+#ifndef LTTNG_RELAYD_H
+#define LTTNG_RELAYD_H
+
/*
- * Copyright (C) 2012 - Julien Desfossez <jdesfossez@efficios.com>
- * David Goulet <dgoulet@efficios.com>
+ * Copyright (C) 2012 Julien Desfossez <jdesfossez@efficios.com>
+ * Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
+ * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2 only,
- * as published by the Free Software Foundation.
+ * SPDX-License-Identifier: GPL-2.0-only
*
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#ifndef LTTNG_RELAYD_H
-#define LTTNG_RELAYD_H
-
-#define _LGPL_SOURCE
+#include <limits.h>
#include <urcu.h>
-#include <urcu/wfqueue.h>
+#include <urcu/wfcqueue.h>
+
+#include <common/hashtable/hashtable.h>
+#include <common/fd-tracker/fd-tracker.h>
+
+struct sessiond_trace_chunk_registry;
/*
* Queue used to enqueue relay requests
*/
-struct relay_cmd_queue {
- struct cds_wfq_queue queue;
+struct relay_conn_queue {
+ struct cds_wfcq_head head;
+ struct cds_wfcq_tail tail;
int32_t futex;
};
-enum connection_type {
- RELAY_DATA,
- RELAY_CONTROL,
+enum relay_group_output_by {
+ RELAYD_GROUP_OUTPUT_BY_UNKNOWN,
+ RELAYD_GROUP_OUTPUT_BY_HOST,
+ RELAYD_GROUP_OUTPUT_BY_SESSION,
};
/*
- * Represents a session for the relay point of view
+ * Contains stream indexed by ID. This is important since many commands lookup
+ * streams only by ID thus also keeping them in this hash table makes the
+ * search O(1).
*/
-struct relay_session {
- /*
- * This session id is used to identify a set of stream to a tracing session
- * but also make sure we have a unique session id associated with a session
- * daemon which can provide multiple data source.
- */
- uint64_t id;
- struct lttcomm_sock *sock;
- /* protocol version to use for this session */
- uint32_t major;
- uint32_t minor;
-};
+extern struct lttng_ht *sessions_ht;
+extern struct lttng_ht *relay_streams_ht;
+extern struct lttng_ht *viewer_streams_ht;
+extern struct sessiond_trace_chunk_registry *sessiond_trace_chunk_registry;
-/*
- * Represents a stream in the relay
- */
-struct relay_stream {
- uint64_t stream_handle;
- uint64_t prev_seq; /* previous data sequence number encountered */
- struct lttng_ht_node_ulong stream_n;
- struct relay_session *session;
- struct rcu_head rcu_node;
- int fd;
+extern char *opt_output_path;
+extern const char *tracing_group_name;
+extern const char * const config_section_name;
+extern enum relay_group_output_by opt_group_output_by;
- /* Information telling us when to close the stream */
- unsigned int close_flag:1;
- uint64_t last_net_seq_num;
- /* Indicate if the stream was initialized for a data pending command. */
- unsigned int data_pending_check_done:1;
-};
+extern int thread_quit_pipe[2];
-/*
- * Internal structure to map a socket with the corresponding session.
- * A hashtable indexed on the socket FD is used for the lookups.
- */
-struct relay_command {
- struct lttcomm_sock *sock;
- struct relay_session *session;
- struct cds_wfq_node node;
- struct lttng_ht_node_ulong sock_n;
- struct rcu_head rcu_node;
- enum connection_type type;
- unsigned int version_check_done:1;
-};
+extern struct fd_tracker *the_fd_tracker;
+
+void lttng_relay_notify_ready(void);
+int lttng_relay_stop_threads(void);
#endif /* LTTNG_RELAYD_H */