| 1 | /* |
| 2 | * Copyright (C) 2020 Francis Deslauriers <francis.deslauriers@efficios.com> |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0-only |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #include <fcntl.h> |
| 9 | #include <sys/mman.h> |
| 10 | #include <sys/stat.h> |
| 11 | #include <unistd.h> |
| 12 | #include <urcu/compiler.h> |
| 13 | #include <pthread.h> |
| 14 | |
| 15 | #include <common/error.h> |
| 16 | #include <common/hashtable/hashtable.h> |
| 17 | #include <common/index-allocator.h> |
| 18 | #include <common/kernel-ctl/kernel-ctl.h> |
| 19 | #include <common/shm.h> |
| 20 | #include <lttng/trigger/trigger-internal.h> |
| 21 | |
| 22 | #include "event-notifier-error-accounting.h" |
| 23 | #include "lttng-ust-error.h" |
| 24 | #include "ust-app.h" |
| 25 | |
| 26 | #define ERROR_COUNTER_INDEX_HT_INITIAL_SIZE 16 |
| 27 | |
| 28 | struct index_ht_entry { |
| 29 | struct lttng_ht_node_u64 node; |
| 30 | uint64_t error_counter_index; |
| 31 | struct rcu_head rcu_head; |
| 32 | }; |
| 33 | |
| 34 | struct error_account_entry { |
| 35 | struct lttng_ht_node_u64 node; |
| 36 | struct rcu_head rcu_head; |
| 37 | struct ustctl_daemon_counter *daemon_counter; |
| 38 | /* |
| 39 | * Those `lttng_ust_abi_object_data` are anonymous handles to the counters |
| 40 | * objects. |
| 41 | * They are only used to be duplicated for each new applications of the |
| 42 | * user. To destroy them, call with the `sock` parameter set to -1. |
| 43 | * e.g. `ustctl_release_object(-1, data)`; |
| 44 | */ |
| 45 | struct lttng_ust_abi_object_data *counter; |
| 46 | struct lttng_ust_abi_object_data **cpu_counters; |
| 47 | int nr_counter_cpu_fds; |
| 48 | }; |
| 49 | |
| 50 | struct kernel_error_account_entry { |
| 51 | int kernel_event_notifier_error_counter_fd; |
| 52 | }; |
| 53 | |
| 54 | static struct kernel_error_account_entry kernel_error_accountant; |
| 55 | |
| 56 | /* Hashtable mapping event notifier token to index_ht_entry. */ |
| 57 | static struct lttng_ht *error_counter_indexes_ht; |
| 58 | |
| 59 | /* Hashtable mapping uid to error_account_entry. */ |
| 60 | static struct lttng_ht *error_counter_uid_ht; |
| 61 | |
| 62 | static uint64_t error_counter_size; |
| 63 | static struct lttng_index_allocator *index_allocator; |
| 64 | |
| 65 | static inline void get_trigger_info_for_log(const struct lttng_trigger *trigger, |
| 66 | const char **trigger_name, |
| 67 | uid_t *trigger_owner_uid) |
| 68 | { |
| 69 | enum lttng_trigger_status trigger_status; |
| 70 | |
| 71 | trigger_status = lttng_trigger_get_name(trigger, trigger_name); |
| 72 | switch (trigger_status) { |
| 73 | case LTTNG_TRIGGER_STATUS_OK: |
| 74 | break; |
| 75 | case LTTNG_TRIGGER_STATUS_UNSET: |
| 76 | *trigger_name = "(unset)"; |
| 77 | break; |
| 78 | default: |
| 79 | abort(); |
| 80 | } |
| 81 | |
| 82 | trigger_status = lttng_trigger_get_owner_uid(trigger, |
| 83 | trigger_owner_uid); |
| 84 | assert(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
| 85 | } |
| 86 | |
| 87 | static inline |
| 88 | const char *error_accounting_status_str( |
| 89 | enum event_notifier_error_accounting_status status) |
| 90 | { |
| 91 | switch (status) { |
| 92 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK: |
| 93 | return "OK"; |
| 94 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR: |
| 95 | return "ERROR"; |
| 96 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOT_FOUND: |
| 97 | return "NOT_FOUND"; |
| 98 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM: |
| 99 | return "NOMEM"; |
| 100 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NO_INDEX_AVAILABLE: |
| 101 | return "NO_INDEX_AVAILABLE"; |
| 102 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD: |
| 103 | return "APP_DEAD"; |
| 104 | default: |
| 105 | abort(); |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | enum event_notifier_error_accounting_status |
| 110 | event_notifier_error_accounting_init(uint64_t nb_bucket) |
| 111 | { |
| 112 | enum event_notifier_error_accounting_status status; |
| 113 | |
| 114 | index_allocator = lttng_index_allocator_create(nb_bucket); |
| 115 | if (!index_allocator) { |
| 116 | ERR("Failed to allocate event notifier error counter index"); |
| 117 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; |
| 118 | goto error_index_allocator; |
| 119 | } |
| 120 | |
| 121 | error_counter_indexes_ht = lttng_ht_new( |
| 122 | ERROR_COUNTER_INDEX_HT_INITIAL_SIZE, LTTNG_HT_TYPE_U64); |
| 123 | if (!error_counter_indexes_ht) { |
| 124 | ERR("Failed to allocate error counter indices hash table"); |
| 125 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; |
| 126 | goto error_index_allocator; |
| 127 | } |
| 128 | |
| 129 | error_counter_uid_ht = lttng_ht_new( |
| 130 | ERROR_COUNTER_INDEX_HT_INITIAL_SIZE, LTTNG_HT_TYPE_U64); |
| 131 | if (!error_counter_uid_ht) { |
| 132 | ERR("Failed to allocate UID to error counter accountant hash table"); |
| 133 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; |
| 134 | goto error_index_allocator; |
| 135 | } |
| 136 | |
| 137 | error_counter_size = nb_bucket; |
| 138 | |
| 139 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
| 140 | |
| 141 | error_index_allocator: |
| 142 | return status; |
| 143 | } |
| 144 | |
| 145 | static |
| 146 | enum event_notifier_error_accounting_status get_error_counter_index_for_token( |
| 147 | uint64_t tracer_token, uint64_t *error_counter_index) |
| 148 | { |
| 149 | struct lttng_ht_node_u64 *node; |
| 150 | struct lttng_ht_iter iter; |
| 151 | const struct index_ht_entry *index_entry; |
| 152 | enum event_notifier_error_accounting_status status; |
| 153 | |
| 154 | rcu_read_lock(); |
| 155 | lttng_ht_lookup(error_counter_indexes_ht, &tracer_token, &iter); |
| 156 | node = lttng_ht_iter_get_node_u64(&iter); |
| 157 | if (node) { |
| 158 | index_entry = caa_container_of( |
| 159 | node, const struct index_ht_entry, node); |
| 160 | *error_counter_index = index_entry->error_counter_index; |
| 161 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
| 162 | } else { |
| 163 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOT_FOUND; |
| 164 | } |
| 165 | |
| 166 | rcu_read_unlock(); |
| 167 | return status; |
| 168 | } |
| 169 | |
| 170 | #ifdef HAVE_LIBLTTNG_UST_CTL |
| 171 | static |
| 172 | struct error_account_entry *get_uid_accounting_entry(const struct ust_app *app) |
| 173 | { |
| 174 | struct error_account_entry *entry; |
| 175 | struct lttng_ht_node_u64 *node; |
| 176 | struct lttng_ht_iter iter; |
| 177 | uint64_t key = app->uid; |
| 178 | |
| 179 | lttng_ht_lookup(error_counter_uid_ht, &key, &iter); |
| 180 | node = lttng_ht_iter_get_node_u64(&iter); |
| 181 | if(node == NULL) { |
| 182 | entry = NULL; |
| 183 | } else { |
| 184 | entry = caa_container_of(node, struct error_account_entry, node); |
| 185 | } |
| 186 | |
| 187 | return entry; |
| 188 | } |
| 189 | |
| 190 | static |
| 191 | struct error_account_entry *create_uid_accounting_entry( |
| 192 | const struct ust_app *app) |
| 193 | { |
| 194 | int i, ret; |
| 195 | struct ustctl_daemon_counter *daemon_counter; |
| 196 | struct lttng_ust_abi_object_data *counter, **cpu_counters; |
| 197 | int *cpu_counter_fds = NULL; |
| 198 | struct error_account_entry *entry = NULL; |
| 199 | const struct ustctl_counter_dimension dimension = { |
| 200 | .size = error_counter_size, |
| 201 | .has_underflow = false, |
| 202 | .has_overflow = false, |
| 203 | }; |
| 204 | |
| 205 | entry = zmalloc(sizeof(struct error_account_entry)); |
| 206 | if (!entry) { |
| 207 | PERROR("Failed to allocate event notifier error acounting entry") |
| 208 | goto error; |
| 209 | } |
| 210 | |
| 211 | entry->nr_counter_cpu_fds = ustctl_get_nr_cpu_per_counter(); |
| 212 | cpu_counter_fds = zmalloc(entry->nr_counter_cpu_fds * sizeof(*cpu_counter_fds)); |
| 213 | if (!cpu_counter_fds) { |
| 214 | PERROR("Failed to allocate event notifier error counter file descriptors array: application uid = %d, application name = '%s', pid = %d, allocation size = %zu", |
| 215 | (int) app->uid, app->name, (int) app->pid, |
| 216 | entry->nr_counter_cpu_fds * sizeof(*cpu_counter_fds)); |
| 217 | ret = -1; |
| 218 | goto error_counter_cpu_fds_alloc; |
| 219 | } |
| 220 | |
| 221 | /* Initialize to an invalid fd value to closes fds in case of error. */ |
| 222 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { |
| 223 | cpu_counter_fds[i] = -1; |
| 224 | } |
| 225 | |
| 226 | cpu_counters = zmalloc(entry->nr_counter_cpu_fds * sizeof(**cpu_counters)); |
| 227 | if (!cpu_counters) { |
| 228 | PERROR("Failed to allocate event notifier error counter lttng_ust_abi_object_data array: application uid = %d, application name = '%s', pid = %d, allocation size = %zu", |
| 229 | (int) app->uid, app->name, (int) app->pid, |
| 230 | entry->nr_counter_cpu_fds * sizeof(**cpu_counters)); |
| 231 | ret = -1; |
| 232 | goto error_counter_cpus_alloc; |
| 233 | } |
| 234 | |
| 235 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { |
| 236 | cpu_counter_fds[i] = shm_create_anonymous("event-notifier-error-accounting"); |
| 237 | if (cpu_counter_fds[i] == -1) { |
| 238 | ERR("Failed to create event notifier error accounting shared memory for application user: application uid = %d, pid = %d, application name = '%s'", |
| 239 | (int) app->uid, (int) app->pid, app->name); |
| 240 | goto error_shm_alloc; |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | /* |
| 245 | * Ownership of the file descriptors transferred to the ustctl object. |
| 246 | */ |
| 247 | daemon_counter = ustctl_create_counter(1, &dimension, 0, -1, |
| 248 | entry->nr_counter_cpu_fds, cpu_counter_fds, |
| 249 | USTCTL_COUNTER_BITNESS_32, |
| 250 | USTCTL_COUNTER_ARITHMETIC_MODULAR, |
| 251 | USTCTL_COUNTER_ALLOC_PER_CPU, |
| 252 | false); |
| 253 | if (!daemon_counter) { |
| 254 | goto error_create_daemon_counter; |
| 255 | } |
| 256 | |
| 257 | ret = ustctl_create_counter_data(daemon_counter, &counter); |
| 258 | if (ret) { |
| 259 | ERR("Failed to create userspace tracer counter data for application user: uid = %d, pid = %d, application name = '%s'", |
| 260 | (int) app->uid, (int) app->pid, app->name); |
| 261 | goto error_create_counter_data; |
| 262 | } |
| 263 | |
| 264 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { |
| 265 | ret = ustctl_create_counter_cpu_data(daemon_counter, i, |
| 266 | &cpu_counters[i]); |
| 267 | if (ret) { |
| 268 | ERR("Failed to create userspace tracer counter cpu data for application user: uid = %d, pid = %d, application name = '%s'", |
| 269 | (int) app->uid, (int) app->pid, |
| 270 | app->name); |
| 271 | goto error_create_counter_cpu_data; |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | entry->daemon_counter = daemon_counter; |
| 276 | entry->counter = counter; |
| 277 | entry->cpu_counters = cpu_counters; |
| 278 | |
| 279 | lttng_ht_node_init_u64(&entry->node, app->uid); |
| 280 | lttng_ht_add_unique_u64(error_counter_uid_ht, &entry->node); |
| 281 | |
| 282 | goto end; |
| 283 | |
| 284 | error_create_counter_cpu_data: |
| 285 | /* Teardown any allocated cpu counters. */ |
| 286 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { |
| 287 | if (!cpu_counters[i]) { |
| 288 | /* |
| 289 | * Early-exit when error occurred before all cpu |
| 290 | * counters could be initialized. |
| 291 | */ |
| 292 | break; |
| 293 | } |
| 294 | |
| 295 | ustctl_release_object(-1, cpu_counters[i]); |
| 296 | free(cpu_counters[i]); |
| 297 | } |
| 298 | |
| 299 | ustctl_release_object(-1, entry->counter); |
| 300 | free(entry->counter); |
| 301 | error_create_counter_data: |
| 302 | ustctl_destroy_counter(daemon_counter); |
| 303 | error_create_daemon_counter: |
| 304 | error_shm_alloc: |
| 305 | /* Error occured before per-cpu SHMs were handed-off to ustctl. */ |
| 306 | if (cpu_counter_fds) { |
| 307 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { |
| 308 | if (cpu_counter_fds[i] < 0) { |
| 309 | /* |
| 310 | * Early-exit when error occurred before all cpu |
| 311 | * counter shm fds could be initialized. |
| 312 | */ |
| 313 | break; |
| 314 | } |
| 315 | |
| 316 | ret = close(cpu_counter_fds[i]); |
| 317 | if (ret) { |
| 318 | PERROR("Failed to close error counter per-CPU shm file descriptor: fd = %d", cpu_counter_fds[i]); |
| 319 | } |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | free(cpu_counters); |
| 324 | error_counter_cpus_alloc: |
| 325 | error_counter_cpu_fds_alloc: |
| 326 | free(entry); |
| 327 | error: |
| 328 | entry = NULL; |
| 329 | end: |
| 330 | free(cpu_counter_fds); |
| 331 | return entry; |
| 332 | } |
| 333 | |
| 334 | static |
| 335 | enum event_notifier_error_accounting_status send_counter_data_to_ust( |
| 336 | struct ust_app *app, |
| 337 | struct lttng_ust_abi_object_data *new_counter) |
| 338 | { |
| 339 | int ret; |
| 340 | enum event_notifier_error_accounting_status status; |
| 341 | |
| 342 | /* Attach counter to trigger group. */ |
| 343 | pthread_mutex_lock(&app->sock_lock); |
| 344 | ret = ustctl_send_counter_data_to_ust(app->sock, |
| 345 | app->event_notifier_group.object->handle, new_counter); |
| 346 | pthread_mutex_unlock(&app->sock_lock); |
| 347 | if (ret < 0) { |
| 348 | if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { |
| 349 | ERR("Failed to send counter data to application: application name = '%s', pid = %d, ret = %d", |
| 350 | app->name, app->pid, ret); |
| 351 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
| 352 | } else { |
| 353 | DBG3("Failed to send counter data to application (application is dead): application name = '%s', pid = %d, ret = %d", |
| 354 | app->name, app->pid, ret); |
| 355 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD; |
| 356 | } |
| 357 | |
| 358 | goto end; |
| 359 | } |
| 360 | |
| 361 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
| 362 | end: |
| 363 | return status; |
| 364 | } |
| 365 | |
| 366 | static |
| 367 | enum event_notifier_error_accounting_status send_counter_cpu_data_to_ust( |
| 368 | struct ust_app *app, |
| 369 | struct lttng_ust_abi_object_data *counter, |
| 370 | struct lttng_ust_abi_object_data *counter_cpu) |
| 371 | { |
| 372 | int ret; |
| 373 | enum event_notifier_error_accounting_status status; |
| 374 | |
| 375 | pthread_mutex_lock(&app->sock_lock); |
| 376 | ret = ustctl_send_counter_cpu_data_to_ust(app->sock, |
| 377 | counter, counter_cpu); |
| 378 | pthread_mutex_unlock(&app->sock_lock); |
| 379 | if (ret < 0) { |
| 380 | if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) { |
| 381 | ERR("Failed to send counter CPU data to application: application name = '%s', pid = %d, ret = %d", |
| 382 | app->name, app->pid, ret); |
| 383 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
| 384 | } else { |
| 385 | DBG3("Failed to send counter CPU data to application: application name = '%s', pid = %d, ret = %d", |
| 386 | app->name, app->pid, ret); |
| 387 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD; |
| 388 | } |
| 389 | |
| 390 | goto end; |
| 391 | } |
| 392 | |
| 393 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
| 394 | end: |
| 395 | return status; |
| 396 | } |
| 397 | |
| 398 | enum event_notifier_error_accounting_status |
| 399 | event_notifier_error_accounting_register_app(struct ust_app *app) |
| 400 | { |
| 401 | int ret; |
| 402 | uint64_t i; |
| 403 | struct lttng_ust_abi_object_data *new_counter; |
| 404 | struct error_account_entry *entry; |
| 405 | enum event_notifier_error_accounting_status status; |
| 406 | struct lttng_ust_abi_object_data **cpu_counters; |
| 407 | |
| 408 | /* |
| 409 | * Check if we already have a error counter for the user id of this |
| 410 | * app. If not, create one. |
| 411 | */ |
| 412 | rcu_read_lock(); |
| 413 | entry = get_uid_accounting_entry(app); |
| 414 | if (entry == NULL) { |
| 415 | entry = create_uid_accounting_entry(app); |
| 416 | if (!entry) { |
| 417 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
| 418 | goto end; |
| 419 | } |
| 420 | } |
| 421 | |
| 422 | /* Duplicate counter object data. */ |
| 423 | ret = ustctl_duplicate_ust_object_data(&new_counter, |
| 424 | entry->counter); |
| 425 | if (ret) { |
| 426 | ERR("Failed to duplicate event notifier error accounting counter for application user: application uid = %d, pid = %d, application name = '%s'", |
| 427 | (int) app->uid, (int) app->pid, app->name); |
| 428 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
| 429 | goto end; |
| 430 | } |
| 431 | |
| 432 | status = send_counter_data_to_ust(app, new_counter); |
| 433 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
| 434 | ERR("Failed to send counter data to application tracer: status = %s, application uid = %d, pid = %d, application name = '%s'", |
| 435 | error_accounting_status_str(status), |
| 436 | (int) app->uid, (int) app->pid, app->name); |
| 437 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
| 438 | goto error_send_counter_data; |
| 439 | } |
| 440 | |
| 441 | cpu_counters = zmalloc(entry->nr_counter_cpu_fds * sizeof(struct lttng_ust_abi_object_data)); |
| 442 | if (!cpu_counters) { |
| 443 | PERROR("Failed to allocate event notifier error counter lttng_ust_abi_object_data array: application uid = %d, application name = '%s', pid = %d, allocation size = %zu", |
| 444 | (int) app->uid, app->name, (int) app->pid, |
| 445 | entry->nr_counter_cpu_fds * sizeof(**cpu_counters)); |
| 446 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; |
| 447 | goto error_allocate_cpu_counters; |
| 448 | } |
| 449 | |
| 450 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { |
| 451 | struct lttng_ust_abi_object_data *new_counter_cpu = NULL; |
| 452 | |
| 453 | ret = ustctl_duplicate_ust_object_data(&new_counter_cpu, |
| 454 | entry->cpu_counters[i]); |
| 455 | if (ret) { |
| 456 | ERR("Failed to duplicate userspace tracer counter cpu data for application user: uid = %d, pid = %d, application name = '%s'", |
| 457 | (int) app->uid, (int) app->pid, |
| 458 | app->name); |
| 459 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; |
| 460 | goto error_duplicate_cpu_counter; |
| 461 | } |
| 462 | |
| 463 | cpu_counters[i] = new_counter_cpu; |
| 464 | |
| 465 | status = send_counter_cpu_data_to_ust(app, new_counter, |
| 466 | new_counter_cpu); |
| 467 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
| 468 | ERR("Failed to send counter cpu data to application tracer: status = %s, application uid = %d, pid = %d, application name = '%s'", |
| 469 | error_accounting_status_str(status), |
| 470 | (int) app->uid, (int) app->pid, |
| 471 | app->name); |
| 472 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
| 473 | goto error_send_cpu_counter_data; |
| 474 | } |
| 475 | } |
| 476 | |
| 477 | app->event_notifier_group.counter = new_counter; |
| 478 | new_counter = NULL; |
| 479 | app->event_notifier_group.nr_counter_cpu = entry->nr_counter_cpu_fds; |
| 480 | app->event_notifier_group.counter_cpu = cpu_counters; |
| 481 | cpu_counters = NULL; |
| 482 | goto end; |
| 483 | |
| 484 | error_allocate_cpu_counters: |
| 485 | error_send_cpu_counter_data: |
| 486 | error_duplicate_cpu_counter: |
| 487 | /* Teardown any duplicated cpu counters. */ |
| 488 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { |
| 489 | if (!cpu_counters[i]) { |
| 490 | /* |
| 491 | * Early-exit when error occurred before all cpu |
| 492 | * counters could be initialized. |
| 493 | */ |
| 494 | break; |
| 495 | } |
| 496 | |
| 497 | ustctl_release_object(-1, cpu_counters[i]); |
| 498 | free(cpu_counters[i]); |
| 499 | } |
| 500 | |
| 501 | error_send_counter_data: |
| 502 | ustctl_release_object(-1, new_counter); |
| 503 | free(new_counter); |
| 504 | end: |
| 505 | rcu_read_unlock(); |
| 506 | return status; |
| 507 | } |
| 508 | |
| 509 | enum event_notifier_error_accounting_status |
| 510 | event_notifier_error_accounting_unregister_app(struct ust_app *app) |
| 511 | { |
| 512 | enum event_notifier_error_accounting_status status; |
| 513 | struct error_account_entry *entry; |
| 514 | int i; |
| 515 | |
| 516 | rcu_read_lock(); |
| 517 | entry = get_uid_accounting_entry(app); |
| 518 | if (entry == NULL) { |
| 519 | ERR("Failed to find event notitifier error accounting entry on application teardown: pid = %d, application name = '%s'", |
| 520 | app->pid, app->name); |
| 521 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
| 522 | goto end; |
| 523 | } |
| 524 | |
| 525 | for (i = 0; i < app->event_notifier_group.nr_counter_cpu; i++) { |
| 526 | ustctl_release_object(app->sock, |
| 527 | app->event_notifier_group.counter_cpu[i]); |
| 528 | free(app->event_notifier_group.counter_cpu[i]); |
| 529 | } |
| 530 | |
| 531 | free(app->event_notifier_group.counter_cpu); |
| 532 | |
| 533 | ustctl_release_object(app->sock, app->event_notifier_group.counter); |
| 534 | free(app->event_notifier_group.counter); |
| 535 | |
| 536 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
| 537 | end: |
| 538 | rcu_read_unlock(); |
| 539 | return status; |
| 540 | } |
| 541 | |
| 542 | static |
| 543 | enum event_notifier_error_accounting_status |
| 544 | event_notifier_error_accounting_ust_get_count( |
| 545 | const struct lttng_trigger *trigger, uint64_t *count) |
| 546 | { |
| 547 | struct lttng_ht_iter iter; |
| 548 | struct error_account_entry *uid_entry; |
| 549 | uint64_t error_counter_index, global_sum = 0; |
| 550 | enum event_notifier_error_accounting_status status; |
| 551 | size_t dimension_indexes[1]; |
| 552 | const uint64_t tracer_token = lttng_trigger_get_tracer_token(trigger); |
| 553 | |
| 554 | /* |
| 555 | * Go over all error counters (ignoring uid) as a trigger (and trigger |
| 556 | * errors) can be generated from any applications that this session |
| 557 | * daemon is managing. |
| 558 | */ |
| 559 | |
| 560 | rcu_read_lock(); |
| 561 | |
| 562 | status = get_error_counter_index_for_token( |
| 563 | tracer_token, |
| 564 | &error_counter_index); |
| 565 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
| 566 | uid_t trigger_owner_uid; |
| 567 | const char *trigger_name; |
| 568 | |
| 569 | get_trigger_info_for_log(trigger, &trigger_name, |
| 570 | &trigger_owner_uid); |
| 571 | |
| 572 | ERR("Failed to retrieve index for tracer token: token = %" PRIu64 ", trigger name = '%s', trigger owner uid = %d, status = %s", |
| 573 | tracer_token, trigger_name, |
| 574 | (int) trigger_owner_uid, |
| 575 | error_accounting_status_str(status)); |
| 576 | goto end; |
| 577 | } |
| 578 | |
| 579 | dimension_indexes[0] = error_counter_index; |
| 580 | |
| 581 | cds_lfht_for_each_entry(error_counter_uid_ht->ht, &iter.iter, |
| 582 | uid_entry, node.node) { |
| 583 | int ret; |
| 584 | int64_t local_value = 0; |
| 585 | bool overflow = false, underflow = false; |
| 586 | |
| 587 | ret = ustctl_counter_aggregate(uid_entry->daemon_counter, |
| 588 | dimension_indexes, &local_value, &overflow, |
| 589 | &underflow); |
| 590 | if (ret || local_value < 0) { |
| 591 | uid_t trigger_owner_uid; |
| 592 | const char *trigger_name; |
| 593 | |
| 594 | get_trigger_info_for_log(trigger, &trigger_name, |
| 595 | &trigger_owner_uid); |
| 596 | |
| 597 | if (ret) { |
| 598 | ERR("Failed to aggregate event notifier error counter values of trigger: trigger name = '%s', trigger owner uid = %d", |
| 599 | trigger_name, |
| 600 | (int) trigger_owner_uid); |
| 601 | } else if (local_value < 0) { |
| 602 | ERR("Negative event notifier error counter value encountered during aggregation: trigger name = '%s', trigger owner uid = %d, value = %" PRId64, |
| 603 | trigger_name, |
| 604 | (int) trigger_owner_uid, |
| 605 | local_value); |
| 606 | } else { |
| 607 | abort(); |
| 608 | } |
| 609 | |
| 610 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
| 611 | goto end; |
| 612 | } |
| 613 | |
| 614 | /* Cast is safe as negative values are checked-for above. */ |
| 615 | global_sum += (uint64_t) local_value; |
| 616 | |
| 617 | } |
| 618 | |
| 619 | *count = global_sum; |
| 620 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
| 621 | |
| 622 | end: |
| 623 | rcu_read_unlock(); |
| 624 | return status; |
| 625 | } |
| 626 | |
| 627 | static |
| 628 | enum event_notifier_error_accounting_status event_notifier_error_accounting_ust_clear( |
| 629 | const struct lttng_trigger *trigger) |
| 630 | { |
| 631 | struct lttng_ht_iter iter; |
| 632 | struct error_account_entry *uid_entry; |
| 633 | uint64_t error_counter_index; |
| 634 | enum event_notifier_error_accounting_status status; |
| 635 | size_t dimension_index; |
| 636 | const uint64_t tracer_token = lttng_trigger_get_tracer_token(trigger); |
| 637 | |
| 638 | /* |
| 639 | * Go over all error counters (ignoring uid) as a trigger (and trigger |
| 640 | * errors) can be generated from any applications that this session |
| 641 | * daemon is managing. |
| 642 | */ |
| 643 | |
| 644 | rcu_read_lock(); |
| 645 | status = get_error_counter_index_for_token( |
| 646 | tracer_token, |
| 647 | &error_counter_index); |
| 648 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
| 649 | uid_t trigger_owner_uid; |
| 650 | const char *trigger_name; |
| 651 | |
| 652 | get_trigger_info_for_log(trigger, &trigger_name, |
| 653 | &trigger_owner_uid); |
| 654 | |
| 655 | ERR("Failed to retrieve index for tracer token: token = %" PRIu64 ", trigger name = '%s', trigger owner uid = %d, status = %s", |
| 656 | tracer_token, trigger_name, |
| 657 | (int) trigger_owner_uid, |
| 658 | error_accounting_status_str(status)); |
| 659 | goto end; |
| 660 | } |
| 661 | |
| 662 | dimension_index = error_counter_index; |
| 663 | |
| 664 | cds_lfht_for_each_entry(error_counter_uid_ht->ht, &iter.iter, |
| 665 | uid_entry, node.node) { |
| 666 | const int ret = ustctl_counter_clear(uid_entry->daemon_counter, |
| 667 | &dimension_index); |
| 668 | |
| 669 | if (ret) { |
| 670 | uid_t trigger_owner_uid; |
| 671 | const char *trigger_name; |
| 672 | |
| 673 | get_trigger_info_for_log(trigger, &trigger_name, |
| 674 | &trigger_owner_uid); |
| 675 | ERR("Failed to clear event notifier counter value for trigger: counter uid = %d, trigger name = '%s', trigger owner uid = %d", |
| 676 | (int) uid_entry->node.key, trigger_name, |
| 677 | (int) trigger_owner_uid); |
| 678 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
| 679 | goto end; |
| 680 | } |
| 681 | } |
| 682 | |
| 683 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
| 684 | end: |
| 685 | rcu_read_unlock(); |
| 686 | return status; |
| 687 | } |
| 688 | #endif /* HAVE_LIBLTTNG_UST_CTL */ |
| 689 | |
| 690 | static |
| 691 | enum event_notifier_error_accounting_status |
| 692 | event_notifier_error_accounting_kernel_clear( |
| 693 | const struct lttng_trigger *trigger) |
| 694 | { |
| 695 | int ret; |
| 696 | uint64_t error_counter_index; |
| 697 | enum event_notifier_error_accounting_status status; |
| 698 | struct lttng_kernel_counter_clear counter_clear = {}; |
| 699 | |
| 700 | status = get_error_counter_index_for_token( |
| 701 | lttng_trigger_get_tracer_token(trigger), |
| 702 | &error_counter_index); |
| 703 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
| 704 | uid_t trigger_owner_uid; |
| 705 | const char *trigger_name; |
| 706 | |
| 707 | get_trigger_info_for_log( |
| 708 | trigger, &trigger_name, &trigger_owner_uid); |
| 709 | |
| 710 | ERR("Failed to get event notifier error counter index: trigger owner uid = %d, trigger name = '%s', status = '%s'", |
| 711 | trigger_owner_uid, trigger_name, |
| 712 | error_accounting_status_str(status)); |
| 713 | goto end; |
| 714 | } |
| 715 | |
| 716 | counter_clear.index.number_dimensions = 1; |
| 717 | counter_clear.index.dimension_indexes[0] = error_counter_index; |
| 718 | |
| 719 | ret = kernctl_counter_clear( |
| 720 | kernel_error_accountant.kernel_event_notifier_error_counter_fd, |
| 721 | &counter_clear); |
| 722 | if (ret) { |
| 723 | uid_t trigger_owner_uid; |
| 724 | const char *trigger_name; |
| 725 | |
| 726 | get_trigger_info_for_log( |
| 727 | trigger, &trigger_name, &trigger_owner_uid); |
| 728 | |
| 729 | ERR("Failed to clear kernel event notifier error counter: trigger owner uid = %d, trigger name = '%s'", |
| 730 | trigger_owner_uid, trigger_name); |
| 731 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
| 732 | goto end; |
| 733 | } |
| 734 | |
| 735 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
| 736 | end: |
| 737 | return status; |
| 738 | } |
| 739 | |
| 740 | enum event_notifier_error_accounting_status |
| 741 | event_notifier_error_accounting_register_kernel( |
| 742 | int kernel_event_notifier_group_fd) |
| 743 | { |
| 744 | int error_counter_fd = -1, ret; |
| 745 | enum event_notifier_error_accounting_status status; |
| 746 | const struct lttng_kernel_counter_conf error_counter_conf = { |
| 747 | .arithmetic = LTTNG_KERNEL_COUNTER_ARITHMETIC_MODULAR, |
| 748 | .bitness = sizeof(void *) == sizeof(uint32_t) ? |
| 749 | LTTNG_KERNEL_COUNTER_BITNESS_32 : |
| 750 | LTTNG_KERNEL_COUNTER_BITNESS_64, |
| 751 | .global_sum_step = 0, |
| 752 | .number_dimensions = 1, |
| 753 | .dimensions[0].size = error_counter_size, |
| 754 | .dimensions[0].has_underflow = false, |
| 755 | .dimensions[0].has_overflow = false, |
| 756 | }; |
| 757 | |
| 758 | ret = kernctl_create_event_notifier_group_error_counter( |
| 759 | kernel_event_notifier_group_fd, &error_counter_conf); |
| 760 | if (ret < 0) { |
| 761 | PERROR("Failed to create event notifier group error counter through kernel ioctl: kernel_event_notifier_group_fd = %d", |
| 762 | kernel_event_notifier_group_fd); |
| 763 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
| 764 | goto error; |
| 765 | } |
| 766 | |
| 767 | error_counter_fd = ret; |
| 768 | |
| 769 | /* Prevent fd duplication after execlp(). */ |
| 770 | ret = fcntl(error_counter_fd, F_SETFD, FD_CLOEXEC); |
| 771 | if (ret < 0) { |
| 772 | PERROR("Failed to set FD_CLOEXEC flag on event notifier error counter file descriptor: error_counter_fd = %d", |
| 773 | error_counter_fd); |
| 774 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
| 775 | goto error; |
| 776 | } |
| 777 | |
| 778 | DBG("Created kernel event notifier group error counter: fd = %d", |
| 779 | error_counter_fd); |
| 780 | |
| 781 | kernel_error_accountant.kernel_event_notifier_error_counter_fd = |
| 782 | error_counter_fd; |
| 783 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
| 784 | |
| 785 | error: |
| 786 | return status; |
| 787 | } |
| 788 | |
| 789 | static |
| 790 | enum event_notifier_error_accounting_status create_error_counter_index_for_token( |
| 791 | uint64_t tracer_token, uint64_t *error_counter_index) |
| 792 | { |
| 793 | struct index_ht_entry *index_entry; |
| 794 | enum lttng_index_allocator_status index_alloc_status; |
| 795 | uint64_t local_error_counter_index; |
| 796 | enum event_notifier_error_accounting_status status; |
| 797 | |
| 798 | /* Allocate a new index for that counter. */ |
| 799 | index_alloc_status = lttng_index_allocator_alloc(index_allocator, |
| 800 | &local_error_counter_index); |
| 801 | switch (index_alloc_status) { |
| 802 | case LTTNG_INDEX_ALLOCATOR_STATUS_EMPTY: |
| 803 | DBG("No indices left in the configured event notifier error counter: " |
| 804 | "number-of-indices = %"PRIu64, |
| 805 | lttng_index_allocator_get_index_count( |
| 806 | index_allocator)); |
| 807 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NO_INDEX_AVAILABLE; |
| 808 | goto end; |
| 809 | case LTTNG_INDEX_ALLOCATOR_STATUS_OK: |
| 810 | break; |
| 811 | default: |
| 812 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
| 813 | goto end; |
| 814 | } |
| 815 | |
| 816 | index_entry = zmalloc(sizeof(*index_entry)); |
| 817 | if (index_entry == NULL) { |
| 818 | PERROR("Failed to allocate event notifier error counter hash table entry"); |
| 819 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; |
| 820 | goto end; |
| 821 | } |
| 822 | |
| 823 | index_entry->error_counter_index = local_error_counter_index; |
| 824 | lttng_ht_node_init_u64(&index_entry->node, tracer_token); |
| 825 | lttng_ht_add_unique_u64(error_counter_indexes_ht, &index_entry->node); |
| 826 | |
| 827 | DBG("Allocated error counter index for tracer token: tracer token = %" PRIu64 ", index = %" PRIu64, |
| 828 | tracer_token, local_error_counter_index); |
| 829 | *error_counter_index = local_error_counter_index; |
| 830 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
| 831 | end: |
| 832 | return status; |
| 833 | } |
| 834 | |
| 835 | enum event_notifier_error_accounting_status |
| 836 | event_notifier_error_accounting_register_event_notifier( |
| 837 | const struct lttng_trigger *trigger, |
| 838 | uint64_t *error_counter_index) |
| 839 | { |
| 840 | enum event_notifier_error_accounting_status status; |
| 841 | uint64_t local_error_counter_index; |
| 842 | |
| 843 | /* |
| 844 | * Check if this event notifier already has a error counter index |
| 845 | * assigned. |
| 846 | */ |
| 847 | status = get_error_counter_index_for_token( |
| 848 | lttng_trigger_get_tracer_token(trigger), |
| 849 | &local_error_counter_index); |
| 850 | switch (status) { |
| 851 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOT_FOUND: |
| 852 | { |
| 853 | uid_t trigger_owner_uid; |
| 854 | const char *trigger_name; |
| 855 | |
| 856 | get_trigger_info_for_log( |
| 857 | trigger, &trigger_name, &trigger_owner_uid); |
| 858 | |
| 859 | DBG("Event notifier error counter index not found for tracer token (allocating a new one): trigger name = '%s', trigger owner uid = %d, tracer token = %" PRIu64, |
| 860 | trigger_name, trigger_owner_uid, |
| 861 | lttng_trigger_get_tracer_token(trigger)); |
| 862 | |
| 863 | status = create_error_counter_index_for_token( |
| 864 | lttng_trigger_get_tracer_token(trigger), |
| 865 | &local_error_counter_index); |
| 866 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
| 867 | ERR("Error creating index for token: status = %s, trigger name = '%s', trigger owner uid = %d", |
| 868 | error_accounting_status_str(status), |
| 869 | trigger_name, trigger_owner_uid); |
| 870 | goto end; |
| 871 | } |
| 872 | /* fall-through. */ |
| 873 | } |
| 874 | case EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK: |
| 875 | *error_counter_index = local_error_counter_index; |
| 876 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
| 877 | break; |
| 878 | default: |
| 879 | break; |
| 880 | } |
| 881 | |
| 882 | end: |
| 883 | return status; |
| 884 | } |
| 885 | |
| 886 | static |
| 887 | enum event_notifier_error_accounting_status |
| 888 | event_notifier_error_accounting_kernel_get_count( |
| 889 | const struct lttng_trigger *trigger, uint64_t *count) |
| 890 | { |
| 891 | struct lttng_kernel_counter_aggregate counter_aggregate = {}; |
| 892 | enum event_notifier_error_accounting_status status; |
| 893 | uint64_t error_counter_index; |
| 894 | int ret; |
| 895 | |
| 896 | status = get_error_counter_index_for_token( |
| 897 | lttng_trigger_get_tracer_token(trigger), &error_counter_index); |
| 898 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
| 899 | ERR("Error getting index for token: status=%s", |
| 900 | error_accounting_status_str(status)); |
| 901 | goto end; |
| 902 | } |
| 903 | |
| 904 | counter_aggregate.index.number_dimensions = 1; |
| 905 | counter_aggregate.index.dimension_indexes[0] = error_counter_index; |
| 906 | |
| 907 | assert(kernel_error_accountant.kernel_event_notifier_error_counter_fd); |
| 908 | |
| 909 | ret = kernctl_counter_get_aggregate_value( |
| 910 | kernel_error_accountant.kernel_event_notifier_error_counter_fd, |
| 911 | &counter_aggregate); |
| 912 | if (ret || counter_aggregate.value.value < 0) { |
| 913 | uid_t trigger_owner_uid; |
| 914 | const char *trigger_name; |
| 915 | |
| 916 | get_trigger_info_for_log(trigger, &trigger_name, |
| 917 | &trigger_owner_uid); |
| 918 | |
| 919 | if (counter_aggregate.value.value < 0) { |
| 920 | ERR("Invalid negative event notifier error counter value: trigger owner = %d, trigger name = '%s', value = %" PRId64, |
| 921 | trigger_owner_uid, trigger_name, |
| 922 | counter_aggregate.value.value); |
| 923 | } else { |
| 924 | ERR("Failed to getting event notifier error count: trigger owner = %d, trigger name = '%s', ret = %d", |
| 925 | trigger_owner_uid, trigger_name, ret); |
| 926 | } |
| 927 | |
| 928 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR; |
| 929 | goto end; |
| 930 | } |
| 931 | |
| 932 | /* Error count can't be negative. */ |
| 933 | assert(counter_aggregate.value.value >= 0); |
| 934 | *count = (uint64_t) counter_aggregate.value.value; |
| 935 | |
| 936 | status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
| 937 | |
| 938 | end: |
| 939 | return status; |
| 940 | } |
| 941 | |
| 942 | enum event_notifier_error_accounting_status |
| 943 | event_notifier_error_accounting_get_count( |
| 944 | const struct lttng_trigger *trigger, uint64_t *count) |
| 945 | { |
| 946 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { |
| 947 | case LTTNG_DOMAIN_KERNEL: |
| 948 | return event_notifier_error_accounting_kernel_get_count( |
| 949 | trigger, count); |
| 950 | case LTTNG_DOMAIN_UST: |
| 951 | #ifdef HAVE_LIBLTTNG_UST_CTL |
| 952 | return event_notifier_error_accounting_ust_get_count(trigger, count); |
| 953 | #else |
| 954 | return EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
| 955 | #endif /* HAVE_LIBLTTNG_UST_CTL */ |
| 956 | default: |
| 957 | abort(); |
| 958 | } |
| 959 | } |
| 960 | |
| 961 | static |
| 962 | enum event_notifier_error_accounting_status |
| 963 | event_notifier_error_accounting_clear(const struct lttng_trigger *trigger) |
| 964 | { |
| 965 | switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { |
| 966 | case LTTNG_DOMAIN_KERNEL: |
| 967 | return event_notifier_error_accounting_kernel_clear(trigger); |
| 968 | case LTTNG_DOMAIN_UST: |
| 969 | #ifdef HAVE_LIBLTTNG_UST_CTL |
| 970 | return event_notifier_error_accounting_ust_clear(trigger); |
| 971 | #else |
| 972 | return EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; |
| 973 | #endif /* HAVE_LIBLTTNG_UST_CTL */ |
| 974 | default: |
| 975 | abort(); |
| 976 | } |
| 977 | } |
| 978 | |
| 979 | static void free_index_ht_entry(struct rcu_head *head) |
| 980 | { |
| 981 | struct index_ht_entry *entry = caa_container_of(head, |
| 982 | struct index_ht_entry, rcu_head); |
| 983 | |
| 984 | free(entry); |
| 985 | } |
| 986 | |
| 987 | void event_notifier_error_accounting_unregister_event_notifier( |
| 988 | const struct lttng_trigger *trigger) |
| 989 | { |
| 990 | struct lttng_ht_iter iter; |
| 991 | struct lttng_ht_node_u64 *node; |
| 992 | const uint64_t tracer_token = lttng_trigger_get_tracer_token(trigger); |
| 993 | enum event_notifier_error_accounting_status status; |
| 994 | |
| 995 | status = event_notifier_error_accounting_clear(trigger); |
| 996 | if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
| 997 | /* Trigger details already logged by callee on error. */ |
| 998 | ERR("Failed to clear event notifier error counter during unregistration of event notifier: status = '%s'", |
| 999 | error_accounting_status_str(status)); |
| 1000 | } |
| 1001 | |
| 1002 | rcu_read_lock(); |
| 1003 | lttng_ht_lookup(error_counter_indexes_ht, &tracer_token, &iter); |
| 1004 | node = lttng_ht_iter_get_node_u64(&iter); |
| 1005 | if (node) { |
| 1006 | struct index_ht_entry *index_entry = caa_container_of( |
| 1007 | node, typeof(*index_entry), node); |
| 1008 | enum lttng_index_allocator_status index_alloc_status; |
| 1009 | |
| 1010 | index_alloc_status = lttng_index_allocator_release( |
| 1011 | index_allocator, |
| 1012 | index_entry->error_counter_index); |
| 1013 | if (index_alloc_status != LTTNG_INDEX_ALLOCATOR_STATUS_OK) { |
| 1014 | uid_t trigger_owner_uid; |
| 1015 | const char *trigger_name; |
| 1016 | |
| 1017 | get_trigger_info_for_log(trigger, &trigger_name, |
| 1018 | &trigger_owner_uid); |
| 1019 | |
| 1020 | ERR("Failed to release event notifier error counter index: index = %" PRIu64 ", trigger name = '%s', trigger owner uid = %d", |
| 1021 | index_entry->error_counter_index, |
| 1022 | trigger_name, (int) trigger_owner_uid); |
| 1023 | /* Don't exit, perform the rest of the clean-up. */ |
| 1024 | } |
| 1025 | |
| 1026 | lttng_ht_del(error_counter_indexes_ht, &iter); |
| 1027 | call_rcu(&index_entry->rcu_head, free_index_ht_entry); |
| 1028 | } |
| 1029 | |
| 1030 | rcu_read_unlock(); |
| 1031 | } |
| 1032 | |
| 1033 | #ifdef HAVE_LIBLTTNG_UST_CTL |
| 1034 | static void free_error_account_entry(struct rcu_head *head) |
| 1035 | { |
| 1036 | int i; |
| 1037 | struct error_account_entry *entry = |
| 1038 | caa_container_of(head, typeof(*entry), rcu_head); |
| 1039 | |
| 1040 | for (i = 0; i < entry->nr_counter_cpu_fds; i++) { |
| 1041 | ustctl_release_object(-1, entry->cpu_counters[i]); |
| 1042 | free(entry->cpu_counters[i]); |
| 1043 | } |
| 1044 | |
| 1045 | free(entry->cpu_counters); |
| 1046 | |
| 1047 | ustctl_release_object(-1, entry->counter); |
| 1048 | free(entry->counter); |
| 1049 | |
| 1050 | ustctl_destroy_counter(entry->daemon_counter); |
| 1051 | |
| 1052 | free(entry); |
| 1053 | } |
| 1054 | #else |
| 1055 | /* Not called without UST support. */ |
| 1056 | static void free_error_account_entry(struct rcu_head *head) {} |
| 1057 | #endif /* HAVE_LIBLTTNG_UST_CTL */ |
| 1058 | |
| 1059 | void event_notifier_error_accounting_fini(void) |
| 1060 | { |
| 1061 | struct lttng_ht_iter iter; |
| 1062 | struct error_account_entry *uid_entry; |
| 1063 | |
| 1064 | lttng_index_allocator_destroy(index_allocator); |
| 1065 | |
| 1066 | if (kernel_error_accountant.kernel_event_notifier_error_counter_fd) { |
| 1067 | const int ret = close(kernel_error_accountant.kernel_event_notifier_error_counter_fd); |
| 1068 | |
| 1069 | if (ret) { |
| 1070 | PERROR("Failed to close kernel event notifier error counter"); |
| 1071 | } |
| 1072 | } |
| 1073 | |
| 1074 | /* |
| 1075 | * FIXME error account entries are not reference-counted and torn |
| 1076 | * down on last use. They exist from the moment of their first use |
| 1077 | * up until the teardown of the session daemon. |
| 1078 | */ |
| 1079 | rcu_read_lock(); |
| 1080 | cds_lfht_for_each_entry(error_counter_uid_ht->ht, &iter.iter, |
| 1081 | uid_entry, node.node) { |
| 1082 | cds_lfht_del(error_counter_uid_ht->ht, &uid_entry->node.node); |
| 1083 | call_rcu(&uid_entry->rcu_head, free_error_account_entry); |
| 1084 | } |
| 1085 | rcu_read_unlock(); |
| 1086 | lttng_ht_destroy(error_counter_uid_ht); |
| 1087 | |
| 1088 | /* |
| 1089 | * Will assert if some error counter indices were not released (an |
| 1090 | * internal error). |
| 1091 | */ |
| 1092 | lttng_ht_destroy(error_counter_indexes_ht); |
| 1093 | } |