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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 | |
f7f3304a | 36 | #include "squid-old.h" |
ec20038e AJ |
37 | #include "CacheManager.h" |
38 | #include "comm/Connection.h" | |
81a94152 | 39 | #include "ETag.h" |
a553a5a3 | 40 | #include "event.h" |
04f55905 | 41 | #include "fde.h" |
e6ccf245 | 42 | #include "Store.h" |
8822ebee | 43 | #include "mgr/Registration.h" |
e6ccf245 | 44 | #include "StoreClient.h" |
528b2c61 | 45 | #include "stmem.h" |
46 | #include "HttpReply.h" | |
47 | #include "HttpRequest.h" | |
48 | #include "MemObject.h" | |
49 | #include "mem_node.h" | |
e4f1fdae | 50 | #include "StatCounters.h" |
528b2c61 | 51 | #include "StoreMeta.h" |
d3b3ab85 | 52 | #include "SwapDir.h" |
aa1a691e | 53 | #include "StoreIOState.h" |
9a0a18de | 54 | #if USE_DELAY_POOLS |
b67e2c8c | 55 | #include "DelayPools.h" |
56 | #endif | |
91caca83 | 57 | #include "Stack.h" |
985c86bc | 58 | #include "SquidTime.h" |
4b981814 | 59 | #include "swap_log_op.h" |
8822ebee | 60 | #include "mgr/StoreIoAction.h" |
090089c4 | 61 | |
528b2c61 | 62 | static STMCB storeWriteComplete; |
63 | ||
090089c4 | 64 | #define REBUILD_TIMESTAMP_DELTA_MAX 2 |
227fbb74 | 65 | |
c21ad0f5 | 66 | #define STORE_IN_MEM_BUCKETS (229) |
090089c4 | 67 | |
4b981814 AJ |
68 | |
69 | /** \todo Convert these string constants to enum string-arrays generated */ | |
70 | ||
26ac0430 AJ |
71 | const char *memStatusStr[] = { |
72 | "NOT_IN_MEMORY", | |
73 | "IN_MEMORY" | |
74 | }; | |
75 | ||
76 | const char *pingStatusStr[] = { | |
77 | "PING_NONE", | |
78 | "PING_WAITING", | |
79 | "PING_DONE" | |
80 | }; | |
81 | ||
82 | const char *storeStatusStr[] = { | |
83 | "STORE_OK", | |
84 | "STORE_PENDING" | |
85 | }; | |
86 | ||
87 | const char *swapStatusStr[] = { | |
88 | "SWAPOUT_NONE", | |
89 | "SWAPOUT_WRITING", | |
90 | "SWAPOUT_DONE" | |
91 | }; | |
9dfb6c1c | 92 | |
25b6a907 | 93 | |
94 | /* | |
95 | * This defines an repl type | |
96 | */ | |
97 | ||
98 | typedef struct _storerepl_entry storerepl_entry_t; | |
99 | ||
26ac0430 | 100 | struct _storerepl_entry { |
25b6a907 | 101 | const char *typestr; |
102 | REMOVALPOLICYCREATE *create; | |
103 | }; | |
104 | ||
105 | static storerepl_entry_t *storerepl_list = NULL; | |
106 | ||
107 | ||
e3ef2b09 | 108 | /* |
109 | * local function prototypes | |
110 | */ | |
007b8be4 | 111 | static int getKeyCounter(void); |
8423ff74 | 112 | static OBJH storeCheckCachableStats; |
e42d5181 | 113 | static EVH storeLateRelease; |
a21fbb54 | 114 | |
e3ef2b09 | 115 | /* |
116 | * local variables | |
117 | */ | |
91caca83 | 118 | static Stack<StoreEntry*> LateReleaseStack; |
04eb0689 | 119 | MemAllocator *StoreEntry::pool = NULL; |
e6ccf245 | 120 | |
c8f4eac4 | 121 | StorePointer Store::CurrentRoot = NULL; |
122 | ||
123 | void | |
124 | Store::Root(Store * aRoot) | |
125 | { | |
126 | CurrentRoot = aRoot; | |
127 | } | |
128 | ||
129 | void | |
130 | Store::Root(StorePointer aRoot) | |
131 | { | |
132 | Root(aRoot.getRaw()); | |
133 | } | |
134 | ||
135 | void | |
136 | Store::Stats(StoreEntry * output) | |
137 | { | |
138 | assert (output); | |
139 | Root().stat(*output); | |
140 | } | |
141 | ||
142 | void | |
143 | Store::create() | |
144 | {} | |
145 | ||
146 | void | |
147 | Store::diskFull() | |
148 | {} | |
149 | ||
150 | void | |
151 | Store::sync() | |
152 | {} | |
153 | ||
154 | void | |
155 | Store::unlink (StoreEntry &anEntry) | |
156 | { | |
157 | fatal("Store::unlink on invalid Store\n"); | |
158 | } | |
159 | ||
e6ccf245 | 160 | void * |
3b13a8fd | 161 | StoreEntry::operator new (size_t bytecount) |
e6ccf245 | 162 | { |
3b13a8fd | 163 | assert (bytecount == sizeof (StoreEntry)); |
62e76326 | 164 | |
e6ccf245 | 165 | if (!pool) { |
04eb0689 | 166 | pool = memPoolCreate ("StoreEntry", bytecount); |
b001e822 | 167 | pool->setChunkSize(2048 * 1024); |
e6ccf245 | 168 | } |
62e76326 | 169 | |
b001e822 | 170 | return pool->alloc(); |
e6ccf245 | 171 | } |
172 | ||
173 | void | |
3b13a8fd | 174 | StoreEntry::operator delete (void *address) |
e6ccf245 | 175 | { |
dc47f531 | 176 | pool->freeOne(address); |
e6ccf245 | 177 | } |
178 | ||
5ed72359 | 179 | void |
180 | StoreEntry::makePublic() | |
181 | { | |
182 | /* This object can be cached for a long time */ | |
183 | ||
184 | if (EBIT_TEST(flags, ENTRY_CACHABLE)) | |
d88e3c49 | 185 | setPublicKey(); |
5ed72359 | 186 | } |
187 | ||
188 | void | |
189 | StoreEntry::makePrivate() | |
190 | { | |
191 | /* This object should never be cached at all */ | |
d88e3c49 | 192 | expireNow(); |
193 | releaseRequest(); /* delete object when not used */ | |
194 | /* releaseRequest clears ENTRY_CACHABLE flag */ | |
5ed72359 | 195 | } |
196 | ||
197 | void | |
198 | StoreEntry::cacheNegatively() | |
199 | { | |
200 | /* This object may be negatively cached */ | |
d88e3c49 | 201 | negativeCache(); |
5ed72359 | 202 | |
203 | if (EBIT_TEST(flags, ENTRY_CACHABLE)) | |
d88e3c49 | 204 | setPublicKey(); |
5ed72359 | 205 | } |
206 | ||
e6ccf245 | 207 | size_t |
3b13a8fd | 208 | StoreEntry::inUseCount() |
e6ccf245 | 209 | { |
210 | if (!pool) | |
62e76326 | 211 | return 0; |
9f9e06f3 | 212 | return pool->getInUseCount(); |
e6ccf245 | 213 | } |
214 | ||
332dafa2 | 215 | const char * |
3b13a8fd | 216 | StoreEntry::getMD5Text() const |
332dafa2 | 217 | { |
218 | return storeKeyText((const cache_key *)key); | |
219 | } | |
220 | ||
a46d2c0e | 221 | #include "comm.h" |
222 | ||
223 | void | |
224 | StoreEntry::DeferReader(void *theContext, CommRead const &aRead) | |
e6ccf245 | 225 | { |
a46d2c0e | 226 | StoreEntry *anEntry = (StoreEntry *)theContext; |
3e4bebf8 | 227 | anEntry->delayAwareRead(aRead.conn, |
a46d2c0e | 228 | aRead.buf, |
229 | aRead.len, | |
65517dc8 | 230 | aRead.callback); |
e6ccf245 | 231 | } |
66cedb85 | 232 | |
a46d2c0e | 233 | void |
3e4bebf8 | 234 | StoreEntry::delayAwareRead(const Comm::ConnectionPointer &conn, char *buf, int len, AsyncCall::Pointer callback) |
a46d2c0e | 235 | { |
236 | size_t amountToRead = bytesWanted(Range<size_t>(0, len)); | |
237 | /* sketch: readdeferer* = getdeferer. | |
65517dc8 | 238 | * ->deferRead (fd, buf, len, callback, DelayAwareRead, this) |
a46d2c0e | 239 | */ |
240 | ||
241 | if (amountToRead == 0) { | |
242 | assert (mem_obj); | |
243 | /* read ahead limit */ | |
244 | /* Perhaps these two calls should both live in MemObject */ | |
9a0a18de | 245 | #if USE_DELAY_POOLS |
a46d2c0e | 246 | if (!mem_obj->readAheadPolicyCanRead()) { |
a5f42284 | 247 | #endif |
3e4bebf8 | 248 | mem_obj->delayRead(DeferredRead(DeferReader, this, CommRead(conn, buf, len, callback))); |
a46d2c0e | 249 | return; |
9a0a18de | 250 | #if USE_DELAY_POOLS |
a46d2c0e | 251 | } |
252 | ||
253 | /* delay id limit */ | |
3e4bebf8 | 254 | mem_obj->mostBytesAllowed().delayRead(DeferredRead(DeferReader, this, CommRead(conn, buf, len, callback))); |
a46d2c0e | 255 | return; |
a5f42284 | 256 | |
257 | #endif | |
258 | ||
a46d2c0e | 259 | } |
260 | ||
109cf61c | 261 | if (fd_table[conn->fd].closing()) { |
f5f9e44c AR |
262 | // Readers must have closing callbacks if they want to be notified. No |
263 | // readers appeared to care around 2009/12/14 as they skipped reading | |
264 | // for other reasons. Closing may already be true at the delyaAwareRead | |
265 | // call time or may happen while we wait after delayRead() above. | |
109cf61c | 266 | debugs(20, 3, HERE << "wont read from closing " << conn << " for " << |
f5f9e44c AR |
267 | callback); |
268 | return; // the read callback will never be called | |
269 | } | |
270 | ||
3e4bebf8 | 271 | comm_read(conn, buf, amountToRead, callback); |
a46d2c0e | 272 | } |
273 | ||
274 | size_t | |
384a7590 | 275 | StoreEntry::bytesWanted (Range<size_t> const aRange, bool ignoreDelayPools) const |
528b2c61 | 276 | { |
528b2c61 | 277 | if (mem_obj == NULL) |
4dc2b072 | 278 | return aRange.end; |
62e76326 | 279 | |
bc87dc25 | 280 | #if URL_CHECKSUM_DEBUG |
62e76326 | 281 | |
528b2c61 | 282 | mem_obj->checkUrlChecksum(); |
62e76326 | 283 | |
528b2c61 | 284 | #endif |
62e76326 | 285 | |
a46d2c0e | 286 | if (!mem_obj->readAheadPolicyCanRead()) |
287 | return 0; | |
62e76326 | 288 | |
384a7590 | 289 | return mem_obj->mostBytesWanted(aRange.end, ignoreDelayPools); |
a46d2c0e | 290 | } |
62e76326 | 291 | |
a46d2c0e | 292 | bool |
293 | StoreEntry::checkDeferRead(int fd) const | |
294 | { | |
295 | return (bytesWanted(Range<size_t>(0,INT_MAX)) == 0); | |
296 | } | |
62e76326 | 297 | |
a46d2c0e | 298 | void |
299 | StoreEntry::setNoDelay (bool const newValue) | |
300 | { | |
301 | if (mem_obj) | |
302 | mem_obj->setNoDelay(newValue); | |
528b2c61 | 303 | } |
bc87dc25 | 304 | |
528b2c61 | 305 | store_client_t |
306 | StoreEntry::storeClientType() const | |
227fbb74 | 307 | { |
7d31d5fa | 308 | /* The needed offset isn't in memory |
309 | * XXX TODO: this is wrong for range requests | |
310 | * as the needed offset may *not* be 0, AND | |
311 | * offset 0 in the memory object is the HTTP headers. | |
312 | */ | |
313 | ||
a2c86cbd | 314 | if (mem_status == IN_MEMORY && Config.memShared && IamWorkerProcess()) { |
9487bae9 AR |
315 | // clients of an object cached in shared memory are memory clients |
316 | return STORE_MEM_CLIENT; | |
317 | } | |
318 | ||
319 | assert(mem_obj); | |
320 | ||
528b2c61 | 321 | if (mem_obj->inmem_lo) |
62e76326 | 322 | return STORE_DISK_CLIENT; |
323 | ||
528b2c61 | 324 | if (EBIT_TEST(flags, ENTRY_ABORTED)) { |
62e76326 | 325 | /* I don't think we should be adding clients to aborted entries */ |
bf8fe701 | 326 | debugs(20, 1, "storeClientType: adding to ENTRY_ABORTED entry"); |
62e76326 | 327 | return STORE_MEM_CLIENT; |
528b2c61 | 328 | } |
62e76326 | 329 | |
528b2c61 | 330 | if (store_status == STORE_OK) { |
7d31d5fa | 331 | /* the object has completed. */ |
332 | ||
344a9006 | 333 | if (mem_obj->inmem_lo == 0 && !isEmpty()) { |
47ce0a58 | 334 | if (swap_status == SWAPOUT_DONE) { |
e2851fe7 | 335 | debugs(20,7, HERE << mem_obj << " lo: " << mem_obj->inmem_lo << " hi: " << mem_obj->endOffset() << " size: " << mem_obj->object_sz); |
e1381638 AJ |
336 | if (mem_obj->endOffset() == mem_obj->object_sz) { |
337 | /* hot object fully swapped in */ | |
338 | return STORE_MEM_CLIENT; | |
339 | } | |
47ce0a58 | 340 | } else { |
e1381638 AJ |
341 | /* Memory-only, or currently being swapped out */ |
342 | return STORE_MEM_CLIENT; | |
47ce0a58 HN |
343 | } |
344 | } | |
345 | return STORE_DISK_CLIENT; | |
528b2c61 | 346 | } |
62e76326 | 347 | |
528b2c61 | 348 | /* here and past, entry is STORE_PENDING */ |
349 | /* | |
350 | * If this is the first client, let it be the mem client | |
351 | */ | |
352 | if (mem_obj->nclients == 1) | |
62e76326 | 353 | return STORE_MEM_CLIENT; |
354 | ||
528b2c61 | 355 | /* |
356 | * If there is no disk file to open yet, we must make this a | |
357 | * mem client. If we can't open the swapin file before writing | |
358 | * to the client, there is no guarantee that we will be able | |
359 | * to open it later when we really need it. | |
360 | */ | |
361 | if (swap_status == SWAPOUT_NONE) | |
62e76326 | 362 | return STORE_MEM_CLIENT; |
363 | ||
528b2c61 | 364 | /* |
365 | * otherwise, make subsequent clients read from disk so they | |
366 | * can not delay the first, and vice-versa. | |
367 | */ | |
368 | return STORE_DISK_CLIENT; | |
227fbb74 | 369 | } |
370 | ||
e2851fe7 | 371 | StoreEntry::StoreEntry(): |
9487bae9 | 372 | hidden_mem_obj(NULL), |
e2851fe7 | 373 | swap_file_sz(0) |
090089c4 | 374 | { |
59dbbc5c | 375 | debugs(20, 3, HERE << "new StoreEntry " << this); |
c8f4eac4 | 376 | mem_obj = NULL; |
62e76326 | 377 | |
c8f4eac4 | 378 | expires = lastmod = lastref = timestamp = -1; |
62e76326 | 379 | |
f58bb2f4 | 380 | swap_status = SWAPOUT_NONE; |
c8f4eac4 | 381 | swap_filen = -1; |
382 | swap_dirn = -1; | |
383 | } | |
62e76326 | 384 | |
e2851fe7 | 385 | StoreEntry::StoreEntry(const char *aUrl, const char *aLogUrl): |
9487bae9 | 386 | hidden_mem_obj(NULL), |
e2851fe7 | 387 | swap_file_sz(0) |
c8f4eac4 | 388 | { |
59dbbc5c | 389 | debugs(20, 3, HERE << "new StoreEntry " << this); |
d5f8d05f | 390 | mem_obj = new MemObject(aUrl, aLogUrl); |
62e76326 | 391 | |
c8f4eac4 | 392 | expires = lastmod = lastref = timestamp = -1; |
393 | ||
f58bb2f4 | 394 | swap_status = SWAPOUT_NONE; |
c8f4eac4 | 395 | swap_filen = -1; |
396 | swap_dirn = -1; | |
090089c4 | 397 | } |
398 | ||
6d8d05b5 DK |
399 | StoreEntry::~StoreEntry() |
400 | { | |
401 | if (swap_filen >= 0) { | |
f58bb2f4 AR |
402 | SwapDir &sd = dynamic_cast<SwapDir&>(*store()); |
403 | sd.disconnect(*this); | |
6d8d05b5 | 404 | } |
9487bae9 | 405 | delete hidden_mem_obj; |
6d8d05b5 DK |
406 | } |
407 | ||
0ad2b63b CT |
408 | #if USE_ADAPTATION |
409 | void | |
410 | StoreEntry::deferProducer(const AsyncCall::Pointer &producer) | |
411 | { | |
412 | if (!deferredProducer) | |
413 | deferredProducer = producer; | |
414 | else | |
e83cdc25 | 415 | debugs(20, 5, HERE << "Deferred producer call is allready set to: " << |
0ad2b63b CT |
416 | *deferredProducer << ", requested call: " << *producer); |
417 | } | |
418 | ||
419 | void | |
420 | StoreEntry::kickProducer() | |
421 | { | |
e83cdc25 | 422 | if (deferredProducer != NULL) { |
0ad2b63b CT |
423 | ScheduleCallHere(deferredProducer); |
424 | deferredProducer = NULL; | |
425 | } | |
426 | } | |
427 | #endif | |
428 | ||
3900307b | 429 | void |
430 | StoreEntry::destroyMemObject() | |
090089c4 | 431 | { |
3900307b | 432 | debugs(20, 3, HERE << "destroyMemObject " << mem_obj); |
433 | setMemStatus(NOT_IN_MEMORY); | |
434 | MemObject *mem = mem_obj; | |
435 | mem_obj = NULL; | |
528b2c61 | 436 | delete mem; |
9487bae9 AR |
437 | delete hidden_mem_obj; |
438 | hidden_mem_obj = NULL; | |
439 | } | |
440 | ||
441 | void | |
442 | StoreEntry::hideMemObject() | |
443 | { | |
444 | debugs(20, 3, HERE << "hiding " << mem_obj); | |
445 | assert(mem_obj); | |
446 | assert(!hidden_mem_obj); | |
447 | hidden_mem_obj = mem_obj; | |
448 | mem_obj = NULL; | |
090089c4 | 449 | } |
450 | ||
c8f4eac4 | 451 | void |
528b2c61 | 452 | destroyStoreEntry(void *data) |
090089c4 | 453 | { |
59dbbc5c | 454 | debugs(20, 3, HERE << "destroyStoreEntry: destroying " << data); |
c8f4eac4 | 455 | StoreEntry *e = static_cast<StoreEntry *>(static_cast<hash_link *>(data)); |
9e975e4e | 456 | assert(e != NULL); |
62e76326 | 457 | |
e6ccf245 | 458 | if (e == NullStoreEntry::getInstance()) |
62e76326 | 459 | return; |
460 | ||
3900307b | 461 | e->destroyMemObject(); |
62e76326 | 462 | |
3900307b | 463 | e->hashDelete(); |
62e76326 | 464 | |
332dafa2 | 465 | assert(e->key == NULL); |
62e76326 | 466 | |
e6ccf245 | 467 | delete e; |
227fbb74 | 468 | } |
090089c4 | 469 | |
090089c4 | 470 | /* ----- INTERFACE BETWEEN STORAGE MANAGER AND HASH TABLE FUNCTIONS --------- */ |
471 | ||
f09f5b26 | 472 | void |
3900307b | 473 | StoreEntry::hashInsert(const cache_key * someKey) |
090089c4 | 474 | { |
bf8fe701 | 475 | debugs(20, 3, "StoreEntry::hashInsert: Inserting Entry " << this << " key '" << storeKeyText(someKey) << "'"); |
3900307b | 476 | key = storeKeyDup(someKey); |
477 | hash_join(store_table, this); | |
090089c4 | 478 | } |
479 | ||
3900307b | 480 | void |
481 | StoreEntry::hashDelete() | |
090089c4 | 482 | { |
3900307b | 483 | hash_remove_link(store_table, this); |
484 | storeKeyFree((const cache_key *)key); | |
485 | key = NULL; | |
090089c4 | 486 | } |
487 | ||
090089c4 | 488 | /* -------------------------------------------------------------------------- */ |
489 | ||
090089c4 | 490 | |
491 | /* get rid of memory copy of the object */ | |
d88e3c49 | 492 | void |
493 | StoreEntry::purgeMem() | |
090089c4 | 494 | { |
d88e3c49 | 495 | if (mem_obj == NULL) |
62e76326 | 496 | return; |
497 | ||
bf8fe701 | 498 | debugs(20, 3, "StoreEntry::purgeMem: Freeing memory-copy of " << getMD5Text()); |
62e76326 | 499 | |
3900307b | 500 | destroyMemObject(); |
62e76326 | 501 | |
d88e3c49 | 502 | if (swap_status != SWAPOUT_DONE) |
503 | release(); | |
090089c4 | 504 | } |
505 | ||
c8f4eac4 | 506 | /* RBC 20050104 this is wrong- memory ref counting |
507 | * is not at all equivalent to the store 'usage' concept | |
508 | * which the replacement policies should be acting upon. | |
509 | * specifically, object iteration within stores needs | |
510 | * memory ref counting to prevent race conditions, | |
511 | * but this should not influence store replacement. | |
512 | */ | |
6a566b9c | 513 | void |
c21ad0f5 | 514 | |
515 | StoreEntry::lock() | |
6a566b9c | 516 | { |
5db6bf73 | 517 | ++lock_count; |
34266cde | 518 | debugs(20, 3, "StoreEntry::lock: key '" << getMD5Text() <<"' count=" << |
bf8fe701 | 519 | lock_count ); |
c21ad0f5 | 520 | lastref = squid_curtime; |
521 | Store::Root().reference(*this); | |
090089c4 | 522 | } |
523 | ||
43ae1d95 | 524 | void |
525 | StoreEntry::setReleaseFlag() | |
526 | { | |
527 | if (EBIT_TEST(flags, RELEASE_REQUEST)) | |
528 | return; | |
529 | ||
bf8fe701 | 530 | debugs(20, 3, "StoreEntry::setReleaseFlag: '" << getMD5Text() << "'"); |
43ae1d95 | 531 | |
532 | EBIT_SET(flags, RELEASE_REQUEST); | |
533 | } | |
534 | ||
b8d8561b | 535 | void |
d88e3c49 | 536 | StoreEntry::releaseRequest() |
2285407f | 537 | { |
d88e3c49 | 538 | if (EBIT_TEST(flags, RELEASE_REQUEST)) |
62e76326 | 539 | return; |
540 | ||
d88e3c49 | 541 | setReleaseFlag(); |
62e76326 | 542 | |
f3e570e9 | 543 | /* |
544 | * Clear cachable flag here because we might get called before | |
545 | * anyone else even looks at the cachability flag. Also, this | |
546 | * prevents httpMakePublic from really setting a public key. | |
547 | */ | |
d88e3c49 | 548 | EBIT_CLR(flags, ENTRY_CACHABLE); |
62e76326 | 549 | |
d88e3c49 | 550 | setPrivateKey(); |
2285407f | 551 | } |
552 | ||
090089c4 | 553 | /* unlock object, return -1 if object get released after unlock |
554 | * otherwise lock_count */ | |
b8d8561b | 555 | int |
c21ad0f5 | 556 | StoreEntry::unlock() |
090089c4 | 557 | { |
c21ad0f5 | 558 | lock_count--; |
bf8fe701 | 559 | debugs(20, 3, "StoreEntry::unlock: key '" << getMD5Text() << "' count=" << lock_count); |
62e76326 | 560 | |
c21ad0f5 | 561 | if (lock_count) |
562 | return (int) lock_count; | |
62e76326 | 563 | |
c21ad0f5 | 564 | if (store_status == STORE_PENDING) |
565 | setReleaseFlag(); | |
62e76326 | 566 | |
c21ad0f5 | 567 | assert(storePendingNClients(this) == 0); |
62e76326 | 568 | |
9199139f | 569 | if (EBIT_TEST(flags, RELEASE_REQUEST)) { |
5f33b71d | 570 | this->release(); |
984f9874 AR |
571 | return 0; |
572 | } | |
573 | ||
9487bae9 AR |
574 | if (EBIT_TEST(flags, KEY_PRIVATE)) |
575 | debugs(20, 1, "WARNING: " << __FILE__ << ":" << __LINE__ << ": found KEY_PRIVATE"); | |
62e76326 | 576 | |
9487bae9 | 577 | Store::Root().handleIdleEntry(*this); // may delete us |
6c895381 | 578 | return 0; |
090089c4 | 579 | } |
580 | ||
e6ccf245 | 581 | void |
60745f24 | 582 | StoreEntry::getPublicByRequestMethod (StoreClient *aClient, HttpRequest * request, const HttpRequestMethod& method) |
e6ccf245 | 583 | { |
584 | assert (aClient); | |
3b13a8fd | 585 | StoreEntry *result = storeGetPublicByRequestMethod( request, method); |
62e76326 | 586 | |
e6ccf245 | 587 | if (!result) |
62e76326 | 588 | aClient->created (NullStoreEntry::getInstance()); |
e6ccf245 | 589 | else |
62e76326 | 590 | aClient->created (result); |
e6ccf245 | 591 | } |
592 | ||
593 | void | |
190154cf | 594 | StoreEntry::getPublicByRequest (StoreClient *aClient, HttpRequest * request) |
e6ccf245 | 595 | { |
596 | assert (aClient); | |
3b13a8fd | 597 | StoreEntry *result = storeGetPublicByRequest (request); |
62e76326 | 598 | |
e6ccf245 | 599 | if (!result) |
62e76326 | 600 | result = NullStoreEntry::getInstance(); |
601 | ||
e6ccf245 | 602 | aClient->created (result); |
603 | } | |
604 | ||
605 | void | |
60745f24 | 606 | StoreEntry::getPublic (StoreClient *aClient, const char *uri, const HttpRequestMethod& method) |
e6ccf245 | 607 | { |
608 | assert (aClient); | |
3b13a8fd | 609 | StoreEntry *result = storeGetPublic (uri, method); |
62e76326 | 610 | |
e6ccf245 | 611 | if (!result) |
62e76326 | 612 | result = NullStoreEntry::getInstance(); |
613 | ||
e6ccf245 | 614 | aClient->created (result); |
615 | } | |
616 | ||
08e5d64f | 617 | StoreEntry * |
60745f24 | 618 | storeGetPublic(const char *uri, const HttpRequestMethod& method) |
08e5d64f | 619 | { |
c8f4eac4 | 620 | return Store::Root().get(storeKeyPublic(uri, method)); |
08e5d64f | 621 | } |
622 | ||
f66a9ef4 | 623 | StoreEntry * |
60745f24 | 624 | storeGetPublicByRequestMethod(HttpRequest * req, const HttpRequestMethod& method) |
f66a9ef4 | 625 | { |
c8f4eac4 | 626 | return Store::Root().get(storeKeyPublicByRequestMethod(req, method)); |
f66a9ef4 | 627 | } |
628 | ||
629 | StoreEntry * | |
190154cf | 630 | storeGetPublicByRequest(HttpRequest * req) |
f66a9ef4 | 631 | { |
632 | StoreEntry *e = storeGetPublicByRequestMethod(req, req->method); | |
62e76326 | 633 | |
f66a9ef4 | 634 | if (e == NULL && req->method == METHOD_HEAD) |
62e76326 | 635 | /* We can generate a HEAD reply from a cached GET object */ |
636 | e = storeGetPublicByRequestMethod(req, METHOD_GET); | |
637 | ||
f66a9ef4 | 638 | return e; |
639 | } | |
640 | ||
007b8be4 | 641 | static int |
642 | getKeyCounter(void) | |
04e8dbaa | 643 | { |
007b8be4 | 644 | static int key_counter = 0; |
62e76326 | 645 | |
007b8be4 | 646 | if (++key_counter < 0) |
62e76326 | 647 | key_counter = 1; |
648 | ||
007b8be4 | 649 | return key_counter; |
04e8dbaa | 650 | } |
651 | ||
c8f4eac4 | 652 | /* RBC 20050104 AFAICT this should become simpler: |
653 | * rather than reinserting with a special key it should be marked | |
654 | * as 'released' and then cleaned up when refcounting indicates. | |
655 | * the StoreHashIndex could well implement its 'released' in the | |
656 | * current manner. | |
657 | * Also, clean log writing should skip over ia,t | |
658 | * Otherwise, we need a 'remove from the index but not the store | |
659 | * concept'. | |
660 | */ | |
6c57e268 | 661 | void |
d88e3c49 | 662 | StoreEntry::setPrivateKey() |
227fbb74 | 663 | { |
9fb13bb6 | 664 | const cache_key *newkey; |
62e76326 | 665 | |
d88e3c49 | 666 | if (key && EBIT_TEST(flags, KEY_PRIVATE)) |
c21ad0f5 | 667 | return; /* is already private */ |
62e76326 | 668 | |
d88e3c49 | 669 | if (key) { |
670 | if (swap_filen > -1) | |
671 | storeDirSwapLog(this, SWAP_LOG_DEL); | |
62e76326 | 672 | |
3900307b | 673 | hashDelete(); |
b109de6b | 674 | } |
62e76326 | 675 | |
d88e3c49 | 676 | if (mem_obj != NULL) { |
677 | mem_obj->id = getKeyCounter(); | |
678 | newkey = storeKeyPrivate(mem_obj->url, mem_obj->method, mem_obj->id); | |
9fb13bb6 | 679 | } else { |
62e76326 | 680 | newkey = storeKeyPrivate("JUNK", METHOD_NONE, getKeyCounter()); |
9fb13bb6 | 681 | } |
62e76326 | 682 | |
9fb13bb6 | 683 | assert(hash_lookup(store_table, newkey) == NULL); |
d88e3c49 | 684 | EBIT_SET(flags, KEY_PRIVATE); |
3900307b | 685 | hashInsert(newkey); |
227fbb74 | 686 | } |
687 | ||
b8d8561b | 688 | void |
d88e3c49 | 689 | StoreEntry::setPublicKey() |
227fbb74 | 690 | { |
6eb42cae | 691 | StoreEntry *e2 = NULL; |
9fb13bb6 | 692 | const cache_key *newkey; |
62e76326 | 693 | |
d88e3c49 | 694 | if (key && !EBIT_TEST(flags, KEY_PRIVATE)) |
c21ad0f5 | 695 | return; /* is already public */ |
62e76326 | 696 | |
d88e3c49 | 697 | assert(mem_obj); |
62e76326 | 698 | |
f3e570e9 | 699 | /* |
700 | * We can't make RELEASE_REQUEST objects public. Depending on | |
701 | * when RELEASE_REQUEST gets set, we might not be swapping out | |
702 | * the object. If we're not swapping out, then subsequent | |
703 | * store clients won't be able to access object data which has | |
704 | * been freed from memory. | |
d87ebd78 | 705 | * |
706 | * If RELEASE_REQUEST is set, then ENTRY_CACHABLE should not | |
d88e3c49 | 707 | * be set, and StoreEntry::setPublicKey() should not be called. |
f3e570e9 | 708 | */ |
6a566b9c | 709 | #if MORE_DEBUG_OUTPUT |
62e76326 | 710 | |
d88e3c49 | 711 | if (EBIT_TEST(flags, RELEASE_REQUEST)) |
308652fc | 712 | debugs(20, 1, "assertion failed: RELEASE key " << key << ", url " << mem_obj->url); |
62e76326 | 713 | |
2b906e48 | 714 | #endif |
62e76326 | 715 | |
d88e3c49 | 716 | assert(!EBIT_TEST(flags, RELEASE_REQUEST)); |
62e76326 | 717 | |
d88e3c49 | 718 | if (mem_obj->request) { |
719 | HttpRequest *request = mem_obj->request; | |
62e76326 | 720 | |
d88e3c49 | 721 | if (!mem_obj->vary_headers) { |
62e76326 | 722 | /* First handle the case where the object no longer varies */ |
723 | safe_free(request->vary_headers); | |
724 | } else { | |
d88e3c49 | 725 | if (request->vary_headers && strcmp(request->vary_headers, mem_obj->vary_headers) != 0) { |
62e76326 | 726 | /* Oops.. the variance has changed. Kill the base object |
727 | * to record the new variance key | |
728 | */ | |
c21ad0f5 | 729 | safe_free(request->vary_headers); /* free old "bad" variance key */ |
d88e3c49 | 730 | StoreEntry *pe = storeGetPublic(mem_obj->url, mem_obj->method); |
62e76326 | 731 | |
732 | if (pe) | |
5f33b71d | 733 | pe->release(); |
62e76326 | 734 | } |
735 | ||
736 | /* Make sure the request knows the variance status */ | |
737 | if (!request->vary_headers) { | |
d88e3c49 | 738 | const char *vary = httpMakeVaryMark(request, mem_obj->getReply()); |
62e76326 | 739 | |
740 | if (vary) | |
741 | request->vary_headers = xstrdup(vary); | |
742 | } | |
743 | } | |
744 | ||
9487bae9 AR |
745 | // TODO: storeGetPublic() calls below may create unlocked entries. |
746 | // We should add/use storeHas() API or lock/unlock those entries. | |
d88e3c49 | 747 | if (mem_obj->vary_headers && !storeGetPublic(mem_obj->url, mem_obj->method)) { |
62e76326 | 748 | /* Create "vary" base object */ |
30abd221 | 749 | String vary; |
d88e3c49 | 750 | StoreEntry *pe = storeCreateEntry(mem_obj->url, mem_obj->log_url, request->flags, request->method); |
62e76326 | 751 | /* We are allowed to do this typecast */ |
eab8dcfa | 752 | HttpReply *rep = new HttpReply; |
11992b6f | 753 | rep->setHeaders(HTTP_OK, "Internal marker object", "x-squid-internal/vary", -1, -1, squid_curtime + 100000); |
d88e3c49 | 754 | vary = mem_obj->getReply()->header.getList(HDR_VARY); |
62e76326 | 755 | |
30abd221 | 756 | if (vary.size()) { |
62e76326 | 757 | /* Again, we own this structure layout */ |
b4f2886c | 758 | rep->header.putStr(HDR_VARY, vary.termedBuf()); |
30abd221 | 759 | vary.clean(); |
62e76326 | 760 | } |
761 | ||
f66a9ef4 | 762 | #if X_ACCELERATOR_VARY |
d88e3c49 | 763 | vary = mem_obj->getReply()->header.getList(HDR_X_ACCELERATOR_VARY); |
62e76326 | 764 | |
b4197865 | 765 | if (vary.defined()) { |
62e76326 | 766 | /* Again, we own this structure layout */ |
b4197865 | 767 | rep->header.putStr(HDR_X_ACCELERATOR_VARY, vary.termedBuf()); |
30abd221 | 768 | vary.clean(); |
62e76326 | 769 | } |
770 | ||
f66a9ef4 | 771 | #endif |
eab8dcfa | 772 | pe->replaceHttpReply(rep); |
62e76326 | 773 | |
3900307b | 774 | pe->timestampsSet(); |
ba27c9a0 | 775 | |
eab8dcfa | 776 | pe->makePublic(); |
62e76326 | 777 | |
62e76326 | 778 | pe->complete(); |
eab8dcfa | 779 | |
97b5e68f | 780 | pe->unlock(); |
62e76326 | 781 | } |
782 | ||
d88e3c49 | 783 | newkey = storeKeyPublicByRequest(mem_obj->request); |
f66a9ef4 | 784 | } else |
d88e3c49 | 785 | newkey = storeKeyPublic(mem_obj->url, mem_obj->method); |
62e76326 | 786 | |
9fb13bb6 | 787 | if ((e2 = (StoreEntry *) hash_lookup(store_table, newkey))) { |
bf8fe701 | 788 | debugs(20, 3, "StoreEntry::setPublicKey: Making old '" << mem_obj->url << "' private."); |
d88e3c49 | 789 | e2->setPrivateKey(); |
5f33b71d | 790 | e2->release(); |
62e76326 | 791 | |
d88e3c49 | 792 | if (mem_obj->request) |
793 | newkey = storeKeyPublicByRequest(mem_obj->request); | |
62e76326 | 794 | else |
d88e3c49 | 795 | newkey = storeKeyPublic(mem_obj->url, mem_obj->method); |
6eb42cae | 796 | } |
62e76326 | 797 | |
d88e3c49 | 798 | if (key) |
3900307b | 799 | hashDelete(); |
62e76326 | 800 | |
d88e3c49 | 801 | EBIT_CLR(flags, KEY_PRIVATE); |
62e76326 | 802 | |
3900307b | 803 | hashInsert(newkey); |
62e76326 | 804 | |
d88e3c49 | 805 | if (swap_filen > -1) |
806 | storeDirSwapLog(this, SWAP_LOG_ADD); | |
227fbb74 | 807 | } |
808 | ||
b8d8561b | 809 | StoreEntry * |
60745f24 | 810 | storeCreateEntry(const char *url, const char *log_url, request_flags flags, const HttpRequestMethod& method) |
090089c4 | 811 | { |
090089c4 | 812 | StoreEntry *e = NULL; |
30a4f2a8 | 813 | MemObject *mem = NULL; |
bf8fe701 | 814 | debugs(20, 3, "storeCreateEntry: '" << url << "'"); |
090089c4 | 815 | |
c8f4eac4 | 816 | e = new StoreEntry(url, log_url); |
c21ad0f5 | 817 | e->lock_count = 1; /* Note lock here w/o calling storeLock() */ |
30a4f2a8 | 818 | mem = e->mem_obj; |
2ac237e2 | 819 | mem->method = method; |
62e76326 | 820 | |
92695e5e | 821 | if (neighbors_do_private_keys || !flags.hierarchical) |
d88e3c49 | 822 | e->setPrivateKey(); |
86101e40 | 823 | else |
d88e3c49 | 824 | e->setPublicKey(); |
62e76326 | 825 | |
92695e5e | 826 | if (flags.cachable) { |
62e76326 | 827 | EBIT_SET(e->flags, ENTRY_CACHABLE); |
828 | EBIT_CLR(e->flags, RELEASE_REQUEST); | |
090089c4 | 829 | } else { |
d88e3c49 | 830 | /* StoreEntry::releaseRequest() clears ENTRY_CACHABLE */ |
831 | e->releaseRequest(); | |
090089c4 | 832 | } |
62e76326 | 833 | |
234967c9 | 834 | e->store_status = STORE_PENDING; |
3900307b | 835 | e->setMemStatus(NOT_IN_MEMORY); |
090089c4 | 836 | e->refcount = 0; |
b8de7ebe | 837 | e->lastref = squid_curtime; |
3900307b | 838 | e->timestamp = -1; /* set in StoreEntry::timestampsSet() */ |
30a4f2a8 | 839 | e->ping_status = PING_NONE; |
d46a87a8 | 840 | EBIT_SET(e->flags, ENTRY_VALIDATED); |
090089c4 | 841 | return e; |
842 | } | |
843 | ||
6eb42cae | 844 | /* Mark object as expired */ |
b8d8561b | 845 | void |
d88e3c49 | 846 | StoreEntry::expireNow() |
9174e204 | 847 | { |
bf8fe701 | 848 | debugs(20, 3, "StoreEntry::expireNow: '" << getMD5Text() << "'"); |
d88e3c49 | 849 | expires = squid_curtime; |
9174e204 | 850 | } |
851 | ||
528b2c61 | 852 | void |
853 | storeWriteComplete (void *data, StoreIOBuffer wroteBuffer) | |
854 | { | |
1d5161bd | 855 | PROF_start(storeWriteComplete); |
528b2c61 | 856 | StoreEntry *e = (StoreEntry *)data; |
62e76326 | 857 | |
1d5161bd | 858 | if (EBIT_TEST(e->flags, DELAY_SENDING)) { |
859 | PROF_stop(storeWriteComplete); | |
62e76326 | 860 | return; |
1d5161bd | 861 | } |
62e76326 | 862 | |
d88e3c49 | 863 | e->invokeHandlers(); |
1d5161bd | 864 | PROF_stop(storeWriteComplete); |
528b2c61 | 865 | } |
866 | ||
867 | void | |
868 | StoreEntry::write (StoreIOBuffer writeBuffer) | |
869 | { | |
870 | assert(mem_obj != NULL); | |
528b2c61 | 871 | /* This assert will change when we teach the store to update */ |
d2639a5b | 872 | PROF_start(StoreEntry_write); |
528b2c61 | 873 | assert(store_status == STORE_PENDING); |
62e76326 | 874 | |
d2639a5b | 875 | debugs(20, 5, "storeWrite: writing " << writeBuffer.length << " bytes for '" << getMD5Text() << "'"); |
876 | PROF_stop(StoreEntry_write); | |
528b2c61 | 877 | storeGetMemSpace(writeBuffer.length); |
878 | mem_obj->write (writeBuffer, storeWriteComplete, this); | |
879 | } | |
880 | ||
c21ad0f5 | 881 | /* Append incoming data from a primary server to an entry. */ |
882 | void | |
883 | StoreEntry::append(char const *buf, int len) | |
884 | { | |
885 | assert(mem_obj != NULL); | |
3a1c3e2f | 886 | assert(len >= 0); |
c21ad0f5 | 887 | assert(store_status == STORE_PENDING); |
528b2c61 | 888 | |
889 | StoreIOBuffer tempBuffer; | |
890 | tempBuffer.data = (char *)buf; | |
891 | tempBuffer.length = len; | |
aa18a4ca | 892 | /* |
893 | * XXX sigh, offset might be < 0 here, but it gets "corrected" | |
894 | * later. This offset crap is such a mess. | |
895 | */ | |
c21ad0f5 | 896 | tempBuffer.offset = mem_obj->endOffset() - (getReply() ? getReply()->hdr_sz : 0); |
897 | write(tempBuffer); | |
090089c4 | 898 | } |
899 | ||
c21ad0f5 | 900 | |
b8d8561b | 901 | void |
fe4e214f | 902 | storeAppendPrintf(StoreEntry * e, const char *fmt,...) |
15c05bb0 | 903 | { |
62d32805 | 904 | va_list args; |
905 | va_start(args, fmt); | |
62e76326 | 906 | |
cb69b4c7 | 907 | storeAppendVPrintf(e, fmt, args); |
908 | va_end(args); | |
909 | } | |
910 | ||
911 | /* used be storeAppendPrintf and Packer */ | |
912 | void | |
913 | storeAppendVPrintf(StoreEntry * e, const char *fmt, va_list vargs) | |
914 | { | |
915 | LOCAL_ARRAY(char, buf, 4096); | |
15c05bb0 | 916 | buf[0] = '\0'; |
cb69b4c7 | 917 | vsnprintf(buf, 4096, fmt, vargs); |
3900307b | 918 | e->append(buf, strlen(buf)); |
c30c5a73 | 919 | } |
920 | ||
26ac0430 | 921 | struct _store_check_cachable_hist { |
62e76326 | 922 | |
26ac0430 | 923 | struct { |
62e76326 | 924 | int non_get; |
925 | int not_entry_cachable; | |
926 | int wrong_content_length; | |
927 | int negative_cached; | |
928 | int too_big; | |
929 | int too_small; | |
930 | int private_key; | |
931 | int too_many_open_files; | |
932 | int too_many_open_fds; | |
2fadd50d | 933 | } no; |
62e76326 | 934 | |
26ac0430 | 935 | struct { |
62e76326 | 936 | int Default; |
2fadd50d HN |
937 | } yes; |
938 | } store_check_cachable_hist; | |
8423ff74 | 939 | |
c47511fd | 940 | int |
941 | storeTooManyDiskFilesOpen(void) | |
942 | { | |
943 | if (Config.max_open_disk_fds == 0) | |
62e76326 | 944 | return 0; |
945 | ||
83a29c95 | 946 | if (store_open_disk_fd > Config.max_open_disk_fds) |
62e76326 | 947 | return 1; |
948 | ||
c47511fd | 949 | return 0; |
950 | } | |
951 | ||
3900307b | 952 | int |
953 | StoreEntry::checkTooSmall() | |
d20b1cd0 | 954 | { |
3900307b | 955 | if (EBIT_TEST(flags, ENTRY_SPECIAL)) |
62e76326 | 956 | return 0; |
957 | ||
3900307b | 958 | if (STORE_OK == store_status) |
959 | if (mem_obj->object_sz < 0 || | |
26ac0430 | 960 | mem_obj->object_sz < Config.Store.minObjectSize) |
62e76326 | 961 | return 1; |
3900307b | 962 | if (getReply()->content_length > -1) |
47f6e231 | 963 | if (getReply()->content_length < Config.Store.minObjectSize) |
62e76326 | 964 | return 1; |
d20b1cd0 | 965 | return 0; |
966 | } | |
967 | ||
ddc9b32c AR |
968 | // TODO: remove checks already performed by swapoutPossible() |
969 | // TODO: move "too many open..." checks outside -- we are called too early/late | |
f09f5b26 | 970 | int |
3900307b | 971 | StoreEntry::checkCachable() |
6602e70e | 972 | { |
2ac237e2 | 973 | #if CACHE_ALL_METHODS |
62e76326 | 974 | |
3900307b | 975 | if (mem_obj->method != METHOD_GET) { |
bf8fe701 | 976 | debugs(20, 2, "StoreEntry::checkCachable: NO: non-GET method"); |
5db6bf73 | 977 | ++store_check_cachable_hist.no.non_get; |
2ac237e2 | 978 | } else |
979 | #endif | |
3900307b | 980 | if (store_status == STORE_OK && EBIT_TEST(flags, ENTRY_BAD_LENGTH)) { |
bf8fe701 | 981 | debugs(20, 2, "StoreEntry::checkCachable: NO: wrong content-length"); |
5db6bf73 | 982 | ++store_check_cachable_hist.no.wrong_content_length; |
3900307b | 983 | } else if (!EBIT_TEST(flags, ENTRY_CACHABLE)) { |
bf8fe701 | 984 | debugs(20, 2, "StoreEntry::checkCachable: NO: not cachable"); |
5db6bf73 | 985 | ++store_check_cachable_hist.no.not_entry_cachable; |
3900307b | 986 | } else if (EBIT_TEST(flags, ENTRY_NEGCACHED)) { |
bf8fe701 | 987 | debugs(20, 3, "StoreEntry::checkCachable: NO: negative cached"); |
5db6bf73 | 988 | ++store_check_cachable_hist.no.negative_cached; |
c21ad0f5 | 989 | return 0; /* avoid release call below */ |
3900307b | 990 | } else if ((getReply()->content_length > 0 && |
47f6e231 | 991 | getReply()->content_length |
62e76326 | 992 | > Config.Store.maxObjectSize) || |
47f6e231 | 993 | mem_obj->endOffset() > Config.Store.maxObjectSize) { |
bf8fe701 | 994 | debugs(20, 2, "StoreEntry::checkCachable: NO: too big"); |
5db6bf73 | 995 | ++store_check_cachable_hist.no.too_big; |
47f6e231 | 996 | } else if (getReply()->content_length > Config.Store.maxObjectSize) { |
bf8fe701 | 997 | debugs(20, 2, "StoreEntry::checkCachable: NO: too big"); |
5db6bf73 | 998 | ++store_check_cachable_hist.no.too_big; |
3900307b | 999 | } else if (checkTooSmall()) { |
bf8fe701 | 1000 | debugs(20, 2, "StoreEntry::checkCachable: NO: too small"); |
5db6bf73 | 1001 | ++store_check_cachable_hist.no.too_small; |
3900307b | 1002 | } else if (EBIT_TEST(flags, KEY_PRIVATE)) { |
bf8fe701 | 1003 | debugs(20, 3, "StoreEntry::checkCachable: NO: private key"); |
5db6bf73 | 1004 | ++store_check_cachable_hist.no.private_key; |
3900307b | 1005 | } else if (swap_status != SWAPOUT_NONE) { |
62e76326 | 1006 | /* |
1007 | * here we checked the swap_status because the remaining | |
1008 | * cases are only relevant only if we haven't started swapping | |
1009 | * out the object yet. | |
1010 | */ | |
1011 | return 1; | |
1012 | } else if (storeTooManyDiskFilesOpen()) { | |
bf8fe701 | 1013 | debugs(20, 2, "StoreEntry::checkCachable: NO: too many disk files open"); |
5db6bf73 | 1014 | ++store_check_cachable_hist.no.too_many_open_files; |
62e76326 | 1015 | } else if (fdNFree() < RESERVED_FD) { |
bf8fe701 | 1016 | debugs(20, 2, "StoreEntry::checkCachable: NO: too many FD's open"); |
5db6bf73 | 1017 | ++store_check_cachable_hist.no.too_many_open_fds; |
62e76326 | 1018 | } else { |
5db6bf73 | 1019 | ++store_check_cachable_hist.yes.Default; |
62e76326 | 1020 | return 1; |
1021 | } | |
1022 | ||
3900307b | 1023 | releaseRequest(); |
d88e3c49 | 1024 | /* StoreEntry::releaseRequest() cleared ENTRY_CACHABLE */ |
6602e70e | 1025 | return 0; |
1026 | } | |
1027 | ||
3900307b | 1028 | void |
1029 | storeCheckCachableStats(StoreEntry *sentry) | |
8423ff74 | 1030 | { |
c40acff3 | 1031 | storeAppendPrintf(sentry, "Category\t Count\n"); |
1032 | ||
a0cd8f99 | 1033 | #if CACHE_ALL_METHODS |
62e76326 | 1034 | |
8423ff74 | 1035 | storeAppendPrintf(sentry, "no.non_get\t%d\n", |
62e76326 | 1036 | store_check_cachable_hist.no.non_get); |
a0cd8f99 | 1037 | #endif |
62e76326 | 1038 | |
8423ff74 | 1039 | storeAppendPrintf(sentry, "no.not_entry_cachable\t%d\n", |
62e76326 | 1040 | store_check_cachable_hist.no.not_entry_cachable); |
8423ff74 | 1041 | storeAppendPrintf(sentry, "no.wrong_content_length\t%d\n", |
62e76326 | 1042 | store_check_cachable_hist.no.wrong_content_length); |
8423ff74 | 1043 | storeAppendPrintf(sentry, "no.negative_cached\t%d\n", |
62e76326 | 1044 | store_check_cachable_hist.no.negative_cached); |
8423ff74 | 1045 | storeAppendPrintf(sentry, "no.too_big\t%d\n", |
62e76326 | 1046 | store_check_cachable_hist.no.too_big); |
d20b1cd0 | 1047 | storeAppendPrintf(sentry, "no.too_small\t%d\n", |
62e76326 | 1048 | store_check_cachable_hist.no.too_small); |
8423ff74 | 1049 | storeAppendPrintf(sentry, "no.private_key\t%d\n", |
62e76326 | 1050 | store_check_cachable_hist.no.private_key); |
c5f627c2 | 1051 | storeAppendPrintf(sentry, "no.too_many_open_files\t%d\n", |
62e76326 | 1052 | store_check_cachable_hist.no.too_many_open_files); |
59ffcdf8 | 1053 | storeAppendPrintf(sentry, "no.too_many_open_fds\t%d\n", |
62e76326 | 1054 | store_check_cachable_hist.no.too_many_open_fds); |
8423ff74 | 1055 | storeAppendPrintf(sentry, "yes.default\t%d\n", |
62e76326 | 1056 | store_check_cachable_hist.yes.Default); |
8423ff74 | 1057 | } |
1058 | ||
b8d8561b | 1059 | void |
528b2c61 | 1060 | StoreEntry::complete() |
090089c4 | 1061 | { |
bf8fe701 | 1062 | debugs(20, 3, "storeComplete: '" << getMD5Text() << "'"); |
62e76326 | 1063 | |
528b2c61 | 1064 | if (store_status != STORE_PENDING) { |
62e76326 | 1065 | /* |
1066 | * if we're not STORE_PENDING, then probably we got aborted | |
1067 | * and there should be NO clients on this entry | |
1068 | */ | |
1069 | assert(EBIT_TEST(flags, ENTRY_ABORTED)); | |
1070 | assert(mem_obj->nclients == 0); | |
1071 | return; | |
b6403fac | 1072 | } |
62e76326 | 1073 | |
7d31d5fa | 1074 | /* This is suspect: mem obj offsets include the headers. do we adjust for that |
1075 | * in use of object_sz? | |
1076 | */ | |
528b2c61 | 1077 | mem_obj->object_sz = mem_obj->endOffset(); |
7d31d5fa | 1078 | |
528b2c61 | 1079 | store_status = STORE_OK; |
7d31d5fa | 1080 | |
528b2c61 | 1081 | assert(mem_status == NOT_IN_MEMORY); |
62e76326 | 1082 | |
528b2c61 | 1083 | if (!validLength()) { |
62e76326 | 1084 | EBIT_SET(flags, ENTRY_BAD_LENGTH); |
d88e3c49 | 1085 | releaseRequest(); |
41587298 | 1086 | } |
62e76326 | 1087 | |
6cfa8966 | 1088 | #if USE_CACHE_DIGESTS |
528b2c61 | 1089 | if (mem_obj->request) |
62e76326 | 1090 | mem_obj->request->hier.store_complete_stop = current_time; |
1091 | ||
39edba21 | 1092 | #endif |
d20b1cd0 | 1093 | /* |
d88e3c49 | 1094 | * We used to call invokeHandlers, then storeSwapOut. However, |
d20b1cd0 | 1095 | * Madhukar Reddy <myreddy@persistence.com> reported that |
1096 | * responses without content length would sometimes get released | |
1097 | * in client_side, thinking that the response is incomplete. | |
1098 | */ | |
d88e3c49 | 1099 | invokeHandlers(); |
7e3e1d01 | 1100 | } |
1101 | ||
090089c4 | 1102 | /* |
474cac1b | 1103 | * Someone wants to abort this transfer. Set the reason in the |
1104 | * request structure, call the server-side callback and mark the | |
2b906e48 | 1105 | * entry for releasing |
090089c4 | 1106 | */ |
b8d8561b | 1107 | void |
bfb55b6f | 1108 | StoreEntry::abort() |
090089c4 | 1109 | { |
5db6bf73 | 1110 | ++statCounter.aborted_requests; |
bfb55b6f | 1111 | assert(store_status == STORE_PENDING); |
1112 | assert(mem_obj != NULL); | |
bf8fe701 | 1113 | debugs(20, 6, "storeAbort: " << getMD5Text()); |
34266cde | 1114 | |
ac9cc053 | 1115 | lock(); /* lock while aborting */ |
d88e3c49 | 1116 | negativeCache(); |
34266cde | 1117 | |
d88e3c49 | 1118 | releaseRequest(); |
34266cde | 1119 | |
bfb55b6f | 1120 | EBIT_SET(flags, ENTRY_ABORTED); |
34266cde | 1121 | |
3900307b | 1122 | setMemStatus(NOT_IN_MEMORY); |
34266cde | 1123 | |
bfb55b6f | 1124 | store_status = STORE_OK; |
34266cde | 1125 | |
474cac1b | 1126 | /* Notify the server side */ |
62e76326 | 1127 | |
8ea67c2b | 1128 | /* |
1129 | * DPW 2007-05-07 | |
1130 | * Should we check abort.data for validity? | |
1131 | */ | |
bfb55b6f | 1132 | if (mem_obj->abort.callback) { |
26ac0430 AJ |
1133 | if (!cbdataReferenceValid(mem_obj->abort.data)) |
1134 | debugs(20,1,HERE << "queueing event when abort.data is not valid"); | |
bfb55b6f | 1135 | eventAdd("mem_obj->abort.callback", |
1136 | mem_obj->abort.callback, | |
1137 | mem_obj->abort.data, | |
62e76326 | 1138 | 0.0, |
8ea67c2b | 1139 | true); |
26ac0430 | 1140 | unregisterAbort(); |
bfcaf585 | 1141 | } |
62e76326 | 1142 | |
1143 | /* XXX Should we reverse these two, so that there is no | |
26ac0430 | 1144 | * unneeded disk swapping triggered? |
528b2c61 | 1145 | */ |
474cac1b | 1146 | /* Notify the client side */ |
d88e3c49 | 1147 | invokeHandlers(); |
62e76326 | 1148 | |
aa1a691e AR |
1149 | // abort swap out, invalidating what was created so far (release follows) |
1150 | swapOutFileClose(StoreIOState::writerGone); | |
62e76326 | 1151 | |
bfb55b6f | 1152 | unlock(); /* unlock */ |
090089c4 | 1153 | } |
1154 | ||
6d3c2758 HN |
1155 | /** |
1156 | * Clear Memory storage to accommodate the given object len | |
1157 | */ | |
1158 | void | |
d4432957 | 1159 | storeGetMemSpace(int size) |
090089c4 | 1160 | { |
1d5161bd | 1161 | PROF_start(storeGetMemSpace); |
b32508fb | 1162 | StoreEntry *e = NULL; |
20cba4b4 | 1163 | int released = 0; |
b32508fb | 1164 | static time_t last_check = 0; |
528b2c61 | 1165 | size_t pages_needed; |
6a566b9c | 1166 | RemovalPurgeWalker *walker; |
62e76326 | 1167 | |
1d5161bd | 1168 | if (squid_curtime == last_check) { |
1169 | PROF_stop(storeGetMemSpace); | |
62e76326 | 1170 | return; |
1d5161bd | 1171 | } |
62e76326 | 1172 | |
b32508fb | 1173 | last_check = squid_curtime; |
62e76326 | 1174 | |
2ad51840 | 1175 | pages_needed = (size + SM_PAGE_SIZE-1) / SM_PAGE_SIZE; |
62e76326 | 1176 | |
1d5161bd | 1177 | if (mem_node::InUseCount() + pages_needed < store_pages_max) { |
1178 | PROF_stop(storeGetMemSpace); | |
62e76326 | 1179 | return; |
1d5161bd | 1180 | } |
62e76326 | 1181 | |
e4049756 | 1182 | debugs(20, 2, "storeGetMemSpace: Starting, need " << pages_needed << |
1183 | " pages"); | |
62e76326 | 1184 | |
6a566b9c | 1185 | /* XXX what to set as max_scan here? */ |
1186 | walker = mem_policy->PurgeInit(mem_policy, 100000); | |
62e76326 | 1187 | |
c1dd71ae | 1188 | while ((e = walker->Next(walker))) { |
d88e3c49 | 1189 | e->purgeMem(); |
5db6bf73 | 1190 | ++released; |
62e76326 | 1191 | |
1192 | if (mem_node::InUseCount() + pages_needed < store_pages_max) | |
1193 | break; | |
8350fe9b | 1194 | } |
62e76326 | 1195 | |
6a566b9c | 1196 | walker->Done(walker); |
bf8fe701 | 1197 | debugs(20, 3, "storeGetMemSpace stats:"); |
1198 | debugs(20, 3, " " << std::setw(6) << hot_obj_count << " HOT objects"); | |
1199 | debugs(20, 3, " " << std::setw(6) << released << " were released"); | |
1d5161bd | 1200 | PROF_stop(storeGetMemSpace); |
090089c4 | 1201 | } |
1202 | ||
c8f4eac4 | 1203 | |
1204 | /* thunk through to Store::Root().maintain(). Note that this would be better still | |
26ac0430 AJ |
1205 | * if registered against the root store itself, but that requires more complex |
1206 | * update logic - bigger fish to fry first. Long term each store when | |
c8f4eac4 | 1207 | * it becomes active will self register |
1208 | */ | |
1209 | void | |
1210 | Store::Maintain(void *notused) | |
1211 | { | |
1212 | Store::Root().maintain(); | |
1213 | ||
1214 | /* Reregister a maintain event .. */ | |
1215 | eventAdd("MaintainSwapSpace", Maintain, NULL, 1.0, 1); | |
1216 | ||
1217 | } | |
1218 | ||
090089c4 | 1219 | /* The maximum objects to scan for maintain storage space */ |
c21ad0f5 | 1220 | #define MAINTAIN_MAX_SCAN 1024 |
1221 | #define MAINTAIN_MAX_REMOVE 64 | |
090089c4 | 1222 | |
2b906e48 | 1223 | /* |
fcefe642 | 1224 | * This routine is to be called by main loop in main.c. |
1225 | * It removes expired objects on only one bucket for each time called. | |
fcefe642 | 1226 | * |
1227 | * This should get called 1/s from main(). | |
1228 | */ | |
679ac4f0 | 1229 | void |
c8f4eac4 | 1230 | StoreController::maintain() |
090089c4 | 1231 | { |
6a566b9c | 1232 | static time_t last_warn_time = 0; |
cd748f27 | 1233 | |
88bfe092 | 1234 | PROF_start(storeMaintainSwapSpace); |
c8f4eac4 | 1235 | swapDir->maintain(); |
62e76326 | 1236 | |
c8f4eac4 | 1237 | /* this should be emitted by the oversize dir, not globally */ |
62e76326 | 1238 | |
39c1e1d9 | 1239 | if (Store::Root().currentSize() > Store::Root().maxSize()) { |
62e76326 | 1240 | if (squid_curtime - last_warn_time > 10) { |
c575fb6a | 1241 | debugs(20, DBG_CRITICAL, "WARNING: Disk space over limit: " |
cc34568d DK |
1242 | << Store::Root().currentSize() / 1024.0 << " KB > " |
1243 | << (Store::Root().maxSize() >> 10) << " KB"); | |
62e76326 | 1244 | last_warn_time = squid_curtime; |
1245 | } | |
6a566b9c | 1246 | } |
62e76326 | 1247 | |
88bfe092 | 1248 | PROF_stop(storeMaintainSwapSpace); |
090089c4 | 1249 | } |
1250 | ||
090089c4 | 1251 | /* release an object from a cache */ |
6c78a099 | 1252 | void |
5f33b71d | 1253 | StoreEntry::release() |
090089c4 | 1254 | { |
88bfe092 | 1255 | PROF_start(storeRelease); |
bf8fe701 | 1256 | debugs(20, 3, "storeRelease: Releasing: '" << getMD5Text() << "'"); |
090089c4 | 1257 | /* If, for any reason we can't discard this object because of an |
1258 | * outstanding request, mark it for pending release */ | |
62e76326 | 1259 | |
3900307b | 1260 | if (locked()) { |
d88e3c49 | 1261 | expireNow(); |
bf8fe701 | 1262 | debugs(20, 3, "storeRelease: Only setting RELEASE_REQUEST bit"); |
d88e3c49 | 1263 | releaseRequest(); |
62e76326 | 1264 | PROF_stop(storeRelease); |
1265 | return; | |
090089c4 | 1266 | } |
62e76326 | 1267 | |
bef81ea5 | 1268 | if (StoreController::store_dirs_rebuilding && swap_filen > -1) { |
d88e3c49 | 1269 | setPrivateKey(); |
62e76326 | 1270 | |
5f33b71d | 1271 | if (mem_obj) |
3900307b | 1272 | destroyMemObject(); |
62e76326 | 1273 | |
5f33b71d | 1274 | if (swap_filen > -1) { |
62e76326 | 1275 | /* |
34266cde | 1276 | * Fake a call to StoreEntry->lock() When rebuilding is done, |
1277 | * we'll just call StoreEntry->unlock() on these. | |
62e76326 | 1278 | */ |
5db6bf73 | 1279 | ++lock_count; |
5f33b71d | 1280 | setReleaseFlag(); |
1281 | LateReleaseStack.push_back(this); | |
62e76326 | 1282 | } else { |
5f33b71d | 1283 | destroyStoreEntry(static_cast<hash_link *>(this)); |
22c25cbb | 1284 | // "this" is no longer valid |
62e76326 | 1285 | } |
22c25cbb AR |
1286 | |
1287 | PROF_stop(storeRelease); | |
1288 | return; | |
43d9cf56 | 1289 | } |
62e76326 | 1290 | |
5f33b71d | 1291 | storeLog(STORE_LOG_RELEASE, this); |
62e76326 | 1292 | |
5f33b71d | 1293 | if (swap_filen > -1) { |
f58bb2f4 | 1294 | // log before unlink() below clears swap_filen |
5f33b71d | 1295 | if (!EBIT_TEST(flags, KEY_PRIVATE)) |
1296 | storeDirSwapLog(this, SWAP_LOG_DEL); | |
62e76326 | 1297 | |
f58bb2f4 | 1298 | unlink(); |
090089c4 | 1299 | } |
62e76326 | 1300 | |
3900307b | 1301 | setMemStatus(NOT_IN_MEMORY); |
5f33b71d | 1302 | destroyStoreEntry(static_cast<hash_link *>(this)); |
88bfe092 | 1303 | PROF_stop(storeRelease); |
090089c4 | 1304 | } |
1305 | ||
e42d5181 | 1306 | static void |
1307 | storeLateRelease(void *unused) | |
1308 | { | |
1309 | StoreEntry *e; | |
1310 | int i; | |
1311 | static int n = 0; | |
62e76326 | 1312 | |
bef81ea5 | 1313 | if (StoreController::store_dirs_rebuilding) { |
62e76326 | 1314 | eventAdd("storeLateRelease", storeLateRelease, NULL, 1.0, 1); |
1315 | return; | |
e42d5181 | 1316 | } |
62e76326 | 1317 | |
5db6bf73 | 1318 | for (i = 0; i < 10; ++i) { |
eb7e416e | 1319 | e = LateReleaseStack.count ? LateReleaseStack.pop() : NULL; |
62e76326 | 1320 | |
1321 | if (e == NULL) { | |
1322 | /* done! */ | |
bf8fe701 | 1323 | debugs(20, 1, "storeLateRelease: released " << n << " objects"); |
62e76326 | 1324 | return; |
1325 | } | |
1326 | ||
97b5e68f | 1327 | e->unlock(); |
5db6bf73 | 1328 | ++n; |
e42d5181 | 1329 | } |
62e76326 | 1330 | |
e42d5181 | 1331 | eventAdd("storeLateRelease", storeLateRelease, NULL, 0.0, 1); |
1332 | } | |
1333 | ||
090089c4 | 1334 | /* return 1 if a store entry is locked */ |
cd748f27 | 1335 | int |
3900307b | 1336 | StoreEntry::locked() const |
090089c4 | 1337 | { |
3900307b | 1338 | if (lock_count) |
62e76326 | 1339 | return 1; |
1340 | ||
3900307b | 1341 | if (swap_status == SWAPOUT_WRITING) |
62e76326 | 1342 | return 1; |
1343 | ||
3900307b | 1344 | if (store_status == STORE_PENDING) |
62e76326 | 1345 | return 1; |
1346 | ||
b8890359 | 1347 | /* |
1348 | * SPECIAL, PUBLIC entries should be "locked" | |
1349 | */ | |
3900307b | 1350 | if (EBIT_TEST(flags, ENTRY_SPECIAL)) |
1351 | if (!EBIT_TEST(flags, KEY_PRIVATE)) | |
62e76326 | 1352 | return 1; |
1353 | ||
30a4f2a8 | 1354 | return 0; |
090089c4 | 1355 | } |
1356 | ||
528b2c61 | 1357 | bool |
1358 | StoreEntry::validLength() const | |
6602e70e | 1359 | { |
47f6e231 | 1360 | int64_t diff; |
d8b249ef | 1361 | const HttpReply *reply; |
528b2c61 | 1362 | assert(mem_obj != NULL); |
1363 | reply = getReply(); | |
bf8fe701 | 1364 | debugs(20, 3, "storeEntryValidLength: Checking '" << getMD5Text() << "'"); |
e4049756 | 1365 | debugs(20, 5, "storeEntryValidLength: object_len = " << |
707fdc47 | 1366 | objectLen()); |
bf8fe701 | 1367 | debugs(20, 5, "storeEntryValidLength: hdr_sz = " << reply->hdr_sz); |
1368 | debugs(20, 5, "storeEntryValidLength: content_length = " << reply->content_length); | |
62e76326 | 1369 | |
d8b249ef | 1370 | if (reply->content_length < 0) { |
bf8fe701 | 1371 | debugs(20, 5, "storeEntryValidLength: Unspecified content length: " << getMD5Text()); |
62e76326 | 1372 | return 1; |
ffe4a367 | 1373 | } |
62e76326 | 1374 | |
07304bf9 | 1375 | if (reply->hdr_sz == 0) { |
bf8fe701 | 1376 | debugs(20, 5, "storeEntryValidLength: Zero header size: " << getMD5Text()); |
62e76326 | 1377 | return 1; |
ffe4a367 | 1378 | } |
62e76326 | 1379 | |
528b2c61 | 1380 | if (mem_obj->method == METHOD_HEAD) { |
bf8fe701 | 1381 | debugs(20, 5, "storeEntryValidLength: HEAD request: " << getMD5Text()); |
62e76326 | 1382 | return 1; |
ffe4a367 | 1383 | } |
62e76326 | 1384 | |
cb69b4c7 | 1385 | if (reply->sline.status == HTTP_NOT_MODIFIED) |
62e76326 | 1386 | return 1; |
1387 | ||
cb69b4c7 | 1388 | if (reply->sline.status == HTTP_NO_CONTENT) |
62e76326 | 1389 | return 1; |
1390 | ||
707fdc47 | 1391 | diff = reply->hdr_sz + reply->content_length - objectLen(); |
62e76326 | 1392 | |
ebf4efff | 1393 | if (diff == 0) |
62e76326 | 1394 | return 1; |
1395 | ||
bf8fe701 | 1396 | debugs(20, 3, "storeEntryValidLength: " << (diff < 0 ? -diff : diff) << " bytes too " << (diff < 0 ? "big" : "small") <<"; '" << getMD5Text() << "'" ); |
62e76326 | 1397 | |
ebf4efff | 1398 | return 0; |
ffe4a367 | 1399 | } |
6602e70e | 1400 | |
6b7d87bb FC |
1401 | static void |
1402 | storeRegisterWithCacheManager(void) | |
1403 | { | |
8822ebee AR |
1404 | Mgr::RegisterAction("storedir", "Store Directory Stats", Store::Stats, 0, 1); |
1405 | Mgr::RegisterAction("store_io", "Store IO Interface Stats", &Mgr::StoreIoAction::Create, 0, 1); | |
1406 | Mgr::RegisterAction("store_check_cachable_stats", "storeCheckCachable() Stats", | |
d9fc6862 | 1407 | storeCheckCachableStats, 0, 1); |
6b7d87bb FC |
1408 | } |
1409 | ||
b8d8561b | 1410 | void |
1411 | storeInit(void) | |
c943f331 | 1412 | { |
25535cbe | 1413 | storeKeyInit(); |
6a566b9c | 1414 | mem_policy = createRemovalPolicy(Config.memPolicy); |
8638fc66 | 1415 | storeDigestInit(); |
e3ef2b09 | 1416 | storeLogOpen(); |
e42d5181 | 1417 | eventAdd("storeLateRelease", storeLateRelease, NULL, 1.0, 1); |
c8f4eac4 | 1418 | Store::Root().init(); |
b2c141d4 | 1419 | storeRebuildStart(); |
d120ed12 FC |
1420 | |
1421 | storeRegisterWithCacheManager(); | |
62ee09ca | 1422 | } |
1423 | ||
b8d8561b | 1424 | void |
1425 | storeConfigure(void) | |
b1c0cc67 | 1426 | { |
c8f4eac4 | 1427 | store_swap_high = (long) (((float) Store::Root().maxSize() * |
62e76326 | 1428 | (float) Config.Swap.highWaterMark) / (float) 100); |
c8f4eac4 | 1429 | store_swap_low = (long) (((float) Store::Root().maxSize() * |
62e76326 | 1430 | (float) Config.Swap.lowWaterMark) / (float) 100); |
505d4821 | 1431 | store_pages_max = Config.memMaxSize / sizeof(mem_node); |
090089c4 | 1432 | } |
1433 | ||
9487bae9 AR |
1434 | bool |
1435 | StoreEntry::memoryCachable() const | |
56f29785 | 1436 | { |
3900307b | 1437 | if (mem_obj == NULL) |
62e76326 | 1438 | return 0; |
1439 | ||
3900307b | 1440 | if (mem_obj->data_hdr.size() == 0) |
62e76326 | 1441 | return 0; |
1442 | ||
19fdd3f3 | 1443 | if (mem_obj->inmem_lo != 0) |
e1381638 | 1444 | return 0; |
19fdd3f3 | 1445 | |
d227e181 | 1446 | if (!Config.onoff.memory_cache_first && swap_status == SWAPOUT_DONE && refcount == 1) |
e1381638 | 1447 | return 0; |
19fdd3f3 HN |
1448 | |
1449 | return 1; | |
56f29785 | 1450 | } |
1451 | ||
edce4d98 | 1452 | int |
3900307b | 1453 | StoreEntry::checkNegativeHit() const |
edce4d98 | 1454 | { |
3900307b | 1455 | if (!EBIT_TEST(flags, ENTRY_NEGCACHED)) |
62e76326 | 1456 | return 0; |
1457 | ||
3900307b | 1458 | if (expires <= squid_curtime) |
62e76326 | 1459 | return 0; |
1460 | ||
3900307b | 1461 | if (store_status != STORE_OK) |
62e76326 | 1462 | return 0; |
1463 | ||
edce4d98 | 1464 | return 1; |
1465 | } | |
1466 | ||
ac9cc053 AJ |
1467 | /** |
1468 | * Set object for negative caching. | |
1469 | * Preserves any expiry information given by the server. | |
1470 | * In absence of proper expiry info it will set to expire immediately, | |
1471 | * or with HTTP-violations enabled the configured negative-TTL is observed | |
1472 | */ | |
b8d8561b | 1473 | void |
d88e3c49 | 1474 | StoreEntry::negativeCache() |
79b5cc5f | 1475 | { |
da03a7e0 AJ |
1476 | // XXX: should make the default for expires 0 instead of -1 |
1477 | // so we can distinguish "Expires: -1" from nothing. | |
1478 | if (expires <= 0) | |
626096be | 1479 | #if USE_HTTP_VIOLATIONS |
ac9cc053 AJ |
1480 | expires = squid_curtime + Config.negativeTtl; |
1481 | #else | |
1482 | expires = squid_curtime; | |
1483 | #endif | |
d88e3c49 | 1484 | EBIT_SET(flags, ENTRY_NEGCACHED); |
79b5cc5f | 1485 | } |
0a21bd84 | 1486 | |
1487 | void | |
1488 | storeFreeMemory(void) | |
1489 | { | |
c8f4eac4 | 1490 | Store::Root(NULL); |
9bc73deb | 1491 | #if USE_CACHE_DIGESTS |
62e76326 | 1492 | |
8638fc66 | 1493 | if (store_digest) |
62e76326 | 1494 | cacheDigestDestroy(store_digest); |
1495 | ||
c68e9c6b | 1496 | #endif |
62e76326 | 1497 | |
8638fc66 | 1498 | store_digest = NULL; |
0a21bd84 | 1499 | } |
a7e59001 | 1500 | |
1501 | int | |
1502 | expiresMoreThan(time_t expires, time_t when) | |
1503 | { | |
c21ad0f5 | 1504 | if (expires < 0) /* No Expires given */ |
62e76326 | 1505 | return 1; |
1506 | ||
48f44632 | 1507 | return (expires > (squid_curtime + when)); |
a7e59001 | 1508 | } |
fe54d06d | 1509 | |
1510 | int | |
3900307b | 1511 | StoreEntry::validToSend() const |
fe54d06d | 1512 | { |
3900307b | 1513 | if (EBIT_TEST(flags, RELEASE_REQUEST)) |
62e76326 | 1514 | return 0; |
1515 | ||
3900307b | 1516 | if (EBIT_TEST(flags, ENTRY_NEGCACHED)) |
1517 | if (expires <= squid_curtime) | |
62e76326 | 1518 | return 0; |
1519 | ||
3900307b | 1520 | if (EBIT_TEST(flags, ENTRY_ABORTED)) |
62e76326 | 1521 | return 0; |
1522 | ||
fe54d06d | 1523 | return 1; |
1524 | } | |
62663274 | 1525 | |
ca98227c | 1526 | void |
3900307b | 1527 | StoreEntry::timestampsSet() |
ca98227c | 1528 | { |
3900307b | 1529 | const HttpReply *reply = getReply(); |
2f58241d | 1530 | time_t served_date = reply->date; |
a9925b40 | 1531 | int age = reply->header.getInt(HDR_AGE); |
31d36bfd | 1532 | /* Compute the timestamp, mimicking RFC2616 section 13.2.3. */ |
2f58241d | 1533 | /* make sure that 0 <= served_date <= squid_curtime */ |
62e76326 | 1534 | |
2f58241d | 1535 | if (served_date < 0 || served_date > squid_curtime) |
62e76326 | 1536 | served_date = squid_curtime; |
1537 | ||
525bf9dc BD |
1538 | /* Bug 1791: |
1539 | * If the returned Date: is more than 24 hours older than | |
1540 | * the squid_curtime, then one of us needs to use NTP to set our | |
1541 | * clock. We'll pretend that our clock is right. | |
1542 | */ | |
1543 | else if (served_date < (squid_curtime - 24 * 60 * 60) ) | |
1544 | served_date = squid_curtime; | |
62e76326 | 1545 | |
efd900cb | 1546 | /* |
212cbb48 | 1547 | * Compensate with Age header if origin server clock is ahead |
1548 | * of us and there is a cache in between us and the origin | |
1549 | * server. But DONT compensate if the age value is larger than | |
1550 | * squid_curtime because it results in a negative served_date. | |
efd900cb | 1551 | */ |
1552 | if (age > squid_curtime - served_date) | |
62e76326 | 1553 | if (squid_curtime > age) |
1554 | served_date = squid_curtime - age; | |
1555 | ||
31d36bfd AR |
1556 | // compensate for Squid-to-server and server-to-Squid delays |
1557 | if (mem_obj && mem_obj->request) { | |
1558 | const time_t request_sent = | |
1559 | mem_obj->request->hier.peer_http_request_sent.tv_sec; | |
1560 | if (0 < request_sent && request_sent < squid_curtime) | |
1561 | served_date -= (squid_curtime - request_sent); | |
1562 | } | |
1563 | ||
0d465a25 | 1564 | if (reply->expires > 0 && reply->date > -1) |
26ac0430 | 1565 | expires = served_date + (reply->expires - reply->date); |
0d465a25 | 1566 | else |
26ac0430 | 1567 | expires = reply->expires; |
62e76326 | 1568 | |
3900307b | 1569 | lastmod = reply->last_modified; |
62e76326 | 1570 | |
3900307b | 1571 | timestamp = served_date; |
ca98227c | 1572 | } |
429fdbec | 1573 | |
bfcaf585 | 1574 | void |
3900307b | 1575 | StoreEntry::registerAbort(STABH * cb, void *data) |
bfcaf585 | 1576 | { |
3900307b | 1577 | assert(mem_obj); |
1578 | assert(mem_obj->abort.callback == NULL); | |
1579 | mem_obj->abort.callback = cb; | |
8ea67c2b | 1580 | mem_obj->abort.data = cbdataReference(data); |
bfcaf585 | 1581 | } |
1582 | ||
1583 | void | |
3900307b | 1584 | StoreEntry::unregisterAbort() |
bfcaf585 | 1585 | { |
3900307b | 1586 | assert(mem_obj); |
8ea67c2b | 1587 | if (mem_obj->abort.callback) { |
26ac0430 AJ |
1588 | mem_obj->abort.callback = NULL; |
1589 | cbdataReferenceDone(mem_obj->abort.data); | |
8ea67c2b | 1590 | } |
bfcaf585 | 1591 | } |
88738790 | 1592 | |
f09f5b26 | 1593 | void |
3900307b | 1594 | StoreEntry::dump(int l) const |
1595 | { | |
bf8fe701 | 1596 | debugs(20, l, "StoreEntry->key: " << getMD5Text()); |
1597 | debugs(20, l, "StoreEntry->next: " << next); | |
1598 | debugs(20, l, "StoreEntry->mem_obj: " << mem_obj); | |
4a7a3d56 | 1599 | debugs(20, l, "StoreEntry->timestamp: " << timestamp); |
1600 | debugs(20, l, "StoreEntry->lastref: " << lastref); | |
1601 | debugs(20, l, "StoreEntry->expires: " << expires); | |
1602 | debugs(20, l, "StoreEntry->lastmod: " << lastmod); | |
1603 | debugs(20, l, "StoreEntry->swap_file_sz: " << swap_file_sz); | |
bf8fe701 | 1604 | debugs(20, l, "StoreEntry->refcount: " << refcount); |
1605 | debugs(20, l, "StoreEntry->flags: " << storeEntryFlags(this)); | |
4a7a3d56 | 1606 | debugs(20, l, "StoreEntry->swap_dirn: " << swap_dirn); |
1607 | debugs(20, l, "StoreEntry->swap_filen: " << swap_filen); | |
1608 | debugs(20, l, "StoreEntry->lock_count: " << lock_count); | |
1609 | debugs(20, l, "StoreEntry->mem_status: " << mem_status); | |
1610 | debugs(20, l, "StoreEntry->ping_status: " << ping_status); | |
1611 | debugs(20, l, "StoreEntry->store_status: " << store_status); | |
1612 | debugs(20, l, "StoreEntry->swap_status: " << swap_status); | |
d377699f | 1613 | } |
1614 | ||
1f38f50a | 1615 | /* |
1616 | * NOTE, this function assumes only two mem states | |
1617 | */ | |
f09f5b26 | 1618 | void |
3900307b | 1619 | StoreEntry::setMemStatus(mem_status_t new_status) |
8350fe9b | 1620 | { |
3900307b | 1621 | if (new_status == mem_status) |
62e76326 | 1622 | return; |
1623 | ||
6ebe9a4c AR |
1624 | // are we using a shared memory cache? |
1625 | if (Config.memShared && IamWorkerProcess()) { | |
c5426f8f AR |
1626 | // enumerate calling cases if shared memory is enabled |
1627 | assert(new_status != IN_MEMORY || EBIT_TEST(flags, ENTRY_SPECIAL)); | |
9487bae9 AR |
1628 | // This method was designed to update replacement policy, not to |
1629 | // actually purge something from the memory cache (TODO: rename?). | |
1630 | // Shared memory cache does not have a policy that needs updates. | |
1631 | mem_status = new_status; | |
1632 | return; | |
1633 | } | |
1634 | ||
3900307b | 1635 | assert(mem_obj != NULL); |
62e76326 | 1636 | |
b93bcace | 1637 | if (new_status == IN_MEMORY) { |
3900307b | 1638 | assert(mem_obj->inmem_lo == 0); |
62e76326 | 1639 | |
3900307b | 1640 | if (EBIT_TEST(flags, ENTRY_SPECIAL)) { |
bf8fe701 | 1641 | debugs(20, 4, "StoreEntry::setMemStatus: not inserting special " << mem_obj->url << " into policy"); |
62e76326 | 1642 | } else { |
3900307b | 1643 | mem_policy->Add(mem_policy, this, &mem_obj->repl); |
e2851fe7 | 1644 | debugs(20, 4, "StoreEntry::setMemStatus: inserted mem node " << mem_obj->url << " key: " << getMD5Text()); |
62e76326 | 1645 | } |
1646 | ||
5db6bf73 | 1647 | ++hot_obj_count; // TODO: maintain for the shared hot cache as well |
b93bcace | 1648 | } else { |
3900307b | 1649 | if (EBIT_TEST(flags, ENTRY_SPECIAL)) { |
bf8fe701 | 1650 | debugs(20, 4, "StoreEntry::setMemStatus: special entry " << mem_obj->url); |
62e76326 | 1651 | } else { |
3900307b | 1652 | mem_policy->Remove(mem_policy, this, &mem_obj->repl); |
bf8fe701 | 1653 | debugs(20, 4, "StoreEntry::setMemStatus: removed mem node " << mem_obj->url); |
62e76326 | 1654 | } |
1655 | ||
1656 | hot_obj_count--; | |
b93bcace | 1657 | } |
62e76326 | 1658 | |
3900307b | 1659 | mem_status = new_status; |
8350fe9b | 1660 | } |
6e86c3e8 | 1661 | |
9fb13bb6 | 1662 | const char * |
3900307b | 1663 | StoreEntry::url() const |
9fb13bb6 | 1664 | { |
3900307b | 1665 | if (this == NULL) |
62e76326 | 1666 | return "[null_entry]"; |
3900307b | 1667 | else if (mem_obj == NULL) |
62e76326 | 1668 | return "[null_mem_obj]"; |
9fb13bb6 | 1669 | else |
3900307b | 1670 | return mem_obj->url; |
9fb13bb6 | 1671 | } |
24ffafb4 | 1672 | |
1673 | void | |
d5f8d05f | 1674 | StoreEntry::createMemObject(const char *aUrl, const char *aLogUrl) |
24ffafb4 | 1675 | { |
3900307b | 1676 | if (mem_obj) |
62e76326 | 1677 | return; |
1678 | ||
9487bae9 AR |
1679 | if (hidden_mem_obj) { |
1680 | debugs(20, 3, HERE << "restoring " << hidden_mem_obj); | |
1681 | mem_obj = hidden_mem_obj; | |
1682 | hidden_mem_obj = NULL; | |
1683 | mem_obj->resetUrls(aUrl, aLogUrl); | |
1684 | return; | |
1685 | } | |
1686 | ||
d5f8d05f | 1687 | mem_obj = new MemObject(aUrl, aLogUrl); |
c21ad0f5 | 1688 | } |
1689 | ||
1690 | /* this just sets DELAY_SENDING */ | |
1691 | void | |
1692 | StoreEntry::buffer() | |
1693 | { | |
1694 | EBIT_SET(flags, DELAY_SENDING); | |
1695 | } | |
1696 | ||
438fc1e3 | 1697 | /* this just clears DELAY_SENDING and Invokes the handlers */ |
1698 | void | |
c21ad0f5 | 1699 | StoreEntry::flush() |
438fc1e3 | 1700 | { |
c21ad0f5 | 1701 | if (EBIT_TEST(flags, DELAY_SENDING)) { |
1702 | EBIT_CLR(flags, DELAY_SENDING); | |
d88e3c49 | 1703 | invokeHandlers(); |
b66315e4 | 1704 | } |
25535cbe | 1705 | } |
07304bf9 | 1706 | |
47f6e231 | 1707 | int64_t |
707fdc47 | 1708 | StoreEntry::objectLen() const |
07304bf9 | 1709 | { |
707fdc47 | 1710 | assert(mem_obj != NULL); |
1711 | return mem_obj->object_sz; | |
07304bf9 | 1712 | } |
1713 | ||
47f6e231 | 1714 | int64_t |
b37bde1e | 1715 | StoreEntry::contentLen() const |
07304bf9 | 1716 | { |
b37bde1e | 1717 | assert(mem_obj != NULL); |
1718 | assert(getReply() != NULL); | |
1719 | return objectLen() - getReply()->hdr_sz; | |
07304bf9 | 1720 | } |
f3986a15 | 1721 | |
528b2c61 | 1722 | HttpReply const * |
1723 | StoreEntry::getReply () const | |
f3986a15 | 1724 | { |
528b2c61 | 1725 | if (NULL == mem_obj) |
62e76326 | 1726 | return NULL; |
1727 | ||
528b2c61 | 1728 | return mem_obj->getReply(); |
f3986a15 | 1729 | } |
db1cd23c | 1730 | |
1731 | void | |
3900307b | 1732 | StoreEntry::reset() |
db1cd23c | 1733 | { |
3900307b | 1734 | assert (mem_obj); |
bf8fe701 | 1735 | debugs(20, 3, "StoreEntry::reset: " << url()); |
3900307b | 1736 | mem_obj->reset(); |
1737 | HttpReply *rep = (HttpReply *) getReply(); // bypass const | |
06a5ae20 | 1738 | rep->reset(); |
3900307b | 1739 | expires = lastmod = timestamp = -1; |
db1cd23c | 1740 | } |
2b906e48 | 1741 | |
cd748f27 | 1742 | /* |
1743 | * storeFsInit | |
1744 | * | |
1745 | * This routine calls the SETUP routine for each fs type. | |
1746 | * I don't know where the best place for this is, and I'm not going to shuffle | |
1747 | * around large chunks of code right now (that can be done once its working.) | |
1748 | */ | |
1749 | void | |
1750 | storeFsInit(void) | |
1751 | { | |
22d38e05 | 1752 | storeReplSetup(); |
cd748f27 | 1753 | } |
1754 | ||
22d38e05 | 1755 | /* |
1756 | * called to add another store removal policy module | |
1757 | */ | |
1758 | void | |
a2c963ae | 1759 | storeReplAdd(const char *type, REMOVALPOLICYCREATE * create) |
22d38e05 | 1760 | { |
1761 | int i; | |
62e76326 | 1762 | |
d64c1498 | 1763 | /* find the number of currently known repl types */ |
5db6bf73 | 1764 | for (i = 0; storerepl_list && storerepl_list[i].typestr; ++i) { |
d64c1498 AJ |
1765 | if (strcmp(storerepl_list[i].typestr, type) == 0) { |
1766 | debugs(20, 1, "WARNING: Trying to load store replacement policy " << type << " twice."); | |
1767 | return; | |
1768 | } | |
22d38e05 | 1769 | } |
62e76326 | 1770 | |
22d38e05 | 1771 | /* add the new type */ |
e6ccf245 | 1772 | storerepl_list = static_cast<storerepl_entry_t *>(xrealloc(storerepl_list, (i + 2) * sizeof(storerepl_entry_t))); |
62e76326 | 1773 | |
22d38e05 | 1774 | memset(&storerepl_list[i + 1], 0, sizeof(storerepl_entry_t)); |
62e76326 | 1775 | |
22d38e05 | 1776 | storerepl_list[i].typestr = type; |
62e76326 | 1777 | |
22d38e05 | 1778 | storerepl_list[i].create = create; |
1779 | } | |
1780 | ||
1781 | /* | |
1782 | * Create a removal policy instance | |
1783 | */ | |
1784 | RemovalPolicy * | |
1785 | createRemovalPolicy(RemovalPolicySettings * settings) | |
1786 | { | |
1787 | storerepl_entry_t *r; | |
62e76326 | 1788 | |
5db6bf73 | 1789 | for (r = storerepl_list; r && r->typestr; ++r) { |
62e76326 | 1790 | if (strcmp(r->typestr, settings->type) == 0) |
1791 | return r->create(settings->args); | |
22d38e05 | 1792 | } |
62e76326 | 1793 | |
bf8fe701 | 1794 | debugs(20, 1, "ERROR: Unknown policy " << settings->type); |
1795 | debugs(20, 1, "ERROR: Be sure to have set cache_replacement_policy"); | |
1796 | debugs(20, 1, "ERROR: and memory_replacement_policy in squid.conf!"); | |
0c5ccf11 | 1797 | fatalf("ERROR: Unknown policy %s\n", settings->type); |
c21ad0f5 | 1798 | return NULL; /* NOTREACHED */ |
22d38e05 | 1799 | } |
1800 | ||
cd748f27 | 1801 | #if 0 |
fc8b9fc0 | 1802 | void |
1803 | storeSwapFileNumberSet(StoreEntry * e, sfileno filn) | |
1804 | { | |
1805 | if (e->swap_file_number == filn) | |
62e76326 | 1806 | return; |
1807 | ||
fc8b9fc0 | 1808 | if (filn < 0) { |
62e76326 | 1809 | assert(-1 == filn); |
1810 | storeDirMapBitReset(e->swap_file_number); | |
1811 | storeDirLRUDelete(e); | |
1812 | e->swap_file_number = -1; | |
fc8b9fc0 | 1813 | } else { |
62e76326 | 1814 | assert(-1 == e->swap_file_number); |
1815 | storeDirMapBitSet(e->swap_file_number = filn); | |
1816 | storeDirLRUAdd(e); | |
fc8b9fc0 | 1817 | } |
1818 | } | |
62e76326 | 1819 | |
cd748f27 | 1820 | #endif |
e6ccf245 | 1821 | |
4a56ee8d | 1822 | |
db237875 | 1823 | /* |
1824 | * Replace a store entry with | |
528b2c61 | 1825 | * a new reply. This eats the reply. |
1826 | */ | |
4a56ee8d | 1827 | void |
3756e5c0 | 1828 | StoreEntry::replaceHttpReply(HttpReply *rep, bool andStartWriting) |
4a56ee8d | 1829 | { |
bf8fe701 | 1830 | debugs(20, 3, "StoreEntry::replaceHttpReply: " << url()); |
62e76326 | 1831 | |
4a56ee8d | 1832 | if (!mem_obj) { |
bf8fe701 | 1833 | debugs(20, 0, "Attempt to replace object with no in-memory representation"); |
62e76326 | 1834 | return; |
528b2c61 | 1835 | } |
62e76326 | 1836 | |
4a56ee8d | 1837 | mem_obj->replaceHttpReply(rep); |
1838 | ||
3756e5c0 AR |
1839 | if (andStartWriting) |
1840 | startWriting(); | |
1841 | } | |
1842 | ||
1843 | ||
1844 | void | |
1845 | StoreEntry::startWriting() | |
1846 | { | |
1847 | Packer p; | |
1848 | ||
528b2c61 | 1849 | /* TODO: when we store headers serparately remove the header portion */ |
1850 | /* TODO: mark the length of the headers ? */ | |
1851 | /* We ONLY want the headers */ | |
4a56ee8d | 1852 | packerToStoreInit(&p, this); |
62e76326 | 1853 | |
4a56ee8d | 1854 | assert (isEmpty()); |
3756e5c0 | 1855 | assert(mem_obj); |
9199139f | 1856 | |
3756e5c0 AR |
1857 | const HttpReply *rep = getReply(); |
1858 | assert(rep); | |
62e76326 | 1859 | |
3756e5c0 AR |
1860 | rep->packHeadersInto(&p); |
1861 | mem_obj->markEndOfReplyHeaders(); | |
62e76326 | 1862 | |
0521f8be | 1863 | rep->body.packInto(&p); |
62e76326 | 1864 | |
528b2c61 | 1865 | packerClean(&p); |
1866 | } | |
62e76326 | 1867 | |
e6ccf245 | 1868 | |
528b2c61 | 1869 | char const * |
1870 | StoreEntry::getSerialisedMetaData() | |
1871 | { | |
1872 | StoreMeta *tlv_list = storeSwapMetaBuild(this); | |
1873 | int swap_hdr_sz; | |
1874 | char *result = storeSwapMetaPack(tlv_list, &swap_hdr_sz); | |
1875 | storeSwapTLVFree(tlv_list); | |
aa1a691e AR |
1876 | assert (swap_hdr_sz >= 0); |
1877 | mem_obj->swap_hdr_sz = (size_t) swap_hdr_sz; | |
528b2c61 | 1878 | return result; |
1879 | } | |
1880 | ||
528b2c61 | 1881 | void |
5b55f1f1 | 1882 | StoreEntry::trimMemory(const bool preserveSwappable) |
528b2c61 | 1883 | { |
7fef2365 | 1884 | /* |
1885 | * DPW 2007-05-09 | |
1886 | * Bug #1943. We must not let go any data for IN_MEMORY | |
1887 | * objects. We have to wait until the mem_status changes. | |
1888 | */ | |
1889 | if (mem_status == IN_MEMORY) | |
26ac0430 | 1890 | return; |
7fef2365 | 1891 | |
c5426f8f AR |
1892 | if (EBIT_TEST(flags, ENTRY_SPECIAL)) |
1893 | return; // cannot trim because we do not load them again | |
1894 | ||
5b55f1f1 | 1895 | if (!preserveSwappable) { |
e1381638 AJ |
1896 | if (mem_obj->policyLowestOffsetToKeep(0) == 0) { |
1897 | /* Nothing to do */ | |
1898 | return; | |
1899 | } | |
62e76326 | 1900 | /* |
1901 | * Its not swap-able, and we're about to delete a chunk, | |
1902 | * so we must make it PRIVATE. This is tricky/ugly because | |
1903 | * for the most part, we treat swapable == cachable here. | |
1904 | */ | |
d88e3c49 | 1905 | releaseRequest(); |
62e76326 | 1906 | mem_obj->trimUnSwappable (); |
528b2c61 | 1907 | } else { |
62e76326 | 1908 | mem_obj->trimSwappable (); |
528b2c61 | 1909 | } |
1910 | } | |
62e76326 | 1911 | |
0655fa4d | 1912 | bool |
190154cf | 1913 | StoreEntry::modifiedSince(HttpRequest * request) const |
0655fa4d | 1914 | { |
1915 | int object_length; | |
1916 | time_t mod_time = lastmod; | |
1917 | ||
1918 | if (mod_time < 0) | |
1919 | mod_time = timestamp; | |
1920 | ||
bf8fe701 | 1921 | debugs(88, 3, "modifiedSince: '" << url() << "'"); |
0655fa4d | 1922 | |
4a7a3d56 | 1923 | debugs(88, 3, "modifiedSince: mod_time = " << mod_time); |
0655fa4d | 1924 | |
1925 | if (mod_time < 0) | |
1926 | return true; | |
1927 | ||
1928 | /* Find size of the object */ | |
1929 | object_length = getReply()->content_length; | |
1930 | ||
1931 | if (object_length < 0) | |
b37bde1e | 1932 | object_length = contentLen(); |
0655fa4d | 1933 | |
1934 | if (mod_time > request->ims) { | |
bf8fe701 | 1935 | debugs(88, 3, "--> YES: entry newer than client"); |
0655fa4d | 1936 | return true; |
1937 | } else if (mod_time < request->ims) { | |
bf8fe701 | 1938 | debugs(88, 3, "--> NO: entry older than client"); |
0655fa4d | 1939 | return false; |
1940 | } else if (request->imslen < 0) { | |
bf8fe701 | 1941 | debugs(88, 3, "--> NO: same LMT, no client length"); |
0655fa4d | 1942 | return false; |
1943 | } else if (request->imslen == object_length) { | |
bf8fe701 | 1944 | debugs(88, 3, "--> NO: same LMT, same length"); |
0655fa4d | 1945 | return false; |
1946 | } else { | |
bf8fe701 | 1947 | debugs(88, 3, "--> YES: same LMT, different length"); |
0655fa4d | 1948 | return true; |
1949 | } | |
1950 | } | |
1951 | ||
79c8035e AR |
1952 | bool |
1953 | StoreEntry::hasIfMatchEtag(const HttpRequest &request) const | |
1954 | { | |
1955 | const String reqETags = request.header.getList(HDR_IF_MATCH); | |
1956 | return hasOneOfEtags(reqETags, false); | |
1957 | } | |
1958 | ||
1959 | bool | |
1960 | StoreEntry::hasIfNoneMatchEtag(const HttpRequest &request) const | |
1961 | { | |
1962 | const String reqETags = request.header.getList(HDR_IF_NONE_MATCH); | |
1963 | // weak comparison is allowed only for HEAD or full-body GET requests | |
1964 | const bool allowWeakMatch = !request.flags.range && | |
b59e6847 | 1965 | (request.method == METHOD_GET || request.method == METHOD_HEAD); |
79c8035e AR |
1966 | return hasOneOfEtags(reqETags, allowWeakMatch); |
1967 | } | |
1968 | ||
1969 | /// whether at least one of the request ETags matches entity ETag | |
1970 | bool | |
1971 | StoreEntry::hasOneOfEtags(const String &reqETags, const bool allowWeakMatch) const | |
1972 | { | |
1973 | const ETag repETag = getReply()->header.getETag(HDR_ETAG); | |
1974 | if (!repETag.str) | |
1975 | return strListIsMember(&reqETags, "*", ','); | |
1976 | ||
1977 | bool matched = false; | |
1978 | const char *pos = NULL; | |
1979 | const char *item; | |
1980 | int ilen; | |
1981 | while (!matched && strListGetItem(&reqETags, ',', &item, &ilen, &pos)) { | |
1982 | if (!strncmp(item, "*", ilen)) | |
1983 | matched = true; | |
1984 | else { | |
1985 | String str; | |
1986 | str.append(item, ilen); | |
1987 | ETag reqETag; | |
1988 | if (etagParseInit(&reqETag, str.termedBuf())) { | |
1989 | matched = allowWeakMatch ? etagIsWeakEqual(repETag, reqETag) : | |
b59e6847 | 1990 | etagIsStrongEqual(repETag, reqETag); |
79c8035e AR |
1991 | } |
1992 | } | |
1993 | } | |
1994 | return matched; | |
1995 | } | |
1996 | ||
7d3c4ca1 | 1997 | SwapDir::Pointer |
c8f4eac4 | 1998 | StoreEntry::store() const |
1999 | { | |
2000 | assert(0 <= swap_dirn && swap_dirn < Config.cacheSwap.n_configured); | |
2001 | return INDEXSD(swap_dirn); | |
2002 | } | |
2003 | ||
2004 | void | |
2005 | StoreEntry::unlink() | |
2006 | { | |
f58bb2f4 AR |
2007 | store()->unlink(*this); // implies disconnect() |
2008 | swap_filen = -1; | |
2009 | swap_dirn = -1; | |
2010 | swap_status = SWAPOUT_NONE; | |
c8f4eac4 | 2011 | } |
0655fa4d | 2012 | |
aa18a4ca | 2013 | /* |
2014 | * return true if the entry is in a state where | |
2015 | * it can accept more data (ie with write() method) | |
2016 | */ | |
2017 | bool | |
2018 | StoreEntry::isAccepting() const | |
2019 | { | |
2020 | if (STORE_PENDING != store_status) | |
2021 | return false; | |
2022 | ||
2023 | if (EBIT_TEST(flags, ENTRY_ABORTED)) | |
2024 | return false; | |
2025 | ||
2026 | return true; | |
2027 | } | |
2028 | ||
2c4cd1ad AR |
2029 | std::ostream &operator <<(std::ostream &os, const StoreEntry &e) |
2030 | { | |
2031 | return os << e.swap_filen << '@' << e.swap_dirn << '=' << | |
9199139f AR |
2032 | e.mem_status << '/' << e.ping_status << '/' << e.store_status << '/' << |
2033 | e.swap_status; | |
2c4cd1ad AR |
2034 | } |
2035 | ||
e6ccf245 | 2036 | /* NullStoreEntry */ |
2037 | ||
2038 | NullStoreEntry NullStoreEntry::_instance; | |
2039 | ||
2040 | NullStoreEntry * | |
2041 | NullStoreEntry::getInstance() | |
2042 | { | |
2043 | return &_instance; | |
2044 | } | |
332dafa2 | 2045 | |
2046 | char const * | |
2047 | NullStoreEntry::getMD5Text() const | |
2048 | { | |
2049 | return "N/A"; | |
2050 | } | |
528b2c61 | 2051 | |
43ae1d95 | 2052 | void |
2053 | NullStoreEntry::operator delete(void*) | |
2054 | { | |
2055 | fatal ("Attempt to delete NullStoreEntry\n"); | |
2056 | } | |
2057 | ||
528b2c61 | 2058 | char const * |
2059 | NullStoreEntry::getSerialisedMetaData() | |
2060 | { | |
2061 | return NULL; | |
2062 | } | |
2063 | ||
32d002cb | 2064 | #if !_USE_INLINE_ |
528b2c61 | 2065 | #include "Store.cci" |
2066 | #endif |