Fix: relayd streams can be leaked on connection error

[lttng-tools.git] / src / bin / lttng-relayd / session.c

diff --git a/src/bin/lttng-relayd/session.c b/src/bin/lttng-relayd/session.c
index f76fb4a42e7606b8ebfea427033b00e3de192020..42c29aeb0b4816f5d83437f14aa6a4f3631762aa 100644 (file)
--- a/src/bin/lttng-relayd/session.c
+++ b/src/bin/lttng-relayd/session.c
@@ -69,7 +69,6 @@ struct relay_session *session_create(const char *session_name,
        urcu_ref_init(&session->ref);
        CDS_INIT_LIST_HEAD(&session->recv_list);
        pthread_mutex_init(&session->lock, NULL);
-       pthread_mutex_init(&session->reflock, NULL);
        pthread_mutex_init(&session->recv_list_lock, NULL);
 
        session->live_timer = live_timer;
@@ -86,16 +85,7 @@ error:
 /* Should be called with RCU read-side lock held. */
 bool session_get(struct relay_session *session)
 {
-       bool has_ref = false;
-
-       pthread_mutex_lock(&session->reflock);
-       if (session->ref.refcount != 0) {
-               has_ref = true;
-               urcu_ref_get(&session->ref);
-       }
-       pthread_mutex_unlock(&session->reflock);
-
-       return has_ref;
+       return urcu_ref_get_unless_zero(&session->ref);
 }
 
 /*
@@ -178,9 +168,7 @@ void session_release(struct urcu_ref *ref)
 void session_put(struct relay_session *session)
 {
        rcu_read_lock();
-       pthread_mutex_lock(&session->reflock);
        urcu_ref_put(&session->ref, session_release);
-       pthread_mutex_unlock(&session->reflock);
        rcu_read_unlock();
 }
 
@@ -194,16 +182,8 @@ int session_close(struct relay_session *session)
        pthread_mutex_lock(&session->lock);
        DBG("closing session %" PRIu64 ": is conn already closed %d",
                        session->id, session->connection_closed);
-       if (session->connection_closed) {
-               ret = -1;
-               goto unlock;
-       }
        session->connection_closed = true;
-unlock:
        pthread_mutex_unlock(&session->lock);
-       if (ret) {
-               return ret;
-       }
 
        rcu_read_lock();
        cds_lfht_for_each_entry(session->ctf_traces_ht->ht,
@@ -238,13 +218,7 @@ int session_abort(struct relay_session *session)
 
        pthread_mutex_lock(&session->lock);
        DBG("aborting session %" PRIu64, session->id);
-       if (session->aborted) {
-               ERR("session %" PRIu64 " is already aborted", session->id);
-               ret = -1;
-               goto unlock;
-       }
        session->aborted = true;
-unlock:
        pthread_mutex_unlock(&session->lock);
        return ret;
 }