332
|
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
|
575
|
20 #define NGX_MIN_READ_AHEAD (128 * 1024)
|
|
21
|
|
22
|
332
|
23 static void ngx_open_file_cache_cleanup(void *data);
|
358
|
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_open_file_add_event(ngx_open_file_cache_t *cache,
|
|
27 ngx_cached_open_file_t *file, ngx_open_file_info_t *of, ngx_log_t *log);
|
332
|
28 static void ngx_open_file_cleanup(void *data);
|
|
29 static void ngx_close_cached_file(ngx_open_file_cache_t *cache,
|
358
|
30 ngx_cached_open_file_t *file, ngx_uint_t min_uses, ngx_log_t *log);
|
|
31 static void ngx_open_file_del_event(ngx_cached_open_file_t *file);
|
332
|
32 static void ngx_expire_old_cached_files(ngx_open_file_cache_t *cache,
|
|
33 ngx_uint_t n, ngx_log_t *log);
|
|
34 static void ngx_open_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp,
|
|
35 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel);
|
358
|
36 static ngx_cached_open_file_t *
|
|
37 ngx_open_file_lookup(ngx_open_file_cache_t *cache, ngx_str_t *name,
|
|
38 uint32_t hash);
|
332
|
39 static void ngx_open_file_cache_remove(ngx_event_t *ev);
|
|
40
|
|
41
|
|
42 ngx_open_file_cache_t *
|
|
43 ngx_open_file_cache_init(ngx_pool_t *pool, ngx_uint_t max, time_t inactive)
|
|
44 {
|
|
45 ngx_pool_cleanup_t *cln;
|
|
46 ngx_open_file_cache_t *cache;
|
|
47
|
|
48 cache = ngx_palloc(pool, sizeof(ngx_open_file_cache_t));
|
|
49 if (cache == NULL) {
|
|
50 return NULL;
|
|
51 }
|
|
52
|
358
|
53 ngx_rbtree_init(&cache->rbtree, &cache->sentinel,
|
|
54 ngx_open_file_cache_rbtree_insert_value);
|
332
|
55
|
358
|
56 ngx_queue_init(&cache->expire_queue);
|
332
|
57
|
|
58 cache->current = 0;
|
|
59 cache->max = max;
|
|
60 cache->inactive = inactive;
|
|
61
|
|
62 cln = ngx_pool_cleanup_add(pool, 0);
|
|
63 if (cln == NULL) {
|
|
64 return NULL;
|
|
65 }
|
|
66
|
|
67 cln->handler = ngx_open_file_cache_cleanup;
|
|
68 cln->data = cache;
|
|
69
|
|
70 return cache;
|
|
71 }
|
|
72
|
|
73
|
|
74 static void
|
|
75 ngx_open_file_cache_cleanup(void *data)
|
|
76 {
|
|
77 ngx_open_file_cache_t *cache = data;
|
|
78
|
358
|
79 ngx_queue_t *q;
|
332
|
80 ngx_cached_open_file_t *file;
|
|
81
|
|
82 ngx_log_debug0(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0,
|
|
83 "open file cache cleanup");
|
|
84
|
|
85 for ( ;; ) {
|
|
86
|
358
|
87 if (ngx_queue_empty(&cache->expire_queue)) {
|
332
|
88 break;
|
|
89 }
|
|
90
|
358
|
91 q = ngx_queue_last(&cache->expire_queue);
|
|
92
|
|
93 file = ngx_queue_data(q, ngx_cached_open_file_t, queue);
|
|
94
|
|
95 ngx_queue_remove(q);
|
332
|
96
|
|
97 ngx_rbtree_delete(&cache->rbtree, &file->node);
|
|
98
|
|
99 cache->current--;
|
|
100
|
|
101 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0,
|
|
102 "delete cached open file: %s", file->name);
|
|
103
|
|
104 if (!file->err && !file->is_dir) {
|
|
105 file->close = 1;
|
|
106 file->count = 0;
|
358
|
107 ngx_close_cached_file(cache, file, 0, ngx_cycle->log);
|
332
|
108
|
|
109 } else {
|
|
110 ngx_free(file->name);
|
|
111 ngx_free(file);
|
|
112 }
|
|
113 }
|
|
114
|
|
115 if (cache->current) {
|
|
116 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
|
|
117 "%d items still leave in open file cache",
|
|
118 cache->current);
|
|
119 }
|
|
120
|
|
121 if (cache->rbtree.root != cache->rbtree.sentinel) {
|
|
122 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
|
|
123 "rbtree still is not empty in open file cache");
|
|
124
|
|
125 }
|
|
126 }
|
|
127
|
|
128
|
|
129 ngx_int_t
|
|
130 ngx_open_cached_file(ngx_open_file_cache_t *cache, ngx_str_t *name,
|
|
131 ngx_open_file_info_t *of, ngx_pool_t *pool)
|
|
132 {
|
|
133 time_t now;
|
|
134 uint32_t hash;
|
|
135 ngx_int_t rc;
|
522
|
136 ngx_file_info_t fi;
|
332
|
137 ngx_pool_cleanup_t *cln;
|
|
138 ngx_cached_open_file_t *file;
|
|
139 ngx_pool_cleanup_file_t *clnf;
|
|
140 ngx_open_file_cache_cleanup_t *ofcln;
|
|
141
|
384
|
142 of->fd = NGX_INVALID_FILE;
|
332
|
143 of->err = 0;
|
|
144
|
|
145 if (cache == NULL) {
|
|
146
|
522
|
147 if (of->test_only) {
|
|
148
|
524
|
149 if (ngx_file_info(name->data, &fi) == NGX_FILE_ERROR) {
|
522
|
150 of->err = ngx_errno;
|
|
151 of->failed = ngx_file_info_n;
|
|
152 return NGX_ERROR;
|
|
153 }
|
|
154
|
|
155 of->uniq = ngx_file_uniq(&fi);
|
|
156 of->mtime = ngx_file_mtime(&fi);
|
|
157 of->size = ngx_file_size(&fi);
|
|
158 of->is_dir = ngx_is_dir(&fi);
|
|
159 of->is_file = ngx_is_file(&fi);
|
|
160 of->is_link = ngx_is_link(&fi);
|
|
161 of->is_exec = ngx_is_exec(&fi);
|
|
162
|
|
163 return NGX_OK;
|
|
164 }
|
|
165
|
332
|
166 cln = ngx_pool_cleanup_add(pool, sizeof(ngx_pool_cleanup_file_t));
|
|
167 if (cln == NULL) {
|
|
168 return NGX_ERROR;
|
|
169 }
|
|
170
|
|
171 rc = ngx_open_and_stat_file(name->data, of, pool->log);
|
|
172
|
|
173 if (rc == NGX_OK && !of->is_dir) {
|
|
174 cln->handler = ngx_pool_cleanup_file;
|
|
175 clnf = cln->data;
|
|
176
|
|
177 clnf->fd = of->fd;
|
|
178 clnf->name = name->data;
|
|
179 clnf->log = pool->log;
|
|
180 }
|
|
181
|
|
182 return rc;
|
|
183 }
|
|
184
|
|
185 cln = ngx_pool_cleanup_add(pool, sizeof(ngx_open_file_cache_cleanup_t));
|
|
186 if (cln == NULL) {
|
|
187 return NGX_ERROR;
|
|
188 }
|
|
189
|
|
190 now = ngx_time();
|
|
191
|
358
|
192 hash = ngx_crc32_long(name->data, name->len);
|
|
193
|
|
194 file = ngx_open_file_lookup(cache, name, hash);
|
|
195
|
|
196 if (file) {
|
|
197
|
|
198 file->uses++;
|
|
199
|
|
200 ngx_queue_remove(&file->queue);
|
332
|
201
|
358
|
202 if (file->fd == NGX_INVALID_FILE && file->err == 0 && !file->is_dir) {
|
|
203
|
|
204 /* file was not used often enough to keep open */
|
|
205
|
|
206 rc = ngx_open_and_stat_file(name->data, of, pool->log);
|
332
|
207
|
358
|
208 if (rc != NGX_OK && (of->err == 0 || !of->errors)) {
|
|
209 goto failed;
|
|
210 }
|
|
211
|
|
212 goto add_event;
|
332
|
213 }
|
|
214
|
384
|
215 if (file->use_event
|
|
216 || (file->event == NULL
|
|
217 && (of->uniq == 0 || of->uniq == file->uniq)
|
|
218 && now - file->created < of->valid))
|
358
|
219 {
|
|
220 if (file->err == 0) {
|
332
|
221
|
358
|
222 of->fd = file->fd;
|
|
223 of->uniq = file->uniq;
|
|
224 of->mtime = file->mtime;
|
|
225 of->size = file->size;
|
332
|
226
|
358
|
227 of->is_dir = file->is_dir;
|
|
228 of->is_file = file->is_file;
|
|
229 of->is_link = file->is_link;
|
|
230 of->is_exec = file->is_exec;
|
437
|
231 of->is_directio = file->is_directio;
|
332
|
232
|
358
|
233 if (!file->is_dir) {
|
|
234 file->count++;
|
|
235 ngx_open_file_add_event(cache, file, of, pool->log);
|
332
|
236 }
|
|
237
|
358
|
238 } else {
|
|
239 of->err = file->err;
|
524
|
240 of->failed = ngx_open_file_n;
|
358
|
241 }
|
|
242
|
|
243 goto found;
|
|
244 }
|
|
245
|
|
246 ngx_log_debug4(NGX_LOG_DEBUG_CORE, pool->log, 0,
|
|
247 "retest open file: %s, fd:%d, c:%d, e:%d",
|
|
248 file->name, file->fd, file->count, file->err);
|
|
249
|
|
250 if (file->is_dir) {
|
|
251
|
|
252 /*
|
|
253 * chances that directory became file are very small
|
|
254 * so test_dir flag allows to use a single syscall
|
|
255 * in ngx_file_info() instead of three syscalls
|
|
256 */
|
|
257
|
|
258 of->test_dir = 1;
|
|
259 }
|
|
260
|
384
|
261 of->fd = file->fd;
|
|
262 of->uniq = file->uniq;
|
|
263
|
358
|
264 rc = ngx_open_and_stat_file(name->data, of, pool->log);
|
332
|
265
|
358
|
266 if (rc != NGX_OK && (of->err == 0 || !of->errors)) {
|
|
267 goto failed;
|
|
268 }
|
|
269
|
|
270 if (of->is_dir) {
|
|
271
|
|
272 if (file->is_dir || file->err) {
|
|
273 goto update;
|
|
274 }
|
|
275
|
|
276 /* file became directory */
|
|
277
|
|
278 } else if (of->err == 0) { /* file */
|
|
279
|
|
280 if (file->is_dir || file->err) {
|
|
281 goto add_event;
|
|
282 }
|
|
283
|
384
|
284 if (of->uniq == file->uniq) {
|
332
|
285
|
358
|
286 file->count++;
|
332
|
287
|
358
|
288 if (file->event) {
|
|
289 file->use_event = 1;
|
332
|
290 }
|
|
291
|
358
|
292 goto renew;
|
|
293 }
|
332
|
294
|
358
|
295 /* file was changed */
|
332
|
296
|
358
|
297 } else { /* error to cache */
|
332
|
298
|
358
|
299 if (file->err || file->is_dir) {
|
|
300 goto update;
|
332
|
301 }
|
|
302
|
358
|
303 /* file was removed, etc. */
|
|
304 }
|
|
305
|
|
306 if (file->count == 0) {
|
|
307
|
|
308 ngx_open_file_del_event(file);
|
332
|
309
|
358
|
310 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) {
|
|
311 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno,
|
|
312 ngx_close_file_n " \"%s\" failed",
|
|
313 name->data);
|
|
314 }
|
332
|
315
|
358
|
316 goto add_event;
|
|
317 }
|
|
318
|
|
319 ngx_rbtree_delete(&cache->rbtree, &file->node);
|
|
320
|
|
321 cache->current--;
|
|
322
|
|
323 file->close = 1;
|
|
324
|
|
325 goto create;
|
332
|
326 }
|
|
327
|
|
328 /* not found */
|
|
329
|
|
330 rc = ngx_open_and_stat_file(name->data, of, pool->log);
|
|
331
|
|
332 if (rc != NGX_OK && (of->err == 0 || !of->errors)) {
|
|
333 goto failed;
|
|
334 }
|
|
335
|
|
336 create:
|
|
337
|
|
338 if (cache->current >= cache->max) {
|
|
339 ngx_expire_old_cached_files(cache, 0, pool->log);
|
|
340 }
|
|
341
|
|
342 file = ngx_alloc(sizeof(ngx_cached_open_file_t), pool->log);
|
|
343
|
|
344 if (file == NULL) {
|
|
345 goto failed;
|
|
346 }
|
|
347
|
|
348 file->name = ngx_alloc(name->len + 1, pool->log);
|
|
349
|
|
350 if (file->name == NULL) {
|
|
351 ngx_free(file);
|
|
352 file = NULL;
|
|
353 goto failed;
|
|
354 }
|
|
355
|
|
356 ngx_cpystrn(file->name, name->data, name->len + 1);
|
|
357
|
|
358 file->node.key = hash;
|
|
359
|
|
360 ngx_rbtree_insert(&cache->rbtree, &file->node);
|
|
361
|
|
362 cache->current++;
|
|
363
|
358
|
364 file->uses = 1;
|
332
|
365 file->count = 0;
|
540
|
366 file->use_event = 0;
|
358
|
367 file->event = NULL;
|
|
368
|
|
369 add_event:
|
|
370
|
|
371 ngx_open_file_add_event(cache, file, of, pool->log);
|
332
|
372
|
|
373 update:
|
|
374
|
|
375 file->fd = of->fd;
|
|
376 file->err = of->err;
|
|
377
|
|
378 if (of->err == 0) {
|
|
379 file->uniq = of->uniq;
|
|
380 file->mtime = of->mtime;
|
|
381 file->size = of->size;
|
|
382
|
|
383 file->close = 0;
|
|
384
|
|
385 file->is_dir = of->is_dir;
|
|
386 file->is_file = of->is_file;
|
|
387 file->is_link = of->is_link;
|
|
388 file->is_exec = of->is_exec;
|
437
|
389 file->is_directio = of->is_directio;
|
332
|
390
|
|
391 if (!of->is_dir) {
|
|
392 file->count++;
|
|
393 }
|
|
394 }
|
|
395
|
|
396 renew:
|
|
397
|
|
398 file->created = now;
|
|
399
|
|
400 found:
|
|
401
|
|
402 file->accessed = now;
|
|
403
|
358
|
404 ngx_queue_insert_head(&cache->expire_queue, &file->queue);
|
332
|
405
|
358
|
406 ngx_log_debug5(NGX_LOG_DEBUG_CORE, pool->log, 0,
|
|
407 "cached open file: %s, fd:%d, c:%d, e:%d, u:%d",
|
|
408 file->name, file->fd, file->count, file->err, file->uses);
|
332
|
409
|
|
410 if (of->err == 0) {
|
|
411
|
|
412 if (!of->is_dir) {
|
|
413 cln->handler = ngx_open_file_cleanup;
|
|
414 ofcln = cln->data;
|
|
415
|
|
416 ofcln->cache = cache;
|
|
417 ofcln->file = file;
|
358
|
418 ofcln->min_uses = of->min_uses;
|
332
|
419 ofcln->log = pool->log;
|
|
420 }
|
|
421
|
|
422 return NGX_OK;
|
|
423 }
|
|
424
|
|
425 return NGX_ERROR;
|
|
426
|
|
427 failed:
|
|
428
|
374
|
429 if (file) {
|
332
|
430 ngx_rbtree_delete(&cache->rbtree, &file->node);
|
|
431
|
|
432 cache->current--;
|
|
433
|
374
|
434 if (file->count == 0) {
|
|
435
|
376
|
436 if (file->fd != NGX_INVALID_FILE) {
|
|
437 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) {
|
|
438 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno,
|
|
439 ngx_close_file_n " \"%s\" failed",
|
374
|
440 file->name);
|
376
|
441 }
|
|
442 }
|
374
|
443
|
|
444 ngx_free(file->name);
|
|
445 ngx_free(file);
|
|
446
|
|
447 } else {
|
|
448 file->close = 1;
|
332
|
449 }
|
|
450 }
|
|
451
|
|
452 if (of->fd != NGX_INVALID_FILE) {
|
|
453 if (ngx_close_file(of->fd) == NGX_FILE_ERROR) {
|
|
454 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno,
|
|
455 ngx_close_file_n " \"%s\" failed", name->data);
|
|
456 }
|
|
457 }
|
|
458
|
|
459 return NGX_ERROR;
|
|
460 }
|
|
461
|
|
462
|
|
463 static ngx_int_t
|
|
464 ngx_open_and_stat_file(u_char *name, ngx_open_file_info_t *of, ngx_log_t *log)
|
|
465 {
|
|
466 ngx_fd_t fd;
|
|
467 ngx_file_info_t fi;
|
|
468
|
384
|
469 if (of->fd != NGX_INVALID_FILE) {
|
332
|
470
|
524
|
471 if (ngx_file_info(name, &fi) == NGX_FILE_ERROR) {
|
522
|
472 of->failed = ngx_file_info_n;
|
384
|
473 goto failed;
|
332
|
474 }
|
|
475
|
384
|
476 if (of->uniq == ngx_file_uniq(&fi)) {
|
|
477 goto done;
|
|
478 }
|
|
479
|
|
480 } else if (of->test_dir) {
|
|
481
|
524
|
482 if (ngx_file_info(name, &fi) == NGX_FILE_ERROR) {
|
522
|
483 of->failed = ngx_file_info_n;
|
384
|
484 goto failed;
|
|
485 }
|
332
|
486
|
476
|
487 if (ngx_is_dir(&fi)) {
|
384
|
488 goto done;
|
332
|
489 }
|
|
490 }
|
|
491
|
384
|
492 if (!of->log) {
|
611
|
493
|
|
494 /*
|
|
495 * Use non-blocking open() not to hang on FIFO files, etc.
|
|
496 * This flag has no effect on a regular files.
|
|
497 */
|
|
498
|
|
499 fd = ngx_open_file(name, NGX_FILE_RDONLY|NGX_FILE_NONBLOCK,
|
|
500 NGX_FILE_OPEN, 0);
|
384
|
501
|
|
502 } else {
|
509
|
503 fd = ngx_open_file(name, NGX_FILE_APPEND, NGX_FILE_CREATE_OR_OPEN,
|
384
|
504 NGX_FILE_DEFAULT_ACCESS);
|
|
505 }
|
332
|
506
|
|
507 if (fd == NGX_INVALID_FILE) {
|
522
|
508 of->failed = ngx_open_file_n;
|
384
|
509 goto failed;
|
332
|
510 }
|
|
511
|
|
512 if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
|
|
513 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
|
|
514 ngx_fd_info_n " \"%s\" failed", name);
|
|
515
|
|
516 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
|
|
517 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
|
518 ngx_close_file_n " \"%s\" failed", name);
|
|
519 }
|
|
520
|
384
|
521 of->fd = NGX_INVALID_FILE;
|
|
522
|
332
|
523 return NGX_ERROR;
|
|
524 }
|
|
525
|
|
526 if (ngx_is_dir(&fi)) {
|
|
527 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
|
|
528 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
|
529 ngx_close_file_n " \"%s\" failed", name);
|
|
530 }
|
|
531
|
384
|
532 of->fd = NGX_INVALID_FILE;
|
|
533
|
|
534 } else {
|
|
535 of->fd = fd;
|
390
|
536
|
575
|
537 if (of->read_ahead && ngx_file_size(&fi) > NGX_MIN_READ_AHEAD) {
|
|
538 if (ngx_read_ahead(fd, of->read_ahead) == NGX_ERROR) {
|
|
539 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
|
540 ngx_read_ahead_n " \"%s\" failed", name);
|
|
541 }
|
|
542 }
|
|
543
|
390
|
544 if (of->directio <= ngx_file_size(&fi)) {
|
573
|
545 if (ngx_directio_on(fd) == NGX_FILE_ERROR) {
|
390
|
546 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
437
|
547 ngx_directio_on_n " \"%s\" failed", name);
|
429
|
548
|
|
549 } else {
|
|
550 of->is_directio = 1;
|
390
|
551 }
|
|
552 }
|
332
|
553 }
|
|
554
|
384
|
555 done:
|
|
556
|
332
|
557 of->uniq = ngx_file_uniq(&fi);
|
|
558 of->mtime = ngx_file_mtime(&fi);
|
|
559 of->size = ngx_file_size(&fi);
|
|
560 of->is_dir = ngx_is_dir(&fi);
|
|
561 of->is_file = ngx_is_file(&fi);
|
|
562 of->is_link = ngx_is_link(&fi);
|
|
563 of->is_exec = ngx_is_exec(&fi);
|
|
564
|
|
565 return NGX_OK;
|
384
|
566
|
|
567 failed:
|
|
568
|
|
569 of->fd = NGX_INVALID_FILE;
|
|
570 of->err = ngx_errno;
|
|
571
|
|
572 return NGX_ERROR;
|
332
|
573 }
|
|
574
|
|
575
|
358
|
576 /*
|
|
577 * we ignore any possible event setting error and
|
|
578 * fallback to usual periodic file retests
|
|
579 */
|
|
580
|
|
581 static void
|
|
582 ngx_open_file_add_event(ngx_open_file_cache_t *cache,
|
|
583 ngx_cached_open_file_t *file, ngx_open_file_info_t *of, ngx_log_t *log)
|
|
584 {
|
|
585 ngx_open_file_cache_event_t *fev;
|
|
586
|
|
587 if (!(ngx_event_flags & NGX_USE_VNODE_EVENT)
|
|
588 || !of->events
|
|
589 || file->event
|
|
590 || of->fd == NGX_INVALID_FILE
|
|
591 || file->uses < of->min_uses)
|
|
592 {
|
|
593 return;
|
|
594 }
|
|
595
|
384
|
596 file->use_event = 0;
|
|
597
|
358
|
598 file->event = ngx_calloc(sizeof(ngx_event_t), log);
|
|
599 if (file->event== NULL) {
|
|
600 return;
|
|
601 }
|
|
602
|
|
603 fev = ngx_alloc(sizeof(ngx_open_file_cache_event_t), log);
|
|
604 if (fev == NULL) {
|
|
605 ngx_free(file->event);
|
|
606 file->event = NULL;
|
|
607 return;
|
|
608 }
|
|
609
|
|
610 fev->fd = of->fd;
|
|
611 fev->file = file;
|
|
612 fev->cache = cache;
|
|
613
|
|
614 file->event->handler = ngx_open_file_cache_remove;
|
|
615 file->event->data = fev;
|
|
616
|
|
617 /*
|
|
618 * although vnode event may be called while ngx_cycle->poll
|
|
619 * destruction, however, cleanup procedures are run before any
|
|
620 * memory freeing and events will be canceled.
|
|
621 */
|
|
622
|
|
623 file->event->log = ngx_cycle->log;
|
|
624
|
|
625 if (ngx_add_event(file->event, NGX_VNODE_EVENT, NGX_ONESHOT_EVENT)
|
|
626 != NGX_OK)
|
|
627 {
|
|
628 ngx_free(file->event->data);
|
|
629 ngx_free(file->event);
|
|
630 file->event = NULL;
|
|
631 return;
|
|
632 }
|
|
633
|
|
634 /*
|
384
|
635 * we do not set file->use_event here because there may be a race
|
|
636 * condition: a file may be deleted between opening the file and
|
|
637 * adding event, so we rely upon event notification only after
|
|
638 * one file revalidation on next file access
|
358
|
639 */
|
|
640
|
|
641 return;
|
|
642 }
|
|
643
|
|
644
|
332
|
645 static void
|
|
646 ngx_open_file_cleanup(void *data)
|
|
647 {
|
|
648 ngx_open_file_cache_cleanup_t *c = data;
|
|
649
|
|
650 c->file->count--;
|
|
651
|
358
|
652 ngx_close_cached_file(c->cache, c->file, c->min_uses, c->log);
|
332
|
653
|
|
654 /* drop one or two expired open files */
|
|
655 ngx_expire_old_cached_files(c->cache, 1, c->log);
|
|
656 }
|
|
657
|
|
658
|
|
659 static void
|
|
660 ngx_close_cached_file(ngx_open_file_cache_t *cache,
|
358
|
661 ngx_cached_open_file_t *file, ngx_uint_t min_uses, ngx_log_t *log)
|
332
|
662 {
|
358
|
663 ngx_log_debug5(NGX_LOG_DEBUG_CORE, log, 0,
|
|
664 "close cached open file: %s, fd:%d, c:%d, u:%d, %d",
|
|
665 file->name, file->fd, file->count, file->uses, file->close);
|
332
|
666
|
|
667 if (!file->close) {
|
|
668
|
|
669 file->accessed = ngx_time();
|
|
670
|
358
|
671 ngx_queue_remove(&file->queue);
|
332
|
672
|
358
|
673 ngx_queue_insert_head(&cache->expire_queue, &file->queue);
|
332
|
674
|
358
|
675 if (file->uses >= min_uses || file->count) {
|
|
676 return;
|
332
|
677 }
|
|
678 }
|
|
679
|
358
|
680 ngx_open_file_del_event(file);
|
332
|
681
|
|
682 if (file->count) {
|
|
683 return;
|
|
684 }
|
|
685
|
358
|
686 if (file->fd != NGX_INVALID_FILE) {
|
|
687
|
|
688 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) {
|
|
689 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
|
|
690 ngx_close_file_n " \"%s\" failed", file->name);
|
|
691 }
|
|
692
|
|
693 file->fd = NGX_INVALID_FILE;
|
|
694 }
|
|
695
|
|
696 if (!file->close) {
|
|
697 return;
|
332
|
698 }
|
|
699
|
|
700 ngx_free(file->name);
|
|
701 ngx_free(file);
|
|
702 }
|
|
703
|
|
704
|
|
705 static void
|
358
|
706 ngx_open_file_del_event(ngx_cached_open_file_t *file)
|
|
707 {
|
|
708 if (file->event == NULL) {
|
|
709 return;
|
|
710 }
|
|
711
|
|
712 (void) ngx_del_event(file->event, NGX_VNODE_EVENT,
|
|
713 file->count ? NGX_FLUSH_EVENT : NGX_CLOSE_EVENT);
|
|
714
|
|
715 ngx_free(file->event->data);
|
|
716 ngx_free(file->event);
|
|
717 file->event = NULL;
|
|
718 file->use_event = 0;
|
|
719 }
|
|
720
|
|
721
|
|
722 static void
|
332
|
723 ngx_expire_old_cached_files(ngx_open_file_cache_t *cache, ngx_uint_t n,
|
|
724 ngx_log_t *log)
|
|
725 {
|
|
726 time_t now;
|
358
|
727 ngx_queue_t *q;
|
332
|
728 ngx_cached_open_file_t *file;
|
|
729
|
|
730 now = ngx_time();
|
|
731
|
|
732 /*
|
|
733 * n == 1 deletes one or two inactive files
|
|
734 * n == 0 deletes least recently used file by force
|
|
735 * and one or two inactive files
|
|
736 */
|
|
737
|
|
738 while (n < 3) {
|
|
739
|
358
|
740 if (ngx_queue_empty(&cache->expire_queue)) {
|
332
|
741 return;
|
|
742 }
|
|
743
|
358
|
744 q = ngx_queue_last(&cache->expire_queue);
|
|
745
|
|
746 file = ngx_queue_data(q, ngx_cached_open_file_t, queue);
|
|
747
|
332
|
748 if (n++ != 0 && now - file->accessed <= cache->inactive) {
|
|
749 return;
|
|
750 }
|
|
751
|
358
|
752 ngx_queue_remove(q);
|
332
|
753
|
|
754 ngx_rbtree_delete(&cache->rbtree, &file->node);
|
|
755
|
|
756 cache->current--;
|
|
757
|
|
758 ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0,
|
|
759 "expire cached open file: %s", file->name);
|
|
760
|
|
761 if (!file->err && !file->is_dir) {
|
|
762 file->close = 1;
|
358
|
763 ngx_close_cached_file(cache, file, 0, log);
|
332
|
764
|
|
765 } else {
|
|
766 ngx_free(file->name);
|
|
767 ngx_free(file);
|
|
768 }
|
|
769 }
|
|
770 }
|
|
771
|
|
772
|
|
773 static void
|
|
774 ngx_open_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp,
|
|
775 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel)
|
|
776 {
|
|
777 ngx_rbtree_node_t **p;
|
|
778 ngx_cached_open_file_t *file, *file_temp;
|
|
779
|
|
780 for ( ;; ) {
|
|
781
|
|
782 if (node->key < temp->key) {
|
|
783
|
|
784 p = &temp->left;
|
|
785
|
|
786 } else if (node->key > temp->key) {
|
|
787
|
|
788 p = &temp->right;
|
|
789
|
|
790 } else { /* node->key == temp->key */
|
|
791
|
|
792 file = (ngx_cached_open_file_t *) node;
|
|
793 file_temp = (ngx_cached_open_file_t *) temp;
|
|
794
|
|
795 p = (ngx_strcmp(file->name, file_temp->name) < 0)
|
|
796 ? &temp->left : &temp->right;
|
|
797 }
|
|
798
|
|
799 if (*p == sentinel) {
|
|
800 break;
|
|
801 }
|
|
802
|
|
803 temp = *p;
|
|
804 }
|
|
805
|
|
806 *p = node;
|
|
807 node->parent = temp;
|
|
808 node->left = sentinel;
|
|
809 node->right = sentinel;
|
|
810 ngx_rbt_red(node);
|
|
811 }
|
|
812
|
|
813
|
358
|
814 static ngx_cached_open_file_t *
|
|
815 ngx_open_file_lookup(ngx_open_file_cache_t *cache, ngx_str_t *name,
|
|
816 uint32_t hash)
|
|
817 {
|
|
818 ngx_int_t rc;
|
|
819 ngx_rbtree_node_t *node, *sentinel;
|
|
820 ngx_cached_open_file_t *file;
|
|
821
|
|
822 node = cache->rbtree.root;
|
|
823 sentinel = cache->rbtree.sentinel;
|
|
824
|
|
825 while (node != sentinel) {
|
|
826
|
|
827 if (hash < node->key) {
|
|
828 node = node->left;
|
|
829 continue;
|
|
830 }
|
|
831
|
|
832 if (hash > node->key) {
|
|
833 node = node->right;
|
|
834 continue;
|
|
835 }
|
|
836
|
|
837 /* hash == node->key */
|
|
838
|
|
839 do {
|
|
840 file = (ngx_cached_open_file_t *) node;
|
|
841
|
|
842 rc = ngx_strcmp(name->data, file->name);
|
|
843
|
|
844 if (rc == 0) {
|
|
845 return file;
|
|
846 }
|
|
847
|
|
848 node = (rc < 0) ? node->left : node->right;
|
|
849
|
|
850 } while (node != sentinel && hash == node->key);
|
|
851
|
|
852 break;
|
|
853 }
|
|
854
|
|
855 return NULL;
|
|
856 }
|
|
857
|
|
858
|
332
|
859 static void
|
|
860 ngx_open_file_cache_remove(ngx_event_t *ev)
|
|
861 {
|
|
862 ngx_cached_open_file_t *file;
|
|
863 ngx_open_file_cache_event_t *fev;
|
|
864
|
|
865 fev = ev->data;
|
|
866 file = fev->file;
|
|
867
|
358
|
868 ngx_queue_remove(&file->queue);
|
332
|
869
|
|
870 ngx_rbtree_delete(&fev->cache->rbtree, &file->node);
|
|
871
|
|
872 fev->cache->current--;
|
|
873
|
|
874 /* NGX_ONESHOT_EVENT was already deleted */
|
|
875 file->event = NULL;
|
384
|
876 file->use_event = 0;
|
332
|
877
|
|
878 file->close = 1;
|
|
879
|
358
|
880 ngx_close_cached_file(fev->cache, file, 0, ev->log);
|
332
|
881
|
|
882 /* free memory only when fev->cache and fev->file are already not needed */
|
|
883
|
|
884 ngx_free(ev->data);
|
|
885 ngx_free(ev);
|
|
886 }
|