-05-29 02:25:06 +0300 |
| commit | eb4e7726279a344c82e3c23be396bcfd0a4d5669 (patch) | |
| tree | 4aca2e5c18389f01ec9919e13ea4f728792b474b /Documentation/bpf | |
| parent | 4b3529edbb8ff069d762c6947e055e10c1748170 (diff) | |
| download | linux-eb4e7726279a344c82e3c23be396bcfd0a4d5669.tar.xz | |
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 'Documentation/bpf')
| -rw-r--r-- | Documentation/bpf/libbpf/libbpf_overview.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/bpf/libbpf/libbpf_overview.rst b/Documentation/bpf/libbpf/libbpf_overview.rst index f36a2d4ffea2..f4d22f0c62b0 100644 --- a/Documentation/bpf/libbpf/libbpf_overview.rst +++ b/Documentation/bpf/libbpf/libbpf_overview.rst @@ -219,6 +219,14 @@ compilation and skeleton generation. Using Libbpf-rs will make building user space part of the BPF application easier. Note that the BPF program themselves must still be written in plain C. +libbpf logging +============== + +By default, libbpf logs informational and warning messages to stderr. The +verbosity of these messages can be controlled by setting the environment +variable LIBBPF_LOG_LEVEL to either warn, info, or debug. A custom log +callback can be set using ``libbpf_set_print()``. + Additional Documentation ======================== |