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30a4f2a8 | 1 | /* |
bde978a6 | 2 | * Copyright (C) 1996-2015 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" |
b814e8d4 | 14 | #include "CacheDigest.h" |
a011edee | 15 | #include "CachePeer.h" |
b802d2cb | 16 | #include "CachePeerDomainList.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" |
b1bd952a | 47 | #include "URL.h" |
090089c4 | 48 | |
429fdbec | 49 | /* count mcast group peers every 15 minutes */ |
50 | #define MCAST_COUNT_RATE 900 | |
51 | ||
a3c6762c FC |
52 | bool peerAllowedToUse(const CachePeer *, HttpRequest *); |
53 | static int peerWouldBePinged(const CachePeer *, HttpRequest *); | |
54 | static void neighborRemove(CachePeer *); | |
55 | static void neighborAlive(CachePeer *, const MemObject *, const icp_common_t *); | |
399cabec | 56 | #if USE_HTCP |
fad2588a | 57 | static void neighborAliveHtcp(CachePeer *, const MemObject *, const HtcpReplyData *); |
399cabec | 58 | #endif |
a3c6762c | 59 | static void neighborCountIgnored(CachePeer *); |
f5b8bbc4 | 60 | static void peerRefreshDNS(void *); |
b69f7771 | 61 | static IPH peerDNSConfigure; |
a3c6762c | 62 | static bool peerProbeConnect(CachePeer *); |
eb406bb7 | 63 | static CNCB peerProbeConnectDone; |
f5b8bbc4 | 64 | static void peerCountMcastPeersDone(void *data); |
65 | static void peerCountMcastPeersStart(void *data); | |
a3c6762c | 66 | static void peerCountMcastPeersSchedule(CachePeer * p, time_t when); |
b3264694 | 67 | static IRCB peerCountHandleIcpReply; |
62e76326 | 68 | |
b7ac5457 | 69 | static void neighborIgnoreNonPeer(const Ip::Address &, icp_opcode); |
ed7f5615 | 70 | static OBJH neighborDumpPeers; |
71 | static OBJH neighborDumpNonPeers; | |
a3c6762c | 72 | static void dump_peers(StoreEntry * sentry, CachePeer * peers); |
090089c4 | 73 | |
f45dd259 | 74 | static unsigned short echo_port; |
30a4f2a8 | 75 | |
c7a3724d | 76 | static int NLateReplies = 0; |
a3c6762c | 77 | static CachePeer *first_ping = NULL; |
28070024 | 78 | |
a2c963ae | 79 | const char * |
a3c6762c | 80 | neighborTypeStr(const CachePeer * p) |
69a71bd7 | 81 | { |
e102ebda | 82 | if (p->type == PEER_NONE) |
62e76326 | 83 | return "Non-Peer"; |
84 | ||
b69f7771 | 85 | if (p->type == PEER_SIBLING) |
62e76326 | 86 | return "Sibling"; |
87 | ||
b69f7771 | 88 | if (p->type == PEER_MULTICAST) |
62e76326 | 89 | return "Multicast Group"; |
90 | ||
69a71bd7 | 91 | return "Parent"; |
92 | } | |
93 | ||
a3c6762c | 94 | CachePeer * |
b7ac5457 | 95 | whichPeer(const Ip::Address &from) |
090089c4 | 96 | { |
22e4fa85 | 97 | int j; |
62e76326 | 98 | |
a3c6762c | 99 | CachePeer *p = NULL; |
cc192b50 | 100 | debugs(15, 3, "whichPeer: from " << from); |
62e76326 | 101 | |
26ac0430 | 102 | for (p = Config.peers; p; p = p->next) { |
5db6bf73 | 103 | for (j = 0; j < p->n_addresses; ++j) { |
4dd643d5 | 104 | if (from == p->addresses[j] && from.port() == p->icp.port) { |
62e76326 | 105 | return p; |
106 | } | |
107 | } | |
090089c4 | 108 | } |
62e76326 | 109 | |
4eda6afe | 110 | return NULL; |
090089c4 | 111 | } |
112 | ||
701a8572 | 113 | peer_t |
a3c6762c | 114 | neighborType(const CachePeer * p, const HttpRequest * request) |
24a1003d | 115 | { |
62e76326 | 116 | |
5844d003 | 117 | const NeighborTypeDomainList *d = NULL; |
62e76326 | 118 | |
b69f7771 | 119 | for (d = p->typelist; d; d = d->next) { |
cc192b50 | 120 | if (0 == matchDomainName(request->GetHost(), d->domain)) |
62e76326 | 121 | if (d->type != PEER_NONE) |
122 | return d->type; | |
24a1003d | 123 | } |
8a368316 AJ |
124 | #if PEER_MULTICAST_SIBLINGS |
125 | if (p->type == PEER_MULTICAST) | |
126 | if (p->options.mcast_siblings) | |
127 | return PEER_SIBLING; | |
128 | #endif | |
62e76326 | 129 | |
b69f7771 | 130 | return p->type; |
24a1003d | 131 | } |
132 | ||
2efeb0b7 AJ |
133 | /** |
134 | * \return Whether it is appropriate to fetch REQUEST from PEER. | |
7b3bd12c | 135 | */ |
2efeb0b7 | 136 | bool |
a3c6762c | 137 | peerAllowedToUse(const CachePeer * p, HttpRequest * request) |
090089c4 | 138 | { |
62e76326 | 139 | |
b802d2cb | 140 | const CachePeerDomainList *d = NULL; |
ce66013b | 141 | assert(request != NULL); |
62e76326 | 142 | |
9689d97c | 143 | if (neighborType(p, request) == PEER_SIBLING) { |
8a368316 AJ |
144 | #if PEER_MULTICAST_SIBLINGS |
145 | if (p->type == PEER_MULTICAST && p->options.mcast_siblings && | |
450fe1cb | 146 | (request->flags.noCache || request->flags.refresh || request->flags.loopDetected || request->flags.needValidation)) |
11992b6f | 147 | debugs(15, 2, "peerAllowedToUse(" << p->name << ", " << request->GetHost() << ") : multicast-siblings optimization match"); |
8a368316 | 148 | #endif |
450fe1cb | 149 | if (request->flags.noCache) |
2efeb0b7 | 150 | return false; |
62e76326 | 151 | |
45e5102d | 152 | if (request->flags.refresh) |
2efeb0b7 | 153 | return false; |
62e76326 | 154 | |
450fe1cb | 155 | if (request->flags.loopDetected) |
2efeb0b7 | 156 | return false; |
62e76326 | 157 | |
450fe1cb | 158 | if (request->flags.needValidation) |
2efeb0b7 | 159 | return false; |
9689d97c | 160 | } |
62e76326 | 161 | |
ad46590b | 162 | // CONNECT requests are proxy requests. Not to be forwarded to origin servers. |
a3c6762c | 163 | // Unless the destination port matches, in which case we MAY perform a 'DIRECT' to this CachePeer. |
4dd643d5 | 164 | if (p->options.originserver && request->method == Http::METHOD_CONNECT && request->port != p->in_addr.port()) |
2efeb0b7 | 165 | return false; |
ad46590b | 166 | |
b6a2f15e | 167 | if (p->peer_domain == NULL && p->access == NULL) |
2efeb0b7 | 168 | return true; |
62e76326 | 169 | |
2efeb0b7 | 170 | bool do_ping = false; |
b6a2f15e | 171 | for (d = p->peer_domain; d; d = d->next) { |
cc192b50 | 172 | if (0 == matchDomainName(request->GetHost(), d->domain)) { |
62e76326 | 173 | do_ping = d->do_ping; |
174 | break; | |
175 | } | |
176 | ||
177 | do_ping = !d->do_ping; | |
30a4f2a8 | 178 | } |
62e76326 | 179 | |
2efeb0b7 AJ |
180 | if (p->peer_domain && !do_ping) |
181 | return false; | |
62e76326 | 182 | |
505e35db | 183 | if (p->access == NULL) |
62e76326 | 184 | return do_ping; |
185 | ||
c0941a6a | 186 | ACLFilledChecklist checklist(p->access, request, NULL); |
62e76326 | 187 | |
2efeb0b7 | 188 | return (checklist.fastCheck() == ACCESS_ALLOWED); |
090089c4 | 189 | } |
190 | ||
a3c6762c | 191 | /* Return TRUE if it is okay to send an ICP request to this CachePeer. */ |
62fd6124 | 192 | static int |
a3c6762c | 193 | peerWouldBePinged(const CachePeer * p, HttpRequest * request) |
62fd6124 | 194 | { |
6315602c | 195 | if (p->icp.port == 0) |
62e76326 | 196 | return 0; |
197 | ||
cd196bc8 | 198 | if (p->options.no_query) |
62e76326 | 199 | return 0; |
200 | ||
cd196bc8 | 201 | if (p->options.mcast_responder) |
62e76326 | 202 | return 0; |
203 | ||
83b381d5 | 204 | if (p->n_addresses == 0) |
62e76326 | 205 | return 0; |
206 | ||
6315602c | 207 | if (p->options.background_ping && (squid_curtime - p->stats.last_query < Config.backgroundPingRate)) |
62e76326 | 208 | return 0; |
209 | ||
62fd6124 | 210 | /* the case below seems strange, but can happen if the |
211 | * URL host is on the other side of a firewall */ | |
b69f7771 | 212 | if (p->type == PEER_SIBLING) |
45e5102d | 213 | if (!request->flags.hierarchical) |
62e76326 | 214 | return 0; |
215 | ||
6315602c JGD |
216 | if (!peerAllowedToUse(p, request)) |
217 | return 0; | |
218 | ||
83b381d5 | 219 | /* Ping dead peers every timeout interval */ |
220 | if (squid_curtime - p->stats.last_query > Config.Timeout.deadPeer) | |
62e76326 | 221 | return 1; |
222 | ||
5537c535 | 223 | if (!neighborUp(p)) |
224 | return 0; | |
62e76326 | 225 | |
62fd6124 | 226 | return 1; |
227 | } | |
228 | ||
e8dca475 CT |
229 | bool |
230 | peerCanOpenMore(const CachePeer *p) | |
231 | { | |
232 | const int effectiveLimit = p->max_conn <= 0 ? Squid_MaxFD : p->max_conn; | |
233 | const int remaining = effectiveLimit - p->stats.conn_open; | |
234 | debugs(15, 7, remaining << '=' << effectiveLimit << '-' << p->stats.conn_open); | |
235 | return remaining > 0; | |
236 | } | |
237 | ||
238 | bool | |
239 | peerHasConnAvailable(const CachePeer *p) | |
240 | { | |
241 | // Standby connections can be used without opening new connections. | |
242 | const int standbys = p->standby.pool ? p->standby.pool->count() : 0; | |
243 | ||
244 | // XXX: Some idle pconns can be used without opening new connections. | |
245 | // Complication: Idle pconns cannot be reused for some requests. | |
246 | const int usableIdles = 0; | |
247 | ||
248 | const int available = standbys + usableIdles; | |
249 | debugs(15, 7, available << '=' << standbys << '+' << usableIdles); | |
250 | return available > 0; | |
251 | } | |
252 | ||
253 | void | |
254 | peerConnClosed(CachePeer *p) | |
255 | { | |
256 | --p->stats.conn_open; | |
257 | if (p->standby.waitingForClose && peerCanOpenMore(p)) { | |
258 | p->standby.waitingForClose = false; | |
259 | PeerPoolMgr::Checkpoint(p->standby.mgr, "conn closed"); | |
260 | } | |
261 | } | |
262 | ||
a3c6762c | 263 | /* Return TRUE if it is okay to send an HTTP request to this CachePeer. */ |
8ff4505b | 264 | int |
a3c6762c | 265 | peerHTTPOkay(const CachePeer * p, HttpRequest * request) |
62fd6124 | 266 | { |
e8dca475 CT |
267 | if (!peerCanOpenMore(p) && !peerHasConnAvailable(p)) |
268 | return 0; | |
6315602c | 269 | |
b69f7771 | 270 | if (!peerAllowedToUse(p, request)) |
62e76326 | 271 | return 0; |
272 | ||
b69f7771 | 273 | if (!neighborUp(p)) |
62e76326 | 274 | return 0; |
275 | ||
62fd6124 | 276 | return 1; |
277 | } | |
278 | ||
3c6e634f | 279 | int |
190154cf | 280 | neighborsCount(HttpRequest * request) |
090089c4 | 281 | { |
a3c6762c | 282 | CachePeer *p = NULL; |
090089c4 | 283 | int count = 0; |
62e76326 | 284 | |
40a1495e | 285 | for (p = Config.peers; p; p = p->next) |
62e76326 | 286 | if (peerWouldBePinged(p, request)) |
5db6bf73 | 287 | ++count; |
62e76326 | 288 | |
bf8fe701 | 289 | debugs(15, 3, "neighborsCount: " << count); |
62e76326 | 290 | |
3c6e634f | 291 | return count; |
292 | } | |
090089c4 | 293 | |
a3c6762c | 294 | CachePeer * |
190154cf | 295 | getFirstUpParent(HttpRequest * request) |
090089c4 | 296 | { |
a3c6762c | 297 | CachePeer *p = NULL; |
62e76326 | 298 | |
40a1495e | 299 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 300 | if (!neighborUp(p)) |
301 | continue; | |
302 | ||
303 | if (neighborType(p, request) != PEER_PARENT) | |
304 | continue; | |
305 | ||
306 | if (!peerHTTPOkay(p, request)) | |
307 | continue; | |
308 | ||
309 | break; | |
090089c4 | 310 | } |
62e76326 | 311 | |
bf8fe701 | 312 | debugs(15, 3, "getFirstUpParent: returning " << (p ? p->host : "NULL")); |
b69f7771 | 313 | return p; |
090089c4 | 314 | } |
315 | ||
a3c6762c | 316 | CachePeer * |
190154cf | 317 | getRoundRobinParent(HttpRequest * request) |
48b38d01 | 318 | { |
a3c6762c FC |
319 | CachePeer *p; |
320 | CachePeer *q = NULL; | |
62e76326 | 321 | |
40a1495e | 322 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 323 | if (!p->options.roundrobin) |
324 | continue; | |
325 | ||
326 | if (neighborType(p, request) != PEER_PARENT) | |
327 | continue; | |
328 | ||
329 | if (!peerHTTPOkay(p, request)) | |
330 | continue; | |
331 | ||
1d0bef67 | 332 | if (p->weight == 0) |
0d5a2006 | 333 | continue; |
1d0bef67 AJ |
334 | |
335 | if (q) { | |
336 | if (p->weight == q->weight) { | |
337 | if (q->rr_count < p->rr_count) | |
338 | continue; | |
2d3d0b4e | 339 | } else if ( ((double) q->rr_count / q->weight) < ((double) p->rr_count / p->weight)) { |
1d0bef67 AJ |
340 | continue; |
341 | } | |
0d5a2006 | 342 | } |
62e76326 | 343 | |
344 | q = p; | |
48b38d01 | 345 | } |
62e76326 | 346 | |
b69f7771 | 347 | if (q) |
5db6bf73 | 348 | ++ q->rr_count; |
62e76326 | 349 | |
1d0bef67 | 350 | debugs(15, 3, HERE << "returning " << (q ? q->host : "NULL")); |
62e76326 | 351 | |
b69f7771 | 352 | return q; |
48b38d01 | 353 | } |
354 | ||
a3c6762c | 355 | CachePeer * |
190154cf | 356 | getWeightedRoundRobinParent(HttpRequest * request) |
d1b63fc8 | 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 | ||
366 | if (neighborType(p, request) != PEER_PARENT) | |
367 | continue; | |
368 | ||
369 | if (!peerHTTPOkay(p, request)) | |
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 | ||
383 | if (neighborType(p, request) != PEER_PARENT) | |
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 * |
190154cf | 471 | getDefaultParent(HttpRequest * request) |
5269d0bd | 472 | { |
a3c6762c | 473 | CachePeer *p = NULL; |
62e76326 | 474 | |
40a1495e | 475 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 476 | if (neighborType(p, request) != PEER_PARENT) |
477 | continue; | |
478 | ||
479 | if (!p->options.default_parent) | |
480 | continue; | |
481 | ||
482 | if (!peerHTTPOkay(p, request)) | |
483 | continue; | |
484 | ||
bf8fe701 | 485 | debugs(15, 3, "getDefaultParent: returning " << p->host); |
62e76326 | 486 | |
487 | return p; | |
5269d0bd | 488 | } |
62e76326 | 489 | |
bf8fe701 | 490 | debugs(15, 3, "getDefaultParent: returning NULL"); |
5269d0bd | 491 | return NULL; |
492 | } | |
493 | ||
a3c6762c FC |
494 | CachePeer * |
495 | getNextPeer(CachePeer * p) | |
090089c4 | 496 | { |
b69f7771 | 497 | return p->next; |
090089c4 | 498 | } |
499 | ||
a3c6762c | 500 | CachePeer * |
deb79f06 | 501 | getFirstPeer(void) |
090089c4 | 502 | { |
40a1495e | 503 | return Config.peers; |
090089c4 | 504 | } |
505 | ||
b8d8561b | 506 | static void |
a3c6762c | 507 | neighborRemove(CachePeer * target) |
30a4f2a8 | 508 | { |
a3c6762c FC |
509 | CachePeer *p = NULL; |
510 | CachePeer **P = NULL; | |
40a1495e | 511 | p = Config.peers; |
512 | P = &Config.peers; | |
62e76326 | 513 | |
b69f7771 | 514 | while (p) { |
62e76326 | 515 | if (target == p) |
516 | break; | |
517 | ||
518 | P = &p->next; | |
519 | ||
520 | p = p->next; | |
b69f7771 | 521 | } |
62e76326 | 522 | |
b69f7771 | 523 | if (p) { |
62e76326 | 524 | *P = p->next; |
525 | cbdataFree(p); | |
5e263176 | 526 | --Config.npeers; |
4d64d74a | 527 | } |
62e76326 | 528 | |
40a1495e | 529 | first_ping = Config.peers; |
4d64d74a | 530 | } |
531 | ||
5f5e883f FC |
532 | static void |
533 | neighborsRegisterWithCacheManager() | |
534 | { | |
8822ebee | 535 | Mgr::RegisterAction("server_list", |
d9fc6862 A |
536 | "Peer Cache Statistics", |
537 | neighborDumpPeers, 0, 1); | |
5f5e883f | 538 | |
e0d28505 | 539 | if (Comm::IsConnOpen(icpIncomingConn)) { |
8822ebee | 540 | Mgr::RegisterAction("non_peers", |
d9fc6862 A |
541 | "List of Unknown sites sending ICP messages", |
542 | neighborDumpNonPeers, 0, 1); | |
5f5e883f FC |
543 | } |
544 | } | |
545 | ||
b8d8561b | 546 | void |
a86029b9 | 547 | neighbors_init(void) |
090089c4 | 548 | { |
30a4f2a8 | 549 | struct servent *sep = NULL; |
b263bd3f | 550 | const char *me = getMyHostname(); |
a3c6762c FC |
551 | CachePeer *thisPeer = NULL; |
552 | CachePeer *next = NULL; | |
62e76326 | 553 | |
6fdc2d18 FC |
554 | neighborsRegisterWithCacheManager(); |
555 | ||
e0d28505 | 556 | if (Comm::IsConnOpen(icpIncomingConn)) { |
62e76326 | 557 | |
558 | for (thisPeer = Config.peers; thisPeer; thisPeer = next) { | |
62e76326 | 559 | next = thisPeer->next; |
560 | ||
561 | if (0 != strcmp(thisPeer->host, me)) | |
562 | continue; | |
563 | ||
fa720bfb | 564 | for (AnyP::PortCfgPointer s = HttpPortList; s != NULL; s = s->next) { |
4dd643d5 | 565 | if (thisPeer->http_port != s->s.port()) |
62e76326 | 566 | continue; |
567 | ||
27774cee | 568 | debugs(15, DBG_IMPORTANT, "WARNING: Peer looks like this host"); |
bf8fe701 | 569 | |
27774cee | 570 | debugs(15, DBG_IMPORTANT, " Ignoring " << |
bf8fe701 | 571 | neighborTypeStr(thisPeer) << " " << thisPeer->host << |
572 | "/" << thisPeer->http_port << "/" << | |
573 | thisPeer->icp.port); | |
62e76326 | 574 | |
62e76326 | 575 | neighborRemove(thisPeer); |
576 | } | |
577 | } | |
b263bd3f | 578 | } |
62e76326 | 579 | |
5999b776 | 580 | peerRefreshDNS((void *) 1); |
62e76326 | 581 | |
9ca56f05 | 582 | sep = getservbyname("echo", "udp"); |
f45dd259 | 583 | echo_port = sep ? ntohs((unsigned short) sep->s_port) : 7; |
62e76326 | 584 | |
c68e4e90 | 585 | first_ping = Config.peers; |
62ee09ca | 586 | } |
587 | ||
b8d8561b | 588 | int |
190154cf | 589 | neighborsUdpPing(HttpRequest * request, |
62e76326 | 590 | StoreEntry * entry, |
591 | IRCB * callback, | |
592 | void *callback_data, | |
593 | int *exprep, | |
594 | int *timeout) | |
090089c4 | 595 | { |
3900307b | 596 | const char *url = entry->url(); |
b6c0e933 | 597 | MemObject *mem = entry->mem_obj; |
a3c6762c | 598 | CachePeer *p = NULL; |
090089c4 | 599 | int i; |
1061b406 | 600 | int reqnum = 0; |
6d2296d4 | 601 | int flags; |
9dee2904 | 602 | icp_common_t *query; |
429fdbec | 603 | int queries_sent = 0; |
0a0bf5db | 604 | int peers_pinged = 0; |
a8c926ff | 605 | int parent_timeout = 0, parent_exprep = 0; |
606 | int sibling_timeout = 0, sibling_exprep = 0; | |
1bf2cd49 | 607 | int mcast_timeout = 0, mcast_exprep = 0; |
090089c4 | 608 | |
40a1495e | 609 | if (Config.peers == NULL) |
62e76326 | 610 | return 0; |
611 | ||
9fb13bb6 | 612 | assert(entry->swap_status == SWAPOUT_NONE); |
62e76326 | 613 | |
b6c0e933 | 614 | mem->start_ping = current_time; |
62e76326 | 615 | |
b4e7f82d | 616 | mem->ping_reply_callback = callback; |
62e76326 | 617 | |
b6c0e933 | 618 | mem->ircb_data = callback_data; |
62e76326 | 619 | |
332dafa2 | 620 | reqnum = icpSetCacheKey((const cache_key *)entry->key); |
62e76326 | 621 | |
40a1495e | 622 | for (i = 0, p = first_ping; i++ < Config.npeers; p = p->next) { |
62e76326 | 623 | if (p == NULL) |
624 | p = Config.peers; | |
625 | ||
bf8fe701 | 626 | debugs(15, 5, "neighborsUdpPing: Peer " << p->host); |
62e76326 | 627 | |
628 | if (!peerWouldBePinged(p, request)) | |
f53969cc | 629 | continue; /* next CachePeer */ |
62e76326 | 630 | |
5db6bf73 | 631 | ++peers_pinged; |
62e76326 | 632 | |
bf8fe701 | 633 | debugs(15, 4, "neighborsUdpPing: pinging peer " << p->host << " for '" << url << "'"); |
62e76326 | 634 | |
bf8fe701 | 635 | debugs(15, 3, "neighborsUdpPing: key = '" << entry->getMD5Text() << "'"); |
62e76326 | 636 | |
bf8fe701 | 637 | debugs(15, 3, "neighborsUdpPing: reqnum = " << reqnum); |
090089c4 | 638 | |
dc9d133b | 639 | #if USE_HTCP |
4f4fa815 | 640 | if (p->options.htcp && !p->options.htcp_only_clr) { |
bebf08ff AJ |
641 | if (Config.Port.htcp <= 0) { |
642 | debugs(15, DBG_CRITICAL, "HTCP is disabled! Cannot send HTCP request to peer."); | |
643 | continue; | |
644 | } | |
645 | ||
bf8fe701 | 646 | debugs(15, 3, "neighborsUdpPing: sending HTCP query"); |
65d448bc AJ |
647 | if (htcpQuery(entry, request, p) <= 0) |
648 | continue; // unable to send. | |
62e76326 | 649 | } else |
dc9d133b | 650 | #endif |
bebf08ff | 651 | { |
e0d28505 | 652 | if (Config.Port.icp <= 0 || !Comm::IsConnOpen(icpOutgoingConn)) { |
bebf08ff AJ |
653 | debugs(15, DBG_CRITICAL, "ICP is disabled! Cannot send ICP request to peer."); |
654 | continue; | |
62e76326 | 655 | } else { |
62e76326 | 656 | |
bebf08ff | 657 | if (p->type == PEER_MULTICAST) |
e0d28505 | 658 | mcastSetTtl(icpOutgoingConn->fd, p->mcast.ttl); |
bebf08ff AJ |
659 | |
660 | if (p->icp.port == echo_port) { | |
661 | debugs(15, 4, "neighborsUdpPing: Looks like a dumb cache, send DECHO ping"); | |
bebf08ff | 662 | query = _icp_common_t::createMessage(ICP_DECHO, 0, url, reqnum, 0); |
e0d28505 | 663 | icpUdpSend(icpOutgoingConn->fd, p->in_addr, query, LOG_ICP_QUERY, 0); |
bebf08ff AJ |
664 | } else { |
665 | flags = 0; | |
62e76326 | 666 | |
bebf08ff AJ |
667 | if (Config.onoff.query_icmp) |
668 | if (p->icp.version == ICP_VERSION_2) | |
669 | flags |= ICP_FLAG_SRC_RTT; | |
62e76326 | 670 | |
bebf08ff AJ |
671 | query = _icp_common_t::createMessage(ICP_QUERY, flags, url, reqnum, 0); |
672 | ||
01bd87d8 | 673 | icpUdpSend(icpOutgoingConn->fd, p->in_addr, query, LOG_ICP_QUERY, 0.0); |
bebf08ff | 674 | } |
62e76326 | 675 | } |
bebf08ff | 676 | } |
62e76326 | 677 | |
5db6bf73 | 678 | ++queries_sent; |
62e76326 | 679 | |
5db6bf73 | 680 | ++ p->stats.pings_sent; |
62e76326 | 681 | |
682 | if (p->type == PEER_MULTICAST) { | |
1bf2cd49 | 683 | mcast_exprep += p->mcast.n_replies_expected; |
684 | mcast_timeout += (p->stats.rtt * p->mcast.n_replies_expected); | |
62e76326 | 685 | } else if (neighborUp(p)) { |
686 | /* its alive, expect a reply from it */ | |
687 | ||
688 | if (neighborType(p, request) == PEER_PARENT) { | |
5db6bf73 | 689 | ++parent_exprep; |
62e76326 | 690 | parent_timeout += p->stats.rtt; |
691 | } else { | |
5db6bf73 | 692 | ++sibling_exprep; |
62e76326 | 693 | sibling_timeout += p->stats.rtt; |
694 | } | |
695 | } else { | |
696 | /* Neighbor is dead; ping it anyway, but don't expect a reply */ | |
697 | /* log it once at the threshold */ | |
698 | ||
699 | if (p->stats.logged_state == PEER_ALIVE) { | |
e0236918 | 700 | debugs(15, DBG_IMPORTANT, "Detected DEAD " << neighborTypeStr(p) << ": " << p->name); |
62e76326 | 701 | p->stats.logged_state = PEER_DEAD; |
702 | } | |
703 | } | |
704 | ||
705 | p->stats.last_query = squid_curtime; | |
706 | ||
67c8308c | 707 | /* |
a3c6762c FC |
708 | * keep probe_start == 0 for a multicast CachePeer, |
709 | * so neighborUp() never says this CachePeer is dead. | |
67c8308c | 710 | */ |
711 | ||
712 | if ((p->type != PEER_MULTICAST) && (p->stats.probe_start == 0)) | |
62e76326 | 713 | p->stats.probe_start = squid_curtime; |
090089c4 | 714 | } |
62e76326 | 715 | |
40a1495e | 716 | if ((first_ping = first_ping->next) == NULL) |
62e76326 | 717 | first_ping = Config.peers; |
090089c4 | 718 | |
a8c926ff | 719 | /* |
720 | * How many replies to expect? | |
721 | */ | |
1bf2cd49 | 722 | *exprep = parent_exprep + sibling_exprep + mcast_exprep; |
a8c926ff | 723 | |
52040193 | 724 | /* |
465dc415 | 725 | * If there is a configured timeout, use it |
52040193 | 726 | */ |
465dc415 | 727 | if (Config.Timeout.icp_query) |
62e76326 | 728 | *timeout = Config.Timeout.icp_query; |
28993292 | 729 | else { |
62e76326 | 730 | if (*exprep > 0) { |
731 | if (parent_exprep) | |
732 | *timeout = 2 * parent_timeout / parent_exprep; | |
1bf2cd49 | 733 | else if (mcast_exprep) |
734 | *timeout = 2 * mcast_timeout / mcast_exprep; | |
62e76326 | 735 | else |
736 | *timeout = 2 * sibling_timeout / sibling_exprep; | |
737 | } else | |
f53969cc | 738 | *timeout = 2000; /* 2 seconds */ |
62e76326 | 739 | |
740 | if (Config.Timeout.icp_query_max) | |
741 | if (*timeout > Config.Timeout.icp_query_max) | |
742 | *timeout = Config.Timeout.icp_query_max; | |
743 | ||
744 | if (*timeout < Config.Timeout.icp_query_min) | |
745 | *timeout = Config.Timeout.icp_query_min; | |
28993292 | 746 | } |
62e76326 | 747 | |
0a0bf5db | 748 | return peers_pinged; |
090089c4 | 749 | } |
750 | ||
a3c6762c | 751 | /* lookup the digest of a given CachePeer */ |
26b164ac | 752 | lookup_t |
a3c6762c | 753 | peerDigestLookup(CachePeer * p, HttpRequest * request) |
26b164ac | 754 | { |
6cfa8966 | 755 | #if USE_CACHE_DIGESTS |
f66a9ef4 | 756 | const cache_key *key = request ? storeKeyPublicByRequest(request) : NULL; |
26b164ac | 757 | assert(p); |
0c511722 | 758 | assert(request); |
bf8fe701 | 759 | debugs(15, 5, "peerDigestLookup: peer " << p->host); |
4b4cd312 | 760 | /* does the peeer have a valid digest? */ |
62e76326 | 761 | |
e13ee7ad | 762 | if (!p->digest) { |
bf8fe701 | 763 | debugs(15, 5, "peerDigestLookup: gone!"); |
62e76326 | 764 | return LOOKUP_NONE; |
6755df2e | 765 | } else if (!peerHTTPOkay(p, request)) { |
bf8fe701 | 766 | debugs(15, 5, "peerDigestLookup: !peerHTTPOkay"); |
6755df2e | 767 | return LOOKUP_NONE; |
e13ee7ad | 768 | } else if (!p->digest->flags.needed) { |
bf8fe701 | 769 | debugs(15, 5, "peerDigestLookup: note need"); |
62e76326 | 770 | peerDigestNeeded(p->digest); |
771 | return LOOKUP_NONE; | |
4ed0e075 | 772 | } else if (!p->digest->flags.usable) { |
bf8fe701 | 773 | debugs(15, 5, "peerDigestLookup: !ready && " << (p->digest->flags.requested ? "" : "!") << "requested"); |
62e76326 | 774 | return LOOKUP_NONE; |
26b164ac | 775 | } |
62e76326 | 776 | |
bf8fe701 | 777 | debugs(15, 5, "peerDigestLookup: OK to lookup peer " << p->host); |
e13ee7ad | 778 | assert(p->digest->cd); |
26b164ac | 779 | /* does digest predict a hit? */ |
62e76326 | 780 | |
e13ee7ad | 781 | if (!cacheDigestTest(p->digest->cd, key)) |
62e76326 | 782 | return LOOKUP_MISS; |
783 | ||
bf8fe701 | 784 | debugs(15, 5, "peerDigestLookup: peer " << p->host << " says HIT!"); |
62e76326 | 785 | |
26b164ac | 786 | return LOOKUP_HIT; |
62e76326 | 787 | |
26b164ac | 788 | #endif |
62e76326 | 789 | |
26b164ac | 790 | return LOOKUP_NONE; |
791 | } | |
792 | ||
a3c6762c FC |
793 | /* select best CachePeer based on cache digests */ |
794 | CachePeer * | |
190154cf | 795 | neighborsDigestSelect(HttpRequest * request) |
a54d3f8e | 796 | { |
a3c6762c | 797 | CachePeer *best_p = NULL; |
6cfa8966 | 798 | #if USE_CACHE_DIGESTS |
62e76326 | 799 | |
a54d3f8e | 800 | int best_rtt = 0; |
801 | int choice_count = 0; | |
802 | int ichoice_count = 0; | |
a3c6762c | 803 | CachePeer *p; |
a54d3f8e | 804 | int p_rtt; |
805 | int i; | |
62e76326 | 806 | |
45e5102d | 807 | if (!request->flags.hierarchical) |
62e76326 | 808 | return NULL; |
809 | ||
e91e2a72 | 810 | storeKeyPublicByRequest(request); |
62e76326 | 811 | |
a54d3f8e | 812 | for (i = 0, p = first_ping; i++ < Config.npeers; p = p->next) { |
62e76326 | 813 | lookup_t lookup; |
814 | ||
815 | if (!p) | |
816 | p = Config.peers; | |
817 | ||
818 | if (i == 1) | |
819 | first_ping = p; | |
820 | ||
821 | lookup = peerDigestLookup(p, request); | |
822 | ||
823 | if (lookup == LOOKUP_NONE) | |
824 | continue; | |
825 | ||
5db6bf73 | 826 | ++choice_count; |
62e76326 | 827 | |
828 | if (lookup == LOOKUP_MISS) | |
829 | continue; | |
830 | ||
831 | p_rtt = netdbHostRtt(p->host); | |
832 | ||
bf8fe701 | 833 | debugs(15, 5, "neighborsDigestSelect: peer " << p->host << " rtt: " << p_rtt); |
62e76326 | 834 | |
a3c6762c | 835 | /* is this CachePeer better than others in terms of rtt ? */ |
62e76326 | 836 | if (!best_p || (p_rtt && p_rtt < best_rtt)) { |
837 | best_p = p; | |
838 | best_rtt = p_rtt; | |
839 | ||
f53969cc | 840 | if (p_rtt) /* informative choice (aka educated guess) */ |
5db6bf73 | 841 | ++ichoice_count; |
62e76326 | 842 | |
bf8fe701 | 843 | debugs(15, 4, "neighborsDigestSelect: peer " << p->host << " leads with rtt " << best_rtt); |
62e76326 | 844 | } |
a54d3f8e | 845 | } |
62e76326 | 846 | |
bf8fe701 | 847 | debugs(15, 4, "neighborsDigestSelect: choices: " << choice_count << " (" << ichoice_count << ")"); |
26b164ac | 848 | peerNoteDigestLookup(request, best_p, |
62e76326 | 849 | best_p ? LOOKUP_HIT : (choice_count ? LOOKUP_MISS : LOOKUP_NONE)); |
a54d3f8e | 850 | request->hier.n_choices = choice_count; |
851 | request->hier.n_ichoices = ichoice_count; | |
852 | #endif | |
62e76326 | 853 | |
a54d3f8e | 854 | return best_p; |
855 | } | |
856 | ||
26b164ac | 857 | void |
a3c6762c | 858 | peerNoteDigestLookup(HttpRequest * request, CachePeer * p, lookup_t lookup) |
26b164ac | 859 | { |
6cfa8966 | 860 | #if USE_CACHE_DIGESTS |
26b164ac | 861 | if (p) |
0a84e4fb | 862 | strncpy(request->hier.cd_host, p->host, sizeof(request->hier.cd_host)-1); |
26b164ac | 863 | else |
62e76326 | 864 | *request->hier.cd_host = '\0'; |
865 | ||
26b164ac | 866 | request->hier.cd_lookup = lookup; |
4b981814 | 867 | debugs(15, 4, "peerNoteDigestLookup: peer " << (p? p->host : "<none>") << ", lookup: " << lookup_t_str[lookup] ); |
26b164ac | 868 | #endif |
869 | } | |
870 | ||
d73844ca | 871 | static void |
ced8def3 | 872 | neighborAlive(CachePeer * p, const MemObject *, const icp_common_t * header) |
4eda6afe | 873 | { |
32a47e3e | 874 | peerAlive(p); |
5db6bf73 | 875 | ++ p->stats.pings_acked; |
62e76326 | 876 | |
27cd7235 | 877 | if ((icp_opcode) header->opcode <= ICP_END) |
5db6bf73 | 878 | ++ p->icp.counts[header->opcode]; |
62e76326 | 879 | |
44f2f2e4 | 880 | p->icp.version = (int) header->version; |
881 | } | |
882 | ||
883 | static void | |
a3c6762c | 884 | neighborUpdateRtt(CachePeer * p, MemObject * mem) |
44f2f2e4 | 885 | { |
d1b63fc8 | 886 | int rtt, rtt_av_factor; |
62e76326 | 887 | |
d2cd6935 | 888 | if (!mem) |
62e76326 | 889 | return; |
890 | ||
44f2f2e4 | 891 | if (!mem->start_ping.tv_sec) |
62e76326 | 892 | return; |
893 | ||
44f2f2e4 | 894 | rtt = tvSubMsec(mem->start_ping, current_time); |
62e76326 | 895 | |
1b6ef2d2 | 896 | if (rtt < 1 || rtt > 10000) |
62e76326 | 897 | return; |
898 | ||
d1b63fc8 | 899 | rtt_av_factor = RTT_AV_FACTOR; |
62e76326 | 900 | |
d1b63fc8 | 901 | if (p->options.weighted_roundrobin) |
62e76326 | 902 | rtt_av_factor = RTT_BACKGROUND_AV_FACTOR; |
903 | ||
a98bcbee | 904 | p->stats.rtt = Math::intAverage(p->stats.rtt, rtt, p->stats.pings_acked, rtt_av_factor); |
4eda6afe | 905 | } |
090089c4 | 906 | |
399cabec | 907 | #if USE_HTCP |
908 | static void | |
ced8def3 | 909 | neighborAliveHtcp(CachePeer * p, const MemObject *, const HtcpReplyData * htcp) |
399cabec | 910 | { |
32a47e3e | 911 | peerAlive(p); |
5db6bf73 FC |
912 | ++ p->stats.pings_acked; |
913 | ++ p->htcp.counts[htcp->hit ? 1 : 0]; | |
44f2f2e4 | 914 | p->htcp.version = htcp->version; |
399cabec | 915 | } |
62e76326 | 916 | |
399cabec | 917 | #endif |
918 | ||
38792624 | 919 | static void |
a3c6762c | 920 | neighborCountIgnored(CachePeer * p) |
a7e59001 | 921 | { |
b69f7771 | 922 | if (p == NULL) |
62e76326 | 923 | return; |
924 | ||
5db6bf73 | 925 | ++ p->stats.ignored_replies; |
62e76326 | 926 | |
5db6bf73 | 927 | ++NLateReplies; |
a7e59001 | 928 | } |
929 | ||
a3c6762c | 930 | static CachePeer *non_peers = NULL; |
e102ebda | 931 | |
932 | static void | |
b7ac5457 | 933 | neighborIgnoreNonPeer(const Ip::Address &from, icp_opcode opcode) |
e102ebda | 934 | { |
a3c6762c | 935 | CachePeer *np; |
62e76326 | 936 | |
26ac0430 | 937 | for (np = non_peers; np; np = np->next) { |
cc192b50 | 938 | if (np->in_addr != from) |
62e76326 | 939 | continue; |
940 | ||
4dd643d5 | 941 | if (np->in_addr.port() != from.port()) |
62e76326 | 942 | continue; |
943 | ||
944 | break; | |
e102ebda | 945 | } |
62e76326 | 946 | |
26ac0430 | 947 | if (np == NULL) { |
a3c6762c | 948 | np = (CachePeer *)xcalloc(1, sizeof(CachePeer)); |
cc192b50 | 949 | np->in_addr = from; |
4dd643d5 | 950 | np->icp.port = from.port(); |
62e76326 | 951 | np->type = PEER_NONE; |
cc192b50 | 952 | np->host = new char[MAX_IPSTRLEN]; |
4dd643d5 | 953 | from.toStr(np->host,MAX_IPSTRLEN); |
62e76326 | 954 | np->next = non_peers; |
955 | non_peers = np; | |
e102ebda | 956 | } |
62e76326 | 957 | |
5db6bf73 | 958 | ++ np->icp.counts[opcode]; |
62e76326 | 959 | |
e4cc2fdf | 960 | if (isPowTen(++np->stats.ignored_replies)) |
e0236918 | 961 | debugs(15, DBG_IMPORTANT, "WARNING: Ignored " << np->stats.ignored_replies << " replies from non-peer " << np->host); |
e102ebda | 962 | } |
963 | ||
429fdbec | 964 | /* ignoreMulticastReply |
26ac0430 | 965 | * |
d6827718 | 966 | * * We want to ignore replies from multicast peers if the |
a3c6762c | 967 | * * cache_host_domain rules would normally prevent the CachePeer |
d6827718 | 968 | * * from being used |
429fdbec | 969 | */ |
970 | static int | |
a3c6762c | 971 | ignoreMulticastReply(CachePeer * p, MemObject * mem) |
429fdbec | 972 | { |
b69f7771 | 973 | if (p == NULL) |
62e76326 | 974 | return 0; |
975 | ||
cd196bc8 | 976 | if (!p->options.mcast_responder) |
62e76326 | 977 | return 0; |
978 | ||
b69f7771 | 979 | if (peerHTTPOkay(p, mem->request)) |
62e76326 | 980 | return 0; |
981 | ||
429fdbec | 982 | return 1; |
983 | } | |
984 | ||
4b981814 AJ |
985 | /** |
986 | * I should attach these records to the entry. We take the first | |
429fdbec | 987 | * hit we get our wait until everyone misses. The timeout handler |
988 | * call needs to nip this shopping list or call one of the misses. | |
26ac0430 | 989 | * |
429fdbec | 990 | * If a hit process is already started, then sobeit |
991 | */ | |
b8d8561b | 992 | void |
b7ac5457 | 993 | neighborsUdpAck(const cache_key * key, icp_common_t * header, const Ip::Address &from) |
090089c4 | 994 | { |
a3c6762c | 995 | CachePeer *p = NULL; |
5ad33356 | 996 | StoreEntry *entry; |
997 | MemObject *mem = NULL; | |
b6c0e933 | 998 | peer_t ntype = PEER_NONE; |
a7e59001 | 999 | icp_opcode opcode = (icp_opcode) header->opcode; |
090089c4 | 1000 | |
4a7a3d56 | 1001 | debugs(15, 6, "neighborsUdpAck: opcode " << opcode << " '" << storeKeyText(key) << "'"); |
62e76326 | 1002 | |
c8f4eac4 | 1003 | if (NULL != (entry = Store::Root().get(key))) |
62e76326 | 1004 | mem = entry->mem_obj; |
1005 | ||
b69f7771 | 1006 | if ((p = whichPeer(from))) |
62e76326 | 1007 | neighborAlive(p, mem, header); |
1008 | ||
27cd7235 | 1009 | if (opcode > ICP_END) |
62e76326 | 1010 | return; |
1011 | ||
4b981814 | 1012 | const char *opcode_d = icp_opcode_str[opcode]; |
62e76326 | 1013 | |
41587298 | 1014 | if (p) |
62e76326 | 1015 | neighborUpdateRtt(p, mem); |
1016 | ||
5ad33356 | 1017 | /* Does the entry exist? */ |
26ac0430 | 1018 | if (NULL == entry) { |
bf8fe701 | 1019 | debugs(12, 3, "neighborsUdpAck: Cache key '" << storeKeyText(key) << "' not found"); |
62e76326 | 1020 | neighborCountIgnored(p); |
1021 | return; | |
5ad33356 | 1022 | } |
62e76326 | 1023 | |
2d1c6a4f | 1024 | /* check if someone is already fetching it */ |
26ac0430 | 1025 | if (EBIT_TEST(entry->flags, ENTRY_DISPATCHED)) { |
bf8fe701 | 1026 | debugs(15, 3, "neighborsUdpAck: '" << storeKeyText(key) << "' already being fetched."); |
62e76326 | 1027 | neighborCountIgnored(p); |
1028 | return; | |
d2af9477 | 1029 | } |
62e76326 | 1030 | |
26ac0430 | 1031 | if (mem == NULL) { |
bf8fe701 | 1032 | debugs(15, 2, "Ignoring " << opcode_d << " for missing mem_obj: " << storeKeyText(key)); |
62e76326 | 1033 | neighborCountIgnored(p); |
1034 | return; | |
8de2f7ad | 1035 | } |
62e76326 | 1036 | |
26ac0430 | 1037 | if (entry->ping_status != PING_WAITING) { |
bf8fe701 | 1038 | debugs(15, 2, "neighborsUdpAck: Late " << opcode_d << " for " << storeKeyText(key)); |
62e76326 | 1039 | neighborCountIgnored(p); |
1040 | return; | |
8de2f7ad | 1041 | } |
62e76326 | 1042 | |
1bfe9ade | 1043 | if (!entry->locked()) { |
5bd484b5 | 1044 | // TODO: many entries are unlocked; why is this reported at level 1? |
e0236918 | 1045 | debugs(12, DBG_IMPORTANT, "neighborsUdpAck: '" << storeKeyText(key) << "' has no locks"); |
62e76326 | 1046 | neighborCountIgnored(p); |
1047 | return; | |
090089c4 | 1048 | } |
62e76326 | 1049 | |
bf8fe701 | 1050 | debugs(15, 3, "neighborsUdpAck: " << opcode_d << " for '" << storeKeyText(key) << "' from " << (p ? p->host : "source") << " "); |
62e76326 | 1051 | |
26ac0430 | 1052 | if (p) { |
62e76326 | 1053 | ntype = neighborType(p, mem->request); |
44f2f2e4 | 1054 | } |
62e76326 | 1055 | |
26ac0430 | 1056 | if (ignoreMulticastReply(p, mem)) { |
62e76326 | 1057 | neighborCountIgnored(p); |
26ac0430 | 1058 | } else if (opcode == ICP_MISS) { |
62e76326 | 1059 | if (p == NULL) { |
1060 | neighborIgnoreNonPeer(from, opcode); | |
1061 | } else { | |
0c3d3f65 | 1062 | mem->ping_reply_callback(p, ntype, AnyP::PROTO_ICP, header, mem->ircb_data); |
62e76326 | 1063 | } |
26ac0430 | 1064 | } else if (opcode == ICP_HIT) { |
62e76326 | 1065 | if (p == NULL) { |
1066 | neighborIgnoreNonPeer(from, opcode); | |
1067 | } else { | |
1068 | header->opcode = ICP_HIT; | |
0c3d3f65 | 1069 | mem->ping_reply_callback(p, ntype, AnyP::PROTO_ICP, header, mem->ircb_data); |
62e76326 | 1070 | } |
26ac0430 | 1071 | } else if (opcode == ICP_DECHO) { |
62e76326 | 1072 | if (p == NULL) { |
1073 | neighborIgnoreNonPeer(from, opcode); | |
1074 | } else if (ntype == PEER_SIBLING) { | |
1075 | debug_trap("neighborsUdpAck: Found non-ICP cache as SIBLING\n"); | |
1076 | debug_trap("neighborsUdpAck: non-ICP neighbors must be a PARENT\n"); | |
1077 | } else { | |
0c3d3f65 | 1078 | mem->ping_reply_callback(p, ntype, AnyP::PROTO_ICP, header, mem->ircb_data); |
62e76326 | 1079 | } |
26ac0430 | 1080 | } else if (opcode == ICP_SECHO) { |
62e76326 | 1081 | if (p) { |
e0236918 | 1082 | debugs(15, DBG_IMPORTANT, "Ignoring SECHO from neighbor " << p->host); |
62e76326 | 1083 | neighborCountIgnored(p); |
62e76326 | 1084 | } else { |
e0236918 | 1085 | debugs(15, DBG_IMPORTANT, "Unsolicited SECHO from " << from); |
62e76326 | 1086 | } |
26ac0430 | 1087 | } else if (opcode == ICP_DENIED) { |
62e76326 | 1088 | if (p == NULL) { |
1089 | neighborIgnoreNonPeer(from, opcode); | |
1090 | } else if (p->stats.pings_acked > 100) { | |
1091 | if (100 * p->icp.counts[ICP_DENIED] / p->stats.pings_acked > 95) { | |
fa84c01d FC |
1092 | debugs(15, DBG_CRITICAL, "95%% of replies from '" << p->host << "' are UDP_DENIED"); |
1093 | debugs(15, DBG_CRITICAL, "Disabling '" << p->host << "', please check your configuration."); | |
62e76326 | 1094 | neighborRemove(p); |
1095 | p = NULL; | |
1096 | } else { | |
1097 | neighborCountIgnored(p); | |
1098 | } | |
1099 | } | |
26ac0430 | 1100 | } else if (opcode == ICP_MISS_NOFETCH) { |
0c3d3f65 | 1101 | mem->ping_reply_callback(p, ntype, AnyP::PROTO_ICP, header, mem->ircb_data); |
26ac0430 | 1102 | } else { |
fa84c01d | 1103 | debugs(15, DBG_CRITICAL, "neighborsUdpAck: Unexpected ICP reply: " << opcode_d); |
d2af9477 | 1104 | } |
090089c4 | 1105 | } |
1106 | ||
a3c6762c | 1107 | CachePeer * |
40a1495e | 1108 | peerFindByName(const char *name) |
98ffb7e4 | 1109 | { |
a3c6762c | 1110 | CachePeer *p = NULL; |
62e76326 | 1111 | |
40a1495e | 1112 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 1113 | if (!strcasecmp(name, p->name)) |
1114 | break; | |
98ffb7e4 | 1115 | } |
62e76326 | 1116 | |
b69f7771 | 1117 | return p; |
98ffb7e4 | 1118 | } |
b012353a | 1119 | |
a3c6762c | 1120 | CachePeer * |
db1cd23c | 1121 | peerFindByNameAndPort(const char *name, unsigned short port) |
1122 | { | |
a3c6762c | 1123 | CachePeer *p = NULL; |
62e76326 | 1124 | |
db1cd23c | 1125 | for (p = Config.peers; p; p = p->next) { |
62e76326 | 1126 | if (strcasecmp(name, p->name)) |
1127 | continue; | |
1128 | ||
1129 | if (port != p->http_port) | |
1130 | continue; | |
1131 | ||
1132 | break; | |
db1cd23c | 1133 | } |
62e76326 | 1134 | |
db1cd23c | 1135 | return p; |
1136 | } | |
1137 | ||
5269d0bd | 1138 | int |
a3c6762c | 1139 | neighborUp(const CachePeer * p) |
5269d0bd | 1140 | { |
eb406bb7 | 1141 | if (!p->tcp_up) { |
a3c6762c | 1142 | if (!peerProbeConnect((CachePeer *) p)) { |
cc192b50 | 1143 | debugs(15, 8, "neighborUp: DOWN (probed): " << p->host << " (" << p->in_addr << ")"); |
4ed0e075 | 1144 | return 0; |
cc192b50 | 1145 | } |
eb406bb7 | 1146 | } |
62e76326 | 1147 | |
64b8103b | 1148 | /* |
a3c6762c | 1149 | * The CachePeer can not be UP if we don't have any IP addresses |
26ac0430 | 1150 | * for it. |
64b8103b | 1151 | */ |
cc192b50 | 1152 | if (0 == p->n_addresses) { |
1153 | debugs(15, 8, "neighborUp: DOWN (no-ip): " << p->host << " (" << p->in_addr << ")"); | |
62e76326 | 1154 | return 0; |
cc192b50 | 1155 | } |
62e76326 | 1156 | |
cc192b50 | 1157 | if (p->options.no_query) { |
1158 | debugs(15, 8, "neighborUp: UP (no-query): " << p->host << " (" << p->in_addr << ")"); | |
67c8308c | 1159 | return 1; |
cc192b50 | 1160 | } |
67c8308c | 1161 | |
1162 | if (p->stats.probe_start != 0 && | |
cc192b50 | 1163 | squid_curtime - p->stats.probe_start > Config.Timeout.deadPeer) { |
1164 | debugs(15, 8, "neighborUp: DOWN (dead): " << p->host << " (" << p->in_addr << ")"); | |
67c8308c | 1165 | return 0; |
cc192b50 | 1166 | } |
67c8308c | 1167 | |
cc192b50 | 1168 | debugs(15, 8, "neighborUp: UP: " << p->host << " (" << p->in_addr << ")"); |
03b82057 | 1169 | return 1; |
5269d0bd | 1170 | } |
1171 | ||
e6e3b09b | 1172 | void |
28c60158 | 1173 | peerDestroy(void *data) |
e6e3b09b | 1174 | { |
a3c6762c | 1175 | CachePeer *p = (CachePeer *)data; |
62e76326 | 1176 | |
b69f7771 | 1177 | if (p == NULL) |
62e76326 | 1178 | return; |
1179 | ||
b802d2cb | 1180 | CachePeerDomainList *nl = NULL; |
b115733c | 1181 | |
b802d2cb | 1182 | for (CachePeerDomainList *l = p->peer_domain; l; l = nl) { |
62e76326 | 1183 | nl = l->next; |
1184 | safe_free(l->domain); | |
b115733c | 1185 | xfree(l); |
ee4a1f5d | 1186 | } |
62e76326 | 1187 | |
b69f7771 | 1188 | safe_free(p->host); |
be753325 | 1189 | safe_free(p->name); |
1190 | safe_free(p->domain); | |
e13ee7ad | 1191 | #if USE_CACHE_DIGESTS |
62e76326 | 1192 | |
fa80a8ef | 1193 | cbdataReferenceDone(p->digest); |
e13ee7ad | 1194 | #endif |
e6e3b09b | 1195 | } |
c7a3724d | 1196 | |
e13ee7ad | 1197 | void |
a3c6762c | 1198 | peerNoteDigestGone(CachePeer * p) |
e13ee7ad | 1199 | { |
1200 | #if USE_CACHE_DIGESTS | |
fa80a8ef | 1201 | cbdataReferenceDone(p->digest); |
e13ee7ad | 1202 | #endif |
1203 | } | |
1204 | ||
dd4bd44e | 1205 | static void |
4a3b98d7 | 1206 | peerDNSConfigure(const ipcache_addrs *ia, const Dns::LookupDetails &, void *data) |
dd4bd44e | 1207 | { |
e8dca475 CT |
1208 | // TODO: connections to no-longer valid IP addresses should be |
1209 | // closed when we can detect such IP addresses. | |
1210 | ||
a3c6762c | 1211 | CachePeer *p = (CachePeer *)data; |
62e76326 | 1212 | |
dd4bd44e | 1213 | int j; |
62e76326 | 1214 | |
b69f7771 | 1215 | if (p->n_addresses == 0) { |
e0236918 | 1216 | debugs(15, DBG_IMPORTANT, "Configuring " << neighborTypeStr(p) << " " << p->host << "/" << p->http_port << "/" << p->icp.port); |
62e76326 | 1217 | |
1218 | if (p->type == PEER_MULTICAST) | |
e0236918 | 1219 | debugs(15, DBG_IMPORTANT, " Multicast TTL = " << p->mcast.ttl); |
b69f7771 | 1220 | } |
62e76326 | 1221 | |
b69f7771 | 1222 | p->n_addresses = 0; |
62e76326 | 1223 | |
dd4bd44e | 1224 | if (ia == NULL) { |
fa84c01d | 1225 | debugs(0, DBG_CRITICAL, "WARNING: DNS lookup for '" << p->host << "' failed!"); |
62e76326 | 1226 | return; |
dd4bd44e | 1227 | } |
62e76326 | 1228 | |
c04fe656 | 1229 | if ((int) ia->count < 1) { |
fa84c01d | 1230 | debugs(0, DBG_CRITICAL, "WARNING: No IP address found for '" << p->host << "'!"); |
62e76326 | 1231 | return; |
dd4bd44e | 1232 | } |
62e76326 | 1233 | |
ff9970cc | 1234 | p->tcp_up = p->connect_fail_limit; |
dc3a5177 | 1235 | |
5db6bf73 | 1236 | for (j = 0; j < (int) ia->count && j < PEER_MAX_ADDRESSES; ++j) { |
62e76326 | 1237 | p->addresses[j] = ia->in_addrs[j]; |
cc192b50 | 1238 | debugs(15, 2, "--> IP address #" << j << ": " << p->addresses[j]); |
5db6bf73 | 1239 | ++ p->n_addresses; |
dd4bd44e | 1240 | } |
62e76326 | 1241 | |
4dd643d5 | 1242 | p->in_addr.setEmpty(); |
cc192b50 | 1243 | p->in_addr = p->addresses[0]; |
4dd643d5 | 1244 | p->in_addr.port(p->icp.port); |
62e76326 | 1245 | |
b69f7771 | 1246 | if (p->type == PEER_MULTICAST) |
62e76326 | 1247 | peerCountMcastPeersSchedule(p, 10); |
1248 | ||
9b5c4a9a | 1249 | #if USE_ICMP |
e51c8197 | 1250 | if (p->type != PEER_MULTICAST && IamWorkerProcess()) |
62e76326 | 1251 | if (!p->options.no_netdb_exchange) |
1252 | eventAddIsh("netdbExchangeStart", netdbExchangeStart, p, 30.0, 1); | |
9b5c4a9a AJ |
1253 | #endif |
1254 | ||
e8dca475 CT |
1255 | if (p->standby.mgr.valid()) |
1256 | PeerPoolMgr::Checkpoint(p->standby.mgr, "resolved peer"); | |
dd4bd44e | 1257 | } |
1258 | ||
1259 | static void | |
51242273 | 1260 | peerRefreshDNS(void *data) |
dd4bd44e | 1261 | { |
a3c6762c | 1262 | CachePeer *p = NULL; |
62e76326 | 1263 | |
46ca5fc6 | 1264 | if (eventFind(peerRefreshDNS, NULL)) |
62e76326 | 1265 | eventDelete(peerRefreshDNS, NULL); |
1266 | ||
51242273 | 1267 | if (!data && 0 == stat5minClientRequests()) { |
62e76326 | 1268 | /* no recent client traffic, wait a bit */ |
1269 | eventAddIsh("peerRefreshDNS", peerRefreshDNS, NULL, 180.0, 1); | |
1270 | return; | |
dd4bd44e | 1271 | } |
62e76326 | 1272 | |
1f3c4622 | 1273 | for (p = Config.peers; p; p = p->next) |
62e76326 | 1274 | ipcache_nbgethostbyname(p->host, peerDNSConfigure, p); |
1275 | ||
dd4bd44e | 1276 | /* Reconfigure the peers every hour */ |
52040193 | 1277 | eventAddIsh("peerRefreshDNS", peerRefreshDNS, NULL, 3600.0, 1); |
dd4bd44e | 1278 | } |
e924600d | 1279 | |
4ed0e075 | 1280 | static void |
a3c6762c | 1281 | peerConnectFailedSilent(CachePeer * p) |
eb406bb7 | 1282 | { |
1283 | p->stats.last_connect_failure = squid_curtime; | |
62e76326 | 1284 | |
eb406bb7 | 1285 | if (!p->tcp_up) { |
bf8fe701 | 1286 | debugs(15, 2, "TCP connection to " << p->host << "/" << p->http_port << |
1287 | " dead"); | |
62e76326 | 1288 | return; |
eb406bb7 | 1289 | } |
62e76326 | 1290 | |
5e263176 | 1291 | -- p->tcp_up; |
62e76326 | 1292 | |
eb406bb7 | 1293 | if (!p->tcp_up) { |
e0236918 | 1294 | debugs(15, DBG_IMPORTANT, "Detected DEAD " << neighborTypeStr(p) << ": " << p->name); |
62e76326 | 1295 | p->stats.logged_state = PEER_DEAD; |
eb406bb7 | 1296 | } |
1297 | } | |
1298 | ||
4ed0e075 | 1299 | void |
a3c6762c | 1300 | peerConnectFailed(CachePeer *p) |
4ed0e075 | 1301 | { |
e0236918 | 1302 | debugs(15, DBG_IMPORTANT, "TCP connection to " << p->host << "/" << p->http_port << " failed"); |
4ed0e075 | 1303 | peerConnectFailedSilent(p); |
1304 | } | |
1305 | ||
eb406bb7 | 1306 | void |
a3c6762c | 1307 | peerConnectSucceded(CachePeer * p) |
eb406bb7 | 1308 | { |
1309 | if (!p->tcp_up) { | |
bf8fe701 | 1310 | debugs(15, 2, "TCP connection to " << p->host << "/" << p->http_port << " succeded"); |
ff9970cc | 1311 | p->tcp_up = p->connect_fail_limit; // NP: so peerAlive(p) works properly. |
32a47e3e | 1312 | peerAlive(p); |
26ac0430 AJ |
1313 | if (!p->n_addresses) |
1314 | ipcache_nbgethostbyname(p->host, peerDNSConfigure, p); | |
1315 | } else | |
ff9970cc | 1316 | p->tcp_up = p->connect_fail_limit; |
eb406bb7 | 1317 | } |
1318 | ||
4ed0e075 | 1319 | /* |
26ac0430 | 1320 | * peerProbeConnect will be called on dead peers by neighborUp |
4ed0e075 | 1321 | */ |
cfd66529 | 1322 | static bool |
a3c6762c | 1323 | peerProbeConnect(CachePeer * p) |
e924600d | 1324 | { |
cfd66529 AJ |
1325 | time_t ctimeout = p->connect_timeout > 0 ? p->connect_timeout : Config.Timeout.peer_connect; |
1326 | bool ret = (squid_curtime - p->stats.last_connect_failure) > (ctimeout * 10); | |
62e76326 | 1327 | |
aed188fd | 1328 | if (p->testing_now > 0) |
4ed0e075 | 1329 | return ret;/* probe already running */ |
62e76326 | 1330 | |
4ed0e075 | 1331 | if (squid_curtime - p->stats.last_connect_probe == 0) |
1332 | return ret;/* don't probe to often */ | |
62e76326 | 1333 | |
a3c6762c | 1334 | /* for each IP address of this CachePeer. find one that we can connect to and probe it. */ |
5db6bf73 | 1335 | for (int i = 0; i < p->n_addresses; ++i) { |
f9b72e0c | 1336 | Comm::ConnectionPointer conn = new Comm::Connection; |
cfd66529 | 1337 | conn->remote = p->addresses[i]; |
4dd643d5 | 1338 | conn->remote.port(p->http_port); |
06c40c46 | 1339 | conn->setPeer(p); |
cfd66529 | 1340 | getOutgoingAddress(NULL, conn); |
cc192b50 | 1341 | |
5db6bf73 | 1342 | ++ p->testing_now; |
715b5def | 1343 | |
aed188fd | 1344 | AsyncCall::Pointer call = commCbCall(15,3, "peerProbeConnectDone", CommConnectCbPtrFun(peerProbeConnectDone, p)); |
4accd6d8 | 1345 | Comm::ConnOpener *cs = new Comm::ConnOpener(conn, call, ctimeout); |
aed188fd | 1346 | cs->setHost(p->host); |
855150a4 | 1347 | AsyncJob::Start(cs); |
715b5def AJ |
1348 | } |
1349 | ||
eb406bb7 | 1350 | p->stats.last_connect_probe = squid_curtime; |
62e76326 | 1351 | |
4ed0e075 | 1352 | return ret; |
e924600d | 1353 | } |
1354 | ||
1355 | static void | |
ced8def3 | 1356 | peerProbeConnectDone(const Comm::ConnectionPointer &conn, Comm::Flag status, int, void *data) |
e924600d | 1357 | { |
a3c6762c | 1358 | CachePeer *p = (CachePeer*)data; |
62e76326 | 1359 | |
c8407295 | 1360 | if (status == Comm::OK) { |
62e76326 | 1361 | peerConnectSucceded(p); |
e924600d | 1362 | } else { |
4ed0e075 | 1363 | peerConnectFailedSilent(p); |
e924600d | 1364 | } |
62e76326 | 1365 | |
5e263176 | 1366 | -- p->testing_now; |
db9bf30d AJ |
1367 | conn->close(); |
1368 | // TODO: log this traffic. | |
e924600d | 1369 | } |
1370 | ||
429fdbec | 1371 | static void |
a3c6762c | 1372 | peerCountMcastPeersSchedule(CachePeer * p, time_t when) |
429fdbec | 1373 | { |
b515fc11 | 1374 | if (p->mcast.flags.count_event_pending) |
62e76326 | 1375 | return; |
1376 | ||
429fdbec | 1377 | eventAdd("peerCountMcastPeersStart", |
62e76326 | 1378 | peerCountMcastPeersStart, |
1379 | p, | |
1380 | (double) when, 1); | |
1381 | ||
ccdf4138 | 1382 | p->mcast.flags.count_event_pending = true; |
429fdbec | 1383 | } |
1384 | ||
1385 | static void | |
1386 | peerCountMcastPeersStart(void *data) | |
1387 | { | |
a3c6762c | 1388 | CachePeer *p = (CachePeer *)data; |
28c60158 | 1389 | ps_state *psstate; |
429fdbec | 1390 | StoreEntry *fake; |
1391 | MemObject *mem; | |
1392 | icp_common_t *query; | |
007b8be4 | 1393 | int reqnum; |
429fdbec | 1394 | LOCAL_ARRAY(char, url, MAX_URL); |
ce66013b | 1395 | assert(p->type == PEER_MULTICAST); |
ccdf4138 | 1396 | p->mcast.flags.count_event_pending = false; |
cc192b50 | 1397 | snprintf(url, MAX_URL, "http://"); |
4dd643d5 | 1398 | p->in_addr.toUrl(url+7, MAX_URL -8 ); |
cc192b50 | 1399 | strcat(url, "/"); |
c2a7cefd | 1400 | fake = storeCreateEntry(url, url, RequestFlags(), Http::METHOD_GET); |
c21ad0f5 | 1401 | HttpRequest *req = HttpRequest::CreateFromUrl(url); |
b24880fe | 1402 | psstate = new ps_state; |
b248c2a3 AJ |
1403 | psstate->request = req; |
1404 | HTTPMSGLOCK(psstate->request); | |
429fdbec | 1405 | psstate->entry = fake; |
1406 | psstate->callback = NULL; | |
99117d82 | 1407 | psstate->callback_data = cbdataReference(p); |
b4e7f82d | 1408 | psstate->ping.start = current_time; |
429fdbec | 1409 | mem = fake->mem_obj; |
b248c2a3 AJ |
1410 | mem->request = psstate->request; |
1411 | HTTPMSGLOCK(mem->request); | |
429fdbec | 1412 | mem->start_ping = current_time; |
b4e7f82d | 1413 | mem->ping_reply_callback = peerCountHandleIcpReply; |
429fdbec | 1414 | mem->ircb_data = psstate; |
e0d28505 | 1415 | mcastSetTtl(icpOutgoingConn->fd, p->mcast.ttl); |
007b8be4 | 1416 | p->mcast.id = mem->id; |
332dafa2 | 1417 | reqnum = icpSetCacheKey((const cache_key *)fake->key); |
e6ccf245 | 1418 | query = _icp_common_t::createMessage(ICP_QUERY, 0, url, reqnum, 0); |
e0d28505 | 1419 | icpUdpSend(icpOutgoingConn->fd, p->in_addr, query, LOG_ICP_QUERY, 0); |
429fdbec | 1420 | fake->ping_status = PING_WAITING; |
1421 | eventAdd("peerCountMcastPeersDone", | |
62e76326 | 1422 | peerCountMcastPeersDone, |
1423 | psstate, | |
99117d82 | 1424 | Config.Timeout.mcast_icp_query / 1000.0, 1); |
ccdf4138 | 1425 | p->mcast.flags.counting = true; |
429fdbec | 1426 | peerCountMcastPeersSchedule(p, MCAST_COUNT_RATE); |
1427 | } | |
1428 | ||
1429 | static void | |
1430 | peerCountMcastPeersDone(void *data) | |
1431 | { | |
e6ccf245 | 1432 | ps_state *psstate = (ps_state *)data; |
429fdbec | 1433 | StoreEntry *fake = psstate->entry; |
99117d82 | 1434 | |
1435 | if (cbdataReferenceValid(psstate->callback_data)) { | |
a3c6762c | 1436 | CachePeer *p = (CachePeer *)psstate->callback_data; |
ccdf4138 | 1437 | p->mcast.flags.counting = false; |
a98bcbee | 1438 | p->mcast.avg_n_members = Math::doubleAverage(p->mcast.avg_n_members, (double) psstate->ping.n_recv, ++p->mcast.n_times_counted, 10); |
e0236918 | 1439 | debugs(15, DBG_IMPORTANT, "Group " << p->host << ": " << psstate->ping.n_recv << |
bf8fe701 | 1440 | " replies, "<< std::setw(4)<< std::setprecision(2) << |
1441 | p->mcast.avg_n_members <<" average, RTT " << p->stats.rtt); | |
99117d82 | 1442 | p->mcast.n_replies_expected = (int) p->mcast.avg_n_members; |
1443 | } | |
1444 | ||
1445 | cbdataReferenceDone(psstate->callback_data); | |
1446 | ||
bc52369a | 1447 | fake->abort(); // sets ENTRY_ABORTED and initiates releated cleanup |
6dd9f4bd | 1448 | HTTPMSGUNLOCK(fake->mem_obj->request); |
acc5dc4c | 1449 | fake->unlock("peerCountMcastPeersDone"); |
6dd9f4bd | 1450 | HTTPMSGUNLOCK(psstate->request); |
1a827bc0 | 1451 | cbdataFree(psstate); |
429fdbec | 1452 | } |
1453 | ||
1454 | static void | |
ced8def3 | 1455 | peerCountHandleIcpReply(CachePeer * p, peer_t, AnyP::ProtocolType proto, void *, void *data) |
429fdbec | 1456 | { |
e6ccf245 | 1457 | ps_state *psstate = (ps_state *)data; |
1a827bc0 | 1458 | StoreEntry *fake = psstate->entry; |
ced8def3 | 1459 | assert(fake); |
1a827bc0 | 1460 | MemObject *mem = fake->mem_obj; |
ced8def3 | 1461 | assert(mem); |
1a827bc0 | 1462 | int rtt = tvSubMsec(mem->start_ping, current_time); |
0c3d3f65 | 1463 | assert(proto == AnyP::PROTO_ICP); |
5db6bf73 | 1464 | ++ psstate->ping.n_recv; |
ced8def3 | 1465 | int rtt_av_factor = RTT_AV_FACTOR; |
62e76326 | 1466 | |
d1b63fc8 | 1467 | if (p->options.weighted_roundrobin) |
62e76326 | 1468 | rtt_av_factor = RTT_BACKGROUND_AV_FACTOR; |
1469 | ||
a98bcbee | 1470 | p->stats.rtt = Math::intAverage(p->stats.rtt, rtt, psstate->ping.n_recv, rtt_av_factor); |
429fdbec | 1471 | } |
ed7f5615 | 1472 | |
1473 | static void | |
1474 | neighborDumpPeers(StoreEntry * sentry) | |
1475 | { | |
1476 | dump_peers(sentry, Config.peers); | |
1477 | } | |
1478 | ||
1479 | static void | |
1480 | neighborDumpNonPeers(StoreEntry * sentry) | |
1481 | { | |
1482 | dump_peers(sentry, non_peers); | |
1483 | } | |
1484 | ||
a369131d | 1485 | void |
a3c6762c | 1486 | dump_peer_options(StoreEntry * sentry, CachePeer * p) |
a369131d | 1487 | { |
cd196bc8 | 1488 | if (p->options.proxy_only) |
62e76326 | 1489 | storeAppendPrintf(sentry, " proxy-only"); |
1490 | ||
cd196bc8 | 1491 | if (p->options.no_query) |
62e76326 | 1492 | storeAppendPrintf(sentry, " no-query"); |
1493 | ||
d1b63fc8 | 1494 | if (p->options.background_ping) |
62e76326 | 1495 | storeAppendPrintf(sentry, " background-ping"); |
1496 | ||
cd196bc8 | 1497 | if (p->options.no_digest) |
62e76326 | 1498 | storeAppendPrintf(sentry, " no-digest"); |
1499 | ||
cd196bc8 | 1500 | if (p->options.default_parent) |
62e76326 | 1501 | storeAppendPrintf(sentry, " default"); |
1502 | ||
cd196bc8 | 1503 | if (p->options.roundrobin) |
62e76326 | 1504 | storeAppendPrintf(sentry, " round-robin"); |
1505 | ||
f7e1d9ce HN |
1506 | if (p->options.carp) |
1507 | storeAppendPrintf(sentry, " carp"); | |
354b5a2b | 1508 | |
2f1431ea | 1509 | #if USE_AUTH |
f7e1d9ce HN |
1510 | if (p->options.userhash) |
1511 | storeAppendPrintf(sentry, " userhash"); | |
354b5a2b | 1512 | #endif |
f7e1d9ce | 1513 | |
354b5a2b | 1514 | if (p->options.sourcehash) |
f7e1d9ce | 1515 | storeAppendPrintf(sentry, " sourcehash"); |
354b5a2b | 1516 | |
d1b63fc8 | 1517 | if (p->options.weighted_roundrobin) |
62e76326 | 1518 | storeAppendPrintf(sentry, " weighted-round-robin"); |
1519 | ||
cd196bc8 | 1520 | if (p->options.mcast_responder) |
62e76326 | 1521 | storeAppendPrintf(sentry, " multicast-responder"); |
1522 | ||
8a368316 AJ |
1523 | #if PEER_MULTICAST_SIBLINGS |
1524 | if (p->options.mcast_siblings) | |
1525 | storeAppendPrintf(sentry, " multicast-siblings"); | |
1526 | #endif | |
1527 | ||
678a066c | 1528 | if (p->weight != 1) |
62e76326 | 1529 | storeAppendPrintf(sentry, " weight=%d", p->weight); |
1530 | ||
cd196bc8 | 1531 | if (p->options.closest_only) |
62e76326 | 1532 | storeAppendPrintf(sentry, " closest-only"); |
1533 | ||
dc9d133b | 1534 | #if USE_HTCP |
18191440 | 1535 | if (p->options.htcp) { |
62e76326 | 1536 | storeAppendPrintf(sentry, " htcp"); |
18191440 AJ |
1537 | if (p->options.htcp_oldsquid || p->options.htcp_no_clr || p->options.htcp_no_purge_clr || p->options.htcp_only_clr) { |
1538 | int doneopts=0; | |
1539 | if (p->options.htcp_oldsquid) | |
1540 | storeAppendPrintf(sentry, "%soldsquid",(doneopts++>0?",":"=")); | |
1541 | if (p->options.htcp_no_clr) | |
1542 | storeAppendPrintf(sentry, "%sno-clr",(doneopts++>0?",":"=")); | |
1543 | if (p->options.htcp_no_purge_clr) | |
1544 | storeAppendPrintf(sentry, "%sno-purge-clr",(doneopts++>0?",":"=")); | |
1545 | if (p->options.htcp_only_clr) | |
1546 | storeAppendPrintf(sentry, "%sonly-clr",(doneopts++>0?",":"=")); | |
1547 | } | |
1548 | } | |
dc9d133b | 1549 | #endif |
62e76326 | 1550 | |
cd196bc8 | 1551 | if (p->options.no_netdb_exchange) |
62e76326 | 1552 | storeAppendPrintf(sentry, " no-netdb-exchange"); |
1553 | ||
9a0a18de | 1554 | #if USE_DELAY_POOLS |
cd196bc8 | 1555 | if (p->options.no_delay) |
62e76326 | 1556 | storeAppendPrintf(sentry, " no-delay"); |
95e36d02 | 1557 | #endif |
62e76326 | 1558 | |
c68e9c6b | 1559 | if (p->login) |
62e76326 | 1560 | storeAppendPrintf(sentry, " login=%s", p->login); |
1561 | ||
a369131d | 1562 | if (p->mcast.ttl > 0) |
62e76326 | 1563 | storeAppendPrintf(sentry, " ttl=%d", p->mcast.ttl); |
1564 | ||
be753325 | 1565 | if (p->connect_timeout > 0) |
62e76326 | 1566 | storeAppendPrintf(sentry, " connect-timeout=%d", (int) p->connect_timeout); |
1567 | ||
ff9970cc AJ |
1568 | if (p->connect_fail_limit != PEER_TCP_MAGIC_COUNT) |
1569 | storeAppendPrintf(sentry, " connect-fail-limit=%d", p->connect_fail_limit); | |
1570 | ||
be753325 | 1571 | #if USE_CACHE_DIGESTS |
62e76326 | 1572 | |
be753325 | 1573 | if (p->digest_url) |
62e76326 | 1574 | storeAppendPrintf(sentry, " digest-url=%s", p->digest_url); |
1575 | ||
be753325 | 1576 | #endif |
62e76326 | 1577 | |
be753325 | 1578 | if (p->options.allow_miss) |
62e76326 | 1579 | storeAppendPrintf(sentry, " allow-miss"); |
1580 | ||
b0758e04 AJ |
1581 | if (p->options.no_tproxy) |
1582 | storeAppendPrintf(sentry, " no-tproxy"); | |
1583 | ||
be753325 | 1584 | if (p->max_conn > 0) |
62e76326 | 1585 | storeAppendPrintf(sentry, " max-conn=%d", p->max_conn); |
e8dca475 CT |
1586 | if (p->standby.limit > 0) |
1587 | storeAppendPrintf(sentry, " standby=%d", p->standby.limit); | |
62e76326 | 1588 | |
be753325 | 1589 | if (p->options.originserver) |
62e76326 | 1590 | storeAppendPrintf(sentry, " originserver"); |
1591 | ||
be753325 | 1592 | if (p->domain) |
62e76326 | 1593 | storeAppendPrintf(sentry, " forceddomain=%s", p->domain); |
1594 | ||
26ac0430 AJ |
1595 | if (p->connection_auth == 0) |
1596 | storeAppendPrintf(sentry, " connection-auth=off"); | |
1597 | else if (p->connection_auth == 1) | |
1598 | storeAppendPrintf(sentry, " connection-auth=on"); | |
1599 | else if (p->connection_auth == 2) | |
1600 | storeAppendPrintf(sentry, " connection-auth=auto"); | |
d67acb4e | 1601 | |
a369131d | 1602 | storeAppendPrintf(sentry, "\n"); |
1603 | } | |
1604 | ||
ed7f5615 | 1605 | static void |
a3c6762c | 1606 | dump_peers(StoreEntry * sentry, CachePeer * peers) |
ed7f5615 | 1607 | { |
a3c6762c | 1608 | CachePeer *e = NULL; |
cc192b50 | 1609 | char ntoabuf[MAX_IPSTRLEN]; |
b802d2cb | 1610 | CachePeerDomainList *d = NULL; |
ed7f5615 | 1611 | icp_opcode op; |
06e6d12a | 1612 | int i; |
62e76326 | 1613 | |
ed7f5615 | 1614 | if (peers == NULL) |
62e76326 | 1615 | storeAppendPrintf(sentry, "There are no neighbors installed.\n"); |
1616 | ||
ed7f5615 | 1617 | for (e = peers; e; e = e->next) { |
62e76326 | 1618 | assert(e->host != NULL); |
1619 | storeAppendPrintf(sentry, "\n%-11.11s: %s\n", | |
1620 | neighborTypeStr(e), | |
1621 | e->name); | |
1622 | storeAppendPrintf(sentry, "Host : %s/%d/%d\n", | |
1623 | e->host, | |
1624 | e->http_port, | |
1625 | e->icp.port); | |
1626 | storeAppendPrintf(sentry, "Flags :"); | |
1627 | dump_peer_options(sentry, e); | |
1628 | ||
5db6bf73 | 1629 | for (i = 0; i < e->n_addresses; ++i) { |
62e76326 | 1630 | storeAppendPrintf(sentry, "Address[%d] : %s\n", i, |
4dd643d5 | 1631 | e->addresses[i].toStr(ntoabuf,MAX_IPSTRLEN) ); |
62e76326 | 1632 | } |
1633 | ||
1634 | storeAppendPrintf(sentry, "Status : %s\n", | |
1635 | neighborUp(e) ? "Up" : "Down"); | |
1636 | storeAppendPrintf(sentry, "FETCHES : %d\n", e->stats.fetches); | |
1637 | storeAppendPrintf(sentry, "OPEN CONNS : %d\n", e->stats.conn_open); | |
1638 | storeAppendPrintf(sentry, "AVG RTT : %d msec\n", e->stats.rtt); | |
1639 | ||
1640 | if (!e->options.no_query) { | |
1641 | storeAppendPrintf(sentry, "LAST QUERY : %8d seconds ago\n", | |
1642 | (int) (squid_curtime - e->stats.last_query)); | |
1643 | ||
1644 | if (e->stats.last_reply > 0) | |
1645 | storeAppendPrintf(sentry, "LAST REPLY : %8d seconds ago\n", | |
1646 | (int) (squid_curtime - e->stats.last_reply)); | |
1647 | else | |
1648 | storeAppendPrintf(sentry, "LAST REPLY : none received\n"); | |
1649 | ||
1650 | storeAppendPrintf(sentry, "PINGS SENT : %8d\n", e->stats.pings_sent); | |
1651 | ||
1652 | storeAppendPrintf(sentry, "PINGS ACKED: %8d %3d%%\n", | |
1653 | e->stats.pings_acked, | |
a98bcbee | 1654 | Math::intPercent(e->stats.pings_acked, e->stats.pings_sent)); |
62e76326 | 1655 | } |
1656 | ||
a98bcbee | 1657 | storeAppendPrintf(sentry, "IGNORED : %8d %3d%%\n", e->stats.ignored_replies, Math::intPercent(e->stats.ignored_replies, e->stats.pings_acked)); |
62e76326 | 1658 | |
1659 | if (!e->options.no_query) { | |
1660 | storeAppendPrintf(sentry, "Histogram of PINGS ACKED:\n"); | |
1994bb24 | 1661 | #if USE_HTCP |
62e76326 | 1662 | |
1663 | if (e->options.htcp) { | |
1664 | storeAppendPrintf(sentry, "\tMisses\t%8d %3d%%\n", | |
1665 | e->htcp.counts[0], | |
a98bcbee | 1666 | Math::intPercent(e->htcp.counts[0], e->stats.pings_acked)); |
62e76326 | 1667 | storeAppendPrintf(sentry, "\tHits\t%8d %3d%%\n", |
1668 | e->htcp.counts[1], | |
a98bcbee | 1669 | Math::intPercent(e->htcp.counts[1], e->stats.pings_acked)); |
62e76326 | 1670 | } else { |
1994bb24 | 1671 | #endif |
62e76326 | 1672 | |
1673 | for (op = ICP_INVALID; op < ICP_END; ++op) { | |
1674 | if (e->icp.counts[op] == 0) | |
1675 | continue; | |
1676 | ||
1677 | storeAppendPrintf(sentry, " %12.12s : %8d %3d%%\n", | |
1678 | icp_opcode_str[op], | |
1679 | e->icp.counts[op], | |
a98bcbee | 1680 | Math::intPercent(e->icp.counts[op], e->stats.pings_acked)); |
62e76326 | 1681 | } |
1682 | ||
1994bb24 | 1683 | #if USE_HTCP |
62e76326 | 1684 | |
1685 | } | |
1686 | ||
1994bb24 | 1687 | #endif |
62e76326 | 1688 | |
1689 | } | |
1690 | ||
1691 | if (e->stats.last_connect_failure) { | |
1692 | storeAppendPrintf(sentry, "Last failed connect() at: %s\n", | |
20efa1c2 | 1693 | Time::FormatHttpd(e->stats.last_connect_failure)); |
62e76326 | 1694 | } |
1695 | ||
1696 | if (e->peer_domain != NULL) { | |
1697 | storeAppendPrintf(sentry, "DOMAIN LIST: "); | |
1698 | ||
1699 | for (d = e->peer_domain; d; d = d->next) { | |
1700 | storeAppendPrintf(sentry, "%s%s ", | |
1701 | d->do_ping ? null_string : "!", d->domain); | |
1702 | } | |
1703 | ||
1704 | storeAppendPrintf(sentry, "\n"); | |
1705 | } | |
1706 | ||
a98bcbee | 1707 | storeAppendPrintf(sentry, "keep-alive ratio: %d%%\n", Math::intPercent(e->stats.n_keepalives_recv, e->stats.n_keepalives_sent)); |
ed7f5615 | 1708 | } |
1709 | } | |
86aebcda | 1710 | |
1711 | #if USE_HTCP | |
1712 | void | |
fad2588a | 1713 | neighborsHtcpReply(const cache_key * key, HtcpReplyData * htcp, const Ip::Address &from) |
86aebcda | 1714 | { |
53525d53 | 1715 | StoreEntry *e = Store::Root().get(key); |
399cabec | 1716 | MemObject *mem = NULL; |
a3c6762c | 1717 | CachePeer *p; |
399cabec | 1718 | peer_t ntype = PEER_NONE; |
26ac0430 AJ |
1719 | debugs(15, 6, "neighborsHtcpReply: " << |
1720 | (htcp->hit ? "HIT" : "MISS") << " " << | |
1721 | storeKeyText(key) ); | |
62e76326 | 1722 | |
88e13392 | 1723 | if (NULL != e) |
62e76326 | 1724 | mem = e->mem_obj; |
1725 | ||
399cabec | 1726 | if ((p = whichPeer(from))) |
62e76326 | 1727 | neighborAliveHtcp(p, mem, htcp); |
1728 | ||
399cabec | 1729 | /* Does the entry exist? */ |
26ac0430 | 1730 | if (NULL == e) { |
bf8fe701 | 1731 | debugs(12, 3, "neighyborsHtcpReply: Cache key '" << storeKeyText(key) << "' not found"); |
62e76326 | 1732 | neighborCountIgnored(p); |
1733 | return; | |
399cabec | 1734 | } |
62e76326 | 1735 | |
399cabec | 1736 | /* check if someone is already fetching it */ |
26ac0430 | 1737 | if (EBIT_TEST(e->flags, ENTRY_DISPATCHED)) { |
bf8fe701 | 1738 | debugs(15, 3, "neighborsUdpAck: '" << storeKeyText(key) << "' already being fetched."); |
62e76326 | 1739 | neighborCountIgnored(p); |
1740 | return; | |
399cabec | 1741 | } |
62e76326 | 1742 | |
26ac0430 | 1743 | if (mem == NULL) { |
bf8fe701 | 1744 | debugs(15, 2, "Ignoring reply for missing mem_obj: " << storeKeyText(key)); |
62e76326 | 1745 | neighborCountIgnored(p); |
1746 | return; | |
399cabec | 1747 | } |
62e76326 | 1748 | |
26ac0430 | 1749 | if (e->ping_status != PING_WAITING) { |
bf8fe701 | 1750 | debugs(15, 2, "neighborsUdpAck: Entry " << storeKeyText(key) << " is not PING_WAITING"); |
62e76326 | 1751 | neighborCountIgnored(p); |
1752 | return; | |
399cabec | 1753 | } |
62e76326 | 1754 | |
1bfe9ade | 1755 | if (!e->locked()) { |
5bd484b5 | 1756 | // TODO: many entries are unlocked; why is this reported at level 1? |
e0236918 | 1757 | debugs(12, DBG_IMPORTANT, "neighborsUdpAck: '" << storeKeyText(key) << "' has no locks"); |
62e76326 | 1758 | neighborCountIgnored(p); |
1759 | return; | |
399cabec | 1760 | } |
62e76326 | 1761 | |
26ac0430 | 1762 | if (p) { |
62e76326 | 1763 | ntype = neighborType(p, mem->request); |
1764 | neighborUpdateRtt(p, mem); | |
44f2f2e4 | 1765 | } |
62e76326 | 1766 | |
26ac0430 | 1767 | if (ignoreMulticastReply(p, mem)) { |
62e76326 | 1768 | neighborCountIgnored(p); |
1769 | return; | |
399cabec | 1770 | } |
62e76326 | 1771 | |
bf8fe701 | 1772 | debugs(15, 3, "neighborsHtcpReply: e = " << e); |
0c3d3f65 | 1773 | mem->ping_reply_callback(p, ntype, AnyP::PROTO_HTCP, htcp, mem->ircb_data); |
86aebcda | 1774 | } |
62e76326 | 1775 | |
1bd06eff BR |
1776 | /* |
1777 | * Send HTCP CLR messages to all peers configured to receive them. | |
1778 | */ | |
4f4fa815 | 1779 | void |
8dceeee3 | 1780 | neighborsHtcpClear(StoreEntry * e, const char *uri, HttpRequest * req, const HttpRequestMethod &method, htcp_clr_reason reason) |
4f4fa815 | 1781 | { |
a3c6762c | 1782 | CachePeer *p; |
4f4fa815 BR |
1783 | char buf[128]; |
1784 | ||
4f4fa815 BR |
1785 | for (p = Config.peers; p; p = p->next) { |
1786 | if (!p->options.htcp) { | |
1787 | continue; | |
1788 | } | |
1789 | if (p->options.htcp_no_clr) { | |
1790 | continue; | |
1791 | } | |
1792 | if (p->options.htcp_no_purge_clr && reason == HTCP_CLR_PURGE) { | |
1793 | continue; | |
1794 | } | |
4dd643d5 | 1795 | debugs(15, 3, "neighborsHtcpClear: sending CLR to " << p->in_addr.toUrl(buf, 128)); |
4f4fa815 BR |
1796 | htcpClear(e, uri, req, method, p, reason); |
1797 | } | |
1798 | } | |
1799 | ||
86aebcda | 1800 | #endif |
f53969cc | 1801 |