ramdisk.h

来自「RAM Disk Driver with custom BoundsChecke」· C头文件 代码 · 共 166 行

/*++

Copyright (c) 1993  Microsoft Corporation

Module Name:

    ramdisk.h

Abstract:

    This file includes data declarations for the Ram Disk driver for NT.

Author:

    Robert Nelson (RobertN) 10-Mar-1993.

Environment:

    Kernel mode only.

Notes:

Revision History:

--*/


#define	DEFAULT_DISK_SIZE           (1024*1024)     // 1 MB
#define	DEFAULT_ROOT_DIR_ENTRIES    512
#define	DEFAULT_SECTORS_PER_CLUSTER 2

typedef struct  _RAM_DISK_EXTENSION {
    PDEVICE_OBJECT  DeviceObject;
    PUCHAR          DiskImage;
    ULONG           DiskLength;
    ULONG           NumberOfCylinders;
    ULONG           TracksPerCylinder;
    ULONG           SectorsPerTrack;
    ULONG           BytesPerSector;
    UNICODE_STRING  Win32NameString;
}   RAMDISK_EXTENSION, *PRAMDISK_EXTENSION;

#define RAMDISK_MEDIA_TYPE      0xF8
#define DIR_ENTRIES_PER_SECTOR  16
#define WIN32_PATH              L"\\DosDevices\\"

#if DBG
#define RAMDBUGCHECK            ((ULONG)0x80000000)
#define RAMDDIAG1               ((ULONG)0x00000001)
#define RAMDDIAG2               ((ULONG)0x00000002)
#define RAMDERRORS              ((ULONG)0x00000004)

#define RamDiskDump(LEVEL, STRING) \
        do { \
            if (RamDiskDebugLevel & LEVEL) { \
                DbgPrint STRING; \
            } \
            if (LEVEL == RAMDBUGCHECK) { \
                ASSERT(FALSE); \
            } \
        } while (0)
#else
#define RamDiskDump(LEVEL,STRING) do {NOTHING;} while (0)
#endif

#pragma pack(1)

typedef struct  _BOOT_SECTOR
{
    UCHAR       bsJump[3];          // x86 jmp instruction, checked by FS
    CCHAR       bsOemName[8];       // OEM name of formatter
    USHORT      bsBytesPerSec;      // Bytes per Sector
    UCHAR       bsSecPerClus;       // Sectors per Cluster
    USHORT      bsResSectors;       // Reserved Sectors
    UCHAR       bsFATs;             // Number of FATs - we always use 1
    USHORT      bsRootDirEnts;      // Number of Root Dir Entries
    USHORT      bsSectors;          // Number of Sectors
    UCHAR       bsMedia;            // Media type - we use RAMDISK_MEDIA_TYPE
    USHORT      bsFATsecs;          // Number of FAT sectors
    USHORT      bsSecPerTrack;      // Sectors per Track - we use 32
    USHORT      bsHeads;            // Number of Heads - we use 2
    ULONG       bsHiddenSecs;       // Hidden Sectors - we set to 0
    ULONG       bsHugeSectors;      // Number of Sectors if > 32 MB size
    UCHAR       bsDriveNumber;      // Drive Number - not used
    UCHAR       bsReserved1;        // Reserved
    UCHAR       bsBootSignature;    // New Format Boot Signature - 0x29
    ULONG       bsVolumeID;         // VolumeID - set to 0x12345678
    CCHAR       bsLabel[11];        // Label - set to RamDisk
    CCHAR       bsFileSystemType[8];// File System Type - FAT12 or FAT16
    CCHAR       bsReserved2[448];   // Reserved
    UCHAR       bsSig2[2];          // Originial Boot Signature - 0x55, 0xAA
}   BOOT_SECTOR, *PBOOT_SECTOR;

typedef struct  _DIR_ENTRY
{
    UCHAR       deName[8];          // File Name
    UCHAR       deExtension[3];     // File Extension
    UCHAR       deAttributes;       // File Attributes
    UCHAR       deReserved;         // Reserved
    USHORT      deTime;             // File Time
    USHORT      deDate;             // File Date
    USHORT      deStartCluster;     // First Cluster of file
    ULONG       deFileSize;         // File Length
}   DIR_ENTRY, *PDIR_ENTRY;

#pragma pack()

//
// Directory Entry Attributes
//

#define DIR_ATTR_READONLY   0x01
#define DIR_ATTR_HIDDEN     0x02
#define DIR_ATTR_SYSTEM     0x04
#define DIR_ATTR_VOLUME     0x08
#define DIR_ATTR_DIRECTORY  0x10
#define DIR_ATTR_ARCHIVE    0x20

int
sprintf(char *s, const char *format, ...);

//
// Device driver routine declarations.
//

NTSTATUS
DriverEntry(
    IN OUT PDRIVER_OBJECT   DriverObject,
    IN PUNICODE_STRING      RegistryPath
    );

NTSTATUS
RamDiskInitializeDisk(
    IN PDRIVER_OBJECT       DriverObject,
    IN PUNICODE_STRING      ParamPath
    );

void
RamDiskFormatFat(
    IN PRAMDISK_EXTENSION   DiskExtension,
    IN PUNICODE_STRING      ParamPath
    );

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

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

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

VOID
RamDiskUnloadDriver(
    IN PDRIVER_OBJECT       DriverObject
    );