Send indexes in streaming mode

[lttng-tools.git] / src / common / consumer-stream.c

diff --git a/src/common/consumer-stream.c b/src/common/consumer-stream.c
index 2bb5ce7e8adee8a235d9b5b6783b66fe5ecef7fd..920948760264405f16941f0069617513e9d27d6f 100644 (file)
--- a/src/common/consumer-stream.c
+++ b/src/common/consumer-stream.c
@@ -24,6 +24,7 @@
 #include <unistd.h>
 
 #include <common/common.h>
+#include <common/index/index.h>
 #include <common/relayd/relayd.h>
 #include <common/ust-consumer/ust-consumer.h>
 
@@ -322,3 +323,35 @@ void consumer_stream_destroy(struct lttng_consumer_stream *stream,
        /* Free stream within a RCU call. */
        consumer_stream_free(stream);
 }
+
+/*
+ * Write index of a specific stream either on the relayd or local disk.
+ *
+ * Return 0 on success or else a negative value.
+ */
+int consumer_stream_write_index(struct lttng_consumer_stream *stream,
+               struct lttng_packet_index *index)
+{
+       int ret;
+       struct consumer_relayd_sock_pair *relayd;
+
+       assert(stream);
+       assert(index);
+
+       rcu_read_lock();
+       relayd = consumer_find_relayd(stream->net_seq_idx);
+       if (relayd) {
+               ret = relayd_send_index(&relayd->control_sock, index,
+                               stream->relayd_stream_id, stream->next_net_seq_num - 1);
+       } else {
+               ret = index_write(stream->index_fd, index,
+                               sizeof(struct lttng_packet_index));
+       }
+       if (ret < 0) {
+               goto error;
+       }
+
+error:
+       rcu_read_unlock();
+       return ret;
+}