Send indexes in streaming mode

[lttng-tools.git] / src / common / relayd / relayd.c

diff --git a/src/common/relayd/relayd.c b/src/common/relayd/relayd.c
index 2283865cf0d86be6c905baa287fd5809f17af8f2..bb20a64a0cc5d6cb8ffc04f2439c0c581f71803b 100644 (file)
--- a/src/common/relayd/relayd.c
+++ b/src/common/relayd/relayd.c
@@ -26,6 +26,7 @@
 #include <common/common.h>
 #include <common/defaults.h>
 #include <common/sessiond-comm/relayd.h>
+#include <common/index/lttng-index.h>
 
 #include "relayd.h"
 
@@ -671,3 +672,63 @@ int relayd_end_data_pending(struct lttcomm_relayd_sock *rsock, uint64_t id,
 error:
        return ret;
 }
+
+/*
+ * Send index to the relayd.
+ */
+int relayd_send_index(struct lttcomm_relayd_sock *rsock,
+               struct lttng_packet_index *index, uint64_t relay_stream_id,
+               uint64_t net_seq_num)
+{
+       int ret;
+       struct lttcomm_relayd_index msg;
+       struct lttcomm_relayd_generic_reply reply;
+
+       /* Code flow error. Safety net. */
+       assert(rsock);
+
+       if (rsock->minor < 4) {
+               DBG("Not sending indexes before protocol 2.4");
+               ret = 0;
+               goto error;
+       }
+
+       DBG("Relayd sending index for stream ID %" PRIu64, relay_stream_id);
+
+       msg.relay_stream_id = htobe64(relay_stream_id);
+       msg.net_seq_num = htobe64(net_seq_num);
+
+       /* The index is already in big endian. */
+       msg.packet_size = index->packet_size;
+       msg.content_size = index->content_size;
+       msg.timestamp_begin = index->timestamp_begin;
+       msg.timestamp_end = index->timestamp_end;
+       msg.events_discarded = index->events_discarded;
+       msg.stream_id = index->stream_id;
+
+       /* Send command */
+       ret = send_command(rsock, RELAYD_SEND_INDEX, &msg, sizeof(msg), 0);
+       if (ret < 0) {
+               goto error;
+       }
+
+       /* Receive response */
+       ret = recv_reply(rsock, (void *) &reply, sizeof(reply));
+       if (ret < 0) {
+               goto error;
+       }
+
+       reply.ret_code = be32toh(reply.ret_code);
+
+       /* Return session id or negative ret code. */
+       if (reply.ret_code != LTTNG_OK) {
+               ret = -1;
+               ERR("Relayd send index replied error %d", reply.ret_code);
+       } else {
+               /* Success */
+               ret = 0;
+       }
+
+error:
+       return ret;
+}