From owner-cvs-all@FreeBSD.ORG  Wed Jul 28 16:53:26 2004
Return-Path: <owner-cvs-all@FreeBSD.ORG>
Delivered-To: cvs-all@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id B383D16A4CE; Wed, 28 Jul 2004 16:53:26 +0000 (GMT)
Received: from fledge.watson.org (fledge.watson.org [204.156.12.50])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 50EA643D2F; Wed, 28 Jul 2004 16:53:26 +0000 (GMT)
	(envelope-from robert@fledge.watson.org)
Received: from fledge.watson.org (localhost [127.0.0.1])
	by fledge.watson.org (8.12.11/8.12.11) with ESMTP id i6SGqQXR026275;
	Wed, 28 Jul 2004 12:52:26 -0400 (EDT)
	(envelope-from robert@fledge.watson.org)
Received: from localhost (robert@localhost)i6SGqQwI026272;
	Wed, 28 Jul 2004 12:52:26 -0400 (EDT)
	(envelope-from robert@fledge.watson.org)
Date: Wed, 28 Jul 2004 12:52:25 -0400 (EDT)
From: Robert Watson <rwatson@FreeBSD.ORG>
X-Sender: robert@fledge.watson.org
To: Garrett Wollman <wollman@khavrinen.lcs.mit.edu>
In-Reply-To: <200407281619.i6SGJwTh019305@khavrinen.lcs.mit.edu>
Message-ID: <Pine.NEB.3.96L.1040728125025.26103B-100000@fledge.watson.org>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
cc: cvs-src@FreeBSD.ORG
cc: Alfred Perlstein <alfred@FreeBSD.ORG>
cc: src-committers@FreeBSD.ORG
cc: cvs-all@FreeBSD.ORG
Subject: Re: cvs commit: src/sys/sys _task.h
X-BeenThere: cvs-all@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: CVS commit messages for the entire tree <cvs-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-all>,
	<mailto:cvs-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-all>
List-Post: <mailto:cvs-all@freebsd.org>
List-Help: <mailto:cvs-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-all>,
	<mailto:cvs-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 28 Jul 2004 16:53:26 -0000


On Wed, 28 Jul 2004, Garrett Wollman wrote:

> <<On Wed, 28 Jul 2004 08:03:16 -0700, Alfred Perlstein <alfred@FreeBSD.ORG> said:
> 
> > * Maxime Henrion <mux@freebsd.org> [040728 02:19] wrote:
> >> Or have a struct ifnet for kernel and a struct xifnet for userland, as we
> >> do in other places.
> 
> > That sounds more correct (xifnet).
> 
> No.  Everything that would legitimately be available in an xifnet
> structure is already made available through other interfaces.  The only
> reason programs might need to look at a struct ifnet is because they're
> mucking about in kernel memory, in which case they need the real one and
> not a "sanitized" version.  (This is why I moved struct ifnet to
> <net/if_var.h> in the first place.) 

Some applications and libraries declare their known violation of layering
boundaries in the system by #define _KERNEL.  Others structures have
special #define's, such as COMPAT_43, _WANT_UCRED, etc.  I'd be happy with
either #define _KERNEL or #if defined(_KERNEL) || _WANT_IFNET.

Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
robert@fledge.watson.org      Principal Research Scientist, McAfee Research