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 if (volp->cbServerpRO) {
230 cm_PutServer(volp->cbServerpRO);
231 volp->cbServerpRO = NULL;
233 volp->creationDateRO = 0;
238 /* called to revoke a volume callback, which is typically issued when a volume
239 * is moved from one server to another.
241 * Called with no locks held.
243 void cm_RevokeVolumeCallback(struct rx_call *callp, cm_cell_t *cellp, AFSFid *fidp)
249 osi_Log1(afsd_logp, "RevokeVolumeCallback vol %u", fidp->Volume);
251 /* do this first, so that if we're executing a callback granting call
252 * at this moment, we kill it before it can be merged in. Otherwise,
253 * it could complete while we're doing the scan below, and get missed
254 * by both the scan and by this code.
256 tfid.cell = cellp ? cellp->cellID : 0;
257 tfid.volume = fidp->Volume;
258 tfid.vnode = tfid.unique = 0;
259 cm_RecordRacingRevoke(&tfid, CM_RACINGFLAG_CANCELVOL);
261 lock_ObtainWrite(&cm_scacheLock);
262 for (hash = 0; hash < cm_data.scacheHashTableSize; hash++) {
263 for(scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
264 if (scp->fid.volume == fidp->Volume &&
265 (cellp == NULL || scp->fid.cell == cellp->cellID) &&
266 scp->cbExpires > 0 &&
267 scp->cbServerp != NULL) {
268 cm_HoldSCacheNoLock(scp);
269 lock_ReleaseWrite(&cm_scacheLock);
271 lock_ObtainWrite(&scp->rw);
272 osi_Log5(afsd_logp, "RevokeVolumeCallback Discarding SCache scp 0x%p vol %u vn %u uniq %u",
273 scp, scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
274 osi_Log2(afsd_logp, ".... dv 0x%x:%x",
275 (afs_uint32)((scp->dataVersion >> 32) & 0xFFFFFFFF),
276 (afs_uint32)(scp->dataVersion & 0xFFFFFFFF));
278 cm_DiscardSCache(scp);
279 lock_ReleaseWrite(&scp->rw);
282 RDR_InvalidateObject(scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique,
283 scp->fid.hash, scp->fileType, AFS_INVALIDATE_CALLBACK);
285 cm_CallbackNotifyChange(scp);
286 lock_ObtainWrite(&cm_scacheLock);
287 cm_ReleaseSCacheNoLock(scp);
288 if (scp->flags & CM_SCACHEFLAG_PURERO)
289 cm_callbackDiscardROVolumeByFID(&scp->fid);
291 } /* search one hash bucket */
292 } /* search all hash buckets */
294 lock_ReleaseWrite(&cm_scacheLock);
296 if (cellp && RDR_Initialized)
297 RDR_InvalidateVolume(cellp->cellID, fidp->Volume, AFS_INVALIDATE_CALLBACK);
299 osi_Log1(afsd_logp, "RevokeVolumeCallback Complete vol %d", fidp->Volume);
303 * afs_data_pointer_to_int32() - returns least significant afs_int32 of the
304 * given data pointer, without triggering "cast truncates pointer"
305 * warnings. We use this where we explicitly don't care whether a
306 * pointer is truncated -- it loses information where a pointer is
307 * larger than an afs_int32.
311 afs_data_pointer_to_int32(const void *p)
314 afs_int32 i32[sizeof(void *) / sizeof(afs_int32)];
318 int i32_sub; /* subscript of least significant afs_int32 in ip.i32[] */
323 /* used to determine the byte order of the system */
326 char c[sizeof(int) / sizeof(char)];
332 /* little-endian system */
335 /* big-endian system */
336 i32_sub = (sizeof ip.i32 / sizeof ip.i32[0]) - 1;
341 return ip.i32[i32_sub];
343 /*------------------------------------------------------------------------
344 * EXPORTED SRXAFSCB_CallBack
347 * Routine called by the server-side callback RPC interface to
348 * implement passing in callback information.
352 * rx_call : Ptr to Rx call on which this request came in.
353 * fidsArrayp : Ptr to array of fids involved.
354 * cbsArrayp : Ptr to matching callback info for the fids.
360 * Nothing interesting.
364 *------------------------------------------------------------------------*/
365 /* handle incoming RPC callback breaking message.
366 * Called with no locks held.
369 SRXAFSCB_CallBack(struct rx_call *callp, AFSCBFids *fidsArrayp, AFSCBs *cbsArrayp)
373 struct rx_connection *connp;
374 struct rx_peer *peerp;
375 unsigned long host = 0;
376 unsigned short port = 0;
377 cm_server_t *tsp = NULL;
378 cm_cell_t* cellp = NULL;
383 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
384 host = rx_HostOf(peerp);
385 port = rx_PortOf(peerp);
387 tsp = cm_FindServerByIP(host, port, CM_SERVER_FILE, FALSE);
394 osi_Log2(afsd_logp, "SRXAFSCB_CallBack from host 0x%x port %d",
398 osi_Log3(afsd_logp, "SRXAFSCB_CallBack from host 0x%x port %d for cell %s",
401 cellp->name /* does not need to be saved, doesn't change */);
403 osi_Log0(afsd_logp, "SRXAFSCB_CallBack from unknown host");
407 for (i=0; i < (long) fidsArrayp->AFSCBFids_len; i++) {
408 tfidp = &fidsArrayp->AFSCBFids_val[i];
410 if (tfidp->Volume == 0)
411 continue; /* means don't do anything */
412 else if (tfidp->Vnode == 0)
413 cm_RevokeVolumeCallback(callp, cellp, tfidp);
415 cm_RevokeCallback(callp, cellp, tfidp);
420 /*------------------------------------------------------------------------
421 * EXPORTED SRXAFSCB_InitCallBackState
424 * Routine called by the server-side callback RPC interface to
425 * implement clearing all callbacks from this host.
428 * rx_call : Ptr to Rx call on which this request came in.
434 * Nothing interesting.
438 *------------------------------------------------------------------------*/
439 /* called with no locks by RPC system when a server indicates that it has never
440 * heard from us, or for other reasons has had to discard callbacks from us
441 * without telling us, e.g. a network partition.
444 SRXAFSCB_InitCallBackState(struct rx_call *callp)
449 osi_Log0(afsd_logp, "SRXAFSCB_InitCallBackState ->");
451 return SRXAFSCB_InitCallBackState3(callp, NULL);
454 /*------------------------------------------------------------------------
455 * EXPORTED SRXAFSCB_Probe
458 * Routine called by the server-side callback RPC interface to
459 * implement ``probing'' the Cache Manager, just making sure it's
463 * rx_call : Ptr to Rx call on which this request came in.
469 * Nothing interesting.
473 *------------------------------------------------------------------------*/
475 SRXAFSCB_Probe(struct rx_call *callp)
477 struct rx_connection *connp;
478 struct rx_peer *peerp;
479 unsigned long host = 0;
480 unsigned short port = 0;
485 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
486 host = rx_HostOf(peerp);
487 port = rx_PortOf(peerp);
490 osi_Log2(afsd_logp, "SRXAFSCB_Probe from host 0x%x port %d",
497 /*------------------------------------------------------------------------
498 * EXPORTED SRXAFSCB_GetLock
501 * Routine called by the server-side callback RPC interface to
502 * implement pulling out the contents of a lock in the lock
506 * a_call : Ptr to Rx call on which this request came in.
507 * a_index : Index of desired lock.
508 * a_result : Ptr to a buffer for the given lock.
511 * 0 if everything went fine,
512 * 1 if we were given a bad index.
515 * Nothing interesting.
519 *------------------------------------------------------------------------*/
520 /* debug interface */
522 extern osi_rwlock_t cm_aclLock;
523 extern osi_rwlock_t buf_globalLock;
524 extern osi_rwlock_t cm_cellLock;
525 extern osi_rwlock_t cm_connLock;
526 extern osi_rwlock_t cm_dnlcLock;
527 extern osi_rwlock_t cm_scacheLock;
528 extern osi_rwlock_t cm_serverLock;
529 extern osi_rwlock_t cm_syscfgLock;
530 extern osi_rwlock_t cm_userLock;
531 extern osi_rwlock_t cm_utilsLock;
532 extern osi_rwlock_t cm_volumeLock;
533 extern osi_rwlock_t smb_globalLock;
534 extern osi_rwlock_t smb_rctLock;
536 extern osi_mutex_t cm_Freelance_Lock;
537 extern osi_mutex_t cm_Afsdsbmt_Lock;
538 extern osi_mutex_t tokenEventLock;
539 extern osi_mutex_t smb_ListenerLock;
540 extern osi_mutex_t smb_RawBufLock;
541 extern osi_mutex_t smb_Dir_Watch_Lock;
543 #define LOCKTYPE_RW 1
544 #define LOCKTYPE_MUTEX 2
545 static struct _ltable {
550 {"cm_scacheLock", (char*)&cm_scacheLock, LOCKTYPE_RW},
551 {"buf_globalLock", (char*)&buf_globalLock, LOCKTYPE_RW},
552 {"cm_serverLock", (char*)&cm_serverLock, LOCKTYPE_RW},
553 {"cm_callbackLock", (char*)&cm_callbackLock, LOCKTYPE_RW},
554 {"cm_syscfgLock", (char*)&cm_syscfgLock, LOCKTYPE_RW},
555 {"cm_aclLock", (char*)&cm_aclLock, LOCKTYPE_RW},
556 {"cm_cellLock", (char*)&cm_cellLock, LOCKTYPE_RW},
557 {"cm_connLock", (char*)&cm_connLock, LOCKTYPE_RW},
558 {"cm_userLock", (char*)&cm_userLock, LOCKTYPE_RW},
559 {"cm_volumeLock", (char*)&cm_volumeLock, LOCKTYPE_RW},
560 {"cm_dnlcLock", (char*)&cm_dnlcLock, LOCKTYPE_RW},
561 {"cm_utilsLock", (char*)&cm_utilsLock, LOCKTYPE_RW},
562 {"smb_globalLock", (char*)&smb_globalLock, LOCKTYPE_RW},
563 {"smb_rctLock", (char*)&smb_rctLock, LOCKTYPE_RW},
564 {"cm_Freelance_Lock",(char*)&cm_Freelance_Lock, LOCKTYPE_MUTEX},
565 {"cm_Afsdsbmt_Lock", (char*)&cm_Afsdsbmt_Lock, LOCKTYPE_MUTEX},
566 {"tokenEventLock", (char*)&tokenEventLock, LOCKTYPE_MUTEX},
567 {"smb_ListenerLock", (char*)&smb_ListenerLock, LOCKTYPE_MUTEX},
568 {"smb_RawBufLock", (char*)&smb_RawBufLock, LOCKTYPE_MUTEX},
569 {"smb_Dir_Watch_Lock",(char*)&smb_Dir_Watch_Lock, LOCKTYPE_MUTEX}
573 SRXAFSCB_GetLock(struct rx_call *callp, long index, AFSDBLock *lockp)
575 struct _ltable *tl; /*Ptr to lock table entry */
578 int nentries; /*Num entries in table */
579 int code; /*Return code */
580 struct rx_connection *connp;
581 struct rx_peer *peerp;
582 unsigned long host = 0;
583 unsigned short port = 0;
588 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
589 host = rx_HostOf(peerp);
590 port = rx_PortOf(peerp);
593 osi_Log3(afsd_logp, "SRXAFSCB_GetLock(%d) from host 0x%x port %d",
594 index, ntohl(host), ntohs(port));
596 nentries = sizeof(ltable) / sizeof(struct _ltable);
597 if (index < 0 || index >= nentries) {
604 * Found it - copy out its contents.
607 strncpy(lockp->name, tl->name, sizeof(lockp->name));
608 lockp->name[sizeof(lockp->name)-1] = '\0';
609 lockp->lock.waitStates = 0;
610 switch ( tl->type ) {
612 rwp = (osi_rwlock_t *)tl->addr;
613 lockp->lock.exclLocked = rwp->flags;
614 lockp->lock.readersReading = rwp->readers;
615 lockp->lock.numWaiting = rwp->waiters;
618 mtxp = (osi_mutex_t *)tl->addr;
619 lockp->lock.exclLocked = mtxp->flags;
620 lockp->lock.readersReading = 0;
621 lockp->lock.numWaiting = mtxp->waiters;
624 lockp->lock.pid_last_reader = 0;
625 lockp->lock.pid_writer = 0;
626 lockp->lock.src_indicator = 0;
633 /* debug interface */
635 SRXAFSCB_GetCE(struct rx_call *callp, long index, AFSDBCacheEntry *cep)
640 struct rx_connection *connp;
641 struct rx_peer *peerp;
642 unsigned long host = 0;
643 unsigned short port = 0;
648 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
649 host = rx_HostOf(peerp);
650 port = rx_PortOf(peerp);
653 osi_Log2(afsd_logp, "SRXAFSCB_GetCE from host 0x%x port %d",
654 ntohl(host), ntohs(port));
656 lock_ObtainRead(&cm_scacheLock);
657 for (i = 0; i < cm_data.scacheHashTableSize; i++) {
658 for (scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp) {
662 } /*Zip through current hash chain */
663 } /*Zip through hash chains */
673 * Copy out the located entry.
675 memset(cep, 0, sizeof(AFSDBCacheEntry));
676 cep->addr = afs_data_pointer_to_int32(scp);
677 cep->cell = scp->fid.cell;
678 cep->netFid.Volume = scp->fid.volume;
679 cep->netFid.Vnode = scp->fid.vnode;
680 cep->netFid.Unique = scp->fid.unique;
681 cep->lock.waitStates = 0;
682 cep->lock.exclLocked = scp->rw.flags;
683 cep->lock.readersReading = 0;
684 cep->lock.numWaiting = scp->rw.waiters;
685 cep->lock.pid_last_reader = 0;
686 cep->lock.pid_writer = 0;
687 cep->lock.src_indicator = 0;
688 cep->Length = scp->length.LowPart;
689 cep->DataVersion = (afs_uint32)(scp->dataVersion & 0xFFFFFFFF);
690 cep->callback = afs_data_pointer_to_int32(scp->cbServerp);
691 if (scp->flags & CM_SCACHEFLAG_PURERO) {
692 cm_volume_t *volp = cm_GetVolumeByFID(&scp->fid);
694 cep->cbExpires = volp->cbExpiresRO;
698 /* TODO: deal with time_t below */
699 cep->cbExpires = (afs_int32) scp->cbExpires;
701 cep->refCount = scp->refCount;
702 cep->opens = scp->openReads;
703 cep->writers = scp->openWrites;
704 switch (scp->fileType) {
705 case CM_SCACHETYPE_FILE:
708 case CM_SCACHETYPE_MOUNTPOINT:
711 case CM_SCACHETYPE_DIRECTORY:
712 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
717 case CM_SCACHETYPE_SYMLINK:
720 case CM_SCACHETYPE_DFSLINK:
723 case CM_SCACHETYPE_INVALID:
728 if (scp->flags & CM_SCACHEFLAG_STATD)
730 if (scp->flags & CM_SCACHEFLAG_RO || scp->flags & CM_SCACHEFLAG_PURERO)
732 if (scp->fileType == CM_SCACHETYPE_MOUNTPOINT &&
733 scp->mountPointStringp[0])
735 if (scp->flags & CM_SCACHEFLAG_WAITING)
740 * Return our results.
743 lock_ReleaseRead(&cm_scacheLock);
748 /* debug interface */
750 SRXAFSCB_GetCE64(struct rx_call *callp, long index, AFSDBCacheEntry64 *cep)
755 struct rx_connection *connp;
756 struct rx_peer *peerp;
757 unsigned long host = 0;
758 unsigned short port = 0;
763 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
764 host = rx_HostOf(peerp);
765 port = rx_PortOf(peerp);
768 osi_Log2(afsd_logp, "SRXAFSCB_GetCE64 from host 0x%x port %d",
769 ntohl(host), ntohs(port));
771 lock_ObtainRead(&cm_scacheLock);
772 for (i = 0; i < cm_data.scacheHashTableSize; i++) {
773 for (scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp) {
777 } /*Zip through current hash chain */
778 } /*Zip through hash chains */
788 * Copy out the located entry.
790 memset(cep, 0, sizeof(AFSDBCacheEntry64));
791 cep->addr = afs_data_pointer_to_int32(scp);
792 cep->cell = scp->fid.cell;
793 cep->netFid.Volume = scp->fid.volume;
794 cep->netFid.Vnode = scp->fid.vnode;
795 cep->netFid.Unique = scp->fid.unique;
796 cep->lock.waitStates = 0;
797 cep->lock.exclLocked = scp->rw.flags;
798 cep->lock.readersReading = 0;
799 cep->lock.numWaiting = scp->rw.waiters;
800 cep->lock.pid_last_reader = 0;
801 cep->lock.pid_writer = 0;
802 cep->lock.src_indicator = 0;
803 cep->Length = (afs_int64) scp->length.QuadPart;
804 cep->DataVersion = (afs_uint32)(scp->dataVersion & 0xFFFFFFFF);
805 cep->callback = afs_data_pointer_to_int32(scp->cbServerp);
806 if (scp->flags & CM_SCACHEFLAG_PURERO) {
807 cm_volume_t *volp = cm_GetVolumeByFID(&scp->fid);
809 cep->cbExpires = volp->cbExpiresRO;
813 /* TODO: handle time_t */
814 cep->cbExpires = (afs_int32) scp->cbExpires;
816 cep->refCount = scp->refCount;
817 cep->opens = scp->openReads;
818 cep->writers = scp->openWrites;
819 switch (scp->fileType) {
820 case CM_SCACHETYPE_FILE:
823 case CM_SCACHETYPE_MOUNTPOINT:
826 case CM_SCACHETYPE_DIRECTORY:
827 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
832 case CM_SCACHETYPE_SYMLINK:
835 case CM_SCACHETYPE_DFSLINK:
838 case CM_SCACHETYPE_INVALID:
843 if (scp->flags & CM_SCACHEFLAG_STATD)
845 if (scp->flags & CM_SCACHEFLAG_RO || scp->flags & CM_SCACHEFLAG_PURERO)
847 if (scp->fileType == CM_SCACHETYPE_MOUNTPOINT &&
848 scp->mountPointStringp[0])
850 if (scp->flags & CM_SCACHEFLAG_WAITING)
855 * Return our results.
858 lock_ReleaseRead(&cm_scacheLock);
863 /* debug interface: not implemented */
865 SRXAFSCB_XStatsVersion(struct rx_call *callp, long *vp)
867 struct rx_connection *connp;
868 struct rx_peer *peerp;
869 unsigned long host = 0;
870 unsigned short port = 0;
875 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
876 host = rx_HostOf(peerp);
877 port = rx_PortOf(peerp);
880 osi_Log2(afsd_logp, "SRXAFSCB_XStatsVersion from host 0x%x port %d - not implemented",
881 ntohl(host), ntohs(port));
887 /* debug interface: not implemented */
889 SRXAFSCB_GetXStats(struct rx_call *callp, long cvn, long coln, long *srvp, long *timep,
890 AFSCB_CollData *datap)
892 struct rx_connection *connp;
893 struct rx_peer *peerp;
894 unsigned long host = 0;
895 unsigned short port = 0;
900 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
901 host = rx_HostOf(peerp);
902 port = rx_PortOf(peerp);
905 osi_Log2(afsd_logp, "SRXAFSCB_GetXStats from host 0x%x port %d - not implemented",
906 ntohl(host), ntohs(port));
912 SRXAFSCB_InitCallBackState2(struct rx_call *callp, struct interfaceAddr* addr)
917 osi_Log0(afsd_logp, "SRXAFSCB_InitCallBackState2 ->");
919 return SRXAFSCB_InitCallBackState3(callp, NULL);
922 /* debug interface */
924 SRXAFSCB_WhoAreYou(struct rx_call *callp, struct interfaceAddr* addr)
928 struct rx_connection *connp;
929 struct rx_peer *peerp;
930 unsigned long host = 0;
931 unsigned short port = 0;
936 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
937 host = rx_HostOf(peerp);
938 port = rx_PortOf(peerp);
941 osi_Log2(afsd_logp, "SRXAFSCB_WhoAreYou from host 0x%x port %d",
945 lock_ObtainRead(&cm_syscfgLock);
946 if (cm_LanAdapterChangeDetected) {
947 lock_ConvertRToW(&cm_syscfgLock);
948 if (cm_LanAdapterChangeDetected) {
949 /* get network related info */
950 cm_noIPAddr = CM_MAXINTERFACE_ADDR;
951 code = syscfg_GetIFInfo(&cm_noIPAddr,
952 cm_IPAddr, cm_SubnetMask,
953 cm_NetMtu, cm_NetFlags);
954 cm_LanAdapterChangeDetected = 0;
956 lock_ConvertWToR(&cm_syscfgLock);
959 /* return all network interface addresses */
960 addr->numberOfInterfaces = cm_noIPAddr;
961 addr->uuid = cm_data.Uuid;
962 for ( i=0; i < cm_noIPAddr; i++ ) {
963 addr->addr_in[i] = cm_IPAddr[i];
964 addr->subnetmask[i] = cm_SubnetMask[i];
965 addr->mtu[i] = (rx_mtu == -1 || (rx_mtu != -1 && cm_NetMtu[i] < rx_mtu)) ?
966 cm_NetMtu[i] : rx_mtu;
969 lock_ReleaseRead(&cm_syscfgLock);
975 SRXAFSCB_InitCallBackState3(struct rx_call *callp, afsUUID* serverUuid)
979 cm_server_t *tsp = NULL;
980 cm_scache_t *scp = NULL;
981 cm_cell_t* cellp = NULL;
985 afs_uint32 discardType;
986 struct rx_connection *connp;
987 struct rx_peer *peerp;
988 unsigned long host = 0;
989 unsigned short port = 0;
994 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
995 host = rx_HostOf(peerp);
996 port = rx_PortOf(peerp);
999 if (UuidToString((UUID *)serverUuid, &p) == RPC_S_OK) {
1000 osi_Log1(afsd_logp, "SRXAFSCB_InitCallBackState3 Uuid%s ->",osi_LogSaveString(afsd_logp,p));
1004 tsp = cm_FindServerByUuid(serverUuid, CM_SERVER_FILE, FALSE);
1007 tsp = cm_FindServerByIP(host, port, CM_SERVER_FILE, FALSE);
1014 osi_Log2(afsd_logp, "SRXAFSCB_InitCallBackState3 from host 0x%x port %d",
1018 osi_Log3(afsd_logp, "SRXAFSCB_InitCallBackState3 from host 0x%x port %d for cell %s",
1021 cellp->name /* does not need to be saved, doesn't change */);
1023 osi_Log0(afsd_logp, "SRXAFSCB_InitCallBackState3 from unknown host");
1026 if (connp && peerp) {
1027 tsp = cm_FindServerByIP(host, port, CM_SERVER_FILE, FALSE);
1029 osi_Log1(afsd_logp, "InitCallbackState3 server %x", tsp);
1031 /* record the callback in the racing revokes structure. This
1032 * shouldn't be necessary, since we shouldn't be making callback
1033 * granting calls while we're going to get an initstate call,
1034 * but there probably are some obscure races, so better safe
1037 * We do this first since we don't hold the cm_scacheLock and vnode
1038 * locks over the entire callback scan operation below. The
1039 * big loop below is guaranteed to hit any callback already
1040 * processed. The call to RecordRacingRevoke is guaranteed
1041 * to kill any callback that is currently being returned.
1042 * Anything that sneaks past both must start
1043 * after the call to RecordRacingRevoke.
1048 fid.cell = cellp->cellID;
1049 fid.volume = fid.vnode = fid.unique = 0;
1051 cm_RecordRacingRevoke(&fid, CM_RACINGFLAG_CANCELALL);
1053 cm_RecordRacingRevoke(NULL, CM_RACINGFLAG_CANCELALL);
1056 /* now search all vnodes looking for guys with this callback, if we
1057 * found it, or guys with any callbacks, if we didn't find the server
1058 * (that's how multihomed machines will appear and how we'll handle
1059 * them, albeit a little inefficiently). That is, we're discarding all
1060 * callbacks from all hosts if we get an initstate call from an unknown
1061 * host. Since these calls are rare, and multihomed servers
1062 * are "rare," hopefully this won't be a problem.
1064 lock_ObtainWrite(&cm_scacheLock);
1065 for (hash = 0; hash < cm_data.scacheHashTableSize; hash++) {
1066 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
1067 cm_HoldSCacheNoLock(scp);
1068 lock_ReleaseWrite(&cm_scacheLock);
1069 lock_ObtainWrite(&scp->rw);
1071 if (scp->cbExpires > 0 && scp->cbServerp != NULL) {
1072 /* we have a callback, now decide if we should clear it */
1073 if (cm_ServerEqual(scp->cbServerp, tsp)) {
1074 osi_Log4(afsd_logp, "InitCallbackState3 Discarding SCache scp 0x%p vol %u vn %u uniq %u",
1075 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1076 discardFid = scp->fid;
1077 discardType = scp->fileType;
1078 cm_DiscardSCache(scp);
1082 lock_ReleaseWrite(&scp->rw);
1084 cm_CallbackNotifyChange(scp);
1085 if (RDR_Initialized)
1086 RDR_InvalidateObject(discardFid.cell, discardFid.volume, discardFid.vnode, discardFid.unique,
1087 discardFid.hash, discardType, AFS_INVALIDATE_EXPIRED);
1089 lock_ObtainWrite(&cm_scacheLock);
1090 cm_ReleaseSCacheNoLock(scp);
1092 if (discarded && (scp->flags & CM_SCACHEFLAG_PURERO))
1093 cm_callbackDiscardROVolumeByFID(&scp->fid);
1095 } /* search one hash bucket */
1096 } /* search all hash buckets */
1098 lock_ReleaseWrite(&cm_scacheLock);
1101 /* reset the No flags on the server */
1102 cm_SetServerNo64Bit(tsp, 0);
1103 cm_SetServerNoInlineBulk(tsp, 0);
1105 /* we're done with the server structure */
1112 /* debug interface */
1114 SRXAFSCB_ProbeUuid(struct rx_call *callp, afsUUID* clientUuid)
1116 struct rx_connection *connp;
1117 struct rx_peer *peerp;
1118 unsigned long host = 0;
1119 unsigned short port = 0;
1126 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1127 host = rx_HostOf(peerp);
1128 port = rx_PortOf(peerp);
1131 if ( !afs_uuid_equal(&cm_data.Uuid, clientUuid) ) {
1132 UuidToString((UUID *)&cm_data.Uuid, &p);
1133 UuidToString((UUID *)clientUuid, &q);
1134 osi_Log4(afsd_logp, "SRXAFSCB_ProbeUuid %s != %s from host 0x%x port %d",
1135 osi_LogSaveString(afsd_logp,p),
1136 osi_LogSaveString(afsd_logp,q),
1142 code = 1; /* failure */
1144 osi_Log2(afsd_logp, "SRXAFSCB_ProbeUuid (success) from host 0x%x port %d",
1151 /* debug interface */
1153 GetCellCommon(afs_int32 a_cellnum, char **a_name, serverList *a_hosts)
1157 cm_serverRef_t * serverRefp;
1160 cellp = cm_FindCellByID(a_cellnum, CM_FLAG_NOPROBE);
1162 *a_name = (char *)xdr_alloc(sizeof(char));
1168 lock_ObtainRead(&cm_serverLock);
1169 len = strlen(cellp->name)+1;
1170 *a_name = (char *)xdr_alloc(len);
1172 memcpy(*a_name, cellp->name, len);
1174 for ( sn = 0, serverRefp = cellp->vlServersp;
1175 sn < AFSMAXCELLHOSTS && serverRefp;
1176 sn++, serverRefp = serverRefp->next);
1178 a_hosts->serverList_len = sn;
1179 a_hosts->serverList_val = (afs_int32 *)xdr_alloc(sn * sizeof(afs_int32));
1181 for ( sn = 0, serverRefp = cellp->vlServersp;
1182 sn < AFSMAXCELLHOSTS && serverRefp;
1183 sn++, serverRefp = serverRefp->next)
1185 a_hosts->serverList_val[sn] = ntohl(serverRefp->server->addr.sin_addr.s_addr);
1188 lock_ReleaseRead(&cm_serverLock);
1192 /* debug interface */
1194 SRXAFSCB_GetCellByNum(struct rx_call *callp, afs_int32 a_cellnum,
1195 char **a_name, serverList *a_hosts)
1197 struct rx_connection *connp;
1198 struct rx_peer *peerp;
1199 unsigned long host = 0;
1200 unsigned short port = 0;
1206 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1207 host = rx_HostOf(peerp);
1208 port = rx_PortOf(peerp);
1211 osi_Log3(afsd_logp, "SRXAFSCB_GetCellByNum(%d) from host 0x%x port %d",
1212 a_cellnum, ntohl(host), ntohs(port));
1214 a_hosts->serverList_val = 0;
1215 a_hosts->serverList_len = 0;
1218 rc = GetCellCommon(a_cellnum, a_name, a_hosts);
1223 /* debug interface */
1225 SRXAFSCB_TellMeAboutYourself( struct rx_call *callp,
1226 struct interfaceAddr *addr,
1227 Capabilities * capabilities)
1230 afs_uint32 *dataBuffP;
1231 afs_int32 dataBytes;
1233 struct rx_connection *connp;
1234 struct rx_peer *peerp;
1235 unsigned long host = 0;
1236 unsigned short port = 0;
1241 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1242 host = rx_HostOf(peerp);
1243 port = rx_PortOf(peerp);
1246 osi_Log2(afsd_logp, "SRXAFSCB_TellMeAboutYourself from host 0x%x port %d",
1250 lock_ObtainRead(&cm_syscfgLock);
1251 if (cm_LanAdapterChangeDetected) {
1252 lock_ConvertRToW(&cm_syscfgLock);
1253 if (cm_LanAdapterChangeDetected) {
1254 /* get network related info */
1255 cm_noIPAddr = CM_MAXINTERFACE_ADDR;
1256 code = syscfg_GetIFInfo(&cm_noIPAddr,
1257 cm_IPAddr, cm_SubnetMask,
1258 cm_NetMtu, cm_NetFlags);
1259 cm_LanAdapterChangeDetected = 0;
1261 lock_ConvertWToR(&cm_syscfgLock);
1264 /* return all network interface addresses */
1265 addr->numberOfInterfaces = cm_noIPAddr;
1266 addr->uuid = cm_data.Uuid;
1267 for ( i=0; i < cm_noIPAddr; i++ ) {
1268 addr->addr_in[i] = cm_IPAddr[i];
1269 addr->subnetmask[i] = cm_SubnetMask[i];
1270 addr->mtu[i] = (rx_mtu == -1 || (rx_mtu != -1 && cm_NetMtu[i] < rx_mtu)) ?
1271 cm_NetMtu[i] : rx_mtu;
1273 lock_ReleaseRead(&cm_syscfgLock);
1275 dataBytes = 1 * sizeof(afs_uint32);
1276 dataBuffP = (afs_uint32 *) xdr_alloc(dataBytes);
1277 dataBuffP[0] = CLIENT_CAPABILITY_ERRORTRANS;
1278 capabilities->Capabilities_len = dataBytes / sizeof(afs_uint32);
1279 capabilities->Capabilities_val = dataBuffP;
1284 /*------------------------------------------------------------------------
1285 * EXPORTED SRXAFSCB_GetServerPrefs
1288 * Routine to list server preferences used by this client.
1291 * a_call : Ptr to Rx call on which this request came in.
1292 * a_index : Input server index
1293 * a_srvr_addr : Output server address (0xffffffff on last server)
1294 * a_srvr_rank : Output server rank
1300 * Nothing interesting.
1304 *------------------------------------------------------------------------*/
1306 int SRXAFSCB_GetServerPrefs(
1307 struct rx_call *callp,
1309 afs_int32 *a_srvr_addr,
1310 afs_int32 *a_srvr_rank)
1312 struct rx_connection *connp;
1313 struct rx_peer *peerp;
1314 unsigned long host = 0;
1315 unsigned short port = 0;
1320 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1321 host = rx_HostOf(peerp);
1322 port = rx_PortOf(peerp);
1325 osi_Log2(afsd_logp, "SRXAFSCB_GetServerPrefs from host 0x%x port %d - not implemented",
1329 *a_srvr_addr = 0xffffffff;
1330 *a_srvr_rank = 0xffffffff;
1335 /*------------------------------------------------------------------------
1336 * EXPORTED SRXAFSCB_GetCellServDB
1339 * Routine to list cells configured for this client
1342 * a_call : Ptr to Rx call on which this request came in.
1343 * a_index : Input cell index
1344 * a_name : Output cell name ("" on last cell)
1345 * a_hosts : Output cell database servers
1351 * Nothing interesting.
1355 *------------------------------------------------------------------------*/
1357 int SRXAFSCB_GetCellServDB(struct rx_call *callp, afs_int32 index, char **a_name,
1358 serverList *a_hosts)
1360 struct rx_connection *connp;
1361 struct rx_peer *peerp;
1362 unsigned long host = 0;
1363 unsigned short port = 0;
1369 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1370 host = rx_HostOf(peerp);
1371 port = rx_PortOf(peerp);
1374 osi_Log2(afsd_logp, "SRXAFSCB_GetCellServDB from host 0x%x port %d - not implemented",
1375 ntohl(host), ntohs(port));
1377 #ifdef AFS_FREELANCE_CLIENT
1378 if (cm_freelanceEnabled && index == 0) {
1379 rc = GetCellCommon(AFS_FAKE_ROOT_CELL_ID, a_name, a_hosts);
1383 rc = GetCellCommon(index+1, a_name, a_hosts);
1388 /*------------------------------------------------------------------------
1389 * EXPORTED SRXAFSCB_GetLocalCell
1392 * Routine to return name of client's local cell
1395 * a_call : Ptr to Rx call on which this request came in.
1396 * a_name : Output cell name
1402 * Nothing interesting.
1406 *------------------------------------------------------------------------*/
1408 int SRXAFSCB_GetLocalCell(struct rx_call *callp, char **a_name)
1411 struct rx_connection *connp;
1412 struct rx_peer *peerp;
1413 unsigned long host = 0;
1414 unsigned short port = 0;
1420 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1421 host = rx_HostOf(peerp);
1422 port = rx_PortOf(peerp);
1425 osi_Log2(afsd_logp, "SRXAFSCB_GetLocalCell from host 0x%x port %d",
1426 ntohl(host), ntohs(port));
1428 if (cm_data.rootCellp) {
1429 len = strlen(cm_data.rootCellp->name) + 1;
1430 t_name = (char *)xdr_alloc(len);
1432 memcpy(t_name, cm_data.rootCellp->name, len);
1434 t_name = (char *)xdr_alloc(1);
1444 * afs_MarshallCacheConfig - marshall client cache configuration
1448 * IN callerVersion - the rpc stat version of the caller.
1450 * IN config - client cache configuration.
1452 * OUT ptr - buffer where configuration is marshalled.
1458 static void afs_MarshallCacheConfig(
1459 afs_uint32 callerVersion,
1460 cm_initparams_v1 *config,
1464 * We currently only support version 1.
1466 *(ptr++) = config->nChunkFiles;
1467 *(ptr++) = config->nStatCaches;
1468 *(ptr++) = config->nDataCaches;
1469 *(ptr++) = config->nVolumeCaches;
1470 *(ptr++) = config->firstChunkSize;
1471 *(ptr++) = config->otherChunkSize;
1472 *(ptr++) = config->cacheSize;
1473 *(ptr++) = config->setTime;
1474 *(ptr++) = config->memCache;
1479 /*------------------------------------------------------------------------
1480 * EXPORTED SRXAFSCB_GetCacheConfig
1483 * Routine to return parameters used to initialize client cache.
1484 * Client may request any format version. Server may not return
1485 * format version greater than version requested by client.
1488 * a_call: Ptr to Rx call on which this request came in.
1489 * callerVersion: Data format version desired by the client.
1490 * serverVersion: Data format version of output data.
1491 * configCount: Number bytes allocated for output data.
1492 * config: Client cache configuration.
1498 * Nothing interesting.
1502 *------------------------------------------------------------------------*/
1504 int SRXAFSCB_GetCacheConfig(struct rx_call *callp,
1505 afs_uint32 callerVersion,
1506 afs_uint32 *serverVersion,
1507 afs_uint32 *configCount,
1508 cacheConfig *config)
1510 afs_uint32 *t_config;
1512 extern cm_initparams_v1 cm_initParams;
1513 struct rx_connection *connp;
1514 struct rx_peer *peerp;
1515 unsigned long host = 0;
1516 unsigned short port = 0;
1521 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1522 host = rx_HostOf(peerp);
1523 port = rx_PortOf(peerp);
1526 osi_Log2(afsd_logp, "SRXAFSCB_GetCacheConfig from host 0x%x port %d - version 1 only",
1527 ntohl(host), ntohs(port));
1530 * Currently only support version 1
1532 allocsize = sizeof(cm_initparams_v1);
1533 t_config = (afs_uint32 *)xdr_alloc(allocsize);
1535 afs_MarshallCacheConfig(callerVersion, &cm_initParams, t_config);
1537 *serverVersion = AFS_CLIENT_RETRIEVAL_FIRST_EDITION;
1540 #define SIZE_MAX UINT_MAX
1542 osi_assertx(allocsize < SIZE_MAX, "allocsize >= SIZE_MAX");
1544 *configCount = (afs_uint32)allocsize;
1545 config->cacheConfig_val = t_config;
1546 config->cacheConfig_len = (*configCount)/sizeof(afs_uint32);
1551 /* called by afsd without any locks to initialize this module */
1552 void cm_InitCallback(void)
1554 lock_InitializeRWLock(&cm_callbackLock, "cm_callbackLock", LOCK_HIERARCHY_CALLBACK_GLOBAL);
1555 cm_activeCallbackGrantingCalls = 0;
1558 /* called with locked scp; tells us whether we've got a callback.
1559 * Expirations are checked by a background daemon so as to make
1560 * this function as inexpensive as possible
1562 int cm_HaveCallback(cm_scache_t *scp)
1564 #ifdef AFS_FREELANCE_CLIENT
1565 if (cm_freelanceEnabled &&
1566 scp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
1567 scp->fid.volume==AFS_FAKE_ROOT_VOL_ID) {
1568 if (cm_getLocalMountPointChange()) {
1569 cm_clearLocalMountPointChange();
1570 lock_ReleaseWrite(&scp->rw);
1571 cm_reInitLocalMountPoints();
1572 lock_ObtainWrite(&scp->rw);
1574 return (cm_data.fakeDirVersion == scp->dataVersion);
1577 if (cm_readonlyVolumeVersioning &&
1578 (scp->flags & CM_SCACHEFLAG_PURERO)) {
1579 cm_volume_t *volp = cm_GetVolumeByFID(&scp->fid);
1582 if (cm_OfflineROIsValid) {
1583 switch (cm_GetVolumeStatus(volp, scp->fid.volume)) {
1591 if (cm_readonlyVolumeVersioning &&
1593 volp->creationDateRO == scp->volumeCreationDate &&
1594 volp->cbServerpRO != NULL) {
1601 if (scp->cbServerp != NULL)
1607 /* need to detect a broken callback that races with our obtaining a callback.
1608 * Need to be able to do this even if we don't know the file ID of the file
1609 * we're breaking the callback on at the time we start the acquisition of the
1610 * callback (as in the case where we are creating a file).
1612 * So, we start by writing down the count of the # of callbacks we've received
1613 * so far, and bumping a global counter of the # of callback granting calls
1614 * outstanding (all done under cm_callbackLock).
1616 * When we're back from the call, we look at all of the callback revokes with
1617 * counter numbers greater than the one we recorded in our caller's structure,
1618 * and replay those that are higher than when we started the call.
1620 * We free all the structures in the queue when the count of the # of outstanding
1621 * callback-granting calls drops to zero.
1623 * We call this function with the scp locked, too, but in its current implementation,
1624 * this knowledge is not used.
1626 void cm_StartCallbackGrantingCall(cm_scache_t *scp, cm_callbackRequest_t *cbrp)
1628 lock_ObtainWrite(&cm_callbackLock);
1629 cbrp->callbackCount = cm_callbackCount;
1630 cm_activeCallbackGrantingCalls++;
1631 cbrp->startTime = time(NULL);
1632 cbrp->serverp = NULL;
1633 lock_ReleaseWrite(&cm_callbackLock);
1636 /* Called at the end of a callback-granting call, to remove the callback
1637 * info from the scache entry, if necessary.
1639 * Called with scp write locked, so we can discard the callbacks easily with
1640 * this locking hierarchy.
1642 * Performs cleanup of the stack allocated cm_callbackRequest_t object.
1644 * Returns 0 on success and non-zero if the callback lost a race.
1647 cm_EndCallbackGrantingCall(cm_scache_t *scp, cm_callbackRequest_t *cbrp,
1648 AFSCallBack *cbp, AFSVolSync *volSyncp, long flags)
1650 cm_racingRevokes_t *revp; /* where we are */
1651 cm_racingRevokes_t *nrevp; /* where we'll be next */
1652 int freeRacingRevokes;
1654 cm_server_t * serverp = NULL;
1657 lock_ObtainWrite(&cm_callbackLock);
1658 if (flags & CM_CALLBACK_MAINTAINCOUNT) {
1659 osi_assertx(cm_activeCallbackGrantingCalls > 0,
1660 "CM_CALLBACK_MAINTAINCOUNT && cm_activeCallbackGrantingCalls == 0");
1664 osi_assertx(cm_activeCallbackGrantingCalls-- > 0,
1665 "!CM_CALLBACK_MAINTAINCOUNT && cm_activeCallbackGrantingCalls == 0");
1668 if (cm_activeCallbackGrantingCalls == 0)
1669 freeRacingRevokes = 1;
1671 freeRacingRevokes = 0;
1674 * a callback was revoked during our granting call, so
1675 * run down the list of revoked fids, looking for ours.
1676 * If activeCallbackGrantingCalls is zero, free the elements, too.
1678 * May need to go through entire list just to do the freeing.
1680 for (revp = cm_racingRevokesp; revp; revp = nrevp) {
1681 nrevp = (cm_racingRevokes_t *) osi_QNext(&revp->q);
1682 /* if this callback came in later than when we started the
1683 * callback-granting call, and if this fid is the right fid,
1684 * then clear the callback.
1686 if (scp && cbrp && cbrp->callbackCount != cm_callbackCount
1687 && revp->callbackCount > cbrp->callbackCount
1688 && (( scp->fid.volume == revp->fid.volume &&
1689 scp->fid.vnode == revp->fid.vnode &&
1690 scp->fid.unique == revp->fid.unique)
1692 ((revp->flags & CM_RACINGFLAG_CANCELVOL) &&
1693 scp->fid.volume == revp->fid.volume)
1695 ((revp->flags & CM_RACINGFLAG_CANCELALL) &&
1696 (revp->fid.cell == 0 || scp->fid.cell == revp->fid.cell)))) {
1697 /* this one matches */
1699 "Racing revoke scp 0x%p old cbc %d rev cbc %d cur cbc %d",
1701 cbrp->callbackCount, revp->callbackCount,
1704 if ((scp->flags & CM_SCACHEFLAG_PURERO) &&
1705 (revp->flags & CM_RACINGFLAG_ALL))
1706 cm_callbackDiscardROVolumeByFID(&scp->fid);
1708 if (freeRacingRevokes)
1712 /* if we freed the list, zap the pointer to it */
1713 if (freeRacingRevokes)
1714 cm_racingRevokesp = NULL;
1715 lock_ReleaseWrite(&cm_callbackLock);
1717 /* record the callback if we didn't lose it */
1718 if (!lostRace && scp) {
1720 if (!cm_ServerEqual(scp->cbServerp, cbrp->serverp)) {
1721 serverp = scp->cbServerp;
1722 scp->cbServerp = cbrp->serverp;
1724 cbrp->serverp = NULL;
1726 cm_GetServer(scp->cbServerp);
1728 } else if (freeServer) {
1729 serverp = cbrp->serverp;
1730 cbrp->serverp = NULL;
1732 scp->cbExpires = cbrp->startTime + cbp->ExpirationTime;
1735 if (scp->flags & CM_SCACHEFLAG_PURERO) {
1736 cm_volume_t * volp = cm_GetVolumeByFID(&scp->fid);
1739 lock_ObtainWrite(&cm_scacheLock);
1740 volp->cbExpiresRO = scp->cbExpires;
1741 volp->creationDateRO = volSyncp->spare1;
1742 if (volp->cbServerpRO != scp->cbServerp) {
1743 if (volp->cbServerpRO)
1744 cm_PutServer(volp->cbServerpRO);
1745 cm_GetServer(scp->cbServerp);
1746 volp->cbServerpRO = scp->cbServerp;
1748 lock_ReleaseWrite(&cm_scacheLock);
1757 * No need to discard the cm_scache object or notify the
1758 * afs redirector or smb client about a change if we did lose
1759 * the race. That was done when the callback was processed in
1760 * cm_RevokeCallback().
1762 if (cbrp && freeServer) {
1763 serverp = cbrp->serverp;
1764 cbrp->serverp = NULL;
1769 lock_ObtainWrite(&cm_serverLock);
1770 cm_FreeServer(serverp);
1771 lock_ReleaseWrite(&cm_serverLock);
1777 /* if flags is 1, we want to force the code to make one call, anyway.
1778 * called with locked scp; returns with same.
1780 long cm_GetCallback(cm_scache_t *scp, struct cm_user *userp,
1781 struct cm_req *reqp, long flags)
1784 cm_conn_t *connp = NULL;
1785 AFSFetchStatus afsStatus;
1787 AFSCallBack callback;
1789 cm_callbackRequest_t cbr;
1792 struct rx_connection * rxconnp = NULL;
1793 int syncop_done = 0;
1795 memset(&volSync, 0, sizeof(volSync));
1797 osi_Log4(afsd_logp, "GetCallback scp 0x%p cell %d vol %d flags %lX",
1798 scp, scp->fid.cell, scp->fid.volume, flags);
1800 #ifdef AFS_FREELANCE_CLIENT
1801 // The case where a callback is needed on /afs is handled
1802 // specially. We need to fetch the status by calling
1804 if (cm_freelanceEnabled &&
1805 (scp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
1806 scp->fid.volume==AFS_FAKE_ROOT_VOL_ID)) {
1808 code = cm_SyncOp(scp, NULL, userp, reqp, 0,
1809 CM_SCACHESYNC_FETCHSTATUS | CM_SCACHESYNC_GETCALLBACK);
1814 if (scp->dataVersion != cm_data.fakeDirVersion) {
1815 memset(&afsStatus, 0, sizeof(afsStatus));
1816 memset(&volSync, 0, sizeof(volSync));
1817 InterlockedIncrement(&scp->activeRPCs);
1819 // Fetch the status info
1820 cm_MergeStatus(NULL, scp, &afsStatus, &volSync, userp, reqp, 0);
1824 #endif /* AFS_FREELANCE_CLIENT */
1826 mustCall = (flags & 1);
1827 cm_AFSFidFromFid(&tfid, &scp->fid);
1829 if (!mustCall && cm_HaveCallback(scp))
1832 /* turn off mustCall, since it has now forced us past the check above */
1835 /* otherwise, we have to make an RPC to get the status */
1837 code = cm_SyncOp(scp, NULL, userp, reqp, 0,
1838 CM_SCACHESYNC_FETCHSTATUS | CM_SCACHESYNC_GETCALLBACK);
1843 cm_StartCallbackGrantingCall(scp, &cbr);
1845 lock_ReleaseWrite(&scp->rw);
1847 /* now make the RPC */
1848 InterlockedIncrement(&scp->activeRPCs);
1849 osi_Log4(afsd_logp, "CALL FetchStatus scp 0x%p vol %u vn %u uniq %u",
1850 scp, sfid.volume, sfid.vnode, sfid.unique);
1852 code = cm_ConnFromFID(&sfid, userp, reqp, &connp);
1856 rxconnp = cm_GetRxConn(connp);
1857 code = RXAFS_FetchStatus(rxconnp, &tfid,
1858 &afsStatus, &callback, &volSync);
1859 rx_PutConnection(rxconnp);
1861 } while (cm_Analyze(connp, userp, reqp, &sfid, 0, &volSync, NULL,
1863 code = cm_MapRPCError(code, reqp);
1865 osi_Log4(afsd_logp, "CALL FetchStatus FAILURE code 0x%x scp 0x%p vol %u vn %u",
1866 code, scp, scp->fid.volume, scp->fid.vnode);
1868 osi_Log4(afsd_logp, "CALL FetchStatus SUCCESS scp 0x%p vol %u vn %u uniq %u",
1869 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1871 lock_ObtainWrite(&scp->rw);
1873 int lostRace = cm_EndCallbackGrantingCall(scp, &cbr, &callback, &volSync, 0);
1875 cm_MergeStatus(NULL, scp, &afsStatus, &volSync, userp, reqp, 0);
1877 cm_EndCallbackGrantingCall(NULL, &cbr, NULL, NULL, 0);
1878 InterlockedDecrement(&scp->activeRPCs);
1881 /* if we got an error, return to caller */
1888 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_FETCHSTATUS | CM_SCACHESYNC_GETCALLBACK);
1891 osi_Log2(afsd_logp, "GetCallback Failed code 0x%x scp 0x%p -->",code, scp);
1892 osi_Log4(afsd_logp, " cell %u vol %u vn %u uniq %u",
1893 scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1895 osi_Log3(afsd_logp, "GetCallback Complete scp 0x%p cell %d vol %d",
1896 scp, scp->fid.cell, scp->fid.volume);
1904 * cm_CBServersDownTime() returns 1 if the downTime parameter is valid.
1906 * Servers with multiple interfaces have multiple cm_server_t objects
1907 * which share the same UUID. If one interface is down but others are up,
1908 * the server should not be considered down. The returned downTime should
1909 * be the largest non-zero value if down or zero if up. If the cbServerp
1910 * is down, it is updated to refer to an interface that is up (if one exists).
1912 * called with cm_scacheLock held
1915 cm_CBServersDownTime(cm_scache_t *scp, cm_volume_t *volp, time_t * pdownTime)
1917 cm_vol_state_t *statep;
1918 cm_serverRef_t *tsrp;
1920 time_t downTime = 0;
1921 cm_server_t * upserver = NULL;
1922 cm_server_t * downserver;
1926 if (scp->cbServerp == NULL)
1929 if (!(scp->cbServerp->flags & CM_SERVERFLAG_DOWN))
1932 statep = cm_VolumeStateByID(volp, scp->fid.volume);
1934 for (tsrp = statep->serversp; tsrp; tsrp=tsrp->next) {
1935 if (tsrp->status == srv_deleted)
1938 if (!cm_ServerEqual(tsrp->server, scp->cbServerp))
1941 if (!(tsrp->server->flags & CM_SERVERFLAG_DOWN)) {
1944 upserver = tsrp->server;
1945 cm_GetServer(upserver);
1949 if (tsrp->server->downTime > downTime)
1950 downTime = tsrp->server->downTime;
1953 downTime = scp->cbServerp->downTime;
1956 /* if the cbServerp does not match the current volume server list
1957 * we report the callback server as up so the callback can be
1962 *pdownTime = downTime;
1964 lock_ObtainWrite(&scp->rw);
1965 downserver = scp->cbServerp;
1966 scp->cbServerp = upserver;
1967 lock_ReleaseWrite(&scp->rw);
1968 cm_PutServer(downserver);
1973 /* called periodically by cm_daemon to shut down use of expired callbacks */
1974 void cm_CheckCBExpiration(void)
1979 enum volstatus volstate;
1980 time_t now, downTime;
1982 osi_Log0(afsd_logp, "CheckCBExpiration");
1985 lock_ObtainWrite(&cm_scacheLock);
1986 for (i=0; i<cm_data.scacheHashTableSize; i++) {
1987 for (scp = cm_data.scacheHashTablep[i]; scp; scp=scp->nextp) {
1989 cm_HoldSCacheNoLock(scp);
1990 lock_ReleaseWrite(&cm_scacheLock);
1993 * If this is not a PURERO object and there is no callback
1994 * or it hasn't expired, there is nothing to do
1996 if (!(scp->flags & CM_SCACHEFLAG_PURERO) &&
1997 (scp->cbServerp == NULL || scp->cbExpires == 0 || now < scp->cbExpires))
2001 * Determine the volume state and update the callback info
2002 * to the latest if it is a PURERO object.
2004 volp = cm_GetVolumeByFID(&scp->fid);
2005 volstate = vl_unknown;
2008 if ((scp->flags & CM_SCACHEFLAG_PURERO) &&
2009 volp->cbExpiresRO > scp->cbExpires && scp->cbExpires > 0)
2011 lock_ObtainWrite(&scp->rw);
2012 scp->cbExpires = volp->cbExpiresRO;
2013 if (volp->cbServerpRO != scp->cbServerp) {
2015 cm_PutServer(scp->cbServerp);
2016 cm_GetServer(volp->cbServerpRO);
2017 scp->cbServerp = volp->cbServerpRO;
2019 lock_ReleaseWrite(&scp->rw);
2021 volstate = cm_GetVolumeStatus(volp, scp->fid.volume);
2024 /* If there is no callback or it hasn't expired, there is nothing to do */
2025 if (scp->cbServerp == NULL || scp->cbExpires == 0 || now < scp->cbExpires)
2028 /* If the volume is known not to be online, do not expire the callback */
2029 if (volstate != vl_online)
2033 * If all the servers are down and the callback expired after the
2034 * issuing server went down, do not expire the callback
2036 if (cm_CBServersDownTime(scp, volp, &downTime) && downTime && downTime < scp->cbExpires)
2039 /* The callback has expired, discard the status info */
2040 osi_Log4(afsd_logp, "Callback Expiration Discarding SCache scp 0x%p vol %u vn %u uniq %u",
2041 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
2042 lock_ObtainWrite(&scp->rw);
2043 cm_DiscardSCache(scp);
2044 lock_ReleaseWrite(&scp->rw);
2046 if (RDR_Initialized)
2047 RDR_InvalidateObject(scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique,
2048 scp->fid.hash, scp->fileType, AFS_INVALIDATE_EXPIRED);
2050 cm_CallbackNotifyChange(scp);
2056 lock_ObtainWrite(&cm_scacheLock);
2057 cm_ReleaseSCacheNoLock(scp);
2060 lock_ReleaseWrite(&cm_scacheLock);
2062 osi_Log0(afsd_logp, "CheckCBExpiration Complete");
2067 cm_GiveUpAllCallbacks(cm_server_t *tsp, afs_int32 markDown)
2071 struct rx_connection * rxconnp;
2073 if ((tsp->type == CM_SERVER_FILE) && !(tsp->flags & CM_SERVERFLAG_DOWN))
2075 code = cm_ConnByServer(tsp, cm_rootUserp, FALSE, &connp);
2077 rxconnp = cm_GetRxConn(connp);
2078 rx_SetConnDeadTime(rxconnp, 10);
2079 code = RXAFS_GiveUpAllCallBacks(rxconnp);
2080 rx_SetConnDeadTime(rxconnp, ConnDeadtimeout);
2081 rx_PutConnection(rxconnp);
2085 cm_server_vols_t * tsrvp;
2089 cm_ForceNewConnections(tsp);
2091 lock_ObtainMutex(&tsp->mx);
2092 if (!(tsp->flags & CM_SERVERFLAG_DOWN)) {
2093 _InterlockedOr(&tsp->flags, CM_SERVERFLAG_DOWN);
2094 tsp->downTime = time(NULL);
2096 /* Now update the volume status */
2097 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
2098 for (i=0; i<NUM_SERVER_VOLS; i++) {
2099 if (tsrvp->ids[i] != 0) {
2103 lock_ReleaseMutex(&tsp->mx);
2104 code = cm_FindVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
2105 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE | CM_GETVOL_FLAG_NO_RESET, &volp);
2106 lock_ObtainMutex(&tsp->mx);
2108 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
2114 lock_ReleaseMutex(&tsp->mx);
2120 cm_GiveUpAllCallbacksAllServers(afs_int32 markDown)
2124 if (!cm_giveUpAllCBs)
2127 lock_ObtainRead(&cm_serverLock);
2128 for (tsp = cm_allServersp; tsp; tsp = tsp->allNextp) {
2129 cm_GetServerNoLock(tsp);
2130 lock_ReleaseRead(&cm_serverLock);
2131 cm_GiveUpAllCallbacks(tsp, markDown);
2132 lock_ObtainRead(&cm_serverLock);
2133 cm_PutServerNoLock(tsp);
2135 lock_ReleaseRead(&cm_serverLock);
2139 cm_GiveUpAllCallbacksAllServersMulti(afs_int32 markDown)
2142 cm_conn_t **conns = NULL;
2143 struct rx_connection **rxconns = NULL;
2144 afs_int32 i, nconns = 0, maxconns;
2145 cm_server_t ** serversp, *tsp;
2147 time_t start, *deltas;
2149 maxconns = cm_numFileServers;
2153 conns = (cm_conn_t **)malloc(maxconns * sizeof(cm_conn_t *));
2154 rxconns = (struct rx_connection **)malloc(maxconns * sizeof(struct rx_connection *));
2155 deltas = (time_t *)malloc(maxconns * sizeof (time_t));
2156 results = (afs_int32 *)malloc(maxconns * sizeof (afs_int32));
2157 serversp = (cm_server_t **)malloc(maxconns * sizeof(cm_server_t *));
2159 lock_ObtainRead(&cm_serverLock);
2160 for (nconns=0, tsp = cm_allServersp; tsp && nconns < maxconns; tsp = tsp->allNextp) {
2161 if (tsp->type != CM_SERVER_FILE ||
2162 (tsp->flags & CM_SERVERFLAG_DOWN) ||
2163 tsp->cellp == NULL /* SetPrefs only */)
2166 cm_GetServerNoLock(tsp);
2167 lock_ReleaseRead(&cm_serverLock);
2169 serversp[nconns] = tsp;
2170 code = cm_ConnByServer(tsp, cm_rootUserp, FALSE, &conns[nconns]);
2172 lock_ObtainRead(&cm_serverLock);
2173 cm_PutServerNoLock(tsp);
2176 lock_ObtainRead(&cm_serverLock);
2177 rxconns[nconns] = cm_GetRxConn(conns[nconns]);
2178 rx_SetConnDeadTime(rxconns[nconns], 10);
2182 lock_ReleaseRead(&cm_serverLock);
2185 /* Perform the multi call */
2187 multi_Rx(rxconns,nconns)
2189 multi_RXAFS_GiveUpAllCallBacks();
2190 results[multi_i]=multi_error;
2194 /* Process results of servers that support RXAFS_GetCapabilities */
2195 for (i=0; i<nconns; i++) {
2196 rx_SetConnDeadTime(rxconns[i], ConnDeadtimeout);
2197 rx_PutConnection(rxconns[i]);
2198 cm_PutConn(conns[i]);
2201 cm_GCConnections(tsp);
2204 cm_server_vols_t * tsrvp;
2208 cm_ForceNewConnections(tsp);
2210 lock_ObtainMutex(&tsp->mx);
2211 if (!(tsp->flags & CM_SERVERFLAG_DOWN)) {
2212 _InterlockedOr(&tsp->flags, CM_SERVERFLAG_DOWN);
2213 tsp->downTime = time(NULL);
2215 /* Now update the volume status */
2216 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
2217 for (i=0; i<NUM_SERVER_VOLS; i++) {
2218 if (tsrvp->ids[i] != 0) {
2222 lock_ReleaseMutex(&tsp->mx);
2223 code = cm_FindVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
2224 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE | CM_GETVOL_FLAG_NO_RESET, &volp);
2225 lock_ObtainMutex(&tsp->mx);
2227 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
2233 lock_ReleaseMutex(&tsp->mx);