STORAGE_OFFLOAD_WRITE_OUTPUT structure (ntddstor.h)

The STORAGE_OFFLOAD_WRITE_OUTPUT structure is the output of an IOCTL_STORAGE_MANAGE_DATA_SET_ATTRIBUTES control code request when the Action member of DEVICE_DSM_INPUT is set to DeviceDsmAction_OffloadWrite.

Syntax

typedef struct _STORAGE_OFFLOAD_WRITE_OUTPUT {
  ULONG     OffloadWriteFlags;
  ULONG     Reserved;
  ULONGLONG LengthCopied;
} STORAGE_OFFLOAD_WRITE_OUTPUT, *PSTORAGE_OFFLOAD_WRITE_OUTPUT;

Members

OffloadWriteFlags

Flags indicating the result of the offload write operation. This is set to one of the following.

Value	Meaning
STORAGE_OFFLOAD_WRITE_RANGE_TRUNCATED	The offload write was performed but the range written was truncated.
STORAGE_OFFLOAD_TOKEN_INVALID	The token provided for the offload write operation was invalid.

Reserved

Reserved.

LengthCopied

Bytes copied for the write request in DEVICE_DSM_OFFLOAD_WRITE_PARAMETERS.

Remarks

On input, a token value in DEVICE_DSM_OFFLOAD_WRITE_PARAMETERS uniquely identifies the data set ranges requested for writing in the DEVICE_DSM_INPUT structure. The STORAGE_OFFLOAD_WRITE_OUTPUT structure contains the results of the write operation.

The STORAGE_OFFLOAD_WRITE_OUTPUT structure is returned at the beginning of the system buffer.

Requirements

Requirement	Value
Minimum supported client	Available in Windows 8 and later versions of Windows.
Header	ntddstor.h (include Ntddstor.h)

See also

DEVICE_DSM_INPUT

DEVICE_DSM_OFFLOAD_WRITE_PARAMETERS

IOCTL_STORAGE_MANAGE_DATA_SET_ATTRIBUTES