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windows-nt/Source/XPSP1/NT/drivers/storage/disk/disk.h

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/*++
Copyright (C) Microsoft Corporation, 1991 - 1999
Module Name:
disk.c
Abstract:
SCSI disk class driver
Environment:
kernel mode only
Notes:
Revision History:
--*/
#include "ntddk.h"
#include "scsi.h"
#include <wmidata.h>
#include "classpnp.h"
#if defined(JAPAN) && defined(_X86_)
#include "machine.h"
#endif
#include <wmistr.h>
#if defined(_X86_)
#include "mountdev.h"
#endif
#ifdef ExAllocatePool
#undef ExAllocatePool
#define ExAllocatePool #assert(FALSE)
#endif
#define DISK_TAG_GENERAL ' DcS' // "ScD " - generic tag
#define DISK_TAG_SMART 'aDcS' // "ScDa" - SMART allocations
#define DISK_TAG_INFO_EXCEPTION 'ADcS' // "ScDA" - Info Exceptions
#define DISK_TAG_DISABLE_CACHE 'CDcS' // "ScDC" - disable cache paths
#define DISK_TAG_CCONTEXT 'cDcS' // "ScDc" - disk allocated completion context
#define DISK_TAG_DISK_GEOM 'GDcS' // "ScDG" - disk geometry buffer
#define DISK_TAG_UPDATE_GEOM 'gDcS' // "ScDg" - update disk geometry paths
#define DISK_TAG_SENSE_INFO 'IDcS' // "ScDI" - sense info buffers
#define DISK_TAG_PNP_ID 'iDcS' // "ScDp" - pnp ids
#define DISK_TAG_MODE_DATA 'MDcS' // "ScDM" - mode data buffer
#define DISK_CACHE_MBR_CHECK 'mDcS' // "ScDM" - mbr checksum code
#define DISK_TAG_NAME 'NDcS' // "ScDN" - disk name code
#define DISK_TAG_READ_CAP 'PDcS' // "ScDP" - read capacity buffer
#define DISK_TAG_PART_LIST 'pDcS' // "ScDp" - disk partition lists
#define DISK_TAG_SRB 'SDcS' // "ScDS" - srb allocation
#define DISK_TAG_START 'sDcS' // "ScDs" - start device paths
#define DISK_TAG_UPDATE_CAP 'UDcS' // "ScDU" - update capacity path
#define DISK_TAG_WI_CONTEXT 'WDcS' // "ScDW" - work-item context
typedef
VOID
(*PDISK_UPDATE_PARTITIONS) (
IN PDEVICE_OBJECT Fdo,
IN OUT PDRIVE_LAYOUT_INFORMATION_EX PartitionList
);
#if defined(_X86_)
//
// Disk device data
//
typedef enum _DISK_GEOMETRY_SOURCE {
DiskGeometryUnknown,
DiskGeometryFromBios,
DiskGeometryFromPort,
DiskGeometryFromNec98,
DiskGeometryGuessedFromBios,
DiskGeometryFromDefault
} DISK_GEOMETRY_SOURCE, *PDISK_GEOMETRY_SOURCE;
#endif
//
typedef struct _DISK_DATA {
//
// This field is the ordinal of a partition as it appears on a disk.
//
ULONG PartitionOrdinal;
//
// How has this disk been partitioned? Either EFI or MBR.
//
PARTITION_STYLE PartitionStyle;
union {
struct {
//
// Disk signature (from MBR)
//
ULONG Signature;
//
// MBR checksum
//
ULONG MbrCheckSum;
//
// Number of hidden sectors for BPB.
//
ULONG HiddenSectors;
//
// Partition type of this device object
//
// This field is set by:
//
// 1. Initially set according to the partition list entry
// partition type returned by IoReadPartitionTable.
//
// 2. Subsequently set by the
// IOCTL_DISK_SET_PARTITION_INFORMATION I/O control
// function when IoSetPartitionInformation function
// successfully updates the partition type on the disk.
//
UCHAR PartitionType;
//
// Boot indicator - indicates whether this partition is a
// bootable (active) partition for this device
//
// This field is set according to the partition list entry boot
// indicator returned by IoReadPartitionTable.
//
BOOLEAN BootIndicator;
} Mbr;
struct {
//
// The DiskGUID field from the EFI partition header.
//
GUID DiskId;
//
// Partition type of this device object.
//
GUID PartitionType;
//
// Unique partition identifier for this partition.
//
GUID PartitionId;
//
// EFI partition attributes for this partition.
//
ULONG64 Attributes;
//
// EFI partition name of this partition.
//
WCHAR PartitionName[36];
} Efi;
}; // unnamed union
struct {
//
// This flag is set when the well known name is created (through
// DiskCreateSymbolicLinks) and cleared when destroying it
// (by calling DiskDeleteSymbolicLinks).
//
BOOLEAN WellKnownNameCreated : 1;
//
// This flag is set when the PhysicalDriveN link is created (through
// DiskCreateSymbolicLinks) and is cleared when destroying it (through
// DiskDeleteSymbolicLinks)
//
BOOLEAN PhysicalDriveLinkCreated : 1;
} LinkStatus;
//
// ReadyStatus - STATUS_SUCCESS indicates that the drive is ready for
// use. Any error status is to be returned as an explaination for why
// a request is failed.
//
// This was done solely for the zero-length partition case of having no
// media in a removable disk drive. When that occurs, and a read is sent
// to the zero-length non-partition-zero PDO that was created, we had to
// be able to fail the request with a reasonable value. This may not have
// been the best way to do this, but it works.
//
NTSTATUS ReadyStatus;
//
// Routine to be called when updating the disk partitions. This routine
// is different for removable and non-removable media and is called by
// (among other things) DiskEnumerateDevice
//
PDISK_UPDATE_PARTITIONS UpdatePartitionRoutine;
//
// SCSI address used for SMART operations.
//
SCSI_ADDRESS ScsiAddress;
//
// Event used to synchronize partitioning operations and enumerations.
//
KEVENT PartitioningEvent;
//
// These unicode strings hold the disk and volume interface strings. If
// the interfaces were not registered or could not be set then the string
// buffer will be NULL.
//
UNICODE_STRING DiskInterfaceString;
UNICODE_STRING PartitionInterfaceString;
//
// What type of failure prediction mechanism is available
//
FAILURE_PREDICTION_METHOD FailurePredictionCapability;
BOOLEAN AllowFPPerfHit;
#if defined(_X86_)
//
// This flag indiciates that a non-default geometry for this drive has
// already been determined by the disk driver. This field is ignored
// for removable media drives.
//
DISK_GEOMETRY_SOURCE GeometrySource;
//
// If GeometryDetermined is TRUE this will contain the geometry which was
// reported by the firmware or by the BIOS. For removable media drives
// this will contain the last geometry used when media was present.
//
DISK_GEOMETRY RealGeometry;
#endif
//
// Indicates that the cached partition table is valid when set.
//
ULONG CachedPartitionTableValid;
//
// The cached partition table - this is only valid if the previous
// flag is set. When invalidated the cached partition table will be
// freed and replaced the next time one of the partitioning functions is
// called. This allows the error handling routines to invalidate it by
// setting the flag and doesn't require that they obtain a lock.
//
PDRIVE_LAYOUT_INFORMATION_EX CachedPartitionTable;
//
// This mutex prevents more than one IOCTL_DISK_VERIFY from being
// sent down to the disk. This greatly reduces the possibility of
// a Denial-of-Service attack
//
KMUTEX VerifyMutex;
} DISK_DATA, *PDISK_DATA;
// Define a general structure of identfing disk controllers with bad
// hardware.
//
#define HackDisableTaggedQueuing (0x01)
#define HackDisableSynchronousTransfers (0x02)
#define HackDisableSpinDown (0x04)
#define HackDisableWriteCache (0x08)
#define HackCauseNotReportableHack (0x10)
#define HackRequiresStartUnitCommand (0x20)
#define HackDisableWriteCacheNotSupported (0x40)
#define DiskDeviceParameterSubkey L"Disk"
#define DiskDeviceSpecialFlags L"SpecialFlags"
#define DiskDeviceUserWriteCacheSetting L"UserWriteCacheSetting"
#define FUNCTIONAL_EXTENSION_SIZE sizeof(FUNCTIONAL_DEVICE_EXTENSION) + sizeof(DISK_DATA)
#define PHYSICAL_EXTENSION_SIZE sizeof(PHYSICAL_DEVICE_EXTENSION) + sizeof(DISK_DATA)
#define MODE_DATA_SIZE 192
#define VALUE_BUFFER_SIZE 2048
#define SCSI_DISK_TIMEOUT 10
#define PARTITION0_LIST_SIZE 4
#define MAX_MEDIA_TYPES 4
typedef struct _DISK_MEDIA_TYPES_LIST {
PCHAR VendorId;
PCHAR ProductId;
PCHAR Revision;
const ULONG NumberOfTypes;
const ULONG NumberOfSides;
const STORAGE_MEDIA_TYPE MediaTypes[MAX_MEDIA_TYPES];
} DISK_MEDIA_TYPES_LIST, *PDISK_MEDIA_TYPES_LIST;
//
// WMI reregistration structures used for reregister work item
//
typedef struct
{
SINGLE_LIST_ENTRY Next;
PDEVICE_OBJECT DeviceObject;
PIRP Irp;
} DISKREREGREQUEST, *PDISKREREGREQUEST;
//
// Write cache setting as defined by the user
//
typedef enum _DISK_USER_WRITE_CACHE_SETTING
{
DiskWriteCacheDisable = 0,
DiskWriteCacheEnable = 1,
DiskWriteCacheDefault = -1
} DISK_USER_WRITE_CACHE_SETTING, *PDISK_USER_WRITE_CACHE_SETTING;
#define MAX_SECTORS_PER_VERIFY 0x200
//
// This is based off 100ns units
//
#define ONE_MILLI_SECOND ((ULONGLONG)10 * 1000)
//
// Context for the work-item
//
typedef struct _DISK_VERIFY_WORKITEM_CONTEXT
{
PIRP Irp;
PSCSI_REQUEST_BLOCK Srb;
PIO_WORKITEM WorkItem;
} DISK_VERIFY_WORKITEM_CONTEXT, *PDISK_VERIFY_WORKITEM_CONTEXT;
//
// Poll for Failure Prediction every hour
//
#define DISK_DEFAULT_FAILURE_POLLING_PERIOD 1 * 60 * 60
//
// Static global lookup tables.
//
extern CLASSPNP_SCAN_FOR_SPECIAL_INFO DiskBadControllers[];
extern const DISK_MEDIA_TYPES_LIST DiskMediaTypes[];
//
// Macros
//
//
// Routine prototypes.
//
NTSTATUS
DriverEntry(
IN PDRIVER_OBJECT DriverObject,
IN PUNICODE_STRING RegistryPath
);
VOID
DiskUnload(
IN PDRIVER_OBJECT DriverObject
);
NTSTATUS
DiskAddDevice(
IN PDRIVER_OBJECT DriverObject,
IN PDEVICE_OBJECT Pdo
);
NTSTATUS
DiskInitFdo(
IN PDEVICE_OBJECT Fdo
);
NTSTATUS
DiskInitPdo(
IN PDEVICE_OBJECT Pdo
);
NTSTATUS
DiskStartFdo(
IN PDEVICE_OBJECT Fdo
);
NTSTATUS
DiskStartPdo(
IN PDEVICE_OBJECT Pdo
);
NTSTATUS
DiskStopDevice(
IN PDEVICE_OBJECT DeviceObject,
IN UCHAR Type
);
NTSTATUS
DiskRemoveDevice(
IN PDEVICE_OBJECT DeviceObject,
IN UCHAR Type
);
NTSTATUS
DiskReadWriteVerification(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
);
NTSTATUS
DiskDeviceControl(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
);
VOID
DiskFdoProcessError(
PDEVICE_OBJECT DeviceObject,
PSCSI_REQUEST_BLOCK Srb,
NTSTATUS *Status,
BOOLEAN *Retry
);
NTSTATUS
DiskShutdownFlush(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
);
NTSTATUS
DiskGetCacheInformation(
IN PFUNCTIONAL_DEVICE_EXTENSION FdoExtension,
IN PDISK_CACHE_INFORMATION CacheInfo
);
NTSTATUS
DiskSetCacheInformation(
IN PFUNCTIONAL_DEVICE_EXTENSION FdoExtension,
IN PDISK_CACHE_INFORMATION CacheInfo
);
VOID
DiskLogCacheInformation(
IN PFUNCTIONAL_DEVICE_EXTENSION FdoExtension,
IN PDISK_CACHE_INFORMATION CacheInfo,
IN NTSTATUS Status
);
VOID
DisableWriteCache(
IN PDEVICE_OBJECT DeviceObject,
IN PIO_WORKITEM WorkItem
);
VOID
DiskIoctlVerify(
IN PDEVICE_OBJECT DeviceObject,
IN PDISK_VERIFY_WORKITEM_CONTEXT Context
);
NTSTATUS
DiskModeSelect(
IN PDEVICE_OBJECT DeviceObject,
IN PCHAR ModeSelectBuffer,
IN ULONG Length,
IN BOOLEAN SavePage
);
//
// We need to validate that the self test subcommand is valid and
// appropriate. Right now we allow subcommands 0, 1 and 2 which are non
// captive mode tests. Once we figure out a way to know if it is safe to
// run a captive test then we can allow captive mode tests. Also if the
// atapi 5 spec is ever updated to denote that bit 7 is the captive
// mode bit, we can allow any request that does not have bit 7 set. Until
// that is done we want to be sure
//
#define DiskIsValidSmartSelfTest(Subcommand) \
( ((Subcommand) == SMART_OFFLINE_ROUTINE_OFFLINE) || \
((Subcommand) == SMART_SHORT_SELFTEST_OFFLINE) || \
((Subcommand) == SMART_EXTENDED_SELFTEST_OFFLINE) )
NTSTATUS
DiskPerformSmartCommand(
IN PFUNCTIONAL_DEVICE_EXTENSION FdoExtension,
IN ULONG SrbControlCode,
IN UCHAR Command,
IN UCHAR Feature,
IN UCHAR SectorCount,
IN UCHAR SectorNumber,
IN OUT PSRB_IO_CONTROL SrbControl,
OUT PULONG BufferSize
);
NTSTATUS
DiskGetInfoExceptionInformation(
IN PFUNCTIONAL_DEVICE_EXTENSION FdoExtension,
OUT PMODE_INFO_EXCEPTIONS ReturnPageData
);
NTSTATUS
DiskSetInfoExceptionInformation(
IN PFUNCTIONAL_DEVICE_EXTENSION FdoExtension,
IN PMODE_INFO_EXCEPTIONS PageData
);
NTSTATUS
DiskDetectFailurePrediction(
PFUNCTIONAL_DEVICE_EXTENSION FdoExtension,
PFAILURE_PREDICTION_METHOD FailurePredictCapability
);
BOOLEAN
EnumerateBusKey(
IN PFUNCTIONAL_DEVICE_EXTENSION DeviceExtension,
HANDLE BusKey,
PULONG DiskNumber
);
NTSTATUS
DiskCreateFdo(
IN PDRIVER_OBJECT DriverObject,
IN PDEVICE_OBJECT LowerDeviceObject,
IN PULONG DeviceCount,
IN BOOLEAN DasdAccessOnly
);
VOID
UpdateDeviceObjects(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
);
VOID
DiskSetSpecialHacks(
IN PFUNCTIONAL_DEVICE_EXTENSION FdoExtension,
IN ULONG_PTR Data
);
VOID
DiskScanRegistryForSpecial(
IN PFUNCTIONAL_DEVICE_EXTENSION FdoExtension
);
VOID
ResetBus(
IN PDEVICE_OBJECT DeviceObject
);
NTSTATUS
DiskEnumerateDevice(
IN PDEVICE_OBJECT Fdo
);
NTSTATUS
DiskQueryId(
IN PDEVICE_OBJECT Pdo,
IN BUS_QUERY_ID_TYPE IdType,
IN PUNICODE_STRING UnicodeIdString
);
NTSTATUS
DiskQueryPnpCapabilities(
IN PDEVICE_OBJECT DeviceObject,
IN PDEVICE_CAPABILITIES Capabilities
);
NTSTATUS
DiskGenerateDeviceName(
IN BOOLEAN IsFdo,
IN ULONG DeviceNumber,
IN OPTIONAL ULONG PartitionNumber,
IN OPTIONAL PLARGE_INTEGER StartingOffset,
IN OPTIONAL PLARGE_INTEGER PartitionLength,
OUT PUCHAR *RawName
);
VOID
DiskCreateSymbolicLinks(
IN PDEVICE_OBJECT DeviceObject
);
VOID
DiskUpdatePartitions(
IN PDEVICE_OBJECT Fdo,
IN OUT PDRIVE_LAYOUT_INFORMATION_EX PartitionList
);
VOID
DiskUpdateRemovablePartitions(
IN PDEVICE_OBJECT Fdo,
IN OUT PDRIVE_LAYOUT_INFORMATION_EX PartitionList
);
NTSTATUS
DiskCreatePdo(
IN PDEVICE_OBJECT Fdo,
IN ULONG PartitionOrdinal,
IN PPARTITION_INFORMATION_EX PartitionEntry,
IN PARTITION_STYLE PartitionStyle,
OUT PDEVICE_OBJECT *Pdo
);
VOID
DiskDeleteSymbolicLinks(
IN PDEVICE_OBJECT DeviceObject
);
NTSTATUS
DiskPdoQueryWmiRegInfo(
IN PDEVICE_OBJECT DeviceObject,
OUT ULONG *RegFlags,
OUT PUNICODE_STRING InstanceName
);
NTSTATUS
DiskPdoQueryWmiDataBlock(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN ULONG GuidIndex,
IN ULONG BufferAvail,
OUT PUCHAR Buffer
);
NTSTATUS
DiskPdoSetWmiDataBlock(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN ULONG GuidIndex,
IN ULONG BufferSize,
IN PUCHAR Buffer
);
NTSTATUS
DiskPdoSetWmiDataItem(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN ULONG GuidIndex,
IN ULONG DataItemId,
IN ULONG BufferSize,
IN PUCHAR Buffer
);
NTSTATUS
DiskPdoExecuteWmiMethod(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN ULONG GuidIndex,
IN ULONG MethodId,
IN ULONG InBufferSize,
IN ULONG OutBufferSize,
IN PUCHAR Buffer
);
NTSTATUS
DiskFdoQueryWmiRegInfo(
IN PDEVICE_OBJECT DeviceObject,
OUT ULONG *RegFlags,
OUT PUNICODE_STRING InstanceName
);
NTSTATUS
DiskFdoQueryWmiRegInfoEx(
IN PDEVICE_OBJECT DeviceObject,
OUT ULONG *RegFlags,
OUT PUNICODE_STRING InstanceName,
OUT PUNICODE_STRING MofName
);
NTSTATUS
DiskFdoQueryWmiDataBlock(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN ULONG GuidIndex,
IN ULONG BufferAvail,
OUT PUCHAR Buffer
);
NTSTATUS
DiskFdoSetWmiDataBlock(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN ULONG GuidIndex,
IN ULONG BufferSize,
IN PUCHAR Buffer
);
NTSTATUS
DiskFdoSetWmiDataItem(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN ULONG GuidIndex,
IN ULONG DataItemId,
IN ULONG BufferSize,
IN PUCHAR Buffer
);
NTSTATUS
DiskFdoExecuteWmiMethod(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN ULONG GuidIndex,
IN ULONG MethodId,
IN ULONG InBufferSize,
IN ULONG OutBufferSize,
IN PUCHAR Buffer
);
NTSTATUS
DiskWmiFunctionControl(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN ULONG GuidIndex,
IN CLASSENABLEDISABLEFUNCTION Function,
IN BOOLEAN Enable
);
NTSTATUS
DiskReadFailurePredictStatus(
PFUNCTIONAL_DEVICE_EXTENSION FdoExtension,
PSTORAGE_FAILURE_PREDICT_STATUS DiskSmartStatus
);
NTSTATUS
DiskReadFailurePredictData(
PFUNCTIONAL_DEVICE_EXTENSION FdoExtension,
PSTORAGE_FAILURE_PREDICT_DATA DiskSmartData
);
NTSTATUS
DiskEnableDisableFailurePrediction(
PFUNCTIONAL_DEVICE_EXTENSION FdoExtension,
BOOLEAN Enable
);
NTSTATUS
DiskEnableDisableFailurePredictPolling(
PFUNCTIONAL_DEVICE_EXTENSION FdoExtension,
BOOLEAN Enable,
ULONG PollTimeInSeconds
);
VOID
DiskAcquirePartitioningLock(
IN PFUNCTIONAL_DEVICE_EXTENSION FdoExtension
);
VOID
DiskReleasePartitioningLock(
IN PFUNCTIONAL_DEVICE_EXTENSION FdoExtension
);
NTSTATUS DiskInitializeReregistration(
void
);
extern GUIDREGINFO DiskWmiFdoGuidList[];
extern GUIDREGINFO DiskWmiPdoGuidList[];
#if defined(_X86_)
NTSTATUS
DiskReadDriveCapacity(
IN PDEVICE_OBJECT Fdo
);
#else
#define DiskReadDriveCapacity(Fdo) ClassReadDriveCapacity(Fdo)
#endif
#if defined(_X86_)
#if 0
NTSTATUS
DiskQuerySuggestedLinkName(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp
);
#endif
NTSTATUS
DiskSaveDetectInfo(
PDRIVER_OBJECT DriverObject
);
VOID
DiskCleanupDetectInfo(
IN PDRIVER_OBJECT DriverObject
);
VOID
DiskDriverReinitialization (
IN PDRIVER_OBJECT DriverObject,
IN PVOID Nothing,
IN ULONG Count
);
#endif
VOID
DiskConvertPartitionToExtended(
IN PPARTITION_INFORMATION Partition,
OUT PPARTITION_INFORMATION_EX PartitionEx
);
PDRIVE_LAYOUT_INFORMATION_EX
DiskConvertLayoutToExtended(
IN CONST PDRIVE_LAYOUT_INFORMATION Layout
);
PDRIVE_LAYOUT_INFORMATION
DiskConvertExtendedToLayout(
IN CONST PDRIVE_LAYOUT_INFORMATION_EX LayoutEx
);
NTSTATUS
DiskReadPartitionTableEx(
IN PFUNCTIONAL_DEVICE_EXTENSION Fdo,
IN BOOLEAN BypassCache,
OUT PDRIVE_LAYOUT_INFORMATION_EX* DriveLayout
);
NTSTATUS
DiskWritePartitionTableEx(
IN PFUNCTIONAL_DEVICE_EXTENSION Fdo,
IN PDRIVE_LAYOUT_INFORMATION_EX DriveLayout
);
NTSTATUS
DiskSetPartitionInformationEx(
IN PFUNCTIONAL_DEVICE_EXTENSION Fdo,
IN ULONG PartitionNumber,
IN struct _SET_PARTITION_INFORMATION_EX* PartitionInfo
);
NTSTATUS
DiskSetPartitionInformation(
IN PFUNCTIONAL_DEVICE_EXTENSION Fdo,
IN ULONG SectorSize,
IN ULONG PartitionNumber,
IN ULONG PartitionType
);
NTSTATUS
DiskVerifyPartitionTable(
IN PFUNCTIONAL_DEVICE_EXTENSION Fdo,
IN BOOLEAN FixErrors
);
BOOLEAN
DiskInvalidatePartitionTable(
IN PFUNCTIONAL_DEVICE_EXTENSION Fdo,
IN BOOLEAN PartitionLockHeld
);
#if defined (_X86_)
NTSTATUS
DiskGetDetectInfo(
IN PFUNCTIONAL_DEVICE_EXTENSION FdoExtension,
OUT PDISK_DETECTION_INFO DetectInfo
);
NTSTATUS
DiskReadSignature(
IN PDEVICE_OBJECT Fdo
);
#else
#define DiskGetDetectInfo(FdoExtension, DetectInfo) (STATUS_UNSUCCESSFUL)
#endif
#define DiskHashGuid(Guid) (((PULONG) &Guid)[0] ^ ((PULONG) &Guid)[0] ^ ((PULONG) &Guid)[0] ^ ((PULONG) &Guid)[0])
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