2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
10 #include <afsconfig.h>
11 #include <afs/param.h>
14 #include <afs/afs_args.h>
26 #include <rx_pthread.h>
28 #include <WINNT/syscfg.h>
29 #include <WINNT/afsreg.h>
32 SRXAFSCB_InitCallBackState3(struct rx_call *callp, afsUUID* serverUuid);
34 /* read/write lock for all global storage in this module */
35 osi_rwlock_t cm_callbackLock;
37 afs_int32 cm_OfflineROIsValid = 0;
39 afs_int32 cm_giveUpAllCBs = 1;
41 afs_int32 cm_shutdown = 0;
43 #ifdef AFS_FREELANCE_CLIENT
44 extern osi_mutex_t cm_Freelance_Lock;
47 /* count of # of callback breaking messages received by this CM so far. We use
48 * this count in determining whether there have been any callback breaks that
49 * apply to a call that returned a new callback. If the counter doesn't
50 * increase during a call, then we know that no callbacks were broken during
51 * that call, and thus that the callback that was just returned is still valid.
53 long cm_callbackCount;
55 /* count of number of RPCs potentially returning a callback executing now.
56 * When this counter hits zero, we can clear out the racing revokes list, since
57 * at that time, we know that none of the just-executed callback revokes will
58 * apply to any future call that returns a callback (since the latter hasn't
59 * even started execution yet).
61 long cm_activeCallbackGrantingCalls;
63 /* list of callbacks that have been broken recently. If a call returning a
64 * callback is executing and a callback revoke runs immediately after it at the
65 * server, the revoke may end up being processed before the response to the
66 * original callback granting call. We detect this by keeping a list of
67 * callback revokes that have been received since we *started* the callback
68 * granting call, and discarding any callbacks received for the same file ID,
69 * even if the callback revoke was received before the callback grant.
71 cm_racingRevokes_t *cm_racingRevokesp;
73 /* record a (potentially) racing revoke for this file ID; null means for all
74 * file IDs, and is used by InitCallBackState.
76 * The cancelFlags describe whether we're just discarding callbacks for the same
77 * file ID, the same volume, or all from the same server.
79 * Called with no locks held.
81 void cm_RecordRacingRevoke(cm_fid_t *fidp, long cancelFlags)
83 cm_racingRevokes_t *rp;
85 lock_ObtainWrite(&cm_callbackLock);
87 osi_Log3(afsd_logp, "RecordRacingRevoke Volume %d Flags %lX activeCalls %d",
88 fidp ? fidp->volume : 0, cancelFlags, cm_activeCallbackGrantingCalls);
90 if (cm_activeCallbackGrantingCalls > 0) {
91 rp = malloc(sizeof(*rp));
92 memset(rp, 0, sizeof(*rp));
93 osi_QAdd((osi_queue_t **) &cm_racingRevokesp, &rp->q);
94 rp->flags |= (cancelFlags & CM_RACINGFLAG_ALL);
95 if (fidp) rp->fid = *fidp;
96 rp->callbackCount = ++cm_callbackCount;
98 lock_ReleaseWrite(&cm_callbackLock);
102 * When we lose a callback, may have to send change notification replies.
103 * Do not call with a lock on the scp.
105 void cm_CallbackNotifyChange(cm_scache_t *scp)
111 /* why does this have to query the registry each time? */
112 if (RegOpenKeyEx( HKEY_LOCAL_MACHINE,
113 AFSREG_CLT_OPENAFS_SUBKEY,
115 KEY_READ|KEY_QUERY_VALUE,
116 &hKey) == ERROR_SUCCESS) {
118 dummyLen = sizeof(DWORD);
119 RegQueryValueEx(hKey, "CallBack Notify Change Delay", NULL, NULL,
120 (BYTE *) &dwDelay, &dummyLen);
124 if (dwDelay > 5000) /* do not allow a delay of more then 5 seconds */
127 osi_Log3(afsd_logp, "CallbackNotifyChange FileType %d Flags %lX Delay %dms",
128 scp->fileType, scp->flags, dwDelay);
133 /* for directories, this sends a change notification on the dir itself */
134 if (scp->fileType == CM_SCACHETYPE_DIRECTORY) {
135 if (scp->flags & CM_SCACHEFLAG_ANYWATCH)
137 FILE_NOTIFY_GENERIC_DIRECTORY_FILTER,
138 scp, NULL, NULL, TRUE);
140 /* and for files, this sends a change notification on the file's parent dir */
144 cm_SetFid(&tfid, scp->fid.cell, scp->fid.volume, scp->parentVnode, scp->parentUnique);
145 dscp = cm_FindSCache(&tfid);
147 dscp->flags & CM_SCACHEFLAG_ANYWATCH )
149 FILE_NOTIFY_GENERIC_FILE_FILTER,
150 dscp, NULL, NULL, TRUE);
152 cm_ReleaseSCache(dscp);
156 /* called with no locks held for every file ID that is revoked directly by
157 * a callback revoke call. Does not have to handle volume callback breaks,
158 * since those have already been split out.
160 * The callp parameter is currently unused.
162 void cm_RevokeCallback(struct rx_call *callp, cm_cell_t * cellp, AFSFid *fidp)
168 tfid.cell = cellp ? cellp->cellID : 0;
169 tfid.volume = fidp->Volume;
170 tfid.vnode = fidp->Vnode;
171 tfid.unique = fidp->Unique;
172 CM_FID_GEN_HASH(&tfid);
173 hash = CM_SCACHE_HASH(&tfid);
175 osi_Log3(afsd_logp, "RevokeCallback vol %u vn %u uniq %u",
176 fidp->Volume, fidp->Vnode, fidp->Unique);
178 /* do this first, so that if we're executing a callback granting call
179 * at this moment, we kill it before it can be merged in. Otherwise,
180 * it could complete while we're doing the scan below, and get missed
181 * by both the scan and by this code.
183 cm_RecordRacingRevoke(&tfid, 0);
185 lock_ObtainWrite(&cm_scacheLock);
186 /* do all in the hash bucket, since we don't know how many we'll find with
189 for (scp = cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
190 if (scp->fid.volume == tfid.volume &&
191 scp->fid.vnode == tfid.vnode &&
192 scp->fid.unique == tfid.unique &&
193 (cellp == NULL || scp->fid.cell == cellp->cellID) &&
194 cm_HaveCallback(scp))
196 cm_HoldSCacheNoLock(scp);
197 lock_ReleaseWrite(&cm_scacheLock);
198 osi_Log4(afsd_logp, "RevokeCallback Discarding SCache scp 0x%p vol %u vn %u uniq %u",
199 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
201 lock_ObtainWrite(&scp->rw);
202 cm_DiscardSCache(scp);
203 lock_ReleaseWrite(&scp->rw);
206 RDR_InvalidateObject(scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique,
207 scp->fid.hash, scp->fileType, AFS_INVALIDATE_CALLBACK);
209 cm_CallbackNotifyChange(scp);
211 lock_ObtainWrite(&cm_scacheLock);
212 cm_ReleaseSCacheNoLock(scp);
215 lock_ReleaseWrite(&cm_scacheLock);
217 osi_Log3(afsd_logp, "RevokeCallback Complete vol %u vn %u uniq %u",
218 fidp->Volume, fidp->Vnode, fidp->Unique);
222 cm_callbackDiscardROVolumeByFID(cm_fid_t *fidp)
224 cm_volume_t *volp = cm_GetVolumeByFID(fidp);
227 if (volp->cbExpiresRO) {
228 volp->cbExpiresRO = 0;
229 volp->cbIssuedRO = 0;
230 volp->volumeSizeRO = 0;
231 _InterlockedAnd(&volp->flags, ~CM_VOLUMEFLAG_RO_SIZE_VALID);
232 if (volp->cbServerpRO) {
233 cm_PutServer(volp->cbServerpRO);
234 volp->cbServerpRO = NULL;
236 volp->creationDateRO = 0;
241 /* called to revoke a volume callback, which is typically issued when a volume
242 * is moved from one server to another.
244 * Called with no locks held.
246 void cm_RevokeVolumeCallback(struct rx_call *callp, cm_cell_t *cellp, AFSFid *fidp)
252 osi_Log1(afsd_logp, "RevokeVolumeCallback vol %u", fidp->Volume);
254 /* do this first, so that if we're executing a callback granting call
255 * at this moment, we kill it before it can be merged in. Otherwise,
256 * it could complete while we're doing the scan below, and get missed
257 * by both the scan and by this code.
259 tfid.cell = cellp ? cellp->cellID : 0;
260 tfid.volume = fidp->Volume;
261 tfid.vnode = tfid.unique = 0;
262 cm_RecordRacingRevoke(&tfid, CM_RACINGFLAG_CANCELVOL);
264 lock_ObtainWrite(&cm_scacheLock);
265 for (hash = 0; hash < cm_data.scacheHashTableSize; hash++) {
266 for(scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
267 if (scp->fid.volume == fidp->Volume &&
268 (cellp == NULL || scp->fid.cell == cellp->cellID) &&
269 scp->cbExpires > 0 &&
270 scp->cbServerp != NULL) {
271 cm_HoldSCacheNoLock(scp);
272 lock_ReleaseWrite(&cm_scacheLock);
274 lock_ObtainWrite(&scp->rw);
275 osi_Log5(afsd_logp, "RevokeVolumeCallback Discarding SCache scp 0x%p vol %u vn %u uniq %u",
276 scp, scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
277 osi_Log2(afsd_logp, ".... dv 0x%x:%x",
278 (afs_uint32)((scp->dataVersion >> 32) & 0xFFFFFFFF),
279 (afs_uint32)(scp->dataVersion & 0xFFFFFFFF));
281 cm_DiscardSCache(scp);
282 lock_ReleaseWrite(&scp->rw);
285 RDR_InvalidateObject(scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique,
286 scp->fid.hash, scp->fileType, AFS_INVALIDATE_CALLBACK);
288 cm_CallbackNotifyChange(scp);
289 lock_ObtainWrite(&cm_scacheLock);
290 cm_ReleaseSCacheNoLock(scp);
291 if (scp->flags & CM_SCACHEFLAG_PURERO)
292 cm_callbackDiscardROVolumeByFID(&scp->fid);
294 } /* search one hash bucket */
295 } /* search all hash buckets */
297 lock_ReleaseWrite(&cm_scacheLock);
299 if (cellp && RDR_Initialized)
300 RDR_InvalidateVolume(cellp->cellID, fidp->Volume, AFS_INVALIDATE_CALLBACK);
302 osi_Log1(afsd_logp, "RevokeVolumeCallback Complete vol %d", fidp->Volume);
306 * afs_data_pointer_to_int32() - returns least significant afs_int32 of the
307 * given data pointer, without triggering "cast truncates pointer"
308 * warnings. We use this where we explicitly don't care whether a
309 * pointer is truncated -- it loses information where a pointer is
310 * larger than an afs_int32.
314 afs_data_pointer_to_int32(const void *p)
317 afs_int32 i32[sizeof(void *) / sizeof(afs_int32)];
321 int i32_sub; /* subscript of least significant afs_int32 in ip.i32[] */
326 /* used to determine the byte order of the system */
329 char c[sizeof(int) / sizeof(char)];
335 /* little-endian system */
338 /* big-endian system */
339 i32_sub = (sizeof ip.i32 / sizeof ip.i32[0]) - 1;
344 return ip.i32[i32_sub];
346 /*------------------------------------------------------------------------
347 * EXPORTED SRXAFSCB_CallBack
350 * Routine called by the server-side callback RPC interface to
351 * implement passing in callback information.
355 * rx_call : Ptr to Rx call on which this request came in.
356 * fidsArrayp : Ptr to array of fids involved.
357 * cbsArrayp : Ptr to matching callback info for the fids.
363 * Nothing interesting.
367 *------------------------------------------------------------------------*/
368 /* handle incoming RPC callback breaking message.
369 * Called with no locks held.
372 SRXAFSCB_CallBack(struct rx_call *callp, AFSCBFids *fidsArrayp, AFSCBs *cbsArrayp)
376 struct rx_connection *connp;
377 struct rx_peer *peerp;
378 unsigned long host = 0;
379 unsigned short port = 0;
380 cm_server_t *tsp = NULL;
381 cm_cell_t* cellp = NULL;
386 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
387 host = rx_HostOf(peerp);
388 port = rx_PortOf(peerp);
390 tsp = cm_FindServerByIP(host, port, CM_SERVER_FILE, FALSE);
397 osi_Log2(afsd_logp, "SRXAFSCB_CallBack from host 0x%x port %d",
401 osi_Log3(afsd_logp, "SRXAFSCB_CallBack from host 0x%x port %d for cell %s",
404 cellp->name /* does not need to be saved, doesn't change */);
406 osi_Log0(afsd_logp, "SRXAFSCB_CallBack from unknown host");
410 for (i=0; i < (long) fidsArrayp->AFSCBFids_len; i++) {
411 tfidp = &fidsArrayp->AFSCBFids_val[i];
413 if (tfidp->Volume == 0)
414 continue; /* means don't do anything */
415 else if (tfidp->Vnode == 0)
416 cm_RevokeVolumeCallback(callp, cellp, tfidp);
418 cm_RevokeCallback(callp, cellp, tfidp);
423 /*------------------------------------------------------------------------
424 * EXPORTED SRXAFSCB_InitCallBackState
427 * Routine called by the server-side callback RPC interface to
428 * implement clearing all callbacks from this host.
431 * rx_call : Ptr to Rx call on which this request came in.
437 * Nothing interesting.
441 *------------------------------------------------------------------------*/
442 /* called with no locks by RPC system when a server indicates that it has never
443 * heard from us, or for other reasons has had to discard callbacks from us
444 * without telling us, e.g. a network partition.
447 SRXAFSCB_InitCallBackState(struct rx_call *callp)
452 osi_Log0(afsd_logp, "SRXAFSCB_InitCallBackState ->");
454 return SRXAFSCB_InitCallBackState3(callp, NULL);
457 /*------------------------------------------------------------------------
458 * EXPORTED SRXAFSCB_Probe
461 * Routine called by the server-side callback RPC interface to
462 * implement ``probing'' the Cache Manager, just making sure it's
466 * rx_call : Ptr to Rx call on which this request came in.
472 * Nothing interesting.
476 *------------------------------------------------------------------------*/
478 SRXAFSCB_Probe(struct rx_call *callp)
480 struct rx_connection *connp;
481 struct rx_peer *peerp;
482 unsigned long host = 0;
483 unsigned short port = 0;
488 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
489 host = rx_HostOf(peerp);
490 port = rx_PortOf(peerp);
493 osi_Log2(afsd_logp, "SRXAFSCB_Probe from host 0x%x port %d",
500 /*------------------------------------------------------------------------
501 * EXPORTED SRXAFSCB_GetLock
504 * Routine called by the server-side callback RPC interface to
505 * implement pulling out the contents of a lock in the lock
509 * a_call : Ptr to Rx call on which this request came in.
510 * a_index : Index of desired lock.
511 * a_result : Ptr to a buffer for the given lock.
514 * 0 if everything went fine,
515 * 1 if we were given a bad index.
518 * Nothing interesting.
522 *------------------------------------------------------------------------*/
523 /* debug interface */
525 extern osi_rwlock_t cm_aclLock;
526 extern osi_rwlock_t buf_globalLock;
527 extern osi_rwlock_t cm_cellLock;
528 extern osi_rwlock_t cm_connLock;
529 extern osi_rwlock_t cm_dnlcLock;
530 extern osi_rwlock_t cm_scacheLock;
531 extern osi_rwlock_t cm_serverLock;
532 extern osi_rwlock_t cm_syscfgLock;
533 extern osi_rwlock_t cm_userLock;
534 extern osi_rwlock_t cm_utilsLock;
535 extern osi_rwlock_t cm_volumeLock;
536 extern osi_rwlock_t smb_globalLock;
537 extern osi_rwlock_t smb_rctLock;
539 extern osi_mutex_t cm_Freelance_Lock;
540 extern osi_mutex_t cm_Afsdsbmt_Lock;
541 extern osi_mutex_t tokenEventLock;
542 extern osi_mutex_t smb_ListenerLock;
543 extern osi_mutex_t smb_RawBufLock;
544 extern osi_mutex_t smb_Dir_Watch_Lock;
546 #define LOCKTYPE_RW 1
547 #define LOCKTYPE_MUTEX 2
548 static struct _ltable {
553 {"cm_scacheLock", (char*)&cm_scacheLock, LOCKTYPE_RW},
554 {"buf_globalLock", (char*)&buf_globalLock, LOCKTYPE_RW},
555 {"cm_serverLock", (char*)&cm_serverLock, LOCKTYPE_RW},
556 {"cm_callbackLock", (char*)&cm_callbackLock, LOCKTYPE_RW},
557 {"cm_syscfgLock", (char*)&cm_syscfgLock, LOCKTYPE_RW},
558 {"cm_aclLock", (char*)&cm_aclLock, LOCKTYPE_RW},
559 {"cm_cellLock", (char*)&cm_cellLock, LOCKTYPE_RW},
560 {"cm_connLock", (char*)&cm_connLock, LOCKTYPE_RW},
561 {"cm_userLock", (char*)&cm_userLock, LOCKTYPE_RW},
562 {"cm_volumeLock", (char*)&cm_volumeLock, LOCKTYPE_RW},
563 {"cm_dnlcLock", (char*)&cm_dnlcLock, LOCKTYPE_RW},
564 {"cm_utilsLock", (char*)&cm_utilsLock, LOCKTYPE_RW},
565 {"smb_globalLock", (char*)&smb_globalLock, LOCKTYPE_RW},
566 {"smb_rctLock", (char*)&smb_rctLock, LOCKTYPE_RW},
567 {"cm_Freelance_Lock",(char*)&cm_Freelance_Lock, LOCKTYPE_MUTEX},
568 {"cm_Afsdsbmt_Lock", (char*)&cm_Afsdsbmt_Lock, LOCKTYPE_MUTEX},
569 {"tokenEventLock", (char*)&tokenEventLock, LOCKTYPE_MUTEX},
570 {"smb_ListenerLock", (char*)&smb_ListenerLock, LOCKTYPE_MUTEX},
571 {"smb_RawBufLock", (char*)&smb_RawBufLock, LOCKTYPE_MUTEX},
572 {"smb_Dir_Watch_Lock",(char*)&smb_Dir_Watch_Lock, LOCKTYPE_MUTEX}
576 SRXAFSCB_GetLock(struct rx_call *callp, long index, AFSDBLock *lockp)
578 struct _ltable *tl; /*Ptr to lock table entry */
581 int nentries; /*Num entries in table */
582 int code; /*Return code */
583 struct rx_connection *connp;
584 struct rx_peer *peerp;
585 unsigned long host = 0;
586 unsigned short port = 0;
591 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
592 host = rx_HostOf(peerp);
593 port = rx_PortOf(peerp);
596 osi_Log3(afsd_logp, "SRXAFSCB_GetLock(%d) from host 0x%x port %d",
597 index, ntohl(host), ntohs(port));
599 nentries = sizeof(ltable) / sizeof(struct _ltable);
600 if (index < 0 || index >= nentries) {
607 * Found it - copy out its contents.
610 strncpy(lockp->name, tl->name, sizeof(lockp->name));
611 lockp->name[sizeof(lockp->name)-1] = '\0';
612 lockp->lock.waitStates = 0;
613 switch ( tl->type ) {
615 rwp = (osi_rwlock_t *)tl->addr;
616 lockp->lock.exclLocked = rwp->flags;
617 lockp->lock.readersReading = rwp->readers;
618 lockp->lock.numWaiting = rwp->waiters;
621 mtxp = (osi_mutex_t *)tl->addr;
622 lockp->lock.exclLocked = mtxp->flags;
623 lockp->lock.readersReading = 0;
624 lockp->lock.numWaiting = mtxp->waiters;
627 lockp->lock.pid_last_reader = 0;
628 lockp->lock.pid_writer = 0;
629 lockp->lock.src_indicator = 0;
636 /* debug interface */
638 SRXAFSCB_GetCE(struct rx_call *callp, long index, AFSDBCacheEntry *cep)
643 struct rx_connection *connp;
644 struct rx_peer *peerp;
645 unsigned long host = 0;
646 unsigned short port = 0;
651 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
652 host = rx_HostOf(peerp);
653 port = rx_PortOf(peerp);
656 osi_Log2(afsd_logp, "SRXAFSCB_GetCE from host 0x%x port %d",
657 ntohl(host), ntohs(port));
659 lock_ObtainRead(&cm_scacheLock);
660 for (i = 0; i < cm_data.scacheHashTableSize; i++) {
661 for (scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp) {
665 } /*Zip through current hash chain */
666 } /*Zip through hash chains */
676 * Copy out the located entry.
678 memset(cep, 0, sizeof(AFSDBCacheEntry));
679 cep->addr = afs_data_pointer_to_int32(scp);
680 cep->cell = scp->fid.cell;
681 cep->netFid.Volume = scp->fid.volume;
682 cep->netFid.Vnode = scp->fid.vnode;
683 cep->netFid.Unique = scp->fid.unique;
684 cep->lock.waitStates = 0;
685 cep->lock.exclLocked = scp->rw.flags;
686 cep->lock.readersReading = 0;
687 cep->lock.numWaiting = scp->rw.waiters;
688 cep->lock.pid_last_reader = 0;
689 cep->lock.pid_writer = 0;
690 cep->lock.src_indicator = 0;
691 cep->Length = scp->length.LowPart;
692 cep->DataVersion = (afs_uint32)(scp->dataVersion & 0xFFFFFFFF);
693 cep->callback = afs_data_pointer_to_int32(scp->cbServerp);
694 if (scp->flags & CM_SCACHEFLAG_PURERO) {
695 cm_volume_t *volp = cm_GetVolumeByFID(&scp->fid);
697 cep->cbExpires = volp->cbExpiresRO;
701 /* TODO: deal with time_t below */
702 cep->cbExpires = (afs_int32) scp->cbExpires;
704 cep->refCount = scp->refCount;
705 cep->opens = scp->openReads;
706 cep->writers = scp->openWrites;
707 switch (scp->fileType) {
708 case CM_SCACHETYPE_FILE:
711 case CM_SCACHETYPE_MOUNTPOINT:
714 case CM_SCACHETYPE_DIRECTORY:
715 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
720 case CM_SCACHETYPE_SYMLINK:
723 case CM_SCACHETYPE_DFSLINK:
726 case CM_SCACHETYPE_INVALID:
731 if (cm_HaveCallback(scp))
733 if (scp->flags & CM_SCACHEFLAG_RO || scp->flags & CM_SCACHEFLAG_PURERO)
735 if (scp->fileType == CM_SCACHETYPE_MOUNTPOINT &&
736 scp->mpDataVersion == scp->dataVersion)
738 if (!osi_QIsEmpty(&scp->waitQueueH))
743 * Return our results.
746 lock_ReleaseRead(&cm_scacheLock);
751 /* debug interface */
753 SRXAFSCB_GetCE64(struct rx_call *callp, long index, AFSDBCacheEntry64 *cep)
758 struct rx_connection *connp;
759 struct rx_peer *peerp;
760 unsigned long host = 0;
761 unsigned short port = 0;
766 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
767 host = rx_HostOf(peerp);
768 port = rx_PortOf(peerp);
771 osi_Log2(afsd_logp, "SRXAFSCB_GetCE64 from host 0x%x port %d",
772 ntohl(host), ntohs(port));
774 lock_ObtainRead(&cm_scacheLock);
775 for (i = 0; i < cm_data.scacheHashTableSize; i++) {
776 for (scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp) {
780 } /*Zip through current hash chain */
781 } /*Zip through hash chains */
791 * Copy out the located entry.
793 memset(cep, 0, sizeof(AFSDBCacheEntry64));
794 cep->addr = afs_data_pointer_to_int32(scp);
795 cep->cell = scp->fid.cell;
796 cep->netFid.Volume = scp->fid.volume;
797 cep->netFid.Vnode = scp->fid.vnode;
798 cep->netFid.Unique = scp->fid.unique;
799 cep->lock.waitStates = 0;
800 cep->lock.exclLocked = scp->rw.flags;
801 cep->lock.readersReading = 0;
802 cep->lock.numWaiting = scp->rw.waiters;
803 cep->lock.pid_last_reader = 0;
804 cep->lock.pid_writer = 0;
805 cep->lock.src_indicator = 0;
806 cep->Length = (afs_int64) scp->length.QuadPart;
807 cep->DataVersion = (afs_uint32)(scp->dataVersion & 0xFFFFFFFF);
808 cep->callback = afs_data_pointer_to_int32(scp->cbServerp);
809 if (scp->flags & CM_SCACHEFLAG_PURERO) {
810 cm_volume_t *volp = cm_GetVolumeByFID(&scp->fid);
812 cep->cbExpires = volp->cbExpiresRO;
816 /* TODO: handle time_t */
817 cep->cbExpires = (afs_int32) scp->cbExpires;
819 cep->refCount = scp->refCount;
820 cep->opens = scp->openReads;
821 cep->writers = scp->openWrites;
822 switch (scp->fileType) {
823 case CM_SCACHETYPE_FILE:
826 case CM_SCACHETYPE_MOUNTPOINT:
829 case CM_SCACHETYPE_DIRECTORY:
830 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
835 case CM_SCACHETYPE_SYMLINK:
838 case CM_SCACHETYPE_DFSLINK:
841 case CM_SCACHETYPE_INVALID:
846 if (cm_HaveCallback(scp))
848 if (scp->flags & CM_SCACHEFLAG_RO || scp->flags & CM_SCACHEFLAG_PURERO)
850 if (scp->fileType == CM_SCACHETYPE_MOUNTPOINT &&
851 scp->mpDataVersion == scp->dataVersion)
853 if (!osi_QIsEmpty(&scp->waitQueueH))
858 * Return our results.
861 lock_ReleaseRead(&cm_scacheLock);
866 /* debug interface: not implemented */
868 SRXAFSCB_XStatsVersion(struct rx_call *callp, long *vp)
870 struct rx_connection *connp;
871 struct rx_peer *peerp;
872 unsigned long host = 0;
873 unsigned short port = 0;
878 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
879 host = rx_HostOf(peerp);
880 port = rx_PortOf(peerp);
883 osi_Log2(afsd_logp, "SRXAFSCB_XStatsVersion from host 0x%x port %d - not implemented",
884 ntohl(host), ntohs(port));
890 /* debug interface: not implemented */
892 SRXAFSCB_GetXStats(struct rx_call *callp, long cvn, long coln, long *srvp, long *timep,
893 AFSCB_CollData *datap)
895 struct rx_connection *connp;
896 struct rx_peer *peerp;
897 unsigned long host = 0;
898 unsigned short port = 0;
903 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
904 host = rx_HostOf(peerp);
905 port = rx_PortOf(peerp);
908 osi_Log2(afsd_logp, "SRXAFSCB_GetXStats from host 0x%x port %d - not implemented",
909 ntohl(host), ntohs(port));
915 SRXAFSCB_InitCallBackState2(struct rx_call *callp, struct interfaceAddr* addr)
920 osi_Log0(afsd_logp, "SRXAFSCB_InitCallBackState2 ->");
922 return SRXAFSCB_InitCallBackState3(callp, NULL);
925 /* debug interface */
927 SRXAFSCB_WhoAreYou(struct rx_call *callp, struct interfaceAddr* addr)
931 struct rx_connection *connp;
932 struct rx_peer *peerp;
933 unsigned long host = 0;
934 unsigned short port = 0;
939 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
940 host = rx_HostOf(peerp);
941 port = rx_PortOf(peerp);
944 osi_Log2(afsd_logp, "SRXAFSCB_WhoAreYou from host 0x%x port %d",
948 lock_ObtainRead(&cm_syscfgLock);
949 if (cm_LanAdapterChangeDetected) {
950 lock_ConvertRToW(&cm_syscfgLock);
951 if (cm_LanAdapterChangeDetected) {
952 /* get network related info */
953 cm_noIPAddr = CM_MAXINTERFACE_ADDR;
954 code = syscfg_GetIFInfo(&cm_noIPAddr,
955 cm_IPAddr, cm_SubnetMask,
956 cm_NetMtu, cm_NetFlags);
957 cm_LanAdapterChangeDetected = 0;
959 lock_ConvertWToR(&cm_syscfgLock);
962 /* return all network interface addresses */
963 addr->numberOfInterfaces = cm_noIPAddr;
964 addr->uuid = cm_data.Uuid;
965 for ( i=0; i < cm_noIPAddr; i++ ) {
966 addr->addr_in[i] = cm_IPAddr[i];
967 addr->subnetmask[i] = cm_SubnetMask[i];
968 addr->mtu[i] = (rx_mtu == -1 || (rx_mtu != -1 && cm_NetMtu[i] < rx_mtu)) ?
969 cm_NetMtu[i] : rx_mtu;
972 lock_ReleaseRead(&cm_syscfgLock);
978 SRXAFSCB_InitCallBackState3(struct rx_call *callp, afsUUID* serverUuid)
982 cm_server_t *tsp = NULL;
983 cm_scache_t *scp = NULL;
984 cm_cell_t* cellp = NULL;
988 afs_uint32 discardType;
989 struct rx_connection *connp;
990 struct rx_peer *peerp;
991 unsigned long host = 0;
992 unsigned short port = 0;
997 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
998 host = rx_HostOf(peerp);
999 port = rx_PortOf(peerp);
1002 if (UuidToString((UUID *)serverUuid, &p) == RPC_S_OK) {
1003 osi_Log1(afsd_logp, "SRXAFSCB_InitCallBackState3 Uuid%s ->",osi_LogSaveString(afsd_logp,p));
1007 tsp = cm_FindServerByUuid(serverUuid, CM_SERVER_FILE, FALSE);
1010 tsp = cm_FindServerByIP(host, port, CM_SERVER_FILE, FALSE);
1017 osi_Log2(afsd_logp, "SRXAFSCB_InitCallBackState3 from host 0x%x port %d",
1021 osi_Log3(afsd_logp, "SRXAFSCB_InitCallBackState3 from host 0x%x port %d for cell %s",
1024 cellp->name /* does not need to be saved, doesn't change */);
1026 osi_Log0(afsd_logp, "SRXAFSCB_InitCallBackState3 from unknown host");
1029 if (connp && peerp) {
1030 tsp = cm_FindServerByIP(host, port, CM_SERVER_FILE, FALSE);
1032 osi_Log1(afsd_logp, "InitCallbackState3 server %x", tsp);
1034 /* record the callback in the racing revokes structure. This
1035 * shouldn't be necessary, since we shouldn't be making callback
1036 * granting calls while we're going to get an initstate call,
1037 * but there probably are some obscure races, so better safe
1040 * We do this first since we don't hold the cm_scacheLock and vnode
1041 * locks over the entire callback scan operation below. The
1042 * big loop below is guaranteed to hit any callback already
1043 * processed. The call to RecordRacingRevoke is guaranteed
1044 * to kill any callback that is currently being returned.
1045 * Anything that sneaks past both must start
1046 * after the call to RecordRacingRevoke.
1051 fid.cell = cellp->cellID;
1052 fid.volume = fid.vnode = fid.unique = 0;
1054 cm_RecordRacingRevoke(&fid, CM_RACINGFLAG_CANCELALL);
1056 cm_RecordRacingRevoke(NULL, CM_RACINGFLAG_CANCELALL);
1059 /* now search all vnodes looking for guys with this callback, if we
1060 * found it, or guys with any callbacks, if we didn't find the server
1061 * (that's how multihomed machines will appear and how we'll handle
1062 * them, albeit a little inefficiently). That is, we're discarding all
1063 * callbacks from all hosts if we get an initstate call from an unknown
1064 * host. Since these calls are rare, and multihomed servers
1065 * are "rare," hopefully this won't be a problem.
1067 lock_ObtainWrite(&cm_scacheLock);
1068 for (hash = 0; hash < cm_data.scacheHashTableSize; hash++) {
1069 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
1070 if (scp->cbExpires > 0 && scp->cbServerp != NULL) {
1071 cm_HoldSCacheNoLock(scp);
1072 lock_ReleaseWrite(&cm_scacheLock);
1074 lock_ObtainWrite(&scp->rw);
1075 if (scp->cbExpires > 0 && scp->cbServerp != NULL) {
1076 /* we have a callback, now decide if we should clear it */
1077 if (cm_ServerEqual(scp->cbServerp, tsp)) {
1078 osi_Log4(afsd_logp, "InitCallbackState3 Discarding SCache scp 0x%p vol %u vn %u uniq %u",
1079 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1080 discardFid = scp->fid;
1081 discardType = scp->fileType;
1082 cm_DiscardSCache(scp);
1086 lock_ReleaseWrite(&scp->rw);
1088 cm_CallbackNotifyChange(scp);
1089 if (RDR_Initialized)
1090 RDR_InvalidateObject(discardFid.cell, discardFid.volume, discardFid.vnode, discardFid.unique,
1091 discardFid.hash, discardType, AFS_INVALIDATE_EXPIRED);
1093 lock_ObtainWrite(&cm_scacheLock);
1094 cm_ReleaseSCacheNoLock(scp);
1096 if (discarded && (scp->flags & CM_SCACHEFLAG_PURERO))
1097 cm_callbackDiscardROVolumeByFID(&scp->fid);
1099 } /* search one hash bucket */
1100 } /* search all hash buckets */
1102 lock_ReleaseWrite(&cm_scacheLock);
1105 /* reset the No flags on the server */
1106 cm_SetServerNo64Bit(tsp, 0);
1107 cm_SetServerNoInlineBulk(tsp, 0);
1109 /* we're done with the server structure */
1116 /* debug interface */
1118 SRXAFSCB_ProbeUuid(struct rx_call *callp, afsUUID* clientUuid)
1120 struct rx_connection *connp;
1121 struct rx_peer *peerp;
1122 unsigned long host = 0;
1123 unsigned short port = 0;
1130 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1131 host = rx_HostOf(peerp);
1132 port = rx_PortOf(peerp);
1135 if ( !afs_uuid_equal(&cm_data.Uuid, clientUuid) ) {
1136 UuidToString((UUID *)&cm_data.Uuid, &p);
1137 UuidToString((UUID *)clientUuid, &q);
1138 osi_Log4(afsd_logp, "SRXAFSCB_ProbeUuid %s != %s from host 0x%x port %d",
1139 osi_LogSaveString(afsd_logp,p),
1140 osi_LogSaveString(afsd_logp,q),
1146 code = 1; /* failure */
1148 osi_Log2(afsd_logp, "SRXAFSCB_ProbeUuid (success) from host 0x%x port %d",
1155 /* debug interface */
1157 GetCellCommon(afs_int32 a_cellnum, char **a_name, serverList *a_hosts)
1161 cm_serverRef_t * serverRefp;
1164 cellp = cm_FindCellByID(a_cellnum, CM_FLAG_NOPROBE);
1166 *a_name = (char *)xdr_alloc(sizeof(char));
1172 lock_ObtainRead(&cm_serverLock);
1173 len = strlen(cellp->name)+1;
1174 *a_name = (char *)xdr_alloc(len);
1176 memcpy(*a_name, cellp->name, len);
1178 for ( sn = 0, serverRefp = cellp->vlServersp;
1179 sn < AFSMAXCELLHOSTS && serverRefp;
1180 sn++, serverRefp = serverRefp->next);
1182 a_hosts->serverList_len = sn;
1183 a_hosts->serverList_val = (afs_int32 *)xdr_alloc(sn * sizeof(afs_int32));
1185 for ( sn = 0, serverRefp = cellp->vlServersp;
1186 sn < AFSMAXCELLHOSTS && serverRefp;
1187 sn++, serverRefp = serverRefp->next)
1189 a_hosts->serverList_val[sn] = ntohl(serverRefp->server->addr.sin_addr.s_addr);
1192 lock_ReleaseRead(&cm_serverLock);
1196 /* debug interface */
1198 SRXAFSCB_GetCellByNum(struct rx_call *callp, afs_int32 a_cellnum,
1199 char **a_name, serverList *a_hosts)
1201 struct rx_connection *connp;
1202 struct rx_peer *peerp;
1203 unsigned long host = 0;
1204 unsigned short port = 0;
1210 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1211 host = rx_HostOf(peerp);
1212 port = rx_PortOf(peerp);
1215 osi_Log3(afsd_logp, "SRXAFSCB_GetCellByNum(%d) from host 0x%x port %d",
1216 a_cellnum, ntohl(host), ntohs(port));
1218 a_hosts->serverList_val = 0;
1219 a_hosts->serverList_len = 0;
1222 rc = GetCellCommon(a_cellnum, a_name, a_hosts);
1227 /* debug interface */
1229 SRXAFSCB_TellMeAboutYourself( struct rx_call *callp,
1230 struct interfaceAddr *addr,
1231 Capabilities * capabilities)
1234 afs_uint32 *dataBuffP;
1235 afs_int32 dataBytes;
1237 struct rx_connection *connp;
1238 struct rx_peer *peerp;
1239 unsigned long host = 0;
1240 unsigned short port = 0;
1245 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1246 host = rx_HostOf(peerp);
1247 port = rx_PortOf(peerp);
1250 osi_Log2(afsd_logp, "SRXAFSCB_TellMeAboutYourself from host 0x%x port %d",
1254 lock_ObtainRead(&cm_syscfgLock);
1255 if (cm_LanAdapterChangeDetected) {
1256 lock_ConvertRToW(&cm_syscfgLock);
1257 if (cm_LanAdapterChangeDetected) {
1258 /* get network related info */
1259 cm_noIPAddr = CM_MAXINTERFACE_ADDR;
1260 code = syscfg_GetIFInfo(&cm_noIPAddr,
1261 cm_IPAddr, cm_SubnetMask,
1262 cm_NetMtu, cm_NetFlags);
1263 cm_LanAdapterChangeDetected = 0;
1265 lock_ConvertWToR(&cm_syscfgLock);
1268 /* return all network interface addresses */
1269 addr->numberOfInterfaces = cm_noIPAddr;
1270 addr->uuid = cm_data.Uuid;
1271 for ( i=0; i < cm_noIPAddr; i++ ) {
1272 addr->addr_in[i] = cm_IPAddr[i];
1273 addr->subnetmask[i] = cm_SubnetMask[i];
1274 addr->mtu[i] = (rx_mtu == -1 || (rx_mtu != -1 && cm_NetMtu[i] < rx_mtu)) ?
1275 cm_NetMtu[i] : rx_mtu;
1277 lock_ReleaseRead(&cm_syscfgLock);
1279 dataBytes = 1 * sizeof(afs_uint32);
1280 dataBuffP = (afs_uint32 *) xdr_alloc(dataBytes);
1281 dataBuffP[0] = CLIENT_CAPABILITY_ERRORTRANS;
1282 capabilities->Capabilities_len = dataBytes / sizeof(afs_uint32);
1283 capabilities->Capabilities_val = dataBuffP;
1288 /*------------------------------------------------------------------------
1289 * EXPORTED SRXAFSCB_GetServerPrefs
1292 * Routine to list server preferences used by this client.
1295 * a_call : Ptr to Rx call on which this request came in.
1296 * a_index : Input server index
1297 * a_srvr_addr : Output server address (0xffffffff on last server)
1298 * a_srvr_rank : Output server rank
1304 * Nothing interesting.
1308 *------------------------------------------------------------------------*/
1310 int SRXAFSCB_GetServerPrefs(
1311 struct rx_call *callp,
1313 afs_int32 *a_srvr_addr,
1314 afs_int32 *a_srvr_rank)
1316 struct rx_connection *connp;
1317 struct rx_peer *peerp;
1318 unsigned long host = 0;
1319 unsigned short port = 0;
1324 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1325 host = rx_HostOf(peerp);
1326 port = rx_PortOf(peerp);
1329 osi_Log2(afsd_logp, "SRXAFSCB_GetServerPrefs from host 0x%x port %d - not implemented",
1333 *a_srvr_addr = 0xffffffff;
1334 *a_srvr_rank = 0xffffffff;
1339 /*------------------------------------------------------------------------
1340 * EXPORTED SRXAFSCB_GetCellServDB
1343 * Routine to list cells configured for this client
1346 * a_call : Ptr to Rx call on which this request came in.
1347 * a_index : Input cell index
1348 * a_name : Output cell name ("" on last cell)
1349 * a_hosts : Output cell database servers
1355 * Nothing interesting.
1359 *------------------------------------------------------------------------*/
1361 int SRXAFSCB_GetCellServDB(struct rx_call *callp, afs_int32 index, char **a_name,
1362 serverList *a_hosts)
1364 struct rx_connection *connp;
1365 struct rx_peer *peerp;
1366 unsigned long host = 0;
1367 unsigned short port = 0;
1373 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1374 host = rx_HostOf(peerp);
1375 port = rx_PortOf(peerp);
1378 osi_Log2(afsd_logp, "SRXAFSCB_GetCellServDB from host 0x%x port %d - not implemented",
1379 ntohl(host), ntohs(port));
1381 #ifdef AFS_FREELANCE_CLIENT
1382 if (cm_freelanceEnabled && index == 0) {
1383 rc = GetCellCommon(AFS_FAKE_ROOT_CELL_ID, a_name, a_hosts);
1387 rc = GetCellCommon(index+1, a_name, a_hosts);
1392 /*------------------------------------------------------------------------
1393 * EXPORTED SRXAFSCB_GetLocalCell
1396 * Routine to return name of client's local cell
1399 * a_call : Ptr to Rx call on which this request came in.
1400 * a_name : Output cell name
1406 * Nothing interesting.
1410 *------------------------------------------------------------------------*/
1412 int SRXAFSCB_GetLocalCell(struct rx_call *callp, char **a_name)
1415 struct rx_connection *connp;
1416 struct rx_peer *peerp;
1417 unsigned long host = 0;
1418 unsigned short port = 0;
1424 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1425 host = rx_HostOf(peerp);
1426 port = rx_PortOf(peerp);
1429 osi_Log2(afsd_logp, "SRXAFSCB_GetLocalCell from host 0x%x port %d",
1430 ntohl(host), ntohs(port));
1432 if (cm_data.rootCellp) {
1433 len = strlen(cm_data.rootCellp->name) + 1;
1434 t_name = (char *)xdr_alloc(len);
1436 memcpy(t_name, cm_data.rootCellp->name, len);
1438 t_name = (char *)xdr_alloc(1);
1448 * afs_MarshallCacheConfig - marshall client cache configuration
1452 * IN callerVersion - the rpc stat version of the caller.
1454 * IN config - client cache configuration.
1456 * OUT ptr - buffer where configuration is marshalled.
1462 static void afs_MarshallCacheConfig(
1463 afs_uint32 callerVersion,
1464 cm_initparams_v1 *config,
1468 * We currently only support version 1.
1470 *(ptr++) = config->nChunkFiles;
1471 *(ptr++) = config->nStatCaches;
1472 *(ptr++) = config->nDataCaches;
1473 *(ptr++) = config->nVolumeCaches;
1474 *(ptr++) = config->firstChunkSize;
1475 *(ptr++) = config->otherChunkSize;
1476 *(ptr++) = config->cacheSize;
1477 *(ptr++) = config->setTime;
1478 *(ptr++) = config->memCache;
1483 /*------------------------------------------------------------------------
1484 * EXPORTED SRXAFSCB_GetCacheConfig
1487 * Routine to return parameters used to initialize client cache.
1488 * Client may request any format version. Server may not return
1489 * format version greater than version requested by client.
1492 * a_call: Ptr to Rx call on which this request came in.
1493 * callerVersion: Data format version desired by the client.
1494 * serverVersion: Data format version of output data.
1495 * configCount: Number bytes allocated for output data.
1496 * config: Client cache configuration.
1502 * Nothing interesting.
1506 *------------------------------------------------------------------------*/
1508 int SRXAFSCB_GetCacheConfig(struct rx_call *callp,
1509 afs_uint32 callerVersion,
1510 afs_uint32 *serverVersion,
1511 afs_uint32 *configCount,
1512 cacheConfig *config)
1514 afs_uint32 *t_config;
1516 extern cm_initparams_v1 cm_initParams;
1517 struct rx_connection *connp;
1518 struct rx_peer *peerp;
1519 unsigned long host = 0;
1520 unsigned short port = 0;
1525 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1526 host = rx_HostOf(peerp);
1527 port = rx_PortOf(peerp);
1530 osi_Log2(afsd_logp, "SRXAFSCB_GetCacheConfig from host 0x%x port %d - version 1 only",
1531 ntohl(host), ntohs(port));
1534 * Currently only support version 1
1536 allocsize = sizeof(cm_initparams_v1);
1537 t_config = (afs_uint32 *)xdr_alloc(allocsize);
1539 afs_MarshallCacheConfig(callerVersion, &cm_initParams, t_config);
1541 *serverVersion = AFS_CLIENT_RETRIEVAL_FIRST_EDITION;
1544 #define SIZE_MAX UINT_MAX
1546 osi_assertx(allocsize < SIZE_MAX, "allocsize >= SIZE_MAX");
1548 *configCount = (afs_uint32)allocsize;
1549 config->cacheConfig_val = t_config;
1550 config->cacheConfig_len = (*configCount)/sizeof(afs_uint32);
1555 /* called by afsd without any locks to initialize this module */
1556 void cm_InitCallback(void)
1558 lock_InitializeRWLock(&cm_callbackLock, "cm_callbackLock", LOCK_HIERARCHY_CALLBACK_GLOBAL);
1559 cm_activeCallbackGrantingCalls = 0;
1562 /* called with locked scp; tells us whether we've got a callback.
1563 * Expirations are checked by a background daemon so as to make
1564 * this function as inexpensive as possible
1566 int cm_HaveCallback(cm_scache_t *scp)
1568 #ifdef AFS_FREELANCE_CLIENT
1569 if (cm_freelanceEnabled &&
1570 scp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
1571 scp->fid.volume==AFS_FAKE_ROOT_VOL_ID) {
1572 if (cm_getLocalMountPointChange()) {
1573 cm_clearLocalMountPointChange();
1574 lock_ReleaseWrite(&scp->rw);
1575 cm_reInitLocalMountPoints();
1576 lock_ObtainWrite(&scp->rw);
1578 return (cm_data.fakeDirVersion == scp->dataVersion);
1581 if (scp->cbServerp != NULL)
1584 if (scp->flags & CM_SCACHEFLAG_PURERO) {
1585 cm_volume_t *volp = cm_GetVolumeByFID(&scp->fid);
1588 if (cm_OfflineROIsValid) {
1589 switch (cm_GetVolumeStatus(volp, scp->fid.volume)) {
1597 if (cm_readonlyVolumeVersioning &&
1599 scp->volumeCreationDate != 0 &&
1600 volp->creationDateRO == scp->volumeCreationDate &&
1601 volp->cbServerpRO != NULL) {
1611 /* need to detect a broken callback that races with our obtaining a callback.
1612 * Need to be able to do this even if we don't know the file ID of the file
1613 * we're breaking the callback on at the time we start the acquisition of the
1614 * callback (as in the case where we are creating a file).
1616 * So, we start by writing down the count of the # of callbacks we've received
1617 * so far, and bumping a global counter of the # of callback granting calls
1618 * outstanding (all done under cm_callbackLock).
1620 * When we're back from the call, we look at all of the callback revokes with
1621 * counter numbers greater than the one we recorded in our caller's structure,
1622 * and replay those that are higher than when we started the call.
1624 * We free all the structures in the queue when the count of the # of outstanding
1625 * callback-granting calls drops to zero.
1627 * We call this function with the scp locked, too, but in its current implementation,
1628 * this knowledge is not used.
1630 void cm_StartCallbackGrantingCall(cm_scache_t *scp, cm_callbackRequest_t *cbrp)
1632 lock_ObtainWrite(&cm_callbackLock);
1633 cbrp->callbackCount = cm_callbackCount;
1634 cm_activeCallbackGrantingCalls++;
1635 cbrp->startTime = time(NULL);
1636 cbrp->serverp = NULL;
1637 lock_ReleaseWrite(&cm_callbackLock);
1640 /* Called at the end of a callback-granting call, to remove the callback
1641 * info from the scache entry, if necessary.
1643 * Called with scp write locked, so we can discard the callbacks easily with
1644 * this locking hierarchy.
1646 * Performs cleanup of the stack allocated cm_callbackRequest_t object.
1648 * Returns 0 on success and non-zero if the callback lost a race.
1651 cm_EndCallbackGrantingCall(cm_scache_t *scp, cm_callbackRequest_t *cbrp,
1652 AFSCallBack *cbp, AFSVolSync *volSyncp, long flags)
1654 cm_racingRevokes_t *revp; /* where we are */
1655 cm_racingRevokes_t *nrevp; /* where we'll be next */
1656 int freeRacingRevokes;
1658 cm_server_t * serverp = NULL;
1661 lock_ObtainWrite(&cm_callbackLock);
1662 if (flags & CM_CALLBACK_MAINTAINCOUNT) {
1663 osi_assertx(cm_activeCallbackGrantingCalls > 0,
1664 "CM_CALLBACK_MAINTAINCOUNT && cm_activeCallbackGrantingCalls == 0");
1668 osi_assertx(cm_activeCallbackGrantingCalls-- > 0,
1669 "!CM_CALLBACK_MAINTAINCOUNT && cm_activeCallbackGrantingCalls == 0");
1672 if (cm_activeCallbackGrantingCalls == 0)
1673 freeRacingRevokes = 1;
1675 freeRacingRevokes = 0;
1678 * a callback was revoked during our granting call, so
1679 * run down the list of revoked fids, looking for ours.
1680 * If activeCallbackGrantingCalls is zero, free the elements, too.
1682 * May need to go through entire list just to do the freeing.
1684 for (revp = cm_racingRevokesp; revp; revp = nrevp) {
1685 nrevp = (cm_racingRevokes_t *) osi_QNext(&revp->q);
1686 /* if this callback came in later than when we started the
1687 * callback-granting call, and if this fid is the right fid,
1688 * then clear the callback.
1690 if (scp && cbrp && cbrp->callbackCount != cm_callbackCount
1691 && revp->callbackCount > cbrp->callbackCount
1692 && (( scp->fid.volume == revp->fid.volume &&
1693 scp->fid.vnode == revp->fid.vnode &&
1694 scp->fid.unique == revp->fid.unique)
1696 ((revp->flags & CM_RACINGFLAG_CANCELVOL) &&
1697 scp->fid.volume == revp->fid.volume)
1699 ((revp->flags & CM_RACINGFLAG_CANCELALL) &&
1700 (revp->fid.cell == 0 || scp->fid.cell == revp->fid.cell)))) {
1701 /* this one matches */
1703 "Racing revoke scp 0x%p old cbc %d rev cbc %d cur cbc %d",
1705 cbrp->callbackCount, revp->callbackCount,
1708 if ((scp->flags & CM_SCACHEFLAG_PURERO) &&
1709 (revp->flags & CM_RACINGFLAG_ALL))
1710 cm_callbackDiscardROVolumeByFID(&scp->fid);
1712 if (freeRacingRevokes)
1716 /* if we freed the list, zap the pointer to it */
1717 if (freeRacingRevokes)
1718 cm_racingRevokesp = NULL;
1719 lock_ReleaseWrite(&cm_callbackLock);
1721 /* record the callback if we didn't lose it */
1722 if (!lostRace && scp) {
1724 if (!cm_ServerEqual(scp->cbServerp, cbrp->serverp)) {
1725 serverp = scp->cbServerp;
1726 scp->cbServerp = cbrp->serverp;
1728 cbrp->serverp = NULL;
1730 cm_GetServer(scp->cbServerp);
1732 } else if (freeServer) {
1733 serverp = cbrp->serverp;
1734 cbrp->serverp = NULL;
1736 scp->cbExpires = cbrp->startTime + cbp->ExpirationTime;
1737 scp->cbIssued = time(NULL);
1740 if (scp->flags & CM_SCACHEFLAG_PURERO) {
1741 cm_volume_t * volp = cm_GetVolumeByFID(&scp->fid);
1744 lock_ObtainWrite(&cm_scacheLock);
1745 volp->cbExpiresRO = scp->cbExpires;
1746 volp->cbIssuedRO = scp->cbIssued;
1747 if (cm_readonlyVolumeVersioning || !(flags & CM_CALLBACK_BULKSTAT))
1748 volp->creationDateRO = volSyncp->spare1;
1750 volp->creationDateRO = 0;
1751 if (volp->cbServerpRO != scp->cbServerp) {
1752 if (volp->cbServerpRO)
1753 cm_PutServer(volp->cbServerpRO);
1754 cm_GetServer(scp->cbServerp);
1755 volp->cbServerpRO = scp->cbServerp;
1757 lock_ReleaseWrite(&cm_scacheLock);
1766 * No need to discard the cm_scache object or notify the
1767 * afs redirector or smb client about a change if we did lose
1768 * the race. That was done when the callback was processed in
1769 * cm_RevokeCallback().
1771 if (cbrp && freeServer) {
1772 serverp = cbrp->serverp;
1773 cbrp->serverp = NULL;
1778 lock_ObtainWrite(&cm_serverLock);
1779 cm_FreeServer(serverp);
1780 lock_ReleaseWrite(&cm_serverLock);
1786 /* if flags is 1, we want to force the code to make one call, anyway.
1787 * called with locked scp; returns with same.
1789 long cm_GetCallback(cm_scache_t *scp, struct cm_user *userp,
1790 struct cm_req *reqp, long flags)
1793 cm_conn_t *connp = NULL;
1794 AFSFetchStatus afsStatus;
1796 AFSCallBack callback;
1798 cm_callbackRequest_t cbr;
1801 struct rx_connection * rxconnp = NULL;
1802 int syncop_done = 0;
1804 memset(&volSync, 0, sizeof(volSync));
1806 osi_Log4(afsd_logp, "GetCallback scp 0x%p cell %d vol %d flags %lX",
1807 scp, scp->fid.cell, scp->fid.volume, flags);
1809 #ifdef AFS_FREELANCE_CLIENT
1810 // The case where a callback is needed on /afs is handled
1811 // specially. We need to fetch the status by calling
1813 if (cm_freelanceEnabled &&
1814 (scp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
1815 scp->fid.volume==AFS_FAKE_ROOT_VOL_ID)) {
1817 code = cm_SyncOp(scp, NULL, userp, reqp, 0,
1818 CM_SCACHESYNC_FETCHSTATUS | CM_SCACHESYNC_GETCALLBACK);
1823 if (scp->dataVersion != cm_data.fakeDirVersion) {
1824 memset(&afsStatus, 0, sizeof(afsStatus));
1825 memset(&volSync, 0, sizeof(volSync));
1826 InterlockedIncrement(&scp->activeRPCs);
1828 // Fetch the status info
1829 code = cm_MergeStatus(NULL, scp, &afsStatus, &volSync, userp, reqp, 0);
1833 #endif /* AFS_FREELANCE_CLIENT */
1835 mustCall = (flags & 1);
1836 cm_AFSFidFromFid(&tfid, &scp->fid);
1838 if (!mustCall && cm_HaveCallback(scp))
1841 /* turn off mustCall, since it has now forced us past the check above */
1844 /* otherwise, we have to make an RPC to get the status */
1846 code = cm_SyncOp(scp, NULL, userp, reqp, 0,
1847 CM_SCACHESYNC_FETCHSTATUS | CM_SCACHESYNC_GETCALLBACK);
1852 cm_StartCallbackGrantingCall(scp, &cbr);
1854 lock_ReleaseWrite(&scp->rw);
1856 /* now make the RPC */
1857 InterlockedIncrement(&scp->activeRPCs);
1858 osi_Log4(afsd_logp, "CALL FetchStatus scp 0x%p vol %u vn %u uniq %u",
1859 scp, sfid.volume, sfid.vnode, sfid.unique);
1861 code = cm_ConnFromFID(&sfid, userp, reqp, &connp);
1865 rxconnp = cm_GetRxConn(connp);
1866 code = RXAFS_FetchStatus(rxconnp, &tfid,
1867 &afsStatus, &callback, &volSync);
1868 rx_PutConnection(rxconnp);
1870 } while (cm_Analyze(connp, userp, reqp, &sfid, NULL, 0, &afsStatus, &volSync, NULL,
1872 code = cm_MapRPCError(code, reqp);
1874 osi_Log4(afsd_logp, "CALL FetchStatus FAILURE code 0x%x scp 0x%p vol %u vn %u",
1875 code, scp, scp->fid.volume, scp->fid.vnode);
1877 osi_Log4(afsd_logp, "CALL FetchStatus SUCCESS scp 0x%p vol %u vn %u uniq %u",
1878 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1880 lock_ObtainWrite(&scp->rw);
1882 int lostRace = cm_EndCallbackGrantingCall(scp, &cbr, &callback, &volSync, 0);
1884 code = cm_MergeStatus(NULL, scp, &afsStatus, &volSync, userp, reqp, 0);
1886 cm_EndCallbackGrantingCall(NULL, &cbr, NULL, NULL, 0);
1887 InterlockedDecrement(&scp->activeRPCs);
1890 /* if we got an error, return to caller */
1897 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_FETCHSTATUS | CM_SCACHESYNC_GETCALLBACK);
1900 osi_Log2(afsd_logp, "GetCallback Failed code 0x%x scp 0x%p -->",code, scp);
1901 osi_Log4(afsd_logp, " cell %u vol %u vn %u uniq %u",
1902 scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1904 osi_Log3(afsd_logp, "GetCallback Complete scp 0x%p cell %d vol %d",
1905 scp, scp->fid.cell, scp->fid.volume);
1913 * cm_CBServersDownTime() returns 1 if the downTime parameter is valid.
1915 * Servers with multiple interfaces have multiple cm_server_t objects
1916 * which share the same UUID. If one interface is down but others are up,
1917 * the server should not be considered down. The returned downTime should
1918 * be the largest non-zero value if down or zero if up. If the cbServerp
1919 * is down, it is updated to refer to an interface that is up (if one exists).
1921 * called with cm_scacheLock held
1924 cm_CBServersDownTime(cm_scache_t *scp, cm_volume_t *volp, time_t * pdownTime)
1926 cm_vol_state_t *statep;
1927 cm_serverRef_t *tsrp;
1929 time_t downTime = 0;
1930 cm_server_t * upserver = NULL;
1931 cm_server_t * downserver;
1935 if (scp->cbServerp == NULL)
1938 if (!(scp->cbServerp->flags & CM_SERVERFLAG_DOWN))
1941 statep = cm_VolumeStateByID(volp, scp->fid.volume);
1943 for (tsrp = statep->serversp; tsrp; tsrp=tsrp->next) {
1944 if (tsrp->status == srv_deleted)
1947 if (!cm_ServerEqual(tsrp->server, scp->cbServerp))
1950 if (!(tsrp->server->flags & CM_SERVERFLAG_DOWN)) {
1953 upserver = tsrp->server;
1954 cm_GetServer(upserver);
1958 if (tsrp->server->downTime > downTime)
1959 downTime = tsrp->server->downTime;
1962 downTime = scp->cbServerp->downTime;
1965 /* if the cbServerp does not match the current volume server list
1966 * we report the callback server as up so the callback can be
1971 *pdownTime = downTime;
1973 lock_ObtainWrite(&scp->rw);
1974 downserver = scp->cbServerp;
1975 scp->cbServerp = upserver;
1976 lock_ReleaseWrite(&scp->rw);
1977 cm_PutServer(downserver);
1982 /* called periodically by cm_daemon to shut down use of expired callbacks */
1983 void cm_CheckCBExpiration(void)
1988 enum volstatus volstate;
1989 time_t now, downTime;
1991 osi_Log0(afsd_logp, "CheckCBExpiration");
1994 lock_ObtainWrite(&cm_scacheLock);
1995 for (i=0; i<cm_data.scacheHashTableSize; i++) {
1996 for (scp = cm_data.scacheHashTablep[i]; scp; scp=scp->nextp) {
1998 cm_HoldSCacheNoLock(scp);
1999 lock_ReleaseWrite(&cm_scacheLock);
2002 * If this is not a PURERO object and there is no callback
2003 * or it hasn't expired, there is nothing to do
2005 if (!(scp->flags & CM_SCACHEFLAG_PURERO) &&
2006 (scp->cbServerp == NULL || scp->cbExpires == 0 || now < scp->cbExpires))
2010 * Determine the volume state and update the callback info
2011 * to the latest if it is a PURERO object.
2013 volp = cm_GetVolumeByFID(&scp->fid);
2014 volstate = vl_unknown;
2017 if ((scp->flags & CM_SCACHEFLAG_PURERO) &&
2018 volp->cbExpiresRO > scp->cbExpires && scp->cbExpires > 0)
2020 lock_ObtainWrite(&scp->rw);
2021 scp->cbExpires = volp->cbExpiresRO;
2022 scp->cbIssued = volp->cbIssuedRO;
2023 if (volp->cbServerpRO != scp->cbServerp) {
2025 cm_PutServer(scp->cbServerp);
2026 cm_GetServer(volp->cbServerpRO);
2027 scp->cbServerp = volp->cbServerpRO;
2029 lock_ReleaseWrite(&scp->rw);
2031 volstate = cm_GetVolumeStatus(volp, scp->fid.volume);
2034 /* If there is no callback or it hasn't expired, there is nothing to do */
2035 if (scp->cbServerp == NULL || scp->cbExpires == 0 || now < scp->cbExpires)
2038 /* If the volume is known not to be online, do not expire the callback */
2039 if (volstate != vl_online)
2043 * If all the servers are down and the callback expired after the
2044 * issuing server went down, do not expire the callback
2046 if (cm_CBServersDownTime(scp, volp, &downTime) && downTime && downTime < scp->cbExpires)
2049 /* The callback has expired, discard the status info */
2050 osi_Log4(afsd_logp, "Callback Expiration Discarding SCache scp 0x%p vol %u vn %u uniq %u",
2051 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
2052 lock_ObtainWrite(&scp->rw);
2053 cm_DiscardSCache(scp);
2054 lock_ReleaseWrite(&scp->rw);
2056 if (RDR_Initialized)
2057 RDR_InvalidateObject(scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique,
2058 scp->fid.hash, scp->fileType, AFS_INVALIDATE_EXPIRED);
2060 cm_CallbackNotifyChange(scp);
2062 if (scp->fileType == CM_SCACHETYPE_DIRECTORY &&
2063 !(volp && (volp->flags & CM_VOLUMEFLAG_DFS_VOLUME)) &&
2064 !cm_accessPerFileCheck)
2065 cm_EAccesClearParentEntries(&scp->fid);
2071 lock_ObtainWrite(&cm_scacheLock);
2072 cm_ReleaseSCacheNoLock(scp);
2075 lock_ReleaseWrite(&cm_scacheLock);
2077 osi_Log0(afsd_logp, "CheckCBExpiration Complete");
2082 cm_GiveUpAllCallbacks(cm_server_t *tsp, afs_int32 markDown)
2086 struct rx_connection * rxconnp;
2088 if ((tsp->type == CM_SERVER_FILE) && !(tsp->flags & CM_SERVERFLAG_DOWN))
2090 code = cm_ConnByServer(tsp, cm_rootUserp, FALSE, &connp);
2092 rxconnp = cm_GetRxConn(connp);
2093 rx_SetConnDeadTime(rxconnp, 10);
2094 code = RXAFS_GiveUpAllCallBacks(rxconnp);
2095 rx_SetConnDeadTime(rxconnp, ConnDeadtimeout);
2096 rx_PutConnection(rxconnp);
2100 cm_server_vols_t * tsrvp;
2104 cm_ForceNewConnections(tsp);
2106 lock_ObtainMutex(&tsp->mx);
2107 if (!(tsp->flags & CM_SERVERFLAG_DOWN)) {
2108 _InterlockedOr(&tsp->flags, CM_SERVERFLAG_DOWN);
2109 tsp->downTime = time(NULL);
2111 /* Now update the volume status */
2112 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
2113 for (i=0; i<NUM_SERVER_VOLS; i++) {
2114 if (tsrvp->ids[i] != 0) {
2118 lock_ReleaseMutex(&tsp->mx);
2119 code = cm_FindVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
2120 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE | CM_GETVOL_FLAG_NO_RESET, &volp);
2121 lock_ObtainMutex(&tsp->mx);
2123 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
2129 lock_ReleaseMutex(&tsp->mx);
2135 cm_GiveUpAllCallbacksAllServers(afs_int32 markDown)
2139 if (!cm_giveUpAllCBs)
2142 lock_ObtainRead(&cm_serverLock);
2143 for (tsp = cm_allServersp; tsp; tsp = tsp->allNextp) {
2144 cm_GetServerNoLock(tsp);
2145 lock_ReleaseRead(&cm_serverLock);
2146 cm_GiveUpAllCallbacks(tsp, markDown);
2147 lock_ObtainRead(&cm_serverLock);
2148 cm_PutServerNoLock(tsp);
2150 lock_ReleaseRead(&cm_serverLock);
2154 cm_GiveUpAllCallbacksAllServersMulti(afs_int32 markDown)
2157 cm_conn_t **conns = NULL;
2158 struct rx_connection **rxconns = NULL;
2159 afs_int32 i, nconns = 0, maxconns;
2160 cm_server_t ** serversp, *tsp;
2162 time_t start, *deltas;
2164 maxconns = cm_numFileServers;
2168 conns = (cm_conn_t **)malloc(maxconns * sizeof(cm_conn_t *));
2169 rxconns = (struct rx_connection **)malloc(maxconns * sizeof(struct rx_connection *));
2170 deltas = (time_t *)malloc(maxconns * sizeof (time_t));
2171 results = (afs_int32 *)malloc(maxconns * sizeof (afs_int32));
2172 serversp = (cm_server_t **)malloc(maxconns * sizeof(cm_server_t *));
2174 lock_ObtainRead(&cm_serverLock);
2175 for (nconns=0, tsp = cm_allServersp; tsp && nconns < maxconns; tsp = tsp->allNextp) {
2176 if (tsp->type != CM_SERVER_FILE ||
2177 (tsp->flags & CM_SERVERFLAG_DOWN) ||
2178 tsp->cellp == NULL /* SetPrefs only */)
2181 cm_GetServerNoLock(tsp);
2182 lock_ReleaseRead(&cm_serverLock);
2184 serversp[nconns] = tsp;
2185 code = cm_ConnByServer(tsp, cm_rootUserp, FALSE, &conns[nconns]);
2187 lock_ObtainRead(&cm_serverLock);
2188 cm_PutServerNoLock(tsp);
2191 lock_ObtainRead(&cm_serverLock);
2192 rxconns[nconns] = cm_GetRxConn(conns[nconns]);
2193 rx_SetConnDeadTime(rxconns[nconns], 10);
2197 lock_ReleaseRead(&cm_serverLock);
2200 /* Perform the multi call */
2202 multi_Rx(rxconns,nconns)
2204 multi_RXAFS_GiveUpAllCallBacks();
2205 results[multi_i]=multi_error;
2209 /* Process results of servers that support RXAFS_GetCapabilities */
2210 for (i=0; i<nconns; i++) {
2211 rx_SetConnDeadTime(rxconns[i], ConnDeadtimeout);
2212 rx_PutConnection(rxconns[i]);
2213 cm_PutConn(conns[i]);
2216 cm_GCConnections(tsp);
2219 cm_server_vols_t * tsrvp;
2223 cm_ForceNewConnections(tsp);
2225 lock_ObtainMutex(&tsp->mx);
2226 if (!(tsp->flags & CM_SERVERFLAG_DOWN)) {
2227 _InterlockedOr(&tsp->flags, CM_SERVERFLAG_DOWN);
2228 tsp->downTime = time(NULL);
2230 /* Now update the volume status */
2231 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
2232 for (i=0; i<NUM_SERVER_VOLS; i++) {
2233 if (tsrvp->ids[i] != 0) {
2237 lock_ReleaseMutex(&tsp->mx);
2238 code = cm_FindVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
2239 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE | CM_GETVOL_FLAG_NO_RESET, &volp);
2240 lock_ObtainMutex(&tsp->mx);
2242 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
2248 lock_ReleaseMutex(&tsp->mx);