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);
89 * Generate an index into the hash table for a given Fid.
91 * \return The hash value.
94 afs_HashCBRFid(struct AFSFid *fid)
96 return (fid->Volume + fid->Vnode + fid->Unique) % CBRSIZE;
100 * Insert a CBR entry into the hash table.
101 * Must be called with afs_xvcb held.
106 afs_InsertHashCBR(struct afs_cbr *cbr)
108 int slot = afs_HashCBRFid(&cbr->fid);
110 cbr->hash_next = afs_cbrHashT[slot];
111 if (afs_cbrHashT[slot])
112 afs_cbrHashT[slot]->hash_pprev = &cbr->hash_next;
114 cbr->hash_pprev = &afs_cbrHashT[slot];
115 afs_cbrHashT[slot] = cbr;
120 * Flush the given vcache entry.
123 * afs_xvcache lock must be held for writing upon entry to
124 * prevent people from changing the vrefCount field, and to
125 * protect the lruq and hnext fields.
126 * LOCK: afs_FlushVCache afs_xvcache W
127 * REFCNT: vcache ref count must be zero on entry except for osf1
128 * RACE: lock is dropped and reobtained, permitting race in caller
130 * \param avc Pointer to vcache entry to flush.
131 * \param slept Pointer to int to set 1 if we sleep/drop locks, 0 if we don't.
135 afs_FlushVCache(struct vcache *avc, int *slept)
136 { /*afs_FlushVCache */
139 struct vcache **uvc, *wvc;
142 AFS_STATCNT(afs_FlushVCache);
143 afs_Trace2(afs_iclSetp, CM_TRACE_FLUSHV, ICL_TYPE_POINTER, avc,
144 ICL_TYPE_INT32, avc->f.states);
146 code = osi_VM_FlushVCache(avc, slept);
150 if (avc->f.states & CVFlushed) {
154 #if !defined(AFS_LINUX22_ENV)
155 if (avc->nextfree || !avc->vlruq.prev || !avc->vlruq.next) { /* qv afs.h */
156 refpanic("LRU vs. Free inconsistency");
159 avc->f.states |= CVFlushed;
160 /* pull the entry out of the lruq and put it on the free list */
161 QRemove(&avc->vlruq);
163 /* keep track of # of files that we bulk stat'd, but never used
164 * before they got recycled.
166 if (avc->f.states & CBulkStat)
169 /* remove entry from the hash chain */
170 i = VCHash(&avc->f.fid);
171 uvc = &afs_vhashT[i];
172 for (wvc = *uvc; wvc; uvc = &wvc->hnext, wvc = *uvc) {
175 avc->hnext = (struct vcache *)NULL;
180 /* remove entry from the volume hash table */
181 QRemove(&avc->vhashq);
184 osi_FreeSmallSpace(avc->mvid);
185 avc->mvid = (struct VenusFid *)0;
187 afs_osi_Free(avc->linkData, strlen(avc->linkData) + 1);
188 avc->linkData = NULL;
190 #if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV)
191 /* OK, there are no internal vrefCounts, so there shouldn't
192 * be any more refs here. */
194 #ifdef AFS_DARWIN80_ENV
195 vnode_clearfsnode(AFSTOV(avc));
196 vnode_removefsref(AFSTOV(avc));
198 avc->v->v_data = NULL; /* remove from vnode */
200 AFSTOV(avc) = NULL; /* also drop the ptr to vnode */
203 #ifdef AFS_SUN510_ENV
204 /* As we use private vnodes, cleanup is up to us */
205 vn_reinit(AFSTOV(avc));
207 afs_FreeAllAxs(&(avc->Access));
209 ObtainWriteLock(&afs_xcbhash, 460);
210 afs_DequeueCallback(avc); /* remove it from queued callbacks list */
211 avc->f.states &= ~(CStatd | CUnique);
212 ReleaseWriteLock(&afs_xcbhash);
213 if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
214 osi_dnlc_purgedp(avc); /* if it (could be) a directory */
216 osi_dnlc_purgevp(avc);
219 * Next, keep track of which vnodes we've deleted for create's
220 * optimistic synchronization algorithm
223 if (avc->f.fid.Fid.Vnode & 1)
229 #if !defined(AFS_LINUX22_ENV)
230 /* put the entry in the free list */
231 avc->nextfree = freeVCList;
233 if (avc->vlruq.prev || avc->vlruq.next) {
234 refpanic("LRU vs. Free inconsistency");
236 avc->f.states |= CVFlushed;
238 /* This should put it back on the vnode free list since usecount is 1 */
240 if (VREFCOUNT_GT(avc,0)) {
241 AFS_RELE(AFSTOV(avc));
242 afs_stats_cmperf.vcacheXAllocs--;
244 if (afs_norefpanic) {
245 afs_warn("flush vc refcnt < 1");
248 osi_Panic("flush vc refcnt < 1");
250 #endif /* AFS_LINUX22_ENV */
255 } /*afs_FlushVCache */
259 * The core of the inactive vnode op for all but IRIX.
265 afs_InactiveVCache(struct vcache *avc, afs_ucred_t *acred)
267 AFS_STATCNT(afs_inactive);
268 if (avc->f.states & CDirty) {
269 /* we can't keep trying to push back dirty data forever. Give up. */
270 afs_InvalidateAllSegments(avc); /* turns off dirty bit */
272 avc->f.states &= ~CMAPPED; /* mainly used by SunOS 4.0.x */
273 avc->f.states &= ~CDirty; /* Turn it off */
274 if (avc->f.states & CUnlinked) {
275 if (CheckLock(&afs_xvcache) || CheckLock(&afs_xdcache)) {
276 avc->f.states |= CUnlinkedDel;
279 afs_remunlink(avc, 1); /* ignore any return code */
286 * Allocate a callback return structure from the
287 * free list and return it.
289 * Environment: The alloc and free routines are both called with the afs_xvcb lock
290 * held, so we don't have to worry about blocking in osi_Alloc.
292 * \return The allocated afs_cbr.
294 static struct afs_cbr *afs_cbrSpace = 0;
295 /* if alloc limit below changes, fix me! */
296 static struct afs_cbr *afs_cbrHeads[16];
300 register struct afs_cbr *tsp;
304 afs_osi_CancelWait(&AFS_WaitHandler); /* trigger FlushVCBs asap */
306 if (afs_stats_cmperf.CallBackAlloced >= sizeof(afs_cbrHeads)/sizeof(afs_cbrHeads[0])) {
307 /* don't allocate more than 16 * AFS_NCBRS for now */
308 tsp = (struct afs_cbr *)osi_AllocSmallSpace(sizeof(*tsp));
311 afs_stats_cmperf.CallBackFlushes++;
315 (struct afs_cbr *)afs_osi_Alloc(AFS_NCBRS *
316 sizeof(struct afs_cbr));
317 for (i = 0; i < AFS_NCBRS - 1; i++) {
318 tsp[i].next = &tsp[i + 1];
321 tsp[AFS_NCBRS - 1].next = 0;
322 tsp[AFS_NCBRS - 1].dynalloc = 0;
323 afs_cbrSpace = tsp->next;
324 afs_cbrHeads[afs_stats_cmperf.CallBackAlloced] = tsp;
325 afs_stats_cmperf.CallBackAlloced++;
329 afs_cbrSpace = tsp->next;
335 * Free a callback return structure, removing it from all lists.
337 * Environment: the xvcb lock is held over these calls.
339 * \param asp The address of the structure to free.
344 afs_FreeCBR(register struct afs_cbr *asp)
346 *(asp->pprev) = asp->next;
348 asp->next->pprev = asp->pprev;
350 *(asp->hash_pprev) = asp->hash_next;
352 asp->hash_next->hash_pprev = asp->hash_pprev;
355 osi_FreeSmallSpace(asp);
357 asp->next = afs_cbrSpace;
364 * Flush all queued callbacks to all servers.
366 * Environment: holds xvcb lock over RPC to guard against race conditions
367 * when a new callback is granted for the same file later on.
369 * \return 0 for success.
372 afs_FlushVCBs(afs_int32 lockit)
374 struct AFSFid *tfids;
375 struct AFSCallBack callBacks[1];
376 struct AFSCBFids fidArray;
377 struct AFSCBs cbArray;
379 struct afs_cbr *tcbrp;
383 struct vrequest treq;
385 int safety1, safety2, safety3;
387 if ((code = afs_InitReq(&treq, afs_osi_credp)))
389 treq.flags |= O_NONBLOCK;
390 tfids = afs_osi_Alloc(sizeof(struct AFSFid) * AFS_MAXCBRSCALL);
393 ObtainWriteLock(&afs_xvcb, 273);
394 ObtainReadLock(&afs_xserver);
395 for (i = 0; i < NSERVERS; i++) {
396 for (safety1 = 0, tsp = afs_servers[i];
397 tsp && safety1 < afs_totalServers + 10;
398 tsp = tsp->next, safety1++) {
400 if (tsp->cbrs == (struct afs_cbr *)0)
403 /* otherwise, grab a block of AFS_MAXCBRSCALL from the list
404 * and make an RPC, over and over again.
406 tcount = 0; /* number found so far */
407 for (safety2 = 0; safety2 < afs_cacheStats; safety2++) {
408 if (tcount >= AFS_MAXCBRSCALL || !tsp->cbrs) {
409 /* if buffer is full, or we've queued all we're going
410 * to from this server, we should flush out the
413 fidArray.AFSCBFids_len = tcount;
414 fidArray.AFSCBFids_val = (struct AFSFid *)tfids;
415 cbArray.AFSCBs_len = 1;
416 cbArray.AFSCBs_val = callBacks;
417 memset(&callBacks[0], 0, sizeof(callBacks[0]));
418 callBacks[0].CallBackType = CB_EXCLUSIVE;
419 for (safety3 = 0; safety3 < AFS_MAXHOSTS * 2; safety3++) {
420 tc = afs_ConnByHost(tsp, tsp->cell->fsport,
421 tsp->cell->cellNum, &treq, 0,
425 (AFS_STATS_FS_RPCIDX_GIVEUPCALLBACKS);
428 RXAFS_GiveUpCallBacks(tc->id, &fidArray,
436 AFS_STATS_FS_RPCIDX_GIVEUPCALLBACKS, SHARED_LOCK,
441 /* ignore return code, since callbacks may have
442 * been returned anyway, we shouldn't leave them
443 * around to be returned again.
445 * Next, see if we are done with this server, and if so,
446 * break to deal with the next one.
452 /* if to flush full buffer */
453 /* if we make it here, we have an entry at the head of cbrs,
454 * which we should copy to the file ID array and then free.
457 tfids[tcount++] = tcbrp->fid;
459 /* Freeing the CBR will unlink it from the server's CBR list */
461 } /* while loop for this one server */
462 if (safety2 > afs_cacheStats) {
463 afs_warn("possible internal error afs_flushVCBs (%d)\n",
466 } /* for loop for this hash chain */
467 } /* loop through all hash chains */
468 if (safety1 > afs_totalServers + 2) {
470 ("AFS internal error (afs_flushVCBs) (%d > %d), continuing...\n",
471 safety1, afs_totalServers + 2);
473 osi_Panic("afs_flushVCBS safety1");
476 ReleaseReadLock(&afs_xserver);
478 ReleaseWriteLock(&afs_xvcb);
479 afs_osi_Free(tfids, sizeof(struct AFSFid) * AFS_MAXCBRSCALL);
484 * Queue a callback on the given fid.
487 * Locks the xvcb lock.
488 * Called when the xvcache lock is already held.
490 * \param avc vcache entry
491 * \return 1 if queued, 0 otherwise
495 afs_QueueVCB(struct vcache *avc)
499 struct afs_cbr *tcbp;
501 AFS_STATCNT(afs_QueueVCB);
503 ObtainWriteLock(&afs_xvcb, 274);
505 /* we can't really give back callbacks on RO files, since the
506 * server only tracks them on a per-volume basis, and we don't
507 * know whether we still have some other files from the same
509 if (!((avc->f.states & CRO) == 0 && avc->callback)) {
513 /* The callback is really just a struct server ptr. */
514 tsp = (struct server *)(avc->callback);
516 /* we now have a pointer to the server, so we just allocate
517 * a queue entry and queue it.
519 tcbp = afs_AllocCBR();
520 tcbp->fid = avc->f.fid.Fid;
522 tcbp->next = tsp->cbrs;
524 tsp->cbrs->pprev = &tcbp->next;
527 tcbp->pprev = &tsp->cbrs;
529 afs_InsertHashCBR(tcbp);
533 /* now release locks and return */
534 ReleaseWriteLock(&afs_xvcb);
540 * Remove a queued callback for a given Fid.
543 * Locks xvcb and xserver locks.
544 * Typically called with xdcache, xvcache and/or individual vcache
547 * \param afid The fid we want cleansed of queued callbacks.
552 afs_RemoveVCB(struct VenusFid *afid)
555 struct afs_cbr *cbr, *ncbr;
557 AFS_STATCNT(afs_RemoveVCB);
558 ObtainWriteLock(&afs_xvcb, 275);
560 slot = afs_HashCBRFid(&afid->Fid);
561 ncbr = afs_cbrHashT[slot];
565 ncbr = cbr->hash_next;
567 if (afid->Fid.Volume == cbr->fid.Volume &&
568 afid->Fid.Vnode == cbr->fid.Vnode &&
569 afid->Fid.Unique == cbr->fid.Unique) {
574 ReleaseWriteLock(&afs_xvcb);
578 afs_FlushReclaimedVcaches(void)
580 #if !defined(AFS_LINUX22_ENV)
583 struct vcache *tmpReclaimedVCList = NULL;
585 ObtainWriteLock(&afs_xvreclaim, 76);
586 while (ReclaimedVCList) {
587 tvc = ReclaimedVCList; /* take from free list */
588 ReclaimedVCList = tvc->nextfree;
589 tvc->nextfree = NULL;
590 code = afs_FlushVCache(tvc, &fv_slept);
592 /* Ok, so, if we got code != 0, uh, wtf do we do? */
593 /* Probably, build a temporary list and then put all back when we
594 get to the end of the list */
595 /* This is actually really crappy, but we need to not leak these.
596 We probably need a way to be smarter about this. */
597 tvc->nextfree = tmpReclaimedVCList;
598 tmpReclaimedVCList = tvc;
599 /* printf("Reclaim list flush %lx failed: %d\n", (unsigned long) tvc, code); */
601 if (tvc->f.states & (CVInit
602 #ifdef AFS_DARWIN80_ENV
606 tvc->f.states &= ~(CVInit
607 #ifdef AFS_DARWIN80_ENV
611 afs_osi_Wakeup(&tvc->f.states);
614 if (tmpReclaimedVCList)
615 ReclaimedVCList = tmpReclaimedVCList;
617 ReleaseWriteLock(&afs_xvreclaim);
622 afs_PostPopulateVCache(struct vcache *avc, struct VenusFid *afid, int seq)
625 * The proper value for mvstat (for root fids) is setup by the caller.
628 if (afid->Fid.Vnode == 1 && afid->Fid.Unique == 1)
631 if (afs_globalVFS == 0)
632 osi_Panic("afs globalvfs");
634 osi_PostPopulateVCache(avc);
637 osi_dnlc_purgedp(avc); /* this may be overkill */
638 memset(&(avc->callsort), 0, sizeof(struct afs_q));
640 avc->f.states &=~ CVInit;
642 avc->f.states |= CBulkFetching;
643 avc->f.m.Length = seq;
645 afs_osi_Wakeup(&avc->f.states);
649 afs_ShakeLooseVCaches(afs_int32 anumber)
653 struct afs_q *tq, *uq;
655 afs_int32 target = anumber;
659 for (tq = VLRU.prev; tq != &VLRU && anumber > 0; tq = uq) {
662 if (tvc->f.states & CVFlushed) {
663 refpanic("CVFlushed on VLRU");
664 /* In the other path, this was 2 * afs_cacheStats */
665 } else if (!afsd_dynamic_vcaches && i++ > afs_maxvcount) {
666 refpanic("Exceeded pool of AFS vnodes(VLRU cycle?)");
667 } else if (QNext(uq) != tq) {
668 refpanic("VLRU inconsistent");
672 if (osi_TryEvictVCache(tvc, &fv_slept))
680 continue; /* start over - may have raced. */
685 if (!afsd_dynamic_vcaches && anumber == target) {
686 afs_warn("afs_ShakeLooseVCaches: warning none freed, using %d of %d\n",
687 afs_vcount, afs_maxvcount);
693 /* Alloc new vnode. */
695 static struct vcache *
696 afs_AllocVCache(void)
700 tvc = osi_NewVnode();
705 if (afsd_dynamic_vcaches && afs_maxvcount < afs_vcount) {
706 afs_maxvcount = afs_vcount;
707 /*printf("peak vnodes: %d\n", afs_maxvcount);*/
710 afs_stats_cmperf.vcacheXAllocs++; /* count in case we have a leak */
712 /* If we create a new inode, we either give it a new slot number,
713 * or if one's available, use a slot number from the slot free list
715 if (afs_freeSlotList != NULL) {
716 struct afs_slotlist *tmp;
718 tvc->diskSlot = afs_freeSlotList->slot;
719 tmp = afs_freeSlotList;
720 afs_freeSlotList = tmp->next;
721 afs_osi_Free(tmp, sizeof(struct afs_slotlist));
723 tvc->diskSlot = afs_nextVcacheSlot++;
729 /* Pre populate a newly allocated vcache. On platforms where the actual
730 * vnode is attached to the vcache, this function is called before attachment,
731 * therefore it cannot perform any actions on the vnode itself */
734 afs_PrePopulateVCache(struct vcache *avc, struct VenusFid *afid,
735 struct server *serverp) {
738 slot = avc->diskSlot;
740 osi_PrePopulateVCache(avc);
742 avc->diskSlot = slot;
743 QZero(&avc->metadirty);
745 AFS_RWLOCK_INIT(&avc->lock, "vcache lock");
748 avc->linkData = NULL;
751 avc->execsOrWriters = 0;
753 avc->f.states = CVInit;
754 avc->last_looker = 0;
756 avc->asynchrony = -1;
760 avc->f.truncPos = AFS_NOTRUNC; /* don't truncate until we need to */
761 hzero(avc->f.m.DataVersion); /* in case we copy it into flushDV */
763 avc->callback = serverp; /* to minimize chance that clear
766 #if defined(AFS_CACHE_BYPASS)
767 avc->cachingStates = 0;
768 avc->cachingTransitions = 0;
773 * This routine is responsible for allocating a new cache entry
774 * from the free list. It formats the cache entry and inserts it
775 * into the appropriate hash tables. It must be called with
776 * afs_xvcache write-locked so as to prevent several processes from
777 * trying to create a new cache entry simultaneously.
779 * LOCK: afs_NewVCache afs_xvcache W
781 * \param afid The file id of the file whose cache entry is being created.
783 * \return The new vcache struct.
786 static_inline struct vcache *
787 afs_NewVCache_int(struct VenusFid *afid, struct server *serverp, int seq)
791 afs_int32 anumber = VCACHE_FREE;
793 AFS_STATCNT(afs_NewVCache);
795 afs_FlushReclaimedVcaches();
797 #if defined(AFS_LINUX22_ENV)
798 if(!afsd_dynamic_vcaches) {
799 afs_ShakeLooseVCaches(anumber);
800 if (afs_vcount >= afs_maxvcount) {
801 afs_warn("afs_NewVCache - none freed\n");
805 tvc = afs_AllocVCache();
806 #else /* AFS_LINUX22_ENV */
807 /* pull out a free cache entry */
809 afs_ShakeLooseVCaches(anumber);
813 tvc = afs_AllocVCache();
815 tvc = freeVCList; /* take from free list */
816 freeVCList = tvc->nextfree;
817 tvc->nextfree = NULL;
818 } /* end of if (!freeVCList) */
820 #endif /* AFS_LINUX22_ENV */
822 #if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV)
824 panic("afs_NewVCache(): free vcache with vnode attached");
827 /* Populate the vcache with as much as we can. */
828 afs_PrePopulateVCache(tvc, afid, serverp);
830 /* Thread the vcache onto the VLRU */
835 tvc->hnext = afs_vhashT[i];
837 QAdd(&afs_vhashTV[j], &tvc->vhashq);
839 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
840 refpanic("NewVCache VLRU inconsistent");
842 QAdd(&VLRU, &tvc->vlruq); /* put in lruq */
843 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
844 refpanic("NewVCache VLRU inconsistent2");
846 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
847 refpanic("NewVCache VLRU inconsistent3");
849 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
850 refpanic("NewVCache VLRU inconsistent4");
854 /* it should now be safe to drop the xvcache lock - so attach an inode
855 * to this vcache, where necessary */
856 osi_AttachVnode(tvc, seq);
858 /* Get a reference count to hold this vcache for the VLRUQ. Note that
859 * we have to do this after attaching the vnode, because the reference
860 * count may be held in the vnode itself */
862 #if defined(AFS_LINUX22_ENV)
863 /* Hold it for the LRU (should make count 2) */
865 #elif !(defined (AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV))
866 VREFCOUNT_SET(tvc, 1); /* us */
869 #if defined (AFS_FBSD_ENV)
870 if (tvc->f.states & CVInit)
872 afs_PostPopulateVCache(tvc, afid, seq);
879 afs_NewVCache(struct VenusFid *afid, struct server *serverp)
881 return afs_NewVCache_int(afid, serverp, 0);
885 afs_NewBulkVCache(struct VenusFid *afid, struct server *serverp, int seq)
887 return afs_NewVCache_int(afid, serverp, seq);
893 * LOCK: afs_FlushActiveVcaches afs_xvcache N
895 * \param doflocks : Do we handle flocks?
898 afs_FlushActiveVcaches(register afs_int32 doflocks)
900 register struct vcache *tvc;
902 register struct afs_conn *tc;
903 register afs_int32 code;
904 afs_ucred_t *cred = NULL;
905 struct vrequest treq, ureq;
906 struct AFSVolSync tsync;
909 AFS_STATCNT(afs_FlushActiveVcaches);
910 ObtainReadLock(&afs_xvcache);
911 for (i = 0; i < VCSIZE; i++) {
912 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
913 if (tvc->f.states & CVInit) continue;
914 #ifdef AFS_DARWIN80_ENV
915 if (tvc->f.states & CDeadVnode &&
916 (tvc->f.states & (CCore|CUnlinkedDel) ||
917 tvc->flockCount)) panic("Dead vnode has core/unlinkedel/flock");
919 if (doflocks && tvc->flockCount != 0) {
920 /* if this entry has an flock, send a keep-alive call out */
922 ReleaseReadLock(&afs_xvcache);
923 ObtainWriteLock(&tvc->lock, 51);
925 afs_InitReq(&treq, afs_osi_credp);
926 treq.flags |= O_NONBLOCK;
928 tc = afs_Conn(&tvc->f.fid, &treq, SHARED_LOCK);
930 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_EXTENDLOCK);
933 RXAFS_ExtendLock(tc->id,
934 (struct AFSFid *)&tvc->f.fid.Fid,
941 (tc, code, &tvc->f.fid, &treq,
942 AFS_STATS_FS_RPCIDX_EXTENDLOCK, SHARED_LOCK, NULL));
944 ReleaseWriteLock(&tvc->lock);
945 #ifdef AFS_DARWIN80_ENV
947 ObtainReadLock(&afs_xvcache);
949 ObtainReadLock(&afs_xvcache);
954 if ((tvc->f.states & CCore) || (tvc->f.states & CUnlinkedDel)) {
956 * Don't let it evaporate in case someone else is in
957 * this code. Also, drop the afs_xvcache lock while
958 * getting vcache locks.
961 ReleaseReadLock(&afs_xvcache);
962 #ifdef AFS_BOZONLOCK_ENV
963 afs_BozonLock(&tvc->pvnLock, tvc);
965 #if defined(AFS_SGI_ENV)
967 * That's because if we come in via the CUnlinkedDel bit state path we'll be have 0 refcnt
969 osi_Assert(VREFCOUNT_GT(tvc,0));
970 AFS_RWLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
972 ObtainWriteLock(&tvc->lock, 52);
973 if (tvc->f.states & CCore) {
974 tvc->f.states &= ~CCore;
975 /* XXXX Find better place-holder for cred XXXX */
976 cred = (afs_ucred_t *)tvc->linkData;
977 tvc->linkData = NULL; /* XXX */
978 afs_InitReq(&ureq, cred);
979 afs_Trace2(afs_iclSetp, CM_TRACE_ACTCCORE,
980 ICL_TYPE_POINTER, tvc, ICL_TYPE_INT32,
981 tvc->execsOrWriters);
982 code = afs_StoreOnLastReference(tvc, &ureq);
983 ReleaseWriteLock(&tvc->lock);
984 #ifdef AFS_BOZONLOCK_ENV
985 afs_BozonUnlock(&tvc->pvnLock, tvc);
990 if (code && code != VNOVNODE) {
991 afs_StoreWarn(code, tvc->f.fid.Fid.Volume,
992 /* /dev/console */ 1);
994 } else if (tvc->f.states & CUnlinkedDel) {
998 ReleaseWriteLock(&tvc->lock);
999 #ifdef AFS_BOZONLOCK_ENV
1000 afs_BozonUnlock(&tvc->pvnLock, tvc);
1002 #if defined(AFS_SGI_ENV)
1003 AFS_RWUNLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1005 afs_remunlink(tvc, 0);
1006 #if defined(AFS_SGI_ENV)
1007 AFS_RWLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1010 /* lost (or won, perhaps) the race condition */
1011 ReleaseWriteLock(&tvc->lock);
1012 #ifdef AFS_BOZONLOCK_ENV
1013 afs_BozonUnlock(&tvc->pvnLock, tvc);
1016 #if defined(AFS_SGI_ENV)
1017 AFS_RWUNLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1019 #ifdef AFS_DARWIN80_ENV
1022 AFS_RELE(AFSTOV(tvc));
1023 /* Matches write code setting CCore flag */
1026 ObtainReadLock(&afs_xvcache);
1028 ObtainReadLock(&afs_xvcache);
1031 AFS_RELE(AFSTOV(tvc));
1032 /* Matches write code setting CCore flag */
1039 ReleaseReadLock(&afs_xvcache);
1045 * Make sure a cache entry is up-to-date status-wise.
1047 * NOTE: everywhere that calls this can potentially be sped up
1048 * by checking CStatd first, and avoiding doing the InitReq
1049 * if this is up-to-date.
1051 * Anymore, the only places that call this KNOW already that the
1052 * vcache is not up-to-date, so we don't screw around.
1054 * \param avc : Ptr to vcache entry to verify.
1060 * Make sure a cache entry is up-to-date status-wise.
1062 * NOTE: everywhere that calls this can potentially be sped up
1063 * by checking CStatd first, and avoiding doing the InitReq
1064 * if this is up-to-date.
1066 * Anymore, the only places that call this KNOW already that the
1067 * vcache is not up-to-date, so we don't screw around.
1069 * \param avc Pointer to vcache entry to verify.
1072 * \return 0 for success or other error codes.
1075 afs_VerifyVCache2(struct vcache *avc, struct vrequest *areq)
1077 register struct vcache *tvc;
1079 AFS_STATCNT(afs_VerifyVCache);
1081 /* otherwise we must fetch the status info */
1083 ObtainWriteLock(&avc->lock, 53);
1084 if (avc->f.states & CStatd) {
1085 ReleaseWriteLock(&avc->lock);
1088 ObtainWriteLock(&afs_xcbhash, 461);
1089 avc->f.states &= ~(CStatd | CUnique);
1090 avc->callback = NULL;
1091 afs_DequeueCallback(avc);
1092 ReleaseWriteLock(&afs_xcbhash);
1093 ReleaseWriteLock(&avc->lock);
1095 /* since we've been called back, or the callback has expired,
1096 * it's possible that the contents of this directory, or this
1097 * file's name have changed, thus invalidating the dnlc contents.
1099 if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
1100 osi_dnlc_purgedp(avc);
1102 osi_dnlc_purgevp(avc);
1104 /* fetch the status info */
1105 tvc = afs_GetVCache(&avc->f.fid, areq, NULL, avc);
1108 /* Put it back; caller has already incremented vrefCount */
1112 } /*afs_VerifyVCache */
1116 * Simple copy of stat info into cache.
1118 * Callers:as of 1992-04-29, only called by WriteVCache
1120 * \param avc Ptr to vcache entry involved.
1121 * \param astat Ptr to stat info to copy.
1125 afs_SimpleVStat(register struct vcache *avc,
1126 register struct AFSFetchStatus *astat, struct vrequest *areq)
1129 AFS_STATCNT(afs_SimpleVStat);
1131 #ifdef AFS_64BIT_CLIENT
1132 FillInt64(length, astat->Length_hi, astat->Length);
1133 #else /* AFS_64BIT_CLIENT */
1134 length = astat->Length;
1135 #endif /* AFS_64BIT_CLIENT */
1137 #if defined(AFS_SGI_ENV)
1138 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1139 && !AFS_VN_MAPPED((vnode_t *) avc)) {
1140 osi_Assert((valusema(&avc->vc_rwlock) <= 0)
1141 && (OSI_GET_LOCKID() == avc->vc_rwlockid));
1142 if (length < avc->f.m.Length) {
1143 vnode_t *vp = (vnode_t *) avc;
1145 osi_Assert(WriteLocked(&avc->lock));
1146 ReleaseWriteLock(&avc->lock);
1148 PTOSSVP(vp, (off_t) length, (off_t) MAXLONG);
1150 ObtainWriteLock(&avc->lock, 67);
1155 if (!afs_DirtyPages(avc)) {
1156 /* if actively writing the file, don't fetch over this value */
1157 afs_Trace3(afs_iclSetp, CM_TRACE_SIMPLEVSTAT, ICL_TYPE_POINTER, avc,
1158 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length),
1159 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1160 avc->f.m.Length = length;
1161 avc->f.m.Date = astat->ClientModTime;
1163 avc->f.m.Owner = astat->Owner;
1164 avc->f.m.Group = astat->Group;
1165 avc->f.m.Mode = astat->UnixModeBits;
1166 if (vType(avc) == VREG) {
1167 avc->f.m.Mode |= S_IFREG;
1168 } else if (vType(avc) == VDIR) {
1169 avc->f.m.Mode |= S_IFDIR;
1170 } else if (vType(avc) == VLNK) {
1171 avc->f.m.Mode |= S_IFLNK;
1172 if ((avc->f.m.Mode & 0111) == 0)
1175 if (avc->f.states & CForeign) {
1176 struct axscache *ac;
1177 avc->f.anyAccess = astat->AnonymousAccess;
1179 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1181 * Caller has at least one bit not covered by anonymous, and
1182 * thus may have interesting rights.
1184 * HOWEVER, this is a really bad idea, because any access query
1185 * for bits which aren't covered by anonymous, on behalf of a user
1186 * who doesn't have any special rights, will result in an answer of
1187 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1188 * It's an especially bad idea under Ultrix, since (due to the lack of
1189 * a proper access() call) it must perform several afs_access() calls
1190 * in order to create magic mode bits that vary according to who makes
1191 * the call. In other words, _every_ stat() generates a test for
1194 #endif /* badidea */
1195 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1196 ac->axess = astat->CallerAccess;
1197 else /* not found, add a new one if possible */
1198 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1201 } /*afs_SimpleVStat */
1205 * Store the status info *only* back to the server for a
1208 * Environment: Must be called with a shared lock held on the vnode.
1210 * \param avc Ptr to the vcache entry.
1211 * \param astatus Ptr to the status info to store.
1212 * \param areq Ptr to the associated vrequest.
1214 * \return Operation status.
1218 afs_WriteVCache(register struct vcache *avc,
1219 register struct AFSStoreStatus *astatus,
1220 struct vrequest *areq)
1223 struct afs_conn *tc;
1224 struct AFSFetchStatus OutStatus;
1225 struct AFSVolSync tsync;
1227 AFS_STATCNT(afs_WriteVCache);
1228 afs_Trace2(afs_iclSetp, CM_TRACE_WVCACHE, ICL_TYPE_POINTER, avc,
1229 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length));
1231 tc = afs_Conn(&avc->f.fid, areq, SHARED_LOCK);
1233 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STORESTATUS);
1236 RXAFS_StoreStatus(tc->id, (struct AFSFid *)&avc->f.fid.Fid,
1237 astatus, &OutStatus, &tsync);
1242 } while (afs_Analyze
1243 (tc, code, &avc->f.fid, areq, AFS_STATS_FS_RPCIDX_STORESTATUS,
1244 SHARED_LOCK, NULL));
1246 UpgradeSToWLock(&avc->lock, 20);
1248 /* success, do the changes locally */
1249 afs_SimpleVStat(avc, &OutStatus, areq);
1251 * Update the date, too. SimpleVStat didn't do this, since
1252 * it thought we were doing this after fetching new status
1253 * over a file being written.
1255 avc->f.m.Date = OutStatus.ClientModTime;
1257 /* failure, set up to check with server next time */
1258 ObtainWriteLock(&afs_xcbhash, 462);
1259 afs_DequeueCallback(avc);
1260 avc->f.states &= ~(CStatd | CUnique); /* turn off stat valid flag */
1261 ReleaseWriteLock(&afs_xcbhash);
1262 if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
1263 osi_dnlc_purgedp(avc); /* if it (could be) a directory */
1265 ConvertWToSLock(&avc->lock);
1268 } /*afs_WriteVCache */
1271 * Store status info only locally, set the proper disconnection flags
1272 * and add to dirty list.
1274 * \param avc The vcache to be written locally.
1275 * \param astatus Get attr fields from local store.
1276 * \param attrs This one is only of the vs_size.
1278 * \note Must be called with a shared lock on the vnode
1281 afs_WriteVCacheDiscon(register struct vcache *avc,
1282 register struct AFSStoreStatus *astatus,
1283 struct vattr *attrs)
1286 afs_int32 flags = 0;
1288 UpgradeSToWLock(&avc->lock, 700);
1290 if (!astatus->Mask) {
1296 /* Set attributes. */
1297 if (astatus->Mask & AFS_SETMODTIME) {
1298 avc->f.m.Date = astatus->ClientModTime;
1299 flags |= VDisconSetTime;
1302 if (astatus->Mask & AFS_SETOWNER) {
1303 /* printf("Not allowed yet. \n"); */
1304 /*avc->f.m.Owner = astatus->Owner;*/
1307 if (astatus->Mask & AFS_SETGROUP) {
1308 /* printf("Not allowed yet. \n"); */
1309 /*avc->f.m.Group = astatus->Group;*/
1312 if (astatus->Mask & AFS_SETMODE) {
1313 avc->f.m.Mode = astatus->UnixModeBits;
1315 #if 0 /* XXX: Leaving this out, so it doesn't mess up the file type flag.*/
1317 if (vType(avc) == VREG) {
1318 avc->f.m.Mode |= S_IFREG;
1319 } else if (vType(avc) == VDIR) {
1320 avc->f.m.Mode |= S_IFDIR;
1321 } else if (vType(avc) == VLNK) {
1322 avc->f.m.Mode |= S_IFLNK;
1323 if ((avc->f.m.Mode & 0111) == 0)
1327 flags |= VDisconSetMode;
1328 } /* if(astatus.Mask & AFS_SETMODE) */
1330 } /* if (!astatus->Mask) */
1332 if (attrs->va_size > 0) {
1333 /* XXX: Do I need more checks? */
1334 /* Truncation operation. */
1335 flags |= VDisconTrunc;
1339 afs_DisconAddDirty(avc, flags, 1);
1341 /* XXX: How about the rest of the fields? */
1343 ConvertWToSLock(&avc->lock);
1349 * Copy astat block into vcache info
1351 * \note This code may get dataversion and length out of sync if the file has
1352 * been modified. This is less than ideal. I haven't thought about it sufficiently
1353 * to be certain that it is adequate.
1355 * \note Environment: Must be called under a write lock
1357 * \param avc Ptr to vcache entry.
1358 * \param astat Ptr to stat block to copy in.
1359 * \param areq Ptr to associated request.
1362 afs_ProcessFS(register struct vcache *avc,
1363 register struct AFSFetchStatus *astat, struct vrequest *areq)
1366 AFS_STATCNT(afs_ProcessFS);
1368 #ifdef AFS_64BIT_CLIENT
1369 FillInt64(length, astat->Length_hi, astat->Length);
1370 #else /* AFS_64BIT_CLIENT */
1371 length = astat->Length;
1372 #endif /* AFS_64BIT_CLIENT */
1373 /* WARNING: afs_DoBulkStat uses the Length field to store a sequence
1374 * number for each bulk status request. Under no circumstances
1375 * should afs_DoBulkStat store a sequence number if the new
1376 * length will be ignored when afs_ProcessFS is called with
1377 * new stats. If you change the following conditional then you
1378 * also need to change the conditional in afs_DoBulkStat. */
1380 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1381 && !AFS_VN_MAPPED((vnode_t *) avc)) {
1383 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)) {
1385 /* if we're writing or mapping this file, don't fetch over these
1388 afs_Trace3(afs_iclSetp, CM_TRACE_PROCESSFS, ICL_TYPE_POINTER, avc,
1389 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length),
1390 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1391 avc->f.m.Length = length;
1392 avc->f.m.Date = astat->ClientModTime;
1394 hset64(avc->f.m.DataVersion, astat->dataVersionHigh, astat->DataVersion);
1395 avc->f.m.Owner = astat->Owner;
1396 avc->f.m.Mode = astat->UnixModeBits;
1397 avc->f.m.Group = astat->Group;
1398 avc->f.m.LinkCount = astat->LinkCount;
1399 if (astat->FileType == File) {
1400 vSetType(avc, VREG);
1401 avc->f.m.Mode |= S_IFREG;
1402 } else if (astat->FileType == Directory) {
1403 vSetType(avc, VDIR);
1404 avc->f.m.Mode |= S_IFDIR;
1405 } else if (astat->FileType == SymbolicLink) {
1406 if (afs_fakestat_enable && (avc->f.m.Mode & 0111) == 0) {
1407 vSetType(avc, VDIR);
1408 avc->f.m.Mode |= S_IFDIR;
1410 vSetType(avc, VLNK);
1411 avc->f.m.Mode |= S_IFLNK;
1413 if ((avc->f.m.Mode & 0111) == 0) {
1417 avc->f.anyAccess = astat->AnonymousAccess;
1419 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1421 * Caller has at least one bit not covered by anonymous, and
1422 * thus may have interesting rights.
1424 * HOWEVER, this is a really bad idea, because any access query
1425 * for bits which aren't covered by anonymous, on behalf of a user
1426 * who doesn't have any special rights, will result in an answer of
1427 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1428 * It's an especially bad idea under Ultrix, since (due to the lack of
1429 * a proper access() call) it must perform several afs_access() calls
1430 * in order to create magic mode bits that vary according to who makes
1431 * the call. In other words, _every_ stat() generates a test for
1434 #endif /* badidea */
1436 struct axscache *ac;
1437 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1438 ac->axess = astat->CallerAccess;
1439 else /* not found, add a new one if possible */
1440 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1442 } /*afs_ProcessFS */
1446 * Get fid from server.
1449 * \param areq Request to be passed on.
1450 * \param name Name of ?? to lookup.
1451 * \param OutStatus Fetch status.
1456 * \return Success status of operation.
1459 afs_RemoteLookup(register struct VenusFid *afid, struct vrequest *areq,
1460 char *name, struct VenusFid *nfid,
1461 struct AFSFetchStatus *OutStatusp,
1462 struct AFSCallBack *CallBackp, struct server **serverp,
1463 struct AFSVolSync *tsyncp)
1467 register struct afs_conn *tc;
1468 struct AFSFetchStatus OutDirStatus;
1471 name = ""; /* XXX */
1473 tc = afs_Conn(afid, areq, SHARED_LOCK);
1476 *serverp = tc->srvr->server;
1478 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_XLOOKUP);
1481 RXAFS_Lookup(tc->id, (struct AFSFid *)&afid->Fid, name,
1482 (struct AFSFid *)&nfid->Fid, OutStatusp,
1483 &OutDirStatus, CallBackp, tsyncp);
1488 } while (afs_Analyze
1489 (tc, code, afid, areq, AFS_STATS_FS_RPCIDX_XLOOKUP, SHARED_LOCK,
1499 * Given a file id and a vrequest structure, fetch the status
1500 * information associated with the file.
1502 * \param afid File ID.
1503 * \param areq Ptr to associated vrequest structure, specifying the
1504 * user whose authentication tokens will be used.
1505 * \param avc Caller may already have a vcache for this file, which is
1508 * \note Environment:
1509 * The cache entry is returned with an increased vrefCount field.
1510 * The entry must be discarded by calling afs_PutVCache when you
1511 * are through using the pointer to the cache entry.
1513 * You should not hold any locks when calling this function, except
1514 * locks on other vcache entries. If you lock more than one vcache
1515 * entry simultaneously, you should lock them in this order:
1517 * 1. Lock all files first, then directories.
1518 * 2. Within a particular type, lock entries in Fid.Vnode order.
1520 * This locking hierarchy is convenient because it allows locking
1521 * of a parent dir cache entry, given a file (to check its access
1522 * control list). It also allows renames to be handled easily by
1523 * locking directories in a constant order.
1525 * \note NB. NewVCache -> FlushVCache presently (4/10/95) drops the xvcache lock.
1527 * \note Might have a vcache structure already, which must
1528 * already be held by the caller
1531 afs_GetVCache(register struct VenusFid *afid, struct vrequest *areq,
1532 afs_int32 * cached, struct vcache *avc)
1535 afs_int32 code, newvcache = 0;
1536 register struct vcache *tvc;
1540 AFS_STATCNT(afs_GetVCache);
1543 *cached = 0; /* Init just in case */
1545 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1549 ObtainSharedLock(&afs_xvcache, 5);
1551 tvc = afs_FindVCache(afid, &retry, DO_STATS | DO_VLRU | IS_SLOCK);
1553 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1554 ReleaseSharedLock(&afs_xvcache);
1555 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1562 osi_Assert((tvc->f.states & CVInit) == 0);
1563 /* If we are in readdir, return the vnode even if not statd */
1564 if ((tvc->f.states & CStatd) || afs_InReadDir(tvc)) {
1565 ReleaseSharedLock(&afs_xvcache);
1569 UpgradeSToWLock(&afs_xvcache, 21);
1571 /* no cache entry, better grab one */
1572 tvc = afs_NewVCache(afid, NULL);
1575 ConvertWToSLock(&afs_xvcache);
1578 ReleaseSharedLock(&afs_xvcache);
1582 afs_stats_cmperf.vcacheMisses++;
1585 ReleaseSharedLock(&afs_xvcache);
1587 ObtainWriteLock(&tvc->lock, 54);
1589 if (tvc->f.states & CStatd) {
1590 ReleaseWriteLock(&tvc->lock);
1593 #ifdef AFS_DARWIN80_ENV
1594 /* Darwin 8.0 only has bufs in nfs, so we shouldn't have to worry about them.
1597 #if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
1599 * XXX - I really don't like this. Should try to understand better.
1600 * It seems that sometimes, when we get called, we already hold the
1601 * lock on the vnode (e.g., from afs_getattr via afs_VerifyVCache).
1602 * We can't drop the vnode lock, because that could result in a race.
1603 * Sometimes, though, we get here and don't hold the vnode lock.
1604 * I hate code paths that sometimes hold locks and sometimes don't.
1605 * In any event, the dodge we use here is to check whether the vnode
1606 * is locked, and if it isn't, then we gain and drop it around the call
1607 * to vinvalbuf; otherwise, we leave it alone.
1610 struct vnode *vp = AFSTOV(tvc);
1613 #if defined(AFS_DARWIN_ENV)
1614 iheldthelock = VOP_ISLOCKED(vp);
1616 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, current_proc());
1617 /* this is messy. we can call fsync which will try to reobtain this */
1618 if (VTOAFS(vp) == tvc)
1619 ReleaseWriteLock(&tvc->lock);
1620 if (UBCINFOEXISTS(vp)) {
1621 vinvalbuf(vp, V_SAVE, &afs_osi_cred, current_proc(), PINOD, 0);
1623 if (VTOAFS(vp) == tvc)
1624 ObtainWriteLock(&tvc->lock, 954);
1626 VOP_UNLOCK(vp, LK_EXCLUSIVE, current_proc());
1627 #elif defined(AFS_FBSD80_ENV)
1628 iheldthelock = VOP_ISLOCKED(vp);
1629 if (!iheldthelock) {
1630 /* nosleep/sleep lock order reversal */
1631 int glocked = ISAFS_GLOCK();
1634 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
1638 vinvalbuf(vp, V_SAVE, PINOD, 0); /* changed late in 8.0-CURRENT */
1641 #elif defined(AFS_FBSD60_ENV)
1642 iheldthelock = VOP_ISLOCKED(vp, curthread);
1644 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread);
1645 vinvalbuf(vp, V_SAVE, curthread, PINOD, 0);
1647 VOP_UNLOCK(vp, LK_EXCLUSIVE, curthread);
1648 #elif defined(AFS_FBSD_ENV)
1649 iheldthelock = VOP_ISLOCKED(vp, curthread);
1651 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread);
1652 vinvalbuf(vp, V_SAVE, osi_curcred(), curthread, PINOD, 0);
1654 VOP_UNLOCK(vp, LK_EXCLUSIVE, curthread);
1655 #elif defined(AFS_OBSD_ENV)
1656 iheldthelock = VOP_ISLOCKED(vp, curproc);
1658 VOP_LOCK(vp, LK_EXCLUSIVE | LK_RETRY, curproc);
1659 uvm_vnp_uncache(vp);
1661 VOP_UNLOCK(vp, 0, curproc);
1662 #elif defined(AFS_NBSD40_ENV)
1663 iheldthelock = VOP_ISLOCKED(vp);
1664 if (!iheldthelock) {
1665 VOP_LOCK(vp, LK_EXCLUSIVE | LK_RETRY);
1667 uvm_vnp_uncache(vp);
1675 ObtainWriteLock(&afs_xcbhash, 464);
1676 tvc->f.states &= ~CUnique;
1678 afs_DequeueCallback(tvc);
1679 ReleaseWriteLock(&afs_xcbhash);
1681 /* It is always appropriate to throw away all the access rights? */
1682 afs_FreeAllAxs(&(tvc->Access));
1683 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-volume info */
1685 if ((tvp->states & VForeign)) {
1687 tvc->f.states |= CForeign;
1688 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
1689 && (tvp->rootUnique == afid->Fid.Unique)) {
1693 if (tvp->states & VRO)
1694 tvc->f.states |= CRO;
1695 if (tvp->states & VBackup)
1696 tvc->f.states |= CBackup;
1697 /* now copy ".." entry back out of volume structure, if necessary */
1698 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
1700 tvc->mvid = (struct VenusFid *)
1701 osi_AllocSmallSpace(sizeof(struct VenusFid));
1702 *tvc->mvid = tvp->dotdot;
1704 afs_PutVolume(tvp, READ_LOCK);
1708 afs_RemoveVCB(afid);
1710 struct AFSFetchStatus OutStatus;
1712 if (afs_DynrootNewVnode(tvc, &OutStatus)) {
1713 afs_ProcessFS(tvc, &OutStatus, areq);
1714 tvc->f.states |= CStatd | CUnique;
1715 tvc->f.parent.vnode = OutStatus.ParentVnode;
1716 tvc->f.parent.unique = OutStatus.ParentUnique;
1720 if (AFS_IS_DISCONNECTED) {
1721 /* Nothing to do otherwise...*/
1723 /* printf("Network is down in afs_GetCache"); */
1725 code = afs_FetchStatus(tvc, afid, areq, &OutStatus);
1727 /* For the NFS translator's benefit, make sure
1728 * non-directory vnodes always have their parent FID set
1729 * correctly, even when created as a result of decoding an
1730 * NFS filehandle. It would be nice to also do this for
1731 * directories, but we can't because the fileserver fills
1732 * in the FID of the directory itself instead of that of
1735 if (!code && OutStatus.FileType != Directory &&
1736 !tvc->f.parent.vnode) {
1737 tvc->f.parent.vnode = OutStatus.ParentVnode;
1738 tvc->f.parent.unique = OutStatus.ParentUnique;
1739 /* XXX - SXW - It's conceivable we should mark ourselves
1740 * as dirty again here, incase we've been raced
1741 * out of the FetchStatus call.
1748 ReleaseWriteLock(&tvc->lock);
1754 ReleaseWriteLock(&tvc->lock);
1757 } /*afs_GetVCache */
1762 * Lookup a vcache by fid. Look inside the cache first, if not
1763 * there, lookup the file on the server, and then get it's fresh
1768 * \param cached Is element cached? If NULL, don't answer.
1772 * \return The found element or NULL.
1775 afs_LookupVCache(struct VenusFid *afid, struct vrequest *areq,
1776 afs_int32 * cached, struct vcache *adp, char *aname)
1778 afs_int32 code, now, newvcache = 0;
1779 struct VenusFid nfid;
1780 register struct vcache *tvc;
1782 struct AFSFetchStatus OutStatus;
1783 struct AFSCallBack CallBack;
1784 struct AFSVolSync tsync;
1785 struct server *serverp = 0;
1789 AFS_STATCNT(afs_GetVCache);
1791 *cached = 0; /* Init just in case */
1793 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1797 ObtainReadLock(&afs_xvcache);
1798 tvc = afs_FindVCache(afid, &retry, DO_STATS /* no vlru */ );
1801 ReleaseReadLock(&afs_xvcache);
1803 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1804 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1808 ObtainReadLock(&tvc->lock);
1810 if (tvc->f.states & CStatd) {
1814 ReleaseReadLock(&tvc->lock);
1817 tvc->f.states &= ~CUnique;
1819 ReleaseReadLock(&tvc->lock);
1821 ObtainReadLock(&afs_xvcache);
1824 ReleaseReadLock(&afs_xvcache);
1826 /* lookup the file */
1829 origCBs = afs_allCBs; /* if anything changes, we don't have a cb */
1831 if (AFS_IS_DISCONNECTED) {
1832 /* printf("Network is down in afs_LookupVcache\n"); */
1836 afs_RemoteLookup(&adp->f.fid, areq, aname, &nfid, &OutStatus,
1837 &CallBack, &serverp, &tsync);
1839 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1843 ObtainSharedLock(&afs_xvcache, 6);
1844 tvc = afs_FindVCache(&nfid, &retry, DO_VLRU | IS_SLOCK/* no xstats now */ );
1846 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1847 ReleaseSharedLock(&afs_xvcache);
1848 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1854 /* no cache entry, better grab one */
1855 UpgradeSToWLock(&afs_xvcache, 22);
1856 tvc = afs_NewVCache(&nfid, serverp);
1858 ConvertWToSLock(&afs_xvcache);
1861 ReleaseSharedLock(&afs_xvcache);
1866 ReleaseSharedLock(&afs_xvcache);
1867 ObtainWriteLock(&tvc->lock, 55);
1869 /* It is always appropriate to throw away all the access rights? */
1870 afs_FreeAllAxs(&(tvc->Access));
1871 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-vol info */
1873 if ((tvp->states & VForeign)) {
1875 tvc->f.states |= CForeign;
1876 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
1877 && (tvp->rootUnique == afid->Fid.Unique))
1880 if (tvp->states & VRO)
1881 tvc->f.states |= CRO;
1882 if (tvp->states & VBackup)
1883 tvc->f.states |= CBackup;
1884 /* now copy ".." entry back out of volume structure, if necessary */
1885 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
1887 tvc->mvid = (struct VenusFid *)
1888 osi_AllocSmallSpace(sizeof(struct VenusFid));
1889 *tvc->mvid = tvp->dotdot;
1894 ObtainWriteLock(&afs_xcbhash, 465);
1895 afs_DequeueCallback(tvc);
1896 tvc->f.states &= ~(CStatd | CUnique);
1897 ReleaseWriteLock(&afs_xcbhash);
1898 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
1899 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
1901 afs_PutVolume(tvp, READ_LOCK);
1902 ReleaseWriteLock(&tvc->lock);
1907 ObtainWriteLock(&afs_xcbhash, 466);
1908 if (origCBs == afs_allCBs) {
1909 if (CallBack.ExpirationTime) {
1910 tvc->callback = serverp;
1911 tvc->cbExpires = CallBack.ExpirationTime + now;
1912 tvc->f.states |= CStatd | CUnique;
1913 tvc->f.states &= ~CBulkFetching;
1914 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvp);
1915 } else if (tvc->f.states & CRO) {
1916 /* adapt gives us an hour. */
1917 tvc->cbExpires = 3600 + osi_Time();
1918 /*XXX*/ tvc->f.states |= CStatd | CUnique;
1919 tvc->f.states &= ~CBulkFetching;
1920 afs_QueueCallback(tvc, CBHash(3600), tvp);
1922 tvc->callback = NULL;
1923 afs_DequeueCallback(tvc);
1924 tvc->f.states &= ~(CStatd | CUnique);
1925 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
1926 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
1929 afs_DequeueCallback(tvc);
1930 tvc->f.states &= ~CStatd;
1931 tvc->f.states &= ~CUnique;
1932 tvc->callback = NULL;
1933 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
1934 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
1936 ReleaseWriteLock(&afs_xcbhash);
1938 afs_PutVolume(tvp, READ_LOCK);
1939 afs_ProcessFS(tvc, &OutStatus, areq);
1941 ReleaseWriteLock(&tvc->lock);
1947 afs_GetRootVCache(struct VenusFid *afid, struct vrequest *areq,
1948 afs_int32 * cached, struct volume *tvolp)
1950 afs_int32 code = 0, i, newvcache = 0, haveStatus = 0;
1951 afs_int32 getNewFid = 0;
1953 struct VenusFid nfid;
1954 register struct vcache *tvc;
1955 struct server *serverp = 0;
1956 struct AFSFetchStatus OutStatus;
1957 struct AFSCallBack CallBack;
1958 struct AFSVolSync tsync;
1960 #ifdef AFS_DARWIN80_ENV
1967 if (!tvolp->rootVnode || getNewFid) {
1968 struct VenusFid tfid;
1971 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
1972 origCBs = afs_allCBs; /* ignore InitCallBackState */
1974 afs_RemoteLookup(&tfid, areq, NULL, &nfid, &OutStatus, &CallBack,
1979 /* ReleaseReadLock(&tvolp->lock); */
1980 ObtainWriteLock(&tvolp->lock, 56);
1981 tvolp->rootVnode = afid->Fid.Vnode = nfid.Fid.Vnode;
1982 tvolp->rootUnique = afid->Fid.Unique = nfid.Fid.Unique;
1983 ReleaseWriteLock(&tvolp->lock);
1984 /* ObtainReadLock(&tvolp->lock);*/
1987 afid->Fid.Vnode = tvolp->rootVnode;
1988 afid->Fid.Unique = tvolp->rootUnique;
1992 ObtainSharedLock(&afs_xvcache, 7);
1994 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
1995 if (!FidCmp(&(tvc->f.fid), afid)) {
1996 if (tvc->f.states & CVInit) {
1997 ReleaseSharedLock(&afs_xvcache);
1998 afs_osi_Sleep(&tvc->f.states);
2001 #ifdef AFS_DARWIN80_ENV
2002 if (tvc->f.states & CDeadVnode) {
2003 if (!(tvc->f.states & CBulkFetching)) {
2004 ReleaseSharedLock(&afs_xvcache);
2005 afs_osi_Sleep(&tvc->f.states);
2010 if (vnode_get(tvp)) /* this bumps ref count */
2012 if (vnode_ref(tvp)) {
2014 /* AFSTOV(tvc) may be NULL */
2019 if (tvc->f.states & (CBulkFetching|CDeadVnode)) {
2021 vnode_recycle(AFSTOV(tvc));
2029 if (!haveStatus && (!tvc || !(tvc->f.states & CStatd))) {
2030 /* Mount point no longer stat'd or unknown. FID may have changed. */
2032 ReleaseSharedLock(&afs_xvcache);
2033 #ifdef AFS_DARWIN80_ENV
2036 vnode_put(AFSTOV(tvc));
2037 vnode_rele(AFSTOV(tvc));
2046 UpgradeSToWLock(&afs_xvcache, 23);
2047 /* no cache entry, better grab one */
2048 tvc = afs_NewVCache(afid, NULL);
2051 ReleaseWriteLock(&afs_xvcache);
2055 afs_stats_cmperf.vcacheMisses++;
2059 afs_stats_cmperf.vcacheHits++;
2060 #if defined(AFS_DARWIN80_ENV)
2061 /* we already bumped the ref count in the for loop above */
2062 #else /* AFS_DARWIN80_ENV */
2065 UpgradeSToWLock(&afs_xvcache, 24);
2066 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2067 refpanic("GRVC VLRU inconsistent0");
2069 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2070 refpanic("GRVC VLRU inconsistent1");
2072 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2073 refpanic("GRVC VLRU inconsistent2");
2075 QRemove(&tvc->vlruq); /* move to lruq head */
2076 QAdd(&VLRU, &tvc->vlruq);
2077 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2078 refpanic("GRVC VLRU inconsistent3");
2080 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2081 refpanic("GRVC VLRU inconsistent4");
2083 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2084 refpanic("GRVC VLRU inconsistent5");
2089 ReleaseWriteLock(&afs_xvcache);
2091 if (tvc->f.states & CStatd) {
2095 ObtainReadLock(&tvc->lock);
2096 tvc->f.states &= ~CUnique;
2097 tvc->callback = NULL; /* redundant, perhaps */
2098 ReleaseReadLock(&tvc->lock);
2101 ObtainWriteLock(&tvc->lock, 57);
2103 /* It is always appropriate to throw away all the access rights? */
2104 afs_FreeAllAxs(&(tvc->Access));
2107 tvc->f.states |= CForeign;
2108 if (tvolp->states & VRO)
2109 tvc->f.states |= CRO;
2110 if (tvolp->states & VBackup)
2111 tvc->f.states |= CBackup;
2112 /* now copy ".." entry back out of volume structure, if necessary */
2113 if (newvcache && (tvolp->rootVnode == afid->Fid.Vnode)
2114 && (tvolp->rootUnique == afid->Fid.Unique)) {
2117 if (tvc->mvstat == 2 && tvolp->dotdot.Fid.Volume != 0) {
2119 tvc->mvid = (struct VenusFid *)
2120 osi_AllocSmallSpace(sizeof(struct VenusFid));
2121 *tvc->mvid = tvolp->dotdot;
2125 afs_RemoveVCB(afid);
2128 struct VenusFid tfid;
2131 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
2132 origCBs = afs_allCBs; /* ignore InitCallBackState */
2134 afs_RemoteLookup(&tfid, areq, NULL, &nfid, &OutStatus, &CallBack,
2139 ObtainWriteLock(&afs_xcbhash, 467);
2140 afs_DequeueCallback(tvc);
2141 tvc->callback = NULL;
2142 tvc->f.states &= ~(CStatd | CUnique);
2143 ReleaseWriteLock(&afs_xcbhash);
2144 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2145 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2146 ReleaseWriteLock(&tvc->lock);
2151 ObtainWriteLock(&afs_xcbhash, 468);
2152 if (origCBs == afs_allCBs) {
2153 tvc->f.states |= CTruth;
2154 tvc->callback = serverp;
2155 if (CallBack.ExpirationTime != 0) {
2156 tvc->cbExpires = CallBack.ExpirationTime + start;
2157 tvc->f.states |= CStatd;
2158 tvc->f.states &= ~CBulkFetching;
2159 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvolp);
2160 } else if (tvc->f.states & CRO) {
2161 /* adapt gives us an hour. */
2162 tvc->cbExpires = 3600 + osi_Time();
2163 /*XXX*/ tvc->f.states |= CStatd;
2164 tvc->f.states &= ~CBulkFetching;
2165 afs_QueueCallback(tvc, CBHash(3600), tvolp);
2168 afs_DequeueCallback(tvc);
2169 tvc->callback = NULL;
2170 tvc->f.states &= ~(CStatd | CUnique);
2171 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2172 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2174 ReleaseWriteLock(&afs_xcbhash);
2175 afs_ProcessFS(tvc, &OutStatus, areq);
2177 ReleaseWriteLock(&tvc->lock);
2183 * Update callback status and (sometimes) attributes of a vnode.
2184 * Called after doing a fetch status RPC. Whilst disconnected, attributes
2185 * shouldn't be written to the vcache here.
2190 * \param Outsp Server status after rpc call.
2191 * \param acb Callback for this vnode.
2193 * \note The vcache must be write locked.
2196 afs_UpdateStatus(struct vcache *avc, struct VenusFid *afid,
2197 struct vrequest *areq, struct AFSFetchStatus *Outsp,
2198 struct AFSCallBack *acb, afs_uint32 start)
2200 struct volume *volp;
2203 /* Dont write status in vcache if resyncing after a disconnection. */
2204 afs_ProcessFS(avc, Outsp, areq);
2206 volp = afs_GetVolume(afid, areq, READ_LOCK);
2207 ObtainWriteLock(&afs_xcbhash, 469);
2208 avc->f.states |= CTruth;
2209 if (avc->callback /* check for race */ ) {
2210 if (acb->ExpirationTime != 0) {
2211 avc->cbExpires = acb->ExpirationTime + start;
2212 avc->f.states |= CStatd;
2213 avc->f.states &= ~CBulkFetching;
2214 afs_QueueCallback(avc, CBHash(acb->ExpirationTime), volp);
2215 } else if (avc->f.states & CRO) {
2216 /* ordinary callback on a read-only volume -- AFS 3.2 style */
2217 avc->cbExpires = 3600 + start;
2218 avc->f.states |= CStatd;
2219 avc->f.states &= ~CBulkFetching;
2220 afs_QueueCallback(avc, CBHash(3600), volp);
2222 afs_DequeueCallback(avc);
2223 avc->callback = NULL;
2224 avc->f.states &= ~(CStatd | CUnique);
2225 if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
2226 osi_dnlc_purgedp(avc); /* if it (could be) a directory */
2229 afs_DequeueCallback(avc);
2230 avc->callback = NULL;
2231 avc->f.states &= ~(CStatd | CUnique);
2232 if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
2233 osi_dnlc_purgedp(avc); /* if it (could be) a directory */
2235 ReleaseWriteLock(&afs_xcbhash);
2237 afs_PutVolume(volp, READ_LOCK);
2241 * Must be called with avc write-locked
2242 * don't absolutely have to invalidate the hint unless the dv has
2243 * changed, but be sure to get it right else there will be consistency bugs.
2246 afs_FetchStatus(struct vcache * avc, struct VenusFid * afid,
2247 struct vrequest * areq, struct AFSFetchStatus * Outsp)
2250 afs_uint32 start = 0;
2251 register struct afs_conn *tc;
2252 struct AFSCallBack CallBack;
2253 struct AFSVolSync tsync;
2256 tc = afs_Conn(afid, areq, SHARED_LOCK);
2257 avc->dchint = NULL; /* invalidate hints */
2259 avc->callback = tc->srvr->server;
2261 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_FETCHSTATUS);
2264 RXAFS_FetchStatus(tc->id, (struct AFSFid *)&afid->Fid, Outsp,
2272 } while (afs_Analyze
2273 (tc, code, afid, areq, AFS_STATS_FS_RPCIDX_FETCHSTATUS,
2274 SHARED_LOCK, NULL));
2277 afs_UpdateStatus(avc, afid, areq, Outsp, &CallBack, start);
2279 /* used to undo the local callback, but that's too extreme.
2280 * There are plenty of good reasons that fetchstatus might return
2281 * an error, such as EPERM. If we have the vnode cached, statd,
2282 * with callback, might as well keep track of the fact that we
2283 * don't have access...
2285 if (code == EPERM || code == EACCES) {
2286 struct axscache *ac;
2287 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
2289 else /* not found, add a new one if possible */
2290 afs_AddAxs(avc->Access, areq->uid, 0);
2301 * Stuff some information into the vcache for the given file.
2304 * afid : File in question.
2305 * OutStatus : Fetch status on the file.
2306 * CallBack : Callback info.
2307 * tc : RPC connection involved.
2308 * areq : vrequest involved.
2311 * Nothing interesting.
2314 afs_StuffVcache(register struct VenusFid *afid,
2315 struct AFSFetchStatus *OutStatus,
2316 struct AFSCallBack *CallBack, register struct afs_conn *tc,
2317 struct vrequest *areq)
2319 register afs_int32 code, i, newvcache = 0;
2320 register struct vcache *tvc;
2321 struct AFSVolSync tsync;
2323 struct axscache *ac;
2326 AFS_STATCNT(afs_StuffVcache);
2327 #ifdef IFS_VCACHECOUNT
2332 ObtainSharedLock(&afs_xvcache, 8);
2334 tvc = afs_FindVCache(afid, &retry, DO_VLRU| IS_SLOCK /* no stats */ );
2336 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2337 ReleaseSharedLock(&afs_xvcache);
2338 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2344 /* no cache entry, better grab one */
2345 UpgradeSToWLock(&afs_xvcache, 25);
2346 tvc = afs_NewVCache(afid, NULL);
2348 ConvertWToSLock(&afs_xvcache);
2351 ReleaseSharedLock(&afs_xvcache);
2356 ReleaseSharedLock(&afs_xvcache);
2357 ObtainWriteLock(&tvc->lock, 58);
2359 tvc->f.states &= ~CStatd;
2360 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2361 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2363 /* Is it always appropriate to throw away all the access rights? */
2364 afs_FreeAllAxs(&(tvc->Access));
2366 /*Copy useful per-volume info */
2367 tvp = afs_GetVolume(afid, areq, READ_LOCK);
2369 if (newvcache && (tvp->states & VForeign))
2370 tvc->f.states |= CForeign;
2371 if (tvp->states & VRO)
2372 tvc->f.states |= CRO;
2373 if (tvp->states & VBackup)
2374 tvc->f.states |= CBackup;
2376 * Now, copy ".." entry back out of volume structure, if
2379 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
2381 tvc->mvid = (struct VenusFid *)
2382 osi_AllocSmallSpace(sizeof(struct VenusFid));
2383 *tvc->mvid = tvp->dotdot;
2386 /* store the stat on the file */
2387 afs_RemoveVCB(afid);
2388 afs_ProcessFS(tvc, OutStatus, areq);
2389 tvc->callback = tc->srvr->server;
2391 /* we use osi_Time twice below. Ideally, we would use the time at which
2392 * the FetchStatus call began, instead, but we don't have it here. So we
2393 * make do with "now". In the CRO case, it doesn't really matter. In
2394 * the other case, we hope that the difference between "now" and when the
2395 * call actually began execution on the server won't be larger than the
2396 * padding which the server keeps. Subtract 1 second anyway, to be on
2397 * the safe side. Can't subtract more because we don't know how big
2398 * ExpirationTime is. Possible consistency problems may arise if the call
2399 * timeout period becomes longer than the server's expiration padding. */
2400 ObtainWriteLock(&afs_xcbhash, 470);
2401 if (CallBack->ExpirationTime != 0) {
2402 tvc->cbExpires = CallBack->ExpirationTime + osi_Time() - 1;
2403 tvc->f.states |= CStatd;
2404 tvc->f.states &= ~CBulkFetching;
2405 afs_QueueCallback(tvc, CBHash(CallBack->ExpirationTime), tvp);
2406 } else if (tvc->f.states & CRO) {
2407 /* old-fashioned AFS 3.2 style */
2408 tvc->cbExpires = 3600 + osi_Time();
2409 /*XXX*/ tvc->f.states |= CStatd;
2410 tvc->f.states &= ~CBulkFetching;
2411 afs_QueueCallback(tvc, CBHash(3600), tvp);
2413 afs_DequeueCallback(tvc);
2414 tvc->callback = NULL;
2415 tvc->f.states &= ~(CStatd | CUnique);
2416 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2417 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2419 ReleaseWriteLock(&afs_xcbhash);
2421 afs_PutVolume(tvp, READ_LOCK);
2423 /* look in per-pag cache */
2424 if (tvc->Access && (ac = afs_FindAxs(tvc->Access, areq->uid)))
2425 ac->axess = OutStatus->CallerAccess; /* substitute pags */
2426 else /* not found, add a new one if possible */
2427 afs_AddAxs(tvc->Access, areq->uid, OutStatus->CallerAccess);
2429 ReleaseWriteLock(&tvc->lock);
2430 afs_Trace4(afs_iclSetp, CM_TRACE_STUFFVCACHE, ICL_TYPE_POINTER, tvc,
2431 ICL_TYPE_POINTER, tvc->callback, ICL_TYPE_INT32,
2432 tvc->cbExpires, ICL_TYPE_INT32, tvc->cbExpires - osi_Time());
2434 * Release ref count... hope this guy stays around...
2437 } /*afs_StuffVcache */
2441 * Decrements the reference count on a cache entry.
2443 * \param avc Pointer to the cache entry to decrement.
2445 * \note Environment: Nothing interesting.
2448 afs_PutVCache(register struct vcache *avc)
2450 AFS_STATCNT(afs_PutVCache);
2451 #ifdef AFS_DARWIN80_ENV
2452 vnode_put(AFSTOV(avc));
2456 * Can we use a read lock here?
2458 ObtainReadLock(&afs_xvcache);
2460 ReleaseReadLock(&afs_xvcache);
2462 } /*afs_PutVCache */
2466 * Reset a vcache entry, so local contents are ignored, and the
2467 * server will be reconsulted next time the vcache is used
2469 * \param avc Pointer to the cache entry to reset
2472 * \note avc must be write locked on entry
2475 afs_ResetVCache(struct vcache *avc, afs_ucred_t *acred)
2477 ObtainWriteLock(&afs_xcbhash, 456);
2478 afs_DequeueCallback(avc);
2479 avc->f.states &= ~(CStatd | CDirty); /* next reference will re-stat */
2480 ReleaseWriteLock(&afs_xcbhash);
2481 /* now find the disk cache entries */
2482 afs_TryToSmush(avc, acred, 1);
2483 osi_dnlc_purgedp(avc);
2484 if (avc->linkData && !(avc->f.states & CCore)) {
2485 afs_osi_Free(avc->linkData, strlen(avc->linkData) + 1);
2486 avc->linkData = NULL;
2491 * Sleepa when searching for a vcache. Releases all the pending locks,
2492 * sleeps then obtains the previously released locks.
2494 * \param vcache Enter sleep state.
2495 * \param flag Determines what locks to use.
2500 findvc_sleep(struct vcache *avc, int flag)
2502 int fstates = avc->f.states;
2503 if (flag & IS_SLOCK) {
2504 ReleaseSharedLock(&afs_xvcache);
2506 if (flag & IS_WLOCK) {
2507 ReleaseWriteLock(&afs_xvcache);
2509 ReleaseReadLock(&afs_xvcache);
2512 if (flag & FIND_CDEAD) {
2513 ObtainWriteLock(&afs_xvcache, 342);
2514 afs_FlushReclaimedVcaches();
2515 if (fstates == avc->f.states) {
2516 ReleaseWriteLock(&afs_xvcache);
2517 afs_osi_Sleep(&avc->f.states);
2519 ReleaseWriteLock(&afs_xvcache);
2521 afs_osi_Sleep(&avc->f.states);
2522 if (flag & IS_SLOCK) {
2523 ObtainSharedLock(&afs_xvcache, 341);
2525 if (flag & IS_WLOCK) {
2526 ObtainWriteLock(&afs_xvcache, 343);
2528 ObtainReadLock(&afs_xvcache);
2533 * Find a vcache entry given a fid.
2535 * \param afid Pointer to the fid whose cache entry we desire.
2536 * \param retry (SGI-specific) tell the caller to drop the lock on xvcache,
2537 * unlock the vnode, and try again.
2538 * \param flag Bit 1 to specify whether to compute hit statistics. Not
2539 * set if FindVCache is called as part of internal bookkeeping.
2541 * \note Environment: Must be called with the afs_xvcache lock at least held at
2542 * the read level. In order to do the VLRU adjustment, the xvcache lock
2543 * must be shared-- we upgrade it here.
2547 afs_FindVCache(struct VenusFid *afid, afs_int32 * retry, afs_int32 flag)
2550 register struct vcache *tvc;
2552 #ifdef AFS_DARWIN80_ENV
2556 AFS_STATCNT(afs_FindVCache);
2560 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2561 if (FidMatches(afid, tvc)) {
2562 if (tvc->f.states & CVInit) {
2563 findvc_sleep(tvc, flag);
2566 #ifdef AFS_DARWIN80_ENV
2567 if (tvc->f.states & CDeadVnode) {
2568 if (!(flag & FIND_CDEAD)) {
2569 findvc_sleep(tvc, flag);
2576 if (vnode_ref(tvp)) {
2578 /* AFSTOV(tvc) may be NULL */
2583 if (tvc->f.states & (CBulkFetching|CDeadVnode)) {
2585 vnode_recycle(AFSTOV(tvc));
2593 /* should I have a read lock on the vnode here? */
2597 #if !defined(AFS_DARWIN80_ENV)
2598 osi_vnhold(tvc, retry); /* already held, above */
2599 if (retry && *retry)
2602 #if defined(AFS_DARWIN_ENV) && !defined(AFS_DARWIN80_ENV)
2603 tvc->f.states |= CUBCinit;
2605 if (UBCINFOMISSING(AFSTOV(tvc)) ||
2606 UBCINFORECLAIMED(AFSTOV(tvc))) {
2607 ubc_info_init(AFSTOV(tvc));
2610 tvc->f.states &= ~CUBCinit;
2613 * only move to front of vlru if we have proper vcache locking)
2615 if (flag & DO_VLRU) {
2616 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2617 refpanic("FindVC VLRU inconsistent1");
2619 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2620 refpanic("FindVC VLRU inconsistent1");
2622 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2623 refpanic("FindVC VLRU inconsistent2");
2625 UpgradeSToWLock(&afs_xvcache, 26);
2626 QRemove(&tvc->vlruq);
2627 QAdd(&VLRU, &tvc->vlruq);
2628 ConvertWToSLock(&afs_xvcache);
2629 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2630 refpanic("FindVC VLRU inconsistent1");
2632 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2633 refpanic("FindVC VLRU inconsistent2");
2635 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2636 refpanic("FindVC VLRU inconsistent3");
2642 if (flag & DO_STATS) {
2644 afs_stats_cmperf.vcacheHits++;
2646 afs_stats_cmperf.vcacheMisses++;
2647 if (afs_IsPrimaryCellNum(afid->Cell))
2648 afs_stats_cmperf.vlocalAccesses++;
2650 afs_stats_cmperf.vremoteAccesses++;
2653 } /*afs_FindVCache */
2656 * Find a vcache entry given a fid. Does a wildcard match on what we
2657 * have for the fid. If more than one entry, don't return anything.
2659 * \param avcp Fill in pointer if we found one and only one.
2660 * \param afid Pointer to the fid whose cache entry we desire.
2661 * \param retry (SGI-specific) tell the caller to drop the lock on xvcache,
2662 * unlock the vnode, and try again.
2663 * \param flags bit 1 to specify whether to compute hit statistics. Not
2664 * set if FindVCache is called as part of internal bookkeeping.
2666 * \note Environment: Must be called with the afs_xvcache lock at least held at
2667 * the read level. In order to do the VLRU adjustment, the xvcache lock
2668 * must be shared-- we upgrade it here.
2670 * \return Number of matches found.
2673 int afs_duplicate_nfs_fids = 0;
2676 afs_NFSFindVCache(struct vcache **avcp, struct VenusFid *afid)
2678 register struct vcache *tvc;
2680 afs_int32 count = 0;
2681 struct vcache *found_tvc = NULL;
2682 #ifdef AFS_DARWIN80_ENV
2686 AFS_STATCNT(afs_FindVCache);
2690 ObtainSharedLock(&afs_xvcache, 331);
2693 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2694 /* Match only on what we have.... */
2695 if (((tvc->f.fid.Fid.Vnode & 0xffff) == afid->Fid.Vnode)
2696 && (tvc->f.fid.Fid.Volume == afid->Fid.Volume)
2697 && ((tvc->f.fid.Fid.Unique & 0xffffff) == afid->Fid.Unique)
2698 && (tvc->f.fid.Cell == afid->Cell)) {
2699 if (tvc->f.states & CVInit) {
2700 ReleaseSharedLock(&afs_xvcache);
2701 afs_osi_Sleep(&tvc->f.states);
2704 #ifdef AFS_DARWIN80_ENV
2705 if (tvc->f.states & CDeadVnode) {
2706 if (!(tvc->f.states & CBulkFetching)) {
2707 ReleaseSharedLock(&afs_xvcache);
2708 afs_osi_Sleep(&tvc->f.states);
2713 if (vnode_get(tvp)) {
2714 /* This vnode no longer exists. */
2717 if (vnode_ref(tvp)) {
2718 /* This vnode no longer exists. */
2720 /* AFSTOV(tvc) may be NULL */
2725 if (tvc->f.states & (CBulkFetching|CDeadVnode)) {
2727 vnode_recycle(AFSTOV(tvc));
2730 #endif /* AFS_DARWIN80_ENV */
2734 afs_duplicate_nfs_fids++;
2735 ReleaseSharedLock(&afs_xvcache);
2736 #ifdef AFS_DARWIN80_ENV
2737 /* Drop our reference counts. */
2738 vnode_put(AFSTOV(tvc));
2739 vnode_put(AFSTOV(found_tvc));
2748 /* should I have a read lock on the vnode here? */
2750 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2751 afs_int32 retry = 0;
2752 osi_vnhold(tvc, &retry);
2755 found_tvc = (struct vcache *)0;
2756 ReleaseSharedLock(&afs_xvcache);
2757 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2761 osi_vnhold(tvc, (int *)0); /* already held, above */
2764 * We obtained the xvcache lock above.
2766 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2767 refpanic("FindVC VLRU inconsistent1");
2769 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2770 refpanic("FindVC VLRU inconsistent1");
2772 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2773 refpanic("FindVC VLRU inconsistent2");
2775 UpgradeSToWLock(&afs_xvcache, 568);
2776 QRemove(&tvc->vlruq);
2777 QAdd(&VLRU, &tvc->vlruq);
2778 ConvertWToSLock(&afs_xvcache);
2779 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2780 refpanic("FindVC VLRU inconsistent1");
2782 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2783 refpanic("FindVC VLRU inconsistent2");
2785 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2786 refpanic("FindVC VLRU inconsistent3");
2792 afs_stats_cmperf.vcacheHits++;
2794 afs_stats_cmperf.vcacheMisses++;
2795 if (afs_IsPrimaryCellNum(afid->Cell))
2796 afs_stats_cmperf.vlocalAccesses++;
2798 afs_stats_cmperf.vremoteAccesses++;
2800 *avcp = tvc; /* May be null */
2802 ReleaseSharedLock(&afs_xvcache);
2803 return (tvc ? 1 : 0);
2805 } /*afs_NFSFindVCache */
2811 * Initialize vcache related variables
2816 afs_vcacheInit(int astatSize)
2818 #if !defined(AFS_LINUX22_ENV)
2819 register struct vcache *tvp;
2822 if (!afs_maxvcount) {
2823 afs_maxvcount = astatSize; /* no particular limit on linux? */
2825 #if !defined(AFS_LINUX22_ENV)
2829 AFS_RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
2830 LOCK_INIT(&afs_xvcb, "afs_xvcb");
2832 #if !defined(AFS_LINUX22_ENV)
2833 /* Allocate and thread the struct vcache entries */
2834 tvp = (struct vcache *)afs_osi_Alloc(astatSize * sizeof(struct vcache));
2835 memset(tvp, 0, sizeof(struct vcache) * astatSize);
2837 Initial_freeVCList = tvp;
2838 freeVCList = &(tvp[0]);
2839 for (i = 0; i < astatSize - 1; i++) {
2840 tvp[i].nextfree = &(tvp[i + 1]);
2842 tvp[astatSize - 1].nextfree = NULL;
2843 # ifdef KERNEL_HAVE_PIN
2844 pin((char *)tvp, astatSize * sizeof(struct vcache)); /* XXX */
2848 #if defined(AFS_SGI_ENV)
2849 for (i = 0; i < astatSize; i++) {
2850 char name[METER_NAMSZ];
2851 struct vcache *tvc = &tvp[i];
2853 tvc->v.v_number = ++afsvnumbers;
2854 tvc->vc_rwlockid = OSI_NO_LOCKID;
2855 initnsema(&tvc->vc_rwlock, 1,
2856 makesname(name, "vrw", tvc->v.v_number));
2857 #ifndef AFS_SGI53_ENV
2858 initnsema(&tvc->v.v_sync, 0, makesname(name, "vsy", tvc->v.v_number));
2860 #ifndef AFS_SGI62_ENV
2861 initnlock(&tvc->v.v_lock, makesname(name, "vlk", tvc->v.v_number));
2862 #endif /* AFS_SGI62_ENV */
2866 for(i = 0; i < VCSIZE; ++i)
2867 QInit(&afs_vhashTV[i]);
2874 shutdown_vcache(void)
2877 struct afs_cbr *tsp;
2879 * XXX We may potentially miss some of the vcaches because if when
2880 * there are no free vcache entries and all the vcache entries are active
2881 * ones then we allocate an additional one - admittedly we almost never
2886 register struct afs_q *tq, *uq = NULL;
2887 register struct vcache *tvc;
2888 for (tq = VLRU.prev; tq != &VLRU; tq = uq) {
2892 osi_FreeSmallSpace(tvc->mvid);
2893 tvc->mvid = (struct VenusFid *)0;
2896 aix_gnode_rele(AFSTOV(tvc));
2898 if (tvc->linkData) {
2899 afs_osi_Free(tvc->linkData, strlen(tvc->linkData) + 1);
2904 * Also free the remaining ones in the Cache
2906 for (i = 0; i < VCSIZE; i++) {
2907 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2909 osi_FreeSmallSpace(tvc->mvid);
2910 tvc->mvid = (struct VenusFid *)0;
2914 afs_osi_Free(tvc->v.v_gnode, sizeof(struct gnode));
2915 #ifdef AFS_AIX32_ENV
2918 vms_delete(tvc->segid);
2920 tvc->segid = tvc->vmh = NULL;
2921 if (VREFCOUNT_GT(tvc,0))
2922 osi_Panic("flushVcache: vm race");
2930 #if defined(AFS_SUN5_ENV)
2936 if (tvc->linkData) {
2937 afs_osi_Free(tvc->linkData, strlen(tvc->linkData) + 1);
2942 afs_FreeAllAxs(&(tvc->Access));
2948 * Free any leftover callback queue
2950 for (i = 0; i < afs_stats_cmperf.CallBackAlloced; i++) {
2951 tsp = afs_cbrHeads[i];
2952 afs_cbrHeads[i] = 0;
2953 afs_osi_Free((char *)tsp, AFS_NCBRS * sizeof(struct afs_cbr));
2957 #if !defined(AFS_LINUX22_ENV)
2958 afs_osi_Free(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
2960 # ifdef KERNEL_HAVE_PIN
2961 unpin(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
2964 freeVCList = Initial_freeVCList = 0;
2967 AFS_RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
2968 LOCK_INIT(&afs_xvcb, "afs_xvcb");
2970 for(i = 0; i < VCSIZE; ++i)
2971 QInit(&afs_vhashTV[i]);
2975 afs_DisconGiveUpCallbacks(void)
2981 ObtainWriteLock(&afs_xvcache, 1002); /* XXX - should be a unique number */
2983 /* Somehow, walk the set of vcaches, with each one coming out as tvc */
2984 for (i = 0; i < VCSIZE; i++) {
2985 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2986 if (afs_QueueVCB(tvc)) {
2987 tvc->callback = NULL;
2993 ReleaseWriteLock(&afs_xvcache);
3000 * Clear the Statd flag from all vcaches
3002 * This function removes the Statd flag from all vcaches. It's used by
3003 * disconnected mode to tidy up during reconnection
3007 afs_ClearAllStatdFlag(void)
3012 ObtainWriteLock(&afs_xvcache, 715);
3014 for (i = 0; i < VCSIZE; i++) {
3015 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
3016 tvc->f.states &= ~(CStatd|CUnique);
3019 ReleaseWriteLock(&afs_xvcache);