Implement filter bytecode support in lttng-session, and parse filter string
[lttng-tools.git] / src / bin / 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 modify
5 * it under the terms of the GNU General Public License, version 2 only,
6 * as published by the Free Software Foundation.
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 along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
16 */
17
18 #ifndef _LTT_UST_APP_H
19 #define _LTT_UST_APP_H
20
21 #include <stdint.h>
22
23 #include "trace-ust.h"
24
25 /* lttng-ust supported version. */
26 #define LTTNG_UST_COMM_MAJOR 2 /* comm protocol major version */
27 #define UST_APP_MAJOR_VERSION 2 /* UST version supported */
28
29 #define UST_APP_EVENT_LIST_SIZE 32
30
31 struct lttng_filter_bytecode;
32 struct lttng_ust_filter_bytecode;
33
34 extern int ust_consumerd64_fd, ust_consumerd32_fd;
35
36 /*
37 * Application registration data structure.
38 */
39 struct ust_register_msg {
40 uint32_t major;
41 uint32_t minor;
42 pid_t pid;
43 pid_t ppid;
44 uid_t uid;
45 gid_t gid;
46 uint32_t bits_per_long;
47 char name[16];
48 };
49
50 /*
51 * Global applications HT used by the session daemon. This table is indexed by
52 * PID using the pid_n node and pid value of an ust_app.
53 */
54 struct lttng_ht *ust_app_ht;
55
56 /*
57 * Global applications HT used by the session daemon. This table is indexed by
58 * socket using the sock_n node and sock value of an ust_app.
59 */
60 struct lttng_ht *ust_app_ht_by_sock;
61
62 struct ust_app_ctx {
63 int handle;
64 struct lttng_ust_context ctx;
65 struct lttng_ust_object_data *obj;
66 struct lttng_ht_node_ulong node;
67 };
68
69 struct ust_app_event {
70 int enabled;
71 int handle;
72 struct lttng_ust_object_data *obj;
73 struct lttng_ust_event attr;
74 char name[LTTNG_UST_SYM_NAME_LEN];
75 struct lttng_ht *ctx;
76 struct lttng_ht_node_str node;
77 struct lttng_ust_filter_bytecode *filter;
78 };
79
80 struct ust_app_channel {
81 int enabled;
82 int handle;
83 char name[LTTNG_UST_SYM_NAME_LEN];
84 struct lttng_ust_channel attr;
85 struct lttng_ust_object_data *obj;
86 struct ltt_ust_stream_list streams;
87 struct lttng_ht *ctx;
88 struct lttng_ht *events;
89 struct lttng_ht_node_str node;
90 };
91
92 struct ust_app_session {
93 int enabled;
94 /* started: has the session been in started state at any time ? */
95 int started; /* allows detection of start vs restart. */
96 int handle; /* used has unique identifier for app session */
97 int id; /* session unique identifier */
98 struct ltt_ust_metadata *metadata;
99 struct lttng_ht *channels; /* Registered channels */
100 struct lttng_ht_node_ulong node;
101 char path[PATH_MAX];
102 /* UID/GID of the user owning the session */
103 uid_t uid;
104 gid_t gid;
105 };
106
107 /*
108 * Registered traceable applications. Libust registers to the session daemon
109 * and a linked list is kept of all running traceable app.
110 */
111 struct ust_app {
112 int sock;
113 pid_t pid;
114 pid_t ppid;
115 uid_t uid; /* User ID that owns the apps */
116 gid_t gid; /* Group ID that owns the apps */
117 int bits_per_long;
118 int compatible; /* If the lttng-ust tracer version does not match the
119 supported version of the session daemon, this flag is
120 set to 0 (NOT compatible) else 1. */
121 struct lttng_ust_tracer_version version;
122 uint32_t v_major; /* Verion major number */
123 uint32_t v_minor; /* Verion minor number */
124 char name[17]; /* Process name (short) */
125 struct lttng_ht *sessions;
126 struct lttng_ht_node_ulong pid_n;
127 struct lttng_ht_node_ulong sock_n;
128 };
129
130 #ifdef HAVE_LIBLTTNG_UST_CTL
131
132 int ust_app_register(struct ust_register_msg *msg, int sock);
133 static inline
134 int ust_app_register_done(int sock)
135 {
136 return ustctl_register_done(sock);
137 }
138 void ust_app_unregister(int sock);
139 unsigned long ust_app_list_count(void);
140 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app);
141 int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app);
142 int ust_app_start_trace_all(struct ltt_ust_session *usess);
143 int ust_app_stop_trace_all(struct ltt_ust_session *usess);
144 int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app);
145 int ust_app_destroy_trace_all(struct ltt_ust_session *usess);
146 int ust_app_list_events(struct lttng_event **events);
147 int ust_app_list_event_fields(struct lttng_event_field **fields);
148 int ust_app_create_channel_glb(struct ltt_ust_session *usess,
149 struct ltt_ust_channel *uchan);
150 int ust_app_create_event_glb(struct ltt_ust_session *usess,
151 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
152 int ust_app_disable_event_pid(struct ltt_ust_session *usess,
153 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
154 pid_t pid);
155 int ust_app_enable_event_pid(struct ltt_ust_session *usess,
156 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
157 pid_t pid);
158 int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
159 struct ltt_ust_channel *uchan);
160 int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
161 struct ltt_ust_channel *uchan);
162 int ust_app_enable_event_glb(struct ltt_ust_session *usess,
163 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
164 int ust_app_disable_all_event_glb(struct ltt_ust_session *usess,
165 struct ltt_ust_channel *uchan);
166 int ust_app_enable_all_event_glb(struct ltt_ust_session *usess,
167 struct ltt_ust_channel *uchan);
168 int ust_app_disable_event_glb(struct ltt_ust_session *usess,
169 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
170 int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess,
171 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
172 struct ltt_ust_context *uctx);
173 int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
174 struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx);
175 int ust_app_set_filter_event_glb(struct ltt_ust_session *usess,
176 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
177 struct lttng_filter_bytecode *bytecode);
178 void ust_app_global_update(struct ltt_ust_session *usess, int sock);
179
180 void ust_app_clean_list(void);
181 void ust_app_ht_alloc(void);
182 struct lttng_ht *ust_app_get_ht(void);
183 struct ust_app *ust_app_find_by_pid(pid_t pid);
184 int ust_app_validate_version(int sock);
185 int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate);
186
187 #else /* HAVE_LIBLTTNG_UST_CTL */
188
189 static inline
190 int ust_app_destroy_trace_all(struct ltt_ust_session *usess)
191 {
192 return 0;
193 }
194 static inline
195 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
196 {
197 return 0;
198 }
199 static inline
200 int ust_app_start_trace_all(struct ltt_ust_session *usess)
201 {
202 return 0;
203 }
204 static inline
205 int ust_app_stop_trace_all(struct ltt_ust_session *usess)
206 {
207 return 0;
208 }
209 static inline
210 int ust_app_list_events(struct lttng_event **events)
211 {
212 return -ENOSYS;
213 }
214 static inline
215 int ust_app_list_event_fields(struct lttng_event_field **fields)
216 {
217 return -ENOSYS;
218 }
219 static inline
220 int ust_app_register(struct ust_register_msg *msg, int sock)
221 {
222 return -ENOSYS;
223 }
224 static inline
225 int ust_app_register_done(int sock)
226 {
227 return -ENOSYS;
228 }
229 static inline
230 void ust_app_unregister(int sock)
231 {
232 }
233 static inline
234 unsigned int ust_app_list_count(void)
235 {
236 return 0;
237 }
238 static inline
239 void ust_app_lock_list(void)
240 {
241 }
242 static inline
243 void ust_app_unlock_list(void)
244 {
245 }
246 static inline
247 void ust_app_clean_list(void)
248 {
249 }
250 static inline
251 struct ust_app_list *ust_app_get_list(void)
252 {
253 return NULL;
254 }
255 static inline
256 struct ust_app *ust_app_get_by_pid(pid_t pid)
257 {
258 return NULL;
259 }
260 static inline
261 struct lttng_ht *ust_app_get_ht(void)
262 {
263 return NULL;
264 }
265 static inline
266 void ust_app_ht_alloc(void)
267 {}
268 static inline
269 void ust_app_global_update(struct ltt_ust_session *usess, int sock)
270 {}
271 static inline
272 int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
273 struct ltt_ust_channel *uchan)
274 {
275 return 0;
276 }
277 static inline
278 int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
279 struct ltt_ust_channel *uchan)
280 {
281 return 0;
282 }
283 static inline
284 int ust_app_create_channel_glb(struct ltt_ust_session *usess,
285 struct ltt_ust_channel *uchan)
286 {
287 return 0;
288 }
289 static inline
290 int ust_app_disable_all_event_glb(struct ltt_ust_session *usess,
291 struct ltt_ust_channel *uchan)
292 {
293 return 0;
294 }
295 static inline
296 int ust_app_enable_all_event_glb(struct ltt_ust_session *usess,
297 struct ltt_ust_channel *uchan)
298 {
299 return 0;
300 }
301 static inline
302 int ust_app_create_event_glb(struct ltt_ust_session *usess,
303 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
304 {
305 return 0;
306 }
307 static inline
308 int ust_app_disable_event_glb(struct ltt_ust_session *usess,
309 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
310 {
311 return 0;
312 }
313 static inline
314 int ust_app_enable_event_glb(struct ltt_ust_session *usess,
315 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
316 {
317 return 0;
318 }
319 static inline
320 int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess,
321 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
322 struct ltt_ust_context *uctx)
323 {
324 return 0;
325 }
326 static inline
327 int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
328 struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx)
329 {
330 return 0;
331 }
332 static inline
333 int ust_app_enable_event_pid(struct ltt_ust_session *usess,
334 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
335 pid_t pid)
336 {
337 return 0;
338 }
339 static inline
340 int ust_app_disable_event_pid(struct ltt_ust_session *usess,
341 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
342 pid_t pid)
343 {
344 return 0;
345 }
346 static inline
347 int ust_app_validate_version(int sock)
348 {
349 return 0;
350 }
351 static inline
352 int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate)
353 {
354 return 0;
355 }
356
357 #endif /* HAVE_LIBLTTNG_UST_CTL */
358
359 #endif /* _LTT_UST_APP_H */
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