Fix: rotation thread does not unregister from RCU on init error

[lttng-tools.git] / src / bin / lttng-sessiond / rotation-thread.c

diff --git a/src/bin/lttng-sessiond/rotation-thread.c b/src/bin/lttng-sessiond/rotation-thread.c
index 3747ebae7fe337713c1758ad08fe2b8c1c775f10..2e9796cc2892ad7f5b687d709ef63bd1b73d35f6 100644 (file)
--- a/src/bin/lttng-sessiond/rotation-thread.c
+++ b/src/bin/lttng-sessiond/rotation-thread.c
@@ -598,6 +598,44 @@ int check_session_rotation_pending(struct ltt_session *session,
                                session->name);
        }
 
+       if (!session->active) {
+               /*
+                * A stop command was issued during the rotation, it is
+                * up to the rotation completion check to perform the
+                * renaming of the last chunk that was produced.
+                */
+               ret = notification_thread_command_session_rotation_ongoing(
+                               notification_thread_handle,
+                               session->name,
+                               session->uid,
+                               session->gid,
+                               session->current_archive_id);
+               if (ret != LTTNG_OK) {
+                       ERR("[rotation-thread] Failed to notify notification thread of completed rotation for session %s",
+                                       session->name);
+               }
+
+               ret = rename_active_chunk(session);
+               if (ret < 0) {
+                       ERR("[rotation-thread] Failed to rename active rotation chunk");
+                       goto end;
+               }
+
+               /* Ownership of location is transferred. */
+               location = session_get_trace_archive_location(session);
+               ret = notification_thread_command_session_rotation_completed(
+                               notification_thread_handle,
+                               session->name,
+                               session->uid,
+                               session->gid,
+                               session->current_archive_id,
+                               location);
+               if (ret != LTTNG_OK) {
+                       ERR("[rotation-thread] Failed to notify notification thread of completed rotation for session %s",
+                                       session->name);
+               }
+       }
+
        ret = 0;
 end:
        if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING) {
@@ -876,12 +914,15 @@ void *thread_rotation(void *data)
                goto end;
        }
 
+       rcu_register_thread();
+       rcu_thread_online();
+
        health_register(health_sessiond, HEALTH_SESSIOND_TYPE_ROTATION);
        health_code_update();
 
        ret = init_thread_state(handle, &thread);
        if (ret) {
-               goto end;
+               goto error;
        }
 
        /* Ready to handle client connections. */
@@ -945,6 +986,8 @@ error:
        DBG("[rotation-thread] Exit");
        fini_thread_state(&thread);
        health_unregister(health_sessiond);
+       rcu_thread_offline();
+       rcu_unregister_thread();
 end:
        return NULL;
 }