StorPortGetOriginalMdl function (storport.h)

Article
10/21/2021

The StorPortGetOriginalMdl routine returns the MDL associated with the given SRB.

Syntax

ULONG StorPortGetOriginalMdl(
  [in]  PVOID               HwDeviceExtension,
  [in]  PSCSI_REQUEST_BLOCK Srb,
  [out] PVOID               *Mdl
);

Parameters

[in] HwDeviceExtension

A pointer to the hardware device extension for the host bus adapter (HBA).

[in] Srb

A pointer to a SCSI_REQUEST_BLOCK structure.

[out] Mdl

A pointer to receive the MDL.

Return value

StorPortGetOriginalMdl returns one of the following status codes:

Return code	Description
STOR_STATUS_NOT_IMPLEMENTED	This function is not implemented on the active operating system.
STOR_STATUS_SUCCESS	Indicates that the MDL was obtained successfully.
STOR_STATUS_INVALID_PARAMETER	The pointer in Mdl receiving the SRB's MDL is NULL.

Remarks

Starting in Windows 8, the Srb parameter may point to either SCSI_REQUEST_BLOCK or STORAGE_REQUEST_BLOCK. If the function identifier in the Function field of Srb is SRB_FUNCTION_STORAGE_REQUEST_BLOCK, the SRB is a STORAGE_REQUEST_BLOCK request structure.

Requirements

Requirement	Value
Target Platform	Universal
Header	storport.h (include Storport.h)