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> | |
28ab034a | 15 | |
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> | |
28ab034a JG |
26 | |
27 | #include <inttypes.h> | |
9c374932 | 28 | #include <pthread.h> |
a58c490f | 29 | |
b61776fb | 30 | bool lttng_trigger_validate(const struct lttng_trigger *trigger) |
a58c490f JG |
31 | { |
32 | bool valid; | |
33 | ||
34 | if (!trigger) { | |
35 | valid = false; | |
36 | goto end; | |
37 | } | |
38 | ||
64eafdf6 JR |
39 | if (!trigger->creds.uid.is_set) { |
40 | valid = false; | |
41 | goto end; | |
42 | } | |
43 | ||
a58c490f | 44 | valid = lttng_condition_validate(trigger->condition) && |
28ab034a | 45 | lttng_action_validate(trigger->action); |
a58c490f JG |
46 | end: |
47 | return valid; | |
48 | } | |
49 | ||
28ab034a JG |
50 | struct lttng_trigger *lttng_trigger_create(struct lttng_condition *condition, |
51 | struct lttng_action *action) | |
a58c490f | 52 | { |
cd9adb8b | 53 | struct lttng_trigger *trigger = nullptr; |
a58c490f JG |
54 | |
55 | if (!condition || !action) { | |
56 | goto end; | |
57 | } | |
58 | ||
64803277 | 59 | trigger = zmalloc<lttng_trigger>(); |
a58c490f JG |
60 | if (!trigger) { |
61 | goto end; | |
62 | } | |
63 | ||
f01d28b4 JR |
64 | urcu_ref_init(&trigger->ref); |
65 | ||
7ca172c1 | 66 | lttng_condition_get(condition); |
a58c490f | 67 | trigger->condition = condition; |
7ca172c1 JR |
68 | |
69 | lttng_action_get(action); | |
a58c490f | 70 | trigger->action = action; |
3da864a9 | 71 | |
cd9adb8b | 72 | pthread_mutex_init(&trigger->lock, nullptr); |
9c374932 JR |
73 | trigger->registered = false; |
74 | ||
a58c490f JG |
75 | end: |
76 | return trigger; | |
77 | } | |
78 | ||
7ca172c1 JR |
79 | /* |
80 | * Note: the lack of reference counting 'get' on the condition object is normal. | |
81 | * This API was exposed as such in 2.11. The client is not expected to call | |
82 | * lttng_condition_destroy on the returned object. | |
83 | */ | |
28ab034a | 84 | struct lttng_condition *lttng_trigger_get_condition(struct lttng_trigger *trigger) |
a58c490f | 85 | { |
cd9adb8b | 86 | return trigger ? trigger->condition : nullptr; |
a58c490f JG |
87 | } |
88 | ||
28ab034a | 89 | const struct lttng_condition *lttng_trigger_get_const_condition(const struct lttng_trigger *trigger) |
9b63a4aa | 90 | { |
cd9adb8b | 91 | return trigger ? trigger->condition : nullptr; |
9b63a4aa JG |
92 | } |
93 | ||
7ca172c1 JR |
94 | /* |
95 | * Note: the lack of reference counting 'get' on the action object is normal. | |
96 | * This API was exposed as such in 2.11. The client is not expected to call | |
97 | * lttng_action_destroy on the returned object. | |
98 | */ | |
28ab034a | 99 | struct lttng_action *lttng_trigger_get_action(struct lttng_trigger *trigger) |
a58c490f | 100 | { |
cd9adb8b | 101 | return trigger ? trigger->action : nullptr; |
a58c490f JG |
102 | } |
103 | ||
28ab034a | 104 | const struct lttng_action *lttng_trigger_get_const_action(const struct lttng_trigger *trigger) |
9b63a4aa | 105 | { |
cd9adb8b | 106 | return trigger ? trigger->action : nullptr; |
9b63a4aa JG |
107 | } |
108 | ||
f01d28b4 | 109 | static void trigger_destroy_ref(struct urcu_ref *ref) |
a58c490f | 110 | { |
28ab034a | 111 | struct lttng_trigger *trigger = lttng::utils::container_of(ref, <tng_trigger::ref); |
7ca172c1 | 112 | struct lttng_action *action = lttng_trigger_get_action(trigger); |
28ab034a | 113 | struct lttng_condition *condition = lttng_trigger_get_condition(trigger); |
7ca172c1 | 114 | |
a0377dfe FD |
115 | LTTNG_ASSERT(action); |
116 | LTTNG_ASSERT(condition); | |
7ca172c1 JR |
117 | |
118 | /* Release ownership. */ | |
119 | lttng_action_put(action); | |
120 | lttng_condition_put(condition); | |
121 | ||
9c374932 JR |
122 | pthread_mutex_destroy(&trigger->lock); |
123 | ||
242388e4 | 124 | free(trigger->name); |
a58c490f JG |
125 | free(trigger); |
126 | } | |
127 | ||
f01d28b4 JR |
128 | void lttng_trigger_destroy(struct lttng_trigger *trigger) |
129 | { | |
130 | lttng_trigger_put(trigger); | |
131 | } | |
132 | ||
28ab034a JG |
133 | ssize_t lttng_trigger_create_from_payload(struct lttng_payload_view *src_view, |
134 | struct lttng_trigger **_trigger) | |
a58c490f | 135 | { |
242388e4 | 136 | ssize_t ret, offset = 0, condition_size, action_size, name_size = 0; |
cd9adb8b JG |
137 | struct lttng_condition *condition = nullptr; |
138 | struct lttng_action *action = nullptr; | |
a58c490f | 139 | const struct lttng_trigger_comm *trigger_comm; |
cd9adb8b | 140 | const char *name = nullptr; |
64eafdf6 JR |
141 | struct lttng_credentials creds = { |
142 | .uid = LTTNG_OPTIONAL_INIT_UNSET, | |
143 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
144 | }; | |
cd9adb8b | 145 | struct lttng_trigger *trigger = nullptr; |
3e6e0df2 | 146 | const struct lttng_payload_view trigger_comm_view = |
28ab034a | 147 | lttng_payload_view_from_view(src_view, 0, sizeof(*trigger_comm)); |
a58c490f | 148 | |
6808ef55 | 149 | if (!src_view || !_trigger) { |
a58c490f JG |
150 | ret = -1; |
151 | goto end; | |
152 | } | |
153 | ||
3e6e0df2 JG |
154 | if (!lttng_payload_view_is_valid(&trigger_comm_view)) { |
155 | /* Payload not large enough to contain the header. */ | |
156 | ret = -1; | |
157 | goto end; | |
158 | } | |
159 | ||
a58c490f | 160 | /* lttng_trigger_comm header */ |
3e6e0df2 | 161 | trigger_comm = (typeof(trigger_comm)) trigger_comm_view.buffer.data; |
64eafdf6 JR |
162 | |
163 | /* Set the trigger's creds. */ | |
164 | if (trigger_comm->uid > (uint64_t) ((uid_t) -1)) { | |
165 | /* UID out of range for this platform. */ | |
166 | ret = -1; | |
167 | goto end; | |
168 | } | |
169 | ||
170 | LTTNG_OPTIONAL_SET(&creds.uid, trigger_comm->uid); | |
171 | ||
a58c490f | 172 | offset += sizeof(*trigger_comm); |
242388e4 JR |
173 | |
174 | if (trigger_comm->name_length != 0) { | |
175 | /* Name. */ | |
176 | const struct lttng_payload_view name_view = | |
28ab034a | 177 | lttng_payload_view_from_view(src_view, offset, trigger_comm->name_length); |
3e6e0df2 JG |
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; | |
28ab034a JG |
185 | if (!lttng_buffer_view_contains_string( |
186 | &name_view.buffer, name, trigger_comm->name_length)) { | |
242388e4 JR |
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 = | |
28ab034a | 198 | lttng_payload_view_from_view(src_view, offset, -1); |
c0a66c84 | 199 | |
28ab034a | 200 | condition_size = lttng_condition_create_from_payload(&condition_view, &condition); |
c0a66c84 | 201 | } |
a58c490f | 202 | |
a58c490f JG |
203 | if (condition_size < 0) { |
204 | ret = condition_size; | |
205 | goto end; | |
206 | } | |
c0a66c84 | 207 | |
a58c490f | 208 | offset += condition_size; |
c0a66c84 JG |
209 | { |
210 | /* struct lttng_action */ | |
211 | struct lttng_payload_view action_view = | |
28ab034a | 212 | lttng_payload_view_from_view(src_view, offset, -1); |
c0a66c84 JG |
213 | |
214 | action_size = lttng_action_create_from_payload(&action_view, &action); | |
215 | } | |
a58c490f | 216 | |
a58c490f JG |
217 | if (action_size < 0) { |
218 | ret = action_size; | |
219 | goto end; | |
220 | } | |
221 | offset += action_size; | |
222 | ||
223 | /* Unexpected size of inner-elements; the buffer is corrupted. */ | |
242388e4 | 224 | if ((ssize_t) trigger_comm->length != condition_size + action_size + name_size) { |
a58c490f JG |
225 | ret = -1; |
226 | goto error; | |
227 | } | |
228 | ||
6808ef55 JG |
229 | trigger = lttng_trigger_create(condition, action); |
230 | if (!trigger) { | |
a58c490f JG |
231 | ret = -1; |
232 | goto error; | |
233 | } | |
c0a66c84 | 234 | |
6808ef55 | 235 | lttng_trigger_set_credentials(trigger, &creds); |
64eafdf6 | 236 | |
7ca172c1 JR |
237 | /* |
238 | * The trigger object owns references to the action and condition | |
239 | * objects. | |
240 | */ | |
241 | lttng_condition_put(condition); | |
cd9adb8b | 242 | condition = nullptr; |
7ca172c1 JR |
243 | |
244 | lttng_action_put(action); | |
cd9adb8b | 245 | action = nullptr; |
7ca172c1 | 246 | |
242388e4 | 247 | if (name) { |
28ab034a | 248 | const enum lttng_trigger_status status = lttng_trigger_set_name(trigger, name); |
242388e4 JR |
249 | |
250 | if (status != LTTNG_TRIGGER_STATUS_OK) { | |
251 | ret = -1; | |
252 | goto end; | |
253 | } | |
254 | } | |
255 | ||
f4d2c26a JG |
256 | if (trigger_comm->is_hidden) { |
257 | lttng_trigger_set_hidden(trigger); | |
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: |
f5d98ed9 | 266 | if (ret >= 0) { |
6808ef55 JG |
267 | *_trigger = trigger; |
268 | } else { | |
269 | lttng_trigger_put(trigger); | |
270 | } | |
271 | ||
a58c490f JG |
272 | return ret; |
273 | } | |
274 | ||
275 | /* | |
a58c490f JG |
276 | * Both elements are stored contiguously, see their "*_comm" structure |
277 | * for the detailed format. | |
278 | */ | |
28ab034a | 279 | int lttng_trigger_serialize(const struct lttng_trigger *trigger, struct lttng_payload *payload) |
a58c490f | 280 | { |
3647288f | 281 | int ret; |
242388e4 | 282 | size_t header_offset, size_before_payload, size_name; |
c0a66c84 | 283 | struct lttng_trigger_comm trigger_comm = {}; |
3647288f | 284 | struct lttng_trigger_comm *header; |
cd9adb8b | 285 | const struct lttng_credentials *creds = nullptr; |
64eafdf6 JR |
286 | |
287 | creds = lttng_trigger_get_credentials(trigger); | |
a0377dfe | 288 | LTTNG_ASSERT(creds); |
64eafdf6 JR |
289 | |
290 | trigger_comm.uid = LTTNG_OPTIONAL_GET(creds->uid); | |
a58c490f | 291 | |
cd9adb8b | 292 | if (trigger->name != nullptr) { |
242388e4 JR |
293 | size_name = strlen(trigger->name) + 1; |
294 | } else { | |
295 | size_name = 0; | |
296 | } | |
297 | ||
298 | trigger_comm.name_length = size_name; | |
299 | ||
f4d2c26a JG |
300 | trigger_comm.is_hidden = lttng_trigger_is_hidden(trigger); |
301 | ||
c0a66c84 | 302 | header_offset = payload->buffer.size; |
28ab034a | 303 | ret = lttng_dynamic_buffer_append(&payload->buffer, &trigger_comm, sizeof(trigger_comm)); |
3647288f | 304 | if (ret) { |
a58c490f JG |
305 | goto end; |
306 | } | |
307 | ||
c0a66c84 | 308 | size_before_payload = payload->buffer.size; |
242388e4 JR |
309 | |
310 | /* Trigger name. */ | |
28ab034a | 311 | ret = lttng_dynamic_buffer_append(&payload->buffer, trigger->name, size_name); |
242388e4 JR |
312 | if (ret) { |
313 | goto end; | |
314 | } | |
315 | ||
c0a66c84 | 316 | ret = lttng_condition_serialize(trigger->condition, payload); |
3647288f | 317 | if (ret) { |
a58c490f JG |
318 | goto end; |
319 | } | |
a58c490f | 320 | |
c0a66c84 | 321 | ret = lttng_action_serialize(trigger->action, payload); |
3647288f | 322 | if (ret) { |
a58c490f JG |
323 | goto end; |
324 | } | |
a58c490f | 325 | |
3647288f | 326 | /* Update payload size. */ |
c0a66c84 JG |
327 | header = (typeof(header)) (payload->buffer.data + header_offset); |
328 | header->length = payload->buffer.size - size_before_payload; | |
a58c490f JG |
329 | end: |
330 | return ret; | |
331 | } | |
3da864a9 | 332 | |
28ab034a | 333 | bool lttng_trigger_is_equal(const struct lttng_trigger *a, const struct lttng_trigger *b) |
85c06c44 | 334 | { |
0efb2ad7 JG |
335 | if (!!a->name != !!b->name) { |
336 | /* Both must be either anonymous or named. */ | |
337 | return false; | |
338 | } | |
339 | ||
340 | if (a->name && strcmp(a->name, b->name) != 0) { | |
1ca78886 FD |
341 | return false; |
342 | } | |
343 | ||
85c06c44 JR |
344 | if (!lttng_condition_is_equal(a->condition, b->condition)) { |
345 | return false; | |
346 | } | |
347 | ||
348 | if (!lttng_action_is_equal(a->action, b->action)) { | |
349 | return false; | |
350 | } | |
351 | ||
352 | if (!lttng_credentials_is_equal(lttng_trigger_get_credentials(a), | |
28ab034a | 353 | lttng_trigger_get_credentials(b))) { |
85c06c44 JR |
354 | return false; |
355 | } | |
356 | ||
f2bda80e JG |
357 | if (a->is_hidden != b->is_hidden) { |
358 | return false; | |
359 | } | |
360 | ||
85c06c44 JR |
361 | return true; |
362 | } | |
363 | ||
f2bda80e JG |
364 | bool lttng_trigger_is_hidden(const struct lttng_trigger *trigger) |
365 | { | |
6ce1601f | 366 | LTTNG_ASSERT(trigger); |
f2bda80e JG |
367 | return trigger->is_hidden; |
368 | } | |
369 | ||
f2bda80e JG |
370 | void lttng_trigger_set_hidden(struct lttng_trigger *trigger) |
371 | { | |
a0377dfe | 372 | LTTNG_ASSERT(!trigger->is_hidden); |
f2bda80e JG |
373 | trigger->is_hidden = true; |
374 | } | |
375 | ||
28ab034a | 376 | enum lttng_trigger_status lttng_trigger_set_name(struct lttng_trigger *trigger, const char *name) |
242388e4 | 377 | { |
cd9adb8b | 378 | char *name_copy = nullptr; |
242388e4 JR |
379 | enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK; |
380 | ||
a5c2d2a7 | 381 | if (!trigger) { |
242388e4 JR |
382 | status = LTTNG_TRIGGER_STATUS_INVALID; |
383 | goto end; | |
384 | } | |
385 | ||
a5c2d2a7 JG |
386 | if (name) { |
387 | name_copy = strdup(name); | |
388 | if (!name_copy) { | |
389 | status = LTTNG_TRIGGER_STATUS_ERROR; | |
390 | goto end; | |
391 | } | |
242388e4 JR |
392 | } |
393 | ||
394 | free(trigger->name); | |
395 | ||
396 | trigger->name = name_copy; | |
cd9adb8b | 397 | name_copy = nullptr; |
242388e4 JR |
398 | end: |
399 | return status; | |
400 | } | |
401 | ||
28ab034a JG |
402 | enum lttng_trigger_status lttng_trigger_get_name(const struct lttng_trigger *trigger, |
403 | const char **name) | |
242388e4 JR |
404 | { |
405 | enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK; | |
406 | ||
407 | if (!trigger || !name) { | |
408 | status = LTTNG_TRIGGER_STATUS_INVALID; | |
409 | goto end; | |
410 | } | |
411 | ||
412 | if (!trigger->name) { | |
413 | status = LTTNG_TRIGGER_STATUS_UNSET; | |
414 | } | |
415 | ||
416 | *name = trigger->name; | |
417 | end: | |
418 | return status; | |
419 | } | |
420 | ||
28ab034a | 421 | int lttng_trigger_assign_name(struct lttng_trigger *dst, const struct lttng_trigger *src) |
242388e4 JR |
422 | { |
423 | int ret = 0; | |
424 | enum lttng_trigger_status status; | |
425 | ||
426 | status = lttng_trigger_set_name(dst, src->name); | |
427 | if (status != LTTNG_TRIGGER_STATUS_OK) { | |
428 | ret = -1; | |
429 | ERR("Failed to set name for trigger"); | |
430 | goto end; | |
431 | } | |
432 | end: | |
433 | return ret; | |
434 | } | |
435 | ||
28ab034a | 436 | void lttng_trigger_set_tracer_token(struct lttng_trigger *trigger, uint64_t token) |
e6887944 | 437 | { |
a0377dfe | 438 | LTTNG_ASSERT(trigger); |
e6887944 JR |
439 | LTTNG_OPTIONAL_SET(&trigger->tracer_token, token); |
440 | } | |
441 | ||
e6887944 JR |
442 | uint64_t lttng_trigger_get_tracer_token(const struct lttng_trigger *trigger) |
443 | { | |
a0377dfe | 444 | LTTNG_ASSERT(trigger); |
e6887944 JR |
445 | |
446 | return LTTNG_OPTIONAL_GET(trigger->tracer_token); | |
447 | } | |
448 | ||
28ab034a | 449 | int lttng_trigger_generate_name(struct lttng_trigger *trigger, uint64_t unique_id) |
242388e4 JR |
450 | { |
451 | int ret = 0; | |
cd9adb8b | 452 | char *generated_name = nullptr; |
242388e4 | 453 | |
80ea4bfa | 454 | ret = asprintf(&generated_name, "trigger%" PRIu64 "", unique_id); |
242388e4 JR |
455 | if (ret < 0) { |
456 | ERR("Failed to generate trigger name"); | |
457 | ret = -1; | |
458 | goto end; | |
459 | } | |
460 | ||
461 | ret = 0; | |
462 | free(trigger->name); | |
463 | trigger->name = generated_name; | |
464 | end: | |
465 | return ret; | |
466 | } | |
467 | ||
f01d28b4 JR |
468 | void lttng_trigger_get(struct lttng_trigger *trigger) |
469 | { | |
470 | urcu_ref_get(&trigger->ref); | |
471 | } | |
472 | ||
f01d28b4 JR |
473 | void lttng_trigger_put(struct lttng_trigger *trigger) |
474 | { | |
475 | if (!trigger) { | |
476 | return; | |
477 | } | |
478 | ||
28ab034a | 479 | urcu_ref_put(&trigger->ref, trigger_destroy_ref); |
f01d28b4 JR |
480 | } |
481 | ||
a02903c0 JR |
482 | static void delete_trigger_array_element(void *ptr) |
483 | { | |
a6bc4ca9 | 484 | struct lttng_trigger *trigger = (lttng_trigger *) ptr; |
a02903c0 JR |
485 | |
486 | lttng_trigger_put(trigger); | |
487 | } | |
488 | ||
cd9adb8b | 489 | struct lttng_triggers *lttng_triggers_create() |
a02903c0 | 490 | { |
cd9adb8b | 491 | struct lttng_triggers *triggers = nullptr; |
a02903c0 | 492 | |
64803277 | 493 | triggers = zmalloc<lttng_triggers>(); |
a02903c0 JR |
494 | if (!triggers) { |
495 | goto end; | |
496 | } | |
497 | ||
498 | lttng_dynamic_pointer_array_init(&triggers->array, delete_trigger_array_element); | |
499 | ||
500 | end: | |
501 | return triggers; | |
502 | } | |
503 | ||
28ab034a JG |
504 | struct lttng_trigger *lttng_triggers_borrow_mutable_at_index(const struct lttng_triggers *triggers, |
505 | unsigned int index) | |
a02903c0 | 506 | { |
cd9adb8b | 507 | struct lttng_trigger *trigger = nullptr; |
a02903c0 | 508 | |
a0377dfe | 509 | LTTNG_ASSERT(triggers); |
a02903c0 JR |
510 | if (index >= lttng_dynamic_pointer_array_get_count(&triggers->array)) { |
511 | goto end; | |
512 | } | |
513 | ||
28ab034a JG |
514 | trigger = (struct lttng_trigger *) lttng_dynamic_pointer_array_get_pointer(&triggers->array, |
515 | index); | |
a02903c0 JR |
516 | end: |
517 | return trigger; | |
518 | } | |
519 | ||
28ab034a | 520 | int lttng_triggers_add(struct lttng_triggers *triggers, struct lttng_trigger *trigger) |
a02903c0 JR |
521 | { |
522 | int ret; | |
523 | ||
a0377dfe FD |
524 | LTTNG_ASSERT(triggers); |
525 | LTTNG_ASSERT(trigger); | |
a02903c0 JR |
526 | |
527 | lttng_trigger_get(trigger); | |
528 | ||
529 | ret = lttng_dynamic_pointer_array_add_pointer(&triggers->array, trigger); | |
530 | if (ret) { | |
531 | lttng_trigger_put(trigger); | |
532 | } | |
533 | ||
534 | return ret; | |
535 | } | |
536 | ||
f2bda80e JG |
537 | int lttng_triggers_remove_hidden_triggers(struct lttng_triggers *triggers) |
538 | { | |
539 | int ret; | |
540 | unsigned int trigger_count, i = 0; | |
541 | enum lttng_trigger_status trigger_status; | |
542 | ||
a0377dfe | 543 | LTTNG_ASSERT(triggers); |
f2bda80e JG |
544 | |
545 | trigger_status = lttng_triggers_get_count(triggers, &trigger_count); | |
a0377dfe | 546 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
f2bda80e JG |
547 | |
548 | while (i < trigger_count) { | |
28ab034a | 549 | const struct lttng_trigger *trigger = lttng_triggers_get_at_index(triggers, i); |
f2bda80e JG |
550 | |
551 | if (lttng_trigger_is_hidden(trigger)) { | |
28ab034a | 552 | ret = lttng_dynamic_pointer_array_remove_pointer(&triggers->array, i); |
f2bda80e JG |
553 | if (ret) { |
554 | goto end; | |
555 | } | |
556 | ||
557 | trigger_count--; | |
558 | } else { | |
559 | i++; | |
560 | } | |
561 | } | |
562 | ||
563 | ret = 0; | |
564 | end: | |
565 | return ret; | |
566 | } | |
567 | ||
28ab034a JG |
568 | const struct lttng_trigger *lttng_triggers_get_at_index(const struct lttng_triggers *triggers, |
569 | unsigned int index) | |
a02903c0 JR |
570 | { |
571 | return lttng_triggers_borrow_mutable_at_index(triggers, index); | |
572 | } | |
573 | ||
28ab034a JG |
574 | enum lttng_trigger_status lttng_triggers_get_count(const struct lttng_triggers *triggers, |
575 | unsigned int *count) | |
a02903c0 JR |
576 | { |
577 | enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK; | |
578 | ||
579 | if (!triggers || !count) { | |
580 | status = LTTNG_TRIGGER_STATUS_INVALID; | |
581 | goto end; | |
582 | } | |
583 | ||
584 | *count = lttng_dynamic_pointer_array_get_count(&triggers->array); | |
585 | end: | |
586 | return status; | |
587 | } | |
588 | ||
589 | void lttng_triggers_destroy(struct lttng_triggers *triggers) | |
590 | { | |
591 | if (!triggers) { | |
592 | return; | |
593 | } | |
594 | ||
595 | lttng_dynamic_pointer_array_reset(&triggers->array); | |
596 | free(triggers); | |
597 | } | |
598 | ||
28ab034a | 599 | int lttng_triggers_serialize(const struct lttng_triggers *triggers, struct lttng_payload *payload) |
a02903c0 JR |
600 | { |
601 | int ret; | |
602 | unsigned int i, count; | |
603 | size_t size_before_payload; | |
604 | struct lttng_triggers_comm triggers_comm = {}; | |
605 | struct lttng_triggers_comm *header; | |
606 | enum lttng_trigger_status status; | |
607 | const size_t header_offset = payload->buffer.size; | |
608 | ||
609 | status = lttng_triggers_get_count(triggers, &count); | |
610 | if (status != LTTNG_TRIGGER_STATUS_OK) { | |
611 | ret = LTTNG_ERR_INVALID; | |
612 | goto end; | |
613 | } | |
614 | ||
615 | triggers_comm.count = count; | |
616 | ||
617 | /* Placeholder header; updated at the end. */ | |
28ab034a | 618 | ret = lttng_dynamic_buffer_append(&payload->buffer, &triggers_comm, sizeof(triggers_comm)); |
a02903c0 JR |
619 | if (ret) { |
620 | goto end; | |
621 | } | |
622 | ||
623 | size_before_payload = payload->buffer.size; | |
624 | ||
625 | for (i = 0; i < count; i++) { | |
28ab034a | 626 | const struct lttng_trigger *trigger = lttng_triggers_get_at_index(triggers, i); |
a02903c0 | 627 | |
a0377dfe | 628 | LTTNG_ASSERT(trigger); |
a02903c0 JR |
629 | |
630 | ret = lttng_trigger_serialize(trigger, payload); | |
631 | if (ret) { | |
632 | goto end; | |
633 | } | |
634 | } | |
635 | ||
636 | /* Update payload size. */ | |
637 | header = (struct lttng_triggers_comm *) ((char *) payload->buffer.data + header_offset); | |
638 | header->length = payload->buffer.size - size_before_payload; | |
639 | end: | |
640 | return ret; | |
641 | } | |
642 | ||
28ab034a JG |
643 | ssize_t lttng_triggers_create_from_payload(struct lttng_payload_view *src_view, |
644 | struct lttng_triggers **triggers) | |
a02903c0 JR |
645 | { |
646 | ssize_t ret, offset = 0, triggers_size = 0; | |
647 | unsigned int i; | |
648 | const struct lttng_triggers_comm *triggers_comm; | |
cd9adb8b | 649 | struct lttng_triggers *local_triggers = nullptr; |
a02903c0 JR |
650 | |
651 | if (!src_view || !triggers) { | |
652 | ret = -1; | |
653 | goto error; | |
654 | } | |
655 | ||
656 | /* lttng_trigger_comms header */ | |
657 | triggers_comm = (const struct lttng_triggers_comm *) src_view->buffer.data; | |
658 | offset += sizeof(*triggers_comm); | |
659 | ||
660 | local_triggers = lttng_triggers_create(); | |
661 | if (!local_triggers) { | |
662 | ret = -1; | |
663 | goto error; | |
664 | } | |
665 | ||
666 | for (i = 0; i < triggers_comm->count; i++) { | |
cd9adb8b | 667 | struct lttng_trigger *trigger = nullptr; |
a02903c0 | 668 | struct lttng_payload_view trigger_view = |
28ab034a | 669 | lttng_payload_view_from_view(src_view, offset, -1); |
a02903c0 JR |
670 | ssize_t trigger_size; |
671 | ||
28ab034a | 672 | trigger_size = lttng_trigger_create_from_payload(&trigger_view, &trigger); |
a02903c0 JR |
673 | if (trigger_size < 0) { |
674 | ret = trigger_size; | |
675 | goto error; | |
676 | } | |
677 | ||
678 | /* Transfer ownership of the trigger to the collection. */ | |
679 | ret = lttng_triggers_add(local_triggers, trigger); | |
680 | lttng_trigger_put(trigger); | |
681 | if (ret < 0) { | |
682 | ret = -1; | |
683 | goto error; | |
684 | } | |
685 | ||
686 | offset += trigger_size; | |
687 | triggers_size += trigger_size; | |
688 | } | |
689 | ||
690 | /* Unexpected size of inner-elements; the buffer is corrupted. */ | |
691 | if ((ssize_t) triggers_comm->length != triggers_size) { | |
692 | ret = -1; | |
693 | goto error; | |
694 | } | |
695 | ||
696 | /* Pass ownership to caller. */ | |
697 | *triggers = local_triggers; | |
cd9adb8b | 698 | local_triggers = nullptr; |
a02903c0 JR |
699 | |
700 | ret = offset; | |
701 | error: | |
702 | ||
703 | lttng_triggers_destroy(local_triggers); | |
704 | return ret; | |
705 | } | |
706 | ||
28ab034a | 707 | const struct lttng_credentials *lttng_trigger_get_credentials(const struct lttng_trigger *trigger) |
3da864a9 | 708 | { |
64eafdf6 | 709 | return &trigger->creds; |
3da864a9 JR |
710 | } |
711 | ||
64eafdf6 | 712 | void lttng_trigger_set_credentials(struct lttng_trigger *trigger, |
28ab034a | 713 | const struct lttng_credentials *creds) |
3da864a9 | 714 | { |
f4d2c26a | 715 | /* Triggers do not use the group id to authenticate the user. */ |
a0377dfe | 716 | LTTNG_ASSERT(creds); |
f4d2c26a JG |
717 | LTTNG_OPTIONAL_SET(&trigger->creds.uid, LTTNG_OPTIONAL_GET(creds->uid)); |
718 | LTTNG_OPTIONAL_UNSET(&trigger->creds.gid); | |
64eafdf6 JR |
719 | } |
720 | ||
28ab034a | 721 | enum lttng_trigger_status lttng_trigger_set_owner_uid(struct lttng_trigger *trigger, uid_t uid) |
64eafdf6 JR |
722 | { |
723 | enum lttng_trigger_status ret = LTTNG_TRIGGER_STATUS_OK; | |
d84c8ae3 | 724 | const uid_t euid = geteuid(); |
64eafdf6 JR |
725 | const struct lttng_credentials creds = { |
726 | .uid = LTTNG_OPTIONAL_INIT_VALUE(uid), | |
727 | .gid = LTTNG_OPTIONAL_INIT_UNSET, | |
728 | }; | |
729 | ||
730 | if (!trigger) { | |
731 | ret = LTTNG_TRIGGER_STATUS_INVALID; | |
732 | goto end; | |
733 | } | |
734 | ||
735 | /* Client-side validation only to report a clearer error. */ | |
d84c8ae3 | 736 | if (euid != 0 && euid != uid) { |
64eafdf6 JR |
737 | ret = LTTNG_TRIGGER_STATUS_PERMISSION_DENIED; |
738 | goto end; | |
739 | } | |
740 | ||
741 | lttng_trigger_set_credentials(trigger, &creds); | |
742 | ||
743 | end: | |
744 | return ret; | |
745 | } | |
746 | ||
28ab034a JG |
747 | enum lttng_trigger_status lttng_trigger_get_owner_uid(const struct lttng_trigger *trigger, |
748 | uid_t *uid) | |
64eafdf6 JR |
749 | { |
750 | enum lttng_trigger_status ret = LTTNG_TRIGGER_STATUS_OK; | |
cd9adb8b | 751 | const struct lttng_credentials *creds = nullptr; |
64eafdf6 | 752 | |
28ab034a | 753 | if (!trigger || !uid) { |
64eafdf6 JR |
754 | ret = LTTNG_TRIGGER_STATUS_INVALID; |
755 | goto end; | |
756 | } | |
757 | ||
28ab034a | 758 | if (!trigger->creds.uid.is_set) { |
64eafdf6 JR |
759 | ret = LTTNG_TRIGGER_STATUS_UNSET; |
760 | goto end; | |
761 | } | |
762 | ||
763 | creds = lttng_trigger_get_credentials(trigger); | |
764 | *uid = lttng_credentials_get_uid(creds); | |
765 | ||
766 | end: | |
767 | return ret; | |
3da864a9 | 768 | } |
5c504c41 | 769 | |
28ab034a JG |
770 | enum lttng_domain_type |
771 | lttng_trigger_get_underlying_domain_type_restriction(const struct lttng_trigger *trigger) | |
91c96f62 JR |
772 | { |
773 | enum lttng_domain_type type = LTTNG_DOMAIN_NONE; | |
774 | const struct lttng_event_rule *event_rule; | |
775 | enum lttng_condition_status c_status; | |
776 | enum lttng_condition_type c_type; | |
777 | ||
a0377dfe FD |
778 | LTTNG_ASSERT(trigger); |
779 | LTTNG_ASSERT(trigger->condition); | |
91c96f62 JR |
780 | |
781 | c_type = lttng_condition_get_type(trigger->condition); | |
28ab034a | 782 | assert(c_type != LTTNG_CONDITION_TYPE_UNKNOWN); |
91c96f62 JR |
783 | |
784 | switch (c_type) { | |
785 | case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE: | |
786 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING: | |
787 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED: | |
788 | /* Apply to any domain. */ | |
789 | type = LTTNG_DOMAIN_NONE; | |
790 | break; | |
8dbb86b8 | 791 | case LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES: |
91c96f62 | 792 | /* Return the domain of the event rule. */ |
28ab034a JG |
793 | c_status = lttng_condition_event_rule_matches_get_rule(trigger->condition, |
794 | &event_rule); | |
a0377dfe | 795 | LTTNG_ASSERT(c_status == LTTNG_CONDITION_STATUS_OK); |
91c96f62 JR |
796 | type = lttng_event_rule_get_domain_type(event_rule); |
797 | break; | |
798 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH: | |
799 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW: | |
800 | /* Return the domain of the channel being monitored. */ | |
28ab034a | 801 | c_status = lttng_condition_buffer_usage_get_domain_type(trigger->condition, &type); |
a0377dfe | 802 | LTTNG_ASSERT(c_status == LTTNG_CONDITION_STATUS_OK); |
91c96f62 JR |
803 | break; |
804 | default: | |
805 | abort(); | |
806 | } | |
807 | ||
808 | return type; | |
809 | } | |
58daac01 JR |
810 | |
811 | /* | |
812 | * Generate bytecode related to the trigger. | |
813 | * On success LTTNG_OK. On error, returns lttng_error code. | |
814 | */ | |
28ab034a JG |
815 | enum lttng_error_code lttng_trigger_generate_bytecode(struct lttng_trigger *trigger, |
816 | const struct lttng_credentials *creds) | |
58daac01 JR |
817 | { |
818 | enum lttng_error_code ret; | |
cd9adb8b | 819 | struct lttng_condition *condition = nullptr; |
58daac01 JR |
820 | |
821 | condition = lttng_trigger_get_condition(trigger); | |
822 | if (!condition) { | |
823 | ret = LTTNG_ERR_INVALID_TRIGGER; | |
824 | goto end; | |
825 | } | |
826 | ||
827 | switch (lttng_condition_get_type(condition)) { | |
8dbb86b8 | 828 | case LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES: |
58daac01 JR |
829 | { |
830 | struct lttng_event_rule *event_rule; | |
831 | const enum lttng_condition_status condition_status = | |
28ab034a JG |
832 | lttng_condition_event_rule_matches_borrow_rule_mutable(condition, |
833 | &event_rule); | |
58daac01 | 834 | |
a0377dfe | 835 | LTTNG_ASSERT(condition_status == LTTNG_CONDITION_STATUS_OK); |
f2e97f59 JR |
836 | |
837 | /* Generate the filter bytecode. */ | |
28ab034a | 838 | ret = lttng_event_rule_generate_filter_bytecode(event_rule, creds); |
58daac01 JR |
839 | if (ret != LTTNG_OK) { |
840 | goto end; | |
841 | } | |
842 | ||
f2e97f59 | 843 | /* Generate the capture bytecode. */ |
8dbb86b8 | 844 | ret = lttng_condition_event_rule_matches_generate_capture_descriptor_bytecode( |
28ab034a | 845 | condition); |
f2e97f59 JR |
846 | if (ret != LTTNG_OK) { |
847 | goto end; | |
848 | } | |
849 | ||
58daac01 JR |
850 | ret = LTTNG_OK; |
851 | break; | |
852 | } | |
853 | default: | |
854 | ret = LTTNG_OK; | |
855 | break; | |
856 | } | |
857 | end: | |
858 | return ret; | |
859 | } | |
b61776fb | 860 | |
b61776fb SM |
861 | struct lttng_trigger *lttng_trigger_copy(const struct lttng_trigger *trigger) |
862 | { | |
863 | int ret; | |
864 | struct lttng_payload copy_buffer; | |
cd9adb8b JG |
865 | struct lttng_condition *condition_copy = nullptr; |
866 | struct lttng_action *action_copy = nullptr; | |
867 | struct lttng_trigger *copy = nullptr; | |
94dbd8e4 JG |
868 | enum lttng_trigger_status trigger_status; |
869 | const char *trigger_name; | |
870 | uid_t trigger_owner_uid; | |
b61776fb SM |
871 | |
872 | lttng_payload_init(©_buffer); | |
873 | ||
94dbd8e4 | 874 | ret = lttng_condition_serialize(trigger->condition, ©_buffer); |
b61776fb SM |
875 | if (ret < 0) { |
876 | goto end; | |
877 | } | |
878 | ||
879 | { | |
880 | struct lttng_payload_view view = | |
28ab034a | 881 | lttng_payload_view_from_payload(©_buffer, 0, -1); |
94dbd8e4 | 882 | |
28ab034a | 883 | ret = lttng_condition_create_from_payload(&view, &condition_copy); |
94dbd8e4 JG |
884 | if (ret < 0) { |
885 | goto end; | |
886 | } | |
887 | } | |
888 | ||
889 | lttng_payload_clear(©_buffer); | |
890 | ||
891 | ret = lttng_action_serialize(trigger->action, ©_buffer); | |
892 | if (ret < 0) { | |
893 | goto end; | |
894 | } | |
895 | ||
896 | { | |
897 | struct lttng_payload_view view = | |
28ab034a | 898 | lttng_payload_view_from_payload(©_buffer, 0, -1); |
94dbd8e4 | 899 | |
28ab034a | 900 | ret = lttng_action_create_from_payload(&view, &action_copy); |
b61776fb | 901 | if (ret < 0) { |
b61776fb SM |
902 | goto end; |
903 | } | |
904 | } | |
905 | ||
94dbd8e4 JG |
906 | copy = lttng_trigger_create(condition_copy, action_copy); |
907 | if (!copy) { | |
908 | ERR("Failed to allocate trigger during trigger copy"); | |
909 | goto end; | |
910 | } | |
911 | ||
912 | trigger_status = lttng_trigger_get_name(trigger, &trigger_name); | |
913 | switch (trigger_status) { | |
914 | case LTTNG_TRIGGER_STATUS_OK: | |
915 | trigger_status = lttng_trigger_set_name(copy, trigger_name); | |
916 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
917 | ERR("Failed to set name of new trigger during copy"); | |
918 | goto error_cleanup_trigger; | |
919 | } | |
920 | break; | |
921 | case LTTNG_TRIGGER_STATUS_UNSET: | |
922 | break; | |
923 | default: | |
924 | ERR("Failed to get name of original trigger during copy"); | |
925 | goto error_cleanup_trigger; | |
926 | } | |
927 | ||
28ab034a | 928 | trigger_status = lttng_trigger_get_owner_uid(trigger, &trigger_owner_uid); |
94dbd8e4 JG |
929 | switch (trigger_status) { |
930 | case LTTNG_TRIGGER_STATUS_OK: | |
931 | LTTNG_OPTIONAL_SET(©->creds.uid, trigger_owner_uid); | |
932 | break; | |
933 | case LTTNG_TRIGGER_STATUS_UNSET: | |
934 | break; | |
935 | default: | |
936 | ERR("Failed to get owner uid of original trigger during copy"); | |
937 | goto error_cleanup_trigger; | |
938 | } | |
939 | ||
940 | copy->tracer_token = trigger->tracer_token; | |
941 | copy->registered = trigger->registered; | |
f2bda80e | 942 | copy->is_hidden = trigger->is_hidden; |
94dbd8e4 JG |
943 | goto end; |
944 | ||
945 | error_cleanup_trigger: | |
946 | lttng_trigger_destroy(copy); | |
cd9adb8b | 947 | copy = nullptr; |
b61776fb | 948 | end: |
94dbd8e4 JG |
949 | lttng_condition_put(condition_copy); |
950 | lttng_action_put(action_copy); | |
b61776fb SM |
951 | lttng_payload_reset(©_buffer); |
952 | return copy; | |
953 | } | |
c738df17 | 954 | |
c738df17 FD |
955 | bool lttng_trigger_needs_tracer_notifier(const struct lttng_trigger *trigger) |
956 | { | |
957 | bool needs_tracer_notifier = false; | |
28ab034a | 958 | const struct lttng_condition *condition = lttng_trigger_get_const_condition(trigger); |
c738df17 FD |
959 | |
960 | switch (lttng_condition_get_type(condition)) { | |
8dbb86b8 | 961 | case LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES: |
c738df17 FD |
962 | needs_tracer_notifier = true; |
963 | goto end; | |
964 | case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE: | |
965 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH: | |
966 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW: | |
967 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING: | |
968 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED: | |
969 | goto end; | |
970 | case LTTNG_CONDITION_TYPE_UNKNOWN: | |
971 | default: | |
972 | abort(); | |
973 | } | |
974 | end: | |
975 | return needs_tracer_notifier; | |
976 | } | |
9c374932 | 977 | |
9c374932 JR |
978 | void lttng_trigger_set_as_registered(struct lttng_trigger *trigger) |
979 | { | |
980 | pthread_mutex_lock(&trigger->lock); | |
981 | trigger->registered = true; | |
982 | pthread_mutex_unlock(&trigger->lock); | |
983 | } | |
984 | ||
9c374932 JR |
985 | void lttng_trigger_set_as_unregistered(struct lttng_trigger *trigger) |
986 | { | |
987 | pthread_mutex_lock(&trigger->lock); | |
988 | trigger->registered = false; | |
989 | pthread_mutex_unlock(&trigger->lock); | |
990 | } | |
991 | ||
992 | /* | |
993 | * The trigger must be locked before calling lttng_trigger_registered. | |
994 | * The lock is necessary since a trigger can be unregistered at anytime. | |
995 | * Manipulations requiring that the trigger be registered must always acquire | |
996 | * the trigger lock for the duration of the manipulation using | |
997 | * `lttng_trigger_lock` and `lttng_trigger_unlock`. | |
998 | */ | |
9c374932 JR |
999 | bool lttng_trigger_is_registered(struct lttng_trigger *trigger) |
1000 | { | |
1001 | ASSERT_LOCKED(trigger->lock); | |
1002 | return trigger->registered; | |
1003 | } | |
1004 | ||
9c374932 JR |
1005 | void lttng_trigger_lock(struct lttng_trigger *trigger) |
1006 | { | |
1007 | pthread_mutex_lock(&trigger->lock); | |
1008 | } | |
1009 | ||
9c374932 JR |
1010 | void lttng_trigger_unlock(struct lttng_trigger *trigger) |
1011 | { | |
1012 | pthread_mutex_unlock(&trigger->lock); | |
1013 | } | |
6a751b95 | 1014 | |
28ab034a JG |
1015 | enum lttng_error_code |
1016 | lttng_trigger_mi_serialize(const struct lttng_trigger *trigger, | |
1017 | struct mi_writer *writer, | |
1018 | const struct mi_lttng_error_query_callbacks *error_query_callbacks) | |
6a751b95 JR |
1019 | { |
1020 | int ret; | |
1021 | enum lttng_error_code ret_code; | |
1022 | enum lttng_trigger_status trigger_status; | |
cd9adb8b JG |
1023 | const struct lttng_condition *condition = nullptr; |
1024 | const struct lttng_action *action = nullptr; | |
6a751b95 JR |
1025 | struct lttng_dynamic_array action_path_indexes; |
1026 | uid_t owner_uid; | |
1027 | ||
a0377dfe FD |
1028 | LTTNG_ASSERT(trigger); |
1029 | LTTNG_ASSERT(writer); | |
6a751b95 | 1030 | |
cd9adb8b | 1031 | lttng_dynamic_array_init(&action_path_indexes, sizeof(uint64_t), nullptr); |
6a751b95 JR |
1032 | |
1033 | /* Open trigger element. */ | |
1034 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_trigger); | |
1035 | if (ret) { | |
1036 | goto mi_error; | |
1037 | } | |
1038 | ||
1039 | trigger_status = lttng_trigger_get_owner_uid(trigger, &owner_uid); | |
a0377dfe | 1040 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
6a751b95 JR |
1041 | |
1042 | /* Name. */ | |
28ab034a | 1043 | ret = mi_lttng_writer_write_element_string(writer, config_element_name, trigger->name); |
6a751b95 JR |
1044 | if (ret) { |
1045 | goto mi_error; | |
1046 | } | |
1047 | ||
1048 | /* Owner uid. */ | |
28ab034a JG |
1049 | ret = mi_lttng_writer_write_element_signed_int( |
1050 | writer, mi_lttng_element_trigger_owner_uid, (int64_t) owner_uid); | |
6a751b95 JR |
1051 | if (ret) { |
1052 | goto mi_error; | |
1053 | } | |
1054 | ||
1055 | /* Condition. */ | |
1056 | condition = lttng_trigger_get_const_condition(trigger); | |
a0377dfe | 1057 | LTTNG_ASSERT(condition); |
28ab034a | 1058 | ret_code = lttng_condition_mi_serialize(trigger, condition, writer, error_query_callbacks); |
6a751b95 JR |
1059 | if (ret_code != LTTNG_OK) { |
1060 | goto end; | |
1061 | } | |
1062 | ||
1063 | /* Action. */ | |
1064 | action = lttng_trigger_get_const_action(trigger); | |
a0377dfe | 1065 | LTTNG_ASSERT(action); |
28ab034a JG |
1066 | ret_code = lttng_action_mi_serialize( |
1067 | trigger, action, writer, error_query_callbacks, &action_path_indexes); | |
6a751b95 JR |
1068 | if (ret_code != LTTNG_OK) { |
1069 | goto end; | |
1070 | } | |
1071 | ||
1072 | if (error_query_callbacks && error_query_callbacks->trigger_cb) { | |
cd9adb8b | 1073 | struct lttng_error_query_results *results = nullptr; |
6a751b95 JR |
1074 | |
1075 | ret_code = error_query_callbacks->trigger_cb(trigger, &results); | |
1076 | if (ret_code != LTTNG_OK) { | |
1077 | goto end; | |
1078 | } | |
1079 | ||
28ab034a | 1080 | ret_code = lttng_error_query_results_mi_serialize(results, writer); |
6a751b95 JR |
1081 | lttng_error_query_results_destroy(results); |
1082 | if (ret_code != LTTNG_OK) { | |
1083 | goto end; | |
1084 | } | |
1085 | } | |
1086 | ||
1087 | /* Close trigger element. */ | |
1088 | ret = mi_lttng_writer_close_element(writer); | |
1089 | if (ret) { | |
1090 | goto mi_error; | |
1091 | } | |
1092 | ||
1093 | ret_code = LTTNG_OK; | |
1094 | goto end; | |
1095 | ||
1096 | mi_error: | |
1097 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
1098 | end: | |
1099 | lttng_dynamic_array_reset(&action_path_indexes); | |
1100 | return ret_code; | |
1101 | } | |
1102 | ||
1103 | /* Used by qsort, which expects the semantics of strcmp(). */ | |
1104 | static int compare_triggers_by_name(const void *a, const void *b) | |
1105 | { | |
28ab034a JG |
1106 | const struct lttng_trigger *trigger_a = *((const struct lttng_trigger **) a); |
1107 | const struct lttng_trigger *trigger_b = *((const struct lttng_trigger **) b); | |
6a751b95 JR |
1108 | const char *name_a, *name_b; |
1109 | enum lttng_trigger_status trigger_status; | |
1110 | ||
1111 | /* Anonymous triggers are not reachable here. */ | |
1112 | trigger_status = lttng_trigger_get_name(trigger_a, &name_a); | |
a0377dfe | 1113 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
6a751b95 JR |
1114 | |
1115 | trigger_status = lttng_trigger_get_name(trigger_b, &name_b); | |
a0377dfe | 1116 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
6a751b95 JR |
1117 | |
1118 | return strcmp(name_a, name_b); | |
1119 | } | |
1120 | ||
28ab034a JG |
1121 | enum lttng_error_code |
1122 | lttng_triggers_mi_serialize(const struct lttng_triggers *triggers, | |
1123 | struct mi_writer *writer, | |
1124 | const struct mi_lttng_error_query_callbacks *error_query_callbacks) | |
6a751b95 JR |
1125 | { |
1126 | int ret; | |
1127 | enum lttng_error_code ret_code; | |
1128 | enum lttng_trigger_status status; | |
1129 | unsigned int count, i; | |
1130 | struct lttng_dynamic_pointer_array sorted_triggers; | |
1131 | ||
a0377dfe FD |
1132 | LTTNG_ASSERT(triggers); |
1133 | LTTNG_ASSERT(writer); | |
6a751b95 JR |
1134 | |
1135 | /* | |
1136 | * Sort trigger by name to ensure an order at the MI level and ignore | |
1137 | * any anonymous trigger present. | |
1138 | */ | |
cd9adb8b | 1139 | lttng_dynamic_pointer_array_init(&sorted_triggers, nullptr); |
6a751b95 JR |
1140 | |
1141 | status = lttng_triggers_get_count(triggers, &count); | |
a0377dfe | 1142 | LTTNG_ASSERT(status == LTTNG_TRIGGER_STATUS_OK); |
6a751b95 JR |
1143 | |
1144 | for (i = 0; i < count; i++) { | |
1145 | int add_ret; | |
1146 | const char *unused_name; | |
28ab034a | 1147 | const struct lttng_trigger *trigger = lttng_triggers_get_at_index(triggers, i); |
6a751b95 JR |
1148 | |
1149 | status = lttng_trigger_get_name(trigger, &unused_name); | |
1150 | switch (status) { | |
1151 | case LTTNG_TRIGGER_STATUS_OK: | |
1152 | break; | |
1153 | case LTTNG_TRIGGER_STATUS_UNSET: | |
1154 | /* Don't list anonymous triggers. */ | |
1155 | continue; | |
1156 | default: | |
1157 | abort(); | |
1158 | } | |
1159 | ||
28ab034a JG |
1160 | add_ret = |
1161 | lttng_dynamic_pointer_array_add_pointer(&sorted_triggers, (void *) trigger); | |
6a751b95 JR |
1162 | |
1163 | if (add_ret) { | |
1164 | ERR("Failed to lttng_trigger to sorting array."); | |
1165 | ret_code = LTTNG_ERR_NOMEM; | |
1166 | goto error; | |
1167 | } | |
1168 | } | |
1169 | ||
28ab034a JG |
1170 | qsort(sorted_triggers.array.buffer.data, |
1171 | count, | |
1172 | sizeof(struct lttng_trigger *), | |
1173 | compare_triggers_by_name); | |
6a751b95 JR |
1174 | |
1175 | /* Open triggers element. */ | |
1176 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_triggers); | |
1177 | if (ret) { | |
1178 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
1179 | goto error; | |
1180 | } | |
1181 | ||
1182 | for (i = 0; i < lttng_dynamic_pointer_array_get_count(&sorted_triggers); i++) { | |
1183 | const struct lttng_trigger *trigger = | |
28ab034a JG |
1184 | (const struct lttng_trigger *) lttng_dynamic_pointer_array_get_pointer( |
1185 | &sorted_triggers, i); | |
6a751b95 JR |
1186 | |
1187 | lttng_trigger_mi_serialize(trigger, writer, error_query_callbacks); | |
1188 | } | |
1189 | ||
1190 | /* Close triggers element. */ | |
1191 | ret = mi_lttng_writer_close_element(writer); | |
1192 | if (ret) { | |
1193 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
1194 | goto error; | |
1195 | } | |
1196 | ||
1197 | ret_code = LTTNG_OK; | |
1198 | ||
1199 | error: | |
1200 | lttng_dynamic_pointer_array_reset(&sorted_triggers); | |
1201 | return ret_code; | |
1202 | } |