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 cm_SetFid(&tfid, scp->fid.cell, scp->fid.volume, scp->parentVnode, scp->parentUnique);
143 dscp = cm_FindSCache(&tfid);
146 dscp->flags & CM_SCACHEFLAG_ANYWATCH )
148 FILE_NOTIFY_GENERIC_FILE_FILTER,
149 dscp, NULL, NULL, TRUE);
152 dc_break_callback(FID_HASH_FN(&dscp->fid));
155 cm_ReleaseSCache(dscp);
159 /* called with no locks held for every file ID that is revoked directly by
160 * a callback revoke call. Does not have to handle volume callback breaks,
161 * since those have already been split out.
163 * The callp parameter is currently unused.
165 void cm_RevokeCallback(struct rx_call *callp, cm_cell_t * cellp, AFSFid *fidp)
171 /* don't bother setting cell, since we won't be checking it (to aid
172 * in working with multi-homed servers: we don't know the cell if we
173 * don't recognize the IP address).
176 tfid.volume = fidp->Volume;
177 tfid.vnode = fidp->Vnode;
178 tfid.unique = fidp->Unique;
179 hash = CM_SCACHE_HASH(&tfid);
181 osi_Log3(afsd_logp, "RevokeCallback vol %u vn %u uniq %u",
182 fidp->Volume, fidp->Vnode, fidp->Unique);
184 /* do this first, so that if we're executing a callback granting call
185 * at this moment, we kill it before it can be merged in. Otherwise,
186 * it could complete while we're doing the scan below, and get missed
187 * by both the scan and by this code.
189 cm_RecordRacingRevoke(&tfid, 0);
191 lock_ObtainWrite(&cm_scacheLock);
192 /* do all in the hash bucket, since we don't know how many we'll find with
195 for (scp = cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
196 if (scp->fid.volume == tfid.volume &&
197 scp->fid.vnode == tfid.vnode &&
198 scp->fid.unique == tfid.unique &&
199 (cellp == NULL || scp->fid.cell == cellp->cellID) &&
200 scp->cbExpires > 0 &&
201 scp->cbServerp != NULL)
203 cm_HoldSCacheNoLock(scp);
204 lock_ReleaseWrite(&cm_scacheLock);
205 osi_Log4(afsd_logp, "RevokeCallback Discarding SCache scp 0x%p vol %u vn %u uniq %u",
206 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
208 lock_ObtainWrite(&scp->rw);
209 cm_DiscardSCache(scp);
210 lock_ReleaseWrite(&scp->rw);
212 cm_CallbackNotifyChange(scp);
214 lock_ObtainWrite(&cm_scacheLock);
215 cm_ReleaseSCacheNoLock(scp);
218 lock_ReleaseWrite(&cm_scacheLock);
220 osi_Log3(afsd_logp, "RevokeCallback Complete vol %u vn %u uniq %u",
221 fidp->Volume, fidp->Vnode, fidp->Unique);
224 /* called to revoke a volume callback, which is typically issued when a volume
225 * is moved from one server to another.
227 * Called with no locks held.
229 void cm_RevokeVolumeCallback(struct rx_call *callp, cm_cell_t *cellp, AFSFid *fidp)
235 osi_Log1(afsd_logp, "RevokeVolumeCallback vol %d", fidp->Volume);
237 /* do this first, so that if we're executing a callback granting call
238 * at this moment, we kill it before it can be merged in. Otherwise,
239 * it could complete while we're doing the scan below, and get missed
240 * by both the scan and by this code.
242 tfid.cell = tfid.vnode = tfid.unique = 0;
243 tfid.volume = fidp->Volume;
244 cm_RecordRacingRevoke(&tfid, CM_RACINGFLAG_CANCELVOL);
246 lock_ObtainWrite(&cm_scacheLock);
247 for (hash = 0; hash < cm_data.scacheHashTableSize; hash++) {
248 for(scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
249 if (scp->fid.volume == fidp->Volume &&
250 (cellp == NULL || scp->fid.cell == cellp->cellID) &&
251 scp->cbExpires > 0 &&
252 scp->cbServerp != NULL) {
253 cm_HoldSCacheNoLock(scp);
254 lock_ReleaseWrite(&cm_scacheLock);
256 lock_ObtainWrite(&scp->rw);
257 osi_Log4(afsd_logp, "RevokeVolumeCallback Discarding SCache scp 0x%p vol %u vn %u uniq %u",
258 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
259 cm_DiscardSCache(scp);
260 lock_ReleaseWrite(&scp->rw);
262 cm_CallbackNotifyChange(scp);
263 lock_ObtainWrite(&cm_scacheLock);
264 cm_ReleaseSCacheNoLock(scp);
265 if (scp->flags & CM_SCACHEFLAG_PURERO) {
266 cm_volume_t *volp = cm_GetVolumeByFID(&scp->fid);
268 volp->cbExpiresRO = 0;
273 } /* search one hash bucket */
274 } /* search all hash buckets */
276 lock_ReleaseWrite(&cm_scacheLock);
278 osi_Log1(afsd_logp, "RevokeVolumeCallback Complete vol %d", fidp->Volume);
282 * afs_data_pointer_to_int32() - returns least significant afs_int32 of the
283 * given data pointer, without triggering "cast truncates pointer"
284 * warnings. We use this where we explicitly don't care whether a
285 * pointer is truncated -- it loses information where a pointer is
286 * larger than an afs_int32.
290 afs_data_pointer_to_int32(const void *p)
293 afs_int32 i32[sizeof(void *) / sizeof(afs_int32)];
297 int i32_sub; /* subscript of least significant afs_int32 in ip.i32[] */
302 /* used to determine the byte order of the system */
305 char c[sizeof(int) / sizeof(char)];
311 /* little-endian system */
314 /* big-endian system */
315 i32_sub = (sizeof ip.i32 / sizeof ip.i32[0]) - 1;
320 return ip.i32[i32_sub];
322 /*------------------------------------------------------------------------
323 * EXPORTED SRXAFSCB_CallBack
326 * Routine called by the server-side callback RPC interface to
327 * implement passing in callback information.
331 * rx_call : Ptr to Rx call on which this request came in.
332 * fidsArrayp : Ptr to array of fids involved.
333 * cbsArrayp : Ptr to matching callback info for the fids.
339 * Nothing interesting.
343 *------------------------------------------------------------------------*/
344 /* handle incoming RPC callback breaking message.
345 * Called with no locks held.
348 SRXAFSCB_CallBack(struct rx_call *callp, AFSCBFids *fidsArrayp, AFSCBs *cbsArrayp)
352 struct rx_connection *connp;
353 struct rx_peer *peerp;
354 unsigned long host = 0;
355 unsigned short port = 0;
356 cm_server_t *tsp = NULL;
357 cm_cell_t* cellp = NULL;
359 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
360 host = rx_HostOf(peerp);
361 port = rx_PortOf(peerp);
363 tsp = cm_FindServerByIP(host, CM_SERVER_FILE);
368 osi_Log2(afsd_logp, "SRXAFSCB_CallBack from host 0x%x port %d",
372 osi_Log3(afsd_logp, "SRXAFSCB_CallBack from host 0x%x port %d for cell %s",
375 cellp->name /* does not need to be saved, doesn't change */);
377 osi_Log0(afsd_logp, "SRXAFSCB_CallBack from unknown host");
381 for (i=0; i < (long) fidsArrayp->AFSCBFids_len; i++) {
382 tfidp = &fidsArrayp->AFSCBFids_val[i];
384 if (tfidp->Volume == 0)
385 continue; /* means don't do anything */
386 else if (tfidp->Vnode == 0)
387 cm_RevokeVolumeCallback(callp, cellp, tfidp);
389 cm_RevokeCallback(callp, cellp, tfidp);
394 /*------------------------------------------------------------------------
395 * EXPORTED SRXAFSCB_InitCallBackState
398 * Routine called by the server-side callback RPC interface to
399 * implement clearing all callbacks from this host.
402 * rx_call : Ptr to Rx call on which this request came in.
408 * Nothing interesting.
412 *------------------------------------------------------------------------*/
413 /* called with no locks by RPC system when a server indicates that it has never
414 * heard from us, or for other reasons has had to discard callbacks from us
415 * without telling us, e.g. a network partition.
418 SRXAFSCB_InitCallBackState(struct rx_call *callp)
420 struct sockaddr_in taddr;
425 struct rx_connection *connp;
426 struct rx_peer *peerp;
427 unsigned long host = 0;
428 unsigned short port = 0;
430 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
431 host = rx_HostOf(peerp);
432 port = rx_PortOf(peerp);
435 osi_Log2(afsd_logp, "SRXAFSCB_InitCallBackState from host 0x%x port %d",
439 if ((rx_ConnectionOf(callp)) && (rx_PeerOf(rx_ConnectionOf(callp)))) {
440 taddr.sin_family = AF_INET;
441 taddr.sin_addr.s_addr = rx_HostOf(rx_PeerOf(rx_ConnectionOf(callp)));
443 tsp = cm_FindServer(&taddr, CM_SERVER_FILE);
445 osi_Log1(afsd_logp, "Init Callback State server %x", tsp);
447 /* record the callback in the racing revokes structure. This
448 * shouldn't be necessary, since we shouldn't be making callback
449 * granting calls while we're going to get an initstate call,
450 * but there probably are some obscure races, so better safe
453 * We do this first since we don't hold the cm_scacheLock and vnode
454 * locks over the entire callback scan operation below. The
455 * big loop below is guaranteed to hit any callback already
456 * processed. The call to RecordRacingRevoke is guaranteed
457 * to kill any callback that is currently being returned.
458 * Anything that sneaks past both must start
459 * after the call to RecordRacingRevoke.
461 cm_RecordRacingRevoke(NULL, CM_RACINGFLAG_CANCELALL);
463 /* now search all vnodes looking for guys with this callback, if we
464 * found it, or guys with any callbacks, if we didn't find the server
465 * (that's how multihomed machines will appear and how we'll handle
466 * them, albeit a little inefficiently). That is, we're discarding all
467 * callbacks from all hosts if we get an initstate call from an unknown
468 * host. Since these calls are rare, and multihomed servers
469 * are "rare," hopefully this won't be a problem.
471 lock_ObtainWrite(&cm_scacheLock);
472 for (hash = 0; hash < cm_data.scacheHashTableSize; hash++) {
473 for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
474 cm_HoldSCacheNoLock(scp);
475 lock_ReleaseWrite(&cm_scacheLock);
476 lock_ObtainWrite(&scp->rw);
478 if (scp->cbExpires > 0 && scp->cbServerp != NULL) {
479 /* we have a callback, now decide if we should clear it */
480 if (scp->cbServerp == tsp || tsp == NULL) {
481 osi_Log4(afsd_logp, "InitCallbackState Discarding SCache scp 0x%p vol %u vn %u uniq %u",
482 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
483 cm_DiscardSCache(scp);
487 lock_ReleaseWrite(&scp->rw);
489 cm_CallbackNotifyChange(scp);
490 lock_ObtainWrite(&cm_scacheLock);
491 cm_ReleaseSCacheNoLock(scp);
493 if (discarded && (scp->flags & CM_SCACHEFLAG_PURERO)) {
494 cm_volume_t *volp = cm_GetVolumeByFID(&scp->fid);
496 if (volp->cbExpiresRO != 0)
497 volp->cbExpiresRO = 0;
502 } /* search one hash bucket */
503 } /* search all hash buckets */
505 lock_ReleaseWrite(&cm_scacheLock);
508 /* reset the No flags on the server */
509 cm_SetServerNo64Bit(tsp, 0);
510 cm_SetServerNoInlineBulk(tsp, 0);
512 /* we're done with the server structure */
519 /*------------------------------------------------------------------------
520 * EXPORTED SRXAFSCB_Probe
523 * Routine called by the server-side callback RPC interface to
524 * implement ``probing'' the Cache Manager, just making sure it's
528 * rx_call : Ptr to Rx call on which this request came in.
534 * Nothing interesting.
538 *------------------------------------------------------------------------*/
540 SRXAFSCB_Probe(struct rx_call *callp)
542 struct rx_connection *connp;
543 struct rx_peer *peerp;
544 unsigned long host = 0;
545 unsigned short port = 0;
547 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
548 host = rx_HostOf(peerp);
549 port = rx_PortOf(peerp);
552 osi_Log2(afsd_logp, "SRXAFSCB_Probe from host 0x%x port %d",
559 /*------------------------------------------------------------------------
560 * EXPORTED SRXAFSCB_GetLock
563 * Routine called by the server-side callback RPC interface to
564 * implement pulling out the contents of a lock in the lock
568 * a_call : Ptr to Rx call on which this request came in.
569 * a_index : Index of desired lock.
570 * a_result : Ptr to a buffer for the given lock.
573 * 0 if everything went fine,
574 * 1 if we were given a bad index.
577 * Nothing interesting.
581 *------------------------------------------------------------------------*/
582 /* debug interface */
584 extern osi_rwlock_t cm_aclLock;
585 extern osi_rwlock_t buf_globalLock;
586 extern osi_rwlock_t cm_cellLock;
587 extern osi_rwlock_t cm_connLock;
588 extern osi_rwlock_t cm_daemonLock;
589 extern osi_rwlock_t cm_dnlcLock;
590 extern osi_rwlock_t cm_scacheLock;
591 extern osi_rwlock_t cm_serverLock;
592 extern osi_rwlock_t cm_syscfgLock;
593 extern osi_rwlock_t cm_userLock;
594 extern osi_rwlock_t cm_utilsLock;
595 extern osi_rwlock_t cm_volumeLock;
596 extern osi_rwlock_t smb_globalLock;
597 extern osi_rwlock_t smb_rctLock;
599 extern osi_mutex_t cm_Freelance_Lock;
600 extern osi_mutex_t cm_bufGetMutex;
601 extern osi_mutex_t cm_Afsdsbmt_Lock;
602 extern osi_mutex_t tokenEventLock;
603 extern osi_mutex_t smb_ListenerLock;
604 extern osi_mutex_t smb_RawBufLock;
605 extern osi_mutex_t smb_Dir_Watch_Lock;
607 #define LOCKTYPE_RW 1
608 #define LOCKTYPE_MUTEX 2
609 static struct _ltable {
614 {"cm_scacheLock", (char*)&cm_scacheLock, LOCKTYPE_RW},
615 {"buf_globalLock", (char*)&buf_globalLock, LOCKTYPE_RW},
616 {"cm_serverLock", (char*)&cm_serverLock, LOCKTYPE_RW},
617 {"cm_callbackLock", (char*)&cm_callbackLock, LOCKTYPE_RW},
618 {"cm_syscfgLock", (char*)&cm_syscfgLock, LOCKTYPE_RW},
619 {"cm_aclLock", (char*)&cm_aclLock, LOCKTYPE_RW},
620 {"cm_cellLock", (char*)&cm_cellLock, LOCKTYPE_RW},
621 {"cm_connLock", (char*)&cm_connLock, LOCKTYPE_RW},
622 {"cm_userLock", (char*)&cm_userLock, LOCKTYPE_RW},
623 {"cm_volumeLock", (char*)&cm_volumeLock, LOCKTYPE_RW},
624 {"cm_daemonLock", (char*)&cm_daemonLock, LOCKTYPE_RW},
625 {"cm_dnlcLock", (char*)&cm_dnlcLock, LOCKTYPE_RW},
626 {"cm_utilsLock", (char*)&cm_utilsLock, LOCKTYPE_RW},
627 {"smb_globalLock", (char*)&smb_globalLock, LOCKTYPE_RW},
628 {"smb_rctLock", (char*)&smb_rctLock, LOCKTYPE_RW},
629 {"cm_Freelance_Lock",(char*)&cm_Freelance_Lock, LOCKTYPE_MUTEX},
630 {"cm_bufGetMutex", (char*)&cm_bufGetMutex, LOCKTYPE_MUTEX},
631 {"cm_Afsdsbmt_Lock", (char*)&cm_Afsdsbmt_Lock, LOCKTYPE_MUTEX},
632 {"tokenEventLock", (char*)&tokenEventLock, LOCKTYPE_MUTEX},
633 {"smb_ListenerLock", (char*)&smb_ListenerLock, LOCKTYPE_MUTEX},
634 {"smb_RawBufLock", (char*)&smb_RawBufLock, LOCKTYPE_MUTEX},
635 {"smb_Dir_Watch_Lock",(char*)&smb_Dir_Watch_Lock, LOCKTYPE_MUTEX}
639 SRXAFSCB_GetLock(struct rx_call *callp, long index, AFSDBLock *lockp)
641 struct _ltable *tl; /*Ptr to lock table entry */
644 int nentries; /*Num entries in table */
645 int code; /*Return code */
646 struct rx_connection *connp;
647 struct rx_peer *peerp;
648 unsigned long host = 0;
649 unsigned short port = 0;
651 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
652 host = rx_HostOf(peerp);
653 port = rx_PortOf(peerp);
656 osi_Log3(afsd_logp, "SRXAFSCB_GetLock(%d) from host 0x%x port %d",
657 index, ntohl(host), ntohs(port));
659 nentries = sizeof(ltable) / sizeof(struct _ltable);
660 if (index < 0 || index >= nentries) {
667 * Found it - copy out its contents.
670 strncpy(lockp->name, tl->name, sizeof(lockp->name));
671 lockp->name[sizeof(lockp->name)-1] = '\0';
672 lockp->lock.waitStates = 0;
673 switch ( tl->type ) {
675 rwp = (osi_rwlock_t *)tl->addr;
676 lockp->lock.exclLocked = rwp->flags;
677 lockp->lock.readersReading = rwp->readers;
678 lockp->lock.numWaiting = rwp->waiters;
681 mtxp = (osi_mutex_t *)tl->addr;
682 lockp->lock.exclLocked = mtxp->flags;
683 lockp->lock.readersReading = 0;
684 lockp->lock.numWaiting = mtxp->waiters;
687 lockp->lock.pid_last_reader = 0;
688 lockp->lock.pid_writer = 0;
689 lockp->lock.src_indicator = 0;
696 /* debug interface */
698 SRXAFSCB_GetCE(struct rx_call *callp, long index, AFSDBCacheEntry *cep)
703 struct rx_connection *connp;
704 struct rx_peer *peerp;
705 unsigned long host = 0;
706 unsigned short port = 0;
708 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
709 host = rx_HostOf(peerp);
710 port = rx_PortOf(peerp);
713 osi_Log2(afsd_logp, "SRXAFSCB_GetCE from host 0x%x port %d",
714 ntohl(host), ntohs(port));
716 lock_ObtainRead(&cm_scacheLock);
717 for (i = 0; i < cm_data.scacheHashTableSize; i++) {
718 for (scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp) {
722 } /*Zip through current hash chain */
723 } /*Zip through hash chains */
733 * Copy out the located entry.
735 memset(cep, 0, sizeof(AFSDBCacheEntry));
736 cep->addr = afs_data_pointer_to_int32(scp);
737 cep->cell = scp->fid.cell;
738 cep->netFid.Volume = scp->fid.volume;
739 cep->netFid.Vnode = scp->fid.vnode;
740 cep->netFid.Unique = scp->fid.unique;
741 cep->lock.waitStates = 0;
742 cep->lock.exclLocked = scp->rw.flags;
743 cep->lock.readersReading = 0;
744 cep->lock.numWaiting = scp->rw.waiters;
745 cep->lock.pid_last_reader = 0;
746 cep->lock.pid_writer = 0;
747 cep->lock.src_indicator = 0;
748 cep->Length = scp->length.LowPart;
749 cep->DataVersion = (afs_uint32)(scp->dataVersion & 0xFFFFFFFF);
750 cep->callback = afs_data_pointer_to_int32(scp->cbServerp);
751 if (scp->flags & CM_SCACHEFLAG_PURERO) {
752 cm_volume_t *volp = cm_GetVolumeByFID(&scp->fid);
754 cep->cbExpires = volp->cbExpiresRO;
758 cep->cbExpires = scp->cbExpires;
759 cep->refCount = scp->refCount;
760 cep->opens = scp->openReads;
761 cep->writers = scp->openWrites;
762 switch (scp->fileType) {
763 case CM_SCACHETYPE_FILE:
766 case CM_SCACHETYPE_MOUNTPOINT:
769 case CM_SCACHETYPE_DIRECTORY:
770 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
775 case CM_SCACHETYPE_SYMLINK:
778 case CM_SCACHETYPE_DFSLINK:
781 case CM_SCACHETYPE_INVALID:
786 if (scp->flags & CM_SCACHEFLAG_STATD)
788 if (scp->flags & CM_SCACHEFLAG_RO || scp->flags & CM_SCACHEFLAG_PURERO)
790 if (scp->fileType == CM_SCACHETYPE_MOUNTPOINT &&
791 scp->mountPointStringp[0])
793 if (scp->flags & CM_SCACHEFLAG_WAITING)
798 * Return our results.
801 lock_ReleaseRead(&cm_scacheLock);
806 /* debug interface */
808 SRXAFSCB_GetCE64(struct rx_call *callp, long index, AFSDBCacheEntry64 *cep)
813 struct rx_connection *connp;
814 struct rx_peer *peerp;
815 unsigned long host = 0;
816 unsigned short port = 0;
818 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
819 host = rx_HostOf(peerp);
820 port = rx_PortOf(peerp);
823 osi_Log2(afsd_logp, "SRXAFSCB_GetCE64 from host 0x%x port %d",
824 ntohl(host), ntohs(port));
826 lock_ObtainRead(&cm_scacheLock);
827 for (i = 0; i < cm_data.scacheHashTableSize; i++) {
828 for (scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp) {
832 } /*Zip through current hash chain */
833 } /*Zip through hash chains */
843 * Copy out the located entry.
845 memset(cep, 0, sizeof(AFSDBCacheEntry64));
846 cep->addr = afs_data_pointer_to_int32(scp);
847 cep->cell = scp->fid.cell;
848 cep->netFid.Volume = scp->fid.volume;
849 cep->netFid.Vnode = scp->fid.vnode;
850 cep->netFid.Unique = scp->fid.unique;
851 cep->lock.waitStates = 0;
852 cep->lock.exclLocked = scp->rw.flags;
853 cep->lock.readersReading = 0;
854 cep->lock.numWaiting = scp->rw.waiters;
855 cep->lock.pid_last_reader = 0;
856 cep->lock.pid_writer = 0;
857 cep->lock.src_indicator = 0;
858 #if !defined(AFS_64BIT_ENV)
859 cep->Length.high = scp->length.HighPart;
860 cep->Length.low = scp->length.LowPart;
862 cep->Length = (afs_int64) scp->length.QuadPart;
864 cep->DataVersion = (afs_uint32)(scp->dataVersion & 0xFFFFFFFF);
865 cep->callback = afs_data_pointer_to_int32(scp->cbServerp);
866 if (scp->flags & CM_SCACHEFLAG_PURERO) {
867 cm_volume_t *volp = cm_GetVolumeByFID(&scp->fid);
869 cep->cbExpires = volp->cbExpiresRO;
873 cep->cbExpires = scp->cbExpires;
874 cep->refCount = scp->refCount;
875 cep->opens = scp->openReads;
876 cep->writers = scp->openWrites;
877 switch (scp->fileType) {
878 case CM_SCACHETYPE_FILE:
881 case CM_SCACHETYPE_MOUNTPOINT:
884 case CM_SCACHETYPE_DIRECTORY:
885 if (scp->fid.vnode == 1 && scp->fid.unique == 1)
890 case CM_SCACHETYPE_SYMLINK:
893 case CM_SCACHETYPE_DFSLINK:
896 case CM_SCACHETYPE_INVALID:
901 if (scp->flags & CM_SCACHEFLAG_STATD)
903 if (scp->flags & CM_SCACHEFLAG_RO || scp->flags & CM_SCACHEFLAG_PURERO)
905 if (scp->fileType == CM_SCACHETYPE_MOUNTPOINT &&
906 scp->mountPointStringp[0])
908 if (scp->flags & CM_SCACHEFLAG_WAITING)
913 * Return our results.
916 lock_ReleaseRead(&cm_scacheLock);
921 /* debug interface: not implemented */
923 SRXAFSCB_XStatsVersion(struct rx_call *callp, long *vp)
925 struct rx_connection *connp;
926 struct rx_peer *peerp;
927 unsigned long host = 0;
928 unsigned short port = 0;
930 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
931 host = rx_HostOf(peerp);
932 port = rx_PortOf(peerp);
935 osi_Log2(afsd_logp, "SRXAFSCB_XStatsVersion from host 0x%x port %d - not implemented",
936 ntohl(host), ntohs(port));
942 /* debug interface: not implemented */
944 SRXAFSCB_GetXStats(struct rx_call *callp, long cvn, long coln, long *srvp, long *timep,
945 AFSCB_CollData *datap)
947 struct rx_connection *connp;
948 struct rx_peer *peerp;
949 unsigned long host = 0;
950 unsigned short port = 0;
952 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
953 host = rx_HostOf(peerp);
954 port = rx_PortOf(peerp);
957 osi_Log2(afsd_logp, "SRXAFSCB_GetXStats from host 0x%x port %d - not implemented",
958 ntohl(host), ntohs(port));
964 SRXAFSCB_InitCallBackState2(struct rx_call *callp, struct interfaceAddr* addr)
966 osi_Log0(afsd_logp, "SRXAFSCB_InitCallBackState2 ->");
968 return SRXAFSCB_InitCallBackState(callp);
971 /* debug interface */
973 SRXAFSCB_WhoAreYou(struct rx_call *callp, struct interfaceAddr* addr)
977 struct rx_connection *connp;
978 struct rx_peer *peerp;
979 unsigned long host = 0;
980 unsigned short port = 0;
982 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
983 host = rx_HostOf(peerp);
984 port = rx_PortOf(peerp);
987 osi_Log2(afsd_logp, "SRXAFSCB_WhoAreYou from host 0x%x port %d",
991 lock_ObtainRead(&cm_syscfgLock);
992 if (cm_LanAdapterChangeDetected) {
993 lock_ConvertRToW(&cm_syscfgLock);
994 if (cm_LanAdapterChangeDetected) {
995 /* get network related info */
996 cm_noIPAddr = CM_MAXINTERFACE_ADDR;
997 code = syscfg_GetIFInfo(&cm_noIPAddr,
998 cm_IPAddr, cm_SubnetMask,
999 cm_NetMtu, cm_NetFlags);
1000 cm_LanAdapterChangeDetected = 0;
1002 lock_ConvertWToR(&cm_syscfgLock);
1005 /* return all network interface addresses */
1006 addr->numberOfInterfaces = cm_noIPAddr;
1007 addr->uuid = cm_data.Uuid;
1008 for ( i=0; i < cm_noIPAddr; i++ ) {
1009 addr->addr_in[i] = cm_IPAddr[i];
1010 addr->subnetmask[i] = cm_SubnetMask[i];
1011 addr->mtu[i] = (rx_mtu == -1 || (rx_mtu != -1 && cm_NetMtu[i] < rx_mtu)) ?
1012 cm_NetMtu[i] : rx_mtu;
1015 lock_ReleaseRead(&cm_syscfgLock);
1021 SRXAFSCB_InitCallBackState3(struct rx_call *callp, afsUUID* serverUuid)
1025 if (UuidToString((UUID *)serverUuid, &p) == RPC_S_OK) {
1026 osi_Log1(afsd_logp, "SRXAFSCB_InitCallBackState3 %s ->",osi_LogSaveString(afsd_logp,p));
1029 osi_Log0(afsd_logp, "SRXAFSCB_InitCallBackState3 - no server Uuid ->");
1031 return SRXAFSCB_InitCallBackState(callp);
1034 /* debug interface */
1036 SRXAFSCB_ProbeUuid(struct rx_call *callp, afsUUID* clientUuid)
1038 struct rx_connection *connp;
1039 struct rx_peer *peerp;
1040 unsigned long host = 0;
1041 unsigned short port = 0;
1045 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1046 host = rx_HostOf(peerp);
1047 port = rx_PortOf(peerp);
1050 if ( !afs_uuid_equal(&cm_data.Uuid, clientUuid) ) {
1051 UuidToString((UUID *)&cm_data.Uuid, &p);
1052 UuidToString((UUID *)clientUuid, &q);
1053 osi_Log4(afsd_logp, "SRXAFSCB_ProbeUuid %s != %s from host 0x%x port %d",
1054 osi_LogSaveString(afsd_logp,p),
1055 osi_LogSaveString(afsd_logp,q),
1061 code = 1; /* failure */
1063 osi_Log2(afsd_logp, "SRXAFSCB_ProbeUuid (success) from host 0x%x port %d",
1070 /* debug interface */
1072 GetCellCommon(afs_int32 a_cellnum, char **a_name, serverList *a_hosts)
1076 cm_serverRef_t * serverRefp;
1078 cellp = cm_FindCellByID(a_cellnum, CM_FLAG_NOPROBE);
1080 *a_name = strdup("");
1084 lock_ObtainRead(&cm_serverLock);
1085 *a_name = strdup(cellp->name);
1087 for ( sn = 0, serverRefp = cellp->vlServersp;
1088 sn < AFSMAXCELLHOSTS && serverRefp;
1089 sn++, serverRefp = serverRefp->next);
1091 a_hosts->serverList_len = sn;
1092 a_hosts->serverList_val = (afs_int32 *)osi_Alloc(sn * sizeof(afs_int32));
1094 for ( sn = 0, serverRefp = cellp->vlServersp;
1095 sn < AFSMAXCELLHOSTS && serverRefp;
1096 sn++, serverRefp = serverRefp->next)
1098 a_hosts->serverList_val[sn] = ntohl(serverRefp->server->addr.sin_addr.s_addr);
1101 lock_ReleaseRead(&cm_serverLock);
1105 /* debug interface */
1107 SRXAFSCB_GetCellByNum(struct rx_call *callp, afs_int32 a_cellnum,
1108 char **a_name, serverList *a_hosts)
1110 struct rx_connection *connp;
1111 struct rx_peer *peerp;
1112 unsigned long host = 0;
1113 unsigned short port = 0;
1116 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1117 host = rx_HostOf(peerp);
1118 port = rx_PortOf(peerp);
1121 osi_Log3(afsd_logp, "SRXAFSCB_GetCellByNum(%d) from host 0x%x port %d",
1122 a_cellnum, ntohl(host), ntohs(port));
1124 a_hosts->serverList_val = 0;
1125 a_hosts->serverList_len = 0;
1128 rc = GetCellCommon(a_cellnum, a_name, a_hosts);
1133 /* debug interface */
1135 SRXAFSCB_TellMeAboutYourself( struct rx_call *callp,
1136 struct interfaceAddr *addr,
1137 Capabilities * capabilities)
1140 afs_int32 *dataBuffP;
1141 afs_int32 dataBytes;
1143 struct rx_connection *connp;
1144 struct rx_peer *peerp;
1145 unsigned long host = 0;
1146 unsigned short port = 0;
1148 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1149 host = rx_HostOf(peerp);
1150 port = rx_PortOf(peerp);
1153 osi_Log2(afsd_logp, "SRXAFSCB_TellMeAboutYourself from host 0x%x port %d",
1157 lock_ObtainRead(&cm_syscfgLock);
1158 if (cm_LanAdapterChangeDetected) {
1159 lock_ConvertRToW(&cm_syscfgLock);
1160 if (cm_LanAdapterChangeDetected) {
1161 /* get network related info */
1162 cm_noIPAddr = CM_MAXINTERFACE_ADDR;
1163 code = syscfg_GetIFInfo(&cm_noIPAddr,
1164 cm_IPAddr, cm_SubnetMask,
1165 cm_NetMtu, cm_NetFlags);
1166 cm_LanAdapterChangeDetected = 0;
1168 lock_ConvertWToR(&cm_syscfgLock);
1171 /* return all network interface addresses */
1172 addr->numberOfInterfaces = cm_noIPAddr;
1173 addr->uuid = cm_data.Uuid;
1174 for ( i=0; i < cm_noIPAddr; i++ ) {
1175 addr->addr_in[i] = cm_IPAddr[i];
1176 addr->subnetmask[i] = cm_SubnetMask[i];
1177 addr->mtu[i] = (rx_mtu == -1 || (rx_mtu != -1 && cm_NetMtu[i] < rx_mtu)) ?
1178 cm_NetMtu[i] : rx_mtu;
1180 lock_ReleaseRead(&cm_syscfgLock);
1182 dataBytes = 1 * sizeof(afs_int32);
1183 dataBuffP = (afs_int32 *) osi_Alloc(dataBytes);
1184 dataBuffP[0] = CLIENT_CAPABILITY_ERRORTRANS;
1185 capabilities->Capabilities_len = dataBytes / sizeof(afs_int32);
1186 capabilities->Capabilities_val = dataBuffP;
1191 /*------------------------------------------------------------------------
1192 * EXPORTED SRXAFSCB_GetServerPrefs
1195 * Routine to list server preferences used by this client.
1198 * a_call : Ptr to Rx call on which this request came in.
1199 * a_index : Input server index
1200 * a_srvr_addr : Output server address (0xffffffff on last server)
1201 * a_srvr_rank : Output server rank
1207 * Nothing interesting.
1211 *------------------------------------------------------------------------*/
1213 int SRXAFSCB_GetServerPrefs(
1214 struct rx_call *callp,
1216 afs_int32 *a_srvr_addr,
1217 afs_int32 *a_srvr_rank)
1219 struct rx_connection *connp;
1220 struct rx_peer *peerp;
1221 unsigned long host = 0;
1222 unsigned short port = 0;
1224 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1225 host = rx_HostOf(peerp);
1226 port = rx_PortOf(peerp);
1229 osi_Log2(afsd_logp, "SRXAFSCB_GetServerPrefs from host 0x%x port %d - not implemented",
1233 *a_srvr_addr = 0xffffffff;
1234 *a_srvr_rank = 0xffffffff;
1239 /*------------------------------------------------------------------------
1240 * EXPORTED SRXAFSCB_GetCellServDB
1243 * Routine to list cells configured for this client
1246 * a_call : Ptr to Rx call on which this request came in.
1247 * a_index : Input cell index
1248 * a_name : Output cell name ("" on last cell)
1249 * a_hosts : Output cell database servers
1255 * Nothing interesting.
1259 *------------------------------------------------------------------------*/
1261 int SRXAFSCB_GetCellServDB(struct rx_call *callp, afs_int32 index, char **a_name,
1262 serverList *a_hosts)
1264 struct rx_connection *connp;
1265 struct rx_peer *peerp;
1266 unsigned long host = 0;
1267 unsigned short port = 0;
1270 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1271 host = rx_HostOf(peerp);
1272 port = rx_PortOf(peerp);
1275 osi_Log2(afsd_logp, "SRXAFSCB_GetCellServDB from host 0x%x port %d - not implemented",
1276 ntohl(host), ntohs(port));
1278 #ifdef AFS_FREELANCE_CLIENT
1279 if (cm_freelanceEnabled && index == 0) {
1280 rc = GetCellCommon(AFS_FAKE_ROOT_CELL_ID, a_name, a_hosts);
1284 rc = GetCellCommon(index+1, a_name, a_hosts);
1289 /*------------------------------------------------------------------------
1290 * EXPORTED SRXAFSCB_GetLocalCell
1293 * Routine to return name of client's local cell
1296 * a_call : Ptr to Rx call on which this request came in.
1297 * a_name : Output cell name
1303 * Nothing interesting.
1307 *------------------------------------------------------------------------*/
1309 int SRXAFSCB_GetLocalCell(struct rx_call *callp, char **a_name)
1312 struct rx_connection *connp;
1313 struct rx_peer *peerp;
1314 unsigned long host = 0;
1315 unsigned short port = 0;
1317 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1318 host = rx_HostOf(peerp);
1319 port = rx_PortOf(peerp);
1322 osi_Log2(afsd_logp, "SRXAFSCB_GetLocalCell from host 0x%x port %d",
1323 ntohl(host), ntohs(port));
1325 if (cm_data.rootCellp) {
1326 t_name = (char *)malloc(strlen(cm_data.rootCellp->name)+1);
1327 strcpy(t_name, cm_data.rootCellp->name);
1329 t_name = (char *)malloc(1);
1339 * afs_MarshallCacheConfig - marshall client cache configuration
1343 * IN callerVersion - the rpc stat version of the caller.
1345 * IN config - client cache configuration.
1347 * OUT ptr - buffer where configuration is marshalled.
1353 static void afs_MarshallCacheConfig(
1354 afs_uint32 callerVersion,
1355 cm_initparams_v1 *config,
1359 * We currently only support version 1.
1361 *(ptr++) = config->nChunkFiles;
1362 *(ptr++) = config->nStatCaches;
1363 *(ptr++) = config->nDataCaches;
1364 *(ptr++) = config->nVolumeCaches;
1365 *(ptr++) = config->firstChunkSize;
1366 *(ptr++) = config->otherChunkSize;
1367 *(ptr++) = config->cacheSize;
1368 *(ptr++) = config->setTime;
1369 *(ptr++) = config->memCache;
1374 /*------------------------------------------------------------------------
1375 * EXPORTED SRXAFSCB_GetCacheConfig
1378 * Routine to return parameters used to initialize client cache.
1379 * Client may request any format version. Server may not return
1380 * format version greater than version requested by client.
1383 * a_call: Ptr to Rx call on which this request came in.
1384 * callerVersion: Data format version desired by the client.
1385 * serverVersion: Data format version of output data.
1386 * configCount: Number bytes allocated for output data.
1387 * config: Client cache configuration.
1393 * Nothing interesting.
1397 *------------------------------------------------------------------------*/
1399 int SRXAFSCB_GetCacheConfig(struct rx_call *callp,
1400 afs_uint32 callerVersion,
1401 afs_uint32 *serverVersion,
1402 afs_uint32 *configCount,
1403 cacheConfig *config)
1405 afs_uint32 *t_config;
1407 extern cm_initparams_v1 cm_initParams;
1408 struct rx_connection *connp;
1409 struct rx_peer *peerp;
1410 unsigned long host = 0;
1411 unsigned short port = 0;
1413 if ((connp = rx_ConnectionOf(callp)) && (peerp = rx_PeerOf(connp))) {
1414 host = rx_HostOf(peerp);
1415 port = rx_PortOf(peerp);
1418 osi_Log2(afsd_logp, "SRXAFSCB_GetCacheConfig from host 0x%x port %d - version 1 only",
1419 ntohl(host), ntohs(port));
1422 * Currently only support version 1
1424 allocsize = sizeof(cm_initparams_v1);
1425 t_config = (afs_uint32 *)malloc(allocsize);
1427 afs_MarshallCacheConfig(callerVersion, &cm_initParams, t_config);
1429 *serverVersion = AFS_CLIENT_RETRIEVAL_FIRST_EDITION;
1432 #define SIZE_MAX UINT_MAX
1434 osi_assertx(allocsize < SIZE_MAX, "allocsize >= SIZE_MAX");
1436 *configCount = (afs_uint32)allocsize;
1437 config->cacheConfig_val = t_config;
1438 config->cacheConfig_len = (*configCount)/sizeof(afs_uint32);
1443 /* called by afsd without any locks to initialize this module */
1444 void cm_InitCallback(void)
1446 lock_InitializeRWLock(&cm_callbackLock, "cm_callbackLock");
1447 cm_activeCallbackGrantingCalls = 0;
1450 /* called with locked scp; tells us whether we've got a callback.
1451 * Expirations are checked by a background daemon so as to make
1452 * this function as inexpensive as possible
1454 int cm_HaveCallback(cm_scache_t *scp)
1456 #ifdef AFS_FREELANCE_CLIENT
1457 // yj: we handle callbacks specially for callbacks on the root directory
1458 // Since it's local, we almost always say that we have callback on it
1459 // The only time we send back a 0 is if we're need to initialize or
1460 // reinitialize the fake directory
1462 // There are 2 state variables cm_fakeGettingCallback and cm_fakeDirCallback
1463 // cm_fakeGettingCallback is 1 if we're in the process of initialization and
1464 // hence should return false. it's 0 otherwise
1465 // cm_fakeDirCallback is 0 if we haven't loaded the fake directory, it's 1
1466 // if the fake directory is loaded and this is the first time cm_HaveCallback
1467 // is called since then. We return false in this case to allow cm_GetCallback
1468 // to be called because cm_GetCallback has some initialization work to do.
1469 // If cm_fakeDirCallback is 2, then it means that the fake directory is in
1470 // good shape and we simply return true, provided no change is detected.
1473 if (cm_freelanceEnabled &&
1474 scp->fid.cell==AFS_FAKE_ROOT_CELL_ID && scp->fid.volume==AFS_FAKE_ROOT_VOL_ID) {
1475 /* if it's something on /afs */
1476 if (!(scp->fid.vnode==0x1 && scp->fid.unique==0x1)) {
1477 /* if it's not root.afs */
1481 lock_ObtainMutex(&cm_Freelance_Lock);
1482 fdc = cm_fakeDirCallback;
1483 fgc = cm_fakeGettingCallback;
1484 lock_ReleaseMutex(&cm_Freelance_Lock);
1486 if (fdc==1) { // first call since init
1488 } else if (fdc==2 && !fgc) { // we're in good shape
1489 if (cm_getLocalMountPointChange()) { // check for changes
1490 cm_clearLocalMountPointChange(); // clear the changefile
1491 lock_ReleaseWrite(&scp->rw); // this is re-locked in reInitLocalMountPoints
1492 cm_reInitLocalMountPoints(); // start reinit
1493 lock_ObtainWrite(&scp->rw); // now get the lock back
1496 return 1; // no change
1502 if (scp->cbServerp != NULL) {
1504 } else if (cm_OfflineROIsValid) {
1505 cm_volume_t *volp = cm_GetVolumeByFID(&scp->fid);
1507 switch (cm_GetVolumeStatus(volp, scp->fid.volume)) {
1523 /* need to detect a broken callback that races with our obtaining a callback.
1524 * Need to be able to do this even if we don't know the file ID of the file
1525 * we're breaking the callback on at the time we start the acquisition of the
1526 * callback (as in the case where we are creating a file).
1528 * So, we start by writing down the count of the # of callbacks we've received
1529 * so far, and bumping a global counter of the # of callback granting calls
1530 * outstanding (all done under cm_callbackLock).
1532 * When we're back from the call, we look at all of the callback revokes with
1533 * counter numbers greater than the one we recorded in our caller's structure,
1534 * and replay those that are higher than when we started the call.
1536 * We free all the structures in the queue when the count of the # of outstanding
1537 * callback-granting calls drops to zero.
1539 * We call this function with the scp locked, too, but in its current implementation,
1540 * this knowledge is not used.
1542 void cm_StartCallbackGrantingCall(cm_scache_t *scp, cm_callbackRequest_t *cbrp)
1544 lock_ObtainWrite(&cm_callbackLock);
1545 cbrp->callbackCount = cm_callbackCount;
1546 cm_activeCallbackGrantingCalls++;
1547 cbrp->startTime = time(NULL);
1548 cbrp->serverp = NULL;
1549 lock_ReleaseWrite(&cm_callbackLock);
1552 /* Called at the end of a callback-granting call, to remove the callback
1553 * info from the scache entry, if necessary.
1555 * Called with scp write locked, so we can discard the callbacks easily with
1556 * this locking hierarchy.
1558 void cm_EndCallbackGrantingCall(cm_scache_t *scp, cm_callbackRequest_t *cbrp,
1559 AFSCallBack *cbp, long flags)
1561 cm_racingRevokes_t *revp; /* where we are */
1562 cm_racingRevokes_t *nrevp; /* where we'll be next */
1564 cm_server_t * serverp = NULL;
1565 int discardScp = 0, discardVolCB = 0;
1567 lock_ObtainWrite(&cm_callbackLock);
1568 if (flags & CM_CALLBACK_MAINTAINCOUNT) {
1569 osi_assertx(cm_activeCallbackGrantingCalls > 0,
1570 "CM_CALLBACK_MAINTAINCOUNT && cm_activeCallbackGrantingCalls == 0");
1573 osi_assertx(cm_activeCallbackGrantingCalls-- > 0,
1574 "!CM_CALLBACK_MAINTAINCOUNT && cm_activeCallbackGrantingCalls == 0");
1576 if (cm_activeCallbackGrantingCalls == 0)
1581 /* record the callback; we'll clear it below if we really lose it */
1584 if (scp->cbServerp != cbrp->serverp) {
1585 serverp = scp->cbServerp;
1587 cm_GetServer(cbrp->serverp);
1588 scp->cbServerp = cbrp->serverp;
1591 serverp = cbrp->serverp;
1593 scp->cbExpires = cbrp->startTime + cbp->ExpirationTime;
1594 if (scp->flags & CM_SCACHEFLAG_PURERO) {
1595 cm_volume_t * volp = cm_GetVolumeByFID(&scp->fid);
1597 volp->cbExpiresRO = scp->cbExpires;
1603 serverp = cbrp->serverp;
1606 cbrp->serverp = NULL;
1609 /* a callback was actually revoked during our granting call, so
1610 * run down the list of revoked fids, looking for ours.
1611 * If activeCallbackGrantingCalls is zero, free the elements, too.
1613 * May need to go through entire list just to do the freeing.
1615 for (revp = cm_racingRevokesp; revp; revp = nrevp) {
1616 nrevp = (cm_racingRevokes_t *) osi_QNext(&revp->q);
1617 /* if this callback came in later than when we started the
1618 * callback-granting call, and if this fid is the right fid,
1619 * then clear the callback.
1621 if (scp && cbrp && cbrp->callbackCount != cm_callbackCount
1622 && revp->callbackCount > cbrp->callbackCount
1623 && (( scp->fid.volume == revp->fid.volume &&
1624 scp->fid.vnode == revp->fid.vnode &&
1625 scp->fid.unique == revp->fid.unique)
1627 ((revp->flags & CM_RACINGFLAG_CANCELVOL) &&
1628 scp->fid.volume == revp->fid.volume)
1630 (revp->flags & CM_RACINGFLAG_CANCELALL))) {
1631 /* this one matches */
1633 "Racing revoke scp 0x%p old cbc %d rev cbc %d cur cbc %d",
1635 cbrp->callbackCount, revp->callbackCount,
1638 if ((scp->flags & CM_SCACHEFLAG_PURERO) &&
1639 (revp->flags & (CM_RACINGFLAG_CANCELVOL | CM_RACINGFLAG_CANCELALL))) {
1640 cm_volume_t *volp = cm_GetVolumeByFID(&scp->fid);
1642 volp->cbExpiresRO = 0;
1651 /* if we freed the list, zap the pointer to it */
1653 cm_racingRevokesp = NULL;
1655 lock_ReleaseWrite(&cm_callbackLock);
1658 cm_DiscardSCache(scp);
1659 lock_ReleaseWrite(&scp->rw);
1660 cm_CallbackNotifyChange(scp);
1661 lock_ObtainWrite(&scp->rw);
1665 lock_ObtainWrite(&cm_serverLock);
1666 cm_FreeServer(serverp);
1667 lock_ReleaseWrite(&cm_serverLock);
1671 /* if flags is 1, we want to force the code to make one call, anyway.
1672 * called with locked scp; returns with same.
1674 long cm_GetCallback(cm_scache_t *scp, struct cm_user *userp,
1675 struct cm_req *reqp, long flags)
1678 cm_conn_t *connp = NULL;
1679 AFSFetchStatus afsStatus;
1681 AFSCallBack callback;
1683 cm_callbackRequest_t cbr;
1686 struct rx_connection * callp = NULL;
1687 int syncop_done = 0;
1689 osi_Log4(afsd_logp, "GetCallback scp 0x%p cell %d vol %d flags %lX",
1690 scp, scp->fid.cell, scp->fid.volume, flags);
1692 #ifdef AFS_FREELANCE_CLIENT
1693 // The case where a callback is needed on /afs is handled
1694 // specially. We need to fetch the status by calling
1695 // cm_MergeStatus and mark that cm_fakeDirCallback is 2
1696 if (cm_freelanceEnabled) {
1697 if (scp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
1698 scp->fid.volume==AFS_FAKE_ROOT_VOL_ID &&
1699 scp->fid.unique==0x1 &&
1700 scp->fid.vnode==0x1) {
1702 // Start by indicating that we're in the process
1703 // of fetching the callback
1704 lock_ObtainMutex(&cm_Freelance_Lock);
1705 osi_Log0(afsd_logp,"cm_getGetCallback fakeGettingCallback=1");
1706 cm_fakeGettingCallback = 1;
1707 lock_ReleaseMutex(&cm_Freelance_Lock);
1709 // Fetch the status info
1710 cm_MergeStatus(NULL, scp, &afsStatus, &volSync, userp, 0);
1712 // Indicate that the callback is not done
1713 lock_ObtainMutex(&cm_Freelance_Lock);
1714 osi_Log0(afsd_logp,"cm_getGetCallback fakeDirCallback=2");
1715 cm_fakeDirCallback = 2;
1717 // Indicate that we're no longer fetching the callback
1718 osi_Log0(afsd_logp,"cm_getGetCallback fakeGettingCallback=0");
1719 cm_fakeGettingCallback = 0;
1720 lock_ReleaseMutex(&cm_Freelance_Lock);
1725 if (scp->fid.cell==AFS_FAKE_ROOT_CELL_ID && scp->fid.volume==AFS_FAKE_ROOT_VOL_ID) {
1726 osi_Log0(afsd_logp,"cm_getcallback should NEVER EVER get here... ");
1729 #endif /* AFS_FREELANCE_CLIENT */
1731 mustCall = (flags & 1);
1732 cm_AFSFidFromFid(&tfid, &scp->fid);
1734 if (!mustCall && cm_HaveCallback(scp))
1737 /* turn off mustCall, since it has now forced us past the check above */
1740 /* otherwise, we have to make an RPC to get the status */
1742 code = cm_SyncOp(scp, NULL, userp, reqp, 0,
1743 CM_SCACHESYNC_FETCHSTATUS | CM_SCACHESYNC_GETCALLBACK);
1748 cm_StartCallbackGrantingCall(scp, &cbr);
1750 lock_ReleaseWrite(&scp->rw);
1752 /* now make the RPC */
1753 osi_Log4(afsd_logp, "CALL FetchStatus scp 0x%p vol %u vn %u uniq %u",
1754 scp, sfid.volume, sfid.vnode, sfid.unique);
1756 code = cm_ConnFromFID(&sfid, userp, reqp, &connp);
1760 callp = cm_GetRxConn(connp);
1761 code = RXAFS_FetchStatus(callp, &tfid,
1762 &afsStatus, &callback, &volSync);
1763 rx_PutConnection(callp);
1765 } while (cm_Analyze(connp, userp, reqp, &sfid, &volSync, NULL,
1767 code = cm_MapRPCError(code, reqp);
1769 osi_Log4(afsd_logp, "CALL FetchStatus FAILURE code 0x%x scp 0x%p vol %u vn %u",
1770 code, scp, scp->fid.volume, scp->fid.vnode);
1772 osi_Log4(afsd_logp, "CALL FetchStatus SUCCESS scp 0x%p vol %u vn %u uniq %u",
1773 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1775 lock_ObtainWrite(&scp->rw);
1777 cm_EndCallbackGrantingCall(scp, &cbr, &callback, 0);
1778 cm_MergeStatus(NULL, scp, &afsStatus, &volSync, userp, 0);
1780 cm_EndCallbackGrantingCall(NULL, &cbr, NULL, 0);
1783 /* if we got an error, return to caller */
1789 cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_FETCHSTATUS | CM_SCACHESYNC_GETCALLBACK);
1792 osi_Log2(afsd_logp, "GetCallback Failed code 0x%x scp 0x%p -->",code, scp);
1793 osi_Log4(afsd_logp, " cell %u vol %u vn %u uniq %u",
1794 scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1796 osi_Log3(afsd_logp, "GetCallback Complete scp 0x%p cell %d vol %d",
1797 scp, scp->fid.cell, scp->fid.volume);
1804 /* called with cm_scacheLock held */
1805 long cm_CBServersUp(cm_scache_t *scp, time_t * downTime)
1807 cm_vol_state_t *statep;
1809 afs_uint32 volID = scp->fid.volume;
1810 cm_serverRef_t *tsrp;
1815 if (scp->cbServerp == NULL)
1818 volp = cm_GetVolumeByFID(&scp->fid);
1819 if (volp->rw.ID == volID) {
1821 } else if (volp->ro.ID == volID) {
1823 } else if (volp->bk.ID == volID) {
1827 if (statep->state == vl_online)
1830 for (found = 0,tsrp = statep->serversp; tsrp; tsrp=tsrp->next) {
1831 if (tsrp->server == scp->cbServerp)
1833 if (tsrp->server->downTime > *downTime)
1834 *downTime = tsrp->server->downTime;
1837 /* if the cbServerp does not match the current volume server list
1838 * we report the callback server as up so the callback can be
1841 return(found ? 0 : 1);
1844 /* called periodically by cm_daemon to shut down use of expired callbacks */
1845 void cm_CheckCBExpiration(void)
1849 time_t now, downTime;
1851 osi_Log0(afsd_logp, "CheckCBExpiration");
1854 lock_ObtainWrite(&cm_scacheLock);
1855 for (i=0; i<cm_data.scacheHashTableSize; i++) {
1856 for (scp = cm_data.scacheHashTablep[i]; scp; scp=scp->nextp) {
1858 if (scp->flags & CM_SCACHEFLAG_PURERO) {
1859 cm_volume_t *volp = cm_GetVolumeByFID(&scp->fid);
1861 if (volp->cbExpiresRO > scp->cbExpires && scp->cbExpires > 0)
1862 scp->cbExpires = volp->cbExpiresRO;
1866 if (scp->cbServerp && scp->cbExpires > 0 && now > scp->cbExpires &&
1867 (cm_CBServersUp(scp, &downTime) || downTime == 0 || downTime >= scp->cbExpires))
1869 cm_HoldSCacheNoLock(scp);
1870 lock_ReleaseWrite(&cm_scacheLock);
1872 osi_Log4(afsd_logp, "Callback Expiration Discarding SCache scp 0x%p vol %u vn %u uniq %u",
1873 scp, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
1874 lock_ObtainWrite(&scp->rw);
1875 cm_DiscardSCache(scp);
1876 lock_ReleaseWrite(&scp->rw);
1877 cm_CallbackNotifyChange(scp);
1879 lock_ObtainWrite(&cm_scacheLock);
1880 cm_ReleaseSCacheNoLock(scp);
1884 lock_ReleaseWrite(&cm_scacheLock);
1886 osi_Log0(afsd_logp, "CheckCBExpiration Complete");
1891 cm_GiveUpAllCallbacks(cm_server_t *tsp, afs_int32 markDown)
1895 struct rx_connection * rxconnp;
1897 if ((tsp->type == CM_SERVER_FILE) && !(tsp->flags & CM_SERVERFLAG_DOWN))
1899 code = cm_ConnByServer(tsp, cm_rootUserp, &connp);
1901 rxconnp = cm_GetRxConn(connp);
1902 rx_SetConnDeadTime(rxconnp, 10);
1903 code = RXAFS_GiveUpAllCallBacks(rxconnp);
1904 rx_SetConnDeadTime(rxconnp, ConnDeadtimeout);
1905 rx_PutConnection(rxconnp);
1909 cm_server_vols_t * tsrvp;
1913 lock_ObtainMutex(&tsp->mx);
1914 if (!(tsp->flags & CM_SERVERFLAG_DOWN)) {
1915 tsp->flags |= CM_SERVERFLAG_DOWN;
1916 tsp->downTime = time(NULL);
1918 cm_ForceNewConnections(tsp);
1920 /* Now update the volume status */
1921 for (tsrvp = tsp->vols; tsrvp; tsrvp = tsrvp->nextp) {
1922 for (i=0; i<NUM_SERVER_VOLS; i++) {
1923 if (tsrvp->ids[i] != 0) {
1928 code = cm_FindVolumeByID(tsp->cellp, tsrvp->ids[i], cm_rootUserp,
1929 &req, CM_GETVOL_FLAG_NO_LRU_UPDATE | CM_GETVOL_FLAG_NO_RESET, &volp);
1931 cm_UpdateVolumeStatus(volp, tsrvp->ids[i]);
1937 lock_ReleaseMutex(&tsp->mx);
1943 cm_GiveUpAllCallbacksAllServers(afs_int32 markDown)
1947 if (!cm_giveUpAllCBs)
1950 lock_ObtainWrite(&cm_serverLock);
1951 for (tsp = cm_allServersp; tsp; tsp = tsp->allNextp) {
1952 cm_GetServerNoLock(tsp);
1953 lock_ReleaseWrite(&cm_serverLock);
1954 cm_GiveUpAllCallbacks(tsp, markDown);
1955 lock_ObtainWrite(&cm_serverLock);
1956 cm_PutServerNoLock(tsp);
1958 lock_ReleaseWrite(&cm_serverLock);