2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
10 #include <afsconfig.h>
11 #include <afs/param.h>
24 #include <WINNT\syscfg.h>
25 #include <WINNT/afsreg.h>
30 osi_rwlock_t cm_serverLock;
31 osi_rwlock_t cm_syscfgLock;
33 cm_server_t *cm_serversAllFirstp = NULL;
34 cm_server_t *cm_serversAllLastp = NULL;
36 afs_uint32 cm_numFileServers = 0;
37 afs_uint32 cm_numVldbServers = 0;
40 cm_ForceNewConnectionsAllServers(void)
44 lock_ObtainRead(&cm_serverLock);
45 for (tsp = cm_serversAllFirstp;
47 tsp = (cm_server_t *)osi_QNext(&tsp->allq)) {
48 cm_GetServerNoLock(tsp);
49 lock_ReleaseRead(&cm_serverLock);
50 cm_ForceNewConnections(tsp);
51 lock_ObtainRead(&cm_serverLock);
52 cm_PutServerNoLock(tsp);
54 lock_ReleaseRead(&cm_serverLock);
58 cm_ServerClearRPCStats(void) {
62 lock_ObtainRead(&cm_serverLock);
63 for (tsp = cm_serversAllFirstp;
65 tsp = (cm_server_t *)osi_QNext(&tsp->allq)) {
69 rx_ClearPeerRPCStats(opcode_VL_ProbeServer>>32, tsp->addr.sin_addr.s_addr, port);
73 rx_ClearPeerRPCStats(opcode_RXAFS_GetCapabilities>>32, tsp->addr.sin_addr.s_addr, port);
74 rx_ClearPeerRPCStats(opcode_RXAFS_GetTime>>32, tsp->addr.sin_addr.s_addr, port);
78 lock_ReleaseRead(&cm_serverLock);
82 * lock_ObtainMutex must be held prior to calling
86 cm_RankServer(cm_server_t * tsp)
88 afs_int32 code = 0; /* start with "success" */
89 struct rx_debugPeer tpeer;
90 struct rx_peer * rxPeer;
93 afs_uint64 perfRank = 0;
97 int isDown = (tsp->flags & CM_SERVERFLAG_DOWN);
98 void *peerRpcStats = NULL;
99 afs_uint64 opcode = 0;
104 opcode = opcode_VL_ProbeServer;
108 opcode = opcode_RXAFS_GetCapabilities;
114 cm_SetServerIPRank(tsp);
120 * There are three potential components to the ranking:
121 * 1. Any administrative set preference whether it be
122 * via "fs setserverprefs", registry or dns.
124 * 2. Network subnet mask comparison.
126 * 3. Performance data.
128 * If there is an administrative rank, that is the
129 * the primary factor. If not the primary factor
130 * is the network ranking.
133 code = rx_GetLocalPeers(tsp->addr.sin_addr.s_addr, port, &tpeer);
135 peerRpcStats = rx_CopyPeerRPCStats(opcode, tsp->addr.sin_addr.s_addr, port);
136 if (peerRpcStats == NULL && tsp->type == CM_SERVER_FILE)
137 peerRpcStats = rx_CopyPeerRPCStats(opcode_RXAFS_GetTime, tsp->addr.sin_addr.s_addr, port);
139 afs_uint64 execTimeSum = _8THMSEC(RPCOpStat_ExecTimeSum(peerRpcStats));
140 afs_uint64 queueTimeSum = _8THMSEC(RPCOpStat_QTimeSum(peerRpcStats));
141 afs_uint64 numCalls = RPCOpStat_NumCalls(peerRpcStats);
144 rtt = (execTimeSum - queueTimeSum) / numCalls;
146 rx_ReleaseRPCStats(peerRpcStats);
149 if (rtt == 0 && tpeer.rtt) {
156 perfRank += (6000 * log_rtt / 5000) * 5000;
158 if (tsp->type == CM_SERVER_FILE) {
159 /* give an edge to servers with high congestion windows */
160 perfRank -= (tpeer.cwind - 1)* 15;
165 if (tsp->adminRank) {
166 newRank = tsp->adminRank * 0.8;
167 newRank += tsp->ipRank * 0.2;
169 newRank = tsp->ipRank;
173 newRank += perfRank * 0.1;
175 newRank += (rand() & 0x000f); /* randomize */
177 if (newRank > 0xFFFF)
178 osi_Log1(afsd_logp, "new server rank %I64u exceeds 0xFFFF", newRank);
181 * If the ranking changes by more than the randomization
182 * factor, update the server reference lists.
184 if (abs(newRank - tsp->activeRank) > 0xf) {
185 tsp->activeRank = newRank;
187 lock_ReleaseMutex(&tsp->mx);
191 * find volumes which might have RO copy
192 * on server and change the ordering of
195 cm_ChangeRankVolume(tsp);
198 /* set preferences for an existing vlserver */
199 cm_ChangeRankCellVLServer(tsp);
202 lock_ObtainMutex(&tsp->mx);
210 cm_MarkServerDown(cm_server_t *tsp, afs_int32 code, int wasDown)
213 /* mark server as down */
214 if (!(tsp->flags & CM_SERVERFLAG_DOWN)) {
215 _InterlockedOr(&tsp->flags, CM_SERVERFLAG_DOWN);
216 tsp->downTime = time(NULL);
218 if (code != VRESTARTING) {
219 lock_ReleaseMutex(&tsp->mx);
220 cm_ForceNewConnections(tsp);
221 lock_ObtainMutex(&tsp->mx);
223 /* Now update the volume status if necessary */
225 if (tsp->type == CM_SERVER_FILE) {
226 cm_server_vols_t * tsrvp;
231 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
232 for (i=0; i<NUM_SERVER_VOLS; i++) {
233 if (tsrvp->ids[i] != 0) {
236 lock_ReleaseMutex(&tsp->mx);
237 code = cm_FindVolumeByID(tsp->cellp, tsrvp->ids[i],
239 CM_GETVOL_FLAG_NO_LRU_UPDATE,
241 lock_ObtainMutex(&tsp->mx);
243 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
255 cm_PingServer(cm_server_t *tsp)
260 struct rx_connection * rxconnp;
261 Capabilities caps = {0, 0};
265 lock_ObtainMutex(&tsp->mx);
266 if (tsp->flags & CM_SERVERFLAG_PINGING) {
268 osi_SleepM((LONG_PTR)tsp, &tsp->mx);
269 lock_ObtainMutex(&tsp->mx);
271 if (tsp->waitCount == 0)
272 _InterlockedAnd(&tsp->flags, ~CM_SERVERFLAG_PINGING);
274 osi_Wakeup((LONG_PTR)tsp);
275 lock_ReleaseMutex(&tsp->mx);
278 _InterlockedOr(&tsp->flags, CM_SERVERFLAG_PINGING);
279 wasDown = tsp->flags & CM_SERVERFLAG_DOWN;
280 afs_inet_ntoa_r(tsp->addr.sin_addr.S_un.S_addr, hoststr);
281 lock_ReleaseMutex(&tsp->mx);
283 code = cm_ConnByServer(tsp, cm_rootUserp, FALSE, &connp);
285 /* now call the appropriate ping call. Drop the timeout if
286 * the server is known to be down, so that we don't waste a
287 * lot of time retiming out down servers.
290 osi_Log4(afsd_logp, "cm_PingServer server %s (%s) was %s with caps 0x%x",
291 osi_LogSaveString(afsd_logp, hoststr),
292 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
293 wasDown ? "down" : "up",
296 rxconnp = cm_GetRxConn(connp);
298 rx_SetConnHardDeadTime(rxconnp, 10);
299 if (tsp->type == CM_SERVER_VLDB) {
300 code = VL_ProbeServer(rxconnp);
304 code = RXAFS_GetCapabilities(rxconnp, &caps);
307 rx_SetConnHardDeadTime(rxconnp, HardDeadtimeout);
308 rx_PutConnection(rxconnp);
310 } /* got an unauthenticated connection to this server */
312 lock_ObtainMutex(&tsp->mx);
313 if (code >= 0 || code == RXGEN_OPCODE || code == RX_CALL_BUSY) {
314 /* mark server as up */
315 _InterlockedAnd(&tsp->flags, ~CM_SERVERFLAG_DOWN);
318 /* we currently handle 32-bits of capabilities */
319 if (code != RXGEN_OPCODE && code != RX_CALL_BUSY &&
320 caps.Capabilities_len > 0) {
321 tsp->capabilities = caps.Capabilities_val[0];
322 xdr_free((xdrproc_t) xdr_Capabilities, &caps);
323 caps.Capabilities_len = 0;
324 caps.Capabilities_val = 0;
326 tsp->capabilities = 0;
329 osi_Log3(afsd_logp, "cm_PingServer server %s (%s) is up with caps 0x%x",
330 osi_LogSaveString(afsd_logp, hoststr),
331 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
334 /* Now update the volume status if necessary */
336 cm_server_vols_t * tsrvp;
340 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
341 for (i=0; i<NUM_SERVER_VOLS; i++) {
342 if (tsrvp->ids[i] != 0) {
345 lock_ReleaseMutex(&tsp->mx);
346 code = cm_FindVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
347 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE, &volp);
348 lock_ObtainMutex(&tsp->mx);
350 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
359 cm_MarkServerDown(tsp, code, wasDown);
361 osi_Log3(afsd_logp, "cm_PingServer server %s (%s) is down with caps 0x%x",
362 osi_LogSaveString(afsd_logp, hoststr),
363 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
367 if (tsp->waitCount == 0)
368 _InterlockedAnd(&tsp->flags, ~CM_SERVERFLAG_PINGING);
370 osi_Wakeup((LONG_PTR)tsp);
371 lock_ReleaseMutex(&tsp->mx);
379 lock_ObtainRead(&cm_serverLock);
380 for (tsp = cm_serversAllFirstp;
382 tsp = (cm_server_t *)osi_QNext(&tsp->allq)) {
383 cm_GetServerNoLock(tsp);
384 lock_ReleaseRead(&cm_serverLock);
386 lock_ObtainMutex(&tsp->mx);
388 /* if the server is not down, rank the server */
389 if(!(tsp->flags & CM_SERVERFLAG_DOWN))
392 lock_ReleaseMutex(&tsp->mx);
394 lock_ObtainRead(&cm_serverLock);
395 cm_PutServerNoLock(tsp);
397 lock_ReleaseRead(&cm_serverLock);
400 static void cm_CheckServersSingular(afs_uint32 flags, cm_cell_t *cellp)
402 /* ping all file servers, up or down, with unauthenticated connection,
403 * to find out whether we have all our callbacks from the server still.
404 * Also, ping down VLDBs.
412 lock_ObtainRead(&cm_serverLock);
413 for (tsp = cm_serversAllFirstp;
415 tsp = (cm_server_t *)osi_QNext(&tsp->allq)) {
416 cm_GetServerNoLock(tsp);
417 lock_ReleaseRead(&cm_serverLock);
419 /* now process the server */
420 lock_ObtainMutex(&tsp->mx);
423 isDown = tsp->flags & CM_SERVERFLAG_DOWN;
424 isFS = tsp->type == CM_SERVER_FILE;
425 isVLDB = tsp->type == CM_SERVER_VLDB;
427 /* only do the ping if the cell matches the requested cell, or we're
428 * matching all cells (cellp == NULL), and if we've requested to ping
429 * this type of {up, down} servers.
431 if ((cellp == NULL || cellp == tsp->cellp) &&
432 ((isDown && (flags & CM_FLAG_CHECKDOWNSERVERS)) ||
433 (!isDown && (flags & CM_FLAG_CHECKUPSERVERS))) &&
434 ((!(flags & CM_FLAG_CHECKVLDBSERVERS) ||
435 isVLDB && (flags & CM_FLAG_CHECKVLDBSERVERS)) &&
436 (!(flags & CM_FLAG_CHECKFILESERVERS) ||
437 isFS && (flags & CM_FLAG_CHECKFILESERVERS)))) {
439 } /* we're supposed to check this up/down server */
440 lock_ReleaseMutex(&tsp->mx);
442 /* at this point, we've adjusted the server state, so do the ping and
448 /* also, run the GC function for connections on all of the
449 * server's connections.
451 cm_GCConnections(tsp);
453 lock_ObtainRead(&cm_serverLock);
454 cm_PutServerNoLock(tsp);
456 lock_ReleaseRead(&cm_serverLock);
459 static void cm_CheckServersMulti(afs_uint32 flags, cm_cell_t *cellp)
462 * The goal of this function is to probe simultaneously
463 * probe all of the up/down servers (vldb/file) as
464 * specified by flags in the minimum number of RPCs.
465 * Effectively that means use one multi_RXAFS_GetCapabilities()
466 * followed by possibly one multi_RXAFS_GetTime() and
467 * one multi_VL_ProbeServer().
469 * To make this work we must construct the list of vldb
470 * and file servers that are to be probed as well as the
471 * associated data structures.
474 int srvAddrCount = 0;
475 struct srvAddr **addrs = NULL;
476 cm_conn_t **conns = NULL;
477 struct rx_connection **rxconns = NULL;
479 afs_int32 i, nconns = 0, maxconns;
480 afs_int32 *conntimer, *results;
481 Capabilities *caps = NULL;
482 cm_server_t ** serversp, *tsp;
483 afs_uint32 isDown, wasDown;
489 maxconns = max(cm_numFileServers,cm_numVldbServers);
493 conns = (cm_conn_t **)malloc(maxconns * sizeof(cm_conn_t *));
494 rxconns = (struct rx_connection **)malloc(maxconns * sizeof(struct rx_connection *));
495 conntimer = (afs_int32 *)malloc(maxconns * sizeof (afs_int32));
496 results = (afs_int32 *)malloc(maxconns * sizeof (afs_int32));
497 serversp = (cm_server_t **)malloc(maxconns * sizeof(cm_server_t *));
498 caps = (Capabilities *)malloc(maxconns * sizeof(Capabilities));
500 memset(caps, 0, maxconns * sizeof(Capabilities));
502 if ((flags & CM_FLAG_CHECKFILESERVERS) ||
503 !(flags & (CM_FLAG_CHECKFILESERVERS|CM_FLAG_CHECKVLDBSERVERS)))
505 lock_ObtainRead(&cm_serverLock);
506 for (nconns=0, tsp = cm_serversAllFirstp;
507 tsp != NULL && nconns < maxconns;
508 tsp = (cm_server_t *)osi_QNext(&tsp->allq)) {
509 if (tsp->type != CM_SERVER_FILE ||
510 tsp->cellp == NULL || /* SetPref only */
511 cellp && cellp != tsp->cellp)
514 cm_GetServerNoLock(tsp);
515 lock_ReleaseRead(&cm_serverLock);
517 lock_ObtainMutex(&tsp->mx);
518 isDown = tsp->flags & CM_SERVERFLAG_DOWN;
520 if ((tsp->flags & CM_SERVERFLAG_PINGING) ||
521 !((isDown && (flags & CM_FLAG_CHECKDOWNSERVERS)) ||
522 (!isDown && (flags & CM_FLAG_CHECKUPSERVERS)))) {
523 lock_ReleaseMutex(&tsp->mx);
524 lock_ObtainRead(&cm_serverLock);
525 cm_PutServerNoLock(tsp);
529 _InterlockedOr(&tsp->flags, CM_SERVERFLAG_PINGING);
530 lock_ReleaseMutex(&tsp->mx);
532 serversp[nconns] = tsp;
533 code = cm_ConnByServer(tsp, cm_rootUserp, FALSE, &conns[nconns]);
535 lock_ObtainRead(&cm_serverLock);
536 cm_PutServerNoLock(tsp);
539 lock_ObtainRead(&cm_serverLock);
540 rxconns[nconns] = cm_GetRxConn(conns[nconns]);
541 if (conntimer[nconns] = (isDown ? 1 : 0))
542 rx_SetConnHardDeadTime(rxconns[nconns], 10);
546 lock_ReleaseRead(&cm_serverLock);
549 /* Perform the multi call */
551 multi_Rx(rxconns,nconns)
553 multi_RXAFS_GetCapabilities(&caps[multi_i]);
554 results[multi_i]=multi_error;
558 /* Process results of servers that support RXAFS_GetCapabilities */
559 for (i=0; i<nconns; i++) {
561 rx_SetConnHardDeadTime(rxconns[i], HardDeadtimeout);
562 rx_PutConnection(rxconns[i]);
563 cm_PutConn(conns[i]);
566 cm_GCConnections(tsp);
568 lock_ObtainMutex(&tsp->mx);
569 wasDown = tsp->flags & CM_SERVERFLAG_DOWN;
571 if (results[i] >= 0 || results[i] == RXGEN_OPCODE ||
572 results[i] == RX_CALL_BUSY) {
573 /* mark server as up */
574 _InterlockedAnd(&tsp->flags, ~CM_SERVERFLAG_DOWN);
577 /* we currently handle 32-bits of capabilities */
578 if (results[i] != RXGEN_OPCODE && results[i] != RX_CALL_BUSY &&
579 caps[i].Capabilities_len > 0) {
580 tsp->capabilities = caps[i].Capabilities_val[0];
581 xdr_free((xdrproc_t) xdr_Capabilities, &caps[i]);
582 caps[i].Capabilities_len = 0;
583 caps[i].Capabilities_val = 0;
585 tsp->capabilities = 0;
588 afs_inet_ntoa_r(tsp->addr.sin_addr.S_un.S_addr, hoststr);
589 osi_Log3(afsd_logp, "cm_MultiPingServer server %s (%s) is up with caps 0x%x",
590 osi_LogSaveString(afsd_logp, hoststr),
591 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
594 /* Now update the volume status if necessary */
596 cm_server_vols_t * tsrvp;
600 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
601 for (i=0; i<NUM_SERVER_VOLS; i++) {
602 if (tsrvp->ids[i] != 0) {
605 lock_ReleaseMutex(&tsp->mx);
606 code = cm_FindVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
607 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE, &volp);
608 lock_ObtainMutex(&tsp->mx);
610 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
619 cm_MarkServerDown(tsp, results[i], wasDown);
621 afs_inet_ntoa_r(tsp->addr.sin_addr.S_un.S_addr, hoststr);
622 osi_Log3(afsd_logp, "cm_MultiPingServer server %s (%s) is down with caps 0x%x",
623 osi_LogSaveString(afsd_logp, hoststr),
624 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
628 if (tsp->waitCount == 0)
629 _InterlockedAnd(&tsp->flags, ~CM_SERVERFLAG_PINGING);
631 osi_Wakeup((LONG_PTR)tsp);
633 lock_ReleaseMutex(&tsp->mx);
639 if ((flags & CM_FLAG_CHECKVLDBSERVERS) ||
640 !(flags & (CM_FLAG_CHECKFILESERVERS|CM_FLAG_CHECKVLDBSERVERS)))
642 lock_ObtainRead(&cm_serverLock);
643 for (nconns=0, tsp = cm_serversAllFirstp;
644 tsp != NULL && nconns < maxconns;
645 tsp = (cm_server_t *)osi_QNext(&tsp->allq)) {
646 if (tsp->type != CM_SERVER_VLDB ||
647 tsp->cellp == NULL || /* SetPref only */
648 cellp && cellp != tsp->cellp)
651 cm_GetServerNoLock(tsp);
652 lock_ReleaseRead(&cm_serverLock);
654 lock_ObtainMutex(&tsp->mx);
655 isDown = tsp->flags & CM_SERVERFLAG_DOWN;
657 if ((tsp->flags & CM_SERVERFLAG_PINGING) ||
658 !((isDown && (flags & CM_FLAG_CHECKDOWNSERVERS)) ||
659 (!isDown && (flags & CM_FLAG_CHECKUPSERVERS)))) {
660 lock_ReleaseMutex(&tsp->mx);
661 lock_ObtainRead(&cm_serverLock);
662 cm_PutServerNoLock(tsp);
666 _InterlockedOr(&tsp->flags, CM_SERVERFLAG_PINGING);
667 lock_ReleaseMutex(&tsp->mx);
669 serversp[nconns] = tsp;
670 code = cm_ConnByServer(tsp, cm_rootUserp, FALSE, &conns[nconns]);
672 lock_ObtainRead(&cm_serverLock);
673 cm_PutServerNoLock(tsp);
676 lock_ObtainRead(&cm_serverLock);
677 rxconns[nconns] = cm_GetRxConn(conns[nconns]);
678 conntimer[nconns] = (isDown ? 1 : 0);
680 rx_SetConnHardDeadTime(rxconns[nconns], 10);
684 lock_ReleaseRead(&cm_serverLock);
687 /* Perform the multi call */
689 multi_Rx(rxconns,nconns)
691 multi_VL_ProbeServer();
692 results[multi_i]=multi_error;
696 /* Process results of servers that support VL_ProbeServer */
697 for (i=0; i<nconns; i++) {
699 rx_SetConnHardDeadTime(rxconns[i], HardDeadtimeout);
700 rx_PutConnection(rxconns[i]);
701 cm_PutConn(conns[i]);
704 cm_GCConnections(tsp);
706 lock_ObtainMutex(&tsp->mx);
707 wasDown = tsp->flags & CM_SERVERFLAG_DOWN;
709 if (results[i] >= 0 || results[i] == RX_CALL_BUSY) {
710 /* mark server as up */
711 _InterlockedAnd(&tsp->flags, ~CM_SERVERFLAG_DOWN);
713 tsp->capabilities = 0;
715 afs_inet_ntoa_r(tsp->addr.sin_addr.S_un.S_addr, hoststr);
716 osi_Log3(afsd_logp, "cm_MultiPingServer server %s (%s) is up with caps 0x%x",
717 osi_LogSaveString(afsd_logp, hoststr),
718 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
723 cm_MarkServerDown(tsp, results[i], wasDown);
725 afs_inet_ntoa_r(tsp->addr.sin_addr.S_un.S_addr, hoststr);
726 osi_Log3(afsd_logp, "cm_MultiPingServer server %s (%s) is down with caps 0x%x",
727 osi_LogSaveString(afsd_logp, hoststr),
728 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
732 if (tsp->waitCount == 0)
733 _InterlockedAnd(&tsp->flags, ~CM_SERVERFLAG_PINGING);
735 osi_Wakeup((LONG_PTR)tsp);
737 lock_ReleaseMutex(&tsp->mx);
751 void cm_CheckServers(afs_uint32 flags, cm_cell_t *cellp)
758 code = RegOpenKeyEx(HKEY_LOCAL_MACHINE, AFSREG_CLT_SVC_PARAM_SUBKEY,
759 0, KEY_QUERY_VALUE, &parmKey);
760 if (code == ERROR_SUCCESS) {
761 dummyLen = sizeof(multi);
762 code = RegQueryValueEx(parmKey, "MultiCheckServers", NULL, NULL,
763 (BYTE *) &multi, &dummyLen);
764 RegCloseKey (parmKey);
768 cm_CheckServersMulti(flags, cellp);
770 cm_CheckServersSingular(flags, cellp);
773 void cm_InitServer(void)
775 static osi_once_t once;
777 if (osi_Once(&once)) {
778 lock_InitializeRWLock(&cm_serverLock, "cm_serverLock", LOCK_HIERARCHY_SERVER_GLOBAL);
779 lock_InitializeRWLock(&cm_syscfgLock, "cm_syscfgLock", LOCK_HIERARCHY_SYSCFG_GLOBAL);
784 /* Protected by cm_syscfgLock (rw) */
785 int cm_noIPAddr; /* number of client network interfaces */
786 int cm_IPAddr[CM_MAXINTERFACE_ADDR]; /* client's IP address in host order */
787 int cm_SubnetMask[CM_MAXINTERFACE_ADDR];/* client's subnet mask in host order*/
788 int cm_NetMtu[CM_MAXINTERFACE_ADDR]; /* client's MTU sizes */
789 int cm_NetFlags[CM_MAXINTERFACE_ADDR]; /* network flags */
790 int cm_LanAdapterChangeDetected = 1;
792 void cm_SetLanAdapterChangeDetected(void)
794 lock_ObtainWrite(&cm_syscfgLock);
795 cm_LanAdapterChangeDetected = 1;
796 lock_ReleaseWrite(&cm_syscfgLock);
799 void cm_GetServer(cm_server_t *serverp)
801 lock_ObtainRead(&cm_serverLock);
802 InterlockedIncrement(&serverp->refCount);
803 lock_ReleaseRead(&cm_serverLock);
806 void cm_GetServerNoLock(cm_server_t *serverp)
808 InterlockedIncrement(&serverp->refCount);
811 void cm_PutServer(cm_server_t *serverp)
814 lock_ObtainRead(&cm_serverLock);
815 refCount = InterlockedDecrement(&serverp->refCount);
816 osi_assertx(refCount >= 0, "cm_server_t refCount underflow");
817 lock_ReleaseRead(&cm_serverLock);
820 void cm_PutServerNoLock(cm_server_t *serverp)
822 afs_int32 refCount = InterlockedDecrement(&serverp->refCount);
823 osi_assertx(refCount >= 0, "cm_server_t refCount underflow");
826 void cm_SetServerNo64Bit(cm_server_t * serverp, int no64bit)
828 lock_ObtainMutex(&serverp->mx);
830 _InterlockedOr(&serverp->flags, CM_SERVERFLAG_NO64BIT);
832 _InterlockedAnd(&serverp->flags, ~CM_SERVERFLAG_NO64BIT);
833 lock_ReleaseMutex(&serverp->mx);
836 void cm_SetServerNoInlineBulk(cm_server_t * serverp, int no)
838 lock_ObtainMutex(&serverp->mx);
840 _InterlockedOr(&serverp->flags, CM_SERVERFLAG_NOINLINEBULK);
842 _InterlockedAnd(&serverp->flags, ~CM_SERVERFLAG_NOINLINEBULK);
843 lock_ReleaseMutex(&serverp->mx);
846 afs_int32 cm_UpdateIFInfo(void)
849 /* get network related info */
850 cm_noIPAddr = CM_MAXINTERFACE_ADDR;
851 code = syscfg_GetIFInfo(&cm_noIPAddr,
852 cm_IPAddr, cm_SubnetMask,
853 cm_NetMtu, cm_NetFlags);
854 cm_LanAdapterChangeDetected = 0;
858 void cm_SetServerIPRank(cm_server_t * serverp)
860 unsigned long serverAddr; /* in host byte order */
861 unsigned long myAddr, myNet, mySubnet;/* in host byte order */
862 unsigned long netMask;
866 lock_ObtainRead(&cm_syscfgLock);
867 if (cm_LanAdapterChangeDetected) {
868 lock_ConvertRToW(&cm_syscfgLock);
869 if (cm_LanAdapterChangeDetected) {
870 code = cm_UpdateIFInfo();
872 lock_ConvertWToR(&cm_syscfgLock);
875 serverAddr = ntohl(serverp->addr.sin_addr.s_addr);
876 serverp->ipRank = CM_IPRANK_LOW; /* default settings */
878 for ( i=0; i < cm_noIPAddr; i++)
880 /* loop through all the client's IP address and compare
881 ** each of them against the server's IP address */
883 myAddr = cm_IPAddr[i];
884 if ( IN_CLASSA(myAddr) )
885 netMask = IN_CLASSA_NET;
886 else if ( IN_CLASSB(myAddr) )
887 netMask = IN_CLASSB_NET;
888 else if ( IN_CLASSC(myAddr) )
889 netMask = IN_CLASSC_NET;
893 myNet = myAddr & netMask;
894 mySubnet = myAddr & cm_SubnetMask[i];
896 if ( (serverAddr & netMask) == myNet )
898 if ( (serverAddr & cm_SubnetMask[i]) == mySubnet)
900 if ( serverAddr == myAddr ) {
901 serverp->ipRank = min(serverp->ipRank,
902 CM_IPRANK_TOP);/* same machine */
904 serverp->ipRank = min(serverp->ipRank,
905 CM_IPRANK_HI); /* same subnet */
908 serverp->ipRank = min(serverp->ipRank, CM_IPRANK_MED); /* same net */
911 } /* and of for loop */
912 lock_ReleaseRead(&cm_syscfgLock);
915 cm_server_t *cm_NewServer(struct sockaddr_in *socketp, int type, cm_cell_t *cellp, afsUUID *uuidp, afs_uint32 flags) {
919 osi_assertx(socketp->sin_family == AF_INET, "unexpected socket family");
921 lock_ObtainWrite(&cm_serverLock); /* get server lock */
922 tsp = cm_FindServer(socketp, type, TRUE);
924 /* we might have found a server created by set server prefs */
925 if (uuidp && !afs_uuid_is_nil(uuidp) &&
926 !(tsp->flags & CM_SERVERFLAG_UUID))
929 _InterlockedOr(&tsp->flags, CM_SERVERFLAG_UUID);
932 if (cellp != NULL && tsp->cellp == NULL) {
934 afs_inet_ntoa_r(tsp->addr.sin_addr.s_addr, hoststr);
935 osi_Log3(afsd_logp, "cm_NewServer assigning server %s to cell (%u) %s",
936 osi_LogSaveString(afsd_logp,hoststr),
938 osi_LogSaveString(afsd_logp,cellp->name));
940 else if (tsp->cellp != cellp) {
941 afs_inet_ntoa_r(tsp->addr.sin_addr.s_addr, hoststr);
943 "cm_NewServer found a server %s associated with two cells (%u) %s and (%u) %s",
944 osi_LogSaveString(afsd_logp,hoststr),
946 osi_LogSaveString(afsd_logp,tsp->cellp->name),
948 osi_LogSaveString(afsd_logp,cellp->name));
950 lock_ReleaseWrite(&cm_serverLock);
954 tsp = malloc(sizeof(*tsp));
956 memset(tsp, 0, sizeof(*tsp));
958 if (uuidp && !afs_uuid_is_nil(uuidp)) {
960 _InterlockedOr(&tsp->flags, CM_SERVERFLAG_UUID);
963 lock_InitializeMutex(&tsp->mx, "cm_server_t mutex", LOCK_HIERARCHY_SERVER);
964 tsp->addr = *socketp;
966 osi_QAddH((osi_queue_t **)&cm_serversAllFirstp,
967 (osi_queue_t **)&cm_serversAllLastp, &tsp->allq);
980 afs_inet_ntoa_r(tsp->addr.sin_addr.s_addr, hoststr);
981 osi_Log3(afsd_logp, "cm_NewServer new server %s in cell (%u) %s",
982 osi_LogSaveString(afsd_logp,hoststr),
984 osi_LogSaveString(afsd_logp,cellp->name));
987 lock_ReleaseWrite(&cm_serverLock); /* release server lock */
990 if (!(flags & CM_FLAG_NOPROBE)) {
991 _InterlockedOr(&tsp->flags, CM_SERVERFLAG_DOWN); /* assume down; ping will mark up if available */
992 lock_ObtainMutex(&tsp->mx);
994 lock_ReleaseMutex(&tsp->mx);
995 cm_PingServer(tsp); /* Obtain Capabilities and check up/down state */
998 pthread_attr_t tattr;
1001 /* Probe the server in the background to determine if it is up or down */
1002 pthread_attr_init(&tattr);
1003 pthread_attr_setdetachstate(&tattr, PTHREAD_CREATE_DETACHED);
1005 lock_ObtainMutex(&tsp->mx);
1007 lock_ReleaseMutex(&tsp->mx);
1008 pstatus = pthread_create(&phandle, &tattr, cm_PingServer, tsp);
1010 pthread_attr_destroy(&tattr);
1017 cm_FindServerByIP(afs_uint32 ipaddr, unsigned short port, int type, int locked)
1022 lock_ObtainRead(&cm_serverLock);
1024 for (tsp = cm_serversAllFirstp;
1026 tsp = (cm_server_t *)osi_QNext(&tsp->allq)) {
1027 if (tsp->type == type &&
1028 tsp->addr.sin_addr.S_un.S_addr == ipaddr &&
1029 (tsp->addr.sin_port == port || tsp->addr.sin_port == 0))
1033 /* bump ref count if we found the server */
1035 cm_GetServerNoLock(tsp);
1038 lock_ReleaseRead(&cm_serverLock);
1044 cm_FindServerByUuid(afsUUID *serverUuid, int type, int locked)
1049 lock_ObtainRead(&cm_serverLock);
1051 for (tsp = cm_serversAllFirstp;
1053 tsp = (cm_server_t *)osi_QNext(&tsp->allq)) {
1054 if (tsp->type == type && afs_uuid_equal(&tsp->uuid, serverUuid))
1058 /* bump ref count if we found the server */
1060 cm_GetServerNoLock(tsp);
1063 lock_ReleaseRead(&cm_serverLock);
1068 /* find a server based on its properties */
1069 cm_server_t *cm_FindServer(struct sockaddr_in *addrp, int type, int locked)
1071 osi_assertx(addrp->sin_family == AF_INET, "unexpected socket value");
1073 return cm_FindServerByIP(addrp->sin_addr.s_addr, addrp->sin_port, type, locked);
1076 cm_server_vols_t *cm_NewServerVols(void) {
1077 cm_server_vols_t *tsvp;
1079 tsvp = malloc(sizeof(*tsvp));
1081 memset(tsvp, 0, sizeof(*tsvp));
1087 * cm_NewServerRef() returns with the allocated cm_serverRef_t
1088 * with a refCount of 1.
1090 cm_serverRef_t *cm_NewServerRef(cm_server_t *serverp, afs_uint32 volID)
1092 cm_serverRef_t *tsrp;
1093 cm_server_vols_t **tsrvpp = NULL;
1094 afs_uint32 *slotp = NULL;
1097 cm_GetServer(serverp);
1098 tsrp = malloc(sizeof(*tsrp));
1099 tsrp->server = serverp;
1100 tsrp->status = srv_not_busy;
1102 tsrp->volID = volID;
1105 /* if we have a non-zero volID, we need to add it to the list
1106 * of volumes maintained by the server. There are two phases:
1107 * (1) see if the volID is already in the list and (2) insert
1108 * it into the first empty slot if it is not.
1111 lock_ObtainMutex(&serverp->mx);
1113 tsrvpp = &serverp->vols;
1117 for (i=0; i<NUM_SERVER_VOLS; i++) {
1118 if ((*tsrvpp)->ids[i] == volID) {
1121 } else if (!slotp && (*tsrvpp)->ids[i] == 0) {
1122 slotp = &(*tsrvpp)->ids[i];
1129 tsrvpp = &(*tsrvpp)->nextp;
1136 /* if we didn't find an empty slot in a current
1137 * page we must need a new page */
1138 *tsrvpp = cm_NewServerVols();
1140 (*tsrvpp)->ids[0] = volID;
1144 lock_ReleaseMutex(&serverp->mx);
1150 void cm_GetServerRef(cm_serverRef_t *tsrp, int locked)
1155 lock_ObtainRead(&cm_serverLock);
1156 refCount = InterlockedIncrement(&tsrp->refCount);
1158 lock_ReleaseRead(&cm_serverLock);
1161 afs_int32 cm_PutServerRef(cm_serverRef_t *tsrp, int locked)
1166 lock_ObtainRead(&cm_serverLock);
1167 refCount = InterlockedDecrement(&tsrp->refCount);
1168 osi_assertx(refCount >= 0, "cm_serverRef_t refCount underflow");
1171 lock_ReleaseRead(&cm_serverLock);
1177 cm_ServerListSize(cm_serverRef_t* serversp)
1179 afs_uint32 count = 0;
1180 cm_serverRef_t *tsrp;
1182 lock_ObtainRead(&cm_serverLock);
1183 for (tsrp = serversp; tsrp; tsrp=tsrp->next) {
1184 if (tsrp->status == srv_deleted)
1188 lock_ReleaseRead(&cm_serverLock);
1192 LONG_PTR cm_ChecksumServerList(cm_serverRef_t *serversp)
1196 cm_serverRef_t *tsrp;
1198 lock_ObtainRead(&cm_serverLock);
1199 for (tsrp = serversp; tsrp; tsrp=tsrp->next) {
1200 if (tsrp->status == srv_deleted)
1206 sum ^= (LONG_PTR) tsrp->server;
1209 lock_ReleaseRead(&cm_serverLock);
1214 ** Insert a server into the server list keeping the list sorted in
1215 ** ascending order of ipRank.
1217 ** The refCount of the cm_serverRef_t is not altered.
1219 void cm_InsertServerList(cm_serverRef_t** list, cm_serverRef_t* element)
1221 cm_serverRef_t *current;
1222 unsigned short rank;
1224 lock_ObtainWrite(&cm_serverLock);
1226 * Since we are grabbing the serverLock exclusively remove any
1227 * deleted serverRef objects with a zero refcount before
1228 * inserting the new item.
1231 cm_serverRef_t **currentp = list;
1232 cm_serverRef_t **nextp = NULL;
1233 cm_serverRef_t * next = NULL;
1234 cm_server_t * serverp = NULL;
1236 for (currentp = list; *currentp; currentp = nextp)
1238 nextp = &(*currentp)->next;
1239 /* obtain a refcnt on next in case cm_serverLock is dropped */
1241 cm_GetServerRef(*nextp, TRUE);
1242 if ((*currentp)->refCount == 0 &&
1243 (*currentp)->status == srv_deleted) {
1246 if ((*currentp)->volID)
1247 cm_RemoveVolumeFromServer((*currentp)->server, (*currentp)->volID);
1248 serverp = (*currentp)->server;
1251 /* cm_FreeServer will drop cm_serverLock if serverp->refCount == 0 */
1252 cm_FreeServer(serverp);
1254 /* drop the next refcnt obtained above. */
1256 cm_PutServerRef(*nextp, TRUE);
1260 /* insertion into empty list or at the beginning of the list */
1263 element->next = NULL;
1269 * Now that deleted entries have been removed and we know that the
1270 * list was not empty, look for duplicates. If the element we are
1271 * inserting already exists, discard it.
1273 for ( current = *list; current; current = current->next)
1275 cm_server_t * server1 = current->server;
1276 cm_server_t * server2 = element->server;
1278 if (current->status == srv_deleted)
1281 if (server1->type != server2->type)
1284 if (server1->addr.sin_addr.s_addr != server2->addr.sin_addr.s_addr)
1287 if ((server1->flags & CM_SERVERFLAG_UUID) != (server2->flags & CM_SERVERFLAG_UUID))
1290 if ((server1->flags & CM_SERVERFLAG_UUID) &&
1291 !afs_uuid_equal(&server1->uuid, &server2->uuid))
1294 /* we must have a match, discard the new element */
1299 rank = element->server->activeRank;
1301 /* insertion at the beginning of the list */
1302 if ((*list)->server->activeRank > rank)
1304 element->next = *list;
1309 /* find appropriate place to insert */
1310 for ( current = *list; current->next; current = current->next)
1312 if ( current->next->server->activeRank > rank )
1315 element->next = current->next;
1316 current->next = element;
1319 lock_ReleaseWrite(&cm_serverLock);
1322 ** Re-sort the server list with the modified rank
1323 ** returns 0 if element was changed successfully.
1324 ** returns 1 if list remained unchanged.
1326 long cm_ChangeRankServer(cm_serverRef_t** list, cm_server_t* server)
1328 cm_serverRef_t **current;
1329 cm_serverRef_t *element;
1331 lock_ObtainWrite(&cm_serverLock);
1335 /* if there is max of one element in the list, nothing to sort */
1336 if ( (!*current) || !((*current)->next) ) {
1337 lock_ReleaseWrite(&cm_serverLock);
1338 return 1; /* list unchanged: return success */
1341 /* if the server is on the list, delete it from list */
1344 if ( (*current)->server == server)
1346 element = (*current);
1347 *current = element->next; /* delete it */
1350 current = & ( (*current)->next);
1352 lock_ReleaseWrite(&cm_serverLock);
1354 /* if this volume is not replicated on this server */
1356 return 1; /* server is not on list */
1358 /* re-insert deleted element into the list with modified rank*/
1359 cm_InsertServerList(list, element);
1364 ** If there are more than one server on the list and the first n servers on
1365 ** the list have the same rank( n>1), then randomise among the first n servers.
1367 void cm_RandomizeServer(cm_serverRef_t** list)
1370 cm_serverRef_t* tsrp, *lastTsrp;
1371 unsigned short lowestRank;
1373 lock_ObtainWrite(&cm_serverLock);
1376 /* an empty list or a list with only one element */
1377 if ( !tsrp || ! tsrp->next ) {
1378 lock_ReleaseWrite(&cm_serverLock);
1382 /* count the number of servers with the lowest rank */
1383 lowestRank = tsrp->server->activeRank;
1384 for ( count=1, tsrp=tsrp->next; tsrp; tsrp=tsrp->next)
1386 if ( tsrp->server->activeRank != lowestRank)
1392 /* if there is only one server with the lowest rank, we are done */
1394 lock_ReleaseWrite(&cm_serverLock);
1398 picked = rand() % count;
1400 lock_ReleaseWrite(&cm_serverLock);
1405 while (--picked >= 0)
1410 lastTsrp->next = tsrp->next; /* delete random element from list*/
1411 tsrp->next = *list; /* insert element at the beginning of list */
1413 lock_ReleaseWrite(&cm_serverLock);
1416 /* call cm_FreeServer while holding a write lock on cm_serverLock */
1417 void cm_FreeServer(cm_server_t* serverp)
1419 cm_server_vols_t * tsrvp, *nextp;
1422 cm_PutServerNoLock(serverp);
1423 if (serverp->refCount == 0)
1426 * we need to check to ensure that all of the connections
1427 * for this server have a 0 refCount; otherwise, they will
1428 * not be garbage collected
1430 * must drop the cm_serverLock because cm_GCConnections
1431 * obtains the cm_connLock and that comes first in the
1434 lock_ReleaseWrite(&cm_serverLock);
1435 cm_GCConnections(serverp); /* connsp */
1436 lock_ObtainWrite(&cm_serverLock);
1441 * Once we have the cm_serverLock locked check to make
1442 * sure the refCount is still zero before removing the
1445 if (serverp->refCount == 0) {
1446 if (!(serverp->flags & CM_SERVERFLAG_PREF_SET)) {
1447 osi_QRemoveHT((osi_queue_t **)&cm_serversAllFirstp,
1448 (osi_queue_t **)&cm_serversAllLastp,
1451 switch (serverp->type) {
1452 case CM_SERVER_VLDB:
1453 cm_numVldbServers--;
1455 case CM_SERVER_FILE:
1456 cm_numFileServers--;
1460 lock_FinalizeMutex(&serverp->mx);
1462 /* free the volid list */
1463 for ( tsrvp = serverp->vols; tsrvp; tsrvp = nextp) {
1464 nextp = tsrvp->nextp;
1473 /* Called with cm_serverLock write locked */
1474 void cm_RemoveVolumeFromServer(cm_server_t * serverp, afs_uint32 volID)
1476 cm_server_vols_t * tsrvp;
1482 for (tsrvp = serverp->vols; tsrvp; tsrvp = tsrvp->nextp) {
1483 for (i=0; i<NUM_SERVER_VOLS; i++) {
1484 if (tsrvp->ids[i] == volID) {
1492 int cm_IsServerListEmpty(cm_serverRef_t *serversp)
1494 cm_serverRef_t *tsrp;
1497 if (serversp == NULL)
1498 return CM_ERROR_EMPTY;
1500 lock_ObtainRead(&cm_serverLock);
1501 for (tsrp = serversp; tsrp; tsrp=tsrp->next) {
1502 if (tsrp->status == srv_deleted)
1507 lock_ReleaseRead(&cm_serverLock);
1509 return ( allDeleted ? CM_ERROR_EMPTY : 0 );
1512 void cm_FreeServerList(cm_serverRef_t** list, afs_uint32 flags)
1514 cm_serverRef_t **current;
1515 cm_serverRef_t **nextp;
1516 cm_serverRef_t * next;
1517 cm_server_t * serverp;
1520 lock_ObtainWrite(&cm_serverLock);
1530 nextp = &(*current)->next;
1531 /* obtain a refcnt on next in case cm_serverLock is dropped */
1533 cm_GetServerRef(*nextp, TRUE);
1534 refCount = cm_PutServerRef(*current, TRUE);
1535 if (refCount == 0) {
1538 if ((*current)->volID)
1539 cm_RemoveVolumeFromServer((*current)->server, (*current)->volID);
1540 serverp = (*current)->server;
1543 /* cm_FreeServer will drop cm_serverLock if serverp->refCount == 0 */
1544 cm_FreeServer(serverp);
1546 if (flags & CM_FREESERVERLIST_DELETE) {
1547 (*current)->status = srv_deleted;
1548 if ((*current)->volID)
1549 cm_RemoveVolumeFromServer((*current)->server, (*current)->volID);
1553 /* drop the next refcnt obtained above. */
1555 cm_PutServerRef(*current, TRUE);
1560 lock_ReleaseWrite(&cm_serverLock);
1563 /* dump all servers to a file.
1564 * cookie is used to identify this batch for easy parsing,
1565 * and it a string provided by a caller
1567 int cm_DumpServers(FILE *outputFile, char *cookie, int lock)
1576 lock_ObtainRead(&cm_serverLock);
1579 "%s - dumping servers - cm_numFileServers=%d, cm_numVldbServers=%d\r\n",
1580 cookie, cm_numFileServers, cm_numVldbServers);
1581 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1583 for (tsp = cm_serversAllFirstp;
1585 tsp = (cm_server_t *)osi_QNext(&tsp->allq))
1590 switch (tsp->type) {
1591 case CM_SERVER_VLDB:
1594 case CM_SERVER_FILE:
1601 afsUUID_to_string(&tsp->uuid, uuidstr, sizeof(uuidstr));
1602 afs_inet_ntoa_r(tsp->addr.sin_addr.s_addr, hoststr);
1603 down = ctime(&tsp->downTime);
1604 down[strlen(down)-1] = '\0';
1607 "%s - tsp=0x%p cell=%s addr=%-15s port=%u uuid=%s type=%s caps=0x%x "
1608 "flags=0x%x waitCount=%u rank=%u downTime=\"%s\" refCount=%u\r\n",
1609 cookie, tsp, tsp->cellp ? tsp->cellp->name : "", hoststr,
1610 ntohs(tsp->addr.sin_port), uuidstr, type,
1611 tsp->capabilities, tsp->flags, tsp->waitCount, tsp->activeRank,
1612 (tsp->flags & CM_SERVERFLAG_DOWN) ? "down" : "up",
1614 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1616 sprintf(output, "%s - Done dumping servers.\r\n", cookie);
1617 WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
1620 lock_ReleaseRead(&cm_serverLock);
1626 * Determine if two servers are in fact the same.
1628 * Returns 1 if they match, 0 if they do not
1630 int cm_ServerEqual(cm_server_t *srv1, cm_server_t *srv2)
1634 if (srv1 == NULL || srv2 == NULL)
1640 if (srv1->flags & CM_SERVERFLAG_UUID) {
1641 if (!(srv2->flags & CM_SERVERFLAG_UUID))
1644 /* Both support UUID */
1645 if (UuidEqual((UUID *)&srv1->uuid, (UUID *)&srv2->uuid, &status))
1648 if (srv2->flags & CM_SERVERFLAG_UUID)
1651 /* Neither support UUID so perform an addr/port comparison */
1652 if ( srv1->addr.sin_family == srv2->addr.sin_family &&
1653 srv1->addr.sin_addr.s_addr == srv2->addr.sin_addr.s_addr &&
1654 srv1->addr.sin_port == srv2->addr.sin_port )