Initial import of the new binary lttng-relayd
[lttng-tools.git] / src / bin / lttng-relayd / lttng-relayd.h
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
19 #ifndef _LTT_RELAYD_H
20 #define _LTT_RELAYD_H
21
22 #define _LGPL_SOURCE
23 #include <urcu.h>
24 #include <urcu/wfqueue.h>
25
26 /*
27 * Queue used to enqueue relay requests
28 */
29 struct relay_cmd_queue {
30 int32_t futex;
31 struct cds_wfq_queue queue;
32 };
33
34 enum connection_type {
35 RELAY_DATA,
36 RELAY_CONTROL,
37 };
38
39 /*
40 * Represents a session for the relay point of view
41 */
42 struct relay_session {
43 uint64_t id;
44 struct lttcomm_sock *sock;
45 unsigned int version_check_done:1;
46 };
47
48 /*
49 * Represents a stream in the relay
50 */
51 struct relay_stream {
52 uint64_t stream_handle;
53 struct lttng_ht_node_ulong stream_n;
54 int fd;
55 uint64_t seq;
56 struct relay_session *session;
57 };
58
59 /*
60 * Internal structure to map a socket with the corresponding session.
61 * A hashtable indexed on the socket FD is used for the lookups.
62 */
63 struct relay_command {
64 struct lttcomm_sock *sock;
65 struct cds_wfq_node node;
66 struct lttng_ht_node_ulong sock_n;
67 enum connection_type type;
68 struct relay_session *session;
69 };
70
71 #endif
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