Re: NFSv2 directory cannot longer be exported in 3.14, 3.13 works fine

[Jeff Layton]

On Sat, 05 Apr 2014 14:17:27 +0200
Toralf Förster <toralf.foerster@xxxxxx> wrote:

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> On 04/04/2014 11:57 PM, Toralf Förster wrote:
> > At a user mode linux image (32 bit Gentoo Linux) the recent kernel gives this error while trying to mount a NFSv2 directory:
> > mount.nfs: mount point /mnt/nfsv2 is not a directory
> > 
> 
> A bisect points to :
> 
> 6e14b46b91fee8a049b0940333ce13a820beaaa5 is the first bad commit
> commit 6e14b46b91fee8a049b0940333ce13a820beaaa5
> Author: Albert Fluegel <af@xxxxxx>
> Date:   Mon Nov 18 12:18:01 2013 -0500
> 
>     nfsd: don't return high mode bits
> 
>     The Linux NFS server replies among other things to a "Check access permission"
>     the following:
> 
>     NFS:    File type = 2 (Directory)
>     NFS:    Mode = 040755
> 
>     A netapp server replies here:
>     NFS:    File type = 2 (Directory)
>     NFS:    Mode = 0755
> 
>     The RFC 1813 i read:
>        fattr3
> 
>           struct fattr3 {
>              ftype3     type;
>              mode3      mode;
>              uint32     nlink;
>     ...
>     For the mode bits only the lowest 9 are defined in the RFC
> 
>     As far as I can tell, knfsd has always done this, so apparently it's harmless.
>     Nevertheless, it appears to be wrong.
> 
>     Note this is already correct in the NFSv4 case, only v2 and v3 need
>     fixing.
> 
>     Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxx>
> 
> :040000 040000 a60e55f5a9749db3977e12e8baa08d45fadba225 b982c02ec1069c5d969ccb71197e5569fe93b075 M fs
> 
> - -- 
> MfG/Sincerely
> Toralf Förster
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This was already tracked down earlier this week. Bruce has a patch
queued to fix it in his nfsd-next branch. See this thread from earlier
this week:

    Subject: Re: linux-3.14 nfsd regression

-- 
Jeff Layton <jlayton@xxxxxxxxxx>
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