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 | ||
8 | #include <lttng/trigger/trigger-internal.h> | |
9 | #include <lttng/condition/condition-internal.h> | |
10 | #include <lttng/action/action-internal.h> | |
3da864a9 | 11 | #include <common/credentials.h> |
9e620ea7 JG |
12 | #include <common/payload.h> |
13 | #include <common/payload-view.h> | |
a58c490f | 14 | #include <common/error.h> |
a02903c0 | 15 | #include <common/dynamic-array.h> |
3da864a9 | 16 | #include <common/optional.h> |
a58c490f | 17 | #include <assert.h> |
242388e4 | 18 | #include <inttypes.h> |
a58c490f JG |
19 | |
20 | LTTNG_HIDDEN | |
21 | bool lttng_trigger_validate(struct lttng_trigger *trigger) | |
22 | { | |
23 | bool valid; | |
24 | ||
25 | if (!trigger) { | |
26 | valid = false; | |
27 | goto end; | |
28 | } | |
29 | ||
64eafdf6 JR |
30 | if (!trigger->creds.uid.is_set) { |
31 | valid = false; | |
32 | goto end; | |
33 | } | |
34 | ||
a58c490f JG |
35 | valid = lttng_condition_validate(trigger->condition) && |
36 | lttng_action_validate(trigger->action); | |
37 | end: | |
38 | return valid; | |
39 | } | |
40 | ||
41 | struct lttng_trigger *lttng_trigger_create( | |
42 | struct lttng_condition *condition, | |
43 | struct lttng_action *action) | |
44 | { | |
45 | struct lttng_trigger *trigger = NULL; | |
46 | ||
47 | if (!condition || !action) { | |
48 | goto end; | |
49 | } | |
50 | ||
51 | trigger = zmalloc(sizeof(struct lttng_trigger)); | |
52 | if (!trigger) { | |
53 | goto end; | |
54 | } | |
55 | ||
f01d28b4 JR |
56 | urcu_ref_init(&trigger->ref); |
57 | ||
7ca172c1 | 58 | lttng_condition_get(condition); |
a58c490f | 59 | trigger->condition = condition; |
7ca172c1 JR |
60 | |
61 | lttng_action_get(action); | |
a58c490f | 62 | trigger->action = action; |
3da864a9 | 63 | |
a58c490f JG |
64 | end: |
65 | return trigger; | |
66 | } | |
67 | ||
7ca172c1 JR |
68 | /* |
69 | * Note: the lack of reference counting 'get' on the condition object is normal. | |
70 | * This API was exposed as such in 2.11. The client is not expected to call | |
71 | * lttng_condition_destroy on the returned object. | |
72 | */ | |
a58c490f JG |
73 | struct lttng_condition *lttng_trigger_get_condition( |
74 | struct lttng_trigger *trigger) | |
75 | { | |
76 | return trigger ? trigger->condition : NULL; | |
77 | } | |
78 | ||
9b63a4aa JG |
79 | LTTNG_HIDDEN |
80 | const struct lttng_condition *lttng_trigger_get_const_condition( | |
81 | const struct lttng_trigger *trigger) | |
82 | { | |
83 | return trigger->condition; | |
84 | } | |
85 | ||
7ca172c1 JR |
86 | |
87 | /* | |
88 | * Note: the lack of reference counting 'get' on the action object is normal. | |
89 | * This API was exposed as such in 2.11. The client is not expected to call | |
90 | * lttng_action_destroy on the returned object. | |
91 | */ | |
e2ba1c78 | 92 | struct lttng_action *lttng_trigger_get_action( |
a58c490f JG |
93 | struct lttng_trigger *trigger) |
94 | { | |
95 | return trigger ? trigger->action : NULL; | |
96 | } | |
97 | ||
9b63a4aa JG |
98 | LTTNG_HIDDEN |
99 | const struct lttng_action *lttng_trigger_get_const_action( | |
100 | const struct lttng_trigger *trigger) | |
101 | { | |
102 | return trigger->action; | |
103 | } | |
104 | ||
f01d28b4 | 105 | static void trigger_destroy_ref(struct urcu_ref *ref) |
a58c490f | 106 | { |
f01d28b4 JR |
107 | struct lttng_trigger *trigger = |
108 | container_of(ref, struct lttng_trigger, ref); | |
7ca172c1 JR |
109 | struct lttng_action *action = lttng_trigger_get_action(trigger); |
110 | struct lttng_condition *condition = | |
111 | lttng_trigger_get_condition(trigger); | |
112 | ||
7ca172c1 JR |
113 | assert(action); |
114 | assert(condition); | |
115 | ||
116 | /* Release ownership. */ | |
117 | lttng_action_put(action); | |
118 | lttng_condition_put(condition); | |
119 | ||
242388e4 | 120 | free(trigger->name); |
a58c490f JG |
121 | free(trigger); |
122 | } | |
123 | ||
f01d28b4 JR |
124 | void lttng_trigger_destroy(struct lttng_trigger *trigger) |
125 | { | |
126 | lttng_trigger_put(trigger); | |
127 | } | |
128 | ||
a58c490f | 129 | LTTNG_HIDDEN |
c0a66c84 JG |
130 | ssize_t lttng_trigger_create_from_payload( |
131 | struct lttng_payload_view *src_view, | |
a58c490f JG |
132 | struct lttng_trigger **trigger) |
133 | { | |
242388e4 | 134 | ssize_t ret, offset = 0, condition_size, action_size, name_size = 0; |
a58c490f JG |
135 | struct lttng_condition *condition = NULL; |
136 | struct lttng_action *action = NULL; | |
137 | const struct lttng_trigger_comm *trigger_comm; | |
242388e4 | 138 | const char *name = NULL; |
64eafdf6 JR |
139 | struct lttng_credentials creds = { |
140 | .uid = LTTNG_OPTIONAL_INIT_UNSET, | |
141 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
142 | }; | |
3e6e0df2 JG |
143 | const struct lttng_payload_view trigger_comm_view = |
144 | lttng_payload_view_from_view( | |
145 | src_view, 0, sizeof(*trigger_comm)); | |
a58c490f JG |
146 | |
147 | if (!src_view || !trigger) { | |
148 | ret = -1; | |
149 | goto end; | |
150 | } | |
151 | ||
3e6e0df2 JG |
152 | if (!lttng_payload_view_is_valid(&trigger_comm_view)) { |
153 | /* Payload not large enough to contain the header. */ | |
154 | ret = -1; | |
155 | goto end; | |
156 | } | |
157 | ||
a58c490f | 158 | /* lttng_trigger_comm header */ |
3e6e0df2 | 159 | trigger_comm = (typeof(trigger_comm)) trigger_comm_view.buffer.data; |
64eafdf6 JR |
160 | |
161 | /* Set the trigger's creds. */ | |
162 | if (trigger_comm->uid > (uint64_t) ((uid_t) -1)) { | |
163 | /* UID out of range for this platform. */ | |
164 | ret = -1; | |
165 | goto end; | |
166 | } | |
167 | ||
168 | LTTNG_OPTIONAL_SET(&creds.uid, trigger_comm->uid); | |
169 | ||
a58c490f | 170 | offset += sizeof(*trigger_comm); |
242388e4 JR |
171 | |
172 | if (trigger_comm->name_length != 0) { | |
173 | /* Name. */ | |
174 | const struct lttng_payload_view name_view = | |
175 | lttng_payload_view_from_view( | |
3e6e0df2 JG |
176 | src_view, offset, |
177 | trigger_comm->name_length); | |
178 | ||
179 | if (!lttng_payload_view_is_valid(&name_view)) { | |
180 | ret = -1; | |
181 | goto end; | |
182 | } | |
242388e4 JR |
183 | |
184 | name = name_view.buffer.data; | |
185 | if (!lttng_buffer_view_contains_string(&name_view.buffer, name, | |
186 | trigger_comm->name_length)) { | |
187 | ret = -1; | |
188 | goto end; | |
189 | } | |
190 | ||
191 | offset += trigger_comm->name_length; | |
192 | name_size = trigger_comm->name_length; | |
193 | } | |
194 | ||
c0a66c84 JG |
195 | { |
196 | /* struct lttng_condition */ | |
197 | struct lttng_payload_view condition_view = | |
198 | lttng_payload_view_from_view( | |
199 | src_view, offset, -1); | |
200 | ||
201 | condition_size = lttng_condition_create_from_payload(&condition_view, | |
202 | &condition); | |
203 | } | |
a58c490f | 204 | |
a58c490f JG |
205 | if (condition_size < 0) { |
206 | ret = condition_size; | |
207 | goto end; | |
208 | } | |
c0a66c84 | 209 | |
a58c490f | 210 | offset += condition_size; |
c0a66c84 JG |
211 | { |
212 | /* struct lttng_action */ | |
213 | struct lttng_payload_view action_view = | |
214 | lttng_payload_view_from_view( | |
215 | src_view, offset, -1); | |
216 | ||
217 | action_size = lttng_action_create_from_payload(&action_view, &action); | |
218 | } | |
a58c490f | 219 | |
a58c490f JG |
220 | if (action_size < 0) { |
221 | ret = action_size; | |
222 | goto end; | |
223 | } | |
224 | offset += action_size; | |
225 | ||
226 | /* Unexpected size of inner-elements; the buffer is corrupted. */ | |
242388e4 | 227 | if ((ssize_t) trigger_comm->length != condition_size + action_size + name_size) { |
a58c490f JG |
228 | ret = -1; |
229 | goto error; | |
230 | } | |
231 | ||
232 | *trigger = lttng_trigger_create(condition, action); | |
233 | if (!*trigger) { | |
234 | ret = -1; | |
235 | goto error; | |
236 | } | |
c0a66c84 | 237 | |
64eafdf6 JR |
238 | lttng_trigger_set_credentials(*trigger, &creds); |
239 | ||
7ca172c1 JR |
240 | /* |
241 | * The trigger object owns references to the action and condition | |
242 | * objects. | |
243 | */ | |
244 | lttng_condition_put(condition); | |
245 | condition = NULL; | |
246 | ||
247 | lttng_action_put(action); | |
248 | action = NULL; | |
249 | ||
242388e4 JR |
250 | if (name) { |
251 | const enum lttng_trigger_status status = | |
252 | lttng_trigger_set_name(*trigger, name); | |
253 | ||
254 | if (status != LTTNG_TRIGGER_STATUS_OK) { | |
255 | ret = -1; | |
256 | goto end; | |
257 | } | |
258 | } | |
259 | ||
a58c490f | 260 | ret = offset; |
7ca172c1 | 261 | |
a58c490f | 262 | error: |
1065801b JG |
263 | lttng_condition_put(condition); |
264 | lttng_action_put(action); | |
7ca172c1 | 265 | end: |
a58c490f JG |
266 | return ret; |
267 | } | |
268 | ||
269 | /* | |
a58c490f JG |
270 | * Both elements are stored contiguously, see their "*_comm" structure |
271 | * for the detailed format. | |
272 | */ | |
273 | LTTNG_HIDDEN | |
a02903c0 | 274 | int lttng_trigger_serialize(const struct lttng_trigger *trigger, |
c0a66c84 | 275 | struct lttng_payload *payload) |
a58c490f | 276 | { |
3647288f | 277 | int ret; |
242388e4 | 278 | size_t header_offset, size_before_payload, size_name; |
c0a66c84 | 279 | struct lttng_trigger_comm trigger_comm = {}; |
3647288f | 280 | struct lttng_trigger_comm *header; |
64eafdf6 JR |
281 | const struct lttng_credentials *creds = NULL; |
282 | ||
283 | creds = lttng_trigger_get_credentials(trigger); | |
284 | assert(creds); | |
285 | ||
286 | trigger_comm.uid = LTTNG_OPTIONAL_GET(creds->uid); | |
a58c490f | 287 | |
242388e4 JR |
288 | if (trigger->name != NULL) { |
289 | size_name = strlen(trigger->name) + 1; | |
290 | } else { | |
291 | size_name = 0; | |
292 | } | |
293 | ||
294 | trigger_comm.name_length = size_name; | |
295 | ||
c0a66c84 JG |
296 | header_offset = payload->buffer.size; |
297 | ret = lttng_dynamic_buffer_append(&payload->buffer, &trigger_comm, | |
3647288f JG |
298 | sizeof(trigger_comm)); |
299 | if (ret) { | |
a58c490f JG |
300 | goto end; |
301 | } | |
302 | ||
c0a66c84 | 303 | size_before_payload = payload->buffer.size; |
242388e4 JR |
304 | |
305 | /* Trigger name. */ | |
306 | ret = lttng_dynamic_buffer_append( | |
307 | &payload->buffer, trigger->name, size_name); | |
308 | if (ret) { | |
309 | goto end; | |
310 | } | |
311 | ||
c0a66c84 | 312 | ret = lttng_condition_serialize(trigger->condition, payload); |
3647288f | 313 | if (ret) { |
a58c490f JG |
314 | goto end; |
315 | } | |
a58c490f | 316 | |
c0a66c84 | 317 | ret = lttng_action_serialize(trigger->action, payload); |
3647288f | 318 | if (ret) { |
a58c490f JG |
319 | goto end; |
320 | } | |
a58c490f | 321 | |
3647288f | 322 | /* Update payload size. */ |
c0a66c84 JG |
323 | header = (typeof(header)) (payload->buffer.data + header_offset); |
324 | header->length = payload->buffer.size - size_before_payload; | |
a58c490f JG |
325 | end: |
326 | return ret; | |
327 | } | |
3da864a9 | 328 | |
85c06c44 JR |
329 | LTTNG_HIDDEN |
330 | bool lttng_trigger_is_equal( | |
331 | const struct lttng_trigger *a, const struct lttng_trigger *b) | |
332 | { | |
333 | /* | |
334 | * Name is not taken into account since it is cosmetic only. | |
335 | */ | |
336 | if (!lttng_condition_is_equal(a->condition, b->condition)) { | |
337 | return false; | |
338 | } | |
339 | ||
340 | if (!lttng_action_is_equal(a->action, b->action)) { | |
341 | return false; | |
342 | } | |
343 | ||
344 | if (!lttng_credentials_is_equal(lttng_trigger_get_credentials(a), | |
345 | lttng_trigger_get_credentials(b))) { | |
346 | return false; | |
347 | } | |
348 | ||
349 | return true; | |
350 | } | |
351 | ||
242388e4 JR |
352 | enum lttng_trigger_status lttng_trigger_set_name(struct lttng_trigger *trigger, |
353 | const char* name) | |
354 | { | |
355 | char *name_copy = NULL; | |
356 | enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK; | |
357 | ||
358 | if (!trigger || !name || | |
359 | strlen(name) == 0) { | |
360 | status = LTTNG_TRIGGER_STATUS_INVALID; | |
361 | goto end; | |
362 | } | |
363 | ||
364 | name_copy = strdup(name); | |
365 | if (!name_copy) { | |
366 | status = LTTNG_TRIGGER_STATUS_ERROR; | |
367 | goto end; | |
368 | } | |
369 | ||
370 | free(trigger->name); | |
371 | ||
372 | trigger->name = name_copy; | |
373 | name_copy = NULL; | |
374 | end: | |
375 | return status; | |
376 | } | |
377 | ||
378 | enum lttng_trigger_status lttng_trigger_get_name( | |
379 | const struct lttng_trigger *trigger, const char **name) | |
380 | { | |
381 | enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK; | |
382 | ||
383 | if (!trigger || !name) { | |
384 | status = LTTNG_TRIGGER_STATUS_INVALID; | |
385 | goto end; | |
386 | } | |
387 | ||
388 | if (!trigger->name) { | |
389 | status = LTTNG_TRIGGER_STATUS_UNSET; | |
390 | } | |
391 | ||
392 | *name = trigger->name; | |
393 | end: | |
394 | return status; | |
395 | } | |
396 | ||
397 | LTTNG_HIDDEN | |
398 | int lttng_trigger_assign_name(struct lttng_trigger *dst, | |
399 | const struct lttng_trigger *src) | |
400 | { | |
401 | int ret = 0; | |
402 | enum lttng_trigger_status status; | |
403 | ||
404 | status = lttng_trigger_set_name(dst, src->name); | |
405 | if (status != LTTNG_TRIGGER_STATUS_OK) { | |
406 | ret = -1; | |
407 | ERR("Failed to set name for trigger"); | |
408 | goto end; | |
409 | } | |
410 | end: | |
411 | return ret; | |
412 | } | |
413 | ||
e6887944 JR |
414 | LTTNG_HIDDEN |
415 | void lttng_trigger_set_tracer_token(struct lttng_trigger *trigger, | |
416 | uint64_t token) | |
417 | { | |
418 | assert(trigger); | |
419 | LTTNG_OPTIONAL_SET(&trigger->tracer_token, token); | |
420 | } | |
421 | ||
422 | LTTNG_HIDDEN | |
423 | uint64_t lttng_trigger_get_tracer_token(const struct lttng_trigger *trigger) | |
424 | { | |
425 | assert(trigger); | |
426 | ||
427 | return LTTNG_OPTIONAL_GET(trigger->tracer_token); | |
428 | } | |
429 | ||
242388e4 JR |
430 | LTTNG_HIDDEN |
431 | int lttng_trigger_generate_name(struct lttng_trigger *trigger, | |
432 | uint64_t unique_id) | |
433 | { | |
434 | int ret = 0; | |
435 | char *generated_name = NULL; | |
436 | ||
437 | ret = asprintf(&generated_name, "T%" PRIu64 "", unique_id); | |
438 | if (ret < 0) { | |
439 | ERR("Failed to generate trigger name"); | |
440 | ret = -1; | |
441 | goto end; | |
442 | } | |
443 | ||
444 | ret = 0; | |
445 | free(trigger->name); | |
446 | trigger->name = generated_name; | |
447 | end: | |
448 | return ret; | |
449 | } | |
450 | ||
f01d28b4 JR |
451 | LTTNG_HIDDEN |
452 | void lttng_trigger_get(struct lttng_trigger *trigger) | |
453 | { | |
454 | urcu_ref_get(&trigger->ref); | |
455 | } | |
456 | ||
457 | LTTNG_HIDDEN | |
458 | void lttng_trigger_put(struct lttng_trigger *trigger) | |
459 | { | |
460 | if (!trigger) { | |
461 | return; | |
462 | } | |
463 | ||
464 | urcu_ref_put(&trigger->ref , trigger_destroy_ref); | |
465 | } | |
466 | ||
a02903c0 JR |
467 | static void delete_trigger_array_element(void *ptr) |
468 | { | |
469 | struct lttng_trigger *trigger = ptr; | |
470 | ||
471 | lttng_trigger_put(trigger); | |
472 | } | |
473 | ||
474 | LTTNG_HIDDEN | |
475 | struct lttng_triggers *lttng_triggers_create(void) | |
476 | { | |
477 | struct lttng_triggers *triggers = NULL; | |
478 | ||
479 | triggers = zmalloc(sizeof(*triggers)); | |
480 | if (!triggers) { | |
481 | goto end; | |
482 | } | |
483 | ||
484 | lttng_dynamic_pointer_array_init(&triggers->array, delete_trigger_array_element); | |
485 | ||
486 | end: | |
487 | return triggers; | |
488 | } | |
489 | ||
490 | LTTNG_HIDDEN | |
491 | struct lttng_trigger *lttng_triggers_borrow_mutable_at_index( | |
492 | const struct lttng_triggers *triggers, unsigned int index) | |
493 | { | |
494 | struct lttng_trigger *trigger = NULL; | |
495 | ||
496 | assert(triggers); | |
497 | if (index >= lttng_dynamic_pointer_array_get_count(&triggers->array)) { | |
498 | goto end; | |
499 | } | |
500 | ||
501 | trigger = (struct lttng_trigger *) | |
502 | lttng_dynamic_pointer_array_get_pointer( | |
503 | &triggers->array, index); | |
504 | end: | |
505 | return trigger; | |
506 | } | |
507 | ||
508 | LTTNG_HIDDEN | |
509 | int lttng_triggers_add( | |
510 | struct lttng_triggers *triggers, struct lttng_trigger *trigger) | |
511 | { | |
512 | int ret; | |
513 | ||
514 | assert(triggers); | |
515 | assert(trigger); | |
516 | ||
517 | lttng_trigger_get(trigger); | |
518 | ||
519 | ret = lttng_dynamic_pointer_array_add_pointer(&triggers->array, trigger); | |
520 | if (ret) { | |
521 | lttng_trigger_put(trigger); | |
522 | } | |
523 | ||
524 | return ret; | |
525 | } | |
526 | ||
527 | const struct lttng_trigger *lttng_triggers_get_at_index( | |
528 | const struct lttng_triggers *triggers, unsigned int index) | |
529 | { | |
530 | return lttng_triggers_borrow_mutable_at_index(triggers, index); | |
531 | } | |
532 | ||
533 | enum lttng_trigger_status lttng_triggers_get_count(const struct lttng_triggers *triggers, unsigned int *count) | |
534 | { | |
535 | enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK; | |
536 | ||
537 | if (!triggers || !count) { | |
538 | status = LTTNG_TRIGGER_STATUS_INVALID; | |
539 | goto end; | |
540 | } | |
541 | ||
542 | *count = lttng_dynamic_pointer_array_get_count(&triggers->array); | |
543 | end: | |
544 | return status; | |
545 | } | |
546 | ||
547 | void lttng_triggers_destroy(struct lttng_triggers *triggers) | |
548 | { | |
549 | if (!triggers) { | |
550 | return; | |
551 | } | |
552 | ||
553 | lttng_dynamic_pointer_array_reset(&triggers->array); | |
554 | free(triggers); | |
555 | } | |
556 | ||
557 | int lttng_triggers_serialize(const struct lttng_triggers *triggers, | |
558 | struct lttng_payload *payload) | |
559 | { | |
560 | int ret; | |
561 | unsigned int i, count; | |
562 | size_t size_before_payload; | |
563 | struct lttng_triggers_comm triggers_comm = {}; | |
564 | struct lttng_triggers_comm *header; | |
565 | enum lttng_trigger_status status; | |
566 | const size_t header_offset = payload->buffer.size; | |
567 | ||
568 | status = lttng_triggers_get_count(triggers, &count); | |
569 | if (status != LTTNG_TRIGGER_STATUS_OK) { | |
570 | ret = LTTNG_ERR_INVALID; | |
571 | goto end; | |
572 | } | |
573 | ||
574 | triggers_comm.count = count; | |
575 | ||
576 | /* Placeholder header; updated at the end. */ | |
577 | ret = lttng_dynamic_buffer_append(&payload->buffer, &triggers_comm, | |
578 | sizeof(triggers_comm)); | |
579 | if (ret) { | |
580 | goto end; | |
581 | } | |
582 | ||
583 | size_before_payload = payload->buffer.size; | |
584 | ||
585 | for (i = 0; i < count; i++) { | |
586 | const struct lttng_trigger *trigger = | |
587 | lttng_triggers_get_at_index(triggers, i); | |
588 | ||
589 | assert(trigger); | |
590 | ||
591 | ret = lttng_trigger_serialize(trigger, payload); | |
592 | if (ret) { | |
593 | goto end; | |
594 | } | |
595 | } | |
596 | ||
597 | /* Update payload size. */ | |
598 | header = (struct lttng_triggers_comm *) ((char *) payload->buffer.data + header_offset); | |
599 | header->length = payload->buffer.size - size_before_payload; | |
600 | end: | |
601 | return ret; | |
602 | } | |
603 | ||
604 | LTTNG_HIDDEN | |
605 | ssize_t lttng_triggers_create_from_payload( | |
606 | struct lttng_payload_view *src_view, | |
607 | struct lttng_triggers **triggers) | |
608 | { | |
609 | ssize_t ret, offset = 0, triggers_size = 0; | |
610 | unsigned int i; | |
611 | const struct lttng_triggers_comm *triggers_comm; | |
612 | struct lttng_triggers *local_triggers = NULL; | |
613 | ||
614 | if (!src_view || !triggers) { | |
615 | ret = -1; | |
616 | goto error; | |
617 | } | |
618 | ||
619 | /* lttng_trigger_comms header */ | |
620 | triggers_comm = (const struct lttng_triggers_comm *) src_view->buffer.data; | |
621 | offset += sizeof(*triggers_comm); | |
622 | ||
623 | local_triggers = lttng_triggers_create(); | |
624 | if (!local_triggers) { | |
625 | ret = -1; | |
626 | goto error; | |
627 | } | |
628 | ||
629 | for (i = 0; i < triggers_comm->count; i++) { | |
630 | struct lttng_trigger *trigger = NULL; | |
631 | struct lttng_payload_view trigger_view = | |
632 | lttng_payload_view_from_view(src_view, offset, -1); | |
633 | ssize_t trigger_size; | |
634 | ||
635 | trigger_size = lttng_trigger_create_from_payload( | |
636 | &trigger_view, &trigger); | |
637 | if (trigger_size < 0) { | |
638 | ret = trigger_size; | |
639 | goto error; | |
640 | } | |
641 | ||
642 | /* Transfer ownership of the trigger to the collection. */ | |
643 | ret = lttng_triggers_add(local_triggers, trigger); | |
644 | lttng_trigger_put(trigger); | |
645 | if (ret < 0) { | |
646 | ret = -1; | |
647 | goto error; | |
648 | } | |
649 | ||
650 | offset += trigger_size; | |
651 | triggers_size += trigger_size; | |
652 | } | |
653 | ||
654 | /* Unexpected size of inner-elements; the buffer is corrupted. */ | |
655 | if ((ssize_t) triggers_comm->length != triggers_size) { | |
656 | ret = -1; | |
657 | goto error; | |
658 | } | |
659 | ||
660 | /* Pass ownership to caller. */ | |
661 | *triggers = local_triggers; | |
662 | local_triggers = NULL; | |
663 | ||
664 | ret = offset; | |
665 | error: | |
666 | ||
667 | lttng_triggers_destroy(local_triggers); | |
668 | return ret; | |
669 | } | |
670 | ||
3da864a9 JR |
671 | LTTNG_HIDDEN |
672 | const struct lttng_credentials *lttng_trigger_get_credentials( | |
673 | const struct lttng_trigger *trigger) | |
674 | { | |
64eafdf6 | 675 | return &trigger->creds; |
3da864a9 JR |
676 | } |
677 | ||
678 | LTTNG_HIDDEN | |
64eafdf6 | 679 | void lttng_trigger_set_credentials(struct lttng_trigger *trigger, |
3da864a9 JR |
680 | const struct lttng_credentials *creds) |
681 | { | |
682 | assert(creds); | |
64eafdf6 JR |
683 | trigger->creds = *creds; |
684 | } | |
685 | ||
686 | enum lttng_trigger_status lttng_trigger_set_owner_uid( | |
687 | struct lttng_trigger *trigger, uid_t uid) | |
688 | { | |
689 | enum lttng_trigger_status ret = LTTNG_TRIGGER_STATUS_OK; | |
690 | const struct lttng_credentials creds = { | |
691 | .uid = LTTNG_OPTIONAL_INIT_VALUE(uid), | |
692 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
693 | }; | |
694 | ||
695 | if (!trigger) { | |
696 | ret = LTTNG_TRIGGER_STATUS_INVALID; | |
697 | goto end; | |
698 | } | |
699 | ||
700 | /* Client-side validation only to report a clearer error. */ | |
701 | if (geteuid() != 0) { | |
702 | ret = LTTNG_TRIGGER_STATUS_PERMISSION_DENIED; | |
703 | goto end; | |
704 | } | |
705 | ||
706 | lttng_trigger_set_credentials(trigger, &creds); | |
707 | ||
708 | end: | |
709 | return ret; | |
710 | } | |
711 | ||
712 | enum lttng_trigger_status lttng_trigger_get_owner_uid( | |
713 | const struct lttng_trigger *trigger, uid_t *uid) | |
714 | { | |
715 | enum lttng_trigger_status ret = LTTNG_TRIGGER_STATUS_OK; | |
716 | const struct lttng_credentials *creds = NULL; | |
717 | ||
718 | if (!trigger || !uid ) { | |
719 | ret = LTTNG_TRIGGER_STATUS_INVALID; | |
720 | goto end; | |
721 | } | |
722 | ||
723 | if (!trigger->creds.uid.is_set ) { | |
724 | ret = LTTNG_TRIGGER_STATUS_UNSET; | |
725 | goto end; | |
726 | } | |
727 | ||
728 | creds = lttng_trigger_get_credentials(trigger); | |
729 | *uid = lttng_credentials_get_uid(creds); | |
730 | ||
731 | end: | |
732 | return ret; | |
3da864a9 | 733 | } |