Mercurial > hg > nginx
annotate src/core/ngx_open_file_cache.c @ 1909:cbd321d1e1b3
C++ compatibility
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Mon, 03 Mar 2008 16:32:16 +0000 |
parents | 108576aef610 |
children | e829527ca810 |
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); | |
1775 | 21 static ngx_int_t ngx_open_and_stat_file(u_char *name, ngx_open_file_info_t *of, |
22 ngx_log_t *log); | |
23 static void ngx_open_file_add_event(ngx_open_file_cache_t *cache, | |
24 ngx_cached_open_file_t *file, ngx_open_file_info_t *of, ngx_log_t *log); | |
1453 | 25 static void ngx_open_file_cleanup(void *data); |
26 static void ngx_close_cached_file(ngx_open_file_cache_t *cache, | |
1772 | 27 ngx_cached_open_file_t *file, ngx_uint_t min_uses, ngx_log_t *log); |
1775 | 28 static void ngx_open_file_del_event(ngx_cached_open_file_t *file); |
1453 | 29 static void ngx_expire_old_cached_files(ngx_open_file_cache_t *cache, |
30 ngx_uint_t n, ngx_log_t *log); | |
31 static void ngx_open_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
32 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel); | |
1775 | 33 static ngx_cached_open_file_t * |
34 ngx_open_file_lookup(ngx_open_file_cache_t *cache, ngx_str_t *name, | |
35 uint32_t hash); | |
1453 | 36 static void ngx_open_file_cache_remove(ngx_event_t *ev); |
37 | |
38 | |
39 ngx_open_file_cache_t * | |
40 ngx_open_file_cache_init(ngx_pool_t *pool, ngx_uint_t max, time_t inactive) | |
41 { | |
42 ngx_pool_cleanup_t *cln; | |
43 ngx_open_file_cache_t *cache; | |
44 | |
45 cache = ngx_palloc(pool, sizeof(ngx_open_file_cache_t)); | |
46 if (cache == NULL) { | |
47 return NULL; | |
48 } | |
49 | |
1761 | 50 ngx_rbtree_init(&cache->rbtree, &cache->sentinel, |
1743
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1458
diff
changeset
|
51 ngx_open_file_cache_rbtree_insert_value); |
1453 | 52 |
1765 | 53 ngx_queue_init(&cache->expire_queue); |
54 | |
1453 | 55 cache->current = 0; |
56 cache->max = max; | |
57 cache->inactive = inactive; | |
58 | |
59 cln = ngx_pool_cleanup_add(pool, 0); | |
60 if (cln == NULL) { | |
61 return NULL; | |
62 } | |
63 | |
64 cln->handler = ngx_open_file_cache_cleanup; | |
65 cln->data = cache; | |
66 | |
67 return cache; | |
68 } | |
69 | |
70 | |
71 static void | |
72 ngx_open_file_cache_cleanup(void *data) | |
73 { | |
74 ngx_open_file_cache_t *cache = data; | |
75 | |
1765 | 76 ngx_queue_t *q; |
1453 | 77 ngx_cached_open_file_t *file; |
78 | |
79 ngx_log_debug0(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0, | |
80 "open file cache cleanup"); | |
81 | |
82 for ( ;; ) { | |
83 | |
1765 | 84 if (ngx_queue_empty(&cache->expire_queue)) { |
1766 | 85 break; |
1453 | 86 } |
87 | |
1765 | 88 q = ngx_queue_last(&cache->expire_queue); |
89 | |
90 file = ngx_queue_data(q, ngx_cached_open_file_t, queue); | |
91 | |
92 ngx_queue_remove(q); | |
1453 | 93 |
94 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
95 | |
96 cache->current--; | |
97 | |
98 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0, | |
99 "delete cached open file: %s", file->name); | |
100 | |
101 if (!file->err && !file->is_dir) { | |
102 file->close = 1; | |
103 file->count = 0; | |
1772 | 104 ngx_close_cached_file(cache, file, 0, ngx_cycle->log); |
1453 | 105 |
106 } else { | |
107 ngx_free(file->name); | |
108 ngx_free(file); | |
109 } | |
110 } | |
111 | |
112 if (cache->current) { | |
113 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, | |
114 "%d items still leave in open file cache", | |
115 cache->current); | |
116 } | |
117 | |
118 if (cache->rbtree.root != cache->rbtree.sentinel) { | |
119 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, | |
120 "rbtree still is not empty in open file cache"); | |
121 | |
122 } | |
123 } | |
124 | |
125 | |
126 ngx_int_t | |
127 ngx_open_cached_file(ngx_open_file_cache_t *cache, ngx_str_t *name, | |
128 ngx_open_file_info_t *of, ngx_pool_t *pool) | |
129 { | |
130 time_t now; | |
131 uint32_t hash; | |
132 ngx_int_t rc; | |
133 ngx_pool_cleanup_t *cln; | |
134 ngx_cached_open_file_t *file; | |
135 ngx_pool_cleanup_file_t *clnf; | |
136 ngx_open_file_cache_cleanup_t *ofcln; | |
137 | |
138 of->err = 0; | |
139 | |
140 if (cache == NULL) { | |
141 | |
142 cln = ngx_pool_cleanup_add(pool, sizeof(ngx_pool_cleanup_file_t)); | |
143 if (cln == NULL) { | |
144 return NGX_ERROR; | |
145 } | |
146 | |
147 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
148 | |
149 if (rc == NGX_OK && !of->is_dir) { | |
150 cln->handler = ngx_pool_cleanup_file; | |
151 clnf = cln->data; | |
152 | |
153 clnf->fd = of->fd; | |
154 clnf->name = name->data; | |
155 clnf->log = pool->log; | |
156 } | |
157 | |
158 return rc; | |
159 } | |
160 | |
161 cln = ngx_pool_cleanup_add(pool, sizeof(ngx_open_file_cache_cleanup_t)); | |
162 if (cln == NULL) { | |
163 return NGX_ERROR; | |
164 } | |
165 | |
166 now = ngx_time(); | |
167 | |
1775 | 168 hash = ngx_crc32_long(name->data, name->len); |
169 | |
170 file = ngx_open_file_lookup(cache, name, hash); | |
171 | |
172 if (file) { | |
173 | |
174 file->uses++; | |
175 | |
176 ngx_queue_remove(&file->queue); | |
1453 | 177 |
1775 | 178 if (file->fd == NGX_INVALID_FILE && file->err == 0 && !file->is_dir) { |
179 | |
180 /* file was not used often enough to keep open */ | |
181 | |
182 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
1453 | 183 |
1775 | 184 if (rc != NGX_OK && (of->err == 0 || !of->errors)) { |
185 goto failed; | |
186 } | |
187 | |
188 goto add_event; | |
1453 | 189 } |
190 | |
1775 | 191 if ((file->event && file->use_event) |
192 || (file->event == NULL && now - file->created < of->valid)) | |
193 { | |
194 if (file->err == 0) { | |
1772 | 195 |
1775 | 196 of->fd = file->fd; |
197 of->uniq = file->uniq; | |
198 of->mtime = file->mtime; | |
199 of->size = file->size; | |
1453 | 200 |
1775 | 201 of->is_dir = file->is_dir; |
202 of->is_file = file->is_file; | |
203 of->is_link = file->is_link; | |
204 of->is_exec = file->is_exec; | |
1453 | 205 |
1775 | 206 if (!file->is_dir) { |
207 file->count++; | |
208 ngx_open_file_add_event(cache, file, of, pool->log); | |
1453 | 209 } |
210 | |
1775 | 211 } else { |
212 of->err = file->err; | |
213 } | |
214 | |
215 goto found; | |
216 } | |
217 | |
218 ngx_log_debug4(NGX_LOG_DEBUG_CORE, pool->log, 0, | |
219 "retest open file: %s, fd:%d, c:%d, e:%d", | |
220 file->name, file->fd, file->count, file->err); | |
1453 | 221 |
1775 | 222 if (file->is_dir) { |
223 | |
224 /* | |
225 * chances that directory became file are very small | |
226 * so test_dir flag allows to use a single syscall | |
227 * in ngx_file_info() instead of three syscalls | |
228 */ | |
229 | |
230 of->test_dir = 1; | |
231 } | |
232 | |
233 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
1453 | 234 |
1775 | 235 if (rc != NGX_OK && (of->err == 0 || !of->errors)) { |
236 goto failed; | |
237 } | |
238 | |
239 if (of->is_dir) { | |
240 | |
241 if (file->is_dir || file->err) { | |
242 goto update; | |
243 } | |
244 | |
245 /* file became directory */ | |
1453 | 246 |
1775 | 247 } else if (of->err == 0) { /* file */ |
248 | |
249 if (file->is_dir || file->err) { | |
250 goto add_event; | |
251 } | |
1453 | 252 |
1775 | 253 if (of->uniq == file->uniq |
254 && of->mtime == file->mtime | |
255 && of->size == file->size) | |
256 { | |
257 if (ngx_close_file(of->fd) == NGX_FILE_ERROR) { | |
258 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, | |
259 ngx_close_file_n " \"%s\" failed", | |
260 name->data); | |
1453 | 261 } |
262 | |
1775 | 263 of->fd = file->fd; |
264 file->count++; | |
1453 | 265 |
1775 | 266 if (file->event) { |
267 file->use_event = 1; | |
268 goto renew; | |
1453 | 269 } |
270 | |
1775 | 271 ngx_open_file_add_event(cache, file, of, pool->log); |
272 | |
273 goto renew; | |
274 } | |
1453 | 275 |
1775 | 276 /* file was changed */ |
1453 | 277 |
1775 | 278 } else { /* error to cache */ |
1453 | 279 |
1775 | 280 if (file->err || file->is_dir) { |
281 goto update; | |
1453 | 282 } |
283 | |
1775 | 284 /* file was removed, etc. */ |
285 } | |
286 | |
287 if (file->count == 0) { | |
288 | |
289 ngx_open_file_del_event(file); | |
1453 | 290 |
1775 | 291 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { |
292 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, | |
293 ngx_close_file_n " \"%s\" failed", | |
294 name->data); | |
295 } | |
1453 | 296 |
1775 | 297 goto add_event; |
298 } | |
299 | |
300 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
301 | |
302 cache->current--; | |
303 | |
304 file->close = 1; | |
305 | |
306 goto create; | |
1453 | 307 } |
308 | |
309 /* not found */ | |
310 | |
311 file = NULL; | |
312 | |
313 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
314 | |
315 if (rc != NGX_OK && (of->err == 0 || !of->errors)) { | |
316 goto failed; | |
317 } | |
318 | |
319 create: | |
320 | |
321 if (cache->current >= cache->max) { | |
322 ngx_expire_old_cached_files(cache, 0, pool->log); | |
323 } | |
324 | |
325 file = ngx_alloc(sizeof(ngx_cached_open_file_t), pool->log); | |
326 | |
327 if (file == NULL) { | |
328 goto failed; | |
329 } | |
330 | |
331 file->name = ngx_alloc(name->len + 1, pool->log); | |
332 | |
333 if (file->name == NULL) { | |
334 ngx_free(file); | |
335 file = NULL; | |
336 goto failed; | |
337 } | |
338 | |
339 ngx_cpystrn(file->name, name->data, name->len + 1); | |
340 | |
341 file->node.key = hash; | |
342 | |
343 ngx_rbtree_insert(&cache->rbtree, &file->node); | |
344 | |
345 cache->current++; | |
346 | |
1775 | 347 file->uses = 1; |
1453 | 348 file->count = 0; |
1775 | 349 file->use_event = 0; |
350 file->event = NULL; | |
351 | |
352 add_event: | |
353 | |
354 ngx_open_file_add_event(cache, file, of, pool->log); | |
1453 | 355 |
356 update: | |
357 | |
358 file->fd = of->fd; | |
359 file->err = of->err; | |
360 | |
361 if (of->err == 0) { | |
362 file->uniq = of->uniq; | |
363 file->mtime = of->mtime; | |
364 file->size = of->size; | |
365 | |
366 file->close = 0; | |
367 | |
368 file->is_dir = of->is_dir; | |
369 file->is_file = of->is_file; | |
370 file->is_link = of->is_link; | |
371 file->is_exec = of->is_exec; | |
372 | |
373 if (!of->is_dir) { | |
374 file->count++; | |
375 } | |
376 } | |
377 | |
378 renew: | |
379 | |
380 file->created = now; | |
381 | |
382 found: | |
383 | |
384 file->accessed = now; | |
385 | |
1765 | 386 ngx_queue_insert_head(&cache->expire_queue, &file->queue); |
1453 | 387 |
1772 | 388 ngx_log_debug5(NGX_LOG_DEBUG_CORE, pool->log, 0, |
389 "cached open file: %s, fd:%d, c:%d, e:%d, u:%d", | |
390 file->name, file->fd, file->count, file->err, file->uses); | |
1453 | 391 |
392 if (of->err == 0) { | |
393 | |
394 if (!of->is_dir) { | |
395 cln->handler = ngx_open_file_cleanup; | |
396 ofcln = cln->data; | |
397 | |
398 ofcln->cache = cache; | |
399 ofcln->file = file; | |
1772 | 400 ofcln->min_uses = of->min_uses; |
1453 | 401 ofcln->log = pool->log; |
402 } | |
403 | |
404 return NGX_OK; | |
405 } | |
406 | |
407 return NGX_ERROR; | |
408 | |
409 failed: | |
410 | |
411 if (file && file->count == 0) { | |
412 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
413 | |
414 cache->current--; | |
415 | |
416 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { | |
417 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, | |
418 ngx_close_file_n " \"%s\" failed", file->name); | |
419 } | |
420 | |
421 ngx_free(file->name); | |
422 ngx_free(file); | |
423 } | |
424 | |
425 if (of->fd != NGX_INVALID_FILE) { | |
426 if (ngx_close_file(of->fd) == NGX_FILE_ERROR) { | |
427 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, | |
428 ngx_close_file_n " \"%s\" failed", name->data); | |
429 } | |
430 } | |
431 | |
432 return NGX_ERROR; | |
433 } | |
434 | |
435 | |
436 static ngx_int_t | |
437 ngx_open_and_stat_file(u_char *name, ngx_open_file_info_t *of, ngx_log_t *log) | |
438 { | |
439 ngx_fd_t fd; | |
440 ngx_file_info_t fi; | |
441 | |
442 of->fd = NGX_INVALID_FILE; | |
443 | |
444 if (of->test_dir) { | |
445 | |
446 if (ngx_file_info(name, &fi) == -1) { | |
447 of->err = ngx_errno; | |
448 | |
449 return NGX_ERROR; | |
450 } | |
451 | |
452 of->uniq = ngx_file_uniq(&fi); | |
453 of->mtime = ngx_file_mtime(&fi); | |
454 of->size = ngx_file_size(&fi); | |
455 of->is_dir = ngx_is_dir(&fi); | |
456 of->is_file = ngx_is_file(&fi); | |
457 of->is_link = ngx_is_link(&fi); | |
458 of->is_exec = ngx_is_exec(&fi); | |
459 | |
460 if (of->is_dir) { | |
461 return NGX_OK; | |
462 } | |
463 } | |
464 | |
465 fd = ngx_open_file(name, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0); | |
466 | |
467 if (fd == NGX_INVALID_FILE) { | |
468 of->err = ngx_errno; | |
469 return NGX_ERROR; | |
470 } | |
471 | |
472 if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) { | |
473 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno, | |
474 ngx_fd_info_n " \"%s\" failed", name); | |
475 | |
476 if (ngx_close_file(fd) == NGX_FILE_ERROR) { | |
477 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
478 ngx_close_file_n " \"%s\" failed", name); | |
479 } | |
480 | |
481 return NGX_ERROR; | |
482 } | |
483 | |
484 if (ngx_is_dir(&fi)) { | |
485 if (ngx_close_file(fd) == NGX_FILE_ERROR) { | |
486 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
487 ngx_close_file_n " \"%s\" failed", name); | |
488 } | |
489 | |
490 fd = NGX_INVALID_FILE; | |
491 } | |
492 | |
493 of->fd = fd; | |
494 of->uniq = ngx_file_uniq(&fi); | |
495 of->mtime = ngx_file_mtime(&fi); | |
496 of->size = ngx_file_size(&fi); | |
497 of->is_dir = ngx_is_dir(&fi); | |
498 of->is_file = ngx_is_file(&fi); | |
499 of->is_link = ngx_is_link(&fi); | |
500 of->is_exec = ngx_is_exec(&fi); | |
501 | |
502 return NGX_OK; | |
503 } | |
504 | |
505 | |
1775 | 506 /* |
507 * we ignore any possible event setting error and | |
508 * fallback to usual periodic file retests | |
509 */ | |
510 | |
511 static void | |
512 ngx_open_file_add_event(ngx_open_file_cache_t *cache, | |
513 ngx_cached_open_file_t *file, ngx_open_file_info_t *of, ngx_log_t *log) | |
514 { | |
515 ngx_open_file_cache_event_t *fev; | |
516 | |
517 if (!(ngx_event_flags & NGX_USE_VNODE_EVENT) | |
518 || !of->events | |
519 || file->event | |
520 || of->fd == NGX_INVALID_FILE | |
521 || file->uses < of->min_uses) | |
522 { | |
523 return; | |
524 } | |
525 | |
526 file->event = ngx_calloc(sizeof(ngx_event_t), log); | |
527 if (file->event== NULL) { | |
528 return; | |
529 } | |
530 | |
531 fev = ngx_alloc(sizeof(ngx_open_file_cache_event_t), log); | |
532 if (fev == NULL) { | |
533 ngx_free(file->event); | |
534 file->event = NULL; | |
535 return; | |
536 } | |
537 | |
538 fev->fd = of->fd; | |
539 fev->file = file; | |
540 fev->cache = cache; | |
541 | |
542 file->event->handler = ngx_open_file_cache_remove; | |
543 file->event->data = fev; | |
544 | |
545 /* | |
546 * although vnode event may be called while ngx_cycle->poll | |
547 * destruction, however, cleanup procedures are run before any | |
548 * memory freeing and events will be canceled. | |
549 */ | |
550 | |
551 file->event->log = ngx_cycle->log; | |
552 | |
553 if (ngx_add_event(file->event, NGX_VNODE_EVENT, NGX_ONESHOT_EVENT) | |
554 != NGX_OK) | |
555 { | |
556 ngx_free(file->event->data); | |
557 ngx_free(file->event); | |
558 file->event = NULL; | |
559 return; | |
560 } | |
561 | |
562 /* | |
563 * we do not file->use_event here because there may be a race | |
564 * condition between opening file and adding event, so we rely | |
565 * upon event notification only after first file revalidation | |
566 */ | |
567 | |
568 return; | |
569 } | |
570 | |
571 | |
1453 | 572 static void |
573 ngx_open_file_cleanup(void *data) | |
574 { | |
575 ngx_open_file_cache_cleanup_t *c = data; | |
576 | |
577 c->file->count--; | |
578 | |
1772 | 579 ngx_close_cached_file(c->cache, c->file, c->min_uses, c->log); |
1453 | 580 |
581 /* drop one or two expired open files */ | |
582 ngx_expire_old_cached_files(c->cache, 1, c->log); | |
583 } | |
584 | |
585 | |
586 static void | |
587 ngx_close_cached_file(ngx_open_file_cache_t *cache, | |
1772 | 588 ngx_cached_open_file_t *file, ngx_uint_t min_uses, ngx_log_t *log) |
1453 | 589 { |
1772 | 590 ngx_log_debug5(NGX_LOG_DEBUG_CORE, log, 0, |
591 "close cached open file: %s, fd:%d, c:%d, u:%d, %d", | |
592 file->name, file->fd, file->count, file->uses, file->close); | |
1453 | 593 |
594 if (!file->close) { | |
595 | |
596 file->accessed = ngx_time(); | |
597 | |
1765 | 598 ngx_queue_remove(&file->queue); |
1453 | 599 |
1765 | 600 ngx_queue_insert_head(&cache->expire_queue, &file->queue); |
1453 | 601 |
1772 | 602 if (file->uses >= min_uses || file->count) { |
603 return; | |
604 } | |
1453 | 605 } |
606 | |
1775 | 607 ngx_open_file_del_event(file); |
1453 | 608 |
609 if (file->count) { | |
610 return; | |
611 } | |
612 | |
1772 | 613 if (file->fd != NGX_INVALID_FILE) { |
614 | |
615 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { | |
616 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
617 ngx_close_file_n " \"%s\" failed", file->name); | |
618 } | |
619 | |
620 file->fd = NGX_INVALID_FILE; | |
621 } | |
622 | |
623 if (!file->close) { | |
624 return; | |
1453 | 625 } |
626 | |
627 ngx_free(file->name); | |
628 ngx_free(file); | |
629 } | |
630 | |
631 | |
632 static void | |
1775 | 633 ngx_open_file_del_event(ngx_cached_open_file_t *file) |
634 { | |
635 if (file->event == NULL) { | |
636 return; | |
637 } | |
638 | |
639 (void) ngx_del_event(file->event, NGX_VNODE_EVENT, | |
640 file->count ? NGX_FLUSH_EVENT : NGX_CLOSE_EVENT); | |
641 | |
642 ngx_free(file->event->data); | |
643 ngx_free(file->event); | |
644 file->event = NULL; | |
645 file->use_event = 0; | |
646 } | |
647 | |
648 | |
649 static void | |
1453 | 650 ngx_expire_old_cached_files(ngx_open_file_cache_t *cache, ngx_uint_t n, |
651 ngx_log_t *log) | |
652 { | |
653 time_t now; | |
1765 | 654 ngx_queue_t *q; |
1453 | 655 ngx_cached_open_file_t *file; |
656 | |
657 now = ngx_time(); | |
658 | |
659 /* | |
660 * n == 1 deletes one or two inactive files | |
661 * n == 0 deletes least recently used file by force | |
662 * and one or two inactive files | |
663 */ | |
664 | |
665 while (n < 3) { | |
666 | |
1765 | 667 if (ngx_queue_empty(&cache->expire_queue)) { |
1453 | 668 return; |
669 } | |
670 | |
1765 | 671 q = ngx_queue_last(&cache->expire_queue); |
672 | |
673 file = ngx_queue_data(q, ngx_cached_open_file_t, queue); | |
674 | |
1453 | 675 if (n++ != 0 && now - file->accessed <= cache->inactive) { |
676 return; | |
677 } | |
678 | |
1765 | 679 ngx_queue_remove(q); |
1453 | 680 |
681 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
682 | |
683 cache->current--; | |
684 | |
685 ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, | |
686 "expire cached open file: %s", file->name); | |
687 | |
688 if (!file->err && !file->is_dir) { | |
689 file->close = 1; | |
1772 | 690 ngx_close_cached_file(cache, file, 0, log); |
1453 | 691 |
692 } else { | |
693 ngx_free(file->name); | |
694 ngx_free(file); | |
695 } | |
696 } | |
697 } | |
698 | |
699 | |
700 static void | |
701 ngx_open_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
702 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) | |
703 { | |
704 ngx_rbtree_node_t **p; | |
705 ngx_cached_open_file_t *file, *file_temp; | |
706 | |
707 for ( ;; ) { | |
708 | |
709 if (node->key < temp->key) { | |
710 | |
711 p = &temp->left; | |
712 | |
713 } else if (node->key > temp->key) { | |
714 | |
715 p = &temp->right; | |
716 | |
717 } else { /* node->key == temp->key */ | |
718 | |
719 file = (ngx_cached_open_file_t *) node; | |
720 file_temp = (ngx_cached_open_file_t *) temp; | |
721 | |
722 p = (ngx_strcmp(file->name, file_temp->name) < 0) | |
723 ? &temp->left : &temp->right; | |
724 } | |
725 | |
726 if (*p == sentinel) { | |
727 break; | |
728 } | |
729 | |
730 temp = *p; | |
731 } | |
732 | |
733 *p = node; | |
734 node->parent = temp; | |
735 node->left = sentinel; | |
736 node->right = sentinel; | |
737 ngx_rbt_red(node); | |
738 } | |
739 | |
740 | |
1775 | 741 static ngx_cached_open_file_t * |
742 ngx_open_file_lookup(ngx_open_file_cache_t *cache, ngx_str_t *name, | |
743 uint32_t hash) | |
744 { | |
745 ngx_int_t rc; | |
746 ngx_rbtree_node_t *node, *sentinel; | |
747 ngx_cached_open_file_t *file; | |
748 | |
749 node = cache->rbtree.root; | |
750 sentinel = cache->rbtree.sentinel; | |
751 | |
752 while (node != sentinel) { | |
753 | |
754 if (hash < node->key) { | |
755 node = node->left; | |
756 continue; | |
757 } | |
758 | |
759 if (hash > node->key) { | |
760 node = node->right; | |
761 continue; | |
762 } | |
763 | |
764 /* hash == node->key */ | |
765 | |
766 do { | |
767 file = (ngx_cached_open_file_t *) node; | |
768 | |
769 rc = ngx_strcmp(name->data, file->name); | |
770 | |
771 if (rc == 0) { | |
772 return file; | |
773 } | |
774 | |
775 node = (rc < 0) ? node->left : node->right; | |
776 | |
777 } while (node != sentinel && hash == node->key); | |
778 | |
779 break; | |
780 } | |
781 | |
782 return NULL; | |
783 } | |
784 | |
785 | |
1453 | 786 static void |
787 ngx_open_file_cache_remove(ngx_event_t *ev) | |
788 { | |
789 ngx_cached_open_file_t *file; | |
790 ngx_open_file_cache_event_t *fev; | |
791 | |
792 fev = ev->data; | |
793 file = fev->file; | |
794 | |
1765 | 795 ngx_queue_remove(&file->queue); |
1453 | 796 |
797 ngx_rbtree_delete(&fev->cache->rbtree, &file->node); | |
798 | |
799 fev->cache->current--; | |
800 | |
801 /* NGX_ONESHOT_EVENT was already deleted */ | |
802 file->event = NULL; | |
803 | |
804 file->close = 1; | |
805 | |
1772 | 806 ngx_close_cached_file(fev->cache, file, 0, ev->log); |
1453 | 807 |
808 /* free memory only when fev->cache and fev->file are already not needed */ | |
809 | |
810 ngx_free(ev->data); | |
811 ngx_free(ev); | |
812 } |