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9cef6668 | 1 | |
2 | /* | |
b001e822 | 3 | * $Id: store_client.cc,v 1.135 2004/08/30 05:12:31 robertc Exp $ |
9cef6668 | 4 | * |
2f44bd34 | 5 | * DEBUG: section 90 Storage Manager Client-Side Interface |
9cef6668 | 6 | * AUTHOR: Duane Wessels |
7 | * | |
2b6662ba | 8 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
9cef6668 | 9 | * ---------------------------------------------------------- |
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. | |
9cef6668 | 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. | |
24 | * | |
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. | |
29 | * | |
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 | |
32 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. | |
33 | * | |
2f44bd34 | 34 | * Portions copyright (c) 2003 Robert Collins <robertc@squid-cache.org> |
9cef6668 | 35 | */ |
36 | ||
f09f5b26 | 37 | #include "squid.h" |
c8be6d7b | 38 | #include "StoreClient.h" |
e6ccf245 | 39 | #include "Store.h" |
528b2c61 | 40 | #include "HttpReply.h" |
41 | #include "MemObject.h" | |
42 | #include "StoreMeta.h" | |
43 | #include "StoreMetaUnpacker.h" | |
b67e2c8c | 44 | #if DELAY_POOLS |
45 | #include "DelayPools.h" | |
46 | #endif | |
a2ac85d9 | 47 | #include "HttpRequest.h" |
c8be6d7b | 48 | |
e3ef2b09 | 49 | /* |
50 | * NOTE: 'Header' refers to the swapfile metadata header. | |
528b2c61 | 51 | * 'OBJHeader' refers to the object header, with cannonical |
52 | * processed object headers (which may derive from FTP/HTTP etc | |
53 | * upstream protocols | |
e3ef2b09 | 54 | * 'Body' refers to the swapfile body, which is the full |
55 | * HTTP reply (including HTTP headers and body). | |
56 | */ | |
2391a162 | 57 | static STRCB storeClientReadBody; |
58 | static STRCB storeClientReadHeader; | |
f09f5b26 | 59 | static void storeClientCopy2(StoreEntry * e, store_client * sc); |
d6f51e3c | 60 | static EVH storeClientCopyEvent; |
77b32a34 | 61 | static int CheckQuickAbort2(StoreEntry * entry); |
62 | static void CheckQuickAbort(StoreEntry * entry); | |
f09f5b26 | 63 | |
b001e822 | 64 | CBDATA_CLASS_INIT(store_client); |
528b2c61 | 65 | |
66 | void * | |
b001e822 | 67 | store_client::operator new (size_t) |
528b2c61 | 68 | { |
528b2c61 | 69 | CBDATA_INIT_TYPE(store_client); |
b001e822 | 70 | store_client *result = cbdataAlloc(store_client); |
71 | return result; | |
528b2c61 | 72 | } |
73 | ||
74 | void | |
75 | store_client::operator delete (void *address) | |
76 | { | |
b001e822 | 77 | store_client *t = static_cast<store_client *>(address); |
78 | cbdataFree(t); | |
528b2c61 | 79 | } |
80 | ||
81 | bool | |
82 | store_client::memReaderHasLowerOffset(off_t anOffset) const | |
83 | { | |
84 | return getType() == STORE_MEM_CLIENT && copyInto.offset < anOffset; | |
85 | } | |
86 | ||
87 | int | |
88 | store_client::getType() const | |
89 | { | |
90 | return type; | |
91 | } | |
92 | ||
06d2839d | 93 | #if STORE_CLIENT_LIST_DEBUG |
fa80a8ef | 94 | static store_client * |
f09f5b26 | 95 | storeClientListSearch(const MemObject * mem, void *data) |
96 | { | |
06d2839d | 97 | dlink_node *node; |
98 | store_client *sc = NULL; | |
62e76326 | 99 | |
06d2839d | 100 | for (node = mem->clients.head; node; node = node->next) { |
62e76326 | 101 | sc = node->data; |
102 | ||
103 | if (sc->owner == data) | |
104 | return sc; | |
f09f5b26 | 105 | } |
62e76326 | 106 | |
06d2839d | 107 | return NULL; |
f09f5b26 | 108 | } |
c8be6d7b | 109 | |
110 | int | |
111 | storeClientIsThisAClient(store_client * sc, void *someClient) | |
112 | { | |
113 | return sc->owner == someClient; | |
114 | } | |
62e76326 | 115 | |
06d2839d | 116 | #endif |
924f73bc | 117 | #include "HttpRequest.h" |
f09f5b26 | 118 | |
119 | /* add client with fd to client list */ | |
06d2839d | 120 | store_client * |
f09f5b26 | 121 | storeClientListAdd(StoreEntry * e, void *data) |
122 | { | |
123 | MemObject *mem = e->mem_obj; | |
f09f5b26 | 124 | store_client *sc; |
125 | assert(mem); | |
06d2839d | 126 | #if STORE_CLIENT_LIST_DEBUG |
62e76326 | 127 | |
f09f5b26 | 128 | if (storeClientListSearch(mem, data) != NULL) |
62e76326 | 129 | /* XXX die! */ |
130 | assert(1 == 0); | |
131 | ||
6b8e7481 | 132 | #endif |
62e76326 | 133 | |
528b2c61 | 134 | sc = new store_client (e); |
62e76326 | 135 | |
528b2c61 | 136 | mem->addClient(sc); |
62e76326 | 137 | |
06d2839d | 138 | return sc; |
f09f5b26 | 139 | } |
140 | ||
528b2c61 | 141 | void |
142 | store_client::callback(ssize_t sz, bool error) | |
b04e66e0 | 143 | { |
528b2c61 | 144 | StoreIOBuffer result (sz, 0 ,copyInto.data); |
62e76326 | 145 | |
c8be6d7b | 146 | if (sz < 0) { |
62e76326 | 147 | result.flags.error = 1; |
148 | result.length = 0; | |
528b2c61 | 149 | } else { |
62e76326 | 150 | result.flags.error = error ? 1 : 0; |
c8be6d7b | 151 | } |
62e76326 | 152 | |
528b2c61 | 153 | result.offset = cmp_offset; |
90703668 | 154 | assert(_callback.pending()); |
528b2c61 | 155 | cmp_offset = copyInto.offset + sz; |
156 | STCB *temphandler = _callback.callback_handler; | |
157 | void *cbdata = _callback.callback_data; | |
158 | _callback = Callback(NULL, NULL); | |
159 | copyInto.data = NULL; | |
62e76326 | 160 | |
528b2c61 | 161 | if (cbdataReferenceValid(cbdata)) |
62e76326 | 162 | temphandler(cbdata, result); |
163 | ||
528b2c61 | 164 | cbdataReferenceDone(cbdata); |
b04e66e0 | 165 | } |
166 | ||
f115fadd | 167 | static void |
168 | storeClientCopyEvent(void *data) | |
169 | { | |
e6ccf245 | 170 | store_client *sc = (store_client *)data; |
2f44bd34 | 171 | debug(90, 3)("storeClientCopyEvent: Running\n"); |
528b2c61 | 172 | assert (sc->flags.copy_event_pending); |
67fd69de | 173 | sc->flags.copy_event_pending = 0; |
62e76326 | 174 | |
90703668 | 175 | if (!sc->_callback.pending()) |
62e76326 | 176 | return; |
177 | ||
f115fadd | 178 | storeClientCopy2(sc->entry, sc); |
f115fadd | 179 | } |
180 | ||
b67e2c8c | 181 | store_client::store_client(StoreEntry *e) : entry (e) |
182 | #if DELAY_POOLS | |
62e76326 | 183 | , delayId() |
b67e2c8c | 184 | #endif |
62e76326 | 185 | , type (e->storeClientType()) |
186 | , object_ok(true) | |
528b2c61 | 187 | { |
188 | cmp_offset = 0; | |
189 | flags.disk_io_pending = 0; | |
190 | entry->refcount++; | |
62e76326 | 191 | |
528b2c61 | 192 | if (getType() == STORE_DISK_CLIENT) |
62e76326 | 193 | /* assert we'll be able to get the data we want */ |
194 | /* maybe we should open swapin_fd here */ | |
195 | assert(entry->swap_filen > -1 || storeSwapOutAble(entry)); | |
196 | ||
528b2c61 | 197 | #if STORE_CLIENT_LIST_DEBUG |
62e76326 | 198 | |
528b2c61 | 199 | owner = cbdataReference(data); |
62e76326 | 200 | |
528b2c61 | 201 | #endif |
202 | } | |
203 | ||
2f44bd34 | 204 | store_client::~store_client() |
62e76326 | 205 | {} |
2f44bd34 | 206 | |
f09f5b26 | 207 | /* copy bytes requested by the client */ |
208 | void | |
a4b8110e | 209 | storeClientCopy(store_client * sc, |
62e76326 | 210 | StoreEntry * e, |
211 | StoreIOBuffer copyInto, | |
212 | STCB * callback, | |
213 | void *data) | |
f09f5b26 | 214 | { |
528b2c61 | 215 | assert (sc != NULL); |
216 | sc->copy(e, copyInto,callback,data); | |
217 | } | |
218 | ||
219 | void | |
220 | store_client::copy(StoreEntry * anEntry, | |
62e76326 | 221 | StoreIOBuffer copyRequest, |
222 | STCB * callback_fn, | |
223 | void *data) | |
528b2c61 | 224 | { |
225 | assert (anEntry == entry); | |
226 | assert (callback_fn); | |
227 | assert (data); | |
228 | assert(!EBIT_TEST(entry->flags, ENTRY_ABORTED)); | |
2f44bd34 | 229 | debug(90, 3)("store_client::copy: %s, from %lu, for length %d, cb %p, cbdata %p", |
62e76326 | 230 | entry->getMD5Text(), |
231 | (unsigned long) copyRequest.offset, | |
232 | (int) copyRequest.length, | |
233 | callback_fn, | |
234 | data); | |
06d2839d | 235 | #if STORE_CLIENT_LIST_DEBUG |
62e76326 | 236 | |
528b2c61 | 237 | assert(this == storeClientListSearch(entry->mem_obj, data)); |
06d2839d | 238 | #endif |
62e76326 | 239 | |
90703668 | 240 | assert(!_callback.pending()); |
528b2c61 | 241 | #if ONLYCONTIGUOUSREQUESTS |
62e76326 | 242 | |
528b2c61 | 243 | assert(cmp_offset == copyRequest.offset); |
244 | #endif | |
245 | /* range requests will skip into the body */ | |
246 | cmp_offset = copyRequest.offset; | |
247 | _callback = Callback (callback_fn, cbdataReference(data)); | |
248 | copyInto.data = copyRequest.data; | |
249 | copyInto.length = copyRequest.length; | |
250 | copyInto.offset = copyRequest.offset; | |
251 | ||
1d5161bd | 252 | static bool copying (false); |
253 | assert (!copying); | |
254 | copying = true; | |
255 | PROF_start(storeClient_kickReads); | |
a46d2c0e | 256 | /* we might be blocking comm reads due to readahead limits |
257 | * now we have a new offset, trigger those reads... | |
258 | */ | |
259 | entry->mem_obj->kickReads(); | |
1d5161bd | 260 | PROF_stop(storeClient_kickReads); |
261 | copying = false; | |
a46d2c0e | 262 | |
528b2c61 | 263 | storeClientCopy2(entry, this); |
f09f5b26 | 264 | } |
265 | ||
07304bf9 | 266 | /* |
267 | * This function is used below to decide if we have any more data to | |
0bb129ee | 268 | * send to the client. If the store_status is STORE_PENDING, then we |
b7fe0ab0 | 269 | * do have more data to send. If its STORE_OK, then |
0bb129ee | 270 | * we continue checking. If the object length is negative, then we |
271 | * don't know the real length and must open the swap file to find out. | |
272 | * If the length is >= 0, then we compare it to the requested copy | |
273 | * offset. | |
07304bf9 | 274 | */ |
275 | static int | |
276 | storeClientNoMoreToSend(StoreEntry * e, store_client * sc) | |
277 | { | |
278 | ssize_t len; | |
62e76326 | 279 | |
0bb129ee | 280 | if (e->store_status == STORE_PENDING) |
62e76326 | 281 | return 0; |
282 | ||
07304bf9 | 283 | if ((len = objectLen(e)) < 0) |
62e76326 | 284 | return 0; |
285 | ||
c8be6d7b | 286 | if (sc->copyInto.offset < len) |
62e76326 | 287 | return 0; |
288 | ||
07304bf9 | 289 | return 1; |
290 | } | |
291 | ||
f09f5b26 | 292 | static void |
293 | storeClientCopy2(StoreEntry * e, store_client * sc) | |
294 | { | |
528b2c61 | 295 | /* reentrancy not allowed - note this could lead to |
296 | * dropped events | |
297 | */ | |
62e76326 | 298 | |
fa80a8ef | 299 | if (sc->flags.copy_event_pending) { |
62e76326 | 300 | return; |
fa80a8ef | 301 | } |
62e76326 | 302 | |
db1cd23c | 303 | if (EBIT_TEST(e->flags, ENTRY_FWD_HDR_WAIT)) { |
62e76326 | 304 | debug(90, 5)("storeClientCopy2: returning because ENTRY_FWD_HDR_WAIT set\n"); |
305 | return; | |
db1cd23c | 306 | } |
62e76326 | 307 | |
67fd69de | 308 | if (sc->flags.store_copying) { |
62e76326 | 309 | sc->flags.copy_event_pending = 1; |
310 | debug(90, 3)("storeClientCopy2: Queueing storeClientCopyEvent()\n"); | |
311 | eventAdd("storeClientCopyEvent", storeClientCopyEvent, sc, 0.0, 0); | |
312 | return; | |
67fd69de | 313 | } |
62e76326 | 314 | |
2f44bd34 | 315 | debug(90, 3)("storeClientCopy2: %s\n", e->getMD5Text()); |
90703668 | 316 | assert(sc->_callback.pending()); |
0bb129ee | 317 | /* |
b7fe0ab0 | 318 | * We used to check for ENTRY_ABORTED here. But there were some |
0bb129ee | 319 | * problems. For example, we might have a slow client (or two) and |
320 | * the server-side is reading far ahead and swapping to disk. Even | |
321 | * if the server-side aborts, we want to give the client(s) | |
322 | * everything we got before the abort condition occurred. | |
323 | */ | |
528b2c61 | 324 | /* Warning: doCopy may indirectly free itself in callbacks, |
fa80a8ef | 325 | * hence the cbdata reference to keep it active for the duration of |
326 | * this function | |
327 | */ | |
528b2c61 | 328 | cbdataReference(sc); |
329 | assert (sc->flags.store_copying == 0); | |
330 | sc->doCopy(e); | |
331 | assert (sc->flags.store_copying == 0); | |
332 | cbdataReferenceDone(sc); | |
cfac48c2 | 333 | } |
334 | ||
528b2c61 | 335 | void |
336 | store_client::doCopy(StoreEntry *anEntry) | |
cfac48c2 | 337 | { |
528b2c61 | 338 | assert (anEntry == entry); |
339 | flags.store_copying = 1; | |
340 | MemObject *mem = entry->mem_obj; | |
cd748f27 | 341 | |
528b2c61 | 342 | debug(33, 5)("store_client::doCopy: co: %lu, hi: %ld\n", (unsigned long) copyInto.offset, (long int) mem->endOffset()); |
add2192d | 343 | |
528b2c61 | 344 | if (storeClientNoMoreToSend(entry, this)) { |
62e76326 | 345 | /* There is no more to send! */ |
346 | callback(0); | |
347 | flags.store_copying = 0; | |
348 | return; | |
cfac48c2 | 349 | } |
62e76326 | 350 | |
add2192d | 351 | /* Check that we actually have data */ |
528b2c61 | 352 | if (anEntry->store_status == STORE_PENDING && copyInto.offset >= mem->endOffset()) { |
62e76326 | 353 | debug(90, 3)("store_client::doCopy: Waiting for more\n"); |
354 | flags.store_copying = 0; | |
355 | return; | |
cfac48c2 | 356 | } |
62e76326 | 357 | |
cfac48c2 | 358 | /* |
359 | * Slight weirdness here. We open a swapin file for any | |
360 | * STORE_DISK_CLIENT, even if we can copy the requested chunk | |
361 | * from memory in the next block. We must try to open the | |
362 | * swapin file before sending any data to the client side. If | |
363 | * we postpone the open, and then can not open the file later | |
364 | * on, the client loses big time. Its transfer just gets cut | |
365 | * off. Better to open it early (while the client side handler | |
366 | * is clientCacheHit) so that we can fall back to a cache miss | |
367 | * if needed. | |
368 | */ | |
fa80a8ef | 369 | |
4e70dae3 | 370 | if (STORE_DISK_CLIENT == getType() && NULL == swapin_sio.getRaw()) |
371 | startSwapin(); | |
372 | else | |
373 | scheduleRead(); | |
374 | } | |
375 | ||
376 | void | |
377 | store_client::startSwapin() | |
378 | { | |
379 | debug(90, 3)("store_client::doCopy: Need to open swap in file\n"); | |
380 | /* gotta open the swapin file */ | |
381 | ||
382 | if (storeTooManyDiskFilesOpen()) { | |
383 | /* yuck -- this causes a TCP_SWAPFAIL_MISS on the client side */ | |
384 | fail(); | |
385 | flags.store_copying = 0; | |
386 | return; | |
387 | } else if (!flags.disk_io_pending) { | |
388 | /* Don't set store_io_pending here */ | |
389 | storeSwapInStart(this); | |
62e76326 | 390 | |
4e70dae3 | 391 | if (NULL == swapin_sio.getRaw()) { |
62e76326 | 392 | fail(); |
393 | flags.store_copying = 0; | |
394 | return; | |
62e76326 | 395 | } |
62e76326 | 396 | |
4e70dae3 | 397 | /* |
398 | * If the open succeeds we either copy from memory, or | |
399 | * schedule a disk read in the next block. | |
400 | */ | |
401 | scheduleRead(); | |
402 | ||
403 | return; | |
404 | } else { | |
405 | debug (90, 1)("WARNING: Averted multiple fd operation (1)\n"); | |
62e76326 | 406 | flags.store_copying = 0; |
407 | return; | |
cfac48c2 | 408 | } |
4e70dae3 | 409 | } |
62e76326 | 410 | |
4e70dae3 | 411 | void |
412 | store_client::scheduleRead() | |
413 | { | |
414 | MemObject *mem = entry->mem_obj; | |
415 | ||
416 | if (copyInto.offset >= mem->inmem_lo && copyInto.offset < mem->endOffset()) | |
417 | scheduleMemRead(); | |
418 | else | |
419 | scheduleDiskRead(); | |
420 | } | |
421 | ||
422 | void | |
423 | store_client::scheduleDiskRead() | |
424 | { | |
cd748f27 | 425 | /* What the client wants is not in memory. Schedule a disk read */ |
528b2c61 | 426 | assert(STORE_DISK_CLIENT == getType()); |
62e76326 | 427 | |
528b2c61 | 428 | assert(!flags.disk_io_pending); |
62e76326 | 429 | |
2f44bd34 | 430 | debug(90, 3)("store_client::doCopy: reading from STORE\n"); |
62e76326 | 431 | |
528b2c61 | 432 | fileRead(); |
62e76326 | 433 | |
528b2c61 | 434 | flags.store_copying = 0; |
f09f5b26 | 435 | } |
436 | ||
4e70dae3 | 437 | void |
438 | store_client::scheduleMemRead() | |
439 | { | |
440 | /* What the client wants is in memory */ | |
441 | /* Old style */ | |
442 | debug(90, 3)("store_client::doCopy: Copying normal from memory\n"); | |
90703668 | 443 | size_t sz = entry->mem_obj->data_hdr.copy(copyInto); |
4e70dae3 | 444 | callback(sz); |
445 | flags.store_copying = 0; | |
446 | } | |
447 | ||
528b2c61 | 448 | void |
449 | store_client::fileRead() | |
f09f5b26 | 450 | { |
528b2c61 | 451 | MemObject *mem = entry->mem_obj; |
452 | ||
90703668 | 453 | assert(_callback.pending()); |
528b2c61 | 454 | assert(!flags.disk_io_pending); |
455 | flags.disk_io_pending = 1; | |
62e76326 | 456 | |
528b2c61 | 457 | if (mem->swap_hdr_sz != 0) |
62e76326 | 458 | if (entry->swap_status == SWAPOUT_WRITING) |
459 | assert(mem->swapout.sio->offset() > copyInto.offset + (off_t)mem->swap_hdr_sz); | |
460 | ||
528b2c61 | 461 | storeRead(swapin_sio, |
62e76326 | 462 | copyInto.data, |
463 | copyInto.length, | |
464 | copyInto.offset + mem->swap_hdr_sz, | |
465 | mem->swap_hdr_sz == 0 ? storeClientReadHeader | |
466 | : storeClientReadBody, | |
467 | this); | |
f09f5b26 | 468 | } |
469 | ||
470 | static void | |
5bd1abac | 471 | storeClientReadBody(void *data, const char *buf, ssize_t len) |
f09f5b26 | 472 | { |
e6ccf245 | 473 | store_client *sc = (store_client *)data; |
27002b34 | 474 | assert(sc->flags.disk_io_pending); |
f115fadd | 475 | sc->flags.disk_io_pending = 0; |
90703668 | 476 | assert(sc->_callback.pending()); |
2f44bd34 | 477 | debug(90, 3)("storeClientReadBody: len %d", (int) len); |
62e76326 | 478 | |
528b2c61 | 479 | if (sc->copyInto.offset == 0 && len > 0 && sc->entry->getReply()->sline.status == 0) |
62e76326 | 480 | /* Our structure ! */ |
481 | if (!httpReplyParse((HttpReply *)sc->entry->getReply(), sc->copyInto.data, headersEnd(sc->copyInto.data, len))) { | |
482 | debug (90,0)("Could not parse headers from on disk object\n"); | |
483 | } | |
484 | ||
528b2c61 | 485 | sc->callback(len); |
486 | } | |
487 | ||
488 | void | |
62e76326 | 489 | store_client::fail() |
528b2c61 | 490 | { |
491 | object_ok = false; | |
db2ff94c | 492 | /* synchronous open failures callback from the store, |
493 | * before startSwapin detects the failure. | |
494 | * TODO: fix this inconsistent behaviour - probably by | |
495 | * having storeSwapInStart become a callback functions, | |
496 | * not synchronous | |
497 | */ | |
498 | ||
90703668 | 499 | if (_callback.pending()) |
db2ff94c | 500 | callback(0, true); |
f09f5b26 | 501 | } |
502 | ||
e3ef2b09 | 503 | static void |
5bd1abac | 504 | storeClientReadHeader(void *data, const char *buf, ssize_t len) |
e3ef2b09 | 505 | { |
e6ccf245 | 506 | store_client *sc = (store_client *)data; |
528b2c61 | 507 | sc->readHeader(buf, len); |
508 | } | |
509 | ||
510 | void | |
511 | store_client::unpackHeader(char const *buf, ssize_t len) | |
512 | { | |
2f44bd34 | 513 | debug(90, 3)("store_client::unpackHeader: len %d", (int) len); |
62e76326 | 514 | |
e3ef2b09 | 515 | if (len < 0) { |
62e76326 | 516 | debug(90, 3)("store_client::unpackHeader: %s", xstrerror()); |
517 | fail(); | |
518 | return; | |
e3ef2b09 | 519 | } |
62e76326 | 520 | |
528b2c61 | 521 | int swap_hdr_sz = 0; |
522 | StoreMetaUnpacker aBuilder(buf, len, &swap_hdr_sz); | |
62e76326 | 523 | |
528b2c61 | 524 | if (!aBuilder.isBufferSane()) { |
62e76326 | 525 | /* oops, bad disk file? */ |
526 | debug(90, 1) ("WARNING: swapfile header inconsistent with available data\n"); | |
527 | fail(); | |
528 | return; | |
9bc73deb | 529 | } |
62e76326 | 530 | |
528b2c61 | 531 | tlv *tlv_list = aBuilder.createStoreMeta (); |
62e76326 | 532 | |
e3ef2b09 | 533 | if (tlv_list == NULL) { |
62e76326 | 534 | debug(90, 1) ("WARNING: failed to unpack meta data\n"); |
535 | fail(); | |
536 | return; | |
e3ef2b09 | 537 | } |
62e76326 | 538 | |
e3ef2b09 | 539 | /* |
7e3ce7b9 | 540 | * Check the meta data and make sure we got the right object. |
e3ef2b09 | 541 | */ |
528b2c61 | 542 | for (tlv *t = tlv_list; t; t = t->next) { |
62e76326 | 543 | if (!t->checkConsistency(entry)) { |
544 | storeSwapTLVFree(tlv_list); | |
545 | fail(); | |
546 | return; | |
547 | } | |
7e3ce7b9 | 548 | } |
62e76326 | 549 | |
07304bf9 | 550 | storeSwapTLVFree(tlv_list); |
528b2c61 | 551 | |
552 | entry->mem_obj->swap_hdr_sz = swap_hdr_sz; | |
553 | entry->mem_obj->object_sz = entry->swap_file_sz - swap_hdr_sz; | |
554 | ||
555 | } | |
556 | ||
557 | void | |
558 | store_client::readHeader(char const *buf, ssize_t len) | |
559 | { | |
560 | MemObject *const mem = entry->mem_obj; | |
62e76326 | 561 | |
528b2c61 | 562 | assert(flags.disk_io_pending); |
563 | flags.disk_io_pending = 0; | |
90703668 | 564 | assert(_callback.pending()); |
528b2c61 | 565 | |
566 | unpackHeader (buf, len); | |
62e76326 | 567 | |
528b2c61 | 568 | if (!object_ok) |
62e76326 | 569 | return; |
570 | ||
e3ef2b09 | 571 | /* |
572 | * If our last read got some data the client wants, then give | |
573 | * it to them, otherwise schedule another read. | |
574 | */ | |
528b2c61 | 575 | size_t body_sz = len - mem->swap_hdr_sz; |
62e76326 | 576 | |
528b2c61 | 577 | if (static_cast<size_t>(copyInto.offset) < body_sz) { |
62e76326 | 578 | /* |
579 | * we have (part of) what they want | |
580 | */ | |
581 | size_t copy_sz = XMIN(copyInto.length, body_sz) | |
582 | ; | |
583 | debug(90, 3) ("storeClientReadHeader: copying %d bytes of body\n", | |
584 | (int) copy_sz); | |
585 | xmemmove(copyInto.data, copyInto.data + mem->swap_hdr_sz, copy_sz); | |
586 | ||
587 | if (copyInto.offset == 0 && len > 0 && entry->getReply()->sline.status == 0) | |
588 | /* Our structure ! */ | |
589 | if (!httpReplyParse((HttpReply *)entry->getReply(), copyInto.data, | |
590 | headersEnd(copyInto.data, copy_sz))) { | |
591 | debug (90,0)("could not parse headers from on disk structure!\n"); | |
592 | } | |
528b2c61 | 593 | |
594 | callback(copy_sz); | |
62e76326 | 595 | return; |
e3ef2b09 | 596 | } |
62e76326 | 597 | |
e3ef2b09 | 598 | /* |
599 | * we don't have what the client wants, but at least we now | |
600 | * know the swap header size. | |
601 | */ | |
528b2c61 | 602 | fileRead(); |
e3ef2b09 | 603 | } |
604 | ||
f09f5b26 | 605 | int |
a4b8110e | 606 | storeClientCopyPending(store_client * sc, StoreEntry * e, void *data) |
f09f5b26 | 607 | { |
06d2839d | 608 | #if STORE_CLIENT_LIST_DEBUG |
609 | assert(sc == storeClientListSearch(e->mem_obj, data)); | |
edce4d98 | 610 | #endif |
611 | #ifndef SILLY_CODE | |
62e76326 | 612 | |
edce4d98 | 613 | assert(sc); |
06d2839d | 614 | #endif |
62e76326 | 615 | |
06d2839d | 616 | assert(sc->entry == e); |
edce4d98 | 617 | #if SILLY_CODE |
62e76326 | 618 | |
f09f5b26 | 619 | if (sc == NULL) |
62e76326 | 620 | return 0; |
621 | ||
edce4d98 | 622 | #endif |
62e76326 | 623 | |
90703668 | 624 | if (!sc->_callback.pending()) |
62e76326 | 625 | return 0; |
626 | ||
f09f5b26 | 627 | return 1; |
628 | } | |
629 | ||
06d2839d | 630 | /* |
631 | * This routine hasn't been optimised to take advantage of the | |
632 | * passed sc. Yet. | |
633 | */ | |
f09f5b26 | 634 | int |
a4b8110e | 635 | storeUnregister(store_client * sc, StoreEntry * e, void *data) |
f09f5b26 | 636 | { |
637 | MemObject *mem = e->mem_obj; | |
06d2839d | 638 | #if STORE_CLIENT_LIST_DEBUG |
62e76326 | 639 | |
06d2839d | 640 | assert(sc == storeClientListSearch(e->mem_obj, data)); |
641 | #endif | |
62e76326 | 642 | |
f09f5b26 | 643 | if (mem == NULL) |
62e76326 | 644 | return 0; |
645 | ||
2f44bd34 | 646 | debug(90, 3) ("storeUnregister: called for '%s'\n", e->getMD5Text()); |
62e76326 | 647 | |
2f44bd34 | 648 | if (sc == NULL) { |
62e76326 | 649 | debug(90, 3) ("storeUnregister: No matching client for '%s'\n", e->getMD5Text()); |
650 | return 0; | |
2f44bd34 | 651 | } |
62e76326 | 652 | |
0e3f3e0d | 653 | if (mem->clientCount() == 0) { |
62e76326 | 654 | debug(90, 3) ("storeUnregister: Consistency failure - store client being unregistered is not in the mem object's list for '%s'\n", e->getMD5Text()); |
655 | return 0; | |
2f44bd34 | 656 | } |
62e76326 | 657 | |
06d2839d | 658 | dlinkDelete(&sc->node, &mem->clients); |
f09f5b26 | 659 | mem->nclients--; |
62e76326 | 660 | |
f09f5b26 | 661 | if (e->store_status == STORE_OK && e->swap_status != SWAPOUT_DONE) |
62e76326 | 662 | storeSwapOut(e); |
663 | ||
d3b3ab85 | 664 | if (sc->swapin_sio.getRaw()) { |
62e76326 | 665 | storeClose(sc->swapin_sio); |
666 | sc->swapin_sio = NULL; | |
667 | statCounter.swap.ins++; | |
eb824054 | 668 | } |
62e76326 | 669 | |
90703668 | 670 | if (sc->_callback.pending()) { |
62e76326 | 671 | /* callback with ssize = -1 to indicate unexpected termination */ |
672 | debug(90, 3) ("storeUnregister: store_client for %s has a callback\n", | |
673 | mem->url); | |
674 | sc->fail(); | |
f09f5b26 | 675 | } |
62e76326 | 676 | |
fa80a8ef | 677 | #if STORE_CLIENT_LIST_DEBUG |
678 | cbdataReferenceDone(sc->owner); | |
62e76326 | 679 | |
fa80a8ef | 680 | #endif |
62e76326 | 681 | |
528b2c61 | 682 | delete sc; |
62e76326 | 683 | |
77b32a34 | 684 | assert(e->lock_count > 0); |
62e76326 | 685 | |
77b32a34 | 686 | if (mem->nclients == 0) |
62e76326 | 687 | CheckQuickAbort(e); |
a46d2c0e | 688 | else |
689 | mem->kickReads(); | |
62e76326 | 690 | |
f09f5b26 | 691 | return 1; |
692 | } | |
693 | ||
694 | off_t | |
695 | storeLowestMemReaderOffset(const StoreEntry * entry) | |
696 | { | |
528b2c61 | 697 | return entry->mem_obj->lowestMemReaderOffset(); |
f09f5b26 | 698 | } |
699 | ||
700 | /* Call handlers waiting for data to be appended to E. */ | |
701 | void | |
702 | InvokeHandlers(StoreEntry * e) | |
703 | { | |
528b2c61 | 704 | /* Commit what we can to disk, if appropriate */ |
705 | storeSwapOut (e); | |
f09f5b26 | 706 | int i = 0; |
707 | MemObject *mem = e->mem_obj; | |
708 | store_client *sc; | |
06d2839d | 709 | dlink_node *nx = NULL; |
710 | dlink_node *node; | |
711 | ||
2f44bd34 | 712 | debug(90, 3) ("InvokeHandlers: %s\n", e->getMD5Text()); |
f09f5b26 | 713 | /* walk the entire list looking for valid callbacks */ |
62e76326 | 714 | |
06d2839d | 715 | for (node = mem->clients.head; node; node = nx) { |
62e76326 | 716 | sc = (store_client *)node->data; |
717 | nx = node->next; | |
718 | debug(90, 3) ("InvokeHandlers: checking client #%d\n", i++); | |
719 | ||
90703668 | 720 | if (!sc->_callback.pending()) |
62e76326 | 721 | continue; |
722 | ||
723 | if (sc->flags.disk_io_pending) | |
724 | continue; | |
725 | ||
726 | storeClientCopy2(e, sc); | |
f09f5b26 | 727 | } |
728 | } | |
729 | ||
730 | int | |
731 | storePendingNClients(const StoreEntry * e) | |
732 | { | |
f09f5b26 | 733 | MemObject *mem = e->mem_obj; |
36547bcf | 734 | int npend = NULL == mem ? 0 : mem->nclients; |
2f44bd34 | 735 | debug(90, 3) ("storePendingNClients: returning %d\n", npend); |
f09f5b26 | 736 | return npend; |
737 | } | |
77b32a34 | 738 | |
739 | /* return 1 if the request should be aborted */ | |
740 | static int | |
741 | CheckQuickAbort2(StoreEntry * entry) | |
742 | { | |
528b2c61 | 743 | MemObject * const mem = entry->mem_obj; |
77b32a34 | 744 | assert(mem); |
2f44bd34 | 745 | debug(90, 3) ("CheckQuickAbort2: entry=%p, mem=%p\n", entry, mem); |
62e76326 | 746 | |
0e5bd28f | 747 | if (mem->request && !mem->request->flags.cachable) { |
62e76326 | 748 | debug(90, 3) ("CheckQuickAbort2: YES !mem->request->flags.cachable\n"); |
749 | return 1; | |
77b32a34 | 750 | } |
62e76326 | 751 | |
77b32a34 | 752 | if (EBIT_TEST(entry->flags, KEY_PRIVATE)) { |
62e76326 | 753 | debug(90, 3) ("CheckQuickAbort2: YES KEY_PRIVATE\n"); |
754 | return 1; | |
77b32a34 | 755 | } |
62e76326 | 756 | |
90703668 | 757 | size_t expectlen = entry->getReply()->content_length + entry->getReply()->hdr_sz; |
0e3f3e0d | 758 | |
759 | if (expectlen < 0) | |
760 | /* expectlen is < 0 if *no* information about the object has been recieved */ | |
761 | return 1; | |
762 | ||
90703668 | 763 | size_t curlen = (size_t) mem->endOffset (); |
0e3f3e0d | 764 | |
90703668 | 765 | size_t minlen = (size_t) Config.quickAbort.min << 10; |
62e76326 | 766 | |
77b32a34 | 767 | if (minlen < 0) { |
62e76326 | 768 | debug(90, 3) ("CheckQuickAbort2: NO disabled\n"); |
769 | return 0; | |
77b32a34 | 770 | } |
62e76326 | 771 | |
77b32a34 | 772 | if (curlen > expectlen) { |
62e76326 | 773 | debug(90, 3) ("CheckQuickAbort2: YES bad content length\n"); |
774 | return 1; | |
77b32a34 | 775 | } |
62e76326 | 776 | |
77b32a34 | 777 | if ((expectlen - curlen) < minlen) { |
62e76326 | 778 | debug(90, 3) ("CheckQuickAbort2: NO only little more left\n"); |
779 | return 0; | |
77b32a34 | 780 | } |
62e76326 | 781 | |
77b32a34 | 782 | if ((expectlen - curlen) > (Config.quickAbort.max << 10)) { |
62e76326 | 783 | debug(90, 3) ("CheckQuickAbort2: YES too much left to go\n"); |
784 | return 1; | |
77b32a34 | 785 | } |
62e76326 | 786 | |
77b32a34 | 787 | if (expectlen < 100) { |
62e76326 | 788 | debug(90, 3) ("CheckQuickAbort2: NO avoid FPE\n"); |
789 | return 0; | |
77b32a34 | 790 | } |
62e76326 | 791 | |
e6ccf245 | 792 | if ((curlen / (expectlen / 100)) > (size_t)Config.quickAbort.pct) { |
62e76326 | 793 | debug(90, 3) ("CheckQuickAbort2: NO past point of no return\n"); |
794 | return 0; | |
77b32a34 | 795 | } |
62e76326 | 796 | |
2f44bd34 | 797 | debug(90, 3) ("CheckQuickAbort2: YES default, returning 1\n"); |
77b32a34 | 798 | return 1; |
799 | } | |
800 | ||
801 | static void | |
802 | CheckQuickAbort(StoreEntry * entry) | |
803 | { | |
528b2c61 | 804 | assert (entry); |
62e76326 | 805 | |
77b32a34 | 806 | if (storePendingNClients(entry) > 0) |
62e76326 | 807 | return; |
808 | ||
77b32a34 | 809 | if (entry->store_status != STORE_PENDING) |
62e76326 | 810 | return; |
811 | ||
986ebffc | 812 | if (EBIT_TEST(entry->flags, ENTRY_SPECIAL)) |
62e76326 | 813 | return; |
814 | ||
77b32a34 | 815 | if (CheckQuickAbort2(entry) == 0) |
62e76326 | 816 | return; |
817 | ||
7197b20d | 818 | storeAbort(entry); |
77b32a34 | 819 | } |
c8be6d7b | 820 | |
821 | void | |
528b2c61 | 822 | store_client::dumpStats(StoreEntry * output, int clientNumber) const |
c8be6d7b | 823 | { |
90703668 | 824 | if (_callback.pending()) |
62e76326 | 825 | return; |
826 | ||
528b2c61 | 827 | storeAppendPrintf(output, "\tClient #%d, %p\n", clientNumber, _callback.callback_data); |
62e76326 | 828 | |
c8be6d7b | 829 | storeAppendPrintf(output, "\t\tcopy_offset: %lu\n", |
62e76326 | 830 | (unsigned long) copyInto.offset); |
831 | ||
c8be6d7b | 832 | storeAppendPrintf(output, "\t\tcopy_size: %d\n", |
62e76326 | 833 | (int) copyInto.length); |
834 | ||
c8be6d7b | 835 | storeAppendPrintf(output, "\t\tflags:"); |
62e76326 | 836 | |
528b2c61 | 837 | if (flags.disk_io_pending) |
62e76326 | 838 | storeAppendPrintf(output, " disk_io_pending"); |
839 | ||
528b2c61 | 840 | if (flags.store_copying) |
62e76326 | 841 | storeAppendPrintf(output, " store_copying"); |
842 | ||
528b2c61 | 843 | if (flags.copy_event_pending) |
62e76326 | 844 | storeAppendPrintf(output, " copy_event_pending"); |
845 | ||
c8be6d7b | 846 | storeAppendPrintf(output, "\n"); |
528b2c61 | 847 | } |
c8be6d7b | 848 | |
528b2c61 | 849 | bool |
90703668 | 850 | store_client::Callback::pending() const |
528b2c61 | 851 | { |
90703668 | 852 | return callback_handler && callback_data; |
c8be6d7b | 853 | } |
528b2c61 | 854 | |
855 | store_client::Callback::Callback(STCB *function, void *data) : callback_handler(function), callback_data (data) {} | |
b67e2c8c | 856 | |
515ec4dc | 857 | #if DELAY_POOLS |
b67e2c8c | 858 | void |
859 | store_client::setDelayId(DelayId delay_id) | |
860 | { | |
861 | delayId = delay_id; | |
862 | } | |
62e76326 | 863 | |
515ec4dc | 864 | #endif |