/* must be called with cm_scacheLock write-locked! */
void cm_AdjustScacheLRU(cm_scache_t *scp)
{
- if (scp == cm_data.scacheLRULastp)
- cm_data.scacheLRULastp = (cm_scache_t *) osi_QPrev(&scp->q);
+ lock_AssertWrite(&cm_scacheLock);
osi_QRemoveHT((osi_queue_t **) &cm_data.scacheLRUFirstp, (osi_queue_t **) &cm_data.scacheLRULastp, &scp->q);
- osi_QAdd((osi_queue_t **) &cm_data.scacheLRUFirstp, &scp->q);
- if (!cm_data.scacheLRULastp)
- cm_data.scacheLRULastp = scp;
+ osi_QAddH((osi_queue_t **) &cm_data.scacheLRUFirstp, (osi_queue_t **) &cm_data.scacheLRULastp, &scp->q);
}
-/* call with scache write-locked and mutex held */
+/* call with cm_scacheLock write-locked and scp rw held */
void cm_RemoveSCacheFromHashTable(cm_scache_t *scp)
{
cm_scache_t **lscpp;
cm_scache_t *tscp;
int i;
+ lock_AssertWrite(&cm_scacheLock);
+ lock_AssertWrite(&scp->rw);
if (scp->flags & CM_SCACHEFLAG_INHASH) {
/* hash it out first */
i = CM_SCACHE_HASH(&scp->fid);
lscpp = &tscp->nextp, tscp = tscp->nextp) {
if (tscp == scp) {
*lscpp = scp->nextp;
+ scp->nextp = NULL;
scp->flags &= ~CM_SCACHEFLAG_INHASH;
break;
}
return -1;
}
+ lock_ObtainWrite(&scp->rw);
cm_RemoveSCacheFromHashTable(scp);
+ lock_ReleaseWrite(&scp->rw);
#if 0
if (flags & CM_SCACHE_RECYCLEFLAG_DESTROY_BUFFERS) {
| CM_SCACHEFLAG_EACCESS);
scp->serverModTime = 0;
scp->dataVersion = 0;
+ scp->bufDataVersionLow = 0;
scp->bulkStatProgress = hzero;
scp->waitCount = 0;
scp->waitQueueT = NULL;
scp->fid.volume = 0;
scp->fid.unique = 0;
scp->fid.cell = 0;
+ scp->fid.hash = 0;
/* remove from dnlc */
cm_dnlcPurgedp(scp);
* tried to store this to server but failed */
scp->mask = 0;
- /* drop held volume ref */
- if (scp->volp) {
- cm_PutVolume(scp->volp);
- scp->volp = NULL;
- }
-
/* discard symlink info */
scp->mountPointStringp[0] = '\0';
memset(&scp->mountRootFid, 0, sizeof(cm_fid_t));
cm_scache_t *scp;
int retry = 0;
+ lock_AssertWrite(&cm_scacheLock);
#if 0
/* first pass - look for deleted objects */
for ( scp = cm_data.scacheLRULastp;
"invalid cm_scache_t address");
memset(scp, 0, sizeof(cm_scache_t));
scp->magic = CM_SCACHE_MAGIC;
- lock_InitializeMutex(&scp->mx, "cm_scache_t mutex");
+ lock_InitializeRWLock(&scp->rw, "cm_scache_t rw");
lock_InitializeRWLock(&scp->bufCreateLock, "cm_scache_t bufCreateLock");
#ifdef USE_BPLUS
lock_InitializeRWLock(&scp->dirlock, "cm_scache_t dirlock");
return scp;
}
+void cm_SetFid(cm_fid_t *fidp, afs_uint32 cell, afs_uint32 volume, afs_uint32 vnode, afs_uint32 unique)
+{
+ fidp->cell = cell;
+ fidp->volume = volume;
+ fidp->vnode = vnode;
+ fidp->unique = unique;
+ fidp->hash = ((cell & 0xF) << 28) | ((volume & 0x3F) << 22) | ((vnode & 0x7FF) << 11) | (unique & 0x7FF);
+}
+
/* like strcmp, only for fids */
-int cm_FidCmp(cm_fid_t *ap, cm_fid_t *bp)
+__inline int cm_FidCmp(cm_fid_t *ap, cm_fid_t *bp)
{
- if (ap->vnode != bp->vnode)
+ if (ap->hash != bp->hash)
+ return 1;
+ if (ap->vnode != bp->vnode)
return 1;
if (ap->volume != bp->volume)
return 1;
cm_data.fakeSCache.linkCount = 1;
cm_data.fakeSCache.refCount = 1;
}
- lock_InitializeMutex(&cm_data.fakeSCache.mx, "cm_scache_t mutex");
+ lock_InitializeRWLock(&cm_data.fakeSCache.rw, "cm_scache_t rw");
}
long
fprintf(stderr, "cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC\n");
return -3;
}
- if (scp->volp && scp->volp->magic != CM_VOLUME_MAGIC) {
- afsi_log("cm_ValidateSCache failure: scp->volp->magic != CM_VOLUME_MAGIC");
- fprintf(stderr, "cm_ValidateSCache failure: scp->volp->magic != CM_VOLUME_MAGIC\n");
- return -4;
- }
if (i > cm_data.currentSCaches ) {
afsi_log("cm_ValidateSCache failure: LRU First queue loops");
fprintf(stderr, "cm_ValidateSCache failure: LUR First queue loops\n");
fprintf(stderr, "cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC\n");
return -7;
}
- if (scp->volp && scp->volp->magic != CM_VOLUME_MAGIC) {
- afsi_log("cm_ValidateSCache failure: scp->volp->magic != CM_VOLUME_MAGIC");
- fprintf(stderr, "cm_ValidateSCache failure: scp->volp->magic != CM_VOLUME_MAGIC\n");
- return -8;
- }
if (i > cm_data.currentSCaches ) {
afsi_log("cm_ValidateSCache failure: LRU Last queue loops");
fprintf(stderr, "cm_ValidateSCache failure: LUR Last queue loops\n");
for ( i=0; i < cm_data.scacheHashTableSize; i++ ) {
for ( scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp ) {
+ afs_uint32 hash;
+ hash = CM_SCACHE_HASH(&scp->fid);
if (scp->magic != CM_SCACHE_MAGIC) {
afsi_log("cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC");
fprintf(stderr, "cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC\n");
fprintf(stderr, "cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC\n");
return -11;
}
- if (scp->volp && scp->volp->magic != CM_VOLUME_MAGIC) {
- afsi_log("cm_ValidateSCache failure: scp->volp->magic != CM_VOLUME_MAGIC");
- fprintf(stderr, "cm_ValidateSCache failure: scp->volp->magic != CM_VOLUME_MAGIC\n");
- return -12;
+ if (hash != i) {
+ afsi_log("cm_ValidateSCache failure: scp hash != hash index");
+ fprintf(stderr, "cm_ValidateSCache failure: scp hash != hash index\n");
+ return -13;
}
}
}
lock_ObtainWrite(&cm_scacheLock);
for ( scp = cm_data.allSCachesp; scp; scp = scp->allNextp ) {
if (scp->cbServerp) {
- if (scp->flags & CM_SCACHEFLAG_PURERO && scp->volp) {
- if (scp->volp->cbExpiresRO == scp->cbExpires) {
- scp->volp->cbExpiresRO = now+1;
+ if (scp->flags & CM_SCACHEFLAG_PURERO) {
+ cm_volume_t *volp = cm_GetVolumeByFID(&scp->fid);
+ if (volp) {
+ if (volp->cbExpiresRO == scp->cbExpires)
+ volp->cbExpiresRO = now+1;
+ cm_PutVolume(volp);
}
}
scp->cbExpires = now+1;
for ( scp = cm_data.allSCachesp; scp;
scp = scp->allNextp ) {
if (scp->randomACLp) {
- lock_ObtainMutex(&scp->mx);
+ lock_ObtainWrite(&scp->rw);
cm_FreeAllACLEnts(scp);
- lock_ReleaseMutex(&scp->mx);
+ lock_ReleaseWrite(&scp->rw);
}
if (scp->cbServerp) {
scp->dirDataVersion = -1;
lock_FinalizeRWLock(&scp->dirlock);
#endif
- lock_FinalizeMutex(&scp->mx);
+ lock_FinalizeRWLock(&scp->rw);
lock_FinalizeRWLock(&scp->bufCreateLock);
}
lock_ReleaseWrite(&cm_scacheLock);
for ( scp = cm_data.allSCachesp; scp;
scp = scp->allNextp ) {
- lock_InitializeMutex(&scp->mx, "cm_scache_t mutex");
+ lock_InitializeRWLock(&scp->rw, "cm_scache_t rw");
lock_InitializeRWLock(&scp->bufCreateLock, "cm_scache_t bufCreateLock");
#ifdef USE_BPLUS
lock_InitializeRWLock(&scp->dirlock, "cm_scache_t dirlock");
return NULL;
}
- lock_ObtainWrite(&cm_scacheLock);
+ lock_ObtainRead(&cm_scacheLock);
for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
if (cm_FidCmp(fidp, &scp->fid) == 0) {
cm_HoldSCacheNoLock(scp);
+ lock_ConvertRToW(&cm_scacheLock);
cm_AdjustScacheLRU(scp);
lock_ReleaseWrite(&cm_scacheLock);
return scp;
}
}
- lock_ReleaseWrite(&cm_scacheLock);
+ lock_ReleaseRead(&cm_scacheLock);
return NULL;
}
#endif
{
long hash;
- cm_scache_t *scp;
+ cm_scache_t *scp = NULL;
long code;
cm_volume_t *volp = NULL;
cm_cell_t *cellp;
- char* mp = NULL;
- int special; // yj: boolean variable to test if file is on root.afs
- int isRoot;
+ int special = 0; // yj: boolean variable to test if file is on root.afs
+ int isRoot = 0;
extern cm_fid_t cm_rootFid;
hash = CM_SCACHE_HASH(fidp);
osi_assertx(fidp->cell != 0, "unassigned cell value");
- if (fidp->cell== cm_data.rootFid.cell &&
- fidp->volume==cm_data.rootFid.volume &&
- fidp->vnode==0x0 && fidp->unique==0x0)
- {
- osi_Log0(afsd_logp,"cm_GetSCache called with root cell/volume and vnode=0 and unique=0");
- }
+#ifdef AFS_FREELANCE_CLIENT
+ special = (fidp->cell==AFS_FAKE_ROOT_CELL_ID &&
+ fidp->volume==AFS_FAKE_ROOT_VOL_ID &&
+ !(fidp->vnode==0x1 && fidp->unique==0x1));
+ isRoot = (fidp->cell==AFS_FAKE_ROOT_CELL_ID &&
+ fidp->volume==AFS_FAKE_ROOT_VOL_ID &&
+ fidp->vnode==0x1 && fidp->unique==0x1);
+#endif
// yj: check if we have the scp, if so, we don't need
// to do anything else
afsi_log("%s:%d cm_GetSCache (1) outScpp 0x%p ref %d", file, line, scp, scp->refCount);
osi_Log1(afsd_logp,"cm_GetSCache (1) outScpp 0x%p", scp);
#endif
+#ifdef AFS_FREELANCE_CLIENT
+ if (cm_freelanceEnabled && special &&
+ cm_data.fakeDirVersion != scp->dataVersion)
+ break;
+#endif
cm_HoldSCacheNoLock(scp);
*outScpp = scp;
cm_AdjustScacheLRU(scp);
// because we have to fill in the status stuff 'coz we
// don't want trybulkstat to fill it in for us
#ifdef AFS_FREELANCE_CLIENT
- special = (fidp->cell==AFS_FAKE_ROOT_CELL_ID &&
- fidp->volume==AFS_FAKE_ROOT_VOL_ID &&
- !(fidp->vnode==0x1 && fidp->unique==0x1));
- isRoot = (fidp->cell==AFS_FAKE_ROOT_CELL_ID &&
- fidp->volume==AFS_FAKE_ROOT_VOL_ID &&
- fidp->vnode==0x1 && fidp->unique==0x1);
if (cm_freelanceEnabled && isRoot) {
osi_Log0(afsd_logp,"cm_GetSCache Freelance and isRoot");
/* freelance: if we are trying to get the root scp for the first
}
if (cm_freelanceEnabled && special) {
+ char mp[MOUNTPOINTLEN] = "";
+ afs_uint32 fileType;
+
+ lock_ReleaseWrite(&cm_scacheLock);
osi_Log0(afsd_logp,"cm_GetSCache Freelance and special");
- if (fidp->vnode > 1 && fidp->vnode <= cm_noLocalMountPoints + 2) {
- lock_ObtainMutex(&cm_Freelance_Lock);
- mp =(cm_localMountPoints+fidp->vnode-2)->mountPointStringp;
- lock_ReleaseMutex(&cm_Freelance_Lock);
+
+ if (cm_getLocalMountPointChange()) { // check for changes
+ cm_clearLocalMountPointChange(); // clear the changefile
+ cm_reInitLocalMountPoints(); // start reinit
+ }
+
+ lock_ObtainMutex(&cm_Freelance_Lock);
+ if (fidp->vnode >= 2 && fidp->vnode - 2 < cm_noLocalMountPoints) {
+ strncpy(mp,(cm_localMountPoints+fidp->vnode-2)->mountPointStringp, MOUNTPOINTLEN);
+ mp[MOUNTPOINTLEN-1] = '\0';
+ if ( !strnicmp(mp, "msdfs:", strlen("msdfs:")) )
+ fileType = CM_SCACHETYPE_DFSLINK;
+ else
+ fileType = (cm_localMountPoints+fidp->vnode-2)->fileType;
} else {
- mp = "";
+ fileType = CM_SCACHETYPE_INVALID;
+
}
- scp = cm_GetNewSCache();
+ lock_ReleaseMutex(&cm_Freelance_Lock);
+ lock_ObtainWrite(&cm_scacheLock);
+ if (scp == NULL)
+ scp = cm_GetNewSCache();
if (scp == NULL) {
osi_Log0(afsd_logp,"cm_GetSCache unable to obtain *new* scache entry");
lock_ReleaseWrite(&cm_scacheLock);
* assume that no one else is using the one this is returned.
*/
lock_ReleaseWrite(&cm_scacheLock);
- lock_ObtainMutex(&scp->mx);
+ lock_ObtainWrite(&scp->rw);
lock_ObtainWrite(&cm_scacheLock);
#endif
scp->fid = *fidp;
- scp->volp = cm_data.rootSCachep->volp;
- cm_GetVolume(scp->volp); /* grab an additional reference */
scp->dotdotFid.cell=AFS_FAKE_ROOT_CELL_ID;
scp->dotdotFid.volume=AFS_FAKE_ROOT_VOL_ID;
scp->dotdotFid.unique=1;
scp->dotdotFid.vnode=1;
scp->flags |= (CM_SCACHEFLAG_PURERO | CM_SCACHEFLAG_RO);
- scp->nextp=cm_data.scacheHashTablep[hash];
- cm_data.scacheHashTablep[hash]=scp;
- scp->flags |= CM_SCACHEFLAG_INHASH;
+ if (!(scp->flags & CM_SCACHEFLAG_INHASH)) {
+ scp->nextp = cm_data.scacheHashTablep[hash];
+ cm_data.scacheHashTablep[hash] = scp;
+ scp->flags |= CM_SCACHEFLAG_INHASH;
+ }
scp->refCount = 1;
osi_Log1(afsd_logp,"cm_GetSCache (freelance) sets refCount to 1 scp 0x%x", scp);
- if (fidp->vnode > 1 && fidp->vnode <= cm_noLocalMountPoints + 2)
- scp->fileType = (cm_localMountPoints+fidp->vnode-2)->fileType;
- else
- scp->fileType = CM_SCACHETYPE_INVALID;
-
- lock_ObtainMutex(&cm_Freelance_Lock);
+ scp->fileType = fileType;
scp->length.LowPart = (DWORD)strlen(mp)+4;
scp->length.HighPart = 0;
strncpy(scp->mountPointStringp,mp,MOUNTPOINTLEN);
- scp->mountPointStringp[MOUNTPOINTLEN-1] = '\0';
- lock_ReleaseMutex(&cm_Freelance_Lock);
-
scp->owner=0x0;
scp->unixModeBits=0777;
scp->clientModTime=FakeFreelanceModTime;
scp->parentVnode=0x1;
scp->group=0;
scp->dataVersion=cm_data.fakeDirVersion;
+ scp->bufDataVersionLow=cm_data.fakeDirVersion;
scp->lockDataVersion=-1; /* no lock yet */
#if not_too_dangerous
- lock_ReleaseMutex(&scp->mx);
+ lock_ReleaseWrite(&scp->rw);
#endif
*outScpp = scp;
lock_ReleaseWrite(&cm_scacheLock);
/* otherwise, we need to find the volume */
if (!cm_freelanceEnabled || !isRoot) {
lock_ReleaseWrite(&cm_scacheLock); /* for perf. reasons */
- cellp = cm_FindCellByID(fidp->cell);
+ cellp = cm_FindCellByID(fidp->cell, 0);
if (!cellp)
return CM_ERROR_NOSUCHCELL;
- code = cm_GetVolumeByID(cellp, fidp->volume, userp, reqp, CM_GETVOL_FLAG_CREATE, &volp);
+ code = cm_FindVolumeByID(cellp, fidp->volume, userp, reqp, CM_GETVOL_FLAG_CREATE, &volp);
if (code)
return code;
lock_ObtainWrite(&cm_scacheLock);
osi_Log1(afsd_logp,"cm_GetSCache (3) outScpp 0x%p", scp);
#endif
cm_HoldSCacheNoLock(scp);
- osi_assertx(scp->volp == volp, "cm_scache_t volume has unexpected value");
cm_AdjustScacheLRU(scp);
lock_ReleaseWrite(&cm_scacheLock);
if (volp)
* assume that no one else is using the one this is returned.
*/
lock_ReleaseWrite(&cm_scacheLock);
- lock_ObtainMutex(&scp->mx);
+ lock_ObtainWrite(&scp->rw);
lock_ObtainWrite(&cm_scacheLock);
#endif
scp->fid = *fidp;
- scp->volp = volp; /* a held reference */
-
if (!cm_freelanceEnabled || !isRoot) {
/* if this scache entry represents a volume root then we need
* to copy the dotdotFipd from the volume structure where the
* "master" copy is stored (defect 11489)
*/
- if (scp->fid.vnode == 1 && scp->fid.unique == 1) {
- scp->dotdotFid = volp->dotdotFid;
- }
-
- if (volp->ro.ID == fidp->volume)
+ if (volp->vol[ROVOL].ID == fidp->volume) {
scp->flags |= (CM_SCACHEFLAG_PURERO | CM_SCACHEFLAG_RO);
- else if (volp->bk.ID == fidp->volume)
+ if (scp->fid.vnode == 1 && scp->fid.unique == 1)
+ scp->dotdotFid = cm_VolumeStateByType(volp, ROVOL)->dotdotFid;
+ } else if (volp->vol[BACKVOL].ID == fidp->volume) {
scp->flags |= CM_SCACHEFLAG_RO;
+ if (scp->fid.vnode == 1 && scp->fid.unique == 1)
+ scp->dotdotFid = cm_VolumeStateByType(volp, BACKVOL)->dotdotFid;
+ } else {
+ if (scp->fid.vnode == 1 && scp->fid.unique == 1)
+ scp->dotdotFid = cm_VolumeStateByType(volp, RWVOL)->dotdotFid;
+ }
}
+ if (volp)
+ cm_PutVolume(volp);
scp->nextp = cm_data.scacheHashTablep[hash];
cm_data.scacheHashTablep[hash] = scp;
scp->flags |= CM_SCACHEFLAG_INHASH;
scp->refCount = 1;
osi_Log1(afsd_logp,"cm_GetSCache sets refCount to 1 scp 0x%x", scp);
#if not_too_dangerous
- lock_ReleaseMutex(&scp->mx);
+ lock_ReleaseWrite(&scp->rw);
#endif
/* XXX - The following fields in the cm_scache are
cm_fid_t parent_fid;
cm_scache_t * pscp = NULL;
- lock_ObtainRead(&cm_scacheLock);
- parent_fid = scp->fid;
- parent_fid.vnode = scp->parentVnode;
- parent_fid.unique = scp->parentUnique;
+ lock_ObtainWrite(&cm_scacheLock);
+ cm_SetFid(&parent_fid, scp->fid.cell, scp->fid.volume, scp->parentVnode, scp->parentUnique);
if (cm_FidCmp(&scp->fid, &parent_fid)) {
i = CM_SCACHE_HASH(&parent_fid);
}
}
- lock_ReleaseRead(&cm_scacheLock);
+ lock_ReleaseWrite(&cm_scacheLock);
return pscp;
}
afs_uint32 sleep_buf_cmflags = 0;
afs_uint32 sleep_scp_bufs = 0;
int wakeupCycle;
+ int getAccessRights = 1;
+
+ lock_AssertWrite(&scp->rw);
/* lookup this first */
bufLocked = flags & CM_SCACHESYNC_BUFLOCKED;
lock_ReleaseMutex(&bufp->mx);
code = cm_GetCallback(scp, userp, reqp, (flags & CM_SCACHESYNC_FORCECB)?1:0);
if (bufLocked) {
- lock_ReleaseMutex(&scp->mx);
+ lock_ReleaseWrite(&scp->rw);
lock_ObtainMutex(&bufp->mx);
- lock_ObtainMutex(&scp->mx);
+ lock_ObtainWrite(&scp->rw);
}
if (code)
return code;
/* can't check access rights without a callback */
osi_assertx(flags & CM_SCACHESYNC_NEEDCALLBACK, "!CM_SCACHESYNC_NEEDCALLBACK");
- if ((rights & PRSFS_WRITE) && (scp->flags & CM_SCACHEFLAG_RO))
+ if ((rights & (PRSFS_WRITE|PRSFS_DELETE)) && (scp->flags & CM_SCACHEFLAG_RO))
return CM_ERROR_READONLY;
- if (cm_HaveAccessRights(scp, userp, rights, &outRights)) {
+ if (cm_HaveAccessRights(scp, userp, rights, &outRights) || !getAccessRights) {
if (~outRights & rights)
return CM_ERROR_NOACCESS;
}
if (bufLocked) lock_ReleaseMutex(&bufp->mx);
code = cm_GetAccessRights(scp, userp, reqp);
if (bufLocked) {
- lock_ReleaseMutex(&scp->mx);
+ lock_ReleaseWrite(&scp->rw);
lock_ObtainMutex(&bufp->mx);
- lock_ObtainMutex(&scp->mx);
+ lock_ObtainWrite(&scp->rw);
}
if (code)
return code;
+ getAccessRights = 0; /* do not repeat */
continue;
}
}
scp->waitCount = scp->waitRequests = 1;
}
- if (bufLocked)
- lock_ReleaseMutex(&bufp->mx);
-
cm_SyncOpAddToWaitQueue(scp, flags, bufp);
wakeupCycle = 0;
do {
- if (wakeupCycle++ != 0)
- lock_ObtainMutex(&scp->mx);
- osi_SleepM((LONG_PTR) &scp->flags, &scp->mx);
+ if (bufLocked)
+ lock_ReleaseMutex(&bufp->mx);
+ osi_SleepW((LONG_PTR) &scp->flags, &scp->rw);
+ if (bufLocked)
+ lock_ObtainMutex(&bufp->mx);
+ lock_ObtainWrite(&scp->rw);
} while (!cm_SyncOpCheckContinue(scp, flags, bufp));
smb_UpdateServerPriority();
- if (bufLocked)
- lock_ObtainMutex(&bufp->mx);
- lock_ObtainMutex(&scp->mx);
scp->waitCount--;
osi_Log3(afsd_logp, "CM SyncOp woke! scp 0x%p; still waiting %d threads of %d requests",
scp, scp->waitCount, scp->waitRequests);
osi_queueData_t *qdp;
cm_buf_t *tbufp;
- lock_AssertMutex(&scp->mx);
+ lock_AssertWrite(&scp->rw);
/* now, update the recorded state for RPC-type calls */
if (flags & CM_SCACHESYNC_FETCHSTATUS)
statusp->Group = 0;
statusp->SyncCounter = 0;
statusp->dataVersionHigh = (afs_uint32)(cm_data.fakeDirVersion >> 32);
- statusp->errorCode = 0;
+ statusp->errorCode = 0;
}
#endif /* AFS_FREELANCE_CLIENT */
scp->unixModeBits = 0;
scp->anyAccess = 0;
scp->dataVersion = 0;
+ scp->bufDataVersionLow = 0;
if (dscp) {
scp->parentVnode = dscp->fid.vnode;
if (!(flags & CM_MERGEFLAG_FORCE) && dataVersion < scp->dataVersion) {
struct cm_cell *cellp;
- cellp = cm_FindCellByID(scp->fid.cell);
+ cellp = cm_FindCellByID(scp->fid.cell, 0);
if (scp->cbServerp) {
struct cm_volume *volp = NULL;
- cm_GetVolumeByID(cellp, scp->fid.volume, userp,
+ cm_FindVolumeByID(cellp, scp->fid.volume, userp,
(cm_req_t *) NULL, CM_GETVOL_FLAG_CREATE, &volp);
osi_Log2(afsd_logp, "old data from server %x volume %s",
scp->cbServerp->addr.sin_addr.s_addr,
if (volp)
cm_PutVolume(volp);
}
- osi_Log3(afsd_logp, "Bad merge, scp %x, scp dv %I64d, RPC dv %I64d",
+ osi_Log3(afsd_logp, "Bad merge, scp %x, scp dv %d, RPC dv %d",
scp, scp->dataVersion, dataVersion);
/* we have a number of data fetch/store operations running
* concurrently, and we can tell which one executed last at the
cm_AddACLCache(scp, userp, statusp->CallerAccess);
}
- if ((flags & CM_MERGEFLAG_STOREDATA) && dataVersion - scp->dataVersion == 1) {
- buf_ForceDataVersion(scp, scp->dataVersion, dataVersion);
- } else if (scp->dataVersion != 0 &&
- (!(flags & CM_MERGEFLAG_DIROP) && dataVersion != scp->dataVersion ||
- (flags & CM_MERGEFLAG_DIROP) && dataVersion - scp->dataVersion > 1)) {
+ if (scp->dataVersion != 0 &&
+ (!(flags & (CM_MERGEFLAG_DIROP|CM_MERGEFLAG_STOREDATA)) && dataVersion != scp->dataVersion ||
+ (flags & (CM_MERGEFLAG_DIROP|CM_MERGEFLAG_STOREDATA)) && dataVersion - scp->dataVersion > 1)) {
/*
* We now know that all of the data buffers that we have associated
* with this scp are invalid. Subsequent operations will go faster
*
* We do not remove directory buffers if the dataVersion delta is 1 because
* those version numbers will be updated as part of the directory operation.
+ *
+ * We do not remove storedata buffers because they will still be valid.
*/
int i, j;
cm_buf_t **lbpp;
for (bp = cm_data.buf_fileHashTablepp[i]; bp; bp=nextBp)
{
nextBp = bp->fileHashp;
+ /*
+ * if the buffer belongs to this stat cache entry
+ * and the buffer mutex can be obtained, check the
+ * reference count and if it is zero, remove the buffer
+ * from the hash tables. If there are references,
+ * the buffer might be updated to the current version
+ * so leave it in place.
+ */
+ if (cm_FidCmp(&scp->fid, &bp->fid) == 0 &&
+ lock_TryMutex(&bp->mx)) {
+ if (bp->refCount == 0 &&
+ !(bp->flags & CM_BUF_READING | CM_BUF_WRITING | CM_BUF_DIRTY)) {
+ prevBp = bp->fileHashBackp;
+ bp->fileHashBackp = bp->fileHashp = NULL;
+ if (prevBp)
+ prevBp->fileHashp = nextBp;
+ else
+ cm_data.buf_fileHashTablepp[i] = nextBp;
+ if (nextBp)
+ nextBp->fileHashBackp = prevBp;
+
+ j = BUF_HASH(&bp->fid, &bp->offset);
+ lbpp = &(cm_data.buf_scacheHashTablepp[j]);
+ for(tbp = *lbpp; tbp; lbpp = &tbp->hashp, tbp = *lbpp) {
+ if (tbp == bp)
+ break;
+ }
- if (cm_FidCmp(&scp->fid, &bp->fid) == 0) {
- prevBp = bp->fileHashBackp;
- bp->fileHashBackp = bp->fileHashp = NULL;
- if (prevBp)
- prevBp->fileHashp = nextBp;
- else
- cm_data.buf_fileHashTablepp[i] = nextBp;
- if (nextBp)
- nextBp->fileHashBackp = prevBp;
-
- j = BUF_HASH(&bp->fid, &bp->offset);
- lbpp = &(cm_data.buf_scacheHashTablepp[j]);
- for(tbp = *lbpp; tbp; lbpp = &tbp->hashp, tbp = *lbpp) {
- if (tbp == bp)
- break;
- }
-
- *lbpp = bp->hashp; /* hash out */
- bp->hashp = NULL;
+ *lbpp = bp->hashp; /* hash out */
+ bp->hashp = NULL;
- bp->flags &= ~CM_BUF_INHASH;
+ bp->flags &= ~CM_BUF_INHASH;
+ }
+ lock_ReleaseMutex(&bp->mx);
}
}
-
lock_ReleaseWrite(&buf_globalLock);
}
+
+ /* We maintain a range of buffer dataVersion values which are considered
+ * valid. This avoids the need to update the dataVersion on each buffer
+ * object during an uncontested storeData operation. As a result this
+ * merge status no longer has performance characteristics derived from
+ * the size of the file.
+ */
+ if (((flags & CM_MERGEFLAG_STOREDATA) && dataVersion - scp->dataVersion > 1) ||
+ (!(flags & CM_MERGEFLAG_STOREDATA) && scp->dataVersion != dataVersion) ||
+ scp->bufDataVersionLow == 0)
+ scp->bufDataVersionLow = dataVersion;
+
scp->dataVersion = dataVersion;
+
+ /*
+ * If someone is waiting for status information, we can wake them up
+ * now even though the entity that issued the FetchStatus may not
+ * have completed yet.
+ */
+ cm_SyncOpDone(scp, NULL, CM_SCACHESYNC_FETCHSTATUS);
}
/* note that our stat cache info is incorrect, so force us eventually
*/
void cm_DiscardSCache(cm_scache_t *scp)
{
- lock_AssertMutex(&scp->mx);
+ lock_AssertWrite(&scp->rw);
if (scp->cbServerp) {
cm_PutServer(scp->cbServerp);
scp->cbServerp = NULL;
cm_dnlcPurgevp(scp);
cm_FreeAllACLEnts(scp);
+ if (scp->fileType == CM_SCACHETYPE_DFSLINK)
+ cm_VolStatus_Invalidate_DFS_Mapping(scp);
+
/* Force mount points and symlinks to be re-evaluated */
scp->mountPointStringp[0] = '\0';
}
#else
void cm_HoldSCacheNoLock(cm_scache_t *scp)
#endif
-{
+{
+ afs_int32 refCount;
+
osi_assertx(scp != NULL, "null cm_scache_t");
- scp->refCount++;
+ lock_AssertAny(&cm_scacheLock);
+ refCount = InterlockedIncrement(&scp->refCount);
#ifdef DEBUG_REFCOUNT
- osi_Log2(afsd_logp,"cm_HoldSCacheNoLock scp 0x%p ref %d",scp, scp->refCount);
- afsi_log("%s:%d cm_HoldSCacheNoLock scp 0x%p, ref %d", file, line, scp, scp->refCount);
+ osi_Log2(afsd_logp,"cm_HoldSCacheNoLock scp 0x%p ref %d",scp, refCount);
+ afsi_log("%s:%d cm_HoldSCacheNoLock scp 0x%p, ref %d", file, line, scp, refCount);
#endif
}
void cm_HoldSCache(cm_scache_t *scp)
#endif
{
+ afs_int32 refCount;
+
osi_assertx(scp != NULL, "null cm_scache_t");
- lock_ObtainWrite(&cm_scacheLock);
- scp->refCount++;
+ lock_ObtainRead(&cm_scacheLock);
+ refCount = InterlockedIncrement(&scp->refCount);
#ifdef DEBUG_REFCOUNT
- osi_Log2(afsd_logp,"cm_HoldSCache scp 0x%p ref %d",scp, scp->refCount);
- afsi_log("%s:%d cm_HoldSCache scp 0x%p ref %d", file, line, scp, scp->refCount);
+ osi_Log2(afsd_logp,"cm_HoldSCache scp 0x%p ref %d",scp, refCount);
+ afsi_log("%s:%d cm_HoldSCache scp 0x%p ref %d", file, line, scp, refCount);
#endif
- lock_ReleaseWrite(&cm_scacheLock);
+ lock_ReleaseRead(&cm_scacheLock);
}
#ifdef DEBUG_REFCOUNT
void cm_ReleaseSCacheNoLock(cm_scache_t *scp)
#endif
{
+ afs_int32 refCount;
+ long lockstate;
+
osi_assertx(scp != NULL, "null cm_scache_t");
- if (scp->refCount == 0)
+ lock_AssertAny(&cm_scacheLock);
+
+ lockstate = lock_GetRWLockState(&cm_scacheLock);
+ refCount = InterlockedDecrement(&scp->refCount);
+#ifdef DEBUG_REFCOUNT
+ if (refCount < 0)
osi_Log1(afsd_logp,"cm_ReleaseSCacheNoLock about to panic scp 0x%x",scp);
- osi_assertx(scp->refCount-- >= 0, "cm_scache_t refCount 0");
+#endif
+ osi_assertx(refCount >= 0, "cm_scache_t refCount 0");
#ifdef DEBUG_REFCOUNT
- osi_Log2(afsd_logp,"cm_ReleaseSCacheNoLock scp 0x%p ref %d",scp,scp->refCount);
- afsi_log("%s:%d cm_ReleaseSCacheNoLock scp 0x%p ref %d", file, line, scp, scp->refCount);
+ osi_Log2(afsd_logp,"cm_ReleaseSCacheNoLock scp 0x%p ref %d",scp, refCount);
+ afsi_log("%s:%d cm_ReleaseSCacheNoLock scp 0x%p ref %d", file, line, scp, refCount);
#endif
+
+ if (refCount == 0 && (scp->flags & CM_SCACHEFLAG_DELETED)) {
+ int deleted = 0;
+ if (lockstate != OSI_RWLOCK_WRITEHELD)
+ lock_ConvertRToW(&cm_scacheLock);
+ lock_ObtainWrite(&scp->rw);
+ if (scp->flags & CM_SCACHEFLAG_DELETED)
+ deleted = 1;
+ lock_ReleaseWrite(&scp->rw);
+ if (refCount == 0 && deleted)
+ cm_RecycleSCache(scp, 0);
+ if (lockstate != OSI_RWLOCK_WRITEHELD)
+ lock_ConvertWToR(&cm_scacheLock);
+ }
}
#ifdef DEBUG_REFCOUNT
#else
void cm_ReleaseSCache(cm_scache_t *scp)
#endif
-{
+{
+ afs_int32 refCount;
+
osi_assertx(scp != NULL, "null cm_scache_t");
- lock_ObtainWrite(&cm_scacheLock);
- if (scp->refCount == 0)
+ lock_ObtainRead(&cm_scacheLock);
+ refCount = InterlockedDecrement(&scp->refCount);
+#ifdef DEBUG_REFCOUNT
+ if (refCount < 0)
osi_Log1(afsd_logp,"cm_ReleaseSCache about to panic scp 0x%x",scp);
- osi_assertx(scp->refCount != 0, "cm_scache_t refCount 0");
- scp->refCount--;
+#endif
+ osi_assertx(refCount >= 0, "cm_scache_t refCount 0");
#ifdef DEBUG_REFCOUNT
- osi_Log2(afsd_logp,"cm_ReleaseSCache scp 0x%p ref %d",scp,scp->refCount);
- afsi_log("%s:%d cm_ReleaseSCache scp 0x%p ref %d", file, line, scp, scp->refCount);
+ osi_Log2(afsd_logp,"cm_ReleaseSCache scp 0x%p ref %d",scp, refCount);
+ afsi_log("%s:%d cm_ReleaseSCache scp 0x%p ref %d", file, line, scp, refCount);
#endif
- lock_ReleaseWrite(&cm_scacheLock);
+
+ if (scp->flags & CM_SCACHEFLAG_DELETED) {
+ int deleted = 0;
+ lock_ObtainWrite(&scp->rw);
+ if (scp->flags & CM_SCACHEFLAG_DELETED)
+ deleted = 1;
+ lock_ReleaseWrite(&scp->rw);
+ if (deleted) {
+ lock_ConvertRToW(&cm_scacheLock);
+ cm_RecycleSCache(scp, 0);
+ lock_ConvertWToR(&cm_scacheLock);
+ }
+ }
+
+ lock_ReleaseRead(&cm_scacheLock);
}
/* just look for the scp entry to get filetype */
for (scp = cm_data.allSCachesp; scp; scp = scp->allNextp)
{
- sprintf(output, "%s scp=0x%p, fid (cell=%d, volume=%d, vnode=%d, unique=%d) volp=0x%p type=%d dv=%I64d len=0x%I64x mp='%s' flags=0x%x cb=0x%x refCount=%u\r\n",
+ sprintf(output, "%s scp=0x%p, fid (cell=%d, volume=%d, vnode=%d, unique=%d) type=%d dv=%I64d len=0x%I64x mp='%s' flags=0x%x cb=0x%x refCount=%u\r\n",
cookie, scp, scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique,
- scp->volp, scp->fileType, scp->dataVersion, scp->length.QuadPart, scp->mountPointStringp, scp->flags,
+ scp->fileType, scp->dataVersion, scp->length.QuadPart, scp->mountPointStringp, scp->flags,
(unsigned long)scp->cbExpires, scp->refCount);
WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
}
git://git.openafs.org / openafs.git / blobdiff