reactos/drivers/filesystems/fs_rec/fs_rec.h

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/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS File System Recognizer
* FILE: drivers/filesystems/fs_rec/fs_rec.h
* PURPOSE: Main Header File
* PROGRAMMER: Alex Ionescu (alex.ionescu@reactos.org)
* Eric Kohl
*/
#ifndef _FS_REC_H
#define _FS_REC_H
#include <ntifs.h>
/* Tag for memory allocations */
#define FSREC_TAG 'cRsF'
/* UDFS Offsets */
#define UDFS_VRS_START_OFFSET 32768
#define UDFS_AVDP_SECTOR 256
/* Non-standard rounding macros */
#ifndef ROUND_UP
#define ROUND_UP(n, align) \
ROUND_DOWN(((ULONG)n) + (align) - 1, (align))
#define ROUND_DOWN(n, align) \
(((ULONG)n) & ~((align) - 1l))
#endif
/* Conversion types and macros taken from internal ntifs headers */
typedef union _UCHAR1
{
UCHAR Uchar[1];
UCHAR ForceAlignment;
} UCHAR1, *PUCHAR1;
typedef union _UCHAR2
{
UCHAR Uchar[2];
USHORT ForceAlignment;
} UCHAR2, *PUCHAR2;
typedef union _UCHAR4
{
UCHAR Uchar[4];
ULONG ForceAlignment;
} UCHAR4, *PUCHAR4;
#define CopyUchar1(Dst,Src) { \
*((UCHAR1 *)(Dst)) = *((UNALIGNED UCHAR1 *)(Src)); \
}
#define CopyUchar2(Dst,Src) { \
*((UCHAR2 *)(Dst)) = *((UNALIGNED UCHAR2 *)(Src)); \
}
#define CopyUchar4(Dst,Src) { \
*((UCHAR4 *)(Dst)) = *((UNALIGNED UCHAR4 *)(Src)); \
}
#define FatUnpackBios(Bios,Pbios) { \
CopyUchar2(&(Bios)->BytesPerSector, &(Pbios)->BytesPerSector[0] ); \
CopyUchar1(&(Bios)->SectorsPerCluster, &(Pbios)->SectorsPerCluster[0]); \
CopyUchar2(&(Bios)->ReservedSectors, &(Pbios)->ReservedSectors[0] ); \
CopyUchar1(&(Bios)->Fats, &(Pbios)->Fats[0] ); \
CopyUchar2(&(Bios)->RootEntries, &(Pbios)->RootEntries[0] ); \
CopyUchar2(&(Bios)->Sectors, &(Pbios)->Sectors[0] ); \
CopyUchar1(&(Bios)->Media, &(Pbios)->Media[0] ); \
CopyUchar2(&(Bios)->SectorsPerFat, &(Pbios)->SectorsPerFat[0] ); \
CopyUchar2(&(Bios)->SectorsPerTrack, &(Pbios)->SectorsPerTrack[0] ); \
CopyUchar2(&(Bios)->Heads, &(Pbios)->Heads[0] ); \
CopyUchar4(&(Bios)->HiddenSectors, &(Pbios)->HiddenSectors[0] ); \
CopyUchar4(&(Bios)->LargeSectors, &(Pbios)->LargeSectors[0] ); \
}
/* Packed versions of the BPB and Boot Sector */
typedef struct _PACKED_BIOS_PARAMETER_BLOCK
{
UCHAR BytesPerSector[2];
UCHAR SectorsPerCluster[1];
UCHAR ReservedSectors[2];
UCHAR Fats[1];
UCHAR RootEntries[2];
UCHAR Sectors[2];
UCHAR Media[1];
UCHAR SectorsPerFat[2];
UCHAR SectorsPerTrack[2];
UCHAR Heads[2];
UCHAR HiddenSectors[4];
UCHAR LargeSectors[4];
} PACKED_BIOS_PARAMETER_BLOCK, *PPACKED_BIOS_PARAMETER_BLOCK;
typedef struct _PACKED_BOOT_SECTOR
{
UCHAR Jump[3];
UCHAR Oem[8];
PACKED_BIOS_PARAMETER_BLOCK PackedBpb;
UCHAR PhysicalDriveNumber;
UCHAR CurrentHead;
UCHAR Signature;
UCHAR Id[4];
UCHAR VolumeLabel[11];
UCHAR SystemId[8];
} PACKED_BOOT_SECTOR, *PPACKED_BOOT_SECTOR;
/* Unpacked version of the BPB */
typedef struct BIOS_PARAMETER_BLOCK
{
USHORT BytesPerSector;
UCHAR SectorsPerCluster;
USHORT ReservedSectors;
UCHAR Fats;
USHORT RootEntries;
USHORT Sectors;
UCHAR Media;
USHORT SectorsPerFat;
USHORT SectorsPerTrack;
USHORT Heads;
ULONG32 HiddenSectors;
ULONG32 LargeSectors;
ULONG32 LargeSectorsPerFat;
union
{
USHORT ExtendedFlags;
struct
{
ULONG ActiveFat:4;
ULONG Reserved0:3;
ULONG MirrorDisabled:1;
ULONG Reserved1:8;
};
};
USHORT FsVersion;
ULONG32 RootDirFirstCluster;
USHORT FsInfoSector;
USHORT BackupBootSector;
} BIOS_PARAMETER_BLOCK, *PBIOS_PARAMETER_BLOCK;
/* UDFS Structures */
#include <pshpack1.h>
typedef struct _TAG
{
USHORT Identifier;
USHORT Version;
UCHAR Checksum;
UCHAR Reserved;
USHORT SerialNumber;
USHORT Crc;
USHORT CrcLength;
ULONG Location;
} TAG, *PTAG;
typedef struct _EXTENT
{
ULONG Length;
ULONG Location;
} EXTENT, *PEXTENT;
typedef struct _AVDP
{
TAG DescriptorTag;
EXTENT MainVolumeDescriptorExtent;
EXTENT ReserveVolumeDescriptorExtent;
} AVDP, *PAVDP;
#include <poppack.h>
/* Filesystem Types */
typedef enum _FILE_SYSTEM_TYPE
{
FS_TYPE_UNUSED,
FS_TYPE_VFAT,
FS_TYPE_NTFS,
FS_TYPE_CDFS,
FS_TYPE_UDFS,
FS_TYPE_EXT2,
FS_TYPE_BTRFS,
FS_TYPE_REISERFS,
FS_TYPE_FFS,
} FILE_SYSTEM_TYPE, *PFILE_SYSTEM_TYPE;
/* FS Recognizer State */
typedef enum _FS_REC_STATE
{
Pending,
Loaded,
Unloading
} FS_REC_STATE, *PFS_REC_STATE;
/* Device extension */
typedef struct _DEVICE_EXTENSION
{
FS_REC_STATE State;
FILE_SYSTEM_TYPE FsType;
PDEVICE_OBJECT Alternate;
} DEVICE_EXTENSION, *PDEVICE_EXTENSION;
/* Prototypes */
NTSTATUS
NTAPI
FsRecCdfsFsControl(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
);
NTSTATUS
NTAPI
FsRecVfatFsControl(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
);
NTSTATUS
NTAPI
FsRecNtfsFsControl(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
);
NTSTATUS
NTAPI
FsRecUdfsFsControl(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
);
NTSTATUS
NTAPI
FsRecExt2FsControl(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
);
NTSTATUS
NTAPI
FsRecBtrfsFsControl(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
);
NTSTATUS
NTAPI
FsRecReiserfsFsControl(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
);
NTSTATUS
NTAPI
FsRecFfsFsControl(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
);
BOOLEAN
NTAPI
FsRecGetDeviceSectors(
IN PDEVICE_OBJECT DeviceObject,
IN ULONG SectorSize,
OUT PLARGE_INTEGER SectorCount
);
BOOLEAN
NTAPI
FsRecGetDeviceSectorSize(
IN PDEVICE_OBJECT DeviceObject,
OUT PULONG SectorSize
);
BOOLEAN
NTAPI
FsRecReadBlock(
IN PDEVICE_OBJECT DeviceObject,
IN PLARGE_INTEGER Offset,
IN ULONG Length,
IN ULONG SectorSize,
IN OUT PVOID *Buffer,
OUT PBOOLEAN DeviceError OPTIONAL
);
NTSTATUS
NTAPI
FsRecLoadFileSystem(
IN PDEVICE_OBJECT DeviceObject,
IN PWCHAR DriverServiceName
);
#endif /* _FS_REC_H */