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(AFSTOV(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(AFSTOV(avc));
218 AFS_RELE(AFSTOV(avc));
220 if (afs_norefpanic) {
221 printf ("flush vc refcnt < 1");
223 (void) vgone(avc, VX_NOSLEEP, (struct vnodeops *) 0);
225 VN_UNLOCK(AFSTOV(avc));
227 else osi_Panic ("flush vc refcnt < 1");
229 #endif /* AFS_OSF_ENV */
230 avc->states |= CVFlushed;
235 VN_UNLOCK(AFSTOV(avc));
239 } /*afs_FlushVCache*/
245 * The core of the inactive vnode op for all but IRIX.
247 void afs_InactiveVCache(struct vcache *avc, struct AFS_UCRED *acred)
249 extern afs_rwlock_t afs_xdcache, afs_xvcache;
251 AFS_STATCNT(afs_inactive);
252 if (avc->states & CDirty) {
253 /* we can't keep trying to push back dirty data forever. Give up. */
254 afs_InvalidateAllSegments(avc); /* turns off dirty bit */
256 avc->states &= ~CMAPPED; /* mainly used by SunOS 4.0.x */
257 avc->states &= ~CDirty; /* Turn it off */
258 if (avc->states & CUnlinked) {
259 if (CheckLock(&afs_xvcache) || CheckLock(&afs_xdcache)) {
260 avc->states |= CUnlinkedDel;
263 afs_remunlink(avc, 1); /* ignore any return code */
272 * Description: allocate a callback return structure from the
273 * free list and return it.
275 * Env: The alloc and free routines are both called with the afs_xvcb lock
276 * held, so we don't have to worry about blocking in osi_Alloc.
278 static struct afs_cbr *afs_cbrSpace = 0;
279 struct afs_cbr *afs_AllocCBR() {
280 register struct afs_cbr *tsp;
283 while (!afs_cbrSpace) {
284 if (afs_stats_cmperf.CallBackAlloced >= 2) {
285 /* don't allocate more than 2 * AFS_NCBRS for now */
287 afs_stats_cmperf.CallBackFlushes++;
291 tsp = (struct afs_cbr *) afs_osi_Alloc(AFS_NCBRS * sizeof(struct afs_cbr));
292 for(i=0; i < AFS_NCBRS-1; i++) {
293 tsp[i].next = &tsp[i+1];
295 tsp[AFS_NCBRS-1].next = 0;
297 afs_stats_cmperf.CallBackAlloced++;
301 afs_cbrSpace = tsp->next;
308 * Description: free a callback return structure.
311 * asp -- the address of the structure to free.
313 * Environment: the xvcb lock is held over these calls.
316 register struct afs_cbr *asp; {
317 asp->next = afs_cbrSpace;
325 * Description: flush all queued callbacks to all servers.
329 * Environment: holds xvcb lock over RPC to guard against race conditions
330 * when a new callback is granted for the same file later on.
332 afs_int32 afs_FlushVCBs (afs_int32 lockit)
334 struct AFSFid tfids[AFS_MAXCBRSCALL];
335 struct AFSCallBack callBacks[1];
336 struct AFSCBFids fidArray;
337 struct AFSCBs cbArray;
339 struct afs_cbr *tcbrp;
343 struct vrequest treq;
345 int safety1, safety2, safety3;
346 extern int afs_totalServers;
349 if (code = afs_InitReq(&treq, &afs_osi_cred)) return code;
350 treq.flags |= O_NONBLOCK;
352 if (lockit) MObtainWriteLock(&afs_xvcb,273);
353 ObtainReadLock(&afs_xserver);
354 for(i=0; i<NSERVERS; i++) {
355 for(safety1 = 0, tsp = afs_servers[i];
356 tsp && safety1 < afs_totalServers+10; tsp=tsp->next, safety1++) {
358 if (tsp->cbrs == (struct afs_cbr *) 0) continue;
360 /* otherwise, grab a block of AFS_MAXCBRSCALL from the list
361 * and make an RPC, over and over again.
363 tcount = 0; /* number found so far */
364 for (safety2 = 0; safety2 < afs_cacheStats ; safety2++) {
365 if (tcount >= AFS_MAXCBRSCALL || !tsp->cbrs) {
366 /* if buffer is full, or we've queued all we're going
367 * to from this server, we should flush out the
370 fidArray.AFSCBFids_len = tcount;
371 fidArray.AFSCBFids_val = (struct AFSFid *) tfids;
372 cbArray.AFSCBs_len = 1;
373 cbArray.AFSCBs_val = callBacks;
374 callBacks[0].CallBackType = CB_EXCLUSIVE;
375 for (safety3 = 0; safety3 < MAXHOSTS*2; safety3++) {
376 tc = afs_ConnByHost(tsp, tsp->cell->fsport,
377 tsp->cell->cell, &treq, 0,
380 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_GIVEUPCALLBACKS);
382 code = RXAFS_GiveUpCallBacks(tc->id, &fidArray,
388 if (!afs_Analyze(tc, code, 0, &treq,
389 AFS_STATS_FS_RPCIDX_GIVEUPCALLBACKS,
390 SHARED_LOCK, tsp->cell)) {
394 /* ignore return code, since callbacks may have
395 * been returned anyway, we shouldn't leave them
396 * around to be returned again.
398 * Next, see if we are done with this server, and if so,
399 * break to deal with the next one.
401 if (!tsp->cbrs) break;
403 } /* if to flush full buffer */
404 /* if we make it here, we have an entry at the head of cbrs,
405 * which we should copy to the file ID array and then free.
408 tfids[tcount++] = tcbrp->fid;
409 tsp->cbrs = tcbrp->next;
411 } /* while loop for this one server */
412 if (safety2 > afs_cacheStats) {
413 afs_warn("possible internal error afs_flushVCBs (%d)\n", safety2);
415 } /* for loop for this hash chain */
416 } /* loop through all hash chains */
417 if (safety1 > afs_totalServers+2) {
418 afs_warn("AFS internal error (afs_flushVCBs) (%d > %d), continuing...\n", safety1, afs_totalServers+2);
420 osi_Panic("afs_flushVCBS safety1");
423 ReleaseReadLock(&afs_xserver);
424 if (lockit) MReleaseWriteLock(&afs_xvcb);
432 * Queue a callback on the given fid.
438 * Locks the xvcb lock.
439 * Called when the xvcache lock is already held.
442 static afs_int32 afs_QueueVCB(struct vcache *avc)
444 register struct server *tsp;
445 register struct afs_cbr *tcbp;
447 AFS_STATCNT(afs_QueueVCB);
448 /* The callback is really just a struct server ptr. */
449 tsp = (struct server *)(avc->callback);
451 /* we now have a pointer to the server, so we just allocate
452 * a queue entry and queue it.
454 MObtainWriteLock(&afs_xvcb,274);
455 tcbp = afs_AllocCBR();
456 tcbp->fid = avc->fid.Fid;
457 tcbp->next = tsp->cbrs;
460 /* now release locks and return */
461 MReleaseWriteLock(&afs_xvcb);
465 #ifdef AFS_LINUX22_ENV
466 /* afs_TryFlushDcacheChildren -- Shakes loose vcache references held by
467 * children of the dentry
469 * LOCKS -- Called with afs_xvcache write locked. Drops and reaquires
470 * AFS_GLOCK, so it can call dput, which may call iput, but
471 * keeps afs_xvcache exclusively.
473 * Tree traversal algorithm from fs/dcache.c: select_parent()
475 static void afs_TryFlushDcacheChildren(struct dentry *parent)
477 struct dentry *this_parent = parent;
478 struct list_head *next;
481 next = this_parent->d_subdirs.next;
484 while (next != &this_parent->d_subdirs) {
485 struct list_head *tmp = next;
486 struct dentry *dentry = list_entry(tmp, struct dentry, d_child);
489 if (!DCOUNT(dentry) && !dentry->d_inode) {
499 * Descend a level if the d_subdirs list is non-empty.
501 if (!list_empty(&dentry->d_subdirs)) {
502 this_parent = dentry;
509 * All done at this level ... ascend and resume the search.
511 if (this_parent != parent) {
512 next = this_parent->d_child.next;
513 this_parent = this_parent->d_parent;
517 #endif /* AFS_LINUX22_ENV */
523 * Remove a queued callback by looking through all the servers
524 * to see if any have this callback queued.
527 * afid: The fid we want cleansed of queued callbacks.
530 * Locks xvcb and xserver locks.
531 * Typically called with xdcache, xvcache and/or individual vcache
536 register struct VenusFid *afid;
541 register struct server *tsp;
542 register struct afs_cbr *tcbrp;
543 struct afs_cbr **lcbrpp;
545 AFS_STATCNT(afs_RemoveVCB);
546 MObtainWriteLock(&afs_xvcb,275);
547 ObtainReadLock(&afs_xserver);
548 for(i=0;i<NSERVERS;i++) {
549 for(tsp=afs_servers[i]; tsp; tsp=tsp->next) {
550 /* if cell is known, and is wrong, then skip this server */
551 if (tsp->cell && tsp->cell->cell != afid->Cell) continue;
554 * Otherwise, iterate through file IDs we're sending to the
557 lcbrpp = &tsp->cbrs; /* first queued return callback */
558 for(tcbrp = *lcbrpp; tcbrp; lcbrpp = &tcbrp->next, tcbrp = *lcbrpp) {
559 if (afid->Fid.Volume == tcbrp->fid.Volume &&
560 afid->Fid.Unique == tcbrp->fid.Unique &&
561 afid->Fid.Vnode == tcbrp->fid.Vnode) {
562 *lcbrpp = tcbrp->next; /* unthread from list */
570 ReleaseReadLock(&afs_xserver);
571 MReleaseWriteLock(&afs_xvcb);
581 * This routine is responsible for allocating a new cache entry
582 * from the free list. It formats the cache entry and inserts it
583 * into the appropriate hash tables. It must be called with
584 * afs_xvcache write-locked so as to prevent several processes from
585 * trying to create a new cache entry simultaneously.
588 * afid : The file id of the file whose cache entry is being
591 /* LOCK: afs_NewVCache afs_xvcache W */
592 struct vcache *afs_NewVCache(struct VenusFid *afid, struct server *serverp,
593 afs_int32 lockit, afs_int32 locktype)
597 afs_int32 anumber = VCACHE_FREE;
599 struct gnode *gnodepnt;
602 struct vm_info * vm_info_ptr;
603 #endif /* AFS_MACH_ENV */
606 #endif /* AFS_OSF_ENV */
607 struct afs_q *tq, *uq;
610 AFS_STATCNT(afs_NewVCache);
611 #ifdef AFS_LINUX22_ENV
613 /* Free some if possible. */
614 struct afs_q *tq, *uq;
615 int i; char *panicstr;
616 int vmax = 2 * afs_cacheStats;
617 int vn = VCACHE_FREE;
620 for(tq = VLRU.prev; tq != &VLRU && vn > 0; tq = uq) {
623 if (tvc->states & CVFlushed)
624 refpanic ("CVFlushed on VLRU");
626 refpanic ("Exceeded pool of AFS vnodes(VLRU cycle?)");
627 else if (QNext(uq) != tq)
628 refpanic ("VLRU inconsistent");
630 if (tvc == afs_globalVp)
633 if ( VREFCOUNT(tvc) && tvc->opens == 0 ) {
634 struct inode *ip = AFSTOI(tvc);
635 if (list_empty(&ip->i_dentry)) {
639 struct list_head *cur;
640 struct list_head *head = &ip->i_dentry;
645 while ((cur = cur->next) != head) {
646 struct dentry *dentry = list_entry(cur, struct dentry, d_alias);
647 if (DCOUNT(dentry)) {
648 afs_TryFlushDcacheChildren(dentry);
651 if (!DCOUNT(dentry)) {
671 #endif /* AFS_LINUX22_ENV */
674 if (afs_vcount >= afs_maxvcount)
677 * If we are using > 33 % of the total system vnodes for AFS vcache
678 * entries or we are using the maximum number of vcache entries,
679 * then free some. (if our usage is > 33% we should free some, if
680 * our usage is > afs_maxvcount, set elsewhere to 0.5*nvnode,
681 * we _must_ free some -- no choice).
683 if ( (( 3 * afs_vcount ) > nvnode) || ( afs_vcount >= afs_maxvcount ))
686 struct afs_q *tq, *uq;
687 int i; char *panicstr;
690 for(tq = VLRU.prev; tq != &VLRU && anumber > 0; tq = uq) {
693 if (tvc->states & CVFlushed)
694 refpanic ("CVFlushed on VLRU");
695 else if (i++ > afs_maxvcount)
696 refpanic ("Exceeded pool of AFS vnodes(VLRU cycle?)");
697 else if (QNext(uq) != tq)
698 refpanic ("VLRU inconsistent");
699 else if (VREFCOUNT(tvc) < 1)
700 refpanic ("refcnt 0 on VLRU");
702 if ( VREFCOUNT(tvc) == 1 && tvc->opens == 0
703 && (tvc->states & CUnlinkedDel) == 0) {
704 code = afs_FlushVCache(tvc, &fv_slept);
711 continue; /* start over - may have raced. */
716 if (anumber == VCACHE_FREE) {
717 printf("NewVCache: warning none freed, using %d of %d\n",
718 afs_vcount, afs_maxvcount);
719 if (afs_vcount >= afs_maxvcount) {
720 osi_Panic("NewVCache - none freed");
721 /* XXX instead of panicing, should do afs_maxvcount++
722 and magic up another one */
728 if (getnewvnode(MOUNT_AFS, &Afs_vnodeops, &nvc)) {
729 /* What should we do ???? */
730 osi_Panic("afs_NewVCache: no more vnodes");
735 tvc->nextfree = (struct vcache *)0;
737 #else /* AFS_OSF_ENV */
738 /* pull out a free cache entry */
741 for(tq = VLRU.prev; (anumber > 0) && (tq != &VLRU); tq = uq) {
745 if (tvc->states & CVFlushed)
746 refpanic("CVFlushed on VLRU");
747 else if (i++ > 2*afs_cacheStats) /* even allowing for a few xallocs...*/
748 refpanic("Increase -stat parameter of afsd(VLRU cycle?)");
749 else if (QNext(uq) != tq)
750 refpanic("VLRU inconsistent");
752 #ifdef AFS_DARWIN_ENV
753 if (tvc->opens == 0 && ((tvc->states & CUnlinkedDel) == 0) &&
754 VREFCOUNT(tvc) == 1 && UBCINFOEXISTS(&tvc->v)) {
755 osi_VM_TryReclaim(tvc, &fv_slept);
759 continue; /* start over - may have raced. */
763 #if defined(AFS_FBSD_ENV)
764 if (VREFCOUNT(tvc) == 1 && tvc->opens == 0
765 && (tvc->states & CUnlinkedDel) == 0) {
766 if (!(VOP_LOCK(&tvc->v, LK_EXCLUSIVE, curproc))) {
767 if (VREFCOUNT(tvc) == 1 && tvc->opens == 0
768 && (tvc->states & CUnlinkedDel) == 0) {
770 AFS_GUNLOCK(); /* perhaps inline inactive for locking */
771 VOP_INACTIVE(&tvc->v, curproc);
774 VOP_UNLOCK(&tvc->v, 0, curproc);
779 if (VREFCOUNT(tvc) == 0 && tvc->opens == 0
780 && (tvc->states & CUnlinkedDel) == 0) {
781 code = afs_FlushVCache(tvc, &fv_slept);
788 continue; /* start over - may have raced. */
791 if (tq == uq ) break;
795 /* none free, making one is better than a panic */
796 afs_stats_cmperf.vcacheXAllocs++; /* count in case we have a leak */
797 tvc = (struct vcache *) afs_osi_Alloc(sizeof (struct vcache));
799 pin((char *)tvc, sizeof(struct vcache)); /* XXX */
802 /* In case it still comes here we need to fill this */
803 tvc->v.v_vm_info = VM_INFO_NULL;
804 vm_info_init(tvc->v.v_vm_info);
805 /* perhaps we should also do close_flush on non-NeXT mach systems;
806 * who knows; we don't currently have the sources.
808 #endif /* AFS_MACH_ENV */
809 #if defined(AFS_SGI_ENV)
810 { char name[METER_NAMSZ];
811 memset(tvc, 0, sizeof(struct vcache));
812 tvc->v.v_number = ++afsvnumbers;
813 tvc->vc_rwlockid = OSI_NO_LOCKID;
814 initnsema(&tvc->vc_rwlock, 1, makesname(name, "vrw", tvc->v.v_number));
815 #ifndef AFS_SGI53_ENV
816 initnsema(&tvc->v.v_sync, 0, makesname(name, "vsy", tvc->v.v_number));
818 #ifndef AFS_SGI62_ENV
819 initnlock(&tvc->v.v_lock, makesname(name, "vlk", tvc->v.v_number));
822 #endif /* AFS_SGI_ENV */
825 tvc = freeVCList; /* take from free list */
826 freeVCList = tvc->nextfree;
827 tvc->nextfree = (struct vcache *)0;
829 #endif /* AFS_OSF_ENV */
832 vm_info_ptr = tvc->v.v_vm_info;
833 #endif /* AFS_MACH_ENV */
835 #if !defined(AFS_SGI_ENV) && !defined(AFS_OSF_ENV)
836 memset((char *)tvc, 0, sizeof(struct vcache));
841 RWLOCK_INIT(&tvc->lock, "vcache lock");
842 #if defined(AFS_SUN5_ENV)
843 RWLOCK_INIT(&tvc->vlock, "vcache vlock");
844 #endif /* defined(AFS_SUN5_ENV) */
847 tvc->v.v_vm_info = vm_info_ptr;
848 tvc->v.v_vm_info->pager = MEMORY_OBJECT_NULL;
849 #endif /* AFS_MACH_ENV */
850 tvc->parentVnode = 0;
851 tvc->mvid = (struct VenusFid *) 0;
852 tvc->linkData = (char *) 0;
855 tvc->execsOrWriters = 0;
859 tvc->last_looker = 0;
861 tvc->asynchrony = -1;
863 afs_symhint_inval(tvc);
865 tvc->flushDV.low = tvc->flushDV.high = AFS_MAXDV;
868 tvc->truncPos = AFS_NOTRUNC; /* don't truncate until we need to */
869 hzero(tvc->m.DataVersion); /* in case we copy it into flushDV */
871 /* Hold it for the LRU (should make count 2) */
872 VN_HOLD(AFSTOV(tvc));
873 #else /* AFS_OSF_ENV */
874 VREFCOUNT_SET(tvc, 1); /* us */
875 #endif /* AFS_OSF_ENV */
877 LOCK_INIT(&tvc->pvmlock, "vcache pvmlock");
878 tvc->vmh = tvc->segid = NULL;
881 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
882 #if defined(AFS_SUN5_ENV)
883 rw_init(&tvc->rwlock, "vcache rwlock", RW_DEFAULT, NULL);
885 #if defined(AFS_SUN55_ENV)
886 /* This is required if the kaio (kernel aynchronous io)
887 ** module is installed. Inside the kernel, the function
888 ** check_vp( common/os/aio.c) checks to see if the kernel has
889 ** to provide asynchronous io for this vnode. This
890 ** function extracts the device number by following the
891 ** v_data field of the vnode. If we do not set this field
892 ** then the system panics. The value of the v_data field
893 ** is not really important for AFS vnodes because the kernel
894 ** does not do asynchronous io for regular files. Hence,
895 ** for the time being, we fill up the v_data field with the
896 ** vnode pointer itself. */
897 tvc->v.v_data = (char *)tvc;
898 #endif /* AFS_SUN55_ENV */
900 afs_BozonInit(&tvc->pvnLock, tvc);
904 tvc->callback = serverp; /* to minimize chance that clear
906 /* initialize vnode data, note vrefCount is v.v_count */
908 /* Don't forget to free the gnode space */
909 tvc->v.v_gnode = gnodepnt = (struct gnode *) osi_AllocSmallSpace(sizeof(struct gnode));
910 memset((char *)gnodepnt, 0, sizeof(struct gnode));
913 memset((void*)&(tvc->vc_bhv_desc), 0, sizeof(tvc->vc_bhv_desc));
914 bhv_desc_init(&(tvc->vc_bhv_desc), tvc, tvc, &Afs_vnodeops);
916 vn_bhv_head_init(&(tvc->v.v_bh), "afsvp");
917 vn_bhv_insert_initial(&(tvc->v.v_bh), &(tvc->vc_bhv_desc));
919 bhv_head_init(&(tvc->v.v_bh));
920 bhv_insert_initial(&(tvc->v.v_bh), &(tvc->vc_bhv_desc));
923 tvc->v.v_mreg = tvc->v.v_mregb = (struct pregion*)tvc;
925 tvc->v.v_trace = ktrace_alloc(VNODE_TRACE_SIZE, 0);
927 init_bitlock(&tvc->v.v_pcacheflag, VNODE_PCACHE_LOCKBIT, "afs_pcache",
929 init_mutex(&tvc->v.v_filocksem, MUTEX_DEFAULT, "afsvfl", (long)tvc);
930 init_mutex(&tvc->v.v_buf_lock, MUTEX_DEFAULT, "afsvnbuf", (long)tvc);
932 vnode_pcache_init(&tvc->v);
933 #if defined(DEBUG) && defined(VNODE_INIT_BITLOCK)
934 /* Above define is never true execpt in SGI test kernels. */
935 init_bitlock(&(tvc->v.v_flag, VLOCK, "vnode", tvc->v.v_number);
938 AFS_VN_INIT_BUF_LOCK(&(tvc->v));
941 SetAfsVnode(AFSTOV(tvc));
942 #endif /* AFS_SGI64_ENV */
943 #ifdef AFS_DARWIN_ENV
944 tvc->v.v_ubcinfo = UBC_INFO_NULL;
945 lockinit(&tvc->rwlock, PINOD, "vcache rwlock", 0, 0);
946 cache_purge(AFSTOV(tvc));
949 /* VLISTNONE(&tvc->v); */
950 tvc->v.v_freelist.tqe_next=0;
951 tvc->v.v_freelist.tqe_prev=(struct vnode **)0xdeadb;
952 /*tvc->vrefCount++;*/
955 lockinit(&tvc->rwlock, PINOD, "vcache rwlock", 0, 0);
956 cache_purge(AFSTOV(tvc));
959 tvc->v.v_usecount++; /* steal an extra ref for now so vfree never happens */
960 /* This extra ref is dealt with above... */
963 * The proper value for mvstat (for root fids) is setup by the caller.
966 if (afid->Fid.Vnode == 1 && afid->Fid.Unique == 1)
968 if (afs_globalVFS == 0) osi_Panic("afs globalvfs");
969 vSetVfsp(tvc, afs_globalVFS);
972 tvc->v.v_vfsnext = afs_globalVFS->vfs_vnodes; /* link off vfs */
973 tvc->v.v_vfsprev = NULL;
974 afs_globalVFS->vfs_vnodes = &tvc->v;
975 if (tvc->v.v_vfsnext != NULL)
976 tvc->v.v_vfsnext->v_vfsprev = &tvc->v;
977 tvc->v.v_next = gnodepnt->gn_vnode; /*Single vnode per gnode for us!*/
978 gnodepnt->gn_vnode = &tvc->v;
981 tvc->v.g_dev = ((struct mount *)afs_globalVFS->vfs_data)->m_dev;
983 #if defined(AFS_DUX40_ENV)
984 insmntque(tvc, afs_globalVFS, &afs_ubcops);
987 /* Is this needed??? */
988 insmntque(tvc, afs_globalVFS);
989 #endif /* AFS_OSF_ENV */
990 #endif /* AFS_DUX40_ENV */
991 #if defined(AFS_SGI_ENV)
992 VN_SET_DPAGES(&(tvc->v), (struct pfdat*)NULL);
993 osi_Assert((tvc->v.v_flag & VINACT) == 0);
995 osi_Assert(VN_GET_PGCNT(&(tvc->v)) == 0);
996 osi_Assert(tvc->mapcnt == 0 && tvc->vc_locktrips == 0);
997 osi_Assert(tvc->vc_rwlockid == OSI_NO_LOCKID);
998 osi_Assert(tvc->v.v_filocks == NULL);
999 #if !defined(AFS_SGI65_ENV)
1000 osi_Assert(tvc->v.v_filocksem == NULL);
1002 osi_Assert(tvc->cred == NULL);
1003 #ifdef AFS_SGI64_ENV
1004 vnode_pcache_reinit(&tvc->v);
1005 tvc->v.v_rdev = NODEV;
1007 vn_initlist((struct vnlist *)&tvc->v);
1009 #endif /* AFS_SGI_ENV */
1010 #if defined(AFS_LINUX22_ENV)
1012 struct inode *ip = AFSTOI(tvc);
1013 sema_init(&ip->i_sem, 1);
1014 #if defined(AFS_LINUX24_ENV)
1015 sema_init(&ip->i_zombie, 1);
1016 init_waitqueue_head(&ip->i_wait);
1017 spin_lock_init(&ip->i_data.i_shared_lock);
1018 #ifdef STRUCT_ADDRESS_SPACE_HAS_PAGE_LOCK
1019 spin_lock_init(&ip->i_data.page_lock);
1021 INIT_LIST_HEAD(&ip->i_data.clean_pages);
1022 INIT_LIST_HEAD(&ip->i_data.dirty_pages);
1023 INIT_LIST_HEAD(&ip->i_data.locked_pages);
1024 INIT_LIST_HEAD(&ip->i_dirty_buffers);
1025 #ifdef STRUCT_INODE_HAS_I_DIRTY_DATA_BUFFERS
1026 INIT_LIST_HEAD(&ip->i_dirty_data_buffers);
1028 #ifdef STRUCT_INODE_HAS_I_DEVICES
1029 INIT_LIST_HEAD(&ip->i_devices);
1031 ip->i_data.host = (void*) ip;
1032 ip->i_mapping = &ip->i_data;
1033 #ifdef STRUCT_INODE_HAS_I_TRUNCATE_SEM
1034 init_rwsem(&ip->i_truncate_sem);
1037 sema_init(&ip->i_atomic_write, 1);
1038 init_waitqueue(&ip->i_wait);
1040 INIT_LIST_HEAD(&ip->i_hash);
1041 INIT_LIST_HEAD(&ip->i_dentry);
1042 if (afs_globalVFS) {
1043 ip->i_dev = afs_globalVFS->s_dev;
1044 ip->i_sb = afs_globalVFS;
1049 osi_dnlc_purgedp(tvc); /* this may be overkill */
1050 memset((char *)&(tvc->quick), 0, sizeof(struct vtodc));
1051 memset((char *)&(tvc->callsort), 0, sizeof(struct afs_q));
1052 tvc->slocks = (struct SimpleLocks *)0;
1055 tvc->hnext = afs_vhashT[i];
1056 afs_vhashT[i] = tvc;
1057 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
1058 refpanic ("NewVCache VLRU inconsistent");
1060 QAdd(&VLRU, &tvc->vlruq); /* put in lruq */
1061 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
1062 refpanic ("NewVCache VLRU inconsistent2");
1064 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
1065 refpanic ("NewVCache VLRU inconsistent3");
1067 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
1068 refpanic ("NewVCache VLRU inconsistent4");
1078 * afs_FlushActiveVcaches
1084 * doflocks : Do we handle flocks?
1086 /* LOCK: afs_FlushActiveVcaches afs_xvcache N */
1088 afs_FlushActiveVcaches(doflocks)
1089 register afs_int32 doflocks;
1091 { /*afs_FlushActiveVcaches*/
1093 register struct vcache *tvc;
1095 register struct conn *tc;
1096 register afs_int32 code;
1097 register struct AFS_UCRED *cred;
1098 struct vrequest treq, ureq;
1099 struct AFSVolSync tsync;
1103 AFS_STATCNT(afs_FlushActiveVcaches);
1104 ObtainReadLock(&afs_xvcache);
1105 for(i=0;i<VCSIZE;i++) {
1106 for(tvc = afs_vhashT[i]; tvc; tvc=tvc->hnext) {
1107 if (doflocks && tvc->flockCount != 0) {
1108 /* if this entry has an flock, send a keep-alive call out */
1110 ReleaseReadLock(&afs_xvcache);
1111 ObtainWriteLock(&tvc->lock,51);
1113 afs_InitReq(&treq, &afs_osi_cred);
1114 treq.flags |= O_NONBLOCK;
1116 tc = afs_Conn(&tvc->fid, &treq, SHARED_LOCK);
1118 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_EXTENDLOCK);
1121 RXAFS_ExtendLock(tc->id,
1122 (struct AFSFid *) &tvc->fid.Fid,
1129 (afs_Analyze(tc, code, &tvc->fid, &treq,
1130 AFS_STATS_FS_RPCIDX_EXTENDLOCK,
1131 SHARED_LOCK, (struct cell *)0));
1133 ReleaseWriteLock(&tvc->lock);
1134 ObtainReadLock(&afs_xvcache);
1138 if ((tvc->states & CCore) || (tvc->states & CUnlinkedDel)) {
1140 * Don't let it evaporate in case someone else is in
1141 * this code. Also, drop the afs_xvcache lock while
1142 * getting vcache locks.
1145 ReleaseReadLock(&afs_xvcache);
1146 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1147 afs_BozonLock(&tvc->pvnLock, tvc);
1149 #if defined(AFS_SGI_ENV)
1151 * That's because if we come in via the CUnlinkedDel bit state path we'll be have 0 refcnt
1153 osi_Assert(VREFCOUNT(tvc) > 0);
1154 AFS_RWLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1156 ObtainWriteLock(&tvc->lock,52);
1157 if (tvc->states & CCore) {
1158 tvc->states &= ~CCore;
1159 /* XXXX Find better place-holder for cred XXXX */
1160 cred = (struct AFS_UCRED *) tvc->linkData;
1161 tvc->linkData = (char *) 0; /* XXX */
1162 afs_InitReq(&ureq, cred);
1163 afs_Trace2(afs_iclSetp, CM_TRACE_ACTCCORE,
1164 ICL_TYPE_POINTER, tvc,
1165 ICL_TYPE_INT32, tvc->execsOrWriters);
1166 code = afs_StoreOnLastReference(tvc, &ureq);
1167 ReleaseWriteLock(&tvc->lock);
1168 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1169 afs_BozonUnlock(&tvc->pvnLock, tvc);
1171 hzero(tvc->flushDV);
1174 if (code && code != VNOVNODE) {
1175 afs_StoreWarn(code, tvc->fid.Fid.Volume,
1176 /* /dev/console */ 1);
1178 } else if (tvc->states & CUnlinkedDel) {
1182 ReleaseWriteLock(&tvc->lock);
1183 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1184 afs_BozonUnlock(&tvc->pvnLock, tvc);
1186 #if defined(AFS_SGI_ENV)
1187 AFS_RWUNLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1189 afs_remunlink(tvc, 0);
1190 #if defined(AFS_SGI_ENV)
1191 AFS_RWLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1195 /* lost (or won, perhaps) the race condition */
1196 ReleaseWriteLock(&tvc->lock);
1197 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1198 afs_BozonUnlock(&tvc->pvnLock, tvc);
1201 #if defined(AFS_SGI_ENV)
1202 AFS_RWUNLOCK((vnode_t *)tvc, VRWLOCK_WRITE);
1204 ObtainReadLock(&afs_xvcache);
1210 AFS_RELE(AFSTOV(tvc));
1212 /* Matches write code setting CCore flag */
1216 #ifdef AFS_DARWIN_ENV
1217 if (VREFCOUNT(tvc) == 1 && UBCINFOEXISTS(&tvc->v)) {
1218 if (tvc->opens) panic("flushactive open, hasubc, but refcnt 1");
1219 osi_VM_TryReclaim(tvc,0);
1224 ReleaseReadLock(&afs_xvcache);
1226 } /*afs_FlushActiveVcaches*/
1233 * Make sure a cache entry is up-to-date status-wise.
1235 * NOTE: everywhere that calls this can potentially be sped up
1236 * by checking CStatd first, and avoiding doing the InitReq
1237 * if this is up-to-date.
1239 * Anymore, the only places that call this KNOW already that the
1240 * vcache is not up-to-date, so we don't screw around.
1243 * avc : Ptr to vcache entry to verify.
1247 int afs_VerifyVCache2(struct vcache *avc, struct vrequest *areq)
1249 register struct vcache *tvc;
1251 AFS_STATCNT(afs_VerifyVCache);
1253 #if defined(AFS_OSF_ENV)
1254 ObtainReadLock(&avc->lock);
1255 if (afs_IsWired(avc)) {
1256 ReleaseReadLock(&avc->lock);
1259 ReleaseReadLock(&avc->lock);
1260 #endif /* AFS_OSF_ENV */
1261 /* otherwise we must fetch the status info */
1263 ObtainWriteLock(&avc->lock,53);
1264 if (avc->states & CStatd) {
1265 ReleaseWriteLock(&avc->lock);
1268 ObtainWriteLock(&afs_xcbhash, 461);
1269 avc->states &= ~( CStatd | CUnique );
1270 avc->callback = (struct server *)0;
1271 afs_DequeueCallback(avc);
1272 ReleaseWriteLock(&afs_xcbhash);
1273 ReleaseWriteLock(&avc->lock);
1275 /* since we've been called back, or the callback has expired,
1276 * it's possible that the contents of this directory, or this
1277 * file's name have changed, thus invalidating the dnlc contents.
1279 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
1280 osi_dnlc_purgedp (avc);
1282 osi_dnlc_purgevp (avc);
1284 /* fetch the status info */
1285 tvc = afs_GetVCache(&avc->fid, areq, (afs_int32*)0, avc, READ_LOCK);
1286 if (!tvc) return ENOENT;
1287 /* Put it back; caller has already incremented vrefCount */
1288 afs_PutVCache(tvc, READ_LOCK);
1291 } /*afs_VerifyVCache*/
1298 * Simple copy of stat info into cache.
1301 * avc : Ptr to vcache entry involved.
1302 * astat : Ptr to stat info to copy.
1305 * Nothing interesting.
1307 * Callers: as of 1992-04-29, only called by WriteVCache
1310 afs_SimpleVStat(avc, astat, areq)
1311 register struct vcache *avc;
1312 register struct AFSFetchStatus *astat;
1313 struct vrequest *areq;
1314 { /*afs_SimpleVStat*/
1317 AFS_STATCNT(afs_SimpleVStat);
1320 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1321 && !AFS_VN_MAPPED((vnode_t*)avc))
1323 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc))
1327 #ifdef AFS_64BIT_ClIENT
1328 FillInt64(length, astat->Length_hi, astat->Length);
1329 #else /* AFS_64BIT_CLIENT */
1330 length = astat->Length;
1331 #endif /* AFS_64BIT_CLIENT */
1332 #if defined(AFS_SGI_ENV)
1333 osi_Assert((valusema(&avc->vc_rwlock) <= 0) &&
1334 (OSI_GET_LOCKID() == avc->vc_rwlockid));
1335 if (length < avc->m.Length) {
1336 vnode_t *vp = (vnode_t *)avc;
1338 osi_Assert(WriteLocked(&avc->lock));
1339 ReleaseWriteLock(&avc->lock);
1341 PTOSSVP(vp, (off_t)length, (off_t)MAXLONG);
1343 ObtainWriteLock(&avc->lock,67);
1346 /* if writing the file, don't fetch over this value */
1347 afs_Trace3(afs_iclSetp, CM_TRACE_SIMPLEVSTAT,
1348 ICL_TYPE_POINTER, avc,
1349 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length),
1350 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1351 avc->m.Length = length;
1352 avc->m.Date = astat->ClientModTime;
1354 avc->m.Owner = astat->Owner;
1355 avc->m.Group = astat->Group;
1356 avc->m.Mode = astat->UnixModeBits;
1357 if (vType(avc) == VREG) {
1358 avc->m.Mode |= S_IFREG;
1360 else if (vType(avc) == VDIR) {
1361 avc->m.Mode |= S_IFDIR;
1363 else if (vType(avc) == VLNK) {
1367 avc->m.Mode |= S_IFLNK;
1368 if ((avc->m.Mode & 0111) == 0) avc->mvstat = 1;
1370 if (avc->states & CForeign) {
1371 struct axscache *ac;
1372 avc->anyAccess = astat->AnonymousAccess;
1374 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1376 * Caller has at least one bit not covered by anonymous, and
1377 * thus may have interesting rights.
1379 * HOWEVER, this is a really bad idea, because any access query
1380 * for bits which aren't covered by anonymous, on behalf of a user
1381 * who doesn't have any special rights, will result in an answer of
1382 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1383 * It's an especially bad idea under Ultrix, since (due to the lack of
1384 * a proper access() call) it must perform several afs_access() calls
1385 * in order to create magic mode bits that vary according to who makes
1386 * the call. In other words, _every_ stat() generates a test for
1389 #endif /* badidea */
1390 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1391 ac->axess = astat->CallerAccess;
1392 else /* not found, add a new one if possible */
1393 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1397 } /*afs_SimpleVStat*/
1404 * Store the status info *only* back to the server for a
1408 * avc : Ptr to the vcache entry.
1409 * astatus : Ptr to the status info to store.
1410 * areq : Ptr to the associated vrequest.
1413 * Must be called with a shared lock held on the vnode.
1416 afs_WriteVCache(avc, astatus, areq)
1417 register struct vcache *avc;
1418 register struct AFSStoreStatus *astatus;
1419 struct vrequest *areq;
1421 { /*afs_WriteVCache*/
1424 struct AFSFetchStatus OutStatus;
1425 struct AFSVolSync tsync;
1428 AFS_STATCNT(afs_WriteVCache);
1429 afs_Trace2(afs_iclSetp, CM_TRACE_WVCACHE, ICL_TYPE_POINTER, avc,
1430 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
1433 tc = afs_Conn(&avc->fid, areq, SHARED_LOCK);
1435 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STORESTATUS);
1437 code = RXAFS_StoreStatus(tc->id,
1438 (struct AFSFid *) &avc->fid.Fid,
1439 astatus, &OutStatus, &tsync);
1445 (afs_Analyze(tc, code, &avc->fid, areq,
1446 AFS_STATS_FS_RPCIDX_STORESTATUS,
1447 SHARED_LOCK, (struct cell *)0));
1449 UpgradeSToWLock(&avc->lock,20);
1451 /* success, do the changes locally */
1452 afs_SimpleVStat(avc, &OutStatus, areq);
1454 * Update the date, too. SimpleVStat didn't do this, since
1455 * it thought we were doing this after fetching new status
1456 * over a file being written.
1458 avc->m.Date = OutStatus.ClientModTime;
1461 /* failure, set up to check with server next time */
1462 ObtainWriteLock(&afs_xcbhash, 462);
1463 afs_DequeueCallback(avc);
1464 avc->states &= ~( CStatd | CUnique); /* turn off stat valid flag */
1465 ReleaseWriteLock(&afs_xcbhash);
1466 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
1467 osi_dnlc_purgedp (avc); /* if it (could be) a directory */
1469 ConvertWToSLock(&avc->lock);
1472 } /*afs_WriteVCache*/
1478 * Copy astat block into vcache info
1481 * avc : Ptr to vcache entry.
1482 * astat : Ptr to stat block to copy in.
1483 * areq : Ptr to associated request.
1486 * Must be called under a write lock
1488 * Note: this code may get dataversion and length out of sync if the file has
1489 * been modified. This is less than ideal. I haven't thought about
1490 * it sufficiently to be certain that it is adequate.
1493 afs_ProcessFS(avc, astat, areq)
1494 register struct vcache *avc;
1495 struct vrequest *areq;
1496 register struct AFSFetchStatus *astat;
1502 AFS_STATCNT(afs_ProcessFS);
1504 #ifdef AFS_64BIT_CLIENT
1505 FillInt64(length, astat->Length_hi, astat->Length);
1506 #else /* AFS_64BIT_CLIENT */
1507 length = astat->Length;
1508 #endif /* AFS_64BIT_CLIENT */
1509 /* WARNING: afs_DoBulkStat uses the Length field to store a sequence
1510 * number for each bulk status request. Under no circumstances
1511 * should afs_DoBulkStat store a sequence number if the new
1512 * length will be ignored when afs_ProcessFS is called with
1513 * new stats. If you change the following conditional then you
1514 * also need to change the conditional in afs_DoBulkStat. */
1516 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1517 && !AFS_VN_MAPPED((vnode_t*)avc))
1519 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc))
1522 /* if we're writing or mapping this file, don't fetch over these
1525 afs_Trace3(afs_iclSetp, CM_TRACE_PROCESSFS, ICL_TYPE_POINTER, avc,
1526 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length),
1527 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1528 avc->m.Length = length;
1529 avc->m.Date = astat->ClientModTime;
1531 hset64(avc->m.DataVersion, astat->dataVersionHigh, astat->DataVersion);
1532 avc->m.Owner = astat->Owner;
1533 avc->m.Mode = astat->UnixModeBits;
1534 avc->m.Group = astat->Group;
1535 avc->m.LinkCount = astat->LinkCount;
1536 if (astat->FileType == File) {
1537 vSetType(avc, VREG);
1538 avc->m.Mode |= S_IFREG;
1540 else if (astat->FileType == Directory) {
1541 vSetType(avc, VDIR);
1542 avc->m.Mode |= S_IFDIR;
1544 else if (astat->FileType == SymbolicLink) {
1545 vSetType(avc, VLNK);
1546 avc->m.Mode |= S_IFLNK;
1547 if ((avc->m.Mode & 0111) == 0) avc->mvstat = 1;
1549 avc->anyAccess = astat->AnonymousAccess;
1551 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1553 * Caller has at least one bit not covered by anonymous, and
1554 * thus may have interesting rights.
1556 * HOWEVER, this is a really bad idea, because any access query
1557 * for bits which aren't covered by anonymous, on behalf of a user
1558 * who doesn't have any special rights, will result in an answer of
1559 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1560 * It's an especially bad idea under Ultrix, since (due to the lack of
1561 * a proper access() call) it must perform several afs_access() calls
1562 * in order to create magic mode bits that vary according to who makes
1563 * the call. In other words, _every_ stat() generates a test for
1566 #endif /* badidea */
1568 struct axscache *ac;
1569 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1570 ac->axess = astat->CallerAccess;
1571 else /* not found, add a new one if possible */
1572 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1575 #ifdef AFS_LINUX22_ENV
1576 vcache2inode(avc); /* Set the inode attr cache */
1582 afs_RemoteLookup(afid, areq, name, nfid, OutStatusp, CallBackp, serverp, tsyncp)
1583 register struct VenusFid *afid;
1584 struct vrequest *areq;
1586 struct VenusFid *nfid;
1587 struct AFSFetchStatus *OutStatusp;
1588 struct AFSCallBack *CallBackp;
1589 struct server **serverp;
1590 struct AFSVolSync *tsyncp;
1593 register struct vcache *tvc;
1596 register struct conn *tc;
1597 struct AFSFetchStatus OutDirStatus;
1600 if (!name) name = ""; /* XXX */
1602 tc = afs_Conn(afid, areq, SHARED_LOCK);
1604 if (serverp) *serverp = tc->srvr->server;
1606 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_XLOOKUP);
1608 code = RXAFS_Lookup(tc->id, (struct AFSFid *) &afid->Fid, name,
1609 (struct AFSFid *) &nfid->Fid,
1610 OutStatusp, &OutDirStatus, CallBackp, tsyncp);
1616 (afs_Analyze(tc, code, afid, areq,
1617 AFS_STATS_FS_RPCIDX_XLOOKUP,
1618 SHARED_LOCK, (struct cell *)0));
1628 * Given a file id and a vrequest structure, fetch the status
1629 * information associated with the file.
1633 * areq : Ptr to associated vrequest structure, specifying the
1634 * user whose authentication tokens will be used.
1635 * avc : caller may already have a vcache for this file, which is
1639 * The cache entry is returned with an increased vrefCount field.
1640 * The entry must be discarded by calling afs_PutVCache when you
1641 * are through using the pointer to the cache entry.
1643 * You should not hold any locks when calling this function, except
1644 * locks on other vcache entries. If you lock more than one vcache
1645 * entry simultaneously, you should lock them in this order:
1647 * 1. Lock all files first, then directories.
1648 * 2. Within a particular type, lock entries in Fid.Vnode order.
1650 * This locking hierarchy is convenient because it allows locking
1651 * of a parent dir cache entry, given a file (to check its access
1652 * control list). It also allows renames to be handled easily by
1653 * locking directories in a constant order.
1654 * NB. NewVCache -> FlushVCache presently (4/10/95) drops the xvcache lock.
1656 struct vcache *afs_GetVCache(afid, areq, cached, avc, locktype)
1657 register struct VenusFid *afid;
1658 struct vrequest *areq;
1661 struct vcache *avc; /* might have a vcache structure already, which must
1662 * already be held by the caller */
1665 afs_int32 code, i, newvcache=0;
1666 register struct vcache *tvc;
1670 AFS_STATCNT(afs_GetVCache);
1672 if (cached) *cached = 0; /* Init just in case */
1675 ObtainSharedLock(&afs_xvcache,5);
1677 tvc = afs_FindVCache(afid, 0, 0, &retry, DO_STATS | DO_VLRU );
1679 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1680 ReleaseSharedLock(&afs_xvcache);
1681 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1689 if (tvc->states & CStatd) {
1690 ReleaseSharedLock(&afs_xvcache);
1695 UpgradeSToWLock(&afs_xvcache,21);
1697 /* no cache entry, better grab one */
1698 tvc = afs_NewVCache(afid, (struct server *)0, 1, WRITE_LOCK);
1701 ConvertWToSLock(&afs_xvcache);
1702 afs_stats_cmperf.vcacheMisses++;
1705 ReleaseSharedLock(&afs_xvcache);
1707 ObtainWriteLock(&tvc->lock,54);
1709 if (tvc->states & CStatd) {
1710 #ifdef AFS_LINUX22_ENV
1713 ReleaseWriteLock(&tvc->lock);
1714 #ifdef AFS_DARWIN_ENV
1720 #if defined(AFS_OSF_ENV)
1721 if (afs_IsWired(tvc)) {
1722 ReleaseWriteLock(&tvc->lock);
1725 #endif /* AFS_OSF_ENV */
1727 ObtainWriteLock(&afs_xcbhash, 464);
1728 tvc->states &= ~CUnique;
1730 afs_DequeueCallback(tvc);
1731 ReleaseWriteLock(&afs_xcbhash);
1733 /* It is always appropriate to throw away all the access rights? */
1734 afs_FreeAllAxs(&(tvc->Access));
1735 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-volume info */
1737 if ((tvp->states & VForeign)) {
1738 if (newvcache) tvc->states |= CForeign;
1739 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
1740 && (tvp->rootUnique == afid->Fid.Unique)) {
1744 if (tvp->states & VRO) tvc->states |= CRO;
1745 if (tvp->states & VBackup) tvc->states |= CBackup;
1746 /* now copy ".." entry back out of volume structure, if necessary */
1747 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
1749 tvc->mvid = (struct VenusFid *)
1750 osi_AllocSmallSpace(sizeof(struct VenusFid));
1751 *tvc->mvid = tvp->dotdot;
1753 afs_PutVolume(tvp, READ_LOCK);
1757 afs_RemoveVCB(afid);
1759 struct AFSFetchStatus OutStatus;
1761 if (afs_DynrootNewVnode(tvc, &OutStatus)) {
1762 afs_ProcessFS(tvc, &OutStatus, areq);
1763 tvc->states |= CStatd | CUnique;
1766 code = afs_FetchStatus(tvc, afid, areq, &OutStatus);
1771 ReleaseWriteLock(&tvc->lock);
1773 ObtainReadLock(&afs_xvcache);
1775 ReleaseReadLock(&afs_xvcache);
1776 return (struct vcache *) 0;
1779 ReleaseWriteLock(&tvc->lock);
1780 #ifdef AFS_DARWIN_ENV
1789 struct vcache *afs_LookupVCache(struct VenusFid *afid, struct vrequest *areq,
1790 afs_int32 *cached, afs_int32 locktype,
1791 struct vcache *adp, char *aname)
1793 afs_int32 code, now, newvcache=0, hash;
1794 struct VenusFid nfid;
1795 register struct vcache *tvc;
1797 struct AFSFetchStatus OutStatus;
1798 struct AFSCallBack CallBack;
1799 struct AFSVolSync tsync;
1800 struct server *serverp = 0;
1804 AFS_STATCNT(afs_GetVCache);
1805 if (cached) *cached = 0; /* Init just in case */
1808 ObtainReadLock(&afs_xvcache);
1809 tvc = afs_FindVCache(afid, 0, 0, &retry, DO_STATS /* no vlru */);
1812 ReleaseReadLock(&afs_xvcache);
1814 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1815 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1819 ObtainReadLock(&tvc->lock);
1821 if (tvc->states & CStatd) {
1825 ReleaseReadLock(&tvc->lock);
1828 tvc->states &= ~CUnique;
1830 ReleaseReadLock(&tvc->lock);
1831 ObtainReadLock(&afs_xvcache);
1835 ReleaseReadLock(&afs_xvcache);
1837 /* lookup the file */
1840 origCBs = afs_allCBs; /* if anything changes, we don't have a cb */
1841 code = afs_RemoteLookup(&adp->fid, areq, aname, &nfid, &OutStatus, &CallBack,
1845 ObtainSharedLock(&afs_xvcache,6);
1846 tvc = afs_FindVCache(&nfid, 0, 0, &retry, DO_VLRU /* no xstats now*/);
1848 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1849 ReleaseSharedLock(&afs_xvcache);
1850 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1856 /* no cache entry, better grab one */
1857 UpgradeSToWLock(&afs_xvcache,22);
1858 tvc = afs_NewVCache(&nfid, (struct server *)0, 1, WRITE_LOCK);
1860 ConvertWToSLock(&afs_xvcache);
1863 ReleaseSharedLock(&afs_xvcache);
1864 ObtainWriteLock(&tvc->lock,55);
1866 /* It is always appropriate to throw away all the access rights? */
1867 afs_FreeAllAxs(&(tvc->Access));
1868 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-vol info */
1870 if ((tvp->states & VForeign)) {
1871 if (newvcache) tvc->states |= CForeign;
1872 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
1873 && (tvp->rootUnique == afid->Fid.Unique))
1876 if (tvp->states & VRO) tvc->states |= CRO;
1877 if (tvp->states & VBackup) tvc->states |= CBackup;
1878 /* now copy ".." entry back out of volume structure, if necessary */
1879 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
1881 tvc->mvid = (struct VenusFid *)
1882 osi_AllocSmallSpace(sizeof(struct VenusFid));
1883 *tvc->mvid = tvp->dotdot;
1888 ObtainWriteLock(&afs_xcbhash, 465);
1889 afs_DequeueCallback(tvc);
1890 tvc->states &= ~( CStatd | CUnique );
1891 ReleaseWriteLock(&afs_xcbhash);
1892 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
1893 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
1895 afs_PutVolume(tvp, READ_LOCK);
1896 ReleaseWriteLock(&tvc->lock);
1897 ObtainReadLock(&afs_xvcache);
1899 ReleaseReadLock(&afs_xvcache);
1900 return (struct vcache *) 0;
1903 ObtainWriteLock(&afs_xcbhash, 466);
1904 if (origCBs == afs_allCBs) {
1905 if (CallBack.ExpirationTime) {
1906 tvc->callback = serverp;
1907 tvc->cbExpires = CallBack.ExpirationTime+now;
1908 tvc->states |= CStatd | CUnique;
1909 tvc->states &= ~CBulkFetching;
1910 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvp);
1911 } else if (tvc->states & CRO) {
1912 /* adapt gives us an hour. */
1913 tvc->cbExpires = 3600+osi_Time(); /*XXX*/
1914 tvc->states |= CStatd | CUnique;
1915 tvc->states &= ~CBulkFetching;
1916 afs_QueueCallback(tvc, CBHash(3600), tvp);
1918 tvc->callback = (struct server *)0;
1919 afs_DequeueCallback(tvc);
1920 tvc->states &= ~(CStatd | CUnique);
1921 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
1922 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
1925 afs_DequeueCallback(tvc);
1926 tvc->states &= ~CStatd;
1927 tvc->states &= ~CUnique;
1928 tvc->callback = (struct server *)0;
1929 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
1930 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
1932 ReleaseWriteLock(&afs_xcbhash);
1934 afs_PutVolume(tvp, READ_LOCK);
1935 afs_ProcessFS(tvc, &OutStatus, areq);
1937 ReleaseWriteLock(&tvc->lock);
1938 #ifdef AFS_DARWIN_ENV
1945 struct vcache *afs_GetRootVCache(struct VenusFid *afid,
1946 struct vrequest *areq, afs_int32 *cached,
1947 struct volume *tvolp, afs_int32 locktype)
1949 afs_int32 code, i, newvcache = 0, haveStatus = 0;
1950 afs_int32 getNewFid = 0;
1952 struct VenusFid nfid;
1953 register struct vcache *tvc;
1954 struct server *serverp = 0;
1955 struct AFSFetchStatus OutStatus;
1956 struct AFSCallBack CallBack;
1957 struct AFSVolSync tsync;
1963 if (!tvolp->rootVnode || getNewFid) {
1964 struct VenusFid tfid;
1967 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
1968 origCBs = afs_allCBs; /* ignore InitCallBackState */
1969 code = afs_RemoteLookup(&tfid, areq, (char *)0, &nfid,
1970 &OutStatus, &CallBack, &serverp, &tsync);
1972 return (struct vcache *)0;
1974 /* ReleaseReadLock(&tvolp->lock); */
1975 ObtainWriteLock(&tvolp->lock,56);
1976 tvolp->rootVnode = afid->Fid.Vnode = nfid.Fid.Vnode;
1977 tvolp->rootUnique = afid->Fid.Unique = nfid.Fid.Unique;
1978 ReleaseWriteLock(&tvolp->lock);
1979 /* ObtainReadLock(&tvolp->lock);*/
1982 afid->Fid.Vnode = tvolp->rootVnode;
1983 afid->Fid.Unique = tvolp->rootUnique;
1986 ObtainSharedLock(&afs_xvcache,7);
1988 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
1989 if (!FidCmp(&(tvc->fid), afid)) {
1991 /* Grab this vnode, possibly reactivating from the free list */
1992 /* for the present (95.05.25) everything on the hash table is
1993 * definitively NOT in the free list -- at least until afs_reclaim
1994 * can be safely implemented */
1997 vg = vget(AFSTOV(tvc)); /* this bumps ref count */
2001 #endif /* AFS_OSF_ENV */
2006 if (!haveStatus && (!tvc || !(tvc->states & CStatd))) {
2007 /* Mount point no longer stat'd or unknown. FID may have changed. */
2012 tvc = (struct vcache*)0;
2014 ReleaseSharedLock(&afs_xvcache);
2019 UpgradeSToWLock(&afs_xvcache,23);
2020 /* no cache entry, better grab one */
2021 tvc = afs_NewVCache(afid, (struct server *)0, 1, WRITE_LOCK);
2023 afs_stats_cmperf.vcacheMisses++;
2026 if (cached) *cached = 1;
2027 afs_stats_cmperf.vcacheHits++;
2029 /* we already bumped the ref count in the for loop above */
2030 #else /* AFS_OSF_ENV */
2033 UpgradeSToWLock(&afs_xvcache,24);
2034 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2035 refpanic ("GRVC VLRU inconsistent0");
2037 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2038 refpanic ("GRVC VLRU inconsistent1");
2040 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2041 refpanic ("GRVC VLRU inconsistent2");
2043 QRemove(&tvc->vlruq); /* move to lruq head */
2044 QAdd(&VLRU, &tvc->vlruq);
2045 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2046 refpanic ("GRVC VLRU inconsistent3");
2048 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2049 refpanic ("GRVC VLRU inconsistent4");
2051 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2052 refpanic ("GRVC VLRU inconsistent5");
2057 ReleaseWriteLock(&afs_xvcache);
2059 if (tvc->states & CStatd) {
2063 ObtainReadLock(&tvc->lock);
2064 tvc->states &= ~CUnique;
2065 tvc->callback = (struct server *)0; /* redundant, perhaps */
2066 ReleaseReadLock(&tvc->lock);
2069 ObtainWriteLock(&tvc->lock,57);
2071 /* It is always appropriate to throw away all the access rights? */
2072 afs_FreeAllAxs(&(tvc->Access));
2074 if (newvcache) tvc->states |= CForeign;
2075 if (tvolp->states & VRO) tvc->states |= CRO;
2076 if (tvolp->states & VBackup) tvc->states |= CBackup;
2077 /* now copy ".." entry back out of volume structure, if necessary */
2078 if (newvcache && (tvolp->rootVnode == afid->Fid.Vnode)
2079 && (tvolp->rootUnique == afid->Fid.Unique)) {
2082 if (tvc->mvstat == 2 && tvolp->dotdot.Fid.Volume != 0) {
2084 tvc->mvid = (struct VenusFid *)osi_AllocSmallSpace(sizeof(struct VenusFid));
2085 *tvc->mvid = tvolp->dotdot;
2089 afs_RemoveVCB(afid);
2092 struct VenusFid tfid;
2095 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
2096 origCBs = afs_allCBs; /* ignore InitCallBackState */
2097 code = afs_RemoteLookup(&tfid, areq, (char *)0, &nfid, &OutStatus,
2098 &CallBack, &serverp, &tsync);
2102 ObtainWriteLock(&afs_xcbhash, 467);
2103 afs_DequeueCallback(tvc);
2104 tvc->callback = (struct server *)0;
2105 tvc->states &= ~(CStatd|CUnique);
2106 ReleaseWriteLock(&afs_xcbhash);
2107 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2108 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2109 ReleaseWriteLock(&tvc->lock);
2110 ObtainReadLock(&afs_xvcache);
2112 ReleaseReadLock(&afs_xvcache);
2113 return (struct vcache *) 0;
2116 ObtainWriteLock(&afs_xcbhash, 468);
2117 if (origCBs == afs_allCBs) {
2118 tvc->states |= CTruth;
2119 tvc->callback = serverp;
2120 if (CallBack.ExpirationTime != 0) {
2121 tvc->cbExpires = CallBack.ExpirationTime+start;
2122 tvc->states |= CStatd;
2123 tvc->states &= ~CBulkFetching;
2124 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvolp);
2125 } else if (tvc->states & CRO) {
2126 /* adapt gives us an hour. */
2127 tvc->cbExpires = 3600+osi_Time(); /*XXX*/
2128 tvc->states |= CStatd;
2129 tvc->states &= ~CBulkFetching;
2130 afs_QueueCallback(tvc, CBHash(3600), tvolp);
2133 afs_DequeueCallback(tvc);
2134 tvc->callback = (struct server *)0;
2135 tvc->states &= ~(CStatd | CUnique);
2136 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2137 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2139 ReleaseWriteLock(&afs_xcbhash);
2140 afs_ProcessFS(tvc, &OutStatus, areq);
2142 ReleaseWriteLock(&tvc->lock);
2149 * must be called with avc write-locked
2150 * don't absolutely have to invalidate the hint unless the dv has
2151 * changed, but be sure to get it right else there will be consistency bugs.
2153 afs_int32 afs_FetchStatus(struct vcache *avc, struct VenusFid *afid,
2154 struct vrequest *areq, struct AFSFetchStatus *Outsp)
2158 register struct conn *tc;
2159 struct AFSCallBack CallBack;
2160 struct AFSVolSync tsync;
2161 struct volume* volp;
2165 tc = afs_Conn(afid, areq, SHARED_LOCK);
2166 avc->quick.stamp = 0; avc->h1.dchint = NULL; /* invalidate hints */
2168 avc->callback = tc->srvr->server;
2170 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_FETCHSTATUS);
2172 code = RXAFS_FetchStatus(tc->id,
2173 (struct AFSFid *) &afid->Fid,
2174 Outsp, &CallBack, &tsync);
2182 (afs_Analyze(tc, code, afid, areq,
2183 AFS_STATS_FS_RPCIDX_FETCHSTATUS,
2184 SHARED_LOCK, (struct cell *)0));
2187 afs_ProcessFS(avc, Outsp, areq);
2188 volp = afs_GetVolume(afid, areq, READ_LOCK);
2189 ObtainWriteLock(&afs_xcbhash, 469);
2190 avc->states |= CTruth;
2191 if (avc->callback /* check for race */) {
2192 if (CallBack.ExpirationTime != 0) {
2193 avc->cbExpires = CallBack.ExpirationTime+start;
2194 avc->states |= CStatd;
2195 avc->states &= ~CBulkFetching;
2196 afs_QueueCallback(avc, CBHash(CallBack.ExpirationTime), volp);
2198 else if (avc->states & CRO)
2199 { /* ordinary callback on a read-only volume -- AFS 3.2 style */
2200 avc->cbExpires = 3600+start;
2201 avc->states |= CStatd;
2202 avc->states &= ~CBulkFetching;
2203 afs_QueueCallback(avc, CBHash(3600), volp);
2206 afs_DequeueCallback(avc);
2207 avc->callback = (struct server *)0;
2208 avc->states &= ~(CStatd|CUnique);
2209 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
2210 osi_dnlc_purgedp (avc); /* if it (could be) a directory */
2214 afs_DequeueCallback(avc);
2215 avc->callback = (struct server *)0;
2216 avc->states &= ~(CStatd|CUnique);
2217 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
2218 osi_dnlc_purgedp (avc); /* if it (could be) a directory */
2220 ReleaseWriteLock(&afs_xcbhash);
2222 afs_PutVolume(volp, READ_LOCK);
2224 else { /* used to undo the local callback, but that's too extreme.
2225 * There are plenty of good reasons that fetchstatus might return
2226 * an error, such as EPERM. If we have the vnode cached, statd,
2227 * with callback, might as well keep track of the fact that we
2228 * don't have access...
2230 if (code == EPERM || code == EACCES) {
2231 struct axscache *ac;
2232 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
2234 else /* not found, add a new one if possible */
2235 afs_AddAxs(avc->Access, areq->uid, 0);
2246 * Stuff some information into the vcache for the given file.
2249 * afid : File in question.
2250 * OutStatus : Fetch status on the file.
2251 * CallBack : Callback info.
2252 * tc : RPC connection involved.
2253 * areq : vrequest involved.
2256 * Nothing interesting.
2259 afs_StuffVcache(afid, OutStatus, CallBack, tc, areq)
2260 register struct VenusFid *afid;
2261 struct AFSFetchStatus *OutStatus;
2262 struct AFSCallBack *CallBack;
2263 register struct conn *tc;
2264 struct vrequest *areq;
2266 { /*afs_StuffVcache*/
2268 register afs_int32 code, i, newvcache=0;
2269 register struct vcache *tvc;
2270 struct AFSVolSync tsync;
2272 struct axscache *ac;
2275 AFS_STATCNT(afs_StuffVcache);
2276 #ifdef IFS_VCACHECOUNT
2281 ObtainSharedLock(&afs_xvcache,8);
2283 tvc = afs_FindVCache(afid, 0, 0, &retry, DO_VLRU /* no stats */);
2285 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2286 ReleaseSharedLock(&afs_xvcache);
2287 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2293 /* no cache entry, better grab one */
2294 UpgradeSToWLock(&afs_xvcache,25);
2295 tvc = afs_NewVCache(afid, (struct server *)0, 1, WRITE_LOCK);
2297 ConvertWToSLock(&afs_xvcache);
2300 ReleaseSharedLock(&afs_xvcache);
2301 ObtainWriteLock(&tvc->lock,58);
2303 tvc->states &= ~CStatd;
2304 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2305 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2307 /* Is it always appropriate to throw away all the access rights? */
2308 afs_FreeAllAxs(&(tvc->Access));
2310 /*Copy useful per-volume info*/
2311 tvp = afs_GetVolume(afid, areq, READ_LOCK);
2313 if (newvcache && (tvp->states & VForeign)) tvc->states |= CForeign;
2314 if (tvp->states & VRO) tvc->states |= CRO;
2315 if (tvp->states & VBackup) tvc->states |= CBackup;
2317 * Now, copy ".." entry back out of volume structure, if
2320 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
2321 if (!tvc->mvid) tvc->mvid =
2322 (struct VenusFid *) osi_AllocSmallSpace(sizeof(struct VenusFid));
2323 *tvc->mvid = tvp->dotdot;
2326 /* store the stat on the file */
2327 afs_RemoveVCB(afid);
2328 afs_ProcessFS(tvc, OutStatus, areq);
2329 tvc->callback = tc->srvr->server;
2331 /* we use osi_Time twice below. Ideally, we would use the time at which
2332 * the FetchStatus call began, instead, but we don't have it here. So we
2333 * make do with "now". In the CRO case, it doesn't really matter. In
2334 * the other case, we hope that the difference between "now" and when the
2335 * call actually began execution on the server won't be larger than the
2336 * padding which the server keeps. Subtract 1 second anyway, to be on
2337 * the safe side. Can't subtract more because we don't know how big
2338 * ExpirationTime is. Possible consistency problems may arise if the call
2339 * timeout period becomes longer than the server's expiration padding. */
2340 ObtainWriteLock(&afs_xcbhash, 470);
2341 if (CallBack->ExpirationTime != 0) {
2342 tvc->cbExpires = CallBack->ExpirationTime+osi_Time()-1;
2343 tvc->states |= CStatd;
2344 tvc->states &= ~CBulkFetching;
2345 afs_QueueCallback(tvc, CBHash(CallBack->ExpirationTime), tvp);
2347 else if (tvc->states & CRO) {
2348 /* old-fashioned AFS 3.2 style */
2349 tvc->cbExpires = 3600+osi_Time(); /*XXX*/
2350 tvc->states |= CStatd;
2351 tvc->states &= ~CBulkFetching;
2352 afs_QueueCallback(tvc, CBHash(3600), tvp);
2355 afs_DequeueCallback(tvc);
2356 tvc->callback = (struct server *)0;
2357 tvc->states &= ~(CStatd|CUnique);
2358 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2359 osi_dnlc_purgedp (tvc); /* if it (could be) a directory */
2361 ReleaseWriteLock(&afs_xcbhash);
2363 afs_PutVolume(tvp, READ_LOCK);
2365 /* look in per-pag cache */
2366 if (tvc->Access && (ac = afs_FindAxs(tvc->Access, areq->uid)))
2367 ac->axess = OutStatus->CallerAccess; /* substitute pags */
2368 else /* not found, add a new one if possible */
2369 afs_AddAxs(tvc->Access, areq->uid, OutStatus->CallerAccess);
2371 ReleaseWriteLock(&tvc->lock);
2372 afs_Trace4(afs_iclSetp, CM_TRACE_STUFFVCACHE, ICL_TYPE_POINTER, tvc,
2373 ICL_TYPE_POINTER, tvc->callback, ICL_TYPE_INT32, tvc->cbExpires,
2374 ICL_TYPE_INT32, tvc->cbExpires-osi_Time());
2376 * Release ref count... hope this guy stays around...
2378 afs_PutVCache(tvc, WRITE_LOCK);
2379 } /*afs_StuffVcache*/
2386 * Decrements the reference count on a cache entry.
2389 * avc : Pointer to the cache entry to decrement.
2392 * Nothing interesting.
2395 afs_PutVCache(avc, locktype)
2396 register struct vcache *avc;
2400 AFS_STATCNT(afs_PutVCache);
2402 * Can we use a read lock here?
2404 ObtainReadLock(&afs_xvcache);
2406 ReleaseReadLock(&afs_xvcache);
2413 * Find a vcache entry given a fid.
2416 * afid : Pointer to the fid whose cache entry we desire.
2417 * retry: (SGI-specific) tell the caller to drop the lock on xvcache,
2418 * unlock the vnode, and try again.
2419 * flags: bit 1 to specify whether to compute hit statistics. Not
2420 * set if FindVCache is called as part of internal bookkeeping.
2423 * Must be called with the afs_xvcache lock at least held at
2424 * the read level. In order to do the VLRU adjustment, the xvcache lock
2425 * must be shared-- we upgrade it here.
2428 struct vcache *afs_FindVCache(struct VenusFid *afid, afs_int32 lockit,
2429 afs_int32 locktype, afs_int32 *retry, afs_int32 flag)
2432 register struct vcache *tvc;
2435 AFS_STATCNT(afs_FindVCache);
2438 for(tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2439 if (FidMatches(afid, tvc)) {
2441 /* Grab this vnode, possibly reactivating from the free list */
2444 vg = vget(AFSTOV(tvc));
2448 #endif /* AFS_OSF_ENV */
2453 /* should I have a read lock on the vnode here? */
2455 if (retry) *retry = 0;
2456 #if !defined(AFS_OSF_ENV)
2457 osi_vnhold(tvc, retry); /* already held, above */
2458 if (retry && *retry)
2462 * only move to front of vlru if we have proper vcache locking)
2464 if (flag & DO_VLRU) {
2465 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2466 refpanic ("FindVC VLRU inconsistent1");
2468 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2469 refpanic ("FindVC VLRU inconsistent1");
2471 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2472 refpanic ("FindVC VLRU inconsistent2");
2474 UpgradeSToWLock(&afs_xvcache,26);
2475 QRemove(&tvc->vlruq);
2476 QAdd(&VLRU, &tvc->vlruq);
2477 ConvertWToSLock(&afs_xvcache);
2478 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2479 refpanic ("FindVC VLRU inconsistent1");
2481 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2482 refpanic ("FindVC VLRU inconsistent2");
2484 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2485 refpanic ("FindVC VLRU inconsistent3");
2491 if (flag & DO_STATS) {
2492 if (tvc) afs_stats_cmperf.vcacheHits++;
2493 else afs_stats_cmperf.vcacheMisses++;
2494 if (afid->Cell == LOCALCELL)
2495 afs_stats_cmperf.vlocalAccesses++;
2497 afs_stats_cmperf.vremoteAccesses++;
2500 #ifdef AFS_LINUX22_ENV
2501 if (tvc && (tvc->states & CStatd))
2502 vcache2inode(tvc); /* mainly to reset i_nlink */
2504 #ifdef AFS_DARWIN_ENV
2509 } /*afs_FindVCache*/
2515 * Find a vcache entry given a fid. Does a wildcard match on what we
2516 * have for the fid. If more than one entry, don't return anything.
2519 * avcp : Fill in pointer if we found one and only one.
2520 * afid : Pointer to the fid whose cache entry we desire.
2521 * retry: (SGI-specific) tell the caller to drop the lock on xvcache,
2522 * unlock the vnode, and try again.
2523 * flags: bit 1 to specify whether to compute hit statistics. Not
2524 * set if FindVCache is called as part of internal bookkeeping.
2527 * Must be called with the afs_xvcache lock at least held at
2528 * the read level. In order to do the VLRU adjustment, the xvcache lock
2529 * must be shared-- we upgrade it here.
2532 * number of matches found.
2535 int afs_duplicate_nfs_fids=0;
2537 afs_int32 afs_NFSFindVCache(avcp, afid, lockit)
2538 struct vcache **avcp;
2539 struct VenusFid *afid;
2541 { /*afs_FindVCache*/
2543 register struct vcache *tvc;
2545 afs_int32 retry = 0;
2546 afs_int32 count = 0;
2547 struct vcache *found_tvc = NULL;
2549 AFS_STATCNT(afs_FindVCache);
2553 ObtainSharedLock(&afs_xvcache,331);
2556 for(tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2557 /* Match only on what we have.... */
2558 if (((tvc->fid.Fid.Vnode & 0xffff) == afid->Fid.Vnode)
2559 && (tvc->fid.Fid.Volume == afid->Fid.Volume)
2560 && ((tvc->fid.Fid.Unique & 0xffffff) == afid->Fid.Unique)
2561 && (tvc->fid.Cell == afid->Cell)) {
2563 /* Grab this vnode, possibly reactivating from the free list */
2566 vg = vget(AFSTOV(tvc));
2569 /* This vnode no longer exists. */
2572 #endif /* AFS_OSF_ENV */
2577 /* Drop our reference counts. */
2579 vrele(AFSTOV(found_tvc));
2581 afs_duplicate_nfs_fids++;
2582 ReleaseSharedLock(&afs_xvcache);
2590 /* should I have a read lock on the vnode here? */
2592 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2593 osi_vnhold(tvc, &retry);
2596 found_tvc = (struct vcache*)0;
2597 ReleaseSharedLock(&afs_xvcache);
2598 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2602 #if !defined(AFS_OSF_ENV)
2603 osi_vnhold(tvc, (int*)0); /* already held, above */
2607 * We obtained the xvcache lock above.
2609 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2610 refpanic ("FindVC VLRU inconsistent1");
2612 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2613 refpanic ("FindVC VLRU inconsistent1");
2615 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2616 refpanic ("FindVC VLRU inconsistent2");
2618 UpgradeSToWLock(&afs_xvcache,568);
2619 QRemove(&tvc->vlruq);
2620 QAdd(&VLRU, &tvc->vlruq);
2621 ConvertWToSLock(&afs_xvcache);
2622 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2623 refpanic ("FindVC VLRU inconsistent1");
2625 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2626 refpanic ("FindVC VLRU inconsistent2");
2628 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2629 refpanic ("FindVC VLRU inconsistent3");
2634 if (tvc) afs_stats_cmperf.vcacheHits++;
2635 else afs_stats_cmperf.vcacheMisses++;
2636 if (afid->Cell == LOCALCELL)
2637 afs_stats_cmperf.vlocalAccesses++;
2639 afs_stats_cmperf.vremoteAccesses++;
2641 *avcp = tvc; /* May be null */
2643 ReleaseSharedLock(&afs_xvcache);
2644 return (tvc ? 1 : 0);
2646 } /*afs_NFSFindVCache*/
2654 * Initialize vcache related variables
2656 void afs_vcacheInit(int astatSize)
2658 register struct vcache *tvp;
2660 #if defined(AFS_OSF_ENV)
2661 if (!afs_maxvcount) {
2662 #if defined(AFS_OSF30_ENV)
2663 afs_maxvcount = max_vnodes/2; /* limit ourselves to half the total */
2665 afs_maxvcount = nvnode/2; /* limit ourselves to half the total */
2667 if (astatSize < afs_maxvcount) {
2668 afs_maxvcount = astatSize;
2671 #else /* AFS_OSF_ENV */
2672 freeVCList = (struct vcache *)0;
2675 RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
2676 LOCK_INIT(&afs_xvcb, "afs_xvcb");
2678 #if !defined(AFS_OSF_ENV)
2679 /* Allocate and thread the struct vcache entries */
2680 tvp = (struct vcache *) afs_osi_Alloc(astatSize * sizeof(struct vcache));
2681 memset((char *)tvp, 0, sizeof(struct vcache)*astatSize);
2683 Initial_freeVCList = tvp;
2684 freeVCList = &(tvp[0]);
2685 for(i=0; i < astatSize-1; i++) {
2686 tvp[i].nextfree = &(tvp[i+1]);
2688 tvp[astatSize-1].nextfree = (struct vcache *) 0;
2689 #ifdef AFS_AIX32_ENV
2690 pin((char *)tvp, astatSize * sizeof(struct vcache)); /* XXX */
2695 #if defined(AFS_SGI_ENV)
2696 for(i=0; i < astatSize; i++) {
2697 char name[METER_NAMSZ];
2698 struct vcache *tvc = &tvp[i];
2700 tvc->v.v_number = ++afsvnumbers;
2701 tvc->vc_rwlockid = OSI_NO_LOCKID;
2702 initnsema(&tvc->vc_rwlock, 1, makesname(name, "vrw", tvc->v.v_number));
2703 #ifndef AFS_SGI53_ENV
2704 initnsema(&tvc->v.v_sync, 0, makesname(name, "vsy", tvc->v.v_number));
2706 #ifndef AFS_SGI62_ENV
2707 initnlock(&tvc->v.v_lock, makesname(name, "vlk", tvc->v.v_number));
2708 #endif /* AFS_SGI62_ENV */
2721 void shutdown_vcache(void)
2724 struct afs_cbr *tsp, *nsp;
2726 * XXX We may potentially miss some of the vcaches because if when there're no
2727 * free vcache entries and all the vcache entries are active ones then we allocate
2728 * an additional one - admittedly we almost never had that occur.
2730 #if !defined(AFS_OSF_ENV)
2731 afs_osi_Free(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
2733 #ifdef AFS_AIX32_ENV
2734 unpin(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
2738 register struct afs_q *tq, *uq;
2739 register struct vcache *tvc;
2740 for (tq = VLRU.prev; tq != &VLRU; tq = uq) {
2744 osi_FreeSmallSpace(tvc->mvid);
2745 tvc->mvid = (struct VenusFid*)0;
2748 aix_gnode_rele(AFSTOV(tvc));
2750 if (tvc->linkData) {
2751 afs_osi_Free(tvc->linkData, strlen(tvc->linkData)+1);
2756 * Also free the remaining ones in the Cache
2758 for (i=0; i < VCSIZE; i++) {
2759 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2761 osi_FreeSmallSpace(tvc->mvid);
2762 tvc->mvid = (struct VenusFid*)0;
2766 afs_osi_Free(tvc->v.v_gnode, sizeof(struct gnode));
2767 #ifdef AFS_AIX32_ENV
2770 vms_delete(tvc->segid);
2772 tvc->segid = tvc->vmh = NULL;
2773 if (VREFCOUNT(tvc)) osi_Panic("flushVcache: vm race");
2781 #if defined(AFS_SUN5_ENV)
2787 if (tvc->linkData) {
2788 afs_osi_Free(tvc->linkData, strlen(tvc->linkData)+1);
2792 afs_FreeAllAxs(&(tvc->Access));
2798 * Free any leftover callback queue
2800 for (tsp = afs_cbrSpace; tsp; tsp = nsp ) {
2802 afs_osi_Free((char *)tsp, AFS_NCBRS * sizeof(struct afs_cbr));
2806 #if !defined(AFS_OSF_ENV)
2807 freeVCList = Initial_freeVCList = 0;
2809 RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
2810 LOCK_INIT(&afs_xvcb, "afs_xvcb");