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 <afs/param.h>
21 #include <WINNT\syscfg.h>
25 osi_rwlock_t cm_serverLock;
27 cm_server_t *cm_allServersp;
28 afs_uint32 cm_numFileServers = 0;
29 afs_uint32 cm_numVldbServers = 0;
32 cm_ForceNewConnectionsAllServers(void)
36 lock_ObtainRead(&cm_serverLock);
37 for (tsp = cm_allServersp; tsp; tsp = tsp->allNextp) {
38 cm_GetServerNoLock(tsp);
39 cm_ForceNewConnections(tsp);
40 cm_PutServerNoLock(tsp);
42 lock_ReleaseRead(&cm_serverLock);
46 cm_PingServer(cm_server_t *tsp)
51 struct rx_connection * rxconnp;
54 Capabilities caps = {0, 0};
58 lock_ObtainMutex(&tsp->mx);
59 if (tsp->flags & CM_SERVERFLAG_PINGING) {
61 osi_SleepM((LONG_PTR)tsp, &tsp->mx);
62 lock_ObtainMutex(&tsp->mx);
64 if (tsp->waitCount == 0)
65 tsp->flags &= ~CM_SERVERFLAG_PINGING;
67 osi_Wakeup((LONG_PTR)tsp);
68 lock_ReleaseMutex(&tsp->mx);
71 tsp->flags |= CM_SERVERFLAG_PINGING;
72 wasDown = tsp->flags & CM_SERVERFLAG_DOWN;
73 afs_inet_ntoa_r(tsp->addr.sin_addr.S_un.S_addr, hoststr);
74 lock_ReleaseMutex(&tsp->mx);
76 code = cm_ConnByServer(tsp, cm_rootUserp, &connp);
78 /* now call the appropriate ping call. Drop the timeout if
79 * the server is known to be down, so that we don't waste a
80 * lot of time retiming out down servers.
83 osi_Log4(afsd_logp, "cm_PingServer server %s (%s) was %s with caps 0x%x",
84 osi_LogSaveString(afsd_logp, hoststr),
85 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
86 wasDown ? "down" : "up",
89 rxconnp = cm_GetRxConn(connp);
91 rx_SetConnDeadTime(rxconnp, 10);
92 if (tsp->type == CM_SERVER_VLDB) {
93 code = VL_ProbeServer(rxconnp);
97 code = RXAFS_GetCapabilities(rxconnp, &caps);
98 if (code == RXGEN_OPCODE)
99 code = RXAFS_GetTime(rxconnp, &secs, &usecs);
102 rx_SetConnDeadTime(rxconnp, ConnDeadtimeout);
103 rx_PutConnection(rxconnp);
105 } /* got an unauthenticated connection to this server */
107 lock_ObtainMutex(&tsp->mx);
109 /* mark server as up */
110 tsp->flags &= ~CM_SERVERFLAG_DOWN;
113 /* we currently handle 32-bits of capabilities */
114 if (caps.Capabilities_len > 0) {
115 tsp->capabilities = caps.Capabilities_val[0];
116 free(caps.Capabilities_val);
117 caps.Capabilities_len = 0;
118 caps.Capabilities_val = 0;
120 tsp->capabilities = 0;
123 osi_Log3(afsd_logp, "cm_PingServer server %s (%s) is up with caps 0x%x",
124 osi_LogSaveString(afsd_logp, hoststr),
125 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
128 /* Now update the volume status if necessary */
130 cm_server_vols_t * tsrvp;
134 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
135 for (i=0; i<NUM_SERVER_VOLS; i++) {
136 if (tsrvp->ids[i] != 0) {
139 lock_ReleaseMutex(&tsp->mx);
140 code = cm_GetVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
141 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE, &volp);
142 lock_ObtainMutex(&tsp->mx);
144 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
152 /* mark server as down */
153 if (!(tsp->flags & CM_SERVERFLAG_DOWN)) {
154 tsp->flags |= CM_SERVERFLAG_DOWN;
155 tsp->downTime = time(NULL);
157 if (code != VRESTARTING)
158 cm_ForceNewConnections(tsp);
160 osi_Log3(afsd_logp, "cm_PingServer server %s (%s) is down with caps 0x%x",
161 osi_LogSaveString(afsd_logp, hoststr),
162 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
165 /* Now update the volume status if necessary */
167 cm_server_vols_t * tsrvp;
171 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
172 for (i=0; i<NUM_SERVER_VOLS; i++) {
173 if (tsrvp->ids[i] != 0) {
176 lock_ReleaseMutex(&tsp->mx);
177 code = cm_GetVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
178 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE, &volp);
179 lock_ObtainMutex(&tsp->mx);
181 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
190 if (tsp->waitCount == 0)
191 tsp->flags &= ~CM_SERVERFLAG_PINGING;
193 osi_Wakeup((LONG_PTR)tsp);
194 lock_ReleaseMutex(&tsp->mx);
197 #define MULTI_CHECKSERVERS 1
198 #ifndef MULTI_CHECKSERVERS
199 void cm_CheckServers(afs_uint32 flags, cm_cell_t *cellp)
201 /* ping all file servers, up or down, with unauthenticated connection,
202 * to find out whether we have all our callbacks from the server still.
203 * Also, ping down VLDBs.
210 lock_ObtainRead(&cm_serverLock);
211 for (tsp = cm_allServersp; tsp; tsp = tsp->allNextp) {
212 cm_GetServerNoLock(tsp);
213 lock_ReleaseRead(&cm_serverLock);
215 /* now process the server */
216 lock_ObtainMutex(&tsp->mx);
219 isDown = tsp->flags & CM_SERVERFLAG_DOWN;
220 isFS = tsp->type == CM_SERVER_FILE;
222 /* only do the ping if the cell matches the requested cell, or we're
223 * matching all cells (cellp == NULL), and if we've requested to ping
224 * this type of {up, down} servers.
226 if ((cellp == NULL || cellp == tsp->cellp) &&
227 ((isDown && (flags & CM_FLAG_CHECKDOWNSERVERS)) ||
228 (!isDown && (flags & CM_FLAG_CHECKUPSERVERS))) &&
229 ((!(flags & CM_FLAG_CHECKVLDBSERVERS) ||
230 !isFS && (flags & CM_FLAG_CHECKVLDBSERVERS)) &&
231 (!(flags & CM_FLAG_CHECKFILESERVERS) ||
232 isFS && (flags & CM_FLAG_CHECKFILESERVERS)))) {
234 } /* we're supposed to check this up/down server */
235 lock_ReleaseMutex(&tsp->mx);
237 /* at this point, we've adjusted the server state, so do the ping and
243 /* also, run the GC function for connections on all of the
244 * server's connections.
246 cm_GCConnections(tsp);
248 lock_ObtainRead(&cm_serverLock);
249 cm_PutServerNoLock(tsp);
251 lock_ReleaseRead(&cm_serverLock);
253 #else /* MULTI_CHECKSERVERS */
254 void cm_CheckServers(afs_uint32 flags, cm_cell_t *cellp)
257 * The goal of this function is to probe simultaneously
258 * probe all of the up/down servers (vldb/file) as
259 * specified by flags in the minimum number of RPCs.
260 * Effectively that means use one multi_RXAFS_GetCapabilities()
261 * followed by possibly one multi_RXAFS_GetTime() and
262 * one multi_VL_ProbeServer().
264 * To make this work we must construct the list of vldb
265 * and file servers that are to be probed as well as the
266 * associated data structures.
269 int srvAddrCount = 0;
270 struct srvAddr **addrs = NULL;
271 cm_conn_t **conns = NULL;
272 struct rx_connection **rxconns = NULL;
274 afs_int32 i, j, nconns = 0;
275 afs_int32 *conntimer, *results;
276 Capabilities *caps = NULL;
277 cm_server_t ** serversp, *tsp;
278 afs_uint32 isDown, wasDown;
280 time_t start, end, *deltas;
287 j = max(cm_numFileServers,cm_numVldbServers);
288 conns = (cm_conn_t **)malloc(j * sizeof(cm_conn_t *));
289 rxconns = (struct rx_connection **)malloc(j * sizeof(struct rx_connection *));
290 conntimer = (afs_int32 *)malloc(j * sizeof (afs_int32));
291 deltas = (time_t *)malloc(j * sizeof (time_t));
292 results = (afs_int32 *)malloc(j * sizeof (afs_int32));
293 serversp = (cm_server_t **)malloc(j * sizeof(cm_server_t *));
294 caps = (Capabilities *)malloc(j * sizeof(Capabilities));
296 memset(caps, 0, j * sizeof(Capabilities));
298 if ((flags & CM_FLAG_CHECKFILESERVERS) ||
299 !(flags & (CM_FLAG_CHECKFILESERVERS|CM_FLAG_CHECKVLDBSERVERS)))
301 lock_ObtainRead(&cm_serverLock);
303 for (nconns=0, tsp = cm_allServersp; tsp; tsp = tsp->allNextp) {
304 if (tsp->type != CM_SERVER_FILE ||
305 tsp->cellp == NULL || /* SetPref only */
306 cellp && cellp != tsp->cellp)
309 cm_GetServerNoLock(tsp);
310 lock_ReleaseRead(&cm_serverLock);
312 lock_ObtainMutex(&tsp->mx);
313 isDown = tsp->flags & CM_SERVERFLAG_DOWN;
315 if ((tsp->flags & CM_SERVERFLAG_PINGING) ||
316 !((isDown && (flags & CM_FLAG_CHECKDOWNSERVERS)) ||
317 (!isDown && (flags & CM_FLAG_CHECKUPSERVERS)))) {
318 lock_ReleaseMutex(&tsp->mx);
319 lock_ObtainRead(&cm_serverLock);
320 cm_PutServerNoLock(tsp);
324 tsp->flags |= CM_SERVERFLAG_PINGING;
325 lock_ReleaseMutex(&tsp->mx);
327 serversp[nconns] = tsp;
328 code = cm_ConnByServer(tsp, cm_rootUserp, &conns[nconns]);
330 lock_ObtainRead(&cm_serverLock);
331 cm_PutServerNoLock(tsp);
334 lock_ObtainRead(&cm_serverLock);
335 rxconns[nconns] = cm_GetRxConn(conns[nconns]);
336 if (conntimer[nconns] = (isDown ? 1 : 0))
337 rx_SetConnDeadTime(rxconns[nconns], 10);
341 lock_ReleaseRead(&cm_serverLock);
344 /* Perform the multi call */
346 multi_Rx(rxconns,nconns)
348 multi_RXAFS_GetCapabilities(&caps[multi_i]);
349 results[multi_i]=multi_error;
353 /* Process results of servers that support RXAFS_GetCapabilities */
354 for (i=0; i<nconns; i++) {
355 /* Leave the servers that did not support GetCapabilities alone */
356 if (results[i] == RXGEN_OPCODE)
360 rx_SetConnDeadTime(rxconns[i], ConnDeadtimeout);
361 rx_PutConnection(rxconns[i]);
362 cm_PutConn(conns[i]);
365 cm_GCConnections(tsp);
367 lock_ObtainMutex(&tsp->mx);
368 wasDown = tsp->flags & CM_SERVERFLAG_DOWN;
370 if (results[i] >= 0) {
371 /* mark server as up */
372 tsp->flags &= ~CM_SERVERFLAG_DOWN;
375 /* we currently handle 32-bits of capabilities */
376 if (caps[i].Capabilities_len > 0) {
377 tsp->capabilities = caps[i].Capabilities_val[0];
378 free(caps[i].Capabilities_val);
379 caps[i].Capabilities_len = 0;
380 caps[i].Capabilities_val = 0;
382 tsp->capabilities = 0;
385 afs_inet_ntoa_r(tsp->addr.sin_addr.S_un.S_addr, hoststr);
386 osi_Log3(afsd_logp, "cm_MultiPingServer server %s (%s) is up with caps 0x%x",
387 osi_LogSaveString(afsd_logp, hoststr),
388 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
391 /* Now update the volume status if necessary */
393 cm_server_vols_t * tsrvp;
397 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
398 for (i=0; i<NUM_SERVER_VOLS; i++) {
399 if (tsrvp->ids[i] != 0) {
402 lock_ReleaseMutex(&tsp->mx);
403 code = cm_GetVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
404 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE, &volp);
405 lock_ObtainMutex(&tsp->mx);
407 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
415 /* mark server as down */
416 if (!(tsp->flags & CM_SERVERFLAG_DOWN)) {
417 tsp->flags |= CM_SERVERFLAG_DOWN;
418 tsp->downTime = time(NULL);
420 if (code != VRESTARTING)
421 cm_ForceNewConnections(tsp);
423 afs_inet_ntoa_r(tsp->addr.sin_addr.S_un.S_addr, hoststr);
424 osi_Log3(afsd_logp, "cm_MultiPingServer server %s (%s) is down with caps 0x%x",
425 osi_LogSaveString(afsd_logp, hoststr),
426 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
429 /* Now update the volume status if necessary */
431 cm_server_vols_t * tsrvp;
435 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
436 for (i=0; i<NUM_SERVER_VOLS; i++) {
437 if (tsrvp->ids[i] != 0) {
440 lock_ReleaseMutex(&tsp->mx);
441 code = cm_GetVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
442 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE, &volp);
443 lock_ObtainMutex(&tsp->mx);
445 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
454 if (tsp->waitCount == 0)
455 tsp->flags &= ~CM_SERVERFLAG_PINGING;
457 osi_Wakeup((LONG_PTR)tsp);
459 lock_ReleaseMutex(&tsp->mx);
465 * At this point we have handled any responses that did not indicate
466 * that RXAFS_GetCapabilities is not supported.
468 for ( i=0, j=0; i<nconns; i++) {
469 if (results[i] == RXGEN_OPCODE) {
472 rxconns[j] = rxconns[i];
473 serversp[j] = serversp[i];
481 /* Perform the multi call */
483 multi_Rx(rxconns,nconns)
486 multi_RXAFS_GetTime(&secs, &usecs);
488 results[multi_i]=multi_error;
489 if ((start == end) && !multi_error)
490 deltas[multi_i] = end - secs;
494 /* Process Results of servers that only support RXAFS_GetTime */
495 for (i=0; i<nconns; i++) {
496 /* Leave the servers that did not support GetCapabilities alone */
498 rx_SetConnDeadTime(rxconns[i], ConnDeadtimeout);
499 rx_PutConnection(rxconns[i]);
500 cm_PutConn(conns[i]);
503 cm_GCConnections(tsp);
505 lock_ObtainMutex(&tsp->mx);
506 wasDown = tsp->flags & CM_SERVERFLAG_DOWN;
508 if (results[i] >= 0) {
509 /* mark server as up */
510 tsp->flags &= ~CM_SERVERFLAG_DOWN;
512 tsp->capabilities = 0;
514 afs_inet_ntoa_r(tsp->addr.sin_addr.S_un.S_addr, hoststr);
515 osi_Log3(afsd_logp, "cm_MultiPingServer server %s (%s) is up with caps 0x%x",
516 osi_LogSaveString(afsd_logp, hoststr),
517 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
520 /* Now update the volume status if necessary */
522 cm_server_vols_t * tsrvp;
526 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
527 for (i=0; i<NUM_SERVER_VOLS; i++) {
528 if (tsrvp->ids[i] != 0) {
531 lock_ReleaseMutex(&tsp->mx);
532 code = cm_GetVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
533 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE, &volp);
534 lock_ObtainMutex(&tsp->mx);
536 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
544 /* mark server as down */
545 if (!(tsp->flags & CM_SERVERFLAG_DOWN)) {
546 tsp->flags |= CM_SERVERFLAG_DOWN;
547 tsp->downTime = time(NULL);
549 if (code != VRESTARTING)
550 cm_ForceNewConnections(tsp);
552 afs_inet_ntoa_r(tsp->addr.sin_addr.S_un.S_addr, hoststr);
553 osi_Log3(afsd_logp, "cm_MultiPingServer server %s (%s) is down with caps 0x%x",
554 osi_LogSaveString(afsd_logp, hoststr),
555 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
558 /* Now update the volume status if necessary */
560 cm_server_vols_t * tsrvp;
564 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
565 for (i=0; i<NUM_SERVER_VOLS; i++) {
566 if (tsrvp->ids[i] != 0) {
569 lock_ReleaseMutex(&tsp->mx);
570 code = cm_GetVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
571 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE, &volp);
572 lock_ObtainMutex(&tsp->mx);
574 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
583 if (tsp->waitCount == 0)
584 tsp->flags &= ~CM_SERVERFLAG_PINGING;
586 osi_Wakeup((LONG_PTR)tsp);
588 lock_ReleaseMutex(&tsp->mx);
594 if ((flags & CM_FLAG_CHECKVLDBSERVERS) ||
595 !(flags & (CM_FLAG_CHECKFILESERVERS|CM_FLAG_CHECKVLDBSERVERS)))
597 lock_ObtainRead(&cm_serverLock);
599 for (nconns=0, tsp = cm_allServersp; tsp; tsp = tsp->allNextp) {
600 if (tsp->type != CM_SERVER_VLDB ||
601 tsp->cellp == NULL || /* SetPref only */
602 cellp && cellp != tsp->cellp)
605 cm_GetServerNoLock(tsp);
606 lock_ReleaseRead(&cm_serverLock);
608 lock_ObtainMutex(&tsp->mx);
609 isDown = tsp->flags & CM_SERVERFLAG_DOWN;
611 if ((tsp->flags & CM_SERVERFLAG_PINGING) ||
612 !((isDown && (flags & CM_FLAG_CHECKDOWNSERVERS)) ||
613 (!isDown && (flags & CM_FLAG_CHECKUPSERVERS)))) {
614 lock_ReleaseMutex(&tsp->mx);
615 lock_ObtainRead(&cm_serverLock);
616 cm_PutServerNoLock(tsp);
620 tsp->flags |= CM_SERVERFLAG_PINGING;
621 lock_ReleaseMutex(&tsp->mx);
623 serversp[nconns] = tsp;
624 code = cm_ConnByServer(tsp, cm_rootUserp, &conns[nconns]);
626 lock_ObtainRead(&cm_serverLock);
627 cm_PutServerNoLock(tsp);
630 lock_ObtainRead(&cm_serverLock);
631 rxconns[nconns] = cm_GetRxConn(conns[nconns]);
632 conntimer[nconns] = (isDown ? 1 : 0);
634 rx_SetConnDeadTime(rxconns[nconns], 10);
638 lock_ReleaseRead(&cm_serverLock);
641 /* Perform the multi call */
643 multi_Rx(rxconns,nconns)
645 multi_VL_ProbeServer();
646 results[multi_i]=multi_error;
650 /* Process results of servers that support RXAFS_GetCapabilities */
651 for (i=0; i<nconns; i++) {
653 rx_SetConnDeadTime(rxconns[i], ConnDeadtimeout);
654 rx_PutConnection(rxconns[i]);
655 cm_PutConn(conns[i]);
658 cm_GCConnections(tsp);
660 lock_ObtainMutex(&tsp->mx);
661 wasDown = tsp->flags & CM_SERVERFLAG_DOWN;
663 if (results[i] >= 0) {
664 /* mark server as up */
665 tsp->flags &= ~CM_SERVERFLAG_DOWN;
667 tsp->capabilities = 0;
669 afs_inet_ntoa_r(tsp->addr.sin_addr.S_un.S_addr, hoststr);
670 osi_Log3(afsd_logp, "cm_MultiPingServer server %s (%s) is up with caps 0x%x",
671 osi_LogSaveString(afsd_logp, hoststr),
672 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
675 /* Now update the volume status if necessary */
677 cm_server_vols_t * tsrvp;
681 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
682 for (i=0; i<NUM_SERVER_VOLS; i++) {
683 if (tsrvp->ids[i] != 0) {
686 lock_ReleaseMutex(&tsp->mx);
687 code = cm_GetVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
688 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE, &volp);
689 lock_ObtainMutex(&tsp->mx);
691 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
699 /* mark server as down */
700 if (!(tsp->flags & CM_SERVERFLAG_DOWN)) {
701 tsp->flags |= CM_SERVERFLAG_DOWN;
702 tsp->downTime = time(NULL);
704 if (code != VRESTARTING)
705 cm_ForceNewConnections(tsp);
707 afs_inet_ntoa_r(tsp->addr.sin_addr.S_un.S_addr, hoststr);
708 osi_Log3(afsd_logp, "cm_MultiPingServer server %s (%s) is down with caps 0x%x",
709 osi_LogSaveString(afsd_logp, hoststr),
710 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
713 /* Now update the volume status if necessary */
715 cm_server_vols_t * tsrvp;
719 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
720 for (i=0; i<NUM_SERVER_VOLS; i++) {
721 if (tsrvp->ids[i] != 0) {
724 lock_ReleaseMutex(&tsp->mx);
725 code = cm_GetVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
726 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE, &volp);
727 lock_ObtainMutex(&tsp->mx);
729 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
738 if (tsp->waitCount == 0)
739 tsp->flags &= ~CM_SERVERFLAG_PINGING;
741 osi_Wakeup((LONG_PTR)tsp);
743 lock_ReleaseMutex(&tsp->mx);
756 #endif /* MULTI_CHECKSERVERS */
758 void cm_InitServer(void)
760 static osi_once_t once;
762 if (osi_Once(&once)) {
763 lock_InitializeRWLock(&cm_serverLock, "cm_serverLock");
768 void cm_GetServer(cm_server_t *serverp)
770 lock_ObtainRead(&cm_serverLock);
771 InterlockedIncrement(&serverp->refCount);
772 lock_ReleaseRead(&cm_serverLock);
775 void cm_GetServerNoLock(cm_server_t *serverp)
777 InterlockedIncrement(&serverp->refCount);
780 void cm_PutServer(cm_server_t *serverp)
783 lock_ObtainRead(&cm_serverLock);
784 refCount = InterlockedDecrement(&serverp->refCount);
785 osi_assertx(refCount >= 0, "cm_server_t refCount underflow");
786 lock_ReleaseRead(&cm_serverLock);
789 void cm_PutServerNoLock(cm_server_t *serverp)
791 afs_int32 refCount = InterlockedDecrement(&serverp->refCount);
792 osi_assertx(refCount >= 0, "cm_server_t refCount underflow");
795 void cm_SetServerNo64Bit(cm_server_t * serverp, int no64bit)
797 lock_ObtainMutex(&serverp->mx);
799 serverp->flags |= CM_SERVERFLAG_NO64BIT;
801 serverp->flags &= ~CM_SERVERFLAG_NO64BIT;
802 lock_ReleaseMutex(&serverp->mx);
805 void cm_SetServerNoInlineBulk(cm_server_t * serverp, int no)
807 lock_ObtainMutex(&serverp->mx);
809 serverp->flags |= CM_SERVERFLAG_NOINLINEBULK;
811 serverp->flags &= ~CM_SERVERFLAG_NOINLINEBULK;
812 lock_ReleaseMutex(&serverp->mx);
815 void cm_SetServerPrefs(cm_server_t * serverp)
817 unsigned long serverAddr; /* in host byte order */
818 unsigned long myAddr, myNet, mySubnet;/* in host byte order */
819 unsigned long netMask;
822 int cm_noIPAddr; /* number of client network interfaces */
823 int cm_IPAddr[CM_MAXINTERFACE_ADDR]; /* client's IP address in host order */
824 int cm_SubnetMask[CM_MAXINTERFACE_ADDR];/* client's subnet mask in host order*/
825 int cm_NetMtu[CM_MAXINTERFACE_ADDR]; /* client's MTU sizes */
826 int cm_NetFlags[CM_MAXINTERFACE_ADDR]; /* network flags */
829 /* get network related info */
830 cm_noIPAddr = CM_MAXINTERFACE_ADDR;
831 code = syscfg_GetIFInfo(&cm_noIPAddr,
832 cm_IPAddr, cm_SubnetMask,
833 cm_NetMtu, cm_NetFlags);
835 serverAddr = ntohl(serverp->addr.sin_addr.s_addr);
836 serverp->ipRank = CM_IPRANK_LOW; /* default setings */
838 for ( i=0; i < cm_noIPAddr; i++)
840 /* loop through all the client's IP address and compare
841 ** each of them against the server's IP address */
843 myAddr = cm_IPAddr[i];
844 if ( IN_CLASSA(myAddr) )
845 netMask = IN_CLASSA_NET;
846 else if ( IN_CLASSB(myAddr) )
847 netMask = IN_CLASSB_NET;
848 else if ( IN_CLASSC(myAddr) )
849 netMask = IN_CLASSC_NET;
853 myNet = myAddr & netMask;
854 mySubnet = myAddr & cm_SubnetMask[i];
856 if ( (serverAddr & netMask) == myNet )
858 if ( (serverAddr & cm_SubnetMask[i]) == mySubnet)
860 if ( serverAddr == myAddr )
861 serverp->ipRank = min(serverp->ipRank,
862 CM_IPRANK_TOP);/* same machine */
863 else serverp->ipRank = min(serverp->ipRank,
864 CM_IPRANK_HI); /* same subnet */
866 else serverp->ipRank = min(serverp->ipRank,CM_IPRANK_MED);
869 /* random between 0..15*/
870 serverp->ipRank += min(serverp->ipRank, rand() % 0x000f);
871 } /* and of for loop */
874 cm_server_t *cm_NewServer(struct sockaddr_in *socketp, int type, cm_cell_t *cellp, afs_uint32 flags) {
877 osi_assertx(socketp->sin_family == AF_INET, "unexpected socket family");
879 tsp = malloc(sizeof(*tsp));
881 memset(tsp, 0, sizeof(*tsp));
885 lock_InitializeMutex(&tsp->mx, "cm_server_t mutex");
886 tsp->addr = *socketp;
888 cm_SetServerPrefs(tsp);
890 lock_ObtainWrite(&cm_serverLock); /* get server lock */
891 tsp->allNextp = cm_allServersp;
892 cm_allServersp = tsp;
903 lock_ReleaseWrite(&cm_serverLock); /* release server lock */
905 if ( !(flags & CM_FLAG_NOPROBE) ) {
906 tsp->flags = CM_SERVERFLAG_DOWN; /* assume down; ping will mark up if available */
907 cm_PingServer(tsp); /* Obtain Capabilities and check up/down state */
914 cm_FindServerByIP(afs_uint32 ipaddr, int type)
918 lock_ObtainRead(&cm_serverLock);
919 for (tsp = cm_allServersp; tsp; tsp = tsp->allNextp) {
920 if (tsp->type == type &&
921 tsp->addr.sin_addr.S_un.S_addr == ipaddr)
924 lock_ReleaseRead(&cm_serverLock);
929 /* find a server based on its properties */
930 cm_server_t *cm_FindServer(struct sockaddr_in *addrp, int type)
934 osi_assertx(addrp->sin_family == AF_INET, "unexpected socket value");
936 lock_ObtainRead(&cm_serverLock);
937 for (tsp = cm_allServersp; tsp; tsp=tsp->allNextp) {
938 if (tsp->type == type &&
939 tsp->addr.sin_addr.s_addr == addrp->sin_addr.s_addr)
943 /* bump ref count if we found the server */
945 cm_GetServerNoLock(tsp);
947 /* drop big table lock */
948 lock_ReleaseRead(&cm_serverLock);
950 /* return what we found */
954 cm_server_vols_t *cm_NewServerVols(void) {
955 cm_server_vols_t *tsvp;
957 tsvp = malloc(sizeof(*tsvp));
959 memset(tsvp, 0, sizeof(*tsvp));
964 cm_serverRef_t *cm_NewServerRef(cm_server_t *serverp, afs_uint32 volID)
966 cm_serverRef_t *tsrp;
967 cm_server_vols_t **tsrvpp = NULL;
968 afs_uint32 *slotp = NULL;
971 cm_GetServer(serverp);
972 tsrp = malloc(sizeof(*tsrp));
973 tsrp->server = serverp;
974 tsrp->status = srv_not_busy;
979 /* if we have a non-zero volID, we need to add it to the list
980 * of volumes maintained by the server. There are two phases:
981 * (1) see if the volID is already in the list and (2) insert
982 * it into the first empty slot if it is not.
985 lock_ObtainMutex(&serverp->mx);
987 tsrvpp = &serverp->vols;
991 for (i=0; i<NUM_SERVER_VOLS; i++) {
992 if ((*tsrvpp)->ids[i] == volID) {
995 } else if (!slotp && (*tsrvpp)->ids[i] == 0) {
996 slotp = &(*tsrvpp)->ids[i];
1003 tsrvpp = &(*tsrvpp)->nextp;
1010 /* if we didn't find an empty slot in a current
1011 * page we must need a new page */
1012 *tsrvpp = cm_NewServerVols();
1014 (*tsrvpp)->ids[0] = volID;
1018 lock_ReleaseMutex(&serverp->mx);
1024 LONG_PTR cm_ChecksumServerList(cm_serverRef_t *serversp)
1028 cm_serverRef_t *tsrp;
1030 lock_ObtainRead(&cm_serverLock);
1031 for (tsrp = serversp; tsrp; tsrp=tsrp->next) {
1036 sum ^= (LONG_PTR) tsrp->server;
1039 lock_ReleaseRead(&cm_serverLock);
1044 ** Insert a server into the server list keeping the list sorted in
1045 ** ascending order of ipRank.
1047 ** The refCount of the cm_serverRef_t is increased
1049 void cm_InsertServerList(cm_serverRef_t** list, cm_serverRef_t* element)
1051 cm_serverRef_t *current=*list;
1052 unsigned short ipRank = element->server->ipRank;
1054 lock_ObtainWrite(&cm_serverLock);
1055 element->refCount++; /* increase refCount */
1057 /* insertion into empty list or at the beginning of the list */
1058 if ( !current || (current->server->ipRank > ipRank) )
1060 element->next = *list;
1062 lock_ReleaseWrite(&cm_serverLock);
1066 while ( current->next ) /* find appropriate place to insert */
1068 if ( current->next->server->ipRank > ipRank )
1070 else current = current->next;
1072 element->next = current->next;
1073 current->next = element;
1074 lock_ReleaseWrite(&cm_serverLock);
1077 ** Re-sort the server list with the modified rank
1078 ** returns 0 if element was changed successfully.
1079 ** returns 1 if list remained unchanged.
1081 long cm_ChangeRankServer(cm_serverRef_t** list, cm_server_t* server)
1083 cm_serverRef_t **current=list;
1084 cm_serverRef_t *element=0;
1086 /* if there is max of one element in the list, nothing to sort */
1087 if ( (!*current) || !((*current)->next) )
1088 return 1; /* list unchanged: return success */
1090 lock_ObtainWrite(&cm_serverLock);
1091 /* if the server is on the list, delete it from list */
1094 if ( (*current)->server == server)
1096 element = (*current);
1097 *current = (*current)->next; /* delete it */
1100 current = & ( (*current)->next);
1102 lock_ReleaseWrite(&cm_serverLock);
1104 /* if this volume is not replicated on this server */
1106 return 1; /* server is not on list */
1108 /* re-insert deleted element into the list with modified rank*/
1109 cm_InsertServerList(list, element);
1111 /* reduce refCount which was increased by cm_InsertServerList */
1112 lock_ObtainWrite(&cm_serverLock);
1113 element->refCount--;
1114 lock_ReleaseWrite(&cm_serverLock);
1118 ** If there are more than one server on the list and the first n servers on
1119 ** the list have the same rank( n>1), then randomise among the first n servers.
1121 void cm_RandomizeServer(cm_serverRef_t** list)
1124 cm_serverRef_t* tsrp = *list, *lastTsrp;
1125 unsigned short lowestRank;
1127 /* an empty list or a list with only one element */
1128 if ( !tsrp || ! tsrp->next )
1131 lock_ObtainWrite(&cm_serverLock);
1133 /* count the number of servers with the lowest rank */
1134 lowestRank = tsrp->server->ipRank;
1135 for ( count=1, tsrp=tsrp->next; tsrp; tsrp=tsrp->next)
1137 if ( tsrp->server->ipRank != lowestRank)
1143 /* if there is only one server with the lowest rank, we are done */
1145 lock_ReleaseWrite(&cm_serverLock);
1149 picked = rand() % count;
1151 lock_ReleaseWrite(&cm_serverLock);
1156 while (--picked >= 0)
1161 lastTsrp->next = tsrp->next; /* delete random element from list*/
1162 tsrp->next = *list; /* insert element at the beginning of list */
1164 lock_ReleaseWrite(&cm_serverLock);
1167 /* call cm_FreeServer while holding a write lock on cm_serverLock */
1168 void cm_FreeServer(cm_server_t* serverp)
1170 cm_server_vols_t * tsrvp, *nextp;
1172 cm_PutServerNoLock(serverp);
1173 if (serverp->refCount == 0)
1175 /* we need to check to ensure that all of the connections
1176 * for this server have a 0 refCount; otherwise, they will
1177 * not be garbage collected
1179 cm_GCConnections(serverp); /* connsp */
1181 if (!(serverp->flags & CM_SERVERFLAG_PREF_SET)) {
1182 switch (serverp->type) {
1183 case CM_SERVER_VLDB:
1184 cm_numVldbServers--;
1186 case CM_SERVER_FILE:
1187 cm_numFileServers--;
1191 lock_FinalizeMutex(&serverp->mx);
1192 if ( cm_allServersp == serverp )
1193 cm_allServersp = serverp->allNextp;
1197 for(tsp = cm_allServersp; tsp->allNextp; tsp=tsp->allNextp) {
1198 if ( tsp->allNextp == serverp ) {
1199 tsp->allNextp = serverp->allNextp;
1205 /* free the volid list */
1206 for ( tsrvp = serverp->vols; tsrvp; tsrvp = nextp) {
1207 nextp = tsrvp->nextp;
1216 void cm_RemoveVolumeFromServer(cm_server_t * serverp, afs_uint32 volID)
1218 cm_server_vols_t * tsrvp;
1224 for (tsrvp = serverp->vols; tsrvp; tsrvp = tsrvp->nextp) {
1225 for (i=0; i<NUM_SERVER_VOLS; i++) {
1226 if (tsrvp->ids[i] == volID) {
1234 void cm_FreeServerList(cm_serverRef_t** list, afs_uint32 flags)
1236 cm_serverRef_t **current = list;
1237 cm_serverRef_t **nextp = 0;
1238 cm_serverRef_t * next = 0;
1240 lock_ObtainWrite(&cm_serverLock);
1244 nextp = &(*current)->next;
1245 if (--((*current)->refCount) == 0) {
1248 if ((*current)->volID)
1249 cm_RemoveVolumeFromServer((*current)->server, (*current)->volID);
1250 cm_FreeServer((*current)->server);
1254 if (flags & CM_FREESERVERLIST_DELETE) {
1255 (*current)->status = srv_deleted;
1256 if ((*current)->volID)
1257 cm_RemoveVolumeFromServer((*current)->server, (*current)->volID);
1263 lock_ReleaseWrite(&cm_serverLock);