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9b7de833 | 1 | /* |
b8ae064d | 2 | * Copyright (C) 1996-2023 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. | |
9b7de833 | 7 | */ |
8 | ||
bbc27441 AJ |
9 | /* DEBUG: section 72 Peer Digest Routines */ |
10 | ||
582c2af2 | 11 | #include "squid.h" |
6cfa8966 | 12 | #if USE_CACHE_DIGESTS |
0f783794 | 13 | #include "base/IoManip.h" |
b814e8d4 | 14 | #include "CacheDigest.h" |
a011edee | 15 | #include "CachePeer.h" |
a553a5a3 | 16 | #include "event.h" |
eb13c21e | 17 | #include "FwdState.h" |
af69c635 | 18 | #include "globals.h" |
528b2c61 | 19 | #include "HttpReply.h" |
582c2af2 | 20 | #include "HttpRequest.h" |
308e60be | 21 | #include "internal.h" |
528b2c61 | 22 | #include "MemObject.h" |
b6149797 | 23 | #include "mime_header.h" |
602d9612 | 24 | #include "neighbors.h" |
aa839030 | 25 | #include "PeerDigest.h" |
582c2af2 | 26 | #include "Store.h" |
fb548aaf | 27 | #include "store_key_md5.h" |
598465f1 | 28 | #include "StoreClient.h" |
4e540555 | 29 | #include "tools.h" |
ed6e9fb9 | 30 | #include "util.h" |
598465f1 | 31 | |
9b7de833 | 32 | /* local types */ |
33 | ||
34 | /* local prototypes */ | |
e13ee7ad | 35 | static time_t peerDigestIncDelay(const PeerDigest * pd); |
36 | static time_t peerDigestNewDelay(const StoreEntry * e); | |
37 | static void peerDigestSetCheck(PeerDigest * pd, time_t delay); | |
38 | static EVH peerDigestCheck; | |
39 | static void peerDigestRequest(PeerDigest * pd); | |
add2192d | 40 | static STCB peerDigestHandleReply; |
3dfaa3d2 | 41 | static int peerDigestFetchReply(void *, char *, ssize_t); |
1f140227 | 42 | int peerDigestSwapInCBlock(void *, char *, ssize_t); |
43 | int peerDigestSwapInMask(void *, char *, ssize_t); | |
4b4cd312 | 44 | static int peerDigestFetchedEnough(DigestFetchState * fetch, char *buf, ssize_t size, const char *step_name); |
439deb5c | 45 | static void finishAndDeleteFetch(DigestFetchState *, const char *reason, bool sawError); |
e13ee7ad | 46 | static void peerDigestFetchSetStats(DigestFetchState * fetch); |
47 | static int peerDigestSetCBlock(PeerDigest * pd, const char *buf); | |
48 | static int peerDigestUseful(const PeerDigest * pd); | |
395b813e | 49 | |
9b7de833 | 50 | /* local constants */ |
aa839030 | 51 | Version const CacheDigestVer = { 5, 3 }; |
9d486b43 | 52 | |
9b7de833 | 53 | #define StoreDigestCBlockSize sizeof(StoreDigestCBlock) |
54 | ||
e13ee7ad | 55 | /* min interval for requesting digests from a given peer */ |
f53969cc | 56 | static const time_t PeerDigestReqMinGap = 5 * 60; /* seconds */ |
e13ee7ad | 57 | /* min interval for requesting digests (cumulative request stream) */ |
f53969cc | 58 | static const time_t GlobDigestReqMinGap = 1 * 60; /* seconds */ |
bd890734 | 59 | |
60 | /* local vars */ | |
9d486b43 | 61 | |
f53969cc | 62 | static time_t pd_last_req_time = 0; /* last call to Check */ |
9b7de833 | 63 | |
0f783794 EB |
64 | PeerDigest::PeerDigest(CachePeer * const p): |
65 | peer(p), | |
66 | host(peer->host) // if peer disappears, we will know its name | |
9b7de833 | 67 | { |
b56b37cf | 68 | times.initialized = squid_curtime; |
9b7de833 | 69 | } |
70 | ||
0353e724 | 71 | CBDATA_CLASS_INIT(PeerDigest); |
72 | ||
a44986dc AJ |
73 | CBDATA_CLASS_INIT(DigestFetchState); |
74 | ||
022099cb | 75 | DigestFetchState::DigestFetchState(PeerDigest *aPd, HttpRequest *req) : |
f036532e | 76 | pd(aPd), |
aee3523a AR |
77 | entry(nullptr), |
78 | old_entry(nullptr), | |
79 | sc(nullptr), | |
80 | old_sc(nullptr), | |
a44986dc AJ |
81 | request(req), |
82 | offset(0), | |
83 | mask_offset(0), | |
84 | start_time(squid_curtime), | |
85 | resp_time(0), | |
86 | expires(0), | |
87 | bufofs(0), | |
88 | state(DIGEST_READ_REPLY) | |
89 | { | |
90 | HTTPMSGLOCK(request); | |
91 | ||
92 | sent.msg = 0; | |
93 | sent.bytes = 0; | |
94 | ||
95 | recv.msg = 0; | |
96 | recv.bytes = 0; | |
97 | ||
98 | *buf = 0; | |
99 | } | |
100 | ||
101 | DigestFetchState::~DigestFetchState() | |
102 | { | |
f036532e EB |
103 | if (old_entry) { |
104 | debugs(72, 3, "deleting old entry"); | |
105 | storeUnregister(old_sc, old_entry, this); | |
106 | old_entry->releaseRequest(); | |
107 | old_entry->unlock("DigestFetchState destructed old"); | |
108 | old_entry = nullptr; | |
109 | } | |
110 | ||
a44986dc AJ |
111 | /* unlock everything */ |
112 | storeUnregister(sc, entry, this); | |
113 | ||
114 | entry->unlock("DigestFetchState destructed"); | |
aee3523a | 115 | entry = nullptr; |
a44986dc AJ |
116 | |
117 | HTTPMSGUNLOCK(request); | |
a44986dc AJ |
118 | } |
119 | ||
b56b37cf AJ |
120 | PeerDigest::~PeerDigest() |
121 | { | |
97269a72 EB |
122 | if (times.next_check && eventFind(peerDigestCheck, this)) |
123 | eventDelete(peerDigestCheck, this); | |
b56b37cf AJ |
124 | delete cd; |
125 | // req_result pointer is not owned by us | |
126 | } | |
127 | ||
e13ee7ad | 128 | /* called by peer to indicate that somebody actually needs this digest */ |
129 | void | |
8a6218c6 | 130 | peerDigestNeeded(PeerDigest * pd) |
e13ee7ad | 131 | { |
132 | assert(pd); | |
133 | assert(!pd->flags.needed); | |
134 | assert(!pd->cd); | |
135 | ||
be4d35dc | 136 | pd->flags.needed = true; |
e13ee7ad | 137 | pd->times.needed = squid_curtime; |
f53969cc | 138 | peerDigestSetCheck(pd, 0); /* check asap */ |
e13ee7ad | 139 | } |
140 | ||
e13ee7ad | 141 | /* increment retry delay [after an unsuccessful attempt] */ |
395b813e | 142 | static time_t |
8a6218c6 | 143 | peerDigestIncDelay(const PeerDigest * pd) |
395b813e | 144 | { |
e13ee7ad | 145 | assert(pd); |
146 | return pd->times.retry_delay > 0 ? | |
f53969cc SM |
147 | 2 * pd->times.retry_delay : /* exponential backoff */ |
148 | PeerDigestReqMinGap; /* minimal delay */ | |
395b813e | 149 | } |
150 | ||
62e76326 | 151 | /* artificially increases Expires: setting to avoid race conditions |
e13ee7ad | 152 | * returns the delay till that [increased] expiration time */ |
00485c29 | 153 | static time_t |
e13ee7ad | 154 | peerDigestNewDelay(const StoreEntry * e) |
00485c29 | 155 | { |
e13ee7ad | 156 | assert(e); |
62e76326 | 157 | |
00485c29 | 158 | if (e->expires > 0) |
62e76326 | 159 | return e->expires + PeerDigestReqMinGap - squid_curtime; |
160 | ||
e13ee7ad | 161 | return PeerDigestReqMinGap; |
00485c29 | 162 | } |
163 | ||
e13ee7ad | 164 | /* registers next digest verification */ |
395b813e | 165 | static void |
e13ee7ad | 166 | peerDigestSetCheck(PeerDigest * pd, time_t delay) |
395b813e | 167 | { |
e13ee7ad | 168 | eventAdd("peerDigestCheck", peerDigestCheck, pd, (double) delay, 1); |
169 | pd->times.next_check = squid_curtime + delay; | |
bb790702 | 170 | debugs(72, 3, "peerDigestSetCheck: will check peer " << pd->host << " in " << delay << " secs"); |
e13ee7ad | 171 | } |
172 | ||
e13ee7ad | 173 | /* callback for eventAdd() (with peer digest locked) |
26ac0430 | 174 | * request new digest if our copy is too old or if we lack one; |
e13ee7ad | 175 | * schedule next check otherwise */ |
9b7de833 | 176 | static void |
e13ee7ad | 177 | peerDigestCheck(void *data) |
9b7de833 | 178 | { |
e6ccf245 | 179 | PeerDigest *pd = (PeerDigest *)data; |
e13ee7ad | 180 | time_t req_time; |
181 | ||
e13ee7ad | 182 | assert(!pd->flags.requested); |
5d9bb360 | 183 | |
f53969cc | 184 | pd->times.next_check = 0; /* unknown */ |
e13ee7ad | 185 | |
f036532e | 186 | Assure(pd->peer.valid()); |
62e76326 | 187 | |
0f783794 | 188 | debugs(72, 3, "cache_peer " << RawPointer(pd->peer).orNil()); |
26ac0430 AJ |
189 | debugs(72, 3, "peerDigestCheck: time: " << squid_curtime << |
190 | ", last received: " << (long int) pd->times.received << " (" << | |
bf8fe701 | 191 | std::showpos << (int) (squid_curtime - pd->times.received) << ")"); |
e13ee7ad | 192 | |
193 | /* decide when we should send the request: | |
194 | * request now unless too close to other requests */ | |
195 | req_time = squid_curtime; | |
196 | ||
197 | /* per-peer limit */ | |
62e76326 | 198 | |
e13ee7ad | 199 | if (req_time - pd->times.received < PeerDigestReqMinGap) { |
b4197865 | 200 | debugs(72, 2, "peerDigestCheck: " << pd->host << |
bf8fe701 | 201 | ", avoiding close peer requests (" << |
202 | (int) (req_time - pd->times.received) << " < " << | |
203 | (int) PeerDigestReqMinGap << " secs)."); | |
204 | ||
62e76326 | 205 | req_time = pd->times.received + PeerDigestReqMinGap; |
bd890734 | 206 | } |
62e76326 | 207 | |
e13ee7ad | 208 | /* global limit */ |
209 | if (req_time - pd_last_req_time < GlobDigestReqMinGap) { | |
b4197865 | 210 | debugs(72, 2, "peerDigestCheck: " << pd->host << |
bf8fe701 | 211 | ", avoiding close requests (" << |
212 | (int) (req_time - pd_last_req_time) << " < " << | |
213 | (int) GlobDigestReqMinGap << " secs)."); | |
214 | ||
62e76326 | 215 | req_time = pd_last_req_time + GlobDigestReqMinGap; |
9b7de833 | 216 | } |
62e76326 | 217 | |
e13ee7ad | 218 | if (req_time <= squid_curtime) |
f53969cc | 219 | peerDigestRequest(pd); /* will set pd->flags.requested */ |
e13ee7ad | 220 | else |
62e76326 | 221 | peerDigestSetCheck(pd, req_time - squid_curtime); |
9b7de833 | 222 | } |
223 | ||
e13ee7ad | 224 | /* ask store for a digest */ |
9b7de833 | 225 | static void |
e13ee7ad | 226 | peerDigestRequest(PeerDigest * pd) |
9b7de833 | 227 | { |
0f783794 | 228 | const auto p = pd->peer.get(); // TODO: Replace with a reference. |
9b7de833 | 229 | StoreEntry *e, *old_e; |
aee3523a | 230 | char *url = nullptr; |
190154cf | 231 | HttpRequest *req; |
528b2c61 | 232 | StoreIOBuffer tempBuffer; |
e13ee7ad | 233 | |
aee3523a | 234 | pd->req_result = nullptr; |
be4d35dc | 235 | pd->flags.requested = true; |
e13ee7ad | 236 | |
9b7de833 | 237 | /* compute future request components */ |
62e76326 | 238 | |
7e3ce7b9 | 239 | if (p->digest_url) |
62e76326 | 240 | url = xstrdup(p->digest_url); |
7e3ce7b9 | 241 | else |
c002f0e7 | 242 | url = xstrdup(internalRemoteUri(p->secure.encryptTransport, p->host, p->http_port, "/squid-internal-periodic/", SBuf(StoreDigestFileName))); |
4310f8b0 | 243 | debugs(72, 2, url); |
7e3ce7b9 | 244 | |
ad05b958 | 245 | const auto mx = MasterXaction::MakePortless<XactionInitiator::initCacheDigest>(); |
6c880a16 | 246 | req = HttpRequest::FromUrlXXX(url, mx); |
62e76326 | 247 | |
e13ee7ad | 248 | assert(req); |
62e76326 | 249 | |
9b7de833 | 250 | /* add custom headers */ |
2246b732 | 251 | assert(!req->header.len); |
62e76326 | 252 | |
789217a2 | 253 | req->header.putStr(Http::HdrType::ACCEPT, StoreDigestMimeStr); |
62e76326 | 254 | |
789217a2 | 255 | req->header.putStr(Http::HdrType::ACCEPT, "text/html"); |
62e76326 | 256 | |
89000349 AJ |
257 | if (p->login && |
258 | p->login[0] != '*' && | |
b552ea1f A |
259 | strcmp(p->login, "PASS") != 0 && |
260 | strcmp(p->login, "PASSTHRU") != 0 && | |
98ace3e4 | 261 | strncmp(p->login, "NEGOTIATE",9) != 0 && |
89000349 | 262 | strcmp(p->login, "PROXYPASS") != 0) { |
c486d50a | 263 | req->url.userInfo(SBuf(p->login)); // XXX: performance regression make peer login SBuf as well. |
89000349 | 264 | } |
9b7de833 | 265 | /* create fetch state structure */ |
022099cb | 266 | DigestFetchState *fetch = new DigestFetchState(pd, req); |
e13ee7ad | 267 | |
268 | /* update timestamps */ | |
e13ee7ad | 269 | pd->times.requested = squid_curtime; |
270 | pd_last_req_time = squid_curtime; | |
aeeff7fd | 271 | req->flags.cachable.support(); // prevent RELEASE_REQUEST in storeCreateEntry() |
62e76326 | 272 | |
4310f8b0 | 273 | /* the rest is based on clientReplyContext::processExpired() */ |
e857372a | 274 | req->flags.refresh = true; |
62e76326 | 275 | |
4310f8b0 | 276 | old_e = fetch->old_entry = storeGetPublicByRequest(req); |
62e76326 | 277 | |
d2a6dcba | 278 | // XXX: Missing a hittingRequiresCollapsing() && startCollapsingOn() check. |
9b7de833 | 279 | if (old_e) { |
4310f8b0 | 280 | debugs(72, 5, "found old " << *old_e); |
34266cde | 281 | |
acc5dc4c | 282 | old_e->lock("peerDigestRequest"); |
dba7b575 | 283 | old_e->ensureMemObject(url, url, req->method); |
34266cde | 284 | |
62e76326 | 285 | fetch->old_sc = storeClientListAdd(old_e, fetch); |
9b7de833 | 286 | } |
62e76326 | 287 | |
9b7de833 | 288 | e = fetch->entry = storeCreateEntry(url, url, req->flags, req->method); |
4310f8b0 | 289 | debugs(72, 5, "created " << *e); |
e13ee7ad | 290 | assert(EBIT_TEST(e->flags, KEY_PRIVATE)); |
06d2839d | 291 | fetch->sc = storeClientListAdd(e, fetch); |
9b7de833 | 292 | /* set lastmod to trigger IMS request if possible */ |
62e76326 | 293 | |
122a6e3c AR |
294 | // TODO: Also check for fetch->pd->cd presence as a precondition for sending |
295 | // IMS requests because peerDigestFetchReply() does not accept 304 responses | |
296 | // without an in-memory cache digest. | |
9b7de833 | 297 | if (old_e) |
438b41ba | 298 | e->lastModified(old_e->lastModified()); |
e13ee7ad | 299 | |
9b7de833 | 300 | /* push towards peer cache */ |
e83cc785 | 301 | FwdState::fwdStart(Comm::ConnectionPointer(), e, req); |
62e76326 | 302 | |
598465f1 | 303 | tempBuffer.offset = 0; |
62e76326 | 304 | |
f95db407 | 305 | tempBuffer.length = SM_PAGE_SIZE; |
62e76326 | 306 | |
598465f1 | 307 | tempBuffer.data = fetch->buf; |
62e76326 | 308 | |
598465f1 | 309 | storeClientCopy(fetch->sc, e, tempBuffer, |
62e76326 | 310 | peerDigestHandleReply, fetch); |
7e928efc AJ |
311 | |
312 | safe_free(url); | |
9b7de833 | 313 | } |
314 | ||
add2192d | 315 | /* Handle the data copying .. */ |
316 | ||
317 | /* | |
318 | * This routine handles the copy data and then redirects the | |
319 | * copy to a bunch of subfunctions depending upon the copy state. | |
320 | * It also tracks the buffer offset and "seen", since I'm actually | |
321 | * not interested in rewriting everything to suit my little idea. | |
322 | */ | |
9b7de833 | 323 | static void |
2324cda2 | 324 | peerDigestHandleReply(void *data, StoreIOBuffer receivedData) |
add2192d | 325 | { |
e6ccf245 | 326 | DigestFetchState *fetch = (DigestFetchState *)data; |
add2192d | 327 | int retsize = -1; |
328 | digest_read_state_t prevstate; | |
329 | int newsize; | |
330 | ||
122a6e3c | 331 | if (receivedData.flags.error) { |
439deb5c | 332 | finishAndDeleteFetch(fetch, "failure loading digest reply from Store", true); |
122a6e3c AR |
333 | return; |
334 | } | |
335 | ||
f036532e | 336 | if (!fetch->pd) { |
439deb5c | 337 | finishAndDeleteFetch(fetch, "digest disappeared while loading digest reply from Store", true); |
f036532e EB |
338 | return; |
339 | } | |
340 | ||
2324cda2 | 341 | /* The existing code assumes that the received pointer is |
598465f1 | 342 | * where we asked the data to be put |
343 | */ | |
b6c01a20 | 344 | assert(!receivedData.data || fetch->buf + fetch->bufofs == receivedData.data); |
add2192d | 345 | |
346 | /* Update the buffer size */ | |
2324cda2 | 347 | fetch->bufofs += receivedData.length; |
add2192d | 348 | |
349 | assert(fetch->bufofs <= SM_PAGE_SIZE); | |
350 | ||
351 | /* If we've fetched enough, return */ | |
62e76326 | 352 | |
add2192d | 353 | if (peerDigestFetchedEnough(fetch, fetch->buf, fetch->bufofs, "peerDigestHandleReply")) |
62e76326 | 354 | return; |
add2192d | 355 | |
356 | /* Call the right function based on the state */ | |
357 | /* (Those functions will update the state if needed) */ | |
fa80a8ef | 358 | |
e2848e94 | 359 | /* Give us a temporary reference. Some of the calls we make may |
360 | * try to destroy the fetch structure, and we like to know if they | |
361 | * do | |
bac6d4bd | 362 | */ |
a44986dc | 363 | CbcPointer<DigestFetchState> tmpLock = fetch; |
add2192d | 364 | |
365 | /* Repeat this loop until we're out of data OR the state changes */ | |
366 | /* (So keep going if the state has changed and we still have data */ | |
367 | do { | |
62e76326 | 368 | prevstate = fetch->state; |
369 | ||
370 | switch (fetch->state) { | |
371 | ||
372 | case DIGEST_READ_REPLY: | |
373 | retsize = peerDigestFetchReply(fetch, fetch->buf, fetch->bufofs); | |
374 | break; | |
375 | ||
62e76326 | 376 | case DIGEST_READ_CBLOCK: |
377 | retsize = peerDigestSwapInCBlock(fetch, fetch->buf, fetch->bufofs); | |
378 | break; | |
379 | ||
380 | case DIGEST_READ_MASK: | |
381 | retsize = peerDigestSwapInMask(fetch, fetch->buf, fetch->bufofs); | |
382 | break; | |
383 | ||
384 | case DIGEST_READ_NONE: | |
385 | break; | |
386 | ||
62e76326 | 387 | default: |
388 | fatal("Bad digest transfer mode!\n"); | |
389 | } | |
390 | ||
391 | if (retsize < 0) | |
a44986dc | 392 | return; |
62e76326 | 393 | |
394 | /* | |
395 | * The returned size indicates how much of the buffer was read - | |
396 | * so move the remainder of the buffer to the beginning | |
397 | * and update the bufofs / bufsize | |
398 | */ | |
399 | newsize = fetch->bufofs - retsize; | |
400 | ||
41d00cd3 | 401 | memmove(fetch->buf, fetch->buf + retsize, fetch->bufofs - newsize); |
62e76326 | 402 | |
403 | fetch->bufofs = newsize; | |
add2192d | 404 | |
e2848e94 | 405 | } while (cbdataReferenceValid(fetch) && prevstate != fetch->state && fetch->bufofs > 0); |
add2192d | 406 | |
05cb3e57 EB |
407 | // Check for EOF here, thus giving the parser one extra run. We could avoid this overhead by |
408 | // checking at the beginning of this function. However, in this case, we would have to require | |
409 | // that the parser does not regard EOF as a special condition (it is true now but may change | |
410 | // in the future). | |
122a6e3c | 411 | if (fetch->sc->atEof()) { |
439deb5c | 412 | finishAndDeleteFetch(fetch, "premature end of digest reply", true); |
05cb3e57 EB |
413 | return; |
414 | } | |
415 | ||
add2192d | 416 | /* Update the copy offset */ |
2324cda2 | 417 | fetch->offset += receivedData.length; |
add2192d | 418 | |
419 | /* Schedule another copy */ | |
fa80a8ef | 420 | if (cbdataReferenceValid(fetch)) { |
62e76326 | 421 | StoreIOBuffer tempBuffer; |
422 | tempBuffer.offset = fetch->offset; | |
423 | tempBuffer.length = SM_PAGE_SIZE - fetch->bufofs; | |
424 | tempBuffer.data = fetch->buf + fetch->bufofs; | |
425 | storeClientCopy(fetch->sc, fetch->entry, tempBuffer, | |
426 | peerDigestHandleReply, fetch); | |
add2192d | 427 | } |
add2192d | 428 | } |
429 | ||
122a6e3c | 430 | /// handle HTTP response headers in the initial storeClientCopy() response |
add2192d | 431 | static int |
9b7de833 | 432 | peerDigestFetchReply(void *data, char *buf, ssize_t size) |
433 | { | |
e6ccf245 | 434 | DigestFetchState *fetch = (DigestFetchState *)data; |
f036532e | 435 | const auto pd = fetch->pd.get(); |
e13ee7ad | 436 | assert(pd && buf); |
9b7de833 | 437 | assert(!fetch->offset); |
e13ee7ad | 438 | |
add2192d | 439 | assert(fetch->state == DIGEST_READ_REPLY); |
62e76326 | 440 | |
9b7de833 | 441 | if (peerDigestFetchedEnough(fetch, buf, size, "peerDigestFetchReply")) |
62e76326 | 442 | return -1; |
e13ee7ad | 443 | |
122a6e3c | 444 | { |
66d51f4f AR |
445 | const auto &reply = fetch->entry->mem().freshestReply(); |
446 | const auto status = reply.sline.status(); | |
447 | assert(status != Http::scNone); | |
b4197865 | 448 | debugs(72, 3, "peerDigestFetchReply: " << pd->host << " status: " << status << |
66d51f4f AR |
449 | ", expires: " << (long int) reply.expires << " (" << std::showpos << |
450 | (int) (reply.expires - squid_curtime) << ")"); | |
62e76326 | 451 | |
452 | /* this "if" is based on clientHandleIMSReply() */ | |
453 | ||
955394ce | 454 | if (status == Http::scNotModified) { |
62e76326 | 455 | /* our old entry is fine */ |
456 | assert(fetch->old_entry); | |
457 | ||
e2cc8c07 | 458 | if (!fetch->old_entry->mem_obj->request) |
b248c2a3 | 459 | fetch->old_entry->mem_obj->request = fetch->entry->mem_obj->request; |
62e76326 | 460 | |
461 | assert(fetch->old_entry->mem_obj->request); | |
462 | ||
55e1c6e8 | 463 | if (!Store::Root().updateOnNotModified(fetch->old_entry, *fetch->entry)) { |
439deb5c | 464 | finishAndDeleteFetch(fetch, "header update failure after a 304 response", true); |
55e1c6e8 EB |
465 | return -1; |
466 | } | |
62e76326 | 467 | |
468 | /* get rid of 304 reply */ | |
469 | storeUnregister(fetch->sc, fetch->entry, fetch); | |
470 | ||
acc5dc4c | 471 | fetch->entry->unlock("peerDigestFetchReply 304"); |
62e76326 | 472 | |
473 | fetch->entry = fetch->old_entry; | |
474 | ||
aee3523a | 475 | fetch->old_entry = nullptr; |
62e76326 | 476 | |
477 | /* preserve request -- we need its size to update counters */ | |
478 | /* requestUnlink(r); */ | |
a1b1756c | 479 | /* fetch->entry->mem_obj->request = nullptr; */ |
122a6e3c AR |
480 | |
481 | if (!fetch->pd->cd) { | |
439deb5c | 482 | finishAndDeleteFetch(fetch, "304 without the old in-memory digest", true); |
122a6e3c AR |
483 | return -1; |
484 | } | |
485 | ||
486 | // stay with the old in-memory digest | |
439deb5c | 487 | finishAndDeleteFetch(fetch, "Not modified", false); |
61ddaf9d | 488 | return -1; |
955394ce | 489 | } else if (status == Http::scOkay) { |
62e76326 | 490 | /* get rid of old entry if any */ |
491 | ||
492 | if (fetch->old_entry) { | |
bf8fe701 | 493 | debugs(72, 3, "peerDigestFetchReply: got new digest, releasing old one"); |
62e76326 | 494 | storeUnregister(fetch->old_sc, fetch->old_entry, fetch); |
d88e3c49 | 495 | fetch->old_entry->releaseRequest(); |
acc5dc4c | 496 | fetch->old_entry->unlock("peerDigestFetchReply 200"); |
aee3523a | 497 | fetch->old_entry = nullptr; |
62e76326 | 498 | } |
122a6e3c AR |
499 | |
500 | fetch->state = DIGEST_READ_CBLOCK; | |
62e76326 | 501 | } else { |
502 | /* some kind of a bug */ | |
439deb5c | 503 | finishAndDeleteFetch(fetch, reply.sline.reason(), true); |
f53969cc | 504 | return -1; /* XXX -1 will abort stuff in ReadReply! */ |
62e76326 | 505 | } |
9b7de833 | 506 | } |
62e76326 | 507 | |
122a6e3c | 508 | return 0; // we consumed/used no buffered bytes |
9b7de833 | 509 | } |
510 | ||
1f140227 | 511 | int |
9b7de833 | 512 | peerDigestSwapInCBlock(void *data, char *buf, ssize_t size) |
513 | { | |
e6ccf245 | 514 | DigestFetchState *fetch = (DigestFetchState *)data; |
e13ee7ad | 515 | |
add2192d | 516 | assert(fetch->state == DIGEST_READ_CBLOCK); |
62e76326 | 517 | |
9b7de833 | 518 | if (peerDigestFetchedEnough(fetch, buf, size, "peerDigestSwapInCBlock")) |
62e76326 | 519 | return -1; |
e13ee7ad | 520 | |
e6ccf245 | 521 | if (size >= (ssize_t)StoreDigestCBlockSize) { |
f036532e | 522 | const auto pd = fetch->pd.get(); |
62e76326 | 523 | |
66d51f4f AR |
524 | assert(pd); |
525 | assert(fetch->entry->mem_obj); | |
62e76326 | 526 | |
527 | if (peerDigestSetCBlock(pd, buf)) { | |
528 | /* XXX: soon we will have variable header size */ | |
529 | /* switch to CD buffer and fetch digest guts */ | |
aee3523a | 530 | buf = nullptr; |
62e76326 | 531 | assert(pd->cd->mask); |
532 | fetch->state = DIGEST_READ_MASK; | |
533 | return StoreDigestCBlockSize; | |
534 | } else { | |
439deb5c | 535 | finishAndDeleteFetch(fetch, "invalid digest cblock", true); |
62e76326 | 536 | return -1; |
537 | } | |
cfd861ab | 538 | } |
62e76326 | 539 | |
cfd861ab AJ |
540 | /* need more data, do we have space? */ |
541 | if (size >= SM_PAGE_SIZE) { | |
439deb5c | 542 | finishAndDeleteFetch(fetch, "digest cblock too big", true); |
cfd861ab | 543 | return -1; |
9b7de833 | 544 | } |
62e76326 | 545 | |
cfd861ab | 546 | return 0; /* We need more data */ |
9b7de833 | 547 | } |
548 | ||
1f140227 | 549 | int |
9b7de833 | 550 | peerDigestSwapInMask(void *data, char *buf, ssize_t size) |
551 | { | |
e6ccf245 | 552 | DigestFetchState *fetch = (DigestFetchState *)data; |
f036532e EB |
553 | const auto pd = fetch->pd.get(); |
554 | assert(pd); | |
e13ee7ad | 555 | assert(pd->cd && pd->cd->mask); |
9d486b43 | 556 | |
add2192d | 557 | /* |
558 | * NOTENOTENOTENOTENOTE: buf doesn't point to pd->cd->mask anymore! | |
559 | * we need to do the copy ourselves! | |
560 | */ | |
41d00cd3 | 561 | memcpy(pd->cd->mask + fetch->mask_offset, buf, size); |
add2192d | 562 | |
563 | /* NOTE! buf points to the middle of pd->cd->mask! */ | |
62e76326 | 564 | |
aee3523a | 565 | if (peerDigestFetchedEnough(fetch, nullptr, size, "peerDigestSwapInMask")) |
62e76326 | 566 | return -1; |
add2192d | 567 | |
da407def | 568 | fetch->mask_offset += size; |
62e76326 | 569 | |
57d55dfa | 570 | if (fetch->mask_offset >= pd->cd->mask_size) { |
e4049756 | 571 | debugs(72, 2, "peerDigestSwapInMask: Done! Got " << |
572 | fetch->mask_offset << ", expected " << pd->cd->mask_size); | |
57d55dfa | 573 | assert(fetch->mask_offset == pd->cd->mask_size); |
aee3523a | 574 | assert(peerDigestFetchedEnough(fetch, nullptr, 0, "peerDigestSwapInMask")); |
f53969cc | 575 | return -1; /* XXX! */ |
9b7de833 | 576 | } |
62e76326 | 577 | |
cfd861ab AJ |
578 | /* We always read everything, so return size */ |
579 | return size; | |
9b7de833 | 580 | } |
581 | ||
582 | static int | |
439deb5c | 583 | peerDigestFetchedEnough(DigestFetchState * fetch, char *, ssize_t size, const char *step_name) |
9b7de833 | 584 | { |
0e3b8c9f AJ |
585 | static const SBuf hostUnknown("<unknown>"); // peer host (if any) |
586 | SBuf host = hostUnknown; | |
587 | ||
f036532e EB |
588 | const auto pd = fetch->pd.get(); |
589 | Assure(pd); | |
aee3523a AR |
590 | const char *reason = nullptr; /* reason for completion */ |
591 | const char *no_bug = nullptr; /* successful completion if set */ | |
e13ee7ad | 592 | |
593 | /* test possible exiting conditions (the same for most steps!) | |
594 | * cases marked with '?!' should not happen */ | |
595 | ||
596 | if (!reason) { | |
f036532e | 597 | host = pd->host; |
e13ee7ad | 598 | } |
62e76326 | 599 | |
e4049756 | 600 | debugs(72, 6, step_name << ": peer " << host << ", offset: " << |
601 | fetch->offset << " size: " << size << "."); | |
e13ee7ad | 602 | |
603 | /* continue checking (with pd and host known and valid) */ | |
62e76326 | 604 | |
e13ee7ad | 605 | if (!reason) { |
f036532e | 606 | if (size < 0) |
62e76326 | 607 | reason = "swap failure"; |
608 | else if (!fetch->entry) | |
609 | reason = "swap aborted?!"; | |
610 | else if (EBIT_TEST(fetch->entry->flags, ENTRY_ABORTED)) | |
611 | reason = "swap aborted"; | |
e13ee7ad | 612 | } |
62e76326 | 613 | |
e13ee7ad | 614 | /* continue checking (maybe-successful eof case) */ |
b6c01a20 | 615 | if (!reason && !size && fetch->state != DIGEST_READ_REPLY) { |
62e76326 | 616 | if (!pd->cd) |
617 | reason = "null digest?!"; | |
831e953c | 618 | else if (fetch->mask_offset != pd->cd->mask_size) |
62e76326 | 619 | reason = "premature end of digest?!"; |
620 | else if (!peerDigestUseful(pd)) | |
621 | reason = "useless digest"; | |
622 | else | |
623 | reason = no_bug = "success"; | |
e13ee7ad | 624 | } |
62e76326 | 625 | |
e13ee7ad | 626 | /* finish if we have a reason */ |
9b7de833 | 627 | if (reason) { |
62e76326 | 628 | const int level = strstr(reason, "?!") ? 1 : 3; |
bf8fe701 | 629 | debugs(72, level, "" << step_name << ": peer " << host << ", exiting after '" << reason << "'"); |
439deb5c | 630 | finishAndDeleteFetch(fetch, reason, !no_bug); |
e13ee7ad | 631 | } |
62e76326 | 632 | |
aee3523a | 633 | return reason != nullptr; |
e13ee7ad | 634 | } |
635 | ||
e13ee7ad | 636 | /* complete the digest transfer, update stats, unlock/release everything */ |
637 | static void | |
439deb5c | 638 | finishAndDeleteFetch(DigestFetchState * const fetch, const char * const reason, const bool err) |
e13ee7ad | 639 | { |
640 | assert(reason); | |
641 | ||
f036532e | 642 | debugs(72, 2, "peer: " << RawPointer(fetch->pd.valid() ? fetch->pd->peer : nullptr).orNil() << ", reason: " << reason << ", err: " << err); |
62e76326 | 643 | |
e13ee7ad | 644 | /* note: order is significant */ |
f036532e EB |
645 | peerDigestFetchSetStats(fetch); |
646 | if (const auto pd = fetch->pd.get()) | |
647 | pd->noteFetchFinished(*fetch, reason, err); | |
62e76326 | 648 | |
f036532e | 649 | delete fetch; |
9b7de833 | 650 | } |
651 | ||
f036532e EB |
652 | void |
653 | PeerDigest::noteFetchFinished(const DigestFetchState &finishedFetch, const char * const outcomeDescription, const bool sawError) | |
9b7de833 | 654 | { |
f036532e EB |
655 | const auto pd = this; // TODO: remove this diff reducer |
656 | const auto fetch = &finishedFetch; // TODO: remove this diff reducer | |
657 | ||
658 | pd->flags.requested = false; | |
659 | pd->req_result = outcomeDescription; | |
660 | ||
e13ee7ad | 661 | pd->times.received = squid_curtime; |
662 | pd->times.req_delay = fetch->resp_time; | |
a0864754 AJ |
663 | pd->stats.sent.kbytes += fetch->sent.bytes; |
664 | pd->stats.recv.kbytes += fetch->recv.bytes; | |
e13ee7ad | 665 | pd->stats.sent.msgs += fetch->sent.msg; |
666 | pd->stats.recv.msgs += fetch->recv.msg; | |
667 | ||
f036532e EB |
668 | if (sawError) { |
669 | debugs(72, DBG_IMPORTANT, "disabling (" << outcomeDescription << ") digest from " << host); | |
62e76326 | 670 | |
f036532e EB |
671 | pd->times.retry_delay = peerDigestIncDelay(pd); |
672 | peerDigestSetCheck(pd, pd->times.retry_delay); | |
a901d0b4 AJ |
673 | delete pd->cd; |
674 | pd->cd = nullptr; | |
62e76326 | 675 | |
be4d35dc | 676 | pd->flags.usable = false; |
e13ee7ad | 677 | } else { |
be4d35dc | 678 | pd->flags.usable = true; |
f036532e EB |
679 | pd->times.retry_delay = 0; |
680 | peerDigestSetCheck(pd, peerDigestNewDelay(fetch->entry)); | |
e13ee7ad | 681 | |
62e76326 | 682 | /* XXX: ugly condition, but how? */ |
e13ee7ad | 683 | |
62e76326 | 684 | if (fetch->entry->store_status == STORE_OK) |
bf8fe701 | 685 | debugs(72, 2, "re-used old digest from " << host); |
62e76326 | 686 | else |
bf8fe701 | 687 | debugs(72, 2, "received valid digest from " << host); |
d1cdaa16 | 688 | } |
9b7de833 | 689 | } |
690 | ||
e13ee7ad | 691 | /* calculate fetch stats after completion */ |
692 | static void | |
693 | peerDigestFetchSetStats(DigestFetchState * fetch) | |
694 | { | |
695 | MemObject *mem; | |
696 | assert(fetch->entry && fetch->request); | |
697 | ||
698 | mem = fetch->entry->mem_obj; | |
699 | assert(mem); | |
700 | ||
701 | /* XXX: outgoing numbers are not precise */ | |
702 | /* XXX: we must distinguish between 304 hits and misses here */ | |
e11fe29a | 703 | fetch->sent.bytes = fetch->request->prefixLen(); |
528b2c61 | 704 | /* XXX: this is slightly wrong: we don't KNOW that the entire memobject |
705 | * was fetched. We only know how big it is | |
706 | */ | |
707 | fetch->recv.bytes = mem->size(); | |
e13ee7ad | 708 | fetch->sent.msg = fetch->recv.msg = 1; |
709 | fetch->expires = fetch->entry->expires; | |
710 | fetch->resp_time = squid_curtime - fetch->start_time; | |
711 | ||
bf8fe701 | 712 | debugs(72, 3, "peerDigestFetchFinish: recv " << fetch->recv.bytes << |
713 | " bytes in " << (int) fetch->resp_time << " secs"); | |
714 | ||
715 | debugs(72, 3, "peerDigestFetchFinish: expires: " << | |
716 | (long int) fetch->expires << " (" << std::showpos << | |
717 | (int) (fetch->expires - squid_curtime) << "), lmt: " << | |
438b41ba EB |
718 | std::noshowpos << (long int) fetch->entry->lastModified() << " (" << |
719 | std::showpos << (int) (fetch->entry->lastModified() - squid_curtime) << | |
bf8fe701 | 720 | ")"); |
721 | ||
f036532e EB |
722 | statCounter.cd.kbytes_sent += fetch->sent.bytes; |
723 | statCounter.cd.kbytes_recv += fetch->recv.bytes; | |
724 | statCounter.cd.msgs_sent += fetch->sent.msg; | |
725 | statCounter.cd.msgs_recv += fetch->recv.msg; | |
e13ee7ad | 726 | } |
727 | ||
9b7de833 | 728 | static int |
8a6218c6 | 729 | peerDigestSetCBlock(PeerDigest * pd, const char *buf) |
9b7de833 | 730 | { |
731 | StoreDigestCBlock cblock; | |
732 | int freed_size = 0; | |
0e3b8c9f | 733 | const auto host = pd->host; |
e13ee7ad | 734 | |
41d00cd3 | 735 | memcpy(&cblock, buf, sizeof(cblock)); |
9b7de833 | 736 | /* network -> host conversions */ |
737 | cblock.ver.current = ntohs(cblock.ver.current); | |
738 | cblock.ver.required = ntohs(cblock.ver.required); | |
739 | cblock.capacity = ntohl(cblock.capacity); | |
740 | cblock.count = ntohl(cblock.count); | |
741 | cblock.del_count = ntohl(cblock.del_count); | |
742 | cblock.mask_size = ntohl(cblock.mask_size); | |
bf8fe701 | 743 | debugs(72, 2, "got digest cblock from " << host << "; ver: " << |
744 | (int) cblock.ver.current << " (req: " << (int) cblock.ver.required << | |
745 | ")"); | |
746 | ||
26ac0430 AJ |
747 | debugs(72, 2, "\t size: " << |
748 | cblock.mask_size << " bytes, e-cnt: " << | |
749 | cblock.count << ", e-util: " << | |
bf8fe701 | 750 | xpercentInt(cblock.count, cblock.capacity) << "%" ); |
6106c6fc | 751 | /* check version requirements (both ways) */ |
62e76326 | 752 | |
9b7de833 | 753 | if (cblock.ver.required > CacheDigestVer.current) { |
e0236918 | 754 | debugs(72, DBG_IMPORTANT, "" << host << " digest requires version " << |
bf8fe701 | 755 | cblock.ver.required << "; have: " << CacheDigestVer.current); |
756 | ||
62e76326 | 757 | return 0; |
9b7de833 | 758 | } |
62e76326 | 759 | |
6106c6fc | 760 | if (cblock.ver.current < CacheDigestVer.required) { |
e0236918 | 761 | debugs(72, DBG_IMPORTANT, "" << host << " digest is version " << |
bf8fe701 | 762 | cblock.ver.current << "; we require: " << |
763 | CacheDigestVer.required); | |
764 | ||
62e76326 | 765 | return 0; |
6106c6fc | 766 | } |
62e76326 | 767 | |
9b7de833 | 768 | /* check consistency */ |
4b4cd312 | 769 | if (cblock.ver.required > cblock.ver.current || |
62e76326 | 770 | cblock.mask_size <= 0 || cblock.capacity <= 0 || |
771 | cblock.bits_per_entry <= 0 || cblock.hash_func_count <= 0) { | |
fa84c01d | 772 | debugs(72, DBG_CRITICAL, "" << host << " digest cblock is corrupted."); |
62e76326 | 773 | return 0; |
9b7de833 | 774 | } |
62e76326 | 775 | |
d1cdaa16 | 776 | /* check consistency further */ |
5bc5e81f | 777 | if ((size_t)cblock.mask_size != CacheDigest::CalcMaskSize(cblock.capacity, cblock.bits_per_entry)) { |
fa84c01d | 778 | debugs(72, DBG_CRITICAL, host << " digest cblock is corrupted " << |
e4049756 | 779 | "(mask size mismatch: " << cblock.mask_size << " ? " << |
5bc5e81f | 780 | CacheDigest::CalcMaskSize(cblock.capacity, cblock.bits_per_entry) |
e4049756 | 781 | << ")."); |
62e76326 | 782 | return 0; |
d1cdaa16 | 783 | } |
62e76326 | 784 | |
d1cdaa16 | 785 | /* there are some things we cannot do yet */ |
786 | if (cblock.hash_func_count != CacheDigestHashFuncCount) { | |
d816f28d | 787 | debugs(72, DBG_CRITICAL, "ERROR: " << host << " digest: unsupported #hash functions: " << |
bf8fe701 | 788 | cblock.hash_func_count << " ? " << CacheDigestHashFuncCount << "."); |
62e76326 | 789 | return 0; |
d1cdaa16 | 790 | } |
62e76326 | 791 | |
9b7de833 | 792 | /* |
793 | * no cblock bugs below this point | |
794 | */ | |
795 | /* check size changes */ | |
e6ccf245 | 796 | if (pd->cd && cblock.mask_size != (ssize_t)pd->cd->mask_size) { |
e4049756 | 797 | debugs(72, 2, host << " digest changed size: " << cblock.mask_size << |
798 | " -> " << pd->cd->mask_size); | |
62e76326 | 799 | freed_size = pd->cd->mask_size; |
a901d0b4 AJ |
800 | delete pd->cd; |
801 | pd->cd = nullptr; | |
9b7de833 | 802 | } |
62e76326 | 803 | |
e13ee7ad | 804 | if (!pd->cd) { |
26ac0430 AJ |
805 | debugs(72, 2, "creating " << host << " digest; size: " << cblock.mask_size << " (" << |
806 | std::showpos << (int) (cblock.mask_size - freed_size) << ") bytes"); | |
e04fc9d3 | 807 | pd->cd = new CacheDigest(cblock.capacity, cblock.bits_per_entry); |
62e76326 | 808 | |
809 | if (cblock.mask_size >= freed_size) | |
a0864754 | 810 | statCounter.cd.memory += (cblock.mask_size - freed_size); |
9b7de833 | 811 | } |
62e76326 | 812 | |
e13ee7ad | 813 | assert(pd->cd); |
9b7de833 | 814 | /* these assignments leave us in an inconsistent state until we finish reading the digest */ |
e13ee7ad | 815 | pd->cd->count = cblock.count; |
816 | pd->cd->del_count = cblock.del_count; | |
9b7de833 | 817 | return 1; |
818 | } | |
819 | ||
9b7de833 | 820 | static int |
8a6218c6 | 821 | peerDigestUseful(const PeerDigest * pd) |
9b7de833 | 822 | { |
d1cdaa16 | 823 | /* TODO: we should calculate the prob of a false hit instead of bit util */ |
6fbd1d41 | 824 | const auto bit_util = pd->cd->usedMaskPercent(); |
62e76326 | 825 | |
6fbd1d41 | 826 | if (bit_util > 65.0) { |
d816f28d | 827 | debugs(72, DBG_CRITICAL, "WARNING: " << pd->host << |
6fbd1d41 | 828 | " peer digest has too many bits on (" << bit_util << "%)."); |
62e76326 | 829 | return 0; |
9b7de833 | 830 | } |
62e76326 | 831 | |
9b7de833 | 832 | return 1; |
833 | } | |
7f6eb0fe | 834 | |
e13ee7ad | 835 | static int |
836 | saneDiff(time_t diff) | |
837 | { | |
3db6fb54 | 838 | return abs((int) diff) > squid_curtime / 2 ? 0 : diff; |
e13ee7ad | 839 | } |
840 | ||
841 | void | |
8a6218c6 | 842 | peerDigestStatsReport(const PeerDigest * pd, StoreEntry * e) |
e13ee7ad | 843 | { |
844 | #define f2s(flag) (pd->flags.flag ? "yes" : "no") | |
38650cc8 | 845 | #define appendTime(tm) storeAppendPrintf(e, "%s\t %10ld\t %+d\t %+d\n", \ |
846 | ""#tm, (long int)pd->times.tm, \ | |
e13ee7ad | 847 | saneDiff(pd->times.tm - squid_curtime), \ |
848 | saneDiff(pd->times.tm - pd->times.initialized)) | |
849 | ||
e13ee7ad | 850 | assert(pd); |
851 | ||
0e3b8c9f AJ |
852 | auto host = pd->host; |
853 | storeAppendPrintf(e, "\npeer digest from " SQUIDSBUFPH "\n", SQUIDSBUFPRINT(host)); | |
e13ee7ad | 854 | |
855 | cacheDigestGuessStatsReport(&pd->stats.guess, e, host); | |
856 | ||
857 | storeAppendPrintf(e, "\nevent\t timestamp\t secs from now\t secs from init\n"); | |
858 | appendTime(initialized); | |
859 | appendTime(needed); | |
860 | appendTime(requested); | |
861 | appendTime(received); | |
862 | appendTime(next_check); | |
863 | ||
864 | storeAppendPrintf(e, "peer digest state:\n"); | |
865 | storeAppendPrintf(e, "\tneeded: %3s, usable: %3s, requested: %3s\n", | |
62e76326 | 866 | f2s(needed), f2s(usable), f2s(requested)); |
e13ee7ad | 867 | storeAppendPrintf(e, "\n\tlast retry delay: %d secs\n", |
62e76326 | 868 | (int) pd->times.retry_delay); |
e13ee7ad | 869 | storeAppendPrintf(e, "\tlast request response time: %d secs\n", |
62e76326 | 870 | (int) pd->times.req_delay); |
e13ee7ad | 871 | storeAppendPrintf(e, "\tlast request result: %s\n", |
62e76326 | 872 | pd->req_result ? pd->req_result : "(none)"); |
e13ee7ad | 873 | |
874 | storeAppendPrintf(e, "\npeer digest traffic:\n"); | |
875 | storeAppendPrintf(e, "\trequests sent: %d, volume: %d KB\n", | |
62e76326 | 876 | pd->stats.sent.msgs, (int) pd->stats.sent.kbytes.kb); |
e13ee7ad | 877 | storeAppendPrintf(e, "\treplies recv: %d, volume: %d KB\n", |
62e76326 | 878 | pd->stats.recv.msgs, (int) pd->stats.recv.kbytes.kb); |
e13ee7ad | 879 | |
880 | storeAppendPrintf(e, "\npeer digest structure:\n"); | |
62e76326 | 881 | |
e13ee7ad | 882 | if (pd->cd) |
62e76326 | 883 | cacheDigestReport(pd->cd, host, e); |
e13ee7ad | 884 | else |
62e76326 | 885 | storeAppendPrintf(e, "\tno in-memory copy\n"); |
e13ee7ad | 886 | } |
887 | ||
7f6eb0fe | 888 | #endif |
f53969cc | 889 |