Fix: don't chain RCU free

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

diff --git a/src/bin/lttng-sessiond/trace-ust.c b/src/bin/lttng-sessiond/trace-ust.c
index 0fca3b33a85bde64ff8173fe55b2693a9214956f..b70d63673fd8ed9d275d39066a39be3dc2c04380 100644 (file)
--- a/src/bin/lttng-sessiond/trace-ust.c
+++ b/src/bin/lttng-sessiond/trace-ust.c
@@ -284,14 +284,6 @@ struct ltt_ust_session *trace_ust_create_session(uint64_t session_id)
                goto error_consumer;
        }
 
-       /*
-        * The tmp_consumer stays NULL until a set_consumer_uri command is
-        * executed. At this point, the consumer should be nullify until an
-        * enable_consumer command. This assignment is symbolic since we've zmalloc
-        * the struct.
-        */
-       lus->tmp_consumer = NULL;
-
        DBG2("UST trace session create successful");
 
        return lus;
@@ -960,11 +952,6 @@ static void _trace_ust_destroy_channel(struct ltt_ust_channel *channel)
 
        DBG2("Trace destroy UST channel %s", channel->name);
 
-       /* Destroying all events of the channel */
-       destroy_events(channel->events);
-       /* Destroying all context of the channel */
-       destroy_contexts(channel->ctx);
-
        free(channel);
 }
 
@@ -983,6 +970,11 @@ static void destroy_channel_rcu(struct rcu_head *head)
 
 void trace_ust_destroy_channel(struct ltt_ust_channel *channel)
 {
+       /* Destroying all events of the channel */
+       destroy_events(channel->events);
+       /* Destroying all context of the channel */
+       destroy_contexts(channel->ctx);
+
        call_rcu(&channel->node.head, destroy_channel_rcu);
 }
 
@@ -1008,18 +1000,18 @@ void trace_ust_delete_channel(struct lttng_ht *ht,
  */
 static void destroy_channels(struct lttng_ht *channels)
 {
-       int ret;
        struct lttng_ht_node_str *node;
        struct lttng_ht_iter iter;
 
        assert(channels);
 
        rcu_read_lock();
-
        cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) {
-               ret = lttng_ht_del(channels, &iter);
-               assert(!ret);
-               call_rcu(&node->head, destroy_channel_rcu);
+               struct ltt_ust_channel *chan =
+                       caa_container_of(node, struct ltt_ust_channel, node);
+
+               trace_ust_delete_channel(channels, chan);
+               trace_ust_destroy_channel(chan);
        }
        rcu_read_unlock();
 
@@ -1073,8 +1065,7 @@ void trace_ust_destroy_session(struct ltt_ust_session *session)
                buffer_reg_uid_destroy(reg, session->consumer);
        }
 
-       consumer_destroy_output(session->consumer);
-       consumer_destroy_output(session->tmp_consumer);
+       consumer_output_put(session->consumer);
 
        fini_pid_tracker(&session->pid_tracker);