+
+int relayd_rotate_streams(struct lttcomm_relayd_sock *sock,
+ unsigned int stream_count, const uint64_t *new_chunk_id,
+ const struct relayd_stream_rotation_position *positions)
+{
+ int ret;
+ unsigned int i;
+ struct lttng_dynamic_buffer payload;
+ struct lttcomm_relayd_generic_reply reply = {};
+ const struct lttcomm_relayd_rotate_streams msg = {
+ .stream_count = htobe32((uint32_t) stream_count),
+ .new_chunk_id = (typeof(msg.new_chunk_id)) {
+ .is_set = !!new_chunk_id,
+ .value = htobe64(new_chunk_id ? *new_chunk_id : 0),
+ },
+ };
+ char new_chunk_id_buf[MAX_INT_DEC_LEN(*new_chunk_id)] = {};
+ const char *new_chunk_id_str;
+
+ if (!relayd_supports_chunks(sock)) {
+ DBG("Refusing to rotate remote streams: relayd does not support chunks");
+ return 0;
+ }
+
+ lttng_dynamic_buffer_init(&payload);
+
+ /* Code flow error. Safety net. */
+ assert(sock);
+
+ if (new_chunk_id) {
+ ret = snprintf(new_chunk_id_buf, sizeof(new_chunk_id_buf),
+ "%" PRIu64, *new_chunk_id);
+ if (ret == -1 || ret >= sizeof(new_chunk_id_buf)) {
+ new_chunk_id_str = "formatting error";
+ } else {
+ new_chunk_id_str = new_chunk_id_buf;
+ }
+ } else {
+ new_chunk_id_str = "none";
+ }
+
+ DBG("Preparing \"rotate streams\" command payload: new_chunk_id = %s, stream_count = %u",
+ new_chunk_id_str, stream_count);
+
+ ret = lttng_dynamic_buffer_append(&payload, &msg, sizeof(msg));
+ if (ret) {
+ ERR("Failed to allocate \"rotate streams\" command payload");
+ goto error;
+ }
+
+ for (i = 0; i < stream_count; i++) {
+ const struct relayd_stream_rotation_position *position =
+ &positions[i];
+ const struct lttcomm_relayd_stream_rotation_position comm_position = {
+ .stream_id = htobe64(position->stream_id),
+ .rotate_at_seq_num = htobe64(
+ position->rotate_at_seq_num),
+ };
+
+ DBG("Rotate stream %" PRIu64 "at sequence number %" PRIu64,
+ position->stream_id,
+ position->rotate_at_seq_num);
+ ret = lttng_dynamic_buffer_append(&payload, &comm_position,
+ sizeof(comm_position));
+ if (ret) {
+ ERR("Failed to allocate \"rotate streams\" command payload");
+ goto error;
+ }
+ }
+
+ /* Send command. */
+ ret = send_command(sock, RELAYD_ROTATE_STREAMS, payload.data,
+ payload.size, 0);
+ if (ret < 0) {
+ ERR("Failed to send \"rotate stream\" command");
+ goto error;
+ }
+
+ /* Receive response. */
+ ret = recv_reply(sock, &reply, sizeof(reply));
+ if (ret < 0) {
+ ERR("Failed to receive \"rotate streams\" command reply");
+ goto error;
+ }
+
+ reply.ret_code = be32toh(reply.ret_code);
+ if (reply.ret_code != LTTNG_OK) {
+ ret = -1;
+ ERR("Relayd rotate streams replied error %d", reply.ret_code);
+ } else {
+ /* Success. */
+ ret = 0;
+ DBG("Relayd rotated streams successfully");
+ }
+
+error:
+ lttng_dynamic_buffer_reset(&payload);
+ return ret;
+}
+
+int relayd_create_trace_chunk(struct lttcomm_relayd_sock *sock,
+ struct lttng_trace_chunk *chunk)
+{
+ int ret = 0;
+ enum lttng_trace_chunk_status status;
+ struct lttcomm_relayd_create_trace_chunk msg = {};
+ struct lttcomm_relayd_generic_reply reply = {};
+ struct lttng_dynamic_buffer payload;
+ uint64_t chunk_id;
+ time_t creation_timestamp;
+ const char *chunk_name;
+ size_t chunk_name_length;
+ bool overridden_name;
+
+ lttng_dynamic_buffer_init(&payload);
+
+ if (!relayd_supports_chunks(sock)) {
+ DBG("Refusing to create remote trace chunk: relayd does not support chunks");
+ goto end;
+ }
+
+ status = lttng_trace_chunk_get_id(chunk, &chunk_id);
+ if (status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+ ret = -1;
+ goto end;
+ }
+
+ status = lttng_trace_chunk_get_creation_timestamp(
+ chunk, &creation_timestamp);
+ if (status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+ ret = -1;
+ goto end;
+ }
+
+ status = lttng_trace_chunk_get_name(
+ chunk, &chunk_name, &overridden_name);
+ if (status != LTTNG_TRACE_CHUNK_STATUS_OK &&
+ status != LTTNG_TRACE_CHUNK_STATUS_NONE) {
+ ret = -1;
+ goto end;
+ }
+
+ chunk_name_length = overridden_name ? (strlen(chunk_name) + 1) : 0;
+ msg = (typeof(msg)){
+ .chunk_id = htobe64(chunk_id),
+ .creation_timestamp = htobe64((uint64_t) creation_timestamp),
+ .override_name_length = htobe32((uint32_t) chunk_name_length),
+ };
+
+ ret = lttng_dynamic_buffer_append(&payload, &msg, sizeof(msg));
+ if (ret) {
+ goto end;
+ }
+ if (chunk_name_length) {
+ ret = lttng_dynamic_buffer_append(
+ &payload, chunk_name, chunk_name_length);
+ if (ret) {
+ goto end;
+ }
+ }
+
+ ret = send_command(sock, RELAYD_CREATE_TRACE_CHUNK, payload.data,
+ payload.size, 0);
+ if (ret < 0) {
+ ERR("Failed to send trace chunk creation command to relay daemon");
+ goto end;
+ }
+
+ ret = recv_reply(sock, &reply, sizeof(reply));
+ if (ret < 0) {
+ ERR("Failed to receive relay daemon trace chunk creation command reply");
+ goto end;
+ }
+
+ reply.ret_code = be32toh(reply.ret_code);
+ if (reply.ret_code != LTTNG_OK) {
+ ret = -1;
+ ERR("Relayd trace chunk create replied error %d",
+ reply.ret_code);
+ } else {
+ ret = 0;
+ DBG("Relayd successfully created trace chunk: chunk_id = %" PRIu64,
+ chunk_id);
+ }
+
+end:
+ lttng_dynamic_buffer_reset(&payload);
+ return ret;
+}
+
+int relayd_close_trace_chunk(struct lttcomm_relayd_sock *sock,
+ struct lttng_trace_chunk *chunk)
+{
+ int ret = 0;
+ enum lttng_trace_chunk_status status;
+ struct lttcomm_relayd_close_trace_chunk msg = {};
+ struct lttcomm_relayd_generic_reply reply = {};
+ uint64_t chunk_id;
+ time_t close_timestamp;
+ LTTNG_OPTIONAL(enum lttng_trace_chunk_command_type) close_command = {};
+
+ if (!relayd_supports_chunks(sock)) {
+ DBG("Refusing to close remote trace chunk: relayd does not support chunks");
+ goto end;
+ }
+
+ status = lttng_trace_chunk_get_id(chunk, &chunk_id);
+ if (status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+ ERR("Failed to get trace chunk id");
+ ret = -1;
+ goto end;
+ }
+
+ status = lttng_trace_chunk_get_close_timestamp(chunk, &close_timestamp);
+ if (status != LTTNG_TRACE_CHUNK_STATUS_OK) {
+ ERR("Failed to get trace chunk close timestamp");
+ ret = -1;
+ goto end;
+ }
+
+ status = lttng_trace_chunk_get_close_command(chunk,
+ &close_command.value);
+ switch (status) {
+ case LTTNG_TRACE_CHUNK_STATUS_OK:
+ close_command.is_set = 1;
+ break;
+ case LTTNG_TRACE_CHUNK_STATUS_NONE:
+ break;
+ default:
+ ERR("Failed to get trace chunk close command");
+ ret = -1;
+ goto end;
+ }
+
+ msg = (typeof(msg)){
+ .chunk_id = htobe64(chunk_id),
+ .close_timestamp = htobe64((uint64_t) close_timestamp),
+ .close_command = {
+ .value = htobe32((uint32_t) close_command.value),
+ .is_set = close_command.is_set,
+ },
+ };
+
+ ret = send_command(sock, RELAYD_CLOSE_TRACE_CHUNK, &msg, sizeof(msg),
+ 0);
+ if (ret < 0) {
+ ERR("Failed to send trace chunk close command to relay daemon");
+ goto end;
+ }
+
+ ret = recv_reply(sock, &reply, sizeof(reply));
+ if (ret < 0) {
+ ERR("Failed to receive relay daemon trace chunk close command reply");
+ goto end;
+ }
+
+ reply.ret_code = be32toh(reply.ret_code);
+ if (reply.ret_code != LTTNG_OK) {
+ ret = -1;
+ ERR("Relayd trace chunk close replied error %d",
+ reply.ret_code);
+ } else {
+ ret = 0;
+ DBG("Relayd successfully closed trace chunk: chunk_id = %" PRIu64,
+ chunk_id);
+ }
+end:
+ return ret;
+}
+
+int relayd_trace_chunk_exists(struct lttcomm_relayd_sock *sock,
+ uint64_t chunk_id, bool *chunk_exists)
+{
+ int ret = 0;
+ struct lttcomm_relayd_trace_chunk_exists msg = {};
+ struct lttcomm_relayd_trace_chunk_exists_reply reply = {};
+
+ if (!relayd_supports_chunks(sock)) {
+ DBG("Refusing to check for trace chunk existence: relayd does not support chunks");
+ goto end;
+ }
+
+ msg = (typeof(msg)){
+ .chunk_id = htobe64(chunk_id),
+ };
+
+ ret = send_command(sock, RELAYD_TRACE_CHUNK_EXISTS, &msg, sizeof(msg),
+ 0);
+ if (ret < 0) {
+ ERR("Failed to send trace chunk exists command to relay daemon");
+ goto end;
+ }
+
+ ret = recv_reply(sock, &reply, sizeof(reply));
+ if (ret < 0) {
+ ERR("Failed to receive relay daemon trace chunk close command reply");
+ goto end;
+ }
+
+ reply.generic.ret_code = be32toh(reply.generic.ret_code);
+ if (reply.generic.ret_code != LTTNG_OK) {
+ ret = -1;
+ ERR("Relayd trace chunk close replied error %d",
+ reply.generic.ret_code);
+ } else {
+ ret = 0;
+ DBG("Relayd successfully checked trace chunk existence: chunk_id = %" PRIu64
+ ", exists = %s", chunk_id,
+ reply.trace_chunk_exists ? "true" : "false");
+ *chunk_exists = !!reply.trace_chunk_exists;
+ }
+end:
+ return ret;
+}