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
19 * afs_FlushActiveVcaches
22 * afs_WriteVCacheDiscon
40 #include <afsconfig.h>
41 #include "afs/param.h"
43 #include "afs/sysincludes.h" /*Standard vendor system headers */
44 #include "afsincludes.h" /*AFS-based standard headers */
45 #include "afs/afs_stats.h"
46 #include "afs/afs_cbqueue.h"
47 #include "afs/afs_osidnlc.h"
49 afs_int32 afs_maxvcount = 0; /* max number of vcache entries */
50 afs_int32 afs_vcount = 0; /* number of vcache in use now */
58 #endif /* AFS_SGI64_ENV */
60 /* Exported variables */
61 afs_rwlock_t afs_xvcdirty; /*Lock: discon vcache dirty list mgmt */
62 afs_rwlock_t afs_xvcache; /*Lock: alloc new stat cache entries */
63 afs_rwlock_t afs_xvreclaim; /*Lock: entries reclaimed, not on free list */
64 afs_lock_t afs_xvcb; /*Lock: fids on which there are callbacks */
65 #if !defined(AFS_LINUX22_ENV)
66 static struct vcache *freeVCList; /*Free list for stat cache entries */
67 struct vcache *ReclaimedVCList; /*Reclaimed list for stat entries */
68 static struct vcache *Initial_freeVCList; /*Initial list for above */
70 struct afs_q VLRU; /*vcache LRU */
71 afs_int32 vcachegen = 0;
72 unsigned int afs_paniconwarn = 0;
73 struct vcache *afs_vhashT[VCSIZE];
74 struct afs_q afs_vhashTV[VCSIZE];
75 static struct afs_cbr *afs_cbrHashT[CBRSIZE];
76 afs_int32 afs_bulkStatsLost;
77 int afs_norefpanic = 0;
80 /* Disk backed vcache definitions
81 * Both protected by xvcache */
82 static int afs_nextVcacheSlot = 0;
83 static struct afs_slotlist *afs_freeSlotList = NULL;
85 /* Forward declarations */
86 static afs_int32 afs_QueueVCB(struct vcache *avc, int *slept);
90 * The PFlush algorithm makes use of the fact that Fid.Unique is not used in
91 * below hash algorithms. Change it if need be so that flushing algorithm
92 * doesn't move things from one hash chain to another.
94 /* Don't hash on the cell; our callback-breaking code sometimes fails to compute
95 * the cell correctly, and only scans one hash bucket. */
96 int VCHash(struct VenusFid *fid)
98 return opr_jhash_int2(fid->Fid.Volume, fid->Fid.Vnode, 0) &
99 opr_jhash_mask(VCSIZEBITS);
101 /* Hash only on volume to speed up volume callbacks. */
102 int VCHashV(struct VenusFid *fid)
104 return opr_jhash_int(fid->Fid.Volume, 0) & opr_jhash_mask(VCSIZEBITS);
108 * Generate an index into the hash table for a given Fid.
110 * \return The hash value.
113 afs_HashCBRFid(struct AFSFid *fid)
115 return (fid->Volume + fid->Vnode + fid->Unique) % CBRSIZE;
119 * Insert a CBR entry into the hash table.
120 * Must be called with afs_xvcb held.
125 afs_InsertHashCBR(struct afs_cbr *cbr)
127 int slot = afs_HashCBRFid(&cbr->fid);
129 cbr->hash_next = afs_cbrHashT[slot];
130 if (afs_cbrHashT[slot])
131 afs_cbrHashT[slot]->hash_pprev = &cbr->hash_next;
133 cbr->hash_pprev = &afs_cbrHashT[slot];
134 afs_cbrHashT[slot] = cbr;
139 * Flush the given vcache entry.
142 * afs_xvcache lock must be held for writing upon entry to
143 * prevent people from changing the vrefCount field, and to
144 * protect the lruq and hnext fields.
145 * LOCK: afs_FlushVCache afs_xvcache W
146 * REFCNT: vcache ref count must be zero on entry except for osf1
147 * RACE: lock is dropped and reobtained, permitting race in caller
149 * \param avc Pointer to vcache entry to flush.
150 * \param slept Pointer to int to set 1 if we sleep/drop locks, 0 if we don't.
154 afs_FlushVCache(struct vcache *avc, int *slept)
155 { /*afs_FlushVCache */
158 struct vcache **uvc, *wvc;
160 /* NOTE: We must have nothing drop afs_xvcache until we have removed all
161 * possible references to this vcache. This means all hash tables, queues,
165 AFS_STATCNT(afs_FlushVCache);
166 afs_Trace2(afs_iclSetp, CM_TRACE_FLUSHV, ICL_TYPE_POINTER, avc,
167 ICL_TYPE_INT32, avc->f.states);
169 code = osi_VM_FlushVCache(avc);
173 if (avc->f.states & CVFlushed) {
177 #if !defined(AFS_LINUX22_ENV)
178 if (avc->nextfree || !avc->vlruq.prev || !avc->vlruq.next) { /* qv afs.h */
179 refpanic("LRU vs. Free inconsistency");
182 avc->f.states |= CVFlushed;
183 /* pull the entry out of the lruq and put it on the free list */
184 QRemove(&avc->vlruq);
186 /* keep track of # of files that we bulk stat'd, but never used
187 * before they got recycled.
189 if (avc->f.states & CBulkStat)
192 /* remove entry from the hash chain */
193 i = VCHash(&avc->f.fid);
194 uvc = &afs_vhashT[i];
195 for (wvc = *uvc; wvc; uvc = &wvc->hnext, wvc = *uvc) {
203 /* remove entry from the volume hash table */
204 QRemove(&avc->vhashq);
206 #if defined(AFS_LINUX26_ENV)
208 struct pagewriter *pw, *store;
209 struct list_head tofree;
211 INIT_LIST_HEAD(&tofree);
212 spin_lock(&avc->pagewriter_lock);
213 list_for_each_entry_safe(pw, store, &avc->pagewriters, link) {
215 /* afs_osi_Free may sleep so we need to defer it */
216 list_add_tail(&pw->link, &tofree);
218 spin_unlock(&avc->pagewriter_lock);
219 list_for_each_entry_safe(pw, store, &tofree, link) {
221 afs_osi_Free(pw, sizeof(struct pagewriter));
226 if (avc->mvid.target_root)
227 osi_FreeSmallSpace(avc->mvid.target_root);
228 avc->mvid.target_root = NULL;
230 afs_osi_Free(avc->linkData, strlen(avc->linkData) + 1);
231 avc->linkData = NULL;
233 #if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV)
234 /* OK, there are no internal vrefCounts, so there shouldn't
235 * be any more refs here. */
237 #ifdef AFS_DARWIN80_ENV
238 vnode_clearfsnode(AFSTOV(avc));
239 vnode_removefsref(AFSTOV(avc));
241 avc->v->v_data = NULL; /* remove from vnode */
243 AFSTOV(avc) = NULL; /* also drop the ptr to vnode */
247 #ifdef AFS_SUN511_ENV
252 #elif defined(AFS_SUN510_ENV)
253 /* As we use private vnodes, cleanup is up to us */
254 vn_reinit(AFSTOV(avc));
256 afs_FreeAllAxs(&(avc->Access));
257 afs_StaleVCacheFlags(avc, AFS_STALEVC_FILENAME, CUnique);
259 /* By this point, the vcache has been removed from all global structures
260 * via which someone could try to use the vcache. It is okay to drop
261 * afs_xvcache at this point (if *slept is set). */
263 if (afs_shuttingdown == AFS_RUNNING)
264 afs_QueueVCB(avc, slept);
267 * Next, keep track of which vnodes we've deleted for create's
268 * optimistic synchronization algorithm
271 if (avc->f.fid.Fid.Vnode & 1)
277 #if !defined(AFS_LINUX22_ENV)
278 /* put the entry in the free list */
279 avc->nextfree = freeVCList;
281 if (avc->vlruq.prev || avc->vlruq.next) {
282 refpanic("LRU vs. Free inconsistency");
284 avc->f.states |= CVFlushed;
286 /* This should put it back on the vnode free list since usecount is 1 */
288 if (VREFCOUNT_GT(avc,0)) {
289 AFS_RELE(AFSTOV(avc));
290 afs_stats_cmperf.vcacheXAllocs--;
292 if (afs_norefpanic) {
293 afs_warn("flush vc refcnt < 1");
296 osi_Panic("flush vc refcnt < 1");
298 #endif /* AFS_LINUX22_ENV */
303 } /*afs_FlushVCache */
307 * The core of the inactive vnode op for all but IRIX.
313 afs_InactiveVCache(struct vcache *avc, afs_ucred_t *acred)
315 AFS_STATCNT(afs_inactive);
316 if (avc->f.states & CDirty) {
317 /* we can't keep trying to push back dirty data forever. Give up. */
318 afs_InvalidateAllSegments(avc); /* turns off dirty bit */
320 avc->f.states &= ~CMAPPED; /* mainly used by SunOS 4.0.x */
321 avc->f.states &= ~CDirty; /* Turn it off */
322 if (avc->f.states & CUnlinked) {
323 if (CheckLock(&afs_xvcache) || CheckLock(&afs_xdcache)) {
324 avc->f.states |= CUnlinkedDel;
327 afs_remunlink(avc, 1); /* ignore any return code */
334 * Allocate a callback return structure from the
335 * free list and return it.
337 * Environment: The alloc and free routines are both called with the afs_xvcb lock
338 * held, so we don't have to worry about blocking in osi_Alloc.
340 * \return The allocated afs_cbr.
342 static struct afs_cbr *afs_cbrSpace = 0;
343 /* if alloc limit below changes, fix me! */
344 static struct afs_cbr *afs_cbrHeads[16];
351 while (!afs_cbrSpace) {
352 if (afs_stats_cmperf.CallBackAlloced >= sizeof(afs_cbrHeads)/sizeof(afs_cbrHeads[0])) {
353 /* don't allocate more than 16 * AFS_NCBRS for now */
355 afs_stats_cmperf.CallBackFlushes++;
358 tsp = afs_osi_Alloc(AFS_NCBRS * sizeof(struct afs_cbr));
359 osi_Assert(tsp != NULL);
360 for (i = 0; i < AFS_NCBRS - 1; i++) {
361 tsp[i].next = &tsp[i + 1];
363 tsp[AFS_NCBRS - 1].next = 0;
365 afs_cbrHeads[afs_stats_cmperf.CallBackAlloced] = tsp;
366 afs_stats_cmperf.CallBackAlloced++;
370 afs_cbrSpace = tsp->next;
375 * Free a callback return structure, removing it from all lists.
377 * Environment: the xvcb lock is held over these calls.
379 * \param asp The address of the structure to free.
384 afs_FreeCBR(struct afs_cbr *asp)
386 *(asp->pprev) = asp->next;
388 asp->next->pprev = asp->pprev;
390 *(asp->hash_pprev) = asp->hash_next;
392 asp->hash_next->hash_pprev = asp->hash_pprev;
394 asp->next = afs_cbrSpace;
400 FlushAllVCBs(int nconns, struct rx_connection **rxconns,
401 struct afs_conn **conns)
406 results = afs_osi_Alloc(nconns * sizeof (afs_int32));
407 osi_Assert(results != NULL);
410 multi_Rx(rxconns,nconns)
412 multi_RXAFS_GiveUpAllCallBacks();
413 results[multi_i] = multi_error;
418 * Freeing the CBR will unlink it from the server's CBR list
419 * do it here, not in the loop, because a dynamic CBR will call
420 * into the memory management routines.
422 for ( i = 0 ; i < nconns ; i++ ) {
423 if (results[i] == 0) {
424 /* Unchain all of them */
425 while (conns[i]->parent->srvr->server->cbrs)
426 afs_FreeCBR(conns[i]->parent->srvr->server->cbrs);
429 afs_osi_Free(results, nconns * sizeof(afs_int32));
433 * Flush all queued callbacks to all servers.
435 * Environment: holds xvcb lock over RPC to guard against race conditions
436 * when a new callback is granted for the same file later on.
438 * \return 0 for success.
441 afs_FlushVCBs(afs_int32 lockit)
443 struct AFSFid *tfids;
444 struct AFSCallBack callBacks[1];
445 struct AFSCBFids fidArray;
446 struct AFSCBs cbArray;
448 struct afs_cbr *tcbrp;
452 struct vrequest *treq = NULL;
454 int safety1, safety2, safety3;
457 if (AFS_IS_DISCONNECTED)
460 if ((code = afs_CreateReq(&treq, afs_osi_credp)))
462 treq->flags |= O_NONBLOCK;
463 tfids = afs_osi_Alloc(sizeof(struct AFSFid) * AFS_MAXCBRSCALL);
464 osi_Assert(tfids != NULL);
467 ObtainWriteLock(&afs_xvcb, 273);
470 * First, attempt a multi across everything, all addresses
471 * for all servers we know of.
475 afs_LoopServers(AFS_LS_ALL, NULL, 0, FlushAllVCBs, NULL);
477 ObtainReadLock(&afs_xserver);
478 for (i = 0; i < NSERVERS; i++) {
479 for (safety1 = 0, tsp = afs_servers[i];
480 tsp && safety1 < afs_totalServers + 10;
481 tsp = tsp->next, safety1++) {
483 if (tsp->cbrs == (struct afs_cbr *)0)
486 /* otherwise, grab a block of AFS_MAXCBRSCALL from the list
487 * and make an RPC, over and over again.
489 tcount = 0; /* number found so far */
490 for (safety2 = 0; safety2 < afs_cacheStats; safety2++) {
491 if (tcount >= AFS_MAXCBRSCALL || !tsp->cbrs) {
492 struct rx_connection *rxconn;
493 /* if buffer is full, or we've queued all we're going
494 * to from this server, we should flush out the
497 fidArray.AFSCBFids_len = tcount;
498 fidArray.AFSCBFids_val = (struct AFSFid *)tfids;
499 cbArray.AFSCBs_len = 1;
500 cbArray.AFSCBs_val = callBacks;
501 memset(&callBacks[0], 0, sizeof(callBacks[0]));
502 callBacks[0].CallBackType = CB_EXCLUSIVE;
503 for (safety3 = 0; safety3 < AFS_MAXHOSTS * 2; safety3++) {
504 tc = afs_ConnByHost(tsp, tsp->cell->fsport,
505 tsp->cell->cellNum, treq, 0,
506 SHARED_LOCK, 0, &rxconn);
509 (AFS_STATS_FS_RPCIDX_GIVEUPCALLBACKS);
512 RXAFS_GiveUpCallBacks(rxconn, &fidArray,
519 (tc, rxconn, code, 0, treq,
520 AFS_STATS_FS_RPCIDX_GIVEUPCALLBACKS, SHARED_LOCK,
525 /* ignore return code, since callbacks may have
526 * been returned anyway, we shouldn't leave them
527 * around to be returned again.
529 * Next, see if we are done with this server, and if so,
530 * break to deal with the next one.
536 /* if to flush full buffer */
537 /* if we make it here, we have an entry at the head of cbrs,
538 * which we should copy to the file ID array and then free.
541 tfids[tcount++] = tcbrp->fid;
543 /* Freeing the CBR will unlink it from the server's CBR list */
545 } /* while loop for this one server */
546 if (safety2 > afs_cacheStats) {
547 afs_warn("possible internal error afs_flushVCBs (%d)\n",
550 } /* for loop for this hash chain */
551 } /* loop through all hash chains */
552 if (safety1 > afs_totalServers + 2) {
554 ("AFS internal error (afs_flushVCBs) (%d > %d), continuing...\n",
555 safety1, afs_totalServers + 2);
557 osi_Panic("afs_flushVCBS safety1");
560 ReleaseReadLock(&afs_xserver);
562 ReleaseWriteLock(&afs_xvcb);
563 afs_osi_Free(tfids, sizeof(struct AFSFid) * AFS_MAXCBRSCALL);
564 afs_DestroyReq(treq);
569 * Queue a callback on the given fid.
572 * Locks the xvcb lock.
573 * Called when the xvcache lock is already held.
574 * RACE: afs_xvcache may be dropped and reacquired
576 * \param avc vcache entry
577 * \param slep Set to 1 if we dropped afs_xvcache
578 * \return 1 if queued, 0 otherwise
582 afs_QueueVCB(struct vcache *avc, int *slept)
586 struct afs_cbr *tcbp;
589 AFS_STATCNT(afs_QueueVCB);
591 ObtainWriteLock(&afs_xvcb, 274);
593 /* we can't really give back callbacks on RO files, since the
594 * server only tracks them on a per-volume basis, and we don't
595 * know whether we still have some other files from the same
597 if (!((avc->f.states & CRO) == 0 && avc->callback)) {
601 /* The callback is really just a struct server ptr. */
602 tsp = (struct server *)(avc->callback);
605 /* If we don't have CBR space, AllocCBR may block or hit the net for
606 * clearing up CBRs. Hitting the net may involve a fileserver
607 * needing to contact us, so we must drop xvcache so we don't block
608 * those requests from going through. */
609 reacquire = *slept = 1;
610 ReleaseWriteLock(&afs_xvcache);
613 /* we now have a pointer to the server, so we just allocate
614 * a queue entry and queue it.
616 tcbp = afs_AllocCBR();
617 tcbp->fid = avc->f.fid.Fid;
619 tcbp->next = tsp->cbrs;
621 tsp->cbrs->pprev = &tcbp->next;
624 tcbp->pprev = &tsp->cbrs;
626 afs_InsertHashCBR(tcbp);
630 /* now release locks and return */
631 ReleaseWriteLock(&afs_xvcb);
634 /* make sure this is after dropping xvcb, for locking order */
635 ObtainWriteLock(&afs_xvcache, 279);
642 * Remove a queued callback for a given Fid.
645 * Locks xvcb and xserver locks.
646 * Typically called with xdcache, xvcache and/or individual vcache
649 * \param afid The fid we want cleansed of queued callbacks.
654 afs_RemoveVCB(struct VenusFid *afid)
657 struct afs_cbr *cbr, *ncbr;
659 AFS_STATCNT(afs_RemoveVCB);
660 ObtainWriteLock(&afs_xvcb, 275);
662 slot = afs_HashCBRFid(&afid->Fid);
663 ncbr = afs_cbrHashT[slot];
667 ncbr = cbr->hash_next;
669 if (afid->Fid.Volume == cbr->fid.Volume &&
670 afid->Fid.Vnode == cbr->fid.Vnode &&
671 afid->Fid.Unique == cbr->fid.Unique) {
676 ReleaseWriteLock(&afs_xvcb);
680 afs_FlushReclaimedVcaches(void)
682 #if !defined(AFS_LINUX22_ENV)
685 struct vcache *tmpReclaimedVCList = NULL;
687 ObtainWriteLock(&afs_xvreclaim, 76);
688 while (ReclaimedVCList) {
689 tvc = ReclaimedVCList; /* take from free list */
690 ReclaimedVCList = tvc->nextfree;
691 tvc->nextfree = NULL;
692 code = afs_FlushVCache(tvc, &fv_slept);
694 /* Ok, so, if we got code != 0, uh, wtf do we do? */
695 /* Probably, build a temporary list and then put all back when we
696 get to the end of the list */
697 /* This is actually really crappy, but we need to not leak these.
698 We probably need a way to be smarter about this. */
699 tvc->nextfree = tmpReclaimedVCList;
700 tmpReclaimedVCList = tvc;
701 /* printf("Reclaim list flush %lx failed: %d\n", (unsigned long) tvc, code); */
703 if (tvc->f.states & (CVInit
704 #ifdef AFS_DARWIN80_ENV
708 tvc->f.states &= ~(CVInit
709 #ifdef AFS_DARWIN80_ENV
713 afs_osi_Wakeup(&tvc->f.states);
716 if (tmpReclaimedVCList)
717 ReclaimedVCList = tmpReclaimedVCList;
719 ReleaseWriteLock(&afs_xvreclaim);
724 afs_PostPopulateVCache(struct vcache *avc, struct VenusFid *afid, int seq)
727 * The proper value for mvstat (for root fids) is setup by the caller.
729 avc->mvstat = AFS_MVSTAT_FILE;
730 if (afid->Fid.Vnode == 1 && afid->Fid.Unique == 1)
731 avc->mvstat = AFS_MVSTAT_ROOT;
733 if (afs_globalVFS == 0)
734 osi_Panic("afs globalvfs");
736 osi_PostPopulateVCache(avc);
739 osi_dnlc_purgedp(avc); /* this may be overkill */
740 memset(&(avc->callsort), 0, sizeof(struct afs_q));
742 avc->f.states &=~ CVInit;
744 avc->f.states |= CBulkFetching;
745 avc->f.m.Length = seq;
747 afs_osi_Wakeup(&avc->f.states);
751 afs_ShakeLooseVCaches(afs_int32 anumber)
756 struct afs_q *tq, *uq;
757 int fv_slept, defersleep = 0;
759 afs_int32 target = anumber;
766 for (tq = VLRU.prev; tq != &VLRU && anumber > 0; tq = uq) {
769 if (tvc->f.states & CVFlushed) {
770 refpanic("CVFlushed on VLRU");
771 } else if (i++ > limit) {
772 afs_warn("afs_ShakeLooseVCaches: i %d limit %d afs_vcount %d afs_maxvcount %d\n",
773 (int)i, limit, (int)afs_vcount, (int)afs_maxvcount);
774 refpanic("Found too many AFS vnodes on VLRU (VLRU cycle?)");
775 } else if (QNext(uq) != tq) {
776 refpanic("VLRU inconsistent");
777 } else if (tvc->f.states & CVInit) {
782 evicted = osi_TryEvictVCache(tvc, &fv_slept, defersleep);
792 * This vcache was busy and we slept while trying to evict it.
793 * Move this busy vcache to the head of the VLRU so vcaches
794 * following this busy vcache can be evicted during the retry.
796 QRemove(&tvc->vlruq);
797 QAdd(&VLRU, &tvc->vlruq);
799 goto retry; /* start over - may have raced. */
802 if (anumber && !defersleep) {
809 if (!afsd_dynamic_vcaches && anumber == target) {
810 afs_warn("afs_ShakeLooseVCaches: warning none freed, using %d of %d\n",
811 afs_vcount, afs_maxvcount);
817 /* Alloc new vnode. */
819 static struct vcache *
820 afs_AllocVCache(void)
824 tvc = osi_NewVnode();
829 if (afsd_dynamic_vcaches && afs_maxvcount < afs_vcount) {
830 afs_maxvcount = afs_vcount;
831 /*printf("peak vnodes: %d\n", afs_maxvcount);*/
834 afs_stats_cmperf.vcacheXAllocs++; /* count in case we have a leak */
836 /* If we create a new inode, we either give it a new slot number,
837 * or if one's available, use a slot number from the slot free list
839 if (afs_freeSlotList != NULL) {
840 struct afs_slotlist *tmp;
842 tvc->diskSlot = afs_freeSlotList->slot;
843 tmp = afs_freeSlotList;
844 afs_freeSlotList = tmp->next;
845 afs_osi_Free(tmp, sizeof(struct afs_slotlist));
847 tvc->diskSlot = afs_nextVcacheSlot++;
853 /* Pre populate a newly allocated vcache. On platforms where the actual
854 * vnode is attached to the vcache, this function is called before attachment,
855 * therefore it cannot perform any actions on the vnode itself */
858 afs_PrePopulateVCache(struct vcache *avc, struct VenusFid *afid,
859 struct server *serverp) {
863 slot = avc->diskSlot;
865 osi_PrePopulateVCache(avc);
867 avc->diskSlot = slot;
868 QZero(&avc->metadirty);
870 AFS_RWLOCK_INIT(&avc->lock, "vcache lock");
872 memset(&avc->mvid, 0, sizeof(avc->mvid));
873 avc->linkData = NULL;
876 avc->execsOrWriters = 0;
878 avc->f.states = CVInit;
879 avc->last_looker = 0;
881 avc->asynchrony = -1;
885 avc->f.truncPos = AFS_NOTRUNC; /* don't truncate until we need to */
887 afs_SetDataVersion(avc, &zero); /* in case we copy it into flushDV */
889 avc->callback = serverp; /* to minimize chance that clear
892 #if defined(AFS_CACHE_BYPASS)
893 avc->cachingStates = 0;
894 avc->cachingTransitions = 0;
899 afs_FlushAllVCaches(void)
902 struct vcache *tvc, *nvc;
904 ObtainWriteLock(&afs_xvcache, 867);
907 for (i = 0; i < VCSIZE; i++) {
908 for (tvc = afs_vhashT[i]; tvc; tvc = nvc) {
912 if (afs_FlushVCache(tvc, &slept)) {
913 afs_warn("Failed to flush vcache 0x%lx\n", (unsigned long)(uintptrsz)tvc);
921 ReleaseWriteLock(&afs_xvcache);
925 * This routine is responsible for allocating a new cache entry
926 * from the free list. It formats the cache entry and inserts it
927 * into the appropriate hash tables. It must be called with
928 * afs_xvcache write-locked so as to prevent several processes from
929 * trying to create a new cache entry simultaneously.
931 * LOCK: afs_NewVCache afs_xvcache W
933 * \param afid The file id of the file whose cache entry is being created.
935 * \return The new vcache struct.
938 static_inline struct vcache *
939 afs_NewVCache_int(struct VenusFid *afid, struct server *serverp, int seq)
943 afs_int32 anumber = VCACHE_FREE;
945 AFS_STATCNT(afs_NewVCache);
947 afs_FlushReclaimedVcaches();
949 #if defined(AFS_LINUX22_ENV)
950 if(!afsd_dynamic_vcaches && afs_vcount >= afs_maxvcount) {
951 afs_ShakeLooseVCaches(anumber);
952 if (afs_vcount >= afs_maxvcount) {
953 afs_warn("afs_NewVCache - none freed\n");
957 tvc = afs_AllocVCache();
958 #else /* AFS_LINUX22_ENV */
959 /* pull out a free cache entry */
961 afs_ShakeLooseVCaches(anumber);
965 tvc = afs_AllocVCache();
967 tvc = freeVCList; /* take from free list */
968 freeVCList = tvc->nextfree;
969 tvc->nextfree = NULL;
970 afs_vcount++; /* balanced by FlushVCache */
971 } /* end of if (!freeVCList) */
973 #endif /* AFS_LINUX22_ENV */
975 #if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV)
977 panic("afs_NewVCache(): free vcache with vnode attached");
980 /* Populate the vcache with as much as we can. */
981 afs_PrePopulateVCache(tvc, afid, serverp);
983 /* Thread the vcache onto the VLRU */
988 tvc->hnext = afs_vhashT[i];
990 QAdd(&afs_vhashTV[j], &tvc->vhashq);
992 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
993 refpanic("NewVCache VLRU inconsistent");
995 QAdd(&VLRU, &tvc->vlruq); /* put in lruq */
996 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
997 refpanic("NewVCache VLRU inconsistent2");
999 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
1000 refpanic("NewVCache VLRU inconsistent3");
1002 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
1003 refpanic("NewVCache VLRU inconsistent4");
1007 /* it should now be safe to drop the xvcache lock - so attach an inode
1008 * to this vcache, where necessary */
1009 osi_AttachVnode(tvc, seq);
1011 /* Get a reference count to hold this vcache for the VLRUQ. Note that
1012 * we have to do this after attaching the vnode, because the reference
1013 * count may be held in the vnode itself */
1015 #if defined(AFS_LINUX22_ENV)
1016 /* Hold it for the LRU (should make count 2) */
1018 #elif !(defined (AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV))
1019 VREFCOUNT_SET(tvc, 1); /* us */
1022 #if defined (AFS_FBSD_ENV)
1023 if (tvc->f.states & CVInit)
1025 afs_PostPopulateVCache(tvc, afid, seq);
1028 } /*afs_NewVCache */
1032 afs_NewVCache(struct VenusFid *afid, struct server *serverp)
1034 return afs_NewVCache_int(afid, serverp, 0);
1038 afs_NewBulkVCache(struct VenusFid *afid, struct server *serverp, int seq)
1040 return afs_NewVCache_int(afid, serverp, seq);
1046 * LOCK: afs_FlushActiveVcaches afs_xvcache N
1048 * \param doflocks : Do we handle flocks?
1051 afs_FlushActiveVcaches(afs_int32 doflocks)
1055 struct afs_conn *tc;
1057 afs_ucred_t *cred = NULL;
1058 struct vrequest *treq = NULL;
1059 struct AFSVolSync tsync;
1062 AFS_STATCNT(afs_FlushActiveVcaches);
1064 code = afs_CreateReq(&treq, afs_osi_credp);
1066 afs_warn("unable to alloc treq\n");
1070 ObtainReadLock(&afs_xvcache);
1071 for (i = 0; i < VCSIZE; i++) {
1072 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
1073 if (tvc->f.states & CVInit) continue;
1074 #ifdef AFS_DARWIN80_ENV
1075 if (tvc->f.states & CDeadVnode &&
1076 (tvc->f.states & (CCore|CUnlinkedDel) ||
1077 tvc->flockCount)) panic("Dead vnode has core/unlinkedel/flock");
1079 if (doflocks && tvc->flockCount != 0) {
1080 struct rx_connection *rxconn;
1081 /* if this entry has an flock, send a keep-alive call out */
1083 ReleaseReadLock(&afs_xvcache);
1084 ObtainWriteLock(&tvc->lock, 51);
1086 code = afs_InitReq(treq, afs_osi_credp);
1089 break; /* shutting down: do not try to extend the lock */
1091 treq->flags |= O_NONBLOCK;
1093 tc = afs_Conn(&tvc->f.fid, treq, SHARED_LOCK, &rxconn);
1095 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_EXTENDLOCK);
1098 RXAFS_ExtendLock(rxconn,
1099 (struct AFSFid *)&tvc->f.fid.Fid,
1105 } while (afs_Analyze
1106 (tc, rxconn, code, &tvc->f.fid, treq,
1107 AFS_STATS_FS_RPCIDX_EXTENDLOCK, SHARED_LOCK, NULL));
1109 ReleaseWriteLock(&tvc->lock);
1110 #ifdef AFS_DARWIN80_ENV
1112 ObtainReadLock(&afs_xvcache);
1114 ObtainReadLock(&afs_xvcache);
1119 if ((tvc->f.states & CCore) || (tvc->f.states & CUnlinkedDel)) {
1121 * Don't let it evaporate in case someone else is in
1122 * this code. Also, drop the afs_xvcache lock while
1123 * getting vcache locks.
1126 ReleaseReadLock(&afs_xvcache);
1127 #if defined(AFS_SGI_ENV)
1129 * That's because if we come in via the CUnlinkedDel bit state path we'll be have 0 refcnt
1131 osi_Assert(VREFCOUNT_GT(tvc,0));
1132 AFS_RWLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1134 ObtainWriteLock(&tvc->lock, 52);
1135 if (tvc->f.states & CCore) {
1136 tvc->f.states &= ~CCore;
1137 /* XXXX Find better place-holder for cred XXXX */
1138 cred = (afs_ucred_t *)tvc->linkData;
1139 tvc->linkData = NULL; /* XXX */
1140 code = afs_InitReq(treq, cred);
1141 afs_Trace2(afs_iclSetp, CM_TRACE_ACTCCORE,
1142 ICL_TYPE_POINTER, tvc, ICL_TYPE_INT32,
1143 tvc->execsOrWriters);
1144 if (!code) { /* avoid store when shutting down */
1145 code = afs_StoreOnLastReference(tvc, treq);
1147 ReleaseWriteLock(&tvc->lock);
1148 hzero(tvc->flushDV);
1151 if (code && code != VNOVNODE) {
1152 afs_StoreWarn(code, tvc->f.fid.Fid.Volume,
1153 /* /dev/console */ 1);
1155 } else if (tvc->f.states & CUnlinkedDel) {
1159 ReleaseWriteLock(&tvc->lock);
1160 #if defined(AFS_SGI_ENV)
1161 AFS_RWUNLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1163 afs_remunlink(tvc, 0);
1164 #if defined(AFS_SGI_ENV)
1165 AFS_RWLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1168 /* lost (or won, perhaps) the race condition */
1169 ReleaseWriteLock(&tvc->lock);
1171 #if defined(AFS_SGI_ENV)
1172 AFS_RWUNLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1174 #ifdef AFS_DARWIN80_ENV
1177 AFS_RELE(AFSTOV(tvc));
1178 /* Matches write code setting CCore flag */
1181 ObtainReadLock(&afs_xvcache);
1183 ObtainReadLock(&afs_xvcache);
1186 AFS_RELE(AFSTOV(tvc));
1187 /* Matches write code setting CCore flag */
1194 ReleaseReadLock(&afs_xvcache);
1195 afs_DestroyReq(treq);
1201 * Make sure a cache entry is up-to-date status-wise.
1203 * NOTE: everywhere that calls this can potentially be sped up
1204 * by checking CStatd first, and avoiding doing the InitReq
1205 * if this is up-to-date.
1207 * Anymore, the only places that call this KNOW already that the
1208 * vcache is not up-to-date, so we don't screw around.
1210 * \param avc : Ptr to vcache entry to verify.
1216 * Make sure a cache entry is up-to-date status-wise.
1218 * NOTE: everywhere that calls this can potentially be sped up
1219 * by checking CStatd first, and avoiding doing the InitReq
1220 * if this is up-to-date.
1222 * Anymore, the only places that call this KNOW already that the
1223 * vcache is not up-to-date, so we don't screw around.
1225 * \param avc Pointer to vcache entry to verify.
1228 * \return 0 for success or other error codes.
1231 afs_VerifyVCache2(struct vcache *avc, struct vrequest *areq)
1235 AFS_STATCNT(afs_VerifyVCache);
1237 /* otherwise we must fetch the status info */
1239 ObtainWriteLock(&avc->lock, 53);
1240 if (avc->f.states & CStatd) {
1241 ReleaseWriteLock(&avc->lock);
1244 afs_StaleVCacheFlags(avc, AFS_STALEVC_FILENAME | AFS_STALEVC_CLEARCB,
1246 ReleaseWriteLock(&avc->lock);
1248 /* fetch the status info */
1249 tvc = afs_GetVCache(&avc->f.fid, areq, NULL, avc);
1252 /* Put it back; caller has already incremented vrefCount */
1256 } /*afs_VerifyVCache */
1260 * Simple copy of stat info into cache.
1262 * Callers:as of 1992-04-29, only called by WriteVCache
1264 * \param avc Ptr to vcache entry involved.
1265 * \param astat Ptr to stat info to copy.
1269 afs_SimpleVStat(struct vcache *avc,
1270 struct AFSFetchStatus *astat, struct vrequest *areq)
1273 AFS_STATCNT(afs_SimpleVStat);
1275 #ifdef AFS_64BIT_CLIENT
1276 FillInt64(length, astat->Length_hi, astat->Length);
1277 #else /* AFS_64BIT_CLIENT */
1278 length = astat->Length;
1279 #endif /* AFS_64BIT_CLIENT */
1281 #if defined(AFS_SGI_ENV)
1282 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1283 && !AFS_VN_MAPPED((vnode_t *) avc)) {
1284 osi_Assert((valusema(&avc->vc_rwlock) <= 0)
1285 && (OSI_GET_LOCKID() == avc->vc_rwlockid));
1286 if (length < avc->f.m.Length) {
1287 vnode_t *vp = (vnode_t *) avc;
1289 osi_Assert(WriteLocked(&avc->lock));
1290 ReleaseWriteLock(&avc->lock);
1292 PTOSSVP(vp, (off_t) length, (off_t) MAXLONG);
1294 ObtainWriteLock(&avc->lock, 67);
1299 if (!afs_DirtyPages(avc)) {
1300 /* if actively writing the file, don't fetch over this value */
1301 afs_Trace3(afs_iclSetp, CM_TRACE_SIMPLEVSTAT, ICL_TYPE_POINTER, avc,
1302 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length),
1303 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1304 avc->f.m.Length = length;
1305 avc->f.m.Date = astat->ClientModTime;
1307 avc->f.m.Owner = astat->Owner;
1308 avc->f.m.Group = astat->Group;
1309 avc->f.m.Mode = astat->UnixModeBits;
1310 if (vType(avc) == VREG) {
1311 avc->f.m.Mode |= S_IFREG;
1312 } else if (vType(avc) == VDIR) {
1313 avc->f.m.Mode |= S_IFDIR;
1314 } else if (vType(avc) == VLNK) {
1315 avc->f.m.Mode |= S_IFLNK;
1316 if ((avc->f.m.Mode & 0111) == 0)
1317 avc->mvstat = AFS_MVSTAT_MTPT;
1319 if (avc->f.states & CForeign) {
1320 struct axscache *ac;
1321 avc->f.anyAccess = astat->AnonymousAccess;
1323 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1325 * Caller has at least one bit not covered by anonymous, and
1326 * thus may have interesting rights.
1328 * HOWEVER, this is a really bad idea, because any access query
1329 * for bits which aren't covered by anonymous, on behalf of a user
1330 * who doesn't have any special rights, will result in an answer of
1331 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1332 * It's an especially bad idea under Ultrix, since (due to the lack of
1333 * a proper access() call) it must perform several afs_access() calls
1334 * in order to create magic mode bits that vary according to who makes
1335 * the call. In other words, _every_ stat() generates a test for
1338 #endif /* badidea */
1339 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1340 ac->axess = astat->CallerAccess;
1341 else /* not found, add a new one if possible */
1342 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1345 } /*afs_SimpleVStat */
1349 * Store the status info *only* back to the server for a
1352 * Environment: Must be called with a shared lock held on the vnode.
1354 * \param avc Ptr to the vcache entry.
1355 * \param astatus Ptr to the status info to store.
1356 * \param areq Ptr to the associated vrequest.
1358 * \return Operation status.
1362 afs_WriteVCache(struct vcache *avc,
1363 struct AFSStoreStatus *astatus,
1364 struct vrequest *areq)
1367 struct afs_conn *tc;
1368 struct AFSFetchStatus OutStatus;
1369 struct AFSVolSync tsync;
1370 struct rx_connection *rxconn;
1372 AFS_STATCNT(afs_WriteVCache);
1373 afs_Trace2(afs_iclSetp, CM_TRACE_WVCACHE, ICL_TYPE_POINTER, avc,
1374 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length));
1376 tc = afs_Conn(&avc->f.fid, areq, SHARED_LOCK, &rxconn);
1378 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STORESTATUS);
1381 RXAFS_StoreStatus(rxconn, (struct AFSFid *)&avc->f.fid.Fid,
1382 astatus, &OutStatus, &tsync);
1387 } while (afs_Analyze
1388 (tc, rxconn, code, &avc->f.fid, areq, AFS_STATS_FS_RPCIDX_STORESTATUS,
1389 SHARED_LOCK, NULL));
1391 UpgradeSToWLock(&avc->lock, 20);
1393 /* success, do the changes locally */
1394 afs_SimpleVStat(avc, &OutStatus, areq);
1396 * Update the date, too. SimpleVStat didn't do this, since
1397 * it thought we were doing this after fetching new status
1398 * over a file being written.
1400 avc->f.m.Date = OutStatus.ClientModTime;
1402 /* failure, set up to check with server next time */
1403 afs_StaleVCacheFlags(avc, 0, CUnique);
1405 ConvertWToSLock(&avc->lock);
1408 } /*afs_WriteVCache */
1411 * Store status info only locally, set the proper disconnection flags
1412 * and add to dirty list.
1414 * \param avc The vcache to be written locally.
1415 * \param astatus Get attr fields from local store.
1416 * \param attrs This one is only of the vs_size.
1418 * \note Must be called with a shared lock on the vnode
1421 afs_WriteVCacheDiscon(struct vcache *avc,
1422 struct AFSStoreStatus *astatus,
1423 struct vattr *attrs)
1426 afs_int32 flags = 0;
1428 UpgradeSToWLock(&avc->lock, 700);
1430 if (!astatus->Mask) {
1436 /* Set attributes. */
1437 if (astatus->Mask & AFS_SETMODTIME) {
1438 avc->f.m.Date = astatus->ClientModTime;
1439 flags |= VDisconSetTime;
1442 if (astatus->Mask & AFS_SETOWNER) {
1443 /* printf("Not allowed yet. \n"); */
1444 /*avc->f.m.Owner = astatus->Owner;*/
1447 if (astatus->Mask & AFS_SETGROUP) {
1448 /* printf("Not allowed yet. \n"); */
1449 /*avc->f.m.Group = astatus->Group;*/
1452 if (astatus->Mask & AFS_SETMODE) {
1453 avc->f.m.Mode = astatus->UnixModeBits;
1455 #if 0 /* XXX: Leaving this out, so it doesn't mess up the file type flag.*/
1457 if (vType(avc) == VREG) {
1458 avc->f.m.Mode |= S_IFREG;
1459 } else if (vType(avc) == VDIR) {
1460 avc->f.m.Mode |= S_IFDIR;
1461 } else if (vType(avc) == VLNK) {
1462 avc->f.m.Mode |= S_IFLNK;
1463 if ((avc->f.m.Mode & 0111) == 0)
1464 avc->mvstat = AFS_MVSTAT_MTPT;
1467 flags |= VDisconSetMode;
1468 } /* if(astatus.Mask & AFS_SETMODE) */
1470 } /* if (!astatus->Mask) */
1472 if (attrs->va_size > 0) {
1473 /* XXX: Do I need more checks? */
1474 /* Truncation operation. */
1475 flags |= VDisconTrunc;
1479 afs_DisconAddDirty(avc, flags, 1);
1481 /* XXX: How about the rest of the fields? */
1483 ConvertWToSLock(&avc->lock);
1489 * Copy astat block into vcache info
1491 * \note This code may get dataversion and length out of sync if the file has
1492 * been modified. This is less than ideal. I haven't thought about it sufficiently
1493 * to be certain that it is adequate.
1495 * \note Environment: Must be called under a write lock
1497 * \param avc Ptr to vcache entry.
1498 * \param astat Ptr to stat block to copy in.
1499 * \param areq Ptr to associated request.
1502 afs_ProcessFS(struct vcache *avc,
1503 struct AFSFetchStatus *astat, struct vrequest *areq)
1507 AFS_STATCNT(afs_ProcessFS);
1509 #ifdef AFS_64BIT_CLIENT
1510 FillInt64(length, astat->Length_hi, astat->Length);
1511 #else /* AFS_64BIT_CLIENT */
1512 length = astat->Length;
1513 #endif /* AFS_64BIT_CLIENT */
1514 /* WARNING: afs_DoBulkStat uses the Length field to store a sequence
1515 * number for each bulk status request. Under no circumstances
1516 * should afs_DoBulkStat store a sequence number if the new
1517 * length will be ignored when afs_ProcessFS is called with
1518 * new stats. If you change the following conditional then you
1519 * also need to change the conditional in afs_DoBulkStat. */
1521 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1522 && !AFS_VN_MAPPED((vnode_t *) avc)) {
1524 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)) {
1526 /* if we're writing or mapping this file, don't fetch over these
1529 afs_Trace3(afs_iclSetp, CM_TRACE_PROCESSFS, ICL_TYPE_POINTER, avc,
1530 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length),
1531 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1532 avc->f.m.Length = length;
1533 avc->f.m.Date = astat->ClientModTime;
1535 hset64(newDV, astat->dataVersionHigh, astat->DataVersion);
1536 afs_SetDataVersion(avc, &newDV);
1537 avc->f.m.Owner = astat->Owner;
1538 avc->f.m.Mode = astat->UnixModeBits;
1539 avc->f.m.Group = astat->Group;
1540 avc->f.m.LinkCount = astat->LinkCount;
1541 if (astat->FileType == File) {
1542 vSetType(avc, VREG);
1543 avc->f.m.Mode |= S_IFREG;
1544 } else if (astat->FileType == Directory) {
1545 vSetType(avc, VDIR);
1546 avc->f.m.Mode |= S_IFDIR;
1547 } else if (astat->FileType == SymbolicLink) {
1548 if (afs_fakestat_enable && (avc->f.m.Mode & 0111) == 0) {
1549 vSetType(avc, VDIR);
1550 avc->f.m.Mode |= S_IFDIR;
1552 vSetType(avc, VLNK);
1553 avc->f.m.Mode |= S_IFLNK;
1555 if ((avc->f.m.Mode & 0111) == 0) {
1556 avc->mvstat = AFS_MVSTAT_MTPT;
1559 avc->f.anyAccess = astat->AnonymousAccess;
1561 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1563 * Caller has at least one bit not covered by anonymous, and
1564 * thus may have interesting rights.
1566 * HOWEVER, this is a really bad idea, because any access query
1567 * for bits which aren't covered by anonymous, on behalf of a user
1568 * who doesn't have any special rights, will result in an answer of
1569 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1570 * It's an especially bad idea under Ultrix, since (due to the lack of
1571 * a proper access() call) it must perform several afs_access() calls
1572 * in order to create magic mode bits that vary according to who makes
1573 * the call. In other words, _every_ stat() generates a test for
1576 #endif /* badidea */
1578 struct axscache *ac;
1579 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1580 ac->axess = astat->CallerAccess;
1581 else /* not found, add a new one if possible */
1582 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1584 } /*afs_ProcessFS */
1588 * Get fid from server.
1591 * \param areq Request to be passed on.
1592 * \param name Name of ?? to lookup.
1593 * \param OutStatus Fetch status.
1598 * \return Success status of operation.
1601 afs_RemoteLookup(struct VenusFid *afid, struct vrequest *areq,
1602 char *name, struct VenusFid *nfid,
1603 struct AFSFetchStatus *OutStatusp,
1604 struct AFSCallBack *CallBackp, struct server **serverp,
1605 struct AFSVolSync *tsyncp)
1608 struct afs_conn *tc;
1609 struct rx_connection *rxconn;
1610 struct AFSFetchStatus OutDirStatus;
1613 name = ""; /* XXX */
1615 tc = afs_Conn(afid, areq, SHARED_LOCK, &rxconn);
1618 *serverp = tc->parent->srvr->server;
1619 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_XLOOKUP);
1622 RXAFS_Lookup(rxconn, (struct AFSFid *)&afid->Fid, name,
1623 (struct AFSFid *)&nfid->Fid, OutStatusp,
1624 &OutDirStatus, CallBackp, tsyncp);
1629 } while (afs_Analyze
1630 (tc, rxconn, code, afid, areq, AFS_STATS_FS_RPCIDX_XLOOKUP, SHARED_LOCK,
1640 * Given a file id and a vrequest structure, fetch the status
1641 * information associated with the file.
1643 * \param afid File ID.
1644 * \param areq Ptr to associated vrequest structure, specifying the
1645 * user whose authentication tokens will be used.
1646 * \param avc Caller may already have a vcache for this file, which is
1649 * \note Environment:
1650 * The cache entry is returned with an increased vrefCount field.
1651 * The entry must be discarded by calling afs_PutVCache when you
1652 * are through using the pointer to the cache entry.
1654 * You should not hold any locks when calling this function, except
1655 * locks on other vcache entries. If you lock more than one vcache
1656 * entry simultaneously, you should lock them in this order:
1658 * 1. Lock all files first, then directories.
1659 * 2. Within a particular type, lock entries in Fid.Vnode order.
1661 * This locking hierarchy is convenient because it allows locking
1662 * of a parent dir cache entry, given a file (to check its access
1663 * control list). It also allows renames to be handled easily by
1664 * locking directories in a constant order.
1666 * \note NB. NewVCache -> FlushVCache presently (4/10/95) drops the xvcache lock.
1668 * \note Might have a vcache structure already, which must
1669 * already be held by the caller
1672 afs_GetVCache(struct VenusFid *afid, struct vrequest *areq,
1673 afs_int32 * cached, struct vcache *avc)
1676 afs_int32 code, newvcache = 0;
1681 AFS_STATCNT(afs_GetVCache);
1684 *cached = 0; /* Init just in case */
1686 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1690 ObtainSharedLock(&afs_xvcache, 5);
1692 tvc = afs_FindVCache(afid, &retry, DO_STATS | DO_VLRU | IS_SLOCK);
1694 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1695 ReleaseSharedLock(&afs_xvcache);
1696 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1703 osi_Assert((tvc->f.states & CVInit) == 0);
1704 /* If we are in readdir, return the vnode even if not statd */
1705 if ((tvc->f.states & CStatd) || afs_InReadDir(tvc)) {
1706 ReleaseSharedLock(&afs_xvcache);
1710 UpgradeSToWLock(&afs_xvcache, 21);
1712 /* no cache entry, better grab one */
1713 tvc = afs_NewVCache(afid, NULL);
1716 ConvertWToSLock(&afs_xvcache);
1719 ReleaseSharedLock(&afs_xvcache);
1723 afs_stats_cmperf.vcacheMisses++;
1726 ReleaseSharedLock(&afs_xvcache);
1728 ObtainWriteLock(&tvc->lock, 54);
1730 if (tvc->f.states & CStatd) {
1731 ReleaseWriteLock(&tvc->lock);
1734 #ifdef AFS_DARWIN80_ENV
1735 /* Darwin 8.0 only has bufs in nfs, so we shouldn't have to worry about them.
1738 #if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
1740 * XXX - I really don't like this. Should try to understand better.
1741 * It seems that sometimes, when we get called, we already hold the
1742 * lock on the vnode (e.g., from afs_getattr via afs_VerifyVCache).
1743 * We can't drop the vnode lock, because that could result in a race.
1744 * Sometimes, though, we get here and don't hold the vnode lock.
1745 * I hate code paths that sometimes hold locks and sometimes don't.
1746 * In any event, the dodge we use here is to check whether the vnode
1747 * is locked, and if it isn't, then we gain and drop it around the call
1748 * to vinvalbuf; otherwise, we leave it alone.
1751 struct vnode *vp = AFSTOV(tvc);
1754 #if defined(AFS_DARWIN_ENV)
1755 iheldthelock = VOP_ISLOCKED(vp);
1757 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, current_proc());
1758 /* this is messy. we can call fsync which will try to reobtain this */
1759 if (VTOAFS(vp) == tvc)
1760 ReleaseWriteLock(&tvc->lock);
1761 if (UBCINFOEXISTS(vp)) {
1762 vinvalbuf(vp, V_SAVE, &afs_osi_cred, current_proc(), PINOD, 0);
1764 if (VTOAFS(vp) == tvc)
1765 ObtainWriteLock(&tvc->lock, 954);
1767 VOP_UNLOCK(vp, LK_EXCLUSIVE, current_proc());
1768 #elif defined(AFS_FBSD80_ENV)
1769 iheldthelock = VOP_ISLOCKED(vp);
1770 if (!iheldthelock) {
1771 /* nosleep/sleep lock order reversal */
1772 int glocked = ISAFS_GLOCK();
1775 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
1779 vinvalbuf(vp, V_SAVE, PINOD, 0); /* changed late in 8.0-CURRENT */
1782 #elif defined(AFS_FBSD60_ENV)
1783 iheldthelock = VOP_ISLOCKED(vp, curthread);
1785 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread);
1787 vinvalbuf(vp, V_SAVE, curthread, PINOD, 0);
1790 VOP_UNLOCK(vp, LK_EXCLUSIVE, curthread);
1791 #elif defined(AFS_FBSD_ENV)
1792 iheldthelock = VOP_ISLOCKED(vp, curthread);
1794 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread);
1795 vinvalbuf(vp, V_SAVE, osi_curcred(), curthread, PINOD, 0);
1797 VOP_UNLOCK(vp, LK_EXCLUSIVE, curthread);
1798 #elif defined(AFS_OBSD_ENV)
1799 iheldthelock = VOP_ISLOCKED(vp, curproc);
1801 VOP_LOCK(vp, LK_EXCLUSIVE | LK_RETRY, curproc);
1802 uvm_vnp_uncache(vp);
1804 VOP_UNLOCK(vp, 0, curproc);
1805 #elif defined(AFS_NBSD40_ENV)
1806 iheldthelock = VOP_ISLOCKED(vp);
1807 if (!iheldthelock) {
1808 VOP_LOCK(vp, LK_EXCLUSIVE | LK_RETRY);
1810 uvm_vnp_uncache(vp);
1818 afs_StaleVCacheFlags(tvc, AFS_STALEVC_NODNLC | AFS_STALEVC_CLEARCB,
1821 /* It is always appropriate to throw away all the access rights? */
1822 afs_FreeAllAxs(&(tvc->Access));
1823 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-volume info */
1825 if ((tvp->states & VForeign)) {
1827 tvc->f.states |= CForeign;
1828 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
1829 && (tvp->rootUnique == afid->Fid.Unique)) {
1830 tvc->mvstat = AFS_MVSTAT_ROOT;
1833 if (tvp->states & VRO)
1834 tvc->f.states |= CRO;
1835 if (tvp->states & VBackup)
1836 tvc->f.states |= CBackup;
1837 /* now copy ".." entry back out of volume structure, if necessary */
1838 if (tvc->mvstat == AFS_MVSTAT_ROOT && tvp->dotdot.Fid.Volume != 0) {
1839 if (!tvc->mvid.parent)
1840 tvc->mvid.parent = (struct VenusFid *)
1841 osi_AllocSmallSpace(sizeof(struct VenusFid));
1842 *tvc->mvid.parent = tvp->dotdot;
1844 afs_PutVolume(tvp, READ_LOCK);
1848 afs_RemoveVCB(afid);
1850 struct AFSFetchStatus OutStatus;
1852 if (afs_DynrootNewVnode(tvc, &OutStatus)) {
1853 afs_ProcessFS(tvc, &OutStatus, areq);
1854 tvc->f.states |= CStatd | CUnique;
1855 tvc->f.parent.vnode = OutStatus.ParentVnode;
1856 tvc->f.parent.unique = OutStatus.ParentUnique;
1860 if (AFS_IS_DISCONNECTED) {
1861 /* Nothing to do otherwise...*/
1863 /* printf("Network is down in afs_GetCache"); */
1865 code = afs_FetchStatus(tvc, afid, areq, &OutStatus);
1867 /* For the NFS translator's benefit, make sure
1868 * non-directory vnodes always have their parent FID set
1869 * correctly, even when created as a result of decoding an
1870 * NFS filehandle. It would be nice to also do this for
1871 * directories, but we can't because the fileserver fills
1872 * in the FID of the directory itself instead of that of
1875 if (!code && OutStatus.FileType != Directory &&
1876 !tvc->f.parent.vnode) {
1877 tvc->f.parent.vnode = OutStatus.ParentVnode;
1878 tvc->f.parent.unique = OutStatus.ParentUnique;
1879 /* XXX - SXW - It's conceivable we should mark ourselves
1880 * as dirty again here, incase we've been raced
1881 * out of the FetchStatus call.
1888 ReleaseWriteLock(&tvc->lock);
1894 ReleaseWriteLock(&tvc->lock);
1897 } /*afs_GetVCache */
1902 * Lookup a vcache by fid. Look inside the cache first, if not
1903 * there, lookup the file on the server, and then get it's fresh
1908 * \param cached Is element cached? If NULL, don't answer.
1912 * \return The found element or NULL.
1915 afs_LookupVCache(struct VenusFid *afid, struct vrequest *areq,
1916 afs_int32 * cached, struct vcache *adp, char *aname)
1918 afs_int32 code, now, newvcache = 0;
1919 struct VenusFid nfid;
1922 struct AFSFetchStatus OutStatus;
1923 struct AFSCallBack CallBack;
1924 struct AFSVolSync tsync;
1925 struct server *serverp = 0;
1929 AFS_STATCNT(afs_GetVCache);
1931 *cached = 0; /* Init just in case */
1933 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1937 ObtainReadLock(&afs_xvcache);
1938 tvc = afs_FindVCache(afid, &retry, DO_STATS /* no vlru */ );
1941 ReleaseReadLock(&afs_xvcache);
1943 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1944 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1948 ObtainReadLock(&tvc->lock);
1950 if (tvc->f.states & CStatd) {
1954 ReleaseReadLock(&tvc->lock);
1957 tvc->f.states &= ~CUnique;
1959 ReleaseReadLock(&tvc->lock);
1961 ObtainReadLock(&afs_xvcache);
1964 ReleaseReadLock(&afs_xvcache);
1966 /* lookup the file */
1969 origCBs = afs_allCBs; /* if anything changes, we don't have a cb */
1971 if (AFS_IS_DISCONNECTED) {
1972 /* printf("Network is down in afs_LookupVcache\n"); */
1976 afs_RemoteLookup(&adp->f.fid, areq, aname, &nfid, &OutStatus,
1977 &CallBack, &serverp, &tsync);
1979 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1983 ObtainSharedLock(&afs_xvcache, 6);
1984 tvc = afs_FindVCache(&nfid, &retry, DO_VLRU | IS_SLOCK/* no xstats now */ );
1986 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1987 ReleaseSharedLock(&afs_xvcache);
1988 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1994 /* no cache entry, better grab one */
1995 UpgradeSToWLock(&afs_xvcache, 22);
1996 tvc = afs_NewVCache(&nfid, serverp);
1998 ConvertWToSLock(&afs_xvcache);
2001 ReleaseSharedLock(&afs_xvcache);
2006 ReleaseSharedLock(&afs_xvcache);
2007 ObtainWriteLock(&tvc->lock, 55);
2009 /* It is always appropriate to throw away all the access rights? */
2010 afs_FreeAllAxs(&(tvc->Access));
2011 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-vol info */
2013 if ((tvp->states & VForeign)) {
2015 tvc->f.states |= CForeign;
2016 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
2017 && (tvp->rootUnique == afid->Fid.Unique))
2018 tvc->mvstat = AFS_MVSTAT_ROOT;
2020 if (tvp->states & VRO)
2021 tvc->f.states |= CRO;
2022 if (tvp->states & VBackup)
2023 tvc->f.states |= CBackup;
2024 /* now copy ".." entry back out of volume structure, if necessary */
2025 if (tvc->mvstat == AFS_MVSTAT_ROOT && tvp->dotdot.Fid.Volume != 0) {
2026 if (!tvc->mvid.parent)
2027 tvc->mvid.parent = (struct VenusFid *)
2028 osi_AllocSmallSpace(sizeof(struct VenusFid));
2029 *tvc->mvid.parent = tvp->dotdot;
2034 afs_StaleVCacheFlags(tvc, 0, CUnique);
2036 afs_PutVolume(tvp, READ_LOCK);
2037 ReleaseWriteLock(&tvc->lock);
2042 ObtainWriteLock(&afs_xcbhash, 466);
2043 if (origCBs == afs_allCBs) {
2044 if (CallBack.ExpirationTime) {
2045 tvc->callback = serverp;
2046 tvc->cbExpires = CallBack.ExpirationTime + now;
2047 tvc->f.states |= CStatd | CUnique;
2048 tvc->f.states &= ~CBulkFetching;
2049 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvp);
2050 } else if (tvc->f.states & CRO) {
2051 /* adapt gives us an hour. */
2052 tvc->cbExpires = 3600 + osi_Time();
2053 /*XXX*/ tvc->f.states |= CStatd | CUnique;
2054 tvc->f.states &= ~CBulkFetching;
2055 afs_QueueCallback(tvc, CBHash(3600), tvp);
2057 afs_StaleVCacheFlags(tvc,
2058 AFS_STALEVC_CBLOCKED | AFS_STALEVC_CLEARCB,
2062 afs_StaleVCacheFlags(tvc,
2063 AFS_STALEVC_CBLOCKED | AFS_STALEVC_CLEARCB,
2066 ReleaseWriteLock(&afs_xcbhash);
2068 afs_PutVolume(tvp, READ_LOCK);
2069 afs_ProcessFS(tvc, &OutStatus, areq);
2071 ReleaseWriteLock(&tvc->lock);
2077 afs_GetRootVCache(struct VenusFid *afid, struct vrequest *areq,
2078 afs_int32 * cached, struct volume *tvolp)
2080 afs_int32 code = 0, i, newvcache = 0, haveStatus = 0;
2081 afs_int32 getNewFid = 0;
2083 struct VenusFid nfid;
2085 struct server *serverp = 0;
2086 struct AFSFetchStatus OutStatus;
2087 struct AFSCallBack CallBack;
2088 struct AFSVolSync tsync;
2090 #ifdef AFS_DARWIN80_ENV
2097 if (!tvolp->rootVnode || getNewFid) {
2098 struct VenusFid tfid;
2101 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
2102 origCBs = afs_allCBs; /* ignore InitCallBackState */
2104 afs_RemoteLookup(&tfid, areq, NULL, &nfid, &OutStatus, &CallBack,
2109 /* ReleaseReadLock(&tvolp->lock); */
2110 ObtainWriteLock(&tvolp->lock, 56);
2111 tvolp->rootVnode = afid->Fid.Vnode = nfid.Fid.Vnode;
2112 tvolp->rootUnique = afid->Fid.Unique = nfid.Fid.Unique;
2113 ReleaseWriteLock(&tvolp->lock);
2114 /* ObtainReadLock(&tvolp->lock);*/
2117 afid->Fid.Vnode = tvolp->rootVnode;
2118 afid->Fid.Unique = tvolp->rootUnique;
2122 ObtainSharedLock(&afs_xvcache, 7);
2124 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2125 if (!FidCmp(&(tvc->f.fid), afid)) {
2126 if (tvc->f.states & CVInit) {
2127 ReleaseSharedLock(&afs_xvcache);
2128 afs_osi_Sleep(&tvc->f.states);
2131 #ifdef AFS_DARWIN80_ENV
2132 if (tvc->f.states & CDeadVnode) {
2133 ReleaseSharedLock(&afs_xvcache);
2134 afs_osi_Sleep(&tvc->f.states);
2138 if (vnode_get(tvp)) /* this bumps ref count */
2140 if (vnode_ref(tvp)) {
2142 /* AFSTOV(tvc) may be NULL */
2152 if (!haveStatus && (!tvc || !(tvc->f.states & CStatd))) {
2153 /* Mount point no longer stat'd or unknown. FID may have changed. */
2155 ReleaseSharedLock(&afs_xvcache);
2156 #ifdef AFS_DARWIN80_ENV
2159 vnode_put(AFSTOV(tvc));
2160 vnode_rele(AFSTOV(tvc));
2169 UpgradeSToWLock(&afs_xvcache, 23);
2170 /* no cache entry, better grab one */
2171 tvc = afs_NewVCache(afid, NULL);
2174 ReleaseWriteLock(&afs_xvcache);
2178 afs_stats_cmperf.vcacheMisses++;
2182 afs_stats_cmperf.vcacheHits++;
2183 #if defined(AFS_DARWIN80_ENV)
2184 /* we already bumped the ref count in the for loop above */
2185 #else /* AFS_DARWIN80_ENV */
2188 UpgradeSToWLock(&afs_xvcache, 24);
2189 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2190 refpanic("GRVC VLRU inconsistent0");
2192 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2193 refpanic("GRVC VLRU inconsistent1");
2195 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2196 refpanic("GRVC VLRU inconsistent2");
2198 QRemove(&tvc->vlruq); /* move to lruq head */
2199 QAdd(&VLRU, &tvc->vlruq);
2200 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2201 refpanic("GRVC VLRU inconsistent3");
2203 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2204 refpanic("GRVC VLRU inconsistent4");
2206 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2207 refpanic("GRVC VLRU inconsistent5");
2212 ReleaseWriteLock(&afs_xvcache);
2214 if (tvc->f.states & CStatd) {
2218 ObtainReadLock(&tvc->lock);
2219 tvc->f.states &= ~CUnique;
2220 tvc->callback = NULL; /* redundant, perhaps */
2221 ReleaseReadLock(&tvc->lock);
2224 ObtainWriteLock(&tvc->lock, 57);
2226 /* It is always appropriate to throw away all the access rights? */
2227 afs_FreeAllAxs(&(tvc->Access));
2230 tvc->f.states |= CForeign;
2231 if (tvolp->states & VRO)
2232 tvc->f.states |= CRO;
2233 if (tvolp->states & VBackup)
2234 tvc->f.states |= CBackup;
2235 /* now copy ".." entry back out of volume structure, if necessary */
2236 if (newvcache && (tvolp->rootVnode == afid->Fid.Vnode)
2237 && (tvolp->rootUnique == afid->Fid.Unique)) {
2238 tvc->mvstat = AFS_MVSTAT_ROOT;
2240 if (tvc->mvstat == AFS_MVSTAT_ROOT && tvolp->dotdot.Fid.Volume != 0) {
2241 if (!tvc->mvid.parent)
2242 tvc->mvid.parent = (struct VenusFid *)
2243 osi_AllocSmallSpace(sizeof(struct VenusFid));
2244 *tvc->mvid.parent = tvolp->dotdot;
2248 afs_RemoveVCB(afid);
2251 struct VenusFid tfid;
2254 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
2255 origCBs = afs_allCBs; /* ignore InitCallBackState */
2257 afs_RemoteLookup(&tfid, areq, NULL, &nfid, &OutStatus, &CallBack,
2262 afs_StaleVCacheFlags(tvc, AFS_STALEVC_CLEARCB, CUnique);
2263 ReleaseWriteLock(&tvc->lock);
2268 ObtainWriteLock(&afs_xcbhash, 468);
2269 if (origCBs == afs_allCBs) {
2270 tvc->f.states |= CTruth;
2271 tvc->callback = serverp;
2272 if (CallBack.ExpirationTime != 0) {
2273 tvc->cbExpires = CallBack.ExpirationTime + start;
2274 tvc->f.states |= CStatd;
2275 tvc->f.states &= ~CBulkFetching;
2276 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvolp);
2277 } else if (tvc->f.states & CRO) {
2278 /* adapt gives us an hour. */
2279 tvc->cbExpires = 3600 + osi_Time();
2280 /*XXX*/ tvc->f.states |= CStatd;
2281 tvc->f.states &= ~CBulkFetching;
2282 afs_QueueCallback(tvc, CBHash(3600), tvolp);
2285 afs_StaleVCacheFlags(tvc, AFS_STALEVC_CBLOCKED | AFS_STALEVC_CLEARCB,
2288 ReleaseWriteLock(&afs_xcbhash);
2289 afs_ProcessFS(tvc, &OutStatus, areq);
2291 ReleaseWriteLock(&tvc->lock);
2297 * Update callback status and (sometimes) attributes of a vnode.
2298 * Called after doing a fetch status RPC. Whilst disconnected, attributes
2299 * shouldn't be written to the vcache here.
2304 * \param Outsp Server status after rpc call.
2305 * \param acb Callback for this vnode.
2307 * \note The vcache must be write locked.
2310 afs_UpdateStatus(struct vcache *avc, struct VenusFid *afid,
2311 struct vrequest *areq, struct AFSFetchStatus *Outsp,
2312 struct AFSCallBack *acb, afs_uint32 start)
2314 struct volume *volp;
2317 /* Dont write status in vcache if resyncing after a disconnection. */
2318 afs_ProcessFS(avc, Outsp, areq);
2320 volp = afs_GetVolume(afid, areq, READ_LOCK);
2321 ObtainWriteLock(&afs_xcbhash, 469);
2322 avc->f.states |= CTruth;
2323 if (avc->callback /* check for race */ ) {
2324 if (acb->ExpirationTime != 0) {
2325 avc->cbExpires = acb->ExpirationTime + start;
2326 avc->f.states |= CStatd;
2327 avc->f.states &= ~CBulkFetching;
2328 afs_QueueCallback(avc, CBHash(acb->ExpirationTime), volp);
2329 } else if (avc->f.states & CRO) {
2330 /* ordinary callback on a read-only volume -- AFS 3.2 style */
2331 avc->cbExpires = 3600 + start;
2332 avc->f.states |= CStatd;
2333 avc->f.states &= ~CBulkFetching;
2334 afs_QueueCallback(avc, CBHash(3600), volp);
2336 afs_StaleVCacheFlags(avc,
2337 AFS_STALEVC_CBLOCKED | AFS_STALEVC_CLEARCB,
2341 afs_StaleVCacheFlags(avc, AFS_STALEVC_CBLOCKED | AFS_STALEVC_CLEARCB,
2344 ReleaseWriteLock(&afs_xcbhash);
2346 afs_PutVolume(volp, READ_LOCK);
2350 afs_BadFetchStatus(struct afs_conn *tc)
2352 int addr = ntohl(tc->parent->srvr->sa_ip);
2353 afs_warn("afs: Invalid AFSFetchStatus from server %u.%u.%u.%u\n",
2354 (addr >> 24) & 0xff, (addr >> 16) & 0xff, (addr >> 8) & 0xff,
2356 afs_warn("afs: This suggests the server may be sending bad data that "
2357 "can lead to availability issues or data corruption. The "
2358 "issue has been avoided for now, but it may not always be "
2359 "detectable. Please upgrade the server if possible.\n");
2363 * Check if a given AFSFetchStatus structure is sane.
2365 * @param[in] tc The server from which we received the status
2366 * @param[in] status The status we received
2368 * @return whether the given structure is valid or not
2369 * @retval 0 the structure is fine
2370 * @retval nonzero the structure looks like garbage; act as if we received
2371 * the returned error code from the server
2374 afs_CheckFetchStatus(struct afs_conn *tc, struct AFSFetchStatus *status)
2376 if (status->errorCode ||
2377 status->InterfaceVersion != 1 ||
2378 !(status->FileType > Invalid && status->FileType <= SymbolicLink) ||
2379 status->ParentVnode == 0 || status->ParentUnique == 0) {
2381 afs_warn("afs: FetchStatus ec %u iv %u ft %u pv %u pu %u\n",
2382 (unsigned)status->errorCode, (unsigned)status->InterfaceVersion,
2383 (unsigned)status->FileType, (unsigned)status->ParentVnode,
2384 (unsigned)status->ParentUnique);
2385 afs_BadFetchStatus(tc);
2393 * Must be called with avc write-locked
2394 * don't absolutely have to invalidate the hint unless the dv has
2395 * changed, but be sure to get it right else there will be consistency bugs.
2398 afs_FetchStatus(struct vcache * avc, struct VenusFid * afid,
2399 struct vrequest * areq, struct AFSFetchStatus * Outsp)
2402 afs_uint32 start = 0;
2403 struct afs_conn *tc;
2404 struct AFSCallBack CallBack;
2405 struct AFSVolSync tsync;
2406 struct rx_connection *rxconn;
2409 tc = afs_Conn(afid, areq, SHARED_LOCK, &rxconn);
2410 avc->dchint = NULL; /* invalidate hints */
2412 avc->callback = tc->parent->srvr->server;
2414 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_FETCHSTATUS);
2417 RXAFS_FetchStatus(rxconn, (struct AFSFid *)&afid->Fid, Outsp,
2424 code = afs_CheckFetchStatus(tc, Outsp);
2429 } while (afs_Analyze
2430 (tc, rxconn, code, afid, areq, AFS_STATS_FS_RPCIDX_FETCHSTATUS,
2431 SHARED_LOCK, NULL));
2434 afs_UpdateStatus(avc, afid, areq, Outsp, &CallBack, start);
2436 /* used to undo the local callback, but that's too extreme.
2437 * There are plenty of good reasons that fetchstatus might return
2438 * an error, such as EPERM. If we have the vnode cached, statd,
2439 * with callback, might as well keep track of the fact that we
2440 * don't have access...
2442 if (code == EPERM || code == EACCES) {
2443 struct axscache *ac;
2444 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
2446 else /* not found, add a new one if possible */
2447 afs_AddAxs(avc->Access, areq->uid, 0);
2458 * Stuff some information into the vcache for the given file.
2461 * afid : File in question.
2462 * OutStatus : Fetch status on the file.
2463 * CallBack : Callback info.
2464 * tc : RPC connection involved.
2465 * areq : vrequest involved.
2468 * Nothing interesting.
2471 afs_StuffVcache(struct VenusFid *afid,
2472 struct AFSFetchStatus *OutStatus,
2473 struct AFSCallBack *CallBack, struct afs_conn *tc,
2474 struct vrequest *areq)
2476 afs_int32 code, i, newvcache = 0;
2478 struct AFSVolSync tsync;
2480 struct axscache *ac;
2483 AFS_STATCNT(afs_StuffVcache);
2484 #ifdef IFS_VCACHECOUNT
2489 ObtainSharedLock(&afs_xvcache, 8);
2491 tvc = afs_FindVCache(afid, &retry, DO_VLRU| IS_SLOCK /* no stats */ );
2493 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2494 ReleaseSharedLock(&afs_xvcache);
2495 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2501 /* no cache entry, better grab one */
2502 UpgradeSToWLock(&afs_xvcache, 25);
2503 tvc = afs_NewVCache(afid, NULL);
2505 ConvertWToSLock(&afs_xvcache);
2508 ReleaseSharedLock(&afs_xvcache);
2513 ReleaseSharedLock(&afs_xvcache);
2514 ObtainWriteLock(&tvc->lock, 58);
2516 afs_StaleVCacheFlags(tvc, AFS_STALEVC_NOCB, 0);
2518 /* Is it always appropriate to throw away all the access rights? */
2519 afs_FreeAllAxs(&(tvc->Access));
2521 /*Copy useful per-volume info */
2522 tvp = afs_GetVolume(afid, areq, READ_LOCK);
2524 if (newvcache && (tvp->states & VForeign))
2525 tvc->f.states |= CForeign;
2526 if (tvp->states & VRO)
2527 tvc->f.states |= CRO;
2528 if (tvp->states & VBackup)
2529 tvc->f.states |= CBackup;
2531 * Now, copy ".." entry back out of volume structure, if
2534 if (tvc->mvstat == AFS_MVSTAT_ROOT && tvp->dotdot.Fid.Volume != 0) {
2535 if (!tvc->mvid.parent)
2536 tvc->mvid.parent = (struct VenusFid *)
2537 osi_AllocSmallSpace(sizeof(struct VenusFid));
2538 *tvc->mvid.parent = tvp->dotdot;
2541 /* store the stat on the file */
2542 afs_RemoveVCB(afid);
2543 afs_ProcessFS(tvc, OutStatus, areq);
2544 tvc->callback = tc->srvr->server;
2546 /* we use osi_Time twice below. Ideally, we would use the time at which
2547 * the FetchStatus call began, instead, but we don't have it here. So we
2548 * make do with "now". In the CRO case, it doesn't really matter. In
2549 * the other case, we hope that the difference between "now" and when the
2550 * call actually began execution on the server won't be larger than the
2551 * padding which the server keeps. Subtract 1 second anyway, to be on
2552 * the safe side. Can't subtract more because we don't know how big
2553 * ExpirationTime is. Possible consistency problems may arise if the call
2554 * timeout period becomes longer than the server's expiration padding. */
2555 ObtainWriteLock(&afs_xcbhash, 470);
2556 if (CallBack->ExpirationTime != 0) {
2557 tvc->cbExpires = CallBack->ExpirationTime + osi_Time() - 1;
2558 tvc->f.states |= CStatd;
2559 tvc->f.states &= ~CBulkFetching;
2560 afs_QueueCallback(tvc, CBHash(CallBack->ExpirationTime), tvp);
2561 } else if (tvc->f.states & CRO) {
2562 /* old-fashioned AFS 3.2 style */
2563 tvc->cbExpires = 3600 + osi_Time();
2564 /*XXX*/ tvc->f.states |= CStatd;
2565 tvc->f.states &= ~CBulkFetching;
2566 afs_QueueCallback(tvc, CBHash(3600), tvp);
2568 afs_StaleVCacheFlags(tvc, AFS_STALEVC_CBLOCKED | AFS_STALEVC_CLEARCB,
2571 ReleaseWriteLock(&afs_xcbhash);
2573 afs_PutVolume(tvp, READ_LOCK);
2575 /* look in per-pag cache */
2576 if (tvc->Access && (ac = afs_FindAxs(tvc->Access, areq->uid)))
2577 ac->axess = OutStatus->CallerAccess; /* substitute pags */
2578 else /* not found, add a new one if possible */
2579 afs_AddAxs(tvc->Access, areq->uid, OutStatus->CallerAccess);
2581 ReleaseWriteLock(&tvc->lock);
2582 afs_Trace4(afs_iclSetp, CM_TRACE_STUFFVCACHE, ICL_TYPE_POINTER, tvc,
2583 ICL_TYPE_POINTER, tvc->callback, ICL_TYPE_INT32,
2584 tvc->cbExpires, ICL_TYPE_INT32, tvc->cbExpires - osi_Time());
2586 * Release ref count... hope this guy stays around...
2589 } /*afs_StuffVcache */
2593 * Decrements the reference count on a cache entry.
2595 * \param avc Pointer to the cache entry to decrement.
2597 * \note Environment: Nothing interesting.
2600 afs_PutVCache(struct vcache *avc)
2602 AFS_STATCNT(afs_PutVCache);
2603 #ifdef AFS_DARWIN80_ENV
2604 vnode_put(AFSTOV(avc));
2608 * Can we use a read lock here?
2610 ObtainReadLock(&afs_xvcache);
2612 ReleaseReadLock(&afs_xvcache);
2614 } /*afs_PutVCache */
2618 * Reset a vcache entry, so local contents are ignored, and the
2619 * server will be reconsulted next time the vcache is used
2621 * \param avc Pointer to the cache entry to reset
2623 * \param skipdnlc skip the dnlc purge for this vnode
2625 * \note avc must be write locked on entry
2627 * \note The caller should purge the dnlc when skipdnlc is set.
2630 afs_ResetVCache(struct vcache *avc, afs_ucred_t *acred, afs_int32 skipdnlc)
2632 afs_stalevc_flags_t flags = 0;
2634 flags |= AFS_STALEVC_NODNLC;
2637 afs_StaleVCacheFlags(avc, flags, CDirty); /* next reference will re-stat */
2638 /* now find the disk cache entries */
2639 afs_TryToSmush(avc, acred, 1);
2640 if (avc->linkData && !(avc->f.states & CCore)) {
2641 afs_osi_Free(avc->linkData, strlen(avc->linkData) + 1);
2642 avc->linkData = NULL;
2647 * Sleepa when searching for a vcache. Releases all the pending locks,
2648 * sleeps then obtains the previously released locks.
2650 * \param vcache Enter sleep state.
2651 * \param flag Determines what locks to use.
2656 findvc_sleep(struct vcache *avc, int flag)
2658 if (flag & IS_SLOCK) {
2659 ReleaseSharedLock(&afs_xvcache);
2661 if (flag & IS_WLOCK) {
2662 ReleaseWriteLock(&afs_xvcache);
2664 ReleaseReadLock(&afs_xvcache);
2667 afs_osi_Sleep(&avc->f.states);
2668 if (flag & IS_SLOCK) {
2669 ObtainSharedLock(&afs_xvcache, 341);
2671 if (flag & IS_WLOCK) {
2672 ObtainWriteLock(&afs_xvcache, 343);
2674 ObtainReadLock(&afs_xvcache);
2680 * Add a reference on an existing vcache entry.
2682 * \param tvc Pointer to the vcache.
2684 * \note Environment: Must be called with at least one reference from
2685 * elsewhere on the vcache, even if that reference will be dropped.
2686 * The global lock is required.
2688 * \return 0 on success, -1 on failure.
2692 afs_RefVCache(struct vcache *tvc)
2694 #ifdef AFS_DARWIN80_ENV
2698 /* AFS_STATCNT(afs_RefVCache); */
2700 #ifdef AFS_DARWIN80_ENV
2704 if (vnode_ref(tvp)) {
2706 /* AFSTOV(tvc) may be NULL */
2715 } /*afs_RefVCache */
2718 * Find a vcache entry given a fid.
2720 * \param afid Pointer to the fid whose cache entry we desire.
2721 * \param retry (SGI-specific) tell the caller to drop the lock on xvcache,
2722 * unlock the vnode, and try again.
2723 * \param flag Bit 1 to specify whether to compute hit statistics. Not
2724 * set if FindVCache is called as part of internal bookkeeping.
2726 * \note Environment: Must be called with the afs_xvcache lock at least held at
2727 * the read level. In order to do the VLRU adjustment, the xvcache lock
2728 * must be shared-- we upgrade it here.
2732 afs_FindVCache(struct VenusFid *afid, afs_int32 * retry, afs_int32 flag)
2737 #ifdef AFS_DARWIN80_ENV
2738 struct vcache *deadvc = NULL, *livevc = NULL;
2742 AFS_STATCNT(afs_FindVCache);
2746 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2747 if (FidMatches(afid, tvc)) {
2748 if (tvc->f.states & CVInit) {
2749 findvc_sleep(tvc, flag);
2752 #ifdef AFS_DARWIN80_ENV
2753 if (tvc->f.states & CDeadVnode) {
2754 findvc_sleep(tvc, flag);
2762 /* should I have a read lock on the vnode here? */
2766 #if defined(AFS_DARWIN80_ENV)
2770 if (tvp && vnode_ref(tvp)) {
2772 /* AFSTOV(tvc) may be NULL */
2781 #elif defined(AFS_DARWIN_ENV)
2782 tvc->f.states |= CUBCinit;
2784 if (UBCINFOMISSING(AFSTOV(tvc)) ||
2785 UBCINFORECLAIMED(AFSTOV(tvc))) {
2786 ubc_info_init(AFSTOV(tvc));
2789 tvc->f.states &= ~CUBCinit;
2791 osi_vnhold(tvc, retry); /* already held, above */
2792 if (retry && *retry)
2796 * only move to front of vlru if we have proper vcache locking)
2798 if (flag & DO_VLRU) {
2799 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2800 refpanic("FindVC VLRU inconsistent1");
2802 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2803 refpanic("FindVC VLRU inconsistent1");
2805 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2806 refpanic("FindVC VLRU inconsistent2");
2808 UpgradeSToWLock(&afs_xvcache, 26);
2809 QRemove(&tvc->vlruq);
2810 QAdd(&VLRU, &tvc->vlruq);
2811 ConvertWToSLock(&afs_xvcache);
2812 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2813 refpanic("FindVC VLRU inconsistent1");
2815 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2816 refpanic("FindVC VLRU inconsistent2");
2818 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2819 refpanic("FindVC VLRU inconsistent3");
2825 if (flag & DO_STATS) {
2827 afs_stats_cmperf.vcacheHits++;
2829 afs_stats_cmperf.vcacheMisses++;
2830 if (afs_IsPrimaryCellNum(afid->Cell))
2831 afs_stats_cmperf.vlocalAccesses++;
2833 afs_stats_cmperf.vremoteAccesses++;
2836 } /*afs_FindVCache */
2839 * Find a vcache entry given a fid. Does a wildcard match on what we
2840 * have for the fid. If more than one entry, don't return anything.
2842 * \param avcp Fill in pointer if we found one and only one.
2843 * \param afid Pointer to the fid whose cache entry we desire.
2844 * \param retry (SGI-specific) tell the caller to drop the lock on xvcache,
2845 * unlock the vnode, and try again.
2846 * \param flags bit 1 to specify whether to compute hit statistics. Not
2847 * set if FindVCache is called as part of internal bookkeeping.
2849 * \note Environment: Must be called with the afs_xvcache lock at least held at
2850 * the read level. In order to do the VLRU adjustment, the xvcache lock
2851 * must be shared-- we upgrade it here.
2853 * \return Number of matches found.
2856 int afs_duplicate_nfs_fids = 0;
2859 afs_NFSFindVCache(struct vcache **avcp, struct VenusFid *afid)
2863 afs_int32 count = 0;
2864 struct vcache *found_tvc = NULL;
2865 #ifdef AFS_DARWIN80_ENV
2869 AFS_STATCNT(afs_FindVCache);
2873 ObtainSharedLock(&afs_xvcache, 331);
2876 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2877 /* Match only on what we have.... */
2878 if (((tvc->f.fid.Fid.Vnode & 0xffff) == afid->Fid.Vnode)
2879 && (tvc->f.fid.Fid.Volume == afid->Fid.Volume)
2880 && ((tvc->f.fid.Fid.Unique & 0xffffff) == afid->Fid.Unique)
2881 && (tvc->f.fid.Cell == afid->Cell)) {
2882 if (tvc->f.states & CVInit) {
2883 ReleaseSharedLock(&afs_xvcache);
2884 afs_osi_Sleep(&tvc->f.states);
2887 #ifdef AFS_DARWIN80_ENV
2888 if (tvc->f.states & CDeadVnode) {
2889 ReleaseSharedLock(&afs_xvcache);
2890 afs_osi_Sleep(&tvc->f.states);
2894 if (vnode_get(tvp)) {
2895 /* This vnode no longer exists. */
2898 if (vnode_ref(tvp)) {
2899 /* This vnode no longer exists. */
2901 /* AFSTOV(tvc) may be NULL */
2906 #endif /* AFS_DARWIN80_ENV */
2910 afs_duplicate_nfs_fids++;
2911 ReleaseSharedLock(&afs_xvcache);
2912 #ifdef AFS_DARWIN80_ENV
2913 /* Drop our reference counts. */
2914 vnode_put(AFSTOV(tvc));
2915 vnode_put(AFSTOV(found_tvc));
2924 /* should I have a read lock on the vnode here? */
2926 #ifndef AFS_DARWIN80_ENV
2927 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2928 afs_int32 retry = 0;
2929 osi_vnhold(tvc, &retry);
2932 found_tvc = (struct vcache *)0;
2933 ReleaseSharedLock(&afs_xvcache);
2934 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2938 osi_vnhold(tvc, (int *)0); /* already held, above */
2942 * We obtained the xvcache lock above.
2944 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2945 refpanic("FindVC VLRU inconsistent1");
2947 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2948 refpanic("FindVC VLRU inconsistent1");
2950 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2951 refpanic("FindVC VLRU inconsistent2");
2953 UpgradeSToWLock(&afs_xvcache, 568);
2954 QRemove(&tvc->vlruq);
2955 QAdd(&VLRU, &tvc->vlruq);
2956 ConvertWToSLock(&afs_xvcache);
2957 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2958 refpanic("FindVC VLRU inconsistent1");
2960 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2961 refpanic("FindVC VLRU inconsistent2");
2963 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2964 refpanic("FindVC VLRU inconsistent3");
2970 afs_stats_cmperf.vcacheHits++;
2972 afs_stats_cmperf.vcacheMisses++;
2973 if (afs_IsPrimaryCellNum(afid->Cell))
2974 afs_stats_cmperf.vlocalAccesses++;
2976 afs_stats_cmperf.vremoteAccesses++;
2978 *avcp = tvc; /* May be null */
2980 ReleaseSharedLock(&afs_xvcache);
2981 return (tvc ? 1 : 0);
2983 } /*afs_NFSFindVCache */
2989 * Initialize vcache related variables
2994 afs_vcacheInit(int astatSize)
2996 #if !defined(AFS_LINUX22_ENV)
3000 if (!afs_maxvcount) {
3001 afs_maxvcount = astatSize; /* no particular limit on linux? */
3003 #if !defined(AFS_LINUX22_ENV)
3007 AFS_RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
3008 LOCK_INIT(&afs_xvcb, "afs_xvcb");
3010 #if !defined(AFS_LINUX22_ENV)
3011 /* Allocate and thread the struct vcache entries */
3012 tvp = afs_osi_Alloc(astatSize * sizeof(struct vcache));
3013 osi_Assert(tvp != NULL);
3014 memset(tvp, 0, sizeof(struct vcache) * astatSize);
3016 Initial_freeVCList = tvp;
3017 freeVCList = &(tvp[0]);
3018 for (i = 0; i < astatSize - 1; i++) {
3019 tvp[i].nextfree = &(tvp[i + 1]);
3021 tvp[astatSize - 1].nextfree = NULL;
3022 # ifdef KERNEL_HAVE_PIN
3023 pin((char *)tvp, astatSize * sizeof(struct vcache)); /* XXX */
3027 #if defined(AFS_SGI_ENV)
3028 for (i = 0; i < astatSize; i++) {
3029 char name[METER_NAMSZ];
3030 struct vcache *tvc = &tvp[i];
3032 tvc->v.v_number = ++afsvnumbers;
3033 tvc->vc_rwlockid = OSI_NO_LOCKID;
3034 initnsema(&tvc->vc_rwlock, 1,
3035 makesname(name, "vrw", tvc->v.v_number));
3036 #ifndef AFS_SGI53_ENV
3037 initnsema(&tvc->v.v_sync, 0, makesname(name, "vsy", tvc->v.v_number));
3039 #ifndef AFS_SGI62_ENV
3040 initnlock(&tvc->v.v_lock, makesname(name, "vlk", tvc->v.v_number));
3041 #endif /* AFS_SGI62_ENV */
3045 for(i = 0; i < VCSIZE; ++i)
3046 QInit(&afs_vhashTV[i]);
3053 shutdown_vcache(void)
3056 struct afs_cbr *tsp;
3058 * XXX We may potentially miss some of the vcaches because if when
3059 * there are no free vcache entries and all the vcache entries are active
3060 * ones then we allocate an additional one - admittedly we almost never
3065 struct afs_q *tq, *uq = NULL;
3067 for (tq = VLRU.prev; tq != &VLRU; tq = uq) {
3070 if (tvc->mvid.target_root) {
3071 osi_FreeSmallSpace(tvc->mvid.target_root);
3072 tvc->mvid.target_root = NULL;
3075 aix_gnode_rele(AFSTOV(tvc));
3077 if (tvc->linkData) {
3078 afs_osi_Free(tvc->linkData, strlen(tvc->linkData) + 1);
3083 * Also free the remaining ones in the Cache
3085 for (i = 0; i < VCSIZE; i++) {
3086 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
3087 if (tvc->mvid.target_root) {
3088 osi_FreeSmallSpace(tvc->mvid.target_root);
3089 tvc->mvid.target_root = NULL;
3093 afs_osi_Free(tvc->v.v_gnode, sizeof(struct gnode));
3094 #ifdef AFS_AIX32_ENV
3097 vms_delete(tvc->segid);
3099 tvc->segid = tvc->vmh = NULL;
3100 if (VREFCOUNT_GT(tvc,0))
3101 osi_Panic("flushVcache: vm race");
3109 #if defined(AFS_SUN5_ENV)
3115 if (tvc->linkData) {
3116 afs_osi_Free(tvc->linkData, strlen(tvc->linkData) + 1);
3121 afs_FreeAllAxs(&(tvc->Access));
3127 * Free any leftover callback queue
3129 for (i = 0; i < afs_stats_cmperf.CallBackAlloced; i++) {
3130 tsp = afs_cbrHeads[i];
3131 afs_cbrHeads[i] = 0;
3132 afs_osi_Free((char *)tsp, AFS_NCBRS * sizeof(struct afs_cbr));
3136 #if !defined(AFS_LINUX22_ENV)
3137 afs_osi_Free(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
3139 # ifdef KERNEL_HAVE_PIN
3140 unpin(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
3143 freeVCList = Initial_freeVCList = 0;
3146 AFS_RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
3147 LOCK_INIT(&afs_xvcb, "afs_xvcb");
3149 for(i = 0; i < VCSIZE; ++i)
3150 QInit(&afs_vhashTV[i]);
3154 afs_DisconGiveUpCallbacks(void)
3160 ObtainWriteLock(&afs_xvcache, 1002); /* XXX - should be a unique number */
3163 /* Somehow, walk the set of vcaches, with each one coming out as tvc */
3164 for (i = 0; i < VCSIZE; i++) {
3165 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
3167 if (afs_QueueVCB(tvc, &slept)) {
3168 tvc->callback = NULL;
3177 ReleaseWriteLock(&afs_xvcache);
3184 * Clear the Statd flag from all vcaches
3186 * This function removes the Statd flag from all vcaches. It's used by
3187 * disconnected mode to tidy up during reconnection
3191 afs_ClearAllStatdFlag(void)
3196 ObtainWriteLock(&afs_xvcache, 715);
3198 for (i = 0; i < VCSIZE; i++) {
3199 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
3200 afs_StaleVCacheFlags(tvc, AFS_STALEVC_NODNLC | AFS_STALEVC_NOCB,
3204 ReleaseWriteLock(&afs_xvcache);
3208 * Mark a vcache as stale; our metadata for the relevant file may be out of
3211 * @post Any subsequent access to this vcache will cause us to fetch the
3212 * metadata for this vcache again.
3215 afs_StaleVCacheFlags(struct vcache *avc, afs_stalevc_flags_t flags,
3219 int do_filename = 0;
3221 int lock_cbhash = 1;
3223 if ((flags & AFS_STALEVC_NODNLC)) {
3226 if ((flags & AFS_STALEVC_FILENAME)) {
3229 if ((flags & AFS_STALEVC_CBLOCKED)) {
3232 if ((flags & AFS_STALEVC_NOCB)) {
3238 ObtainWriteLock(&afs_xcbhash, 486);
3241 afs_DequeueCallback(avc);
3245 avc->f.states &= ~cflags;
3248 ReleaseWriteLock(&afs_xcbhash);
3251 if ((flags & AFS_STALEVC_SKIP_DNLC_FOR_INIT_FLUSHED) &&
3252 (avc->f.states & (CVInit | CVFlushed))) {
3256 if (flags & AFS_STALEVC_CLEARCB) {
3257 avc->callback = NULL;
3261 if ((avc->f.fid.Fid.Vnode & 1) ||
3262 AFSTOV(avc) == NULL || vType(avc) == VDIR ||
3263 (avc->f.states & CForeign)) {
3264 /* This vcache is (or could be) a directory. */
3265 osi_dnlc_purgedp(avc);
3267 } else if (do_filename) {
3268 osi_dnlc_purgevp(avc);
3274 afs_SetDataVersion(struct vcache *avc, afs_hyper_t *avers)
3276 hset(avc->f.m.DataVersion, *avers);