0446363c37c78b0bcf296d5aa782bd3749e3063d
[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_consumerd64_fd, ust_consumerd32_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 uint32_t bits_per_long;
42 char name[16];
43 };
44
45 /*
46 * Global applications HT used by the session daemon.
47 */
48 struct cds_lfht *ust_app_ht;
49
50 struct cds_lfht *ust_app_sock_key_map;
51
52 struct ust_app_key {
53 pid_t pid;
54 int sock;
55 struct cds_lfht_node node;
56 };
57
58 struct ust_app_event {
59 int enabled;
60 int handle;
61 struct lttng_ust_object_data *obj;
62 struct lttng_ust_event attr;
63 char name[LTTNG_UST_SYM_NAME_LEN];
64 struct cds_lfht *ctx;
65 struct cds_lfht_node node;
66 };
67
68 struct ust_app_channel {
69 int enabled;
70 int handle;
71 char name[LTTNG_UST_SYM_NAME_LEN];
72 struct lttng_ust_channel attr;
73 struct lttng_ust_object_data *obj;
74 struct ltt_ust_stream_list streams;
75 struct cds_lfht *ctx;
76 struct cds_lfht *events;
77 struct cds_lfht_node node;
78 };
79
80 struct ust_app_session {
81 int enabled;
82 /* started: has the session been in started state at any time ? */
83 int started; /* allows detection of start vs restart. */
84 int handle; /* Used has unique identifier */
85 unsigned int uid;
86 struct ltt_ust_metadata *metadata;
87 struct cds_lfht *channels; /* Registered channels */
88 struct cds_lfht_node node;
89 char path[PATH_MAX];
90 };
91
92 /*
93 * Registered traceable applications. Libust registers to the session daemon
94 * and a linked list is kept of all running traceable app.
95 */
96 struct ust_app {
97 pid_t ppid;
98 uid_t uid; /* User ID that owns the apps */
99 gid_t gid; /* Group ID that owns the apps */
100 int bits_per_long;
101 uint32_t v_major; /* Verion major number */
102 uint32_t v_minor; /* Verion minor number */
103 char name[17]; /* Process name (short) */
104 struct cds_lfht *sessions;
105 struct cds_lfht_node node;
106 struct ust_app_key key;
107 };
108
109 #ifdef HAVE_LIBLTTNG_UST_CTL
110
111 int ust_app_register(struct ust_register_msg *msg, int sock);
112 void ust_app_unregister(int sock);
113 int ust_app_create_channel_all(struct ltt_ust_session *usess,
114 struct ltt_ust_channel *uchan);
115 int ust_app_create_event_all(struct ltt_ust_session *usess,
116 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
117 unsigned long ust_app_list_count(void);
118 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app);
119 int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app);
120 int ust_app_start_trace_all(struct ltt_ust_session *usess);
121 int ust_app_stop_trace_all(struct ltt_ust_session *usess);
122 int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app);
123 int ust_app_destroy_trace_all(struct ltt_ust_session *usess);
124 int ust_app_list_events(struct lttng_event **events);
125 int ust_app_disable_channel_all(struct ltt_ust_session *usess,
126 struct ltt_ust_channel *uchan);
127 int ust_app_enable_channel_all(struct ltt_ust_session *usess,
128 struct ltt_ust_channel *uchan);
129 void ust_app_global_update(struct ltt_ust_session *usess, int sock);
130
131 void ust_app_clean_list(void);
132 void ust_app_ht_alloc(void);
133 struct cds_lfht *ust_app_get_ht(void);
134 struct ust_app *ust_app_find_by_pid(pid_t pid);
135
136 #else /* HAVE_LIBLTTNG_UST_CTL */
137
138 static inline
139 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
140 {
141 return 0;
142 }
143 static inline
144 int ust_app_start_trace_all(struct ltt_ust_session *usess)
145 {
146 return 0;
147 }
148 static inline
149 int ust_app_list_events(struct lttng_event **events)
150 {
151 return 0;
152 }
153 static inline
154 int ust_app_register(struct ust_register_msg *msg, int sock)
155 {
156 return -ENOSYS;
157 }
158 static inline
159 void ust_app_unregister(int sock)
160 {
161 }
162 static inline
163 unsigned int ust_app_list_count(void)
164 {
165 return 0;
166 }
167 static inline
168 void ust_app_lock_list(void)
169 {
170 }
171 static inline
172 void ust_app_unlock_list(void)
173 {
174 }
175 static inline
176 void ust_app_clean_list(void)
177 {
178 }
179 static inline
180 struct ust_app_list *ust_app_get_list(void)
181 {
182 return NULL;
183 }
184 static inline
185 struct ust_app *ust_app_get_by_pid(pid_t pid)
186 {
187 return NULL;
188 }
189 static inline
190 int ust_app_add_channel_all(struct ltt_ust_session *usess,
191 struct ltt_ust_channel *uchan)
192 {
193 return 0;
194 }
195 static inline
196 int ust_app_add_event_all(struct ltt_ust_session *usess,
197 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
198 {
199 return 0;
200 }
201 static inline
202 struct cds_lfht *ust_app_get_ht(void)
203 {
204 return NULL;
205 }
206 static inline
207 void ust_app_ht_alloc(void)
208 {
209 }
210 static inline
211 void ust_app_global_update(struct ltt_ust_session *usess, int sock)
212 {
213 }
214
215 #endif /* HAVE_LIBLTTNG_UST_CTL */
216
217 #endif /* _LTT_UST_APP_H */
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