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_ObtainWrite(&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_ReleaseWrite(&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_ObtainWrite(&cm_serverLock);
211 for (tsp = cm_allServersp; tsp; tsp = tsp->allNextp) {
212 cm_GetServerNoLock(tsp);
213 lock_ReleaseWrite(&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_ObtainWrite(&cm_serverLock);
249 cm_PutServerNoLock(tsp);
251 lock_ReleaseWrite(&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;
273 struct rx_connection **rxconns = NULL;
276 afs_int32 *conntimer, *results;
277 Capabilities *caps = NULL;
278 cm_server_t ** serversp, *tsp;
279 afs_uint32 isDown, wasDown;
281 time_t start, end, *deltas;
288 j = max(cm_numFileServers,cm_numVldbServers);
289 conns = (cm_conn_t **)malloc(j * sizeof(cm_conn_t *));
290 rxconns = (struct rx_connection **)malloc(j * sizeof(struct rx_connection *));
291 conntimer = (afs_int32 *)malloc(j * sizeof (afs_int32));
292 deltas = (time_t *)malloc(j * sizeof (time_t));
293 results = (afs_int32 *)malloc(j * sizeof (afs_int32));
294 serversp = (cm_server_t **)malloc(j * sizeof(cm_server_t *));
295 caps = (Capabilities *)malloc(j * sizeof(Capabilities));
297 memset(caps, 0, j * sizeof(Capabilities));
299 if (!(flags & CM_FLAG_CHECKVLDBSERVERS)) {
300 lock_ObtainWrite(&cm_serverLock);
302 for (nconns=0, tsp = cm_allServersp; tsp; tsp = tsp->allNextp) {
303 if (tsp->type != CM_SERVER_FILE ||
304 tsp->cellp == NULL || /* SetPref only */
305 cellp && cellp != tsp->cellp)
308 cm_GetServerNoLock(tsp);
309 lock_ReleaseWrite(&cm_serverLock);
311 lock_ObtainMutex(&tsp->mx);
312 isDown = tsp->flags & CM_SERVERFLAG_DOWN;
314 if ((tsp->flags & CM_SERVERFLAG_PINGING) ||
315 !((isDown && (flags & CM_FLAG_CHECKDOWNSERVERS)) ||
316 (!isDown && (flags & CM_FLAG_CHECKUPSERVERS)))) {
317 lock_ReleaseMutex(&tsp->mx);
318 lock_ObtainWrite(&cm_serverLock);
322 tsp->flags |= CM_SERVERFLAG_PINGING;
323 lock_ReleaseMutex(&tsp->mx);
325 serversp[nconns] = tsp;
326 code = cm_ConnByServer(tsp, cm_rootUserp, &conns[nconns]);
328 lock_ObtainWrite(&cm_serverLock);
329 cm_PutServerNoLock(tsp);
332 lock_ObtainWrite(&cm_serverLock);
333 rxconns[nconns] = cm_GetRxConn(conns[nconns]);
334 if (conntimer[nconns] = (isDown ? 1 : 0))
335 rx_SetConnDeadTime(rxconns[nconns], 10);
339 lock_ReleaseWrite(&cm_serverLock);
341 /* Perform the multi call */
343 multi_Rx(rxconns,nconns)
345 multi_RXAFS_GetCapabilities(&caps[multi_i]);
346 results[multi_i]=multi_error;
350 /* Process results of servers that support RXAFS_GetCapabilities */
351 for (i=0; i<nconns; i++) {
352 /* Leave the servers that did not support GetCapabilities alone */
353 if (results[i] == RXGEN_OPCODE)
357 rx_SetConnDeadTime(rxconns[i], ConnDeadtimeout);
358 rx_PutConnection(rxconns[i]);
359 cm_PutConn(conns[i]);
362 cm_GCConnections(tsp);
364 lock_ObtainMutex(&tsp->mx);
365 wasDown = tsp->flags & CM_SERVERFLAG_DOWN;
367 if (results[i] >= 0) {
368 /* mark server as up */
369 tsp->flags &= ~CM_SERVERFLAG_DOWN;
372 /* we currently handle 32-bits of capabilities */
373 if (caps[i].Capabilities_len > 0) {
374 tsp->capabilities = caps[i].Capabilities_val[0];
375 free(caps[i].Capabilities_val);
376 caps[i].Capabilities_len = 0;
377 caps[i].Capabilities_val = 0;
379 tsp->capabilities = 0;
382 osi_Log3(afsd_logp, "cm_MultiPingServer server %s (%s) is up with caps 0x%x",
383 osi_LogSaveString(afsd_logp, hoststr),
384 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
387 /* Now update the volume status if necessary */
389 cm_server_vols_t * tsrvp;
393 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
394 for (i=0; i<NUM_SERVER_VOLS; i++) {
395 if (tsrvp->ids[i] != 0) {
398 lock_ReleaseMutex(&tsp->mx);
399 code = cm_GetVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
400 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE, &volp);
401 lock_ObtainMutex(&tsp->mx);
403 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
411 /* mark server as down */
412 if (!(tsp->flags & CM_SERVERFLAG_DOWN)) {
413 tsp->flags |= CM_SERVERFLAG_DOWN;
414 tsp->downTime = time(NULL);
416 if (code != VRESTARTING)
417 cm_ForceNewConnections(tsp);
419 osi_Log3(afsd_logp, "cm_MultiPingServer server %s (%s) is down with caps 0x%x",
420 osi_LogSaveString(afsd_logp, hoststr),
421 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
424 /* Now update the volume status if necessary */
426 cm_server_vols_t * tsrvp;
430 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
431 for (i=0; i<NUM_SERVER_VOLS; i++) {
432 if (tsrvp->ids[i] != 0) {
435 lock_ReleaseMutex(&tsp->mx);
436 code = cm_GetVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
437 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE, &volp);
438 lock_ObtainMutex(&tsp->mx);
440 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
449 if (tsp->waitCount == 0)
450 tsp->flags &= ~CM_SERVERFLAG_PINGING;
452 osi_Wakeup((LONG_PTR)tsp);
454 lock_ReleaseMutex(&tsp->mx);
460 * At this point we have handled any responses that did not indicate
461 * that RXAFS_GetCapabilities is not supported.
463 for ( i=0, j=0; i<nconns; i++) {
464 if (results[i] == RXGEN_OPCODE && i != j) {
466 rxconns[j] = rxconns[i];
467 serversp[j] = serversp[i];
473 /* Perform the multi call */
475 multi_Rx(rxconns,nconns)
478 multi_RXAFS_GetTime(&secs, &usecs);
480 results[multi_i]=multi_error;
481 if ((start == end) && !multi_error)
482 deltas[multi_i] = end - secs;
486 /* Process Results of servers that only support RXAFS_GetTime */
487 for (i=0; i<nconns; i++) {
488 /* Leave the servers that did not support GetCapabilities alone */
490 rx_SetConnDeadTime(rxconns[i], ConnDeadtimeout);
491 rx_PutConnection(rxconns[i]);
492 cm_PutConn(conns[i]);
495 cm_GCConnections(tsp);
497 lock_ObtainMutex(&tsp->mx);
498 wasDown = tsp->flags & CM_SERVERFLAG_DOWN;
500 if (results[i] >= 0) {
501 /* mark server as up */
502 tsp->flags &= ~CM_SERVERFLAG_DOWN;
504 tsp->capabilities = 0;
506 osi_Log3(afsd_logp, "cm_MultiPingServer server %s (%s) is up with caps 0x%x",
507 osi_LogSaveString(afsd_logp, hoststr),
508 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
511 /* Now update the volume status if necessary */
513 cm_server_vols_t * tsrvp;
517 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
518 for (i=0; i<NUM_SERVER_VOLS; i++) {
519 if (tsrvp->ids[i] != 0) {
522 lock_ReleaseMutex(&tsp->mx);
523 code = cm_GetVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
524 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE, &volp);
525 lock_ObtainMutex(&tsp->mx);
527 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
535 /* mark server as down */
536 if (!(tsp->flags & CM_SERVERFLAG_DOWN)) {
537 tsp->flags |= CM_SERVERFLAG_DOWN;
538 tsp->downTime = time(NULL);
540 if (code != VRESTARTING)
541 cm_ForceNewConnections(tsp);
543 osi_Log3(afsd_logp, "cm_MultiPingServer server %s (%s) is down with caps 0x%x",
544 osi_LogSaveString(afsd_logp, hoststr),
545 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
548 /* Now update the volume status if necessary */
550 cm_server_vols_t * tsrvp;
554 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
555 for (i=0; i<NUM_SERVER_VOLS; i++) {
556 if (tsrvp->ids[i] != 0) {
559 lock_ReleaseMutex(&tsp->mx);
560 code = cm_GetVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
561 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE, &volp);
562 lock_ObtainMutex(&tsp->mx);
564 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
573 if (tsp->waitCount == 0)
574 tsp->flags &= ~CM_SERVERFLAG_PINGING;
576 osi_Wakeup((LONG_PTR)tsp);
578 lock_ReleaseMutex(&tsp->mx);
584 if (!(flags & CM_FLAG_CHECKFILESERVERS)) {
585 lock_ObtainWrite(&cm_serverLock);
587 for (nconns=0, tsp = cm_allServersp; tsp; tsp = tsp->allNextp) {
588 if (tsp->type != CM_SERVER_VLDB ||
589 tsp->cellp == NULL || /* SetPref only */
590 cellp && cellp != tsp->cellp)
593 cm_GetServerNoLock(tsp);
594 lock_ReleaseWrite(&cm_serverLock);
596 lock_ObtainMutex(&tsp->mx);
597 isDown = tsp->flags & CM_SERVERFLAG_DOWN;
599 if ((tsp->flags & CM_SERVERFLAG_PINGING) ||
600 !((isDown && (flags & CM_FLAG_CHECKDOWNSERVERS)) ||
601 (!isDown && (flags & CM_FLAG_CHECKUPSERVERS)))) {
602 lock_ReleaseMutex(&tsp->mx);
603 lock_ObtainWrite(&cm_serverLock);
607 tsp->flags |= CM_SERVERFLAG_PINGING;
608 lock_ReleaseMutex(&tsp->mx);
610 serversp[nconns] = tsp;
611 code = cm_ConnByServer(tsp, cm_rootUserp, &conns[nconns]);
613 lock_ObtainWrite(&cm_serverLock);
614 cm_PutServerNoLock(tsp);
617 lock_ObtainWrite(&cm_serverLock);
618 rxconns[nconns] = cm_GetRxConn(conns[nconns]);
619 if (conntimer[nconns] = (isDown ? 1 : 0))
620 rx_SetConnDeadTime(rxconns[nconns], 10);
624 lock_ReleaseWrite(&cm_serverLock);
626 /* Perform the multi call */
628 multi_Rx(rxconns,nconns)
630 multi_VL_ProbeServer();
631 results[multi_i]=multi_error;
635 /* Process results of servers that support RXAFS_GetCapabilities */
636 for (i=0; i<nconns; i++) {
637 /* Leave the servers that did not support GetCapabilities alone */
638 if (results[i] == RXGEN_OPCODE)
642 rx_SetConnDeadTime(rxconns[i], ConnDeadtimeout);
643 rx_PutConnection(rxconns[i]);
644 cm_PutConn(conns[i]);
647 cm_GCConnections(tsp);
649 lock_ObtainMutex(&tsp->mx);
650 wasDown = tsp->flags & CM_SERVERFLAG_DOWN;
652 if (results[i] >= 0) {
653 /* mark server as up */
654 tsp->flags &= ~CM_SERVERFLAG_DOWN;
656 tsp->capabilities = 0;
658 osi_Log3(afsd_logp, "cm_MultiPingServer server %s (%s) is up with caps 0x%x",
659 osi_LogSaveString(afsd_logp, hoststr),
660 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
663 /* Now update the volume status if necessary */
665 cm_server_vols_t * tsrvp;
669 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
670 for (i=0; i<NUM_SERVER_VOLS; i++) {
671 if (tsrvp->ids[i] != 0) {
674 lock_ReleaseMutex(&tsp->mx);
675 code = cm_GetVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
676 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE, &volp);
677 lock_ObtainMutex(&tsp->mx);
679 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
687 /* mark server as down */
688 if (!(tsp->flags & CM_SERVERFLAG_DOWN)) {
689 tsp->flags |= CM_SERVERFLAG_DOWN;
690 tsp->downTime = time(NULL);
692 if (code != VRESTARTING)
693 cm_ForceNewConnections(tsp);
695 osi_Log3(afsd_logp, "cm_MultiPingServer server %s (%s) is down with caps 0x%x",
696 osi_LogSaveString(afsd_logp, hoststr),
697 tsp->type == CM_SERVER_VLDB ? "vldb" : "file",
700 /* Now update the volume status if necessary */
702 cm_server_vols_t * tsrvp;
706 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
707 for (i=0; i<NUM_SERVER_VOLS; i++) {
708 if (tsrvp->ids[i] != 0) {
711 lock_ReleaseMutex(&tsp->mx);
712 code = cm_GetVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
713 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE, &volp);
714 lock_ObtainMutex(&tsp->mx);
716 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
725 if (tsp->waitCount == 0)
726 tsp->flags &= ~CM_SERVERFLAG_PINGING;
728 osi_Wakeup((LONG_PTR)tsp);
730 lock_ReleaseMutex(&tsp->mx);
743 #endif /* MULTI_CHECKSERVERS */
745 void cm_InitServer(void)
747 static osi_once_t once;
749 if (osi_Once(&once)) {
750 lock_InitializeRWLock(&cm_serverLock, "cm_serverLock");
755 void cm_GetServer(cm_server_t *serverp)
757 lock_ObtainWrite(&cm_serverLock);
759 lock_ReleaseWrite(&cm_serverLock);
762 void cm_GetServerNoLock(cm_server_t *serverp)
767 void cm_PutServer(cm_server_t *serverp)
769 lock_ObtainWrite(&cm_serverLock);
770 osi_assertx(serverp->refCount-- > 0, "cm_server_t refCount 0");
771 lock_ReleaseWrite(&cm_serverLock);
774 void cm_PutServerNoLock(cm_server_t *serverp)
776 osi_assertx(serverp->refCount-- > 0, "cm_server_t refCount 0");
779 void cm_SetServerNo64Bit(cm_server_t * serverp, int no64bit)
781 lock_ObtainMutex(&serverp->mx);
783 serverp->flags |= CM_SERVERFLAG_NO64BIT;
785 serverp->flags &= ~CM_SERVERFLAG_NO64BIT;
786 lock_ReleaseMutex(&serverp->mx);
789 void cm_SetServerNoInlineBulk(cm_server_t * serverp, int no)
791 lock_ObtainMutex(&serverp->mx);
793 serverp->flags |= CM_SERVERFLAG_NOINLINEBULK;
795 serverp->flags &= ~CM_SERVERFLAG_NOINLINEBULK;
796 lock_ReleaseMutex(&serverp->mx);
799 void cm_SetServerPrefs(cm_server_t * serverp)
801 unsigned long serverAddr; /* in host byte order */
802 unsigned long myAddr, myNet, mySubnet;/* in host byte order */
803 unsigned long netMask;
806 int cm_noIPAddr; /* number of client network interfaces */
807 int cm_IPAddr[CM_MAXINTERFACE_ADDR]; /* client's IP address in host order */
808 int cm_SubnetMask[CM_MAXINTERFACE_ADDR];/* client's subnet mask in host order*/
809 int cm_NetMtu[CM_MAXINTERFACE_ADDR]; /* client's MTU sizes */
810 int cm_NetFlags[CM_MAXINTERFACE_ADDR]; /* network flags */
813 /* get network related info */
814 cm_noIPAddr = CM_MAXINTERFACE_ADDR;
815 code = syscfg_GetIFInfo(&cm_noIPAddr,
816 cm_IPAddr, cm_SubnetMask,
817 cm_NetMtu, cm_NetFlags);
819 serverAddr = ntohl(serverp->addr.sin_addr.s_addr);
820 serverp->ipRank = CM_IPRANK_LOW; /* default setings */
822 for ( i=0; i < cm_noIPAddr; i++)
824 /* loop through all the client's IP address and compare
825 ** each of them against the server's IP address */
827 myAddr = cm_IPAddr[i];
828 if ( IN_CLASSA(myAddr) )
829 netMask = IN_CLASSA_NET;
830 else if ( IN_CLASSB(myAddr) )
831 netMask = IN_CLASSB_NET;
832 else if ( IN_CLASSC(myAddr) )
833 netMask = IN_CLASSC_NET;
837 myNet = myAddr & netMask;
838 mySubnet = myAddr & cm_SubnetMask[i];
840 if ( (serverAddr & netMask) == myNet )
842 if ( (serverAddr & cm_SubnetMask[i]) == mySubnet)
844 if ( serverAddr == myAddr )
845 serverp->ipRank = min(serverp->ipRank,
846 CM_IPRANK_TOP);/* same machine */
847 else serverp->ipRank = min(serverp->ipRank,
848 CM_IPRANK_HI); /* same subnet */
850 else serverp->ipRank = min(serverp->ipRank,CM_IPRANK_MED);
853 /* random between 0..15*/
854 serverp->ipRank += min(serverp->ipRank, rand() % 0x000f);
855 } /* and of for loop */
858 cm_server_t *cm_NewServer(struct sockaddr_in *socketp, int type, cm_cell_t *cellp, afs_uint32 flags) {
861 osi_assertx(socketp->sin_family == AF_INET, "unexpected socket family");
863 tsp = malloc(sizeof(*tsp));
865 memset(tsp, 0, sizeof(*tsp));
869 lock_InitializeMutex(&tsp->mx, "cm_server_t mutex");
870 tsp->addr = *socketp;
872 cm_SetServerPrefs(tsp);
874 lock_ObtainWrite(&cm_serverLock); /* get server lock */
875 tsp->allNextp = cm_allServersp;
876 cm_allServersp = tsp;
887 lock_ReleaseWrite(&cm_serverLock); /* release server lock */
889 if ( !(flags & CM_FLAG_NOPROBE) ) {
890 tsp->flags = CM_SERVERFLAG_DOWN; /* assume down; ping will mark up if available */
891 cm_PingServer(tsp); /* Obtain Capabilities and check up/down state */
898 cm_FindServerByIP(afs_uint32 ipaddr, int type)
902 lock_ObtainRead(&cm_serverLock);
903 for (tsp = cm_allServersp; tsp; tsp = tsp->allNextp) {
904 if (tsp->type == type &&
905 tsp->addr.sin_addr.S_un.S_addr == ipaddr)
908 lock_ReleaseRead(&cm_serverLock);
913 /* find a server based on its properties */
914 cm_server_t *cm_FindServer(struct sockaddr_in *addrp, int type)
918 osi_assertx(addrp->sin_family == AF_INET, "unexpected socket value");
920 lock_ObtainWrite(&cm_serverLock);
921 for (tsp = cm_allServersp; tsp; tsp=tsp->allNextp) {
922 if (tsp->type == type &&
923 tsp->addr.sin_addr.s_addr == addrp->sin_addr.s_addr)
927 /* bump ref count if we found the server */
929 cm_GetServerNoLock(tsp);
931 /* drop big table lock */
932 lock_ReleaseWrite(&cm_serverLock);
934 /* return what we found */
938 cm_server_vols_t *cm_NewServerVols(void) {
939 cm_server_vols_t *tsvp;
941 tsvp = malloc(sizeof(*tsvp));
943 memset(tsvp, 0, sizeof(*tsvp));
948 cm_serverRef_t *cm_NewServerRef(cm_server_t *serverp, afs_uint32 volID)
950 cm_serverRef_t *tsrp;
951 cm_server_vols_t **tsrvpp = NULL;
952 afs_uint32 *slotp = NULL;
955 cm_GetServer(serverp);
956 tsrp = malloc(sizeof(*tsrp));
957 tsrp->server = serverp;
958 tsrp->status = srv_not_busy;
963 /* if we have a non-zero volID, we need to add it to the list
964 * of volumes maintained by the server. There are two phases:
965 * (1) see if the volID is already in the list and (2) insert
966 * it into the first empty slot if it is not.
969 lock_ObtainMutex(&serverp->mx);
971 tsrvpp = &serverp->vols;
975 for (i=0; i<NUM_SERVER_VOLS; i++) {
976 if ((*tsrvpp)->ids[i] == volID) {
979 } else if (!slotp && (*tsrvpp)->ids[i] == 0) {
980 slotp = &(*tsrvpp)->ids[i];
987 tsrvpp = &(*tsrvpp)->nextp;
994 /* if we didn't find an empty slot in a current
995 * page we must need a new page */
996 *tsrvpp = cm_NewServerVols();
998 (*tsrvpp)->ids[0] = volID;
1002 lock_ReleaseMutex(&serverp->mx);
1008 LONG_PTR cm_ChecksumServerList(cm_serverRef_t *serversp)
1012 cm_serverRef_t *tsrp;
1014 lock_ObtainWrite(&cm_serverLock);
1015 for (tsrp = serversp; tsrp; tsrp=tsrp->next) {
1020 sum ^= (LONG_PTR) tsrp->server;
1023 lock_ReleaseWrite(&cm_serverLock);
1028 ** Insert a server into the server list keeping the list sorted in
1029 ** asending order of ipRank.
1031 ** The refCount of the cm_serverRef_t is increased
1033 void cm_InsertServerList(cm_serverRef_t** list, cm_serverRef_t* element)
1035 cm_serverRef_t *current=*list;
1036 unsigned short ipRank = element->server->ipRank;
1038 lock_ObtainWrite(&cm_serverLock);
1039 element->refCount++; /* increase refCount */
1041 /* insertion into empty list or at the beginning of the list */
1042 if ( !current || (current->server->ipRank > ipRank) )
1044 element->next = *list;
1046 lock_ReleaseWrite(&cm_serverLock);
1050 while ( current->next ) /* find appropriate place to insert */
1052 if ( current->next->server->ipRank > ipRank )
1054 else current = current->next;
1056 element->next = current->next;
1057 current->next = element;
1058 lock_ReleaseWrite(&cm_serverLock);
1061 ** Re-sort the server list with the modified rank
1062 ** returns 0 if element was changed successfully.
1063 ** returns 1 if list remained unchanged.
1065 long cm_ChangeRankServer(cm_serverRef_t** list, cm_server_t* server)
1067 cm_serverRef_t **current=list;
1068 cm_serverRef_t *element=0;
1070 /* if there is max of one element in the list, nothing to sort */
1071 if ( (!*current) || !((*current)->next) )
1072 return 1; /* list unchanged: return success */
1074 lock_ObtainWrite(&cm_serverLock);
1075 /* if the server is on the list, delete it from list */
1078 if ( (*current)->server == server)
1080 element = (*current);
1081 *current = (*current)->next; /* delete it */
1084 current = & ( (*current)->next);
1086 lock_ReleaseWrite(&cm_serverLock);
1088 /* if this volume is not replicated on this server */
1090 return 1; /* server is not on list */
1092 /* re-insert deleted element into the list with modified rank*/
1093 cm_InsertServerList(list, element);
1095 /* reduce refCount which was increased by cm_InsertServerList */
1096 lock_ObtainWrite(&cm_serverLock);
1097 element->refCount--;
1098 lock_ReleaseWrite(&cm_serverLock);
1102 ** If there are more than one server on the list and the first n servers on
1103 ** the list have the same rank( n>1), then randomise among the first n servers.
1105 void cm_RandomizeServer(cm_serverRef_t** list)
1108 cm_serverRef_t* tsrp = *list, *lastTsrp;
1109 unsigned short lowestRank;
1111 /* an empty list or a list with only one element */
1112 if ( !tsrp || ! tsrp->next )
1115 lock_ObtainWrite(&cm_serverLock);
1117 /* count the number of servers with the lowest rank */
1118 lowestRank = tsrp->server->ipRank;
1119 for ( count=1, tsrp=tsrp->next; tsrp; tsrp=tsrp->next)
1121 if ( tsrp->server->ipRank != lowestRank)
1127 /* if there is only one server with the lowest rank, we are done */
1129 lock_ReleaseWrite(&cm_serverLock);
1133 picked = rand() % count;
1135 lock_ReleaseWrite(&cm_serverLock);
1140 while (--picked >= 0)
1145 lastTsrp->next = tsrp->next; /* delete random element from list*/
1146 tsrp->next = *list; /* insert element at the beginning of list */
1148 lock_ReleaseWrite(&cm_serverLock);
1151 /* call cm_FreeServer while holding a write lock on cm_serverLock */
1152 void cm_FreeServer(cm_server_t* serverp)
1154 cm_server_vols_t * tsrvp, *nextp;
1156 cm_PutServerNoLock(serverp);
1157 if (serverp->refCount == 0)
1159 /* we need to check to ensure that all of the connections
1160 * for this server have a 0 refCount; otherwise, they will
1161 * not be garbage collected
1163 cm_GCConnections(serverp); /* connsp */
1165 if (!(serverp->flags & CM_SERVERFLAG_PREF_SET)) {
1166 switch (serverp->type) {
1167 case CM_SERVER_VLDB:
1168 cm_numVldbServers--;
1170 case CM_SERVER_FILE:
1171 cm_numFileServers--;
1175 lock_FinalizeMutex(&serverp->mx);
1176 if ( cm_allServersp == serverp )
1177 cm_allServersp = serverp->allNextp;
1181 for(tsp = cm_allServersp; tsp->allNextp; tsp=tsp->allNextp) {
1182 if ( tsp->allNextp == serverp ) {
1183 tsp->allNextp = serverp->allNextp;
1189 /* free the volid list */
1190 for ( tsrvp = serverp->vols; tsrvp; tsrvp = nextp) {
1191 nextp = tsrvp->nextp;
1200 void cm_RemoveVolumeFromServer(cm_server_t * serverp, afs_uint32 volID)
1202 cm_server_vols_t * tsrvp;
1208 for (tsrvp = serverp->vols; tsrvp; tsrvp = tsrvp->nextp) {
1209 for (i=0; i<NUM_SERVER_VOLS; i++) {
1210 if (tsrvp->ids[i] == volID) {
1218 void cm_FreeServerList(cm_serverRef_t** list, afs_uint32 flags)
1220 cm_serverRef_t **current = list;
1221 cm_serverRef_t **nextp = 0;
1222 cm_serverRef_t * next = 0;
1224 lock_ObtainWrite(&cm_serverLock);
1228 nextp = &(*current)->next;
1229 if (--((*current)->refCount) == 0) {
1232 if ((*current)->volID)
1233 cm_RemoveVolumeFromServer((*current)->server, (*current)->volID);
1234 cm_FreeServer((*current)->server);
1238 if (flags & CM_FREESERVERLIST_DELETE) {
1239 (*current)->status = srv_deleted;
1240 if ((*current)->volID)
1241 cm_RemoveVolumeFromServer((*current)->server, (*current)->volID);
1247 lock_ReleaseWrite(&cm_serverLock);