Re: Stackable USB Driver

> My need is to monitor printer status conditions (not data itself) so that
> agents (help desk) outside the box can be notified when preventive
> intervention or replacement is required. In the Windows environment it is
> possible to insert a "filter driver" into the driver stack so that all of
> the status info can be monitored. I was looking for an analogous solution;
> vfs seemed promising, but it is not applicable to USB printer drivers.

In the Linux model this normally lives in user space. The traditional
printing stack puts only the code for moving bits around into the kernel.
It sounds like you should be looking at the user space printer driver
modules level (CUPS etc) and CUPS itself not in the kernel.

Alan

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