Launch the rotation thread using lttng_thread

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

diff --git a/src/bin/lttng-sessiond/main.c b/src/bin/lttng-sessiond/main.c
index 8820fdbddca9ee8e177063c290be0f917e92ea72..0c207309dbb0714ed24c78e55c8072b1f15154b1 100644 (file)
--- a/src/bin/lttng-sessiond/main.c
+++ b/src/bin/lttng-sessiond/main.c
@@ -194,8 +194,6 @@ static pthread_t kernel_thread;
 static pthread_t dispatch_thread;
 static pthread_t agent_reg_thread;
 static pthread_t load_session_thread;
-static pthread_t notification_thread;
-static pthread_t rotation_thread;
 static pthread_t timer_thread;
 
 /*
@@ -256,9 +254,6 @@ static const char * const config_section_name = "sessiond";
 /* Am I root or not. Set to 1 if the daemon is running as root */
 static int is_root;
 
-/* Rotation thread handle. */
-static struct rotation_thread_handle *rotation_thread_handle;
-
 /*
  * Stop all threads by closing the thread quit pipe.
  */
@@ -5497,14 +5492,13 @@ int main(int argc, char **argv)
        struct lttng_pipe *ust32_channel_monitor_pipe = NULL,
                        *ust64_channel_monitor_pipe = NULL,
                        *kernel_channel_monitor_pipe = NULL;
-       bool notification_thread_launched = false;
-       bool rotation_thread_launched = false;
        bool timer_thread_launched = false;
        struct lttng_thread *ht_cleanup_thread = NULL;
        struct timer_thread_parameters timer_thread_ctx;
+       /* Rotation thread handle. */
+       struct rotation_thread_handle *rotation_thread_handle = NULL;
        /* Queue of rotation jobs populated by the sessiond-timer. */
        struct rotation_thread_timer_queue *rotation_timer_queue = NULL;
-       sem_t notification_thread_ready;
 
        init_kernel_workarounds();
 
@@ -5853,37 +5847,23 @@ int main(int argc, char **argv)
                goto exit_health;
        }
 
-       /*
-        * The rotation thread needs the notification thread to be ready before
-        * creating the rotate_notification_channel, so we use this semaphore as
-        * a rendez-vous point.
-        */
-       sem_init(&notification_thread_ready, 0, 0);
-
        /* notification_thread_data acquires the pipes' read side. */
        notification_thread_handle = notification_thread_handle_create(
                        ust32_channel_monitor_pipe,
                        ust64_channel_monitor_pipe,
-                       kernel_channel_monitor_pipe,
-                       &notification_thread_ready);
+                       kernel_channel_monitor_pipe);
        if (!notification_thread_handle) {
                retval = -1;
                ERR("Failed to create notification thread shared data");
-               stop_threads();
                goto exit_notification;
        }
 
        /* Create notification thread. */
-       ret = pthread_create(&notification_thread, default_pthread_attr(),
-                       thread_notification, notification_thread_handle);
-       if (ret) {
-               errno = ret;
-               PERROR("pthread_create notification");
+       if (!launch_notification_thread(notification_thread_handle)) {
                retval = -1;
-               stop_threads();
                goto exit_notification;
+
        }
-       notification_thread_launched = true;
 
        /* Create timer thread. */
        ret = pthread_create(&timer_thread, default_pthread_attr(),
@@ -5900,8 +5880,7 @@ int main(int argc, char **argv)
        /* rotation_thread_data acquires the pipes' read side. */
        rotation_thread_handle = rotation_thread_handle_create(
                        rotation_timer_queue,
-                       notification_thread_handle,
-                       &notification_thread_ready);
+                       notification_thread_handle);
        if (!rotation_thread_handle) {
                retval = -1;
                ERR("Failed to create rotation thread shared data");
@@ -5910,16 +5889,10 @@ int main(int argc, char **argv)
        }
 
        /* Create rotation thread. */
-       ret = pthread_create(&rotation_thread, default_pthread_attr(),
-                       thread_rotation, rotation_thread_handle);
-       if (ret) {
-               errno = ret;
-               PERROR("pthread_create rotation");
+       if (!launch_rotation_thread(rotation_thread_handle)) {
                retval = -1;
-               stop_threads();
                goto exit_rotation;
        }
-       rotation_thread_launched = true;
 
        /* Create thread to manage the client socket */
        ret = pthread_create(&client_thread, default_pthread_attr(),
@@ -6093,7 +6066,6 @@ exit_dispatch:
 exit_client:
 exit_rotation:
 exit_notification:
-       sem_destroy(&notification_thread_ready);
        lttng_thread_list_shutdown_orphans();
 exit_health:
 exit_init_data:
@@ -6117,37 +6089,6 @@ exit_init_data:
         */
        rcu_barrier();
 
-       /*
-        * The teardown of the notification system is performed after the
-        * session daemon's teardown in order to allow it to be notified
-        * of the active session and channels at the moment of the teardown.
-        */
-       if (notification_thread_handle) {
-               if (notification_thread_launched) {
-                       notification_thread_command_quit(
-                                       notification_thread_handle);
-                       ret = pthread_join(notification_thread, &status);
-                       if (ret) {
-                               errno = ret;
-                               PERROR("pthread_join notification thread");
-                               retval = -1;
-                       }
-               }
-               notification_thread_handle_destroy(notification_thread_handle);
-       }
-
-       if (rotation_thread_handle) {
-               if (rotation_thread_launched) {
-                       ret = pthread_join(rotation_thread, &status);
-                       if (ret) {
-                               errno = ret;
-                               PERROR("pthread_join rotation thread");
-                               retval = -1;
-                       }
-               }
-               rotation_thread_handle_destroy(rotation_thread_handle);
-       }
-
        if (timer_thread_launched) {
                timer_exit();
                ret = pthread_join(timer_thread, &status);
@@ -6163,15 +6104,26 @@ exit_init_data:
                lttng_thread_put(ht_cleanup_thread);
        }
 
+       rcu_thread_offline();
+       rcu_unregister_thread();
+
+       if (rotation_thread_handle) {
+               rotation_thread_handle_destroy(rotation_thread_handle);
+       }
+
        /*
         * After the rotation and timer thread have quit, we can safely destroy
         * the rotation_timer_queue.
         */
        rotation_thread_timer_queue_destroy(rotation_timer_queue);
-
-       rcu_thread_offline();
-       rcu_unregister_thread();
-
+       /*
+        * The teardown of the notification system is performed after the
+        * session daemon's teardown in order to allow it to be notified
+        * of the active session and channels at the moment of the teardown.
+        */
+       if (notification_thread_handle) {
+               notification_thread_handle_destroy(notification_thread_handle);
+       }
        lttng_pipe_destroy(ust32_channel_monitor_pipe);
        lttng_pipe_destroy(ust64_channel_monitor_pipe);
        lttng_pipe_destroy(kernel_channel_monitor_pipe);