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 afs_int32 cm_OfflineROIsValid = 0;
39 #ifdef AFS_FREELANCE_CLIENT
40 extern osi_mutex_t cm_Freelance_Lock;
43 /* count of # of callback breaking messages received by this CM so far. We use
44 * this count in determining whether there have been any callback breaks that
45 * apply to a call that returned a new callback. If the counter doesn't
46 * increase during a call, then we know that no callbacks were broken during
47 * that call, and thus that the callback that was just returned is still valid.
49 long cm_callbackCount;
51 /* count of number of RPCs potentially returning a callback executing now.
52 * When this counter hits zero, we can clear out the racing revokes list, since
53 * at that time, we know that none of the just-executed callback revokes will
54 * apply to any future call that returns a callback (since the latter hasn't
55 * even started execution yet).
57 long cm_activeCallbackGrantingCalls;
59 /* list of callbacks that have been broken recently. If a call returning a
60 * callback is executing and a callback revoke runs immediately after it at the
61 * server, the revoke may end up being processed before the response to the
62 * original callback granting call. We detect this by keeping a list of
63 * callback revokes that have been received since we *started* the callback
64 * granting call, and discarding any callbacks received for the same file ID,
65 * even if the callback revoke was received before the callback grant.
67 cm_racingRevokes_t *cm_racingRevokesp;
69 /* record a (potentially) racing revoke for this file ID; null means for all
70 * file IDs, and is used by InitCallBackState.
72 * The cancelFlags describe whether we're just discarding callbacks for the same
73 * file ID, the same volume, or all from the same server.
75 * Called with no locks held.
77 void cm_RecordRacingRevoke(cm_fid_t *fidp, long cancelFlags)
79 cm_racingRevokes_t *rp;
81 lock_ObtainWrite(&cm_callbackLock);
83 osi_Log3(afsd_logp, "RecordRacingRevoke Volume %d Flags %lX activeCalls %d",
84 fidp ? fidp->volume : 0, cancelFlags, cm_activeCallbackGrantingCalls);
86 if (cm_activeCallbackGrantingCalls > 0) {
87 rp = malloc(sizeof(*rp));
88 memset(rp, 0, sizeof(*rp));
89 osi_QAdd((osi_queue_t **) &cm_racingRevokesp, &rp->q);
90 rp->flags |= (cancelFlags & CM_RACINGFLAG_ALL);
91 if (fidp) rp->fid = *fidp;
92 rp->callbackCount = ++cm_callbackCount;
94 lock_ReleaseWrite(&cm_callbackLock);
98 * When we lose a callback, may have to send change notification replies.
99 * Do not call with a lock on the scp.
101 void cm_CallbackNotifyChange(cm_scache_t *scp)
107 /* why does this have to query the registry each time? */
108 if (RegOpenKeyEx( HKEY_LOCAL_MACHINE,
109 AFSREG_CLT_OPENAFS_SUBKEY,
111 KEY_READ|KEY_QUERY_VALUE,
112 &hKey) == ERROR_SUCCESS) {
114 dummyLen = sizeof(DWORD);
115 RegQueryValueEx(hKey, "CallBack Notify Change Delay", NULL, NULL,
116 (BYTE *) &dwDelay, &dummyLen);
120 if (dwDelay > 5000) /* do not allow a delay of more then 5 seconds */
123 osi_Log3(afsd_logp, "CallbackNotifyChange FileType %d Flags %lX Delay %dms",
124 scp->fileType, scp->flags, dwDelay);
129 /* for directories, this sends a change notification on the dir itself */
130 if (scp->fileType == CM_SCACHETYPE_DIRECTORY) {
132 if (scp->flags & CM_SCACHEFLAG_ANYWATCH)
134 FILE_NOTIFY_GENERIC_DIRECTORY_FILTER,
135 scp, NULL, NULL, TRUE);
137 dc_break_callback(FID_HASH_FN(&scp->fid));
140 /* and for files, this sends a change notification on the file's parent dir */
144 tfid.cell = scp->fid.cell;
145 tfid.volume = scp->fid.volume;
146 tfid.vnode = scp->parentVnode;
147 tfid.unique = scp->parentUnique;
148 dscp = cm_FindSCache(&tfid);
151 dscp->flags & CM_SCACHEFLAG_ANYWATCH )
153 FILE_NOTIFY_GENERIC_FILE_FILTER,
154 dscp, NULL, NULL, TRUE);
157 dc_break_callback(FID_HASH_FN(&dscp->fid));
160 cm_ReleaseSCache(dscp);
164 /* called with no locks held for every file ID that is revoked directly by
165 * a callback revoke call. Does not have to handle volume callback breaks,
166 * since those have already been split out.
168 * The callp parameter is currently unused.
170 void cm_RevokeCallback(struct rx_call *callp, cm_cell_t * cellp, AFSFid *fidp)
176 /* don't bother setting cell, since we won't be checking it (to aid
177 * in working with multi-homed servers: we don't know the cell if we
178 * don't recognize the IP address).
181 tfid.volume = fidp->Volume;
182 tfid.vnode = fidp->Vnode;
183 tfid.unique = fidp->Unique;
184 hash = CM_SCACHE_HASH(&tfid);
186 osi_Log3(afsd_logp, "RevokeCallback vol %u vn %u uniq %u",
187 fidp->Volume, fidp->Vnode, fidp->Unique);
189 /* do this first, so that if we're executing a callback granting call
190 * at this moment, we kill it before it can be merged in. Otherwise,
191 * it could complete while we're doing the scan below, and get missed
192 * by both the scan and by this code.
194 cm_RecordRacingRevoke(&tfid, 0);
196 lock_ObtainWrite(&cm_scacheLock);
197 /* do all in the hash bucket, since we don't know how many we'll find with
200 for (scp = cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
201 if (scp->fid.volume == tfid.volume &&
202 scp->fid.vnode == tfid.vnode &&
203 scp->fid.unique == tfid.unique &&
204 (cellp == NULL || scp->fid.cell == cellp->cellID) &&
205 scp->cbExpires > 0 &&
206 scp->cbServerp != NULL)
208 cm_HoldSCacheNoLock(scp);
209 lock_ReleaseWrite(&cm_scacheLock);
210 osi_Log4(afsd_logp, "RevokeCallback Discarding SCache scp 0x%p vol %u vn %u uniq %u",
211 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
213 lock_ObtainMutex(&scp->mx);
214 cm_DiscardSCache(scp);
215 lock_ReleaseMutex(&scp->mx);
217 cm_CallbackNotifyChange(scp);
219 lock_ObtainWrite(&cm_scacheLock);
220 cm_ReleaseSCacheNoLock(scp);
223 lock_ReleaseWrite(&cm_scacheLock);
225 osi_Log3(afsd_logp, "RevokeCallback Complete vol %u vn %u uniq %u",
226 fidp->Volume, fidp->Vnode, fidp->Unique);
229 /* called to revoke a volume callback, which is typically issued when a volume
230 * is moved from one server to another.
232 * Called with no locks held.
234 void cm_RevokeVolumeCallback(struct rx_call *callp, cm_cell_t *cellp, AFSFid *fidp)
240 osi_Log1(afsd_logp, "RevokeVolumeCallback vol %d", fidp->Volume);
242 /* do this first, so that if we're executing a callback granting call
243 * at this moment, we kill it before it can be merged in. Otherwise,
244 * it could complete while we're doing the scan below, and get missed
245 * by both the scan and by this code.
247 tfid.cell = tfid.vnode = tfid.unique = 0;
248 tfid.volume = fidp->Volume;
249 cm_RecordRacingRevoke(&tfid, CM_RACINGFLAG_CANCELVOL);
251 lock_ObtainWrite(&cm_scacheLock);
252 for (hash = 0; hash < cm_data.scacheHashTableSize; hash++) {
253 for(scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
254 if (scp->fid.volume == fidp->Volume &&
255 (cellp == NULL || scp->fid.cell == cellp->cellID) &&
256 scp->cbExpires > 0 &&
257 scp->cbServerp != NULL) {
258 cm_HoldSCacheNoLock(scp);
259 lock_ReleaseWrite(&cm_scacheLock);
261 lock_ObtainMutex(&scp->mx);
262 osi_Log4(afsd_logp, "RevokeVolumeCallback Discarding SCache scp 0x%p vol %u vn %u uniq %u",
263 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
264 cm_DiscardSCache(scp);
265 lock_ReleaseMutex(&scp->mx);
267 cm_CallbackNotifyChange(scp);
268 lock_ObtainWrite(&cm_scacheLock);
269 cm_ReleaseSCacheNoLock(scp);
271 } /* search one hash bucket */
272 } /* search all hash buckets */
274 lock_ReleaseWrite(&cm_scacheLock);
276 osi_Log1(afsd_logp, "RevokeVolumeCallback Complete vol %d", fidp->Volume);
280 * afs_data_pointer_to_int32() - returns least significant afs_int32 of the
281 * given data pointer, without triggering "cast truncates pointer"
282 * warnings. We use this where we explicitly don't care whether a
283 * pointer is truncated -- it loses information where a pointer is
284 * larger than an afs_int32.
288 afs_data_pointer_to_int32(const void *p)
291 afs_int32 i32[sizeof(void *) / sizeof(afs_int32)];
295 int i32_sub; /* subscript of least significant afs_int32 in ip.i32[] */
300 /* used to determine the byte order of the system */
303 char c[sizeof(int) / sizeof(char)];
309 /* little-endian system */
312 /* big-endian system */
313 i32_sub = (sizeof ip.i32 / sizeof ip.i32[0]) - 1;
318 return ip.i32[i32_sub];
320 /*------------------------------------------------------------------------
321 * EXPORTED SRXAFSCB_CallBack
324 * Routine called by the server-side callback RPC interface to
325 * implement passing in callback information.
329 * rx_call : Ptr to Rx call on which this request came in.
330 * fidsArrayp : Ptr to array of fids involved.
331 * cbsArrayp : Ptr to matching callback info for the fids.
337 * Nothing interesting.
341 *------------------------------------------------------------------------*/
342 /* handle incoming RPC callback breaking message.
343 * Called with no locks held.
346 SRXAFSCB_CallBack(struct rx_call *callp, AFSCBFids *fidsArrayp, AFSCBs *cbsArrayp)
350 struct rx_connection *connp;
351 struct rx_peer *peerp;
352 unsigned long host = 0;
353 unsigned short port = 0;
354 cm_server_t *tsp = NULL;
355 cm_cell_t * cellp = NULL;
357 MUTEX_ENTER(&callp->lock);
359 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
360 host = rx_HostOf(peerp);
361 port = rx_PortOf(peerp);
363 tsp = cm_FindServerByIP(host, CM_SERVER_FILE);
368 osi_Log2(afsd_logp, "SRXAFSCB_CallBack from host 0x%x port %d",
372 for (i=0; i < (long) fidsArrayp->AFSCBFids_len; i++) {
373 tfidp = &fidsArrayp->AFSCBFids_val[i];
375 if (tfidp->Volume == 0)
376 continue; /* means don't do anything */
377 else if (tfidp->Vnode == 0)
378 cm_RevokeVolumeCallback(callp, cellp, tfidp);
380 cm_RevokeCallback(callp, cellp, tfidp);
383 MUTEX_EXIT(&callp->lock);
387 /*------------------------------------------------------------------------
388 * EXPORTED SRXAFSCB_InitCallBackState
391 * Routine called by the server-side callback RPC interface to
392 * implement clearing all callbacks from this host.
395 * rx_call : Ptr to Rx call on which this request came in.
401 * Nothing interesting.
405 *------------------------------------------------------------------------*/
406 /* called with no locks by RPC system when a server indicates that it has never
407 * heard from us, or for other reasons has had to discard callbacks from us
408 * without telling us, e.g. a network partition.
411 SRXAFSCB_InitCallBackState(struct rx_call *callp)
413 struct sockaddr_in taddr;
418 struct rx_connection *connp;
419 struct rx_peer *peerp;
420 unsigned long host = 0;
421 unsigned short port = 0;
423 MUTEX_ENTER(&callp->lock);
425 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
426 host = rx_HostOf(peerp);
427 port = rx_PortOf(peerp);
430 osi_Log2(afsd_logp, "SRXAFSCB_InitCallBackState from host 0x%x port %d",
434 if ((rx_ConnectionOf(callp)) && (rx_PeerOf(rx_ConnectionOf(callp)))) {
435 taddr.sin_family = AF_INET;
436 taddr.sin_addr.s_addr = rx_HostOf(rx_PeerOf(rx_ConnectionOf(callp)));
438 tsp = cm_FindServer(&taddr, CM_SERVER_FILE);
440 osi_Log1(afsd_logp, "Init Callback State server %x", tsp);
442 /* record the callback in the racing revokes structure. This
443 * shouldn't be necessary, since we shouldn't be making callback
444 * granting calls while we're going to get an initstate call,
445 * but there probably are some obscure races, so better safe
448 * We do this first since we don't hold the cm_scacheLock and vnode
449 * locks over the entire callback scan operation below. The
450 * big loop below is guaranteed to hit any callback already
451 * processed. The call to RecordRacingRevoke is guaranteed
452 * to kill any callback that is currently being returned.
453 * Anything that sneaks past both must start
454 * after the call to RecordRacingRevoke.
456 cm_RecordRacingRevoke(NULL, CM_RACINGFLAG_CANCELALL);
458 /* now search all vnodes looking for guys with this callback, if we
459 * found it, or guys with any callbacks, if we didn't find the server
460 * (that's how multihomed machines will appear and how we'll handle
461 * them, albeit a little inefficiently). That is, we're discarding all
462 * callbacks from all hosts if we get an initstate call from an unknown
463 * host. Since these calls are rare, and multihomed servers
464 * are "rare," hopefully this won't be a problem.
466 lock_ObtainWrite(&cm_scacheLock);
467 for (hash = 0; hash < cm_data.scacheHashTableSize; hash++) {
468 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
469 cm_HoldSCacheNoLock(scp);
470 lock_ReleaseWrite(&cm_scacheLock);
471 lock_ObtainMutex(&scp->mx);
473 if (scp->cbExpires > 0 && scp->cbServerp != NULL) {
474 /* we have a callback, now decide if we should clear it */
475 if (scp->cbServerp == tsp || tsp == NULL) {
476 osi_Log4(afsd_logp, "InitCallbackState Discarding SCache scp 0x%p vol %u vn %u uniq %u",
477 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
478 cm_DiscardSCache(scp);
482 lock_ReleaseMutex(&scp->mx);
484 cm_CallbackNotifyChange(scp);
485 lock_ObtainWrite(&cm_scacheLock);
486 cm_ReleaseSCacheNoLock(scp);
487 } /* search one hash bucket */
488 } /* search all hash buckets */
490 lock_ReleaseWrite(&cm_scacheLock);
493 /* reset the No flags on the server */
494 cm_SetServerNo64Bit(tsp, 0);
495 cm_SetServerNoInlineBulk(tsp, 0);
497 /* we're done with the server structure */
501 MUTEX_EXIT(&callp->lock);
505 /*------------------------------------------------------------------------
506 * EXPORTED SRXAFSCB_Probe
509 * Routine called by the server-side callback RPC interface to
510 * implement ``probing'' the Cache Manager, just making sure it's
514 * rx_call : Ptr to Rx call on which this request came in.
520 * Nothing interesting.
524 *------------------------------------------------------------------------*/
526 SRXAFSCB_Probe(struct rx_call *callp)
528 struct rx_connection *connp;
529 struct rx_peer *peerp;
530 unsigned long host = 0;
531 unsigned short port = 0;
533 MUTEX_ENTER(&callp->lock);
535 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
536 host = rx_HostOf(peerp);
537 port = rx_PortOf(peerp);
540 osi_Log2(afsd_logp, "SRXAFSCB_Probe from host 0x%x port %d",
544 MUTEX_EXIT(&callp->lock);
548 /*------------------------------------------------------------------------
549 * EXPORTED SRXAFSCB_GetLock
552 * Routine called by the server-side callback RPC interface to
553 * implement pulling out the contents of a lock in the lock
557 * a_call : Ptr to Rx call on which this request came in.
558 * a_index : Index of desired lock.
559 * a_result : Ptr to a buffer for the given lock.
562 * 0 if everything went fine,
563 * 1 if we were given a bad index.
566 * Nothing interesting.
570 *------------------------------------------------------------------------*/
571 /* debug interface */
573 extern osi_rwlock_t cm_aclLock;
574 extern osi_rwlock_t buf_globalLock;
575 extern osi_rwlock_t cm_callbackLock;
576 extern osi_rwlock_t cm_cellLock;
577 extern osi_rwlock_t cm_connLock;
578 extern osi_rwlock_t cm_daemonLock;
579 extern osi_rwlock_t cm_dnlcLock;
580 extern osi_rwlock_t cm_scacheLock;
581 extern osi_rwlock_t cm_serverLock;
582 extern osi_rwlock_t cm_userLock;
583 extern osi_rwlock_t cm_utilsLock;
584 extern osi_rwlock_t cm_volumeLock;
585 extern osi_rwlock_t smb_globalLock;
586 extern osi_rwlock_t smb_rctLock;
588 extern osi_mutex_t cm_Freelance_Lock;
589 extern osi_mutex_t cm_bufGetMutex;
590 extern osi_mutex_t cm_Afsdsbmt_Lock;
591 extern osi_mutex_t tokenEventLock;
592 extern osi_mutex_t smb_ListenerLock;
593 extern osi_mutex_t smb_RawBufLock;
594 extern osi_mutex_t smb_Dir_Watch_Lock;
596 #define LOCKTYPE_RW 1
597 #define LOCKTYPE_MUTEX 2
598 static struct _ltable {
603 {"cm_scacheLock", (char*)&cm_scacheLock, LOCKTYPE_RW},
604 {"buf_globalLock", (char*)&buf_globalLock, LOCKTYPE_RW},
605 {"cm_serverLock", (char*)&cm_serverLock, LOCKTYPE_RW},
606 {"cm_callbackLock", (char*)&cm_callbackLock, LOCKTYPE_RW},
607 {"cm_aclLock", (char*)&cm_aclLock, LOCKTYPE_RW},
608 {"cm_cellLock", (char*)&cm_cellLock, LOCKTYPE_RW},
609 {"cm_connLock", (char*)&cm_connLock, LOCKTYPE_RW},
610 {"cm_userLock", (char*)&cm_userLock, LOCKTYPE_RW},
611 {"cm_volumeLock", (char*)&cm_volumeLock, LOCKTYPE_RW},
612 {"cm_daemonLock", (char*)&cm_daemonLock, LOCKTYPE_RW},
613 {"cm_dnlcLock", (char*)&cm_dnlcLock, LOCKTYPE_RW},
614 {"cm_utilsLock", (char*)&cm_utilsLock, LOCKTYPE_RW},
615 {"smb_globalLock", (char*)&smb_globalLock, LOCKTYPE_RW},
616 {"smb_rctLock", (char*)&smb_rctLock, LOCKTYPE_RW},
617 {"cm_Freelance_Lock",(char*)&cm_Freelance_Lock, LOCKTYPE_MUTEX},
618 {"cm_bufGetMutex", (char*)&cm_bufGetMutex, LOCKTYPE_MUTEX},
619 {"cm_Afsdsbmt_Lock", (char*)&cm_Afsdsbmt_Lock, LOCKTYPE_MUTEX},
620 {"tokenEventLock", (char*)&tokenEventLock, LOCKTYPE_MUTEX},
621 {"smb_ListenerLock", (char*)&smb_ListenerLock, LOCKTYPE_MUTEX},
622 {"smb_RawBufLock", (char*)&smb_RawBufLock, LOCKTYPE_MUTEX},
623 {"smb_Dir_Watch_Lock",(char*)&smb_Dir_Watch_Lock, LOCKTYPE_MUTEX}
627 SRXAFSCB_GetLock(struct rx_call *callp, long index, AFSDBLock *lockp)
629 struct _ltable *tl; /*Ptr to lock table entry */
632 int nentries; /*Num entries in table */
633 int code; /*Return code */
634 struct rx_connection *connp;
635 struct rx_peer *peerp;
636 unsigned long host = 0;
637 unsigned short port = 0;
639 MUTEX_ENTER(&callp->lock);
641 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
642 host = rx_HostOf(peerp);
643 port = rx_PortOf(peerp);
646 osi_Log3(afsd_logp, "SRXAFSCB_GetLock(%d) from host 0x%x port %d",
647 index, ntohl(host), ntohs(port));
649 nentries = sizeof(ltable) / sizeof(struct _ltable);
650 if (index < 0 || index >= nentries) {
657 * Found it - copy out its contents.
660 strncpy(lockp->name, tl->name, sizeof(lockp->name));
661 lockp->name[sizeof(lockp->name)-1] = '\0';
662 lockp->lock.waitStates = 0;
663 switch ( tl->type ) {
665 rwp = (osi_rwlock_t *)tl->addr;
666 lockp->lock.exclLocked = rwp->flags;
667 lockp->lock.readersReading = rwp->readers;
668 lockp->lock.numWaiting = rwp->waiters;
671 mtxp = (osi_mutex_t *)tl->addr;
672 lockp->lock.exclLocked = mtxp->flags;
673 lockp->lock.readersReading = 0;
674 lockp->lock.numWaiting = mtxp->waiters;
677 lockp->lock.pid_last_reader = 0;
678 lockp->lock.pid_writer = 0;
679 lockp->lock.src_indicator = 0;
683 MUTEX_EXIT(&callp->lock);
687 /* debug interface */
689 SRXAFSCB_GetCE(struct rx_call *callp, long index, AFSDBCacheEntry *cep)
694 struct rx_connection *connp;
695 struct rx_peer *peerp;
696 unsigned long host = 0;
697 unsigned short port = 0;
699 MUTEX_ENTER(&callp->lock);
701 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
702 host = rx_HostOf(peerp);
703 port = rx_PortOf(peerp);
706 osi_Log2(afsd_logp, "SRXAFSCB_GetCE from host 0x%x port %d",
707 ntohl(host), ntohs(port));
709 lock_ObtainRead(&cm_scacheLock);
710 for (i = 0; i < cm_data.scacheHashTableSize; i++) {
711 for (scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp) {
715 } /*Zip through current hash chain */
716 } /*Zip through hash chains */
726 * Copy out the located entry.
728 memset(cep, 0, sizeof(AFSDBCacheEntry));
729 cep->addr = afs_data_pointer_to_int32(scp);
730 cep->cell = scp->fid.cell;
731 cep->netFid.Volume = scp->fid.volume;
732 cep->netFid.Vnode = scp->fid.vnode;
733 cep->netFid.Unique = scp->fid.unique;
734 cep->lock.waitStates = 0;
735 cep->lock.exclLocked = scp->mx.flags;
736 cep->lock.readersReading = 0;
737 cep->lock.numWaiting = scp->mx.waiters;
738 cep->lock.pid_last_reader = 0;
739 cep->lock.pid_writer = 0;
740 cep->lock.src_indicator = 0;
741 cep->Length = scp->length.LowPart;
742 cep->DataVersion = scp->dataVersion;
743 cep->callback = afs_data_pointer_to_int32(scp->cbServerp);
744 cep->cbExpires = scp->cbExpires;
745 cep->refCount = scp->refCount;
746 cep->opens = scp->openReads;
747 cep->writers = scp->openWrites;
748 switch (scp->fileType) {
749 case CM_SCACHETYPE_FILE:
752 case CM_SCACHETYPE_MOUNTPOINT:
755 case CM_SCACHETYPE_DIRECTORY:
756 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
761 case CM_SCACHETYPE_SYMLINK:
764 case CM_SCACHETYPE_DFSLINK:
767 case CM_SCACHETYPE_INVALID:
772 if (scp->flags & CM_SCACHEFLAG_STATD)
774 if (scp->flags & CM_SCACHEFLAG_RO || scp->flags & CM_SCACHEFLAG_PURERO)
776 if (scp->fileType == CM_SCACHETYPE_MOUNTPOINT &&
777 scp->mountPointStringp[0])
779 if (scp->flags & CM_SCACHEFLAG_WAITING)
784 * Return our results.
787 lock_ReleaseRead(&cm_scacheLock);
789 MUTEX_EXIT(&callp->lock);
793 /* debug interface */
795 SRXAFSCB_GetCE64(struct rx_call *callp, long index, AFSDBCacheEntry64 *cep)
800 struct rx_connection *connp;
801 struct rx_peer *peerp;
802 unsigned long host = 0;
803 unsigned short port = 0;
805 MUTEX_ENTER(&callp->lock);
807 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
808 host = rx_HostOf(peerp);
809 port = rx_PortOf(peerp);
812 osi_Log2(afsd_logp, "SRXAFSCB_GetCE64 from host 0x%x port %d",
813 ntohl(host), ntohs(port));
815 lock_ObtainRead(&cm_scacheLock);
816 for (i = 0; i < cm_data.scacheHashTableSize; i++) {
817 for (scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp) {
821 } /*Zip through current hash chain */
822 } /*Zip through hash chains */
832 * Copy out the located entry.
834 memset(cep, 0, sizeof(AFSDBCacheEntry64));
835 cep->addr = afs_data_pointer_to_int32(scp);
836 cep->cell = scp->fid.cell;
837 cep->netFid.Volume = scp->fid.volume;
838 cep->netFid.Vnode = scp->fid.vnode;
839 cep->netFid.Unique = scp->fid.unique;
840 cep->lock.waitStates = 0;
841 cep->lock.exclLocked = scp->mx.flags;
842 cep->lock.readersReading = 0;
843 cep->lock.numWaiting = scp->mx.waiters;
844 cep->lock.pid_last_reader = 0;
845 cep->lock.pid_writer = 0;
846 cep->lock.src_indicator = 0;
847 #if !defined(AFS_64BIT_ENV)
848 cep->Length.high = scp->length.HighPart;
849 cep->Length.low = scp->length.LowPart;
851 cep->Length = (afs_int64) scp->length.QuadPart;
853 cep->DataVersion = scp->dataVersion;
854 cep->callback = afs_data_pointer_to_int32(scp->cbServerp);
855 cep->cbExpires = scp->cbExpires;
856 cep->refCount = scp->refCount;
857 cep->opens = scp->openReads;
858 cep->writers = scp->openWrites;
859 switch (scp->fileType) {
860 case CM_SCACHETYPE_FILE:
863 case CM_SCACHETYPE_MOUNTPOINT:
866 case CM_SCACHETYPE_DIRECTORY:
867 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
872 case CM_SCACHETYPE_SYMLINK:
875 case CM_SCACHETYPE_DFSLINK:
878 case CM_SCACHETYPE_INVALID:
883 if (scp->flags & CM_SCACHEFLAG_STATD)
885 if (scp->flags & CM_SCACHEFLAG_RO || scp->flags & CM_SCACHEFLAG_PURERO)
887 if (scp->fileType == CM_SCACHETYPE_MOUNTPOINT &&
888 scp->mountPointStringp[0])
890 if (scp->flags & CM_SCACHEFLAG_WAITING)
895 * Return our results.
898 lock_ReleaseRead(&cm_scacheLock);
900 MUTEX_EXIT(&callp->lock);
904 /* debug interface: not implemented */
906 SRXAFSCB_XStatsVersion(struct rx_call *callp, long *vp)
908 struct rx_connection *connp;
909 struct rx_peer *peerp;
910 unsigned long host = 0;
911 unsigned short port = 0;
913 MUTEX_ENTER(&callp->lock);
915 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
916 host = rx_HostOf(peerp);
917 port = rx_PortOf(peerp);
920 osi_Log2(afsd_logp, "SRXAFSCB_XStatsVersion from host 0x%x port %d - not implemented",
921 ntohl(host), ntohs(port));
924 MUTEX_EXIT(&callp->lock);
928 /* debug interface: not implemented */
930 SRXAFSCB_GetXStats(struct rx_call *callp, long cvn, long coln, long *srvp, long *timep,
931 AFSCB_CollData *datap)
933 struct rx_connection *connp;
934 struct rx_peer *peerp;
935 unsigned long host = 0;
936 unsigned short port = 0;
938 MUTEX_ENTER(&callp->lock);
940 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
941 host = rx_HostOf(peerp);
942 port = rx_PortOf(peerp);
945 osi_Log2(afsd_logp, "SRXAFSCB_GetXStats from host 0x%x port %d - not implemented",
946 ntohl(host), ntohs(port));
948 MUTEX_EXIT(&callp->lock);
953 SRXAFSCB_InitCallBackState2(struct rx_call *callp, struct interfaceAddr* addr)
955 osi_Log0(afsd_logp, "SRXAFSCB_InitCallBackState2 ->");
957 return SRXAFSCB_InitCallBackState(callp);
960 /* debug interface */
962 SRXAFSCB_WhoAreYou(struct rx_call *callp, struct interfaceAddr* addr)
965 int cm_noIPAddr; /* number of client network interfaces */
966 int cm_IPAddr[CM_MAXINTERFACE_ADDR]; /* client's IP address in host order */
967 int cm_SubnetMask[CM_MAXINTERFACE_ADDR];/* client's subnet mask in host order*/
968 int cm_NetMtu[CM_MAXINTERFACE_ADDR]; /* client's MTU sizes */
969 int cm_NetFlags[CM_MAXINTERFACE_ADDR]; /* network flags */
971 struct rx_connection *connp;
972 struct rx_peer *peerp;
973 unsigned long host = 0;
974 unsigned short port = 0;
976 MUTEX_ENTER(&callp->lock);
978 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
979 host = rx_HostOf(peerp);
980 port = rx_PortOf(peerp);
983 /* get network related info */
984 cm_noIPAddr = CM_MAXINTERFACE_ADDR;
985 code = syscfg_GetIFInfo(&cm_noIPAddr,
986 cm_IPAddr, cm_SubnetMask,
987 cm_NetMtu, cm_NetFlags);
989 /* return all network interface addresses */
990 osi_Log2(afsd_logp, "SRXAFSCB_WhoAreYou from host 0x%x port %d",
994 addr->numberOfInterfaces = cm_noIPAddr;
995 addr->uuid = cm_data.Uuid;
996 for ( i=0; i < cm_noIPAddr; i++ ) {
997 addr->addr_in[i] = cm_IPAddr[i];
998 addr->subnetmask[i] = cm_SubnetMask[i];
999 addr->mtu[i] = (rx_mtu == -1 || (rx_mtu != -1 && cm_NetMtu[i] < rx_mtu)) ?
1000 cm_NetMtu[i] : rx_mtu;
1003 MUTEX_EXIT(&callp->lock);
1008 SRXAFSCB_InitCallBackState3(struct rx_call *callp, afsUUID* serverUuid)
1012 if (UuidToString((UUID *)serverUuid, &p) == RPC_S_OK) {
1013 osi_Log1(afsd_logp, "SRXAFSCB_InitCallBackState3 %s ->",p);
1016 osi_Log0(afsd_logp, "SRXAFSCB_InitCallBackState3 - no server Uuid ->");
1018 return SRXAFSCB_InitCallBackState(callp);
1021 /* debug interface */
1023 SRXAFSCB_ProbeUuid(struct rx_call *callp, afsUUID* clientUuid)
1025 struct rx_connection *connp;
1026 struct rx_peer *peerp;
1027 unsigned long host = 0;
1028 unsigned short port = 0;
1032 MUTEX_ENTER(&callp->lock);
1034 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1035 host = rx_HostOf(peerp);
1036 port = rx_PortOf(peerp);
1039 if ( !afs_uuid_equal(&cm_data.Uuid, clientUuid) ) {
1040 UuidToString((UUID *)&cm_data.Uuid, &p);
1041 UuidToString((UUID *)clientUuid, &q);
1042 osi_Log4(afsd_logp, "SRXAFSCB_ProbeUuid %s != %s from host 0x%x port %d",
1043 osi_LogSaveString(afsd_logp,p),
1044 osi_LogSaveString(afsd_logp,q),
1050 code = 1; /* failure */
1052 osi_Log2(afsd_logp, "SRXAFSCB_ProbeUuid (success) from host 0x%x port %d",
1056 MUTEX_EXIT(&callp->lock);
1060 /* debug interface */
1062 SRXAFSCB_GetCellByNum(struct rx_call *callp, afs_int32 a_cellnum,
1063 char **a_name, serverList *a_hosts)
1067 cm_serverRef_t * serverRefp;
1068 struct rx_connection *connp;
1069 struct rx_peer *peerp;
1070 unsigned long host = 0;
1071 unsigned short port = 0;
1073 MUTEX_ENTER(&callp->lock);
1075 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1076 host = rx_HostOf(peerp);
1077 port = rx_PortOf(peerp);
1080 osi_Log3(afsd_logp, "SRXAFSCB_GetCellByNum(%d) from host 0x%x port %d",
1081 a_cellnum, ntohl(host), ntohs(port));
1083 a_hosts->serverList_val = 0;
1084 a_hosts->serverList_len = 0;
1086 cellp = cm_FindCellByID(a_cellnum);
1088 *a_name = strdup("");
1089 MUTEX_EXIT(&callp->lock);
1093 lock_ObtainRead(&cm_serverLock);
1094 *a_name = strdup(cellp->name);
1096 for ( sn = 0, serverRefp = cellp->vlServersp;
1097 sn < AFSMAXCELLHOSTS && serverRefp;
1098 sn++, serverRefp = serverRefp->next);
1100 a_hosts->serverList_len = sn;
1101 a_hosts->serverList_val = (afs_int32 *)osi_Alloc(sn * sizeof(afs_int32));
1103 for ( sn = 0, serverRefp = cellp->vlServersp;
1104 sn < AFSMAXCELLHOSTS && serverRefp;
1105 sn++, serverRefp = serverRefp->next)
1107 a_hosts->serverList_val[sn] = ntohl(serverRefp->server->addr.sin_addr.s_addr);
1110 lock_ReleaseRead(&cm_serverLock);
1111 MUTEX_EXIT(&callp->lock);
1115 /* debug interface */
1117 SRXAFSCB_TellMeAboutYourself( struct rx_call *callp,
1118 struct interfaceAddr *addr,
1119 Capabilities * capabilities)
1122 afs_int32 *dataBuffP;
1123 afs_int32 dataBytes;
1124 int cm_noIPAddr; /* number of client network interfaces */
1125 int cm_IPAddr[CM_MAXINTERFACE_ADDR]; /* client's IP address in host order */
1126 int cm_SubnetMask[CM_MAXINTERFACE_ADDR];/* client's subnet mask in host order*/
1127 int cm_NetMtu[CM_MAXINTERFACE_ADDR]; /* client's MTU sizes */
1128 int cm_NetFlags[CM_MAXINTERFACE_ADDR]; /* network flags */
1130 struct rx_connection *connp;
1131 struct rx_peer *peerp;
1132 unsigned long host = 0;
1133 unsigned short port = 0;
1135 MUTEX_ENTER(&callp->lock);
1137 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1138 host = rx_HostOf(peerp);
1139 port = rx_PortOf(peerp);
1142 /* get network related info */
1143 cm_noIPAddr = CM_MAXINTERFACE_ADDR;
1144 code = syscfg_GetIFInfo(&cm_noIPAddr,
1145 cm_IPAddr, cm_SubnetMask,
1146 cm_NetMtu, cm_NetFlags);
1148 osi_Log2(afsd_logp, "SRXAFSCB_TellMeAboutYourself from host 0x%x port %d",
1152 /* return all network interface addresses */
1153 addr->numberOfInterfaces = cm_noIPAddr;
1154 addr->uuid = cm_data.Uuid;
1155 for ( i=0; i < cm_noIPAddr; i++ ) {
1156 addr->addr_in[i] = cm_IPAddr[i];
1157 addr->subnetmask[i] = cm_SubnetMask[i];
1158 addr->mtu[i] = (rx_mtu == -1 || (rx_mtu != -1 && cm_NetMtu[i] < rx_mtu)) ?
1159 cm_NetMtu[i] : rx_mtu;
1162 dataBytes = 1 * sizeof(afs_int32);
1163 dataBuffP = (afs_int32 *) osi_Alloc(dataBytes);
1164 dataBuffP[0] = CLIENT_CAPABILITY_ERRORTRANS;
1165 capabilities->Capabilities_len = dataBytes / sizeof(afs_int32);
1166 capabilities->Capabilities_val = dataBuffP;
1168 MUTEX_EXIT(&callp->lock);
1172 /*------------------------------------------------------------------------
1173 * EXPORTED SRXAFSCB_GetServerPrefs
1176 * Routine to list server preferences used by this client.
1179 * a_call : Ptr to Rx call on which this request came in.
1180 * a_index : Input server index
1181 * a_srvr_addr : Output server address (0xffffffff on last server)
1182 * a_srvr_rank : Output server rank
1188 * Nothing interesting.
1192 *------------------------------------------------------------------------*/
1194 int SRXAFSCB_GetServerPrefs(
1195 struct rx_call *callp,
1197 afs_int32 *a_srvr_addr,
1198 afs_int32 *a_srvr_rank)
1200 struct rx_connection *connp;
1201 struct rx_peer *peerp;
1202 unsigned long host = 0;
1203 unsigned short port = 0;
1205 MUTEX_ENTER(&callp->lock);
1207 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1208 host = rx_HostOf(peerp);
1209 port = rx_PortOf(peerp);
1212 osi_Log2(afsd_logp, "SRXAFSCB_GetServerPrefs from host 0x%x port %d - not implemented",
1216 *a_srvr_addr = 0xffffffff;
1217 *a_srvr_rank = 0xffffffff;
1219 MUTEX_EXIT(&callp->lock);
1223 /*------------------------------------------------------------------------
1224 * EXPORTED SRXAFSCB_GetCellServDB
1227 * Routine to list cells configured for this client
1230 * a_call : Ptr to Rx call on which this request came in.
1231 * a_index : Input cell index
1232 * a_name : Output cell name ("" on last cell)
1233 * a_hosts : Output cell database servers
1239 * Nothing interesting.
1243 *------------------------------------------------------------------------*/
1245 int SRXAFSCB_GetCellServDB(struct rx_call *callp, afs_int32 index, char **a_name,
1246 serverList *a_hosts)
1249 struct rx_connection *connp;
1250 struct rx_peer *peerp;
1251 unsigned long host = 0;
1252 unsigned short port = 0;
1254 MUTEX_ENTER(&callp->lock);
1256 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1257 host = rx_HostOf(peerp);
1258 port = rx_PortOf(peerp);
1261 osi_Log2(afsd_logp, "SRXAFSCB_GetCellServDB from host 0x%x port %d - not implemented",
1262 ntohl(host), ntohs(port));
1264 t_name = (char *)malloc(AFSNAMEMAX);
1267 a_hosts->serverList_len = 0;
1269 MUTEX_EXIT(&callp->lock);
1273 /*------------------------------------------------------------------------
1274 * EXPORTED SRXAFSCB_GetLocalCell
1277 * Routine to return name of client's local cell
1280 * a_call : Ptr to Rx call on which this request came in.
1281 * a_name : Output cell name
1287 * Nothing interesting.
1291 *------------------------------------------------------------------------*/
1293 int SRXAFSCB_GetLocalCell(struct rx_call *callp, char **a_name)
1296 struct rx_connection *connp;
1297 struct rx_peer *peerp;
1298 unsigned long host = 0;
1299 unsigned short port = 0;
1301 MUTEX_ENTER(&callp->lock);
1303 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1304 host = rx_HostOf(peerp);
1305 port = rx_PortOf(peerp);
1308 osi_Log2(afsd_logp, "SRXAFSCB_GetLocalCell from host 0x%x port %d",
1309 ntohl(host), ntohs(port));
1311 if (cm_data.rootCellp) {
1312 t_name = (char *)malloc(strlen(cm_data.rootCellp->name)+1);
1313 strcpy(t_name, cm_data.rootCellp->name);
1315 t_name = (char *)malloc(1);
1320 MUTEX_EXIT(&callp->lock);
1326 * afs_MarshallCacheConfig - marshall client cache configuration
1330 * IN callerVersion - the rpc stat version of the caller.
1332 * IN config - client cache configuration.
1334 * OUT ptr - buffer where configuration is marshalled.
1340 static void afs_MarshallCacheConfig(
1341 afs_uint32 callerVersion,
1342 cm_initparams_v1 *config,
1346 * We currently only support version 1.
1348 *(ptr++) = config->nChunkFiles;
1349 *(ptr++) = config->nStatCaches;
1350 *(ptr++) = config->nDataCaches;
1351 *(ptr++) = config->nVolumeCaches;
1352 *(ptr++) = config->firstChunkSize;
1353 *(ptr++) = config->otherChunkSize;
1354 *(ptr++) = config->cacheSize;
1355 *(ptr++) = config->setTime;
1356 *(ptr++) = config->memCache;
1361 /*------------------------------------------------------------------------
1362 * EXPORTED SRXAFSCB_GetCacheConfig
1365 * Routine to return parameters used to initialize client cache.
1366 * Client may request any format version. Server may not return
1367 * format version greater than version requested by client.
1370 * a_call: Ptr to Rx call on which this request came in.
1371 * callerVersion: Data format version desired by the client.
1372 * serverVersion: Data format version of output data.
1373 * configCount: Number bytes allocated for output data.
1374 * config: Client cache configuration.
1380 * Nothing interesting.
1384 *------------------------------------------------------------------------*/
1386 int SRXAFSCB_GetCacheConfig(struct rx_call *callp,
1387 afs_uint32 callerVersion,
1388 afs_uint32 *serverVersion,
1389 afs_uint32 *configCount,
1390 cacheConfig *config)
1392 afs_uint32 *t_config;
1394 extern cm_initparams_v1 cm_initParams;
1395 struct rx_connection *connp;
1396 struct rx_peer *peerp;
1397 unsigned long host = 0;
1398 unsigned short port = 0;
1400 MUTEX_ENTER(&callp->lock);
1402 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1403 host = rx_HostOf(peerp);
1404 port = rx_PortOf(peerp);
1407 osi_Log2(afsd_logp, "SRXAFSCB_GetCacheConfig from host 0x%x port %d - version 1 only",
1408 ntohl(host), ntohs(port));
1411 * Currently only support version 1
1413 allocsize = sizeof(cm_initparams_v1);
1414 t_config = (afs_uint32 *)malloc(allocsize);
1416 afs_MarshallCacheConfig(callerVersion, &cm_initParams, t_config);
1418 *serverVersion = AFS_CLIENT_RETRIEVAL_FIRST_EDITION;
1421 #define SIZE_MAX UINT_MAX
1423 osi_assert(allocsize < SIZE_MAX);
1425 *configCount = (afs_uint32)allocsize;
1426 config->cacheConfig_val = t_config;
1427 config->cacheConfig_len = (*configCount)/sizeof(afs_uint32);
1429 MUTEX_EXIT(&callp->lock);
1433 /* called by afsd without any locks to initialize this module */
1434 void cm_InitCallback(void)
1436 lock_InitializeRWLock(&cm_callbackLock, "cm_callbackLock");
1437 cm_activeCallbackGrantingCalls = 0;
1440 /* called with locked scp; tells us whether we've got a callback.
1441 * Expirations are checked by a background daemon so as to make
1442 * this function as inexpensive as possible
1444 int cm_HaveCallback(cm_scache_t *scp)
1446 #ifdef AFS_FREELANCE_CLIENT
1447 // yj: we handle callbacks specially for callbacks on the root directory
1448 // Since it's local, we almost always say that we have callback on it
1449 // The only time we send back a 0 is if we're need to initialize or
1450 // reinitialize the fake directory
1452 // There are 2 state variables cm_fakeGettingCallback and cm_fakeDirCallback
1453 // cm_fakeGettingCallback is 1 if we're in the process of initialization and
1454 // hence should return false. it's 0 otherwise
1455 // cm_fakeDirCallback is 0 if we haven't loaded the fake directory, it's 1
1456 // if the fake directory is loaded and this is the first time cm_HaveCallback
1457 // is called since then. We return false in this case to allow cm_GetCallback
1458 // to be called because cm_GetCallback has some initialization work to do.
1459 // If cm_fakeDirCallback is 2, then it means that the fake directory is in
1460 // good shape and we simply return true, provided no change is detected.
1463 if (cm_freelanceEnabled &&
1464 scp->fid.cell==AFS_FAKE_ROOT_CELL_ID && scp->fid.volume==AFS_FAKE_ROOT_VOL_ID) {
1465 /* if it's something on /afs */
1466 if (!(scp->fid.vnode==0x1 && scp->fid.unique==0x1)) {
1467 /* if it's not root.afs */
1471 lock_ObtainMutex(&cm_Freelance_Lock);
1472 fdc = cm_fakeDirCallback;
1473 fgc = cm_fakeGettingCallback;
1474 lock_ReleaseMutex(&cm_Freelance_Lock);
1476 if (fdc==1) { // first call since init
1478 } else if (fdc==2 && !fgc) { // we're in good shape
1479 if (cm_getLocalMountPointChange()) { // check for changes
1480 cm_clearLocalMountPointChange(); // clear the changefile
1481 lock_ReleaseMutex(&scp->mx); // this is re-locked in reInitLocalMountPoints
1482 cm_reInitLocalMountPoints(); // start reinit
1483 lock_ObtainMutex(&scp->mx); // now get the lock back
1486 return 1; // no change
1492 if (scp->cbServerp != NULL) {
1494 } else if (cm_OfflineROIsValid) {
1495 switch (cm_GetVolumeStatus(scp->volp, scp->fid.volume)) {
1508 /* need to detect a broken callback that races with our obtaining a callback.
1509 * Need to be able to do this even if we don't know the file ID of the file
1510 * we're breaking the callback on at the time we start the acquisition of the
1511 * callback (as in the case where we are creating a file).
1513 * So, we start by writing down the count of the # of callbacks we've received
1514 * so far, and bumping a global counter of the # of callback granting calls
1515 * outstanding (all done under cm_callbackLock).
1517 * When we're back from the call, we look at all of the callback revokes with
1518 * counter numbers greater than the one we recorded in our caller's structure,
1519 * and replay those that are higher than when we started the call.
1521 * We free all the structures in the queue when the count of the # of outstanding
1522 * callback-granting calls drops to zero.
1524 * We call this function with the scp locked, too, but in its current implementation,
1525 * this knowledge is not used.
1527 void cm_StartCallbackGrantingCall(cm_scache_t *scp, cm_callbackRequest_t *cbrp)
1529 lock_ObtainWrite(&cm_callbackLock);
1530 cbrp->callbackCount = cm_callbackCount;
1531 cm_activeCallbackGrantingCalls++;
1532 cbrp->startTime = osi_Time();
1533 cbrp->serverp = NULL;
1534 lock_ReleaseWrite(&cm_callbackLock);
1537 /* Called at the end of a callback-granting call, to remove the callback
1538 * info from the scache entry, if necessary.
1540 * Called with scp locked, so we can discard the callbacks easily with
1541 * this locking hierarchy.
1543 void cm_EndCallbackGrantingCall(cm_scache_t *scp, cm_callbackRequest_t *cbrp,
1544 AFSCallBack *cbp, long flags)
1546 cm_racingRevokes_t *revp; /* where we are */
1547 cm_racingRevokes_t *nrevp; /* where we'll be next */
1549 cm_server_t * serverp = NULL;
1552 lock_ObtainWrite(&cm_callbackLock);
1553 if (flags & CM_CALLBACK_MAINTAINCOUNT) {
1554 osi_assert(cm_activeCallbackGrantingCalls > 0);
1557 osi_assert(cm_activeCallbackGrantingCalls-- > 0);
1559 if (cm_activeCallbackGrantingCalls == 0)
1564 /* record the callback; we'll clear it below if we really lose it */
1567 if (scp->cbServerp != cbrp->serverp) {
1568 serverp = scp->cbServerp;
1570 cm_GetServer(cbrp->serverp);
1571 scp->cbServerp = cbrp->serverp;
1574 serverp = cbrp->serverp;
1576 scp->cbExpires = cbrp->startTime + cbp->ExpirationTime;
1579 serverp = cbrp->serverp;
1582 cbrp->serverp = NULL;
1585 /* a callback was actually revoked during our granting call, so
1586 * run down the list of revoked fids, looking for ours.
1587 * If activeCallbackGrantingCalls is zero, free the elements, too.
1589 * May need to go through entire list just to do the freeing.
1591 for (revp = cm_racingRevokesp; revp; revp = nrevp) {
1592 nrevp = (cm_racingRevokes_t *) osi_QNext(&revp->q);
1593 /* if this callback came in later than when we started the
1594 * callback-granting call, and if this fid is the right fid,
1595 * then clear the callback.
1597 if (scp && cbrp && cbrp->callbackCount != cm_callbackCount
1598 && revp->callbackCount > cbrp->callbackCount
1599 && (( scp->fid.volume == revp->fid.volume &&
1600 scp->fid.vnode == revp->fid.vnode &&
1601 scp->fid.unique == revp->fid.unique)
1603 ((revp->flags & CM_RACINGFLAG_CANCELVOL) &&
1604 scp->fid.volume == revp->fid.volume)
1606 (revp->flags & CM_RACINGFLAG_CANCELALL))) {
1607 /* this one matches */
1609 "Racing revoke scp 0x%p old cbc %d rev cbc %d cur cbc %d",
1611 cbrp->callbackCount, revp->callbackCount,
1619 /* if we freed the list, zap the pointer to it */
1621 cm_racingRevokesp = NULL;
1623 lock_ReleaseWrite(&cm_callbackLock);
1626 cm_DiscardSCache(scp);
1627 lock_ReleaseMutex(&scp->mx);
1628 cm_CallbackNotifyChange(scp);
1629 lock_ObtainMutex(&scp->mx);
1633 lock_ObtainWrite(&cm_serverLock);
1634 cm_FreeServer(serverp);
1635 lock_ReleaseWrite(&cm_serverLock);
1639 /* if flags is 1, we want to force the code to make one call, anyway.
1640 * called with locked scp; returns with same.
1642 long cm_GetCallback(cm_scache_t *scp, struct cm_user *userp,
1643 struct cm_req *reqp, long flags)
1646 cm_conn_t *connp = NULL;
1647 AFSFetchStatus afsStatus;
1649 AFSCallBack callback;
1651 cm_callbackRequest_t cbr;
1654 struct rx_connection * callp = NULL;
1655 int syncop_done = 0;
1657 osi_Log4(afsd_logp, "GetCallback scp 0x%p cell %d vol %d flags %lX",
1658 scp, scp->fid.cell, scp->fid.volume, flags);
1660 #ifdef AFS_FREELANCE_CLIENT
1661 // The case where a callback is needed on /afs is handled
1662 // specially. We need to fetch the status by calling
1663 // cm_MergeStatus and mark that cm_fakeDirCallback is 2
1664 if (cm_freelanceEnabled) {
1665 if (scp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
1666 scp->fid.volume==AFS_FAKE_ROOT_VOL_ID &&
1667 scp->fid.unique==0x1 &&
1668 scp->fid.vnode==0x1) {
1670 // Start by indicating that we're in the process
1671 // of fetching the callback
1672 lock_ObtainMutex(&cm_Freelance_Lock);
1673 osi_Log0(afsd_logp,"cm_getGetCallback fakeGettingCallback=1");
1674 cm_fakeGettingCallback = 1;
1675 lock_ReleaseMutex(&cm_Freelance_Lock);
1677 // Fetch the status info
1678 cm_MergeStatus(NULL, scp, &afsStatus, &volSync, userp, 0);
1680 // Indicate that the callback is not done
1681 lock_ObtainMutex(&cm_Freelance_Lock);
1682 osi_Log0(afsd_logp,"cm_getGetCallback fakeDirCallback=2");
1683 cm_fakeDirCallback = 2;
1685 // Indicate that we're no longer fetching the callback
1686 osi_Log0(afsd_logp,"cm_getGetCallback fakeGettingCallback=0");
1687 cm_fakeGettingCallback = 0;
1688 lock_ReleaseMutex(&cm_Freelance_Lock);
1693 if (scp->fid.cell==AFS_FAKE_ROOT_CELL_ID && scp->fid.volume==AFS_FAKE_ROOT_VOL_ID) {
1694 osi_Log0(afsd_logp,"cm_getcallback should NEVER EVER get here... ");
1697 #endif /* AFS_FREELANCE_CLIENT */
1699 mustCall = (flags & 1);
1700 cm_AFSFidFromFid(&tfid, &scp->fid);
1702 if (!mustCall && cm_HaveCallback(scp))
1705 /* turn off mustCall, since it has now forced us past the check above */
1708 /* otherwise, we have to make an RPC to get the status */
1710 code = cm_SyncOp(scp, NULL, userp, reqp, 0,
1711 CM_SCACHESYNC_FETCHSTATUS | CM_SCACHESYNC_GETCALLBACK);
1716 cm_StartCallbackGrantingCall(scp, &cbr);
1718 lock_ReleaseMutex(&scp->mx);
1720 /* now make the RPC */
1721 osi_Log4(afsd_logp, "CALL FetchStatus scp 0x%p vol %u vn %u uniq %u",
1722 scp, sfid.volume, sfid.vnode, sfid.unique);
1724 code = cm_ConnFromFID(&sfid, userp, reqp, &connp);
1728 callp = cm_GetRxConn(connp);
1729 code = RXAFS_FetchStatus(callp, &tfid,
1730 &afsStatus, &callback, &volSync);
1731 rx_PutConnection(callp);
1733 } while (cm_Analyze(connp, userp, reqp, &sfid, &volSync, NULL,
1735 code = cm_MapRPCError(code, reqp);
1737 osi_Log4(afsd_logp, "CALL FetchStatus FAILURE code 0x%x scp 0x%p vol %u vn %u",
1738 code, scp, scp->fid.volume, scp->fid.vnode);
1740 osi_Log4(afsd_logp, "CALL FetchStatus SUCCESS scp 0x%p vol %u vn %u uniq %u",
1741 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1743 lock_ObtainMutex(&scp->mx);
1745 cm_EndCallbackGrantingCall(scp, &cbr, &callback, 0);
1746 cm_MergeStatus(NULL, scp, &afsStatus, &volSync, userp, 0);
1748 cm_EndCallbackGrantingCall(NULL, &cbr, NULL, 0);
1751 /* if we got an error, return to caller */
1757 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_FETCHSTATUS | CM_SCACHESYNC_GETCALLBACK);
1760 osi_Log2(afsd_logp, "GetCallback Failed code 0x%x scp 0x%p -->",code, scp);
1761 osi_Log4(afsd_logp, " cell %u vol %u vn %u uniq %u",
1762 scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1764 osi_Log3(afsd_logp, "GetCallback Complete scp 0x%p cell %d vol %d",
1765 scp, scp->fid.cell, scp->fid.volume);
1772 /* called with cm_scacheLock held */
1773 long cm_CBServersUp(cm_scache_t *scp, time_t * downTime)
1775 cm_vol_state_t *statep;
1776 cm_volume_t * volp = scp->volp;
1777 afs_uint32 volID = scp->fid.volume;
1778 cm_serverRef_t *tsrp;
1783 if (scp->cbServerp == NULL)
1786 if (volp->rw.ID == volID) {
1788 } else if (volp->ro.ID == volID) {
1790 } else if (volp->bk.ID == volID) {
1794 if (statep->state == vl_online)
1797 for (found = 0,tsrp = statep->serversp; tsrp; tsrp=tsrp->next) {
1798 if (tsrp->server == scp->cbServerp)
1800 if (tsrp->server->downTime > *downTime)
1801 *downTime = tsrp->server->downTime;
1804 /* if the cbServerp does not match the current volume server list
1805 * we report the callback server as up so the callback can be
1808 return(found ? 0 : 1);
1811 /* called periodically by cm_daemon to shut down use of expired callbacks */
1812 void cm_CheckCBExpiration(void)
1816 time_t now, downTime;
1818 osi_Log0(afsd_logp, "CheckCBExpiration");
1821 lock_ObtainWrite(&cm_scacheLock);
1822 for (i=0; i<cm_data.scacheHashTableSize; i++) {
1823 for (scp = cm_data.scacheHashTablep[i]; scp; scp=scp->nextp) {
1825 if (scp->cbServerp && scp->cbExpires > 0 && now > scp->cbExpires &&
1826 (cm_CBServersUp(scp, &downTime) || downTime == 0 || downTime >= scp->cbExpires))
1828 cm_HoldSCacheNoLock(scp);
1829 lock_ReleaseWrite(&cm_scacheLock);
1831 osi_Log4(afsd_logp, "Callback Expiration Discarding SCache scp 0x%p vol %u vn %u uniq %u",
1832 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1833 lock_ObtainMutex(&scp->mx);
1834 cm_DiscardSCache(scp);
1835 lock_ReleaseMutex(&scp->mx);
1836 cm_CallbackNotifyChange(scp);
1838 cm_ReleaseSCacheNoLock(scp);
1839 lock_ObtainWrite(&cm_scacheLock);
1843 lock_ReleaseWrite(&cm_scacheLock);
1845 osi_Log0(afsd_logp, "CheckCBExpiration Complete");
1850 cm_GiveUpAllCallbacks(cm_server_t *tsp, afs_int32 markDown)
1854 struct rx_connection * rxconnp;
1856 if ((tsp->type == CM_SERVER_FILE) && !(tsp->flags & CM_SERVERFLAG_DOWN))
1858 code = cm_ConnByServer(tsp, cm_rootUserp, &connp);
1860 rxconnp = cm_GetRxConn(connp);
1861 rx_SetConnDeadTime(rxconnp, 10);
1862 code = RXAFS_GiveUpAllCallBacks(rxconnp);
1863 rx_SetConnDeadTime(rxconnp, ConnDeadtimeout);
1864 rx_PutConnection(rxconnp);
1868 cm_server_vols_t * tsrvp;
1872 lock_ObtainMutex(&tsp->mx);
1873 if (!(tsp->flags & CM_SERVERFLAG_DOWN)) {
1874 tsp->flags |= CM_SERVERFLAG_DOWN;
1875 tsp->downTime = osi_Time();
1877 cm_ForceNewConnections(tsp);
1878 lock_ReleaseMutex(&tsp->mx);
1880 /* Now update the volume status */
1881 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
1882 for (i=0; i<NUM_SERVER_VOLS; i++) {
1883 if (tsrvp->ids[i] != 0) {
1888 code = cm_GetVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
1889 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE, &volp);
1891 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
1902 cm_GiveUpAllCallbacksAllServers(afs_int32 markDown)
1906 lock_ObtainWrite(&cm_serverLock);
1907 for (tsp = cm_allServersp; tsp; tsp = tsp->allNextp) {
1908 cm_GetServerNoLock(tsp);
1909 lock_ReleaseWrite(&cm_serverLock);
1910 cm_GiveUpAllCallbacks(tsp, markDown);
1911 lock_ObtainWrite(&cm_serverLock);
1912 cm_PutServerNoLock(tsp);
1914 lock_ReleaseWrite(&cm_serverLock);