Mercurial > hg > nginx
annotate src/core/ngx_open_file_cache.c @ 3178:975f0558aab3
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| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Wed, 30 Sep 2009 13:21:52 +0000 |
| parents | b1b1775698d5 |
| children | ac281bc4c187 |
| 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 | |
| 3178 | 20 #define NGX_MIN_READ_AHEAD (128 * 1024) |
| 21 | |
| 22 | |
| 1453 | 23 static void ngx_open_file_cache_cleanup(void *data); |
| 1775 | 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); | |
| 1453 | 28 static void ngx_open_file_cleanup(void *data); |
| 29 static void ngx_close_cached_file(ngx_open_file_cache_t *cache, | |
| 1772 | 30 ngx_cached_open_file_t *file, ngx_uint_t min_uses, ngx_log_t *log); |
| 1775 | 31 static void ngx_open_file_del_event(ngx_cached_open_file_t *file); |
| 1453 | 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); | |
| 1775 | 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); | |
| 1453 | 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 | |
| 1761 | 53 ngx_rbtree_init(&cache->rbtree, &cache->sentinel, |
|
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54 ngx_open_file_cache_rbtree_insert_value); |
| 1453 | 55 |
| 1765 | 56 ngx_queue_init(&cache->expire_queue); |
| 57 | |
| 1453 | 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 | |
| 1765 | 79 ngx_queue_t *q; |
| 1453 | 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 | |
| 1765 | 87 if (ngx_queue_empty(&cache->expire_queue)) { |
| 1766 | 88 break; |
| 1453 | 89 } |
| 90 | |
| 1765 | 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); | |
| 1453 | 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; | |
| 1772 | 107 ngx_close_cached_file(cache, file, 0, ngx_cycle->log); |
| 1453 | 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; | |
|
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136 ngx_file_info_t fi; |
| 1453 | 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 | |
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142 of->fd = NGX_INVALID_FILE; |
| 1453 | 143 of->err = 0; |
| 144 | |
| 145 if (cache == NULL) { | |
| 146 | |
|
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147 if (of->test_only) { |
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148 |
|
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149 if (ngx_file_info(name->data, &fi) == NGX_FILE_ERROR) { |
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150 of->err = ngx_errno; |
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151 of->failed = ngx_file_info_n; |
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152 return NGX_ERROR; |
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153 } |
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154 |
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155 of->uniq = ngx_file_uniq(&fi); |
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156 of->mtime = ngx_file_mtime(&fi); |
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157 of->size = ngx_file_size(&fi); |
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158 of->is_dir = ngx_is_dir(&fi); |
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159 of->is_file = ngx_is_file(&fi); |
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160 of->is_link = ngx_is_link(&fi); |
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161 of->is_exec = ngx_is_exec(&fi); |
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162 |
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163 return NGX_OK; |
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*) of.test_only to not open file if only stat() is enough
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164 } |
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*) of.test_only to not open file if only stat() is enough
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parents:
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165 |
| 1453 | 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 | |
| 1775 | 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 | |
| 1987 | 200 ngx_queue_remove(&file->queue); |
| 201 | |
| 1775 | 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); | |
| 1453 | 207 |
| 1775 | 208 if (rc != NGX_OK && (of->err == 0 || !of->errors)) { |
| 209 goto failed; | |
| 210 } | |
| 211 | |
| 212 goto add_event; | |
| 1453 | 213 } |
| 214 | |
| 2070 | 215 if (file->use_event |
|
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216 || (file->event == NULL |
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217 && (of->uniq == 0 || of->uniq == file->uniq) |
|
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218 && now - file->created < of->valid)) |
| 1775 | 219 { |
| 220 if (file->err == 0) { | |
| 1772 | 221 |
| 1775 | 222 of->fd = file->fd; |
| 223 of->uniq = file->uniq; | |
| 224 of->mtime = file->mtime; | |
| 225 of->size = file->size; | |
| 1453 | 226 |
| 1775 | 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; | |
|
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231 of->is_directio = file->is_directio; |
| 1453 | 232 |
| 1775 | 233 if (!file->is_dir) { |
| 234 file->count++; | |
| 235 ngx_open_file_add_event(cache, file, of, pool->log); | |
| 1453 | 236 } |
| 237 | |
| 1775 | 238 } else { |
| 239 of->err = file->err; | |
|
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240 of->failed = ngx_open_file_n; |
| 1775 | 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); | |
| 1453 | 249 |
| 1775 | 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 | |
|
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261 of->fd = file->fd; |
|
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262 of->uniq = file->uniq; |
|
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use ngx_file_info() and test uniq if file is already open
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parents:
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diff
changeset
|
263 |
| 1775 | 264 rc = ngx_open_and_stat_file(name->data, of, pool->log); |
| 1453 | 265 |
| 1775 | 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 */ | |
| 1453 | 277 |
| 1775 | 278 } else if (of->err == 0) { /* file */ |
| 279 | |
| 280 if (file->is_dir || file->err) { | |
| 281 goto add_event; | |
| 282 } | |
| 1453 | 283 |
| 2070 | 284 if (of->uniq == file->uniq) { |
| 1453 | 285 |
| 1775 | 286 file->count++; |
| 1453 | 287 |
| 1775 | 288 if (file->event) { |
| 289 file->use_event = 1; | |
| 1453 | 290 } |
| 291 | |
| 1775 | 292 goto renew; |
| 293 } | |
| 1453 | 294 |
| 1775 | 295 /* file was changed */ |
| 1453 | 296 |
| 1775 | 297 } else { /* error to cache */ |
| 1453 | 298 |
| 1775 | 299 if (file->err || file->is_dir) { |
| 300 goto update; | |
| 1453 | 301 } |
| 302 | |
| 1775 | 303 /* file was removed, etc. */ |
| 304 } | |
| 305 | |
| 306 if (file->count == 0) { | |
| 307 | |
| 308 ngx_open_file_del_event(file); | |
| 1453 | 309 |
| 1775 | 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 } | |
| 1453 | 315 |
| 1775 | 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; | |
| 1453 | 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 | |
| 1775 | 364 file->uses = 1; |
| 1453 | 365 file->count = 0; |
|
2934
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initialize use_event field in open file cache
Igor Sysoev <igor@sysoev.ru>
parents:
2783
diff
changeset
|
366 file->use_event = 0; |
| 1775 | 367 file->event = NULL; |
| 368 | |
| 369 add_event: | |
| 370 | |
| 371 ngx_open_file_add_event(cache, file, of, pool->log); | |
| 1453 | 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; | |
|
2246
987831d73bd8
cache directio flag in open file cache
Igor Sysoev <igor@sysoev.ru>
parents:
2231
diff
changeset
|
389 file->is_directio = of->is_directio; |
| 1453 | 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 | |
| 1765 | 404 ngx_queue_insert_head(&cache->expire_queue, &file->queue); |
| 1453 | 405 |
| 1772 | 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); | |
| 1453 | 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; | |
| 1772 | 418 ofcln->min_uses = of->min_uses; |
| 1453 | 419 ofcln->log = pool->log; |
| 420 } | |
| 421 | |
| 422 return NGX_OK; | |
| 423 } | |
| 424 | |
| 425 return NGX_ERROR; | |
| 426 | |
| 427 failed: | |
| 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
|
429 if (file) { |
| 1453 | 430 ngx_rbtree_delete(&cache->rbtree, &file->node); |
| 431 | |
| 432 cache->current--; | |
| 433 | |
|
1988
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
434 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
|
435 |
|
2006
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
436 if (file->fd != NGX_INVALID_FILE) { |
|
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
437 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
|
438 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
|
439 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
|
440 file->name); |
|
2006
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
441 } |
|
b52cb9bf2064
style fix: remove tabs and trailing spaces
Igor Sysoev <igor@sysoev.ru>
parents:
1988
diff
changeset
|
442 } |
|
1988
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
443 |
|
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
444 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
|
445 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
|
446 |
|
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
447 } else { |
|
34051c712e41
fix segfault when file is deleted and open_file_cache_errors is off
Igor Sysoev <igor@sysoev.ru>
parents:
1987
diff
changeset
|
448 file->close = 1; |
| 1453 | 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 | |
| 2070 | 469 if (of->fd != NGX_INVALID_FILE) { |
| 1453 | 470 |
|
2782
4bd7825fab80
uniform ngx_file_info() interface with ngx_fd_info()
Igor Sysoev <igor@sysoev.ru>
parents:
2756
diff
changeset
|
471 if (ngx_file_info(name, &fi) == NGX_FILE_ERROR) { |
|
2756
09cab3f8d92e
*) of.test_only to not open file if only stat() is enough
Igor Sysoev <igor@sysoev.ru>
parents:
2629
diff
changeset
|
472 of->failed = ngx_file_info_n; |
|
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
473 goto failed; |
| 1453 | 474 } |
| 475 | |
| 2070 | 476 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
|
477 goto done; |
|
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
478 } |
| 1453 | 479 |
| 2070 | 480 } else if (of->test_dir) { |
| 481 | |
|
2782
4bd7825fab80
uniform ngx_file_info() interface with ngx_fd_info()
Igor Sysoev <igor@sysoev.ru>
parents:
2756
diff
changeset
|
482 if (ngx_file_info(name, &fi) == NGX_FILE_ERROR) { |
|
2756
09cab3f8d92e
*) of.test_only to not open file if only stat() is enough
Igor Sysoev <igor@sysoev.ru>
parents:
2629
diff
changeset
|
483 of->failed = ngx_file_info_n; |
| 2070 | 484 goto failed; |
| 485 } | |
| 486 | |
|
2460
225fa4abd76f
test ngx_file_info() result, the bug has been introduced in r2070
Igor Sysoev <igor@sysoev.ru>
parents:
2246
diff
changeset
|
487 if (ngx_is_dir(&fi)) { |
|
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
488 goto done; |
| 1453 | 489 } |
| 490 } | |
| 491 | |
| 2072 | 492 if (!of->log) { |
| 493 fd = ngx_open_file(name, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0); | |
| 494 | |
| 495 } else { | |
|
2629
367b29612a00
Win32 appends synchronized if only FILE_APPEND_DATA and SYNCHRONIZE are set
Igor Sysoev <igor@sysoev.ru>
parents:
2628
diff
changeset
|
496 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
|
497 NGX_FILE_DEFAULT_ACCESS); |
| 2072 | 498 } |
| 1453 | 499 |
| 500 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
|
501 of->failed = ngx_open_file_n; |
|
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
502 goto failed; |
| 1453 | 503 } |
| 504 | |
| 505 if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) { | |
| 506 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno, | |
| 507 ngx_fd_info_n " \"%s\" failed", name); | |
| 508 | |
| 509 if (ngx_close_file(fd) == NGX_FILE_ERROR) { | |
| 510 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
| 511 ngx_close_file_n " \"%s\" failed", name); | |
| 512 } | |
| 513 | |
|
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
514 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
|
515 |
| 1453 | 516 return NGX_ERROR; |
| 517 } | |
| 518 | |
| 519 if (ngx_is_dir(&fi)) { | |
| 520 if (ngx_close_file(fd) == NGX_FILE_ERROR) { | |
| 521 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
| 522 ngx_close_file_n " \"%s\" failed", name); | |
| 523 } | |
| 524 | |
|
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
525 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
|
526 |
|
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
527 } else { |
|
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
528 of->fd = fd; |
| 2129 | 529 |
| 3178 | 530 if (of->read_ahead && ngx_file_size(&fi) > NGX_MIN_READ_AHEAD) { |
| 531 if (ngx_read_ahead(fd, of->read_ahead) == NGX_ERROR) { | |
| 532 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
| 533 ngx_read_ahead_n " \"%s\" failed", name); | |
| 534 } | |
| 535 } | |
| 536 | |
| 2129 | 537 if (of->directio <= ngx_file_size(&fi)) { |
|
3164
b1b1775698d5
uniform ngx_directio_on/off() interface with other file functions
Igor Sysoev <igor@sysoev.ru>
parents:
2934
diff
changeset
|
538 if (ngx_directio_on(fd) == NGX_FILE_ERROR) { |
| 2129 | 539 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
|
540 ngx_directio_on_n " \"%s\" failed", name); |
|
2231
8564129d49b6
*) handle unaligned file part for directio
Igor Sysoev <igor@sysoev.ru>
parents:
2129
diff
changeset
|
541 |
|
8564129d49b6
*) handle unaligned file part for directio
Igor Sysoev <igor@sysoev.ru>
parents:
2129
diff
changeset
|
542 } else { |
|
8564129d49b6
*) handle unaligned file part for directio
Igor Sysoev <igor@sysoev.ru>
parents:
2129
diff
changeset
|
543 of->is_directio = 1; |
| 2129 | 544 } |
| 545 } | |
| 1453 | 546 } |
| 547 | |
|
2069
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
548 done: |
|
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
549 |
| 1453 | 550 of->uniq = ngx_file_uniq(&fi); |
| 551 of->mtime = ngx_file_mtime(&fi); | |
| 552 of->size = ngx_file_size(&fi); | |
| 553 of->is_dir = ngx_is_dir(&fi); | |
| 554 of->is_file = ngx_is_file(&fi); | |
| 555 of->is_link = ngx_is_link(&fi); | |
| 556 of->is_exec = ngx_is_exec(&fi); | |
| 557 | |
| 558 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
|
559 |
|
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
560 failed: |
|
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
561 |
|
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
562 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
|
563 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
|
564 |
|
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
565 return NGX_ERROR; |
| 1453 | 566 } |
| 567 | |
| 568 | |
| 1775 | 569 /* |
| 570 * we ignore any possible event setting error and | |
| 571 * fallback to usual periodic file retests | |
| 572 */ | |
| 573 | |
| 574 static void | |
| 575 ngx_open_file_add_event(ngx_open_file_cache_t *cache, | |
| 576 ngx_cached_open_file_t *file, ngx_open_file_info_t *of, ngx_log_t *log) | |
| 577 { | |
| 578 ngx_open_file_cache_event_t *fev; | |
| 579 | |
| 580 if (!(ngx_event_flags & NGX_USE_VNODE_EVENT) | |
| 581 || !of->events | |
| 582 || file->event | |
| 583 || of->fd == NGX_INVALID_FILE | |
| 584 || file->uses < of->min_uses) | |
| 585 { | |
| 586 return; | |
| 587 } | |
| 588 | |
| 2070 | 589 file->use_event = 0; |
| 590 | |
| 1775 | 591 file->event = ngx_calloc(sizeof(ngx_event_t), log); |
| 592 if (file->event== NULL) { | |
| 593 return; | |
| 594 } | |
| 595 | |
| 596 fev = ngx_alloc(sizeof(ngx_open_file_cache_event_t), log); | |
| 597 if (fev == NULL) { | |
| 598 ngx_free(file->event); | |
| 599 file->event = NULL; | |
| 600 return; | |
| 601 } | |
| 602 | |
| 603 fev->fd = of->fd; | |
| 604 fev->file = file; | |
| 605 fev->cache = cache; | |
| 606 | |
| 607 file->event->handler = ngx_open_file_cache_remove; | |
| 608 file->event->data = fev; | |
| 609 | |
| 610 /* | |
| 611 * although vnode event may be called while ngx_cycle->poll | |
| 612 * destruction, however, cleanup procedures are run before any | |
| 613 * memory freeing and events will be canceled. | |
| 614 */ | |
| 615 | |
| 616 file->event->log = ngx_cycle->log; | |
| 617 | |
| 618 if (ngx_add_event(file->event, NGX_VNODE_EVENT, NGX_ONESHOT_EVENT) | |
| 619 != NGX_OK) | |
| 620 { | |
| 621 ngx_free(file->event->data); | |
| 622 ngx_free(file->event); | |
| 623 file->event = NULL; | |
| 624 return; | |
| 625 } | |
| 626 | |
| 627 /* | |
| 2071 | 628 * we do not set file->use_event here because there may be a race |
| 629 * condition: a file may be deleted between opening the file and | |
| 630 * adding event, so we rely upon event notification only after | |
| 631 * one file revalidation on next file access | |
| 1775 | 632 */ |
| 633 | |
| 634 return; | |
| 635 } | |
| 636 | |
| 637 | |
| 1453 | 638 static void |
| 639 ngx_open_file_cleanup(void *data) | |
| 640 { | |
| 641 ngx_open_file_cache_cleanup_t *c = data; | |
| 642 | |
| 643 c->file->count--; | |
| 644 | |
| 1772 | 645 ngx_close_cached_file(c->cache, c->file, c->min_uses, c->log); |
| 1453 | 646 |
| 647 /* drop one or two expired open files */ | |
| 648 ngx_expire_old_cached_files(c->cache, 1, c->log); | |
| 649 } | |
| 650 | |
| 651 | |
| 652 static void | |
| 653 ngx_close_cached_file(ngx_open_file_cache_t *cache, | |
| 1772 | 654 ngx_cached_open_file_t *file, ngx_uint_t min_uses, ngx_log_t *log) |
| 1453 | 655 { |
| 1772 | 656 ngx_log_debug5(NGX_LOG_DEBUG_CORE, log, 0, |
| 657 "close cached open file: %s, fd:%d, c:%d, u:%d, %d", | |
| 658 file->name, file->fd, file->count, file->uses, file->close); | |
| 1453 | 659 |
| 660 if (!file->close) { | |
| 661 | |
| 662 file->accessed = ngx_time(); | |
| 663 | |
| 1765 | 664 ngx_queue_remove(&file->queue); |
| 1453 | 665 |
| 1765 | 666 ngx_queue_insert_head(&cache->expire_queue, &file->queue); |
| 1453 | 667 |
| 1772 | 668 if (file->uses >= min_uses || file->count) { |
| 669 return; | |
| 670 } | |
| 1453 | 671 } |
| 672 | |
| 1775 | 673 ngx_open_file_del_event(file); |
| 1453 | 674 |
| 675 if (file->count) { | |
| 676 return; | |
| 677 } | |
| 678 | |
| 1772 | 679 if (file->fd != NGX_INVALID_FILE) { |
| 680 | |
| 681 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { | |
| 682 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, | |
| 683 ngx_close_file_n " \"%s\" failed", file->name); | |
| 684 } | |
| 685 | |
| 686 file->fd = NGX_INVALID_FILE; | |
| 687 } | |
| 688 | |
| 689 if (!file->close) { | |
| 690 return; | |
| 1453 | 691 } |
| 692 | |
| 693 ngx_free(file->name); | |
| 694 ngx_free(file); | |
| 695 } | |
| 696 | |
| 697 | |
| 698 static void | |
| 1775 | 699 ngx_open_file_del_event(ngx_cached_open_file_t *file) |
| 700 { | |
| 701 if (file->event == NULL) { | |
| 702 return; | |
| 703 } | |
| 704 | |
| 705 (void) ngx_del_event(file->event, NGX_VNODE_EVENT, | |
| 706 file->count ? NGX_FLUSH_EVENT : NGX_CLOSE_EVENT); | |
| 707 | |
| 708 ngx_free(file->event->data); | |
| 709 ngx_free(file->event); | |
| 710 file->event = NULL; | |
| 711 file->use_event = 0; | |
| 712 } | |
| 713 | |
| 714 | |
| 715 static void | |
| 1453 | 716 ngx_expire_old_cached_files(ngx_open_file_cache_t *cache, ngx_uint_t n, |
| 717 ngx_log_t *log) | |
| 718 { | |
| 719 time_t now; | |
| 1765 | 720 ngx_queue_t *q; |
| 1453 | 721 ngx_cached_open_file_t *file; |
| 722 | |
| 723 now = ngx_time(); | |
| 724 | |
| 725 /* | |
| 726 * n == 1 deletes one or two inactive files | |
| 727 * n == 0 deletes least recently used file by force | |
| 728 * and one or two inactive files | |
| 729 */ | |
| 730 | |
| 731 while (n < 3) { | |
| 732 | |
| 1765 | 733 if (ngx_queue_empty(&cache->expire_queue)) { |
| 1453 | 734 return; |
| 735 } | |
| 736 | |
| 1765 | 737 q = ngx_queue_last(&cache->expire_queue); |
| 738 | |
| 739 file = ngx_queue_data(q, ngx_cached_open_file_t, queue); | |
| 740 | |
| 1453 | 741 if (n++ != 0 && now - file->accessed <= cache->inactive) { |
| 742 return; | |
| 743 } | |
| 744 | |
| 1765 | 745 ngx_queue_remove(q); |
| 1453 | 746 |
| 747 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
| 748 | |
| 749 cache->current--; | |
| 750 | |
| 751 ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, | |
| 752 "expire cached open file: %s", file->name); | |
| 753 | |
| 754 if (!file->err && !file->is_dir) { | |
| 755 file->close = 1; | |
| 1772 | 756 ngx_close_cached_file(cache, file, 0, log); |
| 1453 | 757 |
| 758 } else { | |
| 759 ngx_free(file->name); | |
| 760 ngx_free(file); | |
| 761 } | |
| 762 } | |
| 763 } | |
| 764 | |
| 765 | |
| 766 static void | |
| 767 ngx_open_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
| 768 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) | |
| 769 { | |
| 770 ngx_rbtree_node_t **p; | |
| 771 ngx_cached_open_file_t *file, *file_temp; | |
| 772 | |
| 773 for ( ;; ) { | |
| 774 | |
| 775 if (node->key < temp->key) { | |
| 776 | |
| 777 p = &temp->left; | |
| 778 | |
| 779 } else if (node->key > temp->key) { | |
| 780 | |
| 781 p = &temp->right; | |
| 782 | |
| 783 } else { /* node->key == temp->key */ | |
| 784 | |
| 785 file = (ngx_cached_open_file_t *) node; | |
| 786 file_temp = (ngx_cached_open_file_t *) temp; | |
| 787 | |
| 788 p = (ngx_strcmp(file->name, file_temp->name) < 0) | |
| 789 ? &temp->left : &temp->right; | |
| 790 } | |
| 791 | |
| 792 if (*p == sentinel) { | |
| 793 break; | |
| 794 } | |
| 795 | |
| 796 temp = *p; | |
| 797 } | |
| 798 | |
| 799 *p = node; | |
| 800 node->parent = temp; | |
| 801 node->left = sentinel; | |
| 802 node->right = sentinel; | |
| 803 ngx_rbt_red(node); | |
| 804 } | |
| 805 | |
| 806 | |
| 1775 | 807 static ngx_cached_open_file_t * |
| 808 ngx_open_file_lookup(ngx_open_file_cache_t *cache, ngx_str_t *name, | |
| 809 uint32_t hash) | |
| 810 { | |
| 811 ngx_int_t rc; | |
| 812 ngx_rbtree_node_t *node, *sentinel; | |
| 813 ngx_cached_open_file_t *file; | |
| 814 | |
| 815 node = cache->rbtree.root; | |
| 816 sentinel = cache->rbtree.sentinel; | |
| 817 | |
| 818 while (node != sentinel) { | |
| 819 | |
| 820 if (hash < node->key) { | |
| 821 node = node->left; | |
| 822 continue; | |
| 823 } | |
| 824 | |
| 825 if (hash > node->key) { | |
| 826 node = node->right; | |
| 827 continue; | |
| 828 } | |
| 829 | |
| 830 /* hash == node->key */ | |
| 831 | |
| 832 do { | |
| 833 file = (ngx_cached_open_file_t *) node; | |
| 834 | |
| 835 rc = ngx_strcmp(name->data, file->name); | |
| 836 | |
| 837 if (rc == 0) { | |
| 838 return file; | |
| 839 } | |
| 840 | |
| 841 node = (rc < 0) ? node->left : node->right; | |
| 842 | |
| 843 } while (node != sentinel && hash == node->key); | |
| 844 | |
| 845 break; | |
| 846 } | |
| 847 | |
| 848 return NULL; | |
| 849 } | |
| 850 | |
| 851 | |
| 1453 | 852 static void |
| 853 ngx_open_file_cache_remove(ngx_event_t *ev) | |
| 854 { | |
| 855 ngx_cached_open_file_t *file; | |
| 856 ngx_open_file_cache_event_t *fev; | |
| 857 | |
| 858 fev = ev->data; | |
| 859 file = fev->file; | |
| 860 | |
| 1765 | 861 ngx_queue_remove(&file->queue); |
| 1453 | 862 |
| 863 ngx_rbtree_delete(&fev->cache->rbtree, &file->node); | |
| 864 | |
| 865 fev->cache->current--; | |
| 866 | |
| 867 /* NGX_ONESHOT_EVENT was already deleted */ | |
| 868 file->event = NULL; | |
| 2070 | 869 file->use_event = 0; |
| 1453 | 870 |
| 871 file->close = 1; | |
| 872 | |
| 1772 | 873 ngx_close_cached_file(fev->cache, file, 0, ev->log); |
| 1453 | 874 |
| 875 /* free memory only when fev->cache and fev->file are already not needed */ | |
| 876 | |
| 877 ngx_free(ev->data); | |
| 878 ngx_free(ev); | |
| 879 } |