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 for(tq = VLRU.prev; tq != &VLRU && vn > 0; tq = uq) {
575 if (tvc->states & CVFlushed)
576 refpanic ("CVFlushed on VLRU");
578 refpanic ("Exceeded pool of AFS vnodes(VLRU cycle?)");
579 else if (QNext(uq) != tq)
580 refpanic ("VLRU inconsistent");
582 if (tvc == afs_globalVp)
585 if ( VREFCOUNT(tvc) && tvc->opens == 0 ) {
586 struct inode *ip = (struct inode*)tvc;
587 if (list_empty(&ip->i_dentry)) {
591 struct list_head *cur;
592 struct list_head *head = &ip->i_dentry;
595 #if defined(AFS_LINUX24_ENV)
596 spin_lock(&dcache_lock);
599 while ((cur = cur->next) != head) {
600 struct dentry *dentry = list_entry(cur, struct dentry, d_alias);
601 #if defined(AFS_LINUX24_ENV)
602 if (!atomic_read(&dentry->d_count)) {
604 if (!dentry->d_count) {
607 #if defined(AFS_LINUX24_ENV)
609 spin_unlock(&dcache_lock);
622 #if defined(AFS_LINUX24_ENV)
623 spin_unlock(&dcache_lock);
631 #endif /* AFS_LINUX22_ENV */
634 if (afs_vcount >= afs_maxvcount)
637 * If we are using > 33 % of the total system vnodes for AFS vcache
638 * entries or we are using the maximum number of vcache entries,
639 * then free some. (if our usage is > 33% we should free some, if
640 * our usage is > afs_maxvcount, set elsewhere to 0.5*nvnode,
641 * we _must_ free some -- no choice).
643 if ( (( 3 * afs_vcount ) > nvnode) || ( afs_vcount >= afs_maxvcount ))
646 struct afs_q *tq, *uq;
647 int i; char *panicstr;
650 for(tq = VLRU.prev; tq != &VLRU && anumber > 0; tq = uq) {
653 if (tvc->states & CVFlushed)
654 refpanic ("CVFlushed on VLRU");
655 else if (i++ > afs_maxvcount)
656 refpanic ("Exceeded pool of AFS vnodes(VLRU cycle?)");
657 else if (QNext(uq) != tq)
658 refpanic ("VLRU inconsistent");
659 else if (VREFCOUNT(tvc) < 1)
660 refpanic ("refcnt 0 on VLRU");
662 if ( VREFCOUNT(tvc) == 1 && tvc->opens == 0
663 && (tvc->states & CUnlinkedDel) == 0) {
664 code = afs_FlushVCache(tvc, &fv_slept);
671 continue; /* start over - may have raced. */
676 if (anumber == VCACHE_FREE) {
677 printf("NewVCache: warning none freed, using %d of %d\n",
678 afs_vcount, afs_maxvcount);
679 if (afs_vcount >= afs_maxvcount) {
680 osi_Panic("NewVCache - none freed");
681 /* XXX instead of panicing, should do afs_maxvcount++
682 and magic up another one */
688 if (getnewvnode(MOUNT_AFS, &Afs_vnodeops, &nvc)) {
689 /* What should we do ???? */
690 osi_Panic("afs_NewVCache: no more vnodes");
695 tvc->nextfree = (struct vcache *)0;
697 #else /* AFS_OSF_ENV */
698 /* pull out a free cache entry */
701 for(tq = VLRU.prev; (anumber > 0) && (tq != &VLRU); tq = uq) {
705 if (tvc->states & CVFlushed)
706 refpanic("CVFlushed on VLRU");
707 else if (i++ > 2*afs_cacheStats) /* even allowing for a few xallocs...*/
708 refpanic("Increase -stat parameter of afsd(VLRU cycle?)");
709 else if (QNext(uq) != tq)
710 refpanic("VLRU inconsistent");
712 #ifdef AFS_DARWIN_ENV
713 if (tvc->opens == 0 && ((tvc->states & CUnlinkedDel) == 0) &&
714 VREFCOUNT(tvc) == 1 && UBCINFOEXISTS(&tvc->v)) {
715 osi_VM_TryReclaim(tvc, &fv_slept);
719 continue; /* start over - may have raced. */
723 if (VREFCOUNT(tvc) == 0 && tvc->opens == 0
724 && (tvc->states & CUnlinkedDel) == 0) {
725 code = afs_FlushVCache(tvc, &fv_slept);
732 continue; /* start over - may have raced. */
735 if (tq == uq ) break;
739 /* none free, making one is better than a panic */
740 afs_stats_cmperf.vcacheXAllocs++; /* count in case we have a leak */
741 tvc = (struct vcache *) afs_osi_Alloc(sizeof (struct vcache));
743 pin((char *)tvc, sizeof(struct vcache)); /* XXX */
746 /* In case it still comes here we need to fill this */
747 tvc->v.v_vm_info = VM_INFO_NULL;
748 vm_info_init(tvc->v.v_vm_info);
749 /* perhaps we should also do close_flush on non-NeXT mach systems;
750 * who knows; we don't currently have the sources.
752 #endif /* AFS_MACH_ENV */
753 #if defined(AFS_SGI_ENV)
754 { char name[METER_NAMSZ];
755 memset(tvc, 0, sizeof(struct vcache));
756 tvc->v.v_number = ++afsvnumbers;
757 tvc->vc_rwlockid = OSI_NO_LOCKID;
758 initnsema(&tvc->vc_rwlock, 1, makesname(name, "vrw", tvc->v.v_number));
759 #ifndef AFS_SGI53_ENV
760 initnsema(&tvc->v.v_sync, 0, makesname(name, "vsy", tvc->v.v_number));
762 #ifndef AFS_SGI62_ENV
763 initnlock(&tvc->v.v_lock, makesname(name, "vlk", tvc->v.v_number));
766 #endif /* AFS_SGI_ENV */
769 tvc = freeVCList; /* take from free list */
770 freeVCList = tvc->nextfree;
771 tvc->nextfree = (struct vcache *)0;
773 #endif /* AFS_OSF_ENV */
776 vm_info_ptr = tvc->v.v_vm_info;
777 #endif /* AFS_MACH_ENV */
779 #if !defined(AFS_SGI_ENV) && !defined(AFS_OSF_ENV)
780 memset((char *)tvc, 0, sizeof(struct vcache));
785 RWLOCK_INIT(&tvc->lock, "vcache lock");
786 #if defined(AFS_SUN5_ENV)
787 RWLOCK_INIT(&tvc->vlock, "vcache vlock");
788 #endif /* defined(AFS_SUN5_ENV) */
791 tvc->v.v_vm_info = vm_info_ptr;
792 tvc->v.v_vm_info->pager = MEMORY_OBJECT_NULL;
793 #endif /* AFS_MACH_ENV */
794 tvc->parentVnode = 0;
795 tvc->mvid = (struct VenusFid *) 0;
796 tvc->linkData = (char *) 0;
799 tvc->execsOrWriters = 0;
803 tvc->last_looker = 0;
805 tvc->asynchrony = -1;
807 afs_symhint_inval(tvc);
809 tvc->flushDV.low = tvc->flushDV.high = AFS_MAXDV;
812 tvc->truncPos = AFS_NOTRUNC; /* don't truncate until we need to */
813 hzero(tvc->m.DataVersion); /* in case we copy it into flushDV */
815 /* Hold it for the LRU (should make count 2) */
816 VN_HOLD((struct vnode *)tvc);
817 #else /* AFS_OSF_ENV */
818 VREFCOUNT_SET(tvc, 1); /* us */
819 #endif /* AFS_OSF_ENV */
821 LOCK_INIT(&tvc->pvmlock, "vcache pvmlock");
822 tvc->vmh = tvc->segid = NULL;
825 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
826 #if defined(AFS_SUN5_ENV)
827 rw_init(&tvc->rwlock, "vcache rwlock", RW_DEFAULT, NULL);
829 #if defined(AFS_SUN55_ENV)
830 /* This is required if the kaio (kernel aynchronous io)
831 ** module is installed. Inside the kernel, the function
832 ** check_vp( common/os/aio.c) checks to see if the kernel has
833 ** to provide asynchronous io for this vnode. This
834 ** function extracts the device number by following the
835 ** v_data field of the vnode. If we do not set this field
836 ** then the system panics. The value of the v_data field
837 ** is not really important for AFS vnodes because the kernel
838 ** does not do asynchronous io for regular files. Hence,
839 ** for the time being, we fill up the v_data field with the
840 ** vnode pointer itself. */
841 tvc->v.v_data = (char *)tvc;
842 #endif /* AFS_SUN55_ENV */
844 afs_BozonInit(&tvc->pvnLock, tvc);
848 tvc->callback = serverp; /* to minimize chance that clear
850 /* initialize vnode data, note vrefCount is v.v_count */
852 /* Don't forget to free the gnode space */
853 tvc->v.v_gnode = gnodepnt = (struct gnode *) osi_AllocSmallSpace(sizeof(struct gnode));
854 memset((char *)gnodepnt, 0, sizeof(struct gnode));
857 memset((void*)&(tvc->vc_bhv_desc), 0, sizeof(tvc->vc_bhv_desc));
858 bhv_desc_init(&(tvc->vc_bhv_desc), tvc, tvc, &Afs_vnodeops);
860 vn_bhv_head_init(&(tvc->v.v_bh), "afsvp");
861 vn_bhv_insert_initial(&(tvc->v.v_bh), &(tvc->vc_bhv_desc));
863 bhv_head_init(&(tvc->v.v_bh));
864 bhv_insert_initial(&(tvc->v.v_bh), &(tvc->vc_bhv_desc));
867 tvc->v.v_mreg = tvc->v.v_mregb = (struct pregion*)tvc;
869 tvc->v.v_trace = ktrace_alloc(VNODE_TRACE_SIZE, 0);
871 init_bitlock(&tvc->v.v_pcacheflag, VNODE_PCACHE_LOCKBIT, "afs_pcache",
873 init_mutex(&tvc->v.v_filocksem, MUTEX_DEFAULT, "afsvfl", (long)tvc);
874 init_mutex(&tvc->v.v_buf_lock, MUTEX_DEFAULT, "afsvnbuf", (long)tvc);
876 vnode_pcache_init(&tvc->v);
877 #if defined(DEBUG) && defined(VNODE_INIT_BITLOCK)
878 /* Above define is never true execpt in SGI test kernels. */
879 init_bitlock(&(tvc->v.v_flag, VLOCK, "vnode", tvc->v.v_number);
882 AFS_VN_INIT_BUF_LOCK(&(tvc->v));
885 SetAfsVnode((struct vnode *)tvc);
886 #endif /* AFS_SGI64_ENV */
887 #ifdef AFS_DARWIN_ENV
888 tvc->v.v_ubcinfo = UBC_INFO_NULL;
889 lockinit(&tvc->rwlock, PINOD, "vcache rwlock", 0, 0);
890 cache_purge((struct vnode *)tvc);
893 /* VLISTNONE(&tvc->v); */
894 tvc->v.v_freelist.tqe_next=0;
895 tvc->v.v_freelist.tqe_prev=(struct vnode **)0xdeadb;
896 /*tvc->vrefCount++;*/
899 * The proper value for mvstat (for root fids) is setup by the caller.
902 if (afid->Fid.Vnode == 1 && afid->Fid.Unique == 1)
904 if (afs_globalVFS == 0) osi_Panic("afs globalvfs");
905 vSetVfsp(tvc, afs_globalVFS);
908 tvc->v.v_vfsnext = afs_globalVFS->vfs_vnodes; /* link off vfs */
909 tvc->v.v_vfsprev = NULL;
910 afs_globalVFS->vfs_vnodes = &tvc->v;
911 if (tvc->v.v_vfsnext != NULL)
912 tvc->v.v_vfsnext->v_vfsprev = &tvc->v;
913 tvc->v.v_next = gnodepnt->gn_vnode; /*Single vnode per gnode for us!*/
914 gnodepnt->gn_vnode = &tvc->v;
917 tvc->v.g_dev = ((struct mount *)afs_globalVFS->vfs_data)->m_dev;
919 #if defined(AFS_DUX40_ENV)
920 insmntque(tvc, afs_globalVFS, &afs_ubcops);
923 /* Is this needed??? */
924 insmntque(tvc, afs_globalVFS);
925 #endif /* AFS_OSF_ENV */
926 #endif /* AFS_DUX40_ENV */
927 #if defined(AFS_SGI_ENV)
928 VN_SET_DPAGES(&(tvc->v), (struct pfdat*)NULL);
929 osi_Assert((tvc->v.v_flag & VINACT) == 0);
931 osi_Assert(VN_GET_PGCNT(&(tvc->v)) == 0);
932 osi_Assert(tvc->mapcnt == 0 && tvc->vc_locktrips == 0);
933 osi_Assert(tvc->vc_rwlockid == OSI_NO_LOCKID);
934 osi_Assert(tvc->v.v_filocks == NULL);
935 #if !defined(AFS_SGI65_ENV)
936 osi_Assert(tvc->v.v_filocksem == NULL);
938 osi_Assert(tvc->cred == NULL);
940 vnode_pcache_reinit(&tvc->v);
941 tvc->v.v_rdev = NODEV;
943 vn_initlist((struct vnlist *)&tvc->v);
945 #endif /* AFS_SGI_ENV */
946 #if defined(AFS_LINUX22_ENV)
948 struct inode *ip = (struct inode*)tvc;
949 sema_init(&ip->i_sem, 1);
950 #if defined(AFS_LINUX24_ENV)
951 sema_init(&ip->i_zombie, 1);
952 init_waitqueue_head(&ip->i_wait);
953 spin_lock_init(&ip->i_data.i_shared_lock);
954 #ifdef STRUCT_ADDRESS_SPACE_HAS_PAGE_LOCK
955 spin_lock_init(&ip->i_data.page_lock);
957 INIT_LIST_HEAD(&ip->i_data.clean_pages);
958 INIT_LIST_HEAD(&ip->i_data.dirty_pages);
959 INIT_LIST_HEAD(&ip->i_data.locked_pages);
960 INIT_LIST_HEAD(&ip->i_dirty_buffers);
961 ip->i_data.host = (void*) ip;
962 ip->i_mapping = &ip->i_data;
964 sema_init(&ip->i_atomic_write, 1);
965 init_waitqueue(&ip->i_wait);
967 INIT_LIST_HEAD(&ip->i_hash);
968 INIT_LIST_HEAD(&ip->i_dentry);
970 ip->i_dev = afs_globalVFS->s_dev;
971 ip->i_sb = afs_globalVFS;
976 osi_dnlc_purgedp(tvc); /* this may be overkill */
977 memset((char *)&(tvc->quick), 0, sizeof(struct vtodc));
978 memset((char *)&(tvc->callsort), 0, sizeof(struct afs_q));
979 tvc->slocks = (struct SimpleLocks *)0;
982 tvc->hnext = afs_vhashT[i];
984 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
985 refpanic ("NewVCache VLRU inconsistent");
987 QAdd(&VLRU, &tvc->vlruq); /* put in lruq */
988 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
989 refpanic ("NewVCache VLRU inconsistent2");
991 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
992 refpanic ("NewVCache VLRU inconsistent3");
994 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
995 refpanic ("NewVCache VLRU inconsistent4");
1005 * afs_FlushActiveVcaches
1011 * doflocks : Do we handle flocks?
1013 /* LOCK: afs_FlushActiveVcaches afs_xvcache N */
1015 afs_FlushActiveVcaches(doflocks)
1016 register afs_int32 doflocks;
1018 { /*afs_FlushActiveVcaches*/
1020 register struct vcache *tvc;
1022 register struct conn *tc;
1023 register afs_int32 code;
1024 register struct AFS_UCRED *cred;
1025 struct vrequest treq, ureq;
1026 struct AFSVolSync tsync;
1030 AFS_STATCNT(afs_FlushActiveVcaches);
1031 ObtainReadLock(&afs_xvcache);
1032 for(i=0;i<VCSIZE;i++) {
1033 for(tvc = afs_vhashT[i]; tvc; tvc=tvc->hnext) {
1034 if (doflocks && tvc->flockCount != 0) {
1035 /* if this entry has an flock, send a keep-alive call out */
1037 ReleaseReadLock(&afs_xvcache);
1038 ObtainWriteLock(&tvc->lock,51);
1040 afs_InitReq(&treq, &afs_osi_cred);
1041 treq.flags |= O_NONBLOCK;
1043 tc = afs_Conn(&tvc->fid, &treq, SHARED_LOCK);
1045 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_EXTENDLOCK);
1046 #ifdef RX_ENABLE_LOCKS
1048 #endif /* RX_ENABLE_LOCKS */
1050 RXAFS_ExtendLock(tc->id,
1051 (struct AFSFid *) &tvc->fid.Fid,
1053 #ifdef RX_ENABLE_LOCKS
1055 #endif /* RX_ENABLE_LOCKS */
1060 (afs_Analyze(tc, code, &tvc->fid, &treq,
1061 AFS_STATS_FS_RPCIDX_EXTENDLOCK,
1062 SHARED_LOCK, (struct cell *)0));
1064 ReleaseWriteLock(&tvc->lock);
1065 ObtainReadLock(&afs_xvcache);
1069 if ((tvc->states & CCore) || (tvc->states & CUnlinkedDel)) {
1071 * Don't let it evaporate in case someone else is in
1072 * this code. Also, drop the afs_xvcache lock while
1073 * getting vcache locks.
1076 ReleaseReadLock(&afs_xvcache);
1077 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1078 afs_BozonLock(&tvc->pvnLock, tvc);
1080 #if defined(AFS_SGI_ENV)
1082 * That's because if we come in via the CUnlinkedDel bit state path we'll be have 0 refcnt
1084 osi_Assert(VREFCOUNT(tvc) > 0);
1085 AFS_RWLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1087 ObtainWriteLock(&tvc->lock,52);
1088 if (tvc->states & CCore) {
1089 tvc->states &= ~CCore;
1090 /* XXXX Find better place-holder for cred XXXX */
1091 cred = (struct AFS_UCRED *) tvc->linkData;
1092 tvc->linkData = (char *) 0; /* XXX */
1093 afs_InitReq(&ureq, cred);
1094 afs_Trace2(afs_iclSetp, CM_TRACE_ACTCCORE,
1095 ICL_TYPE_POINTER, tvc,
1096 ICL_TYPE_INT32, tvc->execsOrWriters);
1097 code = afs_StoreOnLastReference(tvc, &ureq);
1098 ReleaseWriteLock(&tvc->lock);
1099 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1100 afs_BozonUnlock(&tvc->pvnLock, tvc);
1102 hzero(tvc->flushDV);
1105 if (code && code != VNOVNODE) {
1106 afs_StoreWarn(code, tvc->fid.Fid.Volume,
1107 /* /dev/console */ 1);
1109 } else if (tvc->states & CUnlinkedDel) {
1113 ReleaseWriteLock(&tvc->lock);
1114 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1115 afs_BozonUnlock(&tvc->pvnLock, tvc);
1117 #if defined(AFS_SGI_ENV)
1118 AFS_RWUNLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1120 afs_remunlink(tvc, 0);
1121 #if defined(AFS_SGI_ENV)
1122 AFS_RWLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1126 /* lost (or won, perhaps) the race condition */
1127 ReleaseWriteLock(&tvc->lock);
1128 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1129 afs_BozonUnlock(&tvc->pvnLock, tvc);
1132 #if defined(AFS_SGI_ENV)
1133 AFS_RWUNLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1135 ObtainReadLock(&afs_xvcache);
1141 AFS_RELE((struct vnode *)tvc);
1143 /* Matches write code setting CCore flag */
1147 #ifdef AFS_DARWIN_ENV
1148 if (VREFCOUNT(tvc) == 1 && UBCINFOEXISTS(&tvc->v)) {
1149 if (tvc->opens) panic("flushactive open, hasubc, but refcnt 1");
1150 osi_VM_TryReclaim(tvc,0);
1155 ReleaseReadLock(&afs_xvcache);
1157 } /*afs_FlushActiveVcaches*/
1164 * Make sure a cache entry is up-to-date status-wise.
1166 * NOTE: everywhere that calls this can potentially be sped up
1167 * by checking CStatd first, and avoiding doing the InitReq
1168 * if this is up-to-date.
1170 * Anymore, the only places that call this KNOW already that the
1171 * vcache is not up-to-date, so we don't screw around.
1174 * avc : Ptr to vcache entry to verify.
1178 int afs_VerifyVCache2(struct vcache *avc, struct vrequest *areq)
1180 register struct vcache *tvc;
1182 AFS_STATCNT(afs_VerifyVCache);
1184 #if defined(AFS_OSF_ENV)
1185 ObtainReadLock(&avc->lock);
1186 if (afs_IsWired(avc)) {
1187 ReleaseReadLock(&avc->lock);
1190 ReleaseReadLock(&avc->lock);
1191 #endif /* AFS_OSF_ENV */
1192 /* otherwise we must fetch the status info */
1194 ObtainWriteLock(&avc->lock,53);
1195 if (avc->states & CStatd) {
1196 ReleaseWriteLock(&avc->lock);
1199 ObtainWriteLock(&afs_xcbhash, 461);
1200 avc->states &= ~( CStatd | CUnique );
1201 avc->callback = (struct server *)0;
1202 afs_DequeueCallback(avc);
1203 ReleaseWriteLock(&afs_xcbhash);
1204 ReleaseWriteLock(&avc->lock);
1206 /* since we've been called back, or the callback has expired,
1207 * it's possible that the contents of this directory, or this
1208 * file's name have changed, thus invalidating the dnlc contents.
1210 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
1211 osi_dnlc_purgedp (avc);
1213 osi_dnlc_purgevp (avc);
1215 /* fetch the status info */
1216 tvc = afs_GetVCache(&avc->fid, areq, (afs_int32*)0, avc, READ_LOCK);
1217 if (!tvc) return ENOENT;
1218 /* Put it back; caller has already incremented vrefCount */
1219 afs_PutVCache(tvc, READ_LOCK);
1222 } /*afs_VerifyVCache*/
1229 * Simple copy of stat info into cache.
1232 * avc : Ptr to vcache entry involved.
1233 * astat : Ptr to stat info to copy.
1236 * Nothing interesting.
1238 * Callers: as of 1992-04-29, only called by WriteVCache
1241 afs_SimpleVStat(avc, astat, areq)
1242 register struct vcache *avc;
1243 register struct AFSFetchStatus *astat;
1244 struct vrequest *areq;
1245 { /*afs_SimpleVStat*/
1247 AFS_STATCNT(afs_SimpleVStat);
1250 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1251 && !AFS_VN_MAPPED((vnode_t*)avc))
1253 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc))
1257 #if defined(AFS_SGI_ENV)
1258 osi_Assert((valusema(&avc->vc_rwlock) <= 0) &&
1259 (OSI_GET_LOCKID() == avc->vc_rwlockid));
1260 if (astat->Length < avc->m.Length) {
1261 vnode_t *vp = (vnode_t *)avc;
1263 osi_Assert(WriteLocked(&avc->lock));
1264 ReleaseWriteLock(&avc->lock);
1266 PTOSSVP(vp, (off_t)astat->Length, (off_t)MAXLONG);
1268 ObtainWriteLock(&avc->lock,67);
1271 /* if writing the file, don't fetch over this value */
1272 afs_Trace3(afs_iclSetp, CM_TRACE_SIMPLEVSTAT,
1273 ICL_TYPE_POINTER, avc,
1274 ICL_TYPE_INT32, avc->m.Length,
1275 ICL_TYPE_INT32, astat->Length);
1276 avc->m.Length = astat->Length;
1277 avc->m.Date = astat->ClientModTime;
1279 avc->m.Owner = astat->Owner;
1280 avc->m.Group = astat->Group;
1281 avc->m.Mode = astat->UnixModeBits;
1282 if (vType(avc) == VREG) {
1283 avc->m.Mode |= S_IFREG;
1285 else if (vType(avc) == VDIR) {
1286 avc->m.Mode |= S_IFDIR;
1288 else if (vType(avc) == VLNK) {
1292 avc->m.Mode |= S_IFLNK;
1293 if ((avc->m.Mode & 0111) == 0) avc->mvstat = 1;
1295 if (avc->states & CForeign) {
1296 struct axscache *ac;
1297 avc->anyAccess = astat->AnonymousAccess;
1299 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1301 * Caller has at least one bit not covered by anonymous, and
1302 * thus may have interesting rights.
1304 * HOWEVER, this is a really bad idea, because any access query
1305 * for bits which aren't covered by anonymous, on behalf of a user
1306 * who doesn't have any special rights, will result in an answer of
1307 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1308 * It's an especially bad idea under Ultrix, since (due to the lack of
1309 * a proper access() call) it must perform several afs_access() calls
1310 * in order to create magic mode bits that vary according to who makes
1311 * the call. In other words, _every_ stat() generates a test for
1314 #endif /* badidea */
1315 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1316 ac->axess = astat->CallerAccess;
1317 else /* not found, add a new one if possible */
1318 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1322 } /*afs_SimpleVStat*/
1329 * Store the status info *only* back to the server for a
1333 * avc : Ptr to the vcache entry.
1334 * astatus : Ptr to the status info to store.
1335 * areq : Ptr to the associated vrequest.
1338 * Must be called with a shared lock held on the vnode.
1341 afs_WriteVCache(avc, astatus, areq)
1342 register struct vcache *avc;
1343 register struct AFSStoreStatus *astatus;
1344 struct vrequest *areq;
1346 { /*afs_WriteVCache*/
1349 struct AFSFetchStatus OutStatus;
1350 struct AFSVolSync tsync;
1353 AFS_STATCNT(afs_WriteVCache);
1354 afs_Trace2(afs_iclSetp, CM_TRACE_WVCACHE, ICL_TYPE_POINTER, avc,
1355 ICL_TYPE_INT32, avc->m.Length);
1358 tc = afs_Conn(&avc->fid, areq, SHARED_LOCK);
1360 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STORESTATUS);
1361 #ifdef RX_ENABLE_LOCKS
1363 #endif /* RX_ENABLE_LOCKS */
1364 code = RXAFS_StoreStatus(tc->id,
1365 (struct AFSFid *) &avc->fid.Fid,
1366 astatus, &OutStatus, &tsync);
1367 #ifdef RX_ENABLE_LOCKS
1369 #endif /* RX_ENABLE_LOCKS */
1374 (afs_Analyze(tc, code, &avc->fid, areq,
1375 AFS_STATS_FS_RPCIDX_STORESTATUS,
1376 SHARED_LOCK, (struct cell *)0));
1378 UpgradeSToWLock(&avc->lock,20);
1380 /* success, do the changes locally */
1381 afs_SimpleVStat(avc, &OutStatus, areq);
1383 * Update the date, too. SimpleVStat didn't do this, since
1384 * it thought we were doing this after fetching new status
1385 * over a file being written.
1387 avc->m.Date = OutStatus.ClientModTime;
1390 /* failure, set up to check with server next time */
1391 ObtainWriteLock(&afs_xcbhash, 462);
1392 afs_DequeueCallback(avc);
1393 avc->states &= ~( CStatd | CUnique); /* turn off stat valid flag */
1394 ReleaseWriteLock(&afs_xcbhash);
1395 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
1396 osi_dnlc_purgedp (avc); /* if it (could be) a directory */
1398 ConvertWToSLock(&avc->lock);
1401 } /*afs_WriteVCache*/
1407 * Copy astat block into vcache info
1410 * avc : Ptr to vcache entry.
1411 * astat : Ptr to stat block to copy in.
1412 * areq : Ptr to associated request.
1415 * Must be called under a write lock
1417 * Note: this code may get dataversion and length out of sync if the file has
1418 * been modified. This is less than ideal. I haven't thought about
1419 * it sufficiently to be certain that it is adequate.
1422 afs_ProcessFS(avc, astat, areq)
1423 register struct vcache *avc;
1424 struct vrequest *areq;
1425 register struct AFSFetchStatus *astat;
1430 AFS_STATCNT(afs_ProcessFS);
1432 /* WARNING: afs_DoBulkStat uses the Length field to store a sequence
1433 * number for each bulk status request. Under no circumstances
1434 * should afs_DoBulkStat store a sequence number if the new
1435 * length will be ignored when afs_ProcessFS is called with
1436 * new stats. If you change the following conditional then you
1437 * also need to change the conditional in afs_DoBulkStat. */
1439 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1440 && !AFS_VN_MAPPED((vnode_t*)avc))
1442 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc))
1445 /* if we're writing or mapping this file, don't fetch over these
1448 afs_Trace3(afs_iclSetp, CM_TRACE_PROCESSFS, ICL_TYPE_POINTER, avc,
1449 ICL_TYPE_INT32, avc->m.Length,
1450 ICL_TYPE_INT32, astat->Length);
1451 avc->m.Length = astat->Length;
1452 avc->m.Date = astat->ClientModTime;
1454 hset64(avc->m.DataVersion, astat->dataVersionHigh, astat->DataVersion);
1455 avc->m.Owner = astat->Owner;
1456 avc->m.Mode = astat->UnixModeBits;
1457 avc->m.Group = astat->Group;
1458 avc->m.LinkCount = astat->LinkCount;
1459 if (astat->FileType == File) {
1460 vSetType(avc, VREG);
1461 avc->m.Mode |= S_IFREG;
1463 else if (astat->FileType == Directory) {
1464 vSetType(avc, VDIR);
1465 avc->m.Mode |= S_IFDIR;
1467 else if (astat->FileType == SymbolicLink) {
1468 vSetType(avc, VLNK);
1469 avc->m.Mode |= S_IFLNK;
1470 if ((avc->m.Mode & 0111) == 0) avc->mvstat = 1;
1472 avc->anyAccess = astat->AnonymousAccess;
1474 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1476 * Caller has at least one bit not covered by anonymous, and
1477 * thus may have interesting rights.
1479 * HOWEVER, this is a really bad idea, because any access query
1480 * for bits which aren't covered by anonymous, on behalf of a user
1481 * who doesn't have any special rights, will result in an answer of
1482 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1483 * It's an especially bad idea under Ultrix, since (due to the lack of
1484 * a proper access() call) it must perform several afs_access() calls
1485 * in order to create magic mode bits that vary according to who makes
1486 * the call. In other words, _every_ stat() generates a test for
1489 #endif /* badidea */
1491 struct axscache *ac;
1492 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1493 ac->axess = astat->CallerAccess;
1494 else /* not found, add a new one if possible */
1495 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1498 #ifdef AFS_LINUX22_ENV
1499 vcache2inode(avc); /* Set the inode attr cache */
1505 afs_RemoteLookup(afid, areq, name, nfid, OutStatusp, CallBackp, serverp, tsyncp)
1506 register struct VenusFid *afid;
1507 struct vrequest *areq;
1509 struct VenusFid *nfid;
1510 struct AFSFetchStatus *OutStatusp;
1511 struct AFSCallBack *CallBackp;
1512 struct server **serverp;
1513 struct AFSVolSync *tsyncp;
1516 register struct vcache *tvc;
1519 register struct conn *tc;
1520 struct AFSFetchStatus OutDirStatus;
1523 if (!name) name = ""; /* XXX */
1525 tc = afs_Conn(afid, areq, SHARED_LOCK);
1527 if (serverp) *serverp = tc->srvr->server;
1529 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_XLOOKUP);
1530 #ifdef RX_ENABLE_LOCKS
1532 #endif /* RX_ENABLE_LOCKS */
1533 code = RXAFS_Lookup(tc->id, (struct AFSFid *) &afid->Fid, name,
1534 (struct AFSFid *) &nfid->Fid,
1535 OutStatusp, &OutDirStatus, CallBackp, tsyncp);
1536 #ifdef RX_ENABLE_LOCKS
1538 #endif /* RX_ENABLE_LOCKS */
1543 (afs_Analyze(tc, code, afid, areq,
1544 AFS_STATS_FS_RPCIDX_XLOOKUP,
1545 SHARED_LOCK, (struct cell *)0));
1555 * Given a file id and a vrequest structure, fetch the status
1556 * information associated with the file.
1560 * areq : Ptr to associated vrequest structure, specifying the
1561 * user whose authentication tokens will be used.
1562 * avc : caller may already have a vcache for this file, which is
1566 * The cache entry is returned with an increased vrefCount field.
1567 * The entry must be discarded by calling afs_PutVCache when you
1568 * are through using the pointer to the cache entry.
1570 * You should not hold any locks when calling this function, except
1571 * locks on other vcache entries. If you lock more than one vcache
1572 * entry simultaneously, you should lock them in this order:
1574 * 1. Lock all files first, then directories.
1575 * 2. Within a particular type, lock entries in Fid.Vnode order.
1577 * This locking hierarchy is convenient because it allows locking
1578 * of a parent dir cache entry, given a file (to check its access
1579 * control list). It also allows renames to be handled easily by
1580 * locking directories in a constant order.
1581 * NB. NewVCache -> FlushVCache presently (4/10/95) drops the xvcache lock.
1583 struct vcache *afs_GetVCache(afid, areq, cached, avc, locktype)
1584 register struct VenusFid *afid;
1585 struct vrequest *areq;
1588 struct vcache *avc; /* might have a vcache structure already, which must
1589 * already be held by the caller */
1592 afs_int32 code, i, newvcache=0;
1593 register struct vcache *tvc;
1597 AFS_STATCNT(afs_GetVCache);
1599 if (cached) *cached = 0; /* Init just in case */
1602 ObtainSharedLock(&afs_xvcache,5);
1604 tvc = afs_FindVCache(afid, 0, 0, &retry, DO_STATS | DO_VLRU );
1606 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1607 ReleaseSharedLock(&afs_xvcache);
1608 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1616 if (tvc->states & CStatd) {
1617 ReleaseSharedLock(&afs_xvcache);
1622 UpgradeSToWLock(&afs_xvcache,21);
1624 /* no cache entry, better grab one */
1625 tvc = afs_NewVCache(afid, (struct server *)0, 1, WRITE_LOCK);
1628 ConvertWToSLock(&afs_xvcache);
1629 afs_stats_cmperf.vcacheMisses++;
1632 ReleaseSharedLock(&afs_xvcache);
1634 ObtainWriteLock(&tvc->lock,54);
1636 if (tvc->states & CStatd) {
1637 #ifdef AFS_LINUX22_ENV
1640 ReleaseWriteLock(&tvc->lock);
1641 #ifdef AFS_DARWIN_ENV
1647 #if defined(AFS_OSF_ENV)
1648 if (afs_IsWired(tvc)) {
1649 ReleaseWriteLock(&tvc->lock);
1652 #endif /* AFS_OSF_ENV */
1654 ObtainWriteLock(&afs_xcbhash, 464);
1655 tvc->states &= ~CUnique;
1657 afs_DequeueCallback(tvc);
1658 ReleaseWriteLock(&afs_xcbhash);
1660 /* It is always appropriate to throw away all the access rights? */
1661 afs_FreeAllAxs(&(tvc->Access));
1662 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-volume info */
1664 if ((tvp->states & VForeign)) {
1665 if (newvcache) tvc->states |= CForeign;
1666 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
1667 && (tvp->rootUnique == afid->Fid.Unique)) {
1671 if (tvp->states & VRO) tvc->states |= CRO;
1672 if (tvp->states & VBackup) tvc->states |= CBackup;
1673 /* now copy ".." entry back out of volume structure, if necessary */
1674 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
1676 tvc->mvid = (struct VenusFid *)
1677 osi_AllocSmallSpace(sizeof(struct VenusFid));
1678 *tvc->mvid = tvp->dotdot;
1680 afs_PutVolume(tvp, READ_LOCK);
1684 afs_RemoveVCB(afid);
1686 struct AFSFetchStatus OutStatus;
1687 code = afs_FetchStatus(tvc, afid, areq, &OutStatus);
1691 ReleaseWriteLock(&tvc->lock);
1693 ObtainReadLock(&afs_xvcache);
1695 ReleaseReadLock(&afs_xvcache);
1696 return (struct vcache *) 0;
1699 ReleaseWriteLock(&tvc->lock);
1700 #ifdef AFS_DARWIN_ENV
1709 struct vcache *afs_LookupVCache(struct VenusFid *afid, struct vrequest *areq,
1710 afs_int32 *cached, afs_int32 locktype,
1711 struct vcache *adp, char *aname)
1713 afs_int32 code, now, newvcache=0, hash;
1714 struct VenusFid nfid;
1715 register struct vcache *tvc;
1717 struct AFSFetchStatus OutStatus;
1718 struct AFSCallBack CallBack;
1719 struct AFSVolSync tsync;
1720 struct server *serverp = 0;
1724 AFS_STATCNT(afs_GetVCache);
1725 if (cached) *cached = 0; /* Init just in case */
1728 ObtainReadLock(&afs_xvcache);
1729 tvc = afs_FindVCache(afid, 0, 0, &retry, DO_STATS /* no vlru */);
1732 ReleaseReadLock(&afs_xvcache);
1734 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1735 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1739 ObtainReadLock(&tvc->lock);
1741 if (tvc->states & CStatd) {
1745 ReleaseReadLock(&tvc->lock);
1748 tvc->states &= ~CUnique;
1750 ReleaseReadLock(&tvc->lock);
1751 ObtainReadLock(&afs_xvcache);
1755 ReleaseReadLock(&afs_xvcache);
1757 /* lookup the file */
1760 origCBs = afs_allCBs; /* if anything changes, we don't have a cb */
1761 code = afs_RemoteLookup(&adp->fid, areq, aname, &nfid, &OutStatus, &CallBack,
1765 ObtainSharedLock(&afs_xvcache,6);
1766 tvc = afs_FindVCache(&nfid, 0, 0, &retry, DO_VLRU /* no xstats now*/);
1768 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1769 ReleaseSharedLock(&afs_xvcache);
1770 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1776 /* no cache entry, better grab one */
1777 UpgradeSToWLock(&afs_xvcache,22);
1778 tvc = afs_NewVCache(&nfid, (struct server *)0, 1, WRITE_LOCK);
1780 ConvertWToSLock(&afs_xvcache);
1783 ReleaseSharedLock(&afs_xvcache);
1784 ObtainWriteLock(&tvc->lock,55);
1786 /* It is always appropriate to throw away all the access rights? */
1787 afs_FreeAllAxs(&(tvc->Access));
1788 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-vol info */
1790 if ((tvp->states & VForeign)) {
1791 if (newvcache) tvc->states |= CForeign;
1792 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
1793 && (tvp->rootUnique == afid->Fid.Unique))
1796 if (tvp->states & VRO) tvc->states |= CRO;
1797 if (tvp->states & VBackup) tvc->states |= CBackup;
1798 /* now copy ".." entry back out of volume structure, if necessary */
1799 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
1801 tvc->mvid = (struct VenusFid *)
1802 osi_AllocSmallSpace(sizeof(struct VenusFid));
1803 *tvc->mvid = tvp->dotdot;
1808 ObtainWriteLock(&afs_xcbhash, 465);
1809 afs_DequeueCallback(tvc);
1810 tvc->states &= ~( CStatd | CUnique );
1811 ReleaseWriteLock(&afs_xcbhash);
1812 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
1813 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
1815 afs_PutVolume(tvp, READ_LOCK);
1816 ReleaseWriteLock(&tvc->lock);
1817 ObtainReadLock(&afs_xvcache);
1819 ReleaseReadLock(&afs_xvcache);
1820 return (struct vcache *) 0;
1823 ObtainWriteLock(&afs_xcbhash, 466);
1824 if (origCBs == afs_allCBs) {
1825 if (CallBack.ExpirationTime) {
1826 tvc->callback = serverp;
1827 tvc->cbExpires = CallBack.ExpirationTime+now;
1828 tvc->states |= CStatd | CUnique;
1829 tvc->states &= ~CBulkFetching;
1830 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvp);
1831 } else if (tvc->states & CRO) {
1832 /* adapt gives us an hour. */
1833 tvc->cbExpires = 3600+osi_Time(); /*XXX*/
1834 tvc->states |= CStatd | CUnique;
1835 tvc->states &= ~CBulkFetching;
1836 afs_QueueCallback(tvc, CBHash(3600), tvp);
1838 tvc->callback = (struct server *)0;
1839 afs_DequeueCallback(tvc);
1840 tvc->states &= ~(CStatd | CUnique);
1841 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
1842 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
1845 afs_DequeueCallback(tvc);
1846 tvc->states &= ~CStatd;
1847 tvc->states &= ~CUnique;
1848 tvc->callback = (struct server *)0;
1849 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
1850 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
1852 ReleaseWriteLock(&afs_xcbhash);
1854 afs_PutVolume(tvp, READ_LOCK);
1855 afs_ProcessFS(tvc, &OutStatus, areq);
1857 ReleaseWriteLock(&tvc->lock);
1858 #ifdef AFS_DARWIN_ENV
1865 struct vcache *afs_GetRootVCache(struct VenusFid *afid,
1866 struct vrequest *areq, afs_int32 *cached,
1867 struct volume *tvolp, afs_int32 locktype)
1869 afs_int32 code, i, newvcache = 0, haveStatus = 0;
1870 afs_int32 getNewFid = 0;
1872 struct VenusFid nfid;
1873 register struct vcache *tvc;
1874 struct server *serverp = 0;
1875 struct AFSFetchStatus OutStatus;
1876 struct AFSCallBack CallBack;
1877 struct AFSVolSync tsync;
1883 if (!tvolp->rootVnode || getNewFid) {
1884 struct VenusFid tfid;
1887 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
1888 origCBs = afs_allCBs; /* ignore InitCallBackState */
1889 code = afs_RemoteLookup(&tfid, areq, (char *)0, &nfid,
1890 &OutStatus, &CallBack, &serverp, &tsync);
1892 return (struct vcache *)0;
1894 /* ReleaseReadLock(&tvolp->lock); */
1895 ObtainWriteLock(&tvolp->lock,56);
1896 tvolp->rootVnode = afid->Fid.Vnode = nfid.Fid.Vnode;
1897 tvolp->rootUnique = afid->Fid.Unique = nfid.Fid.Unique;
1898 ReleaseWriteLock(&tvolp->lock);
1899 /* ObtainReadLock(&tvolp->lock);*/
1902 afid->Fid.Vnode = tvolp->rootVnode;
1903 afid->Fid.Unique = tvolp->rootUnique;
1906 ObtainSharedLock(&afs_xvcache,7);
1908 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
1909 if (!FidCmp(&(tvc->fid), afid)) {
1911 /* Grab this vnode, possibly reactivating from the free list */
1912 /* for the present (95.05.25) everything on the hash table is
1913 * definitively NOT in the free list -- at least until afs_reclaim
1914 * can be safely implemented */
1917 vg = vget((struct vnode *)tvc); /* this bumps ref count */
1921 #endif /* AFS_OSF_ENV */
1926 if (!haveStatus && (!tvc || !(tvc->states & CStatd))) {
1927 /* Mount point no longer stat'd or unknown. FID may have changed. */
1932 tvc = (struct vcache*)0;
1934 ReleaseSharedLock(&afs_xvcache);
1939 UpgradeSToWLock(&afs_xvcache,23);
1940 /* no cache entry, better grab one */
1941 tvc = afs_NewVCache(afid, (struct server *)0, 1, WRITE_LOCK);
1943 afs_stats_cmperf.vcacheMisses++;
1946 if (cached) *cached = 1;
1947 afs_stats_cmperf.vcacheHits++;
1949 /* we already bumped the ref count in the for loop above */
1950 #else /* AFS_OSF_ENV */
1953 UpgradeSToWLock(&afs_xvcache,24);
1954 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
1955 refpanic ("GRVC VLRU inconsistent0");
1957 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
1958 refpanic ("GRVC VLRU inconsistent1");
1960 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
1961 refpanic ("GRVC VLRU inconsistent2");
1963 QRemove(&tvc->vlruq); /* move to lruq head */
1964 QAdd(&VLRU, &tvc->vlruq);
1965 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
1966 refpanic ("GRVC VLRU inconsistent3");
1968 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
1969 refpanic ("GRVC VLRU inconsistent4");
1971 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
1972 refpanic ("GRVC VLRU inconsistent5");
1977 ReleaseWriteLock(&afs_xvcache);
1979 if (tvc->states & CStatd) {
1983 ObtainReadLock(&tvc->lock);
1984 tvc->states &= ~CUnique;
1985 tvc->callback = (struct server *)0; /* redundant, perhaps */
1986 ReleaseReadLock(&tvc->lock);
1989 ObtainWriteLock(&tvc->lock,57);
1991 /* It is always appropriate to throw away all the access rights? */
1992 afs_FreeAllAxs(&(tvc->Access));
1994 if (newvcache) tvc->states |= CForeign;
1995 if (tvolp->states & VRO) tvc->states |= CRO;
1996 if (tvolp->states & VBackup) tvc->states |= CBackup;
1997 /* now copy ".." entry back out of volume structure, if necessary */
1998 if (newvcache && (tvolp->rootVnode == afid->Fid.Vnode)
1999 && (tvolp->rootUnique == afid->Fid.Unique)) {
2002 if (tvc->mvstat == 2 && tvolp->dotdot.Fid.Volume != 0) {
2004 tvc->mvid = (struct VenusFid *)osi_AllocSmallSpace(sizeof(struct VenusFid));
2005 *tvc->mvid = tvolp->dotdot;
2009 afs_RemoveVCB(afid);
2012 struct VenusFid tfid;
2015 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
2016 origCBs = afs_allCBs; /* ignore InitCallBackState */
2017 code = afs_RemoteLookup(&tfid, areq, (char *)0, &nfid, &OutStatus,
2018 &CallBack, &serverp, &tsync);
2022 ObtainWriteLock(&afs_xcbhash, 467);
2023 afs_DequeueCallback(tvc);
2024 tvc->callback = (struct server *)0;
2025 tvc->states &= ~(CStatd|CUnique);
2026 ReleaseWriteLock(&afs_xcbhash);
2027 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2028 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2029 ReleaseWriteLock(&tvc->lock);
2030 ObtainReadLock(&afs_xvcache);
2032 ReleaseReadLock(&afs_xvcache);
2033 return (struct vcache *) 0;
2036 ObtainWriteLock(&afs_xcbhash, 468);
2037 if (origCBs == afs_allCBs) {
2038 tvc->states |= CTruth;
2039 tvc->callback = serverp;
2040 if (CallBack.ExpirationTime != 0) {
2041 tvc->cbExpires = CallBack.ExpirationTime+start;
2042 tvc->states |= CStatd;
2043 tvc->states &= ~CBulkFetching;
2044 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvolp);
2045 } else if (tvc->states & CRO) {
2046 /* adapt gives us an hour. */
2047 tvc->cbExpires = 3600+osi_Time(); /*XXX*/
2048 tvc->states |= CStatd;
2049 tvc->states &= ~CBulkFetching;
2050 afs_QueueCallback(tvc, CBHash(3600), tvolp);
2053 afs_DequeueCallback(tvc);
2054 tvc->callback = (struct server *)0;
2055 tvc->states &= ~(CStatd | CUnique);
2056 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2057 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2059 ReleaseWriteLock(&afs_xcbhash);
2060 afs_ProcessFS(tvc, &OutStatus, areq);
2062 ReleaseWriteLock(&tvc->lock);
2069 * must be called with avc write-locked
2070 * don't absolutely have to invalidate the hint unless the dv has
2071 * changed, but be sure to get it right else there will be consistency bugs.
2073 afs_int32 afs_FetchStatus(struct vcache *avc, struct VenusFid *afid,
2074 struct vrequest *areq, struct AFSFetchStatus *Outsp)
2078 register struct conn *tc;
2079 struct AFSCallBack CallBack;
2080 struct AFSVolSync tsync;
2081 struct volume* volp;
2085 tc = afs_Conn(afid, areq, SHARED_LOCK);
2086 avc->quick.stamp = 0; avc->h1.dchint = NULL; /* invalidate hints */
2088 avc->callback = tc->srvr->server;
2090 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_FETCHSTATUS);
2091 #ifdef RX_ENABLE_LOCKS
2093 #endif /* RX_ENABLE_LOCKS */
2094 code = RXAFS_FetchStatus(tc->id,
2095 (struct AFSFid *) &afid->Fid,
2096 Outsp, &CallBack, &tsync);
2097 #ifdef RX_ENABLE_LOCKS
2099 #endif /* RX_ENABLE_LOCKS */
2106 (afs_Analyze(tc, code, afid, areq,
2107 AFS_STATS_FS_RPCIDX_FETCHSTATUS,
2108 SHARED_LOCK, (struct cell *)0));
2111 afs_ProcessFS(avc, Outsp, areq);
2112 volp = afs_GetVolume(afid, areq, READ_LOCK);
2113 ObtainWriteLock(&afs_xcbhash, 469);
2114 avc->states |= CTruth;
2115 if (avc->callback /* check for race */) {
2116 if (CallBack.ExpirationTime != 0) {
2117 avc->cbExpires = CallBack.ExpirationTime+start;
2118 avc->states |= CStatd;
2119 avc->states &= ~CBulkFetching;
2120 afs_QueueCallback(avc, CBHash(CallBack.ExpirationTime), volp);
2122 else if (avc->states & CRO)
2123 { /* ordinary callback on a read-only volume -- AFS 3.2 style */
2124 avc->cbExpires = 3600+start;
2125 avc->states |= CStatd;
2126 avc->states &= ~CBulkFetching;
2127 afs_QueueCallback(avc, CBHash(3600), volp);
2130 afs_DequeueCallback(avc);
2131 avc->callback = (struct server *)0;
2132 avc->states &= ~(CStatd|CUnique);
2133 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
2134 osi_dnlc_purgedp (avc); /* if it (could be) a directory */
2138 afs_DequeueCallback(avc);
2139 avc->callback = (struct server *)0;
2140 avc->states &= ~(CStatd|CUnique);
2141 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
2142 osi_dnlc_purgedp (avc); /* if it (could be) a directory */
2144 ReleaseWriteLock(&afs_xcbhash);
2146 afs_PutVolume(volp, READ_LOCK);
2148 else { /* used to undo the local callback, but that's too extreme.
2149 * There are plenty of good reasons that fetchstatus might return
2150 * an error, such as EPERM. If we have the vnode cached, statd,
2151 * with callback, might as well keep track of the fact that we
2152 * don't have access...
2154 if (code == EPERM || code == EACCES) {
2155 struct axscache *ac;
2156 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
2158 else /* not found, add a new one if possible */
2159 afs_AddAxs(avc->Access, areq->uid, 0);
2170 * Stuff some information into the vcache for the given file.
2173 * afid : File in question.
2174 * OutStatus : Fetch status on the file.
2175 * CallBack : Callback info.
2176 * tc : RPC connection involved.
2177 * areq : vrequest involved.
2180 * Nothing interesting.
2183 afs_StuffVcache(afid, OutStatus, CallBack, tc, areq)
2184 register struct VenusFid *afid;
2185 struct AFSFetchStatus *OutStatus;
2186 struct AFSCallBack *CallBack;
2187 register struct conn *tc;
2188 struct vrequest *areq;
2190 { /*afs_StuffVcache*/
2192 register afs_int32 code, i, newvcache=0;
2193 register struct vcache *tvc;
2194 struct AFSVolSync tsync;
2196 struct axscache *ac;
2199 AFS_STATCNT(afs_StuffVcache);
2200 #ifdef IFS_VCACHECOUNT
2205 ObtainSharedLock(&afs_xvcache,8);
2207 tvc = afs_FindVCache(afid, 0, 0, &retry, DO_VLRU /* no stats */);
2209 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2210 ReleaseSharedLock(&afs_xvcache);
2211 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2217 /* no cache entry, better grab one */
2218 UpgradeSToWLock(&afs_xvcache,25);
2219 tvc = afs_NewVCache(afid, (struct server *)0, 1, WRITE_LOCK);
2221 ConvertWToSLock(&afs_xvcache);
2224 ReleaseSharedLock(&afs_xvcache);
2225 ObtainWriteLock(&tvc->lock,58);
2227 tvc->states &= ~CStatd;
2228 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2229 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2231 /* Is it always appropriate to throw away all the access rights? */
2232 afs_FreeAllAxs(&(tvc->Access));
2234 /*Copy useful per-volume info*/
2235 tvp = afs_GetVolume(afid, areq, READ_LOCK);
2237 if (newvcache && (tvp->states & VForeign)) tvc->states |= CForeign;
2238 if (tvp->states & VRO) tvc->states |= CRO;
2239 if (tvp->states & VBackup) tvc->states |= CBackup;
2241 * Now, copy ".." entry back out of volume structure, if
2244 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
2245 if (!tvc->mvid) tvc->mvid =
2246 (struct VenusFid *) osi_AllocSmallSpace(sizeof(struct VenusFid));
2247 *tvc->mvid = tvp->dotdot;
2250 /* store the stat on the file */
2251 afs_RemoveVCB(afid);
2252 afs_ProcessFS(tvc, OutStatus, areq);
2253 tvc->callback = tc->srvr->server;
2255 /* we use osi_Time twice below. Ideally, we would use the time at which
2256 * the FetchStatus call began, instead, but we don't have it here. So we
2257 * make do with "now". In the CRO case, it doesn't really matter. In
2258 * the other case, we hope that the difference between "now" and when the
2259 * call actually began execution on the server won't be larger than the
2260 * padding which the server keeps. Subtract 1 second anyway, to be on
2261 * the safe side. Can't subtract more because we don't know how big
2262 * ExpirationTime is. Possible consistency problems may arise if the call
2263 * timeout period becomes longer than the server's expiration padding. */
2264 ObtainWriteLock(&afs_xcbhash, 470);
2265 if (CallBack->ExpirationTime != 0) {
2266 tvc->cbExpires = CallBack->ExpirationTime+osi_Time()-1;
2267 tvc->states |= CStatd;
2268 tvc->states &= ~CBulkFetching;
2269 afs_QueueCallback(tvc, CBHash(CallBack->ExpirationTime), tvp);
2271 else if (tvc->states & CRO) {
2272 /* old-fashioned AFS 3.2 style */
2273 tvc->cbExpires = 3600+osi_Time(); /*XXX*/
2274 tvc->states |= CStatd;
2275 tvc->states &= ~CBulkFetching;
2276 afs_QueueCallback(tvc, CBHash(3600), tvp);
2279 afs_DequeueCallback(tvc);
2280 tvc->callback = (struct server *)0;
2281 tvc->states &= ~(CStatd|CUnique);
2282 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2283 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2285 ReleaseWriteLock(&afs_xcbhash);
2287 afs_PutVolume(tvp, READ_LOCK);
2289 /* look in per-pag cache */
2290 if (tvc->Access && (ac = afs_FindAxs(tvc->Access, areq->uid)))
2291 ac->axess = OutStatus->CallerAccess; /* substitute pags */
2292 else /* not found, add a new one if possible */
2293 afs_AddAxs(tvc->Access, areq->uid, OutStatus->CallerAccess);
2295 ReleaseWriteLock(&tvc->lock);
2296 afs_Trace4(afs_iclSetp, CM_TRACE_STUFFVCACHE, ICL_TYPE_POINTER, tvc,
2297 ICL_TYPE_POINTER, tvc->callback, ICL_TYPE_INT32, tvc->cbExpires,
2298 ICL_TYPE_INT32, tvc->cbExpires-osi_Time());
2300 * Release ref count... hope this guy stays around...
2302 afs_PutVCache(tvc, WRITE_LOCK);
2303 } /*afs_StuffVcache*/
2310 * Decrements the reference count on a cache entry.
2313 * avc : Pointer to the cache entry to decrement.
2316 * Nothing interesting.
2319 afs_PutVCache(avc, locktype)
2320 register struct vcache *avc;
2324 AFS_STATCNT(afs_PutVCache);
2326 * Can we use a read lock here?
2328 ObtainReadLock(&afs_xvcache);
2330 ReleaseReadLock(&afs_xvcache);
2337 * Find a vcache entry given a fid.
2340 * afid : Pointer to the fid whose cache entry we desire.
2341 * retry: (SGI-specific) tell the caller to drop the lock on xvcache,
2342 * unlock the vnode, and try again.
2343 * flags: bit 1 to specify whether to compute hit statistics. Not
2344 * set if FindVCache is called as part of internal bookkeeping.
2347 * Must be called with the afs_xvcache lock at least held at
2348 * the read level. In order to do the VLRU adjustment, the xvcache lock
2349 * must be shared-- we upgrade it here.
2352 struct vcache *afs_FindVCache(struct VenusFid *afid, afs_int32 lockit,
2353 afs_int32 locktype, afs_int32 *retry, afs_int32 flag)
2356 register struct vcache *tvc;
2359 AFS_STATCNT(afs_FindVCache);
2362 for(tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2363 if (FidMatches(afid, tvc)) {
2365 /* Grab this vnode, possibly reactivating from the free list */
2368 vg = vget((struct vnode *)tvc);
2372 #endif /* AFS_OSF_ENV */
2377 /* should I have a read lock on the vnode here? */
2379 if (retry) *retry = 0;
2380 #if !defined(AFS_OSF_ENV)
2381 osi_vnhold(tvc, retry); /* already held, above */
2382 if (retry && *retry)
2386 * only move to front of vlru if we have proper vcache locking)
2388 if (flag & DO_VLRU) {
2389 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2390 refpanic ("FindVC VLRU inconsistent1");
2392 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2393 refpanic ("FindVC VLRU inconsistent1");
2395 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2396 refpanic ("FindVC VLRU inconsistent2");
2398 UpgradeSToWLock(&afs_xvcache,26);
2399 QRemove(&tvc->vlruq);
2400 QAdd(&VLRU, &tvc->vlruq);
2401 ConvertWToSLock(&afs_xvcache);
2402 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2403 refpanic ("FindVC VLRU inconsistent1");
2405 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2406 refpanic ("FindVC VLRU inconsistent2");
2408 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2409 refpanic ("FindVC VLRU inconsistent3");
2415 if (flag & DO_STATS) {
2416 if (tvc) afs_stats_cmperf.vcacheHits++;
2417 else afs_stats_cmperf.vcacheMisses++;
2418 if (afid->Cell == LOCALCELL)
2419 afs_stats_cmperf.vlocalAccesses++;
2421 afs_stats_cmperf.vremoteAccesses++;
2424 #ifdef AFS_LINUX22_ENV
2425 if (tvc && (tvc->states & CStatd))
2426 vcache2inode(tvc); /* mainly to reset i_nlink */
2428 #ifdef AFS_DARWIN_ENV
2433 } /*afs_FindVCache*/
2439 * Find a vcache entry given a fid. Does a wildcard match on what we
2440 * have for the fid. If more than one entry, don't return anything.
2443 * avcp : Fill in pointer if we found one and only one.
2444 * afid : Pointer to the fid whose cache entry we desire.
2445 * retry: (SGI-specific) tell the caller to drop the lock on xvcache,
2446 * unlock the vnode, and try again.
2447 * flags: bit 1 to specify whether to compute hit statistics. Not
2448 * set if FindVCache is called as part of internal bookkeeping.
2451 * Must be called with the afs_xvcache lock at least held at
2452 * the read level. In order to do the VLRU adjustment, the xvcache lock
2453 * must be shared-- we upgrade it here.
2456 * number of matches found.
2459 int afs_duplicate_nfs_fids=0;
2461 afs_int32 afs_NFSFindVCache(avcp, afid, lockit)
2462 struct vcache **avcp;
2463 struct VenusFid *afid;
2465 { /*afs_FindVCache*/
2467 register struct vcache *tvc;
2469 afs_int32 retry = 0;
2470 afs_int32 count = 0;
2471 struct vcache *found_tvc = NULL;
2473 AFS_STATCNT(afs_FindVCache);
2477 ObtainSharedLock(&afs_xvcache,331);
2480 for(tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2481 /* Match only on what we have.... */
2482 if (((tvc->fid.Fid.Vnode & 0xffff) == afid->Fid.Vnode)
2483 && (tvc->fid.Fid.Volume == afid->Fid.Volume)
2484 && ((tvc->fid.Fid.Unique & 0xffffff) == afid->Fid.Unique)
2485 && (tvc->fid.Cell == afid->Cell)) {
2487 /* Grab this vnode, possibly reactivating from the free list */
2490 vg = vget((struct vnode *)tvc);
2493 /* This vnode no longer exists. */
2496 #endif /* AFS_OSF_ENV */
2501 /* Drop our reference counts. */
2502 vrele((struct vnode *)tvc);
2503 vrele((struct vnode *)found_tvc);
2505 afs_duplicate_nfs_fids++;
2506 ReleaseSharedLock(&afs_xvcache);
2514 /* should I have a read lock on the vnode here? */
2516 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2517 osi_vnhold(tvc, &retry);
2520 found_tvc = (struct vcache*)0;
2521 ReleaseSharedLock(&afs_xvcache);
2522 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2526 #if !defined(AFS_OSF_ENV)
2527 osi_vnhold(tvc, (int*)0); /* already held, above */
2531 * We obtained the xvcache lock above.
2533 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2534 refpanic ("FindVC VLRU inconsistent1");
2536 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2537 refpanic ("FindVC VLRU inconsistent1");
2539 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2540 refpanic ("FindVC VLRU inconsistent2");
2542 UpgradeSToWLock(&afs_xvcache,568);
2543 QRemove(&tvc->vlruq);
2544 QAdd(&VLRU, &tvc->vlruq);
2545 ConvertWToSLock(&afs_xvcache);
2546 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2547 refpanic ("FindVC VLRU inconsistent1");
2549 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2550 refpanic ("FindVC VLRU inconsistent2");
2552 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2553 refpanic ("FindVC VLRU inconsistent3");
2558 if (tvc) afs_stats_cmperf.vcacheHits++;
2559 else afs_stats_cmperf.vcacheMisses++;
2560 if (afid->Cell == LOCALCELL)
2561 afs_stats_cmperf.vlocalAccesses++;
2563 afs_stats_cmperf.vremoteAccesses++;
2565 *avcp = tvc; /* May be null */
2567 ReleaseSharedLock(&afs_xvcache);
2568 return (tvc ? 1 : 0);
2570 } /*afs_NFSFindVCache*/
2578 * Initialize vcache related variables
2580 void afs_vcacheInit(int astatSize)
2582 register struct vcache *tvp;
2584 #if defined(AFS_OSF_ENV)
2585 if (!afs_maxvcount) {
2586 #if defined(AFS_OSF30_ENV)
2587 afs_maxvcount = max_vnodes/2; /* limit ourselves to half the total */
2589 afs_maxvcount = nvnode/2; /* limit ourselves to half the total */
2591 if (astatSize < afs_maxvcount) {
2592 afs_maxvcount = astatSize;
2595 #else /* AFS_OSF_ENV */
2596 freeVCList = (struct vcache *)0;
2599 RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
2600 LOCK_INIT(&afs_xvcb, "afs_xvcb");
2602 #if !defined(AFS_OSF_ENV)
2603 /* Allocate and thread the struct vcache entries */
2604 tvp = (struct vcache *) afs_osi_Alloc(astatSize * sizeof(struct vcache));
2605 memset((char *)tvp, 0, sizeof(struct vcache)*astatSize);
2607 Initial_freeVCList = tvp;
2608 freeVCList = &(tvp[0]);
2609 for(i=0; i < astatSize-1; i++) {
2610 tvp[i].nextfree = &(tvp[i+1]);
2612 tvp[astatSize-1].nextfree = (struct vcache *) 0;
2613 #ifdef AFS_AIX32_ENV
2614 pin((char *)tvp, astatSize * sizeof(struct vcache)); /* XXX */
2619 #if defined(AFS_SGI_ENV)
2620 for(i=0; i < astatSize; i++) {
2621 char name[METER_NAMSZ];
2622 struct vcache *tvc = &tvp[i];
2624 tvc->v.v_number = ++afsvnumbers;
2625 tvc->vc_rwlockid = OSI_NO_LOCKID;
2626 initnsema(&tvc->vc_rwlock, 1, makesname(name, "vrw", tvc->v.v_number));
2627 #ifndef AFS_SGI53_ENV
2628 initnsema(&tvc->v.v_sync, 0, makesname(name, "vsy", tvc->v.v_number));
2630 #ifndef AFS_SGI62_ENV
2631 initnlock(&tvc->v.v_lock, makesname(name, "vlk", tvc->v.v_number));
2632 #endif /* AFS_SGI62_ENV */
2645 void shutdown_vcache(void)
2648 struct afs_cbr *tsp, *nsp;
2650 * XXX We may potentially miss some of the vcaches because if when there're no
2651 * free vcache entries and all the vcache entries are active ones then we allocate
2652 * an additional one - admittedly we almost never had that occur.
2654 #if !defined(AFS_OSF_ENV)
2655 afs_osi_Free(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
2657 #ifdef AFS_AIX32_ENV
2658 unpin(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
2662 register struct afs_q *tq, *uq;
2663 register struct vcache *tvc;
2664 for (tq = VLRU.prev; tq != &VLRU; tq = uq) {
2668 osi_FreeSmallSpace(tvc->mvid);
2669 tvc->mvid = (struct VenusFid*)0;
2672 aix_gnode_rele((struct vnode *)tvc);
2674 if (tvc->linkData) {
2675 afs_osi_Free(tvc->linkData, strlen(tvc->linkData)+1);
2680 * Also free the remaining ones in the Cache
2682 for (i=0; i < VCSIZE; i++) {
2683 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2685 osi_FreeSmallSpace(tvc->mvid);
2686 tvc->mvid = (struct VenusFid*)0;
2690 afs_osi_Free(tvc->v.v_gnode, sizeof(struct gnode));
2691 #ifdef AFS_AIX32_ENV
2694 vms_delete(tvc->segid);
2696 tvc->segid = tvc->vmh = NULL;
2697 if (VREFCOUNT(tvc)) osi_Panic("flushVcache: vm race");
2705 #if defined(AFS_SUN5_ENV)
2711 if (tvc->linkData) {
2712 afs_osi_Free(tvc->linkData, strlen(tvc->linkData)+1);
2716 afs_FreeAllAxs(&(tvc->Access));
2722 * Free any leftover callback queue
2724 for (tsp = afs_cbrSpace; tsp; tsp = nsp ) {
2726 afs_osi_Free((char *)tsp, AFS_NCBRS * sizeof(struct afs_cbr));
2730 #if !defined(AFS_OSF_ENV)
2731 freeVCList = Initial_freeVCList = 0;
2733 RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
2734 LOCK_INIT(&afs_xvcb, "afs_xvcb");