Fix: duplicated kernel consumer socket locking

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

diff --git a/src/bin/lttng-sessiond/consumer.c b/src/bin/lttng-sessiond/consumer.c
index 25194460645d377ad5d0680417629f1f69d2f40b..5cbd42f6301d327abefdb159541dc7f651983e9d 100644 (file)
--- a/src/bin/lttng-sessiond/consumer.c
+++ b/src/bin/lttng-sessiond/consumer.c
@@ -731,6 +731,8 @@ error:
 
 /*
  * Send file descriptor to consumer via sock.
+ *
+ * The consumer socket lock must be held by the caller.
  */
 int consumer_send_fds(struct consumer_socket *sock, int *fds, size_t nb_fd)
 {
@@ -755,6 +757,8 @@ error:
 
 /*
  * Consumer send communication message structure to consumer.
+ *
+ * The consumer socket lock must be held by the caller.
  */
 int consumer_send_msg(struct consumer_socket *sock,
                struct lttcomm_consumer_msg *msg)
@@ -778,6 +782,8 @@ error:
 
 /*
  * Consumer send channel communication message structure to consumer.
+ *
+ * The consumer socket lock must be held by the caller.
  */
 int consumer_send_channel(struct consumer_socket *sock,
                struct lttcomm_consumer_msg *msg)
@@ -1442,7 +1448,9 @@ int consumer_snapshot_channel(struct consumer_socket *socket, uint64_t key,
        }
 
        health_code_update();
+       pthread_mutex_lock(socket->lock);
        ret = consumer_send_msg(socket, &msg);
+       pthread_mutex_unlock(socket->lock);
        if (ret < 0) {
                goto error;
        }