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" |
9df8df5e | 34 | #include "ust-ctl.h" |
edb67388 DG |
35 | #include "ust-app.h" |
36 | #include "trace-kernel.h" | |
37 | #include "trace-ust.h" | |
7c1d2758 | 38 | #include "agent.h" |
54d01ffb | 39 | |
025faf73 DG |
40 | /* |
41 | * Add unique UST event based on the event name, filter bytecode and loglevel. | |
42 | */ | |
18eace3b DG |
43 | static void add_unique_ust_event(struct lttng_ht *ht, |
44 | struct ltt_ust_event *event) | |
45 | { | |
46 | struct cds_lfht_node *node_ptr; | |
47 | struct ltt_ust_ht_key key; | |
48 | ||
49 | assert(ht); | |
50 | assert(ht->ht); | |
51 | assert(event); | |
52 | ||
53 | key.name = event->attr.name; | |
54 | key.filter = (struct lttng_filter_bytecode *) event->filter; | |
b953b8cd PP |
55 | key.loglevel_type = event->attr.loglevel_type; |
56 | key.loglevel_value = event->attr.loglevel; | |
4031e53e | 57 | key.exclusion = event->exclusion; |
18eace3b DG |
58 | |
59 | node_ptr = cds_lfht_add_unique(ht->ht, | |
60 | ht->hash_fct(event->node.key, lttng_ht_seed), | |
61 | trace_ust_ht_match_event, &key, &event->node.node); | |
62 | assert(node_ptr == &event->node.node); | |
63 | } | |
64 | ||
54d01ffb | 65 | /* |
9550ee81 JR |
66 | * Disable kernel tracepoint events for a channel from the kernel session of |
67 | * a specified event_name and event type. | |
68 | * On type LTTNG_EVENT_ALL all events with event_name are disabled. | |
69 | * If event_name is NULL all events of the specified type are disabled. | |
54d01ffb | 70 | */ |
d0ae4ea8 | 71 | int event_kernel_disable_event(struct ltt_kernel_channel *kchan, |
9550ee81 | 72 | char *event_name, enum lttng_event_type type) |
54d01ffb | 73 | { |
9550ee81 | 74 | int ret, error = 0, found = 0; |
54d01ffb DG |
75 | struct ltt_kernel_event *kevent; |
76 | ||
0525e9ae DG |
77 | assert(kchan); |
78 | ||
54d01ffb DG |
79 | /* For each event in the kernel session */ |
80 | cds_list_for_each_entry(kevent, &kchan->events_list.head, list) { | |
d0ae4ea8 MD |
81 | if (type != LTTNG_EVENT_ALL && kevent->type != type) |
82 | continue; | |
9550ee81 JR |
83 | if (event_name != NULL && strcmp(event_name, kevent->event->name)) { |
84 | continue; | |
85 | } | |
86 | found++; | |
54d01ffb DG |
87 | ret = kernel_disable_event(kevent); |
88 | if (ret < 0) { | |
9550ee81 | 89 | error = 1; |
54d01ffb DG |
90 | continue; |
91 | } | |
92 | } | |
9550ee81 JR |
93 | DBG("Disable kernel event: found %d events with name: %s and type: %d", |
94 | found, event_name ? event_name : "NULL", type); | |
7a3d1328 | 95 | |
9550ee81 JR |
96 | if (event_name != NULL && !found) { |
97 | ret = LTTNG_ERR_NO_EVENT; | |
98 | } else { | |
99 | ret = error ? LTTNG_ERR_KERN_DISABLE_FAIL : LTTNG_OK; | |
100 | } | |
101 | ||
102 | return ret; | |
54d01ffb DG |
103 | } |
104 | ||
105 | /* | |
7a3d1328 | 106 | * Enable kernel tracepoint event for a channel from the kernel session. |
49d21f93 | 107 | * We own filter_expression and filter. |
54d01ffb | 108 | */ |
d0ae4ea8 | 109 | int event_kernel_enable_event(struct ltt_kernel_channel *kchan, |
00a62084 MD |
110 | struct lttng_event *event, char *filter_expression, |
111 | struct lttng_filter_bytecode *filter) | |
54d01ffb DG |
112 | { |
113 | int ret; | |
114 | struct ltt_kernel_event *kevent; | |
115 | ||
0525e9ae DG |
116 | assert(kchan); |
117 | assert(event); | |
118 | ||
00a62084 MD |
119 | kevent = trace_kernel_find_event(event->name, kchan, |
120 | event->type, filter); | |
54d01ffb | 121 | if (kevent == NULL) { |
71a3bb01 | 122 | ret = kernel_create_event(event, kchan, filter_expression, filter); |
a969e101 MD |
123 | /* We have passed ownership */ |
124 | filter_expression = NULL; | |
125 | filter = NULL; | |
71a3bb01 | 126 | if (ret) { |
7a3d1328 | 127 | goto end; |
54d01ffb DG |
128 | } |
129 | } else if (kevent->enabled == 0) { | |
130 | ret = kernel_enable_event(kevent); | |
131 | if (ret < 0) { | |
f73fabfd | 132 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
7a3d1328 | 133 | goto end; |
54d01ffb | 134 | } |
42224349 DG |
135 | } else { |
136 | /* At this point, the event is considered enabled */ | |
f73fabfd | 137 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
42224349 | 138 | goto end; |
54d01ffb | 139 | } |
42224349 | 140 | |
f73fabfd | 141 | ret = LTTNG_OK; |
7a3d1328 | 142 | end: |
a969e101 MD |
143 | free(filter_expression); |
144 | free(filter); | |
54d01ffb DG |
145 | return ret; |
146 | } | |
147 | ||
7f79d3a1 DG |
148 | /* |
149 | * ============================ | |
150 | * UST : The Ultimate Frontier! | |
151 | * ============================ | |
152 | */ | |
153 | ||
2bdd86d4 MD |
154 | /* |
155 | * Enable UST tracepoint event for a channel from a UST session. | |
49d21f93 | 156 | * We own filter_expression, filter, and exclusion. |
2bdd86d4 | 157 | */ |
7972aab2 | 158 | int event_ust_enable_tracepoint(struct ltt_ust_session *usess, |
025faf73 | 159 | struct ltt_ust_channel *uchan, struct lttng_event *event, |
6b453b5e | 160 | char *filter_expression, |
f1613f52 | 161 | struct lttng_filter_bytecode *filter, |
88f06f15 JG |
162 | struct lttng_event_exclusion *exclusion, |
163 | bool internal_event) | |
2bdd86d4 | 164 | { |
39687410 | 165 | int ret, to_create = 0; |
edb67388 DG |
166 | struct ltt_ust_event *uevent; |
167 | ||
0525e9ae DG |
168 | assert(usess); |
169 | assert(uchan); | |
170 | assert(event); | |
171 | ||
18eace3b DG |
172 | rcu_read_lock(); |
173 | ||
025faf73 | 174 | uevent = trace_ust_find_event(uchan->events, event->name, filter, |
b953b8cd | 175 | event->loglevel_type, event->loglevel, exclusion); |
87c6e328 | 176 | if (!uevent) { |
39687410 FD |
177 | ret = trace_ust_create_event(event, filter_expression, |
178 | filter, exclusion, internal_event, &uevent); | |
49d21f93 MD |
179 | /* We have passed ownership */ |
180 | filter_expression = NULL; | |
181 | filter = NULL; | |
182 | exclusion = NULL; | |
39687410 | 183 | if (ret != LTTNG_OK) { |
edb67388 DG |
184 | goto error; |
185 | } | |
025faf73 | 186 | |
fc34caaa | 187 | /* Valid to set it after the goto error since uevent is still NULL */ |
edb67388 DG |
188 | to_create = 1; |
189 | } | |
2bdd86d4 | 190 | |
7f79d3a1 DG |
191 | if (uevent->enabled) { |
192 | /* It's already enabled so everything is OK */ | |
5bcdda4f | 193 | ret = LTTNG_ERR_UST_EVENT_ENABLED; |
7f79d3a1 DG |
194 | goto end; |
195 | } | |
196 | ||
fc34caaa DG |
197 | uevent->enabled = 1; |
198 | ||
7972aab2 DG |
199 | if (to_create) { |
200 | /* Create event on all UST registered apps for session */ | |
201 | ret = ust_app_create_event_glb(usess, uchan, uevent); | |
202 | } else { | |
203 | /* Enable event on all UST registered apps for session */ | |
204 | ret = ust_app_enable_event_glb(usess, uchan, uevent); | |
205 | } | |
48842b30 | 206 | |
7972aab2 DG |
207 | if (ret < 0) { |
208 | if (ret == -LTTNG_UST_ERR_EXIST) { | |
209 | ret = LTTNG_ERR_UST_EVENT_EXIST; | |
210 | goto end; | |
211 | } else { | |
212 | ret = LTTNG_ERR_UST_ENABLE_FAIL; | |
213 | goto error; | |
edb67388 | 214 | } |
2bdd86d4 | 215 | } |
48842b30 | 216 | |
7f79d3a1 | 217 | if (to_create) { |
fc34caaa | 218 | /* Add ltt ust event to channel */ |
18eace3b | 219 | add_unique_ust_event(uchan->events, uevent); |
7f79d3a1 | 220 | } |
edb67388 | 221 | |
7f79d3a1 DG |
222 | DBG("Event UST %s %s in channel %s", uevent->attr.name, |
223 | to_create ? "created" : "enabled", uchan->name); | |
224 | ||
f73fabfd | 225 | ret = LTTNG_OK; |
fc34caaa | 226 | |
fb89d070 | 227 | end: |
18eace3b | 228 | rcu_read_unlock(); |
49d21f93 MD |
229 | free(filter_expression); |
230 | free(filter); | |
231 | free(exclusion); | |
fc34caaa | 232 | return ret; |
edb67388 DG |
233 | |
234 | error: | |
fc34caaa DG |
235 | /* |
236 | * Only destroy event on creation time (not enabling time) because if the | |
237 | * event is found in the channel (to_create == 0), it means that at some | |
238 | * point the enable_event worked and it's thus valid to keep it alive. | |
239 | * Destroying it also implies that we also destroy it's shadow copy to sync | |
240 | * everyone up. | |
241 | */ | |
242 | if (to_create) { | |
243 | /* In this code path, the uevent was not added to the hash table */ | |
244 | trace_ust_destroy_event(uevent); | |
245 | } | |
18eace3b | 246 | rcu_read_unlock(); |
49d21f93 MD |
247 | free(filter_expression); |
248 | free(filter); | |
249 | free(exclusion); | |
2bdd86d4 MD |
250 | return ret; |
251 | } | |
252 | ||
7f79d3a1 DG |
253 | /* |
254 | * Disable UST tracepoint of a channel from a UST session. | |
255 | */ | |
7972aab2 | 256 | int event_ust_disable_tracepoint(struct ltt_ust_session *usess, |
7f79d3a1 | 257 | struct ltt_ust_channel *uchan, char *event_name) |
2bdd86d4 MD |
258 | { |
259 | int ret; | |
7f79d3a1 | 260 | struct ltt_ust_event *uevent; |
18eace3b DG |
261 | struct lttng_ht_node_str *node; |
262 | struct lttng_ht_iter iter; | |
18eace3b | 263 | struct lttng_ht *ht; |
2bdd86d4 | 264 | |
0525e9ae DG |
265 | assert(usess); |
266 | assert(uchan); | |
267 | assert(event_name); | |
268 | ||
18eace3b DG |
269 | ht = uchan->events; |
270 | ||
18eace3b | 271 | rcu_read_lock(); |
025faf73 DG |
272 | |
273 | /* | |
274 | * We use a custom lookup since we need the iterator for the next_duplicate | |
275 | * call in the do while loop below. | |
276 | */ | |
277 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) event_name, lttng_ht_seed), | |
278 | trace_ust_ht_match_event_by_name, event_name, &iter.iter); | |
18eace3b DG |
279 | node = lttng_ht_iter_get_node_str(&iter); |
280 | if (node == NULL) { | |
281 | DBG2("Trace UST event NOT found by name %s", event_name); | |
f73fabfd | 282 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; |
7f79d3a1 | 283 | goto error; |
2bdd86d4 | 284 | } |
7f79d3a1 | 285 | |
18eace3b DG |
286 | do { |
287 | uevent = caa_container_of(node, struct ltt_ust_event, node); | |
025faf73 DG |
288 | assert(uevent); |
289 | ||
18eace3b DG |
290 | if (uevent->enabled == 0) { |
291 | /* It's already disabled so everything is OK */ | |
a1dcaf0f | 292 | goto next; |
7f79d3a1 | 293 | } |
18eace3b | 294 | |
7972aab2 DG |
295 | ret = ust_app_disable_event_glb(usess, uchan, uevent); |
296 | if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) { | |
297 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
18eace3b DG |
298 | goto error; |
299 | } | |
18eace3b DG |
300 | uevent->enabled = 0; |
301 | ||
025faf73 DG |
302 | DBG2("Event UST %s disabled in channel %s", uevent->attr.name, |
303 | uchan->name); | |
304 | ||
a1dcaf0f | 305 | next: |
18eace3b DG |
306 | /* Get next duplicate event by name. */ |
307 | cds_lfht_next_duplicate(ht->ht, trace_ust_ht_match_event_by_name, | |
308 | event_name, &iter.iter); | |
309 | node = lttng_ht_iter_get_node_str(&iter); | |
310 | } while (node); | |
7f79d3a1 | 311 | |
f73fabfd | 312 | ret = LTTNG_OK; |
7f79d3a1 | 313 | |
7f79d3a1 | 314 | error: |
18eace3b | 315 | rcu_read_unlock(); |
7f79d3a1 DG |
316 | return ret; |
317 | } | |
318 | ||
b1e7fe2d JR |
319 | /* |
320 | * Disable all UST tracepoints for a channel from a UST session. | |
321 | */ | |
322 | int event_ust_disable_all_tracepoints(struct ltt_ust_session *usess, | |
323 | struct ltt_ust_channel *uchan) | |
324 | { | |
3e81c0f2 | 325 | int ret, i, size, error = 0; |
b1e7fe2d JR |
326 | struct lttng_ht_iter iter; |
327 | struct ltt_ust_event *uevent = NULL; | |
328 | struct lttng_event *events = NULL; | |
329 | ||
330 | assert(usess); | |
331 | assert(uchan); | |
332 | ||
333 | rcu_read_lock(); | |
334 | ||
335 | /* Disabling existing events */ | |
336 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, | |
337 | node.node) { | |
338 | if (uevent->enabled == 1) { | |
339 | ret = event_ust_disable_tracepoint(usess, uchan, | |
340 | uevent->attr.name); | |
341 | if (ret < 0) { | |
3e81c0f2 | 342 | error = LTTNG_ERR_UST_DISABLE_FAIL; |
b1e7fe2d JR |
343 | continue; |
344 | } | |
345 | } | |
346 | } | |
347 | ||
348 | /* Get all UST available events */ | |
349 | size = ust_app_list_events(&events); | |
350 | if (size < 0) { | |
351 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
352 | goto error; | |
353 | } | |
354 | ||
355 | for (i = 0; i < size; i++) { | |
356 | ret = event_ust_disable_tracepoint(usess, uchan, | |
357 | events[i].name); | |
3e81c0f2 | 358 | if (ret < 0) { |
b1e7fe2d | 359 | /* Continue to disable the rest... */ |
3e81c0f2 | 360 | error = LTTNG_ERR_UST_DISABLE_FAIL; |
b1e7fe2d JR |
361 | continue; |
362 | } | |
363 | } | |
364 | ||
3e81c0f2 | 365 | ret = error ? error : LTTNG_OK; |
b1e7fe2d JR |
366 | error: |
367 | rcu_read_unlock(); | |
368 | free(events); | |
369 | return ret; | |
370 | } | |
371 | ||
f20baf8e | 372 | /* |
022d91ba | 373 | * Enable all agent event for a given UST session. |
f20baf8e DG |
374 | * |
375 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
376 | */ | |
022d91ba | 377 | int event_agent_enable_all(struct ltt_ust_session *usess, |
fefd409b | 378 | struct agent *agt, struct lttng_event *event, |
51755dc8 | 379 | struct lttng_filter_bytecode *filter ,char *filter_expression) |
f20baf8e DG |
380 | { |
381 | int ret; | |
fefd409b | 382 | struct agent_event *aevent; |
f20baf8e DG |
383 | struct lttng_ht_iter iter; |
384 | ||
385 | assert(usess); | |
386 | ||
022d91ba | 387 | DBG("Event agent enabling ALL events for session %" PRIu64, usess->id); |
f20baf8e | 388 | |
022d91ba | 389 | /* Enable event on agent application through TCP socket. */ |
8404118c | 390 | ret = event_agent_enable(usess, agt, event, filter, filter_expression); |
f20baf8e DG |
391 | if (ret != LTTNG_OK) { |
392 | goto error; | |
393 | } | |
394 | ||
395 | /* Flag every event that they are now enabled. */ | |
396 | rcu_read_lock(); | |
fefd409b | 397 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent, |
f20baf8e | 398 | node.node) { |
fefd409b | 399 | aevent->enabled = 1; |
f20baf8e DG |
400 | } |
401 | rcu_read_unlock(); | |
402 | ||
403 | ret = LTTNG_OK; | |
404 | ||
405 | error: | |
406 | return ret; | |
407 | } | |
408 | ||
71a559f8 JG |
409 | /* |
410 | * Check if this event's filter requires the activation of application contexts | |
411 | * and enable them in the agent. | |
b4bc01f7 MD |
412 | * TODO: bytecode iterator does not support non-legacy application |
413 | * contexts yet. Not an issue for now, since they are not generated by | |
414 | * the lttng-ctl library. | |
71a559f8 JG |
415 | */ |
416 | static int add_filter_app_ctx(struct lttng_filter_bytecode *bytecode, | |
417 | const char *filter_expression, struct agent *agt) | |
418 | { | |
419 | int ret = LTTNG_OK; | |
420 | char *provider_name = NULL, *ctx_name = NULL; | |
421 | struct bytecode_symbol_iterator *it = | |
422 | bytecode_symbol_iterator_create(bytecode); | |
423 | ||
424 | if (!it) { | |
425 | ret = LTTNG_ERR_NOMEM; | |
426 | goto end; | |
427 | } | |
428 | ||
429 | do { | |
430 | struct lttng_event_context ctx; | |
431 | const char *symbol_name = | |
432 | bytecode_symbol_iterator_get_name(it); | |
433 | ||
434 | if (parse_application_context(symbol_name, &provider_name, | |
435 | &ctx_name)) { | |
436 | /* Not an application context. */ | |
437 | continue; | |
438 | } | |
439 | ||
440 | ctx.ctx = LTTNG_EVENT_CONTEXT_APP_CONTEXT; | |
441 | ctx.u.app_ctx.provider_name = provider_name; | |
442 | ctx.u.app_ctx.ctx_name = ctx_name; | |
443 | ||
444 | /* Recognized an application context. */ | |
445 | DBG("Enabling event with filter expression \"%s\" requires enabling the %s:%s application context.", | |
446 | filter_expression, provider_name, ctx_name); | |
447 | ||
448 | ret = agent_add_context(&ctx, agt); | |
449 | if (ret != LTTNG_OK) { | |
450 | ERR("Failed to add application context %s:%s.", | |
451 | provider_name, ctx_name); | |
452 | goto end; | |
453 | } | |
454 | ||
455 | ret = agent_enable_context(&ctx, agt->domain); | |
456 | if (ret != LTTNG_OK) { | |
457 | ERR("Failed to enable application context %s:%s.", | |
458 | provider_name, ctx_name); | |
459 | goto end; | |
460 | } | |
461 | ||
462 | free(provider_name); | |
463 | free(ctx_name); | |
464 | provider_name = ctx_name = NULL; | |
465 | } while (bytecode_symbol_iterator_next(it) == 0); | |
466 | end: | |
467 | free(provider_name); | |
468 | free(ctx_name); | |
469 | bytecode_symbol_iterator_destroy(it); | |
470 | return ret; | |
471 | } | |
472 | ||
f20baf8e | 473 | /* |
022d91ba | 474 | * Enable a single agent event for a given UST session. |
f20baf8e DG |
475 | * |
476 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
477 | */ | |
fefd409b DG |
478 | int event_agent_enable(struct ltt_ust_session *usess, |
479 | struct agent *agt, struct lttng_event *event, | |
8404118c JG |
480 | struct lttng_filter_bytecode *filter, |
481 | char *filter_expression) | |
f20baf8e DG |
482 | { |
483 | int ret, created = 0; | |
fefd409b | 484 | struct agent_event *aevent; |
f20baf8e DG |
485 | |
486 | assert(usess); | |
487 | assert(event); | |
fefd409b | 488 | assert(agt); |
f20baf8e | 489 | |
022d91ba | 490 | DBG("Event agent enabling %s for session %" PRIu64 " with loglevel type %d " |
51755dc8 JG |
491 | ", loglevel %d and filter \"%s\"", event->name, |
492 | usess->id, event->loglevel_type, event->loglevel, | |
493 | filter_expression ? filter_expression : "NULL"); | |
f20baf8e | 494 | |
a9319624 | 495 | aevent = agent_find_event(event->name, event->loglevel_type, |
71a559f8 | 496 | event->loglevel, filter_expression, agt); |
fefd409b | 497 | if (!aevent) { |
a9319624 PP |
498 | aevent = agent_create_event(event->name, event->loglevel_type, |
499 | event->loglevel, filter, | |
51755dc8 | 500 | filter_expression); |
fefd409b | 501 | if (!aevent) { |
f20baf8e DG |
502 | ret = LTTNG_ERR_NOMEM; |
503 | goto error; | |
504 | } | |
71a559f8 | 505 | |
f20baf8e DG |
506 | created = 1; |
507 | } | |
508 | ||
509 | /* Already enabled? */ | |
fefd409b | 510 | if (aevent->enabled) { |
f20baf8e DG |
511 | goto end; |
512 | } | |
513 | ||
71a559f8 JG |
514 | if (created && filter) { |
515 | ret = add_filter_app_ctx(filter, filter_expression, agt); | |
516 | if (ret != LTTNG_OK) { | |
517 | goto error; | |
518 | } | |
519 | } | |
520 | ||
fefd409b | 521 | ret = agent_enable_event(aevent, agt->domain); |
f20baf8e DG |
522 | if (ret != LTTNG_OK) { |
523 | goto error; | |
524 | } | |
525 | ||
526 | /* If the event was created prior to the enable, add it to the domain. */ | |
527 | if (created) { | |
fefd409b | 528 | agent_add_event(aevent, agt); |
f20baf8e DG |
529 | } |
530 | ||
531 | end: | |
532 | return LTTNG_OK; | |
533 | ||
534 | error: | |
535 | if (created) { | |
fefd409b | 536 | agent_destroy_event(aevent); |
f20baf8e DG |
537 | } |
538 | return ret; | |
539 | } | |
540 | ||
da6c3a50 | 541 | /* |
d1ec8e20 JG |
542 | * Return the default event name associated with the provided UST domain. Return |
543 | * NULL on error. | |
da6c3a50 DG |
544 | */ |
545 | const char *event_get_default_agent_ust_name(enum lttng_domain_type domain) | |
546 | { | |
547 | const char *default_event_name = NULL; | |
548 | ||
0e115563 DG |
549 | switch (domain) { |
550 | case LTTNG_DOMAIN_LOG4J: | |
d1ec8e20 | 551 | default_event_name = DEFAULT_LOG4J_EVENT_NAME; |
0e115563 DG |
552 | break; |
553 | case LTTNG_DOMAIN_JUL: | |
d1ec8e20 | 554 | default_event_name = DEFAULT_JUL_EVENT_NAME; |
0e115563 DG |
555 | break; |
556 | case LTTNG_DOMAIN_PYTHON: | |
e7c82272 | 557 | default_event_name = DEFAULT_PYTHON_EVENT_NAME; |
0e115563 DG |
558 | break; |
559 | default: | |
da6c3a50 DG |
560 | assert(0); |
561 | } | |
562 | ||
563 | return default_event_name; | |
564 | } | |
565 | ||
f20baf8e | 566 | /* |
e261a6cc | 567 | * Disable a given agent event for a given UST session. |
f20baf8e | 568 | * |
e261a6cc | 569 | * Must be called with the RCU read lock held. |
f20baf8e DG |
570 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. |
571 | */ | |
e261a6cc PP |
572 | static int event_agent_disable_one(struct ltt_ust_session *usess, |
573 | struct agent *agt, struct agent_event *aevent) | |
f20baf8e DG |
574 | { |
575 | int ret; | |
be6a6276 DG |
576 | struct ltt_ust_event *uevent = NULL; |
577 | struct ltt_ust_channel *uchan = NULL; | |
71aecbf8 | 578 | const char *ust_event_name, *ust_channel_name; |
f20baf8e | 579 | |
fefd409b | 580 | assert(agt); |
f20baf8e | 581 | assert(usess); |
e261a6cc | 582 | assert(aevent); |
f20baf8e | 583 | |
e261a6cc PP |
584 | DBG("Event agent disabling %s (loglevel type %d, loglevel value %d) for session %" PRIu64, |
585 | aevent->name, aevent->loglevel_type, aevent->loglevel_value, | |
586 | usess->id); | |
f20baf8e DG |
587 | |
588 | /* Already disabled? */ | |
fefd409b | 589 | if (!aevent->enabled) { |
f20baf8e DG |
590 | goto end; |
591 | } | |
592 | ||
71aecbf8 DG |
593 | if (agt->domain == LTTNG_DOMAIN_JUL) { |
594 | ust_channel_name = DEFAULT_JUL_CHANNEL_NAME; | |
595 | } else if (agt->domain == LTTNG_DOMAIN_LOG4J) { | |
596 | ust_channel_name = DEFAULT_LOG4J_CHANNEL_NAME; | |
0e115563 DG |
597 | } else if (agt->domain == LTTNG_DOMAIN_PYTHON) { |
598 | ust_channel_name = DEFAULT_PYTHON_CHANNEL_NAME; | |
71aecbf8 DG |
599 | } else { |
600 | ret = LTTNG_ERR_INVALID; | |
601 | goto error; | |
602 | } | |
603 | ||
be6a6276 DG |
604 | /* |
605 | * Disable it on the UST side. First get the channel reference then find | |
606 | * the event and finally disable it. | |
607 | */ | |
608 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
71aecbf8 | 609 | (char *) ust_channel_name); |
be6a6276 DG |
610 | if (!uchan) { |
611 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
612 | goto error; | |
613 | } | |
614 | ||
da6c3a50 DG |
615 | ust_event_name = event_get_default_agent_ust_name(agt->domain); |
616 | if (!ust_event_name) { | |
617 | ret = LTTNG_ERR_FATAL; | |
618 | goto error; | |
be6a6276 DG |
619 | } |
620 | ||
621 | /* | |
b953b8cd PP |
622 | * Agent UST event has its loglevel type forced to |
623 | * LTTNG_UST_LOGLEVEL_ALL. The actual loglevel type/value filtering | |
624 | * happens thanks to an UST filter. The following -1 is actually | |
625 | * ignored since the type is LTTNG_UST_LOGLEVEL_ALL. | |
be6a6276 | 626 | */ |
da6c3a50 | 627 | uevent = trace_ust_find_event(uchan->events, (char *) ust_event_name, |
b953b8cd | 628 | aevent->filter, LTTNG_UST_LOGLEVEL_ALL, -1, NULL); |
022d91ba | 629 | /* If the agent event exists, it must be available on the UST side. */ |
be6a6276 DG |
630 | assert(uevent); |
631 | ||
632 | ret = ust_app_disable_event_glb(usess, uchan, uevent); | |
633 | if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) { | |
634 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
635 | goto error; | |
636 | } | |
637 | ||
0dcfcf94 DG |
638 | /* |
639 | * Flag event that it's disabled so the shadow copy on the ust app side | |
640 | * will disable it if an application shows up. | |
641 | */ | |
642 | uevent->enabled = 0; | |
643 | ||
fefd409b | 644 | ret = agent_disable_event(aevent, agt->domain); |
f20baf8e DG |
645 | if (ret != LTTNG_OK) { |
646 | goto error; | |
647 | } | |
648 | ||
649 | end: | |
650 | return LTTNG_OK; | |
651 | ||
652 | error: | |
653 | return ret; | |
654 | } | |
e261a6cc PP |
655 | |
656 | /* | |
657 | * Disable all agent events matching a given name for a given UST session. | |
658 | * | |
659 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
660 | */ | |
661 | int event_agent_disable(struct ltt_ust_session *usess, struct agent *agt, | |
662 | char *event_name) | |
663 | { | |
664 | int ret = LTTNG_OK; | |
665 | struct agent_event *aevent; | |
666 | struct lttng_ht_iter iter; | |
667 | struct lttng_ht_node_str *node; | |
668 | ||
669 | assert(agt); | |
670 | assert(usess); | |
671 | assert(event_name); | |
672 | ||
673 | DBG("Event agent disabling %s (all loglevels) for session %" PRIu64, event_name, usess->id); | |
674 | ||
675 | rcu_read_lock(); | |
676 | agent_find_events_by_name(event_name, agt, &iter); | |
677 | node = lttng_ht_iter_get_node_str(&iter); | |
678 | ||
679 | if (node == NULL) { | |
680 | DBG2("Event agent NOT found by name %s", event_name); | |
681 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
682 | goto end; | |
683 | } | |
684 | ||
685 | do { | |
686 | aevent = caa_container_of(node, struct agent_event, node); | |
687 | ret = event_agent_disable_one(usess, agt, aevent); | |
688 | ||
689 | if (ret != LTTNG_OK) { | |
690 | goto end; | |
691 | } | |
692 | ||
693 | /* Get next duplicate agent event by name. */ | |
694 | agent_event_next_duplicate(event_name, agt, &iter); | |
695 | node = lttng_ht_iter_get_node_str(&iter); | |
696 | } while (node); | |
697 | end: | |
698 | rcu_read_unlock(); | |
699 | return ret; | |
700 | } | |
f20baf8e | 701 | /* |
022d91ba | 702 | * Disable all agent event for a given UST session. |
f20baf8e DG |
703 | * |
704 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
705 | */ | |
fefd409b DG |
706 | int event_agent_disable_all(struct ltt_ust_session *usess, |
707 | struct agent *agt) | |
f20baf8e | 708 | { |
0dcfcf94 | 709 | int ret; |
fefd409b | 710 | struct agent_event *aevent; |
f20baf8e DG |
711 | struct lttng_ht_iter iter; |
712 | ||
fefd409b | 713 | assert(agt); |
f20baf8e DG |
714 | assert(usess); |
715 | ||
0dcfcf94 DG |
716 | /* |
717 | * Disable event on agent application. Continue to disable all other events | |
718 | * if the * event is not found. | |
719 | */ | |
fefd409b | 720 | ret = event_agent_disable(usess, agt, "*"); |
0dcfcf94 DG |
721 | if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_NOT_FOUND) { |
722 | goto error; | |
f20baf8e DG |
723 | } |
724 | ||
b9866e08 | 725 | /* Disable every event. */ |
f20baf8e | 726 | rcu_read_lock(); |
fefd409b | 727 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent, |
f20baf8e | 728 | node.node) { |
0dcfcf94 DG |
729 | if (!aevent->enabled) { |
730 | continue; | |
731 | } | |
732 | ||
733 | ret = event_agent_disable(usess, agt, aevent->name); | |
734 | if (ret != LTTNG_OK) { | |
b9866e08 | 735 | goto error_unlock; |
f20baf8e | 736 | } |
f20baf8e | 737 | } |
f20baf8e DG |
738 | ret = LTTNG_OK; |
739 | ||
b9866e08 JG |
740 | error_unlock: |
741 | rcu_read_unlock(); | |
f20baf8e DG |
742 | error: |
743 | return ret; | |
744 | } |