Library log level is added and new API to set the desired level.
Log levels defined in libtraceevent are used. By default, the log level
of tracefs library is TEP_LOG_CRITICAL. When a new level is set, it is
also propagated to the libtraceevent.
Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@xxxxxxxxx>
---
include/tracefs.h | 4 ++++
src/tracefs-utils.c | 18 +++++++++++++++++-
2 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/include/tracefs.h b/include/tracefs.h
index 73ee42b..08dda13 100644
--- a/include/tracefs.h
+++ b/include/tracefs.h
@@ -180,4 +180,8 @@ int tracefs_function_filter(struct tracefs_instance *instance, const char *filte
int tracefs_function_notrace(struct tracefs_instance *instance, const char *filter,
const char *module, unsigned int flags);
+
+/* Control library logs */
+void tracefs_set_loglevel(enum tep_loglevel level);
+
#endif /* _TRACE_FS_H */
diff --git a/src/tracefs-utils.c b/src/tracefs-utils.c
index e10b333..9e37e75 100644
--- a/src/tracefs-utils.c
+++ b/src/tracefs-utils.c
@@ -15,6 +15,7 @@
#include <unistd.h>
#include <errno.h>
+#include <traceevent/event-parse.h>
#include <traceevent/event-utils.h>
#include "tracefs.h"
#include "tracefs-local.h"
@@ -25,12 +26,27 @@
#define _STR(x) #x
#define STR(x) _STR(x)
+static int log_level = TEP_LOG_CRITICAL;
+
+/**
+ * tracefs_set_loglevel - set log level of the library
+ * @level: desired level of the library messages
+ */
+void tracefs_set_loglevel(enum tep_loglevel level)
+{
+ log_level = level;
+ tep_set_loglevel(level);
+}
+
void __weak tracefs_warning(const char *fmt, ...)
{
va_list ap;
+ if (log_level < TEP_LOG_WARNING)
+ return;
+
va_start(ap, fmt);
- tep_vwarning("libtracefs", fmt, ap);
+ tep_vprint("libtracefs", TEP_LOG_WARNING, true, fmt, ap);
va_end(ap);
}
--
2.31.1
|