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" | |
7c1d2758 | 36 | #include "agent.h" |
54d01ffb | 37 | |
025faf73 DG |
38 | /* |
39 | * Add unique UST event based on the event name, filter bytecode and loglevel. | |
40 | */ | |
18eace3b DG |
41 | static void add_unique_ust_event(struct lttng_ht *ht, |
42 | struct ltt_ust_event *event) | |
43 | { | |
44 | struct cds_lfht_node *node_ptr; | |
45 | struct ltt_ust_ht_key key; | |
46 | ||
47 | assert(ht); | |
48 | assert(ht->ht); | |
49 | assert(event); | |
50 | ||
51 | key.name = event->attr.name; | |
52 | key.filter = (struct lttng_filter_bytecode *) event->filter; | |
53 | key.loglevel = event->attr.loglevel; | |
4031e53e | 54 | key.exclusion = event->exclusion; |
18eace3b DG |
55 | |
56 | node_ptr = cds_lfht_add_unique(ht->ht, | |
57 | ht->hash_fct(event->node.key, lttng_ht_seed), | |
58 | trace_ust_ht_match_event, &key, &event->node.node); | |
59 | assert(node_ptr == &event->node.node); | |
60 | } | |
61 | ||
54d01ffb | 62 | /* |
7a3d1328 | 63 | * Disable kernel tracepoint event for a channel from the kernel session. |
54d01ffb | 64 | */ |
d0ae4ea8 | 65 | int event_kernel_disable_event(struct ltt_kernel_channel *kchan, |
d3a56674 | 66 | char *event_name) |
54d01ffb DG |
67 | { |
68 | int ret; | |
69 | struct ltt_kernel_event *kevent; | |
70 | ||
0525e9ae DG |
71 | assert(kchan); |
72 | ||
d0ae4ea8 MD |
73 | kevent = trace_kernel_get_event_by_name(event_name, kchan, |
74 | LTTNG_EVENT_ALL); | |
54d01ffb | 75 | if (kevent == NULL) { |
f73fabfd | 76 | ret = LTTNG_ERR_NO_EVENT; |
54d01ffb DG |
77 | goto error; |
78 | } | |
79 | ||
80 | ret = kernel_disable_event(kevent); | |
81 | if (ret < 0) { | |
f73fabfd | 82 | ret = LTTNG_ERR_KERN_DISABLE_FAIL; |
54d01ffb DG |
83 | goto error; |
84 | } | |
85 | ||
86 | DBG("Kernel event %s disable for channel %s.", | |
87 | kevent->event->name, kchan->channel->name); | |
88 | ||
f73fabfd | 89 | ret = LTTNG_OK; |
54d01ffb DG |
90 | |
91 | error: | |
92 | return ret; | |
93 | } | |
94 | ||
95 | /* | |
7a3d1328 | 96 | * Disable kernel tracepoint events for a channel from the kernel session. |
54d01ffb | 97 | */ |
d0ae4ea8 MD |
98 | int event_kernel_disable_event_type(struct ltt_kernel_channel *kchan, |
99 | enum lttng_event_type type) | |
54d01ffb DG |
100 | { |
101 | int ret; | |
102 | struct ltt_kernel_event *kevent; | |
103 | ||
0525e9ae DG |
104 | assert(kchan); |
105 | ||
54d01ffb DG |
106 | /* For each event in the kernel session */ |
107 | cds_list_for_each_entry(kevent, &kchan->events_list.head, list) { | |
d0ae4ea8 MD |
108 | if (type != LTTNG_EVENT_ALL && kevent->type != type) |
109 | continue; | |
54d01ffb DG |
110 | ret = kernel_disable_event(kevent); |
111 | if (ret < 0) { | |
112 | /* We continue disabling the rest */ | |
113 | continue; | |
114 | } | |
115 | } | |
f73fabfd | 116 | ret = LTTNG_OK; |
7a3d1328 MD |
117 | return ret; |
118 | } | |
119 | ||
7a3d1328 MD |
120 | /* |
121 | * Disable all kernel event for a channel from the kernel session. | |
122 | */ | |
d0ae4ea8 | 123 | int event_kernel_disable_event_all(struct ltt_kernel_channel *kchan) |
7a3d1328 | 124 | { |
d0ae4ea8 | 125 | return event_kernel_disable_event_type(kchan, LTTNG_EVENT_ALL); |
54d01ffb DG |
126 | } |
127 | ||
128 | /* | |
7a3d1328 | 129 | * Enable kernel tracepoint event for a channel from the kernel session. |
49d21f93 | 130 | * We own filter_expression and filter. |
54d01ffb | 131 | */ |
d0ae4ea8 | 132 | int event_kernel_enable_event(struct ltt_kernel_channel *kchan, |
00a62084 MD |
133 | struct lttng_event *event, char *filter_expression, |
134 | struct lttng_filter_bytecode *filter) | |
54d01ffb DG |
135 | { |
136 | int ret; | |
137 | struct ltt_kernel_event *kevent; | |
138 | ||
0525e9ae DG |
139 | assert(kchan); |
140 | assert(event); | |
141 | ||
00a62084 MD |
142 | kevent = trace_kernel_find_event(event->name, kchan, |
143 | event->type, filter); | |
54d01ffb | 144 | if (kevent == NULL) { |
00a62084 MD |
145 | ret = kernel_create_event(event, kchan, |
146 | filter_expression, filter); | |
a969e101 MD |
147 | /* We have passed ownership */ |
148 | filter_expression = NULL; | |
149 | filter = NULL; | |
54d01ffb | 150 | if (ret < 0) { |
bd29c13d DG |
151 | switch (-ret) { |
152 | case EEXIST: | |
f73fabfd | 153 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
bd29c13d DG |
154 | break; |
155 | case ENOSYS: | |
f73fabfd | 156 | ret = LTTNG_ERR_KERN_EVENT_ENOSYS; |
bd29c13d DG |
157 | break; |
158 | default: | |
f73fabfd | 159 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
bd29c13d | 160 | break; |
d87bfb32 | 161 | } |
7a3d1328 | 162 | goto end; |
54d01ffb DG |
163 | } |
164 | } else if (kevent->enabled == 0) { | |
165 | ret = kernel_enable_event(kevent); | |
166 | if (ret < 0) { | |
f73fabfd | 167 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
7a3d1328 | 168 | goto end; |
54d01ffb | 169 | } |
42224349 DG |
170 | } else { |
171 | /* At this point, the event is considered enabled */ | |
f73fabfd | 172 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
42224349 | 173 | goto end; |
54d01ffb | 174 | } |
42224349 | 175 | |
f73fabfd | 176 | ret = LTTNG_OK; |
7a3d1328 | 177 | end: |
a969e101 MD |
178 | free(filter_expression); |
179 | free(filter); | |
54d01ffb DG |
180 | return ret; |
181 | } | |
182 | ||
7f79d3a1 DG |
183 | /* |
184 | * ============================ | |
185 | * UST : The Ultimate Frontier! | |
186 | * ============================ | |
187 | */ | |
188 | ||
2bdd86d4 MD |
189 | /* |
190 | * Enable UST tracepoint event for a channel from a UST session. | |
49d21f93 | 191 | * We own filter_expression, filter, and exclusion. |
2bdd86d4 | 192 | */ |
7972aab2 | 193 | int event_ust_enable_tracepoint(struct ltt_ust_session *usess, |
025faf73 | 194 | struct ltt_ust_channel *uchan, struct lttng_event *event, |
6b453b5e | 195 | char *filter_expression, |
f1613f52 | 196 | struct lttng_filter_bytecode *filter, |
88f06f15 JG |
197 | struct lttng_event_exclusion *exclusion, |
198 | bool internal_event) | |
2bdd86d4 | 199 | { |
f73fabfd | 200 | int ret = LTTNG_OK, to_create = 0; |
edb67388 DG |
201 | struct ltt_ust_event *uevent; |
202 | ||
0525e9ae DG |
203 | assert(usess); |
204 | assert(uchan); | |
205 | assert(event); | |
206 | ||
18eace3b DG |
207 | rcu_read_lock(); |
208 | ||
025faf73 | 209 | uevent = trace_ust_find_event(uchan->events, event->name, filter, |
10646003 | 210 | event->loglevel, exclusion); |
87c6e328 | 211 | if (!uevent) { |
6b453b5e | 212 | uevent = trace_ust_create_event(event, filter_expression, |
87c6e328 | 213 | filter, exclusion, internal_event); |
49d21f93 MD |
214 | /* We have passed ownership */ |
215 | filter_expression = NULL; | |
216 | filter = NULL; | |
217 | exclusion = NULL; | |
edb67388 | 218 | if (uevent == NULL) { |
95a82664 | 219 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
edb67388 DG |
220 | goto error; |
221 | } | |
025faf73 | 222 | |
fc34caaa | 223 | /* Valid to set it after the goto error since uevent is still NULL */ |
edb67388 DG |
224 | to_create = 1; |
225 | } | |
2bdd86d4 | 226 | |
7f79d3a1 DG |
227 | if (uevent->enabled) { |
228 | /* It's already enabled so everything is OK */ | |
5bcdda4f | 229 | ret = LTTNG_ERR_UST_EVENT_ENABLED; |
7f79d3a1 DG |
230 | goto end; |
231 | } | |
232 | ||
fc34caaa DG |
233 | uevent->enabled = 1; |
234 | ||
7972aab2 DG |
235 | if (to_create) { |
236 | /* Create event on all UST registered apps for session */ | |
237 | ret = ust_app_create_event_glb(usess, uchan, uevent); | |
238 | } else { | |
239 | /* Enable event on all UST registered apps for session */ | |
240 | ret = ust_app_enable_event_glb(usess, uchan, uevent); | |
241 | } | |
48842b30 | 242 | |
7972aab2 DG |
243 | if (ret < 0) { |
244 | if (ret == -LTTNG_UST_ERR_EXIST) { | |
245 | ret = LTTNG_ERR_UST_EVENT_EXIST; | |
246 | goto end; | |
247 | } else { | |
248 | ret = LTTNG_ERR_UST_ENABLE_FAIL; | |
249 | goto error; | |
edb67388 | 250 | } |
2bdd86d4 | 251 | } |
48842b30 | 252 | |
7f79d3a1 | 253 | if (to_create) { |
fc34caaa | 254 | /* Add ltt ust event to channel */ |
18eace3b | 255 | add_unique_ust_event(uchan->events, uevent); |
7f79d3a1 | 256 | } |
edb67388 | 257 | |
7f79d3a1 DG |
258 | DBG("Event UST %s %s in channel %s", uevent->attr.name, |
259 | to_create ? "created" : "enabled", uchan->name); | |
260 | ||
f73fabfd | 261 | ret = LTTNG_OK; |
fc34caaa | 262 | |
fb89d070 | 263 | end: |
18eace3b | 264 | rcu_read_unlock(); |
49d21f93 MD |
265 | free(filter_expression); |
266 | free(filter); | |
267 | free(exclusion); | |
fc34caaa | 268 | return ret; |
edb67388 DG |
269 | |
270 | error: | |
fc34caaa DG |
271 | /* |
272 | * Only destroy event on creation time (not enabling time) because if the | |
273 | * event is found in the channel (to_create == 0), it means that at some | |
274 | * point the enable_event worked and it's thus valid to keep it alive. | |
275 | * Destroying it also implies that we also destroy it's shadow copy to sync | |
276 | * everyone up. | |
277 | */ | |
278 | if (to_create) { | |
279 | /* In this code path, the uevent was not added to the hash table */ | |
280 | trace_ust_destroy_event(uevent); | |
281 | } | |
18eace3b | 282 | rcu_read_unlock(); |
49d21f93 MD |
283 | free(filter_expression); |
284 | free(filter); | |
285 | free(exclusion); | |
2bdd86d4 MD |
286 | return ret; |
287 | } | |
288 | ||
7f79d3a1 DG |
289 | /* |
290 | * Disable UST tracepoint of a channel from a UST session. | |
291 | */ | |
7972aab2 | 292 | int event_ust_disable_tracepoint(struct ltt_ust_session *usess, |
7f79d3a1 | 293 | struct ltt_ust_channel *uchan, char *event_name) |
2bdd86d4 MD |
294 | { |
295 | int ret; | |
7f79d3a1 | 296 | struct ltt_ust_event *uevent; |
18eace3b DG |
297 | struct lttng_ht_node_str *node; |
298 | struct lttng_ht_iter iter; | |
18eace3b | 299 | struct lttng_ht *ht; |
2bdd86d4 | 300 | |
0525e9ae DG |
301 | assert(usess); |
302 | assert(uchan); | |
303 | assert(event_name); | |
304 | ||
18eace3b DG |
305 | ht = uchan->events; |
306 | ||
18eace3b | 307 | rcu_read_lock(); |
025faf73 DG |
308 | |
309 | /* | |
310 | * We use a custom lookup since we need the iterator for the next_duplicate | |
311 | * call in the do while loop below. | |
312 | */ | |
313 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) event_name, lttng_ht_seed), | |
314 | trace_ust_ht_match_event_by_name, event_name, &iter.iter); | |
18eace3b DG |
315 | node = lttng_ht_iter_get_node_str(&iter); |
316 | if (node == NULL) { | |
317 | DBG2("Trace UST event NOT found by name %s", event_name); | |
f73fabfd | 318 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; |
7f79d3a1 | 319 | goto error; |
2bdd86d4 | 320 | } |
7f79d3a1 | 321 | |
18eace3b DG |
322 | do { |
323 | uevent = caa_container_of(node, struct ltt_ust_event, node); | |
025faf73 DG |
324 | assert(uevent); |
325 | ||
18eace3b DG |
326 | if (uevent->enabled == 0) { |
327 | /* It's already disabled so everything is OK */ | |
a1dcaf0f | 328 | goto next; |
7f79d3a1 | 329 | } |
18eace3b | 330 | |
7972aab2 DG |
331 | ret = ust_app_disable_event_glb(usess, uchan, uevent); |
332 | if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) { | |
333 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
18eace3b DG |
334 | goto error; |
335 | } | |
18eace3b DG |
336 | uevent->enabled = 0; |
337 | ||
025faf73 DG |
338 | DBG2("Event UST %s disabled in channel %s", uevent->attr.name, |
339 | uchan->name); | |
340 | ||
a1dcaf0f | 341 | next: |
18eace3b DG |
342 | /* Get next duplicate event by name. */ |
343 | cds_lfht_next_duplicate(ht->ht, trace_ust_ht_match_event_by_name, | |
344 | event_name, &iter.iter); | |
345 | node = lttng_ht_iter_get_node_str(&iter); | |
346 | } while (node); | |
7f79d3a1 | 347 | |
f73fabfd | 348 | ret = LTTNG_OK; |
7f79d3a1 | 349 | |
7f79d3a1 | 350 | error: |
18eace3b | 351 | rcu_read_unlock(); |
7f79d3a1 DG |
352 | return ret; |
353 | } | |
354 | ||
f20baf8e | 355 | /* |
022d91ba | 356 | * Enable all agent event for a given UST session. |
f20baf8e DG |
357 | * |
358 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
359 | */ | |
022d91ba | 360 | int event_agent_enable_all(struct ltt_ust_session *usess, |
fefd409b | 361 | struct agent *agt, struct lttng_event *event, |
51755dc8 | 362 | struct lttng_filter_bytecode *filter ,char *filter_expression) |
f20baf8e DG |
363 | { |
364 | int ret; | |
fefd409b | 365 | struct agent_event *aevent; |
f20baf8e DG |
366 | struct lttng_ht_iter iter; |
367 | ||
368 | assert(usess); | |
369 | ||
022d91ba | 370 | DBG("Event agent enabling ALL events for session %" PRIu64, usess->id); |
f20baf8e | 371 | |
022d91ba | 372 | /* Enable event on agent application through TCP socket. */ |
8404118c | 373 | ret = event_agent_enable(usess, agt, event, filter, filter_expression); |
f20baf8e DG |
374 | if (ret != LTTNG_OK) { |
375 | goto error; | |
376 | } | |
377 | ||
378 | /* Flag every event that they are now enabled. */ | |
379 | rcu_read_lock(); | |
fefd409b | 380 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent, |
f20baf8e | 381 | node.node) { |
fefd409b | 382 | aevent->enabled = 1; |
f20baf8e DG |
383 | } |
384 | rcu_read_unlock(); | |
385 | ||
386 | ret = LTTNG_OK; | |
387 | ||
388 | error: | |
389 | return ret; | |
390 | } | |
391 | ||
392 | /* | |
022d91ba | 393 | * Enable a single agent event for a given UST session. |
f20baf8e DG |
394 | * |
395 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
396 | */ | |
fefd409b DG |
397 | int event_agent_enable(struct ltt_ust_session *usess, |
398 | struct agent *agt, struct lttng_event *event, | |
8404118c JG |
399 | struct lttng_filter_bytecode *filter, |
400 | char *filter_expression) | |
f20baf8e DG |
401 | { |
402 | int ret, created = 0; | |
fefd409b | 403 | struct agent_event *aevent; |
f20baf8e DG |
404 | |
405 | assert(usess); | |
406 | assert(event); | |
fefd409b | 407 | assert(agt); |
f20baf8e | 408 | |
022d91ba | 409 | DBG("Event agent enabling %s for session %" PRIu64 " with loglevel type %d " |
51755dc8 JG |
410 | ", loglevel %d and filter \"%s\"", event->name, |
411 | usess->id, event->loglevel_type, event->loglevel, | |
412 | filter_expression ? filter_expression : "NULL"); | |
f20baf8e | 413 | |
fefd409b DG |
414 | aevent = agent_find_event(event->name, event->loglevel, agt); |
415 | if (!aevent) { | |
51755dc8 JG |
416 | aevent = agent_create_event(event->name, event->loglevel, |
417 | event->loglevel_type, filter, | |
418 | filter_expression); | |
fefd409b | 419 | if (!aevent) { |
f20baf8e DG |
420 | ret = LTTNG_ERR_NOMEM; |
421 | goto error; | |
422 | } | |
423 | created = 1; | |
424 | } | |
425 | ||
426 | /* Already enabled? */ | |
fefd409b | 427 | if (aevent->enabled) { |
f20baf8e DG |
428 | goto end; |
429 | } | |
430 | ||
fefd409b | 431 | ret = agent_enable_event(aevent, agt->domain); |
f20baf8e DG |
432 | if (ret != LTTNG_OK) { |
433 | goto error; | |
434 | } | |
435 | ||
436 | /* If the event was created prior to the enable, add it to the domain. */ | |
437 | if (created) { | |
fefd409b | 438 | agent_add_event(aevent, agt); |
f20baf8e DG |
439 | } |
440 | ||
441 | end: | |
442 | return LTTNG_OK; | |
443 | ||
444 | error: | |
445 | if (created) { | |
fefd409b | 446 | agent_destroy_event(aevent); |
f20baf8e DG |
447 | } |
448 | return ret; | |
449 | } | |
450 | ||
da6c3a50 | 451 | /* |
d1ec8e20 JG |
452 | * Return the default event name associated with the provided UST domain. Return |
453 | * NULL on error. | |
da6c3a50 DG |
454 | */ |
455 | const char *event_get_default_agent_ust_name(enum lttng_domain_type domain) | |
456 | { | |
457 | const char *default_event_name = NULL; | |
458 | ||
0e115563 DG |
459 | switch (domain) { |
460 | case LTTNG_DOMAIN_LOG4J: | |
d1ec8e20 | 461 | default_event_name = DEFAULT_LOG4J_EVENT_NAME; |
0e115563 DG |
462 | break; |
463 | case LTTNG_DOMAIN_JUL: | |
d1ec8e20 | 464 | default_event_name = DEFAULT_JUL_EVENT_NAME; |
0e115563 DG |
465 | break; |
466 | case LTTNG_DOMAIN_PYTHON: | |
e7c82272 | 467 | default_event_name = DEFAULT_PYTHON_EVENT_NAME; |
0e115563 DG |
468 | break; |
469 | default: | |
da6c3a50 DG |
470 | assert(0); |
471 | } | |
472 | ||
473 | return default_event_name; | |
474 | } | |
475 | ||
f20baf8e | 476 | /* |
022d91ba | 477 | * Disable a single agent event for a given UST session. |
f20baf8e DG |
478 | * |
479 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
480 | */ | |
fefd409b DG |
481 | int event_agent_disable(struct ltt_ust_session *usess, struct agent *agt, |
482 | char *event_name) | |
f20baf8e DG |
483 | { |
484 | int ret; | |
fefd409b | 485 | struct agent_event *aevent; |
be6a6276 DG |
486 | struct ltt_ust_event *uevent = NULL; |
487 | struct ltt_ust_channel *uchan = NULL; | |
71aecbf8 | 488 | const char *ust_event_name, *ust_channel_name; |
f20baf8e | 489 | |
fefd409b | 490 | assert(agt); |
f20baf8e DG |
491 | assert(usess); |
492 | assert(event_name); | |
493 | ||
022d91ba | 494 | DBG("Event agent disabling %s for session %" PRIu64, event_name, usess->id); |
f20baf8e | 495 | |
fefd409b DG |
496 | aevent = agent_find_event_by_name(event_name, agt); |
497 | if (!aevent) { | |
f20baf8e DG |
498 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; |
499 | goto error; | |
500 | } | |
501 | ||
502 | /* Already disabled? */ | |
fefd409b | 503 | if (!aevent->enabled) { |
f20baf8e DG |
504 | goto end; |
505 | } | |
506 | ||
71aecbf8 DG |
507 | if (agt->domain == LTTNG_DOMAIN_JUL) { |
508 | ust_channel_name = DEFAULT_JUL_CHANNEL_NAME; | |
509 | } else if (agt->domain == LTTNG_DOMAIN_LOG4J) { | |
510 | ust_channel_name = DEFAULT_LOG4J_CHANNEL_NAME; | |
0e115563 DG |
511 | } else if (agt->domain == LTTNG_DOMAIN_PYTHON) { |
512 | ust_channel_name = DEFAULT_PYTHON_CHANNEL_NAME; | |
71aecbf8 DG |
513 | } else { |
514 | ret = LTTNG_ERR_INVALID; | |
515 | goto error; | |
516 | } | |
517 | ||
be6a6276 DG |
518 | /* |
519 | * Disable it on the UST side. First get the channel reference then find | |
520 | * the event and finally disable it. | |
521 | */ | |
522 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
71aecbf8 | 523 | (char *) ust_channel_name); |
be6a6276 DG |
524 | if (!uchan) { |
525 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
526 | goto error; | |
527 | } | |
528 | ||
da6c3a50 DG |
529 | ust_event_name = event_get_default_agent_ust_name(agt->domain); |
530 | if (!ust_event_name) { | |
531 | ret = LTTNG_ERR_FATAL; | |
532 | goto error; | |
be6a6276 DG |
533 | } |
534 | ||
535 | /* | |
022d91ba | 536 | * The loglevel is hardcoded with 0 here since the agent ust event is set |
be6a6276 | 537 | * with the loglevel type to ALL thus the loglevel stays 0. The event's |
022d91ba | 538 | * filter is the one handling the loglevel for agent. |
be6a6276 | 539 | */ |
da6c3a50 | 540 | uevent = trace_ust_find_event(uchan->events, (char *) ust_event_name, |
fefd409b | 541 | aevent->filter, 0, NULL); |
022d91ba | 542 | /* If the agent event exists, it must be available on the UST side. */ |
be6a6276 DG |
543 | assert(uevent); |
544 | ||
545 | ret = ust_app_disable_event_glb(usess, uchan, uevent); | |
546 | if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) { | |
547 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
548 | goto error; | |
549 | } | |
550 | ||
0dcfcf94 DG |
551 | /* |
552 | * Flag event that it's disabled so the shadow copy on the ust app side | |
553 | * will disable it if an application shows up. | |
554 | */ | |
555 | uevent->enabled = 0; | |
556 | ||
fefd409b | 557 | ret = agent_disable_event(aevent, agt->domain); |
f20baf8e DG |
558 | if (ret != LTTNG_OK) { |
559 | goto error; | |
560 | } | |
561 | ||
562 | end: | |
563 | return LTTNG_OK; | |
564 | ||
565 | error: | |
566 | return ret; | |
567 | } | |
568 | /* | |
022d91ba | 569 | * Disable all agent event for a given UST session. |
f20baf8e DG |
570 | * |
571 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
572 | */ | |
fefd409b DG |
573 | int event_agent_disable_all(struct ltt_ust_session *usess, |
574 | struct agent *agt) | |
f20baf8e | 575 | { |
0dcfcf94 | 576 | int ret; |
fefd409b | 577 | struct agent_event *aevent; |
f20baf8e DG |
578 | struct lttng_ht_iter iter; |
579 | ||
fefd409b | 580 | assert(agt); |
f20baf8e DG |
581 | assert(usess); |
582 | ||
0dcfcf94 DG |
583 | /* |
584 | * Disable event on agent application. Continue to disable all other events | |
585 | * if the * event is not found. | |
586 | */ | |
fefd409b | 587 | ret = event_agent_disable(usess, agt, "*"); |
0dcfcf94 DG |
588 | if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_NOT_FOUND) { |
589 | goto error; | |
f20baf8e DG |
590 | } |
591 | ||
592 | /* Flag every event that they are now enabled. */ | |
593 | rcu_read_lock(); | |
fefd409b | 594 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent, |
f20baf8e | 595 | node.node) { |
0dcfcf94 DG |
596 | if (!aevent->enabled) { |
597 | continue; | |
598 | } | |
599 | ||
600 | ret = event_agent_disable(usess, agt, aevent->name); | |
601 | if (ret != LTTNG_OK) { | |
602 | rcu_read_unlock(); | |
603 | goto error; | |
f20baf8e | 604 | } |
f20baf8e DG |
605 | } |
606 | rcu_read_unlock(); | |
607 | ||
608 | ret = LTTNG_OK; | |
609 | ||
610 | error: | |
611 | return ret; | |
612 | } |