From: Mykyta Yatsenko <yatsenko@xxxxxxxx>
Configure logging verbosity by setting LIBBPF_LOG environment
variable. Only applying to default logger. Once user set their custom
logging callback, it is up to them to filter.
Signed-off-by: Mykyta Yatsenko <yatsenko@xxxxxxxx>
---
tools/lib/bpf/libbpf.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 5401f2df463d..8805607073da 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -229,7 +229,23 @@ static const char * const prog_type_name[] = {
static int __base_pr(enum libbpf_print_level level, const char *format,
va_list args)
{
- if (level == LIBBPF_DEBUG)
+ static enum libbpf_print_level env_level = LIBBPF_INFO;
+ static bool initialized;
+
+ if (!initialized) {
+ char *verbosity;
+
+ initialized = true;
+ verbosity = getenv("LIBBPF_LOG");
+ if (verbosity) {
+ if (strcmp(verbosity, "warn") == 0)
+ env_level = LIBBPF_WARN;
+ else if (strcmp(verbosity, "debug") == 0)
+ env_level = LIBBPF_DEBUG;
+ }
+ }
+
+ if (env_level < level)
return 0;
return vfprintf(stderr, format, args);
--
2.45.0
