2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
10 #include <afs/param.h>
11 #include <afs/afs_args.h>
22 #include <rx_pthread.h>
24 #include <WINNT/syscfg.h>
25 #include <WINNT/afsreg.h>
26 #include <../afsrdr/kif.h>
28 /*extern void afsi_log(char *pattern, ...);*/
30 /* read/write lock for all global storage in this module */
31 osi_rwlock_t cm_callbackLock;
33 afs_int32 cm_OfflineROIsValid = 0;
35 afs_int32 cm_giveUpAllCBs = 0;
37 #ifdef AFS_FREELANCE_CLIENT
38 extern osi_mutex_t cm_Freelance_Lock;
41 /* count of # of callback breaking messages received by this CM so far. We use
42 * this count in determining whether there have been any callback breaks that
43 * apply to a call that returned a new callback. If the counter doesn't
44 * increase during a call, then we know that no callbacks were broken during
45 * that call, and thus that the callback that was just returned is still valid.
47 long cm_callbackCount;
49 /* count of number of RPCs potentially returning a callback executing now.
50 * When this counter hits zero, we can clear out the racing revokes list, since
51 * at that time, we know that none of the just-executed callback revokes will
52 * apply to any future call that returns a callback (since the latter hasn't
53 * even started execution yet).
55 long cm_activeCallbackGrantingCalls;
57 /* list of callbacks that have been broken recently. If a call returning a
58 * callback is executing and a callback revoke runs immediately after it at the
59 * server, the revoke may end up being processed before the response to the
60 * original callback granting call. We detect this by keeping a list of
61 * callback revokes that have been received since we *started* the callback
62 * granting call, and discarding any callbacks received for the same file ID,
63 * even if the callback revoke was received before the callback grant.
65 cm_racingRevokes_t *cm_racingRevokesp;
67 /* record a (potentially) racing revoke for this file ID; null means for all
68 * file IDs, and is used by InitCallBackState.
70 * The cancelFlags describe whether we're just discarding callbacks for the same
71 * file ID, the same volume, or all from the same server.
73 * Called with no locks held.
75 void cm_RecordRacingRevoke(cm_fid_t *fidp, long cancelFlags)
77 cm_racingRevokes_t *rp;
79 lock_ObtainWrite(&cm_callbackLock);
81 osi_Log3(afsd_logp, "RecordRacingRevoke Volume %d Flags %lX activeCalls %d",
82 fidp ? fidp->volume : 0, cancelFlags, cm_activeCallbackGrantingCalls);
84 if (cm_activeCallbackGrantingCalls > 0) {
85 rp = malloc(sizeof(*rp));
86 memset(rp, 0, sizeof(*rp));
87 osi_QAdd((osi_queue_t **) &cm_racingRevokesp, &rp->q);
88 rp->flags |= (cancelFlags & CM_RACINGFLAG_ALL);
89 if (fidp) rp->fid = *fidp;
90 rp->callbackCount = ++cm_callbackCount;
92 lock_ReleaseWrite(&cm_callbackLock);
96 * When we lose a callback, may have to send change notification replies.
97 * Do not call with a lock on the scp.
99 void cm_CallbackNotifyChange(cm_scache_t *scp)
105 /* why does this have to query the registry each time? */
106 if (RegOpenKeyEx( HKEY_LOCAL_MACHINE,
107 AFSREG_CLT_OPENAFS_SUBKEY,
109 KEY_READ|KEY_QUERY_VALUE,
110 &hKey) == ERROR_SUCCESS) {
112 dummyLen = sizeof(DWORD);
113 RegQueryValueEx(hKey, "CallBack Notify Change Delay", NULL, NULL,
114 (BYTE *) &dwDelay, &dummyLen);
118 if (dwDelay > 5000) /* do not allow a delay of more then 5 seconds */
121 osi_Log3(afsd_logp, "CallbackNotifyChange FileType %d Flags %lX Delay %dms",
122 scp->fileType, scp->flags, dwDelay);
127 /* for directories, this sends a change notification on the dir itself */
128 if (scp->fileType == CM_SCACHETYPE_DIRECTORY) {
130 if (scp->flags & CM_SCACHEFLAG_ANYWATCH)
132 FILE_NOTIFY_GENERIC_DIRECTORY_FILTER,
133 scp, NULL, NULL, TRUE);
135 dc_break_callback(FID_HASH_FN(&scp->fid));
138 /* and for files, this sends a change notification on the file's parent dir */
142 tfid.cell = scp->fid.cell;
143 tfid.volume = scp->fid.volume;
144 tfid.vnode = scp->parentVnode;
145 tfid.unique = scp->parentUnique;
146 dscp = cm_FindSCache(&tfid);
149 dscp->flags & CM_SCACHEFLAG_ANYWATCH )
151 FILE_NOTIFY_GENERIC_FILE_FILTER,
152 dscp, NULL, NULL, TRUE);
155 dc_break_callback(FID_HASH_FN(&dscp->fid));
158 cm_ReleaseSCache(dscp);
162 /* called with no locks held for every file ID that is revoked directly by
163 * a callback revoke call. Does not have to handle volume callback breaks,
164 * since those have already been split out.
166 * The callp parameter is currently unused.
168 void cm_RevokeCallback(struct rx_call *callp, cm_cell_t * cellp, AFSFid *fidp)
174 /* don't bother setting cell, since we won't be checking it (to aid
175 * in working with multi-homed servers: we don't know the cell if we
176 * don't recognize the IP address).
179 tfid.volume = fidp->Volume;
180 tfid.vnode = fidp->Vnode;
181 tfid.unique = fidp->Unique;
182 hash = CM_SCACHE_HASH(&tfid);
184 osi_Log3(afsd_logp, "RevokeCallback vol %u vn %u uniq %u",
185 fidp->Volume, fidp->Vnode, fidp->Unique);
187 /* do this first, so that if we're executing a callback granting call
188 * at this moment, we kill it before it can be merged in. Otherwise,
189 * it could complete while we're doing the scan below, and get missed
190 * by both the scan and by this code.
192 cm_RecordRacingRevoke(&tfid, 0);
194 lock_ObtainWrite(&cm_scacheLock);
195 /* do all in the hash bucket, since we don't know how many we'll find with
198 for (scp = cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
199 if (scp->fid.volume == tfid.volume &&
200 scp->fid.vnode == tfid.vnode &&
201 scp->fid.unique == tfid.unique &&
202 (cellp == NULL || scp->fid.cell == cellp->cellID) &&
203 scp->cbExpires > 0 &&
204 scp->cbServerp != NULL)
206 cm_HoldSCacheNoLock(scp);
207 lock_ReleaseWrite(&cm_scacheLock);
208 osi_Log4(afsd_logp, "RevokeCallback Discarding SCache scp 0x%p vol %u vn %u uniq %u",
209 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
211 lock_ObtainMutex(&scp->mx);
212 cm_DiscardSCache(scp);
213 lock_ReleaseMutex(&scp->mx);
215 cm_CallbackNotifyChange(scp);
217 lock_ObtainWrite(&cm_scacheLock);
218 cm_ReleaseSCacheNoLock(scp);
221 lock_ReleaseWrite(&cm_scacheLock);
223 osi_Log3(afsd_logp, "RevokeCallback Complete vol %u vn %u uniq %u",
224 fidp->Volume, fidp->Vnode, fidp->Unique);
227 /* called to revoke a volume callback, which is typically issued when a volume
228 * is moved from one server to another.
230 * Called with no locks held.
232 void cm_RevokeVolumeCallback(struct rx_call *callp, cm_cell_t *cellp, AFSFid *fidp)
238 osi_Log1(afsd_logp, "RevokeVolumeCallback vol %d", fidp->Volume);
240 /* do this first, so that if we're executing a callback granting call
241 * at this moment, we kill it before it can be merged in. Otherwise,
242 * it could complete while we're doing the scan below, and get missed
243 * by both the scan and by this code.
245 tfid.cell = tfid.vnode = tfid.unique = 0;
246 tfid.volume = fidp->Volume;
247 cm_RecordRacingRevoke(&tfid, CM_RACINGFLAG_CANCELVOL);
249 lock_ObtainWrite(&cm_scacheLock);
250 for (hash = 0; hash < cm_data.scacheHashTableSize; hash++) {
251 for(scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
252 if (scp->fid.volume == fidp->Volume &&
253 (cellp == NULL || scp->fid.cell == cellp->cellID) &&
254 scp->cbExpires > 0 &&
255 scp->cbServerp != NULL) {
256 cm_HoldSCacheNoLock(scp);
257 lock_ReleaseWrite(&cm_scacheLock);
259 lock_ObtainMutex(&scp->mx);
260 osi_Log4(afsd_logp, "RevokeVolumeCallback Discarding SCache scp 0x%p vol %u vn %u uniq %u",
261 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
262 cm_DiscardSCache(scp);
263 lock_ReleaseMutex(&scp->mx);
265 cm_CallbackNotifyChange(scp);
266 lock_ObtainWrite(&cm_scacheLock);
267 cm_ReleaseSCacheNoLock(scp);
269 if (scp->flags & CM_SCACHEFLAG_PURERO && scp->volp) {
270 scp->volp->cbExpiresRO = 0;
274 } /* search one hash bucket */
275 } /* search all hash buckets */
277 lock_ReleaseWrite(&cm_scacheLock);
279 osi_Log1(afsd_logp, "RevokeVolumeCallback Complete vol %d", fidp->Volume);
283 * afs_data_pointer_to_int32() - returns least significant afs_int32 of the
284 * given data pointer, without triggering "cast truncates pointer"
285 * warnings. We use this where we explicitly don't care whether a
286 * pointer is truncated -- it loses information where a pointer is
287 * larger than an afs_int32.
291 afs_data_pointer_to_int32(const void *p)
294 afs_int32 i32[sizeof(void *) / sizeof(afs_int32)];
298 int i32_sub; /* subscript of least significant afs_int32 in ip.i32[] */
303 /* used to determine the byte order of the system */
306 char c[sizeof(int) / sizeof(char)];
312 /* little-endian system */
315 /* big-endian system */
316 i32_sub = (sizeof ip.i32 / sizeof ip.i32[0]) - 1;
321 return ip.i32[i32_sub];
323 /*------------------------------------------------------------------------
324 * EXPORTED SRXAFSCB_CallBack
327 * Routine called by the server-side callback RPC interface to
328 * implement passing in callback information.
332 * rx_call : Ptr to Rx call on which this request came in.
333 * fidsArrayp : Ptr to array of fids involved.
334 * cbsArrayp : Ptr to matching callback info for the fids.
340 * Nothing interesting.
344 *------------------------------------------------------------------------*/
345 /* handle incoming RPC callback breaking message.
346 * Called with no locks held.
349 SRXAFSCB_CallBack(struct rx_call *callp, AFSCBFids *fidsArrayp, AFSCBs *cbsArrayp)
353 struct rx_connection *connp;
354 struct rx_peer *peerp;
355 unsigned long host = 0;
356 unsigned short port = 0;
357 cm_server_t *tsp = NULL;
358 cm_cell_t* cellp = NULL;
360 MUTEX_ENTER(&callp->lock);
362 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
363 host = rx_HostOf(peerp);
364 port = rx_PortOf(peerp);
366 tsp = cm_FindServerByIP(host, CM_SERVER_FILE);
371 osi_Log2(afsd_logp, "SRXAFSCB_CallBack from host 0x%x port %d",
375 osi_Log3(afsd_logp, "SRXAFSCB_CallBack from host 0x%x port %d for cell %s",
378 cellp->name /* does not need to be saved, doesn't change */);
380 osi_Log0(afsd_logp, "SRXAFSCB_CallBack from unknown host");
384 for (i=0; i < (long) fidsArrayp->AFSCBFids_len; i++) {
385 tfidp = &fidsArrayp->AFSCBFids_val[i];
387 if (tfidp->Volume == 0)
388 continue; /* means don't do anything */
389 else if (tfidp->Vnode == 0)
390 cm_RevokeVolumeCallback(callp, cellp, tfidp);
392 cm_RevokeCallback(callp, cellp, tfidp);
395 MUTEX_EXIT(&callp->lock);
399 /*------------------------------------------------------------------------
400 * EXPORTED SRXAFSCB_InitCallBackState
403 * Routine called by the server-side callback RPC interface to
404 * implement clearing all callbacks from this host.
407 * rx_call : Ptr to Rx call on which this request came in.
413 * Nothing interesting.
417 *------------------------------------------------------------------------*/
418 /* called with no locks by RPC system when a server indicates that it has never
419 * heard from us, or for other reasons has had to discard callbacks from us
420 * without telling us, e.g. a network partition.
423 SRXAFSCB_InitCallBackState(struct rx_call *callp)
425 struct sockaddr_in taddr;
430 struct rx_connection *connp;
431 struct rx_peer *peerp;
432 unsigned long host = 0;
433 unsigned short port = 0;
435 MUTEX_ENTER(&callp->lock);
437 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
438 host = rx_HostOf(peerp);
439 port = rx_PortOf(peerp);
442 osi_Log2(afsd_logp, "SRXAFSCB_InitCallBackState from host 0x%x port %d",
446 if ((rx_ConnectionOf(callp)) && (rx_PeerOf(rx_ConnectionOf(callp)))) {
447 taddr.sin_family = AF_INET;
448 taddr.sin_addr.s_addr = rx_HostOf(rx_PeerOf(rx_ConnectionOf(callp)));
450 tsp = cm_FindServer(&taddr, CM_SERVER_FILE);
452 osi_Log1(afsd_logp, "Init Callback State server %x", tsp);
454 /* record the callback in the racing revokes structure. This
455 * shouldn't be necessary, since we shouldn't be making callback
456 * granting calls while we're going to get an initstate call,
457 * but there probably are some obscure races, so better safe
460 * We do this first since we don't hold the cm_scacheLock and vnode
461 * locks over the entire callback scan operation below. The
462 * big loop below is guaranteed to hit any callback already
463 * processed. The call to RecordRacingRevoke is guaranteed
464 * to kill any callback that is currently being returned.
465 * Anything that sneaks past both must start
466 * after the call to RecordRacingRevoke.
468 cm_RecordRacingRevoke(NULL, CM_RACINGFLAG_CANCELALL);
470 /* now search all vnodes looking for guys with this callback, if we
471 * found it, or guys with any callbacks, if we didn't find the server
472 * (that's how multihomed machines will appear and how we'll handle
473 * them, albeit a little inefficiently). That is, we're discarding all
474 * callbacks from all hosts if we get an initstate call from an unknown
475 * host. Since these calls are rare, and multihomed servers
476 * are "rare," hopefully this won't be a problem.
478 lock_ObtainWrite(&cm_scacheLock);
479 for (hash = 0; hash < cm_data.scacheHashTableSize; hash++) {
480 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
481 cm_HoldSCacheNoLock(scp);
482 lock_ReleaseWrite(&cm_scacheLock);
483 lock_ObtainMutex(&scp->mx);
485 if (scp->cbExpires > 0 && scp->cbServerp != NULL) {
486 /* we have a callback, now decide if we should clear it */
487 if (scp->cbServerp == tsp || tsp == NULL) {
488 osi_Log4(afsd_logp, "InitCallbackState Discarding SCache scp 0x%p vol %u vn %u uniq %u",
489 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
490 cm_DiscardSCache(scp);
494 lock_ReleaseMutex(&scp->mx);
496 cm_CallbackNotifyChange(scp);
497 lock_ObtainWrite(&cm_scacheLock);
498 cm_ReleaseSCacheNoLock(scp);
500 if (discarded && (scp->flags & CM_SCACHEFLAG_PURERO) && scp->volp && scp->volp->cbExpiresRO != 0)
501 scp->volp->cbExpiresRO = 0;
503 } /* search one hash bucket */
504 } /* search all hash buckets */
506 lock_ReleaseWrite(&cm_scacheLock);
509 /* reset the No flags on the server */
510 cm_SetServerNo64Bit(tsp, 0);
511 cm_SetServerNoInlineBulk(tsp, 0);
513 /* we're done with the server structure */
517 MUTEX_EXIT(&callp->lock);
521 /*------------------------------------------------------------------------
522 * EXPORTED SRXAFSCB_Probe
525 * Routine called by the server-side callback RPC interface to
526 * implement ``probing'' the Cache Manager, just making sure it's
530 * rx_call : Ptr to Rx call on which this request came in.
536 * Nothing interesting.
540 *------------------------------------------------------------------------*/
542 SRXAFSCB_Probe(struct rx_call *callp)
544 struct rx_connection *connp;
545 struct rx_peer *peerp;
546 unsigned long host = 0;
547 unsigned short port = 0;
549 MUTEX_ENTER(&callp->lock);
551 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
552 host = rx_HostOf(peerp);
553 port = rx_PortOf(peerp);
556 osi_Log2(afsd_logp, "SRXAFSCB_Probe from host 0x%x port %d",
560 MUTEX_EXIT(&callp->lock);
564 /*------------------------------------------------------------------------
565 * EXPORTED SRXAFSCB_GetLock
568 * Routine called by the server-side callback RPC interface to
569 * implement pulling out the contents of a lock in the lock
573 * a_call : Ptr to Rx call on which this request came in.
574 * a_index : Index of desired lock.
575 * a_result : Ptr to a buffer for the given lock.
578 * 0 if everything went fine,
579 * 1 if we were given a bad index.
582 * Nothing interesting.
586 *------------------------------------------------------------------------*/
587 /* debug interface */
589 extern osi_rwlock_t cm_aclLock;
590 extern osi_rwlock_t buf_globalLock;
591 extern osi_rwlock_t cm_callbackLock;
592 extern osi_rwlock_t cm_cellLock;
593 extern osi_rwlock_t cm_connLock;
594 extern osi_rwlock_t cm_daemonLock;
595 extern osi_rwlock_t cm_dnlcLock;
596 extern osi_rwlock_t cm_scacheLock;
597 extern osi_rwlock_t cm_serverLock;
598 extern osi_rwlock_t cm_userLock;
599 extern osi_rwlock_t cm_utilsLock;
600 extern osi_rwlock_t cm_volumeLock;
601 extern osi_rwlock_t smb_globalLock;
602 extern osi_rwlock_t smb_rctLock;
604 extern osi_mutex_t cm_Freelance_Lock;
605 extern osi_mutex_t cm_bufGetMutex;
606 extern osi_mutex_t cm_Afsdsbmt_Lock;
607 extern osi_mutex_t tokenEventLock;
608 extern osi_mutex_t smb_ListenerLock;
609 extern osi_mutex_t smb_RawBufLock;
610 extern osi_mutex_t smb_Dir_Watch_Lock;
612 #define LOCKTYPE_RW 1
613 #define LOCKTYPE_MUTEX 2
614 static struct _ltable {
619 {"cm_scacheLock", (char*)&cm_scacheLock, LOCKTYPE_RW},
620 {"buf_globalLock", (char*)&buf_globalLock, LOCKTYPE_RW},
621 {"cm_serverLock", (char*)&cm_serverLock, LOCKTYPE_RW},
622 {"cm_callbackLock", (char*)&cm_callbackLock, LOCKTYPE_RW},
623 {"cm_aclLock", (char*)&cm_aclLock, LOCKTYPE_RW},
624 {"cm_cellLock", (char*)&cm_cellLock, LOCKTYPE_RW},
625 {"cm_connLock", (char*)&cm_connLock, LOCKTYPE_RW},
626 {"cm_userLock", (char*)&cm_userLock, LOCKTYPE_RW},
627 {"cm_volumeLock", (char*)&cm_volumeLock, LOCKTYPE_RW},
628 {"cm_daemonLock", (char*)&cm_daemonLock, LOCKTYPE_RW},
629 {"cm_dnlcLock", (char*)&cm_dnlcLock, LOCKTYPE_RW},
630 {"cm_utilsLock", (char*)&cm_utilsLock, LOCKTYPE_RW},
631 {"smb_globalLock", (char*)&smb_globalLock, LOCKTYPE_RW},
632 {"smb_rctLock", (char*)&smb_rctLock, LOCKTYPE_RW},
633 {"cm_Freelance_Lock",(char*)&cm_Freelance_Lock, LOCKTYPE_MUTEX},
634 {"cm_bufGetMutex", (char*)&cm_bufGetMutex, LOCKTYPE_MUTEX},
635 {"cm_Afsdsbmt_Lock", (char*)&cm_Afsdsbmt_Lock, LOCKTYPE_MUTEX},
636 {"tokenEventLock", (char*)&tokenEventLock, LOCKTYPE_MUTEX},
637 {"smb_ListenerLock", (char*)&smb_ListenerLock, LOCKTYPE_MUTEX},
638 {"smb_RawBufLock", (char*)&smb_RawBufLock, LOCKTYPE_MUTEX},
639 {"smb_Dir_Watch_Lock",(char*)&smb_Dir_Watch_Lock, LOCKTYPE_MUTEX}
643 SRXAFSCB_GetLock(struct rx_call *callp, long index, AFSDBLock *lockp)
645 struct _ltable *tl; /*Ptr to lock table entry */
648 int nentries; /*Num entries in table */
649 int code; /*Return code */
650 struct rx_connection *connp;
651 struct rx_peer *peerp;
652 unsigned long host = 0;
653 unsigned short port = 0;
655 MUTEX_ENTER(&callp->lock);
657 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
658 host = rx_HostOf(peerp);
659 port = rx_PortOf(peerp);
662 osi_Log3(afsd_logp, "SRXAFSCB_GetLock(%d) from host 0x%x port %d",
663 index, ntohl(host), ntohs(port));
665 nentries = sizeof(ltable) / sizeof(struct _ltable);
666 if (index < 0 || index >= nentries) {
673 * Found it - copy out its contents.
676 strncpy(lockp->name, tl->name, sizeof(lockp->name));
677 lockp->name[sizeof(lockp->name)-1] = '\0';
678 lockp->lock.waitStates = 0;
679 switch ( tl->type ) {
681 rwp = (osi_rwlock_t *)tl->addr;
682 lockp->lock.exclLocked = rwp->flags;
683 lockp->lock.readersReading = rwp->readers;
684 lockp->lock.numWaiting = rwp->waiters;
687 mtxp = (osi_mutex_t *)tl->addr;
688 lockp->lock.exclLocked = mtxp->flags;
689 lockp->lock.readersReading = 0;
690 lockp->lock.numWaiting = mtxp->waiters;
693 lockp->lock.pid_last_reader = 0;
694 lockp->lock.pid_writer = 0;
695 lockp->lock.src_indicator = 0;
699 MUTEX_EXIT(&callp->lock);
703 /* debug interface */
705 SRXAFSCB_GetCE(struct rx_call *callp, long index, AFSDBCacheEntry *cep)
710 struct rx_connection *connp;
711 struct rx_peer *peerp;
712 unsigned long host = 0;
713 unsigned short port = 0;
715 MUTEX_ENTER(&callp->lock);
717 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
718 host = rx_HostOf(peerp);
719 port = rx_PortOf(peerp);
722 osi_Log2(afsd_logp, "SRXAFSCB_GetCE from host 0x%x port %d",
723 ntohl(host), ntohs(port));
725 lock_ObtainRead(&cm_scacheLock);
726 for (i = 0; i < cm_data.scacheHashTableSize; i++) {
727 for (scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp) {
731 } /*Zip through current hash chain */
732 } /*Zip through hash chains */
742 * Copy out the located entry.
744 memset(cep, 0, sizeof(AFSDBCacheEntry));
745 cep->addr = afs_data_pointer_to_int32(scp);
746 cep->cell = scp->fid.cell;
747 cep->netFid.Volume = scp->fid.volume;
748 cep->netFid.Vnode = scp->fid.vnode;
749 cep->netFid.Unique = scp->fid.unique;
750 cep->lock.waitStates = 0;
751 cep->lock.exclLocked = scp->mx.flags;
752 cep->lock.readersReading = 0;
753 cep->lock.numWaiting = scp->mx.waiters;
754 cep->lock.pid_last_reader = 0;
755 cep->lock.pid_writer = 0;
756 cep->lock.src_indicator = 0;
757 cep->Length = scp->length.LowPart;
758 cep->DataVersion = (afs_uint32)(scp->dataVersion & 0xFFFFFFFF);
759 cep->callback = afs_data_pointer_to_int32(scp->cbServerp);
760 if (scp->flags & CM_SCACHEFLAG_PURERO && scp->volp)
761 cep->cbExpires = scp->volp->cbExpiresRO;
763 cep->cbExpires = scp->cbExpires;
764 cep->refCount = scp->refCount;
765 cep->opens = scp->openReads;
766 cep->writers = scp->openWrites;
767 switch (scp->fileType) {
768 case CM_SCACHETYPE_FILE:
771 case CM_SCACHETYPE_MOUNTPOINT:
774 case CM_SCACHETYPE_DIRECTORY:
775 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
780 case CM_SCACHETYPE_SYMLINK:
783 case CM_SCACHETYPE_DFSLINK:
786 case CM_SCACHETYPE_INVALID:
791 if (scp->flags & CM_SCACHEFLAG_STATD)
793 if (scp->flags & CM_SCACHEFLAG_RO || scp->flags & CM_SCACHEFLAG_PURERO)
795 if (scp->fileType == CM_SCACHETYPE_MOUNTPOINT &&
796 scp->mountPointStringp[0])
798 if (scp->flags & CM_SCACHEFLAG_WAITING)
803 * Return our results.
806 lock_ReleaseRead(&cm_scacheLock);
808 MUTEX_EXIT(&callp->lock);
812 /* debug interface */
814 SRXAFSCB_GetCE64(struct rx_call *callp, long index, AFSDBCacheEntry64 *cep)
819 struct rx_connection *connp;
820 struct rx_peer *peerp;
821 unsigned long host = 0;
822 unsigned short port = 0;
824 MUTEX_ENTER(&callp->lock);
826 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
827 host = rx_HostOf(peerp);
828 port = rx_PortOf(peerp);
831 osi_Log2(afsd_logp, "SRXAFSCB_GetCE64 from host 0x%x port %d",
832 ntohl(host), ntohs(port));
834 lock_ObtainRead(&cm_scacheLock);
835 for (i = 0; i < cm_data.scacheHashTableSize; i++) {
836 for (scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp) {
840 } /*Zip through current hash chain */
841 } /*Zip through hash chains */
851 * Copy out the located entry.
853 memset(cep, 0, sizeof(AFSDBCacheEntry64));
854 cep->addr = afs_data_pointer_to_int32(scp);
855 cep->cell = scp->fid.cell;
856 cep->netFid.Volume = scp->fid.volume;
857 cep->netFid.Vnode = scp->fid.vnode;
858 cep->netFid.Unique = scp->fid.unique;
859 cep->lock.waitStates = 0;
860 cep->lock.exclLocked = scp->mx.flags;
861 cep->lock.readersReading = 0;
862 cep->lock.numWaiting = scp->mx.waiters;
863 cep->lock.pid_last_reader = 0;
864 cep->lock.pid_writer = 0;
865 cep->lock.src_indicator = 0;
866 #if !defined(AFS_64BIT_ENV)
867 cep->Length.high = scp->length.HighPart;
868 cep->Length.low = scp->length.LowPart;
870 cep->Length = (afs_int64) scp->length.QuadPart;
872 cep->DataVersion = (afs_uint32)(scp->dataVersion & 0xFFFFFFFF);
873 cep->callback = afs_data_pointer_to_int32(scp->cbServerp);
874 if (scp->flags & CM_SCACHEFLAG_PURERO && scp->volp)
875 cep->cbExpires = scp->volp->cbExpiresRO;
877 cep->cbExpires = scp->cbExpires;
878 cep->refCount = scp->refCount;
879 cep->opens = scp->openReads;
880 cep->writers = scp->openWrites;
881 switch (scp->fileType) {
882 case CM_SCACHETYPE_FILE:
885 case CM_SCACHETYPE_MOUNTPOINT:
888 case CM_SCACHETYPE_DIRECTORY:
889 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
894 case CM_SCACHETYPE_SYMLINK:
897 case CM_SCACHETYPE_DFSLINK:
900 case CM_SCACHETYPE_INVALID:
905 if (scp->flags & CM_SCACHEFLAG_STATD)
907 if (scp->flags & CM_SCACHEFLAG_RO || scp->flags & CM_SCACHEFLAG_PURERO)
909 if (scp->fileType == CM_SCACHETYPE_MOUNTPOINT &&
910 scp->mountPointStringp[0])
912 if (scp->flags & CM_SCACHEFLAG_WAITING)
917 * Return our results.
920 lock_ReleaseRead(&cm_scacheLock);
922 MUTEX_EXIT(&callp->lock);
926 /* debug interface: not implemented */
928 SRXAFSCB_XStatsVersion(struct rx_call *callp, long *vp)
930 struct rx_connection *connp;
931 struct rx_peer *peerp;
932 unsigned long host = 0;
933 unsigned short port = 0;
935 MUTEX_ENTER(&callp->lock);
937 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
938 host = rx_HostOf(peerp);
939 port = rx_PortOf(peerp);
942 osi_Log2(afsd_logp, "SRXAFSCB_XStatsVersion from host 0x%x port %d - not implemented",
943 ntohl(host), ntohs(port));
946 MUTEX_EXIT(&callp->lock);
950 /* debug interface: not implemented */
952 SRXAFSCB_GetXStats(struct rx_call *callp, long cvn, long coln, long *srvp, long *timep,
953 AFSCB_CollData *datap)
955 struct rx_connection *connp;
956 struct rx_peer *peerp;
957 unsigned long host = 0;
958 unsigned short port = 0;
960 MUTEX_ENTER(&callp->lock);
962 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
963 host = rx_HostOf(peerp);
964 port = rx_PortOf(peerp);
967 osi_Log2(afsd_logp, "SRXAFSCB_GetXStats from host 0x%x port %d - not implemented",
968 ntohl(host), ntohs(port));
970 MUTEX_EXIT(&callp->lock);
975 SRXAFSCB_InitCallBackState2(struct rx_call *callp, struct interfaceAddr* addr)
977 osi_Log0(afsd_logp, "SRXAFSCB_InitCallBackState2 ->");
979 return SRXAFSCB_InitCallBackState(callp);
982 /* debug interface */
984 SRXAFSCB_WhoAreYou(struct rx_call *callp, struct interfaceAddr* addr)
987 int cm_noIPAddr; /* number of client network interfaces */
988 int cm_IPAddr[CM_MAXINTERFACE_ADDR]; /* client's IP address in host order */
989 int cm_SubnetMask[CM_MAXINTERFACE_ADDR];/* client's subnet mask in host order*/
990 int cm_NetMtu[CM_MAXINTERFACE_ADDR]; /* client's MTU sizes */
991 int cm_NetFlags[CM_MAXINTERFACE_ADDR]; /* network flags */
993 struct rx_connection *connp;
994 struct rx_peer *peerp;
995 unsigned long host = 0;
996 unsigned short port = 0;
998 MUTEX_ENTER(&callp->lock);
1000 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1001 host = rx_HostOf(peerp);
1002 port = rx_PortOf(peerp);
1005 /* get network related info */
1006 cm_noIPAddr = CM_MAXINTERFACE_ADDR;
1007 code = syscfg_GetIFInfo(&cm_noIPAddr,
1008 cm_IPAddr, cm_SubnetMask,
1009 cm_NetMtu, cm_NetFlags);
1011 /* return all network interface addresses */
1012 osi_Log2(afsd_logp, "SRXAFSCB_WhoAreYou from host 0x%x port %d",
1016 addr->numberOfInterfaces = cm_noIPAddr;
1017 addr->uuid = cm_data.Uuid;
1018 for ( i=0; i < cm_noIPAddr; i++ ) {
1019 addr->addr_in[i] = cm_IPAddr[i];
1020 addr->subnetmask[i] = cm_SubnetMask[i];
1021 addr->mtu[i] = (rx_mtu == -1 || (rx_mtu != -1 && cm_NetMtu[i] < rx_mtu)) ?
1022 cm_NetMtu[i] : rx_mtu;
1025 MUTEX_EXIT(&callp->lock);
1030 SRXAFSCB_InitCallBackState3(struct rx_call *callp, afsUUID* serverUuid)
1034 if (UuidToString((UUID *)serverUuid, &p) == RPC_S_OK) {
1035 osi_Log1(afsd_logp, "SRXAFSCB_InitCallBackState3 %s ->",p);
1038 osi_Log0(afsd_logp, "SRXAFSCB_InitCallBackState3 - no server Uuid ->");
1040 return SRXAFSCB_InitCallBackState(callp);
1043 /* debug interface */
1045 SRXAFSCB_ProbeUuid(struct rx_call *callp, afsUUID* clientUuid)
1047 struct rx_connection *connp;
1048 struct rx_peer *peerp;
1049 unsigned long host = 0;
1050 unsigned short port = 0;
1054 MUTEX_ENTER(&callp->lock);
1056 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1057 host = rx_HostOf(peerp);
1058 port = rx_PortOf(peerp);
1061 if ( !afs_uuid_equal(&cm_data.Uuid, clientUuid) ) {
1062 UuidToString((UUID *)&cm_data.Uuid, &p);
1063 UuidToString((UUID *)clientUuid, &q);
1064 osi_Log4(afsd_logp, "SRXAFSCB_ProbeUuid %s != %s from host 0x%x port %d",
1065 osi_LogSaveString(afsd_logp,p),
1066 osi_LogSaveString(afsd_logp,q),
1072 code = 1; /* failure */
1074 osi_Log2(afsd_logp, "SRXAFSCB_ProbeUuid (success) from host 0x%x port %d",
1078 MUTEX_EXIT(&callp->lock);
1082 /* debug interface */
1084 SRXAFSCB_GetCellByNum(struct rx_call *callp, afs_int32 a_cellnum,
1085 char **a_name, serverList *a_hosts)
1089 cm_serverRef_t * serverRefp;
1090 struct rx_connection *connp;
1091 struct rx_peer *peerp;
1092 unsigned long host = 0;
1093 unsigned short port = 0;
1095 MUTEX_ENTER(&callp->lock);
1097 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1098 host = rx_HostOf(peerp);
1099 port = rx_PortOf(peerp);
1102 osi_Log3(afsd_logp, "SRXAFSCB_GetCellByNum(%d) from host 0x%x port %d",
1103 a_cellnum, ntohl(host), ntohs(port));
1105 a_hosts->serverList_val = 0;
1106 a_hosts->serverList_len = 0;
1108 cellp = cm_FindCellByID(a_cellnum);
1110 *a_name = strdup("");
1111 MUTEX_EXIT(&callp->lock);
1115 lock_ObtainRead(&cm_serverLock);
1116 *a_name = strdup(cellp->name);
1118 for ( sn = 0, serverRefp = cellp->vlServersp;
1119 sn < AFSMAXCELLHOSTS && serverRefp;
1120 sn++, serverRefp = serverRefp->next);
1122 a_hosts->serverList_len = sn;
1123 a_hosts->serverList_val = (afs_int32 *)osi_Alloc(sn * sizeof(afs_int32));
1125 for ( sn = 0, serverRefp = cellp->vlServersp;
1126 sn < AFSMAXCELLHOSTS && serverRefp;
1127 sn++, serverRefp = serverRefp->next)
1129 a_hosts->serverList_val[sn] = ntohl(serverRefp->server->addr.sin_addr.s_addr);
1132 lock_ReleaseRead(&cm_serverLock);
1133 MUTEX_EXIT(&callp->lock);
1137 /* debug interface */
1139 SRXAFSCB_TellMeAboutYourself( struct rx_call *callp,
1140 struct interfaceAddr *addr,
1141 Capabilities * capabilities)
1144 afs_int32 *dataBuffP;
1145 afs_int32 dataBytes;
1146 int cm_noIPAddr; /* number of client network interfaces */
1147 int cm_IPAddr[CM_MAXINTERFACE_ADDR]; /* client's IP address in host order */
1148 int cm_SubnetMask[CM_MAXINTERFACE_ADDR];/* client's subnet mask in host order*/
1149 int cm_NetMtu[CM_MAXINTERFACE_ADDR]; /* client's MTU sizes */
1150 int cm_NetFlags[CM_MAXINTERFACE_ADDR]; /* network flags */
1152 struct rx_connection *connp;
1153 struct rx_peer *peerp;
1154 unsigned long host = 0;
1155 unsigned short port = 0;
1157 MUTEX_ENTER(&callp->lock);
1159 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1160 host = rx_HostOf(peerp);
1161 port = rx_PortOf(peerp);
1164 /* get network related info */
1165 cm_noIPAddr = CM_MAXINTERFACE_ADDR;
1166 code = syscfg_GetIFInfo(&cm_noIPAddr,
1167 cm_IPAddr, cm_SubnetMask,
1168 cm_NetMtu, cm_NetFlags);
1170 osi_Log2(afsd_logp, "SRXAFSCB_TellMeAboutYourself from host 0x%x port %d",
1174 /* return all network interface addresses */
1175 addr->numberOfInterfaces = cm_noIPAddr;
1176 addr->uuid = cm_data.Uuid;
1177 for ( i=0; i < cm_noIPAddr; i++ ) {
1178 addr->addr_in[i] = cm_IPAddr[i];
1179 addr->subnetmask[i] = cm_SubnetMask[i];
1180 addr->mtu[i] = (rx_mtu == -1 || (rx_mtu != -1 && cm_NetMtu[i] < rx_mtu)) ?
1181 cm_NetMtu[i] : rx_mtu;
1184 dataBytes = 1 * sizeof(afs_int32);
1185 dataBuffP = (afs_int32 *) osi_Alloc(dataBytes);
1186 dataBuffP[0] = CLIENT_CAPABILITY_ERRORTRANS;
1187 capabilities->Capabilities_len = dataBytes / sizeof(afs_int32);
1188 capabilities->Capabilities_val = dataBuffP;
1190 MUTEX_EXIT(&callp->lock);
1194 /*------------------------------------------------------------------------
1195 * EXPORTED SRXAFSCB_GetServerPrefs
1198 * Routine to list server preferences used by this client.
1201 * a_call : Ptr to Rx call on which this request came in.
1202 * a_index : Input server index
1203 * a_srvr_addr : Output server address (0xffffffff on last server)
1204 * a_srvr_rank : Output server rank
1210 * Nothing interesting.
1214 *------------------------------------------------------------------------*/
1216 int SRXAFSCB_GetServerPrefs(
1217 struct rx_call *callp,
1219 afs_int32 *a_srvr_addr,
1220 afs_int32 *a_srvr_rank)
1222 struct rx_connection *connp;
1223 struct rx_peer *peerp;
1224 unsigned long host = 0;
1225 unsigned short port = 0;
1227 MUTEX_ENTER(&callp->lock);
1229 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1230 host = rx_HostOf(peerp);
1231 port = rx_PortOf(peerp);
1234 osi_Log2(afsd_logp, "SRXAFSCB_GetServerPrefs from host 0x%x port %d - not implemented",
1238 *a_srvr_addr = 0xffffffff;
1239 *a_srvr_rank = 0xffffffff;
1241 MUTEX_EXIT(&callp->lock);
1245 /*------------------------------------------------------------------------
1246 * EXPORTED SRXAFSCB_GetCellServDB
1249 * Routine to list cells configured for this client
1252 * a_call : Ptr to Rx call on which this request came in.
1253 * a_index : Input cell index
1254 * a_name : Output cell name ("" on last cell)
1255 * a_hosts : Output cell database servers
1261 * Nothing interesting.
1265 *------------------------------------------------------------------------*/
1267 int SRXAFSCB_GetCellServDB(struct rx_call *callp, afs_int32 index, char **a_name,
1268 serverList *a_hosts)
1271 struct rx_connection *connp;
1272 struct rx_peer *peerp;
1273 unsigned long host = 0;
1274 unsigned short port = 0;
1276 MUTEX_ENTER(&callp->lock);
1278 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1279 host = rx_HostOf(peerp);
1280 port = rx_PortOf(peerp);
1283 osi_Log2(afsd_logp, "SRXAFSCB_GetCellServDB from host 0x%x port %d - not implemented",
1284 ntohl(host), ntohs(port));
1286 t_name = (char *)malloc(AFSNAMEMAX);
1289 a_hosts->serverList_len = 0;
1291 MUTEX_EXIT(&callp->lock);
1295 /*------------------------------------------------------------------------
1296 * EXPORTED SRXAFSCB_GetLocalCell
1299 * Routine to return name of client's local cell
1302 * a_call : Ptr to Rx call on which this request came in.
1303 * a_name : Output cell name
1309 * Nothing interesting.
1313 *------------------------------------------------------------------------*/
1315 int SRXAFSCB_GetLocalCell(struct rx_call *callp, char **a_name)
1318 struct rx_connection *connp;
1319 struct rx_peer *peerp;
1320 unsigned long host = 0;
1321 unsigned short port = 0;
1323 MUTEX_ENTER(&callp->lock);
1325 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1326 host = rx_HostOf(peerp);
1327 port = rx_PortOf(peerp);
1330 osi_Log2(afsd_logp, "SRXAFSCB_GetLocalCell from host 0x%x port %d",
1331 ntohl(host), ntohs(port));
1333 if (cm_data.rootCellp) {
1334 t_name = (char *)malloc(strlen(cm_data.rootCellp->name)+1);
1335 strcpy(t_name, cm_data.rootCellp->name);
1337 t_name = (char *)malloc(1);
1342 MUTEX_EXIT(&callp->lock);
1348 * afs_MarshallCacheConfig - marshall client cache configuration
1352 * IN callerVersion - the rpc stat version of the caller.
1354 * IN config - client cache configuration.
1356 * OUT ptr - buffer where configuration is marshalled.
1362 static void afs_MarshallCacheConfig(
1363 afs_uint32 callerVersion,
1364 cm_initparams_v1 *config,
1368 * We currently only support version 1.
1370 *(ptr++) = config->nChunkFiles;
1371 *(ptr++) = config->nStatCaches;
1372 *(ptr++) = config->nDataCaches;
1373 *(ptr++) = config->nVolumeCaches;
1374 *(ptr++) = config->firstChunkSize;
1375 *(ptr++) = config->otherChunkSize;
1376 *(ptr++) = config->cacheSize;
1377 *(ptr++) = config->setTime;
1378 *(ptr++) = config->memCache;
1383 /*------------------------------------------------------------------------
1384 * EXPORTED SRXAFSCB_GetCacheConfig
1387 * Routine to return parameters used to initialize client cache.
1388 * Client may request any format version. Server may not return
1389 * format version greater than version requested by client.
1392 * a_call: Ptr to Rx call on which this request came in.
1393 * callerVersion: Data format version desired by the client.
1394 * serverVersion: Data format version of output data.
1395 * configCount: Number bytes allocated for output data.
1396 * config: Client cache configuration.
1402 * Nothing interesting.
1406 *------------------------------------------------------------------------*/
1408 int SRXAFSCB_GetCacheConfig(struct rx_call *callp,
1409 afs_uint32 callerVersion,
1410 afs_uint32 *serverVersion,
1411 afs_uint32 *configCount,
1412 cacheConfig *config)
1414 afs_uint32 *t_config;
1416 extern cm_initparams_v1 cm_initParams;
1417 struct rx_connection *connp;
1418 struct rx_peer *peerp;
1419 unsigned long host = 0;
1420 unsigned short port = 0;
1422 MUTEX_ENTER(&callp->lock);
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_GetCacheConfig from host 0x%x port %d - version 1 only",
1430 ntohl(host), ntohs(port));
1433 * Currently only support version 1
1435 allocsize = sizeof(cm_initparams_v1);
1436 t_config = (afs_uint32 *)malloc(allocsize);
1438 afs_MarshallCacheConfig(callerVersion, &cm_initParams, t_config);
1440 *serverVersion = AFS_CLIENT_RETRIEVAL_FIRST_EDITION;
1443 #define SIZE_MAX UINT_MAX
1445 osi_assertx(allocsize < SIZE_MAX, "allocsize >= SIZE_MAX");
1447 *configCount = (afs_uint32)allocsize;
1448 config->cacheConfig_val = t_config;
1449 config->cacheConfig_len = (*configCount)/sizeof(afs_uint32);
1451 MUTEX_EXIT(&callp->lock);
1455 /* called by afsd without any locks to initialize this module */
1456 void cm_InitCallback(void)
1458 lock_InitializeRWLock(&cm_callbackLock, "cm_callbackLock");
1459 cm_activeCallbackGrantingCalls = 0;
1462 /* called with locked scp; tells us whether we've got a callback.
1463 * Expirations are checked by a background daemon so as to make
1464 * this function as inexpensive as possible
1466 int cm_HaveCallback(cm_scache_t *scp)
1468 #ifdef AFS_FREELANCE_CLIENT
1469 // yj: we handle callbacks specially for callbacks on the root directory
1470 // Since it's local, we almost always say that we have callback on it
1471 // The only time we send back a 0 is if we're need to initialize or
1472 // reinitialize the fake directory
1474 // There are 2 state variables cm_fakeGettingCallback and cm_fakeDirCallback
1475 // cm_fakeGettingCallback is 1 if we're in the process of initialization and
1476 // hence should return false. it's 0 otherwise
1477 // cm_fakeDirCallback is 0 if we haven't loaded the fake directory, it's 1
1478 // if the fake directory is loaded and this is the first time cm_HaveCallback
1479 // is called since then. We return false in this case to allow cm_GetCallback
1480 // to be called because cm_GetCallback has some initialization work to do.
1481 // If cm_fakeDirCallback is 2, then it means that the fake directory is in
1482 // good shape and we simply return true, provided no change is detected.
1485 if (cm_freelanceEnabled &&
1486 scp->fid.cell==AFS_FAKE_ROOT_CELL_ID && scp->fid.volume==AFS_FAKE_ROOT_VOL_ID) {
1487 /* if it's something on /afs */
1488 if (!(scp->fid.vnode==0x1 && scp->fid.unique==0x1)) {
1489 /* if it's not root.afs */
1493 lock_ObtainMutex(&cm_Freelance_Lock);
1494 fdc = cm_fakeDirCallback;
1495 fgc = cm_fakeGettingCallback;
1496 lock_ReleaseMutex(&cm_Freelance_Lock);
1498 if (fdc==1) { // first call since init
1500 } else if (fdc==2 && !fgc) { // we're in good shape
1501 if (cm_getLocalMountPointChange()) { // check for changes
1502 cm_clearLocalMountPointChange(); // clear the changefile
1503 lock_ReleaseMutex(&scp->mx); // this is re-locked in reInitLocalMountPoints
1504 cm_reInitLocalMountPoints(); // start reinit
1505 lock_ObtainMutex(&scp->mx); // now get the lock back
1508 return 1; // no change
1514 if (scp->cbServerp != NULL) {
1516 } else if (cm_OfflineROIsValid) {
1517 switch (cm_GetVolumeStatus(scp->volp, scp->fid.volume)) {
1530 /* need to detect a broken callback that races with our obtaining a callback.
1531 * Need to be able to do this even if we don't know the file ID of the file
1532 * we're breaking the callback on at the time we start the acquisition of the
1533 * callback (as in the case where we are creating a file).
1535 * So, we start by writing down the count of the # of callbacks we've received
1536 * so far, and bumping a global counter of the # of callback granting calls
1537 * outstanding (all done under cm_callbackLock).
1539 * When we're back from the call, we look at all of the callback revokes with
1540 * counter numbers greater than the one we recorded in our caller's structure,
1541 * and replay those that are higher than when we started the call.
1543 * We free all the structures in the queue when the count of the # of outstanding
1544 * callback-granting calls drops to zero.
1546 * We call this function with the scp locked, too, but in its current implementation,
1547 * this knowledge is not used.
1549 void cm_StartCallbackGrantingCall(cm_scache_t *scp, cm_callbackRequest_t *cbrp)
1551 lock_ObtainWrite(&cm_callbackLock);
1552 cbrp->callbackCount = cm_callbackCount;
1553 cm_activeCallbackGrantingCalls++;
1554 cbrp->startTime = time(NULL);
1555 cbrp->serverp = NULL;
1556 lock_ReleaseWrite(&cm_callbackLock);
1559 /* Called at the end of a callback-granting call, to remove the callback
1560 * info from the scache entry, if necessary.
1562 * Called with scp locked, so we can discard the callbacks easily with
1563 * this locking hierarchy.
1565 void cm_EndCallbackGrantingCall(cm_scache_t *scp, cm_callbackRequest_t *cbrp,
1566 AFSCallBack *cbp, long flags)
1568 cm_racingRevokes_t *revp; /* where we are */
1569 cm_racingRevokes_t *nrevp; /* where we'll be next */
1571 cm_server_t * serverp = NULL;
1572 int discardScp = 0, discardVolCB = 0;
1574 lock_ObtainWrite(&cm_callbackLock);
1575 if (flags & CM_CALLBACK_MAINTAINCOUNT) {
1576 osi_assertx(cm_activeCallbackGrantingCalls > 0,
1577 "CM_CALLBACK_MAINTAINCOUNT && cm_activeCallbackGrantingCalls == 0");
1580 osi_assertx(cm_activeCallbackGrantingCalls-- > 0,
1581 "!CM_CALLBACK_MAINTAINCOUNT && cm_activeCallbackGrantingCalls == 0");
1583 if (cm_activeCallbackGrantingCalls == 0)
1588 /* record the callback; we'll clear it below if we really lose it */
1591 if (scp->cbServerp != cbrp->serverp) {
1592 serverp = scp->cbServerp;
1594 cm_GetServer(cbrp->serverp);
1595 scp->cbServerp = cbrp->serverp;
1598 serverp = cbrp->serverp;
1600 scp->cbExpires = cbrp->startTime + cbp->ExpirationTime;
1601 if (scp->flags & CM_SCACHEFLAG_PURERO && scp->volp)
1602 scp->volp->cbExpiresRO = scp->cbExpires;
1605 serverp = cbrp->serverp;
1608 cbrp->serverp = NULL;
1611 /* a callback was actually revoked during our granting call, so
1612 * run down the list of revoked fids, looking for ours.
1613 * If activeCallbackGrantingCalls is zero, free the elements, too.
1615 * May need to go through entire list just to do the freeing.
1617 for (revp = cm_racingRevokesp; revp; revp = nrevp) {
1618 nrevp = (cm_racingRevokes_t *) osi_QNext(&revp->q);
1619 /* if this callback came in later than when we started the
1620 * callback-granting call, and if this fid is the right fid,
1621 * then clear the callback.
1623 if (scp && cbrp && cbrp->callbackCount != cm_callbackCount
1624 && revp->callbackCount > cbrp->callbackCount
1625 && (( scp->fid.volume == revp->fid.volume &&
1626 scp->fid.vnode == revp->fid.vnode &&
1627 scp->fid.unique == revp->fid.unique)
1629 ((revp->flags & CM_RACINGFLAG_CANCELVOL) &&
1630 scp->fid.volume == revp->fid.volume)
1632 (revp->flags & CM_RACINGFLAG_CANCELALL))) {
1633 /* this one matches */
1635 "Racing revoke scp 0x%p old cbc %d rev cbc %d cur cbc %d",
1637 cbrp->callbackCount, revp->callbackCount,
1641 if ((scp->flags & CM_SCACHEFLAG_PURERO) && scp->volp &&
1642 (revp->flags & (CM_RACINGFLAG_CANCELVOL | CM_RACINGFLAG_CANCELALL)))
1643 scp->volp->cbExpiresRO = 0;
1649 /* if we freed the list, zap the pointer to it */
1651 cm_racingRevokesp = NULL;
1653 lock_ReleaseWrite(&cm_callbackLock);
1656 cm_DiscardSCache(scp);
1657 lock_ReleaseMutex(&scp->mx);
1658 cm_CallbackNotifyChange(scp);
1659 lock_ObtainMutex(&scp->mx);
1663 lock_ObtainWrite(&cm_serverLock);
1664 cm_FreeServer(serverp);
1665 lock_ReleaseWrite(&cm_serverLock);
1669 /* if flags is 1, we want to force the code to make one call, anyway.
1670 * called with locked scp; returns with same.
1672 long cm_GetCallback(cm_scache_t *scp, struct cm_user *userp,
1673 struct cm_req *reqp, long flags)
1676 cm_conn_t *connp = NULL;
1677 AFSFetchStatus afsStatus;
1679 AFSCallBack callback;
1681 cm_callbackRequest_t cbr;
1684 struct rx_connection * callp = NULL;
1685 int syncop_done = 0;
1687 osi_Log4(afsd_logp, "GetCallback scp 0x%p cell %d vol %d flags %lX",
1688 scp, scp->fid.cell, scp->fid.volume, flags);
1690 #ifdef AFS_FREELANCE_CLIENT
1691 // The case where a callback is needed on /afs is handled
1692 // specially. We need to fetch the status by calling
1693 // cm_MergeStatus and mark that cm_fakeDirCallback is 2
1694 if (cm_freelanceEnabled) {
1695 if (scp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
1696 scp->fid.volume==AFS_FAKE_ROOT_VOL_ID &&
1697 scp->fid.unique==0x1 &&
1698 scp->fid.vnode==0x1) {
1700 // Start by indicating that we're in the process
1701 // of fetching the callback
1702 lock_ObtainMutex(&cm_Freelance_Lock);
1703 osi_Log0(afsd_logp,"cm_getGetCallback fakeGettingCallback=1");
1704 cm_fakeGettingCallback = 1;
1705 lock_ReleaseMutex(&cm_Freelance_Lock);
1707 // Fetch the status info
1708 cm_MergeStatus(NULL, scp, &afsStatus, &volSync, userp, 0);
1710 // Indicate that the callback is not done
1711 lock_ObtainMutex(&cm_Freelance_Lock);
1712 osi_Log0(afsd_logp,"cm_getGetCallback fakeDirCallback=2");
1713 cm_fakeDirCallback = 2;
1715 // Indicate that we're no longer fetching the callback
1716 osi_Log0(afsd_logp,"cm_getGetCallback fakeGettingCallback=0");
1717 cm_fakeGettingCallback = 0;
1718 lock_ReleaseMutex(&cm_Freelance_Lock);
1723 if (scp->fid.cell==AFS_FAKE_ROOT_CELL_ID && scp->fid.volume==AFS_FAKE_ROOT_VOL_ID) {
1724 osi_Log0(afsd_logp,"cm_getcallback should NEVER EVER get here... ");
1727 #endif /* AFS_FREELANCE_CLIENT */
1729 mustCall = (flags & 1);
1730 cm_AFSFidFromFid(&tfid, &scp->fid);
1732 if (!mustCall && cm_HaveCallback(scp))
1735 /* turn off mustCall, since it has now forced us past the check above */
1738 /* otherwise, we have to make an RPC to get the status */
1740 code = cm_SyncOp(scp, NULL, userp, reqp, 0,
1741 CM_SCACHESYNC_FETCHSTATUS | CM_SCACHESYNC_GETCALLBACK);
1746 cm_StartCallbackGrantingCall(scp, &cbr);
1748 lock_ReleaseMutex(&scp->mx);
1750 /* now make the RPC */
1751 osi_Log4(afsd_logp, "CALL FetchStatus scp 0x%p vol %u vn %u uniq %u",
1752 scp, sfid.volume, sfid.vnode, sfid.unique);
1754 code = cm_ConnFromFID(&sfid, userp, reqp, &connp);
1758 callp = cm_GetRxConn(connp);
1759 code = RXAFS_FetchStatus(callp, &tfid,
1760 &afsStatus, &callback, &volSync);
1761 rx_PutConnection(callp);
1763 } while (cm_Analyze(connp, userp, reqp, &sfid, &volSync, NULL,
1765 code = cm_MapRPCError(code, reqp);
1767 osi_Log4(afsd_logp, "CALL FetchStatus FAILURE code 0x%x scp 0x%p vol %u vn %u",
1768 code, scp, scp->fid.volume, scp->fid.vnode);
1770 osi_Log4(afsd_logp, "CALL FetchStatus SUCCESS scp 0x%p vol %u vn %u uniq %u",
1771 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1773 lock_ObtainMutex(&scp->mx);
1775 cm_EndCallbackGrantingCall(scp, &cbr, &callback, 0);
1776 cm_MergeStatus(NULL, scp, &afsStatus, &volSync, userp, 0);
1778 cm_EndCallbackGrantingCall(NULL, &cbr, NULL, 0);
1781 /* if we got an error, return to caller */
1787 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_FETCHSTATUS | CM_SCACHESYNC_GETCALLBACK);
1790 osi_Log2(afsd_logp, "GetCallback Failed code 0x%x scp 0x%p -->",code, scp);
1791 osi_Log4(afsd_logp, " cell %u vol %u vn %u uniq %u",
1792 scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1794 osi_Log3(afsd_logp, "GetCallback Complete scp 0x%p cell %d vol %d",
1795 scp, scp->fid.cell, scp->fid.volume);
1802 /* called with cm_scacheLock held */
1803 long cm_CBServersUp(cm_scache_t *scp, time_t * downTime)
1805 cm_vol_state_t *statep;
1806 cm_volume_t * volp = scp->volp;
1807 afs_uint32 volID = scp->fid.volume;
1808 cm_serverRef_t *tsrp;
1813 if (scp->cbServerp == NULL)
1816 if (volp->rw.ID == volID) {
1818 } else if (volp->ro.ID == volID) {
1820 } else if (volp->bk.ID == volID) {
1824 if (statep->state == vl_online)
1827 for (found = 0,tsrp = statep->serversp; tsrp; tsrp=tsrp->next) {
1828 if (tsrp->server == scp->cbServerp)
1830 if (tsrp->server->downTime > *downTime)
1831 *downTime = tsrp->server->downTime;
1834 /* if the cbServerp does not match the current volume server list
1835 * we report the callback server as up so the callback can be
1838 return(found ? 0 : 1);
1841 /* called periodically by cm_daemon to shut down use of expired callbacks */
1842 void cm_CheckCBExpiration(void)
1846 time_t now, downTime;
1848 osi_Log0(afsd_logp, "CheckCBExpiration");
1851 lock_ObtainWrite(&cm_scacheLock);
1852 for (i=0; i<cm_data.scacheHashTableSize; i++) {
1853 for (scp = cm_data.scacheHashTablep[i]; scp; scp=scp->nextp) {
1855 if (scp->flags & CM_SCACHEFLAG_PURERO && scp->volp) {
1856 if (scp->volp->cbExpiresRO > scp->cbExpires && scp->cbExpires > 0)
1857 scp->cbExpires = scp->volp->cbExpiresRO;
1860 if (scp->cbServerp && scp->cbExpires > 0 && now > scp->cbExpires &&
1861 (cm_CBServersUp(scp, &downTime) || downTime == 0 || downTime >= scp->cbExpires))
1863 cm_HoldSCacheNoLock(scp);
1864 lock_ReleaseWrite(&cm_scacheLock);
1866 osi_Log4(afsd_logp, "Callback Expiration Discarding SCache scp 0x%p vol %u vn %u uniq %u",
1867 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1868 lock_ObtainMutex(&scp->mx);
1869 cm_DiscardSCache(scp);
1870 lock_ReleaseMutex(&scp->mx);
1871 cm_CallbackNotifyChange(scp);
1873 cm_ReleaseSCacheNoLock(scp);
1874 lock_ObtainWrite(&cm_scacheLock);
1878 lock_ReleaseWrite(&cm_scacheLock);
1880 osi_Log0(afsd_logp, "CheckCBExpiration Complete");
1885 cm_GiveUpAllCallbacks(cm_server_t *tsp, afs_int32 markDown)
1889 struct rx_connection * rxconnp;
1891 if ((tsp->type == CM_SERVER_FILE) && !(tsp->flags & CM_SERVERFLAG_DOWN))
1893 code = cm_ConnByServer(tsp, cm_rootUserp, &connp);
1895 rxconnp = cm_GetRxConn(connp);
1896 rx_SetConnDeadTime(rxconnp, 10);
1897 code = RXAFS_GiveUpAllCallBacks(rxconnp);
1898 rx_SetConnDeadTime(rxconnp, ConnDeadtimeout);
1899 rx_PutConnection(rxconnp);
1903 cm_server_vols_t * tsrvp;
1907 lock_ObtainMutex(&tsp->mx);
1908 if (!(tsp->flags & CM_SERVERFLAG_DOWN)) {
1909 tsp->flags |= CM_SERVERFLAG_DOWN;
1910 tsp->downTime = osi_Time();
1912 cm_ForceNewConnections(tsp);
1913 /* Now update the volume status */
1914 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
1915 for (i=0; i<NUM_SERVER_VOLS; i++) {
1916 if (tsrvp->ids[i] != 0) {
1921 code = cm_GetVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
1922 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE, &volp);
1924 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
1930 lock_ReleaseMutex(&tsp->mx);
1936 cm_GiveUpAllCallbacksAllServers(afs_int32 markDown)
1940 if (!cm_giveUpAllCBs)
1943 lock_ObtainWrite(&cm_serverLock);
1944 for (tsp = cm_allServersp; tsp; tsp = tsp->allNextp) {
1945 cm_GetServerNoLock(tsp);
1946 lock_ReleaseWrite(&cm_serverLock);
1947 cm_GiveUpAllCallbacks(tsp, markDown);
1948 lock_ObtainWrite(&cm_serverLock);
1949 cm_PutServerNoLock(tsp);
1951 lock_ReleaseWrite(&cm_serverLock);