Verify UST comm proto version
[lttng-tools.git] / src / bin / lttng-sessiond / lttng-sessiond.h
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1/*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
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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
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6 * as published by the Free Software Foundation; only version 2
7 * of the License.
8c0faa1d 8 *
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9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
050349bb 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
fac6795d 12 * GNU General Public License for more details.
8c0faa1d 13 *
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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.
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17 */
18
19#ifndef _LTT_SESSIOND_H
20#define _LTT_SESSIOND_H
21
099e26bd 22#define _LGPL_SOURCE
f6a9efaa 23#include <urcu.h>
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24#include <urcu/wfqueue.h>
25
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26#include <common/sessiond-comm/sessiond-comm.h>
27
28#include "session.h"
56fff090 29#include "ust-app.h"
099e26bd 30
096102bd 31const char *module_proc_lttng = "/proc/lttng";
20fe2104 32
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33extern const char default_home_dir[],
34 default_tracing_group[],
35 default_ust_sock_dir[],
36 default_global_apps_pipe[];
fac6795d 37
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38/*
39 * This contains extra data needed for processing a command received by the
40 * session daemon from the lttng client.
41 */
42struct command_ctx {
43 int ust_sock;
44 unsigned int lttng_msg_size;
be040666 45 struct ucred creds;
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46 struct ltt_session *session;
47 struct lttcomm_lttng_msg *llm;
48 struct lttcomm_session_msg *lsm;
49};
50
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51struct ust_command {
52 int sock;
53 struct ust_register_msg reg_msg;
54 struct cds_wfq_node node;
55};
56
57/*
58 * Queue used to enqueue UST registration request (ust_commant) and protected
59 * by a futex with a scheme N wakers / 1 waiters. See futex.c/.h
60 */
61struct ust_cmd_queue {
62 int32_t futex;
63 struct cds_wfq_queue queue;
64};
65
fac6795d 66#endif /* _LTT_SESSIOND_H */
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