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 | /* |
7a3d1328 | 64 | * Disable kernel tracepoint event for a channel from the kernel session. |
54d01ffb | 65 | */ |
d0ae4ea8 | 66 | int event_kernel_disable_event(struct ltt_kernel_channel *kchan, |
d3a56674 | 67 | char *event_name) |
54d01ffb DG |
68 | { |
69 | int ret; | |
70 | struct ltt_kernel_event *kevent; | |
71 | ||
0525e9ae DG |
72 | assert(kchan); |
73 | ||
d0ae4ea8 MD |
74 | kevent = trace_kernel_get_event_by_name(event_name, kchan, |
75 | LTTNG_EVENT_ALL); | |
54d01ffb | 76 | if (kevent == NULL) { |
f73fabfd | 77 | ret = LTTNG_ERR_NO_EVENT; |
54d01ffb DG |
78 | goto error; |
79 | } | |
80 | ||
81 | ret = kernel_disable_event(kevent); | |
82 | if (ret < 0) { | |
f73fabfd | 83 | ret = LTTNG_ERR_KERN_DISABLE_FAIL; |
54d01ffb DG |
84 | goto error; |
85 | } | |
86 | ||
87 | DBG("Kernel event %s disable for channel %s.", | |
88 | kevent->event->name, kchan->channel->name); | |
89 | ||
f73fabfd | 90 | ret = LTTNG_OK; |
54d01ffb DG |
91 | |
92 | error: | |
93 | return ret; | |
94 | } | |
95 | ||
96 | /* | |
7a3d1328 | 97 | * Disable kernel tracepoint events for a channel from the kernel session. |
54d01ffb | 98 | */ |
d0ae4ea8 MD |
99 | int event_kernel_disable_event_type(struct ltt_kernel_channel *kchan, |
100 | enum lttng_event_type type) | |
54d01ffb DG |
101 | { |
102 | int ret; | |
103 | struct ltt_kernel_event *kevent; | |
104 | ||
0525e9ae DG |
105 | assert(kchan); |
106 | ||
54d01ffb DG |
107 | /* For each event in the kernel session */ |
108 | cds_list_for_each_entry(kevent, &kchan->events_list.head, list) { | |
d0ae4ea8 MD |
109 | if (type != LTTNG_EVENT_ALL && kevent->type != type) |
110 | continue; | |
54d01ffb DG |
111 | ret = kernel_disable_event(kevent); |
112 | if (ret < 0) { | |
113 | /* We continue disabling the rest */ | |
114 | continue; | |
115 | } | |
116 | } | |
f73fabfd | 117 | ret = LTTNG_OK; |
7a3d1328 MD |
118 | return ret; |
119 | } | |
120 | ||
7a3d1328 MD |
121 | /* |
122 | * Disable all kernel event for a channel from the kernel session. | |
123 | */ | |
d0ae4ea8 | 124 | int event_kernel_disable_event_all(struct ltt_kernel_channel *kchan) |
7a3d1328 | 125 | { |
d0ae4ea8 | 126 | return event_kernel_disable_event_type(kchan, LTTNG_EVENT_ALL); |
54d01ffb DG |
127 | } |
128 | ||
129 | /* | |
7a3d1328 | 130 | * Enable kernel tracepoint event for a channel from the kernel session. |
49d21f93 | 131 | * We own filter_expression and filter. |
54d01ffb | 132 | */ |
d0ae4ea8 | 133 | int event_kernel_enable_event(struct ltt_kernel_channel *kchan, |
00a62084 MD |
134 | struct lttng_event *event, char *filter_expression, |
135 | struct lttng_filter_bytecode *filter) | |
54d01ffb DG |
136 | { |
137 | int ret; | |
138 | struct ltt_kernel_event *kevent; | |
139 | ||
0525e9ae DG |
140 | assert(kchan); |
141 | assert(event); | |
142 | ||
00a62084 MD |
143 | kevent = trace_kernel_find_event(event->name, kchan, |
144 | event->type, filter); | |
54d01ffb | 145 | if (kevent == NULL) { |
00a62084 MD |
146 | ret = kernel_create_event(event, kchan, |
147 | filter_expression, filter); | |
a969e101 MD |
148 | /* We have passed ownership */ |
149 | filter_expression = NULL; | |
150 | filter = NULL; | |
54d01ffb | 151 | if (ret < 0) { |
bd29c13d DG |
152 | switch (-ret) { |
153 | case EEXIST: | |
f73fabfd | 154 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
bd29c13d DG |
155 | break; |
156 | case ENOSYS: | |
f73fabfd | 157 | ret = LTTNG_ERR_KERN_EVENT_ENOSYS; |
bd29c13d DG |
158 | break; |
159 | default: | |
f73fabfd | 160 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
bd29c13d | 161 | break; |
d87bfb32 | 162 | } |
7a3d1328 | 163 | goto end; |
54d01ffb DG |
164 | } |
165 | } else if (kevent->enabled == 0) { | |
166 | ret = kernel_enable_event(kevent); | |
167 | if (ret < 0) { | |
f73fabfd | 168 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
7a3d1328 | 169 | goto end; |
54d01ffb | 170 | } |
42224349 DG |
171 | } else { |
172 | /* At this point, the event is considered enabled */ | |
f73fabfd | 173 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
42224349 | 174 | goto end; |
54d01ffb | 175 | } |
42224349 | 176 | |
f73fabfd | 177 | ret = LTTNG_OK; |
7a3d1328 | 178 | end: |
a969e101 MD |
179 | free(filter_expression); |
180 | free(filter); | |
54d01ffb DG |
181 | return ret; |
182 | } | |
183 | ||
7f79d3a1 DG |
184 | /* |
185 | * ============================ | |
186 | * UST : The Ultimate Frontier! | |
187 | * ============================ | |
188 | */ | |
189 | ||
2bdd86d4 MD |
190 | /* |
191 | * Enable UST tracepoint event for a channel from a UST session. | |
49d21f93 | 192 | * We own filter_expression, filter, and exclusion. |
2bdd86d4 | 193 | */ |
7972aab2 | 194 | int event_ust_enable_tracepoint(struct ltt_ust_session *usess, |
025faf73 | 195 | struct ltt_ust_channel *uchan, struct lttng_event *event, |
6b453b5e | 196 | char *filter_expression, |
f1613f52 | 197 | struct lttng_filter_bytecode *filter, |
88f06f15 JG |
198 | struct lttng_event_exclusion *exclusion, |
199 | bool internal_event) | |
2bdd86d4 | 200 | { |
f73fabfd | 201 | int ret = LTTNG_OK, to_create = 0; |
edb67388 DG |
202 | struct ltt_ust_event *uevent; |
203 | ||
0525e9ae DG |
204 | assert(usess); |
205 | assert(uchan); | |
206 | assert(event); | |
207 | ||
18eace3b DG |
208 | rcu_read_lock(); |
209 | ||
025faf73 | 210 | uevent = trace_ust_find_event(uchan->events, event->name, filter, |
b953b8cd | 211 | event->loglevel_type, event->loglevel, exclusion); |
87c6e328 | 212 | if (!uevent) { |
6b453b5e | 213 | uevent = trace_ust_create_event(event, filter_expression, |
87c6e328 | 214 | filter, exclusion, internal_event); |
49d21f93 MD |
215 | /* We have passed ownership */ |
216 | filter_expression = NULL; | |
217 | filter = NULL; | |
218 | exclusion = NULL; | |
edb67388 | 219 | if (uevent == NULL) { |
95a82664 | 220 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
edb67388 DG |
221 | goto error; |
222 | } | |
025faf73 | 223 | |
fc34caaa | 224 | /* Valid to set it after the goto error since uevent is still NULL */ |
edb67388 DG |
225 | to_create = 1; |
226 | } | |
2bdd86d4 | 227 | |
7f79d3a1 DG |
228 | if (uevent->enabled) { |
229 | /* It's already enabled so everything is OK */ | |
5bcdda4f | 230 | ret = LTTNG_ERR_UST_EVENT_ENABLED; |
7f79d3a1 DG |
231 | goto end; |
232 | } | |
233 | ||
fc34caaa DG |
234 | uevent->enabled = 1; |
235 | ||
7972aab2 DG |
236 | if (to_create) { |
237 | /* Create event on all UST registered apps for session */ | |
238 | ret = ust_app_create_event_glb(usess, uchan, uevent); | |
239 | } else { | |
240 | /* Enable event on all UST registered apps for session */ | |
241 | ret = ust_app_enable_event_glb(usess, uchan, uevent); | |
242 | } | |
48842b30 | 243 | |
7972aab2 DG |
244 | if (ret < 0) { |
245 | if (ret == -LTTNG_UST_ERR_EXIST) { | |
246 | ret = LTTNG_ERR_UST_EVENT_EXIST; | |
247 | goto end; | |
248 | } else { | |
249 | ret = LTTNG_ERR_UST_ENABLE_FAIL; | |
250 | goto error; | |
edb67388 | 251 | } |
2bdd86d4 | 252 | } |
48842b30 | 253 | |
7f79d3a1 | 254 | if (to_create) { |
fc34caaa | 255 | /* Add ltt ust event to channel */ |
18eace3b | 256 | add_unique_ust_event(uchan->events, uevent); |
7f79d3a1 | 257 | } |
edb67388 | 258 | |
7f79d3a1 DG |
259 | DBG("Event UST %s %s in channel %s", uevent->attr.name, |
260 | to_create ? "created" : "enabled", uchan->name); | |
261 | ||
f73fabfd | 262 | ret = LTTNG_OK; |
fc34caaa | 263 | |
fb89d070 | 264 | end: |
18eace3b | 265 | rcu_read_unlock(); |
49d21f93 MD |
266 | free(filter_expression); |
267 | free(filter); | |
268 | free(exclusion); | |
fc34caaa | 269 | return ret; |
edb67388 DG |
270 | |
271 | error: | |
fc34caaa DG |
272 | /* |
273 | * Only destroy event on creation time (not enabling time) because if the | |
274 | * event is found in the channel (to_create == 0), it means that at some | |
275 | * point the enable_event worked and it's thus valid to keep it alive. | |
276 | * Destroying it also implies that we also destroy it's shadow copy to sync | |
277 | * everyone up. | |
278 | */ | |
279 | if (to_create) { | |
280 | /* In this code path, the uevent was not added to the hash table */ | |
281 | trace_ust_destroy_event(uevent); | |
282 | } | |
18eace3b | 283 | rcu_read_unlock(); |
49d21f93 MD |
284 | free(filter_expression); |
285 | free(filter); | |
286 | free(exclusion); | |
2bdd86d4 MD |
287 | return ret; |
288 | } | |
289 | ||
7f79d3a1 DG |
290 | /* |
291 | * Disable UST tracepoint of a channel from a UST session. | |
292 | */ | |
7972aab2 | 293 | int event_ust_disable_tracepoint(struct ltt_ust_session *usess, |
7f79d3a1 | 294 | struct ltt_ust_channel *uchan, char *event_name) |
2bdd86d4 MD |
295 | { |
296 | int ret; | |
7f79d3a1 | 297 | struct ltt_ust_event *uevent; |
18eace3b DG |
298 | struct lttng_ht_node_str *node; |
299 | struct lttng_ht_iter iter; | |
18eace3b | 300 | struct lttng_ht *ht; |
2bdd86d4 | 301 | |
0525e9ae DG |
302 | assert(usess); |
303 | assert(uchan); | |
304 | assert(event_name); | |
305 | ||
18eace3b DG |
306 | ht = uchan->events; |
307 | ||
18eace3b | 308 | rcu_read_lock(); |
025faf73 DG |
309 | |
310 | /* | |
311 | * We use a custom lookup since we need the iterator for the next_duplicate | |
312 | * call in the do while loop below. | |
313 | */ | |
314 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) event_name, lttng_ht_seed), | |
315 | trace_ust_ht_match_event_by_name, event_name, &iter.iter); | |
18eace3b DG |
316 | node = lttng_ht_iter_get_node_str(&iter); |
317 | if (node == NULL) { | |
318 | DBG2("Trace UST event NOT found by name %s", event_name); | |
f73fabfd | 319 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; |
7f79d3a1 | 320 | goto error; |
2bdd86d4 | 321 | } |
7f79d3a1 | 322 | |
18eace3b DG |
323 | do { |
324 | uevent = caa_container_of(node, struct ltt_ust_event, node); | |
025faf73 DG |
325 | assert(uevent); |
326 | ||
18eace3b DG |
327 | if (uevent->enabled == 0) { |
328 | /* It's already disabled so everything is OK */ | |
a1dcaf0f | 329 | goto next; |
7f79d3a1 | 330 | } |
18eace3b | 331 | |
7972aab2 DG |
332 | ret = ust_app_disable_event_glb(usess, uchan, uevent); |
333 | if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) { | |
334 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
18eace3b DG |
335 | goto error; |
336 | } | |
18eace3b DG |
337 | uevent->enabled = 0; |
338 | ||
025faf73 DG |
339 | DBG2("Event UST %s disabled in channel %s", uevent->attr.name, |
340 | uchan->name); | |
341 | ||
a1dcaf0f | 342 | next: |
18eace3b DG |
343 | /* Get next duplicate event by name. */ |
344 | cds_lfht_next_duplicate(ht->ht, trace_ust_ht_match_event_by_name, | |
345 | event_name, &iter.iter); | |
346 | node = lttng_ht_iter_get_node_str(&iter); | |
347 | } while (node); | |
7f79d3a1 | 348 | |
f73fabfd | 349 | ret = LTTNG_OK; |
7f79d3a1 | 350 | |
7f79d3a1 | 351 | error: |
18eace3b | 352 | rcu_read_unlock(); |
7f79d3a1 DG |
353 | return ret; |
354 | } | |
355 | ||
b1e7fe2d JR |
356 | /* |
357 | * Disable all UST tracepoints for a channel from a UST session. | |
358 | */ | |
359 | int event_ust_disable_all_tracepoints(struct ltt_ust_session *usess, | |
360 | struct ltt_ust_channel *uchan) | |
361 | { | |
362 | int ret, i, size; | |
363 | struct lttng_ht_iter iter; | |
364 | struct ltt_ust_event *uevent = NULL; | |
365 | struct lttng_event *events = NULL; | |
366 | ||
367 | assert(usess); | |
368 | assert(uchan); | |
369 | ||
370 | rcu_read_lock(); | |
371 | ||
372 | /* Disabling existing events */ | |
373 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, | |
374 | node.node) { | |
375 | if (uevent->enabled == 1) { | |
376 | ret = event_ust_disable_tracepoint(usess, uchan, | |
377 | uevent->attr.name); | |
378 | if (ret < 0) { | |
379 | continue; | |
380 | } | |
381 | } | |
382 | } | |
383 | ||
384 | /* Get all UST available events */ | |
385 | size = ust_app_list_events(&events); | |
386 | if (size < 0) { | |
387 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
388 | goto error; | |
389 | } | |
390 | ||
391 | for (i = 0; i < size; i++) { | |
392 | ret = event_ust_disable_tracepoint(usess, uchan, | |
393 | events[i].name); | |
394 | if (ret != LTTNG_OK) { | |
395 | /* Continue to disable the rest... */ | |
396 | continue; | |
397 | } | |
398 | } | |
399 | ||
400 | ret = LTTNG_OK; | |
401 | error: | |
402 | rcu_read_unlock(); | |
403 | free(events); | |
404 | return ret; | |
405 | } | |
406 | ||
f20baf8e | 407 | /* |
022d91ba | 408 | * Enable all agent event for a given UST session. |
f20baf8e DG |
409 | * |
410 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
411 | */ | |
022d91ba | 412 | int event_agent_enable_all(struct ltt_ust_session *usess, |
fefd409b | 413 | struct agent *agt, struct lttng_event *event, |
51755dc8 | 414 | struct lttng_filter_bytecode *filter ,char *filter_expression) |
f20baf8e DG |
415 | { |
416 | int ret; | |
fefd409b | 417 | struct agent_event *aevent; |
f20baf8e DG |
418 | struct lttng_ht_iter iter; |
419 | ||
420 | assert(usess); | |
421 | ||
022d91ba | 422 | DBG("Event agent enabling ALL events for session %" PRIu64, usess->id); |
f20baf8e | 423 | |
022d91ba | 424 | /* Enable event on agent application through TCP socket. */ |
8404118c | 425 | ret = event_agent_enable(usess, agt, event, filter, filter_expression); |
f20baf8e DG |
426 | if (ret != LTTNG_OK) { |
427 | goto error; | |
428 | } | |
429 | ||
430 | /* Flag every event that they are now enabled. */ | |
431 | rcu_read_lock(); | |
fefd409b | 432 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent, |
f20baf8e | 433 | node.node) { |
fefd409b | 434 | aevent->enabled = 1; |
f20baf8e DG |
435 | } |
436 | rcu_read_unlock(); | |
437 | ||
438 | ret = LTTNG_OK; | |
439 | ||
440 | error: | |
441 | return ret; | |
442 | } | |
443 | ||
444 | /* | |
022d91ba | 445 | * Enable a single agent event for a given UST session. |
f20baf8e DG |
446 | * |
447 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
448 | */ | |
fefd409b DG |
449 | int event_agent_enable(struct ltt_ust_session *usess, |
450 | struct agent *agt, struct lttng_event *event, | |
8404118c JG |
451 | struct lttng_filter_bytecode *filter, |
452 | char *filter_expression) | |
f20baf8e DG |
453 | { |
454 | int ret, created = 0; | |
fefd409b | 455 | struct agent_event *aevent; |
f20baf8e DG |
456 | |
457 | assert(usess); | |
458 | assert(event); | |
fefd409b | 459 | assert(agt); |
f20baf8e | 460 | |
022d91ba | 461 | DBG("Event agent enabling %s for session %" PRIu64 " with loglevel type %d " |
51755dc8 JG |
462 | ", loglevel %d and filter \"%s\"", event->name, |
463 | usess->id, event->loglevel_type, event->loglevel, | |
464 | filter_expression ? filter_expression : "NULL"); | |
f20baf8e | 465 | |
a9319624 PP |
466 | aevent = agent_find_event(event->name, event->loglevel_type, |
467 | event->loglevel, agt); | |
fefd409b | 468 | if (!aevent) { |
a9319624 PP |
469 | aevent = agent_create_event(event->name, event->loglevel_type, |
470 | event->loglevel, filter, | |
51755dc8 | 471 | filter_expression); |
fefd409b | 472 | if (!aevent) { |
f20baf8e DG |
473 | ret = LTTNG_ERR_NOMEM; |
474 | goto error; | |
475 | } | |
476 | created = 1; | |
477 | } | |
478 | ||
479 | /* Already enabled? */ | |
fefd409b | 480 | if (aevent->enabled) { |
f20baf8e DG |
481 | goto end; |
482 | } | |
483 | ||
fefd409b | 484 | ret = agent_enable_event(aevent, agt->domain); |
f20baf8e DG |
485 | if (ret != LTTNG_OK) { |
486 | goto error; | |
487 | } | |
488 | ||
489 | /* If the event was created prior to the enable, add it to the domain. */ | |
490 | if (created) { | |
fefd409b | 491 | agent_add_event(aevent, agt); |
f20baf8e DG |
492 | } |
493 | ||
494 | end: | |
495 | return LTTNG_OK; | |
496 | ||
497 | error: | |
498 | if (created) { | |
fefd409b | 499 | agent_destroy_event(aevent); |
f20baf8e DG |
500 | } |
501 | return ret; | |
502 | } | |
503 | ||
da6c3a50 | 504 | /* |
d1ec8e20 JG |
505 | * Return the default event name associated with the provided UST domain. Return |
506 | * NULL on error. | |
da6c3a50 DG |
507 | */ |
508 | const char *event_get_default_agent_ust_name(enum lttng_domain_type domain) | |
509 | { | |
510 | const char *default_event_name = NULL; | |
511 | ||
0e115563 DG |
512 | switch (domain) { |
513 | case LTTNG_DOMAIN_LOG4J: | |
d1ec8e20 | 514 | default_event_name = DEFAULT_LOG4J_EVENT_NAME; |
0e115563 DG |
515 | break; |
516 | case LTTNG_DOMAIN_JUL: | |
d1ec8e20 | 517 | default_event_name = DEFAULT_JUL_EVENT_NAME; |
0e115563 DG |
518 | break; |
519 | case LTTNG_DOMAIN_PYTHON: | |
e7c82272 | 520 | default_event_name = DEFAULT_PYTHON_EVENT_NAME; |
0e115563 DG |
521 | break; |
522 | default: | |
da6c3a50 DG |
523 | assert(0); |
524 | } | |
525 | ||
526 | return default_event_name; | |
527 | } | |
528 | ||
f20baf8e | 529 | /* |
e261a6cc | 530 | * Disable a given agent event for a given UST session. |
f20baf8e | 531 | * |
e261a6cc | 532 | * Must be called with the RCU read lock held. |
f20baf8e DG |
533 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. |
534 | */ | |
e261a6cc PP |
535 | static int event_agent_disable_one(struct ltt_ust_session *usess, |
536 | struct agent *agt, struct agent_event *aevent) | |
f20baf8e DG |
537 | { |
538 | int ret; | |
be6a6276 DG |
539 | struct ltt_ust_event *uevent = NULL; |
540 | struct ltt_ust_channel *uchan = NULL; | |
71aecbf8 | 541 | const char *ust_event_name, *ust_channel_name; |
f20baf8e | 542 | |
fefd409b | 543 | assert(agt); |
f20baf8e | 544 | assert(usess); |
e261a6cc | 545 | assert(aevent); |
f20baf8e | 546 | |
e261a6cc PP |
547 | DBG("Event agent disabling %s (loglevel type %d, loglevel value %d) for session %" PRIu64, |
548 | aevent->name, aevent->loglevel_type, aevent->loglevel_value, | |
549 | usess->id); | |
f20baf8e DG |
550 | |
551 | /* Already disabled? */ | |
fefd409b | 552 | if (!aevent->enabled) { |
f20baf8e DG |
553 | goto end; |
554 | } | |
555 | ||
71aecbf8 DG |
556 | if (agt->domain == LTTNG_DOMAIN_JUL) { |
557 | ust_channel_name = DEFAULT_JUL_CHANNEL_NAME; | |
558 | } else if (agt->domain == LTTNG_DOMAIN_LOG4J) { | |
559 | ust_channel_name = DEFAULT_LOG4J_CHANNEL_NAME; | |
0e115563 DG |
560 | } else if (agt->domain == LTTNG_DOMAIN_PYTHON) { |
561 | ust_channel_name = DEFAULT_PYTHON_CHANNEL_NAME; | |
71aecbf8 DG |
562 | } else { |
563 | ret = LTTNG_ERR_INVALID; | |
564 | goto error; | |
565 | } | |
566 | ||
be6a6276 DG |
567 | /* |
568 | * Disable it on the UST side. First get the channel reference then find | |
569 | * the event and finally disable it. | |
570 | */ | |
571 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
71aecbf8 | 572 | (char *) ust_channel_name); |
be6a6276 DG |
573 | if (!uchan) { |
574 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
575 | goto error; | |
576 | } | |
577 | ||
da6c3a50 DG |
578 | ust_event_name = event_get_default_agent_ust_name(agt->domain); |
579 | if (!ust_event_name) { | |
580 | ret = LTTNG_ERR_FATAL; | |
581 | goto error; | |
be6a6276 DG |
582 | } |
583 | ||
584 | /* | |
b953b8cd PP |
585 | * Agent UST event has its loglevel type forced to |
586 | * LTTNG_UST_LOGLEVEL_ALL. The actual loglevel type/value filtering | |
587 | * happens thanks to an UST filter. The following -1 is actually | |
588 | * ignored since the type is LTTNG_UST_LOGLEVEL_ALL. | |
be6a6276 | 589 | */ |
da6c3a50 | 590 | uevent = trace_ust_find_event(uchan->events, (char *) ust_event_name, |
b953b8cd | 591 | aevent->filter, LTTNG_UST_LOGLEVEL_ALL, -1, NULL); |
022d91ba | 592 | /* If the agent event exists, it must be available on the UST side. */ |
be6a6276 DG |
593 | assert(uevent); |
594 | ||
595 | ret = ust_app_disable_event_glb(usess, uchan, uevent); | |
596 | if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) { | |
597 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
598 | goto error; | |
599 | } | |
600 | ||
0dcfcf94 DG |
601 | /* |
602 | * Flag event that it's disabled so the shadow copy on the ust app side | |
603 | * will disable it if an application shows up. | |
604 | */ | |
605 | uevent->enabled = 0; | |
606 | ||
fefd409b | 607 | ret = agent_disable_event(aevent, agt->domain); |
f20baf8e DG |
608 | if (ret != LTTNG_OK) { |
609 | goto error; | |
610 | } | |
611 | ||
612 | end: | |
613 | return LTTNG_OK; | |
614 | ||
615 | error: | |
616 | return ret; | |
617 | } | |
e261a6cc PP |
618 | |
619 | /* | |
620 | * Disable all agent events matching a given name for a given UST session. | |
621 | * | |
622 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
623 | */ | |
624 | int event_agent_disable(struct ltt_ust_session *usess, struct agent *agt, | |
625 | char *event_name) | |
626 | { | |
627 | int ret = LTTNG_OK; | |
628 | struct agent_event *aevent; | |
629 | struct lttng_ht_iter iter; | |
630 | struct lttng_ht_node_str *node; | |
631 | ||
632 | assert(agt); | |
633 | assert(usess); | |
634 | assert(event_name); | |
635 | ||
636 | DBG("Event agent disabling %s (all loglevels) for session %" PRIu64, event_name, usess->id); | |
637 | ||
638 | rcu_read_lock(); | |
639 | agent_find_events_by_name(event_name, agt, &iter); | |
640 | node = lttng_ht_iter_get_node_str(&iter); | |
641 | ||
642 | if (node == NULL) { | |
643 | DBG2("Event agent NOT found by name %s", event_name); | |
644 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
645 | goto end; | |
646 | } | |
647 | ||
648 | do { | |
649 | aevent = caa_container_of(node, struct agent_event, node); | |
650 | ret = event_agent_disable_one(usess, agt, aevent); | |
651 | ||
652 | if (ret != LTTNG_OK) { | |
653 | goto end; | |
654 | } | |
655 | ||
656 | /* Get next duplicate agent event by name. */ | |
657 | agent_event_next_duplicate(event_name, agt, &iter); | |
658 | node = lttng_ht_iter_get_node_str(&iter); | |
659 | } while (node); | |
660 | end: | |
661 | rcu_read_unlock(); | |
662 | return ret; | |
663 | } | |
f20baf8e | 664 | /* |
022d91ba | 665 | * Disable all agent event for a given UST session. |
f20baf8e DG |
666 | * |
667 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
668 | */ | |
fefd409b DG |
669 | int event_agent_disable_all(struct ltt_ust_session *usess, |
670 | struct agent *agt) | |
f20baf8e | 671 | { |
0dcfcf94 | 672 | int ret; |
fefd409b | 673 | struct agent_event *aevent; |
f20baf8e DG |
674 | struct lttng_ht_iter iter; |
675 | ||
fefd409b | 676 | assert(agt); |
f20baf8e DG |
677 | assert(usess); |
678 | ||
0dcfcf94 DG |
679 | /* |
680 | * Disable event on agent application. Continue to disable all other events | |
681 | * if the * event is not found. | |
682 | */ | |
fefd409b | 683 | ret = event_agent_disable(usess, agt, "*"); |
0dcfcf94 DG |
684 | if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_NOT_FOUND) { |
685 | goto error; | |
f20baf8e DG |
686 | } |
687 | ||
b9866e08 | 688 | /* Disable every event. */ |
f20baf8e | 689 | rcu_read_lock(); |
fefd409b | 690 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent, |
f20baf8e | 691 | node.node) { |
0dcfcf94 DG |
692 | if (!aevent->enabled) { |
693 | continue; | |
694 | } | |
695 | ||
696 | ret = event_agent_disable(usess, agt, aevent->name); | |
697 | if (ret != LTTNG_OK) { | |
b9866e08 | 698 | goto error_unlock; |
f20baf8e | 699 | } |
f20baf8e | 700 | } |
f20baf8e DG |
701 | ret = LTTNG_OK; |
702 | ||
b9866e08 JG |
703 | error_unlock: |
704 | rcu_read_unlock(); | |
f20baf8e DG |
705 | error: |
706 | return ret; | |
707 | } |