79e7fcb4383b1765a870a44c2c6576f5c6c7b92c
[lttng-tools.git] / src / bin / lttng-sessiond / lttng-sessiond.h
1 /*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; only version 2
7 * of the License.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18
19 #ifndef _LTT_SESSIOND_H
20 #define _LTT_SESSIOND_H
21
22 #define _LGPL_SOURCE
23 #include <urcu.h>
24 #include <urcu/wfqueue.h>
25
26 #include <common/sessiond-comm/sessiond-comm.h>
27 #include <common/compat/socket.h>
28
29 #include "session.h"
30 #include "ust-app.h"
31
32 const char *module_proc_lttng = "/proc/lttng";
33
34 extern const char default_home_dir[],
35 default_tracing_group[],
36 default_ust_sock_dir[],
37 default_global_apps_pipe[];
38
39 /*
40 * This contains extra data needed for processing a command received by the
41 * session daemon from the lttng client.
42 */
43 struct command_ctx {
44 int ust_sock;
45 unsigned int lttng_msg_size;
46 struct ltt_session *session;
47 struct lttcomm_lttng_msg *llm;
48 struct lttcomm_session_msg *lsm;
49 lttng_sock_cred creds;
50 };
51
52 struct ust_command {
53 int sock;
54 struct ust_register_msg reg_msg;
55 struct cds_wfq_node node;
56 };
57
58 /*
59 * Queue used to enqueue UST registration request (ust_commant) and protected
60 * by a futex with a scheme N wakers / 1 waiters. See futex.c/.h
61 */
62 struct ust_cmd_queue {
63 int32_t futex;
64 struct cds_wfq_queue queue;
65 };
66
67 #endif /* _LTT_SESSIOND_H */
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