Commit | Line | Data |
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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 | ||
6c1c0768 | 18 | #define _LGPL_SOURCE |
d87bfb32 | 19 | #include <errno.h> |
54d01ffb | 20 | #include <urcu/list.h> |
2bdd86d4 | 21 | #include <string.h> |
54d01ffb DG |
22 | |
23 | #include <lttng/lttng.h> | |
db758600 | 24 | #include <common/error.h> |
10a8a223 | 25 | #include <common/sessiond-comm/sessiond-comm.h> |
b6ba0c85 JG |
26 | #include <common/filter.h> |
27 | #include <common/context.h> | |
54d01ffb DG |
28 | |
29 | #include "channel.h" | |
30 | #include "event.h" | |
4771f025 | 31 | #include "kernel.h" |
be6a6276 | 32 | #include "lttng-sessiond.h" |
9df8df5e | 33 | #include "ust-ctl.h" |
edb67388 DG |
34 | #include "ust-app.h" |
35 | #include "trace-kernel.h" | |
36 | #include "trace-ust.h" | |
7c1d2758 | 37 | #include "agent.h" |
54d01ffb | 38 | |
025faf73 DG |
39 | /* |
40 | * Add unique UST event based on the event name, filter bytecode and loglevel. | |
41 | */ | |
18eace3b DG |
42 | static void add_unique_ust_event(struct lttng_ht *ht, |
43 | struct ltt_ust_event *event) | |
44 | { | |
45 | struct cds_lfht_node *node_ptr; | |
46 | struct ltt_ust_ht_key key; | |
47 | ||
48 | assert(ht); | |
49 | assert(ht->ht); | |
50 | assert(event); | |
51 | ||
52 | key.name = event->attr.name; | |
53 | key.filter = (struct lttng_filter_bytecode *) event->filter; | |
b953b8cd PP |
54 | key.loglevel_type = event->attr.loglevel_type; |
55 | key.loglevel_value = event->attr.loglevel; | |
4031e53e | 56 | key.exclusion = event->exclusion; |
18eace3b DG |
57 | |
58 | node_ptr = cds_lfht_add_unique(ht->ht, | |
59 | ht->hash_fct(event->node.key, lttng_ht_seed), | |
60 | trace_ust_ht_match_event, &key, &event->node.node); | |
61 | assert(node_ptr == &event->node.node); | |
62 | } | |
63 | ||
54d01ffb | 64 | /* |
9550ee81 JR |
65 | * Disable kernel tracepoint events for a channel from the kernel session of |
66 | * a specified event_name and event type. | |
67 | * On type LTTNG_EVENT_ALL all events with event_name are disabled. | |
68 | * If event_name is NULL all events of the specified type are disabled. | |
54d01ffb | 69 | */ |
d0ae4ea8 | 70 | int event_kernel_disable_event(struct ltt_kernel_channel *kchan, |
9550ee81 | 71 | char *event_name, enum lttng_event_type type) |
54d01ffb | 72 | { |
9550ee81 | 73 | int ret, error = 0, found = 0; |
54d01ffb DG |
74 | struct ltt_kernel_event *kevent; |
75 | ||
0525e9ae DG |
76 | assert(kchan); |
77 | ||
54d01ffb DG |
78 | /* For each event in the kernel session */ |
79 | cds_list_for_each_entry(kevent, &kchan->events_list.head, list) { | |
d0ae4ea8 MD |
80 | if (type != LTTNG_EVENT_ALL && kevent->type != type) |
81 | continue; | |
9550ee81 JR |
82 | if (event_name != NULL && strcmp(event_name, kevent->event->name)) { |
83 | continue; | |
84 | } | |
85 | found++; | |
54d01ffb DG |
86 | ret = kernel_disable_event(kevent); |
87 | if (ret < 0) { | |
9550ee81 | 88 | error = 1; |
54d01ffb DG |
89 | continue; |
90 | } | |
91 | } | |
9550ee81 JR |
92 | DBG("Disable kernel event: found %d events with name: %s and type: %d", |
93 | found, event_name ? event_name : "NULL", type); | |
7a3d1328 | 94 | |
9550ee81 JR |
95 | if (event_name != NULL && !found) { |
96 | ret = LTTNG_ERR_NO_EVENT; | |
97 | } else { | |
98 | ret = error ? LTTNG_ERR_KERN_DISABLE_FAIL : LTTNG_OK; | |
99 | } | |
100 | ||
101 | return ret; | |
54d01ffb DG |
102 | } |
103 | ||
104 | /* | |
7a3d1328 | 105 | * Enable kernel tracepoint event for a channel from the kernel session. |
49d21f93 | 106 | * We own filter_expression and filter. |
54d01ffb | 107 | */ |
d0ae4ea8 | 108 | int event_kernel_enable_event(struct ltt_kernel_channel *kchan, |
00a62084 MD |
109 | struct lttng_event *event, char *filter_expression, |
110 | struct lttng_filter_bytecode *filter) | |
54d01ffb DG |
111 | { |
112 | int ret; | |
113 | struct ltt_kernel_event *kevent; | |
114 | ||
0525e9ae DG |
115 | assert(kchan); |
116 | assert(event); | |
117 | ||
00a62084 MD |
118 | kevent = trace_kernel_find_event(event->name, kchan, |
119 | event->type, filter); | |
54d01ffb | 120 | if (kevent == NULL) { |
00a62084 MD |
121 | ret = kernel_create_event(event, kchan, |
122 | filter_expression, filter); | |
a969e101 MD |
123 | /* We have passed ownership */ |
124 | filter_expression = NULL; | |
125 | filter = NULL; | |
54d01ffb | 126 | if (ret < 0) { |
bd29c13d DG |
127 | switch (-ret) { |
128 | case EEXIST: | |
f73fabfd | 129 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
bd29c13d DG |
130 | break; |
131 | case ENOSYS: | |
f73fabfd | 132 | ret = LTTNG_ERR_KERN_EVENT_ENOSYS; |
bd29c13d DG |
133 | break; |
134 | default: | |
f73fabfd | 135 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
bd29c13d | 136 | break; |
d87bfb32 | 137 | } |
7a3d1328 | 138 | goto end; |
54d01ffb DG |
139 | } |
140 | } else if (kevent->enabled == 0) { | |
141 | ret = kernel_enable_event(kevent); | |
142 | if (ret < 0) { | |
f73fabfd | 143 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
7a3d1328 | 144 | goto end; |
54d01ffb | 145 | } |
42224349 DG |
146 | } else { |
147 | /* At this point, the event is considered enabled */ | |
f73fabfd | 148 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
42224349 | 149 | goto end; |
54d01ffb | 150 | } |
42224349 | 151 | |
f73fabfd | 152 | ret = LTTNG_OK; |
7a3d1328 | 153 | end: |
a969e101 MD |
154 | free(filter_expression); |
155 | free(filter); | |
54d01ffb DG |
156 | return ret; |
157 | } | |
158 | ||
7f79d3a1 DG |
159 | /* |
160 | * ============================ | |
161 | * UST : The Ultimate Frontier! | |
162 | * ============================ | |
163 | */ | |
164 | ||
2bdd86d4 MD |
165 | /* |
166 | * Enable UST tracepoint event for a channel from a UST session. | |
49d21f93 | 167 | * We own filter_expression, filter, and exclusion. |
2bdd86d4 | 168 | */ |
7972aab2 | 169 | int event_ust_enable_tracepoint(struct ltt_ust_session *usess, |
025faf73 | 170 | struct ltt_ust_channel *uchan, struct lttng_event *event, |
6b453b5e | 171 | char *filter_expression, |
f1613f52 | 172 | struct lttng_filter_bytecode *filter, |
88f06f15 JG |
173 | struct lttng_event_exclusion *exclusion, |
174 | bool internal_event) | |
2bdd86d4 | 175 | { |
f73fabfd | 176 | int ret = LTTNG_OK, to_create = 0; |
edb67388 DG |
177 | struct ltt_ust_event *uevent; |
178 | ||
0525e9ae DG |
179 | assert(usess); |
180 | assert(uchan); | |
181 | assert(event); | |
182 | ||
18eace3b DG |
183 | rcu_read_lock(); |
184 | ||
025faf73 | 185 | uevent = trace_ust_find_event(uchan->events, event->name, filter, |
b953b8cd | 186 | event->loglevel_type, event->loglevel, exclusion); |
87c6e328 | 187 | if (!uevent) { |
6b453b5e | 188 | uevent = trace_ust_create_event(event, filter_expression, |
87c6e328 | 189 | filter, exclusion, internal_event); |
49d21f93 MD |
190 | /* We have passed ownership */ |
191 | filter_expression = NULL; | |
192 | filter = NULL; | |
193 | exclusion = NULL; | |
edb67388 | 194 | if (uevent == NULL) { |
95a82664 | 195 | ret = LTTNG_ERR_UST_ENABLE_FAIL; |
edb67388 DG |
196 | goto error; |
197 | } | |
025faf73 | 198 | |
fc34caaa | 199 | /* Valid to set it after the goto error since uevent is still NULL */ |
edb67388 DG |
200 | to_create = 1; |
201 | } | |
2bdd86d4 | 202 | |
7f79d3a1 DG |
203 | if (uevent->enabled) { |
204 | /* It's already enabled so everything is OK */ | |
5bcdda4f | 205 | ret = LTTNG_ERR_UST_EVENT_ENABLED; |
7f79d3a1 DG |
206 | goto end; |
207 | } | |
208 | ||
fc34caaa DG |
209 | uevent->enabled = 1; |
210 | ||
7972aab2 DG |
211 | if (to_create) { |
212 | /* Create event on all UST registered apps for session */ | |
213 | ret = ust_app_create_event_glb(usess, uchan, uevent); | |
214 | } else { | |
215 | /* Enable event on all UST registered apps for session */ | |
216 | ret = ust_app_enable_event_glb(usess, uchan, uevent); | |
217 | } | |
48842b30 | 218 | |
7972aab2 DG |
219 | if (ret < 0) { |
220 | if (ret == -LTTNG_UST_ERR_EXIST) { | |
221 | ret = LTTNG_ERR_UST_EVENT_EXIST; | |
222 | goto end; | |
223 | } else { | |
224 | ret = LTTNG_ERR_UST_ENABLE_FAIL; | |
225 | goto error; | |
edb67388 | 226 | } |
2bdd86d4 | 227 | } |
48842b30 | 228 | |
7f79d3a1 | 229 | if (to_create) { |
fc34caaa | 230 | /* Add ltt ust event to channel */ |
18eace3b | 231 | add_unique_ust_event(uchan->events, uevent); |
7f79d3a1 | 232 | } |
edb67388 | 233 | |
7f79d3a1 DG |
234 | DBG("Event UST %s %s in channel %s", uevent->attr.name, |
235 | to_create ? "created" : "enabled", uchan->name); | |
236 | ||
f73fabfd | 237 | ret = LTTNG_OK; |
fc34caaa | 238 | |
fb89d070 | 239 | end: |
18eace3b | 240 | rcu_read_unlock(); |
49d21f93 MD |
241 | free(filter_expression); |
242 | free(filter); | |
243 | free(exclusion); | |
fc34caaa | 244 | return ret; |
edb67388 DG |
245 | |
246 | error: | |
fc34caaa DG |
247 | /* |
248 | * Only destroy event on creation time (not enabling time) because if the | |
249 | * event is found in the channel (to_create == 0), it means that at some | |
250 | * point the enable_event worked and it's thus valid to keep it alive. | |
251 | * Destroying it also implies that we also destroy it's shadow copy to sync | |
252 | * everyone up. | |
253 | */ | |
254 | if (to_create) { | |
255 | /* In this code path, the uevent was not added to the hash table */ | |
256 | trace_ust_destroy_event(uevent); | |
257 | } | |
18eace3b | 258 | rcu_read_unlock(); |
49d21f93 MD |
259 | free(filter_expression); |
260 | free(filter); | |
261 | free(exclusion); | |
2bdd86d4 MD |
262 | return ret; |
263 | } | |
264 | ||
7f79d3a1 DG |
265 | /* |
266 | * Disable UST tracepoint of a channel from a UST session. | |
267 | */ | |
7972aab2 | 268 | int event_ust_disable_tracepoint(struct ltt_ust_session *usess, |
7f79d3a1 | 269 | struct ltt_ust_channel *uchan, char *event_name) |
2bdd86d4 MD |
270 | { |
271 | int ret; | |
7f79d3a1 | 272 | struct ltt_ust_event *uevent; |
18eace3b DG |
273 | struct lttng_ht_node_str *node; |
274 | struct lttng_ht_iter iter; | |
18eace3b | 275 | struct lttng_ht *ht; |
2bdd86d4 | 276 | |
0525e9ae DG |
277 | assert(usess); |
278 | assert(uchan); | |
279 | assert(event_name); | |
280 | ||
18eace3b DG |
281 | ht = uchan->events; |
282 | ||
18eace3b | 283 | rcu_read_lock(); |
025faf73 DG |
284 | |
285 | /* | |
286 | * We use a custom lookup since we need the iterator for the next_duplicate | |
287 | * call in the do while loop below. | |
288 | */ | |
289 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) event_name, lttng_ht_seed), | |
290 | trace_ust_ht_match_event_by_name, event_name, &iter.iter); | |
18eace3b DG |
291 | node = lttng_ht_iter_get_node_str(&iter); |
292 | if (node == NULL) { | |
293 | DBG2("Trace UST event NOT found by name %s", event_name); | |
f73fabfd | 294 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; |
7f79d3a1 | 295 | goto error; |
2bdd86d4 | 296 | } |
7f79d3a1 | 297 | |
18eace3b DG |
298 | do { |
299 | uevent = caa_container_of(node, struct ltt_ust_event, node); | |
025faf73 DG |
300 | assert(uevent); |
301 | ||
18eace3b DG |
302 | if (uevent->enabled == 0) { |
303 | /* It's already disabled so everything is OK */ | |
a1dcaf0f | 304 | goto next; |
7f79d3a1 | 305 | } |
18eace3b | 306 | |
7972aab2 DG |
307 | ret = ust_app_disable_event_glb(usess, uchan, uevent); |
308 | if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) { | |
309 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
18eace3b DG |
310 | goto error; |
311 | } | |
18eace3b DG |
312 | uevent->enabled = 0; |
313 | ||
025faf73 DG |
314 | DBG2("Event UST %s disabled in channel %s", uevent->attr.name, |
315 | uchan->name); | |
316 | ||
a1dcaf0f | 317 | next: |
18eace3b DG |
318 | /* Get next duplicate event by name. */ |
319 | cds_lfht_next_duplicate(ht->ht, trace_ust_ht_match_event_by_name, | |
320 | event_name, &iter.iter); | |
321 | node = lttng_ht_iter_get_node_str(&iter); | |
322 | } while (node); | |
7f79d3a1 | 323 | |
f73fabfd | 324 | ret = LTTNG_OK; |
7f79d3a1 | 325 | |
7f79d3a1 | 326 | error: |
18eace3b | 327 | rcu_read_unlock(); |
7f79d3a1 DG |
328 | return ret; |
329 | } | |
330 | ||
b1e7fe2d JR |
331 | /* |
332 | * Disable all UST tracepoints for a channel from a UST session. | |
333 | */ | |
334 | int event_ust_disable_all_tracepoints(struct ltt_ust_session *usess, | |
335 | struct ltt_ust_channel *uchan) | |
336 | { | |
3e81c0f2 | 337 | int ret, i, size, error = 0; |
b1e7fe2d JR |
338 | struct lttng_ht_iter iter; |
339 | struct ltt_ust_event *uevent = NULL; | |
340 | struct lttng_event *events = NULL; | |
341 | ||
342 | assert(usess); | |
343 | assert(uchan); | |
344 | ||
345 | rcu_read_lock(); | |
346 | ||
347 | /* Disabling existing events */ | |
348 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, | |
349 | node.node) { | |
350 | if (uevent->enabled == 1) { | |
351 | ret = event_ust_disable_tracepoint(usess, uchan, | |
352 | uevent->attr.name); | |
353 | if (ret < 0) { | |
3e81c0f2 | 354 | error = LTTNG_ERR_UST_DISABLE_FAIL; |
b1e7fe2d JR |
355 | continue; |
356 | } | |
357 | } | |
358 | } | |
359 | ||
360 | /* Get all UST available events */ | |
361 | size = ust_app_list_events(&events); | |
362 | if (size < 0) { | |
363 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
364 | goto error; | |
365 | } | |
366 | ||
367 | for (i = 0; i < size; i++) { | |
368 | ret = event_ust_disable_tracepoint(usess, uchan, | |
369 | events[i].name); | |
3e81c0f2 | 370 | if (ret < 0) { |
b1e7fe2d | 371 | /* Continue to disable the rest... */ |
3e81c0f2 | 372 | error = LTTNG_ERR_UST_DISABLE_FAIL; |
b1e7fe2d JR |
373 | continue; |
374 | } | |
375 | } | |
376 | ||
3e81c0f2 | 377 | ret = error ? error : LTTNG_OK; |
b1e7fe2d JR |
378 | error: |
379 | rcu_read_unlock(); | |
380 | free(events); | |
381 | return ret; | |
382 | } | |
383 | ||
f20baf8e | 384 | /* |
022d91ba | 385 | * Enable all agent event for a given UST session. |
f20baf8e DG |
386 | * |
387 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
388 | */ | |
022d91ba | 389 | int event_agent_enable_all(struct ltt_ust_session *usess, |
fefd409b | 390 | struct agent *agt, struct lttng_event *event, |
51755dc8 | 391 | struct lttng_filter_bytecode *filter ,char *filter_expression) |
f20baf8e DG |
392 | { |
393 | int ret; | |
fefd409b | 394 | struct agent_event *aevent; |
f20baf8e DG |
395 | struct lttng_ht_iter iter; |
396 | ||
397 | assert(usess); | |
398 | ||
022d91ba | 399 | DBG("Event agent enabling ALL events for session %" PRIu64, usess->id); |
f20baf8e | 400 | |
022d91ba | 401 | /* Enable event on agent application through TCP socket. */ |
8404118c | 402 | ret = event_agent_enable(usess, agt, event, filter, filter_expression); |
f20baf8e DG |
403 | if (ret != LTTNG_OK) { |
404 | goto error; | |
405 | } | |
406 | ||
407 | /* Flag every event that they are now enabled. */ | |
408 | rcu_read_lock(); | |
fefd409b | 409 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent, |
f20baf8e | 410 | node.node) { |
fefd409b | 411 | aevent->enabled = 1; |
f20baf8e DG |
412 | } |
413 | rcu_read_unlock(); | |
414 | ||
415 | ret = LTTNG_OK; | |
416 | ||
417 | error: | |
418 | return ret; | |
419 | } | |
420 | ||
b6ba0c85 JG |
421 | /* |
422 | * Check if this event's filter requires the activation of application contexts | |
423 | * and enable them in the agent. | |
424 | */ | |
425 | static int add_filter_app_ctx(struct lttng_filter_bytecode *bytecode, | |
426 | const char *filter_expression, struct agent *agt) | |
427 | { | |
428 | int ret = LTTNG_OK; | |
429 | char *provider_name = NULL, *ctx_name = NULL; | |
430 | struct bytecode_symbol_iterator *it = | |
431 | bytecode_symbol_iterator_create(bytecode); | |
432 | ||
433 | if (!it) { | |
434 | ret = LTTNG_ERR_NOMEM; | |
435 | goto end; | |
436 | } | |
437 | ||
438 | do { | |
439 | struct lttng_event_context ctx; | |
440 | const char *symbol_name = | |
441 | bytecode_symbol_iterator_get_name(it); | |
442 | ||
443 | if (parse_application_context(symbol_name, &provider_name, | |
444 | &ctx_name)) { | |
445 | /* Not an application context. */ | |
446 | continue; | |
447 | } | |
448 | ||
449 | ctx.ctx = LTTNG_EVENT_CONTEXT_APP_CONTEXT; | |
450 | ctx.u.app_ctx.provider_name = provider_name; | |
451 | ctx.u.app_ctx.ctx_name = ctx_name; | |
452 | ||
453 | /* Recognized an application context. */ | |
454 | DBG("Enabling event with filter expression \"%s\" requires enabling the %s:%s application context.", | |
455 | filter_expression, provider_name, ctx_name); | |
456 | ||
457 | ret = agent_add_context(&ctx, agt); | |
458 | if (ret != LTTNG_OK) { | |
459 | ERR("Failed to add application context %s:%s.", | |
460 | provider_name, ctx_name); | |
461 | goto end; | |
462 | } | |
463 | ||
464 | ret = agent_enable_context(&ctx, agt->domain); | |
465 | if (ret != LTTNG_OK) { | |
466 | ERR("Failed to enable application context %s:%s.", | |
467 | provider_name, ctx_name); | |
468 | goto end; | |
469 | } | |
470 | ||
471 | free(provider_name); | |
472 | free(ctx_name); | |
473 | provider_name = ctx_name = NULL; | |
474 | } while (bytecode_symbol_iterator_next(it) == 0); | |
475 | end: | |
476 | free(provider_name); | |
477 | free(ctx_name); | |
478 | bytecode_symbol_iterator_destroy(it); | |
479 | return ret; | |
480 | } | |
481 | ||
f20baf8e | 482 | /* |
022d91ba | 483 | * Enable a single agent event for a given UST session. |
f20baf8e DG |
484 | * |
485 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
486 | */ | |
fefd409b DG |
487 | int event_agent_enable(struct ltt_ust_session *usess, |
488 | struct agent *agt, struct lttng_event *event, | |
8404118c JG |
489 | struct lttng_filter_bytecode *filter, |
490 | char *filter_expression) | |
f20baf8e DG |
491 | { |
492 | int ret, created = 0; | |
fefd409b | 493 | struct agent_event *aevent; |
f20baf8e DG |
494 | |
495 | assert(usess); | |
496 | assert(event); | |
fefd409b | 497 | assert(agt); |
f20baf8e | 498 | |
022d91ba | 499 | DBG("Event agent enabling %s for session %" PRIu64 " with loglevel type %d " |
51755dc8 JG |
500 | ", loglevel %d and filter \"%s\"", event->name, |
501 | usess->id, event->loglevel_type, event->loglevel, | |
502 | filter_expression ? filter_expression : "NULL"); | |
f20baf8e | 503 | |
a9319624 | 504 | aevent = agent_find_event(event->name, event->loglevel_type, |
b6ba0c85 | 505 | event->loglevel, filter_expression, agt); |
fefd409b | 506 | if (!aevent) { |
a9319624 PP |
507 | aevent = agent_create_event(event->name, event->loglevel_type, |
508 | event->loglevel, filter, | |
51755dc8 | 509 | filter_expression); |
fefd409b | 510 | if (!aevent) { |
f20baf8e DG |
511 | ret = LTTNG_ERR_NOMEM; |
512 | goto error; | |
513 | } | |
b6ba0c85 | 514 | |
f20baf8e DG |
515 | created = 1; |
516 | } | |
517 | ||
518 | /* Already enabled? */ | |
fefd409b | 519 | if (aevent->enabled) { |
f20baf8e DG |
520 | goto end; |
521 | } | |
522 | ||
b6ba0c85 JG |
523 | if (created && filter) { |
524 | ret = add_filter_app_ctx(filter, filter_expression, agt); | |
525 | if (ret != LTTNG_OK) { | |
526 | goto error; | |
527 | } | |
528 | } | |
529 | ||
fefd409b | 530 | ret = agent_enable_event(aevent, agt->domain); |
f20baf8e DG |
531 | if (ret != LTTNG_OK) { |
532 | goto error; | |
533 | } | |
534 | ||
535 | /* If the event was created prior to the enable, add it to the domain. */ | |
536 | if (created) { | |
fefd409b | 537 | agent_add_event(aevent, agt); |
f20baf8e DG |
538 | } |
539 | ||
540 | end: | |
541 | return LTTNG_OK; | |
542 | ||
543 | error: | |
544 | if (created) { | |
fefd409b | 545 | agent_destroy_event(aevent); |
f20baf8e DG |
546 | } |
547 | return ret; | |
548 | } | |
549 | ||
da6c3a50 | 550 | /* |
d1ec8e20 JG |
551 | * Return the default event name associated with the provided UST domain. Return |
552 | * NULL on error. | |
da6c3a50 DG |
553 | */ |
554 | const char *event_get_default_agent_ust_name(enum lttng_domain_type domain) | |
555 | { | |
556 | const char *default_event_name = NULL; | |
557 | ||
0e115563 DG |
558 | switch (domain) { |
559 | case LTTNG_DOMAIN_LOG4J: | |
d1ec8e20 | 560 | default_event_name = DEFAULT_LOG4J_EVENT_NAME; |
0e115563 DG |
561 | break; |
562 | case LTTNG_DOMAIN_JUL: | |
d1ec8e20 | 563 | default_event_name = DEFAULT_JUL_EVENT_NAME; |
0e115563 DG |
564 | break; |
565 | case LTTNG_DOMAIN_PYTHON: | |
e7c82272 | 566 | default_event_name = DEFAULT_PYTHON_EVENT_NAME; |
0e115563 DG |
567 | break; |
568 | default: | |
da6c3a50 DG |
569 | assert(0); |
570 | } | |
571 | ||
572 | return default_event_name; | |
573 | } | |
574 | ||
f20baf8e | 575 | /* |
e261a6cc | 576 | * Disable a given agent event for a given UST session. |
f20baf8e | 577 | * |
e261a6cc | 578 | * Must be called with the RCU read lock held. |
f20baf8e DG |
579 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. |
580 | */ | |
e261a6cc PP |
581 | static int event_agent_disable_one(struct ltt_ust_session *usess, |
582 | struct agent *agt, struct agent_event *aevent) | |
f20baf8e DG |
583 | { |
584 | int ret; | |
be6a6276 DG |
585 | struct ltt_ust_event *uevent = NULL; |
586 | struct ltt_ust_channel *uchan = NULL; | |
71aecbf8 | 587 | const char *ust_event_name, *ust_channel_name; |
f20baf8e | 588 | |
fefd409b | 589 | assert(agt); |
f20baf8e | 590 | assert(usess); |
e261a6cc | 591 | assert(aevent); |
f20baf8e | 592 | |
e261a6cc PP |
593 | DBG("Event agent disabling %s (loglevel type %d, loglevel value %d) for session %" PRIu64, |
594 | aevent->name, aevent->loglevel_type, aevent->loglevel_value, | |
595 | usess->id); | |
f20baf8e DG |
596 | |
597 | /* Already disabled? */ | |
fefd409b | 598 | if (!aevent->enabled) { |
f20baf8e DG |
599 | goto end; |
600 | } | |
601 | ||
71aecbf8 DG |
602 | if (agt->domain == LTTNG_DOMAIN_JUL) { |
603 | ust_channel_name = DEFAULT_JUL_CHANNEL_NAME; | |
604 | } else if (agt->domain == LTTNG_DOMAIN_LOG4J) { | |
605 | ust_channel_name = DEFAULT_LOG4J_CHANNEL_NAME; | |
0e115563 DG |
606 | } else if (agt->domain == LTTNG_DOMAIN_PYTHON) { |
607 | ust_channel_name = DEFAULT_PYTHON_CHANNEL_NAME; | |
71aecbf8 DG |
608 | } else { |
609 | ret = LTTNG_ERR_INVALID; | |
610 | goto error; | |
611 | } | |
612 | ||
be6a6276 DG |
613 | /* |
614 | * Disable it on the UST side. First get the channel reference then find | |
615 | * the event and finally disable it. | |
616 | */ | |
617 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
71aecbf8 | 618 | (char *) ust_channel_name); |
be6a6276 DG |
619 | if (!uchan) { |
620 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
621 | goto error; | |
622 | } | |
623 | ||
da6c3a50 DG |
624 | ust_event_name = event_get_default_agent_ust_name(agt->domain); |
625 | if (!ust_event_name) { | |
626 | ret = LTTNG_ERR_FATAL; | |
627 | goto error; | |
be6a6276 DG |
628 | } |
629 | ||
630 | /* | |
b953b8cd PP |
631 | * Agent UST event has its loglevel type forced to |
632 | * LTTNG_UST_LOGLEVEL_ALL. The actual loglevel type/value filtering | |
633 | * happens thanks to an UST filter. The following -1 is actually | |
634 | * ignored since the type is LTTNG_UST_LOGLEVEL_ALL. | |
be6a6276 | 635 | */ |
da6c3a50 | 636 | uevent = trace_ust_find_event(uchan->events, (char *) ust_event_name, |
b953b8cd | 637 | aevent->filter, LTTNG_UST_LOGLEVEL_ALL, -1, NULL); |
022d91ba | 638 | /* If the agent event exists, it must be available on the UST side. */ |
be6a6276 DG |
639 | assert(uevent); |
640 | ||
641 | ret = ust_app_disable_event_glb(usess, uchan, uevent); | |
642 | if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) { | |
643 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
644 | goto error; | |
645 | } | |
646 | ||
0dcfcf94 DG |
647 | /* |
648 | * Flag event that it's disabled so the shadow copy on the ust app side | |
649 | * will disable it if an application shows up. | |
650 | */ | |
651 | uevent->enabled = 0; | |
652 | ||
fefd409b | 653 | ret = agent_disable_event(aevent, agt->domain); |
f20baf8e DG |
654 | if (ret != LTTNG_OK) { |
655 | goto error; | |
656 | } | |
657 | ||
658 | end: | |
659 | return LTTNG_OK; | |
660 | ||
661 | error: | |
662 | return ret; | |
663 | } | |
e261a6cc PP |
664 | |
665 | /* | |
666 | * Disable all agent events matching a given name for a given UST session. | |
667 | * | |
668 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
669 | */ | |
670 | int event_agent_disable(struct ltt_ust_session *usess, struct agent *agt, | |
671 | char *event_name) | |
672 | { | |
673 | int ret = LTTNG_OK; | |
674 | struct agent_event *aevent; | |
675 | struct lttng_ht_iter iter; | |
676 | struct lttng_ht_node_str *node; | |
677 | ||
678 | assert(agt); | |
679 | assert(usess); | |
680 | assert(event_name); | |
681 | ||
682 | DBG("Event agent disabling %s (all loglevels) for session %" PRIu64, event_name, usess->id); | |
683 | ||
684 | rcu_read_lock(); | |
685 | agent_find_events_by_name(event_name, agt, &iter); | |
686 | node = lttng_ht_iter_get_node_str(&iter); | |
687 | ||
688 | if (node == NULL) { | |
689 | DBG2("Event agent NOT found by name %s", event_name); | |
690 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
691 | goto end; | |
692 | } | |
693 | ||
694 | do { | |
695 | aevent = caa_container_of(node, struct agent_event, node); | |
696 | ret = event_agent_disable_one(usess, agt, aevent); | |
697 | ||
698 | if (ret != LTTNG_OK) { | |
699 | goto end; | |
700 | } | |
701 | ||
702 | /* Get next duplicate agent event by name. */ | |
703 | agent_event_next_duplicate(event_name, agt, &iter); | |
704 | node = lttng_ht_iter_get_node_str(&iter); | |
705 | } while (node); | |
706 | end: | |
707 | rcu_read_unlock(); | |
708 | return ret; | |
709 | } | |
f20baf8e | 710 | /* |
022d91ba | 711 | * Disable all agent event for a given UST session. |
f20baf8e DG |
712 | * |
713 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
714 | */ | |
fefd409b DG |
715 | int event_agent_disable_all(struct ltt_ust_session *usess, |
716 | struct agent *agt) | |
f20baf8e | 717 | { |
0dcfcf94 | 718 | int ret; |
fefd409b | 719 | struct agent_event *aevent; |
f20baf8e DG |
720 | struct lttng_ht_iter iter; |
721 | ||
fefd409b | 722 | assert(agt); |
f20baf8e DG |
723 | assert(usess); |
724 | ||
0dcfcf94 DG |
725 | /* |
726 | * Disable event on agent application. Continue to disable all other events | |
727 | * if the * event is not found. | |
728 | */ | |
fefd409b | 729 | ret = event_agent_disable(usess, agt, "*"); |
0dcfcf94 DG |
730 | if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_NOT_FOUND) { |
731 | goto error; | |
f20baf8e DG |
732 | } |
733 | ||
b9866e08 | 734 | /* Disable every event. */ |
f20baf8e | 735 | rcu_read_lock(); |
fefd409b | 736 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent, |
f20baf8e | 737 | node.node) { |
0dcfcf94 DG |
738 | if (!aevent->enabled) { |
739 | continue; | |
740 | } | |
741 | ||
742 | ret = event_agent_disable(usess, agt, aevent->name); | |
743 | if (ret != LTTNG_OK) { | |
b9866e08 | 744 | goto error_unlock; |
f20baf8e | 745 | } |
f20baf8e | 746 | } |
f20baf8e DG |
747 | ret = LTTNG_OK; |
748 | ||
b9866e08 JG |
749 | error_unlock: |
750 | rcu_read_unlock(); | |
f20baf8e DG |
751 | error: |
752 | return ret; | |
753 | } |