+
+/*
+ * Check for data availability for a given stream id.
+ *
+ * Return 0 if NOT pending, 1 if so and a negative value on error.
+ */
+int relayd_data_pending(struct lttcomm_relayd_sock *rsock, uint64_t stream_id,
+ uint64_t last_net_seq_num)
+{
+ int ret;
+ struct lttcomm_relayd_data_pending msg;
+ struct lttcomm_relayd_generic_reply reply;
+
+ /* Code flow error. Safety net. */
+ assert(rsock);
+
+ DBG("Relayd data pending for stream id %" PRIu64, stream_id);
+
+ memset(&msg, 0, sizeof(msg));
+ msg.stream_id = htobe64(stream_id);
+ msg.last_net_seq_num = htobe64(last_net_seq_num);
+
+ /* Send command */
+ ret = send_command(rsock, RELAYD_DATA_PENDING, (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) {
+ ERR("Relayd data pending replied error %d", reply.ret_code);
+ }
+
+ /* At this point, the ret code is either 1 or 0 */
+ ret = reply.ret_code;
+
+ DBG("Relayd data is %s pending for stream id %" PRIu64,
+ ret == 1 ? "" : "NOT", stream_id);
+
+error:
+ return ret;
+}
+
+/*
+ * Check on the relayd side for a quiescent state on the control socket.
+ */
+int relayd_quiescent_control(struct lttcomm_relayd_sock *rsock,
+ uint64_t metadata_stream_id)
+{
+ int ret;
+ struct lttcomm_relayd_quiescent_control msg;
+ struct lttcomm_relayd_generic_reply reply;
+
+ /* Code flow error. Safety net. */
+ assert(rsock);
+
+ DBG("Relayd checking quiescent control state");
+
+ memset(&msg, 0, sizeof(msg));
+ msg.stream_id = htobe64(metadata_stream_id);
+
+ /* Send command */
+ ret = send_command(rsock, RELAYD_QUIESCENT_CONTROL, &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 quiescent control replied error %d", reply.ret_code);
+ goto error;
+ }
+
+ /* Control socket is quiescent */
+ return 0;
+
+error:
+ return ret;
+}
+
+/*
+ * Begin a data pending command for a specific session id.
+ */
+int relayd_begin_data_pending(struct lttcomm_relayd_sock *rsock, uint64_t id)
+{
+ int ret;
+ struct lttcomm_relayd_begin_data_pending msg;
+ struct lttcomm_relayd_generic_reply reply;
+
+ /* Code flow error. Safety net. */
+ assert(rsock);
+
+ DBG("Relayd begin data pending");
+
+ memset(&msg, 0, sizeof(msg));
+ msg.session_id = htobe64(id);
+
+ /* Send command */
+ ret = send_command(rsock, RELAYD_BEGIN_DATA_PENDING, &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 begin data pending replied error %d", reply.ret_code);
+ goto error;
+ }
+
+ return 0;
+
+error:
+ return ret;
+}
+
+/*
+ * End a data pending command for a specific session id.
+ *
+ * Return 0 on success and set is_data_inflight to 0 if no data is being
+ * streamed or 1 if it is the case.
+ */
+int relayd_end_data_pending(struct lttcomm_relayd_sock *rsock, uint64_t id,
+ unsigned int *is_data_inflight)
+{
+ int ret, recv_ret;
+ struct lttcomm_relayd_end_data_pending msg;
+ struct lttcomm_relayd_generic_reply reply;
+
+ /* Code flow error. Safety net. */
+ assert(rsock);
+
+ DBG("Relayd end data pending");
+
+ memset(&msg, 0, sizeof(msg));
+ msg.session_id = htobe64(id);
+
+ /* Send command */
+ ret = send_command(rsock, RELAYD_END_DATA_PENDING, &msg, sizeof(msg), 0);
+ if (ret < 0) {
+ goto error;
+ }
+
+ /* Receive response */
+ ret = recv_reply(rsock, (void *) &reply, sizeof(reply));
+ if (ret < 0) {
+ goto error;
+ }
+
+ recv_ret = be32toh(reply.ret_code);
+ if (recv_ret < 0) {
+ ret = recv_ret;
+ goto error;
+ }
+
+ *is_data_inflight = recv_ret;
+
+ DBG("Relayd end data pending is data inflight: %d", recv_ret);
+
+ return 0;
+
+error:
+ return ret;
+}
+
+/*
+ * Send index to the relayd.
+ */
+int relayd_send_index(struct lttcomm_relayd_sock *rsock,
+ struct ctf_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);
+
+ memset(&msg, 0, sizeof(msg));
+ 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;
+
+ if (rsock->minor >= 8) {
+ msg.stream_instance_id = index->stream_instance_id;
+ msg.packet_seq_num = index->packet_seq_num;
+ }
+
+ /* Send command */
+ ret = send_command(rsock, RELAYD_SEND_INDEX, &msg,
+ lttcomm_relayd_index_len(lttng_to_index_major(rsock->major,
+ rsock->minor),
+ lttng_to_index_minor(rsock->major, rsock->minor)),
+ 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;
+}
+
+/*
+ * 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;
+}
+
+int relayd_rotate_stream(struct lttcomm_relayd_sock *rsock, uint64_t stream_id,
+ const char *new_pathname, uint64_t new_chunk_id,
+ uint64_t seq_num)
+{
+ int ret;
+ struct lttcomm_relayd_rotate_stream *msg = NULL;
+ struct lttcomm_relayd_generic_reply reply;
+ size_t len;
+ int msg_len;
+
+ /* Code flow error. Safety net. */
+ assert(rsock);
+
+ DBG("Sending rotate stream id %" PRIu64 " command to relayd", stream_id);
+
+ /* Account for the trailing NULL. */
+ len = strnlen(new_pathname, LTTNG_PATH_MAX) + 1;
+ if (len > LTTNG_PATH_MAX) {
+ ERR("Path used in relayd rotate stream command exceeds the maximal allowed length");
+ ret = -1;
+ goto error;
+ }
+
+ msg_len = offsetof(struct lttcomm_relayd_rotate_stream, new_pathname) + len;
+ msg = zmalloc(msg_len);
+ if (!msg) {
+ PERROR("Failed to allocate relayd rotate stream command of %d bytes",
+ msg_len);
+ ret = -1;
+ goto error;
+ }
+
+ if (lttng_strncpy(msg->new_pathname, new_pathname, len)) {
+ ret = -1;
+ ERR("Failed to copy relayd rotate stream command's new path name");
+ goto error;
+ }
+
+ msg->pathname_length = htobe32(len);
+ msg->stream_id = htobe64(stream_id);
+ msg->new_chunk_id = htobe64(new_chunk_id);
+ /*
+ * The seq_num is invalid for metadata streams, but it is ignored on
+ * the relay.
+ */
+ msg->rotate_at_seq_num = htobe64(seq_num);
+
+ /* Send command. */
+ ret = send_command(rsock, RELAYD_ROTATE_STREAM, (void *) msg, msg_len, 0);
+ if (ret < 0) {
+ ERR("Send rotate command");
+ goto error;
+ }
+
+ /* Receive response. */
+ ret = recv_reply(rsock, (void *) &reply, sizeof(reply));
+ if (ret < 0) {
+ ERR("Receive rotate reply");
+ 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 rotate stream replied error %d", reply.ret_code);
+ } else {
+ /* Success. */
+ ret = 0;
+ DBG("Relayd rotated stream id %" PRIu64 " successfully", stream_id);
+ }
+
+error:
+ free(msg);
+ return ret;
+}
+
+int relayd_rotate_rename(struct lttcomm_relayd_sock *rsock,
+ const char *old_path, const char *new_path)
+{
+ int ret;
+ struct lttcomm_relayd_rotate_rename *msg = NULL;
+ struct lttcomm_relayd_generic_reply reply;
+ size_t old_path_length, new_path_length;
+ size_t msg_length;
+
+ /* Code flow error. Safety net. */
+ assert(rsock);
+
+ DBG("Relayd rename chunk %s to %s", old_path, new_path);
+
+ /* The two paths are sent with a '\0' delimiter between them. */
+ old_path_length = strlen(old_path) + 1;
+ new_path_length = strlen(new_path) + 1;
+
+ msg_length = sizeof(*msg) + old_path_length + new_path_length;
+ msg = zmalloc(msg_length);
+ if (!msg) {
+ PERROR("zmalloc rotate-rename command message");
+ ret = -1;
+ goto error;
+ }
+
+ assert(old_path_length <= UINT32_MAX);
+ msg->old_path_length = htobe32(old_path_length);
+
+ assert(new_path_length <= UINT32_MAX);
+ msg->new_path_length = htobe32(new_path_length);
+
+ strcpy(msg->paths, old_path);
+ strcpy(msg->paths + old_path_length, new_path);
+
+ /* Send command */
+ ret = send_command(rsock, RELAYD_ROTATE_RENAME, (const void *) msg,
+ msg_length, 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 rotate rename replied error %d", reply.ret_code);
+ } else {
+ /* Success */
+ ret = 0;
+ }
+
+ DBG("Relayd rotate rename completed successfully");
+
+error:
+ free(msg);
+ return ret;
+}
+
+int relayd_rotate_pending(struct lttcomm_relayd_sock *rsock, uint64_t chunk_id)
+{
+ int ret;
+ struct lttcomm_relayd_rotate_pending msg;
+ struct lttcomm_relayd_rotate_pending_reply reply;
+
+ /* Code flow error. Safety net. */
+ assert(rsock);
+
+ DBG("Querying relayd for rotate pending with chunk_id %" PRIu64,
+ chunk_id);
+
+ memset(&msg, 0, sizeof(msg));
+ msg.chunk_id = htobe64(chunk_id);
+
+ /* Send command */
+ ret = send_command(rsock, RELAYD_ROTATE_PENDING, (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.generic.ret_code = be32toh(reply.generic.ret_code);
+
+ /* Return session id or negative ret code. */
+ if (reply.generic.ret_code != LTTNG_OK) {
+ ret = -reply.generic.ret_code;
+ ERR("Relayd rotate pending replied with error %d", ret);
+ goto error;
+ } else {
+ /* No error, just rotate pending state */
+ if (reply.is_pending == 0 || reply.is_pending == 1) {
+ ret = reply.is_pending;
+ DBG("Relayd rotate pending command completed successfully with result \"%s\"",
+ ret ? "rotation pending" : "rotation NOT pending");
+ } else {
+ ret = -LTTNG_ERR_UNK;
+ }
+ }
+
+error:
+ return ret;
+}
+
+int relayd_mkdir(struct lttcomm_relayd_sock *rsock, const char *path)
+{
+ int ret;
+ struct lttcomm_relayd_mkdir *msg;
+ struct lttcomm_relayd_generic_reply reply;
+ size_t len;
+
+ /* Code flow error. Safety net. */
+ assert(rsock);
+
+ DBG("Relayd mkdir path %s", path);
+
+ len = strlen(path) + 1;
+ msg = zmalloc(sizeof(msg->length) + len);
+ if (!msg) {
+ PERROR("Alloc mkdir msg");
+ ret = -1;
+ goto error;
+ }
+ msg->length = htobe32((uint32_t) len);
+
+ if (lttng_strncpy(msg->path, path, len)) {
+ ret = -1;
+ goto error;
+ }
+
+ /* Send command */
+ ret = send_command(rsock, RELAYD_MKDIR, (void *) msg,
+ sizeof(msg->length) + len, 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 mkdir replied error %d", reply.ret_code);
+ } else {
+ /* Success */
+ ret = 0;
+ }
+
+ DBG("Relayd mkdir completed successfully");
+
+error:
+ free(msg);
+ return ret;
+}