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 | */ |
d0ae4ea8 | 64 | int event_kernel_disable_event(struct ltt_kernel_channel *kchan, |
d3a56674 | 65 | char *event_name) |
54d01ffb DG |
66 | { |
67 | int ret; | |
68 | struct ltt_kernel_event *kevent; | |
69 | ||
0525e9ae DG |
70 | assert(kchan); |
71 | ||
d0ae4ea8 MD |
72 | kevent = trace_kernel_get_event_by_name(event_name, kchan, |
73 | LTTNG_EVENT_ALL); | |
54d01ffb | 74 | if (kevent == NULL) { |
f73fabfd | 75 | ret = LTTNG_ERR_NO_EVENT; |
54d01ffb DG |
76 | goto error; |
77 | } | |
78 | ||
79 | ret = kernel_disable_event(kevent); | |
80 | if (ret < 0) { | |
f73fabfd | 81 | ret = LTTNG_ERR_KERN_DISABLE_FAIL; |
54d01ffb DG |
82 | goto error; |
83 | } | |
84 | ||
85 | DBG("Kernel event %s disable for channel %s.", | |
86 | kevent->event->name, kchan->channel->name); | |
87 | ||
f73fabfd | 88 | ret = LTTNG_OK; |
54d01ffb DG |
89 | |
90 | error: | |
91 | return ret; | |
92 | } | |
93 | ||
94 | /* | |
7a3d1328 | 95 | * Disable kernel tracepoint events for a channel from the kernel session. |
54d01ffb | 96 | */ |
d0ae4ea8 MD |
97 | int event_kernel_disable_event_type(struct ltt_kernel_channel *kchan, |
98 | enum lttng_event_type type) | |
54d01ffb DG |
99 | { |
100 | int ret; | |
101 | struct ltt_kernel_event *kevent; | |
102 | ||
0525e9ae DG |
103 | assert(kchan); |
104 | ||
54d01ffb DG |
105 | /* For each event in the kernel session */ |
106 | cds_list_for_each_entry(kevent, &kchan->events_list.head, list) { | |
d0ae4ea8 MD |
107 | if (type != LTTNG_EVENT_ALL && kevent->type != type) |
108 | continue; | |
54d01ffb DG |
109 | ret = kernel_disable_event(kevent); |
110 | if (ret < 0) { | |
111 | /* We continue disabling the rest */ | |
112 | continue; | |
113 | } | |
114 | } | |
f73fabfd | 115 | ret = LTTNG_OK; |
7a3d1328 MD |
116 | return ret; |
117 | } | |
118 | ||
7a3d1328 MD |
119 | /* |
120 | * Disable all kernel event for a channel from the kernel session. | |
121 | */ | |
d0ae4ea8 | 122 | int event_kernel_disable_event_all(struct ltt_kernel_channel *kchan) |
7a3d1328 | 123 | { |
d0ae4ea8 | 124 | return event_kernel_disable_event_type(kchan, LTTNG_EVENT_ALL); |
54d01ffb DG |
125 | } |
126 | ||
127 | /* | |
7a3d1328 | 128 | * Enable kernel tracepoint event for a channel from the kernel session. |
49d21f93 | 129 | * We own filter_expression and filter. |
54d01ffb | 130 | */ |
d0ae4ea8 | 131 | int event_kernel_enable_event(struct ltt_kernel_channel *kchan, |
00a62084 MD |
132 | struct lttng_event *event, char *filter_expression, |
133 | struct lttng_filter_bytecode *filter) | |
54d01ffb DG |
134 | { |
135 | int ret; | |
136 | struct ltt_kernel_event *kevent; | |
137 | ||
0525e9ae DG |
138 | assert(kchan); |
139 | assert(event); | |
140 | ||
00a62084 MD |
141 | kevent = trace_kernel_find_event(event->name, kchan, |
142 | event->type, filter); | |
54d01ffb | 143 | if (kevent == NULL) { |
00a62084 MD |
144 | ret = kernel_create_event(event, kchan, |
145 | filter_expression, filter); | |
54d01ffb | 146 | if (ret < 0) { |
bd29c13d DG |
147 | switch (-ret) { |
148 | case EEXIST: | |
f73fabfd | 149 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
bd29c13d DG |
150 | break; |
151 | case ENOSYS: | |
f73fabfd | 152 | ret = LTTNG_ERR_KERN_EVENT_ENOSYS; |
bd29c13d DG |
153 | break; |
154 | default: | |
f73fabfd | 155 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
bd29c13d | 156 | break; |
d87bfb32 | 157 | } |
7a3d1328 | 158 | goto end; |
54d01ffb DG |
159 | } |
160 | } else if (kevent->enabled == 0) { | |
161 | ret = kernel_enable_event(kevent); | |
162 | if (ret < 0) { | |
f73fabfd | 163 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
7a3d1328 | 164 | goto end; |
54d01ffb | 165 | } |
42224349 DG |
166 | } else { |
167 | /* At this point, the event is considered enabled */ | |
f73fabfd | 168 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
42224349 | 169 | goto end; |
54d01ffb | 170 | } |
42224349 | 171 | |
f73fabfd | 172 | ret = LTTNG_OK; |
7a3d1328 | 173 | end: |
54d01ffb DG |
174 | return ret; |
175 | } | |
176 | ||
7f79d3a1 DG |
177 | /* |
178 | * ============================ | |
179 | * UST : The Ultimate Frontier! | |
180 | * ============================ | |
181 | */ | |
182 | ||
76d45b40 DG |
183 | /* |
184 | * Enable all UST tracepoints for a channel from a UST session. | |
185 | */ | |
7972aab2 | 186 | int event_ust_enable_all_tracepoints(struct ltt_ust_session *usess, |
6b453b5e JG |
187 | struct ltt_ust_channel *uchan, |
188 | char *filter_expression, | |
189 | struct lttng_filter_bytecode *filter) | |
76d45b40 | 190 | { |
6775595e | 191 | int ret, i, size; |
bec39940 | 192 | struct lttng_ht_iter iter; |
76d45b40 | 193 | struct ltt_ust_event *uevent = NULL; |
7f79d3a1 | 194 | struct lttng_event *events = NULL; |
76d45b40 | 195 | |
0525e9ae DG |
196 | assert(usess); |
197 | assert(uchan); | |
198 | ||
025faf73 DG |
199 | rcu_read_lock(); |
200 | ||
7972aab2 DG |
201 | /* Enable existing events */ |
202 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, | |
203 | node.node) { | |
204 | if (uevent->enabled == 0) { | |
205 | ret = ust_app_enable_event_glb(usess, uchan, uevent); | |
206 | if (ret < 0) { | |
76d45b40 DG |
207 | continue; |
208 | } | |
7972aab2 DG |
209 | uevent->enabled = 1; |
210 | } | |
211 | } | |
76d45b40 | 212 | |
7972aab2 DG |
213 | /* Get all UST available events */ |
214 | size = ust_app_list_events(&events); | |
215 | if (size < 0) { | |
216 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
217 | goto error; | |
218 | } | |
76d45b40 | 219 | |
7972aab2 DG |
220 | for (i = 0; i < size; i++) { |
221 | /* | |
222 | * Check if event exist and if so, continue since it was enable | |
223 | * previously. | |
224 | */ | |
225 | uevent = trace_ust_find_event(uchan->events, events[i].name, filter, | |
10646003 | 226 | events[i].loglevel, NULL); |
7972aab2 | 227 | if (uevent != NULL) { |
76d45b40 DG |
228 | ret = ust_app_enable_event_pid(usess, uchan, uevent, |
229 | events[i].pid); | |
230 | if (ret < 0) { | |
7972aab2 | 231 | if (ret != -LTTNG_UST_ERR_EXIST) { |
f73fabfd | 232 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
7972aab2 | 233 | goto error; |
76d45b40 | 234 | } |
76d45b40 | 235 | } |
7972aab2 DG |
236 | continue; |
237 | } | |
76d45b40 | 238 | |
7972aab2 | 239 | /* Create ust event */ |
6b453b5e JG |
240 | uevent = trace_ust_create_event(&events[i], filter_expression, |
241 | filter, NULL); | |
7972aab2 DG |
242 | if (uevent == NULL) { |
243 | ret = LTTNG_ERR_FATAL; | |
244 | goto error_destroy; | |
76d45b40 DG |
245 | } |
246 | ||
7972aab2 DG |
247 | /* Create event for the specific PID */ |
248 | ret = ust_app_enable_event_pid(usess, uchan, uevent, | |
249 | events[i].pid); | |
250 | if (ret < 0) { | |
251 | if (ret == -LTTNG_UST_ERR_EXIST) { | |
252 | ret = LTTNG_ERR_UST_EVENT_EXIST; | |
253 | goto error; | |
254 | } else { | |
255 | ret = LTTNG_ERR_UST_ENABLE_FAIL; | |
256 | goto error_destroy; | |
257 | } | |
258 | } | |
259 | ||
260 | uevent->enabled = 1; | |
261 | /* Add ltt ust event to channel */ | |
262 | rcu_read_lock(); | |
263 | add_unique_ust_event(uchan->events, uevent); | |
264 | rcu_read_unlock(); | |
76d45b40 | 265 | } |
7972aab2 | 266 | free(events); |
76d45b40 | 267 | |
025faf73 | 268 | rcu_read_unlock(); |
f73fabfd | 269 | return LTTNG_OK; |
76d45b40 | 270 | |
7f79d3a1 | 271 | error_destroy: |
76d45b40 | 272 | trace_ust_destroy_event(uevent); |
7f79d3a1 DG |
273 | |
274 | error: | |
275 | free(events); | |
025faf73 | 276 | rcu_read_unlock(); |
76d45b40 DG |
277 | return ret; |
278 | } | |
279 | ||
2bdd86d4 MD |
280 | /* |
281 | * Enable UST tracepoint event for a channel from a UST session. | |
49d21f93 | 282 | * We own filter_expression, filter, and exclusion. |
2bdd86d4 | 283 | */ |
7972aab2 | 284 | int event_ust_enable_tracepoint(struct ltt_ust_session *usess, |
025faf73 | 285 | struct ltt_ust_channel *uchan, struct lttng_event *event, |
6b453b5e | 286 | char *filter_expression, |
f1613f52 JI |
287 | struct lttng_filter_bytecode *filter, |
288 | struct lttng_event_exclusion *exclusion) | |
2bdd86d4 | 289 | { |
f73fabfd | 290 | int ret = LTTNG_OK, to_create = 0; |
edb67388 DG |
291 | struct ltt_ust_event *uevent; |
292 | ||
0525e9ae DG |
293 | assert(usess); |
294 | assert(uchan); | |
295 | assert(event); | |
296 | ||
18eace3b DG |
297 | rcu_read_lock(); |
298 | ||
025faf73 | 299 | uevent = trace_ust_find_event(uchan->events, event->name, filter, |
10646003 | 300 | event->loglevel, exclusion); |
edb67388 | 301 | if (uevent == NULL) { |
6b453b5e JG |
302 | uevent = trace_ust_create_event(event, filter_expression, |
303 | filter, exclusion); | |
49d21f93 MD |
304 | /* We have passed ownership */ |
305 | filter_expression = NULL; | |
306 | filter = NULL; | |
307 | exclusion = NULL; | |
edb67388 | 308 | if (uevent == NULL) { |
95a82664 | 309 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
edb67388 DG |
310 | goto error; |
311 | } | |
025faf73 | 312 | |
fc34caaa | 313 | /* Valid to set it after the goto error since uevent is still NULL */ |
edb67388 DG |
314 | to_create = 1; |
315 | } | |
2bdd86d4 | 316 | |
7f79d3a1 DG |
317 | if (uevent->enabled) { |
318 | /* It's already enabled so everything is OK */ | |
5bcdda4f | 319 | ret = LTTNG_ERR_UST_EVENT_ENABLED; |
7f79d3a1 DG |
320 | goto end; |
321 | } | |
322 | ||
fc34caaa DG |
323 | uevent->enabled = 1; |
324 | ||
7972aab2 DG |
325 | if (to_create) { |
326 | /* Create event on all UST registered apps for session */ | |
327 | ret = ust_app_create_event_glb(usess, uchan, uevent); | |
328 | } else { | |
329 | /* Enable event on all UST registered apps for session */ | |
330 | ret = ust_app_enable_event_glb(usess, uchan, uevent); | |
331 | } | |
48842b30 | 332 | |
7972aab2 DG |
333 | if (ret < 0) { |
334 | if (ret == -LTTNG_UST_ERR_EXIST) { | |
335 | ret = LTTNG_ERR_UST_EVENT_EXIST; | |
336 | goto end; | |
337 | } else { | |
338 | ret = LTTNG_ERR_UST_ENABLE_FAIL; | |
339 | goto error; | |
edb67388 | 340 | } |
2bdd86d4 | 341 | } |
48842b30 | 342 | |
7f79d3a1 | 343 | if (to_create) { |
fc34caaa | 344 | /* Add ltt ust event to channel */ |
18eace3b | 345 | add_unique_ust_event(uchan->events, uevent); |
7f79d3a1 | 346 | } |
edb67388 | 347 | |
7f79d3a1 DG |
348 | DBG("Event UST %s %s in channel %s", uevent->attr.name, |
349 | to_create ? "created" : "enabled", uchan->name); | |
350 | ||
f73fabfd | 351 | ret = LTTNG_OK; |
fc34caaa | 352 | |
fb89d070 | 353 | end: |
18eace3b | 354 | rcu_read_unlock(); |
49d21f93 MD |
355 | free(filter_expression); |
356 | free(filter); | |
357 | free(exclusion); | |
fc34caaa | 358 | return ret; |
edb67388 DG |
359 | |
360 | error: | |
fc34caaa DG |
361 | /* |
362 | * Only destroy event on creation time (not enabling time) because if the | |
363 | * event is found in the channel (to_create == 0), it means that at some | |
364 | * point the enable_event worked and it's thus valid to keep it alive. | |
365 | * Destroying it also implies that we also destroy it's shadow copy to sync | |
366 | * everyone up. | |
367 | */ | |
368 | if (to_create) { | |
369 | /* In this code path, the uevent was not added to the hash table */ | |
370 | trace_ust_destroy_event(uevent); | |
371 | } | |
18eace3b | 372 | rcu_read_unlock(); |
49d21f93 MD |
373 | free(filter_expression); |
374 | free(filter); | |
375 | free(exclusion); | |
2bdd86d4 MD |
376 | return ret; |
377 | } | |
378 | ||
7f79d3a1 DG |
379 | /* |
380 | * Disable UST tracepoint of a channel from a UST session. | |
381 | */ | |
7972aab2 | 382 | int event_ust_disable_tracepoint(struct ltt_ust_session *usess, |
7f79d3a1 | 383 | struct ltt_ust_channel *uchan, char *event_name) |
2bdd86d4 MD |
384 | { |
385 | int ret; | |
7f79d3a1 | 386 | struct ltt_ust_event *uevent; |
18eace3b DG |
387 | struct lttng_ht_node_str *node; |
388 | struct lttng_ht_iter iter; | |
18eace3b | 389 | struct lttng_ht *ht; |
2bdd86d4 | 390 | |
0525e9ae DG |
391 | assert(usess); |
392 | assert(uchan); | |
393 | assert(event_name); | |
394 | ||
18eace3b DG |
395 | ht = uchan->events; |
396 | ||
18eace3b | 397 | rcu_read_lock(); |
025faf73 DG |
398 | |
399 | /* | |
400 | * We use a custom lookup since we need the iterator for the next_duplicate | |
401 | * call in the do while loop below. | |
402 | */ | |
403 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) event_name, lttng_ht_seed), | |
404 | trace_ust_ht_match_event_by_name, event_name, &iter.iter); | |
18eace3b DG |
405 | node = lttng_ht_iter_get_node_str(&iter); |
406 | if (node == NULL) { | |
407 | DBG2("Trace UST event NOT found by name %s", event_name); | |
f73fabfd | 408 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; |
7f79d3a1 | 409 | goto error; |
2bdd86d4 | 410 | } |
7f79d3a1 | 411 | |
18eace3b DG |
412 | do { |
413 | uevent = caa_container_of(node, struct ltt_ust_event, node); | |
025faf73 DG |
414 | assert(uevent); |
415 | ||
18eace3b DG |
416 | if (uevent->enabled == 0) { |
417 | /* It's already disabled so everything is OK */ | |
a1dcaf0f | 418 | goto next; |
7f79d3a1 | 419 | } |
18eace3b | 420 | |
7972aab2 DG |
421 | ret = ust_app_disable_event_glb(usess, uchan, uevent); |
422 | if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) { | |
423 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
18eace3b DG |
424 | goto error; |
425 | } | |
18eace3b DG |
426 | uevent->enabled = 0; |
427 | ||
025faf73 DG |
428 | DBG2("Event UST %s disabled in channel %s", uevent->attr.name, |
429 | uchan->name); | |
430 | ||
a1dcaf0f | 431 | next: |
18eace3b DG |
432 | /* Get next duplicate event by name. */ |
433 | cds_lfht_next_duplicate(ht->ht, trace_ust_ht_match_event_by_name, | |
434 | event_name, &iter.iter); | |
435 | node = lttng_ht_iter_get_node_str(&iter); | |
436 | } while (node); | |
7f79d3a1 | 437 | |
f73fabfd | 438 | ret = LTTNG_OK; |
7f79d3a1 | 439 | |
7f79d3a1 | 440 | error: |
18eace3b | 441 | rcu_read_unlock(); |
7f79d3a1 DG |
442 | return ret; |
443 | } | |
444 | ||
445 | /* | |
446 | * Disable all UST tracepoints for a channel from a UST session. | |
447 | */ | |
7972aab2 | 448 | int event_ust_disable_all_tracepoints(struct ltt_ust_session *usess, |
7f79d3a1 DG |
449 | struct ltt_ust_channel *uchan) |
450 | { | |
6775595e | 451 | int ret, i, size; |
bec39940 | 452 | struct lttng_ht_iter iter; |
7f79d3a1 DG |
453 | struct ltt_ust_event *uevent = NULL; |
454 | struct lttng_event *events = NULL; | |
455 | ||
0525e9ae DG |
456 | assert(usess); |
457 | assert(uchan); | |
458 | ||
025faf73 DG |
459 | rcu_read_lock(); |
460 | ||
7972aab2 DG |
461 | /* Disabling existing events */ |
462 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, | |
463 | node.node) { | |
464 | if (uevent->enabled == 1) { | |
465 | ret = event_ust_disable_tracepoint(usess, uchan, | |
466 | uevent->attr.name); | |
467 | if (ret < 0) { | |
7f79d3a1 DG |
468 | continue; |
469 | } | |
470 | } | |
7f79d3a1 | 471 | } |
7972aab2 DG |
472 | |
473 | /* Get all UST available events */ | |
474 | size = ust_app_list_events(&events); | |
475 | if (size < 0) { | |
476 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
7f79d3a1 DG |
477 | goto error; |
478 | } | |
479 | ||
7972aab2 DG |
480 | for (i = 0; i < size; i++) { |
481 | ret = event_ust_disable_tracepoint(usess, uchan, | |
482 | events[i].name); | |
483 | if (ret != LTTNG_OK) { | |
484 | /* Continue to disable the rest... */ | |
485 | continue; | |
486 | } | |
487 | } | |
488 | free(events); | |
489 | ||
025faf73 | 490 | rcu_read_unlock(); |
f73fabfd | 491 | return LTTNG_OK; |
7f79d3a1 DG |
492 | |
493 | error: | |
494 | free(events); | |
025faf73 | 495 | rcu_read_unlock(); |
2bdd86d4 MD |
496 | return ret; |
497 | } | |
f20baf8e DG |
498 | |
499 | /* | |
022d91ba | 500 | * Enable all agent event for a given UST session. |
f20baf8e DG |
501 | * |
502 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
503 | */ | |
022d91ba | 504 | int event_agent_enable_all(struct ltt_ust_session *usess, |
fefd409b DG |
505 | struct agent *agt, struct lttng_event *event, |
506 | struct lttng_filter_bytecode *filter) | |
f20baf8e DG |
507 | { |
508 | int ret; | |
fefd409b | 509 | struct agent_event *aevent; |
f20baf8e DG |
510 | struct lttng_ht_iter iter; |
511 | ||
512 | assert(usess); | |
513 | ||
022d91ba | 514 | DBG("Event agent enabling ALL events for session %" PRIu64, usess->id); |
f20baf8e | 515 | |
022d91ba | 516 | /* Enable event on agent application through TCP socket. */ |
fefd409b | 517 | ret = event_agent_enable(usess, agt, event, filter); |
f20baf8e DG |
518 | if (ret != LTTNG_OK) { |
519 | goto error; | |
520 | } | |
521 | ||
522 | /* Flag every event that they are now enabled. */ | |
523 | rcu_read_lock(); | |
fefd409b | 524 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent, |
f20baf8e | 525 | node.node) { |
fefd409b | 526 | aevent->enabled = 1; |
f20baf8e DG |
527 | } |
528 | rcu_read_unlock(); | |
529 | ||
530 | ret = LTTNG_OK; | |
531 | ||
532 | error: | |
533 | return ret; | |
534 | } | |
535 | ||
536 | /* | |
022d91ba | 537 | * Enable a single agent event for a given UST session. |
f20baf8e DG |
538 | * |
539 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
540 | */ | |
fefd409b DG |
541 | int event_agent_enable(struct ltt_ust_session *usess, |
542 | struct agent *agt, struct lttng_event *event, | |
be6a6276 | 543 | struct lttng_filter_bytecode *filter) |
f20baf8e DG |
544 | { |
545 | int ret, created = 0; | |
fefd409b | 546 | struct agent_event *aevent; |
f20baf8e DG |
547 | |
548 | assert(usess); | |
549 | assert(event); | |
fefd409b | 550 | assert(agt); |
f20baf8e | 551 | |
022d91ba | 552 | DBG("Event agent enabling %s for session %" PRIu64 " with loglevel type %d " |
b2064f54 DG |
553 | "and loglevel %d", event->name, usess->id, event->loglevel_type, |
554 | event->loglevel); | |
f20baf8e | 555 | |
fefd409b DG |
556 | aevent = agent_find_event(event->name, event->loglevel, agt); |
557 | if (!aevent) { | |
558 | aevent = agent_create_event(event->name, filter); | |
559 | if (!aevent) { | |
f20baf8e DG |
560 | ret = LTTNG_ERR_NOMEM; |
561 | goto error; | |
562 | } | |
fefd409b DG |
563 | aevent->loglevel = event->loglevel; |
564 | aevent->loglevel_type = event->loglevel_type; | |
f20baf8e DG |
565 | created = 1; |
566 | } | |
567 | ||
568 | /* Already enabled? */ | |
fefd409b | 569 | if (aevent->enabled) { |
f20baf8e DG |
570 | goto end; |
571 | } | |
572 | ||
fefd409b | 573 | ret = agent_enable_event(aevent, agt->domain); |
f20baf8e DG |
574 | if (ret != LTTNG_OK) { |
575 | goto error; | |
576 | } | |
577 | ||
578 | /* If the event was created prior to the enable, add it to the domain. */ | |
579 | if (created) { | |
fefd409b | 580 | agent_add_event(aevent, agt); |
f20baf8e DG |
581 | } |
582 | ||
583 | end: | |
584 | return LTTNG_OK; | |
585 | ||
586 | error: | |
587 | if (created) { | |
fefd409b | 588 | agent_destroy_event(aevent); |
f20baf8e DG |
589 | } |
590 | return ret; | |
591 | } | |
592 | ||
da6c3a50 DG |
593 | /* |
594 | * Return the agent default event name to use by testing if the process is root | |
595 | * or not. Return NULL on error. | |
596 | */ | |
597 | const char *event_get_default_agent_ust_name(enum lttng_domain_type domain) | |
598 | { | |
599 | const char *default_event_name = NULL; | |
600 | ||
0e115563 DG |
601 | switch (domain) { |
602 | case LTTNG_DOMAIN_LOG4J: | |
da6c3a50 | 603 | if (is_root) { |
0e115563 | 604 | default_event_name = DEFAULT_SYS_LOG4J_EVENT_NAME; |
da6c3a50 | 605 | } else { |
0e115563 | 606 | default_event_name = DEFAULT_USER_LOG4J_EVENT_NAME; |
da6c3a50 | 607 | } |
0e115563 DG |
608 | break; |
609 | case LTTNG_DOMAIN_JUL: | |
da6c3a50 | 610 | if (is_root) { |
0e115563 | 611 | default_event_name = DEFAULT_SYS_JUL_EVENT_NAME; |
da6c3a50 | 612 | } else { |
0e115563 | 613 | default_event_name = DEFAULT_USER_JUL_EVENT_NAME; |
da6c3a50 | 614 | } |
0e115563 DG |
615 | break; |
616 | case LTTNG_DOMAIN_PYTHON: | |
617 | default_event_name = DEFAULT_USER_PYTHON_EVENT_NAME; | |
618 | break; | |
619 | default: | |
da6c3a50 DG |
620 | assert(0); |
621 | } | |
622 | ||
623 | return default_event_name; | |
624 | } | |
625 | ||
f20baf8e | 626 | /* |
022d91ba | 627 | * Disable a single agent event for a given UST session. |
f20baf8e DG |
628 | * |
629 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
630 | */ | |
fefd409b DG |
631 | int event_agent_disable(struct ltt_ust_session *usess, struct agent *agt, |
632 | char *event_name) | |
f20baf8e DG |
633 | { |
634 | int ret; | |
fefd409b | 635 | struct agent_event *aevent; |
be6a6276 DG |
636 | struct ltt_ust_event *uevent = NULL; |
637 | struct ltt_ust_channel *uchan = NULL; | |
71aecbf8 | 638 | const char *ust_event_name, *ust_channel_name; |
f20baf8e | 639 | |
fefd409b | 640 | assert(agt); |
f20baf8e DG |
641 | assert(usess); |
642 | assert(event_name); | |
643 | ||
022d91ba | 644 | DBG("Event agent disabling %s for session %" PRIu64, event_name, usess->id); |
f20baf8e | 645 | |
fefd409b DG |
646 | aevent = agent_find_event_by_name(event_name, agt); |
647 | if (!aevent) { | |
f20baf8e DG |
648 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; |
649 | goto error; | |
650 | } | |
651 | ||
652 | /* Already disabled? */ | |
fefd409b | 653 | if (!aevent->enabled) { |
f20baf8e DG |
654 | goto end; |
655 | } | |
656 | ||
71aecbf8 DG |
657 | if (agt->domain == LTTNG_DOMAIN_JUL) { |
658 | ust_channel_name = DEFAULT_JUL_CHANNEL_NAME; | |
659 | } else if (agt->domain == LTTNG_DOMAIN_LOG4J) { | |
660 | ust_channel_name = DEFAULT_LOG4J_CHANNEL_NAME; | |
0e115563 DG |
661 | } else if (agt->domain == LTTNG_DOMAIN_PYTHON) { |
662 | ust_channel_name = DEFAULT_PYTHON_CHANNEL_NAME; | |
71aecbf8 DG |
663 | } else { |
664 | ret = LTTNG_ERR_INVALID; | |
665 | goto error; | |
666 | } | |
667 | ||
be6a6276 DG |
668 | /* |
669 | * Disable it on the UST side. First get the channel reference then find | |
670 | * the event and finally disable it. | |
671 | */ | |
672 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
71aecbf8 | 673 | (char *) ust_channel_name); |
be6a6276 DG |
674 | if (!uchan) { |
675 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
676 | goto error; | |
677 | } | |
678 | ||
da6c3a50 DG |
679 | ust_event_name = event_get_default_agent_ust_name(agt->domain); |
680 | if (!ust_event_name) { | |
681 | ret = LTTNG_ERR_FATAL; | |
682 | goto error; | |
be6a6276 DG |
683 | } |
684 | ||
685 | /* | |
022d91ba | 686 | * The loglevel is hardcoded with 0 here since the agent ust event is set |
be6a6276 | 687 | * with the loglevel type to ALL thus the loglevel stays 0. The event's |
022d91ba | 688 | * filter is the one handling the loglevel for agent. |
be6a6276 | 689 | */ |
da6c3a50 | 690 | uevent = trace_ust_find_event(uchan->events, (char *) ust_event_name, |
fefd409b | 691 | aevent->filter, 0, NULL); |
022d91ba | 692 | /* If the agent event exists, it must be available on the UST side. */ |
be6a6276 DG |
693 | assert(uevent); |
694 | ||
695 | ret = ust_app_disable_event_glb(usess, uchan, uevent); | |
696 | if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) { | |
697 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
698 | goto error; | |
699 | } | |
700 | ||
0dcfcf94 DG |
701 | /* |
702 | * Flag event that it's disabled so the shadow copy on the ust app side | |
703 | * will disable it if an application shows up. | |
704 | */ | |
705 | uevent->enabled = 0; | |
706 | ||
fefd409b | 707 | ret = agent_disable_event(aevent, agt->domain); |
f20baf8e DG |
708 | if (ret != LTTNG_OK) { |
709 | goto error; | |
710 | } | |
711 | ||
712 | end: | |
713 | return LTTNG_OK; | |
714 | ||
715 | error: | |
716 | return ret; | |
717 | } | |
718 | /* | |
022d91ba | 719 | * Disable all agent event for a given UST session. |
f20baf8e DG |
720 | * |
721 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
722 | */ | |
fefd409b DG |
723 | int event_agent_disable_all(struct ltt_ust_session *usess, |
724 | struct agent *agt) | |
f20baf8e | 725 | { |
0dcfcf94 | 726 | int ret; |
fefd409b | 727 | struct agent_event *aevent; |
f20baf8e DG |
728 | struct lttng_ht_iter iter; |
729 | ||
fefd409b | 730 | assert(agt); |
f20baf8e DG |
731 | assert(usess); |
732 | ||
0dcfcf94 DG |
733 | /* |
734 | * Disable event on agent application. Continue to disable all other events | |
735 | * if the * event is not found. | |
736 | */ | |
fefd409b | 737 | ret = event_agent_disable(usess, agt, "*"); |
0dcfcf94 DG |
738 | if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_NOT_FOUND) { |
739 | goto error; | |
f20baf8e DG |
740 | } |
741 | ||
742 | /* Flag every event that they are now enabled. */ | |
743 | rcu_read_lock(); | |
fefd409b | 744 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent, |
f20baf8e | 745 | node.node) { |
0dcfcf94 DG |
746 | if (!aevent->enabled) { |
747 | continue; | |
748 | } | |
749 | ||
750 | ret = event_agent_disable(usess, agt, aevent->name); | |
751 | if (ret != LTTNG_OK) { | |
752 | rcu_read_unlock(); | |
753 | goto error; | |
f20baf8e | 754 | } |
f20baf8e DG |
755 | } |
756 | rcu_read_unlock(); | |
757 | ||
758 | ret = LTTNG_OK; | |
759 | ||
760 | error: | |
761 | return ret; | |
762 | } |