Re: regarding support of NFS versions

[Edgar Fuß <ef%math.uni-bonn.de@localhost>]

For a long time, I've been looking for an NFSv4 server for NetBSD, and, failing to find one, thinking about writing one.

Does anyone know more about NFSv4 than "largely improved NFS with Kerberos 
support"?
Does anyone know more about Kerberos that "centralized authentication 
service handing out signed authentication tickets for services"?

Is it possible to have a v4-only server or does some part of the protocol 
fall back to v3?

What I have in mind is to have a privilledged login process doing the 
authentication and forking off a worker process running under the 
logged in user's credentials and thus have the kernel do all nifty 
permission checking.

Is someone familiar enough with NFSv4/Kerberos to immediately point out 
to me why that can't possibly work?