Re: [PATCH] cifs: mark CONFIG_CIFS_NFSD_EXPORT as BROKEN

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On Sun, 22 May 2011 07:59:38 -0400
Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:

> On Sun, May 22, 2011 at 07:55:24AM -0400, Jeff Layton wrote:
> > This will never work properly with CIFS, as the protocol has no ability
> > whatsoever for looking up files by filehandle. It *might* be possible to
> > eventually do this with SMB2, but that remains to be seen.
> > 
> > For now, it just plain doesn't work. Mark it BROKEN to discourage
> > distros from enabling it.
> 
> It's actually dead code at this point - fs/nfsd/vfs.c:check_export()
> refuses to export a filesystem that does not have a fh_to_dentry
> operation, which cifs doesn't provide.
> 
> IMHO it's best to just remove the option and all surrounding code.
> 

I agree and proposed a patch to do that a month or two ago. Steve
NAK'ed it for reasons that I don't quite understand. At this point,
I'm just trying to make sure distros don't ship with this enabled.

-- 
Jeff Layton <jlayton@xxxxxxxxxx>
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