FS impl.

[Warner Losh]

>   I have been trying to write my own UFS-like filesystem
> implementation for fun. I had read somewhere that UFS was developed in
> user space (correct me if I'm wrong on that one) and then moved over
> to kernel-space. I was wondering if there are any existing facilities
> in the kernel source tree that would allow me to develop an fs in user
> space easily or with a little tweaking? As of right now, I have to
> develop, compile, panic, reboot, debug etc. which is frustrating and
> time consuming.

Maybe you are thinking of NFS :-).  You can use the same hooks that
amd and similar programs to implement your code in userland.

Warner