Command metadata regenerate

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

diff --git a/src/common/relayd/relayd.c b/src/common/relayd/relayd.c
index 60b7ee84970d89dfa1125c5b46a62387dff0b1d6..acf6c38e7c54b959ad35233314801ec9c8aebf60 100644 (file)
--- a/src/common/relayd/relayd.c
+++ b/src/common/relayd/relayd.c
@@ -882,3 +882,58 @@ int relayd_send_index(struct lttcomm_relayd_sock *rsock,
 error:
        return ret;
 }
+
+/*
+ * Ask the relay to reset the metadata trace file (regeneration).
+ */
+int relayd_reset_metadata(struct lttcomm_relayd_sock *rsock,
+               uint64_t stream_id, uint64_t version)
+{
+       int ret;
+       struct lttcomm_relayd_reset_metadata msg;
+       struct lttcomm_relayd_generic_reply reply;
+
+       /* Code flow error. Safety net. */
+       assert(rsock);
+
+       /* Should have been prevented by the sessiond. */
+       if (rsock->minor < 8) {
+               ERR("Metadata regeneration unsupported before 2.8");
+               ret = -1;
+               goto error;
+       }
+
+       DBG("Relayd reset metadata stream id %" PRIu64, stream_id);
+
+       memset(&msg, 0, sizeof(msg));
+       msg.stream_id = htobe64(stream_id);
+       msg.version = htobe64(version);
+
+       /* Send command */
+       ret = send_command(rsock, RELAYD_RESET_METADATA, (void *) &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 reset metadata replied error %d", reply.ret_code);
+       } else {
+               /* Success */
+               ret = 0;
+       }
+
+       DBG("Relayd reset metadata stream id %" PRIu64 " successfully", stream_id);
+
+error:
+       return ret;
+}