Re: [PATCH] NFS: Handle a zero-length auth flavor list

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On Fri, 2009-08-21 at 17:50 -0400, Chuck Lever wrote:
> Some releases of Linux rpc.mountd (nfs-utils 1.1.4 and later) return an
> empty auth flavor list if no sec= was specified for the export.  This is
> notably broken server behavior.
> 
> The new auth flavor list checking added in a recent commit rejects this
> case.  The OpenSolaris client does too.
> 
> The broken mountd implementation is already widely deployed.  To avoid
> a behavioral regression, the kernel's mount client skips flavor checking
> (ie reverts to the pre-2.6.32 behavior) if mountd returns an empty
> flavor list.
> 
> Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
> ---
> 
> Trond-
> 
> First proposal to address the empty flavor list regression.

Looks alright. Do we know that it fixes the problem for Fengguang?

Cheers
  Trond

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