Re: 3.10-rc3 NFSv3 mount issues

["Myklebust, Trond" <Trond.Myklebust@netapp.com>]

On Thu, 2013-05-30 at 16:26 -0400, Chuck Lever wrote:
> On May 30, 2013, at 4:19 PM, Jim Schutt <jaschut@sandia.gov> wrote:
> 
> > Hi,
> > 
> > I've been trying to test 3.10-rc3 on some diskless clients, and found
> > that I can no longer mount my root file system via NFSv3.
> > 
> > I poked around looking at NFS changes for 3.10, and found these two
> > commits:
> > 
> > d497ab9751 "NFSv3: match sec= flavor against server list"
> > 4580a92d44 "NFS: Use server-recommended security flavor by default (NFSv3)"
> > 
> > If I revert both of these commits from 3.10-rc3, then my diskless
> > client can mount its root file system.
> > 
> > The busybox mount command fails like this, when using 3.10-rc3:
> > 
> > / # mount  -t nfs -o ro,nolock,vers=3,proto=tcp 172.17.0.122:/gmi/images/jaschut/ceph.toss-2x /mnt
> > mount: mounting 172.17.0.122:/gmi/images/jaschut/ceph.toss-2x on /mnt failed: Invalid argument
> > 
> > The commit messages for both these commits seem to say that mounting
> > with the "sys=sec" option should work, but unfortunately, my busybox doesn't
> > seem to understand the "sec=" mount option:
> > 
> > / # mount  -t nfs -o ro,nolock,vers=3,proto=tcp,sec=sys 172.17.0.122:/gmi/images/jaschut/ceph.toss-2x /mnt
> > mount: invalid number 'sys'
> > 
> > My NFS server is based on RHEL6, and is not using any "sec=" option
> > in its export for this file system.  I did try exporting with "sec=sys",
> > but it didn't seem to make any difference either.
> > 
> > So far, this seems like a regression to me ....
> > Any ideas what I might be doing wrong?  How can I
> > help make this work again?
> 
> 3.10-rc3 appears to be missing the fix for this.  See:
> 
>   http://marc.info/?l=linux-nfs&m=136855668104598&w=2
> 
> Trond, can we get this applied?
> 

For some reason it got lost in the mail heap. I've applied it now to the
'bugfixes' branch. Will push upstream in the next few days...

-- 
Trond Myklebust
Linux NFS client maintainer

NetApp
Trond.Myklebust@netapp.com
www.netapp.com