Support creds passing between lttng and sessiond
[lttng-tools.git] / 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
56fff090 26#include "ust-app.h"
099e26bd 27
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28#define DEFAULT_HOME_DIR "/tmp"
29#define DEFAULT_UST_SOCK_DIR DEFAULT_HOME_DIR "/ust-app-socks"
30#define DEFAULT_GLOBAL_APPS_PIPE DEFAULT_UST_SOCK_DIR "/global"
31#define DEFAULT_TRACE_OUTPUT DEFAULT_HOME_DIR "/lttng"
ab147185 32
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33#define DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH "/lttng-ust-apps-wait"
34#define DEFAULT_HOME_APPS_WAIT_SHM_PATH "/lttng-ust-apps-wait-%u"
35
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36struct module_param {
37 const char *name;
38 int required;
39};
686204ab 40
b73401da 41/* LTTng kernel tracer modules list */
ab147185 42const struct module_param kernel_modules_list[] = {
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43 { "lttng-ftrace", 0 },
44 { "lttng-kprobes", 0 },
45 { "lttng-kretprobes", 0 },
ab147185 46 { "lib-ring-buffer", 1 },
d0254c7c 47 { "ltt-relay", 1 },
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48 { "ltt-ring-buffer-client-discard", 1 },
49 { "ltt-ring-buffer-client-overwrite", 1 },
50 { "ltt-ring-buffer-metadata-client", 1 },
51 { "ltt-ring-buffer-client-mmap-discard", 1 },
52 { "ltt-ring-buffer-client-mmap-overwrite", 1 },
53 { "ltt-ring-buffer-metadata-mmap-client", 1 },
54 { "lttng-probe-lttng", 1 },
55 { "lttng-types", 0 },
56 { "lttng-probe-block", 0 },
57 { "lttng-probe-irq", 0 },
58 { "lttng-probe-kvm", 0 },
59 { "lttng-probe-sched", 0 },
b73401da 60};
20fe2104 61
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62extern const char default_home_dir[],
63 default_tracing_group[],
64 default_ust_sock_dir[],
65 default_global_apps_pipe[];
fac6795d 66
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67/*
68 * This contains extra data needed for processing a command received by the
69 * session daemon from the lttng client.
70 */
71struct command_ctx {
72 int ust_sock;
73 unsigned int lttng_msg_size;
be040666 74 struct ucred creds;
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75 struct ltt_session *session;
76 struct lttcomm_lttng_msg *llm;
77 struct lttcomm_session_msg *lsm;
78};
79
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80struct ust_command {
81 int sock;
82 struct ust_register_msg reg_msg;
83 struct cds_wfq_node node;
84};
85
86/*
87 * Queue used to enqueue UST registration request (ust_commant) and protected
88 * by a futex with a scheme N wakers / 1 waiters. See futex.c/.h
89 */
90struct ust_cmd_queue {
91 int32_t futex;
92 struct cds_wfq_queue queue;
93};
94
fac6795d 95#endif /* _LTT_SESSIOND_H */
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