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);
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);
532 * This routine is responsible for allocating a new cache entry
533 * from the free list. It formats the cache entry and inserts it
534 * into the appropriate hash tables. It must be called with
535 * afs_xvcache write-locked so as to prevent several processes from
536 * trying to create a new cache entry simultaneously.
539 * afid : The file id of the file whose cache entry is being
542 /* LOCK: afs_NewVCache afs_xvcache W */
543 struct vcache *afs_NewVCache(struct VenusFid *afid, struct server *serverp,
544 afs_int32 lockit, afs_int32 locktype)
548 afs_int32 anumber = VCACHE_FREE;
550 struct gnode *gnodepnt;
553 struct vm_info * vm_info_ptr;
554 #endif /* AFS_MACH_ENV */
557 #endif /* AFS_OSF_ENV */
558 struct afs_q *tq, *uq;
561 AFS_STATCNT(afs_NewVCache);
562 #ifdef AFS_LINUX22_ENV
564 /* Free some if possible. */
565 struct afs_q *tq, *uq;
566 int i; char *panicstr;
567 int vmax = 2 * afs_cacheStats;
568 int vn = VCACHE_FREE;
571 for(tq = VLRU.prev; tq != &VLRU && vn > 0; tq = uq) {
574 if (tvc->states & CVFlushed)
575 refpanic ("CVFlushed on VLRU");
577 refpanic ("Exceeded pool of AFS vnodes(VLRU cycle?)");
578 else if (QNext(uq) != tq)
579 refpanic ("VLRU inconsistent");
581 if (tvc == afs_globalVp)
584 if ( VREFCOUNT(tvc) && tvc->opens == 0 ) {
585 struct inode *ip = (struct inode*)tvc;
586 if (list_empty(&ip->i_dentry)) {
590 struct list_head *cur;
591 struct list_head *head = &ip->i_dentry;
596 while ((cur = cur->next) != head) {
597 struct dentry *dentry = list_entry(cur, struct dentry, d_alias);
598 if (!DCOUNT(dentry)) {
618 #endif /* AFS_LINUX22_ENV */
621 if (afs_vcount >= afs_maxvcount)
624 * If we are using > 33 % of the total system vnodes for AFS vcache
625 * entries or we are using the maximum number of vcache entries,
626 * then free some. (if our usage is > 33% we should free some, if
627 * our usage is > afs_maxvcount, set elsewhere to 0.5*nvnode,
628 * we _must_ free some -- no choice).
630 if ( (( 3 * afs_vcount ) > nvnode) || ( afs_vcount >= afs_maxvcount ))
633 struct afs_q *tq, *uq;
634 int i; char *panicstr;
637 for(tq = VLRU.prev; tq != &VLRU && anumber > 0; tq = uq) {
640 if (tvc->states & CVFlushed)
641 refpanic ("CVFlushed on VLRU");
642 else if (i++ > afs_maxvcount)
643 refpanic ("Exceeded pool of AFS vnodes(VLRU cycle?)");
644 else if (QNext(uq) != tq)
645 refpanic ("VLRU inconsistent");
646 else if (VREFCOUNT(tvc) < 1)
647 refpanic ("refcnt 0 on VLRU");
649 if ( VREFCOUNT(tvc) == 1 && tvc->opens == 0
650 && (tvc->states & CUnlinkedDel) == 0) {
651 code = afs_FlushVCache(tvc, &fv_slept);
658 continue; /* start over - may have raced. */
663 if (anumber == VCACHE_FREE) {
664 printf("NewVCache: warning none freed, using %d of %d\n",
665 afs_vcount, afs_maxvcount);
666 if (afs_vcount >= afs_maxvcount) {
667 osi_Panic("NewVCache - none freed");
668 /* XXX instead of panicing, should do afs_maxvcount++
669 and magic up another one */
675 if (getnewvnode(MOUNT_AFS, &Afs_vnodeops, &nvc)) {
676 /* What should we do ???? */
677 osi_Panic("afs_NewVCache: no more vnodes");
682 tvc->nextfree = (struct vcache *)0;
684 #else /* AFS_OSF_ENV */
685 /* pull out a free cache entry */
688 for(tq = VLRU.prev; (anumber > 0) && (tq != &VLRU); tq = uq) {
692 if (tvc->states & CVFlushed)
693 refpanic("CVFlushed on VLRU");
694 else if (i++ > 2*afs_cacheStats) /* even allowing for a few xallocs...*/
695 refpanic("Increase -stat parameter of afsd(VLRU cycle?)");
696 else if (QNext(uq) != tq)
697 refpanic("VLRU inconsistent");
699 #ifdef AFS_DARWIN_ENV
700 if (tvc->opens == 0 && ((tvc->states & CUnlinkedDel) == 0) &&
701 VREFCOUNT(tvc) == 1 && UBCINFOEXISTS(&tvc->v)) {
702 osi_VM_TryReclaim(tvc, &fv_slept);
706 continue; /* start over - may have raced. */
710 if (VREFCOUNT(tvc) == 0 && tvc->opens == 0
711 && (tvc->states & CUnlinkedDel) == 0) {
712 code = afs_FlushVCache(tvc, &fv_slept);
719 continue; /* start over - may have raced. */
722 if (tq == uq ) break;
726 /* none free, making one is better than a panic */
727 afs_stats_cmperf.vcacheXAllocs++; /* count in case we have a leak */
728 tvc = (struct vcache *) afs_osi_Alloc(sizeof (struct vcache));
730 pin((char *)tvc, sizeof(struct vcache)); /* XXX */
733 /* In case it still comes here we need to fill this */
734 tvc->v.v_vm_info = VM_INFO_NULL;
735 vm_info_init(tvc->v.v_vm_info);
736 /* perhaps we should also do close_flush on non-NeXT mach systems;
737 * who knows; we don't currently have the sources.
739 #endif /* AFS_MACH_ENV */
740 #if defined(AFS_SGI_ENV)
741 { char name[METER_NAMSZ];
742 memset(tvc, 0, sizeof(struct vcache));
743 tvc->v.v_number = ++afsvnumbers;
744 tvc->vc_rwlockid = OSI_NO_LOCKID;
745 initnsema(&tvc->vc_rwlock, 1, makesname(name, "vrw", tvc->v.v_number));
746 #ifndef AFS_SGI53_ENV
747 initnsema(&tvc->v.v_sync, 0, makesname(name, "vsy", tvc->v.v_number));
749 #ifndef AFS_SGI62_ENV
750 initnlock(&tvc->v.v_lock, makesname(name, "vlk", tvc->v.v_number));
753 #endif /* AFS_SGI_ENV */
756 tvc = freeVCList; /* take from free list */
757 freeVCList = tvc->nextfree;
758 tvc->nextfree = (struct vcache *)0;
760 #endif /* AFS_OSF_ENV */
763 vm_info_ptr = tvc->v.v_vm_info;
764 #endif /* AFS_MACH_ENV */
766 #if !defined(AFS_SGI_ENV) && !defined(AFS_OSF_ENV)
767 memset((char *)tvc, 0, sizeof(struct vcache));
772 RWLOCK_INIT(&tvc->lock, "vcache lock");
773 #if defined(AFS_SUN5_ENV)
774 RWLOCK_INIT(&tvc->vlock, "vcache vlock");
775 #endif /* defined(AFS_SUN5_ENV) */
778 tvc->v.v_vm_info = vm_info_ptr;
779 tvc->v.v_vm_info->pager = MEMORY_OBJECT_NULL;
780 #endif /* AFS_MACH_ENV */
781 tvc->parentVnode = 0;
782 tvc->mvid = (struct VenusFid *) 0;
783 tvc->linkData = (char *) 0;
786 tvc->execsOrWriters = 0;
790 tvc->last_looker = 0;
792 tvc->asynchrony = -1;
794 afs_symhint_inval(tvc);
796 tvc->flushDV.low = tvc->flushDV.high = AFS_MAXDV;
799 tvc->truncPos = AFS_NOTRUNC; /* don't truncate until we need to */
800 hzero(tvc->m.DataVersion); /* in case we copy it into flushDV */
802 /* Hold it for the LRU (should make count 2) */
803 VN_HOLD((struct vnode *)tvc);
804 #else /* AFS_OSF_ENV */
805 VREFCOUNT_SET(tvc, 1); /* us */
806 #endif /* AFS_OSF_ENV */
808 LOCK_INIT(&tvc->pvmlock, "vcache pvmlock");
809 tvc->vmh = tvc->segid = NULL;
812 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
813 #if defined(AFS_SUN5_ENV)
814 rw_init(&tvc->rwlock, "vcache rwlock", RW_DEFAULT, NULL);
816 #if defined(AFS_SUN55_ENV)
817 /* This is required if the kaio (kernel aynchronous io)
818 ** module is installed. Inside the kernel, the function
819 ** check_vp( common/os/aio.c) checks to see if the kernel has
820 ** to provide asynchronous io for this vnode. This
821 ** function extracts the device number by following the
822 ** v_data field of the vnode. If we do not set this field
823 ** then the system panics. The value of the v_data field
824 ** is not really important for AFS vnodes because the kernel
825 ** does not do asynchronous io for regular files. Hence,
826 ** for the time being, we fill up the v_data field with the
827 ** vnode pointer itself. */
828 tvc->v.v_data = (char *)tvc;
829 #endif /* AFS_SUN55_ENV */
831 afs_BozonInit(&tvc->pvnLock, tvc);
835 tvc->callback = serverp; /* to minimize chance that clear
837 /* initialize vnode data, note vrefCount is v.v_count */
839 /* Don't forget to free the gnode space */
840 tvc->v.v_gnode = gnodepnt = (struct gnode *) osi_AllocSmallSpace(sizeof(struct gnode));
841 memset((char *)gnodepnt, 0, sizeof(struct gnode));
844 memset((void*)&(tvc->vc_bhv_desc), 0, sizeof(tvc->vc_bhv_desc));
845 bhv_desc_init(&(tvc->vc_bhv_desc), tvc, tvc, &Afs_vnodeops);
847 vn_bhv_head_init(&(tvc->v.v_bh), "afsvp");
848 vn_bhv_insert_initial(&(tvc->v.v_bh), &(tvc->vc_bhv_desc));
850 bhv_head_init(&(tvc->v.v_bh));
851 bhv_insert_initial(&(tvc->v.v_bh), &(tvc->vc_bhv_desc));
854 tvc->v.v_mreg = tvc->v.v_mregb = (struct pregion*)tvc;
856 tvc->v.v_trace = ktrace_alloc(VNODE_TRACE_SIZE, 0);
858 init_bitlock(&tvc->v.v_pcacheflag, VNODE_PCACHE_LOCKBIT, "afs_pcache",
860 init_mutex(&tvc->v.v_filocksem, MUTEX_DEFAULT, "afsvfl", (long)tvc);
861 init_mutex(&tvc->v.v_buf_lock, MUTEX_DEFAULT, "afsvnbuf", (long)tvc);
863 vnode_pcache_init(&tvc->v);
864 #if defined(DEBUG) && defined(VNODE_INIT_BITLOCK)
865 /* Above define is never true execpt in SGI test kernels. */
866 init_bitlock(&(tvc->v.v_flag, VLOCK, "vnode", tvc->v.v_number);
869 AFS_VN_INIT_BUF_LOCK(&(tvc->v));
872 SetAfsVnode((struct vnode *)tvc);
873 #endif /* AFS_SGI64_ENV */
874 #ifdef AFS_DARWIN_ENV
875 tvc->v.v_ubcinfo = UBC_INFO_NULL;
876 lockinit(&tvc->rwlock, PINOD, "vcache rwlock", 0, 0);
877 cache_purge((struct vnode *)tvc);
880 /* VLISTNONE(&tvc->v); */
881 tvc->v.v_freelist.tqe_next=0;
882 tvc->v.v_freelist.tqe_prev=(struct vnode **)0xdeadb;
883 /*tvc->vrefCount++;*/
886 lockinit(&tvc->rwlock, PINOD, "vcache rwlock", 0, 0);
887 cache_purge((struct vnode *)tvc);
891 tvc->v.v_usecount++; /* steal an extra ref for now so vfree never happens */
892 /* this will prevent the vfs layer from reusing
893 * afs vnodes, but afs will eventually run out of
894 * vcache's and panic...
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 #ifdef STRUCT_INODE_HAS_I_DIRTY_DATA_BUFFERS
962 INIT_LIST_HEAD(&ip->i_dirty_data_buffers);
964 #ifdef STRUCT_INODE_HAS_I_DEVICES
965 INIT_LIST_HEAD(&ip->i_devices);
967 ip->i_data.host = (void*) ip;
968 ip->i_mapping = &ip->i_data;
969 #ifdef STRUCT_INODE_HAS_I_TRUNCATE_SEM
970 init_rwsem(&ip->i_truncate_sem);
973 sema_init(&ip->i_atomic_write, 1);
974 init_waitqueue(&ip->i_wait);
976 INIT_LIST_HEAD(&ip->i_hash);
977 INIT_LIST_HEAD(&ip->i_dentry);
979 ip->i_dev = afs_globalVFS->s_dev;
980 ip->i_sb = afs_globalVFS;
985 osi_dnlc_purgedp(tvc); /* this may be overkill */
986 memset((char *)&(tvc->quick), 0, sizeof(struct vtodc));
987 memset((char *)&(tvc->callsort), 0, sizeof(struct afs_q));
988 tvc->slocks = (struct SimpleLocks *)0;
991 tvc->hnext = afs_vhashT[i];
993 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
994 refpanic ("NewVCache VLRU inconsistent");
996 QAdd(&VLRU, &tvc->vlruq); /* put in lruq */
997 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
998 refpanic ("NewVCache VLRU inconsistent2");
1000 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
1001 refpanic ("NewVCache VLRU inconsistent3");
1003 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
1004 refpanic ("NewVCache VLRU inconsistent4");
1014 * afs_FlushActiveVcaches
1020 * doflocks : Do we handle flocks?
1022 /* LOCK: afs_FlushActiveVcaches afs_xvcache N */
1024 afs_FlushActiveVcaches(doflocks)
1025 register afs_int32 doflocks;
1027 { /*afs_FlushActiveVcaches*/
1029 register struct vcache *tvc;
1031 register struct conn *tc;
1032 register afs_int32 code;
1033 register struct AFS_UCRED *cred;
1034 struct vrequest treq, ureq;
1035 struct AFSVolSync tsync;
1039 AFS_STATCNT(afs_FlushActiveVcaches);
1040 ObtainReadLock(&afs_xvcache);
1041 for(i=0;i<VCSIZE;i++) {
1042 for(tvc = afs_vhashT[i]; tvc; tvc=tvc->hnext) {
1043 if (doflocks && tvc->flockCount != 0) {
1044 /* if this entry has an flock, send a keep-alive call out */
1046 ReleaseReadLock(&afs_xvcache);
1047 ObtainWriteLock(&tvc->lock,51);
1049 afs_InitReq(&treq, &afs_osi_cred);
1050 treq.flags |= O_NONBLOCK;
1052 tc = afs_Conn(&tvc->fid, &treq, SHARED_LOCK);
1054 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_EXTENDLOCK);
1055 #ifdef RX_ENABLE_LOCKS
1057 #endif /* RX_ENABLE_LOCKS */
1059 RXAFS_ExtendLock(tc->id,
1060 (struct AFSFid *) &tvc->fid.Fid,
1062 #ifdef RX_ENABLE_LOCKS
1064 #endif /* RX_ENABLE_LOCKS */
1069 (afs_Analyze(tc, code, &tvc->fid, &treq,
1070 AFS_STATS_FS_RPCIDX_EXTENDLOCK,
1071 SHARED_LOCK, (struct cell *)0));
1073 ReleaseWriteLock(&tvc->lock);
1074 ObtainReadLock(&afs_xvcache);
1078 if ((tvc->states & CCore) || (tvc->states & CUnlinkedDel)) {
1080 * Don't let it evaporate in case someone else is in
1081 * this code. Also, drop the afs_xvcache lock while
1082 * getting vcache locks.
1085 ReleaseReadLock(&afs_xvcache);
1086 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1087 afs_BozonLock(&tvc->pvnLock, tvc);
1089 #if defined(AFS_SGI_ENV)
1091 * That's because if we come in via the CUnlinkedDel bit state path we'll be have 0 refcnt
1093 osi_Assert(VREFCOUNT(tvc) > 0);
1094 AFS_RWLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1096 ObtainWriteLock(&tvc->lock,52);
1097 if (tvc->states & CCore) {
1098 tvc->states &= ~CCore;
1099 /* XXXX Find better place-holder for cred XXXX */
1100 cred = (struct AFS_UCRED *) tvc->linkData;
1101 tvc->linkData = (char *) 0; /* XXX */
1102 afs_InitReq(&ureq, cred);
1103 afs_Trace2(afs_iclSetp, CM_TRACE_ACTCCORE,
1104 ICL_TYPE_POINTER, tvc,
1105 ICL_TYPE_INT32, tvc->execsOrWriters);
1106 code = afs_StoreOnLastReference(tvc, &ureq);
1107 ReleaseWriteLock(&tvc->lock);
1108 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1109 afs_BozonUnlock(&tvc->pvnLock, tvc);
1111 hzero(tvc->flushDV);
1114 if (code && code != VNOVNODE) {
1115 afs_StoreWarn(code, tvc->fid.Fid.Volume,
1116 /* /dev/console */ 1);
1118 } else if (tvc->states & CUnlinkedDel) {
1122 ReleaseWriteLock(&tvc->lock);
1123 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1124 afs_BozonUnlock(&tvc->pvnLock, tvc);
1126 #if defined(AFS_SGI_ENV)
1127 AFS_RWUNLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1129 afs_remunlink(tvc, 0);
1130 #if defined(AFS_SGI_ENV)
1131 AFS_RWLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1135 /* lost (or won, perhaps) the race condition */
1136 ReleaseWriteLock(&tvc->lock);
1137 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1138 afs_BozonUnlock(&tvc->pvnLock, tvc);
1141 #if defined(AFS_SGI_ENV)
1142 AFS_RWUNLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1144 ObtainReadLock(&afs_xvcache);
1150 AFS_RELE((struct vnode *)tvc);
1152 /* Matches write code setting CCore flag */
1156 #ifdef AFS_DARWIN_ENV
1157 if (VREFCOUNT(tvc) == 1 && UBCINFOEXISTS(&tvc->v)) {
1158 if (tvc->opens) panic("flushactive open, hasubc, but refcnt 1");
1159 osi_VM_TryReclaim(tvc,0);
1164 ReleaseReadLock(&afs_xvcache);
1166 } /*afs_FlushActiveVcaches*/
1173 * Make sure a cache entry is up-to-date status-wise.
1175 * NOTE: everywhere that calls this can potentially be sped up
1176 * by checking CStatd first, and avoiding doing the InitReq
1177 * if this is up-to-date.
1179 * Anymore, the only places that call this KNOW already that the
1180 * vcache is not up-to-date, so we don't screw around.
1183 * avc : Ptr to vcache entry to verify.
1187 int afs_VerifyVCache2(struct vcache *avc, struct vrequest *areq)
1189 register struct vcache *tvc;
1191 AFS_STATCNT(afs_VerifyVCache);
1193 #if defined(AFS_OSF_ENV)
1194 ObtainReadLock(&avc->lock);
1195 if (afs_IsWired(avc)) {
1196 ReleaseReadLock(&avc->lock);
1199 ReleaseReadLock(&avc->lock);
1200 #endif /* AFS_OSF_ENV */
1201 /* otherwise we must fetch the status info */
1203 ObtainWriteLock(&avc->lock,53);
1204 if (avc->states & CStatd) {
1205 ReleaseWriteLock(&avc->lock);
1208 ObtainWriteLock(&afs_xcbhash, 461);
1209 avc->states &= ~( CStatd | CUnique );
1210 avc->callback = (struct server *)0;
1211 afs_DequeueCallback(avc);
1212 ReleaseWriteLock(&afs_xcbhash);
1213 ReleaseWriteLock(&avc->lock);
1215 /* since we've been called back, or the callback has expired,
1216 * it's possible that the contents of this directory, or this
1217 * file's name have changed, thus invalidating the dnlc contents.
1219 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
1220 osi_dnlc_purgedp (avc);
1222 osi_dnlc_purgevp (avc);
1224 /* fetch the status info */
1225 tvc = afs_GetVCache(&avc->fid, areq, (afs_int32*)0, avc, READ_LOCK);
1226 if (!tvc) return ENOENT;
1227 /* Put it back; caller has already incremented vrefCount */
1228 afs_PutVCache(tvc, READ_LOCK);
1231 } /*afs_VerifyVCache*/
1238 * Simple copy of stat info into cache.
1241 * avc : Ptr to vcache entry involved.
1242 * astat : Ptr to stat info to copy.
1245 * Nothing interesting.
1247 * Callers: as of 1992-04-29, only called by WriteVCache
1250 afs_SimpleVStat(avc, astat, areq)
1251 register struct vcache *avc;
1252 register struct AFSFetchStatus *astat;
1253 struct vrequest *areq;
1254 { /*afs_SimpleVStat*/
1257 AFS_STATCNT(afs_SimpleVStat);
1260 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1261 && !AFS_VN_MAPPED((vnode_t*)avc))
1263 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc))
1267 #ifdef AFS_64BIT_ClIENT
1268 FillInt64(length, astat->Length_hi, astat->Length);
1269 #else /* AFS_64BIT_CLIENT */
1270 length = astat->Length;
1271 #endif /* AFS_64BIT_CLIENT */
1272 #if defined(AFS_SGI_ENV)
1273 osi_Assert((valusema(&avc->vc_rwlock) <= 0) &&
1274 (OSI_GET_LOCKID() == avc->vc_rwlockid));
1275 if (length < avc->m.Length) {
1276 vnode_t *vp = (vnode_t *)avc;
1278 osi_Assert(WriteLocked(&avc->lock));
1279 ReleaseWriteLock(&avc->lock);
1281 PTOSSVP(vp, (off_t)length, (off_t)MAXLONG);
1283 ObtainWriteLock(&avc->lock,67);
1286 /* if writing the file, don't fetch over this value */
1287 afs_Trace3(afs_iclSetp, CM_TRACE_SIMPLEVSTAT,
1288 ICL_TYPE_POINTER, avc,
1289 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length),
1290 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1291 avc->m.Length = length;
1292 avc->m.Date = astat->ClientModTime;
1294 avc->m.Owner = astat->Owner;
1295 avc->m.Group = astat->Group;
1296 avc->m.Mode = astat->UnixModeBits;
1297 if (vType(avc) == VREG) {
1298 avc->m.Mode |= S_IFREG;
1300 else if (vType(avc) == VDIR) {
1301 avc->m.Mode |= S_IFDIR;
1303 else if (vType(avc) == VLNK) {
1307 avc->m.Mode |= S_IFLNK;
1308 if ((avc->m.Mode & 0111) == 0) avc->mvstat = 1;
1310 if (avc->states & CForeign) {
1311 struct axscache *ac;
1312 avc->anyAccess = astat->AnonymousAccess;
1314 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1316 * Caller has at least one bit not covered by anonymous, and
1317 * thus may have interesting rights.
1319 * HOWEVER, this is a really bad idea, because any access query
1320 * for bits which aren't covered by anonymous, on behalf of a user
1321 * who doesn't have any special rights, will result in an answer of
1322 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1323 * It's an especially bad idea under Ultrix, since (due to the lack of
1324 * a proper access() call) it must perform several afs_access() calls
1325 * in order to create magic mode bits that vary according to who makes
1326 * the call. In other words, _every_ stat() generates a test for
1329 #endif /* badidea */
1330 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1331 ac->axess = astat->CallerAccess;
1332 else /* not found, add a new one if possible */
1333 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1337 } /*afs_SimpleVStat*/
1344 * Store the status info *only* back to the server for a
1348 * avc : Ptr to the vcache entry.
1349 * astatus : Ptr to the status info to store.
1350 * areq : Ptr to the associated vrequest.
1353 * Must be called with a shared lock held on the vnode.
1356 afs_WriteVCache(avc, astatus, areq)
1357 register struct vcache *avc;
1358 register struct AFSStoreStatus *astatus;
1359 struct vrequest *areq;
1361 { /*afs_WriteVCache*/
1364 struct AFSFetchStatus OutStatus;
1365 struct AFSVolSync tsync;
1368 AFS_STATCNT(afs_WriteVCache);
1369 afs_Trace2(afs_iclSetp, CM_TRACE_WVCACHE, ICL_TYPE_POINTER, avc,
1370 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
1373 tc = afs_Conn(&avc->fid, areq, SHARED_LOCK);
1375 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STORESTATUS);
1376 #ifdef RX_ENABLE_LOCKS
1378 #endif /* RX_ENABLE_LOCKS */
1379 code = RXAFS_StoreStatus(tc->id,
1380 (struct AFSFid *) &avc->fid.Fid,
1381 astatus, &OutStatus, &tsync);
1382 #ifdef RX_ENABLE_LOCKS
1384 #endif /* RX_ENABLE_LOCKS */
1389 (afs_Analyze(tc, code, &avc->fid, areq,
1390 AFS_STATS_FS_RPCIDX_STORESTATUS,
1391 SHARED_LOCK, (struct cell *)0));
1393 UpgradeSToWLock(&avc->lock,20);
1395 /* success, do the changes locally */
1396 afs_SimpleVStat(avc, &OutStatus, areq);
1398 * Update the date, too. SimpleVStat didn't do this, since
1399 * it thought we were doing this after fetching new status
1400 * over a file being written.
1402 avc->m.Date = OutStatus.ClientModTime;
1405 /* failure, set up to check with server next time */
1406 ObtainWriteLock(&afs_xcbhash, 462);
1407 afs_DequeueCallback(avc);
1408 avc->states &= ~( CStatd | CUnique); /* turn off stat valid flag */
1409 ReleaseWriteLock(&afs_xcbhash);
1410 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
1411 osi_dnlc_purgedp (avc); /* if it (could be) a directory */
1413 ConvertWToSLock(&avc->lock);
1416 } /*afs_WriteVCache*/
1422 * Copy astat block into vcache info
1425 * avc : Ptr to vcache entry.
1426 * astat : Ptr to stat block to copy in.
1427 * areq : Ptr to associated request.
1430 * Must be called under a write lock
1432 * Note: this code may get dataversion and length out of sync if the file has
1433 * been modified. This is less than ideal. I haven't thought about
1434 * it sufficiently to be certain that it is adequate.
1437 afs_ProcessFS(avc, astat, areq)
1438 register struct vcache *avc;
1439 struct vrequest *areq;
1440 register struct AFSFetchStatus *astat;
1446 AFS_STATCNT(afs_ProcessFS);
1448 #ifdef AFS_64BIT_CLIENT
1449 FillInt64(length, astat->Length_hi, astat->Length);
1450 #else /* AFS_64BIT_CLIENT */
1451 length = astat->Length;
1452 #endif /* AFS_64BIT_CLIENT */
1453 /* WARNING: afs_DoBulkStat uses the Length field to store a sequence
1454 * number for each bulk status request. Under no circumstances
1455 * should afs_DoBulkStat store a sequence number if the new
1456 * length will be ignored when afs_ProcessFS is called with
1457 * new stats. If you change the following conditional then you
1458 * also need to change the conditional in afs_DoBulkStat. */
1460 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1461 && !AFS_VN_MAPPED((vnode_t*)avc))
1463 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc))
1466 /* if we're writing or mapping this file, don't fetch over these
1469 afs_Trace3(afs_iclSetp, CM_TRACE_PROCESSFS, ICL_TYPE_POINTER, avc,
1470 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length),
1471 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1472 avc->m.Length = length;
1473 avc->m.Date = astat->ClientModTime;
1475 hset64(avc->m.DataVersion, astat->dataVersionHigh, astat->DataVersion);
1476 avc->m.Owner = astat->Owner;
1477 avc->m.Mode = astat->UnixModeBits;
1478 avc->m.Group = astat->Group;
1479 avc->m.LinkCount = astat->LinkCount;
1480 if (astat->FileType == File) {
1481 vSetType(avc, VREG);
1482 avc->m.Mode |= S_IFREG;
1484 else if (astat->FileType == Directory) {
1485 vSetType(avc, VDIR);
1486 avc->m.Mode |= S_IFDIR;
1488 else if (astat->FileType == SymbolicLink) {
1489 vSetType(avc, VLNK);
1490 avc->m.Mode |= S_IFLNK;
1491 if ((avc->m.Mode & 0111) == 0) avc->mvstat = 1;
1493 avc->anyAccess = astat->AnonymousAccess;
1495 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1497 * Caller has at least one bit not covered by anonymous, and
1498 * thus may have interesting rights.
1500 * HOWEVER, this is a really bad idea, because any access query
1501 * for bits which aren't covered by anonymous, on behalf of a user
1502 * who doesn't have any special rights, will result in an answer of
1503 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1504 * It's an especially bad idea under Ultrix, since (due to the lack of
1505 * a proper access() call) it must perform several afs_access() calls
1506 * in order to create magic mode bits that vary according to who makes
1507 * the call. In other words, _every_ stat() generates a test for
1510 #endif /* badidea */
1512 struct axscache *ac;
1513 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1514 ac->axess = astat->CallerAccess;
1515 else /* not found, add a new one if possible */
1516 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1519 #ifdef AFS_LINUX22_ENV
1520 vcache2inode(avc); /* Set the inode attr cache */
1526 afs_RemoteLookup(afid, areq, name, nfid, OutStatusp, CallBackp, serverp, tsyncp)
1527 register struct VenusFid *afid;
1528 struct vrequest *areq;
1530 struct VenusFid *nfid;
1531 struct AFSFetchStatus *OutStatusp;
1532 struct AFSCallBack *CallBackp;
1533 struct server **serverp;
1534 struct AFSVolSync *tsyncp;
1537 register struct vcache *tvc;
1540 register struct conn *tc;
1541 struct AFSFetchStatus OutDirStatus;
1544 if (!name) name = ""; /* XXX */
1546 tc = afs_Conn(afid, areq, SHARED_LOCK);
1548 if (serverp) *serverp = tc->srvr->server;
1550 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_XLOOKUP);
1551 #ifdef RX_ENABLE_LOCKS
1553 #endif /* RX_ENABLE_LOCKS */
1554 code = RXAFS_Lookup(tc->id, (struct AFSFid *) &afid->Fid, name,
1555 (struct AFSFid *) &nfid->Fid,
1556 OutStatusp, &OutDirStatus, CallBackp, tsyncp);
1557 #ifdef RX_ENABLE_LOCKS
1559 #endif /* RX_ENABLE_LOCKS */
1564 (afs_Analyze(tc, code, afid, areq,
1565 AFS_STATS_FS_RPCIDX_XLOOKUP,
1566 SHARED_LOCK, (struct cell *)0));
1576 * Given a file id and a vrequest structure, fetch the status
1577 * information associated with the file.
1581 * areq : Ptr to associated vrequest structure, specifying the
1582 * user whose authentication tokens will be used.
1583 * avc : caller may already have a vcache for this file, which is
1587 * The cache entry is returned with an increased vrefCount field.
1588 * The entry must be discarded by calling afs_PutVCache when you
1589 * are through using the pointer to the cache entry.
1591 * You should not hold any locks when calling this function, except
1592 * locks on other vcache entries. If you lock more than one vcache
1593 * entry simultaneously, you should lock them in this order:
1595 * 1. Lock all files first, then directories.
1596 * 2. Within a particular type, lock entries in Fid.Vnode order.
1598 * This locking hierarchy is convenient because it allows locking
1599 * of a parent dir cache entry, given a file (to check its access
1600 * control list). It also allows renames to be handled easily by
1601 * locking directories in a constant order.
1602 * NB. NewVCache -> FlushVCache presently (4/10/95) drops the xvcache lock.
1604 struct vcache *afs_GetVCache(afid, areq, cached, avc, locktype)
1605 register struct VenusFid *afid;
1606 struct vrequest *areq;
1609 struct vcache *avc; /* might have a vcache structure already, which must
1610 * already be held by the caller */
1613 afs_int32 code, i, newvcache=0;
1614 register struct vcache *tvc;
1618 AFS_STATCNT(afs_GetVCache);
1620 if (cached) *cached = 0; /* Init just in case */
1623 ObtainSharedLock(&afs_xvcache,5);
1625 tvc = afs_FindVCache(afid, 0, 0, &retry, DO_STATS | DO_VLRU );
1627 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1628 ReleaseSharedLock(&afs_xvcache);
1629 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1637 if (tvc->states & CStatd) {
1638 ReleaseSharedLock(&afs_xvcache);
1643 UpgradeSToWLock(&afs_xvcache,21);
1645 /* no cache entry, better grab one */
1646 tvc = afs_NewVCache(afid, (struct server *)0, 1, WRITE_LOCK);
1649 ConvertWToSLock(&afs_xvcache);
1650 afs_stats_cmperf.vcacheMisses++;
1653 ReleaseSharedLock(&afs_xvcache);
1655 ObtainWriteLock(&tvc->lock,54);
1657 if (tvc->states & CStatd) {
1658 #ifdef AFS_LINUX22_ENV
1661 ReleaseWriteLock(&tvc->lock);
1662 #ifdef AFS_DARWIN_ENV
1668 #if defined(AFS_OSF_ENV)
1669 if (afs_IsWired(tvc)) {
1670 ReleaseWriteLock(&tvc->lock);
1673 #endif /* AFS_OSF_ENV */
1675 ObtainWriteLock(&afs_xcbhash, 464);
1676 tvc->states &= ~CUnique;
1678 afs_DequeueCallback(tvc);
1679 ReleaseWriteLock(&afs_xcbhash);
1681 /* It is always appropriate to throw away all the access rights? */
1682 afs_FreeAllAxs(&(tvc->Access));
1683 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-volume info */
1685 if ((tvp->states & VForeign)) {
1686 if (newvcache) tvc->states |= CForeign;
1687 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
1688 && (tvp->rootUnique == afid->Fid.Unique)) {
1692 if (tvp->states & VRO) tvc->states |= CRO;
1693 if (tvp->states & VBackup) tvc->states |= CBackup;
1694 /* now copy ".." entry back out of volume structure, if necessary */
1695 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
1697 tvc->mvid = (struct VenusFid *)
1698 osi_AllocSmallSpace(sizeof(struct VenusFid));
1699 *tvc->mvid = tvp->dotdot;
1701 afs_PutVolume(tvp, READ_LOCK);
1705 afs_RemoveVCB(afid);
1707 struct AFSFetchStatus OutStatus;
1709 if (afs_DynrootNewVnode(tvc, &OutStatus)) {
1710 afs_ProcessFS(tvc, &OutStatus, areq);
1711 tvc->states |= CStatd | CUnique;
1714 code = afs_FetchStatus(tvc, afid, areq, &OutStatus);
1719 ReleaseWriteLock(&tvc->lock);
1721 ObtainReadLock(&afs_xvcache);
1723 ReleaseReadLock(&afs_xvcache);
1724 return (struct vcache *) 0;
1727 ReleaseWriteLock(&tvc->lock);
1728 #ifdef AFS_DARWIN_ENV
1737 struct vcache *afs_LookupVCache(struct VenusFid *afid, struct vrequest *areq,
1738 afs_int32 *cached, afs_int32 locktype,
1739 struct vcache *adp, char *aname)
1741 afs_int32 code, now, newvcache=0, hash;
1742 struct VenusFid nfid;
1743 register struct vcache *tvc;
1745 struct AFSFetchStatus OutStatus;
1746 struct AFSCallBack CallBack;
1747 struct AFSVolSync tsync;
1748 struct server *serverp = 0;
1752 AFS_STATCNT(afs_GetVCache);
1753 if (cached) *cached = 0; /* Init just in case */
1756 ObtainReadLock(&afs_xvcache);
1757 tvc = afs_FindVCache(afid, 0, 0, &retry, DO_STATS /* no vlru */);
1760 ReleaseReadLock(&afs_xvcache);
1762 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1763 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1767 ObtainReadLock(&tvc->lock);
1769 if (tvc->states & CStatd) {
1773 ReleaseReadLock(&tvc->lock);
1776 tvc->states &= ~CUnique;
1778 ReleaseReadLock(&tvc->lock);
1779 ObtainReadLock(&afs_xvcache);
1783 ReleaseReadLock(&afs_xvcache);
1785 /* lookup the file */
1788 origCBs = afs_allCBs; /* if anything changes, we don't have a cb */
1789 code = afs_RemoteLookup(&adp->fid, areq, aname, &nfid, &OutStatus, &CallBack,
1793 ObtainSharedLock(&afs_xvcache,6);
1794 tvc = afs_FindVCache(&nfid, 0, 0, &retry, DO_VLRU /* no xstats now*/);
1796 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1797 ReleaseSharedLock(&afs_xvcache);
1798 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1804 /* no cache entry, better grab one */
1805 UpgradeSToWLock(&afs_xvcache,22);
1806 tvc = afs_NewVCache(&nfid, (struct server *)0, 1, WRITE_LOCK);
1808 ConvertWToSLock(&afs_xvcache);
1811 ReleaseSharedLock(&afs_xvcache);
1812 ObtainWriteLock(&tvc->lock,55);
1814 /* It is always appropriate to throw away all the access rights? */
1815 afs_FreeAllAxs(&(tvc->Access));
1816 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-vol info */
1818 if ((tvp->states & VForeign)) {
1819 if (newvcache) tvc->states |= CForeign;
1820 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
1821 && (tvp->rootUnique == afid->Fid.Unique))
1824 if (tvp->states & VRO) tvc->states |= CRO;
1825 if (tvp->states & VBackup) tvc->states |= CBackup;
1826 /* now copy ".." entry back out of volume structure, if necessary */
1827 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
1829 tvc->mvid = (struct VenusFid *)
1830 osi_AllocSmallSpace(sizeof(struct VenusFid));
1831 *tvc->mvid = tvp->dotdot;
1836 ObtainWriteLock(&afs_xcbhash, 465);
1837 afs_DequeueCallback(tvc);
1838 tvc->states &= ~( CStatd | CUnique );
1839 ReleaseWriteLock(&afs_xcbhash);
1840 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
1841 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
1843 afs_PutVolume(tvp, READ_LOCK);
1844 ReleaseWriteLock(&tvc->lock);
1845 ObtainReadLock(&afs_xvcache);
1847 ReleaseReadLock(&afs_xvcache);
1848 return (struct vcache *) 0;
1851 ObtainWriteLock(&afs_xcbhash, 466);
1852 if (origCBs == afs_allCBs) {
1853 if (CallBack.ExpirationTime) {
1854 tvc->callback = serverp;
1855 tvc->cbExpires = CallBack.ExpirationTime+now;
1856 tvc->states |= CStatd | CUnique;
1857 tvc->states &= ~CBulkFetching;
1858 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvp);
1859 } else if (tvc->states & CRO) {
1860 /* adapt gives us an hour. */
1861 tvc->cbExpires = 3600+osi_Time(); /*XXX*/
1862 tvc->states |= CStatd | CUnique;
1863 tvc->states &= ~CBulkFetching;
1864 afs_QueueCallback(tvc, CBHash(3600), tvp);
1866 tvc->callback = (struct server *)0;
1867 afs_DequeueCallback(tvc);
1868 tvc->states &= ~(CStatd | CUnique);
1869 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
1870 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
1873 afs_DequeueCallback(tvc);
1874 tvc->states &= ~CStatd;
1875 tvc->states &= ~CUnique;
1876 tvc->callback = (struct server *)0;
1877 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
1878 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
1880 ReleaseWriteLock(&afs_xcbhash);
1882 afs_PutVolume(tvp, READ_LOCK);
1883 afs_ProcessFS(tvc, &OutStatus, areq);
1885 ReleaseWriteLock(&tvc->lock);
1886 #ifdef AFS_DARWIN_ENV
1893 struct vcache *afs_GetRootVCache(struct VenusFid *afid,
1894 struct vrequest *areq, afs_int32 *cached,
1895 struct volume *tvolp, afs_int32 locktype)
1897 afs_int32 code, i, newvcache = 0, haveStatus = 0;
1898 afs_int32 getNewFid = 0;
1900 struct VenusFid nfid;
1901 register struct vcache *tvc;
1902 struct server *serverp = 0;
1903 struct AFSFetchStatus OutStatus;
1904 struct AFSCallBack CallBack;
1905 struct AFSVolSync tsync;
1911 if (!tvolp->rootVnode || getNewFid) {
1912 struct VenusFid tfid;
1915 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
1916 origCBs = afs_allCBs; /* ignore InitCallBackState */
1917 code = afs_RemoteLookup(&tfid, areq, (char *)0, &nfid,
1918 &OutStatus, &CallBack, &serverp, &tsync);
1920 return (struct vcache *)0;
1922 /* ReleaseReadLock(&tvolp->lock); */
1923 ObtainWriteLock(&tvolp->lock,56);
1924 tvolp->rootVnode = afid->Fid.Vnode = nfid.Fid.Vnode;
1925 tvolp->rootUnique = afid->Fid.Unique = nfid.Fid.Unique;
1926 ReleaseWriteLock(&tvolp->lock);
1927 /* ObtainReadLock(&tvolp->lock);*/
1930 afid->Fid.Vnode = tvolp->rootVnode;
1931 afid->Fid.Unique = tvolp->rootUnique;
1934 ObtainSharedLock(&afs_xvcache,7);
1936 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
1937 if (!FidCmp(&(tvc->fid), afid)) {
1939 /* Grab this vnode, possibly reactivating from the free list */
1940 /* for the present (95.05.25) everything on the hash table is
1941 * definitively NOT in the free list -- at least until afs_reclaim
1942 * can be safely implemented */
1945 vg = vget((struct vnode *)tvc); /* this bumps ref count */
1949 #endif /* AFS_OSF_ENV */
1954 if (!haveStatus && (!tvc || !(tvc->states & CStatd))) {
1955 /* Mount point no longer stat'd or unknown. FID may have changed. */
1960 tvc = (struct vcache*)0;
1962 ReleaseSharedLock(&afs_xvcache);
1967 UpgradeSToWLock(&afs_xvcache,23);
1968 /* no cache entry, better grab one */
1969 tvc = afs_NewVCache(afid, (struct server *)0, 1, WRITE_LOCK);
1971 afs_stats_cmperf.vcacheMisses++;
1974 if (cached) *cached = 1;
1975 afs_stats_cmperf.vcacheHits++;
1977 /* we already bumped the ref count in the for loop above */
1978 #else /* AFS_OSF_ENV */
1981 UpgradeSToWLock(&afs_xvcache,24);
1982 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
1983 refpanic ("GRVC VLRU inconsistent0");
1985 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
1986 refpanic ("GRVC VLRU inconsistent1");
1988 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
1989 refpanic ("GRVC VLRU inconsistent2");
1991 QRemove(&tvc->vlruq); /* move to lruq head */
1992 QAdd(&VLRU, &tvc->vlruq);
1993 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
1994 refpanic ("GRVC VLRU inconsistent3");
1996 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
1997 refpanic ("GRVC VLRU inconsistent4");
1999 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2000 refpanic ("GRVC VLRU inconsistent5");
2005 ReleaseWriteLock(&afs_xvcache);
2007 if (tvc->states & CStatd) {
2011 ObtainReadLock(&tvc->lock);
2012 tvc->states &= ~CUnique;
2013 tvc->callback = (struct server *)0; /* redundant, perhaps */
2014 ReleaseReadLock(&tvc->lock);
2017 ObtainWriteLock(&tvc->lock,57);
2019 /* It is always appropriate to throw away all the access rights? */
2020 afs_FreeAllAxs(&(tvc->Access));
2022 if (newvcache) tvc->states |= CForeign;
2023 if (tvolp->states & VRO) tvc->states |= CRO;
2024 if (tvolp->states & VBackup) tvc->states |= CBackup;
2025 /* now copy ".." entry back out of volume structure, if necessary */
2026 if (newvcache && (tvolp->rootVnode == afid->Fid.Vnode)
2027 && (tvolp->rootUnique == afid->Fid.Unique)) {
2030 if (tvc->mvstat == 2 && tvolp->dotdot.Fid.Volume != 0) {
2032 tvc->mvid = (struct VenusFid *)osi_AllocSmallSpace(sizeof(struct VenusFid));
2033 *tvc->mvid = tvolp->dotdot;
2037 afs_RemoveVCB(afid);
2040 struct VenusFid tfid;
2043 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
2044 origCBs = afs_allCBs; /* ignore InitCallBackState */
2045 code = afs_RemoteLookup(&tfid, areq, (char *)0, &nfid, &OutStatus,
2046 &CallBack, &serverp, &tsync);
2050 ObtainWriteLock(&afs_xcbhash, 467);
2051 afs_DequeueCallback(tvc);
2052 tvc->callback = (struct server *)0;
2053 tvc->states &= ~(CStatd|CUnique);
2054 ReleaseWriteLock(&afs_xcbhash);
2055 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2056 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2057 ReleaseWriteLock(&tvc->lock);
2058 ObtainReadLock(&afs_xvcache);
2060 ReleaseReadLock(&afs_xvcache);
2061 return (struct vcache *) 0;
2064 ObtainWriteLock(&afs_xcbhash, 468);
2065 if (origCBs == afs_allCBs) {
2066 tvc->states |= CTruth;
2067 tvc->callback = serverp;
2068 if (CallBack.ExpirationTime != 0) {
2069 tvc->cbExpires = CallBack.ExpirationTime+start;
2070 tvc->states |= CStatd;
2071 tvc->states &= ~CBulkFetching;
2072 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvolp);
2073 } else if (tvc->states & CRO) {
2074 /* adapt gives us an hour. */
2075 tvc->cbExpires = 3600+osi_Time(); /*XXX*/
2076 tvc->states |= CStatd;
2077 tvc->states &= ~CBulkFetching;
2078 afs_QueueCallback(tvc, CBHash(3600), tvolp);
2081 afs_DequeueCallback(tvc);
2082 tvc->callback = (struct server *)0;
2083 tvc->states &= ~(CStatd | CUnique);
2084 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2085 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2087 ReleaseWriteLock(&afs_xcbhash);
2088 afs_ProcessFS(tvc, &OutStatus, areq);
2090 ReleaseWriteLock(&tvc->lock);
2097 * must be called with avc write-locked
2098 * don't absolutely have to invalidate the hint unless the dv has
2099 * changed, but be sure to get it right else there will be consistency bugs.
2101 afs_int32 afs_FetchStatus(struct vcache *avc, struct VenusFid *afid,
2102 struct vrequest *areq, struct AFSFetchStatus *Outsp)
2106 register struct conn *tc;
2107 struct AFSCallBack CallBack;
2108 struct AFSVolSync tsync;
2109 struct volume* volp;
2113 tc = afs_Conn(afid, areq, SHARED_LOCK);
2114 avc->quick.stamp = 0; avc->h1.dchint = NULL; /* invalidate hints */
2116 avc->callback = tc->srvr->server;
2118 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_FETCHSTATUS);
2119 #ifdef RX_ENABLE_LOCKS
2121 #endif /* RX_ENABLE_LOCKS */
2122 code = RXAFS_FetchStatus(tc->id,
2123 (struct AFSFid *) &afid->Fid,
2124 Outsp, &CallBack, &tsync);
2125 #ifdef RX_ENABLE_LOCKS
2127 #endif /* RX_ENABLE_LOCKS */
2134 (afs_Analyze(tc, code, afid, areq,
2135 AFS_STATS_FS_RPCIDX_FETCHSTATUS,
2136 SHARED_LOCK, (struct cell *)0));
2139 afs_ProcessFS(avc, Outsp, areq);
2140 volp = afs_GetVolume(afid, areq, READ_LOCK);
2141 ObtainWriteLock(&afs_xcbhash, 469);
2142 avc->states |= CTruth;
2143 if (avc->callback /* check for race */) {
2144 if (CallBack.ExpirationTime != 0) {
2145 avc->cbExpires = CallBack.ExpirationTime+start;
2146 avc->states |= CStatd;
2147 avc->states &= ~CBulkFetching;
2148 afs_QueueCallback(avc, CBHash(CallBack.ExpirationTime), volp);
2150 else if (avc->states & CRO)
2151 { /* ordinary callback on a read-only volume -- AFS 3.2 style */
2152 avc->cbExpires = 3600+start;
2153 avc->states |= CStatd;
2154 avc->states &= ~CBulkFetching;
2155 afs_QueueCallback(avc, CBHash(3600), volp);
2158 afs_DequeueCallback(avc);
2159 avc->callback = (struct server *)0;
2160 avc->states &= ~(CStatd|CUnique);
2161 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
2162 osi_dnlc_purgedp (avc); /* if it (could be) a directory */
2166 afs_DequeueCallback(avc);
2167 avc->callback = (struct server *)0;
2168 avc->states &= ~(CStatd|CUnique);
2169 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
2170 osi_dnlc_purgedp (avc); /* if it (could be) a directory */
2172 ReleaseWriteLock(&afs_xcbhash);
2174 afs_PutVolume(volp, READ_LOCK);
2176 else { /* used to undo the local callback, but that's too extreme.
2177 * There are plenty of good reasons that fetchstatus might return
2178 * an error, such as EPERM. If we have the vnode cached, statd,
2179 * with callback, might as well keep track of the fact that we
2180 * don't have access...
2182 if (code == EPERM || code == EACCES) {
2183 struct axscache *ac;
2184 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
2186 else /* not found, add a new one if possible */
2187 afs_AddAxs(avc->Access, areq->uid, 0);
2198 * Stuff some information into the vcache for the given file.
2201 * afid : File in question.
2202 * OutStatus : Fetch status on the file.
2203 * CallBack : Callback info.
2204 * tc : RPC connection involved.
2205 * areq : vrequest involved.
2208 * Nothing interesting.
2211 afs_StuffVcache(afid, OutStatus, CallBack, tc, areq)
2212 register struct VenusFid *afid;
2213 struct AFSFetchStatus *OutStatus;
2214 struct AFSCallBack *CallBack;
2215 register struct conn *tc;
2216 struct vrequest *areq;
2218 { /*afs_StuffVcache*/
2220 register afs_int32 code, i, newvcache=0;
2221 register struct vcache *tvc;
2222 struct AFSVolSync tsync;
2224 struct axscache *ac;
2227 AFS_STATCNT(afs_StuffVcache);
2228 #ifdef IFS_VCACHECOUNT
2233 ObtainSharedLock(&afs_xvcache,8);
2235 tvc = afs_FindVCache(afid, 0, 0, &retry, DO_VLRU /* no stats */);
2237 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2238 ReleaseSharedLock(&afs_xvcache);
2239 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2245 /* no cache entry, better grab one */
2246 UpgradeSToWLock(&afs_xvcache,25);
2247 tvc = afs_NewVCache(afid, (struct server *)0, 1, WRITE_LOCK);
2249 ConvertWToSLock(&afs_xvcache);
2252 ReleaseSharedLock(&afs_xvcache);
2253 ObtainWriteLock(&tvc->lock,58);
2255 tvc->states &= ~CStatd;
2256 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2257 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2259 /* Is it always appropriate to throw away all the access rights? */
2260 afs_FreeAllAxs(&(tvc->Access));
2262 /*Copy useful per-volume info*/
2263 tvp = afs_GetVolume(afid, areq, READ_LOCK);
2265 if (newvcache && (tvp->states & VForeign)) tvc->states |= CForeign;
2266 if (tvp->states & VRO) tvc->states |= CRO;
2267 if (tvp->states & VBackup) tvc->states |= CBackup;
2269 * Now, copy ".." entry back out of volume structure, if
2272 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
2273 if (!tvc->mvid) tvc->mvid =
2274 (struct VenusFid *) osi_AllocSmallSpace(sizeof(struct VenusFid));
2275 *tvc->mvid = tvp->dotdot;
2278 /* store the stat on the file */
2279 afs_RemoveVCB(afid);
2280 afs_ProcessFS(tvc, OutStatus, areq);
2281 tvc->callback = tc->srvr->server;
2283 /* we use osi_Time twice below. Ideally, we would use the time at which
2284 * the FetchStatus call began, instead, but we don't have it here. So we
2285 * make do with "now". In the CRO case, it doesn't really matter. In
2286 * the other case, we hope that the difference between "now" and when the
2287 * call actually began execution on the server won't be larger than the
2288 * padding which the server keeps. Subtract 1 second anyway, to be on
2289 * the safe side. Can't subtract more because we don't know how big
2290 * ExpirationTime is. Possible consistency problems may arise if the call
2291 * timeout period becomes longer than the server's expiration padding. */
2292 ObtainWriteLock(&afs_xcbhash, 470);
2293 if (CallBack->ExpirationTime != 0) {
2294 tvc->cbExpires = CallBack->ExpirationTime+osi_Time()-1;
2295 tvc->states |= CStatd;
2296 tvc->states &= ~CBulkFetching;
2297 afs_QueueCallback(tvc, CBHash(CallBack->ExpirationTime), tvp);
2299 else if (tvc->states & CRO) {
2300 /* old-fashioned AFS 3.2 style */
2301 tvc->cbExpires = 3600+osi_Time(); /*XXX*/
2302 tvc->states |= CStatd;
2303 tvc->states &= ~CBulkFetching;
2304 afs_QueueCallback(tvc, CBHash(3600), tvp);
2307 afs_DequeueCallback(tvc);
2308 tvc->callback = (struct server *)0;
2309 tvc->states &= ~(CStatd|CUnique);
2310 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2311 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2313 ReleaseWriteLock(&afs_xcbhash);
2315 afs_PutVolume(tvp, READ_LOCK);
2317 /* look in per-pag cache */
2318 if (tvc->Access && (ac = afs_FindAxs(tvc->Access, areq->uid)))
2319 ac->axess = OutStatus->CallerAccess; /* substitute pags */
2320 else /* not found, add a new one if possible */
2321 afs_AddAxs(tvc->Access, areq->uid, OutStatus->CallerAccess);
2323 ReleaseWriteLock(&tvc->lock);
2324 afs_Trace4(afs_iclSetp, CM_TRACE_STUFFVCACHE, ICL_TYPE_POINTER, tvc,
2325 ICL_TYPE_POINTER, tvc->callback, ICL_TYPE_INT32, tvc->cbExpires,
2326 ICL_TYPE_INT32, tvc->cbExpires-osi_Time());
2328 * Release ref count... hope this guy stays around...
2330 afs_PutVCache(tvc, WRITE_LOCK);
2331 } /*afs_StuffVcache*/
2338 * Decrements the reference count on a cache entry.
2341 * avc : Pointer to the cache entry to decrement.
2344 * Nothing interesting.
2347 afs_PutVCache(avc, locktype)
2348 register struct vcache *avc;
2352 AFS_STATCNT(afs_PutVCache);
2354 * Can we use a read lock here?
2356 ObtainReadLock(&afs_xvcache);
2358 ReleaseReadLock(&afs_xvcache);
2365 * Find a vcache entry given a fid.
2368 * afid : Pointer to the fid whose cache entry we desire.
2369 * retry: (SGI-specific) tell the caller to drop the lock on xvcache,
2370 * unlock the vnode, and try again.
2371 * flags: bit 1 to specify whether to compute hit statistics. Not
2372 * set if FindVCache is called as part of internal bookkeeping.
2375 * Must be called with the afs_xvcache lock at least held at
2376 * the read level. In order to do the VLRU adjustment, the xvcache lock
2377 * must be shared-- we upgrade it here.
2380 struct vcache *afs_FindVCache(struct VenusFid *afid, afs_int32 lockit,
2381 afs_int32 locktype, afs_int32 *retry, afs_int32 flag)
2384 register struct vcache *tvc;
2387 AFS_STATCNT(afs_FindVCache);
2390 for(tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2391 if (FidMatches(afid, tvc)) {
2393 /* Grab this vnode, possibly reactivating from the free list */
2396 vg = vget((struct vnode *)tvc);
2400 #endif /* AFS_OSF_ENV */
2405 /* should I have a read lock on the vnode here? */
2407 if (retry) *retry = 0;
2408 #if !defined(AFS_OSF_ENV)
2409 osi_vnhold(tvc, retry); /* already held, above */
2410 if (retry && *retry)
2414 * only move to front of vlru if we have proper vcache locking)
2416 if (flag & DO_VLRU) {
2417 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2418 refpanic ("FindVC VLRU inconsistent1");
2420 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2421 refpanic ("FindVC VLRU inconsistent1");
2423 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2424 refpanic ("FindVC VLRU inconsistent2");
2426 UpgradeSToWLock(&afs_xvcache,26);
2427 QRemove(&tvc->vlruq);
2428 QAdd(&VLRU, &tvc->vlruq);
2429 ConvertWToSLock(&afs_xvcache);
2430 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2431 refpanic ("FindVC VLRU inconsistent1");
2433 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2434 refpanic ("FindVC VLRU inconsistent2");
2436 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2437 refpanic ("FindVC VLRU inconsistent3");
2443 if (flag & DO_STATS) {
2444 if (tvc) afs_stats_cmperf.vcacheHits++;
2445 else afs_stats_cmperf.vcacheMisses++;
2446 if (afid->Cell == LOCALCELL)
2447 afs_stats_cmperf.vlocalAccesses++;
2449 afs_stats_cmperf.vremoteAccesses++;
2452 #ifdef AFS_LINUX22_ENV
2453 if (tvc && (tvc->states & CStatd))
2454 vcache2inode(tvc); /* mainly to reset i_nlink */
2456 #ifdef AFS_DARWIN_ENV
2461 } /*afs_FindVCache*/
2467 * Find a vcache entry given a fid. Does a wildcard match on what we
2468 * have for the fid. If more than one entry, don't return anything.
2471 * avcp : Fill in pointer if we found one and only one.
2472 * afid : Pointer to the fid whose cache entry we desire.
2473 * retry: (SGI-specific) tell the caller to drop the lock on xvcache,
2474 * unlock the vnode, and try again.
2475 * flags: bit 1 to specify whether to compute hit statistics. Not
2476 * set if FindVCache is called as part of internal bookkeeping.
2479 * Must be called with the afs_xvcache lock at least held at
2480 * the read level. In order to do the VLRU adjustment, the xvcache lock
2481 * must be shared-- we upgrade it here.
2484 * number of matches found.
2487 int afs_duplicate_nfs_fids=0;
2489 afs_int32 afs_NFSFindVCache(avcp, afid, lockit)
2490 struct vcache **avcp;
2491 struct VenusFid *afid;
2493 { /*afs_FindVCache*/
2495 register struct vcache *tvc;
2497 afs_int32 retry = 0;
2498 afs_int32 count = 0;
2499 struct vcache *found_tvc = NULL;
2501 AFS_STATCNT(afs_FindVCache);
2505 ObtainSharedLock(&afs_xvcache,331);
2508 for(tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2509 /* Match only on what we have.... */
2510 if (((tvc->fid.Fid.Vnode & 0xffff) == afid->Fid.Vnode)
2511 && (tvc->fid.Fid.Volume == afid->Fid.Volume)
2512 && ((tvc->fid.Fid.Unique & 0xffffff) == afid->Fid.Unique)
2513 && (tvc->fid.Cell == afid->Cell)) {
2515 /* Grab this vnode, possibly reactivating from the free list */
2518 vg = vget((struct vnode *)tvc);
2521 /* This vnode no longer exists. */
2524 #endif /* AFS_OSF_ENV */
2529 /* Drop our reference counts. */
2530 vrele((struct vnode *)tvc);
2531 vrele((struct vnode *)found_tvc);
2533 afs_duplicate_nfs_fids++;
2534 ReleaseSharedLock(&afs_xvcache);
2542 /* should I have a read lock on the vnode here? */
2544 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2545 osi_vnhold(tvc, &retry);
2548 found_tvc = (struct vcache*)0;
2549 ReleaseSharedLock(&afs_xvcache);
2550 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2554 #if !defined(AFS_OSF_ENV)
2555 osi_vnhold(tvc, (int*)0); /* already held, above */
2559 * We obtained the xvcache lock above.
2561 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2562 refpanic ("FindVC VLRU inconsistent1");
2564 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2565 refpanic ("FindVC VLRU inconsistent1");
2567 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2568 refpanic ("FindVC VLRU inconsistent2");
2570 UpgradeSToWLock(&afs_xvcache,568);
2571 QRemove(&tvc->vlruq);
2572 QAdd(&VLRU, &tvc->vlruq);
2573 ConvertWToSLock(&afs_xvcache);
2574 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2575 refpanic ("FindVC VLRU inconsistent1");
2577 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2578 refpanic ("FindVC VLRU inconsistent2");
2580 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2581 refpanic ("FindVC VLRU inconsistent3");
2586 if (tvc) afs_stats_cmperf.vcacheHits++;
2587 else afs_stats_cmperf.vcacheMisses++;
2588 if (afid->Cell == LOCALCELL)
2589 afs_stats_cmperf.vlocalAccesses++;
2591 afs_stats_cmperf.vremoteAccesses++;
2593 *avcp = tvc; /* May be null */
2595 ReleaseSharedLock(&afs_xvcache);
2596 return (tvc ? 1 : 0);
2598 } /*afs_NFSFindVCache*/
2606 * Initialize vcache related variables
2608 void afs_vcacheInit(int astatSize)
2610 register struct vcache *tvp;
2612 #if defined(AFS_OSF_ENV)
2613 if (!afs_maxvcount) {
2614 #if defined(AFS_OSF30_ENV)
2615 afs_maxvcount = max_vnodes/2; /* limit ourselves to half the total */
2617 afs_maxvcount = nvnode/2; /* limit ourselves to half the total */
2619 if (astatSize < afs_maxvcount) {
2620 afs_maxvcount = astatSize;
2623 #else /* AFS_OSF_ENV */
2624 freeVCList = (struct vcache *)0;
2627 RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
2628 LOCK_INIT(&afs_xvcb, "afs_xvcb");
2630 #if !defined(AFS_OSF_ENV)
2631 /* Allocate and thread the struct vcache entries */
2632 tvp = (struct vcache *) afs_osi_Alloc(astatSize * sizeof(struct vcache));
2633 memset((char *)tvp, 0, sizeof(struct vcache)*astatSize);
2635 Initial_freeVCList = tvp;
2636 freeVCList = &(tvp[0]);
2637 for(i=0; i < astatSize-1; i++) {
2638 tvp[i].nextfree = &(tvp[i+1]);
2640 tvp[astatSize-1].nextfree = (struct vcache *) 0;
2641 #ifdef AFS_AIX32_ENV
2642 pin((char *)tvp, astatSize * sizeof(struct vcache)); /* XXX */
2647 #if defined(AFS_SGI_ENV)
2648 for(i=0; i < astatSize; i++) {
2649 char name[METER_NAMSZ];
2650 struct vcache *tvc = &tvp[i];
2652 tvc->v.v_number = ++afsvnumbers;
2653 tvc->vc_rwlockid = OSI_NO_LOCKID;
2654 initnsema(&tvc->vc_rwlock, 1, makesname(name, "vrw", tvc->v.v_number));
2655 #ifndef AFS_SGI53_ENV
2656 initnsema(&tvc->v.v_sync, 0, makesname(name, "vsy", tvc->v.v_number));
2658 #ifndef AFS_SGI62_ENV
2659 initnlock(&tvc->v.v_lock, makesname(name, "vlk", tvc->v.v_number));
2660 #endif /* AFS_SGI62_ENV */
2673 void shutdown_vcache(void)
2676 struct afs_cbr *tsp, *nsp;
2678 * XXX We may potentially miss some of the vcaches because if when there're no
2679 * free vcache entries and all the vcache entries are active ones then we allocate
2680 * an additional one - admittedly we almost never had that occur.
2682 #if !defined(AFS_OSF_ENV)
2683 afs_osi_Free(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
2685 #ifdef AFS_AIX32_ENV
2686 unpin(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
2690 register struct afs_q *tq, *uq;
2691 register struct vcache *tvc;
2692 for (tq = VLRU.prev; tq != &VLRU; tq = uq) {
2696 osi_FreeSmallSpace(tvc->mvid);
2697 tvc->mvid = (struct VenusFid*)0;
2700 aix_gnode_rele((struct vnode *)tvc);
2702 if (tvc->linkData) {
2703 afs_osi_Free(tvc->linkData, strlen(tvc->linkData)+1);
2708 * Also free the remaining ones in the Cache
2710 for (i=0; i < VCSIZE; i++) {
2711 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2713 osi_FreeSmallSpace(tvc->mvid);
2714 tvc->mvid = (struct VenusFid*)0;
2718 afs_osi_Free(tvc->v.v_gnode, sizeof(struct gnode));
2719 #ifdef AFS_AIX32_ENV
2722 vms_delete(tvc->segid);
2724 tvc->segid = tvc->vmh = NULL;
2725 if (VREFCOUNT(tvc)) osi_Panic("flushVcache: vm race");
2733 #if defined(AFS_SUN5_ENV)
2739 if (tvc->linkData) {
2740 afs_osi_Free(tvc->linkData, strlen(tvc->linkData)+1);
2744 afs_FreeAllAxs(&(tvc->Access));
2750 * Free any leftover callback queue
2752 for (tsp = afs_cbrSpace; tsp; tsp = nsp ) {
2754 afs_osi_Free((char *)tsp, AFS_NCBRS * sizeof(struct afs_cbr));
2758 #if !defined(AFS_OSF_ENV)
2759 freeVCList = Initial_freeVCList = 0;
2761 RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
2762 LOCK_INIT(&afs_xvcb, "afs_xvcb");