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b99a0cb3 JG |
1 | /* |
2 | * error-query.c | |
3 | * | |
4 | * Copyright (C) 2021 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
5 | * | |
6 | * SPDX-License-Identifier: GPL-2.1-only | |
7 | * | |
8 | */ | |
9 | ||
10 | #include <common/dynamic-array.h> | |
11 | #include <common/error.h> | |
12 | #include <common/macros.h> | |
13 | #include <common/sessiond-comm/sessiond-comm.h> | |
14 | #include <lttng/action/action-internal.h> | |
15 | #include <lttng/action/group-internal.h> | |
16 | #include <lttng/error-query-internal.h> | |
17 | #include <lttng/error-query.h> | |
18 | #include <lttng/trigger/trigger-internal.h> | |
19 | #include <stddef.h> | |
20 | ||
21 | struct lttng_error_query { | |
22 | enum lttng_error_query_target_type target_type; | |
23 | }; | |
24 | ||
25 | struct lttng_error_query_comm { | |
26 | /* enum lttng_error_query_target_type */ | |
27 | int8_t target_type; | |
28 | /* Target-specific payload. */ | |
29 | char payload[]; | |
30 | }; | |
31 | ||
32 | struct lttng_error_query_trigger { | |
33 | struct lttng_error_query parent; | |
34 | /* Mutable only because of the reference count. */ | |
35 | struct lttng_trigger *trigger; | |
36 | }; | |
37 | ||
38 | struct lttng_error_query_action_comm { | |
39 | LTTNG_OPTIONAL_COMM(uint32_t) action_index; | |
40 | /* Trigger payload. */ | |
41 | char payload[]; | |
42 | }; | |
43 | ||
44 | struct lttng_error_query_action { | |
45 | struct lttng_error_query parent; | |
46 | /* Mutable only because of the reference count. */ | |
47 | struct lttng_trigger *trigger; | |
48 | /* | |
49 | * Index of the target action. Since action lists can't be nested, | |
50 | * the targetted action is the top-level group if the action_index is | |
51 | * unset. Otherwise, the index refers to the index within the top-level | |
52 | * group. | |
53 | */ | |
54 | LTTNG_OPTIONAL(unsigned int) action_index; | |
55 | }; | |
56 | ||
57 | struct lttng_error_query_result { | |
58 | enum lttng_error_query_result_type type; | |
59 | char *name; | |
60 | char *description; | |
61 | }; | |
62 | ||
63 | struct lttng_error_query_result_comm { | |
64 | /* enum lttng_error_query_result_type */ | |
65 | uint8_t type; | |
66 | /* Length of name (including null-terminator). */ | |
67 | uint32_t name_len; | |
68 | /* Length of description (including null-terminator). */ | |
69 | uint32_t description_len; | |
70 | /* Name, description, and type-specific payload follow. */ | |
71 | char payload[]; | |
72 | } LTTNG_PACKED; | |
73 | ||
74 | struct lttng_error_query_result_counter_comm { | |
75 | uint64_t value; | |
76 | } LTTNG_PACKED; | |
77 | ||
78 | struct lttng_error_query_result_counter { | |
79 | struct lttng_error_query_result parent; | |
80 | uint64_t value; | |
81 | }; | |
82 | ||
83 | struct lttng_error_query_results_comm { | |
84 | uint32_t count; | |
85 | /* `count` instances of `struct lttng_error_query_result` follow. */ | |
86 | char payload[]; | |
87 | } LTTNG_PACKED; | |
88 | ||
89 | struct lttng_error_query_results { | |
90 | struct lttng_dynamic_pointer_array results; | |
91 | }; | |
92 | ||
93 | ||
94 | struct lttng_error_query *lttng_error_query_trigger_create( | |
95 | const struct lttng_trigger *trigger) | |
96 | { | |
97 | struct lttng_error_query_trigger *query = NULL; | |
98 | struct lttng_trigger *trigger_copy; | |
99 | ||
100 | trigger_copy = lttng_trigger_copy(trigger); | |
101 | if (!trigger_copy) { | |
102 | goto end; | |
103 | } | |
104 | ||
105 | if (!trigger) { | |
106 | goto end; | |
107 | } | |
108 | ||
109 | query = zmalloc(sizeof(*query)); | |
110 | if (!query) { | |
111 | PERROR("Failed to allocate trigger error query"); | |
112 | goto end; | |
113 | } | |
114 | ||
115 | query->parent.target_type = LTTNG_ERROR_QUERY_TARGET_TYPE_TRIGGER; | |
116 | query->trigger = trigger_copy; | |
117 | end: | |
118 | return query ? &query->parent : NULL; | |
119 | } | |
120 | ||
121 | extern struct lttng_error_query *lttng_error_query_action_create( | |
122 | const struct lttng_trigger *trigger, | |
123 | const struct lttng_action *action) | |
124 | { | |
125 | struct lttng_error_query_action *query = NULL; | |
126 | typeof(query->action_index) action_index; | |
127 | struct lttng_trigger *trigger_copy; | |
128 | ||
129 | if (!trigger || !action) { | |
130 | goto end; | |
131 | } | |
132 | ||
133 | trigger_copy = lttng_trigger_copy(trigger); | |
134 | if (!trigger_copy) { | |
135 | goto end; | |
136 | } | |
137 | ||
138 | /* | |
139 | * If an action is not the top-level action of the trigger, our only | |
140 | * hope of finding its position is if the top-level action is an | |
141 | * action list. | |
142 | * | |
143 | * Note that action comparisons are performed by pointer since multiple | |
144 | * otherwise identical actions can be found in an action group (two | |
145 | * notify actions, for example). | |
146 | */ | |
147 | if (action != trigger->action && | |
148 | lttng_action_get_type(trigger->action) == | |
149 | LTTNG_ACTION_TYPE_GROUP) { | |
150 | unsigned int i, action_group_count; | |
151 | enum lttng_action_status action_status; | |
152 | ||
153 | action_status = lttng_action_group_get_count( | |
154 | trigger->action, &action_group_count); | |
155 | if (action_status != LTTNG_ACTION_STATUS_OK) { | |
156 | goto end; | |
157 | } | |
158 | ||
159 | for (i = 0; i < action_group_count; i++) { | |
160 | const struct lttng_action *candidate_action = | |
161 | lttng_action_group_get_at_index( | |
162 | trigger->action, i); | |
163 | ||
164 | assert(candidate_action); | |
165 | if (candidate_action == action) { | |
166 | LTTNG_OPTIONAL_SET(&action_index, i); | |
167 | break; | |
168 | } | |
169 | } | |
170 | ||
171 | if (!action_index.is_set) { | |
172 | /* Not found; invalid action. */ | |
173 | goto end; | |
174 | } | |
175 | } else { | |
176 | /* | |
177 | * Trigger action is not a group and not equal to the target | |
178 | * action; invalid action provided. | |
179 | */ | |
180 | goto end; | |
181 | } | |
182 | ||
183 | query = zmalloc(sizeof(*query)); | |
184 | if (!query) { | |
185 | PERROR("Failed to allocate action error query"); | |
186 | goto end; | |
187 | } | |
188 | ||
189 | query->parent.target_type = LTTNG_ERROR_QUERY_TARGET_TYPE_ACTION; | |
190 | query->trigger = trigger_copy; | |
191 | query->action_index = action_index; | |
192 | end: | |
193 | return query ? &query->parent : NULL; | |
194 | } | |
195 | ||
196 | void lttng_error_query_destroy(struct lttng_error_query *query) | |
197 | { | |
198 | struct lttng_error_query_trigger *trigger_query; | |
199 | ||
200 | if (!query) { | |
201 | return; | |
202 | } | |
203 | ||
204 | trigger_query = container_of(query, typeof(*trigger_query), parent); | |
205 | lttng_trigger_put(trigger_query->trigger); | |
206 | free(trigger_query); | |
207 | } | |
208 | ||
209 | static | |
210 | int lttng_error_query_result_counter_serialize( | |
211 | const struct lttng_error_query_result *result, | |
212 | struct lttng_payload *payload) | |
213 | { | |
214 | const struct lttng_error_query_result_counter *counter_result; | |
215 | ||
216 | assert(result->type == LTTNG_ERROR_QUERY_RESULT_TYPE_COUNTER); | |
217 | counter_result = container_of(result, typeof(*counter_result), parent); | |
218 | ||
219 | return lttng_dynamic_buffer_append(&payload->buffer, | |
220 | &(struct lttng_error_query_result_counter_comm) { | |
221 | .value = counter_result->value | |
222 | }, | |
223 | sizeof(struct lttng_error_query_result_counter_comm)); | |
224 | } | |
225 | ||
226 | LTTNG_HIDDEN | |
227 | int lttng_error_query_result_serialize( | |
228 | const struct lttng_error_query_result *result, | |
229 | struct lttng_payload *payload) | |
230 | { | |
231 | int ret; | |
232 | struct lttng_error_query_result_comm header = { | |
233 | .type = (uint8_t) result->type, | |
234 | .name_len = (typeof(header.name_len)) strlen(result->name) + 1, | |
235 | .description_len = (typeof(header.name_len)) strlen(result->description) + 1, | |
236 | }; | |
237 | ||
238 | /* Header. */ | |
239 | ret = lttng_dynamic_buffer_append( | |
240 | &payload->buffer, &header, sizeof(header)); | |
241 | if (ret) { | |
242 | ERR("Failed to append error query result communication header to payload"); | |
243 | goto end; | |
244 | } | |
245 | ||
246 | /* Name. */ | |
247 | ret = lttng_dynamic_buffer_append( | |
248 | &payload->buffer, result->name, header.name_len); | |
249 | if (ret) { | |
250 | ERR("Failed to append error query result name to payload"); | |
251 | goto end; | |
252 | } | |
253 | ||
254 | /* Description. */ | |
255 | ret = lttng_dynamic_buffer_append(&payload->buffer, result->description, | |
256 | header.description_len); | |
257 | if (ret) { | |
258 | ERR("Failed to append error query result description to payload"); | |
259 | goto end; | |
260 | } | |
261 | ||
262 | /* Type-specific payload. */ | |
263 | switch (result->type) { | |
264 | case LTTNG_ERROR_QUERY_RESULT_TYPE_COUNTER: | |
265 | ret = lttng_error_query_result_counter_serialize( | |
266 | result, payload); | |
267 | if (ret) { | |
268 | ERR("Failed to serialize counter error query result"); | |
269 | goto end; | |
270 | } | |
271 | break; | |
272 | default: | |
273 | abort(); | |
274 | } | |
275 | ||
276 | end: | |
277 | return ret; | |
278 | } | |
279 | ||
280 | static | |
281 | int lttng_error_query_result_init( | |
282 | struct lttng_error_query_result *result, | |
283 | enum lttng_error_query_result_type result_type, | |
284 | const char *name, | |
285 | const char *description) | |
286 | { | |
287 | int ret; | |
288 | ||
289 | assert(name); | |
290 | assert(description); | |
291 | ||
292 | result->type = result_type; | |
293 | ||
294 | result->name = strdup(name); | |
295 | if (!result->name) { | |
296 | PERROR("Failed to copy error query result name"); | |
297 | ret = -1; | |
298 | goto end; | |
299 | } | |
300 | ||
301 | result->description = strdup(description); | |
302 | if (!result->description) { | |
303 | PERROR("Failed to copy error query result description"); | |
304 | ret = -1; | |
305 | goto end; | |
306 | } | |
307 | ||
308 | ret = 0; | |
309 | end: | |
310 | return ret; | |
311 | } | |
312 | ||
313 | LTTNG_HIDDEN | |
314 | void lttng_error_query_result_destroy(struct lttng_error_query_result *counter) | |
315 | { | |
316 | if (!counter) { | |
317 | return; | |
318 | } | |
319 | ||
320 | switch (counter->type) { | |
321 | case LTTNG_ERROR_QUERY_RESULT_TYPE_COUNTER: | |
322 | /* Nothing to tear down. */ | |
323 | break; | |
324 | default: | |
325 | abort(); | |
326 | } | |
327 | ||
328 | free(counter->name); | |
329 | free(counter->description); | |
330 | free(counter); | |
331 | } | |
332 | ||
333 | LTTNG_HIDDEN | |
334 | struct lttng_error_query_result * | |
335 | lttng_error_query_result_counter_create( | |
336 | const char *name, const char *description, uint64_t value) | |
337 | { | |
338 | int init_ret; | |
339 | struct lttng_error_query_result_counter *counter; | |
340 | ||
341 | counter = zmalloc(sizeof(*counter)); | |
342 | if (!counter) { | |
343 | PERROR("Failed to allocate error query counter result"); | |
344 | goto end; | |
345 | } | |
346 | ||
347 | init_ret = lttng_error_query_result_init(&counter->parent, | |
348 | LTTNG_ERROR_QUERY_RESULT_TYPE_COUNTER, name, | |
349 | description); | |
350 | if (init_ret) { | |
351 | goto error; | |
352 | } | |
353 | ||
354 | goto end; | |
355 | error: | |
356 | lttng_error_query_result_destroy(&counter->parent); | |
357 | end: | |
358 | return counter ? &counter->parent : NULL; | |
359 | } | |
360 | ||
361 | static | |
362 | void destroy_result(void *ptr) | |
363 | { | |
364 | struct lttng_error_query_result *result = (typeof(result)) ptr; | |
365 | ||
366 | lttng_error_query_result_destroy(result); | |
367 | } | |
368 | ||
369 | LTTNG_HIDDEN | |
370 | struct lttng_error_query_results *lttng_error_query_results_create(void) | |
371 | { | |
372 | struct lttng_error_query_results *set = zmalloc(sizeof(*set)); | |
373 | ||
374 | if (!set) { | |
375 | PERROR("Failed to allocate an error query result set"); | |
376 | goto end; | |
377 | } | |
378 | ||
379 | lttng_dynamic_pointer_array_init(&set->results, destroy_result); | |
380 | end: | |
381 | return set; | |
382 | } | |
383 | ||
384 | LTTNG_HIDDEN | |
385 | int lttng_error_query_results_add_result( | |
386 | struct lttng_error_query_results *results, | |
387 | struct lttng_error_query_result *result) | |
388 | { | |
389 | return lttng_dynamic_pointer_array_add_pointer( | |
390 | &results->results, result); | |
391 | } | |
392 | ||
393 | LTTNG_HIDDEN | |
394 | ssize_t lttng_error_query_result_create_from_payload( | |
395 | struct lttng_payload_view *view, | |
396 | struct lttng_error_query_result **result) | |
397 | { | |
398 | ssize_t used_size = 0; | |
399 | struct lttng_error_query_result_comm *header; | |
400 | struct lttng_payload_view header_view = | |
401 | lttng_payload_view_from_view(view, 0, sizeof(*header)); | |
402 | const char *name; | |
403 | const char *description; | |
404 | ||
405 | if (!lttng_payload_view_is_valid(&header_view)) { | |
406 | used_size = -1; | |
407 | goto end; | |
408 | } | |
409 | ||
410 | header = (typeof(header)) header_view.buffer.data; | |
411 | used_size += sizeof(*header); | |
412 | ||
413 | { | |
414 | struct lttng_payload_view name_view = | |
415 | lttng_payload_view_from_view(view, used_size, | |
416 | header->name_len); | |
417 | ||
418 | if (!lttng_payload_view_is_valid(&name_view) || | |
419 | !lttng_buffer_view_contains_string( | |
420 | &name_view.buffer, | |
421 | name_view.buffer.data, | |
422 | header->name_len)) { | |
423 | used_size = -1; | |
424 | goto end; | |
425 | } | |
426 | ||
427 | name = name_view.buffer.data; | |
428 | used_size += header->name_len; | |
429 | } | |
430 | ||
431 | { | |
432 | struct lttng_payload_view description_view = | |
433 | lttng_payload_view_from_view(view, used_size, | |
434 | header->description_len); | |
435 | ||
436 | if (!lttng_payload_view_is_valid(&description_view) || | |
437 | !lttng_buffer_view_contains_string( | |
438 | &description_view.buffer, | |
439 | description_view.buffer.data, | |
440 | header->description_len)) { | |
441 | used_size = -1; | |
442 | goto end; | |
443 | } | |
444 | ||
445 | description = description_view.buffer.data; | |
446 | used_size += header->description_len; | |
447 | } | |
448 | ||
449 | switch (header->type) { | |
450 | case LTTNG_ERROR_QUERY_RESULT_TYPE_COUNTER: | |
451 | { | |
452 | struct lttng_error_query_result_counter_comm *counter; | |
453 | struct lttng_payload_view counter_payload_view = | |
454 | lttng_payload_view_from_view(view, used_size, | |
455 | sizeof(*counter)); | |
456 | ||
457 | if (!lttng_payload_view_is_valid(&counter_payload_view)) { | |
458 | used_size = -1; | |
459 | goto end; | |
460 | } | |
461 | ||
462 | counter = (typeof(counter)) counter_payload_view.buffer.data; | |
463 | *result = lttng_error_query_result_counter_create( | |
464 | name, description, counter->value); | |
465 | if (!*result) { | |
466 | used_size = -1; | |
467 | goto end; | |
468 | } | |
469 | ||
470 | used_size += sizeof(*counter); | |
471 | break; | |
472 | } | |
473 | default: | |
474 | used_size = -1; | |
475 | goto end; | |
476 | } | |
477 | ||
478 | end: | |
479 | return used_size; | |
480 | } | |
481 | ||
482 | LTTNG_HIDDEN | |
483 | int lttng_error_query_results_serialize( | |
484 | const struct lttng_error_query_results *results, | |
485 | struct lttng_payload *payload) | |
486 | { | |
487 | int ret; | |
488 | size_t result_index; | |
489 | const size_t result_count = lttng_dynamic_pointer_array_get_count( | |
490 | &results->results); | |
491 | const struct lttng_error_query_results_comm header = { | |
492 | .count = (typeof(header.count)) result_count, | |
493 | }; | |
494 | ||
495 | /* Header. */ | |
496 | ret = lttng_dynamic_buffer_append(&payload->buffer, &header, sizeof(header)); | |
497 | if (ret) { | |
498 | ERR("Failed to append error query result set header to payload"); | |
499 | goto end; | |
500 | } | |
501 | ||
502 | /* Results. */ | |
503 | for (result_index = 0; result_index < result_count; result_index++) { | |
504 | const struct lttng_error_query_result *result = (typeof(result)) | |
505 | lttng_dynamic_pointer_array_get_pointer( | |
506 | &results->results, | |
507 | result_index); | |
508 | ||
509 | ret = lttng_error_query_result_serialize(result, payload); | |
510 | if (ret) { | |
511 | ERR("Failed to append error query result to payload"); | |
512 | goto end; | |
513 | } | |
514 | } | |
515 | end: | |
516 | return ret; | |
517 | } | |
518 | ||
519 | LTTNG_HIDDEN | |
520 | ssize_t lttng_error_query_results_create_from_payload( | |
521 | struct lttng_payload_view *view, | |
522 | struct lttng_error_query_results **_results) | |
523 | { | |
524 | size_t result_index; | |
525 | ssize_t total_used_size = 0; | |
526 | struct lttng_error_query_results_comm *header; | |
527 | struct lttng_payload_view header_view = | |
528 | lttng_payload_view_from_view(view, 0, sizeof(*header)); | |
529 | struct lttng_error_query_results *results = NULL; | |
530 | ||
531 | if (!lttng_payload_view_is_valid(&header_view)) { | |
532 | ERR("Failed to map view to error query result set header"); | |
533 | total_used_size = -1; | |
534 | goto end; | |
535 | } | |
536 | ||
537 | header = (typeof(header)) header_view.buffer.data; | |
538 | total_used_size += sizeof(*header); | |
539 | results = lttng_error_query_results_create(); | |
540 | if (!results) { | |
541 | total_used_size = -1; | |
542 | goto end; | |
543 | } | |
544 | ||
545 | for (result_index = 0; result_index < header->count; result_index++) { | |
546 | ssize_t used_size; | |
547 | struct lttng_error_query_result *result; | |
548 | struct lttng_payload_view result_view = | |
549 | lttng_payload_view_from_view( | |
550 | view, total_used_size, -1); | |
551 | ||
552 | if (!lttng_payload_view_is_valid(&result_view)) { | |
553 | total_used_size = -1; | |
554 | goto end; | |
555 | } | |
556 | ||
557 | used_size = lttng_error_query_result_create_from_payload( | |
558 | &result_view, &result); | |
559 | if (used_size < 0) { | |
560 | total_used_size = -1; | |
561 | goto end; | |
562 | } | |
563 | ||
564 | total_used_size += used_size; | |
565 | ||
566 | if (lttng_dynamic_pointer_array_add_pointer( | |
567 | &results->results, result)) { | |
568 | lttng_error_query_result_destroy(result); | |
569 | total_used_size = -1; | |
570 | goto end; | |
571 | } | |
572 | } | |
573 | ||
574 | *_results = results; | |
575 | results = NULL; | |
576 | end: | |
577 | lttng_error_query_results_destroy(results); | |
578 | return total_used_size; | |
579 | } | |
580 | ||
581 | static | |
582 | int lttng_error_query_trigger_serialize(const struct lttng_error_query *query, | |
583 | struct lttng_payload *payload) | |
584 | { | |
585 | int ret; | |
586 | const struct lttng_error_query_trigger *query_trigger = | |
587 | container_of(query, typeof(*query_trigger), parent); | |
588 | ||
589 | if (!lttng_trigger_validate(query_trigger->trigger)) { | |
590 | ret = -1; | |
591 | goto end; | |
592 | } | |
593 | ||
594 | ret = lttng_trigger_serialize(query_trigger->trigger, payload); | |
595 | if (ret) { | |
596 | goto end; | |
597 | } | |
598 | ||
599 | end: | |
600 | return ret; | |
601 | } | |
602 | ||
603 | static | |
604 | int lttng_error_query_action_serialize(const struct lttng_error_query *query, | |
605 | struct lttng_payload *payload) | |
606 | { | |
607 | int ret; | |
608 | const struct lttng_error_query_action *query_action = | |
609 | container_of(query, typeof(*query_action), parent); | |
610 | struct lttng_error_query_action_comm header = { | |
611 | .action_index.is_set = query_action->action_index.is_set, | |
612 | .action_index.value = query_action->action_index.value, | |
613 | }; | |
614 | ||
615 | if (!lttng_trigger_validate(query_action->trigger)) { | |
616 | ret = -1; | |
617 | goto end; | |
618 | } | |
619 | ||
620 | ret = lttng_dynamic_buffer_append( | |
621 | &payload->buffer, &header, sizeof(header)); | |
622 | if (ret) { | |
623 | goto end; | |
624 | } | |
625 | ||
626 | ret = lttng_trigger_serialize(query_action->trigger, payload); | |
627 | if (ret) { | |
628 | goto end; | |
629 | } | |
630 | end: | |
631 | return ret; | |
632 | } | |
633 | ||
634 | LTTNG_HIDDEN | |
635 | enum lttng_error_query_target_type lttng_error_query_get_target_type( | |
636 | const struct lttng_error_query *query) | |
637 | { | |
638 | return query->target_type; | |
639 | } | |
640 | ||
641 | LTTNG_HIDDEN | |
642 | const struct lttng_trigger *lttng_error_query_trigger_borrow_target( | |
643 | const struct lttng_error_query *query) | |
644 | { | |
645 | const struct lttng_error_query_trigger *query_trigger = | |
646 | container_of(query, typeof(*query_trigger), parent); | |
647 | ||
648 | return query_trigger->trigger; | |
649 | } | |
650 | ||
651 | LTTNG_HIDDEN | |
652 | const struct lttng_trigger *lttng_error_query_action_borrow_trigger_target( | |
653 | const struct lttng_error_query *query) | |
654 | { | |
655 | const struct lttng_error_query_action *query_action = | |
656 | container_of(query, typeof(*query_action), parent); | |
657 | ||
658 | return query_action->trigger; | |
659 | } | |
660 | ||
661 | LTTNG_HIDDEN | |
662 | const struct lttng_action *lttng_error_query_action_borrow_action_target( | |
663 | const struct lttng_error_query *query, | |
664 | const struct lttng_trigger *trigger) | |
665 | { | |
666 | const struct lttng_action *target_action = NULL; | |
667 | const struct lttng_error_query_action *query_action = | |
668 | container_of(query, typeof(*query_action), parent); | |
669 | const struct lttng_action *trigger_action = | |
670 | lttng_trigger_get_const_action(trigger); | |
671 | ||
672 | if (!query_action->action_index.is_set) { | |
673 | target_action = trigger_action; | |
674 | } else { | |
675 | if (lttng_action_get_type(trigger_action) != | |
676 | LTTNG_ACTION_TYPE_GROUP) { | |
677 | ERR("Invalid action error query target index: trigger action is not a group"); | |
678 | goto end; | |
679 | } | |
680 | ||
681 | target_action = lttng_action_group_get_at_index(trigger_action, | |
682 | LTTNG_OPTIONAL_GET(query_action->action_index)); | |
683 | } | |
684 | ||
685 | end: | |
686 | return target_action; | |
687 | } | |
688 | ||
689 | LTTNG_HIDDEN | |
690 | int lttng_error_query_serialize(const struct lttng_error_query *query, | |
691 | struct lttng_payload *payload) | |
692 | { | |
693 | int ret; | |
694 | struct lttng_error_query_comm header = { | |
695 | .target_type = (typeof(header.target_type)) query->target_type, | |
696 | }; | |
697 | ||
698 | ret = lttng_dynamic_buffer_append( | |
699 | &payload->buffer, &header, sizeof(header)); | |
700 | if (ret) { | |
701 | ERR("Failed to append error query header to payload"); | |
702 | goto end; | |
703 | } | |
704 | ||
705 | switch (query->target_type) { | |
706 | case LTTNG_ERROR_QUERY_TARGET_TYPE_TRIGGER: | |
707 | ret = lttng_error_query_trigger_serialize(query, payload); | |
708 | if (ret) { | |
709 | goto end; | |
710 | } | |
711 | ||
712 | break; | |
713 | case LTTNG_ERROR_QUERY_TARGET_TYPE_ACTION: | |
714 | ret = lttng_error_query_action_serialize(query, payload); | |
715 | if (ret) { | |
716 | goto end; | |
717 | } | |
718 | ||
719 | break; | |
720 | default: | |
721 | abort(); | |
722 | } | |
723 | end: | |
724 | return ret; | |
725 | } | |
726 | ||
727 | LTTNG_HIDDEN | |
728 | ssize_t lttng_error_query_create_from_payload(struct lttng_payload_view *view, | |
729 | struct lttng_error_query **query) | |
730 | { | |
731 | ssize_t used_size = 0; | |
732 | struct lttng_error_query_comm *header; | |
733 | struct lttng_payload_view header_view = | |
734 | lttng_payload_view_from_view(view, 0, sizeof(*header)); | |
735 | ||
736 | if (!lttng_payload_view_is_valid(&header_view)) { | |
737 | ERR("Failed to map error query header"); | |
738 | used_size = -1; | |
739 | goto end; | |
740 | } | |
741 | ||
742 | used_size = sizeof(*header); | |
743 | ||
744 | header = (typeof(header)) header_view.buffer.data; | |
745 | switch ((enum lttng_error_query_target_type) header->target_type) { | |
746 | case LTTNG_ERROR_QUERY_TARGET_TYPE_TRIGGER: | |
747 | { | |
748 | struct lttng_trigger *trigger; | |
749 | ssize_t trigger_used_size; | |
750 | struct lttng_payload_view trigger_view = | |
751 | lttng_payload_view_from_view( | |
752 | view, used_size, -1); | |
753 | ||
754 | if (!lttng_payload_view_is_valid(&trigger_view)) { | |
755 | used_size = -1; | |
756 | goto end; | |
757 | } | |
758 | ||
759 | trigger_used_size = lttng_trigger_create_from_payload( | |
760 | &trigger_view, &trigger); | |
761 | if (trigger_used_size < 0) { | |
762 | used_size = -1; | |
763 | goto end; | |
764 | } | |
765 | ||
766 | used_size += trigger_used_size; | |
767 | ||
768 | *query = lttng_error_query_trigger_create(trigger); | |
769 | lttng_trigger_put(trigger); | |
770 | if (!*query) { | |
771 | used_size = -1; | |
772 | goto end; | |
773 | } | |
774 | ||
775 | break; | |
776 | } | |
777 | case LTTNG_ERROR_QUERY_TARGET_TYPE_ACTION: | |
778 | { | |
779 | struct lttng_trigger *trigger; | |
780 | const struct lttng_action *target_action; | |
781 | ssize_t trigger_used_size; | |
782 | struct lttng_error_query_action_comm *action_header; | |
783 | ||
784 | { | |
785 | struct lttng_payload_view action_header_view = | |
786 | lttng_payload_view_from_view(view, | |
787 | used_size, | |
788 | sizeof(*action_header)); | |
789 | ||
790 | if (!lttng_payload_view_is_valid(&action_header_view)) { | |
791 | used_size = -1; | |
792 | goto end; | |
793 | } | |
794 | ||
795 | action_header = (typeof(action_header)) action_header_view.buffer.data; | |
796 | used_size += sizeof(*action_header); | |
797 | } | |
798 | ||
799 | { | |
800 | struct lttng_payload_view trigger_view = | |
801 | lttng_payload_view_from_view( | |
802 | view, used_size, -1); | |
803 | ||
804 | if (!lttng_payload_view_is_valid(&trigger_view)) { | |
805 | used_size = -1; | |
806 | goto end; | |
807 | } | |
808 | ||
809 | trigger_used_size = lttng_trigger_create_from_payload( | |
810 | &trigger_view, &trigger); | |
811 | if (trigger_used_size < 0) { | |
812 | used_size = -1; | |
813 | goto end; | |
814 | } | |
815 | ||
816 | used_size += trigger_used_size; | |
817 | } | |
818 | ||
819 | if (!action_header->action_index.is_set) { | |
820 | target_action = trigger->action; | |
821 | } else { | |
822 | if (lttng_action_get_type(trigger->action) != | |
823 | LTTNG_ACTION_TYPE_GROUP) { | |
824 | used_size = -1; | |
825 | goto end; | |
826 | } | |
827 | ||
828 | target_action = lttng_action_group_get_at_index( | |
829 | trigger->action, | |
830 | action_header->action_index.value); | |
831 | } | |
832 | ||
833 | *query = lttng_error_query_action_create( | |
834 | trigger, target_action); | |
835 | lttng_trigger_put(trigger); | |
836 | if (!*query) { | |
837 | used_size = -1; | |
838 | goto end; | |
839 | } | |
840 | ||
841 | break; | |
842 | } | |
843 | default: | |
844 | used_size = -1; | |
845 | goto end; | |
846 | } | |
847 | ||
848 | end: | |
849 | return used_size; | |
850 | } | |
851 | ||
852 | enum lttng_error_query_results_status lttng_error_query_results_get_count( | |
853 | const struct lttng_error_query_results *results, | |
854 | unsigned int *count) | |
855 | { | |
856 | enum lttng_error_query_results_status status; | |
857 | ||
858 | if (!results || !count) { | |
859 | status = LTTNG_ERROR_QUERY_RESULTS_STATUS_INVALID_PARAMETER; | |
860 | goto end; | |
861 | } | |
862 | ||
863 | *count = lttng_dynamic_pointer_array_get_count(&results->results); | |
864 | status = LTTNG_ERROR_QUERY_RESULTS_STATUS_OK; | |
865 | end: | |
866 | return status; | |
867 | } | |
868 | ||
869 | enum lttng_error_query_results_status | |
870 | lttng_error_query_results_get_result( | |
871 | const struct lttng_error_query_results *results, | |
872 | const struct lttng_error_query_result **result, | |
873 | unsigned int index) | |
874 | { | |
875 | unsigned int result_count; | |
876 | enum lttng_error_query_results_status status; | |
877 | ||
878 | if (!results || !result) { | |
879 | status = LTTNG_ERROR_QUERY_RESULTS_STATUS_INVALID_PARAMETER; | |
880 | goto end; | |
881 | } | |
882 | ||
883 | status = lttng_error_query_results_get_count(results, &result_count); | |
884 | if (status != LTTNG_ERROR_QUERY_RESULTS_STATUS_OK) { | |
885 | goto end; | |
886 | } | |
887 | ||
888 | if (index >= result_count) { | |
889 | status = LTTNG_ERROR_QUERY_RESULTS_STATUS_INVALID_PARAMETER; | |
890 | goto end; | |
891 | } | |
892 | ||
893 | *result = (typeof(*result)) lttng_dynamic_pointer_array_get_pointer( | |
894 | &results->results, index); | |
895 | assert(*result); | |
896 | status = LTTNG_ERROR_QUERY_RESULTS_STATUS_OK; | |
897 | end: | |
898 | return status; | |
899 | } | |
900 | ||
901 | void lttng_error_query_results_destroy( | |
902 | struct lttng_error_query_results *results) | |
903 | { | |
904 | if (!results) { | |
905 | return; | |
906 | } | |
907 | ||
908 | lttng_dynamic_pointer_array_reset(&results->results); | |
909 | free(results); | |
910 | } | |
911 | ||
912 | enum lttng_error_query_result_type | |
913 | lttng_error_query_result_get_type(const struct lttng_error_query_result *result) | |
914 | { | |
915 | return result ? result->type : LTTNG_ERROR_QUERY_RESULT_TYPE_UNKNOWN; | |
916 | } | |
917 | ||
918 | enum lttng_error_query_result_status lttng_error_query_result_get_name( | |
919 | const struct lttng_error_query_result *result, | |
920 | const char **name) | |
921 | { | |
922 | enum lttng_error_query_result_status status; | |
923 | ||
924 | if (!result || !name) { | |
925 | status = LTTNG_ERROR_QUERY_RESULT_STATUS_INVALID_PARAMETER; | |
926 | goto end; | |
927 | } | |
928 | ||
929 | *name = result->name; | |
930 | status = LTTNG_ERROR_QUERY_RESULT_STATUS_OK; | |
931 | end: | |
932 | return status; | |
933 | } | |
934 | ||
935 | enum lttng_error_query_result_status lttng_error_query_result_get_description( | |
936 | const struct lttng_error_query_result *result, | |
937 | const char **description) | |
938 | { | |
939 | enum lttng_error_query_result_status status; | |
940 | ||
941 | if (!result || !description) { | |
942 | status = LTTNG_ERROR_QUERY_RESULT_STATUS_INVALID_PARAMETER; | |
943 | goto end; | |
944 | } | |
945 | ||
946 | *description = result->description; | |
947 | status = LTTNG_ERROR_QUERY_RESULT_STATUS_OK; | |
948 | end: | |
949 | return status; | |
950 | } | |
951 | ||
952 | enum lttng_error_query_result_status lttng_error_query_result_counter_get_value( | |
953 | const struct lttng_error_query_result *result, | |
954 | uint64_t *value) | |
955 | { | |
956 | enum lttng_error_query_result_status status; | |
957 | const struct lttng_error_query_result_counter *counter_result; | |
958 | ||
959 | if (!result || !value || | |
960 | result->type != LTTNG_ERROR_QUERY_RESULT_TYPE_COUNTER) { | |
961 | status = LTTNG_ERROR_QUERY_RESULT_STATUS_INVALID_PARAMETER; | |
962 | goto end; | |
963 | } | |
964 | ||
965 | counter_result = container_of(result, typeof(*counter_result), parent); | |
966 | ||
967 | *value = counter_result->value; | |
968 | status = LTTNG_ERROR_QUERY_RESULT_STATUS_OK; | |
969 | end: | |
970 | return status; | |
971 | } |