Fix relayd: stream index file created in the wrong directory

[lttng-tools.git] / src / bin / lttng-relayd / stream.h

diff --git a/src/bin/lttng-relayd/stream.h b/src/bin/lttng-relayd/stream.h
index ae75dacc3a061e1d77e16445f1f3d0371baf0db9..dcdacfbb6d3fcbf6c3b88a32a1cf8d2e0fec0d2a 100644 (file)
--- a/src/bin/lttng-relayd/stream.h
+++ b/src/bin/lttng-relayd/stream.h
@@ -65,6 +65,20 @@ struct relay_stream {
        struct lttng_index_file *index_file;
 
        char *path_name;
+       /*
+        * prev_path_name is only used for session rotation support.
+        * It is essentially used to work around the fact that index
+        * files are always created from the 'data' connection.
+        *
+        * Hence, it is possible to receive a ROTATE_STREAM command
+        * which affects the stream's path_name before the creation of
+        * an index file. In this situation, the index file of the
+        * 'previous' chunk would be created in the new destination folder.
+        *
+        * It would then be unlinked when the actual index of the new chunk
+        * is created.
+        */
+       char *prev_path_name;
        char *channel_name;
 
        /* On-disk circular buffer of tracefiles. */