// ntddstor.h

ULONG DeviceDsmGetNumberOfDataSetRanges(
  PDEVICE_DSM_DEFINITION Definition,
  ULONG                  InputLength,
  ULONG                  ParameterBlockLength
);
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Windows Driver Kit DDI reference (nf-ntddstor-devicedsmgetnumberofdatasetranges)

DeviceDsmGetNumberOfDataSetRanges function

Description

The DeviceDsmGetNumberOfDataSetRanges function gets the number of data set ranges required for the specified data set management (DSM) operation.

Parameters

`Definition`

Pointer to a DEVICE_DSM_DEFINITION structure that defines the operation.

`InputLength`

The length, in bytes, of the entire input buffer.

`ParameterBlockLength`

The length, in bytes, of a parameter block.

Return value

DeviceDsmGetNumberOfDataSetRanges returns the number of data set ranges required for the specified operation. Each range is sizeof(DEVICE_DSM_RANGE).

Remarks

See Data Set Management for details on how to process a DSM.

DeviceDsmGetNumberOfDataSetRanges - NtDoc