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164f7660 | 1 | |
30a4f2a8 | 2 | /* |
262a0e14 | 3 | * $Id$ |
30a4f2a8 | 4 | * |
8638fc66 | 5 | * DEBUG: section 20 Storage Manager |
30a4f2a8 | 6 | * AUTHOR: Harvest Derived |
7 | * | |
2b6662ba | 8 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
e25c139f | 9 | * ---------------------------------------------------------- |
30a4f2a8 | 10 | * |
2b6662ba | 11 | * Squid is the result of efforts by numerous individuals from |
12 | * the Internet community; see the CONTRIBUTORS file for full | |
13 | * details. Many organizations have provided support for Squid's | |
14 | * development; see the SPONSORS file for full details. Squid is | |
15 | * Copyrighted (C) 2001 by the Regents of the University of | |
16 | * California; see the COPYRIGHT file for full details. Squid | |
17 | * incorporates software developed and/or copyrighted by other | |
18 | * sources; see the CREDITS file for full details. | |
30a4f2a8 | 19 | * |
20 | * This program is free software; you can redistribute it and/or modify | |
21 | * it under the terms of the GNU General Public License as published by | |
22 | * the Free Software Foundation; either version 2 of the License, or | |
23 | * (at your option) any later version. | |
26ac0430 | 24 | * |
30a4f2a8 | 25 | * This program is distributed in the hope that it will be useful, |
26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
28 | * GNU General Public License for more details. | |
26ac0430 | 29 | * |
30a4f2a8 | 30 | * You should have received a copy of the GNU General Public License |
31 | * along with this program; if not, write to the Free Software | |
cbdec147 | 32 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
e25c139f | 33 | * |
c943f331 | 34 | */ |
090089c4 | 35 | |
f09f5b26 | 36 | #include "squid.h" |
a553a5a3 | 37 | #include "event.h" |
04f55905 | 38 | #include "fde.h" |
e6ccf245 | 39 | #include "Store.h" |
62ee09ca | 40 | #include "CacheManager.h" |
e6ccf245 | 41 | #include "StoreClient.h" |
528b2c61 | 42 | #include "stmem.h" |
43 | #include "HttpReply.h" | |
44 | #include "HttpRequest.h" | |
45 | #include "MemObject.h" | |
46 | #include "mem_node.h" | |
47 | #include "StoreMeta.h" | |
d3b3ab85 | 48 | #include "SwapDir.h" |
b67e2c8c | 49 | #if DELAY_POOLS |
50 | #include "DelayPools.h" | |
51 | #endif | |
91caca83 | 52 | #include "Stack.h" |
985c86bc | 53 | #include "SquidTime.h" |
4b981814 | 54 | #include "swap_log_op.h" |
090089c4 | 55 | |
528b2c61 | 56 | static STMCB storeWriteComplete; |
57 | ||
090089c4 | 58 | #define REBUILD_TIMESTAMP_DELTA_MAX 2 |
227fbb74 | 59 | |
c21ad0f5 | 60 | #define STORE_IN_MEM_BUCKETS (229) |
090089c4 | 61 | |
4b981814 AJ |
62 | |
63 | /** \todo Convert these string constants to enum string-arrays generated */ | |
64 | ||
26ac0430 AJ |
65 | const char *memStatusStr[] = { |
66 | "NOT_IN_MEMORY", | |
67 | "IN_MEMORY" | |
68 | }; | |
69 | ||
70 | const char *pingStatusStr[] = { | |
71 | "PING_NONE", | |
72 | "PING_WAITING", | |
73 | "PING_DONE" | |
74 | }; | |
75 | ||
76 | const char *storeStatusStr[] = { | |
77 | "STORE_OK", | |
78 | "STORE_PENDING" | |
79 | }; | |
80 | ||
81 | const char *swapStatusStr[] = { | |
82 | "SWAPOUT_NONE", | |
83 | "SWAPOUT_WRITING", | |
84 | "SWAPOUT_DONE" | |
85 | }; | |
9dfb6c1c | 86 | |
65a53c8e | 87 | extern OBJH storeIOStats; |
88 | ||
25b6a907 | 89 | |
90 | /* | |
91 | * This defines an repl type | |
92 | */ | |
93 | ||
94 | typedef struct _storerepl_entry storerepl_entry_t; | |
95 | ||
26ac0430 | 96 | struct _storerepl_entry { |
25b6a907 | 97 | const char *typestr; |
98 | REMOVALPOLICYCREATE *create; | |
99 | }; | |
100 | ||
101 | static storerepl_entry_t *storerepl_list = NULL; | |
102 | ||
103 | ||
e3ef2b09 | 104 | /* |
105 | * local function prototypes | |
106 | */ | |
007b8be4 | 107 | static int getKeyCounter(void); |
8423ff74 | 108 | static OBJH storeCheckCachableStats; |
e42d5181 | 109 | static EVH storeLateRelease; |
a21fbb54 | 110 | |
e3ef2b09 | 111 | /* |
112 | * local variables | |
113 | */ | |
91caca83 | 114 | static Stack<StoreEntry*> LateReleaseStack; |
04eb0689 | 115 | MemAllocator *StoreEntry::pool = NULL; |
e6ccf245 | 116 | |
c8f4eac4 | 117 | StorePointer Store::CurrentRoot = NULL; |
118 | ||
119 | void | |
120 | Store::Root(Store * aRoot) | |
121 | { | |
122 | CurrentRoot = aRoot; | |
123 | } | |
124 | ||
125 | void | |
126 | Store::Root(StorePointer aRoot) | |
127 | { | |
128 | Root(aRoot.getRaw()); | |
129 | } | |
130 | ||
131 | void | |
132 | Store::Stats(StoreEntry * output) | |
133 | { | |
134 | assert (output); | |
135 | Root().stat(*output); | |
136 | } | |
137 | ||
138 | void | |
139 | Store::create() | |
140 | {} | |
141 | ||
142 | void | |
143 | Store::diskFull() | |
144 | {} | |
145 | ||
146 | void | |
147 | Store::sync() | |
148 | {} | |
149 | ||
150 | void | |
151 | Store::unlink (StoreEntry &anEntry) | |
152 | { | |
153 | fatal("Store::unlink on invalid Store\n"); | |
154 | } | |
155 | ||
e6ccf245 | 156 | void * |
3b13a8fd | 157 | StoreEntry::operator new (size_t bytecount) |
e6ccf245 | 158 | { |
3b13a8fd | 159 | assert (bytecount == sizeof (StoreEntry)); |
62e76326 | 160 | |
e6ccf245 | 161 | if (!pool) { |
04eb0689 | 162 | pool = memPoolCreate ("StoreEntry", bytecount); |
b001e822 | 163 | pool->setChunkSize(2048 * 1024); |
e6ccf245 | 164 | } |
62e76326 | 165 | |
b001e822 | 166 | return pool->alloc(); |
e6ccf245 | 167 | } |
168 | ||
169 | void | |
3b13a8fd | 170 | StoreEntry::operator delete (void *address) |
e6ccf245 | 171 | { |
b001e822 | 172 | pool->free(address); |
e6ccf245 | 173 | } |
174 | ||
5ed72359 | 175 | void |
176 | StoreEntry::makePublic() | |
177 | { | |
178 | /* This object can be cached for a long time */ | |
179 | ||
180 | if (EBIT_TEST(flags, ENTRY_CACHABLE)) | |
d88e3c49 | 181 | setPublicKey(); |
5ed72359 | 182 | } |
183 | ||
184 | void | |
185 | StoreEntry::makePrivate() | |
186 | { | |
187 | /* This object should never be cached at all */ | |
d88e3c49 | 188 | expireNow(); |
189 | releaseRequest(); /* delete object when not used */ | |
190 | /* releaseRequest clears ENTRY_CACHABLE flag */ | |
5ed72359 | 191 | } |
192 | ||
193 | void | |
194 | StoreEntry::cacheNegatively() | |
195 | { | |
196 | /* This object may be negatively cached */ | |
d88e3c49 | 197 | negativeCache(); |
5ed72359 | 198 | |
199 | if (EBIT_TEST(flags, ENTRY_CACHABLE)) | |
d88e3c49 | 200 | setPublicKey(); |
5ed72359 | 201 | } |
202 | ||
e6ccf245 | 203 | size_t |
3b13a8fd | 204 | StoreEntry::inUseCount() |
e6ccf245 | 205 | { |
206 | if (!pool) | |
62e76326 | 207 | return 0; |
9f9e06f3 | 208 | return pool->getInUseCount(); |
e6ccf245 | 209 | } |
210 | ||
332dafa2 | 211 | const char * |
3b13a8fd | 212 | StoreEntry::getMD5Text() const |
332dafa2 | 213 | { |
214 | return storeKeyText((const cache_key *)key); | |
215 | } | |
216 | ||
a46d2c0e | 217 | #include "comm.h" |
218 | ||
219 | void | |
220 | StoreEntry::DeferReader(void *theContext, CommRead const &aRead) | |
e6ccf245 | 221 | { |
a46d2c0e | 222 | StoreEntry *anEntry = (StoreEntry *)theContext; |
223 | anEntry->delayAwareRead(aRead.fd, | |
224 | aRead.buf, | |
225 | aRead.len, | |
65517dc8 | 226 | aRead.callback); |
e6ccf245 | 227 | } |
66cedb85 | 228 | |
a46d2c0e | 229 | void |
65517dc8 | 230 | StoreEntry::delayAwareRead(int fd, char *buf, int len, AsyncCall::Pointer callback) |
a46d2c0e | 231 | { |
232 | size_t amountToRead = bytesWanted(Range<size_t>(0, len)); | |
233 | /* sketch: readdeferer* = getdeferer. | |
65517dc8 | 234 | * ->deferRead (fd, buf, len, callback, DelayAwareRead, this) |
a46d2c0e | 235 | */ |
236 | ||
237 | if (amountToRead == 0) { | |
238 | assert (mem_obj); | |
239 | /* read ahead limit */ | |
240 | /* Perhaps these two calls should both live in MemObject */ | |
a5f42284 | 241 | #if DELAY_POOLS |
a46d2c0e | 242 | |
243 | if (!mem_obj->readAheadPolicyCanRead()) { | |
a5f42284 | 244 | #endif |
65517dc8 | 245 | mem_obj->delayRead(DeferredRead(DeferReader, this, CommRead(fd, buf, len, callback))); |
a46d2c0e | 246 | return; |
a5f42284 | 247 | #if DELAY_POOLS |
248 | ||
a46d2c0e | 249 | } |
250 | ||
251 | /* delay id limit */ | |
65517dc8 | 252 | mem_obj->mostBytesAllowed().delayRead(DeferredRead(DeferReader, this, CommRead(fd, buf, len, callback))); |
a46d2c0e | 253 | |
254 | return; | |
a5f42284 | 255 | |
256 | #endif | |
257 | ||
a46d2c0e | 258 | } |
259 | ||
65517dc8 | 260 | comm_read(fd, buf, amountToRead, callback); |
a46d2c0e | 261 | } |
262 | ||
263 | size_t | |
264 | StoreEntry::bytesWanted (Range<size_t> const aRange) const | |
528b2c61 | 265 | { |
a46d2c0e | 266 | assert (aRange.size()); |
62e76326 | 267 | |
528b2c61 | 268 | if (mem_obj == NULL) |
a46d2c0e | 269 | return aRange.end - 1; |
62e76326 | 270 | |
bc87dc25 | 271 | #if URL_CHECKSUM_DEBUG |
62e76326 | 272 | |
528b2c61 | 273 | mem_obj->checkUrlChecksum(); |
62e76326 | 274 | |
528b2c61 | 275 | #endif |
62e76326 | 276 | |
a46d2c0e | 277 | /* Always read *something* here - we haven't got the header yet */ |
278 | if (EBIT_TEST(flags, ENTRY_FWD_HDR_WAIT)) | |
279 | return aRange.end - 1; | |
62e76326 | 280 | |
a46d2c0e | 281 | if (!mem_obj->readAheadPolicyCanRead()) |
282 | return 0; | |
62e76326 | 283 | |
a46d2c0e | 284 | return mem_obj->mostBytesWanted(aRange.end - 1); |
285 | } | |
62e76326 | 286 | |
a46d2c0e | 287 | bool |
288 | StoreEntry::checkDeferRead(int fd) const | |
289 | { | |
290 | return (bytesWanted(Range<size_t>(0,INT_MAX)) == 0); | |
291 | } | |
62e76326 | 292 | |
a46d2c0e | 293 | void |
294 | StoreEntry::setNoDelay (bool const newValue) | |
295 | { | |
296 | if (mem_obj) | |
297 | mem_obj->setNoDelay(newValue); | |
528b2c61 | 298 | } |
bc87dc25 | 299 | |
528b2c61 | 300 | store_client_t |
301 | StoreEntry::storeClientType() const | |
227fbb74 | 302 | { |
7d31d5fa | 303 | /* The needed offset isn't in memory |
304 | * XXX TODO: this is wrong for range requests | |
305 | * as the needed offset may *not* be 0, AND | |
306 | * offset 0 in the memory object is the HTTP headers. | |
307 | */ | |
308 | ||
528b2c61 | 309 | if (mem_obj->inmem_lo) |
62e76326 | 310 | return STORE_DISK_CLIENT; |
311 | ||
528b2c61 | 312 | if (EBIT_TEST(flags, ENTRY_ABORTED)) { |
62e76326 | 313 | /* I don't think we should be adding clients to aborted entries */ |
bf8fe701 | 314 | debugs(20, 1, "storeClientType: adding to ENTRY_ABORTED entry"); |
62e76326 | 315 | return STORE_MEM_CLIENT; |
528b2c61 | 316 | } |
62e76326 | 317 | |
528b2c61 | 318 | if (store_status == STORE_OK) { |
7d31d5fa | 319 | /* the object has completed. */ |
320 | ||
344a9006 | 321 | if (mem_obj->inmem_lo == 0 && !isEmpty()) { |
47ce0a58 | 322 | if (swap_status == SWAPOUT_DONE) { |
e1381638 AJ |
323 | if (mem_obj->endOffset() == mem_obj->object_sz) { |
324 | /* hot object fully swapped in */ | |
325 | return STORE_MEM_CLIENT; | |
326 | } | |
47ce0a58 | 327 | } else { |
e1381638 AJ |
328 | /* Memory-only, or currently being swapped out */ |
329 | return STORE_MEM_CLIENT; | |
47ce0a58 HN |
330 | } |
331 | } | |
332 | return STORE_DISK_CLIENT; | |
528b2c61 | 333 | } |
62e76326 | 334 | |
528b2c61 | 335 | /* here and past, entry is STORE_PENDING */ |
336 | /* | |
337 | * If this is the first client, let it be the mem client | |
338 | */ | |
339 | if (mem_obj->nclients == 1) | |
62e76326 | 340 | return STORE_MEM_CLIENT; |
341 | ||
528b2c61 | 342 | /* |
343 | * If there is no disk file to open yet, we must make this a | |
344 | * mem client. If we can't open the swapin file before writing | |
345 | * to the client, there is no guarantee that we will be able | |
346 | * to open it later when we really need it. | |
347 | */ | |
348 | if (swap_status == SWAPOUT_NONE) | |
62e76326 | 349 | return STORE_MEM_CLIENT; |
350 | ||
528b2c61 | 351 | /* |
352 | * otherwise, make subsequent clients read from disk so they | |
353 | * can not delay the first, and vice-versa. | |
354 | */ | |
355 | return STORE_DISK_CLIENT; | |
227fbb74 | 356 | } |
357 | ||
c8f4eac4 | 358 | StoreEntry::StoreEntry() |
090089c4 | 359 | { |
59dbbc5c | 360 | debugs(20, 3, HERE << "new StoreEntry " << this); |
c8f4eac4 | 361 | mem_obj = NULL; |
62e76326 | 362 | |
c8f4eac4 | 363 | expires = lastmod = lastref = timestamp = -1; |
62e76326 | 364 | |
c8f4eac4 | 365 | swap_filen = -1; |
366 | swap_dirn = -1; | |
367 | } | |
62e76326 | 368 | |
d5f8d05f | 369 | StoreEntry::StoreEntry(const char *aUrl, const char *aLogUrl) |
c8f4eac4 | 370 | { |
59dbbc5c | 371 | debugs(20, 3, HERE << "new StoreEntry " << this); |
d5f8d05f | 372 | mem_obj = new MemObject(aUrl, aLogUrl); |
62e76326 | 373 | |
c8f4eac4 | 374 | expires = lastmod = lastref = timestamp = -1; |
375 | ||
376 | swap_filen = -1; | |
377 | swap_dirn = -1; | |
090089c4 | 378 | } |
379 | ||
3900307b | 380 | void |
381 | StoreEntry::destroyMemObject() | |
090089c4 | 382 | { |
3900307b | 383 | debugs(20, 3, HERE << "destroyMemObject " << mem_obj); |
384 | setMemStatus(NOT_IN_MEMORY); | |
385 | MemObject *mem = mem_obj; | |
386 | mem_obj = NULL; | |
528b2c61 | 387 | delete mem; |
090089c4 | 388 | } |
389 | ||
c8f4eac4 | 390 | void |
528b2c61 | 391 | destroyStoreEntry(void *data) |
090089c4 | 392 | { |
59dbbc5c | 393 | debugs(20, 3, HERE << "destroyStoreEntry: destroying " << data); |
c8f4eac4 | 394 | StoreEntry *e = static_cast<StoreEntry *>(static_cast<hash_link *>(data)); |
9e975e4e | 395 | assert(e != NULL); |
62e76326 | 396 | |
e6ccf245 | 397 | if (e == NullStoreEntry::getInstance()) |
62e76326 | 398 | return; |
399 | ||
3900307b | 400 | e->destroyMemObject(); |
62e76326 | 401 | |
3900307b | 402 | e->hashDelete(); |
62e76326 | 403 | |
332dafa2 | 404 | assert(e->key == NULL); |
62e76326 | 405 | |
e6ccf245 | 406 | delete e; |
227fbb74 | 407 | } |
090089c4 | 408 | |
090089c4 | 409 | /* ----- INTERFACE BETWEEN STORAGE MANAGER AND HASH TABLE FUNCTIONS --------- */ |
410 | ||
f09f5b26 | 411 | void |
3900307b | 412 | StoreEntry::hashInsert(const cache_key * someKey) |
090089c4 | 413 | { |
bf8fe701 | 414 | debugs(20, 3, "StoreEntry::hashInsert: Inserting Entry " << this << " key '" << storeKeyText(someKey) << "'"); |
3900307b | 415 | key = storeKeyDup(someKey); |
416 | hash_join(store_table, this); | |
090089c4 | 417 | } |
418 | ||
3900307b | 419 | void |
420 | StoreEntry::hashDelete() | |
090089c4 | 421 | { |
3900307b | 422 | hash_remove_link(store_table, this); |
423 | storeKeyFree((const cache_key *)key); | |
424 | key = NULL; | |
090089c4 | 425 | } |
426 | ||
090089c4 | 427 | /* -------------------------------------------------------------------------- */ |
428 | ||
090089c4 | 429 | |
430 | /* get rid of memory copy of the object */ | |
d88e3c49 | 431 | void |
432 | StoreEntry::purgeMem() | |
090089c4 | 433 | { |
d88e3c49 | 434 | if (mem_obj == NULL) |
62e76326 | 435 | return; |
436 | ||
bf8fe701 | 437 | debugs(20, 3, "StoreEntry::purgeMem: Freeing memory-copy of " << getMD5Text()); |
62e76326 | 438 | |
3900307b | 439 | destroyMemObject(); |
62e76326 | 440 | |
d88e3c49 | 441 | if (swap_status != SWAPOUT_DONE) |
442 | release(); | |
090089c4 | 443 | } |
444 | ||
c8f4eac4 | 445 | /* RBC 20050104 this is wrong- memory ref counting |
446 | * is not at all equivalent to the store 'usage' concept | |
447 | * which the replacement policies should be acting upon. | |
448 | * specifically, object iteration within stores needs | |
449 | * memory ref counting to prevent race conditions, | |
450 | * but this should not influence store replacement. | |
451 | */ | |
6a566b9c | 452 | void |
c21ad0f5 | 453 | |
454 | StoreEntry::lock() | |
6a566b9c | 455 | { |
c21ad0f5 | 456 | lock_count++; |
34266cde | 457 | debugs(20, 3, "StoreEntry::lock: key '" << getMD5Text() <<"' count=" << |
bf8fe701 | 458 | lock_count ); |
c21ad0f5 | 459 | lastref = squid_curtime; |
460 | Store::Root().reference(*this); | |
090089c4 | 461 | } |
462 | ||
43ae1d95 | 463 | void |
464 | StoreEntry::setReleaseFlag() | |
465 | { | |
466 | if (EBIT_TEST(flags, RELEASE_REQUEST)) | |
467 | return; | |
468 | ||
bf8fe701 | 469 | debugs(20, 3, "StoreEntry::setReleaseFlag: '" << getMD5Text() << "'"); |
43ae1d95 | 470 | |
471 | EBIT_SET(flags, RELEASE_REQUEST); | |
472 | } | |
473 | ||
b8d8561b | 474 | void |
d88e3c49 | 475 | StoreEntry::releaseRequest() |
2285407f | 476 | { |
d88e3c49 | 477 | if (EBIT_TEST(flags, RELEASE_REQUEST)) |
62e76326 | 478 | return; |
479 | ||
d88e3c49 | 480 | setReleaseFlag(); |
62e76326 | 481 | |
f3e570e9 | 482 | /* |
483 | * Clear cachable flag here because we might get called before | |
484 | * anyone else even looks at the cachability flag. Also, this | |
485 | * prevents httpMakePublic from really setting a public key. | |
486 | */ | |
d88e3c49 | 487 | EBIT_CLR(flags, ENTRY_CACHABLE); |
62e76326 | 488 | |
d88e3c49 | 489 | setPrivateKey(); |
2285407f | 490 | } |
491 | ||
090089c4 | 492 | /* unlock object, return -1 if object get released after unlock |
493 | * otherwise lock_count */ | |
b8d8561b | 494 | int |
c21ad0f5 | 495 | StoreEntry::unlock() |
090089c4 | 496 | { |
c21ad0f5 | 497 | lock_count--; |
bf8fe701 | 498 | debugs(20, 3, "StoreEntry::unlock: key '" << getMD5Text() << "' count=" << lock_count); |
62e76326 | 499 | |
c21ad0f5 | 500 | if (lock_count) |
501 | return (int) lock_count; | |
62e76326 | 502 | |
c21ad0f5 | 503 | if (store_status == STORE_PENDING) |
504 | setReleaseFlag(); | |
62e76326 | 505 | |
c21ad0f5 | 506 | assert(storePendingNClients(this) == 0); |
62e76326 | 507 | |
c21ad0f5 | 508 | if (EBIT_TEST(flags, RELEASE_REQUEST)) |
5f33b71d | 509 | this->release(); |
3900307b | 510 | else if (keepInMemory()) { |
c21ad0f5 | 511 | Store::Root().dereference(*this); |
3900307b | 512 | setMemStatus(IN_MEMORY); |
c21ad0f5 | 513 | mem_obj->unlinkRequest(); |
66f07209 | 514 | } else { |
c21ad0f5 | 515 | Store::Root().dereference(*this); |
62e76326 | 516 | |
c21ad0f5 | 517 | if (EBIT_TEST(flags, KEY_PRIVATE)) |
bf8fe701 | 518 | debugs(20, 1, "WARNING: " << __FILE__ << ":" << __LINE__ << ": found KEY_PRIVATE"); |
42fc2858 | 519 | |
d88e3c49 | 520 | /* StoreEntry::purgeMem may free e */ |
521 | purgeMem(); | |
66f07209 | 522 | } |
62e76326 | 523 | |
6c895381 | 524 | return 0; |
090089c4 | 525 | } |
526 | ||
e6ccf245 | 527 | void |
60745f24 | 528 | StoreEntry::getPublicByRequestMethod (StoreClient *aClient, HttpRequest * request, const HttpRequestMethod& method) |
e6ccf245 | 529 | { |
530 | assert (aClient); | |
3b13a8fd | 531 | StoreEntry *result = storeGetPublicByRequestMethod( request, method); |
62e76326 | 532 | |
e6ccf245 | 533 | if (!result) |
62e76326 | 534 | aClient->created (NullStoreEntry::getInstance()); |
e6ccf245 | 535 | else |
62e76326 | 536 | aClient->created (result); |
e6ccf245 | 537 | } |
538 | ||
539 | void | |
190154cf | 540 | StoreEntry::getPublicByRequest (StoreClient *aClient, HttpRequest * request) |
e6ccf245 | 541 | { |
542 | assert (aClient); | |
3b13a8fd | 543 | StoreEntry *result = storeGetPublicByRequest (request); |
62e76326 | 544 | |
e6ccf245 | 545 | if (!result) |
62e76326 | 546 | result = NullStoreEntry::getInstance(); |
547 | ||
e6ccf245 | 548 | aClient->created (result); |
549 | } | |
550 | ||
551 | void | |
60745f24 | 552 | StoreEntry::getPublic (StoreClient *aClient, const char *uri, const HttpRequestMethod& method) |
e6ccf245 | 553 | { |
554 | assert (aClient); | |
3b13a8fd | 555 | StoreEntry *result = storeGetPublic (uri, method); |
62e76326 | 556 | |
e6ccf245 | 557 | if (!result) |
62e76326 | 558 | result = NullStoreEntry::getInstance(); |
559 | ||
e6ccf245 | 560 | aClient->created (result); |
561 | } | |
562 | ||
08e5d64f | 563 | StoreEntry * |
60745f24 | 564 | storeGetPublic(const char *uri, const HttpRequestMethod& method) |
08e5d64f | 565 | { |
c8f4eac4 | 566 | return Store::Root().get(storeKeyPublic(uri, method)); |
08e5d64f | 567 | } |
568 | ||
f66a9ef4 | 569 | StoreEntry * |
60745f24 | 570 | storeGetPublicByRequestMethod(HttpRequest * req, const HttpRequestMethod& method) |
f66a9ef4 | 571 | { |
c8f4eac4 | 572 | return Store::Root().get(storeKeyPublicByRequestMethod(req, method)); |
f66a9ef4 | 573 | } |
574 | ||
575 | StoreEntry * | |
190154cf | 576 | storeGetPublicByRequest(HttpRequest * req) |
f66a9ef4 | 577 | { |
578 | StoreEntry *e = storeGetPublicByRequestMethod(req, req->method); | |
62e76326 | 579 | |
f66a9ef4 | 580 | if (e == NULL && req->method == METHOD_HEAD) |
62e76326 | 581 | /* We can generate a HEAD reply from a cached GET object */ |
582 | e = storeGetPublicByRequestMethod(req, METHOD_GET); | |
583 | ||
f66a9ef4 | 584 | return e; |
585 | } | |
586 | ||
007b8be4 | 587 | static int |
588 | getKeyCounter(void) | |
04e8dbaa | 589 | { |
007b8be4 | 590 | static int key_counter = 0; |
62e76326 | 591 | |
007b8be4 | 592 | if (++key_counter < 0) |
62e76326 | 593 | key_counter = 1; |
594 | ||
007b8be4 | 595 | return key_counter; |
04e8dbaa | 596 | } |
597 | ||
c8f4eac4 | 598 | /* RBC 20050104 AFAICT this should become simpler: |
599 | * rather than reinserting with a special key it should be marked | |
600 | * as 'released' and then cleaned up when refcounting indicates. | |
601 | * the StoreHashIndex could well implement its 'released' in the | |
602 | * current manner. | |
603 | * Also, clean log writing should skip over ia,t | |
604 | * Otherwise, we need a 'remove from the index but not the store | |
605 | * concept'. | |
606 | */ | |
6c57e268 | 607 | void |
d88e3c49 | 608 | StoreEntry::setPrivateKey() |
227fbb74 | 609 | { |
9fb13bb6 | 610 | const cache_key *newkey; |
62e76326 | 611 | |
d88e3c49 | 612 | if (key && EBIT_TEST(flags, KEY_PRIVATE)) |
c21ad0f5 | 613 | return; /* is already private */ |
62e76326 | 614 | |
d88e3c49 | 615 | if (key) { |
616 | if (swap_filen > -1) | |
617 | storeDirSwapLog(this, SWAP_LOG_DEL); | |
62e76326 | 618 | |
3900307b | 619 | hashDelete(); |
b109de6b | 620 | } |
62e76326 | 621 | |
d88e3c49 | 622 | if (mem_obj != NULL) { |
623 | mem_obj->id = getKeyCounter(); | |
624 | newkey = storeKeyPrivate(mem_obj->url, mem_obj->method, mem_obj->id); | |
9fb13bb6 | 625 | } else { |
62e76326 | 626 | newkey = storeKeyPrivate("JUNK", METHOD_NONE, getKeyCounter()); |
9fb13bb6 | 627 | } |
62e76326 | 628 | |
9fb13bb6 | 629 | assert(hash_lookup(store_table, newkey) == NULL); |
d88e3c49 | 630 | EBIT_SET(flags, KEY_PRIVATE); |
3900307b | 631 | hashInsert(newkey); |
227fbb74 | 632 | } |
633 | ||
b8d8561b | 634 | void |
d88e3c49 | 635 | StoreEntry::setPublicKey() |
227fbb74 | 636 | { |
6eb42cae | 637 | StoreEntry *e2 = NULL; |
9fb13bb6 | 638 | const cache_key *newkey; |
62e76326 | 639 | |
d88e3c49 | 640 | if (key && !EBIT_TEST(flags, KEY_PRIVATE)) |
c21ad0f5 | 641 | return; /* is already public */ |
62e76326 | 642 | |
d88e3c49 | 643 | assert(mem_obj); |
62e76326 | 644 | |
f3e570e9 | 645 | /* |
646 | * We can't make RELEASE_REQUEST objects public. Depending on | |
647 | * when RELEASE_REQUEST gets set, we might not be swapping out | |
648 | * the object. If we're not swapping out, then subsequent | |
649 | * store clients won't be able to access object data which has | |
650 | * been freed from memory. | |
d87ebd78 | 651 | * |
652 | * If RELEASE_REQUEST is set, then ENTRY_CACHABLE should not | |
d88e3c49 | 653 | * be set, and StoreEntry::setPublicKey() should not be called. |
f3e570e9 | 654 | */ |
6a566b9c | 655 | #if MORE_DEBUG_OUTPUT |
62e76326 | 656 | |
d88e3c49 | 657 | if (EBIT_TEST(flags, RELEASE_REQUEST)) |
308652fc | 658 | debugs(20, 1, "assertion failed: RELEASE key " << key << ", url " << mem_obj->url); |
62e76326 | 659 | |
2b906e48 | 660 | #endif |
62e76326 | 661 | |
d88e3c49 | 662 | assert(!EBIT_TEST(flags, RELEASE_REQUEST)); |
62e76326 | 663 | |
d88e3c49 | 664 | if (mem_obj->request) { |
665 | HttpRequest *request = mem_obj->request; | |
62e76326 | 666 | |
d88e3c49 | 667 | if (!mem_obj->vary_headers) { |
62e76326 | 668 | /* First handle the case where the object no longer varies */ |
669 | safe_free(request->vary_headers); | |
670 | } else { | |
d88e3c49 | 671 | if (request->vary_headers && strcmp(request->vary_headers, mem_obj->vary_headers) != 0) { |
62e76326 | 672 | /* Oops.. the variance has changed. Kill the base object |
673 | * to record the new variance key | |
674 | */ | |
c21ad0f5 | 675 | safe_free(request->vary_headers); /* free old "bad" variance key */ |
d88e3c49 | 676 | StoreEntry *pe = storeGetPublic(mem_obj->url, mem_obj->method); |
62e76326 | 677 | |
678 | if (pe) | |
5f33b71d | 679 | pe->release(); |
62e76326 | 680 | } |
681 | ||
682 | /* Make sure the request knows the variance status */ | |
683 | if (!request->vary_headers) { | |
d88e3c49 | 684 | const char *vary = httpMakeVaryMark(request, mem_obj->getReply()); |
62e76326 | 685 | |
686 | if (vary) | |
687 | request->vary_headers = xstrdup(vary); | |
688 | } | |
689 | } | |
690 | ||
d88e3c49 | 691 | if (mem_obj->vary_headers && !storeGetPublic(mem_obj->url, mem_obj->method)) { |
62e76326 | 692 | /* Create "vary" base object */ |
30abd221 | 693 | String vary; |
d88e3c49 | 694 | StoreEntry *pe = storeCreateEntry(mem_obj->url, mem_obj->log_url, request->flags, request->method); |
62e76326 | 695 | /* We are allowed to do this typecast */ |
eab8dcfa | 696 | HttpReply *rep = new HttpReply; |
11992b6f | 697 | rep->setHeaders(HTTP_OK, "Internal marker object", "x-squid-internal/vary", -1, -1, squid_curtime + 100000); |
d88e3c49 | 698 | vary = mem_obj->getReply()->header.getList(HDR_VARY); |
62e76326 | 699 | |
30abd221 | 700 | if (vary.size()) { |
62e76326 | 701 | /* Again, we own this structure layout */ |
b4f2886c | 702 | rep->header.putStr(HDR_VARY, vary.termedBuf()); |
30abd221 | 703 | vary.clean(); |
62e76326 | 704 | } |
705 | ||
f66a9ef4 | 706 | #if X_ACCELERATOR_VARY |
d88e3c49 | 707 | vary = mem_obj->getReply()->header.getList(HDR_X_ACCELERATOR_VARY); |
62e76326 | 708 | |
b4197865 | 709 | if (vary.defined()) { |
62e76326 | 710 | /* Again, we own this structure layout */ |
b4197865 | 711 | rep->header.putStr(HDR_X_ACCELERATOR_VARY, vary.termedBuf()); |
30abd221 | 712 | vary.clean(); |
62e76326 | 713 | } |
714 | ||
f66a9ef4 | 715 | #endif |
eab8dcfa | 716 | pe->replaceHttpReply(rep); |
62e76326 | 717 | |
3900307b | 718 | pe->timestampsSet(); |
ba27c9a0 | 719 | |
eab8dcfa | 720 | pe->makePublic(); |
62e76326 | 721 | |
62e76326 | 722 | pe->complete(); |
eab8dcfa | 723 | |
97b5e68f | 724 | pe->unlock(); |
62e76326 | 725 | } |
726 | ||
d88e3c49 | 727 | newkey = storeKeyPublicByRequest(mem_obj->request); |
f66a9ef4 | 728 | } else |
d88e3c49 | 729 | newkey = storeKeyPublic(mem_obj->url, mem_obj->method); |
62e76326 | 730 | |
9fb13bb6 | 731 | if ((e2 = (StoreEntry *) hash_lookup(store_table, newkey))) { |
bf8fe701 | 732 | debugs(20, 3, "StoreEntry::setPublicKey: Making old '" << mem_obj->url << "' private."); |
d88e3c49 | 733 | e2->setPrivateKey(); |
5f33b71d | 734 | e2->release(); |
62e76326 | 735 | |
d88e3c49 | 736 | if (mem_obj->request) |
737 | newkey = storeKeyPublicByRequest(mem_obj->request); | |
62e76326 | 738 | else |
d88e3c49 | 739 | newkey = storeKeyPublic(mem_obj->url, mem_obj->method); |
6eb42cae | 740 | } |
62e76326 | 741 | |
d88e3c49 | 742 | if (key) |
3900307b | 743 | hashDelete(); |
62e76326 | 744 | |
d88e3c49 | 745 | EBIT_CLR(flags, KEY_PRIVATE); |
62e76326 | 746 | |
3900307b | 747 | hashInsert(newkey); |
62e76326 | 748 | |
d88e3c49 | 749 | if (swap_filen > -1) |
750 | storeDirSwapLog(this, SWAP_LOG_ADD); | |
227fbb74 | 751 | } |
752 | ||
b8d8561b | 753 | StoreEntry * |
60745f24 | 754 | storeCreateEntry(const char *url, const char *log_url, request_flags flags, const HttpRequestMethod& method) |
090089c4 | 755 | { |
090089c4 | 756 | StoreEntry *e = NULL; |
30a4f2a8 | 757 | MemObject *mem = NULL; |
bf8fe701 | 758 | debugs(20, 3, "storeCreateEntry: '" << url << "'"); |
090089c4 | 759 | |
c8f4eac4 | 760 | e = new StoreEntry(url, log_url); |
c21ad0f5 | 761 | e->lock_count = 1; /* Note lock here w/o calling storeLock() */ |
30a4f2a8 | 762 | mem = e->mem_obj; |
2ac237e2 | 763 | mem->method = method; |
62e76326 | 764 | |
92695e5e | 765 | if (neighbors_do_private_keys || !flags.hierarchical) |
d88e3c49 | 766 | e->setPrivateKey(); |
86101e40 | 767 | else |
d88e3c49 | 768 | e->setPublicKey(); |
62e76326 | 769 | |
92695e5e | 770 | if (flags.cachable) { |
62e76326 | 771 | EBIT_SET(e->flags, ENTRY_CACHABLE); |
772 | EBIT_CLR(e->flags, RELEASE_REQUEST); | |
090089c4 | 773 | } else { |
d88e3c49 | 774 | /* StoreEntry::releaseRequest() clears ENTRY_CACHABLE */ |
775 | e->releaseRequest(); | |
090089c4 | 776 | } |
62e76326 | 777 | |
234967c9 | 778 | e->store_status = STORE_PENDING; |
3900307b | 779 | e->setMemStatus(NOT_IN_MEMORY); |
8350fe9b | 780 | e->swap_status = SWAPOUT_NONE; |
cd748f27 | 781 | e->swap_filen = -1; |
782 | e->swap_dirn = -1; | |
090089c4 | 783 | e->refcount = 0; |
b8de7ebe | 784 | e->lastref = squid_curtime; |
3900307b | 785 | e->timestamp = -1; /* set in StoreEntry::timestampsSet() */ |
30a4f2a8 | 786 | e->ping_status = PING_NONE; |
d46a87a8 | 787 | EBIT_SET(e->flags, ENTRY_VALIDATED); |
090089c4 | 788 | return e; |
789 | } | |
790 | ||
6eb42cae | 791 | /* Mark object as expired */ |
b8d8561b | 792 | void |
d88e3c49 | 793 | StoreEntry::expireNow() |
9174e204 | 794 | { |
bf8fe701 | 795 | debugs(20, 3, "StoreEntry::expireNow: '" << getMD5Text() << "'"); |
d88e3c49 | 796 | expires = squid_curtime; |
9174e204 | 797 | } |
798 | ||
528b2c61 | 799 | void |
800 | storeWriteComplete (void *data, StoreIOBuffer wroteBuffer) | |
801 | { | |
1d5161bd | 802 | PROF_start(storeWriteComplete); |
528b2c61 | 803 | StoreEntry *e = (StoreEntry *)data; |
62e76326 | 804 | |
1d5161bd | 805 | if (EBIT_TEST(e->flags, DELAY_SENDING)) { |
806 | PROF_stop(storeWriteComplete); | |
62e76326 | 807 | return; |
1d5161bd | 808 | } |
62e76326 | 809 | |
d88e3c49 | 810 | e->invokeHandlers(); |
1d5161bd | 811 | PROF_stop(storeWriteComplete); |
528b2c61 | 812 | } |
813 | ||
814 | void | |
815 | StoreEntry::write (StoreIOBuffer writeBuffer) | |
816 | { | |
817 | assert(mem_obj != NULL); | |
818 | assert(writeBuffer.length >= 0); | |
819 | /* This assert will change when we teach the store to update */ | |
d2639a5b | 820 | PROF_start(StoreEntry_write); |
528b2c61 | 821 | assert(store_status == STORE_PENDING); |
62e76326 | 822 | |
26ac0430 | 823 | if (!writeBuffer.length) { |
2324cda2 | 824 | /* the headers are received already, but we have not received |
43785884 | 825 | * any body data. There are BROKEN abuses of HTTP which require |
826 | * the headers to be passed along before any body data - see | |
827 | * http://developer.apple.com/documentation/QuickTime/QTSS/Concepts/chapter_2_section_14.html | |
828 | * for an example of such bad behaviour. To accomodate this, if | |
829 | * we have a empty write arrive, we flush to our clients. | |
830 | * -RBC 20060903 | |
831 | */ | |
d2639a5b | 832 | PROF_stop(StoreEntry_write); |
d88e3c49 | 833 | invokeHandlers(); |
62e76326 | 834 | return; |
26ac0430 | 835 | } |
62e76326 | 836 | |
d2639a5b | 837 | debugs(20, 5, "storeWrite: writing " << writeBuffer.length << " bytes for '" << getMD5Text() << "'"); |
838 | PROF_stop(StoreEntry_write); | |
528b2c61 | 839 | storeGetMemSpace(writeBuffer.length); |
840 | mem_obj->write (writeBuffer, storeWriteComplete, this); | |
841 | } | |
842 | ||
c21ad0f5 | 843 | /* Append incoming data from a primary server to an entry. */ |
844 | void | |
845 | StoreEntry::append(char const *buf, int len) | |
846 | { | |
847 | assert(mem_obj != NULL); | |
3a1c3e2f | 848 | assert(len >= 0); |
c21ad0f5 | 849 | assert(store_status == STORE_PENDING); |
528b2c61 | 850 | |
851 | StoreIOBuffer tempBuffer; | |
852 | tempBuffer.data = (char *)buf; | |
853 | tempBuffer.length = len; | |
aa18a4ca | 854 | /* |
855 | * XXX sigh, offset might be < 0 here, but it gets "corrected" | |
856 | * later. This offset crap is such a mess. | |
857 | */ | |
c21ad0f5 | 858 | tempBuffer.offset = mem_obj->endOffset() - (getReply() ? getReply()->hdr_sz : 0); |
859 | write(tempBuffer); | |
090089c4 | 860 | } |
861 | ||
c21ad0f5 | 862 | |
b8d8561b | 863 | void |
fe4e214f | 864 | storeAppendPrintf(StoreEntry * e, const char *fmt,...) |
15c05bb0 | 865 | { |
62d32805 | 866 | va_list args; |
867 | va_start(args, fmt); | |
62e76326 | 868 | |
cb69b4c7 | 869 | storeAppendVPrintf(e, fmt, args); |
870 | va_end(args); | |
871 | } | |
872 | ||
873 | /* used be storeAppendPrintf and Packer */ | |
874 | void | |
875 | storeAppendVPrintf(StoreEntry * e, const char *fmt, va_list vargs) | |
876 | { | |
877 | LOCAL_ARRAY(char, buf, 4096); | |
15c05bb0 | 878 | buf[0] = '\0'; |
cb69b4c7 | 879 | vsnprintf(buf, 4096, fmt, vargs); |
3900307b | 880 | e->append(buf, strlen(buf)); |
c30c5a73 | 881 | } |
882 | ||
26ac0430 | 883 | struct _store_check_cachable_hist { |
62e76326 | 884 | |
26ac0430 | 885 | struct { |
62e76326 | 886 | int non_get; |
887 | int not_entry_cachable; | |
888 | int wrong_content_length; | |
889 | int negative_cached; | |
890 | int too_big; | |
891 | int too_small; | |
892 | int private_key; | |
893 | int too_many_open_files; | |
894 | int too_many_open_fds; | |
2fadd50d | 895 | } no; |
62e76326 | 896 | |
26ac0430 | 897 | struct { |
62e76326 | 898 | int Default; |
2fadd50d HN |
899 | } yes; |
900 | } store_check_cachable_hist; | |
8423ff74 | 901 | |
c47511fd | 902 | int |
903 | storeTooManyDiskFilesOpen(void) | |
904 | { | |
905 | if (Config.max_open_disk_fds == 0) | |
62e76326 | 906 | return 0; |
907 | ||
83a29c95 | 908 | if (store_open_disk_fd > Config.max_open_disk_fds) |
62e76326 | 909 | return 1; |
910 | ||
c47511fd | 911 | return 0; |
912 | } | |
913 | ||
3900307b | 914 | int |
915 | StoreEntry::checkTooSmall() | |
d20b1cd0 | 916 | { |
3900307b | 917 | if (EBIT_TEST(flags, ENTRY_SPECIAL)) |
62e76326 | 918 | return 0; |
919 | ||
3900307b | 920 | if (STORE_OK == store_status) |
921 | if (mem_obj->object_sz < 0 || | |
26ac0430 | 922 | mem_obj->object_sz < Config.Store.minObjectSize) |
62e76326 | 923 | return 1; |
3900307b | 924 | if (getReply()->content_length > -1) |
47f6e231 | 925 | if (getReply()->content_length < Config.Store.minObjectSize) |
62e76326 | 926 | return 1; |
d20b1cd0 | 927 | return 0; |
928 | } | |
929 | ||
f09f5b26 | 930 | int |
3900307b | 931 | StoreEntry::checkCachable() |
6602e70e | 932 | { |
2ac237e2 | 933 | #if CACHE_ALL_METHODS |
62e76326 | 934 | |
3900307b | 935 | if (mem_obj->method != METHOD_GET) { |
bf8fe701 | 936 | debugs(20, 2, "StoreEntry::checkCachable: NO: non-GET method"); |
62e76326 | 937 | store_check_cachable_hist.no.non_get++; |
2ac237e2 | 938 | } else |
939 | #endif | |
3900307b | 940 | if (store_status == STORE_OK && EBIT_TEST(flags, ENTRY_BAD_LENGTH)) { |
bf8fe701 | 941 | debugs(20, 2, "StoreEntry::checkCachable: NO: wrong content-length"); |
62e76326 | 942 | store_check_cachable_hist.no.wrong_content_length++; |
3900307b | 943 | } else if (!EBIT_TEST(flags, ENTRY_CACHABLE)) { |
bf8fe701 | 944 | debugs(20, 2, "StoreEntry::checkCachable: NO: not cachable"); |
be3b12f0 | 945 | store_check_cachable_hist.no.not_entry_cachable++; |
3900307b | 946 | } else if (EBIT_TEST(flags, ENTRY_NEGCACHED)) { |
bf8fe701 | 947 | debugs(20, 3, "StoreEntry::checkCachable: NO: negative cached"); |
62e76326 | 948 | store_check_cachable_hist.no.negative_cached++; |
c21ad0f5 | 949 | return 0; /* avoid release call below */ |
3900307b | 950 | } else if ((getReply()->content_length > 0 && |
47f6e231 | 951 | getReply()->content_length |
62e76326 | 952 | > Config.Store.maxObjectSize) || |
47f6e231 | 953 | mem_obj->endOffset() > Config.Store.maxObjectSize) { |
bf8fe701 | 954 | debugs(20, 2, "StoreEntry::checkCachable: NO: too big"); |
62e76326 | 955 | store_check_cachable_hist.no.too_big++; |
47f6e231 | 956 | } else if (getReply()->content_length > Config.Store.maxObjectSize) { |
bf8fe701 | 957 | debugs(20, 2, "StoreEntry::checkCachable: NO: too big"); |
62e76326 | 958 | store_check_cachable_hist.no.too_big++; |
3900307b | 959 | } else if (checkTooSmall()) { |
bf8fe701 | 960 | debugs(20, 2, "StoreEntry::checkCachable: NO: too small"); |
62e76326 | 961 | store_check_cachable_hist.no.too_small++; |
3900307b | 962 | } else if (EBIT_TEST(flags, KEY_PRIVATE)) { |
bf8fe701 | 963 | debugs(20, 3, "StoreEntry::checkCachable: NO: private key"); |
62e76326 | 964 | store_check_cachable_hist.no.private_key++; |
3900307b | 965 | } else if (swap_status != SWAPOUT_NONE) { |
62e76326 | 966 | /* |
967 | * here we checked the swap_status because the remaining | |
968 | * cases are only relevant only if we haven't started swapping | |
969 | * out the object yet. | |
970 | */ | |
971 | return 1; | |
972 | } else if (storeTooManyDiskFilesOpen()) { | |
bf8fe701 | 973 | debugs(20, 2, "StoreEntry::checkCachable: NO: too many disk files open"); |
62e76326 | 974 | store_check_cachable_hist.no.too_many_open_files++; |
975 | } else if (fdNFree() < RESERVED_FD) { | |
bf8fe701 | 976 | debugs(20, 2, "StoreEntry::checkCachable: NO: too many FD's open"); |
62e76326 | 977 | store_check_cachable_hist.no.too_many_open_fds++; |
978 | } else { | |
979 | store_check_cachable_hist.yes.Default++; | |
980 | return 1; | |
981 | } | |
982 | ||
3900307b | 983 | releaseRequest(); |
d88e3c49 | 984 | /* StoreEntry::releaseRequest() cleared ENTRY_CACHABLE */ |
6602e70e | 985 | return 0; |
986 | } | |
987 | ||
3900307b | 988 | void |
989 | storeCheckCachableStats(StoreEntry *sentry) | |
8423ff74 | 990 | { |
c40acff3 | 991 | storeAppendPrintf(sentry, "Category\t Count\n"); |
992 | ||
a0cd8f99 | 993 | #if CACHE_ALL_METHODS |
62e76326 | 994 | |
8423ff74 | 995 | storeAppendPrintf(sentry, "no.non_get\t%d\n", |
62e76326 | 996 | store_check_cachable_hist.no.non_get); |
a0cd8f99 | 997 | #endif |
62e76326 | 998 | |
8423ff74 | 999 | storeAppendPrintf(sentry, "no.not_entry_cachable\t%d\n", |
62e76326 | 1000 | store_check_cachable_hist.no.not_entry_cachable); |
8423ff74 | 1001 | storeAppendPrintf(sentry, "no.wrong_content_length\t%d\n", |
62e76326 | 1002 | store_check_cachable_hist.no.wrong_content_length); |
8423ff74 | 1003 | storeAppendPrintf(sentry, "no.negative_cached\t%d\n", |
62e76326 | 1004 | store_check_cachable_hist.no.negative_cached); |
8423ff74 | 1005 | storeAppendPrintf(sentry, "no.too_big\t%d\n", |
62e76326 | 1006 | store_check_cachable_hist.no.too_big); |
d20b1cd0 | 1007 | storeAppendPrintf(sentry, "no.too_small\t%d\n", |
62e76326 | 1008 | store_check_cachable_hist.no.too_small); |
8423ff74 | 1009 | storeAppendPrintf(sentry, "no.private_key\t%d\n", |
62e76326 | 1010 | store_check_cachable_hist.no.private_key); |
c5f627c2 | 1011 | storeAppendPrintf(sentry, "no.too_many_open_files\t%d\n", |
62e76326 | 1012 | store_check_cachable_hist.no.too_many_open_files); |
59ffcdf8 | 1013 | storeAppendPrintf(sentry, "no.too_many_open_fds\t%d\n", |
62e76326 | 1014 | store_check_cachable_hist.no.too_many_open_fds); |
8423ff74 | 1015 | storeAppendPrintf(sentry, "yes.default\t%d\n", |
62e76326 | 1016 | store_check_cachable_hist.yes.Default); |
8423ff74 | 1017 | } |
1018 | ||
b8d8561b | 1019 | void |
528b2c61 | 1020 | StoreEntry::complete() |
090089c4 | 1021 | { |
bf8fe701 | 1022 | debugs(20, 3, "storeComplete: '" << getMD5Text() << "'"); |
62e76326 | 1023 | |
528b2c61 | 1024 | if (store_status != STORE_PENDING) { |
62e76326 | 1025 | /* |
1026 | * if we're not STORE_PENDING, then probably we got aborted | |
1027 | * and there should be NO clients on this entry | |
1028 | */ | |
1029 | assert(EBIT_TEST(flags, ENTRY_ABORTED)); | |
1030 | assert(mem_obj->nclients == 0); | |
1031 | return; | |
b6403fac | 1032 | } |
62e76326 | 1033 | |
7d31d5fa | 1034 | /* This is suspect: mem obj offsets include the headers. do we adjust for that |
1035 | * in use of object_sz? | |
1036 | */ | |
528b2c61 | 1037 | mem_obj->object_sz = mem_obj->endOffset(); |
7d31d5fa | 1038 | |
528b2c61 | 1039 | store_status = STORE_OK; |
7d31d5fa | 1040 | |
528b2c61 | 1041 | assert(mem_status == NOT_IN_MEMORY); |
62e76326 | 1042 | |
528b2c61 | 1043 | if (!validLength()) { |
62e76326 | 1044 | EBIT_SET(flags, ENTRY_BAD_LENGTH); |
d88e3c49 | 1045 | releaseRequest(); |
41587298 | 1046 | } |
62e76326 | 1047 | |
6cfa8966 | 1048 | #if USE_CACHE_DIGESTS |
528b2c61 | 1049 | if (mem_obj->request) |
62e76326 | 1050 | mem_obj->request->hier.store_complete_stop = current_time; |
1051 | ||
39edba21 | 1052 | #endif |
d20b1cd0 | 1053 | /* |
d88e3c49 | 1054 | * We used to call invokeHandlers, then storeSwapOut. However, |
d20b1cd0 | 1055 | * Madhukar Reddy <myreddy@persistence.com> reported that |
1056 | * responses without content length would sometimes get released | |
1057 | * in client_side, thinking that the response is incomplete. | |
1058 | */ | |
d88e3c49 | 1059 | invokeHandlers(); |
7e3e1d01 | 1060 | } |
1061 | ||
090089c4 | 1062 | /* |
474cac1b | 1063 | * Someone wants to abort this transfer. Set the reason in the |
1064 | * request structure, call the server-side callback and mark the | |
2b906e48 | 1065 | * entry for releasing |
090089c4 | 1066 | */ |
b8d8561b | 1067 | void |
bfb55b6f | 1068 | StoreEntry::abort() |
090089c4 | 1069 | { |
528b2c61 | 1070 | statCounter.aborted_requests++; |
bfb55b6f | 1071 | assert(store_status == STORE_PENDING); |
1072 | assert(mem_obj != NULL); | |
bf8fe701 | 1073 | debugs(20, 6, "storeAbort: " << getMD5Text()); |
34266cde | 1074 | |
ac9cc053 | 1075 | lock(); /* lock while aborting */ |
d88e3c49 | 1076 | negativeCache(); |
34266cde | 1077 | |
d88e3c49 | 1078 | releaseRequest(); |
34266cde | 1079 | |
bfb55b6f | 1080 | EBIT_SET(flags, ENTRY_ABORTED); |
34266cde | 1081 | |
3900307b | 1082 | setMemStatus(NOT_IN_MEMORY); |
34266cde | 1083 | |
bfb55b6f | 1084 | store_status = STORE_OK; |
34266cde | 1085 | |
496e1d76 | 1086 | /* |
1087 | * We assign an object length here. The only other place we assign | |
1088 | * the object length is in storeComplete() | |
1089 | */ | |
528b2c61 | 1090 | /* RBC: What do we need an object length for? we've just aborted the |
1091 | * request, the request is private and negatively cached. Surely | |
1092 | * the object length is inappropriate to set. | |
1093 | */ | |
bfb55b6f | 1094 | mem_obj->object_sz = mem_obj->endOffset(); |
34266cde | 1095 | |
474cac1b | 1096 | /* Notify the server side */ |
62e76326 | 1097 | |
8ea67c2b | 1098 | /* |
1099 | * DPW 2007-05-07 | |
1100 | * Should we check abort.data for validity? | |
1101 | */ | |
bfb55b6f | 1102 | if (mem_obj->abort.callback) { |
26ac0430 AJ |
1103 | if (!cbdataReferenceValid(mem_obj->abort.data)) |
1104 | debugs(20,1,HERE << "queueing event when abort.data is not valid"); | |
bfb55b6f | 1105 | eventAdd("mem_obj->abort.callback", |
1106 | mem_obj->abort.callback, | |
1107 | mem_obj->abort.data, | |
62e76326 | 1108 | 0.0, |
8ea67c2b | 1109 | true); |
26ac0430 | 1110 | unregisterAbort(); |
bfcaf585 | 1111 | } |
62e76326 | 1112 | |
1113 | /* XXX Should we reverse these two, so that there is no | |
26ac0430 | 1114 | * unneeded disk swapping triggered? |
528b2c61 | 1115 | */ |
474cac1b | 1116 | /* Notify the client side */ |
d88e3c49 | 1117 | invokeHandlers(); |
62e76326 | 1118 | |
cd748f27 | 1119 | /* Close any swapout file */ |
bfb55b6f | 1120 | swapOutFileClose(); |
62e76326 | 1121 | |
bfb55b6f | 1122 | unlock(); /* unlock */ |
090089c4 | 1123 | } |
1124 | ||
6d3c2758 HN |
1125 | /** |
1126 | * Clear Memory storage to accommodate the given object len | |
1127 | */ | |
1128 | void | |
d4432957 | 1129 | storeGetMemSpace(int size) |
090089c4 | 1130 | { |
1d5161bd | 1131 | PROF_start(storeGetMemSpace); |
b32508fb | 1132 | StoreEntry *e = NULL; |
20cba4b4 | 1133 | int released = 0; |
b32508fb | 1134 | static time_t last_check = 0; |
528b2c61 | 1135 | size_t pages_needed; |
6a566b9c | 1136 | RemovalPurgeWalker *walker; |
62e76326 | 1137 | |
1d5161bd | 1138 | if (squid_curtime == last_check) { |
1139 | PROF_stop(storeGetMemSpace); | |
62e76326 | 1140 | return; |
1d5161bd | 1141 | } |
62e76326 | 1142 | |
b32508fb | 1143 | last_check = squid_curtime; |
62e76326 | 1144 | |
e954773d | 1145 | pages_needed = (size / SM_PAGE_SIZE) + 1; |
62e76326 | 1146 | |
1d5161bd | 1147 | if (mem_node::InUseCount() + pages_needed < store_pages_max) { |
1148 | PROF_stop(storeGetMemSpace); | |
62e76326 | 1149 | return; |
1d5161bd | 1150 | } |
62e76326 | 1151 | |
e4049756 | 1152 | debugs(20, 2, "storeGetMemSpace: Starting, need " << pages_needed << |
1153 | " pages"); | |
62e76326 | 1154 | |
6a566b9c | 1155 | /* XXX what to set as max_scan here? */ |
1156 | walker = mem_policy->PurgeInit(mem_policy, 100000); | |
62e76326 | 1157 | |
c1dd71ae | 1158 | while ((e = walker->Next(walker))) { |
d88e3c49 | 1159 | e->purgeMem(); |
62e76326 | 1160 | released++; |
1161 | ||
1162 | if (mem_node::InUseCount() + pages_needed < store_pages_max) | |
1163 | break; | |
8350fe9b | 1164 | } |
62e76326 | 1165 | |
6a566b9c | 1166 | walker->Done(walker); |
bf8fe701 | 1167 | debugs(20, 3, "storeGetMemSpace stats:"); |
1168 | debugs(20, 3, " " << std::setw(6) << hot_obj_count << " HOT objects"); | |
1169 | debugs(20, 3, " " << std::setw(6) << released << " were released"); | |
1d5161bd | 1170 | PROF_stop(storeGetMemSpace); |
090089c4 | 1171 | } |
1172 | ||
c8f4eac4 | 1173 | |
1174 | /* thunk through to Store::Root().maintain(). Note that this would be better still | |
26ac0430 AJ |
1175 | * if registered against the root store itself, but that requires more complex |
1176 | * update logic - bigger fish to fry first. Long term each store when | |
c8f4eac4 | 1177 | * it becomes active will self register |
1178 | */ | |
1179 | void | |
1180 | Store::Maintain(void *notused) | |
1181 | { | |
1182 | Store::Root().maintain(); | |
1183 | ||
1184 | /* Reregister a maintain event .. */ | |
1185 | eventAdd("MaintainSwapSpace", Maintain, NULL, 1.0, 1); | |
1186 | ||
1187 | } | |
1188 | ||
090089c4 | 1189 | /* The maximum objects to scan for maintain storage space */ |
c21ad0f5 | 1190 | #define MAINTAIN_MAX_SCAN 1024 |
1191 | #define MAINTAIN_MAX_REMOVE 64 | |
090089c4 | 1192 | |
2b906e48 | 1193 | /* |
fcefe642 | 1194 | * This routine is to be called by main loop in main.c. |
1195 | * It removes expired objects on only one bucket for each time called. | |
fcefe642 | 1196 | * |
1197 | * This should get called 1/s from main(). | |
1198 | */ | |
679ac4f0 | 1199 | void |
c8f4eac4 | 1200 | StoreController::maintain() |
090089c4 | 1201 | { |
6a566b9c | 1202 | static time_t last_warn_time = 0; |
cd748f27 | 1203 | |
88bfe092 | 1204 | PROF_start(storeMaintainSwapSpace); |
c8f4eac4 | 1205 | swapDir->maintain(); |
62e76326 | 1206 | |
c8f4eac4 | 1207 | /* this should be emitted by the oversize dir, not globally */ |
62e76326 | 1208 | |
c8f4eac4 | 1209 | if (store_swap_size > Store::Root().maxSize()) { |
62e76326 | 1210 | if (squid_curtime - last_warn_time > 10) { |
c8f4eac4 | 1211 | debugs(20, 0, "WARNING: Disk space over limit: " << store_swap_size << " KB > " |
1212 | << Store::Root().maxSize() << " KB"); | |
62e76326 | 1213 | last_warn_time = squid_curtime; |
1214 | } | |
6a566b9c | 1215 | } |
62e76326 | 1216 | |
88bfe092 | 1217 | PROF_stop(storeMaintainSwapSpace); |
090089c4 | 1218 | } |
1219 | ||
090089c4 | 1220 | /* release an object from a cache */ |
6c78a099 | 1221 | void |
5f33b71d | 1222 | StoreEntry::release() |
090089c4 | 1223 | { |
88bfe092 | 1224 | PROF_start(storeRelease); |
bf8fe701 | 1225 | debugs(20, 3, "storeRelease: Releasing: '" << getMD5Text() << "'"); |
090089c4 | 1226 | /* If, for any reason we can't discard this object because of an |
1227 | * outstanding request, mark it for pending release */ | |
62e76326 | 1228 | |
3900307b | 1229 | if (locked()) { |
d88e3c49 | 1230 | expireNow(); |
bf8fe701 | 1231 | debugs(20, 3, "storeRelease: Only setting RELEASE_REQUEST bit"); |
d88e3c49 | 1232 | releaseRequest(); |
62e76326 | 1233 | PROF_stop(storeRelease); |
1234 | return; | |
090089c4 | 1235 | } |
62e76326 | 1236 | |
bef81ea5 | 1237 | if (StoreController::store_dirs_rebuilding && swap_filen > -1) { |
d88e3c49 | 1238 | setPrivateKey(); |
62e76326 | 1239 | |
5f33b71d | 1240 | if (mem_obj) |
3900307b | 1241 | destroyMemObject(); |
62e76326 | 1242 | |
5f33b71d | 1243 | if (swap_filen > -1) { |
62e76326 | 1244 | /* |
34266cde | 1245 | * Fake a call to StoreEntry->lock() When rebuilding is done, |
1246 | * we'll just call StoreEntry->unlock() on these. | |
62e76326 | 1247 | */ |
5f33b71d | 1248 | lock_count++; |
1249 | setReleaseFlag(); | |
1250 | LateReleaseStack.push_back(this); | |
62e76326 | 1251 | PROF_stop(storeRelease); |
1252 | return; | |
1253 | } else { | |
5f33b71d | 1254 | destroyStoreEntry(static_cast<hash_link *>(this)); |
62e76326 | 1255 | } |
43d9cf56 | 1256 | } |
62e76326 | 1257 | |
5f33b71d | 1258 | storeLog(STORE_LOG_RELEASE, this); |
62e76326 | 1259 | |
5f33b71d | 1260 | if (swap_filen > -1) { |
1261 | unlink(); | |
62e76326 | 1262 | |
5f33b71d | 1263 | if (swap_status == SWAPOUT_DONE) |
1264 | if (EBIT_TEST(flags, ENTRY_VALIDATED)) | |
1265 | store()->updateSize(swap_file_sz, -1); | |
62e76326 | 1266 | |
5f33b71d | 1267 | if (!EBIT_TEST(flags, KEY_PRIVATE)) |
1268 | storeDirSwapLog(this, SWAP_LOG_DEL); | |
62e76326 | 1269 | |
cd748f27 | 1270 | #if 0 |
62e76326 | 1271 | /* From 2.4. I think we do this in storeUnlink? */ |
5f33b71d | 1272 | storeSwapFileNumberSet(this, -1); |
62e76326 | 1273 | |
cd748f27 | 1274 | #endif |
62e76326 | 1275 | |
090089c4 | 1276 | } |
62e76326 | 1277 | |
3900307b | 1278 | setMemStatus(NOT_IN_MEMORY); |
5f33b71d | 1279 | destroyStoreEntry(static_cast<hash_link *>(this)); |
88bfe092 | 1280 | PROF_stop(storeRelease); |
090089c4 | 1281 | } |
1282 | ||
e42d5181 | 1283 | static void |
1284 | storeLateRelease(void *unused) | |
1285 | { | |
1286 | StoreEntry *e; | |
1287 | int i; | |
1288 | static int n = 0; | |
62e76326 | 1289 | |
bef81ea5 | 1290 | if (StoreController::store_dirs_rebuilding) { |
62e76326 | 1291 | eventAdd("storeLateRelease", storeLateRelease, NULL, 1.0, 1); |
1292 | return; | |
e42d5181 | 1293 | } |
62e76326 | 1294 | |
e42d5181 | 1295 | for (i = 0; i < 10; i++) { |
91caca83 | 1296 | e = LateReleaseStack.pop(); |
62e76326 | 1297 | |
1298 | if (e == NULL) { | |
1299 | /* done! */ | |
bf8fe701 | 1300 | debugs(20, 1, "storeLateRelease: released " << n << " objects"); |
62e76326 | 1301 | return; |
1302 | } | |
1303 | ||
97b5e68f | 1304 | e->unlock(); |
62e76326 | 1305 | n++; |
e42d5181 | 1306 | } |
62e76326 | 1307 | |
e42d5181 | 1308 | eventAdd("storeLateRelease", storeLateRelease, NULL, 0.0, 1); |
1309 | } | |
1310 | ||
090089c4 | 1311 | /* return 1 if a store entry is locked */ |
cd748f27 | 1312 | int |
3900307b | 1313 | StoreEntry::locked() const |
090089c4 | 1314 | { |
3900307b | 1315 | if (lock_count) |
62e76326 | 1316 | return 1; |
1317 | ||
3900307b | 1318 | if (swap_status == SWAPOUT_WRITING) |
62e76326 | 1319 | return 1; |
1320 | ||
3900307b | 1321 | if (store_status == STORE_PENDING) |
62e76326 | 1322 | return 1; |
1323 | ||
b8890359 | 1324 | /* |
1325 | * SPECIAL, PUBLIC entries should be "locked" | |
1326 | */ | |
3900307b | 1327 | if (EBIT_TEST(flags, ENTRY_SPECIAL)) |
1328 | if (!EBIT_TEST(flags, KEY_PRIVATE)) | |
62e76326 | 1329 | return 1; |
1330 | ||
30a4f2a8 | 1331 | return 0; |
090089c4 | 1332 | } |
1333 | ||
528b2c61 | 1334 | bool |
1335 | StoreEntry::validLength() const | |
6602e70e | 1336 | { |
47f6e231 | 1337 | int64_t diff; |
d8b249ef | 1338 | const HttpReply *reply; |
528b2c61 | 1339 | assert(mem_obj != NULL); |
1340 | reply = getReply(); | |
bf8fe701 | 1341 | debugs(20, 3, "storeEntryValidLength: Checking '" << getMD5Text() << "'"); |
e4049756 | 1342 | debugs(20, 5, "storeEntryValidLength: object_len = " << |
707fdc47 | 1343 | objectLen()); |
bf8fe701 | 1344 | debugs(20, 5, "storeEntryValidLength: hdr_sz = " << reply->hdr_sz); |
1345 | debugs(20, 5, "storeEntryValidLength: content_length = " << reply->content_length); | |
62e76326 | 1346 | |
d8b249ef | 1347 | if (reply->content_length < 0) { |
bf8fe701 | 1348 | debugs(20, 5, "storeEntryValidLength: Unspecified content length: " << getMD5Text()); |
62e76326 | 1349 | return 1; |
ffe4a367 | 1350 | } |
62e76326 | 1351 | |
07304bf9 | 1352 | if (reply->hdr_sz == 0) { |
bf8fe701 | 1353 | debugs(20, 5, "storeEntryValidLength: Zero header size: " << getMD5Text()); |
62e76326 | 1354 | return 1; |
ffe4a367 | 1355 | } |
62e76326 | 1356 | |
528b2c61 | 1357 | if (mem_obj->method == METHOD_HEAD) { |
bf8fe701 | 1358 | debugs(20, 5, "storeEntryValidLength: HEAD request: " << getMD5Text()); |
62e76326 | 1359 | return 1; |
ffe4a367 | 1360 | } |
62e76326 | 1361 | |
cb69b4c7 | 1362 | if (reply->sline.status == HTTP_NOT_MODIFIED) |
62e76326 | 1363 | return 1; |
1364 | ||
cb69b4c7 | 1365 | if (reply->sline.status == HTTP_NO_CONTENT) |
62e76326 | 1366 | return 1; |
1367 | ||
707fdc47 | 1368 | diff = reply->hdr_sz + reply->content_length - objectLen(); |
62e76326 | 1369 | |
ebf4efff | 1370 | if (diff == 0) |
62e76326 | 1371 | return 1; |
1372 | ||
bf8fe701 | 1373 | debugs(20, 3, "storeEntryValidLength: " << (diff < 0 ? -diff : diff) << " bytes too " << (diff < 0 ? "big" : "small") <<"; '" << getMD5Text() << "'" ); |
62e76326 | 1374 | |
ebf4efff | 1375 | return 0; |
ffe4a367 | 1376 | } |
6602e70e | 1377 | |
6b7d87bb FC |
1378 | static void |
1379 | storeRegisterWithCacheManager(void) | |
1380 | { | |
1381 | CacheManager *manager=CacheManager::GetInstance(); | |
1382 | manager->registerAction("storedir", "Store Directory Stats", Store::Stats, 0, 1); | |
1383 | manager->registerAction("store_io", "Store IO Interface Stats", storeIOStats, 0, 1); | |
1384 | manager->registerAction("store_check_cachable_stats", "storeCheckCachable() Stats", | |
26ac0430 | 1385 | storeCheckCachableStats, 0, 1); |
6b7d87bb FC |
1386 | } |
1387 | ||
b8d8561b | 1388 | void |
1389 | storeInit(void) | |
c943f331 | 1390 | { |
25535cbe | 1391 | storeKeyInit(); |
6a566b9c | 1392 | mem_policy = createRemovalPolicy(Config.memPolicy); |
8638fc66 | 1393 | storeDigestInit(); |
e3ef2b09 | 1394 | storeLogOpen(); |
e42d5181 | 1395 | eventAdd("storeLateRelease", storeLateRelease, NULL, 1.0, 1); |
c8f4eac4 | 1396 | Store::Root().init(); |
b2c141d4 | 1397 | storeRebuildStart(); |
d120ed12 FC |
1398 | |
1399 | storeRegisterWithCacheManager(); | |
62ee09ca | 1400 | } |
1401 | ||
b8d8561b | 1402 | void |
1403 | storeConfigure(void) | |
b1c0cc67 | 1404 | { |
c8f4eac4 | 1405 | store_swap_high = (long) (((float) Store::Root().maxSize() * |
62e76326 | 1406 | (float) Config.Swap.highWaterMark) / (float) 100); |
c8f4eac4 | 1407 | store_swap_low = (long) (((float) Store::Root().maxSize() * |
62e76326 | 1408 | (float) Config.Swap.lowWaterMark) / (float) 100); |
505d4821 | 1409 | store_pages_max = Config.memMaxSize / sizeof(mem_node); |
090089c4 | 1410 | } |
1411 | ||
3900307b | 1412 | int |
1413 | StoreEntry::keepInMemory() const | |
56f29785 | 1414 | { |
3900307b | 1415 | if (mem_obj == NULL) |
62e76326 | 1416 | return 0; |
1417 | ||
3900307b | 1418 | if (mem_obj->data_hdr.size() == 0) |
62e76326 | 1419 | return 0; |
1420 | ||
19fdd3f3 | 1421 | if (mem_obj->inmem_lo != 0) |
e1381638 | 1422 | return 0; |
19fdd3f3 | 1423 | |
d227e181 | 1424 | if (!Config.onoff.memory_cache_first && swap_status == SWAPOUT_DONE && refcount == 1) |
e1381638 | 1425 | return 0; |
19fdd3f3 HN |
1426 | |
1427 | return 1; | |
56f29785 | 1428 | } |
1429 | ||
edce4d98 | 1430 | int |
3900307b | 1431 | StoreEntry::checkNegativeHit() const |
edce4d98 | 1432 | { |
3900307b | 1433 | if (!EBIT_TEST(flags, ENTRY_NEGCACHED)) |
62e76326 | 1434 | return 0; |
1435 | ||
3900307b | 1436 | if (expires <= squid_curtime) |
62e76326 | 1437 | return 0; |
1438 | ||
3900307b | 1439 | if (store_status != STORE_OK) |
62e76326 | 1440 | return 0; |
1441 | ||
edce4d98 | 1442 | return 1; |
1443 | } | |
1444 | ||
ac9cc053 AJ |
1445 | /** |
1446 | * Set object for negative caching. | |
1447 | * Preserves any expiry information given by the server. | |
1448 | * In absence of proper expiry info it will set to expire immediately, | |
1449 | * or with HTTP-violations enabled the configured negative-TTL is observed | |
1450 | */ | |
b8d8561b | 1451 | void |
d88e3c49 | 1452 | StoreEntry::negativeCache() |
79b5cc5f | 1453 | { |
26ac0430 | 1454 | if (expires == 0) |
ac9cc053 AJ |
1455 | #if HTTP_VIOLATIONS |
1456 | expires = squid_curtime + Config.negativeTtl; | |
1457 | #else | |
1458 | expires = squid_curtime; | |
1459 | #endif | |
d88e3c49 | 1460 | EBIT_SET(flags, ENTRY_NEGCACHED); |
79b5cc5f | 1461 | } |
0a21bd84 | 1462 | |
1463 | void | |
1464 | storeFreeMemory(void) | |
1465 | { | |
c8f4eac4 | 1466 | Store::Root(NULL); |
9bc73deb | 1467 | #if USE_CACHE_DIGESTS |
62e76326 | 1468 | |
8638fc66 | 1469 | if (store_digest) |
62e76326 | 1470 | cacheDigestDestroy(store_digest); |
1471 | ||
c68e9c6b | 1472 | #endif |
62e76326 | 1473 | |
8638fc66 | 1474 | store_digest = NULL; |
0a21bd84 | 1475 | } |
a7e59001 | 1476 | |
1477 | int | |
1478 | expiresMoreThan(time_t expires, time_t when) | |
1479 | { | |
c21ad0f5 | 1480 | if (expires < 0) /* No Expires given */ |
62e76326 | 1481 | return 1; |
1482 | ||
48f44632 | 1483 | return (expires > (squid_curtime + when)); |
a7e59001 | 1484 | } |
fe54d06d | 1485 | |
1486 | int | |
3900307b | 1487 | StoreEntry::validToSend() const |
fe54d06d | 1488 | { |
3900307b | 1489 | if (EBIT_TEST(flags, RELEASE_REQUEST)) |
62e76326 | 1490 | return 0; |
1491 | ||
3900307b | 1492 | if (EBIT_TEST(flags, ENTRY_NEGCACHED)) |
1493 | if (expires <= squid_curtime) | |
62e76326 | 1494 | return 0; |
1495 | ||
3900307b | 1496 | if (EBIT_TEST(flags, ENTRY_ABORTED)) |
62e76326 | 1497 | return 0; |
1498 | ||
fe54d06d | 1499 | return 1; |
1500 | } | |
62663274 | 1501 | |
ca98227c | 1502 | void |
3900307b | 1503 | StoreEntry::timestampsSet() |
ca98227c | 1504 | { |
3900307b | 1505 | const HttpReply *reply = getReply(); |
2f58241d | 1506 | time_t served_date = reply->date; |
a9925b40 | 1507 | int age = reply->header.getInt(HDR_AGE); |
efd900cb | 1508 | /* |
1509 | * The timestamp calculations below tries to mimic the properties | |
1510 | * of the age calculation in RFC2616 section 13.2.3. The implementaion | |
1511 | * isn't complete, and the most notable exception from the RFC is that | |
1512 | * this does not account for response_delay, but it probably does | |
1513 | * not matter much as this is calculated immediately when the headers | |
1514 | * are received, not when the whole response has been received. | |
1515 | */ | |
2f58241d | 1516 | /* make sure that 0 <= served_date <= squid_curtime */ |
62e76326 | 1517 | |
2f58241d | 1518 | if (served_date < 0 || served_date > squid_curtime) |
62e76326 | 1519 | served_date = squid_curtime; |
1520 | ||
efd900cb | 1521 | /* |
212cbb48 | 1522 | * Compensate with Age header if origin server clock is ahead |
1523 | * of us and there is a cache in between us and the origin | |
1524 | * server. But DONT compensate if the age value is larger than | |
1525 | * squid_curtime because it results in a negative served_date. | |
efd900cb | 1526 | */ |
1527 | if (age > squid_curtime - served_date) | |
62e76326 | 1528 | if (squid_curtime > age) |
1529 | served_date = squid_curtime - age; | |
1530 | ||
0d465a25 | 1531 | if (reply->expires > 0 && reply->date > -1) |
26ac0430 | 1532 | expires = served_date + (reply->expires - reply->date); |
0d465a25 | 1533 | else |
26ac0430 | 1534 | expires = reply->expires; |
62e76326 | 1535 | |
3900307b | 1536 | lastmod = reply->last_modified; |
62e76326 | 1537 | |
3900307b | 1538 | timestamp = served_date; |
ca98227c | 1539 | } |
429fdbec | 1540 | |
bfcaf585 | 1541 | void |
3900307b | 1542 | StoreEntry::registerAbort(STABH * cb, void *data) |
bfcaf585 | 1543 | { |
3900307b | 1544 | assert(mem_obj); |
1545 | assert(mem_obj->abort.callback == NULL); | |
1546 | mem_obj->abort.callback = cb; | |
8ea67c2b | 1547 | mem_obj->abort.data = cbdataReference(data); |
bfcaf585 | 1548 | } |
1549 | ||
1550 | void | |
3900307b | 1551 | StoreEntry::unregisterAbort() |
bfcaf585 | 1552 | { |
3900307b | 1553 | assert(mem_obj); |
8ea67c2b | 1554 | if (mem_obj->abort.callback) { |
26ac0430 AJ |
1555 | mem_obj->abort.callback = NULL; |
1556 | cbdataReferenceDone(mem_obj->abort.data); | |
8ea67c2b | 1557 | } |
bfcaf585 | 1558 | } |
88738790 | 1559 | |
f09f5b26 | 1560 | void |
3900307b | 1561 | StoreEntry::dump(int l) const |
1562 | { | |
bf8fe701 | 1563 | debugs(20, l, "StoreEntry->key: " << getMD5Text()); |
1564 | debugs(20, l, "StoreEntry->next: " << next); | |
1565 | debugs(20, l, "StoreEntry->mem_obj: " << mem_obj); | |
4a7a3d56 | 1566 | debugs(20, l, "StoreEntry->timestamp: " << timestamp); |
1567 | debugs(20, l, "StoreEntry->lastref: " << lastref); | |
1568 | debugs(20, l, "StoreEntry->expires: " << expires); | |
1569 | debugs(20, l, "StoreEntry->lastmod: " << lastmod); | |
1570 | debugs(20, l, "StoreEntry->swap_file_sz: " << swap_file_sz); | |
bf8fe701 | 1571 | debugs(20, l, "StoreEntry->refcount: " << refcount); |
1572 | debugs(20, l, "StoreEntry->flags: " << storeEntryFlags(this)); | |
4a7a3d56 | 1573 | debugs(20, l, "StoreEntry->swap_dirn: " << swap_dirn); |
1574 | debugs(20, l, "StoreEntry->swap_filen: " << swap_filen); | |
1575 | debugs(20, l, "StoreEntry->lock_count: " << lock_count); | |
1576 | debugs(20, l, "StoreEntry->mem_status: " << mem_status); | |
1577 | debugs(20, l, "StoreEntry->ping_status: " << ping_status); | |
1578 | debugs(20, l, "StoreEntry->store_status: " << store_status); | |
1579 | debugs(20, l, "StoreEntry->swap_status: " << swap_status); | |
d377699f | 1580 | } |
1581 | ||
1f38f50a | 1582 | /* |
1583 | * NOTE, this function assumes only two mem states | |
1584 | */ | |
f09f5b26 | 1585 | void |
3900307b | 1586 | StoreEntry::setMemStatus(mem_status_t new_status) |
8350fe9b | 1587 | { |
3900307b | 1588 | if (new_status == mem_status) |
62e76326 | 1589 | return; |
1590 | ||
3900307b | 1591 | assert(mem_obj != NULL); |
62e76326 | 1592 | |
b93bcace | 1593 | if (new_status == IN_MEMORY) { |
3900307b | 1594 | assert(mem_obj->inmem_lo == 0); |
62e76326 | 1595 | |
3900307b | 1596 | if (EBIT_TEST(flags, ENTRY_SPECIAL)) { |
bf8fe701 | 1597 | debugs(20, 4, "StoreEntry::setMemStatus: not inserting special " << mem_obj->url << " into policy"); |
62e76326 | 1598 | } else { |
3900307b | 1599 | mem_policy->Add(mem_policy, this, &mem_obj->repl); |
bf8fe701 | 1600 | debugs(20, 4, "StoreEntry::setMemStatus: inserted mem node " << mem_obj->url); |
62e76326 | 1601 | } |
1602 | ||
1603 | hot_obj_count++; | |
b93bcace | 1604 | } else { |
3900307b | 1605 | if (EBIT_TEST(flags, ENTRY_SPECIAL)) { |
bf8fe701 | 1606 | debugs(20, 4, "StoreEntry::setMemStatus: special entry " << mem_obj->url); |
62e76326 | 1607 | } else { |
3900307b | 1608 | mem_policy->Remove(mem_policy, this, &mem_obj->repl); |
bf8fe701 | 1609 | debugs(20, 4, "StoreEntry::setMemStatus: removed mem node " << mem_obj->url); |
62e76326 | 1610 | } |
1611 | ||
1612 | hot_obj_count--; | |
b93bcace | 1613 | } |
62e76326 | 1614 | |
3900307b | 1615 | mem_status = new_status; |
8350fe9b | 1616 | } |
6e86c3e8 | 1617 | |
9fb13bb6 | 1618 | const char * |
3900307b | 1619 | StoreEntry::url() const |
9fb13bb6 | 1620 | { |
3900307b | 1621 | if (this == NULL) |
62e76326 | 1622 | return "[null_entry]"; |
3900307b | 1623 | else if (mem_obj == NULL) |
62e76326 | 1624 | return "[null_mem_obj]"; |
9fb13bb6 | 1625 | else |
3900307b | 1626 | return mem_obj->url; |
9fb13bb6 | 1627 | } |
24ffafb4 | 1628 | |
1629 | void | |
d5f8d05f | 1630 | StoreEntry::createMemObject(const char *aUrl, const char *aLogUrl) |
24ffafb4 | 1631 | { |
3900307b | 1632 | if (mem_obj) |
62e76326 | 1633 | return; |
1634 | ||
d5f8d05f | 1635 | mem_obj = new MemObject(aUrl, aLogUrl); |
c21ad0f5 | 1636 | } |
1637 | ||
1638 | /* this just sets DELAY_SENDING */ | |
1639 | void | |
1640 | StoreEntry::buffer() | |
1641 | { | |
1642 | EBIT_SET(flags, DELAY_SENDING); | |
1643 | } | |
1644 | ||
438fc1e3 | 1645 | /* this just clears DELAY_SENDING and Invokes the handlers */ |
1646 | void | |
c21ad0f5 | 1647 | StoreEntry::flush() |
438fc1e3 | 1648 | { |
c21ad0f5 | 1649 | if (EBIT_TEST(flags, DELAY_SENDING)) { |
1650 | EBIT_CLR(flags, DELAY_SENDING); | |
d88e3c49 | 1651 | invokeHandlers(); |
b66315e4 | 1652 | } |
25535cbe | 1653 | } |
07304bf9 | 1654 | |
47f6e231 | 1655 | int64_t |
707fdc47 | 1656 | StoreEntry::objectLen() const |
07304bf9 | 1657 | { |
707fdc47 | 1658 | assert(mem_obj != NULL); |
1659 | return mem_obj->object_sz; | |
07304bf9 | 1660 | } |
1661 | ||
47f6e231 | 1662 | int64_t |
b37bde1e | 1663 | StoreEntry::contentLen() const |
07304bf9 | 1664 | { |
b37bde1e | 1665 | assert(mem_obj != NULL); |
1666 | assert(getReply() != NULL); | |
1667 | return objectLen() - getReply()->hdr_sz; | |
07304bf9 | 1668 | } |
f3986a15 | 1669 | |
528b2c61 | 1670 | HttpReply const * |
1671 | StoreEntry::getReply () const | |
f3986a15 | 1672 | { |
528b2c61 | 1673 | if (NULL == mem_obj) |
62e76326 | 1674 | return NULL; |
1675 | ||
528b2c61 | 1676 | return mem_obj->getReply(); |
f3986a15 | 1677 | } |
db1cd23c | 1678 | |
1679 | void | |
3900307b | 1680 | StoreEntry::reset() |
db1cd23c | 1681 | { |
3900307b | 1682 | assert (mem_obj); |
bf8fe701 | 1683 | debugs(20, 3, "StoreEntry::reset: " << url()); |
3900307b | 1684 | mem_obj->reset(); |
1685 | HttpReply *rep = (HttpReply *) getReply(); // bypass const | |
06a5ae20 | 1686 | rep->reset(); |
3900307b | 1687 | expires = lastmod = timestamp = -1; |
db1cd23c | 1688 | } |
2b906e48 | 1689 | |
cd748f27 | 1690 | /* |
1691 | * storeFsInit | |
1692 | * | |
1693 | * This routine calls the SETUP routine for each fs type. | |
1694 | * I don't know where the best place for this is, and I'm not going to shuffle | |
1695 | * around large chunks of code right now (that can be done once its working.) | |
1696 | */ | |
1697 | void | |
1698 | storeFsInit(void) | |
1699 | { | |
22d38e05 | 1700 | storeReplSetup(); |
cd748f27 | 1701 | } |
1702 | ||
22d38e05 | 1703 | /* |
1704 | * called to add another store removal policy module | |
1705 | */ | |
1706 | void | |
a2c963ae | 1707 | storeReplAdd(const char *type, REMOVALPOLICYCREATE * create) |
22d38e05 | 1708 | { |
1709 | int i; | |
1710 | /* find the number of currently known repl types */ | |
62e76326 | 1711 | |
22d38e05 | 1712 | for (i = 0; storerepl_list && storerepl_list[i].typestr; i++) { |
62e76326 | 1713 | assert(strcmp(storerepl_list[i].typestr, type) != 0); |
22d38e05 | 1714 | } |
62e76326 | 1715 | |
22d38e05 | 1716 | /* add the new type */ |
e6ccf245 | 1717 | storerepl_list = static_cast<storerepl_entry_t *>(xrealloc(storerepl_list, (i + 2) * sizeof(storerepl_entry_t))); |
62e76326 | 1718 | |
22d38e05 | 1719 | memset(&storerepl_list[i + 1], 0, sizeof(storerepl_entry_t)); |
62e76326 | 1720 | |
22d38e05 | 1721 | storerepl_list[i].typestr = type; |
62e76326 | 1722 | |
22d38e05 | 1723 | storerepl_list[i].create = create; |
1724 | } | |
1725 | ||
1726 | /* | |
1727 | * Create a removal policy instance | |
1728 | */ | |
1729 | RemovalPolicy * | |
1730 | createRemovalPolicy(RemovalPolicySettings * settings) | |
1731 | { | |
1732 | storerepl_entry_t *r; | |
62e76326 | 1733 | |
22d38e05 | 1734 | for (r = storerepl_list; r && r->typestr; r++) { |
62e76326 | 1735 | if (strcmp(r->typestr, settings->type) == 0) |
1736 | return r->create(settings->args); | |
22d38e05 | 1737 | } |
62e76326 | 1738 | |
bf8fe701 | 1739 | debugs(20, 1, "ERROR: Unknown policy " << settings->type); |
1740 | debugs(20, 1, "ERROR: Be sure to have set cache_replacement_policy"); | |
1741 | debugs(20, 1, "ERROR: and memory_replacement_policy in squid.conf!"); | |
0c5ccf11 | 1742 | fatalf("ERROR: Unknown policy %s\n", settings->type); |
c21ad0f5 | 1743 | return NULL; /* NOTREACHED */ |
22d38e05 | 1744 | } |
1745 | ||
cd748f27 | 1746 | #if 0 |
fc8b9fc0 | 1747 | void |
1748 | storeSwapFileNumberSet(StoreEntry * e, sfileno filn) | |
1749 | { | |
1750 | if (e->swap_file_number == filn) | |
62e76326 | 1751 | return; |
1752 | ||
fc8b9fc0 | 1753 | if (filn < 0) { |
62e76326 | 1754 | assert(-1 == filn); |
1755 | storeDirMapBitReset(e->swap_file_number); | |
1756 | storeDirLRUDelete(e); | |
1757 | e->swap_file_number = -1; | |
fc8b9fc0 | 1758 | } else { |
62e76326 | 1759 | assert(-1 == e->swap_file_number); |
1760 | storeDirMapBitSet(e->swap_file_number = filn); | |
1761 | storeDirLRUAdd(e); | |
fc8b9fc0 | 1762 | } |
1763 | } | |
62e76326 | 1764 | |
cd748f27 | 1765 | #endif |
e6ccf245 | 1766 | |
4a56ee8d | 1767 | |
db237875 | 1768 | /* |
1769 | * Replace a store entry with | |
528b2c61 | 1770 | * a new reply. This eats the reply. |
1771 | */ | |
4a56ee8d | 1772 | void |
1773 | StoreEntry::replaceHttpReply(HttpReply *rep) | |
1774 | { | |
bf8fe701 | 1775 | debugs(20, 3, "StoreEntry::replaceHttpReply: " << url()); |
528b2c61 | 1776 | Packer p; |
62e76326 | 1777 | |
4a56ee8d | 1778 | if (!mem_obj) { |
bf8fe701 | 1779 | debugs(20, 0, "Attempt to replace object with no in-memory representation"); |
62e76326 | 1780 | return; |
528b2c61 | 1781 | } |
62e76326 | 1782 | |
4a56ee8d | 1783 | mem_obj->replaceHttpReply(rep); |
1784 | ||
528b2c61 | 1785 | /* TODO: when we store headers serparately remove the header portion */ |
1786 | /* TODO: mark the length of the headers ? */ | |
1787 | /* We ONLY want the headers */ | |
4a56ee8d | 1788 | packerToStoreInit(&p, this); |
62e76326 | 1789 | |
4a56ee8d | 1790 | assert (isEmpty()); |
62e76326 | 1791 | |
4a56ee8d | 1792 | getReply()->packHeadersInto(&p); |
62e76326 | 1793 | |
4a56ee8d | 1794 | rep->hdr_sz = mem_obj->endOffset(); |
62e76326 | 1795 | |
4a56ee8d | 1796 | httpBodyPackInto(&getReply()->body, &p); |
62e76326 | 1797 | |
528b2c61 | 1798 | packerClean(&p); |
1799 | } | |
62e76326 | 1800 | |
e6ccf245 | 1801 | |
528b2c61 | 1802 | char const * |
1803 | StoreEntry::getSerialisedMetaData() | |
1804 | { | |
1805 | StoreMeta *tlv_list = storeSwapMetaBuild(this); | |
1806 | int swap_hdr_sz; | |
1807 | char *result = storeSwapMetaPack(tlv_list, &swap_hdr_sz); | |
1808 | storeSwapTLVFree(tlv_list); | |
1809 | assert (swap_hdr_sz >= 0); | |
1810 | mem_obj->swap_hdr_sz = (size_t) swap_hdr_sz; | |
1811 | return result; | |
1812 | } | |
1813 | ||
1814 | bool | |
1815 | StoreEntry::swapoutPossible() | |
1816 | { | |
1817 | /* should we swap something out to disk? */ | |
bf8fe701 | 1818 | debugs(20, 7, "storeSwapOut: " << url()); |
1819 | debugs(20, 7, "storeSwapOut: store_status = " << storeStatusStr[store_status]); | |
62e76326 | 1820 | |
528b2c61 | 1821 | if (EBIT_TEST(flags, ENTRY_ABORTED)) { |
62e76326 | 1822 | assert(EBIT_TEST(flags, RELEASE_REQUEST)); |
c07cbbf4 | 1823 | swapOutFileClose(); |
62e76326 | 1824 | return false; |
528b2c61 | 1825 | } |
62e76326 | 1826 | |
528b2c61 | 1827 | if (EBIT_TEST(flags, ENTRY_SPECIAL)) { |
bf8fe701 | 1828 | debugs(20, 3, "storeSwapOut: " << url() << " SPECIAL"); |
62e76326 | 1829 | return false; |
528b2c61 | 1830 | } |
62e76326 | 1831 | |
528b2c61 | 1832 | return true; |
1833 | } | |
1834 | ||
1835 | void | |
1836 | StoreEntry::trimMemory() | |
1837 | { | |
7fef2365 | 1838 | /* |
1839 | * DPW 2007-05-09 | |
1840 | * Bug #1943. We must not let go any data for IN_MEMORY | |
1841 | * objects. We have to wait until the mem_status changes. | |
1842 | */ | |
1843 | if (mem_status == IN_MEMORY) | |
26ac0430 | 1844 | return; |
7fef2365 | 1845 | |
c07cbbf4 | 1846 | if (!swapOutAble()) { |
e1381638 AJ |
1847 | if (mem_obj->policyLowestOffsetToKeep(0) == 0) { |
1848 | /* Nothing to do */ | |
1849 | return; | |
1850 | } | |
62e76326 | 1851 | /* |
1852 | * Its not swap-able, and we're about to delete a chunk, | |
1853 | * so we must make it PRIVATE. This is tricky/ugly because | |
1854 | * for the most part, we treat swapable == cachable here. | |
1855 | */ | |
d88e3c49 | 1856 | releaseRequest(); |
62e76326 | 1857 | mem_obj->trimUnSwappable (); |
528b2c61 | 1858 | } else { |
62e76326 | 1859 | mem_obj->trimSwappable (); |
528b2c61 | 1860 | } |
1861 | } | |
62e76326 | 1862 | |
0655fa4d | 1863 | bool |
190154cf | 1864 | StoreEntry::modifiedSince(HttpRequest * request) const |
0655fa4d | 1865 | { |
1866 | int object_length; | |
1867 | time_t mod_time = lastmod; | |
1868 | ||
1869 | if (mod_time < 0) | |
1870 | mod_time = timestamp; | |
1871 | ||
bf8fe701 | 1872 | debugs(88, 3, "modifiedSince: '" << url() << "'"); |
0655fa4d | 1873 | |
4a7a3d56 | 1874 | debugs(88, 3, "modifiedSince: mod_time = " << mod_time); |
0655fa4d | 1875 | |
1876 | if (mod_time < 0) | |
1877 | return true; | |
1878 | ||
1879 | /* Find size of the object */ | |
1880 | object_length = getReply()->content_length; | |
1881 | ||
1882 | if (object_length < 0) | |
b37bde1e | 1883 | object_length = contentLen(); |
0655fa4d | 1884 | |
1885 | if (mod_time > request->ims) { | |
bf8fe701 | 1886 | debugs(88, 3, "--> YES: entry newer than client"); |
0655fa4d | 1887 | return true; |
1888 | } else if (mod_time < request->ims) { | |
bf8fe701 | 1889 | debugs(88, 3, "--> NO: entry older than client"); |
0655fa4d | 1890 | return false; |
1891 | } else if (request->imslen < 0) { | |
bf8fe701 | 1892 | debugs(88, 3, "--> NO: same LMT, no client length"); |
0655fa4d | 1893 | return false; |
1894 | } else if (request->imslen == object_length) { | |
bf8fe701 | 1895 | debugs(88, 3, "--> NO: same LMT, same length"); |
0655fa4d | 1896 | return false; |
1897 | } else { | |
bf8fe701 | 1898 | debugs(88, 3, "--> YES: same LMT, different length"); |
0655fa4d | 1899 | return true; |
1900 | } | |
1901 | } | |
1902 | ||
c8f4eac4 | 1903 | StorePointer |
1904 | StoreEntry::store() const | |
1905 | { | |
1906 | assert(0 <= swap_dirn && swap_dirn < Config.cacheSwap.n_configured); | |
1907 | return INDEXSD(swap_dirn); | |
1908 | } | |
1909 | ||
1910 | void | |
1911 | StoreEntry::unlink() | |
1912 | { | |
1913 | store()->unlink(*this); | |
1914 | } | |
0655fa4d | 1915 | |
aa18a4ca | 1916 | /* |
1917 | * return true if the entry is in a state where | |
1918 | * it can accept more data (ie with write() method) | |
1919 | */ | |
1920 | bool | |
1921 | StoreEntry::isAccepting() const | |
1922 | { | |
1923 | if (STORE_PENDING != store_status) | |
1924 | return false; | |
1925 | ||
1926 | if (EBIT_TEST(flags, ENTRY_ABORTED)) | |
1927 | return false; | |
1928 | ||
1929 | return true; | |
1930 | } | |
1931 | ||
e6ccf245 | 1932 | /* NullStoreEntry */ |
1933 | ||
1934 | NullStoreEntry NullStoreEntry::_instance; | |
1935 | ||
1936 | NullStoreEntry * | |
1937 | NullStoreEntry::getInstance() | |
1938 | { | |
1939 | return &_instance; | |
1940 | } | |
332dafa2 | 1941 | |
1942 | char const * | |
1943 | NullStoreEntry::getMD5Text() const | |
1944 | { | |
1945 | return "N/A"; | |
1946 | } | |
528b2c61 | 1947 | |
43ae1d95 | 1948 | void |
1949 | NullStoreEntry::operator delete(void*) | |
1950 | { | |
1951 | fatal ("Attempt to delete NullStoreEntry\n"); | |
1952 | } | |
1953 | ||
528b2c61 | 1954 | char const * |
1955 | NullStoreEntry::getSerialisedMetaData() | |
1956 | { | |
1957 | return NULL; | |
1958 | } | |
1959 | ||
1960 | #ifndef _USE_INLINE_ | |
1961 | #include "Store.cci" | |
1962 | #endif |