2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
19 * afs_FlushActiveVcaches
38 #include <afsconfig.h>
39 #include "../afs/param.h"
43 #include "../afs/sysincludes.h" /*Standard vendor system headers*/
44 #include "../afs/afsincludes.h" /*AFS-based standard headers*/
45 #include "../afs/afs_stats.h"
46 #include "../afs/afs_cbqueue.h"
47 #include "../afs/afs_osidnlc.h"
50 afs_int32 afs_maxvcount = 0; /* max number of vcache entries */
51 afs_int32 afs_vcount = 0; /* number of vcache in use now */
52 #if defined(AFS_OSF30_ENV)
53 extern int max_vnodes; /* number of total system vnodes */
55 extern int nvnode; /* number of total system vnodes */
58 extern int numvnodes; /* number vnodes in use now */
60 #endif /* AFS_OSF_ENV */
65 /* Imported variables */
66 extern struct server *afs_servers[NSERVERS];
67 extern afs_rwlock_t afs_xserver;
68 extern afs_rwlock_t afs_xcbhash;
69 extern struct vcache *afs_globalVp;
71 extern struct mount *afs_globalVFS;
72 extern struct vnodeops Afs_vnodeops;
73 #elif defined(AFS_DARWIN_ENV)
74 extern struct mount *afs_globalVFS;
76 extern struct vfs *afs_globalVFS;
77 #endif /* AFS_OSF_ENV */
78 #if defined(AFS_DUX40_ENV)
79 extern struct vfs_ubcops afs_ubcops;
82 extern struct vnodeops Afs_vnodeops;
86 #endif /* AFS_SGI64_ENV */
88 /* Exported variables */
89 afs_rwlock_t afs_xvcache; /*Lock: alloc new stat cache entries*/
90 afs_lock_t afs_xvcb; /*Lock: fids on which there are callbacks*/
91 struct vcache *freeVCList; /*Free list for stat cache entries*/
92 struct vcache *Initial_freeVCList; /*Initial list for above*/
93 struct afs_q VLRU; /*vcache LRU*/
94 afs_int32 vcachegen = 0;
95 unsigned int afs_paniconwarn = 0;
96 struct vcache *afs_vhashT[VCSIZE];
97 afs_int32 afs_bulkStatsLost;
98 int afs_norefpanic = 0;
100 /* Forward declarations */
101 static afs_int32 afs_QueueVCB(struct vcache *avc);
108 * Flush the given vcache entry.
111 * avc : Pointer to vcache entry to flush.
112 * slept : Pointer to int to set 1 if we sleep/drop locks, 0 if we don't.
115 * afs_xvcache lock must be held for writing upon entry to
116 * prevent people from changing the vrefCount field, and to
117 * protect the lruq and hnext fields.
118 * LOCK: afs_FlushVCache afs_xvcache W
119 * REFCNT: vcache ref count must be zero on entry except for osf1
120 * RACE: lock is dropped and reobtained, permitting race in caller
123 int afs_FlushVCache(struct vcache *avc, int *slept)
124 { /*afs_FlushVCache*/
126 register afs_int32 i, code;
127 register struct vcache **uvc, *wvc, *tvc;
130 AFS_STATCNT(afs_FlushVCache);
131 afs_Trace2(afs_iclSetp, CM_TRACE_FLUSHV, ICL_TYPE_POINTER, avc,
132 ICL_TYPE_INT32, avc->states);
135 VN_LOCK((struct vnode *)avc);
139 code = osi_VM_FlushVCache(avc, slept);
143 if (avc->states & CVFlushed) {
147 if (avc->nextfree || !avc->vlruq.prev || !avc->vlruq.next) { /* qv afs.h */
148 refpanic ("LRU vs. Free inconsistency");
150 avc->states |= CVFlushed;
151 /* pull the entry out of the lruq and put it on the free list */
152 QRemove(&avc->vlruq);
153 avc->vlruq.prev = avc->vlruq.next = (struct afs_q *) 0;
155 /* keep track of # of files that we bulk stat'd, but never used
156 * before they got recycled.
158 if (avc->states & CBulkStat)
161 /* remove entry from the hash chain */
162 i = VCHash(&avc->fid);
163 uvc = &afs_vhashT[i];
164 for(wvc = *uvc; wvc; uvc = &wvc->hnext, wvc = *uvc) {
167 avc->hnext = (struct vcache *) NULL;
171 if (!wvc) osi_Panic("flushvcache"); /* not in correct hash bucket */
172 if (avc->mvid) osi_FreeSmallSpace(avc->mvid);
173 avc->mvid = (struct VenusFid*)0;
175 afs_osi_Free(avc->linkData, strlen(avc->linkData)+1);
176 avc->linkData = NULL;
178 afs_FreeAllAxs(&(avc->Access));
180 /* we can't really give back callbacks on RO files, since the
181 * server only tracks them on a per-volume basis, and we don't
182 * know whether we still have some other files from the same
184 if ((avc->states & CRO) == 0 && avc->callback) {
187 ObtainWriteLock(&afs_xcbhash, 460);
188 afs_DequeueCallback(avc); /* remove it from queued callbacks list */
189 avc->states &= ~(CStatd | CUnique);
190 ReleaseWriteLock(&afs_xcbhash);
191 afs_symhint_inval(avc);
192 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
193 osi_dnlc_purgedp (avc); /* if it (could be) a directory */
195 osi_dnlc_purgevp (avc);
198 * Next, keep track of which vnodes we've deleted for create's
199 * optimistic synchronization algorithm
202 if (avc->fid.Fid.Vnode & 1) afs_oddZaps++;
205 #if !defined(AFS_OSF_ENV)
206 /* put the entry in the free list */
207 avc->nextfree = freeVCList;
209 if (avc->vlruq.prev || avc->vlruq.next) {
210 refpanic ("LRU vs. Free inconsistency");
213 /* This should put it back on the vnode free list since usecount is 1 */
216 if (VREFCOUNT(avc) > 0) {
217 VN_UNLOCK((struct vnode *)avc);
218 AFS_RELE((struct vnode *)avc);
220 if (afs_norefpanic) {
221 printf ("flush vc refcnt < 1");
223 (void) vgone(avc, VX_NOSLEEP, (struct vnodeops *) 0);
225 VN_UNLOCK((struct vnode *)avc);
227 else osi_Panic ("flush vc refcnt < 1");
229 #endif /* AFS_OSF_ENV */
230 avc->states |= CVFlushed;
235 VN_UNLOCK((struct vnode *)avc);
239 } /*afs_FlushVCache*/
245 * The core of the inactive vnode op for all but IRIX.
247 void afs_InactiveVCache(struct vcache *avc, struct AFS_UCRED *acred)
249 extern afs_rwlock_t afs_xdcache, afs_xvcache;
251 AFS_STATCNT(afs_inactive);
252 if (avc->states & CDirty) {
253 /* we can't keep trying to push back dirty data forever. Give up. */
254 afs_InvalidateAllSegments(avc); /* 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 * The proper value for mvstat (for root fids) is setup by the caller.
889 if (afid->Fid.Vnode == 1 && afid->Fid.Unique == 1)
891 if (afs_globalVFS == 0) osi_Panic("afs globalvfs");
892 vSetVfsp(tvc, afs_globalVFS);
895 tvc->v.v_vfsnext = afs_globalVFS->vfs_vnodes; /* link off vfs */
896 tvc->v.v_vfsprev = NULL;
897 afs_globalVFS->vfs_vnodes = &tvc->v;
898 if (tvc->v.v_vfsnext != NULL)
899 tvc->v.v_vfsnext->v_vfsprev = &tvc->v;
900 tvc->v.v_next = gnodepnt->gn_vnode; /*Single vnode per gnode for us!*/
901 gnodepnt->gn_vnode = &tvc->v;
904 tvc->v.g_dev = ((struct mount *)afs_globalVFS->vfs_data)->m_dev;
906 #if defined(AFS_DUX40_ENV)
907 insmntque(tvc, afs_globalVFS, &afs_ubcops);
910 /* Is this needed??? */
911 insmntque(tvc, afs_globalVFS);
912 #endif /* AFS_OSF_ENV */
913 #endif /* AFS_DUX40_ENV */
914 #if defined(AFS_SGI_ENV)
915 VN_SET_DPAGES(&(tvc->v), (struct pfdat*)NULL);
916 osi_Assert((tvc->v.v_flag & VINACT) == 0);
918 osi_Assert(VN_GET_PGCNT(&(tvc->v)) == 0);
919 osi_Assert(tvc->mapcnt == 0 && tvc->vc_locktrips == 0);
920 osi_Assert(tvc->vc_rwlockid == OSI_NO_LOCKID);
921 osi_Assert(tvc->v.v_filocks == NULL);
922 #if !defined(AFS_SGI65_ENV)
923 osi_Assert(tvc->v.v_filocksem == NULL);
925 osi_Assert(tvc->cred == NULL);
927 vnode_pcache_reinit(&tvc->v);
928 tvc->v.v_rdev = NODEV;
930 vn_initlist((struct vnlist *)&tvc->v);
932 #endif /* AFS_SGI_ENV */
933 #if defined(AFS_LINUX22_ENV)
935 struct inode *ip = (struct inode*)tvc;
936 sema_init(&ip->i_sem, 1);
937 #if defined(AFS_LINUX24_ENV)
938 sema_init(&ip->i_zombie, 1);
939 init_waitqueue_head(&ip->i_wait);
940 spin_lock_init(&ip->i_data.i_shared_lock);
941 #ifdef STRUCT_ADDRESS_SPACE_HAS_PAGE_LOCK
942 spin_lock_init(&ip->i_data.page_lock);
944 INIT_LIST_HEAD(&ip->i_data.clean_pages);
945 INIT_LIST_HEAD(&ip->i_data.dirty_pages);
946 INIT_LIST_HEAD(&ip->i_data.locked_pages);
947 INIT_LIST_HEAD(&ip->i_dirty_buffers);
948 #ifdef STRUCT_INODE_HAS_I_DIRTY_DATA_BUFFERS
949 INIT_LIST_HEAD(&ip->i_dirty_data_buffers);
951 #ifdef STRUCT_INODE_HAS_I_DEVICES
952 INIT_LIST_HEAD(&ip->i_devices);
954 ip->i_data.host = (void*) ip;
955 ip->i_mapping = &ip->i_data;
956 #ifdef STRUCT_INODE_HAS_I_TRUNCATE_SEM
957 init_rwsem(&ip->i_truncate_sem);
960 sema_init(&ip->i_atomic_write, 1);
961 init_waitqueue(&ip->i_wait);
963 INIT_LIST_HEAD(&ip->i_hash);
964 INIT_LIST_HEAD(&ip->i_dentry);
966 ip->i_dev = afs_globalVFS->s_dev;
967 ip->i_sb = afs_globalVFS;
972 osi_dnlc_purgedp(tvc); /* this may be overkill */
973 memset((char *)&(tvc->quick), 0, sizeof(struct vtodc));
974 memset((char *)&(tvc->callsort), 0, sizeof(struct afs_q));
975 tvc->slocks = (struct SimpleLocks *)0;
978 tvc->hnext = afs_vhashT[i];
980 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
981 refpanic ("NewVCache VLRU inconsistent");
983 QAdd(&VLRU, &tvc->vlruq); /* put in lruq */
984 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
985 refpanic ("NewVCache VLRU inconsistent2");
987 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
988 refpanic ("NewVCache VLRU inconsistent3");
990 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
991 refpanic ("NewVCache VLRU inconsistent4");
1001 * afs_FlushActiveVcaches
1007 * doflocks : Do we handle flocks?
1009 /* LOCK: afs_FlushActiveVcaches afs_xvcache N */
1011 afs_FlushActiveVcaches(doflocks)
1012 register afs_int32 doflocks;
1014 { /*afs_FlushActiveVcaches*/
1016 register struct vcache *tvc;
1018 register struct conn *tc;
1019 register afs_int32 code;
1020 register struct AFS_UCRED *cred;
1021 struct vrequest treq, ureq;
1022 struct AFSVolSync tsync;
1026 AFS_STATCNT(afs_FlushActiveVcaches);
1027 ObtainReadLock(&afs_xvcache);
1028 for(i=0;i<VCSIZE;i++) {
1029 for(tvc = afs_vhashT[i]; tvc; tvc=tvc->hnext) {
1030 if (doflocks && tvc->flockCount != 0) {
1031 /* if this entry has an flock, send a keep-alive call out */
1033 ReleaseReadLock(&afs_xvcache);
1034 ObtainWriteLock(&tvc->lock,51);
1036 afs_InitReq(&treq, &afs_osi_cred);
1037 treq.flags |= O_NONBLOCK;
1039 tc = afs_Conn(&tvc->fid, &treq, SHARED_LOCK);
1041 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_EXTENDLOCK);
1042 #ifdef RX_ENABLE_LOCKS
1044 #endif /* RX_ENABLE_LOCKS */
1046 RXAFS_ExtendLock(tc->id,
1047 (struct AFSFid *) &tvc->fid.Fid,
1049 #ifdef RX_ENABLE_LOCKS
1051 #endif /* RX_ENABLE_LOCKS */
1056 (afs_Analyze(tc, code, &tvc->fid, &treq,
1057 AFS_STATS_FS_RPCIDX_EXTENDLOCK,
1058 SHARED_LOCK, (struct cell *)0));
1060 ReleaseWriteLock(&tvc->lock);
1061 ObtainReadLock(&afs_xvcache);
1065 if ((tvc->states & CCore) || (tvc->states & CUnlinkedDel)) {
1067 * Don't let it evaporate in case someone else is in
1068 * this code. Also, drop the afs_xvcache lock while
1069 * getting vcache locks.
1072 ReleaseReadLock(&afs_xvcache);
1073 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1074 afs_BozonLock(&tvc->pvnLock, tvc);
1076 #if defined(AFS_SGI_ENV)
1078 * That's because if we come in via the CUnlinkedDel bit state path we'll be have 0 refcnt
1080 osi_Assert(VREFCOUNT(tvc) > 0);
1081 AFS_RWLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1083 ObtainWriteLock(&tvc->lock,52);
1084 if (tvc->states & CCore) {
1085 tvc->states &= ~CCore;
1086 /* XXXX Find better place-holder for cred XXXX */
1087 cred = (struct AFS_UCRED *) tvc->linkData;
1088 tvc->linkData = (char *) 0; /* XXX */
1089 afs_InitReq(&ureq, cred);
1090 afs_Trace2(afs_iclSetp, CM_TRACE_ACTCCORE,
1091 ICL_TYPE_POINTER, tvc,
1092 ICL_TYPE_INT32, tvc->execsOrWriters);
1093 code = afs_StoreOnLastReference(tvc, &ureq);
1094 ReleaseWriteLock(&tvc->lock);
1095 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1096 afs_BozonUnlock(&tvc->pvnLock, tvc);
1098 hzero(tvc->flushDV);
1101 if (code && code != VNOVNODE) {
1102 afs_StoreWarn(code, tvc->fid.Fid.Volume,
1103 /* /dev/console */ 1);
1105 } else if (tvc->states & CUnlinkedDel) {
1109 ReleaseWriteLock(&tvc->lock);
1110 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1111 afs_BozonUnlock(&tvc->pvnLock, tvc);
1113 #if defined(AFS_SGI_ENV)
1114 AFS_RWUNLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1116 afs_remunlink(tvc, 0);
1117 #if defined(AFS_SGI_ENV)
1118 AFS_RWLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1122 /* lost (or won, perhaps) the race condition */
1123 ReleaseWriteLock(&tvc->lock);
1124 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1125 afs_BozonUnlock(&tvc->pvnLock, tvc);
1128 #if defined(AFS_SGI_ENV)
1129 AFS_RWUNLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1131 ObtainReadLock(&afs_xvcache);
1137 AFS_RELE((struct vnode *)tvc);
1139 /* Matches write code setting CCore flag */
1143 #ifdef AFS_DARWIN_ENV
1144 if (VREFCOUNT(tvc) == 1 && UBCINFOEXISTS(&tvc->v)) {
1145 if (tvc->opens) panic("flushactive open, hasubc, but refcnt 1");
1146 osi_VM_TryReclaim(tvc,0);
1151 ReleaseReadLock(&afs_xvcache);
1153 } /*afs_FlushActiveVcaches*/
1160 * Make sure a cache entry is up-to-date status-wise.
1162 * NOTE: everywhere that calls this can potentially be sped up
1163 * by checking CStatd first, and avoiding doing the InitReq
1164 * if this is up-to-date.
1166 * Anymore, the only places that call this KNOW already that the
1167 * vcache is not up-to-date, so we don't screw around.
1170 * avc : Ptr to vcache entry to verify.
1174 int afs_VerifyVCache2(struct vcache *avc, struct vrequest *areq)
1176 register struct vcache *tvc;
1178 AFS_STATCNT(afs_VerifyVCache);
1180 #if defined(AFS_OSF_ENV)
1181 ObtainReadLock(&avc->lock);
1182 if (afs_IsWired(avc)) {
1183 ReleaseReadLock(&avc->lock);
1186 ReleaseReadLock(&avc->lock);
1187 #endif /* AFS_OSF_ENV */
1188 /* otherwise we must fetch the status info */
1190 ObtainWriteLock(&avc->lock,53);
1191 if (avc->states & CStatd) {
1192 ReleaseWriteLock(&avc->lock);
1195 ObtainWriteLock(&afs_xcbhash, 461);
1196 avc->states &= ~( CStatd | CUnique );
1197 avc->callback = (struct server *)0;
1198 afs_DequeueCallback(avc);
1199 ReleaseWriteLock(&afs_xcbhash);
1200 ReleaseWriteLock(&avc->lock);
1202 /* since we've been called back, or the callback has expired,
1203 * it's possible that the contents of this directory, or this
1204 * file's name have changed, thus invalidating the dnlc contents.
1206 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
1207 osi_dnlc_purgedp (avc);
1209 osi_dnlc_purgevp (avc);
1211 /* fetch the status info */
1212 tvc = afs_GetVCache(&avc->fid, areq, (afs_int32*)0, avc, READ_LOCK);
1213 if (!tvc) return ENOENT;
1214 /* Put it back; caller has already incremented vrefCount */
1215 afs_PutVCache(tvc, READ_LOCK);
1218 } /*afs_VerifyVCache*/
1225 * Simple copy of stat info into cache.
1228 * avc : Ptr to vcache entry involved.
1229 * astat : Ptr to stat info to copy.
1232 * Nothing interesting.
1234 * Callers: as of 1992-04-29, only called by WriteVCache
1237 afs_SimpleVStat(avc, astat, areq)
1238 register struct vcache *avc;
1239 register struct AFSFetchStatus *astat;
1240 struct vrequest *areq;
1241 { /*afs_SimpleVStat*/
1244 AFS_STATCNT(afs_SimpleVStat);
1247 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1248 && !AFS_VN_MAPPED((vnode_t*)avc))
1250 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc))
1254 #ifdef AFS_64BIT_ClIENT
1255 FillInt64(length, astat->Length_hi, astat->Length);
1256 #else /* AFS_64BIT_CLIENT */
1257 length = astat->Length;
1258 #endif /* AFS_64BIT_CLIENT */
1259 #if defined(AFS_SGI_ENV)
1260 osi_Assert((valusema(&avc->vc_rwlock) <= 0) &&
1261 (OSI_GET_LOCKID() == avc->vc_rwlockid));
1262 if (length < avc->m.Length) {
1263 vnode_t *vp = (vnode_t *)avc;
1265 osi_Assert(WriteLocked(&avc->lock));
1266 ReleaseWriteLock(&avc->lock);
1268 PTOSSVP(vp, (off_t)length, (off_t)MAXLONG);
1270 ObtainWriteLock(&avc->lock,67);
1273 /* if writing the file, don't fetch over this value */
1274 afs_Trace3(afs_iclSetp, CM_TRACE_SIMPLEVSTAT,
1275 ICL_TYPE_POINTER, avc,
1276 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length),
1277 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1278 avc->m.Length = length;
1279 avc->m.Date = astat->ClientModTime;
1281 avc->m.Owner = astat->Owner;
1282 avc->m.Group = astat->Group;
1283 avc->m.Mode = astat->UnixModeBits;
1284 if (vType(avc) == VREG) {
1285 avc->m.Mode |= S_IFREG;
1287 else if (vType(avc) == VDIR) {
1288 avc->m.Mode |= S_IFDIR;
1290 else if (vType(avc) == VLNK) {
1294 avc->m.Mode |= S_IFLNK;
1295 if ((avc->m.Mode & 0111) == 0) avc->mvstat = 1;
1297 if (avc->states & CForeign) {
1298 struct axscache *ac;
1299 avc->anyAccess = astat->AnonymousAccess;
1301 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1303 * Caller has at least one bit not covered by anonymous, and
1304 * thus may have interesting rights.
1306 * HOWEVER, this is a really bad idea, because any access query
1307 * for bits which aren't covered by anonymous, on behalf of a user
1308 * who doesn't have any special rights, will result in an answer of
1309 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1310 * It's an especially bad idea under Ultrix, since (due to the lack of
1311 * a proper access() call) it must perform several afs_access() calls
1312 * in order to create magic mode bits that vary according to who makes
1313 * the call. In other words, _every_ stat() generates a test for
1316 #endif /* badidea */
1317 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1318 ac->axess = astat->CallerAccess;
1319 else /* not found, add a new one if possible */
1320 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1324 } /*afs_SimpleVStat*/
1331 * Store the status info *only* back to the server for a
1335 * avc : Ptr to the vcache entry.
1336 * astatus : Ptr to the status info to store.
1337 * areq : Ptr to the associated vrequest.
1340 * Must be called with a shared lock held on the vnode.
1343 afs_WriteVCache(avc, astatus, areq)
1344 register struct vcache *avc;
1345 register struct AFSStoreStatus *astatus;
1346 struct vrequest *areq;
1348 { /*afs_WriteVCache*/
1351 struct AFSFetchStatus OutStatus;
1352 struct AFSVolSync tsync;
1355 AFS_STATCNT(afs_WriteVCache);
1356 afs_Trace2(afs_iclSetp, CM_TRACE_WVCACHE, ICL_TYPE_POINTER, avc,
1357 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
1360 tc = afs_Conn(&avc->fid, areq, SHARED_LOCK);
1362 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STORESTATUS);
1363 #ifdef RX_ENABLE_LOCKS
1365 #endif /* RX_ENABLE_LOCKS */
1366 code = RXAFS_StoreStatus(tc->id,
1367 (struct AFSFid *) &avc->fid.Fid,
1368 astatus, &OutStatus, &tsync);
1369 #ifdef RX_ENABLE_LOCKS
1371 #endif /* RX_ENABLE_LOCKS */
1376 (afs_Analyze(tc, code, &avc->fid, areq,
1377 AFS_STATS_FS_RPCIDX_STORESTATUS,
1378 SHARED_LOCK, (struct cell *)0));
1380 UpgradeSToWLock(&avc->lock,20);
1382 /* success, do the changes locally */
1383 afs_SimpleVStat(avc, &OutStatus, areq);
1385 * Update the date, too. SimpleVStat didn't do this, since
1386 * it thought we were doing this after fetching new status
1387 * over a file being written.
1389 avc->m.Date = OutStatus.ClientModTime;
1392 /* failure, set up to check with server next time */
1393 ObtainWriteLock(&afs_xcbhash, 462);
1394 afs_DequeueCallback(avc);
1395 avc->states &= ~( CStatd | CUnique); /* turn off stat valid flag */
1396 ReleaseWriteLock(&afs_xcbhash);
1397 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
1398 osi_dnlc_purgedp (avc); /* if it (could be) a directory */
1400 ConvertWToSLock(&avc->lock);
1403 } /*afs_WriteVCache*/
1409 * Copy astat block into vcache info
1412 * avc : Ptr to vcache entry.
1413 * astat : Ptr to stat block to copy in.
1414 * areq : Ptr to associated request.
1417 * Must be called under a write lock
1419 * Note: this code may get dataversion and length out of sync if the file has
1420 * been modified. This is less than ideal. I haven't thought about
1421 * it sufficiently to be certain that it is adequate.
1424 afs_ProcessFS(avc, astat, areq)
1425 register struct vcache *avc;
1426 struct vrequest *areq;
1427 register struct AFSFetchStatus *astat;
1433 AFS_STATCNT(afs_ProcessFS);
1435 #ifdef AFS_64BIT_CLIENT
1436 FillInt64(length, astat->Length_hi, astat->Length);
1437 #else /* AFS_64BIT_CLIENT */
1438 length = astat->Length;
1439 #endif /* AFS_64BIT_CLIENT */
1440 /* WARNING: afs_DoBulkStat uses the Length field to store a sequence
1441 * number for each bulk status request. Under no circumstances
1442 * should afs_DoBulkStat store a sequence number if the new
1443 * length will be ignored when afs_ProcessFS is called with
1444 * new stats. If you change the following conditional then you
1445 * also need to change the conditional in afs_DoBulkStat. */
1447 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1448 && !AFS_VN_MAPPED((vnode_t*)avc))
1450 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc))
1453 /* if we're writing or mapping this file, don't fetch over these
1456 afs_Trace3(afs_iclSetp, CM_TRACE_PROCESSFS, ICL_TYPE_POINTER, avc,
1457 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length),
1458 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1459 avc->m.Length = length;
1460 avc->m.Date = astat->ClientModTime;
1462 hset64(avc->m.DataVersion, astat->dataVersionHigh, astat->DataVersion);
1463 avc->m.Owner = astat->Owner;
1464 avc->m.Mode = astat->UnixModeBits;
1465 avc->m.Group = astat->Group;
1466 avc->m.LinkCount = astat->LinkCount;
1467 if (astat->FileType == File) {
1468 vSetType(avc, VREG);
1469 avc->m.Mode |= S_IFREG;
1471 else if (astat->FileType == Directory) {
1472 vSetType(avc, VDIR);
1473 avc->m.Mode |= S_IFDIR;
1475 else if (astat->FileType == SymbolicLink) {
1476 vSetType(avc, VLNK);
1477 avc->m.Mode |= S_IFLNK;
1478 if ((avc->m.Mode & 0111) == 0) avc->mvstat = 1;
1480 avc->anyAccess = astat->AnonymousAccess;
1482 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1484 * Caller has at least one bit not covered by anonymous, and
1485 * thus may have interesting rights.
1487 * HOWEVER, this is a really bad idea, because any access query
1488 * for bits which aren't covered by anonymous, on behalf of a user
1489 * who doesn't have any special rights, will result in an answer of
1490 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1491 * It's an especially bad idea under Ultrix, since (due to the lack of
1492 * a proper access() call) it must perform several afs_access() calls
1493 * in order to create magic mode bits that vary according to who makes
1494 * the call. In other words, _every_ stat() generates a test for
1497 #endif /* badidea */
1499 struct axscache *ac;
1500 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1501 ac->axess = astat->CallerAccess;
1502 else /* not found, add a new one if possible */
1503 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1506 #ifdef AFS_LINUX22_ENV
1507 vcache2inode(avc); /* Set the inode attr cache */
1513 afs_RemoteLookup(afid, areq, name, nfid, OutStatusp, CallBackp, serverp, tsyncp)
1514 register struct VenusFid *afid;
1515 struct vrequest *areq;
1517 struct VenusFid *nfid;
1518 struct AFSFetchStatus *OutStatusp;
1519 struct AFSCallBack *CallBackp;
1520 struct server **serverp;
1521 struct AFSVolSync *tsyncp;
1524 register struct vcache *tvc;
1527 register struct conn *tc;
1528 struct AFSFetchStatus OutDirStatus;
1531 if (!name) name = ""; /* XXX */
1533 tc = afs_Conn(afid, areq, SHARED_LOCK);
1535 if (serverp) *serverp = tc->srvr->server;
1537 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_XLOOKUP);
1538 #ifdef RX_ENABLE_LOCKS
1540 #endif /* RX_ENABLE_LOCKS */
1541 code = RXAFS_Lookup(tc->id, (struct AFSFid *) &afid->Fid, name,
1542 (struct AFSFid *) &nfid->Fid,
1543 OutStatusp, &OutDirStatus, CallBackp, tsyncp);
1544 #ifdef RX_ENABLE_LOCKS
1546 #endif /* RX_ENABLE_LOCKS */
1551 (afs_Analyze(tc, code, afid, areq,
1552 AFS_STATS_FS_RPCIDX_XLOOKUP,
1553 SHARED_LOCK, (struct cell *)0));
1563 * Given a file id and a vrequest structure, fetch the status
1564 * information associated with the file.
1568 * areq : Ptr to associated vrequest structure, specifying the
1569 * user whose authentication tokens will be used.
1570 * avc : caller may already have a vcache for this file, which is
1574 * The cache entry is returned with an increased vrefCount field.
1575 * The entry must be discarded by calling afs_PutVCache when you
1576 * are through using the pointer to the cache entry.
1578 * You should not hold any locks when calling this function, except
1579 * locks on other vcache entries. If you lock more than one vcache
1580 * entry simultaneously, you should lock them in this order:
1582 * 1. Lock all files first, then directories.
1583 * 2. Within a particular type, lock entries in Fid.Vnode order.
1585 * This locking hierarchy is convenient because it allows locking
1586 * of a parent dir cache entry, given a file (to check its access
1587 * control list). It also allows renames to be handled easily by
1588 * locking directories in a constant order.
1589 * NB. NewVCache -> FlushVCache presently (4/10/95) drops the xvcache lock.
1591 struct vcache *afs_GetVCache(afid, areq, cached, avc, locktype)
1592 register struct VenusFid *afid;
1593 struct vrequest *areq;
1596 struct vcache *avc; /* might have a vcache structure already, which must
1597 * already be held by the caller */
1600 afs_int32 code, i, newvcache=0;
1601 register struct vcache *tvc;
1605 AFS_STATCNT(afs_GetVCache);
1607 if (cached) *cached = 0; /* Init just in case */
1610 ObtainSharedLock(&afs_xvcache,5);
1612 tvc = afs_FindVCache(afid, 0, 0, &retry, DO_STATS | DO_VLRU );
1614 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1615 ReleaseSharedLock(&afs_xvcache);
1616 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1624 if (tvc->states & CStatd) {
1625 ReleaseSharedLock(&afs_xvcache);
1630 UpgradeSToWLock(&afs_xvcache,21);
1632 /* no cache entry, better grab one */
1633 tvc = afs_NewVCache(afid, (struct server *)0, 1, WRITE_LOCK);
1636 ConvertWToSLock(&afs_xvcache);
1637 afs_stats_cmperf.vcacheMisses++;
1640 ReleaseSharedLock(&afs_xvcache);
1642 ObtainWriteLock(&tvc->lock,54);
1644 if (tvc->states & CStatd) {
1645 #ifdef AFS_LINUX22_ENV
1648 ReleaseWriteLock(&tvc->lock);
1649 #ifdef AFS_DARWIN_ENV
1655 #if defined(AFS_OSF_ENV)
1656 if (afs_IsWired(tvc)) {
1657 ReleaseWriteLock(&tvc->lock);
1660 #endif /* AFS_OSF_ENV */
1662 ObtainWriteLock(&afs_xcbhash, 464);
1663 tvc->states &= ~CUnique;
1665 afs_DequeueCallback(tvc);
1666 ReleaseWriteLock(&afs_xcbhash);
1668 /* It is always appropriate to throw away all the access rights? */
1669 afs_FreeAllAxs(&(tvc->Access));
1670 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-volume info */
1672 if ((tvp->states & VForeign)) {
1673 if (newvcache) tvc->states |= CForeign;
1674 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
1675 && (tvp->rootUnique == afid->Fid.Unique)) {
1679 if (tvp->states & VRO) tvc->states |= CRO;
1680 if (tvp->states & VBackup) tvc->states |= CBackup;
1681 /* now copy ".." entry back out of volume structure, if necessary */
1682 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
1684 tvc->mvid = (struct VenusFid *)
1685 osi_AllocSmallSpace(sizeof(struct VenusFid));
1686 *tvc->mvid = tvp->dotdot;
1688 afs_PutVolume(tvp, READ_LOCK);
1692 afs_RemoveVCB(afid);
1694 struct AFSFetchStatus OutStatus;
1696 if (afs_DynrootNewVnode(tvc, &OutStatus)) {
1697 afs_ProcessFS(tvc, &OutStatus, areq);
1698 tvc->states |= CStatd | CUnique;
1701 code = afs_FetchStatus(tvc, afid, areq, &OutStatus);
1706 ReleaseWriteLock(&tvc->lock);
1708 ObtainReadLock(&afs_xvcache);
1710 ReleaseReadLock(&afs_xvcache);
1711 return (struct vcache *) 0;
1714 ReleaseWriteLock(&tvc->lock);
1715 #ifdef AFS_DARWIN_ENV
1724 struct vcache *afs_LookupVCache(struct VenusFid *afid, struct vrequest *areq,
1725 afs_int32 *cached, afs_int32 locktype,
1726 struct vcache *adp, char *aname)
1728 afs_int32 code, now, newvcache=0, hash;
1729 struct VenusFid nfid;
1730 register struct vcache *tvc;
1732 struct AFSFetchStatus OutStatus;
1733 struct AFSCallBack CallBack;
1734 struct AFSVolSync tsync;
1735 struct server *serverp = 0;
1739 AFS_STATCNT(afs_GetVCache);
1740 if (cached) *cached = 0; /* Init just in case */
1743 ObtainReadLock(&afs_xvcache);
1744 tvc = afs_FindVCache(afid, 0, 0, &retry, DO_STATS /* no vlru */);
1747 ReleaseReadLock(&afs_xvcache);
1749 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1750 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1754 ObtainReadLock(&tvc->lock);
1756 if (tvc->states & CStatd) {
1760 ReleaseReadLock(&tvc->lock);
1763 tvc->states &= ~CUnique;
1765 ReleaseReadLock(&tvc->lock);
1766 ObtainReadLock(&afs_xvcache);
1770 ReleaseReadLock(&afs_xvcache);
1772 /* lookup the file */
1775 origCBs = afs_allCBs; /* if anything changes, we don't have a cb */
1776 code = afs_RemoteLookup(&adp->fid, areq, aname, &nfid, &OutStatus, &CallBack,
1780 ObtainSharedLock(&afs_xvcache,6);
1781 tvc = afs_FindVCache(&nfid, 0, 0, &retry, DO_VLRU /* no xstats now*/);
1783 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1784 ReleaseSharedLock(&afs_xvcache);
1785 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1791 /* no cache entry, better grab one */
1792 UpgradeSToWLock(&afs_xvcache,22);
1793 tvc = afs_NewVCache(&nfid, (struct server *)0, 1, WRITE_LOCK);
1795 ConvertWToSLock(&afs_xvcache);
1798 ReleaseSharedLock(&afs_xvcache);
1799 ObtainWriteLock(&tvc->lock,55);
1801 /* It is always appropriate to throw away all the access rights? */
1802 afs_FreeAllAxs(&(tvc->Access));
1803 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-vol info */
1805 if ((tvp->states & VForeign)) {
1806 if (newvcache) tvc->states |= CForeign;
1807 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
1808 && (tvp->rootUnique == afid->Fid.Unique))
1811 if (tvp->states & VRO) tvc->states |= CRO;
1812 if (tvp->states & VBackup) tvc->states |= CBackup;
1813 /* now copy ".." entry back out of volume structure, if necessary */
1814 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
1816 tvc->mvid = (struct VenusFid *)
1817 osi_AllocSmallSpace(sizeof(struct VenusFid));
1818 *tvc->mvid = tvp->dotdot;
1823 ObtainWriteLock(&afs_xcbhash, 465);
1824 afs_DequeueCallback(tvc);
1825 tvc->states &= ~( CStatd | CUnique );
1826 ReleaseWriteLock(&afs_xcbhash);
1827 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
1828 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
1830 afs_PutVolume(tvp, READ_LOCK);
1831 ReleaseWriteLock(&tvc->lock);
1832 ObtainReadLock(&afs_xvcache);
1834 ReleaseReadLock(&afs_xvcache);
1835 return (struct vcache *) 0;
1838 ObtainWriteLock(&afs_xcbhash, 466);
1839 if (origCBs == afs_allCBs) {
1840 if (CallBack.ExpirationTime) {
1841 tvc->callback = serverp;
1842 tvc->cbExpires = CallBack.ExpirationTime+now;
1843 tvc->states |= CStatd | CUnique;
1844 tvc->states &= ~CBulkFetching;
1845 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvp);
1846 } else if (tvc->states & CRO) {
1847 /* adapt gives us an hour. */
1848 tvc->cbExpires = 3600+osi_Time(); /*XXX*/
1849 tvc->states |= CStatd | CUnique;
1850 tvc->states &= ~CBulkFetching;
1851 afs_QueueCallback(tvc, CBHash(3600), tvp);
1853 tvc->callback = (struct server *)0;
1854 afs_DequeueCallback(tvc);
1855 tvc->states &= ~(CStatd | CUnique);
1856 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
1857 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
1860 afs_DequeueCallback(tvc);
1861 tvc->states &= ~CStatd;
1862 tvc->states &= ~CUnique;
1863 tvc->callback = (struct server *)0;
1864 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
1865 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
1867 ReleaseWriteLock(&afs_xcbhash);
1869 afs_PutVolume(tvp, READ_LOCK);
1870 afs_ProcessFS(tvc, &OutStatus, areq);
1872 ReleaseWriteLock(&tvc->lock);
1873 #ifdef AFS_DARWIN_ENV
1880 struct vcache *afs_GetRootVCache(struct VenusFid *afid,
1881 struct vrequest *areq, afs_int32 *cached,
1882 struct volume *tvolp, afs_int32 locktype)
1884 afs_int32 code, i, newvcache = 0, haveStatus = 0;
1885 afs_int32 getNewFid = 0;
1887 struct VenusFid nfid;
1888 register struct vcache *tvc;
1889 struct server *serverp = 0;
1890 struct AFSFetchStatus OutStatus;
1891 struct AFSCallBack CallBack;
1892 struct AFSVolSync tsync;
1898 if (!tvolp->rootVnode || getNewFid) {
1899 struct VenusFid tfid;
1902 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
1903 origCBs = afs_allCBs; /* ignore InitCallBackState */
1904 code = afs_RemoteLookup(&tfid, areq, (char *)0, &nfid,
1905 &OutStatus, &CallBack, &serverp, &tsync);
1907 return (struct vcache *)0;
1909 /* ReleaseReadLock(&tvolp->lock); */
1910 ObtainWriteLock(&tvolp->lock,56);
1911 tvolp->rootVnode = afid->Fid.Vnode = nfid.Fid.Vnode;
1912 tvolp->rootUnique = afid->Fid.Unique = nfid.Fid.Unique;
1913 ReleaseWriteLock(&tvolp->lock);
1914 /* ObtainReadLock(&tvolp->lock);*/
1917 afid->Fid.Vnode = tvolp->rootVnode;
1918 afid->Fid.Unique = tvolp->rootUnique;
1921 ObtainSharedLock(&afs_xvcache,7);
1923 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
1924 if (!FidCmp(&(tvc->fid), afid)) {
1926 /* Grab this vnode, possibly reactivating from the free list */
1927 /* for the present (95.05.25) everything on the hash table is
1928 * definitively NOT in the free list -- at least until afs_reclaim
1929 * can be safely implemented */
1932 vg = vget((struct vnode *)tvc); /* this bumps ref count */
1936 #endif /* AFS_OSF_ENV */
1941 if (!haveStatus && (!tvc || !(tvc->states & CStatd))) {
1942 /* Mount point no longer stat'd or unknown. FID may have changed. */
1947 tvc = (struct vcache*)0;
1949 ReleaseSharedLock(&afs_xvcache);
1954 UpgradeSToWLock(&afs_xvcache,23);
1955 /* no cache entry, better grab one */
1956 tvc = afs_NewVCache(afid, (struct server *)0, 1, WRITE_LOCK);
1958 afs_stats_cmperf.vcacheMisses++;
1961 if (cached) *cached = 1;
1962 afs_stats_cmperf.vcacheHits++;
1964 /* we already bumped the ref count in the for loop above */
1965 #else /* AFS_OSF_ENV */
1968 UpgradeSToWLock(&afs_xvcache,24);
1969 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
1970 refpanic ("GRVC VLRU inconsistent0");
1972 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
1973 refpanic ("GRVC VLRU inconsistent1");
1975 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
1976 refpanic ("GRVC VLRU inconsistent2");
1978 QRemove(&tvc->vlruq); /* move to lruq head */
1979 QAdd(&VLRU, &tvc->vlruq);
1980 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
1981 refpanic ("GRVC VLRU inconsistent3");
1983 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
1984 refpanic ("GRVC VLRU inconsistent4");
1986 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
1987 refpanic ("GRVC VLRU inconsistent5");
1992 ReleaseWriteLock(&afs_xvcache);
1994 if (tvc->states & CStatd) {
1998 ObtainReadLock(&tvc->lock);
1999 tvc->states &= ~CUnique;
2000 tvc->callback = (struct server *)0; /* redundant, perhaps */
2001 ReleaseReadLock(&tvc->lock);
2004 ObtainWriteLock(&tvc->lock,57);
2006 /* It is always appropriate to throw away all the access rights? */
2007 afs_FreeAllAxs(&(tvc->Access));
2009 if (newvcache) tvc->states |= CForeign;
2010 if (tvolp->states & VRO) tvc->states |= CRO;
2011 if (tvolp->states & VBackup) tvc->states |= CBackup;
2012 /* now copy ".." entry back out of volume structure, if necessary */
2013 if (newvcache && (tvolp->rootVnode == afid->Fid.Vnode)
2014 && (tvolp->rootUnique == afid->Fid.Unique)) {
2017 if (tvc->mvstat == 2 && tvolp->dotdot.Fid.Volume != 0) {
2019 tvc->mvid = (struct VenusFid *)osi_AllocSmallSpace(sizeof(struct VenusFid));
2020 *tvc->mvid = tvolp->dotdot;
2024 afs_RemoveVCB(afid);
2027 struct VenusFid tfid;
2030 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
2031 origCBs = afs_allCBs; /* ignore InitCallBackState */
2032 code = afs_RemoteLookup(&tfid, areq, (char *)0, &nfid, &OutStatus,
2033 &CallBack, &serverp, &tsync);
2037 ObtainWriteLock(&afs_xcbhash, 467);
2038 afs_DequeueCallback(tvc);
2039 tvc->callback = (struct server *)0;
2040 tvc->states &= ~(CStatd|CUnique);
2041 ReleaseWriteLock(&afs_xcbhash);
2042 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2043 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2044 ReleaseWriteLock(&tvc->lock);
2045 ObtainReadLock(&afs_xvcache);
2047 ReleaseReadLock(&afs_xvcache);
2048 return (struct vcache *) 0;
2051 ObtainWriteLock(&afs_xcbhash, 468);
2052 if (origCBs == afs_allCBs) {
2053 tvc->states |= CTruth;
2054 tvc->callback = serverp;
2055 if (CallBack.ExpirationTime != 0) {
2056 tvc->cbExpires = CallBack.ExpirationTime+start;
2057 tvc->states |= CStatd;
2058 tvc->states &= ~CBulkFetching;
2059 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvolp);
2060 } else if (tvc->states & CRO) {
2061 /* adapt gives us an hour. */
2062 tvc->cbExpires = 3600+osi_Time(); /*XXX*/
2063 tvc->states |= CStatd;
2064 tvc->states &= ~CBulkFetching;
2065 afs_QueueCallback(tvc, CBHash(3600), tvolp);
2068 afs_DequeueCallback(tvc);
2069 tvc->callback = (struct server *)0;
2070 tvc->states &= ~(CStatd | CUnique);
2071 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2072 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2074 ReleaseWriteLock(&afs_xcbhash);
2075 afs_ProcessFS(tvc, &OutStatus, areq);
2077 ReleaseWriteLock(&tvc->lock);
2084 * must be called with avc write-locked
2085 * don't absolutely have to invalidate the hint unless the dv has
2086 * changed, but be sure to get it right else there will be consistency bugs.
2088 afs_int32 afs_FetchStatus(struct vcache *avc, struct VenusFid *afid,
2089 struct vrequest *areq, struct AFSFetchStatus *Outsp)
2093 register struct conn *tc;
2094 struct AFSCallBack CallBack;
2095 struct AFSVolSync tsync;
2096 struct volume* volp;
2100 tc = afs_Conn(afid, areq, SHARED_LOCK);
2101 avc->quick.stamp = 0; avc->h1.dchint = NULL; /* invalidate hints */
2103 avc->callback = tc->srvr->server;
2105 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_FETCHSTATUS);
2106 #ifdef RX_ENABLE_LOCKS
2108 #endif /* RX_ENABLE_LOCKS */
2109 code = RXAFS_FetchStatus(tc->id,
2110 (struct AFSFid *) &afid->Fid,
2111 Outsp, &CallBack, &tsync);
2112 #ifdef RX_ENABLE_LOCKS
2114 #endif /* RX_ENABLE_LOCKS */
2121 (afs_Analyze(tc, code, afid, areq,
2122 AFS_STATS_FS_RPCIDX_FETCHSTATUS,
2123 SHARED_LOCK, (struct cell *)0));
2126 afs_ProcessFS(avc, Outsp, areq);
2127 volp = afs_GetVolume(afid, areq, READ_LOCK);
2128 ObtainWriteLock(&afs_xcbhash, 469);
2129 avc->states |= CTruth;
2130 if (avc->callback /* check for race */) {
2131 if (CallBack.ExpirationTime != 0) {
2132 avc->cbExpires = CallBack.ExpirationTime+start;
2133 avc->states |= CStatd;
2134 avc->states &= ~CBulkFetching;
2135 afs_QueueCallback(avc, CBHash(CallBack.ExpirationTime), volp);
2137 else if (avc->states & CRO)
2138 { /* ordinary callback on a read-only volume -- AFS 3.2 style */
2139 avc->cbExpires = 3600+start;
2140 avc->states |= CStatd;
2141 avc->states &= ~CBulkFetching;
2142 afs_QueueCallback(avc, CBHash(3600), volp);
2145 afs_DequeueCallback(avc);
2146 avc->callback = (struct server *)0;
2147 avc->states &= ~(CStatd|CUnique);
2148 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
2149 osi_dnlc_purgedp (avc); /* if it (could be) a directory */
2153 afs_DequeueCallback(avc);
2154 avc->callback = (struct server *)0;
2155 avc->states &= ~(CStatd|CUnique);
2156 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
2157 osi_dnlc_purgedp (avc); /* if it (could be) a directory */
2159 ReleaseWriteLock(&afs_xcbhash);
2161 afs_PutVolume(volp, READ_LOCK);
2163 else { /* used to undo the local callback, but that's too extreme.
2164 * There are plenty of good reasons that fetchstatus might return
2165 * an error, such as EPERM. If we have the vnode cached, statd,
2166 * with callback, might as well keep track of the fact that we
2167 * don't have access...
2169 if (code == EPERM || code == EACCES) {
2170 struct axscache *ac;
2171 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
2173 else /* not found, add a new one if possible */
2174 afs_AddAxs(avc->Access, areq->uid, 0);
2185 * Stuff some information into the vcache for the given file.
2188 * afid : File in question.
2189 * OutStatus : Fetch status on the file.
2190 * CallBack : Callback info.
2191 * tc : RPC connection involved.
2192 * areq : vrequest involved.
2195 * Nothing interesting.
2198 afs_StuffVcache(afid, OutStatus, CallBack, tc, areq)
2199 register struct VenusFid *afid;
2200 struct AFSFetchStatus *OutStatus;
2201 struct AFSCallBack *CallBack;
2202 register struct conn *tc;
2203 struct vrequest *areq;
2205 { /*afs_StuffVcache*/
2207 register afs_int32 code, i, newvcache=0;
2208 register struct vcache *tvc;
2209 struct AFSVolSync tsync;
2211 struct axscache *ac;
2214 AFS_STATCNT(afs_StuffVcache);
2215 #ifdef IFS_VCACHECOUNT
2220 ObtainSharedLock(&afs_xvcache,8);
2222 tvc = afs_FindVCache(afid, 0, 0, &retry, DO_VLRU /* no stats */);
2224 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2225 ReleaseSharedLock(&afs_xvcache);
2226 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2232 /* no cache entry, better grab one */
2233 UpgradeSToWLock(&afs_xvcache,25);
2234 tvc = afs_NewVCache(afid, (struct server *)0, 1, WRITE_LOCK);
2236 ConvertWToSLock(&afs_xvcache);
2239 ReleaseSharedLock(&afs_xvcache);
2240 ObtainWriteLock(&tvc->lock,58);
2242 tvc->states &= ~CStatd;
2243 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2244 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2246 /* Is it always appropriate to throw away all the access rights? */
2247 afs_FreeAllAxs(&(tvc->Access));
2249 /*Copy useful per-volume info*/
2250 tvp = afs_GetVolume(afid, areq, READ_LOCK);
2252 if (newvcache && (tvp->states & VForeign)) tvc->states |= CForeign;
2253 if (tvp->states & VRO) tvc->states |= CRO;
2254 if (tvp->states & VBackup) tvc->states |= CBackup;
2256 * Now, copy ".." entry back out of volume structure, if
2259 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
2260 if (!tvc->mvid) tvc->mvid =
2261 (struct VenusFid *) osi_AllocSmallSpace(sizeof(struct VenusFid));
2262 *tvc->mvid = tvp->dotdot;
2265 /* store the stat on the file */
2266 afs_RemoveVCB(afid);
2267 afs_ProcessFS(tvc, OutStatus, areq);
2268 tvc->callback = tc->srvr->server;
2270 /* we use osi_Time twice below. Ideally, we would use the time at which
2271 * the FetchStatus call began, instead, but we don't have it here. So we
2272 * make do with "now". In the CRO case, it doesn't really matter. In
2273 * the other case, we hope that the difference between "now" and when the
2274 * call actually began execution on the server won't be larger than the
2275 * padding which the server keeps. Subtract 1 second anyway, to be on
2276 * the safe side. Can't subtract more because we don't know how big
2277 * ExpirationTime is. Possible consistency problems may arise if the call
2278 * timeout period becomes longer than the server's expiration padding. */
2279 ObtainWriteLock(&afs_xcbhash, 470);
2280 if (CallBack->ExpirationTime != 0) {
2281 tvc->cbExpires = CallBack->ExpirationTime+osi_Time()-1;
2282 tvc->states |= CStatd;
2283 tvc->states &= ~CBulkFetching;
2284 afs_QueueCallback(tvc, CBHash(CallBack->ExpirationTime), tvp);
2286 else if (tvc->states & CRO) {
2287 /* old-fashioned AFS 3.2 style */
2288 tvc->cbExpires = 3600+osi_Time(); /*XXX*/
2289 tvc->states |= CStatd;
2290 tvc->states &= ~CBulkFetching;
2291 afs_QueueCallback(tvc, CBHash(3600), tvp);
2294 afs_DequeueCallback(tvc);
2295 tvc->callback = (struct server *)0;
2296 tvc->states &= ~(CStatd|CUnique);
2297 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2298 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2300 ReleaseWriteLock(&afs_xcbhash);
2302 afs_PutVolume(tvp, READ_LOCK);
2304 /* look in per-pag cache */
2305 if (tvc->Access && (ac = afs_FindAxs(tvc->Access, areq->uid)))
2306 ac->axess = OutStatus->CallerAccess; /* substitute pags */
2307 else /* not found, add a new one if possible */
2308 afs_AddAxs(tvc->Access, areq->uid, OutStatus->CallerAccess);
2310 ReleaseWriteLock(&tvc->lock);
2311 afs_Trace4(afs_iclSetp, CM_TRACE_STUFFVCACHE, ICL_TYPE_POINTER, tvc,
2312 ICL_TYPE_POINTER, tvc->callback, ICL_TYPE_INT32, tvc->cbExpires,
2313 ICL_TYPE_INT32, tvc->cbExpires-osi_Time());
2315 * Release ref count... hope this guy stays around...
2317 afs_PutVCache(tvc, WRITE_LOCK);
2318 } /*afs_StuffVcache*/
2325 * Decrements the reference count on a cache entry.
2328 * avc : Pointer to the cache entry to decrement.
2331 * Nothing interesting.
2334 afs_PutVCache(avc, locktype)
2335 register struct vcache *avc;
2339 AFS_STATCNT(afs_PutVCache);
2341 * Can we use a read lock here?
2343 ObtainReadLock(&afs_xvcache);
2345 ReleaseReadLock(&afs_xvcache);
2352 * Find a vcache entry given a fid.
2355 * afid : Pointer to the fid whose cache entry we desire.
2356 * retry: (SGI-specific) tell the caller to drop the lock on xvcache,
2357 * unlock the vnode, and try again.
2358 * flags: bit 1 to specify whether to compute hit statistics. Not
2359 * set if FindVCache is called as part of internal bookkeeping.
2362 * Must be called with the afs_xvcache lock at least held at
2363 * the read level. In order to do the VLRU adjustment, the xvcache lock
2364 * must be shared-- we upgrade it here.
2367 struct vcache *afs_FindVCache(struct VenusFid *afid, afs_int32 lockit,
2368 afs_int32 locktype, afs_int32 *retry, afs_int32 flag)
2371 register struct vcache *tvc;
2374 AFS_STATCNT(afs_FindVCache);
2377 for(tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2378 if (FidMatches(afid, tvc)) {
2380 /* Grab this vnode, possibly reactivating from the free list */
2383 vg = vget((struct vnode *)tvc);
2387 #endif /* AFS_OSF_ENV */
2392 /* should I have a read lock on the vnode here? */
2394 if (retry) *retry = 0;
2395 #if !defined(AFS_OSF_ENV)
2396 osi_vnhold(tvc, retry); /* already held, above */
2397 if (retry && *retry)
2401 * only move to front of vlru if we have proper vcache locking)
2403 if (flag & DO_VLRU) {
2404 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2405 refpanic ("FindVC VLRU inconsistent1");
2407 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2408 refpanic ("FindVC VLRU inconsistent1");
2410 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2411 refpanic ("FindVC VLRU inconsistent2");
2413 UpgradeSToWLock(&afs_xvcache,26);
2414 QRemove(&tvc->vlruq);
2415 QAdd(&VLRU, &tvc->vlruq);
2416 ConvertWToSLock(&afs_xvcache);
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 inconsistent2");
2423 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2424 refpanic ("FindVC VLRU inconsistent3");
2430 if (flag & DO_STATS) {
2431 if (tvc) afs_stats_cmperf.vcacheHits++;
2432 else afs_stats_cmperf.vcacheMisses++;
2433 if (afid->Cell == LOCALCELL)
2434 afs_stats_cmperf.vlocalAccesses++;
2436 afs_stats_cmperf.vremoteAccesses++;
2439 #ifdef AFS_LINUX22_ENV
2440 if (tvc && (tvc->states & CStatd))
2441 vcache2inode(tvc); /* mainly to reset i_nlink */
2443 #ifdef AFS_DARWIN_ENV
2448 } /*afs_FindVCache*/
2454 * Find a vcache entry given a fid. Does a wildcard match on what we
2455 * have for the fid. If more than one entry, don't return anything.
2458 * avcp : Fill in pointer if we found one and only one.
2459 * afid : Pointer to the fid whose cache entry we desire.
2460 * retry: (SGI-specific) tell the caller to drop the lock on xvcache,
2461 * unlock the vnode, and try again.
2462 * flags: bit 1 to specify whether to compute hit statistics. Not
2463 * set if FindVCache is called as part of internal bookkeeping.
2466 * Must be called with the afs_xvcache lock at least held at
2467 * the read level. In order to do the VLRU adjustment, the xvcache lock
2468 * must be shared-- we upgrade it here.
2471 * number of matches found.
2474 int afs_duplicate_nfs_fids=0;
2476 afs_int32 afs_NFSFindVCache(avcp, afid, lockit)
2477 struct vcache **avcp;
2478 struct VenusFid *afid;
2480 { /*afs_FindVCache*/
2482 register struct vcache *tvc;
2484 afs_int32 retry = 0;
2485 afs_int32 count = 0;
2486 struct vcache *found_tvc = NULL;
2488 AFS_STATCNT(afs_FindVCache);
2492 ObtainSharedLock(&afs_xvcache,331);
2495 for(tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2496 /* Match only on what we have.... */
2497 if (((tvc->fid.Fid.Vnode & 0xffff) == afid->Fid.Vnode)
2498 && (tvc->fid.Fid.Volume == afid->Fid.Volume)
2499 && ((tvc->fid.Fid.Unique & 0xffffff) == afid->Fid.Unique)
2500 && (tvc->fid.Cell == afid->Cell)) {
2502 /* Grab this vnode, possibly reactivating from the free list */
2505 vg = vget((struct vnode *)tvc);
2508 /* This vnode no longer exists. */
2511 #endif /* AFS_OSF_ENV */
2516 /* Drop our reference counts. */
2517 vrele((struct vnode *)tvc);
2518 vrele((struct vnode *)found_tvc);
2520 afs_duplicate_nfs_fids++;
2521 ReleaseSharedLock(&afs_xvcache);
2529 /* should I have a read lock on the vnode here? */
2531 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2532 osi_vnhold(tvc, &retry);
2535 found_tvc = (struct vcache*)0;
2536 ReleaseSharedLock(&afs_xvcache);
2537 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2541 #if !defined(AFS_OSF_ENV)
2542 osi_vnhold(tvc, (int*)0); /* already held, above */
2546 * We obtained the xvcache lock above.
2548 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2549 refpanic ("FindVC VLRU inconsistent1");
2551 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2552 refpanic ("FindVC VLRU inconsistent1");
2554 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2555 refpanic ("FindVC VLRU inconsistent2");
2557 UpgradeSToWLock(&afs_xvcache,568);
2558 QRemove(&tvc->vlruq);
2559 QAdd(&VLRU, &tvc->vlruq);
2560 ConvertWToSLock(&afs_xvcache);
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 inconsistent2");
2567 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2568 refpanic ("FindVC VLRU inconsistent3");
2573 if (tvc) afs_stats_cmperf.vcacheHits++;
2574 else afs_stats_cmperf.vcacheMisses++;
2575 if (afid->Cell == LOCALCELL)
2576 afs_stats_cmperf.vlocalAccesses++;
2578 afs_stats_cmperf.vremoteAccesses++;
2580 *avcp = tvc; /* May be null */
2582 ReleaseSharedLock(&afs_xvcache);
2583 return (tvc ? 1 : 0);
2585 } /*afs_NFSFindVCache*/
2593 * Initialize vcache related variables
2595 void afs_vcacheInit(int astatSize)
2597 register struct vcache *tvp;
2599 #if defined(AFS_OSF_ENV)
2600 if (!afs_maxvcount) {
2601 #if defined(AFS_OSF30_ENV)
2602 afs_maxvcount = max_vnodes/2; /* limit ourselves to half the total */
2604 afs_maxvcount = nvnode/2; /* limit ourselves to half the total */
2606 if (astatSize < afs_maxvcount) {
2607 afs_maxvcount = astatSize;
2610 #else /* AFS_OSF_ENV */
2611 freeVCList = (struct vcache *)0;
2614 RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
2615 LOCK_INIT(&afs_xvcb, "afs_xvcb");
2617 #if !defined(AFS_OSF_ENV)
2618 /* Allocate and thread the struct vcache entries */
2619 tvp = (struct vcache *) afs_osi_Alloc(astatSize * sizeof(struct vcache));
2620 memset((char *)tvp, 0, sizeof(struct vcache)*astatSize);
2622 Initial_freeVCList = tvp;
2623 freeVCList = &(tvp[0]);
2624 for(i=0; i < astatSize-1; i++) {
2625 tvp[i].nextfree = &(tvp[i+1]);
2627 tvp[astatSize-1].nextfree = (struct vcache *) 0;
2628 #ifdef AFS_AIX32_ENV
2629 pin((char *)tvp, astatSize * sizeof(struct vcache)); /* XXX */
2634 #if defined(AFS_SGI_ENV)
2635 for(i=0; i < astatSize; i++) {
2636 char name[METER_NAMSZ];
2637 struct vcache *tvc = &tvp[i];
2639 tvc->v.v_number = ++afsvnumbers;
2640 tvc->vc_rwlockid = OSI_NO_LOCKID;
2641 initnsema(&tvc->vc_rwlock, 1, makesname(name, "vrw", tvc->v.v_number));
2642 #ifndef AFS_SGI53_ENV
2643 initnsema(&tvc->v.v_sync, 0, makesname(name, "vsy", tvc->v.v_number));
2645 #ifndef AFS_SGI62_ENV
2646 initnlock(&tvc->v.v_lock, makesname(name, "vlk", tvc->v.v_number));
2647 #endif /* AFS_SGI62_ENV */
2660 void shutdown_vcache(void)
2663 struct afs_cbr *tsp, *nsp;
2665 * XXX We may potentially miss some of the vcaches because if when there're no
2666 * free vcache entries and all the vcache entries are active ones then we allocate
2667 * an additional one - admittedly we almost never had that occur.
2669 #if !defined(AFS_OSF_ENV)
2670 afs_osi_Free(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
2672 #ifdef AFS_AIX32_ENV
2673 unpin(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
2677 register struct afs_q *tq, *uq;
2678 register struct vcache *tvc;
2679 for (tq = VLRU.prev; tq != &VLRU; tq = uq) {
2683 osi_FreeSmallSpace(tvc->mvid);
2684 tvc->mvid = (struct VenusFid*)0;
2687 aix_gnode_rele((struct vnode *)tvc);
2689 if (tvc->linkData) {
2690 afs_osi_Free(tvc->linkData, strlen(tvc->linkData)+1);
2695 * Also free the remaining ones in the Cache
2697 for (i=0; i < VCSIZE; i++) {
2698 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2700 osi_FreeSmallSpace(tvc->mvid);
2701 tvc->mvid = (struct VenusFid*)0;
2705 afs_osi_Free(tvc->v.v_gnode, sizeof(struct gnode));
2706 #ifdef AFS_AIX32_ENV
2709 vms_delete(tvc->segid);
2711 tvc->segid = tvc->vmh = NULL;
2712 if (VREFCOUNT(tvc)) osi_Panic("flushVcache: vm race");
2720 #if defined(AFS_SUN5_ENV)
2726 if (tvc->linkData) {
2727 afs_osi_Free(tvc->linkData, strlen(tvc->linkData)+1);
2731 afs_FreeAllAxs(&(tvc->Access));
2737 * Free any leftover callback queue
2739 for (tsp = afs_cbrSpace; tsp; tsp = nsp ) {
2741 afs_osi_Free((char *)tsp, AFS_NCBRS * sizeof(struct afs_cbr));
2745 #if !defined(AFS_OSF_ENV)
2746 freeVCList = Initial_freeVCList = 0;
2748 RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
2749 LOCK_INIT(&afs_xvcb, "afs_xvcb");