Mercurial > hg > nginx
annotate src/core/ngx_open_file_cache.c @ 1772:25c93614e6b9
open_file_cache_min_uses
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Sat, 22 Dec 2007 13:19:39 +0000 |
| parents | c42431762903 |
| children | 108576aef610 |
| rev | line source |
|---|---|
| 1453 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4 */ | |
| 5 | |
| 6 | |
| 7 #include <ngx_config.h> | |
| 8 #include <ngx_core.h> | |
| 9 #include <ngx_event.h> | |
| 10 | |
| 11 | |
| 12 /* | |
| 13 * open file cache caches | |
| 14 * open file handles with stat() info; | |
| 15 * directories stat() info; | |
| 16 * files and directories errors: not found, access denied, etc. | |
| 17 */ | |
| 18 | |
| 19 | |
| 20 static void ngx_open_file_cache_cleanup(void *data); | |
| 21 static void ngx_open_file_cleanup(void *data); | |
| 22 static void ngx_close_cached_file(ngx_open_file_cache_t *cache, | |
| 1772 | 23 ngx_cached_open_file_t *file, ngx_uint_t min_uses, ngx_log_t *log); |
| 1453 | 24 static ngx_int_t ngx_open_and_stat_file(u_char *name, ngx_open_file_info_t *of, |
| 25 ngx_log_t *log); | |
| 26 static void ngx_expire_old_cached_files(ngx_open_file_cache_t *cache, | |
| 27 ngx_uint_t n, ngx_log_t *log); | |
| 28 static void ngx_open_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
| 29 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel); | |
| 30 static void ngx_open_file_cache_remove(ngx_event_t *ev); | |
| 31 | |
| 32 | |
| 33 ngx_open_file_cache_t * | |
| 34 ngx_open_file_cache_init(ngx_pool_t *pool, ngx_uint_t max, time_t inactive) | |
| 35 { | |
| 36 ngx_pool_cleanup_t *cln; | |
| 37 ngx_open_file_cache_t *cache; | |
| 38 | |
| 39 cache = ngx_palloc(pool, sizeof(ngx_open_file_cache_t)); | |
| 40 if (cache == NULL) { | |
| 41 return NULL; | |
| 42 } | |
| 43 | |
| 1761 | 44 ngx_rbtree_init(&cache->rbtree, &cache->sentinel, |
|
1743
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1458
diff
changeset
|
45 ngx_open_file_cache_rbtree_insert_value); |
| 1453 | 46 |
| 1765 | 47 ngx_queue_init(&cache->expire_queue); |
| 48 | |
| 1453 | 49 cache->current = 0; |
| 50 cache->max = max; | |
| 51 cache->inactive = inactive; | |
| 52 | |
| 53 cln = ngx_pool_cleanup_add(pool, 0); | |
| 54 if (cln == NULL) { | |
| 55 return NULL; | |
| 56 } | |
| 57 | |
| 58 cln->handler = ngx_open_file_cache_cleanup; | |
| 59 cln->data = cache; | |
| 60 | |
| 61 return cache; | |
| 62 } | |
| 63 | |
| 64 | |
| 65 static void | |
| 66 ngx_open_file_cache_cleanup(void *data) | |
| 67 { | |
| 68 ngx_open_file_cache_t *cache = data; | |
| 69 | |
| 1765 | 70 ngx_queue_t *q; |
| 1453 | 71 ngx_cached_open_file_t *file; |
| 72 | |
| 73 ngx_log_debug0(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0, | |
| 74 "open file cache cleanup"); | |
| 75 | |
| 76 for ( ;; ) { | |
| 77 | |
| 1765 | 78 if (ngx_queue_empty(&cache->expire_queue)) { |
| 1766 | 79 break; |
| 1453 | 80 } |
| 81 | |
| 1765 | 82 q = ngx_queue_last(&cache->expire_queue); |
| 83 | |
| 84 file = ngx_queue_data(q, ngx_cached_open_file_t, queue); | |
| 85 | |
| 86 ngx_queue_remove(q); | |
| 1453 | 87 |
| 88 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
| 89 | |
| 90 cache->current--; | |
| 91 | |
| 92 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0, | |
| 93 "delete cached open file: %s", file->name); | |
| 94 | |
| 95 if (!file->err && !file->is_dir) { | |
| 96 file->close = 1; | |
| 97 file->count = 0; | |
| 1772 | 98 ngx_close_cached_file(cache, file, 0, ngx_cycle->log); |
| 1453 | 99 |
| 100 } else { | |
| 101 ngx_free(file->name); | |
| 102 ngx_free(file); | |
| 103 } | |
| 104 } | |
| 105 | |
| 106 if (cache->current) { | |
| 107 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, | |
| 108 "%d items still leave in open file cache", | |
| 109 cache->current); | |
| 110 } | |
| 111 | |
| 112 if (cache->rbtree.root != cache->rbtree.sentinel) { | |
| 113 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, | |
| 114 "rbtree still is not empty in open file cache"); | |
| 115 | |
| 116 } | |
| 117 } | |
| 118 | |
| 119 | |
| 120 ngx_int_t | |
| 121 ngx_open_cached_file(ngx_open_file_cache_t *cache, ngx_str_t *name, | |
| 122 ngx_open_file_info_t *of, ngx_pool_t *pool) | |
| 123 { | |
| 124 time_t now; | |
| 125 uint32_t hash; | |
| 126 ngx_int_t rc; | |
| 127 ngx_rbtree_node_t *node, *sentinel; | |
| 128 ngx_pool_cleanup_t *cln; | |
| 129 ngx_cached_open_file_t *file; | |
| 130 ngx_pool_cleanup_file_t *clnf; | |
| 131 ngx_open_file_cache_event_t *fev; | |
| 132 ngx_open_file_cache_cleanup_t *ofcln; | |
| 133 | |
| 134 of->err = 0; | |
| 135 | |
| 136 if (cache == NULL) { | |
| 137 | |
| 138 cln = ngx_pool_cleanup_add(pool, sizeof(ngx_pool_cleanup_file_t)); | |
| 139 if (cln == NULL) { | |
| 140 return NGX_ERROR; | |
| 141 } | |
| 142 | |
| 143 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
| 144 | |
| 145 if (rc == NGX_OK && !of->is_dir) { | |
| 146 cln->handler = ngx_pool_cleanup_file; | |
| 147 clnf = cln->data; | |
| 148 | |
| 149 clnf->fd = of->fd; | |
| 150 clnf->name = name->data; | |
| 151 clnf->log = pool->log; | |
| 152 } | |
| 153 | |
| 154 return rc; | |
| 155 } | |
| 156 | |
| 157 cln = ngx_pool_cleanup_add(pool, sizeof(ngx_open_file_cache_cleanup_t)); | |
| 158 if (cln == NULL) { | |
| 159 return NGX_ERROR; | |
| 160 } | |
| 161 | |
| 162 hash = ngx_crc32_long(name->data, name->len); | |
| 163 | |
| 164 node = cache->rbtree.root; | |
| 165 sentinel = cache->rbtree.sentinel; | |
| 166 | |
| 167 now = ngx_time(); | |
| 168 | |
| 169 while (node != sentinel) { | |
| 170 | |
| 171 if (hash < node->key) { | |
| 172 node = node->left; | |
| 173 continue; | |
| 174 } | |
| 175 | |
| 176 if (hash > node->key) { | |
| 177 node = node->right; | |
| 178 continue; | |
| 179 } | |
| 180 | |
| 181 /* hash == node->key */ | |
| 182 | |
| 183 do { | |
| 184 file = (ngx_cached_open_file_t *) node; | |
| 185 | |
| 186 rc = ngx_strcmp(name->data, file->name); | |
| 187 | |
| 188 if (rc == 0) { | |
| 189 | |
| 1772 | 190 file->uses++; |
| 191 | |
| 1765 | 192 ngx_queue_remove(&file->queue); |
| 1453 | 193 |
| 1772 | 194 if (file->fd == NGX_INVALID_FILE |
| 195 && file->err == 0 | |
| 196 && !file->is_dir) | |
| 197 { | |
| 198 /* file was not used often enough to be open */ | |
| 199 | |
| 200 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
| 201 | |
| 202 if (rc != NGX_OK && (of->err == 0 || !of->errors)) { | |
| 203 goto failed; | |
| 204 } | |
| 205 | |
| 206 goto update; | |
| 207 } | |
| 208 | |
|
1767
c42431762903
open_file_cache_retest > open_file_cache_valid
Igor Sysoev <igor@sysoev.ru>
parents:
1766
diff
changeset
|
209 if (file->event || now - file->created < of->valid) { |
| 1772 | 210 |
| 1453 | 211 if (file->err == 0) { |
| 1772 | 212 |
| 1453 | 213 of->fd = file->fd; |
| 214 of->uniq = file->uniq; | |
| 215 of->mtime = file->mtime; | |
| 216 of->size = file->size; | |
| 217 | |
| 218 of->is_dir = file->is_dir; | |
| 219 of->is_file = file->is_file; | |
| 220 of->is_link = file->is_link; | |
| 221 of->is_exec = file->is_exec; | |
| 222 | |
| 223 if (!file->is_dir) { | |
| 224 file->count++; | |
| 225 } | |
| 226 | |
| 227 } else { | |
| 228 of->err = file->err; | |
| 229 } | |
| 230 | |
| 231 goto found; | |
| 232 } | |
| 233 | |
| 234 ngx_log_debug4(NGX_LOG_DEBUG_CORE, pool->log, 0, | |
| 235 "retest open file: %s, fd:%d, c:%d, e:%d", | |
| 236 file->name, file->fd, file->count, file->err); | |
| 237 | |
| 238 if (file->is_dir) { | |
| 239 | |
| 240 /* | |
| 241 * chances that directory became file are very small | |
| 242 * so test_dir flag allows to use a single ngx_file_info() | |
| 243 * syscall instead of three syscalls | |
| 244 */ | |
| 245 | |
| 246 of->test_dir = 1; | |
| 247 } | |
| 248 | |
| 249 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
| 250 | |
| 251 if (rc != NGX_OK && (of->err == 0 || !of->errors)) { | |
| 252 goto failed; | |
| 253 } | |
| 254 | |
| 255 if (of->is_dir) { | |
| 256 if (file->is_dir || file->err) { | |
| 257 goto update; | |
| 258 } | |
| 259 | |
| 260 /* file became directory */ | |
| 261 | |
| 262 } else if (of->err == 0) { /* file */ | |
| 263 | |
| 264 if (file->is_dir || file->err) { | |
| 265 goto update; | |
| 266 } | |
| 267 | |
| 268 if (of->uniq == file->uniq | |
| 269 && of->mtime == file->mtime | |
| 270 && of->size == file->size) | |
| 271 { | |
| 272 if (ngx_close_file(of->fd) == NGX_FILE_ERROR) { | |
| 273 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, | |
| 274 ngx_close_file_n " \"%s\" failed", | |
| 275 name->data); | |
| 276 } | |
| 277 | |
| 278 of->fd = file->fd; | |
| 279 file->count++; | |
| 280 | |
| 281 goto renew; | |
| 282 } | |
| 283 | |
| 284 /* file was changed */ | |
| 285 | |
| 286 } else { /* error to cache */ | |
| 287 | |
| 288 if (file->err || file->is_dir) { | |
| 289 goto update; | |
| 290 } | |
| 291 | |
| 292 /* file was removed, etc. */ | |
| 293 } | |
| 294 | |
| 295 if (file->count == 0) { | |
| 296 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { | |
| 297 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, | |
| 298 ngx_close_file_n " \"%s\" failed", | |
| 299 name->data); | |
| 300 } | |
| 301 | |
| 302 goto update; | |
| 303 } | |
| 304 | |
| 305 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
| 306 | |
| 307 cache->current--; | |
| 308 | |
| 309 file->close = 1; | |
| 310 | |
| 311 goto create; | |
| 312 } | |
| 313 | |
| 314 node = (rc < 0) ? node->left : node->right; | |
| 315 | |
| 316 } while (node != sentinel && hash == node->key); | |
| 317 | |
| 318 break; | |
| 319 } | |
| 320 | |
| 321 /* not found */ | |
| 322 | |
| 323 file = NULL; | |
| 324 | |
| 325 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
| 326 | |
| 327 if (rc != NGX_OK && (of->err == 0 || !of->errors)) { | |
| 328 goto failed; | |
| 329 } | |
| 330 | |
| 331 create: | |
| 332 | |
| 333 if (cache->current >= cache->max) { | |
| 334 ngx_expire_old_cached_files(cache, 0, pool->log); | |
| 335 } | |
| 336 | |
| 337 file = ngx_alloc(sizeof(ngx_cached_open_file_t), pool->log); | |
| 338 | |
| 339 if (file == NULL) { | |
| 340 goto failed; | |
| 341 } | |
| 342 | |
| 343 file->name = ngx_alloc(name->len + 1, pool->log); | |
| 344 | |
| 345 if (file->name == NULL) { | |
| 346 ngx_free(file); | |
| 347 file = NULL; | |
| 348 goto failed; | |
| 349 } | |
| 350 | |
| 351 ngx_cpystrn(file->name, name->data, name->len + 1); | |
| 352 | |
| 353 file->node.key = hash; | |
| 354 | |
| 355 ngx_rbtree_insert(&cache->rbtree, &file->node); | |
| 356 | |
| 357 cache->current++; | |
| 358 | |
| 359 file->count = 0; | |
| 1772 | 360 file->uses = 1; |
| 1453 | 361 |
| 362 update: | |
| 363 | |
|
1458
614090b26fbf
test the most relevant condition first
Igor Sysoev <igor@sysoev.ru>
parents:
1457
diff
changeset
|
364 if (of->events |
|
614090b26fbf
test the most relevant condition first
Igor Sysoev <igor@sysoev.ru>
parents:
1457
diff
changeset
|
365 && (ngx_event_flags & NGX_USE_VNODE_EVENT) |
| 1457 | 366 && of->fd != NGX_INVALID_FILE) |
| 367 { | |
| 1453 | 368 file->event = ngx_calloc(sizeof(ngx_event_t), pool->log); |
| 369 if (file->event== NULL) { | |
| 370 goto failed; | |
| 371 } | |
| 372 | |
| 373 fev = ngx_alloc(sizeof(ngx_open_file_cache_event_t), pool->log); | |
| 374 if (fev == NULL) { | |
| 375 goto failed; | |
| 376 } | |
| 377 | |
| 378 fev->fd = of->fd; | |
| 379 fev->file = file; | |
| 380 fev->cache = cache; | |
| 381 | |
| 382 file->event->handler = ngx_open_file_cache_remove; | |
| 383 file->event->data = fev; | |
| 384 | |
| 385 /* | |
| 386 * although vnode event may be called while ngx_cycle->poll | |
| 387 * destruction; however, cleanup procedures are run before any | |
| 388 * memory freeing and events will be canceled. | |
| 389 */ | |
| 390 | |
| 391 file->event->log = ngx_cycle->log; | |
| 392 | |
| 393 if (ngx_add_event(file->event, NGX_VNODE_EVENT, NGX_ONESHOT_EVENT) | |
| 394 != NGX_OK) | |
| 395 { | |
| 396 ngx_free(file->event->data); | |
| 397 ngx_free(file->event); | |
| 398 goto failed; | |
| 399 } | |
| 400 | |
| 401 } else { | |
| 402 file->event = NULL; | |
| 403 } | |
| 404 | |
| 405 file->fd = of->fd; | |
| 406 file->err = of->err; | |
| 407 | |
| 408 if (of->err == 0) { | |
| 409 file->uniq = of->uniq; | |
| 410 file->mtime = of->mtime; | |
| 411 file->size = of->size; | |
| 412 | |
| 413 file->close = 0; | |
| 414 | |
| 415 file->is_dir = of->is_dir; | |
| 416 file->is_file = of->is_file; | |
| 417 file->is_link = of->is_link; | |
| 418 file->is_exec = of->is_exec; | |
| 419 | |
| 420 if (!of->is_dir) { | |
| 421 file->count++; | |
| 422 } | |
| 423 } | |
| 424 | |
| 425 renew: | |
| 426 | |
| 427 file->created = now; | |
| 428 | |
| 429 found: | |
| 430 | |
| 431 file->accessed = now; | |
| 432 | |
| 1765 | 433 ngx_queue_insert_head(&cache->expire_queue, &file->queue); |
| 1453 | 434 |
| 1772 | 435 ngx_log_debug5(NGX_LOG_DEBUG_CORE, pool->log, 0, |
| 436 "cached open file: %s, fd:%d, c:%d, e:%d, u:%d", | |
| 437 file->name, file->fd, file->count, file->err, file->uses); | |
| 1453 | 438 |
| 439 if (of->err == 0) { | |
| 440 | |
| 441 if (!of->is_dir) { | |
| 442 cln->handler = ngx_open_file_cleanup; | |
| 443 ofcln = cln->data; | |
| 444 | |
| 445 ofcln->cache = cache; | |
| 446 ofcln->file = file; | |
| 1772 | 447 ofcln->min_uses = of->min_uses; |
| 1453 | 448 ofcln->log = pool->log; |
| 449 } | |
| 450 | |
| 451 return NGX_OK; | |
| 452 } | |
| 453 | |
| 454 return NGX_ERROR; | |
| 455 | |
| 456 failed: | |
| 457 | |
| 458 if (file && file->count == 0) { | |
| 459 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
| 460 | |
| 461 cache->current--; | |
| 462 | |
| 463 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { | |
| 464 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, | |
| 465 ngx_close_file_n " \"%s\" failed", file->name); | |
| 466 } | |
| 467 | |
| 468 ngx_free(file->name); | |
| 469 ngx_free(file); | |
| 470 } | |
| 471 | |
| 472 if (of->fd != NGX_INVALID_FILE) { | |
| 473 if (ngx_close_file(of->fd) == NGX_FILE_ERROR) { | |
| 474 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, | |
| 475 ngx_close_file_n " \"%s\" failed", name->data); | |
| 476 } | |
| 477 } | |
| 478 | |
| 479 return NGX_ERROR; | |
| 480 } | |
| 481 | |
| 482 | |
| 483 static ngx_int_t | |
| 484 ngx_open_and_stat_file(u_char *name, ngx_open_file_info_t *of, ngx_log_t *log) | |
| 485 { | |
| 486 ngx_fd_t fd; | |
| 487 ngx_file_info_t fi; | |
| 488 | |
| 489 of->fd = NGX_INVALID_FILE; | |
| 490 | |
| 491 if (of->test_dir) { | |
| 492 | |
| 493 if (ngx_file_info(name, &fi) == -1) { | |
| 494 of->err = ngx_errno; | |
| 495 | |
| 496 return NGX_ERROR; | |
| 497 } | |
| 498 | |
| 499 of->uniq = ngx_file_uniq(&fi); | |
| 500 of->mtime = ngx_file_mtime(&fi); | |
| 501 of->size = ngx_file_size(&fi); | |
| 502 of->is_dir = ngx_is_dir(&fi); | |
| 503 of->is_file = ngx_is_file(&fi); | |
| 504 of->is_link = ngx_is_link(&fi); | |
| 505 of->is_exec = ngx_is_exec(&fi); | |
| 506 | |
| 507 if (of->is_dir) { | |
| 508 return NGX_OK; | |
| 509 } | |
| 510 } | |
| 511 | |
| 512 fd = ngx_open_file(name, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0); | |
| 513 | |
| 514 if (fd == NGX_INVALID_FILE) { | |
| 515 of->err = ngx_errno; | |
| 516 return NGX_ERROR; | |
| 517 } | |
| 518 | |
| 519 if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) { | |
| 520 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno, | |
| 521 ngx_fd_info_n " \"%s\" failed", name); | |
| 522 | |
| 523 if (ngx_close_file(fd) == NGX_FILE_ERROR) { | |
| 524 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
| 525 ngx_close_file_n " \"%s\" failed", name); | |
| 526 } | |
| 527 | |
| 528 return NGX_ERROR; | |
| 529 } | |
| 530 | |
| 531 if (ngx_is_dir(&fi)) { | |
| 532 if (ngx_close_file(fd) == NGX_FILE_ERROR) { | |
| 533 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
| 534 ngx_close_file_n " \"%s\" failed", name); | |
| 535 } | |
| 536 | |
| 537 fd = NGX_INVALID_FILE; | |
| 538 } | |
| 539 | |
| 540 of->fd = fd; | |
| 541 of->uniq = ngx_file_uniq(&fi); | |
| 542 of->mtime = ngx_file_mtime(&fi); | |
| 543 of->size = ngx_file_size(&fi); | |
| 544 of->is_dir = ngx_is_dir(&fi); | |
| 545 of->is_file = ngx_is_file(&fi); | |
| 546 of->is_link = ngx_is_link(&fi); | |
| 547 of->is_exec = ngx_is_exec(&fi); | |
| 548 | |
| 549 return NGX_OK; | |
| 550 } | |
| 551 | |
| 552 | |
| 553 static void | |
| 554 ngx_open_file_cleanup(void *data) | |
| 555 { | |
| 556 ngx_open_file_cache_cleanup_t *c = data; | |
| 557 | |
| 558 c->file->count--; | |
| 559 | |
| 1772 | 560 ngx_close_cached_file(c->cache, c->file, c->min_uses, c->log); |
| 1453 | 561 |
| 562 /* drop one or two expired open files */ | |
| 563 ngx_expire_old_cached_files(c->cache, 1, c->log); | |
| 564 } | |
| 565 | |
| 566 | |
| 567 static void | |
| 568 ngx_close_cached_file(ngx_open_file_cache_t *cache, | |
| 1772 | 569 ngx_cached_open_file_t *file, ngx_uint_t min_uses, ngx_log_t *log) |
| 1453 | 570 { |
| 1772 | 571 ngx_log_debug5(NGX_LOG_DEBUG_CORE, log, 0, |
| 572 "close cached open file: %s, fd:%d, c:%d, u:%d, %d", | |
| 573 file->name, file->fd, file->count, file->uses, file->close); | |
| 1453 | 574 |
| 575 if (!file->close) { | |
| 576 | |
| 577 file->accessed = ngx_time(); | |
| 578 | |
| 1765 | 579 ngx_queue_remove(&file->queue); |
| 1453 | 580 |
| 1765 | 581 ngx_queue_insert_head(&cache->expire_queue, &file->queue); |
| 1453 | 582 |
| 1772 | 583 if (file->uses >= min_uses || file->count) { |
| 584 return; | |
| 585 } | |
| 1453 | 586 } |
| 587 | |
| 588 if (file->event) { | |
| 589 (void) ngx_del_event(file->event, NGX_VNODE_EVENT, | |
| 590 file->count ? NGX_FLUSH_EVENT : NGX_CLOSE_EVENT); | |
| 591 | |
| 592 ngx_free(file->event->data); | |
| 593 ngx_free(file->event); | |
| 594 file->event = NULL; | |
| 595 } | |
| 596 | |
| 597 if (file->count) { | |
| 598 return; | |
| 599 } | |
| 600 | |
| 1772 | 601 if (file->fd != NGX_INVALID_FILE) { |
| 602 | |
| 603 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { | |
| 604 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
| 605 ngx_close_file_n " \"%s\" failed", file->name); | |
| 606 } | |
| 607 | |
| 608 file->fd = NGX_INVALID_FILE; | |
| 609 } | |
| 610 | |
| 611 if (!file->close) { | |
| 612 return; | |
| 1453 | 613 } |
| 614 | |
| 615 ngx_free(file->name); | |
| 616 ngx_free(file); | |
| 617 } | |
| 618 | |
| 619 | |
| 620 static void | |
| 621 ngx_expire_old_cached_files(ngx_open_file_cache_t *cache, ngx_uint_t n, | |
| 622 ngx_log_t *log) | |
| 623 { | |
| 624 time_t now; | |
| 1765 | 625 ngx_queue_t *q; |
| 1453 | 626 ngx_cached_open_file_t *file; |
| 627 | |
| 628 now = ngx_time(); | |
| 629 | |
| 630 /* | |
| 631 * n == 1 deletes one or two inactive files | |
| 632 * n == 0 deletes least recently used file by force | |
| 633 * and one or two inactive files | |
| 634 */ | |
| 635 | |
| 636 while (n < 3) { | |
| 637 | |
| 1765 | 638 if (ngx_queue_empty(&cache->expire_queue)) { |
| 1453 | 639 return; |
| 640 } | |
| 641 | |
| 1765 | 642 q = ngx_queue_last(&cache->expire_queue); |
| 643 | |
| 644 file = ngx_queue_data(q, ngx_cached_open_file_t, queue); | |
| 645 | |
| 1453 | 646 if (n++ != 0 && now - file->accessed <= cache->inactive) { |
| 647 return; | |
| 648 } | |
| 649 | |
| 1765 | 650 ngx_queue_remove(q); |
| 1453 | 651 |
| 652 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
| 653 | |
| 654 cache->current--; | |
| 655 | |
| 656 ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, | |
| 657 "expire cached open file: %s", file->name); | |
| 658 | |
| 659 if (!file->err && !file->is_dir) { | |
| 660 file->close = 1; | |
| 1772 | 661 ngx_close_cached_file(cache, file, 0, log); |
| 1453 | 662 |
| 663 } else { | |
| 664 ngx_free(file->name); | |
| 665 ngx_free(file); | |
| 666 } | |
| 667 } | |
| 668 } | |
| 669 | |
| 670 | |
| 671 static void | |
| 672 ngx_open_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
| 673 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) | |
| 674 { | |
| 675 ngx_rbtree_node_t **p; | |
| 676 ngx_cached_open_file_t *file, *file_temp; | |
| 677 | |
| 678 for ( ;; ) { | |
| 679 | |
| 680 if (node->key < temp->key) { | |
| 681 | |
| 682 p = &temp->left; | |
| 683 | |
| 684 } else if (node->key > temp->key) { | |
| 685 | |
| 686 p = &temp->right; | |
| 687 | |
| 688 } else { /* node->key == temp->key */ | |
| 689 | |
| 690 file = (ngx_cached_open_file_t *) node; | |
| 691 file_temp = (ngx_cached_open_file_t *) temp; | |
| 692 | |
| 693 p = (ngx_strcmp(file->name, file_temp->name) < 0) | |
| 694 ? &temp->left : &temp->right; | |
| 695 } | |
| 696 | |
| 697 if (*p == sentinel) { | |
| 698 break; | |
| 699 } | |
| 700 | |
| 701 temp = *p; | |
| 702 } | |
| 703 | |
| 704 *p = node; | |
| 705 node->parent = temp; | |
| 706 node->left = sentinel; | |
| 707 node->right = sentinel; | |
| 708 ngx_rbt_red(node); | |
| 709 } | |
| 710 | |
| 711 | |
| 712 static void | |
| 713 ngx_open_file_cache_remove(ngx_event_t *ev) | |
| 714 { | |
| 715 ngx_cached_open_file_t *file; | |
| 716 ngx_open_file_cache_event_t *fev; | |
| 717 | |
| 718 fev = ev->data; | |
| 719 file = fev->file; | |
| 720 | |
| 1765 | 721 ngx_queue_remove(&file->queue); |
| 1453 | 722 |
| 723 ngx_rbtree_delete(&fev->cache->rbtree, &file->node); | |
| 724 | |
| 725 fev->cache->current--; | |
| 726 | |
| 727 /* NGX_ONESHOT_EVENT was already deleted */ | |
| 728 file->event = NULL; | |
| 729 | |
| 730 file->close = 1; | |
| 731 | |
| 1772 | 732 ngx_close_cached_file(fev->cache, file, 0, ev->log); |
| 1453 | 733 |
| 734 /* free memory only when fev->cache and fev->file are already not needed */ | |
| 735 | |
| 736 ngx_free(ev->data); | |
| 737 ngx_free(ev); | |
| 738 } |