_DEVICE_DSM_OFFLOAD_WRITE_PARAMETERS structure

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The DEVICE_DSM_OFFLOAD_WRITE_PARAMETERS structure specifies the parameters for an offload write action related to the data-set attributes for a device.

This parameter structure is used in an offload write action for an IOCTL_STORAGE_MANAGE_DATA_SET_ATTRIBUTES request. The Action member of the DEVICE_MANAGE_DATA_SET_ATTRIBUTES structure is set to DeviceDsmAction_OffloadWrite, and ParameterBlockOffset indicates the location of DEVICE_DSM_OFFLOAD_WRITE_PARAMETERS.

Syntax

typedef struct _DEVICE_DSM_OFFLOAD_WRITE_PARAMETERS {
  ULONG                 Flags;
  ULONG                 Reserved;
  ULONGLONG             TokenOffset;
  STORAGE_OFFLOAD_TOKEN Token;
} *PDEVICE_DSM_OFFLOAD_WRITE_PARAMETERS, DEVICE_DSM_OFFLOAD_WRITE_PARAMETERS;

Members

Flags

Not used.

Reserved

Reserved.

TokenOffset

The offset, in bytes, within the data block specified by Token to begin writing from.

Token

The unique identifier of the data block to write from.

Remarks

The ParameterBlockOffset and ParameterBlockLength members of DEVICE_MANAGE_DATA_SET_ATTRIBUTES are set to the location and length of the DEVICE_DSM_OFFLOAD_WRITE_PARAMETERS structure in the system buffer of the IOCTL_STORAGE_MANAGE_DATA_SET_ATTRIBUTES request.

The DataSetRangesOffset and DataSetRangesLength members of DEVICE_MANAGE_DATA_SET_ATTRIBUTES specify the DEVICE_DATA_SET_RANGE structures for the extents of the offload write.

Requirements

   
Windows version Available in Windows 8 and later versions of Windows. Available in Windows 8 and later versions of Windows.
Header ntddstor.h (include Ntddstor.h)

See Also

DEVICE_MANAGE_DATA_SET_ATTRIBUTES

IOCTL_STORAGE_MANAGE_DATA_SET_ATTRIBUTES