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>
17 #ifdef AFS_PTHREAD_ENV
18 # include <opr/lock.h>
20 # include <opr/lockstub.h>
24 #include <afs/afsutil.h>
25 #include <afs/cellconfig.h>
28 #define UBIK_INTERNALS
33 * This module is responsible for determining when the system has
34 * recovered to the point that it can handle new transactions. It
35 * replays logs, polls to determine the current dbase after a crash,
36 * and distributes the new database to the others.
38 * The sync site associates a version number with each database. It
39 * broadcasts the version associated with its current dbase in every
40 * one of its beacon messages. When the sync site send a dbase to a
41 * server, it also sends the db's version. A non-sync site server can
42 * tell if it has the right dbase version by simply comparing the
43 * version from the beacon message \p uvote_dbVersion with the version
44 * associated with the database \p ubik_dbase->version. The sync site
45 * itself simply has one counter to keep track of all of this (again
46 * \p ubik_dbase->version).
48 * sync site: routine called when the sync site loses its quorum; this
49 * procedure is called "up" from the beacon package. It resyncs the
50 * dbase and nudges the recovery daemon to try to propagate out the
51 * changes. It also resets the recovery daemon's state, since
52 * recovery must potentially find a new dbase to propagate out. This
53 * routine should not do anything with variables used by non-sync site
58 * if this flag is set, then ubik will use only the primary address
59 * (the address specified in the CellServDB) to contact other
60 * ubik servers. Ubik recovery will not try opening connections
61 * to the alternate interface addresses.
63 int ubikPrimaryAddrOnly
;
66 urecovery_ResetState(void)
69 #if !defined(AFS_PTHREAD_ENV)
70 /* No corresponding LWP_WaitProcess found anywhere for this -- klm */
71 LWP_NoYieldSignal(&urecovery_state
);
79 * routine called when a non-sync site server goes down; restarts recovery
80 * process to send missing server the new db when it comes back up for
81 * non-sync site servers.
83 * \note This routine should not do anything with variables used by non-sync site servers.
86 urecovery_LostServer(struct ubik_server
*ts
)
88 ubeacon_ReinitServer(ts
);
89 #if !defined(AFS_PTHREAD_ENV)
90 /* No corresponding LWP_WaitProcess found anywhere for this -- klm */
91 LWP_NoYieldSignal(&urecovery_state
);
97 * return true iff we have a current database (called by both sync
98 * sites and non-sync sites) How do we determine this? If we're the
99 * sync site, we wait until recovery has finished fetching and
100 * re-labelling its dbase (it may still be trying to propagate it out
101 * to everyone else; that's THEIR problem). If we're not the sync
102 * site, then we must have a dbase labelled with the right version,
103 * and we must have a currently-good sync site.
106 urecovery_AllBetter(struct ubik_dbase
*adbase
, int areadAny
)
110 ubik_dprint_25("allbetter checking\n");
115 if (ubik_dbase
->version
.epoch
> 1)
116 rcode
= 1; /* Happy with any good version of database */
119 /* Check if we're sync site and we've got the right data */
120 else if (ubeacon_AmSyncSite() && (urecovery_state
& UBIK_RECHAVEDB
)) {
124 /* next, check if we're aux site, and we've ever been sent the
125 * right data (note that if a dbase update fails, we won't think
126 * that the sync site is still the sync site, 'cause it won't talk
127 * to us until a timeout period has gone by. When we recover, we
128 * leave this clear until we get a new dbase */
129 else if (uvote_HaveSyncAndVersion(ubik_dbase
->version
)) {
133 ubik_dprint_25("allbetter: returning %d\n", rcode
);
138 * \brief abort all transactions on this database
141 urecovery_AbortAll(struct ubik_dbase
*adbase
)
143 struct ubik_trans
*tt
;
144 for (tt
= adbase
->activeTrans
; tt
; tt
= tt
->next
) {
151 * \brief this routine aborts the current remote transaction, if any, if the tid is wrong
154 urecovery_CheckTid(struct ubik_tid
*atid
, int abortalways
)
156 if (ubik_currentTrans
) {
157 /* there is remote write trans, see if we match, see if this
158 * is a new transaction */
159 if (atid
->epoch
!= ubik_currentTrans
->tid
.epoch
160 || atid
->counter
> ubik_currentTrans
->tid
.counter
|| abortalways
) {
161 /* don't match, abort it */
162 /* If the thread is not waiting for lock - ok to end it */
163 if (ubik_currentTrans
->locktype
!= LOCKWAIT
) {
164 udisk_end(ubik_currentTrans
);
166 ubik_currentTrans
= (struct ubik_trans
*)0;
175 * log format is defined here, and implicitly in disk.c
177 * 4 byte opcode, followed by parameters, each 4 bytes long. All integers
178 * are in logged in network standard byte order, in case we want to move logs
179 * from machine-to-machine someday.
181 * Begin transaction: opcode \n
182 * Commit transaction: opcode, version (8 bytes) \n
183 * Truncate file: opcode, file number, length \n
184 * Abort transaction: opcode \n
185 * Write data: opcode, file, position, length, <length> data bytes \n
187 * A very simple routine, it just replays the log. Note that this is a new-value only log, which
188 * implies that no uncommitted data is written to the dbase: one writes data to the log, including
189 * the commit record, then we allow data to be written through to the dbase. In our particular
190 * implementation, once a transaction is done, we write out the pages to the database, so that
191 * our buffer package doesn't have to know about stable and uncommitted data in the memory buffers:
192 * any changed data while there is an uncommitted write transaction can be zapped during an
193 * abort and the remaining dbase on the disk is exactly the right dbase, without having to read
197 ReplayLog(struct ubik_dbase
*adbase
)
200 afs_int32 code
, tpos
;
202 afs_int32 len
, thisSize
, tfile
, filePos
;
204 afs_int32 syncFile
= -1;
205 afs_int32 data
[1024];
207 /* read the lock twice, once to see whether we have a transaction to deal
208 * with that committed, (theoretically, we should support more than one
209 * trans in the log at once, but not yet), and once replaying the
213 /* for now, assume that all ops in log pertain to one transaction; see if there's a commit */
216 (*adbase
->read
) (adbase
, LOGFILE
, (char *)&opcode
, tpos
,
218 if (code
!= sizeof(afs_int32
))
220 opcode
= ntohl(opcode
);
221 if (opcode
== LOGNEW
) {
222 /* handle begin trans */
223 tpos
+= sizeof(afs_int32
);
224 } else if (opcode
== LOGABORT
)
226 else if (opcode
== LOGEND
) {
229 } else if (opcode
== LOGTRUNCATE
) {
232 (*adbase
->read
) (adbase
, LOGFILE
, (char *)buffer
, tpos
,
233 2 * sizeof(afs_int32
));
234 if (code
!= 2 * sizeof(afs_int32
))
235 break; /* premature eof or io error */
236 tpos
+= 2 * sizeof(afs_int32
);
237 } else if (opcode
== LOGDATA
) {
240 (*adbase
->read
) (adbase
, LOGFILE
, (char *)buffer
, tpos
,
241 3 * sizeof(afs_int32
));
242 if (code
!= 3 * sizeof(afs_int32
))
244 /* otherwise, skip over the data bytes, too */
245 tpos
+= ntohl(buffer
[2]) + 3 * sizeof(afs_int32
);
247 ubik_print("corrupt log opcode (%d) at position %d\n", opcode
,
249 break; /* corrupt log! */
253 /* actually do the replay; log should go all the way through the commit record, since
254 * we just read it above. */
260 (*adbase
->read
) (adbase
, LOGFILE
, (char *)&opcode
, tpos
,
262 if (code
!= sizeof(afs_int32
))
264 opcode
= ntohl(opcode
);
265 if (opcode
== LOGNEW
) {
266 /* handle begin trans */
267 tpos
+= sizeof(afs_int32
);
268 } else if (opcode
== LOGABORT
)
269 panic("log abort\n");
270 else if (opcode
== LOGEND
) {
271 struct ubik_version version
;
274 (*adbase
->read
) (adbase
, LOGFILE
, (char *)buffer
, tpos
,
275 2 * sizeof(afs_int32
));
276 if (code
!= 2 * sizeof(afs_int32
))
278 version
.epoch
= ntohl(buffer
[0]);
279 version
.counter
= ntohl(buffer
[1]);
280 code
= (*adbase
->setlabel
) (adbase
, 0, &version
);
283 ubik_print("Successfully replayed log for interrupted "
284 "transaction; db version is now %ld.%ld\n",
285 (long) version
.epoch
, (long) version
.counter
);
287 break; /* all done now */
288 } else if (opcode
== LOGTRUNCATE
) {
291 (*adbase
->read
) (adbase
, LOGFILE
, (char *)buffer
, tpos
,
292 2 * sizeof(afs_int32
));
293 if (code
!= 2 * sizeof(afs_int32
))
294 break; /* premature eof or io error */
295 tpos
+= 2 * sizeof(afs_int32
);
297 (*adbase
->truncate
) (adbase
, ntohl(buffer
[0]),
301 } else if (opcode
== LOGDATA
) {
304 (*adbase
->read
) (adbase
, LOGFILE
, (char *)buffer
, tpos
,
305 3 * sizeof(afs_int32
));
306 if (code
!= 3 * sizeof(afs_int32
))
308 tpos
+= 3 * sizeof(afs_int32
);
309 /* otherwise, skip over the data bytes, too */
310 len
= ntohl(buffer
[2]); /* total number of bytes to copy */
311 filePos
= ntohl(buffer
[1]);
312 tfile
= ntohl(buffer
[0]);
313 /* try to minimize file syncs */
314 if (syncFile
!= tfile
) {
316 code
= (*adbase
->sync
) (adbase
, syncFile
);
324 thisSize
= (len
> sizeof(data
) ? sizeof(data
) : len
);
325 /* copy sizeof(data) buffer bytes at a time */
327 (*adbase
->read
) (adbase
, LOGFILE
, (char *)data
, tpos
,
329 if (code
!= thisSize
)
332 (*adbase
->write
) (adbase
, tfile
, (char *)data
, filePos
,
334 if (code
!= thisSize
)
341 ubik_print("corrupt log opcode (%d) at position %d\n",
343 break; /* corrupt log! */
348 code
= (*adbase
->sync
) (adbase
, syncFile
);
352 ubik_print("Log read error on pass 2\n");
357 /* now truncate the log, we're done with it */
358 code
= (*adbase
->truncate
) (adbase
, LOGFILE
, 0);
363 * Called at initialization to figure out version of the dbase we really have.
365 * This routine is called after replaying the log; it reads the restored labels.
368 InitializeDB(struct ubik_dbase
*adbase
)
372 code
= (*adbase
->getlabel
) (adbase
, 0, &adbase
->version
);
374 /* try setting the label to a new value */
376 adbase
->version
.epoch
= 1; /* value for newly-initialized db */
377 adbase
->version
.counter
= 1;
378 code
= (*adbase
->setlabel
) (adbase
, 0, &adbase
->version
);
380 /* failed, try to set it back */
381 adbase
->version
.epoch
= 0;
382 adbase
->version
.counter
= 0;
383 (*adbase
->setlabel
) (adbase
, 0, &adbase
->version
);
385 #ifdef AFS_PTHREAD_ENV
386 opr_cv_broadcast(&adbase
->version_cond
);
388 LWP_NoYieldSignal(&adbase
->version
);
396 * \brief initialize the local ubik_dbase
398 * We replay the logs and then read the resulting file to figure out what version we've really got.
401 urecovery_Initialize(struct ubik_dbase
*adbase
)
406 code
= ReplayLog(adbase
);
409 code
= InitializeDB(adbase
);
416 * \brief Main interaction loop for the recovery manager
418 * The recovery light-weight process only runs when you're the
419 * synchronization site. It performs the following tasks, if and only
420 * if the prerequisite tasks have been performed successfully (it
421 * keeps track of which ones have been performed in its bit map,
422 * \p urecovery_state).
424 * First, it is responsible for probing that all servers are up. This
425 * is the only operation that must be performed even if this is not
426 * yet the sync site, since otherwise this site may not notice that
427 * enough other machines are running to even elect this guy to be the
430 * After that, the recovery process does nothing until the beacon and
431 * voting modules manage to get this site elected sync site.
433 * After becoming sync site, recovery first attempts to find the best
434 * database available in the network (it must do this in order to
435 * ensure finding the latest committed data). After finding the right
436 * database, it must fetch this dbase to the sync site.
438 * After fetching the dbase, it relabels it with a new version number,
439 * to ensure that everyone recognizes this dbase as the most recent
442 * One the dbase has been relabelled, this machine can start handling
443 * requests. However, the recovery module still has one more task:
444 * propagating the dbase out to everyone who is up in the network.
447 urecovery_Interact(void *dummy
)
450 struct ubik_server
*bestServer
= NULL
;
451 struct ubik_server
*ts
;
452 int dbok
, doingRPC
, now
;
453 afs_int32 lastProbeTime
;
454 /* if we're the sync site, the best db version we've found yet */
455 static struct ubik_version bestDBVersion
;
456 struct ubik_version tversion
;
458 int length
, tlen
, offset
, file
, nbytes
;
459 struct rx_call
*rxcall
;
461 struct ubik_stat ubikstat
;
462 struct in_addr inAddr
;
468 afs_pthread_setname_self("recovery");
470 /* otherwise, begin interaction */
474 /* Run through this loop every 4 seconds */
477 #ifdef AFS_PTHREAD_ENV
478 select(0, 0, 0, 0, &tv
);
480 IOMGR_Select(0, 0, 0, 0, &tv
);
483 ubik_dprint("recovery running in state %x\n", urecovery_state
);
485 /* Every 30 seconds, check all the down servers and mark them
486 * as up if they respond. When a server comes up or found to
487 * not be current, then re-find the the best database and
490 if ((now
= FT_ApproxTime()) > 30 + lastProbeTime
) {
492 for (ts
= ubik_servers
, doingRPC
= 0; ts
; ts
= ts
->next
) {
503 urecovery_state
&= ~UBIK_RECFOUNDDB
;
510 urecovery_state
&= ~UBIK_RECFOUNDDB
;
516 now
= FT_ApproxTime();
520 /* Mark whether we are the sync site */
522 if (!ubeacon_AmSyncSite()) {
523 urecovery_state
&= ~UBIK_RECSYNCSITE
;
525 continue; /* nothing to do */
527 urecovery_state
|= UBIK_RECSYNCSITE
;
529 /* If a server has just come up or if we have not found the
530 * most current database, then go find the most current db.
532 if (!(urecovery_state
& UBIK_RECFOUNDDB
)) {
535 bestServer
= (struct ubik_server
*)0;
536 bestDBVersion
.epoch
= 0;
537 bestDBVersion
.counter
= 0;
538 for (ts
= ubik_servers
; ts
; ts
= ts
->next
) {
542 continue; /* don't bother with these guys */
548 code
= DISK_GetVersion(ts
->disk_rxcid
, &ts
->version
);
552 /* perhaps this is the best version */
553 if (vcmp(ts
->version
, bestDBVersion
) > 0) {
554 /* new best version */
555 bestDBVersion
= ts
->version
;
563 if (okcalls
+ 1 >= ubik_quorum
) {
564 /* If we've asked a majority of sites about their db version,
565 * then we can say with confidence that we've found the best db
566 * version. If we haven't contacted most sites (because
567 * GetVersion failed or because we already know the server is
568 * down), then we don't really know if we know about the best
569 * db version. So we can only proceed in here if 'okcalls'
570 * indicates we managed to contact a majority of sites. */
572 /* take into consideration our version. Remember if we,
573 * the sync site, have the best version. Also note that
574 * we may need to send the best version out.
576 if (vcmp(ubik_dbase
->version
, bestDBVersion
) >= 0) {
577 bestDBVersion
= ubik_dbase
->version
;
578 bestServer
= (struct ubik_server
*)0;
579 urecovery_state
|= UBIK_RECHAVEDB
;
581 /* Clear the flag only when we know we have to retrieve
582 * the db. Because urecovery_AllBetter() looks at it.
584 urecovery_state
&= ~UBIK_RECHAVEDB
;
586 urecovery_state
|= UBIK_RECFOUNDDB
;
587 urecovery_state
&= ~UBIK_RECSENTDB
;
590 if (!(urecovery_state
& UBIK_RECFOUNDDB
)) {
592 continue; /* not ready */
595 /* If we, the sync site, do not have the best db version, then
596 * go and get it from the server that does.
598 if ((urecovery_state
& UBIK_RECHAVEDB
) || !bestServer
) {
599 urecovery_state
|= UBIK_RECHAVEDB
;
601 /* we don't have the best version; we should fetch it. */
602 urecovery_AbortAll(ubik_dbase
);
604 /* Rx code to do the Bulk fetch */
608 rxcall
= rx_NewCall(bestServer
->disk_rxcid
);
610 ubik_print("Ubik: Synchronize database with server %s\n",
611 afs_inet_ntoa_r(bestServer
->addr
[0], hoststr
));
614 code
= StartDISK_GetFile(rxcall
, file
);
616 ubik_dprint("StartDiskGetFile failed=%d\n", code
);
619 nbytes
= rx_Read(rxcall
, (char *)&length
, sizeof(afs_int32
));
620 length
= ntohl(length
);
621 if (nbytes
!= sizeof(afs_int32
)) {
622 ubik_dprint("Rx-read length error=%d\n", code
= BULK_ERROR
);
627 /* give invalid label during file transit */
630 code
= (*ubik_dbase
->setlabel
) (ubik_dbase
, file
, &tversion
);
633 ubik_dprint("setlabel io error=%d\n", code
);
636 snprintf(pbuffer
, sizeof(pbuffer
), "%s.DB%s%d.TMP",
637 ubik_dbase
->pathName
, (file
<0)?"SYS":"",
638 (file
<0)?-file
:file
);
639 fd
= open(pbuffer
, O_CREAT
| O_RDWR
| O_TRUNC
, 0600);
644 code
= lseek(fd
, HDRSIZE
, 0);
645 if (code
!= HDRSIZE
) {
652 tlen
= (length
> sizeof(tbuffer
) ? sizeof(tbuffer
) : length
);
653 #ifndef AFS_PTHREAD_ENV
657 nbytes
= rx_Read(rxcall
, tbuffer
, tlen
);
658 if (nbytes
!= tlen
) {
659 ubik_dprint("Rx-read bulk error=%d\n", code
= BULK_ERROR
);
664 nbytes
= write(fd
, tbuffer
, tlen
);
666 if (nbytes
!= tlen
) {
677 code
= EndDISK_GetFile(rxcall
, &tversion
);
679 code
= rx_EndCall(rxcall
, code
);
681 /* we got a new file, set up its header */
682 urecovery_state
|= UBIK_RECHAVEDB
;
684 memcpy(&ubik_dbase
->version
, &tversion
,
685 sizeof(struct ubik_version
));
686 snprintf(tbuffer
, sizeof(tbuffer
), "%s.DB%s%d",
687 ubik_dbase
->pathName
, (file
<0)?"SYS":"",
688 (file
<0)?-file
:file
);
690 snprintf(pbuffer
, sizeof(pbuffer
), "%s.DB%s%d.OLD",
691 ubik_dbase
->pathName
, (file
<0)?"SYS":"",
692 (file
<0)?-file
:file
);
693 code
= unlink(pbuffer
);
695 code
= rename(tbuffer
, pbuffer
);
696 snprintf(pbuffer
, sizeof(pbuffer
), "%s.DB%s%d.TMP",
697 ubik_dbase
->pathName
, (file
<0)?"SYS":"",
698 (file
<0)?-file
:file
);
701 code
= rename(pbuffer
, tbuffer
);
703 (*ubik_dbase
->open
) (ubik_dbase
, file
);
704 /* after data is good, sync disk with correct label */
706 (*ubik_dbase
->setlabel
) (ubik_dbase
, 0,
707 &ubik_dbase
->version
);
711 snprintf(pbuffer
, sizeof(pbuffer
), "%s.DB%s%d.OLD",
712 ubik_dbase
->pathName
, (file
<0)?"SYS":"",
713 (file
<0)?-file
:file
);
720 * We will effectively invalidate the old data forever now.
721 * Unclear if we *should* but we do.
724 ubik_dbase
->version
.epoch
= 0;
725 ubik_dbase
->version
.counter
= 0;
727 ubik_print("Ubik: Synchronize database failed (error = %d)\n",
730 ubik_print("Ubik: Synchronize database completed\n");
731 urecovery_state
|= UBIK_RECHAVEDB
;
733 udisk_Invalidate(ubik_dbase
, 0); /* data has changed */
734 #ifdef AFS_PTHREAD_ENV
735 opr_cv_broadcast(&ubik_dbase
->version_cond
);
737 LWP_NoYieldSignal(&ubik_dbase
->version
);
740 if (!(urecovery_state
& UBIK_RECHAVEDB
)) {
742 continue; /* not ready */
745 /* If the database was newly initialized, then when we establish quorum, write
746 * a new label. This allows urecovery_AllBetter() to allow access for reads.
747 * Setting it to 2 also allows another site to come along with a newer
748 * database and overwrite this one.
750 if (ubik_dbase
->version
.epoch
== 1) {
751 urecovery_AbortAll(ubik_dbase
);
753 ubik_dbase
->version
.epoch
= 2;
754 ubik_dbase
->version
.counter
= 1;
756 (*ubik_dbase
->setlabel
) (ubik_dbase
, 0, &ubik_dbase
->version
);
758 udisk_Invalidate(ubik_dbase
, 0); /* data may have changed */
759 #ifdef AFS_PTHREAD_ENV
760 opr_cv_broadcast(&ubik_dbase
->version_cond
);
762 LWP_NoYieldSignal(&ubik_dbase
->version
);
766 /* Check the other sites and send the database to them if they
767 * do not have the current db.
769 if (!(urecovery_state
& UBIK_RECSENTDB
)) {
770 /* now propagate out new version to everyone else */
771 dbok
= 1; /* start off assuming they all worked */
774 * Check if a write transaction is in progress. We can't send the
775 * db when a write is in progress here because the db would be
776 * obsolete as soon as it goes there. Also, ops after the begin
777 * trans would reach the recepient and wouldn't find a transaction
778 * pending there. Frankly, I don't think it's possible to get past
779 * the write-lock above if there is a write transaction in progress,
780 * but then, it won't hurt to check, will it?
782 if (ubik_dbase
->flags
& DBWRITING
) {
785 long cur_usec
= 50000;
786 while ((ubik_dbase
->flags
& DBWRITING
) && (safety
< 500)) {
788 /* sleep for a little while */
790 tv
.tv_usec
= cur_usec
;
791 #ifdef AFS_PTHREAD_ENV
792 select(0, 0, 0, 0, &tv
);
794 IOMGR_Select(0, 0, 0, 0, &tv
);
802 for (ts
= ubik_servers
; ts
; ts
= ts
->next
) {
804 inAddr
.s_addr
= ts
->addr
[0];
809 ubik_dprint("recovery cannot send version to %s\n",
810 afs_inet_ntoa_r(inAddr
.s_addr
, hoststr
));
815 ubik_dprint("recovery sending version to %s\n",
816 afs_inet_ntoa_r(inAddr
.s_addr
, hoststr
));
817 if (vcmp(ts
->version
, ubik_dbase
->version
) != 0) {
818 ubik_dprint("recovery stating local database\n");
820 /* Rx code to do the Bulk Store */
821 code
= (*ubik_dbase
->stat
) (ubik_dbase
, 0, &ubikstat
);
823 length
= ubikstat
.size
;
826 rxcall
= rx_NewCall(ts
->disk_rxcid
);
829 StartDISK_SendFile(rxcall
, file
, length
,
830 &ubik_dbase
->version
);
832 ubik_dprint("StartDiskSendFile failed=%d\n",
839 sizeof(tbuffer
) ? sizeof(tbuffer
) : length
);
841 (*ubik_dbase
->read
) (ubik_dbase
, file
,
842 tbuffer
, offset
, tlen
);
843 if (nbytes
!= tlen
) {
844 ubik_dprint("Local disk read error=%d\n",
848 nbytes
= rx_Write(rxcall
, tbuffer
, tlen
);
849 if (nbytes
!= tlen
) {
850 ubik_dprint("Rx-write bulk error=%d\n", code
=
857 code
= EndDISK_SendFile(rxcall
);
859 code
= rx_EndCall(rxcall
, code
);
862 /* we set a new file, process its header */
863 ts
->version
= ubik_dbase
->version
;
868 /* mark file up to date */
873 urecovery_state
|= UBIK_RECSENTDB
;
881 * \brief send a Probe to all the network address of this server
883 * \return 0 if success, else return 1
886 DoProbe(struct ubik_server
*server
)
888 struct rx_connection
*conns
[UBIK_MAX_INTERFACE_ADDR
];
889 struct rx_connection
*connSuccess
= 0;
890 int i
, nconns
, success_i
= -1;
896 for (i
= 0; (i
< UBIK_MAX_INTERFACE_ADDR
) && (addr
= server
->addr
[i
]);
899 rx_NewConnection(addr
, ubik_callPortal
, DISK_SERVICE_ID
,
900 addr_globals
.ubikSecClass
, addr_globals
.ubikSecIndex
);
902 /* user requirement to use only the primary interface */
903 if (ubikPrimaryAddrOnly
) {
910 opr_Assert(nconns
); /* at least one interface address for this server */
912 multi_Rx(conns
, nconns
) {
914 if (!multi_error
) { /* first success */
921 if (success_i
>= 0) {
923 addr
= server
->addr
[success_i
]; /* successful interface addr */
925 if (server
->disk_rxcid
) /* destroy existing conn */
926 rx_DestroyConnection(server
->disk_rxcid
);
927 if (server
->vote_rxcid
)
928 rx_DestroyConnection(server
->vote_rxcid
);
930 /* make new connections */
931 server
->disk_rxcid
= conns
[success_i
];
932 server
->vote_rxcid
= rx_NewConnection(addr
, ubik_callPortal
,
933 VOTE_SERVICE_ID
, addr_globals
.ubikSecClass
,
934 addr_globals
.ubikSecIndex
);
936 connSuccess
= conns
[success_i
];
937 strcpy(buffer
, afs_inet_ntoa_r(server
->addr
[0], hoststr
));
939 ubik_print("ubik:server %s is back up: will be contacted through %s\n",
940 buffer
, afs_inet_ntoa_r(addr
, hoststr
));
944 /* Destroy all connections except the one on which we succeeded */
945 for (i
= 0; i
< nconns
; i
++)
946 if (conns
[i
] != connSuccess
)
947 rx_DestroyConnection(conns
[i
]);
950 ubik_dprint("ubik:server %s still down\n",
951 afs_inet_ntoa_r(server
->addr
[0], hoststr
));
954 return 0; /* success */
956 return 1; /* failure */