PFNKSFASTHANDLER - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// ks.h

PFNKSFASTHANDLER Pfnksfasthandler;

BOOLEAN Pfnksfasthandler(
  [in]      PFILE_OBJECT FileObject,
  [in]      PKSIDENTIFIER Request,
  [in]      ULONG RequestLength,
  [in, out] PVOID Data,
  [in]      ULONG DataLength,
  [out]     PIO_STATUS_BLOCK IoStatus
)
{...}

View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (nc-ks-pfnksfasthandler)

PFNKSFASTHANDLER callback function

Description

KStrFastHandler is a driver-supplied routine that handles a property or method request without the creation of an IRP.

Parameters

FileObject [in]

Specifies the file object on which the request was made.

Request [in]

Specifies the original property parameter. This will always be on FILE_LONG_ALIGNMENT, but cannot be on FILE_QUAD_ALIGNMENT.

RequestLength [in]

Specifies the length indicated by the caller of the property parameter.

Data [in, out]

Specifies the original unaligned data parameter.

DataLength [in]

Specifies the length indicated by the caller of the data parameter.

IoStatus [out]

Specifies an aligned structure that is used to return error status and information. This information is then copied to the original I/O status structure on completion.

Return value

KStrFastHandler returns TRUE if the call was handled. If the call was not handled, it returns FALSE and an IRP is generated to handle the request.

Remarks

The minidriver provides an entry point for this routine in KSFASTPROPERTY_ITEM or KSFASTMETHOD_ITEM.

View the official Windows Driver Kit DDI reference

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