748083ddfa65e145a6ebde0a98ea9575db35ce86
[lttng-tools.git] / src / bin / lttng-relayd / lttng-relayd.h
1 #ifndef LTTNG_RELAYD_H
2 #define LTTNG_RELAYD_H
3
4 /*
5 * Copyright (C) 2012 - Julien Desfossez <jdesfossez@efficios.com>
6 * David Goulet <dgoulet@efficios.com>
7 * 2015 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License, version 2 only,
11 * as published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 */
22
23 #include <limits.h>
24 #include <urcu.h>
25 #include <urcu/wfcqueue.h>
26
27 #include <common/hashtable/hashtable.h>
28
29 struct sessiond_trace_chunk_registry;
30
31 /*
32 * Queue used to enqueue relay requests
33 */
34 struct relay_conn_queue {
35 struct cds_wfcq_head head;
36 struct cds_wfcq_tail tail;
37 int32_t futex;
38 };
39
40 enum relay_group_output_by {
41 RELAYD_GROUP_OUTPUT_BY_UNKNOWN,
42 RELAYD_GROUP_OUTPUT_BY_HOST,
43 RELAYD_GROUP_OUTPUT_BY_SESSION,
44 };
45
46 /*
47 * Contains stream indexed by ID. This is important since many commands lookup
48 * streams only by ID thus also keeping them in this hash table makes the
49 * search O(1).
50 */
51 extern struct lttng_ht *sessions_ht;
52 extern struct lttng_ht *relay_streams_ht;
53 extern struct lttng_ht *viewer_streams_ht;
54 extern struct sessiond_trace_chunk_registry *sessiond_trace_chunk_registry;
55
56 extern char *opt_output_path;
57 extern const char *tracing_group_name;
58 extern const char * const config_section_name;
59 extern enum relay_group_output_by opt_group_output_by;
60
61 extern int thread_quit_pipe[2];
62
63 void lttng_relay_notify_ready(void);
64 int lttng_relay_stop_threads(void);
65
66 #endif /* LTTNG_RELAYD_H */
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