3fa4d423ccbf69c2dabd499f2cb843275074f2c7
[lttng-tools.git] / lttng-sessiond / ust-app.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_UST_APP_H
20 #define _LTT_UST_APP_H
21
22 #include <stdint.h>
23 #include <urcu/list.h>
24
25 #include "trace-ust.h"
26
27 #define UST_APP_EVENT_LIST_SIZE 32
28
29 /*
30 * Application registration data structure.
31 */
32 struct ust_register_msg {
33 uint32_t major;
34 uint32_t minor;
35 pid_t pid;
36 pid_t ppid;
37 uid_t uid;
38 gid_t gid;
39 char name[16];
40 };
41
42 /*
43 * Global applications HT used by the session daemon.
44 */
45 struct cds_lfht *ust_app_ht;
46
47 struct cds_lfht *ust_app_sock_key_map;
48
49 struct ust_app_key {
50 pid_t pid;
51 int sock;
52 struct cds_lfht_node node;
53 };
54
55 struct ust_app_event {
56 int enabled;
57 int handle;
58 struct lttng_ust_object_data *obj;
59 struct lttng_ust_event attr;
60 char name[LTTNG_UST_SYM_NAME_LEN];
61 struct cds_lfht *ctx;
62 struct cds_lfht_node node;
63 };
64
65 struct ust_app_channel {
66 int enabled;
67 int handle;
68 char name[LTTNG_UST_SYM_NAME_LEN];
69 struct lttng_ust_channel attr;
70 struct lttng_ust_object_data *obj;
71 struct ltt_ust_stream_list streams;
72 struct cds_lfht *ctx;
73 struct cds_lfht *events;
74 struct cds_lfht_node node;
75 };
76
77 struct ust_app_session {
78 int enabled;
79 int handle; /* Used has unique identifier */
80 unsigned int uid;
81 struct ltt_ust_metadata *metadata;
82 struct lttng_ust_object_data *obj;
83 struct cds_lfht *channels; /* Registered channels */
84 struct cds_lfht_node node;
85 };
86
87 /*
88 * Registered traceable applications. Libust registers to the session daemon
89 * and a linked list is kept of all running traceable app.
90 */
91 struct ust_app {
92 pid_t ppid;
93 uid_t uid; /* User ID that owns the apps */
94 gid_t gid; /* Group ID that owns the apps */
95 uint32_t v_major; /* Verion major number */
96 uint32_t v_minor; /* Verion minor number */
97 char name[17]; /* Process name (short) */
98 struct cds_lfht *sessions;
99 struct cds_lfht_node node;
100 struct ust_app_key key;
101 int sock_closed;
102 };
103
104 #ifdef HAVE_LIBLTTNG_UST_CTL
105
106 int ust_app_register(struct ust_register_msg *msg, int sock);
107 void ust_app_unregister(int sock);
108 int ust_app_add_channel_all(struct ltt_ust_session *usess,
109 struct ltt_ust_channel *uchan);
110 int ust_app_add_event_all(struct ltt_ust_session *usess,
111 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
112 unsigned long ust_app_list_count(void);
113 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app);
114 int ust_app_start_trace_all(struct ltt_ust_session *usess);
115 int ust_app_list_events(struct lttng_event **events);
116 void ust_app_global_update(struct ltt_ust_session *usess, int sock);
117
118 void ust_app_clean_list(void);
119 void ust_app_ht_alloc(void);
120 struct cds_lfht *ust_app_get_ht(void);
121 struct ust_app *ust_app_find_by_pid(pid_t pid);
122
123 #else /* HAVE_LIBLTTNG_UST_CTL */
124
125 static inline
126 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
127 {
128 return 0;
129 }
130 static inline
131 int ust_app_start_trace_all(struct ltt_ust_session *usess)
132 {
133 return 0;
134 }
135 static inline
136 int ust_app_list_events(struct lttng_event **events)
137 {
138 return 0;
139 }
140 static inline
141 int ust_app_register(struct ust_register_msg *msg, int sock)
142 {
143 return -ENOSYS;
144 }
145 static inline
146 void ust_app_unregister(int sock)
147 {
148 }
149 static inline
150 unsigned int ust_app_list_count(void)
151 {
152 return 0;
153 }
154 static inline
155 void ust_app_lock_list(void)
156 {
157 }
158 static inline
159 void ust_app_unlock_list(void)
160 {
161 }
162 static inline
163 void ust_app_clean_list(void)
164 {
165 }
166 static inline
167 struct ust_app_list *ust_app_get_list(void)
168 {
169 return NULL;
170 }
171 static inline
172 struct ust_app *ust_app_get_by_pid(pid_t pid)
173 {
174 return NULL;
175 }
176 static inline
177 int ust_app_add_channel_all(struct ltt_ust_session *usess,
178 struct ltt_ust_channel *uchan)
179 {
180 return 0;
181 }
182 static inline
183 int ust_app_add_event_all(struct ltt_ust_session *usess,
184 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
185 {
186 return 0;
187 }
188 static inline
189 struct cds_lfht *ust_app_get_ht(void)
190 {
191 return NULL;
192 }
193 static inline
194 void ust_app_ht_alloc(void)
195 {
196 }
197 static inline
198 void ust_app_global_update(struct ltt_ust_session *usess, int sock)
199 {
200 }
201
202 #endif /* HAVE_LIBLTTNG_UST_CTL */
203
204 #endif /* _LTT_UST_APP_H */
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