Fix: handle new streams in live mode in relayd

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

diff --git a/src/bin/lttng-relayd/main.c b/src/bin/lttng-relayd/main.c
index 8e6cb4d28a86ef35f59094c00774b177f1369cd3..730eaf203102886b206aa5d267afc2f8bc9e98b6 100644 (file)
--- a/src/bin/lttng-relayd/main.c
+++ b/src/bin/lttng-relayd/main.c
@@ -1160,11 +1160,16 @@ int relay_create_session(struct lttcomm_relayd_hdr *recv_hdr,
        session->sock = cmd->sock;
        session->minor = cmd->minor;
        session->major = cmd->major;
+       pthread_mutex_init(&session->viewer_ready_lock, NULL);
        cmd->session = session;
 
        reply.session_id = htobe64(session->id);
 
        switch (cmd->minor) {
+               case 1:
+               case 2:
+               case 3:
+                       break;
                case 4: /* LTTng sessiond 2.4 */
                default:
                        ret = cmd_create_session_2_4(cmd, session);
@@ -1203,6 +1208,8 @@ void set_viewer_ready_flag(struct relay_command *cmd)
 {
        struct relay_stream_recv_handle *node, *tmp_node;
 
+       pthread_mutex_lock(&cmd->session->viewer_ready_lock);
+
        cds_list_for_each_entry_safe(node, tmp_node, &cmd->recv_head, node) {
                struct relay_stream *stream;
 
@@ -1225,6 +1232,7 @@ void set_viewer_ready_flag(struct relay_command *cmd)
                free(node);
        }
 
+       pthread_mutex_unlock(&cmd->session->viewer_ready_lock);
        return;
 }
 
@@ -1346,11 +1354,7 @@ int relay_add_stream(struct lttcomm_relayd_hdr *recv_hdr,
         * stream message is received, this list is emptied and streams are set
         * with the viewer ready flag.
         */
-       if (stream->metadata_flag) {
-               stream->viewer_ready = 1;
-       } else {
-               queue_stream_handle(stream->stream_handle, cmd);
-       }
+       queue_stream_handle(stream->stream_handle, cmd);
 
        lttng_ht_node_init_ulong(&stream->stream_n,
                        (unsigned long) stream->stream_handle);
@@ -2128,6 +2132,11 @@ int relay_streams_sent(struct lttcomm_relayd_hdr *recv_hdr,
         */
        set_viewer_ready_flag(cmd);
 
+       /*
+        * Inform the viewer that there are new streams in the session.
+        */
+       uatomic_set(&cmd->session->new_streams, 1);
+
        reply.ret_code = htobe32(LTTNG_OK);
        send_ret = cmd->sock->ops->sendmsg(cmd->sock, &reply, sizeof(reply), 0);
        if (send_ret < 0) {