ext2fs.h

可以在不启动LINUX的情况下直接访问EXT2和EXT3格式的磁盘

    PIRP        Irp;
    struct _EXT2_EXTENT * Next;
} EXT2_EXTENT, *PEXT2_EXTENT;

/* FUNCTIONS DECLARATION *****************************************************/

//
//  The following macro is used to determine if an FSD thread can block
//  for I/O or wait for a resource.  It returns TRUE if the thread can
//  block and FALSE otherwise.  This attribute can then be used to call
//  the FSD & FSP common work routine with the proper wait value.
//

#define CanExt2Wait(IRP) IoIsOperationSynchronous(Irp)


//
// memory allocation statistics
//

__inline
VOID
Ext2TraceMemory(BOOLEAN _n, int _i, PVOID _p, LONG _s)
{
    if (_n) {
        InterlockedIncrement(&Ext2Global->PerfStat.Current.Slot[_i]);
        InterlockedIncrement(&Ext2Global->PerfStat.Total.Slot[_i]);
        InterlockedExchangeAdd(&Ext2Global->PerfStat.Size.Slot[_i], _s);
    } else {
        InterlockedDecrement(&Ext2Global->PerfStat.Current.Slot[_i]);
        InterlockedExchangeAdd(&Ext2Global->PerfStat.Size.Slot[_i], -1 * _s);
    }
}

__inline
VOID
Ext2TraceIrpContext(BOOLEAN _n, PEXT2_IRP_CONTEXT IrpContext)
{
    if (_n) {
        INC_MEM_COUNT(PS_IRP_CONTEXT, IrpContext, sizeof(EXT2_IRP_CONTEXT));
        InterlockedIncrement(&(Ext2Global->PerfStat.Irps[IrpContext->MajorFunction].Current));
    } else {
        DEC_MEM_COUNT(PS_IRP_CONTEXT, IrpContext, sizeof(EXT2_IRP_CONTEXT));
        InterlockedIncrement(&Ext2Global->PerfStat.Irps[IrpContext->MajorFunction].Processed);
        InterlockedDecrement(&Ext2Global->PerfStat.Irps[IrpContext->MajorFunction].Current);
    }
}

//
// Block.c
//

NTSTATUS
Ext2LockUserBuffer (
        IN PIRP             Irp,
        IN ULONG            Length,
        IN LOCK_OPERATION   Operation);
PVOID
Ext2GetUserBuffer (IN PIRP Irp);


NTSTATUS
Ext2ReadWriteBlocks(
        IN PEXT2_IRP_CONTEXT IrpContext,
        IN PEXT2_VCB        Vcb,
        IN PEXT2_EXTENT     Extent,
        IN ULONG            Length,
        IN BOOLEAN          bVerify );

NTSTATUS
Ext2ReadSync(
        IN PEXT2_VCB        Vcb,
        IN ULONGLONG        Offset,
        IN ULONG            Length,
        OUT PVOID           Buffer,
        IN BOOLEAN          bVerify );

NTSTATUS
Ext2ReadDisk(
         IN PEXT2_VCB       Vcb,
         IN ULONGLONG       Offset,
         IN ULONG           Size,
         IN PVOID           Buffer,
         IN BOOLEAN         bVerify  );

NTSTATUS 
Ext2DiskIoControl (
        IN PDEVICE_OBJECT   DeviceOjbect,
        IN ULONG            IoctlCode,
        IN PVOID            InputBuffer,
        IN ULONG            InputBufferSize,
        IN OUT PVOID        OutputBuffer,
        IN OUT PULONG       OutputBufferSize );

VOID
Ext2MediaEjectControl (
        IN PEXT2_IRP_CONTEXT IrpContext,
        IN PEXT2_VCB Vcb,
        IN BOOLEAN bPrevent );

NTSTATUS
Ext2DiskShutDown(PEXT2_VCB Vcb);


//
// Cleanup.c
//

NTSTATUS
Ext2Cleanup (IN PEXT2_IRP_CONTEXT IrpContext);

//
// Close.c
//

NTSTATUS
Ext2Close (IN PEXT2_IRP_CONTEXT IrpContext);

VOID
Ext2QueueCloseRequest (IN PEXT2_IRP_CONTEXT IrpContext);

VOID
Ext2DeQueueCloseRequest (IN PVOID Context);

//
// Cmcb.c
//

BOOLEAN
Ext2AcquireForLazyWrite (
        IN PVOID    Context,
        IN BOOLEAN  Wait );
VOID
Ext2ReleaseFromLazyWrite (IN PVOID Context);

BOOLEAN
Ext2AcquireForReadAhead (
        IN PVOID    Context,
        IN BOOLEAN  Wait );

VOID
Ext2ReleaseFromReadAhead (IN PVOID Context);

BOOLEAN
Ext2NoOpAcquire (
        IN PVOID Fcb,
        IN BOOLEAN Wait );

VOID
Ext2NoOpRelease (IN PVOID Fcb    );


//
// Create.c
//


BOOLEAN
Ext2IsNameValid(PUNICODE_STRING FileName);

NTSTATUS
Ext2FollowLink (
    IN PEXT2_IRP_CONTEXT    IrpContext,
    IN PEXT2_VCB            Vcb,
    IN PEXT2_MCB            Parent,
    IN PEXT2_MCB            Mcb,
    IN USHORT               Linkdep
    );

NTSTATUS
Ext2ScanDir (
    IN PEXT2_IRP_CONTEXT    IrpContext,
    IN PEXT2_VCB            Vcb,
    IN PEXT2_MCB            Parent,
    IN PUNICODE_STRING      FileName,
    IN OUT PULONG           Index,
    IN OUT PULONG           Inode
    );

BOOLEAN
Ext2IsSpecialSystemFile(
    IN PUNICODE_STRING FileName,
    IN BOOLEAN         bDirectory
    );

NTSTATUS
Ext2LookupFile (
    IN PEXT2_IRP_CONTEXT    IrpContext,
    IN PEXT2_VCB            Vcb,
    IN PUNICODE_STRING      FullName,
    IN PEXT2_MCB            Parent,
    OUT PEXT2_MCB *         Ext2Mcb,
    IN USHORT               Linkdep
    );

NTSTATUS
Ext2CreateFile(
    IN PEXT2_IRP_CONTEXT IrpContext,
    IN PEXT2_VCB Vcb,
    OUT PBOOLEAN OpPostIrp
    );

NTSTATUS
Ext2CreateVolume(
        IN PEXT2_IRP_CONTEXT IrpContext, 
        IN PEXT2_VCB Vcb );

NTSTATUS
Ext2Create (IN PEXT2_IRP_CONTEXT IrpContext);

NTSTATUS
Ext2CreateInode(
        IN PEXT2_IRP_CONTEXT   IrpContext,
        IN PEXT2_VCB           Vcb,
        IN PEXT2_FCB           pParentFcb,
        IN ULONG               Type,
        IN ULONG               FileAttr,
        IN PUNICODE_STRING     FileName);


NTSTATUS
Ext2SupersedeOrOverWriteFile(
        IN PEXT2_IRP_CONTEXT IrpContext,
        IN PFILE_OBJECT      FileObject,
        IN PEXT2_VCB         Vcb,
        IN PEXT2_FCB         Fcb,
        IN PLARGE_INTEGER    AllocationSize,
        IN ULONG             Disposition
    );

//
// Debug.c
//

/* debug levels */
#define DL_VIT 0
#define DL_ERR 1
#define DL_USR 2
#define DL_DBG 3
#define DL_INF 4
#define DL_FUN 5
#define DL_LOW 6


#define DL_DEFAULT DL_USR
#define DL_REN     DL_ERR       /* renaming operation */
#define DL_RES     DL_DBG       /* entry reference managment */
#define DL_BLK     DL_LOW       /* data block allocation / free */
#define DL_CP      DL_LOW       /* code pages (create, querydir) */
#define DL_EXT     DL_LOW + 1   /* extents */
#define DL_MAP     DL_EXT       /* retrieval points */
#define DL_JNL     DL_USR       /* dump journal operations */

#if EXT2_DEBUG
extern  ULONG DebugLevel;

VOID
__cdecl
Ext2NiPrintf(
    PCHAR DebugMessage,
    ...
    );

#define DEBUG(_DL, arg)    do {if (_DL <= DebugLevel) Ext2Printf arg;} while(0)
#define DEBUGNI(_DL, arg)  do {if (_DL <= DebugLevel) Ext2NiPrintf arg;} while(0)

#define Ext2CompleteRequest(Irp, bPrint, PriorityBoost) \
        Ext2DbgPrintComplete(Irp, bPrint); \
        IoCompleteRequest(Irp, PriorityBoost)

#else

#define DEBUG(_DL, arg) do {if (_DL <= DL_ERR) DbgPrint arg;} while(0)

#define Ext2CompleteRequest(Irp, bPrint, PriorityBoost) \
        IoCompleteRequest(Irp, PriorityBoost)

#endif // EXT2_DEBUG

VOID
__cdecl
Ext2Printf(
    PCHAR DebugMessage,
    ...
    );

extern ULONG ProcessNameOffset;

#define Ext2GetCurrentProcessName() ( \
    (PUCHAR) PsGetCurrentProcess() + ProcessNameOffset \
)

ULONG 
Ext2GetProcessNameOffset (VOID);

VOID
Ext2DbgPrintCall (
        IN PDEVICE_OBJECT   DeviceObject,
        IN PIRP             Irp );

VOID
Ext2DbgPrintComplete (
        IN PIRP Irp,
        IN BOOLEAN bPrint
        );

PUCHAR
Ext2NtStatusToString (IN NTSTATUS Status );

//
// Devctl.c
//

NTSTATUS
Ext2ProcessGlobalProperty(
    IN  PDEVICE_OBJECT  DeviceObject,
    IN  PEXT2_VOLUME_PROPERTY2 Property
    );

NTSTATUS
Ext2ProcessVolumeProperty(
    IN  PEXT2_VCB              Vcb,
    IN  PEXT2_VOLUME_PROPERTY2 Property
    );

NTSTATUS
Ext2ProcessUserProperty(
    IN PEXT2_IRP_CONTEXT        IrpContext,
    IN PEXT2_VOLUME_PROPERTY2   Property,
    IN ULONG                    Length
    );

NTSTATUS
Ex2ProcessUserPerfStat(
    IN PEXT2_IRP_CONTEXT        IrpContext,
    IN PEXT2_QUERY_PERFSTAT     QueryPerf,
    IN ULONG                    Length
    );

NTSTATUS
Ex2ProcessMountPoint(
    IN PEXT2_IRP_CONTEXT        IrpContext,
    IN PEXT2_MOUNT_POINT        MountPoint,
    IN ULONG                    Length
    );

NTSTATUS
Ext2DeviceControlNormal (IN PEXT2_IRP_CONTEXT IrpContext);

NTSTATUS
Ext2PrepareToUnload (IN PEXT2_IRP_CONTEXT IrpContext);

NTSTATUS
Ext2DeviceControl (IN PEXT2_IRP_CONTEXT IrpContext);

//
// Dirctl.c
//

ULONG
Ext2GetInfoLength(IN FILE_INFORMATION_CLASS  FileInformationClass);

NTSTATUS
Ext2ProcessDirEntry(
    IN PEXT2_IRP_CONTEXT    IrpContext,
    IN PEXT2_VCB            Vcb,
    IN PEXT2_FCB            Dcb,
    IN FILE_INFORMATION_CLASS  FileInformationClass,
    IN ULONG                in,
    IN PVOID                Buffer,
    IN ULONG                UsedLength,
    IN ULONG                Length,
    IN ULONG                FileIndex,
    IN PUNICODE_STRING      pName,
    OUT PULONG              EntrySize,
    IN BOOLEAN              Single
    );

BOOLEAN
Ext2IsWearingCloak(
    IN  PEXT2_VCB       Vcb,
    IN  POEM_STRING     OeName
    );

NTSTATUS
Ext2QueryDirectory (IN PEXT2_IRP_CONTEXT IrpContext);

NTSTATUS
Ext2NotifyChangeDirectory (
        IN PEXT2_IRP_CONTEXT IrpContext
        );

VOID
Ext2NotifyReportChange (
    IN PEXT2_IRP_CONTEXT IrpContext,
    IN PEXT2_VCB         Vcb,
    IN PEXT2_MCB         Mcb,
    IN ULONG             Filter,
    IN ULONG             Action
    );

NTSTATUS
Ext2DirectoryControl (IN PEXT2_IRP_CONTEXT IrpContext);

BOOLEAN
Ext2IsDirectoryEmpty (
    IN PEXT2_IRP_CONTEXT IrpContext,
    IN PEXT2_VCB Vcb,
    IN PEXT2_MCB Mcb
    );

//
// Dispatch.c
//

VOID
Ext2OplockComplete (
    IN PVOID Context,
    IN PIRP Irp
    );

VOID
Ext2LockIrp (
    IN PVOID Context,
    IN PIRP Irp
    );

NTSTATUS
Ext2QueueRequest (IN PEXT2_IRP_CONTEXT IrpContext);

VOID
Ext2DeQueueRequest (IN PVOID Context);

NTSTATUS
Ext2DispatchRequest (IN PEXT2_IRP_CONTEXT IrpContext);

NTSTATUS
Ext2BuildRequest (
        IN PDEVICE_OBJECT   DeviceObject,
        IN PIRP             Irp
        );

//
// Except.c
//

NTSTATUS
Ext2ExceptionFilter (
        IN PEXT2_IRP_CONTEXT    IrpContext,
        IN PEXCEPTION_POINTERS ExceptionPointer
        );

NTSTATUS
Ext2ExceptionHandler (IN PEXT2_IRP_CONTEXT IrpContext);


//
// ext3\generic.c
//

NTSTATUS
Ext2LoadSuper(
    IN PEXT2_VCB      Vcb,
    IN BOOLEAN        bVerify,
    OUT PEXT2_SUPER_BLOCK * Sb
    );


BOOLEAN
Ext2SaveSuper(
    IN PEXT2_IRP_CONTEXT    IrpContext,
    IN PEXT2_VCB            Vcb
    );

BOOLEAN
Ext2RefreshSuper(
    IN PEXT2_IRP_CONTEXT    IrpContext,
    IN PEXT2_VCB            Vcb
    );

BOOLEAN
Ext2LoadGroup(IN PEXT2_VCB Vcb);

BOOLEAN
Ext2SaveGroup(
    IN PEXT2_IRP_CONTEXT    IrpContext,
    IN PEXT2_VCB            Vcb,
    IN ULONG                Group
        );

BOOLEAN
Ext2RefreshGroup(
    IN PEXT2_IRP_CONTEXT    IrpContext,
    IN PEXT2_VCB            Vcb
    );

BOOLEAN
Ext2GetInodeLba (
        IN PEXT2_VCB Vcb,