Implement UST destroy session
[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 extern int ust_consumer_fd;
30
31 /*
32 * Application registration data structure.
33 */
34 struct ust_register_msg {
35 uint32_t major;
36 uint32_t minor;
37 pid_t pid;
38 pid_t ppid;
39 uid_t uid;
40 gid_t gid;
41 char name[16];
42 };
43
44 /*
45 * Global applications HT used by the session daemon.
46 */
47 struct cds_lfht *ust_app_ht;
48
49 struct cds_lfht *ust_app_sock_key_map;
50
51 struct ust_app_key {
52 pid_t pid;
53 int sock;
54 struct cds_lfht_node node;
55 };
56
57 struct ust_app_event {
58 int enabled;
59 int handle;
60 struct lttng_ust_object_data *obj;
61 struct lttng_ust_event attr;
62 char name[LTTNG_UST_SYM_NAME_LEN];
63 struct cds_lfht *ctx;
64 struct cds_lfht_node node;
65 };
66
67 struct ust_app_channel {
68 int enabled;
69 int handle;
70 char name[LTTNG_UST_SYM_NAME_LEN];
71 struct lttng_ust_channel attr;
72 struct lttng_ust_object_data *obj;
73 struct ltt_ust_stream_list streams;
74 struct cds_lfht *ctx;
75 struct cds_lfht *events;
76 struct cds_lfht_node node;
77 };
78
79 struct ust_app_session {
80 int enabled;
81 /* started: has the session been in started state at any time ? */
82 int started; /* allows detection of start vs restart. */
83 int handle; /* Used has unique identifier */
84 unsigned int uid;
85 struct ltt_ust_metadata *metadata;
86 struct cds_lfht *channels; /* Registered channels */
87 struct cds_lfht_node node;
88 char path[PATH_MAX];
89 };
90
91 /*
92 * Registered traceable applications. Libust registers to the session daemon
93 * and a linked list is kept of all running traceable app.
94 */
95 struct ust_app {
96 pid_t ppid;
97 uid_t uid; /* User ID that owns the apps */
98 gid_t gid; /* Group ID that owns the apps */
99 uint32_t v_major; /* Verion major number */
100 uint32_t v_minor; /* Verion minor number */
101 char name[17]; /* Process name (short) */
102 struct cds_lfht *sessions;
103 struct cds_lfht_node node;
104 struct ust_app_key key;
105 };
106
107 #ifdef HAVE_LIBLTTNG_UST_CTL
108
109 int ust_app_register(struct ust_register_msg *msg, int sock);
110 void ust_app_unregister(int sock);
111 int ust_app_create_channel_all(struct ltt_ust_session *usess,
112 struct ltt_ust_channel *uchan);
113 int ust_app_create_event_all(struct ltt_ust_session *usess,
114 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
115 unsigned long ust_app_list_count(void);
116 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app);
117 int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app);
118 int ust_app_start_trace_all(struct ltt_ust_session *usess);
119 int ust_app_stop_trace_all(struct ltt_ust_session *usess);
120 int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app);
121 int ust_app_destroy_trace_all(struct ltt_ust_session *usess);
122 int ust_app_list_events(struct lttng_event **events);
123 void ust_app_global_update(struct ltt_ust_session *usess, int sock);
124
125 void ust_app_clean_list(void);
126 void ust_app_ht_alloc(void);
127 struct cds_lfht *ust_app_get_ht(void);
128 struct ust_app *ust_app_find_by_pid(pid_t pid);
129
130 #else /* HAVE_LIBLTTNG_UST_CTL */
131
132 static inline
133 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
134 {
135 return 0;
136 }
137 static inline
138 int ust_app_start_trace_all(struct ltt_ust_session *usess)
139 {
140 return 0;
141 }
142 static inline
143 int ust_app_list_events(struct lttng_event **events)
144 {
145 return 0;
146 }
147 static inline
148 int ust_app_register(struct ust_register_msg *msg, int sock)
149 {
150 return -ENOSYS;
151 }
152 static inline
153 void ust_app_unregister(int sock)
154 {
155 }
156 static inline
157 unsigned int ust_app_list_count(void)
158 {
159 return 0;
160 }
161 static inline
162 void ust_app_lock_list(void)
163 {
164 }
165 static inline
166 void ust_app_unlock_list(void)
167 {
168 }
169 static inline
170 void ust_app_clean_list(void)
171 {
172 }
173 static inline
174 struct ust_app_list *ust_app_get_list(void)
175 {
176 return NULL;
177 }
178 static inline
179 struct ust_app *ust_app_get_by_pid(pid_t pid)
180 {
181 return NULL;
182 }
183 static inline
184 int ust_app_add_channel_all(struct ltt_ust_session *usess,
185 struct ltt_ust_channel *uchan)
186 {
187 return 0;
188 }
189 static inline
190 int ust_app_add_event_all(struct ltt_ust_session *usess,
191 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
192 {
193 return 0;
194 }
195 static inline
196 struct cds_lfht *ust_app_get_ht(void)
197 {
198 return NULL;
199 }
200 static inline
201 void ust_app_ht_alloc(void)
202 {
203 }
204 static inline
205 void ust_app_global_update(struct ltt_ust_session *usess, int sock)
206 {
207 }
208
209 #endif /* HAVE_LIBLTTNG_UST_CTL */
210
211 #endif /* _LTT_UST_APP_H */
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