Implement PID tracking for kernel tracing
[lttng-tools.git] / src / bin / lttng-relayd / lttng-relayd.h
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1/*
2 * Copyright (C) 2012 - Julien Desfossez <jdesfossez@efficios.com>
3 * David Goulet <dgoulet@efficios.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License, version 2 only,
7 * as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 */
18
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19#ifndef LTTNG_RELAYD_H
20#define LTTNG_RELAYD_H
b8aa1682 21
d3e2ba59 22#include <limits.h>
b8aa1682 23#include <urcu.h>
8bdee6e2 24#include <urcu/wfcqueue.h>
d3e2ba59 25
0f907de1 26#include <common/hashtable/hashtable.h>
d3e2ba59 27
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28/*
29 * Queue used to enqueue relay requests
30 */
58eb9381 31struct relay_conn_queue {
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32 struct cds_wfcq_head head;
33 struct cds_wfcq_tail tail;
7717e361 34 int32_t futex;
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35};
36
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37struct relay_local_data {
38 struct lttng_ht *sessions_ht;
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39};
40
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41extern char *opt_output_path;
42
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43/*
44 * Contains stream indexed by ID. This is important since many commands lookup
45 * streams only by ID thus also keeping them in this hash table makes the
46 * search O(1) instead of iterating over the ctf_traces_ht of the session.
47 */
d3e2ba59 48extern struct lttng_ht *relay_streams_ht;
2a174661 49
92c6ca54 50extern struct lttng_ht *viewer_streams_ht;
0a6518b0 51extern struct lttng_ht *indexes_ht;
d3e2ba59 52
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53extern const char *tracing_group_name;
54
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55extern const char * const config_section_name;
56
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57extern int thread_quit_pipe[2];
58
3fd27398 59void lttng_relay_notify_ready(void);
b4aacfdc 60int lttng_relay_stop_threads(void);
d3e2ba59 61
7717e361 62#endif /* LTTNG_RELAYD_H */
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