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