Mercurial > hg > nginx
annotate src/core/ngx_open_file_cache.c @ 2756:09cab3f8d92e
*) of.test_only to not open file if only stat() is enough
*) of.failed to return exact name of failed syscall
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Mon, 27 Apr 2009 09:55:53 +0000 |
parents | 367b29612a00 |
children | 4bd7825fab80 |
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
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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; | |
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133 ngx_file_info_t fi; |
1453 | 134 ngx_pool_cleanup_t *cln; |
135 ngx_cached_open_file_t *file; | |
136 ngx_pool_cleanup_file_t *clnf; | |
137 ngx_open_file_cache_cleanup_t *ofcln; | |
138 | |
2069
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139 of->fd = NGX_INVALID_FILE; |
1453 | 140 of->err = 0; |
141 | |
142 if (cache == NULL) { | |
143 | |
2756
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144 if (of->test_only) { |
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145 |
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146 if (ngx_file_info(name->data, &fi) == -1) { |
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147 of->err = ngx_errno; |
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148 of->failed = ngx_file_info_n; |
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149 return NGX_ERROR; |
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150 } |
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151 |
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152 of->uniq = ngx_file_uniq(&fi); |
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153 of->mtime = ngx_file_mtime(&fi); |
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154 of->size = ngx_file_size(&fi); |
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155 of->is_dir = ngx_is_dir(&fi); |
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156 of->is_file = ngx_is_file(&fi); |
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157 of->is_link = ngx_is_link(&fi); |
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158 of->is_exec = ngx_is_exec(&fi); |
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159 |
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160 return NGX_OK; |
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161 } |
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162 |
1453 | 163 cln = ngx_pool_cleanup_add(pool, sizeof(ngx_pool_cleanup_file_t)); |
164 if (cln == NULL) { | |
165 return NGX_ERROR; | |
166 } | |
167 | |
168 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
169 | |
170 if (rc == NGX_OK && !of->is_dir) { | |
171 cln->handler = ngx_pool_cleanup_file; | |
172 clnf = cln->data; | |
173 | |
174 clnf->fd = of->fd; | |
175 clnf->name = name->data; | |
176 clnf->log = pool->log; | |
177 } | |
178 | |
179 return rc; | |
180 } | |
181 | |
182 cln = ngx_pool_cleanup_add(pool, sizeof(ngx_open_file_cache_cleanup_t)); | |
183 if (cln == NULL) { | |
184 return NGX_ERROR; | |
185 } | |
186 | |
187 now = ngx_time(); | |
188 | |
1775 | 189 hash = ngx_crc32_long(name->data, name->len); |
190 | |
191 file = ngx_open_file_lookup(cache, name, hash); | |
192 | |
193 if (file) { | |
194 | |
195 file->uses++; | |
196 | |
1987 | 197 ngx_queue_remove(&file->queue); |
198 | |
1775 | 199 if (file->fd == NGX_INVALID_FILE && file->err == 0 && !file->is_dir) { |
200 | |
201 /* file was not used often enough to keep open */ | |
202 | |
203 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
1453 | 204 |
1775 | 205 if (rc != NGX_OK && (of->err == 0 || !of->errors)) { |
206 goto failed; | |
207 } | |
208 | |
209 goto add_event; | |
1453 | 210 } |
211 | |
2070 | 212 if (file->use_event |
2063
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213 || (file->event == NULL |
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214 && (of->uniq == 0 || of->uniq == file->uniq) |
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215 && now - file->created < of->valid)) |
1775 | 216 { |
217 if (file->err == 0) { | |
1772 | 218 |
1775 | 219 of->fd = file->fd; |
220 of->uniq = file->uniq; | |
221 of->mtime = file->mtime; | |
222 of->size = file->size; | |
1453 | 223 |
1775 | 224 of->is_dir = file->is_dir; |
225 of->is_file = file->is_file; | |
226 of->is_link = file->is_link; | |
227 of->is_exec = file->is_exec; | |
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228 of->is_directio = file->is_directio; |
1453 | 229 |
1775 | 230 if (!file->is_dir) { |
231 file->count++; | |
232 ngx_open_file_add_event(cache, file, of, pool->log); | |
1453 | 233 } |
234 | |
1775 | 235 } else { |
236 of->err = file->err; | |
237 } | |
238 | |
239 goto found; | |
240 } | |
241 | |
242 ngx_log_debug4(NGX_LOG_DEBUG_CORE, pool->log, 0, | |
243 "retest open file: %s, fd:%d, c:%d, e:%d", | |
244 file->name, file->fd, file->count, file->err); | |
1453 | 245 |
1775 | 246 if (file->is_dir) { |
247 | |
248 /* | |
249 * chances that directory became file are very small | |
250 * so test_dir flag allows to use a single syscall | |
251 * in ngx_file_info() instead of three syscalls | |
252 */ | |
253 | |
254 of->test_dir = 1; | |
255 } | |
256 | |
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use ngx_file_info() and test uniq if file is already open
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257 of->fd = file->fd; |
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use ngx_file_info() and test uniq if file is already open
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258 of->uniq = file->uniq; |
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use ngx_file_info() and test uniq if file is already open
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259 |
1775 | 260 rc = ngx_open_and_stat_file(name->data, of, pool->log); |
1453 | 261 |
1775 | 262 if (rc != NGX_OK && (of->err == 0 || !of->errors)) { |
263 goto failed; | |
264 } | |
265 | |
266 if (of->is_dir) { | |
267 | |
268 if (file->is_dir || file->err) { | |
269 goto update; | |
270 } | |
271 | |
272 /* file became directory */ | |
1453 | 273 |
1775 | 274 } else if (of->err == 0) { /* file */ |
275 | |
276 if (file->is_dir || file->err) { | |
277 goto add_event; | |
278 } | |
1453 | 279 |
2070 | 280 if (of->uniq == file->uniq) { |
1453 | 281 |
1775 | 282 file->count++; |
1453 | 283 |
1775 | 284 if (file->event) { |
285 file->use_event = 1; | |
1453 | 286 } |
287 | |
1775 | 288 goto renew; |
289 } | |
1453 | 290 |
1775 | 291 /* file was changed */ |
1453 | 292 |
1775 | 293 } else { /* error to cache */ |
1453 | 294 |
1775 | 295 if (file->err || file->is_dir) { |
296 goto update; | |
1453 | 297 } |
298 | |
1775 | 299 /* file was removed, etc. */ |
300 } | |
301 | |
302 if (file->count == 0) { | |
303 | |
304 ngx_open_file_del_event(file); | |
1453 | 305 |
1775 | 306 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { |
307 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, | |
308 ngx_close_file_n " \"%s\" failed", | |
309 name->data); | |
310 } | |
1453 | 311 |
1775 | 312 goto add_event; |
313 } | |
314 | |
315 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
316 | |
317 cache->current--; | |
318 | |
319 file->close = 1; | |
320 | |
321 goto create; | |
1453 | 322 } |
323 | |
324 /* not found */ | |
325 | |
326 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
327 | |
328 if (rc != NGX_OK && (of->err == 0 || !of->errors)) { | |
329 goto failed; | |
330 } | |
331 | |
332 create: | |
333 | |
334 if (cache->current >= cache->max) { | |
335 ngx_expire_old_cached_files(cache, 0, pool->log); | |
336 } | |
337 | |
338 file = ngx_alloc(sizeof(ngx_cached_open_file_t), pool->log); | |
339 | |
340 if (file == NULL) { | |
341 goto failed; | |
342 } | |
343 | |
344 file->name = ngx_alloc(name->len + 1, pool->log); | |
345 | |
346 if (file->name == NULL) { | |
347 ngx_free(file); | |
348 file = NULL; | |
349 goto failed; | |
350 } | |
351 | |
352 ngx_cpystrn(file->name, name->data, name->len + 1); | |
353 | |
354 file->node.key = hash; | |
355 | |
356 ngx_rbtree_insert(&cache->rbtree, &file->node); | |
357 | |
358 cache->current++; | |
359 | |
1775 | 360 file->uses = 1; |
1453 | 361 file->count = 0; |
1775 | 362 file->event = NULL; |
363 | |
364 add_event: | |
365 | |
366 ngx_open_file_add_event(cache, file, of, pool->log); | |
1453 | 367 |
368 update: | |
369 | |
370 file->fd = of->fd; | |
371 file->err = of->err; | |
372 | |
373 if (of->err == 0) { | |
374 file->uniq = of->uniq; | |
375 file->mtime = of->mtime; | |
376 file->size = of->size; | |
377 | |
378 file->close = 0; | |
379 | |
380 file->is_dir = of->is_dir; | |
381 file->is_file = of->is_file; | |
382 file->is_link = of->is_link; | |
383 file->is_exec = of->is_exec; | |
2246
987831d73bd8
cache directio flag in open file cache
Igor Sysoev <igor@sysoev.ru>
parents:
2231
diff
changeset
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384 file->is_directio = of->is_directio; |
1453 | 385 |
386 if (!of->is_dir) { | |
387 file->count++; | |
388 } | |
389 } | |
390 | |
391 renew: | |
392 | |
393 file->created = now; | |
394 | |
395 found: | |
396 | |
397 file->accessed = now; | |
398 | |
1765 | 399 ngx_queue_insert_head(&cache->expire_queue, &file->queue); |
1453 | 400 |
1772 | 401 ngx_log_debug5(NGX_LOG_DEBUG_CORE, pool->log, 0, |
402 "cached open file: %s, fd:%d, c:%d, e:%d, u:%d", | |
403 file->name, file->fd, file->count, file->err, file->uses); | |
1453 | 404 |
405 if (of->err == 0) { | |
406 | |
407 if (!of->is_dir) { | |
408 cln->handler = ngx_open_file_cleanup; | |
409 ofcln = cln->data; | |
410 | |
411 ofcln->cache = cache; | |
412 ofcln->file = file; | |
1772 | 413 ofcln->min_uses = of->min_uses; |
1453 | 414 ofcln->log = pool->log; |
415 } | |
416 | |
417 return NGX_OK; | |
418 } | |
419 | |
420 return NGX_ERROR; | |
421 | |
422 failed: | |
423 | |
1988
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
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424 if (file) { |
1453 | 425 ngx_rbtree_delete(&cache->rbtree, &file->node); |
426 | |
427 cache->current--; | |
428 | |
1988
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
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429 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
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430 |
2006
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
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431 if (file->fd != NGX_INVALID_FILE) { |
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
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432 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
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433 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
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434 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
|
435 file->name); |
2006
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
436 } |
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
437 } |
1988
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
438 |
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
439 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
|
440 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
|
441 |
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
442 } else { |
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
443 file->close = 1; |
1453 | 444 } |
445 } | |
446 | |
447 if (of->fd != NGX_INVALID_FILE) { | |
448 if (ngx_close_file(of->fd) == NGX_FILE_ERROR) { | |
449 ngx_log_error(NGX_LOG_ALERT, pool->log, ngx_errno, | |
450 ngx_close_file_n " \"%s\" failed", name->data); | |
451 } | |
452 } | |
453 | |
454 return NGX_ERROR; | |
455 } | |
456 | |
457 | |
458 static ngx_int_t | |
459 ngx_open_and_stat_file(u_char *name, ngx_open_file_info_t *of, ngx_log_t *log) | |
460 { | |
461 ngx_fd_t fd; | |
462 ngx_file_info_t fi; | |
463 | |
2070 | 464 if (of->fd != NGX_INVALID_FILE) { |
1453 | 465 |
466 if (ngx_file_info(name, &fi) == -1) { | |
2756
09cab3f8d92e
*) of.test_only to not open file if only stat() is enough
Igor Sysoev <igor@sysoev.ru>
parents:
2629
diff
changeset
|
467 of->failed = ngx_file_info_n; |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
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parents:
2063
diff
changeset
|
468 goto failed; |
1453 | 469 } |
470 | |
2070 | 471 if (of->uniq == ngx_file_uniq(&fi)) { |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
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parents:
2063
diff
changeset
|
472 goto done; |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
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parents:
2063
diff
changeset
|
473 } |
1453 | 474 |
2070 | 475 } else if (of->test_dir) { |
476 | |
477 if (ngx_file_info(name, &fi) == -1) { | |
2756
09cab3f8d92e
*) of.test_only to not open file if only stat() is enough
Igor Sysoev <igor@sysoev.ru>
parents:
2629
diff
changeset
|
478 of->failed = ngx_file_info_n; |
2070 | 479 goto failed; |
480 } | |
481 | |
2460
225fa4abd76f
test ngx_file_info() result, the bug has been introduced in r2070
Igor Sysoev <igor@sysoev.ru>
parents:
2246
diff
changeset
|
482 if (ngx_is_dir(&fi)) { |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
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parents:
2063
diff
changeset
|
483 goto done; |
1453 | 484 } |
485 } | |
486 | |
2072 | 487 if (!of->log) { |
488 fd = ngx_open_file(name, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0); | |
489 | |
490 } else { | |
2629
367b29612a00
Win32 appends synchronized if only FILE_APPEND_DATA and SYNCHRONIZE are set
Igor Sysoev <igor@sysoev.ru>
parents:
2628
diff
changeset
|
491 fd = ngx_open_file(name, NGX_FILE_APPEND, NGX_FILE_CREATE_OR_OPEN, |
367b29612a00
Win32 appends synchronized if only FILE_APPEND_DATA and SYNCHRONIZE are set
Igor Sysoev <igor@sysoev.ru>
parents:
2628
diff
changeset
|
492 NGX_FILE_DEFAULT_ACCESS); |
2072 | 493 } |
1453 | 494 |
495 if (fd == NGX_INVALID_FILE) { | |
2756
09cab3f8d92e
*) of.test_only to not open file if only stat() is enough
Igor Sysoev <igor@sysoev.ru>
parents:
2629
diff
changeset
|
496 of->failed = ngx_open_file_n; |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
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parents:
2063
diff
changeset
|
497 goto failed; |
1453 | 498 } |
499 | |
500 if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) { | |
501 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno, | |
502 ngx_fd_info_n " \"%s\" failed", name); | |
503 | |
504 if (ngx_close_file(fd) == NGX_FILE_ERROR) { | |
505 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
506 ngx_close_file_n " \"%s\" failed", name); | |
507 } | |
508 | |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
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parents:
2063
diff
changeset
|
509 of->fd = NGX_INVALID_FILE; |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
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parents:
2063
diff
changeset
|
510 |
1453 | 511 return NGX_ERROR; |
512 } | |
513 | |
514 if (ngx_is_dir(&fi)) { | |
515 if (ngx_close_file(fd) == NGX_FILE_ERROR) { | |
516 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
517 ngx_close_file_n " \"%s\" failed", name); | |
518 } | |
519 | |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
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parents:
2063
diff
changeset
|
520 of->fd = NGX_INVALID_FILE; |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
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parents:
2063
diff
changeset
|
521 |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
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parents:
2063
diff
changeset
|
522 } else { |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
523 of->fd = fd; |
2129 | 524 |
525 if (of->directio <= ngx_file_size(&fi)) { | |
2246
987831d73bd8
cache directio flag in open file cache
Igor Sysoev <igor@sysoev.ru>
parents:
2231
diff
changeset
|
526 if (ngx_directio_on(fd) == -1) { |
2129 | 527 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, |
2246
987831d73bd8
cache directio flag in open file cache
Igor Sysoev <igor@sysoev.ru>
parents:
2231
diff
changeset
|
528 ngx_directio_on_n " \"%s\" failed", name); |
2231
8564129d49b6
*) handle unaligned file part for directio
Igor Sysoev <igor@sysoev.ru>
parents:
2129
diff
changeset
|
529 |
8564129d49b6
*) handle unaligned file part for directio
Igor Sysoev <igor@sysoev.ru>
parents:
2129
diff
changeset
|
530 } else { |
8564129d49b6
*) handle unaligned file part for directio
Igor Sysoev <igor@sysoev.ru>
parents:
2129
diff
changeset
|
531 of->is_directio = 1; |
2129 | 532 } |
533 } | |
1453 | 534 } |
535 | |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
536 done: |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
537 |
1453 | 538 of->uniq = ngx_file_uniq(&fi); |
539 of->mtime = ngx_file_mtime(&fi); | |
540 of->size = ngx_file_size(&fi); | |
541 of->is_dir = ngx_is_dir(&fi); | |
542 of->is_file = ngx_is_file(&fi); | |
543 of->is_link = ngx_is_link(&fi); | |
544 of->is_exec = ngx_is_exec(&fi); | |
545 | |
546 return NGX_OK; | |
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
547 |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
548 failed: |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
549 |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
550 of->fd = NGX_INVALID_FILE; |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
551 of->err = ngx_errno; |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
552 |
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
553 return NGX_ERROR; |
1453 | 554 } |
555 | |
556 | |
1775 | 557 /* |
558 * we ignore any possible event setting error and | |
559 * fallback to usual periodic file retests | |
560 */ | |
561 | |
562 static void | |
563 ngx_open_file_add_event(ngx_open_file_cache_t *cache, | |
564 ngx_cached_open_file_t *file, ngx_open_file_info_t *of, ngx_log_t *log) | |
565 { | |
566 ngx_open_file_cache_event_t *fev; | |
567 | |
568 if (!(ngx_event_flags & NGX_USE_VNODE_EVENT) | |
569 || !of->events | |
570 || file->event | |
571 || of->fd == NGX_INVALID_FILE | |
572 || file->uses < of->min_uses) | |
573 { | |
574 return; | |
575 } | |
576 | |
2070 | 577 file->use_event = 0; |
578 | |
1775 | 579 file->event = ngx_calloc(sizeof(ngx_event_t), log); |
580 if (file->event== NULL) { | |
581 return; | |
582 } | |
583 | |
584 fev = ngx_alloc(sizeof(ngx_open_file_cache_event_t), log); | |
585 if (fev == NULL) { | |
586 ngx_free(file->event); | |
587 file->event = NULL; | |
588 return; | |
589 } | |
590 | |
591 fev->fd = of->fd; | |
592 fev->file = file; | |
593 fev->cache = cache; | |
594 | |
595 file->event->handler = ngx_open_file_cache_remove; | |
596 file->event->data = fev; | |
597 | |
598 /* | |
599 * although vnode event may be called while ngx_cycle->poll | |
600 * destruction, however, cleanup procedures are run before any | |
601 * memory freeing and events will be canceled. | |
602 */ | |
603 | |
604 file->event->log = ngx_cycle->log; | |
605 | |
606 if (ngx_add_event(file->event, NGX_VNODE_EVENT, NGX_ONESHOT_EVENT) | |
607 != NGX_OK) | |
608 { | |
609 ngx_free(file->event->data); | |
610 ngx_free(file->event); | |
611 file->event = NULL; | |
612 return; | |
613 } | |
614 | |
615 /* | |
2071 | 616 * we do not set file->use_event here because there may be a race |
617 * condition: a file may be deleted between opening the file and | |
618 * adding event, so we rely upon event notification only after | |
619 * one file revalidation on next file access | |
1775 | 620 */ |
621 | |
622 return; | |
623 } | |
624 | |
625 | |
1453 | 626 static void |
627 ngx_open_file_cleanup(void *data) | |
628 { | |
629 ngx_open_file_cache_cleanup_t *c = data; | |
630 | |
631 c->file->count--; | |
632 | |
1772 | 633 ngx_close_cached_file(c->cache, c->file, c->min_uses, c->log); |
1453 | 634 |
635 /* drop one or two expired open files */ | |
636 ngx_expire_old_cached_files(c->cache, 1, c->log); | |
637 } | |
638 | |
639 | |
640 static void | |
641 ngx_close_cached_file(ngx_open_file_cache_t *cache, | |
1772 | 642 ngx_cached_open_file_t *file, ngx_uint_t min_uses, ngx_log_t *log) |
1453 | 643 { |
1772 | 644 ngx_log_debug5(NGX_LOG_DEBUG_CORE, log, 0, |
645 "close cached open file: %s, fd:%d, c:%d, u:%d, %d", | |
646 file->name, file->fd, file->count, file->uses, file->close); | |
1453 | 647 |
648 if (!file->close) { | |
649 | |
650 file->accessed = ngx_time(); | |
651 | |
1765 | 652 ngx_queue_remove(&file->queue); |
1453 | 653 |
1765 | 654 ngx_queue_insert_head(&cache->expire_queue, &file->queue); |
1453 | 655 |
1772 | 656 if (file->uses >= min_uses || file->count) { |
657 return; | |
658 } | |
1453 | 659 } |
660 | |
1775 | 661 ngx_open_file_del_event(file); |
1453 | 662 |
663 if (file->count) { | |
664 return; | |
665 } | |
666 | |
1772 | 667 if (file->fd != NGX_INVALID_FILE) { |
668 | |
669 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { | |
670 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
671 ngx_close_file_n " \"%s\" failed", file->name); | |
672 } | |
673 | |
674 file->fd = NGX_INVALID_FILE; | |
675 } | |
676 | |
677 if (!file->close) { | |
678 return; | |
1453 | 679 } |
680 | |
681 ngx_free(file->name); | |
682 ngx_free(file); | |
683 } | |
684 | |
685 | |
686 static void | |
1775 | 687 ngx_open_file_del_event(ngx_cached_open_file_t *file) |
688 { | |
689 if (file->event == NULL) { | |
690 return; | |
691 } | |
692 | |
693 (void) ngx_del_event(file->event, NGX_VNODE_EVENT, | |
694 file->count ? NGX_FLUSH_EVENT : NGX_CLOSE_EVENT); | |
695 | |
696 ngx_free(file->event->data); | |
697 ngx_free(file->event); | |
698 file->event = NULL; | |
699 file->use_event = 0; | |
700 } | |
701 | |
702 | |
703 static void | |
1453 | 704 ngx_expire_old_cached_files(ngx_open_file_cache_t *cache, ngx_uint_t n, |
705 ngx_log_t *log) | |
706 { | |
707 time_t now; | |
1765 | 708 ngx_queue_t *q; |
1453 | 709 ngx_cached_open_file_t *file; |
710 | |
711 now = ngx_time(); | |
712 | |
713 /* | |
714 * n == 1 deletes one or two inactive files | |
715 * n == 0 deletes least recently used file by force | |
716 * and one or two inactive files | |
717 */ | |
718 | |
719 while (n < 3) { | |
720 | |
1765 | 721 if (ngx_queue_empty(&cache->expire_queue)) { |
1453 | 722 return; |
723 } | |
724 | |
1765 | 725 q = ngx_queue_last(&cache->expire_queue); |
726 | |
727 file = ngx_queue_data(q, ngx_cached_open_file_t, queue); | |
728 | |
1453 | 729 if (n++ != 0 && now - file->accessed <= cache->inactive) { |
730 return; | |
731 } | |
732 | |
1765 | 733 ngx_queue_remove(q); |
1453 | 734 |
735 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
736 | |
737 cache->current--; | |
738 | |
739 ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, | |
740 "expire cached open file: %s", file->name); | |
741 | |
742 if (!file->err && !file->is_dir) { | |
743 file->close = 1; | |
1772 | 744 ngx_close_cached_file(cache, file, 0, log); |
1453 | 745 |
746 } else { | |
747 ngx_free(file->name); | |
748 ngx_free(file); | |
749 } | |
750 } | |
751 } | |
752 | |
753 | |
754 static void | |
755 ngx_open_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
756 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) | |
757 { | |
758 ngx_rbtree_node_t **p; | |
759 ngx_cached_open_file_t *file, *file_temp; | |
760 | |
761 for ( ;; ) { | |
762 | |
763 if (node->key < temp->key) { | |
764 | |
765 p = &temp->left; | |
766 | |
767 } else if (node->key > temp->key) { | |
768 | |
769 p = &temp->right; | |
770 | |
771 } else { /* node->key == temp->key */ | |
772 | |
773 file = (ngx_cached_open_file_t *) node; | |
774 file_temp = (ngx_cached_open_file_t *) temp; | |
775 | |
776 p = (ngx_strcmp(file->name, file_temp->name) < 0) | |
777 ? &temp->left : &temp->right; | |
778 } | |
779 | |
780 if (*p == sentinel) { | |
781 break; | |
782 } | |
783 | |
784 temp = *p; | |
785 } | |
786 | |
787 *p = node; | |
788 node->parent = temp; | |
789 node->left = sentinel; | |
790 node->right = sentinel; | |
791 ngx_rbt_red(node); | |
792 } | |
793 | |
794 | |
1775 | 795 static ngx_cached_open_file_t * |
796 ngx_open_file_lookup(ngx_open_file_cache_t *cache, ngx_str_t *name, | |
797 uint32_t hash) | |
798 { | |
799 ngx_int_t rc; | |
800 ngx_rbtree_node_t *node, *sentinel; | |
801 ngx_cached_open_file_t *file; | |
802 | |
803 node = cache->rbtree.root; | |
804 sentinel = cache->rbtree.sentinel; | |
805 | |
806 while (node != sentinel) { | |
807 | |
808 if (hash < node->key) { | |
809 node = node->left; | |
810 continue; | |
811 } | |
812 | |
813 if (hash > node->key) { | |
814 node = node->right; | |
815 continue; | |
816 } | |
817 | |
818 /* hash == node->key */ | |
819 | |
820 do { | |
821 file = (ngx_cached_open_file_t *) node; | |
822 | |
823 rc = ngx_strcmp(name->data, file->name); | |
824 | |
825 if (rc == 0) { | |
826 return file; | |
827 } | |
828 | |
829 node = (rc < 0) ? node->left : node->right; | |
830 | |
831 } while (node != sentinel && hash == node->key); | |
832 | |
833 break; | |
834 } | |
835 | |
836 return NULL; | |
837 } | |
838 | |
839 | |
1453 | 840 static void |
841 ngx_open_file_cache_remove(ngx_event_t *ev) | |
842 { | |
843 ngx_cached_open_file_t *file; | |
844 ngx_open_file_cache_event_t *fev; | |
845 | |
846 fev = ev->data; | |
847 file = fev->file; | |
848 | |
1765 | 849 ngx_queue_remove(&file->queue); |
1453 | 850 |
851 ngx_rbtree_delete(&fev->cache->rbtree, &file->node); | |
852 | |
853 fev->cache->current--; | |
854 | |
855 /* NGX_ONESHOT_EVENT was already deleted */ | |
856 file->event = NULL; | |
2070 | 857 file->use_event = 0; |
1453 | 858 |
859 file->close = 1; | |
860 | |
1772 | 861 ngx_close_cached_file(fev->cache, file, 0, ev->log); |
1453 | 862 |
863 /* free memory only when fev->cache and fev->file are already not needed */ | |
864 | |
865 ngx_free(ev->data); | |
866 ngx_free(ev); | |
867 } |