From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Tue, 25 Aug 2015 13:00:50 +0000 (-0400)
Subject: Fix: ask new streams HUP
X-Git-Tag: v2.8.0-rc1~414
X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=commitdiff_plain;h=2229a09cabb924fb3e8c73d283895510f946a6b2

Fix: ask new streams HUP

Test closed streams for content to check for HUP.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
---

diff --git a/src/bin/lttng-relayd/live.c b/src/bin/lttng-relayd/live.c
index c41659ac5..096c855f6 100644
--- a/src/bin/lttng-relayd/live.c
+++ b/src/bin/lttng-relayd/live.c
@@ -327,17 +327,34 @@ int make_viewer_streams(struct relay_session *session,
 					/* Update number of created stream counter. */
 					(*nb_created)++;
 				}
+				/*
+				 * Ensure a self-reference is preserved even
+				 * after we have put our local reference.
+				 */
+				viewer_stream_get(vstream);
 			} else {
 				if (!vstream->sent_flag && nb_unsent) {
 					/* Update number of unsent stream counter. */
 					(*nb_unsent)++;
 				}
-				viewer_stream_put(vstream);
 			}
 			/* Update number of total stream counter. */
 			if (nb_total) {
-				(*nb_total)++;
+				if (stream->is_metadata) {
+					if (!stream->closed ||
+							stream->metadata_received > vstream->metadata_sent) {
+						(*nb_total)++;
+					}
+				} else {
+					if (!stream->closed ||
+						!(((int64_t) (stream->prev_seq - stream->last_net_seq_num)) >= 0)) {
+
+						(*nb_total)++;
+					}
+				}
 			}
+			/* Put local reference. */
+			viewer_stream_put(vstream);
 		next:
 			stream_put(stream);
 		}
@@ -911,7 +928,8 @@ int viewer_get_new_streams(struct relay_connection *conn)
 	response.streams_count = htobe32(nb_streams);
 
 	/*
-	 * If the session is closed, HUP when there are no more streams.
+	 * If the session is closed, HUP when there are no more streams
+	 * with data.
 	 */
 	if (closed && nb_total == 0) {
 		send_streams = 0;
diff --git a/src/bin/lttng-relayd/stream.c b/src/bin/lttng-relayd/stream.c
index af4ef1bbb..3f76b1e6a 100644
--- a/src/bin/lttng-relayd/stream.c
+++ b/src/bin/lttng-relayd/stream.c
@@ -332,6 +332,7 @@ void stream_close(struct relay_stream *stream)
 {
 	DBG("closing stream %" PRIu64, stream->stream_handle);
 	pthread_mutex_lock(&stream->lock);
+	stream->closed = true;
 	relay_index_close_all(stream);
 	pthread_mutex_unlock(&stream->lock);
 	stream_put(stream);