Date: Fri, 5 Oct 2007 14:00:37 -0400
From: Jeff Layton <jlayton@redhat.com>
To: Valdis.Kletnieks@vt.edu
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>,
       Peter Staubach <staubach@redhat.com>, nfsv4@linux-nfs.org,
       linux-kernel@vger.kernel.org, nfs@lists.sourceforge.net,
       Pierre Ossman <drzeus-list@drzeus.cx>,
       Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [NFS] What's slated for inclusion in 2.6.24-rc1 from the NFS
 client git tree...
Message-Id: <20071005140037.1309a8d3.jlayton@redhat.com>
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On Fri, 05 Oct 2007 13:30:10 -0400
Valdis.Kletnieks@vt.edu wrote:
>
> How does Joe Sysadmin tell if he has an affected legacy app or not?
> 
> (The obvious "try it and see what breaks" is a non-starter for many places,
> because you too easily end up in a loop of "enable it, find 4-5 show stoppers,
> turn it off, fix them, lather rinse repease".  Been there, done that, got
> the tshirt - a project I got dragged into involves a large storage array that
> appears to insist on exporting 64-bit stuff, and a large farm of clients that
> are very 64-bit unclean....)
> 

In addition to Trond's suggestion, you might be able to use "nm" or
something like it and see if there are references to non-LFS (f)stat
calls in your binaries. For instance, if you see references to stat()
(and not stat64()), then the app is probably not built with 64-bit file
offsets.

This is probably not as reliable as Trond's method, but it might be
less invasive and reasonable for a first pass when looking for these
sorts of apps...

-- 
Jeff Layton <jlayton@redhat.com>
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