linux-kernel - Re: [NFS] NFSv2/3 broken exporting/mounting (permission denied) in 2.6.24-rc4

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Date:	Fri, 07 Dec 2007 15:38:44 -0500
From:	Valdis.Kletnieks@...edu
To:	"J. Bruce Fields" <bfields@...ldses.org>
Cc:	Erez Zadok <ezk@...sunysb.edu>, linux-kernel@...r.kernel.org,
	nfs@...ts.sourceforge.net,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Pavel Machek <pavel@....cz>,
	Pavel Emelyanov <xemul@...nvz.org>,
	"David S. Miller" <davem@...emloft.net>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Herbert Xu <herbert@...dor.apana.org.au>
Subject: Re: [NFS] NFSv2/3 broken exporting/mounting (permission denied) in 2.6.24-rc4

On Fri, 07 Dec 2007 15:06:55 EST, "J. Bruce Fields" said:
> On Fri, Dec 07, 2007 at 03:00:13PM -0500, Erez Zadok wrote:

> > commit 2b1e300a9dfc3196ccddf6f1d74b91b7af55e416
> > Author: Eric W. Biederman <ebiederm@...ssion.com>
> > Date:   Sun Dec 2 00:33:17 2007 +1100

> Those files are actually in a separate filesystem (of type "nfsd") which
> is supposed to be mounted on /proc/fs/nfsd/.   So that mount must have
> failed in the bad case?  It's not immediately obvious to me what this
> patch has to do with that.  Hm.

For what it's worth, the startup scripts for 'wine' and 'jexec' fail as well,
and at shutdown, I get complaints about being unable to dismount 
/proc/sys/fs/binfmt_misc. 'strace' says:

open("/proc/sys/fs/binfmt_misc/windows", O_WRONLY|O_CREAT|O_TRUNC, 0666) = -1 EN
OENT (No such file or directory)

# grep binfmt /proc/mounts
none /proc/sys/fs/binfmt_misc binfmt_misc rw 0 0
none /proc/sys/fs/binfmt_misc binfmt_misc rw 0 0

I have to wonder if the fact there's 2 of them mounted is related to the
fact that 2 startup scripts tried to touch files under fs/binfmt_misc/ ?


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