linux-kernel - Re: [REGRESSION][PATCH V4 3/3] bpf jit: Let the powerpc jit handle negative offsets

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Date:	Tue, 01 May 2012 07:57:29 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	David Miller <davem@...emloft.net>
Cc:	kaffeemonster@...glemail.com, eric.dumazet@...il.com,
	matt@...abs.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [REGRESSION][PATCH V4 3/3] bpf jit: Let the powerpc jit handle
 negative offsets

On Tue, 2012-05-01 at 07:55 +1000, Benjamin Herrenschmidt wrote:
> On Mon, 2012-04-30 at 13:41 -0400, David Miller wrote:
> > From: Benjamin Herrenschmidt <benh@...nel.crashing.org>
> > Date: Mon, 30 Apr 2012 15:26:08 +1000
> > 
> > > David, what's the right way to fix that ?
> > 
> > There is no doubt that sock_fprog is the correct datastructure to use.
> 
> Ok, so the right fix is to email anybody who posted code using struct
> bpf_program to fix their code ? :-)

Actually, the right fix is for anybody using pcap-bpf.h to not
use SO_ATTACH_FILTER directly but to use pcap_setfilter() which
handles the compatibility.

I'll start spamming web sites who tell people to do the wrong thing.

Cheers,
Ben.


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