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1 | #error COSS Support is not stable yet in Squid-3. Please do not use. | |
2 | /* | |
3 | * $Id$ | |
4 | * vim: set et : | |
5 | * | |
6 | * DEBUG: section 47 Store COSS Directory Routines | |
7 | * AUTHOR: Eric Stern | |
8 | * | |
9 | * SQUID Web Proxy Cache http://www.squid-cache.org/ | |
10 | * ---------------------------------------------------------- | |
11 | * | |
12 | * Squid is the result of efforts by numerous individuals from | |
13 | * the Internet community; see the CONTRIBUTORS file for full | |
14 | * details. Many organizations have provided support for Squid's | |
15 | * development; see the SPONSORS file for full details. Squid is | |
16 | * Copyrighted (C) 2001 by the Regents of the University of | |
17 | * California; see the COPYRIGHT file for full details. Squid | |
18 | * incorporates software developed and/or copyrighted by other | |
19 | * sources; see the CREDITS file for full details. | |
20 | * | |
21 | * This program is free software; you can redistribute it and/or modify | |
22 | * it under the terms of the GNU General Public License as published by | |
23 | * the Free Software Foundation; either version 2 of the License, or | |
24 | * (at your option) any later version. | |
25 | * | |
26 | * This program is distributed in the hope that it will be useful, | |
27 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
28 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
29 | * GNU General Public License for more details. | |
30 | * | |
31 | * You should have received a copy of the GNU General Public License | |
32 | * along with this program; if not, write to the Free Software | |
33 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. | |
34 | * | |
35 | */ | |
36 | ||
37 | #include "squid.h" | |
38 | #include "CossSwapDir.h" | |
39 | #include "Store.h" | |
40 | ||
41 | #include "store_coss.h" | |
42 | #include "event.h" | |
43 | #include "fde.h" | |
44 | #include "SwapDir.h" | |
45 | #include "StoreSwapLogData.h" | |
46 | #include "DiskIO/DiskIOModule.h" | |
47 | #include "DiskIO/DiskIOStrategy.h" | |
48 | #include "DiskIO/ReadRequest.h" | |
49 | #include "ConfigOption.h" | |
50 | #include "StoreFScoss.h" | |
51 | #include "Parsing.h" | |
52 | ||
53 | #define STORE_META_BUFSZ 4096 | |
54 | ||
55 | int n_coss_dirs = 0; | |
56 | /* static int last_coss_pick_index = -1; */ | |
57 | MemAllocator *coss_index_pool = NULL; | |
58 | ||
59 | typedef struct _RebuildState RebuildState; | |
60 | ||
61 | struct _RebuildState { | |
62 | CossSwapDir *sd; | |
63 | int n_read; | |
64 | FILE *log; | |
65 | int speed; | |
66 | ||
67 | struct { | |
68 | unsigned int clean:1; | |
69 | } flags; | |
70 | ||
71 | struct _store_rebuild_data counts; | |
72 | }; | |
73 | ||
74 | static char *storeCossDirSwapLogFile(SwapDir *, const char *); | |
75 | static EVH storeCossRebuildFromSwapLog; | |
76 | static StoreEntry *storeCossAddDiskRestore(CossSwapDir * SD, const cache_key * key, | |
77 | int file_number, | |
78 | uint64_t swap_file_sz, | |
79 | time_t expires, | |
80 | time_t timestamp, | |
81 | time_t lastref, | |
82 | time_t lastmod, | |
83 | u_int32_t refcount, | |
84 | u_int16_t flags, | |
85 | int clean); | |
86 | static void storeCossDirRebuild(CossSwapDir * sd); | |
87 | static void storeCossDirCloseTmpSwapLog(CossSwapDir * sd); | |
88 | static FILE *storeCossDirOpenTmpSwapLog(CossSwapDir *, int *, int *); | |
89 | ||
90 | static char * | |
91 | storeCossDirSwapLogFile(SwapDir * sd, const char *ext) | |
92 | { | |
93 | LOCAL_ARRAY(char, path, SQUID_MAXPATHLEN); | |
94 | LOCAL_ARRAY(char, pathtmp, SQUID_MAXPATHLEN); | |
95 | LOCAL_ARRAY(char, digit, 32); | |
96 | char *pathtmp2; | |
97 | ||
98 | if (Config.Log.swap) { | |
99 | xstrncpy(pathtmp, sd->path, SQUID_MAXPATHLEN - 64); | |
100 | pathtmp2 = pathtmp; | |
101 | ||
102 | while ((pathtmp2 = strchr(pathtmp2, '/')) != NULL) | |
103 | *pathtmp2 = '.'; | |
104 | ||
105 | while (strlen(pathtmp) && pathtmp[strlen(pathtmp) - 1] == '.') | |
106 | pathtmp[strlen(pathtmp) - 1] = '\0'; | |
107 | ||
108 | for (pathtmp2 = pathtmp; *pathtmp2 == '.'; pathtmp2++); | |
109 | snprintf(path, SQUID_MAXPATHLEN - 64, Config.Log.swap, pathtmp2); | |
110 | ||
111 | if (strncmp(path, Config.Log.swap, SQUID_MAXPATHLEN - 64) == 0) { | |
112 | strcat(path, "."); | |
113 | snprintf(digit, 32, "%02d", sd->index); | |
114 | strncat(path, digit, 3); | |
115 | } | |
116 | } else { | |
117 | xstrncpy(path, sd->path, SQUID_MAXPATHLEN - 64); | |
118 | strcat(path, "/swap.state"); | |
119 | } | |
120 | ||
121 | if (ext) | |
122 | strncat(path, ext, 16); | |
123 | ||
124 | return path; | |
125 | } | |
126 | ||
127 | void | |
128 | CossSwapDir::openLog() | |
129 | { | |
130 | char *logPath; | |
131 | logPath = storeCossDirSwapLogFile(this, NULL); | |
132 | swaplog_fd = file_open(logPath, O_WRONLY | O_CREAT | O_BINARY); | |
133 | ||
134 | if (swaplog_fd < 0) { | |
135 | debugs(47, 1, "" << logPath << ": " << xstrerror()); | |
136 | fatal("storeCossDirOpenSwapLog: Failed to open swap log."); | |
137 | } | |
138 | ||
139 | debugs(47, 3, "Cache COSS Dir #" << index << " log opened on FD " << swaplog_fd); | |
140 | } | |
141 | ||
142 | void | |
143 | CossSwapDir::closeLog() | |
144 | { | |
145 | if (swaplog_fd < 0) /* not open */ | |
146 | return; | |
147 | ||
148 | file_close(swaplog_fd); | |
149 | ||
150 | debugs(47, 3, "Cache COSS Dir #" << index << " log closed on FD " << swaplog_fd); | |
151 | ||
152 | swaplog_fd = -1; | |
153 | } | |
154 | ||
155 | void | |
156 | CossSwapDir::ioCompletedNotification() | |
157 | { | |
158 | if (theFile->error()) { | |
159 | debugs(47, 1, "" << path << ": " << xstrerror()); | |
160 | fatal("storeCossDirInit: Failed to open a COSS file."); | |
161 | } | |
162 | } | |
163 | ||
164 | void | |
165 | CossSwapDir::closeCompleted() | |
166 | { | |
167 | theFile = NULL; | |
168 | } | |
169 | ||
170 | void | |
171 | CossSwapDir::readCompleted(const char *buf, int len, int errflag, RefCount<ReadRequest> aRequest) | |
172 | { | |
173 | CossRead* cossRead= dynamic_cast<CossRead *>(aRequest.getRaw()); | |
174 | assert (cossRead); | |
175 | StoreIOState::Pointer sio = cossRead->sio; | |
176 | void *cbdata; | |
177 | StoreIOState::STRCB *callback = sio->read.callback; | |
178 | char *p; | |
179 | CossState *cstate = dynamic_cast<CossState *>(sio.getRaw()); | |
180 | ssize_t rlen; | |
181 | ||
182 | debugs(79, 3, "storeCossReadDone: fileno " << sio->swap_filen << ", len " << len); | |
183 | cstate->flags.reading = 0; | |
184 | ||
185 | if (errflag) { | |
186 | StoreFScoss::GetInstance().stats.read.fail++; | |
187 | ||
188 | if (errflag > 0) { | |
189 | errno = errflag; | |
190 | debugs(79, 1, "storeCossReadDone: error: " << xstrerror()); | |
191 | } else { | |
192 | debugs(79, 1, "storeCossReadDone: got failure (" << errflag << ")"); | |
193 | } | |
194 | ||
195 | rlen = -1; | |
196 | } else { | |
197 | StoreFScoss::GetInstance().stats.read.success++; | |
198 | ||
199 | if (cstate->readbuffer == NULL) { | |
200 | cstate->readbuffer = (char *)xmalloc(cstate->st_size); | |
201 | p = storeCossMemPointerFromDiskOffset(storeCossFilenoToDiskOffset(sio->swap_filen), | |
202 | NULL); | |
203 | xmemcpy(cstate->readbuffer, p, cstate->st_size); | |
204 | } | |
205 | ||
206 | sio->offset_ += len; | |
207 | xmemcpy(cstate->requestbuf, &cstate->readbuffer[cstate->requestoffset], | |
208 | cstate->requestlen); | |
209 | rlen = (size_t) cstate->requestlen; | |
210 | } | |
211 | ||
212 | assert(callback); | |
213 | sio->read.callback = NULL; | |
214 | ||
215 | if (cbdataReferenceValidDone(sio->read.callback_data, &cbdata)) | |
216 | callback(cbdata, cstate->requestbuf, rlen, sio); | |
217 | } | |
218 | ||
219 | void | |
220 | CossSwapDir::writeCompleted(int errflag, size_t len, RefCount<WriteRequest> writeRequest) | |
221 | { | |
222 | CossWrite* cossWrite= dynamic_cast<CossWrite *>(writeRequest.getRaw()); | |
223 | assert (cossWrite); | |
224 | ||
225 | debugs(79, 3, "storeCossWriteMemBufDone: buf " << cossWrite->membuf << ", len " << len); | |
226 | ||
227 | ||
228 | if (errflag) { | |
229 | StoreFScoss::GetInstance().stats.stripe_write.fail++; | |
230 | debugs(79, 1, "storeCossWriteMemBufDone: got failure (" << errflag << ")"); | |
231 | debugs(79, 1, "size=" << cossWrite->membuf->diskend - cossWrite->membuf->diskstart); | |
232 | } else { | |
233 | StoreFScoss::GetInstance().stats.stripe_write.success++; | |
234 | } | |
235 | ||
236 | ||
237 | dlinkDelete(&cossWrite->membuf->node, &membufs); | |
238 | cbdataFree(cossWrite->membuf); | |
239 | StoreFScoss::GetInstance().stats.stripes--; | |
240 | } | |
241 | ||
242 | void | |
243 | CossSwapDir::changeIO(DiskIOModule *module) | |
244 | { | |
245 | DiskIOStrategy *anIO = module->createStrategy(); | |
246 | safe_free(ioModule); | |
247 | ioModule = xstrdup(module->type()); | |
248 | ||
249 | delete io; | |
250 | io = anIO; | |
251 | /* Change the IO Options */ | |
252 | ||
253 | if (currentIOOptions == NULL) | |
254 | currentIOOptions = new ConfigOptionVector(); | |
255 | ||
256 | if (currentIOOptions->options.size() > 3) | |
257 | delete currentIOOptions->options.pop_back(); | |
258 | ||
259 | /* TODO: factor out these 4 lines */ | |
260 | ConfigOption *ioOptions = NULL; | |
261 | ||
262 | if (io) | |
263 | ioOptions = io->getOptionTree(); | |
264 | ||
265 | if (ioOptions) | |
266 | currentIOOptions->options.push_back(ioOptions); | |
267 | } | |
268 | ||
269 | bool | |
270 | CossSwapDir::optionIOParse(char const *option, const char *value, int reconfiguring) | |
271 | { | |
272 | if (strcmp(option, "IOEngine") != 0) | |
273 | return false; | |
274 | ||
275 | if (reconfiguring) | |
276 | /* silently ignore this */ | |
277 | return true; | |
278 | ||
279 | if (!value) | |
280 | self_destruct(); | |
281 | ||
282 | DiskIOModule *module = DiskIOModule::Find(value); | |
283 | ||
284 | if (!module) | |
285 | self_destruct(); | |
286 | ||
287 | changeIO(module); | |
288 | ||
289 | return true; | |
290 | } | |
291 | ||
292 | void | |
293 | CossSwapDir::optionIODump(StoreEntry * e) const | |
294 | { | |
295 | storeAppendPrintf(e, " IOEngine=%s", ioModule); | |
296 | } | |
297 | ||
298 | ConfigOption * | |
299 | CossSwapDir::getOptionTree() const | |
300 | { | |
301 | ConfigOption *parentResult = SwapDir::getOptionTree(); | |
302 | ||
303 | if (currentIOOptions == NULL) | |
304 | currentIOOptions = new ConfigOptionVector(); | |
305 | ||
306 | currentIOOptions->options.push_back(parentResult); | |
307 | ||
308 | currentIOOptions->options.push_back(new ConfigOptionAdapter<CossSwapDir>(*const_cast<CossSwapDir *>(this), &CossSwapDir::optionIOParse, &CossSwapDir::optionIODump)); | |
309 | ||
310 | currentIOOptions->options.push_back( | |
311 | new ConfigOptionAdapter<CossSwapDir>(*const_cast<CossSwapDir *>(this), | |
312 | &CossSwapDir::optionBlockSizeParse, | |
313 | &CossSwapDir::optionBlockSizeDump)); | |
314 | ||
315 | ||
316 | ConfigOption *ioOptions = NULL; | |
317 | ||
318 | if (io) | |
319 | ioOptions = io->getOptionTree(); | |
320 | ||
321 | if (ioOptions) | |
322 | currentIOOptions->options.push_back(ioOptions); | |
323 | ||
324 | ConfigOption* result = currentIOOptions; | |
325 | ||
326 | currentIOOptions = NULL; | |
327 | ||
328 | return result; | |
329 | } | |
330 | ||
331 | void | |
332 | CossSwapDir::init() | |
333 | { | |
334 | /* FIXME: SwapDirs aren't refcounted. We call IORequestor calls, which | |
335 | * are refcounted. SO, we up our count once to avoid implicit delete's. | |
336 | */ | |
337 | RefCountReference(); | |
338 | io->init(); | |
339 | openLog(); | |
340 | storeCossDirRebuild(this); | |
341 | theFile = io->newFile(stripePath()); | |
342 | theFile->open(O_RDWR | O_CREAT, 0644, this); | |
343 | ||
344 | ++n_coss_dirs; | |
345 | /* | |
346 | * fs.blksize is normally determined by calling statvfs() etc, | |
347 | * but we just set it here. It is used in accounting the | |
348 | * total store size, and is reported in cachemgr 'storedir' | |
349 | * page. | |
350 | */ | |
351 | fs.blksize = 1 << blksz_bits; | |
352 | } | |
353 | ||
354 | void | |
355 | storeCossRemove(CossSwapDir * sd, StoreEntry * e) | |
356 | { | |
357 | CossIndexNode *coss_node = (CossIndexNode *)e->repl.data; | |
358 | e->repl.data = NULL; | |
359 | dlinkDelete(&coss_node->node, &sd->cossindex); | |
360 | coss_index_pool->free(coss_node); | |
361 | sd->count -= 1; | |
362 | } | |
363 | ||
364 | void | |
365 | storeCossAdd(CossSwapDir * sd, StoreEntry * e) | |
366 | { | |
367 | CossIndexNode *coss_node = (CossIndexNode *)coss_index_pool->alloc(); | |
368 | assert(!e->repl.data); | |
369 | e->repl.data = coss_node; | |
370 | dlinkAdd(e, &coss_node->node, &sd->cossindex); | |
371 | sd->count += 1; | |
372 | } | |
373 | ||
374 | static void | |
375 | storeCossRebuildComplete(void *data) | |
376 | { | |
377 | RebuildState *rb = (RebuildState *)data; | |
378 | CossSwapDir *sd = rb->sd; | |
379 | sd->startMembuf(); | |
380 | StoreController::store_dirs_rebuilding--; | |
381 | storeCossDirCloseTmpSwapLog(rb->sd); | |
382 | storeRebuildComplete(&rb->counts); | |
383 | cbdataFree(rb); | |
384 | } | |
385 | ||
386 | static void | |
387 | storeCossRebuildFromSwapLog(void *data) | |
388 | { | |
389 | RebuildState *rb = (RebuildState *)data; | |
390 | StoreEntry *e = NULL; | |
391 | StoreSwapLogData s; | |
392 | size_t ss = sizeof(StoreSwapLogData); | |
393 | double x; | |
394 | assert(rb != NULL); | |
395 | /* load a number of objects per invocation */ | |
396 | ||
397 | for (int aCount = 0; aCount < rb->speed; aCount++) { | |
398 | if (fread(&s, ss, 1, rb->log) != 1) { | |
399 | debugs(47, 1, "Done reading " << rb->sd->path << " swaplog (" << rb->n_read << " entries)"); | |
400 | fclose(rb->log); | |
401 | rb->log = NULL; | |
402 | storeCossRebuildComplete(rb); | |
403 | return; | |
404 | } | |
405 | ||
406 | rb->n_read++; | |
407 | ||
408 | if (s.op <= SWAP_LOG_NOP) | |
409 | continue; | |
410 | ||
411 | if (s.op >= SWAP_LOG_MAX) | |
412 | continue; | |
413 | ||
414 | debugs(47, 3, "storeCossRebuildFromSwapLog: " << | |
415 | swap_log_op_str[(int) s.op] << " " << storeKeyText(s.key) << | |
416 | " "<< std::setfill('0') << std::hex << std::uppercase << | |
417 | std::setw(8) << s.swap_filen); | |
418 | ||
419 | if (s.op == SWAP_LOG_ADD) { | |
420 | (void) 0; | |
421 | } else if (s.op == SWAP_LOG_DEL) { | |
422 | /* Delete unless we already have a newer copy */ | |
423 | ||
424 | if ((e = rb->sd->get | |
425 | (s.key)) != NULL && s.lastref > e->lastref) { | |
426 | /* | |
427 | * Make sure we don't unlink the file, it might be | |
428 | * in use by a subsequent entry. Also note that | |
429 | * we don't have to subtract from store_swap_size | |
430 | * because adding to store_swap_size happens in | |
431 | * the cleanup procedure. | |
432 | */ | |
433 | e->expireNow(); | |
434 | e->releaseRequest(); | |
435 | ||
436 | if (e->swap_filen > -1) { | |
437 | e->swap_filen = -1; | |
438 | } | |
439 | ||
440 | e->release(); | |
441 | /* Fake an unlink here, this is a bad hack :( */ | |
442 | storeCossRemove(rb->sd, e); | |
443 | rb->counts.objcount--; | |
444 | rb->counts.cancelcount++; | |
445 | } | |
446 | continue; | |
447 | } else { | |
448 | x = log(static_cast<double>(++rb->counts.bad_log_op)) / log(10.0); | |
449 | ||
450 | if (0.0 == x - (double) | |
451 | (int) x) | |
452 | debugs(47, 1, "WARNING: " << rb->counts.bad_log_op << " invalid swap log entries found"); | |
453 | ||
454 | rb->counts.invalid++; | |
455 | ||
456 | continue; | |
457 | } | |
458 | ||
459 | if ((++rb->counts.scancount & 0xFFF) == 0) { | |
460 | ||
461 | struct stat sb; | |
462 | ||
463 | if (0 == fstat(fileno(rb->log), &sb)) | |
464 | storeRebuildProgress(rb->sd->index, | |
465 | (int) sb.st_size / ss, rb->n_read); | |
466 | } | |
467 | ||
468 | if (EBIT_TEST(s.flags, KEY_PRIVATE)) { | |
469 | rb->counts.badflags++; | |
470 | continue; | |
471 | } | |
472 | ||
473 | e = rb->sd->get | |
474 | (s.key); | |
475 | ||
476 | if (e) { | |
477 | /* key already exists, current entry is newer */ | |
478 | /* keep old, ignore new */ | |
479 | rb->counts.dupcount++; | |
480 | continue; | |
481 | } | |
482 | ||
483 | /* update store_swap_size */ | |
484 | rb->counts.objcount++; | |
485 | ||
486 | e = storeCossAddDiskRestore(rb->sd, s.key, | |
487 | s.swap_filen, | |
488 | s.swap_file_sz, | |
489 | s.expires, | |
490 | s.timestamp, | |
491 | s.lastref, | |
492 | s.lastmod, | |
493 | s.refcount, | |
494 | s.flags, | |
495 | (int) rb->flags.clean); | |
496 | ||
497 | storeDirSwapLog(e, SWAP_LOG_ADD); | |
498 | } | |
499 | ||
500 | eventAdd("storeCossRebuild", storeCossRebuildFromSwapLog, rb, 0.0, 1); | |
501 | } | |
502 | ||
503 | /* Add a new object to the cache with empty memory copy and pointer to disk | |
504 | * use to rebuild store from disk. */ | |
505 | static StoreEntry * | |
506 | storeCossAddDiskRestore(CossSwapDir * SD, const cache_key * key, | |
507 | int file_number, | |
508 | uint64_t swap_file_sz, | |
509 | time_t expires, | |
510 | time_t timestamp, | |
511 | time_t lastref, | |
512 | time_t lastmod, | |
513 | u_int32_t refcount, | |
514 | u_int16_t flags, | |
515 | int clean) | |
516 | { | |
517 | StoreEntry *e = NULL; | |
518 | debugs(47, 5, "storeCossAddDiskRestore: " << storeKeyText(key) << | |
519 | ", fileno="<< std::setfill('0') << std::hex << std::uppercase << | |
520 | std::setw(8) << file_number); | |
521 | ||
522 | /* if you call this you'd better be sure file_number is not | |
523 | * already in use! */ | |
524 | e = new StoreEntry(); | |
525 | e->store_status = STORE_OK; | |
526 | e->swap_dirn = SD->index; | |
527 | e->setMemStatus(NOT_IN_MEMORY); | |
528 | e->swap_status = SWAPOUT_DONE; | |
529 | e->swap_filen = file_number; | |
530 | e->swap_file_sz = swap_file_sz; | |
531 | e->lock_count = 0; | |
532 | e->lastref = lastref; | |
533 | e->timestamp = timestamp; | |
534 | e->expires = expires; | |
535 | e->lastmod = lastmod; | |
536 | e->refcount = refcount; | |
537 | e->flags = flags; | |
538 | EBIT_SET(e->flags, ENTRY_CACHABLE); | |
539 | EBIT_CLR(e->flags, RELEASE_REQUEST); | |
540 | EBIT_CLR(e->flags, KEY_PRIVATE); | |
541 | e->ping_status = PING_NONE; | |
542 | EBIT_CLR(e->flags, ENTRY_VALIDATED); | |
543 | e->hashInsert(key); /* do it after we clear KEY_PRIVATE */ | |
544 | storeCossAdd(SD, e); | |
545 | assert(e->swap_filen >= 0); | |
546 | return e; | |
547 | } | |
548 | ||
549 | CBDATA_TYPE(RebuildState); | |
550 | static void | |
551 | storeCossDirRebuild(CossSwapDir * sd) | |
552 | { | |
553 | RebuildState *rb; | |
554 | int clean = 0; | |
555 | int zero = 0; | |
556 | FILE *fp; | |
557 | CBDATA_INIT_TYPE(RebuildState); | |
558 | rb = cbdataAlloc(RebuildState); | |
559 | rb->sd = sd; | |
560 | rb->speed = opt_foreground_rebuild ? 1 << 30 : 50; | |
561 | rb->flags.clean = (unsigned int) clean; | |
562 | /* | |
563 | * If the swap.state file exists in the cache_dir, then | |
564 | * we'll use storeCossRebuildFromSwapLog(). | |
565 | */ | |
566 | fp = storeCossDirOpenTmpSwapLog(sd, &clean, &zero); | |
567 | debugs(47, 1, "Rebuilding COSS storage in " << sd->path << " (" << (clean ? "CLEAN" : "DIRTY") << ")"); | |
568 | rb->log = fp; | |
569 | StoreController::store_dirs_rebuilding++; | |
570 | ||
571 | if (!clean || fp == NULL) { | |
572 | /* COSS cannot yet rebuild from a dirty state. If the log | |
573 | * is dirty then the COSS contents is thrown away. | |
574 | * Why? I guess it is because some contents will be lost, | |
575 | * and COSS cannot verify this.. | |
576 | */ | |
577 | ||
578 | if (fp != NULL) | |
579 | fclose(fp); | |
580 | ||
581 | /* | |
582 | * XXX Make sure we don't trigger an assertion if this is the first | |
583 | * storedir, since if we are, this call will cause storeRebuildComplete | |
584 | * to prematurely complete the rebuild process, and then some other | |
585 | * storedir will try to rebuild and eventually die. | |
586 | */ | |
587 | eventAdd("storeCossRebuildComplete", storeCossRebuildComplete, rb, 0.0, 0); | |
588 | ||
589 | return; | |
590 | } | |
591 | ||
592 | eventAdd("storeCossRebuild", storeCossRebuildFromSwapLog, rb, 0.0, 1); | |
593 | } | |
594 | ||
595 | static void | |
596 | storeCossDirCloseTmpSwapLog(CossSwapDir * sd) | |
597 | { | |
598 | char *swaplog_path = xstrdup(storeCossDirSwapLogFile(sd, NULL)); | |
599 | char *new_path = xstrdup(storeCossDirSwapLogFile(sd, ".new")); | |
600 | int anfd; | |
601 | file_close(sd->swaplog_fd); | |
602 | ||
603 | if (xrename(new_path, swaplog_path) < 0) { | |
604 | fatal("storeCossDirCloseTmpSwapLog: rename failed"); | |
605 | } | |
606 | ||
607 | anfd = file_open(swaplog_path, O_WRONLY | O_CREAT | O_BINARY); | |
608 | ||
609 | if (anfd < 0) { | |
610 | debugs(50, 1, "" << swaplog_path << ": " << xstrerror()); | |
611 | fatal("storeCossDirCloseTmpSwapLog: Failed to open swap log."); | |
612 | } | |
613 | ||
614 | safe_free(swaplog_path); | |
615 | safe_free(new_path); | |
616 | sd->swaplog_fd = anfd; | |
617 | debugs(47, 3, "Cache COSS Dir #" << sd->index << " log opened on FD " << anfd); | |
618 | } | |
619 | ||
620 | static FILE * | |
621 | storeCossDirOpenTmpSwapLog(CossSwapDir * sd, int *clean_flag, int *zero_flag) | |
622 | { | |
623 | char *swaplog_path = xstrdup(storeCossDirSwapLogFile(sd, NULL)); | |
624 | char *clean_path = xstrdup(storeCossDirSwapLogFile(sd, ".last-clean")); | |
625 | char *new_path = xstrdup(storeCossDirSwapLogFile(sd, ".new")); | |
626 | ||
627 | struct stat log_sb; | |
628 | ||
629 | struct stat clean_sb; | |
630 | FILE *fp; | |
631 | int anfd; | |
632 | ||
633 | if (::stat(swaplog_path, &log_sb) < 0) { | |
634 | debugs(50, 1, "Cache COSS Dir #" << sd->index << ": No log file"); | |
635 | safe_free(swaplog_path); | |
636 | safe_free(clean_path); | |
637 | safe_free(new_path); | |
638 | return NULL; | |
639 | } | |
640 | ||
641 | *zero_flag = log_sb.st_size == 0 ? 1 : 0; | |
642 | /* close the existing write-only FD */ | |
643 | ||
644 | if (sd->swaplog_fd >= 0) | |
645 | file_close(sd->swaplog_fd); | |
646 | ||
647 | /* open a write-only FD for the new log */ | |
648 | anfd = file_open(new_path, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY); | |
649 | ||
650 | if (anfd < 0) { | |
651 | debugs(50, 1, "" << new_path << ": " << xstrerror()); | |
652 | fatal("storeDirOpenTmpSwapLog: Failed to open swap log."); | |
653 | } | |
654 | ||
655 | sd->swaplog_fd = anfd; | |
656 | /* open a read-only stream of the old log */ | |
657 | fp = fopen(swaplog_path, "rb"); | |
658 | ||
659 | if (fp == NULL) { | |
660 | debugs(50, 0, "" << swaplog_path << ": " << xstrerror()); | |
661 | fatal("Failed to open swap log for reading"); | |
662 | } | |
663 | ||
664 | memset(&clean_sb, '\0', sizeof(struct stat)); | |
665 | ||
666 | if (::stat(clean_path, &clean_sb) < 0) | |
667 | *clean_flag = 0; | |
668 | else if (clean_sb.st_mtime < log_sb.st_mtime) | |
669 | *clean_flag = 0; | |
670 | else | |
671 | *clean_flag = 1; | |
672 | ||
673 | safeunlink(clean_path, 1); | |
674 | ||
675 | safe_free(swaplog_path); | |
676 | ||
677 | safe_free(clean_path); | |
678 | ||
679 | safe_free(new_path); | |
680 | ||
681 | return fp; | |
682 | } | |
683 | ||
684 | class CossCleanLog : public SwapDir::CleanLog | |
685 | { | |
686 | ||
687 | public: | |
688 | CossCleanLog(CossSwapDir *); | |
689 | virtual const StoreEntry *nextEntry(); | |
690 | virtual void write(StoreEntry const &); | |
691 | char *cur; | |
692 | char *newLog; | |
693 | char *cln; | |
694 | char *outbuf; | |
695 | off_t outbuf_offset; | |
696 | int fd; | |
697 | dlink_node *current; | |
698 | CossSwapDir *sd; | |
699 | }; | |
700 | ||
701 | #define CLEAN_BUF_SZ 16384 | |
702 | ||
703 | CossCleanLog::CossCleanLog(CossSwapDir *aSwapDir) : cur(NULL),newLog(NULL),cln(NULL),outbuf(NULL), | |
704 | outbuf_offset(0), fd(-1),current(NULL), sd(aSwapDir) | |
705 | {} | |
706 | ||
707 | /* | |
708 | * Begin the process to write clean cache state. For COSS this means | |
709 | * opening some log files and allocating write buffers. Return 0 if | |
710 | * we succeed, and assign the 'func' and 'data' return pointers. | |
711 | */ | |
712 | int | |
713 | CossSwapDir::writeCleanStart() | |
714 | { | |
715 | CossCleanLog *state = new CossCleanLog(this); | |
716 | #if HAVE_FCHMOD | |
717 | ||
718 | struct stat sb; | |
719 | #endif | |
720 | ||
721 | state->newLog = xstrdup(storeCossDirSwapLogFile(this, ".clean")); | |
722 | state->fd = file_open(state->newLog, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY); | |
723 | cleanLog = NULL; | |
724 | ||
725 | if (state->fd < 0) { | |
726 | xfree(state->newLog); | |
727 | delete state; | |
728 | return -1; | |
729 | } | |
730 | ||
731 | state->cur = xstrdup(storeCossDirSwapLogFile(this, NULL)); | |
732 | state->cln = xstrdup(storeCossDirSwapLogFile(this, ".last-clean")); | |
733 | state->outbuf = (char *)xcalloc(CLEAN_BUF_SZ, 1); | |
734 | state->outbuf_offset = 0; | |
735 | ::unlink(state->cln); | |
736 | state->current = cossindex.tail; | |
737 | debugs(50, 3, "storeCOssDirWriteCleanLogs: opened " << state->newLog << ", FD " << state->fd); | |
738 | #if HAVE_FCHMOD | |
739 | ||
740 | if (::stat(state->cur, &sb) == 0) | |
741 | fchmod(state->fd, sb.st_mode); | |
742 | ||
743 | #endif | |
744 | ||
745 | cleanLog = state; | |
746 | ||
747 | return 0; | |
748 | } | |
749 | ||
750 | /* RBC 20050101 - I think there is a race condition here, | |
751 | * *current can be freed as its not ref counted, if/when | |
752 | * the store overruns the log writer | |
753 | */ | |
754 | const StoreEntry * | |
755 | CossCleanLog::nextEntry() | |
756 | { | |
757 | const StoreEntry *entry; | |
758 | ||
759 | if (!current) | |
760 | return NULL; | |
761 | ||
762 | entry = (const StoreEntry *) current->data; | |
763 | ||
764 | current = current->prev; | |
765 | ||
766 | return entry; | |
767 | } | |
768 | ||
769 | /* | |
770 | * "write" an entry to the clean log file. | |
771 | */ | |
772 | void | |
773 | CossCleanLog::write(StoreEntry const &e) | |
774 | { | |
775 | CossCleanLog *state = this; | |
776 | StoreSwapLogData s; | |
777 | static size_t ss = sizeof(StoreSwapLogData); | |
778 | s.op = (char) SWAP_LOG_ADD; | |
779 | s.swap_filen = e.swap_filen; | |
780 | s.timestamp = e.timestamp; | |
781 | s.lastref = e.lastref; | |
782 | s.expires = e.expires; | |
783 | s.lastmod = e.lastmod; | |
784 | s.swap_file_sz = e.swap_file_sz; | |
785 | s.refcount = e.refcount; | |
786 | s.flags = e.flags; | |
787 | xmemcpy(&s.key, e.key, SQUID_MD5_DIGEST_LENGTH); | |
788 | xmemcpy(outbuf + outbuf_offset, &s, ss); | |
789 | outbuf_offset += ss; | |
790 | /* buffered write */ | |
791 | ||
792 | if (outbuf_offset + ss > CLEAN_BUF_SZ) { | |
793 | if (FD_WRITE_METHOD(fd, outbuf, outbuf_offset) < 0) { | |
794 | debugs(50, 0, "storeCossDirWriteCleanLogs: " << newLog << ": write: " << xstrerror()); | |
795 | debugs(50, 0, "storeCossDirWriteCleanLogs: Current swap logfile not replaced."); | |
796 | file_close(fd); | |
797 | fd = -1; | |
798 | unlink(newLog); | |
799 | sd->cleanLog = NULL; | |
800 | delete state; | |
801 | return; | |
802 | } | |
803 | ||
804 | outbuf_offset = 0; | |
805 | } | |
806 | } | |
807 | ||
808 | void | |
809 | CossSwapDir::writeCleanDone() | |
810 | { | |
811 | CossCleanLog *state = (CossCleanLog *)cleanLog; | |
812 | ||
813 | if (NULL == state) | |
814 | return; | |
815 | ||
816 | if (state->fd < 0) | |
817 | return; | |
818 | ||
819 | if (FD_WRITE_METHOD(state->fd, state->outbuf, state->outbuf_offset) < 0) { | |
820 | debugs(50, 0, "storeCossDirWriteCleanLogs: " << state->newLog << ": write: " << xstrerror()); | |
821 | debugs(50, 0, "storeCossDirWriteCleanLogs: Current swap logfile not replaced."); | |
822 | file_close(state->fd); | |
823 | state->fd = -1; | |
824 | ::unlink(state->newLog); | |
825 | } | |
826 | ||
827 | safe_free(state->outbuf); | |
828 | /* | |
829 | * You can't rename open files on Microsoft "operating systems" | |
830 | * so we have to close before renaming. | |
831 | */ | |
832 | closeLog(); | |
833 | /* save the fd value for a later test */ | |
834 | int anfd = state->fd; | |
835 | /* rename */ | |
836 | ||
837 | if (state->fd >= 0) { | |
838 | #if defined(_SQUID_OS2_) || defined(_SQUID_WIN32_) | |
839 | file_close(state->fd); | |
840 | state->fd = -1; | |
841 | ||
842 | #endif | |
843 | ||
844 | xrename(state->newLog, state->cur); | |
845 | } | |
846 | ||
847 | /* touch a timestamp file if we're not still validating */ | |
848 | if (StoreController::store_dirs_rebuilding) | |
849 | (void) 0; | |
850 | else if (anfd < 0) | |
851 | (void) 0; | |
852 | else | |
853 | file_close(file_open(state->cln, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY)); | |
854 | ||
855 | /* close */ | |
856 | safe_free(state->cur); | |
857 | ||
858 | safe_free(state->newLog); | |
859 | ||
860 | safe_free(state->cln); | |
861 | ||
862 | if (state->fd >= 0) | |
863 | file_close(state->fd); | |
864 | ||
865 | state->fd = -1; | |
866 | ||
867 | delete state; | |
868 | ||
869 | cleanLog = NULL; | |
870 | } | |
871 | ||
872 | static void | |
873 | FreeObject(void *address) | |
874 | { | |
875 | StoreSwapLogData *anObject = static_cast <StoreSwapLogData *>(address); | |
876 | delete anObject; | |
877 | } | |
878 | ||
879 | void | |
880 | CossSwapDir::logEntry(const StoreEntry & e, int op) const | |
881 | { | |
882 | StoreSwapLogData *s = new StoreSwapLogData; | |
883 | s->op = (char) op; | |
884 | s->swap_filen = e.swap_filen; | |
885 | s->timestamp = e.timestamp; | |
886 | s->lastref = e.lastref; | |
887 | s->expires = e.expires; | |
888 | s->lastmod = e.lastmod; | |
889 | s->swap_file_sz = e.swap_file_sz; | |
890 | s->refcount = e.refcount; | |
891 | s->flags = e.flags; | |
892 | xmemcpy(s->key, e.key, SQUID_MD5_DIGEST_LENGTH); | |
893 | file_write(swaplog_fd, | |
894 | -1, | |
895 | s, | |
896 | sizeof(StoreSwapLogData), | |
897 | NULL, | |
898 | NULL, | |
899 | &FreeObject); | |
900 | } | |
901 | ||
902 | void | |
903 | CossSwapDir::create() | |
904 | { | |
905 | debugs (47, 3, "Creating swap space in " << path); | |
906 | ||
907 | struct stat swap_sb; | |
908 | int swap; | |
909 | ||
910 | if (::stat(path, &swap_sb) < 0) { | |
911 | debugs (47, 2, "COSS swap space space being allocated."); | |
912 | #ifdef _SQUID_MSWIN_ | |
913 | ||
914 | mkdir(path); | |
915 | #else | |
916 | ||
917 | mkdir(path, 0700); | |
918 | #endif | |
919 | ||
920 | } | |
921 | ||
922 | /* should check here for directories instead of files, and for file size | |
923 | * TODO - if nothing changes, there is nothing to do | |
924 | */ | |
925 | swap = open(stripePath(), O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0600); | |
926 | ||
927 | /* TODO just set the file size */ | |
928 | /* swap size is in K */ | |
929 | char *block[1024]; | |
930 | ||
931 | memset(&block, '\0', 1024); | |
932 | ||
933 | for (off_t offset = 0; offset < max_size; ++offset) { | |
934 | if (write (swap, block, 1024) < 1024) { | |
935 | debugs (47, 0, "Failed to create COSS swap space in " << path); | |
936 | } | |
937 | } | |
938 | ||
939 | close (swap); | |
940 | ||
941 | } | |
942 | ||
943 | /* we are shutting down, flush all membufs to disk */ | |
944 | CossSwapDir::~CossSwapDir() | |
945 | { | |
946 | io->sync(); | |
947 | ||
948 | if (theFile != NULL) | |
949 | theFile->close(); | |
950 | ||
951 | delete io; | |
952 | ||
953 | closeLog(); | |
954 | ||
955 | n_coss_dirs--; | |
956 | ||
957 | safe_free(ioModule); | |
958 | ||
959 | safe_free(stripe_path); | |
960 | } | |
961 | ||
962 | /* | |
963 | * storeCossDirCheckObj | |
964 | * | |
965 | * This routine is called by storeDirSelectSwapDir to see if the given | |
966 | * object is able to be stored on this filesystem. COSS filesystems will | |
967 | * not store everything. We don't check for maxobjsize here since its | |
968 | * done by the upper layers. | |
969 | */ | |
970 | int | |
971 | CossSwapDir::canStore(StoreEntry const &e)const | |
972 | { | |
973 | ||
974 | /* Check if the object is a special object, we can't cache these */ | |
975 | ||
976 | if (EBIT_TEST(e.flags, ENTRY_SPECIAL)) | |
977 | return -1; | |
978 | ||
979 | /* Otherwise, we're ok */ | |
980 | /* Return load, cs->aq.aq_numpending out of MAX_ASYNCOP */ | |
981 | return io->load(); | |
982 | } | |
983 | ||
984 | /* | |
985 | * storeCossDirCallback - do the IO completions | |
986 | */ | |
987 | int | |
988 | CossSwapDir::callback() | |
989 | { | |
990 | return io->callback(); | |
991 | } | |
992 | ||
993 | /* ========== LOCAL FUNCTIONS ABOVE, GLOBAL FUNCTIONS BELOW ========== */ | |
994 | ||
995 | void | |
996 | CossSwapDir::statfs(StoreEntry & sentry) const | |
997 | { | |
998 | storeAppendPrintf(&sentry, "\n"); | |
999 | storeAppendPrintf(&sentry, "Maximum Size: %d KB\n", max_size); | |
1000 | storeAppendPrintf(&sentry, "Current Size: %d KB\n", cur_size); | |
1001 | storeAppendPrintf(&sentry, "Percent Used: %0.2f%%\n", | |
1002 | 100.0 * cur_size / max_size); | |
1003 | storeAppendPrintf(&sentry, "Number of object collisions: %d\n", (int) numcollisions); | |
1004 | #if 0 | |
1005 | /* is this applicable? I Hope not .. */ | |
1006 | storeAppendPrintf(sentry, "Filemap bits in use: %d of %d (%d%%)\n", | |
1007 | SD->map->n_files_in_map, SD->map->max_n_files, | |
1008 | percent(SD->map->n_files_in_map, SD->map->max_n_files)); | |
1009 | #endif | |
1010 | ||
1011 | // storeAppendPrintf(&sentry, "Pending operations: %d out of %d\n", io->aq.aq_numpending, MAX_ASYNCOP); | |
1012 | storeAppendPrintf(&sentry, "Flags:"); | |
1013 | ||
1014 | if (flags.selected) | |
1015 | storeAppendPrintf(&sentry, " SELECTED"); | |
1016 | ||
1017 | if (flags.read_only) | |
1018 | storeAppendPrintf(&sentry, " READ-ONLY"); | |
1019 | ||
1020 | storeAppendPrintf(&sentry, "\n"); | |
1021 | } | |
1022 | ||
1023 | void | |
1024 | CossSwapDir::parse(int anIndex, char *aPath) | |
1025 | { | |
1026 | unsigned int i; | |
1027 | unsigned int size; | |
1028 | off_t max_offset; | |
1029 | ||
1030 | i = GetInteger(); | |
1031 | size = i << 10; /* Mbytes to Kbytes */ | |
1032 | ||
1033 | if (size <= 0) | |
1034 | fatal("storeCossDirParse: invalid size value"); | |
1035 | ||
1036 | index = anIndex; | |
1037 | ||
1038 | path = xstrdup(aPath); | |
1039 | ||
1040 | max_size = size; | |
1041 | ||
1042 | parseOptions(0); | |
1043 | ||
1044 | if (NULL == io) | |
1045 | changeIO(DiskIOModule::FindDefault()); | |
1046 | ||
1047 | /* Enforce maxobjsize being set to something */ | |
1048 | if (max_objsize == -1) | |
1049 | fatal("COSS requires max-size to be set to something other than -1!\n"); | |
1050 | ||
1051 | if (max_objsize > COSS_MEMBUF_SZ) | |
1052 | fatalf("COSS max-size option must be less than COSS_MEMBUF_SZ (%d)\n", | |
1053 | COSS_MEMBUF_SZ); | |
1054 | ||
1055 | /* | |
1056 | * check that we won't overflow sfileno later. 0xFFFFFF is the | |
1057 | * largest possible sfileno, assuming sfileno is a 25-bit | |
1058 | * signed integer, as defined in structs.h. | |
1059 | */ | |
1060 | max_offset = (off_t) 0xFFFFFF << blksz_bits; | |
1061 | ||
1062 | if ((off_t)max_size > (max_offset>>10)) { | |
1063 | debugs(47, 0, "COSS block-size = " << (1<<blksz_bits) << " bytes"); | |
1064 | debugs(47,0, "COSS largest file offset = " << (max_offset >> 10) << " KB"); | |
1065 | debugs(47, 0, "COSS cache_dir size = " << max_size << " KB"); | |
1066 | fatal("COSS cache_dir size exceeds largest offset\n"); | |
1067 | } | |
1068 | } | |
1069 | ||
1070 | ||
1071 | void | |
1072 | CossSwapDir::reconfigure(int index, char *path) | |
1073 | { | |
1074 | unsigned int i; | |
1075 | unsigned int size; | |
1076 | ||
1077 | i = GetInteger(); | |
1078 | size = i << 10; /* Mbytes to Kbytes */ | |
1079 | ||
1080 | if (size <= 0) | |
1081 | fatal("storeCossDirParse: invalid size value"); | |
1082 | ||
1083 | if (size == (size_t)max_size) | |
1084 | debugs(3, 1, "Cache COSS dir '" << path << "' size remains unchanged at " << size << " KB"); | |
1085 | else { | |
1086 | debugs(3, 1, "Cache COSS dir '" << path << "' size changed to " << size << " KB"); | |
1087 | max_size = size; | |
1088 | } | |
1089 | ||
1090 | /* Enforce maxobjsize being set to something */ | |
1091 | if (max_objsize == -1) | |
1092 | fatal("COSS requires max-size to be set to something other than -1!\n"); | |
1093 | } | |
1094 | ||
1095 | void | |
1096 | CossSwapDir::dump(StoreEntry &entry)const | |
1097 | { | |
1098 | storeAppendPrintf(&entry, " %d", max_size >> 10); | |
1099 | dumpOptions(&entry); | |
1100 | } | |
1101 | ||
1102 | CossSwapDir::CossSwapDir() : SwapDir ("coss"), swaplog_fd(-1), count(0), current_membuf (NULL), current_offset(0), numcollisions(0), blksz_bits(0), io (NULL), ioModule(NULL), currentIOOptions(new ConfigOptionVector()), stripe_path(NULL) | |
1103 | { | |
1104 | membufs.head = NULL; | |
1105 | membufs.tail = NULL; | |
1106 | cossindex.head = NULL; | |
1107 | cossindex.tail = NULL; | |
1108 | blksz_mask = (1 << blksz_bits) - 1; | |
1109 | repl = NULL; | |
1110 | } | |
1111 | ||
1112 | bool | |
1113 | CossSwapDir::optionBlockSizeParse(const char *option, const char *value, int reconfiguring) | |
1114 | { | |
1115 | assert(option); | |
1116 | ||
1117 | if (strcmp(option, "block-size") != 0) | |
1118 | return false; | |
1119 | ||
1120 | if (!value) | |
1121 | self_destruct(); | |
1122 | ||
1123 | int blksz = atoi(value); | |
1124 | ||
1125 | if (blksz == (1 << blksz_bits)) | |
1126 | /* no change */ | |
1127 | return true; | |
1128 | ||
1129 | if (reconfiguring) { | |
1130 | debugs(47, 0, "WARNING: cannot change COSS block-size while Squid is running"); | |
1131 | return false; | |
1132 | } | |
1133 | ||
1134 | int nbits = 0; | |
1135 | int check = blksz; | |
1136 | ||
1137 | while (check > 1) { | |
1138 | nbits++; | |
1139 | check >>= 1; | |
1140 | } | |
1141 | ||
1142 | check = 1 << nbits; | |
1143 | ||
1144 | if (check != blksz) | |
1145 | fatal("COSS block-size must be a power of 2\n"); | |
1146 | ||
1147 | if (nbits > 13) | |
1148 | fatal("COSS block-size must be 8192 or smaller\n"); | |
1149 | ||
1150 | blksz_bits = nbits; | |
1151 | ||
1152 | blksz_mask = (1 << blksz_bits) - 1; | |
1153 | ||
1154 | return true; | |
1155 | } | |
1156 | ||
1157 | void | |
1158 | CossSwapDir::optionBlockSizeDump(StoreEntry * e) const | |
1159 | { | |
1160 | storeAppendPrintf(e, " block-size=%d", 1 << blksz_bits); | |
1161 | } | |
1162 | ||
1163 | StoreSearch * | |
1164 | CossSwapDir::search(String const url, HttpRequest *) | |
1165 | { | |
1166 | if (url.size()) | |
1167 | fatal ("Cannot search by url yet\n"); | |
1168 | ||
1169 | return new StoreSearchCoss (this); | |
1170 | } | |
1171 | ||
1172 | char const * | |
1173 | CossSwapDir::stripePath() const | |
1174 | { | |
1175 | if (!stripe_path) { | |
1176 | String result = path; | |
1177 | result.append("/stripe"); | |
1178 | const_cast<CossSwapDir *>(this)->stripe_path = xstrdup(result.buf()); | |
1179 | } | |
1180 | ||
1181 | return stripe_path; | |
1182 | } | |
1183 | ||
1184 | CBDATA_CLASS_INIT(StoreSearchCoss); | |
1185 | StoreSearchCoss::StoreSearchCoss(RefCount<CossSwapDir> aSwapDir) : sd(aSwapDir), callback (NULL), cbdata(NULL), _done (false), current(NULL), next_(sd->cossindex.tail) | |
1186 | { | |
1187 | /* TODO: this races with the store as does the cleanlog stuff. | |
1188 | * FIXME by making coss_nodes ref counted */ | |
1189 | } | |
1190 | ||
1191 | /* do not link | |
1192 | StoreSearchCoss::StoreSearchCoss(StoreSearchCoss const &); | |
1193 | */ | |
1194 | ||
1195 | StoreSearchCoss::~StoreSearchCoss() | |
1196 | {} | |
1197 | ||
1198 | void | |
1199 | StoreSearchCoss::next(void (callback)(void *cbdata), void *cbdata) | |
1200 | { | |
1201 | next(); | |
1202 | callback (cbdata); | |
1203 | } | |
1204 | ||
1205 | bool | |
1206 | StoreSearchCoss::next() | |
1207 | { | |
1208 | current = next_; | |
1209 | ||
1210 | if (next_) | |
1211 | next_ = next_->prev; | |
1212 | ||
1213 | if (!current) | |
1214 | _done = true; | |
1215 | ||
1216 | return current != NULL; | |
1217 | } | |
1218 | ||
1219 | bool | |
1220 | StoreSearchCoss::error() const | |
1221 | { | |
1222 | return false; | |
1223 | } | |
1224 | ||
1225 | bool | |
1226 | StoreSearchCoss::isDone() const | |
1227 | { | |
1228 | return _done; | |
1229 | } | |
1230 | ||
1231 | StoreEntry * | |
1232 | StoreSearchCoss::currentItem() | |
1233 | { | |
1234 | if (!current) | |
1235 | return NULL; | |
1236 | ||
1237 | return static_cast<StoreEntry *>( current->data ); | |
1238 | } |