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 */
62 afs_rwlock_t afs_xvcdirty; /*Lock: discon vcache dirty list mgmt */
64 afs_rwlock_t afs_xvcache; /*Lock: alloc new stat cache entries */
65 afs_rwlock_t afs_xvreclaim; /*Lock: entries reclaimed, not on free list */
66 afs_lock_t afs_xvcb; /*Lock: fids on which there are callbacks */
67 #if !defined(AFS_LINUX22_ENV)
68 static struct vcache *freeVCList; /*Free list for stat cache entries */
69 struct vcache *ReclaimedVCList; /*Reclaimed list for stat entries */
70 static struct vcache *Initial_freeVCList; /*Initial list for above */
72 struct afs_q VLRU; /*vcache LRU */
73 afs_int32 vcachegen = 0;
74 unsigned int afs_paniconwarn = 0;
75 struct vcache *afs_vhashT[VCSIZE];
76 struct afs_q afs_vhashTV[VCSIZE];
77 static struct afs_cbr *afs_cbrHashT[CBRSIZE];
78 afs_int32 afs_bulkStatsLost;
79 int afs_norefpanic = 0;
82 /* Disk backed vcache definitions
83 * Both protected by xvcache */
85 static int afs_nextVcacheSlot = 0;
86 static struct afs_slotlist *afs_freeSlotList = NULL;
89 /* Forward declarations */
90 static afs_int32 afs_QueueVCB(struct vcache *avc);
93 * Generate an index into the hash table for a given Fid.
95 * \return The hash value.
98 afs_HashCBRFid(struct AFSFid *fid)
100 return (fid->Volume + fid->Vnode + fid->Unique) % CBRSIZE;
104 * Insert a CBR entry into the hash table.
105 * Must be called with afs_xvcb held.
110 afs_InsertHashCBR(struct afs_cbr *cbr)
112 int slot = afs_HashCBRFid(&cbr->fid);
114 cbr->hash_next = afs_cbrHashT[slot];
115 if (afs_cbrHashT[slot])
116 afs_cbrHashT[slot]->hash_pprev = &cbr->hash_next;
118 cbr->hash_pprev = &afs_cbrHashT[slot];
119 afs_cbrHashT[slot] = cbr;
124 * Flush the given vcache entry.
127 * afs_xvcache lock must be held for writing upon entry to
128 * prevent people from changing the vrefCount field, and to
129 * protect the lruq and hnext fields.
130 * LOCK: afs_FlushVCache afs_xvcache W
131 * REFCNT: vcache ref count must be zero on entry except for osf1
132 * RACE: lock is dropped and reobtained, permitting race in caller
134 * \param avc Pointer to vcache entry to flush.
135 * \param slept Pointer to int to set 1 if we sleep/drop locks, 0 if we don't.
139 afs_FlushVCache(struct vcache *avc, int *slept)
140 { /*afs_FlushVCache */
143 struct vcache **uvc, *wvc;
146 AFS_STATCNT(afs_FlushVCache);
147 afs_Trace2(afs_iclSetp, CM_TRACE_FLUSHV, ICL_TYPE_POINTER, avc,
148 ICL_TYPE_INT32, avc->f.states);
150 code = osi_VM_FlushVCache(avc, slept);
154 if (avc->f.states & CVFlushed) {
158 #if !defined(AFS_LINUX22_ENV)
159 if (avc->nextfree || !avc->vlruq.prev || !avc->vlruq.next) { /* qv afs.h */
160 refpanic("LRU vs. Free inconsistency");
163 avc->f.states |= CVFlushed;
164 /* pull the entry out of the lruq and put it on the free list */
165 QRemove(&avc->vlruq);
167 /* keep track of # of files that we bulk stat'd, but never used
168 * before they got recycled.
170 if (avc->f.states & CBulkStat)
173 /* remove entry from the hash chain */
174 i = VCHash(&avc->f.fid);
175 uvc = &afs_vhashT[i];
176 for (wvc = *uvc; wvc; uvc = &wvc->hnext, wvc = *uvc) {
179 avc->hnext = (struct vcache *)NULL;
184 /* remove entry from the volume hash table */
185 QRemove(&avc->vhashq);
188 osi_FreeSmallSpace(avc->mvid);
189 avc->mvid = (struct VenusFid *)0;
191 afs_osi_Free(avc->linkData, strlen(avc->linkData) + 1);
192 avc->linkData = NULL;
194 #if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV)
195 /* OK, there are no internal vrefCounts, so there shouldn't
196 * be any more refs here. */
198 #ifdef AFS_DARWIN80_ENV
199 vnode_clearfsnode(AFSTOV(avc));
200 vnode_removefsref(AFSTOV(avc));
202 avc->v->v_data = NULL; /* remove from vnode */
204 AFSTOV(avc) = NULL; /* also drop the ptr to vnode */
207 #ifdef AFS_SUN510_ENV
208 /* As we use private vnodes, cleanup is up to us */
209 vn_reinit(AFSTOV(avc));
211 afs_FreeAllAxs(&(avc->Access));
213 ObtainWriteLock(&afs_xcbhash, 460);
214 afs_DequeueCallback(avc); /* remove it from queued callbacks list */
215 avc->f.states &= ~(CStatd | CUnique);
216 ReleaseWriteLock(&afs_xcbhash);
217 if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
218 osi_dnlc_purgedp(avc); /* if it (could be) a directory */
220 osi_dnlc_purgevp(avc);
223 * Next, keep track of which vnodes we've deleted for create's
224 * optimistic synchronization algorithm
227 if (avc->f.fid.Fid.Vnode & 1)
233 #if !defined(AFS_LINUX22_ENV)
234 /* put the entry in the free list */
235 avc->nextfree = freeVCList;
237 if (avc->vlruq.prev || avc->vlruq.next) {
238 refpanic("LRU vs. Free inconsistency");
240 avc->f.states |= CVFlushed;
242 /* This should put it back on the vnode free list since usecount is 1 */
244 if (VREFCOUNT_GT(avc,0)) {
245 AFS_RELE(AFSTOV(avc));
246 afs_stats_cmperf.vcacheXAllocs--;
248 if (afs_norefpanic) {
249 afs_warn("flush vc refcnt < 1");
252 osi_Panic("flush vc refcnt < 1");
254 #endif /* AFS_LINUX22_ENV */
259 } /*afs_FlushVCache */
263 * The core of the inactive vnode op for all but IRIX.
269 afs_InactiveVCache(struct vcache *avc, afs_ucred_t *acred)
271 AFS_STATCNT(afs_inactive);
272 if (avc->f.states & CDirty) {
273 /* we can't keep trying to push back dirty data forever. Give up. */
274 afs_InvalidateAllSegments(avc); /* turns off dirty bit */
276 avc->f.states &= ~CMAPPED; /* mainly used by SunOS 4.0.x */
277 avc->f.states &= ~CDirty; /* Turn it off */
278 if (avc->f.states & CUnlinked) {
279 if (CheckLock(&afs_xvcache) || CheckLock(&afs_xdcache)) {
280 avc->f.states |= CUnlinkedDel;
283 afs_remunlink(avc, 1); /* ignore any return code */
290 * Allocate a callback return structure from the
291 * free list and return it.
293 * Environment: The alloc and free routines are both called with the afs_xvcb lock
294 * held, so we don't have to worry about blocking in osi_Alloc.
296 * \return The allocated afs_cbr.
298 static struct afs_cbr *afs_cbrSpace = 0;
299 /* if alloc limit below changes, fix me! */
300 static struct afs_cbr *afs_cbrHeads[2];
304 register struct afs_cbr *tsp;
307 while (!afs_cbrSpace) {
308 if (afs_stats_cmperf.CallBackAlloced >= 2) {
309 /* don't allocate more than 2 * AFS_NCBRS for now */
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];
320 tsp[AFS_NCBRS - 1].next = 0;
322 afs_cbrHeads[afs_stats_cmperf.CallBackAlloced] = tsp;
323 afs_stats_cmperf.CallBackAlloced++;
327 afs_cbrSpace = tsp->next;
332 * Free a callback return structure, removing it from all lists.
334 * Environment: the xvcb lock is held over these calls.
336 * \param asp The address of the structure to free.
341 afs_FreeCBR(register struct afs_cbr *asp)
343 *(asp->pprev) = asp->next;
345 asp->next->pprev = asp->pprev;
347 *(asp->hash_pprev) = asp->hash_next;
349 asp->hash_next->hash_pprev = asp->hash_pprev;
351 asp->next = afs_cbrSpace;
357 * Flush all queued callbacks to all servers.
359 * Environment: holds xvcb lock over RPC to guard against race conditions
360 * when a new callback is granted for the same file later on.
362 * \return 0 for success.
365 afs_FlushVCBs(afs_int32 lockit)
367 struct AFSFid *tfids;
368 struct AFSCallBack callBacks[1];
369 struct AFSCBFids fidArray;
370 struct AFSCBs cbArray;
372 struct afs_cbr *tcbrp;
376 struct vrequest treq;
378 int safety1, safety2, safety3;
380 if ((code = afs_InitReq(&treq, afs_osi_credp)))
382 treq.flags |= O_NONBLOCK;
383 tfids = afs_osi_Alloc(sizeof(struct AFSFid) * AFS_MAXCBRSCALL);
386 ObtainWriteLock(&afs_xvcb, 273);
387 ObtainReadLock(&afs_xserver);
388 for (i = 0; i < NSERVERS; i++) {
389 for (safety1 = 0, tsp = afs_servers[i];
390 tsp && safety1 < afs_totalServers + 10;
391 tsp = tsp->next, safety1++) {
393 if (tsp->cbrs == (struct afs_cbr *)0)
396 /* otherwise, grab a block of AFS_MAXCBRSCALL from the list
397 * and make an RPC, over and over again.
399 tcount = 0; /* number found so far */
400 for (safety2 = 0; safety2 < afs_cacheStats; safety2++) {
401 if (tcount >= AFS_MAXCBRSCALL || !tsp->cbrs) {
402 /* if buffer is full, or we've queued all we're going
403 * to from this server, we should flush out the
406 fidArray.AFSCBFids_len = tcount;
407 fidArray.AFSCBFids_val = (struct AFSFid *)tfids;
408 cbArray.AFSCBs_len = 1;
409 cbArray.AFSCBs_val = callBacks;
410 memset(&callBacks[0], 0, sizeof(callBacks[0]));
411 callBacks[0].CallBackType = CB_EXCLUSIVE;
412 for (safety3 = 0; safety3 < AFS_MAXHOSTS * 2; safety3++) {
413 tc = afs_ConnByHost(tsp, tsp->cell->fsport,
414 tsp->cell->cellNum, &treq, 0,
418 (AFS_STATS_FS_RPCIDX_GIVEUPCALLBACKS);
421 RXAFS_GiveUpCallBacks(tc->id, &fidArray,
429 AFS_STATS_FS_RPCIDX_GIVEUPCALLBACKS, SHARED_LOCK,
434 /* ignore return code, since callbacks may have
435 * been returned anyway, we shouldn't leave them
436 * around to be returned again.
438 * Next, see if we are done with this server, and if so,
439 * break to deal with the next one.
445 /* if to flush full buffer */
446 /* if we make it here, we have an entry at the head of cbrs,
447 * which we should copy to the file ID array and then free.
450 tfids[tcount++] = tcbrp->fid;
452 /* Freeing the CBR will unlink it from the server's CBR list */
454 } /* while loop for this one server */
455 if (safety2 > afs_cacheStats) {
456 afs_warn("possible internal error afs_flushVCBs (%d)\n",
459 } /* for loop for this hash chain */
460 } /* loop through all hash chains */
461 if (safety1 > afs_totalServers + 2) {
463 ("AFS internal error (afs_flushVCBs) (%d > %d), continuing...\n",
464 safety1, afs_totalServers + 2);
466 osi_Panic("afs_flushVCBS safety1");
469 ReleaseReadLock(&afs_xserver);
471 ReleaseWriteLock(&afs_xvcb);
472 afs_osi_Free(tfids, sizeof(struct AFSFid) * AFS_MAXCBRSCALL);
477 * Queue a callback on the given fid.
480 * Locks the xvcb lock.
481 * Called when the xvcache lock is already held.
483 * \param avc vcache entry
484 * \return 1 if queued, 0 otherwise
488 afs_QueueVCB(struct vcache *avc)
492 struct afs_cbr *tcbp;
494 AFS_STATCNT(afs_QueueVCB);
496 ObtainWriteLock(&afs_xvcb, 274);
498 /* we can't really give back callbacks on RO files, since the
499 * server only tracks them on a per-volume basis, and we don't
500 * know whether we still have some other files from the same
502 if (!((avc->f.states & CRO) == 0 && avc->callback)) {
506 /* The callback is really just a struct server ptr. */
507 tsp = (struct server *)(avc->callback);
509 /* we now have a pointer to the server, so we just allocate
510 * a queue entry and queue it.
512 tcbp = afs_AllocCBR();
513 tcbp->fid = avc->f.fid.Fid;
515 tcbp->next = tsp->cbrs;
517 tsp->cbrs->pprev = &tcbp->next;
520 tcbp->pprev = &tsp->cbrs;
522 afs_InsertHashCBR(tcbp);
526 /* now release locks and return */
527 ReleaseWriteLock(&afs_xvcb);
533 * Remove a queued callback for a given Fid.
536 * Locks xvcb and xserver locks.
537 * Typically called with xdcache, xvcache and/or individual vcache
540 * \param afid The fid we want cleansed of queued callbacks.
545 afs_RemoveVCB(struct VenusFid *afid)
548 struct afs_cbr *cbr, *ncbr;
550 AFS_STATCNT(afs_RemoveVCB);
551 ObtainWriteLock(&afs_xvcb, 275);
553 slot = afs_HashCBRFid(&afid->Fid);
554 ncbr = afs_cbrHashT[slot];
558 ncbr = cbr->hash_next;
560 if (afid->Fid.Volume == cbr->fid.Volume &&
561 afid->Fid.Vnode == cbr->fid.Vnode &&
562 afid->Fid.Unique == cbr->fid.Unique) {
567 ReleaseWriteLock(&afs_xvcb);
571 afs_FlushReclaimedVcaches(void)
573 #if !defined(AFS_LINUX22_ENV)
576 struct vcache *tmpReclaimedVCList = NULL;
578 ObtainWriteLock(&afs_xvreclaim, 76);
579 while (ReclaimedVCList) {
580 tvc = ReclaimedVCList; /* take from free list */
581 ReclaimedVCList = tvc->nextfree;
582 tvc->nextfree = NULL;
583 code = afs_FlushVCache(tvc, &fv_slept);
585 /* Ok, so, if we got code != 0, uh, wtf do we do? */
586 /* Probably, build a temporary list and then put all back when we
587 get to the end of the list */
588 /* This is actually really crappy, but we need to not leak these.
589 We probably need a way to be smarter about this. */
590 tvc->nextfree = tmpReclaimedVCList;
591 tmpReclaimedVCList = tvc;
592 /* printf("Reclaim list flush %lx failed: %d\n", (unsigned long) tvc, code); */
594 if (tvc->f.states & (CVInit
595 #ifdef AFS_DARWIN80_ENV
599 tvc->f.states &= ~(CVInit
600 #ifdef AFS_DARWIN80_ENV
604 afs_osi_Wakeup(&tvc->f.states);
607 if (tmpReclaimedVCList)
608 ReclaimedVCList = tmpReclaimedVCList;
610 ReleaseWriteLock(&afs_xvreclaim);
615 afs_PostPopulateVCache(struct vcache *avc, struct VenusFid *afid, int seq)
618 * The proper value for mvstat (for root fids) is setup by the caller.
621 if (afid->Fid.Vnode == 1 && afid->Fid.Unique == 1)
624 if (afs_globalVFS == 0)
625 osi_Panic("afs globalvfs");
627 osi_PostPopulateVCache(avc);
630 osi_dnlc_purgedp(avc); /* this may be overkill */
631 memset(&(avc->callsort), 0, sizeof(struct afs_q));
633 avc->f.states &=~ CVInit;
635 avc->f.states |= CBulkFetching;
636 avc->f.m.Length = seq;
638 afs_osi_Wakeup(&avc->f.states);
642 afs_ShakeLooseVCaches(afs_int32 anumber)
646 struct afs_q *tq, *uq;
648 afs_int32 target = anumber;
652 for (tq = VLRU.prev; tq != &VLRU && anumber > 0; tq = uq) {
655 if (tvc->f.states & CVFlushed) {
656 refpanic("CVFlushed on VLRU");
657 /* In the other path, this was 2 * afs_cacheStats */
658 } else if (!afsd_dynamic_vcaches && i++ > afs_maxvcount) {
659 refpanic("Exceeded pool of AFS vnodes(VLRU cycle?)");
660 } else if (QNext(uq) != tq) {
661 refpanic("VLRU inconsistent");
665 if (osi_TryEvictVCache(tvc, &fv_slept))
673 continue; /* start over - may have raced. */
678 if (!afsd_dynamic_vcaches && anumber == target) {
679 afs_warn("afs_ShakeLooseVCaches: warning none freed, using %d of %d\n",
680 afs_vcount, afs_maxvcount);
686 /* Alloc new vnode. */
688 static struct vcache *
689 afs_AllocVCache(void)
693 tvc = osi_NewVnode();
698 if (afsd_dynamic_vcaches && afs_maxvcount < afs_vcount) {
699 afs_maxvcount = afs_vcount;
700 /*printf("peak vnodes: %d\n", afs_maxvcount);*/
703 afs_stats_cmperf.vcacheXAllocs++; /* count in case we have a leak */
705 #ifdef AFS_DISCON_ENV
706 /* If we create a new inode, we either give it a new slot number,
707 * or if one's available, use a slot number from the slot free list
709 if (afs_freeSlotList != NULL) {
710 struct afs_slotlist *tmp;
712 tvc->diskSlot = afs_freeSlotList->slot;
713 tmp = afs_freeSlotList;
714 afs_freeSlotList = tmp->next;
715 afs_osi_Free(tmp, sizeof(struct afs_slotlist));
717 tvc->diskSlot = afs_nextVcacheSlot++;
724 /* Pre populate a newly allocated vcache. On platforms where the actual
725 * vnode is attached to the vcache, this function is called before attachment,
726 * therefore it cannot perform any actions on the vnode itself */
729 afs_PrePopulateVCache(struct vcache *avc, struct VenusFid *afid,
730 struct server *serverp) {
732 #if defined(AFS_DISCON_ENV)
734 slot = avc->diskSlot;
737 osi_PrePopulateVCache(avc);
739 #if defined(AFS_DISCON_ENV)
740 avc->diskSlot = slot;
741 QZero(&avc->metadirty);
744 AFS_RWLOCK_INIT(&avc->lock, "vcache lock");
747 avc->linkData = NULL;
750 avc->execsOrWriters = 0;
752 avc->f.states = CVInit;
753 avc->last_looker = 0;
755 avc->asynchrony = -1;
759 avc->f.truncPos = AFS_NOTRUNC; /* don't truncate until we need to */
760 hzero(avc->f.m.DataVersion); /* in case we copy it into flushDV */
762 avc->callback = serverp; /* to minimize chance that clear
765 #if defined(AFS_CACHE_BYPASS)
766 avc->cachingStates = 0;
767 avc->cachingTransitions = 0;
772 * This routine is responsible for allocating a new cache entry
773 * from the free list. It formats the cache entry and inserts it
774 * into the appropriate hash tables. It must be called with
775 * afs_xvcache write-locked so as to prevent several processes from
776 * trying to create a new cache entry simultaneously.
778 * LOCK: afs_NewVCache afs_xvcache W
780 * \param afid The file id of the file whose cache entry is being created.
782 * \return The new vcache struct.
785 static_inline struct vcache *
786 afs_NewVCache_int(struct VenusFid *afid, struct server *serverp, int seq)
790 afs_int32 anumber = VCACHE_FREE;
792 AFS_STATCNT(afs_NewVCache);
794 afs_FlushReclaimedVcaches();
796 #if defined(AFS_LINUX22_ENV)
797 if(!afsd_dynamic_vcaches) {
798 afs_ShakeLooseVCaches(anumber);
799 if (afs_vcount >= afs_maxvcount) {
800 afs_warn("afs_NewVCache - none freed\n");
804 tvc = afs_AllocVCache();
805 #else /* AFS_LINUX22_ENV */
806 /* pull out a free cache entry */
808 afs_ShakeLooseVCaches(anumber);
812 tvc = afs_AllocVCache();
814 tvc = freeVCList; /* take from free list */
815 freeVCList = tvc->nextfree;
816 tvc->nextfree = NULL;
817 } /* end of if (!freeVCList) */
819 #endif /* AFS_LINUX22_ENV */
821 #if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV)
823 panic("afs_NewVCache(): free vcache with vnode attached");
826 /* Populate the vcache with as much as we can. */
827 afs_PrePopulateVCache(tvc, afid, serverp);
829 /* Thread the vcache onto the VLRU */
834 tvc->hnext = afs_vhashT[i];
836 QAdd(&afs_vhashTV[j], &tvc->vhashq);
838 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
839 refpanic("NewVCache VLRU inconsistent");
841 QAdd(&VLRU, &tvc->vlruq); /* put in lruq */
842 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
843 refpanic("NewVCache VLRU inconsistent2");
845 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
846 refpanic("NewVCache VLRU inconsistent3");
848 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
849 refpanic("NewVCache VLRU inconsistent4");
853 /* it should now be safe to drop the xvcache lock - so attach an inode
854 * to this vcache, where necessary */
855 osi_AttachVnode(tvc, seq);
857 /* Get a reference count to hold this vcache for the VLRUQ. Note that
858 * we have to do this after attaching the vnode, because the reference
859 * count may be held in the vnode itself */
861 #if defined(AFS_LINUX22_ENV)
862 /* Hold it for the LRU (should make count 2) */
864 #elif !(defined (AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV))
865 VREFCOUNT_SET(tvc, 1); /* us */
868 #if defined (AFS_FBSD_ENV)
869 if (tvc->f.states & CVInit)
871 afs_PostPopulateVCache(tvc, afid, seq);
878 afs_NewVCache(struct VenusFid *afid, struct server *serverp)
880 return afs_NewVCache_int(afid, serverp, 0);
884 afs_NewBulkVCache(struct VenusFid *afid, struct server *serverp, int seq)
886 return afs_NewVCache_int(afid, serverp, seq);
892 * LOCK: afs_FlushActiveVcaches afs_xvcache N
894 * \param doflocks : Do we handle flocks?
897 afs_FlushActiveVcaches(register afs_int32 doflocks)
899 register struct vcache *tvc;
901 register struct afs_conn *tc;
902 register afs_int32 code;
903 afs_ucred_t *cred = NULL;
904 struct vrequest treq, ureq;
905 struct AFSVolSync tsync;
908 AFS_STATCNT(afs_FlushActiveVcaches);
909 ObtainReadLock(&afs_xvcache);
910 for (i = 0; i < VCSIZE; i++) {
911 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
912 if (tvc->f.states & CVInit) continue;
913 #ifdef AFS_DARWIN80_ENV
914 if (tvc->f.states & CDeadVnode &&
915 (tvc->f.states & (CCore|CUnlinkedDel) ||
916 tvc->flockCount)) panic("Dead vnode has core/unlinkedel/flock");
918 if (doflocks && tvc->flockCount != 0) {
919 /* if this entry has an flock, send a keep-alive call out */
921 ReleaseReadLock(&afs_xvcache);
922 ObtainWriteLock(&tvc->lock, 51);
924 afs_InitReq(&treq, afs_osi_credp);
925 treq.flags |= O_NONBLOCK;
927 tc = afs_Conn(&tvc->f.fid, &treq, SHARED_LOCK);
929 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_EXTENDLOCK);
932 RXAFS_ExtendLock(tc->id,
933 (struct AFSFid *)&tvc->f.fid.Fid,
940 (tc, code, &tvc->f.fid, &treq,
941 AFS_STATS_FS_RPCIDX_EXTENDLOCK, SHARED_LOCK, NULL));
943 ReleaseWriteLock(&tvc->lock);
944 #ifdef AFS_DARWIN80_ENV
946 ObtainReadLock(&afs_xvcache);
948 ObtainReadLock(&afs_xvcache);
953 if ((tvc->f.states & CCore) || (tvc->f.states & CUnlinkedDel)) {
955 * Don't let it evaporate in case someone else is in
956 * this code. Also, drop the afs_xvcache lock while
957 * getting vcache locks.
960 ReleaseReadLock(&afs_xvcache);
961 #ifdef AFS_BOZONLOCK_ENV
962 afs_BozonLock(&tvc->pvnLock, tvc);
964 #if defined(AFS_SGI_ENV)
966 * That's because if we come in via the CUnlinkedDel bit state path we'll be have 0 refcnt
968 osi_Assert(VREFCOUNT_GT(tvc,0));
969 AFS_RWLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
971 ObtainWriteLock(&tvc->lock, 52);
972 if (tvc->f.states & CCore) {
973 tvc->f.states &= ~CCore;
974 /* XXXX Find better place-holder for cred XXXX */
975 cred = (afs_ucred_t *)tvc->linkData;
976 tvc->linkData = NULL; /* XXX */
977 afs_InitReq(&ureq, cred);
978 afs_Trace2(afs_iclSetp, CM_TRACE_ACTCCORE,
979 ICL_TYPE_POINTER, tvc, ICL_TYPE_INT32,
980 tvc->execsOrWriters);
981 code = afs_StoreOnLastReference(tvc, &ureq);
982 ReleaseWriteLock(&tvc->lock);
983 #ifdef AFS_BOZONLOCK_ENV
984 afs_BozonUnlock(&tvc->pvnLock, tvc);
989 if (code && code != VNOVNODE) {
990 afs_StoreWarn(code, tvc->f.fid.Fid.Volume,
991 /* /dev/console */ 1);
993 } else if (tvc->f.states & CUnlinkedDel) {
997 ReleaseWriteLock(&tvc->lock);
998 #ifdef AFS_BOZONLOCK_ENV
999 afs_BozonUnlock(&tvc->pvnLock, tvc);
1001 #if defined(AFS_SGI_ENV)
1002 AFS_RWUNLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1004 afs_remunlink(tvc, 0);
1005 #if defined(AFS_SGI_ENV)
1006 AFS_RWLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1009 /* lost (or won, perhaps) the race condition */
1010 ReleaseWriteLock(&tvc->lock);
1011 #ifdef AFS_BOZONLOCK_ENV
1012 afs_BozonUnlock(&tvc->pvnLock, tvc);
1015 #if defined(AFS_SGI_ENV)
1016 AFS_RWUNLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1018 #ifdef AFS_DARWIN80_ENV
1021 AFS_RELE(AFSTOV(tvc));
1022 /* Matches write code setting CCore flag */
1025 ObtainReadLock(&afs_xvcache);
1027 ObtainReadLock(&afs_xvcache);
1030 AFS_RELE(AFSTOV(tvc));
1031 /* Matches write code setting CCore flag */
1038 ReleaseReadLock(&afs_xvcache);
1044 * Make sure a cache entry is up-to-date status-wise.
1046 * NOTE: everywhere that calls this can potentially be sped up
1047 * by checking CStatd first, and avoiding doing the InitReq
1048 * if this is up-to-date.
1050 * Anymore, the only places that call this KNOW already that the
1051 * vcache is not up-to-date, so we don't screw around.
1053 * \param avc : Ptr to vcache entry to verify.
1059 * Make sure a cache entry is up-to-date status-wise.
1061 * NOTE: everywhere that calls this can potentially be sped up
1062 * by checking CStatd first, and avoiding doing the InitReq
1063 * if this is up-to-date.
1065 * Anymore, the only places that call this KNOW already that the
1066 * vcache is not up-to-date, so we don't screw around.
1068 * \param avc Pointer to vcache entry to verify.
1071 * \return 0 for success or other error codes.
1074 afs_VerifyVCache2(struct vcache *avc, struct vrequest *areq)
1076 register struct vcache *tvc;
1078 AFS_STATCNT(afs_VerifyVCache);
1080 /* otherwise we must fetch the status info */
1082 ObtainWriteLock(&avc->lock, 53);
1083 if (avc->f.states & CStatd) {
1084 ReleaseWriteLock(&avc->lock);
1087 ObtainWriteLock(&afs_xcbhash, 461);
1088 avc->f.states &= ~(CStatd | CUnique);
1089 avc->callback = NULL;
1090 afs_DequeueCallback(avc);
1091 ReleaseWriteLock(&afs_xcbhash);
1092 ReleaseWriteLock(&avc->lock);
1094 /* since we've been called back, or the callback has expired,
1095 * it's possible that the contents of this directory, or this
1096 * file's name have changed, thus invalidating the dnlc contents.
1098 if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
1099 osi_dnlc_purgedp(avc);
1101 osi_dnlc_purgevp(avc);
1103 /* fetch the status info */
1104 tvc = afs_GetVCache(&avc->f.fid, areq, NULL, avc);
1107 /* Put it back; caller has already incremented vrefCount */
1111 } /*afs_VerifyVCache */
1115 * Simple copy of stat info into cache.
1117 * Callers:as of 1992-04-29, only called by WriteVCache
1119 * \param avc Ptr to vcache entry involved.
1120 * \param astat Ptr to stat info to copy.
1124 afs_SimpleVStat(register struct vcache *avc,
1125 register struct AFSFetchStatus *astat, struct vrequest *areq)
1128 AFS_STATCNT(afs_SimpleVStat);
1130 #ifdef AFS_64BIT_CLIENT
1131 FillInt64(length, astat->Length_hi, astat->Length);
1132 #else /* AFS_64BIT_CLIENT */
1133 length = astat->Length;
1134 #endif /* AFS_64BIT_CLIENT */
1136 #if defined(AFS_SGI_ENV)
1137 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1138 && !AFS_VN_MAPPED((vnode_t *) avc)) {
1139 osi_Assert((valusema(&avc->vc_rwlock) <= 0)
1140 && (OSI_GET_LOCKID() == avc->vc_rwlockid));
1141 if (length < avc->f.m.Length) {
1142 vnode_t *vp = (vnode_t *) avc;
1144 osi_Assert(WriteLocked(&avc->lock));
1145 ReleaseWriteLock(&avc->lock);
1147 PTOSSVP(vp, (off_t) length, (off_t) MAXLONG);
1149 ObtainWriteLock(&avc->lock, 67);
1154 if (!afs_DirtyPages(avc)) {
1155 /* if actively writing the file, don't fetch over this value */
1156 afs_Trace3(afs_iclSetp, CM_TRACE_SIMPLEVSTAT, ICL_TYPE_POINTER, avc,
1157 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length),
1158 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1159 avc->f.m.Length = length;
1160 avc->f.m.Date = astat->ClientModTime;
1162 avc->f.m.Owner = astat->Owner;
1163 avc->f.m.Group = astat->Group;
1164 avc->f.m.Mode = astat->UnixModeBits;
1165 if (vType(avc) == VREG) {
1166 avc->f.m.Mode |= S_IFREG;
1167 } else if (vType(avc) == VDIR) {
1168 avc->f.m.Mode |= S_IFDIR;
1169 } else if (vType(avc) == VLNK) {
1170 avc->f.m.Mode |= S_IFLNK;
1171 if ((avc->f.m.Mode & 0111) == 0)
1174 if (avc->f.states & CForeign) {
1175 struct axscache *ac;
1176 avc->f.anyAccess = astat->AnonymousAccess;
1178 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1180 * Caller has at least one bit not covered by anonymous, and
1181 * thus may have interesting rights.
1183 * HOWEVER, this is a really bad idea, because any access query
1184 * for bits which aren't covered by anonymous, on behalf of a user
1185 * who doesn't have any special rights, will result in an answer of
1186 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1187 * It's an especially bad idea under Ultrix, since (due to the lack of
1188 * a proper access() call) it must perform several afs_access() calls
1189 * in order to create magic mode bits that vary according to who makes
1190 * the call. In other words, _every_ stat() generates a test for
1193 #endif /* badidea */
1194 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1195 ac->axess = astat->CallerAccess;
1196 else /* not found, add a new one if possible */
1197 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1200 } /*afs_SimpleVStat */
1204 * Store the status info *only* back to the server for a
1207 * Environment: Must be called with a shared lock held on the vnode.
1209 * \param avc Ptr to the vcache entry.
1210 * \param astatus Ptr to the status info to store.
1211 * \param areq Ptr to the associated vrequest.
1213 * \return Operation status.
1217 afs_WriteVCache(register struct vcache *avc,
1218 register struct AFSStoreStatus *astatus,
1219 struct vrequest *areq)
1222 struct afs_conn *tc;
1223 struct AFSFetchStatus OutStatus;
1224 struct AFSVolSync tsync;
1226 AFS_STATCNT(afs_WriteVCache);
1227 afs_Trace2(afs_iclSetp, CM_TRACE_WVCACHE, ICL_TYPE_POINTER, avc,
1228 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length));
1230 tc = afs_Conn(&avc->f.fid, areq, SHARED_LOCK);
1232 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STORESTATUS);
1235 RXAFS_StoreStatus(tc->id, (struct AFSFid *)&avc->f.fid.Fid,
1236 astatus, &OutStatus, &tsync);
1241 } while (afs_Analyze
1242 (tc, code, &avc->f.fid, areq, AFS_STATS_FS_RPCIDX_STORESTATUS,
1243 SHARED_LOCK, NULL));
1245 UpgradeSToWLock(&avc->lock, 20);
1247 /* success, do the changes locally */
1248 afs_SimpleVStat(avc, &OutStatus, areq);
1250 * Update the date, too. SimpleVStat didn't do this, since
1251 * it thought we were doing this after fetching new status
1252 * over a file being written.
1254 avc->f.m.Date = OutStatus.ClientModTime;
1256 /* failure, set up to check with server next time */
1257 ObtainWriteLock(&afs_xcbhash, 462);
1258 afs_DequeueCallback(avc);
1259 avc->f.states &= ~(CStatd | CUnique); /* turn off stat valid flag */
1260 ReleaseWriteLock(&afs_xcbhash);
1261 if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
1262 osi_dnlc_purgedp(avc); /* if it (could be) a directory */
1264 ConvertWToSLock(&avc->lock);
1267 } /*afs_WriteVCache */
1268 #if defined(AFS_DISCON_ENV)
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);
1351 * Copy astat block into vcache info
1353 * \note This code may get dataversion and length out of sync if the file has
1354 * been modified. This is less than ideal. I haven't thought about it sufficiently
1355 * to be certain that it is adequate.
1357 * \note Environment: Must be called under a write lock
1359 * \param avc Ptr to vcache entry.
1360 * \param astat Ptr to stat block to copy in.
1361 * \param areq Ptr to associated request.
1364 afs_ProcessFS(register struct vcache *avc,
1365 register struct AFSFetchStatus *astat, struct vrequest *areq)
1368 AFS_STATCNT(afs_ProcessFS);
1370 #ifdef AFS_64BIT_CLIENT
1371 FillInt64(length, astat->Length_hi, astat->Length);
1372 #else /* AFS_64BIT_CLIENT */
1373 length = astat->Length;
1374 #endif /* AFS_64BIT_CLIENT */
1375 /* WARNING: afs_DoBulkStat uses the Length field to store a sequence
1376 * number for each bulk status request. Under no circumstances
1377 * should afs_DoBulkStat store a sequence number if the new
1378 * length will be ignored when afs_ProcessFS is called with
1379 * new stats. If you change the following conditional then you
1380 * also need to change the conditional in afs_DoBulkStat. */
1382 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1383 && !AFS_VN_MAPPED((vnode_t *) avc)) {
1385 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)) {
1387 /* if we're writing or mapping this file, don't fetch over these
1390 afs_Trace3(afs_iclSetp, CM_TRACE_PROCESSFS, ICL_TYPE_POINTER, avc,
1391 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length),
1392 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1393 avc->f.m.Length = length;
1394 avc->f.m.Date = astat->ClientModTime;
1396 hset64(avc->f.m.DataVersion, astat->dataVersionHigh, astat->DataVersion);
1397 avc->f.m.Owner = astat->Owner;
1398 avc->f.m.Mode = astat->UnixModeBits;
1399 avc->f.m.Group = astat->Group;
1400 avc->f.m.LinkCount = astat->LinkCount;
1401 if (astat->FileType == File) {
1402 vSetType(avc, VREG);
1403 avc->f.m.Mode |= S_IFREG;
1404 } else if (astat->FileType == Directory) {
1405 vSetType(avc, VDIR);
1406 avc->f.m.Mode |= S_IFDIR;
1407 } else if (astat->FileType == SymbolicLink) {
1408 if (afs_fakestat_enable && (avc->f.m.Mode & 0111) == 0) {
1409 vSetType(avc, VDIR);
1410 avc->f.m.Mode |= S_IFDIR;
1412 vSetType(avc, VLNK);
1413 avc->f.m.Mode |= S_IFLNK;
1415 if ((avc->f.m.Mode & 0111) == 0) {
1419 avc->f.anyAccess = astat->AnonymousAccess;
1421 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1423 * Caller has at least one bit not covered by anonymous, and
1424 * thus may have interesting rights.
1426 * HOWEVER, this is a really bad idea, because any access query
1427 * for bits which aren't covered by anonymous, on behalf of a user
1428 * who doesn't have any special rights, will result in an answer of
1429 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1430 * It's an especially bad idea under Ultrix, since (due to the lack of
1431 * a proper access() call) it must perform several afs_access() calls
1432 * in order to create magic mode bits that vary according to who makes
1433 * the call. In other words, _every_ stat() generates a test for
1436 #endif /* badidea */
1438 struct axscache *ac;
1439 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1440 ac->axess = astat->CallerAccess;
1441 else /* not found, add a new one if possible */
1442 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1444 } /*afs_ProcessFS */
1448 * Get fid from server.
1451 * \param areq Request to be passed on.
1452 * \param name Name of ?? to lookup.
1453 * \param OutStatus Fetch status.
1458 * \return Success status of operation.
1461 afs_RemoteLookup(register struct VenusFid *afid, struct vrequest *areq,
1462 char *name, struct VenusFid *nfid,
1463 struct AFSFetchStatus *OutStatusp,
1464 struct AFSCallBack *CallBackp, struct server **serverp,
1465 struct AFSVolSync *tsyncp)
1469 register struct afs_conn *tc;
1470 struct AFSFetchStatus OutDirStatus;
1473 name = ""; /* XXX */
1475 tc = afs_Conn(afid, areq, SHARED_LOCK);
1478 *serverp = tc->srvr->server;
1480 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_XLOOKUP);
1483 RXAFS_Lookup(tc->id, (struct AFSFid *)&afid->Fid, name,
1484 (struct AFSFid *)&nfid->Fid, OutStatusp,
1485 &OutDirStatus, CallBackp, tsyncp);
1490 } while (afs_Analyze
1491 (tc, code, afid, areq, AFS_STATS_FS_RPCIDX_XLOOKUP, SHARED_LOCK,
1501 * Given a file id and a vrequest structure, fetch the status
1502 * information associated with the file.
1504 * \param afid File ID.
1505 * \param areq Ptr to associated vrequest structure, specifying the
1506 * user whose authentication tokens will be used.
1507 * \param avc Caller may already have a vcache for this file, which is
1510 * \note Environment:
1511 * The cache entry is returned with an increased vrefCount field.
1512 * The entry must be discarded by calling afs_PutVCache when you
1513 * are through using the pointer to the cache entry.
1515 * You should not hold any locks when calling this function, except
1516 * locks on other vcache entries. If you lock more than one vcache
1517 * entry simultaneously, you should lock them in this order:
1519 * 1. Lock all files first, then directories.
1520 * 2. Within a particular type, lock entries in Fid.Vnode order.
1522 * This locking hierarchy is convenient because it allows locking
1523 * of a parent dir cache entry, given a file (to check its access
1524 * control list). It also allows renames to be handled easily by
1525 * locking directories in a constant order.
1527 * \note NB. NewVCache -> FlushVCache presently (4/10/95) drops the xvcache lock.
1529 * \note Might have a vcache structure already, which must
1530 * already be held by the caller
1533 afs_GetVCache(register struct VenusFid *afid, struct vrequest *areq,
1534 afs_int32 * cached, struct vcache *avc)
1537 afs_int32 code, newvcache = 0;
1538 register struct vcache *tvc;
1542 AFS_STATCNT(afs_GetVCache);
1545 *cached = 0; /* Init just in case */
1547 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1551 ObtainSharedLock(&afs_xvcache, 5);
1553 tvc = afs_FindVCache(afid, &retry, DO_STATS | DO_VLRU | IS_SLOCK);
1555 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1556 ReleaseSharedLock(&afs_xvcache);
1557 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1564 osi_Assert((tvc->f.states & CVInit) == 0);
1565 /* If we are in readdir, return the vnode even if not statd */
1566 if ((tvc->f.states & CStatd) || afs_InReadDir(tvc)) {
1567 ReleaseSharedLock(&afs_xvcache);
1571 UpgradeSToWLock(&afs_xvcache, 21);
1573 /* no cache entry, better grab one */
1574 tvc = afs_NewVCache(afid, NULL);
1577 ConvertWToSLock(&afs_xvcache);
1580 ReleaseSharedLock(&afs_xvcache);
1584 afs_stats_cmperf.vcacheMisses++;
1587 ReleaseSharedLock(&afs_xvcache);
1589 ObtainWriteLock(&tvc->lock, 54);
1591 if (tvc->f.states & CStatd) {
1592 ReleaseWriteLock(&tvc->lock);
1595 #ifdef AFS_DARWIN80_ENV
1596 /* Darwin 8.0 only has bufs in nfs, so we shouldn't have to worry about them.
1599 #if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
1601 * XXX - I really don't like this. Should try to understand better.
1602 * It seems that sometimes, when we get called, we already hold the
1603 * lock on the vnode (e.g., from afs_getattr via afs_VerifyVCache).
1604 * We can't drop the vnode lock, because that could result in a race.
1605 * Sometimes, though, we get here and don't hold the vnode lock.
1606 * I hate code paths that sometimes hold locks and sometimes don't.
1607 * In any event, the dodge we use here is to check whether the vnode
1608 * is locked, and if it isn't, then we gain and drop it around the call
1609 * to vinvalbuf; otherwise, we leave it alone.
1612 struct vnode *vp = AFSTOV(tvc);
1615 #if defined(AFS_DARWIN_ENV)
1616 iheldthelock = VOP_ISLOCKED(vp);
1618 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, current_proc());
1619 /* this is messy. we can call fsync which will try to reobtain this */
1620 if (VTOAFS(vp) == tvc)
1621 ReleaseWriteLock(&tvc->lock);
1622 if (UBCINFOEXISTS(vp)) {
1623 vinvalbuf(vp, V_SAVE, &afs_osi_cred, current_proc(), PINOD, 0);
1625 if (VTOAFS(vp) == tvc)
1626 ObtainWriteLock(&tvc->lock, 954);
1628 VOP_UNLOCK(vp, LK_EXCLUSIVE, current_proc());
1629 #elif defined(AFS_FBSD80_ENV)
1630 iheldthelock = VOP_ISLOCKED(vp);
1631 if (!iheldthelock) {
1632 /* nosleep/sleep lock order reversal */
1633 int glocked = ISAFS_GLOCK();
1636 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
1640 vinvalbuf(vp, V_SAVE, PINOD, 0); /* changed late in 8.0-CURRENT */
1643 #elif defined(AFS_FBSD60_ENV)
1644 iheldthelock = VOP_ISLOCKED(vp, curthread);
1646 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread);
1647 vinvalbuf(vp, V_SAVE, curthread, PINOD, 0);
1649 VOP_UNLOCK(vp, LK_EXCLUSIVE, curthread);
1650 #elif defined(AFS_FBSD_ENV)
1651 iheldthelock = VOP_ISLOCKED(vp, curthread);
1653 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread);
1654 vinvalbuf(vp, V_SAVE, osi_curcred(), curthread, PINOD, 0);
1656 VOP_UNLOCK(vp, LK_EXCLUSIVE, curthread);
1657 #elif defined(AFS_OBSD_ENV)
1658 iheldthelock = VOP_ISLOCKED(vp, curproc);
1660 VOP_LOCK(vp, LK_EXCLUSIVE | LK_RETRY, curproc);
1661 uvm_vnp_uncache(vp);
1663 VOP_UNLOCK(vp, 0, curproc);
1664 #elif defined(AFS_NBSD40_ENV)
1665 iheldthelock = VOP_ISLOCKED(vp);
1666 if (!iheldthelock) {
1667 VOP_LOCK(vp, LK_EXCLUSIVE | LK_RETRY);
1669 uvm_vnp_uncache(vp);
1677 ObtainWriteLock(&afs_xcbhash, 464);
1678 tvc->f.states &= ~CUnique;
1680 afs_DequeueCallback(tvc);
1681 ReleaseWriteLock(&afs_xcbhash);
1683 /* It is always appropriate to throw away all the access rights? */
1684 afs_FreeAllAxs(&(tvc->Access));
1685 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-volume info */
1687 if ((tvp->states & VForeign)) {
1689 tvc->f.states |= CForeign;
1690 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
1691 && (tvp->rootUnique == afid->Fid.Unique)) {
1695 if (tvp->states & VRO)
1696 tvc->f.states |= CRO;
1697 if (tvp->states & VBackup)
1698 tvc->f.states |= CBackup;
1699 /* now copy ".." entry back out of volume structure, if necessary */
1700 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
1702 tvc->mvid = (struct VenusFid *)
1703 osi_AllocSmallSpace(sizeof(struct VenusFid));
1704 *tvc->mvid = tvp->dotdot;
1706 afs_PutVolume(tvp, READ_LOCK);
1710 afs_RemoveVCB(afid);
1712 struct AFSFetchStatus OutStatus;
1714 if (afs_DynrootNewVnode(tvc, &OutStatus)) {
1715 afs_ProcessFS(tvc, &OutStatus, areq);
1716 tvc->f.states |= CStatd | CUnique;
1717 tvc->f.parent.vnode = OutStatus.ParentVnode;
1718 tvc->f.parent.unique = OutStatus.ParentUnique;
1722 if (AFS_IS_DISCONNECTED) {
1723 /* Nothing to do otherwise...*/
1725 /* printf("Network is down in afs_GetCache"); */
1727 code = afs_FetchStatus(tvc, afid, areq, &OutStatus);
1729 /* For the NFS translator's benefit, make sure
1730 * non-directory vnodes always have their parent FID set
1731 * correctly, even when created as a result of decoding an
1732 * NFS filehandle. It would be nice to also do this for
1733 * directories, but we can't because the fileserver fills
1734 * in the FID of the directory itself instead of that of
1737 if (!code && OutStatus.FileType != Directory &&
1738 !tvc->f.parent.vnode) {
1739 tvc->f.parent.vnode = OutStatus.ParentVnode;
1740 tvc->f.parent.unique = OutStatus.ParentUnique;
1741 /* XXX - SXW - It's conceivable we should mark ourselves
1742 * as dirty again here, incase we've been raced
1743 * out of the FetchStatus call.
1750 ReleaseWriteLock(&tvc->lock);
1756 ReleaseWriteLock(&tvc->lock);
1759 } /*afs_GetVCache */
1764 * Lookup a vcache by fid. Look inside the cache first, if not
1765 * there, lookup the file on the server, and then get it's fresh
1770 * \param cached Is element cached? If NULL, don't answer.
1774 * \return The found element or NULL.
1777 afs_LookupVCache(struct VenusFid *afid, struct vrequest *areq,
1778 afs_int32 * cached, struct vcache *adp, char *aname)
1780 afs_int32 code, now, newvcache = 0;
1781 struct VenusFid nfid;
1782 register struct vcache *tvc;
1784 struct AFSFetchStatus OutStatus;
1785 struct AFSCallBack CallBack;
1786 struct AFSVolSync tsync;
1787 struct server *serverp = 0;
1791 AFS_STATCNT(afs_GetVCache);
1793 *cached = 0; /* Init just in case */
1795 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1799 ObtainReadLock(&afs_xvcache);
1800 tvc = afs_FindVCache(afid, &retry, DO_STATS /* no vlru */ );
1803 ReleaseReadLock(&afs_xvcache);
1805 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1806 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1810 ObtainReadLock(&tvc->lock);
1812 if (tvc->f.states & CStatd) {
1816 ReleaseReadLock(&tvc->lock);
1819 tvc->f.states &= ~CUnique;
1821 ReleaseReadLock(&tvc->lock);
1823 ObtainReadLock(&afs_xvcache);
1826 ReleaseReadLock(&afs_xvcache);
1828 /* lookup the file */
1831 origCBs = afs_allCBs; /* if anything changes, we don't have a cb */
1833 if (AFS_IS_DISCONNECTED) {
1834 /* printf("Network is down in afs_LookupVcache\n"); */
1838 afs_RemoteLookup(&adp->f.fid, areq, aname, &nfid, &OutStatus,
1839 &CallBack, &serverp, &tsync);
1841 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1845 ObtainSharedLock(&afs_xvcache, 6);
1846 tvc = afs_FindVCache(&nfid, &retry, DO_VLRU | IS_SLOCK/* no xstats now */ );
1848 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1849 ReleaseSharedLock(&afs_xvcache);
1850 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1856 /* no cache entry, better grab one */
1857 UpgradeSToWLock(&afs_xvcache, 22);
1858 tvc = afs_NewVCache(&nfid, serverp);
1860 ConvertWToSLock(&afs_xvcache);
1863 ReleaseSharedLock(&afs_xvcache);
1868 ReleaseSharedLock(&afs_xvcache);
1869 ObtainWriteLock(&tvc->lock, 55);
1871 /* It is always appropriate to throw away all the access rights? */
1872 afs_FreeAllAxs(&(tvc->Access));
1873 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-vol info */
1875 if ((tvp->states & VForeign)) {
1877 tvc->f.states |= CForeign;
1878 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
1879 && (tvp->rootUnique == afid->Fid.Unique))
1882 if (tvp->states & VRO)
1883 tvc->f.states |= CRO;
1884 if (tvp->states & VBackup)
1885 tvc->f.states |= CBackup;
1886 /* now copy ".." entry back out of volume structure, if necessary */
1887 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
1889 tvc->mvid = (struct VenusFid *)
1890 osi_AllocSmallSpace(sizeof(struct VenusFid));
1891 *tvc->mvid = tvp->dotdot;
1896 ObtainWriteLock(&afs_xcbhash, 465);
1897 afs_DequeueCallback(tvc);
1898 tvc->f.states &= ~(CStatd | CUnique);
1899 ReleaseWriteLock(&afs_xcbhash);
1900 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
1901 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
1903 afs_PutVolume(tvp, READ_LOCK);
1904 ReleaseWriteLock(&tvc->lock);
1909 ObtainWriteLock(&afs_xcbhash, 466);
1910 if (origCBs == afs_allCBs) {
1911 if (CallBack.ExpirationTime) {
1912 tvc->callback = serverp;
1913 tvc->cbExpires = CallBack.ExpirationTime + now;
1914 tvc->f.states |= CStatd | CUnique;
1915 tvc->f.states &= ~CBulkFetching;
1916 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvp);
1917 } else if (tvc->f.states & CRO) {
1918 /* adapt gives us an hour. */
1919 tvc->cbExpires = 3600 + osi_Time();
1920 /*XXX*/ tvc->f.states |= CStatd | CUnique;
1921 tvc->f.states &= ~CBulkFetching;
1922 afs_QueueCallback(tvc, CBHash(3600), tvp);
1924 tvc->callback = NULL;
1925 afs_DequeueCallback(tvc);
1926 tvc->f.states &= ~(CStatd | CUnique);
1927 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
1928 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
1931 afs_DequeueCallback(tvc);
1932 tvc->f.states &= ~CStatd;
1933 tvc->f.states &= ~CUnique;
1934 tvc->callback = NULL;
1935 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
1936 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
1938 ReleaseWriteLock(&afs_xcbhash);
1940 afs_PutVolume(tvp, READ_LOCK);
1941 afs_ProcessFS(tvc, &OutStatus, areq);
1943 ReleaseWriteLock(&tvc->lock);
1949 afs_GetRootVCache(struct VenusFid *afid, struct vrequest *areq,
1950 afs_int32 * cached, struct volume *tvolp)
1952 afs_int32 code = 0, i, newvcache = 0, haveStatus = 0;
1953 afs_int32 getNewFid = 0;
1955 struct VenusFid nfid;
1956 register struct vcache *tvc;
1957 struct server *serverp = 0;
1958 struct AFSFetchStatus OutStatus;
1959 struct AFSCallBack CallBack;
1960 struct AFSVolSync tsync;
1962 #ifdef AFS_DARWIN80_ENV
1969 if (!tvolp->rootVnode || getNewFid) {
1970 struct VenusFid tfid;
1973 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
1974 origCBs = afs_allCBs; /* ignore InitCallBackState */
1976 afs_RemoteLookup(&tfid, areq, NULL, &nfid, &OutStatus, &CallBack,
1981 /* ReleaseReadLock(&tvolp->lock); */
1982 ObtainWriteLock(&tvolp->lock, 56);
1983 tvolp->rootVnode = afid->Fid.Vnode = nfid.Fid.Vnode;
1984 tvolp->rootUnique = afid->Fid.Unique = nfid.Fid.Unique;
1985 ReleaseWriteLock(&tvolp->lock);
1986 /* ObtainReadLock(&tvolp->lock);*/
1989 afid->Fid.Vnode = tvolp->rootVnode;
1990 afid->Fid.Unique = tvolp->rootUnique;
1994 ObtainSharedLock(&afs_xvcache, 7);
1996 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
1997 if (!FidCmp(&(tvc->f.fid), afid)) {
1998 if (tvc->f.states & CVInit) {
1999 ReleaseSharedLock(&afs_xvcache);
2000 afs_osi_Sleep(&tvc->f.states);
2003 #ifdef AFS_DARWIN80_ENV
2004 if (tvc->f.states & CDeadVnode) {
2005 if (!(tvc->f.states & CBulkFetching)) {
2006 ReleaseSharedLock(&afs_xvcache);
2007 afs_osi_Sleep(&tvc->f.states);
2012 if (vnode_get(tvp)) /* this bumps ref count */
2014 if (vnode_ref(tvp)) {
2016 /* AFSTOV(tvc) may be NULL */
2021 if (tvc->f.states & (CBulkFetching|CDeadVnode)) {
2023 vnode_recycle(AFSTOV(tvc));
2031 if (!haveStatus && (!tvc || !(tvc->f.states & CStatd))) {
2032 /* Mount point no longer stat'd or unknown. FID may have changed. */
2034 ReleaseSharedLock(&afs_xvcache);
2035 #ifdef AFS_DARWIN80_ENV
2038 vnode_put(AFSTOV(tvc));
2039 vnode_rele(AFSTOV(tvc));
2048 UpgradeSToWLock(&afs_xvcache, 23);
2049 /* no cache entry, better grab one */
2050 tvc = afs_NewVCache(afid, NULL);
2053 ReleaseWriteLock(&afs_xvcache);
2057 afs_stats_cmperf.vcacheMisses++;
2061 afs_stats_cmperf.vcacheHits++;
2062 #if defined(AFS_DARWIN80_ENV)
2063 /* we already bumped the ref count in the for loop above */
2064 #else /* AFS_DARWIN80_ENV */
2067 UpgradeSToWLock(&afs_xvcache, 24);
2068 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2069 refpanic("GRVC VLRU inconsistent0");
2071 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2072 refpanic("GRVC VLRU inconsistent1");
2074 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2075 refpanic("GRVC VLRU inconsistent2");
2077 QRemove(&tvc->vlruq); /* move to lruq head */
2078 QAdd(&VLRU, &tvc->vlruq);
2079 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2080 refpanic("GRVC VLRU inconsistent3");
2082 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2083 refpanic("GRVC VLRU inconsistent4");
2085 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2086 refpanic("GRVC VLRU inconsistent5");
2091 ReleaseWriteLock(&afs_xvcache);
2093 if (tvc->f.states & CStatd) {
2097 ObtainReadLock(&tvc->lock);
2098 tvc->f.states &= ~CUnique;
2099 tvc->callback = NULL; /* redundant, perhaps */
2100 ReleaseReadLock(&tvc->lock);
2103 ObtainWriteLock(&tvc->lock, 57);
2105 /* It is always appropriate to throw away all the access rights? */
2106 afs_FreeAllAxs(&(tvc->Access));
2109 tvc->f.states |= CForeign;
2110 if (tvolp->states & VRO)
2111 tvc->f.states |= CRO;
2112 if (tvolp->states & VBackup)
2113 tvc->f.states |= CBackup;
2114 /* now copy ".." entry back out of volume structure, if necessary */
2115 if (newvcache && (tvolp->rootVnode == afid->Fid.Vnode)
2116 && (tvolp->rootUnique == afid->Fid.Unique)) {
2119 if (tvc->mvstat == 2 && tvolp->dotdot.Fid.Volume != 0) {
2121 tvc->mvid = (struct VenusFid *)
2122 osi_AllocSmallSpace(sizeof(struct VenusFid));
2123 *tvc->mvid = tvolp->dotdot;
2127 afs_RemoveVCB(afid);
2130 struct VenusFid tfid;
2133 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
2134 origCBs = afs_allCBs; /* ignore InitCallBackState */
2136 afs_RemoteLookup(&tfid, areq, NULL, &nfid, &OutStatus, &CallBack,
2141 ObtainWriteLock(&afs_xcbhash, 467);
2142 afs_DequeueCallback(tvc);
2143 tvc->callback = NULL;
2144 tvc->f.states &= ~(CStatd | CUnique);
2145 ReleaseWriteLock(&afs_xcbhash);
2146 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2147 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2148 ReleaseWriteLock(&tvc->lock);
2153 ObtainWriteLock(&afs_xcbhash, 468);
2154 if (origCBs == afs_allCBs) {
2155 tvc->f.states |= CTruth;
2156 tvc->callback = serverp;
2157 if (CallBack.ExpirationTime != 0) {
2158 tvc->cbExpires = CallBack.ExpirationTime + start;
2159 tvc->f.states |= CStatd;
2160 tvc->f.states &= ~CBulkFetching;
2161 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvolp);
2162 } else if (tvc->f.states & CRO) {
2163 /* adapt gives us an hour. */
2164 tvc->cbExpires = 3600 + osi_Time();
2165 /*XXX*/ tvc->f.states |= CStatd;
2166 tvc->f.states &= ~CBulkFetching;
2167 afs_QueueCallback(tvc, CBHash(3600), tvolp);
2170 afs_DequeueCallback(tvc);
2171 tvc->callback = NULL;
2172 tvc->f.states &= ~(CStatd | CUnique);
2173 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2174 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2176 ReleaseWriteLock(&afs_xcbhash);
2177 afs_ProcessFS(tvc, &OutStatus, areq);
2179 ReleaseWriteLock(&tvc->lock);
2185 * Update callback status and (sometimes) attributes of a vnode.
2186 * Called after doing a fetch status RPC. Whilst disconnected, attributes
2187 * shouldn't be written to the vcache here.
2192 * \param Outsp Server status after rpc call.
2193 * \param acb Callback for this vnode.
2195 * \note The vcache must be write locked.
2198 afs_UpdateStatus(struct vcache *avc, struct VenusFid *afid,
2199 struct vrequest *areq, struct AFSFetchStatus *Outsp,
2200 struct AFSCallBack *acb, afs_uint32 start)
2202 struct volume *volp;
2205 /* Dont write status in vcache if resyncing after a disconnection. */
2206 afs_ProcessFS(avc, Outsp, areq);
2208 volp = afs_GetVolume(afid, areq, READ_LOCK);
2209 ObtainWriteLock(&afs_xcbhash, 469);
2210 avc->f.states |= CTruth;
2211 if (avc->callback /* check for race */ ) {
2212 if (acb->ExpirationTime != 0) {
2213 avc->cbExpires = acb->ExpirationTime + start;
2214 avc->f.states |= CStatd;
2215 avc->f.states &= ~CBulkFetching;
2216 afs_QueueCallback(avc, CBHash(acb->ExpirationTime), volp);
2217 } else if (avc->f.states & CRO) {
2218 /* ordinary callback on a read-only volume -- AFS 3.2 style */
2219 avc->cbExpires = 3600 + start;
2220 avc->f.states |= CStatd;
2221 avc->f.states &= ~CBulkFetching;
2222 afs_QueueCallback(avc, CBHash(3600), volp);
2224 afs_DequeueCallback(avc);
2225 avc->callback = NULL;
2226 avc->f.states &= ~(CStatd | CUnique);
2227 if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
2228 osi_dnlc_purgedp(avc); /* if it (could be) a directory */
2231 afs_DequeueCallback(avc);
2232 avc->callback = NULL;
2233 avc->f.states &= ~(CStatd | CUnique);
2234 if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
2235 osi_dnlc_purgedp(avc); /* if it (could be) a directory */
2237 ReleaseWriteLock(&afs_xcbhash);
2239 afs_PutVolume(volp, READ_LOCK);
2243 * Must be called with avc write-locked
2244 * don't absolutely have to invalidate the hint unless the dv has
2245 * changed, but be sure to get it right else there will be consistency bugs.
2248 afs_FetchStatus(struct vcache * avc, struct VenusFid * afid,
2249 struct vrequest * areq, struct AFSFetchStatus * Outsp)
2252 afs_uint32 start = 0;
2253 register struct afs_conn *tc;
2254 struct AFSCallBack CallBack;
2255 struct AFSVolSync tsync;
2258 tc = afs_Conn(afid, areq, SHARED_LOCK);
2259 avc->dchint = NULL; /* invalidate hints */
2261 avc->callback = tc->srvr->server;
2263 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_FETCHSTATUS);
2266 RXAFS_FetchStatus(tc->id, (struct AFSFid *)&afid->Fid, Outsp,
2274 } while (afs_Analyze
2275 (tc, code, afid, areq, AFS_STATS_FS_RPCIDX_FETCHSTATUS,
2276 SHARED_LOCK, NULL));
2279 afs_UpdateStatus(avc, afid, areq, Outsp, &CallBack, start);
2281 /* used to undo the local callback, but that's too extreme.
2282 * There are plenty of good reasons that fetchstatus might return
2283 * an error, such as EPERM. If we have the vnode cached, statd,
2284 * with callback, might as well keep track of the fact that we
2285 * don't have access...
2287 if (code == EPERM || code == EACCES) {
2288 struct axscache *ac;
2289 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
2291 else /* not found, add a new one if possible */
2292 afs_AddAxs(avc->Access, areq->uid, 0);
2303 * Stuff some information into the vcache for the given file.
2306 * afid : File in question.
2307 * OutStatus : Fetch status on the file.
2308 * CallBack : Callback info.
2309 * tc : RPC connection involved.
2310 * areq : vrequest involved.
2313 * Nothing interesting.
2316 afs_StuffVcache(register struct VenusFid *afid,
2317 struct AFSFetchStatus *OutStatus,
2318 struct AFSCallBack *CallBack, register struct afs_conn *tc,
2319 struct vrequest *areq)
2321 register afs_int32 code, i, newvcache = 0;
2322 register struct vcache *tvc;
2323 struct AFSVolSync tsync;
2325 struct axscache *ac;
2328 AFS_STATCNT(afs_StuffVcache);
2329 #ifdef IFS_VCACHECOUNT
2334 ObtainSharedLock(&afs_xvcache, 8);
2336 tvc = afs_FindVCache(afid, &retry, DO_VLRU| IS_SLOCK /* no stats */ );
2338 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2339 ReleaseSharedLock(&afs_xvcache);
2340 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2346 /* no cache entry, better grab one */
2347 UpgradeSToWLock(&afs_xvcache, 25);
2348 tvc = afs_NewVCache(afid, NULL);
2350 ConvertWToSLock(&afs_xvcache);
2353 ReleaseSharedLock(&afs_xvcache);
2358 ReleaseSharedLock(&afs_xvcache);
2359 ObtainWriteLock(&tvc->lock, 58);
2361 tvc->f.states &= ~CStatd;
2362 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2363 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2365 /* Is it always appropriate to throw away all the access rights? */
2366 afs_FreeAllAxs(&(tvc->Access));
2368 /*Copy useful per-volume info */
2369 tvp = afs_GetVolume(afid, areq, READ_LOCK);
2371 if (newvcache && (tvp->states & VForeign))
2372 tvc->f.states |= CForeign;
2373 if (tvp->states & VRO)
2374 tvc->f.states |= CRO;
2375 if (tvp->states & VBackup)
2376 tvc->f.states |= CBackup;
2378 * Now, copy ".." entry back out of volume structure, if
2381 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
2383 tvc->mvid = (struct VenusFid *)
2384 osi_AllocSmallSpace(sizeof(struct VenusFid));
2385 *tvc->mvid = tvp->dotdot;
2388 /* store the stat on the file */
2389 afs_RemoveVCB(afid);
2390 afs_ProcessFS(tvc, OutStatus, areq);
2391 tvc->callback = tc->srvr->server;
2393 /* we use osi_Time twice below. Ideally, we would use the time at which
2394 * the FetchStatus call began, instead, but we don't have it here. So we
2395 * make do with "now". In the CRO case, it doesn't really matter. In
2396 * the other case, we hope that the difference between "now" and when the
2397 * call actually began execution on the server won't be larger than the
2398 * padding which the server keeps. Subtract 1 second anyway, to be on
2399 * the safe side. Can't subtract more because we don't know how big
2400 * ExpirationTime is. Possible consistency problems may arise if the call
2401 * timeout period becomes longer than the server's expiration padding. */
2402 ObtainWriteLock(&afs_xcbhash, 470);
2403 if (CallBack->ExpirationTime != 0) {
2404 tvc->cbExpires = CallBack->ExpirationTime + osi_Time() - 1;
2405 tvc->f.states |= CStatd;
2406 tvc->f.states &= ~CBulkFetching;
2407 afs_QueueCallback(tvc, CBHash(CallBack->ExpirationTime), tvp);
2408 } else if (tvc->f.states & CRO) {
2409 /* old-fashioned AFS 3.2 style */
2410 tvc->cbExpires = 3600 + osi_Time();
2411 /*XXX*/ tvc->f.states |= CStatd;
2412 tvc->f.states &= ~CBulkFetching;
2413 afs_QueueCallback(tvc, CBHash(3600), tvp);
2415 afs_DequeueCallback(tvc);
2416 tvc->callback = NULL;
2417 tvc->f.states &= ~(CStatd | CUnique);
2418 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2419 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2421 ReleaseWriteLock(&afs_xcbhash);
2423 afs_PutVolume(tvp, READ_LOCK);
2425 /* look in per-pag cache */
2426 if (tvc->Access && (ac = afs_FindAxs(tvc->Access, areq->uid)))
2427 ac->axess = OutStatus->CallerAccess; /* substitute pags */
2428 else /* not found, add a new one if possible */
2429 afs_AddAxs(tvc->Access, areq->uid, OutStatus->CallerAccess);
2431 ReleaseWriteLock(&tvc->lock);
2432 afs_Trace4(afs_iclSetp, CM_TRACE_STUFFVCACHE, ICL_TYPE_POINTER, tvc,
2433 ICL_TYPE_POINTER, tvc->callback, ICL_TYPE_INT32,
2434 tvc->cbExpires, ICL_TYPE_INT32, tvc->cbExpires - osi_Time());
2436 * Release ref count... hope this guy stays around...
2439 } /*afs_StuffVcache */
2443 * Decrements the reference count on a cache entry.
2445 * \param avc Pointer to the cache entry to decrement.
2447 * \note Environment: Nothing interesting.
2450 afs_PutVCache(register struct vcache *avc)
2452 AFS_STATCNT(afs_PutVCache);
2453 #ifdef AFS_DARWIN80_ENV
2454 vnode_put(AFSTOV(avc));
2458 * Can we use a read lock here?
2460 ObtainReadLock(&afs_xvcache);
2462 ReleaseReadLock(&afs_xvcache);
2464 } /*afs_PutVCache */
2468 * Reset a vcache entry, so local contents are ignored, and the
2469 * server will be reconsulted next time the vcache is used
2471 * \param avc Pointer to the cache entry to reset
2474 * \note avc must be write locked on entry
2477 afs_ResetVCache(struct vcache *avc, afs_ucred_t *acred)
2479 ObtainWriteLock(&afs_xcbhash, 456);
2480 afs_DequeueCallback(avc);
2481 avc->f.states &= ~(CStatd | CDirty); /* next reference will re-stat */
2482 ReleaseWriteLock(&afs_xcbhash);
2483 /* now find the disk cache entries */
2484 afs_TryToSmush(avc, acred, 1);
2485 osi_dnlc_purgedp(avc);
2486 if (avc->linkData && !(avc->f.states & CCore)) {
2487 afs_osi_Free(avc->linkData, strlen(avc->linkData) + 1);
2488 avc->linkData = NULL;
2493 * Sleepa when searching for a vcache. Releases all the pending locks,
2494 * sleeps then obtains the previously released locks.
2496 * \param vcache Enter sleep state.
2497 * \param flag Determines what locks to use.
2502 findvc_sleep(struct vcache *avc, int flag)
2504 int fstates = avc->f.states;
2505 if (flag & IS_SLOCK) {
2506 ReleaseSharedLock(&afs_xvcache);
2508 if (flag & IS_WLOCK) {
2509 ReleaseWriteLock(&afs_xvcache);
2511 ReleaseReadLock(&afs_xvcache);
2514 if (flag & FIND_CDEAD) {
2515 ObtainWriteLock(&afs_xvcache, 342);
2516 afs_FlushReclaimedVcaches();
2517 if (fstates == avc->f.states) {
2518 ReleaseWriteLock(&afs_xvcache);
2519 afs_osi_Sleep(&avc->f.states);
2521 ReleaseWriteLock(&afs_xvcache);
2523 afs_osi_Sleep(&avc->f.states);
2524 if (flag & IS_SLOCK) {
2525 ObtainSharedLock(&afs_xvcache, 341);
2527 if (flag & IS_WLOCK) {
2528 ObtainWriteLock(&afs_xvcache, 343);
2530 ObtainReadLock(&afs_xvcache);
2535 * Find a vcache entry given a fid.
2537 * \param afid Pointer to the fid whose cache entry we desire.
2538 * \param retry (SGI-specific) tell the caller to drop the lock on xvcache,
2539 * unlock the vnode, and try again.
2540 * \param flag Bit 1 to specify whether to compute hit statistics. Not
2541 * set if FindVCache is called as part of internal bookkeeping.
2543 * \note Environment: Must be called with the afs_xvcache lock at least held at
2544 * the read level. In order to do the VLRU adjustment, the xvcache lock
2545 * must be shared-- we upgrade it here.
2549 afs_FindVCache(struct VenusFid *afid, afs_int32 * retry, afs_int32 flag)
2552 register struct vcache *tvc;
2554 #ifdef AFS_DARWIN80_ENV
2558 AFS_STATCNT(afs_FindVCache);
2562 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2563 if (FidMatches(afid, tvc)) {
2564 if (tvc->f.states & CVInit) {
2565 findvc_sleep(tvc, flag);
2568 #ifdef AFS_DARWIN80_ENV
2569 if (tvc->f.states & CDeadVnode) {
2570 if (!(flag & FIND_CDEAD)) {
2571 findvc_sleep(tvc, flag);
2578 if (vnode_ref(tvp)) {
2580 /* AFSTOV(tvc) may be NULL */
2585 if (tvc->f.states & (CBulkFetching|CDeadVnode)) {
2587 vnode_recycle(AFSTOV(tvc));
2595 /* should I have a read lock on the vnode here? */
2599 #if !defined(AFS_DARWIN80_ENV)
2600 osi_vnhold(tvc, retry); /* already held, above */
2601 if (retry && *retry)
2604 #if defined(AFS_DARWIN_ENV) && !defined(AFS_DARWIN80_ENV)
2605 tvc->f.states |= CUBCinit;
2607 if (UBCINFOMISSING(AFSTOV(tvc)) ||
2608 UBCINFORECLAIMED(AFSTOV(tvc))) {
2609 ubc_info_init(AFSTOV(tvc));
2612 tvc->f.states &= ~CUBCinit;
2615 * only move to front of vlru if we have proper vcache locking)
2617 if (flag & DO_VLRU) {
2618 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2619 refpanic("FindVC VLRU inconsistent1");
2621 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2622 refpanic("FindVC VLRU inconsistent1");
2624 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2625 refpanic("FindVC VLRU inconsistent2");
2627 UpgradeSToWLock(&afs_xvcache, 26);
2628 QRemove(&tvc->vlruq);
2629 QAdd(&VLRU, &tvc->vlruq);
2630 ConvertWToSLock(&afs_xvcache);
2631 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2632 refpanic("FindVC VLRU inconsistent1");
2634 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2635 refpanic("FindVC VLRU inconsistent2");
2637 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2638 refpanic("FindVC VLRU inconsistent3");
2644 if (flag & DO_STATS) {
2646 afs_stats_cmperf.vcacheHits++;
2648 afs_stats_cmperf.vcacheMisses++;
2649 if (afs_IsPrimaryCellNum(afid->Cell))
2650 afs_stats_cmperf.vlocalAccesses++;
2652 afs_stats_cmperf.vremoteAccesses++;
2655 } /*afs_FindVCache */
2658 * Find a vcache entry given a fid. Does a wildcard match on what we
2659 * have for the fid. If more than one entry, don't return anything.
2661 * \param avcp Fill in pointer if we found one and only one.
2662 * \param afid Pointer to the fid whose cache entry we desire.
2663 * \param retry (SGI-specific) tell the caller to drop the lock on xvcache,
2664 * unlock the vnode, and try again.
2665 * \param flags bit 1 to specify whether to compute hit statistics. Not
2666 * set if FindVCache is called as part of internal bookkeeping.
2668 * \note Environment: Must be called with the afs_xvcache lock at least held at
2669 * the read level. In order to do the VLRU adjustment, the xvcache lock
2670 * must be shared-- we upgrade it here.
2672 * \return Number of matches found.
2675 int afs_duplicate_nfs_fids = 0;
2678 afs_NFSFindVCache(struct vcache **avcp, struct VenusFid *afid)
2680 register struct vcache *tvc;
2682 afs_int32 count = 0;
2683 struct vcache *found_tvc = NULL;
2684 #ifdef AFS_DARWIN80_ENV
2688 AFS_STATCNT(afs_FindVCache);
2692 ObtainSharedLock(&afs_xvcache, 331);
2695 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2696 /* Match only on what we have.... */
2697 if (((tvc->f.fid.Fid.Vnode & 0xffff) == afid->Fid.Vnode)
2698 && (tvc->f.fid.Fid.Volume == afid->Fid.Volume)
2699 && ((tvc->f.fid.Fid.Unique & 0xffffff) == afid->Fid.Unique)
2700 && (tvc->f.fid.Cell == afid->Cell)) {
2701 if (tvc->f.states & CVInit) {
2702 ReleaseSharedLock(&afs_xvcache);
2703 afs_osi_Sleep(&tvc->f.states);
2706 #ifdef AFS_DARWIN80_ENV
2707 if (tvc->f.states & CDeadVnode) {
2708 if (!(tvc->f.states & CBulkFetching)) {
2709 ReleaseSharedLock(&afs_xvcache);
2710 afs_osi_Sleep(&tvc->f.states);
2715 if (vnode_get(tvp)) {
2716 /* This vnode no longer exists. */
2719 if (vnode_ref(tvp)) {
2720 /* This vnode no longer exists. */
2722 /* AFSTOV(tvc) may be NULL */
2727 if (tvc->f.states & (CBulkFetching|CDeadVnode)) {
2729 vnode_recycle(AFSTOV(tvc));
2732 #endif /* AFS_DARWIN80_ENV */
2736 afs_duplicate_nfs_fids++;
2737 ReleaseSharedLock(&afs_xvcache);
2738 #ifdef AFS_DARWIN80_ENV
2739 /* Drop our reference counts. */
2740 vnode_put(AFSTOV(tvc));
2741 vnode_put(AFSTOV(found_tvc));
2750 /* should I have a read lock on the vnode here? */
2752 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2753 afs_int32 retry = 0;
2754 osi_vnhold(tvc, &retry);
2757 found_tvc = (struct vcache *)0;
2758 ReleaseSharedLock(&afs_xvcache);
2759 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2763 osi_vnhold(tvc, (int *)0); /* already held, above */
2766 * We obtained the xvcache lock above.
2768 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2769 refpanic("FindVC VLRU inconsistent1");
2771 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2772 refpanic("FindVC VLRU inconsistent1");
2774 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2775 refpanic("FindVC VLRU inconsistent2");
2777 UpgradeSToWLock(&afs_xvcache, 568);
2778 QRemove(&tvc->vlruq);
2779 QAdd(&VLRU, &tvc->vlruq);
2780 ConvertWToSLock(&afs_xvcache);
2781 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2782 refpanic("FindVC VLRU inconsistent1");
2784 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2785 refpanic("FindVC VLRU inconsistent2");
2787 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2788 refpanic("FindVC VLRU inconsistent3");
2794 afs_stats_cmperf.vcacheHits++;
2796 afs_stats_cmperf.vcacheMisses++;
2797 if (afs_IsPrimaryCellNum(afid->Cell))
2798 afs_stats_cmperf.vlocalAccesses++;
2800 afs_stats_cmperf.vremoteAccesses++;
2802 *avcp = tvc; /* May be null */
2804 ReleaseSharedLock(&afs_xvcache);
2805 return (tvc ? 1 : 0);
2807 } /*afs_NFSFindVCache */
2813 * Initialize vcache related variables
2818 afs_vcacheInit(int astatSize)
2820 #if !defined(AFS_LINUX22_ENV)
2821 register struct vcache *tvp;
2824 if (!afs_maxvcount) {
2825 afs_maxvcount = astatSize; /* no particular limit on linux? */
2827 #if !defined(AFS_LINUX22_ENV)
2831 AFS_RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
2832 LOCK_INIT(&afs_xvcb, "afs_xvcb");
2834 #if !defined(AFS_LINUX22_ENV)
2835 /* Allocate and thread the struct vcache entries */
2836 tvp = (struct vcache *)afs_osi_Alloc(astatSize * sizeof(struct vcache));
2837 memset(tvp, 0, sizeof(struct vcache) * astatSize);
2839 Initial_freeVCList = tvp;
2840 freeVCList = &(tvp[0]);
2841 for (i = 0; i < astatSize - 1; i++) {
2842 tvp[i].nextfree = &(tvp[i + 1]);
2844 tvp[astatSize - 1].nextfree = NULL;
2845 # ifdef KERNEL_HAVE_PIN
2846 pin((char *)tvp, astatSize * sizeof(struct vcache)); /* XXX */
2850 #if defined(AFS_SGI_ENV)
2851 for (i = 0; i < astatSize; i++) {
2852 char name[METER_NAMSZ];
2853 struct vcache *tvc = &tvp[i];
2855 tvc->v.v_number = ++afsvnumbers;
2856 tvc->vc_rwlockid = OSI_NO_LOCKID;
2857 initnsema(&tvc->vc_rwlock, 1,
2858 makesname(name, "vrw", tvc->v.v_number));
2859 #ifndef AFS_SGI53_ENV
2860 initnsema(&tvc->v.v_sync, 0, makesname(name, "vsy", tvc->v.v_number));
2862 #ifndef AFS_SGI62_ENV
2863 initnlock(&tvc->v.v_lock, makesname(name, "vlk", tvc->v.v_number));
2864 #endif /* AFS_SGI62_ENV */
2868 for(i = 0; i < VCSIZE; ++i)
2869 QInit(&afs_vhashTV[i]);
2876 shutdown_vcache(void)
2879 struct afs_cbr *tsp;
2881 * XXX We may potentially miss some of the vcaches because if when
2882 * there are no free vcache entries and all the vcache entries are active
2883 * ones then we allocate an additional one - admittedly we almost never
2888 register struct afs_q *tq, *uq = NULL;
2889 register struct vcache *tvc;
2890 for (tq = VLRU.prev; tq != &VLRU; tq = uq) {
2894 osi_FreeSmallSpace(tvc->mvid);
2895 tvc->mvid = (struct VenusFid *)0;
2898 aix_gnode_rele(AFSTOV(tvc));
2900 if (tvc->linkData) {
2901 afs_osi_Free(tvc->linkData, strlen(tvc->linkData) + 1);
2906 * Also free the remaining ones in the Cache
2908 for (i = 0; i < VCSIZE; i++) {
2909 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2911 osi_FreeSmallSpace(tvc->mvid);
2912 tvc->mvid = (struct VenusFid *)0;
2916 afs_osi_Free(tvc->v.v_gnode, sizeof(struct gnode));
2917 #ifdef AFS_AIX32_ENV
2920 vms_delete(tvc->segid);
2922 tvc->segid = tvc->vmh = NULL;
2923 if (VREFCOUNT_GT(tvc,0))
2924 osi_Panic("flushVcache: vm race");
2932 #if defined(AFS_SUN5_ENV)
2938 if (tvc->linkData) {
2939 afs_osi_Free(tvc->linkData, strlen(tvc->linkData) + 1);
2944 afs_FreeAllAxs(&(tvc->Access));
2950 * Free any leftover callback queue
2952 for (i = 0; i < afs_stats_cmperf.CallBackAlloced; i++) {
2953 tsp = afs_cbrHeads[i];
2954 afs_cbrHeads[i] = 0;
2955 afs_osi_Free((char *)tsp, AFS_NCBRS * sizeof(struct afs_cbr));
2959 #if !defined(AFS_LINUX22_ENV)
2960 afs_osi_Free(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
2962 # ifdef KERNEL_HAVE_PIN
2963 unpin(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
2966 freeVCList = Initial_freeVCList = 0;
2969 AFS_RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
2970 LOCK_INIT(&afs_xvcb, "afs_xvcb");
2972 for(i = 0; i < VCSIZE; ++i)
2973 QInit(&afs_vhashTV[i]);
2977 afs_DisconGiveUpCallbacks(void)
2983 ObtainWriteLock(&afs_xvcache, 1002); /* XXX - should be a unique number */
2985 /* Somehow, walk the set of vcaches, with each one coming out as tvc */
2986 for (i = 0; i < VCSIZE; i++) {
2987 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2988 if (afs_QueueVCB(tvc)) {
2989 tvc->callback = NULL;
2995 ReleaseWriteLock(&afs_xvcache);
3002 * Clear the Statd flag from all vcaches
3004 * This function removes the Statd flag from all vcaches. It's used by
3005 * disconnected mode to tidy up during reconnection
3009 afs_ClearAllStatdFlag(void)
3014 ObtainWriteLock(&afs_xvcache, 715);
3016 for (i = 0; i < VCSIZE; i++) {
3017 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
3018 tvc->f.states &= ~(CStatd|CUnique);
3021 ReleaseWriteLock(&afs_xvcache);