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>
11 #include <afs/afs_args.h>
18 #include <sys/socket.h>
25 #include <rx_pthread.h>
28 #include <WINNT/syscfg.h>
29 #include <WINNT/afsreg.h>
30 #include <../afsrdr/kif.h>
32 /*extern void afsi_log(char *pattern, ...);*/
34 /* read/write lock for all global storage in this module */
35 osi_rwlock_t cm_callbackLock;
37 #ifdef AFS_FREELANCE_CLIENT
38 extern osi_mutex_t cm_Freelance_Lock;
41 /* count of # of callback breaking messages received by this CM so far. We use
42 * this count in determining whether there have been any callback breaks that
43 * apply to a call that returned a new callback. If the counter doesn't
44 * increase during a call, then we know that no callbacks were broken during
45 * that call, and thus that the callback that was just returned is still valid.
47 long cm_callbackCount;
49 /* count of number of RPCs potentially returning a callback executing now.
50 * When this counter hits zero, we can clear out the racing revokes list, since
51 * at that time, we know that none of the just-executed callback revokes will
52 * apply to any future call that returns a callback (since the latter hasn't
53 * even started execution yet).
55 long cm_activeCallbackGrantingCalls;
57 /* list of callbacks that have been broken recently. If a call returning a
58 * callback is executing and a callback revoke runs immediately after it at the
59 * server, the revoke may end up being processed before the response to the
60 * original callback granting call. We detect this by keeping a list of
61 * callback revokes that have been received since we *started* the callback
62 * granting call, and discarding any callbacks received for the same file ID,
63 * even if the callback revoke was received before the callback grant.
65 cm_racingRevokes_t *cm_racingRevokesp;
67 /* record a (potentially) racing revoke for this file ID; null means for all
68 * file IDs, and is used by InitCallBackState.
70 * The cancelFlags describe whether we're just discarding callbacks for the same
71 * file ID, the same volume, or all from the same server.
73 * Called with no locks held.
75 void cm_RecordRacingRevoke(cm_fid_t *fidp, long cancelFlags)
77 cm_racingRevokes_t *rp;
79 lock_ObtainWrite(&cm_callbackLock);
81 osi_Log3(afsd_logp, "RecordRacingRevoke Volume %d Flags %lX activeCalls %d",
82 fidp ? fidp->volume : 0, cancelFlags, cm_activeCallbackGrantingCalls);
84 if (cm_activeCallbackGrantingCalls > 0) {
85 rp = malloc(sizeof(*rp));
86 memset(rp, 0, sizeof(*rp));
87 osi_QAdd((osi_queue_t **) &cm_racingRevokesp, &rp->q);
88 rp->flags |= (cancelFlags & CM_RACINGFLAG_ALL);
89 if (fidp) rp->fid = *fidp;
90 rp->callbackCount = ++cm_callbackCount;
92 lock_ReleaseWrite(&cm_callbackLock);
96 * When we lose a callback, may have to send change notification replies.
97 * Do not call with a lock on the scp.
99 void cm_CallbackNotifyChange(cm_scache_t *scp)
105 /* why does this have to query the registry each time? */
106 if (RegOpenKeyEx( HKEY_LOCAL_MACHINE,
107 AFSREG_CLT_OPENAFS_SUBKEY,
109 KEY_READ|KEY_QUERY_VALUE,
110 &hKey) == ERROR_SUCCESS) {
112 dummyLen = sizeof(DWORD);
113 RegQueryValueEx(hKey, "CallBack Notify Change Delay", NULL, NULL,
114 (BYTE *) &dwDelay, &dummyLen);
118 if (dwDelay > 5000) /* do not allow a delay of more then 5 seconds */
121 osi_Log3(afsd_logp, "CallbackNotifyChange FileType %d Flags %lX Delay %dms",
122 scp->fileType, scp->flags, dwDelay);
127 /* for directories, this sends a change notification on the dir itself */
128 if (scp->fileType == CM_SCACHETYPE_DIRECTORY) {
130 if (scp->flags & CM_SCACHEFLAG_ANYWATCH)
132 FILE_NOTIFY_GENERIC_DIRECTORY_FILTER,
133 scp, NULL, NULL, TRUE);
135 dc_break_callback(FID_HASH_FN(&scp->fid));
138 /* and for files, this sends a change notification on the file's parent dir */
142 tfid.cell = scp->fid.cell;
143 tfid.volume = scp->fid.volume;
144 tfid.vnode = scp->parentVnode;
145 tfid.unique = scp->parentUnique;
146 dscp = cm_FindSCache(&tfid);
149 dscp->flags & CM_SCACHEFLAG_ANYWATCH )
151 FILE_NOTIFY_GENERIC_FILE_FILTER,
152 dscp, NULL, NULL, TRUE);
155 dc_break_callback(FID_HASH_FN(&dscp->fid));
158 cm_ReleaseSCache(dscp);
162 /* called with no locks held for every file ID that is revoked directly by
163 * a callback revoke call. Does not have to handle volume callback breaks,
164 * since those have already been split out.
166 * The callp parameter is currently unused.
168 void cm_RevokeCallback(struct rx_call *callp, AFSFid *fidp)
174 /* don't bother setting cell, since we won't be checking it (to aid
175 * in working with multi-homed servers: we don't know the cell if we
176 * don't recognize the IP address).
179 tfid.volume = fidp->Volume;
180 tfid.vnode = fidp->Vnode;
181 tfid.unique = fidp->Unique;
182 hash = CM_SCACHE_HASH(&tfid);
184 osi_Log3(afsd_logp, "RevokeCallback vol %u vn %u uniq %u",
185 fidp->Volume, fidp->Vnode, fidp->Unique);
187 /* do this first, so that if we're executing a callback granting call
188 * at this moment, we kill it before it can be merged in. Otherwise,
189 * it could complete while we're doing the scan below, and get missed
190 * by both the scan and by this code.
192 cm_RecordRacingRevoke(&tfid, 0);
194 lock_ObtainWrite(&cm_scacheLock);
195 /* do all in the hash bucket, since we don't know how many we'll find with
198 for (scp = cm_data.hashTablep[hash]; scp; scp=scp->nextp) {
199 if (scp->fid.volume == tfid.volume &&
200 scp->fid.vnode == tfid.vnode &&
201 scp->fid.unique == tfid.unique &&
202 scp->cbExpires > 0 &&
203 scp->cbServerp != NULL)
205 cm_HoldSCacheNoLock(scp);
206 lock_ReleaseWrite(&cm_scacheLock);
207 osi_Log4(afsd_logp, "RevokeCallback Discarding SCache scp 0x%x vol %u vn %u uniq %u",
208 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
209 lock_ObtainMutex(&scp->mx);
210 cm_DiscardSCache(scp);
211 lock_ReleaseMutex(&scp->mx);
212 cm_CallbackNotifyChange(scp);
213 lock_ObtainWrite(&cm_scacheLock);
214 cm_ReleaseSCacheNoLock(scp);
217 lock_ReleaseWrite(&cm_scacheLock);
219 osi_Log3(afsd_logp, "RevokeCallback Complete vol %u vn %u uniq %u",
220 fidp->Volume, fidp->Vnode, fidp->Unique);
223 /* called to revoke a volume callback, which is typically issued when a volume
224 * is moved from one server to another.
226 * Called with no locks held.
228 void cm_RevokeVolumeCallback(struct rx_call *callp, AFSFid *fidp)
234 osi_Log1(afsd_logp, "RevokeVolumeCallback vol %d", fidp->Volume);
236 /* do this first, so that if we're executing a callback granting call
237 * at this moment, we kill it before it can be merged in. Otherwise,
238 * it could complete while we're doing the scan below, and get missed
239 * by both the scan and by this code.
241 tfid.cell = tfid.vnode = tfid.unique = 0;
242 tfid.volume = fidp->Volume;
243 cm_RecordRacingRevoke(&tfid, CM_RACINGFLAG_CANCELVOL);
246 lock_ObtainWrite(&cm_scacheLock);
247 for (hash = 0; hash < cm_data.hashTableSize; hash++) {
248 for(scp=cm_data.hashTablep[hash]; scp; scp=scp->nextp) {
249 if (scp->fid.volume == fidp->Volume &&
250 scp->cbExpires > 0 &&
251 scp->cbServerp != NULL) {
252 cm_HoldSCacheNoLock(scp);
253 lock_ReleaseWrite(&cm_scacheLock);
254 lock_ObtainMutex(&scp->mx);
255 osi_Log4(afsd_logp, "RevokeVolumeCallback Discarding SCache scp 0x%x vol %u vn %u uniq %u",
256 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
257 cm_DiscardSCache(scp);
258 lock_ReleaseMutex(&scp->mx);
259 cm_CallbackNotifyChange(scp);
260 lock_ObtainWrite(&cm_scacheLock);
261 cm_ReleaseSCacheNoLock(scp);
263 } /* search one hash bucket */
264 } /* search all hash buckets */
266 lock_ReleaseWrite(&cm_scacheLock);
268 osi_Log1(afsd_logp, "RevokeVolumeCallback Complete vol %d", fidp->Volume);
272 * afs_data_pointer_to_int32() - returns least significant afs_int32 of the
273 * given data pointer, without triggering "cast truncates pointer"
274 * warnings. We use this where we explicitly don't care whether a
275 * pointer is truncated -- it loses information where a pointer is
276 * larger than an afs_int32.
280 afs_data_pointer_to_int32(const void *p)
283 afs_int32 i32[sizeof(void *) / sizeof(afs_int32)];
287 int i32_sub; /* subscript of least significant afs_int32 in ip.i32[] */
292 /* used to determine the byte order of the system */
295 char c[sizeof(int) / sizeof(char)];
301 /* little-endian system */
304 /* big-endian system */
305 i32_sub = (sizeof ip.i32 / sizeof ip.i32[0]) - 1;
310 return ip.i32[i32_sub];
312 /*------------------------------------------------------------------------
313 * EXPORTED SRXAFSCB_CallBack
316 * Routine called by the server-side callback RPC interface to
317 * implement passing in callback information.
321 * rx_call : Ptr to Rx call on which this request came in.
322 * fidsArrayp : Ptr to array of fids involved.
323 * cbsArrayp : Ptr to matching callback info for the fids.
329 * Nothing interesting.
333 *------------------------------------------------------------------------*/
334 /* handle incoming RPC callback breaking message.
335 * Called with no locks held.
338 SRXAFSCB_CallBack(struct rx_call *callp, AFSCBFids *fidsArrayp, AFSCBs *cbsArrayp)
342 struct rx_connection *connp;
343 struct rx_peer *peerp;
344 unsigned long host = 0;
345 unsigned short port = 0;
347 MUTEX_ENTER(&callp->lock);
349 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
350 host = rx_HostOf(peerp);
351 port = rx_PortOf(peerp);
354 osi_Log2(afsd_logp, "SRXAFSCB_CallBack from host 0x%x port %d",
358 for (i=0; i < (long) fidsArrayp->AFSCBFids_len; i++) {
359 tfidp = &fidsArrayp->AFSCBFids_val[i];
361 if (tfidp->Volume == 0)
362 continue; /* means don't do anything */
363 else if (tfidp->Vnode == 0)
364 cm_RevokeVolumeCallback(callp, tfidp);
366 cm_RevokeCallback(callp, tfidp);
369 MUTEX_EXIT(&callp->lock);
373 /*------------------------------------------------------------------------
374 * EXPORTED SRXAFSCB_InitCallBackState
377 * Routine called by the server-side callback RPC interface to
378 * implement clearing all callbacks from this host.
381 * rx_call : Ptr to Rx call on which this request came in.
387 * Nothing interesting.
391 *------------------------------------------------------------------------*/
392 /* called with no locks by RPC system when a server indicates that it has never
393 * heard from us, or for other reasons has had to discard callbacks from us
394 * without telling us, e.g. a network partition.
397 SRXAFSCB_InitCallBackState(struct rx_call *callp)
399 struct sockaddr_in taddr;
404 struct rx_connection *connp;
405 struct rx_peer *peerp;
406 unsigned long host = 0;
407 unsigned short port = 0;
409 MUTEX_ENTER(&callp->lock);
411 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
412 host = rx_HostOf(peerp);
413 port = rx_PortOf(peerp);
416 osi_Log2(afsd_logp, "SRXAFSCB_InitCallBackState from host 0x%x port %d",
420 if ((rx_ConnectionOf(callp)) && (rx_PeerOf(rx_ConnectionOf(callp)))) {
421 taddr.sin_family = AF_INET;
422 taddr.sin_addr.s_addr = rx_HostOf(rx_PeerOf(rx_ConnectionOf(callp)));
424 tsp = cm_FindServer(&taddr, CM_SERVER_FILE);
426 osi_Log1(afsd_logp, "Init Callback State server %x", tsp);
428 /* record the callback in the racing revokes structure. This
429 * shouldn't be necessary, since we shouldn't be making callback
430 * granting calls while we're going to get an initstate call,
431 * but there probably are some obscure races, so better safe
434 * We do this first since we don't hold the cm_scacheLock and vnode
435 * locks over the entire callback scan operation below. The
436 * big loop below is guaranteed to hit any callback already
437 * processed. The call to RecordRacingRevoke is guaranteed
438 * to kill any callback that is currently being returned.
439 * Anything that sneaks past both must start
440 * after the call to RecordRacingRevoke.
442 cm_RecordRacingRevoke(NULL, CM_RACINGFLAG_CANCELALL);
444 /* now search all vnodes looking for guys with this callback, if we
445 * found it, or guys with any callbacks, if we didn't find the server
446 * (that's how multihomed machines will appear and how we'll handle
447 * them, albeit a little inefficiently). That is, we're discarding all
448 * callbacks from all hosts if we get an initstate call from an unknown
449 * host. Since these calls are rare, and multihomed servers
450 * are "rare," hopefully this won't be a problem.
452 lock_ObtainWrite(&cm_scacheLock);
453 for (hash = 0; hash < cm_data.hashTableSize; hash++) {
454 for (scp=cm_data.hashTablep[hash]; scp; scp=scp->nextp) {
455 cm_HoldSCacheNoLock(scp);
456 lock_ReleaseWrite(&cm_scacheLock);
457 lock_ObtainMutex(&scp->mx);
459 if (scp->cbExpires > 0 && scp->cbServerp != NULL) {
460 /* we have a callback, now decide if we should clear it */
461 if (scp->cbServerp == tsp || tsp == NULL) {
462 osi_Log4(afsd_logp, "InitCallbackState Discarding SCache scp 0x%x vol %u vn %u uniq %u",
463 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
464 cm_DiscardSCache(scp);
468 lock_ReleaseMutex(&scp->mx);
470 cm_CallbackNotifyChange(scp);
471 lock_ObtainWrite(&cm_scacheLock);
472 cm_ReleaseSCacheNoLock(scp);
473 } /* search one hash bucket */
474 } /* search all hash buckets */
476 lock_ReleaseWrite(&cm_scacheLock);
478 /* we're done with the server structure */
482 MUTEX_EXIT(&callp->lock);
486 /*------------------------------------------------------------------------
487 * EXPORTED SRXAFSCB_Probe
490 * Routine called by the server-side callback RPC interface to
491 * implement ``probing'' the Cache Manager, just making sure it's
495 * rx_call : Ptr to Rx call on which this request came in.
501 * Nothing interesting.
505 *------------------------------------------------------------------------*/
507 SRXAFSCB_Probe(struct rx_call *callp)
509 struct rx_connection *connp;
510 struct rx_peer *peerp;
511 unsigned long host = 0;
512 unsigned short port = 0;
514 MUTEX_ENTER(&callp->lock);
516 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
517 host = rx_HostOf(peerp);
518 port = rx_PortOf(peerp);
521 osi_Log2(afsd_logp, "SRXAFSCB_Probe from host 0x%x port %d",
525 MUTEX_EXIT(&callp->lock);
529 /*------------------------------------------------------------------------
530 * EXPORTED SRXAFSCB_GetLock
533 * Routine called by the server-side callback RPC interface to
534 * implement pulling out the contents of a lock in the lock
538 * a_call : Ptr to Rx call on which this request came in.
539 * a_index : Index of desired lock.
540 * a_result : Ptr to a buffer for the given lock.
543 * 0 if everything went fine,
544 * 1 if we were given a bad index.
547 * Nothing interesting.
551 *------------------------------------------------------------------------*/
552 /* debug interface */
554 extern osi_rwlock_t cm_aclLock;
555 extern osi_rwlock_t buf_globalLock;
556 extern osi_rwlock_t cm_callbackLock;
557 extern osi_rwlock_t cm_cellLock;
558 extern osi_rwlock_t cm_connLock;
559 extern osi_rwlock_t cm_daemonLock;
560 extern osi_rwlock_t cm_dnlcLock;
561 extern osi_rwlock_t cm_scacheLock;
562 extern osi_rwlock_t cm_serverLock;
563 extern osi_rwlock_t cm_userLock;
564 extern osi_rwlock_t cm_utilsLock;
565 extern osi_rwlock_t cm_volumeLock;
566 extern osi_rwlock_t smb_globalLock;
567 extern osi_rwlock_t smb_rctLock;
569 extern osi_mutex_t cm_Freelance_Lock;
570 extern osi_mutex_t cm_bufGetMutex;
571 extern osi_mutex_t cm_Afsdsbmt_Lock;
572 extern osi_mutex_t tokenEventLock;
573 extern osi_mutex_t smb_ListenerLock;
574 extern osi_mutex_t smb_RawBufLock;
575 extern osi_mutex_t smb_Dir_Watch_Lock;
577 #define LOCKTYPE_RW 1
578 #define LOCKTYPE_MUTEX 2
579 static struct _ltable {
584 {"cm_scacheLock", (char*)&cm_scacheLock, LOCKTYPE_RW},
585 {"buf_globalLock", (char*)&buf_globalLock, LOCKTYPE_RW},
586 {"cm_serverLock", (char*)&cm_serverLock, LOCKTYPE_RW},
587 {"cm_callbackLock", (char*)&cm_callbackLock, LOCKTYPE_RW},
588 {"cm_aclLock", (char*)&cm_aclLock, LOCKTYPE_RW},
589 {"cm_cellLock", (char*)&cm_cellLock, LOCKTYPE_RW},
590 {"cm_connLock", (char*)&cm_connLock, LOCKTYPE_RW},
591 {"cm_userLock", (char*)&cm_userLock, LOCKTYPE_RW},
592 {"cm_volumeLock", (char*)&cm_volumeLock, LOCKTYPE_RW},
593 {"cm_daemonLock", (char*)&cm_daemonLock, LOCKTYPE_RW},
594 {"cm_dnlcLock", (char*)&cm_dnlcLock, LOCKTYPE_RW},
595 {"cm_utilsLock", (char*)&cm_utilsLock, LOCKTYPE_RW},
596 {"smb_globalLock", (char*)&smb_globalLock, LOCKTYPE_RW},
597 {"smb_rctLock", (char*)&smb_rctLock, LOCKTYPE_RW},
598 {"cm_Freelance_Lock",(char*)&cm_Freelance_Lock, LOCKTYPE_MUTEX},
599 {"cm_bufGetMutex", (char*)&cm_bufGetMutex, LOCKTYPE_MUTEX},
600 {"cm_Afsdsbmt_Lock", (char*)&cm_Afsdsbmt_Lock, LOCKTYPE_MUTEX},
601 {"tokenEventLock", (char*)&tokenEventLock, LOCKTYPE_MUTEX},
602 {"smb_ListenerLock", (char*)&smb_ListenerLock, LOCKTYPE_MUTEX},
603 {"smb_RawBufLock", (char*)&smb_RawBufLock, LOCKTYPE_MUTEX},
604 {"smb_Dir_Watch_Lock",(char*)&smb_Dir_Watch_Lock, LOCKTYPE_MUTEX}
608 SRXAFSCB_GetLock(struct rx_call *callp, long index, AFSDBLock *lockp)
610 struct _ltable *tl; /*Ptr to lock table entry */
613 int nentries; /*Num entries in table */
614 int code; /*Return code */
615 struct rx_connection *connp;
616 struct rx_peer *peerp;
617 unsigned long host = 0;
618 unsigned short port = 0;
620 MUTEX_ENTER(&callp->lock);
622 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
623 host = rx_HostOf(peerp);
624 port = rx_PortOf(peerp);
627 osi_Log3(afsd_logp, "SRXAFSCB_GetLock(%d) from host 0x%x port %d",
628 index, ntohl(host), ntohs(port));
630 nentries = sizeof(ltable) / sizeof(struct _ltable);
631 if (index < 0 || index >= nentries) {
638 * Found it - copy out its contents.
641 strncpy(lockp->name, tl->name, sizeof(lockp->name));
642 lockp->name[sizeof(lockp->name)-1] = '\0';
643 lockp->lock.waitStates = 0;
644 switch ( tl->type ) {
646 rwp = (osi_rwlock_t *)tl->addr;
647 lockp->lock.exclLocked = rwp->flags;
648 lockp->lock.readersReading = rwp->readers;
649 lockp->lock.numWaiting = rwp->waiters;
652 mtxp = (osi_mutex_t *)tl->addr;
653 lockp->lock.exclLocked = mtxp->flags;
654 lockp->lock.readersReading = 0;
655 lockp->lock.numWaiting = mtxp->waiters;
658 lockp->lock.pid_last_reader = 0;
659 lockp->lock.pid_writer = 0;
660 lockp->lock.src_indicator = 0;
664 MUTEX_EXIT(&callp->lock);
668 /* debug interface */
670 SRXAFSCB_GetCE(struct rx_call *callp, long index, AFSDBCacheEntry *cep)
675 struct rx_connection *connp;
676 struct rx_peer *peerp;
677 unsigned long host = 0;
678 unsigned short port = 0;
680 MUTEX_ENTER(&callp->lock);
682 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
683 host = rx_HostOf(peerp);
684 port = rx_PortOf(peerp);
687 osi_Log2(afsd_logp, "SRXAFSCB_GetCE from host 0x%x port %d",
688 ntohl(host), ntohs(port));
690 lock_ObtainRead(&cm_scacheLock);
691 for (i = 0; i < cm_data.hashTableSize; i++) {
692 for (scp = cm_data.hashTablep[i]; scp; scp = scp->nextp) {
696 } /*Zip through current hash chain */
697 } /*Zip through hash chains */
707 * Copy out the located entry.
709 memset(cep, 0, sizeof(AFSDBCacheEntry));
710 cep->addr = afs_data_pointer_to_int32(scp);
711 cep->cell = scp->fid.cell;
712 cep->netFid.Volume = scp->fid.volume;
713 cep->netFid.Vnode = scp->fid.vnode;
714 cep->netFid.Unique = scp->fid.unique;
715 cep->lock.waitStates = 0;
716 cep->lock.exclLocked = scp->mx.flags;
717 cep->lock.readersReading = 0;
718 cep->lock.numWaiting = scp->mx.waiters;
719 cep->lock.pid_last_reader = 0;
720 cep->lock.pid_writer = 0;
721 cep->lock.src_indicator = 0;
722 cep->Length = scp->length.LowPart;
723 cep->DataVersion = scp->dataVersion;
724 cep->callback = afs_data_pointer_to_int32(scp->cbServerp);
725 cep->cbExpires = scp->cbExpires;
726 cep->refCount = scp->refCount;
727 cep->opens = scp->openReads;
728 cep->writers = scp->openWrites;
729 switch (scp->fileType) {
730 case CM_SCACHETYPE_FILE:
733 case CM_SCACHETYPE_MOUNTPOINT:
736 case CM_SCACHETYPE_DIRECTORY:
737 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
742 case CM_SCACHETYPE_SYMLINK:
745 case CM_SCACHETYPE_DFSLINK:
748 case CM_SCACHETYPE_INVALID:
753 if (scp->flags & CM_SCACHEFLAG_STATD)
755 if (scp->flags & CM_SCACHEFLAG_RO || scp->flags & CM_SCACHEFLAG_PURERO)
757 if (scp->fileType == CM_SCACHETYPE_MOUNTPOINT &&
758 scp->mountPointStringp[0])
760 if (scp->flags & CM_SCACHEFLAG_WAITING)
765 * Return our results.
768 lock_ReleaseRead(&cm_scacheLock);
770 MUTEX_EXIT(&callp->lock);
774 /* debug interface */
776 SRXAFSCB_GetCE64(struct rx_call *callp, long index, AFSDBCacheEntry64 *cep)
781 struct rx_connection *connp;
782 struct rx_peer *peerp;
783 unsigned long host = 0;
784 unsigned short port = 0;
786 MUTEX_ENTER(&callp->lock);
788 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
789 host = rx_HostOf(peerp);
790 port = rx_PortOf(peerp);
793 osi_Log2(afsd_logp, "SRXAFSCB_GetCE64 from host 0x%x port %d",
794 ntohl(host), ntohs(port));
796 lock_ObtainRead(&cm_scacheLock);
797 for (i = 0; i < cm_data.hashTableSize; i++) {
798 for (scp = cm_data.hashTablep[i]; scp; scp = scp->nextp) {
802 } /*Zip through current hash chain */
803 } /*Zip through hash chains */
813 * Copy out the located entry.
815 memset(cep, 0, sizeof(AFSDBCacheEntry64));
816 cep->addr = afs_data_pointer_to_int32(scp);
817 cep->cell = scp->fid.cell;
818 cep->netFid.Volume = scp->fid.volume;
819 cep->netFid.Vnode = scp->fid.vnode;
820 cep->netFid.Unique = scp->fid.unique;
821 cep->lock.waitStates = 0;
822 cep->lock.exclLocked = scp->mx.flags;
823 cep->lock.readersReading = 0;
824 cep->lock.numWaiting = scp->mx.waiters;
825 cep->lock.pid_last_reader = 0;
826 cep->lock.pid_writer = 0;
827 cep->lock.src_indicator = 0;
828 #if !defined(AFS_64BIT_ENV)
829 cep->Length.high = scp->length.HighPart;
830 cep->Length.low = scp->length.LowPart;
832 cep->Length = ((afs_int64)scp->length.HighPart)<<32 | scp->length.LowPart;
834 cep->DataVersion = scp->dataVersion;
835 cep->callback = afs_data_pointer_to_int32(scp->cbServerp);
836 cep->cbExpires = scp->cbExpires;
837 cep->refCount = scp->refCount;
838 cep->opens = scp->openReads;
839 cep->writers = scp->openWrites;
840 switch (scp->fileType) {
841 case CM_SCACHETYPE_FILE:
844 case CM_SCACHETYPE_MOUNTPOINT:
847 case CM_SCACHETYPE_DIRECTORY:
848 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
853 case CM_SCACHETYPE_SYMLINK:
856 case CM_SCACHETYPE_DFSLINK:
859 case CM_SCACHETYPE_INVALID:
864 if (scp->flags & CM_SCACHEFLAG_STATD)
866 if (scp->flags & CM_SCACHEFLAG_RO || scp->flags & CM_SCACHEFLAG_PURERO)
868 if (scp->fileType == CM_SCACHETYPE_MOUNTPOINT &&
869 scp->mountPointStringp[0])
871 if (scp->flags & CM_SCACHEFLAG_WAITING)
876 * Return our results.
879 lock_ReleaseRead(&cm_scacheLock);
881 MUTEX_EXIT(&callp->lock);
885 /* debug interface: not implemented */
887 SRXAFSCB_XStatsVersion(struct rx_call *callp, long *vp)
889 struct rx_connection *connp;
890 struct rx_peer *peerp;
891 unsigned long host = 0;
892 unsigned short port = 0;
894 MUTEX_ENTER(&callp->lock);
896 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
897 host = rx_HostOf(peerp);
898 port = rx_PortOf(peerp);
901 osi_Log2(afsd_logp, "SRXAFSCB_XStatsVersion from host 0x%x port %d - not implemented",
902 ntohl(host), ntohs(port));
905 MUTEX_EXIT(&callp->lock);
909 /* debug interface: not implemented */
911 SRXAFSCB_GetXStats(struct rx_call *callp, long cvn, long coln, long *srvp, long *timep,
912 AFSCB_CollData *datap)
914 struct rx_connection *connp;
915 struct rx_peer *peerp;
916 unsigned long host = 0;
917 unsigned short port = 0;
919 MUTEX_ENTER(&callp->lock);
921 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
922 host = rx_HostOf(peerp);
923 port = rx_PortOf(peerp);
926 osi_Log2(afsd_logp, "SRXAFSCB_GetXStats from host 0x%x port %d - not implemented",
927 ntohl(host), ntohs(port));
929 MUTEX_EXIT(&callp->lock);
934 SRXAFSCB_InitCallBackState2(struct rx_call *callp, struct interfaceAddr* addr)
936 osi_Log0(afsd_logp, "SRXAFSCB_InitCallBackState2 ->");
938 return SRXAFSCB_InitCallBackState(callp);
941 /* debug interface */
943 SRXAFSCB_WhoAreYou(struct rx_call *callp, struct interfaceAddr* addr)
946 int cm_noIPAddr; /* number of client network interfaces */
947 int cm_IPAddr[CM_MAXINTERFACE_ADDR]; /* client's IP address in host order */
948 int cm_SubnetMask[CM_MAXINTERFACE_ADDR];/* client's subnet mask in host order*/
949 int cm_NetMtu[CM_MAXINTERFACE_ADDR]; /* client's MTU sizes */
950 int cm_NetFlags[CM_MAXINTERFACE_ADDR]; /* network flags */
952 struct rx_connection *connp;
953 struct rx_peer *peerp;
954 unsigned long host = 0;
955 unsigned short port = 0;
957 MUTEX_ENTER(&callp->lock);
959 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
960 host = rx_HostOf(peerp);
961 port = rx_PortOf(peerp);
964 /* get network related info */
965 cm_noIPAddr = CM_MAXINTERFACE_ADDR;
966 code = syscfg_GetIFInfo(&cm_noIPAddr,
967 cm_IPAddr, cm_SubnetMask,
968 cm_NetMtu, cm_NetFlags);
970 /* return all network interface addresses */
971 osi_Log2(afsd_logp, "SRXAFSCB_WhoAreYou from host 0x%x port %d",
975 addr->numberOfInterfaces = cm_noIPAddr;
976 addr->uuid = cm_data.Uuid;
977 for ( i=0; i < cm_noIPAddr; i++ ) {
978 addr->addr_in[i] = cm_IPAddr[i];
979 addr->subnetmask[i] = cm_SubnetMask[i];
980 addr->mtu[i] = (rx_mtu == -1 || (rx_mtu != -1 && cm_NetMtu[i] < rx_mtu)) ?
981 cm_NetMtu[i] : rx_mtu;
984 MUTEX_EXIT(&callp->lock);
989 SRXAFSCB_InitCallBackState3(struct rx_call *callp, afsUUID* serverUuid)
993 if (UuidToString((UUID *)serverUuid, &p) == RPC_S_OK) {
994 osi_Log1(afsd_logp, "SRXAFSCB_InitCallBackState3 %s ->",p);
997 osi_Log0(afsd_logp, "SRXAFSCB_InitCallBackState3 - no server Uuid ->");
999 return SRXAFSCB_InitCallBackState(callp);
1002 /* debug interface */
1004 SRXAFSCB_ProbeUuid(struct rx_call *callp, afsUUID* clientUuid)
1006 struct rx_connection *connp;
1007 struct rx_peer *peerp;
1008 unsigned long host = 0;
1009 unsigned short port = 0;
1013 MUTEX_ENTER(&callp->lock);
1015 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1016 host = rx_HostOf(peerp);
1017 port = rx_PortOf(peerp);
1020 if ( !afs_uuid_equal(&cm_data.Uuid, clientUuid) ) {
1021 UuidToString((UUID *)&cm_data.Uuid, &p);
1022 UuidToString((UUID *)clientUuid, &q);
1023 osi_Log4(afsd_logp, "SRXAFSCB_ProbeUuid %s != %s from host 0x%x port %d",
1024 osi_LogSaveString(afsd_logp,p),
1025 osi_LogSaveString(afsd_logp,q),
1031 code = 1; /* failure */
1033 osi_Log2(afsd_logp, "SRXAFSCB_ProbeUuid (success) from host 0x%x port %d",
1037 MUTEX_EXIT(&callp->lock);
1041 /* debug interface */
1043 SRXAFSCB_GetCellByNum(struct rx_call *callp, afs_int32 a_cellnum,
1044 char **a_name, serverList *a_hosts)
1048 cm_serverRef_t * serverRefp;
1049 struct rx_connection *connp;
1050 struct rx_peer *peerp;
1051 unsigned long host = 0;
1052 unsigned short port = 0;
1054 MUTEX_ENTER(&callp->lock);
1056 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1057 host = rx_HostOf(peerp);
1058 port = rx_PortOf(peerp);
1061 osi_Log3(afsd_logp, "SRXAFSCB_GetCellByNum(%d) from host 0x%x port %d",
1062 a_cellnum, ntohl(host), ntohs(port));
1064 a_hosts->serverList_val = 0;
1065 a_hosts->serverList_len = 0;
1067 cellp = cm_FindCellByID(a_cellnum);
1069 *a_name = strdup("");
1070 MUTEX_EXIT(&callp->lock);
1074 lock_ObtainRead(&cm_serverLock);
1075 *a_name = strdup(cellp->name);
1077 for ( sn = 0, serverRefp = cellp->vlServersp;
1078 sn < AFSMAXCELLHOSTS && serverRefp;
1079 sn++, serverRefp = serverRefp->next);
1081 a_hosts->serverList_len = sn;
1082 a_hosts->serverList_val = (afs_int32 *)osi_Alloc(sn * sizeof(afs_int32));
1084 for ( sn = 0, serverRefp = cellp->vlServersp;
1085 sn < AFSMAXCELLHOSTS && serverRefp;
1086 sn++, serverRefp = serverRefp->next)
1088 a_hosts->serverList_val[sn] = ntohl(serverRefp->server->addr.sin_addr.s_addr);
1091 lock_ReleaseRead(&cm_serverLock);
1092 MUTEX_EXIT(&callp->lock);
1096 /* debug interface */
1098 SRXAFSCB_TellMeAboutYourself( struct rx_call *callp,
1099 struct interfaceAddr *addr,
1100 Capabilities * capabilities)
1103 afs_int32 *dataBuffP;
1104 afs_int32 dataBytes;
1105 int cm_noIPAddr; /* number of client network interfaces */
1106 int cm_IPAddr[CM_MAXINTERFACE_ADDR]; /* client's IP address in host order */
1107 int cm_SubnetMask[CM_MAXINTERFACE_ADDR];/* client's subnet mask in host order*/
1108 int cm_NetMtu[CM_MAXINTERFACE_ADDR]; /* client's MTU sizes */
1109 int cm_NetFlags[CM_MAXINTERFACE_ADDR]; /* network flags */
1111 struct rx_connection *connp;
1112 struct rx_peer *peerp;
1113 unsigned long host = 0;
1114 unsigned short port = 0;
1116 MUTEX_ENTER(&callp->lock);
1118 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1119 host = rx_HostOf(peerp);
1120 port = rx_PortOf(peerp);
1123 /* get network related info */
1124 cm_noIPAddr = CM_MAXINTERFACE_ADDR;
1125 code = syscfg_GetIFInfo(&cm_noIPAddr,
1126 cm_IPAddr, cm_SubnetMask,
1127 cm_NetMtu, cm_NetFlags);
1129 osi_Log2(afsd_logp, "SRXAFSCB_TellMeAboutYourself from host 0x%x port %d",
1133 /* return all network interface addresses */
1134 addr->numberOfInterfaces = cm_noIPAddr;
1135 addr->uuid = cm_data.Uuid;
1136 for ( i=0; i < cm_noIPAddr; i++ ) {
1137 addr->addr_in[i] = cm_IPAddr[i];
1138 addr->subnetmask[i] = cm_SubnetMask[i];
1139 addr->mtu[i] = (rx_mtu == -1 || (rx_mtu != -1 && cm_NetMtu[i] < rx_mtu)) ?
1140 cm_NetMtu[i] : rx_mtu;
1143 dataBytes = 1 * sizeof(afs_int32);
1144 dataBuffP = (afs_int32 *) osi_Alloc(dataBytes);
1145 dataBuffP[0] = CAPABILITY_ERRORTRANS;
1146 capabilities->Capabilities_len = dataBytes / sizeof(afs_int32);
1147 capabilities->Capabilities_val = dataBuffP;
1149 MUTEX_EXIT(&callp->lock);
1153 /*------------------------------------------------------------------------
1154 * EXPORTED SRXAFSCB_GetServerPrefs
1157 * Routine to list server preferences used by this client.
1160 * a_call : Ptr to Rx call on which this request came in.
1161 * a_index : Input server index
1162 * a_srvr_addr : Output server address (0xffffffff on last server)
1163 * a_srvr_rank : Output server rank
1169 * Nothing interesting.
1173 *------------------------------------------------------------------------*/
1175 int SRXAFSCB_GetServerPrefs(
1176 struct rx_call *callp,
1178 afs_int32 *a_srvr_addr,
1179 afs_int32 *a_srvr_rank)
1181 struct rx_connection *connp;
1182 struct rx_peer *peerp;
1183 unsigned long host = 0;
1184 unsigned short port = 0;
1186 MUTEX_ENTER(&callp->lock);
1188 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1189 host = rx_HostOf(peerp);
1190 port = rx_PortOf(peerp);
1193 osi_Log2(afsd_logp, "SRXAFSCB_GetServerPrefs from host 0x%x port %d - not implemented",
1197 *a_srvr_addr = 0xffffffff;
1198 *a_srvr_rank = 0xffffffff;
1200 MUTEX_EXIT(&callp->lock);
1204 /*------------------------------------------------------------------------
1205 * EXPORTED SRXAFSCB_GetCellServDB
1208 * Routine to list cells configured for this client
1211 * a_call : Ptr to Rx call on which this request came in.
1212 * a_index : Input cell index
1213 * a_name : Output cell name ("" on last cell)
1214 * a_hosts : Output cell database servers
1220 * Nothing interesting.
1224 *------------------------------------------------------------------------*/
1226 int SRXAFSCB_GetCellServDB(struct rx_call *callp, afs_int32 index, char **a_name,
1227 serverList *a_hosts)
1230 struct rx_connection *connp;
1231 struct rx_peer *peerp;
1232 unsigned long host = 0;
1233 unsigned short port = 0;
1235 MUTEX_ENTER(&callp->lock);
1237 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1238 host = rx_HostOf(peerp);
1239 port = rx_PortOf(peerp);
1242 osi_Log2(afsd_logp, "SRXAFSCB_GetCellServDB from host 0x%x port %d - not implemented",
1243 ntohl(host), ntohs(port));
1245 t_name = (char *)malloc(AFSNAMEMAX);
1248 a_hosts->serverList_len = 0;
1250 MUTEX_EXIT(&callp->lock);
1254 /*------------------------------------------------------------------------
1255 * EXPORTED SRXAFSCB_GetLocalCell
1258 * Routine to return name of client's local cell
1261 * a_call : Ptr to Rx call on which this request came in.
1262 * a_name : Output cell name
1268 * Nothing interesting.
1272 *------------------------------------------------------------------------*/
1274 int SRXAFSCB_GetLocalCell(struct rx_call *callp, char **a_name)
1277 struct rx_connection *connp;
1278 struct rx_peer *peerp;
1279 unsigned long host = 0;
1280 unsigned short port = 0;
1282 MUTEX_ENTER(&callp->lock);
1284 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1285 host = rx_HostOf(peerp);
1286 port = rx_PortOf(peerp);
1289 osi_Log2(afsd_logp, "SRXAFSCB_GetLocalCell from host 0x%x port %d",
1290 ntohl(host), ntohs(port));
1292 if (cm_data.rootCellp) {
1293 t_name = (char *)malloc(strlen(cm_data.rootCellp->name)+1);
1294 strcpy(t_name, cm_data.rootCellp->name);
1296 t_name = (char *)malloc(1);
1301 MUTEX_EXIT(&callp->lock);
1307 * afs_MarshallCacheConfig - marshall client cache configuration
1311 * IN callerVersion - the rpc stat version of the caller.
1313 * IN config - client cache configuration.
1315 * OUT ptr - buffer where configuration is marshalled.
1321 static void afs_MarshallCacheConfig(
1322 afs_uint32 callerVersion,
1323 cm_initparams_v1 *config,
1327 * We currently only support version 1.
1329 *(ptr++) = config->nChunkFiles;
1330 *(ptr++) = config->nStatCaches;
1331 *(ptr++) = config->nDataCaches;
1332 *(ptr++) = config->nVolumeCaches;
1333 *(ptr++) = config->firstChunkSize;
1334 *(ptr++) = config->otherChunkSize;
1335 *(ptr++) = config->cacheSize;
1336 *(ptr++) = config->setTime;
1337 *(ptr++) = config->memCache;
1342 /*------------------------------------------------------------------------
1343 * EXPORTED SRXAFSCB_GetCacheConfig
1346 * Routine to return parameters used to initialize client cache.
1347 * Client may request any format version. Server may not return
1348 * format version greater than version requested by client.
1351 * a_call: Ptr to Rx call on which this request came in.
1352 * callerVersion: Data format version desired by the client.
1353 * serverVersion: Data format version of output data.
1354 * configCount: Number bytes allocated for output data.
1355 * config: Client cache configuration.
1361 * Nothing interesting.
1365 *------------------------------------------------------------------------*/
1367 int SRXAFSCB_GetCacheConfig(struct rx_call *callp,
1368 afs_uint32 callerVersion,
1369 afs_uint32 *serverVersion,
1370 afs_uint32 *configCount,
1371 cacheConfig *config)
1373 afs_uint32 *t_config;
1375 extern cm_initparams_v1 cm_initParams;
1376 struct rx_connection *connp;
1377 struct rx_peer *peerp;
1378 unsigned long host = 0;
1379 unsigned short port = 0;
1381 MUTEX_ENTER(&callp->lock);
1383 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1384 host = rx_HostOf(peerp);
1385 port = rx_PortOf(peerp);
1388 osi_Log2(afsd_logp, "SRXAFSCB_GetCacheConfig from host 0x%x port %d - version 1 only",
1389 ntohl(host), ntohs(port));
1392 * Currently only support version 1
1394 allocsize = sizeof(cm_initparams_v1);
1395 t_config = (afs_uint32 *)malloc(allocsize);
1397 afs_MarshallCacheConfig(callerVersion, &cm_initParams, t_config);
1399 *serverVersion = AFS_CLIENT_RETRIEVAL_FIRST_EDITION;
1400 *configCount = allocsize;
1401 config->cacheConfig_val = t_config;
1402 config->cacheConfig_len = allocsize/sizeof(afs_uint32);
1404 MUTEX_EXIT(&callp->lock);
1408 /* called by afsd without any locks to initialize this module */
1409 void cm_InitCallback(void)
1411 lock_InitializeRWLock(&cm_callbackLock, "cm_callbackLock");
1412 cm_activeCallbackGrantingCalls = 0;
1415 /* called with locked scp; tells us whether we've got a callback.
1416 * Expirations are checked by a background daemon so as to make
1417 * this function as inexpensive as possible
1419 int cm_HaveCallback(cm_scache_t *scp)
1421 #ifdef AFS_FREELANCE_CLIENT
1422 // yj: we handle callbacks specially for callbacks on the root directory
1423 // Since it's local, we almost always say that we have callback on it
1424 // The only time we send back a 0 is if we're need to initialize or
1425 // reinitialize the fake directory
1427 // There are 2 state variables cm_fakeGettingCallback and cm_fakeDirCallback
1428 // cm_fakeGettingCallback is 1 if we're in the process of initialization and
1429 // hence should return false. it's 0 otherwise
1430 // cm_fakeDirCallback is 0 if we haven't loaded the fake directory, it's 1
1431 // if the fake directory is loaded and this is the first time cm_HaveCallback
1432 // is called since then. We return false in this case to allow cm_GetCallback
1433 // to be called because cm_GetCallback has some initialization work to do.
1434 // If cm_fakeDirCallback is 2, then it means that the fake directory is in
1435 // good shape and we simply return true, provided no change is detected.
1438 if (cm_freelanceEnabled &&
1439 scp->fid.cell==AFS_FAKE_ROOT_CELL_ID && scp->fid.volume==AFS_FAKE_ROOT_VOL_ID) {
1440 /* if it's something on /afs */
1441 if (!(scp->fid.vnode==0x1 && scp->fid.unique==0x1)) {
1442 /* if it's not root.afs */
1446 lock_ObtainMutex(&cm_Freelance_Lock);
1447 fdc = cm_fakeDirCallback;
1448 fgc = cm_fakeGettingCallback;
1449 lock_ReleaseMutex(&cm_Freelance_Lock);
1451 if (fdc==1) { // first call since init
1453 } else if (fdc==2 && !fgc) { // we're in good shape
1454 if (cm_getLocalMountPointChange()) { // check for changes
1455 cm_clearLocalMountPointChange(); // clear the changefile
1456 lock_ReleaseMutex(&scp->mx); // this is re-locked in reInitLocalMountPoints
1457 cm_reInitLocalMountPoints(); // start reinit
1458 lock_ObtainMutex(&scp->mx); // now get the lock back
1461 return 1; // no change
1467 if (scp->cbServerp != NULL)
1473 /* need to detect a broken callback that races with our obtaining a callback.
1474 * Need to be able to do this even if we don't know the file ID of the file
1475 * we're breaking the callback on at the time we start the acquisition of the
1476 * callback (as in the case where we are creating a file).
1478 * So, we start by writing down the count of the # of callbacks we've received
1479 * so far, and bumping a global counter of the # of callback granting calls
1480 * outstanding (all done under cm_callbackLock).
1482 * When we're back from the call, we look at all of the callback revokes with
1483 * counter numbers greater than the one we recorded in our caller's structure,
1484 * and replay those that are higher than when we started the call.
1486 * We free all the structures in the queue when the count of the # of outstanding
1487 * callback-granting calls drops to zero.
1489 * We call this function with the scp locked, too, but in its current implementation,
1490 * this knowledge is not used.
1492 void cm_StartCallbackGrantingCall(cm_scache_t *scp, cm_callbackRequest_t *cbrp)
1494 lock_ObtainWrite(&cm_callbackLock);
1495 cbrp->callbackCount = cm_callbackCount;
1496 cm_activeCallbackGrantingCalls++;
1497 cbrp->startTime = osi_Time();
1498 cbrp->serverp = NULL;
1499 lock_ReleaseWrite(&cm_callbackLock);
1502 /* Called at the end of a callback-granting call, to remove the callback
1503 * info from the scache entry, if necessary.
1505 * Called with scp locked, so we can discard the callbacks easily with
1506 * this locking hierarchy.
1508 void cm_EndCallbackGrantingCall(cm_scache_t *scp, cm_callbackRequest_t *cbrp,
1509 AFSCallBack *cbp, long flags)
1511 cm_racingRevokes_t *revp; /* where we are */
1512 cm_racingRevokes_t *nrevp; /* where we'll be next */
1514 cm_server_t * serverp = 0;
1517 lock_ObtainWrite(&cm_callbackLock);
1518 if (flags & CM_CALLBACK_MAINTAINCOUNT) {
1519 osi_assert(cm_activeCallbackGrantingCalls > 0);
1522 osi_assert(cm_activeCallbackGrantingCalls-- > 0);
1524 if (cm_activeCallbackGrantingCalls == 0)
1529 /* record the callback; we'll clear it below if we really lose it */
1532 if (scp->cbServerp != cbrp->serverp) {
1533 serverp = scp->cbServerp;
1535 cm_GetServer(cbrp->serverp);
1536 scp->cbServerp = cbrp->serverp;
1539 serverp = cbrp->serverp;
1541 scp->cbExpires = cbrp->startTime + cbp->ExpirationTime;
1544 serverp = cbrp->serverp;
1547 cbrp->serverp = NULL;
1550 /* a callback was actually revoked during our granting call, so
1551 * run down the list of revoked fids, looking for ours.
1552 * If activeCallbackGrantingCalls is zero, free the elements, too.
1554 * May need to go through entire list just to do the freeing.
1556 for (revp = cm_racingRevokesp; revp; revp = nrevp) {
1557 nrevp = (cm_racingRevokes_t *) osi_QNext(&revp->q);
1558 /* if this callback came in later than when we started the
1559 * callback-granting call, and if this fid is the right fid,
1560 * then clear the callback.
1562 if (scp && cbrp && cbrp->callbackCount != cm_callbackCount
1563 && revp->callbackCount > cbrp->callbackCount
1564 && (( scp->fid.volume == revp->fid.volume &&
1565 scp->fid.vnode == revp->fid.vnode &&
1566 scp->fid.unique == revp->fid.unique)
1568 ((revp->flags & CM_RACINGFLAG_CANCELVOL) &&
1569 scp->fid.volume == revp->fid.volume)
1571 (revp->flags & CM_RACINGFLAG_CANCELALL))) {
1572 /* this one matches */
1574 "Racing revoke scp 0x%x old cbc %d rev cbc %d cur cbc %d",
1576 cbrp->callbackCount, revp->callbackCount,
1584 /* if we freed the list, zap the pointer to it */
1586 cm_racingRevokesp = NULL;
1588 lock_ReleaseWrite(&cm_callbackLock);
1591 cm_DiscardSCache(scp);
1592 lock_ReleaseMutex(&scp->mx);
1593 cm_CallbackNotifyChange(scp);
1594 lock_ObtainMutex(&scp->mx);
1598 lock_ObtainWrite(&cm_serverLock);
1599 cm_FreeServer(serverp);
1600 lock_ReleaseWrite(&cm_serverLock);
1604 /* if flags is 1, we want to force the code to make one call, anyway.
1605 * called with locked scp; returns with same.
1607 long cm_GetCallback(cm_scache_t *scp, struct cm_user *userp,
1608 struct cm_req *reqp, long flags)
1612 AFSFetchStatus afsStatus;
1614 AFSCallBack callback;
1616 cm_callbackRequest_t cbr;
1620 struct rx_connection * callp;
1622 osi_Log4(afsd_logp, "GetCallback scp 0x%x cell %d vol %d flags %lX",
1623 scp, scp->fid.cell, scp->fid.volume, flags);
1625 #ifdef AFS_FREELANCE_CLIENT
1626 // The case where a callback is needed on /afs is handled
1627 // specially. We need to fetch the status by calling
1628 // cm_MergeStatus and mark that cm_fakeDirCallback is 2
1629 if (cm_freelanceEnabled) {
1630 if (scp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
1631 scp->fid.volume==AFS_FAKE_ROOT_VOL_ID &&
1632 scp->fid.unique==0x1 &&
1633 scp->fid.vnode==0x1) {
1635 // Start by indicating that we're in the process
1636 // of fetching the callback
1637 lock_ObtainMutex(&cm_Freelance_Lock);
1638 osi_Log0(afsd_logp,"cm_getGetCallback fakeGettingCallback=1");
1639 cm_fakeGettingCallback = 1;
1640 lock_ReleaseMutex(&cm_Freelance_Lock);
1642 // Fetch the status info
1643 cm_MergeStatus(scp, &afsStatus, &volSync, userp, 0);
1645 // Indicate that the callback is not done
1646 lock_ObtainMutex(&cm_Freelance_Lock);
1647 osi_Log0(afsd_logp,"cm_getGetCallback fakeDirCallback=2");
1648 cm_fakeDirCallback = 2;
1650 // Indicate that we're no longer fetching the callback
1651 osi_Log0(afsd_logp,"cm_getGetCallback fakeGettingCallback=0");
1652 cm_fakeGettingCallback = 0;
1653 lock_ReleaseMutex(&cm_Freelance_Lock);
1658 if (scp->fid.cell==AFS_FAKE_ROOT_CELL_ID && scp->fid.volume==AFS_FAKE_ROOT_VOL_ID) {
1659 osi_Log0(afsd_logp,"cm_getcallback should NEVER EVER get here... ");
1662 #endif /* AFS_FREELANCE_CLIENT */
1664 mustCall = (flags & 1);
1665 cm_AFSFidFromFid(&tfid, &scp->fid);
1667 if (!mustCall && cm_HaveCallback(scp)) {
1668 osi_Log3(afsd_logp, "GetCallback Complete scp 0x%x cell %d vol %d",
1669 scp, scp->fid.cell, scp->fid.volume);
1673 /* turn off mustCall, since it has now forced us past the check above */
1676 /* otherwise, we have to make an RPC to get the status */
1677 sflags = CM_SCACHESYNC_FETCHSTATUS | CM_SCACHESYNC_GETCALLBACK;
1678 cm_SyncOp(scp, NULL, NULL, NULL, 0, sflags);
1679 cm_StartCallbackGrantingCall(scp, &cbr);
1681 lock_ReleaseMutex(&scp->mx);
1683 /* now make the RPC */
1684 osi_Log4(afsd_logp, "CALL FetchStatus scp 0x%x cell %d vol %d uniq %d",
1685 (long) scp, scp->fid.cell, scp->fid.volume, scp->fid.unique);
1687 code = cm_Conn(&sfid, userp, reqp, &connp);
1691 callp = cm_GetRxConn(connp);
1692 code = RXAFS_FetchStatus(callp, &tfid,
1693 &afsStatus, &callback, &volSync);
1694 rx_PutConnection(callp);
1696 } while (cm_Analyze(connp, userp, reqp, &sfid, &volSync, NULL,
1698 code = cm_MapRPCError(code, reqp);
1700 osi_Log4(afsd_logp, "CALL FetchStatus FAILURE code 0x%x scp 0x%x cell %d vol %d",
1701 code, (long) scp, scp->fid.cell, scp->fid.volume);
1703 osi_Log4(afsd_logp, "CALL FetchStatus SUCCESS scp 0x%x cell %d vol %d uniq %d",
1704 (long) scp, scp->fid.cell, scp->fid.volume, scp->fid.unique);
1706 lock_ObtainMutex(&scp->mx);
1708 cm_EndCallbackGrantingCall(scp, &cbr, &callback, 0);
1709 cm_MergeStatus(scp, &afsStatus, &volSync, userp, 0);
1711 cm_EndCallbackGrantingCall(NULL, &cbr, NULL, 0);
1713 cm_SyncOpDone(scp, NULL, sflags);
1715 /* now check to see if we got an error */
1717 osi_Log2(afsd_logp, "GetCallback Failed code 0x%x scp 0x%x -->",code, scp);
1718 osi_Log4(afsd_logp, " cell %d vol %d vn %d uniq %d",
1719 scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1725 /* called periodically by cm_daemon to shut down use of expired callbacks */
1726 void cm_CheckCBExpiration(void)
1732 osi_Log0(afsd_logp, "CheckCBExpiration");
1735 lock_ObtainWrite(&cm_scacheLock);
1736 for (i=0; i<cm_data.hashTableSize; i++) {
1737 for (scp = cm_data.hashTablep[i]; scp; scp=scp->nextp) {
1738 cm_HoldSCacheNoLock(scp);
1739 if (scp->cbExpires > 0 && (scp->cbServerp == NULL || now > scp->cbExpires)) {
1740 lock_ReleaseWrite(&cm_scacheLock);
1741 osi_Log4(afsd_logp, "Callback Expiration Discarding SCache scp 0x%x vol %u vn %u uniq %u",
1742 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1743 lock_ObtainMutex(&scp->mx);
1744 cm_DiscardSCache(scp);
1745 lock_ReleaseMutex(&scp->mx);
1746 cm_CallbackNotifyChange(scp);
1747 lock_ObtainWrite(&cm_scacheLock);
1749 cm_ReleaseSCacheNoLock(scp);
1752 lock_ReleaseWrite(&cm_scacheLock);
1754 osi_Log0(afsd_logp, "CheckCBExpiration Complete");