linux-kernel - Re: [NFS] What's slated for inclusion in 2.6.24-rc1 from the NFS client git tree...

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Date:	Fri, 5 Oct 2007 14:00:37 -0400
From:	Jeff Layton <jlayton@...hat.com>
To:	Valdis.Kletnieks@...edu
Cc:	Trond Myklebust <trond.myklebust@....uio.no>,
	Peter Staubach <staubach@...hat.com>, nfsv4@...ux-nfs.org,
	linux-kernel@...r.kernel.org, nfs@...ts.sourceforge.net,
	Pierre Ossman <drzeus-list@...eus.cx>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [NFS] What's slated for inclusion in 2.6.24-rc1 from the NFS
 client git tree...

On Fri, 05 Oct 2007 13:30:10 -0400
Valdis.Kletnieks@...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@...hat.com>
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