Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965277AbVIPCny (ORCPT ); Thu, 15 Sep 2005 22:43:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751229AbVIPCny (ORCPT ); Thu, 15 Sep 2005 22:43:54 -0400 Received: from soundwarez.org ([217.160.171.123]:55685 "EHLO soundwarez.org") by vger.kernel.org with ESMTP id S1751227AbVIPCnx (ORCPT ); Thu, 15 Sep 2005 22:43:53 -0400 Date: Fri, 16 Sep 2005 04:43:51 +0200 From: Kay Sievers To: Dmitry Torokhov Cc: Greg KH , linux-kernel@vger.kernel.org, Vojtech Pavlik , Hannes Reinecke , Patrick Mochel , airlied@linux.ie Subject: Re: [RFC] subclasses in sysfs to solve world peace Message-ID: <20050916024351.GC13486@vrfy.org> References: <20050916002036.GA6149@suse.de> <200509152103.42313.dtor_core@ameritech.net> <20050916021415.GB13486@vrfy.org> <200509152136.08951.dtor_core@ameritech.net> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <200509152136.08951.dtor_core@ameritech.net> User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3015 Lines: 81 On Thu, Sep 15, 2005 at 09:36:08PM -0500, Dmitry Torokhov wrote: > On Thursday 15 September 2005 21:14, Kay Sievers wrote: > > On Thu, Sep 15, 2005 at 09:03:41PM -0500, Dmitry Torokhov wrote: > > > On Thursday 15 September 2005 20:54, Kay Sievers wrote: > > > > On Thu, Sep 15, 2005 at 08:23:43PM -0500, Dmitry Torokhov wrote: > > > > > On Thursday 15 September 2005 20:04, Kay Sievers wrote: > > > > > > I like that the child devices are actually below the parent device > > > > > > and represent the logical structure. I prefer that compared to the > > > > > > symlink-representation between the classes at the same directory > > > > > > level which the input patches propose. > > > > > > > > > > Why don't we take it a step further and abandon classes altogether? > > > > > This way everything will grow from their respective hardware devices. > > > > > > > > Not everything is hardware. :) > > > > > > > > > Class represent a set of objects with similar characteristics. In > > > > > this regard event0 is no "lesser" than input0. Although they are > > > > > linked they are objects of the same importance. I do want to see > > > > > all input interfaces without scanning bunch of directories. > > > > > > > > No problem, how about this: > > > > /sys/class/input/ > > > > |-- input0 > > > > | |-- event0 > > > > | | `-- dev > > > > | `-- mouse0 > > > > | | `-- dev > > > > |-- input1 > > > > | |-- event1 > > > > | | `-- dev > > > > | `-- ts0 > > > > | | `-- dev > > > > |-- mice > > > > | `-- dev > > > > `-- interfaces > > > > |-- event0 ->·../input0/event0 > > > > |-- event1 ->·../input1/event1 > > > > |-- mouse0 ->·../input0/mouse0 > > > > |-- mice -> ../mice > > > > `-- ts0 -> ../input1/ts0 > > > > > > > > > > I am thinking... the rule would be - when adding a class device if it > > > has a class_device parent then it gets added to parent's directory and > > > symlinked into class. Otherwise it gets added into class directory. > > > > Like this? > > > > /sys/class/input/ > > |-- input0 > > | |-- event0 > > | | `-- dev > > | `-- mouse0 > > | | `-- dev > > |-- input1 > > | |-- event1 > > | | `-- dev > > | `-- ts0 > > | | `-- dev > > |-- mice > > | `-- dev > > |-- event0 ->·input0/event0 > > |-- event1 ->·input1/event1 > > |-- mouse0 ->·input0/mouse0 > > `-- ts0 -> input1/ts0 > > > > No, like your first picture, except 'interfaces/mice' will be a directory, > not a symlink, since it does not have class_device parent. I should have > said "Otherwise it gets added into _its_ class directory". Ah, I see. But the second model would work without any changes to existing software. :) Kay - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/