| 1 | /* |
| 2 | * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com> |
| 3 | * |
| 4 | * SPDX-License-Identifier: LGPL-2.1-only |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #include <assert.h> |
| 9 | #include <common/error.h> |
| 10 | #include <common/macros.h> |
| 11 | #include <common/payload.h> |
| 12 | #include <common/payload-view.h> |
| 13 | #include <common/runas.h> |
| 14 | #include <lttng/event-rule/event-rule-internal.h> |
| 15 | #include <lttng/event-rule/tracepoint-internal.h> |
| 16 | #include <lttng/event.h> |
| 17 | |
| 18 | #define IS_TRACEPOINT_EVENT_RULE(rule) \ |
| 19 | (lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_TRACEPOINT) |
| 20 | |
| 21 | static void lttng_event_rule_tracepoint_destroy(struct lttng_event_rule *rule) |
| 22 | { |
| 23 | struct lttng_event_rule_tracepoint *tracepoint; |
| 24 | |
| 25 | if (rule == NULL) { |
| 26 | return; |
| 27 | } |
| 28 | |
| 29 | tracepoint = container_of( |
| 30 | rule, struct lttng_event_rule_tracepoint, parent); |
| 31 | |
| 32 | lttng_dynamic_pointer_array_reset(&tracepoint->exclusions); |
| 33 | free(tracepoint->pattern); |
| 34 | free(tracepoint->filter_expression); |
| 35 | free(tracepoint->internal_filter.filter); |
| 36 | free(tracepoint->internal_filter.bytecode); |
| 37 | free(tracepoint); |
| 38 | } |
| 39 | |
| 40 | static bool lttng_event_rule_tracepoint_validate( |
| 41 | const struct lttng_event_rule *rule) |
| 42 | { |
| 43 | bool valid = false; |
| 44 | struct lttng_event_rule_tracepoint *tracepoint; |
| 45 | |
| 46 | if (!rule) { |
| 47 | goto end; |
| 48 | } |
| 49 | |
| 50 | tracepoint = container_of( |
| 51 | rule, struct lttng_event_rule_tracepoint, parent); |
| 52 | |
| 53 | /* Required field. */ |
| 54 | if (!tracepoint->pattern) { |
| 55 | ERR("Invalid tracepoint event rule: a pattern must be set."); |
| 56 | goto end; |
| 57 | } |
| 58 | |
| 59 | /* Required field. */ |
| 60 | if (tracepoint->domain == LTTNG_DOMAIN_NONE) { |
| 61 | ERR("Invalid tracepoint event rule: a domain must be set."); |
| 62 | goto end; |
| 63 | } |
| 64 | |
| 65 | valid = true; |
| 66 | end: |
| 67 | return valid; |
| 68 | } |
| 69 | |
| 70 | static int lttng_event_rule_tracepoint_serialize( |
| 71 | const struct lttng_event_rule *rule, |
| 72 | struct lttng_payload *payload) |
| 73 | { |
| 74 | int ret, i; |
| 75 | size_t pattern_len, filter_expression_len, exclusions_len; |
| 76 | struct lttng_event_rule_tracepoint *tracepoint; |
| 77 | struct lttng_event_rule_tracepoint_comm tracepoint_comm; |
| 78 | enum lttng_event_rule_status status; |
| 79 | unsigned int exclusion_count; |
| 80 | size_t exclusions_appended_len = 0; |
| 81 | |
| 82 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) { |
| 83 | ret = -1; |
| 84 | goto end; |
| 85 | } |
| 86 | |
| 87 | DBG("Serializing tracepoint event rule."); |
| 88 | tracepoint = container_of( |
| 89 | rule, struct lttng_event_rule_tracepoint, parent); |
| 90 | |
| 91 | status = lttng_event_rule_tracepoint_get_exclusions_count(rule, &exclusion_count); |
| 92 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); |
| 93 | |
| 94 | pattern_len = strlen(tracepoint->pattern) + 1; |
| 95 | |
| 96 | if (tracepoint->filter_expression != NULL) { |
| 97 | filter_expression_len = |
| 98 | strlen(tracepoint->filter_expression) + 1; |
| 99 | } else { |
| 100 | filter_expression_len = 0; |
| 101 | } |
| 102 | |
| 103 | exclusions_len = 0; |
| 104 | for (i = 0; i < exclusion_count; i++) { |
| 105 | const char *exclusion; |
| 106 | |
| 107 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( |
| 108 | rule, i, &exclusion); |
| 109 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); |
| 110 | |
| 111 | /* Length field. */ |
| 112 | exclusions_len += sizeof(uint32_t); |
| 113 | /* Payload (null terminated). */ |
| 114 | exclusions_len += strlen(exclusion) + 1; |
| 115 | } |
| 116 | |
| 117 | tracepoint_comm.domain_type = (int8_t) tracepoint->domain; |
| 118 | tracepoint_comm.loglevel_type = (int8_t) tracepoint->loglevel.type; |
| 119 | tracepoint_comm.loglevel_value = tracepoint->loglevel.value; |
| 120 | tracepoint_comm.pattern_len = pattern_len; |
| 121 | tracepoint_comm.filter_expression_len = filter_expression_len; |
| 122 | tracepoint_comm.exclusions_count = exclusion_count; |
| 123 | tracepoint_comm.exclusions_len = exclusions_len; |
| 124 | |
| 125 | ret = lttng_dynamic_buffer_append(&payload->buffer, &tracepoint_comm, |
| 126 | sizeof(tracepoint_comm)); |
| 127 | if (ret) { |
| 128 | goto end; |
| 129 | } |
| 130 | |
| 131 | ret = lttng_dynamic_buffer_append( |
| 132 | &payload->buffer, tracepoint->pattern, pattern_len); |
| 133 | if (ret) { |
| 134 | goto end; |
| 135 | } |
| 136 | |
| 137 | ret = lttng_dynamic_buffer_append(&payload->buffer, tracepoint->filter_expression, |
| 138 | filter_expression_len); |
| 139 | if (ret) { |
| 140 | goto end; |
| 141 | } |
| 142 | |
| 143 | for (i = 0; i < exclusion_count; i++) { |
| 144 | size_t len; |
| 145 | const char *exclusion; |
| 146 | |
| 147 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( |
| 148 | rule, i, &exclusion); |
| 149 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); |
| 150 | |
| 151 | len = strlen(exclusion) + 1; |
| 152 | /* Append exclusion length, includes the null terminator. */ |
| 153 | ret = lttng_dynamic_buffer_append( |
| 154 | &payload->buffer, &len, sizeof(uint32_t)); |
| 155 | if (ret) { |
| 156 | goto end; |
| 157 | } |
| 158 | |
| 159 | exclusions_appended_len += sizeof(uint32_t); |
| 160 | |
| 161 | /* Include the '\0' in the payload. */ |
| 162 | ret = lttng_dynamic_buffer_append( |
| 163 | &payload->buffer, exclusion, len); |
| 164 | if (ret) { |
| 165 | goto end; |
| 166 | } |
| 167 | |
| 168 | exclusions_appended_len += len; |
| 169 | } |
| 170 | |
| 171 | assert(exclusions_len == exclusions_appended_len); |
| 172 | |
| 173 | end: |
| 174 | return ret; |
| 175 | } |
| 176 | |
| 177 | static bool lttng_event_rule_tracepoint_is_equal( |
| 178 | const struct lttng_event_rule *_a, |
| 179 | const struct lttng_event_rule *_b) |
| 180 | { |
| 181 | int i; |
| 182 | bool is_equal = false; |
| 183 | struct lttng_event_rule_tracepoint *a, *b; |
| 184 | unsigned int count_a, count_b; |
| 185 | enum lttng_event_rule_status status; |
| 186 | |
| 187 | a = container_of(_a, struct lttng_event_rule_tracepoint, parent); |
| 188 | b = container_of(_b, struct lttng_event_rule_tracepoint, parent); |
| 189 | |
| 190 | status = lttng_event_rule_tracepoint_get_exclusions_count(_a, &count_a); |
| 191 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); |
| 192 | status = lttng_event_rule_tracepoint_get_exclusions_count(_b, &count_b); |
| 193 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); |
| 194 | |
| 195 | /* Quick checks. */ |
| 196 | if (a->domain != b->domain) { |
| 197 | goto end; |
| 198 | } |
| 199 | |
| 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. */ |
| 209 | assert(a->pattern); |
| 210 | assert(b->pattern); |
| 211 | if (strcmp(a->pattern, b->pattern)) { |
| 212 | goto end; |
| 213 | } |
| 214 | |
| 215 | if (a->filter_expression && b->filter_expression) { |
| 216 | if (strcmp(a->filter_expression, b->filter_expression)) { |
| 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 | |
| 224 | if (a->loglevel.type != b->loglevel.type) { |
| 225 | goto end; |
| 226 | } |
| 227 | |
| 228 | if (a->loglevel.value != b->loglevel.value) { |
| 229 | goto end; |
| 230 | } |
| 231 | |
| 232 | for (i = 0; i < count_a; i++) { |
| 233 | const char *exclusion_a, *exclusion_b; |
| 234 | |
| 235 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( |
| 236 | _a, i, &exclusion_a); |
| 237 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); |
| 238 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( |
| 239 | _b, i, &exclusion_b); |
| 240 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); |
| 241 | if (strcmp(exclusion_a, exclusion_b)) { |
| 242 | goto end; |
| 243 | } |
| 244 | } |
| 245 | |
| 246 | is_equal = true; |
| 247 | end: |
| 248 | return is_equal; |
| 249 | } |
| 250 | |
| 251 | /* |
| 252 | * On success ret is 0; |
| 253 | * |
| 254 | * On error ret is negative. |
| 255 | * |
| 256 | * An event with NO loglevel and the name is * will return NULL. |
| 257 | */ |
| 258 | static int generate_agent_filter( |
| 259 | const struct lttng_event_rule *rule, char **_agent_filter) |
| 260 | { |
| 261 | int err; |
| 262 | int ret = 0; |
| 263 | char *agent_filter = NULL; |
| 264 | const char *pattern; |
| 265 | const char *filter; |
| 266 | enum lttng_loglevel_type loglevel_type; |
| 267 | enum lttng_event_rule_status status; |
| 268 | |
| 269 | assert(rule); |
| 270 | assert(_agent_filter); |
| 271 | |
| 272 | status = lttng_event_rule_tracepoint_get_pattern(rule, &pattern); |
| 273 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 274 | ret = -1; |
| 275 | goto end; |
| 276 | } |
| 277 | |
| 278 | status = lttng_event_rule_tracepoint_get_filter(rule, &filter); |
| 279 | if (status == LTTNG_EVENT_RULE_STATUS_UNSET) { |
| 280 | filter = NULL; |
| 281 | } else if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 282 | ret = -1; |
| 283 | goto end; |
| 284 | } |
| 285 | |
| 286 | status = lttng_event_rule_tracepoint_get_log_level_type( |
| 287 | rule, &loglevel_type); |
| 288 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 289 | ret = -1; |
| 290 | goto end; |
| 291 | } |
| 292 | |
| 293 | /* Don't add filter for the '*' event. */ |
| 294 | if (strcmp(pattern, "*") != 0) { |
| 295 | if (filter) { |
| 296 | err = asprintf(&agent_filter, |
| 297 | "(%s) && (logger_name == \"%s\")", |
| 298 | filter, pattern); |
| 299 | } else { |
| 300 | err = asprintf(&agent_filter, "logger_name == \"%s\"", |
| 301 | pattern); |
| 302 | } |
| 303 | |
| 304 | if (err < 0) { |
| 305 | PERROR("Failed to format agent filter string"); |
| 306 | ret = -1; |
| 307 | goto end; |
| 308 | } |
| 309 | } |
| 310 | |
| 311 | if (loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { |
| 312 | const char *op; |
| 313 | int loglevel_value; |
| 314 | |
| 315 | status = lttng_event_rule_tracepoint_get_log_level( |
| 316 | rule, &loglevel_value); |
| 317 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 318 | ret = -1; |
| 319 | goto end; |
| 320 | } |
| 321 | |
| 322 | if (loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { |
| 323 | op = ">="; |
| 324 | } else { |
| 325 | op = "=="; |
| 326 | } |
| 327 | |
| 328 | if (filter || agent_filter) { |
| 329 | char *new_filter; |
| 330 | |
| 331 | err = asprintf(&new_filter, |
| 332 | "(%s) && (int_loglevel %s %d)", |
| 333 | agent_filter ? agent_filter : filter, |
| 334 | op, loglevel_value); |
| 335 | if (agent_filter) { |
| 336 | free(agent_filter); |
| 337 | } |
| 338 | agent_filter = new_filter; |
| 339 | } else { |
| 340 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, |
| 341 | loglevel_value); |
| 342 | } |
| 343 | |
| 344 | if (err < 0) { |
| 345 | PERROR("Failed to format agent filter string"); |
| 346 | ret = -1; |
| 347 | goto end; |
| 348 | } |
| 349 | } |
| 350 | |
| 351 | *_agent_filter = agent_filter; |
| 352 | agent_filter = NULL; |
| 353 | |
| 354 | end: |
| 355 | free(agent_filter); |
| 356 | return ret; |
| 357 | } |
| 358 | |
| 359 | static enum lttng_error_code |
| 360 | lttng_event_rule_tracepoint_generate_filter_bytecode( |
| 361 | struct lttng_event_rule *rule, uid_t uid, gid_t gid) |
| 362 | { |
| 363 | int ret; |
| 364 | enum lttng_error_code ret_code; |
| 365 | struct lttng_event_rule_tracepoint *tracepoint; |
| 366 | enum lttng_domain_type domain_type; |
| 367 | enum lttng_event_rule_status status; |
| 368 | const char *filter; |
| 369 | struct lttng_bytecode *bytecode = NULL; |
| 370 | |
| 371 | assert(rule); |
| 372 | |
| 373 | tracepoint = container_of( |
| 374 | rule, struct lttng_event_rule_tracepoint, parent); |
| 375 | |
| 376 | status = lttng_event_rule_tracepoint_get_filter(rule, &filter); |
| 377 | if (status == LTTNG_EVENT_RULE_STATUS_UNSET) { |
| 378 | filter = NULL; |
| 379 | } else if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 380 | ret_code = LTTNG_ERR_FILTER_INVAL; |
| 381 | goto end; |
| 382 | } |
| 383 | |
| 384 | if (filter && filter[0] == '\0') { |
| 385 | ret_code = LTTNG_ERR_FILTER_INVAL; |
| 386 | goto error; |
| 387 | } |
| 388 | |
| 389 | status = lttng_event_rule_tracepoint_get_domain_type( |
| 390 | rule, &domain_type); |
| 391 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 392 | ret_code = LTTNG_ERR_UNK; |
| 393 | goto error; |
| 394 | } |
| 395 | |
| 396 | switch (domain_type) { |
| 397 | case LTTNG_DOMAIN_LOG4J: |
| 398 | case LTTNG_DOMAIN_JUL: |
| 399 | case LTTNG_DOMAIN_PYTHON: |
| 400 | { |
| 401 | char *agent_filter; |
| 402 | |
| 403 | ret = generate_agent_filter(rule, &agent_filter); |
| 404 | if (ret) { |
| 405 | ret_code = LTTNG_ERR_FILTER_INVAL; |
| 406 | goto error; |
| 407 | } |
| 408 | |
| 409 | tracepoint->internal_filter.filter = agent_filter; |
| 410 | break; |
| 411 | } |
| 412 | default: |
| 413 | { |
| 414 | if (filter) { |
| 415 | tracepoint->internal_filter.filter = strdup(filter); |
| 416 | if (tracepoint->internal_filter.filter == NULL) { |
| 417 | ret_code = LTTNG_ERR_NOMEM; |
| 418 | goto error; |
| 419 | } |
| 420 | } else { |
| 421 | tracepoint->internal_filter.filter = NULL; |
| 422 | } |
| 423 | break; |
| 424 | } |
| 425 | } |
| 426 | |
| 427 | if (tracepoint->internal_filter.filter == NULL) { |
| 428 | ret_code = LTTNG_OK; |
| 429 | goto end; |
| 430 | } |
| 431 | |
| 432 | ret = run_as_generate_filter_bytecode( |
| 433 | tracepoint->internal_filter.filter, uid, gid, |
| 434 | &bytecode); |
| 435 | if (ret) { |
| 436 | ret_code = LTTNG_ERR_FILTER_INVAL; |
| 437 | goto end; |
| 438 | } |
| 439 | |
| 440 | tracepoint->internal_filter.bytecode = bytecode; |
| 441 | bytecode = NULL; |
| 442 | ret_code = LTTNG_OK; |
| 443 | |
| 444 | error: |
| 445 | end: |
| 446 | free(bytecode); |
| 447 | return ret_code; |
| 448 | } |
| 449 | |
| 450 | static const char *lttng_event_rule_tracepoint_get_internal_filter( |
| 451 | const struct lttng_event_rule *rule) |
| 452 | { |
| 453 | struct lttng_event_rule_tracepoint *tracepoint; |
| 454 | |
| 455 | assert(rule); |
| 456 | tracepoint = container_of( |
| 457 | rule, struct lttng_event_rule_tracepoint, parent); |
| 458 | return tracepoint->internal_filter.filter; |
| 459 | } |
| 460 | |
| 461 | static const struct lttng_bytecode * |
| 462 | lttng_event_rule_tracepoint_get_internal_filter_bytecode( |
| 463 | const struct lttng_event_rule *rule) |
| 464 | { |
| 465 | struct lttng_event_rule_tracepoint *tracepoint; |
| 466 | |
| 467 | assert(rule); |
| 468 | tracepoint = container_of( |
| 469 | rule, struct lttng_event_rule_tracepoint, parent); |
| 470 | return tracepoint->internal_filter.bytecode; |
| 471 | } |
| 472 | |
| 473 | static struct lttng_event_exclusion * |
| 474 | lttng_event_rule_tracepoint_generate_exclusions( |
| 475 | const struct lttng_event_rule *rule) |
| 476 | { |
| 477 | enum lttng_domain_type domain_type = LTTNG_DOMAIN_NONE; |
| 478 | enum lttng_event_rule_status status; |
| 479 | struct lttng_event_exclusion *local_exclusions = NULL; |
| 480 | struct lttng_event_exclusion *ret_exclusions = NULL; |
| 481 | unsigned int nb_exclusions = 0; |
| 482 | unsigned int i; |
| 483 | |
| 484 | status = lttng_event_rule_tracepoint_get_domain_type(rule, &domain_type); |
| 485 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); |
| 486 | |
| 487 | switch (domain_type) { |
| 488 | case LTTNG_DOMAIN_KERNEL: |
| 489 | case LTTNG_DOMAIN_JUL: |
| 490 | case LTTNG_DOMAIN_LOG4J: |
| 491 | case LTTNG_DOMAIN_PYTHON: |
| 492 | /* Not supported. */ |
| 493 | ret_exclusions = NULL; |
| 494 | goto end; |
| 495 | case LTTNG_DOMAIN_UST: |
| 496 | /* Exclusions supported. */ |
| 497 | break; |
| 498 | default: |
| 499 | abort(); |
| 500 | } |
| 501 | |
| 502 | status = lttng_event_rule_tracepoint_get_exclusions_count( |
| 503 | rule, &nb_exclusions); |
| 504 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); |
| 505 | if (nb_exclusions == 0) { |
| 506 | /* Nothing to do. */ |
| 507 | ret_exclusions = NULL; |
| 508 | goto end; |
| 509 | } |
| 510 | |
| 511 | local_exclusions = zmalloc(sizeof(struct lttng_event_exclusion) + |
| 512 | (LTTNG_SYMBOL_NAME_LEN * nb_exclusions)); |
| 513 | if (!local_exclusions) { |
| 514 | PERROR("Failed to allocate exclusions buffer"); |
| 515 | ret_exclusions = NULL; |
| 516 | goto end; |
| 517 | } |
| 518 | |
| 519 | local_exclusions->count = nb_exclusions; |
| 520 | for (i = 0; i < nb_exclusions; i++) { |
| 521 | /* Truncation is already checked at the setter level. */ |
| 522 | const char *tmp; |
| 523 | |
| 524 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( |
| 525 | rule, i, &tmp); |
| 526 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); |
| 527 | strncpy(local_exclusions->names[i], tmp, LTTNG_SYMBOL_NAME_LEN); |
| 528 | local_exclusions->names[i][LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
| 529 | } |
| 530 | |
| 531 | /* Pass ownership. */ |
| 532 | ret_exclusions = local_exclusions; |
| 533 | local_exclusions = NULL; |
| 534 | end: |
| 535 | free(local_exclusions); |
| 536 | return ret_exclusions; |
| 537 | } |
| 538 | |
| 539 | static void destroy_lttng_exclusions_element(void *ptr) |
| 540 | { |
| 541 | free(ptr); |
| 542 | } |
| 543 | |
| 544 | static struct lttng_event *lttng_event_rule_tracepoint_generate_lttng_event( |
| 545 | const struct lttng_event_rule *rule) |
| 546 | { |
| 547 | const struct lttng_event_rule_tracepoint *tracepoint; |
| 548 | struct lttng_event *local_event = NULL; |
| 549 | struct lttng_event *event = NULL; |
| 550 | |
| 551 | tracepoint = container_of( |
| 552 | rule, const struct lttng_event_rule_tracepoint, parent); |
| 553 | |
| 554 | local_event = zmalloc(sizeof(*local_event)); |
| 555 | if (!local_event) { |
| 556 | goto error; |
| 557 | } |
| 558 | |
| 559 | local_event->type = LTTNG_EVENT_TRACEPOINT; |
| 560 | (void) strncpy(local_event->name, tracepoint->pattern, |
| 561 | sizeof(local_event->name) - 1); |
| 562 | local_event->name[sizeof(local_event->name) - 1] = '\0'; |
| 563 | local_event->loglevel_type = tracepoint->loglevel.type; |
| 564 | local_event->loglevel = tracepoint->loglevel.value; |
| 565 | |
| 566 | event = local_event; |
| 567 | local_event = NULL; |
| 568 | error: |
| 569 | free(local_event); |
| 570 | return event; |
| 571 | } |
| 572 | |
| 573 | struct lttng_event_rule *lttng_event_rule_tracepoint_create( |
| 574 | enum lttng_domain_type domain_type) |
| 575 | { |
| 576 | struct lttng_event_rule *rule = NULL; |
| 577 | struct lttng_event_rule_tracepoint *tp_rule; |
| 578 | |
| 579 | if (domain_type == LTTNG_DOMAIN_NONE) { |
| 580 | goto end; |
| 581 | } |
| 582 | |
| 583 | tp_rule = zmalloc(sizeof(struct lttng_event_rule_tracepoint)); |
| 584 | if (!tp_rule) { |
| 585 | goto end; |
| 586 | } |
| 587 | |
| 588 | rule = &tp_rule->parent; |
| 589 | lttng_event_rule_init(&tp_rule->parent, LTTNG_EVENT_RULE_TYPE_TRACEPOINT); |
| 590 | tp_rule->parent.validate = lttng_event_rule_tracepoint_validate; |
| 591 | tp_rule->parent.serialize = lttng_event_rule_tracepoint_serialize; |
| 592 | tp_rule->parent.equal = lttng_event_rule_tracepoint_is_equal; |
| 593 | tp_rule->parent.destroy = lttng_event_rule_tracepoint_destroy; |
| 594 | tp_rule->parent.generate_filter_bytecode = |
| 595 | lttng_event_rule_tracepoint_generate_filter_bytecode; |
| 596 | tp_rule->parent.get_filter = |
| 597 | lttng_event_rule_tracepoint_get_internal_filter; |
| 598 | tp_rule->parent.get_filter_bytecode = |
| 599 | lttng_event_rule_tracepoint_get_internal_filter_bytecode; |
| 600 | tp_rule->parent.generate_exclusions = |
| 601 | lttng_event_rule_tracepoint_generate_exclusions; |
| 602 | tp_rule->parent.generate_lttng_event = |
| 603 | lttng_event_rule_tracepoint_generate_lttng_event; |
| 604 | |
| 605 | tp_rule->domain = domain_type; |
| 606 | tp_rule->loglevel.type = LTTNG_EVENT_LOGLEVEL_ALL; |
| 607 | |
| 608 | lttng_dynamic_pointer_array_init(&tp_rule->exclusions, |
| 609 | destroy_lttng_exclusions_element); |
| 610 | end: |
| 611 | return rule; |
| 612 | } |
| 613 | |
| 614 | LTTNG_HIDDEN |
| 615 | ssize_t lttng_event_rule_tracepoint_create_from_payload( |
| 616 | struct lttng_payload_view *view, |
| 617 | struct lttng_event_rule **_event_rule) |
| 618 | { |
| 619 | ssize_t ret, offset = 0; |
| 620 | int i; |
| 621 | enum lttng_event_rule_status status; |
| 622 | enum lttng_domain_type domain_type; |
| 623 | enum lttng_loglevel_type loglevel_type; |
| 624 | const struct lttng_event_rule_tracepoint_comm *tracepoint_comm; |
| 625 | const char *pattern; |
| 626 | const char *filter_expression = NULL; |
| 627 | const char **exclusions = NULL; |
| 628 | const uint32_t *exclusion_len; |
| 629 | const char *exclusion; |
| 630 | struct lttng_buffer_view current_buffer_view; |
| 631 | struct lttng_event_rule *rule = NULL; |
| 632 | |
| 633 | if (!_event_rule) { |
| 634 | ret = -1; |
| 635 | goto end; |
| 636 | } |
| 637 | |
| 638 | if (view->buffer.size < sizeof(*tracepoint_comm)) { |
| 639 | ERR("Failed to initialize from malformed event rule tracepoint: buffer too short to contain header."); |
| 640 | ret = -1; |
| 641 | goto end; |
| 642 | } |
| 643 | |
| 644 | current_buffer_view = lttng_buffer_view_from_view( |
| 645 | &view->buffer, offset, sizeof(*tracepoint_comm)); |
| 646 | tracepoint_comm = (typeof(tracepoint_comm)) current_buffer_view.data; |
| 647 | |
| 648 | if (!tracepoint_comm) { |
| 649 | ret = -1; |
| 650 | goto end; |
| 651 | } |
| 652 | |
| 653 | if (tracepoint_comm->domain_type <= LTTNG_DOMAIN_NONE || |
| 654 | tracepoint_comm->domain_type > LTTNG_DOMAIN_PYTHON) { |
| 655 | /* Invalid domain value. */ |
| 656 | ERR("Invalid domain type value (%i) found in tracepoint_comm buffer.", |
| 657 | (int) tracepoint_comm->domain_type); |
| 658 | ret = -1; |
| 659 | goto end; |
| 660 | } |
| 661 | |
| 662 | domain_type = (enum lttng_domain_type) tracepoint_comm->domain_type; |
| 663 | rule = lttng_event_rule_tracepoint_create(domain_type); |
| 664 | if (!rule) { |
| 665 | ERR("Failed to create event rule tracepoint."); |
| 666 | ret = -1; |
| 667 | goto end; |
| 668 | } |
| 669 | |
| 670 | loglevel_type = (enum lttng_loglevel_type) |
| 671 | tracepoint_comm->loglevel_type; |
| 672 | switch (loglevel_type) { |
| 673 | case LTTNG_EVENT_LOGLEVEL_ALL: |
| 674 | status = lttng_event_rule_tracepoint_set_log_level_all(rule); |
| 675 | break; |
| 676 | case LTTNG_EVENT_LOGLEVEL_RANGE: |
| 677 | status = lttng_event_rule_tracepoint_set_log_level_range_lower_bound(rule, |
| 678 | (enum lttng_loglevel_type) tracepoint_comm |
| 679 | ->loglevel_value); |
| 680 | break; |
| 681 | case LTTNG_EVENT_LOGLEVEL_SINGLE: |
| 682 | status = lttng_event_rule_tracepoint_set_log_level(rule, |
| 683 | (enum lttng_loglevel_type) tracepoint_comm |
| 684 | ->loglevel_value); |
| 685 | break; |
| 686 | default: |
| 687 | ERR("Failed to set event rule tracepoint loglevel: unknown loglevel type."); |
| 688 | ret = -1; |
| 689 | goto end; |
| 690 | } |
| 691 | |
| 692 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 693 | ERR("Failed to set event rule tracepoint loglevel."); |
| 694 | } |
| 695 | |
| 696 | /* Skip to payload. */ |
| 697 | offset += current_buffer_view.size; |
| 698 | |
| 699 | /* Map the pattern. */ |
| 700 | current_buffer_view = lttng_buffer_view_from_view( |
| 701 | &view->buffer, offset, tracepoint_comm->pattern_len); |
| 702 | pattern = current_buffer_view.data; |
| 703 | if (!pattern) { |
| 704 | ret = -1; |
| 705 | goto end; |
| 706 | } |
| 707 | |
| 708 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, pattern, |
| 709 | tracepoint_comm->pattern_len)) { |
| 710 | ret = -1; |
| 711 | goto end; |
| 712 | } |
| 713 | |
| 714 | /* Skip after the pattern. */ |
| 715 | offset += tracepoint_comm->pattern_len; |
| 716 | |
| 717 | if (!tracepoint_comm->filter_expression_len) { |
| 718 | goto skip_filter_expression; |
| 719 | } |
| 720 | |
| 721 | /* Map the filter_expression. */ |
| 722 | current_buffer_view = lttng_buffer_view_from_view(&view->buffer, offset, |
| 723 | tracepoint_comm->filter_expression_len); |
| 724 | filter_expression = current_buffer_view.data; |
| 725 | if (!filter_expression) { |
| 726 | ret = -1; |
| 727 | goto end; |
| 728 | } |
| 729 | |
| 730 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, |
| 731 | filter_expression, |
| 732 | tracepoint_comm->filter_expression_len)) { |
| 733 | ret = -1; |
| 734 | goto end; |
| 735 | } |
| 736 | |
| 737 | /* Skip after the pattern. */ |
| 738 | offset += tracepoint_comm->filter_expression_len; |
| 739 | |
| 740 | skip_filter_expression: |
| 741 | for (i = 0; i < tracepoint_comm->exclusions_count; i++) { |
| 742 | current_buffer_view = lttng_buffer_view_from_view( |
| 743 | &view->buffer, offset, sizeof(*exclusion_len)); |
| 744 | exclusion_len = (typeof(exclusion_len)) current_buffer_view.data; |
| 745 | if (!exclusion_len) { |
| 746 | ret = -1; |
| 747 | goto end; |
| 748 | } |
| 749 | |
| 750 | offset += sizeof(*exclusion_len); |
| 751 | current_buffer_view = lttng_buffer_view_from_view( |
| 752 | &view->buffer, offset, *exclusion_len); |
| 753 | exclusion = current_buffer_view.data; |
| 754 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, |
| 755 | exclusion, *exclusion_len)) { |
| 756 | ret = -1; |
| 757 | goto end; |
| 758 | } |
| 759 | |
| 760 | status = lttng_event_rule_tracepoint_add_exclusion(rule, exclusion); |
| 761 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 762 | ERR("Failed to add event rule tracepoint exclusion \"%s\".", |
| 763 | exclusion); |
| 764 | ret = -1; |
| 765 | goto end; |
| 766 | } |
| 767 | |
| 768 | /* Skip to next exclusion. */ |
| 769 | offset += *exclusion_len; |
| 770 | } |
| 771 | |
| 772 | status = lttng_event_rule_tracepoint_set_pattern(rule, pattern); |
| 773 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 774 | ERR("Failed to set event rule tracepoint pattern."); |
| 775 | ret = -1; |
| 776 | goto end; |
| 777 | } |
| 778 | |
| 779 | if (filter_expression) { |
| 780 | status = lttng_event_rule_tracepoint_set_filter( |
| 781 | rule, filter_expression); |
| 782 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 783 | ERR("Failed to set event rule tracepoint pattern."); |
| 784 | ret = -1; |
| 785 | goto end; |
| 786 | } |
| 787 | } |
| 788 | |
| 789 | *_event_rule = rule; |
| 790 | rule = NULL; |
| 791 | ret = offset; |
| 792 | end: |
| 793 | free(exclusions); |
| 794 | lttng_event_rule_destroy(rule); |
| 795 | return ret; |
| 796 | } |
| 797 | |
| 798 | enum lttng_event_rule_status lttng_event_rule_tracepoint_set_pattern( |
| 799 | struct lttng_event_rule *rule, const char *pattern) |
| 800 | { |
| 801 | char *pattern_copy = NULL; |
| 802 | struct lttng_event_rule_tracepoint *tracepoint; |
| 803 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; |
| 804 | |
| 805 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !pattern || |
| 806 | strlen(pattern) == 0) { |
| 807 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
| 808 | goto end; |
| 809 | } |
| 810 | |
| 811 | tracepoint = container_of( |
| 812 | rule, struct lttng_event_rule_tracepoint, parent); |
| 813 | pattern_copy = strdup(pattern); |
| 814 | if (!pattern_copy) { |
| 815 | status = LTTNG_EVENT_RULE_STATUS_ERROR; |
| 816 | goto end; |
| 817 | } |
| 818 | |
| 819 | free(tracepoint->pattern); |
| 820 | |
| 821 | tracepoint->pattern = pattern_copy; |
| 822 | pattern_copy = NULL; |
| 823 | end: |
| 824 | return status; |
| 825 | } |
| 826 | |
| 827 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_pattern( |
| 828 | const struct lttng_event_rule *rule, const char **pattern) |
| 829 | { |
| 830 | struct lttng_event_rule_tracepoint *tracepoint; |
| 831 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; |
| 832 | |
| 833 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !pattern) { |
| 834 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
| 835 | goto end; |
| 836 | } |
| 837 | |
| 838 | tracepoint = container_of( |
| 839 | rule, struct lttng_event_rule_tracepoint, parent); |
| 840 | if (!tracepoint->pattern) { |
| 841 | status = LTTNG_EVENT_RULE_STATUS_UNSET; |
| 842 | goto end; |
| 843 | } |
| 844 | |
| 845 | *pattern = tracepoint->pattern; |
| 846 | end: |
| 847 | return status; |
| 848 | } |
| 849 | |
| 850 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_domain_type( |
| 851 | const struct lttng_event_rule *rule, |
| 852 | enum lttng_domain_type *type) |
| 853 | { |
| 854 | struct lttng_event_rule_tracepoint *tracepoint; |
| 855 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; |
| 856 | |
| 857 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !type) { |
| 858 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
| 859 | goto end; |
| 860 | } |
| 861 | |
| 862 | tracepoint = container_of( |
| 863 | rule, struct lttng_event_rule_tracepoint, parent); |
| 864 | *type = tracepoint->domain; |
| 865 | end: |
| 866 | return status; |
| 867 | } |
| 868 | |
| 869 | enum lttng_event_rule_status lttng_event_rule_tracepoint_set_filter( |
| 870 | struct lttng_event_rule *rule, const char *expression) |
| 871 | { |
| 872 | char *expression_copy = NULL; |
| 873 | struct lttng_event_rule_tracepoint *tracepoint; |
| 874 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; |
| 875 | |
| 876 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !expression || |
| 877 | strlen(expression) == 0) { |
| 878 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
| 879 | goto end; |
| 880 | } |
| 881 | |
| 882 | tracepoint = container_of( |
| 883 | rule, struct lttng_event_rule_tracepoint, parent); |
| 884 | expression_copy = strdup(expression); |
| 885 | if (!expression_copy) { |
| 886 | PERROR("Failed to copy filter expression"); |
| 887 | status = LTTNG_EVENT_RULE_STATUS_ERROR; |
| 888 | goto end; |
| 889 | } |
| 890 | |
| 891 | if (tracepoint->filter_expression) { |
| 892 | free(tracepoint->filter_expression); |
| 893 | } |
| 894 | |
| 895 | tracepoint->filter_expression = expression_copy; |
| 896 | expression_copy = NULL; |
| 897 | end: |
| 898 | return status; |
| 899 | } |
| 900 | |
| 901 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_filter( |
| 902 | const struct lttng_event_rule *rule, const char **expression) |
| 903 | { |
| 904 | struct lttng_event_rule_tracepoint *tracepoint; |
| 905 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; |
| 906 | |
| 907 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !expression) { |
| 908 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
| 909 | goto end; |
| 910 | } |
| 911 | |
| 912 | tracepoint = container_of( |
| 913 | rule, struct lttng_event_rule_tracepoint, parent); |
| 914 | if (!tracepoint->filter_expression) { |
| 915 | status = LTTNG_EVENT_RULE_STATUS_UNSET; |
| 916 | goto end; |
| 917 | } |
| 918 | |
| 919 | *expression = tracepoint->filter_expression; |
| 920 | end: |
| 921 | return status; |
| 922 | } |
| 923 | |
| 924 | static bool log_level_value_valid( |
| 925 | int level, enum lttng_domain_type domain) |
| 926 | { |
| 927 | bool valid = false; |
| 928 | |
| 929 | switch (domain) { |
| 930 | case LTTNG_DOMAIN_KERNEL: |
| 931 | case LTTNG_DOMAIN_UST: |
| 932 | if (level < LTTNG_LOGLEVEL_EMERG) { |
| 933 | /* Invalid. */ |
| 934 | goto end; |
| 935 | } |
| 936 | if (level > LTTNG_LOGLEVEL_DEBUG) { |
| 937 | /* Invalid. */ |
| 938 | goto end; |
| 939 | } |
| 940 | |
| 941 | valid = true; |
| 942 | break; |
| 943 | case LTTNG_DOMAIN_JUL: |
| 944 | case LTTNG_DOMAIN_LOG4J: |
| 945 | case LTTNG_DOMAIN_PYTHON: |
| 946 | /* |
| 947 | * For both JUL and LOG4J custom log level are possible and can |
| 948 | * spawn the entire int32 range. |
| 949 | * For python, custom log level are possible, it is not clear if |
| 950 | * negative value are accepted (NOTSET == 0) but the source code |
| 951 | * validate against the int type implying that negative values |
| 952 | * are accepted. |
| 953 | */ |
| 954 | valid = true; |
| 955 | goto end; |
| 956 | |
| 957 | case LTTNG_DOMAIN_NONE: |
| 958 | default: |
| 959 | abort(); |
| 960 | } |
| 961 | |
| 962 | end: |
| 963 | return valid; |
| 964 | } |
| 965 | |
| 966 | enum lttng_event_rule_status lttng_event_rule_tracepoint_set_log_level( |
| 967 | struct lttng_event_rule *rule, int level) |
| 968 | { |
| 969 | struct lttng_event_rule_tracepoint *tracepoint; |
| 970 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; |
| 971 | |
| 972 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) { |
| 973 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
| 974 | goto end; |
| 975 | } |
| 976 | |
| 977 | tracepoint = container_of( |
| 978 | rule, struct lttng_event_rule_tracepoint, parent); |
| 979 | |
| 980 | if (!log_level_value_valid(level, tracepoint->domain)) { |
| 981 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
| 982 | goto end; |
| 983 | } |
| 984 | |
| 985 | tracepoint->loglevel.value = level; |
| 986 | tracepoint->loglevel.type = LTTNG_EVENT_LOGLEVEL_SINGLE; |
| 987 | end: |
| 988 | return status; |
| 989 | } |
| 990 | |
| 991 | enum lttng_event_rule_status |
| 992 | lttng_event_rule_tracepoint_set_log_level_range_lower_bound( |
| 993 | struct lttng_event_rule *rule, int level) |
| 994 | { |
| 995 | struct lttng_event_rule_tracepoint *tracepoint; |
| 996 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; |
| 997 | |
| 998 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) { |
| 999 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
| 1000 | goto end; |
| 1001 | } |
| 1002 | |
| 1003 | tracepoint = container_of( |
| 1004 | rule, struct lttng_event_rule_tracepoint, parent); |
| 1005 | |
| 1006 | if (!log_level_value_valid(level, tracepoint->domain)) { |
| 1007 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
| 1008 | goto end; |
| 1009 | } |
| 1010 | |
| 1011 | tracepoint->loglevel.value = level; |
| 1012 | tracepoint->loglevel.type = LTTNG_EVENT_LOGLEVEL_RANGE; |
| 1013 | end: |
| 1014 | return status; |
| 1015 | } |
| 1016 | |
| 1017 | enum lttng_event_rule_status lttng_event_rule_tracepoint_set_log_level_all( |
| 1018 | struct lttng_event_rule *rule) |
| 1019 | { |
| 1020 | struct lttng_event_rule_tracepoint *tracepoint; |
| 1021 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; |
| 1022 | |
| 1023 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) { |
| 1024 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
| 1025 | goto end; |
| 1026 | } |
| 1027 | |
| 1028 | tracepoint = container_of( |
| 1029 | rule, struct lttng_event_rule_tracepoint, parent); |
| 1030 | tracepoint->loglevel.type = LTTNG_EVENT_LOGLEVEL_ALL; |
| 1031 | end: |
| 1032 | return status; |
| 1033 | } |
| 1034 | |
| 1035 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_log_level_type( |
| 1036 | const struct lttng_event_rule *rule, |
| 1037 | enum lttng_loglevel_type *type) |
| 1038 | { |
| 1039 | struct lttng_event_rule_tracepoint *tracepoint; |
| 1040 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; |
| 1041 | |
| 1042 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !type) { |
| 1043 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
| 1044 | goto end; |
| 1045 | } |
| 1046 | |
| 1047 | tracepoint = container_of( |
| 1048 | rule, struct lttng_event_rule_tracepoint, parent); |
| 1049 | *type = tracepoint->loglevel.type; |
| 1050 | end: |
| 1051 | return status; |
| 1052 | } |
| 1053 | |
| 1054 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_log_level( |
| 1055 | const struct lttng_event_rule *rule, int *level) |
| 1056 | { |
| 1057 | struct lttng_event_rule_tracepoint *tracepoint; |
| 1058 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; |
| 1059 | |
| 1060 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !level) { |
| 1061 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
| 1062 | goto end; |
| 1063 | } |
| 1064 | |
| 1065 | tracepoint = container_of( |
| 1066 | rule, struct lttng_event_rule_tracepoint, parent); |
| 1067 | if (tracepoint->loglevel.type == LTTNG_EVENT_LOGLEVEL_ALL) { |
| 1068 | status = LTTNG_EVENT_RULE_STATUS_UNSET; |
| 1069 | goto end; |
| 1070 | } |
| 1071 | |
| 1072 | *level = tracepoint->loglevel.value; |
| 1073 | end: |
| 1074 | return status; |
| 1075 | } |
| 1076 | |
| 1077 | enum lttng_event_rule_status lttng_event_rule_tracepoint_add_exclusion( |
| 1078 | struct lttng_event_rule *rule, |
| 1079 | const char *exclusion) |
| 1080 | { |
| 1081 | int ret; |
| 1082 | char *exclusion_copy = NULL; |
| 1083 | struct lttng_event_rule_tracepoint *tracepoint; |
| 1084 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; |
| 1085 | enum lttng_domain_type domain_type; |
| 1086 | |
| 1087 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || |
| 1088 | !exclusion) { |
| 1089 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
| 1090 | goto end; |
| 1091 | } |
| 1092 | |
| 1093 | tracepoint = container_of( |
| 1094 | rule, struct lttng_event_rule_tracepoint, parent); |
| 1095 | |
| 1096 | status = lttng_event_rule_tracepoint_get_domain_type( |
| 1097 | rule, &domain_type); |
| 1098 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 1099 | goto end; |
| 1100 | } |
| 1101 | |
| 1102 | switch (domain_type) { |
| 1103 | case LTTNG_DOMAIN_KERNEL: |
| 1104 | case LTTNG_DOMAIN_JUL: |
| 1105 | case LTTNG_DOMAIN_LOG4J: |
| 1106 | case LTTNG_DOMAIN_PYTHON: |
| 1107 | status = LTTNG_EVENT_RULE_STATUS_UNSUPPORTED; |
| 1108 | goto end; |
| 1109 | case LTTNG_DOMAIN_UST: |
| 1110 | /* Exclusions supported. */ |
| 1111 | break; |
| 1112 | default: |
| 1113 | abort(); |
| 1114 | } |
| 1115 | |
| 1116 | if (strlen(exclusion) >= LTTNG_SYMBOL_NAME_LEN) { |
| 1117 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
| 1118 | goto end; |
| 1119 | } |
| 1120 | |
| 1121 | exclusion_copy = strdup(exclusion); |
| 1122 | if (!exclusion_copy) { |
| 1123 | status = LTTNG_EVENT_RULE_STATUS_ERROR; |
| 1124 | goto end; |
| 1125 | } |
| 1126 | |
| 1127 | ret = lttng_dynamic_pointer_array_add_pointer(&tracepoint->exclusions, |
| 1128 | exclusion_copy); |
| 1129 | if (ret < 0) { |
| 1130 | status = LTTNG_EVENT_RULE_STATUS_ERROR; |
| 1131 | goto end; |
| 1132 | } |
| 1133 | |
| 1134 | exclusion_copy = NULL; |
| 1135 | end: |
| 1136 | free(exclusion_copy); |
| 1137 | return status; |
| 1138 | } |
| 1139 | |
| 1140 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_exclusions_count( |
| 1141 | const struct lttng_event_rule *rule, unsigned int *count) |
| 1142 | { |
| 1143 | struct lttng_event_rule_tracepoint *tracepoint; |
| 1144 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; |
| 1145 | |
| 1146 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !count) { |
| 1147 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
| 1148 | goto end; |
| 1149 | } |
| 1150 | |
| 1151 | tracepoint = container_of( |
| 1152 | rule, struct lttng_event_rule_tracepoint, parent); |
| 1153 | *count = lttng_dynamic_pointer_array_get_count(&tracepoint->exclusions); |
| 1154 | end: |
| 1155 | return status; |
| 1156 | } |
| 1157 | |
| 1158 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_exclusion_at_index( |
| 1159 | const struct lttng_event_rule *rule, |
| 1160 | unsigned int index, |
| 1161 | const char **exclusion) |
| 1162 | { |
| 1163 | unsigned int count; |
| 1164 | struct lttng_event_rule_tracepoint *tracepoint; |
| 1165 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; |
| 1166 | |
| 1167 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !exclusion) { |
| 1168 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
| 1169 | goto end; |
| 1170 | } |
| 1171 | |
| 1172 | tracepoint = container_of( |
| 1173 | rule, struct lttng_event_rule_tracepoint, parent); |
| 1174 | if (lttng_event_rule_tracepoint_get_exclusions_count(rule, &count) != |
| 1175 | LTTNG_EVENT_RULE_STATUS_OK) { |
| 1176 | goto end; |
| 1177 | } |
| 1178 | |
| 1179 | if (index >= count) { |
| 1180 | goto end; |
| 1181 | } |
| 1182 | |
| 1183 | *exclusion = lttng_dynamic_pointer_array_get_pointer( |
| 1184 | &tracepoint->exclusions, index); |
| 1185 | end: |
| 1186 | return status; |
| 1187 | } |