NFS4: "Value too large for defined data type" problem

NFS4: "Value too large for defined data type" problem

[Sven Geggus]

Hello,

is there something which can be done server-side to work around the "Value
too large for defined data type" problem with huge inode Numbers?

First of all, I'm not shure if this is an NFS problem or one of the
underlying filesystem.

Background:
I set up a new NFS-server (NFS4) recently. The server works fine so far with
64 bit Linux clients.

It also mostly works with 32 bit Linux clients when either the stat system
call is not used or "-D_FILE_OFFSET_BITS=64" has been used.

This is because on 32 bit Linux ino_t is not 64-bit otherwise.

Unfortunately at least the 32bit Version of Debian stable (6.0) seems to
break all over the place. E.g. in gnome when stat ~/.gnome2_private/ fails
it is assumed that the directory has to be created which will of course make
the subsequent call to mkdir also fail and break the whole desktop
environment afterwords.

Regards

Sven

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Re: NFS4: "Value too large for defined data type" problem

[J. Bruce Fields]

On Fri, Feb 15, 2013 at 09:37:57AM +0000, Sven Geggus wrote:
> Hello,
> 
> is there something which can be done server-side to work around the "Value
> too large for defined data type" problem with huge inode Numbers?
> 
> First of all, I'm not shure if this is an NFS problem or one of the
> underlying filesystem.
> 
> Background:
> I set up a new NFS-server (NFS4) recently. The server works fine so far with
> 64 bit Linux clients.
> 
> It also mostly works with 32 bit Linux clients when either the stat system
> call is not used or "-D_FILE_OFFSET_BITS=64" has been used.
> 
> This is because on 32 bit Linux ino_t is not 64-bit otherwise.
> 
> Unfortunately at least the 32bit Version of Debian stable (6.0) seems to
> break all over the place. E.g. in gnome when stat ~/.gnome2_private/ fails
> it is assumed that the directory has to be created which will of course make
> the subsequent call to mkdir also fail and break the whole desktop
> environment afterwords.

What filesystem are you exporting?

For xfs, as an example, see the discussion of 64-bit inode numbers in
the mkfs.xfs man page.

--b.

RE: NFS4: "Value too large for defined data type" problem

[Myklebust, Trond]

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Re: NFS4: "Value too large for defined data type" problem

[Sven Geggus]

Myklebust, Trond <Trond.Myklebust@netapp.com> wrote:

> If your applications are unable to cope with 64-bit inode numbers, then
> you can turn back on the inode number mapping on the nfs client:
> 
> echo "options nfs enable_ino64=N" >/etc/modprobe.d/options-local.conf

Thanks, works fine.

Sven

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