Commit | Line | Data |
---|---|---|
a58c490f | 1 | /* |
ab5be9fa | 2 | * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
a58c490f | 3 | * |
ab5be9fa | 4 | * SPDX-License-Identifier: LGPL-2.1-only |
a58c490f | 5 | * |
a58c490f JG |
6 | */ |
7 | ||
3da864a9 | 8 | #include <common/credentials.h> |
a02903c0 | 9 | #include <common/dynamic-array.h> |
9c374932 | 10 | #include <common/error.h> |
6a751b95 | 11 | #include <common/mi-lttng.h> |
3da864a9 | 12 | #include <common/optional.h> |
9c374932 JR |
13 | #include <common/payload-view.h> |
14 | #include <common/payload.h> | |
242388e4 | 15 | #include <inttypes.h> |
9c374932 JR |
16 | #include <lttng/action/action-internal.h> |
17 | #include <lttng/condition/buffer-usage.h> | |
18 | #include <lttng/condition/condition-internal.h> | |
670a26e4 JR |
19 | #include <lttng/condition/event-rule-matches-internal.h> |
20 | #include <lttng/condition/event-rule-matches.h> | |
9c374932 | 21 | #include <lttng/domain.h> |
6a751b95 | 22 | #include <lttng/error-query-internal.h> |
9c374932 JR |
23 | #include <lttng/event-expr-internal.h> |
24 | #include <lttng/event-rule/event-rule-internal.h> | |
25 | #include <lttng/trigger/trigger-internal.h> | |
26 | #include <pthread.h> | |
a58c490f | 27 | |
b61776fb | 28 | bool lttng_trigger_validate(const struct lttng_trigger *trigger) |
a58c490f JG |
29 | { |
30 | bool valid; | |
31 | ||
32 | if (!trigger) { | |
33 | valid = false; | |
34 | goto end; | |
35 | } | |
36 | ||
64eafdf6 JR |
37 | if (!trigger->creds.uid.is_set) { |
38 | valid = false; | |
39 | goto end; | |
40 | } | |
41 | ||
a58c490f JG |
42 | valid = lttng_condition_validate(trigger->condition) && |
43 | lttng_action_validate(trigger->action); | |
44 | end: | |
45 | return valid; | |
46 | } | |
47 | ||
48 | struct lttng_trigger *lttng_trigger_create( | |
49 | struct lttng_condition *condition, | |
50 | struct lttng_action *action) | |
51 | { | |
52 | struct lttng_trigger *trigger = NULL; | |
53 | ||
54 | if (!condition || !action) { | |
55 | goto end; | |
56 | } | |
57 | ||
58 | trigger = zmalloc(sizeof(struct lttng_trigger)); | |
59 | if (!trigger) { | |
60 | goto end; | |
61 | } | |
62 | ||
f01d28b4 JR |
63 | urcu_ref_init(&trigger->ref); |
64 | ||
7ca172c1 | 65 | lttng_condition_get(condition); |
a58c490f | 66 | trigger->condition = condition; |
7ca172c1 JR |
67 | |
68 | lttng_action_get(action); | |
a58c490f | 69 | trigger->action = action; |
3da864a9 | 70 | |
9c374932 JR |
71 | pthread_mutex_init(&trigger->lock, NULL); |
72 | trigger->registered = false; | |
73 | ||
a58c490f JG |
74 | end: |
75 | return trigger; | |
76 | } | |
77 | ||
7ca172c1 JR |
78 | /* |
79 | * Note: the lack of reference counting 'get' on the condition object is normal. | |
80 | * This API was exposed as such in 2.11. The client is not expected to call | |
81 | * lttng_condition_destroy on the returned object. | |
82 | */ | |
a58c490f JG |
83 | struct lttng_condition *lttng_trigger_get_condition( |
84 | struct lttng_trigger *trigger) | |
85 | { | |
86 | return trigger ? trigger->condition : NULL; | |
87 | } | |
88 | ||
9b63a4aa JG |
89 | const struct lttng_condition *lttng_trigger_get_const_condition( |
90 | const struct lttng_trigger *trigger) | |
91 | { | |
0de2479d | 92 | return trigger ? trigger->condition : NULL; |
9b63a4aa JG |
93 | } |
94 | ||
7ca172c1 JR |
95 | /* |
96 | * Note: the lack of reference counting 'get' on the action object is normal. | |
97 | * This API was exposed as such in 2.11. The client is not expected to call | |
98 | * lttng_action_destroy on the returned object. | |
99 | */ | |
e2ba1c78 | 100 | struct lttng_action *lttng_trigger_get_action( |
a58c490f JG |
101 | struct lttng_trigger *trigger) |
102 | { | |
103 | return trigger ? trigger->action : NULL; | |
104 | } | |
105 | ||
9b63a4aa JG |
106 | const struct lttng_action *lttng_trigger_get_const_action( |
107 | const struct lttng_trigger *trigger) | |
108 | { | |
0de2479d | 109 | return trigger ? trigger->action : NULL; |
9b63a4aa JG |
110 | } |
111 | ||
f01d28b4 | 112 | static void trigger_destroy_ref(struct urcu_ref *ref) |
a58c490f | 113 | { |
f01d28b4 JR |
114 | struct lttng_trigger *trigger = |
115 | container_of(ref, struct lttng_trigger, ref); | |
7ca172c1 JR |
116 | struct lttng_action *action = lttng_trigger_get_action(trigger); |
117 | struct lttng_condition *condition = | |
118 | lttng_trigger_get_condition(trigger); | |
119 | ||
a0377dfe FD |
120 | LTTNG_ASSERT(action); |
121 | LTTNG_ASSERT(condition); | |
7ca172c1 JR |
122 | |
123 | /* Release ownership. */ | |
124 | lttng_action_put(action); | |
125 | lttng_condition_put(condition); | |
126 | ||
9c374932 JR |
127 | pthread_mutex_destroy(&trigger->lock); |
128 | ||
242388e4 | 129 | free(trigger->name); |
a58c490f JG |
130 | free(trigger); |
131 | } | |
132 | ||
f01d28b4 JR |
133 | void lttng_trigger_destroy(struct lttng_trigger *trigger) |
134 | { | |
135 | lttng_trigger_put(trigger); | |
136 | } | |
137 | ||
c0a66c84 JG |
138 | ssize_t lttng_trigger_create_from_payload( |
139 | struct lttng_payload_view *src_view, | |
6808ef55 | 140 | struct lttng_trigger **_trigger) |
a58c490f | 141 | { |
242388e4 | 142 | ssize_t ret, offset = 0, condition_size, action_size, name_size = 0; |
a58c490f JG |
143 | struct lttng_condition *condition = NULL; |
144 | struct lttng_action *action = NULL; | |
145 | const struct lttng_trigger_comm *trigger_comm; | |
242388e4 | 146 | const char *name = NULL; |
64eafdf6 JR |
147 | struct lttng_credentials creds = { |
148 | .uid = LTTNG_OPTIONAL_INIT_UNSET, | |
149 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
150 | }; | |
6808ef55 | 151 | struct lttng_trigger *trigger = NULL; |
3e6e0df2 JG |
152 | const struct lttng_payload_view trigger_comm_view = |
153 | lttng_payload_view_from_view( | |
154 | src_view, 0, sizeof(*trigger_comm)); | |
a58c490f | 155 | |
6808ef55 | 156 | if (!src_view || !_trigger) { |
a58c490f JG |
157 | ret = -1; |
158 | goto end; | |
159 | } | |
160 | ||
3e6e0df2 JG |
161 | if (!lttng_payload_view_is_valid(&trigger_comm_view)) { |
162 | /* Payload not large enough to contain the header. */ | |
163 | ret = -1; | |
164 | goto end; | |
165 | } | |
166 | ||
a58c490f | 167 | /* lttng_trigger_comm header */ |
3e6e0df2 | 168 | trigger_comm = (typeof(trigger_comm)) trigger_comm_view.buffer.data; |
64eafdf6 JR |
169 | |
170 | /* Set the trigger's creds. */ | |
171 | if (trigger_comm->uid > (uint64_t) ((uid_t) -1)) { | |
172 | /* UID out of range for this platform. */ | |
173 | ret = -1; | |
174 | goto end; | |
175 | } | |
176 | ||
177 | LTTNG_OPTIONAL_SET(&creds.uid, trigger_comm->uid); | |
178 | ||
a58c490f | 179 | offset += sizeof(*trigger_comm); |
242388e4 JR |
180 | |
181 | if (trigger_comm->name_length != 0) { | |
182 | /* Name. */ | |
183 | const struct lttng_payload_view name_view = | |
184 | lttng_payload_view_from_view( | |
3e6e0df2 JG |
185 | src_view, offset, |
186 | trigger_comm->name_length); | |
187 | ||
188 | if (!lttng_payload_view_is_valid(&name_view)) { | |
189 | ret = -1; | |
190 | goto end; | |
191 | } | |
242388e4 JR |
192 | |
193 | name = name_view.buffer.data; | |
194 | if (!lttng_buffer_view_contains_string(&name_view.buffer, name, | |
195 | trigger_comm->name_length)) { | |
196 | ret = -1; | |
197 | goto end; | |
198 | } | |
199 | ||
200 | offset += trigger_comm->name_length; | |
201 | name_size = trigger_comm->name_length; | |
202 | } | |
203 | ||
c0a66c84 JG |
204 | { |
205 | /* struct lttng_condition */ | |
206 | struct lttng_payload_view condition_view = | |
207 | lttng_payload_view_from_view( | |
208 | src_view, offset, -1); | |
209 | ||
210 | condition_size = lttng_condition_create_from_payload(&condition_view, | |
211 | &condition); | |
212 | } | |
a58c490f | 213 | |
a58c490f JG |
214 | if (condition_size < 0) { |
215 | ret = condition_size; | |
216 | goto end; | |
217 | } | |
c0a66c84 | 218 | |
a58c490f | 219 | offset += condition_size; |
c0a66c84 JG |
220 | { |
221 | /* struct lttng_action */ | |
222 | struct lttng_payload_view action_view = | |
223 | lttng_payload_view_from_view( | |
224 | src_view, offset, -1); | |
225 | ||
226 | action_size = lttng_action_create_from_payload(&action_view, &action); | |
227 | } | |
a58c490f | 228 | |
a58c490f JG |
229 | if (action_size < 0) { |
230 | ret = action_size; | |
231 | goto end; | |
232 | } | |
233 | offset += action_size; | |
234 | ||
235 | /* Unexpected size of inner-elements; the buffer is corrupted. */ | |
242388e4 | 236 | if ((ssize_t) trigger_comm->length != condition_size + action_size + name_size) { |
a58c490f JG |
237 | ret = -1; |
238 | goto error; | |
239 | } | |
240 | ||
6808ef55 JG |
241 | trigger = lttng_trigger_create(condition, action); |
242 | if (!trigger) { | |
a58c490f JG |
243 | ret = -1; |
244 | goto error; | |
245 | } | |
c0a66c84 | 246 | |
6808ef55 | 247 | lttng_trigger_set_credentials(trigger, &creds); |
64eafdf6 | 248 | |
7ca172c1 JR |
249 | /* |
250 | * The trigger object owns references to the action and condition | |
251 | * objects. | |
252 | */ | |
253 | lttng_condition_put(condition); | |
254 | condition = NULL; | |
255 | ||
256 | lttng_action_put(action); | |
257 | action = NULL; | |
258 | ||
242388e4 JR |
259 | if (name) { |
260 | const enum lttng_trigger_status status = | |
6808ef55 | 261 | lttng_trigger_set_name(trigger, name); |
242388e4 JR |
262 | |
263 | if (status != LTTNG_TRIGGER_STATUS_OK) { | |
264 | ret = -1; | |
265 | goto end; | |
266 | } | |
267 | } | |
268 | ||
a58c490f | 269 | ret = offset; |
7ca172c1 | 270 | |
a58c490f | 271 | error: |
1065801b JG |
272 | lttng_condition_put(condition); |
273 | lttng_action_put(action); | |
7ca172c1 | 274 | end: |
f5d98ed9 | 275 | if (ret >= 0) { |
6808ef55 JG |
276 | *_trigger = trigger; |
277 | } else { | |
278 | lttng_trigger_put(trigger); | |
279 | } | |
280 | ||
a58c490f JG |
281 | return ret; |
282 | } | |
283 | ||
284 | /* | |
a58c490f JG |
285 | * Both elements are stored contiguously, see their "*_comm" structure |
286 | * for the detailed format. | |
287 | */ | |
a02903c0 | 288 | int lttng_trigger_serialize(const struct lttng_trigger *trigger, |
c0a66c84 | 289 | struct lttng_payload *payload) |
a58c490f | 290 | { |
3647288f | 291 | int ret; |
242388e4 | 292 | size_t header_offset, size_before_payload, size_name; |
c0a66c84 | 293 | struct lttng_trigger_comm trigger_comm = {}; |
3647288f | 294 | struct lttng_trigger_comm *header; |
64eafdf6 JR |
295 | const struct lttng_credentials *creds = NULL; |
296 | ||
297 | creds = lttng_trigger_get_credentials(trigger); | |
a0377dfe | 298 | LTTNG_ASSERT(creds); |
64eafdf6 JR |
299 | |
300 | trigger_comm.uid = LTTNG_OPTIONAL_GET(creds->uid); | |
a58c490f | 301 | |
242388e4 JR |
302 | if (trigger->name != NULL) { |
303 | size_name = strlen(trigger->name) + 1; | |
304 | } else { | |
305 | size_name = 0; | |
306 | } | |
307 | ||
308 | trigger_comm.name_length = size_name; | |
309 | ||
c0a66c84 JG |
310 | header_offset = payload->buffer.size; |
311 | ret = lttng_dynamic_buffer_append(&payload->buffer, &trigger_comm, | |
3647288f JG |
312 | sizeof(trigger_comm)); |
313 | if (ret) { | |
a58c490f JG |
314 | goto end; |
315 | } | |
316 | ||
c0a66c84 | 317 | size_before_payload = payload->buffer.size; |
242388e4 JR |
318 | |
319 | /* Trigger name. */ | |
320 | ret = lttng_dynamic_buffer_append( | |
321 | &payload->buffer, trigger->name, size_name); | |
322 | if (ret) { | |
323 | goto end; | |
324 | } | |
325 | ||
c0a66c84 | 326 | ret = lttng_condition_serialize(trigger->condition, payload); |
3647288f | 327 | if (ret) { |
a58c490f JG |
328 | goto end; |
329 | } | |
a58c490f | 330 | |
c0a66c84 | 331 | ret = lttng_action_serialize(trigger->action, payload); |
3647288f | 332 | if (ret) { |
a58c490f JG |
333 | goto end; |
334 | } | |
a58c490f | 335 | |
3647288f | 336 | /* Update payload size. */ |
c0a66c84 JG |
337 | header = (typeof(header)) (payload->buffer.data + header_offset); |
338 | header->length = payload->buffer.size - size_before_payload; | |
a58c490f JG |
339 | end: |
340 | return ret; | |
341 | } | |
3da864a9 | 342 | |
85c06c44 JR |
343 | bool lttng_trigger_is_equal( |
344 | const struct lttng_trigger *a, const struct lttng_trigger *b) | |
345 | { | |
0efb2ad7 JG |
346 | if (!!a->name != !!b->name) { |
347 | /* Both must be either anonymous or named. */ | |
348 | return false; | |
349 | } | |
350 | ||
351 | if (a->name && strcmp(a->name, b->name) != 0) { | |
1ca78886 FD |
352 | return false; |
353 | } | |
354 | ||
85c06c44 JR |
355 | if (!lttng_condition_is_equal(a->condition, b->condition)) { |
356 | return false; | |
357 | } | |
358 | ||
359 | if (!lttng_action_is_equal(a->action, b->action)) { | |
360 | return false; | |
361 | } | |
362 | ||
363 | if (!lttng_credentials_is_equal(lttng_trigger_get_credentials(a), | |
364 | lttng_trigger_get_credentials(b))) { | |
365 | return false; | |
366 | } | |
367 | ||
f2bda80e JG |
368 | if (a->is_hidden != b->is_hidden) { |
369 | return false; | |
370 | } | |
371 | ||
85c06c44 JR |
372 | return true; |
373 | } | |
374 | ||
f2bda80e JG |
375 | bool lttng_trigger_is_hidden(const struct lttng_trigger *trigger) |
376 | { | |
377 | return trigger->is_hidden; | |
378 | } | |
379 | ||
f2bda80e JG |
380 | void lttng_trigger_set_hidden(struct lttng_trigger *trigger) |
381 | { | |
a0377dfe | 382 | LTTNG_ASSERT(!trigger->is_hidden); |
f2bda80e JG |
383 | trigger->is_hidden = true; |
384 | } | |
385 | ||
242388e4 JR |
386 | enum lttng_trigger_status lttng_trigger_set_name(struct lttng_trigger *trigger, |
387 | const char* name) | |
388 | { | |
389 | char *name_copy = NULL; | |
390 | enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK; | |
391 | ||
a5c2d2a7 | 392 | if (!trigger) { |
242388e4 JR |
393 | status = LTTNG_TRIGGER_STATUS_INVALID; |
394 | goto end; | |
395 | } | |
396 | ||
a5c2d2a7 JG |
397 | if (name) { |
398 | name_copy = strdup(name); | |
399 | if (!name_copy) { | |
400 | status = LTTNG_TRIGGER_STATUS_ERROR; | |
401 | goto end; | |
402 | } | |
242388e4 JR |
403 | } |
404 | ||
405 | free(trigger->name); | |
406 | ||
407 | trigger->name = name_copy; | |
408 | name_copy = NULL; | |
409 | end: | |
410 | return status; | |
411 | } | |
412 | ||
413 | enum lttng_trigger_status lttng_trigger_get_name( | |
414 | const struct lttng_trigger *trigger, const char **name) | |
415 | { | |
416 | enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK; | |
417 | ||
418 | if (!trigger || !name) { | |
419 | status = LTTNG_TRIGGER_STATUS_INVALID; | |
420 | goto end; | |
421 | } | |
422 | ||
423 | if (!trigger->name) { | |
424 | status = LTTNG_TRIGGER_STATUS_UNSET; | |
425 | } | |
426 | ||
427 | *name = trigger->name; | |
428 | end: | |
429 | return status; | |
430 | } | |
431 | ||
242388e4 JR |
432 | int lttng_trigger_assign_name(struct lttng_trigger *dst, |
433 | const struct lttng_trigger *src) | |
434 | { | |
435 | int ret = 0; | |
436 | enum lttng_trigger_status status; | |
437 | ||
438 | status = lttng_trigger_set_name(dst, src->name); | |
439 | if (status != LTTNG_TRIGGER_STATUS_OK) { | |
440 | ret = -1; | |
441 | ERR("Failed to set name for trigger"); | |
442 | goto end; | |
443 | } | |
444 | end: | |
445 | return ret; | |
446 | } | |
447 | ||
e6887944 JR |
448 | void lttng_trigger_set_tracer_token(struct lttng_trigger *trigger, |
449 | uint64_t token) | |
450 | { | |
a0377dfe | 451 | LTTNG_ASSERT(trigger); |
e6887944 JR |
452 | LTTNG_OPTIONAL_SET(&trigger->tracer_token, token); |
453 | } | |
454 | ||
e6887944 JR |
455 | uint64_t lttng_trigger_get_tracer_token(const struct lttng_trigger *trigger) |
456 | { | |
a0377dfe | 457 | LTTNG_ASSERT(trigger); |
e6887944 JR |
458 | |
459 | return LTTNG_OPTIONAL_GET(trigger->tracer_token); | |
460 | } | |
461 | ||
242388e4 JR |
462 | int lttng_trigger_generate_name(struct lttng_trigger *trigger, |
463 | uint64_t unique_id) | |
464 | { | |
465 | int ret = 0; | |
466 | char *generated_name = NULL; | |
467 | ||
80ea4bfa | 468 | ret = asprintf(&generated_name, "trigger%" PRIu64 "", unique_id); |
242388e4 JR |
469 | if (ret < 0) { |
470 | ERR("Failed to generate trigger name"); | |
471 | ret = -1; | |
472 | goto end; | |
473 | } | |
474 | ||
475 | ret = 0; | |
476 | free(trigger->name); | |
477 | trigger->name = generated_name; | |
478 | end: | |
479 | return ret; | |
480 | } | |
481 | ||
f01d28b4 JR |
482 | void lttng_trigger_get(struct lttng_trigger *trigger) |
483 | { | |
484 | urcu_ref_get(&trigger->ref); | |
485 | } | |
486 | ||
f01d28b4 JR |
487 | void lttng_trigger_put(struct lttng_trigger *trigger) |
488 | { | |
489 | if (!trigger) { | |
490 | return; | |
491 | } | |
492 | ||
493 | urcu_ref_put(&trigger->ref , trigger_destroy_ref); | |
494 | } | |
495 | ||
a02903c0 JR |
496 | static void delete_trigger_array_element(void *ptr) |
497 | { | |
498 | struct lttng_trigger *trigger = ptr; | |
499 | ||
500 | lttng_trigger_put(trigger); | |
501 | } | |
502 | ||
a02903c0 JR |
503 | struct lttng_triggers *lttng_triggers_create(void) |
504 | { | |
505 | struct lttng_triggers *triggers = NULL; | |
506 | ||
507 | triggers = zmalloc(sizeof(*triggers)); | |
508 | if (!triggers) { | |
509 | goto end; | |
510 | } | |
511 | ||
512 | lttng_dynamic_pointer_array_init(&triggers->array, delete_trigger_array_element); | |
513 | ||
514 | end: | |
515 | return triggers; | |
516 | } | |
517 | ||
a02903c0 JR |
518 | struct lttng_trigger *lttng_triggers_borrow_mutable_at_index( |
519 | const struct lttng_triggers *triggers, unsigned int index) | |
520 | { | |
521 | struct lttng_trigger *trigger = NULL; | |
522 | ||
a0377dfe | 523 | LTTNG_ASSERT(triggers); |
a02903c0 JR |
524 | if (index >= lttng_dynamic_pointer_array_get_count(&triggers->array)) { |
525 | goto end; | |
526 | } | |
527 | ||
528 | trigger = (struct lttng_trigger *) | |
529 | lttng_dynamic_pointer_array_get_pointer( | |
530 | &triggers->array, index); | |
531 | end: | |
532 | return trigger; | |
533 | } | |
534 | ||
a02903c0 JR |
535 | int lttng_triggers_add( |
536 | struct lttng_triggers *triggers, struct lttng_trigger *trigger) | |
537 | { | |
538 | int ret; | |
539 | ||
a0377dfe FD |
540 | LTTNG_ASSERT(triggers); |
541 | LTTNG_ASSERT(trigger); | |
a02903c0 JR |
542 | |
543 | lttng_trigger_get(trigger); | |
544 | ||
545 | ret = lttng_dynamic_pointer_array_add_pointer(&triggers->array, trigger); | |
546 | if (ret) { | |
547 | lttng_trigger_put(trigger); | |
548 | } | |
549 | ||
550 | return ret; | |
551 | } | |
552 | ||
f2bda80e JG |
553 | int lttng_triggers_remove_hidden_triggers(struct lttng_triggers *triggers) |
554 | { | |
555 | int ret; | |
556 | unsigned int trigger_count, i = 0; | |
557 | enum lttng_trigger_status trigger_status; | |
558 | ||
a0377dfe | 559 | LTTNG_ASSERT(triggers); |
f2bda80e JG |
560 | |
561 | trigger_status = lttng_triggers_get_count(triggers, &trigger_count); | |
a0377dfe | 562 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
f2bda80e JG |
563 | |
564 | while (i < trigger_count) { | |
565 | const struct lttng_trigger *trigger = | |
566 | lttng_triggers_get_at_index(triggers, i); | |
567 | ||
568 | if (lttng_trigger_is_hidden(trigger)) { | |
569 | ret = lttng_dynamic_pointer_array_remove_pointer( | |
570 | &triggers->array, i); | |
571 | if (ret) { | |
572 | goto end; | |
573 | } | |
574 | ||
575 | trigger_count--; | |
576 | } else { | |
577 | i++; | |
578 | } | |
579 | } | |
580 | ||
581 | ret = 0; | |
582 | end: | |
583 | return ret; | |
584 | } | |
585 | ||
a02903c0 JR |
586 | const struct lttng_trigger *lttng_triggers_get_at_index( |
587 | const struct lttng_triggers *triggers, unsigned int index) | |
588 | { | |
589 | return lttng_triggers_borrow_mutable_at_index(triggers, index); | |
590 | } | |
591 | ||
592 | enum lttng_trigger_status lttng_triggers_get_count(const struct lttng_triggers *triggers, unsigned int *count) | |
593 | { | |
594 | enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK; | |
595 | ||
596 | if (!triggers || !count) { | |
597 | status = LTTNG_TRIGGER_STATUS_INVALID; | |
598 | goto end; | |
599 | } | |
600 | ||
601 | *count = lttng_dynamic_pointer_array_get_count(&triggers->array); | |
602 | end: | |
603 | return status; | |
604 | } | |
605 | ||
606 | void lttng_triggers_destroy(struct lttng_triggers *triggers) | |
607 | { | |
608 | if (!triggers) { | |
609 | return; | |
610 | } | |
611 | ||
612 | lttng_dynamic_pointer_array_reset(&triggers->array); | |
613 | free(triggers); | |
614 | } | |
615 | ||
616 | int lttng_triggers_serialize(const struct lttng_triggers *triggers, | |
617 | struct lttng_payload *payload) | |
618 | { | |
619 | int ret; | |
620 | unsigned int i, count; | |
621 | size_t size_before_payload; | |
622 | struct lttng_triggers_comm triggers_comm = {}; | |
623 | struct lttng_triggers_comm *header; | |
624 | enum lttng_trigger_status status; | |
625 | const size_t header_offset = payload->buffer.size; | |
626 | ||
627 | status = lttng_triggers_get_count(triggers, &count); | |
628 | if (status != LTTNG_TRIGGER_STATUS_OK) { | |
629 | ret = LTTNG_ERR_INVALID; | |
630 | goto end; | |
631 | } | |
632 | ||
633 | triggers_comm.count = count; | |
634 | ||
635 | /* Placeholder header; updated at the end. */ | |
636 | ret = lttng_dynamic_buffer_append(&payload->buffer, &triggers_comm, | |
637 | sizeof(triggers_comm)); | |
638 | if (ret) { | |
639 | goto end; | |
640 | } | |
641 | ||
642 | size_before_payload = payload->buffer.size; | |
643 | ||
644 | for (i = 0; i < count; i++) { | |
645 | const struct lttng_trigger *trigger = | |
646 | lttng_triggers_get_at_index(triggers, i); | |
647 | ||
a0377dfe | 648 | LTTNG_ASSERT(trigger); |
a02903c0 JR |
649 | |
650 | ret = lttng_trigger_serialize(trigger, payload); | |
651 | if (ret) { | |
652 | goto end; | |
653 | } | |
654 | } | |
655 | ||
656 | /* Update payload size. */ | |
657 | header = (struct lttng_triggers_comm *) ((char *) payload->buffer.data + header_offset); | |
658 | header->length = payload->buffer.size - size_before_payload; | |
659 | end: | |
660 | return ret; | |
661 | } | |
662 | ||
a02903c0 JR |
663 | ssize_t lttng_triggers_create_from_payload( |
664 | struct lttng_payload_view *src_view, | |
665 | struct lttng_triggers **triggers) | |
666 | { | |
667 | ssize_t ret, offset = 0, triggers_size = 0; | |
668 | unsigned int i; | |
669 | const struct lttng_triggers_comm *triggers_comm; | |
670 | struct lttng_triggers *local_triggers = NULL; | |
671 | ||
672 | if (!src_view || !triggers) { | |
673 | ret = -1; | |
674 | goto error; | |
675 | } | |
676 | ||
677 | /* lttng_trigger_comms header */ | |
678 | triggers_comm = (const struct lttng_triggers_comm *) src_view->buffer.data; | |
679 | offset += sizeof(*triggers_comm); | |
680 | ||
681 | local_triggers = lttng_triggers_create(); | |
682 | if (!local_triggers) { | |
683 | ret = -1; | |
684 | goto error; | |
685 | } | |
686 | ||
687 | for (i = 0; i < triggers_comm->count; i++) { | |
688 | struct lttng_trigger *trigger = NULL; | |
689 | struct lttng_payload_view trigger_view = | |
690 | lttng_payload_view_from_view(src_view, offset, -1); | |
691 | ssize_t trigger_size; | |
692 | ||
693 | trigger_size = lttng_trigger_create_from_payload( | |
694 | &trigger_view, &trigger); | |
695 | if (trigger_size < 0) { | |
696 | ret = trigger_size; | |
697 | goto error; | |
698 | } | |
699 | ||
700 | /* Transfer ownership of the trigger to the collection. */ | |
701 | ret = lttng_triggers_add(local_triggers, trigger); | |
702 | lttng_trigger_put(trigger); | |
703 | if (ret < 0) { | |
704 | ret = -1; | |
705 | goto error; | |
706 | } | |
707 | ||
708 | offset += trigger_size; | |
709 | triggers_size += trigger_size; | |
710 | } | |
711 | ||
712 | /* Unexpected size of inner-elements; the buffer is corrupted. */ | |
713 | if ((ssize_t) triggers_comm->length != triggers_size) { | |
714 | ret = -1; | |
715 | goto error; | |
716 | } | |
717 | ||
718 | /* Pass ownership to caller. */ | |
719 | *triggers = local_triggers; | |
720 | local_triggers = NULL; | |
721 | ||
722 | ret = offset; | |
723 | error: | |
724 | ||
725 | lttng_triggers_destroy(local_triggers); | |
726 | return ret; | |
727 | } | |
728 | ||
3da864a9 JR |
729 | const struct lttng_credentials *lttng_trigger_get_credentials( |
730 | const struct lttng_trigger *trigger) | |
731 | { | |
64eafdf6 | 732 | return &trigger->creds; |
3da864a9 JR |
733 | } |
734 | ||
64eafdf6 | 735 | void lttng_trigger_set_credentials(struct lttng_trigger *trigger, |
3da864a9 JR |
736 | const struct lttng_credentials *creds) |
737 | { | |
a0377dfe | 738 | LTTNG_ASSERT(creds); |
64eafdf6 JR |
739 | trigger->creds = *creds; |
740 | } | |
741 | ||
742 | enum lttng_trigger_status lttng_trigger_set_owner_uid( | |
743 | struct lttng_trigger *trigger, uid_t uid) | |
744 | { | |
745 | enum lttng_trigger_status ret = LTTNG_TRIGGER_STATUS_OK; | |
d84c8ae3 | 746 | const uid_t euid = geteuid(); |
64eafdf6 JR |
747 | const struct lttng_credentials creds = { |
748 | .uid = LTTNG_OPTIONAL_INIT_VALUE(uid), | |
749 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
750 | }; | |
751 | ||
752 | if (!trigger) { | |
753 | ret = LTTNG_TRIGGER_STATUS_INVALID; | |
754 | goto end; | |
755 | } | |
756 | ||
757 | /* Client-side validation only to report a clearer error. */ | |
d84c8ae3 | 758 | if (euid != 0 && euid != uid) { |
64eafdf6 JR |
759 | ret = LTTNG_TRIGGER_STATUS_PERMISSION_DENIED; |
760 | goto end; | |
761 | } | |
762 | ||
763 | lttng_trigger_set_credentials(trigger, &creds); | |
764 | ||
765 | end: | |
766 | return ret; | |
767 | } | |
768 | ||
769 | enum lttng_trigger_status lttng_trigger_get_owner_uid( | |
770 | const struct lttng_trigger *trigger, uid_t *uid) | |
771 | { | |
772 | enum lttng_trigger_status ret = LTTNG_TRIGGER_STATUS_OK; | |
773 | const struct lttng_credentials *creds = NULL; | |
774 | ||
775 | if (!trigger || !uid ) { | |
776 | ret = LTTNG_TRIGGER_STATUS_INVALID; | |
777 | goto end; | |
778 | } | |
779 | ||
780 | if (!trigger->creds.uid.is_set ) { | |
781 | ret = LTTNG_TRIGGER_STATUS_UNSET; | |
782 | goto end; | |
783 | } | |
784 | ||
785 | creds = lttng_trigger_get_credentials(trigger); | |
786 | *uid = lttng_credentials_get_uid(creds); | |
787 | ||
788 | end: | |
789 | return ret; | |
3da864a9 | 790 | } |
5c504c41 | 791 | |
91c96f62 JR |
792 | enum lttng_domain_type lttng_trigger_get_underlying_domain_type_restriction( |
793 | const struct lttng_trigger *trigger) | |
794 | { | |
795 | enum lttng_domain_type type = LTTNG_DOMAIN_NONE; | |
796 | const struct lttng_event_rule *event_rule; | |
797 | enum lttng_condition_status c_status; | |
798 | enum lttng_condition_type c_type; | |
799 | ||
a0377dfe FD |
800 | LTTNG_ASSERT(trigger); |
801 | LTTNG_ASSERT(trigger->condition); | |
91c96f62 JR |
802 | |
803 | c_type = lttng_condition_get_type(trigger->condition); | |
804 | assert (c_type != LTTNG_CONDITION_TYPE_UNKNOWN); | |
805 | ||
806 | switch (c_type) { | |
807 | case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE: | |
808 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING: | |
809 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED: | |
810 | /* Apply to any domain. */ | |
811 | type = LTTNG_DOMAIN_NONE; | |
812 | break; | |
8dbb86b8 | 813 | case LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES: |
91c96f62 | 814 | /* Return the domain of the event rule. */ |
8dbb86b8 | 815 | c_status = lttng_condition_event_rule_matches_get_rule( |
91c96f62 | 816 | trigger->condition, &event_rule); |
a0377dfe | 817 | LTTNG_ASSERT(c_status == LTTNG_CONDITION_STATUS_OK); |
91c96f62 JR |
818 | type = lttng_event_rule_get_domain_type(event_rule); |
819 | break; | |
820 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH: | |
821 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW: | |
822 | /* Return the domain of the channel being monitored. */ | |
823 | c_status = lttng_condition_buffer_usage_get_domain_type( | |
824 | trigger->condition, &type); | |
a0377dfe | 825 | LTTNG_ASSERT(c_status == LTTNG_CONDITION_STATUS_OK); |
91c96f62 JR |
826 | break; |
827 | default: | |
828 | abort(); | |
829 | } | |
830 | ||
831 | return type; | |
832 | } | |
58daac01 JR |
833 | |
834 | /* | |
835 | * Generate bytecode related to the trigger. | |
836 | * On success LTTNG_OK. On error, returns lttng_error code. | |
837 | */ | |
58daac01 JR |
838 | enum lttng_error_code lttng_trigger_generate_bytecode( |
839 | struct lttng_trigger *trigger, | |
840 | const struct lttng_credentials *creds) | |
841 | { | |
842 | enum lttng_error_code ret; | |
843 | struct lttng_condition *condition = NULL; | |
844 | ||
845 | condition = lttng_trigger_get_condition(trigger); | |
846 | if (!condition) { | |
847 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
848 | goto end; | |
849 | } | |
850 | ||
851 | switch (lttng_condition_get_type(condition)) { | |
8dbb86b8 | 852 | case LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES: |
58daac01 JR |
853 | { |
854 | struct lttng_event_rule *event_rule; | |
855 | const enum lttng_condition_status condition_status = | |
8dbb86b8 JR |
856 | lttng_condition_event_rule_matches_borrow_rule_mutable( |
857 | condition, &event_rule); | |
58daac01 | 858 | |
a0377dfe | 859 | LTTNG_ASSERT(condition_status == LTTNG_CONDITION_STATUS_OK); |
f2e97f59 JR |
860 | |
861 | /* Generate the filter bytecode. */ | |
58daac01 JR |
862 | ret = lttng_event_rule_generate_filter_bytecode( |
863 | event_rule, creds); | |
864 | if (ret != LTTNG_OK) { | |
865 | goto end; | |
866 | } | |
867 | ||
f2e97f59 | 868 | /* Generate the capture bytecode. */ |
8dbb86b8 | 869 | ret = lttng_condition_event_rule_matches_generate_capture_descriptor_bytecode( |
f2e97f59 JR |
870 | condition); |
871 | if (ret != LTTNG_OK) { | |
872 | goto end; | |
873 | } | |
874 | ||
58daac01 JR |
875 | ret = LTTNG_OK; |
876 | break; | |
877 | } | |
878 | default: | |
879 | ret = LTTNG_OK; | |
880 | break; | |
881 | } | |
882 | end: | |
883 | return ret; | |
884 | } | |
b61776fb | 885 | |
b61776fb SM |
886 | struct lttng_trigger *lttng_trigger_copy(const struct lttng_trigger *trigger) |
887 | { | |
888 | int ret; | |
889 | struct lttng_payload copy_buffer; | |
94dbd8e4 JG |
890 | struct lttng_condition *condition_copy = NULL; |
891 | struct lttng_action *action_copy = NULL; | |
b61776fb | 892 | struct lttng_trigger *copy = NULL; |
94dbd8e4 JG |
893 | enum lttng_trigger_status trigger_status; |
894 | const char *trigger_name; | |
895 | uid_t trigger_owner_uid; | |
b61776fb SM |
896 | |
897 | lttng_payload_init(©_buffer); | |
898 | ||
94dbd8e4 | 899 | ret = lttng_condition_serialize(trigger->condition, ©_buffer); |
b61776fb SM |
900 | if (ret < 0) { |
901 | goto end; | |
902 | } | |
903 | ||
904 | { | |
905 | struct lttng_payload_view view = | |
906 | lttng_payload_view_from_payload( | |
907 | ©_buffer, 0, -1); | |
94dbd8e4 JG |
908 | |
909 | ret = lttng_condition_create_from_payload( | |
910 | &view, &condition_copy); | |
911 | if (ret < 0) { | |
912 | goto end; | |
913 | } | |
914 | } | |
915 | ||
916 | lttng_payload_clear(©_buffer); | |
917 | ||
918 | ret = lttng_action_serialize(trigger->action, ©_buffer); | |
919 | if (ret < 0) { | |
920 | goto end; | |
921 | } | |
922 | ||
923 | { | |
924 | struct lttng_payload_view view = | |
925 | lttng_payload_view_from_payload( | |
926 | ©_buffer, 0, -1); | |
927 | ||
928 | ret = lttng_action_create_from_payload( | |
929 | &view, &action_copy); | |
b61776fb | 930 | if (ret < 0) { |
b61776fb SM |
931 | goto end; |
932 | } | |
933 | } | |
934 | ||
94dbd8e4 JG |
935 | copy = lttng_trigger_create(condition_copy, action_copy); |
936 | if (!copy) { | |
937 | ERR("Failed to allocate trigger during trigger copy"); | |
938 | goto end; | |
939 | } | |
940 | ||
941 | trigger_status = lttng_trigger_get_name(trigger, &trigger_name); | |
942 | switch (trigger_status) { | |
943 | case LTTNG_TRIGGER_STATUS_OK: | |
944 | trigger_status = lttng_trigger_set_name(copy, trigger_name); | |
945 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
946 | ERR("Failed to set name of new trigger during copy"); | |
947 | goto error_cleanup_trigger; | |
948 | } | |
949 | break; | |
950 | case LTTNG_TRIGGER_STATUS_UNSET: | |
951 | break; | |
952 | default: | |
953 | ERR("Failed to get name of original trigger during copy"); | |
954 | goto error_cleanup_trigger; | |
955 | } | |
956 | ||
957 | trigger_status = lttng_trigger_get_owner_uid( | |
958 | trigger, &trigger_owner_uid); | |
959 | switch (trigger_status) { | |
960 | case LTTNG_TRIGGER_STATUS_OK: | |
961 | LTTNG_OPTIONAL_SET(©->creds.uid, trigger_owner_uid); | |
962 | break; | |
963 | case LTTNG_TRIGGER_STATUS_UNSET: | |
964 | break; | |
965 | default: | |
966 | ERR("Failed to get owner uid of original trigger during copy"); | |
967 | goto error_cleanup_trigger; | |
968 | } | |
969 | ||
970 | copy->tracer_token = trigger->tracer_token; | |
971 | copy->registered = trigger->registered; | |
f2bda80e | 972 | copy->is_hidden = trigger->is_hidden; |
94dbd8e4 JG |
973 | goto end; |
974 | ||
975 | error_cleanup_trigger: | |
976 | lttng_trigger_destroy(copy); | |
977 | copy = NULL; | |
b61776fb | 978 | end: |
94dbd8e4 JG |
979 | lttng_condition_put(condition_copy); |
980 | lttng_action_put(action_copy); | |
b61776fb SM |
981 | lttng_payload_reset(©_buffer); |
982 | return copy; | |
983 | } | |
c738df17 | 984 | |
c738df17 FD |
985 | bool lttng_trigger_needs_tracer_notifier(const struct lttng_trigger *trigger) |
986 | { | |
987 | bool needs_tracer_notifier = false; | |
988 | const struct lttng_condition *condition = | |
989 | lttng_trigger_get_const_condition(trigger); | |
990 | ||
991 | switch (lttng_condition_get_type(condition)) { | |
8dbb86b8 | 992 | case LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES: |
c738df17 FD |
993 | needs_tracer_notifier = true; |
994 | goto end; | |
995 | case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE: | |
996 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH: | |
997 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW: | |
998 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING: | |
999 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED: | |
1000 | goto end; | |
1001 | case LTTNG_CONDITION_TYPE_UNKNOWN: | |
1002 | default: | |
1003 | abort(); | |
1004 | } | |
1005 | end: | |
1006 | return needs_tracer_notifier; | |
1007 | } | |
9c374932 | 1008 | |
9c374932 JR |
1009 | void lttng_trigger_set_as_registered(struct lttng_trigger *trigger) |
1010 | { | |
1011 | pthread_mutex_lock(&trigger->lock); | |
1012 | trigger->registered = true; | |
1013 | pthread_mutex_unlock(&trigger->lock); | |
1014 | } | |
1015 | ||
9c374932 JR |
1016 | void lttng_trigger_set_as_unregistered(struct lttng_trigger *trigger) |
1017 | { | |
1018 | pthread_mutex_lock(&trigger->lock); | |
1019 | trigger->registered = false; | |
1020 | pthread_mutex_unlock(&trigger->lock); | |
1021 | } | |
1022 | ||
1023 | /* | |
1024 | * The trigger must be locked before calling lttng_trigger_registered. | |
1025 | * The lock is necessary since a trigger can be unregistered at anytime. | |
1026 | * Manipulations requiring that the trigger be registered must always acquire | |
1027 | * the trigger lock for the duration of the manipulation using | |
1028 | * `lttng_trigger_lock` and `lttng_trigger_unlock`. | |
1029 | */ | |
9c374932 JR |
1030 | bool lttng_trigger_is_registered(struct lttng_trigger *trigger) |
1031 | { | |
1032 | ASSERT_LOCKED(trigger->lock); | |
1033 | return trigger->registered; | |
1034 | } | |
1035 | ||
9c374932 JR |
1036 | void lttng_trigger_lock(struct lttng_trigger *trigger) |
1037 | { | |
1038 | pthread_mutex_lock(&trigger->lock); | |
1039 | } | |
1040 | ||
9c374932 JR |
1041 | void lttng_trigger_unlock(struct lttng_trigger *trigger) |
1042 | { | |
1043 | pthread_mutex_unlock(&trigger->lock); | |
1044 | } | |
6a751b95 | 1045 | |
6a751b95 JR |
1046 | enum lttng_error_code lttng_trigger_mi_serialize(const struct lttng_trigger *trigger, |
1047 | struct mi_writer *writer, | |
1048 | const struct mi_lttng_error_query_callbacks | |
1049 | *error_query_callbacks) | |
1050 | { | |
1051 | int ret; | |
1052 | enum lttng_error_code ret_code; | |
1053 | enum lttng_trigger_status trigger_status; | |
1054 | const struct lttng_condition *condition = NULL; | |
1055 | const struct lttng_action *action = NULL; | |
1056 | struct lttng_dynamic_array action_path_indexes; | |
1057 | uid_t owner_uid; | |
1058 | ||
a0377dfe FD |
1059 | LTTNG_ASSERT(trigger); |
1060 | LTTNG_ASSERT(writer); | |
6a751b95 JR |
1061 | |
1062 | lttng_dynamic_array_init(&action_path_indexes, sizeof(uint64_t), NULL); | |
1063 | ||
1064 | /* Open trigger element. */ | |
1065 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_trigger); | |
1066 | if (ret) { | |
1067 | goto mi_error; | |
1068 | } | |
1069 | ||
1070 | trigger_status = lttng_trigger_get_owner_uid(trigger, &owner_uid); | |
a0377dfe | 1071 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
6a751b95 JR |
1072 | |
1073 | /* Name. */ | |
1074 | ret = mi_lttng_writer_write_element_string( | |
1075 | writer, config_element_name, trigger->name); | |
1076 | if (ret) { | |
1077 | goto mi_error; | |
1078 | } | |
1079 | ||
1080 | /* Owner uid. */ | |
1081 | ret = mi_lttng_writer_write_element_signed_int(writer, | |
1082 | mi_lttng_element_trigger_owner_uid, | |
1083 | (int64_t) owner_uid); | |
1084 | if (ret) { | |
1085 | goto mi_error; | |
1086 | } | |
1087 | ||
1088 | /* Condition. */ | |
1089 | condition = lttng_trigger_get_const_condition(trigger); | |
a0377dfe | 1090 | LTTNG_ASSERT(condition); |
6a751b95 JR |
1091 | ret_code = lttng_condition_mi_serialize( |
1092 | trigger, condition, writer, error_query_callbacks); | |
1093 | if (ret_code != LTTNG_OK) { | |
1094 | goto end; | |
1095 | } | |
1096 | ||
1097 | /* Action. */ | |
1098 | action = lttng_trigger_get_const_action(trigger); | |
a0377dfe | 1099 | LTTNG_ASSERT(action); |
6a751b95 JR |
1100 | ret_code = lttng_action_mi_serialize(trigger, action, writer, |
1101 | error_query_callbacks, &action_path_indexes); | |
1102 | if (ret_code != LTTNG_OK) { | |
1103 | goto end; | |
1104 | } | |
1105 | ||
1106 | if (error_query_callbacks && error_query_callbacks->trigger_cb) { | |
1107 | struct lttng_error_query_results *results = NULL; | |
1108 | ||
1109 | ret_code = error_query_callbacks->trigger_cb(trigger, &results); | |
1110 | if (ret_code != LTTNG_OK) { | |
1111 | goto end; | |
1112 | } | |
1113 | ||
1114 | ret_code = lttng_error_query_results_mi_serialize( | |
1115 | results, writer); | |
1116 | lttng_error_query_results_destroy(results); | |
1117 | if (ret_code != LTTNG_OK) { | |
1118 | goto end; | |
1119 | } | |
1120 | } | |
1121 | ||
1122 | /* Close trigger element. */ | |
1123 | ret = mi_lttng_writer_close_element(writer); | |
1124 | if (ret) { | |
1125 | goto mi_error; | |
1126 | } | |
1127 | ||
1128 | ret_code = LTTNG_OK; | |
1129 | goto end; | |
1130 | ||
1131 | mi_error: | |
1132 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
1133 | end: | |
1134 | lttng_dynamic_array_reset(&action_path_indexes); | |
1135 | return ret_code; | |
1136 | } | |
1137 | ||
1138 | /* Used by qsort, which expects the semantics of strcmp(). */ | |
1139 | static int compare_triggers_by_name(const void *a, const void *b) | |
1140 | { | |
1141 | const struct lttng_trigger *trigger_a = | |
1142 | *((const struct lttng_trigger **) a); | |
1143 | const struct lttng_trigger *trigger_b = | |
1144 | *((const struct lttng_trigger **) b); | |
1145 | const char *name_a, *name_b; | |
1146 | enum lttng_trigger_status trigger_status; | |
1147 | ||
1148 | /* Anonymous triggers are not reachable here. */ | |
1149 | trigger_status = lttng_trigger_get_name(trigger_a, &name_a); | |
a0377dfe | 1150 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
6a751b95 JR |
1151 | |
1152 | trigger_status = lttng_trigger_get_name(trigger_b, &name_b); | |
a0377dfe | 1153 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
6a751b95 JR |
1154 | |
1155 | return strcmp(name_a, name_b); | |
1156 | } | |
1157 | ||
6a751b95 JR |
1158 | enum lttng_error_code lttng_triggers_mi_serialize(const struct lttng_triggers *triggers, |
1159 | struct mi_writer *writer, | |
1160 | const struct mi_lttng_error_query_callbacks | |
1161 | *error_query_callbacks) | |
1162 | { | |
1163 | int ret; | |
1164 | enum lttng_error_code ret_code; | |
1165 | enum lttng_trigger_status status; | |
1166 | unsigned int count, i; | |
1167 | struct lttng_dynamic_pointer_array sorted_triggers; | |
1168 | ||
a0377dfe FD |
1169 | LTTNG_ASSERT(triggers); |
1170 | LTTNG_ASSERT(writer); | |
6a751b95 JR |
1171 | |
1172 | /* | |
1173 | * Sort trigger by name to ensure an order at the MI level and ignore | |
1174 | * any anonymous trigger present. | |
1175 | */ | |
1176 | lttng_dynamic_pointer_array_init(&sorted_triggers, NULL); | |
1177 | ||
1178 | status = lttng_triggers_get_count(triggers, &count); | |
a0377dfe | 1179 | LTTNG_ASSERT(status == LTTNG_TRIGGER_STATUS_OK); |
6a751b95 JR |
1180 | |
1181 | for (i = 0; i < count; i++) { | |
1182 | int add_ret; | |
1183 | const char *unused_name; | |
1184 | const struct lttng_trigger *trigger = | |
1185 | lttng_triggers_get_at_index(triggers, i); | |
1186 | ||
1187 | status = lttng_trigger_get_name(trigger, &unused_name); | |
1188 | switch (status) { | |
1189 | case LTTNG_TRIGGER_STATUS_OK: | |
1190 | break; | |
1191 | case LTTNG_TRIGGER_STATUS_UNSET: | |
1192 | /* Don't list anonymous triggers. */ | |
1193 | continue; | |
1194 | default: | |
1195 | abort(); | |
1196 | } | |
1197 | ||
1198 | add_ret = lttng_dynamic_pointer_array_add_pointer( | |
1199 | &sorted_triggers, (void *) trigger); | |
1200 | ||
1201 | if (add_ret) { | |
1202 | ERR("Failed to lttng_trigger to sorting array."); | |
1203 | ret_code = LTTNG_ERR_NOMEM; | |
1204 | goto error; | |
1205 | } | |
1206 | } | |
1207 | ||
1208 | qsort(sorted_triggers.array.buffer.data, count, | |
1209 | sizeof(struct lttng_trigger *), | |
1210 | compare_triggers_by_name); | |
1211 | ||
1212 | /* Open triggers element. */ | |
1213 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_triggers); | |
1214 | if (ret) { | |
1215 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
1216 | goto error; | |
1217 | } | |
1218 | ||
1219 | for (i = 0; i < lttng_dynamic_pointer_array_get_count(&sorted_triggers); i++) { | |
1220 | const struct lttng_trigger *trigger = | |
1221 | (const struct lttng_trigger *) | |
1222 | lttng_dynamic_pointer_array_get_pointer( | |
1223 | &sorted_triggers, i); | |
1224 | ||
1225 | lttng_trigger_mi_serialize(trigger, writer, error_query_callbacks); | |
1226 | } | |
1227 | ||
1228 | /* Close triggers element. */ | |
1229 | ret = mi_lttng_writer_close_element(writer); | |
1230 | if (ret) { | |
1231 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
1232 | goto error; | |
1233 | } | |
1234 | ||
1235 | ret_code = LTTNG_OK; | |
1236 | ||
1237 | error: | |
1238 | lttng_dynamic_pointer_array_reset(&sorted_triggers); | |
1239 | return ret_code; | |
1240 | } |