From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266469AbUAIKLO (ORCPT ); Fri, 9 Jan 2004 05:11:14 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266471AbUAIKLO (ORCPT ); Fri, 9 Jan 2004 05:11:14 -0500 Received: from hirsch.in-berlin.de ([192.109.42.6]:33677 "EHLO hirsch.in-berlin.de") by vger.kernel.org with ESMTP id S266469AbUAIKLN (ORCPT ); Fri, 9 Jan 2004 05:11:13 -0500 X-Envelope-From: news@bytesex.org To: linux-kernel@vger.kernel.org Path: not-for-mail From: Gerd Knorr Newsgroups: lists.linux.kernel Subject: Re: removable media revalidation - udev vs. devfs or static /dev Date: 09 Jan 2004 10:49:03 +0100 Organization: SuSE Labs, Berlin Message-ID: <87wu81tptc.fsf@bytesex.org> References: <200401012333.04930.arvidjaar@mail.ru> <20040103055847.GC5306@kroah.com> <20040107185656.GB31827@kroah.com> <20040109033655.GK11065@ca-server1.us.oracle.com> NNTP-Posting-Host: localhost Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: bytesex.org 1073641743 7342 127.0.0.1 (9 Jan 2004 09:49:03 GMT) User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Joel Becker writes: > On Wed, Jan 07, 2004 at 10:57:00AM -0800, Greg KH wrote: > > Hm, that would work, but what about a user program that just polls on > > the device, as the rest of this thread discusses? As removable devices > > are not the "norm" it would seem a bit of overkill to create 16 > > partitions for every block device, if they need them or not. > > Um, adding all 16 partitions for a block device that has 5 > defined is opposite of the intention of udev, no? It shouldn't be _that_ bad. removable media devices usually tell you that they are removable media devices (scsi: inquiry data has a bit for that IIRC). If you pass this up to hotplug it can use that to figure whenever it has a hard disk (=> just create the existing partitions) or a removable device (=> create a few more nodes to catch the usual removable media layouts). I also think you don't need *all* minors for removable media. I havn't seen removable media with extended partitions so far. IIRC zip floppys are using /dev/sda4 and most other ones either /dev/sda1 or /dev/sda directly, so we likely can catch 99% with just three device nodes. Gerd -- You have a new virus in /var/mail/kraxel