Re: [PATCH] cifs: mark CONFIG_CIFS_NFSD_EXPORT as BROKEN

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On Mon, May 23, 2011 at 6:12 AM, Jeff Layton <jlayton@xxxxxxxxxx> wrote:
> On Sun, 22 May 2011 20:12:04 -0500
> Steve French <smfrench@xxxxxxxxx> wrote:
>
>> On Sun, May 22, 2011 at 7:17 AM, Jeff Layton <jlayton@xxxxxxxxxx> wrote:
>> > 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.

Shirish had done some experiments (and AFAIK has a small patch
that fixed NFS export over CIFS which works, with the usual restrictions
about having to return ESTALE if the NFS client tries to access
an inode which has been flushed from the cache on the server side).

>> For nfs v3 clients that can't handle ESTALE, we are probably
>> stuck with having to wait for Samba to implement the flag
> Flag?

NTCreateX:  FILE_OPEN_BY_FILE_ID

IIRC Shirish verified that the Windows client will emit this flag, but their
server had not gotten around to implementing it (although Samba could
implement it now that their is an open-by-handle syscall).



-- 
Thanks,

Steve
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