From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762388AbZCQM4k (ORCPT ); Tue, 17 Mar 2009 08:56:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753997AbZCQM4a (ORCPT ); Tue, 17 Mar 2009 08:56:30 -0400 Received: from vsmtp04.dti.ne.jp ([202.216.231.139]:63891 "EHLO vsmtp04.dti.ne.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751282AbZCQM42 (ORCPT ); Tue, 17 Mar 2009 08:56:28 -0400 From: hooanon05@yahoo.co.jp Subject: Re: [RFC Aufs2 #2 21/28] aufs sysfs entries To: Evgeniy Polyakov Cc: Greg KH , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org In-Reply-To: <20090317103923.GA4630@ioremap.net> References: <1237188040-11404-1-git-send-email-hooanon05@yahoo.co.jp> <1237188040-11404-22-git-send-email-hooanon05@yahoo.co.jp> <20090316180538.GA7069@kroah.com> <7200.1237260402@jrobl> <20090317033747.GA17037@kroah.com> <7974.1237262747@jrobl> <20090317103923.GA4630@ioremap.net> Date: Tue, 17 Mar 2009 21:56:11 +0900 Message-ID: <13217.1237294571@jrobl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Evgeniy Polyakov: > On Tue, Mar 17, 2009 at 01:05:47PM +0900, hooanon05@yahoo.co.jp (hooanon05@yahoo.co.jp) wrote: > > Is the limit of PATH_MAX applied to the absolute path too? > > No, only path used in the given operation (related or absolute) is > limited. If related path is converted into the absolute just for the > purpose of dump and not to be used in some syscall, it can have any > length, so you may need to rethink which pathes are presented in sysfs > and what should be moved outside. As a result, current code is implemented. - aufs entries under sysfs print the absolute path. - sets limit (PAGE_SIZE) to its length. - and I think it is enough. Theoretically, every entries under procfs (or sysfs?) which contains the absolute path have this problem. J. R. Okajima