-/* $Id: pin.c,v 1.14 2003/12/30 18:52:03 fireball Exp $
+/* $Id$
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
* FILE: ntoskrnl/cc/pin.c
* PURPOSE: Implements cache managers pinning interface
- * PROGRAMMER: Hartmut Birr
- * UPDATE HISTORY:
- * Created 05.10.2001
+ *
+ * PROGRAMMERS: Hartmut Birr
*/
/* INCLUDES ******************************************************************/
-#include <ddk/ntddk.h>
-#include <ddk/ntifs.h>
-#include <internal/mm.h>
-#include <internal/cc.h>
-#include <internal/pool.h>
-#include <internal/io.h>
-#include <ntos/minmax.h>
-
+#include <ntoskrnl.h>
#define NDEBUG
#include <internal/debug.h>
/* GLOBALS *******************************************************************/
-#define ROUND_DOWN(N, S) ((N) - ((N) % (S)))
-
extern NPAGED_LOOKASIDE_LIST iBcbLookasideList;
/* FUNCTIONS *****************************************************************/
NTSTATUS Status;
PINTERNAL_BCB iBcb;
ULONG ROffset;
-
- DPRINT("CcMapData(FileObject %x, FileOffset %d, Length %d, Wait %d,"
- " pBcb %x, pBuffer %x)\n", FileObject, (ULONG)FileOffset->QuadPart,
+
+ DPRINT("CcMapData(FileObject 0x%p, FileOffset %I64x, Length %d, Wait %d,"
+ " pBcb 0x%p, pBuffer 0x%p)\n", FileObject, FileOffset->QuadPart,
Length, Wait, pBcb, pBuffer);
-
+
ReadOffset = (ULONG)FileOffset->QuadPart;
Bcb = FileObject->SectionObjectPointer->SharedCacheMap;
- assert(Bcb);
+ ASSERT(Bcb);
+
+ DPRINT("AllocationSize %I64x, FileSize %I64x\n",
+ Bcb->AllocationSize.QuadPart,
+ Bcb->FileSize.QuadPart);
- DPRINT("AllocationSize %d, FileSize %d\n",
- (ULONG)Bcb->AllocationSize.QuadPart,
- (ULONG)Bcb->FileSize.QuadPart);
-
if (ReadOffset % Bcb->CacheSegmentSize + Length > Bcb->CacheSegmentSize)
{
return(FALSE);
return(FALSE);
}
}
-#if defined(__GNUC__)
- *pBuffer += ReadOffset % Bcb->CacheSegmentSize;
-#else
- {
- char* pTemp = *pBuffer;
- pTemp += ReadOffset % Bcb->CacheSegmentSize;
- *pBuffer = pTemp;
- }
-#endif
+
+ *pBuffer = (PVOID)((ULONG_PTR)(*pBuffer) + (ReadOffset % Bcb->CacheSegmentSize));
iBcb = ExAllocateFromNPagedLookasideList(&iBcbLookasideList);
if (iBcb == NULL)
{
return FALSE;
}
memset(iBcb, 0, sizeof(INTERNAL_BCB));
+ iBcb->PFCB.NodeTypeCode = 0xDE45; /* Undocumented (CAPTIVE_PUBLIC_BCB_NODETYPECODE) */
+ iBcb->PFCB.NodeByteSize = sizeof(PUBLIC_BCB);
+ iBcb->PFCB.MappedLength = Length;
+ iBcb->PFCB.MappedFileOffset = *FileOffset;
iBcb->CacheSegment = CacheSeg;
iBcb->Dirty = FALSE;
- iBcb->PFCB.MappedLength = Length;
- iBcb->PFCB.MappedFileOffset.QuadPart = FileOffset->QuadPart;
+ iBcb->RefCount = 1;
*pBcb = (PVOID)iBcb;
return(TRUE);
}
/*
- * @implemented
+ * @unimplemented
*/
-VOID STDCALL
-CcUnpinData (IN PVOID Bcb)
+BOOLEAN
+STDCALL
+CcPinMappedData (
+ IN PFILE_OBJECT FileObject,
+ IN PLARGE_INTEGER FileOffset,
+ IN ULONG Length,
+ IN ULONG Flags,
+ OUT PVOID * Bcb
+ )
{
- PINTERNAL_BCB iBcb = Bcb;
- CcRosReleaseCacheSegment(iBcb->CacheSegment->Bcb, iBcb->CacheSegment, TRUE,
- iBcb->Dirty, FALSE);
- ExFreeToNPagedLookasideList(&iBcbLookasideList, iBcb);
+ /* no-op for current implementation. */
+ return TRUE;
+}
+
+/*
+ * @unimplemented
+ */
+BOOLEAN
+STDCALL
+CcPinRead (
+ IN PFILE_OBJECT FileObject,
+ IN PLARGE_INTEGER FileOffset,
+ IN ULONG Length,
+ IN ULONG Flags,
+ OUT PVOID * Bcb,
+ OUT PVOID * Buffer
+ )
+{
+ if (CcMapData(FileObject, FileOffset, Length, Flags, Bcb, Buffer))
+ {
+ if (CcPinMappedData(FileObject, FileOffset, Length, Flags, Bcb))
+ return TRUE;
+ else
+ CcUnpinData(Bcb);
+ }
+ return FALSE;
+}
+
+/*
+ * @unimplemented
+ */
+BOOLEAN
+STDCALL
+CcPreparePinWrite (
+ IN PFILE_OBJECT FileObject,
+ IN PLARGE_INTEGER FileOffset,
+ IN ULONG Length,
+ IN BOOLEAN Zero,
+ IN ULONG Flags,
+ OUT PVOID * Bcb,
+ OUT PVOID * Buffer
+ )
+{
+ /*
+ * FIXME: This is function is similar to CcPinRead, but doesn't
+ * read the data if they're not present. Instead it should just
+ * prepare the cache segments and zero them out if Zero == TRUE.
+ *
+ * For now calling CcPinRead is better than returning error or
+ * just having UNIMPLEMENTED here.
+ */
+ return CcPinRead(FileObject, FileOffset, Length, Flags, Bcb, Buffer);
}
/*
iBcb->Dirty = TRUE;
}
+
+/*
+ * @implemented
+ */
+VOID STDCALL
+CcUnpinData (IN PVOID Bcb)
+{
+ PINTERNAL_BCB iBcb = Bcb;
+ CcRosReleaseCacheSegment(iBcb->CacheSegment->Bcb, iBcb->CacheSegment, TRUE,
+ iBcb->Dirty, FALSE);
+ if (--iBcb->RefCount == 0)
+ {
+ ExFreeToNPagedLookasideList(&iBcbLookasideList, iBcb);
+ }
+}
+
+/*
+ * @unimplemented
+ */
+VOID
+STDCALL
+CcUnpinDataForThread (
+ IN PVOID Bcb,
+ IN ERESOURCE_THREAD ResourceThreadId
+ )
+{
+ UNIMPLEMENTED;
+}
+
+/*
+ * @implemented
+ */
+VOID
+STDCALL
+CcRepinBcb (
+ IN PVOID Bcb
+ )
+{
+ PINTERNAL_BCB iBcb = Bcb;
+ iBcb->RefCount++;
+}
+
+/*
+ * @unimplemented
+ */
+VOID
+STDCALL
+CcUnpinRepinnedBcb (
+ IN PVOID Bcb,
+ IN BOOLEAN WriteThrough,
+ IN PIO_STATUS_BLOCK IoStatus
+ )
+{
+ PINTERNAL_BCB iBcb = Bcb;
+
+ if (--iBcb->RefCount == 0)
+ {
+ IoStatus->Information = 0;
+ if (WriteThrough)
+ {
+ ExEnterCriticalRegionAndAcquireFastMutexUnsafe(&iBcb->CacheSegment->Lock);
+ if (iBcb->CacheSegment->Dirty)
+ {
+ IoStatus->Status = CcRosFlushCacheSegment(iBcb->CacheSegment);
+ }
+ else
+ {
+ IoStatus->Status = STATUS_SUCCESS;
+ }
+ ExReleaseFastMutexUnsafeAndLeaveCriticalRegion(&iBcb->CacheSegment->Lock);
+ }
+ else
+ {
+ IoStatus->Status = STATUS_SUCCESS;
+ }
+
+ ExFreeToNPagedLookasideList(&iBcbLookasideList, iBcb);
+ }
+}
projects / reactos.git / blobdiff