Cleanup: Extract `ust_app_synchronize_all_channels()` function

Signed-off-by: Francis Deslauriers <francis.deslauriers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Change-Id: Id24eff10cc07c5e061fbb45e871087c17eac9b1d

diff --git a/src/bin/lttng-sessiond/ust-app.c b/src/bin/lttng-sessiond/ust-app.c
index 2a5ec9e23bdd4260595edf111230266d792a600b..50d2f1932657e56f7863e5b23fd3ef8b48cad87d 100644 (file)
--- a/src/bin/lttng-sessiond/ust-app.c
+++ b/src/bin/lttng-sessiond/ust-app.c
@@ -5735,38 +5735,20 @@ end:
 }
 
 /*
- * The caller must ensure that the application is compatible and is tracked
- * by the process attribute trackers.
+ * RCU read lock must be held by the caller.
  */
 static
-void ust_app_synchronize(struct ltt_ust_session *usess,
+void ust_app_synchronize_all_channels(struct ltt_ust_session *usess,
+               struct ust_app_session *ua_sess,
                struct ust_app *app)
 {
        int ret = 0;
        struct cds_lfht_iter uchan_iter;
        struct ltt_ust_channel *uchan;
-       struct ust_app_session *ua_sess = NULL;
 
-       /*
-        * The application's configuration should only be synchronized for
-        * active sessions.
-        */
-       assert(usess->active);
-
-       ret = find_or_create_ust_app_session(usess, app, &ua_sess, NULL);
-       if (ret < 0) {
-               /* Tracer is probably gone or ENOMEM. */
-               goto error;
-       }
+       assert(usess);
        assert(ua_sess);
-
-       pthread_mutex_lock(&ua_sess->lock);
-       if (ua_sess->deleted) {
-               pthread_mutex_unlock(&ua_sess->lock);
-               goto end;
-       }
-
-       rcu_read_lock();
+       assert(app);
 
        cds_lfht_for_each_entry(usess->domain_global.channels->ht, &uchan_iter,
                        uchan, node.node) {
@@ -5785,7 +5767,7 @@ void ust_app_synchronize(struct ltt_ust_session *usess,
                        app, uchan, &ua_chan);
                if (ret) {
                        /* Tracer is probably gone or ENOMEM. */
-                       goto error_unlock;
+                       goto end;
                }
 
                if (!ua_chan) {
@@ -5798,7 +5780,7 @@ void ust_app_synchronize(struct ltt_ust_session *usess,
                        ret = ust_app_channel_synchronize_event(ua_chan,
                                uevent, ua_sess, app);
                        if (ret) {
-                               goto error_unlock;
+                               goto end;
                        }
                }
 
@@ -5807,10 +5789,47 @@ void ust_app_synchronize(struct ltt_ust_session *usess,
                                enable_ust_app_channel(ua_sess, uchan, app) :
                                disable_ust_app_channel(ua_sess, ua_chan, app);
                        if (ret) {
-                               goto error_unlock;
+                               goto end;
                        }
                }
        }
+end:
+       return;
+}
+
+/*
+ * The caller must ensure that the application is compatible and is tracked
+ * by the process attribute trackers.
+ */
+static
+void ust_app_synchronize(struct ltt_ust_session *usess,
+               struct ust_app *app)
+{
+       int ret = 0;
+       struct ust_app_session *ua_sess = NULL;
+
+       /*
+        * The application's configuration should only be synchronized for
+        * active sessions.
+        */
+       assert(usess->active);
+
+       ret = find_or_create_ust_app_session(usess, app, &ua_sess, NULL);
+       if (ret < 0) {
+               /* Tracer is probably gone or ENOMEM. */
+               goto error;
+       }
+       assert(ua_sess);
+
+       pthread_mutex_lock(&ua_sess->lock);
+       if (ua_sess->deleted) {
+               pthread_mutex_unlock(&ua_sess->lock);
+               goto end;
+       }
+
+       rcu_read_lock();
+
+       ust_app_synchronize_all_channels(usess, ua_sess, app);
 
        /*
         * Create the metadata for the application. This returns gracefully if a