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 JG |
27 | |
28 | LTTNG_HIDDEN | |
b61776fb | 29 | bool lttng_trigger_validate(const struct lttng_trigger *trigger) |
a58c490f JG |
30 | { |
31 | bool valid; | |
32 | ||
33 | if (!trigger) { | |
34 | valid = false; | |
35 | goto end; | |
36 | } | |
37 | ||
64eafdf6 JR |
38 | if (!trigger->creds.uid.is_set) { |
39 | valid = false; | |
40 | goto end; | |
41 | } | |
42 | ||
a58c490f JG |
43 | valid = lttng_condition_validate(trigger->condition) && |
44 | lttng_action_validate(trigger->action); | |
45 | end: | |
46 | return valid; | |
47 | } | |
48 | ||
49 | struct lttng_trigger *lttng_trigger_create( | |
50 | struct lttng_condition *condition, | |
51 | struct lttng_action *action) | |
52 | { | |
53 | struct lttng_trigger *trigger = NULL; | |
54 | ||
55 | if (!condition || !action) { | |
56 | goto end; | |
57 | } | |
58 | ||
59 | trigger = zmalloc(sizeof(struct lttng_trigger)); | |
60 | if (!trigger) { | |
61 | goto end; | |
62 | } | |
63 | ||
f01d28b4 JR |
64 | urcu_ref_init(&trigger->ref); |
65 | ||
7ca172c1 | 66 | lttng_condition_get(condition); |
a58c490f | 67 | trigger->condition = condition; |
7ca172c1 JR |
68 | |
69 | lttng_action_get(action); | |
a58c490f | 70 | trigger->action = action; |
3da864a9 | 71 | |
9c374932 JR |
72 | pthread_mutex_init(&trigger->lock, NULL); |
73 | trigger->registered = false; | |
74 | ||
a58c490f JG |
75 | end: |
76 | return trigger; | |
77 | } | |
78 | ||
7ca172c1 JR |
79 | /* |
80 | * Note: the lack of reference counting 'get' on the condition object is normal. | |
81 | * This API was exposed as such in 2.11. The client is not expected to call | |
82 | * lttng_condition_destroy on the returned object. | |
83 | */ | |
a58c490f JG |
84 | struct lttng_condition *lttng_trigger_get_condition( |
85 | struct lttng_trigger *trigger) | |
86 | { | |
87 | return trigger ? trigger->condition : NULL; | |
88 | } | |
89 | ||
9b63a4aa JG |
90 | const struct lttng_condition *lttng_trigger_get_const_condition( |
91 | const struct lttng_trigger *trigger) | |
92 | { | |
0de2479d | 93 | return trigger ? trigger->condition : NULL; |
9b63a4aa JG |
94 | } |
95 | ||
7ca172c1 JR |
96 | /* |
97 | * Note: the lack of reference counting 'get' on the action object is normal. | |
98 | * This API was exposed as such in 2.11. The client is not expected to call | |
99 | * lttng_action_destroy on the returned object. | |
100 | */ | |
e2ba1c78 | 101 | struct lttng_action *lttng_trigger_get_action( |
a58c490f JG |
102 | struct lttng_trigger *trigger) |
103 | { | |
104 | return trigger ? trigger->action : NULL; | |
105 | } | |
106 | ||
9b63a4aa JG |
107 | const struct lttng_action *lttng_trigger_get_const_action( |
108 | const struct lttng_trigger *trigger) | |
109 | { | |
0de2479d | 110 | return trigger ? trigger->action : NULL; |
9b63a4aa JG |
111 | } |
112 | ||
f01d28b4 | 113 | static void trigger_destroy_ref(struct urcu_ref *ref) |
a58c490f | 114 | { |
f01d28b4 JR |
115 | struct lttng_trigger *trigger = |
116 | container_of(ref, struct lttng_trigger, ref); | |
7ca172c1 JR |
117 | struct lttng_action *action = lttng_trigger_get_action(trigger); |
118 | struct lttng_condition *condition = | |
119 | lttng_trigger_get_condition(trigger); | |
120 | ||
a0377dfe FD |
121 | LTTNG_ASSERT(action); |
122 | LTTNG_ASSERT(condition); | |
7ca172c1 JR |
123 | |
124 | /* Release ownership. */ | |
125 | lttng_action_put(action); | |
126 | lttng_condition_put(condition); | |
127 | ||
9c374932 JR |
128 | pthread_mutex_destroy(&trigger->lock); |
129 | ||
242388e4 | 130 | free(trigger->name); |
a58c490f JG |
131 | free(trigger); |
132 | } | |
133 | ||
f01d28b4 JR |
134 | void lttng_trigger_destroy(struct lttng_trigger *trigger) |
135 | { | |
136 | lttng_trigger_put(trigger); | |
137 | } | |
138 | ||
a58c490f | 139 | LTTNG_HIDDEN |
c0a66c84 JG |
140 | ssize_t lttng_trigger_create_from_payload( |
141 | struct lttng_payload_view *src_view, | |
6808ef55 | 142 | struct lttng_trigger **_trigger) |
a58c490f | 143 | { |
242388e4 | 144 | ssize_t ret, offset = 0, condition_size, action_size, name_size = 0; |
a58c490f JG |
145 | struct lttng_condition *condition = NULL; |
146 | struct lttng_action *action = NULL; | |
147 | const struct lttng_trigger_comm *trigger_comm; | |
242388e4 | 148 | const char *name = NULL; |
64eafdf6 JR |
149 | struct lttng_credentials creds = { |
150 | .uid = LTTNG_OPTIONAL_INIT_UNSET, | |
151 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
152 | }; | |
6808ef55 | 153 | struct lttng_trigger *trigger = NULL; |
3e6e0df2 JG |
154 | const struct lttng_payload_view trigger_comm_view = |
155 | lttng_payload_view_from_view( | |
156 | src_view, 0, sizeof(*trigger_comm)); | |
a58c490f | 157 | |
6808ef55 | 158 | if (!src_view || !_trigger) { |
a58c490f JG |
159 | ret = -1; |
160 | goto end; | |
161 | } | |
162 | ||
3e6e0df2 JG |
163 | if (!lttng_payload_view_is_valid(&trigger_comm_view)) { |
164 | /* Payload not large enough to contain the header. */ | |
165 | ret = -1; | |
166 | goto end; | |
167 | } | |
168 | ||
a58c490f | 169 | /* lttng_trigger_comm header */ |
3e6e0df2 | 170 | trigger_comm = (typeof(trigger_comm)) trigger_comm_view.buffer.data; |
64eafdf6 JR |
171 | |
172 | /* Set the trigger's creds. */ | |
173 | if (trigger_comm->uid > (uint64_t) ((uid_t) -1)) { | |
174 | /* UID out of range for this platform. */ | |
175 | ret = -1; | |
176 | goto end; | |
177 | } | |
178 | ||
179 | LTTNG_OPTIONAL_SET(&creds.uid, trigger_comm->uid); | |
180 | ||
a58c490f | 181 | offset += sizeof(*trigger_comm); |
242388e4 JR |
182 | |
183 | if (trigger_comm->name_length != 0) { | |
184 | /* Name. */ | |
185 | const struct lttng_payload_view name_view = | |
186 | lttng_payload_view_from_view( | |
3e6e0df2 JG |
187 | src_view, offset, |
188 | trigger_comm->name_length); | |
189 | ||
190 | if (!lttng_payload_view_is_valid(&name_view)) { | |
191 | ret = -1; | |
192 | goto end; | |
193 | } | |
242388e4 JR |
194 | |
195 | name = name_view.buffer.data; | |
196 | if (!lttng_buffer_view_contains_string(&name_view.buffer, name, | |
197 | trigger_comm->name_length)) { | |
198 | ret = -1; | |
199 | goto end; | |
200 | } | |
201 | ||
202 | offset += trigger_comm->name_length; | |
203 | name_size = trigger_comm->name_length; | |
204 | } | |
205 | ||
c0a66c84 JG |
206 | { |
207 | /* struct lttng_condition */ | |
208 | struct lttng_payload_view condition_view = | |
209 | lttng_payload_view_from_view( | |
210 | src_view, offset, -1); | |
211 | ||
212 | condition_size = lttng_condition_create_from_payload(&condition_view, | |
213 | &condition); | |
214 | } | |
a58c490f | 215 | |
a58c490f JG |
216 | if (condition_size < 0) { |
217 | ret = condition_size; | |
218 | goto end; | |
219 | } | |
c0a66c84 | 220 | |
a58c490f | 221 | offset += condition_size; |
c0a66c84 JG |
222 | { |
223 | /* struct lttng_action */ | |
224 | struct lttng_payload_view action_view = | |
225 | lttng_payload_view_from_view( | |
226 | src_view, offset, -1); | |
227 | ||
228 | action_size = lttng_action_create_from_payload(&action_view, &action); | |
229 | } | |
a58c490f | 230 | |
a58c490f JG |
231 | if (action_size < 0) { |
232 | ret = action_size; | |
233 | goto end; | |
234 | } | |
235 | offset += action_size; | |
236 | ||
237 | /* Unexpected size of inner-elements; the buffer is corrupted. */ | |
242388e4 | 238 | if ((ssize_t) trigger_comm->length != condition_size + action_size + name_size) { |
a58c490f JG |
239 | ret = -1; |
240 | goto error; | |
241 | } | |
242 | ||
6808ef55 JG |
243 | trigger = lttng_trigger_create(condition, action); |
244 | if (!trigger) { | |
a58c490f JG |
245 | ret = -1; |
246 | goto error; | |
247 | } | |
c0a66c84 | 248 | |
6808ef55 | 249 | lttng_trigger_set_credentials(trigger, &creds); |
64eafdf6 | 250 | |
7ca172c1 JR |
251 | /* |
252 | * The trigger object owns references to the action and condition | |
253 | * objects. | |
254 | */ | |
255 | lttng_condition_put(condition); | |
256 | condition = NULL; | |
257 | ||
258 | lttng_action_put(action); | |
259 | action = NULL; | |
260 | ||
242388e4 JR |
261 | if (name) { |
262 | const enum lttng_trigger_status status = | |
6808ef55 | 263 | lttng_trigger_set_name(trigger, name); |
242388e4 JR |
264 | |
265 | if (status != LTTNG_TRIGGER_STATUS_OK) { | |
266 | ret = -1; | |
267 | goto end; | |
268 | } | |
269 | } | |
270 | ||
a58c490f | 271 | ret = offset; |
7ca172c1 | 272 | |
a58c490f | 273 | error: |
1065801b JG |
274 | lttng_condition_put(condition); |
275 | lttng_action_put(action); | |
7ca172c1 | 276 | end: |
f5d98ed9 | 277 | if (ret >= 0) { |
6808ef55 JG |
278 | *_trigger = trigger; |
279 | } else { | |
280 | lttng_trigger_put(trigger); | |
281 | } | |
282 | ||
a58c490f JG |
283 | return ret; |
284 | } | |
285 | ||
286 | /* | |
a58c490f JG |
287 | * Both elements are stored contiguously, see their "*_comm" structure |
288 | * for the detailed format. | |
289 | */ | |
290 | LTTNG_HIDDEN | |
a02903c0 | 291 | int lttng_trigger_serialize(const struct lttng_trigger *trigger, |
c0a66c84 | 292 | struct lttng_payload *payload) |
a58c490f | 293 | { |
3647288f | 294 | int ret; |
242388e4 | 295 | size_t header_offset, size_before_payload, size_name; |
c0a66c84 | 296 | struct lttng_trigger_comm trigger_comm = {}; |
3647288f | 297 | struct lttng_trigger_comm *header; |
64eafdf6 JR |
298 | const struct lttng_credentials *creds = NULL; |
299 | ||
300 | creds = lttng_trigger_get_credentials(trigger); | |
a0377dfe | 301 | LTTNG_ASSERT(creds); |
64eafdf6 JR |
302 | |
303 | trigger_comm.uid = LTTNG_OPTIONAL_GET(creds->uid); | |
a58c490f | 304 | |
242388e4 JR |
305 | if (trigger->name != NULL) { |
306 | size_name = strlen(trigger->name) + 1; | |
307 | } else { | |
308 | size_name = 0; | |
309 | } | |
310 | ||
311 | trigger_comm.name_length = size_name; | |
312 | ||
c0a66c84 JG |
313 | header_offset = payload->buffer.size; |
314 | ret = lttng_dynamic_buffer_append(&payload->buffer, &trigger_comm, | |
3647288f JG |
315 | sizeof(trigger_comm)); |
316 | if (ret) { | |
a58c490f JG |
317 | goto end; |
318 | } | |
319 | ||
c0a66c84 | 320 | size_before_payload = payload->buffer.size; |
242388e4 JR |
321 | |
322 | /* Trigger name. */ | |
323 | ret = lttng_dynamic_buffer_append( | |
324 | &payload->buffer, trigger->name, size_name); | |
325 | if (ret) { | |
326 | goto end; | |
327 | } | |
328 | ||
c0a66c84 | 329 | ret = lttng_condition_serialize(trigger->condition, payload); |
3647288f | 330 | if (ret) { |
a58c490f JG |
331 | goto end; |
332 | } | |
a58c490f | 333 | |
c0a66c84 | 334 | ret = lttng_action_serialize(trigger->action, payload); |
3647288f | 335 | if (ret) { |
a58c490f JG |
336 | goto end; |
337 | } | |
a58c490f | 338 | |
3647288f | 339 | /* Update payload size. */ |
c0a66c84 JG |
340 | header = (typeof(header)) (payload->buffer.data + header_offset); |
341 | header->length = payload->buffer.size - size_before_payload; | |
a58c490f JG |
342 | end: |
343 | return ret; | |
344 | } | |
3da864a9 | 345 | |
85c06c44 JR |
346 | LTTNG_HIDDEN |
347 | bool lttng_trigger_is_equal( | |
348 | const struct lttng_trigger *a, const struct lttng_trigger *b) | |
349 | { | |
0efb2ad7 JG |
350 | if (!!a->name != !!b->name) { |
351 | /* Both must be either anonymous or named. */ | |
352 | return false; | |
353 | } | |
354 | ||
355 | if (a->name && strcmp(a->name, b->name) != 0) { | |
1ca78886 FD |
356 | return false; |
357 | } | |
358 | ||
85c06c44 JR |
359 | if (!lttng_condition_is_equal(a->condition, b->condition)) { |
360 | return false; | |
361 | } | |
362 | ||
363 | if (!lttng_action_is_equal(a->action, b->action)) { | |
364 | return false; | |
365 | } | |
366 | ||
367 | if (!lttng_credentials_is_equal(lttng_trigger_get_credentials(a), | |
368 | lttng_trigger_get_credentials(b))) { | |
369 | return false; | |
370 | } | |
371 | ||
f2bda80e JG |
372 | if (a->is_hidden != b->is_hidden) { |
373 | return false; | |
374 | } | |
375 | ||
85c06c44 JR |
376 | return true; |
377 | } | |
378 | ||
f2bda80e JG |
379 | LTTNG_HIDDEN |
380 | bool lttng_trigger_is_hidden(const struct lttng_trigger *trigger) | |
381 | { | |
382 | return trigger->is_hidden; | |
383 | } | |
384 | ||
385 | LTTNG_HIDDEN | |
386 | void lttng_trigger_set_hidden(struct lttng_trigger *trigger) | |
387 | { | |
a0377dfe | 388 | LTTNG_ASSERT(!trigger->is_hidden); |
f2bda80e JG |
389 | trigger->is_hidden = true; |
390 | } | |
391 | ||
a5c2d2a7 | 392 | LTTNG_HIDDEN |
242388e4 JR |
393 | enum lttng_trigger_status lttng_trigger_set_name(struct lttng_trigger *trigger, |
394 | const char* name) | |
395 | { | |
396 | char *name_copy = NULL; | |
397 | enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK; | |
398 | ||
a5c2d2a7 | 399 | if (!trigger) { |
242388e4 JR |
400 | status = LTTNG_TRIGGER_STATUS_INVALID; |
401 | goto end; | |
402 | } | |
403 | ||
a5c2d2a7 JG |
404 | if (name) { |
405 | name_copy = strdup(name); | |
406 | if (!name_copy) { | |
407 | status = LTTNG_TRIGGER_STATUS_ERROR; | |
408 | goto end; | |
409 | } | |
242388e4 JR |
410 | } |
411 | ||
412 | free(trigger->name); | |
413 | ||
414 | trigger->name = name_copy; | |
415 | name_copy = NULL; | |
416 | end: | |
417 | return status; | |
418 | } | |
419 | ||
420 | enum lttng_trigger_status lttng_trigger_get_name( | |
421 | const struct lttng_trigger *trigger, const char **name) | |
422 | { | |
423 | enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK; | |
424 | ||
425 | if (!trigger || !name) { | |
426 | status = LTTNG_TRIGGER_STATUS_INVALID; | |
427 | goto end; | |
428 | } | |
429 | ||
430 | if (!trigger->name) { | |
431 | status = LTTNG_TRIGGER_STATUS_UNSET; | |
432 | } | |
433 | ||
434 | *name = trigger->name; | |
435 | end: | |
436 | return status; | |
437 | } | |
438 | ||
439 | LTTNG_HIDDEN | |
440 | int lttng_trigger_assign_name(struct lttng_trigger *dst, | |
441 | const struct lttng_trigger *src) | |
442 | { | |
443 | int ret = 0; | |
444 | enum lttng_trigger_status status; | |
445 | ||
446 | status = lttng_trigger_set_name(dst, src->name); | |
447 | if (status != LTTNG_TRIGGER_STATUS_OK) { | |
448 | ret = -1; | |
449 | ERR("Failed to set name for trigger"); | |
450 | goto end; | |
451 | } | |
452 | end: | |
453 | return ret; | |
454 | } | |
455 | ||
e6887944 JR |
456 | LTTNG_HIDDEN |
457 | void lttng_trigger_set_tracer_token(struct lttng_trigger *trigger, | |
458 | uint64_t token) | |
459 | { | |
a0377dfe | 460 | LTTNG_ASSERT(trigger); |
e6887944 JR |
461 | LTTNG_OPTIONAL_SET(&trigger->tracer_token, token); |
462 | } | |
463 | ||
464 | LTTNG_HIDDEN | |
465 | uint64_t lttng_trigger_get_tracer_token(const struct lttng_trigger *trigger) | |
466 | { | |
a0377dfe | 467 | LTTNG_ASSERT(trigger); |
e6887944 JR |
468 | |
469 | return LTTNG_OPTIONAL_GET(trigger->tracer_token); | |
470 | } | |
471 | ||
242388e4 JR |
472 | LTTNG_HIDDEN |
473 | int lttng_trigger_generate_name(struct lttng_trigger *trigger, | |
474 | uint64_t unique_id) | |
475 | { | |
476 | int ret = 0; | |
477 | char *generated_name = NULL; | |
478 | ||
80ea4bfa | 479 | ret = asprintf(&generated_name, "trigger%" PRIu64 "", unique_id); |
242388e4 JR |
480 | if (ret < 0) { |
481 | ERR("Failed to generate trigger name"); | |
482 | ret = -1; | |
483 | goto end; | |
484 | } | |
485 | ||
486 | ret = 0; | |
487 | free(trigger->name); | |
488 | trigger->name = generated_name; | |
489 | end: | |
490 | return ret; | |
491 | } | |
492 | ||
f01d28b4 JR |
493 | LTTNG_HIDDEN |
494 | void lttng_trigger_get(struct lttng_trigger *trigger) | |
495 | { | |
496 | urcu_ref_get(&trigger->ref); | |
497 | } | |
498 | ||
499 | LTTNG_HIDDEN | |
500 | void lttng_trigger_put(struct lttng_trigger *trigger) | |
501 | { | |
502 | if (!trigger) { | |
503 | return; | |
504 | } | |
505 | ||
506 | urcu_ref_put(&trigger->ref , trigger_destroy_ref); | |
507 | } | |
508 | ||
a02903c0 JR |
509 | static void delete_trigger_array_element(void *ptr) |
510 | { | |
511 | struct lttng_trigger *trigger = ptr; | |
512 | ||
513 | lttng_trigger_put(trigger); | |
514 | } | |
515 | ||
516 | LTTNG_HIDDEN | |
517 | struct lttng_triggers *lttng_triggers_create(void) | |
518 | { | |
519 | struct lttng_triggers *triggers = NULL; | |
520 | ||
521 | triggers = zmalloc(sizeof(*triggers)); | |
522 | if (!triggers) { | |
523 | goto end; | |
524 | } | |
525 | ||
526 | lttng_dynamic_pointer_array_init(&triggers->array, delete_trigger_array_element); | |
527 | ||
528 | end: | |
529 | return triggers; | |
530 | } | |
531 | ||
532 | LTTNG_HIDDEN | |
533 | struct lttng_trigger *lttng_triggers_borrow_mutable_at_index( | |
534 | const struct lttng_triggers *triggers, unsigned int index) | |
535 | { | |
536 | struct lttng_trigger *trigger = NULL; | |
537 | ||
a0377dfe | 538 | LTTNG_ASSERT(triggers); |
a02903c0 JR |
539 | if (index >= lttng_dynamic_pointer_array_get_count(&triggers->array)) { |
540 | goto end; | |
541 | } | |
542 | ||
543 | trigger = (struct lttng_trigger *) | |
544 | lttng_dynamic_pointer_array_get_pointer( | |
545 | &triggers->array, index); | |
546 | end: | |
547 | return trigger; | |
548 | } | |
549 | ||
550 | LTTNG_HIDDEN | |
551 | int lttng_triggers_add( | |
552 | struct lttng_triggers *triggers, struct lttng_trigger *trigger) | |
553 | { | |
554 | int ret; | |
555 | ||
a0377dfe FD |
556 | LTTNG_ASSERT(triggers); |
557 | LTTNG_ASSERT(trigger); | |
a02903c0 JR |
558 | |
559 | lttng_trigger_get(trigger); | |
560 | ||
561 | ret = lttng_dynamic_pointer_array_add_pointer(&triggers->array, trigger); | |
562 | if (ret) { | |
563 | lttng_trigger_put(trigger); | |
564 | } | |
565 | ||
566 | return ret; | |
567 | } | |
568 | ||
f2bda80e JG |
569 | LTTNG_HIDDEN |
570 | int lttng_triggers_remove_hidden_triggers(struct lttng_triggers *triggers) | |
571 | { | |
572 | int ret; | |
573 | unsigned int trigger_count, i = 0; | |
574 | enum lttng_trigger_status trigger_status; | |
575 | ||
a0377dfe | 576 | LTTNG_ASSERT(triggers); |
f2bda80e JG |
577 | |
578 | trigger_status = lttng_triggers_get_count(triggers, &trigger_count); | |
a0377dfe | 579 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
f2bda80e JG |
580 | |
581 | while (i < trigger_count) { | |
582 | const struct lttng_trigger *trigger = | |
583 | lttng_triggers_get_at_index(triggers, i); | |
584 | ||
585 | if (lttng_trigger_is_hidden(trigger)) { | |
586 | ret = lttng_dynamic_pointer_array_remove_pointer( | |
587 | &triggers->array, i); | |
588 | if (ret) { | |
589 | goto end; | |
590 | } | |
591 | ||
592 | trigger_count--; | |
593 | } else { | |
594 | i++; | |
595 | } | |
596 | } | |
597 | ||
598 | ret = 0; | |
599 | end: | |
600 | return ret; | |
601 | } | |
602 | ||
a02903c0 JR |
603 | const struct lttng_trigger *lttng_triggers_get_at_index( |
604 | const struct lttng_triggers *triggers, unsigned int index) | |
605 | { | |
606 | return lttng_triggers_borrow_mutable_at_index(triggers, index); | |
607 | } | |
608 | ||
609 | enum lttng_trigger_status lttng_triggers_get_count(const struct lttng_triggers *triggers, unsigned int *count) | |
610 | { | |
611 | enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK; | |
612 | ||
613 | if (!triggers || !count) { | |
614 | status = LTTNG_TRIGGER_STATUS_INVALID; | |
615 | goto end; | |
616 | } | |
617 | ||
618 | *count = lttng_dynamic_pointer_array_get_count(&triggers->array); | |
619 | end: | |
620 | return status; | |
621 | } | |
622 | ||
623 | void lttng_triggers_destroy(struct lttng_triggers *triggers) | |
624 | { | |
625 | if (!triggers) { | |
626 | return; | |
627 | } | |
628 | ||
629 | lttng_dynamic_pointer_array_reset(&triggers->array); | |
630 | free(triggers); | |
631 | } | |
632 | ||
633 | int lttng_triggers_serialize(const struct lttng_triggers *triggers, | |
634 | struct lttng_payload *payload) | |
635 | { | |
636 | int ret; | |
637 | unsigned int i, count; | |
638 | size_t size_before_payload; | |
639 | struct lttng_triggers_comm triggers_comm = {}; | |
640 | struct lttng_triggers_comm *header; | |
641 | enum lttng_trigger_status status; | |
642 | const size_t header_offset = payload->buffer.size; | |
643 | ||
644 | status = lttng_triggers_get_count(triggers, &count); | |
645 | if (status != LTTNG_TRIGGER_STATUS_OK) { | |
646 | ret = LTTNG_ERR_INVALID; | |
647 | goto end; | |
648 | } | |
649 | ||
650 | triggers_comm.count = count; | |
651 | ||
652 | /* Placeholder header; updated at the end. */ | |
653 | ret = lttng_dynamic_buffer_append(&payload->buffer, &triggers_comm, | |
654 | sizeof(triggers_comm)); | |
655 | if (ret) { | |
656 | goto end; | |
657 | } | |
658 | ||
659 | size_before_payload = payload->buffer.size; | |
660 | ||
661 | for (i = 0; i < count; i++) { | |
662 | const struct lttng_trigger *trigger = | |
663 | lttng_triggers_get_at_index(triggers, i); | |
664 | ||
a0377dfe | 665 | LTTNG_ASSERT(trigger); |
a02903c0 JR |
666 | |
667 | ret = lttng_trigger_serialize(trigger, payload); | |
668 | if (ret) { | |
669 | goto end; | |
670 | } | |
671 | } | |
672 | ||
673 | /* Update payload size. */ | |
674 | header = (struct lttng_triggers_comm *) ((char *) payload->buffer.data + header_offset); | |
675 | header->length = payload->buffer.size - size_before_payload; | |
676 | end: | |
677 | return ret; | |
678 | } | |
679 | ||
680 | LTTNG_HIDDEN | |
681 | ssize_t lttng_triggers_create_from_payload( | |
682 | struct lttng_payload_view *src_view, | |
683 | struct lttng_triggers **triggers) | |
684 | { | |
685 | ssize_t ret, offset = 0, triggers_size = 0; | |
686 | unsigned int i; | |
687 | const struct lttng_triggers_comm *triggers_comm; | |
688 | struct lttng_triggers *local_triggers = NULL; | |
689 | ||
690 | if (!src_view || !triggers) { | |
691 | ret = -1; | |
692 | goto error; | |
693 | } | |
694 | ||
695 | /* lttng_trigger_comms header */ | |
696 | triggers_comm = (const struct lttng_triggers_comm *) src_view->buffer.data; | |
697 | offset += sizeof(*triggers_comm); | |
698 | ||
699 | local_triggers = lttng_triggers_create(); | |
700 | if (!local_triggers) { | |
701 | ret = -1; | |
702 | goto error; | |
703 | } | |
704 | ||
705 | for (i = 0; i < triggers_comm->count; i++) { | |
706 | struct lttng_trigger *trigger = NULL; | |
707 | struct lttng_payload_view trigger_view = | |
708 | lttng_payload_view_from_view(src_view, offset, -1); | |
709 | ssize_t trigger_size; | |
710 | ||
711 | trigger_size = lttng_trigger_create_from_payload( | |
712 | &trigger_view, &trigger); | |
713 | if (trigger_size < 0) { | |
714 | ret = trigger_size; | |
715 | goto error; | |
716 | } | |
717 | ||
718 | /* Transfer ownership of the trigger to the collection. */ | |
719 | ret = lttng_triggers_add(local_triggers, trigger); | |
720 | lttng_trigger_put(trigger); | |
721 | if (ret < 0) { | |
722 | ret = -1; | |
723 | goto error; | |
724 | } | |
725 | ||
726 | offset += trigger_size; | |
727 | triggers_size += trigger_size; | |
728 | } | |
729 | ||
730 | /* Unexpected size of inner-elements; the buffer is corrupted. */ | |
731 | if ((ssize_t) triggers_comm->length != triggers_size) { | |
732 | ret = -1; | |
733 | goto error; | |
734 | } | |
735 | ||
736 | /* Pass ownership to caller. */ | |
737 | *triggers = local_triggers; | |
738 | local_triggers = NULL; | |
739 | ||
740 | ret = offset; | |
741 | error: | |
742 | ||
743 | lttng_triggers_destroy(local_triggers); | |
744 | return ret; | |
745 | } | |
746 | ||
3da864a9 JR |
747 | LTTNG_HIDDEN |
748 | const struct lttng_credentials *lttng_trigger_get_credentials( | |
749 | const struct lttng_trigger *trigger) | |
750 | { | |
64eafdf6 | 751 | return &trigger->creds; |
3da864a9 JR |
752 | } |
753 | ||
754 | LTTNG_HIDDEN | |
64eafdf6 | 755 | void lttng_trigger_set_credentials(struct lttng_trigger *trigger, |
3da864a9 JR |
756 | const struct lttng_credentials *creds) |
757 | { | |
a0377dfe | 758 | LTTNG_ASSERT(creds); |
64eafdf6 JR |
759 | trigger->creds = *creds; |
760 | } | |
761 | ||
762 | enum lttng_trigger_status lttng_trigger_set_owner_uid( | |
763 | struct lttng_trigger *trigger, uid_t uid) | |
764 | { | |
765 | enum lttng_trigger_status ret = LTTNG_TRIGGER_STATUS_OK; | |
d84c8ae3 | 766 | const uid_t euid = geteuid(); |
64eafdf6 JR |
767 | const struct lttng_credentials creds = { |
768 | .uid = LTTNG_OPTIONAL_INIT_VALUE(uid), | |
769 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
770 | }; | |
771 | ||
772 | if (!trigger) { | |
773 | ret = LTTNG_TRIGGER_STATUS_INVALID; | |
774 | goto end; | |
775 | } | |
776 | ||
777 | /* Client-side validation only to report a clearer error. */ | |
d84c8ae3 | 778 | if (euid != 0 && euid != uid) { |
64eafdf6 JR |
779 | ret = LTTNG_TRIGGER_STATUS_PERMISSION_DENIED; |
780 | goto end; | |
781 | } | |
782 | ||
783 | lttng_trigger_set_credentials(trigger, &creds); | |
784 | ||
785 | end: | |
786 | return ret; | |
787 | } | |
788 | ||
789 | enum lttng_trigger_status lttng_trigger_get_owner_uid( | |
790 | const struct lttng_trigger *trigger, uid_t *uid) | |
791 | { | |
792 | enum lttng_trigger_status ret = LTTNG_TRIGGER_STATUS_OK; | |
793 | const struct lttng_credentials *creds = NULL; | |
794 | ||
795 | if (!trigger || !uid ) { | |
796 | ret = LTTNG_TRIGGER_STATUS_INVALID; | |
797 | goto end; | |
798 | } | |
799 | ||
800 | if (!trigger->creds.uid.is_set ) { | |
801 | ret = LTTNG_TRIGGER_STATUS_UNSET; | |
802 | goto end; | |
803 | } | |
804 | ||
805 | creds = lttng_trigger_get_credentials(trigger); | |
806 | *uid = lttng_credentials_get_uid(creds); | |
807 | ||
808 | end: | |
809 | return ret; | |
3da864a9 | 810 | } |
5c504c41 | 811 | |
91c96f62 JR |
812 | LTTNG_HIDDEN |
813 | enum lttng_domain_type lttng_trigger_get_underlying_domain_type_restriction( | |
814 | const struct lttng_trigger *trigger) | |
815 | { | |
816 | enum lttng_domain_type type = LTTNG_DOMAIN_NONE; | |
817 | const struct lttng_event_rule *event_rule; | |
818 | enum lttng_condition_status c_status; | |
819 | enum lttng_condition_type c_type; | |
820 | ||
a0377dfe FD |
821 | LTTNG_ASSERT(trigger); |
822 | LTTNG_ASSERT(trigger->condition); | |
91c96f62 JR |
823 | |
824 | c_type = lttng_condition_get_type(trigger->condition); | |
825 | assert (c_type != LTTNG_CONDITION_TYPE_UNKNOWN); | |
826 | ||
827 | switch (c_type) { | |
828 | case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE: | |
829 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING: | |
830 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED: | |
831 | /* Apply to any domain. */ | |
832 | type = LTTNG_DOMAIN_NONE; | |
833 | break; | |
8dbb86b8 | 834 | case LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES: |
91c96f62 | 835 | /* Return the domain of the event rule. */ |
8dbb86b8 | 836 | c_status = lttng_condition_event_rule_matches_get_rule( |
91c96f62 | 837 | trigger->condition, &event_rule); |
a0377dfe | 838 | LTTNG_ASSERT(c_status == LTTNG_CONDITION_STATUS_OK); |
91c96f62 JR |
839 | type = lttng_event_rule_get_domain_type(event_rule); |
840 | break; | |
841 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH: | |
842 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW: | |
843 | /* Return the domain of the channel being monitored. */ | |
844 | c_status = lttng_condition_buffer_usage_get_domain_type( | |
845 | trigger->condition, &type); | |
a0377dfe | 846 | LTTNG_ASSERT(c_status == LTTNG_CONDITION_STATUS_OK); |
91c96f62 JR |
847 | break; |
848 | default: | |
849 | abort(); | |
850 | } | |
851 | ||
852 | return type; | |
853 | } | |
58daac01 JR |
854 | |
855 | /* | |
856 | * Generate bytecode related to the trigger. | |
857 | * On success LTTNG_OK. On error, returns lttng_error code. | |
858 | */ | |
859 | LTTNG_HIDDEN | |
860 | enum lttng_error_code lttng_trigger_generate_bytecode( | |
861 | struct lttng_trigger *trigger, | |
862 | const struct lttng_credentials *creds) | |
863 | { | |
864 | enum lttng_error_code ret; | |
865 | struct lttng_condition *condition = NULL; | |
866 | ||
867 | condition = lttng_trigger_get_condition(trigger); | |
868 | if (!condition) { | |
869 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
870 | goto end; | |
871 | } | |
872 | ||
873 | switch (lttng_condition_get_type(condition)) { | |
8dbb86b8 | 874 | case LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES: |
58daac01 JR |
875 | { |
876 | struct lttng_event_rule *event_rule; | |
877 | const enum lttng_condition_status condition_status = | |
8dbb86b8 JR |
878 | lttng_condition_event_rule_matches_borrow_rule_mutable( |
879 | condition, &event_rule); | |
58daac01 | 880 | |
a0377dfe | 881 | LTTNG_ASSERT(condition_status == LTTNG_CONDITION_STATUS_OK); |
f2e97f59 JR |
882 | |
883 | /* Generate the filter bytecode. */ | |
58daac01 JR |
884 | ret = lttng_event_rule_generate_filter_bytecode( |
885 | event_rule, creds); | |
886 | if (ret != LTTNG_OK) { | |
887 | goto end; | |
888 | } | |
889 | ||
f2e97f59 | 890 | /* Generate the capture bytecode. */ |
8dbb86b8 | 891 | ret = lttng_condition_event_rule_matches_generate_capture_descriptor_bytecode( |
f2e97f59 JR |
892 | condition); |
893 | if (ret != LTTNG_OK) { | |
894 | goto end; | |
895 | } | |
896 | ||
58daac01 JR |
897 | ret = LTTNG_OK; |
898 | break; | |
899 | } | |
900 | default: | |
901 | ret = LTTNG_OK; | |
902 | break; | |
903 | } | |
904 | end: | |
905 | return ret; | |
906 | } | |
b61776fb SM |
907 | |
908 | LTTNG_HIDDEN | |
909 | struct lttng_trigger *lttng_trigger_copy(const struct lttng_trigger *trigger) | |
910 | { | |
911 | int ret; | |
912 | struct lttng_payload copy_buffer; | |
94dbd8e4 JG |
913 | struct lttng_condition *condition_copy = NULL; |
914 | struct lttng_action *action_copy = NULL; | |
b61776fb | 915 | struct lttng_trigger *copy = NULL; |
94dbd8e4 JG |
916 | enum lttng_trigger_status trigger_status; |
917 | const char *trigger_name; | |
918 | uid_t trigger_owner_uid; | |
b61776fb SM |
919 | |
920 | lttng_payload_init(©_buffer); | |
921 | ||
94dbd8e4 | 922 | ret = lttng_condition_serialize(trigger->condition, ©_buffer); |
b61776fb SM |
923 | if (ret < 0) { |
924 | goto end; | |
925 | } | |
926 | ||
927 | { | |
928 | struct lttng_payload_view view = | |
929 | lttng_payload_view_from_payload( | |
930 | ©_buffer, 0, -1); | |
94dbd8e4 JG |
931 | |
932 | ret = lttng_condition_create_from_payload( | |
933 | &view, &condition_copy); | |
934 | if (ret < 0) { | |
935 | goto end; | |
936 | } | |
937 | } | |
938 | ||
939 | lttng_payload_clear(©_buffer); | |
940 | ||
941 | ret = lttng_action_serialize(trigger->action, ©_buffer); | |
942 | if (ret < 0) { | |
943 | goto end; | |
944 | } | |
945 | ||
946 | { | |
947 | struct lttng_payload_view view = | |
948 | lttng_payload_view_from_payload( | |
949 | ©_buffer, 0, -1); | |
950 | ||
951 | ret = lttng_action_create_from_payload( | |
952 | &view, &action_copy); | |
b61776fb | 953 | if (ret < 0) { |
b61776fb SM |
954 | goto end; |
955 | } | |
956 | } | |
957 | ||
94dbd8e4 JG |
958 | copy = lttng_trigger_create(condition_copy, action_copy); |
959 | if (!copy) { | |
960 | ERR("Failed to allocate trigger during trigger copy"); | |
961 | goto end; | |
962 | } | |
963 | ||
964 | trigger_status = lttng_trigger_get_name(trigger, &trigger_name); | |
965 | switch (trigger_status) { | |
966 | case LTTNG_TRIGGER_STATUS_OK: | |
967 | trigger_status = lttng_trigger_set_name(copy, trigger_name); | |
968 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
969 | ERR("Failed to set name of new trigger during copy"); | |
970 | goto error_cleanup_trigger; | |
971 | } | |
972 | break; | |
973 | case LTTNG_TRIGGER_STATUS_UNSET: | |
974 | break; | |
975 | default: | |
976 | ERR("Failed to get name of original trigger during copy"); | |
977 | goto error_cleanup_trigger; | |
978 | } | |
979 | ||
980 | trigger_status = lttng_trigger_get_owner_uid( | |
981 | trigger, &trigger_owner_uid); | |
982 | switch (trigger_status) { | |
983 | case LTTNG_TRIGGER_STATUS_OK: | |
984 | LTTNG_OPTIONAL_SET(©->creds.uid, trigger_owner_uid); | |
985 | break; | |
986 | case LTTNG_TRIGGER_STATUS_UNSET: | |
987 | break; | |
988 | default: | |
989 | ERR("Failed to get owner uid of original trigger during copy"); | |
990 | goto error_cleanup_trigger; | |
991 | } | |
992 | ||
993 | copy->tracer_token = trigger->tracer_token; | |
994 | copy->registered = trigger->registered; | |
f2bda80e | 995 | copy->is_hidden = trigger->is_hidden; |
94dbd8e4 JG |
996 | goto end; |
997 | ||
998 | error_cleanup_trigger: | |
999 | lttng_trigger_destroy(copy); | |
1000 | copy = NULL; | |
b61776fb | 1001 | end: |
94dbd8e4 JG |
1002 | lttng_condition_put(condition_copy); |
1003 | lttng_action_put(action_copy); | |
b61776fb SM |
1004 | lttng_payload_reset(©_buffer); |
1005 | return copy; | |
1006 | } | |
c738df17 FD |
1007 | |
1008 | LTTNG_HIDDEN | |
1009 | bool lttng_trigger_needs_tracer_notifier(const struct lttng_trigger *trigger) | |
1010 | { | |
1011 | bool needs_tracer_notifier = false; | |
1012 | const struct lttng_condition *condition = | |
1013 | lttng_trigger_get_const_condition(trigger); | |
1014 | ||
1015 | switch (lttng_condition_get_type(condition)) { | |
8dbb86b8 | 1016 | case LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES: |
c738df17 FD |
1017 | needs_tracer_notifier = true; |
1018 | goto end; | |
1019 | case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE: | |
1020 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH: | |
1021 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW: | |
1022 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING: | |
1023 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED: | |
1024 | goto end; | |
1025 | case LTTNG_CONDITION_TYPE_UNKNOWN: | |
1026 | default: | |
1027 | abort(); | |
1028 | } | |
1029 | end: | |
1030 | return needs_tracer_notifier; | |
1031 | } | |
9c374932 JR |
1032 | |
1033 | LTTNG_HIDDEN | |
1034 | void lttng_trigger_set_as_registered(struct lttng_trigger *trigger) | |
1035 | { | |
1036 | pthread_mutex_lock(&trigger->lock); | |
1037 | trigger->registered = true; | |
1038 | pthread_mutex_unlock(&trigger->lock); | |
1039 | } | |
1040 | ||
1041 | LTTNG_HIDDEN | |
1042 | void lttng_trigger_set_as_unregistered(struct lttng_trigger *trigger) | |
1043 | { | |
1044 | pthread_mutex_lock(&trigger->lock); | |
1045 | trigger->registered = false; | |
1046 | pthread_mutex_unlock(&trigger->lock); | |
1047 | } | |
1048 | ||
1049 | /* | |
1050 | * The trigger must be locked before calling lttng_trigger_registered. | |
1051 | * The lock is necessary since a trigger can be unregistered at anytime. | |
1052 | * Manipulations requiring that the trigger be registered must always acquire | |
1053 | * the trigger lock for the duration of the manipulation using | |
1054 | * `lttng_trigger_lock` and `lttng_trigger_unlock`. | |
1055 | */ | |
1056 | LTTNG_HIDDEN | |
1057 | bool lttng_trigger_is_registered(struct lttng_trigger *trigger) | |
1058 | { | |
1059 | ASSERT_LOCKED(trigger->lock); | |
1060 | return trigger->registered; | |
1061 | } | |
1062 | ||
1063 | LTTNG_HIDDEN | |
1064 | void lttng_trigger_lock(struct lttng_trigger *trigger) | |
1065 | { | |
1066 | pthread_mutex_lock(&trigger->lock); | |
1067 | } | |
1068 | ||
1069 | LTTNG_HIDDEN | |
1070 | void lttng_trigger_unlock(struct lttng_trigger *trigger) | |
1071 | { | |
1072 | pthread_mutex_unlock(&trigger->lock); | |
1073 | } | |
6a751b95 JR |
1074 | |
1075 | LTTNG_HIDDEN | |
1076 | enum lttng_error_code lttng_trigger_mi_serialize(const struct lttng_trigger *trigger, | |
1077 | struct mi_writer *writer, | |
1078 | const struct mi_lttng_error_query_callbacks | |
1079 | *error_query_callbacks) | |
1080 | { | |
1081 | int ret; | |
1082 | enum lttng_error_code ret_code; | |
1083 | enum lttng_trigger_status trigger_status; | |
1084 | const struct lttng_condition *condition = NULL; | |
1085 | const struct lttng_action *action = NULL; | |
1086 | struct lttng_dynamic_array action_path_indexes; | |
1087 | uid_t owner_uid; | |
1088 | ||
a0377dfe FD |
1089 | LTTNG_ASSERT(trigger); |
1090 | LTTNG_ASSERT(writer); | |
6a751b95 JR |
1091 | |
1092 | lttng_dynamic_array_init(&action_path_indexes, sizeof(uint64_t), NULL); | |
1093 | ||
1094 | /* Open trigger element. */ | |
1095 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_trigger); | |
1096 | if (ret) { | |
1097 | goto mi_error; | |
1098 | } | |
1099 | ||
1100 | trigger_status = lttng_trigger_get_owner_uid(trigger, &owner_uid); | |
a0377dfe | 1101 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
6a751b95 JR |
1102 | |
1103 | /* Name. */ | |
1104 | ret = mi_lttng_writer_write_element_string( | |
1105 | writer, config_element_name, trigger->name); | |
1106 | if (ret) { | |
1107 | goto mi_error; | |
1108 | } | |
1109 | ||
1110 | /* Owner uid. */ | |
1111 | ret = mi_lttng_writer_write_element_signed_int(writer, | |
1112 | mi_lttng_element_trigger_owner_uid, | |
1113 | (int64_t) owner_uid); | |
1114 | if (ret) { | |
1115 | goto mi_error; | |
1116 | } | |
1117 | ||
1118 | /* Condition. */ | |
1119 | condition = lttng_trigger_get_const_condition(trigger); | |
a0377dfe | 1120 | LTTNG_ASSERT(condition); |
6a751b95 JR |
1121 | ret_code = lttng_condition_mi_serialize( |
1122 | trigger, condition, writer, error_query_callbacks); | |
1123 | if (ret_code != LTTNG_OK) { | |
1124 | goto end; | |
1125 | } | |
1126 | ||
1127 | /* Action. */ | |
1128 | action = lttng_trigger_get_const_action(trigger); | |
a0377dfe | 1129 | LTTNG_ASSERT(action); |
6a751b95 JR |
1130 | ret_code = lttng_action_mi_serialize(trigger, action, writer, |
1131 | error_query_callbacks, &action_path_indexes); | |
1132 | if (ret_code != LTTNG_OK) { | |
1133 | goto end; | |
1134 | } | |
1135 | ||
1136 | if (error_query_callbacks && error_query_callbacks->trigger_cb) { | |
1137 | struct lttng_error_query_results *results = NULL; | |
1138 | ||
1139 | ret_code = error_query_callbacks->trigger_cb(trigger, &results); | |
1140 | if (ret_code != LTTNG_OK) { | |
1141 | goto end; | |
1142 | } | |
1143 | ||
1144 | ret_code = lttng_error_query_results_mi_serialize( | |
1145 | results, writer); | |
1146 | lttng_error_query_results_destroy(results); | |
1147 | if (ret_code != LTTNG_OK) { | |
1148 | goto end; | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | /* Close trigger element. */ | |
1153 | ret = mi_lttng_writer_close_element(writer); | |
1154 | if (ret) { | |
1155 | goto mi_error; | |
1156 | } | |
1157 | ||
1158 | ret_code = LTTNG_OK; | |
1159 | goto end; | |
1160 | ||
1161 | mi_error: | |
1162 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
1163 | end: | |
1164 | lttng_dynamic_array_reset(&action_path_indexes); | |
1165 | return ret_code; | |
1166 | } | |
1167 | ||
1168 | /* Used by qsort, which expects the semantics of strcmp(). */ | |
1169 | static int compare_triggers_by_name(const void *a, const void *b) | |
1170 | { | |
1171 | const struct lttng_trigger *trigger_a = | |
1172 | *((const struct lttng_trigger **) a); | |
1173 | const struct lttng_trigger *trigger_b = | |
1174 | *((const struct lttng_trigger **) b); | |
1175 | const char *name_a, *name_b; | |
1176 | enum lttng_trigger_status trigger_status; | |
1177 | ||
1178 | /* Anonymous triggers are not reachable here. */ | |
1179 | trigger_status = lttng_trigger_get_name(trigger_a, &name_a); | |
a0377dfe | 1180 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
6a751b95 JR |
1181 | |
1182 | trigger_status = lttng_trigger_get_name(trigger_b, &name_b); | |
a0377dfe | 1183 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
6a751b95 JR |
1184 | |
1185 | return strcmp(name_a, name_b); | |
1186 | } | |
1187 | ||
1188 | LTTNG_HIDDEN | |
1189 | enum lttng_error_code lttng_triggers_mi_serialize(const struct lttng_triggers *triggers, | |
1190 | struct mi_writer *writer, | |
1191 | const struct mi_lttng_error_query_callbacks | |
1192 | *error_query_callbacks) | |
1193 | { | |
1194 | int ret; | |
1195 | enum lttng_error_code ret_code; | |
1196 | enum lttng_trigger_status status; | |
1197 | unsigned int count, i; | |
1198 | struct lttng_dynamic_pointer_array sorted_triggers; | |
1199 | ||
a0377dfe FD |
1200 | LTTNG_ASSERT(triggers); |
1201 | LTTNG_ASSERT(writer); | |
6a751b95 JR |
1202 | |
1203 | /* | |
1204 | * Sort trigger by name to ensure an order at the MI level and ignore | |
1205 | * any anonymous trigger present. | |
1206 | */ | |
1207 | lttng_dynamic_pointer_array_init(&sorted_triggers, NULL); | |
1208 | ||
1209 | status = lttng_triggers_get_count(triggers, &count); | |
a0377dfe | 1210 | LTTNG_ASSERT(status == LTTNG_TRIGGER_STATUS_OK); |
6a751b95 JR |
1211 | |
1212 | for (i = 0; i < count; i++) { | |
1213 | int add_ret; | |
1214 | const char *unused_name; | |
1215 | const struct lttng_trigger *trigger = | |
1216 | lttng_triggers_get_at_index(triggers, i); | |
1217 | ||
1218 | status = lttng_trigger_get_name(trigger, &unused_name); | |
1219 | switch (status) { | |
1220 | case LTTNG_TRIGGER_STATUS_OK: | |
1221 | break; | |
1222 | case LTTNG_TRIGGER_STATUS_UNSET: | |
1223 | /* Don't list anonymous triggers. */ | |
1224 | continue; | |
1225 | default: | |
1226 | abort(); | |
1227 | } | |
1228 | ||
1229 | add_ret = lttng_dynamic_pointer_array_add_pointer( | |
1230 | &sorted_triggers, (void *) trigger); | |
1231 | ||
1232 | if (add_ret) { | |
1233 | ERR("Failed to lttng_trigger to sorting array."); | |
1234 | ret_code = LTTNG_ERR_NOMEM; | |
1235 | goto error; | |
1236 | } | |
1237 | } | |
1238 | ||
1239 | qsort(sorted_triggers.array.buffer.data, count, | |
1240 | sizeof(struct lttng_trigger *), | |
1241 | compare_triggers_by_name); | |
1242 | ||
1243 | /* Open triggers element. */ | |
1244 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_triggers); | |
1245 | if (ret) { | |
1246 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
1247 | goto error; | |
1248 | } | |
1249 | ||
1250 | for (i = 0; i < lttng_dynamic_pointer_array_get_count(&sorted_triggers); i++) { | |
1251 | const struct lttng_trigger *trigger = | |
1252 | (const struct lttng_trigger *) | |
1253 | lttng_dynamic_pointer_array_get_pointer( | |
1254 | &sorted_triggers, i); | |
1255 | ||
1256 | lttng_trigger_mi_serialize(trigger, writer, error_query_callbacks); | |
1257 | } | |
1258 | ||
1259 | /* Close triggers element. */ | |
1260 | ret = mi_lttng_writer_close_element(writer); | |
1261 | if (ret) { | |
1262 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
1263 | goto error; | |
1264 | } | |
1265 | ||
1266 | ret_code = LTTNG_OK; | |
1267 | ||
1268 | error: | |
1269 | lttng_dynamic_pointer_array_reset(&sorted_triggers); | |
1270 | return ret_code; | |
1271 | } |