* afs_WriteVCacheDiscon
* afs_SimpleVStat
* afs_ProcessFS
- * TellALittleWhiteLie
* afs_RemoteLookup
* afs_GetVCache
* afs_LookupVCache
/* Forward declarations */
static afs_int32 afs_QueueVCB(struct vcache *avc, int *slept);
+
+/*
+ * The PFlush algorithm makes use of the fact that Fid.Unique is not used in
+ * below hash algorithms. Change it if need be so that flushing algorithm
+ * doesn't move things from one hash chain to another.
+ */
+/* Don't hash on the cell; our callback-breaking code sometimes fails to compute
+ * the cell correctly, and only scans one hash bucket. */
+int VCHash(struct VenusFid *fid)
+{
+ return opr_jhash_int2(fid->Fid.Volume, fid->Fid.Vnode, 0) &
+ opr_jhash_mask(VCSIZEBITS);
+}
+/* Hash only on volume to speed up volume callbacks. */
+int VCHashV(struct VenusFid *fid)
+{
+ return opr_jhash_int(fid->Fid.Volume, 0) & opr_jhash_mask(VCSIZEBITS);
+}
+
/*!
* Generate an index into the hash table for a given Fid.
* \param fid
afs_int32 i, code;
struct vcache **uvc, *wvc;
+ /* NOTE: We must have nothing drop afs_xvcache until we have removed all
+ * possible references to this vcache. This means all hash tables, queues,
+ * DNLC, etc. */
+
*slept = 0;
AFS_STATCNT(afs_FlushVCache);
afs_Trace2(afs_iclSetp, CM_TRACE_FLUSHV, ICL_TYPE_POINTER, avc,
ICL_TYPE_INT32, avc->f.states);
- code = osi_VM_FlushVCache(avc, slept);
+ code = osi_VM_FlushVCache(avc);
if (code)
goto bad;
for (wvc = *uvc; wvc; uvc = &wvc->hnext, wvc = *uvc) {
if (avc == wvc) {
*uvc = avc->hnext;
- avc->hnext = (struct vcache *)NULL;
+ avc->hnext = NULL;
break;
}
}
/* remove entry from the volume hash table */
QRemove(&avc->vhashq);
- if (avc->mvid)
- osi_FreeSmallSpace(avc->mvid);
- avc->mvid = (struct VenusFid *)0;
+#if defined(AFS_LINUX26_ENV)
+ {
+ struct pagewriter *pw, *store;
+ struct list_head tofree;
+
+ INIT_LIST_HEAD(&tofree);
+ spin_lock(&avc->pagewriter_lock);
+ list_for_each_entry_safe(pw, store, &avc->pagewriters, link) {
+ list_del(&pw->link);
+ /* afs_osi_Free may sleep so we need to defer it */
+ list_add_tail(&pw->link, &tofree);
+ }
+ spin_unlock(&avc->pagewriter_lock);
+ list_for_each_entry_safe(pw, store, &tofree, link) {
+ list_del(&pw->link);
+ afs_osi_Free(pw, sizeof(struct pagewriter));
+ }
+ }
+#endif
+
+ if (avc->mvid.target_root)
+ osi_FreeSmallSpace(avc->mvid.target_root);
+ avc->mvid.target_root = NULL;
if (avc->linkData) {
afs_osi_Free(avc->linkData, strlen(avc->linkData) + 1);
avc->linkData = NULL;
AFSTOV(avc) = NULL; /* also drop the ptr to vnode */
}
#endif
-#ifdef AFS_SUN510_ENV
+
+#ifdef AFS_SUN511_ENV
+ if (avc->v) {
+ vn_free(avc->v);
+ avc->v = NULL;
+ }
+#elif defined(AFS_SUN510_ENV)
/* As we use private vnodes, cleanup is up to us */
vn_reinit(AFSTOV(avc));
#endif
afs_FreeAllAxs(&(avc->Access));
- if (!afs_shuttingdown)
+ afs_StaleVCacheFlags(avc, AFS_STALEVC_FILENAME, CUnique);
+
+ /* By this point, the vcache has been removed from all global structures
+ * via which someone could try to use the vcache. It is okay to drop
+ * afs_xvcache at this point (if *slept is set). */
+
+ if (afs_shuttingdown == AFS_RUNNING)
afs_QueueVCB(avc, slept);
- ObtainWriteLock(&afs_xcbhash, 460);
- afs_DequeueCallback(avc); /* remove it from queued callbacks list */
- avc->f.states &= ~(CStatd | CUnique);
- ReleaseWriteLock(&afs_xcbhash);
- if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
- osi_dnlc_purgedp(avc); /* if it (could be) a directory */
- else
- osi_dnlc_purgevp(avc);
/*
* Next, keep track of which vnodes we've deleted for create's
/* we can't keep trying to push back dirty data forever. Give up. */
afs_InvalidateAllSegments(avc); /* turns off dirty bit */
}
- avc->f.states &= ~CMAPPED; /* mainly used by SunOS 4.0.x */
+ avc->f.states &= ~CMAPPED;
avc->f.states &= ~CDirty; /* Turn it off */
if (avc->f.states & CUnlinked) {
if (CheckLock(&afs_xvcache) || CheckLock(&afs_xdcache)) {
}
static void
-FlushAllVCBs(struct rx_connection **rxconns, int nconns, int nservers,
- struct afs_conn **conns, struct srvAddr **addrs)
+FlushAllVCBs(int nconns, struct rx_connection **rxconns,
+ struct afs_conn **conns)
{
afs_int32 *results;
afs_int32 i;
- results = afs_osi_Alloc(nservers * sizeof (afs_int32));
+ results = afs_osi_Alloc(nconns * sizeof (afs_int32));
osi_Assert(results != NULL);
AFS_GUNLOCK();
for ( i = 0 ; i < nconns ; i++ ) {
if (results[i] == 0) {
/* Unchain all of them */
- while (addrs[i]->server->cbrs)
- afs_FreeCBR(addrs[i]->server->cbrs);
+ while (conns[i]->parent->srvr->server->cbrs)
+ afs_FreeCBR(conns[i]->parent->srvr->server->cbrs);
}
}
- afs_osi_Free(results, nservers * sizeof(afs_int32));
+ afs_osi_Free(results, nconns * sizeof(afs_int32));
}
/*!
int tcount;
struct server *tsp;
int i;
- struct vrequest treq;
+ struct vrequest *treq = NULL;
struct afs_conn *tc;
int safety1, safety2, safety3;
XSTATS_DECLS;
if (AFS_IS_DISCONNECTED)
return ENETDOWN;
- if ((code = afs_InitReq(&treq, afs_osi_credp)))
+ if ((code = afs_CreateReq(&treq, afs_osi_credp)))
return code;
- treq.flags |= O_NONBLOCK;
+ treq->flags |= O_NONBLOCK;
tfids = afs_osi_Alloc(sizeof(struct AFSFid) * AFS_MAXCBRSCALL);
osi_Assert(tfids != NULL);
callBacks[0].CallBackType = CB_EXCLUSIVE;
for (safety3 = 0; safety3 < AFS_MAXHOSTS * 2; safety3++) {
tc = afs_ConnByHost(tsp, tsp->cell->fsport,
- tsp->cell->cellNum, &treq, 0,
- SHARED_LOCK, &rxconn);
+ tsp->cell->cellNum, treq, 0,
+ SHARED_LOCK, 0, &rxconn);
if (tc) {
XSTATS_START_TIME
(AFS_STATS_FS_RPCIDX_GIVEUPCALLBACKS);
} else
code = -1;
if (!afs_Analyze
- (tc, rxconn, code, 0, &treq,
+ (tc, rxconn, code, 0, treq,
AFS_STATS_FS_RPCIDX_GIVEUPCALLBACKS, SHARED_LOCK,
tsp->cell)) {
break;
if (lockit)
ReleaseWriteLock(&afs_xvcb);
afs_osi_Free(tfids, sizeof(struct AFSFid) * AFS_MAXCBRSCALL);
+ afs_DestroyReq(treq);
return 0;
}
/*
* The proper value for mvstat (for root fids) is setup by the caller.
*/
- avc->mvstat = 0;
+ avc->mvstat = AFS_MVSTAT_FILE;
if (afid->Fid.Vnode == 1 && afid->Fid.Unique == 1)
- avc->mvstat = 2;
+ avc->mvstat = AFS_MVSTAT_ROOT;
if (afs_globalVFS == 0)
osi_Panic("afs globalvfs");
afs_ShakeLooseVCaches(afs_int32 anumber)
{
afs_int32 i, loop;
+ int evicted;
struct vcache *tvc;
struct afs_q *tq, *uq;
int fv_slept, defersleep = 0;
+ int limit;
afs_int32 target = anumber;
- i = 0;
loop = 0;
+
+ retry:
+ i = 0;
+ limit = afs_vcount;
for (tq = VLRU.prev; tq != &VLRU && anumber > 0; tq = uq) {
tvc = QTOV(tq);
uq = QPrev(tq);
if (tvc->f.states & CVFlushed) {
refpanic("CVFlushed on VLRU");
- /* In the other path, this was 2 * afs_cacheStats */
- } else if (!afsd_dynamic_vcaches && i++ > afs_maxvcount) {
- refpanic("Exceeded pool of AFS vnodes(VLRU cycle?)");
+ } else if (i++ > limit) {
+ afs_warn("afs_ShakeLooseVCaches: i %d limit %d afs_vcount %d afs_maxvcount %d\n",
+ (int)i, limit, (int)afs_vcount, (int)afs_maxvcount);
+ refpanic("Found too many AFS vnodes on VLRU (VLRU cycle?)");
} else if (QNext(uq) != tq) {
refpanic("VLRU inconsistent");
} else if (tvc->f.states & CVInit) {
}
fv_slept = 0;
- if (osi_TryEvictVCache(tvc, &fv_slept, defersleep))
+ evicted = osi_TryEvictVCache(tvc, &fv_slept, defersleep);
+ if (evicted) {
anumber--;
+ }
if (fv_slept) {
if (loop++ > 100)
break;
- uq = VLRU.prev;
- i = 0;
- continue; /* start over - may have raced. */
+ if (!evicted) {
+ /*
+ * This vcache was busy and we slept while trying to evict it.
+ * Move this busy vcache to the head of the VLRU so vcaches
+ * following this busy vcache can be evicted during the retry.
+ */
+ QRemove(&tvc->vlruq);
+ QAdd(&VLRU, &tvc->vlruq);
+ }
+ goto retry; /* start over - may have raced. */
}
- if (tq == uq) {
+ if (uq == &VLRU) {
if (anumber && !defersleep) {
defersleep = 1;
- tq = VLRU.prev;
- continue;
+ goto retry;
}
break;
}
struct server *serverp) {
afs_uint32 slot;
+ afs_hyper_t zero;
slot = avc->diskSlot;
osi_PrePopulateVCache(avc);
AFS_RWLOCK_INIT(&avc->lock, "vcache lock");
- avc->mvid = NULL;
+ memset(&avc->mvid, 0, sizeof(avc->mvid));
avc->linkData = NULL;
avc->cbExpires = 0;
avc->opens = 0;
hzero(avc->mapDV);
avc->f.truncPos = AFS_NOTRUNC; /* don't truncate until we need to */
- hzero(avc->f.m.DataVersion); /* in case we copy it into flushDV */
+ hzero(zero);
+ afs_SetDataVersion(avc, &zero); /* in case we copy it into flushDV */
avc->Access = NULL;
avc->callback = serverp; /* to minimize chance that clear
* request is lost */
nvc = tvc->hnext;
if (afs_FlushVCache(tvc, &slept)) {
- afs_warn("Failed to flush vcache 0x%lx\n", (unsigned long)(uintptr_t)tvc);
+ afs_warn("Failed to flush vcache 0x%lx\n", (unsigned long)(uintptrsz)tvc);
}
if (slept) {
goto retry;
}
- tvc = nvc;
}
}
struct afs_conn *tc;
afs_int32 code;
afs_ucred_t *cred = NULL;
- struct vrequest treq, ureq;
+ struct vrequest *treq = NULL;
struct AFSVolSync tsync;
int didCore;
XSTATS_DECLS;
AFS_STATCNT(afs_FlushActiveVcaches);
+
+ code = afs_CreateReq(&treq, afs_osi_credp);
+ if (code) {
+ afs_warn("unable to alloc treq\n");
+ return;
+ }
+
ObtainReadLock(&afs_xvcache);
for (i = 0; i < VCSIZE; i++) {
for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
ReleaseReadLock(&afs_xvcache);
ObtainWriteLock(&tvc->lock, 51);
do {
- afs_InitReq(&treq, afs_osi_credp);
- treq.flags |= O_NONBLOCK;
+ code = afs_InitReq(treq, afs_osi_credp);
+ if (code) {
+ code = -1;
+ break; /* shutting down: do not try to extend the lock */
+ }
+ treq->flags |= O_NONBLOCK;
- tc = afs_Conn(&tvc->f.fid, &treq, SHARED_LOCK, &rxconn);
+ tc = afs_Conn(&tvc->f.fid, treq, SHARED_LOCK, &rxconn);
if (tc) {
XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_EXTENDLOCK);
RX_AFS_GUNLOCK();
} else
code = -1;
} while (afs_Analyze
- (tc, rxconn, code, &tvc->f.fid, &treq,
+ (tc, rxconn, code, &tvc->f.fid, treq,
AFS_STATS_FS_RPCIDX_EXTENDLOCK, SHARED_LOCK, NULL));
ReleaseWriteLock(&tvc->lock);
*/
osi_vnhold(tvc, 0);
ReleaseReadLock(&afs_xvcache);
-#ifdef AFS_BOZONLOCK_ENV
- afs_BozonLock(&tvc->pvnLock, tvc);
-#endif
#if defined(AFS_SGI_ENV)
/*
* That's because if we come in via the CUnlinkedDel bit state path we'll be have 0 refcnt
/* XXXX Find better place-holder for cred XXXX */
cred = (afs_ucred_t *)tvc->linkData;
tvc->linkData = NULL; /* XXX */
- afs_InitReq(&ureq, cred);
+ code = afs_InitReq(treq, cred);
afs_Trace2(afs_iclSetp, CM_TRACE_ACTCCORE,
ICL_TYPE_POINTER, tvc, ICL_TYPE_INT32,
tvc->execsOrWriters);
- code = afs_StoreOnLastReference(tvc, &ureq);
+ if (!code) { /* avoid store when shutting down */
+ code = afs_StoreOnLastReference(tvc, treq);
+ }
ReleaseWriteLock(&tvc->lock);
-#ifdef AFS_BOZONLOCK_ENV
- afs_BozonUnlock(&tvc->pvnLock, tvc);
-#endif
hzero(tvc->flushDV);
osi_FlushText(tvc);
didCore = 1;
* Ignore errors
*/
ReleaseWriteLock(&tvc->lock);
-#ifdef AFS_BOZONLOCK_ENV
- afs_BozonUnlock(&tvc->pvnLock, tvc);
-#endif
#if defined(AFS_SGI_ENV)
AFS_RWUNLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
#endif
} else {
/* lost (or won, perhaps) the race condition */
ReleaseWriteLock(&tvc->lock);
-#ifdef AFS_BOZONLOCK_ENV
- afs_BozonUnlock(&tvc->pvnLock, tvc);
-#endif
}
#if defined(AFS_SGI_ENV)
AFS_RWUNLOCK((vnode_t *) tvc, VRWLOCK_WRITE);
}
}
ReleaseReadLock(&afs_xvcache);
+ afs_DestroyReq(treq);
}
ReleaseWriteLock(&avc->lock);
return 0;
}
- ObtainWriteLock(&afs_xcbhash, 461);
- avc->f.states &= ~(CStatd | CUnique);
- avc->callback = NULL;
- afs_DequeueCallback(avc);
- ReleaseWriteLock(&afs_xcbhash);
+ afs_StaleVCacheFlags(avc, AFS_STALEVC_FILENAME | AFS_STALEVC_CLEARCB,
+ CUnique);
ReleaseWriteLock(&avc->lock);
- /* since we've been called back, or the callback has expired,
- * it's possible that the contents of this directory, or this
- * file's name have changed, thus invalidating the dnlc contents.
- */
- if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
- osi_dnlc_purgedp(avc);
- else
- osi_dnlc_purgevp(avc);
-
/* fetch the status info */
- tvc = afs_GetVCache(&avc->f.fid, areq, NULL, avc);
+ tvc = afs_GetVCache(&avc->f.fid, areq);
if (!tvc)
- return ENOENT;
+ return EIO;
/* Put it back; caller has already incremented vrefCount */
afs_PutVCache(tvc);
return 0;
} else if (vType(avc) == VLNK) {
avc->f.m.Mode |= S_IFLNK;
if ((avc->f.m.Mode & 0111) == 0)
- avc->mvstat = 1;
+ avc->mvstat = AFS_MVSTAT_MTPT;
}
if (avc->f.states & CForeign) {
struct axscache *ac;
avc->f.m.Date = OutStatus.ClientModTime;
} else {
/* failure, set up to check with server next time */
- ObtainWriteLock(&afs_xcbhash, 462);
- afs_DequeueCallback(avc);
- avc->f.states &= ~(CStatd | CUnique); /* turn off stat valid flag */
- ReleaseWriteLock(&afs_xcbhash);
- if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
- osi_dnlc_purgedp(avc); /* if it (could be) a directory */
+ afs_StaleVCacheFlags(avc, 0, CUnique);
}
ConvertWToSLock(&avc->lock);
return code;
} else if (vType(avc) == VLNK) {
avc->f.m.Mode |= S_IFLNK;
if ((avc->f.m.Mode & 0111) == 0)
- avc->mvstat = 1;
+ avc->mvstat = AFS_MVSTAT_MTPT;
}
#endif
flags |= VDisconSetMode;
struct AFSFetchStatus *astat, struct vrequest *areq)
{
afs_size_t length;
+ afs_hyper_t newDV;
AFS_STATCNT(afs_ProcessFS);
#ifdef AFS_64BIT_CLIENT
avc->f.m.Length = length;
avc->f.m.Date = astat->ClientModTime;
}
- hset64(avc->f.m.DataVersion, astat->dataVersionHigh, astat->DataVersion);
+ hset64(newDV, astat->dataVersionHigh, astat->DataVersion);
+ afs_SetDataVersion(avc, &newDV);
avc->f.m.Owner = astat->Owner;
avc->f.m.Mode = astat->UnixModeBits;
avc->f.m.Group = astat->Group;
avc->f.m.Mode |= S_IFLNK;
}
if ((avc->f.m.Mode & 0111) == 0) {
- avc->mvstat = 1;
+ avc->mvstat = AFS_MVSTAT_MTPT;
}
}
avc->f.anyAccess = astat->AnonymousAccess;
* \param afid File ID.
* \param areq Ptr to associated vrequest structure, specifying the
* user whose authentication tokens will be used.
- * \param avc Caller may already have a vcache for this file, which is
- * already held.
*
* \note Environment:
* The cache entry is returned with an increased vrefCount field.
* locking directories in a constant order.
*
* \note NB. NewVCache -> FlushVCache presently (4/10/95) drops the xvcache lock.
- *
- * \note Might have a vcache structure already, which must
- * already be held by the caller
*/
struct vcache *
-afs_GetVCache(struct VenusFid *afid, struct vrequest *areq,
- afs_int32 * cached, struct vcache *avc)
+afs_GetVCache(struct VenusFid *afid, struct vrequest *areq)
{
afs_int32 code, newvcache = 0;
AFS_STATCNT(afs_GetVCache);
- if (cached)
- *cached = 0; /* Init just in case */
-
#if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
loop:
#endif
#endif
}
if (tvc) {
- if (cached)
- *cached = 1;
osi_Assert((tvc->f.states & CVInit) == 0);
/* If we are in readdir, return the vnode even if not statd */
if ((tvc->f.states & CStatd) || afs_InReadDir(tvc)) {
#endif
#endif
- ObtainWriteLock(&afs_xcbhash, 464);
- tvc->f.states &= ~CUnique;
- tvc->callback = 0;
- afs_DequeueCallback(tvc);
- ReleaseWriteLock(&afs_xcbhash);
+ afs_StaleVCacheFlags(tvc, AFS_STALEVC_NODNLC | AFS_STALEVC_CLEARCB,
+ CUnique);
/* It is always appropriate to throw away all the access rights? */
afs_FreeAllAxs(&(tvc->Access));
tvc->f.states |= CForeign;
if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
&& (tvp->rootUnique == afid->Fid.Unique)) {
- tvc->mvstat = 2;
+ tvc->mvstat = AFS_MVSTAT_ROOT;
}
}
if (tvp->states & VRO)
if (tvp->states & VBackup)
tvc->f.states |= CBackup;
/* now copy ".." entry back out of volume structure, if necessary */
- if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
- if (!tvc->mvid)
- tvc->mvid = (struct VenusFid *)
+ if (tvc->mvstat == AFS_MVSTAT_ROOT && tvp->dotdot.Fid.Volume != 0) {
+ if (!tvc->mvid.parent)
+ tvc->mvid.parent = (struct VenusFid *)
osi_AllocSmallSpace(sizeof(struct VenusFid));
- *tvc->mvid = tvp->dotdot;
+ *tvc->mvid.parent = tvp->dotdot;
}
afs_PutVolume(tvp, READ_LOCK);
}
*
* \param afid
* \param areq
- * \param cached Is element cached? If NULL, don't answer.
* \param adp
* \param aname
*
*/
struct vcache *
afs_LookupVCache(struct VenusFid *afid, struct vrequest *areq,
- afs_int32 * cached, struct vcache *adp, char *aname)
+ struct vcache *adp, char *aname)
{
afs_int32 code, now, newvcache = 0;
struct VenusFid nfid;
afs_int32 retry;
AFS_STATCNT(afs_GetVCache);
- if (cached)
- *cached = 0; /* Init just in case */
#if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
loop1:
ObtainReadLock(&tvc->lock);
if (tvc->f.states & CStatd) {
- if (cached) {
- *cached = 1;
- }
ReleaseReadLock(&tvc->lock);
return tvc;
}
tvc->f.states |= CForeign;
if (newvcache && (tvp->rootVnode == afid->Fid.Vnode)
&& (tvp->rootUnique == afid->Fid.Unique))
- tvc->mvstat = 2;
+ tvc->mvstat = AFS_MVSTAT_ROOT;
}
if (tvp->states & VRO)
tvc->f.states |= CRO;
if (tvp->states & VBackup)
tvc->f.states |= CBackup;
/* now copy ".." entry back out of volume structure, if necessary */
- if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
- if (!tvc->mvid)
- tvc->mvid = (struct VenusFid *)
+ if (tvc->mvstat == AFS_MVSTAT_ROOT && tvp->dotdot.Fid.Volume != 0) {
+ if (!tvc->mvid.parent)
+ tvc->mvid.parent = (struct VenusFid *)
osi_AllocSmallSpace(sizeof(struct VenusFid));
- *tvc->mvid = tvp->dotdot;
+ *tvc->mvid.parent = tvp->dotdot;
}
}
if (code) {
- ObtainWriteLock(&afs_xcbhash, 465);
- afs_DequeueCallback(tvc);
- tvc->f.states &= ~(CStatd | CUnique);
- ReleaseWriteLock(&afs_xcbhash);
- if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
- osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
+ afs_StaleVCacheFlags(tvc, 0, CUnique);
if (tvp)
afs_PutVolume(tvp, READ_LOCK);
ReleaseWriteLock(&tvc->lock);
tvc->f.states &= ~CBulkFetching;
afs_QueueCallback(tvc, CBHash(3600), tvp);
} else {
- tvc->callback = NULL;
- afs_DequeueCallback(tvc);
- tvc->f.states &= ~(CStatd | CUnique);
- if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
- osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
+ afs_StaleVCacheFlags(tvc,
+ AFS_STALEVC_CBLOCKED | AFS_STALEVC_CLEARCB,
+ CUnique);
}
} else {
- afs_DequeueCallback(tvc);
- tvc->f.states &= ~CStatd;
- tvc->f.states &= ~CUnique;
- tvc->callback = NULL;
- if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
- osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
+ afs_StaleVCacheFlags(tvc,
+ AFS_STALEVC_CBLOCKED | AFS_STALEVC_CLEARCB,
+ CUnique);
}
ReleaseWriteLock(&afs_xcbhash);
if (tvp)
struct vcache *
afs_GetRootVCache(struct VenusFid *afid, struct vrequest *areq,
- afs_int32 * cached, struct volume *tvolp)
+ struct volume *tvolp)
{
afs_int32 code = 0, i, newvcache = 0, haveStatus = 0;
afs_int32 getNewFid = 0;
}
#ifdef AFS_DARWIN80_ENV
if (tvc->f.states & CDeadVnode) {
- if (!(tvc->f.states & CBulkFetching)) {
- ReleaseSharedLock(&afs_xvcache);
- afs_osi_Sleep(&tvc->f.states);
- goto rootvc_loop;
- }
+ ReleaseSharedLock(&afs_xvcache);
+ afs_osi_Sleep(&tvc->f.states);
+ goto rootvc_loop;
}
tvp = AFSTOV(tvc);
if (vnode_get(tvp)) /* this bumps ref count */
AFS_GLOCK();
continue;
}
- if (tvc->f.states & (CBulkFetching|CDeadVnode)) {
- AFS_GUNLOCK();
- vnode_recycle(AFSTOV(tvc));
- AFS_GLOCK();
- }
#endif
break;
}
newvcache = 1;
afs_stats_cmperf.vcacheMisses++;
} else {
- if (cached)
- *cached = 1;
afs_stats_cmperf.vcacheHits++;
#if defined(AFS_DARWIN80_ENV)
/* we already bumped the ref count in the for loop above */
/* now copy ".." entry back out of volume structure, if necessary */
if (newvcache && (tvolp->rootVnode == afid->Fid.Vnode)
&& (tvolp->rootUnique == afid->Fid.Unique)) {
- tvc->mvstat = 2;
+ tvc->mvstat = AFS_MVSTAT_ROOT;
}
- if (tvc->mvstat == 2 && tvolp->dotdot.Fid.Volume != 0) {
- if (!tvc->mvid)
- tvc->mvid = (struct VenusFid *)
+ if (tvc->mvstat == AFS_MVSTAT_ROOT && tvolp->dotdot.Fid.Volume != 0) {
+ if (!tvc->mvid.parent)
+ tvc->mvid.parent = (struct VenusFid *)
osi_AllocSmallSpace(sizeof(struct VenusFid));
- *tvc->mvid = tvolp->dotdot;
+ *tvc->mvid.parent = tvolp->dotdot;
}
/* stat the file */
}
if (code) {
- ObtainWriteLock(&afs_xcbhash, 467);
- afs_DequeueCallback(tvc);
- tvc->callback = NULL;
- tvc->f.states &= ~(CStatd | CUnique);
- ReleaseWriteLock(&afs_xcbhash);
- if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
- osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
+ afs_StaleVCacheFlags(tvc, AFS_STALEVC_CLEARCB, CUnique);
ReleaseWriteLock(&tvc->lock);
afs_PutVCache(tvc);
return NULL;
afs_QueueCallback(tvc, CBHash(3600), tvolp);
}
} else {
- afs_DequeueCallback(tvc);
- tvc->callback = NULL;
- tvc->f.states &= ~(CStatd | CUnique);
- if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
- osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
+ afs_StaleVCacheFlags(tvc, AFS_STALEVC_CBLOCKED | AFS_STALEVC_CLEARCB,
+ CUnique);
}
ReleaseWriteLock(&afs_xcbhash);
afs_ProcessFS(tvc, &OutStatus, areq);
avc->f.states &= ~CBulkFetching;
afs_QueueCallback(avc, CBHash(3600), volp);
} else {
- afs_DequeueCallback(avc);
- avc->callback = NULL;
- avc->f.states &= ~(CStatd | CUnique);
- if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
- osi_dnlc_purgedp(avc); /* if it (could be) a directory */
+ afs_StaleVCacheFlags(avc,
+ AFS_STALEVC_CBLOCKED | AFS_STALEVC_CLEARCB,
+ CUnique);
}
} else {
- afs_DequeueCallback(avc);
- avc->callback = NULL;
- avc->f.states &= ~(CStatd | CUnique);
- if ((avc->f.states & CForeign) || (avc->f.fid.Fid.Vnode & 1))
- osi_dnlc_purgedp(avc); /* if it (could be) a directory */
+ afs_StaleVCacheFlags(avc, AFS_STALEVC_CBLOCKED | AFS_STALEVC_CLEARCB,
+ CUnique);
}
ReleaseWriteLock(&afs_xcbhash);
if (volp)
afs_PutVolume(volp, READ_LOCK);
}
+void
+afs_BadFetchStatus(struct afs_conn *tc)
+{
+ int addr = ntohl(tc->parent->srvr->sa_ip);
+ afs_warn("afs: Invalid AFSFetchStatus from server %u.%u.%u.%u\n",
+ (addr >> 24) & 0xff, (addr >> 16) & 0xff, (addr >> 8) & 0xff,
+ (addr) & 0xff);
+ afs_warn("afs: This suggests the server may be sending bad data that "
+ "can lead to availability issues or data corruption. The "
+ "issue has been avoided for now, but it may not always be "
+ "detectable. Please upgrade the server if possible.\n");
+}
+
+/**
+ * Check if a given AFSFetchStatus structure is sane.
+ *
+ * @param[in] tc The server from which we received the status
+ * @param[in] status The status we received
+ *
+ * @return whether the given structure is valid or not
+ * @retval 0 the structure is fine
+ * @retval nonzero the structure looks like garbage; act as if we received
+ * the returned error code from the server
+ */
+int
+afs_CheckFetchStatus(struct afs_conn *tc, struct AFSFetchStatus *status)
+{
+ if (status->errorCode ||
+ status->InterfaceVersion != 1 ||
+ !(status->FileType > Invalid && status->FileType <= SymbolicLink) ||
+ status->ParentVnode == 0 || status->ParentUnique == 0) {
+
+ afs_warn("afs: FetchStatus ec %u iv %u ft %u pv %u pu %u\n",
+ (unsigned)status->errorCode, (unsigned)status->InterfaceVersion,
+ (unsigned)status->FileType, (unsigned)status->ParentVnode,
+ (unsigned)status->ParentUnique);
+ afs_BadFetchStatus(tc);
+
+ return VBUSY;
+ }
+ return 0;
+}
+
/*!
* Must be called with avc write-locked
* don't absolutely have to invalidate the hint unless the dv has
XSTATS_END_TIME;
+ if (code == 0) {
+ code = afs_CheckFetchStatus(tc, Outsp);
+ }
+
} else
code = -1;
} while (afs_Analyze
ReleaseSharedLock(&afs_xvcache);
ObtainWriteLock(&tvc->lock, 58);
- tvc->f.states &= ~CStatd;
- if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
- osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
+ afs_StaleVCacheFlags(tvc, AFS_STALEVC_NOCB, 0);
/* Is it always appropriate to throw away all the access rights? */
afs_FreeAllAxs(&(tvc->Access));
* Now, copy ".." entry back out of volume structure, if
* necessary
*/
- if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) {
- if (!tvc->mvid)
- tvc->mvid = (struct VenusFid *)
+ if (tvc->mvstat == AFS_MVSTAT_ROOT && tvp->dotdot.Fid.Volume != 0) {
+ if (!tvc->mvid.parent)
+ tvc->mvid.parent = (struct VenusFid *)
osi_AllocSmallSpace(sizeof(struct VenusFid));
- *tvc->mvid = tvp->dotdot;
+ *tvc->mvid.parent = tvp->dotdot;
}
}
/* store the stat on the file */
tvc->f.states &= ~CBulkFetching;
afs_QueueCallback(tvc, CBHash(3600), tvp);
} else {
- afs_DequeueCallback(tvc);
- tvc->callback = NULL;
- tvc->f.states &= ~(CStatd | CUnique);
- if ((tvc->f.states & CForeign) || (tvc->f.fid.Fid.Vnode & 1))
- osi_dnlc_purgedp(tvc); /* if it (could be) a directory */
+ afs_StaleVCacheFlags(tvc, AFS_STALEVC_CBLOCKED | AFS_STALEVC_CLEARCB,
+ CUnique);
}
ReleaseWriteLock(&afs_xcbhash);
if (tvp)
*
* \param avc Pointer to the cache entry to reset
* \param acred
+ * \param skipdnlc skip the dnlc purge for this vnode
*
* \note avc must be write locked on entry
+ *
+ * \note The caller should purge the dnlc when skipdnlc is set.
*/
void
-afs_ResetVCache(struct vcache *avc, afs_ucred_t *acred)
+afs_ResetVCache(struct vcache *avc, afs_ucred_t *acred, afs_int32 skipdnlc)
{
- ObtainWriteLock(&afs_xcbhash, 456);
- afs_DequeueCallback(avc);
- avc->f.states &= ~(CStatd | CDirty); /* next reference will re-stat */
- ReleaseWriteLock(&afs_xcbhash);
+ afs_stalevc_flags_t flags = 0;
+ if (skipdnlc) {
+ flags |= AFS_STALEVC_NODNLC;
+ }
+
+ afs_StaleVCacheFlags(avc, flags, CDirty); /* next reference will re-stat */
/* now find the disk cache entries */
afs_TryToSmush(avc, acred, 1);
- osi_dnlc_purgedp(avc);
if (avc->linkData && !(avc->f.states & CCore)) {
afs_osi_Free(avc->linkData, strlen(avc->linkData) + 1);
avc->linkData = NULL;
static void
findvc_sleep(struct vcache *avc, int flag)
{
- int fstates = avc->f.states;
if (flag & IS_SLOCK) {
ReleaseSharedLock(&afs_xvcache);
} else {
ReleaseReadLock(&afs_xvcache);
}
}
- if (flag & FIND_CDEAD) {
- ObtainWriteLock(&afs_xvcache, 342);
- afs_FlushReclaimedVcaches();
- if (fstates == avc->f.states) {
- ReleaseWriteLock(&afs_xvcache);
- afs_osi_Sleep(&avc->f.states);
- } else
- ReleaseWriteLock(&afs_xvcache);
- } else
- afs_osi_Sleep(&avc->f.states);
+ afs_osi_Sleep(&avc->f.states);
if (flag & IS_SLOCK) {
ObtainSharedLock(&afs_xvcache, 341);
} else {
i = VCHash(afid);
for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
if (FidMatches(afid, tvc)) {
-#ifdef AFS_DARWIN80_ENV
- if (flag & FIND_CDEAD) {
- if (tvc->f.states & (CDeadVnode|CBulkFetching)) {
- deadvc = tvc;
- continue;
- }
- } else {
- if (tvc->f.states & CDeadVnode)
- if ((tvc->f.states & CBulkFetching) &&
- !(flag & FIND_BULKDEAD))
- continue;
- }
-#endif
if (tvc->f.states & CVInit) {
findvc_sleep(tvc, flag);
goto findloop;
findvc_sleep(tvc, flag);
goto findloop;
}
- if (flag & FIND_CDEAD) {
- livevc = tvc;
- continue;
- }
#endif
break;
}
}
-#ifdef AFS_DARWIN80_ENV
- if (flag & FIND_CDEAD) {
- if (livevc && deadvc) {
- /* discard deadvc */
- AFS_GUNLOCK();
- vnode_recycle(AFSTOV(deadvc));
- vnode_put(AFSTOV(deadvc));
- vnode_rele(AFSTOV(deadvc));
- AFS_GLOCK();
- deadvc = NULL;
- }
-
- /* return what's left */
- tvc = livevc ? livevc : deadvc;
- }
-#endif
/* should I have a read lock on the vnode here? */
if (tvc) {
AFS_GLOCK();
tvp = NULL;
}
- if (tvp && (tvc->f.states & (CBulkFetching|CDeadVnode))) {
- AFS_GUNLOCK();
- vnode_recycle(AFSTOV(tvc));
- AFS_GLOCK();
- }
if (!tvp) {
tvc = NULL;
return tvc;
}
#ifdef AFS_DARWIN80_ENV
if (tvc->f.states & CDeadVnode) {
- if (!(tvc->f.states & CBulkFetching)) {
- ReleaseSharedLock(&afs_xvcache);
- afs_osi_Sleep(&tvc->f.states);
- goto loop;
- }
+ ReleaseSharedLock(&afs_xvcache);
+ afs_osi_Sleep(&tvc->f.states);
+ goto loop;
}
tvp = AFSTOV(tvc);
if (vnode_get(tvp)) {
AFS_GLOCK();
continue;
}
- if (tvc->f.states & (CBulkFetching|CDeadVnode)) {
- AFS_GUNLOCK();
- vnode_recycle(AFSTOV(tvc));
- AFS_GLOCK();
- }
#endif /* AFS_DARWIN80_ENV */
count++;
if (found_tvc) {
for (tq = VLRU.prev; tq != &VLRU; tq = uq) {
tvc = QTOV(tq);
uq = QPrev(tq);
- if (tvc->mvid) {
- osi_FreeSmallSpace(tvc->mvid);
- tvc->mvid = (struct VenusFid *)0;
+ if (tvc->mvid.target_root) {
+ osi_FreeSmallSpace(tvc->mvid.target_root);
+ tvc->mvid.target_root = NULL;
}
#ifdef AFS_AIX_ENV
aix_gnode_rele(AFSTOV(tvc));
*/
for (i = 0; i < VCSIZE; i++) {
for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
- if (tvc->mvid) {
- osi_FreeSmallSpace(tvc->mvid);
- tvc->mvid = (struct VenusFid *)0;
+ if (tvc->mvid.target_root) {
+ osi_FreeSmallSpace(tvc->mvid.target_root);
+ tvc->mvid.target_root = NULL;
}
#ifdef AFS_AIX_ENV
if (tvc->v.v_gnode)
for (i = 0; i < VCSIZE; i++) {
for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
- tvc->f.states &= ~(CStatd|CUnique);
+ afs_StaleVCacheFlags(tvc, AFS_STALEVC_NODNLC | AFS_STALEVC_NOCB,
+ CUnique);
}
}
ReleaseWriteLock(&afs_xvcache);
}
+
+/**
+ * Mark a vcache as stale; our metadata for the relevant file may be out of
+ * date.
+ *
+ * @post Any subsequent access to this vcache will cause us to fetch the
+ * metadata for this vcache again.
+ */
+void
+afs_StaleVCacheFlags(struct vcache *avc, afs_stalevc_flags_t flags,
+ afs_uint32 cflags)
+{
+ int do_dnlc = 1;
+ int do_filename = 0;
+ int do_dequeue = 1;
+ int lock_cbhash = 1;
+
+ if ((flags & AFS_STALEVC_NODNLC)) {
+ do_dnlc = 0;
+ }
+ if ((flags & AFS_STALEVC_FILENAME)) {
+ do_filename = 1;
+ }
+ if ((flags & AFS_STALEVC_CBLOCKED)) {
+ lock_cbhash = 0;
+ }
+ if ((flags & AFS_STALEVC_NOCB)) {
+ do_dequeue = 0;
+ lock_cbhash = 0;
+ }
+
+ if (lock_cbhash) {
+ ObtainWriteLock(&afs_xcbhash, 486);
+ }
+ if (do_dequeue) {
+ afs_DequeueCallback(avc);
+ }
+
+ cflags |= CStatd;
+ avc->f.states &= ~cflags;
+
+ if (lock_cbhash) {
+ ReleaseWriteLock(&afs_xcbhash);
+ }
+
+ if ((flags & AFS_STALEVC_SKIP_DNLC_FOR_INIT_FLUSHED) &&
+ (avc->f.states & (CVInit | CVFlushed))) {
+ do_dnlc = 0;
+ }
+
+ if (flags & AFS_STALEVC_CLEARCB) {
+ avc->callback = NULL;
+ }
+
+ if (do_dnlc) {
+ if ((avc->f.fid.Fid.Vnode & 1) ||
+ AFSTOV(avc) == NULL || vType(avc) == VDIR ||
+ (avc->f.states & CForeign)) {
+ /* This vcache is (or could be) a directory. */
+ osi_dnlc_purgedp(avc);
+
+ } else if (do_filename) {
+ osi_dnlc_purgevp(avc);
+ }
+ }
+}
+
+void
+afs_SetDataVersion(struct vcache *avc, afs_hyper_t *avers)
+{
+ hset(avc->f.m.DataVersion, *avers);
+}
git://git.openafs.org / openafs.git / blobdiff