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
38 #include <afsconfig.h>
39 #include "../afs/param.h"
43 #include "../afs/sysincludes.h" /*Standard vendor system headers*/
44 #include "../afs/afsincludes.h" /*AFS-based standard headers*/
45 #include "../afs/afs_stats.h"
46 #include "../afs/afs_cbqueue.h"
47 #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 */
52 #if defined(AFS_OSF30_ENV)
53 extern int max_vnodes; /* number of total system vnodes */
55 extern int nvnode; /* number of total system vnodes */
58 extern int numvnodes; /* number vnodes in use now */
60 #endif /* AFS_OSF_ENV */
65 /* Imported variables */
66 extern struct server *afs_servers[NSERVERS];
67 extern afs_rwlock_t afs_xserver;
68 extern afs_rwlock_t afs_xcbhash;
69 extern struct vcache *afs_globalVp;
71 extern struct mount *afs_globalVFS;
72 extern struct vnodeops Afs_vnodeops;
73 #elif defined(AFS_DARWIN_ENV)
74 extern struct mount *afs_globalVFS;
76 extern struct vfs *afs_globalVFS;
77 #endif /* AFS_OSF_ENV */
78 #if defined(AFS_DUX40_ENV)
79 extern struct vfs_ubcops afs_ubcops;
82 extern struct vnodeops Afs_vnodeops;
86 #endif /* AFS_SGI64_ENV */
88 /* Exported variables */
89 afs_rwlock_t afs_xvcache; /*Lock: alloc new stat cache entries*/
90 afs_lock_t afs_xvcb; /*Lock: fids on which there are callbacks*/
91 struct vcache *freeVCList; /*Free list for stat cache entries*/
92 struct vcache *Initial_freeVCList; /*Initial list for above*/
93 struct afs_q VLRU; /*vcache LRU*/
94 afs_int32 vcachegen = 0;
95 unsigned int afs_paniconwarn = 0;
96 struct vcache *afs_vhashT[VCSIZE];
97 afs_int32 afs_bulkStatsLost;
98 int afs_norefpanic = 0;
100 /* Forward declarations */
101 static afs_int32 afs_QueueVCB(struct vcache *avc);
108 * Flush the given vcache entry.
111 * avc : Pointer to vcache entry to flush.
112 * slept : Pointer to int to set 1 if we sleep/drop locks, 0 if we don't.
115 * afs_xvcache lock must be held for writing upon entry to
116 * prevent people from changing the vrefCount field, and to
117 * protect the lruq and hnext fields.
118 * LOCK: afs_FlushVCache afs_xvcache W
119 * REFCNT: vcache ref count must be zero on entry except for osf1
120 * RACE: lock is dropped and reobtained, permitting race in caller
123 int afs_FlushVCache(struct vcache *avc, int *slept)
124 { /*afs_FlushVCache*/
126 register afs_int32 i, code;
127 register struct vcache **uvc, *wvc, *tvc;
130 AFS_STATCNT(afs_FlushVCache);
131 afs_Trace2(afs_iclSetp, CM_TRACE_FLUSHV, ICL_TYPE_POINTER, avc,
132 ICL_TYPE_INT32, avc->states);
135 VN_LOCK((struct vnode *)avc);
139 code = osi_VM_FlushVCache(avc, slept);
143 if (avc->states & CVFlushed) {
147 if (avc->nextfree || !avc->vlruq.prev || !avc->vlruq.next) { /* qv afs.h */
148 refpanic ("LRU vs. Free inconsistency");
150 avc->states |= CVFlushed;
151 /* pull the entry out of the lruq and put it on the free list */
152 QRemove(&avc->vlruq);
153 avc->vlruq.prev = avc->vlruq.next = (struct afs_q *) 0;
155 /* keep track of # of files that we bulk stat'd, but never used
156 * before they got recycled.
158 if (avc->states & CBulkStat)
161 /* remove entry from the hash chain */
162 i = VCHash(&avc->fid);
163 uvc = &afs_vhashT[i];
164 for(wvc = *uvc; wvc; uvc = &wvc->hnext, wvc = *uvc) {
167 avc->hnext = (struct vcache *) NULL;
171 if (!wvc) osi_Panic("flushvcache"); /* not in correct hash bucket */
172 if (avc->mvid) osi_FreeSmallSpace(avc->mvid);
173 avc->mvid = (struct VenusFid*)0;
175 afs_osi_Free(avc->linkData, strlen(avc->linkData)+1);
176 avc->linkData = NULL;
178 afs_FreeAllAxs(&(avc->Access));
180 /* we can't really give back callbacks on RO files, since the
181 * server only tracks them on a per-volume basis, and we don't
182 * know whether we still have some other files from the same
184 if ((avc->states & CRO) == 0 && avc->callback) {
187 ObtainWriteLock(&afs_xcbhash, 460);
188 afs_DequeueCallback(avc); /* remove it from queued callbacks list */
189 avc->states &= ~(CStatd | CUnique);
190 ReleaseWriteLock(&afs_xcbhash);
191 afs_symhint_inval(avc);
192 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
193 osi_dnlc_purgedp (avc); /* if it (could be) a directory */
195 osi_dnlc_purgevp (avc);
198 * Next, keep track of which vnodes we've deleted for create's
199 * optimistic synchronization algorithm
202 if (avc->fid.Fid.Vnode & 1) afs_oddZaps++;
205 #if !defined(AFS_OSF_ENV)
206 /* put the entry in the free list */
207 avc->nextfree = freeVCList;
209 if (avc->vlruq.prev || avc->vlruq.next) {
210 refpanic ("LRU vs. Free inconsistency");
213 /* This should put it back on the vnode free list since usecount is 1 */
216 if (VREFCOUNT(avc) > 0) {
217 VN_UNLOCK((struct vnode *)avc);
218 AFS_RELE((struct vnode *)avc);
220 if (afs_norefpanic) {
221 printf ("flush vc refcnt < 1");
223 (void) vgone(avc, VX_NOSLEEP, (struct vnodeops *) 0);
225 VN_UNLOCK((struct vnode *)avc);
227 else osi_Panic ("flush vc refcnt < 1");
229 #endif /* AFS_OSF_ENV */
230 avc->states |= CVFlushed;
235 VN_UNLOCK((struct vnode *)avc);
239 } /*afs_FlushVCache*/
245 * The core of the inactive vnode op for all but IRIX.
247 void afs_InactiveVCache(struct vcache *avc, struct AFS_UCRED *acred)
249 extern afs_rwlock_t afs_xdcache, afs_xvcache;
251 AFS_STATCNT(afs_inactive);
252 if (avc->states & CDirty) {
253 /* we can't keep trying to push back dirty data forever. Give up. */
254 afs_InvalidateAllSegments(avc, 1/*set lock*/); /* turns off dirty bit */
256 avc->states &= ~CMAPPED; /* mainly used by SunOS 4.0.x */
257 avc->states &= ~CDirty; /* Turn it off */
258 if (avc->states & CUnlinked) {
259 if (CheckLock(&afs_xvcache) || CheckLock(&afs_xdcache)) {
260 avc->states |= CUnlinkedDel;
263 afs_remunlink(avc, 1); /* ignore any return code */
272 * Description: allocate a callback return structure from the
273 * free list and return it.
275 * Env: The alloc and free routines are both called with the afs_xvcb lock
276 * held, so we don't have to worry about blocking in osi_Alloc.
278 static struct afs_cbr *afs_cbrSpace = 0;
279 struct afs_cbr *afs_AllocCBR() {
280 register struct afs_cbr *tsp;
283 while (!afs_cbrSpace) {
284 if (afs_stats_cmperf.CallBackAlloced >= 2) {
285 /* don't allocate more than 2 * AFS_NCBRS for now */
287 afs_stats_cmperf.CallBackFlushes++;
291 tsp = (struct afs_cbr *) afs_osi_Alloc(AFS_NCBRS * sizeof(struct afs_cbr));
292 for(i=0; i < AFS_NCBRS-1; i++) {
293 tsp[i].next = &tsp[i+1];
295 tsp[AFS_NCBRS-1].next = 0;
297 afs_stats_cmperf.CallBackAlloced++;
301 afs_cbrSpace = tsp->next;
308 * Description: free a callback return structure.
311 * asp -- the address of the structure to free.
313 * Environment: the xvcb lock is held over these calls.
316 register struct afs_cbr *asp; {
317 asp->next = afs_cbrSpace;
325 * Description: flush all queued callbacks to all servers.
329 * Environment: holds xvcb lock over RPC to guard against race conditions
330 * when a new callback is granted for the same file later on.
332 afs_int32 afs_FlushVCBs (afs_int32 lockit)
334 struct AFSFid tfids[AFS_MAXCBRSCALL];
335 struct AFSCallBack callBacks[1];
336 struct AFSCBFids fidArray;
337 struct AFSCBs cbArray;
339 struct afs_cbr *tcbrp;
343 struct vrequest treq;
345 int safety1, safety2, safety3;
346 extern int afs_totalServers;
349 if (code = afs_InitReq(&treq, &afs_osi_cred)) return code;
350 treq.flags |= O_NONBLOCK;
352 if (lockit) MObtainWriteLock(&afs_xvcb,273);
353 ObtainReadLock(&afs_xserver);
354 for(i=0; i<NSERVERS; i++) {
355 for(safety1 = 0, tsp = afs_servers[i];
356 tsp && safety1 < afs_totalServers+10; tsp=tsp->next, safety1++) {
358 if (tsp->cbrs == (struct afs_cbr *) 0) continue;
360 /* otherwise, grab a block of AFS_MAXCBRSCALL from the list
361 * and make an RPC, over and over again.
363 tcount = 0; /* number found so far */
364 for (safety2 = 0; safety2 < afs_cacheStats ; safety2++) {
365 if (tcount >= AFS_MAXCBRSCALL || !tsp->cbrs) {
366 /* if buffer is full, or we've queued all we're going
367 * to from this server, we should flush out the
370 fidArray.AFSCBFids_len = tcount;
371 fidArray.AFSCBFids_val = (struct AFSFid *) tfids;
372 cbArray.AFSCBs_len = 1;
373 cbArray.AFSCBs_val = callBacks;
374 callBacks[0].CallBackType = CB_EXCLUSIVE;
375 for (safety3 = 0; safety3 < MAXHOSTS*2; safety3++) {
376 tc = afs_ConnByHost(tsp, tsp->cell->fsport,
377 tsp->cell->cell, &treq, 0,
380 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_GIVEUPCALLBACKS);
381 #ifdef RX_ENABLE_LOCKS
383 #endif /* RX_ENABLE_LOCKS */
384 code = RXAFS_GiveUpCallBacks(tc->id, &fidArray,
386 #ifdef RX_ENABLE_LOCKS
388 #endif /* RX_ENABLE_LOCKS */
392 if (!afs_Analyze(tc, code, 0, &treq,
393 AFS_STATS_FS_RPCIDX_GIVEUPCALLBACKS,
394 SHARED_LOCK, tsp->cell)) {
398 /* ignore return code, since callbacks may have
399 * been returned anyway, we shouldn't leave them
400 * around to be returned again.
402 * Next, see if we are done with this server, and if so,
403 * break to deal with the next one.
405 if (!tsp->cbrs) break;
407 } /* if to flush full buffer */
408 /* if we make it here, we have an entry at the head of cbrs,
409 * which we should copy to the file ID array and then free.
412 tfids[tcount++] = tcbrp->fid;
413 tsp->cbrs = tcbrp->next;
415 } /* while loop for this one server */
416 if (safety2 > afs_cacheStats) {
417 afs_warn("possible internal error afs_flushVCBs (%d)\n", safety2);
419 } /* for loop for this hash chain */
420 } /* loop through all hash chains */
421 if (safety1 > afs_totalServers+2) {
422 afs_warn("AFS internal error (afs_flushVCBs) (%d > %d), continuing...\n", safety1, afs_totalServers+2);
424 osi_Panic("afs_flushVCBS safety1");
427 ReleaseReadLock(&afs_xserver);
428 if (lockit) MReleaseWriteLock(&afs_xvcb);
436 * Queue a callback on the given fid.
442 * Locks the xvcb lock.
443 * Called when the xvcache lock is already held.
446 static afs_int32 afs_QueueVCB(struct vcache *avc)
448 register struct server *tsp;
449 register struct afs_cbr *tcbp;
451 AFS_STATCNT(afs_QueueVCB);
452 /* The callback is really just a struct server ptr. */
453 tsp = (struct server *)(avc->callback);
455 /* we now have a pointer to the server, so we just allocate
456 * a queue entry and queue it.
458 MObtainWriteLock(&afs_xvcb,274);
459 tcbp = afs_AllocCBR();
460 tcbp->fid = avc->fid.Fid;
461 tcbp->next = tsp->cbrs;
464 /* now release locks and return */
465 MReleaseWriteLock(&afs_xvcb);
474 * Remove a queued callback by looking through all the servers
475 * to see if any have this callback queued.
478 * afid: The fid we want cleansed of queued callbacks.
481 * Locks xvcb and xserver locks.
482 * Typically called with xdcache, xvcache and/or individual vcache
487 register struct VenusFid *afid;
492 register struct server *tsp;
493 register struct afs_cbr *tcbrp;
494 struct afs_cbr **lcbrpp;
496 AFS_STATCNT(afs_RemoveVCB);
497 MObtainWriteLock(&afs_xvcb,275);
498 ObtainReadLock(&afs_xserver);
499 for(i=0;i<NSERVERS;i++) {
500 for(tsp=afs_servers[i]; tsp; tsp=tsp->next) {
501 /* if cell is known, and is wrong, then skip this server */
502 if (tsp->cell && tsp->cell->cell != afid->Cell) continue;
505 * Otherwise, iterate through file IDs we're sending to the
508 lcbrpp = &tsp->cbrs; /* first queued return callback */
509 for(tcbrp = *lcbrpp; tcbrp; lcbrpp = &tcbrp->next, tcbrp = *lcbrpp) {
510 if (afid->Fid.Volume == tcbrp->fid.Volume &&
511 afid->Fid.Unique == tcbrp->fid.Unique &&
512 afid->Fid.Vnode == tcbrp->fid.Vnode) {
513 *lcbrpp = tcbrp->next; /* unthread from list */
521 ReleaseReadLock(&afs_xserver);
522 MReleaseWriteLock(&afs_xvcb);
533 * This routine is responsible for allocating a new cache entry
534 * from the free list. It formats the cache entry and inserts it
535 * into the appropriate hash tables. It must be called with
536 * afs_xvcache write-locked so as to prevent several processes from
537 * trying to create a new cache entry simultaneously.
540 * afid : The file id of the file whose cache entry is being
543 /* LOCK: afs_NewVCache afs_xvcache W */
544 struct vcache *afs_NewVCache(struct VenusFid *afid, struct server *serverp,
545 afs_int32 lockit, afs_int32 locktype)
549 afs_int32 anumber = VCACHE_FREE;
551 struct gnode *gnodepnt;
554 struct vm_info * vm_info_ptr;
555 #endif /* AFS_MACH_ENV */
558 #endif /* AFS_OSF_ENV */
559 struct afs_q *tq, *uq;
562 AFS_STATCNT(afs_NewVCache);
563 #ifdef AFS_LINUX22_ENV
565 /* Free some if possible. */
566 struct afs_q *tq, *uq;
567 int i; char *panicstr;
568 int vmax = 2 * afs_cacheStats;
569 int vn = VCACHE_FREE;
572 shrink_dcache_sb(afs_globalVFS);
576 for(tq = VLRU.prev; tq != &VLRU && vn > 0; tq = uq) {
579 if (tvc->states & CVFlushed)
580 refpanic ("CVFlushed on VLRU");
582 refpanic ("Exceeded pool of AFS vnodes(VLRU cycle?)");
583 else if (QNext(uq) != tq)
584 refpanic ("VLRU inconsistent");
586 if (tvc == afs_globalVp)
589 if ( VREFCOUNT(tvc) && tvc->opens == 0 ) {
590 struct inode *ip = (struct inode*)tvc;
591 if (list_empty(&ip->i_dentry)) {
595 struct list_head *cur;
596 struct list_head *head = &ip->i_dentry;
599 #if defined(AFS_LINUX24_ENV)
600 spin_lock(&dcache_lock);
603 while ((cur = cur->next) != head) {
604 struct dentry *dentry = list_entry(cur, struct dentry, d_alias);
605 #if defined(AFS_LINUX24_ENV)
606 if (!atomic_read(&dentry->d_count)) {
608 if (!dentry->d_count) {
611 #if defined(AFS_LINUX24_ENV)
613 spin_unlock(&dcache_lock);
626 #if defined(AFS_LINUX24_ENV)
627 spin_unlock(&dcache_lock);
635 #endif /* AFS_LINUX22_ENV */
638 if (afs_vcount >= afs_maxvcount)
641 * If we are using > 33 % of the total system vnodes for AFS vcache
642 * entries or we are using the maximum number of vcache entries,
643 * then free some. (if our usage is > 33% we should free some, if
644 * our usage is > afs_maxvcount, set elsewhere to 0.5*nvnode,
645 * we _must_ free some -- no choice).
647 if ( (( 3 * afs_vcount ) > nvnode) || ( afs_vcount >= afs_maxvcount ))
650 struct afs_q *tq, *uq;
651 int i; char *panicstr;
654 for(tq = VLRU.prev; tq != &VLRU && anumber > 0; tq = uq) {
657 if (tvc->states & CVFlushed)
658 refpanic ("CVFlushed on VLRU");
659 else if (i++ > afs_maxvcount)
660 refpanic ("Exceeded pool of AFS vnodes(VLRU cycle?)");
661 else if (QNext(uq) != tq)
662 refpanic ("VLRU inconsistent");
663 else if (VREFCOUNT(tvc) < 1)
664 refpanic ("refcnt 0 on VLRU");
666 if ( VREFCOUNT(tvc) == 1 && tvc->opens == 0
667 && (tvc->states & CUnlinkedDel) == 0) {
668 code = afs_FlushVCache(tvc, &fv_slept);
675 continue; /* start over - may have raced. */
680 if (anumber == VCACHE_FREE) {
681 printf("NewVCache: warning none freed, using %d of %d\n",
682 afs_vcount, afs_maxvcount);
683 if (afs_vcount >= afs_maxvcount) {
684 osi_Panic("NewVCache - none freed");
685 /* XXX instead of panicing, should do afs_maxvcount++
686 and magic up another one */
692 if (getnewvnode(MOUNT_AFS, &Afs_vnodeops, &nvc)) {
693 /* What should we do ???? */
694 osi_Panic("afs_NewVCache: no more vnodes");
699 tvc->nextfree = (struct vcache *)0;
701 #else /* AFS_OSF_ENV */
702 /* pull out a free cache entry */
705 for(tq = VLRU.prev; (anumber > 0) && (tq != &VLRU); tq = uq) {
709 if (tvc->states & CVFlushed)
710 refpanic("CVFlushed on VLRU");
711 else if (i++ > 2*afs_cacheStats) /* even allowing for a few xallocs...*/
712 refpanic("Increase -stat parameter of afsd(VLRU cycle?)");
713 else if (QNext(uq) != tq)
714 refpanic("VLRU inconsistent");
716 #ifdef AFS_DARWIN_ENV
717 if (tvc->opens == 0 && ((tvc->states & CUnlinkedDel) == 0) &&
718 VREFCOUNT(tvc) == 1 && UBCINFOEXISTS(&tvc->v)) {
719 osi_VM_TryReclaim(tvc, &fv_slept);
723 continue; /* start over - may have raced. */
727 if (VREFCOUNT(tvc) == 0 && tvc->opens == 0
728 && (tvc->states & CUnlinkedDel) == 0) {
729 code = afs_FlushVCache(tvc, &fv_slept);
736 continue; /* start over - may have raced. */
739 if (tq == uq ) break;
743 /* none free, making one is better than a panic */
744 afs_stats_cmperf.vcacheXAllocs++; /* count in case we have a leak */
745 tvc = (struct vcache *) afs_osi_Alloc(sizeof (struct vcache));
747 pin((char *)tvc, sizeof(struct vcache)); /* XXX */
750 /* In case it still comes here we need to fill this */
751 tvc->v.v_vm_info = VM_INFO_NULL;
752 vm_info_init(tvc->v.v_vm_info);
753 /* perhaps we should also do close_flush on non-NeXT mach systems;
754 * who knows; we don't currently have the sources.
756 #endif /* AFS_MACH_ENV */
757 #if defined(AFS_SGI_ENV)
758 { char name[METER_NAMSZ];
759 memset(tvc, 0, sizeof(struct vcache));
760 tvc->v.v_number = ++afsvnumbers;
761 tvc->vc_rwlockid = OSI_NO_LOCKID;
762 initnsema(&tvc->vc_rwlock, 1, makesname(name, "vrw", tvc->v.v_number));
763 #ifndef AFS_SGI53_ENV
764 initnsema(&tvc->v.v_sync, 0, makesname(name, "vsy", tvc->v.v_number));
766 #ifndef AFS_SGI62_ENV
767 initnlock(&tvc->v.v_lock, makesname(name, "vlk", tvc->v.v_number));
770 #endif /* AFS_SGI_ENV */
773 tvc = freeVCList; /* take from free list */
774 freeVCList = tvc->nextfree;
775 tvc->nextfree = (struct vcache *)0;
777 #endif /* AFS_OSF_ENV */
780 vm_info_ptr = tvc->v.v_vm_info;
781 #endif /* AFS_MACH_ENV */
783 #if !defined(AFS_SGI_ENV) && !defined(AFS_OSF_ENV)
784 memset((char *)tvc, 0, sizeof(struct vcache));
789 RWLOCK_INIT(&tvc->lock, "vcache lock");
790 #if defined(AFS_SUN5_ENV)
791 RWLOCK_INIT(&tvc->vlock, "vcache vlock");
792 #endif /* defined(AFS_SUN5_ENV) */
795 tvc->v.v_vm_info = vm_info_ptr;
796 tvc->v.v_vm_info->pager = MEMORY_OBJECT_NULL;
797 #endif /* AFS_MACH_ENV */
798 tvc->parentVnode = 0;
799 tvc->mvid = (struct VenusFid *) 0;
800 tvc->linkData = (char *) 0;
803 tvc->execsOrWriters = 0;
807 tvc->last_looker = 0;
809 tvc->asynchrony = -1;
811 afs_symhint_inval(tvc);
813 tvc->flushDV.low = tvc->flushDV.high = AFS_MAXDV;
816 tvc->truncPos = AFS_NOTRUNC; /* don't truncate until we need to */
817 hzero(tvc->m.DataVersion); /* in case we copy it into flushDV */
819 /* Hold it for the LRU (should make count 2) */
820 VN_HOLD((struct vnode *)tvc);
821 #else /* AFS_OSF_ENV */
822 VREFCOUNT_SET(tvc, 1); /* us */
823 #endif /* AFS_OSF_ENV */
825 LOCK_INIT(&tvc->pvmlock, "vcache pvmlock");
826 tvc->vmh = tvc->segid = NULL;
829 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
830 #if defined(AFS_SUN5_ENV)
831 rw_init(&tvc->rwlock, "vcache rwlock", RW_DEFAULT, NULL);
833 #if defined(AFS_SUN55_ENV)
834 /* This is required if the kaio (kernel aynchronous io)
835 ** module is installed. Inside the kernel, the function
836 ** check_vp( common/os/aio.c) checks to see if the kernel has
837 ** to provide asynchronous io for this vnode. This
838 ** function extracts the device number by following the
839 ** v_data field of the vnode. If we do not set this field
840 ** then the system panics. The value of the v_data field
841 ** is not really important for AFS vnodes because the kernel
842 ** does not do asynchronous io for regular files. Hence,
843 ** for the time being, we fill up the v_data field with the
844 ** vnode pointer itself. */
845 tvc->v.v_data = (char *)tvc;
846 #endif /* AFS_SUN55_ENV */
848 afs_BozonInit(&tvc->pvnLock, tvc);
852 tvc->callback = serverp; /* to minimize chance that clear
854 /* initialize vnode data, note vrefCount is v.v_count */
856 /* Don't forget to free the gnode space */
857 tvc->v.v_gnode = gnodepnt = (struct gnode *) osi_AllocSmallSpace(sizeof(struct gnode));
858 memset((char *)gnodepnt, 0, sizeof(struct gnode));
861 memset((void*)&(tvc->vc_bhv_desc), 0, sizeof(tvc->vc_bhv_desc));
862 bhv_desc_init(&(tvc->vc_bhv_desc), tvc, tvc, &Afs_vnodeops);
864 vn_bhv_head_init(&(tvc->v.v_bh), "afsvp");
865 vn_bhv_insert_initial(&(tvc->v.v_bh), &(tvc->vc_bhv_desc));
867 bhv_head_init(&(tvc->v.v_bh));
868 bhv_insert_initial(&(tvc->v.v_bh), &(tvc->vc_bhv_desc));
871 tvc->v.v_mreg = tvc->v.v_mregb = (struct pregion*)tvc;
873 tvc->v.v_trace = ktrace_alloc(VNODE_TRACE_SIZE, 0);
875 init_bitlock(&tvc->v.v_pcacheflag, VNODE_PCACHE_LOCKBIT, "afs_pcache",
877 init_mutex(&tvc->v.v_filocksem, MUTEX_DEFAULT, "afsvfl", (long)tvc);
878 init_mutex(&tvc->v.v_buf_lock, MUTEX_DEFAULT, "afsvnbuf", (long)tvc);
880 vnode_pcache_init(&tvc->v);
881 #if defined(DEBUG) && defined(VNODE_INIT_BITLOCK)
882 /* Above define is never true execpt in SGI test kernels. */
883 init_bitlock(&(tvc->v.v_flag, VLOCK, "vnode", tvc->v.v_number);
886 AFS_VN_INIT_BUF_LOCK(&(tvc->v));
889 SetAfsVnode((struct vnode *)tvc);
890 #endif /* AFS_SGI64_ENV */
891 #ifdef AFS_DARWIN_ENV
892 tvc->v.v_ubcinfo = UBC_INFO_NULL;
893 lockinit(&tvc->rwlock, PINOD, "vcache rwlock", 0, 0);
894 cache_purge((struct vnode *)tvc);
897 /* VLISTNONE(&tvc->v); */
898 tvc->v.v_freelist.tqe_next=0;
899 tvc->v.v_freelist.tqe_prev=(struct vnode **)0xdeadb;
900 /*tvc->vrefCount++;*/
903 * The proper value for mvstat (for root fids) is setup by the caller.
906 if (afid->Fid.Vnode == 1 && afid->Fid.Unique == 1)
908 if (afs_globalVFS == 0) osi_Panic("afs globalvfs");
909 vSetVfsp(tvc, afs_globalVFS);
912 tvc->v.v_vfsnext = afs_globalVFS->vfs_vnodes; /* link off vfs */
913 tvc->v.v_vfsprev = NULL;
914 afs_globalVFS->vfs_vnodes = &tvc->v;
915 if (tvc->v.v_vfsnext != NULL)
916 tvc->v.v_vfsnext->v_vfsprev = &tvc->v;
917 tvc->v.v_next = gnodepnt->gn_vnode; /*Single vnode per gnode for us!*/
918 gnodepnt->gn_vnode = &tvc->v;
921 tvc->v.g_dev = ((struct mount *)afs_globalVFS->vfs_data)->m_dev;
923 #if defined(AFS_DUX40_ENV)
924 insmntque(tvc, afs_globalVFS, &afs_ubcops);
927 /* Is this needed??? */
928 insmntque(tvc, afs_globalVFS);
929 #endif /* AFS_OSF_ENV */
930 #endif /* AFS_DUX40_ENV */
931 #if defined(AFS_SGI_ENV)
932 VN_SET_DPAGES(&(tvc->v), (struct pfdat*)NULL);
933 osi_Assert((tvc->v.v_flag & VINACT) == 0);
935 osi_Assert(VN_GET_PGCNT(&(tvc->v)) == 0);
936 osi_Assert(tvc->mapcnt == 0 && tvc->vc_locktrips == 0);
937 osi_Assert(tvc->vc_rwlockid == OSI_NO_LOCKID);
938 osi_Assert(tvc->v.v_filocks == NULL);
939 #if !defined(AFS_SGI65_ENV)
940 osi_Assert(tvc->v.v_filocksem == NULL);
942 osi_Assert(tvc->cred == NULL);
944 vnode_pcache_reinit(&tvc->v);
945 tvc->v.v_rdev = NODEV;
947 vn_initlist((struct vnlist *)&tvc->v);
949 #endif /* AFS_SGI_ENV */
950 #if defined(AFS_LINUX22_ENV)
952 struct inode *ip = (struct inode*)tvc;
953 sema_init(&ip->i_sem, 1);
954 #if defined(AFS_LINUX24_ENV)
955 sema_init(&ip->i_zombie, 1);
956 init_waitqueue_head(&ip->i_wait);
957 spin_lock_init(&ip->i_data.i_shared_lock);
958 #ifdef STRUCT_ADDRESS_SPACE_HAS_PAGE_LOCK
959 spin_lock_init(&ip->i_data.page_lock);
961 INIT_LIST_HEAD(&ip->i_data.clean_pages);
962 INIT_LIST_HEAD(&ip->i_data.dirty_pages);
963 INIT_LIST_HEAD(&ip->i_data.locked_pages);
964 INIT_LIST_HEAD(&ip->i_dirty_buffers);
965 ip->i_data.host = (void*) ip;
966 ip->i_mapping = &ip->i_data;
967 #ifdef STRUCT_INODE_HAS_I_TRUNCATE_SEM
968 init_rwsem(&ip->i_truncate_sem);
971 sema_init(&ip->i_atomic_write, 1);
972 init_waitqueue(&ip->i_wait);
974 INIT_LIST_HEAD(&ip->i_hash);
975 INIT_LIST_HEAD(&ip->i_dentry);
977 ip->i_dev = afs_globalVFS->s_dev;
978 ip->i_sb = afs_globalVFS;
983 osi_dnlc_purgedp(tvc); /* this may be overkill */
984 memset((char *)&(tvc->quick), 0, sizeof(struct vtodc));
985 memset((char *)&(tvc->callsort), 0, sizeof(struct afs_q));
986 tvc->slocks = (struct SimpleLocks *)0;
989 tvc->hnext = afs_vhashT[i];
991 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
992 refpanic ("NewVCache VLRU inconsistent");
994 QAdd(&VLRU, &tvc->vlruq); /* put in lruq */
995 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
996 refpanic ("NewVCache VLRU inconsistent2");
998 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
999 refpanic ("NewVCache VLRU inconsistent3");
1001 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
1002 refpanic ("NewVCache VLRU inconsistent4");
1012 * afs_FlushActiveVcaches
1018 * doflocks : Do we handle flocks?
1020 /* LOCK: afs_FlushActiveVcaches afs_xvcache N */
1022 afs_FlushActiveVcaches(doflocks)
1023 register afs_int32 doflocks;
1025 { /*afs_FlushActiveVcaches*/
1027 register struct vcache *tvc;
1029 register struct conn *tc;
1030 register afs_int32 code;
1031 register struct AFS_UCRED *cred;
1032 struct vrequest treq, ureq;
1033 struct AFSVolSync tsync;
1037 AFS_STATCNT(afs_FlushActiveVcaches);
1038 ObtainReadLock(&afs_xvcache);
1039 for(i=0;i<VCSIZE;i++) {
1040 for(tvc = afs_vhashT[i]; tvc; tvc=tvc->hnext) {
1041 if (doflocks && tvc->flockCount != 0) {
1042 /* if this entry has an flock, send a keep-alive call out */
1044 ReleaseReadLock(&afs_xvcache);
1045 ObtainWriteLock(&tvc->lock,51);
1047 afs_InitReq(&treq, &afs_osi_cred);
1048 treq.flags |= O_NONBLOCK;
1050 tc = afs_Conn(&tvc->fid, &treq, SHARED_LOCK);
1052 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_EXTENDLOCK);
1053 #ifdef RX_ENABLE_LOCKS
1055 #endif /* RX_ENABLE_LOCKS */
1057 RXAFS_ExtendLock(tc->id,
1058 (struct AFSFid *) &tvc->fid.Fid,
1060 #ifdef RX_ENABLE_LOCKS
1062 #endif /* RX_ENABLE_LOCKS */
1067 (afs_Analyze(tc, code, &tvc->fid, &treq,
1068 AFS_STATS_FS_RPCIDX_EXTENDLOCK,
1069 SHARED_LOCK, (struct cell *)0));
1071 ReleaseWriteLock(&tvc->lock);
1072 ObtainReadLock(&afs_xvcache);
1076 if ((tvc->states & CCore) || (tvc->states & CUnlinkedDel)) {
1078 * Don't let it evaporate in case someone else is in
1079 * this code. Also, drop the afs_xvcache lock while
1080 * getting vcache locks.
1083 ReleaseReadLock(&afs_xvcache);
1084 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1085 afs_BozonLock(&tvc->pvnLock, tvc);
1087 #if defined(AFS_SGI_ENV)
1089 * That's because if we come in via the CUnlinkedDel bit state path we'll be have 0 refcnt
1091 osi_Assert(VREFCOUNT(tvc) > 0);
1092 AFS_RWLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1094 ObtainWriteLock(&tvc->lock,52);
1095 if (tvc->states & CCore) {
1096 tvc->states &= ~CCore;
1097 /* XXXX Find better place-holder for cred XXXX */
1098 cred = (struct AFS_UCRED *) tvc->linkData;
1099 tvc->linkData = (char *) 0; /* XXX */
1100 afs_InitReq(&ureq, cred);
1101 afs_Trace2(afs_iclSetp, CM_TRACE_ACTCCORE,
1102 ICL_TYPE_POINTER, tvc,
1103 ICL_TYPE_INT32, tvc->execsOrWriters);
1104 code = afs_StoreOnLastReference(tvc, &ureq);
1105 ReleaseWriteLock(&tvc->lock);
1106 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1107 afs_BozonUnlock(&tvc->pvnLock, tvc);
1109 hzero(tvc->flushDV);
1112 if (code && code != VNOVNODE) {
1113 afs_StoreWarn(code, tvc->fid.Fid.Volume,
1114 /* /dev/console */ 1);
1116 } else if (tvc->states & CUnlinkedDel) {
1120 ReleaseWriteLock(&tvc->lock);
1121 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1122 afs_BozonUnlock(&tvc->pvnLock, tvc);
1124 #if defined(AFS_SGI_ENV)
1125 AFS_RWUNLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1127 afs_remunlink(tvc, 0);
1128 #if defined(AFS_SGI_ENV)
1129 AFS_RWLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1133 /* lost (or won, perhaps) the race condition */
1134 ReleaseWriteLock(&tvc->lock);
1135 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1136 afs_BozonUnlock(&tvc->pvnLock, tvc);
1139 #if defined(AFS_SGI_ENV)
1140 AFS_RWUNLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1142 ObtainReadLock(&afs_xvcache);
1148 AFS_RELE((struct vnode *)tvc);
1150 /* Matches write code setting CCore flag */
1154 #ifdef AFS_DARWIN_ENV
1155 if (VREFCOUNT(tvc) == 1 && UBCINFOEXISTS(&tvc->v)) {
1156 if (tvc->opens) panic("flushactive open, hasubc, but refcnt 1");
1157 osi_VM_TryReclaim(tvc,0);
1162 ReleaseReadLock(&afs_xvcache);
1164 } /*afs_FlushActiveVcaches*/
1171 * Make sure a cache entry is up-to-date status-wise.
1173 * NOTE: everywhere that calls this can potentially be sped up
1174 * by checking CStatd first, and avoiding doing the InitReq
1175 * if this is up-to-date.
1177 * Anymore, the only places that call this KNOW already that the
1178 * vcache is not up-to-date, so we don't screw around.
1181 * avc : Ptr to vcache entry to verify.
1185 int afs_VerifyVCache2(struct vcache *avc, struct vrequest *areq)
1187 register struct vcache *tvc;
1189 AFS_STATCNT(afs_VerifyVCache);
1191 #if defined(AFS_OSF_ENV)
1192 ObtainReadLock(&avc->lock);
1193 if (afs_IsWired(avc)) {
1194 ReleaseReadLock(&avc->lock);
1197 ReleaseReadLock(&avc->lock);
1198 #endif /* AFS_OSF_ENV */
1199 /* otherwise we must fetch the status info */
1201 ObtainWriteLock(&avc->lock,53);
1202 if (avc->states & CStatd) {
1203 ReleaseWriteLock(&avc->lock);
1206 ObtainWriteLock(&afs_xcbhash, 461);
1207 avc->states &= ~( CStatd | CUnique );
1208 avc->callback = (struct server *)0;
1209 afs_DequeueCallback(avc);
1210 ReleaseWriteLock(&afs_xcbhash);
1211 ReleaseWriteLock(&avc->lock);
1213 /* since we've been called back, or the callback has expired,
1214 * it's possible that the contents of this directory, or this
1215 * file's name have changed, thus invalidating the dnlc contents.
1217 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
1218 osi_dnlc_purgedp (avc);
1220 osi_dnlc_purgevp (avc);
1222 /* fetch the status info */
1223 tvc = afs_GetVCache(&avc->fid, areq, (afs_int32*)0, avc, READ_LOCK);
1224 if (!tvc) return ENOENT;
1225 /* Put it back; caller has already incremented vrefCount */
1226 afs_PutVCache(tvc, READ_LOCK);
1229 } /*afs_VerifyVCache*/
1236 * Simple copy of stat info into cache.
1239 * avc : Ptr to vcache entry involved.
1240 * astat : Ptr to stat info to copy.
1243 * Nothing interesting.
1245 * Callers: as of 1992-04-29, only called by WriteVCache
1248 afs_SimpleVStat(avc, astat, areq)
1249 register struct vcache *avc;
1250 register struct AFSFetchStatus *astat;
1251 struct vrequest *areq;
1252 { /*afs_SimpleVStat*/
1255 AFS_STATCNT(afs_SimpleVStat);
1258 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1259 && !AFS_VN_MAPPED((vnode_t*)avc))
1261 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc))
1265 #ifdef AFS_64BIT_ClIENT
1266 FillInt64(length, astat->Length_hi, astat->Length);
1267 #else /* AFS_64BIT_CLIENT */
1268 length = astat->Length;
1269 #endif /* AFS_64BIT_CLIENT */
1270 #if defined(AFS_SGI_ENV)
1271 osi_Assert((valusema(&avc->vc_rwlock) <= 0) &&
1272 (OSI_GET_LOCKID() == avc->vc_rwlockid));
1273 if (length < avc->m.Length) {
1274 vnode_t *vp = (vnode_t *)avc;
1276 osi_Assert(WriteLocked(&avc->lock));
1277 ReleaseWriteLock(&avc->lock);
1279 PTOSSVP(vp, (off_t)length, (off_t)MAXLONG);
1281 ObtainWriteLock(&avc->lock,67);
1284 /* if writing the file, don't fetch over this value */
1285 afs_Trace3(afs_iclSetp, CM_TRACE_SIMPLEVSTAT,
1286 ICL_TYPE_POINTER, avc,
1287 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length),
1288 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1289 avc->m.Length = length;
1290 avc->m.Date = astat->ClientModTime;
1292 avc->m.Owner = astat->Owner;
1293 avc->m.Group = astat->Group;
1294 avc->m.Mode = astat->UnixModeBits;
1295 if (vType(avc) == VREG) {
1296 avc->m.Mode |= S_IFREG;
1298 else if (vType(avc) == VDIR) {
1299 avc->m.Mode |= S_IFDIR;
1301 else if (vType(avc) == VLNK) {
1305 avc->m.Mode |= S_IFLNK;
1306 if ((avc->m.Mode & 0111) == 0) avc->mvstat = 1;
1308 if (avc->states & CForeign) {
1309 struct axscache *ac;
1310 avc->anyAccess = astat->AnonymousAccess;
1312 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1314 * Caller has at least one bit not covered by anonymous, and
1315 * thus may have interesting rights.
1317 * HOWEVER, this is a really bad idea, because any access query
1318 * for bits which aren't covered by anonymous, on behalf of a user
1319 * who doesn't have any special rights, will result in an answer of
1320 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1321 * It's an especially bad idea under Ultrix, since (due to the lack of
1322 * a proper access() call) it must perform several afs_access() calls
1323 * in order to create magic mode bits that vary according to who makes
1324 * the call. In other words, _every_ stat() generates a test for
1327 #endif /* badidea */
1328 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1329 ac->axess = astat->CallerAccess;
1330 else /* not found, add a new one if possible */
1331 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1335 } /*afs_SimpleVStat*/
1342 * Store the status info *only* back to the server for a
1346 * avc : Ptr to the vcache entry.
1347 * astatus : Ptr to the status info to store.
1348 * areq : Ptr to the associated vrequest.
1351 * Must be called with a shared lock held on the vnode.
1354 afs_WriteVCache(avc, astatus, areq)
1355 register struct vcache *avc;
1356 register struct AFSStoreStatus *astatus;
1357 struct vrequest *areq;
1359 { /*afs_WriteVCache*/
1362 struct AFSFetchStatus OutStatus;
1363 struct AFSVolSync tsync;
1366 AFS_STATCNT(afs_WriteVCache);
1367 afs_Trace2(afs_iclSetp, CM_TRACE_WVCACHE, ICL_TYPE_POINTER, avc,
1368 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
1371 tc = afs_Conn(&avc->fid, areq, SHARED_LOCK);
1373 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STORESTATUS);
1374 #ifdef RX_ENABLE_LOCKS
1376 #endif /* RX_ENABLE_LOCKS */
1377 code = RXAFS_StoreStatus(tc->id,
1378 (struct AFSFid *) &avc->fid.Fid,
1379 astatus, &OutStatus, &tsync);
1380 #ifdef RX_ENABLE_LOCKS
1382 #endif /* RX_ENABLE_LOCKS */
1387 (afs_Analyze(tc, code, &avc->fid, areq,
1388 AFS_STATS_FS_RPCIDX_STORESTATUS,
1389 SHARED_LOCK, (struct cell *)0));
1391 UpgradeSToWLock(&avc->lock,20);
1393 /* success, do the changes locally */
1394 afs_SimpleVStat(avc, &OutStatus, areq);
1396 * Update the date, too. SimpleVStat didn't do this, since
1397 * it thought we were doing this after fetching new status
1398 * over a file being written.
1400 avc->m.Date = OutStatus.ClientModTime;
1403 /* failure, set up to check with server next time */
1404 ObtainWriteLock(&afs_xcbhash, 462);
1405 afs_DequeueCallback(avc);
1406 avc->states &= ~( CStatd | CUnique); /* turn off stat valid flag */
1407 ReleaseWriteLock(&afs_xcbhash);
1408 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
1409 osi_dnlc_purgedp (avc); /* if it (could be) a directory */
1411 ConvertWToSLock(&avc->lock);
1414 } /*afs_WriteVCache*/
1420 * Copy astat block into vcache info
1423 * avc : Ptr to vcache entry.
1424 * astat : Ptr to stat block to copy in.
1425 * areq : Ptr to associated request.
1428 * Must be called under a write lock
1430 * Note: this code may get dataversion and length out of sync if the file has
1431 * been modified. This is less than ideal. I haven't thought about
1432 * it sufficiently to be certain that it is adequate.
1435 afs_ProcessFS(avc, astat, areq)
1436 register struct vcache *avc;
1437 struct vrequest *areq;
1438 register struct AFSFetchStatus *astat;
1444 AFS_STATCNT(afs_ProcessFS);
1446 #ifdef AFS_64BIT_CLIENT
1447 FillInt64(length, astat->Length_hi, astat->Length);
1448 #else /* AFS_64BIT_CLIENT */
1449 length = astat->Length;
1450 #endif /* AFS_64BIT_CLIENT */
1451 /* WARNING: afs_DoBulkStat uses the Length field to store a sequence
1452 * number for each bulk status request. Under no circumstances
1453 * should afs_DoBulkStat store a sequence number if the new
1454 * length will be ignored when afs_ProcessFS is called with
1455 * new stats. If you change the following conditional then you
1456 * also need to change the conditional in afs_DoBulkStat. */
1458 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1459 && !AFS_VN_MAPPED((vnode_t*)avc))
1461 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc))
1464 /* if we're writing or mapping this file, don't fetch over these
1467 afs_Trace3(afs_iclSetp, CM_TRACE_PROCESSFS, ICL_TYPE_POINTER, avc,
1468 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length),
1469 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1470 avc->m.Length = length;
1471 avc->m.Date = astat->ClientModTime;
1473 hset64(avc->m.DataVersion, astat->dataVersionHigh, astat->DataVersion);
1474 avc->m.Owner = astat->Owner;
1475 avc->m.Mode = astat->UnixModeBits;
1476 avc->m.Group = astat->Group;
1477 avc->m.LinkCount = astat->LinkCount;
1478 if (astat->FileType == File) {
1479 vSetType(avc, VREG);
1480 avc->m.Mode |= S_IFREG;
1482 else if (astat->FileType == Directory) {
1483 vSetType(avc, VDIR);
1484 avc->m.Mode |= S_IFDIR;
1486 else if (astat->FileType == SymbolicLink) {
1487 vSetType(avc, VLNK);
1488 avc->m.Mode |= S_IFLNK;
1489 if ((avc->m.Mode & 0111) == 0) avc->mvstat = 1;
1491 avc->anyAccess = astat->AnonymousAccess;
1493 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1495 * Caller has at least one bit not covered by anonymous, and
1496 * thus may have interesting rights.
1498 * HOWEVER, this is a really bad idea, because any access query
1499 * for bits which aren't covered by anonymous, on behalf of a user
1500 * who doesn't have any special rights, will result in an answer of
1501 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1502 * It's an especially bad idea under Ultrix, since (due to the lack of
1503 * a proper access() call) it must perform several afs_access() calls
1504 * in order to create magic mode bits that vary according to who makes
1505 * the call. In other words, _every_ stat() generates a test for
1508 #endif /* badidea */
1510 struct axscache *ac;
1511 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1512 ac->axess = astat->CallerAccess;
1513 else /* not found, add a new one if possible */
1514 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1517 #ifdef AFS_LINUX22_ENV
1518 vcache2inode(avc); /* Set the inode attr cache */
1524 afs_RemoteLookup(afid, areq, name, nfid, OutStatusp, CallBackp, serverp, tsyncp)
1525 register struct VenusFid *afid;
1526 struct vrequest *areq;
1528 struct VenusFid *nfid;
1529 struct AFSFetchStatus *OutStatusp;
1530 struct AFSCallBack *CallBackp;
1531 struct server **serverp;
1532 struct AFSVolSync *tsyncp;
1535 register struct vcache *tvc;
1538 register struct conn *tc;
1539 struct AFSFetchStatus OutDirStatus;
1542 if (!name) name = ""; /* XXX */
1544 tc = afs_Conn(afid, areq, SHARED_LOCK);
1546 if (serverp) *serverp = tc->srvr->server;
1548 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_XLOOKUP);
1549 #ifdef RX_ENABLE_LOCKS
1551 #endif /* RX_ENABLE_LOCKS */
1552 code = RXAFS_Lookup(tc->id, (struct AFSFid *) &afid->Fid, name,
1553 (struct AFSFid *) &nfid->Fid,
1554 OutStatusp, &OutDirStatus, CallBackp, tsyncp);
1555 #ifdef RX_ENABLE_LOCKS
1557 #endif /* RX_ENABLE_LOCKS */
1562 (afs_Analyze(tc, code, afid, areq,
1563 AFS_STATS_FS_RPCIDX_XLOOKUP,
1564 SHARED_LOCK, (struct cell *)0));
1574 * Given a file id and a vrequest structure, fetch the status
1575 * information associated with the file.
1579 * areq : Ptr to associated vrequest structure, specifying the
1580 * user whose authentication tokens will be used.
1581 * avc : caller may already have a vcache for this file, which is
1585 * The cache entry is returned with an increased vrefCount field.
1586 * The entry must be discarded by calling afs_PutVCache when you
1587 * are through using the pointer to the cache entry.
1589 * You should not hold any locks when calling this function, except
1590 * locks on other vcache entries. If you lock more than one vcache
1591 * entry simultaneously, you should lock them in this order:
1593 * 1. Lock all files first, then directories.
1594 * 2. Within a particular type, lock entries in Fid.Vnode order.
1596 * This locking hierarchy is convenient because it allows locking
1597 * of a parent dir cache entry, given a file (to check its access
1598 * control list). It also allows renames to be handled easily by
1599 * locking directories in a constant order.
1600 * NB. NewVCache -> FlushVCache presently (4/10/95) drops the xvcache lock.
1602 struct vcache *afs_GetVCache(afid, areq, cached, avc, locktype)
1603 register struct VenusFid *afid;
1604 struct vrequest *areq;
1607 struct vcache *avc; /* might have a vcache structure already, which must
1608 * already be held by the caller */
1611 afs_int32 code, i, newvcache=0;
1612 register struct vcache *tvc;
1616 AFS_STATCNT(afs_GetVCache);
1618 if (cached) *cached = 0; /* Init just in case */
1621 ObtainSharedLock(&afs_xvcache,5);
1623 tvc = afs_FindVCache(afid, 0, 0, &retry, DO_STATS | DO_VLRU );
1625 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1626 ReleaseSharedLock(&afs_xvcache);
1627 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1635 if (tvc->states & CStatd) {
1636 ReleaseSharedLock(&afs_xvcache);
1641 UpgradeSToWLock(&afs_xvcache,21);
1643 /* no cache entry, better grab one */
1644 tvc = afs_NewVCache(afid, (struct server *)0, 1, WRITE_LOCK);
1647 ConvertWToSLock(&afs_xvcache);
1648 afs_stats_cmperf.vcacheMisses++;
1651 ReleaseSharedLock(&afs_xvcache);
1653 ObtainWriteLock(&tvc->lock,54);
1655 if (tvc->states & CStatd) {
1656 #ifdef AFS_LINUX22_ENV
1659 ReleaseWriteLock(&tvc->lock);
1660 #ifdef AFS_DARWIN_ENV
1666 #if defined(AFS_OSF_ENV)
1667 if (afs_IsWired(tvc)) {
1668 ReleaseWriteLock(&tvc->lock);
1671 #endif /* AFS_OSF_ENV */
1673 ObtainWriteLock(&afs_xcbhash, 464);
1674 tvc->states &= ~CUnique;
1676 afs_DequeueCallback(tvc);
1677 ReleaseWriteLock(&afs_xcbhash);
1679 /* It is always appropriate to throw away all the access rights? */
1680 afs_FreeAllAxs(&(tvc->Access));
1681 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-volume info */
1683 if ((tvp->states & VForeign)) {
1684 if (newvcache) tvc->states |= CForeign;
1685 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
1686 && (tvp->rootUnique == afid->Fid.Unique)) {
1690 if (tvp->states & VRO) tvc->states |= CRO;
1691 if (tvp->states & VBackup) tvc->states |= CBackup;
1692 /* now copy ".." entry back out of volume structure, if necessary */
1693 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
1695 tvc->mvid = (struct VenusFid *)
1696 osi_AllocSmallSpace(sizeof(struct VenusFid));
1697 *tvc->mvid = tvp->dotdot;
1699 afs_PutVolume(tvp, READ_LOCK);
1703 afs_RemoveVCB(afid);
1705 struct AFSFetchStatus OutStatus;
1707 if (afs_DynrootNewVnode(tvc, &OutStatus)) {
1708 afs_ProcessFS(tvc, &OutStatus, areq);
1709 tvc->states |= CStatd | CUnique;
1712 code = afs_FetchStatus(tvc, afid, areq, &OutStatus);
1717 ReleaseWriteLock(&tvc->lock);
1719 ObtainReadLock(&afs_xvcache);
1721 ReleaseReadLock(&afs_xvcache);
1722 return (struct vcache *) 0;
1725 ReleaseWriteLock(&tvc->lock);
1726 #ifdef AFS_DARWIN_ENV
1735 struct vcache *afs_LookupVCache(struct VenusFid *afid, struct vrequest *areq,
1736 afs_int32 *cached, afs_int32 locktype,
1737 struct vcache *adp, char *aname)
1739 afs_int32 code, now, newvcache=0, hash;
1740 struct VenusFid nfid;
1741 register struct vcache *tvc;
1743 struct AFSFetchStatus OutStatus;
1744 struct AFSCallBack CallBack;
1745 struct AFSVolSync tsync;
1746 struct server *serverp = 0;
1750 AFS_STATCNT(afs_GetVCache);
1751 if (cached) *cached = 0; /* Init just in case */
1754 ObtainReadLock(&afs_xvcache);
1755 tvc = afs_FindVCache(afid, 0, 0, &retry, DO_STATS /* no vlru */);
1758 ReleaseReadLock(&afs_xvcache);
1760 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1761 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1765 ObtainReadLock(&tvc->lock);
1767 if (tvc->states & CStatd) {
1771 ReleaseReadLock(&tvc->lock);
1774 tvc->states &= ~CUnique;
1776 ReleaseReadLock(&tvc->lock);
1777 ObtainReadLock(&afs_xvcache);
1781 ReleaseReadLock(&afs_xvcache);
1783 /* lookup the file */
1786 origCBs = afs_allCBs; /* if anything changes, we don't have a cb */
1787 code = afs_RemoteLookup(&adp->fid, areq, aname, &nfid, &OutStatus, &CallBack,
1791 ObtainSharedLock(&afs_xvcache,6);
1792 tvc = afs_FindVCache(&nfid, 0, 0, &retry, DO_VLRU /* no xstats now*/);
1794 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1795 ReleaseSharedLock(&afs_xvcache);
1796 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1802 /* no cache entry, better grab one */
1803 UpgradeSToWLock(&afs_xvcache,22);
1804 tvc = afs_NewVCache(&nfid, (struct server *)0, 1, WRITE_LOCK);
1806 ConvertWToSLock(&afs_xvcache);
1809 ReleaseSharedLock(&afs_xvcache);
1810 ObtainWriteLock(&tvc->lock,55);
1812 /* It is always appropriate to throw away all the access rights? */
1813 afs_FreeAllAxs(&(tvc->Access));
1814 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-vol info */
1816 if ((tvp->states & VForeign)) {
1817 if (newvcache) tvc->states |= CForeign;
1818 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
1819 && (tvp->rootUnique == afid->Fid.Unique))
1822 if (tvp->states & VRO) tvc->states |= CRO;
1823 if (tvp->states & VBackup) tvc->states |= CBackup;
1824 /* now copy ".." entry back out of volume structure, if necessary */
1825 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
1827 tvc->mvid = (struct VenusFid *)
1828 osi_AllocSmallSpace(sizeof(struct VenusFid));
1829 *tvc->mvid = tvp->dotdot;
1834 ObtainWriteLock(&afs_xcbhash, 465);
1835 afs_DequeueCallback(tvc);
1836 tvc->states &= ~( CStatd | CUnique );
1837 ReleaseWriteLock(&afs_xcbhash);
1838 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
1839 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
1841 afs_PutVolume(tvp, READ_LOCK);
1842 ReleaseWriteLock(&tvc->lock);
1843 ObtainReadLock(&afs_xvcache);
1845 ReleaseReadLock(&afs_xvcache);
1846 return (struct vcache *) 0;
1849 ObtainWriteLock(&afs_xcbhash, 466);
1850 if (origCBs == afs_allCBs) {
1851 if (CallBack.ExpirationTime) {
1852 tvc->callback = serverp;
1853 tvc->cbExpires = CallBack.ExpirationTime+now;
1854 tvc->states |= CStatd | CUnique;
1855 tvc->states &= ~CBulkFetching;
1856 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvp);
1857 } else if (tvc->states & CRO) {
1858 /* adapt gives us an hour. */
1859 tvc->cbExpires = 3600+osi_Time(); /*XXX*/
1860 tvc->states |= CStatd | CUnique;
1861 tvc->states &= ~CBulkFetching;
1862 afs_QueueCallback(tvc, CBHash(3600), tvp);
1864 tvc->callback = (struct server *)0;
1865 afs_DequeueCallback(tvc);
1866 tvc->states &= ~(CStatd | CUnique);
1867 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
1868 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
1871 afs_DequeueCallback(tvc);
1872 tvc->states &= ~CStatd;
1873 tvc->states &= ~CUnique;
1874 tvc->callback = (struct server *)0;
1875 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
1876 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
1878 ReleaseWriteLock(&afs_xcbhash);
1880 afs_PutVolume(tvp, READ_LOCK);
1881 afs_ProcessFS(tvc, &OutStatus, areq);
1883 ReleaseWriteLock(&tvc->lock);
1884 #ifdef AFS_DARWIN_ENV
1891 struct vcache *afs_GetRootVCache(struct VenusFid *afid,
1892 struct vrequest *areq, afs_int32 *cached,
1893 struct volume *tvolp, afs_int32 locktype)
1895 afs_int32 code, i, newvcache = 0, haveStatus = 0;
1896 afs_int32 getNewFid = 0;
1898 struct VenusFid nfid;
1899 register struct vcache *tvc;
1900 struct server *serverp = 0;
1901 struct AFSFetchStatus OutStatus;
1902 struct AFSCallBack CallBack;
1903 struct AFSVolSync tsync;
1909 if (!tvolp->rootVnode || getNewFid) {
1910 struct VenusFid tfid;
1913 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
1914 origCBs = afs_allCBs; /* ignore InitCallBackState */
1915 code = afs_RemoteLookup(&tfid, areq, (char *)0, &nfid,
1916 &OutStatus, &CallBack, &serverp, &tsync);
1918 return (struct vcache *)0;
1920 /* ReleaseReadLock(&tvolp->lock); */
1921 ObtainWriteLock(&tvolp->lock,56);
1922 tvolp->rootVnode = afid->Fid.Vnode = nfid.Fid.Vnode;
1923 tvolp->rootUnique = afid->Fid.Unique = nfid.Fid.Unique;
1924 ReleaseWriteLock(&tvolp->lock);
1925 /* ObtainReadLock(&tvolp->lock);*/
1928 afid->Fid.Vnode = tvolp->rootVnode;
1929 afid->Fid.Unique = tvolp->rootUnique;
1932 ObtainSharedLock(&afs_xvcache,7);
1934 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
1935 if (!FidCmp(&(tvc->fid), afid)) {
1937 /* Grab this vnode, possibly reactivating from the free list */
1938 /* for the present (95.05.25) everything on the hash table is
1939 * definitively NOT in the free list -- at least until afs_reclaim
1940 * can be safely implemented */
1943 vg = vget((struct vnode *)tvc); /* this bumps ref count */
1947 #endif /* AFS_OSF_ENV */
1952 if (!haveStatus && (!tvc || !(tvc->states & CStatd))) {
1953 /* Mount point no longer stat'd or unknown. FID may have changed. */
1958 tvc = (struct vcache*)0;
1960 ReleaseSharedLock(&afs_xvcache);
1965 UpgradeSToWLock(&afs_xvcache,23);
1966 /* no cache entry, better grab one */
1967 tvc = afs_NewVCache(afid, (struct server *)0, 1, WRITE_LOCK);
1969 afs_stats_cmperf.vcacheMisses++;
1972 if (cached) *cached = 1;
1973 afs_stats_cmperf.vcacheHits++;
1975 /* we already bumped the ref count in the for loop above */
1976 #else /* AFS_OSF_ENV */
1979 UpgradeSToWLock(&afs_xvcache,24);
1980 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
1981 refpanic ("GRVC VLRU inconsistent0");
1983 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
1984 refpanic ("GRVC VLRU inconsistent1");
1986 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
1987 refpanic ("GRVC VLRU inconsistent2");
1989 QRemove(&tvc->vlruq); /* move to lruq head */
1990 QAdd(&VLRU, &tvc->vlruq);
1991 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
1992 refpanic ("GRVC VLRU inconsistent3");
1994 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
1995 refpanic ("GRVC VLRU inconsistent4");
1997 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
1998 refpanic ("GRVC VLRU inconsistent5");
2003 ReleaseWriteLock(&afs_xvcache);
2005 if (tvc->states & CStatd) {
2009 ObtainReadLock(&tvc->lock);
2010 tvc->states &= ~CUnique;
2011 tvc->callback = (struct server *)0; /* redundant, perhaps */
2012 ReleaseReadLock(&tvc->lock);
2015 ObtainWriteLock(&tvc->lock,57);
2017 /* It is always appropriate to throw away all the access rights? */
2018 afs_FreeAllAxs(&(tvc->Access));
2020 if (newvcache) tvc->states |= CForeign;
2021 if (tvolp->states & VRO) tvc->states |= CRO;
2022 if (tvolp->states & VBackup) tvc->states |= CBackup;
2023 /* now copy ".." entry back out of volume structure, if necessary */
2024 if (newvcache && (tvolp->rootVnode == afid->Fid.Vnode)
2025 && (tvolp->rootUnique == afid->Fid.Unique)) {
2028 if (tvc->mvstat == 2 && tvolp->dotdot.Fid.Volume != 0) {
2030 tvc->mvid = (struct VenusFid *)osi_AllocSmallSpace(sizeof(struct VenusFid));
2031 *tvc->mvid = tvolp->dotdot;
2035 afs_RemoveVCB(afid);
2038 struct VenusFid tfid;
2041 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
2042 origCBs = afs_allCBs; /* ignore InitCallBackState */
2043 code = afs_RemoteLookup(&tfid, areq, (char *)0, &nfid, &OutStatus,
2044 &CallBack, &serverp, &tsync);
2048 ObtainWriteLock(&afs_xcbhash, 467);
2049 afs_DequeueCallback(tvc);
2050 tvc->callback = (struct server *)0;
2051 tvc->states &= ~(CStatd|CUnique);
2052 ReleaseWriteLock(&afs_xcbhash);
2053 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2054 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2055 ReleaseWriteLock(&tvc->lock);
2056 ObtainReadLock(&afs_xvcache);
2058 ReleaseReadLock(&afs_xvcache);
2059 return (struct vcache *) 0;
2062 ObtainWriteLock(&afs_xcbhash, 468);
2063 if (origCBs == afs_allCBs) {
2064 tvc->states |= CTruth;
2065 tvc->callback = serverp;
2066 if (CallBack.ExpirationTime != 0) {
2067 tvc->cbExpires = CallBack.ExpirationTime+start;
2068 tvc->states |= CStatd;
2069 tvc->states &= ~CBulkFetching;
2070 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvolp);
2071 } else if (tvc->states & CRO) {
2072 /* adapt gives us an hour. */
2073 tvc->cbExpires = 3600+osi_Time(); /*XXX*/
2074 tvc->states |= CStatd;
2075 tvc->states &= ~CBulkFetching;
2076 afs_QueueCallback(tvc, CBHash(3600), tvolp);
2079 afs_DequeueCallback(tvc);
2080 tvc->callback = (struct server *)0;
2081 tvc->states &= ~(CStatd | CUnique);
2082 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2083 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2085 ReleaseWriteLock(&afs_xcbhash);
2086 afs_ProcessFS(tvc, &OutStatus, areq);
2088 ReleaseWriteLock(&tvc->lock);
2095 * must be called with avc write-locked
2096 * don't absolutely have to invalidate the hint unless the dv has
2097 * changed, but be sure to get it right else there will be consistency bugs.
2099 afs_int32 afs_FetchStatus(struct vcache *avc, struct VenusFid *afid,
2100 struct vrequest *areq, struct AFSFetchStatus *Outsp)
2104 register struct conn *tc;
2105 struct AFSCallBack CallBack;
2106 struct AFSVolSync tsync;
2107 struct volume* volp;
2111 tc = afs_Conn(afid, areq, SHARED_LOCK);
2112 avc->quick.stamp = 0; avc->h1.dchint = NULL; /* invalidate hints */
2114 avc->callback = tc->srvr->server;
2116 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_FETCHSTATUS);
2117 #ifdef RX_ENABLE_LOCKS
2119 #endif /* RX_ENABLE_LOCKS */
2120 code = RXAFS_FetchStatus(tc->id,
2121 (struct AFSFid *) &afid->Fid,
2122 Outsp, &CallBack, &tsync);
2123 #ifdef RX_ENABLE_LOCKS
2125 #endif /* RX_ENABLE_LOCKS */
2132 (afs_Analyze(tc, code, afid, areq,
2133 AFS_STATS_FS_RPCIDX_FETCHSTATUS,
2134 SHARED_LOCK, (struct cell *)0));
2137 afs_ProcessFS(avc, Outsp, areq);
2138 volp = afs_GetVolume(afid, areq, READ_LOCK);
2139 ObtainWriteLock(&afs_xcbhash, 469);
2140 avc->states |= CTruth;
2141 if (avc->callback /* check for race */) {
2142 if (CallBack.ExpirationTime != 0) {
2143 avc->cbExpires = CallBack.ExpirationTime+start;
2144 avc->states |= CStatd;
2145 avc->states &= ~CBulkFetching;
2146 afs_QueueCallback(avc, CBHash(CallBack.ExpirationTime), volp);
2148 else if (avc->states & CRO)
2149 { /* ordinary callback on a read-only volume -- AFS 3.2 style */
2150 avc->cbExpires = 3600+start;
2151 avc->states |= CStatd;
2152 avc->states &= ~CBulkFetching;
2153 afs_QueueCallback(avc, CBHash(3600), volp);
2156 afs_DequeueCallback(avc);
2157 avc->callback = (struct server *)0;
2158 avc->states &= ~(CStatd|CUnique);
2159 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
2160 osi_dnlc_purgedp (avc); /* if it (could be) a directory */
2164 afs_DequeueCallback(avc);
2165 avc->callback = (struct server *)0;
2166 avc->states &= ~(CStatd|CUnique);
2167 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
2168 osi_dnlc_purgedp (avc); /* if it (could be) a directory */
2170 ReleaseWriteLock(&afs_xcbhash);
2172 afs_PutVolume(volp, READ_LOCK);
2174 else { /* used to undo the local callback, but that's too extreme.
2175 * There are plenty of good reasons that fetchstatus might return
2176 * an error, such as EPERM. If we have the vnode cached, statd,
2177 * with callback, might as well keep track of the fact that we
2178 * don't have access...
2180 if (code == EPERM || code == EACCES) {
2181 struct axscache *ac;
2182 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
2184 else /* not found, add a new one if possible */
2185 afs_AddAxs(avc->Access, areq->uid, 0);
2196 * Stuff some information into the vcache for the given file.
2199 * afid : File in question.
2200 * OutStatus : Fetch status on the file.
2201 * CallBack : Callback info.
2202 * tc : RPC connection involved.
2203 * areq : vrequest involved.
2206 * Nothing interesting.
2209 afs_StuffVcache(afid, OutStatus, CallBack, tc, areq)
2210 register struct VenusFid *afid;
2211 struct AFSFetchStatus *OutStatus;
2212 struct AFSCallBack *CallBack;
2213 register struct conn *tc;
2214 struct vrequest *areq;
2216 { /*afs_StuffVcache*/
2218 register afs_int32 code, i, newvcache=0;
2219 register struct vcache *tvc;
2220 struct AFSVolSync tsync;
2222 struct axscache *ac;
2225 AFS_STATCNT(afs_StuffVcache);
2226 #ifdef IFS_VCACHECOUNT
2231 ObtainSharedLock(&afs_xvcache,8);
2233 tvc = afs_FindVCache(afid, 0, 0, &retry, DO_VLRU /* no stats */);
2235 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2236 ReleaseSharedLock(&afs_xvcache);
2237 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2243 /* no cache entry, better grab one */
2244 UpgradeSToWLock(&afs_xvcache,25);
2245 tvc = afs_NewVCache(afid, (struct server *)0, 1, WRITE_LOCK);
2247 ConvertWToSLock(&afs_xvcache);
2250 ReleaseSharedLock(&afs_xvcache);
2251 ObtainWriteLock(&tvc->lock,58);
2253 tvc->states &= ~CStatd;
2254 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2255 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2257 /* Is it always appropriate to throw away all the access rights? */
2258 afs_FreeAllAxs(&(tvc->Access));
2260 /*Copy useful per-volume info*/
2261 tvp = afs_GetVolume(afid, areq, READ_LOCK);
2263 if (newvcache && (tvp->states & VForeign)) tvc->states |= CForeign;
2264 if (tvp->states & VRO) tvc->states |= CRO;
2265 if (tvp->states & VBackup) tvc->states |= CBackup;
2267 * Now, copy ".." entry back out of volume structure, if
2270 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
2271 if (!tvc->mvid) tvc->mvid =
2272 (struct VenusFid *) osi_AllocSmallSpace(sizeof(struct VenusFid));
2273 *tvc->mvid = tvp->dotdot;
2276 /* store the stat on the file */
2277 afs_RemoveVCB(afid);
2278 afs_ProcessFS(tvc, OutStatus, areq);
2279 tvc->callback = tc->srvr->server;
2281 /* we use osi_Time twice below. Ideally, we would use the time at which
2282 * the FetchStatus call began, instead, but we don't have it here. So we
2283 * make do with "now". In the CRO case, it doesn't really matter. In
2284 * the other case, we hope that the difference between "now" and when the
2285 * call actually began execution on the server won't be larger than the
2286 * padding which the server keeps. Subtract 1 second anyway, to be on
2287 * the safe side. Can't subtract more because we don't know how big
2288 * ExpirationTime is. Possible consistency problems may arise if the call
2289 * timeout period becomes longer than the server's expiration padding. */
2290 ObtainWriteLock(&afs_xcbhash, 470);
2291 if (CallBack->ExpirationTime != 0) {
2292 tvc->cbExpires = CallBack->ExpirationTime+osi_Time()-1;
2293 tvc->states |= CStatd;
2294 tvc->states &= ~CBulkFetching;
2295 afs_QueueCallback(tvc, CBHash(CallBack->ExpirationTime), tvp);
2297 else if (tvc->states & CRO) {
2298 /* old-fashioned AFS 3.2 style */
2299 tvc->cbExpires = 3600+osi_Time(); /*XXX*/
2300 tvc->states |= CStatd;
2301 tvc->states &= ~CBulkFetching;
2302 afs_QueueCallback(tvc, CBHash(3600), tvp);
2305 afs_DequeueCallback(tvc);
2306 tvc->callback = (struct server *)0;
2307 tvc->states &= ~(CStatd|CUnique);
2308 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2309 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2311 ReleaseWriteLock(&afs_xcbhash);
2313 afs_PutVolume(tvp, READ_LOCK);
2315 /* look in per-pag cache */
2316 if (tvc->Access && (ac = afs_FindAxs(tvc->Access, areq->uid)))
2317 ac->axess = OutStatus->CallerAccess; /* substitute pags */
2318 else /* not found, add a new one if possible */
2319 afs_AddAxs(tvc->Access, areq->uid, OutStatus->CallerAccess);
2321 ReleaseWriteLock(&tvc->lock);
2322 afs_Trace4(afs_iclSetp, CM_TRACE_STUFFVCACHE, ICL_TYPE_POINTER, tvc,
2323 ICL_TYPE_POINTER, tvc->callback, ICL_TYPE_INT32, tvc->cbExpires,
2324 ICL_TYPE_INT32, tvc->cbExpires-osi_Time());
2326 * Release ref count... hope this guy stays around...
2328 afs_PutVCache(tvc, WRITE_LOCK);
2329 } /*afs_StuffVcache*/
2336 * Decrements the reference count on a cache entry.
2339 * avc : Pointer to the cache entry to decrement.
2342 * Nothing interesting.
2345 afs_PutVCache(avc, locktype)
2346 register struct vcache *avc;
2350 AFS_STATCNT(afs_PutVCache);
2352 * Can we use a read lock here?
2354 ObtainReadLock(&afs_xvcache);
2356 ReleaseReadLock(&afs_xvcache);
2363 * Find a vcache entry given a fid.
2366 * afid : Pointer to the fid whose cache entry we desire.
2367 * retry: (SGI-specific) tell the caller to drop the lock on xvcache,
2368 * unlock the vnode, and try again.
2369 * flags: bit 1 to specify whether to compute hit statistics. Not
2370 * set if FindVCache is called as part of internal bookkeeping.
2373 * Must be called with the afs_xvcache lock at least held at
2374 * the read level. In order to do the VLRU adjustment, the xvcache lock
2375 * must be shared-- we upgrade it here.
2378 struct vcache *afs_FindVCache(struct VenusFid *afid, afs_int32 lockit,
2379 afs_int32 locktype, afs_int32 *retry, afs_int32 flag)
2382 register struct vcache *tvc;
2385 AFS_STATCNT(afs_FindVCache);
2388 for(tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2389 if (FidMatches(afid, tvc)) {
2391 /* Grab this vnode, possibly reactivating from the free list */
2394 vg = vget((struct vnode *)tvc);
2398 #endif /* AFS_OSF_ENV */
2403 /* should I have a read lock on the vnode here? */
2405 if (retry) *retry = 0;
2406 #if !defined(AFS_OSF_ENV)
2407 osi_vnhold(tvc, retry); /* already held, above */
2408 if (retry && *retry)
2412 * only move to front of vlru if we have proper vcache locking)
2414 if (flag & DO_VLRU) {
2415 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2416 refpanic ("FindVC VLRU inconsistent1");
2418 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2419 refpanic ("FindVC VLRU inconsistent1");
2421 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2422 refpanic ("FindVC VLRU inconsistent2");
2424 UpgradeSToWLock(&afs_xvcache,26);
2425 QRemove(&tvc->vlruq);
2426 QAdd(&VLRU, &tvc->vlruq);
2427 ConvertWToSLock(&afs_xvcache);
2428 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2429 refpanic ("FindVC VLRU inconsistent1");
2431 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2432 refpanic ("FindVC VLRU inconsistent2");
2434 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2435 refpanic ("FindVC VLRU inconsistent3");
2441 if (flag & DO_STATS) {
2442 if (tvc) afs_stats_cmperf.vcacheHits++;
2443 else afs_stats_cmperf.vcacheMisses++;
2444 if (afid->Cell == LOCALCELL)
2445 afs_stats_cmperf.vlocalAccesses++;
2447 afs_stats_cmperf.vremoteAccesses++;
2450 #ifdef AFS_LINUX22_ENV
2451 if (tvc && (tvc->states & CStatd))
2452 vcache2inode(tvc); /* mainly to reset i_nlink */
2454 #ifdef AFS_DARWIN_ENV
2459 } /*afs_FindVCache*/
2465 * Find a vcache entry given a fid. Does a wildcard match on what we
2466 * have for the fid. If more than one entry, don't return anything.
2469 * avcp : Fill in pointer if we found one and only one.
2470 * afid : Pointer to the fid whose cache entry we desire.
2471 * retry: (SGI-specific) tell the caller to drop the lock on xvcache,
2472 * unlock the vnode, and try again.
2473 * flags: bit 1 to specify whether to compute hit statistics. Not
2474 * set if FindVCache is called as part of internal bookkeeping.
2477 * Must be called with the afs_xvcache lock at least held at
2478 * the read level. In order to do the VLRU adjustment, the xvcache lock
2479 * must be shared-- we upgrade it here.
2482 * number of matches found.
2485 int afs_duplicate_nfs_fids=0;
2487 afs_int32 afs_NFSFindVCache(avcp, afid, lockit)
2488 struct vcache **avcp;
2489 struct VenusFid *afid;
2491 { /*afs_FindVCache*/
2493 register struct vcache *tvc;
2495 afs_int32 retry = 0;
2496 afs_int32 count = 0;
2497 struct vcache *found_tvc = NULL;
2499 AFS_STATCNT(afs_FindVCache);
2503 ObtainSharedLock(&afs_xvcache,331);
2506 for(tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2507 /* Match only on what we have.... */
2508 if (((tvc->fid.Fid.Vnode & 0xffff) == afid->Fid.Vnode)
2509 && (tvc->fid.Fid.Volume == afid->Fid.Volume)
2510 && ((tvc->fid.Fid.Unique & 0xffffff) == afid->Fid.Unique)
2511 && (tvc->fid.Cell == afid->Cell)) {
2513 /* Grab this vnode, possibly reactivating from the free list */
2516 vg = vget((struct vnode *)tvc);
2519 /* This vnode no longer exists. */
2522 #endif /* AFS_OSF_ENV */
2527 /* Drop our reference counts. */
2528 vrele((struct vnode *)tvc);
2529 vrele((struct vnode *)found_tvc);
2531 afs_duplicate_nfs_fids++;
2532 ReleaseSharedLock(&afs_xvcache);
2540 /* should I have a read lock on the vnode here? */
2542 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2543 osi_vnhold(tvc, &retry);
2546 found_tvc = (struct vcache*)0;
2547 ReleaseSharedLock(&afs_xvcache);
2548 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2552 #if !defined(AFS_OSF_ENV)
2553 osi_vnhold(tvc, (int*)0); /* already held, above */
2557 * We obtained the xvcache lock above.
2559 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2560 refpanic ("FindVC VLRU inconsistent1");
2562 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2563 refpanic ("FindVC VLRU inconsistent1");
2565 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2566 refpanic ("FindVC VLRU inconsistent2");
2568 UpgradeSToWLock(&afs_xvcache,568);
2569 QRemove(&tvc->vlruq);
2570 QAdd(&VLRU, &tvc->vlruq);
2571 ConvertWToSLock(&afs_xvcache);
2572 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2573 refpanic ("FindVC VLRU inconsistent1");
2575 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2576 refpanic ("FindVC VLRU inconsistent2");
2578 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2579 refpanic ("FindVC VLRU inconsistent3");
2584 if (tvc) afs_stats_cmperf.vcacheHits++;
2585 else afs_stats_cmperf.vcacheMisses++;
2586 if (afid->Cell == LOCALCELL)
2587 afs_stats_cmperf.vlocalAccesses++;
2589 afs_stats_cmperf.vremoteAccesses++;
2591 *avcp = tvc; /* May be null */
2593 ReleaseSharedLock(&afs_xvcache);
2594 return (tvc ? 1 : 0);
2596 } /*afs_NFSFindVCache*/
2604 * Initialize vcache related variables
2606 void afs_vcacheInit(int astatSize)
2608 register struct vcache *tvp;
2610 #if defined(AFS_OSF_ENV)
2611 if (!afs_maxvcount) {
2612 #if defined(AFS_OSF30_ENV)
2613 afs_maxvcount = max_vnodes/2; /* limit ourselves to half the total */
2615 afs_maxvcount = nvnode/2; /* limit ourselves to half the total */
2617 if (astatSize < afs_maxvcount) {
2618 afs_maxvcount = astatSize;
2621 #else /* AFS_OSF_ENV */
2622 freeVCList = (struct vcache *)0;
2625 RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
2626 LOCK_INIT(&afs_xvcb, "afs_xvcb");
2628 #if !defined(AFS_OSF_ENV)
2629 /* Allocate and thread the struct vcache entries */
2630 tvp = (struct vcache *) afs_osi_Alloc(astatSize * sizeof(struct vcache));
2631 memset((char *)tvp, 0, sizeof(struct vcache)*astatSize);
2633 Initial_freeVCList = tvp;
2634 freeVCList = &(tvp[0]);
2635 for(i=0; i < astatSize-1; i++) {
2636 tvp[i].nextfree = &(tvp[i+1]);
2638 tvp[astatSize-1].nextfree = (struct vcache *) 0;
2639 #ifdef AFS_AIX32_ENV
2640 pin((char *)tvp, astatSize * sizeof(struct vcache)); /* XXX */
2645 #if defined(AFS_SGI_ENV)
2646 for(i=0; i < astatSize; i++) {
2647 char name[METER_NAMSZ];
2648 struct vcache *tvc = &tvp[i];
2650 tvc->v.v_number = ++afsvnumbers;
2651 tvc->vc_rwlockid = OSI_NO_LOCKID;
2652 initnsema(&tvc->vc_rwlock, 1, makesname(name, "vrw", tvc->v.v_number));
2653 #ifndef AFS_SGI53_ENV
2654 initnsema(&tvc->v.v_sync, 0, makesname(name, "vsy", tvc->v.v_number));
2656 #ifndef AFS_SGI62_ENV
2657 initnlock(&tvc->v.v_lock, makesname(name, "vlk", tvc->v.v_number));
2658 #endif /* AFS_SGI62_ENV */
2671 void shutdown_vcache(void)
2674 struct afs_cbr *tsp, *nsp;
2676 * XXX We may potentially miss some of the vcaches because if when there're no
2677 * free vcache entries and all the vcache entries are active ones then we allocate
2678 * an additional one - admittedly we almost never had that occur.
2680 #if !defined(AFS_OSF_ENV)
2681 afs_osi_Free(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
2683 #ifdef AFS_AIX32_ENV
2684 unpin(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
2688 register struct afs_q *tq, *uq;
2689 register struct vcache *tvc;
2690 for (tq = VLRU.prev; tq != &VLRU; tq = uq) {
2694 osi_FreeSmallSpace(tvc->mvid);
2695 tvc->mvid = (struct VenusFid*)0;
2698 aix_gnode_rele((struct vnode *)tvc);
2700 if (tvc->linkData) {
2701 afs_osi_Free(tvc->linkData, strlen(tvc->linkData)+1);
2706 * Also free the remaining ones in the Cache
2708 for (i=0; i < VCSIZE; i++) {
2709 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2711 osi_FreeSmallSpace(tvc->mvid);
2712 tvc->mvid = (struct VenusFid*)0;
2716 afs_osi_Free(tvc->v.v_gnode, sizeof(struct gnode));
2717 #ifdef AFS_AIX32_ENV
2720 vms_delete(tvc->segid);
2722 tvc->segid = tvc->vmh = NULL;
2723 if (VREFCOUNT(tvc)) osi_Panic("flushVcache: vm race");
2731 #if defined(AFS_SUN5_ENV)
2737 if (tvc->linkData) {
2738 afs_osi_Free(tvc->linkData, strlen(tvc->linkData)+1);
2742 afs_FreeAllAxs(&(tvc->Access));
2748 * Free any leftover callback queue
2750 for (tsp = afs_cbrSpace; tsp; tsp = nsp ) {
2752 afs_osi_Free((char *)tsp, AFS_NCBRS * sizeof(struct afs_cbr));
2756 #if !defined(AFS_OSF_ENV)
2757 freeVCList = Initial_freeVCList = 0;
2759 RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
2760 LOCK_INIT(&afs_xvcb, "afs_xvcb");