Mercurial > hg > nginx
annotate src/core/ngx_open_file_cache.c @ 2246:987831d73bd8
cache directio flag in open file cache
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Fri, 12 Sep 2008 13:39:51 +0000 |
parents | 8564129d49b6 |
children | 225fa4abd76f |
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:
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diff
changeset
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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
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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 | |
2070 | 192 if (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
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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
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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; | |
2246
987831d73bd8
cache directio flag in open file cache
Igor Sysoev <igor@sysoev.ru>
parents:
2231
diff
changeset
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208 of->is_directio = file->is_directio; |
1453 | 209 |
1775 | 210 if (!file->is_dir) { |
211 file->count++; | |
212 ngx_open_file_add_event(cache, file, of, pool->log); | |
1453 | 213 } |
214 | |
1775 | 215 } else { |
216 of->err = file->err; | |
217 } | |
218 | |
219 goto found; | |
220 } | |
221 | |
222 ngx_log_debug4(NGX_LOG_DEBUG_CORE, pool->log, 0, | |
223 "retest open file: %s, fd:%d, c:%d, e:%d", | |
224 file->name, file->fd, file->count, file->err); | |
1453 | 225 |
1775 | 226 if (file->is_dir) { |
227 | |
228 /* | |
229 * chances that directory became file are very small | |
230 * so test_dir flag allows to use a single syscall | |
231 * in ngx_file_info() instead of three syscalls | |
232 */ | |
233 | |
234 of->test_dir = 1; | |
235 } | |
236 | |
2069
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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->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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238 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
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239 |
1775 | 240 rc = ngx_open_and_stat_file(name->data, of, pool->log); |
1453 | 241 |
1775 | 242 if (rc != NGX_OK && (of->err == 0 || !of->errors)) { |
243 goto failed; | |
244 } | |
245 | |
246 if (of->is_dir) { | |
247 | |
248 if (file->is_dir || file->err) { | |
249 goto update; | |
250 } | |
251 | |
252 /* file became directory */ | |
1453 | 253 |
1775 | 254 } else if (of->err == 0) { /* file */ |
255 | |
256 if (file->is_dir || file->err) { | |
257 goto add_event; | |
258 } | |
1453 | 259 |
2070 | 260 if (of->uniq == file->uniq) { |
1453 | 261 |
1775 | 262 file->count++; |
1453 | 263 |
1775 | 264 if (file->event) { |
265 file->use_event = 1; | |
1453 | 266 } |
267 | |
1775 | 268 goto renew; |
269 } | |
1453 | 270 |
1775 | 271 /* file was changed */ |
1453 | 272 |
1775 | 273 } else { /* error to cache */ |
1453 | 274 |
1775 | 275 if (file->err || file->is_dir) { |
276 goto update; | |
1453 | 277 } |
278 | |
1775 | 279 /* file was removed, etc. */ |
280 } | |
281 | |
282 if (file->count == 0) { | |
283 | |
284 ngx_open_file_del_event(file); | |
1453 | 285 |
1775 | 286 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { |
287 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, | |
288 ngx_close_file_n " \"%s\" failed", | |
289 name->data); | |
290 } | |
1453 | 291 |
1775 | 292 goto add_event; |
293 } | |
294 | |
295 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
296 | |
297 cache->current--; | |
298 | |
299 file->close = 1; | |
300 | |
301 goto create; | |
1453 | 302 } |
303 | |
304 /* not found */ | |
305 | |
306 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
307 | |
308 if (rc != NGX_OK && (of->err == 0 || !of->errors)) { | |
309 goto failed; | |
310 } | |
311 | |
312 create: | |
313 | |
314 if (cache->current >= cache->max) { | |
315 ngx_expire_old_cached_files(cache, 0, pool->log); | |
316 } | |
317 | |
318 file = ngx_alloc(sizeof(ngx_cached_open_file_t), pool->log); | |
319 | |
320 if (file == NULL) { | |
321 goto failed; | |
322 } | |
323 | |
324 file->name = ngx_alloc(name->len + 1, pool->log); | |
325 | |
326 if (file->name == NULL) { | |
327 ngx_free(file); | |
328 file = NULL; | |
329 goto failed; | |
330 } | |
331 | |
332 ngx_cpystrn(file->name, name->data, name->len + 1); | |
333 | |
334 file->node.key = hash; | |
335 | |
336 ngx_rbtree_insert(&cache->rbtree, &file->node); | |
337 | |
338 cache->current++; | |
339 | |
1775 | 340 file->uses = 1; |
1453 | 341 file->count = 0; |
1775 | 342 file->event = NULL; |
343 | |
344 add_event: | |
345 | |
346 ngx_open_file_add_event(cache, file, of, pool->log); | |
1453 | 347 |
348 update: | |
349 | |
350 file->fd = of->fd; | |
351 file->err = of->err; | |
352 | |
353 if (of->err == 0) { | |
354 file->uniq = of->uniq; | |
355 file->mtime = of->mtime; | |
356 file->size = of->size; | |
357 | |
358 file->close = 0; | |
359 | |
360 file->is_dir = of->is_dir; | |
361 file->is_file = of->is_file; | |
362 file->is_link = of->is_link; | |
363 file->is_exec = of->is_exec; | |
2246
987831d73bd8
cache directio flag in open file cache
Igor Sysoev <igor@sysoev.ru>
parents:
2231
diff
changeset
|
364 file->is_directio = of->is_directio; |
1453 | 365 |
366 if (!of->is_dir) { | |
367 file->count++; | |
368 } | |
369 } | |
370 | |
371 renew: | |
372 | |
373 file->created = now; | |
374 | |
375 found: | |
376 | |
377 file->accessed = now; | |
378 | |
1765 | 379 ngx_queue_insert_head(&cache->expire_queue, &file->queue); |
1453 | 380 |
1772 | 381 ngx_log_debug5(NGX_LOG_DEBUG_CORE, pool->log, 0, |
382 "cached open file: %s, fd:%d, c:%d, e:%d, u:%d", | |
383 file->name, file->fd, file->count, file->err, file->uses); | |
1453 | 384 |
385 if (of->err == 0) { | |
386 | |
387 if (!of->is_dir) { | |
388 cln->handler = ngx_open_file_cleanup; | |
389 ofcln = cln->data; | |
390 | |
391 ofcln->cache = cache; | |
392 ofcln->file = file; | |
1772 | 393 ofcln->min_uses = of->min_uses; |
1453 | 394 ofcln->log = pool->log; |
395 } | |
396 | |
397 return NGX_OK; | |
398 } | |
399 | |
400 return NGX_ERROR; | |
401 | |
402 failed: | |
403 | |
1988
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
404 if (file) { |
1453 | 405 ngx_rbtree_delete(&cache->rbtree, &file->node); |
406 | |
407 cache->current--; | |
408 | |
1988
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
409 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
|
410 |
2006
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
411 if (file->fd != NGX_INVALID_FILE) { |
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
412 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
|
413 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
|
414 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
|
415 file->name); |
2006
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
416 } |
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
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 |
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
419 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
|
420 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
|
421 |
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
422 } else { |
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
423 file->close = 1; |
1453 | 424 } |
425 } | |
426 | |
427 if (of->fd != NGX_INVALID_FILE) { | |
428 if (ngx_close_file(of->fd) == NGX_FILE_ERROR) { | |
429 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, | |
430 ngx_close_file_n " \"%s\" failed", name->data); | |
431 } | |
432 } | |
433 | |
434 return NGX_ERROR; | |
435 } | |
436 | |
437 | |
438 static ngx_int_t | |
439 ngx_open_and_stat_file(u_char *name, ngx_open_file_info_t *of, ngx_log_t *log) | |
440 { | |
441 ngx_fd_t fd; | |
442 ngx_file_info_t fi; | |
443 | |
2070 | 444 if (of->fd != NGX_INVALID_FILE) { |
1453 | 445 |
446 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
|
447 goto failed; |
1453 | 448 } |
449 | |
2070 | 450 if (of->uniq == ngx_file_uniq(&fi)) { |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
451 goto done; |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
452 } |
1453 | 453 |
2070 | 454 } else if (of->test_dir) { |
455 | |
456 if (ngx_file_info(name, &fi) == -1) { | |
457 goto failed; | |
458 } | |
459 | |
460 if (of->is_dir) { | |
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 done; |
1453 | 462 } |
463 } | |
464 | |
2072 | 465 if (!of->log) { |
466 fd = ngx_open_file(name, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0); | |
467 | |
468 } else { | |
469 fd = ngx_open_file(name, NGX_FILE_RDWR, | |
470 NGX_FILE_CREATE_OR_OPEN|NGX_FILE_APPEND, | |
471 NGX_FILE_DEFAULT_ACCESS); | |
472 } | |
1453 | 473 |
474 if (fd == NGX_INVALID_FILE) { | |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
475 goto failed; |
1453 | 476 } |
477 | |
478 if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) { | |
479 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno, | |
480 ngx_fd_info_n " \"%s\" failed", name); | |
481 | |
482 if (ngx_close_file(fd) == NGX_FILE_ERROR) { | |
483 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
484 ngx_close_file_n " \"%s\" failed", name); | |
485 } | |
486 | |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
487 of->fd = NGX_INVALID_FILE; |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
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488 |
1453 | 489 return NGX_ERROR; |
490 } | |
491 | |
492 if (ngx_is_dir(&fi)) { | |
493 if (ngx_close_file(fd) == NGX_FILE_ERROR) { | |
494 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
495 ngx_close_file_n " \"%s\" failed", name); | |
496 } | |
497 | |
2069
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498 of->fd = NGX_INVALID_FILE; |
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499 |
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500 } else { |
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501 of->fd = fd; |
2129 | 502 |
503 if (of->directio <= ngx_file_size(&fi)) { | |
2246
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504 if (ngx_directio_on(fd) == -1) { |
2129 | 505 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, |
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506 ngx_directio_on_n " \"%s\" failed", name); |
2231
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507 |
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508 } else { |
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509 of->is_directio = 1; |
2129 | 510 } |
511 } | |
1453 | 512 } |
513 | |
2069
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514 done: |
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515 |
1453 | 516 of->uniq = ngx_file_uniq(&fi); |
517 of->mtime = ngx_file_mtime(&fi); | |
518 of->size = ngx_file_size(&fi); | |
519 of->is_dir = ngx_is_dir(&fi); | |
520 of->is_file = ngx_is_file(&fi); | |
521 of->is_link = ngx_is_link(&fi); | |
522 of->is_exec = ngx_is_exec(&fi); | |
523 | |
524 return NGX_OK; | |
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525 |
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526 failed: |
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527 |
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528 of->fd = NGX_INVALID_FILE; |
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529 of->err = ngx_errno; |
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530 |
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531 return NGX_ERROR; |
1453 | 532 } |
533 | |
534 | |
1775 | 535 /* |
536 * we ignore any possible event setting error and | |
537 * fallback to usual periodic file retests | |
538 */ | |
539 | |
540 static void | |
541 ngx_open_file_add_event(ngx_open_file_cache_t *cache, | |
542 ngx_cached_open_file_t *file, ngx_open_file_info_t *of, ngx_log_t *log) | |
543 { | |
544 ngx_open_file_cache_event_t *fev; | |
545 | |
546 if (!(ngx_event_flags & NGX_USE_VNODE_EVENT) | |
547 || !of->events | |
548 || file->event | |
549 || of->fd == NGX_INVALID_FILE | |
550 || file->uses < of->min_uses) | |
551 { | |
552 return; | |
553 } | |
554 | |
2070 | 555 file->use_event = 0; |
556 | |
1775 | 557 file->event = ngx_calloc(sizeof(ngx_event_t), log); |
558 if (file->event== NULL) { | |
559 return; | |
560 } | |
561 | |
562 fev = ngx_alloc(sizeof(ngx_open_file_cache_event_t), log); | |
563 if (fev == NULL) { | |
564 ngx_free(file->event); | |
565 file->event = NULL; | |
566 return; | |
567 } | |
568 | |
569 fev->fd = of->fd; | |
570 fev->file = file; | |
571 fev->cache = cache; | |
572 | |
573 file->event->handler = ngx_open_file_cache_remove; | |
574 file->event->data = fev; | |
575 | |
576 /* | |
577 * although vnode event may be called while ngx_cycle->poll | |
578 * destruction, however, cleanup procedures are run before any | |
579 * memory freeing and events will be canceled. | |
580 */ | |
581 | |
582 file->event->log = ngx_cycle->log; | |
583 | |
584 if (ngx_add_event(file->event, NGX_VNODE_EVENT, NGX_ONESHOT_EVENT) | |
585 != NGX_OK) | |
586 { | |
587 ngx_free(file->event->data); | |
588 ngx_free(file->event); | |
589 file->event = NULL; | |
590 return; | |
591 } | |
592 | |
593 /* | |
2071 | 594 * we do not set file->use_event here because there may be a race |
595 * condition: a file may be deleted between opening the file and | |
596 * adding event, so we rely upon event notification only after | |
597 * one file revalidation on next file access | |
1775 | 598 */ |
599 | |
600 return; | |
601 } | |
602 | |
603 | |
1453 | 604 static void |
605 ngx_open_file_cleanup(void *data) | |
606 { | |
607 ngx_open_file_cache_cleanup_t *c = data; | |
608 | |
609 c->file->count--; | |
610 | |
1772 | 611 ngx_close_cached_file(c->cache, c->file, c->min_uses, c->log); |
1453 | 612 |
613 /* drop one or two expired open files */ | |
614 ngx_expire_old_cached_files(c->cache, 1, c->log); | |
615 } | |
616 | |
617 | |
618 static void | |
619 ngx_close_cached_file(ngx_open_file_cache_t *cache, | |
1772 | 620 ngx_cached_open_file_t *file, ngx_uint_t min_uses, ngx_log_t *log) |
1453 | 621 { |
1772 | 622 ngx_log_debug5(NGX_LOG_DEBUG_CORE, log, 0, |
623 "close cached open file: %s, fd:%d, c:%d, u:%d, %d", | |
624 file->name, file->fd, file->count, file->uses, file->close); | |
1453 | 625 |
626 if (!file->close) { | |
627 | |
628 file->accessed = ngx_time(); | |
629 | |
1765 | 630 ngx_queue_remove(&file->queue); |
1453 | 631 |
1765 | 632 ngx_queue_insert_head(&cache->expire_queue, &file->queue); |
1453 | 633 |
1772 | 634 if (file->uses >= min_uses || file->count) { |
635 return; | |
636 } | |
1453 | 637 } |
638 | |
1775 | 639 ngx_open_file_del_event(file); |
1453 | 640 |
641 if (file->count) { | |
642 return; | |
643 } | |
644 | |
1772 | 645 if (file->fd != NGX_INVALID_FILE) { |
646 | |
647 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { | |
648 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
649 ngx_close_file_n " \"%s\" failed", file->name); | |
650 } | |
651 | |
652 file->fd = NGX_INVALID_FILE; | |
653 } | |
654 | |
655 if (!file->close) { | |
656 return; | |
1453 | 657 } |
658 | |
659 ngx_free(file->name); | |
660 ngx_free(file); | |
661 } | |
662 | |
663 | |
664 static void | |
1775 | 665 ngx_open_file_del_event(ngx_cached_open_file_t *file) |
666 { | |
667 if (file->event == NULL) { | |
668 return; | |
669 } | |
670 | |
671 (void) ngx_del_event(file->event, NGX_VNODE_EVENT, | |
672 file->count ? NGX_FLUSH_EVENT : NGX_CLOSE_EVENT); | |
673 | |
674 ngx_free(file->event->data); | |
675 ngx_free(file->event); | |
676 file->event = NULL; | |
677 file->use_event = 0; | |
678 } | |
679 | |
680 | |
681 static void | |
1453 | 682 ngx_expire_old_cached_files(ngx_open_file_cache_t *cache, ngx_uint_t n, |
683 ngx_log_t *log) | |
684 { | |
685 time_t now; | |
1765 | 686 ngx_queue_t *q; |
1453 | 687 ngx_cached_open_file_t *file; |
688 | |
689 now = ngx_time(); | |
690 | |
691 /* | |
692 * n == 1 deletes one or two inactive files | |
693 * n == 0 deletes least recently used file by force | |
694 * and one or two inactive files | |
695 */ | |
696 | |
697 while (n < 3) { | |
698 | |
1765 | 699 if (ngx_queue_empty(&cache->expire_queue)) { |
1453 | 700 return; |
701 } | |
702 | |
1765 | 703 q = ngx_queue_last(&cache->expire_queue); |
704 | |
705 file = ngx_queue_data(q, ngx_cached_open_file_t, queue); | |
706 | |
1453 | 707 if (n++ != 0 && now - file->accessed <= cache->inactive) { |
708 return; | |
709 } | |
710 | |
1765 | 711 ngx_queue_remove(q); |
1453 | 712 |
713 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
714 | |
715 cache->current--; | |
716 | |
717 ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, | |
718 "expire cached open file: %s", file->name); | |
719 | |
720 if (!file->err && !file->is_dir) { | |
721 file->close = 1; | |
1772 | 722 ngx_close_cached_file(cache, file, 0, log); |
1453 | 723 |
724 } else { | |
725 ngx_free(file->name); | |
726 ngx_free(file); | |
727 } | |
728 } | |
729 } | |
730 | |
731 | |
732 static void | |
733 ngx_open_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
734 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) | |
735 { | |
736 ngx_rbtree_node_t **p; | |
737 ngx_cached_open_file_t *file, *file_temp; | |
738 | |
739 for ( ;; ) { | |
740 | |
741 if (node->key < temp->key) { | |
742 | |
743 p = &temp->left; | |
744 | |
745 } else if (node->key > temp->key) { | |
746 | |
747 p = &temp->right; | |
748 | |
749 } else { /* node->key == temp->key */ | |
750 | |
751 file = (ngx_cached_open_file_t *) node; | |
752 file_temp = (ngx_cached_open_file_t *) temp; | |
753 | |
754 p = (ngx_strcmp(file->name, file_temp->name) < 0) | |
755 ? &temp->left : &temp->right; | |
756 } | |
757 | |
758 if (*p == sentinel) { | |
759 break; | |
760 } | |
761 | |
762 temp = *p; | |
763 } | |
764 | |
765 *p = node; | |
766 node->parent = temp; | |
767 node->left = sentinel; | |
768 node->right = sentinel; | |
769 ngx_rbt_red(node); | |
770 } | |
771 | |
772 | |
1775 | 773 static ngx_cached_open_file_t * |
774 ngx_open_file_lookup(ngx_open_file_cache_t *cache, ngx_str_t *name, | |
775 uint32_t hash) | |
776 { | |
777 ngx_int_t rc; | |
778 ngx_rbtree_node_t *node, *sentinel; | |
779 ngx_cached_open_file_t *file; | |
780 | |
781 node = cache->rbtree.root; | |
782 sentinel = cache->rbtree.sentinel; | |
783 | |
784 while (node != sentinel) { | |
785 | |
786 if (hash < node->key) { | |
787 node = node->left; | |
788 continue; | |
789 } | |
790 | |
791 if (hash > node->key) { | |
792 node = node->right; | |
793 continue; | |
794 } | |
795 | |
796 /* hash == node->key */ | |
797 | |
798 do { | |
799 file = (ngx_cached_open_file_t *) node; | |
800 | |
801 rc = ngx_strcmp(name->data, file->name); | |
802 | |
803 if (rc == 0) { | |
804 return file; | |
805 } | |
806 | |
807 node = (rc < 0) ? node->left : node->right; | |
808 | |
809 } while (node != sentinel && hash == node->key); | |
810 | |
811 break; | |
812 } | |
813 | |
814 return NULL; | |
815 } | |
816 | |
817 | |
1453 | 818 static void |
819 ngx_open_file_cache_remove(ngx_event_t *ev) | |
820 { | |
821 ngx_cached_open_file_t *file; | |
822 ngx_open_file_cache_event_t *fev; | |
823 | |
824 fev = ev->data; | |
825 file = fev->file; | |
826 | |
1765 | 827 ngx_queue_remove(&file->queue); |
1453 | 828 |
829 ngx_rbtree_delete(&fev->cache->rbtree, &file->node); | |
830 | |
831 fev->cache->current--; | |
832 | |
833 /* NGX_ONESHOT_EVENT was already deleted */ | |
834 file->event = NULL; | |
2070 | 835 file->use_event = 0; |
1453 | 836 |
837 file->close = 1; | |
838 | |
1772 | 839 ngx_close_cached_file(fev->cache, file, 0, ev->log); |
1453 | 840 |
841 /* free memory only when fev->cache and fev->file are already not needed */ | |
842 | |
843 ngx_free(ev->data); | |
844 ngx_free(ev); | |
845 } |