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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 | |
582c2af2 | 36 | #include "squid.h" |
b814e8d4 | 37 | #include "CacheDigest.h" |
ec20038e AJ |
38 | #include "CacheManager.h" |
39 | #include "comm/Connection.h" | |
81a94152 | 40 | #include "ETag.h" |
a553a5a3 | 41 | #include "event.h" |
04f55905 | 42 | #include "fde.h" |
582c2af2 | 43 | #include "http.h" |
528b2c61 | 44 | #include "HttpReply.h" |
45 | #include "HttpRequest.h" | |
528b2c61 | 46 | #include "mem_node.h" |
582c2af2 FC |
47 | #include "MemObject.h" |
48 | #include "mgr/Registration.h" | |
49 | #include "mgr/StoreIoAction.h" | |
50 | #include "profiler/Profiler.h" | |
51 | #include "protos.h" | |
e452f48d | 52 | #include "repl_modules.h" |
582c2af2 FC |
53 | #include "SquidTime.h" |
54 | #include "Stack.h" | |
e4f1fdae | 55 | #include "StatCounters.h" |
582c2af2 | 56 | #include "stmem.h" |
35a28a37 | 57 | #include "store_digest.h" |
fb548aaf | 58 | #include "store_key_md5.h" |
e87137f1 | 59 | #include "store_key_md5.h" |
10818c0a | 60 | #include "store_log.h" |
687f5275 | 61 | #include "store_rebuild.h" |
e87137f1 FC |
62 | #include "Store.h" |
63 | #include "StoreClient.h" | |
64 | #include "StoreIOState.h" | |
65 | #include "StoreMeta.h" | |
66 | #include "StrList.h" | |
582c2af2 | 67 | #include "swap_log_op.h" |
e87137f1 | 68 | #include "SwapDir.h" |
9a0a18de | 69 | #if USE_DELAY_POOLS |
b67e2c8c | 70 | #include "DelayPools.h" |
71 | #endif | |
582c2af2 FC |
72 | #if HAVE_LIMITS_H |
73 | #include <limits.h> | |
74 | #endif | |
090089c4 | 75 | |
528b2c61 | 76 | static STMCB storeWriteComplete; |
77 | ||
090089c4 | 78 | #define REBUILD_TIMESTAMP_DELTA_MAX 2 |
227fbb74 | 79 | |
c21ad0f5 | 80 | #define STORE_IN_MEM_BUCKETS (229) |
090089c4 | 81 | |
4b981814 AJ |
82 | /** \todo Convert these string constants to enum string-arrays generated */ |
83 | ||
26ac0430 AJ |
84 | const char *memStatusStr[] = { |
85 | "NOT_IN_MEMORY", | |
86 | "IN_MEMORY" | |
87 | }; | |
88 | ||
89 | const char *pingStatusStr[] = { | |
90 | "PING_NONE", | |
91 | "PING_WAITING", | |
92 | "PING_DONE" | |
93 | }; | |
94 | ||
95 | const char *storeStatusStr[] = { | |
96 | "STORE_OK", | |
97 | "STORE_PENDING" | |
98 | }; | |
99 | ||
100 | const char *swapStatusStr[] = { | |
101 | "SWAPOUT_NONE", | |
102 | "SWAPOUT_WRITING", | |
103 | "SWAPOUT_DONE" | |
104 | }; | |
9dfb6c1c | 105 | |
25b6a907 | 106 | /* |
107 | * This defines an repl type | |
108 | */ | |
109 | ||
110 | typedef struct _storerepl_entry storerepl_entry_t; | |
111 | ||
26ac0430 | 112 | struct _storerepl_entry { |
25b6a907 | 113 | const char *typestr; |
114 | REMOVALPOLICYCREATE *create; | |
115 | }; | |
116 | ||
117 | static storerepl_entry_t *storerepl_list = NULL; | |
118 | ||
e3ef2b09 | 119 | /* |
120 | * local function prototypes | |
121 | */ | |
007b8be4 | 122 | static int getKeyCounter(void); |
8423ff74 | 123 | static OBJH storeCheckCachableStats; |
e42d5181 | 124 | static EVH storeLateRelease; |
a21fbb54 | 125 | |
e3ef2b09 | 126 | /* |
127 | * local variables | |
128 | */ | |
91caca83 | 129 | static Stack<StoreEntry*> LateReleaseStack; |
04eb0689 | 130 | MemAllocator *StoreEntry::pool = NULL; |
e6ccf245 | 131 | |
c8f4eac4 | 132 | StorePointer Store::CurrentRoot = NULL; |
133 | ||
134 | void | |
135 | Store::Root(Store * aRoot) | |
136 | { | |
137 | CurrentRoot = aRoot; | |
138 | } | |
139 | ||
140 | void | |
141 | Store::Root(StorePointer aRoot) | |
142 | { | |
143 | Root(aRoot.getRaw()); | |
144 | } | |
145 | ||
146 | void | |
147 | Store::Stats(StoreEntry * output) | |
148 | { | |
149 | assert (output); | |
150 | Root().stat(*output); | |
151 | } | |
152 | ||
153 | void | |
154 | Store::create() | |
155 | {} | |
156 | ||
157 | void | |
158 | Store::diskFull() | |
159 | {} | |
160 | ||
161 | void | |
162 | Store::sync() | |
163 | {} | |
164 | ||
165 | void | |
166 | Store::unlink (StoreEntry &anEntry) | |
167 | { | |
168 | fatal("Store::unlink on invalid Store\n"); | |
169 | } | |
170 | ||
e6ccf245 | 171 | void * |
3b13a8fd | 172 | StoreEntry::operator new (size_t bytecount) |
e6ccf245 | 173 | { |
3b13a8fd | 174 | assert (bytecount == sizeof (StoreEntry)); |
62e76326 | 175 | |
e6ccf245 | 176 | if (!pool) { |
04eb0689 | 177 | pool = memPoolCreate ("StoreEntry", bytecount); |
b001e822 | 178 | pool->setChunkSize(2048 * 1024); |
e6ccf245 | 179 | } |
62e76326 | 180 | |
b001e822 | 181 | return pool->alloc(); |
e6ccf245 | 182 | } |
183 | ||
184 | void | |
3b13a8fd | 185 | StoreEntry::operator delete (void *address) |
e6ccf245 | 186 | { |
dc47f531 | 187 | pool->freeOne(address); |
e6ccf245 | 188 | } |
189 | ||
5ed72359 | 190 | void |
191 | StoreEntry::makePublic() | |
192 | { | |
193 | /* This object can be cached for a long time */ | |
194 | ||
195 | if (EBIT_TEST(flags, ENTRY_CACHABLE)) | |
d88e3c49 | 196 | setPublicKey(); |
5ed72359 | 197 | } |
198 | ||
199 | void | |
200 | StoreEntry::makePrivate() | |
201 | { | |
202 | /* This object should never be cached at all */ | |
d88e3c49 | 203 | expireNow(); |
204 | releaseRequest(); /* delete object when not used */ | |
205 | /* releaseRequest clears ENTRY_CACHABLE flag */ | |
5ed72359 | 206 | } |
207 | ||
208 | void | |
209 | StoreEntry::cacheNegatively() | |
210 | { | |
211 | /* This object may be negatively cached */ | |
d88e3c49 | 212 | negativeCache(); |
5ed72359 | 213 | |
214 | if (EBIT_TEST(flags, ENTRY_CACHABLE)) | |
d88e3c49 | 215 | setPublicKey(); |
5ed72359 | 216 | } |
217 | ||
e6ccf245 | 218 | size_t |
3b13a8fd | 219 | StoreEntry::inUseCount() |
e6ccf245 | 220 | { |
221 | if (!pool) | |
62e76326 | 222 | return 0; |
9f9e06f3 | 223 | return pool->getInUseCount(); |
e6ccf245 | 224 | } |
225 | ||
332dafa2 | 226 | const char * |
3b13a8fd | 227 | StoreEntry::getMD5Text() const |
332dafa2 | 228 | { |
229 | return storeKeyText((const cache_key *)key); | |
230 | } | |
231 | ||
a46d2c0e | 232 | #include "comm.h" |
233 | ||
234 | void | |
235 | StoreEntry::DeferReader(void *theContext, CommRead const &aRead) | |
e6ccf245 | 236 | { |
a46d2c0e | 237 | StoreEntry *anEntry = (StoreEntry *)theContext; |
3e4bebf8 | 238 | anEntry->delayAwareRead(aRead.conn, |
a46d2c0e | 239 | aRead.buf, |
240 | aRead.len, | |
65517dc8 | 241 | aRead.callback); |
e6ccf245 | 242 | } |
66cedb85 | 243 | |
a46d2c0e | 244 | void |
3e4bebf8 | 245 | StoreEntry::delayAwareRead(const Comm::ConnectionPointer &conn, char *buf, int len, AsyncCall::Pointer callback) |
a46d2c0e | 246 | { |
247 | size_t amountToRead = bytesWanted(Range<size_t>(0, len)); | |
248 | /* sketch: readdeferer* = getdeferer. | |
65517dc8 | 249 | * ->deferRead (fd, buf, len, callback, DelayAwareRead, this) |
a46d2c0e | 250 | */ |
251 | ||
252 | if (amountToRead == 0) { | |
253 | assert (mem_obj); | |
254 | /* read ahead limit */ | |
255 | /* Perhaps these two calls should both live in MemObject */ | |
9a0a18de | 256 | #if USE_DELAY_POOLS |
a46d2c0e | 257 | if (!mem_obj->readAheadPolicyCanRead()) { |
a5f42284 | 258 | #endif |
3e4bebf8 | 259 | mem_obj->delayRead(DeferredRead(DeferReader, this, CommRead(conn, buf, len, callback))); |
a46d2c0e | 260 | return; |
9a0a18de | 261 | #if USE_DELAY_POOLS |
a46d2c0e | 262 | } |
263 | ||
264 | /* delay id limit */ | |
3e4bebf8 | 265 | mem_obj->mostBytesAllowed().delayRead(DeferredRead(DeferReader, this, CommRead(conn, buf, len, callback))); |
a46d2c0e | 266 | return; |
a5f42284 | 267 | |
268 | #endif | |
269 | ||
a46d2c0e | 270 | } |
271 | ||
109cf61c | 272 | if (fd_table[conn->fd].closing()) { |
f5f9e44c AR |
273 | // Readers must have closing callbacks if they want to be notified. No |
274 | // readers appeared to care around 2009/12/14 as they skipped reading | |
275 | // for other reasons. Closing may already be true at the delyaAwareRead | |
276 | // call time or may happen while we wait after delayRead() above. | |
109cf61c | 277 | debugs(20, 3, HERE << "wont read from closing " << conn << " for " << |
f5f9e44c AR |
278 | callback); |
279 | return; // the read callback will never be called | |
280 | } | |
281 | ||
3e4bebf8 | 282 | comm_read(conn, buf, amountToRead, callback); |
a46d2c0e | 283 | } |
284 | ||
285 | size_t | |
384a7590 | 286 | StoreEntry::bytesWanted (Range<size_t> const aRange, bool ignoreDelayPools) const |
528b2c61 | 287 | { |
528b2c61 | 288 | if (mem_obj == NULL) |
4dc2b072 | 289 | return aRange.end; |
62e76326 | 290 | |
bc87dc25 | 291 | #if URL_CHECKSUM_DEBUG |
62e76326 | 292 | |
528b2c61 | 293 | mem_obj->checkUrlChecksum(); |
62e76326 | 294 | |
528b2c61 | 295 | #endif |
62e76326 | 296 | |
a46d2c0e | 297 | if (!mem_obj->readAheadPolicyCanRead()) |
298 | return 0; | |
62e76326 | 299 | |
384a7590 | 300 | return mem_obj->mostBytesWanted(aRange.end, ignoreDelayPools); |
a46d2c0e | 301 | } |
62e76326 | 302 | |
a46d2c0e | 303 | bool |
304 | StoreEntry::checkDeferRead(int fd) const | |
305 | { | |
306 | return (bytesWanted(Range<size_t>(0,INT_MAX)) == 0); | |
307 | } | |
62e76326 | 308 | |
a46d2c0e | 309 | void |
310 | StoreEntry::setNoDelay (bool const newValue) | |
311 | { | |
312 | if (mem_obj) | |
313 | mem_obj->setNoDelay(newValue); | |
528b2c61 | 314 | } |
bc87dc25 | 315 | |
528b2c61 | 316 | store_client_t |
317 | StoreEntry::storeClientType() const | |
227fbb74 | 318 | { |
7d31d5fa | 319 | /* The needed offset isn't in memory |
320 | * XXX TODO: this is wrong for range requests | |
321 | * as the needed offset may *not* be 0, AND | |
322 | * offset 0 in the memory object is the HTTP headers. | |
323 | */ | |
324 | ||
a2c86cbd | 325 | if (mem_status == IN_MEMORY && Config.memShared && IamWorkerProcess()) { |
9487bae9 AR |
326 | // clients of an object cached in shared memory are memory clients |
327 | return STORE_MEM_CLIENT; | |
328 | } | |
329 | ||
330 | assert(mem_obj); | |
331 | ||
528b2c61 | 332 | if (mem_obj->inmem_lo) |
62e76326 | 333 | return STORE_DISK_CLIENT; |
334 | ||
528b2c61 | 335 | if (EBIT_TEST(flags, ENTRY_ABORTED)) { |
62e76326 | 336 | /* I don't think we should be adding clients to aborted entries */ |
e0236918 | 337 | debugs(20, DBG_IMPORTANT, "storeClientType: adding to ENTRY_ABORTED entry"); |
62e76326 | 338 | return STORE_MEM_CLIENT; |
528b2c61 | 339 | } |
62e76326 | 340 | |
528b2c61 | 341 | if (store_status == STORE_OK) { |
7d31d5fa | 342 | /* the object has completed. */ |
343 | ||
344a9006 | 344 | if (mem_obj->inmem_lo == 0 && !isEmpty()) { |
47ce0a58 | 345 | if (swap_status == SWAPOUT_DONE) { |
e2851fe7 | 346 | debugs(20,7, HERE << mem_obj << " lo: " << mem_obj->inmem_lo << " hi: " << mem_obj->endOffset() << " size: " << mem_obj->object_sz); |
e1381638 AJ |
347 | if (mem_obj->endOffset() == mem_obj->object_sz) { |
348 | /* hot object fully swapped in */ | |
349 | return STORE_MEM_CLIENT; | |
350 | } | |
47ce0a58 | 351 | } else { |
e1381638 AJ |
352 | /* Memory-only, or currently being swapped out */ |
353 | return STORE_MEM_CLIENT; | |
47ce0a58 HN |
354 | } |
355 | } | |
356 | return STORE_DISK_CLIENT; | |
528b2c61 | 357 | } |
62e76326 | 358 | |
528b2c61 | 359 | /* here and past, entry is STORE_PENDING */ |
360 | /* | |
361 | * If this is the first client, let it be the mem client | |
362 | */ | |
363 | if (mem_obj->nclients == 1) | |
62e76326 | 364 | return STORE_MEM_CLIENT; |
365 | ||
528b2c61 | 366 | /* |
367 | * If there is no disk file to open yet, we must make this a | |
368 | * mem client. If we can't open the swapin file before writing | |
369 | * to the client, there is no guarantee that we will be able | |
370 | * to open it later when we really need it. | |
371 | */ | |
372 | if (swap_status == SWAPOUT_NONE) | |
62e76326 | 373 | return STORE_MEM_CLIENT; |
374 | ||
528b2c61 | 375 | /* |
376 | * otherwise, make subsequent clients read from disk so they | |
377 | * can not delay the first, and vice-versa. | |
378 | */ | |
379 | return STORE_DISK_CLIENT; | |
227fbb74 | 380 | } |
381 | ||
e2851fe7 | 382 | StoreEntry::StoreEntry(): |
9487bae9 | 383 | hidden_mem_obj(NULL), |
e2851fe7 | 384 | swap_file_sz(0) |
090089c4 | 385 | { |
59dbbc5c | 386 | debugs(20, 3, HERE << "new StoreEntry " << this); |
c8f4eac4 | 387 | mem_obj = NULL; |
62e76326 | 388 | |
c8f4eac4 | 389 | expires = lastmod = lastref = timestamp = -1; |
62e76326 | 390 | |
f58bb2f4 | 391 | swap_status = SWAPOUT_NONE; |
c8f4eac4 | 392 | swap_filen = -1; |
393 | swap_dirn = -1; | |
394 | } | |
62e76326 | 395 | |
e2851fe7 | 396 | StoreEntry::StoreEntry(const char *aUrl, const char *aLogUrl): |
9487bae9 | 397 | hidden_mem_obj(NULL), |
e2851fe7 | 398 | swap_file_sz(0) |
c8f4eac4 | 399 | { |
59dbbc5c | 400 | debugs(20, 3, HERE << "new StoreEntry " << this); |
d5f8d05f | 401 | mem_obj = new MemObject(aUrl, aLogUrl); |
62e76326 | 402 | |
c8f4eac4 | 403 | expires = lastmod = lastref = timestamp = -1; |
404 | ||
f58bb2f4 | 405 | swap_status = SWAPOUT_NONE; |
c8f4eac4 | 406 | swap_filen = -1; |
407 | swap_dirn = -1; | |
090089c4 | 408 | } |
409 | ||
6d8d05b5 DK |
410 | StoreEntry::~StoreEntry() |
411 | { | |
412 | if (swap_filen >= 0) { | |
f58bb2f4 AR |
413 | SwapDir &sd = dynamic_cast<SwapDir&>(*store()); |
414 | sd.disconnect(*this); | |
6d8d05b5 | 415 | } |
9487bae9 | 416 | delete hidden_mem_obj; |
6d8d05b5 DK |
417 | } |
418 | ||
0ad2b63b CT |
419 | #if USE_ADAPTATION |
420 | void | |
421 | StoreEntry::deferProducer(const AsyncCall::Pointer &producer) | |
422 | { | |
423 | if (!deferredProducer) | |
424 | deferredProducer = producer; | |
425 | else | |
e83cdc25 | 426 | debugs(20, 5, HERE << "Deferred producer call is allready set to: " << |
0ad2b63b CT |
427 | *deferredProducer << ", requested call: " << *producer); |
428 | } | |
429 | ||
430 | void | |
431 | StoreEntry::kickProducer() | |
432 | { | |
e83cdc25 | 433 | if (deferredProducer != NULL) { |
0ad2b63b CT |
434 | ScheduleCallHere(deferredProducer); |
435 | deferredProducer = NULL; | |
436 | } | |
437 | } | |
438 | #endif | |
439 | ||
3900307b | 440 | void |
441 | StoreEntry::destroyMemObject() | |
090089c4 | 442 | { |
3900307b | 443 | debugs(20, 3, HERE << "destroyMemObject " << mem_obj); |
444 | setMemStatus(NOT_IN_MEMORY); | |
445 | MemObject *mem = mem_obj; | |
446 | mem_obj = NULL; | |
528b2c61 | 447 | delete mem; |
9487bae9 AR |
448 | delete hidden_mem_obj; |
449 | hidden_mem_obj = NULL; | |
450 | } | |
451 | ||
452 | void | |
453 | StoreEntry::hideMemObject() | |
454 | { | |
455 | debugs(20, 3, HERE << "hiding " << mem_obj); | |
456 | assert(mem_obj); | |
457 | assert(!hidden_mem_obj); | |
458 | hidden_mem_obj = mem_obj; | |
459 | mem_obj = NULL; | |
090089c4 | 460 | } |
461 | ||
c8f4eac4 | 462 | void |
528b2c61 | 463 | destroyStoreEntry(void *data) |
090089c4 | 464 | { |
59dbbc5c | 465 | debugs(20, 3, HERE << "destroyStoreEntry: destroying " << data); |
c8f4eac4 | 466 | StoreEntry *e = static_cast<StoreEntry *>(static_cast<hash_link *>(data)); |
9e975e4e | 467 | assert(e != NULL); |
62e76326 | 468 | |
e6ccf245 | 469 | if (e == NullStoreEntry::getInstance()) |
62e76326 | 470 | return; |
471 | ||
3900307b | 472 | e->destroyMemObject(); |
62e76326 | 473 | |
3900307b | 474 | e->hashDelete(); |
62e76326 | 475 | |
332dafa2 | 476 | assert(e->key == NULL); |
62e76326 | 477 | |
e6ccf245 | 478 | delete e; |
227fbb74 | 479 | } |
090089c4 | 480 | |
090089c4 | 481 | /* ----- INTERFACE BETWEEN STORAGE MANAGER AND HASH TABLE FUNCTIONS --------- */ |
482 | ||
f09f5b26 | 483 | void |
3900307b | 484 | StoreEntry::hashInsert(const cache_key * someKey) |
090089c4 | 485 | { |
bf8fe701 | 486 | debugs(20, 3, "StoreEntry::hashInsert: Inserting Entry " << this << " key '" << storeKeyText(someKey) << "'"); |
3900307b | 487 | key = storeKeyDup(someKey); |
488 | hash_join(store_table, this); | |
090089c4 | 489 | } |
490 | ||
3900307b | 491 | void |
492 | StoreEntry::hashDelete() | |
090089c4 | 493 | { |
3900307b | 494 | hash_remove_link(store_table, this); |
495 | storeKeyFree((const cache_key *)key); | |
496 | key = NULL; | |
090089c4 | 497 | } |
498 | ||
090089c4 | 499 | /* -------------------------------------------------------------------------- */ |
500 | ||
090089c4 | 501 | /* get rid of memory copy of the object */ |
d88e3c49 | 502 | void |
503 | StoreEntry::purgeMem() | |
090089c4 | 504 | { |
d88e3c49 | 505 | if (mem_obj == NULL) |
62e76326 | 506 | return; |
507 | ||
bf8fe701 | 508 | debugs(20, 3, "StoreEntry::purgeMem: Freeing memory-copy of " << getMD5Text()); |
62e76326 | 509 | |
3900307b | 510 | destroyMemObject(); |
62e76326 | 511 | |
d88e3c49 | 512 | if (swap_status != SWAPOUT_DONE) |
513 | release(); | |
090089c4 | 514 | } |
515 | ||
c8f4eac4 | 516 | /* RBC 20050104 this is wrong- memory ref counting |
517 | * is not at all equivalent to the store 'usage' concept | |
518 | * which the replacement policies should be acting upon. | |
519 | * specifically, object iteration within stores needs | |
520 | * memory ref counting to prevent race conditions, | |
521 | * but this should not influence store replacement. | |
522 | */ | |
6a566b9c | 523 | void |
c21ad0f5 | 524 | |
525 | StoreEntry::lock() | |
6a566b9c | 526 | { |
5db6bf73 | 527 | ++lock_count; |
34266cde | 528 | debugs(20, 3, "StoreEntry::lock: key '" << getMD5Text() <<"' count=" << |
bf8fe701 | 529 | lock_count ); |
c21ad0f5 | 530 | lastref = squid_curtime; |
531 | Store::Root().reference(*this); | |
090089c4 | 532 | } |
533 | ||
43ae1d95 | 534 | void |
535 | StoreEntry::setReleaseFlag() | |
536 | { | |
537 | if (EBIT_TEST(flags, RELEASE_REQUEST)) | |
538 | return; | |
539 | ||
bf8fe701 | 540 | debugs(20, 3, "StoreEntry::setReleaseFlag: '" << getMD5Text() << "'"); |
43ae1d95 | 541 | |
542 | EBIT_SET(flags, RELEASE_REQUEST); | |
543 | } | |
544 | ||
b8d8561b | 545 | void |
d88e3c49 | 546 | StoreEntry::releaseRequest() |
2285407f | 547 | { |
d88e3c49 | 548 | if (EBIT_TEST(flags, RELEASE_REQUEST)) |
62e76326 | 549 | return; |
550 | ||
d88e3c49 | 551 | setReleaseFlag(); |
62e76326 | 552 | |
f3e570e9 | 553 | /* |
554 | * Clear cachable flag here because we might get called before | |
555 | * anyone else even looks at the cachability flag. Also, this | |
556 | * prevents httpMakePublic from really setting a public key. | |
557 | */ | |
d88e3c49 | 558 | EBIT_CLR(flags, ENTRY_CACHABLE); |
62e76326 | 559 | |
d88e3c49 | 560 | setPrivateKey(); |
2285407f | 561 | } |
562 | ||
090089c4 | 563 | /* unlock object, return -1 if object get released after unlock |
564 | * otherwise lock_count */ | |
b8d8561b | 565 | int |
c21ad0f5 | 566 | StoreEntry::unlock() |
090089c4 | 567 | { |
5e263176 | 568 | --lock_count; |
bf8fe701 | 569 | debugs(20, 3, "StoreEntry::unlock: key '" << getMD5Text() << "' count=" << lock_count); |
62e76326 | 570 | |
c21ad0f5 | 571 | if (lock_count) |
572 | return (int) lock_count; | |
62e76326 | 573 | |
c21ad0f5 | 574 | if (store_status == STORE_PENDING) |
575 | setReleaseFlag(); | |
62e76326 | 576 | |
c21ad0f5 | 577 | assert(storePendingNClients(this) == 0); |
62e76326 | 578 | |
9199139f | 579 | if (EBIT_TEST(flags, RELEASE_REQUEST)) { |
5f33b71d | 580 | this->release(); |
984f9874 AR |
581 | return 0; |
582 | } | |
583 | ||
9487bae9 | 584 | if (EBIT_TEST(flags, KEY_PRIVATE)) |
e0236918 | 585 | debugs(20, DBG_IMPORTANT, "WARNING: " << __FILE__ << ":" << __LINE__ << ": found KEY_PRIVATE"); |
62e76326 | 586 | |
9487bae9 | 587 | Store::Root().handleIdleEntry(*this); // may delete us |
6c895381 | 588 | return 0; |
090089c4 | 589 | } |
590 | ||
e6ccf245 | 591 | void |
60745f24 | 592 | StoreEntry::getPublicByRequestMethod (StoreClient *aClient, HttpRequest * request, const HttpRequestMethod& method) |
e6ccf245 | 593 | { |
594 | assert (aClient); | |
3b13a8fd | 595 | StoreEntry *result = storeGetPublicByRequestMethod( request, method); |
62e76326 | 596 | |
e6ccf245 | 597 | if (!result) |
62e76326 | 598 | aClient->created (NullStoreEntry::getInstance()); |
e6ccf245 | 599 | else |
62e76326 | 600 | aClient->created (result); |
e6ccf245 | 601 | } |
602 | ||
603 | void | |
190154cf | 604 | StoreEntry::getPublicByRequest (StoreClient *aClient, HttpRequest * request) |
e6ccf245 | 605 | { |
606 | assert (aClient); | |
3b13a8fd | 607 | StoreEntry *result = storeGetPublicByRequest (request); |
62e76326 | 608 | |
e6ccf245 | 609 | if (!result) |
62e76326 | 610 | result = NullStoreEntry::getInstance(); |
611 | ||
e6ccf245 | 612 | aClient->created (result); |
613 | } | |
614 | ||
615 | void | |
60745f24 | 616 | StoreEntry::getPublic (StoreClient *aClient, const char *uri, const HttpRequestMethod& method) |
e6ccf245 | 617 | { |
618 | assert (aClient); | |
3b13a8fd | 619 | StoreEntry *result = storeGetPublic (uri, method); |
62e76326 | 620 | |
e6ccf245 | 621 | if (!result) |
62e76326 | 622 | result = NullStoreEntry::getInstance(); |
623 | ||
e6ccf245 | 624 | aClient->created (result); |
625 | } | |
626 | ||
08e5d64f | 627 | StoreEntry * |
60745f24 | 628 | storeGetPublic(const char *uri, const HttpRequestMethod& method) |
08e5d64f | 629 | { |
c8f4eac4 | 630 | return Store::Root().get(storeKeyPublic(uri, method)); |
08e5d64f | 631 | } |
632 | ||
f66a9ef4 | 633 | StoreEntry * |
60745f24 | 634 | storeGetPublicByRequestMethod(HttpRequest * req, const HttpRequestMethod& method) |
f66a9ef4 | 635 | { |
c8f4eac4 | 636 | return Store::Root().get(storeKeyPublicByRequestMethod(req, method)); |
f66a9ef4 | 637 | } |
638 | ||
639 | StoreEntry * | |
190154cf | 640 | storeGetPublicByRequest(HttpRequest * req) |
f66a9ef4 | 641 | { |
642 | StoreEntry *e = storeGetPublicByRequestMethod(req, req->method); | |
62e76326 | 643 | |
f66a9ef4 | 644 | if (e == NULL && req->method == METHOD_HEAD) |
62e76326 | 645 | /* We can generate a HEAD reply from a cached GET object */ |
646 | e = storeGetPublicByRequestMethod(req, METHOD_GET); | |
647 | ||
f66a9ef4 | 648 | return e; |
649 | } | |
650 | ||
007b8be4 | 651 | static int |
652 | getKeyCounter(void) | |
04e8dbaa | 653 | { |
007b8be4 | 654 | static int key_counter = 0; |
62e76326 | 655 | |
007b8be4 | 656 | if (++key_counter < 0) |
62e76326 | 657 | key_counter = 1; |
658 | ||
007b8be4 | 659 | return key_counter; |
04e8dbaa | 660 | } |
661 | ||
c8f4eac4 | 662 | /* RBC 20050104 AFAICT this should become simpler: |
663 | * rather than reinserting with a special key it should be marked | |
664 | * as 'released' and then cleaned up when refcounting indicates. | |
665 | * the StoreHashIndex could well implement its 'released' in the | |
666 | * current manner. | |
667 | * Also, clean log writing should skip over ia,t | |
668 | * Otherwise, we need a 'remove from the index but not the store | |
669 | * concept'. | |
670 | */ | |
6c57e268 | 671 | void |
d88e3c49 | 672 | StoreEntry::setPrivateKey() |
227fbb74 | 673 | { |
9fb13bb6 | 674 | const cache_key *newkey; |
62e76326 | 675 | |
d88e3c49 | 676 | if (key && EBIT_TEST(flags, KEY_PRIVATE)) |
c21ad0f5 | 677 | return; /* is already private */ |
62e76326 | 678 | |
d88e3c49 | 679 | if (key) { |
680 | if (swap_filen > -1) | |
681 | storeDirSwapLog(this, SWAP_LOG_DEL); | |
62e76326 | 682 | |
3900307b | 683 | hashDelete(); |
b109de6b | 684 | } |
62e76326 | 685 | |
d88e3c49 | 686 | if (mem_obj != NULL) { |
687 | mem_obj->id = getKeyCounter(); | |
688 | newkey = storeKeyPrivate(mem_obj->url, mem_obj->method, mem_obj->id); | |
9fb13bb6 | 689 | } else { |
62e76326 | 690 | newkey = storeKeyPrivate("JUNK", METHOD_NONE, getKeyCounter()); |
9fb13bb6 | 691 | } |
62e76326 | 692 | |
9fb13bb6 | 693 | assert(hash_lookup(store_table, newkey) == NULL); |
d88e3c49 | 694 | EBIT_SET(flags, KEY_PRIVATE); |
3900307b | 695 | hashInsert(newkey); |
227fbb74 | 696 | } |
697 | ||
b8d8561b | 698 | void |
d88e3c49 | 699 | StoreEntry::setPublicKey() |
227fbb74 | 700 | { |
6eb42cae | 701 | StoreEntry *e2 = NULL; |
9fb13bb6 | 702 | const cache_key *newkey; |
62e76326 | 703 | |
d88e3c49 | 704 | if (key && !EBIT_TEST(flags, KEY_PRIVATE)) |
c21ad0f5 | 705 | return; /* is already public */ |
62e76326 | 706 | |
d88e3c49 | 707 | assert(mem_obj); |
62e76326 | 708 | |
f3e570e9 | 709 | /* |
710 | * We can't make RELEASE_REQUEST objects public. Depending on | |
711 | * when RELEASE_REQUEST gets set, we might not be swapping out | |
712 | * the object. If we're not swapping out, then subsequent | |
713 | * store clients won't be able to access object data which has | |
714 | * been freed from memory. | |
d87ebd78 | 715 | * |
716 | * If RELEASE_REQUEST is set, then ENTRY_CACHABLE should not | |
d88e3c49 | 717 | * be set, and StoreEntry::setPublicKey() should not be called. |
f3e570e9 | 718 | */ |
6a566b9c | 719 | #if MORE_DEBUG_OUTPUT |
62e76326 | 720 | |
d88e3c49 | 721 | if (EBIT_TEST(flags, RELEASE_REQUEST)) |
e0236918 | 722 | debugs(20, DBG_IMPORTANT, "assertion failed: RELEASE key " << key << ", url " << mem_obj->url); |
62e76326 | 723 | |
2b906e48 | 724 | #endif |
62e76326 | 725 | |
d88e3c49 | 726 | assert(!EBIT_TEST(flags, RELEASE_REQUEST)); |
62e76326 | 727 | |
d88e3c49 | 728 | if (mem_obj->request) { |
729 | HttpRequest *request = mem_obj->request; | |
62e76326 | 730 | |
d88e3c49 | 731 | if (!mem_obj->vary_headers) { |
62e76326 | 732 | /* First handle the case where the object no longer varies */ |
733 | safe_free(request->vary_headers); | |
734 | } else { | |
d88e3c49 | 735 | if (request->vary_headers && strcmp(request->vary_headers, mem_obj->vary_headers) != 0) { |
62e76326 | 736 | /* Oops.. the variance has changed. Kill the base object |
737 | * to record the new variance key | |
738 | */ | |
c21ad0f5 | 739 | safe_free(request->vary_headers); /* free old "bad" variance key */ |
d88e3c49 | 740 | StoreEntry *pe = storeGetPublic(mem_obj->url, mem_obj->method); |
62e76326 | 741 | |
742 | if (pe) | |
5f33b71d | 743 | pe->release(); |
62e76326 | 744 | } |
745 | ||
746 | /* Make sure the request knows the variance status */ | |
747 | if (!request->vary_headers) { | |
d88e3c49 | 748 | const char *vary = httpMakeVaryMark(request, mem_obj->getReply()); |
62e76326 | 749 | |
750 | if (vary) | |
751 | request->vary_headers = xstrdup(vary); | |
752 | } | |
753 | } | |
754 | ||
9487bae9 AR |
755 | // TODO: storeGetPublic() calls below may create unlocked entries. |
756 | // We should add/use storeHas() API or lock/unlock those entries. | |
d88e3c49 | 757 | if (mem_obj->vary_headers && !storeGetPublic(mem_obj->url, mem_obj->method)) { |
62e76326 | 758 | /* Create "vary" base object */ |
30abd221 | 759 | String vary; |
d88e3c49 | 760 | StoreEntry *pe = storeCreateEntry(mem_obj->url, mem_obj->log_url, request->flags, request->method); |
62e76326 | 761 | /* We are allowed to do this typecast */ |
eab8dcfa | 762 | HttpReply *rep = new HttpReply; |
11992b6f | 763 | rep->setHeaders(HTTP_OK, "Internal marker object", "x-squid-internal/vary", -1, -1, squid_curtime + 100000); |
d88e3c49 | 764 | vary = mem_obj->getReply()->header.getList(HDR_VARY); |
62e76326 | 765 | |
30abd221 | 766 | if (vary.size()) { |
62e76326 | 767 | /* Again, we own this structure layout */ |
b4f2886c | 768 | rep->header.putStr(HDR_VARY, vary.termedBuf()); |
30abd221 | 769 | vary.clean(); |
62e76326 | 770 | } |
771 | ||
f66a9ef4 | 772 | #if X_ACCELERATOR_VARY |
d88e3c49 | 773 | vary = mem_obj->getReply()->header.getList(HDR_X_ACCELERATOR_VARY); |
62e76326 | 774 | |
b4197865 | 775 | if (vary.defined()) { |
62e76326 | 776 | /* Again, we own this structure layout */ |
b4197865 | 777 | rep->header.putStr(HDR_X_ACCELERATOR_VARY, vary.termedBuf()); |
30abd221 | 778 | vary.clean(); |
62e76326 | 779 | } |
780 | ||
f66a9ef4 | 781 | #endif |
eab8dcfa | 782 | pe->replaceHttpReply(rep); |
62e76326 | 783 | |
3900307b | 784 | pe->timestampsSet(); |
ba27c9a0 | 785 | |
eab8dcfa | 786 | pe->makePublic(); |
62e76326 | 787 | |
62e76326 | 788 | pe->complete(); |
eab8dcfa | 789 | |
97b5e68f | 790 | pe->unlock(); |
62e76326 | 791 | } |
792 | ||
d88e3c49 | 793 | newkey = storeKeyPublicByRequest(mem_obj->request); |
f66a9ef4 | 794 | } else |
d88e3c49 | 795 | newkey = storeKeyPublic(mem_obj->url, mem_obj->method); |
62e76326 | 796 | |
9fb13bb6 | 797 | if ((e2 = (StoreEntry *) hash_lookup(store_table, newkey))) { |
bf8fe701 | 798 | debugs(20, 3, "StoreEntry::setPublicKey: Making old '" << mem_obj->url << "' private."); |
d88e3c49 | 799 | e2->setPrivateKey(); |
5f33b71d | 800 | e2->release(); |
62e76326 | 801 | |
d88e3c49 | 802 | if (mem_obj->request) |
803 | newkey = storeKeyPublicByRequest(mem_obj->request); | |
62e76326 | 804 | else |
d88e3c49 | 805 | newkey = storeKeyPublic(mem_obj->url, mem_obj->method); |
6eb42cae | 806 | } |
62e76326 | 807 | |
d88e3c49 | 808 | if (key) |
3900307b | 809 | hashDelete(); |
62e76326 | 810 | |
d88e3c49 | 811 | EBIT_CLR(flags, KEY_PRIVATE); |
62e76326 | 812 | |
3900307b | 813 | hashInsert(newkey); |
62e76326 | 814 | |
d88e3c49 | 815 | if (swap_filen > -1) |
816 | storeDirSwapLog(this, SWAP_LOG_ADD); | |
227fbb74 | 817 | } |
818 | ||
b8d8561b | 819 | StoreEntry * |
60745f24 | 820 | storeCreateEntry(const char *url, const char *log_url, request_flags flags, const HttpRequestMethod& method) |
090089c4 | 821 | { |
090089c4 | 822 | StoreEntry *e = NULL; |
30a4f2a8 | 823 | MemObject *mem = NULL; |
bf8fe701 | 824 | debugs(20, 3, "storeCreateEntry: '" << url << "'"); |
090089c4 | 825 | |
c8f4eac4 | 826 | e = new StoreEntry(url, log_url); |
c21ad0f5 | 827 | e->lock_count = 1; /* Note lock here w/o calling storeLock() */ |
30a4f2a8 | 828 | mem = e->mem_obj; |
2ac237e2 | 829 | mem->method = method; |
62e76326 | 830 | |
92695e5e | 831 | if (neighbors_do_private_keys || !flags.hierarchical) |
d88e3c49 | 832 | e->setPrivateKey(); |
86101e40 | 833 | else |
d88e3c49 | 834 | e->setPublicKey(); |
62e76326 | 835 | |
92695e5e | 836 | if (flags.cachable) { |
62e76326 | 837 | EBIT_SET(e->flags, ENTRY_CACHABLE); |
838 | EBIT_CLR(e->flags, RELEASE_REQUEST); | |
090089c4 | 839 | } else { |
d88e3c49 | 840 | /* StoreEntry::releaseRequest() clears ENTRY_CACHABLE */ |
841 | e->releaseRequest(); | |
090089c4 | 842 | } |
62e76326 | 843 | |
234967c9 | 844 | e->store_status = STORE_PENDING; |
3900307b | 845 | e->setMemStatus(NOT_IN_MEMORY); |
090089c4 | 846 | e->refcount = 0; |
b8de7ebe | 847 | e->lastref = squid_curtime; |
3900307b | 848 | e->timestamp = -1; /* set in StoreEntry::timestampsSet() */ |
30a4f2a8 | 849 | e->ping_status = PING_NONE; |
d46a87a8 | 850 | EBIT_SET(e->flags, ENTRY_VALIDATED); |
090089c4 | 851 | return e; |
852 | } | |
853 | ||
6eb42cae | 854 | /* Mark object as expired */ |
b8d8561b | 855 | void |
d88e3c49 | 856 | StoreEntry::expireNow() |
9174e204 | 857 | { |
bf8fe701 | 858 | debugs(20, 3, "StoreEntry::expireNow: '" << getMD5Text() << "'"); |
d88e3c49 | 859 | expires = squid_curtime; |
9174e204 | 860 | } |
861 | ||
528b2c61 | 862 | void |
863 | storeWriteComplete (void *data, StoreIOBuffer wroteBuffer) | |
864 | { | |
1d5161bd | 865 | PROF_start(storeWriteComplete); |
528b2c61 | 866 | StoreEntry *e = (StoreEntry *)data; |
62e76326 | 867 | |
1d5161bd | 868 | if (EBIT_TEST(e->flags, DELAY_SENDING)) { |
869 | PROF_stop(storeWriteComplete); | |
62e76326 | 870 | return; |
1d5161bd | 871 | } |
62e76326 | 872 | |
d88e3c49 | 873 | e->invokeHandlers(); |
1d5161bd | 874 | PROF_stop(storeWriteComplete); |
528b2c61 | 875 | } |
876 | ||
877 | void | |
878 | StoreEntry::write (StoreIOBuffer writeBuffer) | |
879 | { | |
880 | assert(mem_obj != NULL); | |
528b2c61 | 881 | /* This assert will change when we teach the store to update */ |
d2639a5b | 882 | PROF_start(StoreEntry_write); |
528b2c61 | 883 | assert(store_status == STORE_PENDING); |
62e76326 | 884 | |
d2639a5b | 885 | debugs(20, 5, "storeWrite: writing " << writeBuffer.length << " bytes for '" << getMD5Text() << "'"); |
886 | PROF_stop(StoreEntry_write); | |
528b2c61 | 887 | storeGetMemSpace(writeBuffer.length); |
888 | mem_obj->write (writeBuffer, storeWriteComplete, this); | |
889 | } | |
890 | ||
c21ad0f5 | 891 | /* Append incoming data from a primary server to an entry. */ |
892 | void | |
893 | StoreEntry::append(char const *buf, int len) | |
894 | { | |
895 | assert(mem_obj != NULL); | |
3a1c3e2f | 896 | assert(len >= 0); |
c21ad0f5 | 897 | assert(store_status == STORE_PENDING); |
528b2c61 | 898 | |
899 | StoreIOBuffer tempBuffer; | |
900 | tempBuffer.data = (char *)buf; | |
901 | tempBuffer.length = len; | |
aa18a4ca | 902 | /* |
903 | * XXX sigh, offset might be < 0 here, but it gets "corrected" | |
904 | * later. This offset crap is such a mess. | |
905 | */ | |
c21ad0f5 | 906 | tempBuffer.offset = mem_obj->endOffset() - (getReply() ? getReply()->hdr_sz : 0); |
907 | write(tempBuffer); | |
090089c4 | 908 | } |
909 | ||
b8d8561b | 910 | void |
fe4e214f | 911 | storeAppendPrintf(StoreEntry * e, const char *fmt,...) |
15c05bb0 | 912 | { |
62d32805 | 913 | va_list args; |
914 | va_start(args, fmt); | |
62e76326 | 915 | |
cb69b4c7 | 916 | storeAppendVPrintf(e, fmt, args); |
917 | va_end(args); | |
918 | } | |
919 | ||
920 | /* used be storeAppendPrintf and Packer */ | |
921 | void | |
922 | storeAppendVPrintf(StoreEntry * e, const char *fmt, va_list vargs) | |
923 | { | |
924 | LOCAL_ARRAY(char, buf, 4096); | |
15c05bb0 | 925 | buf[0] = '\0'; |
cb69b4c7 | 926 | vsnprintf(buf, 4096, fmt, vargs); |
3900307b | 927 | e->append(buf, strlen(buf)); |
c30c5a73 | 928 | } |
929 | ||
26ac0430 | 930 | struct _store_check_cachable_hist { |
62e76326 | 931 | |
26ac0430 | 932 | struct { |
62e76326 | 933 | int non_get; |
934 | int not_entry_cachable; | |
935 | int wrong_content_length; | |
936 | int negative_cached; | |
937 | int too_big; | |
938 | int too_small; | |
939 | int private_key; | |
940 | int too_many_open_files; | |
941 | int too_many_open_fds; | |
2fadd50d | 942 | } no; |
62e76326 | 943 | |
26ac0430 | 944 | struct { |
62e76326 | 945 | int Default; |
2fadd50d HN |
946 | } yes; |
947 | } store_check_cachable_hist; | |
8423ff74 | 948 | |
c47511fd | 949 | int |
950 | storeTooManyDiskFilesOpen(void) | |
951 | { | |
952 | if (Config.max_open_disk_fds == 0) | |
62e76326 | 953 | return 0; |
954 | ||
83a29c95 | 955 | if (store_open_disk_fd > Config.max_open_disk_fds) |
62e76326 | 956 | return 1; |
957 | ||
c47511fd | 958 | return 0; |
959 | } | |
960 | ||
3900307b | 961 | int |
962 | StoreEntry::checkTooSmall() | |
d20b1cd0 | 963 | { |
3900307b | 964 | if (EBIT_TEST(flags, ENTRY_SPECIAL)) |
62e76326 | 965 | return 0; |
966 | ||
3900307b | 967 | if (STORE_OK == store_status) |
968 | if (mem_obj->object_sz < 0 || | |
26ac0430 | 969 | mem_obj->object_sz < Config.Store.minObjectSize) |
62e76326 | 970 | return 1; |
3900307b | 971 | if (getReply()->content_length > -1) |
47f6e231 | 972 | if (getReply()->content_length < Config.Store.minObjectSize) |
62e76326 | 973 | return 1; |
d20b1cd0 | 974 | return 0; |
975 | } | |
976 | ||
ddc9b32c AR |
977 | // TODO: remove checks already performed by swapoutPossible() |
978 | // TODO: move "too many open..." checks outside -- we are called too early/late | |
f09f5b26 | 979 | int |
3900307b | 980 | StoreEntry::checkCachable() |
6602e70e | 981 | { |
2ac237e2 | 982 | #if CACHE_ALL_METHODS |
62e76326 | 983 | |
3900307b | 984 | if (mem_obj->method != METHOD_GET) { |
bf8fe701 | 985 | debugs(20, 2, "StoreEntry::checkCachable: NO: non-GET method"); |
5db6bf73 | 986 | ++store_check_cachable_hist.no.non_get; |
2ac237e2 | 987 | } else |
988 | #endif | |
3900307b | 989 | if (store_status == STORE_OK && EBIT_TEST(flags, ENTRY_BAD_LENGTH)) { |
bf8fe701 | 990 | debugs(20, 2, "StoreEntry::checkCachable: NO: wrong content-length"); |
5db6bf73 | 991 | ++store_check_cachable_hist.no.wrong_content_length; |
3900307b | 992 | } else if (!EBIT_TEST(flags, ENTRY_CACHABLE)) { |
bf8fe701 | 993 | debugs(20, 2, "StoreEntry::checkCachable: NO: not cachable"); |
5db6bf73 | 994 | ++store_check_cachable_hist.no.not_entry_cachable; |
3900307b | 995 | } else if (EBIT_TEST(flags, ENTRY_NEGCACHED)) { |
bf8fe701 | 996 | debugs(20, 3, "StoreEntry::checkCachable: NO: negative cached"); |
5db6bf73 | 997 | ++store_check_cachable_hist.no.negative_cached; |
c21ad0f5 | 998 | return 0; /* avoid release call below */ |
3900307b | 999 | } else if ((getReply()->content_length > 0 && |
47f6e231 | 1000 | getReply()->content_length |
62e76326 | 1001 | > Config.Store.maxObjectSize) || |
47f6e231 | 1002 | mem_obj->endOffset() > Config.Store.maxObjectSize) { |
bf8fe701 | 1003 | debugs(20, 2, "StoreEntry::checkCachable: NO: too big"); |
5db6bf73 | 1004 | ++store_check_cachable_hist.no.too_big; |
47f6e231 | 1005 | } else if (getReply()->content_length > Config.Store.maxObjectSize) { |
bf8fe701 | 1006 | debugs(20, 2, "StoreEntry::checkCachable: NO: too big"); |
5db6bf73 | 1007 | ++store_check_cachable_hist.no.too_big; |
3900307b | 1008 | } else if (checkTooSmall()) { |
bf8fe701 | 1009 | debugs(20, 2, "StoreEntry::checkCachable: NO: too small"); |
5db6bf73 | 1010 | ++store_check_cachable_hist.no.too_small; |
3900307b | 1011 | } else if (EBIT_TEST(flags, KEY_PRIVATE)) { |
bf8fe701 | 1012 | debugs(20, 3, "StoreEntry::checkCachable: NO: private key"); |
5db6bf73 | 1013 | ++store_check_cachable_hist.no.private_key; |
3900307b | 1014 | } else if (swap_status != SWAPOUT_NONE) { |
62e76326 | 1015 | /* |
1016 | * here we checked the swap_status because the remaining | |
1017 | * cases are only relevant only if we haven't started swapping | |
1018 | * out the object yet. | |
1019 | */ | |
1020 | return 1; | |
1021 | } else if (storeTooManyDiskFilesOpen()) { | |
bf8fe701 | 1022 | debugs(20, 2, "StoreEntry::checkCachable: NO: too many disk files open"); |
5db6bf73 | 1023 | ++store_check_cachable_hist.no.too_many_open_files; |
62e76326 | 1024 | } else if (fdNFree() < RESERVED_FD) { |
bf8fe701 | 1025 | debugs(20, 2, "StoreEntry::checkCachable: NO: too many FD's open"); |
5db6bf73 | 1026 | ++store_check_cachable_hist.no.too_many_open_fds; |
62e76326 | 1027 | } else { |
5db6bf73 | 1028 | ++store_check_cachable_hist.yes.Default; |
62e76326 | 1029 | return 1; |
1030 | } | |
1031 | ||
3900307b | 1032 | releaseRequest(); |
d88e3c49 | 1033 | /* StoreEntry::releaseRequest() cleared ENTRY_CACHABLE */ |
6602e70e | 1034 | return 0; |
1035 | } | |
1036 | ||
3900307b | 1037 | void |
1038 | storeCheckCachableStats(StoreEntry *sentry) | |
8423ff74 | 1039 | { |
c40acff3 | 1040 | storeAppendPrintf(sentry, "Category\t Count\n"); |
1041 | ||
a0cd8f99 | 1042 | #if CACHE_ALL_METHODS |
62e76326 | 1043 | |
8423ff74 | 1044 | storeAppendPrintf(sentry, "no.non_get\t%d\n", |
62e76326 | 1045 | store_check_cachable_hist.no.non_get); |
a0cd8f99 | 1046 | #endif |
62e76326 | 1047 | |
8423ff74 | 1048 | storeAppendPrintf(sentry, "no.not_entry_cachable\t%d\n", |
62e76326 | 1049 | store_check_cachable_hist.no.not_entry_cachable); |
8423ff74 | 1050 | storeAppendPrintf(sentry, "no.wrong_content_length\t%d\n", |
62e76326 | 1051 | store_check_cachable_hist.no.wrong_content_length); |
8423ff74 | 1052 | storeAppendPrintf(sentry, "no.negative_cached\t%d\n", |
62e76326 | 1053 | store_check_cachable_hist.no.negative_cached); |
8423ff74 | 1054 | storeAppendPrintf(sentry, "no.too_big\t%d\n", |
62e76326 | 1055 | store_check_cachable_hist.no.too_big); |
d20b1cd0 | 1056 | storeAppendPrintf(sentry, "no.too_small\t%d\n", |
62e76326 | 1057 | store_check_cachable_hist.no.too_small); |
8423ff74 | 1058 | storeAppendPrintf(sentry, "no.private_key\t%d\n", |
62e76326 | 1059 | store_check_cachable_hist.no.private_key); |
c5f627c2 | 1060 | storeAppendPrintf(sentry, "no.too_many_open_files\t%d\n", |
62e76326 | 1061 | store_check_cachable_hist.no.too_many_open_files); |
59ffcdf8 | 1062 | storeAppendPrintf(sentry, "no.too_many_open_fds\t%d\n", |
62e76326 | 1063 | store_check_cachable_hist.no.too_many_open_fds); |
8423ff74 | 1064 | storeAppendPrintf(sentry, "yes.default\t%d\n", |
62e76326 | 1065 | store_check_cachable_hist.yes.Default); |
8423ff74 | 1066 | } |
1067 | ||
b8d8561b | 1068 | void |
528b2c61 | 1069 | StoreEntry::complete() |
090089c4 | 1070 | { |
bf8fe701 | 1071 | debugs(20, 3, "storeComplete: '" << getMD5Text() << "'"); |
62e76326 | 1072 | |
528b2c61 | 1073 | if (store_status != STORE_PENDING) { |
62e76326 | 1074 | /* |
1075 | * if we're not STORE_PENDING, then probably we got aborted | |
1076 | * and there should be NO clients on this entry | |
1077 | */ | |
1078 | assert(EBIT_TEST(flags, ENTRY_ABORTED)); | |
1079 | assert(mem_obj->nclients == 0); | |
1080 | return; | |
b6403fac | 1081 | } |
62e76326 | 1082 | |
7d31d5fa | 1083 | /* This is suspect: mem obj offsets include the headers. do we adjust for that |
1084 | * in use of object_sz? | |
1085 | */ | |
528b2c61 | 1086 | mem_obj->object_sz = mem_obj->endOffset(); |
7d31d5fa | 1087 | |
528b2c61 | 1088 | store_status = STORE_OK; |
7d31d5fa | 1089 | |
528b2c61 | 1090 | assert(mem_status == NOT_IN_MEMORY); |
62e76326 | 1091 | |
528b2c61 | 1092 | if (!validLength()) { |
62e76326 | 1093 | EBIT_SET(flags, ENTRY_BAD_LENGTH); |
d88e3c49 | 1094 | releaseRequest(); |
41587298 | 1095 | } |
62e76326 | 1096 | |
6cfa8966 | 1097 | #if USE_CACHE_DIGESTS |
528b2c61 | 1098 | if (mem_obj->request) |
62e76326 | 1099 | mem_obj->request->hier.store_complete_stop = current_time; |
1100 | ||
39edba21 | 1101 | #endif |
d20b1cd0 | 1102 | /* |
d88e3c49 | 1103 | * We used to call invokeHandlers, then storeSwapOut. However, |
d20b1cd0 | 1104 | * Madhukar Reddy <myreddy@persistence.com> reported that |
1105 | * responses without content length would sometimes get released | |
1106 | * in client_side, thinking that the response is incomplete. | |
1107 | */ | |
d88e3c49 | 1108 | invokeHandlers(); |
7e3e1d01 | 1109 | } |
1110 | ||
090089c4 | 1111 | /* |
474cac1b | 1112 | * Someone wants to abort this transfer. Set the reason in the |
1113 | * request structure, call the server-side callback and mark the | |
2b906e48 | 1114 | * entry for releasing |
090089c4 | 1115 | */ |
b8d8561b | 1116 | void |
bfb55b6f | 1117 | StoreEntry::abort() |
090089c4 | 1118 | { |
5db6bf73 | 1119 | ++statCounter.aborted_requests; |
bfb55b6f | 1120 | assert(store_status == STORE_PENDING); |
1121 | assert(mem_obj != NULL); | |
bf8fe701 | 1122 | debugs(20, 6, "storeAbort: " << getMD5Text()); |
34266cde | 1123 | |
ac9cc053 | 1124 | lock(); /* lock while aborting */ |
d88e3c49 | 1125 | negativeCache(); |
34266cde | 1126 | |
d88e3c49 | 1127 | releaseRequest(); |
34266cde | 1128 | |
bfb55b6f | 1129 | EBIT_SET(flags, ENTRY_ABORTED); |
34266cde | 1130 | |
3900307b | 1131 | setMemStatus(NOT_IN_MEMORY); |
34266cde | 1132 | |
bfb55b6f | 1133 | store_status = STORE_OK; |
34266cde | 1134 | |
474cac1b | 1135 | /* Notify the server side */ |
62e76326 | 1136 | |
8ea67c2b | 1137 | /* |
1138 | * DPW 2007-05-07 | |
1139 | * Should we check abort.data for validity? | |
1140 | */ | |
bfb55b6f | 1141 | if (mem_obj->abort.callback) { |
26ac0430 | 1142 | if (!cbdataReferenceValid(mem_obj->abort.data)) |
e0236918 | 1143 | debugs(20, DBG_IMPORTANT,HERE << "queueing event when abort.data is not valid"); |
bfb55b6f | 1144 | eventAdd("mem_obj->abort.callback", |
1145 | mem_obj->abort.callback, | |
1146 | mem_obj->abort.data, | |
62e76326 | 1147 | 0.0, |
8ea67c2b | 1148 | true); |
26ac0430 | 1149 | unregisterAbort(); |
bfcaf585 | 1150 | } |
62e76326 | 1151 | |
1152 | /* XXX Should we reverse these two, so that there is no | |
26ac0430 | 1153 | * unneeded disk swapping triggered? |
528b2c61 | 1154 | */ |
474cac1b | 1155 | /* Notify the client side */ |
d88e3c49 | 1156 | invokeHandlers(); |
62e76326 | 1157 | |
aa1a691e AR |
1158 | // abort swap out, invalidating what was created so far (release follows) |
1159 | swapOutFileClose(StoreIOState::writerGone); | |
62e76326 | 1160 | |
bfb55b6f | 1161 | unlock(); /* unlock */ |
090089c4 | 1162 | } |
1163 | ||
6d3c2758 HN |
1164 | /** |
1165 | * Clear Memory storage to accommodate the given object len | |
1166 | */ | |
1167 | void | |
d4432957 | 1168 | storeGetMemSpace(int size) |
090089c4 | 1169 | { |
1d5161bd | 1170 | PROF_start(storeGetMemSpace); |
b32508fb | 1171 | StoreEntry *e = NULL; |
20cba4b4 | 1172 | int released = 0; |
b32508fb | 1173 | static time_t last_check = 0; |
528b2c61 | 1174 | size_t pages_needed; |
6a566b9c | 1175 | RemovalPurgeWalker *walker; |
62e76326 | 1176 | |
1d5161bd | 1177 | if (squid_curtime == last_check) { |
1178 | PROF_stop(storeGetMemSpace); | |
62e76326 | 1179 | return; |
1d5161bd | 1180 | } |
62e76326 | 1181 | |
b32508fb | 1182 | last_check = squid_curtime; |
62e76326 | 1183 | |
2ad51840 | 1184 | pages_needed = (size + SM_PAGE_SIZE-1) / SM_PAGE_SIZE; |
62e76326 | 1185 | |
1d5161bd | 1186 | if (mem_node::InUseCount() + pages_needed < store_pages_max) { |
1187 | PROF_stop(storeGetMemSpace); | |
62e76326 | 1188 | return; |
1d5161bd | 1189 | } |
62e76326 | 1190 | |
e4049756 | 1191 | debugs(20, 2, "storeGetMemSpace: Starting, need " << pages_needed << |
1192 | " pages"); | |
62e76326 | 1193 | |
6a566b9c | 1194 | /* XXX what to set as max_scan here? */ |
1195 | walker = mem_policy->PurgeInit(mem_policy, 100000); | |
62e76326 | 1196 | |
c1dd71ae | 1197 | while ((e = walker->Next(walker))) { |
d88e3c49 | 1198 | e->purgeMem(); |
5db6bf73 | 1199 | ++released; |
62e76326 | 1200 | |
1201 | if (mem_node::InUseCount() + pages_needed < store_pages_max) | |
1202 | break; | |
8350fe9b | 1203 | } |
62e76326 | 1204 | |
6a566b9c | 1205 | walker->Done(walker); |
bf8fe701 | 1206 | debugs(20, 3, "storeGetMemSpace stats:"); |
1207 | debugs(20, 3, " " << std::setw(6) << hot_obj_count << " HOT objects"); | |
1208 | debugs(20, 3, " " << std::setw(6) << released << " were released"); | |
1d5161bd | 1209 | PROF_stop(storeGetMemSpace); |
090089c4 | 1210 | } |
1211 | ||
c8f4eac4 | 1212 | /* thunk through to Store::Root().maintain(). Note that this would be better still |
26ac0430 AJ |
1213 | * if registered against the root store itself, but that requires more complex |
1214 | * update logic - bigger fish to fry first. Long term each store when | |
c8f4eac4 | 1215 | * it becomes active will self register |
1216 | */ | |
1217 | void | |
1218 | Store::Maintain(void *notused) | |
1219 | { | |
1220 | Store::Root().maintain(); | |
1221 | ||
1222 | /* Reregister a maintain event .. */ | |
1223 | eventAdd("MaintainSwapSpace", Maintain, NULL, 1.0, 1); | |
1224 | ||
1225 | } | |
1226 | ||
090089c4 | 1227 | /* The maximum objects to scan for maintain storage space */ |
c21ad0f5 | 1228 | #define MAINTAIN_MAX_SCAN 1024 |
1229 | #define MAINTAIN_MAX_REMOVE 64 | |
090089c4 | 1230 | |
2b906e48 | 1231 | /* |
fcefe642 | 1232 | * This routine is to be called by main loop in main.c. |
1233 | * It removes expired objects on only one bucket for each time called. | |
fcefe642 | 1234 | * |
1235 | * This should get called 1/s from main(). | |
1236 | */ | |
679ac4f0 | 1237 | void |
c8f4eac4 | 1238 | StoreController::maintain() |
090089c4 | 1239 | { |
6a566b9c | 1240 | static time_t last_warn_time = 0; |
cd748f27 | 1241 | |
88bfe092 | 1242 | PROF_start(storeMaintainSwapSpace); |
c8f4eac4 | 1243 | swapDir->maintain(); |
62e76326 | 1244 | |
c8f4eac4 | 1245 | /* this should be emitted by the oversize dir, not globally */ |
62e76326 | 1246 | |
39c1e1d9 | 1247 | if (Store::Root().currentSize() > Store::Root().maxSize()) { |
62e76326 | 1248 | if (squid_curtime - last_warn_time > 10) { |
c575fb6a | 1249 | debugs(20, DBG_CRITICAL, "WARNING: Disk space over limit: " |
cc34568d DK |
1250 | << Store::Root().currentSize() / 1024.0 << " KB > " |
1251 | << (Store::Root().maxSize() >> 10) << " KB"); | |
62e76326 | 1252 | last_warn_time = squid_curtime; |
1253 | } | |
6a566b9c | 1254 | } |
62e76326 | 1255 | |
88bfe092 | 1256 | PROF_stop(storeMaintainSwapSpace); |
090089c4 | 1257 | } |
1258 | ||
090089c4 | 1259 | /* release an object from a cache */ |
6c78a099 | 1260 | void |
5f33b71d | 1261 | StoreEntry::release() |
090089c4 | 1262 | { |
88bfe092 | 1263 | PROF_start(storeRelease); |
bf8fe701 | 1264 | debugs(20, 3, "storeRelease: Releasing: '" << getMD5Text() << "'"); |
090089c4 | 1265 | /* If, for any reason we can't discard this object because of an |
1266 | * outstanding request, mark it for pending release */ | |
62e76326 | 1267 | |
3900307b | 1268 | if (locked()) { |
d88e3c49 | 1269 | expireNow(); |
bf8fe701 | 1270 | debugs(20, 3, "storeRelease: Only setting RELEASE_REQUEST bit"); |
d88e3c49 | 1271 | releaseRequest(); |
62e76326 | 1272 | PROF_stop(storeRelease); |
1273 | return; | |
090089c4 | 1274 | } |
62e76326 | 1275 | |
bef81ea5 | 1276 | if (StoreController::store_dirs_rebuilding && swap_filen > -1) { |
d88e3c49 | 1277 | setPrivateKey(); |
62e76326 | 1278 | |
5f33b71d | 1279 | if (mem_obj) |
3900307b | 1280 | destroyMemObject(); |
62e76326 | 1281 | |
5f33b71d | 1282 | if (swap_filen > -1) { |
62e76326 | 1283 | /* |
34266cde | 1284 | * Fake a call to StoreEntry->lock() When rebuilding is done, |
1285 | * we'll just call StoreEntry->unlock() on these. | |
62e76326 | 1286 | */ |
5db6bf73 | 1287 | ++lock_count; |
5f33b71d | 1288 | setReleaseFlag(); |
1289 | LateReleaseStack.push_back(this); | |
62e76326 | 1290 | } else { |
5f33b71d | 1291 | destroyStoreEntry(static_cast<hash_link *>(this)); |
22c25cbb | 1292 | // "this" is no longer valid |
62e76326 | 1293 | } |
22c25cbb AR |
1294 | |
1295 | PROF_stop(storeRelease); | |
1296 | return; | |
43d9cf56 | 1297 | } |
62e76326 | 1298 | |
5f33b71d | 1299 | storeLog(STORE_LOG_RELEASE, this); |
62e76326 | 1300 | |
5f33b71d | 1301 | if (swap_filen > -1) { |
f58bb2f4 | 1302 | // log before unlink() below clears swap_filen |
5f33b71d | 1303 | if (!EBIT_TEST(flags, KEY_PRIVATE)) |
1304 | storeDirSwapLog(this, SWAP_LOG_DEL); | |
62e76326 | 1305 | |
f58bb2f4 | 1306 | unlink(); |
090089c4 | 1307 | } |
62e76326 | 1308 | |
3900307b | 1309 | setMemStatus(NOT_IN_MEMORY); |
5f33b71d | 1310 | destroyStoreEntry(static_cast<hash_link *>(this)); |
88bfe092 | 1311 | PROF_stop(storeRelease); |
090089c4 | 1312 | } |
1313 | ||
e42d5181 | 1314 | static void |
1315 | storeLateRelease(void *unused) | |
1316 | { | |
1317 | StoreEntry *e; | |
1318 | int i; | |
1319 | static int n = 0; | |
62e76326 | 1320 | |
bef81ea5 | 1321 | if (StoreController::store_dirs_rebuilding) { |
62e76326 | 1322 | eventAdd("storeLateRelease", storeLateRelease, NULL, 1.0, 1); |
1323 | return; | |
e42d5181 | 1324 | } |
62e76326 | 1325 | |
5db6bf73 | 1326 | for (i = 0; i < 10; ++i) { |
eb7e416e | 1327 | e = LateReleaseStack.count ? LateReleaseStack.pop() : NULL; |
62e76326 | 1328 | |
1329 | if (e == NULL) { | |
1330 | /* done! */ | |
e0236918 | 1331 | debugs(20, DBG_IMPORTANT, "storeLateRelease: released " << n << " objects"); |
62e76326 | 1332 | return; |
1333 | } | |
1334 | ||
97b5e68f | 1335 | e->unlock(); |
5db6bf73 | 1336 | ++n; |
e42d5181 | 1337 | } |
62e76326 | 1338 | |
e42d5181 | 1339 | eventAdd("storeLateRelease", storeLateRelease, NULL, 0.0, 1); |
1340 | } | |
1341 | ||
090089c4 | 1342 | /* return 1 if a store entry is locked */ |
cd748f27 | 1343 | int |
3900307b | 1344 | StoreEntry::locked() const |
090089c4 | 1345 | { |
3900307b | 1346 | if (lock_count) |
62e76326 | 1347 | return 1; |
1348 | ||
3900307b | 1349 | if (swap_status == SWAPOUT_WRITING) |
62e76326 | 1350 | return 1; |
1351 | ||
3900307b | 1352 | if (store_status == STORE_PENDING) |
62e76326 | 1353 | return 1; |
1354 | ||
b8890359 | 1355 | /* |
1356 | * SPECIAL, PUBLIC entries should be "locked" | |
1357 | */ | |
3900307b | 1358 | if (EBIT_TEST(flags, ENTRY_SPECIAL)) |
1359 | if (!EBIT_TEST(flags, KEY_PRIVATE)) | |
62e76326 | 1360 | return 1; |
1361 | ||
30a4f2a8 | 1362 | return 0; |
090089c4 | 1363 | } |
1364 | ||
528b2c61 | 1365 | bool |
1366 | StoreEntry::validLength() const | |
6602e70e | 1367 | { |
47f6e231 | 1368 | int64_t diff; |
d8b249ef | 1369 | const HttpReply *reply; |
528b2c61 | 1370 | assert(mem_obj != NULL); |
1371 | reply = getReply(); | |
bf8fe701 | 1372 | debugs(20, 3, "storeEntryValidLength: Checking '" << getMD5Text() << "'"); |
e4049756 | 1373 | debugs(20, 5, "storeEntryValidLength: object_len = " << |
707fdc47 | 1374 | objectLen()); |
bf8fe701 | 1375 | debugs(20, 5, "storeEntryValidLength: hdr_sz = " << reply->hdr_sz); |
1376 | debugs(20, 5, "storeEntryValidLength: content_length = " << reply->content_length); | |
62e76326 | 1377 | |
d8b249ef | 1378 | if (reply->content_length < 0) { |
bf8fe701 | 1379 | debugs(20, 5, "storeEntryValidLength: Unspecified content length: " << getMD5Text()); |
62e76326 | 1380 | return 1; |
ffe4a367 | 1381 | } |
62e76326 | 1382 | |
07304bf9 | 1383 | if (reply->hdr_sz == 0) { |
bf8fe701 | 1384 | debugs(20, 5, "storeEntryValidLength: Zero header size: " << getMD5Text()); |
62e76326 | 1385 | return 1; |
ffe4a367 | 1386 | } |
62e76326 | 1387 | |
528b2c61 | 1388 | if (mem_obj->method == METHOD_HEAD) { |
bf8fe701 | 1389 | debugs(20, 5, "storeEntryValidLength: HEAD request: " << getMD5Text()); |
62e76326 | 1390 | return 1; |
ffe4a367 | 1391 | } |
62e76326 | 1392 | |
cb69b4c7 | 1393 | if (reply->sline.status == HTTP_NOT_MODIFIED) |
62e76326 | 1394 | return 1; |
1395 | ||
cb69b4c7 | 1396 | if (reply->sline.status == HTTP_NO_CONTENT) |
62e76326 | 1397 | return 1; |
1398 | ||
707fdc47 | 1399 | diff = reply->hdr_sz + reply->content_length - objectLen(); |
62e76326 | 1400 | |
ebf4efff | 1401 | if (diff == 0) |
62e76326 | 1402 | return 1; |
1403 | ||
bf8fe701 | 1404 | debugs(20, 3, "storeEntryValidLength: " << (diff < 0 ? -diff : diff) << " bytes too " << (diff < 0 ? "big" : "small") <<"; '" << getMD5Text() << "'" ); |
62e76326 | 1405 | |
ebf4efff | 1406 | return 0; |
ffe4a367 | 1407 | } |
6602e70e | 1408 | |
6b7d87bb FC |
1409 | static void |
1410 | storeRegisterWithCacheManager(void) | |
1411 | { | |
8822ebee AR |
1412 | Mgr::RegisterAction("storedir", "Store Directory Stats", Store::Stats, 0, 1); |
1413 | Mgr::RegisterAction("store_io", "Store IO Interface Stats", &Mgr::StoreIoAction::Create, 0, 1); | |
1414 | Mgr::RegisterAction("store_check_cachable_stats", "storeCheckCachable() Stats", | |
d9fc6862 | 1415 | storeCheckCachableStats, 0, 1); |
6b7d87bb FC |
1416 | } |
1417 | ||
b8d8561b | 1418 | void |
1419 | storeInit(void) | |
c943f331 | 1420 | { |
25535cbe | 1421 | storeKeyInit(); |
6a566b9c | 1422 | mem_policy = createRemovalPolicy(Config.memPolicy); |
8638fc66 | 1423 | storeDigestInit(); |
e3ef2b09 | 1424 | storeLogOpen(); |
e42d5181 | 1425 | eventAdd("storeLateRelease", storeLateRelease, NULL, 1.0, 1); |
c8f4eac4 | 1426 | Store::Root().init(); |
b2c141d4 | 1427 | storeRebuildStart(); |
d120ed12 FC |
1428 | |
1429 | storeRegisterWithCacheManager(); | |
62ee09ca | 1430 | } |
1431 | ||
b8d8561b | 1432 | void |
1433 | storeConfigure(void) | |
b1c0cc67 | 1434 | { |
c8f4eac4 | 1435 | store_swap_high = (long) (((float) Store::Root().maxSize() * |
62e76326 | 1436 | (float) Config.Swap.highWaterMark) / (float) 100); |
c8f4eac4 | 1437 | store_swap_low = (long) (((float) Store::Root().maxSize() * |
62e76326 | 1438 | (float) Config.Swap.lowWaterMark) / (float) 100); |
505d4821 | 1439 | store_pages_max = Config.memMaxSize / sizeof(mem_node); |
090089c4 | 1440 | } |
1441 | ||
9487bae9 AR |
1442 | bool |
1443 | StoreEntry::memoryCachable() const | |
56f29785 | 1444 | { |
3900307b | 1445 | if (mem_obj == NULL) |
62e76326 | 1446 | return 0; |
1447 | ||
3900307b | 1448 | if (mem_obj->data_hdr.size() == 0) |
62e76326 | 1449 | return 0; |
1450 | ||
19fdd3f3 | 1451 | if (mem_obj->inmem_lo != 0) |
e1381638 | 1452 | return 0; |
19fdd3f3 | 1453 | |
d227e181 | 1454 | if (!Config.onoff.memory_cache_first && swap_status == SWAPOUT_DONE && refcount == 1) |
e1381638 | 1455 | return 0; |
19fdd3f3 HN |
1456 | |
1457 | return 1; | |
56f29785 | 1458 | } |
1459 | ||
edce4d98 | 1460 | int |
3900307b | 1461 | StoreEntry::checkNegativeHit() const |
edce4d98 | 1462 | { |
3900307b | 1463 | if (!EBIT_TEST(flags, ENTRY_NEGCACHED)) |
62e76326 | 1464 | return 0; |
1465 | ||
3900307b | 1466 | if (expires <= squid_curtime) |
62e76326 | 1467 | return 0; |
1468 | ||
3900307b | 1469 | if (store_status != STORE_OK) |
62e76326 | 1470 | return 0; |
1471 | ||
edce4d98 | 1472 | return 1; |
1473 | } | |
1474 | ||
ac9cc053 AJ |
1475 | /** |
1476 | * Set object for negative caching. | |
1477 | * Preserves any expiry information given by the server. | |
1478 | * In absence of proper expiry info it will set to expire immediately, | |
1479 | * or with HTTP-violations enabled the configured negative-TTL is observed | |
1480 | */ | |
b8d8561b | 1481 | void |
d88e3c49 | 1482 | StoreEntry::negativeCache() |
79b5cc5f | 1483 | { |
da03a7e0 AJ |
1484 | // XXX: should make the default for expires 0 instead of -1 |
1485 | // so we can distinguish "Expires: -1" from nothing. | |
1486 | if (expires <= 0) | |
626096be | 1487 | #if USE_HTTP_VIOLATIONS |
ac9cc053 AJ |
1488 | expires = squid_curtime + Config.negativeTtl; |
1489 | #else | |
1490 | expires = squid_curtime; | |
1491 | #endif | |
d88e3c49 | 1492 | EBIT_SET(flags, ENTRY_NEGCACHED); |
79b5cc5f | 1493 | } |
0a21bd84 | 1494 | |
1495 | void | |
1496 | storeFreeMemory(void) | |
1497 | { | |
c8f4eac4 | 1498 | Store::Root(NULL); |
9bc73deb | 1499 | #if USE_CACHE_DIGESTS |
62e76326 | 1500 | |
8638fc66 | 1501 | if (store_digest) |
62e76326 | 1502 | cacheDigestDestroy(store_digest); |
1503 | ||
c68e9c6b | 1504 | #endif |
62e76326 | 1505 | |
8638fc66 | 1506 | store_digest = NULL; |
0a21bd84 | 1507 | } |
a7e59001 | 1508 | |
1509 | int | |
1510 | expiresMoreThan(time_t expires, time_t when) | |
1511 | { | |
c21ad0f5 | 1512 | if (expires < 0) /* No Expires given */ |
62e76326 | 1513 | return 1; |
1514 | ||
48f44632 | 1515 | return (expires > (squid_curtime + when)); |
a7e59001 | 1516 | } |
fe54d06d | 1517 | |
1518 | int | |
3900307b | 1519 | StoreEntry::validToSend() const |
fe54d06d | 1520 | { |
3900307b | 1521 | if (EBIT_TEST(flags, RELEASE_REQUEST)) |
62e76326 | 1522 | return 0; |
1523 | ||
3900307b | 1524 | if (EBIT_TEST(flags, ENTRY_NEGCACHED)) |
1525 | if (expires <= squid_curtime) | |
62e76326 | 1526 | return 0; |
1527 | ||
3900307b | 1528 | if (EBIT_TEST(flags, ENTRY_ABORTED)) |
62e76326 | 1529 | return 0; |
1530 | ||
fe54d06d | 1531 | return 1; |
1532 | } | |
62663274 | 1533 | |
ca98227c | 1534 | void |
3900307b | 1535 | StoreEntry::timestampsSet() |
ca98227c | 1536 | { |
3900307b | 1537 | const HttpReply *reply = getReply(); |
2f58241d | 1538 | time_t served_date = reply->date; |
a9925b40 | 1539 | int age = reply->header.getInt(HDR_AGE); |
31d36bfd | 1540 | /* Compute the timestamp, mimicking RFC2616 section 13.2.3. */ |
2f58241d | 1541 | /* make sure that 0 <= served_date <= squid_curtime */ |
62e76326 | 1542 | |
2f58241d | 1543 | if (served_date < 0 || served_date > squid_curtime) |
62e76326 | 1544 | served_date = squid_curtime; |
1545 | ||
525bf9dc BD |
1546 | /* Bug 1791: |
1547 | * If the returned Date: is more than 24 hours older than | |
1548 | * the squid_curtime, then one of us needs to use NTP to set our | |
1549 | * clock. We'll pretend that our clock is right. | |
1550 | */ | |
1551 | else if (served_date < (squid_curtime - 24 * 60 * 60) ) | |
1552 | served_date = squid_curtime; | |
62e76326 | 1553 | |
efd900cb | 1554 | /* |
212cbb48 | 1555 | * Compensate with Age header if origin server clock is ahead |
1556 | * of us and there is a cache in between us and the origin | |
1557 | * server. But DONT compensate if the age value is larger than | |
1558 | * squid_curtime because it results in a negative served_date. | |
efd900cb | 1559 | */ |
1560 | if (age > squid_curtime - served_date) | |
62e76326 | 1561 | if (squid_curtime > age) |
1562 | served_date = squid_curtime - age; | |
1563 | ||
31d36bfd AR |
1564 | // compensate for Squid-to-server and server-to-Squid delays |
1565 | if (mem_obj && mem_obj->request) { | |
1566 | const time_t request_sent = | |
1567 | mem_obj->request->hier.peer_http_request_sent.tv_sec; | |
1568 | if (0 < request_sent && request_sent < squid_curtime) | |
1569 | served_date -= (squid_curtime - request_sent); | |
1570 | } | |
1571 | ||
0d465a25 | 1572 | if (reply->expires > 0 && reply->date > -1) |
26ac0430 | 1573 | expires = served_date + (reply->expires - reply->date); |
0d465a25 | 1574 | else |
26ac0430 | 1575 | expires = reply->expires; |
62e76326 | 1576 | |
3900307b | 1577 | lastmod = reply->last_modified; |
62e76326 | 1578 | |
3900307b | 1579 | timestamp = served_date; |
ca98227c | 1580 | } |
429fdbec | 1581 | |
bfcaf585 | 1582 | void |
3900307b | 1583 | StoreEntry::registerAbort(STABH * cb, void *data) |
bfcaf585 | 1584 | { |
3900307b | 1585 | assert(mem_obj); |
1586 | assert(mem_obj->abort.callback == NULL); | |
1587 | mem_obj->abort.callback = cb; | |
8ea67c2b | 1588 | mem_obj->abort.data = cbdataReference(data); |
bfcaf585 | 1589 | } |
1590 | ||
1591 | void | |
3900307b | 1592 | StoreEntry::unregisterAbort() |
bfcaf585 | 1593 | { |
3900307b | 1594 | assert(mem_obj); |
8ea67c2b | 1595 | if (mem_obj->abort.callback) { |
26ac0430 AJ |
1596 | mem_obj->abort.callback = NULL; |
1597 | cbdataReferenceDone(mem_obj->abort.data); | |
8ea67c2b | 1598 | } |
bfcaf585 | 1599 | } |
88738790 | 1600 | |
f09f5b26 | 1601 | void |
3900307b | 1602 | StoreEntry::dump(int l) const |
1603 | { | |
bf8fe701 | 1604 | debugs(20, l, "StoreEntry->key: " << getMD5Text()); |
1605 | debugs(20, l, "StoreEntry->next: " << next); | |
1606 | debugs(20, l, "StoreEntry->mem_obj: " << mem_obj); | |
4a7a3d56 | 1607 | debugs(20, l, "StoreEntry->timestamp: " << timestamp); |
1608 | debugs(20, l, "StoreEntry->lastref: " << lastref); | |
1609 | debugs(20, l, "StoreEntry->expires: " << expires); | |
1610 | debugs(20, l, "StoreEntry->lastmod: " << lastmod); | |
1611 | debugs(20, l, "StoreEntry->swap_file_sz: " << swap_file_sz); | |
bf8fe701 | 1612 | debugs(20, l, "StoreEntry->refcount: " << refcount); |
1613 | debugs(20, l, "StoreEntry->flags: " << storeEntryFlags(this)); | |
4a7a3d56 | 1614 | debugs(20, l, "StoreEntry->swap_dirn: " << swap_dirn); |
1615 | debugs(20, l, "StoreEntry->swap_filen: " << swap_filen); | |
1616 | debugs(20, l, "StoreEntry->lock_count: " << lock_count); | |
1617 | debugs(20, l, "StoreEntry->mem_status: " << mem_status); | |
1618 | debugs(20, l, "StoreEntry->ping_status: " << ping_status); | |
1619 | debugs(20, l, "StoreEntry->store_status: " << store_status); | |
1620 | debugs(20, l, "StoreEntry->swap_status: " << swap_status); | |
d377699f | 1621 | } |
1622 | ||
1f38f50a | 1623 | /* |
1624 | * NOTE, this function assumes only two mem states | |
1625 | */ | |
f09f5b26 | 1626 | void |
3900307b | 1627 | StoreEntry::setMemStatus(mem_status_t new_status) |
8350fe9b | 1628 | { |
3900307b | 1629 | if (new_status == mem_status) |
62e76326 | 1630 | return; |
1631 | ||
6ebe9a4c AR |
1632 | // are we using a shared memory cache? |
1633 | if (Config.memShared && IamWorkerProcess()) { | |
c5426f8f AR |
1634 | // enumerate calling cases if shared memory is enabled |
1635 | assert(new_status != IN_MEMORY || EBIT_TEST(flags, ENTRY_SPECIAL)); | |
9487bae9 AR |
1636 | // This method was designed to update replacement policy, not to |
1637 | // actually purge something from the memory cache (TODO: rename?). | |
1638 | // Shared memory cache does not have a policy that needs updates. | |
1639 | mem_status = new_status; | |
1640 | return; | |
1641 | } | |
1642 | ||
3900307b | 1643 | assert(mem_obj != NULL); |
62e76326 | 1644 | |
b93bcace | 1645 | if (new_status == IN_MEMORY) { |
3900307b | 1646 | assert(mem_obj->inmem_lo == 0); |
62e76326 | 1647 | |
3900307b | 1648 | if (EBIT_TEST(flags, ENTRY_SPECIAL)) { |
bf8fe701 | 1649 | debugs(20, 4, "StoreEntry::setMemStatus: not inserting special " << mem_obj->url << " into policy"); |
62e76326 | 1650 | } else { |
3900307b | 1651 | mem_policy->Add(mem_policy, this, &mem_obj->repl); |
e2851fe7 | 1652 | debugs(20, 4, "StoreEntry::setMemStatus: inserted mem node " << mem_obj->url << " key: " << getMD5Text()); |
62e76326 | 1653 | } |
1654 | ||
5db6bf73 | 1655 | ++hot_obj_count; // TODO: maintain for the shared hot cache as well |
b93bcace | 1656 | } else { |
3900307b | 1657 | if (EBIT_TEST(flags, ENTRY_SPECIAL)) { |
bf8fe701 | 1658 | debugs(20, 4, "StoreEntry::setMemStatus: special entry " << mem_obj->url); |
62e76326 | 1659 | } else { |
3900307b | 1660 | mem_policy->Remove(mem_policy, this, &mem_obj->repl); |
bf8fe701 | 1661 | debugs(20, 4, "StoreEntry::setMemStatus: removed mem node " << mem_obj->url); |
62e76326 | 1662 | } |
1663 | ||
5e263176 | 1664 | --hot_obj_count; |
b93bcace | 1665 | } |
62e76326 | 1666 | |
3900307b | 1667 | mem_status = new_status; |
8350fe9b | 1668 | } |
6e86c3e8 | 1669 | |
9fb13bb6 | 1670 | const char * |
3900307b | 1671 | StoreEntry::url() const |
9fb13bb6 | 1672 | { |
3900307b | 1673 | if (this == NULL) |
62e76326 | 1674 | return "[null_entry]"; |
3900307b | 1675 | else if (mem_obj == NULL) |
62e76326 | 1676 | return "[null_mem_obj]"; |
9fb13bb6 | 1677 | else |
3900307b | 1678 | return mem_obj->url; |
9fb13bb6 | 1679 | } |
24ffafb4 | 1680 | |
1681 | void | |
d5f8d05f | 1682 | StoreEntry::createMemObject(const char *aUrl, const char *aLogUrl) |
24ffafb4 | 1683 | { |
3900307b | 1684 | if (mem_obj) |
62e76326 | 1685 | return; |
1686 | ||
9487bae9 AR |
1687 | if (hidden_mem_obj) { |
1688 | debugs(20, 3, HERE << "restoring " << hidden_mem_obj); | |
1689 | mem_obj = hidden_mem_obj; | |
1690 | hidden_mem_obj = NULL; | |
1691 | mem_obj->resetUrls(aUrl, aLogUrl); | |
1692 | return; | |
1693 | } | |
1694 | ||
d5f8d05f | 1695 | mem_obj = new MemObject(aUrl, aLogUrl); |
c21ad0f5 | 1696 | } |
1697 | ||
1698 | /* this just sets DELAY_SENDING */ | |
1699 | void | |
1700 | StoreEntry::buffer() | |
1701 | { | |
1702 | EBIT_SET(flags, DELAY_SENDING); | |
1703 | } | |
1704 | ||
438fc1e3 | 1705 | /* this just clears DELAY_SENDING and Invokes the handlers */ |
1706 | void | |
c21ad0f5 | 1707 | StoreEntry::flush() |
438fc1e3 | 1708 | { |
c21ad0f5 | 1709 | if (EBIT_TEST(flags, DELAY_SENDING)) { |
1710 | EBIT_CLR(flags, DELAY_SENDING); | |
d88e3c49 | 1711 | invokeHandlers(); |
b66315e4 | 1712 | } |
25535cbe | 1713 | } |
07304bf9 | 1714 | |
47f6e231 | 1715 | int64_t |
707fdc47 | 1716 | StoreEntry::objectLen() const |
07304bf9 | 1717 | { |
707fdc47 | 1718 | assert(mem_obj != NULL); |
1719 | return mem_obj->object_sz; | |
07304bf9 | 1720 | } |
1721 | ||
47f6e231 | 1722 | int64_t |
b37bde1e | 1723 | StoreEntry::contentLen() const |
07304bf9 | 1724 | { |
b37bde1e | 1725 | assert(mem_obj != NULL); |
1726 | assert(getReply() != NULL); | |
1727 | return objectLen() - getReply()->hdr_sz; | |
07304bf9 | 1728 | } |
f3986a15 | 1729 | |
528b2c61 | 1730 | HttpReply const * |
1731 | StoreEntry::getReply () const | |
f3986a15 | 1732 | { |
528b2c61 | 1733 | if (NULL == mem_obj) |
62e76326 | 1734 | return NULL; |
1735 | ||
528b2c61 | 1736 | return mem_obj->getReply(); |
f3986a15 | 1737 | } |
db1cd23c | 1738 | |
1739 | void | |
3900307b | 1740 | StoreEntry::reset() |
db1cd23c | 1741 | { |
3900307b | 1742 | assert (mem_obj); |
bf8fe701 | 1743 | debugs(20, 3, "StoreEntry::reset: " << url()); |
3900307b | 1744 | mem_obj->reset(); |
1745 | HttpReply *rep = (HttpReply *) getReply(); // bypass const | |
06a5ae20 | 1746 | rep->reset(); |
3900307b | 1747 | expires = lastmod = timestamp = -1; |
db1cd23c | 1748 | } |
2b906e48 | 1749 | |
cd748f27 | 1750 | /* |
1751 | * storeFsInit | |
1752 | * | |
1753 | * This routine calls the SETUP routine for each fs type. | |
1754 | * I don't know where the best place for this is, and I'm not going to shuffle | |
1755 | * around large chunks of code right now (that can be done once its working.) | |
1756 | */ | |
1757 | void | |
1758 | storeFsInit(void) | |
1759 | { | |
22d38e05 | 1760 | storeReplSetup(); |
cd748f27 | 1761 | } |
1762 | ||
22d38e05 | 1763 | /* |
1764 | * called to add another store removal policy module | |
1765 | */ | |
1766 | void | |
a2c963ae | 1767 | storeReplAdd(const char *type, REMOVALPOLICYCREATE * create) |
22d38e05 | 1768 | { |
1769 | int i; | |
62e76326 | 1770 | |
d64c1498 | 1771 | /* find the number of currently known repl types */ |
5db6bf73 | 1772 | for (i = 0; storerepl_list && storerepl_list[i].typestr; ++i) { |
d64c1498 | 1773 | if (strcmp(storerepl_list[i].typestr, type) == 0) { |
e0236918 | 1774 | debugs(20, DBG_IMPORTANT, "WARNING: Trying to load store replacement policy " << type << " twice."); |
d64c1498 AJ |
1775 | return; |
1776 | } | |
22d38e05 | 1777 | } |
62e76326 | 1778 | |
22d38e05 | 1779 | /* add the new type */ |
e6ccf245 | 1780 | storerepl_list = static_cast<storerepl_entry_t *>(xrealloc(storerepl_list, (i + 2) * sizeof(storerepl_entry_t))); |
62e76326 | 1781 | |
22d38e05 | 1782 | memset(&storerepl_list[i + 1], 0, sizeof(storerepl_entry_t)); |
62e76326 | 1783 | |
22d38e05 | 1784 | storerepl_list[i].typestr = type; |
62e76326 | 1785 | |
22d38e05 | 1786 | storerepl_list[i].create = create; |
1787 | } | |
1788 | ||
1789 | /* | |
1790 | * Create a removal policy instance | |
1791 | */ | |
1792 | RemovalPolicy * | |
1793 | createRemovalPolicy(RemovalPolicySettings * settings) | |
1794 | { | |
1795 | storerepl_entry_t *r; | |
62e76326 | 1796 | |
5db6bf73 | 1797 | for (r = storerepl_list; r && r->typestr; ++r) { |
62e76326 | 1798 | if (strcmp(r->typestr, settings->type) == 0) |
1799 | return r->create(settings->args); | |
22d38e05 | 1800 | } |
62e76326 | 1801 | |
e0236918 FC |
1802 | debugs(20, DBG_IMPORTANT, "ERROR: Unknown policy " << settings->type); |
1803 | debugs(20, DBG_IMPORTANT, "ERROR: Be sure to have set cache_replacement_policy"); | |
1804 | debugs(20, DBG_IMPORTANT, "ERROR: and memory_replacement_policy in squid.conf!"); | |
0c5ccf11 | 1805 | fatalf("ERROR: Unknown policy %s\n", settings->type); |
c21ad0f5 | 1806 | return NULL; /* NOTREACHED */ |
22d38e05 | 1807 | } |
1808 | ||
cd748f27 | 1809 | #if 0 |
fc8b9fc0 | 1810 | void |
1811 | storeSwapFileNumberSet(StoreEntry * e, sfileno filn) | |
1812 | { | |
1813 | if (e->swap_file_number == filn) | |
62e76326 | 1814 | return; |
1815 | ||
fc8b9fc0 | 1816 | if (filn < 0) { |
62e76326 | 1817 | assert(-1 == filn); |
1818 | storeDirMapBitReset(e->swap_file_number); | |
1819 | storeDirLRUDelete(e); | |
1820 | e->swap_file_number = -1; | |
fc8b9fc0 | 1821 | } else { |
62e76326 | 1822 | assert(-1 == e->swap_file_number); |
1823 | storeDirMapBitSet(e->swap_file_number = filn); | |
1824 | storeDirLRUAdd(e); | |
fc8b9fc0 | 1825 | } |
1826 | } | |
62e76326 | 1827 | |
cd748f27 | 1828 | #endif |
e6ccf245 | 1829 | |
db237875 | 1830 | /* |
1831 | * Replace a store entry with | |
528b2c61 | 1832 | * a new reply. This eats the reply. |
1833 | */ | |
4a56ee8d | 1834 | void |
3756e5c0 | 1835 | StoreEntry::replaceHttpReply(HttpReply *rep, bool andStartWriting) |
4a56ee8d | 1836 | { |
bf8fe701 | 1837 | debugs(20, 3, "StoreEntry::replaceHttpReply: " << url()); |
62e76326 | 1838 | |
4a56ee8d | 1839 | if (!mem_obj) { |
fa84c01d | 1840 | debugs(20, DBG_CRITICAL, "Attempt to replace object with no in-memory representation"); |
62e76326 | 1841 | return; |
528b2c61 | 1842 | } |
62e76326 | 1843 | |
4a56ee8d | 1844 | mem_obj->replaceHttpReply(rep); |
1845 | ||
3756e5c0 AR |
1846 | if (andStartWriting) |
1847 | startWriting(); | |
1848 | } | |
1849 | ||
3756e5c0 AR |
1850 | void |
1851 | StoreEntry::startWriting() | |
1852 | { | |
1853 | Packer p; | |
1854 | ||
528b2c61 | 1855 | /* TODO: when we store headers serparately remove the header portion */ |
1856 | /* TODO: mark the length of the headers ? */ | |
1857 | /* We ONLY want the headers */ | |
4a56ee8d | 1858 | packerToStoreInit(&p, this); |
62e76326 | 1859 | |
4a56ee8d | 1860 | assert (isEmpty()); |
3756e5c0 | 1861 | assert(mem_obj); |
9199139f | 1862 | |
3756e5c0 AR |
1863 | const HttpReply *rep = getReply(); |
1864 | assert(rep); | |
62e76326 | 1865 | |
3756e5c0 AR |
1866 | rep->packHeadersInto(&p); |
1867 | mem_obj->markEndOfReplyHeaders(); | |
62e76326 | 1868 | |
0521f8be | 1869 | rep->body.packInto(&p); |
62e76326 | 1870 | |
528b2c61 | 1871 | packerClean(&p); |
1872 | } | |
62e76326 | 1873 | |
528b2c61 | 1874 | char const * |
1875 | StoreEntry::getSerialisedMetaData() | |
1876 | { | |
1877 | StoreMeta *tlv_list = storeSwapMetaBuild(this); | |
1878 | int swap_hdr_sz; | |
1879 | char *result = storeSwapMetaPack(tlv_list, &swap_hdr_sz); | |
1880 | storeSwapTLVFree(tlv_list); | |
aa1a691e AR |
1881 | assert (swap_hdr_sz >= 0); |
1882 | mem_obj->swap_hdr_sz = (size_t) swap_hdr_sz; | |
528b2c61 | 1883 | return result; |
1884 | } | |
1885 | ||
528b2c61 | 1886 | void |
5b55f1f1 | 1887 | StoreEntry::trimMemory(const bool preserveSwappable) |
528b2c61 | 1888 | { |
7fef2365 | 1889 | /* |
1890 | * DPW 2007-05-09 | |
1891 | * Bug #1943. We must not let go any data for IN_MEMORY | |
1892 | * objects. We have to wait until the mem_status changes. | |
1893 | */ | |
1894 | if (mem_status == IN_MEMORY) | |
26ac0430 | 1895 | return; |
7fef2365 | 1896 | |
c5426f8f AR |
1897 | if (EBIT_TEST(flags, ENTRY_SPECIAL)) |
1898 | return; // cannot trim because we do not load them again | |
1899 | ||
5b55f1f1 | 1900 | if (!preserveSwappable) { |
e1381638 AJ |
1901 | if (mem_obj->policyLowestOffsetToKeep(0) == 0) { |
1902 | /* Nothing to do */ | |
1903 | return; | |
1904 | } | |
62e76326 | 1905 | /* |
1906 | * Its not swap-able, and we're about to delete a chunk, | |
1907 | * so we must make it PRIVATE. This is tricky/ugly because | |
1908 | * for the most part, we treat swapable == cachable here. | |
1909 | */ | |
d88e3c49 | 1910 | releaseRequest(); |
62e76326 | 1911 | mem_obj->trimUnSwappable (); |
528b2c61 | 1912 | } else { |
62e76326 | 1913 | mem_obj->trimSwappable (); |
528b2c61 | 1914 | } |
1915 | } | |
62e76326 | 1916 | |
0655fa4d | 1917 | bool |
190154cf | 1918 | StoreEntry::modifiedSince(HttpRequest * request) const |
0655fa4d | 1919 | { |
1920 | int object_length; | |
1921 | time_t mod_time = lastmod; | |
1922 | ||
1923 | if (mod_time < 0) | |
1924 | mod_time = timestamp; | |
1925 | ||
bf8fe701 | 1926 | debugs(88, 3, "modifiedSince: '" << url() << "'"); |
0655fa4d | 1927 | |
4a7a3d56 | 1928 | debugs(88, 3, "modifiedSince: mod_time = " << mod_time); |
0655fa4d | 1929 | |
1930 | if (mod_time < 0) | |
1931 | return true; | |
1932 | ||
1933 | /* Find size of the object */ | |
1934 | object_length = getReply()->content_length; | |
1935 | ||
1936 | if (object_length < 0) | |
b37bde1e | 1937 | object_length = contentLen(); |
0655fa4d | 1938 | |
1939 | if (mod_time > request->ims) { | |
bf8fe701 | 1940 | debugs(88, 3, "--> YES: entry newer than client"); |
0655fa4d | 1941 | return true; |
1942 | } else if (mod_time < request->ims) { | |
bf8fe701 | 1943 | debugs(88, 3, "--> NO: entry older than client"); |
0655fa4d | 1944 | return false; |
1945 | } else if (request->imslen < 0) { | |
bf8fe701 | 1946 | debugs(88, 3, "--> NO: same LMT, no client length"); |
0655fa4d | 1947 | return false; |
1948 | } else if (request->imslen == object_length) { | |
bf8fe701 | 1949 | debugs(88, 3, "--> NO: same LMT, same length"); |
0655fa4d | 1950 | return false; |
1951 | } else { | |
bf8fe701 | 1952 | debugs(88, 3, "--> YES: same LMT, different length"); |
0655fa4d | 1953 | return true; |
1954 | } | |
1955 | } | |
1956 | ||
79c8035e AR |
1957 | bool |
1958 | StoreEntry::hasIfMatchEtag(const HttpRequest &request) const | |
1959 | { | |
1960 | const String reqETags = request.header.getList(HDR_IF_MATCH); | |
1961 | return hasOneOfEtags(reqETags, false); | |
1962 | } | |
1963 | ||
1964 | bool | |
1965 | StoreEntry::hasIfNoneMatchEtag(const HttpRequest &request) const | |
1966 | { | |
1967 | const String reqETags = request.header.getList(HDR_IF_NONE_MATCH); | |
1968 | // weak comparison is allowed only for HEAD or full-body GET requests | |
1969 | const bool allowWeakMatch = !request.flags.range && | |
b59e6847 | 1970 | (request.method == METHOD_GET || request.method == METHOD_HEAD); |
79c8035e AR |
1971 | return hasOneOfEtags(reqETags, allowWeakMatch); |
1972 | } | |
1973 | ||
1974 | /// whether at least one of the request ETags matches entity ETag | |
1975 | bool | |
1976 | StoreEntry::hasOneOfEtags(const String &reqETags, const bool allowWeakMatch) const | |
1977 | { | |
1978 | const ETag repETag = getReply()->header.getETag(HDR_ETAG); | |
1979 | if (!repETag.str) | |
1980 | return strListIsMember(&reqETags, "*", ','); | |
1981 | ||
1982 | bool matched = false; | |
1983 | const char *pos = NULL; | |
1984 | const char *item; | |
1985 | int ilen; | |
1986 | while (!matched && strListGetItem(&reqETags, ',', &item, &ilen, &pos)) { | |
1987 | if (!strncmp(item, "*", ilen)) | |
1988 | matched = true; | |
1989 | else { | |
1990 | String str; | |
1991 | str.append(item, ilen); | |
1992 | ETag reqETag; | |
1993 | if (etagParseInit(&reqETag, str.termedBuf())) { | |
1994 | matched = allowWeakMatch ? etagIsWeakEqual(repETag, reqETag) : | |
b59e6847 | 1995 | etagIsStrongEqual(repETag, reqETag); |
79c8035e AR |
1996 | } |
1997 | } | |
1998 | } | |
1999 | return matched; | |
2000 | } | |
2001 | ||
7d3c4ca1 | 2002 | SwapDir::Pointer |
c8f4eac4 | 2003 | StoreEntry::store() const |
2004 | { | |
2005 | assert(0 <= swap_dirn && swap_dirn < Config.cacheSwap.n_configured); | |
2006 | return INDEXSD(swap_dirn); | |
2007 | } | |
2008 | ||
2009 | void | |
2010 | StoreEntry::unlink() | |
2011 | { | |
f58bb2f4 AR |
2012 | store()->unlink(*this); // implies disconnect() |
2013 | swap_filen = -1; | |
2014 | swap_dirn = -1; | |
2015 | swap_status = SWAPOUT_NONE; | |
c8f4eac4 | 2016 | } |
0655fa4d | 2017 | |
aa18a4ca | 2018 | /* |
2019 | * return true if the entry is in a state where | |
2020 | * it can accept more data (ie with write() method) | |
2021 | */ | |
2022 | bool | |
2023 | StoreEntry::isAccepting() const | |
2024 | { | |
2025 | if (STORE_PENDING != store_status) | |
2026 | return false; | |
2027 | ||
2028 | if (EBIT_TEST(flags, ENTRY_ABORTED)) | |
2029 | return false; | |
2030 | ||
2031 | return true; | |
2032 | } | |
2033 | ||
2c4cd1ad AR |
2034 | std::ostream &operator <<(std::ostream &os, const StoreEntry &e) |
2035 | { | |
2036 | return os << e.swap_filen << '@' << e.swap_dirn << '=' << | |
9199139f AR |
2037 | e.mem_status << '/' << e.ping_status << '/' << e.store_status << '/' << |
2038 | e.swap_status; | |
2c4cd1ad AR |
2039 | } |
2040 | ||
e6ccf245 | 2041 | /* NullStoreEntry */ |
2042 | ||
2043 | NullStoreEntry NullStoreEntry::_instance; | |
2044 | ||
2045 | NullStoreEntry * | |
2046 | NullStoreEntry::getInstance() | |
2047 | { | |
2048 | return &_instance; | |
2049 | } | |
332dafa2 | 2050 | |
2051 | char const * | |
2052 | NullStoreEntry::getMD5Text() const | |
2053 | { | |
2054 | return "N/A"; | |
2055 | } | |
528b2c61 | 2056 | |
43ae1d95 | 2057 | void |
2058 | NullStoreEntry::operator delete(void*) | |
2059 | { | |
2060 | fatal ("Attempt to delete NullStoreEntry\n"); | |
2061 | } | |
2062 | ||
528b2c61 | 2063 | char const * |
2064 | NullStoreEntry::getSerialisedMetaData() | |
2065 | { | |
2066 | return NULL; | |
2067 | } | |
2068 | ||
32d002cb | 2069 | #if !_USE_INLINE_ |
528b2c61 | 2070 | #include "Store.cci" |
2071 | #endif |