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