[lttng-dev] [PATCH lttng-tools] Fix: lttng-live: send HUP reply when per-PID streams are gone

[Mathieu Desnoyers]

Currently, the "HUP" reply (hung up) is only sent when a session destroy
is performed and all data has been sent. However, with per-pid buffers,
application can come and go during the tracing session, so we need to
send the HUP reply for each individual stream that is gone.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers at efficios.com>
---
 src/bin/lttng-relayd/live.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/bin/lttng-relayd/live.c b/src/bin/lttng-relayd/live.c
index 9e1085f..61acafe 100644
--- a/src/bin/lttng-relayd/live.c
+++ b/src/bin/lttng-relayd/live.c
@@ -1174,10 +1174,13 @@ static int check_index_status(struct relay_viewer_stream *vstream,
 {
 	int ret;
 
-	if (trace->session->connection_closed
+	if ((trace->session->connection_closed || rstream->closed)
 			&& rstream->index_received_seqcount
 				== vstream->index_sent_seqcount) {
-		/* Last index sent and session connection is closed. */
+		/*
+		 * Last index sent and session connection or relay
+		 * stream are closed.
+		 */
 		index->status = htobe32(LTTNG_VIEWER_INDEX_HUP);
 		goto hup;
 	} else if (rstream->beacon_ts_end != -1ULL &&
-- 
2.1.4