From: James Pearson <james-p@moving-picture.com>
Subject: Re: df and "Value too large for defined data type"
Date: Wed, 25 Feb 2004 22:30:47 +0000
Sender: nfs-admin@lists.sourceforge.net
Message-ID: <403D2217.9040405@moving-picture.com>
References: <403B512C.66BF37BB@moving-picture.com>
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To: nfs@lists.sourceforge.net
In-Reply-To: <403B512C.66BF37BB@moving-picture.com>
Errors-To: nfs-admin@lists.sourceforge.net

I think I've found part of the reason for this - and it's not an NFS 
problem - the 'Value too large for defined data type' comes from the 
'return -EOVERFLOW' from vfs_statfs_native() in fs/open.c - the value of 
f_files (total number of nodes in file system) returned by FSSTAT from 
the server is 2^64 - 1 (18446744073709551615) !!

It looks like 2.4.X doesn't check for this overflow - and just takes the 
  lower 32 bits.

The underlying remote file system is XFS - which in this case appears to 
be saying that it has 2^64 - 1 inodes - which doesn't seem correct...

James Pearson

James Pearson wrote:
> Using a (vanilla) 2.6.3 NFS client and using df on a on a particular NFS
> mounted file system gives:
> 
> df: `/mnt/tmp': Value too large for defined data type
> 
> /mnt/tmp is mounted from a server running 2.4.21 that has a 3.5TB RAID
> split into 4 partitions of less than 1TB each. The file system on the
> server is XFS.
> 
> /proc/mounts on the client shows:
> 
> lead:/disk1 /mnt/tmp nfs
> rw,v3,rsize=8192,wsize=8192,hard,udp,lock,addr=lead 0 0
> 
> When I use NFSv2, df (or actually statfs()) works as expected - as do
> mounts to other NFS servers (it appears to be just this one server).
> 
> Also, clients running 2.4.X, have no problems with this server.
> 
> Any ideas?
> 
> James Pearson
> 
> 
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