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(AFS_XBSD_ENV)) && !defined(UKERNEL)
746 tvc->v = NULL; /* important to clean this, or use memset 0 */
747 #endif /* DARWIN || XBSD && !UKERNEL */
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.
892 #if defined(AFS_FBSD80_ENV)
893 /* vgone() is correct, but v_usecount is assumed not
894 * to be 0, and I suspect that currently our usage ensures that
896 if (vrefcnt(AFSTOV(tvc)) < 1) {
899 vn_lock(AFSTOV(tvc), LK_EXCLUSIVE | LK_RETRY); /* !glocked */
902 #if defined(AFS_FBSD80_ENV)
903 VOP_UNLOCK(AFSTOV(tvc), 0);
909 #else /* AFS_DARWIN80_ENV || AFS_XBSD_ENV */
910 code = afs_FlushVCache(tvc, &fv_slept);
911 #endif /* AFS_DARWIN80_ENV || AFS_XBSD_ENV */
920 continue; /* start over - may have raced. */
926 } /* end of if (!freeVCList) */
929 tvc = afs_AllocVCache();
931 tvc = freeVCList; /* take from free list */
932 freeVCList = tvc->nextfree;
933 tvc->nextfree = NULL;
934 } /* end of if (!freeVCList) */
936 #endif /* AFS_LINUX22_ENV */
938 #if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV)
940 panic("afs_NewVCache(): free vcache with vnode attached");
943 #if !defined(AFS_SGI_ENV) && !defined(AFS_LINUX22_ENV)
945 #if defined(AFS_DISCON_ENV)
946 /* We need to preserve the slot that we're being stored into on
950 slot = tvc->diskSlot;
951 memset(tvc, 0, sizeof(struct vcache));
952 tvc->diskSlot = slot;
955 memset(tvc, 0, sizeof(struct vcache));
960 memset(&(tvc->f), 0, sizeof(struct fvcache));
963 AFS_RWLOCK_INIT(&tvc->lock, "vcache lock");
964 #if defined(AFS_SUN5_ENV)
965 AFS_RWLOCK_INIT(&tvc->vlock, "vcache vlock");
966 #endif /* defined(AFS_SUN5_ENV) */
969 tvc->linkData = NULL;
972 tvc->execsOrWriters = 0;
974 tvc->f.states = CVInit;
975 tvc->last_looker = 0;
977 tvc->asynchrony = -1;
979 #if defined(AFS_LINUX26_ENV)
983 tvc->flushDV.low = tvc->flushDV.high = AFS_MAXDV;
986 tvc->f.truncPos = AFS_NOTRUNC; /* don't truncate until we need to */
987 hzero(tvc->f.m.DataVersion); /* in case we copy it into flushDV */
989 tvc->callback = serverp; /* to minimize chance that clear
991 #if defined(AFS_DISCON_ENV)
992 QZero(&tvc->metadirty);
998 tvc->hnext = afs_vhashT[i];
1000 QAdd(&afs_vhashTV[j], &tvc->vhashq);
1002 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
1003 refpanic("NewVCache VLRU inconsistent");
1005 QAdd(&VLRU, &tvc->vlruq); /* put in lruq */
1006 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
1007 refpanic("NewVCache VLRU inconsistent2");
1009 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
1010 refpanic("NewVCache VLRU inconsistent3");
1012 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
1013 refpanic("NewVCache VLRU inconsistent4");
1016 /* it should now be safe to drop the xvcache lock */
1018 ReleaseWriteLock(&afs_xvcache);
1020 afs_nbsd_getnewvnode(tvc); /* includes one refcount */
1022 ObtainWriteLock(&afs_xvcache,337);
1023 lockinit(&tvc->rwlock, PINOD, "vcache", 0, 0);
1025 #ifdef AFS_DARWIN_ENV
1026 ReleaseWriteLock(&afs_xvcache);
1028 afs_darwin_getnewvnode(tvc); /* includes one refcount */
1030 ObtainWriteLock(&afs_xvcache,338);
1031 #ifdef AFS_DARWIN80_ENV
1032 LOCKINIT(tvc->rwlock);
1034 lockinit(&tvc->rwlock, PINOD, "vcache", 0, 0);
1041 ReleaseWriteLock(&afs_xvcache);
1043 #if defined(AFS_FBSD60_ENV)
1044 if (getnewvnode(MOUNT_AFS, afs_globalVFS, &afs_vnodeops, &vp))
1045 #elif defined(AFS_FBSD50_ENV)
1046 if (getnewvnode(MOUNT_AFS, afs_globalVFS, afs_vnodeop_p, &vp))
1048 if (getnewvnode(VT_AFS, afs_globalVFS, afs_vnodeop_p, &vp))
1050 panic("afs getnewvnode"); /* can't happen */
1051 #ifdef AFS_FBSD70_ENV
1052 /* XXX verified on 80--TODO check on 7x */
1054 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); /* !glocked */
1055 insmntque(vp, afs_globalVFS);
1060 ObtainWriteLock(&afs_xvcache,339);
1061 if (tvc->v != NULL) {
1062 /* I'd like to know if this ever happens...
1063 * We don't drop global for the rest of this function,
1064 * so if we do lose the race, the other thread should
1065 * have found the same vnode and finished initializing
1066 * the vcache entry. Is it conceivable that this vcache
1067 * entry could be recycled during this interval? If so,
1068 * then there probably needs to be some sort of additional
1069 * mutual exclusion (an Embryonic flag would suffice).
1071 printf("afs_NewVCache: lost the race\n");
1075 tvc->v->v_data = tvc;
1076 lockinit(&tvc->rwlock, PINOD, "vcache", 0, 0);
1080 #if defined(AFS_LINUX22_ENV)
1081 /* Hold it for the LRU (should make count 2) */
1082 VN_HOLD(AFSTOV(tvc));
1083 #elif !(defined (AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV))
1084 VREFCOUNT_SET(tvc, 1); /* us */
1087 #ifdef AFS_AIX32_ENV
1088 LOCK_INIT(&tvc->pvmlock, "vcache pvmlock");
1089 tvc->vmh = tvc->segid = NULL;
1093 #if defined(AFS_CACHE_BYPASS)
1094 tvc->cachingStates = 0;
1095 tvc->cachingTransitions = 0;
1098 #ifdef AFS_BOZONLOCK_ENV
1099 #if defined(AFS_SUN5_ENV)
1100 rw_init(&tvc->rwlock, "vcache rwlock", RW_DEFAULT, NULL);
1102 #if defined(AFS_SUN55_ENV)
1103 /* This is required if the kaio (kernel aynchronous io)
1104 ** module is installed. Inside the kernel, the function
1105 ** check_vp( common/os/aio.c) checks to see if the kernel has
1106 ** to provide asynchronous io for this vnode. This
1107 ** function extracts the device number by following the
1108 ** v_data field of the vnode. If we do not set this field
1109 ** then the system panics. The value of the v_data field
1110 ** is not really important for AFS vnodes because the kernel
1111 ** does not do asynchronous io for regular files. Hence,
1112 ** for the time being, we fill up the v_data field with the
1113 ** vnode pointer itself. */
1114 tvc->v.v_data = (char *)tvc;
1115 #endif /* AFS_SUN55_ENV */
1117 afs_BozonInit(&tvc->pvnLock, tvc);
1120 /* initialize vnode data, note vrefCount is v.v_count */
1122 /* Don't forget to free the gnode space */
1123 tvc->v.v_gnode = gnodepnt =
1124 (struct gnode *)osi_AllocSmallSpace(sizeof(struct gnode));
1125 memset(gnodepnt, 0, sizeof(struct gnode));
1127 #ifdef AFS_SGI64_ENV
1128 memset((void *)&(tvc->vc_bhv_desc), 0, sizeof(tvc->vc_bhv_desc));
1129 bhv_desc_init(&(tvc->vc_bhv_desc), tvc, tvc, &Afs_vnodeops);
1130 #ifdef AFS_SGI65_ENV
1131 vn_bhv_head_init(&(tvc->v.v_bh), "afsvp");
1132 vn_bhv_insert_initial(&(tvc->v.v_bh), &(tvc->vc_bhv_desc));
1134 bhv_head_init(&(tvc->v.v_bh));
1135 bhv_insert_initial(&(tvc->v.v_bh), &(tvc->vc_bhv_desc));
1137 #ifdef AFS_SGI65_ENV
1138 tvc->v.v_mreg = tvc->v.v_mregb = (struct pregion *)tvc;
1139 #ifdef VNODE_TRACING
1140 tvc->v.v_trace = ktrace_alloc(VNODE_TRACE_SIZE, 0);
1142 init_bitlock(&tvc->v.v_pcacheflag, VNODE_PCACHE_LOCKBIT, "afs_pcache",
1144 init_mutex(&tvc->v.v_filocksem, MUTEX_DEFAULT, "afsvfl", (long)tvc);
1145 init_mutex(&tvc->v.v_buf_lock, MUTEX_DEFAULT, "afsvnbuf", (long)tvc);
1147 vnode_pcache_init(&tvc->v);
1148 #if defined(DEBUG) && defined(VNODE_INIT_BITLOCK)
1149 /* Above define is never true execpt in SGI test kernels. */
1150 init_bitlock(&(tvc->v.v_flag, VLOCK, "vnode", tvc->v.v_number);
1152 #ifdef INTR_KTHREADS
1153 AFS_VN_INIT_BUF_LOCK(&(tvc->v));
1156 SetAfsVnode(AFSTOV(tvc));
1157 #endif /* AFS_SGI64_ENV */
1159 * The proper value for mvstat (for root fids) is setup by the caller.
1162 if (afid->Fid.Vnode == 1 && afid->Fid.Unique == 1)
1164 if (afs_globalVFS == 0)
1165 osi_Panic("afs globalvfs");
1166 #if !defined(AFS_LINUX22_ENV)
1167 vSetVfsp(tvc, afs_globalVFS);
1169 vSetType(tvc, VREG);
1171 tvc->v.v_vfsnext = afs_globalVFS->vfs_vnodes; /* link off vfs */
1172 tvc->v.v_vfsprev = NULL;
1173 afs_globalVFS->vfs_vnodes = &tvc->v;
1174 if (tvc->v.v_vfsnext != NULL)
1175 tvc->v.v_vfsnext->v_vfsprev = &tvc->v;
1176 tvc->v.v_next = gnodepnt->gn_vnode; /*Single vnode per gnode for us! */
1177 gnodepnt->gn_vnode = &tvc->v;
1179 #if defined(AFS_SGI_ENV)
1180 VN_SET_DPAGES(&(tvc->v), (struct pfdat *)NULL);
1181 osi_Assert((tvc->v.v_flag & VINACT) == 0);
1183 osi_Assert(VN_GET_PGCNT(&(tvc->v)) == 0);
1184 osi_Assert(tvc->mapcnt == 0 && tvc->vc_locktrips == 0);
1185 osi_Assert(tvc->vc_rwlockid == OSI_NO_LOCKID);
1186 osi_Assert(tvc->v.v_filocks == NULL);
1187 #if !defined(AFS_SGI65_ENV)
1188 osi_Assert(tvc->v.v_filocksem == NULL);
1190 osi_Assert(tvc->cred == NULL);
1191 #ifdef AFS_SGI64_ENV
1192 vnode_pcache_reinit(&tvc->v);
1193 tvc->v.v_rdev = NODEV;
1195 vn_initlist((struct vnlist *)&tvc->v);
1197 #endif /* AFS_SGI_ENV */
1199 osi_dnlc_purgedp(tvc); /* this may be overkill */
1200 memset(&(tvc->callsort), 0, sizeof(struct afs_q));
1202 tvc->f.states &=~ CVInit;
1203 afs_osi_Wakeup(&tvc->f.states);
1207 } /*afs_NewVCache */
1213 * LOCK: afs_FlushActiveVcaches afs_xvcache N
1215 * \param doflocks : Do we handle flocks?
1218 afs_FlushActiveVcaches(register afs_int32 doflocks)
1220 register struct vcache *tvc;
1222 register struct afs_conn *tc;
1223 register afs_int32 code;
1224 afs_ucred_t *cred = NULL;
1225 struct vrequest treq, ureq;
1226 struct AFSVolSync tsync;
1229 AFS_STATCNT(afs_FlushActiveVcaches);
1230 ObtainReadLock(&afs_xvcache);
1231 for (i = 0; i < VCSIZE; i++) {
1232 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
1233 if (tvc->f.states & CVInit) continue;
1234 #ifdef AFS_DARWIN80_ENV
1235 if (tvc->f.states & CDeadVnode &&
1236 (tvc->f.states & (CCore|CUnlinkedDel) ||
1237 tvc->flockCount)) panic("Dead vnode has core/unlinkedel/flock");
1239 if (doflocks && tvc->flockCount != 0) {
1240 /* if this entry has an flock, send a keep-alive call out */
1242 ReleaseReadLock(&afs_xvcache);
1243 ObtainWriteLock(&tvc->lock, 51);
1245 afs_InitReq(&treq, afs_osi_credp);
1246 treq.flags |= O_NONBLOCK;
1248 tc = afs_Conn(&tvc->f.fid, &treq, SHARED_LOCK);
1250 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_EXTENDLOCK);
1253 RXAFS_ExtendLock(tc->id,
1254 (struct AFSFid *)&tvc->f.fid.Fid,
1260 } while (afs_Analyze
1261 (tc, code, &tvc->f.fid, &treq,
1262 AFS_STATS_FS_RPCIDX_EXTENDLOCK, SHARED_LOCK, NULL));
1264 ReleaseWriteLock(&tvc->lock);
1265 #ifdef AFS_DARWIN80_ENV
1267 ObtainReadLock(&afs_xvcache);
1269 ObtainReadLock(&afs_xvcache);
1274 if ((tvc->f.states & CCore) || (tvc->f.states & CUnlinkedDel)) {
1276 * Don't let it evaporate in case someone else is in
1277 * this code. Also, drop the afs_xvcache lock while
1278 * getting vcache locks.
1281 ReleaseReadLock(&afs_xvcache);
1282 #ifdef AFS_BOZONLOCK_ENV
1283 afs_BozonLock(&tvc->pvnLock, tvc);
1285 #if defined(AFS_SGI_ENV)
1287 * That's because if we come in via the CUnlinkedDel bit state path we'll be have 0 refcnt
1289 osi_Assert(VREFCOUNT_GT(tvc,0));
1290 AFS_RWLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1292 ObtainWriteLock(&tvc->lock, 52);
1293 if (tvc->f.states & CCore) {
1294 tvc->f.states &= ~CCore;
1295 /* XXXX Find better place-holder for cred XXXX */
1296 cred = (afs_ucred_t *)tvc->linkData;
1297 tvc->linkData = NULL; /* XXX */
1298 afs_InitReq(&ureq, cred);
1299 afs_Trace2(afs_iclSetp, CM_TRACE_ACTCCORE,
1300 ICL_TYPE_POINTER, tvc, ICL_TYPE_INT32,
1301 tvc->execsOrWriters);
1302 code = afs_StoreOnLastReference(tvc, &ureq);
1303 ReleaseWriteLock(&tvc->lock);
1304 #ifdef AFS_BOZONLOCK_ENV
1305 afs_BozonUnlock(&tvc->pvnLock, tvc);
1307 hzero(tvc->flushDV);
1310 if (code && code != VNOVNODE) {
1311 afs_StoreWarn(code, tvc->f.fid.Fid.Volume,
1312 /* /dev/console */ 1);
1314 } else if (tvc->f.states & CUnlinkedDel) {
1318 ReleaseWriteLock(&tvc->lock);
1319 #ifdef AFS_BOZONLOCK_ENV
1320 afs_BozonUnlock(&tvc->pvnLock, tvc);
1322 #if defined(AFS_SGI_ENV)
1323 AFS_RWUNLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1325 afs_remunlink(tvc, 0);
1326 #if defined(AFS_SGI_ENV)
1327 AFS_RWLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1330 /* lost (or won, perhaps) the race condition */
1331 ReleaseWriteLock(&tvc->lock);
1332 #ifdef AFS_BOZONLOCK_ENV
1333 afs_BozonUnlock(&tvc->pvnLock, tvc);
1336 #if defined(AFS_SGI_ENV)
1337 AFS_RWUNLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1339 #ifdef AFS_DARWIN80_ENV
1342 AFS_RELE(AFSTOV(tvc));
1343 /* Matches write code setting CCore flag */
1346 ObtainReadLock(&afs_xvcache);
1348 ObtainReadLock(&afs_xvcache);
1351 AFS_RELE(AFSTOV(tvc));
1352 /* Matches write code setting CCore flag */
1359 ReleaseReadLock(&afs_xvcache);
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 : Ptr to vcache entry to verify.
1380 * Make sure a cache entry is up-to-date status-wise.
1382 * NOTE: everywhere that calls this can potentially be sped up
1383 * by checking CStatd first, and avoiding doing the InitReq
1384 * if this is up-to-date.
1386 * Anymore, the only places that call this KNOW already that the
1387 * vcache is not up-to-date, so we don't screw around.
1389 * \param avc Pointer to vcache entry to verify.
1392 * \return 0 for success or other error codes.
1395 afs_VerifyVCache2(struct vcache *avc, struct vrequest *areq)
1397 register struct vcache *tvc;
1399 AFS_STATCNT(afs_VerifyVCache);
1401 /* otherwise we must fetch the status info */
1403 ObtainWriteLock(&avc->lock, 53);
1404 if (avc->f.states & CStatd) {
1405 ReleaseWriteLock(&avc->lock);
1408 ObtainWriteLock(&afs_xcbhash, 461);
1409 avc->f.states &= ~(CStatd | CUnique);
1410 avc->callback = NULL;
1411 afs_DequeueCallback(avc);
1412 ReleaseWriteLock(&afs_xcbhash);
1413 ReleaseWriteLock(&avc->lock);
1415 /* since we've been called back, or the callback has expired,
1416 * it's possible that the contents of this directory, or this
1417 * file's name have changed, thus invalidating the dnlc contents.
1419 if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
1420 osi_dnlc_purgedp(avc);
1422 osi_dnlc_purgevp(avc);
1424 /* fetch the status info */
1425 tvc = afs_GetVCache(&avc->f.fid, areq, NULL, avc);
1428 /* Put it back; caller has already incremented vrefCount */
1432 } /*afs_VerifyVCache */
1436 * Simple copy of stat info into cache.
1438 * Callers:as of 1992-04-29, only called by WriteVCache
1440 * \param avc Ptr to vcache entry involved.
1441 * \param astat Ptr to stat info to copy.
1445 afs_SimpleVStat(register struct vcache *avc,
1446 register struct AFSFetchStatus *astat, struct vrequest *areq)
1449 AFS_STATCNT(afs_SimpleVStat);
1452 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1453 && !AFS_VN_MAPPED((vnode_t *) avc)) {
1455 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)) {
1457 #ifdef AFS_64BIT_CLIENT
1458 FillInt64(length, astat->Length_hi, astat->Length);
1459 #else /* AFS_64BIT_CLIENT */
1460 length = astat->Length;
1461 #endif /* AFS_64BIT_CLIENT */
1462 #if defined(AFS_SGI_ENV)
1463 osi_Assert((valusema(&avc->vc_rwlock) <= 0)
1464 && (OSI_GET_LOCKID() == avc->vc_rwlockid));
1465 if (length < avc->f.m.Length) {
1466 vnode_t *vp = (vnode_t *) avc;
1468 osi_Assert(WriteLocked(&avc->lock));
1469 ReleaseWriteLock(&avc->lock);
1471 PTOSSVP(vp, (off_t) length, (off_t) MAXLONG);
1473 ObtainWriteLock(&avc->lock, 67);
1476 /* if writing the file, don't fetch over this value */
1477 afs_Trace3(afs_iclSetp, CM_TRACE_SIMPLEVSTAT, ICL_TYPE_POINTER, avc,
1478 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length),
1479 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1480 avc->f.m.Length = length;
1481 avc->f.m.Date = astat->ClientModTime;
1483 avc->f.m.Owner = astat->Owner;
1484 avc->f.m.Group = astat->Group;
1485 avc->f.m.Mode = astat->UnixModeBits;
1486 if (vType(avc) == VREG) {
1487 avc->f.m.Mode |= S_IFREG;
1488 } else if (vType(avc) == VDIR) {
1489 avc->f.m.Mode |= S_IFDIR;
1490 } else if (vType(avc) == VLNK) {
1491 avc->f.m.Mode |= S_IFLNK;
1492 if ((avc->f.m.Mode & 0111) == 0)
1495 if (avc->f.states & CForeign) {
1496 struct axscache *ac;
1497 avc->f.anyAccess = astat->AnonymousAccess;
1499 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1501 * Caller has at least one bit not covered by anonymous, and
1502 * thus may have interesting rights.
1504 * HOWEVER, this is a really bad idea, because any access query
1505 * for bits which aren't covered by anonymous, on behalf of a user
1506 * who doesn't have any special rights, will result in an answer of
1507 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1508 * It's an especially bad idea under Ultrix, since (due to the lack of
1509 * a proper access() call) it must perform several afs_access() calls
1510 * in order to create magic mode bits that vary according to who makes
1511 * the call. In other words, _every_ stat() generates a test for
1514 #endif /* badidea */
1515 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1516 ac->axess = astat->CallerAccess;
1517 else /* not found, add a new one if possible */
1518 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1521 } /*afs_SimpleVStat */
1525 * Store the status info *only* back to the server for a
1528 * Environment: Must be called with a shared lock held on the vnode.
1530 * \param avc Ptr to the vcache entry.
1531 * \param astatus Ptr to the status info to store.
1532 * \param areq Ptr to the associated vrequest.
1534 * \return Operation status.
1538 afs_WriteVCache(register struct vcache *avc,
1539 register struct AFSStoreStatus *astatus,
1540 struct vrequest *areq)
1543 struct afs_conn *tc;
1544 struct AFSFetchStatus OutStatus;
1545 struct AFSVolSync tsync;
1547 AFS_STATCNT(afs_WriteVCache);
1548 afs_Trace2(afs_iclSetp, CM_TRACE_WVCACHE, ICL_TYPE_POINTER, avc,
1549 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length));
1551 tc = afs_Conn(&avc->f.fid, areq, SHARED_LOCK);
1553 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STORESTATUS);
1556 RXAFS_StoreStatus(tc->id, (struct AFSFid *)&avc->f.fid.Fid,
1557 astatus, &OutStatus, &tsync);
1562 } while (afs_Analyze
1563 (tc, code, &avc->f.fid, areq, AFS_STATS_FS_RPCIDX_STORESTATUS,
1564 SHARED_LOCK, NULL));
1566 UpgradeSToWLock(&avc->lock, 20);
1568 /* success, do the changes locally */
1569 afs_SimpleVStat(avc, &OutStatus, areq);
1571 * Update the date, too. SimpleVStat didn't do this, since
1572 * it thought we were doing this after fetching new status
1573 * over a file being written.
1575 avc->f.m.Date = OutStatus.ClientModTime;
1577 /* failure, set up to check with server next time */
1578 ObtainWriteLock(&afs_xcbhash, 462);
1579 afs_DequeueCallback(avc);
1580 avc->f.states &= ~(CStatd | CUnique); /* turn off stat valid flag */
1581 ReleaseWriteLock(&afs_xcbhash);
1582 if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
1583 osi_dnlc_purgedp(avc); /* if it (could be) a directory */
1585 ConvertWToSLock(&avc->lock);
1588 } /*afs_WriteVCache */
1589 #if defined(AFS_DISCON_ENV)
1592 * Store status info only locally, set the proper disconnection flags
1593 * and add to dirty list.
1595 * \param avc The vcache to be written locally.
1596 * \param astatus Get attr fields from local store.
1597 * \param attrs This one is only of the vs_size.
1599 * \note Must be called with a shared lock on the vnode
1601 int afs_WriteVCacheDiscon(register struct vcache *avc,
1602 register struct AFSStoreStatus *astatus,
1603 struct vattr *attrs)
1606 afs_int32 flags = 0;
1608 UpgradeSToWLock(&avc->lock, 700);
1610 if (!astatus->Mask) {
1616 /* Set attributes. */
1617 if (astatus->Mask & AFS_SETMODTIME) {
1618 avc->f.m.Date = astatus->ClientModTime;
1619 flags |= VDisconSetTime;
1622 if (astatus->Mask & AFS_SETOWNER) {
1623 printf("Not allowed yet. \n");
1624 /*avc->f.m.Owner = astatus->Owner;*/
1627 if (astatus->Mask & AFS_SETGROUP) {
1628 printf("Not allowed yet. \n");
1629 /*avc->f.m.Group = astatus->Group;*/
1632 if (astatus->Mask & AFS_SETMODE) {
1633 avc->f.m.Mode = astatus->UnixModeBits;
1635 #if 0 /* XXX: Leaving this out, so it doesn't mess up the file type flag.*/
1637 if (vType(avc) == VREG) {
1638 avc->f.m.Mode |= S_IFREG;
1639 } else if (vType(avc) == VDIR) {
1640 avc->f.m.Mode |= S_IFDIR;
1641 } else if (vType(avc) == VLNK) {
1642 avc->f.m.Mode |= S_IFLNK;
1643 if ((avc->f.m.Mode & 0111) == 0)
1647 flags |= VDisconSetMode;
1648 } /* if(astatus.Mask & AFS_SETMODE) */
1650 } /* if (!astatus->Mask) */
1652 if (attrs->va_size > 0) {
1653 /* XXX: Do I need more checks? */
1654 /* Truncation operation. */
1655 flags |= VDisconTrunc;
1659 afs_DisconAddDirty(avc, flags, 1);
1661 /* XXX: How about the rest of the fields? */
1663 ConvertWToSLock(&avc->lock);
1671 * Copy astat block into vcache info
1673 * \note This code may get dataversion and length out of sync if the file has
1674 * been modified. This is less than ideal. I haven't thought about it sufficiently
1675 * to be certain that it is adequate.
1677 * \note Environment: Must be called under a write lock
1679 * \param avc Ptr to vcache entry.
1680 * \param astat Ptr to stat block to copy in.
1681 * \param areq Ptr to associated request.
1684 afs_ProcessFS(register struct vcache *avc,
1685 register struct AFSFetchStatus *astat, struct vrequest *areq)
1688 AFS_STATCNT(afs_ProcessFS);
1690 #ifdef AFS_64BIT_CLIENT
1691 FillInt64(length, astat->Length_hi, astat->Length);
1692 #else /* AFS_64BIT_CLIENT */
1693 length = astat->Length;
1694 #endif /* AFS_64BIT_CLIENT */
1695 /* WARNING: afs_DoBulkStat uses the Length field to store a sequence
1696 * number for each bulk status request. Under no circumstances
1697 * should afs_DoBulkStat store a sequence number if the new
1698 * length will be ignored when afs_ProcessFS is called with
1699 * new stats. If you change the following conditional then you
1700 * also need to change the conditional in afs_DoBulkStat. */
1702 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1703 && !AFS_VN_MAPPED((vnode_t *) avc)) {
1705 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)) {
1707 /* if we're writing or mapping this file, don't fetch over these
1710 afs_Trace3(afs_iclSetp, CM_TRACE_PROCESSFS, ICL_TYPE_POINTER, avc,
1711 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length),
1712 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1713 avc->f.m.Length = length;
1714 avc->f.m.Date = astat->ClientModTime;
1716 hset64(avc->f.m.DataVersion, astat->dataVersionHigh, astat->DataVersion);
1717 avc->f.m.Owner = astat->Owner;
1718 avc->f.m.Mode = astat->UnixModeBits;
1719 avc->f.m.Group = astat->Group;
1720 avc->f.m.LinkCount = astat->LinkCount;
1721 if (astat->FileType == File) {
1722 vSetType(avc, VREG);
1723 avc->f.m.Mode |= S_IFREG;
1724 } else if (astat->FileType == Directory) {
1725 vSetType(avc, VDIR);
1726 avc->f.m.Mode |= S_IFDIR;
1727 } else if (astat->FileType == SymbolicLink) {
1728 if (afs_fakestat_enable && (avc->f.m.Mode & 0111) == 0) {
1729 vSetType(avc, VDIR);
1730 avc->f.m.Mode |= S_IFDIR;
1732 vSetType(avc, VLNK);
1733 avc->f.m.Mode |= S_IFLNK;
1735 if ((avc->f.m.Mode & 0111) == 0) {
1739 avc->f.anyAccess = astat->AnonymousAccess;
1741 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1743 * Caller has at least one bit not covered by anonymous, and
1744 * thus may have interesting rights.
1746 * HOWEVER, this is a really bad idea, because any access query
1747 * for bits which aren't covered by anonymous, on behalf of a user
1748 * who doesn't have any special rights, will result in an answer of
1749 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1750 * It's an especially bad idea under Ultrix, since (due to the lack of
1751 * a proper access() call) it must perform several afs_access() calls
1752 * in order to create magic mode bits that vary according to who makes
1753 * the call. In other words, _every_ stat() generates a test for
1756 #endif /* badidea */
1758 struct axscache *ac;
1759 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1760 ac->axess = astat->CallerAccess;
1761 else /* not found, add a new one if possible */
1762 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1764 } /*afs_ProcessFS */
1768 * Get fid from server.
1771 * \param areq Request to be passed on.
1772 * \param name Name of ?? to lookup.
1773 * \param OutStatus Fetch status.
1778 * \return Success status of operation.
1781 afs_RemoteLookup(register struct VenusFid *afid, struct vrequest *areq,
1782 char *name, struct VenusFid *nfid,
1783 struct AFSFetchStatus *OutStatusp,
1784 struct AFSCallBack *CallBackp, struct server **serverp,
1785 struct AFSVolSync *tsyncp)
1789 register struct afs_conn *tc;
1790 struct AFSFetchStatus OutDirStatus;
1793 name = ""; /* XXX */
1795 tc = afs_Conn(afid, areq, SHARED_LOCK);
1798 *serverp = tc->srvr->server;
1800 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_XLOOKUP);
1803 RXAFS_Lookup(tc->id, (struct AFSFid *)&afid->Fid, name,
1804 (struct AFSFid *)&nfid->Fid, OutStatusp,
1805 &OutDirStatus, CallBackp, tsyncp);
1810 } while (afs_Analyze
1811 (tc, code, afid, areq, AFS_STATS_FS_RPCIDX_XLOOKUP, SHARED_LOCK,
1821 * Given a file id and a vrequest structure, fetch the status
1822 * information associated with the file.
1824 * \param afid File ID.
1825 * \param areq Ptr to associated vrequest structure, specifying the
1826 * user whose authentication tokens will be used.
1827 * \param avc Caller may already have a vcache for this file, which is
1830 * \note Environment:
1831 * The cache entry is returned with an increased vrefCount field.
1832 * The entry must be discarded by calling afs_PutVCache when you
1833 * are through using the pointer to the cache entry.
1835 * You should not hold any locks when calling this function, except
1836 * locks on other vcache entries. If you lock more than one vcache
1837 * entry simultaneously, you should lock them in this order:
1839 * 1. Lock all files first, then directories.
1840 * 2. Within a particular type, lock entries in Fid.Vnode order.
1842 * This locking hierarchy is convenient because it allows locking
1843 * of a parent dir cache entry, given a file (to check its access
1844 * control list). It also allows renames to be handled easily by
1845 * locking directories in a constant order.
1847 * \note NB. NewVCache -> FlushVCache presently (4/10/95) drops the xvcache lock.
1849 * \note Might have a vcache structure already, which must
1850 * already be held by the caller
1853 afs_GetVCache(register struct VenusFid *afid, struct vrequest *areq,
1854 afs_int32 * cached, struct vcache *avc)
1857 afs_int32 code, newvcache = 0;
1858 register struct vcache *tvc;
1862 AFS_STATCNT(afs_GetVCache);
1865 *cached = 0; /* Init just in case */
1867 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1871 ObtainSharedLock(&afs_xvcache, 5);
1873 tvc = afs_FindVCache(afid, &retry, DO_STATS | DO_VLRU | IS_SLOCK);
1875 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1876 ReleaseSharedLock(&afs_xvcache);
1877 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1885 osi_Assert((tvc->f.states & CVInit) == 0);
1886 /* If we are in readdir, return the vnode even if not statd */
1887 if ((tvc->f.states & CStatd) || afs_InReadDir(tvc)) {
1888 ReleaseSharedLock(&afs_xvcache);
1892 UpgradeSToWLock(&afs_xvcache, 21);
1894 /* no cache entry, better grab one */
1895 tvc = afs_NewVCache(afid, NULL);
1898 ConvertWToSLock(&afs_xvcache);
1901 ReleaseSharedLock(&afs_xvcache);
1905 afs_stats_cmperf.vcacheMisses++;
1908 ReleaseSharedLock(&afs_xvcache);
1910 ObtainWriteLock(&tvc->lock, 54);
1912 if (tvc->f.states & CStatd) {
1913 ReleaseWriteLock(&tvc->lock);
1916 #ifdef AFS_DARWIN80_ENV
1917 /* Darwin 8.0 only has bufs in nfs, so we shouldn't have to worry about them.
1920 #if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
1922 * XXX - I really don't like this. Should try to understand better.
1923 * It seems that sometimes, when we get called, we already hold the
1924 * lock on the vnode (e.g., from afs_getattr via afs_VerifyVCache).
1925 * We can't drop the vnode lock, because that could result in a race.
1926 * Sometimes, though, we get here and don't hold the vnode lock.
1927 * I hate code paths that sometimes hold locks and sometimes don't.
1928 * In any event, the dodge we use here is to check whether the vnode
1929 * is locked, and if it isn't, then we gain and drop it around the call
1930 * to vinvalbuf; otherwise, we leave it alone.
1933 struct vnode *vp = AFSTOV(tvc);
1936 #if defined(AFS_DARWIN_ENV)
1937 iheldthelock = VOP_ISLOCKED(vp);
1939 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, current_proc());
1940 /* this is messy. we can call fsync which will try to reobtain this */
1941 if (VTOAFS(vp) == tvc)
1942 ReleaseWriteLock(&tvc->lock);
1943 if (UBCINFOEXISTS(vp)) {
1944 vinvalbuf(vp, V_SAVE, &afs_osi_cred, current_proc(), PINOD, 0);
1946 if (VTOAFS(vp) == tvc)
1947 ObtainWriteLock(&tvc->lock, 954);
1949 VOP_UNLOCK(vp, LK_EXCLUSIVE, current_proc());
1950 #elif defined(AFS_FBSD80_ENV)
1951 iheldthelock = VOP_ISLOCKED(vp);
1952 if (!iheldthelock) {
1953 /* nosleep/sleep lock order reversal */
1954 int glocked = ISAFS_GLOCK();
1957 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
1961 vinvalbuf(vp, V_SAVE, PINOD, 0); /* changed late in 8.0-CURRENT */
1964 #elif defined(AFS_FBSD60_ENV)
1965 iheldthelock = VOP_ISLOCKED(vp, curthread);
1967 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread);
1968 vinvalbuf(vp, V_SAVE, curthread, PINOD, 0);
1970 VOP_UNLOCK(vp, LK_EXCLUSIVE, curthread);
1971 #elif defined(AFS_FBSD50_ENV)
1972 iheldthelock = VOP_ISLOCKED(vp, curthread);
1974 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread);
1975 vinvalbuf(vp, V_SAVE, osi_curcred(), curthread, PINOD, 0);
1977 VOP_UNLOCK(vp, LK_EXCLUSIVE, curthread);
1978 #elif defined(AFS_FBSD40_ENV)
1979 iheldthelock = VOP_ISLOCKED(vp, curproc);
1981 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curproc);
1982 vinvalbuf(vp, V_SAVE, osi_curcred(), curproc, PINOD, 0);
1984 VOP_UNLOCK(vp, LK_EXCLUSIVE, curproc);
1985 #elif defined(AFS_OBSD_ENV)
1986 iheldthelock = VOP_ISLOCKED(vp, curproc);
1988 VOP_LOCK(vp, LK_EXCLUSIVE | LK_RETRY, curproc);
1989 uvm_vnp_uncache(vp);
1991 VOP_UNLOCK(vp, 0, curproc);
1997 ObtainWriteLock(&afs_xcbhash, 464);
1998 tvc->f.states &= ~CUnique;
2000 afs_DequeueCallback(tvc);
2001 ReleaseWriteLock(&afs_xcbhash);
2003 /* It is always appropriate to throw away all the access rights? */
2004 afs_FreeAllAxs(&(tvc->Access));
2005 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-volume info */
2007 if ((tvp->states & VForeign)) {
2009 tvc->f.states |= CForeign;
2010 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
2011 && (tvp->rootUnique == afid->Fid.Unique)) {
2015 if (tvp->states & VRO)
2016 tvc->f.states |= CRO;
2017 if (tvp->states & VBackup)
2018 tvc->f.states |= CBackup;
2019 /* now copy ".." entry back out of volume structure, if necessary */
2020 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
2022 tvc->mvid = (struct VenusFid *)
2023 osi_AllocSmallSpace(sizeof(struct VenusFid));
2024 *tvc->mvid = tvp->dotdot;
2026 afs_PutVolume(tvp, READ_LOCK);
2030 afs_RemoveVCB(afid);
2032 struct AFSFetchStatus OutStatus;
2034 if (afs_DynrootNewVnode(tvc, &OutStatus)) {
2035 afs_ProcessFS(tvc, &OutStatus, areq);
2036 tvc->f.states |= CStatd | CUnique;
2037 tvc->f.parent.vnode = OutStatus.ParentVnode;
2038 tvc->f.parent.unique = OutStatus.ParentUnique;
2042 if (AFS_IS_DISCONNECTED) {
2043 /* Nothing to do otherwise...*/
2045 printf("Network is down in afs_GetCache");
2047 code = afs_FetchStatus(tvc, afid, areq, &OutStatus);
2049 /* For the NFS translator's benefit, make sure
2050 * non-directory vnodes always have their parent FID set
2051 * correctly, even when created as a result of decoding an
2052 * NFS filehandle. It would be nice to also do this for
2053 * directories, but we can't because the fileserver fills
2054 * in the FID of the directory itself instead of that of
2057 if (!code && OutStatus.FileType != Directory &&
2058 !tvc->f.parent.vnode) {
2059 tvc->f.parent.vnode = OutStatus.ParentVnode;
2060 tvc->f.parent.unique = OutStatus.ParentUnique;
2061 /* XXX - SXW - It's conceivable we should mark ourselves
2062 * as dirty again here, incase we've been raced
2063 * out of the FetchStatus call.
2070 ReleaseWriteLock(&tvc->lock);
2076 ReleaseWriteLock(&tvc->lock);
2079 } /*afs_GetVCache */
2084 * Lookup a vcache by fid. Look inside the cache first, if not
2085 * there, lookup the file on the server, and then get it's fresh
2090 * \param cached Is element cached? If NULL, don't answer.
2094 * \return The found element or NULL.
2097 afs_LookupVCache(struct VenusFid *afid, struct vrequest *areq,
2098 afs_int32 * cached, struct vcache *adp, char *aname)
2100 afs_int32 code, now, newvcache = 0;
2101 struct VenusFid nfid;
2102 register struct vcache *tvc;
2104 struct AFSFetchStatus OutStatus;
2105 struct AFSCallBack CallBack;
2106 struct AFSVolSync tsync;
2107 struct server *serverp = 0;
2111 AFS_STATCNT(afs_GetVCache);
2113 *cached = 0; /* Init just in case */
2115 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2119 ObtainReadLock(&afs_xvcache);
2120 tvc = afs_FindVCache(afid, &retry, DO_STATS /* no vlru */ );
2123 ReleaseReadLock(&afs_xvcache);
2125 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2126 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2130 ObtainReadLock(&tvc->lock);
2132 if (tvc->f.states & CStatd) {
2136 ReleaseReadLock(&tvc->lock);
2139 tvc->f.states &= ~CUnique;
2141 ReleaseReadLock(&tvc->lock);
2143 ObtainReadLock(&afs_xvcache);
2146 ReleaseReadLock(&afs_xvcache);
2148 /* lookup the file */
2151 origCBs = afs_allCBs; /* if anything changes, we don't have a cb */
2153 if (AFS_IS_DISCONNECTED) {
2154 printf("Network is down in afs_LookupVcache\n");
2158 afs_RemoteLookup(&adp->f.fid, areq, aname, &nfid, &OutStatus,
2159 &CallBack, &serverp, &tsync);
2161 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2165 ObtainSharedLock(&afs_xvcache, 6);
2166 tvc = afs_FindVCache(&nfid, &retry, DO_VLRU | IS_SLOCK/* no xstats now */ );
2168 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2169 ReleaseSharedLock(&afs_xvcache);
2170 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2176 /* no cache entry, better grab one */
2177 UpgradeSToWLock(&afs_xvcache, 22);
2178 tvc = afs_NewVCache(&nfid, serverp);
2180 ConvertWToSLock(&afs_xvcache);
2183 ReleaseSharedLock(&afs_xvcache);
2188 ReleaseSharedLock(&afs_xvcache);
2189 ObtainWriteLock(&tvc->lock, 55);
2191 /* It is always appropriate to throw away all the access rights? */
2192 afs_FreeAllAxs(&(tvc->Access));
2193 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-vol info */
2195 if ((tvp->states & VForeign)) {
2197 tvc->f.states |= CForeign;
2198 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
2199 && (tvp->rootUnique == afid->Fid.Unique))
2202 if (tvp->states & VRO)
2203 tvc->f.states |= CRO;
2204 if (tvp->states & VBackup)
2205 tvc->f.states |= CBackup;
2206 /* now copy ".." entry back out of volume structure, if necessary */
2207 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
2209 tvc->mvid = (struct VenusFid *)
2210 osi_AllocSmallSpace(sizeof(struct VenusFid));
2211 *tvc->mvid = tvp->dotdot;
2216 ObtainWriteLock(&afs_xcbhash, 465);
2217 afs_DequeueCallback(tvc);
2218 tvc->f.states &= ~(CStatd | CUnique);
2219 ReleaseWriteLock(&afs_xcbhash);
2220 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2221 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2223 afs_PutVolume(tvp, READ_LOCK);
2224 ReleaseWriteLock(&tvc->lock);
2229 ObtainWriteLock(&afs_xcbhash, 466);
2230 if (origCBs == afs_allCBs) {
2231 if (CallBack.ExpirationTime) {
2232 tvc->callback = serverp;
2233 tvc->cbExpires = CallBack.ExpirationTime + now;
2234 tvc->f.states |= CStatd | CUnique;
2235 tvc->f.states &= ~CBulkFetching;
2236 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvp);
2237 } else if (tvc->f.states & CRO) {
2238 /* adapt gives us an hour. */
2239 tvc->cbExpires = 3600 + osi_Time();
2240 /*XXX*/ tvc->f.states |= CStatd | CUnique;
2241 tvc->f.states &= ~CBulkFetching;
2242 afs_QueueCallback(tvc, CBHash(3600), tvp);
2244 tvc->callback = NULL;
2245 afs_DequeueCallback(tvc);
2246 tvc->f.states &= ~(CStatd | CUnique);
2247 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2248 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2251 afs_DequeueCallback(tvc);
2252 tvc->f.states &= ~CStatd;
2253 tvc->f.states &= ~CUnique;
2254 tvc->callback = NULL;
2255 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2256 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2258 ReleaseWriteLock(&afs_xcbhash);
2260 afs_PutVolume(tvp, READ_LOCK);
2261 afs_ProcessFS(tvc, &OutStatus, areq);
2263 ReleaseWriteLock(&tvc->lock);
2269 afs_GetRootVCache(struct VenusFid *afid, struct vrequest *areq,
2270 afs_int32 * cached, struct volume *tvolp)
2272 afs_int32 code = 0, i, newvcache = 0, haveStatus = 0;
2273 afs_int32 getNewFid = 0;
2275 struct VenusFid nfid;
2276 register struct vcache *tvc;
2277 struct server *serverp = 0;
2278 struct AFSFetchStatus OutStatus;
2279 struct AFSCallBack CallBack;
2280 struct AFSVolSync tsync;
2282 #ifdef AFS_DARWIN80_ENV
2289 if (!tvolp->rootVnode || getNewFid) {
2290 struct VenusFid tfid;
2293 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
2294 origCBs = afs_allCBs; /* ignore InitCallBackState */
2296 afs_RemoteLookup(&tfid, areq, NULL, &nfid, &OutStatus, &CallBack,
2301 /* ReleaseReadLock(&tvolp->lock); */
2302 ObtainWriteLock(&tvolp->lock, 56);
2303 tvolp->rootVnode = afid->Fid.Vnode = nfid.Fid.Vnode;
2304 tvolp->rootUnique = afid->Fid.Unique = nfid.Fid.Unique;
2305 ReleaseWriteLock(&tvolp->lock);
2306 /* ObtainReadLock(&tvolp->lock);*/
2309 afid->Fid.Vnode = tvolp->rootVnode;
2310 afid->Fid.Unique = tvolp->rootUnique;
2314 ObtainSharedLock(&afs_xvcache, 7);
2316 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2317 if (!FidCmp(&(tvc->f.fid), afid)) {
2318 if (tvc->f.states & CVInit) {
2319 ReleaseSharedLock(&afs_xvcache);
2320 afs_osi_Sleep(&tvc->f.states);
2323 #ifdef AFS_DARWIN80_ENV
2324 if (tvc->f.states & CDeadVnode) {
2325 ReleaseSharedLock(&afs_xvcache);
2326 afs_osi_Sleep(&tvc->f.states);
2330 if (vnode_get(tvp)) /* this bumps ref count */
2332 if (vnode_ref(tvp)) {
2334 /* AFSTOV(tvc) may be NULL */
2344 if (!haveStatus && (!tvc || !(tvc->f.states & CStatd))) {
2345 /* Mount point no longer stat'd or unknown. FID may have changed. */
2347 ReleaseSharedLock(&afs_xvcache);
2348 #ifdef AFS_DARWIN80_ENV
2351 vnode_put(AFSTOV(tvc));
2352 vnode_rele(AFSTOV(tvc));
2361 UpgradeSToWLock(&afs_xvcache, 23);
2362 /* no cache entry, better grab one */
2363 tvc = afs_NewVCache(afid, NULL);
2366 ReleaseWriteLock(&afs_xvcache);
2370 afs_stats_cmperf.vcacheMisses++;
2374 afs_stats_cmperf.vcacheHits++;
2375 #if defined(AFS_DARWIN80_ENV)
2376 /* we already bumped the ref count in the for loop above */
2377 #else /* AFS_DARWIN80_ENV */
2380 UpgradeSToWLock(&afs_xvcache, 24);
2381 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2382 refpanic("GRVC VLRU inconsistent0");
2384 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2385 refpanic("GRVC VLRU inconsistent1");
2387 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2388 refpanic("GRVC VLRU inconsistent2");
2390 QRemove(&tvc->vlruq); /* move to lruq head */
2391 QAdd(&VLRU, &tvc->vlruq);
2392 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2393 refpanic("GRVC VLRU inconsistent3");
2395 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2396 refpanic("GRVC VLRU inconsistent4");
2398 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2399 refpanic("GRVC VLRU inconsistent5");
2404 ReleaseWriteLock(&afs_xvcache);
2406 if (tvc->f.states & CStatd) {
2410 ObtainReadLock(&tvc->lock);
2411 tvc->f.states &= ~CUnique;
2412 tvc->callback = NULL; /* redundant, perhaps */
2413 ReleaseReadLock(&tvc->lock);
2416 ObtainWriteLock(&tvc->lock, 57);
2418 /* It is always appropriate to throw away all the access rights? */
2419 afs_FreeAllAxs(&(tvc->Access));
2422 tvc->f.states |= CForeign;
2423 if (tvolp->states & VRO)
2424 tvc->f.states |= CRO;
2425 if (tvolp->states & VBackup)
2426 tvc->f.states |= CBackup;
2427 /* now copy ".." entry back out of volume structure, if necessary */
2428 if (newvcache && (tvolp->rootVnode == afid->Fid.Vnode)
2429 && (tvolp->rootUnique == afid->Fid.Unique)) {
2432 if (tvc->mvstat == 2 && tvolp->dotdot.Fid.Volume != 0) {
2434 tvc->mvid = (struct VenusFid *)
2435 osi_AllocSmallSpace(sizeof(struct VenusFid));
2436 *tvc->mvid = tvolp->dotdot;
2440 afs_RemoveVCB(afid);
2443 struct VenusFid tfid;
2446 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
2447 origCBs = afs_allCBs; /* ignore InitCallBackState */
2449 afs_RemoteLookup(&tfid, areq, NULL, &nfid, &OutStatus, &CallBack,
2454 ObtainWriteLock(&afs_xcbhash, 467);
2455 afs_DequeueCallback(tvc);
2456 tvc->callback = NULL;
2457 tvc->f.states &= ~(CStatd | CUnique);
2458 ReleaseWriteLock(&afs_xcbhash);
2459 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2460 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2461 ReleaseWriteLock(&tvc->lock);
2466 ObtainWriteLock(&afs_xcbhash, 468);
2467 if (origCBs == afs_allCBs) {
2468 tvc->f.states |= CTruth;
2469 tvc->callback = serverp;
2470 if (CallBack.ExpirationTime != 0) {
2471 tvc->cbExpires = CallBack.ExpirationTime + start;
2472 tvc->f.states |= CStatd;
2473 tvc->f.states &= ~CBulkFetching;
2474 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvolp);
2475 } else if (tvc->f.states & CRO) {
2476 /* adapt gives us an hour. */
2477 tvc->cbExpires = 3600 + osi_Time();
2478 /*XXX*/ tvc->f.states |= CStatd;
2479 tvc->f.states &= ~CBulkFetching;
2480 afs_QueueCallback(tvc, CBHash(3600), tvolp);
2483 afs_DequeueCallback(tvc);
2484 tvc->callback = NULL;
2485 tvc->f.states &= ~(CStatd | CUnique);
2486 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2487 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2489 ReleaseWriteLock(&afs_xcbhash);
2490 afs_ProcessFS(tvc, &OutStatus, areq);
2492 ReleaseWriteLock(&tvc->lock);
2498 * Update callback status and (sometimes) attributes of a vnode.
2499 * Called after doing a fetch status RPC. Whilst disconnected, attributes
2500 * shouldn't be written to the vcache here.
2505 * \param Outsp Server status after rpc call.
2506 * \param acb Callback for this vnode.
2508 * \note The vcache must be write locked.
2511 afs_UpdateStatus(struct vcache *avc,
2512 struct VenusFid *afid,
2513 struct vrequest *areq,
2514 struct AFSFetchStatus *Outsp,
2515 struct AFSCallBack *acb,
2518 struct volume *volp;
2521 /* Dont write status in vcache if resyncing after a disconnection. */
2522 afs_ProcessFS(avc, Outsp, areq);
2524 volp = afs_GetVolume(afid, areq, READ_LOCK);
2525 ObtainWriteLock(&afs_xcbhash, 469);
2526 avc->f.states |= CTruth;
2527 if (avc->callback /* check for race */ ) {
2528 if (acb->ExpirationTime != 0) {
2529 avc->cbExpires = acb->ExpirationTime + start;
2530 avc->f.states |= CStatd;
2531 avc->f.states &= ~CBulkFetching;
2532 afs_QueueCallback(avc, CBHash(acb->ExpirationTime), volp);
2533 } else if (avc->f.states & CRO) {
2534 /* ordinary callback on a read-only volume -- AFS 3.2 style */
2535 avc->cbExpires = 3600 + start;
2536 avc->f.states |= CStatd;
2537 avc->f.states &= ~CBulkFetching;
2538 afs_QueueCallback(avc, CBHash(3600), volp);
2540 afs_DequeueCallback(avc);
2541 avc->callback = NULL;
2542 avc->f.states &= ~(CStatd | CUnique);
2543 if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
2544 osi_dnlc_purgedp(avc); /* if it (could be) a directory */
2547 afs_DequeueCallback(avc);
2548 avc->callback = NULL;
2549 avc->f.states &= ~(CStatd | CUnique);
2550 if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
2551 osi_dnlc_purgedp(avc); /* if it (could be) a directory */
2553 ReleaseWriteLock(&afs_xcbhash);
2555 afs_PutVolume(volp, READ_LOCK);
2559 * Must be called with avc write-locked
2560 * don't absolutely have to invalidate the hint unless the dv has
2561 * changed, but be sure to get it right else there will be consistency bugs.
2564 afs_FetchStatus(struct vcache * avc, struct VenusFid * afid,
2565 struct vrequest * areq, struct AFSFetchStatus * Outsp)
2568 afs_uint32 start = 0;
2569 register struct afs_conn *tc;
2570 struct AFSCallBack CallBack;
2571 struct AFSVolSync tsync;
2574 tc = afs_Conn(afid, areq, SHARED_LOCK);
2575 avc->dchint = NULL; /* invalidate hints */
2577 avc->callback = tc->srvr->server;
2579 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_FETCHSTATUS);
2582 RXAFS_FetchStatus(tc->id, (struct AFSFid *)&afid->Fid, Outsp,
2590 } while (afs_Analyze
2591 (tc, code, afid, areq, AFS_STATS_FS_RPCIDX_FETCHSTATUS,
2592 SHARED_LOCK, NULL));
2595 afs_UpdateStatus(avc, afid, areq, Outsp, &CallBack, start);
2597 /* used to undo the local callback, but that's too extreme.
2598 * There are plenty of good reasons that fetchstatus might return
2599 * an error, such as EPERM. If we have the vnode cached, statd,
2600 * with callback, might as well keep track of the fact that we
2601 * don't have access...
2603 if (code == EPERM || code == EACCES) {
2604 struct axscache *ac;
2605 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
2607 else /* not found, add a new one if possible */
2608 afs_AddAxs(avc->Access, areq->uid, 0);
2619 * Stuff some information into the vcache for the given file.
2622 * afid : File in question.
2623 * OutStatus : Fetch status on the file.
2624 * CallBack : Callback info.
2625 * tc : RPC connection involved.
2626 * areq : vrequest involved.
2629 * Nothing interesting.
2632 afs_StuffVcache(register struct VenusFid *afid,
2633 struct AFSFetchStatus *OutStatus,
2634 struct AFSCallBack *CallBack, register struct afs_conn *tc,
2635 struct vrequest *areq)
2637 register afs_int32 code, i, newvcache = 0;
2638 register struct vcache *tvc;
2639 struct AFSVolSync tsync;
2641 struct axscache *ac;
2644 AFS_STATCNT(afs_StuffVcache);
2645 #ifdef IFS_VCACHECOUNT
2650 ObtainSharedLock(&afs_xvcache, 8);
2652 tvc = afs_FindVCache(afid, &retry, DO_VLRU| IS_SLOCK /* no stats */ );
2654 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2655 ReleaseSharedLock(&afs_xvcache);
2656 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2662 /* no cache entry, better grab one */
2663 UpgradeSToWLock(&afs_xvcache, 25);
2664 tvc = afs_NewVCache(afid, NULL);
2666 ConvertWToSLock(&afs_xvcache);
2669 ReleaseSharedLock(&afs_xvcache);
2674 ReleaseSharedLock(&afs_xvcache);
2675 ObtainWriteLock(&tvc->lock, 58);
2677 tvc->f.states &= ~CStatd;
2678 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2679 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2681 /* Is it always appropriate to throw away all the access rights? */
2682 afs_FreeAllAxs(&(tvc->Access));
2684 /*Copy useful per-volume info */
2685 tvp = afs_GetVolume(afid, areq, READ_LOCK);
2687 if (newvcache && (tvp->states & VForeign))
2688 tvc->f.states |= CForeign;
2689 if (tvp->states & VRO)
2690 tvc->f.states |= CRO;
2691 if (tvp->states & VBackup)
2692 tvc->f.states |= CBackup;
2694 * Now, copy ".." entry back out of volume structure, if
2697 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
2699 tvc->mvid = (struct VenusFid *)
2700 osi_AllocSmallSpace(sizeof(struct VenusFid));
2701 *tvc->mvid = tvp->dotdot;
2704 /* store the stat on the file */
2705 afs_RemoveVCB(afid);
2706 afs_ProcessFS(tvc, OutStatus, areq);
2707 tvc->callback = tc->srvr->server;
2709 /* we use osi_Time twice below. Ideally, we would use the time at which
2710 * the FetchStatus call began, instead, but we don't have it here. So we
2711 * make do with "now". In the CRO case, it doesn't really matter. In
2712 * the other case, we hope that the difference between "now" and when the
2713 * call actually began execution on the server won't be larger than the
2714 * padding which the server keeps. Subtract 1 second anyway, to be on
2715 * the safe side. Can't subtract more because we don't know how big
2716 * ExpirationTime is. Possible consistency problems may arise if the call
2717 * timeout period becomes longer than the server's expiration padding. */
2718 ObtainWriteLock(&afs_xcbhash, 470);
2719 if (CallBack->ExpirationTime != 0) {
2720 tvc->cbExpires = CallBack->ExpirationTime + osi_Time() - 1;
2721 tvc->f.states |= CStatd;
2722 tvc->f.states &= ~CBulkFetching;
2723 afs_QueueCallback(tvc, CBHash(CallBack->ExpirationTime), tvp);
2724 } else if (tvc->f.states & CRO) {
2725 /* old-fashioned AFS 3.2 style */
2726 tvc->cbExpires = 3600 + osi_Time();
2727 /*XXX*/ tvc->f.states |= CStatd;
2728 tvc->f.states &= ~CBulkFetching;
2729 afs_QueueCallback(tvc, CBHash(3600), tvp);
2731 afs_DequeueCallback(tvc);
2732 tvc->callback = NULL;
2733 tvc->f.states &= ~(CStatd | CUnique);
2734 if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
2735 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2737 ReleaseWriteLock(&afs_xcbhash);
2739 afs_PutVolume(tvp, READ_LOCK);
2741 /* look in per-pag cache */
2742 if (tvc->Access && (ac = afs_FindAxs(tvc->Access, areq->uid)))
2743 ac->axess = OutStatus->CallerAccess; /* substitute pags */
2744 else /* not found, add a new one if possible */
2745 afs_AddAxs(tvc->Access, areq->uid, OutStatus->CallerAccess);
2747 ReleaseWriteLock(&tvc->lock);
2748 afs_Trace4(afs_iclSetp, CM_TRACE_STUFFVCACHE, ICL_TYPE_POINTER, tvc,
2749 ICL_TYPE_POINTER, tvc->callback, ICL_TYPE_INT32,
2750 tvc->cbExpires, ICL_TYPE_INT32, tvc->cbExpires - osi_Time());
2752 * Release ref count... hope this guy stays around...
2755 } /*afs_StuffVcache */
2759 * Decrements the reference count on a cache entry.
2761 * \param avc Pointer to the cache entry to decrement.
2763 * \note Environment: Nothing interesting.
2766 afs_PutVCache(register struct vcache *avc)
2768 AFS_STATCNT(afs_PutVCache);
2769 #ifdef AFS_DARWIN80_ENV
2770 vnode_put(AFSTOV(avc));
2774 * Can we use a read lock here?
2776 ObtainReadLock(&afs_xvcache);
2778 ReleaseReadLock(&afs_xvcache);
2780 } /*afs_PutVCache */
2784 * Reset a vcache entry, so local contents are ignored, and the
2785 * server will be reconsulted next time the vcache is used
2787 * \param avc Pointer to the cache entry to reset
2790 * \note avc must be write locked on entry
2793 afs_ResetVCache(struct vcache *avc, afs_ucred_t *acred) {
2794 ObtainWriteLock(&afs_xcbhash, 456);
2795 afs_DequeueCallback(avc);
2796 avc->f.states &= ~(CStatd | CDirty); /* next reference will re-stat */
2797 ReleaseWriteLock(&afs_xcbhash);
2798 /* now find the disk cache entries */
2799 afs_TryToSmush(avc, acred, 1);
2800 osi_dnlc_purgedp(avc);
2801 if (avc->linkData && !(avc->f.states & CCore)) {
2802 afs_osi_Free(avc->linkData, strlen(avc->linkData) + 1);
2803 avc->linkData = NULL;
2808 * Sleepa when searching for a vcache. Releases all the pending locks,
2809 * sleeps then obtains the previously released locks.
2811 * \param vcache Enter sleep state.
2812 * \param flag Determines what locks to use.
2816 static void findvc_sleep(struct vcache *avc, int flag) {
2817 if (flag & IS_SLOCK) {
2818 ReleaseSharedLock(&afs_xvcache);
2820 if (flag & IS_WLOCK) {
2821 ReleaseWriteLock(&afs_xvcache);
2823 ReleaseReadLock(&afs_xvcache);
2826 afs_osi_Sleep(&avc->f.states);
2827 if (flag & IS_SLOCK) {
2828 ObtainSharedLock(&afs_xvcache, 341);
2830 if (flag & IS_WLOCK) {
2831 ObtainWriteLock(&afs_xvcache, 343);
2833 ObtainReadLock(&afs_xvcache);
2838 * Find a vcache entry given a fid.
2840 * \param afid Pointer to the fid whose cache entry we desire.
2841 * \param retry (SGI-specific) tell the caller to drop the lock on xvcache,
2842 * unlock the vnode, and try again.
2843 * \param flag Bit 1 to specify whether to compute hit statistics. Not
2844 * set if FindVCache is called as part of internal bookkeeping.
2846 * \note Environment: Must be called with the afs_xvcache lock at least held at
2847 * the read level. In order to do the VLRU adjustment, the xvcache lock
2848 * must be shared-- we upgrade it here.
2852 afs_FindVCache(struct VenusFid *afid, afs_int32 * retry, afs_int32 flag)
2855 register struct vcache *tvc;
2857 #ifdef AFS_DARWIN80_ENV
2861 AFS_STATCNT(afs_FindVCache);
2865 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2866 if (FidMatches(afid, tvc)) {
2867 if (tvc->f.states & CVInit) {
2868 findvc_sleep(tvc, flag);
2871 #ifdef AFS_DARWIN80_ENV
2872 if (tvc->f.states & CDeadVnode) {
2873 findvc_sleep(tvc, flag);
2879 if (vnode_ref(tvp)) {
2881 /* AFSTOV(tvc) may be NULL */
2891 /* should I have a read lock on the vnode here? */
2895 #if !defined(AFS_DARWIN80_ENV)
2896 osi_vnhold(tvc, retry); /* already held, above */
2897 if (retry && *retry)
2900 #if defined(AFS_DARWIN_ENV) && !defined(AFS_DARWIN80_ENV)
2901 tvc->f.states |= CUBCinit;
2903 if (UBCINFOMISSING(AFSTOV(tvc)) ||
2904 UBCINFORECLAIMED(AFSTOV(tvc))) {
2905 ubc_info_init(AFSTOV(tvc));
2908 tvc->f.states &= ~CUBCinit;
2911 * only move to front of vlru if we have proper vcache locking)
2913 if (flag & DO_VLRU) {
2914 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2915 refpanic("FindVC VLRU inconsistent1");
2917 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2918 refpanic("FindVC VLRU inconsistent1");
2920 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2921 refpanic("FindVC VLRU inconsistent2");
2923 UpgradeSToWLock(&afs_xvcache, 26);
2924 QRemove(&tvc->vlruq);
2925 QAdd(&VLRU, &tvc->vlruq);
2926 ConvertWToSLock(&afs_xvcache);
2927 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2928 refpanic("FindVC VLRU inconsistent1");
2930 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2931 refpanic("FindVC VLRU inconsistent2");
2933 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2934 refpanic("FindVC VLRU inconsistent3");
2940 if (flag & DO_STATS) {
2942 afs_stats_cmperf.vcacheHits++;
2944 afs_stats_cmperf.vcacheMisses++;
2945 if (afs_IsPrimaryCellNum(afid->Cell))
2946 afs_stats_cmperf.vlocalAccesses++;
2948 afs_stats_cmperf.vremoteAccesses++;
2951 } /*afs_FindVCache */
2954 * Find a vcache entry given a fid. Does a wildcard match on what we
2955 * have for the fid. If more than one entry, don't return anything.
2957 * \param avcp Fill in pointer if we found one and only one.
2958 * \param afid Pointer to the fid whose cache entry we desire.
2959 * \param retry (SGI-specific) tell the caller to drop the lock on xvcache,
2960 * unlock the vnode, and try again.
2961 * \param flags bit 1 to specify whether to compute hit statistics. Not
2962 * set if FindVCache is called as part of internal bookkeeping.
2964 * \note Environment: Must be called with the afs_xvcache lock at least held at
2965 * the read level. In order to do the VLRU adjustment, the xvcache lock
2966 * must be shared-- we upgrade it here.
2968 * \return Number of matches found.
2971 int afs_duplicate_nfs_fids = 0;
2974 afs_NFSFindVCache(struct vcache **avcp, struct VenusFid *afid)
2976 register struct vcache *tvc;
2978 afs_int32 count = 0;
2979 struct vcache *found_tvc = NULL;
2980 #ifdef AFS_DARWIN80_ENV
2984 AFS_STATCNT(afs_FindVCache);
2988 ObtainSharedLock(&afs_xvcache, 331);
2991 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2992 /* Match only on what we have.... */
2993 if (((tvc->f.fid.Fid.Vnode & 0xffff) == afid->Fid.Vnode)
2994 && (tvc->f.fid.Fid.Volume == afid->Fid.Volume)
2995 && ((tvc->f.fid.Fid.Unique & 0xffffff) == afid->Fid.Unique)
2996 && (tvc->f.fid.Cell == afid->Cell)) {
2997 if (tvc->f.states & CVInit) {
2998 ReleaseSharedLock(&afs_xvcache);
2999 afs_osi_Sleep(&tvc->f.states);
3002 #ifdef AFS_DARWIN80_ENV
3003 if (tvc->f.states & CDeadVnode) {
3004 ReleaseSharedLock(&afs_xvcache);
3005 afs_osi_Sleep(&tvc->f.states);
3009 if (vnode_get(tvp)) {
3010 /* This vnode no longer exists. */
3013 if (vnode_ref(tvp)) {
3014 /* This vnode no longer exists. */
3016 /* AFSTOV(tvc) may be NULL */
3021 #endif /* AFS_DARWIN80_ENV */
3025 afs_duplicate_nfs_fids++;
3026 ReleaseSharedLock(&afs_xvcache);
3027 #ifdef AFS_DARWIN80_ENV
3028 /* Drop our reference counts. */
3029 vnode_put(AFSTOV(tvc));
3030 vnode_put(AFSTOV(found_tvc));
3039 /* should I have a read lock on the vnode here? */
3041 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
3042 afs_int32 retry = 0;
3043 osi_vnhold(tvc, &retry);
3046 found_tvc = (struct vcache *)0;
3047 ReleaseSharedLock(&afs_xvcache);
3048 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
3052 osi_vnhold(tvc, (int *)0); /* already held, above */
3055 * We obtained the xvcache lock above.
3057 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
3058 refpanic("FindVC VLRU inconsistent1");
3060 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
3061 refpanic("FindVC VLRU inconsistent1");
3063 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
3064 refpanic("FindVC VLRU inconsistent2");
3066 UpgradeSToWLock(&afs_xvcache, 568);
3067 QRemove(&tvc->vlruq);
3068 QAdd(&VLRU, &tvc->vlruq);
3069 ConvertWToSLock(&afs_xvcache);
3070 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
3071 refpanic("FindVC VLRU inconsistent1");
3073 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
3074 refpanic("FindVC VLRU inconsistent2");
3076 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
3077 refpanic("FindVC VLRU inconsistent3");
3083 afs_stats_cmperf.vcacheHits++;
3085 afs_stats_cmperf.vcacheMisses++;
3086 if (afs_IsPrimaryCellNum(afid->Cell))
3087 afs_stats_cmperf.vlocalAccesses++;
3089 afs_stats_cmperf.vremoteAccesses++;
3091 *avcp = tvc; /* May be null */
3093 ReleaseSharedLock(&afs_xvcache);
3094 return (tvc ? 1 : 0);
3096 } /*afs_NFSFindVCache */
3102 * Initialize vcache related variables
3107 afs_vcacheInit(int astatSize)
3109 #if !defined(AFS_LINUX22_ENV)
3110 register struct vcache *tvp;
3113 #if defined(AFS_LINUX22_ENV)
3114 if (!afs_maxvcount) {
3115 afs_maxvcount = astatSize; /* no particular limit on linux? */
3116 if (astatSize < afs_maxvcount) {
3117 afs_maxvcount = astatSize;
3120 #else /* AFS_LINUX22_ENV */
3124 AFS_RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
3125 LOCK_INIT(&afs_xvcb, "afs_xvcb");
3127 #if !defined(AFS_LINUX22_ENV)
3128 /* Allocate and thread the struct vcache entries */
3129 tvp = (struct vcache *)afs_osi_Alloc(astatSize * sizeof(struct vcache));
3130 memset(tvp, 0, sizeof(struct vcache) * astatSize);
3132 Initial_freeVCList = tvp;
3133 freeVCList = &(tvp[0]);
3134 for (i = 0; i < astatSize - 1; i++) {
3135 tvp[i].nextfree = &(tvp[i + 1]);
3137 tvp[astatSize - 1].nextfree = NULL;
3138 # ifdef KERNEL_HAVE_PIN
3139 pin((char *)tvp, astatSize * sizeof(struct vcache)); /* XXX */
3143 #if defined(AFS_SGI_ENV)
3144 for (i = 0; i < astatSize; i++) {
3145 char name[METER_NAMSZ];
3146 struct vcache *tvc = &tvp[i];
3148 tvc->v.v_number = ++afsvnumbers;
3149 tvc->vc_rwlockid = OSI_NO_LOCKID;
3150 initnsema(&tvc->vc_rwlock, 1,
3151 makesname(name, "vrw", tvc->v.v_number));
3152 #ifndef AFS_SGI53_ENV
3153 initnsema(&tvc->v.v_sync, 0, makesname(name, "vsy", tvc->v.v_number));
3155 #ifndef AFS_SGI62_ENV
3156 initnlock(&tvc->v.v_lock, makesname(name, "vlk", tvc->v.v_number));
3157 #endif /* AFS_SGI62_ENV */
3161 for(i = 0; i < VCSIZE; ++i)
3162 QInit(&afs_vhashTV[i]);
3169 shutdown_vcache(void)
3172 struct afs_cbr *tsp;
3174 * XXX We may potentially miss some of the vcaches because if when
3175 * there are no free vcache entries and all the vcache entries are active
3176 * ones then we allocate an additional one - admittedly we almost never
3181 register struct afs_q *tq, *uq = NULL;
3182 register struct vcache *tvc;
3183 for (tq = VLRU.prev; tq != &VLRU; tq = uq) {
3187 osi_FreeSmallSpace(tvc->mvid);
3188 tvc->mvid = (struct VenusFid *)0;
3191 aix_gnode_rele(AFSTOV(tvc));
3193 if (tvc->linkData) {
3194 afs_osi_Free(tvc->linkData, strlen(tvc->linkData) + 1);
3199 * Also free the remaining ones in the Cache
3201 for (i = 0; i < VCSIZE; i++) {
3202 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
3204 osi_FreeSmallSpace(tvc->mvid);
3205 tvc->mvid = (struct VenusFid *)0;
3209 afs_osi_Free(tvc->v.v_gnode, sizeof(struct gnode));
3210 #ifdef AFS_AIX32_ENV
3213 vms_delete(tvc->segid);
3215 tvc->segid = tvc->vmh = NULL;
3216 if (VREFCOUNT_GT(tvc,0))
3217 osi_Panic("flushVcache: vm race");
3225 #if defined(AFS_SUN5_ENV)
3231 if (tvc->linkData) {
3232 afs_osi_Free(tvc->linkData, strlen(tvc->linkData) + 1);
3237 afs_FreeAllAxs(&(tvc->Access));
3243 * Free any leftover callback queue
3245 for (i = 0; i < afs_stats_cmperf.CallBackAlloced; i++) {
3246 tsp = afs_cbrHeads[i];
3247 afs_cbrHeads[i] = 0;
3248 afs_osi_Free((char *)tsp, AFS_NCBRS * sizeof(struct afs_cbr));
3252 #if !defined(AFS_LINUX22_ENV)
3253 afs_osi_Free(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
3255 # ifdef KERNEL_HAVE_PIN
3256 unpin(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
3259 freeVCList = Initial_freeVCList = 0;
3262 AFS_RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
3263 LOCK_INIT(&afs_xvcb, "afs_xvcb");
3265 for(i = 0; i < VCSIZE; ++i)
3266 QInit(&afs_vhashTV[i]);
3270 afs_DisconGiveUpCallbacks(void) {
3275 ObtainWriteLock(&afs_xvcache, 1002); /* XXX - should be a unique number */
3277 /* Somehow, walk the set of vcaches, with each one coming out as tvc */
3278 for (i = 0; i < VCSIZE; i++) {
3279 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
3280 if (afs_QueueVCB(tvc)) {
3281 tvc->callback = NULL;
3287 ReleaseWriteLock(&afs_xvcache);
3294 * Clear the Statd flag from all vcaches
3296 * This function removes the Statd flag from all vcaches. It's used by
3297 * disconnected mode to tidy up during reconnection
3301 afs_ClearAllStatdFlag(void) {
3305 ObtainWriteLock(&afs_xvcache, 715);
3307 for (i = 0; i < VCSIZE; i++) {
3308 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
3309 tvc->f.states &= ~(CStatd|CUnique);
3312 ReleaseWriteLock(&afs_xvcache);