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0a23a07d JR |
1 | /* |
2 | * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com> | |
3 | * | |
4 | * SPDX-License-Identifier: LGPL-2.1-only | |
5 | * | |
6 | */ | |
7 | ||
c9e313bc SM |
8 | #include <common/credentials.hpp> |
9 | #include <common/error.hpp> | |
10 | #include <common/hashtable/hashtable.hpp> | |
11 | #include <common/hashtable/utils.hpp> | |
12 | #include <common/macros.hpp> | |
13 | #include <common/mi-lttng.hpp> | |
14 | #include <common/optional.hpp> | |
15 | #include <common/payload-view.hpp> | |
16 | #include <common/payload.hpp> | |
17 | #include <common/runas.hpp> | |
18 | #include <common/string-utils/string-utils.hpp> | |
28ab034a | 19 | |
c9e313bc SM |
20 | #include <lttng/event-rule/event-rule-internal.hpp> |
21 | #include <lttng/event-rule/user-tracepoint-internal.hpp> | |
0a23a07d | 22 | #include <lttng/event.h> |
6a751b95 | 23 | #include <lttng/log-level-rule.h> |
0a23a07d JR |
24 | |
25 | #define IS_USER_TRACEPOINT_EVENT_RULE(rule) \ | |
26 | (lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT) | |
27 | ||
28 | static void lttng_event_rule_user_tracepoint_destroy(struct lttng_event_rule *rule) | |
29 | { | |
30 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
31 | ||
cd9adb8b | 32 | if (rule == nullptr) { |
0a23a07d JR |
33 | return; |
34 | } | |
35 | ||
28ab034a | 36 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
37 | |
38 | lttng_log_level_rule_destroy(tracepoint->log_level_rule); | |
39 | lttng_dynamic_pointer_array_reset(&tracepoint->exclusions); | |
40 | free(tracepoint->pattern); | |
41 | free(tracepoint->filter_expression); | |
42 | free(tracepoint->internal_filter.filter); | |
43 | free(tracepoint->internal_filter.bytecode); | |
44 | free(tracepoint); | |
45 | } | |
46 | ||
28ab034a | 47 | static bool lttng_event_rule_user_tracepoint_validate(const struct lttng_event_rule *rule) |
0a23a07d JR |
48 | { |
49 | bool valid = false; | |
50 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
51 | ||
52 | if (!rule) { | |
53 | goto end; | |
54 | } | |
55 | ||
28ab034a | 56 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
57 | |
58 | /* Required field. */ | |
59 | if (!tracepoint->pattern) { | |
60 | ERR("Invalid user tracepoint event rule: a pattern must be set."); | |
61 | goto end; | |
62 | } | |
63 | ||
64 | valid = true; | |
65 | end: | |
66 | return valid; | |
67 | } | |
68 | ||
28ab034a JG |
69 | static int lttng_event_rule_user_tracepoint_serialize(const struct lttng_event_rule *rule, |
70 | struct lttng_payload *payload) | |
0a23a07d JR |
71 | { |
72 | int ret, i; | |
73 | size_t pattern_len, filter_expression_len, exclusions_len, header_offset; | |
74 | size_t size_before_log_level_rule; | |
75 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
76 | struct lttng_event_rule_user_tracepoint_comm tracepoint_comm; | |
77 | enum lttng_event_rule_status status; | |
78 | unsigned int exclusion_count; | |
79 | size_t exclusions_appended_len = 0; | |
80 | struct lttng_event_rule_user_tracepoint_comm *header; | |
81 | ||
82 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule)) { | |
83 | ret = -1; | |
84 | goto end; | |
85 | } | |
86 | ||
87 | header_offset = payload->buffer.size; | |
88 | ||
89 | DBG("Serializing user tracepoint event rule."); | |
28ab034a | 90 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d | 91 | |
28ab034a JG |
92 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count( |
93 | rule, &exclusion_count); | |
a0377dfe | 94 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
95 | |
96 | pattern_len = strlen(tracepoint->pattern) + 1; | |
97 | ||
cd9adb8b | 98 | if (tracepoint->filter_expression != nullptr) { |
28ab034a | 99 | filter_expression_len = strlen(tracepoint->filter_expression) + 1; |
0a23a07d JR |
100 | } else { |
101 | filter_expression_len = 0; | |
102 | } | |
103 | ||
104 | exclusions_len = 0; | |
105 | for (i = 0; i < exclusion_count; i++) { | |
106 | const char *exclusion; | |
107 | ||
108 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( | |
28ab034a | 109 | rule, i, &exclusion); |
a0377dfe | 110 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
111 | |
112 | /* Length field. */ | |
113 | exclusions_len += sizeof(uint32_t); | |
114 | /* Payload (null terminated). */ | |
115 | exclusions_len += strlen(exclusion) + 1; | |
116 | } | |
117 | ||
118 | tracepoint_comm.pattern_len = pattern_len; | |
119 | tracepoint_comm.filter_expression_len = filter_expression_len; | |
120 | tracepoint_comm.exclusions_count = exclusion_count; | |
121 | tracepoint_comm.exclusions_len = exclusions_len; | |
122 | ||
28ab034a JG |
123 | ret = lttng_dynamic_buffer_append( |
124 | &payload->buffer, &tracepoint_comm, sizeof(tracepoint_comm)); | |
0a23a07d JR |
125 | if (ret) { |
126 | goto end; | |
127 | } | |
128 | ||
28ab034a | 129 | ret = lttng_dynamic_buffer_append(&payload->buffer, tracepoint->pattern, pattern_len); |
0a23a07d JR |
130 | if (ret) { |
131 | goto end; | |
132 | } | |
133 | ||
28ab034a JG |
134 | ret = lttng_dynamic_buffer_append( |
135 | &payload->buffer, tracepoint->filter_expression, filter_expression_len); | |
0a23a07d JR |
136 | if (ret) { |
137 | goto end; | |
138 | } | |
139 | ||
140 | size_before_log_level_rule = payload->buffer.size; | |
141 | ||
142 | ret = lttng_log_level_rule_serialize(tracepoint->log_level_rule, payload); | |
143 | if (ret < 0) { | |
144 | goto end; | |
145 | } | |
146 | ||
147 | header = (typeof(header)) ((char *) payload->buffer.data + header_offset); | |
28ab034a | 148 | header->log_level_rule_len = payload->buffer.size - size_before_log_level_rule; |
0a23a07d JR |
149 | |
150 | for (i = 0; i < exclusion_count; i++) { | |
151 | size_t len; | |
152 | const char *exclusion; | |
153 | ||
154 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( | |
28ab034a | 155 | rule, i, &exclusion); |
a0377dfe | 156 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
157 | |
158 | len = strlen(exclusion) + 1; | |
159 | /* Append exclusion length, includes the null terminator. */ | |
28ab034a | 160 | ret = lttng_dynamic_buffer_append(&payload->buffer, &len, sizeof(uint32_t)); |
0a23a07d JR |
161 | if (ret) { |
162 | goto end; | |
163 | } | |
164 | ||
165 | exclusions_appended_len += sizeof(uint32_t); | |
166 | ||
167 | /* Include the '\0' in the payload. */ | |
28ab034a | 168 | ret = lttng_dynamic_buffer_append(&payload->buffer, exclusion, len); |
0a23a07d JR |
169 | if (ret) { |
170 | goto end; | |
171 | } | |
172 | ||
173 | exclusions_appended_len += len; | |
174 | } | |
175 | ||
a0377dfe | 176 | LTTNG_ASSERT(exclusions_len == exclusions_appended_len); |
0a23a07d JR |
177 | |
178 | end: | |
179 | return ret; | |
180 | } | |
181 | ||
28ab034a JG |
182 | static bool lttng_event_rule_user_tracepoint_is_equal(const struct lttng_event_rule *_a, |
183 | const struct lttng_event_rule *_b) | |
0a23a07d JR |
184 | { |
185 | int i; | |
186 | bool is_equal = false; | |
187 | struct lttng_event_rule_user_tracepoint *a, *b; | |
188 | unsigned int count_a, count_b; | |
189 | enum lttng_event_rule_status status; | |
190 | ||
0114db0e JG |
191 | a = lttng::utils::container_of(_a, <tng_event_rule_user_tracepoint::parent); |
192 | b = lttng::utils::container_of(_b, <tng_event_rule_user_tracepoint::parent); | |
0a23a07d JR |
193 | |
194 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count(_a, &count_a); | |
a0377dfe | 195 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d | 196 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count(_b, &count_b); |
a0377dfe | 197 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
198 | |
199 | /* Quick checks. */ | |
200 | if (count_a != count_b) { | |
201 | goto end; | |
202 | } | |
203 | ||
204 | if (!!a->filter_expression != !!b->filter_expression) { | |
205 | goto end; | |
206 | } | |
207 | ||
208 | /* Long check. */ | |
a0377dfe FD |
209 | LTTNG_ASSERT(a->pattern); |
210 | LTTNG_ASSERT(b->pattern); | |
5c7248cd | 211 | if (strcmp(a->pattern, b->pattern) != 0) { |
0a23a07d JR |
212 | goto end; |
213 | } | |
214 | ||
215 | if (a->filter_expression && b->filter_expression) { | |
5c7248cd | 216 | if (strcmp(a->filter_expression, b->filter_expression) != 0) { |
0a23a07d JR |
217 | goto end; |
218 | } | |
219 | } else if (!!a->filter_expression != !!b->filter_expression) { | |
220 | /* One is set; not the other. */ | |
221 | goto end; | |
222 | } | |
223 | ||
28ab034a | 224 | if (!lttng_log_level_rule_is_equal(a->log_level_rule, b->log_level_rule)) { |
0a23a07d JR |
225 | goto end; |
226 | } | |
227 | ||
228 | for (i = 0; i < count_a; i++) { | |
229 | const char *exclusion_a, *exclusion_b; | |
230 | ||
231 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( | |
28ab034a | 232 | _a, i, &exclusion_a); |
a0377dfe | 233 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d | 234 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( |
28ab034a | 235 | _b, i, &exclusion_b); |
a0377dfe | 236 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
5c7248cd | 237 | if (strcmp(exclusion_a, exclusion_b) != 0) { |
0a23a07d JR |
238 | goto end; |
239 | } | |
240 | } | |
241 | ||
242 | is_equal = true; | |
243 | end: | |
244 | return is_equal; | |
245 | } | |
246 | ||
247 | static enum lttng_error_code | |
28ab034a JG |
248 | lttng_event_rule_user_tracepoint_generate_filter_bytecode(struct lttng_event_rule *rule, |
249 | const struct lttng_credentials *creds) | |
0a23a07d JR |
250 | { |
251 | int ret; | |
252 | enum lttng_error_code ret_code; | |
253 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
254 | enum lttng_event_rule_status status; | |
255 | const char *filter; | |
cd9adb8b | 256 | struct lttng_bytecode *bytecode = nullptr; |
0a23a07d | 257 | |
a0377dfe | 258 | LTTNG_ASSERT(rule); |
0a23a07d | 259 | |
28ab034a | 260 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
261 | |
262 | status = lttng_event_rule_user_tracepoint_get_filter(rule, &filter); | |
263 | if (status == LTTNG_EVENT_RULE_STATUS_UNSET) { | |
cd9adb8b | 264 | filter = nullptr; |
0a23a07d JR |
265 | } else if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
266 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
267 | goto end; | |
268 | } | |
269 | ||
270 | if (filter && filter[0] == '\0') { | |
271 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
272 | goto error; | |
273 | } | |
274 | ||
275 | if (filter) { | |
276 | tracepoint->internal_filter.filter = strdup(filter); | |
cd9adb8b | 277 | if (tracepoint->internal_filter.filter == nullptr) { |
0a23a07d JR |
278 | ret_code = LTTNG_ERR_NOMEM; |
279 | goto error; | |
280 | } | |
281 | } else { | |
cd9adb8b | 282 | tracepoint->internal_filter.filter = nullptr; |
0a23a07d JR |
283 | } |
284 | ||
cd9adb8b | 285 | if (tracepoint->internal_filter.filter == nullptr) { |
0a23a07d JR |
286 | ret_code = LTTNG_OK; |
287 | goto end; | |
288 | } | |
289 | ||
28ab034a | 290 | ret = run_as_generate_filter_bytecode(tracepoint->internal_filter.filter, creds, &bytecode); |
0a23a07d JR |
291 | if (ret) { |
292 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
293 | goto end; | |
294 | } | |
295 | ||
296 | tracepoint->internal_filter.bytecode = bytecode; | |
cd9adb8b | 297 | bytecode = nullptr; |
0a23a07d JR |
298 | ret_code = LTTNG_OK; |
299 | ||
300 | error: | |
301 | end: | |
302 | free(bytecode); | |
303 | return ret_code; | |
304 | } | |
305 | ||
28ab034a JG |
306 | static const char * |
307 | lttng_event_rule_user_tracepoint_get_internal_filter(const struct lttng_event_rule *rule) | |
0a23a07d JR |
308 | { |
309 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
310 | ||
a0377dfe | 311 | LTTNG_ASSERT(rule); |
28ab034a | 312 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
313 | return tracepoint->internal_filter.filter; |
314 | } | |
315 | ||
316 | static const struct lttng_bytecode * | |
28ab034a | 317 | lttng_event_rule_user_tracepoint_get_internal_filter_bytecode(const struct lttng_event_rule *rule) |
0a23a07d JR |
318 | { |
319 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
320 | ||
a0377dfe | 321 | LTTNG_ASSERT(rule); |
28ab034a | 322 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
323 | return tracepoint->internal_filter.bytecode; |
324 | } | |
325 | ||
326 | static enum lttng_event_rule_generate_exclusions_status | |
28ab034a JG |
327 | lttng_event_rule_user_tracepoint_generate_exclusions(const struct lttng_event_rule *rule, |
328 | struct lttng_event_exclusion **_exclusions) | |
0a23a07d JR |
329 | { |
330 | unsigned int nb_exclusions = 0, i; | |
331 | struct lttng_event_exclusion *exclusions; | |
332 | enum lttng_event_rule_status event_rule_status; | |
333 | enum lttng_event_rule_generate_exclusions_status ret_status; | |
334 | ||
a0377dfe | 335 | LTTNG_ASSERT(_exclusions); |
0a23a07d JR |
336 | |
337 | event_rule_status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count( | |
28ab034a | 338 | rule, &nb_exclusions); |
a0377dfe | 339 | LTTNG_ASSERT(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
340 | if (nb_exclusions == 0) { |
341 | /* Nothing to do. */ | |
cd9adb8b | 342 | exclusions = nullptr; |
0a23a07d JR |
343 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_NONE; |
344 | goto end; | |
345 | } | |
346 | ||
28ab034a JG |
347 | exclusions = zmalloc<lttng_event_exclusion>(sizeof(struct lttng_event_exclusion) + |
348 | (LTTNG_SYMBOL_NAME_LEN * nb_exclusions)); | |
0a23a07d JR |
349 | if (!exclusions) { |
350 | PERROR("Failed to allocate exclusions buffer"); | |
351 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_OUT_OF_MEMORY; | |
352 | goto end; | |
353 | } | |
354 | ||
355 | exclusions->count = nb_exclusions; | |
356 | for (i = 0; i < nb_exclusions; i++) { | |
357 | int copy_ret; | |
358 | const char *exclusion_str; | |
359 | ||
360 | event_rule_status = | |
28ab034a JG |
361 | lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( |
362 | rule, i, &exclusion_str); | |
a0377dfe | 363 | LTTNG_ASSERT(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d | 364 | |
28ab034a JG |
365 | copy_ret = lttng_strncpy(LTTNG_EVENT_EXCLUSION_NAME_AT(exclusions, i), |
366 | exclusion_str, | |
367 | sizeof(LTTNG_EVENT_EXCLUSION_NAME_AT(exclusions, i))); | |
0a23a07d JR |
368 | if (copy_ret) { |
369 | free(exclusions); | |
cd9adb8b | 370 | exclusions = nullptr; |
0a23a07d JR |
371 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_ERROR; |
372 | goto end; | |
373 | } | |
374 | } | |
375 | ||
376 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_OK; | |
377 | ||
378 | end: | |
379 | *_exclusions = exclusions; | |
380 | return ret_status; | |
381 | } | |
382 | ||
383 | static void destroy_lttng_exclusions_element(void *ptr) | |
384 | { | |
385 | free(ptr); | |
386 | } | |
387 | ||
28ab034a | 388 | static unsigned long lttng_event_rule_user_tracepoint_hash(const struct lttng_event_rule *rule) |
0a23a07d JR |
389 | { |
390 | unsigned long hash; | |
391 | unsigned int i, exclusion_count; | |
392 | enum lttng_event_rule_status status; | |
393 | struct lttng_event_rule_user_tracepoint *tp_rule = | |
28ab034a | 394 | lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d | 395 | |
28ab034a | 396 | hash = hash_key_ulong((void *) LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT, lttng_ht_seed); |
0a23a07d JR |
397 | hash ^= hash_key_str(tp_rule->pattern, lttng_ht_seed); |
398 | ||
399 | if (tp_rule->filter_expression) { | |
400 | hash ^= hash_key_str(tp_rule->filter_expression, lttng_ht_seed); | |
401 | } | |
402 | ||
403 | if (tp_rule->log_level_rule) { | |
404 | hash ^= lttng_log_level_rule_hash(tp_rule->log_level_rule); | |
405 | } | |
406 | ||
28ab034a JG |
407 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count( |
408 | rule, &exclusion_count); | |
a0377dfe | 409 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
410 | |
411 | for (i = 0; i < exclusion_count; i++) { | |
412 | const char *exclusion; | |
413 | ||
414 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( | |
28ab034a | 415 | rule, i, &exclusion); |
a0377dfe | 416 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
417 | hash ^= hash_key_str(exclusion, lttng_ht_seed); |
418 | } | |
419 | ||
420 | return hash; | |
421 | } | |
422 | ||
28ab034a JG |
423 | static enum lttng_error_code |
424 | lttng_event_rule_user_tracepoint_mi_serialize(const struct lttng_event_rule *rule, | |
425 | struct mi_writer *writer) | |
6a751b95 JR |
426 | { |
427 | int ret; | |
428 | enum lttng_error_code ret_code; | |
429 | enum lttng_event_rule_status status; | |
cd9adb8b JG |
430 | const char *filter = nullptr; |
431 | const char *name_pattern = nullptr; | |
432 | const struct lttng_log_level_rule *log_level_rule = nullptr; | |
6a751b95 JR |
433 | unsigned int exclusion_count = 0; |
434 | ||
a0377dfe FD |
435 | LTTNG_ASSERT(rule); |
436 | LTTNG_ASSERT(writer); | |
437 | LTTNG_ASSERT(IS_USER_TRACEPOINT_EVENT_RULE(rule)); | |
6a751b95 | 438 | |
28ab034a | 439 | status = lttng_event_rule_user_tracepoint_get_name_pattern(rule, &name_pattern); |
a0377dfe FD |
440 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
441 | LTTNG_ASSERT(name_pattern); | |
6a751b95 JR |
442 | |
443 | status = lttng_event_rule_user_tracepoint_get_filter(rule, &filter); | |
a0377dfe | 444 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK || |
28ab034a | 445 | status == LTTNG_EVENT_RULE_STATUS_UNSET); |
6a751b95 | 446 | |
28ab034a | 447 | status = lttng_event_rule_user_tracepoint_get_log_level_rule(rule, &log_level_rule); |
a0377dfe | 448 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK || |
28ab034a | 449 | status == LTTNG_EVENT_RULE_STATUS_UNSET); |
6a751b95 JR |
450 | |
451 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count( | |
28ab034a | 452 | rule, &exclusion_count); |
a0377dfe | 453 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
6a751b95 JR |
454 | |
455 | /* Open event rule user tracepoint element. */ | |
28ab034a | 456 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_event_rule_user_tracepoint); |
6a751b95 JR |
457 | if (ret) { |
458 | goto mi_error; | |
459 | } | |
460 | ||
461 | /* Name pattern. */ | |
28ab034a JG |
462 | ret = mi_lttng_writer_write_element_string( |
463 | writer, mi_lttng_element_event_rule_name_pattern, name_pattern); | |
6a751b95 JR |
464 | if (ret) { |
465 | goto mi_error; | |
466 | } | |
467 | ||
468 | /* Filter expression. */ | |
cd9adb8b | 469 | if (filter != nullptr) { |
28ab034a JG |
470 | ret = mi_lttng_writer_write_element_string( |
471 | writer, mi_lttng_element_event_rule_filter_expression, filter); | |
6a751b95 JR |
472 | if (ret) { |
473 | goto mi_error; | |
474 | } | |
475 | } | |
476 | ||
477 | /* Log level rule. */ | |
478 | if (log_level_rule) { | |
28ab034a | 479 | ret_code = lttng_log_level_rule_mi_serialize(log_level_rule, writer); |
6a751b95 JR |
480 | if (ret_code != LTTNG_OK) { |
481 | goto end; | |
482 | } | |
483 | } | |
484 | ||
485 | if (exclusion_count != 0) { | |
486 | int i; | |
487 | ||
488 | /* Open the exclusion list. */ | |
28ab034a JG |
489 | ret = mi_lttng_writer_open_element( |
490 | writer, | |
491 | mi_lttng_element_event_rule_user_tracepoint_name_pattern_exclusions); | |
6a751b95 JR |
492 | if (ret) { |
493 | goto mi_error; | |
494 | } | |
495 | ||
496 | for (i = 0; i < exclusion_count; i++) { | |
497 | const char *exclusion; | |
498 | ||
28ab034a JG |
499 | status = |
500 | lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( | |
6a751b95 | 501 | rule, i, &exclusion); |
a0377dfe | 502 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
6a751b95 | 503 | |
28ab034a JG |
504 | ret = mi_lttng_writer_write_element_string( |
505 | writer, | |
506 | mi_lttng_element_event_rule_user_tracepoint_name_pattern_exclusion, | |
507 | exclusion); | |
6a751b95 JR |
508 | if (ret) { |
509 | goto mi_error; | |
510 | } | |
511 | } | |
512 | ||
513 | /* Close the list. */ | |
514 | ret = mi_lttng_writer_close_element(writer); | |
515 | if (ret) { | |
516 | goto mi_error; | |
517 | } | |
518 | } | |
519 | ||
520 | /* Close event rule user tracepoint element. */ | |
521 | ret = mi_lttng_writer_close_element(writer); | |
522 | if (ret) { | |
523 | goto mi_error; | |
524 | } | |
525 | ||
526 | ret_code = LTTNG_OK; | |
527 | goto end; | |
528 | ||
529 | mi_error: | |
530 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
531 | end: | |
532 | return ret_code; | |
533 | } | |
534 | ||
0a23a07d JR |
535 | struct lttng_event_rule *lttng_event_rule_user_tracepoint_create(void) |
536 | { | |
cd9adb8b | 537 | struct lttng_event_rule *rule = nullptr; |
0a23a07d JR |
538 | struct lttng_event_rule_user_tracepoint *tp_rule; |
539 | enum lttng_event_rule_status status; | |
540 | ||
64803277 | 541 | tp_rule = zmalloc<lttng_event_rule_user_tracepoint>(); |
0a23a07d JR |
542 | if (!tp_rule) { |
543 | goto end; | |
544 | } | |
545 | ||
546 | rule = &tp_rule->parent; | |
547 | lttng_event_rule_init(&tp_rule->parent, LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT); | |
548 | tp_rule->parent.validate = lttng_event_rule_user_tracepoint_validate; | |
549 | tp_rule->parent.serialize = lttng_event_rule_user_tracepoint_serialize; | |
550 | tp_rule->parent.equal = lttng_event_rule_user_tracepoint_is_equal; | |
551 | tp_rule->parent.destroy = lttng_event_rule_user_tracepoint_destroy; | |
552 | tp_rule->parent.generate_filter_bytecode = | |
28ab034a JG |
553 | lttng_event_rule_user_tracepoint_generate_filter_bytecode; |
554 | tp_rule->parent.get_filter = lttng_event_rule_user_tracepoint_get_internal_filter; | |
0a23a07d | 555 | tp_rule->parent.get_filter_bytecode = |
28ab034a JG |
556 | lttng_event_rule_user_tracepoint_get_internal_filter_bytecode; |
557 | tp_rule->parent.generate_exclusions = lttng_event_rule_user_tracepoint_generate_exclusions; | |
0a23a07d | 558 | tp_rule->parent.hash = lttng_event_rule_user_tracepoint_hash; |
6a751b95 | 559 | tp_rule->parent.mi_serialize = lttng_event_rule_user_tracepoint_mi_serialize; |
0a23a07d JR |
560 | |
561 | /* Not necessary for now. */ | |
cd9adb8b | 562 | tp_rule->parent.generate_lttng_event = nullptr; |
0a23a07d | 563 | |
cd9adb8b | 564 | tp_rule->log_level_rule = nullptr; |
0a23a07d | 565 | |
28ab034a | 566 | lttng_dynamic_pointer_array_init(&tp_rule->exclusions, destroy_lttng_exclusions_element); |
0a23a07d JR |
567 | |
568 | /* Default pattern is '*'. */ | |
569 | status = lttng_event_rule_user_tracepoint_set_name_pattern(rule, "*"); | |
570 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
571 | lttng_event_rule_destroy(rule); | |
cd9adb8b | 572 | rule = nullptr; |
0a23a07d JR |
573 | } |
574 | ||
575 | end: | |
576 | return rule; | |
577 | } | |
578 | ||
28ab034a JG |
579 | ssize_t lttng_event_rule_user_tracepoint_create_from_payload(struct lttng_payload_view *view, |
580 | struct lttng_event_rule **_event_rule) | |
0a23a07d JR |
581 | { |
582 | ssize_t ret, offset = 0; | |
583 | int i; | |
584 | enum lttng_event_rule_status status; | |
585 | const struct lttng_event_rule_user_tracepoint_comm *tracepoint_comm; | |
586 | const char *pattern; | |
cd9adb8b JG |
587 | const char *filter_expression = nullptr; |
588 | const char **exclusions = nullptr; | |
0a23a07d JR |
589 | const uint32_t *exclusion_len; |
590 | const char *exclusion; | |
591 | struct lttng_buffer_view current_buffer_view; | |
cd9adb8b JG |
592 | struct lttng_event_rule *rule = nullptr; |
593 | struct lttng_log_level_rule *log_level_rule = nullptr; | |
0a23a07d JR |
594 | |
595 | if (!_event_rule) { | |
596 | ret = -1; | |
597 | goto end; | |
598 | } | |
599 | ||
28ab034a JG |
600 | current_buffer_view = |
601 | lttng_buffer_view_from_view(&view->buffer, offset, sizeof(*tracepoint_comm)); | |
0a23a07d JR |
602 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
603 | ERR("Failed to initialize from malformed event rule tracepoint: buffer too short to contain header."); | |
604 | ret = -1; | |
605 | goto end; | |
606 | } | |
607 | ||
608 | tracepoint_comm = (typeof(tracepoint_comm)) current_buffer_view.data; | |
609 | ||
610 | rule = lttng_event_rule_user_tracepoint_create(); | |
611 | if (!rule) { | |
612 | ERR("Failed to create event rule user tracepoint."); | |
613 | ret = -1; | |
614 | goto end; | |
615 | } | |
616 | ||
617 | /* Skip to payload. */ | |
618 | offset += current_buffer_view.size; | |
619 | ||
620 | /* Map the pattern. */ | |
28ab034a JG |
621 | current_buffer_view = |
622 | lttng_buffer_view_from_view(&view->buffer, offset, tracepoint_comm->pattern_len); | |
0a23a07d JR |
623 | |
624 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { | |
625 | ret = -1; | |
626 | goto end; | |
627 | } | |
628 | ||
629 | pattern = current_buffer_view.data; | |
28ab034a JG |
630 | if (!lttng_buffer_view_contains_string( |
631 | ¤t_buffer_view, pattern, tracepoint_comm->pattern_len)) { | |
0a23a07d JR |
632 | ret = -1; |
633 | goto end; | |
634 | } | |
635 | ||
636 | /* Skip after the pattern. */ | |
637 | offset += tracepoint_comm->pattern_len; | |
638 | ||
639 | if (!tracepoint_comm->filter_expression_len) { | |
640 | goto skip_filter_expression; | |
641 | } | |
642 | ||
643 | /* Map the filter_expression. */ | |
28ab034a JG |
644 | current_buffer_view = lttng_buffer_view_from_view( |
645 | &view->buffer, offset, tracepoint_comm->filter_expression_len); | |
0a23a07d JR |
646 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
647 | ret = -1; | |
648 | goto end; | |
649 | } | |
650 | ||
651 | filter_expression = current_buffer_view.data; | |
652 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, | |
28ab034a JG |
653 | filter_expression, |
654 | tracepoint_comm->filter_expression_len)) { | |
0a23a07d JR |
655 | ret = -1; |
656 | goto end; | |
657 | } | |
658 | ||
659 | /* Skip after the pattern. */ | |
660 | offset += tracepoint_comm->filter_expression_len; | |
661 | ||
662 | skip_filter_expression: | |
663 | if (!tracepoint_comm->log_level_rule_len) { | |
664 | goto skip_log_level_rule; | |
665 | } | |
666 | ||
667 | { | |
668 | /* Map the log level rule. */ | |
28ab034a JG |
669 | struct lttng_payload_view current_payload_view = lttng_payload_view_from_view( |
670 | view, offset, tracepoint_comm->log_level_rule_len); | |
0a23a07d | 671 | |
28ab034a JG |
672 | ret = lttng_log_level_rule_create_from_payload(¤t_payload_view, |
673 | &log_level_rule); | |
0a23a07d JR |
674 | if (ret < 0) { |
675 | ret = -1; | |
676 | goto end; | |
677 | } | |
678 | ||
a0377dfe | 679 | LTTNG_ASSERT(ret == tracepoint_comm->log_level_rule_len); |
0a23a07d JR |
680 | } |
681 | ||
682 | /* Skip after the log level rule. */ | |
683 | offset += tracepoint_comm->log_level_rule_len; | |
684 | ||
685 | skip_log_level_rule: | |
686 | for (i = 0; i < tracepoint_comm->exclusions_count; i++) { | |
28ab034a JG |
687 | current_buffer_view = |
688 | lttng_buffer_view_from_view(&view->buffer, offset, sizeof(*exclusion_len)); | |
0a23a07d JR |
689 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
690 | ret = -1; | |
691 | goto end; | |
692 | } | |
693 | ||
694 | exclusion_len = (typeof(exclusion_len)) current_buffer_view.data; | |
695 | offset += sizeof(*exclusion_len); | |
696 | ||
28ab034a JG |
697 | current_buffer_view = |
698 | lttng_buffer_view_from_view(&view->buffer, offset, *exclusion_len); | |
0a23a07d JR |
699 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
700 | ret = -1; | |
701 | goto end; | |
702 | } | |
703 | ||
704 | exclusion = current_buffer_view.data; | |
28ab034a JG |
705 | if (!lttng_buffer_view_contains_string( |
706 | ¤t_buffer_view, exclusion, *exclusion_len)) { | |
0a23a07d JR |
707 | ret = -1; |
708 | goto end; | |
709 | } | |
710 | ||
28ab034a JG |
711 | status = lttng_event_rule_user_tracepoint_add_name_pattern_exclusion(rule, |
712 | exclusion); | |
0a23a07d JR |
713 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
714 | ERR("Failed to add event rule user tracepoint exclusion \"%s\".", | |
28ab034a | 715 | exclusion); |
0a23a07d JR |
716 | ret = -1; |
717 | goto end; | |
718 | } | |
719 | ||
720 | /* Skip to next exclusion. */ | |
721 | offset += *exclusion_len; | |
722 | } | |
723 | ||
724 | status = lttng_event_rule_user_tracepoint_set_name_pattern(rule, pattern); | |
725 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
726 | ERR("Failed to set event rule user tracepoint pattern."); | |
727 | ret = -1; | |
728 | goto end; | |
729 | } | |
730 | ||
731 | if (filter_expression) { | |
28ab034a | 732 | status = lttng_event_rule_user_tracepoint_set_filter(rule, filter_expression); |
0a23a07d JR |
733 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
734 | ERR("Failed to set event rule user tracepoint pattern."); | |
735 | ret = -1; | |
736 | goto end; | |
737 | } | |
738 | } | |
739 | ||
740 | if (log_level_rule) { | |
28ab034a | 741 | status = lttng_event_rule_user_tracepoint_set_log_level_rule(rule, log_level_rule); |
0a23a07d JR |
742 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
743 | ERR("Failed to set event rule user tracepoint log level rule."); | |
744 | ret = -1; | |
745 | goto end; | |
746 | } | |
747 | } | |
748 | ||
749 | *_event_rule = rule; | |
cd9adb8b | 750 | rule = nullptr; |
0a23a07d JR |
751 | ret = offset; |
752 | end: | |
753 | free(exclusions); | |
754 | lttng_log_level_rule_destroy(log_level_rule); | |
755 | lttng_event_rule_destroy(rule); | |
756 | return ret; | |
757 | } | |
758 | ||
28ab034a JG |
759 | enum lttng_event_rule_status |
760 | lttng_event_rule_user_tracepoint_set_name_pattern(struct lttng_event_rule *rule, | |
761 | const char *pattern) | |
0a23a07d | 762 | { |
cd9adb8b | 763 | char *pattern_copy = nullptr; |
0a23a07d JR |
764 | struct lttng_event_rule_user_tracepoint *tracepoint; |
765 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
766 | ||
28ab034a | 767 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !pattern || strlen(pattern) == 0) { |
0a23a07d JR |
768 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
769 | goto end; | |
770 | } | |
771 | ||
28ab034a | 772 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
773 | pattern_copy = strdup(pattern); |
774 | if (!pattern_copy) { | |
775 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
776 | goto end; | |
777 | } | |
778 | ||
779 | /* Normalize the pattern. */ | |
780 | strutils_normalize_star_glob_pattern(pattern_copy); | |
781 | ||
782 | free(tracepoint->pattern); | |
783 | ||
784 | tracepoint->pattern = pattern_copy; | |
cd9adb8b | 785 | pattern_copy = nullptr; |
0a23a07d JR |
786 | end: |
787 | return status; | |
788 | } | |
789 | ||
28ab034a JG |
790 | enum lttng_event_rule_status |
791 | lttng_event_rule_user_tracepoint_get_name_pattern(const struct lttng_event_rule *rule, | |
792 | const char **pattern) | |
0a23a07d JR |
793 | { |
794 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
795 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
796 | ||
797 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !pattern) { | |
798 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
799 | goto end; | |
800 | } | |
801 | ||
28ab034a | 802 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
803 | if (!tracepoint->pattern) { |
804 | status = LTTNG_EVENT_RULE_STATUS_UNSET; | |
805 | goto end; | |
806 | } | |
807 | ||
808 | *pattern = tracepoint->pattern; | |
809 | end: | |
810 | return status; | |
811 | } | |
812 | ||
28ab034a JG |
813 | enum lttng_event_rule_status |
814 | lttng_event_rule_user_tracepoint_set_filter(struct lttng_event_rule *rule, const char *expression) | |
0a23a07d | 815 | { |
cd9adb8b | 816 | char *expression_copy = nullptr; |
0a23a07d JR |
817 | struct lttng_event_rule_user_tracepoint *tracepoint; |
818 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
819 | ||
820 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !expression || | |
28ab034a | 821 | strlen(expression) == 0) { |
0a23a07d JR |
822 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
823 | goto end; | |
824 | } | |
825 | ||
28ab034a | 826 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
827 | expression_copy = strdup(expression); |
828 | if (!expression_copy) { | |
829 | PERROR("Failed to copy filter expression"); | |
830 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
831 | goto end; | |
832 | } | |
833 | ||
834 | if (tracepoint->filter_expression) { | |
835 | free(tracepoint->filter_expression); | |
836 | } | |
837 | ||
838 | tracepoint->filter_expression = expression_copy; | |
cd9adb8b | 839 | expression_copy = nullptr; |
0a23a07d JR |
840 | end: |
841 | return status; | |
842 | } | |
843 | ||
28ab034a JG |
844 | enum lttng_event_rule_status |
845 | lttng_event_rule_user_tracepoint_get_filter(const struct lttng_event_rule *rule, | |
846 | const char **expression) | |
0a23a07d JR |
847 | { |
848 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
849 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
850 | ||
851 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !expression) { | |
852 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
853 | goto end; | |
854 | } | |
855 | ||
28ab034a | 856 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
857 | if (!tracepoint->filter_expression) { |
858 | status = LTTNG_EVENT_RULE_STATUS_UNSET; | |
859 | goto end; | |
860 | } | |
861 | ||
862 | *expression = tracepoint->filter_expression; | |
863 | end: | |
864 | return status; | |
865 | } | |
866 | ||
867 | static bool log_level_rule_valid(const struct lttng_log_level_rule *rule) | |
868 | { | |
869 | bool valid = false; | |
870 | enum lttng_log_level_rule_status status; | |
871 | int level; | |
872 | ||
873 | switch (lttng_log_level_rule_get_type(rule)) { | |
874 | case LTTNG_LOG_LEVEL_RULE_TYPE_EXACTLY: | |
875 | status = lttng_log_level_rule_exactly_get_level(rule, &level); | |
876 | break; | |
877 | case LTTNG_LOG_LEVEL_RULE_TYPE_AT_LEAST_AS_SEVERE_AS: | |
28ab034a | 878 | status = lttng_log_level_rule_at_least_as_severe_as_get_level(rule, &level); |
0a23a07d JR |
879 | break; |
880 | default: | |
881 | abort(); | |
882 | } | |
883 | ||
a0377dfe | 884 | LTTNG_ASSERT(status == LTTNG_LOG_LEVEL_RULE_STATUS_OK); |
0a23a07d JR |
885 | |
886 | if (level < LTTNG_LOGLEVEL_EMERG) { | |
887 | /* Invalid. */ | |
888 | goto end; | |
889 | } | |
890 | if (level > LTTNG_LOGLEVEL_DEBUG) { | |
891 | /* Invalid. */ | |
892 | goto end; | |
893 | } | |
894 | ||
895 | valid = true; | |
896 | ||
897 | end: | |
898 | return valid; | |
899 | } | |
900 | ||
901 | enum lttng_event_rule_status lttng_event_rule_user_tracepoint_set_log_level_rule( | |
28ab034a | 902 | struct lttng_event_rule *rule, const struct lttng_log_level_rule *log_level_rule) |
0a23a07d JR |
903 | { |
904 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
905 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
cd9adb8b | 906 | struct lttng_log_level_rule *copy = nullptr; |
0a23a07d JR |
907 | |
908 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule)) { | |
909 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
910 | goto end; | |
911 | } | |
912 | ||
28ab034a | 913 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
914 | |
915 | if (!log_level_rule_valid(log_level_rule)) { | |
916 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
917 | goto end; | |
918 | } | |
919 | ||
920 | copy = lttng_log_level_rule_copy(log_level_rule); | |
cd9adb8b | 921 | if (copy == nullptr) { |
0a23a07d JR |
922 | status = LTTNG_EVENT_RULE_STATUS_ERROR; |
923 | goto end; | |
924 | } | |
925 | ||
926 | if (tracepoint->log_level_rule) { | |
927 | lttng_log_level_rule_destroy(tracepoint->log_level_rule); | |
928 | } | |
929 | ||
930 | tracepoint->log_level_rule = copy; | |
931 | ||
932 | end: | |
933 | return status; | |
934 | } | |
935 | ||
936 | enum lttng_event_rule_status lttng_event_rule_user_tracepoint_get_log_level_rule( | |
28ab034a | 937 | const struct lttng_event_rule *rule, const struct lttng_log_level_rule **log_level_rule) |
0a23a07d JR |
938 | { |
939 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
940 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
941 | ||
942 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !log_level_rule) { | |
943 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
944 | goto end; | |
945 | } | |
946 | ||
28ab034a | 947 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
cd9adb8b | 948 | if (tracepoint->log_level_rule == nullptr) { |
0a23a07d JR |
949 | status = LTTNG_EVENT_RULE_STATUS_UNSET; |
950 | goto end; | |
951 | } | |
952 | ||
953 | *log_level_rule = tracepoint->log_level_rule; | |
954 | end: | |
955 | return status; | |
956 | } | |
957 | ||
28ab034a JG |
958 | enum lttng_event_rule_status |
959 | lttng_event_rule_user_tracepoint_add_name_pattern_exclusion(struct lttng_event_rule *rule, | |
960 | const char *exclusion) | |
0a23a07d JR |
961 | { |
962 | int ret; | |
cd9adb8b | 963 | char *exclusion_copy = nullptr; |
0a23a07d JR |
964 | struct lttng_event_rule_user_tracepoint *tracepoint; |
965 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
966 | ||
28ab034a | 967 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !exclusion) { |
0a23a07d JR |
968 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
969 | goto end; | |
970 | } | |
971 | ||
28ab034a | 972 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
973 | |
974 | if (strlen(exclusion) >= LTTNG_SYMBOL_NAME_LEN) { | |
975 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
976 | goto end; | |
977 | } | |
978 | ||
979 | exclusion_copy = strdup(exclusion); | |
980 | if (!exclusion_copy) { | |
981 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
982 | goto end; | |
983 | } | |
984 | ||
28ab034a | 985 | ret = lttng_dynamic_pointer_array_add_pointer(&tracepoint->exclusions, exclusion_copy); |
0a23a07d JR |
986 | if (ret < 0) { |
987 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
988 | goto end; | |
989 | } | |
990 | ||
cd9adb8b | 991 | exclusion_copy = nullptr; |
0a23a07d JR |
992 | end: |
993 | free(exclusion_copy); | |
994 | return status; | |
995 | } | |
996 | ||
997 | enum lttng_event_rule_status lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count( | |
28ab034a | 998 | const struct lttng_event_rule *rule, unsigned int *count) |
0a23a07d JR |
999 | { |
1000 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
1001 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1002 | ||
1003 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !count) { | |
1004 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1005 | goto end; | |
1006 | } | |
1007 | ||
28ab034a | 1008 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
1009 | *count = lttng_dynamic_pointer_array_get_count(&tracepoint->exclusions); |
1010 | end: | |
1011 | return status; | |
1012 | } | |
1013 | ||
1014 | enum lttng_event_rule_status lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( | |
28ab034a | 1015 | const struct lttng_event_rule *rule, unsigned int index, const char **exclusion) |
0a23a07d JR |
1016 | { |
1017 | unsigned int count; | |
1018 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
1019 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1020 | ||
1021 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !exclusion) { | |
1022 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1023 | goto end; | |
1024 | } | |
1025 | ||
28ab034a | 1026 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d | 1027 | if (lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count(rule, &count) != |
28ab034a | 1028 | LTTNG_EVENT_RULE_STATUS_OK) { |
0a23a07d JR |
1029 | goto end; |
1030 | } | |
1031 | ||
1032 | if (index >= count) { | |
1033 | goto end; | |
1034 | } | |
1035 | ||
28ab034a JG |
1036 | *exclusion = (const char *) lttng_dynamic_pointer_array_get_pointer(&tracepoint->exclusions, |
1037 | index); | |
0a23a07d JR |
1038 | end: |
1039 | return status; | |
1040 | } |