+} LTTNG_PACKED;
+
+/*
+ * Used to test if for a given stream id the data is pending on the relayd side
+ * for reading.
+ */
+struct lttcomm_relayd_data_pending {
+ uint64_t stream_id;
+ uint64_t last_net_seq_num; /* Sequence number of the last packet */
+} LTTNG_PACKED;
+
+struct lttcomm_relayd_begin_data_pending {
+ uint64_t session_id;
+} LTTNG_PACKED;
+
+struct lttcomm_relayd_end_data_pending {
+ uint64_t session_id;
+} LTTNG_PACKED;
+
+struct lttcomm_relayd_quiescent_control {
+ uint64_t stream_id;
+} LTTNG_PACKED;
+
+/*
+ * Index data.
+ */
+struct lttcomm_relayd_index {
+ uint64_t relay_stream_id;
+ uint64_t net_seq_num;
+ uint64_t packet_size;
+ uint64_t content_size;
+ uint64_t timestamp_begin;
+ uint64_t timestamp_end;
+ uint64_t events_discarded;
+ uint64_t stream_id;
+ /* 2.8+ */
+ uint64_t stream_instance_id;
+ uint64_t packet_seq_num;
+} LTTNG_PACKED;
+
+static inline size_t lttcomm_relayd_index_len(uint32_t major, uint32_t minor)
+{
+ if (major == 1) {
+ switch (minor) {
+ case 0:
+ return offsetof(struct lttcomm_relayd_index, stream_id)
+ + member_sizeof(struct lttcomm_relayd_index,
+ stream_id);
+ case 1:
+ return offsetof(struct lttcomm_relayd_index, packet_seq_num)
+ + member_sizeof(struct lttcomm_relayd_index,
+ packet_seq_num);
+ default:
+ abort();
+ }
+ }
+ abort();
+}
+
+/*
+ * Create session in 2.4 adds additionnal parameters for live reading.
+ */
+struct lttcomm_relayd_create_session_2_4 {
+ char session_name[RELAYD_COMM_LTTNG_NAME_MAX_2_4];
+ char hostname[RELAYD_COMM_LTTNG_HOST_NAME_MAX_2_4];
+ uint32_t live_timer;
+ uint32_t snapshot;
+} LTTNG_PACKED;
+
+struct lttcomm_relayd_create_session_2_11 {
+ uint32_t session_name_len;
+ uint32_t hostname_len;
+ uint32_t live_timer;
+ uint8_t snapshot;
+ /* Sessiond instance UUID */
+ lttng_uuid sessiond_uuid;
+ /* Sessiond session id */
+ uint64_t session_id;
+ /* Session creation time, in seconds since UNIX Epoch. */
+ uint64_t creation_time;
+ LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED current_chunk_id;
+ /* Contains the session_name and hostname */
+ char names[];
+} LTTNG_PACKED;
+
+/*
+ * Used to ask the relay to reset the metadata trace file (regeneration).
+ * Send the new version of the metadata (starts at 0).
+ */
+struct lttcomm_relayd_reset_metadata {
+ uint64_t stream_id;
+ uint64_t version;
+} LTTNG_PACKED;
+
+struct lttcomm_relayd_rotate_stream {
+ uint64_t stream_id;
+ /* Ignored for metadata streams. */
+ uint64_t rotate_at_seq_num;
+ uint64_t new_chunk_id;
+ /* Includes trailing NULL. */
+ uint32_t pathname_length;
+ /* Must be the last member of this structure. */
+ char new_pathname[];
+} LTTNG_PACKED;
+
+struct lttcomm_relayd_create_trace_chunk {
+ uint64_t chunk_id;
+ /* Seconds since EPOCH. */
+ uint64_t creation_timestamp;
+ /* Includes trailing NULL. */
+ uint32_t override_name_length;
+ char override_name[];
+} LTTNG_PACKED;
+
+struct lttcomm_relayd_close_trace_chunk {
+ uint64_t chunk_id;
+ /* Seconds since EPOCH. */
+ uint64_t close_timestamp;
+ /* enum lttng_trace_chunk_command_type */
+ LTTNG_OPTIONAL_COMM(uint32_t) LTTNG_PACKED close_command;
+} LTTNG_PACKED;