From owner-freebsd-arch@FreeBSD.ORG Wed Sep 1 16:33:10 2004 Return-Path: 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 3DA7616A4CE for ; Wed, 1 Sep 2004 16:33:10 +0000 (GMT) Received: from athena.softcardsystems.com (mail.softcardsystems.com [12.34.136.114]) by mx1.FreeBSD.org (Postfix) with ESMTP id A172E43D53 for ; Wed, 1 Sep 2004 16:33:09 +0000 (GMT) (envelope-from sah@softcardsystems.com) Received: from athena (athena [12.34.136.114])i81HWw9D014636 for ; Wed, 1 Sep 2004 12:32:58 -0500 Date: Wed, 1 Sep 2004 12:32:58 -0500 (EST) From: Sam X-X-Sender: sah@athena To: freebsd-arch@freebsd.org Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Subject: disk_create and cdevsw_add X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 01 Sep 2004 16:33:10 -0000 'lo again, kern/subr_disk.c:/^disk_create/ takes two cdevsw types, and I only vaguely understand why. Can someone explain it to me? I'm generally confused about resolving entry points into the driver. Does a block device only get an open() after registering it with disk_create? Supposing I want to set some ioctls for an aoecontrol utility (show all devices known, eg), what would aoecontrol open to ioctl? Sam