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) || defined(AFS_FBSD_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); /* 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);
382 code = RXAFS_GiveUpCallBacks(tc->id, &fidArray,
388 if (!afs_Analyze(tc, code, 0, &treq,
389 AFS_STATS_FS_RPCIDX_GIVEUPCALLBACKS,
390 SHARED_LOCK, tsp->cell)) {
394 /* ignore return code, since callbacks may have
395 * been returned anyway, we shouldn't leave them
396 * around to be returned again.
398 * Next, see if we are done with this server, and if so,
399 * break to deal with the next one.
401 if (!tsp->cbrs) break;
403 } /* if to flush full buffer */
404 /* if we make it here, we have an entry at the head of cbrs,
405 * which we should copy to the file ID array and then free.
408 tfids[tcount++] = tcbrp->fid;
409 tsp->cbrs = tcbrp->next;
411 } /* while loop for this one server */
412 if (safety2 > afs_cacheStats) {
413 afs_warn("possible internal error afs_flushVCBs (%d)\n", safety2);
415 } /* for loop for this hash chain */
416 } /* loop through all hash chains */
417 if (safety1 > afs_totalServers+2) {
418 afs_warn("AFS internal error (afs_flushVCBs) (%d > %d), continuing...\n", safety1, afs_totalServers+2);
420 osi_Panic("afs_flushVCBS safety1");
423 ReleaseReadLock(&afs_xserver);
424 if (lockit) MReleaseWriteLock(&afs_xvcb);
432 * Queue a callback on the given fid.
438 * Locks the xvcb lock.
439 * Called when the xvcache lock is already held.
442 static afs_int32 afs_QueueVCB(struct vcache *avc)
444 register struct server *tsp;
445 register struct afs_cbr *tcbp;
447 AFS_STATCNT(afs_QueueVCB);
448 /* The callback is really just a struct server ptr. */
449 tsp = (struct server *)(avc->callback);
451 /* we now have a pointer to the server, so we just allocate
452 * a queue entry and queue it.
454 MObtainWriteLock(&afs_xvcb,274);
455 tcbp = afs_AllocCBR();
456 tcbp->fid = avc->fid.Fid;
457 tcbp->next = tsp->cbrs;
460 /* now release locks and return */
461 MReleaseWriteLock(&afs_xvcb);
470 * Remove a queued callback by looking through all the servers
471 * to see if any have this callback queued.
474 * afid: The fid we want cleansed of queued callbacks.
477 * Locks xvcb and xserver locks.
478 * Typically called with xdcache, xvcache and/or individual vcache
483 register struct VenusFid *afid;
488 register struct server *tsp;
489 register struct afs_cbr *tcbrp;
490 struct afs_cbr **lcbrpp;
492 AFS_STATCNT(afs_RemoveVCB);
493 MObtainWriteLock(&afs_xvcb,275);
494 ObtainReadLock(&afs_xserver);
495 for(i=0;i<NSERVERS;i++) {
496 for(tsp=afs_servers[i]; tsp; tsp=tsp->next) {
497 /* if cell is known, and is wrong, then skip this server */
498 if (tsp->cell && tsp->cell->cell != afid->Cell) continue;
501 * Otherwise, iterate through file IDs we're sending to the
504 lcbrpp = &tsp->cbrs; /* first queued return callback */
505 for(tcbrp = *lcbrpp; tcbrp; lcbrpp = &tcbrp->next, tcbrp = *lcbrpp) {
506 if (afid->Fid.Volume == tcbrp->fid.Volume &&
507 afid->Fid.Unique == tcbrp->fid.Unique &&
508 afid->Fid.Vnode == tcbrp->fid.Vnode) {
509 *lcbrpp = tcbrp->next; /* unthread from list */
517 ReleaseReadLock(&afs_xserver);
518 MReleaseWriteLock(&afs_xvcb);
528 * This routine is responsible for allocating a new cache entry
529 * from the free list. It formats the cache entry and inserts it
530 * into the appropriate hash tables. It must be called with
531 * afs_xvcache write-locked so as to prevent several processes from
532 * trying to create a new cache entry simultaneously.
535 * afid : The file id of the file whose cache entry is being
538 /* LOCK: afs_NewVCache afs_xvcache W */
539 struct vcache *afs_NewVCache(struct VenusFid *afid, struct server *serverp,
540 afs_int32 lockit, afs_int32 locktype)
544 afs_int32 anumber = VCACHE_FREE;
546 struct gnode *gnodepnt;
549 struct vm_info * vm_info_ptr;
550 #endif /* AFS_MACH_ENV */
553 #endif /* AFS_OSF_ENV */
554 struct afs_q *tq, *uq;
557 AFS_STATCNT(afs_NewVCache);
558 #ifdef AFS_LINUX22_ENV
560 /* Free some if possible. */
561 struct afs_q *tq, *uq;
562 int i; char *panicstr;
563 int vmax = 2 * afs_cacheStats;
564 int vn = VCACHE_FREE;
567 for(tq = VLRU.prev; tq != &VLRU && vn > 0; tq = uq) {
570 if (tvc->states & CVFlushed)
571 refpanic ("CVFlushed on VLRU");
573 refpanic ("Exceeded pool of AFS vnodes(VLRU cycle?)");
574 else if (QNext(uq) != tq)
575 refpanic ("VLRU inconsistent");
577 if (tvc == afs_globalVp)
580 if ( VREFCOUNT(tvc) && tvc->opens == 0 ) {
581 struct inode *ip = (struct inode*)tvc;
582 if (list_empty(&ip->i_dentry)) {
586 struct list_head *cur;
587 struct list_head *head = &ip->i_dentry;
592 while ((cur = cur->next) != head) {
593 struct dentry *dentry = list_entry(cur, struct dentry, d_alias);
594 if (!DCOUNT(dentry)) {
614 #endif /* AFS_LINUX22_ENV */
617 if (afs_vcount >= afs_maxvcount)
620 * If we are using > 33 % of the total system vnodes for AFS vcache
621 * entries or we are using the maximum number of vcache entries,
622 * then free some. (if our usage is > 33% we should free some, if
623 * our usage is > afs_maxvcount, set elsewhere to 0.5*nvnode,
624 * we _must_ free some -- no choice).
626 if ( (( 3 * afs_vcount ) > nvnode) || ( afs_vcount >= afs_maxvcount ))
629 struct afs_q *tq, *uq;
630 int i; char *panicstr;
633 for(tq = VLRU.prev; tq != &VLRU && anumber > 0; tq = uq) {
636 if (tvc->states & CVFlushed)
637 refpanic ("CVFlushed on VLRU");
638 else if (i++ > afs_maxvcount)
639 refpanic ("Exceeded pool of AFS vnodes(VLRU cycle?)");
640 else if (QNext(uq) != tq)
641 refpanic ("VLRU inconsistent");
642 else if (VREFCOUNT(tvc) < 1)
643 refpanic ("refcnt 0 on VLRU");
645 if ( VREFCOUNT(tvc) == 1 && tvc->opens == 0
646 && (tvc->states & CUnlinkedDel) == 0) {
647 code = afs_FlushVCache(tvc, &fv_slept);
654 continue; /* start over - may have raced. */
659 if (anumber == VCACHE_FREE) {
660 printf("NewVCache: warning none freed, using %d of %d\n",
661 afs_vcount, afs_maxvcount);
662 if (afs_vcount >= afs_maxvcount) {
663 osi_Panic("NewVCache - none freed");
664 /* XXX instead of panicing, should do afs_maxvcount++
665 and magic up another one */
671 if (getnewvnode(MOUNT_AFS, &Afs_vnodeops, &nvc)) {
672 /* What should we do ???? */
673 osi_Panic("afs_NewVCache: no more vnodes");
678 tvc->nextfree = (struct vcache *)0;
680 #else /* AFS_OSF_ENV */
681 /* pull out a free cache entry */
684 for(tq = VLRU.prev; (anumber > 0) && (tq != &VLRU); tq = uq) {
688 if (tvc->states & CVFlushed)
689 refpanic("CVFlushed on VLRU");
690 else if (i++ > 2*afs_cacheStats) /* even allowing for a few xallocs...*/
691 refpanic("Increase -stat parameter of afsd(VLRU cycle?)");
692 else if (QNext(uq) != tq)
693 refpanic("VLRU inconsistent");
695 #ifdef AFS_DARWIN_ENV
696 if (tvc->opens == 0 && ((tvc->states & CUnlinkedDel) == 0) &&
697 VREFCOUNT(tvc) == 1 && UBCINFOEXISTS(&tvc->v)) {
698 osi_VM_TryReclaim(tvc, &fv_slept);
702 continue; /* start over - may have raced. */
706 #if defined(AFS_FBSD_ENV)
707 if (VREFCOUNT(tvc) == 1 && tvc->opens == 0
708 && (tvc->states & CUnlinkedDel) == 0) {
709 if (!(VOP_LOCK(&tvc->v, LK_EXCLUSIVE, curproc))) {
710 if (VREFCOUNT(tvc) == 1 && tvc->opens == 0
711 && (tvc->states & CUnlinkedDel) == 0) {
713 AFS_GUNLOCK(); /* perhaps inline inactive for locking */
714 VOP_INACTIVE(&tvc->v, curproc);
717 VOP_UNLOCK(&tvc->v, 0, curproc);
722 if (VREFCOUNT(tvc) == 0 && tvc->opens == 0
723 && (tvc->states & CUnlinkedDel) == 0) {
724 code = afs_FlushVCache(tvc, &fv_slept);
731 continue; /* start over - may have raced. */
734 if (tq == uq ) break;
738 /* none free, making one is better than a panic */
739 afs_stats_cmperf.vcacheXAllocs++; /* count in case we have a leak */
740 tvc = (struct vcache *) afs_osi_Alloc(sizeof (struct vcache));
742 pin((char *)tvc, sizeof(struct vcache)); /* XXX */
745 /* In case it still comes here we need to fill this */
746 tvc->v.v_vm_info = VM_INFO_NULL;
747 vm_info_init(tvc->v.v_vm_info);
748 /* perhaps we should also do close_flush on non-NeXT mach systems;
749 * who knows; we don't currently have the sources.
751 #endif /* AFS_MACH_ENV */
752 #if defined(AFS_SGI_ENV)
753 { char name[METER_NAMSZ];
754 memset(tvc, 0, sizeof(struct vcache));
755 tvc->v.v_number = ++afsvnumbers;
756 tvc->vc_rwlockid = OSI_NO_LOCKID;
757 initnsema(&tvc->vc_rwlock, 1, makesname(name, "vrw", tvc->v.v_number));
758 #ifndef AFS_SGI53_ENV
759 initnsema(&tvc->v.v_sync, 0, makesname(name, "vsy", tvc->v.v_number));
761 #ifndef AFS_SGI62_ENV
762 initnlock(&tvc->v.v_lock, makesname(name, "vlk", tvc->v.v_number));
765 #endif /* AFS_SGI_ENV */
768 tvc = freeVCList; /* take from free list */
769 freeVCList = tvc->nextfree;
770 tvc->nextfree = (struct vcache *)0;
772 #endif /* AFS_OSF_ENV */
775 vm_info_ptr = tvc->v.v_vm_info;
776 #endif /* AFS_MACH_ENV */
778 #if !defined(AFS_SGI_ENV) && !defined(AFS_OSF_ENV)
779 memset((char *)tvc, 0, sizeof(struct vcache));
784 RWLOCK_INIT(&tvc->lock, "vcache lock");
785 #if defined(AFS_SUN5_ENV)
786 RWLOCK_INIT(&tvc->vlock, "vcache vlock");
787 #endif /* defined(AFS_SUN5_ENV) */
790 tvc->v.v_vm_info = vm_info_ptr;
791 tvc->v.v_vm_info->pager = MEMORY_OBJECT_NULL;
792 #endif /* AFS_MACH_ENV */
793 tvc->parentVnode = 0;
794 tvc->mvid = (struct VenusFid *) 0;
795 tvc->linkData = (char *) 0;
798 tvc->execsOrWriters = 0;
802 tvc->last_looker = 0;
804 tvc->asynchrony = -1;
806 afs_symhint_inval(tvc);
808 tvc->flushDV.low = tvc->flushDV.high = AFS_MAXDV;
811 tvc->truncPos = AFS_NOTRUNC; /* don't truncate until we need to */
812 hzero(tvc->m.DataVersion); /* in case we copy it into flushDV */
814 /* Hold it for the LRU (should make count 2) */
815 VN_HOLD((struct vnode *)tvc);
816 #else /* AFS_OSF_ENV */
817 VREFCOUNT_SET(tvc, 1); /* us */
818 #endif /* AFS_OSF_ENV */
820 LOCK_INIT(&tvc->pvmlock, "vcache pvmlock");
821 tvc->vmh = tvc->segid = NULL;
824 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
825 #if defined(AFS_SUN5_ENV)
826 rw_init(&tvc->rwlock, "vcache rwlock", RW_DEFAULT, NULL);
828 #if defined(AFS_SUN55_ENV)
829 /* This is required if the kaio (kernel aynchronous io)
830 ** module is installed. Inside the kernel, the function
831 ** check_vp( common/os/aio.c) checks to see if the kernel has
832 ** to provide asynchronous io for this vnode. This
833 ** function extracts the device number by following the
834 ** v_data field of the vnode. If we do not set this field
835 ** then the system panics. The value of the v_data field
836 ** is not really important for AFS vnodes because the kernel
837 ** does not do asynchronous io for regular files. Hence,
838 ** for the time being, we fill up the v_data field with the
839 ** vnode pointer itself. */
840 tvc->v.v_data = (char *)tvc;
841 #endif /* AFS_SUN55_ENV */
843 afs_BozonInit(&tvc->pvnLock, tvc);
847 tvc->callback = serverp; /* to minimize chance that clear
849 /* initialize vnode data, note vrefCount is v.v_count */
851 /* Don't forget to free the gnode space */
852 tvc->v.v_gnode = gnodepnt = (struct gnode *) osi_AllocSmallSpace(sizeof(struct gnode));
853 memset((char *)gnodepnt, 0, sizeof(struct gnode));
856 memset((void*)&(tvc->vc_bhv_desc), 0, sizeof(tvc->vc_bhv_desc));
857 bhv_desc_init(&(tvc->vc_bhv_desc), tvc, tvc, &Afs_vnodeops);
859 vn_bhv_head_init(&(tvc->v.v_bh), "afsvp");
860 vn_bhv_insert_initial(&(tvc->v.v_bh), &(tvc->vc_bhv_desc));
862 bhv_head_init(&(tvc->v.v_bh));
863 bhv_insert_initial(&(tvc->v.v_bh), &(tvc->vc_bhv_desc));
866 tvc->v.v_mreg = tvc->v.v_mregb = (struct pregion*)tvc;
868 tvc->v.v_trace = ktrace_alloc(VNODE_TRACE_SIZE, 0);
870 init_bitlock(&tvc->v.v_pcacheflag, VNODE_PCACHE_LOCKBIT, "afs_pcache",
872 init_mutex(&tvc->v.v_filocksem, MUTEX_DEFAULT, "afsvfl", (long)tvc);
873 init_mutex(&tvc->v.v_buf_lock, MUTEX_DEFAULT, "afsvnbuf", (long)tvc);
875 vnode_pcache_init(&tvc->v);
876 #if defined(DEBUG) && defined(VNODE_INIT_BITLOCK)
877 /* Above define is never true execpt in SGI test kernels. */
878 init_bitlock(&(tvc->v.v_flag, VLOCK, "vnode", tvc->v.v_number);
881 AFS_VN_INIT_BUF_LOCK(&(tvc->v));
884 SetAfsVnode((struct vnode *)tvc);
885 #endif /* AFS_SGI64_ENV */
886 #ifdef AFS_DARWIN_ENV
887 tvc->v.v_ubcinfo = UBC_INFO_NULL;
888 lockinit(&tvc->rwlock, PINOD, "vcache rwlock", 0, 0);
889 cache_purge((struct vnode *)tvc);
892 /* VLISTNONE(&tvc->v); */
893 tvc->v.v_freelist.tqe_next=0;
894 tvc->v.v_freelist.tqe_prev=(struct vnode **)0xdeadb;
895 /*tvc->vrefCount++;*/
898 lockinit(&tvc->rwlock, PINOD, "vcache rwlock", 0, 0);
899 cache_purge((struct vnode *)tvc);
902 tvc->v.v_usecount++; /* steal an extra ref for now so vfree never happens */
903 /* This extra ref is dealt with above... */
906 * The proper value for mvstat (for root fids) is setup by the caller.
909 if (afid->Fid.Vnode == 1 && afid->Fid.Unique == 1)
911 if (afs_globalVFS == 0) osi_Panic("afs globalvfs");
912 vSetVfsp(tvc, afs_globalVFS);
915 tvc->v.v_vfsnext = afs_globalVFS->vfs_vnodes; /* link off vfs */
916 tvc->v.v_vfsprev = NULL;
917 afs_globalVFS->vfs_vnodes = &tvc->v;
918 if (tvc->v.v_vfsnext != NULL)
919 tvc->v.v_vfsnext->v_vfsprev = &tvc->v;
920 tvc->v.v_next = gnodepnt->gn_vnode; /*Single vnode per gnode for us!*/
921 gnodepnt->gn_vnode = &tvc->v;
924 tvc->v.g_dev = ((struct mount *)afs_globalVFS->vfs_data)->m_dev;
926 #if defined(AFS_DUX40_ENV)
927 insmntque(tvc, afs_globalVFS, &afs_ubcops);
930 /* Is this needed??? */
931 insmntque(tvc, afs_globalVFS);
932 #endif /* AFS_OSF_ENV */
933 #endif /* AFS_DUX40_ENV */
934 #if defined(AFS_SGI_ENV)
935 VN_SET_DPAGES(&(tvc->v), (struct pfdat*)NULL);
936 osi_Assert((tvc->v.v_flag & VINACT) == 0);
938 osi_Assert(VN_GET_PGCNT(&(tvc->v)) == 0);
939 osi_Assert(tvc->mapcnt == 0 && tvc->vc_locktrips == 0);
940 osi_Assert(tvc->vc_rwlockid == OSI_NO_LOCKID);
941 osi_Assert(tvc->v.v_filocks == NULL);
942 #if !defined(AFS_SGI65_ENV)
943 osi_Assert(tvc->v.v_filocksem == NULL);
945 osi_Assert(tvc->cred == NULL);
947 vnode_pcache_reinit(&tvc->v);
948 tvc->v.v_rdev = NODEV;
950 vn_initlist((struct vnlist *)&tvc->v);
952 #endif /* AFS_SGI_ENV */
953 #if defined(AFS_LINUX22_ENV)
955 struct inode *ip = (struct inode*)tvc;
956 sema_init(&ip->i_sem, 1);
957 #if defined(AFS_LINUX24_ENV)
958 sema_init(&ip->i_zombie, 1);
959 init_waitqueue_head(&ip->i_wait);
960 spin_lock_init(&ip->i_data.i_shared_lock);
961 #ifdef STRUCT_ADDRESS_SPACE_HAS_PAGE_LOCK
962 spin_lock_init(&ip->i_data.page_lock);
964 INIT_LIST_HEAD(&ip->i_data.clean_pages);
965 INIT_LIST_HEAD(&ip->i_data.dirty_pages);
966 INIT_LIST_HEAD(&ip->i_data.locked_pages);
967 INIT_LIST_HEAD(&ip->i_dirty_buffers);
968 #ifdef STRUCT_INODE_HAS_I_DIRTY_DATA_BUFFERS
969 INIT_LIST_HEAD(&ip->i_dirty_data_buffers);
971 #ifdef STRUCT_INODE_HAS_I_DEVICES
972 INIT_LIST_HEAD(&ip->i_devices);
974 ip->i_data.host = (void*) ip;
975 ip->i_mapping = &ip->i_data;
976 #ifdef STRUCT_INODE_HAS_I_TRUNCATE_SEM
977 init_rwsem(&ip->i_truncate_sem);
980 sema_init(&ip->i_atomic_write, 1);
981 init_waitqueue(&ip->i_wait);
983 INIT_LIST_HEAD(&ip->i_hash);
984 INIT_LIST_HEAD(&ip->i_dentry);
986 ip->i_dev = afs_globalVFS->s_dev;
987 ip->i_sb = afs_globalVFS;
992 osi_dnlc_purgedp(tvc); /* this may be overkill */
993 memset((char *)&(tvc->quick), 0, sizeof(struct vtodc));
994 memset((char *)&(tvc->callsort), 0, sizeof(struct afs_q));
995 tvc->slocks = (struct SimpleLocks *)0;
998 tvc->hnext = afs_vhashT[i];
1000 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
1001 refpanic ("NewVCache VLRU inconsistent");
1003 QAdd(&VLRU, &tvc->vlruq); /* put in lruq */
1004 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
1005 refpanic ("NewVCache VLRU inconsistent2");
1007 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
1008 refpanic ("NewVCache VLRU inconsistent3");
1010 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
1011 refpanic ("NewVCache VLRU inconsistent4");
1021 * afs_FlushActiveVcaches
1027 * doflocks : Do we handle flocks?
1029 /* LOCK: afs_FlushActiveVcaches afs_xvcache N */
1031 afs_FlushActiveVcaches(doflocks)
1032 register afs_int32 doflocks;
1034 { /*afs_FlushActiveVcaches*/
1036 register struct vcache *tvc;
1038 register struct conn *tc;
1039 register afs_int32 code;
1040 register struct AFS_UCRED *cred;
1041 struct vrequest treq, ureq;
1042 struct AFSVolSync tsync;
1046 AFS_STATCNT(afs_FlushActiveVcaches);
1047 ObtainReadLock(&afs_xvcache);
1048 for(i=0;i<VCSIZE;i++) {
1049 for(tvc = afs_vhashT[i]; tvc; tvc=tvc->hnext) {
1050 if (doflocks && tvc->flockCount != 0) {
1051 /* if this entry has an flock, send a keep-alive call out */
1053 ReleaseReadLock(&afs_xvcache);
1054 ObtainWriteLock(&tvc->lock,51);
1056 afs_InitReq(&treq, &afs_osi_cred);
1057 treq.flags |= O_NONBLOCK;
1059 tc = afs_Conn(&tvc->fid, &treq, SHARED_LOCK);
1061 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_EXTENDLOCK);
1064 RXAFS_ExtendLock(tc->id,
1065 (struct AFSFid *) &tvc->fid.Fid,
1072 (afs_Analyze(tc, code, &tvc->fid, &treq,
1073 AFS_STATS_FS_RPCIDX_EXTENDLOCK,
1074 SHARED_LOCK, (struct cell *)0));
1076 ReleaseWriteLock(&tvc->lock);
1077 ObtainReadLock(&afs_xvcache);
1081 if ((tvc->states & CCore) || (tvc->states & CUnlinkedDel)) {
1083 * Don't let it evaporate in case someone else is in
1084 * this code. Also, drop the afs_xvcache lock while
1085 * getting vcache locks.
1088 ReleaseReadLock(&afs_xvcache);
1089 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1090 afs_BozonLock(&tvc->pvnLock, tvc);
1092 #if defined(AFS_SGI_ENV)
1094 * That's because if we come in via the CUnlinkedDel bit state path we'll be have 0 refcnt
1096 osi_Assert(VREFCOUNT(tvc) > 0);
1097 AFS_RWLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1099 ObtainWriteLock(&tvc->lock,52);
1100 if (tvc->states & CCore) {
1101 tvc->states &= ~CCore;
1102 /* XXXX Find better place-holder for cred XXXX */
1103 cred = (struct AFS_UCRED *) tvc->linkData;
1104 tvc->linkData = (char *) 0; /* XXX */
1105 afs_InitReq(&ureq, cred);
1106 afs_Trace2(afs_iclSetp, CM_TRACE_ACTCCORE,
1107 ICL_TYPE_POINTER, tvc,
1108 ICL_TYPE_INT32, tvc->execsOrWriters);
1109 code = afs_StoreOnLastReference(tvc, &ureq);
1110 ReleaseWriteLock(&tvc->lock);
1111 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1112 afs_BozonUnlock(&tvc->pvnLock, tvc);
1114 hzero(tvc->flushDV);
1117 if (code && code != VNOVNODE) {
1118 afs_StoreWarn(code, tvc->fid.Fid.Volume,
1119 /* /dev/console */ 1);
1121 } else if (tvc->states & CUnlinkedDel) {
1125 ReleaseWriteLock(&tvc->lock);
1126 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1127 afs_BozonUnlock(&tvc->pvnLock, tvc);
1129 #if defined(AFS_SGI_ENV)
1130 AFS_RWUNLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1132 afs_remunlink(tvc, 0);
1133 #if defined(AFS_SGI_ENV)
1134 AFS_RWLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1138 /* lost (or won, perhaps) the race condition */
1139 ReleaseWriteLock(&tvc->lock);
1140 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1141 afs_BozonUnlock(&tvc->pvnLock, tvc);
1144 #if defined(AFS_SGI_ENV)
1145 AFS_RWUNLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1147 ObtainReadLock(&afs_xvcache);
1153 AFS_RELE((struct vnode *)tvc);
1155 /* Matches write code setting CCore flag */
1159 #ifdef AFS_DARWIN_ENV
1160 if (VREFCOUNT(tvc) == 1 && UBCINFOEXISTS(&tvc->v)) {
1161 if (tvc->opens) panic("flushactive open, hasubc, but refcnt 1");
1162 osi_VM_TryReclaim(tvc,0);
1167 ReleaseReadLock(&afs_xvcache);
1169 } /*afs_FlushActiveVcaches*/
1176 * Make sure a cache entry is up-to-date status-wise.
1178 * NOTE: everywhere that calls this can potentially be sped up
1179 * by checking CStatd first, and avoiding doing the InitReq
1180 * if this is up-to-date.
1182 * Anymore, the only places that call this KNOW already that the
1183 * vcache is not up-to-date, so we don't screw around.
1186 * avc : Ptr to vcache entry to verify.
1190 int afs_VerifyVCache2(struct vcache *avc, struct vrequest *areq)
1192 register struct vcache *tvc;
1194 AFS_STATCNT(afs_VerifyVCache);
1196 #if defined(AFS_OSF_ENV)
1197 ObtainReadLock(&avc->lock);
1198 if (afs_IsWired(avc)) {
1199 ReleaseReadLock(&avc->lock);
1202 ReleaseReadLock(&avc->lock);
1203 #endif /* AFS_OSF_ENV */
1204 /* otherwise we must fetch the status info */
1206 ObtainWriteLock(&avc->lock,53);
1207 if (avc->states & CStatd) {
1208 ReleaseWriteLock(&avc->lock);
1211 ObtainWriteLock(&afs_xcbhash, 461);
1212 avc->states &= ~( CStatd | CUnique );
1213 avc->callback = (struct server *)0;
1214 afs_DequeueCallback(avc);
1215 ReleaseWriteLock(&afs_xcbhash);
1216 ReleaseWriteLock(&avc->lock);
1218 /* since we've been called back, or the callback has expired,
1219 * it's possible that the contents of this directory, or this
1220 * file's name have changed, thus invalidating the dnlc contents.
1222 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
1223 osi_dnlc_purgedp (avc);
1225 osi_dnlc_purgevp (avc);
1227 /* fetch the status info */
1228 tvc = afs_GetVCache(&avc->fid, areq, (afs_int32*)0, avc, READ_LOCK);
1229 if (!tvc) return ENOENT;
1230 /* Put it back; caller has already incremented vrefCount */
1231 afs_PutVCache(tvc, READ_LOCK);
1234 } /*afs_VerifyVCache*/
1241 * Simple copy of stat info into cache.
1244 * avc : Ptr to vcache entry involved.
1245 * astat : Ptr to stat info to copy.
1248 * Nothing interesting.
1250 * Callers: as of 1992-04-29, only called by WriteVCache
1253 afs_SimpleVStat(avc, astat, areq)
1254 register struct vcache *avc;
1255 register struct AFSFetchStatus *astat;
1256 struct vrequest *areq;
1257 { /*afs_SimpleVStat*/
1260 AFS_STATCNT(afs_SimpleVStat);
1263 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1264 && !AFS_VN_MAPPED((vnode_t*)avc))
1266 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc))
1270 #ifdef AFS_64BIT_ClIENT
1271 FillInt64(length, astat->Length_hi, astat->Length);
1272 #else /* AFS_64BIT_CLIENT */
1273 length = astat->Length;
1274 #endif /* AFS_64BIT_CLIENT */
1275 #if defined(AFS_SGI_ENV)
1276 osi_Assert((valusema(&avc->vc_rwlock) <= 0) &&
1277 (OSI_GET_LOCKID() == avc->vc_rwlockid));
1278 if (length < avc->m.Length) {
1279 vnode_t *vp = (vnode_t *)avc;
1281 osi_Assert(WriteLocked(&avc->lock));
1282 ReleaseWriteLock(&avc->lock);
1284 PTOSSVP(vp, (off_t)length, (off_t)MAXLONG);
1286 ObtainWriteLock(&avc->lock,67);
1289 /* if writing the file, don't fetch over this value */
1290 afs_Trace3(afs_iclSetp, CM_TRACE_SIMPLEVSTAT,
1291 ICL_TYPE_POINTER, avc,
1292 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length),
1293 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1294 avc->m.Length = length;
1295 avc->m.Date = astat->ClientModTime;
1297 avc->m.Owner = astat->Owner;
1298 avc->m.Group = astat->Group;
1299 avc->m.Mode = astat->UnixModeBits;
1300 if (vType(avc) == VREG) {
1301 avc->m.Mode |= S_IFREG;
1303 else if (vType(avc) == VDIR) {
1304 avc->m.Mode |= S_IFDIR;
1306 else if (vType(avc) == VLNK) {
1310 avc->m.Mode |= S_IFLNK;
1311 if ((avc->m.Mode & 0111) == 0) avc->mvstat = 1;
1313 if (avc->states & CForeign) {
1314 struct axscache *ac;
1315 avc->anyAccess = astat->AnonymousAccess;
1317 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1319 * Caller has at least one bit not covered by anonymous, and
1320 * thus may have interesting rights.
1322 * HOWEVER, this is a really bad idea, because any access query
1323 * for bits which aren't covered by anonymous, on behalf of a user
1324 * who doesn't have any special rights, will result in an answer of
1325 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1326 * It's an especially bad idea under Ultrix, since (due to the lack of
1327 * a proper access() call) it must perform several afs_access() calls
1328 * in order to create magic mode bits that vary according to who makes
1329 * the call. In other words, _every_ stat() generates a test for
1332 #endif /* badidea */
1333 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1334 ac->axess = astat->CallerAccess;
1335 else /* not found, add a new one if possible */
1336 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1340 } /*afs_SimpleVStat*/
1347 * Store the status info *only* back to the server for a
1351 * avc : Ptr to the vcache entry.
1352 * astatus : Ptr to the status info to store.
1353 * areq : Ptr to the associated vrequest.
1356 * Must be called with a shared lock held on the vnode.
1359 afs_WriteVCache(avc, astatus, areq)
1360 register struct vcache *avc;
1361 register struct AFSStoreStatus *astatus;
1362 struct vrequest *areq;
1364 { /*afs_WriteVCache*/
1367 struct AFSFetchStatus OutStatus;
1368 struct AFSVolSync tsync;
1371 AFS_STATCNT(afs_WriteVCache);
1372 afs_Trace2(afs_iclSetp, CM_TRACE_WVCACHE, ICL_TYPE_POINTER, avc,
1373 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
1376 tc = afs_Conn(&avc->fid, areq, SHARED_LOCK);
1378 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STORESTATUS);
1380 code = RXAFS_StoreStatus(tc->id,
1381 (struct AFSFid *) &avc->fid.Fid,
1382 astatus, &OutStatus, &tsync);
1388 (afs_Analyze(tc, code, &avc->fid, areq,
1389 AFS_STATS_FS_RPCIDX_STORESTATUS,
1390 SHARED_LOCK, (struct cell *)0));
1392 UpgradeSToWLock(&avc->lock,20);
1394 /* success, do the changes locally */
1395 afs_SimpleVStat(avc, &OutStatus, areq);
1397 * Update the date, too. SimpleVStat didn't do this, since
1398 * it thought we were doing this after fetching new status
1399 * over a file being written.
1401 avc->m.Date = OutStatus.ClientModTime;
1404 /* failure, set up to check with server next time */
1405 ObtainWriteLock(&afs_xcbhash, 462);
1406 afs_DequeueCallback(avc);
1407 avc->states &= ~( CStatd | CUnique); /* turn off stat valid flag */
1408 ReleaseWriteLock(&afs_xcbhash);
1409 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
1410 osi_dnlc_purgedp (avc); /* if it (could be) a directory */
1412 ConvertWToSLock(&avc->lock);
1415 } /*afs_WriteVCache*/
1421 * Copy astat block into vcache info
1424 * avc : Ptr to vcache entry.
1425 * astat : Ptr to stat block to copy in.
1426 * areq : Ptr to associated request.
1429 * Must be called under a write lock
1431 * Note: this code may get dataversion and length out of sync if the file has
1432 * been modified. This is less than ideal. I haven't thought about
1433 * it sufficiently to be certain that it is adequate.
1436 afs_ProcessFS(avc, astat, areq)
1437 register struct vcache *avc;
1438 struct vrequest *areq;
1439 register struct AFSFetchStatus *astat;
1445 AFS_STATCNT(afs_ProcessFS);
1447 #ifdef AFS_64BIT_CLIENT
1448 FillInt64(length, astat->Length_hi, astat->Length);
1449 #else /* AFS_64BIT_CLIENT */
1450 length = astat->Length;
1451 #endif /* AFS_64BIT_CLIENT */
1452 /* WARNING: afs_DoBulkStat uses the Length field to store a sequence
1453 * number for each bulk status request. Under no circumstances
1454 * should afs_DoBulkStat store a sequence number if the new
1455 * length will be ignored when afs_ProcessFS is called with
1456 * new stats. If you change the following conditional then you
1457 * also need to change the conditional in afs_DoBulkStat. */
1459 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1460 && !AFS_VN_MAPPED((vnode_t*)avc))
1462 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc))
1465 /* if we're writing or mapping this file, don't fetch over these
1468 afs_Trace3(afs_iclSetp, CM_TRACE_PROCESSFS, ICL_TYPE_POINTER, avc,
1469 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length),
1470 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1471 avc->m.Length = length;
1472 avc->m.Date = astat->ClientModTime;
1474 hset64(avc->m.DataVersion, astat->dataVersionHigh, astat->DataVersion);
1475 avc->m.Owner = astat->Owner;
1476 avc->m.Mode = astat->UnixModeBits;
1477 avc->m.Group = astat->Group;
1478 avc->m.LinkCount = astat->LinkCount;
1479 if (astat->FileType == File) {
1480 vSetType(avc, VREG);
1481 avc->m.Mode |= S_IFREG;
1483 else if (astat->FileType == Directory) {
1484 vSetType(avc, VDIR);
1485 avc->m.Mode |= S_IFDIR;
1487 else if (astat->FileType == SymbolicLink) {
1488 vSetType(avc, VLNK);
1489 avc->m.Mode |= S_IFLNK;
1490 if ((avc->m.Mode & 0111) == 0) avc->mvstat = 1;
1492 avc->anyAccess = astat->AnonymousAccess;
1494 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1496 * Caller has at least one bit not covered by anonymous, and
1497 * thus may have interesting rights.
1499 * HOWEVER, this is a really bad idea, because any access query
1500 * for bits which aren't covered by anonymous, on behalf of a user
1501 * who doesn't have any special rights, will result in an answer of
1502 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1503 * It's an especially bad idea under Ultrix, since (due to the lack of
1504 * a proper access() call) it must perform several afs_access() calls
1505 * in order to create magic mode bits that vary according to who makes
1506 * the call. In other words, _every_ stat() generates a test for
1509 #endif /* badidea */
1511 struct axscache *ac;
1512 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1513 ac->axess = astat->CallerAccess;
1514 else /* not found, add a new one if possible */
1515 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1518 #ifdef AFS_LINUX22_ENV
1519 vcache2inode(avc); /* Set the inode attr cache */
1525 afs_RemoteLookup(afid, areq, name, nfid, OutStatusp, CallBackp, serverp, tsyncp)
1526 register struct VenusFid *afid;
1527 struct vrequest *areq;
1529 struct VenusFid *nfid;
1530 struct AFSFetchStatus *OutStatusp;
1531 struct AFSCallBack *CallBackp;
1532 struct server **serverp;
1533 struct AFSVolSync *tsyncp;
1536 register struct vcache *tvc;
1539 register struct conn *tc;
1540 struct AFSFetchStatus OutDirStatus;
1543 if (!name) name = ""; /* XXX */
1545 tc = afs_Conn(afid, areq, SHARED_LOCK);
1547 if (serverp) *serverp = tc->srvr->server;
1549 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_XLOOKUP);
1551 code = RXAFS_Lookup(tc->id, (struct AFSFid *) &afid->Fid, name,
1552 (struct AFSFid *) &nfid->Fid,
1553 OutStatusp, &OutDirStatus, CallBackp, tsyncp);
1559 (afs_Analyze(tc, code, afid, areq,
1560 AFS_STATS_FS_RPCIDX_XLOOKUP,
1561 SHARED_LOCK, (struct cell *)0));
1571 * Given a file id and a vrequest structure, fetch the status
1572 * information associated with the file.
1576 * areq : Ptr to associated vrequest structure, specifying the
1577 * user whose authentication tokens will be used.
1578 * avc : caller may already have a vcache for this file, which is
1582 * The cache entry is returned with an increased vrefCount field.
1583 * The entry must be discarded by calling afs_PutVCache when you
1584 * are through using the pointer to the cache entry.
1586 * You should not hold any locks when calling this function, except
1587 * locks on other vcache entries. If you lock more than one vcache
1588 * entry simultaneously, you should lock them in this order:
1590 * 1. Lock all files first, then directories.
1591 * 2. Within a particular type, lock entries in Fid.Vnode order.
1593 * This locking hierarchy is convenient because it allows locking
1594 * of a parent dir cache entry, given a file (to check its access
1595 * control list). It also allows renames to be handled easily by
1596 * locking directories in a constant order.
1597 * NB. NewVCache -> FlushVCache presently (4/10/95) drops the xvcache lock.
1599 struct vcache *afs_GetVCache(afid, areq, cached, avc, locktype)
1600 register struct VenusFid *afid;
1601 struct vrequest *areq;
1604 struct vcache *avc; /* might have a vcache structure already, which must
1605 * already be held by the caller */
1608 afs_int32 code, i, newvcache=0;
1609 register struct vcache *tvc;
1613 AFS_STATCNT(afs_GetVCache);
1615 if (cached) *cached = 0; /* Init just in case */
1618 ObtainSharedLock(&afs_xvcache,5);
1620 tvc = afs_FindVCache(afid, 0, 0, &retry, DO_STATS | DO_VLRU );
1622 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1623 ReleaseSharedLock(&afs_xvcache);
1624 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1632 if (tvc->states & CStatd) {
1633 ReleaseSharedLock(&afs_xvcache);
1638 UpgradeSToWLock(&afs_xvcache,21);
1640 /* no cache entry, better grab one */
1641 tvc = afs_NewVCache(afid, (struct server *)0, 1, WRITE_LOCK);
1644 ConvertWToSLock(&afs_xvcache);
1645 afs_stats_cmperf.vcacheMisses++;
1648 ReleaseSharedLock(&afs_xvcache);
1650 ObtainWriteLock(&tvc->lock,54);
1652 if (tvc->states & CStatd) {
1653 #ifdef AFS_LINUX22_ENV
1656 ReleaseWriteLock(&tvc->lock);
1657 #ifdef AFS_DARWIN_ENV
1663 #if defined(AFS_OSF_ENV)
1664 if (afs_IsWired(tvc)) {
1665 ReleaseWriteLock(&tvc->lock);
1668 #endif /* AFS_OSF_ENV */
1670 ObtainWriteLock(&afs_xcbhash, 464);
1671 tvc->states &= ~CUnique;
1673 afs_DequeueCallback(tvc);
1674 ReleaseWriteLock(&afs_xcbhash);
1676 /* It is always appropriate to throw away all the access rights? */
1677 afs_FreeAllAxs(&(tvc->Access));
1678 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-volume info */
1680 if ((tvp->states & VForeign)) {
1681 if (newvcache) tvc->states |= CForeign;
1682 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
1683 && (tvp->rootUnique == afid->Fid.Unique)) {
1687 if (tvp->states & VRO) tvc->states |= CRO;
1688 if (tvp->states & VBackup) tvc->states |= CBackup;
1689 /* now copy ".." entry back out of volume structure, if necessary */
1690 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
1692 tvc->mvid = (struct VenusFid *)
1693 osi_AllocSmallSpace(sizeof(struct VenusFid));
1694 *tvc->mvid = tvp->dotdot;
1696 afs_PutVolume(tvp, READ_LOCK);
1700 afs_RemoveVCB(afid);
1702 struct AFSFetchStatus OutStatus;
1704 if (afs_DynrootNewVnode(tvc, &OutStatus)) {
1705 afs_ProcessFS(tvc, &OutStatus, areq);
1706 tvc->states |= CStatd | CUnique;
1709 code = afs_FetchStatus(tvc, afid, areq, &OutStatus);
1714 ReleaseWriteLock(&tvc->lock);
1716 ObtainReadLock(&afs_xvcache);
1718 ReleaseReadLock(&afs_xvcache);
1719 return (struct vcache *) 0;
1722 ReleaseWriteLock(&tvc->lock);
1723 #ifdef AFS_DARWIN_ENV
1732 struct vcache *afs_LookupVCache(struct VenusFid *afid, struct vrequest *areq,
1733 afs_int32 *cached, afs_int32 locktype,
1734 struct vcache *adp, char *aname)
1736 afs_int32 code, now, newvcache=0, hash;
1737 struct VenusFid nfid;
1738 register struct vcache *tvc;
1740 struct AFSFetchStatus OutStatus;
1741 struct AFSCallBack CallBack;
1742 struct AFSVolSync tsync;
1743 struct server *serverp = 0;
1747 AFS_STATCNT(afs_GetVCache);
1748 if (cached) *cached = 0; /* Init just in case */
1751 ObtainReadLock(&afs_xvcache);
1752 tvc = afs_FindVCache(afid, 0, 0, &retry, DO_STATS /* no vlru */);
1755 ReleaseReadLock(&afs_xvcache);
1757 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1758 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1762 ObtainReadLock(&tvc->lock);
1764 if (tvc->states & CStatd) {
1768 ReleaseReadLock(&tvc->lock);
1771 tvc->states &= ~CUnique;
1773 ReleaseReadLock(&tvc->lock);
1774 ObtainReadLock(&afs_xvcache);
1778 ReleaseReadLock(&afs_xvcache);
1780 /* lookup the file */
1783 origCBs = afs_allCBs; /* if anything changes, we don't have a cb */
1784 code = afs_RemoteLookup(&adp->fid, areq, aname, &nfid, &OutStatus, &CallBack,
1788 ObtainSharedLock(&afs_xvcache,6);
1789 tvc = afs_FindVCache(&nfid, 0, 0, &retry, DO_VLRU /* no xstats now*/);
1791 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1792 ReleaseSharedLock(&afs_xvcache);
1793 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1799 /* no cache entry, better grab one */
1800 UpgradeSToWLock(&afs_xvcache,22);
1801 tvc = afs_NewVCache(&nfid, (struct server *)0, 1, WRITE_LOCK);
1803 ConvertWToSLock(&afs_xvcache);
1806 ReleaseSharedLock(&afs_xvcache);
1807 ObtainWriteLock(&tvc->lock,55);
1809 /* It is always appropriate to throw away all the access rights? */
1810 afs_FreeAllAxs(&(tvc->Access));
1811 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-vol info */
1813 if ((tvp->states & VForeign)) {
1814 if (newvcache) tvc->states |= CForeign;
1815 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
1816 && (tvp->rootUnique == afid->Fid.Unique))
1819 if (tvp->states & VRO) tvc->states |= CRO;
1820 if (tvp->states & VBackup) tvc->states |= CBackup;
1821 /* now copy ".." entry back out of volume structure, if necessary */
1822 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
1824 tvc->mvid = (struct VenusFid *)
1825 osi_AllocSmallSpace(sizeof(struct VenusFid));
1826 *tvc->mvid = tvp->dotdot;
1831 ObtainWriteLock(&afs_xcbhash, 465);
1832 afs_DequeueCallback(tvc);
1833 tvc->states &= ~( CStatd | CUnique );
1834 ReleaseWriteLock(&afs_xcbhash);
1835 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
1836 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
1838 afs_PutVolume(tvp, READ_LOCK);
1839 ReleaseWriteLock(&tvc->lock);
1840 ObtainReadLock(&afs_xvcache);
1842 ReleaseReadLock(&afs_xvcache);
1843 return (struct vcache *) 0;
1846 ObtainWriteLock(&afs_xcbhash, 466);
1847 if (origCBs == afs_allCBs) {
1848 if (CallBack.ExpirationTime) {
1849 tvc->callback = serverp;
1850 tvc->cbExpires = CallBack.ExpirationTime+now;
1851 tvc->states |= CStatd | CUnique;
1852 tvc->states &= ~CBulkFetching;
1853 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvp);
1854 } else if (tvc->states & CRO) {
1855 /* adapt gives us an hour. */
1856 tvc->cbExpires = 3600+osi_Time(); /*XXX*/
1857 tvc->states |= CStatd | CUnique;
1858 tvc->states &= ~CBulkFetching;
1859 afs_QueueCallback(tvc, CBHash(3600), tvp);
1861 tvc->callback = (struct server *)0;
1862 afs_DequeueCallback(tvc);
1863 tvc->states &= ~(CStatd | CUnique);
1864 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
1865 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
1868 afs_DequeueCallback(tvc);
1869 tvc->states &= ~CStatd;
1870 tvc->states &= ~CUnique;
1871 tvc->callback = (struct server *)0;
1872 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
1873 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
1875 ReleaseWriteLock(&afs_xcbhash);
1877 afs_PutVolume(tvp, READ_LOCK);
1878 afs_ProcessFS(tvc, &OutStatus, areq);
1880 ReleaseWriteLock(&tvc->lock);
1881 #ifdef AFS_DARWIN_ENV
1888 struct vcache *afs_GetRootVCache(struct VenusFid *afid,
1889 struct vrequest *areq, afs_int32 *cached,
1890 struct volume *tvolp, afs_int32 locktype)
1892 afs_int32 code, i, newvcache = 0, haveStatus = 0;
1893 afs_int32 getNewFid = 0;
1895 struct VenusFid nfid;
1896 register struct vcache *tvc;
1897 struct server *serverp = 0;
1898 struct AFSFetchStatus OutStatus;
1899 struct AFSCallBack CallBack;
1900 struct AFSVolSync tsync;
1906 if (!tvolp->rootVnode || getNewFid) {
1907 struct VenusFid tfid;
1910 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
1911 origCBs = afs_allCBs; /* ignore InitCallBackState */
1912 code = afs_RemoteLookup(&tfid, areq, (char *)0, &nfid,
1913 &OutStatus, &CallBack, &serverp, &tsync);
1915 return (struct vcache *)0;
1917 /* ReleaseReadLock(&tvolp->lock); */
1918 ObtainWriteLock(&tvolp->lock,56);
1919 tvolp->rootVnode = afid->Fid.Vnode = nfid.Fid.Vnode;
1920 tvolp->rootUnique = afid->Fid.Unique = nfid.Fid.Unique;
1921 ReleaseWriteLock(&tvolp->lock);
1922 /* ObtainReadLock(&tvolp->lock);*/
1925 afid->Fid.Vnode = tvolp->rootVnode;
1926 afid->Fid.Unique = tvolp->rootUnique;
1929 ObtainSharedLock(&afs_xvcache,7);
1931 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
1932 if (!FidCmp(&(tvc->fid), afid)) {
1934 /* Grab this vnode, possibly reactivating from the free list */
1935 /* for the present (95.05.25) everything on the hash table is
1936 * definitively NOT in the free list -- at least until afs_reclaim
1937 * can be safely implemented */
1940 vg = vget((struct vnode *)tvc); /* this bumps ref count */
1944 #endif /* AFS_OSF_ENV */
1949 if (!haveStatus && (!tvc || !(tvc->states & CStatd))) {
1950 /* Mount point no longer stat'd or unknown. FID may have changed. */
1955 tvc = (struct vcache*)0;
1957 ReleaseSharedLock(&afs_xvcache);
1962 UpgradeSToWLock(&afs_xvcache,23);
1963 /* no cache entry, better grab one */
1964 tvc = afs_NewVCache(afid, (struct server *)0, 1, WRITE_LOCK);
1966 afs_stats_cmperf.vcacheMisses++;
1969 if (cached) *cached = 1;
1970 afs_stats_cmperf.vcacheHits++;
1972 /* we already bumped the ref count in the for loop above */
1973 #else /* AFS_OSF_ENV */
1976 UpgradeSToWLock(&afs_xvcache,24);
1977 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
1978 refpanic ("GRVC VLRU inconsistent0");
1980 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
1981 refpanic ("GRVC VLRU inconsistent1");
1983 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
1984 refpanic ("GRVC VLRU inconsistent2");
1986 QRemove(&tvc->vlruq); /* move to lruq head */
1987 QAdd(&VLRU, &tvc->vlruq);
1988 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
1989 refpanic ("GRVC VLRU inconsistent3");
1991 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
1992 refpanic ("GRVC VLRU inconsistent4");
1994 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
1995 refpanic ("GRVC VLRU inconsistent5");
2000 ReleaseWriteLock(&afs_xvcache);
2002 if (tvc->states & CStatd) {
2006 ObtainReadLock(&tvc->lock);
2007 tvc->states &= ~CUnique;
2008 tvc->callback = (struct server *)0; /* redundant, perhaps */
2009 ReleaseReadLock(&tvc->lock);
2012 ObtainWriteLock(&tvc->lock,57);
2014 /* It is always appropriate to throw away all the access rights? */
2015 afs_FreeAllAxs(&(tvc->Access));
2017 if (newvcache) tvc->states |= CForeign;
2018 if (tvolp->states & VRO) tvc->states |= CRO;
2019 if (tvolp->states & VBackup) tvc->states |= CBackup;
2020 /* now copy ".." entry back out of volume structure, if necessary */
2021 if (newvcache && (tvolp->rootVnode == afid->Fid.Vnode)
2022 && (tvolp->rootUnique == afid->Fid.Unique)) {
2025 if (tvc->mvstat == 2 && tvolp->dotdot.Fid.Volume != 0) {
2027 tvc->mvid = (struct VenusFid *)osi_AllocSmallSpace(sizeof(struct VenusFid));
2028 *tvc->mvid = tvolp->dotdot;
2032 afs_RemoveVCB(afid);
2035 struct VenusFid tfid;
2038 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
2039 origCBs = afs_allCBs; /* ignore InitCallBackState */
2040 code = afs_RemoteLookup(&tfid, areq, (char *)0, &nfid, &OutStatus,
2041 &CallBack, &serverp, &tsync);
2045 ObtainWriteLock(&afs_xcbhash, 467);
2046 afs_DequeueCallback(tvc);
2047 tvc->callback = (struct server *)0;
2048 tvc->states &= ~(CStatd|CUnique);
2049 ReleaseWriteLock(&afs_xcbhash);
2050 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2051 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2052 ReleaseWriteLock(&tvc->lock);
2053 ObtainReadLock(&afs_xvcache);
2055 ReleaseReadLock(&afs_xvcache);
2056 return (struct vcache *) 0;
2059 ObtainWriteLock(&afs_xcbhash, 468);
2060 if (origCBs == afs_allCBs) {
2061 tvc->states |= CTruth;
2062 tvc->callback = serverp;
2063 if (CallBack.ExpirationTime != 0) {
2064 tvc->cbExpires = CallBack.ExpirationTime+start;
2065 tvc->states |= CStatd;
2066 tvc->states &= ~CBulkFetching;
2067 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvolp);
2068 } else if (tvc->states & CRO) {
2069 /* adapt gives us an hour. */
2070 tvc->cbExpires = 3600+osi_Time(); /*XXX*/
2071 tvc->states |= CStatd;
2072 tvc->states &= ~CBulkFetching;
2073 afs_QueueCallback(tvc, CBHash(3600), tvolp);
2076 afs_DequeueCallback(tvc);
2077 tvc->callback = (struct server *)0;
2078 tvc->states &= ~(CStatd | CUnique);
2079 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2080 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2082 ReleaseWriteLock(&afs_xcbhash);
2083 afs_ProcessFS(tvc, &OutStatus, areq);
2085 ReleaseWriteLock(&tvc->lock);
2092 * must be called with avc write-locked
2093 * don't absolutely have to invalidate the hint unless the dv has
2094 * changed, but be sure to get it right else there will be consistency bugs.
2096 afs_int32 afs_FetchStatus(struct vcache *avc, struct VenusFid *afid,
2097 struct vrequest *areq, struct AFSFetchStatus *Outsp)
2101 register struct conn *tc;
2102 struct AFSCallBack CallBack;
2103 struct AFSVolSync tsync;
2104 struct volume* volp;
2108 tc = afs_Conn(afid, areq, SHARED_LOCK);
2109 avc->quick.stamp = 0; avc->h1.dchint = NULL; /* invalidate hints */
2111 avc->callback = tc->srvr->server;
2113 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_FETCHSTATUS);
2115 code = RXAFS_FetchStatus(tc->id,
2116 (struct AFSFid *) &afid->Fid,
2117 Outsp, &CallBack, &tsync);
2125 (afs_Analyze(tc, code, afid, areq,
2126 AFS_STATS_FS_RPCIDX_FETCHSTATUS,
2127 SHARED_LOCK, (struct cell *)0));
2130 afs_ProcessFS(avc, Outsp, areq);
2131 volp = afs_GetVolume(afid, areq, READ_LOCK);
2132 ObtainWriteLock(&afs_xcbhash, 469);
2133 avc->states |= CTruth;
2134 if (avc->callback /* check for race */) {
2135 if (CallBack.ExpirationTime != 0) {
2136 avc->cbExpires = CallBack.ExpirationTime+start;
2137 avc->states |= CStatd;
2138 avc->states &= ~CBulkFetching;
2139 afs_QueueCallback(avc, CBHash(CallBack.ExpirationTime), volp);
2141 else if (avc->states & CRO)
2142 { /* ordinary callback on a read-only volume -- AFS 3.2 style */
2143 avc->cbExpires = 3600+start;
2144 avc->states |= CStatd;
2145 avc->states &= ~CBulkFetching;
2146 afs_QueueCallback(avc, CBHash(3600), volp);
2149 afs_DequeueCallback(avc);
2150 avc->callback = (struct server *)0;
2151 avc->states &= ~(CStatd|CUnique);
2152 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
2153 osi_dnlc_purgedp (avc); /* if it (could be) a directory */
2157 afs_DequeueCallback(avc);
2158 avc->callback = (struct server *)0;
2159 avc->states &= ~(CStatd|CUnique);
2160 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
2161 osi_dnlc_purgedp (avc); /* if it (could be) a directory */
2163 ReleaseWriteLock(&afs_xcbhash);
2165 afs_PutVolume(volp, READ_LOCK);
2167 else { /* used to undo the local callback, but that's too extreme.
2168 * There are plenty of good reasons that fetchstatus might return
2169 * an error, such as EPERM. If we have the vnode cached, statd,
2170 * with callback, might as well keep track of the fact that we
2171 * don't have access...
2173 if (code == EPERM || code == EACCES) {
2174 struct axscache *ac;
2175 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
2177 else /* not found, add a new one if possible */
2178 afs_AddAxs(avc->Access, areq->uid, 0);
2189 * Stuff some information into the vcache for the given file.
2192 * afid : File in question.
2193 * OutStatus : Fetch status on the file.
2194 * CallBack : Callback info.
2195 * tc : RPC connection involved.
2196 * areq : vrequest involved.
2199 * Nothing interesting.
2202 afs_StuffVcache(afid, OutStatus, CallBack, tc, areq)
2203 register struct VenusFid *afid;
2204 struct AFSFetchStatus *OutStatus;
2205 struct AFSCallBack *CallBack;
2206 register struct conn *tc;
2207 struct vrequest *areq;
2209 { /*afs_StuffVcache*/
2211 register afs_int32 code, i, newvcache=0;
2212 register struct vcache *tvc;
2213 struct AFSVolSync tsync;
2215 struct axscache *ac;
2218 AFS_STATCNT(afs_StuffVcache);
2219 #ifdef IFS_VCACHECOUNT
2224 ObtainSharedLock(&afs_xvcache,8);
2226 tvc = afs_FindVCache(afid, 0, 0, &retry, DO_VLRU /* no stats */);
2228 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2229 ReleaseSharedLock(&afs_xvcache);
2230 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2236 /* no cache entry, better grab one */
2237 UpgradeSToWLock(&afs_xvcache,25);
2238 tvc = afs_NewVCache(afid, (struct server *)0, 1, WRITE_LOCK);
2240 ConvertWToSLock(&afs_xvcache);
2243 ReleaseSharedLock(&afs_xvcache);
2244 ObtainWriteLock(&tvc->lock,58);
2246 tvc->states &= ~CStatd;
2247 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2248 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2250 /* Is it always appropriate to throw away all the access rights? */
2251 afs_FreeAllAxs(&(tvc->Access));
2253 /*Copy useful per-volume info*/
2254 tvp = afs_GetVolume(afid, areq, READ_LOCK);
2256 if (newvcache && (tvp->states & VForeign)) tvc->states |= CForeign;
2257 if (tvp->states & VRO) tvc->states |= CRO;
2258 if (tvp->states & VBackup) tvc->states |= CBackup;
2260 * Now, copy ".." entry back out of volume structure, if
2263 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
2264 if (!tvc->mvid) tvc->mvid =
2265 (struct VenusFid *) osi_AllocSmallSpace(sizeof(struct VenusFid));
2266 *tvc->mvid = tvp->dotdot;
2269 /* store the stat on the file */
2270 afs_RemoveVCB(afid);
2271 afs_ProcessFS(tvc, OutStatus, areq);
2272 tvc->callback = tc->srvr->server;
2274 /* we use osi_Time twice below. Ideally, we would use the time at which
2275 * the FetchStatus call began, instead, but we don't have it here. So we
2276 * make do with "now". In the CRO case, it doesn't really matter. In
2277 * the other case, we hope that the difference between "now" and when the
2278 * call actually began execution on the server won't be larger than the
2279 * padding which the server keeps. Subtract 1 second anyway, to be on
2280 * the safe side. Can't subtract more because we don't know how big
2281 * ExpirationTime is. Possible consistency problems may arise if the call
2282 * timeout period becomes longer than the server's expiration padding. */
2283 ObtainWriteLock(&afs_xcbhash, 470);
2284 if (CallBack->ExpirationTime != 0) {
2285 tvc->cbExpires = CallBack->ExpirationTime+osi_Time()-1;
2286 tvc->states |= CStatd;
2287 tvc->states &= ~CBulkFetching;
2288 afs_QueueCallback(tvc, CBHash(CallBack->ExpirationTime), tvp);
2290 else if (tvc->states & CRO) {
2291 /* old-fashioned AFS 3.2 style */
2292 tvc->cbExpires = 3600+osi_Time(); /*XXX*/
2293 tvc->states |= CStatd;
2294 tvc->states &= ~CBulkFetching;
2295 afs_QueueCallback(tvc, CBHash(3600), tvp);
2298 afs_DequeueCallback(tvc);
2299 tvc->callback = (struct server *)0;
2300 tvc->states &= ~(CStatd|CUnique);
2301 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2302 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2304 ReleaseWriteLock(&afs_xcbhash);
2306 afs_PutVolume(tvp, READ_LOCK);
2308 /* look in per-pag cache */
2309 if (tvc->Access && (ac = afs_FindAxs(tvc->Access, areq->uid)))
2310 ac->axess = OutStatus->CallerAccess; /* substitute pags */
2311 else /* not found, add a new one if possible */
2312 afs_AddAxs(tvc->Access, areq->uid, OutStatus->CallerAccess);
2314 ReleaseWriteLock(&tvc->lock);
2315 afs_Trace4(afs_iclSetp, CM_TRACE_STUFFVCACHE, ICL_TYPE_POINTER, tvc,
2316 ICL_TYPE_POINTER, tvc->callback, ICL_TYPE_INT32, tvc->cbExpires,
2317 ICL_TYPE_INT32, tvc->cbExpires-osi_Time());
2319 * Release ref count... hope this guy stays around...
2321 afs_PutVCache(tvc, WRITE_LOCK);
2322 } /*afs_StuffVcache*/
2329 * Decrements the reference count on a cache entry.
2332 * avc : Pointer to the cache entry to decrement.
2335 * Nothing interesting.
2338 afs_PutVCache(avc, locktype)
2339 register struct vcache *avc;
2343 AFS_STATCNT(afs_PutVCache);
2345 * Can we use a read lock here?
2347 ObtainReadLock(&afs_xvcache);
2349 ReleaseReadLock(&afs_xvcache);
2356 * Find a vcache entry given a fid.
2359 * afid : Pointer to the fid whose cache entry we desire.
2360 * retry: (SGI-specific) tell the caller to drop the lock on xvcache,
2361 * unlock the vnode, and try again.
2362 * flags: bit 1 to specify whether to compute hit statistics. Not
2363 * set if FindVCache is called as part of internal bookkeeping.
2366 * Must be called with the afs_xvcache lock at least held at
2367 * the read level. In order to do the VLRU adjustment, the xvcache lock
2368 * must be shared-- we upgrade it here.
2371 struct vcache *afs_FindVCache(struct VenusFid *afid, afs_int32 lockit,
2372 afs_int32 locktype, afs_int32 *retry, afs_int32 flag)
2375 register struct vcache *tvc;
2378 AFS_STATCNT(afs_FindVCache);
2381 for(tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2382 if (FidMatches(afid, tvc)) {
2384 /* Grab this vnode, possibly reactivating from the free list */
2387 vg = vget((struct vnode *)tvc);
2391 #endif /* AFS_OSF_ENV */
2396 /* should I have a read lock on the vnode here? */
2398 if (retry) *retry = 0;
2399 #if !defined(AFS_OSF_ENV)
2400 osi_vnhold(tvc, retry); /* already held, above */
2401 if (retry && *retry)
2405 * only move to front of vlru if we have proper vcache locking)
2407 if (flag & DO_VLRU) {
2408 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2409 refpanic ("FindVC VLRU inconsistent1");
2411 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2412 refpanic ("FindVC VLRU inconsistent1");
2414 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2415 refpanic ("FindVC VLRU inconsistent2");
2417 UpgradeSToWLock(&afs_xvcache,26);
2418 QRemove(&tvc->vlruq);
2419 QAdd(&VLRU, &tvc->vlruq);
2420 ConvertWToSLock(&afs_xvcache);
2421 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2422 refpanic ("FindVC VLRU inconsistent1");
2424 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2425 refpanic ("FindVC VLRU inconsistent2");
2427 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2428 refpanic ("FindVC VLRU inconsistent3");
2434 if (flag & DO_STATS) {
2435 if (tvc) afs_stats_cmperf.vcacheHits++;
2436 else afs_stats_cmperf.vcacheMisses++;
2437 if (afid->Cell == LOCALCELL)
2438 afs_stats_cmperf.vlocalAccesses++;
2440 afs_stats_cmperf.vremoteAccesses++;
2443 #ifdef AFS_LINUX22_ENV
2444 if (tvc && (tvc->states & CStatd))
2445 vcache2inode(tvc); /* mainly to reset i_nlink */
2447 #ifdef AFS_DARWIN_ENV
2452 } /*afs_FindVCache*/
2458 * Find a vcache entry given a fid. Does a wildcard match on what we
2459 * have for the fid. If more than one entry, don't return anything.
2462 * avcp : Fill in pointer if we found one and only one.
2463 * afid : Pointer to the fid whose cache entry we desire.
2464 * retry: (SGI-specific) tell the caller to drop the lock on xvcache,
2465 * unlock the vnode, and try again.
2466 * flags: bit 1 to specify whether to compute hit statistics. Not
2467 * set if FindVCache is called as part of internal bookkeeping.
2470 * Must be called with the afs_xvcache lock at least held at
2471 * the read level. In order to do the VLRU adjustment, the xvcache lock
2472 * must be shared-- we upgrade it here.
2475 * number of matches found.
2478 int afs_duplicate_nfs_fids=0;
2480 afs_int32 afs_NFSFindVCache(avcp, afid, lockit)
2481 struct vcache **avcp;
2482 struct VenusFid *afid;
2484 { /*afs_FindVCache*/
2486 register struct vcache *tvc;
2488 afs_int32 retry = 0;
2489 afs_int32 count = 0;
2490 struct vcache *found_tvc = NULL;
2492 AFS_STATCNT(afs_FindVCache);
2496 ObtainSharedLock(&afs_xvcache,331);
2499 for(tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2500 /* Match only on what we have.... */
2501 if (((tvc->fid.Fid.Vnode & 0xffff) == afid->Fid.Vnode)
2502 && (tvc->fid.Fid.Volume == afid->Fid.Volume)
2503 && ((tvc->fid.Fid.Unique & 0xffffff) == afid->Fid.Unique)
2504 && (tvc->fid.Cell == afid->Cell)) {
2506 /* Grab this vnode, possibly reactivating from the free list */
2509 vg = vget((struct vnode *)tvc);
2512 /* This vnode no longer exists. */
2515 #endif /* AFS_OSF_ENV */
2520 /* Drop our reference counts. */
2521 vrele((struct vnode *)tvc);
2522 vrele((struct vnode *)found_tvc);
2524 afs_duplicate_nfs_fids++;
2525 ReleaseSharedLock(&afs_xvcache);
2533 /* should I have a read lock on the vnode here? */
2535 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2536 osi_vnhold(tvc, &retry);
2539 found_tvc = (struct vcache*)0;
2540 ReleaseSharedLock(&afs_xvcache);
2541 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2545 #if !defined(AFS_OSF_ENV)
2546 osi_vnhold(tvc, (int*)0); /* already held, above */
2550 * We obtained the xvcache lock above.
2552 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2553 refpanic ("FindVC VLRU inconsistent1");
2555 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2556 refpanic ("FindVC VLRU inconsistent1");
2558 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2559 refpanic ("FindVC VLRU inconsistent2");
2561 UpgradeSToWLock(&afs_xvcache,568);
2562 QRemove(&tvc->vlruq);
2563 QAdd(&VLRU, &tvc->vlruq);
2564 ConvertWToSLock(&afs_xvcache);
2565 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2566 refpanic ("FindVC VLRU inconsistent1");
2568 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2569 refpanic ("FindVC VLRU inconsistent2");
2571 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2572 refpanic ("FindVC VLRU inconsistent3");
2577 if (tvc) afs_stats_cmperf.vcacheHits++;
2578 else afs_stats_cmperf.vcacheMisses++;
2579 if (afid->Cell == LOCALCELL)
2580 afs_stats_cmperf.vlocalAccesses++;
2582 afs_stats_cmperf.vremoteAccesses++;
2584 *avcp = tvc; /* May be null */
2586 ReleaseSharedLock(&afs_xvcache);
2587 return (tvc ? 1 : 0);
2589 } /*afs_NFSFindVCache*/
2597 * Initialize vcache related variables
2599 void afs_vcacheInit(int astatSize)
2601 register struct vcache *tvp;
2603 #if defined(AFS_OSF_ENV)
2604 if (!afs_maxvcount) {
2605 #if defined(AFS_OSF30_ENV)
2606 afs_maxvcount = max_vnodes/2; /* limit ourselves to half the total */
2608 afs_maxvcount = nvnode/2; /* limit ourselves to half the total */
2610 if (astatSize < afs_maxvcount) {
2611 afs_maxvcount = astatSize;
2614 #else /* AFS_OSF_ENV */
2615 freeVCList = (struct vcache *)0;
2618 RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
2619 LOCK_INIT(&afs_xvcb, "afs_xvcb");
2621 #if !defined(AFS_OSF_ENV)
2622 /* Allocate and thread the struct vcache entries */
2623 tvp = (struct vcache *) afs_osi_Alloc(astatSize * sizeof(struct vcache));
2624 memset((char *)tvp, 0, sizeof(struct vcache)*astatSize);
2626 Initial_freeVCList = tvp;
2627 freeVCList = &(tvp[0]);
2628 for(i=0; i < astatSize-1; i++) {
2629 tvp[i].nextfree = &(tvp[i+1]);
2631 tvp[astatSize-1].nextfree = (struct vcache *) 0;
2632 #ifdef AFS_AIX32_ENV
2633 pin((char *)tvp, astatSize * sizeof(struct vcache)); /* XXX */
2638 #if defined(AFS_SGI_ENV)
2639 for(i=0; i < astatSize; i++) {
2640 char name[METER_NAMSZ];
2641 struct vcache *tvc = &tvp[i];
2643 tvc->v.v_number = ++afsvnumbers;
2644 tvc->vc_rwlockid = OSI_NO_LOCKID;
2645 initnsema(&tvc->vc_rwlock, 1, makesname(name, "vrw", tvc->v.v_number));
2646 #ifndef AFS_SGI53_ENV
2647 initnsema(&tvc->v.v_sync, 0, makesname(name, "vsy", tvc->v.v_number));
2649 #ifndef AFS_SGI62_ENV
2650 initnlock(&tvc->v.v_lock, makesname(name, "vlk", tvc->v.v_number));
2651 #endif /* AFS_SGI62_ENV */
2664 void shutdown_vcache(void)
2667 struct afs_cbr *tsp, *nsp;
2669 * XXX We may potentially miss some of the vcaches because if when there're no
2670 * free vcache entries and all the vcache entries are active ones then we allocate
2671 * an additional one - admittedly we almost never had that occur.
2673 #if !defined(AFS_OSF_ENV)
2674 afs_osi_Free(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
2676 #ifdef AFS_AIX32_ENV
2677 unpin(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
2681 register struct afs_q *tq, *uq;
2682 register struct vcache *tvc;
2683 for (tq = VLRU.prev; tq != &VLRU; tq = uq) {
2687 osi_FreeSmallSpace(tvc->mvid);
2688 tvc->mvid = (struct VenusFid*)0;
2691 aix_gnode_rele((struct vnode *)tvc);
2693 if (tvc->linkData) {
2694 afs_osi_Free(tvc->linkData, strlen(tvc->linkData)+1);
2699 * Also free the remaining ones in the Cache
2701 for (i=0; i < VCSIZE; i++) {
2702 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2704 osi_FreeSmallSpace(tvc->mvid);
2705 tvc->mvid = (struct VenusFid*)0;
2709 afs_osi_Free(tvc->v.v_gnode, sizeof(struct gnode));
2710 #ifdef AFS_AIX32_ENV
2713 vms_delete(tvc->segid);
2715 tvc->segid = tvc->vmh = NULL;
2716 if (VREFCOUNT(tvc)) osi_Panic("flushVcache: vm race");
2724 #if defined(AFS_SUN5_ENV)
2730 if (tvc->linkData) {
2731 afs_osi_Free(tvc->linkData, strlen(tvc->linkData)+1);
2735 afs_FreeAllAxs(&(tvc->Access));
2741 * Free any leftover callback queue
2743 for (tsp = afs_cbrSpace; tsp; tsp = nsp ) {
2745 afs_osi_Free((char *)tsp, AFS_NCBRS * sizeof(struct afs_cbr));
2749 #if !defined(AFS_OSF_ENV)
2750 freeVCList = Initial_freeVCList = 0;
2752 RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
2753 LOCK_INIT(&afs_xvcb, "afs_xvcb");