Commit | Line | Data |
---|---|---|
54d01ffb | 1 | /* |
ab5be9fa MJ |
2 | * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca> |
3 | * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
54d01ffb | 4 | * |
ab5be9fa | 5 | * SPDX-License-Identifier: GPL-2.0-only |
54d01ffb | 6 | * |
54d01ffb DG |
7 | */ |
8 | ||
6c1c0768 | 9 | #define _LGPL_SOURCE |
54d01ffb | 10 | #include <urcu/list.h> |
2bdd86d4 | 11 | #include <string.h> |
54d01ffb | 12 | |
edf4b93e | 13 | #include <common/compat/errno.h> |
54d01ffb | 14 | #include <lttng/lttng.h> |
44760c20 JR |
15 | #include <lttng/condition/condition.h> |
16 | #include <lttng/condition/event-rule.h> | |
17 | #include <lttng/event-rule/event-rule.h> | |
18 | #include <lttng/event-rule/event-rule-internal.h> | |
db758600 | 19 | #include <common/error.h> |
10a8a223 | 20 | #include <common/sessiond-comm/sessiond-comm.h> |
71a559f8 JG |
21 | #include <common/filter.h> |
22 | #include <common/context.h> | |
54d01ffb DG |
23 | |
24 | #include "channel.h" | |
25 | #include "event.h" | |
4771f025 | 26 | #include "kernel.h" |
be6a6276 | 27 | #include "lttng-sessiond.h" |
75018ab6 JG |
28 | #include "lttng-ust-ctl.h" |
29 | #include "lttng-ust-error.h" | |
edb67388 DG |
30 | #include "ust-app.h" |
31 | #include "trace-kernel.h" | |
32 | #include "trace-ust.h" | |
7c1d2758 | 33 | #include "agent.h" |
44760c20 | 34 | #include "utils.h" |
54d01ffb | 35 | |
025faf73 DG |
36 | /* |
37 | * Add unique UST event based on the event name, filter bytecode and loglevel. | |
38 | */ | |
18eace3b DG |
39 | static void add_unique_ust_event(struct lttng_ht *ht, |
40 | struct ltt_ust_event *event) | |
41 | { | |
42 | struct cds_lfht_node *node_ptr; | |
43 | struct ltt_ust_ht_key key; | |
44 | ||
45 | assert(ht); | |
46 | assert(ht->ht); | |
47 | assert(event); | |
48 | ||
49 | key.name = event->attr.name; | |
50 | key.filter = (struct lttng_filter_bytecode *) event->filter; | |
b953b8cd PP |
51 | key.loglevel_type = event->attr.loglevel_type; |
52 | key.loglevel_value = event->attr.loglevel; | |
4031e53e | 53 | key.exclusion = event->exclusion; |
18eace3b DG |
54 | |
55 | node_ptr = cds_lfht_add_unique(ht->ht, | |
56 | ht->hash_fct(event->node.key, lttng_ht_seed), | |
57 | trace_ust_ht_match_event, &key, &event->node.node); | |
58 | assert(node_ptr == &event->node.node); | |
59 | } | |
60 | ||
54d01ffb | 61 | /* |
9550ee81 JR |
62 | * Disable kernel tracepoint events for a channel from the kernel session of |
63 | * a specified event_name and event type. | |
64 | * On type LTTNG_EVENT_ALL all events with event_name are disabled. | |
65 | * If event_name is NULL all events of the specified type are disabled. | |
54d01ffb | 66 | */ |
d0ae4ea8 | 67 | int event_kernel_disable_event(struct ltt_kernel_channel *kchan, |
df4f5a87 | 68 | const char *event_name, enum lttng_event_type type) |
54d01ffb | 69 | { |
9550ee81 | 70 | int ret, error = 0, found = 0; |
54d01ffb DG |
71 | struct ltt_kernel_event *kevent; |
72 | ||
0525e9ae DG |
73 | assert(kchan); |
74 | ||
54d01ffb DG |
75 | /* For each event in the kernel session */ |
76 | cds_list_for_each_entry(kevent, &kchan->events_list.head, list) { | |
d0ae4ea8 MD |
77 | if (type != LTTNG_EVENT_ALL && kevent->type != type) |
78 | continue; | |
9550ee81 JR |
79 | if (event_name != NULL && strcmp(event_name, kevent->event->name)) { |
80 | continue; | |
81 | } | |
82 | found++; | |
54d01ffb DG |
83 | ret = kernel_disable_event(kevent); |
84 | if (ret < 0) { | |
9550ee81 | 85 | error = 1; |
54d01ffb DG |
86 | continue; |
87 | } | |
88 | } | |
9550ee81 JR |
89 | DBG("Disable kernel event: found %d events with name: %s and type: %d", |
90 | found, event_name ? event_name : "NULL", type); | |
7a3d1328 | 91 | |
9550ee81 JR |
92 | if (event_name != NULL && !found) { |
93 | ret = LTTNG_ERR_NO_EVENT; | |
94 | } else { | |
95 | ret = error ? LTTNG_ERR_KERN_DISABLE_FAIL : LTTNG_OK; | |
96 | } | |
97 | ||
98 | return ret; | |
54d01ffb DG |
99 | } |
100 | ||
101 | /* | |
7a3d1328 | 102 | * Enable kernel tracepoint event for a channel from the kernel session. |
49d21f93 | 103 | * We own filter_expression and filter. |
54d01ffb | 104 | */ |
d0ae4ea8 | 105 | int event_kernel_enable_event(struct ltt_kernel_channel *kchan, |
00a62084 MD |
106 | struct lttng_event *event, char *filter_expression, |
107 | struct lttng_filter_bytecode *filter) | |
54d01ffb DG |
108 | { |
109 | int ret; | |
110 | struct ltt_kernel_event *kevent; | |
111 | ||
0525e9ae DG |
112 | assert(kchan); |
113 | assert(event); | |
114 | ||
00a62084 MD |
115 | kevent = trace_kernel_find_event(event->name, kchan, |
116 | event->type, filter); | |
54d01ffb | 117 | if (kevent == NULL) { |
71a3bb01 | 118 | ret = kernel_create_event(event, kchan, filter_expression, filter); |
a969e101 MD |
119 | /* We have passed ownership */ |
120 | filter_expression = NULL; | |
121 | filter = NULL; | |
71a3bb01 | 122 | if (ret) { |
7a3d1328 | 123 | goto end; |
54d01ffb DG |
124 | } |
125 | } else if (kevent->enabled == 0) { | |
126 | ret = kernel_enable_event(kevent); | |
127 | if (ret < 0) { | |
f73fabfd | 128 | ret = LTTNG_ERR_KERN_ENABLE_FAIL; |
7a3d1328 | 129 | goto end; |
54d01ffb | 130 | } |
42224349 DG |
131 | } else { |
132 | /* At this point, the event is considered enabled */ | |
f73fabfd | 133 | ret = LTTNG_ERR_KERN_EVENT_EXIST; |
42224349 | 134 | goto end; |
54d01ffb | 135 | } |
42224349 | 136 | |
f73fabfd | 137 | ret = LTTNG_OK; |
7a3d1328 | 138 | end: |
a969e101 MD |
139 | free(filter_expression); |
140 | free(filter); | |
54d01ffb DG |
141 | return ret; |
142 | } | |
143 | ||
7f79d3a1 DG |
144 | /* |
145 | * ============================ | |
146 | * UST : The Ultimate Frontier! | |
147 | * ============================ | |
148 | */ | |
149 | ||
2bdd86d4 MD |
150 | /* |
151 | * Enable UST tracepoint event for a channel from a UST session. | |
49d21f93 | 152 | * We own filter_expression, filter, and exclusion. |
2bdd86d4 | 153 | */ |
7972aab2 | 154 | int event_ust_enable_tracepoint(struct ltt_ust_session *usess, |
025faf73 | 155 | struct ltt_ust_channel *uchan, struct lttng_event *event, |
6b453b5e | 156 | char *filter_expression, |
f1613f52 | 157 | struct lttng_filter_bytecode *filter, |
88f06f15 JG |
158 | struct lttng_event_exclusion *exclusion, |
159 | bool internal_event) | |
2bdd86d4 | 160 | { |
88e3c2f5 | 161 | int ret = LTTNG_OK, to_create = 0; |
edb67388 DG |
162 | struct ltt_ust_event *uevent; |
163 | ||
0525e9ae DG |
164 | assert(usess); |
165 | assert(uchan); | |
166 | assert(event); | |
167 | ||
18eace3b DG |
168 | rcu_read_lock(); |
169 | ||
025faf73 | 170 | uevent = trace_ust_find_event(uchan->events, event->name, filter, |
abda88ad JG |
171 | (enum lttng_ust_loglevel_type) event->loglevel_type, |
172 | event->loglevel, exclusion); | |
87c6e328 | 173 | if (!uevent) { |
39687410 FD |
174 | ret = trace_ust_create_event(event, filter_expression, |
175 | filter, exclusion, internal_event, &uevent); | |
49d21f93 MD |
176 | /* We have passed ownership */ |
177 | filter_expression = NULL; | |
178 | filter = NULL; | |
179 | exclusion = NULL; | |
39687410 | 180 | if (ret != LTTNG_OK) { |
edb67388 DG |
181 | goto error; |
182 | } | |
025faf73 | 183 | |
fc34caaa | 184 | /* Valid to set it after the goto error since uevent is still NULL */ |
edb67388 DG |
185 | to_create = 1; |
186 | } | |
2bdd86d4 | 187 | |
7f79d3a1 DG |
188 | if (uevent->enabled) { |
189 | /* It's already enabled so everything is OK */ | |
0359fdbc | 190 | assert(!to_create); |
5bcdda4f | 191 | ret = LTTNG_ERR_UST_EVENT_ENABLED; |
7f79d3a1 DG |
192 | goto end; |
193 | } | |
194 | ||
fc34caaa | 195 | uevent->enabled = 1; |
88e3c2f5 JG |
196 | if (to_create) { |
197 | /* Add ltt ust event to channel */ | |
198 | add_unique_ust_event(uchan->events, uevent); | |
199 | } | |
200 | ||
201 | if (!usess->active) { | |
202 | goto end; | |
203 | } | |
fc34caaa | 204 | |
7972aab2 DG |
205 | if (to_create) { |
206 | /* Create event on all UST registered apps for session */ | |
207 | ret = ust_app_create_event_glb(usess, uchan, uevent); | |
208 | } else { | |
209 | /* Enable event on all UST registered apps for session */ | |
210 | ret = ust_app_enable_event_glb(usess, uchan, uevent); | |
211 | } | |
48842b30 | 212 | |
7972aab2 DG |
213 | if (ret < 0) { |
214 | if (ret == -LTTNG_UST_ERR_EXIST) { | |
215 | ret = LTTNG_ERR_UST_EVENT_EXIST; | |
216 | goto end; | |
217 | } else { | |
218 | ret = LTTNG_ERR_UST_ENABLE_FAIL; | |
219 | goto error; | |
edb67388 | 220 | } |
2bdd86d4 | 221 | } |
48842b30 | 222 | |
7f79d3a1 DG |
223 | DBG("Event UST %s %s in channel %s", uevent->attr.name, |
224 | to_create ? "created" : "enabled", uchan->name); | |
225 | ||
f73fabfd | 226 | ret = LTTNG_OK; |
fc34caaa | 227 | |
fb89d070 | 228 | end: |
18eace3b | 229 | rcu_read_unlock(); |
49d21f93 MD |
230 | free(filter_expression); |
231 | free(filter); | |
232 | free(exclusion); | |
fc34caaa | 233 | return ret; |
edb67388 DG |
234 | |
235 | error: | |
fc34caaa DG |
236 | /* |
237 | * Only destroy event on creation time (not enabling time) because if the | |
238 | * event is found in the channel (to_create == 0), it means that at some | |
239 | * point the enable_event worked and it's thus valid to keep it alive. | |
240 | * Destroying it also implies that we also destroy it's shadow copy to sync | |
241 | * everyone up. | |
242 | */ | |
243 | if (to_create) { | |
244 | /* In this code path, the uevent was not added to the hash table */ | |
245 | trace_ust_destroy_event(uevent); | |
246 | } | |
18eace3b | 247 | rcu_read_unlock(); |
49d21f93 MD |
248 | free(filter_expression); |
249 | free(filter); | |
250 | free(exclusion); | |
2bdd86d4 MD |
251 | return ret; |
252 | } | |
253 | ||
7f79d3a1 DG |
254 | /* |
255 | * Disable UST tracepoint of a channel from a UST session. | |
256 | */ | |
7972aab2 | 257 | int event_ust_disable_tracepoint(struct ltt_ust_session *usess, |
df4f5a87 | 258 | struct ltt_ust_channel *uchan, const char *event_name) |
2bdd86d4 MD |
259 | { |
260 | int ret; | |
7f79d3a1 | 261 | struct ltt_ust_event *uevent; |
18eace3b DG |
262 | struct lttng_ht_node_str *node; |
263 | struct lttng_ht_iter iter; | |
18eace3b | 264 | struct lttng_ht *ht; |
2bdd86d4 | 265 | |
0525e9ae DG |
266 | assert(usess); |
267 | assert(uchan); | |
268 | assert(event_name); | |
269 | ||
18eace3b DG |
270 | ht = uchan->events; |
271 | ||
18eace3b | 272 | rcu_read_lock(); |
025faf73 DG |
273 | |
274 | /* | |
275 | * We use a custom lookup since we need the iterator for the next_duplicate | |
276 | * call in the do while loop below. | |
277 | */ | |
278 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) event_name, lttng_ht_seed), | |
279 | trace_ust_ht_match_event_by_name, event_name, &iter.iter); | |
18eace3b DG |
280 | node = lttng_ht_iter_get_node_str(&iter); |
281 | if (node == NULL) { | |
282 | DBG2("Trace UST event NOT found by name %s", event_name); | |
f73fabfd | 283 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; |
7f79d3a1 | 284 | goto error; |
2bdd86d4 | 285 | } |
7f79d3a1 | 286 | |
18eace3b DG |
287 | do { |
288 | uevent = caa_container_of(node, struct ltt_ust_event, node); | |
025faf73 DG |
289 | assert(uevent); |
290 | ||
18eace3b DG |
291 | if (uevent->enabled == 0) { |
292 | /* It's already disabled so everything is OK */ | |
a1dcaf0f | 293 | goto next; |
7f79d3a1 | 294 | } |
88e3c2f5 JG |
295 | uevent->enabled = 0; |
296 | DBG2("Event UST %s disabled in channel %s", uevent->attr.name, | |
297 | uchan->name); | |
18eace3b | 298 | |
88e3c2f5 JG |
299 | if (!usess->active) { |
300 | goto next; | |
301 | } | |
7972aab2 DG |
302 | ret = ust_app_disable_event_glb(usess, uchan, uevent); |
303 | if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) { | |
304 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
18eace3b DG |
305 | goto error; |
306 | } | |
a1dcaf0f | 307 | next: |
18eace3b DG |
308 | /* Get next duplicate event by name. */ |
309 | cds_lfht_next_duplicate(ht->ht, trace_ust_ht_match_event_by_name, | |
310 | event_name, &iter.iter); | |
311 | node = lttng_ht_iter_get_node_str(&iter); | |
312 | } while (node); | |
7f79d3a1 | 313 | |
f73fabfd | 314 | ret = LTTNG_OK; |
7f79d3a1 | 315 | |
7f79d3a1 | 316 | error: |
18eace3b | 317 | rcu_read_unlock(); |
7f79d3a1 DG |
318 | return ret; |
319 | } | |
320 | ||
b1e7fe2d JR |
321 | /* |
322 | * Disable all UST tracepoints for a channel from a UST session. | |
323 | */ | |
324 | int event_ust_disable_all_tracepoints(struct ltt_ust_session *usess, | |
325 | struct ltt_ust_channel *uchan) | |
326 | { | |
3e81c0f2 | 327 | int ret, i, size, error = 0; |
b1e7fe2d JR |
328 | struct lttng_ht_iter iter; |
329 | struct ltt_ust_event *uevent = NULL; | |
330 | struct lttng_event *events = NULL; | |
331 | ||
332 | assert(usess); | |
333 | assert(uchan); | |
334 | ||
335 | rcu_read_lock(); | |
336 | ||
337 | /* Disabling existing events */ | |
338 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, | |
339 | node.node) { | |
340 | if (uevent->enabled == 1) { | |
341 | ret = event_ust_disable_tracepoint(usess, uchan, | |
342 | uevent->attr.name); | |
343 | if (ret < 0) { | |
3e81c0f2 | 344 | error = LTTNG_ERR_UST_DISABLE_FAIL; |
b1e7fe2d JR |
345 | continue; |
346 | } | |
347 | } | |
348 | } | |
349 | ||
350 | /* Get all UST available events */ | |
351 | size = ust_app_list_events(&events); | |
352 | if (size < 0) { | |
353 | ret = LTTNG_ERR_UST_LIST_FAIL; | |
354 | goto error; | |
355 | } | |
356 | ||
357 | for (i = 0; i < size; i++) { | |
358 | ret = event_ust_disable_tracepoint(usess, uchan, | |
359 | events[i].name); | |
3e81c0f2 | 360 | if (ret < 0) { |
b1e7fe2d | 361 | /* Continue to disable the rest... */ |
3e81c0f2 | 362 | error = LTTNG_ERR_UST_DISABLE_FAIL; |
b1e7fe2d JR |
363 | continue; |
364 | } | |
365 | } | |
366 | ||
3e81c0f2 | 367 | ret = error ? error : LTTNG_OK; |
b1e7fe2d JR |
368 | error: |
369 | rcu_read_unlock(); | |
370 | free(events); | |
371 | return ret; | |
372 | } | |
373 | ||
44760c20 JR |
374 | static void agent_enable_all(struct agent *agt) |
375 | { | |
376 | struct agent_event *aevent; | |
377 | struct lttng_ht_iter iter; | |
378 | ||
379 | /* Flag every event as enabled. */ | |
380 | rcu_read_lock(); | |
381 | cds_lfht_for_each_entry ( | |
382 | agt->events->ht, &iter.iter, aevent, node.node) { | |
383 | aevent->enabled_count++; | |
384 | } | |
385 | rcu_read_unlock(); | |
386 | } | |
387 | ||
f20baf8e | 388 | /* |
022d91ba | 389 | * Enable all agent event for a given UST session. |
f20baf8e DG |
390 | * |
391 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
392 | */ | |
022d91ba | 393 | int event_agent_enable_all(struct ltt_ust_session *usess, |
fefd409b | 394 | struct agent *agt, struct lttng_event *event, |
51755dc8 | 395 | struct lttng_filter_bytecode *filter ,char *filter_expression) |
f20baf8e DG |
396 | { |
397 | int ret; | |
f20baf8e DG |
398 | |
399 | assert(usess); | |
400 | ||
022d91ba | 401 | DBG("Event agent enabling ALL events for session %" PRIu64, usess->id); |
f20baf8e | 402 | |
022d91ba | 403 | /* Enable event on agent application through TCP socket. */ |
8404118c | 404 | ret = event_agent_enable(usess, agt, event, filter, filter_expression); |
f20baf8e DG |
405 | if (ret != LTTNG_OK) { |
406 | goto error; | |
407 | } | |
408 | ||
44760c20 | 409 | agent_enable_all(agt); |
f20baf8e DG |
410 | |
411 | ret = LTTNG_OK; | |
412 | ||
413 | error: | |
414 | return ret; | |
415 | } | |
416 | ||
71a559f8 JG |
417 | /* |
418 | * Check if this event's filter requires the activation of application contexts | |
419 | * and enable them in the agent. | |
b4bc01f7 MD |
420 | * TODO: bytecode iterator does not support non-legacy application |
421 | * contexts yet. Not an issue for now, since they are not generated by | |
422 | * the lttng-ctl library. | |
71a559f8 JG |
423 | */ |
424 | static int add_filter_app_ctx(struct lttng_filter_bytecode *bytecode, | |
425 | const char *filter_expression, struct agent *agt) | |
426 | { | |
427 | int ret = LTTNG_OK; | |
428 | char *provider_name = NULL, *ctx_name = NULL; | |
429 | struct bytecode_symbol_iterator *it = | |
430 | bytecode_symbol_iterator_create(bytecode); | |
431 | ||
432 | if (!it) { | |
433 | ret = LTTNG_ERR_NOMEM; | |
434 | goto end; | |
435 | } | |
436 | ||
437 | do { | |
438 | struct lttng_event_context ctx; | |
439 | const char *symbol_name = | |
440 | bytecode_symbol_iterator_get_name(it); | |
441 | ||
442 | if (parse_application_context(symbol_name, &provider_name, | |
443 | &ctx_name)) { | |
444 | /* Not an application context. */ | |
445 | continue; | |
446 | } | |
447 | ||
448 | ctx.ctx = LTTNG_EVENT_CONTEXT_APP_CONTEXT; | |
449 | ctx.u.app_ctx.provider_name = provider_name; | |
450 | ctx.u.app_ctx.ctx_name = ctx_name; | |
451 | ||
452 | /* Recognized an application context. */ | |
453 | DBG("Enabling event with filter expression \"%s\" requires enabling the %s:%s application context.", | |
454 | filter_expression, provider_name, ctx_name); | |
455 | ||
456 | ret = agent_add_context(&ctx, agt); | |
457 | if (ret != LTTNG_OK) { | |
458 | ERR("Failed to add application context %s:%s.", | |
459 | provider_name, ctx_name); | |
460 | goto end; | |
461 | } | |
462 | ||
463 | ret = agent_enable_context(&ctx, agt->domain); | |
464 | if (ret != LTTNG_OK) { | |
465 | ERR("Failed to enable application context %s:%s.", | |
466 | provider_name, ctx_name); | |
467 | goto end; | |
468 | } | |
469 | ||
470 | free(provider_name); | |
471 | free(ctx_name); | |
472 | provider_name = ctx_name = NULL; | |
473 | } while (bytecode_symbol_iterator_next(it) == 0); | |
474 | end: | |
475 | free(provider_name); | |
476 | free(ctx_name); | |
477 | bytecode_symbol_iterator_destroy(it); | |
478 | return ret; | |
479 | } | |
480 | ||
44760c20 JR |
481 | static int agent_enable(struct agent *agt, |
482 | struct lttng_event *event, | |
8404118c JG |
483 | struct lttng_filter_bytecode *filter, |
484 | char *filter_expression) | |
f20baf8e DG |
485 | { |
486 | int ret, created = 0; | |
fefd409b | 487 | struct agent_event *aevent; |
f20baf8e | 488 | |
f20baf8e | 489 | assert(event); |
fefd409b | 490 | assert(agt); |
f20baf8e | 491 | |
a9319624 | 492 | aevent = agent_find_event(event->name, event->loglevel_type, |
71a559f8 | 493 | event->loglevel, filter_expression, agt); |
fefd409b | 494 | if (!aevent) { |
a9319624 PP |
495 | aevent = agent_create_event(event->name, event->loglevel_type, |
496 | event->loglevel, filter, | |
51755dc8 | 497 | filter_expression); |
fefd409b | 498 | if (!aevent) { |
f20baf8e DG |
499 | ret = LTTNG_ERR_NOMEM; |
500 | goto error; | |
501 | } | |
b0a23296 JG |
502 | filter = NULL; |
503 | filter_expression = NULL; | |
f20baf8e | 504 | created = 1; |
44760c20 | 505 | assert(!AGENT_EVENT_IS_ENABLED(aevent)); |
f20baf8e DG |
506 | } |
507 | ||
bf7886d8 JR |
508 | if (created && aevent->filter) { |
509 | ret = add_filter_app_ctx( | |
510 | aevent->filter, aevent->filter_expression, agt); | |
71a559f8 JG |
511 | if (ret != LTTNG_OK) { |
512 | goto error; | |
513 | } | |
514 | } | |
515 | ||
88e3c2f5 | 516 | /* Already enabled? */ |
44760c20 | 517 | if (AGENT_EVENT_IS_ENABLED(aevent)) { |
88e3c2f5 JG |
518 | ret = LTTNG_OK; |
519 | goto end; | |
520 | } | |
521 | ||
fefd409b | 522 | ret = agent_enable_event(aevent, agt->domain); |
f20baf8e DG |
523 | if (ret != LTTNG_OK) { |
524 | goto error; | |
525 | } | |
526 | ||
527 | /* If the event was created prior to the enable, add it to the domain. */ | |
528 | if (created) { | |
fefd409b | 529 | agent_add_event(aevent, agt); |
f20baf8e DG |
530 | } |
531 | ||
b0a23296 JG |
532 | ret = LTTNG_OK; |
533 | goto end; | |
f20baf8e DG |
534 | |
535 | error: | |
536 | if (created) { | |
fefd409b | 537 | agent_destroy_event(aevent); |
f20baf8e | 538 | } |
b0a23296 JG |
539 | end: |
540 | free(filter); | |
541 | free(filter_expression); | |
f20baf8e DG |
542 | return ret; |
543 | } | |
544 | ||
44760c20 JR |
545 | /* |
546 | * Enable a single agent event for a given UST session. | |
547 | * | |
548 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
549 | */ | |
550 | int event_agent_enable(struct ltt_ust_session *usess, | |
551 | struct agent *agt, | |
552 | struct lttng_event *event, | |
553 | struct lttng_filter_bytecode *filter, | |
554 | char *filter_expression) | |
555 | { | |
556 | assert(usess); | |
557 | assert(event); | |
558 | assert(agt); | |
559 | ||
560 | DBG("Enabling agent event: event pattern = '%s', session id = %" PRIu64 ", loglevel type = %d, loglevel = %d, filter expression = '%s'", | |
561 | event->name, usess->id, event->loglevel_type, | |
562 | event->loglevel, | |
563 | filter_expression ? filter_expression : "(none)"); | |
564 | ||
565 | return agent_enable(agt, event, filter, filter_expression); | |
566 | } | |
567 | ||
568 | /* | |
569 | * Enable a single agent event for a trigger. | |
570 | * | |
571 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
572 | */ | |
573 | int trigger_agent_enable(const struct lttng_trigger *trigger, struct agent *agt) | |
574 | { | |
575 | int ret; | |
576 | enum lttng_condition_status c_status; | |
577 | enum lttng_trigger_status t_status; | |
578 | enum lttng_domain_type d_type; | |
579 | const struct lttng_condition *condition; | |
580 | const struct lttng_event_rule *rule; | |
581 | const char *filter_expression; | |
582 | char *filter_expression_copy = NULL; | |
583 | const struct lttng_filter_bytecode *filter_bytecode; | |
584 | struct lttng_filter_bytecode *filter_bytecode_copy = NULL; | |
585 | struct lttng_event *event = NULL; | |
586 | uid_t trigger_owner_uid = 0; | |
587 | const char *trigger_name; | |
588 | ||
589 | assert(trigger); | |
590 | assert(agt); | |
591 | ||
592 | t_status = lttng_trigger_get_name(trigger, &trigger_name); | |
593 | if (t_status != LTTNG_TRIGGER_STATUS_OK) { | |
594 | trigger_name = "(unnamed)"; | |
595 | } | |
596 | ||
597 | t_status = lttng_trigger_get_owner_uid(trigger, &trigger_owner_uid); | |
598 | assert(t_status == LTTNG_TRIGGER_STATUS_OK); | |
599 | ||
600 | condition = lttng_trigger_get_const_condition(trigger); | |
601 | ||
602 | assert(lttng_condition_get_type(condition) == | |
603 | LTTNG_CONDITION_TYPE_EVENT_RULE_HIT); | |
604 | ||
605 | c_status = lttng_condition_event_rule_get_rule(condition, &rule); | |
606 | assert(c_status == LTTNG_CONDITION_STATUS_OK); | |
607 | ||
608 | assert(lttng_event_rule_get_type(rule) == | |
609 | LTTNG_EVENT_RULE_TYPE_TRACEPOINT); | |
610 | ||
611 | d_type = lttng_event_rule_get_domain_type(rule); | |
612 | assert(d_type == agt->domain); | |
613 | ||
614 | event = lttng_event_rule_generate_lttng_event(rule); | |
615 | if (!event) { | |
616 | ret = LTTNG_ERR_NOMEM; | |
617 | goto end; | |
618 | } | |
619 | ||
620 | /* Get the internal filter expression and bytecode. */ | |
621 | filter_expression = lttng_event_rule_get_filter(rule); | |
622 | if (filter_expression) { | |
623 | filter_expression_copy = strdup(filter_expression); | |
624 | if (!filter_expression_copy) { | |
625 | ret = LTTNG_ERR_NOMEM; | |
626 | goto end; | |
627 | } | |
628 | ||
629 | /* Get the filter bytecode */ | |
630 | filter_bytecode = lttng_event_rule_get_filter_bytecode(rule); | |
631 | if (filter_bytecode) { | |
632 | filter_bytecode_copy = | |
633 | lttng_filter_bytecode_copy(filter_bytecode); | |
634 | if (!filter_bytecode_copy) { | |
635 | ret = LTTNG_ERR_NOMEM; | |
636 | goto end; | |
637 | } | |
638 | } | |
639 | } | |
640 | ||
641 | DBG("Enabling agent event from trigger: trigger name = '%s', trigger owner uid = %d, token = %" PRIu64, | |
642 | trigger_name, trigger_owner_uid, | |
643 | lttng_trigger_get_tracer_token(trigger)); | |
644 | ||
645 | ret = agent_enable(agt, event, filter_bytecode_copy, | |
646 | filter_expression_copy); | |
647 | /* Ownership was passed even in case of error. */ | |
648 | filter_expression_copy = NULL; | |
649 | filter_bytecode_copy = NULL; | |
650 | ||
651 | end: | |
652 | free(filter_expression_copy); | |
653 | free(filter_bytecode_copy); | |
654 | free(event); | |
655 | return ret; | |
656 | } | |
657 | ||
da6c3a50 | 658 | /* |
d1ec8e20 JG |
659 | * Return the default event name associated with the provided UST domain. Return |
660 | * NULL on error. | |
da6c3a50 DG |
661 | */ |
662 | const char *event_get_default_agent_ust_name(enum lttng_domain_type domain) | |
663 | { | |
664 | const char *default_event_name = NULL; | |
665 | ||
0e115563 DG |
666 | switch (domain) { |
667 | case LTTNG_DOMAIN_LOG4J: | |
d1ec8e20 | 668 | default_event_name = DEFAULT_LOG4J_EVENT_NAME; |
0e115563 DG |
669 | break; |
670 | case LTTNG_DOMAIN_JUL: | |
d1ec8e20 | 671 | default_event_name = DEFAULT_JUL_EVENT_NAME; |
0e115563 DG |
672 | break; |
673 | case LTTNG_DOMAIN_PYTHON: | |
e7c82272 | 674 | default_event_name = DEFAULT_PYTHON_EVENT_NAME; |
0e115563 DG |
675 | break; |
676 | default: | |
da6c3a50 DG |
677 | assert(0); |
678 | } | |
679 | ||
680 | return default_event_name; | |
681 | } | |
682 | ||
44760c20 JR |
683 | static int trigger_agent_disable_one(const struct lttng_trigger *trigger, |
684 | struct agent *agt, | |
685 | struct agent_event *aevent) | |
686 | ||
687 | { | |
688 | int ret; | |
689 | ||
690 | assert(agt); | |
691 | assert(trigger); | |
692 | assert(aevent); | |
693 | ||
694 | /* | |
695 | * Actual ust event un-registration happens on the trigger | |
696 | * un-registration at that point. | |
697 | */ | |
698 | ||
699 | DBG("Event agent disabling %s (loglevel type %d, loglevel value %d) for trigger %" PRIu64, | |
700 | aevent->name, aevent->loglevel_type, | |
701 | aevent->loglevel_value, lttng_trigger_get_tracer_token(trigger)); | |
702 | ||
703 | /* Already disabled? */ | |
704 | if (!AGENT_EVENT_IS_ENABLED(aevent)) { | |
705 | goto end; | |
706 | } | |
707 | ||
708 | ret = agent_disable_event(aevent, agt->domain); | |
709 | if (ret != LTTNG_OK) { | |
710 | goto error; | |
711 | } | |
712 | ||
713 | end: | |
714 | return LTTNG_OK; | |
715 | ||
716 | error: | |
717 | return ret; | |
718 | } | |
719 | ||
f20baf8e | 720 | /* |
e261a6cc | 721 | * Disable a given agent event for a given UST session. |
f20baf8e | 722 | * |
e261a6cc | 723 | * Must be called with the RCU read lock held. |
f20baf8e DG |
724 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. |
725 | */ | |
e261a6cc PP |
726 | static int event_agent_disable_one(struct ltt_ust_session *usess, |
727 | struct agent *agt, struct agent_event *aevent) | |
f20baf8e DG |
728 | { |
729 | int ret; | |
be6a6276 DG |
730 | struct ltt_ust_event *uevent = NULL; |
731 | struct ltt_ust_channel *uchan = NULL; | |
71aecbf8 | 732 | const char *ust_event_name, *ust_channel_name; |
f20baf8e | 733 | |
fefd409b | 734 | assert(agt); |
f20baf8e | 735 | assert(usess); |
e261a6cc | 736 | assert(aevent); |
f20baf8e | 737 | |
e261a6cc PP |
738 | DBG("Event agent disabling %s (loglevel type %d, loglevel value %d) for session %" PRIu64, |
739 | aevent->name, aevent->loglevel_type, aevent->loglevel_value, | |
740 | usess->id); | |
f20baf8e DG |
741 | |
742 | /* Already disabled? */ | |
44760c20 | 743 | if (!AGENT_EVENT_IS_ENABLED(aevent)) { |
f20baf8e DG |
744 | goto end; |
745 | } | |
746 | ||
71aecbf8 DG |
747 | if (agt->domain == LTTNG_DOMAIN_JUL) { |
748 | ust_channel_name = DEFAULT_JUL_CHANNEL_NAME; | |
749 | } else if (agt->domain == LTTNG_DOMAIN_LOG4J) { | |
750 | ust_channel_name = DEFAULT_LOG4J_CHANNEL_NAME; | |
0e115563 DG |
751 | } else if (agt->domain == LTTNG_DOMAIN_PYTHON) { |
752 | ust_channel_name = DEFAULT_PYTHON_CHANNEL_NAME; | |
71aecbf8 DG |
753 | } else { |
754 | ret = LTTNG_ERR_INVALID; | |
755 | goto error; | |
756 | } | |
757 | ||
be6a6276 DG |
758 | /* |
759 | * Disable it on the UST side. First get the channel reference then find | |
760 | * the event and finally disable it. | |
761 | */ | |
762 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
71aecbf8 | 763 | (char *) ust_channel_name); |
be6a6276 DG |
764 | if (!uchan) { |
765 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
766 | goto error; | |
767 | } | |
768 | ||
da6c3a50 DG |
769 | ust_event_name = event_get_default_agent_ust_name(agt->domain); |
770 | if (!ust_event_name) { | |
771 | ret = LTTNG_ERR_FATAL; | |
772 | goto error; | |
be6a6276 DG |
773 | } |
774 | ||
775 | /* | |
b953b8cd PP |
776 | * Agent UST event has its loglevel type forced to |
777 | * LTTNG_UST_LOGLEVEL_ALL. The actual loglevel type/value filtering | |
778 | * happens thanks to an UST filter. The following -1 is actually | |
779 | * ignored since the type is LTTNG_UST_LOGLEVEL_ALL. | |
be6a6276 | 780 | */ |
da6c3a50 | 781 | uevent = trace_ust_find_event(uchan->events, (char *) ust_event_name, |
b953b8cd | 782 | aevent->filter, LTTNG_UST_LOGLEVEL_ALL, -1, NULL); |
022d91ba | 783 | /* If the agent event exists, it must be available on the UST side. */ |
be6a6276 DG |
784 | assert(uevent); |
785 | ||
88e3c2f5 JG |
786 | if (usess->active) { |
787 | ret = ust_app_disable_event_glb(usess, uchan, uevent); | |
788 | if (ret < 0 && ret != -LTTNG_UST_ERR_EXIST) { | |
789 | ret = LTTNG_ERR_UST_DISABLE_FAIL; | |
790 | goto error; | |
791 | } | |
be6a6276 DG |
792 | } |
793 | ||
0dcfcf94 DG |
794 | /* |
795 | * Flag event that it's disabled so the shadow copy on the ust app side | |
796 | * will disable it if an application shows up. | |
797 | */ | |
798 | uevent->enabled = 0; | |
799 | ||
fefd409b | 800 | ret = agent_disable_event(aevent, agt->domain); |
f20baf8e DG |
801 | if (ret != LTTNG_OK) { |
802 | goto error; | |
803 | } | |
804 | ||
805 | end: | |
806 | return LTTNG_OK; | |
807 | ||
808 | error: | |
809 | return ret; | |
810 | } | |
e261a6cc | 811 | |
44760c20 JR |
812 | /* |
813 | * Disable agent event matching a given trigger. | |
814 | * | |
815 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
816 | */ | |
817 | int trigger_agent_disable( | |
818 | const struct lttng_trigger *trigger, struct agent *agt) | |
819 | { | |
820 | int ret = LTTNG_OK; | |
821 | struct agent_event *aevent; | |
822 | ||
823 | assert(trigger); | |
824 | assert(agt); | |
825 | ||
826 | DBG("Event agent disabling for trigger %" PRIu64, | |
827 | lttng_trigger_get_tracer_token(trigger)); | |
828 | ||
829 | rcu_read_lock(); | |
830 | aevent = agent_find_event_by_trigger(trigger, agt); | |
831 | ||
832 | if (aevent == NULL) { | |
833 | DBG2("Event agent NOT found by trigger %" PRIu64, | |
834 | lttng_trigger_get_tracer_token(trigger)); | |
835 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
836 | goto end; | |
837 | } | |
838 | ||
839 | ret = trigger_agent_disable_one(trigger, agt, aevent); | |
840 | ||
841 | if (ret != LTTNG_OK) { | |
842 | goto end; | |
843 | } | |
844 | ||
845 | end: | |
846 | rcu_read_unlock(); | |
847 | return ret; | |
848 | } | |
849 | ||
e261a6cc PP |
850 | /* |
851 | * Disable all agent events matching a given name for a given UST session. | |
852 | * | |
853 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
854 | */ | |
855 | int event_agent_disable(struct ltt_ust_session *usess, struct agent *agt, | |
df4f5a87 | 856 | const char *event_name) |
e261a6cc PP |
857 | { |
858 | int ret = LTTNG_OK; | |
859 | struct agent_event *aevent; | |
860 | struct lttng_ht_iter iter; | |
861 | struct lttng_ht_node_str *node; | |
862 | ||
863 | assert(agt); | |
864 | assert(usess); | |
865 | assert(event_name); | |
866 | ||
867 | DBG("Event agent disabling %s (all loglevels) for session %" PRIu64, event_name, usess->id); | |
868 | ||
869 | rcu_read_lock(); | |
870 | agent_find_events_by_name(event_name, agt, &iter); | |
871 | node = lttng_ht_iter_get_node_str(&iter); | |
872 | ||
873 | if (node == NULL) { | |
874 | DBG2("Event agent NOT found by name %s", event_name); | |
875 | ret = LTTNG_ERR_UST_EVENT_NOT_FOUND; | |
876 | goto end; | |
877 | } | |
878 | ||
879 | do { | |
880 | aevent = caa_container_of(node, struct agent_event, node); | |
881 | ret = event_agent_disable_one(usess, agt, aevent); | |
882 | ||
883 | if (ret != LTTNG_OK) { | |
884 | goto end; | |
885 | } | |
886 | ||
887 | /* Get next duplicate agent event by name. */ | |
888 | agent_event_next_duplicate(event_name, agt, &iter); | |
889 | node = lttng_ht_iter_get_node_str(&iter); | |
890 | } while (node); | |
891 | end: | |
892 | rcu_read_unlock(); | |
893 | return ret; | |
894 | } | |
f20baf8e | 895 | /* |
022d91ba | 896 | * Disable all agent event for a given UST session. |
f20baf8e DG |
897 | * |
898 | * Return LTTNG_OK on success or else a LTTNG_ERR* code. | |
899 | */ | |
fefd409b DG |
900 | int event_agent_disable_all(struct ltt_ust_session *usess, |
901 | struct agent *agt) | |
f20baf8e | 902 | { |
0dcfcf94 | 903 | int ret; |
fefd409b | 904 | struct agent_event *aevent; |
f20baf8e DG |
905 | struct lttng_ht_iter iter; |
906 | ||
fefd409b | 907 | assert(agt); |
f20baf8e DG |
908 | assert(usess); |
909 | ||
0dcfcf94 DG |
910 | /* |
911 | * Disable event on agent application. Continue to disable all other events | |
912 | * if the * event is not found. | |
913 | */ | |
fefd409b | 914 | ret = event_agent_disable(usess, agt, "*"); |
0dcfcf94 DG |
915 | if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_NOT_FOUND) { |
916 | goto error; | |
f20baf8e DG |
917 | } |
918 | ||
b9866e08 | 919 | /* Disable every event. */ |
f20baf8e | 920 | rcu_read_lock(); |
fefd409b | 921 | cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent, |
f20baf8e | 922 | node.node) { |
44760c20 | 923 | if (!AGENT_EVENT_IS_ENABLED(aevent)) { |
0dcfcf94 DG |
924 | continue; |
925 | } | |
926 | ||
927 | ret = event_agent_disable(usess, agt, aevent->name); | |
928 | if (ret != LTTNG_OK) { | |
b9866e08 | 929 | goto error_unlock; |
f20baf8e | 930 | } |
f20baf8e | 931 | } |
f20baf8e DG |
932 | ret = LTTNG_OK; |
933 | ||
b9866e08 JG |
934 | error_unlock: |
935 | rcu_read_unlock(); | |
f20baf8e DG |
936 | error: |
937 | return ret; | |
938 | } |