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9b7de833 | 1 | /* |
4ac4a490 | 2 | * Copyright (C) 1996-2017 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 |
b814e8d4 | 13 | #include "CacheDigest.h" |
a011edee | 14 | #include "CachePeer.h" |
a553a5a3 | 15 | #include "event.h" |
eb13c21e | 16 | #include "FwdState.h" |
af69c635 | 17 | #include "globals.h" |
528b2c61 | 18 | #include "HttpReply.h" |
582c2af2 | 19 | #include "HttpRequest.h" |
308e60be | 20 | #include "internal.h" |
528b2c61 | 21 | #include "MemObject.h" |
b6149797 | 22 | #include "mime_header.h" |
602d9612 | 23 | #include "neighbors.h" |
aa839030 | 24 | #include "PeerDigest.h" |
985c86bc | 25 | #include "SquidTime.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 peerDigestSwapInHeaders(void *, char *, ssize_t); |
43 | int peerDigestSwapInCBlock(void *, char *, ssize_t); | |
44 | int peerDigestSwapInMask(void *, char *, ssize_t); | |
4b4cd312 | 45 | static int peerDigestFetchedEnough(DigestFetchState * fetch, char *buf, ssize_t size, const char *step_name); |
551e60a9 | 46 | static void peerDigestFetchStop(DigestFetchState * fetch, char *buf, const char *reason); |
e13ee7ad | 47 | static void peerDigestFetchAbort(DigestFetchState * fetch, char *buf, const char *reason); |
48 | static void peerDigestReqFinish(DigestFetchState * fetch, char *buf, int, int, int, const char *reason, int err); | |
49 | static void peerDigestPDFinish(DigestFetchState * fetch, int pcb_valid, int err); | |
50 | static void peerDigestFetchFinish(DigestFetchState * fetch, int err); | |
51 | static void peerDigestFetchSetStats(DigestFetchState * fetch); | |
52 | static int peerDigestSetCBlock(PeerDigest * pd, const char *buf); | |
53 | static int peerDigestUseful(const PeerDigest * pd); | |
395b813e | 54 | |
9b7de833 | 55 | /* local constants */ |
aa839030 | 56 | Version const CacheDigestVer = { 5, 3 }; |
9d486b43 | 57 | |
9b7de833 | 58 | #define StoreDigestCBlockSize sizeof(StoreDigestCBlock) |
59 | ||
e13ee7ad | 60 | /* min interval for requesting digests from a given peer */ |
f53969cc | 61 | static const time_t PeerDigestReqMinGap = 5 * 60; /* seconds */ |
e13ee7ad | 62 | /* min interval for requesting digests (cumulative request stream) */ |
f53969cc | 63 | static const time_t GlobDigestReqMinGap = 1 * 60; /* seconds */ |
bd890734 | 64 | |
65 | /* local vars */ | |
9d486b43 | 66 | |
f53969cc | 67 | static time_t pd_last_req_time = 0; /* last call to Check */ |
9b7de833 | 68 | |
e13ee7ad | 69 | /* initialize peer digest */ |
70 | static void | |
a3c6762c | 71 | peerDigestInit(PeerDigest * pd, CachePeer * p) |
9b7de833 | 72 | { |
e13ee7ad | 73 | assert(pd && p); |
74 | ||
75 | memset(pd, 0, sizeof(*pd)); | |
4e454ade | 76 | /* |
77 | * DPW 2007-04-12 | |
78 | * Lock on to the peer here. The corresponding cbdataReferenceDone() | |
79 | * is in peerDigestDestroy(). | |
80 | */ | |
81 | pd->peer = cbdataReference(p); | |
e13ee7ad | 82 | /* if peer disappears, we will know it's name */ |
528b2c61 | 83 | pd->host = p->host; |
e13ee7ad | 84 | |
85 | pd->times.initialized = squid_curtime; | |
9b7de833 | 86 | } |
87 | ||
0353e724 | 88 | CBDATA_CLASS_INIT(PeerDigest); |
89 | ||
a44986dc AJ |
90 | CBDATA_CLASS_INIT(DigestFetchState); |
91 | ||
022099cb | 92 | DigestFetchState::DigestFetchState(PeerDigest *aPd, HttpRequest *req) : |
a44986dc AJ |
93 | pd(cbdataReference(aPd)), |
94 | entry(NULL), | |
95 | old_entry(NULL), | |
96 | sc(NULL), | |
97 | old_sc(NULL), | |
98 | request(req), | |
99 | offset(0), | |
100 | mask_offset(0), | |
101 | start_time(squid_curtime), | |
102 | resp_time(0), | |
103 | expires(0), | |
104 | bufofs(0), | |
105 | state(DIGEST_READ_REPLY) | |
106 | { | |
107 | HTTPMSGLOCK(request); | |
108 | ||
109 | sent.msg = 0; | |
110 | sent.bytes = 0; | |
111 | ||
112 | recv.msg = 0; | |
113 | recv.bytes = 0; | |
114 | ||
115 | *buf = 0; | |
116 | } | |
117 | ||
118 | DigestFetchState::~DigestFetchState() | |
119 | { | |
120 | /* unlock everything */ | |
121 | storeUnregister(sc, entry, this); | |
122 | ||
123 | entry->unlock("DigestFetchState destructed"); | |
124 | entry = NULL; | |
125 | ||
126 | HTTPMSGUNLOCK(request); | |
127 | ||
128 | assert(pd == NULL); | |
129 | } | |
130 | ||
e13ee7ad | 131 | /* allocate new peer digest, call Init, and lock everything */ |
132 | PeerDigest * | |
a3c6762c | 133 | peerDigestCreate(CachePeer * p) |
e13ee7ad | 134 | { |
135 | PeerDigest *pd; | |
8a6218c6 | 136 | assert(p); |
e13ee7ad | 137 | |
0353e724 | 138 | pd = new PeerDigest; |
e13ee7ad | 139 | peerDigestInit(pd, p); |
e13ee7ad | 140 | |
fa80a8ef | 141 | /* XXX This does not look right, and the same thing again in the caller */ |
142 | return cbdataReference(pd); | |
e13ee7ad | 143 | } |
144 | ||
145 | /* call Clean and free/unlock everything */ | |
2d72d4fd | 146 | static void |
8a6218c6 | 147 | peerDigestDestroy(PeerDigest * pd) |
e13ee7ad | 148 | { |
8abf232c | 149 | void *p; |
e13ee7ad | 150 | assert(pd); |
8abf232c | 151 | void * peerTmp = pd->peer; |
e13ee7ad | 152 | |
4e454ade | 153 | /* |
154 | * DPW 2007-04-12 | |
155 | * We locked the peer in peerDigestInit(), this is | |
156 | * where we unlock it. If the peer is still valid, | |
157 | * tell it that the digest is gone. | |
158 | */ | |
8abf232c | 159 | if (cbdataReferenceValidDone(peerTmp, &p)) |
a3c6762c | 160 | peerNoteDigestGone((CachePeer *)p); |
e13ee7ad | 161 | |
a901d0b4 AJ |
162 | delete pd->cd; |
163 | pd->host.clean(); | |
62e76326 | 164 | |
00d77d6b | 165 | delete pd; |
e13ee7ad | 166 | } |
167 | ||
168 | /* called by peer to indicate that somebody actually needs this digest */ | |
169 | void | |
8a6218c6 | 170 | peerDigestNeeded(PeerDigest * pd) |
e13ee7ad | 171 | { |
172 | assert(pd); | |
173 | assert(!pd->flags.needed); | |
174 | assert(!pd->cd); | |
175 | ||
be4d35dc | 176 | pd->flags.needed = true; |
e13ee7ad | 177 | pd->times.needed = squid_curtime; |
f53969cc | 178 | peerDigestSetCheck(pd, 0); /* check asap */ |
e13ee7ad | 179 | } |
180 | ||
181 | /* currently we do not have a reason to disable without destroying */ | |
8a6218c6 | 182 | #if FUTURE_CODE |
395b813e | 183 | /* disables peer for good */ |
184 | static void | |
8a6218c6 | 185 | peerDigestDisable(PeerDigest * pd) |
395b813e | 186 | { |
bf8fe701 | 187 | debugs(72, 2, "peerDigestDisable: peer " << pd->host.buf() << " disabled for good"); |
e13ee7ad | 188 | pd->times.disabled = squid_curtime; |
f53969cc | 189 | pd->times.next_check = -1; /* never */ |
e13ee7ad | 190 | pd->flags.usable = 0; |
191 | ||
a901d0b4 AJ |
192 | delete pd->cd |
193 | pd->cd = nullptr; | |
62e76326 | 194 | |
e13ee7ad | 195 | /* we do not destroy the pd itself to preserve its "history" and stats */ |
395b813e | 196 | } |
62e76326 | 197 | |
e13ee7ad | 198 | #endif |
395b813e | 199 | |
e13ee7ad | 200 | /* increment retry delay [after an unsuccessful attempt] */ |
395b813e | 201 | static time_t |
8a6218c6 | 202 | peerDigestIncDelay(const PeerDigest * pd) |
395b813e | 203 | { |
e13ee7ad | 204 | assert(pd); |
205 | return pd->times.retry_delay > 0 ? | |
f53969cc SM |
206 | 2 * pd->times.retry_delay : /* exponential backoff */ |
207 | PeerDigestReqMinGap; /* minimal delay */ | |
395b813e | 208 | } |
209 | ||
62e76326 | 210 | /* artificially increases Expires: setting to avoid race conditions |
e13ee7ad | 211 | * returns the delay till that [increased] expiration time */ |
00485c29 | 212 | static time_t |
e13ee7ad | 213 | peerDigestNewDelay(const StoreEntry * e) |
00485c29 | 214 | { |
e13ee7ad | 215 | assert(e); |
62e76326 | 216 | |
00485c29 | 217 | if (e->expires > 0) |
62e76326 | 218 | return e->expires + PeerDigestReqMinGap - squid_curtime; |
219 | ||
e13ee7ad | 220 | return PeerDigestReqMinGap; |
00485c29 | 221 | } |
222 | ||
e13ee7ad | 223 | /* registers next digest verification */ |
395b813e | 224 | static void |
e13ee7ad | 225 | peerDigestSetCheck(PeerDigest * pd, time_t delay) |
395b813e | 226 | { |
e13ee7ad | 227 | eventAdd("peerDigestCheck", peerDigestCheck, pd, (double) delay, 1); |
228 | pd->times.next_check = squid_curtime + delay; | |
bb790702 | 229 | debugs(72, 3, "peerDigestSetCheck: will check peer " << pd->host << " in " << delay << " secs"); |
e13ee7ad | 230 | } |
231 | ||
5385c86a | 232 | /* |
233 | * called when peer is about to disappear or have already disappeared | |
234 | */ | |
e13ee7ad | 235 | void |
8a6218c6 | 236 | peerDigestNotePeerGone(PeerDigest * pd) |
237 | { | |
e13ee7ad | 238 | if (pd->flags.requested) { |
bb790702 | 239 | debugs(72, 2, "peerDigest: peer " << pd->host << " gone, will destroy after fetch."); |
62e76326 | 240 | /* do nothing now, the fetching chain will notice and take action */ |
395b813e | 241 | } else { |
bb790702 | 242 | debugs(72, 2, "peerDigest: peer " << pd->host << " is gone, destroying now."); |
62e76326 | 243 | peerDigestDestroy(pd); |
395b813e | 244 | } |
245 | } | |
246 | ||
e13ee7ad | 247 | /* callback for eventAdd() (with peer digest locked) |
26ac0430 | 248 | * request new digest if our copy is too old or if we lack one; |
e13ee7ad | 249 | * schedule next check otherwise */ |
9b7de833 | 250 | static void |
e13ee7ad | 251 | peerDigestCheck(void *data) |
9b7de833 | 252 | { |
e6ccf245 | 253 | PeerDigest *pd = (PeerDigest *)data; |
e13ee7ad | 254 | time_t req_time; |
255 | ||
e13ee7ad | 256 | assert(!pd->flags.requested); |
5d9bb360 | 257 | |
f53969cc | 258 | pd->times.next_check = 0; /* unknown */ |
e13ee7ad | 259 | |
fa80a8ef | 260 | if (!cbdataReferenceValid(pd->peer)) { |
62e76326 | 261 | peerDigestNotePeerGone(pd); |
262 | return; | |
9b7de833 | 263 | } |
62e76326 | 264 | |
cc192b50 | 265 | debugs(72, 3, "peerDigestCheck: peer " << pd->peer->host << ":" << pd->peer->http_port); |
26ac0430 AJ |
266 | debugs(72, 3, "peerDigestCheck: time: " << squid_curtime << |
267 | ", last received: " << (long int) pd->times.received << " (" << | |
bf8fe701 | 268 | std::showpos << (int) (squid_curtime - pd->times.received) << ")"); |
e13ee7ad | 269 | |
270 | /* decide when we should send the request: | |
271 | * request now unless too close to other requests */ | |
272 | req_time = squid_curtime; | |
273 | ||
274 | /* per-peer limit */ | |
62e76326 | 275 | |
e13ee7ad | 276 | if (req_time - pd->times.received < PeerDigestReqMinGap) { |
b4197865 | 277 | debugs(72, 2, "peerDigestCheck: " << pd->host << |
bf8fe701 | 278 | ", avoiding close peer requests (" << |
279 | (int) (req_time - pd->times.received) << " < " << | |
280 | (int) PeerDigestReqMinGap << " secs)."); | |
281 | ||
62e76326 | 282 | req_time = pd->times.received + PeerDigestReqMinGap; |
bd890734 | 283 | } |
62e76326 | 284 | |
e13ee7ad | 285 | /* global limit */ |
286 | if (req_time - pd_last_req_time < GlobDigestReqMinGap) { | |
b4197865 | 287 | debugs(72, 2, "peerDigestCheck: " << pd->host << |
bf8fe701 | 288 | ", avoiding close requests (" << |
289 | (int) (req_time - pd_last_req_time) << " < " << | |
290 | (int) GlobDigestReqMinGap << " secs)."); | |
291 | ||
62e76326 | 292 | req_time = pd_last_req_time + GlobDigestReqMinGap; |
9b7de833 | 293 | } |
62e76326 | 294 | |
e13ee7ad | 295 | if (req_time <= squid_curtime) |
f53969cc | 296 | peerDigestRequest(pd); /* will set pd->flags.requested */ |
e13ee7ad | 297 | else |
62e76326 | 298 | peerDigestSetCheck(pd, req_time - squid_curtime); |
9b7de833 | 299 | } |
300 | ||
e13ee7ad | 301 | /* ask store for a digest */ |
9b7de833 | 302 | static void |
e13ee7ad | 303 | peerDigestRequest(PeerDigest * pd) |
9b7de833 | 304 | { |
a3c6762c | 305 | CachePeer *p = pd->peer; |
9b7de833 | 306 | StoreEntry *e, *old_e; |
7e928efc | 307 | char *url = NULL; |
9d486b43 | 308 | const cache_key *key; |
190154cf | 309 | HttpRequest *req; |
528b2c61 | 310 | StoreIOBuffer tempBuffer; |
e13ee7ad | 311 | |
312 | pd->req_result = NULL; | |
be4d35dc | 313 | pd->flags.requested = true; |
e13ee7ad | 314 | |
9b7de833 | 315 | /* compute future request components */ |
62e76326 | 316 | |
7e3ce7b9 | 317 | if (p->digest_url) |
62e76326 | 318 | url = xstrdup(p->digest_url); |
7e3ce7b9 | 319 | else |
51b5dcf5 | 320 | url = xstrdup(internalRemoteUri(p->host, p->http_port, "/squid-internal-periodic/", SBuf(StoreDigestFileName))); |
7e3ce7b9 | 321 | |
c21ad0f5 | 322 | req = HttpRequest::CreateFromUrl(url); |
62e76326 | 323 | |
e13ee7ad | 324 | assert(req); |
62e76326 | 325 | |
f66a9ef4 | 326 | key = storeKeyPublicByRequest(req); |
62e76326 | 327 | |
bf8fe701 | 328 | debugs(72, 2, "peerDigestRequest: " << url << " key: " << storeKeyText(key)); |
e13ee7ad | 329 | |
9b7de833 | 330 | /* add custom headers */ |
2246b732 | 331 | assert(!req->header.len); |
62e76326 | 332 | |
789217a2 | 333 | req->header.putStr(Http::HdrType::ACCEPT, StoreDigestMimeStr); |
62e76326 | 334 | |
789217a2 | 335 | req->header.putStr(Http::HdrType::ACCEPT, "text/html"); |
62e76326 | 336 | |
89000349 AJ |
337 | if (p->login && |
338 | p->login[0] != '*' && | |
b552ea1f A |
339 | strcmp(p->login, "PASS") != 0 && |
340 | strcmp(p->login, "PASSTHRU") != 0 && | |
98ace3e4 | 341 | strncmp(p->login, "NEGOTIATE",9) != 0 && |
89000349 | 342 | strcmp(p->login, "PROXYPASS") != 0) { |
c486d50a | 343 | req->url.userInfo(SBuf(p->login)); // XXX: performance regression make peer login SBuf as well. |
89000349 | 344 | } |
9b7de833 | 345 | /* create fetch state structure */ |
022099cb | 346 | DigestFetchState *fetch = new DigestFetchState(pd, req); |
e13ee7ad | 347 | |
348 | /* update timestamps */ | |
e13ee7ad | 349 | pd->times.requested = squid_curtime; |
350 | pd_last_req_time = squid_curtime; | |
e857372a | 351 | req->flags.cachable = true; |
62e76326 | 352 | |
9b7de833 | 353 | /* the rest is based on clientProcessExpired() */ |
e857372a | 354 | req->flags.refresh = true; |
62e76326 | 355 | |
c8f4eac4 | 356 | old_e = fetch->old_entry = Store::Root().get(key); |
62e76326 | 357 | |
9b7de833 | 358 | if (old_e) { |
bf8fe701 | 359 | debugs(72, 5, "peerDigestRequest: found old entry"); |
34266cde | 360 | |
acc5dc4c | 361 | old_e->lock("peerDigestRequest"); |
c877c0bc | 362 | old_e->createMemObject(url, url, req->method); |
34266cde | 363 | |
62e76326 | 364 | fetch->old_sc = storeClientListAdd(old_e, fetch); |
9b7de833 | 365 | } |
62e76326 | 366 | |
9b7de833 | 367 | e = fetch->entry = storeCreateEntry(url, url, req->flags, req->method); |
e13ee7ad | 368 | assert(EBIT_TEST(e->flags, KEY_PRIVATE)); |
06d2839d | 369 | fetch->sc = storeClientListAdd(e, fetch); |
9b7de833 | 370 | /* set lastmod to trigger IMS request if possible */ |
62e76326 | 371 | |
9b7de833 | 372 | if (old_e) |
438b41ba | 373 | e->lastModified(old_e->lastModified()); |
e13ee7ad | 374 | |
9b7de833 | 375 | /* push towards peer cache */ |
bf8fe701 | 376 | debugs(72, 3, "peerDigestRequest: forwarding to fwdStart..."); |
62e76326 | 377 | |
e83cc785 | 378 | FwdState::fwdStart(Comm::ConnectionPointer(), e, req); |
62e76326 | 379 | |
598465f1 | 380 | tempBuffer.offset = 0; |
62e76326 | 381 | |
f95db407 | 382 | tempBuffer.length = SM_PAGE_SIZE; |
62e76326 | 383 | |
598465f1 | 384 | tempBuffer.data = fetch->buf; |
62e76326 | 385 | |
598465f1 | 386 | storeClientCopy(fetch->sc, e, tempBuffer, |
62e76326 | 387 | peerDigestHandleReply, fetch); |
7e928efc AJ |
388 | |
389 | safe_free(url); | |
9b7de833 | 390 | } |
391 | ||
add2192d | 392 | /* Handle the data copying .. */ |
393 | ||
394 | /* | |
395 | * This routine handles the copy data and then redirects the | |
396 | * copy to a bunch of subfunctions depending upon the copy state. | |
397 | * It also tracks the buffer offset and "seen", since I'm actually | |
398 | * not interested in rewriting everything to suit my little idea. | |
399 | */ | |
9b7de833 | 400 | static void |
2324cda2 | 401 | peerDigestHandleReply(void *data, StoreIOBuffer receivedData) |
add2192d | 402 | { |
e6ccf245 | 403 | DigestFetchState *fetch = (DigestFetchState *)data; |
add2192d | 404 | int retsize = -1; |
405 | digest_read_state_t prevstate; | |
406 | int newsize; | |
407 | ||
2324cda2 | 408 | assert(fetch->pd && receivedData.data); |
409 | /* The existing code assumes that the received pointer is | |
598465f1 | 410 | * where we asked the data to be put |
411 | */ | |
2324cda2 | 412 | assert(fetch->buf + fetch->bufofs == receivedData.data); |
add2192d | 413 | |
414 | /* Update the buffer size */ | |
2324cda2 | 415 | fetch->bufofs += receivedData.length; |
add2192d | 416 | |
417 | assert(fetch->bufofs <= SM_PAGE_SIZE); | |
418 | ||
419 | /* If we've fetched enough, return */ | |
62e76326 | 420 | |
add2192d | 421 | if (peerDigestFetchedEnough(fetch, fetch->buf, fetch->bufofs, "peerDigestHandleReply")) |
62e76326 | 422 | return; |
add2192d | 423 | |
424 | /* Call the right function based on the state */ | |
425 | /* (Those functions will update the state if needed) */ | |
fa80a8ef | 426 | |
e2848e94 | 427 | /* Give us a temporary reference. Some of the calls we make may |
428 | * try to destroy the fetch structure, and we like to know if they | |
429 | * do | |
bac6d4bd | 430 | */ |
a44986dc | 431 | CbcPointer<DigestFetchState> tmpLock = fetch; |
add2192d | 432 | |
433 | /* Repeat this loop until we're out of data OR the state changes */ | |
434 | /* (So keep going if the state has changed and we still have data */ | |
435 | do { | |
62e76326 | 436 | prevstate = fetch->state; |
437 | ||
438 | switch (fetch->state) { | |
439 | ||
440 | case DIGEST_READ_REPLY: | |
441 | retsize = peerDigestFetchReply(fetch, fetch->buf, fetch->bufofs); | |
442 | break; | |
443 | ||
444 | case DIGEST_READ_HEADERS: | |
445 | retsize = peerDigestSwapInHeaders(fetch, fetch->buf, fetch->bufofs); | |
446 | break; | |
447 | ||
448 | case DIGEST_READ_CBLOCK: | |
449 | retsize = peerDigestSwapInCBlock(fetch, fetch->buf, fetch->bufofs); | |
450 | break; | |
451 | ||
452 | case DIGEST_READ_MASK: | |
453 | retsize = peerDigestSwapInMask(fetch, fetch->buf, fetch->bufofs); | |
454 | break; | |
455 | ||
456 | case DIGEST_READ_NONE: | |
457 | break; | |
458 | ||
459 | case DIGEST_READ_DONE: | |
a44986dc | 460 | return; |
62e76326 | 461 | break; |
462 | ||
463 | default: | |
464 | fatal("Bad digest transfer mode!\n"); | |
465 | } | |
466 | ||
467 | if (retsize < 0) | |
a44986dc | 468 | return; |
62e76326 | 469 | |
470 | /* | |
471 | * The returned size indicates how much of the buffer was read - | |
472 | * so move the remainder of the buffer to the beginning | |
473 | * and update the bufofs / bufsize | |
474 | */ | |
475 | newsize = fetch->bufofs - retsize; | |
476 | ||
41d00cd3 | 477 | memmove(fetch->buf, fetch->buf + retsize, fetch->bufofs - newsize); |
62e76326 | 478 | |
479 | fetch->bufofs = newsize; | |
add2192d | 480 | |
e2848e94 | 481 | } while (cbdataReferenceValid(fetch) && prevstate != fetch->state && fetch->bufofs > 0); |
add2192d | 482 | |
483 | /* Update the copy offset */ | |
2324cda2 | 484 | fetch->offset += receivedData.length; |
add2192d | 485 | |
486 | /* Schedule another copy */ | |
fa80a8ef | 487 | if (cbdataReferenceValid(fetch)) { |
62e76326 | 488 | StoreIOBuffer tempBuffer; |
489 | tempBuffer.offset = fetch->offset; | |
490 | tempBuffer.length = SM_PAGE_SIZE - fetch->bufofs; | |
491 | tempBuffer.data = fetch->buf + fetch->bufofs; | |
492 | storeClientCopy(fetch->sc, fetch->entry, tempBuffer, | |
493 | peerDigestHandleReply, fetch); | |
add2192d | 494 | } |
add2192d | 495 | } |
496 | ||
add2192d | 497 | /* wait for full http headers to be received then parse them */ |
498 | /* | |
499 | * This routine handles parsing the reply line. | |
500 | * If the reply line indicates an OK, the same data is thrown | |
501 | * to SwapInHeaders(). If the reply line is a NOT_MODIFIED, | |
502 | * we simply stop parsing. | |
503 | */ | |
504 | static int | |
9b7de833 | 505 | peerDigestFetchReply(void *data, char *buf, ssize_t size) |
506 | { | |
e6ccf245 | 507 | DigestFetchState *fetch = (DigestFetchState *)data; |
e13ee7ad | 508 | PeerDigest *pd = fetch->pd; |
9bc73deb | 509 | size_t hdr_size; |
e13ee7ad | 510 | assert(pd && buf); |
9b7de833 | 511 | assert(!fetch->offset); |
e13ee7ad | 512 | |
add2192d | 513 | assert(fetch->state == DIGEST_READ_REPLY); |
62e76326 | 514 | |
9b7de833 | 515 | if (peerDigestFetchedEnough(fetch, buf, size, "peerDigestFetchReply")) |
62e76326 | 516 | return -1; |
e13ee7ad | 517 | |
9bc73deb | 518 | if ((hdr_size = headersEnd(buf, size))) { |
62e76326 | 519 | HttpReply const *reply = fetch->entry->getReply(); |
520 | assert(reply); | |
9b769c67 AJ |
521 | assert(reply->sline.status() != Http::scNone); |
522 | const Http::StatusCode status = reply->sline.status(); | |
b4197865 | 523 | debugs(72, 3, "peerDigestFetchReply: " << pd->host << " status: " << status << |
26ac0430 | 524 | ", expires: " << (long int) reply->expires << " (" << std::showpos << |
bf8fe701 | 525 | (int) (reply->expires - squid_curtime) << ")"); |
62e76326 | 526 | |
527 | /* this "if" is based on clientHandleIMSReply() */ | |
528 | ||
955394ce | 529 | if (status == Http::scNotModified) { |
62e76326 | 530 | /* our old entry is fine */ |
531 | assert(fetch->old_entry); | |
532 | ||
b248c2a3 AJ |
533 | if (!fetch->old_entry->mem_obj->request) { |
534 | fetch->old_entry->mem_obj->request = fetch->entry->mem_obj->request; | |
535 | HTTPMSGLOCK(fetch->old_entry->mem_obj->request); | |
536 | } | |
62e76326 | 537 | |
538 | assert(fetch->old_entry->mem_obj->request); | |
539 | ||
abf396ec | 540 | Store::Root().updateOnNotModified(fetch->old_entry, *fetch->entry); |
62e76326 | 541 | |
542 | /* get rid of 304 reply */ | |
543 | storeUnregister(fetch->sc, fetch->entry, fetch); | |
544 | ||
acc5dc4c | 545 | fetch->entry->unlock("peerDigestFetchReply 304"); |
62e76326 | 546 | |
547 | fetch->entry = fetch->old_entry; | |
548 | ||
549 | fetch->old_entry = NULL; | |
550 | ||
551 | /* preserve request -- we need its size to update counters */ | |
552 | /* requestUnlink(r); */ | |
553 | /* fetch->entry->mem_obj->request = NULL; */ | |
955394ce | 554 | } else if (status == Http::scOkay) { |
62e76326 | 555 | /* get rid of old entry if any */ |
556 | ||
557 | if (fetch->old_entry) { | |
bf8fe701 | 558 | debugs(72, 3, "peerDigestFetchReply: got new digest, releasing old one"); |
62e76326 | 559 | storeUnregister(fetch->old_sc, fetch->old_entry, fetch); |
d88e3c49 | 560 | fetch->old_entry->releaseRequest(); |
acc5dc4c | 561 | fetch->old_entry->unlock("peerDigestFetchReply 200"); |
62e76326 | 562 | fetch->old_entry = NULL; |
563 | } | |
564 | } else { | |
565 | /* some kind of a bug */ | |
9b769c67 | 566 | peerDigestFetchAbort(fetch, buf, reply->sline.reason()); |
f53969cc | 567 | return -1; /* XXX -1 will abort stuff in ReadReply! */ |
62e76326 | 568 | } |
569 | ||
570 | /* must have a ready-to-use store entry if we got here */ | |
571 | /* can we stay with the old in-memory digest? */ | |
955394ce | 572 | if (status == Http::scNotModified && fetch->pd->cd) { |
62e76326 | 573 | peerDigestFetchStop(fetch, buf, "Not modified"); |
574 | fetch->state = DIGEST_READ_DONE; | |
575 | } else { | |
576 | fetch->state = DIGEST_READ_HEADERS; | |
577 | } | |
9b7de833 | 578 | } else { |
62e76326 | 579 | /* need more data, do we have space? */ |
580 | ||
581 | if (size >= SM_PAGE_SIZE) | |
582 | peerDigestFetchAbort(fetch, buf, "reply header too big"); | |
9b7de833 | 583 | } |
add2192d | 584 | |
585 | /* We don't want to actually ack that we've handled anything, | |
586 | * otherwise SwapInHeaders() won't get the reply line .. */ | |
587 | return 0; | |
9b7de833 | 588 | } |
589 | ||
590 | /* fetch headers from disk, pass on to SwapInCBlock */ | |
1f140227 | 591 | int |
9b7de833 | 592 | peerDigestSwapInHeaders(void *data, char *buf, ssize_t size) |
593 | { | |
e6ccf245 | 594 | DigestFetchState *fetch = (DigestFetchState *)data; |
9b7de833 | 595 | size_t hdr_size; |
e13ee7ad | 596 | |
add2192d | 597 | assert(fetch->state == DIGEST_READ_HEADERS); |
62e76326 | 598 | |
9b7de833 | 599 | if (peerDigestFetchedEnough(fetch, buf, size, "peerDigestSwapInHeaders")) |
62e76326 | 600 | return -1; |
e13ee7ad | 601 | |
9d486b43 | 602 | assert(!fetch->offset); |
62e76326 | 603 | |
9b7de833 | 604 | if ((hdr_size = headersEnd(buf, size))) { |
62e76326 | 605 | assert(fetch->entry->getReply()); |
9b769c67 | 606 | assert(fetch->entry->getReply()->sline.status() != Http::scNone); |
62e76326 | 607 | |
9b769c67 | 608 | if (fetch->entry->getReply()->sline.status() != Http::scOkay) { |
e0236918 | 609 | debugs(72, DBG_IMPORTANT, "peerDigestSwapInHeaders: " << fetch->pd->host << |
9b769c67 | 610 | " status " << fetch->entry->getReply()->sline.status() << |
bf8fe701 | 611 | " got cached!"); |
612 | ||
62e76326 | 613 | peerDigestFetchAbort(fetch, buf, "internal status error"); |
614 | return -1; | |
615 | } | |
616 | ||
617 | fetch->state = DIGEST_READ_CBLOCK; | |
f53969cc | 618 | return hdr_size; /* Say how much data we read */ |
cfd861ab | 619 | } |
62e76326 | 620 | |
cfd861ab AJ |
621 | /* need more data, do we have space? */ |
622 | if (size >= SM_PAGE_SIZE) { | |
623 | peerDigestFetchAbort(fetch, buf, "stored header too big"); | |
624 | return -1; | |
9b7de833 | 625 | } |
62e76326 | 626 | |
cfd861ab | 627 | return 0; /* We need to read more to parse .. */ |
9b7de833 | 628 | } |
629 | ||
1f140227 | 630 | int |
9b7de833 | 631 | peerDigestSwapInCBlock(void *data, char *buf, ssize_t size) |
632 | { | |
e6ccf245 | 633 | DigestFetchState *fetch = (DigestFetchState *)data; |
e13ee7ad | 634 | |
add2192d | 635 | assert(fetch->state == DIGEST_READ_CBLOCK); |
62e76326 | 636 | |
9b7de833 | 637 | if (peerDigestFetchedEnough(fetch, buf, size, "peerDigestSwapInCBlock")) |
62e76326 | 638 | return -1; |
e13ee7ad | 639 | |
e6ccf245 | 640 | if (size >= (ssize_t)StoreDigestCBlockSize) { |
62e76326 | 641 | PeerDigest *pd = fetch->pd; |
62e76326 | 642 | |
e4a67a80 | 643 | assert(pd && fetch->entry->getReply()); |
62e76326 | 644 | |
645 | if (peerDigestSetCBlock(pd, buf)) { | |
646 | /* XXX: soon we will have variable header size */ | |
647 | /* switch to CD buffer and fetch digest guts */ | |
648 | buf = NULL; | |
649 | assert(pd->cd->mask); | |
650 | fetch->state = DIGEST_READ_MASK; | |
651 | return StoreDigestCBlockSize; | |
652 | } else { | |
653 | peerDigestFetchAbort(fetch, buf, "invalid digest cblock"); | |
654 | return -1; | |
655 | } | |
cfd861ab | 656 | } |
62e76326 | 657 | |
cfd861ab AJ |
658 | /* need more data, do we have space? */ |
659 | if (size >= SM_PAGE_SIZE) { | |
660 | peerDigestFetchAbort(fetch, buf, "digest cblock too big"); | |
661 | return -1; | |
9b7de833 | 662 | } |
62e76326 | 663 | |
cfd861ab | 664 | return 0; /* We need more data */ |
9b7de833 | 665 | } |
666 | ||
1f140227 | 667 | int |
9b7de833 | 668 | peerDigestSwapInMask(void *data, char *buf, ssize_t size) |
669 | { | |
e6ccf245 | 670 | DigestFetchState *fetch = (DigestFetchState *)data; |
e13ee7ad | 671 | PeerDigest *pd; |
672 | ||
e13ee7ad | 673 | pd = fetch->pd; |
674 | assert(pd->cd && pd->cd->mask); | |
9d486b43 | 675 | |
add2192d | 676 | /* |
677 | * NOTENOTENOTENOTENOTE: buf doesn't point to pd->cd->mask anymore! | |
678 | * we need to do the copy ourselves! | |
679 | */ | |
41d00cd3 | 680 | memcpy(pd->cd->mask + fetch->mask_offset, buf, size); |
add2192d | 681 | |
682 | /* NOTE! buf points to the middle of pd->cd->mask! */ | |
62e76326 | 683 | |
add2192d | 684 | if (peerDigestFetchedEnough(fetch, NULL, size, "peerDigestSwapInMask")) |
62e76326 | 685 | return -1; |
add2192d | 686 | |
da407def | 687 | fetch->mask_offset += size; |
62e76326 | 688 | |
57d55dfa | 689 | if (fetch->mask_offset >= pd->cd->mask_size) { |
e4049756 | 690 | debugs(72, 2, "peerDigestSwapInMask: Done! Got " << |
691 | fetch->mask_offset << ", expected " << pd->cd->mask_size); | |
57d55dfa | 692 | assert(fetch->mask_offset == pd->cd->mask_size); |
62e76326 | 693 | assert(peerDigestFetchedEnough(fetch, NULL, 0, "peerDigestSwapInMask")); |
f53969cc | 694 | return -1; /* XXX! */ |
9b7de833 | 695 | } |
62e76326 | 696 | |
cfd861ab AJ |
697 | /* We always read everything, so return size */ |
698 | return size; | |
9b7de833 | 699 | } |
700 | ||
701 | static int | |
4b4cd312 | 702 | peerDigestFetchedEnough(DigestFetchState * fetch, char *buf, ssize_t size, const char *step_name) |
9b7de833 | 703 | { |
e13ee7ad | 704 | PeerDigest *pd = NULL; |
f53969cc SM |
705 | const char *host = "<unknown>"; /* peer host */ |
706 | const char *reason = NULL; /* reason for completion */ | |
707 | const char *no_bug = NULL; /* successful completion if set */ | |
e2848e94 | 708 | const int pdcb_valid = cbdataReferenceValid(fetch->pd); |
709 | const int pcb_valid = cbdataReferenceValid(fetch->pd->peer); | |
e13ee7ad | 710 | |
711 | /* test possible exiting conditions (the same for most steps!) | |
712 | * cases marked with '?!' should not happen */ | |
713 | ||
714 | if (!reason) { | |
62e76326 | 715 | if (!(pd = fetch->pd)) |
716 | reason = "peer digest disappeared?!"; | |
717 | ||
f53969cc | 718 | #if DONT /* WHY NOT? /HNO */ |
62e76326 | 719 | |
720 | else if (!cbdataReferenceValid(pd)) | |
721 | reason = "invalidated peer digest?!"; | |
722 | ||
5385c86a | 723 | #endif |
62e76326 | 724 | |
725 | else | |
b4197865 | 726 | host = pd->host.termedBuf(); |
e13ee7ad | 727 | } |
62e76326 | 728 | |
e4049756 | 729 | debugs(72, 6, step_name << ": peer " << host << ", offset: " << |
730 | fetch->offset << " size: " << size << "."); | |
e13ee7ad | 731 | |
732 | /* continue checking (with pd and host known and valid) */ | |
62e76326 | 733 | |
e13ee7ad | 734 | if (!reason) { |
62e76326 | 735 | if (!cbdataReferenceValid(pd->peer)) |
736 | reason = "peer disappeared"; | |
737 | else if (size < 0) | |
738 | reason = "swap failure"; | |
739 | else if (!fetch->entry) | |
740 | reason = "swap aborted?!"; | |
741 | else if (EBIT_TEST(fetch->entry->flags, ENTRY_ABORTED)) | |
742 | reason = "swap aborted"; | |
e13ee7ad | 743 | } |
62e76326 | 744 | |
e13ee7ad | 745 | /* continue checking (maybe-successful eof case) */ |
746 | if (!reason && !size) { | |
62e76326 | 747 | if (!pd->cd) |
748 | reason = "null digest?!"; | |
831e953c | 749 | else if (fetch->mask_offset != pd->cd->mask_size) |
62e76326 | 750 | reason = "premature end of digest?!"; |
751 | else if (!peerDigestUseful(pd)) | |
752 | reason = "useless digest"; | |
753 | else | |
754 | reason = no_bug = "success"; | |
e13ee7ad | 755 | } |
62e76326 | 756 | |
e13ee7ad | 757 | /* finish if we have a reason */ |
9b7de833 | 758 | if (reason) { |
62e76326 | 759 | const int level = strstr(reason, "?!") ? 1 : 3; |
bf8fe701 | 760 | debugs(72, level, "" << step_name << ": peer " << host << ", exiting after '" << reason << "'"); |
62e76326 | 761 | peerDigestReqFinish(fetch, buf, |
762 | 1, pdcb_valid, pcb_valid, reason, !no_bug); | |
e13ee7ad | 763 | } else { |
62e76326 | 764 | /* paranoid check */ |
765 | assert(pdcb_valid && pcb_valid); | |
e13ee7ad | 766 | } |
62e76326 | 767 | |
e13ee7ad | 768 | return reason != NULL; |
769 | } | |
770 | ||
551e60a9 | 771 | /* call this when all callback data is valid and fetch must be stopped but |
772 | * no error has occurred (e.g. we received 304 reply and reuse old digest) */ | |
773 | static void | |
774 | peerDigestFetchStop(DigestFetchState * fetch, char *buf, const char *reason) | |
775 | { | |
776 | assert(reason); | |
b4197865 | 777 | debugs(72, 2, "peerDigestFetchStop: peer " << fetch->pd->host << ", reason: " << reason); |
551e60a9 | 778 | peerDigestReqFinish(fetch, buf, 1, 1, 1, reason, 0); |
779 | } | |
780 | ||
e13ee7ad | 781 | /* call this when all callback data is valid but something bad happened */ |
782 | static void | |
783 | peerDigestFetchAbort(DigestFetchState * fetch, char *buf, const char *reason) | |
784 | { | |
551e60a9 | 785 | assert(reason); |
b4197865 | 786 | debugs(72, 2, "peerDigestFetchAbort: peer " << fetch->pd->host << ", reason: " << reason); |
e13ee7ad | 787 | peerDigestReqFinish(fetch, buf, 1, 1, 1, reason, 1); |
788 | } | |
789 | ||
790 | /* complete the digest transfer, update stats, unlock/release everything */ | |
791 | static void | |
792 | peerDigestReqFinish(DigestFetchState * fetch, char *buf, | |
62e76326 | 793 | int fcb_valid, int pdcb_valid, int pcb_valid, |
794 | const char *reason, int err) | |
e13ee7ad | 795 | { |
796 | assert(reason); | |
797 | ||
798 | /* must go before peerDigestPDFinish */ | |
62e76326 | 799 | |
e13ee7ad | 800 | if (pdcb_valid) { |
be4d35dc | 801 | fetch->pd->flags.requested = false; |
62e76326 | 802 | fetch->pd->req_result = reason; |
e13ee7ad | 803 | } |
62e76326 | 804 | |
e13ee7ad | 805 | /* schedule next check if peer is still out there */ |
806 | if (pcb_valid) { | |
62e76326 | 807 | PeerDigest *pd = fetch->pd; |
808 | ||
809 | if (err) { | |
810 | pd->times.retry_delay = peerDigestIncDelay(pd); | |
811 | peerDigestSetCheck(pd, pd->times.retry_delay); | |
812 | } else { | |
813 | pd->times.retry_delay = 0; | |
814 | peerDigestSetCheck(pd, peerDigestNewDelay(fetch->entry)); | |
815 | } | |
9b7de833 | 816 | } |
62e76326 | 817 | |
e13ee7ad | 818 | /* note: order is significant */ |
819 | if (fcb_valid) | |
62e76326 | 820 | peerDigestFetchSetStats(fetch); |
821 | ||
e13ee7ad | 822 | if (pdcb_valid) |
62e76326 | 823 | peerDigestPDFinish(fetch, pcb_valid, err); |
824 | ||
e13ee7ad | 825 | if (fcb_valid) |
62e76326 | 826 | peerDigestFetchFinish(fetch, err); |
9b7de833 | 827 | } |
828 | ||
e13ee7ad | 829 | /* destroys digest if peer disappeared |
830 | * must be called only when fetch and pd cbdata are valid */ | |
9b7de833 | 831 | static void |
e13ee7ad | 832 | peerDigestPDFinish(DigestFetchState * fetch, int pcb_valid, int err) |
9b7de833 | 833 | { |
e13ee7ad | 834 | PeerDigest *pd = fetch->pd; |
b4197865 | 835 | const char *host = pd->host.termedBuf(); |
e13ee7ad | 836 | |
837 | pd->times.received = squid_curtime; | |
838 | pd->times.req_delay = fetch->resp_time; | |
a0864754 AJ |
839 | pd->stats.sent.kbytes += fetch->sent.bytes; |
840 | pd->stats.recv.kbytes += fetch->recv.bytes; | |
e13ee7ad | 841 | pd->stats.sent.msgs += fetch->sent.msg; |
842 | pd->stats.recv.msgs += fetch->recv.msg; | |
843 | ||
844 | if (err) { | |
e0236918 | 845 | debugs(72, DBG_IMPORTANT, "" << (pcb_valid ? "temporary " : "" ) << "disabling (" << pd->req_result << ") digest from " << host); |
62e76326 | 846 | |
a901d0b4 AJ |
847 | delete pd->cd; |
848 | pd->cd = nullptr; | |
62e76326 | 849 | |
be4d35dc | 850 | pd->flags.usable = false; |
62e76326 | 851 | |
852 | if (!pcb_valid) | |
853 | peerDigestNotePeerGone(pd); | |
e13ee7ad | 854 | } else { |
62e76326 | 855 | assert(pcb_valid); |
856 | ||
be4d35dc | 857 | pd->flags.usable = true; |
e13ee7ad | 858 | |
62e76326 | 859 | /* XXX: ugly condition, but how? */ |
e13ee7ad | 860 | |
62e76326 | 861 | if (fetch->entry->store_status == STORE_OK) |
bf8fe701 | 862 | debugs(72, 2, "re-used old digest from " << host); |
62e76326 | 863 | else |
bf8fe701 | 864 | debugs(72, 2, "received valid digest from " << host); |
d1cdaa16 | 865 | } |
62e76326 | 866 | |
fa80a8ef | 867 | cbdataReferenceDone(fetch->pd); |
e13ee7ad | 868 | } |
869 | ||
870 | /* free fetch state structures | |
871 | * must be called only when fetch cbdata is valid */ | |
872 | static void | |
873 | peerDigestFetchFinish(DigestFetchState * fetch, int err) | |
874 | { | |
875 | assert(fetch->entry && fetch->request); | |
876 | ||
9b7de833 | 877 | if (fetch->old_entry) { |
48e7baac | 878 | debugs(72, 3, "peerDigestFetchFinish: deleting old entry"); |
8121ba82 | 879 | storeUnregister(fetch->old_sc, fetch->old_entry, fetch); |
d88e3c49 | 880 | fetch->old_entry->releaseRequest(); |
acc5dc4c | 881 | fetch->old_entry->unlock("peerDigestFetchFinish old"); |
62e76326 | 882 | fetch->old_entry = NULL; |
9b7de833 | 883 | } |
62e76326 | 884 | |
1543ab6c | 885 | /* update global stats */ |
a0864754 AJ |
886 | statCounter.cd.kbytes_sent += fetch->sent.bytes; |
887 | statCounter.cd.kbytes_recv += fetch->recv.bytes; | |
83704487 | 888 | statCounter.cd.msgs_sent += fetch->sent.msg; |
889 | statCounter.cd.msgs_recv += fetch->recv.msg; | |
e13ee7ad | 890 | |
a44986dc | 891 | delete fetch; |
9b7de833 | 892 | } |
893 | ||
e13ee7ad | 894 | /* calculate fetch stats after completion */ |
895 | static void | |
896 | peerDigestFetchSetStats(DigestFetchState * fetch) | |
897 | { | |
898 | MemObject *mem; | |
899 | assert(fetch->entry && fetch->request); | |
900 | ||
901 | mem = fetch->entry->mem_obj; | |
902 | assert(mem); | |
903 | ||
904 | /* XXX: outgoing numbers are not precise */ | |
905 | /* XXX: we must distinguish between 304 hits and misses here */ | |
e11fe29a | 906 | fetch->sent.bytes = fetch->request->prefixLen(); |
528b2c61 | 907 | /* XXX: this is slightly wrong: we don't KNOW that the entire memobject |
908 | * was fetched. We only know how big it is | |
909 | */ | |
910 | fetch->recv.bytes = mem->size(); | |
e13ee7ad | 911 | fetch->sent.msg = fetch->recv.msg = 1; |
912 | fetch->expires = fetch->entry->expires; | |
913 | fetch->resp_time = squid_curtime - fetch->start_time; | |
914 | ||
bf8fe701 | 915 | debugs(72, 3, "peerDigestFetchFinish: recv " << fetch->recv.bytes << |
916 | " bytes in " << (int) fetch->resp_time << " secs"); | |
917 | ||
918 | debugs(72, 3, "peerDigestFetchFinish: expires: " << | |
919 | (long int) fetch->expires << " (" << std::showpos << | |
920 | (int) (fetch->expires - squid_curtime) << "), lmt: " << | |
438b41ba EB |
921 | std::noshowpos << (long int) fetch->entry->lastModified() << " (" << |
922 | std::showpos << (int) (fetch->entry->lastModified() - squid_curtime) << | |
bf8fe701 | 923 | ")"); |
924 | ||
e13ee7ad | 925 | } |
926 | ||
9b7de833 | 927 | static int |
8a6218c6 | 928 | peerDigestSetCBlock(PeerDigest * pd, const char *buf) |
9b7de833 | 929 | { |
930 | StoreDigestCBlock cblock; | |
931 | int freed_size = 0; | |
b4197865 | 932 | const char *host = pd->host.termedBuf(); |
e13ee7ad | 933 | |
41d00cd3 | 934 | memcpy(&cblock, buf, sizeof(cblock)); |
9b7de833 | 935 | /* network -> host conversions */ |
936 | cblock.ver.current = ntohs(cblock.ver.current); | |
937 | cblock.ver.required = ntohs(cblock.ver.required); | |
938 | cblock.capacity = ntohl(cblock.capacity); | |
939 | cblock.count = ntohl(cblock.count); | |
940 | cblock.del_count = ntohl(cblock.del_count); | |
941 | cblock.mask_size = ntohl(cblock.mask_size); | |
bf8fe701 | 942 | debugs(72, 2, "got digest cblock from " << host << "; ver: " << |
943 | (int) cblock.ver.current << " (req: " << (int) cblock.ver.required << | |
944 | ")"); | |
945 | ||
26ac0430 AJ |
946 | debugs(72, 2, "\t size: " << |
947 | cblock.mask_size << " bytes, e-cnt: " << | |
948 | cblock.count << ", e-util: " << | |
bf8fe701 | 949 | xpercentInt(cblock.count, cblock.capacity) << "%" ); |
6106c6fc | 950 | /* check version requirements (both ways) */ |
62e76326 | 951 | |
9b7de833 | 952 | if (cblock.ver.required > CacheDigestVer.current) { |
e0236918 | 953 | debugs(72, DBG_IMPORTANT, "" << host << " digest requires version " << |
bf8fe701 | 954 | cblock.ver.required << "; have: " << CacheDigestVer.current); |
955 | ||
62e76326 | 956 | return 0; |
9b7de833 | 957 | } |
62e76326 | 958 | |
6106c6fc | 959 | if (cblock.ver.current < CacheDigestVer.required) { |
e0236918 | 960 | debugs(72, DBG_IMPORTANT, "" << host << " digest is version " << |
bf8fe701 | 961 | cblock.ver.current << "; we require: " << |
962 | CacheDigestVer.required); | |
963 | ||
62e76326 | 964 | return 0; |
6106c6fc | 965 | } |
62e76326 | 966 | |
9b7de833 | 967 | /* check consistency */ |
4b4cd312 | 968 | if (cblock.ver.required > cblock.ver.current || |
62e76326 | 969 | cblock.mask_size <= 0 || cblock.capacity <= 0 || |
970 | cblock.bits_per_entry <= 0 || cblock.hash_func_count <= 0) { | |
fa84c01d | 971 | debugs(72, DBG_CRITICAL, "" << host << " digest cblock is corrupted."); |
62e76326 | 972 | return 0; |
9b7de833 | 973 | } |
62e76326 | 974 | |
d1cdaa16 | 975 | /* check consistency further */ |
5bc5e81f | 976 | if ((size_t)cblock.mask_size != CacheDigest::CalcMaskSize(cblock.capacity, cblock.bits_per_entry)) { |
fa84c01d | 977 | debugs(72, DBG_CRITICAL, host << " digest cblock is corrupted " << |
e4049756 | 978 | "(mask size mismatch: " << cblock.mask_size << " ? " << |
5bc5e81f | 979 | CacheDigest::CalcMaskSize(cblock.capacity, cblock.bits_per_entry) |
e4049756 | 980 | << ")."); |
62e76326 | 981 | return 0; |
d1cdaa16 | 982 | } |
62e76326 | 983 | |
d1cdaa16 | 984 | /* there are some things we cannot do yet */ |
985 | if (cblock.hash_func_count != CacheDigestHashFuncCount) { | |
fa84c01d | 986 | debugs(72, DBG_CRITICAL, "" << host << " digest: unsupported #hash functions: " << |
bf8fe701 | 987 | cblock.hash_func_count << " ? " << CacheDigestHashFuncCount << "."); |
62e76326 | 988 | return 0; |
d1cdaa16 | 989 | } |
62e76326 | 990 | |
9b7de833 | 991 | /* |
992 | * no cblock bugs below this point | |
993 | */ | |
994 | /* check size changes */ | |
e6ccf245 | 995 | if (pd->cd && cblock.mask_size != (ssize_t)pd->cd->mask_size) { |
e4049756 | 996 | debugs(72, 2, host << " digest changed size: " << cblock.mask_size << |
997 | " -> " << pd->cd->mask_size); | |
62e76326 | 998 | freed_size = pd->cd->mask_size; |
a901d0b4 AJ |
999 | delete pd->cd; |
1000 | pd->cd = nullptr; | |
9b7de833 | 1001 | } |
62e76326 | 1002 | |
e13ee7ad | 1003 | if (!pd->cd) { |
26ac0430 AJ |
1004 | debugs(72, 2, "creating " << host << " digest; size: " << cblock.mask_size << " (" << |
1005 | std::showpos << (int) (cblock.mask_size - freed_size) << ") bytes"); | |
e04fc9d3 | 1006 | pd->cd = new CacheDigest(cblock.capacity, cblock.bits_per_entry); |
62e76326 | 1007 | |
1008 | if (cblock.mask_size >= freed_size) | |
a0864754 | 1009 | statCounter.cd.memory += (cblock.mask_size - freed_size); |
9b7de833 | 1010 | } |
62e76326 | 1011 | |
e13ee7ad | 1012 | assert(pd->cd); |
9b7de833 | 1013 | /* these assignments leave us in an inconsistent state until we finish reading the digest */ |
e13ee7ad | 1014 | pd->cd->count = cblock.count; |
1015 | pd->cd->del_count = cblock.del_count; | |
9b7de833 | 1016 | return 1; |
1017 | } | |
1018 | ||
9b7de833 | 1019 | static int |
8a6218c6 | 1020 | peerDigestUseful(const PeerDigest * pd) |
9b7de833 | 1021 | { |
d1cdaa16 | 1022 | /* TODO: we should calculate the prob of a false hit instead of bit util */ |
6fbd1d41 | 1023 | const auto bit_util = pd->cd->usedMaskPercent(); |
62e76326 | 1024 | |
6fbd1d41 | 1025 | if (bit_util > 65.0) { |
fa84c01d | 1026 | debugs(72, DBG_CRITICAL, "Warning: " << pd->host << |
6fbd1d41 | 1027 | " peer digest has too many bits on (" << bit_util << "%)."); |
62e76326 | 1028 | return 0; |
9b7de833 | 1029 | } |
62e76326 | 1030 | |
9b7de833 | 1031 | return 1; |
1032 | } | |
7f6eb0fe | 1033 | |
e13ee7ad | 1034 | static int |
1035 | saneDiff(time_t diff) | |
1036 | { | |
3db6fb54 | 1037 | return abs((int) diff) > squid_curtime / 2 ? 0 : diff; |
e13ee7ad | 1038 | } |
1039 | ||
1040 | void | |
8a6218c6 | 1041 | peerDigestStatsReport(const PeerDigest * pd, StoreEntry * e) |
e13ee7ad | 1042 | { |
1043 | #define f2s(flag) (pd->flags.flag ? "yes" : "no") | |
38650cc8 | 1044 | #define appendTime(tm) storeAppendPrintf(e, "%s\t %10ld\t %+d\t %+d\n", \ |
1045 | ""#tm, (long int)pd->times.tm, \ | |
e13ee7ad | 1046 | saneDiff(pd->times.tm - squid_curtime), \ |
1047 | saneDiff(pd->times.tm - pd->times.initialized)) | |
1048 | ||
e13ee7ad | 1049 | assert(pd); |
1050 | ||
b4197865 | 1051 | const char *host = pd->host.termedBuf(); |
e13ee7ad | 1052 | storeAppendPrintf(e, "\npeer digest from %s\n", host); |
1053 | ||
1054 | cacheDigestGuessStatsReport(&pd->stats.guess, e, host); | |
1055 | ||
1056 | storeAppendPrintf(e, "\nevent\t timestamp\t secs from now\t secs from init\n"); | |
1057 | appendTime(initialized); | |
1058 | appendTime(needed); | |
1059 | appendTime(requested); | |
1060 | appendTime(received); | |
1061 | appendTime(next_check); | |
1062 | ||
1063 | storeAppendPrintf(e, "peer digest state:\n"); | |
1064 | storeAppendPrintf(e, "\tneeded: %3s, usable: %3s, requested: %3s\n", | |
62e76326 | 1065 | f2s(needed), f2s(usable), f2s(requested)); |
e13ee7ad | 1066 | storeAppendPrintf(e, "\n\tlast retry delay: %d secs\n", |
62e76326 | 1067 | (int) pd->times.retry_delay); |
e13ee7ad | 1068 | storeAppendPrintf(e, "\tlast request response time: %d secs\n", |
62e76326 | 1069 | (int) pd->times.req_delay); |
e13ee7ad | 1070 | storeAppendPrintf(e, "\tlast request result: %s\n", |
62e76326 | 1071 | pd->req_result ? pd->req_result : "(none)"); |
e13ee7ad | 1072 | |
1073 | storeAppendPrintf(e, "\npeer digest traffic:\n"); | |
1074 | storeAppendPrintf(e, "\trequests sent: %d, volume: %d KB\n", | |
62e76326 | 1075 | pd->stats.sent.msgs, (int) pd->stats.sent.kbytes.kb); |
e13ee7ad | 1076 | storeAppendPrintf(e, "\treplies recv: %d, volume: %d KB\n", |
62e76326 | 1077 | pd->stats.recv.msgs, (int) pd->stats.recv.kbytes.kb); |
e13ee7ad | 1078 | |
1079 | storeAppendPrintf(e, "\npeer digest structure:\n"); | |
62e76326 | 1080 | |
e13ee7ad | 1081 | if (pd->cd) |
62e76326 | 1082 | cacheDigestReport(pd->cd, host, e); |
e13ee7ad | 1083 | else |
62e76326 | 1084 | storeAppendPrintf(e, "\tno in-memory copy\n"); |
e13ee7ad | 1085 | } |
1086 | ||
7f6eb0fe | 1087 | #endif |
f53969cc | 1088 |