On Fri, Jan 9, 2009 at 2:05 AM, Roman V. Shaposhnik <r...@sun.com> wrote: > Multiplexing. If devices exposed channel interface, and got > exported there would be no kernel protecting from clients > sending random sequences of 9P messages (on a single host > you can't mount a channel and then continue reading/writing > 9P messages over it).
a year or so back i mentioned a way that this could be done, by having an "auth" (DMAUTH) file visible in the namespace representing the channel to be mounted. you can turn this file into a new namespace by opening it and handing it to an attach message (as the afid). i've probably still got a working inferno kernel that i modified to allow this, but i didn't take it any further. this mechanism *could* potentially be used to replace the # namespace.
