84385ce71d077de12bdccfa95f4d787d931afb30
[lttng-tools.git] / liblttsessiondcomm / liblttsessiondcomm.h
1 /* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
2 *
3 * This program is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU General Public License
5 * as published by the Free Software Foundation; either version 2
6 * of the License, or (at your option) any later version.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
16 *
17 */
18
19 #ifndef _LIBLTTSESSIONDCOMM_H
20 #define _LIBLTTSESSIONDCOMM_H
21
22 #include <limits.h>
23 #include <uuid/uuid.h>
24
25 /* Default unix socket path */
26 #define DEFAULT_GLOBAL_CLIENT_UNIX_SOCK "/tmp/client-ltt-sessiond"
27 #define DEFAULT_GLOBAL_APPS_UNIX_SOCK "/tmp/apps-ltt-sessiond"
28 #define DEFAULT_HOME_APPS_UNIX_SOCK "%s/.apps-ltt-sessiond"
29 #define DEFAULT_HOME_CLIENT_UNIX_SOCK "%s/.client-ltt-sessiond"
30
31 /* Queue size of listen(2) */
32 #define MAX_LISTEN 10
33
34 /* Get the error code index from 0 since
35 * LTTCOMM_OK start at 1000
36 */
37 #define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_OK)
38
39 enum lttcomm_command_type {
40 LTTNG_CREATE_SESSION,
41 LTTNG_DESTROY_SESSION,
42 LTTNG_FORCE_SUBBUF_SWITCH,
43 LTTNG_GET_ALL_SESSION,
44 LTTNG_GET_SOCK_PATH,
45 LTTNG_GET_SUBBUF_NUM_SIZE,
46 LTTNG_LIST_MARKERS,
47 LTTNG_LIST_SESSIONS,
48 LTTNG_LIST_TRACE_EVENTS,
49 LTTNG_SETUP_TRACE,
50 LTTNG_SET_SOCK_PATH,
51 LTTNG_SET_SUBBUF_NUM,
52 LTTNG_SET_SUBBUF_SIZE,
53 UST_ALLOC_TRACE,
54 UST_CREATE_TRACE,
55 UST_DESTROY_TRACE,
56 UST_DISABLE_MARKER,
57 UST_ENABLE_MARKER,
58 UST_LIST_APPS,
59 UST_START_TRACE,
60 UST_STOP_TRACE,
61 };
62
63 /*
64 * lttcomm error code.
65 */
66 enum lttcomm_return_code {
67 LTTCOMM_OK = 1000, /* Ok */
68 LTTCOMM_ERR, /* Unknown Error */
69 LTTCOMM_UND, /* Undefine command */
70 LTTCOMM_ALLOC_FAIL, /* Trace allocation fail */
71 LTTCOMM_NO_SESSION, /* No session found */
72 LTTCOMM_CREATE_FAIL, /* Create trace fail */
73 LTTCOMM_SESSION_FAIL, /* Create session fail */
74 LTTCOMM_START_FAIL, /* Start tracing fail */
75 LTTCOMM_LIST_FAIL, /* Listing apps fail */
76 LTTCOMM_NO_APPS, /* No traceable application */
77 LTTCOMM_NR, /* Last element */
78 };
79
80 /*
81 * Data structure for ltt-session received message
82 */
83 struct lttcomm_session_msg {
84 /* Common data to almost all command */
85 enum lttcomm_command_type cmd_type;
86 uuid_t session_id;
87 char trace_name[NAME_MAX];
88 char session_name[NAME_MAX];
89 pid_t pid;
90 union {
91 struct {
92 int auto_session;
93 } create_session;
94 /* Marker data */
95 struct {
96 char channel[NAME_MAX];
97 char marker[NAME_MAX];
98 } marker;
99 /* SET_SOCK_PATH */
100 struct {
101 char sock_path[PATH_MAX];
102 } sock_path;
103 /* SET_SUBBUF_NUM */
104 struct {
105 unsigned int subbuf_num;
106 char channel[NAME_MAX];
107 } subbuf_num;
108 /* SET_SUBBUF_SIZE */
109 struct {
110 unsigned int subbuf_size;
111 char channel[NAME_MAX];
112 } subbuf_size;
113 } u;
114 };
115
116 /*
117 * Data structure for the lttng client response
118 */
119 struct lttcomm_lttng_msg {
120 enum lttcomm_command_type cmd_type;
121 enum lttcomm_return_code ret_code;
122 uuid_t session_id;
123 pid_t pid;
124 char trace_name[NAME_MAX];
125 /* This flag indicates how many packet are in
126 * the transmission. Ex: If list apps is requested,
127 * and there is 4 pids registered, num_pckt will be 4
128 */
129 unsigned int num_pckt;
130 union {
131 /* UST_LIST_APPS */
132 struct {
133 pid_t pid;
134 } list_apps;
135 } u;
136 };
137
138 extern int lttcomm_create_unix_sock(const char *pathname);
139 extern int lttcomm_connect_unix_sock(const char *pathname);
140 extern int lttcomm_accept_unix_sock(int sock);
141 extern int lttcomm_listen_unix_sock(int sock);
142 extern ssize_t lttcomm_recv_unix_sock(int sock, void *buf, size_t len);
143 extern ssize_t lttcomm_send_unix_sock(int sock, void *buf, size_t len);
144 extern const char *lttcomm_get_readable_code(enum lttcomm_return_code code);
145
146 #endif /* _LIBLTTSESSIONDCOMM_H */
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