Mercurial > hg > nginx
annotate src/core/ngx_open_file_cache.c @ 2069:23930ccd2642
use ngx_file_info() and test uniq if file is already open
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Thu, 26 Jun 2008 16:10:13 +0000 |
parents | 67a29af877ed |
children | 92402cc8b3cf |
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 | |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
138 of->fd = NGX_INVALID_FILE; |
1453 | 139 of->err = 0; |
140 | |
141 if (cache == NULL) { | |
142 | |
143 cln = ngx_pool_cleanup_add(pool, sizeof(ngx_pool_cleanup_file_t)); | |
144 if (cln == NULL) { | |
145 return NGX_ERROR; | |
146 } | |
147 | |
148 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
149 | |
150 if (rc == NGX_OK && !of->is_dir) { | |
151 cln->handler = ngx_pool_cleanup_file; | |
152 clnf = cln->data; | |
153 | |
154 clnf->fd = of->fd; | |
155 clnf->name = name->data; | |
156 clnf->log = pool->log; | |
157 } | |
158 | |
159 return rc; | |
160 } | |
161 | |
162 cln = ngx_pool_cleanup_add(pool, sizeof(ngx_open_file_cache_cleanup_t)); | |
163 if (cln == NULL) { | |
164 return NGX_ERROR; | |
165 } | |
166 | |
167 now = ngx_time(); | |
168 | |
1775 | 169 hash = ngx_crc32_long(name->data, name->len); |
170 | |
171 file = ngx_open_file_lookup(cache, name, hash); | |
172 | |
173 if (file) { | |
174 | |
175 file->uses++; | |
176 | |
1987 | 177 ngx_queue_remove(&file->queue); |
178 | |
1775 | 179 if (file->fd == NGX_INVALID_FILE && file->err == 0 && !file->is_dir) { |
180 | |
181 /* file was not used often enough to keep open */ | |
182 | |
183 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
1453 | 184 |
1775 | 185 if (rc != NGX_OK && (of->err == 0 || !of->errors)) { |
186 goto failed; | |
187 } | |
188 | |
189 goto add_event; | |
1453 | 190 } |
191 | |
1775 | 192 if ((file->event && file->use_event) |
2063
67a29af877ed
initialize of.uniq in ngx_open_cached_file()
Igor Sysoev <igor@sysoev.ru>
parents:
2006
diff
changeset
|
193 || (file->event == NULL |
67a29af877ed
initialize of.uniq in ngx_open_cached_file()
Igor Sysoev <igor@sysoev.ru>
parents:
2006
diff
changeset
|
194 && (of->uniq == 0 || of->uniq == file->uniq) |
67a29af877ed
initialize of.uniq in ngx_open_cached_file()
Igor Sysoev <igor@sysoev.ru>
parents:
2006
diff
changeset
|
195 && now - file->created < of->valid)) |
1775 | 196 { |
197 if (file->err == 0) { | |
1772 | 198 |
1775 | 199 of->fd = file->fd; |
200 of->uniq = file->uniq; | |
201 of->mtime = file->mtime; | |
202 of->size = file->size; | |
1453 | 203 |
1775 | 204 of->is_dir = file->is_dir; |
205 of->is_file = file->is_file; | |
206 of->is_link = file->is_link; | |
207 of->is_exec = file->is_exec; | |
1453 | 208 |
1775 | 209 if (!file->is_dir) { |
210 file->count++; | |
211 ngx_open_file_add_event(cache, file, of, pool->log); | |
1453 | 212 } |
213 | |
1775 | 214 } else { |
215 of->err = file->err; | |
216 } | |
217 | |
218 goto found; | |
219 } | |
220 | |
221 ngx_log_debug4(NGX_LOG_DEBUG_CORE, pool->log, 0, | |
222 "retest open file: %s, fd:%d, c:%d, e:%d", | |
223 file->name, file->fd, file->count, file->err); | |
1453 | 224 |
1775 | 225 if (file->is_dir) { |
226 | |
227 /* | |
228 * chances that directory became file are very small | |
229 * so test_dir flag allows to use a single syscall | |
230 * in ngx_file_info() instead of three syscalls | |
231 */ | |
232 | |
233 of->test_dir = 1; | |
234 } | |
235 | |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
236 of->fd = file->fd; |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
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237 of->uniq = file->uniq; |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
238 |
1775 | 239 rc = ngx_open_and_stat_file(name->data, of, pool->log); |
1453 | 240 |
1775 | 241 if (rc != NGX_OK && (of->err == 0 || !of->errors)) { |
242 goto failed; | |
243 } | |
244 | |
245 if (of->is_dir) { | |
246 | |
247 if (file->is_dir || file->err) { | |
248 goto update; | |
249 } | |
250 | |
251 /* file became directory */ | |
1453 | 252 |
1775 | 253 } else if (of->err == 0) { /* file */ |
254 | |
255 if (file->is_dir || file->err) { | |
256 goto add_event; | |
257 } | |
1453 | 258 |
1775 | 259 if (of->uniq == file->uniq |
260 && of->mtime == file->mtime | |
261 && of->size == file->size) | |
262 { | |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
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263 if (of->fd != file->fd) { |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
264 if (ngx_close_file(of->fd) == NGX_FILE_ERROR) { |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
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parents:
2063
diff
changeset
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265 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
266 ngx_close_file_n " \"%s\" failed", |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
267 name->data); |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
268 } |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
269 |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
270 of->fd = file->fd; |
1453 | 271 } |
272 | |
1775 | 273 file->count++; |
1453 | 274 |
1775 | 275 if (file->event) { |
276 file->use_event = 1; | |
277 goto renew; | |
1453 | 278 } |
279 | |
1775 | 280 ngx_open_file_add_event(cache, file, of, pool->log); |
281 | |
282 goto renew; | |
283 } | |
1453 | 284 |
1775 | 285 /* file was changed */ |
1453 | 286 |
1775 | 287 } else { /* error to cache */ |
1453 | 288 |
1775 | 289 if (file->err || file->is_dir) { |
290 goto update; | |
1453 | 291 } |
292 | |
1775 | 293 /* file was removed, etc. */ |
294 } | |
295 | |
296 if (file->count == 0) { | |
297 | |
298 ngx_open_file_del_event(file); | |
1453 | 299 |
1775 | 300 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { |
301 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, | |
302 ngx_close_file_n " \"%s\" failed", | |
303 name->data); | |
304 } | |
1453 | 305 |
1775 | 306 goto add_event; |
307 } | |
308 | |
309 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
310 | |
311 cache->current--; | |
312 | |
313 file->close = 1; | |
314 | |
315 goto create; | |
1453 | 316 } |
317 | |
318 /* not found */ | |
319 | |
320 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
321 | |
322 if (rc != NGX_OK && (of->err == 0 || !of->errors)) { | |
323 goto failed; | |
324 } | |
325 | |
326 create: | |
327 | |
328 if (cache->current >= cache->max) { | |
329 ngx_expire_old_cached_files(cache, 0, pool->log); | |
330 } | |
331 | |
332 file = ngx_alloc(sizeof(ngx_cached_open_file_t), pool->log); | |
333 | |
334 if (file == NULL) { | |
335 goto failed; | |
336 } | |
337 | |
338 file->name = ngx_alloc(name->len + 1, pool->log); | |
339 | |
340 if (file->name == NULL) { | |
341 ngx_free(file); | |
342 file = NULL; | |
343 goto failed; | |
344 } | |
345 | |
346 ngx_cpystrn(file->name, name->data, name->len + 1); | |
347 | |
348 file->node.key = hash; | |
349 | |
350 ngx_rbtree_insert(&cache->rbtree, &file->node); | |
351 | |
352 cache->current++; | |
353 | |
1775 | 354 file->uses = 1; |
1453 | 355 file->count = 0; |
1775 | 356 file->use_event = 0; |
357 file->event = NULL; | |
358 | |
359 add_event: | |
360 | |
361 ngx_open_file_add_event(cache, file, of, pool->log); | |
1453 | 362 |
363 update: | |
364 | |
365 file->fd = of->fd; | |
366 file->err = of->err; | |
367 | |
368 if (of->err == 0) { | |
369 file->uniq = of->uniq; | |
370 file->mtime = of->mtime; | |
371 file->size = of->size; | |
372 | |
373 file->close = 0; | |
374 | |
375 file->is_dir = of->is_dir; | |
376 file->is_file = of->is_file; | |
377 file->is_link = of->is_link; | |
378 file->is_exec = of->is_exec; | |
379 | |
380 if (!of->is_dir) { | |
381 file->count++; | |
382 } | |
383 } | |
384 | |
385 renew: | |
386 | |
387 file->created = now; | |
388 | |
389 found: | |
390 | |
391 file->accessed = now; | |
392 | |
1765 | 393 ngx_queue_insert_head(&cache->expire_queue, &file->queue); |
1453 | 394 |
1772 | 395 ngx_log_debug5(NGX_LOG_DEBUG_CORE, pool->log, 0, |
396 "cached open file: %s, fd:%d, c:%d, e:%d, u:%d", | |
397 file->name, file->fd, file->count, file->err, file->uses); | |
1453 | 398 |
399 if (of->err == 0) { | |
400 | |
401 if (!of->is_dir) { | |
402 cln->handler = ngx_open_file_cleanup; | |
403 ofcln = cln->data; | |
404 | |
405 ofcln->cache = cache; | |
406 ofcln->file = file; | |
1772 | 407 ofcln->min_uses = of->min_uses; |
1453 | 408 ofcln->log = pool->log; |
409 } | |
410 | |
411 return NGX_OK; | |
412 } | |
413 | |
414 return NGX_ERROR; | |
415 | |
416 failed: | |
417 | |
1988
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
418 if (file) { |
1453 | 419 ngx_rbtree_delete(&cache->rbtree, &file->node); |
420 | |
421 cache->current--; | |
422 | |
1988
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
423 if (file->count == 0) { |
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
424 |
2006
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
425 if (file->fd != NGX_INVALID_FILE) { |
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
426 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { |
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
427 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, |
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
428 ngx_close_file_n " \"%s\" failed", |
1988
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
429 file->name); |
2006
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
430 } |
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
431 } |
1988
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
432 |
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
433 ngx_free(file->name); |
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
434 ngx_free(file); |
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
435 |
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
436 } else { |
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
437 file->close = 1; |
1453 | 438 } |
439 } | |
440 | |
441 if (of->fd != NGX_INVALID_FILE) { | |
442 if (ngx_close_file(of->fd) == NGX_FILE_ERROR) { | |
443 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, | |
444 ngx_close_file_n " \"%s\" failed", name->data); | |
445 } | |
446 } | |
447 | |
448 return NGX_ERROR; | |
449 } | |
450 | |
451 | |
452 static ngx_int_t | |
453 ngx_open_and_stat_file(u_char *name, ngx_open_file_info_t *of, ngx_log_t *log) | |
454 { | |
455 ngx_fd_t fd; | |
456 ngx_file_info_t fi; | |
457 | |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
458 if (of->fd != NGX_INVALID_FILE || of->test_dir) { |
1453 | 459 |
460 if (ngx_file_info(name, &fi) == -1) { | |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
461 goto failed; |
1453 | 462 } |
463 | |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
464 if (of->fd != NGX_INVALID_FILE && of->uniq == ngx_file_uniq(&fi)) { |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
465 goto done; |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
466 } |
1453 | 467 |
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468 if (of->test_dir && of->is_dir) { |
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469 goto done; |
1453 | 470 } |
471 } | |
472 | |
473 fd = ngx_open_file(name, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0); | |
474 | |
475 if (fd == NGX_INVALID_FILE) { | |
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476 goto failed; |
1453 | 477 } |
478 | |
479 if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) { | |
480 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno, | |
481 ngx_fd_info_n " \"%s\" failed", name); | |
482 | |
483 if (ngx_close_file(fd) == NGX_FILE_ERROR) { | |
484 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
485 ngx_close_file_n " \"%s\" failed", name); | |
486 } | |
487 | |
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488 of->fd = NGX_INVALID_FILE; |
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489 |
1453 | 490 return NGX_ERROR; |
491 } | |
492 | |
493 if (ngx_is_dir(&fi)) { | |
494 if (ngx_close_file(fd) == NGX_FILE_ERROR) { | |
495 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
496 ngx_close_file_n " \"%s\" failed", name); | |
497 } | |
498 | |
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499 of->fd = NGX_INVALID_FILE; |
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500 |
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501 } else { |
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502 of->fd = fd; |
1453 | 503 } |
504 | |
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505 done: |
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506 |
1453 | 507 of->uniq = ngx_file_uniq(&fi); |
508 of->mtime = ngx_file_mtime(&fi); | |
509 of->size = ngx_file_size(&fi); | |
510 of->is_dir = ngx_is_dir(&fi); | |
511 of->is_file = ngx_is_file(&fi); | |
512 of->is_link = ngx_is_link(&fi); | |
513 of->is_exec = ngx_is_exec(&fi); | |
514 | |
515 return NGX_OK; | |
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516 |
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517 failed: |
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518 |
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519 of->fd = NGX_INVALID_FILE; |
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520 of->err = ngx_errno; |
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521 |
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522 return NGX_ERROR; |
1453 | 523 } |
524 | |
525 | |
1775 | 526 /* |
527 * we ignore any possible event setting error and | |
528 * fallback to usual periodic file retests | |
529 */ | |
530 | |
531 static void | |
532 ngx_open_file_add_event(ngx_open_file_cache_t *cache, | |
533 ngx_cached_open_file_t *file, ngx_open_file_info_t *of, ngx_log_t *log) | |
534 { | |
535 ngx_open_file_cache_event_t *fev; | |
536 | |
537 if (!(ngx_event_flags & NGX_USE_VNODE_EVENT) | |
538 || !of->events | |
539 || file->event | |
540 || of->fd == NGX_INVALID_FILE | |
541 || file->uses < of->min_uses) | |
542 { | |
543 return; | |
544 } | |
545 | |
546 file->event = ngx_calloc(sizeof(ngx_event_t), log); | |
547 if (file->event== NULL) { | |
548 return; | |
549 } | |
550 | |
551 fev = ngx_alloc(sizeof(ngx_open_file_cache_event_t), log); | |
552 if (fev == NULL) { | |
553 ngx_free(file->event); | |
554 file->event = NULL; | |
555 return; | |
556 } | |
557 | |
558 fev->fd = of->fd; | |
559 fev->file = file; | |
560 fev->cache = cache; | |
561 | |
562 file->event->handler = ngx_open_file_cache_remove; | |
563 file->event->data = fev; | |
564 | |
565 /* | |
566 * although vnode event may be called while ngx_cycle->poll | |
567 * destruction, however, cleanup procedures are run before any | |
568 * memory freeing and events will be canceled. | |
569 */ | |
570 | |
571 file->event->log = ngx_cycle->log; | |
572 | |
573 if (ngx_add_event(file->event, NGX_VNODE_EVENT, NGX_ONESHOT_EVENT) | |
574 != NGX_OK) | |
575 { | |
576 ngx_free(file->event->data); | |
577 ngx_free(file->event); | |
578 file->event = NULL; | |
579 return; | |
580 } | |
581 | |
582 /* | |
583 * we do not file->use_event here because there may be a race | |
584 * condition between opening file and adding event, so we rely | |
585 * upon event notification only after first file revalidation | |
586 */ | |
587 | |
588 return; | |
589 } | |
590 | |
591 | |
1453 | 592 static void |
593 ngx_open_file_cleanup(void *data) | |
594 { | |
595 ngx_open_file_cache_cleanup_t *c = data; | |
596 | |
597 c->file->count--; | |
598 | |
1772 | 599 ngx_close_cached_file(c->cache, c->file, c->min_uses, c->log); |
1453 | 600 |
601 /* drop one or two expired open files */ | |
602 ngx_expire_old_cached_files(c->cache, 1, c->log); | |
603 } | |
604 | |
605 | |
606 static void | |
607 ngx_close_cached_file(ngx_open_file_cache_t *cache, | |
1772 | 608 ngx_cached_open_file_t *file, ngx_uint_t min_uses, ngx_log_t *log) |
1453 | 609 { |
1772 | 610 ngx_log_debug5(NGX_LOG_DEBUG_CORE, log, 0, |
611 "close cached open file: %s, fd:%d, c:%d, u:%d, %d", | |
612 file->name, file->fd, file->count, file->uses, file->close); | |
1453 | 613 |
614 if (!file->close) { | |
615 | |
616 file->accessed = ngx_time(); | |
617 | |
1765 | 618 ngx_queue_remove(&file->queue); |
1453 | 619 |
1765 | 620 ngx_queue_insert_head(&cache->expire_queue, &file->queue); |
1453 | 621 |
1772 | 622 if (file->uses >= min_uses || file->count) { |
623 return; | |
624 } | |
1453 | 625 } |
626 | |
1775 | 627 ngx_open_file_del_event(file); |
1453 | 628 |
629 if (file->count) { | |
630 return; | |
631 } | |
632 | |
1772 | 633 if (file->fd != NGX_INVALID_FILE) { |
634 | |
635 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { | |
636 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
637 ngx_close_file_n " \"%s\" failed", file->name); | |
638 } | |
639 | |
640 file->fd = NGX_INVALID_FILE; | |
641 } | |
642 | |
643 if (!file->close) { | |
644 return; | |
1453 | 645 } |
646 | |
647 ngx_free(file->name); | |
648 ngx_free(file); | |
649 } | |
650 | |
651 | |
652 static void | |
1775 | 653 ngx_open_file_del_event(ngx_cached_open_file_t *file) |
654 { | |
655 if (file->event == NULL) { | |
656 return; | |
657 } | |
658 | |
659 (void) ngx_del_event(file->event, NGX_VNODE_EVENT, | |
660 file->count ? NGX_FLUSH_EVENT : NGX_CLOSE_EVENT); | |
661 | |
662 ngx_free(file->event->data); | |
663 ngx_free(file->event); | |
664 file->event = NULL; | |
665 file->use_event = 0; | |
666 } | |
667 | |
668 | |
669 static void | |
1453 | 670 ngx_expire_old_cached_files(ngx_open_file_cache_t *cache, ngx_uint_t n, |
671 ngx_log_t *log) | |
672 { | |
673 time_t now; | |
1765 | 674 ngx_queue_t *q; |
1453 | 675 ngx_cached_open_file_t *file; |
676 | |
677 now = ngx_time(); | |
678 | |
679 /* | |
680 * n == 1 deletes one or two inactive files | |
681 * n == 0 deletes least recently used file by force | |
682 * and one or two inactive files | |
683 */ | |
684 | |
685 while (n < 3) { | |
686 | |
1765 | 687 if (ngx_queue_empty(&cache->expire_queue)) { |
1453 | 688 return; |
689 } | |
690 | |
1765 | 691 q = ngx_queue_last(&cache->expire_queue); |
692 | |
693 file = ngx_queue_data(q, ngx_cached_open_file_t, queue); | |
694 | |
1453 | 695 if (n++ != 0 && now - file->accessed <= cache->inactive) { |
696 return; | |
697 } | |
698 | |
1765 | 699 ngx_queue_remove(q); |
1453 | 700 |
701 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
702 | |
703 cache->current--; | |
704 | |
705 ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, | |
706 "expire cached open file: %s", file->name); | |
707 | |
708 if (!file->err && !file->is_dir) { | |
709 file->close = 1; | |
1772 | 710 ngx_close_cached_file(cache, file, 0, log); |
1453 | 711 |
712 } else { | |
713 ngx_free(file->name); | |
714 ngx_free(file); | |
715 } | |
716 } | |
717 } | |
718 | |
719 | |
720 static void | |
721 ngx_open_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
722 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) | |
723 { | |
724 ngx_rbtree_node_t **p; | |
725 ngx_cached_open_file_t *file, *file_temp; | |
726 | |
727 for ( ;; ) { | |
728 | |
729 if (node->key < temp->key) { | |
730 | |
731 p = &temp->left; | |
732 | |
733 } else if (node->key > temp->key) { | |
734 | |
735 p = &temp->right; | |
736 | |
737 } else { /* node->key == temp->key */ | |
738 | |
739 file = (ngx_cached_open_file_t *) node; | |
740 file_temp = (ngx_cached_open_file_t *) temp; | |
741 | |
742 p = (ngx_strcmp(file->name, file_temp->name) < 0) | |
743 ? &temp->left : &temp->right; | |
744 } | |
745 | |
746 if (*p == sentinel) { | |
747 break; | |
748 } | |
749 | |
750 temp = *p; | |
751 } | |
752 | |
753 *p = node; | |
754 node->parent = temp; | |
755 node->left = sentinel; | |
756 node->right = sentinel; | |
757 ngx_rbt_red(node); | |
758 } | |
759 | |
760 | |
1775 | 761 static ngx_cached_open_file_t * |
762 ngx_open_file_lookup(ngx_open_file_cache_t *cache, ngx_str_t *name, | |
763 uint32_t hash) | |
764 { | |
765 ngx_int_t rc; | |
766 ngx_rbtree_node_t *node, *sentinel; | |
767 ngx_cached_open_file_t *file; | |
768 | |
769 node = cache->rbtree.root; | |
770 sentinel = cache->rbtree.sentinel; | |
771 | |
772 while (node != sentinel) { | |
773 | |
774 if (hash < node->key) { | |
775 node = node->left; | |
776 continue; | |
777 } | |
778 | |
779 if (hash > node->key) { | |
780 node = node->right; | |
781 continue; | |
782 } | |
783 | |
784 /* hash == node->key */ | |
785 | |
786 do { | |
787 file = (ngx_cached_open_file_t *) node; | |
788 | |
789 rc = ngx_strcmp(name->data, file->name); | |
790 | |
791 if (rc == 0) { | |
792 return file; | |
793 } | |
794 | |
795 node = (rc < 0) ? node->left : node->right; | |
796 | |
797 } while (node != sentinel && hash == node->key); | |
798 | |
799 break; | |
800 } | |
801 | |
802 return NULL; | |
803 } | |
804 | |
805 | |
1453 | 806 static void |
807 ngx_open_file_cache_remove(ngx_event_t *ev) | |
808 { | |
809 ngx_cached_open_file_t *file; | |
810 ngx_open_file_cache_event_t *fev; | |
811 | |
812 fev = ev->data; | |
813 file = fev->file; | |
814 | |
1765 | 815 ngx_queue_remove(&file->queue); |
1453 | 816 |
817 ngx_rbtree_delete(&fev->cache->rbtree, &file->node); | |
818 | |
819 fev->cache->current--; | |
820 | |
821 /* NGX_ONESHOT_EVENT was already deleted */ | |
822 file->event = NULL; | |
823 | |
824 file->close = 1; | |
825 | |
1772 | 826 ngx_close_cached_file(fev->cache, file, 0, ev->log); |
1453 | 827 |
828 /* free memory only when fev->cache and fev->file are already not needed */ | |
829 | |
830 ngx_free(ev->data); | |
831 ngx_free(ev); | |
832 } |