From: Open Source <opensource3141@yahoo.com>
Subject: Re: "mount: File exists" when trying to mount a second krb5
	volume!
Date: Thu, 16 Nov 2006 07:21:59 -0800 (PST)
Message-ID: <20061116152159.63878.qmail@web58107.mail.re3.yahoo.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Cc: nfs@lists.sourceforge.net, nfsv4@linux-nfs.org
To: "J. Bruce Fields" <bfields@fieldses.org>
Sender: nfs-bounces@lists.sourceforge.net
Errors-To: nfs-bounces@lists.sourceforge.net

Hi Bruce,

Sure.  It was a bit frustrating learning the sysctl debug
infrastructure for the first time and weeding through
the code to add more debug statements, but I'm glad
I got to the bottom of things.

Please let me know if there is a quick fix for this
problem.  It would be idea to get this into the
main kernel tree as soon as possible.

Thanks again,
Paarvai

----- Original Message ----
From: J. Bruce Fields <bfields@fieldses.org>
To: Open Source <opensource3141@yahoo.com>
Cc: nfsv4@linux-nfs.org; nfs@lists.sourceforge.net
Sent: Wednesday, November 15, 2006 7:51:29 PM
Subject: Re: "mount: File exists" when trying to mount a second krb5 volume!

On Wed, Nov 15, 2006 at 06:31:17PM -0800, Open Source wrote:
> Here's what is happening.

Thanks for your persistence!

> For the second mount to the same server, the rpc client is
> cloned and has the same path in /var/lib/nfs/rpc_pipefs/nfs
> has the first connection.  Therefore on step 3 the pipe creation
> fails in net/sunrpc/auth_gss/auth_gss.c.  This causes the
> entire mount to fail.

Argh, I could swear we've tried to fix this problem at least twice
before....

> This is a serious bug that prevents important functionality
> of nfsv3 with krb5.  I notice that kernel 2.6.19 is on release
> candidate 5.  Is there any way a surgical fix can be inserted
> into 2.6.19 before final release?

I'll take a look tommorow if someone else doesn't beat me to it, but I
doubt we'll get it done that fast.

--b.


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