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DeviceDsmGetOutputBlockLength function (ntddstor.h)

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The DeviceDsmGetOutputBlockLength function gets the length, in bytes, of a data set management (DSM) output block.

Syntax

ULONG DeviceDsmGetOutputBlockLength(
  PDEVICE_DSM_DEFINITION Definition,
  ULONG                  OutputLength
);

Parameters

Definition

Pointer to a DEVICE_DSM_DEFINITION structure that defines the operation.

OutputLength

The length, in bytes, of the entire output (the DEVICE_DSM_OUTPUT output buffer plus the output block).

Return value

Returns the length, in bytes, of the output block.

Remarks

See Data Set Management Overview for information on how to set up and process a DSM action.

Requirements

Requirement Value
Minimum supported client Windows 10, version 1803
Target Platform Universal
Header ntddstor.h

See also

Data Set Management Overview

DEVICE_DSM_DEFINITION

DEVICE_DSM_OUTPUT