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