udfs_rec.h

微软win2k的fsrec源码,驱动中展示了如何启动文件系统驱动程序,如何根据硬盘和光盘上的文件系统类型调用不同的文件系统驱动程序

/*++

Copyright (c) 1992  Microsoft Corporation

Module Name:

    udfs_rec.h

Abstract:

    This module contains the mini-file system recognizer for UDFS.

Author:

    Dan Lovinger (danlo) 13-Feb-1997

Environment:

    Kernel mode, local to I/O system

Revision History:


--*/

//
//  NOTE CAREFULLY: the canonical location for this information is in the UDFS
//      driver source.
//

//
//  Aligning this byte offset to a sector boundary by rounding up will
//  yield the starting offset of the Volume Recognition Area (2/8.3)
//

#define VRA_BOUNDARY_LOCATION (32767 + 1)

/***    ISO 13346 Part 2: Volume and Boot Block Recognition
 *
 *
 */


/***    vsd_generic - Generic Volume Structure Descriptor (2/9.1)
 *
 */

typedef struct  VSD_GENERIC {
    UCHAR       Type;                   // Structure Type
    UCHAR       Ident[5];               // Standard Identifier
    UCHAR       Version;                // Standard Version
    UCHAR       Data[2041];             // Structure Data
} VSD_GENERIC, *PVSD_GENERIC;

//  VSD_LENGTH_... - vsd field lengths

#define VSD_LENGTH_IDENT        5       // Length of regid_Identifier (bytes)

//  VSD_IDENT_... - Values for vsd_generic_Ident

#define VSD_IDENT_BEA01     "BEA01"     // Begin Extended Area
#define VSD_IDENT_TEA01     "TEA01"     // Terminate Extended Area
#define VSD_IDENT_CDROM     "CDROM"     // High Sierra Group (pre-ISO 9660)
#define VSD_IDENT_CD001     "CD001"     // ISO 9660
#define VSD_IDENT_CDW01     "CDW01"     // ECMA 168
#define VSD_IDENT_CDW02     "CDW02"     // ISO 13490
#define VSD_IDENT_NSR01     "NSR01"     // ECMA 167
#define VSD_IDENT_NSR02     "NSR02"     // ISO 13346
#define VSD_IDENT_BOOT2     "BOOT2"     // Boot Descriptor

typedef enum _VSD_IDENT {
    VsdIdentBad = 0,
    VsdIdentBEA01,
    VsdIdentTEA01,
    VsdIdentCDROM,
    VsdIdentCD001,
    VsdIdentCDW01,
    VsdIdentCDW02,
    VsdIdentNSR01,
    VsdIdentNSR02,
    VsdIdentBOOT2
} VSD_IDENT, *PVSD_IDENT;

//
//  Following structure is used to build up static data for parse tables
//

typedef struct _PARSE_KEYVALUE {
    PCHAR Key;
    ULONG Value;
} PARSE_KEYVALUE, *PPARSE_KEYVALUE;

//
// Define the functions provided by this driver.
//

BOOLEAN
IsUdfsVolume (
    IN PDEVICE_OBJECT DeviceObject,
    IN ULONG SectorSize
    );

ULONG
UdfsFindInParseTable (
    IN PPARSE_KEYVALUE ParseTable,
    IN PCHAR Id,
    IN ULONG MaxIdLen
    );

#define SectorAlignN(SECTORSIZE, L) (                                           \
    ((((ULONG)(L)) + ((SECTORSIZE) - 1)) & ~((SECTORSIZE) - 1))                 \
)