Support creds passing between lttng and sessiond
[lttng-tools.git] / 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 "ust-app.h"
27
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"
32
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
36 struct module_param {
37 const char *name;
38 int required;
39 };
40
41 /* LTTng kernel tracer modules list */
42 const struct module_param kernel_modules_list[] = {
43 { "lttng-ftrace", 0 },
44 { "lttng-kprobes", 0 },
45 { "lttng-kretprobes", 0 },
46 { "lib-ring-buffer", 1 },
47 { "ltt-relay", 1 },
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 },
60 };
61
62 extern const char default_home_dir[],
63 default_tracing_group[],
64 default_ust_sock_dir[],
65 default_global_apps_pipe[];
66
67 /*
68 * This contains extra data needed for processing a command received by the
69 * session daemon from the lttng client.
70 */
71 struct command_ctx {
72 int ust_sock;
73 unsigned int lttng_msg_size;
74 struct ucred creds;
75 struct ltt_session *session;
76 struct lttcomm_lttng_msg *llm;
77 struct lttcomm_session_msg *lsm;
78 };
79
80 struct 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 */
90 struct ust_cmd_queue {
91 int32_t futex;
92 struct cds_wfq_queue queue;
93 };
94
95 #endif /* _LTT_SESSIOND_H */
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