Commit | Line | Data |
---|---|---|
54d01ffb DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
71a559f8 | 3 | * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
54d01ffb | 4 | * |
d14d33bf AM |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License, version 2 only, | |
7 | * as published by the Free Software Foundation. | |
54d01ffb | 8 | * |
d14d33bf AM |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
54d01ffb | 13 | * |
d14d33bf AM |
14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
54d01ffb DG |
17 | */ |
18 | ||
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> |
71a559f8 JG |
27 | #include <common/filter.h> |
28 | #include <common/context.h> | |
54d01ffb DG |
29 | |
30 | #include "channel.h" | |
31 | #include "event.h" | |
4771f025 | 32 | #include "kernel.h" |
be6a6276 | 33 | #include "lttng-sessiond.h" |
b7340b1d JG |
34 | #include "lttng-ust-ctl.h" |
35 | #include "lttng-ust-error.h" | |
edb67388 DG |
36 | #include "ust-app.h" |
37 | #include "trace-kernel.h" | |
38 | #include "trace-ust.h" | |
7c1d2758 | 39 | #include "agent.h" |
54d01ffb | 40 | |
025faf73 DG |
41 | /* |
42 | * Add unique UST event based on the event name, filter bytecode and loglevel. | |
43 | */ | |
18eace3b DG |
44 | static void add_unique_ust_event(struct lttng_ht *ht, |
45 | struct ltt_ust_event *event) | |
46 | { | |
47 | struct cds_lfht_node *node_ptr; | |
48 | struct ltt_ust_ht_key key; | |
49 | ||
50 | assert(ht); | |
51 | assert(ht->ht); | |
52 | assert(event); | |
53 | ||
54 | key.name = event->attr.name; | |
55 | key.filter = (struct lttng_filter_bytecode *) event->filter; | |
b953b8cd PP |
56 | key.loglevel_type = event->attr.loglevel_type; |
57 | key.loglevel_value = event->attr.loglevel; | |
4031e53e | 58 | key.exclusion = event->exclusion; |
18eace3b DG |
59 | |
60 | node_ptr = cds_lfht_add_unique(ht->ht, | |
61 | ht->hash_fct(event->node.key, lttng_ht_seed), | |
62 | trace_ust_ht_match_event, &key, &event->node.node); | |
63 | assert(node_ptr == &event->node.node); | |
64 | } | |
65 | ||
54d01ffb | 66 | /* |
9550ee81 JR |
67 | * Disable kernel tracepoint events for a channel from the kernel session of |
68 | * a specified event_name and event type. | |
69 | * On type LTTNG_EVENT_ALL all events with event_name are disabled. | |
70 | * If event_name is NULL all events of the specified type are disabled. | |
54d01ffb | 71 | */ |
d0ae4ea8 | 72 | int event_kernel_disable_event(struct ltt_kernel_channel *kchan, |
6938db9c | 73 | const char *event_name, enum lttng_event_type type) |
54d01ffb | 74 | { |
9550ee81 | 75 | int ret, error = 0, found = 0; |
54d01ffb DG |
76 | struct ltt_kernel_event *kevent; |
77 | ||
0525e9ae DG |
78 | assert(kchan); |
79 | ||
54d01ffb DG |
80 | /* For each event in the kernel session */ |
81 | cds_list_for_each_entry(kevent, &kchan->events_list.head, list) { | |
d0ae4ea8 MD |
82 | if (type != LTTNG_EVENT_ALL && kevent->type != type) |
83 | continue; | |
9550ee81 JR |
84 | if (event_name != NULL && strcmp(event_name, kevent->event->name)) { |
85 | continue; | |
86 | } | |
87 | found++; | |
54d01ffb DG |
88 | ret = kernel_disable_event(kevent); |
89 | if (ret < 0) { | |
9550ee81 | 90 | error = 1; |
54d01ffb DG |
91 | continue; |
92 | } | |
93 | } | |
9550ee81 JR |
94 | DBG("Disable kernel event: found %d events with name: %s and type: %d", |
95 | found, event_name ? event_name : "NULL", type); | |
7a3d1328 | 96 | |
9550ee81 JR |
97 | if (event_name != NULL && !found) { |
98 | ret = LTTNG_ERR_NO_EVENT; | |
99 | } else { | |
100 | ret = error ? LTTNG_ERR_KERN_DISABLE_FAIL : LTTNG_OK; | |
101 | } | |
102 | ||
103 | return ret; | |
54d01ffb DG |
104 | } |
105 | ||
106 | /* | |
7a3d1328 | 107 | * Enable kernel tracepoint event for a channel from the kernel session. |
49d21f93 | 108 | * We own filter_expression and filter. |
54d01ffb | 109 | */ |
d0ae4ea8 | 110 | int event_kernel_enable_event(struct ltt_kernel_channel *kchan, |
00a62084 MD |
111 | struct lttng_event *event, char *filter_expression, |
112 | struct lttng_filter_bytecode *filter) | |
54d01ffb DG |
113 | { |
114 | int ret; | |
115 | struct ltt_kernel_event *kevent; | |
116 | ||
0525e9ae DG |
117 | assert(kchan); |
118 | assert(event); | |
119 | ||
00a62084 MD |
120 | kevent = trace_kernel_find_event(event->name, kchan, |
121 | event->type, filter); | |
54d01ffb | 122 | if (kevent == NULL) { |
71a3bb01 | 123 | ret = kernel_create_event(event, kchan, filter_expression, filter); |
a969e101 MD |
124 | /* We have passed ownership */ |
125 | filter_expression = NULL; | |
126 | filter = NULL; | |
71a3bb01 | 127 | if (ret) { |
7a3d1328 | 128 | goto end; |
54d01ffb DG |
129 | } |
130 | } else if (kevent->enabled == 0) { | |
131 | ret = kernel_enable_event(kevent); | |
132 | if (ret < 0) { | |
f73fabfd | 133 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
7a3d1328 | 134 | goto end; |
54d01ffb | 135 | } |
42224349 DG |
136 | } else { |
137 | /* At this point, the event is considered enabled */ | |
f73fabfd | 138 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
42224349 | 139 | goto end; |
54d01ffb | 140 | } |
42224349 | 141 | |
f73fabfd | 142 | ret = LTTNG_OK; |
7a3d1328 | 143 | end: |
a969e101 MD |
144 | free(filter_expression); |
145 | free(filter); | |
54d01ffb DG |
146 | return ret; |
147 | } | |
148 | ||
7f79d3a1 DG |
149 | /* |
150 | * ============================ | |
151 | * UST : The Ultimate Frontier! | |
152 | * ============================ | |
153 | */ | |
154 | ||
2bdd86d4 MD |
155 | /* |
156 | * Enable UST tracepoint event for a channel from a UST session. | |
49d21f93 | 157 | * We own filter_expression, filter, and exclusion. |
2bdd86d4 | 158 | */ |
7972aab2 | 159 | int event_ust_enable_tracepoint(struct ltt_ust_session *usess, |
025faf73 | 160 | struct ltt_ust_channel *uchan, struct lttng_event *event, |
6b453b5e | 161 | char *filter_expression, |
f1613f52 | 162 | struct lttng_filter_bytecode *filter, |
88f06f15 JG |
163 | struct lttng_event_exclusion *exclusion, |
164 | bool internal_event) | |
2bdd86d4 | 165 | { |
0ce9aa93 | 166 | int ret = LTTNG_OK, to_create = 0; |
edb67388 DG |
167 | struct ltt_ust_event *uevent; |
168 | ||
0525e9ae DG |
169 | assert(usess); |
170 | assert(uchan); | |
171 | assert(event); | |
172 | ||
18eace3b DG |
173 | rcu_read_lock(); |
174 | ||
025faf73 | 175 | uevent = trace_ust_find_event(uchan->events, event->name, filter, |
466fafb8 JG |
176 | (enum lttng_ust_loglevel_type) event->loglevel_type, |
177 | event->loglevel, exclusion); | |
87c6e328 | 178 | if (!uevent) { |
39687410 FD |
179 | ret = trace_ust_create_event(event, filter_expression, |
180 | filter, exclusion, internal_event, &uevent); | |
49d21f93 MD |
181 | /* We have passed ownership */ |
182 | filter_expression = NULL; | |
183 | filter = NULL; | |
184 | exclusion = NULL; | |
39687410 | 185 | if (ret != LTTNG_OK) { |
b77e9a3d | 186 | goto end; |
edb67388 | 187 | } |
025faf73 | 188 | |
fc34caaa | 189 | /* Valid to set it after the goto error since uevent is still NULL */ |
edb67388 DG |
190 | to_create = 1; |
191 | } | |
2bdd86d4 | 192 | |
7f79d3a1 DG |
193 | if (uevent->enabled) { |
194 | /* It's already enabled so everything is OK */ | |
39543064 | 195 | assert(!to_create); |
5bcdda4f | 196 | ret = LTTNG_ERR_UST_EVENT_ENABLED; |
7f79d3a1 DG |
197 | goto end; |
198 | } | |
199 | ||
fc34caaa | 200 | uevent->enabled = 1; |
0ce9aa93 JG |
201 | if (to_create) { |
202 | /* Add ltt ust event to channel */ | |
203 | add_unique_ust_event(uchan->events, uevent); | |
204 | } | |
205 | ||
206 | if (!usess->active) { | |
207 | goto end; | |
208 | } | |
fc34caaa | 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; | |
7972aab2 DG |
221 | } else { |
222 | ret = LTTNG_ERR_UST_ENABLE_FAIL; | |
edb67388 | 223 | } |
b77e9a3d | 224 | goto end; |
2bdd86d4 | 225 | } |
48842b30 | 226 | |
7f79d3a1 DG |
227 | DBG("Event UST %s %s in channel %s", uevent->attr.name, |
228 | to_create ? "created" : "enabled", uchan->name); | |
229 | ||
f73fabfd | 230 | ret = LTTNG_OK; |
fc34caaa | 231 | |
fb89d070 | 232 | end: |
18eace3b | 233 | rcu_read_unlock(); |
49d21f93 MD |
234 | free(filter_expression); |
235 | free(filter); | |
236 | free(exclusion); | |
fc34caaa | 237 | return ret; |
2bdd86d4 MD |
238 | } |
239 | ||
7f79d3a1 DG |
240 | /* |
241 | * Disable UST tracepoint of a channel from a UST session. | |
242 | */ | |
7972aab2 | 243 | int event_ust_disable_tracepoint(struct ltt_ust_session *usess, |
6938db9c | 244 | struct ltt_ust_channel *uchan, const char *event_name) |
2bdd86d4 MD |
245 | { |
246 | int ret; | |
7f79d3a1 | 247 | struct ltt_ust_event *uevent; |
18eace3b DG |
248 | struct lttng_ht_node_str *node; |
249 | struct lttng_ht_iter iter; | |
18eace3b | 250 | struct lttng_ht *ht; |
2bdd86d4 | 251 | |
0525e9ae DG |
252 | assert(usess); |
253 | assert(uchan); | |
254 | assert(event_name); | |
255 | ||
18eace3b DG |
256 | ht = uchan->events; |
257 | ||
18eace3b | 258 | rcu_read_lock(); |
025faf73 DG |
259 | |
260 | /* | |
261 | * We use a custom lookup since we need the iterator for the next_duplicate | |
262 | * call in the do while loop below. | |
263 | */ | |
264 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) event_name, lttng_ht_seed), | |
265 | trace_ust_ht_match_event_by_name, event_name, &iter.iter); | |
18eace3b DG |
266 | node = lttng_ht_iter_get_node_str(&iter); |
267 | if (node == NULL) { | |
268 | DBG2("Trace UST event NOT found by name %s", event_name); | |
f73fabfd | 269 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; |
7f79d3a1 | 270 | goto error; |
2bdd86d4 | 271 | } |
7f79d3a1 | 272 | |
18eace3b DG |
273 | do { |
274 | uevent = caa_container_of(node, struct ltt_ust_event, node); | |
025faf73 DG |
275 | assert(uevent); |
276 | ||
18eace3b DG |
277 | if (uevent->enabled == 0) { |
278 | /* It's already disabled so everything is OK */ | |
a1dcaf0f | 279 | goto next; |
7f79d3a1 | 280 | } |
0ce9aa93 JG |
281 | uevent->enabled = 0; |
282 | DBG2("Event UST %s disabled in channel %s", uevent->attr.name, | |
283 | uchan->name); | |
18eace3b | 284 | |
0ce9aa93 JG |
285 | if (!usess->active) { |
286 | goto next; | |
287 | } | |
7972aab2 DG |
288 | ret = ust_app_disable_event_glb(usess, uchan, uevent); |
289 | if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) { | |
290 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
18eace3b DG |
291 | goto error; |
292 | } | |
a1dcaf0f | 293 | next: |
18eace3b DG |
294 | /* Get next duplicate event by name. */ |
295 | cds_lfht_next_duplicate(ht->ht, trace_ust_ht_match_event_by_name, | |
296 | event_name, &iter.iter); | |
297 | node = lttng_ht_iter_get_node_str(&iter); | |
298 | } while (node); | |
7f79d3a1 | 299 | |
f73fabfd | 300 | ret = LTTNG_OK; |
7f79d3a1 | 301 | |
7f79d3a1 | 302 | error: |
18eace3b | 303 | rcu_read_unlock(); |
7f79d3a1 DG |
304 | return ret; |
305 | } | |
306 | ||
b1e7fe2d JR |
307 | /* |
308 | * Disable all UST tracepoints for a channel from a UST session. | |
309 | */ | |
310 | int event_ust_disable_all_tracepoints(struct ltt_ust_session *usess, | |
311 | struct ltt_ust_channel *uchan) | |
312 | { | |
3e81c0f2 | 313 | int ret, i, size, error = 0; |
b1e7fe2d JR |
314 | struct lttng_ht_iter iter; |
315 | struct ltt_ust_event *uevent = NULL; | |
316 | struct lttng_event *events = NULL; | |
317 | ||
318 | assert(usess); | |
319 | assert(uchan); | |
320 | ||
321 | rcu_read_lock(); | |
322 | ||
323 | /* Disabling existing events */ | |
324 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, | |
325 | node.node) { | |
326 | if (uevent->enabled == 1) { | |
327 | ret = event_ust_disable_tracepoint(usess, uchan, | |
328 | uevent->attr.name); | |
329 | if (ret < 0) { | |
3e81c0f2 | 330 | error = LTTNG_ERR_UST_DISABLE_FAIL; |
b1e7fe2d JR |
331 | continue; |
332 | } | |
333 | } | |
334 | } | |
335 | ||
336 | /* Get all UST available events */ | |
337 | size = ust_app_list_events(&events); | |
338 | if (size < 0) { | |
339 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
340 | goto error; | |
341 | } | |
342 | ||
343 | for (i = 0; i < size; i++) { | |
344 | ret = event_ust_disable_tracepoint(usess, uchan, | |
345 | events[i].name); | |
3e81c0f2 | 346 | if (ret < 0) { |
b1e7fe2d | 347 | /* Continue to disable the rest... */ |
3e81c0f2 | 348 | error = LTTNG_ERR_UST_DISABLE_FAIL; |
b1e7fe2d JR |
349 | continue; |
350 | } | |
351 | } | |
352 | ||
3e81c0f2 | 353 | ret = error ? error : LTTNG_OK; |
b1e7fe2d JR |
354 | error: |
355 | rcu_read_unlock(); | |
356 | free(events); | |
357 | return ret; | |
358 | } | |
359 | ||
f20baf8e | 360 | /* |
022d91ba | 361 | * Enable all agent event for a given UST session. |
f20baf8e DG |
362 | * |
363 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
364 | */ | |
022d91ba | 365 | int event_agent_enable_all(struct ltt_ust_session *usess, |
fefd409b | 366 | struct agent *agt, struct lttng_event *event, |
51755dc8 | 367 | struct lttng_filter_bytecode *filter ,char *filter_expression) |
f20baf8e DG |
368 | { |
369 | int ret; | |
fefd409b | 370 | struct agent_event *aevent; |
f20baf8e DG |
371 | struct lttng_ht_iter iter; |
372 | ||
373 | assert(usess); | |
374 | ||
022d91ba | 375 | DBG("Event agent enabling ALL events for session %" PRIu64, usess->id); |
f20baf8e | 376 | |
022d91ba | 377 | /* Enable event on agent application through TCP socket. */ |
8404118c | 378 | ret = event_agent_enable(usess, agt, event, filter, filter_expression); |
f20baf8e DG |
379 | if (ret != LTTNG_OK) { |
380 | goto error; | |
381 | } | |
382 | ||
383 | /* Flag every event that they are now enabled. */ | |
384 | rcu_read_lock(); | |
fefd409b | 385 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent, |
f20baf8e | 386 | node.node) { |
fefd409b | 387 | aevent->enabled = 1; |
f20baf8e DG |
388 | } |
389 | rcu_read_unlock(); | |
390 | ||
391 | ret = LTTNG_OK; | |
392 | ||
393 | error: | |
394 | return ret; | |
395 | } | |
396 | ||
71a559f8 JG |
397 | /* |
398 | * Check if this event's filter requires the activation of application contexts | |
399 | * and enable them in the agent. | |
b4bc01f7 MD |
400 | * TODO: bytecode iterator does not support non-legacy application |
401 | * contexts yet. Not an issue for now, since they are not generated by | |
402 | * the lttng-ctl library. | |
71a559f8 JG |
403 | */ |
404 | static int add_filter_app_ctx(struct lttng_filter_bytecode *bytecode, | |
405 | const char *filter_expression, struct agent *agt) | |
406 | { | |
407 | int ret = LTTNG_OK; | |
408 | char *provider_name = NULL, *ctx_name = NULL; | |
409 | struct bytecode_symbol_iterator *it = | |
410 | bytecode_symbol_iterator_create(bytecode); | |
411 | ||
412 | if (!it) { | |
413 | ret = LTTNG_ERR_NOMEM; | |
414 | goto end; | |
415 | } | |
416 | ||
417 | do { | |
418 | struct lttng_event_context ctx; | |
419 | const char *symbol_name = | |
420 | bytecode_symbol_iterator_get_name(it); | |
421 | ||
422 | if (parse_application_context(symbol_name, &provider_name, | |
423 | &ctx_name)) { | |
424 | /* Not an application context. */ | |
425 | continue; | |
426 | } | |
427 | ||
428 | ctx.ctx = LTTNG_EVENT_CONTEXT_APP_CONTEXT; | |
429 | ctx.u.app_ctx.provider_name = provider_name; | |
430 | ctx.u.app_ctx.ctx_name = ctx_name; | |
431 | ||
432 | /* Recognized an application context. */ | |
433 | DBG("Enabling event with filter expression \"%s\" requires enabling the %s:%s application context.", | |
434 | filter_expression, provider_name, ctx_name); | |
435 | ||
436 | ret = agent_add_context(&ctx, agt); | |
437 | if (ret != LTTNG_OK) { | |
438 | ERR("Failed to add application context %s:%s.", | |
439 | provider_name, ctx_name); | |
440 | goto end; | |
441 | } | |
442 | ||
443 | ret = agent_enable_context(&ctx, agt->domain); | |
444 | if (ret != LTTNG_OK) { | |
445 | ERR("Failed to enable application context %s:%s.", | |
446 | provider_name, ctx_name); | |
447 | goto end; | |
448 | } | |
449 | ||
450 | free(provider_name); | |
451 | free(ctx_name); | |
452 | provider_name = ctx_name = NULL; | |
453 | } while (bytecode_symbol_iterator_next(it) == 0); | |
454 | end: | |
455 | free(provider_name); | |
456 | free(ctx_name); | |
457 | bytecode_symbol_iterator_destroy(it); | |
458 | return ret; | |
459 | } | |
460 | ||
f20baf8e | 461 | /* |
022d91ba | 462 | * Enable a single agent event for a given UST session. |
f20baf8e DG |
463 | * |
464 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
465 | */ | |
fefd409b DG |
466 | int event_agent_enable(struct ltt_ust_session *usess, |
467 | struct agent *agt, struct lttng_event *event, | |
8404118c JG |
468 | struct lttng_filter_bytecode *filter, |
469 | char *filter_expression) | |
f20baf8e DG |
470 | { |
471 | int ret, created = 0; | |
fefd409b | 472 | struct agent_event *aevent; |
f20baf8e DG |
473 | |
474 | assert(usess); | |
475 | assert(event); | |
fefd409b | 476 | assert(agt); |
f20baf8e | 477 | |
022d91ba | 478 | DBG("Event agent enabling %s for session %" PRIu64 " with loglevel type %d " |
51755dc8 JG |
479 | ", loglevel %d and filter \"%s\"", event->name, |
480 | usess->id, event->loglevel_type, event->loglevel, | |
481 | filter_expression ? filter_expression : "NULL"); | |
f20baf8e | 482 | |
a9319624 | 483 | aevent = agent_find_event(event->name, event->loglevel_type, |
71a559f8 | 484 | event->loglevel, filter_expression, agt); |
fefd409b | 485 | if (!aevent) { |
a9319624 PP |
486 | aevent = agent_create_event(event->name, event->loglevel_type, |
487 | event->loglevel, filter, | |
51755dc8 | 488 | filter_expression); |
fefd409b | 489 | if (!aevent) { |
f20baf8e DG |
490 | ret = LTTNG_ERR_NOMEM; |
491 | goto error; | |
492 | } | |
c3cf3d2b JG |
493 | filter = NULL; |
494 | filter_expression = NULL; | |
f20baf8e | 495 | created = 1; |
e7bd0fbb | 496 | assert(!aevent->enabled); |
f20baf8e DG |
497 | } |
498 | ||
6a007bc6 JR |
499 | if (created && aevent->filter) { |
500 | ret = add_filter_app_ctx( | |
501 | aevent->filter, aevent->filter_expression, agt); | |
71a559f8 JG |
502 | if (ret != LTTNG_OK) { |
503 | goto error; | |
504 | } | |
505 | } | |
506 | ||
0ce9aa93 JG |
507 | /* Already enabled? */ |
508 | if (aevent->enabled) { | |
509 | ret = LTTNG_OK; | |
510 | goto end; | |
511 | } | |
512 | ||
fefd409b | 513 | ret = agent_enable_event(aevent, agt->domain); |
f20baf8e DG |
514 | if (ret != LTTNG_OK) { |
515 | goto error; | |
516 | } | |
517 | ||
518 | /* If the event was created prior to the enable, add it to the domain. */ | |
519 | if (created) { | |
fefd409b | 520 | agent_add_event(aevent, agt); |
f20baf8e DG |
521 | } |
522 | ||
c3cf3d2b JG |
523 | ret = LTTNG_OK; |
524 | goto end; | |
f20baf8e DG |
525 | |
526 | error: | |
527 | if (created) { | |
fefd409b | 528 | agent_destroy_event(aevent); |
f20baf8e | 529 | } |
c3cf3d2b JG |
530 | end: |
531 | free(filter); | |
532 | free(filter_expression); | |
f20baf8e DG |
533 | return ret; |
534 | } | |
535 | ||
da6c3a50 | 536 | /* |
d1ec8e20 JG |
537 | * Return the default event name associated with the provided UST domain. Return |
538 | * NULL on error. | |
da6c3a50 DG |
539 | */ |
540 | const char *event_get_default_agent_ust_name(enum lttng_domain_type domain) | |
541 | { | |
542 | const char *default_event_name = NULL; | |
543 | ||
0e115563 DG |
544 | switch (domain) { |
545 | case LTTNG_DOMAIN_LOG4J: | |
d1ec8e20 | 546 | default_event_name = DEFAULT_LOG4J_EVENT_NAME; |
0e115563 DG |
547 | break; |
548 | case LTTNG_DOMAIN_JUL: | |
d1ec8e20 | 549 | default_event_name = DEFAULT_JUL_EVENT_NAME; |
0e115563 DG |
550 | break; |
551 | case LTTNG_DOMAIN_PYTHON: | |
e7c82272 | 552 | default_event_name = DEFAULT_PYTHON_EVENT_NAME; |
0e115563 DG |
553 | break; |
554 | default: | |
da6c3a50 DG |
555 | assert(0); |
556 | } | |
557 | ||
558 | return default_event_name; | |
559 | } | |
560 | ||
f20baf8e | 561 | /* |
e261a6cc | 562 | * Disable a given agent event for a given UST session. |
f20baf8e | 563 | * |
e261a6cc | 564 | * Must be called with the RCU read lock held. |
f20baf8e DG |
565 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. |
566 | */ | |
e261a6cc PP |
567 | static int event_agent_disable_one(struct ltt_ust_session *usess, |
568 | struct agent *agt, struct agent_event *aevent) | |
f20baf8e DG |
569 | { |
570 | int ret; | |
be6a6276 DG |
571 | struct ltt_ust_event *uevent = NULL; |
572 | struct ltt_ust_channel *uchan = NULL; | |
71aecbf8 | 573 | const char *ust_event_name, *ust_channel_name; |
f20baf8e | 574 | |
fefd409b | 575 | assert(agt); |
f20baf8e | 576 | assert(usess); |
e261a6cc | 577 | assert(aevent); |
f20baf8e | 578 | |
e261a6cc PP |
579 | DBG("Event agent disabling %s (loglevel type %d, loglevel value %d) for session %" PRIu64, |
580 | aevent->name, aevent->loglevel_type, aevent->loglevel_value, | |
581 | usess->id); | |
f20baf8e DG |
582 | |
583 | /* Already disabled? */ | |
fefd409b | 584 | if (!aevent->enabled) { |
f20baf8e DG |
585 | goto end; |
586 | } | |
587 | ||
71aecbf8 DG |
588 | if (agt->domain == LTTNG_DOMAIN_JUL) { |
589 | ust_channel_name = DEFAULT_JUL_CHANNEL_NAME; | |
590 | } else if (agt->domain == LTTNG_DOMAIN_LOG4J) { | |
591 | ust_channel_name = DEFAULT_LOG4J_CHANNEL_NAME; | |
0e115563 DG |
592 | } else if (agt->domain == LTTNG_DOMAIN_PYTHON) { |
593 | ust_channel_name = DEFAULT_PYTHON_CHANNEL_NAME; | |
71aecbf8 DG |
594 | } else { |
595 | ret = LTTNG_ERR_INVALID; | |
596 | goto error; | |
597 | } | |
598 | ||
be6a6276 DG |
599 | /* |
600 | * Disable it on the UST side. First get the channel reference then find | |
601 | * the event and finally disable it. | |
602 | */ | |
603 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
71aecbf8 | 604 | (char *) ust_channel_name); |
be6a6276 DG |
605 | if (!uchan) { |
606 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
607 | goto error; | |
608 | } | |
609 | ||
da6c3a50 DG |
610 | ust_event_name = event_get_default_agent_ust_name(agt->domain); |
611 | if (!ust_event_name) { | |
612 | ret = LTTNG_ERR_FATAL; | |
613 | goto error; | |
be6a6276 DG |
614 | } |
615 | ||
616 | /* | |
b953b8cd PP |
617 | * Agent UST event has its loglevel type forced to |
618 | * LTTNG_UST_LOGLEVEL_ALL. The actual loglevel type/value filtering | |
619 | * happens thanks to an UST filter. The following -1 is actually | |
620 | * ignored since the type is LTTNG_UST_LOGLEVEL_ALL. | |
be6a6276 | 621 | */ |
da6c3a50 | 622 | uevent = trace_ust_find_event(uchan->events, (char *) ust_event_name, |
b953b8cd | 623 | aevent->filter, LTTNG_UST_LOGLEVEL_ALL, -1, NULL); |
022d91ba | 624 | /* If the agent event exists, it must be available on the UST side. */ |
be6a6276 DG |
625 | assert(uevent); |
626 | ||
0ce9aa93 JG |
627 | if (usess->active) { |
628 | ret = ust_app_disable_event_glb(usess, uchan, uevent); | |
629 | if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) { | |
630 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
631 | goto error; | |
632 | } | |
be6a6276 DG |
633 | } |
634 | ||
0dcfcf94 DG |
635 | /* |
636 | * Flag event that it's disabled so the shadow copy on the ust app side | |
637 | * will disable it if an application shows up. | |
638 | */ | |
639 | uevent->enabled = 0; | |
640 | ||
fefd409b | 641 | ret = agent_disable_event(aevent, agt->domain); |
f20baf8e DG |
642 | if (ret != LTTNG_OK) { |
643 | goto error; | |
644 | } | |
645 | ||
646 | end: | |
647 | return LTTNG_OK; | |
648 | ||
649 | error: | |
650 | return ret; | |
651 | } | |
e261a6cc PP |
652 | |
653 | /* | |
654 | * Disable all agent events matching a given name for a given UST session. | |
655 | * | |
656 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
657 | */ | |
658 | int event_agent_disable(struct ltt_ust_session *usess, struct agent *agt, | |
6938db9c | 659 | const char *event_name) |
e261a6cc PP |
660 | { |
661 | int ret = LTTNG_OK; | |
662 | struct agent_event *aevent; | |
663 | struct lttng_ht_iter iter; | |
664 | struct lttng_ht_node_str *node; | |
665 | ||
666 | assert(agt); | |
667 | assert(usess); | |
668 | assert(event_name); | |
669 | ||
670 | DBG("Event agent disabling %s (all loglevels) for session %" PRIu64, event_name, usess->id); | |
671 | ||
672 | rcu_read_lock(); | |
673 | agent_find_events_by_name(event_name, agt, &iter); | |
674 | node = lttng_ht_iter_get_node_str(&iter); | |
675 | ||
676 | if (node == NULL) { | |
677 | DBG2("Event agent NOT found by name %s", event_name); | |
678 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
679 | goto end; | |
680 | } | |
681 | ||
682 | do { | |
683 | aevent = caa_container_of(node, struct agent_event, node); | |
684 | ret = event_agent_disable_one(usess, agt, aevent); | |
685 | ||
686 | if (ret != LTTNG_OK) { | |
687 | goto end; | |
688 | } | |
689 | ||
690 | /* Get next duplicate agent event by name. */ | |
691 | agent_event_next_duplicate(event_name, agt, &iter); | |
692 | node = lttng_ht_iter_get_node_str(&iter); | |
693 | } while (node); | |
694 | end: | |
695 | rcu_read_unlock(); | |
696 | return ret; | |
697 | } | |
f20baf8e | 698 | /* |
022d91ba | 699 | * Disable all agent event for a given UST session. |
f20baf8e DG |
700 | * |
701 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
702 | */ | |
fefd409b DG |
703 | int event_agent_disable_all(struct ltt_ust_session *usess, |
704 | struct agent *agt) | |
f20baf8e | 705 | { |
0dcfcf94 | 706 | int ret; |
fefd409b | 707 | struct agent_event *aevent; |
f20baf8e DG |
708 | struct lttng_ht_iter iter; |
709 | ||
fefd409b | 710 | assert(agt); |
f20baf8e DG |
711 | assert(usess); |
712 | ||
0dcfcf94 DG |
713 | /* |
714 | * Disable event on agent application. Continue to disable all other events | |
715 | * if the * event is not found. | |
716 | */ | |
fefd409b | 717 | ret = event_agent_disable(usess, agt, "*"); |
0dcfcf94 DG |
718 | if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_NOT_FOUND) { |
719 | goto error; | |
f20baf8e DG |
720 | } |
721 | ||
b9866e08 | 722 | /* Disable every event. */ |
f20baf8e | 723 | rcu_read_lock(); |
fefd409b | 724 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent, |
f20baf8e | 725 | node.node) { |
0dcfcf94 DG |
726 | if (!aevent->enabled) { |
727 | continue; | |
728 | } | |
729 | ||
730 | ret = event_agent_disable(usess, agt, aevent->name); | |
731 | if (ret != LTTNG_OK) { | |
b9866e08 | 732 | goto error_unlock; |
f20baf8e | 733 | } |
f20baf8e | 734 | } |
f20baf8e DG |
735 | ret = LTTNG_OK; |
736 | ||
b9866e08 JG |
737 | error_unlock: |
738 | rcu_read_unlock(); | |
f20baf8e DG |
739 | error: |
740 | return ret; | |
741 | } |