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 | ||
c9e313bc SM |
8 | #include <common/credentials.hpp> |
9 | #include <common/dynamic-array.hpp> | |
10 | #include <common/error.hpp> | |
11 | #include <common/mi-lttng.hpp> | |
12 | #include <common/optional.hpp> | |
13 | #include <common/payload-view.hpp> | |
14 | #include <common/payload.hpp> | |
242388e4 | 15 | #include <inttypes.h> |
c9e313bc | 16 | #include <lttng/action/action-internal.hpp> |
9c374932 | 17 | #include <lttng/condition/buffer-usage.h> |
c9e313bc SM |
18 | #include <lttng/condition/condition-internal.hpp> |
19 | #include <lttng/condition/event-rule-matches-internal.hpp> | |
670a26e4 | 20 | #include <lttng/condition/event-rule-matches.h> |
9c374932 | 21 | #include <lttng/domain.h> |
c9e313bc SM |
22 | #include <lttng/error-query-internal.hpp> |
23 | #include <lttng/event-expr-internal.hpp> | |
24 | #include <lttng/event-rule/event-rule-internal.hpp> | |
25 | #include <lttng/trigger/trigger-internal.hpp> | |
9c374932 | 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 | ||
64803277 | 58 | trigger = zmalloc<lttng_trigger>(); |
a58c490f JG |
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 | 114 | struct lttng_trigger *trigger = |
0114db0e | 115 | lttng::utils::container_of(ref, <tng_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 | ||
f4d2c26a JG |
269 | if (trigger_comm->is_hidden) { |
270 | lttng_trigger_set_hidden(trigger); | |
271 | } | |
272 | ||
a58c490f | 273 | ret = offset; |
7ca172c1 | 274 | |
a58c490f | 275 | error: |
1065801b JG |
276 | lttng_condition_put(condition); |
277 | lttng_action_put(action); | |
7ca172c1 | 278 | end: |
f5d98ed9 | 279 | if (ret >= 0) { |
6808ef55 JG |
280 | *_trigger = trigger; |
281 | } else { | |
282 | lttng_trigger_put(trigger); | |
283 | } | |
284 | ||
a58c490f JG |
285 | return ret; |
286 | } | |
287 | ||
288 | /* | |
a58c490f JG |
289 | * Both elements are stored contiguously, see their "*_comm" structure |
290 | * for the detailed format. | |
291 | */ | |
a02903c0 | 292 | int lttng_trigger_serialize(const struct lttng_trigger *trigger, |
c0a66c84 | 293 | struct lttng_payload *payload) |
a58c490f | 294 | { |
3647288f | 295 | int ret; |
242388e4 | 296 | size_t header_offset, size_before_payload, size_name; |
c0a66c84 | 297 | struct lttng_trigger_comm trigger_comm = {}; |
3647288f | 298 | struct lttng_trigger_comm *header; |
64eafdf6 JR |
299 | const struct lttng_credentials *creds = NULL; |
300 | ||
301 | creds = lttng_trigger_get_credentials(trigger); | |
a0377dfe | 302 | LTTNG_ASSERT(creds); |
64eafdf6 JR |
303 | |
304 | trigger_comm.uid = LTTNG_OPTIONAL_GET(creds->uid); | |
a58c490f | 305 | |
242388e4 JR |
306 | if (trigger->name != NULL) { |
307 | size_name = strlen(trigger->name) + 1; | |
308 | } else { | |
309 | size_name = 0; | |
310 | } | |
311 | ||
312 | trigger_comm.name_length = size_name; | |
313 | ||
f4d2c26a JG |
314 | trigger_comm.is_hidden = lttng_trigger_is_hidden(trigger); |
315 | ||
c0a66c84 JG |
316 | header_offset = payload->buffer.size; |
317 | ret = lttng_dynamic_buffer_append(&payload->buffer, &trigger_comm, | |
3647288f JG |
318 | sizeof(trigger_comm)); |
319 | if (ret) { | |
a58c490f JG |
320 | goto end; |
321 | } | |
322 | ||
c0a66c84 | 323 | size_before_payload = payload->buffer.size; |
242388e4 JR |
324 | |
325 | /* Trigger name. */ | |
326 | ret = lttng_dynamic_buffer_append( | |
327 | &payload->buffer, trigger->name, size_name); | |
328 | if (ret) { | |
329 | goto end; | |
330 | } | |
331 | ||
c0a66c84 | 332 | ret = lttng_condition_serialize(trigger->condition, payload); |
3647288f | 333 | if (ret) { |
a58c490f JG |
334 | goto end; |
335 | } | |
a58c490f | 336 | |
c0a66c84 | 337 | ret = lttng_action_serialize(trigger->action, payload); |
3647288f | 338 | if (ret) { |
a58c490f JG |
339 | goto end; |
340 | } | |
a58c490f | 341 | |
3647288f | 342 | /* Update payload size. */ |
c0a66c84 JG |
343 | header = (typeof(header)) (payload->buffer.data + header_offset); |
344 | header->length = payload->buffer.size - size_before_payload; | |
a58c490f JG |
345 | end: |
346 | return ret; | |
347 | } | |
3da864a9 | 348 | |
85c06c44 JR |
349 | bool lttng_trigger_is_equal( |
350 | const struct lttng_trigger *a, const struct lttng_trigger *b) | |
351 | { | |
0efb2ad7 JG |
352 | if (!!a->name != !!b->name) { |
353 | /* Both must be either anonymous or named. */ | |
354 | return false; | |
355 | } | |
356 | ||
357 | if (a->name && strcmp(a->name, b->name) != 0) { | |
1ca78886 FD |
358 | return false; |
359 | } | |
360 | ||
85c06c44 JR |
361 | if (!lttng_condition_is_equal(a->condition, b->condition)) { |
362 | return false; | |
363 | } | |
364 | ||
365 | if (!lttng_action_is_equal(a->action, b->action)) { | |
366 | return false; | |
367 | } | |
368 | ||
369 | if (!lttng_credentials_is_equal(lttng_trigger_get_credentials(a), | |
370 | lttng_trigger_get_credentials(b))) { | |
371 | return false; | |
372 | } | |
373 | ||
f2bda80e JG |
374 | if (a->is_hidden != b->is_hidden) { |
375 | return false; | |
376 | } | |
377 | ||
85c06c44 JR |
378 | return true; |
379 | } | |
380 | ||
f2bda80e JG |
381 | bool lttng_trigger_is_hidden(const struct lttng_trigger *trigger) |
382 | { | |
6ce1601f | 383 | LTTNG_ASSERT(trigger); |
f2bda80e JG |
384 | return trigger->is_hidden; |
385 | } | |
386 | ||
f2bda80e JG |
387 | void lttng_trigger_set_hidden(struct lttng_trigger *trigger) |
388 | { | |
a0377dfe | 389 | LTTNG_ASSERT(!trigger->is_hidden); |
f2bda80e JG |
390 | trigger->is_hidden = true; |
391 | } | |
392 | ||
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 | ||
242388e4 JR |
439 | int lttng_trigger_assign_name(struct lttng_trigger *dst, |
440 | const struct lttng_trigger *src) | |
441 | { | |
442 | int ret = 0; | |
443 | enum lttng_trigger_status status; | |
444 | ||
445 | status = lttng_trigger_set_name(dst, src->name); | |
446 | if (status != LTTNG_TRIGGER_STATUS_OK) { | |
447 | ret = -1; | |
448 | ERR("Failed to set name for trigger"); | |
449 | goto end; | |
450 | } | |
451 | end: | |
452 | return ret; | |
453 | } | |
454 | ||
e6887944 JR |
455 | void lttng_trigger_set_tracer_token(struct lttng_trigger *trigger, |
456 | uint64_t token) | |
457 | { | |
a0377dfe | 458 | LTTNG_ASSERT(trigger); |
e6887944 JR |
459 | LTTNG_OPTIONAL_SET(&trigger->tracer_token, token); |
460 | } | |
461 | ||
e6887944 JR |
462 | uint64_t lttng_trigger_get_tracer_token(const struct lttng_trigger *trigger) |
463 | { | |
a0377dfe | 464 | LTTNG_ASSERT(trigger); |
e6887944 JR |
465 | |
466 | return LTTNG_OPTIONAL_GET(trigger->tracer_token); | |
467 | } | |
468 | ||
242388e4 JR |
469 | int lttng_trigger_generate_name(struct lttng_trigger *trigger, |
470 | uint64_t unique_id) | |
471 | { | |
472 | int ret = 0; | |
473 | char *generated_name = NULL; | |
474 | ||
80ea4bfa | 475 | ret = asprintf(&generated_name, "trigger%" PRIu64 "", unique_id); |
242388e4 JR |
476 | if (ret < 0) { |
477 | ERR("Failed to generate trigger name"); | |
478 | ret = -1; | |
479 | goto end; | |
480 | } | |
481 | ||
482 | ret = 0; | |
483 | free(trigger->name); | |
484 | trigger->name = generated_name; | |
485 | end: | |
486 | return ret; | |
487 | } | |
488 | ||
f01d28b4 JR |
489 | void lttng_trigger_get(struct lttng_trigger *trigger) |
490 | { | |
491 | urcu_ref_get(&trigger->ref); | |
492 | } | |
493 | ||
f01d28b4 JR |
494 | void lttng_trigger_put(struct lttng_trigger *trigger) |
495 | { | |
496 | if (!trigger) { | |
497 | return; | |
498 | } | |
499 | ||
500 | urcu_ref_put(&trigger->ref , trigger_destroy_ref); | |
501 | } | |
502 | ||
a02903c0 JR |
503 | static void delete_trigger_array_element(void *ptr) |
504 | { | |
a6bc4ca9 | 505 | struct lttng_trigger *trigger = (lttng_trigger *) ptr; |
a02903c0 JR |
506 | |
507 | lttng_trigger_put(trigger); | |
508 | } | |
509 | ||
a02903c0 JR |
510 | struct lttng_triggers *lttng_triggers_create(void) |
511 | { | |
512 | struct lttng_triggers *triggers = NULL; | |
513 | ||
64803277 | 514 | triggers = zmalloc<lttng_triggers>(); |
a02903c0 JR |
515 | if (!triggers) { |
516 | goto end; | |
517 | } | |
518 | ||
519 | lttng_dynamic_pointer_array_init(&triggers->array, delete_trigger_array_element); | |
520 | ||
521 | end: | |
522 | return triggers; | |
523 | } | |
524 | ||
a02903c0 JR |
525 | struct lttng_trigger *lttng_triggers_borrow_mutable_at_index( |
526 | const struct lttng_triggers *triggers, unsigned int index) | |
527 | { | |
528 | struct lttng_trigger *trigger = NULL; | |
529 | ||
a0377dfe | 530 | LTTNG_ASSERT(triggers); |
a02903c0 JR |
531 | if (index >= lttng_dynamic_pointer_array_get_count(&triggers->array)) { |
532 | goto end; | |
533 | } | |
534 | ||
535 | trigger = (struct lttng_trigger *) | |
536 | lttng_dynamic_pointer_array_get_pointer( | |
537 | &triggers->array, index); | |
538 | end: | |
539 | return trigger; | |
540 | } | |
541 | ||
a02903c0 JR |
542 | int lttng_triggers_add( |
543 | struct lttng_triggers *triggers, struct lttng_trigger *trigger) | |
544 | { | |
545 | int ret; | |
546 | ||
a0377dfe FD |
547 | LTTNG_ASSERT(triggers); |
548 | LTTNG_ASSERT(trigger); | |
a02903c0 JR |
549 | |
550 | lttng_trigger_get(trigger); | |
551 | ||
552 | ret = lttng_dynamic_pointer_array_add_pointer(&triggers->array, trigger); | |
553 | if (ret) { | |
554 | lttng_trigger_put(trigger); | |
555 | } | |
556 | ||
557 | return ret; | |
558 | } | |
559 | ||
f2bda80e JG |
560 | int lttng_triggers_remove_hidden_triggers(struct lttng_triggers *triggers) |
561 | { | |
562 | int ret; | |
563 | unsigned int trigger_count, i = 0; | |
564 | enum lttng_trigger_status trigger_status; | |
565 | ||
a0377dfe | 566 | LTTNG_ASSERT(triggers); |
f2bda80e JG |
567 | |
568 | trigger_status = lttng_triggers_get_count(triggers, &trigger_count); | |
a0377dfe | 569 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
f2bda80e JG |
570 | |
571 | while (i < trigger_count) { | |
572 | const struct lttng_trigger *trigger = | |
573 | lttng_triggers_get_at_index(triggers, i); | |
574 | ||
575 | if (lttng_trigger_is_hidden(trigger)) { | |
576 | ret = lttng_dynamic_pointer_array_remove_pointer( | |
577 | &triggers->array, i); | |
578 | if (ret) { | |
579 | goto end; | |
580 | } | |
581 | ||
582 | trigger_count--; | |
583 | } else { | |
584 | i++; | |
585 | } | |
586 | } | |
587 | ||
588 | ret = 0; | |
589 | end: | |
590 | return ret; | |
591 | } | |
592 | ||
a02903c0 JR |
593 | const struct lttng_trigger *lttng_triggers_get_at_index( |
594 | const struct lttng_triggers *triggers, unsigned int index) | |
595 | { | |
596 | return lttng_triggers_borrow_mutable_at_index(triggers, index); | |
597 | } | |
598 | ||
599 | enum lttng_trigger_status lttng_triggers_get_count(const struct lttng_triggers *triggers, unsigned int *count) | |
600 | { | |
601 | enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK; | |
602 | ||
603 | if (!triggers || !count) { | |
604 | status = LTTNG_TRIGGER_STATUS_INVALID; | |
605 | goto end; | |
606 | } | |
607 | ||
608 | *count = lttng_dynamic_pointer_array_get_count(&triggers->array); | |
609 | end: | |
610 | return status; | |
611 | } | |
612 | ||
613 | void lttng_triggers_destroy(struct lttng_triggers *triggers) | |
614 | { | |
615 | if (!triggers) { | |
616 | return; | |
617 | } | |
618 | ||
619 | lttng_dynamic_pointer_array_reset(&triggers->array); | |
620 | free(triggers); | |
621 | } | |
622 | ||
623 | int lttng_triggers_serialize(const struct lttng_triggers *triggers, | |
624 | struct lttng_payload *payload) | |
625 | { | |
626 | int ret; | |
627 | unsigned int i, count; | |
628 | size_t size_before_payload; | |
629 | struct lttng_triggers_comm triggers_comm = {}; | |
630 | struct lttng_triggers_comm *header; | |
631 | enum lttng_trigger_status status; | |
632 | const size_t header_offset = payload->buffer.size; | |
633 | ||
634 | status = lttng_triggers_get_count(triggers, &count); | |
635 | if (status != LTTNG_TRIGGER_STATUS_OK) { | |
636 | ret = LTTNG_ERR_INVALID; | |
637 | goto end; | |
638 | } | |
639 | ||
640 | triggers_comm.count = count; | |
641 | ||
642 | /* Placeholder header; updated at the end. */ | |
643 | ret = lttng_dynamic_buffer_append(&payload->buffer, &triggers_comm, | |
644 | sizeof(triggers_comm)); | |
645 | if (ret) { | |
646 | goto end; | |
647 | } | |
648 | ||
649 | size_before_payload = payload->buffer.size; | |
650 | ||
651 | for (i = 0; i < count; i++) { | |
652 | const struct lttng_trigger *trigger = | |
653 | lttng_triggers_get_at_index(triggers, i); | |
654 | ||
a0377dfe | 655 | LTTNG_ASSERT(trigger); |
a02903c0 JR |
656 | |
657 | ret = lttng_trigger_serialize(trigger, payload); | |
658 | if (ret) { | |
659 | goto end; | |
660 | } | |
661 | } | |
662 | ||
663 | /* Update payload size. */ | |
664 | header = (struct lttng_triggers_comm *) ((char *) payload->buffer.data + header_offset); | |
665 | header->length = payload->buffer.size - size_before_payload; | |
666 | end: | |
667 | return ret; | |
668 | } | |
669 | ||
a02903c0 JR |
670 | ssize_t lttng_triggers_create_from_payload( |
671 | struct lttng_payload_view *src_view, | |
672 | struct lttng_triggers **triggers) | |
673 | { | |
674 | ssize_t ret, offset = 0, triggers_size = 0; | |
675 | unsigned int i; | |
676 | const struct lttng_triggers_comm *triggers_comm; | |
677 | struct lttng_triggers *local_triggers = NULL; | |
678 | ||
679 | if (!src_view || !triggers) { | |
680 | ret = -1; | |
681 | goto error; | |
682 | } | |
683 | ||
684 | /* lttng_trigger_comms header */ | |
685 | triggers_comm = (const struct lttng_triggers_comm *) src_view->buffer.data; | |
686 | offset += sizeof(*triggers_comm); | |
687 | ||
688 | local_triggers = lttng_triggers_create(); | |
689 | if (!local_triggers) { | |
690 | ret = -1; | |
691 | goto error; | |
692 | } | |
693 | ||
694 | for (i = 0; i < triggers_comm->count; i++) { | |
695 | struct lttng_trigger *trigger = NULL; | |
696 | struct lttng_payload_view trigger_view = | |
697 | lttng_payload_view_from_view(src_view, offset, -1); | |
698 | ssize_t trigger_size; | |
699 | ||
700 | trigger_size = lttng_trigger_create_from_payload( | |
701 | &trigger_view, &trigger); | |
702 | if (trigger_size < 0) { | |
703 | ret = trigger_size; | |
704 | goto error; | |
705 | } | |
706 | ||
707 | /* Transfer ownership of the trigger to the collection. */ | |
708 | ret = lttng_triggers_add(local_triggers, trigger); | |
709 | lttng_trigger_put(trigger); | |
710 | if (ret < 0) { | |
711 | ret = -1; | |
712 | goto error; | |
713 | } | |
714 | ||
715 | offset += trigger_size; | |
716 | triggers_size += trigger_size; | |
717 | } | |
718 | ||
719 | /* Unexpected size of inner-elements; the buffer is corrupted. */ | |
720 | if ((ssize_t) triggers_comm->length != triggers_size) { | |
721 | ret = -1; | |
722 | goto error; | |
723 | } | |
724 | ||
725 | /* Pass ownership to caller. */ | |
726 | *triggers = local_triggers; | |
727 | local_triggers = NULL; | |
728 | ||
729 | ret = offset; | |
730 | error: | |
731 | ||
732 | lttng_triggers_destroy(local_triggers); | |
733 | return ret; | |
734 | } | |
735 | ||
3da864a9 JR |
736 | const struct lttng_credentials *lttng_trigger_get_credentials( |
737 | const struct lttng_trigger *trigger) | |
738 | { | |
64eafdf6 | 739 | return &trigger->creds; |
3da864a9 JR |
740 | } |
741 | ||
64eafdf6 | 742 | void lttng_trigger_set_credentials(struct lttng_trigger *trigger, |
3da864a9 JR |
743 | const struct lttng_credentials *creds) |
744 | { | |
f4d2c26a | 745 | /* Triggers do not use the group id to authenticate the user. */ |
a0377dfe | 746 | LTTNG_ASSERT(creds); |
f4d2c26a JG |
747 | LTTNG_OPTIONAL_SET(&trigger->creds.uid, LTTNG_OPTIONAL_GET(creds->uid)); |
748 | LTTNG_OPTIONAL_UNSET(&trigger->creds.gid); | |
64eafdf6 JR |
749 | } |
750 | ||
751 | enum lttng_trigger_status lttng_trigger_set_owner_uid( | |
752 | struct lttng_trigger *trigger, uid_t uid) | |
753 | { | |
754 | enum lttng_trigger_status ret = LTTNG_TRIGGER_STATUS_OK; | |
d84c8ae3 | 755 | const uid_t euid = geteuid(); |
64eafdf6 JR |
756 | const struct lttng_credentials creds = { |
757 | .uid = LTTNG_OPTIONAL_INIT_VALUE(uid), | |
758 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
759 | }; | |
760 | ||
761 | if (!trigger) { | |
762 | ret = LTTNG_TRIGGER_STATUS_INVALID; | |
763 | goto end; | |
764 | } | |
765 | ||
766 | /* Client-side validation only to report a clearer error. */ | |
d84c8ae3 | 767 | if (euid != 0 && euid != uid) { |
64eafdf6 JR |
768 | ret = LTTNG_TRIGGER_STATUS_PERMISSION_DENIED; |
769 | goto end; | |
770 | } | |
771 | ||
772 | lttng_trigger_set_credentials(trigger, &creds); | |
773 | ||
774 | end: | |
775 | return ret; | |
776 | } | |
777 | ||
778 | enum lttng_trigger_status lttng_trigger_get_owner_uid( | |
779 | const struct lttng_trigger *trigger, uid_t *uid) | |
780 | { | |
781 | enum lttng_trigger_status ret = LTTNG_TRIGGER_STATUS_OK; | |
782 | const struct lttng_credentials *creds = NULL; | |
783 | ||
784 | if (!trigger || !uid ) { | |
785 | ret = LTTNG_TRIGGER_STATUS_INVALID; | |
786 | goto end; | |
787 | } | |
788 | ||
789 | if (!trigger->creds.uid.is_set ) { | |
790 | ret = LTTNG_TRIGGER_STATUS_UNSET; | |
791 | goto end; | |
792 | } | |
793 | ||
794 | creds = lttng_trigger_get_credentials(trigger); | |
795 | *uid = lttng_credentials_get_uid(creds); | |
796 | ||
797 | end: | |
798 | return ret; | |
3da864a9 | 799 | } |
5c504c41 | 800 | |
91c96f62 JR |
801 | enum lttng_domain_type lttng_trigger_get_underlying_domain_type_restriction( |
802 | const struct lttng_trigger *trigger) | |
803 | { | |
804 | enum lttng_domain_type type = LTTNG_DOMAIN_NONE; | |
805 | const struct lttng_event_rule *event_rule; | |
806 | enum lttng_condition_status c_status; | |
807 | enum lttng_condition_type c_type; | |
808 | ||
a0377dfe FD |
809 | LTTNG_ASSERT(trigger); |
810 | LTTNG_ASSERT(trigger->condition); | |
91c96f62 JR |
811 | |
812 | c_type = lttng_condition_get_type(trigger->condition); | |
813 | assert (c_type != LTTNG_CONDITION_TYPE_UNKNOWN); | |
814 | ||
815 | switch (c_type) { | |
816 | case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE: | |
817 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING: | |
818 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED: | |
819 | /* Apply to any domain. */ | |
820 | type = LTTNG_DOMAIN_NONE; | |
821 | break; | |
8dbb86b8 | 822 | case LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES: |
91c96f62 | 823 | /* Return the domain of the event rule. */ |
8dbb86b8 | 824 | c_status = lttng_condition_event_rule_matches_get_rule( |
91c96f62 | 825 | trigger->condition, &event_rule); |
a0377dfe | 826 | LTTNG_ASSERT(c_status == LTTNG_CONDITION_STATUS_OK); |
91c96f62 JR |
827 | type = lttng_event_rule_get_domain_type(event_rule); |
828 | break; | |
829 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH: | |
830 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW: | |
831 | /* Return the domain of the channel being monitored. */ | |
832 | c_status = lttng_condition_buffer_usage_get_domain_type( | |
833 | trigger->condition, &type); | |
a0377dfe | 834 | LTTNG_ASSERT(c_status == LTTNG_CONDITION_STATUS_OK); |
91c96f62 JR |
835 | break; |
836 | default: | |
837 | abort(); | |
838 | } | |
839 | ||
840 | return type; | |
841 | } | |
58daac01 JR |
842 | |
843 | /* | |
844 | * Generate bytecode related to the trigger. | |
845 | * On success LTTNG_OK. On error, returns lttng_error code. | |
846 | */ | |
58daac01 JR |
847 | enum lttng_error_code lttng_trigger_generate_bytecode( |
848 | struct lttng_trigger *trigger, | |
849 | const struct lttng_credentials *creds) | |
850 | { | |
851 | enum lttng_error_code ret; | |
852 | struct lttng_condition *condition = NULL; | |
853 | ||
854 | condition = lttng_trigger_get_condition(trigger); | |
855 | if (!condition) { | |
856 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
857 | goto end; | |
858 | } | |
859 | ||
860 | switch (lttng_condition_get_type(condition)) { | |
8dbb86b8 | 861 | case LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES: |
58daac01 JR |
862 | { |
863 | struct lttng_event_rule *event_rule; | |
864 | const enum lttng_condition_status condition_status = | |
8dbb86b8 JR |
865 | lttng_condition_event_rule_matches_borrow_rule_mutable( |
866 | condition, &event_rule); | |
58daac01 | 867 | |
a0377dfe | 868 | LTTNG_ASSERT(condition_status == LTTNG_CONDITION_STATUS_OK); |
f2e97f59 JR |
869 | |
870 | /* Generate the filter bytecode. */ | |
58daac01 JR |
871 | ret = lttng_event_rule_generate_filter_bytecode( |
872 | event_rule, creds); | |
873 | if (ret != LTTNG_OK) { | |
874 | goto end; | |
875 | } | |
876 | ||
f2e97f59 | 877 | /* Generate the capture bytecode. */ |
8dbb86b8 | 878 | ret = lttng_condition_event_rule_matches_generate_capture_descriptor_bytecode( |
f2e97f59 JR |
879 | condition); |
880 | if (ret != LTTNG_OK) { | |
881 | goto end; | |
882 | } | |
883 | ||
58daac01 JR |
884 | ret = LTTNG_OK; |
885 | break; | |
886 | } | |
887 | default: | |
888 | ret = LTTNG_OK; | |
889 | break; | |
890 | } | |
891 | end: | |
892 | return ret; | |
893 | } | |
b61776fb | 894 | |
b61776fb SM |
895 | struct lttng_trigger *lttng_trigger_copy(const struct lttng_trigger *trigger) |
896 | { | |
897 | int ret; | |
898 | struct lttng_payload copy_buffer; | |
94dbd8e4 JG |
899 | struct lttng_condition *condition_copy = NULL; |
900 | struct lttng_action *action_copy = NULL; | |
b61776fb | 901 | struct lttng_trigger *copy = NULL; |
94dbd8e4 JG |
902 | enum lttng_trigger_status trigger_status; |
903 | const char *trigger_name; | |
904 | uid_t trigger_owner_uid; | |
b61776fb SM |
905 | |
906 | lttng_payload_init(©_buffer); | |
907 | ||
94dbd8e4 | 908 | ret = lttng_condition_serialize(trigger->condition, ©_buffer); |
b61776fb SM |
909 | if (ret < 0) { |
910 | goto end; | |
911 | } | |
912 | ||
913 | { | |
914 | struct lttng_payload_view view = | |
915 | lttng_payload_view_from_payload( | |
916 | ©_buffer, 0, -1); | |
94dbd8e4 JG |
917 | |
918 | ret = lttng_condition_create_from_payload( | |
919 | &view, &condition_copy); | |
920 | if (ret < 0) { | |
921 | goto end; | |
922 | } | |
923 | } | |
924 | ||
925 | lttng_payload_clear(©_buffer); | |
926 | ||
927 | ret = lttng_action_serialize(trigger->action, ©_buffer); | |
928 | if (ret < 0) { | |
929 | goto end; | |
930 | } | |
931 | ||
932 | { | |
933 | struct lttng_payload_view view = | |
934 | lttng_payload_view_from_payload( | |
935 | ©_buffer, 0, -1); | |
936 | ||
937 | ret = lttng_action_create_from_payload( | |
938 | &view, &action_copy); | |
b61776fb | 939 | if (ret < 0) { |
b61776fb SM |
940 | goto end; |
941 | } | |
942 | } | |
943 | ||
94dbd8e4 JG |
944 | copy = lttng_trigger_create(condition_copy, action_copy); |
945 | if (!copy) { | |
946 | ERR("Failed to allocate trigger during trigger copy"); | |
947 | goto end; | |
948 | } | |
949 | ||
950 | trigger_status = lttng_trigger_get_name(trigger, &trigger_name); | |
951 | switch (trigger_status) { | |
952 | case LTTNG_TRIGGER_STATUS_OK: | |
953 | trigger_status = lttng_trigger_set_name(copy, trigger_name); | |
954 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
955 | ERR("Failed to set name of new trigger during copy"); | |
956 | goto error_cleanup_trigger; | |
957 | } | |
958 | break; | |
959 | case LTTNG_TRIGGER_STATUS_UNSET: | |
960 | break; | |
961 | default: | |
962 | ERR("Failed to get name of original trigger during copy"); | |
963 | goto error_cleanup_trigger; | |
964 | } | |
965 | ||
966 | trigger_status = lttng_trigger_get_owner_uid( | |
967 | trigger, &trigger_owner_uid); | |
968 | switch (trigger_status) { | |
969 | case LTTNG_TRIGGER_STATUS_OK: | |
970 | LTTNG_OPTIONAL_SET(©->creds.uid, trigger_owner_uid); | |
971 | break; | |
972 | case LTTNG_TRIGGER_STATUS_UNSET: | |
973 | break; | |
974 | default: | |
975 | ERR("Failed to get owner uid of original trigger during copy"); | |
976 | goto error_cleanup_trigger; | |
977 | } | |
978 | ||
979 | copy->tracer_token = trigger->tracer_token; | |
980 | copy->registered = trigger->registered; | |
f2bda80e | 981 | copy->is_hidden = trigger->is_hidden; |
94dbd8e4 JG |
982 | goto end; |
983 | ||
984 | error_cleanup_trigger: | |
985 | lttng_trigger_destroy(copy); | |
986 | copy = NULL; | |
b61776fb | 987 | end: |
94dbd8e4 JG |
988 | lttng_condition_put(condition_copy); |
989 | lttng_action_put(action_copy); | |
b61776fb SM |
990 | lttng_payload_reset(©_buffer); |
991 | return copy; | |
992 | } | |
c738df17 | 993 | |
c738df17 FD |
994 | bool lttng_trigger_needs_tracer_notifier(const struct lttng_trigger *trigger) |
995 | { | |
996 | bool needs_tracer_notifier = false; | |
997 | const struct lttng_condition *condition = | |
998 | lttng_trigger_get_const_condition(trigger); | |
999 | ||
1000 | switch (lttng_condition_get_type(condition)) { | |
8dbb86b8 | 1001 | case LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES: |
c738df17 FD |
1002 | needs_tracer_notifier = true; |
1003 | goto end; | |
1004 | case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE: | |
1005 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH: | |
1006 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW: | |
1007 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING: | |
1008 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED: | |
1009 | goto end; | |
1010 | case LTTNG_CONDITION_TYPE_UNKNOWN: | |
1011 | default: | |
1012 | abort(); | |
1013 | } | |
1014 | end: | |
1015 | return needs_tracer_notifier; | |
1016 | } | |
9c374932 | 1017 | |
9c374932 JR |
1018 | void lttng_trigger_set_as_registered(struct lttng_trigger *trigger) |
1019 | { | |
1020 | pthread_mutex_lock(&trigger->lock); | |
1021 | trigger->registered = true; | |
1022 | pthread_mutex_unlock(&trigger->lock); | |
1023 | } | |
1024 | ||
9c374932 JR |
1025 | void lttng_trigger_set_as_unregistered(struct lttng_trigger *trigger) |
1026 | { | |
1027 | pthread_mutex_lock(&trigger->lock); | |
1028 | trigger->registered = false; | |
1029 | pthread_mutex_unlock(&trigger->lock); | |
1030 | } | |
1031 | ||
1032 | /* | |
1033 | * The trigger must be locked before calling lttng_trigger_registered. | |
1034 | * The lock is necessary since a trigger can be unregistered at anytime. | |
1035 | * Manipulations requiring that the trigger be registered must always acquire | |
1036 | * the trigger lock for the duration of the manipulation using | |
1037 | * `lttng_trigger_lock` and `lttng_trigger_unlock`. | |
1038 | */ | |
9c374932 JR |
1039 | bool lttng_trigger_is_registered(struct lttng_trigger *trigger) |
1040 | { | |
1041 | ASSERT_LOCKED(trigger->lock); | |
1042 | return trigger->registered; | |
1043 | } | |
1044 | ||
9c374932 JR |
1045 | void lttng_trigger_lock(struct lttng_trigger *trigger) |
1046 | { | |
1047 | pthread_mutex_lock(&trigger->lock); | |
1048 | } | |
1049 | ||
9c374932 JR |
1050 | void lttng_trigger_unlock(struct lttng_trigger *trigger) |
1051 | { | |
1052 | pthread_mutex_unlock(&trigger->lock); | |
1053 | } | |
6a751b95 | 1054 | |
6a751b95 JR |
1055 | enum lttng_error_code lttng_trigger_mi_serialize(const struct lttng_trigger *trigger, |
1056 | struct mi_writer *writer, | |
1057 | const struct mi_lttng_error_query_callbacks | |
1058 | *error_query_callbacks) | |
1059 | { | |
1060 | int ret; | |
1061 | enum lttng_error_code ret_code; | |
1062 | enum lttng_trigger_status trigger_status; | |
1063 | const struct lttng_condition *condition = NULL; | |
1064 | const struct lttng_action *action = NULL; | |
1065 | struct lttng_dynamic_array action_path_indexes; | |
1066 | uid_t owner_uid; | |
1067 | ||
a0377dfe FD |
1068 | LTTNG_ASSERT(trigger); |
1069 | LTTNG_ASSERT(writer); | |
6a751b95 JR |
1070 | |
1071 | lttng_dynamic_array_init(&action_path_indexes, sizeof(uint64_t), NULL); | |
1072 | ||
1073 | /* Open trigger element. */ | |
1074 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_trigger); | |
1075 | if (ret) { | |
1076 | goto mi_error; | |
1077 | } | |
1078 | ||
1079 | trigger_status = lttng_trigger_get_owner_uid(trigger, &owner_uid); | |
a0377dfe | 1080 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
6a751b95 JR |
1081 | |
1082 | /* Name. */ | |
1083 | ret = mi_lttng_writer_write_element_string( | |
1084 | writer, config_element_name, trigger->name); | |
1085 | if (ret) { | |
1086 | goto mi_error; | |
1087 | } | |
1088 | ||
1089 | /* Owner uid. */ | |
1090 | ret = mi_lttng_writer_write_element_signed_int(writer, | |
1091 | mi_lttng_element_trigger_owner_uid, | |
1092 | (int64_t) owner_uid); | |
1093 | if (ret) { | |
1094 | goto mi_error; | |
1095 | } | |
1096 | ||
1097 | /* Condition. */ | |
1098 | condition = lttng_trigger_get_const_condition(trigger); | |
a0377dfe | 1099 | LTTNG_ASSERT(condition); |
6a751b95 JR |
1100 | ret_code = lttng_condition_mi_serialize( |
1101 | trigger, condition, writer, error_query_callbacks); | |
1102 | if (ret_code != LTTNG_OK) { | |
1103 | goto end; | |
1104 | } | |
1105 | ||
1106 | /* Action. */ | |
1107 | action = lttng_trigger_get_const_action(trigger); | |
a0377dfe | 1108 | LTTNG_ASSERT(action); |
6a751b95 JR |
1109 | ret_code = lttng_action_mi_serialize(trigger, action, writer, |
1110 | error_query_callbacks, &action_path_indexes); | |
1111 | if (ret_code != LTTNG_OK) { | |
1112 | goto end; | |
1113 | } | |
1114 | ||
1115 | if (error_query_callbacks && error_query_callbacks->trigger_cb) { | |
1116 | struct lttng_error_query_results *results = NULL; | |
1117 | ||
1118 | ret_code = error_query_callbacks->trigger_cb(trigger, &results); | |
1119 | if (ret_code != LTTNG_OK) { | |
1120 | goto end; | |
1121 | } | |
1122 | ||
1123 | ret_code = lttng_error_query_results_mi_serialize( | |
1124 | results, writer); | |
1125 | lttng_error_query_results_destroy(results); | |
1126 | if (ret_code != LTTNG_OK) { | |
1127 | goto end; | |
1128 | } | |
1129 | } | |
1130 | ||
1131 | /* Close trigger element. */ | |
1132 | ret = mi_lttng_writer_close_element(writer); | |
1133 | if (ret) { | |
1134 | goto mi_error; | |
1135 | } | |
1136 | ||
1137 | ret_code = LTTNG_OK; | |
1138 | goto end; | |
1139 | ||
1140 | mi_error: | |
1141 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
1142 | end: | |
1143 | lttng_dynamic_array_reset(&action_path_indexes); | |
1144 | return ret_code; | |
1145 | } | |
1146 | ||
1147 | /* Used by qsort, which expects the semantics of strcmp(). */ | |
1148 | static int compare_triggers_by_name(const void *a, const void *b) | |
1149 | { | |
1150 | const struct lttng_trigger *trigger_a = | |
1151 | *((const struct lttng_trigger **) a); | |
1152 | const struct lttng_trigger *trigger_b = | |
1153 | *((const struct lttng_trigger **) b); | |
1154 | const char *name_a, *name_b; | |
1155 | enum lttng_trigger_status trigger_status; | |
1156 | ||
1157 | /* Anonymous triggers are not reachable here. */ | |
1158 | trigger_status = lttng_trigger_get_name(trigger_a, &name_a); | |
a0377dfe | 1159 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
6a751b95 JR |
1160 | |
1161 | trigger_status = lttng_trigger_get_name(trigger_b, &name_b); | |
a0377dfe | 1162 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
6a751b95 JR |
1163 | |
1164 | return strcmp(name_a, name_b); | |
1165 | } | |
1166 | ||
6a751b95 JR |
1167 | enum lttng_error_code lttng_triggers_mi_serialize(const struct lttng_triggers *triggers, |
1168 | struct mi_writer *writer, | |
1169 | const struct mi_lttng_error_query_callbacks | |
1170 | *error_query_callbacks) | |
1171 | { | |
1172 | int ret; | |
1173 | enum lttng_error_code ret_code; | |
1174 | enum lttng_trigger_status status; | |
1175 | unsigned int count, i; | |
1176 | struct lttng_dynamic_pointer_array sorted_triggers; | |
1177 | ||
a0377dfe FD |
1178 | LTTNG_ASSERT(triggers); |
1179 | LTTNG_ASSERT(writer); | |
6a751b95 JR |
1180 | |
1181 | /* | |
1182 | * Sort trigger by name to ensure an order at the MI level and ignore | |
1183 | * any anonymous trigger present. | |
1184 | */ | |
1185 | lttng_dynamic_pointer_array_init(&sorted_triggers, NULL); | |
1186 | ||
1187 | status = lttng_triggers_get_count(triggers, &count); | |
a0377dfe | 1188 | LTTNG_ASSERT(status == LTTNG_TRIGGER_STATUS_OK); |
6a751b95 JR |
1189 | |
1190 | for (i = 0; i < count; i++) { | |
1191 | int add_ret; | |
1192 | const char *unused_name; | |
1193 | const struct lttng_trigger *trigger = | |
1194 | lttng_triggers_get_at_index(triggers, i); | |
1195 | ||
1196 | status = lttng_trigger_get_name(trigger, &unused_name); | |
1197 | switch (status) { | |
1198 | case LTTNG_TRIGGER_STATUS_OK: | |
1199 | break; | |
1200 | case LTTNG_TRIGGER_STATUS_UNSET: | |
1201 | /* Don't list anonymous triggers. */ | |
1202 | continue; | |
1203 | default: | |
1204 | abort(); | |
1205 | } | |
1206 | ||
1207 | add_ret = lttng_dynamic_pointer_array_add_pointer( | |
1208 | &sorted_triggers, (void *) trigger); | |
1209 | ||
1210 | if (add_ret) { | |
1211 | ERR("Failed to lttng_trigger to sorting array."); | |
1212 | ret_code = LTTNG_ERR_NOMEM; | |
1213 | goto error; | |
1214 | } | |
1215 | } | |
1216 | ||
1217 | qsort(sorted_triggers.array.buffer.data, count, | |
1218 | sizeof(struct lttng_trigger *), | |
1219 | compare_triggers_by_name); | |
1220 | ||
1221 | /* Open triggers element. */ | |
1222 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_triggers); | |
1223 | if (ret) { | |
1224 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
1225 | goto error; | |
1226 | } | |
1227 | ||
1228 | for (i = 0; i < lttng_dynamic_pointer_array_get_count(&sorted_triggers); i++) { | |
1229 | const struct lttng_trigger *trigger = | |
1230 | (const struct lttng_trigger *) | |
1231 | lttng_dynamic_pointer_array_get_pointer( | |
1232 | &sorted_triggers, i); | |
1233 | ||
1234 | lttng_trigger_mi_serialize(trigger, writer, error_query_callbacks); | |
1235 | } | |
1236 | ||
1237 | /* Close triggers element. */ | |
1238 | ret = mi_lttng_writer_close_element(writer); | |
1239 | if (ret) { | |
1240 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
1241 | goto error; | |
1242 | } | |
1243 | ||
1244 | ret_code = LTTNG_OK; | |
1245 | ||
1246 | error: | |
1247 | lttng_dynamic_pointer_array_reset(&sorted_triggers); | |
1248 | return ret_code; | |
1249 | } |