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Date:      Wed, 27 Mar 2002 10:38:04 -0800 (PST)
From:      Julian Elischer <julian@elischer.org>
To:        Luigi Rizzo <rizzo@icir.org>
Cc:        Archie Cobbs <archie@dellroad.org>, freebsd-net@FreeBSD.ORG
Subject:   Re: ip_output and ENOBUFS
Message-ID:  <Pine.BSF.4.21.0203271036570.43629-100000@InterJet.elischer.org>
In-Reply-To: <20020327101358.B22365@iguana.icir.org>

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On Wed, 27 Mar 2002, Luigi Rizzo wrote:

> On Wed, Mar 27, 2002 at 09:53:00AM -0800, Archie Cobbs wrote:
> ...
> > > managed and can be extended to point to additional ifnet state that
> > > does not fit in the immutable one...
> > 
> > Why is it important to avoid changing 'struct ifnet' ?
> 
> backward compatibility with binary-only drivers ...
> Not that i care too much (in the end it is for the benefit of
> a limited set of people which could as well not upgrade, vs.
> preventing useful functionality to be added in a safe way),
> but some people do and i can see their point.
> On the other hand, this also means we can never progress if not
> on major releases or unless changes slip in unnoticed...

It is possible to hang extra info off the ifnet structure if one is
careful. just not IN it..

> 
> 	cheers
> 	luigi
> 
> > -Archie
> > 
> > __________________________________________________________________________
> > Archie Cobbs     *     Packet Design     *     http://www.packetdesign.com
> > 
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> 


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