reactos/ntoskrnl/fsrtl/mcb.c

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/*
* PROJECT: ReactOS Kernel
* LICENSE: GPL - See COPYING in the top level directory
* FILE: ntoskrnl/fsrtl/mcb.c
* PURPOSE: Mapped Control Block (MCB) support for File System Drivers
* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
*/
/* INCLUDES ******************************************************************/
#include <ntoskrnl.h>
#define NDEBUG
#include <debug.h>
/* PUBLIC FUNCTIONS **********************************************************/
/*
* @implemented
*/
BOOLEAN
NTAPI
FsRtlAddMcbEntry(IN PMCB Mcb,
IN VBN Vbn,
IN LBN Lbn,
IN ULONG SectorCount)
{
/* Call the newer function */
return FsRtlAddLargeMcbEntry(&Mcb->
DummyFieldThatSizesThisStructureCorrectly,
(LONGLONG)Vbn,
(LONGLONG)Lbn,
(LONGLONG)SectorCount);
}
/*
* @implemented
*/
BOOLEAN
NTAPI
FsRtlGetNextMcbEntry(IN PMCB Mcb,
IN ULONG RunIndex,
OUT PVBN Vbn,
OUT PLBN Lbn,
OUT PULONG SectorCount)
{
BOOLEAN Return = FALSE;
LONGLONG llVbn;
LONGLONG llLbn;
LONGLONG llSectorCount;
/* Call the Large version */
Return = FsRtlGetNextLargeMcbEntry(
&Mcb->DummyFieldThatSizesThisStructureCorrectly,
RunIndex,
&llVbn,
&llLbn,
&llSectorCount);
/* Return the lower 32 bits */
*Vbn = (ULONG)llVbn;
*Lbn = (ULONG)llLbn;
*SectorCount = (ULONG)llSectorCount;
/* And return the original value */
return Return;
}
/*
* @implemented
*/
VOID
NTAPI
FsRtlInitializeMcb(IN PMCB Mcb,
IN POOL_TYPE PoolType)
{
/* Call the newer function */
FsRtlInitializeLargeMcb(&Mcb->DummyFieldThatSizesThisStructureCorrectly,
PoolType);
}
/*
* @implemented
*/
BOOLEAN
NTAPI
FsRtlLookupLastMcbEntry(IN PMCB Mcb,
OUT PVBN Vbn,
OUT PLBN Lbn)
{
BOOLEAN Return = FALSE;
LONGLONG llVbn = 0;
LONGLONG llLbn = 0;
/* Call the Large version */
Return = FsRtlLookupLastLargeMcbEntry(
&Mcb->DummyFieldThatSizesThisStructureCorrectly,
&llVbn,
&llLbn);
/* Return the lower 32-bits */
*Vbn = (ULONG)llVbn;
*Lbn = (ULONG)llLbn;
/* And return the original value */
return Return;
}
/*
* @implemented
*/
BOOLEAN
NTAPI
FsRtlLookupMcbEntry(IN PMCB Mcb,
IN VBN Vbn,
OUT PLBN Lbn,
OUT PULONG SectorCount OPTIONAL,
OUT PULONG Index)
{
BOOLEAN Return = FALSE;
LONGLONG llLbn;
LONGLONG llSectorCount;
/* Call the Large version */
Return = FsRtlLookupLargeMcbEntry(&Mcb->
DummyFieldThatSizesThisStructureCorrectly,
(LONGLONG)Vbn,
&llLbn,
&llSectorCount,
NULL,
NULL,
Index);
/* Return the lower 32-bits */
*Lbn = (ULONG)llLbn;
if (SectorCount) *SectorCount = (ULONG)llSectorCount;
/* And return the original value */
return Return;
}
/*
* @implemented
*/
ULONG
NTAPI
FsRtlNumberOfRunsInMcb(IN PMCB Mcb)
{
/* Call the newer function */
return FsRtlNumberOfRunsInLargeMcb(
&Mcb->DummyFieldThatSizesThisStructureCorrectly);
}
/*
* @implemented
*/
VOID
NTAPI
FsRtlRemoveMcbEntry(IN PMCB Mcb,
IN VBN Vbn,
IN ULONG SectorCount)
{
/* Call the large function */
FsRtlRemoveLargeMcbEntry(&Mcb->DummyFieldThatSizesThisStructureCorrectly,
(LONGLONG)Vbn,
(LONGLONG)SectorCount);
}
/*
* @implemented
*/
VOID
NTAPI
FsRtlTruncateMcb(IN PMCB Mcb,
IN VBN Vbn)
{
/* Call the newer function */
FsRtlTruncateLargeMcb(&Mcb->DummyFieldThatSizesThisStructureCorrectly,
(LONGLONG)Vbn);
}
/*
* @implemented
*/
VOID
NTAPI
FsRtlUninitializeMcb(IN PMCB Mcb)
{
/* Call the newer function */
FsRtlUninitializeLargeMcb(&Mcb->DummyFieldThatSizesThisStructureCorrectly);
}