Fix bad return value on enable syscalls making it freeze

[lttng-tools.git] / lttng-sessiond / event.c

diff --git a/lttng-sessiond/event.c b/lttng-sessiond/event.c
index c7331956f91e486a5f2a06caf3f8b20f71d53f26..247a4c6d7c7cae013d586439a9194561fbcf751e 100644 (file)
--- a/lttng-sessiond/event.c
+++ b/lttng-sessiond/event.c
@@ -161,14 +161,16 @@ int event_kernel_enable_all_tracepoints(struct ltt_kernel_session *ksession,
 {
        int size, i, ret;
        struct ltt_kernel_event *kevent;
-       struct lttng_event *event_list;
+       struct lttng_event *event_list = NULL;
 
        /* For each event in the kernel session */
        cds_list_for_each_entry(kevent, &kchan->events_list.head, list) {
-               ret = kernel_enable_event(kevent);
-               if (ret < 0) {
-                       /* Enable failed but still continue */
-                       continue;
+               if (kevent->enabled == 0) {
+                       ret = kernel_enable_event(kevent);
+                       if (ret < 0) {
+                               /* Enable failed but still continue */
+                               continue;
+                       }
                }
        }
 
@@ -191,6 +193,7 @@ int event_kernel_enable_all_tracepoints(struct ltt_kernel_session *ksession,
                }
        }
        free(event_list);
+
        ret = LTTCOMM_OK;
 end:
        return ret;
@@ -212,8 +215,14 @@ int event_kernel_enable_all_syscalls(struct ltt_kernel_session *ksession,
 
        ret = kernel_create_event(&event, kchan);
        if (ret < 0) {
+               if (ret == -EEXIST) {
+                       ret = LTTCOMM_KERN_EVENT_EXIST;
+               } else {
+                       ret = LTTCOMM_KERN_ENABLE_FAIL;
+               }
                goto end;
        }
+
        ret = LTTCOMM_OK;
 end:
        return ret;