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"
44 #include "afs/sysincludes.h" /*Standard vendor system headers */
45 #include "afsincludes.h" /*AFS-based standard headers */
46 #include "afs/afs_stats.h"
47 #include "afs/afs_cbqueue.h"
48 #include "afs/afs_osidnlc.h"
50 afs_int32 afs_maxvcount = 0; /* max number of vcache entries */
51 afs_int32 afs_vcount = 0; /* number of vcache in use now */
59 #endif /* AFS_SGI64_ENV */
61 /* Exported variables */
63 afs_rwlock_t afs_xvcdirty; /*Lock: discon vcache dirty list mgmt */
65 afs_rwlock_t afs_xvcache; /*Lock: alloc new stat cache entries */
66 afs_rwlock_t afs_xvreclaim; /*Lock: entries reclaimed, not on free list */
67 afs_lock_t afs_xvcb; /*Lock: fids on which there are callbacks */
68 #if !defined(AFS_LINUX22_ENV)
69 static struct vcache *freeVCList; /*Free list for stat cache entries */
70 struct vcache *ReclaimedVCList; /*Reclaimed list for stat entries */
71 static struct vcache *Initial_freeVCList; /*Initial list for above */
73 struct afs_q VLRU; /*vcache LRU */
74 afs_int32 vcachegen = 0;
75 unsigned int afs_paniconwarn = 0;
76 struct vcache *afs_vhashT[VCSIZE];
77 struct afs_q afs_vhashTV[VCSIZE];
78 static struct afs_cbr *afs_cbrHashT[CBRSIZE];
79 afs_int32 afs_bulkStatsLost;
80 int afs_norefpanic = 0;
83 /* Disk backed vcache definitions
84 * Both protected by xvcache */
86 static int afs_nextVcacheSlot = 0;
87 static struct afs_slotlist *afs_freeSlotList = NULL;
90 /* Forward declarations */
91 static afs_int32 afs_QueueVCB(struct vcache *avc);
94 * Generate an index into the hash table for a given Fid.
96 * \return The hash value.
99 afs_HashCBRFid(struct AFSFid *fid)
101 return (fid->Volume + fid->Vnode + fid->Unique) % CBRSIZE;
105 * Insert a CBR entry into the hash table.
106 * Must be called with afs_xvcb held.
111 afs_InsertHashCBR(struct afs_cbr *cbr)
113 int slot = afs_HashCBRFid(&cbr->fid);
115 cbr->hash_next = afs_cbrHashT[slot];
116 if (afs_cbrHashT[slot])
117 afs_cbrHashT[slot]->hash_pprev = &cbr->hash_next;
119 cbr->hash_pprev = &afs_cbrHashT[slot];
120 afs_cbrHashT[slot] = cbr;
125 * Flush the given vcache entry.
128 * afs_xvcache lock must be held for writing upon entry to
129 * prevent people from changing the vrefCount field, and to
130 * protect the lruq and hnext fields.
131 * LOCK: afs_FlushVCache afs_xvcache W
132 * REFCNT: vcache ref count must be zero on entry except for osf1
133 * RACE: lock is dropped and reobtained, permitting race in caller
135 * \param avc Pointer to vcache entry to flush.
136 * \param slept Pointer to int to set 1 if we sleep/drop locks, 0 if we don't.
140 afs_FlushVCache(struct vcache *avc, int *slept)
141 { /*afs_FlushVCache */
144 struct vcache **uvc, *wvc;
147 AFS_STATCNT(afs_FlushVCache);
148 afs_Trace2(afs_iclSetp, CM_TRACE_FLUSHV, ICL_TYPE_POINTER, avc,
149 ICL_TYPE_INT32, avc->f.states);
151 code = osi_VM_FlushVCache(avc, slept);
155 if (avc->f.states & CVFlushed) {
159 #if !defined(AFS_LINUX22_ENV)
160 if (avc->nextfree || !avc->vlruq.prev || !avc->vlruq.next) { /* qv afs.h */
161 refpanic("LRU vs. Free inconsistency");
164 avc->f.states |= CVFlushed;
165 /* pull the entry out of the lruq and put it on the free list */
166 QRemove(&avc->vlruq);
168 /* keep track of # of files that we bulk stat'd, but never used
169 * before they got recycled.
171 if (avc->f.states & CBulkStat)
174 /* remove entry from the hash chain */
175 i = VCHash(&avc->f.fid);
176 uvc = &afs_vhashT[i];
177 for (wvc = *uvc; wvc; uvc = &wvc->hnext, wvc = *uvc) {
180 avc->hnext = (struct vcache *)NULL;
185 /* remove entry from the volume hash table */
186 QRemove(&avc->vhashq);
189 osi_FreeSmallSpace(avc->mvid);
190 avc->mvid = (struct VenusFid *)0;
192 afs_osi_Free(avc->linkData, strlen(avc->linkData) + 1);
193 avc->linkData = NULL;
195 #if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV)
196 /* OK, there are no internal vrefCounts, so there shouldn't
197 * be any more refs here. */
199 #ifdef AFS_DARWIN80_ENV
200 vnode_clearfsnode(AFSTOV(avc));
201 vnode_removefsref(AFSTOV(avc));
203 avc->v->v_data = NULL; /* remove from vnode */
205 AFSTOV(avc) = NULL; /* also drop the ptr to vnode */
208 #ifdef AFS_SUN510_ENV
209 /* As we use private vnodes, cleanup is up to us */
210 vn_reinit(AFSTOV(avc));
212 afs_FreeAllAxs(&(avc->Access));
214 ObtainWriteLock(&afs_xcbhash, 460);
215 afs_DequeueCallback(avc); /* remove it from queued callbacks list */
216 avc->f.states &= ~(CStatd | CUnique);
217 ReleaseWriteLock(&afs_xcbhash);
218 if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
219 osi_dnlc_purgedp(avc); /* if it (could be) a directory */
221 osi_dnlc_purgevp(avc);
224 * Next, keep track of which vnodes we've deleted for create's
225 * optimistic synchronization algorithm
228 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 */
245 if (VREFCOUNT_GT(avc,0)) {
246 AFS_RELE(AFSTOV(avc));
247 afs_stats_cmperf.vcacheXAllocs--;
249 if (afs_norefpanic) {
250 printf("flush vc refcnt < 1");
253 osi_Panic("flush vc refcnt < 1");
255 #endif /* AFS_LINUX22_ENV */
260 } /*afs_FlushVCache */
264 * The core of the inactive vnode op for all but IRIX.
270 afs_InactiveVCache(struct vcache *avc, afs_ucred_t *acred)
272 AFS_STATCNT(afs_inactive);
273 if (avc->f.states & CDirty) {
274 /* we can't keep trying to push back dirty data forever. Give up. */
275 afs_InvalidateAllSegments(avc); /* turns off dirty bit */
277 avc->f.states &= ~CMAPPED; /* mainly used by SunOS 4.0.x */
278 avc->f.states &= ~CDirty; /* Turn it off */
279 if (avc->f.states & CUnlinked) {
280 if (CheckLock(&afs_xvcache) || CheckLock(&afs_xdcache)) {
281 avc->f.states |= CUnlinkedDel;
284 afs_remunlink(avc, 1); /* ignore any return code */
291 * Allocate a callback return structure from the
292 * free list and return it.
294 * Environment: The alloc and free routines are both called with the afs_xvcb lock
295 * held, so we don't have to worry about blocking in osi_Alloc.
297 * \return The allocated afs_cbr.
299 static struct afs_cbr *afs_cbrSpace = 0;
300 /* if alloc limit below changes, fix me! */
301 static struct afs_cbr *afs_cbrHeads[2];
305 register struct afs_cbr *tsp;
308 while (!afs_cbrSpace) {
309 if (afs_stats_cmperf.CallBackAlloced >= 2) {
310 /* don't allocate more than 2 * AFS_NCBRS for now */
312 afs_stats_cmperf.CallBackFlushes++;
316 (struct afs_cbr *)afs_osi_Alloc(AFS_NCBRS *
317 sizeof(struct afs_cbr));
318 for (i = 0; i < AFS_NCBRS - 1; i++) {
319 tsp[i].next = &tsp[i + 1];
321 tsp[AFS_NCBRS - 1].next = 0;
323 afs_cbrHeads[afs_stats_cmperf.CallBackAlloced] = tsp;
324 afs_stats_cmperf.CallBackAlloced++;
328 afs_cbrSpace = tsp->next;
333 * Free a callback return structure, removing it from all lists.
335 * Environment: the xvcb lock is held over these calls.
337 * \param asp The address of the structure to free.
342 afs_FreeCBR(register struct afs_cbr *asp)
344 *(asp->pprev) = asp->next;
346 asp->next->pprev = asp->pprev;
348 *(asp->hash_pprev) = asp->hash_next;
350 asp->hash_next->hash_pprev = asp->hash_pprev;
352 asp->next = afs_cbrSpace;
358 * Flush all queued callbacks to all servers.
360 * Environment: holds xvcb lock over RPC to guard against race conditions
361 * when a new callback is granted for the same file later on.
363 * \return 0 for success.
366 afs_FlushVCBs(afs_int32 lockit)
368 struct AFSFid *tfids;
369 struct AFSCallBack callBacks[1];
370 struct AFSCBFids fidArray;
371 struct AFSCBs cbArray;
373 struct afs_cbr *tcbrp;
377 struct vrequest treq;
379 int safety1, safety2, safety3;
381 if ((code = afs_InitReq(&treq, afs_osi_credp)))
383 treq.flags |= O_NONBLOCK;
384 tfids = afs_osi_Alloc(sizeof(struct AFSFid) * AFS_MAXCBRSCALL);
387 ObtainWriteLock(&afs_xvcb, 273);
388 ObtainReadLock(&afs_xserver);
389 for (i = 0; i < NSERVERS; i++) {
390 for (safety1 = 0, tsp = afs_servers[i];
391 tsp && safety1 < afs_totalServers + 10;
392 tsp = tsp->next, safety1++) {
394 if (tsp->cbrs == (struct afs_cbr *)0)
397 /* otherwise, grab a block of AFS_MAXCBRSCALL from the list
398 * and make an RPC, over and over again.
400 tcount = 0; /* number found so far */
401 for (safety2 = 0; safety2 < afs_cacheStats; safety2++) {
402 if (tcount >= AFS_MAXCBRSCALL || !tsp->cbrs) {
403 /* if buffer is full, or we've queued all we're going
404 * to from this server, we should flush out the
407 fidArray.AFSCBFids_len = tcount;
408 fidArray.AFSCBFids_val = (struct AFSFid *)tfids;
409 cbArray.AFSCBs_len = 1;
410 cbArray.AFSCBs_val = callBacks;
411 memset(&callBacks[0], 0, sizeof(callBacks[0]));
412 callBacks[0].CallBackType = CB_EXCLUSIVE;
413 for (safety3 = 0; safety3 < AFS_MAXHOSTS * 2; safety3++) {
414 tc = afs_ConnByHost(tsp, tsp->cell->fsport,
415 tsp->cell->cellNum, &treq, 0,
419 (AFS_STATS_FS_RPCIDX_GIVEUPCALLBACKS);
422 RXAFS_GiveUpCallBacks(tc->id, &fidArray,
430 AFS_STATS_FS_RPCIDX_GIVEUPCALLBACKS, SHARED_LOCK,
435 /* ignore return code, since callbacks may have
436 * been returned anyway, we shouldn't leave them
437 * around to be returned again.
439 * Next, see if we are done with this server, and if so,
440 * break to deal with the next one.
446 /* if to flush full buffer */
447 /* if we make it here, we have an entry at the head of cbrs,
448 * which we should copy to the file ID array and then free.
451 tfids[tcount++] = tcbrp->fid;
453 /* Freeing the CBR will unlink it from the server's CBR list */
455 } /* while loop for this one server */
456 if (safety2 > afs_cacheStats) {
457 afs_warn("possible internal error afs_flushVCBs (%d)\n",
460 } /* for loop for this hash chain */
461 } /* loop through all hash chains */
462 if (safety1 > afs_totalServers + 2) {
464 ("AFS internal error (afs_flushVCBs) (%d > %d), continuing...\n",
465 safety1, afs_totalServers + 2);
467 osi_Panic("afs_flushVCBS safety1");
470 ReleaseReadLock(&afs_xserver);
472 ReleaseWriteLock(&afs_xvcb);
473 afs_osi_Free(tfids, sizeof(struct AFSFid) * AFS_MAXCBRSCALL);
478 * Queue a callback on the given fid.
481 * Locks the xvcb lock.
482 * Called when the xvcache lock is already held.
484 * \param avc vcache entry
485 * \return 1 if queued, 0 otherwise
489 afs_QueueVCB(struct vcache *avc)
493 struct afs_cbr *tcbp;
495 AFS_STATCNT(afs_QueueVCB);
497 ObtainWriteLock(&afs_xvcb, 274);
499 /* we can't really give back callbacks on RO files, since the
500 * server only tracks them on a per-volume basis, and we don't
501 * know whether we still have some other files from the same
503 if (!((avc->f.states & CRO) == 0 && avc->callback)) {
507 /* The callback is really just a struct server ptr. */
508 tsp = (struct server *)(avc->callback);
510 /* we now have a pointer to the server, so we just allocate
511 * a queue entry and queue it.
513 tcbp = afs_AllocCBR();
514 tcbp->fid = avc->f.fid.Fid;
516 tcbp->next = tsp->cbrs;
518 tsp->cbrs->pprev = &tcbp->next;
521 tcbp->pprev = &tsp->cbrs;
523 afs_InsertHashCBR(tcbp);
527 /* now release locks and return */
528 ReleaseWriteLock(&afs_xvcb);
534 * Remove a queued callback for a given Fid.
537 * Locks xvcb and xserver locks.
538 * Typically called with xdcache, xvcache and/or individual vcache
541 * \param afid The fid we want cleansed of queued callbacks.
546 afs_RemoveVCB(struct VenusFid *afid)
549 struct afs_cbr *cbr, *ncbr;
551 AFS_STATCNT(afs_RemoveVCB);
552 ObtainWriteLock(&afs_xvcb, 275);
554 slot = afs_HashCBRFid(&afid->Fid);
555 ncbr = afs_cbrHashT[slot];
559 ncbr = cbr->hash_next;
561 if (afid->Fid.Volume == cbr->fid.Volume &&
562 afid->Fid.Vnode == cbr->fid.Vnode &&
563 afid->Fid.Unique == cbr->fid.Unique) {
568 ReleaseWriteLock(&afs_xvcb);
572 afs_FlushReclaimedVcaches(void)
574 #if !defined(AFS_LINUX22_ENV)
577 struct vcache *tmpReclaimedVCList = NULL;
579 ObtainWriteLock(&afs_xvreclaim, 76);
580 while (ReclaimedVCList) {
581 tvc = ReclaimedVCList; /* take from free list */
582 ReclaimedVCList = tvc->nextfree;
583 tvc->nextfree = NULL;
584 code = afs_FlushVCache(tvc, &fv_slept);
586 /* Ok, so, if we got code != 0, uh, wtf do we do? */
587 /* Probably, build a temporary list and then put all back when we
588 get to the end of the list */
589 /* This is actually really crappy, but we need to not leak these.
590 We probably need a way to be smarter about this. */
591 tvc->nextfree = tmpReclaimedVCList;
592 tmpReclaimedVCList = tvc;
593 printf("Reclaim list flush %lx failed: %d\n", (unsigned long) tvc, code);
595 if (tvc->f.states & (CVInit
596 #ifdef AFS_DARWIN80_ENV
600 tvc->f.states &= ~(CVInit
601 #ifdef AFS_DARWIN80_ENV
605 afs_osi_Wakeup(&tvc->f.states);
608 if (tmpReclaimedVCList)
609 ReclaimedVCList = tmpReclaimedVCList;
611 ReleaseWriteLock(&afs_xvreclaim);
616 afs_ShakeLooseVCaches(afs_int32 anumber)
618 #if defined(AFS_LINUX22_ENV)
621 struct afs_q *tq, *uq;
623 afs_int32 target = anumber;
625 if (afsd_dynamic_vcaches || afs_vcount >= afs_maxvcount) {
627 for (tq = VLRU.prev; tq != &VLRU && anumber > 0; tq = uq) {
630 if (tvc->f.states & CVFlushed) {
631 refpanic("CVFlushed on VLRU");
632 } else if (!afsd_dynamic_vcaches && i++ > afs_maxvcount) {
633 refpanic("Exceeded pool of AFS vnodes(VLRU cycle?)");
634 } else if (QNext(uq) != tq) {
635 refpanic("VLRU inconsistent");
636 } else if (!VREFCOUNT_GT(tvc,0)) {
637 refpanic("refcnt 0 on VLRU");
640 #if defined(AFS_LINUX22_ENV)
641 if (tvc != afs_globalVp && VREFCOUNT(tvc) > 1 && tvc->opens == 0) {
642 struct dentry *dentry;
643 struct list_head *cur, *head;
645 #if defined(AFS_LINUX24_ENV)
646 spin_lock(&dcache_lock);
647 #endif /* AFS_LINUX24_ENV */
648 head = &(AFSTOV(tvc))->i_dentry;
652 while ((cur = cur->next) != head) {
653 dentry = list_entry(cur, struct dentry, d_alias);
655 if (d_unhashed(dentry))
660 #if defined(AFS_LINUX24_ENV)
661 spin_unlock(&dcache_lock);
662 #endif /* AFS_LINUX24_ENV */
663 if (d_invalidate(dentry) == -EBUSY) {
665 /* perhaps lock and try to continue? (use cur as head?) */
669 #if defined(AFS_LINUX24_ENV)
670 spin_lock(&dcache_lock);
671 #endif /* AFS_LINUX24_ENV */
674 #if defined(AFS_LINUX24_ENV)
675 spin_unlock(&dcache_lock);
676 #endif /* AFS_LINUX24_ENV */
680 #endif /* AFS_LINUX22_ENV */
682 if (VREFCOUNT_GT(tvc,0) && !VREFCOUNT_GT(tvc,1) &&
684 && (tvc->f.states & CUnlinkedDel) == 0) {
685 code = afs_FlushVCache(tvc, &fv_slept);
692 continue; /* start over - may have raced. */
698 if (!afsd_dynamic_vcaches && anumber == target) {
699 printf("afs_ShakeLooseVCaches: warning none freed, using %d of %d\n",
700 afs_vcount, afs_maxvcount);
702 } /* finished freeing up space */
704 printf("recycled %d entries\n", target-anumber);
710 /* Alloc new vnode. */
712 static struct vcache *
713 afs_AllocVCache(void)
716 #if defined(AFS_LINUX22_ENV)
720 ip = new_inode(afs_globalVFS);
722 osi_Panic("afs_AllocVCache: no more inodes");
724 #if defined(STRUCT_SUPER_HAS_ALLOC_INODE)
727 tvc = afs_osi_Alloc(sizeof(struct vcache));
728 ip->u.generic_ip = tvc;
735 if (afsd_dynamic_vcaches && afs_maxvcount < afs_vcount) {
736 afs_maxvcount = afs_vcount;
737 /*printf("peak vnodes: %d\n", afs_maxvcount);*/
740 afs_stats_cmperf.vcacheXAllocs++; /* count in case we have a leak */
742 /* none free, making one is better than a panic */
743 afs_stats_cmperf.vcacheXAllocs++; /* count in case we have a leak */
744 tvc = (struct vcache *)afs_osi_Alloc(sizeof(struct vcache));
745 #if defined(AFS_DARWIN_ENV) && !defined(UKERNEL)
746 tvc->v = NULL; /* important to clean this, or use memset 0 */
748 #ifdef KERNEL_HAVE_PIN
749 pin((char *)tvc, sizeof(struct vcache)); /* XXX */
751 #if defined(AFS_SGI_ENV)
753 char name[METER_NAMSZ];
754 memset(tvc, 0, sizeof(struct vcache));
755 tvc->v.v_number = ++afsvnumbers;
756 tvc->vc_rwlockid = OSI_NO_LOCKID;
757 initnsema(&tvc->vc_rwlock, 1,
758 makesname(name, "vrw", tvc->v.v_number));
759 #ifndef AFS_SGI53_ENV
760 initnsema(&tvc->v.v_sync, 0,
761 makesname(name, "vsy", tvc->v.v_number));
763 #ifndef AFS_SGI62_ENV
764 initnlock(&tvc->v.v_lock,
765 makesname(name, "vlk", tvc->v.v_number));
768 #endif /* AFS_SGI_ENV */
770 #ifdef AFS_DISCON_ENV
771 /* If we create a new inode, we either give it a new slot number,
772 * or if one's available, use a slot number from the slot free list
774 if (afs_freeSlotList != NULL) {
775 struct afs_slotlist *tmp;
777 tvc->diskSlot = afs_freeSlotList->slot;
778 tmp = afs_freeSlotList;
779 afs_freeSlotList = tmp->next;
780 afs_osi_Free(tmp, sizeof(struct afs_slotlist));
782 tvc->diskSlot = afs_nextVcacheSlot++;
790 * This routine is responsible for allocating a new cache entry
791 * from the free list. It formats the cache entry and inserts it
792 * into the appropriate hash tables. It must be called with
793 * afs_xvcache write-locked so as to prevent several processes from
794 * trying to create a new cache entry simultaneously.
796 * LOCK: afs_NewVCache afs_xvcache W
798 * \param afid The file id of the file whose cache entry is being created.
800 * \return The new vcache struct.
803 afs_NewVCache(struct VenusFid *afid, struct server *serverp)
807 afs_int32 anumber = VCACHE_FREE;
809 struct gnode *gnodepnt;
811 #if !defined(AFS_LINUX22_ENV)
812 struct afs_q *tq, *uq;
816 AFS_STATCNT(afs_NewVCache);
818 afs_FlushReclaimedVcaches();
820 #if defined(AFS_LINUX22_ENV)
821 if(!afsd_dynamic_vcaches) {
822 afs_ShakeLooseVCaches(anumber);
823 if (afs_vcount >= afs_maxvcount) {
824 printf("afs_NewVCache - none freed\n");
828 tvc = afs_AllocVCache();
829 #else /* AFS_LINUX22_ENV */
830 /* pull out a free cache entry */
834 for (tq = VLRU.prev; (anumber > 0) && (tq != &VLRU); tq = uq) {
838 if (tvc->f.states & CVFlushed) {
839 refpanic("CVFlushed on VLRU");
840 } else if (i++ > 2 * afs_cacheStats) { /* even allowing for a few xallocs... */
841 refpanic("Increase -stat parameter of afsd(VLRU cycle?)");
842 } else if (QNext(uq) != tq) {
843 refpanic("VLRU inconsistent");
844 } else if (tvc->f.states & CVInit) {
848 if (!VREFCOUNT_GT(tvc,0)
849 #if defined(AFS_DARWIN_ENV) && !defined(UKERNEL) && !defined(AFS_DARWIN80_ENV)
850 || ((VREFCOUNT(tvc) == 1) &&
851 (UBCINFOEXISTS(AFSTOV(tvc))))
853 && tvc->opens == 0 && (tvc->f.states & CUnlinkedDel) == 0) {
854 #if defined (AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
855 #ifdef AFS_DARWIN80_ENV
856 vnode_t tvp = AFSTOV(tvc);
857 /* VREFCOUNT_GT only sees usecounts, not iocounts */
858 /* so this may fail to actually recycle the vnode now */
859 /* must call vnode_get to avoid races. */
861 if (vnode_get(tvp) == 0) {
863 /* must release lock, since vnode_put will immediately
864 reclaim if there are no other users */
865 ReleaseWriteLock(&afs_xvcache);
870 ObtainWriteLock(&afs_xvcache, 336);
872 /* we can't use the vnode_recycle return value to figure
873 * this out, since the iocount we have to hold makes it
875 if (AFSTOV(tvc) == tvp) {
876 if (anumber > 0 && fv_slept) {
877 QRemove(&tvc->vlruq);
878 QAdd(&VLRU, &tvc->vlruq);
883 #else /* AFS_DARWIN80_ENV */
885 * vgone() reclaims the vnode, which calls afs_FlushVCache(),
886 * then it puts the vnode on the free list.
887 * If we don't do this we end up with a cleaned vnode that's
888 * not on the free list.
889 * XXX assume FreeBSD is the same for now.
897 #else /* AFS_DARWIN80_ENV || AFS_XBSD_ENV */
898 code = afs_FlushVCache(tvc, &fv_slept);
899 #endif /* AFS_DARWIN80_ENV || AFS_XBSD_ENV */
908 continue; /* start over - may have raced. */
914 } /* end of if (!freeVCList) */
917 tvc = afs_AllocVCache();
919 tvc = freeVCList; /* take from free list */
920 freeVCList = tvc->nextfree;
921 tvc->nextfree = NULL;
922 } /* end of if (!freeVCList) */
924 #endif /* AFS_LINUX22_ENV */
926 #if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV)
928 panic("afs_NewVCache(): free vcache with vnode attached");
931 #if !defined(AFS_SGI_ENV) && !defined(AFS_LINUX22_ENV)
933 #if defined(AFS_DISCON_ENV)
934 /* We need to preserve the slot that we're being stored into on
938 slot = tvc->diskSlot;
939 memset(tvc, 0, sizeof(struct vcache));
940 tvc->diskSlot = slot;
943 memset(tvc, 0, sizeof(struct vcache));
948 memset(&(tvc->f), 0, sizeof(struct fvcache));
951 AFS_RWLOCK_INIT(&tvc->lock, "vcache lock");
952 #if defined(AFS_SUN5_ENV)
953 AFS_RWLOCK_INIT(&tvc->vlock, "vcache vlock");
954 #endif /* defined(AFS_SUN5_ENV) */
957 tvc->linkData = NULL;
960 tvc->execsOrWriters = 0;
962 tvc->f.states = CVInit;
963 tvc->last_looker = 0;
965 tvc->asynchrony = -1;
967 #if defined(AFS_LINUX26_ENV)
971 tvc->flushDV.low = tvc->flushDV.high = AFS_MAXDV;
974 tvc->f.truncPos = AFS_NOTRUNC; /* don't truncate until we need to */
975 hzero(tvc->f.m.DataVersion); /* in case we copy it into flushDV */
977 tvc->callback = serverp; /* to minimize chance that clear
979 #if defined(AFS_DISCON_ENV)
980 QZero(&tvc->metadirty);
986 tvc->hnext = afs_vhashT[i];
988 QAdd(&afs_vhashTV[j], &tvc->vhashq);
990 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
991 refpanic("NewVCache VLRU inconsistent");
993 QAdd(&VLRU, &tvc->vlruq); /* put in lruq */
994 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
995 refpanic("NewVCache VLRU inconsistent2");
997 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
998 refpanic("NewVCache VLRU inconsistent3");
1000 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
1001 refpanic("NewVCache VLRU inconsistent4");
1004 /* it should now be safe to drop the xvcache lock */
1006 ReleaseWriteLock(&afs_xvcache);
1008 afs_nbsd_getnewvnode(tvc); /* includes one refcount */
1010 ObtainWriteLock(&afs_xvcache,337);
1011 lockinit(&tvc->rwlock, PINOD, "vcache", 0, 0);
1013 #ifdef AFS_DARWIN_ENV
1014 ReleaseWriteLock(&afs_xvcache);
1016 afs_darwin_getnewvnode(tvc); /* includes one refcount */
1018 ObtainWriteLock(&afs_xvcache,338);
1019 #ifdef AFS_DARWIN80_ENV
1020 LOCKINIT(tvc->rwlock);
1022 lockinit(&tvc->rwlock, PINOD, "vcache", 0, 0);
1029 ReleaseWriteLock(&afs_xvcache);
1031 #if defined(AFS_FBSD60_ENV)
1032 if (getnewvnode(MOUNT_AFS, afs_globalVFS, &afs_vnodeops, &vp))
1033 #elif defined(AFS_FBSD50_ENV)
1034 if (getnewvnode(MOUNT_AFS, afs_globalVFS, afs_vnodeop_p, &vp))
1036 if (getnewvnode(VT_AFS, afs_globalVFS, afs_vnodeop_p, &vp))
1038 panic("afs getnewvnode"); /* can't happen */
1040 ObtainWriteLock(&afs_xvcache,339);
1041 if (tvc->v != NULL) {
1042 /* I'd like to know if this ever happens...
1043 * We don't drop global for the rest of this function,
1044 * so if we do lose the race, the other thread should
1045 * have found the same vnode and finished initializing
1046 * the vcache entry. Is it conceivable that this vcache
1047 * entry could be recycled during this interval? If so,
1048 * then there probably needs to be some sort of additional
1049 * mutual exclusion (an Embryonic flag would suffice).
1051 printf("afs_NewVCache: lost the race\n");
1055 tvc->v->v_data = tvc;
1056 lockinit(&tvc->rwlock, PINOD, "vcache", 0, 0);
1060 #if defined(AFS_LINUX22_ENV)
1061 /* Hold it for the LRU (should make count 2) */
1062 VN_HOLD(AFSTOV(tvc));
1063 #elif !(defined (AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV))
1064 VREFCOUNT_SET(tvc, 1); /* us */
1067 #ifdef AFS_AIX32_ENV
1068 LOCK_INIT(&tvc->pvmlock, "vcache pvmlock");
1069 tvc->vmh = tvc->segid = NULL;
1073 #if defined(AFS_CACHE_BYPASS)
1074 tvc->cachingStates = 0;
1075 tvc->cachingTransitions = 0;
1078 #ifdef AFS_BOZONLOCK_ENV
1079 #if defined(AFS_SUN5_ENV)
1080 rw_init(&tvc->rwlock, "vcache rwlock", RW_DEFAULT, NULL);
1082 #if defined(AFS_SUN55_ENV)
1083 /* This is required if the kaio (kernel aynchronous io)
1084 ** module is installed. Inside the kernel, the function
1085 ** check_vp( common/os/aio.c) checks to see if the kernel has
1086 ** to provide asynchronous io for this vnode. This
1087 ** function extracts the device number by following the
1088 ** v_data field of the vnode. If we do not set this field
1089 ** then the system panics. The value of the v_data field
1090 ** is not really important for AFS vnodes because the kernel
1091 ** does not do asynchronous io for regular files. Hence,
1092 ** for the time being, we fill up the v_data field with the
1093 ** vnode pointer itself. */
1094 tvc->v.v_data = (char *)tvc;
1095 #endif /* AFS_SUN55_ENV */
1097 afs_BozonInit(&tvc->pvnLock, tvc);
1100 /* initialize vnode data, note vrefCount is v.v_count */
1102 /* Don't forget to free the gnode space */
1103 tvc->v.v_gnode = gnodepnt =
1104 (struct gnode *)osi_AllocSmallSpace(sizeof(struct gnode));
1105 memset(gnodepnt, 0, sizeof(struct gnode));
1107 #ifdef AFS_SGI64_ENV
1108 memset((void *)&(tvc->vc_bhv_desc), 0, sizeof(tvc->vc_bhv_desc));
1109 bhv_desc_init(&(tvc->vc_bhv_desc), tvc, tvc, &Afs_vnodeops);
1110 #ifdef AFS_SGI65_ENV
1111 vn_bhv_head_init(&(tvc->v.v_bh), "afsvp");
1112 vn_bhv_insert_initial(&(tvc->v.v_bh), &(tvc->vc_bhv_desc));
1114 bhv_head_init(&(tvc->v.v_bh));
1115 bhv_insert_initial(&(tvc->v.v_bh), &(tvc->vc_bhv_desc));
1117 #ifdef AFS_SGI65_ENV
1118 tvc->v.v_mreg = tvc->v.v_mregb = (struct pregion *)tvc;
1119 #ifdef VNODE_TRACING
1120 tvc->v.v_trace = ktrace_alloc(VNODE_TRACE_SIZE, 0);
1122 init_bitlock(&tvc->v.v_pcacheflag, VNODE_PCACHE_LOCKBIT, "afs_pcache",
1124 init_mutex(&tvc->v.v_filocksem, MUTEX_DEFAULT, "afsvfl", (long)tvc);
1125 init_mutex(&tvc->v.v_buf_lock, MUTEX_DEFAULT, "afsvnbuf", (long)tvc);
1127 vnode_pcache_init(&tvc->v);
1128 #if defined(DEBUG) && defined(VNODE_INIT_BITLOCK)
1129 /* Above define is never true execpt in SGI test kernels. */
1130 init_bitlock(&(tvc->v.v_flag, VLOCK, "vnode", tvc->v.v_number);
1132 #ifdef INTR_KTHREADS
1133 AFS_VN_INIT_BUF_LOCK(&(tvc->v));
1136 SetAfsVnode(AFSTOV(tvc));
1137 #endif /* AFS_SGI64_ENV */
1139 * The proper value for mvstat (for root fids) is setup by the caller.
1142 if (afid->Fid.Vnode == 1 && afid->Fid.Unique == 1)
1144 if (afs_globalVFS == 0)
1145 osi_Panic("afs globalvfs");
1146 #if !defined(AFS_LINUX22_ENV)
1147 vSetVfsp(tvc, afs_globalVFS);
1149 vSetType(tvc, VREG);
1151 tvc->v.v_vfsnext = afs_globalVFS->vfs_vnodes; /* link off vfs */
1152 tvc->v.v_vfsprev = NULL;
1153 afs_globalVFS->vfs_vnodes = &tvc->v;
1154 if (tvc->v.v_vfsnext != NULL)
1155 tvc->v.v_vfsnext->v_vfsprev = &tvc->v;
1156 tvc->v.v_next = gnodepnt->gn_vnode; /*Single vnode per gnode for us! */
1157 gnodepnt->gn_vnode = &tvc->v;
1159 #ifdef AFS_FBSD70_ENV
1160 #ifndef AFS_FBSD80_ENV /* yup. they put it back. */
1161 insmntque(AFSTOV(tvc), afs_globalVFS);
1164 #if defined(AFS_SGI_ENV)
1165 VN_SET_DPAGES(&(tvc->v), (struct pfdat *)NULL);
1166 osi_Assert((tvc->v.v_flag & VINACT) == 0);
1168 osi_Assert(VN_GET_PGCNT(&(tvc->v)) == 0);
1169 osi_Assert(tvc->mapcnt == 0 && tvc->vc_locktrips == 0);
1170 osi_Assert(tvc->vc_rwlockid == OSI_NO_LOCKID);
1171 osi_Assert(tvc->v.v_filocks == NULL);
1172 #if !defined(AFS_SGI65_ENV)
1173 osi_Assert(tvc->v.v_filocksem == NULL);
1175 osi_Assert(tvc->cred == NULL);
1176 #ifdef AFS_SGI64_ENV
1177 vnode_pcache_reinit(&tvc->v);
1178 tvc->v.v_rdev = NODEV;
1180 vn_initlist((struct vnlist *)&tvc->v);
1182 #endif /* AFS_SGI_ENV */
1184 osi_dnlc_purgedp(tvc); /* this may be overkill */
1185 memset(&(tvc->callsort), 0, sizeof(struct afs_q));
1187 tvc->f.states &=~ CVInit;
1188 afs_osi_Wakeup(&tvc->f.states);
1192 } /*afs_NewVCache */
1198 * LOCK: afs_FlushActiveVcaches afs_xvcache N
1200 * \param doflocks : Do we handle flocks?
1203 afs_FlushActiveVcaches(register afs_int32 doflocks)
1205 register struct vcache *tvc;
1207 register struct afs_conn *tc;
1208 register afs_int32 code;
1209 afs_ucred_t *cred = NULL;
1210 struct vrequest treq, ureq;
1211 struct AFSVolSync tsync;
1214 AFS_STATCNT(afs_FlushActiveVcaches);
1215 ObtainReadLock(&afs_xvcache);
1216 for (i = 0; i < VCSIZE; i++) {
1217 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
1218 if (tvc->f.states & CVInit) continue;
1219 #ifdef AFS_DARWIN80_ENV
1220 if (tvc->f.states & CDeadVnode &&
1221 (tvc->f.states & (CCore|CUnlinkedDel) ||
1222 tvc->flockCount)) panic("Dead vnode has core/unlinkedel/flock");
1224 if (doflocks && tvc->flockCount != 0) {
1225 /* if this entry has an flock, send a keep-alive call out */
1227 ReleaseReadLock(&afs_xvcache);
1228 ObtainWriteLock(&tvc->lock, 51);
1230 afs_InitReq(&treq, afs_osi_credp);
1231 treq.flags |= O_NONBLOCK;
1233 tc = afs_Conn(&tvc->f.fid, &treq, SHARED_LOCK);
1235 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_EXTENDLOCK);
1238 RXAFS_ExtendLock(tc->id,
1239 (struct AFSFid *)&tvc->f.fid.Fid,
1245 } while (afs_Analyze
1246 (tc, code, &tvc->f.fid, &treq,
1247 AFS_STATS_FS_RPCIDX_EXTENDLOCK, SHARED_LOCK, NULL));
1249 ReleaseWriteLock(&tvc->lock);
1250 #ifdef AFS_DARWIN80_ENV
1252 ObtainReadLock(&afs_xvcache);
1254 ObtainReadLock(&afs_xvcache);
1259 if ((tvc->f.states & CCore) || (tvc->f.states & CUnlinkedDel)) {
1261 * Don't let it evaporate in case someone else is in
1262 * this code. Also, drop the afs_xvcache lock while
1263 * getting vcache locks.
1266 ReleaseReadLock(&afs_xvcache);
1267 #ifdef AFS_BOZONLOCK_ENV
1268 afs_BozonLock(&tvc->pvnLock, tvc);
1270 #if defined(AFS_SGI_ENV)
1272 * That's because if we come in via the CUnlinkedDel bit state path we'll be have 0 refcnt
1274 osi_Assert(VREFCOUNT_GT(tvc,0));
1275 AFS_RWLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1277 ObtainWriteLock(&tvc->lock, 52);
1278 if (tvc->f.states & CCore) {
1279 tvc->f.states &= ~CCore;
1280 /* XXXX Find better place-holder for cred XXXX */
1281 cred = (afs_ucred_t *)tvc->linkData;
1282 tvc->linkData = NULL; /* XXX */
1283 afs_InitReq(&ureq, cred);
1284 afs_Trace2(afs_iclSetp, CM_TRACE_ACTCCORE,
1285 ICL_TYPE_POINTER, tvc, ICL_TYPE_INT32,
1286 tvc->execsOrWriters);
1287 code = afs_StoreOnLastReference(tvc, &ureq);
1288 ReleaseWriteLock(&tvc->lock);
1289 #ifdef AFS_BOZONLOCK_ENV
1290 afs_BozonUnlock(&tvc->pvnLock, tvc);
1292 hzero(tvc->flushDV);
1295 if (code && code != VNOVNODE) {
1296 afs_StoreWarn(code, tvc->f.fid.Fid.Volume,
1297 /* /dev/console */ 1);
1299 } else if (tvc->f.states & CUnlinkedDel) {
1303 ReleaseWriteLock(&tvc->lock);
1304 #ifdef AFS_BOZONLOCK_ENV
1305 afs_BozonUnlock(&tvc->pvnLock, tvc);
1307 #if defined(AFS_SGI_ENV)
1308 AFS_RWUNLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1310 afs_remunlink(tvc, 0);
1311 #if defined(AFS_SGI_ENV)
1312 AFS_RWLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1315 /* lost (or won, perhaps) the race condition */
1316 ReleaseWriteLock(&tvc->lock);
1317 #ifdef AFS_BOZONLOCK_ENV
1318 afs_BozonUnlock(&tvc->pvnLock, tvc);
1321 #if defined(AFS_SGI_ENV)
1322 AFS_RWUNLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1324 #ifdef AFS_DARWIN80_ENV
1327 AFS_RELE(AFSTOV(tvc));
1328 /* Matches write code setting CCore flag */
1331 ObtainReadLock(&afs_xvcache);
1333 ObtainReadLock(&afs_xvcache);
1336 AFS_RELE(AFSTOV(tvc));
1337 /* Matches write code setting CCore flag */
1344 ReleaseReadLock(&afs_xvcache);
1350 * Make sure a cache entry is up-to-date status-wise.
1352 * NOTE: everywhere that calls this can potentially be sped up
1353 * by checking CStatd first, and avoiding doing the InitReq
1354 * if this is up-to-date.
1356 * Anymore, the only places that call this KNOW already that the
1357 * vcache is not up-to-date, so we don't screw around.
1359 * \param avc : Ptr to vcache entry to verify.
1365 * Make sure a cache entry is up-to-date status-wise.
1367 * NOTE: everywhere that calls this can potentially be sped up
1368 * by checking CStatd first, and avoiding doing the InitReq
1369 * if this is up-to-date.
1371 * Anymore, the only places that call this KNOW already that the
1372 * vcache is not up-to-date, so we don't screw around.
1374 * \param avc Pointer to vcache entry to verify.
1377 * \return 0 for success or other error codes.
1380 afs_VerifyVCache2(struct vcache *avc, struct vrequest *areq)
1382 register struct vcache *tvc;
1384 AFS_STATCNT(afs_VerifyVCache);
1386 /* otherwise we must fetch the status info */
1388 ObtainWriteLock(&avc->lock, 53);
1389 if (avc->f.states & CStatd) {
1390 ReleaseWriteLock(&avc->lock);
1393 ObtainWriteLock(&afs_xcbhash, 461);
1394 avc->f.states &= ~(CStatd | CUnique);
1395 avc->callback = NULL;
1396 afs_DequeueCallback(avc);
1397 ReleaseWriteLock(&afs_xcbhash);
1398 ReleaseWriteLock(&avc->lock);
1400 /* since we've been called back, or the callback has expired,
1401 * it's possible that the contents of this directory, or this
1402 * file's name have changed, thus invalidating the dnlc contents.
1404 if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
1405 osi_dnlc_purgedp(avc);
1407 osi_dnlc_purgevp(avc);
1409 /* fetch the status info */
1410 tvc = afs_GetVCache(&avc->f.fid, areq, NULL, avc);
1413 /* Put it back; caller has already incremented vrefCount */
1417 } /*afs_VerifyVCache */
1421 * Simple copy of stat info into cache.
1423 * Callers:as of 1992-04-29, only called by WriteVCache
1425 * \param avc Ptr to vcache entry involved.
1426 * \param astat Ptr to stat info to copy.
1430 afs_SimpleVStat(register struct vcache *avc,
1431 register struct AFSFetchStatus *astat, struct vrequest *areq)
1434 AFS_STATCNT(afs_SimpleVStat);
1437 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1438 && !AFS_VN_MAPPED((vnode_t *) avc)) {
1440 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)) {
1442 #ifdef AFS_64BIT_CLIENT
1443 FillInt64(length, astat->Length_hi, astat->Length);
1444 #else /* AFS_64BIT_CLIENT */
1445 length = astat->Length;
1446 #endif /* AFS_64BIT_CLIENT */
1447 #if defined(AFS_SGI_ENV)
1448 osi_Assert((valusema(&avc->vc_rwlock) <= 0)
1449 && (OSI_GET_LOCKID() == avc->vc_rwlockid));
1450 if (length < avc->f.m.Length) {
1451 vnode_t *vp = (vnode_t *) avc;
1453 osi_Assert(WriteLocked(&avc->lock));
1454 ReleaseWriteLock(&avc->lock);
1456 PTOSSVP(vp, (off_t) length, (off_t) MAXLONG);
1458 ObtainWriteLock(&avc->lock, 67);
1461 /* if writing the file, don't fetch over this value */
1462 afs_Trace3(afs_iclSetp, CM_TRACE_SIMPLEVSTAT, ICL_TYPE_POINTER, avc,
1463 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length),
1464 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1465 avc->f.m.Length = length;
1466 avc->f.m.Date = astat->ClientModTime;
1468 avc->f.m.Owner = astat->Owner;
1469 avc->f.m.Group = astat->Group;
1470 avc->f.m.Mode = astat->UnixModeBits;
1471 if (vType(avc) == VREG) {
1472 avc->f.m.Mode |= S_IFREG;
1473 } else if (vType(avc) == VDIR) {
1474 avc->f.m.Mode |= S_IFDIR;
1475 } else if (vType(avc) == VLNK) {
1476 avc->f.m.Mode |= S_IFLNK;
1477 if ((avc->f.m.Mode & 0111) == 0)
1480 if (avc->f.states & CForeign) {
1481 struct axscache *ac;
1482 avc->f.anyAccess = astat->AnonymousAccess;
1484 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1486 * Caller has at least one bit not covered by anonymous, and
1487 * thus may have interesting rights.
1489 * HOWEVER, this is a really bad idea, because any access query
1490 * for bits which aren't covered by anonymous, on behalf of a user
1491 * who doesn't have any special rights, will result in an answer of
1492 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1493 * It's an especially bad idea under Ultrix, since (due to the lack of
1494 * a proper access() call) it must perform several afs_access() calls
1495 * in order to create magic mode bits that vary according to who makes
1496 * the call. In other words, _every_ stat() generates a test for
1499 #endif /* badidea */
1500 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1501 ac->axess = astat->CallerAccess;
1502 else /* not found, add a new one if possible */
1503 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1506 } /*afs_SimpleVStat */
1510 * Store the status info *only* back to the server for a
1513 * Environment: Must be called with a shared lock held on the vnode.
1515 * \param avc Ptr to the vcache entry.
1516 * \param astatus Ptr to the status info to store.
1517 * \param areq Ptr to the associated vrequest.
1519 * \return Operation status.
1523 afs_WriteVCache(register struct vcache *avc,
1524 register struct AFSStoreStatus *astatus,
1525 struct vrequest *areq)
1528 struct afs_conn *tc;
1529 struct AFSFetchStatus OutStatus;
1530 struct AFSVolSync tsync;
1532 AFS_STATCNT(afs_WriteVCache);
1533 afs_Trace2(afs_iclSetp, CM_TRACE_WVCACHE, ICL_TYPE_POINTER, avc,
1534 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length));
1536 tc = afs_Conn(&avc->f.fid, areq, SHARED_LOCK);
1538 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STORESTATUS);
1541 RXAFS_StoreStatus(tc->id, (struct AFSFid *)&avc->f.fid.Fid,
1542 astatus, &OutStatus, &tsync);
1547 } while (afs_Analyze
1548 (tc, code, &avc->f.fid, areq, AFS_STATS_FS_RPCIDX_STORESTATUS,
1549 SHARED_LOCK, NULL));
1551 UpgradeSToWLock(&avc->lock, 20);
1553 /* success, do the changes locally */
1554 afs_SimpleVStat(avc, &OutStatus, areq);
1556 * Update the date, too. SimpleVStat didn't do this, since
1557 * it thought we were doing this after fetching new status
1558 * over a file being written.
1560 avc->f.m.Date = OutStatus.ClientModTime;
1562 /* failure, set up to check with server next time */
1563 ObtainWriteLock(&afs_xcbhash, 462);
1564 afs_DequeueCallback(avc);
1565 avc->f.states &= ~(CStatd | CUnique); /* turn off stat valid flag */
1566 ReleaseWriteLock(&afs_xcbhash);
1567 if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
1568 osi_dnlc_purgedp(avc); /* if it (could be) a directory */
1570 ConvertWToSLock(&avc->lock);
1573 } /*afs_WriteVCache */
1574 #if defined(AFS_DISCON_ENV)
1577 * Store status info only locally, set the proper disconnection flags
1578 * and add to dirty list.
1580 * \param avc The vcache to be written locally.
1581 * \param astatus Get attr fields from local store.
1582 * \param attrs This one is only of the vs_size.
1584 * \note Must be called with a shared lock on the vnode
1586 int afs_WriteVCacheDiscon(register struct vcache *avc,
1587 register struct AFSStoreStatus *astatus,
1588 struct vattr *attrs)
1591 afs_int32 flags = 0;
1593 UpgradeSToWLock(&avc->lock, 700);
1595 if (!astatus->Mask) {
1601 /* Set attributes. */
1602 if (astatus->Mask & AFS_SETMODTIME) {
1603 avc->f.m.Date = astatus->ClientModTime;
1604 flags |= VDisconSetTime;
1607 if (astatus->Mask & AFS_SETOWNER) {
1608 printf("Not allowed yet. \n");
1609 /*avc->f.m.Owner = astatus->Owner;*/
1612 if (astatus->Mask & AFS_SETGROUP) {
1613 printf("Not allowed yet. \n");
1614 /*avc->f.m.Group = astatus->Group;*/
1617 if (astatus->Mask & AFS_SETMODE) {
1618 avc->f.m.Mode = astatus->UnixModeBits;
1620 #if 0 /* XXX: Leaving this out, so it doesn't mess up the file type flag.*/
1622 if (vType(avc) == VREG) {
1623 avc->f.m.Mode |= S_IFREG;
1624 } else if (vType(avc) == VDIR) {
1625 avc->f.m.Mode |= S_IFDIR;
1626 } else if (vType(avc) == VLNK) {
1627 avc->f.m.Mode |= S_IFLNK;
1628 if ((avc->f.m.Mode & 0111) == 0)
1632 flags |= VDisconSetMode;
1633 } /* if(astatus.Mask & AFS_SETMODE) */
1635 } /* if (!astatus->Mask) */
1637 if (attrs->va_size > 0) {
1638 /* XXX: Do I need more checks? */
1639 /* Truncation operation. */
1640 flags |= VDisconTrunc;
1644 afs_DisconAddDirty(avc, flags, 1);
1646 /* XXX: How about the rest of the fields? */
1648 ConvertWToSLock(&avc->lock);
1656 * Copy astat block into vcache info
1658 * \note This code may get dataversion and length out of sync if the file has
1659 * been modified. This is less than ideal. I haven't thought about it sufficiently
1660 * to be certain that it is adequate.
1662 * \note Environment: Must be called under a write lock
1664 * \param avc Ptr to vcache entry.
1665 * \param astat Ptr to stat block to copy in.
1666 * \param areq Ptr to associated request.
1669 afs_ProcessFS(register struct vcache *avc,
1670 register struct AFSFetchStatus *astat, struct vrequest *areq)
1673 AFS_STATCNT(afs_ProcessFS);
1675 #ifdef AFS_64BIT_CLIENT
1676 FillInt64(length, astat->Length_hi, astat->Length);
1677 #else /* AFS_64BIT_CLIENT */
1678 length = astat->Length;
1679 #endif /* AFS_64BIT_CLIENT */
1680 /* WARNING: afs_DoBulkStat uses the Length field to store a sequence
1681 * number for each bulk status request. Under no circumstances
1682 * should afs_DoBulkStat store a sequence number if the new
1683 * length will be ignored when afs_ProcessFS is called with
1684 * new stats. If you change the following conditional then you
1685 * also need to change the conditional in afs_DoBulkStat. */
1687 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1688 && !AFS_VN_MAPPED((vnode_t *) avc)) {
1690 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)) {
1692 /* if we're writing or mapping this file, don't fetch over these
1695 afs_Trace3(afs_iclSetp, CM_TRACE_PROCESSFS, ICL_TYPE_POINTER, avc,
1696 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length),
1697 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1698 avc->f.m.Length = length;
1699 avc->f.m.Date = astat->ClientModTime;
1701 hset64(avc->f.m.DataVersion, astat->dataVersionHigh, astat->DataVersion);
1702 avc->f.m.Owner = astat->Owner;
1703 avc->f.m.Mode = astat->UnixModeBits;
1704 avc->f.m.Group = astat->Group;
1705 avc->f.m.LinkCount = astat->LinkCount;
1706 if (astat->FileType == File) {
1707 vSetType(avc, VREG);
1708 avc->f.m.Mode |= S_IFREG;
1709 } else if (astat->FileType == Directory) {
1710 vSetType(avc, VDIR);
1711 avc->f.m.Mode |= S_IFDIR;
1712 } else if (astat->FileType == SymbolicLink) {
1713 if (afs_fakestat_enable && (avc->f.m.Mode & 0111) == 0) {
1714 vSetType(avc, VDIR);
1715 avc->f.m.Mode |= S_IFDIR;
1717 vSetType(avc, VLNK);
1718 avc->f.m.Mode |= S_IFLNK;
1720 if ((avc->f.m.Mode & 0111) == 0) {
1724 avc->f.anyAccess = astat->AnonymousAccess;
1726 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1728 * Caller has at least one bit not covered by anonymous, and
1729 * thus may have interesting rights.
1731 * HOWEVER, this is a really bad idea, because any access query
1732 * for bits which aren't covered by anonymous, on behalf of a user
1733 * who doesn't have any special rights, will result in an answer of
1734 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1735 * It's an especially bad idea under Ultrix, since (due to the lack of
1736 * a proper access() call) it must perform several afs_access() calls
1737 * in order to create magic mode bits that vary according to who makes
1738 * the call. In other words, _every_ stat() generates a test for
1741 #endif /* badidea */
1743 struct axscache *ac;
1744 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1745 ac->axess = astat->CallerAccess;
1746 else /* not found, add a new one if possible */
1747 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1749 } /*afs_ProcessFS */
1753 * Get fid from server.
1756 * \param areq Request to be passed on.
1757 * \param name Name of ?? to lookup.
1758 * \param OutStatus Fetch status.
1763 * \return Success status of operation.
1766 afs_RemoteLookup(register struct VenusFid *afid, struct vrequest *areq,
1767 char *name, struct VenusFid *nfid,
1768 struct AFSFetchStatus *OutStatusp,
1769 struct AFSCallBack *CallBackp, struct server **serverp,
1770 struct AFSVolSync *tsyncp)
1774 register struct afs_conn *tc;
1775 struct AFSFetchStatus OutDirStatus;
1778 name = ""; /* XXX */
1780 tc = afs_Conn(afid, areq, SHARED_LOCK);
1783 *serverp = tc->srvr->server;
1785 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_XLOOKUP);
1788 RXAFS_Lookup(tc->id, (struct AFSFid *)&afid->Fid, name,
1789 (struct AFSFid *)&nfid->Fid, OutStatusp,
1790 &OutDirStatus, CallBackp, tsyncp);
1795 } while (afs_Analyze
1796 (tc, code, afid, areq, AFS_STATS_FS_RPCIDX_XLOOKUP, SHARED_LOCK,
1806 * Given a file id and a vrequest structure, fetch the status
1807 * information associated with the file.
1809 * \param afid File ID.
1810 * \param areq Ptr to associated vrequest structure, specifying the
1811 * user whose authentication tokens will be used.
1812 * \param avc Caller may already have a vcache for this file, which is
1815 * \note Environment:
1816 * The cache entry is returned with an increased vrefCount field.
1817 * The entry must be discarded by calling afs_PutVCache when you
1818 * are through using the pointer to the cache entry.
1820 * You should not hold any locks when calling this function, except
1821 * locks on other vcache entries. If you lock more than one vcache
1822 * entry simultaneously, you should lock them in this order:
1824 * 1. Lock all files first, then directories.
1825 * 2. Within a particular type, lock entries in Fid.Vnode order.
1827 * This locking hierarchy is convenient because it allows locking
1828 * of a parent dir cache entry, given a file (to check its access
1829 * control list). It also allows renames to be handled easily by
1830 * locking directories in a constant order.
1832 * \note NB. NewVCache -> FlushVCache presently (4/10/95) drops the xvcache lock.
1834 * \note Might have a vcache structure already, which must
1835 * already be held by the caller
1838 afs_GetVCache(register struct VenusFid *afid, struct vrequest *areq,
1839 afs_int32 * cached, struct vcache *avc)
1842 afs_int32 code, newvcache = 0;
1843 register struct vcache *tvc;
1847 AFS_STATCNT(afs_GetVCache);
1850 *cached = 0; /* Init just in case */
1852 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1856 ObtainSharedLock(&afs_xvcache, 5);
1858 tvc = afs_FindVCache(afid, &retry, DO_STATS | DO_VLRU | IS_SLOCK);
1860 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1861 ReleaseSharedLock(&afs_xvcache);
1862 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1870 osi_Assert((tvc->f.states & CVInit) == 0);
1871 /* If we are in readdir, return the vnode even if not statd */
1872 if ((tvc->f.states & CStatd) || afs_InReadDir(tvc)) {
1873 ReleaseSharedLock(&afs_xvcache);
1877 UpgradeSToWLock(&afs_xvcache, 21);
1879 /* no cache entry, better grab one */
1880 tvc = afs_NewVCache(afid, NULL);
1883 ConvertWToSLock(&afs_xvcache);
1886 ReleaseSharedLock(&afs_xvcache);
1890 afs_stats_cmperf.vcacheMisses++;
1893 ReleaseSharedLock(&afs_xvcache);
1895 ObtainWriteLock(&tvc->lock, 54);
1897 if (tvc->f.states & CStatd) {
1898 ReleaseWriteLock(&tvc->lock);
1901 #ifdef AFS_DARWIN80_ENV
1902 /* Darwin 8.0 only has bufs in nfs, so we shouldn't have to worry about them.
1905 #if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
1907 * XXX - I really don't like this. Should try to understand better.
1908 * It seems that sometimes, when we get called, we already hold the
1909 * lock on the vnode (e.g., from afs_getattr via afs_VerifyVCache).
1910 * We can't drop the vnode lock, because that could result in a race.
1911 * Sometimes, though, we get here and don't hold the vnode lock.
1912 * I hate code paths that sometimes hold locks and sometimes don't.
1913 * In any event, the dodge we use here is to check whether the vnode
1914 * is locked, and if it isn't, then we gain and drop it around the call
1915 * to vinvalbuf; otherwise, we leave it alone.
1918 struct vnode *vp = AFSTOV(tvc);
1921 #if defined(AFS_DARWIN_ENV)
1922 iheldthelock = VOP_ISLOCKED(vp);
1924 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, current_proc());
1925 /* this is messy. we can call fsync which will try to reobtain this */
1926 if (VTOAFS(vp) == tvc)
1927 ReleaseWriteLock(&tvc->lock);
1928 if (UBCINFOEXISTS(vp)) {
1929 vinvalbuf(vp, V_SAVE, &afs_osi_cred, current_proc(), PINOD, 0);
1931 if (VTOAFS(vp) == tvc)
1932 ObtainWriteLock(&tvc->lock, 954);
1934 VOP_UNLOCK(vp, LK_EXCLUSIVE, current_proc());
1935 #elif defined(AFS_FBSD80_ENV)
1936 iheldthelock = VOP_ISLOCKED(vp);
1937 if (!iheldthelock) {
1938 /* nosleep/sleep lock order reversal */
1939 int glocked = ISAFS_GLOCK();
1942 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
1946 vinvalbuf(vp, V_SAVE, curthread, PINOD, 0);
1949 #elif defined(AFS_FBSD60_ENV)
1950 iheldthelock = VOP_ISLOCKED(vp, curthread);
1952 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread);
1953 vinvalbuf(vp, V_SAVE, curthread, PINOD, 0);
1955 VOP_UNLOCK(vp, LK_EXCLUSIVE, curthread);
1956 #elif defined(AFS_FBSD50_ENV)
1957 iheldthelock = VOP_ISLOCKED(vp, curthread);
1959 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread);
1960 vinvalbuf(vp, V_SAVE, osi_curcred(), curthread, PINOD, 0);
1962 VOP_UNLOCK(vp, LK_EXCLUSIVE, curthread);
1963 #elif defined(AFS_FBSD40_ENV)
1964 iheldthelock = VOP_ISLOCKED(vp, curproc);
1966 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curproc);
1967 vinvalbuf(vp, V_SAVE, osi_curcred(), curproc, PINOD, 0);
1969 VOP_UNLOCK(vp, LK_EXCLUSIVE, curproc);
1970 #elif defined(AFS_OBSD_ENV)
1971 iheldthelock = VOP_ISLOCKED(vp, curproc);
1973 VOP_LOCK(vp, LK_EXCLUSIVE | LK_RETRY, curproc);
1974 uvm_vnp_uncache(vp);
1976 VOP_UNLOCK(vp, 0, curproc);
1982 ObtainWriteLock(&afs_xcbhash, 464);
1983 tvc->f.states &= ~CUnique;
1985 afs_DequeueCallback(tvc);
1986 ReleaseWriteLock(&afs_xcbhash);
1988 /* It is always appropriate to throw away all the access rights? */
1989 afs_FreeAllAxs(&(tvc->Access));
1990 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-volume info */
1992 if ((tvp->states & VForeign)) {
1994 tvc->f.states |= CForeign;
1995 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
1996 && (tvp->rootUnique == afid->Fid.Unique)) {
2000 if (tvp->states & VRO)
2001 tvc->f.states |= CRO;
2002 if (tvp->states & VBackup)
2003 tvc->f.states |= CBackup;
2004 /* now copy ".." entry back out of volume structure, if necessary */
2005 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
2007 tvc->mvid = (struct VenusFid *)
2008 osi_AllocSmallSpace(sizeof(struct VenusFid));
2009 *tvc->mvid = tvp->dotdot;
2011 afs_PutVolume(tvp, READ_LOCK);
2015 afs_RemoveVCB(afid);
2017 struct AFSFetchStatus OutStatus;
2019 if (afs_DynrootNewVnode(tvc, &OutStatus)) {
2020 afs_ProcessFS(tvc, &OutStatus, areq);
2021 tvc->f.states |= CStatd | CUnique;
2022 tvc->f.parent.vnode = OutStatus.ParentVnode;
2023 tvc->f.parent.unique = OutStatus.ParentUnique;
2027 if (AFS_IS_DISCONNECTED) {
2028 /* Nothing to do otherwise...*/
2030 printf("Network is down in afs_GetCache");
2032 code = afs_FetchStatus(tvc, afid, areq, &OutStatus);
2034 /* For the NFS translator's benefit, make sure
2035 * non-directory vnodes always have their parent FID set
2036 * correctly, even when created as a result of decoding an
2037 * NFS filehandle. It would be nice to also do this for
2038 * directories, but we can't because the fileserver fills
2039 * in the FID of the directory itself instead of that of
2042 if (!code && OutStatus.FileType != Directory &&
2043 !tvc->f.parent.vnode) {
2044 tvc->f.parent.vnode = OutStatus.ParentVnode;
2045 tvc->f.parent.unique = OutStatus.ParentUnique;
2046 /* XXX - SXW - It's conceivable we should mark ourselves
2047 * as dirty again here, incase we've been raced
2048 * out of the FetchStatus call.
2055 ReleaseWriteLock(&tvc->lock);
2061 ReleaseWriteLock(&tvc->lock);
2064 } /*afs_GetVCache */
2069 * Lookup a vcache by fid. Look inside the cache first, if not
2070 * there, lookup the file on the server, and then get it's fresh
2075 * \param cached Is element cached? If NULL, don't answer.
2079 * \return The found element or NULL.
2082 afs_LookupVCache(struct VenusFid *afid, struct vrequest *areq,
2083 afs_int32 * cached, struct vcache *adp, char *aname)
2085 afs_int32 code, now, newvcache = 0;
2086 struct VenusFid nfid;
2087 register struct vcache *tvc;
2089 struct AFSFetchStatus OutStatus;
2090 struct AFSCallBack CallBack;
2091 struct AFSVolSync tsync;
2092 struct server *serverp = 0;
2096 AFS_STATCNT(afs_GetVCache);
2098 *cached = 0; /* Init just in case */
2100 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2104 ObtainReadLock(&afs_xvcache);
2105 tvc = afs_FindVCache(afid, &retry, DO_STATS /* no vlru */ );
2108 ReleaseReadLock(&afs_xvcache);
2110 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2111 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2115 ObtainReadLock(&tvc->lock);
2117 if (tvc->f.states & CStatd) {
2121 ReleaseReadLock(&tvc->lock);
2124 tvc->f.states &= ~CUnique;
2126 ReleaseReadLock(&tvc->lock);
2128 ObtainReadLock(&afs_xvcache);
2131 ReleaseReadLock(&afs_xvcache);
2133 /* lookup the file */
2136 origCBs = afs_allCBs; /* if anything changes, we don't have a cb */
2138 if (AFS_IS_DISCONNECTED) {
2139 printf("Network is down in afs_LookupVcache\n");
2143 afs_RemoteLookup(&adp->f.fid, areq, aname, &nfid, &OutStatus,
2144 &CallBack, &serverp, &tsync);
2146 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2150 ObtainSharedLock(&afs_xvcache, 6);
2151 tvc = afs_FindVCache(&nfid, &retry, DO_VLRU | IS_SLOCK/* no xstats now */ );
2153 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2154 ReleaseSharedLock(&afs_xvcache);
2155 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2161 /* no cache entry, better grab one */
2162 UpgradeSToWLock(&afs_xvcache, 22);
2163 tvc = afs_NewVCache(&nfid, serverp);
2165 ConvertWToSLock(&afs_xvcache);
2168 ReleaseSharedLock(&afs_xvcache);
2173 ReleaseSharedLock(&afs_xvcache);
2174 ObtainWriteLock(&tvc->lock, 55);
2176 /* It is always appropriate to throw away all the access rights? */
2177 afs_FreeAllAxs(&(tvc->Access));
2178 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-vol info */
2180 if ((tvp->states & VForeign)) {
2182 tvc->f.states |= CForeign;
2183 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
2184 && (tvp->rootUnique == afid->Fid.Unique))
2187 if (tvp->states & VRO)
2188 tvc->f.states |= CRO;
2189 if (tvp->states & VBackup)
2190 tvc->f.states |= CBackup;
2191 /* now copy ".." entry back out of volume structure, if necessary */
2192 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
2194 tvc->mvid = (struct VenusFid *)
2195 osi_AllocSmallSpace(sizeof(struct VenusFid));
2196 *tvc->mvid = tvp->dotdot;
2201 ObtainWriteLock(&afs_xcbhash, 465);
2202 afs_DequeueCallback(tvc);
2203 tvc->f.states &= ~(CStatd | CUnique);
2204 ReleaseWriteLock(&afs_xcbhash);
2205 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2206 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2208 afs_PutVolume(tvp, READ_LOCK);
2209 ReleaseWriteLock(&tvc->lock);
2214 ObtainWriteLock(&afs_xcbhash, 466);
2215 if (origCBs == afs_allCBs) {
2216 if (CallBack.ExpirationTime) {
2217 tvc->callback = serverp;
2218 tvc->cbExpires = CallBack.ExpirationTime + now;
2219 tvc->f.states |= CStatd | CUnique;
2220 tvc->f.states &= ~CBulkFetching;
2221 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvp);
2222 } else if (tvc->f.states & CRO) {
2223 /* adapt gives us an hour. */
2224 tvc->cbExpires = 3600 + osi_Time();
2225 /*XXX*/ tvc->f.states |= CStatd | CUnique;
2226 tvc->f.states &= ~CBulkFetching;
2227 afs_QueueCallback(tvc, CBHash(3600), tvp);
2229 tvc->callback = NULL;
2230 afs_DequeueCallback(tvc);
2231 tvc->f.states &= ~(CStatd | CUnique);
2232 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2233 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2236 afs_DequeueCallback(tvc);
2237 tvc->f.states &= ~CStatd;
2238 tvc->f.states &= ~CUnique;
2239 tvc->callback = NULL;
2240 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2241 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2243 ReleaseWriteLock(&afs_xcbhash);
2245 afs_PutVolume(tvp, READ_LOCK);
2246 afs_ProcessFS(tvc, &OutStatus, areq);
2248 ReleaseWriteLock(&tvc->lock);
2254 afs_GetRootVCache(struct VenusFid *afid, struct vrequest *areq,
2255 afs_int32 * cached, struct volume *tvolp)
2257 afs_int32 code = 0, i, newvcache = 0, haveStatus = 0;
2258 afs_int32 getNewFid = 0;
2260 struct VenusFid nfid;
2261 register struct vcache *tvc;
2262 struct server *serverp = 0;
2263 struct AFSFetchStatus OutStatus;
2264 struct AFSCallBack CallBack;
2265 struct AFSVolSync tsync;
2267 #ifdef AFS_DARWIN80_ENV
2274 if (!tvolp->rootVnode || getNewFid) {
2275 struct VenusFid tfid;
2278 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
2279 origCBs = afs_allCBs; /* ignore InitCallBackState */
2281 afs_RemoteLookup(&tfid, areq, NULL, &nfid, &OutStatus, &CallBack,
2286 /* ReleaseReadLock(&tvolp->lock); */
2287 ObtainWriteLock(&tvolp->lock, 56);
2288 tvolp->rootVnode = afid->Fid.Vnode = nfid.Fid.Vnode;
2289 tvolp->rootUnique = afid->Fid.Unique = nfid.Fid.Unique;
2290 ReleaseWriteLock(&tvolp->lock);
2291 /* ObtainReadLock(&tvolp->lock);*/
2294 afid->Fid.Vnode = tvolp->rootVnode;
2295 afid->Fid.Unique = tvolp->rootUnique;
2299 ObtainSharedLock(&afs_xvcache, 7);
2301 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2302 if (!FidCmp(&(tvc->f.fid), afid)) {
2303 if (tvc->f.states & CVInit) {
2304 ReleaseSharedLock(&afs_xvcache);
2305 afs_osi_Sleep(&tvc->f.states);
2308 #ifdef AFS_DARWIN80_ENV
2309 if (tvc->f.states & CDeadVnode) {
2310 ReleaseSharedLock(&afs_xvcache);
2311 afs_osi_Sleep(&tvc->f.states);
2315 if (vnode_get(tvp)) /* this bumps ref count */
2317 if (vnode_ref(tvp)) {
2319 /* AFSTOV(tvc) may be NULL */
2329 if (!haveStatus && (!tvc || !(tvc->f.states & CStatd))) {
2330 /* Mount point no longer stat'd or unknown. FID may have changed. */
2332 ReleaseSharedLock(&afs_xvcache);
2333 #ifdef AFS_DARWIN80_ENV
2336 vnode_put(AFSTOV(tvc));
2337 vnode_rele(AFSTOV(tvc));
2346 UpgradeSToWLock(&afs_xvcache, 23);
2347 /* no cache entry, better grab one */
2348 tvc = afs_NewVCache(afid, NULL);
2351 ReleaseWriteLock(&afs_xvcache);
2355 afs_stats_cmperf.vcacheMisses++;
2359 afs_stats_cmperf.vcacheHits++;
2360 #if defined(AFS_DARWIN80_ENV)
2361 /* we already bumped the ref count in the for loop above */
2362 #else /* AFS_DARWIN80_ENV */
2365 UpgradeSToWLock(&afs_xvcache, 24);
2366 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2367 refpanic("GRVC VLRU inconsistent0");
2369 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2370 refpanic("GRVC VLRU inconsistent1");
2372 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2373 refpanic("GRVC VLRU inconsistent2");
2375 QRemove(&tvc->vlruq); /* move to lruq head */
2376 QAdd(&VLRU, &tvc->vlruq);
2377 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2378 refpanic("GRVC VLRU inconsistent3");
2380 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2381 refpanic("GRVC VLRU inconsistent4");
2383 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2384 refpanic("GRVC VLRU inconsistent5");
2389 ReleaseWriteLock(&afs_xvcache);
2391 if (tvc->f.states & CStatd) {
2395 ObtainReadLock(&tvc->lock);
2396 tvc->f.states &= ~CUnique;
2397 tvc->callback = NULL; /* redundant, perhaps */
2398 ReleaseReadLock(&tvc->lock);
2401 ObtainWriteLock(&tvc->lock, 57);
2403 /* It is always appropriate to throw away all the access rights? */
2404 afs_FreeAllAxs(&(tvc->Access));
2407 tvc->f.states |= CForeign;
2408 if (tvolp->states & VRO)
2409 tvc->f.states |= CRO;
2410 if (tvolp->states & VBackup)
2411 tvc->f.states |= CBackup;
2412 /* now copy ".." entry back out of volume structure, if necessary */
2413 if (newvcache && (tvolp->rootVnode == afid->Fid.Vnode)
2414 && (tvolp->rootUnique == afid->Fid.Unique)) {
2417 if (tvc->mvstat == 2 && tvolp->dotdot.Fid.Volume != 0) {
2419 tvc->mvid = (struct VenusFid *)
2420 osi_AllocSmallSpace(sizeof(struct VenusFid));
2421 *tvc->mvid = tvolp->dotdot;
2425 afs_RemoveVCB(afid);
2428 struct VenusFid tfid;
2431 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
2432 origCBs = afs_allCBs; /* ignore InitCallBackState */
2434 afs_RemoteLookup(&tfid, areq, NULL, &nfid, &OutStatus, &CallBack,
2439 ObtainWriteLock(&afs_xcbhash, 467);
2440 afs_DequeueCallback(tvc);
2441 tvc->callback = NULL;
2442 tvc->f.states &= ~(CStatd | CUnique);
2443 ReleaseWriteLock(&afs_xcbhash);
2444 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2445 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2446 ReleaseWriteLock(&tvc->lock);
2451 ObtainWriteLock(&afs_xcbhash, 468);
2452 if (origCBs == afs_allCBs) {
2453 tvc->f.states |= CTruth;
2454 tvc->callback = serverp;
2455 if (CallBack.ExpirationTime != 0) {
2456 tvc->cbExpires = CallBack.ExpirationTime + start;
2457 tvc->f.states |= CStatd;
2458 tvc->f.states &= ~CBulkFetching;
2459 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvolp);
2460 } else if (tvc->f.states & CRO) {
2461 /* adapt gives us an hour. */
2462 tvc->cbExpires = 3600 + osi_Time();
2463 /*XXX*/ tvc->f.states |= CStatd;
2464 tvc->f.states &= ~CBulkFetching;
2465 afs_QueueCallback(tvc, CBHash(3600), tvolp);
2468 afs_DequeueCallback(tvc);
2469 tvc->callback = NULL;
2470 tvc->f.states &= ~(CStatd | CUnique);
2471 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2472 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2474 ReleaseWriteLock(&afs_xcbhash);
2475 afs_ProcessFS(tvc, &OutStatus, areq);
2477 ReleaseWriteLock(&tvc->lock);
2483 * Update callback status and (sometimes) attributes of a vnode.
2484 * Called after doing a fetch status RPC. Whilst disconnected, attributes
2485 * shouldn't be written to the vcache here.
2490 * \param Outsp Server status after rpc call.
2491 * \param acb Callback for this vnode.
2493 * \note The vcache must be write locked.
2496 afs_UpdateStatus(struct vcache *avc,
2497 struct VenusFid *afid,
2498 struct vrequest *areq,
2499 struct AFSFetchStatus *Outsp,
2500 struct AFSCallBack *acb,
2503 struct volume *volp;
2506 /* Dont write status in vcache if resyncing after a disconnection. */
2507 afs_ProcessFS(avc, Outsp, areq);
2509 volp = afs_GetVolume(afid, areq, READ_LOCK);
2510 ObtainWriteLock(&afs_xcbhash, 469);
2511 avc->f.states |= CTruth;
2512 if (avc->callback /* check for race */ ) {
2513 if (acb->ExpirationTime != 0) {
2514 avc->cbExpires = acb->ExpirationTime + start;
2515 avc->f.states |= CStatd;
2516 avc->f.states &= ~CBulkFetching;
2517 afs_QueueCallback(avc, CBHash(acb->ExpirationTime), volp);
2518 } else if (avc->f.states & CRO) {
2519 /* ordinary callback on a read-only volume -- AFS 3.2 style */
2520 avc->cbExpires = 3600 + start;
2521 avc->f.states |= CStatd;
2522 avc->f.states &= ~CBulkFetching;
2523 afs_QueueCallback(avc, CBHash(3600), volp);
2525 afs_DequeueCallback(avc);
2526 avc->callback = NULL;
2527 avc->f.states &= ~(CStatd | CUnique);
2528 if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
2529 osi_dnlc_purgedp(avc); /* if it (could be) a directory */
2532 afs_DequeueCallback(avc);
2533 avc->callback = NULL;
2534 avc->f.states &= ~(CStatd | CUnique);
2535 if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
2536 osi_dnlc_purgedp(avc); /* if it (could be) a directory */
2538 ReleaseWriteLock(&afs_xcbhash);
2540 afs_PutVolume(volp, READ_LOCK);
2544 * Must be called with avc write-locked
2545 * don't absolutely have to invalidate the hint unless the dv has
2546 * changed, but be sure to get it right else there will be consistency bugs.
2549 afs_FetchStatus(struct vcache * avc, struct VenusFid * afid,
2550 struct vrequest * areq, struct AFSFetchStatus * Outsp)
2553 afs_uint32 start = 0;
2554 register struct afs_conn *tc;
2555 struct AFSCallBack CallBack;
2556 struct AFSVolSync tsync;
2559 tc = afs_Conn(afid, areq, SHARED_LOCK);
2560 avc->dchint = NULL; /* invalidate hints */
2562 avc->callback = tc->srvr->server;
2564 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_FETCHSTATUS);
2567 RXAFS_FetchStatus(tc->id, (struct AFSFid *)&afid->Fid, Outsp,
2575 } while (afs_Analyze
2576 (tc, code, afid, areq, AFS_STATS_FS_RPCIDX_FETCHSTATUS,
2577 SHARED_LOCK, NULL));
2580 afs_UpdateStatus(avc, afid, areq, Outsp, &CallBack, start);
2582 /* used to undo the local callback, but that's too extreme.
2583 * There are plenty of good reasons that fetchstatus might return
2584 * an error, such as EPERM. If we have the vnode cached, statd,
2585 * with callback, might as well keep track of the fact that we
2586 * don't have access...
2588 if (code == EPERM || code == EACCES) {
2589 struct axscache *ac;
2590 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
2592 else /* not found, add a new one if possible */
2593 afs_AddAxs(avc->Access, areq->uid, 0);
2604 * Stuff some information into the vcache for the given file.
2607 * afid : File in question.
2608 * OutStatus : Fetch status on the file.
2609 * CallBack : Callback info.
2610 * tc : RPC connection involved.
2611 * areq : vrequest involved.
2614 * Nothing interesting.
2617 afs_StuffVcache(register struct VenusFid *afid,
2618 struct AFSFetchStatus *OutStatus,
2619 struct AFSCallBack *CallBack, register struct afs_conn *tc,
2620 struct vrequest *areq)
2622 register afs_int32 code, i, newvcache = 0;
2623 register struct vcache *tvc;
2624 struct AFSVolSync tsync;
2626 struct axscache *ac;
2629 AFS_STATCNT(afs_StuffVcache);
2630 #ifdef IFS_VCACHECOUNT
2635 ObtainSharedLock(&afs_xvcache, 8);
2637 tvc = afs_FindVCache(afid, &retry, DO_VLRU| IS_SLOCK /* no stats */ );
2639 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2640 ReleaseSharedLock(&afs_xvcache);
2641 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2647 /* no cache entry, better grab one */
2648 UpgradeSToWLock(&afs_xvcache, 25);
2649 tvc = afs_NewVCache(afid, NULL);
2651 ConvertWToSLock(&afs_xvcache);
2654 ReleaseSharedLock(&afs_xvcache);
2659 ReleaseSharedLock(&afs_xvcache);
2660 ObtainWriteLock(&tvc->lock, 58);
2662 tvc->f.states &= ~CStatd;
2663 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2664 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2666 /* Is it always appropriate to throw away all the access rights? */
2667 afs_FreeAllAxs(&(tvc->Access));
2669 /*Copy useful per-volume info */
2670 tvp = afs_GetVolume(afid, areq, READ_LOCK);
2672 if (newvcache && (tvp->states & VForeign))
2673 tvc->f.states |= CForeign;
2674 if (tvp->states & VRO)
2675 tvc->f.states |= CRO;
2676 if (tvp->states & VBackup)
2677 tvc->f.states |= CBackup;
2679 * Now, copy ".." entry back out of volume structure, if
2682 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
2684 tvc->mvid = (struct VenusFid *)
2685 osi_AllocSmallSpace(sizeof(struct VenusFid));
2686 *tvc->mvid = tvp->dotdot;
2689 /* store the stat on the file */
2690 afs_RemoveVCB(afid);
2691 afs_ProcessFS(tvc, OutStatus, areq);
2692 tvc->callback = tc->srvr->server;
2694 /* we use osi_Time twice below. Ideally, we would use the time at which
2695 * the FetchStatus call began, instead, but we don't have it here. So we
2696 * make do with "now". In the CRO case, it doesn't really matter. In
2697 * the other case, we hope that the difference between "now" and when the
2698 * call actually began execution on the server won't be larger than the
2699 * padding which the server keeps. Subtract 1 second anyway, to be on
2700 * the safe side. Can't subtract more because we don't know how big
2701 * ExpirationTime is. Possible consistency problems may arise if the call
2702 * timeout period becomes longer than the server's expiration padding. */
2703 ObtainWriteLock(&afs_xcbhash, 470);
2704 if (CallBack->ExpirationTime != 0) {
2705 tvc->cbExpires = CallBack->ExpirationTime + osi_Time() - 1;
2706 tvc->f.states |= CStatd;
2707 tvc->f.states &= ~CBulkFetching;
2708 afs_QueueCallback(tvc, CBHash(CallBack->ExpirationTime), tvp);
2709 } else if (tvc->f.states & CRO) {
2710 /* old-fashioned AFS 3.2 style */
2711 tvc->cbExpires = 3600 + osi_Time();
2712 /*XXX*/ tvc->f.states |= CStatd;
2713 tvc->f.states &= ~CBulkFetching;
2714 afs_QueueCallback(tvc, CBHash(3600), tvp);
2716 afs_DequeueCallback(tvc);
2717 tvc->callback = NULL;
2718 tvc->f.states &= ~(CStatd | CUnique);
2719 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2720 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2722 ReleaseWriteLock(&afs_xcbhash);
2724 afs_PutVolume(tvp, READ_LOCK);
2726 /* look in per-pag cache */
2727 if (tvc->Access && (ac = afs_FindAxs(tvc->Access, areq->uid)))
2728 ac->axess = OutStatus->CallerAccess; /* substitute pags */
2729 else /* not found, add a new one if possible */
2730 afs_AddAxs(tvc->Access, areq->uid, OutStatus->CallerAccess);
2732 ReleaseWriteLock(&tvc->lock);
2733 afs_Trace4(afs_iclSetp, CM_TRACE_STUFFVCACHE, ICL_TYPE_POINTER, tvc,
2734 ICL_TYPE_POINTER, tvc->callback, ICL_TYPE_INT32,
2735 tvc->cbExpires, ICL_TYPE_INT32, tvc->cbExpires - osi_Time());
2737 * Release ref count... hope this guy stays around...
2740 } /*afs_StuffVcache */
2744 * Decrements the reference count on a cache entry.
2746 * \param avc Pointer to the cache entry to decrement.
2748 * \note Environment: Nothing interesting.
2751 afs_PutVCache(register struct vcache *avc)
2753 AFS_STATCNT(afs_PutVCache);
2754 #ifdef AFS_DARWIN80_ENV
2755 vnode_put(AFSTOV(avc));
2759 * Can we use a read lock here?
2761 ObtainReadLock(&afs_xvcache);
2763 ReleaseReadLock(&afs_xvcache);
2765 } /*afs_PutVCache */
2769 * Reset a vcache entry, so local contents are ignored, and the
2770 * server will be reconsulted next time the vcache is used
2772 * \param avc Pointer to the cache entry to reset
2775 * \note avc must be write locked on entry
2778 afs_ResetVCache(struct vcache *avc, afs_ucred_t *acred) {
2779 ObtainWriteLock(&afs_xcbhash, 456);
2780 afs_DequeueCallback(avc);
2781 avc->f.states &= ~(CStatd | CDirty); /* next reference will re-stat */
2782 ReleaseWriteLock(&afs_xcbhash);
2783 /* now find the disk cache entries */
2784 afs_TryToSmush(avc, acred, 1);
2785 osi_dnlc_purgedp(avc);
2786 if (avc->linkData && !(avc->f.states & CCore)) {
2787 afs_osi_Free(avc->linkData, strlen(avc->linkData) + 1);
2788 avc->linkData = NULL;
2793 * Sleepa when searching for a vcache. Releases all the pending locks,
2794 * sleeps then obtains the previously released locks.
2796 * \param vcache Enter sleep state.
2797 * \param flag Determines what locks to use.
2801 static void findvc_sleep(struct vcache *avc, int flag) {
2802 if (flag & IS_SLOCK) {
2803 ReleaseSharedLock(&afs_xvcache);
2805 if (flag & IS_WLOCK) {
2806 ReleaseWriteLock(&afs_xvcache);
2808 ReleaseReadLock(&afs_xvcache);
2811 afs_osi_Sleep(&avc->f.states);
2812 if (flag & IS_SLOCK) {
2813 ObtainSharedLock(&afs_xvcache, 341);
2815 if (flag & IS_WLOCK) {
2816 ObtainWriteLock(&afs_xvcache, 343);
2818 ObtainReadLock(&afs_xvcache);
2823 * Find a vcache entry given a fid.
2825 * \param afid Pointer to the fid whose cache entry we desire.
2826 * \param retry (SGI-specific) tell the caller to drop the lock on xvcache,
2827 * unlock the vnode, and try again.
2828 * \param flag Bit 1 to specify whether to compute hit statistics. Not
2829 * set if FindVCache is called as part of internal bookkeeping.
2831 * \note Environment: Must be called with the afs_xvcache lock at least held at
2832 * the read level. In order to do the VLRU adjustment, the xvcache lock
2833 * must be shared-- we upgrade it here.
2837 afs_FindVCache(struct VenusFid *afid, afs_int32 * retry, afs_int32 flag)
2840 register struct vcache *tvc;
2842 #ifdef AFS_DARWIN80_ENV
2846 AFS_STATCNT(afs_FindVCache);
2850 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2851 if (FidMatches(afid, tvc)) {
2852 if (tvc->f.states & CVInit) {
2853 findvc_sleep(tvc, flag);
2856 #ifdef AFS_DARWIN80_ENV
2857 if (tvc->f.states & CDeadVnode) {
2858 findvc_sleep(tvc, flag);
2864 if (vnode_ref(tvp)) {
2866 /* AFSTOV(tvc) may be NULL */
2876 /* should I have a read lock on the vnode here? */
2880 #if !defined(AFS_DARWIN80_ENV)
2881 osi_vnhold(tvc, retry); /* already held, above */
2882 if (retry && *retry)
2885 #if defined(AFS_DARWIN_ENV) && !defined(AFS_DARWIN80_ENV)
2886 tvc->f.states |= CUBCinit;
2888 if (UBCINFOMISSING(AFSTOV(tvc)) ||
2889 UBCINFORECLAIMED(AFSTOV(tvc))) {
2890 ubc_info_init(AFSTOV(tvc));
2893 tvc->f.states &= ~CUBCinit;
2896 * only move to front of vlru if we have proper vcache locking)
2898 if (flag & DO_VLRU) {
2899 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2900 refpanic("FindVC VLRU inconsistent1");
2902 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2903 refpanic("FindVC VLRU inconsistent1");
2905 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2906 refpanic("FindVC VLRU inconsistent2");
2908 UpgradeSToWLock(&afs_xvcache, 26);
2909 QRemove(&tvc->vlruq);
2910 QAdd(&VLRU, &tvc->vlruq);
2911 ConvertWToSLock(&afs_xvcache);
2912 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2913 refpanic("FindVC VLRU inconsistent1");
2915 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2916 refpanic("FindVC VLRU inconsistent2");
2918 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2919 refpanic("FindVC VLRU inconsistent3");
2925 if (flag & DO_STATS) {
2927 afs_stats_cmperf.vcacheHits++;
2929 afs_stats_cmperf.vcacheMisses++;
2930 if (afs_IsPrimaryCellNum(afid->Cell))
2931 afs_stats_cmperf.vlocalAccesses++;
2933 afs_stats_cmperf.vremoteAccesses++;
2936 } /*afs_FindVCache */
2939 * Find a vcache entry given a fid. Does a wildcard match on what we
2940 * have for the fid. If more than one entry, don't return anything.
2942 * \param avcp Fill in pointer if we found one and only one.
2943 * \param afid Pointer to the fid whose cache entry we desire.
2944 * \param retry (SGI-specific) tell the caller to drop the lock on xvcache,
2945 * unlock the vnode, and try again.
2946 * \param flags bit 1 to specify whether to compute hit statistics. Not
2947 * set if FindVCache is called as part of internal bookkeeping.
2949 * \note Environment: Must be called with the afs_xvcache lock at least held at
2950 * the read level. In order to do the VLRU adjustment, the xvcache lock
2951 * must be shared-- we upgrade it here.
2953 * \return Number of matches found.
2956 int afs_duplicate_nfs_fids = 0;
2959 afs_NFSFindVCache(struct vcache **avcp, struct VenusFid *afid)
2961 register struct vcache *tvc;
2963 afs_int32 count = 0;
2964 struct vcache *found_tvc = NULL;
2965 #ifdef AFS_DARWIN80_ENV
2969 AFS_STATCNT(afs_FindVCache);
2973 ObtainSharedLock(&afs_xvcache, 331);
2976 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2977 /* Match only on what we have.... */
2978 if (((tvc->f.fid.Fid.Vnode & 0xffff) == afid->Fid.Vnode)
2979 && (tvc->f.fid.Fid.Volume == afid->Fid.Volume)
2980 && ((tvc->f.fid.Fid.Unique & 0xffffff) == afid->Fid.Unique)
2981 && (tvc->f.fid.Cell == afid->Cell)) {
2982 if (tvc->f.states & CVInit) {
2983 ReleaseSharedLock(&afs_xvcache);
2984 afs_osi_Sleep(&tvc->f.states);
2987 #ifdef AFS_DARWIN80_ENV
2988 if (tvc->f.states & CDeadVnode) {
2989 ReleaseSharedLock(&afs_xvcache);
2990 afs_osi_Sleep(&tvc->f.states);
2994 if (vnode_get(tvp)) {
2995 /* This vnode no longer exists. */
2998 if (vnode_ref(tvp)) {
2999 /* This vnode no longer exists. */
3001 /* AFSTOV(tvc) may be NULL */
3006 #endif /* AFS_DARWIN80_ENV */
3010 afs_duplicate_nfs_fids++;
3011 ReleaseSharedLock(&afs_xvcache);
3012 #ifdef AFS_DARWIN80_ENV
3013 /* Drop our reference counts. */
3014 vnode_put(AFSTOV(tvc));
3015 vnode_put(AFSTOV(found_tvc));
3024 /* should I have a read lock on the vnode here? */
3026 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
3027 afs_int32 retry = 0;
3028 osi_vnhold(tvc, &retry);
3031 found_tvc = (struct vcache *)0;
3032 ReleaseSharedLock(&afs_xvcache);
3033 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
3037 osi_vnhold(tvc, (int *)0); /* already held, above */
3040 * We obtained the xvcache lock above.
3042 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
3043 refpanic("FindVC VLRU inconsistent1");
3045 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
3046 refpanic("FindVC VLRU inconsistent1");
3048 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
3049 refpanic("FindVC VLRU inconsistent2");
3051 UpgradeSToWLock(&afs_xvcache, 568);
3052 QRemove(&tvc->vlruq);
3053 QAdd(&VLRU, &tvc->vlruq);
3054 ConvertWToSLock(&afs_xvcache);
3055 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
3056 refpanic("FindVC VLRU inconsistent1");
3058 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
3059 refpanic("FindVC VLRU inconsistent2");
3061 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
3062 refpanic("FindVC VLRU inconsistent3");
3068 afs_stats_cmperf.vcacheHits++;
3070 afs_stats_cmperf.vcacheMisses++;
3071 if (afs_IsPrimaryCellNum(afid->Cell))
3072 afs_stats_cmperf.vlocalAccesses++;
3074 afs_stats_cmperf.vremoteAccesses++;
3076 *avcp = tvc; /* May be null */
3078 ReleaseSharedLock(&afs_xvcache);
3079 return (tvc ? 1 : 0);
3081 } /*afs_NFSFindVCache */
3087 * Initialize vcache related variables
3092 afs_vcacheInit(int astatSize)
3094 #if !defined(AFS_LINUX22_ENV)
3095 register struct vcache *tvp;
3098 #if defined(AFS_LINUX22_ENV)
3099 if (!afs_maxvcount) {
3100 afs_maxvcount = astatSize; /* no particular limit on linux? */
3101 if (astatSize < afs_maxvcount) {
3102 afs_maxvcount = astatSize;
3105 #else /* AFS_LINUX22_ENV */
3109 AFS_RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
3110 LOCK_INIT(&afs_xvcb, "afs_xvcb");
3112 #if !defined(AFS_LINUX22_ENV)
3113 /* Allocate and thread the struct vcache entries */
3114 tvp = (struct vcache *)afs_osi_Alloc(astatSize * sizeof(struct vcache));
3115 memset(tvp, 0, sizeof(struct vcache) * astatSize);
3117 Initial_freeVCList = tvp;
3118 freeVCList = &(tvp[0]);
3119 for (i = 0; i < astatSize - 1; i++) {
3120 tvp[i].nextfree = &(tvp[i + 1]);
3122 tvp[astatSize - 1].nextfree = NULL;
3123 # ifdef KERNEL_HAVE_PIN
3124 pin((char *)tvp, astatSize * sizeof(struct vcache)); /* XXX */
3128 #if defined(AFS_SGI_ENV)
3129 for (i = 0; i < astatSize; i++) {
3130 char name[METER_NAMSZ];
3131 struct vcache *tvc = &tvp[i];
3133 tvc->v.v_number = ++afsvnumbers;
3134 tvc->vc_rwlockid = OSI_NO_LOCKID;
3135 initnsema(&tvc->vc_rwlock, 1,
3136 makesname(name, "vrw", tvc->v.v_number));
3137 #ifndef AFS_SGI53_ENV
3138 initnsema(&tvc->v.v_sync, 0, makesname(name, "vsy", tvc->v.v_number));
3140 #ifndef AFS_SGI62_ENV
3141 initnlock(&tvc->v.v_lock, makesname(name, "vlk", tvc->v.v_number));
3142 #endif /* AFS_SGI62_ENV */
3146 for(i = 0; i < VCSIZE; ++i)
3147 QInit(&afs_vhashTV[i]);
3154 shutdown_vcache(void)
3157 struct afs_cbr *tsp;
3159 * XXX We may potentially miss some of the vcaches because if when
3160 * there are no free vcache entries and all the vcache entries are active
3161 * ones then we allocate an additional one - admittedly we almost never
3166 register struct afs_q *tq, *uq = NULL;
3167 register struct vcache *tvc;
3168 for (tq = VLRU.prev; tq != &VLRU; tq = uq) {
3172 osi_FreeSmallSpace(tvc->mvid);
3173 tvc->mvid = (struct VenusFid *)0;
3176 aix_gnode_rele(AFSTOV(tvc));
3178 if (tvc->linkData) {
3179 afs_osi_Free(tvc->linkData, strlen(tvc->linkData) + 1);
3184 * Also free the remaining ones in the Cache
3186 for (i = 0; i < VCSIZE; i++) {
3187 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
3189 osi_FreeSmallSpace(tvc->mvid);
3190 tvc->mvid = (struct VenusFid *)0;
3194 afs_osi_Free(tvc->v.v_gnode, sizeof(struct gnode));
3195 #ifdef AFS_AIX32_ENV
3198 vms_delete(tvc->segid);
3200 tvc->segid = tvc->vmh = NULL;
3201 if (VREFCOUNT_GT(tvc,0))
3202 osi_Panic("flushVcache: vm race");
3210 #if defined(AFS_SUN5_ENV)
3216 if (tvc->linkData) {
3217 afs_osi_Free(tvc->linkData, strlen(tvc->linkData) + 1);
3222 afs_FreeAllAxs(&(tvc->Access));
3228 * Free any leftover callback queue
3230 for (i = 0; i < afs_stats_cmperf.CallBackAlloced; i++) {
3231 tsp = afs_cbrHeads[i];
3232 afs_cbrHeads[i] = 0;
3233 afs_osi_Free((char *)tsp, AFS_NCBRS * sizeof(struct afs_cbr));
3237 #if !defined(AFS_LINUX22_ENV)
3238 afs_osi_Free(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
3240 # ifdef KERNEL_HAVE_PIN
3241 unpin(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
3244 freeVCList = Initial_freeVCList = 0;
3247 AFS_RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
3248 LOCK_INIT(&afs_xvcb, "afs_xvcb");
3250 for(i = 0; i < VCSIZE; ++i)
3251 QInit(&afs_vhashTV[i]);
3255 afs_DisconGiveUpCallbacks(void) {
3260 ObtainWriteLock(&afs_xvcache, 1002); /* XXX - should be a unique number */
3262 /* Somehow, walk the set of vcaches, with each one coming out as tvc */
3263 for (i = 0; i < VCSIZE; i++) {
3264 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
3265 if (afs_QueueVCB(tvc)) {
3266 tvc->callback = NULL;
3272 ReleaseWriteLock(&afs_xvcache);
3279 * Clear the Statd flag from all vcaches
3281 * This function removes the Statd flag from all vcaches. It's used by
3282 * disconnected mode to tidy up during reconnection
3286 afs_ClearAllStatdFlag(void) {
3290 ObtainWriteLock(&afs_xvcache, 715);
3292 for (i = 0; i < VCSIZE; i++) {
3293 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
3294 tvc->f.states &= ~(CStatd|CUnique);
3297 ReleaseWriteLock(&afs_xvcache);