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"
44 #include "afs/sysincludes.h" /*Standard vendor system headers */
45 #include "afsincludes.h" /*AFS-based standard headers */
46 #include "afs/afs_stats.h"
47 #include "afs/afs_cbqueue.h"
48 #include "afs/afs_osidnlc.h"
51 afs_int32 afs_maxvcount = 0; /* max number of vcache entries */
52 afs_int32 afs_vcount = 0; /* number of vcache in use now */
53 #endif /* AFS_OSF_ENV */
61 #endif /* AFS_SGI64_ENV */
63 /* Exported variables */
64 afs_rwlock_t afs_xvcache; /*Lock: alloc new stat cache entries */
65 afs_lock_t afs_xvcb; /*Lock: fids on which there are callbacks */
66 struct vcache *freeVCList; /*Free list for stat cache entries */
67 struct vcache *Initial_freeVCList; /*Initial list for above */
68 struct afs_q VLRU; /*vcache LRU */
69 afs_int32 vcachegen = 0;
70 unsigned int afs_paniconwarn = 0;
71 struct vcache *afs_vhashT[VCSIZE];
72 static struct afs_cbr *afs_cbrHashT[CBRSIZE];
73 afs_int32 afs_bulkStatsLost;
74 int afs_norefpanic = 0;
76 /* Forward declarations */
77 static afs_int32 afs_QueueVCB(struct vcache *avc);
82 * Generate an index into the hash table for a given Fid.
85 afs_HashCBRFid(struct AFSFid *fid)
87 return (fid->Volume + fid->Vnode + fid->Unique) % CBRSIZE;
93 * Insert a CBR entry into the hash table.
94 * Must be called with afs_xvcb held.
97 afs_InsertHashCBR(struct afs_cbr *cbr)
99 int slot = afs_HashCBRFid(&cbr->fid);
101 cbr->hash_next = afs_cbrHashT[slot];
102 if (afs_cbrHashT[slot])
103 afs_cbrHashT[slot]->hash_pprev = &cbr->hash_next;
105 cbr->hash_pprev = &afs_cbrHashT[slot];
106 afs_cbrHashT[slot] = cbr;
113 * Flush the given vcache entry.
116 * avc : Pointer to vcache entry to flush.
117 * slept : Pointer to int to set 1 if we sleep/drop locks, 0 if we don't.
120 * afs_xvcache lock must be held for writing upon entry to
121 * prevent people from changing the vrefCount field, and to
122 * protect the lruq and hnext fields.
123 * LOCK: afs_FlushVCache afs_xvcache W
124 * REFCNT: vcache ref count must be zero on entry except for osf1
125 * RACE: lock is dropped and reobtained, permitting race in caller
129 afs_FlushVCache(struct vcache *avc, int *slept)
130 { /*afs_FlushVCache */
132 register afs_int32 i, code;
133 register struct vcache **uvc, *wvc;
136 AFS_STATCNT(afs_FlushVCache);
137 afs_Trace2(afs_iclSetp, CM_TRACE_FLUSHV, ICL_TYPE_POINTER, avc,
138 ICL_TYPE_INT32, avc->states);
141 VN_LOCK(AFSTOV(avc));
145 code = osi_VM_FlushVCache(avc, slept);
149 if (avc->states & CVFlushed) {
153 if (avc->nextfree || !avc->vlruq.prev || !avc->vlruq.next) { /* qv afs.h */
154 refpanic("LRU vs. Free inconsistency");
156 avc->states |= CVFlushed;
157 /* pull the entry out of the lruq and put it on the free list */
158 QRemove(&avc->vlruq);
159 avc->vlruq.prev = avc->vlruq.next = (struct afs_q *)0;
161 /* keep track of # of files that we bulk stat'd, but never used
162 * before they got recycled.
164 if (avc->states & CBulkStat)
167 /* remove entry from the hash chain */
168 i = VCHash(&avc->fid);
169 uvc = &afs_vhashT[i];
170 for (wvc = *uvc; wvc; uvc = &wvc->hnext, wvc = *uvc) {
173 avc->hnext = (struct vcache *)NULL;
178 osi_Panic("flushvcache"); /* not in correct hash bucket */
180 osi_FreeSmallSpace(avc->mvid);
181 avc->mvid = (struct VenusFid *)0;
183 afs_osi_Free(avc->linkData, strlen(avc->linkData) + 1);
184 avc->linkData = NULL;
186 #if defined(AFS_XBSD_ENV)
187 /* OK, there are no internal vrefCounts, so there shouldn't
188 * be any more refs here. */
190 avc->v->v_data = NULL; /* remove from vnode */
191 avc->v = NULL; /* also drop the ptr to vnode */
194 afs_FreeAllAxs(&(avc->Access));
196 /* we can't really give back callbacks on RO files, since the
197 * server only tracks them on a per-volume basis, and we don't
198 * know whether we still have some other files from the same
200 if ((avc->states & CRO) == 0 && avc->callback) {
203 ObtainWriteLock(&afs_xcbhash, 460);
204 afs_DequeueCallback(avc); /* remove it from queued callbacks list */
205 avc->states &= ~(CStatd | CUnique);
206 ReleaseWriteLock(&afs_xcbhash);
207 afs_symhint_inval(avc);
208 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
209 osi_dnlc_purgedp(avc); /* if it (could be) a directory */
211 osi_dnlc_purgevp(avc);
214 * Next, keep track of which vnodes we've deleted for create's
215 * optimistic synchronization algorithm
218 if (avc->fid.Fid.Vnode & 1)
223 #if !defined(AFS_OSF_ENV)
224 /* put the entry in the free list */
225 avc->nextfree = freeVCList;
227 if (avc->vlruq.prev || avc->vlruq.next) {
228 refpanic("LRU vs. Free inconsistency");
231 /* This should put it back on the vnode free list since usecount is 1 */
234 if (VREFCOUNT(avc) > 0) {
235 VN_UNLOCK(AFSTOV(avc));
236 AFS_RELE(AFSTOV(avc));
238 if (afs_norefpanic) {
239 printf("flush vc refcnt < 1");
241 (void)vgone(avc, VX_NOSLEEP, NULL);
243 VN_UNLOCK(AFSTOV(avc));
245 osi_Panic("flush vc refcnt < 1");
247 #endif /* AFS_OSF_ENV */
248 avc->states |= CVFlushed;
253 VN_UNLOCK(AFSTOV(avc));
257 } /*afs_FlushVCache */
263 * The core of the inactive vnode op for all but IRIX.
266 afs_InactiveVCache(struct vcache *avc, struct AFS_UCRED *acred)
268 AFS_STATCNT(afs_inactive);
269 if (avc->states & CDirty) {
270 /* we can't keep trying to push back dirty data forever. Give up. */
271 afs_InvalidateAllSegments(avc); /* turns off dirty bit */
273 avc->states &= ~CMAPPED; /* mainly used by SunOS 4.0.x */
274 avc->states &= ~CDirty; /* Turn it off */
275 if (avc->states & CUnlinked) {
276 if (CheckLock(&afs_xvcache) || CheckLock(&afs_xdcache)) {
277 avc->states |= CUnlinkedDel;
280 afs_remunlink(avc, 1); /* ignore any return code */
289 * Description: allocate a callback return structure from the
290 * free list and return it.
292 * Env: The alloc and free routines are both called with the afs_xvcb lock
293 * held, so we don't have to worry about blocking in osi_Alloc.
295 static struct afs_cbr *afs_cbrSpace = 0;
299 register struct afs_cbr *tsp;
302 while (!afs_cbrSpace) {
303 if (afs_stats_cmperf.CallBackAlloced >= 2) {
304 /* don't allocate more than 2 * AFS_NCBRS for now */
306 afs_stats_cmperf.CallBackFlushes++;
310 (struct afs_cbr *)afs_osi_Alloc(AFS_NCBRS *
311 sizeof(struct afs_cbr));
312 for (i = 0; i < AFS_NCBRS - 1; i++) {
313 tsp[i].next = &tsp[i + 1];
315 tsp[AFS_NCBRS - 1].next = 0;
317 afs_stats_cmperf.CallBackAlloced++;
321 afs_cbrSpace = tsp->next;
328 * Description: free a callback return structure, removing it from all lists.
331 * asp -- the address of the structure to free.
333 * Environment: the xvcb lock is held over these calls.
336 afs_FreeCBR(register struct afs_cbr *asp)
338 *(asp->pprev) = asp->next;
340 asp->next->pprev = asp->pprev;
342 *(asp->hash_pprev) = asp->hash_next;
344 asp->hash_next->hash_pprev = asp->hash_pprev;
346 asp->next = afs_cbrSpace;
354 * Description: flush all queued callbacks to all servers.
358 * Environment: holds xvcb lock over RPC to guard against race conditions
359 * when a new callback is granted for the same file later on.
362 afs_FlushVCBs(afs_int32 lockit)
364 struct AFSFid *tfids;
365 struct AFSCallBack callBacks[1];
366 struct AFSCBFids fidArray;
367 struct AFSCBs cbArray;
369 struct afs_cbr *tcbrp;
373 struct vrequest treq;
375 int safety1, safety2, safety3;
377 if ((code = afs_InitReq(&treq, afs_osi_credp)))
379 treq.flags |= O_NONBLOCK;
380 tfids = afs_osi_Alloc(sizeof(struct AFSFid) * AFS_MAXCBRSCALL);
383 MObtainWriteLock(&afs_xvcb, 273);
384 ObtainReadLock(&afs_xserver);
385 for (i = 0; i < NSERVERS; i++) {
386 for (safety1 = 0, tsp = afs_servers[i];
387 tsp && safety1 < afs_totalServers + 10;
388 tsp = tsp->next, safety1++) {
390 if (tsp->cbrs == (struct afs_cbr *)0)
393 /* otherwise, grab a block of AFS_MAXCBRSCALL from the list
394 * and make an RPC, over and over again.
396 tcount = 0; /* number found so far */
397 for (safety2 = 0; safety2 < afs_cacheStats; safety2++) {
398 if (tcount >= AFS_MAXCBRSCALL || !tsp->cbrs) {
399 /* if buffer is full, or we've queued all we're going
400 * to from this server, we should flush out the
403 fidArray.AFSCBFids_len = tcount;
404 fidArray.AFSCBFids_val = (struct AFSFid *)tfids;
405 cbArray.AFSCBs_len = 1;
406 cbArray.AFSCBs_val = callBacks;
407 memset(&callBacks[0], 0, sizeof(callBacks[0]));
408 callBacks[0].CallBackType = CB_EXCLUSIVE;
409 for (safety3 = 0; safety3 < MAXHOSTS * 2; safety3++) {
410 tc = afs_ConnByHost(tsp, tsp->cell->fsport,
411 tsp->cell->cellNum, &treq, 0,
415 (AFS_STATS_FS_RPCIDX_GIVEUPCALLBACKS);
418 RXAFS_GiveUpCallBacks(tc->id, &fidArray,
426 AFS_STATS_FS_RPCIDX_GIVEUPCALLBACKS, SHARED_LOCK,
431 /* ignore return code, since callbacks may have
432 * been returned anyway, we shouldn't leave them
433 * around to be returned again.
435 * Next, see if we are done with this server, and if so,
436 * break to deal with the next one.
442 /* if to flush full buffer */
443 /* if we make it here, we have an entry at the head of cbrs,
444 * which we should copy to the file ID array and then free.
447 tfids[tcount++] = tcbrp->fid;
449 /* Freeing the CBR will unlink it from the server's CBR list */
451 } /* while loop for this one server */
452 if (safety2 > afs_cacheStats) {
453 afs_warn("possible internal error afs_flushVCBs (%d)\n",
456 } /* for loop for this hash chain */
457 } /* loop through all hash chains */
458 if (safety1 > afs_totalServers + 2) {
460 ("AFS internal error (afs_flushVCBs) (%d > %d), continuing...\n",
461 safety1, afs_totalServers + 2);
463 osi_Panic("afs_flushVCBS safety1");
466 ReleaseReadLock(&afs_xserver);
468 MReleaseWriteLock(&afs_xvcb);
469 afs_osi_Free(tfids, sizeof(struct AFSFid) * AFS_MAXCBRSCALL);
477 * Queue a callback on the given fid.
483 * Locks the xvcb lock.
484 * Called when the xvcache lock is already held.
488 afs_QueueVCB(struct vcache *avc)
491 struct afs_cbr *tcbp;
493 AFS_STATCNT(afs_QueueVCB);
494 /* The callback is really just a struct server ptr. */
495 tsp = (struct server *)(avc->callback);
497 /* we now have a pointer to the server, so we just allocate
498 * a queue entry and queue it.
500 MObtainWriteLock(&afs_xvcb, 274);
501 tcbp = afs_AllocCBR();
502 tcbp->fid = avc->fid.Fid;
504 tcbp->next = tsp->cbrs;
506 tsp->cbrs->pprev = &tcbp->next;
509 tcbp->pprev = &tsp->cbrs;
511 afs_InsertHashCBR(tcbp);
513 /* now release locks and return */
514 MReleaseWriteLock(&afs_xvcb);
523 * Remove a queued callback for a given Fid.
526 * afid: The fid we want cleansed of queued callbacks.
529 * Locks xvcb and xserver locks.
530 * Typically called with xdcache, xvcache and/or individual vcache
535 afs_RemoveVCB(struct VenusFid *afid)
538 struct afs_cbr *cbr, *ncbr;
540 AFS_STATCNT(afs_RemoveVCB);
541 MObtainWriteLock(&afs_xvcb, 275);
543 slot = afs_HashCBRFid(&afid->Fid);
544 ncbr = afs_cbrHashT[slot];
548 ncbr = cbr->hash_next;
550 if (afid->Fid.Volume == cbr->fid.Volume &&
551 afid->Fid.Vnode == cbr->fid.Vnode &&
552 afid->Fid.Unique == cbr->fid.Unique) {
557 MReleaseWriteLock(&afs_xvcb);
564 * This routine is responsible for allocating a new cache entry
565 * from the free list. It formats the cache entry and inserts it
566 * into the appropriate hash tables. It must be called with
567 * afs_xvcache write-locked so as to prevent several processes from
568 * trying to create a new cache entry simultaneously.
571 * afid : The file id of the file whose cache entry is being
574 /* LOCK: afs_NewVCache afs_xvcache W */
576 afs_NewVCache(struct VenusFid *afid, struct server *serverp)
580 afs_int32 anumber = VCACHE_FREE;
582 struct gnode *gnodepnt;
585 struct vm_info *vm_info_ptr;
586 #endif /* AFS_MACH_ENV */
589 #endif /* AFS_OSF_ENV */
590 struct afs_q *tq, *uq;
593 AFS_STATCNT(afs_NewVCache);
596 if (afs_vcount >= afs_maxvcount) {
599 * If we are using > 33 % of the total system vnodes for AFS vcache
600 * entries or we are using the maximum number of vcache entries,
601 * then free some. (if our usage is > 33% we should free some, if
602 * our usage is > afs_maxvcount, set elsewhere to 0.5*nvnode,
603 * we _must_ free some -- no choice).
605 if (((3 * afs_vcount) > nvnode) || (afs_vcount >= afs_maxvcount)) {
607 struct afs_q *tq, *uq;
612 for (tq = VLRU.prev; tq != &VLRU && anumber > 0; tq = uq) {
615 if (tvc->states & CVFlushed)
616 refpanic("CVFlushed on VLRU");
617 else if (i++ > afs_maxvcount)
618 refpanic("Exceeded pool of AFS vnodes(VLRU cycle?)");
619 else if (QNext(uq) != tq)
620 refpanic("VLRU inconsistent");
621 else if (VREFCOUNT(tvc) < 1)
622 refpanic("refcnt 0 on VLRU");
624 if (VREFCOUNT(tvc) == 1 && tvc->opens == 0
625 && (tvc->states & CUnlinkedDel) == 0) {
626 code = afs_FlushVCache(tvc, &fv_slept);
633 continue; /* start over - may have raced. */
639 if (anumber == VCACHE_FREE) {
640 printf("NewVCache: warning none freed, using %d of %d\n",
641 afs_vcount, afs_maxvcount);
642 if (afs_vcount >= afs_maxvcount) {
643 osi_Panic("NewVCache - none freed");
644 /* XXX instead of panicing, should do afs_maxvcount++
645 * and magic up another one */
651 if (getnewvnode(MOUNT_AFS, &Afs_vnodeops, &nvc)) {
652 /* What should we do ???? */
653 osi_Panic("afs_NewVCache: no more vnodes");
658 tvc->nextfree = NULL;
660 #else /* AFS_OSF_ENV */
661 /* pull out a free cache entry */
664 for (tq = VLRU.prev; (anumber > 0) && (tq != &VLRU); tq = uq) {
668 if (tvc->states & CVFlushed) {
669 refpanic("CVFlushed on VLRU");
670 } else if (i++ > 2 * afs_cacheStats) { /* even allowing for a few xallocs... */
671 refpanic("Increase -stat parameter of afsd(VLRU cycle?)");
672 } else if (QNext(uq) != tq) {
673 refpanic("VLRU inconsistent");
675 #ifdef AFS_DARWIN_ENV
676 if ((VREFCOUNT(tvc) < DARWIN_REFBASE) ||
677 (VREFCOUNT(tvc) < 1 + DARWIN_REFBASE &&
678 UBCINFOEXISTS(&tvc->v))) {
681 (UBCINFOEXISTS(&tvc->v) ? 1 : 0));
683 if (tvc->opens == 0 && ((tvc->states & CUnlinkedDel) == 0)
684 && VREFCOUNT(tvc) == DARWIN_REFBASE + 1
685 && UBCINFOEXISTS(&tvc->v)) {
686 osi_VM_TryReclaim(tvc, &fv_slept);
690 continue; /* start over - may have raced. */
693 #elif defined(AFS_LINUX22_ENV)
694 if (tvc != afs_globalVp && VREFCOUNT(tvc) && tvc->opens == 0) {
695 struct dentry *dentry;
696 struct list_head *cur, *head = &(AFSTOI(tvc))->i_dentry;
701 #if defined(AFS_LINUX24_ENV)
702 spin_lock(&dcache_lock);
705 while ((cur = cur->next) != head) {
706 dentry = list_entry(cur, struct dentry, d_alias);
708 if (d_unhashed(dentry))
713 #if defined(AFS_LINUX24_ENV)
714 spin_unlock(&dcache_lock);
716 if (d_invalidate(dentry) == -EBUSY) {
718 /* perhaps lock and try to continue? (use cur as head?) */
724 #if defined(AFS_LINUX24_ENV)
725 spin_unlock(&dcache_lock);
733 if (VREFCOUNT(tvc) ==
734 #ifdef AFS_DARWIN_ENV
739 && tvc->opens == 0 && (tvc->states & CUnlinkedDel) == 0) {
740 #if defined(AFS_XBSD_ENV)
742 * vgone() reclaims the vnode, which calls afs_FlushVCache(),
743 * then it puts the vnode on the free list.
744 * If we don't do this we end up with a cleaned vnode that's
745 * not on the free list.
746 * XXX assume FreeBSD is the same for now.
751 code = afs_FlushVCache(tvc, &fv_slept);
759 continue; /* start over - may have raced. */
767 /* none free, making one is better than a panic */
768 afs_stats_cmperf.vcacheXAllocs++; /* count in case we have a leak */
769 tvc = (struct vcache *)afs_osi_Alloc(sizeof(struct vcache));
770 #ifdef KERNEL_HAVE_PIN
771 pin((char *)tvc, sizeof(struct vcache)); /* XXX */
774 /* In case it still comes here we need to fill this */
775 tvc->v.v_vm_info = VM_INFO_NULL;
776 vm_info_init(tvc->v.v_vm_info);
777 /* perhaps we should also do close_flush on non-NeXT mach systems;
778 * who knows; we don't currently have the sources.
780 #endif /* AFS_MACH_ENV */
781 #if defined(AFS_SGI_ENV)
783 char name[METER_NAMSZ];
784 memset(tvc, 0, sizeof(struct vcache));
785 tvc->v.v_number = ++afsvnumbers;
786 tvc->vc_rwlockid = OSI_NO_LOCKID;
787 initnsema(&tvc->vc_rwlock, 1,
788 makesname(name, "vrw", tvc->v.v_number));
789 #ifndef AFS_SGI53_ENV
790 initnsema(&tvc->v.v_sync, 0,
791 makesname(name, "vsy", tvc->v.v_number));
793 #ifndef AFS_SGI62_ENV
794 initnlock(&tvc->v.v_lock,
795 makesname(name, "vlk", tvc->v.v_number));
798 #endif /* AFS_SGI_ENV */
800 tvc = freeVCList; /* take from free list */
801 freeVCList = tvc->nextfree;
802 tvc->nextfree = NULL;
804 #endif /* AFS_OSF_ENV */
807 vm_info_ptr = tvc->v.v_vm_info;
808 #endif /* AFS_MACH_ENV */
810 #if defined(AFS_XBSD_ENV)
812 panic("afs_NewVCache(): free vcache with vnode attached");
815 #if !defined(AFS_SGI_ENV) && !defined(AFS_OSF_ENV)
816 memset((char *)tvc, 0, sizeof(struct vcache));
821 RWLOCK_INIT(&tvc->lock, "vcache lock");
822 #if defined(AFS_SUN5_ENV)
823 RWLOCK_INIT(&tvc->vlock, "vcache vlock");
824 #endif /* defined(AFS_SUN5_ENV) */
827 tvc->v.v_vm_info = vm_info_ptr;
828 tvc->v.v_vm_info->pager = MEMORY_OBJECT_NULL;
829 #endif /* AFS_MACH_ENV */
832 afs_nbsd_getnewvnode(tvc); /* includes one refcount */
834 lockinit(&tvc->rwlock, PINOD, "vcache", 0, 0);
841 #ifdef AFS_FBSD50_ENV
842 if (getnewvnode(MOUNT_AFS, afs_globalVFS, afs_vnodeop_p, &vp))
844 if (getnewvnode(VT_AFS, afs_globalVFS, afs_vnodeop_p, &vp))
846 panic("afs getnewvnode"); /* can't happen */
848 if (tvc->v != NULL) {
849 /* I'd like to know if this ever happens...
850 * We don't drop global for the rest of this function,
851 * so if we do lose the race, the other thread should
852 * have found the same vnode and finished initializing
853 * the vcache entry. Is it conceivable that this vcache
854 * entry could be recycled during this interval? If so,
855 * then there probably needs to be some sort of additional
856 * mutual exclusion (an Embryonic flag would suffice).
858 printf("afs_NewVCache: lost the race\n");
862 tvc->v->v_data = tvc;
863 lockinit(&tvc->rwlock, PINOD, "vcache", 0, 0);
866 tvc->parentVnode = 0;
868 tvc->linkData = NULL;
871 tvc->execsOrWriters = 0;
875 tvc->last_looker = 0;
877 tvc->asynchrony = -1;
879 afs_symhint_inval(tvc);
881 tvc->flushDV.low = tvc->flushDV.high = AFS_MAXDV;
884 tvc->truncPos = AFS_NOTRUNC; /* don't truncate until we need to */
885 hzero(tvc->m.DataVersion); /* in case we copy it into flushDV */
886 #if defined(AFS_LINUX22_ENV)
888 struct inode *ip = AFSTOI(tvc);
889 #if defined(AFS_LINUX24_ENV)
890 struct address_space *mapping = &ip->i_data;
893 #if defined(AFS_LINUX26_ENV)
896 sema_init(&ip->i_sem, 1);
897 INIT_LIST_HEAD(&ip->i_hash);
898 INIT_LIST_HEAD(&ip->i_dentry);
899 #if defined(AFS_LINUX24_ENV)
900 sema_init(&ip->i_zombie, 1);
901 init_waitqueue_head(&ip->i_wait);
902 spin_lock_init(&ip->i_data.i_shared_lock);
903 #ifdef STRUCT_ADDRESS_SPACE_HAS_PAGE_LOCK
904 spin_lock_init(&ip->i_data.page_lock);
906 INIT_LIST_HEAD(&ip->i_data.clean_pages);
907 INIT_LIST_HEAD(&ip->i_data.dirty_pages);
908 INIT_LIST_HEAD(&ip->i_data.locked_pages);
909 INIT_LIST_HEAD(&ip->i_dirty_buffers);
910 #ifdef STRUCT_INODE_HAS_I_DIRTY_DATA_BUFFERS
911 INIT_LIST_HEAD(&ip->i_dirty_data_buffers);
913 #ifdef STRUCT_INODE_HAS_I_DEVICES
914 INIT_LIST_HEAD(&ip->i_devices);
916 #ifdef STRUCT_INODE_HAS_I_TRUNCATE_SEM
917 init_rwsem(&ip->i_truncate_sem);
919 #ifdef STRUCT_INODE_HAS_I_ALLOC_SEM
920 init_rwsem(&ip->i_alloc_sem);
923 #else /* AFS_LINUX22_ENV */
924 sema_init(&ip->i_atomic_write, 1);
925 init_waitqueue(&ip->i_wait);
929 #if defined(AFS_LINUX24_ENV)
931 ip->i_mapping = mapping;
932 #ifdef STRUCT_ADDRESS_SPACE_HAS_GFP_MASK
933 ip->i_data.gfp_mask = GFP_HIGHUSER;
935 #if defined(AFS_LINUX26_ENV)
936 mapping_set_gfp_mask(mapping, GFP_HIGHUSER);
938 extern struct backing_dev_info afs_backing_dev_info;
940 mapping->backing_dev_info = &afs_backing_dev_info;
945 #if !defined(AFS_LINUX26_ENV)
947 ip->i_dev = afs_globalVFS->s_dev;
949 #ifdef STRUCT_INODE_HAS_I_SECURITY
950 ip->i_security = NULL;
951 if (security_inode_alloc(ip))
952 panic("Cannot allocate inode security");
955 ip->i_sb = afs_globalVFS;
956 put_inode_on_dummy_list(ip);
957 #ifdef STRUCT_INODE_HAS_I_SB_LIST
958 list_add(&ip->i_sb_list, &ip->i_sb->s_inodes);
960 #ifdef STRUCT_INODE_HAS_INOTIFY_LOCK
961 INIT_LIST_HEAD(&inode->inotify_watches);
962 spin_lock_init(&inode->inotify_lock);
968 /* Hold it for the LRU (should make count 2) */
969 VN_HOLD(AFSTOV(tvc));
970 #else /* AFS_OSF_ENV */
971 #if !defined(AFS_XBSD_ENV)
972 VREFCOUNT_SET(tvc, 1); /* us */
973 #endif /* AFS_XBSD_ENV */
974 #endif /* AFS_OSF_ENV */
976 LOCK_INIT(&tvc->pvmlock, "vcache pvmlock");
977 tvc->vmh = tvc->segid = NULL;
980 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
981 #if defined(AFS_SUN5_ENV)
982 rw_init(&tvc->rwlock, "vcache rwlock", RW_DEFAULT, NULL);
984 #if defined(AFS_SUN55_ENV)
985 /* This is required if the kaio (kernel aynchronous io)
986 ** module is installed. Inside the kernel, the function
987 ** check_vp( common/os/aio.c) checks to see if the kernel has
988 ** to provide asynchronous io for this vnode. This
989 ** function extracts the device number by following the
990 ** v_data field of the vnode. If we do not set this field
991 ** then the system panics. The value of the v_data field
992 ** is not really important for AFS vnodes because the kernel
993 ** does not do asynchronous io for regular files. Hence,
994 ** for the time being, we fill up the v_data field with the
995 ** vnode pointer itself. */
996 tvc->v.v_data = (char *)tvc;
997 #endif /* AFS_SUN55_ENV */
999 afs_BozonInit(&tvc->pvnLock, tvc);
1003 tvc->callback = serverp; /* to minimize chance that clear
1004 * request is lost */
1005 /* initialize vnode data, note vrefCount is v.v_count */
1007 /* Don't forget to free the gnode space */
1008 tvc->v.v_gnode = gnodepnt =
1009 (struct gnode *)osi_AllocSmallSpace(sizeof(struct gnode));
1010 memset((char *)gnodepnt, 0, sizeof(struct gnode));
1012 #ifdef AFS_SGI64_ENV
1013 memset((void *)&(tvc->vc_bhv_desc), 0, sizeof(tvc->vc_bhv_desc));
1014 bhv_desc_init(&(tvc->vc_bhv_desc), tvc, tvc, &Afs_vnodeops);
1015 #ifdef AFS_SGI65_ENV
1016 vn_bhv_head_init(&(tvc->v.v_bh), "afsvp");
1017 vn_bhv_insert_initial(&(tvc->v.v_bh), &(tvc->vc_bhv_desc));
1019 bhv_head_init(&(tvc->v.v_bh));
1020 bhv_insert_initial(&(tvc->v.v_bh), &(tvc->vc_bhv_desc));
1022 #ifdef AFS_SGI65_ENV
1023 tvc->v.v_mreg = tvc->v.v_mregb = (struct pregion *)tvc;
1024 #ifdef VNODE_TRACING
1025 tvc->v.v_trace = ktrace_alloc(VNODE_TRACE_SIZE, 0);
1027 init_bitlock(&tvc->v.v_pcacheflag, VNODE_PCACHE_LOCKBIT, "afs_pcache",
1029 init_mutex(&tvc->v.v_filocksem, MUTEX_DEFAULT, "afsvfl", (long)tvc);
1030 init_mutex(&tvc->v.v_buf_lock, MUTEX_DEFAULT, "afsvnbuf", (long)tvc);
1032 vnode_pcache_init(&tvc->v);
1033 #if defined(DEBUG) && defined(VNODE_INIT_BITLOCK)
1034 /* Above define is never true execpt in SGI test kernels. */
1035 init_bitlock(&(tvc->v.v_flag, VLOCK, "vnode", tvc->v.v_number);
1037 #ifdef INTR_KTHREADS
1038 AFS_VN_INIT_BUF_LOCK(&(tvc->v));
1041 SetAfsVnode(AFSTOV(tvc));
1042 #endif /* AFS_SGI64_ENV */
1043 #ifdef AFS_DARWIN_ENV
1044 tvc->v.v_ubcinfo = UBC_INFO_NULL;
1045 lockinit(&tvc->rwlock, PINOD, "vcache rwlock", 0, 0);
1046 cache_purge(AFSTOV(tvc));
1047 tvc->v.v_data = tvc;
1048 tvc->v.v_tag = VT_AFS;
1049 /* VLISTNONE(&tvc->v); */
1050 tvc->v.v_freelist.tqe_next = 0;
1051 tvc->v.v_freelist.tqe_prev = (struct vnode **)0xdeadb;
1052 tvc->vrefCount += DARWIN_REFBASE;
1055 * The proper value for mvstat (for root fids) is setup by the caller.
1058 if (afid->Fid.Vnode == 1 && afid->Fid.Unique == 1)
1060 if (afs_globalVFS == 0)
1061 osi_Panic("afs globalvfs");
1062 vSetVfsp(tvc, afs_globalVFS);
1063 vSetType(tvc, VREG);
1065 tvc->v.v_vfsnext = afs_globalVFS->vfs_vnodes; /* link off vfs */
1066 tvc->v.v_vfsprev = NULL;
1067 afs_globalVFS->vfs_vnodes = &tvc->v;
1068 if (tvc->v.v_vfsnext != NULL)
1069 tvc->v.v_vfsnext->v_vfsprev = &tvc->v;
1070 tvc->v.v_next = gnodepnt->gn_vnode; /*Single vnode per gnode for us! */
1071 gnodepnt->gn_vnode = &tvc->v;
1074 tvc->v.g_dev = ((struct mount *)afs_globalVFS->vfs_data)->m_dev;
1076 #if defined(AFS_DUX40_ENV)
1077 insmntque(tvc, afs_globalVFS, &afs_ubcops);
1080 /* Is this needed??? */
1081 insmntque(tvc, afs_globalVFS);
1082 #endif /* AFS_OSF_ENV */
1083 #endif /* AFS_DUX40_ENV */
1084 #if defined(AFS_SGI_ENV)
1085 VN_SET_DPAGES(&(tvc->v), (struct pfdat *)NULL);
1086 osi_Assert((tvc->v.v_flag & VINACT) == 0);
1088 osi_Assert(VN_GET_PGCNT(&(tvc->v)) == 0);
1089 osi_Assert(tvc->mapcnt == 0 && tvc->vc_locktrips == 0);
1090 osi_Assert(tvc->vc_rwlockid == OSI_NO_LOCKID);
1091 osi_Assert(tvc->v.v_filocks == NULL);
1092 #if !defined(AFS_SGI65_ENV)
1093 osi_Assert(tvc->v.v_filocksem == NULL);
1095 osi_Assert(tvc->cred == NULL);
1096 #ifdef AFS_SGI64_ENV
1097 vnode_pcache_reinit(&tvc->v);
1098 tvc->v.v_rdev = NODEV;
1100 vn_initlist((struct vnlist *)&tvc->v);
1102 #endif /* AFS_SGI_ENV */
1104 osi_dnlc_purgedp(tvc); /* this may be overkill */
1105 memset((char *)&(tvc->quick), 0, sizeof(struct vtodc));
1106 memset((char *)&(tvc->callsort), 0, sizeof(struct afs_q));
1110 tvc->hnext = afs_vhashT[i];
1111 afs_vhashT[i] = tvc;
1112 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
1113 refpanic("NewVCache VLRU inconsistent");
1115 QAdd(&VLRU, &tvc->vlruq); /* put in lruq */
1116 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
1117 refpanic("NewVCache VLRU inconsistent2");
1119 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
1120 refpanic("NewVCache VLRU inconsistent3");
1122 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
1123 refpanic("NewVCache VLRU inconsistent4");
1129 } /*afs_NewVCache */
1133 * afs_FlushActiveVcaches
1139 * doflocks : Do we handle flocks?
1141 /* LOCK: afs_FlushActiveVcaches afs_xvcache N */
1143 afs_FlushActiveVcaches(register afs_int32 doflocks)
1145 register struct vcache *tvc;
1147 register struct conn *tc;
1148 register afs_int32 code;
1149 register struct AFS_UCRED *cred = NULL;
1150 struct vrequest treq, ureq;
1151 struct AFSVolSync tsync;
1154 AFS_STATCNT(afs_FlushActiveVcaches);
1155 ObtainReadLock(&afs_xvcache);
1156 for (i = 0; i < VCSIZE; i++) {
1157 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
1158 if (doflocks && tvc->flockCount != 0) {
1159 /* if this entry has an flock, send a keep-alive call out */
1161 ReleaseReadLock(&afs_xvcache);
1162 ObtainWriteLock(&tvc->lock, 51);
1164 afs_InitReq(&treq, afs_osi_credp);
1165 treq.flags |= O_NONBLOCK;
1167 tc = afs_Conn(&tvc->fid, &treq, SHARED_LOCK);
1169 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_EXTENDLOCK);
1172 RXAFS_ExtendLock(tc->id,
1173 (struct AFSFid *)&tvc->fid.Fid,
1179 } while (afs_Analyze
1180 (tc, code, &tvc->fid, &treq,
1181 AFS_STATS_FS_RPCIDX_EXTENDLOCK, SHARED_LOCK, NULL));
1183 ReleaseWriteLock(&tvc->lock);
1184 ObtainReadLock(&afs_xvcache);
1188 if ((tvc->states & CCore) || (tvc->states & CUnlinkedDel)) {
1190 * Don't let it evaporate in case someone else is in
1191 * this code. Also, drop the afs_xvcache lock while
1192 * getting vcache locks.
1195 ReleaseReadLock(&afs_xvcache);
1196 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1197 afs_BozonLock(&tvc->pvnLock, tvc);
1199 #if defined(AFS_SGI_ENV)
1201 * That's because if we come in via the CUnlinkedDel bit state path we'll be have 0 refcnt
1203 osi_Assert(VREFCOUNT(tvc) > 0);
1204 AFS_RWLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1206 ObtainWriteLock(&tvc->lock, 52);
1207 if (tvc->states & CCore) {
1208 tvc->states &= ~CCore;
1209 /* XXXX Find better place-holder for cred XXXX */
1210 cred = (struct AFS_UCRED *)tvc->linkData;
1211 tvc->linkData = NULL; /* XXX */
1212 afs_InitReq(&ureq, cred);
1213 afs_Trace2(afs_iclSetp, CM_TRACE_ACTCCORE,
1214 ICL_TYPE_POINTER, tvc, ICL_TYPE_INT32,
1215 tvc->execsOrWriters);
1216 code = afs_StoreOnLastReference(tvc, &ureq);
1217 ReleaseWriteLock(&tvc->lock);
1218 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1219 afs_BozonUnlock(&tvc->pvnLock, tvc);
1221 hzero(tvc->flushDV);
1224 if (code && code != VNOVNODE) {
1225 afs_StoreWarn(code, tvc->fid.Fid.Volume,
1226 /* /dev/console */ 1);
1228 } else if (tvc->states & CUnlinkedDel) {
1232 ReleaseWriteLock(&tvc->lock);
1233 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1234 afs_BozonUnlock(&tvc->pvnLock, tvc);
1236 #if defined(AFS_SGI_ENV)
1237 AFS_RWUNLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1239 afs_remunlink(tvc, 0);
1240 #if defined(AFS_SGI_ENV)
1241 AFS_RWLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1244 /* lost (or won, perhaps) the race condition */
1245 ReleaseWriteLock(&tvc->lock);
1246 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV)
1247 afs_BozonUnlock(&tvc->pvnLock, tvc);
1250 #if defined(AFS_SGI_ENV)
1251 AFS_RWUNLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
1253 ObtainReadLock(&afs_xvcache);
1259 AFS_RELE(AFSTOV(tvc));
1261 /* Matches write code setting CCore flag */
1265 #ifdef AFS_DARWIN_ENV
1266 if (VREFCOUNT(tvc) == 1 + DARWIN_REFBASE
1267 && UBCINFOEXISTS(&tvc->v)) {
1269 panic("flushactive open, hasubc, but refcnt 1");
1270 osi_VM_TryReclaim(tvc, 0);
1275 ReleaseReadLock(&afs_xvcache);
1283 * Make sure a cache entry is up-to-date status-wise.
1285 * NOTE: everywhere that calls this can potentially be sped up
1286 * by checking CStatd first, and avoiding doing the InitReq
1287 * if this is up-to-date.
1289 * Anymore, the only places that call this KNOW already that the
1290 * vcache is not up-to-date, so we don't screw around.
1293 * avc : Ptr to vcache entry to verify.
1298 afs_VerifyVCache2(struct vcache *avc, struct vrequest *areq)
1300 register struct vcache *tvc;
1302 AFS_STATCNT(afs_VerifyVCache);
1304 #if defined(AFS_OSF_ENV)
1305 ObtainReadLock(&avc->lock);
1306 if (afs_IsWired(avc)) {
1307 ReleaseReadLock(&avc->lock);
1310 ReleaseReadLock(&avc->lock);
1311 #endif /* AFS_OSF_ENV */
1312 /* otherwise we must fetch the status info */
1314 ObtainWriteLock(&avc->lock, 53);
1315 if (avc->states & CStatd) {
1316 ReleaseWriteLock(&avc->lock);
1319 ObtainWriteLock(&afs_xcbhash, 461);
1320 avc->states &= ~(CStatd | CUnique);
1321 avc->callback = NULL;
1322 afs_DequeueCallback(avc);
1323 ReleaseWriteLock(&afs_xcbhash);
1324 ReleaseWriteLock(&avc->lock);
1326 /* since we've been called back, or the callback has expired,
1327 * it's possible that the contents of this directory, or this
1328 * file's name have changed, thus invalidating the dnlc contents.
1330 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
1331 osi_dnlc_purgedp(avc);
1333 osi_dnlc_purgevp(avc);
1335 /* fetch the status info */
1336 tvc = afs_GetVCache(&avc->fid, areq, NULL, avc);
1339 /* Put it back; caller has already incremented vrefCount */
1343 } /*afs_VerifyVCache */
1350 * Simple copy of stat info into cache.
1353 * avc : Ptr to vcache entry involved.
1354 * astat : Ptr to stat info to copy.
1357 * Nothing interesting.
1359 * Callers: as of 1992-04-29, only called by WriteVCache
1362 afs_SimpleVStat(register struct vcache *avc,
1363 register struct AFSFetchStatus *astat, struct vrequest *areq)
1366 AFS_STATCNT(afs_SimpleVStat);
1369 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1370 && !AFS_VN_MAPPED((vnode_t *) avc)) {
1372 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)) {
1374 #ifdef AFS_64BIT_CLIENT
1375 FillInt64(length, astat->Length_hi, astat->Length);
1376 #else /* AFS_64BIT_CLIENT */
1377 length = astat->Length;
1378 #endif /* AFS_64BIT_CLIENT */
1379 #if defined(AFS_SGI_ENV)
1380 osi_Assert((valusema(&avc->vc_rwlock) <= 0)
1381 && (OSI_GET_LOCKID() == avc->vc_rwlockid));
1382 if (length < avc->m.Length) {
1383 vnode_t *vp = (vnode_t *) avc;
1385 osi_Assert(WriteLocked(&avc->lock));
1386 ReleaseWriteLock(&avc->lock);
1388 PTOSSVP(vp, (off_t) length, (off_t) MAXLONG);
1390 ObtainWriteLock(&avc->lock, 67);
1393 /* if writing the file, don't fetch over this value */
1394 afs_Trace3(afs_iclSetp, CM_TRACE_SIMPLEVSTAT, ICL_TYPE_POINTER, avc,
1395 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length),
1396 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1397 avc->m.Length = length;
1398 avc->m.Date = astat->ClientModTime;
1400 avc->m.Owner = astat->Owner;
1401 avc->m.Group = astat->Group;
1402 avc->m.Mode = astat->UnixModeBits;
1403 if (vType(avc) == VREG) {
1404 avc->m.Mode |= S_IFREG;
1405 } else if (vType(avc) == VDIR) {
1406 avc->m.Mode |= S_IFDIR;
1407 } else if (vType(avc) == VLNK) {
1408 avc->m.Mode |= S_IFLNK;
1409 if ((avc->m.Mode & 0111) == 0)
1412 if (avc->states & CForeign) {
1413 struct axscache *ac;
1414 avc->anyAccess = astat->AnonymousAccess;
1416 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1418 * Caller has at least one bit not covered by anonymous, and
1419 * thus may have interesting rights.
1421 * HOWEVER, this is a really bad idea, because any access query
1422 * for bits which aren't covered by anonymous, on behalf of a user
1423 * who doesn't have any special rights, will result in an answer of
1424 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1425 * It's an especially bad idea under Ultrix, since (due to the lack of
1426 * a proper access() call) it must perform several afs_access() calls
1427 * in order to create magic mode bits that vary according to who makes
1428 * the call. In other words, _every_ stat() generates a test for
1431 #endif /* badidea */
1432 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1433 ac->axess = astat->CallerAccess;
1434 else /* not found, add a new one if possible */
1435 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1439 } /*afs_SimpleVStat */
1446 * Store the status info *only* back to the server for a
1450 * avc : Ptr to the vcache entry.
1451 * astatus : Ptr to the status info to store.
1452 * areq : Ptr to the associated vrequest.
1455 * Must be called with a shared lock held on the vnode.
1459 afs_WriteVCache(register struct vcache *avc,
1460 register struct AFSStoreStatus *astatus,
1461 struct vrequest *areq)
1465 struct AFSFetchStatus OutStatus;
1466 struct AFSVolSync tsync;
1468 AFS_STATCNT(afs_WriteVCache);
1469 afs_Trace2(afs_iclSetp, CM_TRACE_WVCACHE, ICL_TYPE_POINTER, avc,
1470 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
1473 tc = afs_Conn(&avc->fid, areq, SHARED_LOCK);
1475 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STORESTATUS);
1478 RXAFS_StoreStatus(tc->id, (struct AFSFid *)&avc->fid.Fid,
1479 astatus, &OutStatus, &tsync);
1484 } while (afs_Analyze
1485 (tc, code, &avc->fid, areq, AFS_STATS_FS_RPCIDX_STORESTATUS,
1486 SHARED_LOCK, NULL));
1488 UpgradeSToWLock(&avc->lock, 20);
1490 /* success, do the changes locally */
1491 afs_SimpleVStat(avc, &OutStatus, areq);
1493 * Update the date, too. SimpleVStat didn't do this, since
1494 * it thought we were doing this after fetching new status
1495 * over a file being written.
1497 avc->m.Date = OutStatus.ClientModTime;
1499 /* failure, set up to check with server next time */
1500 ObtainWriteLock(&afs_xcbhash, 462);
1501 afs_DequeueCallback(avc);
1502 avc->states &= ~(CStatd | CUnique); /* turn off stat valid flag */
1503 ReleaseWriteLock(&afs_xcbhash);
1504 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
1505 osi_dnlc_purgedp(avc); /* if it (could be) a directory */
1507 ConvertWToSLock(&avc->lock);
1510 } /*afs_WriteVCache */
1516 * Copy astat block into vcache info
1519 * avc : Ptr to vcache entry.
1520 * astat : Ptr to stat block to copy in.
1521 * areq : Ptr to associated request.
1524 * Must be called under a write lock
1526 * Note: this code may get dataversion and length out of sync if the file has
1527 * been modified. This is less than ideal. I haven't thought about
1528 * it sufficiently to be certain that it is adequate.
1531 afs_ProcessFS(register struct vcache *avc,
1532 register struct AFSFetchStatus *astat, struct vrequest *areq)
1535 AFS_STATCNT(afs_ProcessFS);
1537 #ifdef AFS_64BIT_CLIENT
1538 FillInt64(length, astat->Length_hi, astat->Length);
1539 #else /* AFS_64BIT_CLIENT */
1540 length = astat->Length;
1541 #endif /* AFS_64BIT_CLIENT */
1542 /* WARNING: afs_DoBulkStat uses the Length field to store a sequence
1543 * number for each bulk status request. Under no circumstances
1544 * should afs_DoBulkStat store a sequence number if the new
1545 * length will be ignored when afs_ProcessFS is called with
1546 * new stats. If you change the following conditional then you
1547 * also need to change the conditional in afs_DoBulkStat. */
1549 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)
1550 && !AFS_VN_MAPPED((vnode_t *) avc)) {
1552 if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)) {
1554 /* if we're writing or mapping this file, don't fetch over these
1557 afs_Trace3(afs_iclSetp, CM_TRACE_PROCESSFS, ICL_TYPE_POINTER, avc,
1558 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length),
1559 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length));
1560 avc->m.Length = length;
1561 avc->m.Date = astat->ClientModTime;
1563 hset64(avc->m.DataVersion, astat->dataVersionHigh, astat->DataVersion);
1564 avc->m.Owner = astat->Owner;
1565 avc->m.Mode = astat->UnixModeBits;
1566 avc->m.Group = astat->Group;
1567 avc->m.LinkCount = astat->LinkCount;
1568 if (astat->FileType == File) {
1569 vSetType(avc, VREG);
1570 avc->m.Mode |= S_IFREG;
1571 } else if (astat->FileType == Directory) {
1572 vSetType(avc, VDIR);
1573 avc->m.Mode |= S_IFDIR;
1574 } else if (astat->FileType == SymbolicLink) {
1575 if (afs_fakestat_enable && (avc->m.Mode & 0111) == 0) {
1576 vSetType(avc, VDIR);
1577 avc->m.Mode |= S_IFDIR;
1579 vSetType(avc, VLNK);
1580 avc->m.Mode |= S_IFLNK;
1582 if ((avc->m.Mode & 0111) == 0) {
1586 avc->anyAccess = astat->AnonymousAccess;
1588 if ((astat->CallerAccess & ~astat->AnonymousAccess))
1590 * Caller has at least one bit not covered by anonymous, and
1591 * thus may have interesting rights.
1593 * HOWEVER, this is a really bad idea, because any access query
1594 * for bits which aren't covered by anonymous, on behalf of a user
1595 * who doesn't have any special rights, will result in an answer of
1596 * the form "I don't know, lets make a FetchStatus RPC and find out!"
1597 * It's an especially bad idea under Ultrix, since (due to the lack of
1598 * a proper access() call) it must perform several afs_access() calls
1599 * in order to create magic mode bits that vary according to who makes
1600 * the call. In other words, _every_ stat() generates a test for
1603 #endif /* badidea */
1605 struct axscache *ac;
1606 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
1607 ac->axess = astat->CallerAccess;
1608 else /* not found, add a new one if possible */
1609 afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess);
1611 #ifdef AFS_LINUX22_ENV
1612 vcache2inode(avc); /* Set the inode attr cache */
1614 #ifdef AFS_DARWIN_ENV
1615 osi_VM_Setup(avc, 1);
1618 } /*afs_ProcessFS */
1622 afs_RemoteLookup(register struct VenusFid *afid, struct vrequest *areq,
1623 char *name, struct VenusFid *nfid,
1624 struct AFSFetchStatus *OutStatusp,
1625 struct AFSCallBack *CallBackp, struct server **serverp,
1626 struct AFSVolSync *tsyncp)
1630 register struct conn *tc;
1631 struct AFSFetchStatus OutDirStatus;
1634 name = ""; /* XXX */
1636 tc = afs_Conn(afid, areq, SHARED_LOCK);
1639 *serverp = tc->srvr->server;
1641 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_XLOOKUP);
1644 RXAFS_Lookup(tc->id, (struct AFSFid *)&afid->Fid, name,
1645 (struct AFSFid *)&nfid->Fid, OutStatusp,
1646 &OutDirStatus, CallBackp, tsyncp);
1651 } while (afs_Analyze
1652 (tc, code, afid, areq, AFS_STATS_FS_RPCIDX_XLOOKUP, SHARED_LOCK,
1663 * Given a file id and a vrequest structure, fetch the status
1664 * information associated with the file.
1668 * areq : Ptr to associated vrequest structure, specifying the
1669 * user whose authentication tokens will be used.
1670 * avc : caller may already have a vcache for this file, which is
1674 * The cache entry is returned with an increased vrefCount field.
1675 * The entry must be discarded by calling afs_PutVCache when you
1676 * are through using the pointer to the cache entry.
1678 * You should not hold any locks when calling this function, except
1679 * locks on other vcache entries. If you lock more than one vcache
1680 * entry simultaneously, you should lock them in this order:
1682 * 1. Lock all files first, then directories.
1683 * 2. Within a particular type, lock entries in Fid.Vnode order.
1685 * This locking hierarchy is convenient because it allows locking
1686 * of a parent dir cache entry, given a file (to check its access
1687 * control list). It also allows renames to be handled easily by
1688 * locking directories in a constant order.
1689 * NB. NewVCache -> FlushVCache presently (4/10/95) drops the xvcache lock.
1691 /* might have a vcache structure already, which must
1692 * already be held by the caller */
1695 afs_GetVCache(register struct VenusFid *afid, struct vrequest *areq,
1696 afs_int32 * cached, struct vcache *avc)
1699 afs_int32 code, newvcache = 0;
1700 register struct vcache *tvc;
1704 AFS_STATCNT(afs_GetVCache);
1707 *cached = 0; /* Init just in case */
1709 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1713 ObtainSharedLock(&afs_xvcache, 5);
1715 tvc = afs_FindVCache(afid, &retry, DO_STATS | DO_VLRU);
1717 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1718 ReleaseSharedLock(&afs_xvcache);
1719 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1727 if (tvc->states & CStatd) {
1728 ReleaseSharedLock(&afs_xvcache);
1732 UpgradeSToWLock(&afs_xvcache, 21);
1734 /* no cache entry, better grab one */
1735 tvc = afs_NewVCache(afid, NULL);
1738 ConvertWToSLock(&afs_xvcache);
1739 afs_stats_cmperf.vcacheMisses++;
1742 ReleaseSharedLock(&afs_xvcache);
1744 ObtainWriteLock(&tvc->lock, 54);
1746 if (tvc->states & CStatd) {
1747 #ifdef AFS_LINUX22_ENV
1750 ReleaseWriteLock(&tvc->lock);
1751 #ifdef AFS_DARWIN_ENV
1752 osi_VM_Setup(tvc, 0);
1756 #if defined(AFS_OSF_ENV)
1757 if (afs_IsWired(tvc)) {
1758 ReleaseWriteLock(&tvc->lock);
1761 #endif /* AFS_OSF_ENV */
1763 VOP_LOCK(AFSTOV(tvc), LK_EXCLUSIVE | LK_RETRY, curproc);
1764 uvm_vnp_uncache(AFSTOV(tvc));
1765 VOP_UNLOCK(AFSTOV(tvc), 0, curproc);
1769 * XXX - I really don't like this. Should try to understand better.
1770 * It seems that sometimes, when we get called, we already hold the
1771 * lock on the vnode (e.g., from afs_getattr via afs_VerifyVCache).
1772 * We can't drop the vnode lock, because that could result in a race.
1773 * Sometimes, though, we get here and don't hold the vnode lock.
1774 * I hate code paths that sometimes hold locks and sometimes don't.
1775 * In any event, the dodge we use here is to check whether the vnode
1776 * is locked, and if it isn't, then we gain and drop it around the call
1777 * to vinvalbuf; otherwise, we leave it alone.
1784 #ifdef AFS_FBSD50_ENV
1785 iheldthelock = VOP_ISLOCKED(vp, curthread);
1787 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread);
1788 vinvalbuf(vp, V_SAVE, osi_curcred(), curthread, PINOD, 0);
1790 VOP_UNLOCK(vp, LK_EXCLUSIVE, curthread);
1792 iheldthelock = VOP_ISLOCKED(vp, curproc);
1794 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curproc);
1795 vinvalbuf(vp, V_SAVE, osi_curcred(), curproc, PINOD, 0);
1797 VOP_UNLOCK(vp, LK_EXCLUSIVE, curproc);
1802 ObtainWriteLock(&afs_xcbhash, 464);
1803 tvc->states &= ~CUnique;
1805 afs_DequeueCallback(tvc);
1806 ReleaseWriteLock(&afs_xcbhash);
1808 /* It is always appropriate to throw away all the access rights? */
1809 afs_FreeAllAxs(&(tvc->Access));
1810 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-volume info */
1812 if ((tvp->states & VForeign)) {
1814 tvc->states |= CForeign;
1815 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
1816 && (tvp->rootUnique == afid->Fid.Unique)) {
1820 if (tvp->states & VRO)
1822 if (tvp->states & VBackup)
1823 tvc->states |= CBackup;
1824 /* now copy ".." entry back out of volume structure, if necessary */
1825 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
1827 tvc->mvid = (struct VenusFid *)
1828 osi_AllocSmallSpace(sizeof(struct VenusFid));
1829 *tvc->mvid = tvp->dotdot;
1831 afs_PutVolume(tvp, READ_LOCK);
1835 afs_RemoveVCB(afid);
1837 struct AFSFetchStatus OutStatus;
1839 if (afs_DynrootNewVnode(tvc, &OutStatus)) {
1840 afs_ProcessFS(tvc, &OutStatus, areq);
1841 tvc->states |= CStatd | CUnique;
1844 code = afs_FetchStatus(tvc, afid, areq, &OutStatus);
1849 ReleaseWriteLock(&tvc->lock);
1851 ObtainReadLock(&afs_xvcache);
1853 ReleaseReadLock(&afs_xvcache);
1857 ReleaseWriteLock(&tvc->lock);
1860 } /*afs_GetVCache */
1865 afs_LookupVCache(struct VenusFid *afid, struct vrequest *areq,
1866 afs_int32 * cached, struct vcache *adp, char *aname)
1868 afs_int32 code, now, newvcache = 0;
1869 struct VenusFid nfid;
1870 register struct vcache *tvc;
1872 struct AFSFetchStatus OutStatus;
1873 struct AFSCallBack CallBack;
1874 struct AFSVolSync tsync;
1875 struct server *serverp = 0;
1879 AFS_STATCNT(afs_GetVCache);
1881 *cached = 0; /* Init just in case */
1883 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1887 ObtainReadLock(&afs_xvcache);
1888 tvc = afs_FindVCache(afid, &retry, DO_STATS /* no vlru */ );
1891 ReleaseReadLock(&afs_xvcache);
1893 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1894 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1898 ObtainReadLock(&tvc->lock);
1900 if (tvc->states & CStatd) {
1904 ReleaseReadLock(&tvc->lock);
1907 tvc->states &= ~CUnique;
1909 ReleaseReadLock(&tvc->lock);
1910 ObtainReadLock(&afs_xvcache);
1914 ReleaseReadLock(&afs_xvcache);
1916 /* lookup the file */
1919 origCBs = afs_allCBs; /* if anything changes, we don't have a cb */
1921 afs_RemoteLookup(&adp->fid, areq, aname, &nfid, &OutStatus, &CallBack,
1924 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1928 ObtainSharedLock(&afs_xvcache, 6);
1929 tvc = afs_FindVCache(&nfid, &retry, DO_VLRU /* no xstats now */ );
1931 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
1932 ReleaseSharedLock(&afs_xvcache);
1933 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
1939 /* no cache entry, better grab one */
1940 UpgradeSToWLock(&afs_xvcache, 22);
1941 tvc = afs_NewVCache(&nfid, serverp);
1943 ConvertWToSLock(&afs_xvcache);
1946 ReleaseSharedLock(&afs_xvcache);
1947 ObtainWriteLock(&tvc->lock, 55);
1949 /* It is always appropriate to throw away all the access rights? */
1950 afs_FreeAllAxs(&(tvc->Access));
1951 tvp = afs_GetVolume(afid, areq, READ_LOCK); /* copy useful per-vol info */
1953 if ((tvp->states & VForeign)) {
1955 tvc->states |= CForeign;
1956 if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
1957 && (tvp->rootUnique == afid->Fid.Unique))
1960 if (tvp->states & VRO)
1962 if (tvp->states & VBackup)
1963 tvc->states |= CBackup;
1964 /* now copy ".." entry back out of volume structure, if necessary */
1965 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
1967 tvc->mvid = (struct VenusFid *)
1968 osi_AllocSmallSpace(sizeof(struct VenusFid));
1969 *tvc->mvid = tvp->dotdot;
1974 ObtainWriteLock(&afs_xcbhash, 465);
1975 afs_DequeueCallback(tvc);
1976 tvc->states &= ~(CStatd | CUnique);
1977 ReleaseWriteLock(&afs_xcbhash);
1978 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
1979 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
1981 afs_PutVolume(tvp, READ_LOCK);
1982 ReleaseWriteLock(&tvc->lock);
1983 ObtainReadLock(&afs_xvcache);
1985 ReleaseReadLock(&afs_xvcache);
1989 ObtainWriteLock(&afs_xcbhash, 466);
1990 if (origCBs == afs_allCBs) {
1991 if (CallBack.ExpirationTime) {
1992 tvc->callback = serverp;
1993 tvc->cbExpires = CallBack.ExpirationTime + now;
1994 tvc->states |= CStatd | CUnique;
1995 tvc->states &= ~CBulkFetching;
1996 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvp);
1997 } else if (tvc->states & CRO) {
1998 /* adapt gives us an hour. */
1999 tvc->cbExpires = 3600 + osi_Time();
2000 /*XXX*/ tvc->states |= CStatd | CUnique;
2001 tvc->states &= ~CBulkFetching;
2002 afs_QueueCallback(tvc, CBHash(3600), tvp);
2004 tvc->callback = NULL;
2005 afs_DequeueCallback(tvc);
2006 tvc->states &= ~(CStatd | CUnique);
2007 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2008 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2011 afs_DequeueCallback(tvc);
2012 tvc->states &= ~CStatd;
2013 tvc->states &= ~CUnique;
2014 tvc->callback = NULL;
2015 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2016 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2018 ReleaseWriteLock(&afs_xcbhash);
2020 afs_PutVolume(tvp, READ_LOCK);
2021 afs_ProcessFS(tvc, &OutStatus, areq);
2023 ReleaseWriteLock(&tvc->lock);
2029 afs_GetRootVCache(struct VenusFid *afid, struct vrequest *areq,
2030 afs_int32 * cached, struct volume *tvolp)
2032 afs_int32 code = 0, i, newvcache = 0, haveStatus = 0;
2033 afs_int32 getNewFid = 0;
2035 struct VenusFid nfid;
2036 register struct vcache *tvc;
2037 struct server *serverp = 0;
2038 struct AFSFetchStatus OutStatus;
2039 struct AFSCallBack CallBack;
2040 struct AFSVolSync tsync;
2046 if (!tvolp->rootVnode || getNewFid) {
2047 struct VenusFid tfid;
2050 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
2051 origCBs = afs_allCBs; /* ignore InitCallBackState */
2053 afs_RemoteLookup(&tfid, areq, NULL, &nfid, &OutStatus, &CallBack,
2058 /* ReleaseReadLock(&tvolp->lock); */
2059 ObtainWriteLock(&tvolp->lock, 56);
2060 tvolp->rootVnode = afid->Fid.Vnode = nfid.Fid.Vnode;
2061 tvolp->rootUnique = afid->Fid.Unique = nfid.Fid.Unique;
2062 ReleaseWriteLock(&tvolp->lock);
2063 /* ObtainReadLock(&tvolp->lock);*/
2066 afid->Fid.Vnode = tvolp->rootVnode;
2067 afid->Fid.Unique = tvolp->rootUnique;
2070 ObtainSharedLock(&afs_xvcache, 7);
2072 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2073 if (!FidCmp(&(tvc->fid), afid)) {
2075 /* Grab this vnode, possibly reactivating from the free list */
2076 /* for the present (95.05.25) everything on the hash table is
2077 * definitively NOT in the free list -- at least until afs_reclaim
2078 * can be safely implemented */
2081 vg = vget(AFSTOV(tvc)); /* this bumps ref count */
2085 #endif /* AFS_OSF_ENV */
2086 #ifdef AFS_DARWIN14_ENV
2087 /* It'd really suck if we allowed duplicate vcaches for the
2088 * same fid to happen. Wonder if this will work? */
2089 struct vnode *vp = AFSTOV(tvc);
2090 if (vp->v_flag & (VXLOCK | VORECLAIM | VTERMINATE)) {
2091 printf("precluded FindVCache on %x (%d:%d:%d)\n",
2092 vp, tvc->fid.Fid.Volume, tvc->fid.Fid.Vnode,
2093 tvc->fid.Fid.Unique);
2094 simple_lock(&vp->v_interlock);
2095 SET(vp->v_flag, VTERMWANT);
2096 simple_unlock(&vp->v_interlock);
2097 (void)tsleep((caddr_t) & vp->v_ubcinfo, PINOD, "vget1", 0);
2098 printf("VTERMWANT ended on %x\n", vp);
2106 if (!haveStatus && (!tvc || !(tvc->states & CStatd))) {
2107 /* Mount point no longer stat'd or unknown. FID may have changed. */
2110 AFS_RELE(AFSTOV(tvc));
2114 ReleaseSharedLock(&afs_xvcache);
2119 UpgradeSToWLock(&afs_xvcache, 23);
2120 /* no cache entry, better grab one */
2121 tvc = afs_NewVCache(afid, NULL);
2123 afs_stats_cmperf.vcacheMisses++;
2127 afs_stats_cmperf.vcacheHits++;
2129 /* we already bumped the ref count in the for loop above */
2130 #else /* AFS_OSF_ENV */
2133 UpgradeSToWLock(&afs_xvcache, 24);
2134 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2135 refpanic("GRVC VLRU inconsistent0");
2137 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2138 refpanic("GRVC VLRU inconsistent1");
2140 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2141 refpanic("GRVC VLRU inconsistent2");
2143 QRemove(&tvc->vlruq); /* move to lruq head */
2144 QAdd(&VLRU, &tvc->vlruq);
2145 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2146 refpanic("GRVC VLRU inconsistent3");
2148 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2149 refpanic("GRVC VLRU inconsistent4");
2151 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2152 refpanic("GRVC VLRU inconsistent5");
2157 ReleaseWriteLock(&afs_xvcache);
2159 if (tvc->states & CStatd) {
2163 ObtainReadLock(&tvc->lock);
2164 tvc->states &= ~CUnique;
2165 tvc->callback = NULL; /* redundant, perhaps */
2166 ReleaseReadLock(&tvc->lock);
2169 ObtainWriteLock(&tvc->lock, 57);
2171 /* It is always appropriate to throw away all the access rights? */
2172 afs_FreeAllAxs(&(tvc->Access));
2175 tvc->states |= CForeign;
2176 if (tvolp->states & VRO)
2178 if (tvolp->states & VBackup)
2179 tvc->states |= CBackup;
2180 /* now copy ".." entry back out of volume structure, if necessary */
2181 if (newvcache && (tvolp->rootVnode == afid->Fid.Vnode)
2182 && (tvolp->rootUnique == afid->Fid.Unique)) {
2185 if (tvc->mvstat == 2 && tvolp->dotdot.Fid.Volume != 0) {
2187 tvc->mvid = (struct VenusFid *)
2188 osi_AllocSmallSpace(sizeof(struct VenusFid));
2189 *tvc->mvid = tvolp->dotdot;
2193 afs_RemoveVCB(afid);
2196 struct VenusFid tfid;
2199 tfid.Fid.Vnode = 0; /* Means get rootfid of volume */
2200 origCBs = afs_allCBs; /* ignore InitCallBackState */
2202 afs_RemoteLookup(&tfid, areq, NULL, &nfid, &OutStatus, &CallBack,
2207 ObtainWriteLock(&afs_xcbhash, 467);
2208 afs_DequeueCallback(tvc);
2209 tvc->callback = NULL;
2210 tvc->states &= ~(CStatd | CUnique);
2211 ReleaseWriteLock(&afs_xcbhash);
2212 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2213 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2214 ReleaseWriteLock(&tvc->lock);
2215 ObtainReadLock(&afs_xvcache);
2217 ReleaseReadLock(&afs_xvcache);
2221 ObtainWriteLock(&afs_xcbhash, 468);
2222 if (origCBs == afs_allCBs) {
2223 tvc->states |= CTruth;
2224 tvc->callback = serverp;
2225 if (CallBack.ExpirationTime != 0) {
2226 tvc->cbExpires = CallBack.ExpirationTime + start;
2227 tvc->states |= CStatd;
2228 tvc->states &= ~CBulkFetching;
2229 afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime), tvolp);
2230 } else if (tvc->states & CRO) {
2231 /* adapt gives us an hour. */
2232 tvc->cbExpires = 3600 + osi_Time();
2233 /*XXX*/ tvc->states |= CStatd;
2234 tvc->states &= ~CBulkFetching;
2235 afs_QueueCallback(tvc, CBHash(3600), tvolp);
2238 afs_DequeueCallback(tvc);
2239 tvc->callback = NULL;
2240 tvc->states &= ~(CStatd | CUnique);
2241 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2242 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2244 ReleaseWriteLock(&afs_xcbhash);
2245 afs_ProcessFS(tvc, &OutStatus, areq);
2247 ReleaseWriteLock(&tvc->lock);
2254 * must be called with avc write-locked
2255 * don't absolutely have to invalidate the hint unless the dv has
2256 * changed, but be sure to get it right else there will be consistency bugs.
2259 afs_FetchStatus(struct vcache * avc, struct VenusFid * afid,
2260 struct vrequest * areq, struct AFSFetchStatus * Outsp)
2263 afs_uint32 start = 0;
2264 register struct conn *tc;
2265 struct AFSCallBack CallBack;
2266 struct AFSVolSync tsync;
2267 struct volume *volp;
2270 tc = afs_Conn(afid, areq, SHARED_LOCK);
2271 avc->quick.stamp = 0;
2272 avc->h1.dchint = NULL; /* invalidate hints */
2274 avc->callback = tc->srvr->server;
2276 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_FETCHSTATUS);
2279 RXAFS_FetchStatus(tc->id, (struct AFSFid *)&afid->Fid, Outsp,
2287 } while (afs_Analyze
2288 (tc, code, afid, areq, AFS_STATS_FS_RPCIDX_FETCHSTATUS,
2289 SHARED_LOCK, NULL));
2292 afs_ProcessFS(avc, Outsp, areq);
2293 volp = afs_GetVolume(afid, areq, READ_LOCK);
2294 ObtainWriteLock(&afs_xcbhash, 469);
2295 avc->states |= CTruth;
2296 if (avc->callback /* check for race */ ) {
2297 if (CallBack.ExpirationTime != 0) {
2298 avc->cbExpires = CallBack.ExpirationTime + start;
2299 avc->states |= CStatd;
2300 avc->states &= ~CBulkFetching;
2301 afs_QueueCallback(avc, CBHash(CallBack.ExpirationTime), volp);
2302 } else if (avc->states & CRO) { /* ordinary callback on a read-only volume -- AFS 3.2 style */
2303 avc->cbExpires = 3600 + start;
2304 avc->states |= CStatd;
2305 avc->states &= ~CBulkFetching;
2306 afs_QueueCallback(avc, CBHash(3600), volp);
2308 afs_DequeueCallback(avc);
2309 avc->callback = NULL;
2310 avc->states &= ~(CStatd | CUnique);
2311 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
2312 osi_dnlc_purgedp(avc); /* if it (could be) a directory */
2315 afs_DequeueCallback(avc);
2316 avc->callback = NULL;
2317 avc->states &= ~(CStatd | CUnique);
2318 if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
2319 osi_dnlc_purgedp(avc); /* if it (could be) a directory */
2321 ReleaseWriteLock(&afs_xcbhash);
2323 afs_PutVolume(volp, READ_LOCK);
2325 /* used to undo the local callback, but that's too extreme.
2326 * There are plenty of good reasons that fetchstatus might return
2327 * an error, such as EPERM. If we have the vnode cached, statd,
2328 * with callback, might as well keep track of the fact that we
2329 * don't have access...
2331 if (code == EPERM || code == EACCES) {
2332 struct axscache *ac;
2333 if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)))
2335 else /* not found, add a new one if possible */
2336 afs_AddAxs(avc->Access, areq->uid, 0);
2347 * Stuff some information into the vcache for the given file.
2350 * afid : File in question.
2351 * OutStatus : Fetch status on the file.
2352 * CallBack : Callback info.
2353 * tc : RPC connection involved.
2354 * areq : vrequest involved.
2357 * Nothing interesting.
2360 afs_StuffVcache(register struct VenusFid *afid,
2361 struct AFSFetchStatus *OutStatus,
2362 struct AFSCallBack *CallBack, register struct conn *tc,
2363 struct vrequest *areq)
2365 register afs_int32 code, i, newvcache = 0;
2366 register struct vcache *tvc;
2367 struct AFSVolSync tsync;
2369 struct axscache *ac;
2372 AFS_STATCNT(afs_StuffVcache);
2373 #ifdef IFS_VCACHECOUNT
2378 ObtainSharedLock(&afs_xvcache, 8);
2380 tvc = afs_FindVCache(afid, &retry, DO_VLRU /* no stats */ );
2382 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2383 ReleaseSharedLock(&afs_xvcache);
2384 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2390 /* no cache entry, better grab one */
2391 UpgradeSToWLock(&afs_xvcache, 25);
2392 tvc = afs_NewVCache(afid, NULL);
2394 ConvertWToSLock(&afs_xvcache);
2397 ReleaseSharedLock(&afs_xvcache);
2398 ObtainWriteLock(&tvc->lock, 58);
2400 tvc->states &= ~CStatd;
2401 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2402 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2404 /* Is it always appropriate to throw away all the access rights? */
2405 afs_FreeAllAxs(&(tvc->Access));
2407 /*Copy useful per-volume info */
2408 tvp = afs_GetVolume(afid, areq, READ_LOCK);
2410 if (newvcache && (tvp->states & VForeign))
2411 tvc->states |= CForeign;
2412 if (tvp->states & VRO)
2414 if (tvp->states & VBackup)
2415 tvc->states |= CBackup;
2417 * Now, copy ".." entry back out of volume structure, if
2420 if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
2422 tvc->mvid = (struct VenusFid *)
2423 osi_AllocSmallSpace(sizeof(struct VenusFid));
2424 *tvc->mvid = tvp->dotdot;
2427 /* store the stat on the file */
2428 afs_RemoveVCB(afid);
2429 afs_ProcessFS(tvc, OutStatus, areq);
2430 tvc->callback = tc->srvr->server;
2432 /* we use osi_Time twice below. Ideally, we would use the time at which
2433 * the FetchStatus call began, instead, but we don't have it here. So we
2434 * make do with "now". In the CRO case, it doesn't really matter. In
2435 * the other case, we hope that the difference between "now" and when the
2436 * call actually began execution on the server won't be larger than the
2437 * padding which the server keeps. Subtract 1 second anyway, to be on
2438 * the safe side. Can't subtract more because we don't know how big
2439 * ExpirationTime is. Possible consistency problems may arise if the call
2440 * timeout period becomes longer than the server's expiration padding. */
2441 ObtainWriteLock(&afs_xcbhash, 470);
2442 if (CallBack->ExpirationTime != 0) {
2443 tvc->cbExpires = CallBack->ExpirationTime + osi_Time() - 1;
2444 tvc->states |= CStatd;
2445 tvc->states &= ~CBulkFetching;
2446 afs_QueueCallback(tvc, CBHash(CallBack->ExpirationTime), tvp);
2447 } else if (tvc->states & CRO) {
2448 /* old-fashioned AFS 3.2 style */
2449 tvc->cbExpires = 3600 + osi_Time();
2450 /*XXX*/ tvc->states |= CStatd;
2451 tvc->states &= ~CBulkFetching;
2452 afs_QueueCallback(tvc, CBHash(3600), tvp);
2454 afs_DequeueCallback(tvc);
2455 tvc->callback = NULL;
2456 tvc->states &= ~(CStatd | CUnique);
2457 if ((tvc->states & CForeign) || (tvc->fid.Fid.Vnode & 1))
2458 osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
2460 ReleaseWriteLock(&afs_xcbhash);
2462 afs_PutVolume(tvp, READ_LOCK);
2464 /* look in per-pag cache */
2465 if (tvc->Access && (ac = afs_FindAxs(tvc->Access, areq->uid)))
2466 ac->axess = OutStatus->CallerAccess; /* substitute pags */
2467 else /* not found, add a new one if possible */
2468 afs_AddAxs(tvc->Access, areq->uid, OutStatus->CallerAccess);
2470 ReleaseWriteLock(&tvc->lock);
2471 afs_Trace4(afs_iclSetp, CM_TRACE_STUFFVCACHE, ICL_TYPE_POINTER, tvc,
2472 ICL_TYPE_POINTER, tvc->callback, ICL_TYPE_INT32,
2473 tvc->cbExpires, ICL_TYPE_INT32, tvc->cbExpires - osi_Time());
2475 * Release ref count... hope this guy stays around...
2478 } /*afs_StuffVcache */
2485 * Decrements the reference count on a cache entry.
2488 * avc : Pointer to the cache entry to decrement.
2491 * Nothing interesting.
2494 afs_PutVCache(register struct vcache *avc)
2496 AFS_STATCNT(afs_PutVCache);
2498 * Can we use a read lock here?
2500 ObtainReadLock(&afs_xvcache);
2502 ReleaseReadLock(&afs_xvcache);
2503 } /*afs_PutVCache */
2509 * Find a vcache entry given a fid.
2512 * afid : Pointer to the fid whose cache entry we desire.
2513 * retry: (SGI-specific) tell the caller to drop the lock on xvcache,
2514 * unlock the vnode, and try again.
2515 * flags: bit 1 to specify whether to compute hit statistics. Not
2516 * set if FindVCache is called as part of internal bookkeeping.
2519 * Must be called with the afs_xvcache lock at least held at
2520 * the read level. In order to do the VLRU adjustment, the xvcache lock
2521 * must be shared-- we upgrade it here.
2525 afs_FindVCache(struct VenusFid *afid, afs_int32 * retry, afs_int32 flag)
2528 register struct vcache *tvc;
2531 AFS_STATCNT(afs_FindVCache);
2534 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2535 if (FidMatches(afid, tvc)) {
2537 /* Grab this vnode, possibly reactivating from the free list */
2540 vg = vget(AFSTOV(tvc));
2544 #endif /* AFS_OSF_ENV */
2549 /* should I have a read lock on the vnode here? */
2553 #if !defined(AFS_OSF_ENV)
2554 osi_vnhold(tvc, retry); /* already held, above */
2555 if (retry && *retry)
2559 * only move to front of vlru if we have proper vcache locking)
2561 if (flag & DO_VLRU) {
2562 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2563 refpanic("FindVC VLRU inconsistent1");
2565 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2566 refpanic("FindVC VLRU inconsistent1");
2568 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2569 refpanic("FindVC VLRU inconsistent2");
2571 UpgradeSToWLock(&afs_xvcache, 26);
2572 QRemove(&tvc->vlruq);
2573 QAdd(&VLRU, &tvc->vlruq);
2574 ConvertWToSLock(&afs_xvcache);
2575 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2576 refpanic("FindVC VLRU inconsistent1");
2578 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2579 refpanic("FindVC VLRU inconsistent2");
2581 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2582 refpanic("FindVC VLRU inconsistent3");
2588 if (flag & DO_STATS) {
2590 afs_stats_cmperf.vcacheHits++;
2592 afs_stats_cmperf.vcacheMisses++;
2593 if (afs_IsPrimaryCellNum(afid->Cell))
2594 afs_stats_cmperf.vlocalAccesses++;
2596 afs_stats_cmperf.vremoteAccesses++;
2598 #ifdef AFS_LINUX22_ENV
2599 if (tvc && (tvc->states & CStatd))
2600 vcache2inode(tvc); /* mainly to reset i_nlink */
2602 #ifdef AFS_DARWIN_ENV
2604 osi_VM_Setup(tvc, 0);
2607 } /*afs_FindVCache */
2613 * Find a vcache entry given a fid. Does a wildcard match on what we
2614 * have for the fid. If more than one entry, don't return anything.
2617 * avcp : Fill in pointer if we found one and only one.
2618 * afid : Pointer to the fid whose cache entry we desire.
2619 * retry: (SGI-specific) tell the caller to drop the lock on xvcache,
2620 * unlock the vnode, and try again.
2621 * flags: bit 1 to specify whether to compute hit statistics. Not
2622 * set if FindVCache is called as part of internal bookkeeping.
2625 * Must be called with the afs_xvcache lock at least held at
2626 * the read level. In order to do the VLRU adjustment, the xvcache lock
2627 * must be shared-- we upgrade it here.
2630 * number of matches found.
2633 int afs_duplicate_nfs_fids = 0;
2636 afs_NFSFindVCache(struct vcache **avcp, struct VenusFid *afid)
2638 register struct vcache *tvc;
2640 afs_int32 count = 0;
2641 struct vcache *found_tvc = NULL;
2643 AFS_STATCNT(afs_FindVCache);
2645 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2649 ObtainSharedLock(&afs_xvcache, 331);
2652 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2653 /* Match only on what we have.... */
2654 if (((tvc->fid.Fid.Vnode & 0xffff) == afid->Fid.Vnode)
2655 && (tvc->fid.Fid.Volume == afid->Fid.Volume)
2656 && ((tvc->fid.Fid.Unique & 0xffffff) == afid->Fid.Unique)
2657 && (tvc->fid.Cell == afid->Cell)) {
2659 /* Grab this vnode, possibly reactivating from the free list */
2662 vg = vget(AFSTOV(tvc));
2665 /* This vnode no longer exists. */
2668 #endif /* AFS_OSF_ENV */
2673 /* Drop our reference counts. */
2675 vrele(AFSTOV(found_tvc));
2677 afs_duplicate_nfs_fids++;
2678 ReleaseSharedLock(&afs_xvcache);
2686 /* should I have a read lock on the vnode here? */
2688 #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
2689 afs_int32 retry = 0;
2690 osi_vnhold(tvc, &retry);
2693 found_tvc = (struct vcache *)0;
2694 ReleaseSharedLock(&afs_xvcache);
2695 spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
2699 #if !defined(AFS_OSF_ENV)
2700 osi_vnhold(tvc, (int *)0); /* already held, above */
2704 * We obtained the xvcache lock above.
2706 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2707 refpanic("FindVC VLRU inconsistent1");
2709 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2710 refpanic("FindVC VLRU inconsistent1");
2712 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2713 refpanic("FindVC VLRU inconsistent2");
2715 UpgradeSToWLock(&afs_xvcache, 568);
2716 QRemove(&tvc->vlruq);
2717 QAdd(&VLRU, &tvc->vlruq);
2718 ConvertWToSLock(&afs_xvcache);
2719 if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
2720 refpanic("FindVC VLRU inconsistent1");
2722 if (tvc->vlruq.next->prev != &(tvc->vlruq)) {
2723 refpanic("FindVC VLRU inconsistent2");
2725 if (tvc->vlruq.prev->next != &(tvc->vlruq)) {
2726 refpanic("FindVC VLRU inconsistent3");
2732 afs_stats_cmperf.vcacheHits++;
2734 afs_stats_cmperf.vcacheMisses++;
2735 if (afs_IsPrimaryCellNum(afid->Cell))
2736 afs_stats_cmperf.vlocalAccesses++;
2738 afs_stats_cmperf.vremoteAccesses++;
2740 *avcp = tvc; /* May be null */
2742 ReleaseSharedLock(&afs_xvcache);
2743 return (tvc ? 1 : 0);
2745 } /*afs_NFSFindVCache */
2753 * Initialize vcache related variables
2756 afs_vcacheInit(int astatSize)
2758 register struct vcache *tvp;
2760 #if defined(AFS_OSF_ENV)
2761 if (!afs_maxvcount) {
2762 #if defined(AFS_OSF30_ENV)
2763 afs_maxvcount = max_vnodes / 2; /* limit ourselves to half the total */
2765 afs_maxvcount = nvnode / 2; /* limit ourselves to half the total */
2767 if (astatSize < afs_maxvcount) {
2768 afs_maxvcount = astatSize;
2771 #else /* AFS_OSF_ENV */
2775 RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
2776 LOCK_INIT(&afs_xvcb, "afs_xvcb");
2778 #if !defined(AFS_OSF_ENV)
2779 #ifdef AFS_LINUX26_ENV
2780 printf("old style would have needed %d contiguous bytes\n", astatSize *
2781 sizeof(struct vcache));
2782 Initial_freeVCList = freeVCList = tvp = (struct vcache *)
2783 afs_osi_Alloc(sizeof(struct vcache));
2784 for (i = 0; i < astatSize; i++) {
2785 tvp->nextfree = (struct vcache *) afs_osi_Alloc(sizeof(struct vcache));
2786 tvp = tvp->nextfree;
2788 tvp->nextfree = NULL;
2790 /* Allocate and thread the struct vcache entries */
2791 tvp = (struct vcache *)afs_osi_Alloc(astatSize * sizeof(struct vcache));
2792 memset((char *)tvp, 0, sizeof(struct vcache) * astatSize);
2794 Initial_freeVCList = tvp;
2795 freeVCList = &(tvp[0]);
2796 for (i = 0; i < astatSize - 1; i++) {
2797 tvp[i].nextfree = &(tvp[i + 1]);
2799 tvp[astatSize - 1].nextfree = NULL;
2800 #ifdef KERNEL_HAVE_PIN
2801 pin((char *)tvp, astatSize * sizeof(struct vcache)); /* XXX */
2806 #if defined(AFS_SGI_ENV)
2807 for (i = 0; i < astatSize; i++) {
2808 char name[METER_NAMSZ];
2809 struct vcache *tvc = &tvp[i];
2811 tvc->v.v_number = ++afsvnumbers;
2812 tvc->vc_rwlockid = OSI_NO_LOCKID;
2813 initnsema(&tvc->vc_rwlock, 1,
2814 makesname(name, "vrw", tvc->v.v_number));
2815 #ifndef AFS_SGI53_ENV
2816 initnsema(&tvc->v.v_sync, 0, makesname(name, "vsy", tvc->v.v_number));
2818 #ifndef AFS_SGI62_ENV
2819 initnlock(&tvc->v.v_lock, makesname(name, "vlk", tvc->v.v_number));
2820 #endif /* AFS_SGI62_ENV */
2834 shutdown_vcache(void)
2837 struct afs_cbr *tsp, *nsp;
2839 * XXX We may potentially miss some of the vcaches because if when there're no
2840 * free vcache entries and all the vcache entries are active ones then we allocate
2841 * an additional one - admittedly we almost never had that occur.
2845 register struct afs_q *tq, *uq;
2846 register struct vcache *tvc;
2847 for (tq = VLRU.prev; tq != &VLRU; tq = uq) {
2851 osi_FreeSmallSpace(tvc->mvid);
2852 tvc->mvid = (struct VenusFid *)0;
2855 aix_gnode_rele(AFSTOV(tvc));
2857 if (tvc->linkData) {
2858 afs_osi_Free(tvc->linkData, strlen(tvc->linkData) + 1);
2863 * Also free the remaining ones in the Cache
2865 for (i = 0; i < VCSIZE; i++) {
2866 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
2868 osi_FreeSmallSpace(tvc->mvid);
2869 tvc->mvid = (struct VenusFid *)0;
2873 afs_osi_Free(tvc->v.v_gnode, sizeof(struct gnode));
2874 #ifdef AFS_AIX32_ENV
2877 vms_delete(tvc->segid);
2879 tvc->segid = tvc->vmh = NULL;
2881 osi_Panic("flushVcache: vm race");
2889 #if defined(AFS_SUN5_ENV)
2895 if (tvc->linkData) {
2896 afs_osi_Free(tvc->linkData, strlen(tvc->linkData) + 1);
2900 afs_FreeAllAxs(&(tvc->Access));
2906 * Free any leftover callback queue
2908 for (tsp = afs_cbrSpace; tsp; tsp = nsp) {
2910 afs_osi_Free((char *)tsp, AFS_NCBRS * sizeof(struct afs_cbr));
2914 #ifdef AFS_LINUX26_ENV
2916 struct vcache *tvp = Initial_freeVCList;
2918 struct vcache *next = tvp->nextfree;
2920 afs_osi_Free(tvp, sizeof(struct vcache));
2925 #ifdef KERNEL_HAVE_PIN
2926 unpin(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
2928 #if !defined(AFS_OSF_ENV)
2929 afs_osi_Free(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
2933 #if !defined(AFS_OSF_ENV)
2934 freeVCList = Initial_freeVCList = 0;
2936 RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
2937 LOCK_INIT(&afs_xvcb, "afs_xvcb");