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[NTOSKRNL]

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- Fix inconsistent locking

svn path=/trunk/; revision=54746
This commit is contained in:
Cameron Gutman 2011-12-24 03:57:10 +00:00
parent ed15dc5d11
commit 6ababb3a3f
1 changed files with 36 additions and 23 deletions
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59
reactos/ntoskrnl/cc/view.c
View file

@ -398,7 +398,7 @@ CcRosReleaseCacheSegment(PBCB Bcb,
BOOLEAN Dirty,
BOOLEAN Mapped)
{
BOOLEAN WasDirty = CacheSeg->Dirty;
BOOLEAN WasDirty;
KIRQL oldIrql;
ASSERT(Bcb);
@ -406,10 +406,14 @@ CcRosReleaseCacheSegment(PBCB Bcb,
DPRINT("CcReleaseCacheSegment(Bcb 0x%p, CacheSeg 0x%p, Valid %d)\n",
Bcb, CacheSeg, Valid);
KeAcquireGuardedMutex(&ViewLock);
KeAcquireSpinLock(&Bcb->BcbLock, &oldIrql);
CacheSeg->Valid = Valid;
WasDirty = CacheSeg->Dirty;
CacheSeg->Dirty = CacheSeg->Dirty || Dirty;
KeAcquireGuardedMutex(&ViewLock);
if (!WasDirty && CacheSeg->Dirty)
{
InsertTailList(&DirtySegmentListHead, &CacheSeg->DirtySegmentListEntry);
@ -420,7 +424,6 @@ CcRosReleaseCacheSegment(PBCB Bcb,
{
CacheSeg->MappedCount++;
}
KeAcquireSpinLock(&Bcb->BcbLock, &oldIrql);
CcRosCacheSegmentDecRefCount(CacheSeg);
if (Mapped && CacheSeg->MappedCount == 1)
{
@ -430,6 +433,7 @@ CcRosReleaseCacheSegment(PBCB Bcb,
{
CcRosCacheSegmentIncRefCount(CacheSeg);
}
KeReleaseSpinLock(&Bcb->BcbLock, oldIrql);
KeReleaseGuardedMutex(&ViewLock);
KeReleaseMutex(&CacheSeg->Mutex, 0);
@ -449,8 +453,10 @@ CcRosLookupCacheSegment(PBCB Bcb, ULONG FileOffset)
ASSERT(Bcb);
DPRINT("CcRosLookupCacheSegment(Bcb -x%p, FileOffset %d)\n", Bcb, FileOffset);
KeAcquireGuardedMutex(&ViewLock);
KeAcquireSpinLock(&Bcb->BcbLock, &oldIrql);
current_entry = Bcb->BcbSegmentListHead.Flink;
while (current_entry != &Bcb->BcbSegmentListHead)
{
@ -461,6 +467,7 @@ CcRosLookupCacheSegment(PBCB Bcb, ULONG FileOffset)
{
CcRosCacheSegmentIncRefCount(current);
KeReleaseSpinLock(&Bcb->BcbLock, oldIrql);
KeReleaseGuardedMutex(&ViewLock);
KeWaitForSingleObject(&current->Mutex,
Executive,
KernelMode,
@ -470,7 +477,10 @@ CcRosLookupCacheSegment(PBCB Bcb, ULONG FileOffset)
}
current_entry = current_entry->Flink;
}
KeReleaseSpinLock(&Bcb->BcbLock, oldIrql);
KeReleaseGuardedMutex(&ViewLock);
return(NULL);
}
@ -490,29 +500,28 @@ CcRosMarkDirtyCacheSegment(PBCB Bcb, ULONG FileOffset)
{
KeBugCheck(CACHE_MANAGER);
}
if (!CacheSeg->Dirty)
{
KeAcquireGuardedMutex(&ViewLock);
InsertTailList(&DirtySegmentListHead, &CacheSeg->DirtySegmentListEntry);
DirtyPageCount += Bcb->CacheSegmentSize / PAGE_SIZE;
KeReleaseGuardedMutex(&ViewLock);
}
else
{
KeAcquireSpinLock(&Bcb->BcbLock, &oldIrql);
CcRosCacheSegmentDecRefCount(CacheSeg);
KeReleaseSpinLock(&Bcb->BcbLock, oldIrql);
}
KeAcquireGuardedMutex(&ViewLock);
KeAcquireSpinLock(&Bcb->BcbLock, &oldIrql);
if (!CacheSeg->Dirty)
{
InsertTailList(&DirtySegmentListHead, &CacheSeg->DirtySegmentListEntry);
DirtyPageCount += Bcb->CacheSegmentSize / PAGE_SIZE;
}
else
{
CcRosCacheSegmentDecRefCount(CacheSeg);
}
/* Move to the tail of the LRU list */
RemoveEntryList(&CacheSeg->CacheSegmentLRUListEntry);
InsertTailList(&CacheSegmentLRUListHead, &CacheSeg->CacheSegmentLRUListEntry);
KeReleaseGuardedMutex(&ViewLock);
CacheSeg->Dirty = TRUE;
KeReleaseSpinLock(&Bcb->BcbLock, oldIrql);
KeReleaseGuardedMutex(&ViewLock);
KeReleaseMutex(&CacheSeg->Mutex, 0);
return(STATUS_SUCCESS);
@ -537,6 +546,9 @@ CcRosUnmapCacheSegment(PBCB Bcb, ULONG FileOffset, BOOLEAN NowDirty)
return(STATUS_UNSUCCESSFUL);
}
KeAcquireGuardedMutex(&ViewLock);
KeAcquireSpinLock(&Bcb->BcbLock, &oldIrql);
WasDirty = CacheSeg->Dirty;
CacheSeg->Dirty = CacheSeg->Dirty || NowDirty;
@ -544,13 +556,10 @@ CcRosUnmapCacheSegment(PBCB Bcb, ULONG FileOffset, BOOLEAN NowDirty)
if (!WasDirty && NowDirty)
{
KeAcquireGuardedMutex(&ViewLock);
InsertTailList(&DirtySegmentListHead, &CacheSeg->DirtySegmentListEntry);
DirtyPageCount += Bcb->CacheSegmentSize / PAGE_SIZE;
KeReleaseGuardedMutex(&ViewLock);
}
KeAcquireSpinLock(&Bcb->BcbLock, &oldIrql);
CcRosCacheSegmentDecRefCount(CacheSeg);
if (!WasDirty && NowDirty)
{
@ -560,8 +569,9 @@ CcRosUnmapCacheSegment(PBCB Bcb, ULONG FileOffset, BOOLEAN NowDirty)
{
CcRosCacheSegmentDecRefCount(CacheSeg);
}
KeReleaseSpinLock(&Bcb->BcbLock, oldIrql);
KeReleaseSpinLock(&Bcb->BcbLock, oldIrql);
KeReleaseGuardedMutex(&ViewLock);
KeReleaseMutex(&CacheSeg->Mutex, 0);
return(STATUS_SUCCESS);
@ -1039,9 +1049,12 @@ CcFlushCache(IN PSECTION_OBJECT_POINTERS SectionObjectPointers,
}
}
KeReleaseMutex(&current->Mutex, 0);
KeAcquireGuardedMutex(&ViewLock);
KeAcquireSpinLock(&Bcb->BcbLock, &oldIrql);
CcRosCacheSegmentDecRefCount(current);
KeReleaseSpinLock(&Bcb->BcbLock, oldIrql);
KeReleaseGuardedMutex(&ViewLock);
}
Offset.QuadPart += Bcb->CacheSegmentSize;