linux-kernel - Re: 3.10-rc3 NFSv3 mount issues

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Date:	Thu, 30 May 2013 16:26:12 -0400
From:	Chuck Lever <chuck.lever@...cle.com>
To:	Jim Schutt <jaschut@...dia.gov>,
	Trond Myklebust <Trond.Myklebust@...app.com>
Cc:	Weston Andros Adamson <dros@...app.com>,
	Linux NFS Mailing List <linux-nfs@...r.kernel.org>,
	LKML Kernel <linux-kernel@...r.kernel.org>
Subject: Re: 3.10-rc3 NFSv3 mount issues


On May 30, 2013, at 4:19 PM, Jim Schutt <jaschut@...dia.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?

-- 
Chuck Lever
chuck[dot]lever[at]oracle[dot]com




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