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Commit | Line | Data |
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30a4f2a8 | 1 | /* |
77b1029d | 2 | * Copyright (C) 1996-2020 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. | |
019dd986 | 7 | */ |
090089c4 | 8 | |
bbc27441 AJ |
9 | /* DEBUG: section 15 Neighbor Routines */ |
10 | ||
582c2af2 | 11 | #include "squid.h" |
c0941a6a | 12 | #include "acl/FilledChecklist.h" |
65d448bc | 13 | #include "anyp/PortCfg.h" |
2fefc43c | 14 | #include "base/EnumIterator.h" |
b814e8d4 | 15 | #include "CacheDigest.h" |
a011edee | 16 | #include "CachePeer.h" |
55cbb02b | 17 | #include "comm/Connection.h" |
aed188fd | 18 | #include "comm/ConnOpener.h" |
a553a5a3 | 19 | #include "event.h" |
eb13c21e | 20 | #include "FwdState.h" |
582c2af2 | 21 | #include "globals.h" |
aa839030 | 22 | #include "htcp.h" |
528b2c61 | 23 | #include "HttpRequest.h" |
582c2af2 | 24 | #include "icmp/net_db.h" |
aa839030 | 25 | #include "ICP.h" |
f9b6ff6e | 26 | #include "int.h" |
582c2af2 | 27 | #include "ip/Address.h" |
b283ea3f | 28 | #include "ip/tools.h" |
714e68b7 | 29 | #include "ipcache.h" |
528b2c61 | 30 | #include "MemObject.h" |
582c2af2 | 31 | #include "mgr/Registration.h" |
afabcc13 | 32 | #include "multicast.h" |
f0ba2534 | 33 | #include "neighbors.h" |
602d9612 | 34 | #include "NeighborTypeDomainList.h" |
e8dca475 | 35 | #include "pconn.h" |
aa839030 | 36 | #include "PeerDigest.h" |
e8dca475 | 37 | #include "PeerPoolMgr.h" |
b24880fe | 38 | #include "PeerSelectState.h" |
f206b652 | 39 | #include "RequestFlags.h" |
4d5904f7 | 40 | #include "SquidConfig.h" |
a98bcbee | 41 | #include "SquidMath.h" |
985c86bc | 42 | #include "SquidTime.h" |
6ea5959e | 43 | #include "stat.h" |
aa839030 | 44 | #include "Store.h" |
fb548aaf | 45 | #include "store_key_md5.h" |
8d03bdb4 | 46 | #include "tools.h" |
090089c4 | 47 | |
429fdbec | 48 | /* count mcast group peers every 15 minutes */ |
49 | #define MCAST_COUNT_RATE 900 | |
50 | ||
cb365059 EB |
51 | bool peerAllowedToUse(const CachePeer *, PeerSelector *); |
52 | static int peerWouldBePinged(const CachePeer *, PeerSelector *); | |
a3c6762c FC |
53 | static void neighborRemove(CachePeer *); |
54 | static void neighborAlive(CachePeer *, const MemObject *, const icp_common_t *); | |
399cabec | 55 | #if USE_HTCP |
fad2588a | 56 | static void neighborAliveHtcp(CachePeer *, const MemObject *, const HtcpReplyData *); |
399cabec | 57 | #endif |
a3c6762c | 58 | static void neighborCountIgnored(CachePeer *); |
f5b8bbc4 | 59 | static void peerRefreshDNS(void *); |
b69f7771 | 60 | static IPH peerDNSConfigure; |
883b9a4d | 61 | static void peerProbeConnect(CachePeer *, const bool reprobeIfBusy = false); |
eb406bb7 | 62 | static CNCB peerProbeConnectDone; |
f5b8bbc4 | 63 | static void peerCountMcastPeersDone(void *data); |
64 | static void peerCountMcastPeersStart(void *data); | |
a3c6762c | 65 | static void peerCountMcastPeersSchedule(CachePeer * p, time_t when); |
b3264694 | 66 | static IRCB peerCountHandleIcpReply; |
62e76326 | 67 | |
b7ac5457 | 68 | static void neighborIgnoreNonPeer(const Ip::Address &, icp_opcode); |
ed7f5615 | 69 | static OBJH neighborDumpPeers; |
70 | static OBJH neighborDumpNonPeers; | |
a3c6762c | 71 | static void dump_peers(StoreEntry * sentry, CachePeer * peers); |
090089c4 | 72 | |
f45dd259 | 73 | static unsigned short echo_port; |
30a4f2a8 | 74 | |
c7a3724d | 75 | static int NLateReplies = 0; |
a3c6762c | 76 | static CachePeer *first_ping = NULL; |
28070024 | 77 | |
a2c963ae | 78 | const char * |
a3c6762c | 79 | neighborTypeStr(const CachePeer * p) |
69a71bd7 | 80 | { |
e102ebda | 81 | if (p->type == PEER_NONE) |
62e76326 | 82 | return "Non-Peer"; |
83 | ||
b69f7771 | 84 | if (p->type == PEER_SIBLING) |
62e76326 | 85 | return "Sibling"; |
86 | ||
b69f7771 | 87 | if (p->type == PEER_MULTICAST) |
62e76326 | 88 | return "Multicast Group"; |
89 | ||
69a71bd7 | 90 | return "Parent"; |
91 | } | |
92 | ||
a3c6762c | 93 | CachePeer * |
b7ac5457 | 94 | whichPeer(const Ip::Address &from) |
090089c4 | 95 | { |
22e4fa85 | 96 | int j; |
62e76326 | 97 | |
a3c6762c | 98 | CachePeer *p = NULL; |
cc192b50 | 99 | debugs(15, 3, "whichPeer: from " << from); |
62e76326 | 100 | |
26ac0430 | 101 | for (p = Config.peers; p; p = p->next) { |
5db6bf73 | 102 | for (j = 0; j < p->n_addresses; ++j) { |
4dd643d5 | 103 | if (from == p->addresses[j] && from.port() == p->icp.port) { |
62e76326 | 104 | return p; |
105 | } | |
106 | } | |
090089c4 | 107 | } |
62e76326 | 108 | |
4eda6afe | 109 | return NULL; |
090089c4 | 110 | } |
111 | ||
701a8572 | 112 | peer_t |
c8ab5ec6 | 113 | neighborType(const CachePeer * p, const AnyP::Uri &url) |
24a1003d | 114 | { |
62e76326 | 115 | |
5844d003 | 116 | const NeighborTypeDomainList *d = NULL; |
62e76326 | 117 | |
b69f7771 | 118 | for (d = p->typelist; d; d = d->next) { |
5c51bffb | 119 | if (0 == matchDomainName(url.host(), d->domain)) |
62e76326 | 120 | if (d->type != PEER_NONE) |
121 | return d->type; | |
24a1003d | 122 | } |
8a368316 AJ |
123 | #if PEER_MULTICAST_SIBLINGS |
124 | if (p->type == PEER_MULTICAST) | |
125 | if (p->options.mcast_siblings) | |
126 | return PEER_SIBLING; | |
127 | #endif | |
62e76326 | 128 | |
b69f7771 | 129 | return p->type; |
24a1003d | 130 | } |
131 | ||
2efeb0b7 AJ |
132 | /** |
133 | * \return Whether it is appropriate to fetch REQUEST from PEER. | |
7b3bd12c | 134 | */ |
2efeb0b7 | 135 | bool |
cb365059 | 136 | peerAllowedToUse(const CachePeer * p, PeerSelector * ps) |
090089c4 | 137 | { |
cb365059 EB |
138 | assert(ps); |
139 | HttpRequest *request = ps->request; | |
ce66013b | 140 | assert(request != NULL); |
62e76326 | 141 | |
5c51bffb | 142 | if (neighborType(p, request->url) == PEER_SIBLING) { |
8a368316 AJ |
143 | #if PEER_MULTICAST_SIBLINGS |
144 | if (p->type == PEER_MULTICAST && p->options.mcast_siblings && | |
450fe1cb | 145 | (request->flags.noCache || request->flags.refresh || request->flags.loopDetected || request->flags.needValidation)) |
5c51bffb | 146 | debugs(15, 2, "peerAllowedToUse(" << p->name << ", " << request->url.authority() << ") : multicast-siblings optimization match"); |
8a368316 | 147 | #endif |
450fe1cb | 148 | if (request->flags.noCache) |
2efeb0b7 | 149 | return false; |
62e76326 | 150 | |
45e5102d | 151 | if (request->flags.refresh) |
2efeb0b7 | 152 | return false; |
62e76326 | 153 | |
450fe1cb | 154 | if (request->flags.loopDetected) |
2efeb0b7 | 155 | return false; |
62e76326 | 156 | |
450fe1cb | 157 | if (request->flags.needValidation) |
2efeb0b7 | 158 | return false; |
9689d97c | 159 | } |
62e76326 | 160 | |
ad46590b | 161 | // CONNECT requests are proxy requests. Not to be forwarded to origin servers. |
a3c6762c | 162 | // Unless the destination port matches, in which case we MAY perform a 'DIRECT' to this CachePeer. |
d9a7bc71 | 163 | if (p->options.originserver && request->method == Http::METHOD_CONNECT && request->url.port() != p->http_port) |
2efeb0b7 | 164 | return false; |
ad46590b | 165 | |
505e35db | 166 | if (p->access == NULL) |
f1a5d071 | 167 | return true; |
62e76326 | 168 | |
c0941a6a | 169 | ACLFilledChecklist checklist(p->access, request, NULL); |
cb365059 | 170 | checklist.al = ps->al; |
82a9ea6c EB |
171 | if (ps->al && ps->al->reply) { |
172 | checklist.reply = ps->al->reply.getRaw(); | |
173 | HTTPMSGLOCK(checklist.reply); | |
174 | } | |
cb365059 | 175 | checklist.syncAle(request, nullptr); |
06bf5384 | 176 | return checklist.fastCheck().allowed(); |
090089c4 | 177 | } |
178 | ||
a3c6762c | 179 | /* Return TRUE if it is okay to send an ICP request to this CachePeer. */ |
62fd6124 | 180 | static int |
cb365059 | 181 | peerWouldBePinged(const CachePeer * p, PeerSelector * ps) |
62fd6124 | 182 | { |
cb365059 EB |
183 | assert(ps); |
184 | HttpRequest *request = ps->request; | |
185 | ||
6315602c | 186 | if (p->icp.port == 0) |
62e76326 | 187 | return 0; |
188 | ||
cd196bc8 | 189 | if (p->options.no_query) |
62e76326 | 190 | return 0; |
191 | ||
cd196bc8 | 192 | if (p->options.mcast_responder) |
62e76326 | 193 | return 0; |
194 | ||
83b381d5 | 195 | if (p->n_addresses == 0) |
62e76326 | 196 | return 0; |
197 | ||
6315602c | 198 | if (p->options.background_ping && (squid_curtime - p->stats.last_query < Config.backgroundPingRate)) |
62e76326 | 199 | return 0; |
200 | ||
62fd6124 | 201 | /* the case below seems strange, but can happen if the |
202 | * URL host is on the other side of a firewall */ | |
b69f7771 | 203 | if (p->type == PEER_SIBLING) |
45e5102d | 204 | if (!request->flags.hierarchical) |
62e76326 | 205 | return 0; |
206 | ||
cb365059 | 207 | if (!peerAllowedToUse(p, ps)) |
6315602c JGD |
208 | return 0; |
209 | ||
83b381d5 | 210 | /* Ping dead peers every timeout interval */ |
211 | if (squid_curtime - p->stats.last_query > Config.Timeout.deadPeer) | |
62e76326 | 212 | return 1; |
213 | ||
5537c535 | 214 | if (!neighborUp(p)) |
215 | return 0; | |
62e76326 | 216 | |
62fd6124 | 217 | return 1; |
218 | } | |
219 | ||
e8dca475 CT |
220 | bool |
221 | peerCanOpenMore(const CachePeer *p) | |
222 | { | |
223 | const int effectiveLimit = p->max_conn <= 0 ? Squid_MaxFD : p->max_conn; | |
224 | const int remaining = effectiveLimit - p->stats.conn_open; | |
225 | debugs(15, 7, remaining << '=' << effectiveLimit << '-' << p->stats.conn_open); | |
226 | return remaining > 0; | |
227 | } | |
228 | ||
229 | bool | |
230 | peerHasConnAvailable(const CachePeer *p) | |
231 | { | |
232 | // Standby connections can be used without opening new connections. | |
233 | const int standbys = p->standby.pool ? p->standby.pool->count() : 0; | |
234 | ||
235 | // XXX: Some idle pconns can be used without opening new connections. | |
236 | // Complication: Idle pconns cannot be reused for some requests. | |
237 | const int usableIdles = 0; | |
238 | ||
239 | const int available = standbys + usableIdles; | |
240 | debugs(15, 7, available << '=' << standbys << '+' << usableIdles); | |
241 | return available > 0; | |
242 | } | |
243 | ||
244 | void | |
245 | peerConnClosed(CachePeer *p) | |
246 | { | |
247 | --p->stats.conn_open; | |
248 | if (p->standby.waitingForClose && peerCanOpenMore(p)) { | |
249 | p->standby.waitingForClose = false; | |
250 | PeerPoolMgr::Checkpoint(p->standby.mgr, "conn closed"); | |
251 | } | |
252 | } | |
253 | ||
a3c6762c | 254 | /* Return TRUE if it is okay to send an HTTP request to this CachePeer. */ |
8ff4505b | 255 | int |
cb365059 | 256 | peerHTTPOkay(const CachePeer * p, PeerSelector * ps) |
62fd6124 | 257 | { |
e8dca475 CT |
258 | if (!peerCanOpenMore(p) && !peerHasConnAvailable(p)) |
259 | return 0; | |
6315602c | 260 | |
cb365059 | 261 | if (!peerAllowedToUse(p, ps)) |
62e76326 | 262 | return 0; |
263 | ||
b69f7771 | 264 | if (!neighborUp(p)) |
62e76326 | 265 | return 0; |
266 | ||
62fd6124 | 267 | return 1; |
268 | } | |
269 | ||
3c6e634f | 270 | int |
cb365059 | 271 | neighborsCount(PeerSelector *ps) |
090089c4 | 272 | { |
a3c6762c | 273 | CachePeer *p = NULL; |
090089c4 | 274 | int count = 0; |
62e76326 | 275 | |
40a1495e | 276 | for (p = Config.peers; p; p = p->next) |
cb365059 | 277 | if (peerWouldBePinged(p, ps)) |
5db6bf73 | 278 | ++count; |
62e76326 | 279 | |
bf8fe701 | 280 | debugs(15, 3, "neighborsCount: " << count); |
62e76326 | 281 | |
3c6e634f | 282 | return count; |
283 | } | |
090089c4 | 284 | |
a3c6762c | 285 | CachePeer * |
cb365059 | 286 | getFirstUpParent(PeerSelector *ps) |
090089c4 | 287 | { |
cb365059 EB |
288 | assert(ps); |
289 | HttpRequest *request = ps->request; | |
290 | ||
a3c6762c | 291 | CachePeer *p = NULL; |
62e76326 | 292 | |
40a1495e | 293 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 294 | if (!neighborUp(p)) |
295 | continue; | |
296 | ||
5c51bffb | 297 | if (neighborType(p, request->url) != PEER_PARENT) |
62e76326 | 298 | continue; |
299 | ||
cb365059 | 300 | if (!peerHTTPOkay(p, ps)) |
62e76326 | 301 | continue; |
302 | ||
303 | break; | |
090089c4 | 304 | } |
62e76326 | 305 | |
bf8fe701 | 306 | debugs(15, 3, "getFirstUpParent: returning " << (p ? p->host : "NULL")); |
b69f7771 | 307 | return p; |
090089c4 | 308 | } |
309 | ||
a3c6762c | 310 | CachePeer * |
cb365059 | 311 | getRoundRobinParent(PeerSelector *ps) |
48b38d01 | 312 | { |
cb365059 EB |
313 | assert(ps); |
314 | HttpRequest *request = ps->request; | |
315 | ||
a3c6762c FC |
316 | CachePeer *p; |
317 | CachePeer *q = NULL; | |
62e76326 | 318 | |
40a1495e | 319 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 320 | if (!p->options.roundrobin) |
321 | continue; | |
322 | ||
5c51bffb | 323 | if (neighborType(p, request->url) != PEER_PARENT) |
62e76326 | 324 | continue; |
325 | ||
cb365059 | 326 | if (!peerHTTPOkay(p, ps)) |
62e76326 | 327 | continue; |
328 | ||
1d0bef67 | 329 | if (p->weight == 0) |
0d5a2006 | 330 | continue; |
1d0bef67 AJ |
331 | |
332 | if (q) { | |
333 | if (p->weight == q->weight) { | |
334 | if (q->rr_count < p->rr_count) | |
335 | continue; | |
2d3d0b4e | 336 | } else if ( ((double) q->rr_count / q->weight) < ((double) p->rr_count / p->weight)) { |
1d0bef67 AJ |
337 | continue; |
338 | } | |
0d5a2006 | 339 | } |
62e76326 | 340 | |
341 | q = p; | |
48b38d01 | 342 | } |
62e76326 | 343 | |
b69f7771 | 344 | if (q) |
5db6bf73 | 345 | ++ q->rr_count; |
62e76326 | 346 | |
1d0bef67 | 347 | debugs(15, 3, HERE << "returning " << (q ? q->host : "NULL")); |
62e76326 | 348 | |
b69f7771 | 349 | return q; |
48b38d01 | 350 | } |
351 | ||
a3c6762c | 352 | CachePeer * |
cb365059 | 353 | getWeightedRoundRobinParent(PeerSelector *ps) |
d1b63fc8 | 354 | { |
cb365059 EB |
355 | assert(ps); |
356 | HttpRequest *request = ps->request; | |
357 | ||
a3c6762c FC |
358 | CachePeer *p; |
359 | CachePeer *q = NULL; | |
d1b63fc8 | 360 | int weighted_rtt; |
62e76326 | 361 | |
d1b63fc8 | 362 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 363 | if (!p->options.weighted_roundrobin) |
364 | continue; | |
365 | ||
5c51bffb | 366 | if (neighborType(p, request->url) != PEER_PARENT) |
62e76326 | 367 | continue; |
368 | ||
cb365059 | 369 | if (!peerHTTPOkay(p, ps)) |
62e76326 | 370 | continue; |
371 | ||
372 | if (q && q->rr_count < p->rr_count) | |
373 | continue; | |
374 | ||
375 | q = p; | |
d1b63fc8 | 376 | } |
62e76326 | 377 | |
d1b63fc8 | 378 | if (q && q->rr_count > 1000000) |
62e76326 | 379 | for (p = Config.peers; p; p = p->next) { |
380 | if (!p->options.weighted_roundrobin) | |
381 | continue; | |
382 | ||
5c51bffb | 383 | if (neighborType(p, request->url) != PEER_PARENT) |
62e76326 | 384 | continue; |
385 | ||
386 | p->rr_count = 0; | |
387 | } | |
388 | ||
d1b63fc8 | 389 | if (q) { |
62e76326 | 390 | weighted_rtt = (q->stats.rtt - q->basetime) / q->weight; |
d1b63fc8 | 391 | |
62e76326 | 392 | if (weighted_rtt < 1) |
393 | weighted_rtt = 1; | |
394 | ||
395 | q->rr_count += weighted_rtt; | |
396 | ||
4a7a3d56 | 397 | debugs(15, 3, "getWeightedRoundRobinParent: weighted_rtt " << weighted_rtt); |
d1b63fc8 | 398 | } |
62e76326 | 399 | |
bf8fe701 | 400 | debugs(15, 3, "getWeightedRoundRobinParent: returning " << (q ? q->host : "NULL")); |
d1b63fc8 | 401 | return q; |
402 | } | |
403 | ||
32a47e3e AJ |
404 | /** |
405 | * This gets called every 5 minutes to clear the round-robin counter. | |
406 | * The exact timing is an arbitrary default, set on estimate timing of a | |
407 | * large number of requests in a high-performance environment during the | |
408 | * period. The larger the number of requests between cycled resets the | |
409 | * more balanced the operations. | |
410 | * | |
f53969cc | 411 | \param data unused. |
32a47e3e AJ |
412 | \todo Make the reset timing a selectable parameter in squid.conf |
413 | */ | |
26ac0430 | 414 | static void |
32a47e3e AJ |
415 | peerClearRRLoop(void *data) |
416 | { | |
417 | peerClearRR(); | |
418 | eventAdd("peerClearRR", peerClearRRLoop, data, 5 * 60.0, 0); | |
419 | } | |
420 | ||
421 | /** | |
a3c6762c | 422 | * This gets called on startup and restart to kick off the CachePeer round-robin |
32a47e3e AJ |
423 | * maintenance event. It ensures that no matter how many times its called |
424 | * no more than one event is scheduled. | |
425 | */ | |
82056f1e | 426 | void |
32a47e3e | 427 | peerClearRRStart(void) |
82056f1e | 428 | { |
7a3f0061 | 429 | static bool event_added = false; |
32a47e3e AJ |
430 | if (!event_added) { |
431 | peerClearRRLoop(NULL); | |
7a3f0061 | 432 | event_added=true; |
32a47e3e AJ |
433 | } |
434 | } | |
62e76326 | 435 | |
32a47e3e AJ |
436 | /** |
437 | * Called whenever the round-robin counters need to be reset to a sane state. | |
438 | * So far those times are: | |
d85b8894 | 439 | * - On startup and reconfigure - to set the counters to sane initial settings. |
a3c6762c | 440 | * - When a CachePeer has revived from dead, to prevent the revived CachePeer being |
32a47e3e AJ |
441 | * flooded with requests which it has 'missed' during the down period. |
442 | */ | |
443 | void | |
444 | peerClearRR() | |
445 | { | |
a3c6762c | 446 | CachePeer *p = NULL; |
32a47e3e | 447 | for (p = Config.peers; p; p = p->next) { |
2da06da0 | 448 | p->rr_count = 1; |
32a47e3e AJ |
449 | } |
450 | } | |
62e76326 | 451 | |
32a47e3e | 452 | /** |
a3c6762c | 453 | * Perform all actions when a CachePeer is detected revived. |
32a47e3e AJ |
454 | */ |
455 | void | |
a3c6762c | 456 | peerAlive(CachePeer *p) |
32a47e3e AJ |
457 | { |
458 | if (p->stats.logged_state == PEER_DEAD && p->tcp_up) { | |
e0236918 | 459 | debugs(15, DBG_IMPORTANT, "Detected REVIVED " << neighborTypeStr(p) << ": " << p->name); |
32a47e3e AJ |
460 | p->stats.logged_state = PEER_ALIVE; |
461 | peerClearRR(); | |
e8dca475 CT |
462 | if (p->standby.mgr.valid()) |
463 | PeerPoolMgr::Checkpoint(p->standby.mgr, "revived peer"); | |
32a47e3e | 464 | } |
62e76326 | 465 | |
32a47e3e AJ |
466 | p->stats.last_reply = squid_curtime; |
467 | p->stats.probe_start = 0; | |
82056f1e | 468 | } |
469 | ||
a3c6762c | 470 | CachePeer * |
cb365059 | 471 | getDefaultParent(PeerSelector *ps) |
5269d0bd | 472 | { |
cb365059 EB |
473 | assert(ps); |
474 | HttpRequest *request = ps->request; | |
475 | ||
a3c6762c | 476 | CachePeer *p = NULL; |
62e76326 | 477 | |
40a1495e | 478 | for (p = Config.peers; p; p = p->next) { |
5c51bffb | 479 | if (neighborType(p, request->url) != PEER_PARENT) |
62e76326 | 480 | continue; |
481 | ||
482 | if (!p->options.default_parent) | |
483 | continue; | |
484 | ||
cb365059 | 485 | if (!peerHTTPOkay(p, ps)) |
62e76326 | 486 | continue; |
487 | ||
bf8fe701 | 488 | debugs(15, 3, "getDefaultParent: returning " << p->host); |
62e76326 | 489 | |
490 | return p; | |
5269d0bd | 491 | } |
62e76326 | 492 | |
bf8fe701 | 493 | debugs(15, 3, "getDefaultParent: returning NULL"); |
5269d0bd | 494 | return NULL; |
495 | } | |
496 | ||
a3c6762c FC |
497 | CachePeer * |
498 | getNextPeer(CachePeer * p) | |
090089c4 | 499 | { |
b69f7771 | 500 | return p->next; |
090089c4 | 501 | } |
502 | ||
a3c6762c | 503 | CachePeer * |
deb79f06 | 504 | getFirstPeer(void) |
090089c4 | 505 | { |
40a1495e | 506 | return Config.peers; |
090089c4 | 507 | } |
508 | ||
b8d8561b | 509 | static void |
a3c6762c | 510 | neighborRemove(CachePeer * target) |
30a4f2a8 | 511 | { |
a3c6762c FC |
512 | CachePeer *p = NULL; |
513 | CachePeer **P = NULL; | |
40a1495e | 514 | p = Config.peers; |
515 | P = &Config.peers; | |
62e76326 | 516 | |
b69f7771 | 517 | while (p) { |
62e76326 | 518 | if (target == p) |
519 | break; | |
520 | ||
521 | P = &p->next; | |
522 | ||
523 | p = p->next; | |
b69f7771 | 524 | } |
62e76326 | 525 | |
b69f7771 | 526 | if (p) { |
62e76326 | 527 | *P = p->next; |
719815a0 AJ |
528 | p->next = NULL; |
529 | delete p; | |
5e263176 | 530 | --Config.npeers; |
4d64d74a | 531 | } |
62e76326 | 532 | |
40a1495e | 533 | first_ping = Config.peers; |
4d64d74a | 534 | } |
535 | ||
5f5e883f FC |
536 | static void |
537 | neighborsRegisterWithCacheManager() | |
538 | { | |
8822ebee | 539 | Mgr::RegisterAction("server_list", |
d9fc6862 A |
540 | "Peer Cache Statistics", |
541 | neighborDumpPeers, 0, 1); | |
5f5e883f | 542 | |
e0d28505 | 543 | if (Comm::IsConnOpen(icpIncomingConn)) { |
8822ebee | 544 | Mgr::RegisterAction("non_peers", |
d9fc6862 A |
545 | "List of Unknown sites sending ICP messages", |
546 | neighborDumpNonPeers, 0, 1); | |
5f5e883f FC |
547 | } |
548 | } | |
549 | ||
b8d8561b | 550 | void |
a86029b9 | 551 | neighbors_init(void) |
090089c4 | 552 | { |
30a4f2a8 | 553 | struct servent *sep = NULL; |
b263bd3f | 554 | const char *me = getMyHostname(); |
a3c6762c FC |
555 | CachePeer *thisPeer = NULL; |
556 | CachePeer *next = NULL; | |
62e76326 | 557 | |
6fdc2d18 FC |
558 | neighborsRegisterWithCacheManager(); |
559 | ||
e0d28505 | 560 | if (Comm::IsConnOpen(icpIncomingConn)) { |
62e76326 | 561 | |
562 | for (thisPeer = Config.peers; thisPeer; thisPeer = next) { | |
62e76326 | 563 | next = thisPeer->next; |
564 | ||
565 | if (0 != strcmp(thisPeer->host, me)) | |
566 | continue; | |
567 | ||
fa720bfb | 568 | for (AnyP::PortCfgPointer s = HttpPortList; s != NULL; s = s->next) { |
4dd643d5 | 569 | if (thisPeer->http_port != s->s.port()) |
62e76326 | 570 | continue; |
571 | ||
ccfbe8f4 AR |
572 | debugs(15, DBG_IMPORTANT, "WARNING: Peer looks like this host." << |
573 | Debug::Extra << "Ignoring " << | |
bf8fe701 | 574 | neighborTypeStr(thisPeer) << " " << thisPeer->host << |
575 | "/" << thisPeer->http_port << "/" << | |
576 | thisPeer->icp.port); | |
62e76326 | 577 | |
62e76326 | 578 | neighborRemove(thisPeer); |
579 | } | |
580 | } | |
b263bd3f | 581 | } |
62e76326 | 582 | |
5999b776 | 583 | peerRefreshDNS((void *) 1); |
62e76326 | 584 | |
9ca56f05 | 585 | sep = getservbyname("echo", "udp"); |
f45dd259 | 586 | echo_port = sep ? ntohs((unsigned short) sep->s_port) : 7; |
62e76326 | 587 | |
c68e4e90 | 588 | first_ping = Config.peers; |
62ee09ca | 589 | } |
590 | ||
b8d8561b | 591 | int |
190154cf | 592 | neighborsUdpPing(HttpRequest * request, |
62e76326 | 593 | StoreEntry * entry, |
594 | IRCB * callback, | |
cb365059 | 595 | PeerSelector *ps, |
62e76326 | 596 | int *exprep, |
597 | int *timeout) | |
090089c4 | 598 | { |
3900307b | 599 | const char *url = entry->url(); |
b6c0e933 | 600 | MemObject *mem = entry->mem_obj; |
a3c6762c | 601 | CachePeer *p = NULL; |
090089c4 | 602 | int i; |
1061b406 | 603 | int reqnum = 0; |
6d2296d4 | 604 | int flags; |
429fdbec | 605 | int queries_sent = 0; |
0a0bf5db | 606 | int peers_pinged = 0; |
a8c926ff | 607 | int parent_timeout = 0, parent_exprep = 0; |
608 | int sibling_timeout = 0, sibling_exprep = 0; | |
1bf2cd49 | 609 | int mcast_timeout = 0, mcast_exprep = 0; |
090089c4 | 610 | |
40a1495e | 611 | if (Config.peers == NULL) |
62e76326 | 612 | return 0; |
613 | ||
4310f8b0 | 614 | assert(!entry->hasDisk()); |
62e76326 | 615 | |
b6c0e933 | 616 | mem->start_ping = current_time; |
62e76326 | 617 | |
b4e7f82d | 618 | mem->ping_reply_callback = callback; |
62e76326 | 619 | |
cb365059 | 620 | mem->ircb_data = ps; |
62e76326 | 621 | |
332dafa2 | 622 | reqnum = icpSetCacheKey((const cache_key *)entry->key); |
62e76326 | 623 | |
40a1495e | 624 | for (i = 0, p = first_ping; i++ < Config.npeers; p = p->next) { |
62e76326 | 625 | if (p == NULL) |
626 | p = Config.peers; | |
627 | ||
bf8fe701 | 628 | debugs(15, 5, "neighborsUdpPing: Peer " << p->host); |
62e76326 | 629 | |
cb365059 | 630 | if (!peerWouldBePinged(p, ps)) |
f53969cc | 631 | continue; /* next CachePeer */ |
62e76326 | 632 | |
5db6bf73 | 633 | ++peers_pinged; |
62e76326 | 634 | |
bf8fe701 | 635 | debugs(15, 4, "neighborsUdpPing: pinging peer " << p->host << " for '" << url << "'"); |
62e76326 | 636 | |
bf8fe701 | 637 | debugs(15, 3, "neighborsUdpPing: key = '" << entry->getMD5Text() << "'"); |
62e76326 | 638 | |
bf8fe701 | 639 | debugs(15, 3, "neighborsUdpPing: reqnum = " << reqnum); |
090089c4 | 640 | |
dc9d133b | 641 | #if USE_HTCP |
4f4fa815 | 642 | if (p->options.htcp && !p->options.htcp_only_clr) { |
bebf08ff AJ |
643 | if (Config.Port.htcp <= 0) { |
644 | debugs(15, DBG_CRITICAL, "HTCP is disabled! Cannot send HTCP request to peer."); | |
645 | continue; | |
646 | } | |
647 | ||
bf8fe701 | 648 | debugs(15, 3, "neighborsUdpPing: sending HTCP query"); |
65d448bc AJ |
649 | if (htcpQuery(entry, request, p) <= 0) |
650 | continue; // unable to send. | |
62e76326 | 651 | } else |
dc9d133b | 652 | #endif |
bebf08ff | 653 | { |
e0d28505 | 654 | if (Config.Port.icp <= 0 || !Comm::IsConnOpen(icpOutgoingConn)) { |
bebf08ff AJ |
655 | debugs(15, DBG_CRITICAL, "ICP is disabled! Cannot send ICP request to peer."); |
656 | continue; | |
62e76326 | 657 | } else { |
62e76326 | 658 | |
bebf08ff | 659 | if (p->type == PEER_MULTICAST) |
e0d28505 | 660 | mcastSetTtl(icpOutgoingConn->fd, p->mcast.ttl); |
bebf08ff AJ |
661 | |
662 | if (p->icp.port == echo_port) { | |
663 | debugs(15, 4, "neighborsUdpPing: Looks like a dumb cache, send DECHO ping"); | |
d2a6dcba EB |
664 | // TODO: Get ALE from callback_data if possible. |
665 | icpCreateAndSend(ICP_DECHO, 0, url, reqnum, 0, | |
666 | icpOutgoingConn->fd, p->in_addr, nullptr); | |
bebf08ff AJ |
667 | } else { |
668 | flags = 0; | |
62e76326 | 669 | |
bebf08ff AJ |
670 | if (Config.onoff.query_icmp) |
671 | if (p->icp.version == ICP_VERSION_2) | |
672 | flags |= ICP_FLAG_SRC_RTT; | |
62e76326 | 673 | |
d2a6dcba EB |
674 | // TODO: Get ALE from callback_data if possible. |
675 | icpCreateAndSend(ICP_QUERY, flags, url, reqnum, 0, | |
676 | icpOutgoingConn->fd, p->in_addr, nullptr); | |
bebf08ff | 677 | } |
62e76326 | 678 | } |
bebf08ff | 679 | } |
62e76326 | 680 | |
5db6bf73 | 681 | ++queries_sent; |
62e76326 | 682 | |
5db6bf73 | 683 | ++ p->stats.pings_sent; |
62e76326 | 684 | |
685 | if (p->type == PEER_MULTICAST) { | |
1bf2cd49 | 686 | mcast_exprep += p->mcast.n_replies_expected; |
687 | mcast_timeout += (p->stats.rtt * p->mcast.n_replies_expected); | |
62e76326 | 688 | } else if (neighborUp(p)) { |
689 | /* its alive, expect a reply from it */ | |
690 | ||
5c51bffb | 691 | if (neighborType(p, request->url) == PEER_PARENT) { |
5db6bf73 | 692 | ++parent_exprep; |
62e76326 | 693 | parent_timeout += p->stats.rtt; |
694 | } else { | |
5db6bf73 | 695 | ++sibling_exprep; |
62e76326 | 696 | sibling_timeout += p->stats.rtt; |
697 | } | |
698 | } else { | |
699 | /* Neighbor is dead; ping it anyway, but don't expect a reply */ | |
700 | /* log it once at the threshold */ | |
701 | ||
702 | if (p->stats.logged_state == PEER_ALIVE) { | |
e0236918 | 703 | debugs(15, DBG_IMPORTANT, "Detected DEAD " << neighborTypeStr(p) << ": " << p->name); |
62e76326 | 704 | p->stats.logged_state = PEER_DEAD; |
705 | } | |
706 | } | |
707 | ||
708 | p->stats.last_query = squid_curtime; | |
709 | ||
67c8308c | 710 | /* |
a3c6762c FC |
711 | * keep probe_start == 0 for a multicast CachePeer, |
712 | * so neighborUp() never says this CachePeer is dead. | |
67c8308c | 713 | */ |
714 | ||
715 | if ((p->type != PEER_MULTICAST) && (p->stats.probe_start == 0)) | |
62e76326 | 716 | p->stats.probe_start = squid_curtime; |
090089c4 | 717 | } |
62e76326 | 718 | |
40a1495e | 719 | if ((first_ping = first_ping->next) == NULL) |
62e76326 | 720 | first_ping = Config.peers; |
090089c4 | 721 | |
a8c926ff | 722 | /* |
723 | * How many replies to expect? | |
724 | */ | |
1bf2cd49 | 725 | *exprep = parent_exprep + sibling_exprep + mcast_exprep; |
a8c926ff | 726 | |
52040193 | 727 | /* |
465dc415 | 728 | * If there is a configured timeout, use it |
52040193 | 729 | */ |
465dc415 | 730 | if (Config.Timeout.icp_query) |
62e76326 | 731 | *timeout = Config.Timeout.icp_query; |
28993292 | 732 | else { |
62e76326 | 733 | if (*exprep > 0) { |
734 | if (parent_exprep) | |
735 | *timeout = 2 * parent_timeout / parent_exprep; | |
1bf2cd49 | 736 | else if (mcast_exprep) |
737 | *timeout = 2 * mcast_timeout / mcast_exprep; | |
62e76326 | 738 | else |
739 | *timeout = 2 * sibling_timeout / sibling_exprep; | |
740 | } else | |
f53969cc | 741 | *timeout = 2000; /* 2 seconds */ |
62e76326 | 742 | |
743 | if (Config.Timeout.icp_query_max) | |
744 | if (*timeout > Config.Timeout.icp_query_max) | |
745 | *timeout = Config.Timeout.icp_query_max; | |
746 | ||
747 | if (*timeout < Config.Timeout.icp_query_min) | |
748 | *timeout = Config.Timeout.icp_query_min; | |
28993292 | 749 | } |
62e76326 | 750 | |
0a0bf5db | 751 | return peers_pinged; |
090089c4 | 752 | } |
753 | ||
a3c6762c | 754 | /* lookup the digest of a given CachePeer */ |
26b164ac | 755 | lookup_t |
cb365059 | 756 | peerDigestLookup(CachePeer * p, PeerSelector * ps) |
26b164ac | 757 | { |
6cfa8966 | 758 | #if USE_CACHE_DIGESTS |
cb365059 EB |
759 | assert(ps); |
760 | HttpRequest *request = ps->request; | |
f66a9ef4 | 761 | const cache_key *key = request ? storeKeyPublicByRequest(request) : NULL; |
26b164ac | 762 | assert(p); |
0c511722 | 763 | assert(request); |
bf8fe701 | 764 | debugs(15, 5, "peerDigestLookup: peer " << p->host); |
4b4cd312 | 765 | /* does the peeer have a valid digest? */ |
62e76326 | 766 | |
e13ee7ad | 767 | if (!p->digest) { |
bf8fe701 | 768 | debugs(15, 5, "peerDigestLookup: gone!"); |
62e76326 | 769 | return LOOKUP_NONE; |
cb365059 | 770 | } else if (!peerHTTPOkay(p, ps)) { |
bf8fe701 | 771 | debugs(15, 5, "peerDigestLookup: !peerHTTPOkay"); |
6755df2e | 772 | return LOOKUP_NONE; |
e13ee7ad | 773 | } else if (!p->digest->flags.needed) { |
bf8fe701 | 774 | debugs(15, 5, "peerDigestLookup: note need"); |
62e76326 | 775 | peerDigestNeeded(p->digest); |
776 | return LOOKUP_NONE; | |
4ed0e075 | 777 | } else if (!p->digest->flags.usable) { |
bf8fe701 | 778 | debugs(15, 5, "peerDigestLookup: !ready && " << (p->digest->flags.requested ? "" : "!") << "requested"); |
62e76326 | 779 | return LOOKUP_NONE; |
26b164ac | 780 | } |
62e76326 | 781 | |
bf8fe701 | 782 | debugs(15, 5, "peerDigestLookup: OK to lookup peer " << p->host); |
e13ee7ad | 783 | assert(p->digest->cd); |
26b164ac | 784 | /* does digest predict a hit? */ |
62e76326 | 785 | |
6fc4e508 | 786 | if (!p->digest->cd->contains(key)) |
62e76326 | 787 | return LOOKUP_MISS; |
788 | ||
bf8fe701 | 789 | debugs(15, 5, "peerDigestLookup: peer " << p->host << " says HIT!"); |
62e76326 | 790 | |
26b164ac | 791 | return LOOKUP_HIT; |
62e76326 | 792 | |
26b164ac | 793 | #endif |
62e76326 | 794 | |
26b164ac | 795 | return LOOKUP_NONE; |
796 | } | |
797 | ||
a3c6762c FC |
798 | /* select best CachePeer based on cache digests */ |
799 | CachePeer * | |
cb365059 | 800 | neighborsDigestSelect(PeerSelector *ps) |
a54d3f8e | 801 | { |
a3c6762c | 802 | CachePeer *best_p = NULL; |
6cfa8966 | 803 | #if USE_CACHE_DIGESTS |
cb365059 EB |
804 | assert(ps); |
805 | HttpRequest *request = ps->request; | |
62e76326 | 806 | |
a54d3f8e | 807 | int best_rtt = 0; |
808 | int choice_count = 0; | |
809 | int ichoice_count = 0; | |
a3c6762c | 810 | CachePeer *p; |
a54d3f8e | 811 | int p_rtt; |
812 | int i; | |
62e76326 | 813 | |
45e5102d | 814 | if (!request->flags.hierarchical) |
62e76326 | 815 | return NULL; |
816 | ||
e91e2a72 | 817 | storeKeyPublicByRequest(request); |
62e76326 | 818 | |
a54d3f8e | 819 | for (i = 0, p = first_ping; i++ < Config.npeers; p = p->next) { |
62e76326 | 820 | lookup_t lookup; |
821 | ||
822 | if (!p) | |
823 | p = Config.peers; | |
824 | ||
825 | if (i == 1) | |
826 | first_ping = p; | |
827 | ||
cb365059 | 828 | lookup = peerDigestLookup(p, ps); |
62e76326 | 829 | |
830 | if (lookup == LOOKUP_NONE) | |
831 | continue; | |
832 | ||
5db6bf73 | 833 | ++choice_count; |
62e76326 | 834 | |
835 | if (lookup == LOOKUP_MISS) | |
836 | continue; | |
837 | ||
838 | p_rtt = netdbHostRtt(p->host); | |
839 | ||
bf8fe701 | 840 | debugs(15, 5, "neighborsDigestSelect: peer " << p->host << " rtt: " << p_rtt); |
62e76326 | 841 | |
a3c6762c | 842 | /* is this CachePeer better than others in terms of rtt ? */ |
62e76326 | 843 | if (!best_p || (p_rtt && p_rtt < best_rtt)) { |
844 | best_p = p; | |
845 | best_rtt = p_rtt; | |
846 | ||
f53969cc | 847 | if (p_rtt) /* informative choice (aka educated guess) */ |
5db6bf73 | 848 | ++ichoice_count; |
62e76326 | 849 | |
bf8fe701 | 850 | debugs(15, 4, "neighborsDigestSelect: peer " << p->host << " leads with rtt " << best_rtt); |
62e76326 | 851 | } |
a54d3f8e | 852 | } |
62e76326 | 853 | |
bf8fe701 | 854 | debugs(15, 4, "neighborsDigestSelect: choices: " << choice_count << " (" << ichoice_count << ")"); |
26b164ac | 855 | peerNoteDigestLookup(request, best_p, |
62e76326 | 856 | best_p ? LOOKUP_HIT : (choice_count ? LOOKUP_MISS : LOOKUP_NONE)); |
a54d3f8e | 857 | request->hier.n_choices = choice_count; |
858 | request->hier.n_ichoices = ichoice_count; | |
859 | #endif | |
62e76326 | 860 | |
a54d3f8e | 861 | return best_p; |
862 | } | |
863 | ||
26b164ac | 864 | void |
a3c6762c | 865 | peerNoteDigestLookup(HttpRequest * request, CachePeer * p, lookup_t lookup) |
26b164ac | 866 | { |
6cfa8966 | 867 | #if USE_CACHE_DIGESTS |
26b164ac | 868 | if (p) |
0a84e4fb | 869 | strncpy(request->hier.cd_host, p->host, sizeof(request->hier.cd_host)-1); |
26b164ac | 870 | else |
62e76326 | 871 | *request->hier.cd_host = '\0'; |
872 | ||
26b164ac | 873 | request->hier.cd_lookup = lookup; |
4b981814 | 874 | debugs(15, 4, "peerNoteDigestLookup: peer " << (p? p->host : "<none>") << ", lookup: " << lookup_t_str[lookup] ); |
26b164ac | 875 | #endif |
876 | } | |
877 | ||
d73844ca | 878 | static void |
ced8def3 | 879 | neighborAlive(CachePeer * p, const MemObject *, const icp_common_t * header) |
4eda6afe | 880 | { |
32a47e3e | 881 | peerAlive(p); |
5db6bf73 | 882 | ++ p->stats.pings_acked; |
62e76326 | 883 | |
27cd7235 | 884 | if ((icp_opcode) header->opcode <= ICP_END) |
5db6bf73 | 885 | ++ p->icp.counts[header->opcode]; |
62e76326 | 886 | |
44f2f2e4 | 887 | p->icp.version = (int) header->version; |
888 | } | |
889 | ||
890 | static void | |
a3c6762c | 891 | neighborUpdateRtt(CachePeer * p, MemObject * mem) |
44f2f2e4 | 892 | { |
d1b63fc8 | 893 | int rtt, rtt_av_factor; |
62e76326 | 894 | |
d2cd6935 | 895 | if (!mem) |
62e76326 | 896 | return; |
897 | ||
44f2f2e4 | 898 | if (!mem->start_ping.tv_sec) |
62e76326 | 899 | return; |
900 | ||
44f2f2e4 | 901 | rtt = tvSubMsec(mem->start_ping, current_time); |
62e76326 | 902 | |
1b6ef2d2 | 903 | if (rtt < 1 || rtt > 10000) |
62e76326 | 904 | return; |
905 | ||
d1b63fc8 | 906 | rtt_av_factor = RTT_AV_FACTOR; |
62e76326 | 907 | |
d1b63fc8 | 908 | if (p->options.weighted_roundrobin) |
62e76326 | 909 | rtt_av_factor = RTT_BACKGROUND_AV_FACTOR; |
910 | ||
a98bcbee | 911 | p->stats.rtt = Math::intAverage(p->stats.rtt, rtt, p->stats.pings_acked, rtt_av_factor); |
4eda6afe | 912 | } |
090089c4 | 913 | |
399cabec | 914 | #if USE_HTCP |
915 | static void | |
ced8def3 | 916 | neighborAliveHtcp(CachePeer * p, const MemObject *, const HtcpReplyData * htcp) |
399cabec | 917 | { |
32a47e3e | 918 | peerAlive(p); |
5db6bf73 FC |
919 | ++ p->stats.pings_acked; |
920 | ++ p->htcp.counts[htcp->hit ? 1 : 0]; | |
44f2f2e4 | 921 | p->htcp.version = htcp->version; |
399cabec | 922 | } |
62e76326 | 923 | |
399cabec | 924 | #endif |
925 | ||
38792624 | 926 | static void |
a3c6762c | 927 | neighborCountIgnored(CachePeer * p) |
a7e59001 | 928 | { |
b69f7771 | 929 | if (p == NULL) |
62e76326 | 930 | return; |
931 | ||
5db6bf73 | 932 | ++ p->stats.ignored_replies; |
62e76326 | 933 | |
5db6bf73 | 934 | ++NLateReplies; |
a7e59001 | 935 | } |
936 | ||
a3c6762c | 937 | static CachePeer *non_peers = NULL; |
e102ebda | 938 | |
939 | static void | |
b7ac5457 | 940 | neighborIgnoreNonPeer(const Ip::Address &from, icp_opcode opcode) |
e102ebda | 941 | { |
a3c6762c | 942 | CachePeer *np; |
62e76326 | 943 | |
26ac0430 | 944 | for (np = non_peers; np; np = np->next) { |
cc192b50 | 945 | if (np->in_addr != from) |
62e76326 | 946 | continue; |
947 | ||
4dd643d5 | 948 | if (np->in_addr.port() != from.port()) |
62e76326 | 949 | continue; |
950 | ||
951 | break; | |
e102ebda | 952 | } |
62e76326 | 953 | |
26ac0430 | 954 | if (np == NULL) { |
719815a0 | 955 | np = new CachePeer; |
cc192b50 | 956 | np->in_addr = from; |
4dd643d5 | 957 | np->icp.port = from.port(); |
62e76326 | 958 | np->type = PEER_NONE; |
cc192b50 | 959 | np->host = new char[MAX_IPSTRLEN]; |
4dd643d5 | 960 | from.toStr(np->host,MAX_IPSTRLEN); |
62e76326 | 961 | np->next = non_peers; |
962 | non_peers = np; | |
e102ebda | 963 | } |
62e76326 | 964 | |
5db6bf73 | 965 | ++ np->icp.counts[opcode]; |
62e76326 | 966 | |
e4cc2fdf | 967 | if (isPowTen(++np->stats.ignored_replies)) |
e0236918 | 968 | debugs(15, DBG_IMPORTANT, "WARNING: Ignored " << np->stats.ignored_replies << " replies from non-peer " << np->host); |
e102ebda | 969 | } |
970 | ||
429fdbec | 971 | /* ignoreMulticastReply |
26ac0430 | 972 | * |
d6827718 | 973 | * * We want to ignore replies from multicast peers if the |
a3c6762c | 974 | * * cache_host_domain rules would normally prevent the CachePeer |
d6827718 | 975 | * * from being used |
429fdbec | 976 | */ |
977 | static int | |
cb365059 | 978 | ignoreMulticastReply(CachePeer * p, PeerSelector * ps) |
429fdbec | 979 | { |
b69f7771 | 980 | if (p == NULL) |
62e76326 | 981 | return 0; |
982 | ||
cd196bc8 | 983 | if (!p->options.mcast_responder) |
62e76326 | 984 | return 0; |
985 | ||
cb365059 | 986 | if (peerHTTPOkay(p, ps)) |
62e76326 | 987 | return 0; |
988 | ||
429fdbec | 989 | return 1; |
990 | } | |
991 | ||
4b981814 AJ |
992 | /** |
993 | * I should attach these records to the entry. We take the first | |
429fdbec | 994 | * hit we get our wait until everyone misses. The timeout handler |
995 | * call needs to nip this shopping list or call one of the misses. | |
26ac0430 | 996 | * |
429fdbec | 997 | * If a hit process is already started, then sobeit |
998 | */ | |
b8d8561b | 999 | void |
b7ac5457 | 1000 | neighborsUdpAck(const cache_key * key, icp_common_t * header, const Ip::Address &from) |
090089c4 | 1001 | { |
a3c6762c | 1002 | CachePeer *p = NULL; |
5ad33356 | 1003 | StoreEntry *entry; |
1004 | MemObject *mem = NULL; | |
b6c0e933 | 1005 | peer_t ntype = PEER_NONE; |
a7e59001 | 1006 | icp_opcode opcode = (icp_opcode) header->opcode; |
090089c4 | 1007 | |
4a7a3d56 | 1008 | debugs(15, 6, "neighborsUdpAck: opcode " << opcode << " '" << storeKeyText(key) << "'"); |
62e76326 | 1009 | |
80d0fe08 | 1010 | if ((entry = Store::Root().findCallbackXXX(key))) |
62e76326 | 1011 | mem = entry->mem_obj; |
1012 | ||
b69f7771 | 1013 | if ((p = whichPeer(from))) |
62e76326 | 1014 | neighborAlive(p, mem, header); |
1015 | ||
27cd7235 | 1016 | if (opcode > ICP_END) |
62e76326 | 1017 | return; |
1018 | ||
4b981814 | 1019 | const char *opcode_d = icp_opcode_str[opcode]; |
62e76326 | 1020 | |
41587298 | 1021 | if (p) |
62e76326 | 1022 | neighborUpdateRtt(p, mem); |
1023 | ||
5ad33356 | 1024 | /* Does the entry exist? */ |
26ac0430 | 1025 | if (NULL == entry) { |
bf8fe701 | 1026 | debugs(12, 3, "neighborsUdpAck: Cache key '" << storeKeyText(key) << "' not found"); |
62e76326 | 1027 | neighborCountIgnored(p); |
1028 | return; | |
5ad33356 | 1029 | } |
62e76326 | 1030 | |
2d1c6a4f | 1031 | /* check if someone is already fetching it */ |
26ac0430 | 1032 | if (EBIT_TEST(entry->flags, ENTRY_DISPATCHED)) { |
bf8fe701 | 1033 | debugs(15, 3, "neighborsUdpAck: '" << storeKeyText(key) << "' already being fetched."); |
62e76326 | 1034 | neighborCountIgnored(p); |
1035 | return; | |
d2af9477 | 1036 | } |
62e76326 | 1037 | |
26ac0430 | 1038 | if (mem == NULL) { |
bf8fe701 | 1039 | debugs(15, 2, "Ignoring " << opcode_d << " for missing mem_obj: " << storeKeyText(key)); |
62e76326 | 1040 | neighborCountIgnored(p); |
1041 | return; | |
8de2f7ad | 1042 | } |
62e76326 | 1043 | |
26ac0430 | 1044 | if (entry->ping_status != PING_WAITING) { |
bf8fe701 | 1045 | debugs(15, 2, "neighborsUdpAck: Late " << opcode_d << " for " << storeKeyText(key)); |
62e76326 | 1046 | neighborCountIgnored(p); |
1047 | return; | |
8de2f7ad | 1048 | } |
62e76326 | 1049 | |
1bfe9ade | 1050 | if (!entry->locked()) { |
5bd484b5 | 1051 | // TODO: many entries are unlocked; why is this reported at level 1? |
e0236918 | 1052 | debugs(12, DBG_IMPORTANT, "neighborsUdpAck: '" << storeKeyText(key) << "' has no locks"); |
62e76326 | 1053 | neighborCountIgnored(p); |
1054 | return; | |
090089c4 | 1055 | } |
62e76326 | 1056 | |
cb365059 EB |
1057 | if (!mem->ircb_data) { |
1058 | debugs(12, DBG_IMPORTANT, "BUG: missing ICP callback data for " << *entry); | |
1059 | neighborCountIgnored(p); | |
1060 | return; | |
1061 | } | |
1062 | ||
bf8fe701 | 1063 | debugs(15, 3, "neighborsUdpAck: " << opcode_d << " for '" << storeKeyText(key) << "' from " << (p ? p->host : "source") << " "); |
62e76326 | 1064 | |
26ac0430 | 1065 | if (p) { |
5c51bffb | 1066 | ntype = neighborType(p, mem->request->url); |
44f2f2e4 | 1067 | } |
62e76326 | 1068 | |
cb365059 | 1069 | if (ignoreMulticastReply(p, mem->ircb_data)) { |
62e76326 | 1070 | neighborCountIgnored(p); |
26ac0430 | 1071 | } else if (opcode == ICP_MISS) { |
62e76326 | 1072 | if (p == NULL) { |
1073 | neighborIgnoreNonPeer(from, opcode); | |
1074 | } else { | |
0c3d3f65 | 1075 | mem->ping_reply_callback(p, ntype, AnyP::PROTO_ICP, header, mem->ircb_data); |
62e76326 | 1076 | } |
26ac0430 | 1077 | } else if (opcode == ICP_HIT) { |
62e76326 | 1078 | if (p == NULL) { |
1079 | neighborIgnoreNonPeer(from, opcode); | |
1080 | } else { | |
1081 | header->opcode = ICP_HIT; | |
0c3d3f65 | 1082 | mem->ping_reply_callback(p, ntype, AnyP::PROTO_ICP, header, mem->ircb_data); |
62e76326 | 1083 | } |
26ac0430 | 1084 | } else if (opcode == ICP_DECHO) { |
62e76326 | 1085 | if (p == NULL) { |
1086 | neighborIgnoreNonPeer(from, opcode); | |
1087 | } else if (ntype == PEER_SIBLING) { | |
1088 | debug_trap("neighborsUdpAck: Found non-ICP cache as SIBLING\n"); | |
1089 | debug_trap("neighborsUdpAck: non-ICP neighbors must be a PARENT\n"); | |
1090 | } else { | |
0c3d3f65 | 1091 | mem->ping_reply_callback(p, ntype, AnyP::PROTO_ICP, header, mem->ircb_data); |
62e76326 | 1092 | } |
26ac0430 | 1093 | } else if (opcode == ICP_SECHO) { |
62e76326 | 1094 | if (p) { |
e0236918 | 1095 | debugs(15, DBG_IMPORTANT, "Ignoring SECHO from neighbor " << p->host); |
62e76326 | 1096 | neighborCountIgnored(p); |
62e76326 | 1097 | } else { |
e0236918 | 1098 | debugs(15, DBG_IMPORTANT, "Unsolicited SECHO from " << from); |
62e76326 | 1099 | } |
26ac0430 | 1100 | } else if (opcode == ICP_DENIED) { |
62e76326 | 1101 | if (p == NULL) { |
1102 | neighborIgnoreNonPeer(from, opcode); | |
1103 | } else if (p->stats.pings_acked > 100) { | |
1104 | if (100 * p->icp.counts[ICP_DENIED] / p->stats.pings_acked > 95) { | |
fa84c01d FC |
1105 | debugs(15, DBG_CRITICAL, "95%% of replies from '" << p->host << "' are UDP_DENIED"); |
1106 | debugs(15, DBG_CRITICAL, "Disabling '" << p->host << "', please check your configuration."); | |
62e76326 | 1107 | neighborRemove(p); |
1108 | p = NULL; | |
1109 | } else { | |
1110 | neighborCountIgnored(p); | |
1111 | } | |
1112 | } | |
26ac0430 | 1113 | } else if (opcode == ICP_MISS_NOFETCH) { |
0c3d3f65 | 1114 | mem->ping_reply_callback(p, ntype, AnyP::PROTO_ICP, header, mem->ircb_data); |
26ac0430 | 1115 | } else { |
fa84c01d | 1116 | debugs(15, DBG_CRITICAL, "neighborsUdpAck: Unexpected ICP reply: " << opcode_d); |
d2af9477 | 1117 | } |
090089c4 | 1118 | } |
1119 | ||
a3c6762c | 1120 | CachePeer * |
40a1495e | 1121 | peerFindByName(const char *name) |
98ffb7e4 | 1122 | { |
a3c6762c | 1123 | CachePeer *p = NULL; |
62e76326 | 1124 | |
40a1495e | 1125 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 1126 | if (!strcasecmp(name, p->name)) |
1127 | break; | |
98ffb7e4 | 1128 | } |
62e76326 | 1129 | |
b69f7771 | 1130 | return p; |
98ffb7e4 | 1131 | } |
b012353a | 1132 | |
a3c6762c | 1133 | CachePeer * |
db1cd23c | 1134 | peerFindByNameAndPort(const char *name, unsigned short port) |
1135 | { | |
a3c6762c | 1136 | CachePeer *p = NULL; |
62e76326 | 1137 | |
db1cd23c | 1138 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 1139 | if (strcasecmp(name, p->name)) |
1140 | continue; | |
1141 | ||
1142 | if (port != p->http_port) | |
1143 | continue; | |
1144 | ||
1145 | break; | |
db1cd23c | 1146 | } |
62e76326 | 1147 | |
db1cd23c | 1148 | return p; |
1149 | } | |
1150 | ||
5269d0bd | 1151 | int |
a3c6762c | 1152 | neighborUp(const CachePeer * p) |
5269d0bd | 1153 | { |
eb406bb7 | 1154 | if (!p->tcp_up) { |
8fcf19ec EB |
1155 | peerProbeConnect(const_cast<CachePeer*>(p)); |
1156 | return 0; | |
eb406bb7 | 1157 | } |
62e76326 | 1158 | |
64b8103b | 1159 | /* |
a3c6762c | 1160 | * The CachePeer can not be UP if we don't have any IP addresses |
26ac0430 | 1161 | * for it. |
64b8103b | 1162 | */ |
cc192b50 | 1163 | if (0 == p->n_addresses) { |
1164 | debugs(15, 8, "neighborUp: DOWN (no-ip): " << p->host << " (" << p->in_addr << ")"); | |
62e76326 | 1165 | return 0; |
cc192b50 | 1166 | } |
62e76326 | 1167 | |
cc192b50 | 1168 | if (p->options.no_query) { |
1169 | debugs(15, 8, "neighborUp: UP (no-query): " << p->host << " (" << p->in_addr << ")"); | |
67c8308c | 1170 | return 1; |
cc192b50 | 1171 | } |
67c8308c | 1172 | |
1173 | if (p->stats.probe_start != 0 && | |
cc192b50 | 1174 | squid_curtime - p->stats.probe_start > Config.Timeout.deadPeer) { |
1175 | debugs(15, 8, "neighborUp: DOWN (dead): " << p->host << " (" << p->in_addr << ")"); | |
67c8308c | 1176 | return 0; |
cc192b50 | 1177 | } |
67c8308c | 1178 | |
cc192b50 | 1179 | debugs(15, 8, "neighborUp: UP: " << p->host << " (" << p->in_addr << ")"); |
03b82057 | 1180 | return 1; |
5269d0bd | 1181 | } |
1182 | ||
0ce8e93b EB |
1183 | /// \returns the effective connect timeout for this peer |
1184 | time_t | |
1185 | peerConnectTimeout(const CachePeer *peer) | |
1186 | { | |
1187 | return peer->connect_timeout_raw > 0 ? | |
1188 | peer->connect_timeout_raw : Config.Timeout.peer_connect; | |
1189 | } | |
1190 | ||
1191 | time_t | |
1192 | positiveTimeout(const time_t timeout) | |
1193 | { | |
1194 | return max(static_cast<time_t>(1), timeout); | |
1195 | } | |
1196 | ||
dd4bd44e | 1197 | static void |
4a3b98d7 | 1198 | peerDNSConfigure(const ipcache_addrs *ia, const Dns::LookupDetails &, void *data) |
dd4bd44e | 1199 | { |
e8dca475 CT |
1200 | // TODO: connections to no-longer valid IP addresses should be |
1201 | // closed when we can detect such IP addresses. | |
1202 | ||
a3c6762c | 1203 | CachePeer *p = (CachePeer *)data; |
62e76326 | 1204 | |
b69f7771 | 1205 | if (p->n_addresses == 0) { |
e0236918 | 1206 | debugs(15, DBG_IMPORTANT, "Configuring " << neighborTypeStr(p) << " " << p->host << "/" << p->http_port << "/" << p->icp.port); |
62e76326 | 1207 | |
1208 | if (p->type == PEER_MULTICAST) | |
e0236918 | 1209 | debugs(15, DBG_IMPORTANT, " Multicast TTL = " << p->mcast.ttl); |
b69f7771 | 1210 | } |
62e76326 | 1211 | |
b69f7771 | 1212 | p->n_addresses = 0; |
62e76326 | 1213 | |
dd4bd44e | 1214 | if (ia == NULL) { |
fa84c01d | 1215 | debugs(0, DBG_CRITICAL, "WARNING: DNS lookup for '" << p->host << "' failed!"); |
62e76326 | 1216 | return; |
dd4bd44e | 1217 | } |
62e76326 | 1218 | |
fd9c47d1 | 1219 | if (ia->empty()) { |
fa84c01d | 1220 | debugs(0, DBG_CRITICAL, "WARNING: No IP address found for '" << p->host << "'!"); |
62e76326 | 1221 | return; |
dd4bd44e | 1222 | } |
62e76326 | 1223 | |
fd9c47d1 AR |
1224 | for (const auto &ip: ia->goodAndBad()) { // TODO: Consider using just good(). |
1225 | if (p->n_addresses < PEER_MAX_ADDRESSES) { | |
1226 | const auto idx = p->n_addresses++; | |
1227 | p->addresses[idx] = ip; | |
1228 | debugs(15, 2, "--> IP address #" << idx << ": " << p->addresses[idx]); | |
1229 | } else { | |
1230 | debugs(15, 3, "ignoring remaining " << (ia->size() - p->n_addresses) << " ips"); | |
1231 | break; | |
1232 | } | |
dd4bd44e | 1233 | } |
62e76326 | 1234 | |
4dd643d5 | 1235 | p->in_addr.setEmpty(); |
cc192b50 | 1236 | p->in_addr = p->addresses[0]; |
4dd643d5 | 1237 | p->in_addr.port(p->icp.port); |
62e76326 | 1238 | |
883b9a4d AR |
1239 | peerProbeConnect(p, true); // detect any died or revived peers ASAP |
1240 | ||
b69f7771 | 1241 | if (p->type == PEER_MULTICAST) |
62e76326 | 1242 | peerCountMcastPeersSchedule(p, 10); |
1243 | ||
9b5c4a9a | 1244 | #if USE_ICMP |
e51c8197 | 1245 | if (p->type != PEER_MULTICAST && IamWorkerProcess()) |
62e76326 | 1246 | if (!p->options.no_netdb_exchange) |
1247 | eventAddIsh("netdbExchangeStart", netdbExchangeStart, p, 30.0, 1); | |
9b5c4a9a AJ |
1248 | #endif |
1249 | ||
e8dca475 CT |
1250 | if (p->standby.mgr.valid()) |
1251 | PeerPoolMgr::Checkpoint(p->standby.mgr, "resolved peer"); | |
dd4bd44e | 1252 | } |
1253 | ||
1254 | static void | |
51242273 | 1255 | peerRefreshDNS(void *data) |
dd4bd44e | 1256 | { |
a3c6762c | 1257 | CachePeer *p = NULL; |
62e76326 | 1258 | |
46ca5fc6 | 1259 | if (eventFind(peerRefreshDNS, NULL)) |
62e76326 | 1260 | eventDelete(peerRefreshDNS, NULL); |
1261 | ||
51242273 | 1262 | if (!data && 0 == stat5minClientRequests()) { |
62e76326 | 1263 | /* no recent client traffic, wait a bit */ |
1264 | eventAddIsh("peerRefreshDNS", peerRefreshDNS, NULL, 180.0, 1); | |
1265 | return; | |
dd4bd44e | 1266 | } |
62e76326 | 1267 | |
1f3c4622 | 1268 | for (p = Config.peers; p; p = p->next) |
62e76326 | 1269 | ipcache_nbgethostbyname(p->host, peerDNSConfigure, p); |
1270 | ||
dd4bd44e | 1271 | /* Reconfigure the peers every hour */ |
52040193 | 1272 | eventAddIsh("peerRefreshDNS", peerRefreshDNS, NULL, 3600.0, 1); |
dd4bd44e | 1273 | } |
e924600d | 1274 | |
4ed0e075 | 1275 | static void |
a3c6762c | 1276 | peerConnectFailedSilent(CachePeer * p) |
eb406bb7 | 1277 | { |
1278 | p->stats.last_connect_failure = squid_curtime; | |
62e76326 | 1279 | |
eb406bb7 | 1280 | if (!p->tcp_up) { |
bf8fe701 | 1281 | debugs(15, 2, "TCP connection to " << p->host << "/" << p->http_port << |
1282 | " dead"); | |
62e76326 | 1283 | return; |
eb406bb7 | 1284 | } |
62e76326 | 1285 | |
5e263176 | 1286 | -- p->tcp_up; |
62e76326 | 1287 | |
eb406bb7 | 1288 | if (!p->tcp_up) { |
e0236918 | 1289 | debugs(15, DBG_IMPORTANT, "Detected DEAD " << neighborTypeStr(p) << ": " << p->name); |
62e76326 | 1290 | p->stats.logged_state = PEER_DEAD; |
eb406bb7 | 1291 | } |
1292 | } | |
1293 | ||
4ed0e075 | 1294 | void |
a3c6762c | 1295 | peerConnectFailed(CachePeer *p) |
4ed0e075 | 1296 | { |
e0236918 | 1297 | debugs(15, DBG_IMPORTANT, "TCP connection to " << p->host << "/" << p->http_port << " failed"); |
4ed0e075 | 1298 | peerConnectFailedSilent(p); |
1299 | } | |
1300 | ||
eb406bb7 | 1301 | void |
a3c6762c | 1302 | peerConnectSucceded(CachePeer * p) |
eb406bb7 | 1303 | { |
1304 | if (!p->tcp_up) { | |
61beade2 | 1305 | debugs(15, 2, "TCP connection to " << p->host << "/" << p->http_port << " succeeded"); |
ff9970cc | 1306 | p->tcp_up = p->connect_fail_limit; // NP: so peerAlive(p) works properly. |
32a47e3e | 1307 | peerAlive(p); |
26ac0430 AJ |
1308 | if (!p->n_addresses) |
1309 | ipcache_nbgethostbyname(p->host, peerDNSConfigure, p); | |
1310 | } else | |
ff9970cc | 1311 | p->tcp_up = p->connect_fail_limit; |
eb406bb7 | 1312 | } |
1313 | ||
883b9a4d AR |
1314 | /// whether new TCP probes are currently banned |
1315 | static bool | |
1316 | peerProbeIsBusy(const CachePeer *p) | |
1317 | { | |
1318 | if (p->testing_now > 0) { | |
1319 | debugs(15, 8, "yes, probing " << p); | |
1320 | return true; | |
1321 | } | |
1322 | if (squid_curtime - p->stats.last_connect_probe == 0) { | |
1323 | debugs(15, 8, "yes, just probed " << p); | |
1324 | return true; | |
1325 | } | |
1326 | return false; | |
1327 | } | |
4ed0e075 | 1328 | /* |
26ac0430 | 1329 | * peerProbeConnect will be called on dead peers by neighborUp |
4ed0e075 | 1330 | */ |
8fcf19ec | 1331 | static void |
883b9a4d | 1332 | peerProbeConnect(CachePeer *p, const bool reprobeIfBusy) |
e924600d | 1333 | { |
883b9a4d AR |
1334 | if (peerProbeIsBusy(p)) { |
1335 | p->reprobe = reprobeIfBusy; | |
8fcf19ec EB |
1336 | return; |
1337 | } | |
883b9a4d | 1338 | p->reprobe = false; |
62e76326 | 1339 | |
8fcf19ec | 1340 | const time_t ctimeout = peerConnectTimeout(p); |
a3c6762c | 1341 | /* for each IP address of this CachePeer. find one that we can connect to and probe it. */ |
5db6bf73 | 1342 | for (int i = 0; i < p->n_addresses; ++i) { |
f9b72e0c | 1343 | Comm::ConnectionPointer conn = new Comm::Connection; |
cfd66529 | 1344 | conn->remote = p->addresses[i]; |
4dd643d5 | 1345 | conn->remote.port(p->http_port); |
06c40c46 | 1346 | conn->setPeer(p); |
cfd66529 | 1347 | getOutgoingAddress(NULL, conn); |
cc192b50 | 1348 | |
5db6bf73 | 1349 | ++ p->testing_now; |
715b5def | 1350 | |
aed188fd | 1351 | AsyncCall::Pointer call = commCbCall(15,3, "peerProbeConnectDone", CommConnectCbPtrFun(peerProbeConnectDone, p)); |
4accd6d8 | 1352 | Comm::ConnOpener *cs = new Comm::ConnOpener(conn, call, ctimeout); |
aed188fd | 1353 | cs->setHost(p->host); |
855150a4 | 1354 | AsyncJob::Start(cs); |
715b5def AJ |
1355 | } |
1356 | ||
eb406bb7 | 1357 | p->stats.last_connect_probe = squid_curtime; |
e924600d | 1358 | } |
1359 | ||
1360 | static void | |
ced8def3 | 1361 | peerProbeConnectDone(const Comm::ConnectionPointer &conn, Comm::Flag status, int, void *data) |
e924600d | 1362 | { |
a3c6762c | 1363 | CachePeer *p = (CachePeer*)data; |
62e76326 | 1364 | |
c8407295 | 1365 | if (status == Comm::OK) { |
62e76326 | 1366 | peerConnectSucceded(p); |
e924600d | 1367 | } else { |
4ed0e075 | 1368 | peerConnectFailedSilent(p); |
e924600d | 1369 | } |
62e76326 | 1370 | |
5e263176 | 1371 | -- p->testing_now; |
db9bf30d AJ |
1372 | conn->close(); |
1373 | // TODO: log this traffic. | |
883b9a4d AR |
1374 | |
1375 | if (p->reprobe) | |
1376 | peerProbeConnect(p); | |
e924600d | 1377 | } |
1378 | ||
429fdbec | 1379 | static void |
a3c6762c | 1380 | peerCountMcastPeersSchedule(CachePeer * p, time_t when) |
429fdbec | 1381 | { |
b515fc11 | 1382 | if (p->mcast.flags.count_event_pending) |
62e76326 | 1383 | return; |
1384 | ||
429fdbec | 1385 | eventAdd("peerCountMcastPeersStart", |
62e76326 | 1386 | peerCountMcastPeersStart, |
1387 | p, | |
1388 | (double) when, 1); | |
1389 | ||
ccdf4138 | 1390 | p->mcast.flags.count_event_pending = true; |
429fdbec | 1391 | } |
1392 | ||
1393 | static void | |
1394 | peerCountMcastPeersStart(void *data) | |
1395 | { | |
6043e368 AR |
1396 | // XXX: Do not create lots of complex fake objects (while abusing their |
1397 | // APIs) to pass around a few basic data points like start_ping and ping! | |
a3c6762c | 1398 | CachePeer *p = (CachePeer *)data; |
429fdbec | 1399 | MemObject *mem; |
007b8be4 | 1400 | int reqnum; |
c8ab5ec6 | 1401 | // TODO: use class AnyP::Uri instead of constructing and re-parsing a string |
429fdbec | 1402 | LOCAL_ARRAY(char, url, MAX_URL); |
ce66013b | 1403 | assert(p->type == PEER_MULTICAST); |
ccdf4138 | 1404 | p->mcast.flags.count_event_pending = false; |
cc192b50 | 1405 | snprintf(url, MAX_URL, "http://"); |
4dd643d5 | 1406 | p->in_addr.toUrl(url+7, MAX_URL -8 ); |
cc192b50 | 1407 | strcat(url, "/"); |
5ceaee75 | 1408 | const MasterXaction::Pointer mx = new MasterXaction(XactionInitiator::initPeerMcast); |
6c880a16 | 1409 | auto *req = HttpRequest::FromUrlXXX(url, mx); |
8babada0 AJ |
1410 | assert(req != nullptr); |
1411 | StoreEntry *fake = storeCreateEntry(url, url, RequestFlags(), Http::METHOD_GET); | |
cb835136 | 1412 | const auto psstate = new PeerSelector(nullptr); |
b248c2a3 AJ |
1413 | psstate->request = req; |
1414 | HTTPMSGLOCK(psstate->request); | |
429fdbec | 1415 | psstate->entry = fake; |
6043e368 | 1416 | psstate->peerCountMcastPeerXXX = cbdataReference(p); |
b4e7f82d | 1417 | psstate->ping.start = current_time; |
429fdbec | 1418 | mem = fake->mem_obj; |
b248c2a3 | 1419 | mem->request = psstate->request; |
429fdbec | 1420 | mem->start_ping = current_time; |
b4e7f82d | 1421 | mem->ping_reply_callback = peerCountHandleIcpReply; |
429fdbec | 1422 | mem->ircb_data = psstate; |
e0d28505 | 1423 | mcastSetTtl(icpOutgoingConn->fd, p->mcast.ttl); |
007b8be4 | 1424 | p->mcast.id = mem->id; |
332dafa2 | 1425 | reqnum = icpSetCacheKey((const cache_key *)fake->key); |
d2a6dcba EB |
1426 | icpCreateAndSend(ICP_QUERY, 0, url, reqnum, 0, |
1427 | icpOutgoingConn->fd, p->in_addr, psstate->al); | |
429fdbec | 1428 | fake->ping_status = PING_WAITING; |
1429 | eventAdd("peerCountMcastPeersDone", | |
62e76326 | 1430 | peerCountMcastPeersDone, |
1431 | psstate, | |
99117d82 | 1432 | Config.Timeout.mcast_icp_query / 1000.0, 1); |
ccdf4138 | 1433 | p->mcast.flags.counting = true; |
429fdbec | 1434 | peerCountMcastPeersSchedule(p, MCAST_COUNT_RATE); |
1435 | } | |
1436 | ||
1437 | static void | |
1438 | peerCountMcastPeersDone(void *data) | |
1439 | { | |
cb835136 | 1440 | const auto psstate = static_cast<PeerSelector*>(data); |
429fdbec | 1441 | StoreEntry *fake = psstate->entry; |
99117d82 | 1442 | |
6043e368 AR |
1443 | if (cbdataReferenceValid(psstate->peerCountMcastPeerXXX)) { |
1444 | CachePeer *p = (CachePeer *)psstate->peerCountMcastPeerXXX; | |
ccdf4138 | 1445 | p->mcast.flags.counting = false; |
a98bcbee | 1446 | p->mcast.avg_n_members = Math::doubleAverage(p->mcast.avg_n_members, (double) psstate->ping.n_recv, ++p->mcast.n_times_counted, 10); |
e0236918 | 1447 | debugs(15, DBG_IMPORTANT, "Group " << p->host << ": " << psstate->ping.n_recv << |
bf8fe701 | 1448 | " replies, "<< std::setw(4)<< std::setprecision(2) << |
1449 | p->mcast.avg_n_members <<" average, RTT " << p->stats.rtt); | |
99117d82 | 1450 | p->mcast.n_replies_expected = (int) p->mcast.avg_n_members; |
1451 | } | |
1452 | ||
6043e368 | 1453 | cbdataReferenceDone(psstate->peerCountMcastPeerXXX); |
99117d82 | 1454 | |
bc52369a | 1455 | fake->abort(); // sets ENTRY_ABORTED and initiates releated cleanup |
c43405e7 | 1456 | fake->mem_obj->request = nullptr; |
acc5dc4c | 1457 | fake->unlock("peerCountMcastPeersDone"); |
bd6e2f16 | 1458 | delete psstate; |
429fdbec | 1459 | } |
1460 | ||
1461 | static void | |
ced8def3 | 1462 | peerCountHandleIcpReply(CachePeer * p, peer_t, AnyP::ProtocolType proto, void *, void *data) |
429fdbec | 1463 | { |
cb835136 | 1464 | const auto psstate = static_cast<PeerSelector*>(data); |
1a827bc0 | 1465 | StoreEntry *fake = psstate->entry; |
ced8def3 | 1466 | assert(fake); |
1a827bc0 | 1467 | MemObject *mem = fake->mem_obj; |
ced8def3 | 1468 | assert(mem); |
1a827bc0 | 1469 | int rtt = tvSubMsec(mem->start_ping, current_time); |
0c3d3f65 | 1470 | assert(proto == AnyP::PROTO_ICP); |
5db6bf73 | 1471 | ++ psstate->ping.n_recv; |
ced8def3 | 1472 | int rtt_av_factor = RTT_AV_FACTOR; |
62e76326 | 1473 | |
d1b63fc8 | 1474 | if (p->options.weighted_roundrobin) |
62e76326 | 1475 | rtt_av_factor = RTT_BACKGROUND_AV_FACTOR; |
1476 | ||
a98bcbee | 1477 | p->stats.rtt = Math::intAverage(p->stats.rtt, rtt, psstate->ping.n_recv, rtt_av_factor); |
429fdbec | 1478 | } |
ed7f5615 | 1479 | |
1480 | static void | |
1481 | neighborDumpPeers(StoreEntry * sentry) | |
1482 | { | |
1483 | dump_peers(sentry, Config.peers); | |
1484 | } | |
1485 | ||
1486 | static void | |
1487 | neighborDumpNonPeers(StoreEntry * sentry) | |
1488 | { | |
1489 | dump_peers(sentry, non_peers); | |
1490 | } | |
1491 | ||
a369131d | 1492 | void |
a3c6762c | 1493 | dump_peer_options(StoreEntry * sentry, CachePeer * p) |
a369131d | 1494 | { |
cd196bc8 | 1495 | if (p->options.proxy_only) |
62e76326 | 1496 | storeAppendPrintf(sentry, " proxy-only"); |
1497 | ||
cd196bc8 | 1498 | if (p->options.no_query) |
62e76326 | 1499 | storeAppendPrintf(sentry, " no-query"); |
1500 | ||
d1b63fc8 | 1501 | if (p->options.background_ping) |
62e76326 | 1502 | storeAppendPrintf(sentry, " background-ping"); |
1503 | ||
cd196bc8 | 1504 | if (p->options.no_digest) |
62e76326 | 1505 | storeAppendPrintf(sentry, " no-digest"); |
1506 | ||
cd196bc8 | 1507 | if (p->options.default_parent) |
62e76326 | 1508 | storeAppendPrintf(sentry, " default"); |
1509 | ||
cd196bc8 | 1510 | if (p->options.roundrobin) |
62e76326 | 1511 | storeAppendPrintf(sentry, " round-robin"); |
1512 | ||
f7e1d9ce HN |
1513 | if (p->options.carp) |
1514 | storeAppendPrintf(sentry, " carp"); | |
354b5a2b | 1515 | |
2f1431ea | 1516 | #if USE_AUTH |
f7e1d9ce HN |
1517 | if (p->options.userhash) |
1518 | storeAppendPrintf(sentry, " userhash"); | |
354b5a2b | 1519 | #endif |
f7e1d9ce | 1520 | |
354b5a2b | 1521 | if (p->options.sourcehash) |
f7e1d9ce | 1522 | storeAppendPrintf(sentry, " sourcehash"); |
354b5a2b | 1523 | |
d1b63fc8 | 1524 | if (p->options.weighted_roundrobin) |
62e76326 | 1525 | storeAppendPrintf(sentry, " weighted-round-robin"); |
1526 | ||
cd196bc8 | 1527 | if (p->options.mcast_responder) |
62e76326 | 1528 | storeAppendPrintf(sentry, " multicast-responder"); |
1529 | ||
8a368316 AJ |
1530 | #if PEER_MULTICAST_SIBLINGS |
1531 | if (p->options.mcast_siblings) | |
1532 | storeAppendPrintf(sentry, " multicast-siblings"); | |
1533 | #endif | |
1534 | ||
678a066c | 1535 | if (p->weight != 1) |
62e76326 | 1536 | storeAppendPrintf(sentry, " weight=%d", p->weight); |
1537 | ||
cd196bc8 | 1538 | if (p->options.closest_only) |
62e76326 | 1539 | storeAppendPrintf(sentry, " closest-only"); |
1540 | ||
dc9d133b | 1541 | #if USE_HTCP |
18191440 | 1542 | if (p->options.htcp) { |
62e76326 | 1543 | storeAppendPrintf(sentry, " htcp"); |
18191440 | 1544 | if (p->options.htcp_oldsquid || p->options.htcp_no_clr || p->options.htcp_no_purge_clr || p->options.htcp_only_clr) { |
4ac1880a FC |
1545 | bool doneopts = false; |
1546 | if (p->options.htcp_oldsquid) { | |
1547 | storeAppendPrintf(sentry, "oldsquid"); | |
1548 | doneopts = true; | |
1549 | } | |
1550 | if (p->options.htcp_no_clr) { | |
1551 | storeAppendPrintf(sentry, "%sno-clr",(doneopts?",":"=")); | |
1552 | doneopts = true; | |
1553 | } | |
1554 | if (p->options.htcp_no_purge_clr) { | |
1555 | storeAppendPrintf(sentry, "%sno-purge-clr",(doneopts?",":"=")); | |
1556 | doneopts = true; | |
1557 | } | |
1558 | if (p->options.htcp_only_clr) { | |
1559 | storeAppendPrintf(sentry, "%sonly-clr",(doneopts?",":"=")); | |
1560 | //doneopts = true; // uncomment if more opts are added | |
1561 | } | |
18191440 AJ |
1562 | } |
1563 | } | |
dc9d133b | 1564 | #endif |
62e76326 | 1565 | |
cd196bc8 | 1566 | if (p->options.no_netdb_exchange) |
62e76326 | 1567 | storeAppendPrintf(sentry, " no-netdb-exchange"); |
1568 | ||
9a0a18de | 1569 | #if USE_DELAY_POOLS |
cd196bc8 | 1570 | if (p->options.no_delay) |
62e76326 | 1571 | storeAppendPrintf(sentry, " no-delay"); |
95e36d02 | 1572 | #endif |
62e76326 | 1573 | |
c68e9c6b | 1574 | if (p->login) |
62e76326 | 1575 | storeAppendPrintf(sentry, " login=%s", p->login); |
1576 | ||
a369131d | 1577 | if (p->mcast.ttl > 0) |
62e76326 | 1578 | storeAppendPrintf(sentry, " ttl=%d", p->mcast.ttl); |
1579 | ||
0ce8e93b EB |
1580 | if (p->connect_timeout_raw > 0) |
1581 | storeAppendPrintf(sentry, " connect-timeout=%d", (int)p->connect_timeout_raw); | |
62e76326 | 1582 | |
ff9970cc AJ |
1583 | if (p->connect_fail_limit != PEER_TCP_MAGIC_COUNT) |
1584 | storeAppendPrintf(sentry, " connect-fail-limit=%d", p->connect_fail_limit); | |
1585 | ||
be753325 | 1586 | #if USE_CACHE_DIGESTS |
62e76326 | 1587 | |
be753325 | 1588 | if (p->digest_url) |
62e76326 | 1589 | storeAppendPrintf(sentry, " digest-url=%s", p->digest_url); |
1590 | ||
be753325 | 1591 | #endif |
62e76326 | 1592 | |
be753325 | 1593 | if (p->options.allow_miss) |
62e76326 | 1594 | storeAppendPrintf(sentry, " allow-miss"); |
1595 | ||
b0758e04 AJ |
1596 | if (p->options.no_tproxy) |
1597 | storeAppendPrintf(sentry, " no-tproxy"); | |
1598 | ||
be753325 | 1599 | if (p->max_conn > 0) |
62e76326 | 1600 | storeAppendPrintf(sentry, " max-conn=%d", p->max_conn); |
e8dca475 CT |
1601 | if (p->standby.limit > 0) |
1602 | storeAppendPrintf(sentry, " standby=%d", p->standby.limit); | |
62e76326 | 1603 | |
be753325 | 1604 | if (p->options.originserver) |
62e76326 | 1605 | storeAppendPrintf(sentry, " originserver"); |
1606 | ||
be753325 | 1607 | if (p->domain) |
62e76326 | 1608 | storeAppendPrintf(sentry, " forceddomain=%s", p->domain); |
1609 | ||
26ac0430 AJ |
1610 | if (p->connection_auth == 0) |
1611 | storeAppendPrintf(sentry, " connection-auth=off"); | |
1612 | else if (p->connection_auth == 1) | |
1613 | storeAppendPrintf(sentry, " connection-auth=on"); | |
1614 | else if (p->connection_auth == 2) | |
1615 | storeAppendPrintf(sentry, " connection-auth=auto"); | |
d67acb4e | 1616 | |
8250ca31 | 1617 | p->secure.dumpCfg(sentry,"tls-"); |
a369131d | 1618 | storeAppendPrintf(sentry, "\n"); |
1619 | } | |
1620 | ||
ed7f5615 | 1621 | static void |
a3c6762c | 1622 | dump_peers(StoreEntry * sentry, CachePeer * peers) |
ed7f5615 | 1623 | { |
cc192b50 | 1624 | char ntoabuf[MAX_IPSTRLEN]; |
06e6d12a | 1625 | int i; |
62e76326 | 1626 | |
ed7f5615 | 1627 | if (peers == NULL) |
62e76326 | 1628 | storeAppendPrintf(sentry, "There are no neighbors installed.\n"); |
1629 | ||
f1a5d071 | 1630 | for (CachePeer *e = peers; e; e = e->next) { |
62e76326 | 1631 | assert(e->host != NULL); |
1632 | storeAppendPrintf(sentry, "\n%-11.11s: %s\n", | |
1633 | neighborTypeStr(e), | |
1634 | e->name); | |
1635 | storeAppendPrintf(sentry, "Host : %s/%d/%d\n", | |
1636 | e->host, | |
1637 | e->http_port, | |
1638 | e->icp.port); | |
1639 | storeAppendPrintf(sentry, "Flags :"); | |
1640 | dump_peer_options(sentry, e); | |
1641 | ||
5db6bf73 | 1642 | for (i = 0; i < e->n_addresses; ++i) { |
62e76326 | 1643 | storeAppendPrintf(sentry, "Address[%d] : %s\n", i, |
4dd643d5 | 1644 | e->addresses[i].toStr(ntoabuf,MAX_IPSTRLEN) ); |
62e76326 | 1645 | } |
1646 | ||
1647 | storeAppendPrintf(sentry, "Status : %s\n", | |
1648 | neighborUp(e) ? "Up" : "Down"); | |
1649 | storeAppendPrintf(sentry, "FETCHES : %d\n", e->stats.fetches); | |
1650 | storeAppendPrintf(sentry, "OPEN CONNS : %d\n", e->stats.conn_open); | |
1651 | storeAppendPrintf(sentry, "AVG RTT : %d msec\n", e->stats.rtt); | |
1652 | ||
1653 | if (!e->options.no_query) { | |
1654 | storeAppendPrintf(sentry, "LAST QUERY : %8d seconds ago\n", | |
1655 | (int) (squid_curtime - e->stats.last_query)); | |
1656 | ||
1657 | if (e->stats.last_reply > 0) | |
1658 | storeAppendPrintf(sentry, "LAST REPLY : %8d seconds ago\n", | |
1659 | (int) (squid_curtime - e->stats.last_reply)); | |
1660 | else | |
1661 | storeAppendPrintf(sentry, "LAST REPLY : none received\n"); | |
1662 | ||
1663 | storeAppendPrintf(sentry, "PINGS SENT : %8d\n", e->stats.pings_sent); | |
1664 | ||
1665 | storeAppendPrintf(sentry, "PINGS ACKED: %8d %3d%%\n", | |
1666 | e->stats.pings_acked, | |
a98bcbee | 1667 | Math::intPercent(e->stats.pings_acked, e->stats.pings_sent)); |
62e76326 | 1668 | } |
1669 | ||
a98bcbee | 1670 | storeAppendPrintf(sentry, "IGNORED : %8d %3d%%\n", e->stats.ignored_replies, Math::intPercent(e->stats.ignored_replies, e->stats.pings_acked)); |
62e76326 | 1671 | |
1672 | if (!e->options.no_query) { | |
1673 | storeAppendPrintf(sentry, "Histogram of PINGS ACKED:\n"); | |
1994bb24 | 1674 | #if USE_HTCP |
62e76326 | 1675 | |
1676 | if (e->options.htcp) { | |
1677 | storeAppendPrintf(sentry, "\tMisses\t%8d %3d%%\n", | |
1678 | e->htcp.counts[0], | |
a98bcbee | 1679 | Math::intPercent(e->htcp.counts[0], e->stats.pings_acked)); |
62e76326 | 1680 | storeAppendPrintf(sentry, "\tHits\t%8d %3d%%\n", |
1681 | e->htcp.counts[1], | |
a98bcbee | 1682 | Math::intPercent(e->htcp.counts[1], e->stats.pings_acked)); |
62e76326 | 1683 | } else { |
1994bb24 | 1684 | #endif |
62e76326 | 1685 | |
2fefc43c | 1686 | for (auto op : WholeEnum<icp_opcode>()) { |
62e76326 | 1687 | if (e->icp.counts[op] == 0) |
1688 | continue; | |
1689 | ||
1690 | storeAppendPrintf(sentry, " %12.12s : %8d %3d%%\n", | |
1691 | icp_opcode_str[op], | |
1692 | e->icp.counts[op], | |
a98bcbee | 1693 | Math::intPercent(e->icp.counts[op], e->stats.pings_acked)); |
62e76326 | 1694 | } |
1695 | ||
1994bb24 | 1696 | #if USE_HTCP |
62e76326 | 1697 | |
1698 | } | |
1699 | ||
1994bb24 | 1700 | #endif |
62e76326 | 1701 | |
1702 | } | |
1703 | ||
1704 | if (e->stats.last_connect_failure) { | |
1705 | storeAppendPrintf(sentry, "Last failed connect() at: %s\n", | |
20efa1c2 | 1706 | Time::FormatHttpd(e->stats.last_connect_failure)); |
62e76326 | 1707 | } |
1708 | ||
a98bcbee | 1709 | storeAppendPrintf(sentry, "keep-alive ratio: %d%%\n", Math::intPercent(e->stats.n_keepalives_recv, e->stats.n_keepalives_sent)); |
ed7f5615 | 1710 | } |
1711 | } | |
86aebcda | 1712 | |
1713 | #if USE_HTCP | |
1714 | void | |
fad2588a | 1715 | neighborsHtcpReply(const cache_key * key, HtcpReplyData * htcp, const Ip::Address &from) |
86aebcda | 1716 | { |
80d0fe08 | 1717 | StoreEntry *e = Store::Root().findCallbackXXX(key); |
399cabec | 1718 | MemObject *mem = NULL; |
a3c6762c | 1719 | CachePeer *p; |
399cabec | 1720 | peer_t ntype = PEER_NONE; |
26ac0430 AJ |
1721 | debugs(15, 6, "neighborsHtcpReply: " << |
1722 | (htcp->hit ? "HIT" : "MISS") << " " << | |
1723 | storeKeyText(key) ); | |
62e76326 | 1724 | |
88e13392 | 1725 | if (NULL != e) |
62e76326 | 1726 | mem = e->mem_obj; |
1727 | ||
399cabec | 1728 | if ((p = whichPeer(from))) |
62e76326 | 1729 | neighborAliveHtcp(p, mem, htcp); |
1730 | ||
399cabec | 1731 | /* Does the entry exist? */ |
26ac0430 | 1732 | if (NULL == e) { |
bf8fe701 | 1733 | debugs(12, 3, "neighyborsHtcpReply: Cache key '" << storeKeyText(key) << "' not found"); |
62e76326 | 1734 | neighborCountIgnored(p); |
1735 | return; | |
399cabec | 1736 | } |
62e76326 | 1737 | |
399cabec | 1738 | /* check if someone is already fetching it */ |
26ac0430 | 1739 | if (EBIT_TEST(e->flags, ENTRY_DISPATCHED)) { |
bf8fe701 | 1740 | debugs(15, 3, "neighborsUdpAck: '" << storeKeyText(key) << "' already being fetched."); |
62e76326 | 1741 | neighborCountIgnored(p); |
1742 | return; | |
399cabec | 1743 | } |
62e76326 | 1744 | |
26ac0430 | 1745 | if (mem == NULL) { |
bf8fe701 | 1746 | debugs(15, 2, "Ignoring reply for missing mem_obj: " << storeKeyText(key)); |
62e76326 | 1747 | neighborCountIgnored(p); |
1748 | return; | |
399cabec | 1749 | } |
62e76326 | 1750 | |
26ac0430 | 1751 | if (e->ping_status != PING_WAITING) { |
bf8fe701 | 1752 | debugs(15, 2, "neighborsUdpAck: Entry " << storeKeyText(key) << " is not PING_WAITING"); |
62e76326 | 1753 | neighborCountIgnored(p); |
1754 | return; | |
399cabec | 1755 | } |
62e76326 | 1756 | |
1bfe9ade | 1757 | if (!e->locked()) { |
5bd484b5 | 1758 | // TODO: many entries are unlocked; why is this reported at level 1? |
e0236918 | 1759 | debugs(12, DBG_IMPORTANT, "neighborsUdpAck: '" << storeKeyText(key) << "' has no locks"); |
62e76326 | 1760 | neighborCountIgnored(p); |
1761 | return; | |
399cabec | 1762 | } |
62e76326 | 1763 | |
cb365059 EB |
1764 | if (!mem->ircb_data) { |
1765 | debugs(12, DBG_IMPORTANT, "BUG: missing HTCP callback data for " << *e); | |
1766 | neighborCountIgnored(p); | |
1767 | return; | |
1768 | } | |
1769 | ||
26ac0430 | 1770 | if (p) { |
5c51bffb | 1771 | ntype = neighborType(p, mem->request->url); |
62e76326 | 1772 | neighborUpdateRtt(p, mem); |
44f2f2e4 | 1773 | } |
62e76326 | 1774 | |
cb365059 | 1775 | if (ignoreMulticastReply(p, mem->ircb_data)) { |
62e76326 | 1776 | neighborCountIgnored(p); |
1777 | return; | |
399cabec | 1778 | } |
62e76326 | 1779 | |
bf8fe701 | 1780 | debugs(15, 3, "neighborsHtcpReply: e = " << e); |
ccfbe8f4 | 1781 | // TODO: Refactor (ping_reply_callback,ircb_data) to add CodeContext. |
0c3d3f65 | 1782 | mem->ping_reply_callback(p, ntype, AnyP::PROTO_HTCP, htcp, mem->ircb_data); |
86aebcda | 1783 | } |
62e76326 | 1784 | |
1bd06eff BR |
1785 | /* |
1786 | * Send HTCP CLR messages to all peers configured to receive them. | |
1787 | */ | |
4f4fa815 | 1788 | void |
8dceeee3 | 1789 | neighborsHtcpClear(StoreEntry * e, const char *uri, HttpRequest * req, const HttpRequestMethod &method, htcp_clr_reason reason) |
4f4fa815 | 1790 | { |
a3c6762c | 1791 | CachePeer *p; |
4f4fa815 BR |
1792 | char buf[128]; |
1793 | ||
4f4fa815 BR |
1794 | for (p = Config.peers; p; p = p->next) { |
1795 | if (!p->options.htcp) { | |
1796 | continue; | |
1797 | } | |
1798 | if (p->options.htcp_no_clr) { | |
1799 | continue; | |
1800 | } | |
1801 | if (p->options.htcp_no_purge_clr && reason == HTCP_CLR_PURGE) { | |
1802 | continue; | |
1803 | } | |
4dd643d5 | 1804 | debugs(15, 3, "neighborsHtcpClear: sending CLR to " << p->in_addr.toUrl(buf, 128)); |
4f4fa815 BR |
1805 | htcpClear(e, uri, req, method, p, reason); |
1806 | } | |
1807 | } | |
1808 | ||
86aebcda | 1809 | #endif |
f53969cc | 1810 |