Re: Multiple named filters
From: dave (dave_at_discussions.microsoft.com)
Date: 02/16/05
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Date: Wed, 16 Feb 2005 09:41:20 -0800
Thank you,
dave
"Calvin Guan" wrote:
> Make sure you have setup the device flags for NamedFilter_2 correctly. If
> you want to use buffered IO, you need to set the flag DO_BUFFERED_IO.
>
> --
> Calvin Guan Software Engineer/Radeon NT Drivers
> ATI Technologies Inc. Markham ON, Canada www.ati.com
>
> "dave" <dave@discussions.microsoft.com> wrote in message
> news:55DDCBF1-DBA4-424E-8DDA-6E41A13DB4B5@microsoft.com...
> >
> > Hello:
> >
> > I have upper filter above "serenum".
> > In Filter.AddDevice(...) I created named object "NamedFilter_1".
> > I can open/close and read/write to "NamedFilter_1"
> > from user-mode appl
> >
> >
> > In Filter.DriverEntry(...) I created named object "NamedFilter_2".
> >
> > Using the same user-mode appl I can open/close this object.
> >
> > But when I try to write to "NamedFilter_2" IRP_MJ_WRITE arrives with
> > stack->Parameters.Write.Length = 0 and
> > Irp->AssociatedIrp.SystemBuffer = NULL
> >
> >
> > Thank you,
> > dave
> >
>
>
>
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