linux-kernel - Re: NFS client broken in Linus' tip

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Message-ID: <20140130142752.GX15937@n2100.arm.linux.org.uk>
Date:	Thu, 30 Jan 2014 14:27:52 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	linux-nfs@...r.kernel.org,
	Trond Myklebust <trond.myklebust@...marydata.com>,
	linux-kernel@...r.kernel.org, Al Viro <viro@...iv.linux.org.uk>,
	Christoph Hellwig <hch@....de>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: NFS client broken in Linus' tip

On Thu, Jan 30, 2014 at 06:14:05AM -0800, Christoph Hellwig wrote:
> On Thu, Jan 30, 2014 at 02:08:34PM +0000, Russell King - ARM Linux wrote:
> > into nfs3_proc_create(), but this ends up calling down into nfs3_get_acl(),
> > which does this:
> > 
> >         if (!nfs_server_capable(inode, NFS_CAP_ACLS))
> >                 return ERR_PTR(-EOPNOTSUPP);
> 
> Does replacing that return with a
> 
> 		return NULL;
> 
> fix the issue for you?

Yes and no.  I still end up with an empty /etc/mtab, but the file now
exists.  However, I can create and echo data into /etc/mtab, but it seems
that can't happen at boot time.

I also find that kerberos doesn't work - again, it's weird - I can create
the file which kerberos is trying to create in /var/tmp (which is also on
the root nfs) manually, but when the kerberos daemons try to create it,
it fails with -EOPNOTSUPP.  The kerberos daemon is running as uid 0 at
that point (I don't know about the other uids/gids though since I wasn't
able to catch them in the strace.)

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