* afs_WriteVCacheDiscon
* afs_SimpleVStat
* afs_ProcessFS
- * TellALittleWhiteLie
* afs_RemoteLookup
* afs_GetVCache
* afs_LookupVCache
static struct afs_slotlist *afs_freeSlotList = NULL;
/* Forward declarations */
-static afs_int32 afs_QueueVCB(struct vcache *avc);
+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.
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;
/* OK, there are no internal vrefCounts, so there shouldn't
* be any more refs here. */
if (avc->v) {
-#ifdef AFS_DARWIN80_ENV
+# ifdef AFS_DARWIN80_ENV
vnode_clearfsnode(AFSTOV(avc));
vnode_removefsref(AFSTOV(avc));
-#else
+# else
avc->v->v_data = NULL; /* remove from vnode */
-#endif
+# endif
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));
- afs_QueueVCB(avc);
- 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);
+ 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);
/*
* 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)) {
struct afs_cbr *tsp;
int i;
- if (!afs_cbrSpace) {
- afs_osi_CancelWait(&AFS_WaitHandler); /* trigger FlushVCBs asap */
-
+ while (!afs_cbrSpace) {
if (afs_stats_cmperf.CallBackAlloced >= sizeof(afs_cbrHeads)/sizeof(afs_cbrHeads[0])) {
/* don't allocate more than 16 * AFS_NCBRS for now */
- tsp = (struct afs_cbr *)osi_AllocSmallSpace(sizeof(*tsp));
- tsp->dynalloc = 1;
- tsp->next = NULL;
+ afs_FlushVCBs(0);
afs_stats_cmperf.CallBackFlushes++;
} else {
/* try allocating */
osi_Assert(tsp != NULL);
for (i = 0; i < AFS_NCBRS - 1; i++) {
tsp[i].next = &tsp[i + 1];
- tsp[i].dynalloc = 0;
}
tsp[AFS_NCBRS - 1].next = 0;
- tsp[AFS_NCBRS - 1].dynalloc = 0;
- afs_cbrSpace = tsp->next;
+ afs_cbrSpace = tsp;
afs_cbrHeads[afs_stats_cmperf.CallBackAlloced] = tsp;
afs_stats_cmperf.CallBackAlloced++;
}
- } else {
- tsp = afs_cbrSpace;
- afs_cbrSpace = tsp->next;
}
+ tsp = afs_cbrSpace;
+ afs_cbrSpace = tsp->next;
return tsp;
}
if (asp->hash_next)
asp->hash_next->hash_pprev = asp->hash_pprev;
- if (asp->dynalloc) {
- osi_FreeSmallSpace(asp);
- } else {
- asp->next = afs_cbrSpace;
- afs_cbrSpace = asp;
- }
+ asp->next = afs_cbrSpace;
+ afs_cbrSpace = asp;
return 0;
}
+static void
+FlushAllVCBs(int nconns, struct rx_connection **rxconns,
+ struct afs_conn **conns)
+{
+ afs_int32 *results;
+ afs_int32 i;
+
+ results = afs_osi_Alloc(nconns * sizeof (afs_int32));
+ osi_Assert(results != NULL);
+
+ AFS_GUNLOCK();
+ multi_Rx(rxconns,nconns)
+ {
+ multi_RXAFS_GiveUpAllCallBacks();
+ results[multi_i] = multi_error;
+ } multi_End;
+ AFS_GLOCK();
+
+ /*
+ * Freeing the CBR will unlink it from the server's CBR list
+ * do it here, not in the loop, because a dynamic CBR will call
+ * into the memory management routines.
+ */
+ for ( i = 0 ; i < nconns ; i++ ) {
+ if (results[i] == 0) {
+ /* Unchain all of them */
+ while (conns[i]->parent->srvr->server->cbrs)
+ afs_FreeCBR(conns[i]->parent->srvr->server->cbrs);
+ }
+ }
+ afs_osi_Free(results, nconns * sizeof(afs_int32));
+}
+
/*!
* Flush all queued callbacks to all servers.
*
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 ((code = afs_InitReq(&treq, afs_osi_credp)))
+
+ if (AFS_IS_DISCONNECTED)
+ return ENETDOWN;
+
+ 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);
if (lockit)
ObtainWriteLock(&afs_xvcb, 273);
+ /*
+ * Shutting down.
+ * First, attempt a multi across everything, all addresses
+ * for all servers we know of.
+ */
+
+ if (lockit == 2)
+ afs_LoopServers(AFS_LS_ALL, NULL, 0, FlushAllVCBs, NULL);
+
ObtainReadLock(&afs_xserver);
for (i = 0; i < NSERVERS; i++) {
for (safety1 = 0, tsp = afs_servers[i];
tcount = 0; /* number found so far */
for (safety2 = 0; safety2 < afs_cacheStats; safety2++) {
if (tcount >= AFS_MAXCBRSCALL || !tsp->cbrs) {
+ struct rx_connection *rxconn;
/* if buffer is full, or we've queued all we're going
* to from this server, we should flush out the
* callbacks.
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);
+ tsp->cell->cellNum, treq, 0,
+ SHARED_LOCK, 0, &rxconn);
if (tc) {
XSTATS_START_TIME
(AFS_STATS_FS_RPCIDX_GIVEUPCALLBACKS);
RX_AFS_GUNLOCK();
code =
- RXAFS_GiveUpCallBacks(tc->id, &fidArray,
+ RXAFS_GiveUpCallBacks(rxconn, &fidArray,
&cbArray);
RX_AFS_GLOCK();
XSTATS_END_TIME;
} else
code = -1;
if (!afs_Analyze
- (tc, 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;
}
* Environment:
* Locks the xvcb lock.
* Called when the xvcache lock is already held.
+ * RACE: afs_xvcache may be dropped and reacquired
*
* \param avc vcache entry
+ * \param slep Set to 1 if we dropped afs_xvcache
* \return 1 if queued, 0 otherwise
*/
static afs_int32
-afs_QueueVCB(struct vcache *avc)
+afs_QueueVCB(struct vcache *avc, int *slept)
{
int queued = 0;
struct server *tsp;
struct afs_cbr *tcbp;
+ int reacquire = 0;
AFS_STATCNT(afs_QueueVCB);
/* The callback is really just a struct server ptr. */
tsp = (struct server *)(avc->callback);
+ if (!afs_cbrSpace) {
+ /* If we don't have CBR space, AllocCBR may block or hit the net for
+ * clearing up CBRs. Hitting the net may involve a fileserver
+ * needing to contact us, so we must drop xvcache so we don't block
+ * those requests from going through. */
+ reacquire = *slept = 1;
+ ReleaseWriteLock(&afs_xvcache);
+ }
+
/* we now have a pointer to the server, so we just allocate
* a queue entry and queue it.
*/
done:
/* now release locks and return */
ReleaseWriteLock(&afs_xvcb);
+
+ if (reacquire) {
+ /* make sure this is after dropping xvcb, for locking order */
+ ObtainWriteLock(&afs_xvcache, 279);
+ }
return queued;
}
/* printf("Reclaim list flush %lx failed: %d\n", (unsigned long) tvc, code); */
}
if (tvc->f.states & (CVInit
-#ifdef AFS_DARWIN80_ENV
+# ifdef AFS_DARWIN80_ENV
| CDeadVnode
-#endif
+# endif
)) {
tvc->f.states &= ~(CVInit
-#ifdef AFS_DARWIN80_ENV
+# ifdef AFS_DARWIN80_ENV
| CDeadVnode
-#endif
+# endif
);
afs_osi_Wakeup(&tvc->f.states);
}
/*
* 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;
+ 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))
+ 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;
+ goto retry;
+ }
break;
+ }
}
if (!afsd_dynamic_vcaches && anumber == target) {
afs_warn("afs_ShakeLooseVCaches: warning none freed, using %d of %d\n",
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 */
#endif
}
+void
+afs_FlushAllVCaches(void)
+{
+ int i;
+ struct vcache *tvc, *nvc;
+
+ ObtainWriteLock(&afs_xvcache, 867);
+
+ retry:
+ for (i = 0; i < VCSIZE; i++) {
+ for (tvc = afs_vhashT[i]; tvc; tvc = nvc) {
+ int slept;
+
+ nvc = tvc->hnext;
+ if (afs_FlushVCache(tvc, &slept)) {
+ afs_warn("Failed to flush vcache 0x%lx\n", (unsigned long)(uintptrsz)tvc);
+ }
+ if (slept) {
+ goto retry;
+ }
+ }
+ }
+
+ ReleaseWriteLock(&afs_xvcache);
+}
+
/*!
* This routine is responsible for allocating a new cache entry
* from the free list. It formats the cache entry and inserts it
afs_FlushReclaimedVcaches();
#if defined(AFS_LINUX22_ENV)
- if(!afsd_dynamic_vcaches) {
+ if(!afsd_dynamic_vcaches && afs_vcount >= afs_maxvcount) {
afs_ShakeLooseVCaches(anumber);
if (afs_vcount >= afs_maxvcount) {
afs_warn("afs_NewVCache - none freed\n");
tvc = freeVCList; /* take from free list */
freeVCList = tvc->nextfree;
tvc->nextfree = NULL;
+ afs_vcount++; /* balanced by FlushVCache */
} /* end of if (!freeVCList) */
#endif /* AFS_LINUX22_ENV */
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) {
tvc->flockCount)) panic("Dead vnode has core/unlinkedel/flock");
#endif
if (doflocks && tvc->flockCount != 0) {
+ struct rx_connection *rxconn;
/* if this entry has an flock, send a keep-alive call out */
osi_vnhold(tvc, 0);
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);
+ tc = afs_Conn(&tvc->f.fid, treq, SHARED_LOCK, &rxconn);
if (tc) {
XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_EXTENDLOCK);
RX_AFS_GUNLOCK();
code =
- RXAFS_ExtendLock(tc->id,
+ RXAFS_ExtendLock(rxconn,
(struct AFSFid *)&tvc->f.fid.Fid,
&tsync);
RX_AFS_GLOCK();
} else
code = -1;
} while (afs_Analyze
- (tc, 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;
struct afs_conn *tc;
struct AFSFetchStatus OutStatus;
struct AFSVolSync tsync;
+ struct rx_connection *rxconn;
XSTATS_DECLS;
AFS_STATCNT(afs_WriteVCache);
afs_Trace2(afs_iclSetp, CM_TRACE_WVCACHE, ICL_TYPE_POINTER, avc,
ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length));
do {
- tc = afs_Conn(&avc->f.fid, areq, SHARED_LOCK);
+ tc = afs_Conn(&avc->f.fid, areq, SHARED_LOCK, &rxconn);
if (tc) {
XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STORESTATUS);
RX_AFS_GUNLOCK();
code =
- RXAFS_StoreStatus(tc->id, (struct AFSFid *)&avc->f.fid.Fid,
+ RXAFS_StoreStatus(rxconn, (struct AFSFid *)&avc->f.fid.Fid,
astatus, &OutStatus, &tsync);
RX_AFS_GLOCK();
XSTATS_END_TIME;
} else
code = -1;
} while (afs_Analyze
- (tc, code, &avc->f.fid, areq, AFS_STATS_FS_RPCIDX_STORESTATUS,
+ (tc, rxconn, code, &avc->f.fid, areq, AFS_STATS_FS_RPCIDX_STORESTATUS,
SHARED_LOCK, NULL));
UpgradeSToWLock(&avc->lock, 20);
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;
if (astatus->Mask & AFS_SETMODE) {
avc->f.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->f.m.Mode |= S_IFREG;
- } else if (vType(avc) == VDIR) {
- avc->f.m.Mode |= S_IFDIR;
- } else if (vType(avc) == VLNK) {
- avc->f.m.Mode |= S_IFLNK;
- if ((avc->f.m.Mode & 0111) == 0)
- avc->mvstat = 1;
- }
-#endif
flags |= VDisconSetMode;
} /* if(astatus.Mask & AFS_SETMODE) */
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;
struct AFSVolSync *tsyncp)
{
afs_int32 code;
- afs_uint32 start;
struct afs_conn *tc;
+ struct rx_connection *rxconn;
struct AFSFetchStatus OutDirStatus;
XSTATS_DECLS;
if (!name)
name = ""; /* XXX */
do {
- tc = afs_Conn(afid, areq, SHARED_LOCK);
+ tc = afs_Conn(afid, areq, SHARED_LOCK, &rxconn);
if (tc) {
if (serverp)
- *serverp = tc->srvr->server;
- start = osi_Time();
+ *serverp = tc->parent->srvr->server;
XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_XLOOKUP);
RX_AFS_GUNLOCK();
code =
- RXAFS_Lookup(tc->id, (struct AFSFid *)&afid->Fid, name,
+ RXAFS_Lookup(rxconn, (struct AFSFid *)&afid->Fid, name,
(struct AFSFid *)&nfid->Fid, OutStatusp,
&OutDirStatus, CallBackp, tsyncp);
RX_AFS_GLOCK();
} else
code = -1;
} while (afs_Analyze
- (tc, code, afid, areq, AFS_STATS_FS_RPCIDX_XLOOKUP, SHARED_LOCK,
+ (tc, rxconn, code, afid, areq, AFS_STATS_FS_RPCIDX_XLOOKUP, SHARED_LOCK,
NULL));
return code;
* \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)) {
/* Darwin 8.0 only has bufs in nfs, so we shouldn't have to worry about them.
What about ubc? */
#else
-#if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
+# if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
/*
* XXX - I really don't like this. Should try to understand better.
* It seems that sometimes, when we get called, we already hold the
struct vnode *vp = AFSTOV(tvc);
int iheldthelock;
-#if defined(AFS_DARWIN_ENV)
+# if defined(AFS_DARWIN_ENV)
iheldthelock = VOP_ISLOCKED(vp);
if (!iheldthelock)
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, current_proc());
ObtainWriteLock(&tvc->lock, 954);
if (!iheldthelock)
VOP_UNLOCK(vp, LK_EXCLUSIVE, current_proc());
-#elif defined(AFS_FBSD80_ENV)
+# elif defined(AFS_FBSD_ENV)
+ AFS_GUNLOCK();
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, PINOD, 0); /* changed late in 8.0-CURRENT */
if (!iheldthelock)
VOP_UNLOCK(vp, 0);
-#elif defined(AFS_FBSD60_ENV)
- iheldthelock = VOP_ISLOCKED(vp, curthread);
- if (!iheldthelock)
- vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread);
- vinvalbuf(vp, V_SAVE, curthread, PINOD, 0);
- if (!iheldthelock)
- VOP_UNLOCK(vp, LK_EXCLUSIVE, curthread);
-#elif defined(AFS_FBSD_ENV)
- iheldthelock = VOP_ISLOCKED(vp, curthread);
- if (!iheldthelock)
- vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread);
- vinvalbuf(vp, V_SAVE, osi_curcred(), curthread, PINOD, 0);
- if (!iheldthelock)
- VOP_UNLOCK(vp, LK_EXCLUSIVE, curthread);
-#elif defined(AFS_OBSD_ENV)
+ AFS_GLOCK();
+# elif defined(AFS_OBSD_ENV)
iheldthelock = VOP_ISLOCKED(vp, curproc);
if (!iheldthelock)
VOP_LOCK(vp, LK_EXCLUSIVE | LK_RETRY, curproc);
uvm_vnp_uncache(vp);
if (!iheldthelock)
VOP_UNLOCK(vp, 0, curproc);
-#elif defined(AFS_NBSD40_ENV)
+# elif defined(AFS_NBSD40_ENV)
iheldthelock = VOP_ISLOCKED(vp);
if (!iheldthelock) {
VOP_LOCK(vp, LK_EXCLUSIVE | LK_RETRY);
uvm_vnp_uncache(vp);
if (!iheldthelock)
VOP_UNLOCK(vp, 0);
-#endif
+# endif
}
-#endif
+# 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
struct afs_conn *tc;
struct AFSCallBack CallBack;
struct AFSVolSync tsync;
+ struct rx_connection *rxconn;
XSTATS_DECLS;
do {
- tc = afs_Conn(afid, areq, SHARED_LOCK);
+ tc = afs_Conn(afid, areq, SHARED_LOCK, &rxconn);
avc->dchint = NULL; /* invalidate hints */
if (tc) {
- avc->callback = tc->srvr->server;
+ avc->callback = tc->parent->srvr->server;
start = osi_Time();
XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_FETCHSTATUS);
RX_AFS_GUNLOCK();
code =
- RXAFS_FetchStatus(tc->id, (struct AFSFid *)&afid->Fid, Outsp,
+ RXAFS_FetchStatus(rxconn, (struct AFSFid *)&afid->Fid, Outsp,
&CallBack, &tsync);
RX_AFS_GLOCK();
XSTATS_END_TIME;
+ if (code == 0) {
+ code = afs_CheckFetchStatus(tc, Outsp);
+ }
+
} else
code = -1;
} while (afs_Analyze
- (tc, code, afid, areq, AFS_STATS_FS_RPCIDX_FETCHSTATUS,
+ (tc, rxconn, code, afid, areq, AFS_STATS_FS_RPCIDX_FETCHSTATUS,
SHARED_LOCK, NULL));
if (!code) {
return code;
}
-#if 0
-/*
- * afs_StuffVcache
- *
- * Description:
- * Stuff some information into the vcache for the given file.
- *
- * Parameters:
- * afid : File in question.
- * OutStatus : Fetch status on the file.
- * CallBack : Callback info.
- * tc : RPC connection involved.
- * areq : vrequest involved.
- *
- * Environment:
- * Nothing interesting.
- */
-void
-afs_StuffVcache(struct VenusFid *afid,
- struct AFSFetchStatus *OutStatus,
- struct AFSCallBack *CallBack, struct afs_conn *tc,
- struct vrequest *areq)
-{
- afs_int32 code, i, newvcache = 0;
- struct vcache *tvc;
- struct AFSVolSync tsync;
- struct volume *tvp;
- struct axscache *ac;
- afs_int32 retry;
-
- AFS_STATCNT(afs_StuffVcache);
-#ifdef IFS_VCACHECOUNT
- ifs_gvcachecall++;
-#endif
-
- loop:
- ObtainSharedLock(&afs_xvcache, 8);
-
- tvc = afs_FindVCache(afid, &retry, DO_VLRU| IS_SLOCK /* no stats */ );
- if (tvc && retry) {
-#if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
- ReleaseSharedLock(&afs_xvcache);
- spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
- goto loop;
-#endif
- }
-
- if (!tvc) {
- /* no cache entry, better grab one */
- UpgradeSToWLock(&afs_xvcache, 25);
- tvc = afs_NewVCache(afid, NULL);
- newvcache = 1;
- ConvertWToSLock(&afs_xvcache);
- if (!tvc)
- {
- ReleaseSharedLock(&afs_xvcache);
- return NULL;
- }
- }
-
- 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 */
-
- /* Is it always appropriate to throw away all the access rights? */
- afs_FreeAllAxs(&(tvc->Access));
-
- /*Copy useful per-volume info */
- tvp = afs_GetVolume(afid, areq, READ_LOCK);
- if (tvp) {
- if (newvcache && (tvp->states & VForeign))
- tvc->f.states |= CForeign;
- 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 *)
- osi_AllocSmallSpace(sizeof(struct VenusFid));
- *tvc->mvid = tvp->dotdot;
- }
- }
- /* store the stat on the file */
- afs_RemoveVCB(afid);
- afs_ProcessFS(tvc, OutStatus, areq);
- tvc->callback = tc->srvr->server;
-
- /* we use osi_Time twice below. Ideally, we would use the time at which
- * the FetchStatus call began, instead, but we don't have it here. So we
- * make do with "now". In the CRO case, it doesn't really matter. In
- * the other case, we hope that the difference between "now" and when the
- * call actually began execution on the server won't be larger than the
- * padding which the server keeps. Subtract 1 second anyway, to be on
- * the safe side. Can't subtract more because we don't know how big
- * ExpirationTime is. Possible consistency problems may arise if the call
- * timeout period becomes longer than the server's expiration padding. */
- ObtainWriteLock(&afs_xcbhash, 470);
- if (CallBack->ExpirationTime != 0) {
- tvc->cbExpires = CallBack->ExpirationTime + osi_Time() - 1;
- tvc->f.states |= CStatd;
- tvc->f.states &= ~CBulkFetching;
- afs_QueueCallback(tvc, CBHash(CallBack->ExpirationTime), tvp);
- } else if (tvc->f.states & CRO) {
- /* old-fashioned AFS 3.2 style */
- tvc->cbExpires = 3600 + osi_Time();
- /*XXX*/ tvc->f.states |= CStatd;
- 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 */
- }
- ReleaseWriteLock(&afs_xcbhash);
- if (tvp)
- afs_PutVolume(tvp, READ_LOCK);
-
- /* look in per-pag cache */
- if (tvc->Access && (ac = afs_FindAxs(tvc->Access, areq->uid)))
- ac->axess = OutStatus->CallerAccess; /* substitute pags */
- else /* not found, add a new one if possible */
- afs_AddAxs(tvc->Access, areq->uid, OutStatus->CallerAccess);
-
- ReleaseWriteLock(&tvc->lock);
- afs_Trace4(afs_iclSetp, CM_TRACE_STUFFVCACHE, ICL_TYPE_POINTER, tvc,
- ICL_TYPE_POINTER, tvc->callback, ICL_TYPE_INT32,
- tvc->cbExpires, ICL_TYPE_INT32, tvc->cbExpires - osi_Time());
- /*
- * Release ref count... hope this guy stays around...
- */
- afs_PutVCache(tvc);
-} /*afs_StuffVcache */
-#endif
-
/*!
* Decrements the reference count on a cache entry.
*
*
* \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 {
struct vcache *tvc;
afs_int32 i;
#ifdef AFS_DARWIN80_ENV
+ struct vcache *deadvc = NULL, *livevc = NULL;
vnode_t tvp;
#endif
if (tvc->f.states & CVInit) {
findvc_sleep(tvc, flag);
goto findloop;
- }
-#ifdef AFS_DARWIN80_ENV
- if (tvc->f.states & CDeadVnode) {
- if (!(flag & FIND_CDEAD)) {
- findvc_sleep(tvc, flag);
- goto findloop;
- }
- }
- 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;
- }
- if (tvc->f.states & (CBulkFetching|CDeadVnode)) {
- AFS_GUNLOCK();
- vnode_recycle(AFSTOV(tvc));
- AFS_GLOCK();
}
+#ifdef AFS_DARWIN80_ENV
+ if (tvc->f.states & CDeadVnode) {
+ findvc_sleep(tvc, flag);
+ goto findloop;
+ }
#endif
break;
}
if (tvc) {
if (retry)
*retry = 0;
-#if !defined(AFS_DARWIN80_ENV)
- osi_vnhold(tvc, retry); /* already held, above */
- if (retry && *retry)
- return 0;
-#endif
-#if defined(AFS_DARWIN_ENV) && !defined(AFS_DARWIN80_ENV)
+#if defined(AFS_DARWIN80_ENV)
+ tvp = AFSTOV(tvc);
+ if (vnode_get(tvp))
+ tvp = NULL;
+ if (tvp && vnode_ref(tvp)) {
+ AFS_GUNLOCK();
+ /* AFSTOV(tvc) may be NULL */
+ vnode_put(tvp);
+ AFS_GLOCK();
+ tvp = NULL;
+ }
+ if (!tvp) {
+ tvc = NULL;
+ return tvc;
+ }
+#elif defined(AFS_DARWIN_ENV)
tvc->f.states |= CUBCinit;
AFS_GUNLOCK();
if (UBCINFOMISSING(AFSTOV(tvc)) ||
}
AFS_GLOCK();
tvc->f.states &= ~CUBCinit;
+#else
+ osi_vnhold(tvc, retry); /* already held, above */
+ if (retry && *retry)
+ return 0;
#endif
/*
* only move to front of vlru if we have proper vcache locking)
}
#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) {
tvc = found_tvc;
/* should I have a read lock on the vnode here? */
if (tvc) {
-#if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
+#ifndef AFS_DARWIN80_ENV
+# if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
afs_int32 retry = 0;
osi_vnhold(tvc, &retry);
if (retry) {
spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD);
goto loop;
}
-#else
+# else
osi_vnhold(tvc, (int *)0); /* already held, above */
+# endif
#endif
/*
* We obtained the xvcache lock above.
tvc->vc_rwlockid = OSI_NO_LOCKID;
initnsema(&tvc->vc_rwlock, 1,
makesname(name, "vrw", tvc->v.v_number));
-#ifndef AFS_SGI53_ENV
+# ifndef AFS_SGI53_ENV
initnsema(&tvc->v.v_sync, 0, makesname(name, "vsy", tvc->v.v_number));
-#endif
-#ifndef AFS_SGI62_ENV
+# endif
+# ifndef AFS_SGI62_ENV
initnlock(&tvc->v.v_lock, makesname(name, "vlk", tvc->v.v_number));
-#endif /* AFS_SGI62_ENV */
+# endif /* AFS_SGI62_ENV */
}
#endif
QInit(&VLRU);
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)
afs_osi_Free(tvc->v.v_gnode, sizeof(struct gnode));
-#ifdef AFS_AIX32_ENV
+# ifdef AFS_AIX32_ENV
if (tvc->segid) {
AFS_GUNLOCK();
vms_delete(tvc->segid);
crfree(tvc->credp);
tvc->credp = NULL;
}
-#endif
+# endif
#endif
#if defined(AFS_SUN5_ENV)
if (tvc->credp) {
ObtainWriteLock(&afs_xvcache, 1002); /* XXX - should be a unique number */
+ retry:
/* 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 (afs_QueueVCB(tvc)) {
+ int slept = 0;
+ if (afs_QueueVCB(tvc, &slept)) {
tvc->callback = NULL;
nq++;
}
+ if (slept) {
+ goto retry;
+ }
}
}
ReleaseWriteLock(&afs_xvcache);
- afs_FlushVCBs(1);
+ afs_FlushVCBs(2);
}
/*!
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