Commit | Line | Data |
---|---|---|
54d01ffb DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
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. | |
54d01ffb | 7 | * |
d14d33bf AM |
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. | |
54d01ffb | 12 | * |
d14d33bf AM |
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. | |
54d01ffb DG |
16 | */ |
17 | ||
be040666 | 18 | #define _GNU_SOURCE |
6c1c0768 | 19 | #define _LGPL_SOURCE |
d87bfb32 | 20 | #include <errno.h> |
54d01ffb | 21 | #include <urcu/list.h> |
2bdd86d4 | 22 | #include <string.h> |
54d01ffb DG |
23 | |
24 | #include <lttng/lttng.h> | |
db758600 | 25 | #include <common/error.h> |
10a8a223 | 26 | #include <common/sessiond-comm/sessiond-comm.h> |
54d01ffb DG |
27 | |
28 | #include "channel.h" | |
29 | #include "event.h" | |
4771f025 | 30 | #include "kernel.h" |
be6a6276 | 31 | #include "lttng-sessiond.h" |
9df8df5e | 32 | #include "ust-ctl.h" |
edb67388 DG |
33 | #include "ust-app.h" |
34 | #include "trace-kernel.h" | |
35 | #include "trace-ust.h" | |
54d01ffb | 36 | |
025faf73 DG |
37 | /* |
38 | * Add unique UST event based on the event name, filter bytecode and loglevel. | |
39 | */ | |
18eace3b DG |
40 | static void add_unique_ust_event(struct lttng_ht *ht, |
41 | struct ltt_ust_event *event) | |
42 | { | |
43 | struct cds_lfht_node *node_ptr; | |
44 | struct ltt_ust_ht_key key; | |
45 | ||
46 | assert(ht); | |
47 | assert(ht->ht); | |
48 | assert(event); | |
49 | ||
50 | key.name = event->attr.name; | |
51 | key.filter = (struct lttng_filter_bytecode *) event->filter; | |
52 | key.loglevel = event->attr.loglevel; | |
4031e53e | 53 | key.exclusion = event->exclusion; |
18eace3b DG |
54 | |
55 | node_ptr = cds_lfht_add_unique(ht->ht, | |
56 | ht->hash_fct(event->node.key, lttng_ht_seed), | |
57 | trace_ust_ht_match_event, &key, &event->node.node); | |
58 | assert(node_ptr == &event->node.node); | |
59 | } | |
60 | ||
54d01ffb | 61 | /* |
7a3d1328 | 62 | * Disable kernel tracepoint event for a channel from the kernel session. |
54d01ffb | 63 | */ |
d3a56674 DG |
64 | int event_kernel_disable_tracepoint(struct ltt_kernel_channel *kchan, |
65 | char *event_name) | |
54d01ffb DG |
66 | { |
67 | int ret; | |
68 | struct ltt_kernel_event *kevent; | |
69 | ||
0525e9ae DG |
70 | assert(kchan); |
71 | ||
54d01ffb DG |
72 | kevent = trace_kernel_get_event_by_name(event_name, kchan); |
73 | if (kevent == NULL) { | |
f73fabfd | 74 | ret = LTTNG_ERR_NO_EVENT; |
54d01ffb DG |
75 | goto error; |
76 | } | |
77 | ||
78 | ret = kernel_disable_event(kevent); | |
79 | if (ret < 0) { | |
f73fabfd | 80 | ret = LTTNG_ERR_KERN_DISABLE_FAIL; |
54d01ffb DG |
81 | goto error; |
82 | } | |
83 | ||
84 | DBG("Kernel event %s disable for channel %s.", | |
85 | kevent->event->name, kchan->channel->name); | |
86 | ||
f73fabfd | 87 | ret = LTTNG_OK; |
54d01ffb DG |
88 | |
89 | error: | |
90 | return ret; | |
91 | } | |
92 | ||
6e911cad MD |
93 | /* |
94 | * Enable kernel system call for a channel from the kernel session. | |
95 | */ | |
96 | int event_kernel_enable_syscall(struct ltt_kernel_channel *kchan, | |
97 | char *syscall_name) | |
98 | { | |
99 | int ret; | |
100 | ||
101 | assert(kchan); | |
102 | ||
103 | ret = kernel_enable_syscall(syscall_name, kchan); | |
104 | if (ret < 0) { | |
105 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; | |
106 | goto error; | |
107 | } | |
108 | ||
29c62722 | 109 | DBG("Kernel syscall %s enable for channel %s.", |
6e911cad MD |
110 | syscall_name, kchan->channel->name); |
111 | ||
112 | ret = LTTNG_OK; | |
113 | ||
114 | error: | |
115 | return ret; | |
116 | } | |
117 | ||
118 | /* | |
119 | * Disable kernel system call for a channel from the kernel session. | |
120 | */ | |
121 | int event_kernel_disable_syscall(struct ltt_kernel_channel *kchan, | |
122 | char *syscall_name) | |
123 | { | |
124 | int ret; | |
125 | ||
126 | assert(kchan); | |
127 | ||
128 | ret = kernel_disable_syscall(syscall_name, kchan); | |
129 | if (ret < 0) { | |
130 | ret = LTTNG_ERR_KERN_DISABLE_FAIL; | |
131 | goto error; | |
132 | } | |
133 | ||
134 | DBG("Kernel syscall %s disable for channel %s.", | |
29c62722 | 135 | !strcmp(syscall_name, "*") ? "<all>" : syscall_name, |
6e911cad MD |
136 | kchan->channel->name); |
137 | ||
138 | ret = LTTNG_OK; | |
139 | ||
140 | error: | |
141 | return ret; | |
142 | } | |
143 | ||
54d01ffb | 144 | /* |
7a3d1328 | 145 | * Disable kernel tracepoint events for a channel from the kernel session. |
54d01ffb | 146 | */ |
d3a56674 | 147 | int event_kernel_disable_all_tracepoints(struct ltt_kernel_channel *kchan) |
54d01ffb DG |
148 | { |
149 | int ret; | |
150 | struct ltt_kernel_event *kevent; | |
151 | ||
0525e9ae DG |
152 | assert(kchan); |
153 | ||
54d01ffb DG |
154 | /* For each event in the kernel session */ |
155 | cds_list_for_each_entry(kevent, &kchan->events_list.head, list) { | |
156 | ret = kernel_disable_event(kevent); | |
157 | if (ret < 0) { | |
158 | /* We continue disabling the rest */ | |
159 | continue; | |
160 | } | |
161 | } | |
f73fabfd | 162 | ret = LTTNG_OK; |
7a3d1328 MD |
163 | return ret; |
164 | } | |
165 | ||
7a3d1328 MD |
166 | /* |
167 | * Disable all kernel event for a channel from the kernel session. | |
168 | */ | |
d3a56674 | 169 | int event_kernel_disable_all(struct ltt_kernel_channel *kchan) |
7a3d1328 MD |
170 | { |
171 | int ret; | |
172 | ||
0525e9ae DG |
173 | assert(kchan); |
174 | ||
d3a56674 | 175 | ret = event_kernel_disable_all_tracepoints(kchan); |
f73fabfd | 176 | if (ret != LTTNG_OK) |
7a3d1328 | 177 | return ret; |
29c62722 | 178 | ret = event_kernel_disable_syscall(kchan, "*"); |
54d01ffb DG |
179 | return ret; |
180 | } | |
181 | ||
182 | /* | |
7a3d1328 | 183 | * Enable kernel tracepoint event for a channel from the kernel session. |
49d21f93 | 184 | * We own filter_expression and filter. |
54d01ffb | 185 | */ |
d3a56674 DG |
186 | int event_kernel_enable_tracepoint(struct ltt_kernel_channel *kchan, |
187 | struct lttng_event *event) | |
54d01ffb DG |
188 | { |
189 | int ret; | |
190 | struct ltt_kernel_event *kevent; | |
191 | ||
0525e9ae DG |
192 | assert(kchan); |
193 | assert(event); | |
194 | ||
54d01ffb DG |
195 | kevent = trace_kernel_get_event_by_name(event->name, kchan); |
196 | if (kevent == NULL) { | |
197 | ret = kernel_create_event(event, kchan); | |
198 | if (ret < 0) { | |
bd29c13d DG |
199 | switch (-ret) { |
200 | case EEXIST: | |
f73fabfd | 201 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
bd29c13d DG |
202 | break; |
203 | case ENOSYS: | |
f73fabfd | 204 | ret = LTTNG_ERR_KERN_EVENT_ENOSYS; |
bd29c13d DG |
205 | break; |
206 | default: | |
f73fabfd | 207 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
bd29c13d | 208 | break; |
d87bfb32 | 209 | } |
7a3d1328 | 210 | goto end; |
54d01ffb DG |
211 | } |
212 | } else if (kevent->enabled == 0) { | |
213 | ret = kernel_enable_event(kevent); | |
214 | if (ret < 0) { | |
f73fabfd | 215 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
7a3d1328 | 216 | goto end; |
54d01ffb | 217 | } |
42224349 DG |
218 | } else { |
219 | /* At this point, the event is considered enabled */ | |
f73fabfd | 220 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
42224349 | 221 | goto end; |
54d01ffb | 222 | } |
42224349 | 223 | |
f73fabfd | 224 | ret = LTTNG_OK; |
7a3d1328 | 225 | end: |
54d01ffb DG |
226 | return ret; |
227 | } | |
228 | ||
7f79d3a1 DG |
229 | /* |
230 | * ============================ | |
231 | * UST : The Ultimate Frontier! | |
232 | * ============================ | |
233 | */ | |
234 | ||
76d45b40 DG |
235 | /* |
236 | * Enable all UST tracepoints for a channel from a UST session. | |
237 | */ | |
7972aab2 | 238 | int event_ust_enable_all_tracepoints(struct ltt_ust_session *usess, |
6b453b5e JG |
239 | struct ltt_ust_channel *uchan, |
240 | char *filter_expression, | |
241 | struct lttng_filter_bytecode *filter) | |
76d45b40 | 242 | { |
6775595e | 243 | int ret, i, size; |
bec39940 | 244 | struct lttng_ht_iter iter; |
76d45b40 | 245 | struct ltt_ust_event *uevent = NULL; |
7f79d3a1 | 246 | struct lttng_event *events = NULL; |
76d45b40 | 247 | |
0525e9ae DG |
248 | assert(usess); |
249 | assert(uchan); | |
250 | ||
025faf73 DG |
251 | rcu_read_lock(); |
252 | ||
7972aab2 DG |
253 | /* Enable existing events */ |
254 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, | |
255 | node.node) { | |
256 | if (uevent->enabled == 0) { | |
257 | ret = ust_app_enable_event_glb(usess, uchan, uevent); | |
258 | if (ret < 0) { | |
76d45b40 DG |
259 | continue; |
260 | } | |
7972aab2 DG |
261 | uevent->enabled = 1; |
262 | } | |
263 | } | |
76d45b40 | 264 | |
7972aab2 DG |
265 | /* Get all UST available events */ |
266 | size = ust_app_list_events(&events); | |
267 | if (size < 0) { | |
268 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
269 | goto error; | |
270 | } | |
76d45b40 | 271 | |
7972aab2 DG |
272 | for (i = 0; i < size; i++) { |
273 | /* | |
274 | * Check if event exist and if so, continue since it was enable | |
275 | * previously. | |
276 | */ | |
277 | uevent = trace_ust_find_event(uchan->events, events[i].name, filter, | |
10646003 | 278 | events[i].loglevel, NULL); |
7972aab2 | 279 | if (uevent != NULL) { |
76d45b40 DG |
280 | ret = ust_app_enable_event_pid(usess, uchan, uevent, |
281 | events[i].pid); | |
282 | if (ret < 0) { | |
7972aab2 | 283 | if (ret != -LTTNG_UST_ERR_EXIST) { |
f73fabfd | 284 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
7972aab2 | 285 | goto error; |
76d45b40 | 286 | } |
76d45b40 | 287 | } |
7972aab2 DG |
288 | continue; |
289 | } | |
76d45b40 | 290 | |
7972aab2 | 291 | /* Create ust event */ |
6b453b5e JG |
292 | uevent = trace_ust_create_event(&events[i], filter_expression, |
293 | filter, NULL); | |
7972aab2 DG |
294 | if (uevent == NULL) { |
295 | ret = LTTNG_ERR_FATAL; | |
296 | goto error_destroy; | |
76d45b40 DG |
297 | } |
298 | ||
7972aab2 DG |
299 | /* Create event for the specific PID */ |
300 | ret = ust_app_enable_event_pid(usess, uchan, uevent, | |
301 | events[i].pid); | |
302 | if (ret < 0) { | |
303 | if (ret == -LTTNG_UST_ERR_EXIST) { | |
304 | ret = LTTNG_ERR_UST_EVENT_EXIST; | |
305 | goto error; | |
306 | } else { | |
307 | ret = LTTNG_ERR_UST_ENABLE_FAIL; | |
308 | goto error_destroy; | |
309 | } | |
310 | } | |
311 | ||
312 | uevent->enabled = 1; | |
313 | /* Add ltt ust event to channel */ | |
314 | rcu_read_lock(); | |
315 | add_unique_ust_event(uchan->events, uevent); | |
316 | rcu_read_unlock(); | |
76d45b40 | 317 | } |
7972aab2 | 318 | free(events); |
76d45b40 | 319 | |
025faf73 | 320 | rcu_read_unlock(); |
f73fabfd | 321 | return LTTNG_OK; |
76d45b40 | 322 | |
7f79d3a1 | 323 | error_destroy: |
76d45b40 | 324 | trace_ust_destroy_event(uevent); |
7f79d3a1 DG |
325 | |
326 | error: | |
327 | free(events); | |
025faf73 | 328 | rcu_read_unlock(); |
76d45b40 DG |
329 | return ret; |
330 | } | |
331 | ||
2bdd86d4 MD |
332 | /* |
333 | * Enable UST tracepoint event for a channel from a UST session. | |
49d21f93 | 334 | * We own filter_expression, filter, and exclusion. |
2bdd86d4 | 335 | */ |
7972aab2 | 336 | int event_ust_enable_tracepoint(struct ltt_ust_session *usess, |
025faf73 | 337 | struct ltt_ust_channel *uchan, struct lttng_event *event, |
6b453b5e | 338 | char *filter_expression, |
f1613f52 JI |
339 | struct lttng_filter_bytecode *filter, |
340 | struct lttng_event_exclusion *exclusion) | |
2bdd86d4 | 341 | { |
f73fabfd | 342 | int ret = LTTNG_OK, to_create = 0; |
edb67388 DG |
343 | struct ltt_ust_event *uevent; |
344 | ||
0525e9ae DG |
345 | assert(usess); |
346 | assert(uchan); | |
347 | assert(event); | |
348 | ||
18eace3b DG |
349 | rcu_read_lock(); |
350 | ||
025faf73 | 351 | uevent = trace_ust_find_event(uchan->events, event->name, filter, |
10646003 | 352 | event->loglevel, exclusion); |
edb67388 | 353 | if (uevent == NULL) { |
6b453b5e JG |
354 | uevent = trace_ust_create_event(event, filter_expression, |
355 | filter, exclusion); | |
49d21f93 MD |
356 | /* We have passed ownership */ |
357 | filter_expression = NULL; | |
358 | filter = NULL; | |
359 | exclusion = NULL; | |
edb67388 | 360 | if (uevent == NULL) { |
95a82664 | 361 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
edb67388 DG |
362 | goto error; |
363 | } | |
025faf73 | 364 | |
fc34caaa | 365 | /* Valid to set it after the goto error since uevent is still NULL */ |
edb67388 DG |
366 | to_create = 1; |
367 | } | |
2bdd86d4 | 368 | |
7f79d3a1 DG |
369 | if (uevent->enabled) { |
370 | /* It's already enabled so everything is OK */ | |
5bcdda4f | 371 | ret = LTTNG_ERR_UST_EVENT_ENABLED; |
7f79d3a1 DG |
372 | goto end; |
373 | } | |
374 | ||
fc34caaa DG |
375 | uevent->enabled = 1; |
376 | ||
7972aab2 DG |
377 | if (to_create) { |
378 | /* Create event on all UST registered apps for session */ | |
379 | ret = ust_app_create_event_glb(usess, uchan, uevent); | |
380 | } else { | |
381 | /* Enable event on all UST registered apps for session */ | |
382 | ret = ust_app_enable_event_glb(usess, uchan, uevent); | |
383 | } | |
48842b30 | 384 | |
7972aab2 DG |
385 | if (ret < 0) { |
386 | if (ret == -LTTNG_UST_ERR_EXIST) { | |
387 | ret = LTTNG_ERR_UST_EVENT_EXIST; | |
388 | goto end; | |
389 | } else { | |
390 | ret = LTTNG_ERR_UST_ENABLE_FAIL; | |
391 | goto error; | |
edb67388 | 392 | } |
2bdd86d4 | 393 | } |
48842b30 | 394 | |
7f79d3a1 | 395 | if (to_create) { |
fc34caaa | 396 | /* Add ltt ust event to channel */ |
18eace3b | 397 | add_unique_ust_event(uchan->events, uevent); |
7f79d3a1 | 398 | } |
edb67388 | 399 | |
7f79d3a1 DG |
400 | DBG("Event UST %s %s in channel %s", uevent->attr.name, |
401 | to_create ? "created" : "enabled", uchan->name); | |
402 | ||
f73fabfd | 403 | ret = LTTNG_OK; |
fc34caaa | 404 | |
fb89d070 | 405 | end: |
18eace3b | 406 | rcu_read_unlock(); |
49d21f93 MD |
407 | free(filter_expression); |
408 | free(filter); | |
409 | free(exclusion); | |
fc34caaa | 410 | return ret; |
edb67388 DG |
411 | |
412 | error: | |
fc34caaa DG |
413 | /* |
414 | * Only destroy event on creation time (not enabling time) because if the | |
415 | * event is found in the channel (to_create == 0), it means that at some | |
416 | * point the enable_event worked and it's thus valid to keep it alive. | |
417 | * Destroying it also implies that we also destroy it's shadow copy to sync | |
418 | * everyone up. | |
419 | */ | |
420 | if (to_create) { | |
421 | /* In this code path, the uevent was not added to the hash table */ | |
422 | trace_ust_destroy_event(uevent); | |
423 | } | |
18eace3b | 424 | rcu_read_unlock(); |
49d21f93 MD |
425 | free(filter_expression); |
426 | free(filter); | |
427 | free(exclusion); | |
2bdd86d4 MD |
428 | return ret; |
429 | } | |
430 | ||
7f79d3a1 DG |
431 | /* |
432 | * Disable UST tracepoint of a channel from a UST session. | |
433 | */ | |
7972aab2 | 434 | int event_ust_disable_tracepoint(struct ltt_ust_session *usess, |
7f79d3a1 | 435 | struct ltt_ust_channel *uchan, char *event_name) |
2bdd86d4 MD |
436 | { |
437 | int ret; | |
7f79d3a1 | 438 | struct ltt_ust_event *uevent; |
18eace3b DG |
439 | struct lttng_ht_node_str *node; |
440 | struct lttng_ht_iter iter; | |
18eace3b | 441 | struct lttng_ht *ht; |
2bdd86d4 | 442 | |
0525e9ae DG |
443 | assert(usess); |
444 | assert(uchan); | |
445 | assert(event_name); | |
446 | ||
18eace3b DG |
447 | ht = uchan->events; |
448 | ||
18eace3b | 449 | rcu_read_lock(); |
025faf73 DG |
450 | |
451 | /* | |
452 | * We use a custom lookup since we need the iterator for the next_duplicate | |
453 | * call in the do while loop below. | |
454 | */ | |
455 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) event_name, lttng_ht_seed), | |
456 | trace_ust_ht_match_event_by_name, event_name, &iter.iter); | |
18eace3b DG |
457 | node = lttng_ht_iter_get_node_str(&iter); |
458 | if (node == NULL) { | |
459 | DBG2("Trace UST event NOT found by name %s", event_name); | |
f73fabfd | 460 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; |
7f79d3a1 | 461 | goto error; |
2bdd86d4 | 462 | } |
7f79d3a1 | 463 | |
18eace3b DG |
464 | do { |
465 | uevent = caa_container_of(node, struct ltt_ust_event, node); | |
025faf73 DG |
466 | assert(uevent); |
467 | ||
18eace3b DG |
468 | if (uevent->enabled == 0) { |
469 | /* It's already disabled so everything is OK */ | |
a1dcaf0f | 470 | goto next; |
7f79d3a1 | 471 | } |
18eace3b | 472 | |
7972aab2 DG |
473 | ret = ust_app_disable_event_glb(usess, uchan, uevent); |
474 | if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) { | |
475 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
18eace3b DG |
476 | goto error; |
477 | } | |
18eace3b DG |
478 | uevent->enabled = 0; |
479 | ||
025faf73 DG |
480 | DBG2("Event UST %s disabled in channel %s", uevent->attr.name, |
481 | uchan->name); | |
482 | ||
a1dcaf0f | 483 | next: |
18eace3b DG |
484 | /* Get next duplicate event by name. */ |
485 | cds_lfht_next_duplicate(ht->ht, trace_ust_ht_match_event_by_name, | |
486 | event_name, &iter.iter); | |
487 | node = lttng_ht_iter_get_node_str(&iter); | |
488 | } while (node); | |
7f79d3a1 | 489 | |
f73fabfd | 490 | ret = LTTNG_OK; |
7f79d3a1 | 491 | |
7f79d3a1 | 492 | error: |
18eace3b | 493 | rcu_read_unlock(); |
7f79d3a1 DG |
494 | return ret; |
495 | } | |
496 | ||
497 | /* | |
498 | * Disable all UST tracepoints for a channel from a UST session. | |
499 | */ | |
7972aab2 | 500 | int event_ust_disable_all_tracepoints(struct ltt_ust_session *usess, |
7f79d3a1 DG |
501 | struct ltt_ust_channel *uchan) |
502 | { | |
6775595e | 503 | int ret, i, size; |
bec39940 | 504 | struct lttng_ht_iter iter; |
7f79d3a1 DG |
505 | struct ltt_ust_event *uevent = NULL; |
506 | struct lttng_event *events = NULL; | |
507 | ||
0525e9ae DG |
508 | assert(usess); |
509 | assert(uchan); | |
510 | ||
025faf73 DG |
511 | rcu_read_lock(); |
512 | ||
7972aab2 DG |
513 | /* Disabling existing events */ |
514 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, | |
515 | node.node) { | |
516 | if (uevent->enabled == 1) { | |
517 | ret = event_ust_disable_tracepoint(usess, uchan, | |
518 | uevent->attr.name); | |
519 | if (ret < 0) { | |
7f79d3a1 DG |
520 | continue; |
521 | } | |
522 | } | |
7f79d3a1 | 523 | } |
7972aab2 DG |
524 | |
525 | /* Get all UST available events */ | |
526 | size = ust_app_list_events(&events); | |
527 | if (size < 0) { | |
528 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
7f79d3a1 DG |
529 | goto error; |
530 | } | |
531 | ||
7972aab2 DG |
532 | for (i = 0; i < size; i++) { |
533 | ret = event_ust_disable_tracepoint(usess, uchan, | |
534 | events[i].name); | |
535 | if (ret != LTTNG_OK) { | |
536 | /* Continue to disable the rest... */ | |
537 | continue; | |
538 | } | |
539 | } | |
540 | free(events); | |
541 | ||
025faf73 | 542 | rcu_read_unlock(); |
f73fabfd | 543 | return LTTNG_OK; |
7f79d3a1 DG |
544 | |
545 | error: | |
546 | free(events); | |
025faf73 | 547 | rcu_read_unlock(); |
2bdd86d4 MD |
548 | return ret; |
549 | } | |
f20baf8e DG |
550 | |
551 | /* | |
022d91ba | 552 | * Enable all agent event for a given UST session. |
f20baf8e DG |
553 | * |
554 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
555 | */ | |
022d91ba | 556 | int event_agent_enable_all(struct ltt_ust_session *usess, |
fefd409b DG |
557 | struct agent *agt, struct lttng_event *event, |
558 | struct lttng_filter_bytecode *filter) | |
f20baf8e DG |
559 | { |
560 | int ret; | |
fefd409b | 561 | struct agent_event *aevent; |
f20baf8e DG |
562 | struct lttng_ht_iter iter; |
563 | ||
564 | assert(usess); | |
565 | ||
022d91ba | 566 | DBG("Event agent enabling ALL events for session %" PRIu64, usess->id); |
f20baf8e | 567 | |
022d91ba | 568 | /* Enable event on agent application through TCP socket. */ |
fefd409b | 569 | ret = event_agent_enable(usess, agt, event, filter); |
f20baf8e DG |
570 | if (ret != LTTNG_OK) { |
571 | goto error; | |
572 | } | |
573 | ||
574 | /* Flag every event that they are now enabled. */ | |
575 | rcu_read_lock(); | |
fefd409b | 576 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent, |
f20baf8e | 577 | node.node) { |
fefd409b | 578 | aevent->enabled = 1; |
f20baf8e DG |
579 | } |
580 | rcu_read_unlock(); | |
581 | ||
582 | ret = LTTNG_OK; | |
583 | ||
584 | error: | |
585 | return ret; | |
586 | } | |
587 | ||
588 | /* | |
022d91ba | 589 | * Enable a single agent event for a given UST session. |
f20baf8e DG |
590 | * |
591 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
592 | */ | |
fefd409b DG |
593 | int event_agent_enable(struct ltt_ust_session *usess, |
594 | struct agent *agt, struct lttng_event *event, | |
be6a6276 | 595 | struct lttng_filter_bytecode *filter) |
f20baf8e DG |
596 | { |
597 | int ret, created = 0; | |
fefd409b | 598 | struct agent_event *aevent; |
f20baf8e DG |
599 | |
600 | assert(usess); | |
601 | assert(event); | |
fefd409b | 602 | assert(agt); |
f20baf8e | 603 | |
022d91ba | 604 | DBG("Event agent enabling %s for session %" PRIu64 " with loglevel type %d " |
b2064f54 DG |
605 | "and loglevel %d", event->name, usess->id, event->loglevel_type, |
606 | event->loglevel); | |
f20baf8e | 607 | |
fefd409b DG |
608 | aevent = agent_find_event(event->name, event->loglevel, agt); |
609 | if (!aevent) { | |
610 | aevent = agent_create_event(event->name, filter); | |
611 | if (!aevent) { | |
f20baf8e DG |
612 | ret = LTTNG_ERR_NOMEM; |
613 | goto error; | |
614 | } | |
fefd409b DG |
615 | aevent->loglevel = event->loglevel; |
616 | aevent->loglevel_type = event->loglevel_type; | |
f20baf8e DG |
617 | created = 1; |
618 | } | |
619 | ||
620 | /* Already enabled? */ | |
fefd409b | 621 | if (aevent->enabled) { |
f20baf8e DG |
622 | goto end; |
623 | } | |
624 | ||
fefd409b | 625 | ret = agent_enable_event(aevent, agt->domain); |
f20baf8e DG |
626 | if (ret != LTTNG_OK) { |
627 | goto error; | |
628 | } | |
629 | ||
630 | /* If the event was created prior to the enable, add it to the domain. */ | |
631 | if (created) { | |
fefd409b | 632 | agent_add_event(aevent, agt); |
f20baf8e DG |
633 | } |
634 | ||
635 | end: | |
636 | return LTTNG_OK; | |
637 | ||
638 | error: | |
639 | if (created) { | |
fefd409b | 640 | agent_destroy_event(aevent); |
f20baf8e DG |
641 | } |
642 | return ret; | |
643 | } | |
644 | ||
da6c3a50 DG |
645 | /* |
646 | * Return the agent default event name to use by testing if the process is root | |
647 | * or not. Return NULL on error. | |
648 | */ | |
649 | const char *event_get_default_agent_ust_name(enum lttng_domain_type domain) | |
650 | { | |
651 | const char *default_event_name = NULL; | |
652 | ||
0e115563 DG |
653 | switch (domain) { |
654 | case LTTNG_DOMAIN_LOG4J: | |
da6c3a50 | 655 | if (is_root) { |
0e115563 | 656 | default_event_name = DEFAULT_SYS_LOG4J_EVENT_NAME; |
da6c3a50 | 657 | } else { |
0e115563 | 658 | default_event_name = DEFAULT_USER_LOG4J_EVENT_NAME; |
da6c3a50 | 659 | } |
0e115563 DG |
660 | break; |
661 | case LTTNG_DOMAIN_JUL: | |
da6c3a50 | 662 | if (is_root) { |
0e115563 | 663 | default_event_name = DEFAULT_SYS_JUL_EVENT_NAME; |
da6c3a50 | 664 | } else { |
0e115563 | 665 | default_event_name = DEFAULT_USER_JUL_EVENT_NAME; |
da6c3a50 | 666 | } |
0e115563 DG |
667 | break; |
668 | case LTTNG_DOMAIN_PYTHON: | |
669 | default_event_name = DEFAULT_USER_PYTHON_EVENT_NAME; | |
670 | break; | |
671 | default: | |
da6c3a50 DG |
672 | assert(0); |
673 | } | |
674 | ||
675 | return default_event_name; | |
676 | } | |
677 | ||
f20baf8e | 678 | /* |
022d91ba | 679 | * Disable a single agent event for a given UST session. |
f20baf8e DG |
680 | * |
681 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
682 | */ | |
fefd409b DG |
683 | int event_agent_disable(struct ltt_ust_session *usess, struct agent *agt, |
684 | char *event_name) | |
f20baf8e DG |
685 | { |
686 | int ret; | |
fefd409b | 687 | struct agent_event *aevent; |
be6a6276 DG |
688 | struct ltt_ust_event *uevent = NULL; |
689 | struct ltt_ust_channel *uchan = NULL; | |
71aecbf8 | 690 | const char *ust_event_name, *ust_channel_name; |
f20baf8e | 691 | |
fefd409b | 692 | assert(agt); |
f20baf8e DG |
693 | assert(usess); |
694 | assert(event_name); | |
695 | ||
022d91ba | 696 | DBG("Event agent disabling %s for session %" PRIu64, event_name, usess->id); |
f20baf8e | 697 | |
fefd409b DG |
698 | aevent = agent_find_event_by_name(event_name, agt); |
699 | if (!aevent) { | |
f20baf8e DG |
700 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; |
701 | goto error; | |
702 | } | |
703 | ||
704 | /* Already disabled? */ | |
fefd409b | 705 | if (!aevent->enabled) { |
f20baf8e DG |
706 | goto end; |
707 | } | |
708 | ||
71aecbf8 DG |
709 | if (agt->domain == LTTNG_DOMAIN_JUL) { |
710 | ust_channel_name = DEFAULT_JUL_CHANNEL_NAME; | |
711 | } else if (agt->domain == LTTNG_DOMAIN_LOG4J) { | |
712 | ust_channel_name = DEFAULT_LOG4J_CHANNEL_NAME; | |
0e115563 DG |
713 | } else if (agt->domain == LTTNG_DOMAIN_PYTHON) { |
714 | ust_channel_name = DEFAULT_PYTHON_CHANNEL_NAME; | |
71aecbf8 DG |
715 | } else { |
716 | ret = LTTNG_ERR_INVALID; | |
717 | goto error; | |
718 | } | |
719 | ||
be6a6276 DG |
720 | /* |
721 | * Disable it on the UST side. First get the channel reference then find | |
722 | * the event and finally disable it. | |
723 | */ | |
724 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
71aecbf8 | 725 | (char *) ust_channel_name); |
be6a6276 DG |
726 | if (!uchan) { |
727 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
728 | goto error; | |
729 | } | |
730 | ||
da6c3a50 DG |
731 | ust_event_name = event_get_default_agent_ust_name(agt->domain); |
732 | if (!ust_event_name) { | |
733 | ret = LTTNG_ERR_FATAL; | |
734 | goto error; | |
be6a6276 DG |
735 | } |
736 | ||
737 | /* | |
022d91ba | 738 | * The loglevel is hardcoded with 0 here since the agent ust event is set |
be6a6276 | 739 | * with the loglevel type to ALL thus the loglevel stays 0. The event's |
022d91ba | 740 | * filter is the one handling the loglevel for agent. |
be6a6276 | 741 | */ |
da6c3a50 | 742 | uevent = trace_ust_find_event(uchan->events, (char *) ust_event_name, |
fefd409b | 743 | aevent->filter, 0, NULL); |
022d91ba | 744 | /* If the agent event exists, it must be available on the UST side. */ |
be6a6276 DG |
745 | assert(uevent); |
746 | ||
747 | ret = ust_app_disable_event_glb(usess, uchan, uevent); | |
748 | if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) { | |
749 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
750 | goto error; | |
751 | } | |
752 | ||
0dcfcf94 DG |
753 | /* |
754 | * Flag event that it's disabled so the shadow copy on the ust app side | |
755 | * will disable it if an application shows up. | |
756 | */ | |
757 | uevent->enabled = 0; | |
758 | ||
fefd409b | 759 | ret = agent_disable_event(aevent, agt->domain); |
f20baf8e DG |
760 | if (ret != LTTNG_OK) { |
761 | goto error; | |
762 | } | |
763 | ||
764 | end: | |
765 | return LTTNG_OK; | |
766 | ||
767 | error: | |
768 | return ret; | |
769 | } | |
770 | /* | |
022d91ba | 771 | * Disable all agent event for a given UST session. |
f20baf8e DG |
772 | * |
773 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
774 | */ | |
fefd409b DG |
775 | int event_agent_disable_all(struct ltt_ust_session *usess, |
776 | struct agent *agt) | |
f20baf8e | 777 | { |
0dcfcf94 | 778 | int ret; |
fefd409b | 779 | struct agent_event *aevent; |
f20baf8e DG |
780 | struct lttng_ht_iter iter; |
781 | ||
fefd409b | 782 | assert(agt); |
f20baf8e DG |
783 | assert(usess); |
784 | ||
0dcfcf94 DG |
785 | /* |
786 | * Disable event on agent application. Continue to disable all other events | |
787 | * if the * event is not found. | |
788 | */ | |
fefd409b | 789 | ret = event_agent_disable(usess, agt, "*"); |
0dcfcf94 DG |
790 | if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_NOT_FOUND) { |
791 | goto error; | |
f20baf8e DG |
792 | } |
793 | ||
794 | /* Flag every event that they are now enabled. */ | |
795 | rcu_read_lock(); | |
fefd409b | 796 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent, |
f20baf8e | 797 | node.node) { |
0dcfcf94 DG |
798 | if (!aevent->enabled) { |
799 | continue; | |
800 | } | |
801 | ||
802 | ret = event_agent_disable(usess, agt, aevent->name); | |
803 | if (ret != LTTNG_OK) { | |
804 | rcu_read_unlock(); | |
805 | goto error; | |
f20baf8e | 806 | } |
f20baf8e DG |
807 | } |
808 | rcu_read_unlock(); | |
809 | ||
810 | ret = LTTNG_OK; | |
811 | ||
812 | error: | |
813 | return ret; | |
814 | } |