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>
26 #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%p 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%p 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%p 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 /* reset the No 64-bit flag on the server */
479 cm_SetServerNo64Bit(tsp, 0);
481 /* we're done with the server structure */
485 MUTEX_EXIT(&callp->lock);
489 /*------------------------------------------------------------------------
490 * EXPORTED SRXAFSCB_Probe
493 * Routine called by the server-side callback RPC interface to
494 * implement ``probing'' the Cache Manager, just making sure it's
498 * rx_call : Ptr to Rx call on which this request came in.
504 * Nothing interesting.
508 *------------------------------------------------------------------------*/
510 SRXAFSCB_Probe(struct rx_call *callp)
512 struct rx_connection *connp;
513 struct rx_peer *peerp;
514 unsigned long host = 0;
515 unsigned short port = 0;
517 MUTEX_ENTER(&callp->lock);
519 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
520 host = rx_HostOf(peerp);
521 port = rx_PortOf(peerp);
524 osi_Log2(afsd_logp, "SRXAFSCB_Probe from host 0x%x port %d",
528 MUTEX_EXIT(&callp->lock);
532 /*------------------------------------------------------------------------
533 * EXPORTED SRXAFSCB_GetLock
536 * Routine called by the server-side callback RPC interface to
537 * implement pulling out the contents of a lock in the lock
541 * a_call : Ptr to Rx call on which this request came in.
542 * a_index : Index of desired lock.
543 * a_result : Ptr to a buffer for the given lock.
546 * 0 if everything went fine,
547 * 1 if we were given a bad index.
550 * Nothing interesting.
554 *------------------------------------------------------------------------*/
555 /* debug interface */
557 extern osi_rwlock_t cm_aclLock;
558 extern osi_rwlock_t buf_globalLock;
559 extern osi_rwlock_t cm_callbackLock;
560 extern osi_rwlock_t cm_cellLock;
561 extern osi_rwlock_t cm_connLock;
562 extern osi_rwlock_t cm_daemonLock;
563 extern osi_rwlock_t cm_dnlcLock;
564 extern osi_rwlock_t cm_scacheLock;
565 extern osi_rwlock_t cm_serverLock;
566 extern osi_rwlock_t cm_userLock;
567 extern osi_rwlock_t cm_utilsLock;
568 extern osi_rwlock_t cm_volumeLock;
569 extern osi_rwlock_t smb_globalLock;
570 extern osi_rwlock_t smb_rctLock;
572 extern osi_mutex_t cm_Freelance_Lock;
573 extern osi_mutex_t cm_bufGetMutex;
574 extern osi_mutex_t cm_Afsdsbmt_Lock;
575 extern osi_mutex_t tokenEventLock;
576 extern osi_mutex_t smb_ListenerLock;
577 extern osi_mutex_t smb_RawBufLock;
578 extern osi_mutex_t smb_Dir_Watch_Lock;
580 #define LOCKTYPE_RW 1
581 #define LOCKTYPE_MUTEX 2
582 static struct _ltable {
587 {"cm_scacheLock", (char*)&cm_scacheLock, LOCKTYPE_RW},
588 {"buf_globalLock", (char*)&buf_globalLock, LOCKTYPE_RW},
589 {"cm_serverLock", (char*)&cm_serverLock, LOCKTYPE_RW},
590 {"cm_callbackLock", (char*)&cm_callbackLock, LOCKTYPE_RW},
591 {"cm_aclLock", (char*)&cm_aclLock, LOCKTYPE_RW},
592 {"cm_cellLock", (char*)&cm_cellLock, LOCKTYPE_RW},
593 {"cm_connLock", (char*)&cm_connLock, LOCKTYPE_RW},
594 {"cm_userLock", (char*)&cm_userLock, LOCKTYPE_RW},
595 {"cm_volumeLock", (char*)&cm_volumeLock, LOCKTYPE_RW},
596 {"cm_daemonLock", (char*)&cm_daemonLock, LOCKTYPE_RW},
597 {"cm_dnlcLock", (char*)&cm_dnlcLock, LOCKTYPE_RW},
598 {"cm_utilsLock", (char*)&cm_utilsLock, LOCKTYPE_RW},
599 {"smb_globalLock", (char*)&smb_globalLock, LOCKTYPE_RW},
600 {"smb_rctLock", (char*)&smb_rctLock, LOCKTYPE_RW},
601 {"cm_Freelance_Lock",(char*)&cm_Freelance_Lock, LOCKTYPE_MUTEX},
602 {"cm_bufGetMutex", (char*)&cm_bufGetMutex, LOCKTYPE_MUTEX},
603 {"cm_Afsdsbmt_Lock", (char*)&cm_Afsdsbmt_Lock, LOCKTYPE_MUTEX},
604 {"tokenEventLock", (char*)&tokenEventLock, LOCKTYPE_MUTEX},
605 {"smb_ListenerLock", (char*)&smb_ListenerLock, LOCKTYPE_MUTEX},
606 {"smb_RawBufLock", (char*)&smb_RawBufLock, LOCKTYPE_MUTEX},
607 {"smb_Dir_Watch_Lock",(char*)&smb_Dir_Watch_Lock, LOCKTYPE_MUTEX}
611 SRXAFSCB_GetLock(struct rx_call *callp, long index, AFSDBLock *lockp)
613 struct _ltable *tl; /*Ptr to lock table entry */
616 int nentries; /*Num entries in table */
617 int code; /*Return code */
618 struct rx_connection *connp;
619 struct rx_peer *peerp;
620 unsigned long host = 0;
621 unsigned short port = 0;
623 MUTEX_ENTER(&callp->lock);
625 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
626 host = rx_HostOf(peerp);
627 port = rx_PortOf(peerp);
630 osi_Log3(afsd_logp, "SRXAFSCB_GetLock(%d) from host 0x%x port %d",
631 index, ntohl(host), ntohs(port));
633 nentries = sizeof(ltable) / sizeof(struct _ltable);
634 if (index < 0 || index >= nentries) {
641 * Found it - copy out its contents.
644 strncpy(lockp->name, tl->name, sizeof(lockp->name));
645 lockp->name[sizeof(lockp->name)-1] = '\0';
646 lockp->lock.waitStates = 0;
647 switch ( tl->type ) {
649 rwp = (osi_rwlock_t *)tl->addr;
650 lockp->lock.exclLocked = rwp->flags;
651 lockp->lock.readersReading = rwp->readers;
652 lockp->lock.numWaiting = rwp->waiters;
655 mtxp = (osi_mutex_t *)tl->addr;
656 lockp->lock.exclLocked = mtxp->flags;
657 lockp->lock.readersReading = 0;
658 lockp->lock.numWaiting = mtxp->waiters;
661 lockp->lock.pid_last_reader = 0;
662 lockp->lock.pid_writer = 0;
663 lockp->lock.src_indicator = 0;
667 MUTEX_EXIT(&callp->lock);
671 /* debug interface */
673 SRXAFSCB_GetCE(struct rx_call *callp, long index, AFSDBCacheEntry *cep)
678 struct rx_connection *connp;
679 struct rx_peer *peerp;
680 unsigned long host = 0;
681 unsigned short port = 0;
683 MUTEX_ENTER(&callp->lock);
685 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
686 host = rx_HostOf(peerp);
687 port = rx_PortOf(peerp);
690 osi_Log2(afsd_logp, "SRXAFSCB_GetCE from host 0x%x port %d",
691 ntohl(host), ntohs(port));
693 lock_ObtainRead(&cm_scacheLock);
694 for (i = 0; i < cm_data.hashTableSize; i++) {
695 for (scp = cm_data.hashTablep[i]; scp; scp = scp->nextp) {
699 } /*Zip through current hash chain */
700 } /*Zip through hash chains */
710 * Copy out the located entry.
712 memset(cep, 0, sizeof(AFSDBCacheEntry));
713 cep->addr = afs_data_pointer_to_int32(scp);
714 cep->cell = scp->fid.cell;
715 cep->netFid.Volume = scp->fid.volume;
716 cep->netFid.Vnode = scp->fid.vnode;
717 cep->netFid.Unique = scp->fid.unique;
718 cep->lock.waitStates = 0;
719 cep->lock.exclLocked = scp->mx.flags;
720 cep->lock.readersReading = 0;
721 cep->lock.numWaiting = scp->mx.waiters;
722 cep->lock.pid_last_reader = 0;
723 cep->lock.pid_writer = 0;
724 cep->lock.src_indicator = 0;
725 cep->Length = scp->length.LowPart;
726 cep->DataVersion = scp->dataVersion;
727 cep->callback = afs_data_pointer_to_int32(scp->cbServerp);
728 cep->cbExpires = scp->cbExpires;
729 cep->refCount = scp->refCount;
730 cep->opens = scp->openReads;
731 cep->writers = scp->openWrites;
732 switch (scp->fileType) {
733 case CM_SCACHETYPE_FILE:
736 case CM_SCACHETYPE_MOUNTPOINT:
739 case CM_SCACHETYPE_DIRECTORY:
740 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
745 case CM_SCACHETYPE_SYMLINK:
748 case CM_SCACHETYPE_DFSLINK:
751 case CM_SCACHETYPE_INVALID:
756 if (scp->flags & CM_SCACHEFLAG_STATD)
758 if (scp->flags & CM_SCACHEFLAG_RO || scp->flags & CM_SCACHEFLAG_PURERO)
760 if (scp->fileType == CM_SCACHETYPE_MOUNTPOINT &&
761 scp->mountPointStringp[0])
763 if (scp->flags & CM_SCACHEFLAG_WAITING)
768 * Return our results.
771 lock_ReleaseRead(&cm_scacheLock);
773 MUTEX_EXIT(&callp->lock);
777 /* debug interface */
779 SRXAFSCB_GetCE64(struct rx_call *callp, long index, AFSDBCacheEntry64 *cep)
784 struct rx_connection *connp;
785 struct rx_peer *peerp;
786 unsigned long host = 0;
787 unsigned short port = 0;
789 MUTEX_ENTER(&callp->lock);
791 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
792 host = rx_HostOf(peerp);
793 port = rx_PortOf(peerp);
796 osi_Log2(afsd_logp, "SRXAFSCB_GetCE64 from host 0x%x port %d",
797 ntohl(host), ntohs(port));
799 lock_ObtainRead(&cm_scacheLock);
800 for (i = 0; i < cm_data.hashTableSize; i++) {
801 for (scp = cm_data.hashTablep[i]; scp; scp = scp->nextp) {
805 } /*Zip through current hash chain */
806 } /*Zip through hash chains */
816 * Copy out the located entry.
818 memset(cep, 0, sizeof(AFSDBCacheEntry64));
819 cep->addr = afs_data_pointer_to_int32(scp);
820 cep->cell = scp->fid.cell;
821 cep->netFid.Volume = scp->fid.volume;
822 cep->netFid.Vnode = scp->fid.vnode;
823 cep->netFid.Unique = scp->fid.unique;
824 cep->lock.waitStates = 0;
825 cep->lock.exclLocked = scp->mx.flags;
826 cep->lock.readersReading = 0;
827 cep->lock.numWaiting = scp->mx.waiters;
828 cep->lock.pid_last_reader = 0;
829 cep->lock.pid_writer = 0;
830 cep->lock.src_indicator = 0;
831 #if !defined(AFS_64BIT_ENV)
832 cep->Length.high = scp->length.HighPart;
833 cep->Length.low = scp->length.LowPart;
835 cep->Length = (afs_int64) scp->length.QuadPart;
837 cep->DataVersion = scp->dataVersion;
838 cep->callback = afs_data_pointer_to_int32(scp->cbServerp);
839 cep->cbExpires = scp->cbExpires;
840 cep->refCount = scp->refCount;
841 cep->opens = scp->openReads;
842 cep->writers = scp->openWrites;
843 switch (scp->fileType) {
844 case CM_SCACHETYPE_FILE:
847 case CM_SCACHETYPE_MOUNTPOINT:
850 case CM_SCACHETYPE_DIRECTORY:
851 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
856 case CM_SCACHETYPE_SYMLINK:
859 case CM_SCACHETYPE_DFSLINK:
862 case CM_SCACHETYPE_INVALID:
867 if (scp->flags & CM_SCACHEFLAG_STATD)
869 if (scp->flags & CM_SCACHEFLAG_RO || scp->flags & CM_SCACHEFLAG_PURERO)
871 if (scp->fileType == CM_SCACHETYPE_MOUNTPOINT &&
872 scp->mountPointStringp[0])
874 if (scp->flags & CM_SCACHEFLAG_WAITING)
879 * Return our results.
882 lock_ReleaseRead(&cm_scacheLock);
884 MUTEX_EXIT(&callp->lock);
888 /* debug interface: not implemented */
890 SRXAFSCB_XStatsVersion(struct rx_call *callp, long *vp)
892 struct rx_connection *connp;
893 struct rx_peer *peerp;
894 unsigned long host = 0;
895 unsigned short port = 0;
897 MUTEX_ENTER(&callp->lock);
899 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
900 host = rx_HostOf(peerp);
901 port = rx_PortOf(peerp);
904 osi_Log2(afsd_logp, "SRXAFSCB_XStatsVersion from host 0x%x port %d - not implemented",
905 ntohl(host), ntohs(port));
908 MUTEX_EXIT(&callp->lock);
912 /* debug interface: not implemented */
914 SRXAFSCB_GetXStats(struct rx_call *callp, long cvn, long coln, long *srvp, long *timep,
915 AFSCB_CollData *datap)
917 struct rx_connection *connp;
918 struct rx_peer *peerp;
919 unsigned long host = 0;
920 unsigned short port = 0;
922 MUTEX_ENTER(&callp->lock);
924 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
925 host = rx_HostOf(peerp);
926 port = rx_PortOf(peerp);
929 osi_Log2(afsd_logp, "SRXAFSCB_GetXStats from host 0x%x port %d - not implemented",
930 ntohl(host), ntohs(port));
932 MUTEX_EXIT(&callp->lock);
937 SRXAFSCB_InitCallBackState2(struct rx_call *callp, struct interfaceAddr* addr)
939 osi_Log0(afsd_logp, "SRXAFSCB_InitCallBackState2 ->");
941 return SRXAFSCB_InitCallBackState(callp);
944 /* debug interface */
946 SRXAFSCB_WhoAreYou(struct rx_call *callp, struct interfaceAddr* addr)
949 int cm_noIPAddr; /* number of client network interfaces */
950 int cm_IPAddr[CM_MAXINTERFACE_ADDR]; /* client's IP address in host order */
951 int cm_SubnetMask[CM_MAXINTERFACE_ADDR];/* client's subnet mask in host order*/
952 int cm_NetMtu[CM_MAXINTERFACE_ADDR]; /* client's MTU sizes */
953 int cm_NetFlags[CM_MAXINTERFACE_ADDR]; /* network flags */
955 struct rx_connection *connp;
956 struct rx_peer *peerp;
957 unsigned long host = 0;
958 unsigned short port = 0;
960 MUTEX_ENTER(&callp->lock);
962 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
963 host = rx_HostOf(peerp);
964 port = rx_PortOf(peerp);
967 /* get network related info */
968 cm_noIPAddr = CM_MAXINTERFACE_ADDR;
969 code = syscfg_GetIFInfo(&cm_noIPAddr,
970 cm_IPAddr, cm_SubnetMask,
971 cm_NetMtu, cm_NetFlags);
973 /* return all network interface addresses */
974 osi_Log2(afsd_logp, "SRXAFSCB_WhoAreYou from host 0x%x port %d",
978 addr->numberOfInterfaces = cm_noIPAddr;
979 addr->uuid = cm_data.Uuid;
980 for ( i=0; i < cm_noIPAddr; i++ ) {
981 addr->addr_in[i] = cm_IPAddr[i];
982 addr->subnetmask[i] = cm_SubnetMask[i];
983 addr->mtu[i] = (rx_mtu == -1 || (rx_mtu != -1 && cm_NetMtu[i] < rx_mtu)) ?
984 cm_NetMtu[i] : rx_mtu;
987 MUTEX_EXIT(&callp->lock);
992 SRXAFSCB_InitCallBackState3(struct rx_call *callp, afsUUID* serverUuid)
996 if (UuidToString((UUID *)serverUuid, &p) == RPC_S_OK) {
997 osi_Log1(afsd_logp, "SRXAFSCB_InitCallBackState3 %s ->",p);
1000 osi_Log0(afsd_logp, "SRXAFSCB_InitCallBackState3 - no server Uuid ->");
1002 return SRXAFSCB_InitCallBackState(callp);
1005 /* debug interface */
1007 SRXAFSCB_ProbeUuid(struct rx_call *callp, afsUUID* clientUuid)
1009 struct rx_connection *connp;
1010 struct rx_peer *peerp;
1011 unsigned long host = 0;
1012 unsigned short port = 0;
1016 MUTEX_ENTER(&callp->lock);
1018 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1019 host = rx_HostOf(peerp);
1020 port = rx_PortOf(peerp);
1023 if ( !afs_uuid_equal(&cm_data.Uuid, clientUuid) ) {
1024 UuidToString((UUID *)&cm_data.Uuid, &p);
1025 UuidToString((UUID *)clientUuid, &q);
1026 osi_Log4(afsd_logp, "SRXAFSCB_ProbeUuid %s != %s from host 0x%x port %d",
1027 osi_LogSaveString(afsd_logp,p),
1028 osi_LogSaveString(afsd_logp,q),
1034 code = 1; /* failure */
1036 osi_Log2(afsd_logp, "SRXAFSCB_ProbeUuid (success) from host 0x%x port %d",
1040 MUTEX_EXIT(&callp->lock);
1044 /* debug interface */
1046 SRXAFSCB_GetCellByNum(struct rx_call *callp, afs_int32 a_cellnum,
1047 char **a_name, serverList *a_hosts)
1051 cm_serverRef_t * serverRefp;
1052 struct rx_connection *connp;
1053 struct rx_peer *peerp;
1054 unsigned long host = 0;
1055 unsigned short port = 0;
1057 MUTEX_ENTER(&callp->lock);
1059 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1060 host = rx_HostOf(peerp);
1061 port = rx_PortOf(peerp);
1064 osi_Log3(afsd_logp, "SRXAFSCB_GetCellByNum(%d) from host 0x%x port %d",
1065 a_cellnum, ntohl(host), ntohs(port));
1067 a_hosts->serverList_val = 0;
1068 a_hosts->serverList_len = 0;
1070 cellp = cm_FindCellByID(a_cellnum);
1072 *a_name = strdup("");
1073 MUTEX_EXIT(&callp->lock);
1077 lock_ObtainRead(&cm_serverLock);
1078 *a_name = strdup(cellp->name);
1080 for ( sn = 0, serverRefp = cellp->vlServersp;
1081 sn < AFSMAXCELLHOSTS && serverRefp;
1082 sn++, serverRefp = serverRefp->next);
1084 a_hosts->serverList_len = sn;
1085 a_hosts->serverList_val = (afs_int32 *)osi_Alloc(sn * sizeof(afs_int32));
1087 for ( sn = 0, serverRefp = cellp->vlServersp;
1088 sn < AFSMAXCELLHOSTS && serverRefp;
1089 sn++, serverRefp = serverRefp->next)
1091 a_hosts->serverList_val[sn] = ntohl(serverRefp->server->addr.sin_addr.s_addr);
1094 lock_ReleaseRead(&cm_serverLock);
1095 MUTEX_EXIT(&callp->lock);
1099 /* debug interface */
1101 SRXAFSCB_TellMeAboutYourself( struct rx_call *callp,
1102 struct interfaceAddr *addr,
1103 Capabilities * capabilities)
1106 afs_int32 *dataBuffP;
1107 afs_int32 dataBytes;
1108 int cm_noIPAddr; /* number of client network interfaces */
1109 int cm_IPAddr[CM_MAXINTERFACE_ADDR]; /* client's IP address in host order */
1110 int cm_SubnetMask[CM_MAXINTERFACE_ADDR];/* client's subnet mask in host order*/
1111 int cm_NetMtu[CM_MAXINTERFACE_ADDR]; /* client's MTU sizes */
1112 int cm_NetFlags[CM_MAXINTERFACE_ADDR]; /* network flags */
1114 struct rx_connection *connp;
1115 struct rx_peer *peerp;
1116 unsigned long host = 0;
1117 unsigned short port = 0;
1119 MUTEX_ENTER(&callp->lock);
1121 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1122 host = rx_HostOf(peerp);
1123 port = rx_PortOf(peerp);
1126 /* get network related info */
1127 cm_noIPAddr = CM_MAXINTERFACE_ADDR;
1128 code = syscfg_GetIFInfo(&cm_noIPAddr,
1129 cm_IPAddr, cm_SubnetMask,
1130 cm_NetMtu, cm_NetFlags);
1132 osi_Log2(afsd_logp, "SRXAFSCB_TellMeAboutYourself from host 0x%x port %d",
1136 /* return all network interface addresses */
1137 addr->numberOfInterfaces = cm_noIPAddr;
1138 addr->uuid = cm_data.Uuid;
1139 for ( i=0; i < cm_noIPAddr; i++ ) {
1140 addr->addr_in[i] = cm_IPAddr[i];
1141 addr->subnetmask[i] = cm_SubnetMask[i];
1142 addr->mtu[i] = (rx_mtu == -1 || (rx_mtu != -1 && cm_NetMtu[i] < rx_mtu)) ?
1143 cm_NetMtu[i] : rx_mtu;
1146 dataBytes = 1 * sizeof(afs_int32);
1147 dataBuffP = (afs_int32 *) osi_Alloc(dataBytes);
1148 dataBuffP[0] = CLIENT_CAPABILITY_ERRORTRANS;
1149 capabilities->Capabilities_len = dataBytes / sizeof(afs_int32);
1150 capabilities->Capabilities_val = dataBuffP;
1152 MUTEX_EXIT(&callp->lock);
1156 /*------------------------------------------------------------------------
1157 * EXPORTED SRXAFSCB_GetServerPrefs
1160 * Routine to list server preferences used by this client.
1163 * a_call : Ptr to Rx call on which this request came in.
1164 * a_index : Input server index
1165 * a_srvr_addr : Output server address (0xffffffff on last server)
1166 * a_srvr_rank : Output server rank
1172 * Nothing interesting.
1176 *------------------------------------------------------------------------*/
1178 int SRXAFSCB_GetServerPrefs(
1179 struct rx_call *callp,
1181 afs_int32 *a_srvr_addr,
1182 afs_int32 *a_srvr_rank)
1184 struct rx_connection *connp;
1185 struct rx_peer *peerp;
1186 unsigned long host = 0;
1187 unsigned short port = 0;
1189 MUTEX_ENTER(&callp->lock);
1191 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1192 host = rx_HostOf(peerp);
1193 port = rx_PortOf(peerp);
1196 osi_Log2(afsd_logp, "SRXAFSCB_GetServerPrefs from host 0x%x port %d - not implemented",
1200 *a_srvr_addr = 0xffffffff;
1201 *a_srvr_rank = 0xffffffff;
1203 MUTEX_EXIT(&callp->lock);
1207 /*------------------------------------------------------------------------
1208 * EXPORTED SRXAFSCB_GetCellServDB
1211 * Routine to list cells configured for this client
1214 * a_call : Ptr to Rx call on which this request came in.
1215 * a_index : Input cell index
1216 * a_name : Output cell name ("" on last cell)
1217 * a_hosts : Output cell database servers
1223 * Nothing interesting.
1227 *------------------------------------------------------------------------*/
1229 int SRXAFSCB_GetCellServDB(struct rx_call *callp, afs_int32 index, char **a_name,
1230 serverList *a_hosts)
1233 struct rx_connection *connp;
1234 struct rx_peer *peerp;
1235 unsigned long host = 0;
1236 unsigned short port = 0;
1238 MUTEX_ENTER(&callp->lock);
1240 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1241 host = rx_HostOf(peerp);
1242 port = rx_PortOf(peerp);
1245 osi_Log2(afsd_logp, "SRXAFSCB_GetCellServDB from host 0x%x port %d - not implemented",
1246 ntohl(host), ntohs(port));
1248 t_name = (char *)malloc(AFSNAMEMAX);
1251 a_hosts->serverList_len = 0;
1253 MUTEX_EXIT(&callp->lock);
1257 /*------------------------------------------------------------------------
1258 * EXPORTED SRXAFSCB_GetLocalCell
1261 * Routine to return name of client's local cell
1264 * a_call : Ptr to Rx call on which this request came in.
1265 * a_name : Output cell name
1271 * Nothing interesting.
1275 *------------------------------------------------------------------------*/
1277 int SRXAFSCB_GetLocalCell(struct rx_call *callp, char **a_name)
1280 struct rx_connection *connp;
1281 struct rx_peer *peerp;
1282 unsigned long host = 0;
1283 unsigned short port = 0;
1285 MUTEX_ENTER(&callp->lock);
1287 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1288 host = rx_HostOf(peerp);
1289 port = rx_PortOf(peerp);
1292 osi_Log2(afsd_logp, "SRXAFSCB_GetLocalCell from host 0x%x port %d",
1293 ntohl(host), ntohs(port));
1295 if (cm_data.rootCellp) {
1296 t_name = (char *)malloc(strlen(cm_data.rootCellp->name)+1);
1297 strcpy(t_name, cm_data.rootCellp->name);
1299 t_name = (char *)malloc(1);
1304 MUTEX_EXIT(&callp->lock);
1310 * afs_MarshallCacheConfig - marshall client cache configuration
1314 * IN callerVersion - the rpc stat version of the caller.
1316 * IN config - client cache configuration.
1318 * OUT ptr - buffer where configuration is marshalled.
1324 static void afs_MarshallCacheConfig(
1325 afs_uint32 callerVersion,
1326 cm_initparams_v1 *config,
1330 * We currently only support version 1.
1332 *(ptr++) = config->nChunkFiles;
1333 *(ptr++) = config->nStatCaches;
1334 *(ptr++) = config->nDataCaches;
1335 *(ptr++) = config->nVolumeCaches;
1336 *(ptr++) = config->firstChunkSize;
1337 *(ptr++) = config->otherChunkSize;
1338 *(ptr++) = config->cacheSize;
1339 *(ptr++) = config->setTime;
1340 *(ptr++) = config->memCache;
1345 /*------------------------------------------------------------------------
1346 * EXPORTED SRXAFSCB_GetCacheConfig
1349 * Routine to return parameters used to initialize client cache.
1350 * Client may request any format version. Server may not return
1351 * format version greater than version requested by client.
1354 * a_call: Ptr to Rx call on which this request came in.
1355 * callerVersion: Data format version desired by the client.
1356 * serverVersion: Data format version of output data.
1357 * configCount: Number bytes allocated for output data.
1358 * config: Client cache configuration.
1364 * Nothing interesting.
1368 *------------------------------------------------------------------------*/
1370 int SRXAFSCB_GetCacheConfig(struct rx_call *callp,
1371 afs_uint32 callerVersion,
1372 afs_uint32 *serverVersion,
1373 afs_uint32 *configCount,
1374 cacheConfig *config)
1376 afs_uint32 *t_config;
1378 extern cm_initparams_v1 cm_initParams;
1379 struct rx_connection *connp;
1380 struct rx_peer *peerp;
1381 unsigned long host = 0;
1382 unsigned short port = 0;
1384 MUTEX_ENTER(&callp->lock);
1386 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1387 host = rx_HostOf(peerp);
1388 port = rx_PortOf(peerp);
1391 osi_Log2(afsd_logp, "SRXAFSCB_GetCacheConfig from host 0x%x port %d - version 1 only",
1392 ntohl(host), ntohs(port));
1395 * Currently only support version 1
1397 allocsize = sizeof(cm_initparams_v1);
1398 t_config = (afs_uint32 *)malloc(allocsize);
1400 afs_MarshallCacheConfig(callerVersion, &cm_initParams, t_config);
1402 *serverVersion = AFS_CLIENT_RETRIEVAL_FIRST_EDITION;
1405 #define SIZE_MAX UINT_MAX
1407 osi_assert(allocsize < SIZE_MAX);
1409 *configCount = (afs_uint32)allocsize;
1410 config->cacheConfig_val = t_config;
1411 config->cacheConfig_len = (*configCount)/sizeof(afs_uint32);
1413 MUTEX_EXIT(&callp->lock);
1417 /* called by afsd without any locks to initialize this module */
1418 void cm_InitCallback(void)
1420 lock_InitializeRWLock(&cm_callbackLock, "cm_callbackLock");
1421 cm_activeCallbackGrantingCalls = 0;
1424 /* called with locked scp; tells us whether we've got a callback.
1425 * Expirations are checked by a background daemon so as to make
1426 * this function as inexpensive as possible
1428 int cm_HaveCallback(cm_scache_t *scp)
1430 #ifdef AFS_FREELANCE_CLIENT
1431 // yj: we handle callbacks specially for callbacks on the root directory
1432 // Since it's local, we almost always say that we have callback on it
1433 // The only time we send back a 0 is if we're need to initialize or
1434 // reinitialize the fake directory
1436 // There are 2 state variables cm_fakeGettingCallback and cm_fakeDirCallback
1437 // cm_fakeGettingCallback is 1 if we're in the process of initialization and
1438 // hence should return false. it's 0 otherwise
1439 // cm_fakeDirCallback is 0 if we haven't loaded the fake directory, it's 1
1440 // if the fake directory is loaded and this is the first time cm_HaveCallback
1441 // is called since then. We return false in this case to allow cm_GetCallback
1442 // to be called because cm_GetCallback has some initialization work to do.
1443 // If cm_fakeDirCallback is 2, then it means that the fake directory is in
1444 // good shape and we simply return true, provided no change is detected.
1447 if (cm_freelanceEnabled &&
1448 scp->fid.cell==AFS_FAKE_ROOT_CELL_ID && scp->fid.volume==AFS_FAKE_ROOT_VOL_ID) {
1449 /* if it's something on /afs */
1450 if (!(scp->fid.vnode==0x1 && scp->fid.unique==0x1)) {
1451 /* if it's not root.afs */
1455 lock_ObtainMutex(&cm_Freelance_Lock);
1456 fdc = cm_fakeDirCallback;
1457 fgc = cm_fakeGettingCallback;
1458 lock_ReleaseMutex(&cm_Freelance_Lock);
1460 if (fdc==1) { // first call since init
1462 } else if (fdc==2 && !fgc) { // we're in good shape
1463 if (cm_getLocalMountPointChange()) { // check for changes
1464 cm_clearLocalMountPointChange(); // clear the changefile
1465 lock_ReleaseMutex(&scp->mx); // this is re-locked in reInitLocalMountPoints
1466 cm_reInitLocalMountPoints(); // start reinit
1467 lock_ObtainMutex(&scp->mx); // now get the lock back
1470 return 1; // no change
1476 if (scp->cbServerp != NULL)
1482 /* need to detect a broken callback that races with our obtaining a callback.
1483 * Need to be able to do this even if we don't know the file ID of the file
1484 * we're breaking the callback on at the time we start the acquisition of the
1485 * callback (as in the case where we are creating a file).
1487 * So, we start by writing down the count of the # of callbacks we've received
1488 * so far, and bumping a global counter of the # of callback granting calls
1489 * outstanding (all done under cm_callbackLock).
1491 * When we're back from the call, we look at all of the callback revokes with
1492 * counter numbers greater than the one we recorded in our caller's structure,
1493 * and replay those that are higher than when we started the call.
1495 * We free all the structures in the queue when the count of the # of outstanding
1496 * callback-granting calls drops to zero.
1498 * We call this function with the scp locked, too, but in its current implementation,
1499 * this knowledge is not used.
1501 void cm_StartCallbackGrantingCall(cm_scache_t *scp, cm_callbackRequest_t *cbrp)
1503 lock_ObtainWrite(&cm_callbackLock);
1504 cbrp->callbackCount = cm_callbackCount;
1505 cm_activeCallbackGrantingCalls++;
1506 cbrp->startTime = osi_Time();
1507 cbrp->serverp = NULL;
1508 lock_ReleaseWrite(&cm_callbackLock);
1511 /* Called at the end of a callback-granting call, to remove the callback
1512 * info from the scache entry, if necessary.
1514 * Called with scp locked, so we can discard the callbacks easily with
1515 * this locking hierarchy.
1517 void cm_EndCallbackGrantingCall(cm_scache_t *scp, cm_callbackRequest_t *cbrp,
1518 AFSCallBack *cbp, long flags)
1520 cm_racingRevokes_t *revp; /* where we are */
1521 cm_racingRevokes_t *nrevp; /* where we'll be next */
1523 cm_server_t * serverp = 0;
1526 lock_ObtainWrite(&cm_callbackLock);
1527 if (flags & CM_CALLBACK_MAINTAINCOUNT) {
1528 osi_assert(cm_activeCallbackGrantingCalls > 0);
1531 osi_assert(cm_activeCallbackGrantingCalls-- > 0);
1533 if (cm_activeCallbackGrantingCalls == 0)
1538 /* record the callback; we'll clear it below if we really lose it */
1541 if (scp->cbServerp != cbrp->serverp) {
1542 serverp = scp->cbServerp;
1544 cm_GetServer(cbrp->serverp);
1545 scp->cbServerp = cbrp->serverp;
1548 serverp = cbrp->serverp;
1550 scp->cbExpires = cbrp->startTime + cbp->ExpirationTime;
1553 serverp = cbrp->serverp;
1556 cbrp->serverp = NULL;
1559 /* a callback was actually revoked during our granting call, so
1560 * run down the list of revoked fids, looking for ours.
1561 * If activeCallbackGrantingCalls is zero, free the elements, too.
1563 * May need to go through entire list just to do the freeing.
1565 for (revp = cm_racingRevokesp; revp; revp = nrevp) {
1566 nrevp = (cm_racingRevokes_t *) osi_QNext(&revp->q);
1567 /* if this callback came in later than when we started the
1568 * callback-granting call, and if this fid is the right fid,
1569 * then clear the callback.
1571 if (scp && cbrp && cbrp->callbackCount != cm_callbackCount
1572 && revp->callbackCount > cbrp->callbackCount
1573 && (( scp->fid.volume == revp->fid.volume &&
1574 scp->fid.vnode == revp->fid.vnode &&
1575 scp->fid.unique == revp->fid.unique)
1577 ((revp->flags & CM_RACINGFLAG_CANCELVOL) &&
1578 scp->fid.volume == revp->fid.volume)
1580 (revp->flags & CM_RACINGFLAG_CANCELALL))) {
1581 /* this one matches */
1583 "Racing revoke scp 0x%p old cbc %d rev cbc %d cur cbc %d",
1585 cbrp->callbackCount, revp->callbackCount,
1593 /* if we freed the list, zap the pointer to it */
1595 cm_racingRevokesp = NULL;
1597 lock_ReleaseWrite(&cm_callbackLock);
1600 cm_DiscardSCache(scp);
1601 lock_ReleaseMutex(&scp->mx);
1602 cm_CallbackNotifyChange(scp);
1603 lock_ObtainMutex(&scp->mx);
1607 lock_ObtainWrite(&cm_serverLock);
1608 cm_FreeServer(serverp);
1609 lock_ReleaseWrite(&cm_serverLock);
1613 /* if flags is 1, we want to force the code to make one call, anyway.
1614 * called with locked scp; returns with same.
1616 long cm_GetCallback(cm_scache_t *scp, struct cm_user *userp,
1617 struct cm_req *reqp, long flags)
1621 AFSFetchStatus afsStatus;
1623 AFSCallBack callback;
1625 cm_callbackRequest_t cbr;
1629 struct rx_connection * callp;
1631 osi_Log4(afsd_logp, "GetCallback scp 0x%p cell %d vol %d flags %lX",
1632 scp, scp->fid.cell, scp->fid.volume, flags);
1634 #ifdef AFS_FREELANCE_CLIENT
1635 // The case where a callback is needed on /afs is handled
1636 // specially. We need to fetch the status by calling
1637 // cm_MergeStatus and mark that cm_fakeDirCallback is 2
1638 if (cm_freelanceEnabled) {
1639 if (scp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
1640 scp->fid.volume==AFS_FAKE_ROOT_VOL_ID &&
1641 scp->fid.unique==0x1 &&
1642 scp->fid.vnode==0x1) {
1644 // Start by indicating that we're in the process
1645 // of fetching the callback
1646 lock_ObtainMutex(&cm_Freelance_Lock);
1647 osi_Log0(afsd_logp,"cm_getGetCallback fakeGettingCallback=1");
1648 cm_fakeGettingCallback = 1;
1649 lock_ReleaseMutex(&cm_Freelance_Lock);
1651 // Fetch the status info
1652 cm_MergeStatus(scp, &afsStatus, &volSync, userp, 0);
1654 // Indicate that the callback is not done
1655 lock_ObtainMutex(&cm_Freelance_Lock);
1656 osi_Log0(afsd_logp,"cm_getGetCallback fakeDirCallback=2");
1657 cm_fakeDirCallback = 2;
1659 // Indicate that we're no longer fetching the callback
1660 osi_Log0(afsd_logp,"cm_getGetCallback fakeGettingCallback=0");
1661 cm_fakeGettingCallback = 0;
1662 lock_ReleaseMutex(&cm_Freelance_Lock);
1667 if (scp->fid.cell==AFS_FAKE_ROOT_CELL_ID && scp->fid.volume==AFS_FAKE_ROOT_VOL_ID) {
1668 osi_Log0(afsd_logp,"cm_getcallback should NEVER EVER get here... ");
1671 #endif /* AFS_FREELANCE_CLIENT */
1673 mustCall = (flags & 1);
1674 cm_AFSFidFromFid(&tfid, &scp->fid);
1676 if (!mustCall && cm_HaveCallback(scp)) {
1677 osi_Log3(afsd_logp, "GetCallback Complete scp 0x%p cell %d vol %d",
1678 scp, scp->fid.cell, scp->fid.volume);
1682 /* turn off mustCall, since it has now forced us past the check above */
1685 /* otherwise, we have to make an RPC to get the status */
1686 sflags = CM_SCACHESYNC_FETCHSTATUS | CM_SCACHESYNC_GETCALLBACK;
1687 cm_SyncOp(scp, NULL, userp, reqp, 0, sflags);
1688 cm_StartCallbackGrantingCall(scp, &cbr);
1690 lock_ReleaseMutex(&scp->mx);
1692 /* now make the RPC */
1693 osi_Log4(afsd_logp, "CALL FetchStatus scp 0x%p vol %u vn %u uniq %u",
1694 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1696 code = cm_Conn(&sfid, userp, reqp, &connp);
1700 callp = cm_GetRxConn(connp);
1701 code = RXAFS_FetchStatus(callp, &tfid,
1702 &afsStatus, &callback, &volSync);
1703 rx_PutConnection(callp);
1705 } while (cm_Analyze(connp, userp, reqp, &sfid, &volSync, NULL,
1707 code = cm_MapRPCError(code, reqp);
1709 osi_Log4(afsd_logp, "CALL FetchStatus FAILURE code 0x%x scp 0x%p vol %u vn %u",
1710 code, scp, scp->fid.volume, scp->fid.vnode);
1712 osi_Log4(afsd_logp, "CALL FetchStatus SUCCESS scp 0x%p vol %u vn %u uniq %u",
1713 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1715 lock_ObtainMutex(&scp->mx);
1717 cm_EndCallbackGrantingCall(scp, &cbr, &callback, 0);
1718 cm_MergeStatus(scp, &afsStatus, &volSync, userp, 0);
1720 cm_EndCallbackGrantingCall(NULL, &cbr, NULL, 0);
1722 cm_SyncOpDone(scp, NULL, sflags);
1724 /* now check to see if we got an error */
1726 osi_Log2(afsd_logp, "GetCallback Failed code 0x%x scp 0x%p -->",code, scp);
1727 osi_Log4(afsd_logp, " cell %u vol %u vn %u uniq %u",
1728 scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1734 /* called periodically by cm_daemon to shut down use of expired callbacks */
1735 void cm_CheckCBExpiration(void)
1741 osi_Log0(afsd_logp, "CheckCBExpiration");
1744 lock_ObtainWrite(&cm_scacheLock);
1745 for (i=0; i<cm_data.hashTableSize; i++) {
1746 for (scp = cm_data.hashTablep[i]; scp; scp=scp->nextp) {
1747 cm_HoldSCacheNoLock(scp);
1748 if (scp->cbExpires > 0 && (scp->cbServerp == NULL || now > scp->cbExpires)) {
1749 lock_ReleaseWrite(&cm_scacheLock);
1750 osi_Log4(afsd_logp, "Callback Expiration Discarding SCache scp 0x%p vol %u vn %u uniq %u",
1751 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1752 lock_ObtainMutex(&scp->mx);
1753 cm_DiscardSCache(scp);
1754 lock_ReleaseMutex(&scp->mx);
1755 cm_CallbackNotifyChange(scp);
1756 lock_ObtainWrite(&cm_scacheLock);
1758 cm_ReleaseSCacheNoLock(scp);
1761 lock_ReleaseWrite(&cm_scacheLock);
1763 osi_Log0(afsd_logp, "CheckCBExpiration Complete");