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; | |
b953b8cd PP |
53 | key.loglevel_type = event->attr.loglevel_type; |
54 | key.loglevel_value = event->attr.loglevel; | |
4031e53e | 55 | key.exclusion = event->exclusion; |
18eace3b DG |
56 | |
57 | node_ptr = cds_lfht_add_unique(ht->ht, | |
58 | ht->hash_fct(event->node.key, lttng_ht_seed), | |
59 | trace_ust_ht_match_event, &key, &event->node.node); | |
60 | assert(node_ptr == &event->node.node); | |
61 | } | |
62 | ||
54d01ffb | 63 | /* |
9550ee81 JR |
64 | * Disable kernel tracepoint events for a channel from the kernel session of |
65 | * a specified event_name and event type. | |
66 | * On type LTTNG_EVENT_ALL all events with event_name are disabled. | |
67 | * If event_name is NULL all events of the specified type are disabled. | |
54d01ffb | 68 | */ |
d0ae4ea8 | 69 | int event_kernel_disable_event(struct ltt_kernel_channel *kchan, |
9550ee81 | 70 | char *event_name, enum lttng_event_type type) |
54d01ffb | 71 | { |
9550ee81 | 72 | int ret, error = 0, found = 0; |
54d01ffb DG |
73 | struct ltt_kernel_event *kevent; |
74 | ||
0525e9ae DG |
75 | assert(kchan); |
76 | ||
54d01ffb DG |
77 | /* For each event in the kernel session */ |
78 | cds_list_for_each_entry(kevent, &kchan->events_list.head, list) { | |
d0ae4ea8 MD |
79 | if (type != LTTNG_EVENT_ALL && kevent->type != type) |
80 | continue; | |
9550ee81 JR |
81 | if (event_name != NULL && strcmp(event_name, kevent->event->name)) { |
82 | continue; | |
83 | } | |
84 | found++; | |
54d01ffb DG |
85 | ret = kernel_disable_event(kevent); |
86 | if (ret < 0) { | |
9550ee81 | 87 | error = 1; |
54d01ffb DG |
88 | continue; |
89 | } | |
90 | } | |
9550ee81 JR |
91 | DBG("Disable kernel event: found %d events with name: %s and type: %d", |
92 | found, event_name ? event_name : "NULL", type); | |
7a3d1328 | 93 | |
9550ee81 JR |
94 | if (event_name != NULL && !found) { |
95 | ret = LTTNG_ERR_NO_EVENT; | |
96 | } else { | |
97 | ret = error ? LTTNG_ERR_KERN_DISABLE_FAIL : LTTNG_OK; | |
98 | } | |
99 | ||
100 | return ret; | |
54d01ffb DG |
101 | } |
102 | ||
103 | /* | |
7a3d1328 | 104 | * Enable kernel tracepoint event for a channel from the kernel session. |
49d21f93 | 105 | * We own filter_expression and filter. |
54d01ffb | 106 | */ |
d0ae4ea8 | 107 | int event_kernel_enable_event(struct ltt_kernel_channel *kchan, |
00a62084 MD |
108 | struct lttng_event *event, char *filter_expression, |
109 | struct lttng_filter_bytecode *filter) | |
54d01ffb DG |
110 | { |
111 | int ret; | |
112 | struct ltt_kernel_event *kevent; | |
113 | ||
0525e9ae DG |
114 | assert(kchan); |
115 | assert(event); | |
116 | ||
00a62084 MD |
117 | kevent = trace_kernel_find_event(event->name, kchan, |
118 | event->type, filter); | |
54d01ffb | 119 | if (kevent == NULL) { |
00a62084 MD |
120 | ret = kernel_create_event(event, kchan, |
121 | filter_expression, filter); | |
a969e101 MD |
122 | /* We have passed ownership */ |
123 | filter_expression = NULL; | |
124 | filter = NULL; | |
54d01ffb | 125 | if (ret < 0) { |
bd29c13d DG |
126 | switch (-ret) { |
127 | case EEXIST: | |
f73fabfd | 128 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
bd29c13d DG |
129 | break; |
130 | case ENOSYS: | |
f73fabfd | 131 | ret = LTTNG_ERR_KERN_EVENT_ENOSYS; |
bd29c13d DG |
132 | break; |
133 | default: | |
f73fabfd | 134 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
bd29c13d | 135 | break; |
d87bfb32 | 136 | } |
7a3d1328 | 137 | goto end; |
54d01ffb DG |
138 | } |
139 | } else if (kevent->enabled == 0) { | |
140 | ret = kernel_enable_event(kevent); | |
141 | if (ret < 0) { | |
f73fabfd | 142 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
7a3d1328 | 143 | goto end; |
54d01ffb | 144 | } |
42224349 DG |
145 | } else { |
146 | /* At this point, the event is considered enabled */ | |
f73fabfd | 147 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
42224349 | 148 | goto end; |
54d01ffb | 149 | } |
42224349 | 150 | |
f73fabfd | 151 | ret = LTTNG_OK; |
7a3d1328 | 152 | end: |
a969e101 MD |
153 | free(filter_expression); |
154 | free(filter); | |
54d01ffb DG |
155 | return ret; |
156 | } | |
157 | ||
7f79d3a1 DG |
158 | /* |
159 | * ============================ | |
160 | * UST : The Ultimate Frontier! | |
161 | * ============================ | |
162 | */ | |
163 | ||
2bdd86d4 MD |
164 | /* |
165 | * Enable UST tracepoint event for a channel from a UST session. | |
49d21f93 | 166 | * We own filter_expression, filter, and exclusion. |
2bdd86d4 | 167 | */ |
7972aab2 | 168 | int event_ust_enable_tracepoint(struct ltt_ust_session *usess, |
025faf73 | 169 | struct ltt_ust_channel *uchan, struct lttng_event *event, |
6b453b5e | 170 | char *filter_expression, |
f1613f52 | 171 | struct lttng_filter_bytecode *filter, |
88f06f15 JG |
172 | struct lttng_event_exclusion *exclusion, |
173 | bool internal_event) | |
2bdd86d4 | 174 | { |
f73fabfd | 175 | int ret = LTTNG_OK, to_create = 0; |
edb67388 DG |
176 | struct ltt_ust_event *uevent; |
177 | ||
0525e9ae DG |
178 | assert(usess); |
179 | assert(uchan); | |
180 | assert(event); | |
181 | ||
18eace3b DG |
182 | rcu_read_lock(); |
183 | ||
025faf73 | 184 | uevent = trace_ust_find_event(uchan->events, event->name, filter, |
b953b8cd | 185 | event->loglevel_type, event->loglevel, exclusion); |
87c6e328 | 186 | if (!uevent) { |
6b453b5e | 187 | uevent = trace_ust_create_event(event, filter_expression, |
87c6e328 | 188 | filter, exclusion, internal_event); |
49d21f93 MD |
189 | /* We have passed ownership */ |
190 | filter_expression = NULL; | |
191 | filter = NULL; | |
192 | exclusion = NULL; | |
edb67388 | 193 | if (uevent == NULL) { |
95a82664 | 194 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
edb67388 DG |
195 | goto error; |
196 | } | |
025faf73 | 197 | |
fc34caaa | 198 | /* Valid to set it after the goto error since uevent is still NULL */ |
edb67388 DG |
199 | to_create = 1; |
200 | } | |
2bdd86d4 | 201 | |
7f79d3a1 DG |
202 | if (uevent->enabled) { |
203 | /* It's already enabled so everything is OK */ | |
5bcdda4f | 204 | ret = LTTNG_ERR_UST_EVENT_ENABLED; |
7f79d3a1 DG |
205 | goto end; |
206 | } | |
207 | ||
fc34caaa DG |
208 | uevent->enabled = 1; |
209 | ||
7972aab2 DG |
210 | if (to_create) { |
211 | /* Create event on all UST registered apps for session */ | |
212 | ret = ust_app_create_event_glb(usess, uchan, uevent); | |
213 | } else { | |
214 | /* Enable event on all UST registered apps for session */ | |
215 | ret = ust_app_enable_event_glb(usess, uchan, uevent); | |
216 | } | |
48842b30 | 217 | |
7972aab2 DG |
218 | if (ret < 0) { |
219 | if (ret == -LTTNG_UST_ERR_EXIST) { | |
220 | ret = LTTNG_ERR_UST_EVENT_EXIST; | |
221 | goto end; | |
222 | } else { | |
223 | ret = LTTNG_ERR_UST_ENABLE_FAIL; | |
224 | goto error; | |
edb67388 | 225 | } |
2bdd86d4 | 226 | } |
48842b30 | 227 | |
7f79d3a1 | 228 | if (to_create) { |
fc34caaa | 229 | /* Add ltt ust event to channel */ |
18eace3b | 230 | add_unique_ust_event(uchan->events, uevent); |
7f79d3a1 | 231 | } |
edb67388 | 232 | |
7f79d3a1 DG |
233 | DBG("Event UST %s %s in channel %s", uevent->attr.name, |
234 | to_create ? "created" : "enabled", uchan->name); | |
235 | ||
f73fabfd | 236 | ret = LTTNG_OK; |
fc34caaa | 237 | |
fb89d070 | 238 | end: |
18eace3b | 239 | rcu_read_unlock(); |
49d21f93 MD |
240 | free(filter_expression); |
241 | free(filter); | |
242 | free(exclusion); | |
fc34caaa | 243 | return ret; |
edb67388 DG |
244 | |
245 | error: | |
fc34caaa DG |
246 | /* |
247 | * Only destroy event on creation time (not enabling time) because if the | |
248 | * event is found in the channel (to_create == 0), it means that at some | |
249 | * point the enable_event worked and it's thus valid to keep it alive. | |
250 | * Destroying it also implies that we also destroy it's shadow copy to sync | |
251 | * everyone up. | |
252 | */ | |
253 | if (to_create) { | |
254 | /* In this code path, the uevent was not added to the hash table */ | |
255 | trace_ust_destroy_event(uevent); | |
256 | } | |
18eace3b | 257 | rcu_read_unlock(); |
49d21f93 MD |
258 | free(filter_expression); |
259 | free(filter); | |
260 | free(exclusion); | |
2bdd86d4 MD |
261 | return ret; |
262 | } | |
263 | ||
7f79d3a1 DG |
264 | /* |
265 | * Disable UST tracepoint of a channel from a UST session. | |
266 | */ | |
7972aab2 | 267 | int event_ust_disable_tracepoint(struct ltt_ust_session *usess, |
7f79d3a1 | 268 | struct ltt_ust_channel *uchan, char *event_name) |
2bdd86d4 MD |
269 | { |
270 | int ret; | |
7f79d3a1 | 271 | struct ltt_ust_event *uevent; |
18eace3b DG |
272 | struct lttng_ht_node_str *node; |
273 | struct lttng_ht_iter iter; | |
18eace3b | 274 | struct lttng_ht *ht; |
2bdd86d4 | 275 | |
0525e9ae DG |
276 | assert(usess); |
277 | assert(uchan); | |
278 | assert(event_name); | |
279 | ||
18eace3b DG |
280 | ht = uchan->events; |
281 | ||
18eace3b | 282 | rcu_read_lock(); |
025faf73 DG |
283 | |
284 | /* | |
285 | * We use a custom lookup since we need the iterator for the next_duplicate | |
286 | * call in the do while loop below. | |
287 | */ | |
288 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) event_name, lttng_ht_seed), | |
289 | trace_ust_ht_match_event_by_name, event_name, &iter.iter); | |
18eace3b DG |
290 | node = lttng_ht_iter_get_node_str(&iter); |
291 | if (node == NULL) { | |
292 | DBG2("Trace UST event NOT found by name %s", event_name); | |
f73fabfd | 293 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; |
7f79d3a1 | 294 | goto error; |
2bdd86d4 | 295 | } |
7f79d3a1 | 296 | |
18eace3b DG |
297 | do { |
298 | uevent = caa_container_of(node, struct ltt_ust_event, node); | |
025faf73 DG |
299 | assert(uevent); |
300 | ||
18eace3b DG |
301 | if (uevent->enabled == 0) { |
302 | /* It's already disabled so everything is OK */ | |
a1dcaf0f | 303 | goto next; |
7f79d3a1 | 304 | } |
18eace3b | 305 | |
7972aab2 DG |
306 | ret = ust_app_disable_event_glb(usess, uchan, uevent); |
307 | if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) { | |
308 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
18eace3b DG |
309 | goto error; |
310 | } | |
18eace3b DG |
311 | uevent->enabled = 0; |
312 | ||
025faf73 DG |
313 | DBG2("Event UST %s disabled in channel %s", uevent->attr.name, |
314 | uchan->name); | |
315 | ||
a1dcaf0f | 316 | next: |
18eace3b DG |
317 | /* Get next duplicate event by name. */ |
318 | cds_lfht_next_duplicate(ht->ht, trace_ust_ht_match_event_by_name, | |
319 | event_name, &iter.iter); | |
320 | node = lttng_ht_iter_get_node_str(&iter); | |
321 | } while (node); | |
7f79d3a1 | 322 | |
f73fabfd | 323 | ret = LTTNG_OK; |
7f79d3a1 | 324 | |
7f79d3a1 | 325 | error: |
18eace3b | 326 | rcu_read_unlock(); |
7f79d3a1 DG |
327 | return ret; |
328 | } | |
329 | ||
b1e7fe2d JR |
330 | /* |
331 | * Disable all UST tracepoints for a channel from a UST session. | |
332 | */ | |
333 | int event_ust_disable_all_tracepoints(struct ltt_ust_session *usess, | |
334 | struct ltt_ust_channel *uchan) | |
335 | { | |
3e81c0f2 | 336 | int ret, i, size, error = 0; |
b1e7fe2d JR |
337 | struct lttng_ht_iter iter; |
338 | struct ltt_ust_event *uevent = NULL; | |
339 | struct lttng_event *events = NULL; | |
340 | ||
341 | assert(usess); | |
342 | assert(uchan); | |
343 | ||
344 | rcu_read_lock(); | |
345 | ||
346 | /* Disabling existing events */ | |
347 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, | |
348 | node.node) { | |
349 | if (uevent->enabled == 1) { | |
350 | ret = event_ust_disable_tracepoint(usess, uchan, | |
351 | uevent->attr.name); | |
352 | if (ret < 0) { | |
3e81c0f2 | 353 | error = LTTNG_ERR_UST_DISABLE_FAIL; |
b1e7fe2d JR |
354 | continue; |
355 | } | |
356 | } | |
357 | } | |
358 | ||
359 | /* Get all UST available events */ | |
360 | size = ust_app_list_events(&events); | |
361 | if (size < 0) { | |
362 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
363 | goto error; | |
364 | } | |
365 | ||
366 | for (i = 0; i < size; i++) { | |
367 | ret = event_ust_disable_tracepoint(usess, uchan, | |
368 | events[i].name); | |
3e81c0f2 | 369 | if (ret < 0) { |
b1e7fe2d | 370 | /* Continue to disable the rest... */ |
3e81c0f2 | 371 | error = LTTNG_ERR_UST_DISABLE_FAIL; |
b1e7fe2d JR |
372 | continue; |
373 | } | |
374 | } | |
375 | ||
3e81c0f2 | 376 | ret = error ? error : LTTNG_OK; |
b1e7fe2d JR |
377 | error: |
378 | rcu_read_unlock(); | |
379 | free(events); | |
380 | return ret; | |
381 | } | |
382 | ||
f20baf8e | 383 | /* |
022d91ba | 384 | * Enable all agent event for a given UST session. |
f20baf8e DG |
385 | * |
386 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
387 | */ | |
022d91ba | 388 | int event_agent_enable_all(struct ltt_ust_session *usess, |
fefd409b | 389 | struct agent *agt, struct lttng_event *event, |
51755dc8 | 390 | struct lttng_filter_bytecode *filter ,char *filter_expression) |
f20baf8e DG |
391 | { |
392 | int ret; | |
fefd409b | 393 | struct agent_event *aevent; |
f20baf8e DG |
394 | struct lttng_ht_iter iter; |
395 | ||
396 | assert(usess); | |
397 | ||
022d91ba | 398 | DBG("Event agent enabling ALL events for session %" PRIu64, usess->id); |
f20baf8e | 399 | |
022d91ba | 400 | /* Enable event on agent application through TCP socket. */ |
8404118c | 401 | ret = event_agent_enable(usess, agt, event, filter, filter_expression); |
f20baf8e DG |
402 | if (ret != LTTNG_OK) { |
403 | goto error; | |
404 | } | |
405 | ||
406 | /* Flag every event that they are now enabled. */ | |
407 | rcu_read_lock(); | |
fefd409b | 408 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent, |
f20baf8e | 409 | node.node) { |
fefd409b | 410 | aevent->enabled = 1; |
f20baf8e DG |
411 | } |
412 | rcu_read_unlock(); | |
413 | ||
414 | ret = LTTNG_OK; | |
415 | ||
416 | error: | |
417 | return ret; | |
418 | } | |
419 | ||
420 | /* | |
022d91ba | 421 | * Enable a single agent event for a given UST session. |
f20baf8e DG |
422 | * |
423 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
424 | */ | |
fefd409b DG |
425 | int event_agent_enable(struct ltt_ust_session *usess, |
426 | struct agent *agt, struct lttng_event *event, | |
8404118c JG |
427 | struct lttng_filter_bytecode *filter, |
428 | char *filter_expression) | |
f20baf8e DG |
429 | { |
430 | int ret, created = 0; | |
fefd409b | 431 | struct agent_event *aevent; |
f20baf8e DG |
432 | |
433 | assert(usess); | |
434 | assert(event); | |
fefd409b | 435 | assert(agt); |
f20baf8e | 436 | |
022d91ba | 437 | DBG("Event agent enabling %s for session %" PRIu64 " with loglevel type %d " |
51755dc8 JG |
438 | ", loglevel %d and filter \"%s\"", event->name, |
439 | usess->id, event->loglevel_type, event->loglevel, | |
440 | filter_expression ? filter_expression : "NULL"); | |
f20baf8e | 441 | |
a9319624 PP |
442 | aevent = agent_find_event(event->name, event->loglevel_type, |
443 | event->loglevel, agt); | |
fefd409b | 444 | if (!aevent) { |
a9319624 PP |
445 | aevent = agent_create_event(event->name, event->loglevel_type, |
446 | event->loglevel, filter, | |
51755dc8 | 447 | filter_expression); |
fefd409b | 448 | if (!aevent) { |
f20baf8e DG |
449 | ret = LTTNG_ERR_NOMEM; |
450 | goto error; | |
451 | } | |
452 | created = 1; | |
453 | } | |
454 | ||
455 | /* Already enabled? */ | |
fefd409b | 456 | if (aevent->enabled) { |
f20baf8e DG |
457 | goto end; |
458 | } | |
459 | ||
fefd409b | 460 | ret = agent_enable_event(aevent, agt->domain); |
f20baf8e DG |
461 | if (ret != LTTNG_OK) { |
462 | goto error; | |
463 | } | |
464 | ||
465 | /* If the event was created prior to the enable, add it to the domain. */ | |
466 | if (created) { | |
fefd409b | 467 | agent_add_event(aevent, agt); |
f20baf8e DG |
468 | } |
469 | ||
470 | end: | |
471 | return LTTNG_OK; | |
472 | ||
473 | error: | |
474 | if (created) { | |
fefd409b | 475 | agent_destroy_event(aevent); |
f20baf8e DG |
476 | } |
477 | return ret; | |
478 | } | |
479 | ||
da6c3a50 | 480 | /* |
d1ec8e20 JG |
481 | * Return the default event name associated with the provided UST domain. Return |
482 | * NULL on error. | |
da6c3a50 DG |
483 | */ |
484 | const char *event_get_default_agent_ust_name(enum lttng_domain_type domain) | |
485 | { | |
486 | const char *default_event_name = NULL; | |
487 | ||
0e115563 DG |
488 | switch (domain) { |
489 | case LTTNG_DOMAIN_LOG4J: | |
d1ec8e20 | 490 | default_event_name = DEFAULT_LOG4J_EVENT_NAME; |
0e115563 DG |
491 | break; |
492 | case LTTNG_DOMAIN_JUL: | |
d1ec8e20 | 493 | default_event_name = DEFAULT_JUL_EVENT_NAME; |
0e115563 DG |
494 | break; |
495 | case LTTNG_DOMAIN_PYTHON: | |
e7c82272 | 496 | default_event_name = DEFAULT_PYTHON_EVENT_NAME; |
0e115563 DG |
497 | break; |
498 | default: | |
da6c3a50 DG |
499 | assert(0); |
500 | } | |
501 | ||
502 | return default_event_name; | |
503 | } | |
504 | ||
f20baf8e | 505 | /* |
e261a6cc | 506 | * Disable a given agent event for a given UST session. |
f20baf8e | 507 | * |
e261a6cc | 508 | * Must be called with the RCU read lock held. |
f20baf8e DG |
509 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. |
510 | */ | |
e261a6cc PP |
511 | static int event_agent_disable_one(struct ltt_ust_session *usess, |
512 | struct agent *agt, struct agent_event *aevent) | |
f20baf8e DG |
513 | { |
514 | int ret; | |
be6a6276 DG |
515 | struct ltt_ust_event *uevent = NULL; |
516 | struct ltt_ust_channel *uchan = NULL; | |
71aecbf8 | 517 | const char *ust_event_name, *ust_channel_name; |
f20baf8e | 518 | |
fefd409b | 519 | assert(agt); |
f20baf8e | 520 | assert(usess); |
e261a6cc | 521 | assert(aevent); |
f20baf8e | 522 | |
e261a6cc PP |
523 | DBG("Event agent disabling %s (loglevel type %d, loglevel value %d) for session %" PRIu64, |
524 | aevent->name, aevent->loglevel_type, aevent->loglevel_value, | |
525 | usess->id); | |
f20baf8e DG |
526 | |
527 | /* Already disabled? */ | |
fefd409b | 528 | if (!aevent->enabled) { |
f20baf8e DG |
529 | goto end; |
530 | } | |
531 | ||
71aecbf8 DG |
532 | if (agt->domain == LTTNG_DOMAIN_JUL) { |
533 | ust_channel_name = DEFAULT_JUL_CHANNEL_NAME; | |
534 | } else if (agt->domain == LTTNG_DOMAIN_LOG4J) { | |
535 | ust_channel_name = DEFAULT_LOG4J_CHANNEL_NAME; | |
0e115563 DG |
536 | } else if (agt->domain == LTTNG_DOMAIN_PYTHON) { |
537 | ust_channel_name = DEFAULT_PYTHON_CHANNEL_NAME; | |
71aecbf8 DG |
538 | } else { |
539 | ret = LTTNG_ERR_INVALID; | |
540 | goto error; | |
541 | } | |
542 | ||
be6a6276 DG |
543 | /* |
544 | * Disable it on the UST side. First get the channel reference then find | |
545 | * the event and finally disable it. | |
546 | */ | |
547 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
71aecbf8 | 548 | (char *) ust_channel_name); |
be6a6276 DG |
549 | if (!uchan) { |
550 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
551 | goto error; | |
552 | } | |
553 | ||
da6c3a50 DG |
554 | ust_event_name = event_get_default_agent_ust_name(agt->domain); |
555 | if (!ust_event_name) { | |
556 | ret = LTTNG_ERR_FATAL; | |
557 | goto error; | |
be6a6276 DG |
558 | } |
559 | ||
560 | /* | |
b953b8cd PP |
561 | * Agent UST event has its loglevel type forced to |
562 | * LTTNG_UST_LOGLEVEL_ALL. The actual loglevel type/value filtering | |
563 | * happens thanks to an UST filter. The following -1 is actually | |
564 | * ignored since the type is LTTNG_UST_LOGLEVEL_ALL. | |
be6a6276 | 565 | */ |
da6c3a50 | 566 | uevent = trace_ust_find_event(uchan->events, (char *) ust_event_name, |
b953b8cd | 567 | aevent->filter, LTTNG_UST_LOGLEVEL_ALL, -1, NULL); |
022d91ba | 568 | /* If the agent event exists, it must be available on the UST side. */ |
be6a6276 DG |
569 | assert(uevent); |
570 | ||
571 | ret = ust_app_disable_event_glb(usess, uchan, uevent); | |
572 | if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) { | |
573 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
574 | goto error; | |
575 | } | |
576 | ||
0dcfcf94 DG |
577 | /* |
578 | * Flag event that it's disabled so the shadow copy on the ust app side | |
579 | * will disable it if an application shows up. | |
580 | */ | |
581 | uevent->enabled = 0; | |
582 | ||
fefd409b | 583 | ret = agent_disable_event(aevent, agt->domain); |
f20baf8e DG |
584 | if (ret != LTTNG_OK) { |
585 | goto error; | |
586 | } | |
587 | ||
588 | end: | |
589 | return LTTNG_OK; | |
590 | ||
591 | error: | |
592 | return ret; | |
593 | } | |
e261a6cc PP |
594 | |
595 | /* | |
596 | * Disable all agent events matching a given name for a given UST session. | |
597 | * | |
598 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
599 | */ | |
600 | int event_agent_disable(struct ltt_ust_session *usess, struct agent *agt, | |
601 | char *event_name) | |
602 | { | |
603 | int ret = LTTNG_OK; | |
604 | struct agent_event *aevent; | |
605 | struct lttng_ht_iter iter; | |
606 | struct lttng_ht_node_str *node; | |
607 | ||
608 | assert(agt); | |
609 | assert(usess); | |
610 | assert(event_name); | |
611 | ||
612 | DBG("Event agent disabling %s (all loglevels) for session %" PRIu64, event_name, usess->id); | |
613 | ||
614 | rcu_read_lock(); | |
615 | agent_find_events_by_name(event_name, agt, &iter); | |
616 | node = lttng_ht_iter_get_node_str(&iter); | |
617 | ||
618 | if (node == NULL) { | |
619 | DBG2("Event agent NOT found by name %s", event_name); | |
620 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
621 | goto end; | |
622 | } | |
623 | ||
624 | do { | |
625 | aevent = caa_container_of(node, struct agent_event, node); | |
626 | ret = event_agent_disable_one(usess, agt, aevent); | |
627 | ||
628 | if (ret != LTTNG_OK) { | |
629 | goto end; | |
630 | } | |
631 | ||
632 | /* Get next duplicate agent event by name. */ | |
633 | agent_event_next_duplicate(event_name, agt, &iter); | |
634 | node = lttng_ht_iter_get_node_str(&iter); | |
635 | } while (node); | |
636 | end: | |
637 | rcu_read_unlock(); | |
638 | return ret; | |
639 | } | |
f20baf8e | 640 | /* |
022d91ba | 641 | * Disable all agent event for a given UST session. |
f20baf8e DG |
642 | * |
643 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
644 | */ | |
fefd409b DG |
645 | int event_agent_disable_all(struct ltt_ust_session *usess, |
646 | struct agent *agt) | |
f20baf8e | 647 | { |
0dcfcf94 | 648 | int ret; |
fefd409b | 649 | struct agent_event *aevent; |
f20baf8e DG |
650 | struct lttng_ht_iter iter; |
651 | ||
fefd409b | 652 | assert(agt); |
f20baf8e DG |
653 | assert(usess); |
654 | ||
0dcfcf94 DG |
655 | /* |
656 | * Disable event on agent application. Continue to disable all other events | |
657 | * if the * event is not found. | |
658 | */ | |
fefd409b | 659 | ret = event_agent_disable(usess, agt, "*"); |
0dcfcf94 DG |
660 | if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_NOT_FOUND) { |
661 | goto error; | |
f20baf8e DG |
662 | } |
663 | ||
b9866e08 | 664 | /* Disable every event. */ |
f20baf8e | 665 | rcu_read_lock(); |
fefd409b | 666 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent, |
f20baf8e | 667 | node.node) { |
0dcfcf94 DG |
668 | if (!aevent->enabled) { |
669 | continue; | |
670 | } | |
671 | ||
672 | ret = event_agent_disable(usess, agt, aevent->name); | |
673 | if (ret != LTTNG_OK) { | |
b9866e08 | 674 | goto error_unlock; |
f20baf8e | 675 | } |
f20baf8e | 676 | } |
f20baf8e DG |
677 | ret = LTTNG_OK; |
678 | ||
b9866e08 JG |
679 | error_unlock: |
680 | rcu_read_unlock(); | |
f20baf8e DG |
681 | error: |
682 | return ret; | |
683 | } |