From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753924AbXC1EUU (ORCPT ); Wed, 28 Mar 2007 00:20:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753926AbXC1EUU (ORCPT ); Wed, 28 Mar 2007 00:20:20 -0400 Received: from canuck.infradead.org ([209.217.80.40]:57352 "EHLO canuck.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753924AbXC1EUT (ORCPT ); Wed, 28 Mar 2007 00:20:19 -0400 Date: Tue, 27 Mar 2007 21:10:05 -0700 From: Greg KH To: Kay Sievers , linux-kernel@vger.kernel.org Subject: Re: new sysfs layout and ethernet device names Message-ID: <20070328041005.GA7550@kroah.com> References: <20070320170102.GA16341@nostromo.devel.redhat.com> <3ae72650703220147j42db8f79s734d4755c2fa43fd@mail.gmail.com> <20070328031743.GA11819@nostromo.devel.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070328031743.GA11819@nostromo.devel.redhat.com> User-Agent: Mutt/1.5.14 (2007-02-12) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 27, 2007 at 11:17:43PM -0400, Bill Nottingham wrote: > Kay Sievers (kay.sievers@vrfy.org) said: > > >If you *do* try to use one of these names, the rename will succeed... > > >partway. The link in /sys/class/net is renamed, the directory is > > >not (as it obviously can't rename on top of whatever is already there.) > > >Various networking tools then break in assorted ways due to the > > >naming disconnect. > > > > > >Going back to the deprecated layout makes these names available again - > > >it's possible (although not necessarily likely) that the new layout > > >will break someone's device configuration if they upgrade kernels, > > >even if the rest of their tools are updated for the new layout. > > > > There will be a directory at the bus-device with the name of the > > class, that glues together the bus-devices and the class-devices in > > the unified tree: > > http://git.kernel.org/?p=linux/kernel/git/gregkh/patches.git;a=blob;f=driver/driver-core-fix-namespace-issue-with-devices-assigned-to-classes.patch;hb=HEAD > > > > So the network-interface(s) will be in their own directory "net", > > below the bus-device, and don't conflict with the existing attributes. > > So, the layout will change again? If you follow the rules in Documentation/ABI/testing/sysfs-class your program will not have any problems. And yes, it will change by adding another subdirectory in the device tree, but just follow the link from the /sys/class/ directorys and you will be fine. thanks, greg k-h