Re: nfs4 mounts failing with 3.6.0-rc1

From: Jeff Layton <jlayton@redhat.com>
To: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Bryan Schumaker <bjschuma@netapp.com>, linux-nfs@vger.kernel.org
Subject: Re: nfs4 mounts failing with 3.6.0-rc1
Date: Tue, 7 Aug 2012 13:09:32 -0400	[thread overview]
Message-ID: <20120807130932.79625d7e@tlielax.poochiereds.net> (raw)
In-Reply-To: <20120804190104.GA2135@fieldses.org>

On Sat, 4 Aug 2012 15:01:04 -0400
"J. Bruce Fields" <bfields@fieldses.org> wrote:

> On Fri, Aug 03, 2012 at 10:00:39PM -0400, Jeff Layton wrote:
> > On Fri, 3 Aug 2012 20:08:19 -0400
> > "J. Bruce Fields" <bfields@fieldses.org> wrote:
> > 
> > > I'm getting
> > > 
> > > 	# mount -tnfs -onfsvers=4 pip1:/exports /mnt/
> > > 
> > > (OK, admittedly that's with 3.6.0-rc1 + a few experimental patches, but
> > > I doubt they're related.)
> > > 
> > > Also:
> > > 
> > > 	[root@pip2 ~]# modprobe nfs4
> > > 	[root@pip2 ~]# lsmod|grep nfs4
> > > 	[root@pip2 ~]# 
> > > 
> > > --b.
> > 
> > I hit the same problem...
> > 
> > Try removing /usr/lib/modprobe.d/nfs.conf (assuming you're running
> > Fedora).
> 
> Oog, right.
> 
> But, without testing--won't that make v4 mounts fail on older kernels?

Actually, now that I look, this does not seem to break on older kernels
as long as you use a syntax like:

    # mount -t nfs server:/export /mnt/point -o vers=4

...if, however you use a syntax like:

    # mount -t nfs4 server:/export /mnt/point

...then it fails without the above file in place. I guess the question
we have to answer is: Do we want to continue to support the "-t nfs4"
mount syntax?

-- 
Jeff Layton <jlayton@redhat.com>