+ output = zmalloc(sizeof(struct consumer_output));
+ if (output == NULL) {
+ PERROR("zmalloc consumer_output");
+ goto error;
+ }
+
+ /* By default, consumer output is enabled */
+ output->enabled = 1;
+ output->type = type;
+ output->net_seq_index = (uint64_t) -1ULL;
+ urcu_ref_init(&output->ref);
+
+ output->socks = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG);
+
+error:
+ return output;
+}
+
+/*
+ * Iterate over the consumer output socket hash table and destroy them. The
+ * socket file descriptor are only closed if the consumer output was
+ * registered meaning it's an external consumer.
+ */
+void consumer_destroy_output_sockets(struct consumer_output *obj)
+{
+ struct lttng_ht_iter iter;
+ struct consumer_socket *socket;
+
+ if (!obj->socks) {
+ return;
+ }
+
+ rcu_read_lock();
+ cds_lfht_for_each_entry(obj->socks->ht, &iter.iter, socket, node.node) {
+ consumer_del_socket(socket, obj);
+ consumer_destroy_socket(socket);
+ }
+ rcu_read_unlock();
+}
+
+/*
+ * Delete the consumer_output object from the list and free the ptr.
+ *
+ * Should *NOT* be called with RCU read-side lock held.
+ */
+static void consumer_release_output(struct urcu_ref *ref)
+{
+ struct consumer_output *obj =
+ caa_container_of(ref, struct consumer_output, ref);
+
+ consumer_destroy_output_sockets(obj);
+
+ if (obj->socks) {
+ /* Finally destroy HT */
+ ht_cleanup_push(obj->socks);
+ }
+
+ free(obj);
+}
+
+/*
+ * Get the consumer_output object.
+ */
+void consumer_output_get(struct consumer_output *obj)
+{
+ urcu_ref_get(&obj->ref);
+}
+
+/*
+ * Put the consumer_output object.
+ *
+ * Should *NOT* be called with RCU read-side lock held.
+ */
+void consumer_output_put(struct consumer_output *obj)
+{
+ if (!obj) {
+ return;
+ }
+ urcu_ref_put(&obj->ref, consumer_release_output);
+}
+
+/*
+ * Copy consumer output and returned the newly allocated copy.
+ *
+ * Should *NOT* be called with RCU read-side lock held.
+ */
+struct consumer_output *consumer_copy_output(struct consumer_output *obj)
+{
+ int ret;
+ struct consumer_output *output;
+
+ assert(obj);
+
+ output = consumer_create_output(obj->type);
+ if (output == NULL) {
+ goto end;
+ }
+ output->enabled = obj->enabled;
+ output->net_seq_index = obj->net_seq_index;
+ memcpy(output->subdir, obj->subdir, PATH_MAX);
+ output->snapshot = obj->snapshot;
+ output->relay_major_version = obj->relay_major_version;
+ output->relay_minor_version = obj->relay_minor_version;
+ memcpy(&output->dst, &obj->dst, sizeof(output->dst));
+ ret = consumer_copy_sockets(output, obj);
+ if (ret < 0) {
+ goto error_put;
+ }
+end:
+ return output;
+
+error_put:
+ consumer_output_put(output);
+ return NULL;
+}
+
+/*
+ * Copy consumer sockets from src to dst.
+ *
+ * Return 0 on success or else a negative value.
+ */
+int consumer_copy_sockets(struct consumer_output *dst,
+ struct consumer_output *src)
+{
+ int ret = 0;
+ struct lttng_ht_iter iter;
+ struct consumer_socket *socket, *copy_sock;
+
+ assert(dst);
+ assert(src);
+
+ rcu_read_lock();
+ cds_lfht_for_each_entry(src->socks->ht, &iter.iter, socket, node.node) {
+ /* Ignore socket that are already there. */
+ copy_sock = consumer_find_socket(*socket->fd_ptr, dst);
+ if (copy_sock) {
+ continue;
+ }
+
+ /* Create new socket object. */
+ copy_sock = consumer_allocate_socket(socket->fd_ptr);
+ if (copy_sock == NULL) {
+ rcu_read_unlock();
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ copy_sock->registered = socket->registered;
+ /*
+ * This is valid because this lock is shared accross all consumer
+ * object being the global lock of the consumer data structure of the
+ * session daemon.
+ */
+ copy_sock->lock = socket->lock;
+ consumer_add_socket(copy_sock, dst);
+ }
+ rcu_read_unlock();
+
+error:
+ return ret;
+}
+
+/*
+ * Set network URI to the consumer output object.
+ *
+ * Return 0 on success. Return 1 if the URI were equal. Else, negative value on
+ * error.
+ */
+int consumer_set_network_uri(struct consumer_output *obj,
+ struct lttng_uri *uri)
+{
+ int ret;
+ char tmp_path[PATH_MAX];
+ char hostname[HOST_NAME_MAX];
+ struct lttng_uri *dst_uri = NULL;
+
+ /* Code flow error safety net. */
+ assert(obj);
+ assert(uri);
+
+ switch (uri->stype) {
+ case LTTNG_STREAM_CONTROL:
+ dst_uri = &obj->dst.net.control;
+ obj->dst.net.control_isset = 1;
+ if (uri->port == 0) {
+ /* Assign default port. */
+ uri->port = DEFAULT_NETWORK_CONTROL_PORT;
+ } else {
+ if (obj->dst.net.data_isset && uri->port ==
+ obj->dst.net.data.port) {
+ ret = -LTTNG_ERR_INVALID;
+ goto error;
+ }
+ }
+ DBG3("Consumer control URI set with port %d", uri->port);
+ break;
+ case LTTNG_STREAM_DATA:
+ dst_uri = &obj->dst.net.data;
+ obj->dst.net.data_isset = 1;
+ if (uri->port == 0) {
+ /* Assign default port. */
+ uri->port = DEFAULT_NETWORK_DATA_PORT;
+ } else {
+ if (obj->dst.net.control_isset && uri->port ==
+ obj->dst.net.control.port) {
+ ret = -LTTNG_ERR_INVALID;
+ goto error;
+ }
+ }
+ DBG3("Consumer data URI set with port %d", uri->port);
+ break;
+ default:
+ ERR("Set network uri type unknown %d", uri->stype);
+ ret = -LTTNG_ERR_INVALID;
+ goto error;
+ }
+
+ ret = uri_compare(dst_uri, uri);
+ if (!ret) {
+ /* Same URI, don't touch it and return success. */
+ DBG3("URI network compare are the same");
+ goto equal;
+ }
+
+ /* URIs were not equal, replacing it. */
+ memset(dst_uri, 0, sizeof(struct lttng_uri));
+ memcpy(dst_uri, uri, sizeof(struct lttng_uri));
+ obj->type = CONSUMER_DST_NET;
+
+ /* Handle subdir and add hostname in front. */
+ if (dst_uri->stype == LTTNG_STREAM_CONTROL) {
+ /* Get hostname to append it in the pathname */
+ ret = gethostname(hostname, sizeof(hostname));
+ if (ret < 0) {
+ PERROR("gethostname. Fallback on default localhost");
+ strncpy(hostname, "localhost", sizeof(hostname));
+ }
+ hostname[sizeof(hostname) - 1] = '\0';
+
+ /* Setup consumer subdir if none present in the control URI */
+ if (strlen(dst_uri->subdir) == 0) {
+ ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s",
+ hostname, obj->subdir);
+ } else {
+ ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s",
+ hostname, dst_uri->subdir);
+ }
+ if (ret < 0) {
+ PERROR("snprintf set consumer uri subdir");
+ ret = -LTTNG_ERR_NOMEM;
+ goto error;
+ }
+
+ strncpy(obj->subdir, tmp_path, sizeof(obj->subdir));
+ DBG3("Consumer set network uri subdir path %s", tmp_path);
+ }
+
+ return 0;
+equal:
+ return 1;
+error:
+ return ret;
+}
+
+/*
+ * Send file descriptor to consumer via sock.
+ */
+int consumer_send_fds(struct consumer_socket *sock, int *fds, size_t nb_fd)
+{
+ int ret;
+
+ assert(fds);
+ assert(sock);
+ assert(nb_fd > 0);
+
+ ret = lttcomm_send_fds_unix_sock(*sock->fd_ptr, fds, nb_fd);
+ if (ret < 0) {
+ /* The above call will print a PERROR on error. */
+ DBG("Error when sending consumer fds on sock %d", *sock->fd_ptr);
+ goto error;
+ }
+
+ ret = consumer_recv_status_reply(sock);
+
+error:
+ return ret;
+}
+
+/*
+ * Consumer send communication message structure to consumer.
+ */
+int consumer_send_msg(struct consumer_socket *sock,
+ struct lttcomm_consumer_msg *msg)
+{
+ int ret;
+
+ assert(msg);
+ assert(sock);
+
+ ret = consumer_socket_send(sock, msg, sizeof(struct lttcomm_consumer_msg));
+ if (ret < 0) {
+ goto error;
+ }
+
+ ret = consumer_recv_status_reply(sock);
+
+error:
+ return ret;
+}
+
+/*
+ * Consumer send channel communication message structure to consumer.
+ */
+int consumer_send_channel(struct consumer_socket *sock,
+ struct lttcomm_consumer_msg *msg)
+{
+ int ret;
+
+ assert(msg);
+ assert(sock);
+
+ ret = consumer_send_msg(sock, msg);
+ if (ret < 0) {
+ goto error;
+ }
+
+error:
+ return ret;
+}
+
+/*
+ * Populate the given consumer msg structure with the ask_channel command
+ * information.
+ */
+void consumer_init_ask_channel_comm_msg(struct lttcomm_consumer_msg *msg,
+ uint64_t subbuf_size,
+ uint64_t num_subbuf,
+ int overwrite,
+ unsigned int switch_timer_interval,
+ unsigned int read_timer_interval,
+ unsigned int live_timer_interval,
+ int output,
+ int type,
+ uint64_t session_id,
+ const char *pathname,
+ const char *name,
+ uid_t uid,
+ gid_t gid,
+ uint64_t relayd_id,
+ uint64_t key,
+ unsigned char *uuid,
+ uint32_t chan_id,
+ uint64_t tracefile_size,
+ uint64_t tracefile_count,
+ uint64_t session_id_per_pid,
+ unsigned int monitor,
+ uint32_t ust_app_uid,
+ const char *root_shm_path,
+ const char *shm_path)
+{
+ assert(msg);
+
+ /* Zeroed structure */
+ memset(msg, 0, sizeof(struct lttcomm_consumer_msg));
+
+ msg->cmd_type = LTTNG_CONSUMER_ASK_CHANNEL_CREATION;
+ msg->u.ask_channel.subbuf_size = subbuf_size;
+ msg->u.ask_channel.num_subbuf = num_subbuf ;
+ msg->u.ask_channel.overwrite = overwrite;
+ msg->u.ask_channel.switch_timer_interval = switch_timer_interval;
+ msg->u.ask_channel.read_timer_interval = read_timer_interval;
+ msg->u.ask_channel.live_timer_interval = live_timer_interval;
+ msg->u.ask_channel.output = output;
+ msg->u.ask_channel.type = type;
+ msg->u.ask_channel.session_id = session_id;
+ msg->u.ask_channel.session_id_per_pid = session_id_per_pid;
+ msg->u.ask_channel.uid = uid;
+ msg->u.ask_channel.gid = gid;
+ msg->u.ask_channel.relayd_id = relayd_id;
+ msg->u.ask_channel.key = key;
+ msg->u.ask_channel.chan_id = chan_id;
+ msg->u.ask_channel.tracefile_size = tracefile_size;
+ msg->u.ask_channel.tracefile_count = tracefile_count;
+ msg->u.ask_channel.monitor = monitor;
+ msg->u.ask_channel.ust_app_uid = ust_app_uid;
+
+ memcpy(msg->u.ask_channel.uuid, uuid, sizeof(msg->u.ask_channel.uuid));
+
+ if (pathname) {
+ strncpy(msg->u.ask_channel.pathname, pathname,
+ sizeof(msg->u.ask_channel.pathname));
+ msg->u.ask_channel.pathname[sizeof(msg->u.ask_channel.pathname)-1] = '\0';
+ }
+
+ strncpy(msg->u.ask_channel.name, name, sizeof(msg->u.ask_channel.name));
+ msg->u.ask_channel.name[sizeof(msg->u.ask_channel.name) - 1] = '\0';
+
+ if (root_shm_path) {
+ strncpy(msg->u.ask_channel.root_shm_path, root_shm_path,
+ sizeof(msg->u.ask_channel.root_shm_path));
+ msg->u.ask_channel.root_shm_path[sizeof(msg->u.ask_channel.root_shm_path) - 1] = '\0';
+ }
+ if (shm_path) {
+ strncpy(msg->u.ask_channel.shm_path, shm_path,
+ sizeof(msg->u.ask_channel.shm_path));
+ msg->u.ask_channel.shm_path[sizeof(msg->u.ask_channel.shm_path) - 1] = '\0';
+ }
+}
+
+/*
+ * Init channel communication message structure.
+ */
+void consumer_init_channel_comm_msg(struct lttcomm_consumer_msg *msg,
+ enum lttng_consumer_command cmd,
+ uint64_t channel_key,
+ uint64_t session_id,
+ const char *pathname,
+ uid_t uid,
+ gid_t gid,
+ uint64_t relayd_id,
+ const char *name,
+ unsigned int nb_init_streams,
+ enum lttng_event_output output,
+ int type,
+ uint64_t tracefile_size,
+ uint64_t tracefile_count,
+ unsigned int monitor,
+ unsigned int live_timer_interval)
+{
+ assert(msg);
+
+ /* Zeroed structure */
+ memset(msg, 0, sizeof(struct lttcomm_consumer_msg));
+
+ /* Send channel */
+ msg->cmd_type = cmd;
+ msg->u.channel.channel_key = channel_key;
+ msg->u.channel.session_id = session_id;
+ msg->u.channel.uid = uid;
+ msg->u.channel.gid = gid;
+ msg->u.channel.relayd_id = relayd_id;
+ msg->u.channel.nb_init_streams = nb_init_streams;
+ msg->u.channel.output = output;
+ msg->u.channel.type = type;
+ msg->u.channel.tracefile_size = tracefile_size;
+ msg->u.channel.tracefile_count = tracefile_count;
+ msg->u.channel.monitor = monitor;
+ msg->u.channel.live_timer_interval = live_timer_interval;
+
+ strncpy(msg->u.channel.pathname, pathname,
+ sizeof(msg->u.channel.pathname));
+ msg->u.channel.pathname[sizeof(msg->u.channel.pathname) - 1] = '\0';
+
+ strncpy(msg->u.channel.name, name, sizeof(msg->u.channel.name));
+ msg->u.channel.name[sizeof(msg->u.channel.name) - 1] = '\0';
+}
+
+/*
+ * Init stream communication message structure.
+ */
+void consumer_init_stream_comm_msg(struct lttcomm_consumer_msg *msg,
+ enum lttng_consumer_command cmd,
+ uint64_t channel_key,
+ uint64_t stream_key,
+ int cpu)
+{
+ assert(msg);
+
+ memset(msg, 0, sizeof(struct lttcomm_consumer_msg));
+
+ msg->cmd_type = cmd;
+ msg->u.stream.channel_key = channel_key;
+ msg->u.stream.stream_key = stream_key;
+ msg->u.stream.cpu = cpu;
+}
+
+void consumer_init_streams_sent_comm_msg(struct lttcomm_consumer_msg *msg,
+ enum lttng_consumer_command cmd,
+ uint64_t channel_key, uint64_t net_seq_idx)
+{
+ assert(msg);
+
+ memset(msg, 0, sizeof(struct lttcomm_consumer_msg));
+
+ msg->cmd_type = cmd;
+ msg->u.sent_streams.channel_key = channel_key;
+ msg->u.sent_streams.net_seq_idx = net_seq_idx;
+}
+
+/*
+ * Send stream communication structure to the consumer.
+ */
+int consumer_send_stream(struct consumer_socket *sock,
+ struct consumer_output *dst, struct lttcomm_consumer_msg *msg,
+ int *fds, size_t nb_fd)
+{
+ int ret;
+
+ assert(msg);
+ assert(dst);
+ assert(sock);
+ assert(fds);
+
+ ret = consumer_send_msg(sock, msg);
+ if (ret < 0) {
+ goto error;
+ }
+
+ ret = consumer_send_fds(sock, fds, nb_fd);
+ if (ret < 0) {
+ goto error;
+ }
+
+error:
+ return ret;
+}
+
+/*
+ * Send relayd socket to consumer associated with a session name.
+ *
+ * On success return positive value. On error, negative value.
+ */
+int consumer_send_relayd_socket(struct consumer_socket *consumer_sock,
+ struct lttcomm_relayd_sock *rsock, struct consumer_output *consumer,
+ enum lttng_stream_type type, uint64_t session_id,
+ char *session_name, char *hostname, int session_live_timer)
+{
+ int ret;
+ struct lttcomm_consumer_msg msg;
+
+ /* Code flow error. Safety net. */
+ assert(rsock);
+ assert(consumer);
+ assert(consumer_sock);
+
+ memset(&msg, 0, sizeof(msg));
+ /* Bail out if consumer is disabled */
+ if (!consumer->enabled) {
+ ret = LTTNG_OK;
+ goto error;
+ }
+
+ if (type == LTTNG_STREAM_CONTROL) {
+ ret = relayd_create_session(rsock,
+ &msg.u.relayd_sock.relayd_session_id,
+ session_name, hostname, session_live_timer,
+ consumer->snapshot);
+ if (ret < 0) {
+ /* Close the control socket. */
+ (void) relayd_close(rsock);
+ goto error;
+ }
+ }
+
+ msg.cmd_type = LTTNG_CONSUMER_ADD_RELAYD_SOCKET;
+ /*
+ * Assign network consumer output index using the temporary consumer since
+ * this call should only be made from within a set_consumer_uri() function
+ * call in the session daemon.
+ */
+ msg.u.relayd_sock.net_index = consumer->net_seq_index;
+ msg.u.relayd_sock.type = type;
+ msg.u.relayd_sock.session_id = session_id;
+ memcpy(&msg.u.relayd_sock.sock, rsock, sizeof(msg.u.relayd_sock.sock));
+
+ DBG3("Sending relayd sock info to consumer on %d", *consumer_sock->fd_ptr);
+ ret = consumer_send_msg(consumer_sock, &msg);
+ if (ret < 0) {