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FsRtlQueryCachedVdl routine

The current valid data length (VDL) for a cached file is retrieved with the FsRtlQueryCachedVdl routine.

Syntax


NTSTATUS FsRtlQueryCachedVdl(
  _In_   PFILE_OBJECT FileObject,
  _Out_  PLONGLONG Vdl
);

Parameters

FileObject [in]

The file object to retrieve the cached VDL for.

Vdl [out]

A pointer to a caller supplied value which receives the VDL.

Return value

FsRtlQueryCachedVdl returns STATUS_SUCCESS if the cached VDL is obtained successfully for the FileObject specified. Otherwise, another appropriate NTSTATUS value is returned.

Remarks

The FsRtlQueryCachedVdl routine will return the VDL for a full span file region. This is a region beginning at an offset of 0 and having a length of MAXLONGLONG.

Requirements

Version

Available in starting with Windows 8.

Header

Ntifs.h (include Ntifs.h)

Library

Ntoskrnl.lib

IRQL

PASSIVE_LEVEL

 

 

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