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[NTOS:CC]

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- Implement CcPurgeCacheSection
CORE-12893

svn path=/trunk/; revision=74355
This commit is contained in:
Thomas Faber 2017-04-17 17:29:10 +00:00
parent 880f06c728
commit 73e2aff9c5
1 changed files with 73 additions and 1 deletions
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74
reactos/ntoskrnl/cc/fs.c
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@ -135,10 +135,82 @@ CcPurgeCacheSection (
IN ULONG Length,
IN BOOLEAN UninitializeCacheMaps)
{
PROS_SHARED_CACHE_MAP SharedCacheMap;
LONGLONG StartOffset;
LONGLONG EndOffset;
LIST_ENTRY FreeList;
KIRQL OldIrql;
PLIST_ENTRY ListEntry;
PROS_VACB Vacb;
LONGLONG ViewEnd;
CCTRACE(CC_API_DEBUG, "SectionObjectPointer=%p\n FileOffset=%p Length=%lu UninitializeCacheMaps=%d",
SectionObjectPointer, FileOffset, Length, UninitializeCacheMaps);
//UNIMPLEMENTED;
if (UninitializeCacheMaps)
{
DPRINT1("FIXME: CcPurgeCacheSection not uninitializing private cache maps\n");
}
SharedCacheMap = SectionObjectPointer->SharedCacheMap;
StartOffset = FileOffset != NULL ? FileOffset->QuadPart : 0;
if (Length == 0 || FileOffset == NULL)
{
EndOffset = MAXLONGLONG;
}
else
{
EndOffset = StartOffset + Length;
ASSERT(EndOffset > StartOffset);
}
InitializeListHead(&FreeList);
KeAcquireGuardedMutex(&ViewLock);
KeAcquireSpinLock(&SharedCacheMap->CacheMapLock, &OldIrql);
ListEntry = SharedCacheMap->CacheMapVacbListHead.Flink;
while (ListEntry != &SharedCacheMap->CacheMapVacbListHead)
{
Vacb = CONTAINING_RECORD(ListEntry, ROS_VACB, CacheMapVacbListEntry);
ListEntry = ListEntry->Flink;
/* Skip VACBs outside the range, or only partially in range */
if (Vacb->FileOffset.QuadPart < StartOffset)
{
continue;
}
ViewEnd = min(Vacb->FileOffset.QuadPart + VACB_MAPPING_GRANULARITY,
SharedCacheMap->SectionSize.QuadPart);
if (ViewEnd >= EndOffset)
{
break;
}
ASSERT((Vacb->ReferenceCount == 0) ||
(Vacb->ReferenceCount == 1 && Vacb->Dirty));
/* This VACB is in range, so unlink it and mark for free */
RemoveEntryList(&Vacb->VacbLruListEntry);
if (Vacb->Dirty)
{
RemoveEntryList(&Vacb->DirtyVacbListEntry);
DirtyPageCount -= VACB_MAPPING_GRANULARITY / PAGE_SIZE;
}
RemoveEntryList(&Vacb->CacheMapVacbListEntry);
InsertHeadList(&FreeList, &Vacb->CacheMapVacbListEntry);
}
KeReleaseSpinLock(&SharedCacheMap->CacheMapLock, OldIrql);
KeReleaseGuardedMutex(&ViewLock);
while (!IsListEmpty(&FreeList))
{
Vacb = CONTAINING_RECORD(RemoveHeadList(&FreeList),
ROS_VACB,
CacheMapVacbListEntry);
CcRosInternalFreeVacb(Vacb);
}
return FALSE;
}