Re: [PATCH] nfsd: default to kernel default for minorversion 1

J. Bruce Fields
2010-02-12T20:05:16Z

On Fri, Feb 12, 2010 at 02:58:23PM -0500, Steve Dickson wrote:
>
>
> On 02/05/2010 03:05 PM, J. Bruce Fields wrote:
> > From: J. Bruce Fields <bfields@citi.umich.edu>
> >
> > The current kernel code should not be enabled by default, because it
> > does not yet attempt to be a conform completely to the rfc; for example,
> > some required pieces of protocol are missing.
> >
> > Therefore the kernel defaults to leaving minorversion1 off. When the
> > code matures sufficiently, that default will change.
> >
> > That kernel default becomes meaningless if nfs-utils always explicitly
> > turns 4.1 on or off. So, nfs-utils should by default do nothing.
> >
> > Early adopters that want to turn on NFSv4.1 explicitly can still do so
> > using
> >
> > echo "+4.1" >/proc/fs/nfsd/versions
> >
> When I write to /proc/fs/nfsd/versions I'm getting
> write error: Device or resource busy
>
> What did you do to make the file writeable?

You just need to do it before starting nfsd.

So if it's just a one-off experiment you could

/etc/init.d/nfs-server stop
echo "+4.1" >/proc/fs/nsfd/versions
/etc/init.d/nfs-server start

On machines where I was using 4.1 regularly I'd probably at a line to
the init script, or to a local init script that ran before it.

--b.