* afs_FlushActiveVcaches
* afs_VerifyVCache2
* afs_WriteVCache
+ * afs_WriteVCacheDiscon
* afs_SimpleVStat
* afs_ProcessFS
* TellALittleWhiteLie
* afs_GetVCache
* afs_LookupVCache
* afs_GetRootVCache
+ * afs_UpdateStatus
* afs_FetchStatus
* afs_StuffVcache
* afs_PutVCache
/* Exported variables */
afs_rwlock_t afs_xvcache; /*Lock: alloc new stat cache entries */
+afs_rwlock_t afs_xvreclaim; /*Lock: entries reclaimed, not on free list */
afs_lock_t afs_xvcb; /*Lock: fids on which there are callbacks */
#if !defined(AFS_LINUX22_ENV)
static struct vcache *freeVCList; /*Free list for stat cache entries */
+struct vcache *ReclaimedVCList; /*Reclaimed list for stat entries */
static struct vcache *Initial_freeVCList; /*Initial list for above */
#endif
struct afs_q VLRU; /*vcache LRU */
/* Forward declarations */
static afs_int32 afs_QueueVCB(struct vcache *avc);
-/*
- * afs_HashCBRFid
- *
+/*!
* Generate an index into the hash table for a given Fid.
+ * \param fid
+ * \return The hash value.
*/
static int
afs_HashCBRFid(struct AFSFid *fid)
return (fid->Volume + fid->Vnode + fid->Unique) % CBRSIZE;
}
-/*
- * afs_InsertHashCBR
- *
+/*!
* Insert a CBR entry into the hash table.
* Must be called with afs_xvcb held.
+ * \param cbr
+ * \return
*/
static void
afs_InsertHashCBR(struct afs_cbr *cbr)
afs_cbrHashT[slot] = cbr;
}
-/*
- * afs_FlushVCache
- *
- * Description:
- * Flush the given vcache entry.
+/*!
*
- * Parameters:
- * avc : Pointer to vcache entry to flush.
- * slept : Pointer to int to set 1 if we sleep/drop locks, 0 if we don't.
+ * Flush the given vcache entry.
*
* Environment:
* afs_xvcache lock must be held for writing upon entry to
* LOCK: afs_FlushVCache afs_xvcache W
* REFCNT: vcache ref count must be zero on entry except for osf1
* RACE: lock is dropped and reobtained, permitting race in caller
+ *
+ * \param avc Pointer to vcache entry to flush.
+ * \param slept Pointer to int to set 1 if we sleep/drop locks, 0 if we don't.
+ *
*/
-
int
afs_FlushVCache(struct vcache *avc, int *slept)
{ /*afs_FlushVCache */
avc->states |= CVFlushed;
/* pull the entry out of the lruq and put it on the free list */
QRemove(&avc->vlruq);
- avc->vlruq.prev = avc->vlruq.next = (struct afs_q *)0;
/* keep track of # of files that we bulk stat'd, but never used
* before they got recycled.
AFSTOV(avc) = NULL; /* also drop the ptr to vnode */
}
#endif
+#ifdef AFS_SUN510_ENV
+ /* As we use private vnodes, cleanup is up to us */
+ vn_reinit(AFSTOV(avc));
+#endif
afs_FreeAllAxs(&(avc->Access));
/* we can't really give back callbacks on RO files, since the
} /*afs_FlushVCache */
#ifndef AFS_SGI_ENV
-/*
- * afs_InactiveVCache
+/*!
+ * The core of the inactive vnode op for all but IRIX.
*
- * The core of the inactive vnode op for all but IRIX.
+ * \param avc
+ * \param acred
*/
void
afs_InactiveVCache(struct vcache *avc, struct AFS_UCRED *acred)
}
#endif
-/*
- * afs_AllocCBR
- *
- * Description: allocate a callback return structure from the
+/*!
+ * Allocate a callback return structure from the
* free list and return it.
*
- * Env: The alloc and free routines are both called with the afs_xvcb lock
+ * Environment: The alloc and free routines are both called with the afs_xvcb lock
* held, so we don't have to worry about blocking in osi_Alloc.
+ *
+ * \return The allocated afs_cbr.
*/
static struct afs_cbr *afs_cbrSpace = 0;
struct afs_cbr *
return tsp;
}
-/*
- * afs_FreeCBR
+/*!
+ * Free a callback return structure, removing it from all lists.
*
- * Description: free a callback return structure, removing it from all lists.
+ * Environment: the xvcb lock is held over these calls.
*
- * Parameters:
- * asp -- the address of the structure to free.
+ * \param asp The address of the structure to free.
*
- * Environment: the xvcb lock is held over these calls.
+ * \rerurn 0
*/
int
afs_FreeCBR(register struct afs_cbr *asp)
return 0;
}
-/*
- * afs_FlushVCBs
- *
- * Description: flush all queued callbacks to all servers.
- *
- * Parameters: none.
+/*!
+ * Flush all queued callbacks to all servers.
*
* Environment: holds xvcb lock over RPC to guard against race conditions
* when a new callback is granted for the same file later on.
+ *
+ * \return 0 for success.
*/
afs_int32
afs_FlushVCBs(afs_int32 lockit)
return 0;
}
-/*
- * afs_QueueVCB
- *
- * Description:
- * Queue a callback on the given fid.
- *
- * Parameters:
- * avc: vcache entry
+/*!
+ * Queue a callback on the given fid.
*
* Environment:
* Locks the xvcb lock.
* Called when the xvcache lock is already held.
+ *
+ * \param avc vcache entry
+ * \return 0 for success < 0 otherwise.
*/
static afs_int32
}
-/*
- * afs_RemoveVCB
- *
- * Description:
- * Remove a queued callback for a given Fid.
- *
- * Parameters:
- * afid: The fid we want cleansed of queued callbacks.
+/*!
+ * Remove a queued callback for a given Fid.
*
* Environment:
* Locks xvcb and xserver locks.
* Typically called with xdcache, xvcache and/or individual vcache
* entries locked.
+ *
+ * \param afid The fid we want cleansed of queued callbacks.
+ *
*/
void
MReleaseWriteLock(&afs_xvcb);
}
-/*
- * afs_NewVCache
+void
+afs_FlushReclaimedVcaches(void)
+{
+#if !defined(AFS_LINUX22_ENV)
+ struct vcache *tvc;
+ int code, fv_slept;
+ struct vcache *tmpReclaimedVCList = NULL;
+
+ ObtainWriteLock(&afs_xvreclaim, 76);
+ while (ReclaimedVCList) {
+ tvc = ReclaimedVCList; /* take from free list */
+ ReclaimedVCList = tvc->nextfree;
+ tvc->nextfree = NULL;
+ code = afs_FlushVCache(tvc, &fv_slept);
+ if (code) {
+ /* Ok, so, if we got code != 0, uh, wtf do we do? */
+ /* Probably, build a temporary list and then put all back when we
+ get to the end of the list */
+ /* This is actually really crappy, but we need to not leak these.
+ We probably need a way to be smarter about this. */
+ tvc->nextfree = tmpReclaimedVCList;
+ tmpReclaimedVCList = tvc;
+ printf("Reclaim list flush %lx failed: %d\n", (unsigned long) tvc, code);
+ }
+ if (tvc->states & (CVInit
+#ifdef AFS_DARWIN80_ENV
+ | CDeadVnode
+#endif
+ )) {
+ tvc->states &= ~(CVInit
+#ifdef AFS_DARWIN80_ENV
+ | CDeadVnode
+#endif
+ );
+ afs_osi_Wakeup(&tvc->states);
+ }
+ }
+ if (tmpReclaimedVCList)
+ ReclaimedVCList = tmpReclaimedVCList;
+
+ ReleaseWriteLock(&afs_xvreclaim);
+#endif
+}
+
+/*!
+ * This routine is responsible for allocating a new cache entry
+ * from the free list. It formats the cache entry and inserts it
+ * into the appropriate hash tables. It must be called with
+ * afs_xvcache write-locked so as to prevent several processes from
+ * trying to create a new cache entry simultaneously.
*
- * Description:
- * This routine is responsible for allocating a new cache entry
- * from the free list. It formats the cache entry and inserts it
- * into the appropriate hash tables. It must be called with
- * afs_xvcache write-locked so as to prevent several processes from
- * trying to create a new cache entry simultaneously.
+ * LOCK: afs_NewVCache afs_xvcache W
*
- * Parameters:
- * afid : The file id of the file whose cache entry is being
- * created.
+ * \param afid The file id of the file whose cache entry is being created.
+ *
+ * \return The new vcache struct.
*/
-/* LOCK: afs_NewVCache afs_xvcache W */
struct vcache *
afs_NewVCache(struct VenusFid *afid, struct server *serverp)
{
int code, fv_slept;
AFS_STATCNT(afs_NewVCache);
+
+ afs_FlushReclaimedVcaches();
+
#if defined(AFS_OSF_ENV) || defined(AFS_LINUX22_ENV)
#if defined(AFS_OSF30_ENV) || defined(AFS_LINUX22_ENV)
if (afs_vcount >= afs_maxvcount)
if (tvc != afs_globalVp && VREFCOUNT(tvc) > 1 && tvc->opens == 0) {
struct dentry *dentry;
struct list_head *cur, *head;
- AFS_FAST_HOLD(tvc);
AFS_GUNLOCK();
#if defined(AFS_LINUX24_ENV)
spin_lock(&dcache_lock);
#endif
inuse:
AFS_GLOCK();
- AFS_FAST_RELE(tvc);
}
#endif
return NULL;
}
}
- }
+ } /* finished freeing up space */
+/* Alloc new vnode. */
#if defined(AFS_LINUX22_ENV)
{
struct inode *ip;
#else /* AFS_OSF_ENV */
/* pull out a free cache entry */
if (!freeVCList) {
+ int loop = 0;
i = 0;
for (tq = VLRU.prev; (anumber > 0) && (tq != &VLRU); tq = uq) {
tvc = QTOV(tq);
/* VREFCOUNT_GT only sees usecounts, not iocounts */
/* so this may fail to actually recycle the vnode now */
/* must call vnode_get to avoid races. */
+ fv_slept = 0;
if (vnode_get(tvp) == 0) {
fv_slept=1;
/* must release lock, since vnode_put will immediately
/* we can't use the vnode_recycle return value to figure
* this out, since the iocount we have to hold makes it
* always "fail" */
- if (AFSTOV(tvc) == tvp)
+ if (AFSTOV(tvc) == tvp) {
+ if (anumber > 0 && fv_slept) {
+ QRemove(&tvc->vlruq);
+ QAdd(&VLRU, &tvc->vlruq);
+ }
code = EBUSY;
- else
+ } else
code = 0;
#else
/*
anumber--;
}
if (fv_slept) {
+ if (loop++ > 100)
+ break;
uq = VLRU.prev;
i = 0;
continue; /* start over - may have raced. */
if (tq == uq)
break;
}
- }
+ } /* end of if (!freeVCList) */
+
if (!freeVCList) {
/* none free, making one is better than a panic */
afs_stats_cmperf.vcacheXAllocs++; /* count in case we have a leak */
tvc = freeVCList; /* take from free list */
freeVCList = tvc->nextfree;
tvc->nextfree = NULL;
- }
+ } /* end of if (!freeVCList) */
+
#endif /* AFS_OSF_ENV */
#if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV)
tvc->uncred = 0;
#endif
- RWLOCK_INIT(&tvc->lock, "vcache lock");
+ AFS_RWLOCK_INIT(&tvc->lock, "vcache lock");
#if defined(AFS_SUN5_ENV)
- RWLOCK_INIT(&tvc->vlock, "vcache vlock");
+ AFS_RWLOCK_INIT(&tvc->vlock, "vcache vlock");
#endif /* defined(AFS_SUN5_ENV) */
tvc->parentVnode = 0;
tvc->Access = NULL;
tvc->callback = serverp; /* to minimize chance that clear
* request is lost */
+#if defined(AFS_DISCON_ENV)
+ tvc->ddirty_next = NULL;
+ tvc->ddirty_flags = 0;
+#endif
i = VCHash(afid);
j = VCHashV(afid);
tvc->vmh = tvc->segid = NULL;
tvc->credp = NULL;
#endif
+
+#if defined(AFS_CACHE_BYPASS)
+ tvc->cachingStates = 0;
+ tvc->cachingTransitions = 0;
+#endif
+
#ifdef AFS_BOZONLOCK_ENV
#if defined(AFS_SUN5_ENV)
rw_init(&tvc->rwlock, "vcache rwlock", RW_DEFAULT, NULL);
insmntque(tvc, afs_globalVFS);
#endif /* AFS_OSF_ENV */
#endif /* AFS_DUX40_ENV */
+#ifdef AFS_FBSD70_ENV
+#ifndef AFS_FBSD80_ENV /* yup. they put it back. */
+ insmntque(AFSTOV(tvc), afs_globalVFS);
+#endif
+#endif
#if defined(AFS_SGI_ENV)
VN_SET_DPAGES(&(tvc->v), (struct pfdat *)NULL);
osi_Assert((tvc->v.v_flag & VINACT) == 0);
} /*afs_NewVCache */
-/*
- * afs_FlushActiveVcaches
+/*!
+ * ???
*
- * Description:
- * ???
+ * LOCK: afs_FlushActiveVcaches afs_xvcache N
*
- * Parameters:
- * doflocks : Do we handle flocks?
+ * \param doflocks : Do we handle flocks?
*/
-/* LOCK: afs_FlushActiveVcaches afs_xvcache N */
void
afs_FlushActiveVcaches(register afs_int32 doflocks)
{
-/*
- * afs_VerifyVCache
- *
- * Description:
- * Make sure a cache entry is up-to-date status-wise.
+/*!
+ * Make sure a cache entry is up-to-date status-wise.
*
* NOTE: everywhere that calls this can potentially be sped up
* by checking CStatd first, and avoiding doing the InitReq
* Anymore, the only places that call this KNOW already that the
* vcache is not up-to-date, so we don't screw around.
*
- * Parameters:
- * avc : Ptr to vcache entry to verify.
- * areq : ???
+ * \param avc : Ptr to vcache entry to verify.
+ * \param areq : ???
*/
+/*!
+ *
+ * Make sure a cache entry is up-to-date status-wise.
+ *
+ * NOTE: everywhere that calls this can potentially be sped up
+ * by checking CStatd first, and avoiding doing the InitReq
+ * if this is up-to-date.
+ *
+ * Anymore, the only places that call this KNOW already that the
+ * vcache is not up-to-date, so we don't screw around.
+ *
+ * \param avc Pointer to vcache entry to verify.
+ * \param areq
+ *
+ * \return 0 for success or other error codes.
+ */
int
afs_VerifyVCache2(struct vcache *avc, struct vrequest *areq)
{
} /*afs_VerifyVCache */
-/*
- * afs_SimpleVStat
- *
- * Description:
- * Simple copy of stat info into cache.
+/*!
+ * Simple copy of stat info into cache.
*
- * Parameters:
- * avc : Ptr to vcache entry involved.
- * astat : Ptr to stat info to copy.
+ * Callers:as of 1992-04-29, only called by WriteVCache
*
- * Environment:
- * Nothing interesting.
+ * \param avc Ptr to vcache entry involved.
+ * \param astat Ptr to stat info to copy.
*
- * Callers: as of 1992-04-29, only called by WriteVCache
*/
static void
afs_SimpleVStat(register struct vcache *avc,
} /*afs_SimpleVStat */
-/*
- * afs_WriteVCache
+/*!
+ * Store the status info *only* back to the server for a
+ * fid/vrequest.
*
- * Description:
- * Store the status info *only* back to the server for a
- * fid/vrequest.
+ * Environment: Must be called with a shared lock held on the vnode.
*
- * Parameters:
- * avc : Ptr to the vcache entry.
- * astatus : Ptr to the status info to store.
- * areq : Ptr to the associated vrequest.
+ * \param avc Ptr to the vcache entry.
+ * \param astatus Ptr to the status info to store.
+ * \param areq Ptr to the associated vrequest.
*
- * Environment:
- * Must be called with a shared lock held on the vnode.
+ * \return Operation status.
*/
int
AFS_STATCNT(afs_WriteVCache);
afs_Trace2(afs_iclSetp, CM_TRACE_WVCACHE, ICL_TYPE_POINTER, avc,
ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
-
do {
tc = afs_Conn(&avc->fid, areq, SHARED_LOCK);
if (tc) {
return code;
} /*afs_WriteVCache */
+#if defined(AFS_DISCON_ENV)
-/*
- * afs_ProcessFS
+/*!
+ * Store status info only locally, set the proper disconnection flags
+ * and add to dirty list.
*
- * Description:
- * Copy astat block into vcache info
+ * \param avc The vcache to be written locally.
+ * \param astatus Get attr fields from local store.
+ * \param attrs This one is only of the vs_size.
*
- * Parameters:
- * avc : Ptr to vcache entry.
- * astat : Ptr to stat block to copy in.
- * areq : Ptr to associated request.
+ * \note Must be called with a shared lock on the vnode
+ */
+int afs_WriteVCacheDiscon(register struct vcache *avc,
+ register struct AFSStoreStatus *astatus,
+ struct vattr *attrs)
+{
+ afs_int32 code = 0;
+ afs_int32 flags = 0;
+
+ UpgradeSToWLock(&avc->lock, 700);
+
+ if (!astatus->Mask) {
+
+ return code;
+
+ } else {
+
+ /* Set attributes. */
+ if (astatus->Mask & AFS_SETMODTIME) {
+ avc->m.Date = astatus->ClientModTime;
+ flags |= VDisconSetTime;
+ }
+
+ if (astatus->Mask & AFS_SETOWNER) {
+ printf("Not allowed yet. \n");
+ //avc->m.Owner = astatus->Owner;
+ }
+
+ if (astatus->Mask & AFS_SETGROUP) {
+ printf("Not allowed yet. \n");
+ //avc->m.Group = astatus->Group;
+ }
+
+ if (astatus->Mask & AFS_SETMODE) {
+ avc->m.Mode = astatus->UnixModeBits;
+
+#if 0 /* XXX: Leaving this out, so it doesn't mess up the file type flag.*/
+
+ if (vType(avc) == VREG) {
+ avc->m.Mode |= S_IFREG;
+ } else if (vType(avc) == VDIR) {
+ avc->m.Mode |= S_IFDIR;
+ } else if (vType(avc) == VLNK) {
+ avc->m.Mode |= S_IFLNK;
+ if ((avc->m.Mode & 0111) == 0)
+ avc->mvstat = 1;
+ }
+#endif
+ flags |= VDisconSetMode;
+ } /* if(astatus.Mask & AFS_SETMODE) */
+
+ } /* if (!astatus->Mask) */
+
+ if (attrs->va_size > 0) {
+ /* XXX: Do I need more checks? */
+ /* Truncation operation. */
+ flags |= VDisconTrunc;
+ }
+
+ ObtainWriteLock(&afs_DDirtyVCListLock, 701);
+
+ if (flags) {
+ /* Add to disconnected dirty list and set dirty flag.*/
+ if (!avc->ddirty_flags ||
+ (avc->ddirty_flags == VDisconShadowed)) {
+ /* Not in dirty list. */
+ AFS_DISCON_ADD_DIRTY(avc, 1);
+ }
+
+ avc->ddirty_flags |= flags;
+ }
+
+ ReleaseWriteLock(&afs_DDirtyVCListLock);
+
+ /* XXX: How about the rest of the fields? */
+
+ ConvertWToSLock(&avc->lock);
+
+ return code;
+}
+
+#endif
+
+/*!
+ * Copy astat block into vcache info
*
- * Environment:
- * Must be called under a write lock
+ * \note This code may get dataversion and length out of sync if the file has
+ * been modified. This is less than ideal. I haven't thought about it sufficiently
+ * to be certain that it is adequate.
*
- * Note: this code may get dataversion and length out of sync if the file has
- * been modified. This is less than ideal. I haven't thought about
- * it sufficiently to be certain that it is adequate.
+ * \note Environment: Must be called under a write lock
+ *
+ * \param avc Ptr to vcache entry.
+ * \param astat Ptr to stat block to copy in.
+ * \param areq Ptr to associated request.
*/
void
afs_ProcessFS(register struct vcache *avc,
} /*afs_ProcessFS */
+/*!
+ * Get fid from server.
+ *
+ * \param afid
+ * \param areq Request to be passed on.
+ * \param name Name of ?? to lookup.
+ * \param OutStatus Fetch status.
+ * \param CallBackp
+ * \param serverp
+ * \param tsyncp
+ *
+ * \return Success status of operation.
+ */
int
afs_RemoteLookup(register struct VenusFid *afid, struct vrequest *areq,
char *name, struct VenusFid *nfid,
struct AFSFetchStatus OutDirStatus;
XSTATS_DECLS;
if (!name)
- name = ""; /* XXX */
+ name = ""; /* XXX */
do {
tc = afs_Conn(afid, areq, SHARED_LOCK);
if (tc) {
}
-/*
+/*!
* afs_GetVCache
*
- * Description:
- * Given a file id and a vrequest structure, fetch the status
- * information associated with the file.
+ * Given a file id and a vrequest structure, fetch the status
+ * information associated with the file.
*
- * Parameters:
- * afid : File ID.
- * areq : Ptr to associated vrequest structure, specifying the
- * user whose authentication tokens will be used.
- * avc : caller may already have a vcache for this file, which is
- * already held.
+ * \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.
*
- * Environment:
+ * \note Environment:
* The cache entry is returned with an increased vrefCount field.
* The entry must be discarded by calling afs_PutVCache when you
* are through using the pointer to the cache entry.
* of a parent dir cache entry, given a file (to check its access
* control list). It also allows renames to be handled easily by
* locking directories in a constant order.
- * NB. NewVCache -> FlushVCache presently (4/10/95) drops the xvcache lock.
+ *
+ * \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
*/
- /* might have a vcache structure already, which must
- * already be held by the caller */
-
struct vcache *
afs_GetVCache(register struct VenusFid *afid, struct vrequest *areq,
afs_int32 * cached, struct vcache *avc)
if (cached)
*cached = 1;
osi_Assert((tvc->states & CVInit) == 0);
- if (tvc->states & CStatd) {
+ /* If we are in readdir, return the vnode even if not statd */
+ if ((tvc->states & CStatd) || afs_InReadDir(tvc)) {
ReleaseSharedLock(&afs_xvcache);
return tvc;
}
ObtainWriteLock(&tvc->lock, 954);
if (!iheldthelock)
VOP_UNLOCK(vp, LK_EXCLUSIVE, current_proc());
+#elif defined(AFS_FBSD80_ENV)
+ iheldthelock = VOP_ISLOCKED(vp);
+ if (!iheldthelock) {
+ /* nosleep/sleep lock order reversal */
+ int glocked = ISAFS_GLOCK();
+ if (glocked)
+ AFS_GUNLOCK();
+ vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
+ if (glocked)
+ AFS_GLOCK();
+ }
+ vinvalbuf(vp, V_SAVE, curthread, PINOD, 0);
+ if (!iheldthelock)
+ VOP_UNLOCK(vp, 0);
#elif defined(AFS_FBSD60_ENV)
iheldthelock = VOP_ISLOCKED(vp, curthread);
if (!iheldthelock)
if (afs_DynrootNewVnode(tvc, &OutStatus)) {
afs_ProcessFS(tvc, &OutStatus, areq);
tvc->states |= CStatd | CUnique;
+ tvc->parentVnode = OutStatus.ParentVnode;
+ tvc->parentUnique = OutStatus.ParentUnique;
code = 0;
} else {
- code = afs_FetchStatus(tvc, afid, areq, &OutStatus);
+
+ if (AFS_IS_DISCONNECTED) {
+ /* Nothing to do otherwise...*/
+ code = ENETDOWN;
+ printf("Network is down in afs_GetCache");
+ } else
+ code = afs_FetchStatus(tvc, afid, areq, &OutStatus);
+
+ /* For the NFS translator's benefit, make sure
+ * non-directory vnodes always have their parent FID set
+ * correctly, even when created as a result of decoding an
+ * NFS filehandle. It would be nice to also do this for
+ * directories, but we can't because the fileserver fills
+ * in the FID of the directory itself instead of that of
+ * its parent.
+ */
+ if (!code && OutStatus.FileType != Directory &&
+ !tvc->parentVnode) {
+ tvc->parentVnode = OutStatus.ParentVnode;
+ tvc->parentUnique = OutStatus.ParentUnique;
+ }
}
}
+/*!
+ * Lookup a vcache by fid. Look inside the cache first, if not
+ * there, lookup the file on the server, and then get it's fresh
+ * cache entry.
+ *
+ * \param afid
+ * \param areq
+ * \param cached Is element cached? If NULL, don't answer.
+ * \param adp
+ * \param aname
+ *
+ * \return The found element or NULL.
+ */
struct vcache *
afs_LookupVCache(struct VenusFid *afid, struct vrequest *areq,
afs_int32 * cached, struct vcache *adp, char *aname)
nfid = *afid;
now = osi_Time();
origCBs = afs_allCBs; /* if anything changes, we don't have a cb */
- code =
- afs_RemoteLookup(&adp->fid, areq, aname, &nfid, &OutStatus, &CallBack,
- &serverp, &tsync);
+
+ if (AFS_IS_DISCONNECTED) {
+ printf("Network is down in afs_LookupVcache\n");
+ code = ENETDOWN;
+ } else
+ code =
+ afs_RemoteLookup(&adp->fid, areq, aname, &nfid, &OutStatus,
+ &CallBack, &serverp, &tsync);
#if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
loop2:
#ifdef AFS_OSF_ENV
int vg;
#endif
+#ifdef AFS_DARWIN80_ENV
+ vnode_t tvp;
+#endif
start = osi_Time();
afs_osi_Sleep(&tvc->states);
goto rootvc_loop;
}
- if (vnode_get(AFSTOV(tvc))) /* this bumps ref count */
- continue;
+ tvp = AFSTOV(tvc);
+ if (vnode_get(tvp)) /* this bumps ref count */
+ continue;
+ if (vnode_ref(tvp)) {
+ AFS_GUNLOCK();
+ /* AFSTOV(tvc) may be NULL */
+ vnode_put(tvp);
+ AFS_GLOCK();
+ continue;
+ }
#endif
break;
}
if (tvc) {
AFS_GUNLOCK();
vnode_put(AFSTOV(tvc));
+ vnode_rele(AFSTOV(tvc));
AFS_GLOCK();
}
#endif
if (cached)
*cached = 1;
afs_stats_cmperf.vcacheHits++;
-#ifdef AFS_OSF_ENV
+#if defined(AFS_OSF_ENV) || defined(AFS_DARWIN80_ENV)
/* we already bumped the ref count in the for loop above */
#else /* AFS_OSF_ENV */
osi_vnhold(tvc, 0);
}
+/*!
+ * Update callback status and (sometimes) attributes of a vnode.
+ * Called after doing a fetch status RPC. Whilst disconnected, attributes
+ * shouldn't be written to the vcache here.
+ *
+ * \param avc
+ * \param afid
+ * \param areq
+ * \param Outsp Server status after rpc call.
+ * \param acb Callback for this vnode.
+ *
+ * \note The vcache must be write locked.
+ */
+void
+afs_UpdateStatus(struct vcache *avc,
+ struct VenusFid *afid,
+ struct vrequest *areq,
+ struct AFSFetchStatus *Outsp,
+ struct AFSCallBack *acb,
+ afs_uint32 start)
+{
+ struct volume *volp;
-/*
- * must be called with avc write-locked
+ if (!AFS_IN_SYNC)
+ /* Dont write status in vcache if resyncing after a disconnection. */
+ afs_ProcessFS(avc, Outsp, areq);
+
+ volp = afs_GetVolume(afid, areq, READ_LOCK);
+ ObtainWriteLock(&afs_xcbhash, 469);
+ avc->states |= CTruth;
+ if (avc->callback /* check for race */ ) {
+ if (acb->ExpirationTime != 0) {
+ avc->cbExpires = acb->ExpirationTime + start;
+ avc->states |= CStatd;
+ avc->states &= ~CBulkFetching;
+ afs_QueueCallback(avc, CBHash(acb->ExpirationTime), volp);
+ } else if (avc->states & CRO) {
+ /* ordinary callback on a read-only volume -- AFS 3.2 style */
+ avc->cbExpires = 3600 + start;
+ avc->states |= CStatd;
+ avc->states &= ~CBulkFetching;
+ afs_QueueCallback(avc, CBHash(3600), volp);
+ } else {
+ afs_DequeueCallback(avc);
+ avc->callback = NULL;
+ avc->states &= ~(CStatd | CUnique);
+ if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
+ osi_dnlc_purgedp(avc); /* if it (could be) a directory */
+ }
+ } else {
+ afs_DequeueCallback(avc);
+ avc->callback = NULL;
+ avc->states &= ~(CStatd | CUnique);
+ if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
+ osi_dnlc_purgedp(avc); /* if it (could be) a directory */
+ }
+ ReleaseWriteLock(&afs_xcbhash);
+ if (volp)
+ afs_PutVolume(volp, READ_LOCK);
+
+}
+
+/*!
+ * Must be called with avc write-locked
* don't absolutely have to invalidate the hint unless the dv has
* changed, but be sure to get it right else there will be consistency bugs.
*/
register struct conn *tc;
struct AFSCallBack CallBack;
struct AFSVolSync tsync;
- struct volume *volp;
XSTATS_DECLS;
do {
tc = afs_Conn(afid, areq, SHARED_LOCK);
SHARED_LOCK, NULL));
if (!code) {
- afs_ProcessFS(avc, Outsp, areq);
- volp = afs_GetVolume(afid, areq, READ_LOCK);
- ObtainWriteLock(&afs_xcbhash, 469);
- avc->states |= CTruth;
- if (avc->callback /* check for race */ ) {
- if (CallBack.ExpirationTime != 0) {
- avc->cbExpires = CallBack.ExpirationTime + start;
- avc->states |= CStatd;
- avc->states &= ~CBulkFetching;
- afs_QueueCallback(avc, CBHash(CallBack.ExpirationTime), volp);
- } else if (avc->states & CRO) { /* ordinary callback on a read-only volume -- AFS 3.2 style */
- avc->cbExpires = 3600 + start;
- avc->states |= CStatd;
- avc->states &= ~CBulkFetching;
- afs_QueueCallback(avc, CBHash(3600), volp);
- } else {
- afs_DequeueCallback(avc);
- avc->callback = NULL;
- avc->states &= ~(CStatd | CUnique);
- if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
- osi_dnlc_purgedp(avc); /* if it (could be) a directory */
- }
- } else {
- afs_DequeueCallback(avc);
- avc->callback = NULL;
- avc->states &= ~(CStatd | CUnique);
- if ((avc->states & CForeign) || (avc->fid.Fid.Vnode & 1))
- osi_dnlc_purgedp(avc); /* if it (could be) a directory */
- }
- ReleaseWriteLock(&afs_xcbhash);
- if (volp)
- afs_PutVolume(volp, READ_LOCK);
+ afs_UpdateStatus(avc, afid, areq, Outsp, &CallBack, start);
} else {
/* used to undo the local callback, but that's too extreme.
* There are plenty of good reasons that fetchstatus might return
} /*afs_StuffVcache */
#endif
-/*
- * afs_PutVCache
- *
- * Description:
- * Decrements the reference count on a cache entry.
+/*!
+ * Decrements the reference count on a cache entry.
*
- * Parameters:
- * avc : Pointer to the cache entry to decrement.
+ * \param avc Pointer to the cache entry to decrement.
*
- * Environment:
- * Nothing interesting.
+ * \note Environment: Nothing interesting.
*/
void
afs_PutVCache(register struct vcache *avc)
} /*afs_PutVCache */
+/*!
+ * Reset a vcache entry, so local contents are ignored, and the
+ * server will be reconsulted next time the vcache is used
+ *
+ * \param avc Pointer to the cache entry to reset
+ * \param acred
+ *
+ * \note avc must be write locked on entry
+ */
+void
+afs_ResetVCache(struct vcache *avc, struct AFS_UCRED *acred) {
+ ObtainWriteLock(&afs_xcbhash, 456);
+ afs_DequeueCallback(avc);
+ avc->states &= ~(CStatd | CDirty); /* next reference will re-stat */
+ ReleaseWriteLock(&afs_xcbhash);
+ /* now find the disk cache entries */
+ afs_TryToSmush(avc, acred, 1);
+ osi_dnlc_purgedp(avc);
+ if (avc->linkData && !(avc->states & CCore)) {
+ afs_osi_Free(avc->linkData, strlen(avc->linkData) + 1);
+ avc->linkData = NULL;
+ }
+}
+
+/*!
+ * Sleepa when searching for a vcache. Releases all the pending locks,
+ * sleeps then obtains the previously released locks.
+ *
+ * \param vcache Enter sleep state.
+ * \param flag Determines what locks to use.
+ *
+ * \return
+ */
static void findvc_sleep(struct vcache *avc, int flag) {
if (flag & IS_SLOCK) {
ReleaseSharedLock(&afs_xvcache);
}
}
}
-/*
- * afs_FindVCache
+/*!
+ * Find a vcache entry given a fid.
*
- * Description:
- * Find a vcache entry given a fid.
+ * \param afid Pointer to the fid whose cache entry we desire.
+ * \param retry (SGI-specific) tell the caller to drop the lock on xvcache,
+ * unlock the vnode, and try again.
+ * \param flag Bit 1 to specify whether to compute hit statistics. Not
+ * set if FindVCache is called as part of internal bookkeeping.
*
- * Parameters:
- * afid : Pointer to the fid whose cache entry we desire.
- * retry: (SGI-specific) tell the caller to drop the lock on xvcache,
- * unlock the vnode, and try again.
- * flags: bit 1 to specify whether to compute hit statistics. Not
- * set if FindVCache is called as part of internal bookkeeping.
- *
- * Environment:
- * Must be called with the afs_xvcache lock at least held at
- * the read level. In order to do the VLRU adjustment, the xvcache lock
- * must be shared-- we upgrade it here.
+ * \note Environment: Must be called with the afs_xvcache lock at least held at
+ * the read level. In order to do the VLRU adjustment, the xvcache lock
+ * must be shared-- we upgrade it here.
*/
struct vcache *
#if defined( AFS_OSF_ENV)
int vg;
#endif
+#ifdef AFS_DARWIN80_ENV
+ vnode_t tvp;
+#endif
AFS_STATCNT(afs_FindVCache);
findvc_sleep(tvc, flag);
goto findloop;
}
- if (vnode_get(AFSTOV(tvc)))
- continue;
+ tvp = AFSTOV(tvc);
+ if (vnode_get(tvp))
+ continue;
+ if (vnode_ref(tvp)) {
+ AFS_GUNLOCK();
+ /* AFSTOV(tvc) may be NULL */
+ vnode_put(tvp);
+ AFS_GLOCK();
+ continue;
+ }
#endif
break;
}
if (tvc) {
if (retry)
*retry = 0;
-#if !defined(AFS_OSF_ENV)
+#if !defined(AFS_OSF_ENV) && !defined(AFS_DARWIN80_ENV)
osi_vnhold(tvc, retry); /* already held, above */
if (retry && *retry)
return 0;
return tvc;
} /*afs_FindVCache */
-/*
- * afs_NFSFindVCache
- *
- * Description:
- * Find a vcache entry given a fid. Does a wildcard match on what we
- * have for the fid. If more than one entry, don't return anything.
+/*!
+ * Find a vcache entry given a fid. Does a wildcard match on what we
+ * have for the fid. If more than one entry, don't return anything.
*
- * Parameters:
- * avcp : Fill in pointer if we found one and only one.
- * afid : Pointer to the fid whose cache entry we desire.
- * retry: (SGI-specific) tell the caller to drop the lock on xvcache,
+ * \param avcp Fill in pointer if we found one and only one.
+ * \param afid Pointer to the fid whose cache entry we desire.
+ * \param retry (SGI-specific) tell the caller to drop the lock on xvcache,
* unlock the vnode, and try again.
- * flags: bit 1 to specify whether to compute hit statistics. Not
+ * \param flags bit 1 to specify whether to compute hit statistics. Not
* set if FindVCache is called as part of internal bookkeeping.
*
- * Environment:
- * Must be called with the afs_xvcache lock at least held at
- * the read level. In order to do the VLRU adjustment, the xvcache lock
- * must be shared-- we upgrade it here.
+ * \note Environment: Must be called with the afs_xvcache lock at least held at
+ * the read level. In order to do the VLRU adjustment, the xvcache lock
+ * must be shared-- we upgrade it here.
*
- * Return value:
- * number of matches found.
+ * \return Number of matches found.
*/
int afs_duplicate_nfs_fids = 0;
#ifdef AFS_OSF_ENV
int vg;
#endif
+#ifdef AFS_DARWIN80_ENV
+ vnode_t tvp;
+#endif
AFS_STATCNT(afs_FindVCache);
&& ((tvc->fid.Fid.Unique & 0xffffff) == afid->Fid.Unique)
&& (tvc->fid.Cell == afid->Cell)) {
if (tvc->states & CVInit) {
- int lock;
ReleaseSharedLock(&afs_xvcache);
afs_osi_Sleep(&tvc->states);
goto loop;
afs_osi_Sleep(&tvc->states);
goto loop;
}
- if (vnode_get(AFSTOV(tvc))) {
- /* This vnode no longer exists. */
- continue;
- }
+ tvp = AFSTOV(tvc);
+ if (vnode_get(tvp)) {
+ /* This vnode no longer exists. */
+ continue;
+ }
+ if (vnode_ref(tvp)) {
+ /* This vnode no longer exists. */
+ AFS_GUNLOCK();
+ /* AFSTOV(tvc) may be NULL */
+ vnode_put(tvp);
+ AFS_GLOCK();
+ continue;
+ }
#endif /* AFS_DARWIN80_ENV */
count++;
if (found_tvc) {
-/*
- * afs_vcacheInit
- *
+/*!
* Initialize vcache related variables
+ *
+ * \param astatSize
*/
void
afs_vcacheInit(int astatSize)
freeVCList = NULL;
#endif
- RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
+ AFS_RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
LOCK_INIT(&afs_xvcb, "afs_xvcb");
#if !defined(AFS_OSF_ENV) && !defined(AFS_LINUX22_ENV)
QInit(&afs_vhashTV[i]);
}
-/*
- * shutdown_vcache
- *
+/*!
+ * Shutdown vcache.
*/
void
shutdown_vcache(void)
}
afs_cbrSpace = 0;
-#ifdef KERNEL_HAVE_PIN
- unpin(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
-#endif
#if !defined(AFS_OSF_ENV) && !defined(AFS_LINUX22_ENV)
afs_osi_Free(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
#endif
+#ifdef KERNEL_HAVE_PIN
+ unpin(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache));
+#endif
#if !defined(AFS_OSF_ENV) && !defined(AFS_LINUX22_ENV)
freeVCList = Initial_freeVCList = 0;
#endif
- RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
+ AFS_RWLOCK_INIT(&afs_xvcache, "afs_xvcache");
LOCK_INIT(&afs_xvcb, "afs_xvcb");
QInit(&VLRU);
for(i = 0; i < VCSIZE; ++i)
QInit(&afs_vhashTV[i]);
}
+
+#ifdef AFS_DISCON_ENV
+void afs_DisconGiveUpCallbacks() {
+ int i;
+ struct vcache *tvc;
+ int nq=0;
+
+ ObtainWriteLock(&afs_xvcache, 1002); /* XXX - should be a unique number */
+
+ /* Somehow, walk the set of vcaches, with each one coming out as tvc */
+ for (i = 0; i < VCSIZE; i++) {
+ for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
+ if ((tvc->states & CRO) == 0 && tvc->callback) {
+ afs_QueueVCB(tvc);
+ tvc->callback = NULL;
+ nq++;
+ }
+ }
+ }
+ /*printf("%d callbacks to be discarded. queued ... ", nq);*/
+ afs_FlushVCBs(0);
+
+ ReleaseWriteLock(&afs_xvcache);
+ /*printf("gone\n");*/
+}
+
+#endif
git://git.openafs.org / openafs.git / blobdiff