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Windows Driver Kit DDI reference (ns-mcd-_mcd_init_data)

_MCD_INIT_DATA structure

Description

The changer miniclass driver fills the MCD_INIT_DATA structure with pointers to its internal command processing routines and passes them to the changer class driver.

Members

`InitDataSize`

Size of this structure in bytes.

`ChangerAdditionalExtensionSize`

Pointer to changer miniclass driver routine that returns the number of bytes the changer miniclass driver requires to store device-specific information in the device extension. This routine has the following prototype:

typedef
ULONG
(*CHANGER_EXTENSION_SIZE)(
  IN VOID
  );

`ChangerInitialize`

Pointer to changer miniclass driver routine that does miniclass driver-specific initialization and readies the changer to receive other requests. This routine has the following prototype:

typedef
NTSTATUS
(*CHANGER_INITIALIZE)(
  IN PDEVICE_OBJECT  DeviceObject
  );

`ChangerError`

Pointer to changer miniclass driver routine that does device-specific error processing. This routine has the following prototype:

typedef
VOID
(*CHANGER_ERROR_ROUTINE)(
  IN PDEVICE_OBJECT  DeviceObject,
  IN PSCSI_REQUEST_BLOCK  Srb,
  IN NTSTATUS  *Status,
  IN BOOLEAN  *Retry
  );

`ChangerPerformDiagnostics`

Pointer to changer miniclass driver routine that performs diagnostic tests on the device. This routine has the following prototype:

typedef
NTSTATUS
(*CHANGER_PERFORM_DIAGNOSTICS)(
  IN PDEVICE_OBJECT  DeviceObject,
  OUT PWMI_CHANGER_PROBLEM_DEVICE_ERROR  changerDeviceError
  );

`ChangerGetParameters`

Pointer to changer miniclass driver routine that handles the device-specific aspects of a device-control IRP with the IOCTL code IOCTL_CHANGER_GET_PARAMETERS. This routine has the following prototype:

typedef
NTSTATUS
(*CHANGER_COMMAND_ROUTINE)(
  IN PDEVICE_OBJECT  DeviceObject,
  IN PIRP  Irp
  );

`ChangerGetStatus`

Pointer to changer miniclass driver routine that handles the device-specific aspects of a device-control IRP with the IOCTL code IOCTL_CHANGER_GET_STATUS. This routine has the following prototype:

typedef
NTSTATUS
(*CHANGER_COMMAND_ROUTINE)(
  IN PDEVICE_OBJECT  DeviceObject,
  IN PIRP  Irp
  );

`ChangerGetProductData`

Pointer to a changer miniclass driver routine that handles the device-specific aspects of a device-control IRP with the IOCTL code IOCTL_CHANGER_GET_PRODUCT_DATA. This routine has the following prototype:

typedef
NTSTATUS
(*CHANGER_COMMAND_ROUTINE)(
  IN PDEVICE_OBJECT  DeviceObject,
  IN PIRP  Irp
  );

`ChangerSetAccess`

Pointer to a changer miniclass driver routine that handles the device-specific aspects of a device-control IRP with the IOCTL code IOCTL_CHANGER_SET_ACCESS. This routine has the following prototype:

typedef
NTSTATUS
(*CHANGER_COMMAND_ROUTINE)(
  IN PDEVICE_OBJECT  DeviceObject,
  IN PIRP  Irp
  );

`ChangerGetElementStatus`

Pointer to a changer miniclass driver routine that handles the device-specific aspects of a device-control IRP with the IOCTL code IOCTL_CHANGER_GET_ELEMENT_STATUS. This routine has the following prototype:

typedef
NTSTATUS
(*CHANGER_COMMAND_ROUTINE)(
  IN PDEVICE_OBJECT  DeviceObject,
  IN PIRP  Irp
  );

`ChangerInitializeElementStatus`

Pointer to a changer miniclass driver routine that handles the device-specific aspects of a device-control IRP with the IOCTL code IOCTL_CHANGER_INITIALIZE_ELEMENT_STATUS. This routine has the following prototype:

typedef
NTSTATUS
(*CHANGER_COMMAND_ROUTINE)(
  IN PDEVICE_OBJECT  DeviceObject,
  IN PIRP  Irp
  );

`ChangerSetPosition`

Pointer to a changer miniclass driver routine that handles the device-specific aspects of a device-control IRP with the IOCTL code IOCTL_CHANGER_SET_POSITION. This routine has the following prototype:

typedef
NTSTATUS
(*CHANGER_COMMAND_ROUTINE)(
  IN PDEVICE_OBJECT  DeviceObject,
  IN PIRP  Irp
  );

`ChangerExchangeMedium`

Pointer to a changer miniclass driver routine that handles the device-specific aspects of a device-control IRP with the IOCTL code IOCTL_CHANGER_EXCHANGE_MEDIUM. This routine has the following prototype:

typedef
NTSTATUS
(*CHANGER_COMMAND_ROUTINE)(
  IN PDEVICE_OBJECT  DeviceObject,
  IN PIRP  Irp
  );

`ChangerMoveMedium`

Pointer to a changer miniclass driver routine that handles the device-specific aspects of a device-control IRP with the IOCTL code IOCTL_CHANGER_MOVE_MEDIUM. This routine has the following prototype:

typedef
NTSTATUS
(*CHANGER_COMMAND_ROUTINE)(
  IN PDEVICE_OBJECT  DeviceObject,
  IN PIRP  Irp
  );

`ChangerReinitializeUnit`

Pointer to a changer miniclass driver routine that handles the device-specific aspects of a device-control IRP with the IOCTL code IOCTL_CHANGER_REINITIALIZE_TRANSPORT. This routine has the following prototype:

typedef
NTSTATUS
(*CHANGER_COMMAND_ROUTINE)(
  IN PDEVICE_OBJECT  DeviceObject,
  IN PIRP  Irp
  );

`ChangerQueryVolumeTags`

Pointer to a changer miniclass driver routine that handles the device-specific aspects of a device-control IRP with the IOCTL code of IOCTL_CHANGER_QUERY_VOLUME_TAGS. This routine has the following prototype:

typedef
NTSTATUS
(*CHANGER_COMMAND_ROUTINE)(
  IN PDEVICE_OBJECT  DeviceObject,
  IN PIRP  Irp
  );

Remarks

This structure is used by the changer driver in Windows XP and later operating systems only.

MCD_INIT_DATA - NtDoc