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, |
|
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changeset
|
51 ngx_open_file_cache_rbtree_insert_value); |
| 1453 | 52 |
| 1765 | 53 ngx_queue_init(&cache->expire_queue); |
| 54 | |
| 1453 | 55 cache->current = 0; |
| 56 cache->max = max; | |
| 57 cache->inactive = inactive; | |
| 58 | |
| 59 cln = ngx_pool_cleanup_add(pool, 0); | |
| 60 if (cln == NULL) { | |
| 61 return NULL; | |
| 62 } | |
| 63 | |
| 64 cln->handler = ngx_open_file_cache_cleanup; | |
| 65 cln->data = cache; | |
| 66 | |
| 67 return cache; | |
| 68 } | |
| 69 | |
| 70 | |
| 71 static void | |
| 72 ngx_open_file_cache_cleanup(void *data) | |
| 73 { | |
| 74 ngx_open_file_cache_t *cache = data; | |
| 75 | |
| 1765 | 76 ngx_queue_t *q; |
| 1453 | 77 ngx_cached_open_file_t *file; |
| 78 | |
| 79 ngx_log_debug0(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0, | |
| 80 "open file cache cleanup"); | |
| 81 | |
| 82 for ( ;; ) { | |
| 83 | |
| 1765 | 84 if (ngx_queue_empty(&cache->expire_queue)) { |
| 1766 | 85 break; |
| 1453 | 86 } |
| 87 | |
| 1765 | 88 q = ngx_queue_last(&cache->expire_queue); |
| 89 | |
| 90 file = ngx_queue_data(q, ngx_cached_open_file_t, queue); | |
| 91 | |
| 92 ngx_queue_remove(q); | |
| 1453 | 93 |
| 94 ngx_rbtree_delete(&cache->rbtree, &file->node); | |
| 95 | |
| 96 cache->current--; | |
| 97 | |
| 98 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ngx_cycle->log, 0, | |
| 99 "delete cached open file: %s", file->name); | |
| 100 | |
| 101 if (!file->err && !file->is_dir) { | |
| 102 file->close = 1; | |
| 103 file->count = 0; | |
| 1772 | 104 ngx_close_cached_file(cache, file, 0, ngx_cycle->log); |
| 1453 | 105 |
| 106 } else { | |
| 107 ngx_free(file->name); | |
| 108 ngx_free(file); | |
| 109 } | |
| 110 } | |
| 111 | |
| 112 if (cache->current) { | |
| 113 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, | |
| 114 "%d items still leave in open file cache", | |
| 115 cache->current); | |
| 116 } | |
| 117 | |
| 118 if (cache->rbtree.root != cache->rbtree.sentinel) { | |
| 119 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, | |
| 120 "rbtree still is not empty in open file cache"); | |
| 121 | |
| 122 } | |
| 123 } | |
| 124 | |
| 125 | |
| 126 ngx_int_t | |
| 127 ngx_open_cached_file(ngx_open_file_cache_t *cache, ngx_str_t *name, | |
| 128 ngx_open_file_info_t *of, ngx_pool_t *pool) | |
| 129 { | |
| 130 time_t now; | |
| 131 uint32_t hash; | |
| 132 ngx_int_t rc; | |
| 133 ngx_pool_cleanup_t *cln; | |
| 134 ngx_cached_open_file_t *file; | |
| 135 ngx_pool_cleanup_file_t *clnf; | |
| 136 ngx_open_file_cache_cleanup_t *ofcln; | |
| 137 | |
|
2069
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Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
138 of->fd = NGX_INVALID_FILE; |
| 1453 | 139 of->err = 0; |
| 140 | |
| 141 if (cache == NULL) { | |
| 142 | |
| 143 cln = ngx_pool_cleanup_add(pool, sizeof(ngx_pool_cleanup_file_t)); | |
| 144 if (cln == NULL) { | |
| 145 return NGX_ERROR; | |
| 146 } | |
| 147 | |
| 148 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
| 149 | |
| 150 if (rc == NGX_OK && !of->is_dir) { | |
| 151 cln->handler = ngx_pool_cleanup_file; | |
| 152 clnf = cln->data; | |
| 153 | |
| 154 clnf->fd = of->fd; | |
| 155 clnf->name = name->data; | |
| 156 clnf->log = pool->log; | |
| 157 } | |
| 158 | |
| 159 return rc; | |
| 160 } | |
| 161 | |
| 162 cln = ngx_pool_cleanup_add(pool, sizeof(ngx_open_file_cache_cleanup_t)); | |
| 163 if (cln == NULL) { | |
| 164 return NGX_ERROR; | |
| 165 } | |
| 166 | |
| 167 now = ngx_time(); | |
| 168 | |
| 1775 | 169 hash = ngx_crc32_long(name->data, name->len); |
| 170 | |
| 171 file = ngx_open_file_lookup(cache, name, hash); | |
| 172 | |
| 173 if (file) { | |
| 174 | |
| 175 file->uses++; | |
| 176 | |
| 1987 | 177 ngx_queue_remove(&file->queue); |
| 178 | |
| 1775 | 179 if (file->fd == NGX_INVALID_FILE && file->err == 0 && !file->is_dir) { |
| 180 | |
| 181 /* file was not used often enough to keep open */ | |
| 182 | |
| 183 rc = ngx_open_and_stat_file(name->data, of, pool->log); | |
| 1453 | 184 |
| 1775 | 185 if (rc != NGX_OK && (of->err == 0 || !of->errors)) { |
| 186 goto failed; | |
| 187 } | |
| 188 | |
| 189 goto add_event; | |
| 1453 | 190 } |
| 191 | |
| 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
|
194 && (of->uniq == 0 || of->uniq == file->uniq) |
|
67a29af877ed
initialize of.uniq in ngx_open_cached_file()
Igor Sysoev <igor@sysoev.ru>
parents:
2006
diff
changeset
|
195 && now - file->created < of->valid)) |
| 1775 | 196 { |
| 197 if (file->err == 0) { | |
| 1772 | 198 |
| 1775 | 199 of->fd = file->fd; |
| 200 of->uniq = file->uniq; | |
| 201 of->mtime = file->mtime; | |
| 202 of->size = file->size; | |
| 1453 | 203 |
| 1775 | 204 of->is_dir = file->is_dir; |
| 205 of->is_file = file->is_file; | |
| 206 of->is_link = file->is_link; | |
| 207 of->is_exec = file->is_exec; | |
|
2246
987831d73bd8
cache directio flag in open file cache
Igor Sysoev <igor@sysoev.ru>
parents:
2231
diff
changeset
|
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
23930ccd2642
use ngx_file_info() and test uniq if file is already open
Igor Sysoev <igor@sysoev.ru>
parents:
2063
diff
changeset
|
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
|
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
|
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) { | |
|
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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 | |
|
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487 of->fd = NGX_INVALID_FILE; |
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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 | |
|
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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)) { | |
|
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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 | |
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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 } |