DEVICE_DSM_OFFLOAD_READ_PARAMETERS structure (ntddstor.h)
The DEVICE_DSM_OFFLOAD_READ_PARAMETERS structure specifies the parameters for an offload read action related to the data-set attributes for a device.
Syntax
typedef struct _DEVICE_DSM_OFFLOAD_READ_PARAMETERS {
ULONG Flags;
ULONG TimeToLive;
ULONG Reserved[2];
} DEVICE_DSM_OFFLOAD_READ_PARAMETERS, *PDEVICE_DSM_OFFLOAD_READ_PARAMETERS;
Members
Flags
Not used. Set to 0.
TimeToLive
The duration, in milliseconds, for which the requested data ranges should remain valid.
Reserved[2]
Reserved.
Remarks
This structure is used in an offload read action for an IOCTL_STORAGE_MANAGE_DATA_SET_ATTRIBUTES request. The Action member of the DEVICE_DSM_INPUT structure is set to DeviceDsmAction_OffloadRead.
The ParameterBlockOffset and ParameterBlockLength members of DEVICE_DSM_INPUT structure are set to the location and length of the DEVICE_DSM_OFFLOAD_READ_PARAMETERS structure in the input buffer of the IOCTL_STORAGE_MANAGE_DATA_SET_ATTRIBUTES request.
The DataSetRangesOffset and DataSetRangesLength members of DEVICE_DSM_INPUT specify the DEVICE_DSM_RANGE structures for the extents of the offload read.
See DEVICE_DSM_ACTION Descriptions for more details about this action.
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_ACTION Descriptions