#endif /* AFS_SGI64_ENV */
/* Exported variables */
-#ifdef AFS_DISCON_ENV
afs_rwlock_t afs_xvcdirty; /*Lock: discon vcache dirty list mgmt */
-#endif
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 */
int afs_norefpanic = 0;
-/* Disk backed vcache definitions
+/* Disk backed vcache definitions
* Both protected by xvcache */
-#ifdef AFS_DISCON_ENV
static int afs_nextVcacheSlot = 0;
static struct afs_slotlist *afs_freeSlotList = NULL;
-#endif
/* Forward declarations */
-static afs_int32 afs_QueueVCB(struct vcache *avc);
+static afs_int32 afs_QueueVCB(struct vcache *avc, int *slept);
/*!
* Generate an index into the hash table for a given Fid.
- * \param fid
+ * \param fid
* \return The hash value.
*/
static int
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;
}
}
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);
else
osi_dnlc_purgevp(avc);
+ /* 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_QueueVCB(avc, slept);
+
/*
* Next, keep track of which vnodes we've deleted for create's
* optimistic synchronization algorithm
/*!
* The core of the inactive vnode op for all but IRIX.
*
- * \param avc
+ * \param avc
* \param acred
*/
void
*/
static struct afs_cbr *afs_cbrSpace = 0;
/* if alloc limit below changes, fix me! */
-static struct afs_cbr *afs_cbrHeads[2];
+static struct afs_cbr *afs_cbrHeads[16];
struct afs_cbr *
afs_AllocCBR(void)
{
- register struct afs_cbr *tsp;
+ struct afs_cbr *tsp;
int i;
while (!afs_cbrSpace) {
- if (afs_stats_cmperf.CallBackAlloced >= 2) {
- /* don't allocate more than 2 * AFS_NCBRS for now */
+ if (afs_stats_cmperf.CallBackAlloced >= sizeof(afs_cbrHeads)/sizeof(afs_cbrHeads[0])) {
+ /* don't allocate more than 16 * AFS_NCBRS for now */
afs_FlushVCBs(0);
afs_stats_cmperf.CallBackFlushes++;
} else {
/* try allocating */
- tsp =
- (struct afs_cbr *)afs_osi_Alloc(AFS_NCBRS *
- sizeof(struct afs_cbr));
+ tsp = afs_osi_Alloc(AFS_NCBRS * sizeof(struct afs_cbr));
+ osi_Assert(tsp != NULL);
for (i = 0; i < AFS_NCBRS - 1; i++) {
tsp[i].next = &tsp[i + 1];
}
* \rerurn 0
*/
int
-afs_FreeCBR(register struct afs_cbr *asp)
+afs_FreeCBR(struct afs_cbr *asp)
{
*(asp->pprev) = asp->next;
if (asp->next)
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;
}
ReleaseWriteLock(&afs_xvcb);
}
-void
+void
afs_FlushReclaimedVcaches(void)
{
#if !defined(AFS_LINUX22_ENV)
struct vcache *tvc;
int code, fv_slept;
- struct vcache *tmpReclaimedVCList = NULL;
+ struct vcache *tmpReclaimedVCList = NULL;
ObtainWriteLock(&afs_xvreclaim, 76);
while (ReclaimedVCList) {
afs_osi_Wakeup(&tvc->f.states);
}
}
- if (tmpReclaimedVCList)
+ if (tmpReclaimedVCList)
ReclaimedVCList = tmpReclaimedVCList;
ReleaseWriteLock(&afs_xvreclaim);
afs_int32 i, loop;
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) {
+ continue;
}
fv_slept = 0;
- if (osi_TryEvictVCache(tvc, &fv_slept))
+ if (osi_TryEvictVCache(tvc, &fv_slept, defersleep))
anumber--;
if (fv_slept) {
if (loop++ > 100)
break;
- uq = VLRU.prev;
- i = 0;
- continue; /* start over - may have raced. */
+ 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",
/* Alloc new vnode. */
static struct vcache *
-afs_AllocVCache(void)
+afs_AllocVCache(void)
{
struct vcache *tvc;
afs_stats_cmperf.vcacheXAllocs++; /* count in case we have a leak */
-#ifdef AFS_DISCON_ENV
/* If we create a new inode, we either give it a new slot number,
* or if one's available, use a slot number from the slot free list
*/
if (afs_freeSlotList != NULL) {
struct afs_slotlist *tmp;
-
+
tvc->diskSlot = afs_freeSlotList->slot;
tmp = afs_freeSlotList;
afs_freeSlotList = tmp->next;
} else {
tvc->diskSlot = afs_nextVcacheSlot++;
}
-#endif
return tvc;
}
afs_PrePopulateVCache(struct vcache *avc, struct VenusFid *afid,
struct server *serverp) {
-#if defined(AFS_DISCON_ENV)
afs_uint32 slot;
slot = avc->diskSlot;
-#endif
osi_PrePopulateVCache(avc);
-#if defined(AFS_DISCON_ENV)
avc->diskSlot = slot;
QZero(&avc->metadirty);
-#endif
AFS_RWLOCK_INIT(&avc->lock, "vcache lock");
#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 */
tvc->hnext = afs_vhashT[i];
afs_vhashT[i] = tvc;
QAdd(&afs_vhashTV[j], &tvc->vhashq);
-
+
if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) {
refpanic("NewVCache VLRU inconsistent");
}
#if defined(AFS_LINUX22_ENV)
/* Hold it for the LRU (should make count 2) */
- VN_HOLD(AFSTOV(tvc));
+ AFS_FAST_HOLD(tvc);
#elif !(defined (AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV))
VREFCOUNT_SET(tvc, 1); /* us */
#endif
+#if defined (AFS_FBSD_ENV)
+ if (tvc->f.states & CVInit)
+#endif
afs_PostPopulateVCache(tvc, afid, seq);
return tvc;
* \param doflocks : Do we handle flocks?
*/
void
-afs_FlushActiveVcaches(register afs_int32 doflocks)
+afs_FlushActiveVcaches(afs_int32 doflocks)
{
- register struct vcache *tvc;
- register int i;
- register struct afs_conn *tc;
- register afs_int32 code;
+ struct vcache *tvc;
+ int i;
+ 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);
}
*/
/*!
- *
+ *
* 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.
int
afs_VerifyVCache2(struct vcache *avc, struct vrequest *areq)
{
- register struct vcache *tvc;
+ struct vcache *tvc;
AFS_STATCNT(afs_VerifyVCache);
*
*/
static void
-afs_SimpleVStat(register struct vcache *avc,
- register struct AFSFetchStatus *astat, struct vrequest *areq)
+afs_SimpleVStat(struct vcache *avc,
+ struct AFSFetchStatus *astat, struct vrequest *areq)
{
afs_size_t length;
AFS_STATCNT(afs_SimpleVStat);
*/
int
-afs_WriteVCache(register struct vcache *avc,
- register struct AFSStoreStatus *astatus,
+afs_WriteVCache(struct vcache *avc,
+ struct AFSStoreStatus *astatus,
struct vrequest *areq)
{
afs_int32 code;
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);
return code;
} /*afs_WriteVCache */
-#if defined(AFS_DISCON_ENV)
/*!
* Store status info only locally, set the proper disconnection flags
* \note Must be called with a shared lock on the vnode
*/
int
-afs_WriteVCacheDiscon(register struct vcache *avc,
- register struct AFSStoreStatus *astatus,
+afs_WriteVCacheDiscon(struct vcache *avc,
+ struct AFSStoreStatus *astatus,
struct vattr *attrs)
{
afs_int32 code = 0;
return code;
}
-#endif
-
/*!
* Copy astat block into vcache info
*
* \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
+ * 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 areq Ptr to associated request.
*/
void
-afs_ProcessFS(register struct vcache *avc,
- register struct AFSFetchStatus *astat, struct vrequest *areq)
+afs_ProcessFS(struct vcache *avc,
+ struct AFSFetchStatus *astat, struct vrequest *areq)
{
afs_size_t length;
AFS_STATCNT(afs_ProcessFS);
/*!
* Get fid from server.
*
- * \param afid
+ * \param afid
* \param areq Request to be passed on.
* \param name Name of ?? to lookup.
* \param OutStatus Fetch status.
- * \param CallBackp
+ * \param CallBackp
* \param serverp
* \param tsyncp
*
* \return Success status of operation.
*/
int
-afs_RemoteLookup(register struct VenusFid *afid, struct vrequest *areq,
+afs_RemoteLookup(struct VenusFid *afid, struct vrequest *areq,
char *name, struct VenusFid *nfid,
struct AFSFetchStatus *OutStatusp,
struct AFSCallBack *CallBackp, struct server **serverp,
struct AFSVolSync *tsyncp)
{
afs_int32 code;
- afs_uint32 start;
- register struct afs_conn *tc;
+ struct afs_conn *tc;
+ struct rx_connection *rxconn;
struct AFSFetchStatus OutDirStatus;
XSTATS_DECLS;
if (!name)
- name = ""; /* XXX */
+ 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;
* 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.
- *
+ *
* \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
+ * already be held by the caller
*/
struct vcache *
-afs_GetVCache(register struct VenusFid *afid, struct vrequest *areq,
+afs_GetVCache(struct VenusFid *afid, struct vrequest *areq,
afs_int32 * cached, struct vcache *avc)
{
afs_int32 code, newvcache = 0;
- register struct vcache *tvc;
+ struct vcache *tvc;
struct volume *tvp;
afs_int32 retry;
if (!iheldthelock)
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, current_proc());
/* this is messy. we can call fsync which will try to reobtain this */
- if (VTOAFS(vp) == tvc)
+ if (VTOAFS(vp) == tvc)
ReleaseWriteLock(&tvc->lock);
if (UBCINFOEXISTS(vp)) {
vinvalbuf(vp, V_SAVE, &afs_osi_cred, current_proc(), PINOD, 0);
}
- if (VTOAFS(vp) == tvc)
+ if (VTOAFS(vp) == tvc)
ObtainWriteLock(&tvc->lock, 954);
if (!iheldthelock)
VOP_UNLOCK(vp, LK_EXCLUSIVE, current_proc());
iheldthelock = VOP_ISLOCKED(vp, curthread);
if (!iheldthelock)
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread);
+ AFS_GUNLOCK();
vinvalbuf(vp, V_SAVE, curthread, PINOD, 0);
+ AFS_GLOCK();
if (!iheldthelock)
VOP_UNLOCK(vp, LK_EXCLUSIVE, curthread);
-#elif defined(AFS_FBSD50_ENV)
+#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_FBSD40_ENV)
- iheldthelock = VOP_ISLOCKED(vp, curproc);
- if (!iheldthelock)
- vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curproc);
- vinvalbuf(vp, V_SAVE, osi_curcred(), curproc, PINOD, 0);
- if (!iheldthelock)
- VOP_UNLOCK(vp, LK_EXCLUSIVE, curproc);
#elif defined(AFS_OBSD_ENV)
iheldthelock = VOP_ISLOCKED(vp, curproc);
if (!iheldthelock)
* 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 areq
* \param cached Is element cached? If NULL, don't answer.
* \param adp
* \param aname
{
afs_int32 code, now, newvcache = 0;
struct VenusFid nfid;
- register struct vcache *tvc;
+ struct vcache *tvc;
struct volume *tvp;
struct AFSFetchStatus OutStatus;
struct AFSCallBack CallBack;
nfid = *afid;
now = osi_Time();
origCBs = afs_allCBs; /* if anything changes, we don't have a cb */
-
+
if (AFS_IS_DISCONNECTED) {
/* printf("Network is down in afs_LookupVcache\n"); */
code = ENETDOWN;
- } else
+ } else
code =
- afs_RemoteLookup(&adp->f.fid, areq, aname, &nfid, &OutStatus,
+ afs_RemoteLookup(&adp->f.fid, areq, aname, &nfid, &OutStatus,
&CallBack, &serverp, &tsync);
#if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
afs_int32 getNewFid = 0;
afs_uint32 start;
struct VenusFid nfid;
- register struct vcache *tvc;
+ struct vcache *tvc;
struct server *serverp = 0;
struct AFSFetchStatus OutStatus;
struct AFSCallBack CallBack;
}
#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;
}
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
{
int code;
afs_uint32 start = 0;
- register struct afs_conn *tc;
+ 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) {
* Nothing interesting.
*/
void
-afs_StuffVcache(register struct VenusFid *afid,
+afs_StuffVcache(struct VenusFid *afid,
struct AFSFetchStatus *OutStatus,
- struct AFSCallBack *CallBack, register struct afs_conn *tc,
+ struct AFSCallBack *CallBack, struct afs_conn *tc,
struct vrequest *areq)
{
- register afs_int32 code, i, newvcache = 0;
- register struct vcache *tvc;
+ afs_int32 code, i, newvcache = 0;
+ struct vcache *tvc;
struct AFSVolSync tsync;
struct volume *tvp;
struct axscache *ac;
* \note Environment: Nothing interesting.
*/
void
-afs_PutVCache(register struct vcache *avc)
+afs_PutVCache(struct vcache *avc)
{
AFS_STATCNT(afs_PutVCache);
#ifdef AFS_DARWIN80_ENV
/*!
* 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
+ * \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);
ReleaseWriteLock(&afs_xcbhash);
/* now find the disk cache entries */
afs_TryToSmush(avc, acred, 1);
- osi_dnlc_purgedp(avc);
+ if (!skipdnlc) {
+ osi_dnlc_purgedp(avc);
+ }
if (avc->linkData && !(avc->f.states & CCore)) {
afs_osi_Free(avc->linkData, strlen(avc->linkData) + 1);
avc->linkData = NULL;
* \param vcache Enter sleep state.
* \param flag Determines what locks to use.
*
- * \return
+ * \return
*/
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 {
}
}
}
+
+/*!
+ * Add a reference on an existing vcache entry.
+ *
+ * \param tvc Pointer to the vcache.
+ *
+ * \note Environment: Must be called with at least one reference from
+ * elsewhere on the vcache, even if that reference will be dropped.
+ * The global lock is required.
+ *
+ * \return 0 on success, -1 on failure.
+ */
+
+int
+afs_RefVCache(struct vcache *tvc)
+{
+#ifdef AFS_DARWIN80_ENV
+ vnode_t tvp;
+#endif
+
+ /* AFS_STATCNT(afs_RefVCache); */
+
+#ifdef AFS_DARWIN80_ENV
+ tvp = AFSTOV(tvc);
+ if (vnode_get(tvp))
+ return -1;
+ if (vnode_ref(tvp)) {
+ AFS_GUNLOCK();
+ /* AFSTOV(tvc) may be NULL */
+ vnode_put(tvp);
+ AFS_GLOCK();
+ return -1;
+ }
+#else
+ osi_vnhold(tvc, 0);
+#endif
+ return 0;
+} /*afs_RefVCache */
+
/*!
* Find a vcache entry given a fid.
*
afs_FindVCache(struct VenusFid *afid, afs_int32 * retry, afs_int32 flag)
{
- register struct vcache *tvc;
+ 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)
afs_int32
afs_NFSFindVCache(struct vcache **avcp, struct VenusFid *afid)
{
- register struct vcache *tvc;
+ struct vcache *tvc;
afs_int32 i;
afs_int32 count = 0;
struct vcache *found_tvc = NULL;
}
#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) {
+#ifndef AFS_DARWIN80_ENV
#if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV)
afs_int32 retry = 0;
osi_vnhold(tvc, &retry);
#else
osi_vnhold(tvc, (int *)0); /* already held, above */
#endif
+#endif
/*
* We obtained the xvcache lock above.
*/
afs_vcacheInit(int astatSize)
{
#if !defined(AFS_LINUX22_ENV)
- register struct vcache *tvp;
+ struct vcache *tvp;
#endif
int i;
if (!afs_maxvcount) {
#if !defined(AFS_LINUX22_ENV)
/* Allocate and thread the struct vcache entries */
- tvp = (struct vcache *)afs_osi_Alloc(astatSize * sizeof(struct vcache));
+ tvp = afs_osi_Alloc(astatSize * sizeof(struct vcache));
+ osi_Assert(tvp != NULL);
memset(tvp, 0, sizeof(struct vcache) * astatSize);
Initial_freeVCList = tvp;
*/
{
- register struct afs_q *tq, *uq = NULL;
- register struct vcache *tvc;
+ struct afs_q *tq, *uq = NULL;
+ struct vcache *tvc;
for (tq = VLRU.prev; tq != &VLRU; tq = uq) {
tvc = QTOV(tq);
uq = QPrev(tq);
int i;
struct vcache *tvc;
int nq=0;
-
+
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);
}
/*!
*
* Clear the Statd flag from all vcaches
*
- * This function removes the Statd flag from all vcaches. It's used by
+ * This function removes the Statd flag from all vcaches. It's used by
* disconnected mode to tidy up during reconnection
*
*/
{
int i;
struct vcache *tvc;
-
+
ObtainWriteLock(&afs_xvcache, 715);
for (i = 0; i < VCSIZE; i++) {
git://git.openafs.org / openafs.git / blobdiff