#include <afs/param.h>
#include <afs/stds.h>
-#ifndef DJGPP
#include <windows.h>
#include <winsock2.h>
#include <nb30.h>
-#endif /* !DJGPP */
#include <malloc.h>
#include <string.h>
#include <stdlib.h>
#include <osi.h>
#include "afsd.h"
+#include "cm_btree.h"
/*extern void afsi_log(char *pattern, ...);*/
/* Dummy scache entry for use with pioctl fids */
cm_scache_t cm_fakeSCache;
+osi_queue_t * cm_allFreeWaiters; /* protected by cm_scacheLock */
+
#ifdef AFS_FREELANCE_CLIENT
extern osi_mutex_t cm_Freelance_Lock;
#endif
/* must be called with cm_scacheLock write-locked! */
-void cm_AdjustLRU(cm_scache_t *scp)
+void cm_AdjustScacheLRU(cm_scache_t *scp)
{
if (scp == cm_data.scacheLRULastp)
cm_data.scacheLRULastp = (cm_scache_t *) osi_QPrev(&scp->q);
cm_data.scacheLRULastp = scp;
}
-/* called with cm_scacheLock write-locked; recycles an existing scp. */
-long cm_RecycleSCache(cm_scache_t *scp, afs_int32 flags)
+/* call with scache write-locked and mutex held */
+void cm_RemoveSCacheFromHashTable(cm_scache_t *scp)
{
cm_scache_t **lscpp;
cm_scache_t *tscp;
int i;
-
+
if (scp->flags & CM_SCACHEFLAG_INHASH) {
/* hash it out first */
i = CM_SCACHE_HASH(&scp->fid);
- for (lscpp = &cm_data.hashTablep[i], tscp = cm_data.hashTablep[i];
- tscp;
- lscpp = &tscp->nextp, tscp = tscp->nextp) {
+ for (lscpp = &cm_data.scacheHashTablep[i], tscp = cm_data.scacheHashTablep[i];
+ tscp;
+ lscpp = &tscp->nextp, tscp = tscp->nextp) {
if (tscp == scp) {
*lscpp = scp->nextp;
scp->flags &= ~CM_SCACHEFLAG_INHASH;
break;
}
}
- osi_assertx(tscp, "afsd: scache hash screwup");
}
+}
+
+/* called with cm_scacheLock write-locked; recycles an existing scp.
+ *
+ * this function ignores all of the locking hierarchy.
+ */
+long cm_RecycleSCache(cm_scache_t *scp, afs_int32 flags)
+{
+ if (scp->refCount != 0) {
+ return -1;
+ }
+
+ if (scp->flags & CM_SCACHEFLAG_SMB_FID) {
+ osi_Log1(afsd_logp,"cm_RecycleSCache CM_SCACHEFLAG_SMB_FID detected scp 0x%p", scp);
+#ifdef DEBUG
+ osi_panic("cm_RecycleSCache CM_SCACHEFLAG_SMB_FID detected",__FILE__,__LINE__);
+#endif
+ return -1;
+ }
+
+ cm_RemoveSCacheFromHashTable(scp);
+#if 0
if (flags & CM_SCACHE_RECYCLEFLAG_DESTROY_BUFFERS) {
osi_queueData_t *qdp;
cm_buf_t *bufp;
lock_ObtainMutex(&bufp->mx);
bufp->cmFlags &= ~CM_BUF_CMSTORING;
bufp->flags &= ~CM_BUF_DIRTY;
+ bufp->dirty_offset = 0;
+ bufp->dirty_length = 0;
+ bufp->flags |= CM_BUF_ERROR;
+ bufp->error = VNOVNODE;
bufp->dataVersion = -1; /* bad */
bufp->dirtyCounter++;
if (bufp->flags & CM_BUF_WAITING) {
lock_ObtainMutex(&bufp->mx);
bufp->cmFlags &= ~CM_BUF_CMFETCHING;
bufp->flags &= ~CM_BUF_DIRTY;
+ bufp->dirty_offset = 0;
+ bufp->dirty_length = 0;
+ bufp->flags |= CM_BUF_ERROR;
+ bufp->error = VNOVNODE;
bufp->dataVersion = -1; /* bad */
bufp->dirtyCounter++;
if (bufp->flags & CM_BUF_WAITING) {
buf_Release(bufp);
}
}
+ buf_CleanDirtyBuffers(scp);
} else {
/* look for things that shouldn't still be set */
- osi_assert(scp->bufWritesp == NULL);
- osi_assert(scp->bufReadsp == NULL);
+ osi_assertx(scp->bufWritesp == NULL, "non-null cm_scache_t bufWritesp");
+ osi_assertx(scp->bufReadsp == NULL, "non-null cm_scache_t bufReadsp");
}
+#endif
/* invalidate so next merge works fine;
* also initialize some flags */
+ scp->fileType = 0;
scp->flags &= ~(CM_SCACHEFLAG_STATD
+ | CM_SCACHEFLAG_DELETED
| CM_SCACHEFLAG_RO
| CM_SCACHEFLAG_PURERO
| CM_SCACHEFLAG_OVERQUOTA
- | CM_SCACHEFLAG_OUTOFSPACE);
+ | CM_SCACHEFLAG_OUTOFSPACE
+ | CM_SCACHEFLAG_EACCESS);
scp->serverModTime = 0;
scp->dataVersion = 0;
+ scp->bufDataVersionLow = 0;
scp->bulkStatProgress = hzero;
scp->waitCount = 0;
+ scp->waitQueueT = NULL;
+
+ if (scp->cbServerp) {
+ cm_PutServer(scp->cbServerp);
+ scp->cbServerp = NULL;
+ }
+ scp->cbExpires = 0;
scp->fid.vnode = 0;
scp->fid.volume = 0;
scp->fid.unique = 0;
scp->fid.cell = 0;
-
- /* discard callback */
- if (scp->cbServerp) {
- cm_PutServer(scp->cbServerp);
- scp->cbServerp = NULL;
- }
- scp->cbExpires = 0;
+ scp->fid.hash = 0;
/* remove from dnlc */
cm_dnlcPurgedp(scp);
}
/* discard symlink info */
- scp->mountPointStringp[0] = 0;
+ scp->mountPointStringp[0] = '\0';
memset(&scp->mountRootFid, 0, sizeof(cm_fid_t));
memset(&scp->dotdotFid, 0, sizeof(cm_fid_t));
scp->serverLock = (-1);
scp->exclusiveLocks = 0;
scp->sharedLocks = 0;
+ scp->lockDataVersion = -1;
/* not locked, but there can be no references to this guy
* while we hold the global refcount lock.
*/
cm_FreeAllACLEnts(scp);
+#ifdef USE_BPLUS
+ /* destroy directory Bplus Tree */
+ if (scp->dirBplus) {
+ LARGE_INTEGER start, end;
+ QueryPerformanceCounter(&start);
+ bplus_free_tree++;
+ freeBtree(scp->dirBplus);
+ scp->dirBplus = NULL;
+ QueryPerformanceCounter(&end);
+
+ bplus_free_time += (end.QuadPart - start.QuadPart);
+ }
+#endif
return 0;
}
cm_scache_t *cm_GetNewSCache(void)
{
cm_scache_t *scp;
+ int retry = 0;
- start:
- if (cm_data.currentSCaches >= cm_data.maxSCaches) {
- for (scp = cm_data.scacheLRULastp;
- scp;
- scp = (cm_scache_t *) osi_QPrev(&scp->q)) {
- if (scp->refCount == 0)
- break;
- }
-
- if (scp) {
- osi_assert(scp >= cm_data.scacheBaseAddress && scp < (cm_scache_t *)cm_data.hashTablep);
-
- if (!cm_RecycleSCache(scp, 0)) {
-
+#if 0
+ /* first pass - look for deleted objects */
+ for ( scp = cm_data.scacheLRULastp;
+ scp;
+ scp = (cm_scache_t *) osi_QPrev(&scp->q))
+ {
+ osi_assertx(scp >= cm_data.scacheBaseAddress && scp < (cm_scache_t *)cm_data.scacheHashTablep,
+ "invalid cm_scache_t address");
+
+ if (scp->refCount == 0) {
+ if (scp->flags & CM_SCACHEFLAG_DELETED) {
+ osi_Log1(afsd_logp, "GetNewSCache attempting to recycle deleted scp 0x%x", scp);
+ if (!cm_RecycleSCache(scp, CM_SCACHE_RECYCLEFLAG_DESTROY_BUFFERS)) {
+
+ /* we found an entry, so return it */
+ /* now remove from the LRU queue and put it back at the
+ * head of the LRU queue.
+ */
+ cm_AdjustScacheLRU(scp);
+
+ /* and we're done */
+ return scp;
+ }
+ osi_Log1(afsd_logp, "GetNewSCache recycled failed scp 0x%x", scp);
+ } else if (!(scp->flags & CM_SCACHEFLAG_INHASH)) {
/* we found an entry, so return it */
/* now remove from the LRU queue and put it back at the
- * head of the LRU queue.
- */
- cm_AdjustLRU(scp);
+ * head of the LRU queue.
+ */
+ cm_AdjustScacheLRU(scp);
/* and we're done */
return scp;
- } else {
- /* We don't like this entry, choose another one. */
- goto start;
}
+ }
+ }
+ osi_Log0(afsd_logp, "GetNewSCache no deleted or recycled entries available for reuse");
+#endif
+
+ if (cm_data.currentSCaches >= cm_data.maxSCaches) {
+ /* There were no deleted scache objects that we could use. Try to find
+ * one that simply hasn't been used in a while.
+ */
+ for ( scp = cm_data.scacheLRULastp;
+ scp;
+ scp = (cm_scache_t *) osi_QPrev(&scp->q))
+ {
+ /* It is possible for the refCount to be zero and for there still
+ * to be outstanding dirty buffers. If there are dirty buffers,
+ * we must not recycle the scp. */
+ if (scp->refCount == 0 && scp->bufReadsp == NULL && scp->bufWritesp == NULL) {
+ if (!buf_DirtyBuffersExist(&scp->fid)) {
+ if (!cm_RecycleSCache(scp, 0)) {
+ /* we found an entry, so return it */
+ /* now remove from the LRU queue and put it back at the
+ * head of the LRU queue.
+ */
+ cm_AdjustScacheLRU(scp);
+
+ /* and we're done */
+ return scp;
+ }
+ } else {
+ osi_Log1(afsd_logp,"GetNewSCache dirty buffers exist scp 0x%x", scp);
+ }
+ }
}
+ osi_Log1(afsd_logp, "GetNewSCache all scache entries in use (retry = %d)", retry);
+
+ return NULL;
}
/* if we get here, we should allocate a new scache entry. We either are below
* quota or we have a leak and need to allocate a new one to avoid panicing.
*/
scp = cm_data.scacheBaseAddress + cm_data.currentSCaches;
- osi_assert(scp >= cm_data.scacheBaseAddress && scp < (cm_scache_t *)cm_data.hashTablep);
+ osi_assertx(scp >= cm_data.scacheBaseAddress && scp < (cm_scache_t *)cm_data.scacheHashTablep,
+ "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");
+#endif
scp->serverLock = -1;
/* and put it in the LRU queue */
cm_data.currentSCaches++;
cm_dnlcPurgedp(scp); /* make doubly sure that this is not in dnlc */
cm_dnlcPurgevp(scp);
+ scp->allNextp = cm_data.allSCachesp;
+ cm_data.allSCachesp = scp;
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
}
}
- for ( i=0; i < cm_data.hashTableSize; i++ ) {
- for ( scp = cm_data.hashTablep[i]; scp; scp = scp->nextp ) {
+ 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->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;
+ }
}
}
return cm_dnlcValidate();
}
+void
+cm_SuspendSCache(void)
+{
+ cm_scache_t * scp;
+ time_t now;
+
+ cm_GiveUpAllCallbacksAllServers(TRUE);
+
+ /*
+ * After this call all servers are marked down.
+ * Do not clear the callbacks, instead change the
+ * expiration time so that the callbacks will be expired
+ * when the servers are marked back up. However, we
+ * want the callbacks to be preserved as long as the
+ * servers are down. That way if the machine resumes
+ * without network, the stat cache item will still be
+ * considered valid.
+ */
+ now = time(NULL);
+
+ 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;
+ }
+ }
+ scp->cbExpires = now+1;
+ }
+ }
+ lock_ReleaseWrite(&cm_scacheLock);
+}
+
long
cm_ShutdownSCache(void)
{
cm_scache_t * scp;
- for ( scp = cm_data.scacheLRULastp; scp;
- scp = (cm_scache_t *) osi_QPrev(&scp->q) ) {
+ lock_ObtainWrite(&cm_scacheLock);
+
+ 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);
}
- lock_FinalizeMutex(&scp->mx);
+
+ if (scp->cbServerp) {
+ cm_PutServer(scp->cbServerp);
+ scp->cbServerp = NULL;
+ }
+ scp->cbExpires = 0;
+ scp->flags &= ~CM_SCACHEFLAG_CALLBACK;
+
+#ifdef USE_BPLUS
+ if (scp->dirBplus)
+ freeBtree(scp->dirBplus);
+ scp->dirBplus = NULL;
+ scp->dirDataVersion = -1;
+ lock_FinalizeRWLock(&scp->dirlock);
+#endif
+ lock_FinalizeRWLock(&scp->rw);
lock_FinalizeRWLock(&scp->bufCreateLock);
}
+ lock_ReleaseWrite(&cm_scacheLock);
+
+ cm_GiveUpAllCallbacksAllServers(FALSE);
return cm_dnlcShutdown();
}
if (osi_Once(&once)) {
lock_InitializeRWLock(&cm_scacheLock, "cm_scacheLock");
if ( newFile ) {
- memset(cm_data.hashTablep, 0, sizeof(cm_scache_t *) * cm_data.hashTableSize);
+ memset(cm_data.scacheHashTablep, 0, sizeof(cm_scache_t *) * cm_data.scacheHashTableSize);
+ cm_data.allSCachesp = NULL;
cm_data.currentSCaches = 0;
cm_data.maxSCaches = maxSCaches;
cm_data.scacheLRUFirstp = cm_data.scacheLRULastp = NULL;
} else {
cm_scache_t * scp;
- for ( scp = cm_data.scacheLRULastp; scp;
- scp = (cm_scache_t *) osi_QPrev(&scp->q) ) {
- lock_InitializeMutex(&scp->mx, "cm_scache_t mutex");
+ for ( scp = cm_data.allSCachesp; scp;
+ scp = scp->allNextp ) {
+ 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");
+#endif
scp->cbServerp = NULL;
scp->cbExpires = 0;
scp->fileLocksH = NULL;
scp->openShares = 0;
scp->openExcls = 0;
scp->waitCount = 0;
+#ifdef USE_BPLUS
+ scp->dirBplus = NULL;
+ scp->dirDataVersion = -1;
+#endif
+ scp->waitQueueT = NULL;
scp->flags &= ~CM_SCACHEFLAG_WAITING;
}
}
cm_freeFileLocks = NULL;
cm_lockRefreshCycle = 0;
cm_fakeSCacheInit(newFile);
+ cm_allFreeWaiters = NULL;
cm_dnlcInit(newFile);
osi_EndOnce(&once);
}
cm_scache_t *scp;
hash = CM_SCACHE_HASH(fidp);
-
- osi_assert(fidp->cell != 0);
- lock_ObtainWrite(&cm_scacheLock);
- for (scp=cm_data.hashTablep[hash]; scp; scp=scp->nextp) {
+ if (fidp->cell == 0) {
+ return NULL;
+ }
+
+ lock_ObtainRead(&cm_scacheLock);
+ for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
if (cm_FidCmp(fidp, &scp->fid) == 0) {
cm_HoldSCacheNoLock(scp);
- cm_AdjustLRU(scp);
+ lock_ConvertRToW(&cm_scacheLock);
+ cm_AdjustScacheLRU(scp);
lock_ReleaseWrite(&cm_scacheLock);
return scp;
}
}
- lock_ReleaseWrite(&cm_scacheLock);
+ lock_ReleaseRead(&cm_scacheLock);
return NULL;
}
+#ifdef DEBUG_REFCOUNT
+long cm_GetSCacheDbg(cm_fid_t *fidp, cm_scache_t **outScpp, cm_user_t *userp,
+ cm_req_t *reqp, char * file, long line)
+#else
long cm_GetSCache(cm_fid_t *fidp, cm_scache_t **outScpp, cm_user_t *userp,
cm_req_t *reqp)
+#endif
{
long hash;
cm_scache_t *scp;
long code;
- cm_volume_t *volp = 0;
+ cm_volume_t *volp = NULL;
cm_cell_t *cellp;
- char* mp = 0;
- 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_assert(fidp->cell != 0);
+ 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");
+ osi_Log0(afsd_logp,"cm_GetSCache called with root cell/volume and vnode=0 and unique=0");
}
// yj: check if we have the scp, if so, we don't need
// to do anything else
lock_ObtainWrite(&cm_scacheLock);
- for (scp=cm_data.hashTablep[hash]; scp; scp=scp->nextp) {
+ for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
if (cm_FidCmp(fidp, &scp->fid) == 0) {
+#ifdef DEBUG_REFCOUNT
+ 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
cm_HoldSCacheNoLock(scp);
*outScpp = scp;
- cm_AdjustLRU(scp);
+ cm_AdjustScacheLRU(scp);
lock_ReleaseWrite(&cm_scacheLock);
return 0;
}
}
-
+
// yj: when we get here, it means we don't have an scp
// so we need to either load it or fake it, depending
// on whether the file is "special", see below.
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");
+ osi_Log0(afsd_logp,"cm_GetSCache Freelance and isRoot");
/* freelance: if we are trying to get the root scp for the first
* time, we will just put in a place holder entry.
*/
}
if (cm_freelanceEnabled && special) {
- 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);
+ char mp[MOUNTPOINTLEN] = "";
+ afs_uint32 fileType;
+
+ osi_Log0(afsd_logp,"cm_GetSCache Freelance and special");
+ 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;
+
}
+ lock_ReleaseMutex(&cm_Freelance_Lock);
+
scp = cm_GetNewSCache();
-
- lock_ObtainMutex(&scp->mx);
+ if (scp == NULL) {
+ osi_Log0(afsd_logp,"cm_GetSCache unable to obtain *new* scache entry");
+ lock_ReleaseWrite(&cm_scacheLock);
+ return CM_ERROR_WOULDBLOCK;
+ }
+
+#if not_too_dangerous
+ /* dropping the cm_scacheLock allows more than one thread
+ * to obtain the same cm_scache_t from the LRU list. Since
+ * the refCount is known to be zero at this point we have to
+ * assume that no one else is using the one this is returned.
+ */
+ lock_ReleaseWrite(&cm_scacheLock);
+ lock_ObtainWrite(&scp->rw);
+ lock_ObtainWrite(&cm_scacheLock);
+#endif
scp->fid = *fidp;
scp->volp = cm_data.rootSCachep->volp;
+ if (scp->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.hashTablep[hash];
- cm_data.hashTablep[hash]=scp;
+ scp->nextp=cm_data.scacheHashTablep[hash];
+ cm_data.scacheHashTablep[hash]=scp;
scp->flags |= CM_SCACHEFLAG_INHASH;
scp->refCount = 1;
- 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);
+ osi_Log1(afsd_logp,"cm_GetSCache (freelance) sets refCount to 1 scp 0x%x", scp);
+ 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=0x1ff;
+ scp->unixModeBits=0777;
scp->clientModTime=FakeFreelanceModTime;
scp->serverModTime=FakeFreelanceModTime;
scp->parentUnique = 0x1;
scp->parentVnode=0x1;
scp->group=0;
scp->dataVersion=cm_data.fakeDirVersion;
+ scp->bufDataVersionLow=cm_data.fakeDirVersion;
scp->lockDataVersion=-1; /* no lock yet */
- lock_ReleaseMutex(&scp->mx);
- *outScpp = scp;
+#if not_too_dangerous
+ lock_ReleaseWrite(&scp->rw);
+#endif
+ *outScpp = scp;
lock_ReleaseWrite(&cm_scacheLock);
+#ifdef DEBUG_REFCOUNT
+ afsi_log("%s:%d cm_GetSCache (2) outScpp 0x%p ref %d", file, line, scp, scp->refCount);
+ osi_Log1(afsd_logp,"cm_GetSCache (2) outScpp 0x%p", scp);
+#endif
return 0;
}
// end of yj code
/* 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, &volp);
+ code = cm_GetVolumeByID(cellp, fidp->volume, userp, reqp, CM_GETVOL_FLAG_CREATE, &volp);
if (code)
return code;
lock_ObtainWrite(&cm_scacheLock);
/* otherwise, we have the volume, now reverify that the scp doesn't
* exist, and proceed.
*/
- for (scp=cm_data.hashTablep[hash]; scp; scp=scp->nextp) {
+ for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
if (cm_FidCmp(fidp, &scp->fid) == 0) {
+#ifdef DEBUG_REFCOUNT
+ afsi_log("%s:%d cm_GetSCache (3) outScpp 0x%p ref %d", file, line, scp, scp->refCount);
+ osi_Log1(afsd_logp,"cm_GetSCache (3) outScpp 0x%p", scp);
+#endif
cm_HoldSCacheNoLock(scp);
- osi_assert(scp->volp == volp);
- cm_AdjustLRU(scp);
+ osi_assertx(scp->volp == volp, "cm_scache_t volume has unexpected value");
+ cm_AdjustScacheLRU(scp);
lock_ReleaseWrite(&cm_scacheLock);
if (volp)
cm_PutVolume(volp);
/* now, if we don't have the fid, recycle something */
scp = cm_GetNewSCache();
- osi_assert(!(scp->flags & CM_SCACHEFLAG_INHASH));
- lock_ObtainMutex(&scp->mx);
+ if (scp == NULL) {
+ osi_Log0(afsd_logp,"cm_GetNewSCache unable to obtain *new* scache entry");
+ lock_ReleaseWrite(&cm_scacheLock);
+ if (volp)
+ cm_PutVolume(volp);
+ return CM_ERROR_WOULDBLOCK;
+ }
+ osi_Log2(afsd_logp,"cm_GetNewSCache returns scp 0x%x flags 0x%x", scp, scp->flags);
+
+ osi_assertx(!(scp->flags & CM_SCACHEFLAG_INHASH), "CM_SCACHEFLAG_INHASH set");
+
+#if not_too_dangerous
+ /* dropping the cm_scacheLock allows more than one thread
+ * to obtain the same cm_scache_t from the LRU list. Since
+ * the refCount is known to be zero at this point we have to
+ * assume that no one else is using the one this is returned.
+ */
+ lock_ReleaseWrite(&cm_scacheLock);
+ lock_ObtainWrite(&scp->rw);
+ lock_ObtainWrite(&cm_scacheLock);
+#endif
scp->fid = *fidp;
scp->volp = volp; /* a held reference */
scp->dotdotFid = volp->dotdotFid;
}
- if (volp->roID == fidp->volume)
+ if (volp->ro.ID == fidp->volume)
scp->flags |= (CM_SCACHEFLAG_PURERO | CM_SCACHEFLAG_RO);
- else if (volp->bkID == fidp->volume)
+ else if (volp->bk.ID == fidp->volume)
scp->flags |= CM_SCACHEFLAG_RO;
}
- scp->nextp = cm_data.hashTablep[hash];
- cm_data.hashTablep[hash] = scp;
+ scp->nextp = cm_data.scacheHashTablep[hash];
+ cm_data.scacheHashTablep[hash] = scp;
scp->flags |= CM_SCACHEFLAG_INHASH;
scp->refCount = 1;
- lock_ReleaseMutex(&scp->mx);
+ osi_Log1(afsd_logp,"cm_GetSCache sets refCount to 1 scp 0x%x", scp);
+#if not_too_dangerous
+ lock_ReleaseWrite(&scp->rw);
+#endif
/* XXX - The following fields in the cm_scache are
* uninitialized:
/* now we have a held scache entry; just return it */
*outScpp = scp;
+#ifdef DEBUG_REFCOUNT
+ afsi_log("%s:%d cm_GetSCache (4) outScpp 0x%p ref %d", file, line, scp, scp->refCount);
+ osi_Log1(afsd_logp,"cm_GetSCache (4) outScpp 0x%p", scp);
+#endif
return 0;
}
cm_scache_t * pscp = NULL;
lock_ObtainWrite(&cm_scacheLock);
- parent_fid = scp->fid;
- parent_fid.vnode = scp->parentVnode;
- parent_fid.unique = scp->parentUnique;
+ cm_SetFid(&parent_fid, scp->fid.cell, scp->fid.volume, scp->parentVnode, scp->parentUnique);
if (cm_FidCmp(&scp->fid, &parent_fid)) {
- for (i=0; i<cm_data.hashTableSize; i++) {
- for (pscp = cm_data.hashTablep[i]; pscp; pscp = pscp->nextp) {
- if (!cm_FidCmp(&pscp->fid, &parent_fid)) {
- cm_HoldSCacheNoLock(pscp);
- break;
- }
+ i = CM_SCACHE_HASH(&parent_fid);
+ for (pscp = cm_data.scacheHashTablep[i]; pscp; pscp = pscp->nextp) {
+ if (!cm_FidCmp(&pscp->fid, &parent_fid)) {
+ cm_HoldSCacheNoLock(pscp);
+ break;
}
}
}
+
lock_ReleaseWrite(&cm_scacheLock);
return pscp;
}
+void cm_SyncOpAddToWaitQueue(cm_scache_t * scp, afs_int32 flags, cm_buf_t * bufp)
+{
+ cm_scache_waiter_t * w;
+
+ /* Do not use the queue for asynchronous store operations */
+ if (flags == CM_SCACHESYNC_ASYNCSTORE)
+ return;
+
+ lock_ObtainWrite(&cm_scacheLock);
+ if (cm_allFreeWaiters == NULL) {
+ w = malloc(sizeof(*w));
+ memset(w, 0, sizeof(*w));
+ } else {
+ w = (cm_scache_waiter_t *) cm_allFreeWaiters;
+ osi_QRemove(&cm_allFreeWaiters, (osi_queue_t *) w);
+ }
+
+ w->threadId = thrd_Current();
+ w->scp = scp;
+ cm_HoldSCacheNoLock(scp);
+ w->flags = flags;
+ w->bufp = bufp;
+
+ osi_QAddT(&scp->waitQueueH, &scp->waitQueueT, (osi_queue_t *) w);
+ lock_ReleaseWrite(&cm_scacheLock);
+
+ osi_Log2(afsd_logp, "cm_SyncOpAddToWaitQueue : Adding thread to wait queue scp 0x%p w 0x%p", scp, w);
+}
+
+int cm_SyncOpCheckContinue(cm_scache_t * scp, afs_int32 flags, cm_buf_t * bufp)
+{
+ cm_scache_waiter_t * w;
+ int this_is_me;
+
+ /* Do not use the queue for asynchronous store operations */
+ if (flags == CM_SCACHESYNC_ASYNCSTORE)
+ return 1;
+
+ osi_Log0(afsd_logp, "cm_SyncOpCheckContinue checking for continuation");
+
+ lock_ObtainRead(&cm_scacheLock);
+ for (w = (cm_scache_waiter_t *)scp->waitQueueH;
+ w;
+ w = (cm_scache_waiter_t *)osi_QNext((osi_queue_t *) w)) {
+ if (w->flags == flags && w->bufp == bufp) {
+ break;
+ }
+ }
+
+ osi_assertx(w != NULL, "null cm_scache_waiter_t");
+ this_is_me = (w->threadId == thrd_Current());
+ lock_ReleaseRead(&cm_scacheLock);
+
+ if (!this_is_me) {
+ osi_Log1(afsd_logp, "cm_SyncOpCheckContinue MISS: Waiter 0x%p", w);
+ return 0;
+ }
+
+ osi_Log1(afsd_logp, "cm_SyncOpCheckContinue HIT: Waiter 0x%p", w);
+
+ lock_ObtainWrite(&cm_scacheLock);
+ osi_QRemoveHT(&scp->waitQueueH, &scp->waitQueueT, (osi_queue_t *) w);
+ cm_ReleaseSCacheNoLock(scp);
+ memset(w, 0, sizeof(*w));
+ osi_QAdd(&cm_allFreeWaiters, (osi_queue_t *) w);
+ lock_ReleaseWrite(&cm_scacheLock);
+
+ return 1;
+}
+
+
/* synchronize a fetch, store, read, write, fetch status or store status.
* Called with scache mutex held, and returns with it held, but temporarily
* drops it during the fetch.
cm_buf_t *tbufp;
afs_uint32 outRights;
int bufLocked;
+ afs_uint32 sleep_scp_flags = 0;
+ afs_uint32 sleep_buf_cmflags = 0;
+ afs_uint32 sleep_scp_bufs = 0;
+ int wakeupCycle;
/* lookup this first */
bufLocked = flags & CM_SCACHESYNC_BUFLOCKED;
- /* some minor assertions */
- if (flags & (CM_SCACHESYNC_STOREDATA | CM_SCACHESYNC_FETCHDATA
- | CM_SCACHESYNC_READ | CM_SCACHESYNC_WRITE
- | CM_SCACHESYNC_SETSIZE)) {
- if (bufp) {
- osi_assert(bufp->refCount > 0);
- /*
- osi_assert(cm_FidCmp(&bufp->fid, &scp->fid) == 0);
- */
- }
- }
- else osi_assert(bufp == NULL);
+ if (bufp)
+ osi_assertx(bufp->refCount > 0, "cm_buf_t refCount 0");
+
/* Do the access check. Now we don't really do the access check
* atomically, since the caller doesn't expect the parent dir to be
osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING|GETCALLBACK want FETCHDATA", scp);
goto sleep;
}
- if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING))) {
- osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMFETCHING|BUF_CMSTORING want FETCHDATA", scp, bufp);
+ if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING | CM_BUF_CMWRITING))) {
+ osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMFETCHING|BUF_CMSTORING|BUF_CMWRITING want FETCHDATA", scp, bufp);
goto sleep;
}
}
osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING|GETCALLBACK want STOREDATA", scp);
goto sleep;
}
- if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING))) {
- osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMFETCHING|BUF_CMSTORING want STOREDATA", scp, bufp);
+ if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING | CM_BUF_CMWRITING))) {
+ osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMFETCHING|BUF_CMSTORING|BUF_CMWRITING want STOREDATA", scp, bufp);
goto sleep;
}
}
osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMFETCHING want READ", scp, bufp);
goto sleep;
}
+ if (bufp && (bufp->cmFlags & CM_BUF_CMWRITING)) {
+ osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMWRITING want READ", scp, bufp);
+ goto sleep;
+ }
}
if (flags & CM_SCACHESYNC_WRITE) {
/* don't write unless the status is stable and the chunk
osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING want WRITE", scp);
goto sleep;
}
- if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING))) {
- osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMFETCHING|BUF_CMSTORING want WRITE", scp, bufp);
+ if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING |
+ CM_BUF_CMSTORING |
+ CM_BUF_CMWRITING))) {
+ osi_Log3(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is %s want WRITE",
+ scp, bufp,
+ ((bufp->cmFlags & CM_BUF_CMFETCHING) ? "CM_BUF_CMFETCHING":
+ ((bufp->cmFlags & CM_BUF_CMSTORING) ? "CM_BUF_CMSTORING" :
+ ((bufp->cmFlags & CM_BUF_CMWRITING) ? "CM_BUF_CMWRITING" :
+ "UNKNOWN!!!"))));
goto sleep;
}
}
// yj: modified this so that callback only checked if we're
// not checking something on /afs
/* fix the conditional to match the one in cm_HaveCallback */
- if ( (flags & CM_SCACHESYNC_NEEDCALLBACK)
+ if ((flags & CM_SCACHESYNC_NEEDCALLBACK)
#ifdef AFS_FREELANCE_CLIENT
&& (!cm_freelanceEnabled ||
!(scp->fid.vnode==0x1 && scp->fid.unique==0x1) ||
cm_fakeDirCallback < 2)
#endif /* AFS_FREELANCE_CLIENT */
) {
- if (!cm_HaveCallback(scp)) {
+ if ((flags & CM_SCACHESYNC_FORCECB) || !cm_HaveCallback(scp)) {
osi_Log1(afsd_logp, "CM SyncOp getting callback on scp 0x%p",
scp);
if (bufLocked)
lock_ReleaseMutex(&bufp->mx);
- code = cm_GetCallback(scp, userp, reqp, 0);
+ 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;
+ flags &= ~CM_SCACHESYNC_FORCECB; /* only force once */
continue;
}
}
if (rights) {
/* can't check access rights without a callback */
- osi_assert(flags & CM_SCACHESYNC_NEEDCALLBACK);
+ osi_assertx(flags & CM_SCACHESYNC_NEEDCALLBACK, "!CM_SCACHESYNC_NEEDCALLBACK");
if ((rights & PRSFS_WRITE) && (scp->flags & CM_SCACHEFLAG_RO))
return CM_ERROR_READONLY;
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;
if (flags & CM_SCACHESYNC_NOWAIT)
return CM_ERROR_WOULDBLOCK;
+ /* These are used for minidump debugging */
+ sleep_scp_flags = scp->flags; /* so we know why we slept */
+ sleep_buf_cmflags = bufp ? bufp->cmFlags : 0;
+ sleep_scp_bufs = (scp->bufReadsp ? 1 : 0) | (scp->bufWritesp ? 2 : 0);
+
/* wait here, then try again */
osi_Log1(afsd_logp, "CM SyncOp sleeping scp 0x%p", scp);
if ( scp->flags & CM_SCACHEFLAG_WAITING ) {
scp->flags |= CM_SCACHEFLAG_WAITING;
scp->waitCount = scp->waitRequests = 1;
}
- if (bufLocked)
- lock_ReleaseMutex(&bufp->mx);
- osi_SleepM((LONG_PTR) &scp->flags, &scp->mx);
+
+ cm_SyncOpAddToWaitQueue(scp, flags, bufp);
+ wakeupCycle = 0;
+ do {
+ 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);
if (bufp) {
for(qdp = scp->bufReadsp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
tbufp = osi_GetQData(qdp);
- osi_assert(tbufp != bufp);
+ osi_assertx(tbufp != bufp, "unexpected cm_buf_t value");
}
}
if (bufp) {
for(qdp = scp->bufWritesp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
tbufp = osi_GetQData(qdp);
- osi_assert(tbufp != bufp);
+ osi_assertx(tbufp != bufp, "unexpected cm_buf_t value");
}
}
osi_QAdd((osi_queue_t **) &scp->bufWritesp, &qdp->q);
}
+ if (flags & CM_SCACHESYNC_WRITE) {
+ /* mark the buffer as being written to. */
+ if (bufp) {
+ bufp->cmFlags |= CM_BUF_CMWRITING;
+ }
+ }
+
return 0;
}
osi_queueData_t *qdp;
cm_buf_t *tbufp;
+ lock_AssertWrite(&scp->rw);
+
/* now, update the recorded state for RPC-type calls */
if (flags & CM_SCACHESYNC_FETCHSTATUS)
scp->flags &= ~CM_SCACHEFLAG_FETCHING;
/* now update the buffer pointer */
if (flags & CM_SCACHESYNC_FETCHDATA) {
- /* ensure that the buffer isn't already in the I/O list */
+ int release = 0;
+
+ /* ensure that the buffer isn't already in the I/O list */
for(qdp = scp->bufReadsp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
tbufp = osi_GetQData(qdp);
- if (tbufp == bufp) break;
+ if (tbufp == bufp)
+ break;
}
- osi_assert(qdp != NULL);
- osi_assert(osi_GetQData(qdp) == bufp);
- osi_QRemove((osi_queue_t **) &scp->bufReadsp, &qdp->q);
- osi_QDFree(qdp);
+ if (qdp) {
+ osi_QRemove((osi_queue_t **) &scp->bufReadsp, &qdp->q);
+ osi_QDFree(qdp);
+ release = 1;
+ }
if (bufp) {
bufp->cmFlags &= ~(CM_BUF_CMFETCHING | CM_BUF_CMFULLYFETCHED);
if (bufp->flags & CM_BUF_WAITING) {
osi_Log2(afsd_logp, "CM SyncOpDone Waking [scp 0x%p] bufp 0x%p", scp, bufp);
osi_Wakeup((LONG_PTR) &bufp);
}
- buf_Release(bufp);
+ if (release)
+ buf_Release(bufp);
}
}
/* now update the buffer pointer */
if (flags & CM_SCACHESYNC_STOREDATA) {
+ int release = 0;
/* ensure that the buffer isn't already in the I/O list */
for(qdp = scp->bufWritesp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
tbufp = osi_GetQData(qdp);
- if (tbufp == bufp) break;
+ if (tbufp == bufp)
+ break;
}
- osi_assert(qdp != NULL);
- osi_assert(osi_GetQData(qdp) == bufp);
- osi_QRemove((osi_queue_t **) &scp->bufWritesp, &qdp->q);
- osi_QDFree(qdp);
+ if (qdp) {
+ osi_QRemove((osi_queue_t **) &scp->bufWritesp, &qdp->q);
+ osi_QDFree(qdp);
+ release = 1;
+ }
if (bufp) {
bufp->cmFlags &= ~CM_BUF_CMSTORING;
if (bufp->flags & CM_BUF_WAITING) {
osi_Log2(afsd_logp, "CM SyncOpDone Waking [scp 0x%p] bufp 0x%p", scp, bufp);
osi_Wakeup((LONG_PTR) &bufp);
}
- buf_Release(bufp);
+ if (release)
+ buf_Release(bufp);
+ }
+ }
+
+ if (flags & CM_SCACHESYNC_WRITE) {
+ if (bufp) {
+ osi_assertx(bufp->cmFlags & CM_BUF_CMWRITING, "!CM_BUF_CMWRITING");
+
+ bufp->cmFlags &= ~CM_BUF_CMWRITING;
}
}
* handled after the callback breaking is done, but only one of whose calls
* started before that, can cause old info to be merged from the first call.
*/
-void cm_MergeStatus(cm_scache_t *scp, AFSFetchStatus *statusp, AFSVolSync *volp,
+void cm_MergeStatus(cm_scache_t *dscp,
+ cm_scache_t *scp, AFSFetchStatus *statusp,
+ AFSVolSync *volsyncp,
cm_user_t *userp, afs_uint32 flags)
{
+ afs_uint64 dataVersion;
+
// yj: i want to create some fake status for the /afs directory and the
// entries under that directory
#ifdef AFS_FREELANCE_CLIENT
statusp->FileType = CM_SCACHETYPE_DIRECTORY;
statusp->LinkCount = scp->linkCount;
statusp->Length = cm_fakeDirSize;
- statusp->DataVersion = cm_data.fakeDirVersion;
+ statusp->Length_hi = 0;
+ statusp->DataVersion = (afs_uint32)(cm_data.fakeDirVersion & 0xFFFFFFFF);
statusp->Author = 0x1;
statusp->Owner = 0x0;
statusp->CallerAccess = 0x9;
statusp->AnonymousAccess = 0x9;
- statusp->UnixModeBits = 0x1ff;
+ statusp->UnixModeBits = 0777;
statusp->ParentVnode = 0x1;
statusp->ParentUnique = 0x1;
statusp->ResidencyMask = 0;
statusp->ServerModTime = FakeFreelanceModTime;
statusp->Group = 0;
statusp->SyncCounter = 0;
- statusp->dataVersionHigh = 0;
+ statusp->dataVersionHigh = (afs_uint32)(cm_data.fakeDirVersion >> 32);
+ statusp->errorCode = 0;
}
#endif /* AFS_FREELANCE_CLIENT */
- if (!(flags & CM_MERGEFLAG_FORCE)
- && statusp->DataVersion < (unsigned long) scp->dataVersion) {
+ if (statusp->errorCode != 0) {
+ scp->flags |= CM_SCACHEFLAG_EACCESS;
+ osi_Log2(afsd_logp, "Merge, Failure scp %x code 0x%x", scp, statusp->errorCode);
+
+ scp->fileType = 0; /* unknown */
+
+ scp->serverModTime = 0;
+ scp->clientModTime = 0;
+ scp->length.LowPart = 0;
+ scp->length.HighPart = 0;
+ scp->serverLength.LowPart = 0;
+ scp->serverLength.HighPart = 0;
+ scp->linkCount = 0;
+ scp->owner = 0;
+ scp->group = 0;
+ scp->unixModeBits = 0;
+ scp->anyAccess = 0;
+ scp->dataVersion = 0;
+ scp->bufDataVersionLow = 0;
+
+ if (dscp) {
+ scp->parentVnode = dscp->fid.vnode;
+ scp->parentUnique = dscp->fid.unique;
+ } else {
+ scp->parentVnode = 0;
+ scp->parentUnique = 0;
+ }
+ return;
+ } else {
+ scp->flags &= ~CM_SCACHEFLAG_EACCESS;
+ }
+
+ dataVersion = statusp->dataVersionHigh;
+ dataVersion <<= 32;
+ dataVersion |= statusp->DataVersion;
+
+ 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_req_t *) NULL, &volp);
+ (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,
volp ? volp->namep : "(unknown)");
cm_PutVolume(volp);
}
osi_Log3(afsd_logp, "Bad merge, scp %x, scp dv %d, RPC dv %d",
- scp, scp->dataVersion, statusp->DataVersion);
+ 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
* server by its mtime.
if (!(scp->flags & CM_SCACHEFLAG_RO))
return;
}
+
scp->serverModTime = statusp->ServerModTime;
if (!(scp->mask & CM_SCACHEMASK_CLIENTMODTIME)) {
}
if (!(scp->mask & CM_SCACHEMASK_LENGTH)) {
scp->length.LowPart = statusp->Length;
- scp->length.HighPart = 0;
+ scp->length.HighPart = statusp->Length_hi;
}
scp->serverLength.LowPart = statusp->Length;
- scp->serverLength.HighPart = 0;
+ scp->serverLength.HighPart = statusp->Length_hi;
scp->linkCount = statusp->LinkCount;
- scp->dataVersion = statusp->DataVersion;
scp->owner = statusp->Owner;
scp->group = statusp->Group;
scp->unixModeBits = statusp->UnixModeBits & 07777;
scp->fileType = CM_SCACHETYPE_SYMLINK;
}
else {
- osi_Log1(afsd_logp, "Merge, Invalid File Type, scp %x", scp);
- scp->fileType = 0; /* invalid */
+ osi_Log2(afsd_logp, "Merge, Invalid File Type (%d), scp %x", statusp->FileType, scp);
+ scp->fileType = CM_SCACHETYPE_INVALID; /* invalid */
}
/* and other stuff */
scp->parentVnode = statusp->ParentVnode;
if (userp != NULL) {
cm_AddACLCache(scp, userp, statusp->CallerAccess);
}
+
+ 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
+ * if the buffers are removed from the hash tables.
+ *
+ * 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;
+ cm_buf_t *tbp;
+ cm_buf_t *bp, *prevBp, *nextBp;
+
+ lock_ObtainWrite(&buf_globalLock);
+ i = BUF_FILEHASH(&scp->fid);
+ 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;
+ }
+
+ *lbpp = bp->hashp; /* hash out */
+ bp->hashp = NULL;
+
+ 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;
}
/* 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';
}
afsFidp->Unique = fidp->unique;
}
+#ifdef DEBUG_REFCOUNT
+void cm_HoldSCacheNoLockDbg(cm_scache_t *scp, char * file, long line)
+#else
void cm_HoldSCacheNoLock(cm_scache_t *scp)
-{
- osi_assert(scp != 0);
- osi_assert(scp->refCount >= 0);
- scp->refCount++;
+#endif
+{
+ afs_int32 refCount;
+
+ osi_assertx(scp != NULL, "null cm_scache_t");
+ lock_AssertAny(&cm_scacheLock);
+ refCount = InterlockedIncrement(&scp->refCount);
+#ifdef DEBUG_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
}
+#ifdef DEBUG_REFCOUNT
+void cm_HoldSCacheDbg(cm_scache_t *scp, char * file, long line)
+#else
void cm_HoldSCache(cm_scache_t *scp)
+#endif
{
- osi_assert(scp != 0);
- lock_ObtainWrite(&cm_scacheLock);
- osi_assert(scp->refCount >= 0);
- scp->refCount++;
- lock_ReleaseWrite(&cm_scacheLock);
+ afs_int32 refCount;
+
+ osi_assertx(scp != NULL, "null cm_scache_t");
+ lock_ObtainRead(&cm_scacheLock);
+ refCount = InterlockedIncrement(&scp->refCount);
+#ifdef DEBUG_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_ReleaseRead(&cm_scacheLock);
}
+#ifdef DEBUG_REFCOUNT
+void cm_ReleaseSCacheNoLockDbg(cm_scache_t *scp, char * file, long line)
+#else
void cm_ReleaseSCacheNoLock(cm_scache_t *scp)
+#endif
{
- osi_assert(scp != 0);
- osi_assert(scp->refCount-- >= 0);
+ afs_int32 refCount;
+ osi_assertx(scp != NULL, "null cm_scache_t");
+ lock_AssertAny(&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);
+#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, refCount);
+ afsi_log("%s:%d cm_ReleaseSCacheNoLock scp 0x%p ref %d", file, line, scp, refCount);
+#endif
}
+#ifdef DEBUG_REFCOUNT
+void cm_ReleaseSCacheDbg(cm_scache_t *scp, char * file, long line)
+#else
void cm_ReleaseSCache(cm_scache_t *scp)
-{
- osi_assert(scp != 0);
- lock_ObtainWrite(&cm_scacheLock);
- osi_assert(scp->refCount != 0);
- scp->refCount--;
- lock_ReleaseWrite(&cm_scacheLock);
+#endif
+{
+ afs_int32 refCount;
+
+ osi_assertx(scp != NULL, "null cm_scache_t");
+ 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);
+#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, refCount);
+ afsi_log("%s:%d cm_ReleaseSCache scp 0x%p ref %d", file, line, scp, refCount);
+#endif
+ lock_ReleaseRead(&cm_scacheLock);
}
/* just look for the scp entry to get filetype */
hash = CM_SCACHE_HASH(fidp);
- osi_assert(fidp->cell != 0);
+ osi_assertx(fidp->cell != 0, "unassigned cell value");
lock_ObtainWrite(&cm_scacheLock);
- for (scp=cm_data.hashTablep[hash]; scp; scp=scp->nextp) {
+ for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
if (cm_FidCmp(fidp, &scp->fid) == 0) {
lock_ReleaseWrite(&cm_scacheLock);
return scp->fileType;
{
int zilch;
cm_scache_t *scp;
- char output[1024];
+ char output[2048];
int i;
if (lock)
lock_ObtainRead(&cm_scacheLock);
- sprintf(output, "%s - dumping scache - cm_data.currentSCaches=%d, cm_data.maxSCaches=%d\n", cookie, cm_data.currentSCaches, cm_data.maxSCaches);
+ sprintf(output, "%s - dumping all scache - cm_data.currentSCaches=%d, cm_data.maxSCaches=%d\r\n", cookie, cm_data.currentSCaches, cm_data.maxSCaches);
WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
- for (scp = cm_data.scacheLRULastp; scp; scp = (cm_scache_t *) osi_QPrev(&scp->q))
+ for (scp = cm_data.allSCachesp; scp; scp = scp->allNextp)
{
- if (scp->refCount != 0)
- {
- sprintf(output, "%s fid (cell=%d, volume=%d, vnode=%d, unique=%d) refCount=%u\n",
- cookie, scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique,
- scp->refCount);
- WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
- }
+ 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",
+ 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,
+ (unsigned long)scp->cbExpires, scp->refCount);
+ WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
}
- sprintf(output, "%s - dumping cm_data.hashTable - cm_data.hashTableSize=%d\n", cookie, cm_data.hashTableSize);
+ sprintf(output, "%s - Done dumping all scache.\r\n", cookie);
+ WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
+ sprintf(output, "%s - dumping cm_data.scacheHashTable - cm_data.scacheHashTableSize=%d\r\n", cookie, cm_data.scacheHashTableSize);
WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
- for (i = 0; i < cm_data.hashTableSize; i++)
+ for (i = 0; i < cm_data.scacheHashTableSize; i++)
{
- for(scp = cm_data.hashTablep[i]; scp; scp=scp->nextp)
+ for(scp = cm_data.scacheHashTablep[i]; scp; scp=scp->nextp)
{
- if (scp->refCount != 0)
- {
- sprintf(output, "%s scp=0x%p, hash=%d, fid (cell=%d, volume=%d, vnode=%d, unique=%d) refCount=%u\n",
- cookie, scp, i, scp->fid.cell, scp->fid.volume, scp->fid.vnode,
- scp->fid.unique, scp->refCount);
- WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
- }
+ sprintf(output, "%s scp=0x%p, hash=%d, fid (cell=%d, volume=%d, vnode=%d, unique=%d)\r\n",
+ cookie, scp, i, scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
+ WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
}
}
- sprintf(output, "%s - Done dumping scache.\n", cookie);
+ sprintf(output, "%s - Done dumping cm_data.scacheHashTable\r\n", cookie);
WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
if (lock)
git://git.openafs.org / openafs.git / blobdiff