From owner-freebsd-arch@FreeBSD.ORG  Tue Sep 16 22:35:28 2003
Return-Path: <owner-freebsd-arch@FreeBSD.ORG>
Delivered-To: freebsd-arch@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id D285816A4B3
	for <freebsd-arch@freebsd.org>; Tue, 16 Sep 2003 22:35:28 -0700 (PDT)
Received: from harmony.village.org (rover.bsdimp.com [204.144.255.66])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 0B62B43F85
	for <freebsd-arch@freebsd.org>; Tue, 16 Sep 2003 22:35:28 -0700 (PDT)
	(envelope-from imp@bsdimp.com)
Received: from localhost (warner@rover2.village.org [10.0.0.1])
	by harmony.village.org (8.12.9/8.12.3) with ESMTP id h8H5ZQTX088675;
	Tue, 16 Sep 2003 23:35:27 -0600 (MDT)
	(envelope-from imp@bsdimp.com)
Date: Tue, 16 Sep 2003 23:35:28 -0600 (MDT)
Message-Id: <20030916.233528.64215542.imp@bsdimp.com>
To: bms@spc.org
From: "M. Warner Losh" <imp@bsdimp.com>
In-Reply-To: <20030916232724.GG3052@saboteur.dek.spc.org>
References: <20030916232724.GG3052@saboteur.dek.spc.org>
X-Mailer: Mew version 2.2 on Emacs 21.3 / Mule 5.0 (SAKAKI)
Mime-Version: 1.0
Content-Type: Text/Plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
cc: freebsd-arch@freebsd.org
Subject: Re: devd limitations / automounting removable storage
X-BeenThere: freebsd-arch@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Discussion related to FreeBSD architecture
	<freebsd-arch.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arch>,
	<mailto:freebsd-arch-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-arch>
List-Post: <mailto:freebsd-arch@freebsd.org>
List-Help: <mailto:freebsd-arch-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arch>,
	<mailto:freebsd-arch-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 17 Sep 2003 05:35:28 -0000

In message: <20030916232724.GG3052@saboteur.dek.spc.org>
            Bruce M Simpson <bms@spc.org> writes:
: Any objections to adding devd notifications to the CAM layer? It would
: allow us to automount such devices. Specifically I'm thinking that a
: program to change the running automounter map could be used.

I'd make them different types of events.  I'd also prototype it up to
see how bad things get.

In the long term, we want CAM to be newbus.

However, in the long term we'd also like to move away from doing
things to devices, and more towards doing things on the resources they
provide to the system.  When a network interface appears, we should
use that event, not that a driver attached.

The simple devd detach/attachment stuff we do now gets us a lot of
bang for the buck, but there are limitations.

Warner