[PATCH] libtracefs: Have tracefs_instance_tracers() return instance tracers

[Steven Rostedt <rostedt@xxxxxxxxxxx>]

From: "Steven Rostedt (Google)" <rostedt@xxxxxxxxxxx>

The tracefs_instance_tracers() was always returning the top level tracers
and not the tracers that were available for the given instance.

Fixes: 185019c0 ("libtracefs: Add tracefs_instance_tracers() API")
Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
---
 src/tracefs-events.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/src/tracefs-events.c b/src/tracefs-events.c
index 83069aa..77d1ba8 100644
--- a/src/tracefs-events.c
+++ b/src/tracefs-events.c
@@ -1012,12 +1012,20 @@ char **tracefs_tracers(const char *tracing_dir)
  */
 char **tracefs_instance_tracers(struct tracefs_instance *instance)
 {
-	const char *tracing_dir = NULL;
+	char *tracing_dir = NULL;
+	char **list;
+	int ret;
 
-	if (instance)
-		tracing_dir = instance->trace_dir;
+	if (instance) {
+		ret = asprintf(&tracing_dir, "%s/instances/%s", instance->trace_dir,
+			       instance->name);
+		if (ret < 0)
+			return NULL;
+	}
 
-	return list_tracers(tracing_dir);
+	list = list_tracers(tracing_dir);
+	free(tracing_dir);
+	return list;
 }
 
 static int load_events(struct tep_handle *tep,
-- 
2.43.0