/*++ BUILD Version: 0013    // Increment this if a change has global effects

Copyright (c) 1989  Microsoft Corporation

Module Name:

    io.h

Abstract:

    This module contains the internal structure definitions and APIs used by
    the NT I/O system.

Author:

    Darryl E. Havens (darrylh) 12-Apr-1989


Revision History:


--*/

#ifndef _IO_
#define _IO_

// begin_ntddk begin_nthal begin_ntifs
//
// Define I/O system data structure type codes.  Each major data structure in
// the I/O system has a type code  The type field in each structure is at the
// same offset.  The following values can be used to determine which type of
// data structure a pointer refers to.
//

#define IO_TYPE_ADAPTER                 0x00000001
#define IO_TYPE_CONTROLLER              0x00000002
#define IO_TYPE_DEVICE                  0x00000003
#define IO_TYPE_DRIVER                  0x00000004
#define IO_TYPE_FILE                    0x00000005
#define IO_TYPE_IRP                     0x00000006
#define IO_TYPE_MASTER_ADAPTER          0x00000007
#define IO_TYPE_OPEN_PACKET             0x00000008
#define IO_TYPE_TIMER                   0x00000009
#define IO_TYPE_VPB                     0x0000000a
#define IO_TYPE_ERROR_LOG               0x0000000b
#define IO_TYPE_ERROR_MESSAGE           0x0000000c
#define IO_TYPE_DEVICE_OBJECT_EXTENSION 0x0000000d

//
// Define the major function codes for IRPs.  The lower 128 codes, from 0x00 to
// 0x7f are reserved to Microsoft.  The upper 128 codes, from 0x80 to 0xff, are
// reserved to customers of Microsoft.
//

#define IRP_MJ_CREATE                   0x00
#define IRP_MJ_CREATE_NAMED_PIPE        0x01
#define IRP_MJ_CLOSE                    0x02
#define IRP_MJ_READ                     0x03
#define IRP_MJ_WRITE                    0x04
#define IRP_MJ_QUERY_INFORMATION        0x05
#define IRP_MJ_SET_INFORMATION          0x06
#define IRP_MJ_QUERY_EA                 0x07
#define IRP_MJ_SET_EA                   0x08
#define IRP_MJ_FLUSH_BUFFERS            0x09
#define IRP_MJ_QUERY_VOLUME_INFORMATION 0x0a
#define IRP_MJ_SET_VOLUME_INFORMATION   0x0b
#define IRP_MJ_DIRECTORY_CONTROL        0x0c
#define IRP_MJ_FILE_SYSTEM_CONTROL      0x0d
#define IRP_MJ_DEVICE_CONTROL           0x0e
#define IRP_MJ_INTERNAL_DEVICE_CONTROL  0x0f
#define IRP_MJ_SHUTDOWN                 0x10
#define IRP_MJ_LOCK_CONTROL             0x11
#define IRP_MJ_CLEANUP                  0x12
#define IRP_MJ_CREATE_MAILSLOT          0x13
#define IRP_MJ_QUERY_SECURITY           0x14
#define IRP_MJ_SET_SECURITY             0x15
#define IRP_MJ_QUERY_POWER              0x16
#define IRP_MJ_SET_POWER                0x17
#define IRP_MJ_DEVICE_CHANGE            0x18
#define IRP_MJ_QUERY_QUOTA              0x19
#define IRP_MJ_SET_QUOTA                0x1a
#define IRP_MJ_PNP_POWER                0x1b
#define IRP_MJ_MAXIMUM_FUNCTION         0x1b

//
// Make the Scsi major code the same as internal device control.
//

#define IRP_MJ_SCSI                     IRP_MJ_INTERNAL_DEVICE_CONTROL

//
// Define the minor function codes for IRPs.  The lower 128 codes, from 0x00 to
// 0x7f are reserved to Microsoft.  The upper 128 codes, from 0x80 to 0xff, are
// reserved to customers of Microsoft.
//

//
// Directory control minor function codes
//

#define IRP_MN_QUERY_DIRECTORY          0x01
#define IRP_MN_NOTIFY_CHANGE_DIRECTORY  0x02
#define IRP_MN_QUERY_OLE_DIRECTORY      0x03

//
// File system control minor function codes.  Note that "user request" is
// assumed to be zero by both the I/O system and file systems.  Do not change
// this value.
//

#define IRP_MN_USER_FS_REQUEST          0x00
#define IRP_MN_MOUNT_VOLUME             0x01
#define IRP_MN_VERIFY_VOLUME            0x02
#define IRP_MN_LOAD_FILE_SYSTEM         0x03

//
// Lock control minor function codes
//

#define IRP_MN_LOCK                     0x01
#define IRP_MN_UNLOCK_SINGLE            0x02
#define IRP_MN_UNLOCK_ALL               0x03
#define IRP_MN_UNLOCK_ALL_BY_KEY        0x04

//
// Read and Write minor function codes for file systems supporting Lan Manager
// software.  All of these subfunction codes are invalid if the file has been
// opened with FO_NO_INTERMEDIATE_BUFFERING.  They are also invalid in combi-
// nation with synchronous calls (Irp Flag or file open option).
//
// Note that "normal" is assumed to be zero by both the I/O system and file
// systems.  Do not change this value.
//

#define IRP_MN_NORMAL                   0x00
#define IRP_MN_DPC                      0x01
#define IRP_MN_MDL                      0x02
#define IRP_MN_COMPLETE                 0x04
#define IRP_MN_COMPRESSED               0x08

#define IRP_MN_MDL_DPC                  (IRP_MN_MDL | IRP_MN_DPC)
#define IRP_MN_COMPLETE_MDL             (IRP_MN_COMPLETE | IRP_MN_MDL)
#define IRP_MN_COMPLETE_MDL_DPC         (IRP_MN_COMPLETE_MDL | IRP_MN_DPC)

//
// Device Control Request minor function codes for SCSI support. Note that
// user requests are assumed to be zero.
//

#define IRP_MN_SCSI_CLASS               0x01

//
// PNP/Power minor function codes.
//

#define IRP_MN_START_DEVICE             0x00
#define IRP_MN_QUERY_REMOVE_DEVICE      0x01
#define IRP_MN_REMOVE_DEVICE            0x02
#define IRP_MN_CANCEL_REMOVE_DEVICE     0x03
#define IRP_MN_STOP_DEVICE              0x04
#define IRP_MN_QUERY_STOP_DEVICE        0x05
#define IRP_MN_CANCEL_STOP_DEVICE       0x06

//
// Define option flags for IoCreateFile.  Note that these values must be
// exactly the same as the SL_... flags for a create function.  Note also
// that there are flags that may be passed to IoCreateFile that are not
// placed in the stack location for the create IRP.  These flags start in
// the next byte.
//

#define IO_FORCE_ACCESS_CHECK           0x0001
#define IO_OPEN_PAGING_FILE             0x0002
#define IO_OPEN_TARGET_DIRECTORY        0x0004

// end_ntddk end_nthal

//
// Flags not passed to driver
//

#define IO_NO_PARAMETER_CHECKING        0x0100
#define IO_CHECK_CREATE_PARAMETERS      0x0200
#define IO_ATTACH_DEVICE                0x0400

//
// Define kernel-only, internal option flags
//

#define IO_ATTACH_DEVICE_API            0x80000000

//
// Define Information fields for whether or not a REPARSE or a REMOUNT has
// occurred in the file system.
//

#define IO_REPARSE                      0x0
#define IO_REMOUNT                      0x1

// end_ntifs

//
// Define the driver interfaces required to write memory dumps.
//

//
// Define stall routine type for the dump driver.
//

typedef
VOID
(*PSTALL_ROUTINE) (
    IN ULONG Delay
    );

//
// Define the interfaces for the dump driver's routines.
//

typedef
BOOLEAN
(*PDUMP_DRIVER_OPEN) (
    IN LARGE_INTEGER PartitionOffset
    );

typedef
NTSTATUS
(*PDUMP_DRIVER_WRITE) (
    IN PLARGE_INTEGER DiskByteOffset,
    IN PMDL Mdl
    );


typedef
VOID
(*PDUMP_DRIVER_FINISH) (
    VOID
    );

struct _ADAPTER_OBJECT;

//
// This is the information passed from the system to the disk dump driver
// during the driver's initialization.
//

typedef struct _INITIALIZATION_CONTEXT {
    ULONG Length;
    ULONG DiskSignature;
    PVOID MemoryBlock;
    PVOID CommonBuffer[2];
    PHYSICAL_ADDRESS PhysicalAddress[2];
    PSTALL_ROUTINE StallRoutine;
    PDUMP_DRIVER_OPEN OpenRoutine;
    PDUMP_DRIVER_WRITE WriteRoutine;
    PDUMP_DRIVER_FINISH FinishRoutine;
    struct _ADAPTER_OBJECT *AdapterObject;
    PVOID MappedRegisterBase;
    PVOID PortConfiguration;
} INITIALIZATION_CONTEXT, *PINITIALIZATION_CONTEXT;

// begin_ntddk begin_ntifs
//
// Define callout routine type for use in IoQueryDeviceDescription().
//

typedef NTSTATUS (*PIO_QUERY_DEVICE_ROUTINE)(
    IN PVOID Context,
    IN PUNICODE_STRING PathName,
    IN INTERFACE_TYPE BusType,
    IN ULONG BusNumber,
    IN PKEY_VALUE_FULL_INFORMATION *BusInformation,
    IN CONFIGURATION_TYPE ControllerType,
    IN ULONG ControllerNumber,
    IN PKEY_VALUE_FULL_INFORMATION *ControllerInformation,
    IN CONFIGURATION_TYPE PeripheralType,
    IN ULONG PeripheralNumber,
    IN PKEY_VALUE_FULL_INFORMATION *PeripheralInformation
    );

//
// Defines the order of the information in the array of
// PKEY_VALUE_FULL_INFORMATION.
//

typedef enum _IO_QUERY_DEVICE_DATA_FORMAT {
    IoQueryDeviceIdentifier = 0,
    IoQueryDeviceConfigurationData,
    IoQueryDeviceComponentInformation,
    IoQueryDeviceMaxData
} IO_QUERY_DEVICE_DATA_FORMAT, *PIO_QUERY_DEVICE_DATA_FORMAT;

//
// Define the objects that can be created by IoCreateFile.
//

typedef enum _CREATE_FILE_TYPE {
    CreateFileTypeNone,
    CreateFileTypeNamedPipe,
    CreateFileTypeMailslot
} CREATE_FILE_TYPE;

// end_ntddk

//
// Define the named pipe create parameters structure used for internal calls
// to IoCreateFile when a named pipe is being created.  This structure allows
// code invoking this routine to pass information specific to this function
// when creating a named pipe.
//

typedef struct _NAMED_PIPE_CREATE_PARAMETERS {
    ULONG NamedPipeType;
    ULONG ReadMode;
    ULONG CompletionMode;
    ULONG MaximumInstances;
    ULONG InboundQuota;
    ULONG OutboundQuota;
    LARGE_INTEGER DefaultTimeout;
    BOOLEAN TimeoutSpecified;
} NAMED_PIPE_CREATE_PARAMETERS, *PNAMED_PIPE_CREATE_PARAMETERS;

//
// Define the mailslot create parameters structure used for internal calls
// to IoCreateFile when a mailslot is being created.  This structure allows
// code invoking this routine to pass information specific to this function
// when creating a mailslot.
//

typedef struct _MAILSLOT_CREATE_PARAMETERS {
    ULONG MailslotQuota;
    ULONG MaximumMessageSize;
    LARGE_INTEGER ReadTimeout;
    BOOLEAN TimeoutSpecified;
} MAILSLOT_CREATE_PARAMETERS, *PMAILSLOT_CREATE_PARAMETERS;

// begin_ntddk begin_nthal
//
// Define the structures used by the I/O system
//

//
// Define empty typedefs for the _IRP, _DEVICE_OBJECT, and _DRIVER_OBJECT
// structures so they may be referenced by function types before they are
// actually defined.
//

struct _DEVICE_OBJECT;
struct _DRIVER_OBJECT;
struct _DRIVE_LAYOUT_INFORMATION;
struct _DISK_PARTITION;
struct _FILE_OBJECT;
struct _IRP;
struct _SCSI_REQUEST_BLOCK;

//
// Define the I/O version of a DPC routine.
//

typedef
VOID
(*PIO_DPC_ROUTINE) (
    IN PKDPC Dpc,
    IN struct _DEVICE_OBJECT *DeviceObject,
    IN struct _IRP *Irp,
    IN PVOID Context
    );

//
// Define driver timer routine type.
//

typedef
VOID
(*PIO_TIMER_ROUTINE) (
    IN struct _DEVICE_OBJECT *DeviceObject,
    IN PVOID Context
    );

//
// Define driver initialization routine type.
//

typedef
NTSTATUS
(*PDRIVER_INITIALIZE) (
    IN struct _DRIVER_OBJECT *DriverObject,
    IN PUNICODE_STRING RegistryPath
    );

//
// Define driver reinitialization routine type.
//

typedef
VOID
(*PDRIVER_REINITIALIZE) (
    IN struct _DRIVER_OBJECT *DriverObject,
    IN PVOID Context,
    IN ULONG Count
    );

//
// Define driver cancel routine type.
//

typedef
VOID
(*PDRIVER_CANCEL) (
    IN struct _DEVICE_OBJECT *DeviceObject,
    IN struct _IRP *Irp
    );

//
// Define driver dispatch routine type.
//

typedef
NTSTATUS
(*PDRIVER_DISPATCH) (
    IN struct _DEVICE_OBJECT *DeviceObject,
    IN struct _IRP *Irp
    );

//
// Define driver start I/O routine type.
//

typedef
VOID
(*PDRIVER_STARTIO) (
    IN struct _DEVICE_OBJECT *DeviceObject,
    IN struct _IRP *Irp
    );

//
// Define driver unload routine type.
//

typedef
VOID
(*PDRIVER_UNLOAD) (
    IN struct _DRIVER_OBJECT *DriverObject
    );

#ifdef _PNP_POWER_

//
// Define driver reconfiguration operations
//

typedef enum _DRIVER_RECONFIGURE_OPERATION {
    QueryReconfigureResources,
    ReconfigureResources,
    CancelReconfigureQuery,
    QueryHardwareProfileChange,
    HardwareProfileChanged
} DRIVER_RECONFIGURE_OPERATION;

//
// Define driver ReconfigureDevice routine type
//

typedef
NTSTATUS
(*PDRIVER_RECONFIGURE_DEVICE) (
    IN struct _DRIVER_OBJECT *DriverObject,
    IN struct _DEVICE_OBJECT *DeviceObject OPTIONAL,
    IN DRIVER_RECONFIGURE_OPERATION Operation,
    IN PCM_RESOURCE_LIST CmResources
    );

#endif // _PNP_POWER_

//
// Define driver AddDevice routine type.
//

typedef
NTSTATUS
(*PDRIVER_ADD_DEVICE) (
    IN struct _DRIVER_OBJECT *DriverObject,
    IN OUT struct _DEVICE_OBJECT **PhysicalDeviceObject
    );

// end_ntddk end_nthal

//
// Define driver FS notification change routine type.
//

typedef
VOID
(*PDRIVER_FS_NOTIFICATION) (
    IN struct _DEVICE_OBJECT *DeviceObject,
    IN BOOLEAN FsActive
    );

// begin_ntddk

//
// Define fast I/O procedure prototypes.
//
// Fast I/O read and write procedures.
//

typedef
BOOLEAN
(*PFAST_IO_CHECK_IF_POSSIBLE) (
    IN struct _FILE_OBJECT *FileObject,
    IN PLARGE_INTEGER FileOffset,
    IN ULONG Length,
    IN BOOLEAN Wait,
    IN ULONG LockKey,
    IN BOOLEAN CheckForReadOperation,
    OUT PIO_STATUS_BLOCK IoStatus,
    IN struct _DEVICE_OBJECT *DeviceObject
    );

typedef
BOOLEAN
(*PFAST_IO_READ) (
    IN struct _FILE_OBJECT *FileObject,
    IN PLARGE_INTEGER FileOffset,
    IN ULONG Length,
    IN BOOLEAN Wait,
    IN ULONG LockKey,
    OUT PVOID Buffer,
    OUT PIO_STATUS_BLOCK IoStatus,
    IN struct _DEVICE_OBJECT *DeviceObject
    );

typedef
BOOLEAN
(*PFAST_IO_WRITE) (
    IN struct _FILE_OBJECT *FileObject,
    IN PLARGE_INTEGER FileOffset,
    IN ULONG Length,
    IN BOOLEAN Wait,
    IN ULONG LockKey,
    IN PVOID Buffer,
    OUT PIO_STATUS_BLOCK IoStatus,
    IN struct _DEVICE_OBJECT *DeviceObject
    );

//
// Fast I/O query basic and standard information procedures.
//

typedef
BOOLEAN
(*PFAST_IO_QUERY_BASIC_INFO) (
    IN struct _FILE_OBJECT *FileObject,
    IN BOOLEAN Wait,
    OUT PFILE_BASIC_INFORMATION Buffer,
    OUT PIO_STATUS_BLOCK IoStatus,
    IN struct _DEVICE_OBJECT *DeviceObject
    );

typedef
BOOLEAN
(*PFAST_IO_QUERY_STANDARD_INFO) (
    IN struct _FILE_OBJECT *FileObject,
    IN BOOLEAN Wait,
    OUT PFILE_STANDARD_INFORMATION Buffer,
    OUT PIO_STATUS_BLOCK IoStatus,
    IN struct _DEVICE_OBJECT *DeviceObject
    );

//
// Fast I/O lock and unlock procedures.
//

typedef
BOOLEAN
(*PFAST_IO_LOCK) (
    IN struct _FILE_OBJECT *FileObject,
    IN PLARGE_INTEGER FileOffset,
    IN PLARGE_INTEGER Length,
    PEPROCESS ProcessId,
    ULONG Key,
    BOOLEAN FailImmediately,
    BOOLEAN ExclusiveLock,
    OUT PIO_STATUS_BLOCK IoStatus,
    IN struct _DEVICE_OBJECT *DeviceObject
    );

typedef
BOOLEAN
(*PFAST_IO_UNLOCK_SINGLE) (
    IN struct _FILE_OBJECT *FileObject,
    IN PLARGE_INTEGER FileOffset,
    IN PLARGE_INTEGER Length,
    PEPROCESS ProcessId,
    ULONG Key,
    OUT PIO_STATUS_BLOCK IoStatus,
    IN struct _DEVICE_OBJECT *DeviceObject
    );

typedef
BOOLEAN
(*PFAST_IO_UNLOCK_ALL) (
    IN struct _FILE_OBJECT *FileObject,
    PEPROCESS ProcessId,
    OUT PIO_STATUS_BLOCK IoStatus,
    IN struct _DEVICE_OBJECT *DeviceObject
    );

typedef
BOOLEAN
(*PFAST_IO_UNLOCK_ALL_BY_KEY) (
    IN struct _FILE_OBJECT *FileObject,
    PVOID ProcessId,
    ULONG Key,
    OUT PIO_STATUS_BLOCK IoStatus,
    IN struct _DEVICE_OBJECT *DeviceObject
    );

//
// Fast I/O device control procedure.
//

typedef
BOOLEAN
(*PFAST_IO_DEVICE_CONTROL) (
    IN struct _FILE_OBJECT *FileObject,
    IN BOOLEAN Wait,
    IN PVOID InputBuffer OPTIONAL,
    IN ULONG InputBufferLength,
    OUT PVOID OutputBuffer OPTIONAL,
    IN ULONG OutputBufferLength,
    IN ULONG IoControlCode,
    OUT PIO_STATUS_BLOCK IoStatus,
    IN struct _DEVICE_OBJECT *DeviceObject
    );

//
// Define callbacks for NtCreateSection to synchronize correctly with
// the file system.  It pre-acquires the resources that will be needed
// when calling to query and set file/allocation size in the file system.
//

typedef
VOID
(*PFAST_IO_ACQUIRE_FILE) (
    IN struct _FILE_OBJECT *FileObject
    );

typedef
VOID
(*PFAST_IO_RELEASE_FILE) (
    IN struct _FILE_OBJECT *FileObject
    );

//
// Define callback for drivers that have device objects attached to lower-
// level drivers' device objects.  This callback is made when the lower-level
// driver is deleting its device object.
//

typedef
VOID
(*PFAST_IO_DETACH_DEVICE) (
    IN struct _DEVICE_OBJECT *SourceDevice,
    IN struct _DEVICE_OBJECT *TargetDevice
    );

//
// This structure is used by the server to quickly get the information needed
// to service a server open call.  It is takes what would be two fast io calls
// one for basic information and the other for standard information and makes
// it into one call.
//

typedef
BOOLEAN
(*PFAST_IO_QUERY_NETWORK_OPEN_INFO) (
    IN struct _FILE_OBJECT *FileObject,
    IN BOOLEAN Wait,
    OUT struct _FILE_NETWORK_OPEN_INFORMATION *Buffer,
    OUT struct _IO_STATUS_BLOCK *IoStatus,
    IN struct _DEVICE_OBJECT *DeviceObject
    );

//
//  Define Mdl-based routines for the server to call
//

typedef
BOOLEAN
(*PFAST_IO_MDL_READ) (
    IN struct _FILE_OBJECT *FileObject,
    IN PLARGE_INTEGER FileOffset,
    IN ULONG Length,
    IN ULONG LockKey,
    OUT PMDL *MdlChain,
    OUT PIO_STATUS_BLOCK IoStatus,
    IN struct _DEVICE_OBJECT *DeviceObject
    );

typedef
BOOLEAN
(*PFAST_IO_MDL_READ_COMPLETE) (
    IN struct _FILE_OBJECT *FileObject,
    IN PMDL MdlChain,
    IN struct _DEVICE_OBJECT *DeviceObject
    );

typedef
BOOLEAN
(*PFAST_IO_PREPARE_MDL_WRITE) (
    IN struct _FILE_OBJECT *FileObject,
    IN PLARGE_INTEGER FileOffset,
    IN ULONG Length,
    IN ULONG LockKey,
    OUT PMDL *MdlChain,
    OUT PIO_STATUS_BLOCK IoStatus,
    IN struct _DEVICE_OBJECT *DeviceObject
    );

typedef
BOOLEAN
(*PFAST_IO_MDL_WRITE_COMPLETE) (
    IN struct _FILE_OBJECT *FileObject,
    IN PLARGE_INTEGER FileOffset,
    IN PMDL MdlChain,
    IN struct _DEVICE_OBJECT *DeviceObject
    );

//
//  If this routine is present, it will be called by FsRtl
//  to acquire the file for the mapped page writer.
//

typedef
NTSTATUS
(*PFAST_IO_ACQUIRE_FOR_MOD_WRITE) (
    IN struct _FILE_OBJECT *FileObject,
    IN PLARGE_INTEGER EndingOffset,
    OUT struct _ERESOURCE **ResourceToRelease,
    IN struct _DEVICE_OBJECT *DeviceObject
             );

typedef
NTSTATUS
(*PFAST_IO_RELEASE_FOR_MOD_WRITE) (
    IN struct _FILE_OBJECT *FileObject,
    IN struct _ERESOURCE *ResourceToRelease,
    IN struct _DEVICE_OBJECT *DeviceObject
             );

//
//  If this routine is present, it will be called by FsRtl
//  to acquire the file for the mapped page writer.
//

typedef
NTSTATUS
(*PFAST_IO_ACQUIRE_FOR_CCFLUSH) (
    IN struct _FILE_OBJECT *FileObject,
    IN struct _DEVICE_OBJECT *DeviceObject
             );

typedef
NTSTATUS
(*PFAST_IO_RELEASE_FOR_CCFLUSH) (
    IN struct _FILE_OBJECT *FileObject,
    IN struct _DEVICE_OBJECT *DeviceObject
             );

typedef
BOOLEAN
(*PFAST_IO_READ_COMPRESSED) (
    IN struct _FILE_OBJECT *FileObject,
    IN PLARGE_INTEGER FileOffset,
    IN ULONG Length,
    IN ULONG LockKey,
    OUT PVOID Buffer,
    OUT PMDL *MdlChain,
    OUT PIO_STATUS_BLOCK IoStatus,
    OUT struct _COMPRESSED_DATA_INFO *CompressedDataInfo,
    IN ULONG CompressedDataInfoLength,
    IN struct _DEVICE_OBJECT *DeviceObject
    );

typedef
BOOLEAN
(*PFAST_IO_WRITE_COMPRESSED) (
    IN struct _FILE_OBJECT *FileObject,
    IN PLARGE_INTEGER FileOffset,
    IN ULONG Length,
    IN ULONG LockKey,
    IN PVOID Buffer,
    OUT PMDL *MdlChain,
    OUT PIO_STATUS_BLOCK IoStatus,
    IN struct _COMPRESSED_DATA_INFO *CompressedDataInfo,
    IN ULONG CompressedDataInfoLength,
    IN struct _DEVICE_OBJECT *DeviceObject
    );

typedef
BOOLEAN
(*PFAST_IO_MDL_READ_COMPLETE_COMPRESSED) (
    IN struct _FILE_OBJECT *FileObject,
    IN PMDL MdlChain,
    IN struct _DEVICE_OBJECT *DeviceObject
    );

typedef
BOOLEAN
(*PFAST_IO_MDL_WRITE_COMPLETE_COMPRESSED) (
    IN struct _FILE_OBJECT *FileObject,
    IN PLARGE_INTEGER FileOffset,
    IN PMDL MdlChain,
    IN struct _DEVICE_OBJECT *DeviceObject
    );

typedef
BOOLEAN
(*PFAST_IO_QUERY_OPEN) (
    IN struct _IRP *Irp,
    OUT PFILE_NETWORK_OPEN_INFORMATION NetworkInformation,
    IN struct _DEVICE_OBJECT *DeviceObject
    );

//
// Define the structure to describe the Fast I/O dispatch routines.  Any
// additions made to this structure MUST be added monotonically to the end
// of the structure, and fields CANNOT be removed from the middle.
//

typedef struct _FAST_IO_DISPATCH {
    ULONG SizeOfFastIoDispatch;
    PFAST_IO_CHECK_IF_POSSIBLE FastIoCheckIfPossible;
    PFAST_IO_READ FastIoRead;
    PFAST_IO_WRITE FastIoWrite;
    PFAST_IO_QUERY_BASIC_INFO FastIoQueryBasicInfo;
    PFAST_IO_QUERY_STANDARD_INFO FastIoQueryStandardInfo;
    PFAST_IO_LOCK FastIoLock;
    PFAST_IO_UNLOCK_SINGLE FastIoUnlockSingle;
    PFAST_IO_UNLOCK_ALL FastIoUnlockAll;
    PFAST_IO_UNLOCK_ALL_BY_KEY FastIoUnlockAllByKey;
    PFAST_IO_DEVICE_CONTROL FastIoDeviceControl;
    PFAST_IO_ACQUIRE_FILE AcquireFileForNtCreateSection;
    PFAST_IO_RELEASE_FILE ReleaseFileForNtCreateSection;
    PFAST_IO_DETACH_DEVICE FastIoDetachDevice;
    PFAST_IO_QUERY_NETWORK_OPEN_INFO FastIoQueryNetworkOpenInfo;
    PFAST_IO_ACQUIRE_FOR_MOD_WRITE AcquireForModWrite;
    PFAST_IO_MDL_READ MdlRead;
    PFAST_IO_MDL_READ_COMPLETE MdlReadComplete;
    PFAST_IO_PREPARE_MDL_WRITE PrepareMdlWrite;
    PFAST_IO_MDL_WRITE_COMPLETE MdlWriteComplete;
    PFAST_IO_READ_COMPRESSED FastIoReadCompressed;
    PFAST_IO_WRITE_COMPRESSED FastIoWriteCompressed;
    PFAST_IO_MDL_READ_COMPLETE_COMPRESSED MdlReadCompleteCompressed;
    PFAST_IO_MDL_WRITE_COMPLETE_COMPRESSED MdlWriteCompleteCompressed;
    PFAST_IO_QUERY_OPEN FastIoQueryOpen;
    PFAST_IO_RELEASE_FOR_MOD_WRITE ReleaseForModWrite;
    PFAST_IO_ACQUIRE_FOR_CCFLUSH AcquireForCcFlush;
    PFAST_IO_RELEASE_FOR_CCFLUSH ReleaseForCcFlush;
} FAST_IO_DISPATCH, *PFAST_IO_DISPATCH;

// end_ntddk

// begin_ntddk begin_nthal
//
// Define the actions that a driver execution routine may request of the
// adapter/controller allocation routines upon return.
//

typedef enum _IO_ALLOCATION_ACTION {
    KeepObject = 1,
    DeallocateObject,
    DeallocateObjectKeepRegisters
} IO_ALLOCATION_ACTION, *PIO_ALLOCATION_ACTION;

//
// Define device driver adapter/controller execution routine.
//

typedef
IO_ALLOCATION_ACTION
(*PDRIVER_CONTROL) (
    IN struct _DEVICE_OBJECT *DeviceObject,
    IN struct _IRP *Irp,
    IN PVOID MapRegisterBase,
    IN PVOID Context
    );

// end_ntddk end_nthal end_ntifs

//
// Define the I/O system's structure for a connected interrupt.  This is
// useful for connecting an ISR to several different processors.
//

typedef struct _IO_INTERRUPT_STRUCTURE {
    KINTERRUPT InterruptObject;
    PKINTERRUPT InterruptArray[MAXIMUM_PROCESSORS];
    KSPIN_LOCK SpinLock;
} IO_INTERRUPT_STRUCTURE, *PIO_INTERRUPT_STRUCTURE;

// begin_ntddk begin_ntifs
//
// Define the I/O system's security context type for use by file system's
// when checking access to volumes, files, and directories.
//

typedef struct _IO_SECURITY_CONTEXT {
    PSECURITY_QUALITY_OF_SERVICE SecurityQos;
    PACCESS_STATE AccessState;
    ACCESS_MASK DesiredAccess;
    ULONG FullCreateOptions;
} IO_SECURITY_CONTEXT, *PIO_SECURITY_CONTEXT;

// end_ntddk end_ntifs

//
// Define the I/O system's version of a timer.
//

typedef struct _IO_TIMER {
    CSHORT Type;
    CSHORT TimerFlag;
    LIST_ENTRY TimerList;
    PIO_TIMER_ROUTINE TimerRoutine;
    PVOID Context;
    struct _DEVICE_OBJECT *DeviceObject;
} IO_TIMER, *PIO_TIMER;

// begin_ntddk begin_nthal begin_ntifs
//
// Define Volume Parameter Block (VPB) flags.
//

#define VPB_MOUNTED                     0x00000001
#define VPB_LOCKED                      0x00000002
#define VPB_PERSISTENT                  0x00000004

//
// Volume Parameter Block (VPB)
//

#define MAXIMUM_VOLUME_LABEL_LENGTH  (32 * sizeof(WCHAR)) // 32 characters

typedef struct _VPB {
    CSHORT Type;
    CSHORT Size;
    USHORT Flags;
    USHORT VolumeLabelLength; // in bytes
    struct _DEVICE_OBJECT *DeviceObject;
    struct _DEVICE_OBJECT *RealDevice;
    ULONG SerialNumber;
    ULONG ReferenceCount;
    WCHAR VolumeLabel[MAXIMUM_VOLUME_LABEL_LENGTH / sizeof(WCHAR)];
} VPB, *PVPB;

//
// Define object type specific fields of various objects used by the I/O system
//

typedef struct _ADAPTER_OBJECT *PADAPTER_OBJECT; // ntndis

//
// Define Wait Context Block (WCB)
//

typedef struct _WAIT_CONTEXT_BLOCK {
    KDEVICE_QUEUE_ENTRY WaitQueueEntry;
    PDRIVER_CONTROL DeviceRoutine;
    PVOID DeviceContext;
    ULONG NumberOfMapRegisters;
    PVOID DeviceObject;
    PVOID CurrentIrp;
    PKDPC BufferChainingDpc;
} WAIT_CONTEXT_BLOCK, *PWAIT_CONTEXT_BLOCK;

typedef struct _CONTROLLER_OBJECT {
    CSHORT Type;
    CSHORT Size;
    PVOID ControllerExtension;
    KDEVICE_QUEUE DeviceWaitQueue;

    ULONG Spare1;
    LARGE_INTEGER Spare2;

} CONTROLLER_OBJECT, *PCONTROLLER_OBJECT;


//
// Define Device Object (DO) flags
//

#define DO_VERIFY_VOLUME                0x00000002
#define DO_BUFFERED_IO                  0x00000004
#define DO_EXCLUSIVE                    0x00000008
#define DO_DIRECT_IO                    0x00000010
#define DO_MAP_IO_BUFFER                0x00000020
#define DO_DEVICE_HAS_NAME              0x00000040
#define DO_DEVICE_INITIALIZING          0x00000080
#define DO_SYSTEM_BOOT_PARTITION        0x00000100
#define DO_LONG_TERM_REQUESTS           0x00000200
#define DO_NEVER_LAST_DEVICE            0x00000400
#define DO_SHUTDOWN_REGISTERED          0x00000800

//
// Device Object structure definition
//

typedef struct _DEVICE_OBJECT {
    CSHORT Type;
    USHORT Size;
    LONG ReferenceCount;
    struct _DRIVER_OBJECT *DriverObject;
    struct _DEVICE_OBJECT *NextDevice;
    struct _DEVICE_OBJECT *AttachedDevice;
    struct _IRP *CurrentIrp;
    PIO_TIMER Timer;
    ULONG Flags;                                // See above:  DO_...
    ULONG Characteristics;                      // See ntioapi:  FILE_...
    PVPB Vpb;
    PVOID DeviceExtension;
    DEVICE_TYPE DeviceType;
    CCHAR StackSize;
    union {
        LIST_ENTRY ListEntry;
        WAIT_CONTEXT_BLOCK Wcb;
    } Queue;
    ULONG AlignmentRequirement;
    KDEVICE_QUEUE DeviceQueue;
    KDPC Dpc;

    //
    //  The following field is for exclusive use by the filesystem to keep
    //  track of the number of Fsp threads currently using the device
    //

    ULONG ActiveThreadCount;
    PSECURITY_DESCRIPTOR SecurityDescriptor;
    KEVENT DeviceLock;

    USHORT SectorSize;
    USHORT Spare1;

    struct _DEVOBJ_EXTENSION  *DeviceObjectExtension;
    PVOID  Reserved;
} DEVICE_OBJECT;
typedef struct _DEVICE_OBJECT *PDEVICE_OBJECT; // ntndis


//
// Define the Device Object Extension Flags
//

#define DOE_UNLOAD_PENDING              0x00000001
#define DOE_DELETE_PENDING              0x00000002

typedef struct _DEVOBJ_EXTENSION {

    //
    //
    //

    CSHORT          Type;
    USHORT          Size;

    //
    // Public part of the DeviceObjectExtension structure
    //

    PDEVICE_OBJECT  DeviceObject;               // owning device object

#ifdef _PNP_POWER_

    //
    // Shared Power Management fields
    //

    ULONG           IdleCount;                  // SHARED field via PoSetDeviceBusy()
    POWER_STATE     CurrentPowerState;
    ULONG           CurrentDevicePowerState;
    BOOLEAN         StartIoQueueHolding;        // PO & IO
    BOOLEAN         UseAsyncPowerUp;
    BOOLEAN         PowerControlNeeded;
    BOOLEAN         PowerControlPagable;

    //
    // Note: any new shared fields get added here.
    //


// end_ntddk end_nthal end_ntifs

    //
    // Internal fields for the DeviceObjectExtension.  These fields
    // are not exported outside the system and no driver or filesystem
    // will touch them.
    //

    //
    // Internal Power Management fields
    //

    // holding queue for StartIO
    KDEVICE_QUEUE   DeviceHoldingQueue;

    // power state information
    LIST_ENTRY      PowerStateChange;
    POWER_STATE     PendingPowerState;
    ULONG           PendingDevicePowerState;
    BOOLEAN         SetPowerUpPending;
    struct _IRP     *CurrentSetPowerIrp; // shared between PO & IO

    // suspend/hibernate
    LIST_ENTRY      AllDeviceObjects;
    BOOLEAN         Suspending;

    // idle state information
    LIST_ENTRY      IdleList;
    ULONG           MaxIdleCount;

// begin_ntddk begin_nthal begin_ntifs

#endif // _PNP_POWER_

    //
    // Device object extension flags.  Protected by the IopDatabaseLock.
    //

    ULONG ExtensionFlags;

} DEVOBJ_EXTENSION, *PDEVOBJ_EXTENSION;

//
// Define Driver Object (DRVO) flags
//

#define DRVO_UNLOAD_INVOKED             0x00000001

typedef struct _DRIVER_EXTENSION {

    //
    // Back pointer to Driver Object
    //

    struct _DRIVER_OBJECT *DriverObject;

    //
    // The AddDevice entry point is called by the Plug & Play manager
    // to inform the driver when a new device instance arrives that this
    // driver must control.
    //

    PDRIVER_ADD_DEVICE AddDevice;

    //
    // The count field is used to count the number of times the driver has
    // had its registered reinitialization routine invoked.
    //

    ULONG Count;

    //
    // The service name field is used by the pnp manager to determine
    // where the driver related info is stored in the registry.
    //

    UNICODE_STRING ServiceKeyName;

} DRIVER_EXTENSION, *PDRIVER_EXTENSION;

typedef struct _DRIVER_OBJECT {
    CSHORT Type;
    CSHORT Size;

    //
    // The following links all of the devices created by a single driver
    // together on a list, and the Flags word provides an extensible flag
    // location for driver objects.
    //

    PDEVICE_OBJECT DeviceObject;
    ULONG Flags;

    //
    // The following section describes where the driver is loaded.  The count
    // field is used to count the number of times the driver has had its
    // registered reinitialization routine invoked.
    //

    PVOID DriverStart;
    ULONG DriverSize;
    PVOID DriverSection;
    PDRIVER_EXTENSION DriverExtension;

    //
    // The driver name field is used by the error log thread
    // determine the name of the driver that an I/O request is/was bound.
    //

    UNICODE_STRING DriverName;

    //
    // The following section is for registry support.  Thise is a pointer
    // to the path to the hardware information in the registry
    //

    PUNICODE_STRING HardwareDatabase;

    //
    // The following section contains the optional pointer to an array of
    // alternate entry points to a driver for "fast I/O" support.  Fast I/O
    // is performed by invoking the driver routine directly with separate
    // parameters, rather than using the standard IRP call mechanism.  Note
    // that these functions may only be used for synchronous I/O, and when
    // the file is cached.
    //

    PFAST_IO_DISPATCH FastIoDispatch;

    //
    // The following section describes the entry points to this particular
    // driver.  Note that the major function dispatch table must be the last
    // field in the object so that it remains extensible.
    //

    PDRIVER_INITIALIZE DriverInit;
    PDRIVER_STARTIO DriverStartIo;
    PDRIVER_UNLOAD DriverUnload;
    PDRIVER_DISPATCH MajorFunction[IRP_MJ_MAXIMUM_FUNCTION + 1];

} DRIVER_OBJECT;
typedef struct _DRIVER_OBJECT *PDRIVER_OBJECT; // ntndis


// end_ntddk end_ntifs

//
// Device Handler Object.   There is one of these objects per PnP
// device.  This object is given to the device driver as a PVOID
// and is used by the driver to refer to a particular device.
//

typedef struct _DEVICE_HANDLER_OBJECT {
    CSHORT Type;
    USHORT Size;

    //
    // Indentifies which bus extender this device handler
    // object is associated with
    //

    struct _BUS_HANDLER *BusHandler;

    //
    // The associated SlotNumber for this device handler
    //

    ULONG SlotNumber;

// end_nthal

    //
    // System internal fields
    //

    //
    // Pnp stuff
    //

    UNICODE_STRING ServiceKeyName;
    ULONG InstanceOrdinal;

// begin_nthal


} DEVICE_HANDLER_OBJECT, *PDEVICE_HANDLER_OBJECT;

// begin_ntddk begin_ntifs

//
// The following structure is pointed to by the SectionObject pointer field
// of a file object, and is allocated by the various NT file systems.
//

typedef struct _SECTION_OBJECT_POINTERS {
    PVOID DataSectionObject;
    PVOID SharedCacheMap;
    PVOID ImageSectionObject;
} SECTION_OBJECT_POINTERS;
typedef SECTION_OBJECT_POINTERS *PSECTION_OBJECT_POINTERS;

//
// Define the format of a completion message.
//

typedef struct _IO_COMPLETION_CONTEXT {
    PVOID Port;
    ULONG Key;
} IO_COMPLETION_CONTEXT, *PIO_COMPLETION_CONTEXT;

//
// Define File Object (FO) flags
//

#define FO_FILE_OPEN                    0x00000001
#define FO_SYNCHRONOUS_IO               0x00000002
#define FO_ALERTABLE_IO                 0x00000004
#define FO_NO_INTERMEDIATE_BUFFERING    0x00000008
#define FO_WRITE_THROUGH                0x00000010
#define FO_SEQUENTIAL_ONLY              0x00000020
#define FO_CACHE_SUPPORTED              0x00000040
#define FO_NAMED_PIPE                   0x00000080
#define FO_STREAM_FILE                  0x00000100
#define FO_MAILSLOT                     0x00000200
#define FO_GENERATE_AUDIT_ON_CLOSE      0x00000400
#define FO_DIRECT_DEVICE_OPEN           0x00000800
#define FO_FILE_MODIFIED                0x00001000
#define FO_FILE_SIZE_CHANGED            0x00002000
#define FO_CLEANUP_COMPLETE             0x00004000
#define FO_TEMPORARY_FILE               0x00008000
#define FO_DELETE_ON_CLOSE              0x00010000
#define FO_OPENED_CASE_SENSITIVE        0x00020000
#define FO_HANDLE_CREATED               0x00040000
#define FO_FILE_FAST_IO_READ            0x00080000
#define FO_FILE_OLE_ACCESS              0x00100000

typedef struct _FILE_OBJECT {
    CSHORT Type;
    CSHORT Size;
    PDEVICE_OBJECT DeviceObject;
    PVPB Vpb;
    PVOID FsContext;
    PVOID FsContext2;
    PSECTION_OBJECT_POINTERS SectionObjectPointer;
    PVOID PrivateCacheMap;
    NTSTATUS FinalStatus;
    struct _FILE_OBJECT *RelatedFileObject;
    BOOLEAN LockOperation;
    BOOLEAN DeletePending;
    BOOLEAN ReadAccess;
    BOOLEAN WriteAccess;
    BOOLEAN DeleteAccess;
    BOOLEAN SharedRead;
    BOOLEAN SharedWrite;
    BOOLEAN SharedDelete;
    ULONG Flags;
    UNICODE_STRING FileName;
    LARGE_INTEGER CurrentByteOffset;
    ULONG Waiters;
    ULONG Busy;
    PVOID LastLock;
    KEVENT Lock;
    KEVENT Event;
    PIO_COMPLETION_CONTEXT CompletionContext;
} FILE_OBJECT;
typedef struct _FILE_OBJECT *PFILE_OBJECT; // ntndis

//
// Define I/O Request Packet (IRP) flags
//

#define IRP_NOCACHE                     0x00000001
#define IRP_PAGING_IO                   0x00000002
#define IRP_MOUNT_COMPLETION            0x00000002
#define IRP_SYNCHRONOUS_API             0x00000004
#define IRP_ASSOCIATED_IRP              0x00000008
#define IRP_BUFFERED_IO                 0x00000010
#define IRP_DEALLOCATE_BUFFER           0x00000020
#define IRP_INPUT_OPERATION             0x00000040
#define IRP_SYNCHRONOUS_PAGING_IO       0x00000040
#define IRP_CREATE_OPERATION            0x00000080
#define IRP_READ_OPERATION              0x00000100
#define IRP_WRITE_OPERATION             0x00000200
#define IRP_CLOSE_OPERATION             0x00000400
#define IRP_DEFER_IO_COMPLETION         0x00000800
#define IRP_OB_QUERY_NAME               0x00001000
#define IRP_HOLD_DEVICE_QUEUE           0x00002000

//
// Define I/O request packet (IRP) alternate flags for allocation control.
//

#define IRP_QUOTA_CHARGED               0x01
#define IRP_ALLOCATED_MUST_SUCCEED      0x02
#define IRP_ALLOCATED_FIXED_SIZE        0x04

//
// I/O Request Packet (IRP) definition
//

typedef struct _IRP {
    CSHORT Type;
    USHORT Size;

    //
    // Define the common fields used to control the IRP.
    //

    //
    // Define a pointer to the Memory Descriptor List (MDL) for this I/O
    // request.  This field is only used if the I/O is "direct I/O".
    //

    PMDL MdlAddress;

    //
    // Flags word - used to remember various flags.
    //

    ULONG Flags;

    //
    // The following union is used for one of three purposes:
    //
    //    1. This IRP is an associated IRP.  The field is a pointer to a master
    //       IRP.
    //
    //    2. This is the master IRP.  The field is the count of the number of
    //       IRPs which must complete (associated IRPs) before the master can
    //       complete.
    //
    //    3. This operation is being buffered and the field is the address of
    //       the system space buffer.
    //

    union {
        struct _IRP *MasterIrp;
        LONG IrpCount;
        PVOID SystemBuffer;
    } AssociatedIrp;

    //
    // Thread list entry - allows queueing the IRP to the thread pending I/O
    // request packet list.
    //

    LIST_ENTRY ThreadListEntry;

    //
    // I/O status - final status of operation.
    //

    IO_STATUS_BLOCK IoStatus;

    //
    // Requestor mode - mode of the original requestor of this operation.
    //

    KPROCESSOR_MODE RequestorMode;

    //
    // Pending returned - TRUE if pending was initially returned as the
    // status for this packet.
    //

    BOOLEAN PendingReturned;

    //
    // Stack state information.
    //

    CHAR StackCount;
    CHAR CurrentLocation;

    //
    // Cancel - packet has been canceled.
    //

    BOOLEAN Cancel;

    //
    // Cancel Irql - Irql at which the cancel spinlock was acquired.
    //

    KIRQL CancelIrql;

    //
    // ApcEnvironment - Used to save the APC environment at the time that the
    // packet was initialized.
    //

    CCHAR ApcEnvironment;

    //
    // Allocation control flags.
    //

    UCHAR AllocationFlags;

    //
    // User parameters.
    //

    PIO_STATUS_BLOCK UserIosb;
    PKEVENT UserEvent;
    union {
        struct {
            PIO_APC_ROUTINE UserApcRoutine;
            PVOID UserApcContext;
        } AsynchronousParameters;
        LARGE_INTEGER AllocationSize;
    } Overlay;

    //
    // CancelRoutine - Used to contain the address of a cancel routine supplied
    // by a device driver when the IRP is in a cancelable state.
    //

    PDRIVER_CANCEL CancelRoutine;

    //
    // Note that the UserBuffer parameter is outside of the stack so that I/O
    // completion can copy data back into the user's address space without
    // having to know exactly which service was being invoked.  The length
    // of the copy is stored in the second half of the I/O status block. If
    // the UserBuffer field is NULL, then no copy is performed.
    //

    PVOID UserBuffer;

    //
    // Kernel structures
    //
    // The following section contains kernel structures which the IRP needs
    // in order to place various work information in kernel controller system
    // queues.  Because the size and alignment cannot be controlled, they are
    // placed here at the end so they just hang off and do not affect the
    // alignment of other fields in the IRP.
    //

    union {

        struct {

            union {

                //
                // DeviceQueueEntry - The device queue entry field is used to
                // queue the IRP to the device driver device queue.
                //

                KDEVICE_QUEUE_ENTRY DeviceQueueEntry;

                struct {

                    //
                    // The following are available to the driver to use in
                    // whatever manner is desired, while the driver owns the
                    // packet.
                    //

                    PVOID DriverContext[4];

                } ;

            } ;

            //
            // Thread - pointer to caller's Thread Control Block.
            //

            PETHREAD Thread;

            //
            // Auxiliary buffer - pointer to any auxiliary buffer that is
            // required to pass information to a driver that is not contained
            // in a normal buffer.
            //

            PCHAR AuxiliaryBuffer;

            //
            // List entry - used to queue the packet to completion queue, among
            // others.
            //

            LIST_ENTRY ListEntry;

            //
            // Current stack location - contains a pointer to the current
            // IO_STACK_LOCATION structure in the IRP stack.  This field
            // should never be directly accessed by drivers.  They should
            // use the standard functions.
            //

            struct _IO_STACK_LOCATION *CurrentStackLocation;

            //
            // Original file object - pointer to the original file object
            // that was used to open the file.  This field is owned by the
            // I/O system and should not be used by any other drivers.
            //

            PFILE_OBJECT OriginalFileObject;

        } Overlay;

        //
        // APC - This APC control block is used for the special kernel APC as
        // well as for the caller's APC, if one was specified in the original
        // argument list.  If so, then the APC is reused for the normal APC for
        // whatever mode the caller was in and the "special" routine that is
        // invoked before the APC gets control simply deallocates the IRP.
        //

        KAPC Apc;

        //
        // CompletionKey - This is the key that is used to distinguish
        // individual I/O operations initiated on a single file handle.
        //

        ULONG CompletionKey;

    } Tail;

} IRP, *PIRP;

//
// Define completion routine types for use in stack locations in an IRP
//

typedef
NTSTATUS
(*PIO_COMPLETION_ROUTINE) (
    IN PDEVICE_OBJECT DeviceObject,
    IN PIRP Irp,
    IN PVOID Context
    );

//
// Define stack location control flags
//

#define SL_PENDING_RETURNED             0x01
#define SL_INVOKE_ON_CANCEL             0x20
#define SL_INVOKE_ON_SUCCESS            0x40
#define SL_INVOKE_ON_ERROR              0x80

//
// Define flags for various functions
//

//
// Create / Create Named Pipe
//
// The following flags must exactly match those in the IoCreateFile call's
// options.  The case sensitive flag is added in later, by the parse routine,
// and is not an actual option to open.  Rather, it is part of the object
// manager's attributes structure.
//

#define SL_FORCE_ACCESS_CHECK           0x01
#define SL_OPEN_PAGING_FILE             0x02
#define SL_OPEN_TARGET_DIRECTORY        0x04

#define SL_CASE_SENSITIVE               0x80

//
// Read / Write
//

#define SL_KEY_SPECIFIED                0x01
#define SL_OVERRIDE_VERIFY_VOLUME       0x02
#define SL_WRITE_THROUGH                0x04
#define SL_FT_SEQUENTIAL_WRITE          0x08

//
// Device I/O Control
//
//
// Same SL_OVERRIDE_VERIFY_VOLUME as for read/write above.
//

//
// Lock
//

#define SL_FAIL_IMMEDIATELY             0x01
#define SL_EXCLUSIVE_LOCK               0x02

//
// QueryDirectory / QueryEa
//

#define SL_RESTART_SCAN                 0x01
#define SL_RETURN_SINGLE_ENTRY          0x02
#define SL_INDEX_SPECIFIED              0x04

//
// NotifyDirectory
//

#define SL_WATCH_TREE                   0x01

//
// FileSystemControl
//
//    minor: mount/verify volume
//

#define SL_ALLOW_RAW_MOUNT              0x01

//
// Define I/O Request Packet (IRP) stack locations
//

#if !defined(_ALPHA_)
#include "pshpack4.h"
#endif
typedef struct _IO_STACK_LOCATION {
    UCHAR MajorFunction;
    UCHAR MinorFunction;
    UCHAR Flags;
    UCHAR Control;

    //
    // The following user parameters are based on the service that is being
    // invoked.  Drivers and file systems can determine which set to use based
    // on the above major and minor function codes.
    //

    union {

        //
        // System service parameters for:  NtCreateFile
        //

        struct {
            PIO_SECURITY_CONTEXT SecurityContext;
            ULONG Options;
            USHORT FileAttributes;
            USHORT ShareAccess;
            ULONG EaLength;
        } Create;

// end_ntddk end_nthal

        //
        // System service parameters for:  NtCreateNamedPipeFile
        //
        // Notice that the fields in the following parameter structure must
        // match those for the create structure other than the last longword.
        // This is so that no distinctions need be made by the I/O system's
        // parse routine other than for the last longword.
        //

        struct {
            PIO_SECURITY_CONTEXT SecurityContext;
            ULONG Options;
            USHORT Reserved;
            USHORT ShareAccess;
            PNAMED_PIPE_CREATE_PARAMETERS Parameters;
        } CreatePipe;

        //
        // System service parameters for:  NtCreateMailslotFile
        //
        // Notice that the fields in the following parameter structure must
        // match those for the create structure other than the last longword.
        // This is so that no distinctions need be made by the I/O system's
        // parse routine other than for the last longword.
        //

        struct {
            PIO_SECURITY_CONTEXT SecurityContext;
            ULONG Options;
            USHORT Reserved;
            USHORT ShareAccess;
            PMAILSLOT_CREATE_PARAMETERS Parameters;
        } CreateMailslot;

// begin_ntddk begin_nthal

        //
        // System service parameters for:  NtReadFile
        //

        struct {
            ULONG Length;
            ULONG Key;
            LARGE_INTEGER ByteOffset;
        } Read;

        //
        // System service parameters for:  NtWriteFile
        //

        struct {
            ULONG Length;
            ULONG Key;
            LARGE_INTEGER ByteOffset;
        } Write;

// end_ntddk end_nthal

        //
        // System service parameters for:  NtQueryDirectoryFile
        //

        struct {
            ULONG Length;
            PSTRING FileName;
            FILE_INFORMATION_CLASS FileInformationClass;
            ULONG FileIndex;
        } QueryDirectory;

        //
        // System service parameters for:  NtNotifyChangeDirectoryFile
        //

        struct {
            ULONG Length;
            ULONG CompletionFilter;
        } NotifyDirectory;

// begin_ntddk begin_nthal

        //
        // System service parameters for:  NtQueryInformationFile
        //

        struct {
            ULONG Length;
            FILE_INFORMATION_CLASS FileInformationClass;
        } QueryFile;

        //
        // System service parameters for:  NtSetInformationFile
        //

        struct {
            ULONG Length;
            FILE_INFORMATION_CLASS FileInformationClass;
            PFILE_OBJECT FileObject;
            union {
                struct {
                    BOOLEAN ReplaceIfExists;
                    BOOLEAN AdvanceOnly;
                };
                ULONG ClusterCount;
                HANDLE DeleteHandle;
            };
        } SetFile;

// end_ntddk end_nthal

        //
        // System service parameters for:  NtQueryEaFile
        //

        struct {
            ULONG Length;
            PVOID EaList;
            ULONG EaListLength;
            ULONG EaIndex;
        } QueryEa;

        //
        // System service parameters for:  NtSetEaFile
        //

        struct {
            ULONG Length;
        } SetEa;

// begin_ntddk begin_nthal

        //
        // System service parameters for:  NtQueryVolumeInformationFile
        //

        struct {
            ULONG Length;
            FS_INFORMATION_CLASS FsInformationClass;
        } QueryVolume;

// end_ntddk end_nthal

        //
        // System service parameters for:  NtSetVolumeInformationFile
        //

        struct {
            ULONG Length;
            FS_INFORMATION_CLASS FsInformationClass;
        } SetVolume;

        //
        // System service parameters for:  NtFsControlFile
        //
        // Note that the user's output buffer is stored in the UserBuffer field
        // and the user's input buffer is stored in the SystemBuffer field.
        //

        struct {
            ULONG OutputBufferLength;
            ULONG InputBufferLength;
            ULONG FsControlCode;
            PVOID Type3InputBuffer;
        } FileSystemControl;

        //
        // System service parameters for:  NtLockFile/NtUnlockFile
        //

        struct {
            PLARGE_INTEGER Length;
            ULONG Key;
            LARGE_INTEGER ByteOffset;
        } LockControl;

// begin_ntddk begin_nthal

        //
        // System service parameters for:  NtFlushBuffersFile
        //
        // No extra user-supplied parameters.
        //

// end_ntddk end_nthal

        //
        // System service parameters for:  NtCancelIoFile
        //
        // No extra user-supplied parameters.
        //

// begin_ntddk begin_nthal

        //
        // System service parameters for:  NtDeviceIoControlFile
        //
        // Note that the user's output buffer is stored in the UserBuffer field
        // and the user's input buffer is stored in the SystemBuffer field.
        //

        struct {
            ULONG OutputBufferLength;
            ULONG InputBufferLength;
            ULONG IoControlCode;
            PVOID Type3InputBuffer;
        } DeviceIoControl;

        //
        // System service parameters for:  NtQuerySecurityObject
        //

        struct {
            SECURITY_INFORMATION SecurityInformation;
            ULONG Length;
        } QuerySecurity;

        //
        // System service parameters for:  NtSetSecurityObject
        //

        struct {
            SECURITY_INFORMATION SecurityInformation;
            PSECURITY_DESCRIPTOR SecurityDescriptor;
        } SetSecurity;

        //
        // Non-system service parameters.
        //
        // Parameters for MountVolume
        //

        struct {
            PVPB Vpb;
            PDEVICE_OBJECT DeviceObject;
        } MountVolume;

        //
        // Parameters for VerifyVolume
        //

        struct {
            PVPB Vpb;
            PDEVICE_OBJECT DeviceObject;
        } VerifyVolume;

        //
        // Parameters for Scsi with internal device contorl.
        //

        struct {
            struct _SCSI_REQUEST_BLOCK *Srb;
        } Scsi;

#ifdef _PNP_POWER_
        //
        // Parameters for device power control.
        //

        struct {
            POWER_STATE PowerState;
            ULONG DevicePowerState;
        } SetPower;

        //
        // Parameters for device removal irp
        //

        struct {
            PDEVICE_OBJECT DeviceToRemove;
        } RemoveDevice;

#endif // _PNP_POWER_

        //
        // Parameters for StartDevice
        //

        struct {
            PCM_RESOURCE_LIST AllocatedResources;
        } StartDevice;

        //
        // Parameters for Cleanup
        //
        // No extra parameters supplied
        //

        //
        // Others - driver-specific
        //

        struct {
            PVOID Argument1;
            PVOID Argument2;
            PVOID Argument3;
            PVOID Argument4;
        } Others;

    } Parameters;

    //
    // Save a pointer to this device driver's device object for this request
    // so it can be passed to the completion routine if needed.
    //

    PDEVICE_OBJECT DeviceObject;

    //
    // The following location contains a pointer to the file object for this
    //

    PFILE_OBJECT FileObject;

    //
    // The following routine is invoked depending on the flags in the above
    // flags field.
    //

    PIO_COMPLETION_ROUTINE CompletionRoutine;

    //
    // The following is used to store the address of the context parameter
    // that should be passed to the CompletionRoutine.
    //

    PVOID Context;

} IO_STACK_LOCATION, *PIO_STACK_LOCATION;
#if !defined(_ALPHA_)
#include "poppack.h"
#endif

//
// Define the share access structure used by file systems to determine
// whether or not another accessor may open the file.
//

typedef struct _SHARE_ACCESS {
    ULONG OpenCount;
    ULONG Readers;
    ULONG Writers;
    ULONG Deleters;
    ULONG SharedRead;
    ULONG SharedWrite;
    ULONG SharedDelete;
} SHARE_ACCESS, *PSHARE_ACCESS;

// begin_nthal

//
// The following structure is used by drivers that are initializing to
// determine the number of devices of a particular type that have already
// been initialized.  It is also used to track whether or not the AtDisk
// address range has already been claimed.  Finally, it is used by the
// NtQuerySystemInformation system service to return device type counts.
//

typedef struct _CONFIGURATION_INFORMATION {

    //
    // This field indicates the total number of disks in the system.  This
    // number should be used by the driver to determine the name of new
    // disks.  This field should be updated by the driver as it finds new
    // disks.
    //

    ULONG DiskCount;                // Count of hard disks thus far
    ULONG FloppyCount;              // Count of floppy disks thus far
    ULONG CdRomCount;               // Count of CD-ROM drives thus far
    ULONG TapeCount;                // Count of tape drives thus far
    ULONG ScsiPortCount;            // Count of SCSI port adapters thus far
    ULONG SerialCount;              // Count of serial devices thus far
    ULONG ParallelCount;            // Count of parallel devices thus far

    //
    // These next two fields indicate ownership of one of the two IO address
    // spaces that are used by WD1003-compatable disk controllers.
    //

    BOOLEAN AtDiskPrimaryAddressClaimed;    // 0x1F0 - 0x1FF
    BOOLEAN AtDiskSecondaryAddressClaimed;  // 0x170 - 0x17F

} CONFIGURATION_INFORMATION, *PCONFIGURATION_INFORMATION;


// end_ntddk end_nthal

//
// The following are global counters used by the I/O system to indicate the
// amount of I/O being performed in the system.  The first three counters
// are just that, counts of operations that have been requested, while the
// last three counters track the amount of data transferred for each type
// of I/O request.
//

extern KSPIN_LOCK IoStatisticsLock;
extern ULONG IoReadOperationCount;
extern ULONG IoWriteOperationCount;
extern ULONG IoOtherOperationCount;
extern LARGE_INTEGER IoReadTransferCount;
extern LARGE_INTEGER IoWriteTransferCount;
extern LARGE_INTEGER IoOtherTransferCount;

//
// It is difficult for cached file systems to properly charge quota
// for the storage that they allocate on behalf of user file handles,
// so the following amount of additional quota is charged against each
// handle as a "best guess" as to the amount of quota the file system
// will allocate on behalf of this handle.
//

//
// These numbers are totally arbitrary, and can be changed if it turns out
// that the file systems actually allocate more (or less) on behalf of
// their file objects.  The non-paged pool charge constant is added to the
// size of a FILE_OBJECT to get the actual charge amount.
//

#define IO_FILE_OBJECT_NON_PAGED_POOL_CHARGE    64
#define IO_FILE_OBJECT_PAGED_POOL_CHARGE        1024


// begin_ntddk begin_nthal
//
// Public I/O routine definitions
//

NTKERNELAPI
VOID
IoAcquireCancelSpinLock(
    OUT PKIRQL Irql
    );

// end_ntddk end_nthal

NTKERNELAPI
VOID
IoAcquireVpbSpinLock(
    OUT PKIRQL Irql
    );

// begin_ntddk begin_nthal

NTKERNELAPI
NTSTATUS
IoAllocateAdapterChannel(
    IN PADAPTER_OBJECT AdapterObject,
    IN PDEVICE_OBJECT DeviceObject,
    IN ULONG NumberOfMapRegisters,
    IN PDRIVER_CONTROL ExecutionRoutine,
    IN PVOID Context
    );

NTKERNELAPI
VOID
IoAllocateController(
    IN PCONTROLLER_OBJECT ControllerObject,
    IN PDEVICE_OBJECT DeviceObject,
    IN PDRIVER_CONTROL ExecutionRoutine,
    IN PVOID Context
    );

NTKERNELAPI
PVOID
IoAllocateErrorLogEntry(
    IN PVOID IoObject,
    IN UCHAR EntrySize
    );

NTKERNELAPI
PIRP
IoAllocateIrp(
    IN CCHAR StackSize,
    IN BOOLEAN ChargeQuota
    );

NTKERNELAPI
PMDL
IoAllocateMdl(
    IN PVOID VirtualAddress,
    IN ULONG Length,
    IN BOOLEAN SecondaryBuffer,
    IN BOOLEAN ChargeQuota,
    IN OUT PIRP Irp OPTIONAL
    );

//++
//
// VOID
// IoAssignArcName(
//     IN PUNICODE_STRING ArcName,
//     IN PUNICODE_STRING DeviceName
//     )
//
// Routine Description:
//
//     This routine is invoked by drivers of bootable media to create a symbolic
//     link between the ARC name of their device and its NT name.  This allows
//     the system to determine which device in the system was actually booted
//     from since the ARC firmware only deals in ARC names, and NT only deals
//     in NT names.
//
// Arguments:
//
//     ArcName - Supplies the Unicode string representing the ARC name.
//
//     DeviceName - Supplies the name to which the ARCname refers.
//
// Return Value:
//
//     None.
//
//--

#define IoAssignArcName( ArcName, DeviceName ) (  \
    IoCreateSymbolicLink( (ArcName), (DeviceName) ) )

NTKERNELAPI
NTSTATUS
IoAssignResources (
    IN PUNICODE_STRING RegistryPath,
    IN PUNICODE_STRING DriverClassName OPTIONAL,
    IN PDRIVER_OBJECT DriverObject,
    IN PDEVICE_OBJECT DeviceObject OPTIONAL,
    IN PIO_RESOURCE_REQUIREMENTS_LIST RequestedResources,
    IN OUT PCM_RESOURCE_LIST *AllocatedResources
    );

// end_ntddk end_nthal

NTKERNELAPI
NTSTATUS
IoAsynchronousPageWrite(
    IN PFILE_OBJECT FileObject,
    IN PMDL MemoryDescriptorList,
    IN PLARGE_INTEGER StartingOffset,
    IN PIO_APC_ROUTINE ApcRoutine,
    IN PVOID ApcContext,
    OUT PIO_STATUS_BLOCK IoStatusBlock,
    OUT PIRP *Irp OPTIONAL
    );

// begin_ntddk begin_nthal

NTKERNELAPI
NTSTATUS
IoAttachDevice(
    IN PDEVICE_OBJECT SourceDevice,
    IN PUNICODE_STRING TargetDevice,
    OUT PDEVICE_OBJECT *AttachedDevice
    );

NTKERNELAPI
NTSTATUS
IoAttachDeviceByPointer(
    IN PDEVICE_OBJECT SourceDevice,
    IN PDEVICE_OBJECT TargetDevice
    );

PDEVICE_OBJECT
IoAttachDeviceToDeviceStack(
    IN PDEVICE_OBJECT SourceDevice,
    IN PDEVICE_OBJECT TargetDevice
    );

NTKERNELAPI
PIRP
IoBuildAsynchronousFsdRequest(
    IN ULONG MajorFunction,
    IN PDEVICE_OBJECT DeviceObject,
    IN OUT PVOID Buffer OPTIONAL,
    IN ULONG Length OPTIONAL,
    IN PLARGE_INTEGER StartingOffset OPTIONAL,
    IN PIO_STATUS_BLOCK IoStatusBlock OPTIONAL
    );

NTKERNELAPI
PIRP
IoBuildDeviceIoControlRequest(
    IN ULONG IoControlCode,
    IN PDEVICE_OBJECT DeviceObject,
    IN PVOID InputBuffer OPTIONAL,
    IN ULONG InputBufferLength,
    OUT PVOID OutputBuffer OPTIONAL,
    IN ULONG OutputBufferLength,
    IN BOOLEAN InternalDeviceIoControl,
    IN PKEVENT Event,
    OUT PIO_STATUS_BLOCK IoStatusBlock
    );

NTKERNELAPI
VOID
IoBuildPartialMdl(
    IN PMDL SourceMdl,
    IN OUT PMDL TargetMdl,
    IN PVOID VirtualAddress,
    IN ULONG Length
    );

NTKERNELAPI
PIRP
IoBuildSynchronousFsdRequest(
    IN ULONG MajorFunction,
    IN PDEVICE_OBJECT DeviceObject,
    IN OUT PVOID Buffer OPTIONAL,
    IN ULONG Length OPTIONAL,
    IN PLARGE_INTEGER StartingOffset OPTIONAL,
    IN PKEVENT Event,
    OUT PIO_STATUS_BLOCK IoStatusBlock
    );

NTKERNELAPI
NTSTATUS
FASTCALL
IofCallDriver(
    IN PDEVICE_OBJECT DeviceObject,
    IN OUT PIRP Irp
    );

#define IoCallDriver(a,b)   \
        IofCallDriver(a,b)

NTKERNELAPI
BOOLEAN
IoCancelIrp(
    IN PIRP Irp
    );

// end_ntddk end_nthal

NTKERNELAPI
VOID
IoCancelThreadIo(
    IN PETHREAD Thread
    );

NTKERNELAPI
NTSTATUS
IoCheckDesiredAccess(
    IN OUT PACCESS_MASK DesiredAccess,
    IN ACCESS_MASK GrantedAccess
    );

NTKERNELAPI
NTSTATUS
IoCheckEaBufferValidity(
    IN PFILE_FULL_EA_INFORMATION EaBuffer,
    IN ULONG EaLength,
    OUT PULONG ErrorOffset
    );

NTKERNELAPI
NTSTATUS
IoCheckFunctionAccess(
    IN ACCESS_MASK GrantedAccess,
    IN UCHAR MajorFunction,
    IN UCHAR MinorFunction,
    IN ULONG IoControlCode,
    IN PFILE_INFORMATION_CLASS FileInformationClass OPTIONAL,
    IN PFS_INFORMATION_CLASS FsInformationClass OPTIONAL
    );

// begin_ntddk begin_nthal

NTKERNELAPI
NTSTATUS
IoCheckShareAccess(
    IN ACCESS_MASK DesiredAccess,
    IN ULONG DesiredShareAccess,
    IN OUT PFILE_OBJECT FileObject,
    IN OUT PSHARE_ACCESS ShareAccess,
    IN BOOLEAN Update
    );

NTKERNELAPI
VOID
FASTCALL
IofCompleteRequest(
    IN PIRP Irp,
    IN CCHAR PriorityBoost
    );

#define IoCompleteRequest(a,b)  \
        IofCompleteRequest(a,b)

NTKERNELAPI
NTSTATUS
IoConnectInterrupt(
    OUT PKINTERRUPT *InterruptObject,
    IN PKSERVICE_ROUTINE ServiceRoutine,
    IN PVOID ServiceContext,
    IN PKSPIN_LOCK SpinLock OPTIONAL,
    IN ULONG Vector,
    IN KIRQL Irql,
    IN KIRQL SynchronizeIrql,
    IN KINTERRUPT_MODE InterruptMode,
    IN BOOLEAN ShareVector,
    IN KAFFINITY ProcessorEnableMask,
    IN BOOLEAN FloatingSave
    );

NTKERNELAPI
PCONTROLLER_OBJECT
IoCreateController(
    IN ULONG Size
    );

NTKERNELAPI
NTSTATUS
IoCreateDevice(
    IN PDRIVER_OBJECT DriverObject,
    IN ULONG DeviceExtensionSize,
    IN PUNICODE_STRING DeviceName OPTIONAL,
    IN DEVICE_TYPE DeviceType,
    IN ULONG DeviceCharacteristics,
    IN BOOLEAN Exclusive,
    OUT PDEVICE_OBJECT *DeviceObject
    );

// end_ntddk end_nthal

NTKERNELAPI
NTSTATUS
IoCreateFile(
    OUT PHANDLE FileHandle,
    IN ACCESS_MASK DesiredAccess,
    IN POBJECT_ATTRIBUTES ObjectAttributes,
    OUT PIO_STATUS_BLOCK IoStatusBlock,
    IN PLARGE_INTEGER AllocationSize OPTIONAL,
    IN ULONG FileAttributes,
    IN ULONG ShareAccess,
    IN ULONG Disposition,
    IN ULONG CreateOptions,
    IN PVOID EaBuffer OPTIONAL,
    IN ULONG EaLength,
    IN CREATE_FILE_TYPE CreateFileType,
    IN PVOID ExtraCreateParameters OPTIONAL,
    IN ULONG Options
    );

NTKERNELAPI
PFILE_OBJECT
IoCreateStreamFileObject(
    IN PFILE_OBJECT FileObject OPTIONAL,
    IN PDEVICE_OBJECT DeviceObject OPTIONAL
    );

// begin_ntddk begin_nthal

NTKERNELAPI
PKEVENT
IoCreateNotificationEvent(
    IN PUNICODE_STRING EventName,
    OUT PHANDLE EventHandle
    );

NTKERNELAPI
NTSTATUS
IoCreateSymbolicLink(
    IN PUNICODE_STRING SymbolicLinkName,
    IN PUNICODE_STRING DeviceName
    );

NTKERNELAPI
PKEVENT
IoCreateSynchronizationEvent(
    IN PUNICODE_STRING EventName,
    OUT PHANDLE EventHandle
    );

NTKERNELAPI
NTSTATUS
IoCreateUnprotectedSymbolicLink(
    IN PUNICODE_STRING SymbolicLinkName,
    IN PUNICODE_STRING DeviceName
    );

//++
//
// VOID
// IoDeassignArcName(
//     IN PUNICODE_STRING ArcName
//     )
//
// Routine Description:
//
//     This routine is invoked by drivers to deassign an ARC name that they
//     created to a device.  This is generally only called if the driver is
//     deleting the device object, which means that the driver is probably
//     unloading.
//
// Arguments:
//
//     ArcName - Supplies the ARC name to be removed.
//
// Return Value:
//
//     None.
//
//--

#define IoDeassignArcName( ArcName ) (  \
    IoDeleteSymbolicLink( (ArcName) ) )

NTKERNELAPI
VOID
IoDeleteController(
    IN PCONTROLLER_OBJECT ControllerObject
    );

NTKERNELAPI
VOID
IoDeleteDevice(
    IN PDEVICE_OBJECT DeviceObject
    );

NTKERNELAPI
NTSTATUS
IoDeleteSymbolicLink(
    IN PUNICODE_STRING SymbolicLinkName
    );

NTKERNELAPI
VOID
IoDetachDevice(
    IN OUT PDEVICE_OBJECT TargetDevice
    );

NTKERNELAPI
VOID
IoDisconnectInterrupt(
    IN PKINTERRUPT InterruptObject
    );

// end_ntddk end_nthal

NTKERNELAPI
VOID
IoEnqueueIrp(
    IN PIRP Irp
    );

// begin_ntsrv

NTKERNELAPI
BOOLEAN
IoFastQueryNetworkAttributes(
    IN POBJECT_ATTRIBUTES ObjectAttributes,
    IN ACCESS_MASK DesiredAccess,
    IN ULONG OpenOptions,
    OUT PIO_STATUS_BLOCK IoStatus,
    OUT PFILE_NETWORK_OPEN_INFORMATION Buffer
    );

// end_ntsrv

// begin_ntddk begin_nthal

NTKERNELAPI
VOID
IoFreeController(
    IN PCONTROLLER_OBJECT ControllerObject
    );

NTKERNELAPI
VOID
IoFreeIrp(
    IN PIRP Irp
    );

NTKERNELAPI
VOID
IoFreeMdl(
    IN PMDL Mdl
    );

// end_ntddk end_nthal

NTKERNELAPI
PDEVICE_OBJECT
IoGetAttachedDevice(
    IN PDEVICE_OBJECT DeviceObject
    );

NTKERNELAPI
PDEVICE_OBJECT
IoGetBaseFileSystemDeviceObject(
    IN PFILE_OBJECT FileObject
    );

NTKERNELAPI                                 // ntddk nthal
PCONFIGURATION_INFORMATION                  // ntddk nthal
IoGetConfigurationInformation( VOID );      // ntddk nthal

// begin_ntddk begin_nthal

//++
//
// PIO_STACK_LOCATION
// IoGetCurrentIrpStackLocation(
//     IN PIRP Irp
//     )
//
// Routine Description:
//
//     This routine is invoked to return a pointer to the current stack location
//     in an I/O Request Packet (IRP).
//
// Arguments:
//
//     Irp - Pointer to the I/O Request Packet.
//
// Return Value:
//
//     The function value is a pointer to the current stack location in the
//     packet.
//
//--

#define IoGetCurrentIrpStackLocation( Irp ) ( (Irp)->Tail.Overlay.CurrentStackLocation )

// end_nthal

NTKERNELAPI
PDEVICE_OBJECT
IoGetDeviceToVerify(
    IN PETHREAD Thread
    );

NTKERNELAPI
PEPROCESS
IoGetCurrentProcess(
    VOID
    );

// begin_nthal

NTKERNELAPI
NTSTATUS
IoGetDeviceObjectPointer(
    IN PUNICODE_STRING ObjectName,
    IN ACCESS_MASK DesiredAccess,
    OUT PFILE_OBJECT *FileObject,
    OUT PDEVICE_OBJECT *DeviceObject
    );

NTKERNELAPI
PGENERIC_MAPPING
IoGetFileObjectGenericMapping(
    VOID
    );

// end_nthal

//++
//
// ULONG
// IoGetFunctionCodeFromCtlCode(
//     IN ULONG ControlCode
//     )
//
// Routine Description:
//
//     This routine extracts the function code from IOCTL and FSCTL function
//     control codes.
//     This routine should only be used by kernel mode code.
//
// Arguments:
//
//     ControlCode - A function control code (IOCTL or FSCTL) from which the
//         function code must be extracted.
//
// Return Value:
//
//     The extracted function code.
//
// Note:
//
//     The CTL_CODE macro, used to create IOCTL and FSCTL function control
//     codes, is defined in ntioapi.h
//
//--

#define IoGetFunctionCodeFromCtlCode( ControlCode ) (\
    ( ControlCode >> 2) & 0x00000FFF )

// begin_nthal

NTKERNELAPI
PVOID
IoGetInitialStack(
    VOID
    );

NTKERNELAPI
VOID
IoGetStackLimits (
    OUT PULONG LowLimit,
    OUT PULONG HighLimit
    );


//
//  The following function is used to tell the caller how much stack is available
//

__inline
ULONG
IoGetRemainingStackSize (
    VOID
    )
{
    ULONG Top;
    ULONG Bottom;

    IoGetStackLimits( &Bottom, &Top );
    return((ULONG)(&Top) - Bottom );
}

//++
//
// PIO_STACK_LOCATION
// IoGetNextIrpStackLocation(
//     IN PIRP Irp
//     )
//
// Routine Description:
//
//     This routine is invoked to return a pointer to the next stack location
//     in an I/O Request Packet (IRP).
//
// Arguments:
//
//     Irp - Pointer to the I/O Request Packet.
//
// Return Value:
//
//     The function value is a pointer to the next stack location in the packet.
//
//--

#define IoGetNextIrpStackLocation( Irp ) (\
    (Irp)->Tail.Overlay.CurrentStackLocation - 1 )

NTKERNELAPI
PDEVICE_OBJECT
IoGetRelatedDeviceObject(
    IN PFILE_OBJECT FileObject
    );

// end_ntddk end_nthal

NTKERNELAPI
PEPROCESS
IoGetRequestorProcess(
    IN PIRP Irp
    );

NTKERNELAPI
PIRP
IoGetTopLevelIrp(
    VOID
    );

// begin_ntddk begin_nthal

//++
//
// VOID
// IoInitializeDpcRequest(
//     IN PDEVICE_OBJECT DeviceObject,
//     IN PIO_DPC_ROUTINE DpcRoutine
//     )
//
// Routine Description:
//
//     This routine is invoked to initialize the DPC in a device object for a
//     device driver during its initialization routine.  The DPC is used later
//     when the driver interrupt service routine requests that a DPC routine
//     be queued for later execution.
//
// Arguments:
//
//     DeviceObject - Pointer to the device object that the request is for.
//
//     DpcRoutine - Address of the driver's DPC routine to be executed when
//         the DPC is dequeued for processing.
//
// Return Value:
//
//     None.
//
//--

#define IoInitializeDpcRequest( DeviceObject, DpcRoutine ) (\
    KeInitializeDpc( &(DeviceObject)->Dpc,                  \
                     (PKDEFERRED_ROUTINE) (DpcRoutine),     \
                     (DeviceObject) ) )

NTKERNELAPI
VOID
IoInitializeIrp(
    IN OUT PIRP Irp,
    IN USHORT PacketSize,
    IN CCHAR StackSize
    );

NTKERNELAPI
NTSTATUS
IoInitializeTimer(
    IN PDEVICE_OBJECT DeviceObject,
    IN PIO_TIMER_ROUTINE TimerRoutine,
    IN PVOID Context
    );

// end_ntddk end_nthal end_ntifs

NTKERNELAPI
BOOLEAN
IoInitSystem(
    IN PLOADER_PARAMETER_BLOCK LoaderBlock
    );

// begin_ntddk begin_nthal begin_ntifs

//++
//
// BOOLEAN
// IoIsErrorUserInduced(
//     IN NTSTATUS Status
//     )
//
// Routine Description:
//
//     This routine is invoked to determine if an error was as a
//     result of user actions.  Typically these error are related
//     to removable media and will result in a pop-up.
//
// Arguments:
//
//     Status - The status value to check.
//
// Return Value:
//
//     The function value is TRUE if the user induced the error,
//     otherwise FALSE is returned.
//
//--
#define IoIsErrorUserInduced( Status ) ((BOOLEAN)  \
    (((Status) == STATUS_DEVICE_NOT_READY) ||      \
     ((Status) == STATUS_IO_TIMEOUT) ||            \
     ((Status) == STATUS_MEDIA_WRITE_PROTECTED) || \
     ((Status) == STATUS_NO_MEDIA_IN_DEVICE) ||    \
     ((Status) == STATUS_VERIFY_REQUIRED) ||       \
     ((Status) == STATUS_UNRECOGNIZED_MEDIA) ||    \
     ((Status) == STATUS_WRONG_VOLUME)))

// end_ntddk end_nthal

//++
//
// BOOLEAN
// IoIsFileOpenedExclusively(
//     IN PFILE_OBJECT FileObject
//     )
//
// Routine Description:
//
//     This routine is invoked to determine whether the file open represented
//     by the specified file object is opened exclusively.
//
// Arguments:
//
//     FileObject - Pointer to the file object that represents the open instance
//         of the target file to be tested for exclusive access.
//
// Return Value:
//
//     The function value is TRUE if the open instance of the file is exclusive;
//     otherwise FALSE is returned.
//
//--

#define IoIsFileOpenedExclusively( FileObject ) (\
    (BOOLEAN) !((FileObject)->SharedRead || (FileObject)->SharedWrite || (FileObject)->SharedDelete))

NTKERNELAPI
BOOLEAN
IoIsOperationSynchronous(
    IN PIRP Irp
    );

NTKERNELAPI
BOOLEAN
IoIsSystemThread(
    IN PETHREAD Thread
    );

// begin_ntddk begin_nthal

NTKERNELAPI
PIRP
IoMakeAssociatedIrp(
    IN PIRP Irp,
    IN CCHAR StackSize
    );

//++
//
// VOID
// IoMarkIrpPending(
//     IN OUT PIRP Irp
//     )
//
// Routine Description:
//
//     This routine marks the specified I/O Request Packet (IRP) to indicate
//     that an initial status of STATUS_PENDING was returned to the caller.
//     This is used so that I/O completion can determine whether or not to
//     fully complete the I/O operation requested by the packet.
//
// Arguments:
//
//     Irp - Pointer to the I/O Request Packet to be marked pending.
//
// Return Value:
//
//     None.
//
//--

#define IoMarkIrpPending( Irp ) ( \
    IoGetCurrentIrpStackLocation( (Irp) )->Control |= SL_PENDING_RETURNED )

// end_ntddk end_nthal end_ntifs

NTKERNELAPI
BOOLEAN
IoPageFileCreated(
    IN HANDLE FileHandle
    );

NTKERNELAPI                                             // ntifs
NTSTATUS                                                // ntifs
IoPageRead(                                             // ntifs
    IN PFILE_OBJECT FileObject,                         // ntifs
    IN PMDL MemoryDescriptorList,                       // ntifs
    IN PLARGE_INTEGER StartingOffset,                   // ntifs
    IN PKEVENT Event,                                   // ntifs
    OUT PIO_STATUS_BLOCK IoStatusBlock                  // ntifs
    );                                                  // ntifs

NTKERNELAPI                                             // ntddk
NTSTATUS                                                // ntddk
IoQueryDeviceDescription(                               // ntddk
    IN PINTERFACE_TYPE BusType OPTIONAL,                // ntddk
    IN PULONG BusNumber OPTIONAL,                       // ntddk
    IN PCONFIGURATION_TYPE ControllerType OPTIONAL,     // ntddk
    IN PULONG ControllerNumber OPTIONAL,                // ntddk
    IN PCONFIGURATION_TYPE PeripheralType OPTIONAL,     // ntddk
    IN PULONG PeripheralNumber OPTIONAL,                // ntddk
    IN PIO_QUERY_DEVICE_ROUTINE CalloutRoutine,         // ntddk
    IN PVOID Context                                    // ntddk
    );                                                  // ntddk

// begin_ntifs

NTKERNELAPI
NTSTATUS
IoQueryFileInformation(
    IN PFILE_OBJECT FileObject,
    IN FILE_INFORMATION_CLASS FileInformationClass,
    IN ULONG Length,
    OUT PVOID FileInformation,
    OUT PULONG ReturnedLength
    );

NTKERNELAPI
NTSTATUS
IoQueryVolumeInformation(
    IN PFILE_OBJECT FileObject,
    IN FS_INFORMATION_CLASS FsInformationClass,
    IN ULONG Length,
    OUT PVOID FsInformation,
    OUT PULONG ReturnedLength
    );

// end_ntifs
// begin_ntsrv

NTKERNELAPI
VOID
IoQueueThreadIrp(
    IN PIRP Irp
    );

// end_ntsrv
// begin_ntddk begin_nthal begin_ntifs

NTKERNELAPI
VOID
IoRaiseHardError(
    IN PIRP Irp,
    IN PVPB Vpb OPTIONAL,
    IN PDEVICE_OBJECT RealDeviceObject
    );

NTKERNELAPI
BOOLEAN
IoRaiseInformationalHardError(
    IN NTSTATUS ErrorStatus,
    IN PUNICODE_STRING String OPTIONAL,
    IN PKTHREAD Thread OPTIONAL
    );

NTKERNELAPI
BOOLEAN
IoSetThreadHardErrorMode(
    IN BOOLEAN EnableHardErrors
    );

NTKERNELAPI
VOID
IoRegisterDriverReinitialization(
    IN PDRIVER_OBJECT DriverObject,
    IN PDRIVER_REINITIALIZE DriverReinitializationRoutine,
    IN PVOID Context
    );

// end_ntddk end_nthal

NTKERNELAPI
VOID
IoRegisterFileSystem(
    IN OUT PDEVICE_OBJECT DeviceObject
    );

NTKERNELAPI
NTSTATUS
IoRegisterFsRegistrationChange(
    IN PDRIVER_OBJECT DriverObject,
    IN PDRIVER_FS_NOTIFICATION DriverNotificationRoutine
    );

// begin_ntddk begin_nthal

NTKERNELAPI
NTSTATUS
IoRegisterShutdownNotification(
    IN PDEVICE_OBJECT DeviceObject
    );

NTKERNELAPI
VOID
IoReleaseCancelSpinLock(
    IN KIRQL Irql
    );

#if _PNP_POWER_

NTKERNELAPI
VOID
IoHoldDeviceQueue (
    IN PDEVICE_OBJECT DeviceObject,
    IN struct _IRP *Irp
    );

NTKERNELAPI
VOID
IoReleaseStartIoHoldingQueue (
    IN PDEVICE_OBJECT DeviceObject
    );

#endif

// end_ntddk end_nthal

NTKERNELAPI
VOID
IoReleaseVpbSpinLock(
    IN KIRQL Irql
    );

// begin_ntddk begin_nthal

NTKERNELAPI
VOID
IoRemoveShareAccess(
    IN PFILE_OBJECT FileObject,
    IN OUT PSHARE_ACCESS ShareAccess
    );

// end_ntddk end_ntifs

NTKERNELAPI
NTSTATUS
IoReportHalResourceUsage(
    IN PUNICODE_STRING HalName,
    IN PCM_RESOURCE_LIST RawResourceList,
    IN PCM_RESOURCE_LIST TranslatedResourceList,
    IN ULONG ResourceListSize
    );

// begin_ntddk begin_ntifs

NTKERNELAPI
NTSTATUS
IoReportResourceUsage(
    IN PUNICODE_STRING DriverClassName OPTIONAL,
    IN PDRIVER_OBJECT DriverObject,
    IN PCM_RESOURCE_LIST DriverList OPTIONAL,
    IN ULONG DriverListSize OPTIONAL,
    IN PDEVICE_OBJECT DeviceObject,
    IN PCM_RESOURCE_LIST DeviceList OPTIONAL,
    IN ULONG DeviceListSize OPTIONAL,
    IN BOOLEAN OverrideConflict,
    OUT PBOOLEAN ConflictDetected
    );

//++
//
// VOID
// IoRequestDpc(
//     IN PDEVICE_OBJECT DeviceObject,
//     IN PIRP Irp,
//     IN PVOID Context
//     )
//
// Routine Description:
//
//     This routine is invoked by the device driver's interrupt service routine
//     to request that a DPC routine be queued for later execution at a lower
//     IRQL.
//
// Arguments:
//
//     DeviceObject - Device object for which the request is being processed.
//
//     Irp - Pointer to the current I/O Request Packet (IRP) for the specified
//         device.
//
//     Context - Provides a general context parameter to be passed to the
//         DPC routine.
//
// Return Value:
//
//     None.
//
//--

#define IoRequestDpc( DeviceObject, Irp, Context ) ( \
    KeInsertQueueDpc( &(DeviceObject)->Dpc, (Irp), (Context) ) )

//++
//
// PDRIVER_CANCEL
// IoSetCancelRoutine(
//     IN PIRP Irp,
//     IN PDRIVER_CANCEL CancelRoutine
//     )
//
// Routine Description:
//
//     This routine is invoked to set the address of a cancel routine which
//     is to be invoked when an I/O packet has been canceled.
//
// Arguments:
//
//     Irp - Pointer to the I/O Request Packet itself.
//
//     CancelRoutine - Address of the cancel routine that is to be invoked
//         if the IRP is cancelled.
//
// Return Value:
//
//     Previous value of CancelRoutine field in the IRP.
//
//--

#define IoSetCancelRoutine( Irp, NewCancelRoutine ) (  \
    (PDRIVER_CANCEL) InterlockedExchange( (PLONG) &(Irp)->CancelRoutine, (LONG) (NewCancelRoutine) ) )

//++
//
// VOID
// IoSetCompletionRoutine(
//     IN PIRP Irp,
//     IN PIO_COMPLETION_ROUTINE CompletionRoutine,
//     IN PVOID Context,
//     IN BOOLEAN InvokeOnSuccess,
//     IN BOOLEAN InvokeOnError,
//     IN BOOLEAN InvokeOnCancel
//     )
//
// Routine Description:
//
//     This routine is invoked to set the address of a completion routine which
//     is to be invoked when an I/O packet has been completed by a lower-level
//     driver.
//
// Arguments:
//
//     Irp - Pointer to the I/O Request Packet itself.
//
//     CompletionRoutine - Address of the completion routine that is to be
//         invoked once the next level driver completes the packet.
//
//     Context - Specifies a context parameter to be passed to the completion
//         routine.
//
//     InvokeOnSuccess - Specifies that the completion routine is invoked when the
//         operation is successfully completed.
//
//     InvokeOnError - Specifies that the completion routine is invoked when the
//         operation completes with an error status.
//
//     InvokeOnCancel - Specifies that the completion routine is invoked when the
//         operation is being canceled.
//
// Return Value:
//
//     None.
//
//--

#define IoSetCompletionRoutine( Irp, Routine, CompletionContext, Success, Error, Cancel ) { \
    PIO_STACK_LOCATION irpSp;                                               \
    ASSERT( (Success) | (Error) | (Cancel) ? (Routine) != NULL : TRUE );    \
    irpSp = IoGetNextIrpStackLocation( (Irp) );                             \
    irpSp->CompletionRoutine = (Routine);                                   \
    irpSp->Context = (CompletionContext);                                   \
    irpSp->Control = 0;                                                     \
    if ((Success)) { irpSp->Control = SL_INVOKE_ON_SUCCESS; }               \
    if ((Error)) { irpSp->Control |= SL_INVOKE_ON_ERROR; }                  \
    if ((Cancel)) { irpSp->Control |= SL_INVOKE_ON_CANCEL; } }

// end_ntddk end_nthal

NTKERNELAPI
VOID
IoSetDeviceToVerify(
    IN PETHREAD Thread,
    IN PDEVICE_OBJECT DeviceObject
    );

// begin_ntddk begin_nthal

NTKERNELAPI
VOID
IoSetHardErrorOrVerifyDevice(
    IN PIRP Irp,
    IN PDEVICE_OBJECT DeviceObject
    );

// end_ntddk end_nthal

NTKERNELAPI
NTSTATUS
IoSetInformation(
    IN PFILE_OBJECT FileObject,
    IN FILE_INFORMATION_CLASS FileInformationClass,
    IN ULONG Length,
    IN PVOID FileInformation
    );

// begin_ntddk begin_nthal

//++
//
// VOID
// IoSetNextIrpStackLocation (
//     IN OUT PIRP Irp
//     )
//
// Routine Description:
//
//     This routine is invoked to set the current IRP stack location to
//     the next stack location, i.e. it "pushes" the stack.
//
// Arguments:
//
//     Irp - Pointer to the I/O Request Packet (IRP).
//
// Return Value:
//
//     None.
//
//--

#define IoSetNextIrpStackLocation( Irp ) {      \
    (Irp)->CurrentLocation--;                   \
    (Irp)->Tail.Overlay.CurrentStackLocation--; }

NTKERNELAPI
VOID
IoSetShareAccess(
    IN ACCESS_MASK DesiredAccess,
    IN ULONG DesiredShareAccess,
    IN OUT PFILE_OBJECT FileObject,
    OUT PSHARE_ACCESS ShareAccess
    );

// end_ntddk end_nthal

NTKERNELAPI
VOID
IoSetTopLevelIrp(
    IN PIRP Irp
    );

// end_ntifs

NTKERNELAPI
BOOLEAN
IoShutdownSystem(
    IN BOOLEAN RebootPending,
    IN ULONG Phase
    );

// begin_ntddk begin_nthal begin_ntifs

//++
//
// USHORT
// IoSizeOfIrp(
//     IN CCHAR StackSize
//     )
//
// Routine Description:
//
//     Determines the size of an IRP given the number of stack locations
//     the IRP will have.
//
// Arguments:
//
//     StackSize - Number of stack locations for the IRP.
//
// Return Value:
//
//     Size in bytes of the IRP.
//
//--

#define IoSizeOfIrp( StackSize ) \
    ((USHORT) (sizeof( IRP ) + ((StackSize) * (sizeof( IO_STACK_LOCATION )))))

NTKERNELAPI
VOID
IoStartNextPacket(
    IN PDEVICE_OBJECT DeviceObject,
    IN BOOLEAN Cancelable
    );

NTKERNELAPI
VOID
IoStartNextPacketByKey(
    IN PDEVICE_OBJECT DeviceObject,
    IN BOOLEAN Cancelable,
    IN ULONG Key
    );

NTKERNELAPI
VOID
IoStartPacket(
    IN PDEVICE_OBJECT DeviceObject,
    IN PIRP Irp,
    IN PULONG Key OPTIONAL,
    IN PDRIVER_CANCEL CancelFunction OPTIONAL
    );

NTKERNELAPI
VOID
IoStartTimer(
    IN PDEVICE_OBJECT DeviceObject
    );

NTKERNELAPI
VOID
IoStopTimer(
    IN PDEVICE_OBJECT DeviceObject
    );

// end_ntddk end_nthal

NTKERNELAPI
NTSTATUS
IoSynchronousPageWrite(
    IN PFILE_OBJECT FileObject,
    IN PMDL MemoryDescriptorList,
    IN PLARGE_INTEGER StartingOffset,
    IN PKEVENT Event,
    OUT PIO_STATUS_BLOCK IoStatusBlock
    );

NTKERNELAPI
PEPROCESS
IoThreadToProcess(
    IN PETHREAD Thread
    );

NTKERNELAPI
VOID
IoUnregisterFileSystem(
    IN OUT PDEVICE_OBJECT DeviceObject
    );

NTKERNELAPI
VOID
IoUnregisterFsRegistrationChange(
    IN PDRIVER_OBJECT DriverObject,
    IN PDRIVER_FS_NOTIFICATION DriverNotificationRoutine
    );

// begin_ntddk begin_nthal

NTKERNELAPI
VOID
IoUnregisterShutdownNotification(
    IN PDEVICE_OBJECT DeviceObject
    );

NTKERNELAPI
VOID
IoUpdateShareAccess(
    IN PFILE_OBJECT FileObject,
    IN OUT PSHARE_ACCESS ShareAccess
    );

// end_ntddk end_nthal

NTKERNELAPI
NTSTATUS
IoVerifyVolume(
    IN PDEVICE_OBJECT DeviceObject,
    IN BOOLEAN AllowRawMount
    );

NTKERNELAPI
BOOLEAN
IoWriteCrashDump(
    IN ULONG BugCheckCode,
    IN ULONG BugCheckParameter1,
    IN ULONG BugCheckParameter2,
    IN ULONG BugCheckParameter3,
    IN ULONG BugCheckParameter4,
    IN PVOID Context
    );

NTKERNELAPI                                     // ntddk nthal
VOID                                            // ntddk nthal
IoWriteErrorLogEntry(                           // ntddk nthal
    IN PVOID ElEntry                            // ntddk nthal
    );                                          // ntddk nthal

//end_ntifs

#endif // _IO_