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Commit | Line | Data |
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f1dc9b30 | 1 | /* |
bbc27441 | 2 | * Copyright (C) 1996-2014 The Squid Software Foundation and contributors |
e25c139f | 3 | * |
bbc27441 AJ |
4 | * Squid software is distributed under GPLv2+ license and includes |
5 | * contributions from numerous individuals and organizations. | |
6 | * Please see the COPYING and CONTRIBUTORS files for details. | |
f1dc9b30 | 7 | */ |
8 | ||
bbc27441 AJ |
9 | /* DEBUG: section 47 Store Directory Routines */ |
10 | ||
582c2af2 FC |
11 | #include "squid.h" |
12 | #include "globals.h" | |
13 | #include "mem_node.h" | |
528b2c61 | 14 | #include "MemObject.h" |
9487bae9 | 15 | #include "MemStore.h" |
582c2af2 | 16 | #include "profiler/Profiler.h" |
4d5904f7 | 17 | #include "SquidConfig.h" |
a98bcbee | 18 | #include "SquidMath.h" |
985c86bc | 19 | #include "SquidTime.h" |
582c2af2 | 20 | #include "Store.h" |
fb548aaf | 21 | #include "store_key_md5.h" |
21d845b1 | 22 | #include "StoreHashIndex.h" |
4b981814 | 23 | #include "swap_log_op.h" |
602d9612 | 24 | #include "SwapDir.h" |
5bed43d6 | 25 | #include "tools.h" |
9a9954ba | 26 | #include "Transients.h" |
85407535 | 27 | |
074d6a40 AJ |
28 | #include <cerrno> |
29 | #include <climits> | |
582c2af2 FC |
30 | #if HAVE_SYS_WAIT_H |
31 | #include <sys/wait.h> | |
32 | #endif | |
c0db87f2 | 33 | |
65a53c8e | 34 | static STDIRSELECT storeDirSelectSwapDirRoundRobin; |
35 | static STDIRSELECT storeDirSelectSwapDirLeastLoad; | |
c8f4eac4 | 36 | |
b07b21cc | 37 | /* |
38 | * store_dirs_rebuilding is initialized to _1_ as a hack so that | |
39 | * storeDirWriteCleanLogs() doesn't try to do anything unless _all_ | |
40 | * cache_dirs have been read. For example, without this hack, Squid | |
41 | * will try to write clean log files if -kparse fails (becasue it | |
42 | * calls fatal()). | |
43 | */ | |
44 | int StoreController::store_dirs_rebuilding = 1; | |
bef81ea5 | 45 | |
c8f4eac4 | 46 | StoreController::StoreController() : swapDir (new StoreHashIndex()) |
9a9954ba | 47 | , memStore(NULL), transients(NULL) |
c8f4eac4 | 48 | {} |
49 | ||
50 | StoreController::~StoreController() | |
9487bae9 AR |
51 | { |
52 | delete memStore; | |
9a9954ba | 53 | delete transients; |
9487bae9 | 54 | } |
65a53c8e | 55 | |
56 | /* | |
57 | * This function pointer is set according to 'store_dir_select_algorithm' | |
58 | * in squid.conf. | |
59 | */ | |
60 | STDIRSELECT *storeDirSelectSwapDir = storeDirSelectSwapDirLeastLoad; | |
d141c677 | 61 | |
9838d6c8 | 62 | void |
c8f4eac4 | 63 | StoreController::init() |
596dddc1 | 64 | { |
57af1e3f | 65 | if (Config.memShared && IamWorkerProcess()) { |
60be8b2d AR |
66 | memStore = new MemStore; |
67 | memStore->init(); | |
68 | } | |
9487bae9 | 69 | |
c8f4eac4 | 70 | swapDir->init(); |
62e76326 | 71 | |
65a53c8e | 72 | if (0 == strcasecmp(Config.store_dir_select_algorithm, "round-robin")) { |
62e76326 | 73 | storeDirSelectSwapDir = storeDirSelectSwapDirRoundRobin; |
e0236918 | 74 | debugs(47, DBG_IMPORTANT, "Using Round Robin store dir selection"); |
65a53c8e | 75 | } else { |
62e76326 | 76 | storeDirSelectSwapDir = storeDirSelectSwapDirLeastLoad; |
e0236918 | 77 | debugs(47, DBG_IMPORTANT, "Using Least Load store dir selection"); |
65a53c8e | 78 | } |
9a9954ba AR |
79 | |
80 | if (UsingSmp() && IamWorkerProcess() && Config.onoff.collapsed_forwarding) { | |
81 | transients = new Transients; | |
82 | transients->init(); | |
83 | } | |
85407535 | 84 | } |
85 | ||
86 | void | |
c8f4eac4 | 87 | StoreController::createOneStore(Store &aStore) |
596dddc1 | 88 | { |
62e76326 | 89 | /* |
154c7949 | 90 | * On Windows, fork() is not available. |
91 | * The following is a workaround for create store directories sequentially | |
92 | * when running on native Windows port. | |
93 | */ | |
7aa9bb3e | 94 | #if !_SQUID_WINDOWS_ |
62e76326 | 95 | |
154c7949 | 96 | if (fork()) |
62e76326 | 97 | return; |
98 | ||
099a1791 | 99 | #endif |
62e76326 | 100 | |
c8f4eac4 | 101 | aStore.create(); |
62e76326 | 102 | |
7aa9bb3e | 103 | #if !_SQUID_WINDOWS_ |
62e76326 | 104 | |
154c7949 | 105 | exit(0); |
62e76326 | 106 | |
099a1791 | 107 | #endif |
154c7949 | 108 | } |
109 | ||
110 | void | |
c8f4eac4 | 111 | StoreController::create() |
154c7949 | 112 | { |
c8f4eac4 | 113 | swapDir->create(); |
62e76326 | 114 | |
7aa9bb3e | 115 | #if !_SQUID_WINDOWS_ |
62e76326 | 116 | |
8a1c8f2c | 117 | pid_t pid; |
62e76326 | 118 | |
b2c141d4 | 119 | do { |
62e76326 | 120 | int status; |
1191b93b | 121 | #if _SQUID_NEXT_ |
62e76326 | 122 | |
123 | pid = wait3(&status, WNOHANG, NULL); | |
b2c141d4 | 124 | #else |
62e76326 | 125 | |
126 | pid = waitpid(-1, &status, 0); | |
b2c141d4 | 127 | #endif |
62e76326 | 128 | |
b2c141d4 | 129 | } while (pid > 0 || (pid < 0 && errno == EINTR)); |
62e76326 | 130 | |
099a1791 | 131 | #endif |
596dddc1 | 132 | } |
133 | ||
a8a33c46 | 134 | /** |
cd748f27 | 135 | * Determine whether the given directory can handle this object |
136 | * size | |
137 | * | |
138 | * Note: if the object size is -1, then the only swapdirs that | |
a8a33c46 | 139 | * will return true here are ones that have min and max unset, |
cd748f27 | 140 | * ie any-sized-object swapdirs. This is a good thing. |
141 | */ | |
c8f4eac4 | 142 | bool |
3e62bd58 | 143 | SwapDir::objectSizeIsAcceptable(int64_t objsize) const |
cd748f27 | 144 | { |
a8a33c46 | 145 | // If the swapdir has no range limits, then it definitely can |
b6662ffd | 146 | if (min_objsize <= 0 && max_objsize == -1) |
c8f4eac4 | 147 | return true; |
d68f43a0 | 148 | |
149 | /* | |
a8a33c46 A |
150 | * If the object size is -1 and the storedir has limits we |
151 | * can't store it there. | |
d68f43a0 | 152 | */ |
a8a33c46 | 153 | if (objsize == -1) |
c8f4eac4 | 154 | return false; |
d68f43a0 | 155 | |
a8a33c46 | 156 | // Else, make sure that the object size will fit. |
b475997c AJ |
157 | if (max_objsize == -1 && min_objsize <= objsize) |
158 | return true; | |
159 | else | |
160 | return min_objsize <= objsize && max_objsize > objsize; | |
cd748f27 | 161 | } |
162 | ||
d141c677 | 163 | /* |
164 | * This new selection scheme simply does round-robin on all SwapDirs. | |
8e8d4f30 | 165 | * A SwapDir is skipped if it is over the max_size (100%) limit, or |
166 | * overloaded. | |
d141c677 | 167 | */ |
168 | static int | |
8e8d4f30 | 169 | storeDirSelectSwapDirRoundRobin(const StoreEntry * e) |
d141c677 | 170 | { |
aa1a691e AR |
171 | // e->objectLen() is negative at this point when we are still STORE_PENDING |
172 | ssize_t objsize = e->mem_obj->expectedReplySize(); | |
246e6cc1 AJ |
173 | if (objsize != -1) |
174 | objsize += e->mem_obj->swap_hdr_sz; | |
175 | ||
29a238a3 AR |
176 | // Increment the first candidate once per selection (not once per |
177 | // iteration) to reduce bias when some disk(s) attract more entries. | |
178 | static int firstCandidate = 0; | |
179 | if (++firstCandidate >= Config.cacheSwap.n_configured) | |
180 | firstCandidate = 0; | |
62e76326 | 181 | |
29a238a3 AR |
182 | for (int i = 0; i < Config.cacheSwap.n_configured; ++i) { |
183 | const int dirn = (firstCandidate + i) % Config.cacheSwap.n_configured; | |
184 | const SwapDir *sd = dynamic_cast<SwapDir*>(INDEXSD(dirn)); | |
62e76326 | 185 | |
29a238a3 | 186 | int load = 0; |
aa1a691e | 187 | if (!sd->canStore(*e, objsize, load)) |
62e76326 | 188 | continue; |
189 | ||
62e76326 | 190 | if (load < 0 || load > 1000) { |
191 | continue; | |
192 | } | |
193 | ||
194 | return dirn; | |
d141c677 | 195 | } |
62e76326 | 196 | |
8e8d4f30 | 197 | return -1; |
d141c677 | 198 | } |
960a01e3 | 199 | |
a2899918 | 200 | /* |
cd748f27 | 201 | * Spread load across all of the store directories |
202 | * | |
203 | * Note: We should modify this later on to prefer sticking objects | |
204 | * in the *tightest fit* swapdir to conserve space, along with the | |
26ac0430 | 205 | * actual swapdir usage. But for now, this hack will do while |
cd748f27 | 206 | * testing, so you should order your swapdirs in the config file |
638402dd | 207 | * from smallest max-size= to largest max-size=. |
cd748f27 | 208 | * |
209 | * We also have to choose nleast == nconf since we need to consider | |
210 | * ALL swapdirs, regardless of state. Again, this is a hack while | |
211 | * we sort out the real usefulness of this algorithm. | |
a2899918 | 212 | */ |
65a53c8e | 213 | static int |
214 | storeDirSelectSwapDirLeastLoad(const StoreEntry * e) | |
a2899918 | 215 | { |
cc34568d | 216 | int64_t most_free = 0; |
8e8d4f30 | 217 | ssize_t least_objsize = -1; |
218 | int least_load = INT_MAX; | |
cd748f27 | 219 | int load; |
220 | int dirn = -1; | |
221 | int i; | |
c8f4eac4 | 222 | RefCount<SwapDir> SD; |
cd748f27 | 223 | |
aa1a691e AR |
224 | // e->objectLen() is negative at this point when we are still STORE_PENDING |
225 | ssize_t objsize = e->mem_obj->expectedReplySize(); | |
62e76326 | 226 | |
cd748f27 | 227 | if (objsize != -1) |
62e76326 | 228 | objsize += e->mem_obj->swap_hdr_sz; |
229 | ||
5db6bf73 | 230 | for (i = 0; i < Config.cacheSwap.n_configured; ++i) { |
c8f4eac4 | 231 | SD = dynamic_cast<SwapDir *>(INDEXSD(i)); |
1a6347cd | 232 | SD->flags.selected = false; |
62e76326 | 233 | |
aa1a691e | 234 | if (!SD->canStore(*e, objsize, load)) |
62e76326 | 235 | continue; |
236 | ||
aa1a691e | 237 | if (load < 0 || load > 1000) |
62e76326 | 238 | continue; |
239 | ||
240 | if (load > least_load) | |
241 | continue; | |
242 | ||
cc34568d | 243 | const int64_t cur_free = SD->maxSize() - SD->currentSize(); |
62e76326 | 244 | |
245 | /* If the load is equal, then look in more details */ | |
246 | if (load == least_load) { | |
b51ec8c8 | 247 | /* closest max-size fit */ |
62e76326 | 248 | |
249 | if (least_objsize != -1) | |
b51ec8c8 | 250 | if (SD->maxObjectSize() > least_objsize) |
62e76326 | 251 | continue; |
252 | ||
253 | /* most free */ | |
254 | if (cur_free < most_free) | |
255 | continue; | |
256 | } | |
257 | ||
258 | least_load = load; | |
b51ec8c8 | 259 | least_objsize = SD->maxObjectSize(); |
62e76326 | 260 | most_free = cur_free; |
261 | dirn = i; | |
a2899918 | 262 | } |
62e76326 | 263 | |
ade906c8 | 264 | if (dirn >= 0) |
1a6347cd | 265 | dynamic_cast<SwapDir *>(INDEXSD(dirn))->flags.selected = true; |
62e76326 | 266 | |
cd748f27 | 267 | return dirn; |
596dddc1 | 268 | } |
269 | ||
b109de6b | 270 | /* |
271 | * An entry written to the swap log MUST have the following | |
272 | * properties. | |
273 | * 1. It MUST be a public key. It does no good to log | |
274 | * a public ADD, change the key, then log a private | |
275 | * DEL. So we need to log a DEL before we change a | |
276 | * key from public to private. | |
cd748f27 | 277 | * 2. It MUST have a valid (> -1) swap_filen. |
b109de6b | 278 | */ |
4683e377 | 279 | void |
5830cdb3 | 280 | storeDirSwapLog(const StoreEntry * e, int op) |
4683e377 | 281 | { |
d3b3ab85 | 282 | assert (e); |
d46a87a8 | 283 | assert(!EBIT_TEST(e->flags, KEY_PRIVATE)); |
cd748f27 | 284 | assert(e->swap_filen >= 0); |
6c57e268 | 285 | /* |
286 | * icons and such; don't write them to the swap log | |
287 | */ | |
62e76326 | 288 | |
d46a87a8 | 289 | if (EBIT_TEST(e->flags, ENTRY_SPECIAL)) |
62e76326 | 290 | return; |
291 | ||
b109de6b | 292 | assert(op > SWAP_LOG_NOP && op < SWAP_LOG_MAX); |
62e76326 | 293 | |
26ac0430 AJ |
294 | debugs(20, 3, "storeDirSwapLog: " << |
295 | swap_log_op_str[op] << " " << | |
296 | e->getMD5Text() << " " << | |
297 | e->swap_dirn << " " << | |
bf8fe701 | 298 | std::hex << std::uppercase << std::setfill('0') << std::setw(8) << e->swap_filen); |
62e76326 | 299 | |
c8f4eac4 | 300 | dynamic_cast<SwapDir *>(INDEXSD(e->swap_dirn))->logEntry(*e, op); |
301 | } | |
302 | ||
93bc1434 AR |
303 | void |
304 | StoreController::getStats(StoreInfoStats &stats) const | |
305 | { | |
306 | if (memStore) | |
307 | memStore->getStats(stats); | |
308 | else { | |
309 | // move this code to a non-shared memory cache class when we have it | |
310 | stats.mem.shared = false; | |
311 | stats.mem.capacity = Config.memMaxSize; | |
312 | stats.mem.size = mem_node::StoreMemSize(); | |
313 | stats.mem.count = hot_obj_count; | |
314 | } | |
315 | ||
316 | swapDir->getStats(stats); | |
317 | ||
318 | // low-level info not specific to memory or disk cache | |
319 | stats.store_entry_count = StoreEntry::inUseCount(); | |
320 | stats.mem_object_count = MemObject::inUseCount(); | |
321 | } | |
322 | ||
c932b107 | 323 | void |
c8f4eac4 | 324 | StoreController::stat(StoreEntry &output) const |
c932b107 | 325 | { |
c8f4eac4 | 326 | storeAppendPrintf(&output, "Store Directory Statistics:\n"); |
327 | storeAppendPrintf(&output, "Store Entries : %lu\n", | |
62e76326 | 328 | (unsigned long int)StoreEntry::inUseCount()); |
c91ca3ce | 329 | storeAppendPrintf(&output, "Maximum Swap Size : %" PRIu64 " KB\n", |
cc34568d | 330 | maxSize() >> 10); |
57f583f1 | 331 | storeAppendPrintf(&output, "Current Store Swap Size: %.2f KB\n", |
cc34568d | 332 | currentSize() / 1024.0); |
57f583f1 | 333 | storeAppendPrintf(&output, "Current Capacity : %.2f%% used, %.2f%% free\n", |
cc34568d DK |
334 | Math::doublePercent(currentSize(), maxSize()), |
335 | Math::doublePercent((maxSize() - currentSize()), maxSize())); | |
ada9124c AR |
336 | |
337 | if (memStore) | |
338 | memStore->stat(output); | |
e3ef2b09 | 339 | |
c8f4eac4 | 340 | /* now the swapDir */ |
341 | swapDir->stat(output); | |
5d406e78 | 342 | } |
343 | ||
c8f4eac4 | 344 | /* if needed, this could be taught to cache the result */ |
12e11a5c | 345 | uint64_t |
c8f4eac4 | 346 | StoreController::maxSize() const |
f4e3fa54 | 347 | { |
c8f4eac4 | 348 | /* TODO: include memory cache ? */ |
349 | return swapDir->maxSize(); | |
350 | } | |
62e76326 | 351 | |
12e11a5c | 352 | uint64_t |
c8f4eac4 | 353 | StoreController::minSize() const |
354 | { | |
355 | /* TODO: include memory cache ? */ | |
356 | return swapDir->minSize(); | |
f4e3fa54 | 357 | } |
358 | ||
39c1e1d9 DK |
359 | uint64_t |
360 | StoreController::currentSize() const | |
361 | { | |
362 | return swapDir->currentSize(); | |
363 | } | |
364 | ||
365 | uint64_t | |
366 | StoreController::currentCount() const | |
367 | { | |
368 | return swapDir->currentCount(); | |
369 | } | |
370 | ||
af2fda07 DK |
371 | int64_t |
372 | StoreController::maxObjectSize() const | |
373 | { | |
374 | return swapDir->maxObjectSize(); | |
375 | } | |
376 | ||
f4e3fa54 | 377 | void |
c8f4eac4 | 378 | SwapDir::diskFull() |
f4e3fa54 | 379 | { |
cc34568d | 380 | if (currentSize() >= maxSize()) |
62e76326 | 381 | return; |
382 | ||
cc34568d | 383 | max_size = currentSize(); |
62e76326 | 384 | |
e0236918 | 385 | debugs(20, DBG_IMPORTANT, "WARNING: Shrinking cache_dir #" << index << " to " << currentSize() / 1024.0 << " KB"); |
f4e3fa54 | 386 | } |
95dcd2b8 | 387 | |
388 | void | |
389 | storeDirOpenSwapLogs(void) | |
390 | { | |
d3b3ab85 | 391 | for (int dirn = 0; dirn < Config.cacheSwap.n_configured; ++dirn) |
c8f4eac4 | 392 | dynamic_cast<SwapDir *>(INDEXSD(dirn))->openLog(); |
95dcd2b8 | 393 | } |
394 | ||
395 | void | |
396 | storeDirCloseSwapLogs(void) | |
397 | { | |
d3b3ab85 | 398 | for (int dirn = 0; dirn < Config.cacheSwap.n_configured; ++dirn) |
c8f4eac4 | 399 | dynamic_cast<SwapDir *>(INDEXSD(dirn))->closeLog(); |
95dcd2b8 | 400 | } |
401 | ||
b2c141d4 | 402 | /* |
403 | * storeDirWriteCleanLogs | |
26ac0430 | 404 | * |
b2c141d4 | 405 | * Writes a "clean" swap log file from in-memory metadata. |
cd748f27 | 406 | * This is a rewrite of the original function to troll each |
407 | * StoreDir and write the logs, and flush at the end of | |
408 | * the run. Thanks goes to Eric Stern, since this solution | |
409 | * came out of his COSS code. | |
b2c141d4 | 410 | */ |
b2c141d4 | 411 | int |
412 | storeDirWriteCleanLogs(int reopen) | |
95dcd2b8 | 413 | { |
6a566b9c | 414 | const StoreEntry *e = NULL; |
b2c141d4 | 415 | int n = 0; |
62e76326 | 416 | |
e812ecfc | 417 | struct timeval start; |
418 | double dt; | |
c8f4eac4 | 419 | RefCount<SwapDir> sd; |
b2c141d4 | 420 | int dirn; |
6a566b9c | 421 | int notdone = 1; |
62e76326 | 422 | |
bef81ea5 | 423 | if (StoreController::store_dirs_rebuilding) { |
e0236918 FC |
424 | debugs(20, DBG_IMPORTANT, "Not currently OK to rewrite swap log."); |
425 | debugs(20, DBG_IMPORTANT, "storeDirWriteCleanLogs: Operation aborted."); | |
62e76326 | 426 | return 0; |
b2c141d4 | 427 | } |
62e76326 | 428 | |
e0236918 | 429 | debugs(20, DBG_IMPORTANT, "storeDirWriteCleanLogs: Starting..."); |
e812ecfc | 430 | getCurrentTime(); |
431 | start = current_time; | |
62e76326 | 432 | |
5db6bf73 | 433 | for (dirn = 0; dirn < Config.cacheSwap.n_configured; ++dirn) { |
c8f4eac4 | 434 | sd = dynamic_cast<SwapDir *>(INDEXSD(dirn)); |
62e76326 | 435 | |
436 | if (sd->writeCleanStart() < 0) { | |
e0236918 | 437 | debugs(20, DBG_IMPORTANT, "log.clean.start() failed for dir #" << sd->index); |
62e76326 | 438 | continue; |
439 | } | |
6a566b9c | 440 | } |
62e76326 | 441 | |
e78ef51b | 442 | /* |
443 | * This may look inefficient as CPU wise it is more efficient to do this | |
444 | * sequentially, but I/O wise the parallellism helps as it allows more | |
445 | * hdd spindles to be active. | |
d3b3ab85 | 446 | */ |
c1dd71ae | 447 | while (notdone) { |
62e76326 | 448 | notdone = 0; |
449 | ||
5db6bf73 | 450 | for (dirn = 0; dirn < Config.cacheSwap.n_configured; ++dirn) { |
c8f4eac4 | 451 | sd = dynamic_cast<SwapDir *>(INDEXSD(dirn)); |
62e76326 | 452 | |
453 | if (NULL == sd->cleanLog) | |
454 | continue; | |
455 | ||
456 | e = sd->cleanLog->nextEntry(); | |
457 | ||
458 | if (!e) | |
459 | continue; | |
460 | ||
461 | notdone = 1; | |
462 | ||
463 | if (!sd->canLog(*e)) | |
464 | continue; | |
465 | ||
466 | sd->cleanLog->write(*e); | |
467 | ||
468 | if ((++n & 0xFFFF) == 0) { | |
469 | getCurrentTime(); | |
e0236918 | 470 | debugs(20, DBG_IMPORTANT, " " << std::setw(7) << n << |
bf8fe701 | 471 | " entries written so far."); |
62e76326 | 472 | } |
473 | } | |
6a566b9c | 474 | } |
62e76326 | 475 | |
6a566b9c | 476 | /* Flush */ |
5db6bf73 | 477 | for (dirn = 0; dirn < Config.cacheSwap.n_configured; ++dirn) |
c8f4eac4 | 478 | dynamic_cast<SwapDir *>(INDEXSD(dirn))->writeCleanDone(); |
62e76326 | 479 | |
b2c141d4 | 480 | if (reopen) |
62e76326 | 481 | storeDirOpenSwapLogs(); |
482 | ||
e812ecfc | 483 | getCurrentTime(); |
62e76326 | 484 | |
e812ecfc | 485 | dt = tvSubDsec(start, current_time); |
62e76326 | 486 | |
e0236918 FC |
487 | debugs(20, DBG_IMPORTANT, " Finished. Wrote " << n << " entries."); |
488 | debugs(20, DBG_IMPORTANT, " Took "<< std::setw(3)<< std::setprecision(2) << dt << | |
bf8fe701 | 489 | " seconds ("<< std::setw(6) << ((double) n / (dt > 0.0 ? dt : 1.0)) << " entries/sec)."); |
62e76326 | 490 | |
b2c141d4 | 491 | return n; |
95dcd2b8 | 492 | } |
d141c677 | 493 | |
c8f4eac4 | 494 | StoreSearch * |
30abd221 | 495 | StoreController::search(String const url, HttpRequest *request) |
c8f4eac4 | 496 | { |
497 | /* cheat, for now you can't search the memory hot cache */ | |
498 | return swapDir->search(url, request); | |
499 | } | |
500 | ||
501 | StorePointer | |
502 | StoreHashIndex::store(int const x) const | |
503 | { | |
504 | return INDEXSD(x); | |
505 | } | |
506 | ||
14911a4e AR |
507 | SwapDir & |
508 | StoreHashIndex::dir(const int i) const | |
509 | { | |
510 | SwapDir *sd = dynamic_cast<SwapDir*>(INDEXSD(i)); | |
511 | assert(sd); | |
512 | return *sd; | |
513 | } | |
514 | ||
cd748f27 | 515 | void |
c8f4eac4 | 516 | StoreController::sync(void) |
cd748f27 | 517 | { |
9487bae9 AR |
518 | if (memStore) |
519 | memStore->sync(); | |
c8f4eac4 | 520 | swapDir->sync(); |
cd748f27 | 521 | } |
522 | ||
523 | /* | |
26ac0430 | 524 | * handle callbacks all avaliable fs'es |
cd748f27 | 525 | */ |
c8f4eac4 | 526 | int |
527 | StoreController::callback() | |
cd748f27 | 528 | { |
1d5161bd | 529 | /* This will likely double count. Thats ok. */ |
530 | PROF_start(storeDirCallback); | |
531 | ||
c8f4eac4 | 532 | /* mem cache callbacks ? */ |
533 | int result = swapDir->callback(); | |
1d5161bd | 534 | |
535 | PROF_stop(storeDirCallback); | |
c8f4eac4 | 536 | |
537 | return result; | |
d141c677 | 538 | } |
90d42c28 | 539 | |
540 | int | |
541 | storeDirGetBlkSize(const char *path, int *blksize) | |
542 | { | |
90d42c28 | 543 | struct statvfs sfs; |
62e76326 | 544 | |
615540cd | 545 | if (xstatvfs(path, &sfs)) { |
e0236918 | 546 | debugs(50, DBG_IMPORTANT, "" << path << ": " << xstrerror()); |
62e76326 | 547 | *blksize = 2048; |
548 | return 1; | |
90d42c28 | 549 | } |
62e76326 | 550 | |
6759a7aa | 551 | *blksize = (int) sfs.f_frsize; |
62e76326 | 552 | |
615540cd | 553 | // Sanity check; make sure we have a meaningful value. |
d5b72fe7 | 554 | if (*blksize < 512) |
62e76326 | 555 | *blksize = 2048; |
556 | ||
90d42c28 | 557 | return 0; |
558 | } | |
781d6656 | 559 | |
560 | #define fsbtoblk(num, fsbs, bs) \ | |
561 | (((fsbs) != 0 && (fsbs) < (bs)) ? \ | |
562 | (num) / ((bs) / (fsbs)) : (num) * ((fsbs) / (bs))) | |
563 | int | |
564 | storeDirGetUFSStats(const char *path, int *totl_kb, int *free_kb, int *totl_in, int *free_in) | |
565 | { | |
781d6656 | 566 | struct statvfs sfs; |
62e76326 | 567 | |
615540cd | 568 | if (xstatvfs(path, &sfs)) { |
e0236918 | 569 | debugs(50, DBG_IMPORTANT, "" << path << ": " << xstrerror()); |
62e76326 | 570 | return 1; |
781d6656 | 571 | } |
62e76326 | 572 | |
781d6656 | 573 | *totl_kb = (int) fsbtoblk(sfs.f_blocks, sfs.f_frsize, 1024); |
574 | *free_kb = (int) fsbtoblk(sfs.f_bfree, sfs.f_frsize, 1024); | |
575 | *totl_in = (int) sfs.f_files; | |
576 | *free_in = (int) sfs.f_ffree; | |
781d6656 | 577 | return 0; |
578 | } | |
c8f4eac4 | 579 | |
580 | void | |
e1f7507e | 581 | allocate_new_swapdir(SquidConfig::_cacheSwap * swap) |
c8f4eac4 | 582 | { |
583 | if (swap->swapDirs == NULL) { | |
584 | swap->n_allocated = 4; | |
7d3c4ca1 | 585 | swap->swapDirs = static_cast<SwapDir::Pointer *>(xcalloc(swap->n_allocated, sizeof(SwapDir::Pointer))); |
c8f4eac4 | 586 | } |
587 | ||
588 | if (swap->n_allocated == swap->n_configured) { | |
c8f4eac4 | 589 | swap->n_allocated <<= 1; |
7d3c4ca1 | 590 | SwapDir::Pointer *const tmp = static_cast<SwapDir::Pointer *>(xcalloc(swap->n_allocated, sizeof(SwapDir::Pointer))); |
41d00cd3 | 591 | memcpy(tmp, swap->swapDirs, swap->n_configured * sizeof(SwapDir *)); |
c8f4eac4 | 592 | xfree(swap->swapDirs); |
593 | swap->swapDirs = tmp; | |
594 | } | |
595 | } | |
596 | ||
597 | void | |
e1f7507e | 598 | free_cachedir(SquidConfig::_cacheSwap * swap) |
c8f4eac4 | 599 | { |
600 | int i; | |
601 | /* DON'T FREE THESE FOR RECONFIGURE */ | |
602 | ||
603 | if (reconfiguring) | |
604 | return; | |
605 | ||
5db6bf73 | 606 | for (i = 0; i < swap->n_configured; ++i) { |
c8f4eac4 | 607 | /* TODO XXX this lets the swapdir free resources asynchronously |
608 | * swap->swapDirs[i]->deactivate(); | |
26ac0430 | 609 | * but there may be such a means already. |
c8f4eac4 | 610 | * RBC 20041225 |
611 | */ | |
612 | swap->swapDirs[i] = NULL; | |
613 | } | |
614 | ||
615 | safe_free(swap->swapDirs); | |
616 | swap->swapDirs = NULL; | |
617 | swap->n_allocated = 0; | |
618 | swap->n_configured = 0; | |
619 | } | |
620 | ||
621 | /* this should be a virtual method on StoreEntry, | |
622 | * i.e. e->referenced() | |
623 | * so that the entry can notify the creating Store | |
624 | */ | |
625 | void | |
626 | StoreController::reference(StoreEntry &e) | |
627 | { | |
c5426f8f AR |
628 | // special entries do not belong to any specific Store, but are IN_MEMORY |
629 | if (EBIT_TEST(e.flags, ENTRY_SPECIAL)) | |
630 | return; | |
631 | ||
c8f4eac4 | 632 | /* Notify the fs that we're referencing this object again */ |
633 | ||
634 | if (e.swap_dirn > -1) | |
4c973beb | 635 | swapDir->reference(e); |
c8f4eac4 | 636 | |
9487bae9 AR |
637 | // Notify the memory cache that we're referencing this object again |
638 | if (memStore && e.mem_status == IN_MEMORY) | |
639 | memStore->reference(e); | |
640 | ||
641 | // TODO: move this code to a non-shared memory cache class when we have it | |
c8f4eac4 | 642 | if (e.mem_obj) { |
643 | if (mem_policy->Referenced) | |
644 | mem_policy->Referenced(mem_policy, &e, &e.mem_obj->repl); | |
645 | } | |
646 | } | |
647 | ||
4c973beb | 648 | bool |
54347cbd | 649 | StoreController::dereference(StoreEntry &e, bool wantsLocalMemory) |
c8f4eac4 | 650 | { |
c5426f8f AR |
651 | // special entries do not belong to any specific Store, but are IN_MEMORY |
652 | if (EBIT_TEST(e.flags, ENTRY_SPECIAL)) | |
54347cbd AR |
653 | return true; |
654 | ||
655 | bool keepInStoreTable = false; // keep only if somebody needs it there | |
c5426f8f | 656 | |
c8f4eac4 | 657 | /* Notify the fs that we're not referencing this object any more */ |
658 | ||
659 | if (e.swap_filen > -1) | |
54347cbd | 660 | keepInStoreTable = swapDir->dereference(e, wantsLocalMemory) || keepInStoreTable; |
c8f4eac4 | 661 | |
9487bae9 AR |
662 | // Notify the memory cache that we're not referencing this object any more |
663 | if (memStore && e.mem_status == IN_MEMORY) | |
54347cbd | 664 | keepInStoreTable = memStore->dereference(e, wantsLocalMemory) || keepInStoreTable; |
9487bae9 AR |
665 | |
666 | // TODO: move this code to a non-shared memory cache class when we have it | |
c8f4eac4 | 667 | if (e.mem_obj) { |
668 | if (mem_policy->Dereferenced) | |
669 | mem_policy->Dereferenced(mem_policy, &e, &e.mem_obj->repl); | |
54347cbd AR |
670 | // non-shared memory cache relies on store_table |
671 | if (!memStore) | |
672 | keepInStoreTable = wantsLocalMemory || keepInStoreTable; | |
c8f4eac4 | 673 | } |
4c973beb AR |
674 | |
675 | return keepInStoreTable; | |
c8f4eac4 | 676 | } |
677 | ||
678 | StoreEntry * | |
6ca34f6f | 679 | StoreController::get(const cache_key *key) |
1bfe9ade AR |
680 | { |
681 | if (StoreEntry *e = find(key)) { | |
682 | // this is not very precise: some get()s are not initiated by clients | |
9d4e9cfb | 683 | e->touch(); |
1bfe9ade AR |
684 | return e; |
685 | } | |
686 | return NULL; | |
687 | } | |
688 | ||
689 | /// Internal method to implements the guts of the Store::get() API: | |
690 | /// returns an in-transit or cached object with a given key, if any. | |
691 | StoreEntry * | |
692 | StoreController::find(const cache_key *key) | |
c8f4eac4 | 693 | { |
44def0f9 | 694 | if (StoreEntry *e = swapDir->get(key)) { |
9487bae9 AR |
695 | // TODO: ignore and maybe handleIdleEntry() unlocked intransit entries |
696 | // because their backing store slot may be gone already. | |
171d5429 | 697 | debugs(20, 3, HERE << "got in-transit entry: " << *e); |
44def0f9 AR |
698 | return e; |
699 | } | |
700 | ||
99921d9d AR |
701 | // Must search transients before caches because we must sync those we find. |
702 | if (transients) { | |
703 | if (StoreEntry *e = transients->get(key)) { | |
704 | debugs(20, 3, "got shared in-transit entry: " << *e); | |
705 | bool inSync = false; | |
706 | const bool found = anchorCollapsed(*e, inSync); | |
707 | if (!found || inSync) | |
708 | return e; | |
709 | assert(!e->locked()); // ensure release will destroyStoreEntry() | |
710 | e->release(); // do not let others into the same trap | |
711 | return NULL; | |
712 | } | |
713 | } | |
714 | ||
9487bae9 AR |
715 | if (memStore) { |
716 | if (StoreEntry *e = memStore->get(key)) { | |
717 | debugs(20, 3, HERE << "got mem-cached entry: " << *e); | |
718 | return e; | |
719 | } | |
720 | } | |
721 | ||
022f96ad AR |
722 | // TODO: this disk iteration is misplaced; move to StoreHashIndex when |
723 | // the global store_table is no longer used for in-transit objects. | |
44def0f9 AR |
724 | if (const int cacheDirs = Config.cacheSwap.n_configured) { |
725 | // ask each cache_dir until the entry is found; use static starting | |
726 | // point to avoid asking the same subset of disks more often | |
727 | // TODO: coordinate with put() to be able to guess the right disk often | |
14911a4e | 728 | static int idx = 0; |
44def0f9 | 729 | for (int n = 0; n < cacheDirs; ++n) { |
14911a4e | 730 | idx = (idx + 1) % cacheDirs; |
44def0f9 | 731 | SwapDir *sd = dynamic_cast<SwapDir*>(INDEXSD(idx)); |
14911a4e AR |
732 | if (!sd->active()) |
733 | continue; | |
734 | ||
44def0f9 | 735 | if (StoreEntry *e = sd->get(key)) { |
eccba1d9 | 736 | debugs(20, 3, HERE << "cache_dir " << idx << |
9199139f | 737 | " got cached entry: " << *e); |
44def0f9 AR |
738 | return e; |
739 | } | |
740 | } | |
741 | } | |
c8f4eac4 | 742 | |
eccba1d9 | 743 | debugs(20, 4, HERE << "none of " << Config.cacheSwap.n_configured << |
9199139f | 744 | " cache_dirs have " << storeKeyText(key)); |
44def0f9 | 745 | return NULL; |
c8f4eac4 | 746 | } |
747 | ||
748 | void | |
6ca34f6f | 749 | StoreController::get(String const key, STOREGETCLIENT aCallback, void *aCallbackData) |
c8f4eac4 | 750 | { |
751 | fatal("not implemented"); | |
752 | } | |
753 | ||
ce49546e | 754 | /// updates the collapsed entry with the corresponding on-disk entry, if any |
4475555f | 755 | /// In other words, the SwapDir::anchorCollapsed() API applied to all disks. |
ce49546e | 756 | bool |
4475555f | 757 | StoreController::anchorCollapsedOnDisk(StoreEntry &collapsed, bool &inSync) |
ce49546e AR |
758 | { |
759 | // TODO: move this loop to StoreHashIndex, just like the one in get(). | |
760 | if (const int cacheDirs = Config.cacheSwap.n_configured) { | |
761 | // ask each cache_dir until the entry is found; use static starting | |
762 | // point to avoid asking the same subset of disks more often | |
763 | // TODO: coordinate with put() to be able to guess the right disk often | |
764 | static int idx = 0; | |
765 | for (int n = 0; n < cacheDirs; ++n) { | |
766 | idx = (idx + 1) % cacheDirs; | |
767 | SwapDir *sd = dynamic_cast<SwapDir*>(INDEXSD(idx)); | |
768 | if (!sd->active()) | |
769 | continue; | |
770 | ||
4475555f | 771 | if (sd->anchorCollapsed(collapsed, inSync)) { |
ce49546e AR |
772 | debugs(20, 3, "cache_dir " << idx << " anchors " << collapsed); |
773 | return true; | |
774 | } | |
775 | } | |
776 | } | |
777 | ||
778 | debugs(20, 4, "none of " << Config.cacheSwap.n_configured << | |
779 | " cache_dirs have " << collapsed); | |
780 | return false; | |
781 | } | |
782 | ||
1bfe9ade AR |
783 | void StoreController::markForUnlink(StoreEntry &e) |
784 | { | |
785 | if (transients && e.mem_obj && e.mem_obj->xitTable.index >= 0) | |
786 | transients->markForUnlink(e); | |
787 | if (memStore && e.mem_obj && e.mem_obj->memCache.index >= 0) | |
788 | memStore->markForUnlink(e); | |
789 | if (e.swap_filen >= 0) | |
790 | e.store()->markForUnlink(e); | |
791 | } | |
792 | ||
96a7de88 DK |
793 | // move this into [non-shared] memory cache class when we have one |
794 | /// whether e should be kept in local RAM for possible future caching | |
795 | bool | |
97754f5a | 796 | StoreController::keepForLocalMemoryCache(StoreEntry &e) const |
96a7de88 DK |
797 | { |
798 | if (!e.memoryCachable()) | |
799 | return false; | |
800 | ||
801 | // does the current and expected size obey memory caching limits? | |
802 | assert(e.mem_obj); | |
803 | const int64_t loadedSize = e.mem_obj->endOffset(); | |
804 | const int64_t expectedSize = e.mem_obj->expectedReplySize(); // may be < 0 | |
805 | const int64_t ramSize = max(loadedSize, expectedSize); | |
806 | const int64_t ramLimit = min( | |
817138f8 A |
807 | static_cast<int64_t>(Config.memMaxSize), |
808 | static_cast<int64_t>(Config.Store.maxInMemObjSize)); | |
96a7de88 DK |
809 | return ramSize <= ramLimit; |
810 | } | |
811 | ||
812 | void | |
4475555f | 813 | StoreController::memoryOut(StoreEntry &e, const bool preserveSwappable) |
96a7de88 DK |
814 | { |
815 | bool keepInLocalMemory = false; | |
816 | if (memStore) | |
4475555f | 817 | memStore->write(e); // leave keepInLocalMemory false |
96a7de88 DK |
818 | else |
819 | keepInLocalMemory = keepForLocalMemoryCache(e); | |
820 | ||
821 | debugs(20, 7, HERE << "keepInLocalMemory: " << keepInLocalMemory); | |
822 | ||
823 | if (!keepInLocalMemory) | |
824 | e.trimMemory(preserveSwappable); | |
825 | } | |
826 | ||
ce49546e AR |
827 | void |
828 | StoreController::memoryUnlink(StoreEntry &e) | |
829 | { | |
ce49546e AR |
830 | if (memStore) |
831 | memStore->unlink(e); | |
832 | else // TODO: move into [non-shared] memory cache class when we have one | |
833 | e.destroyMemObject(); | |
834 | } | |
835 | ||
4475555f | 836 | void |
29c56e41 | 837 | StoreController::memoryDisconnect(StoreEntry &e) |
4475555f AR |
838 | { |
839 | if (memStore) | |
29c56e41 | 840 | memStore->disconnect(e); |
4475555f AR |
841 | // else nothing to do for non-shared memory cache |
842 | } | |
843 | ||
844 | void | |
845 | StoreController::transientsAbandon(StoreEntry &e) | |
846 | { | |
847 | if (transients) { | |
848 | assert(e.mem_obj); | |
849 | if (e.mem_obj->xitTable.index >= 0) | |
850 | transients->abandon(e); | |
851 | } | |
852 | } | |
853 | ||
99921d9d AR |
854 | void |
855 | StoreController::transientsCompleteWriting(StoreEntry &e) | |
856 | { | |
857 | if (transients) { | |
858 | assert(e.mem_obj); | |
859 | if (e.mem_obj->xitTable.index >= 0) | |
860 | transients->completeWriting(e); | |
861 | } | |
862 | } | |
863 | ||
d366a7fa AR |
864 | int |
865 | StoreController::transientReaders(const StoreEntry &e) const | |
866 | { | |
867 | return (transients && e.mem_obj && e.mem_obj->xitTable.index >= 0) ? | |
9d4e9cfb | 868 | transients->readers(e) : 0; |
d366a7fa AR |
869 | } |
870 | ||
4475555f AR |
871 | void |
872 | StoreController::transientsDisconnect(MemObject &mem_obj) | |
873 | { | |
874 | if (transients) | |
875 | transients->disconnect(mem_obj); | |
876 | } | |
877 | ||
9487bae9 AR |
878 | void |
879 | StoreController::handleIdleEntry(StoreEntry &e) | |
880 | { | |
881 | bool keepInLocalMemory = false; | |
c5426f8f AR |
882 | |
883 | if (EBIT_TEST(e.flags, ENTRY_SPECIAL)) { | |
884 | // Icons (and cache digests?) should stay in store_table until we | |
885 | // have a dedicated storage for them (that would not purge them). | |
886 | // They are not managed [well] by any specific Store handled below. | |
887 | keepInLocalMemory = true; | |
d3cd2e81 | 888 | } else if (memStore) { |
9487bae9 AR |
889 | // leave keepInLocalMemory false; memStore maintains its own cache |
890 | } else { | |
96a7de88 | 891 | keepInLocalMemory = keepForLocalMemoryCache(e) && // in good shape and |
9199139f AR |
892 | // the local memory cache is not overflowing |
893 | (mem_node::InUseCount() <= store_pages_max); | |
9487bae9 AR |
894 | } |
895 | ||
54347cbd | 896 | // An idle, unlocked entry that only belongs to a SwapDir which controls |
4c973beb | 897 | // its own index, should not stay in the global store_table. |
54347cbd | 898 | if (!dereference(e, keepInLocalMemory)) { |
9487bae9 AR |
899 | debugs(20, 5, HERE << "destroying unlocked entry: " << &e << ' ' << e); |
900 | destroyStoreEntry(static_cast<hash_link*>(&e)); | |
901 | return; | |
902 | } | |
903 | ||
c5426f8f AR |
904 | debugs(20, 5, HERE << "keepInLocalMemory: " << keepInLocalMemory); |
905 | ||
9487bae9 AR |
906 | // TODO: move this into [non-shared] memory cache class when we have one |
907 | if (keepInLocalMemory) { | |
908 | e.setMemStatus(IN_MEMORY); | |
909 | e.mem_obj->unlinkRequest(); | |
910 | } else { | |
911 | e.purgeMem(); // may free e | |
912 | } | |
913 | } | |
914 | ||
9a9954ba AR |
915 | void |
916 | StoreController::allowCollapsing(StoreEntry *e, const RequestFlags &reqFlags, | |
917 | const HttpRequestMethod &reqMethod) | |
918 | { | |
919 | e->makePublic(); // this is needed for both local and SMP collapsing | |
920 | if (transients) | |
99921d9d | 921 | transients->startWriting(e, reqFlags, reqMethod); |
4475555f | 922 | debugs(20, 3, "may " << (transients && e->mem_obj->xitTable.index >= 0 ? |
9d4e9cfb | 923 | "SMP-" : "locally-") << "collapse " << *e); |
9a9954ba AR |
924 | } |
925 | ||
ce49546e | 926 | void |
6919be24 | 927 | StoreController::syncCollapsed(const sfileno xitIndex) |
ce49546e | 928 | { |
99921d9d | 929 | assert(transients); |
6919be24 AR |
930 | |
931 | StoreEntry *collapsed = transients->findCollapsed(xitIndex); | |
932 | if (!collapsed) { // the entry is no longer locally active, ignore update | |
933 | debugs(20, 7, "not SMP-syncing not-transient " << xitIndex); | |
99921d9d AR |
934 | return; |
935 | } | |
6919be24 AR |
936 | assert(collapsed->mem_obj); |
937 | assert(collapsed->mem_obj->smpCollapsed); | |
ce49546e AR |
938 | |
939 | debugs(20, 7, "syncing " << *collapsed); | |
940 | ||
6919be24 | 941 | bool abandoned = transients->abandoned(*collapsed); |
4475555f | 942 | bool found = false; |
ce49546e | 943 | bool inSync = false; |
1bfe9ade AR |
944 | if (memStore && collapsed->mem_obj->memCache.io == MemObject::ioDone) { |
945 | found = true; | |
946 | inSync = true; | |
947 | debugs(20, 7, "fully mem-loaded " << *collapsed); | |
948 | } else if (memStore && collapsed->mem_obj->memCache.index >= 0) { | |
4475555f | 949 | found = true; |
ce49546e | 950 | inSync = memStore->updateCollapsed(*collapsed); |
4475555f AR |
951 | } else if (collapsed->swap_filen >= 0) { |
952 | found = true; | |
ce49546e | 953 | inSync = collapsed->store()->updateCollapsed(*collapsed); |
4475555f | 954 | } else { |
99921d9d | 955 | found = anchorCollapsed(*collapsed, inSync); |
4475555f | 956 | } |
ce49546e | 957 | |
6919be24 AR |
958 | if (abandoned && collapsed->store_status == STORE_PENDING) { |
959 | debugs(20, 3, "aborting abandoned but STORE_PENDING " << *collapsed); | |
960 | collapsed->abort(); | |
961 | return; | |
962 | } | |
963 | ||
ce49546e AR |
964 | if (inSync) { |
965 | debugs(20, 5, "synced " << *collapsed); | |
966 | collapsed->invokeHandlers(); | |
4475555f | 967 | } else if (found) { // unrecoverable problem syncing this entry |
99921d9d | 968 | debugs(20, 3, "aborting unsyncable " << *collapsed); |
ce49546e | 969 | collapsed->abort(); |
4475555f AR |
970 | } else { // the entry is still not in one of the caches |
971 | debugs(20, 7, "waiting " << *collapsed); | |
ce49546e AR |
972 | } |
973 | } | |
9a9954ba | 974 | |
99921d9d AR |
975 | /// Called for in-transit entries that are not yet anchored to a cache. |
976 | /// For cached entries, return true after synchronizing them with their cache | |
977 | /// (making inSync true on success). For not-yet-cached entries, return false. | |
978 | bool | |
979 | StoreController::anchorCollapsed(StoreEntry &collapsed, bool &inSync) | |
980 | { | |
981 | // this method is designed to work with collapsed transients only | |
982 | assert(collapsed.mem_obj); | |
983 | assert(collapsed.mem_obj->xitTable.index >= 0); | |
984 | assert(collapsed.mem_obj->smpCollapsed); | |
985 | ||
986 | debugs(20, 7, "anchoring " << collapsed); | |
987 | ||
988 | bool found = false; | |
989 | if (memStore) | |
990 | found = memStore->anchorCollapsed(collapsed, inSync); | |
0cdcf3d7 | 991 | if (!found && Config.cacheSwap.n_configured) |
99921d9d AR |
992 | found = anchorCollapsedOnDisk(collapsed, inSync); |
993 | ||
994 | if (found) { | |
995 | if (inSync) | |
996 | debugs(20, 7, "anchored " << collapsed); | |
997 | else | |
998 | debugs(20, 5, "failed to anchor " << collapsed); | |
999 | } else { | |
1000 | debugs(20, 7, "skipping not yet cached " << collapsed); | |
1001 | } | |
1002 | ||
1003 | return found; | |
1004 | } | |
1005 | ||
c8f4eac4 | 1006 | StoreHashIndex::StoreHashIndex() |
1007 | { | |
47f6e231 | 1008 | if (store_table) |
26ac0430 | 1009 | abort(); |
c8f4eac4 | 1010 | assert (store_table == NULL); |
1011 | } | |
1012 | ||
1013 | StoreHashIndex::~StoreHashIndex() | |
1014 | { | |
1015 | if (store_table) { | |
1016 | hashFreeItems(store_table, destroyStoreEntry); | |
1017 | hashFreeMemory(store_table); | |
1018 | store_table = NULL; | |
1019 | } | |
1020 | } | |
1021 | ||
1022 | int | |
1023 | StoreHashIndex::callback() | |
1024 | { | |
1025 | int result = 0; | |
1026 | int j; | |
1027 | static int ndir = 0; | |
1028 | ||
1029 | do { | |
1030 | j = 0; | |
1031 | ||
5db6bf73 | 1032 | for (int i = 0; i < Config.cacheSwap.n_configured; ++i) { |
c8f4eac4 | 1033 | if (ndir >= Config.cacheSwap.n_configured) |
1034 | ndir = ndir % Config.cacheSwap.n_configured; | |
1035 | ||
1036 | int temp_result = store(ndir)->callback(); | |
1037 | ||
1038 | ++ndir; | |
1039 | ||
1040 | j += temp_result; | |
1041 | ||
1042 | result += temp_result; | |
1043 | ||
1044 | if (j > 100) | |
1045 | fatal ("too much io\n"); | |
1046 | } | |
1047 | } while (j > 0); | |
1048 | ||
5db6bf73 | 1049 | ++ndir; |
c8f4eac4 | 1050 | |
1051 | return result; | |
1052 | } | |
1053 | ||
1054 | void | |
1055 | StoreHashIndex::create() | |
1056 | { | |
608622b8 | 1057 | if (Config.cacheSwap.n_configured == 0) { |
a8163539 TX |
1058 | debugs(0, DBG_PARSE_NOTE(DBG_CRITICAL), "No cache_dir stores are configured."); |
1059 | } | |
1060 | ||
5db6bf73 | 1061 | for (int i = 0; i < Config.cacheSwap.n_configured; ++i) { |
14911a4e AR |
1062 | if (dir(i).active()) |
1063 | store(i)->create(); | |
1064 | } | |
c8f4eac4 | 1065 | } |
1066 | ||
1067 | /* Lookup an object in the cache. | |
1068 | * return just a reference to object, don't start swapping in yet. */ | |
1069 | StoreEntry * | |
6ca34f6f | 1070 | StoreHashIndex::get(const cache_key *key) |
c8f4eac4 | 1071 | { |
1072 | PROF_start(storeGet); | |
bf8fe701 | 1073 | debugs(20, 3, "storeGet: looking up " << storeKeyText(key)); |
c8f4eac4 | 1074 | StoreEntry *p = static_cast<StoreEntry *>(hash_lookup(store_table, key)); |
1075 | PROF_stop(storeGet); | |
1076 | return p; | |
1077 | } | |
1078 | ||
1079 | void | |
6ca34f6f | 1080 | StoreHashIndex::get(String const key, STOREGETCLIENT aCallback, void *aCallbackData) |
c8f4eac4 | 1081 | { |
1082 | fatal("not implemented"); | |
1083 | } | |
1084 | ||
1085 | void | |
1086 | StoreHashIndex::init() | |
1087 | { | |
90d881c4 TX |
1088 | if (Config.Store.objectsPerBucket <= 0) |
1089 | fatal("'store_objects_per_bucket' should be larger than 0."); | |
1090 | ||
1091 | if (Config.Store.avgObjectSize <= 0) | |
1092 | fatal("'store_avg_object_size' should be larger than 0."); | |
1093 | ||
c8f4eac4 | 1094 | /* Calculate size of hash table (maximum currently 64k buckets). */ |
1095 | /* this is very bogus, its specific to the any Store maintaining an | |
1096 | * in-core index, not global */ | |
58d5c5dd | 1097 | size_t buckets = (Store::Root().maxSize() + Config.memMaxSize) / Config.Store.avgObjectSize; |
e0236918 | 1098 | debugs(20, DBG_IMPORTANT, "Swap maxSize " << (Store::Root().maxSize() >> 10) << |
13a07022 | 1099 | " + " << ( Config.memMaxSize >> 10) << " KB, estimated " << buckets << " objects"); |
c8f4eac4 | 1100 | buckets /= Config.Store.objectsPerBucket; |
e0236918 | 1101 | debugs(20, DBG_IMPORTANT, "Target number of buckets: " << buckets); |
c8f4eac4 | 1102 | /* ideally the full scan period should be configurable, for the |
1103 | * moment it remains at approximately 24 hours. */ | |
1104 | store_hash_buckets = storeKeyHashBuckets(buckets); | |
e0236918 FC |
1105 | debugs(20, DBG_IMPORTANT, "Using " << store_hash_buckets << " Store buckets"); |
1106 | debugs(20, DBG_IMPORTANT, "Max Mem size: " << ( Config.memMaxSize >> 10) << " KB" << | |
9199139f | 1107 | (Config.memShared ? " [shared]" : "")); |
e0236918 | 1108 | debugs(20, DBG_IMPORTANT, "Max Swap size: " << (Store::Root().maxSize() >> 10) << " KB"); |
c8f4eac4 | 1109 | |
1110 | store_table = hash_create(storeKeyHashCmp, | |
1111 | store_hash_buckets, storeKeyHashHash); | |
1112 | ||
5db6bf73 | 1113 | for (int i = 0; i < Config.cacheSwap.n_configured; ++i) { |
c8f4eac4 | 1114 | /* this starts a search of the store dirs, loading their |
1115 | * index. under the new Store api this should be | |
1116 | * driven by the StoreHashIndex, not by each store. | |
bef81ea5 | 1117 | * |
1118 | * That is, the HashIndex should perform a search of each dir it is | |
26ac0430 | 1119 | * indexing to do the hash insertions. The search is then able to |
bef81ea5 | 1120 | * decide 'from-memory', or 'from-clean-log' or 'from-dirty-log' or |
1121 | * 'from-no-log'. | |
1122 | * | |
c8f4eac4 | 1123 | * Step 1: make the store rebuilds use a search internally |
bef81ea5 | 1124 | * Step 2: change the search logic to use the four modes described |
1125 | * above | |
1126 | * Step 3: have the hash index walk the searches itself. | |
c8f4eac4 | 1127 | */ |
14911a4e AR |
1128 | if (dir(i).active()) |
1129 | store(i)->init(); | |
13a07022 | 1130 | } |
c8f4eac4 | 1131 | } |
1132 | ||
12e11a5c | 1133 | uint64_t |
c8f4eac4 | 1134 | StoreHashIndex::maxSize() const |
1135 | { | |
12e11a5c | 1136 | uint64_t result = 0; |
c8f4eac4 | 1137 | |
5db6bf73 | 1138 | for (int i = 0; i < Config.cacheSwap.n_configured; ++i) { |
39c1e1d9 DK |
1139 | if (dir(i).doReportStat()) |
1140 | result += store(i)->maxSize(); | |
1141 | } | |
c8f4eac4 | 1142 | |
1143 | return result; | |
1144 | } | |
1145 | ||
12e11a5c | 1146 | uint64_t |
c8f4eac4 | 1147 | StoreHashIndex::minSize() const |
1148 | { | |
12e11a5c | 1149 | uint64_t result = 0; |
c8f4eac4 | 1150 | |
5db6bf73 | 1151 | for (int i = 0; i < Config.cacheSwap.n_configured; ++i) { |
39c1e1d9 DK |
1152 | if (dir(i).doReportStat()) |
1153 | result += store(i)->minSize(); | |
1154 | } | |
1155 | ||
1156 | return result; | |
1157 | } | |
1158 | ||
1159 | uint64_t | |
1160 | StoreHashIndex::currentSize() const | |
1161 | { | |
1162 | uint64_t result = 0; | |
1163 | ||
5db6bf73 | 1164 | for (int i = 0; i < Config.cacheSwap.n_configured; ++i) { |
39c1e1d9 DK |
1165 | if (dir(i).doReportStat()) |
1166 | result += store(i)->currentSize(); | |
1167 | } | |
1168 | ||
1169 | return result; | |
1170 | } | |
1171 | ||
1172 | uint64_t | |
1173 | StoreHashIndex::currentCount() const | |
1174 | { | |
1175 | uint64_t result = 0; | |
1176 | ||
5db6bf73 | 1177 | for (int i = 0; i < Config.cacheSwap.n_configured; ++i) { |
39c1e1d9 DK |
1178 | if (dir(i).doReportStat()) |
1179 | result += store(i)->currentCount(); | |
1180 | } | |
c8f4eac4 | 1181 | |
1182 | return result; | |
1183 | } | |
1184 | ||
af2fda07 DK |
1185 | int64_t |
1186 | StoreHashIndex::maxObjectSize() const | |
1187 | { | |
1188 | int64_t result = -1; | |
1189 | ||
5db6bf73 | 1190 | for (int i = 0; i < Config.cacheSwap.n_configured; ++i) { |
af2fda07 DK |
1191 | if (dir(i).active() && store(i)->maxObjectSize() > result) |
1192 | result = store(i)->maxObjectSize(); | |
1193 | } | |
1194 | ||
1195 | return result; | |
1196 | } | |
1197 | ||
93bc1434 AR |
1198 | void |
1199 | StoreHashIndex::getStats(StoreInfoStats &stats) const | |
1200 | { | |
1201 | // accumulate per-disk cache stats | |
5db6bf73 | 1202 | for (int i = 0; i < Config.cacheSwap.n_configured; ++i) { |
93bc1434 AR |
1203 | StoreInfoStats dirStats; |
1204 | store(i)->getStats(dirStats); | |
1205 | stats += dirStats; | |
1206 | } | |
1207 | ||
1208 | // common to all disks | |
1209 | stats.swap.open_disk_fd = store_open_disk_fd; | |
1210 | ||
1211 | // memory cache stats are collected in StoreController::getStats(), for now | |
1212 | } | |
1213 | ||
c8f4eac4 | 1214 | void |
1215 | StoreHashIndex::stat(StoreEntry & output) const | |
1216 | { | |
1217 | int i; | |
1218 | ||
1219 | /* Now go through each store, calling its stat routine */ | |
1220 | ||
5db6bf73 | 1221 | for (i = 0; i < Config.cacheSwap.n_configured; ++i) { |
c8f4eac4 | 1222 | storeAppendPrintf(&output, "\n"); |
1223 | store(i)->stat(output); | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | void | |
4c973beb AR |
1228 | StoreHashIndex::reference(StoreEntry &e) |
1229 | { | |
1230 | e.store()->reference(e); | |
1231 | } | |
c8f4eac4 | 1232 | |
4c973beb | 1233 | bool |
54347cbd | 1234 | StoreHashIndex::dereference(StoreEntry &e, bool wantsLocalMemory) |
4c973beb | 1235 | { |
54347cbd | 1236 | return e.store()->dereference(e, wantsLocalMemory); |
4c973beb | 1237 | } |
c8f4eac4 | 1238 | |
1239 | void | |
1240 | StoreHashIndex::maintain() | |
1241 | { | |
1242 | int i; | |
1243 | /* walk each fs */ | |
1244 | ||
5db6bf73 | 1245 | for (i = 0; i < Config.cacheSwap.n_configured; ++i) { |
c8f4eac4 | 1246 | /* XXX FixMe: This should be done "in parallell" on the different |
1247 | * cache_dirs, not one at a time. | |
1248 | */ | |
1249 | /* call the maintain function .. */ | |
1250 | store(i)->maintain(); | |
1251 | } | |
1252 | } | |
1253 | ||
c8f4eac4 | 1254 | void |
1255 | StoreHashIndex::sync() | |
1256 | { | |
1257 | for (int i = 0; i < Config.cacheSwap.n_configured; ++i) | |
1258 | store(i)->sync(); | |
1259 | } | |
1260 | ||
1261 | StoreSearch * | |
30abd221 | 1262 | StoreHashIndex::search(String const url, HttpRequest *) |
c8f4eac4 | 1263 | { |
1264 | if (url.size()) | |
1265 | fatal ("Cannot search by url yet\n"); | |
1266 | ||
1267 | return new StoreSearchHashIndex (this); | |
1268 | } | |
1269 | ||
1270 | CBDATA_CLASS_INIT(StoreSearchHashIndex); | |
aa839030 | 1271 | |
6fd5ccc3 AJ |
1272 | StoreSearchHashIndex::StoreSearchHashIndex(RefCount<StoreHashIndex> aSwapDir) : |
1273 | sd(aSwapDir), | |
1274 | callback(NULL), | |
1275 | cbdata(NULL), | |
1276 | _done(false), | |
1277 | bucket(0) | |
c8f4eac4 | 1278 | {} |
1279 | ||
1280 | /* do not link | |
1281 | StoreSearchHashIndex::StoreSearchHashIndex(StoreSearchHashIndex const &); | |
1282 | */ | |
1283 | ||
1284 | StoreSearchHashIndex::~StoreSearchHashIndex() | |
1285 | {} | |
1286 | ||
1287 | void | |
70efcae0 | 1288 | StoreSearchHashIndex::next(void (aCallback)(void *), void *aCallbackData) |
c8f4eac4 | 1289 | { |
1290 | next(); | |
70efcae0 | 1291 | aCallback (aCallbackData); |
c8f4eac4 | 1292 | } |
1293 | ||
1294 | bool | |
1295 | StoreSearchHashIndex::next() | |
1296 | { | |
cfb88efb | 1297 | if (!entries.empty()) |
c8f4eac4 | 1298 | entries.pop_back(); |
1299 | ||
1300 | while (!isDone() && !entries.size()) | |
1301 | copyBucket(); | |
1302 | ||
1303 | return currentItem() != NULL; | |
1304 | } | |
1305 | ||
1306 | bool | |
1307 | StoreSearchHashIndex::error() const | |
1308 | { | |
1309 | return false; | |
1310 | } | |
1311 | ||
1312 | bool | |
1313 | StoreSearchHashIndex::isDone() const | |
1314 | { | |
1315 | return bucket >= store_hash_buckets || _done; | |
1316 | } | |
1317 | ||
1318 | StoreEntry * | |
1319 | StoreSearchHashIndex::currentItem() | |
1320 | { | |
1321 | if (!entries.size()) | |
1322 | return NULL; | |
1323 | ||
1324 | return entries.back(); | |
1325 | } | |
1326 | ||
1327 | void | |
1328 | StoreSearchHashIndex::copyBucket() | |
1329 | { | |
1330 | /* probably need to lock the store entries... | |
1331 | * we copy them all to prevent races on the links. */ | |
1332 | debugs(47, 3, "StoreSearchHashIndex::copyBucket #" << bucket); | |
1333 | assert (!entries.size()); | |
1334 | hash_link *link_ptr = NULL; | |
1335 | hash_link *link_next = NULL; | |
1336 | link_next = hash_get_bucket(store_table, bucket); | |
1337 | ||
1338 | while (NULL != (link_ptr = link_next)) { | |
1339 | link_next = link_ptr->next; | |
1340 | StoreEntry *e = (StoreEntry *) link_ptr; | |
1341 | ||
1342 | entries.push_back(e); | |
1343 | } | |
1344 | ||
5db6bf73 | 1345 | ++bucket; |
c8f4eac4 | 1346 | debugs(47,3, "got entries: " << entries.size()); |
1347 | } |