From mboxrd@z Thu Jan 1 00:00:00 1970 From: Al Viro Subject: Re: FW: Symbolic link with absolute target path in UDF - not working properly? Date: Tue, 13 Dec 2011 20:26:53 +0000 Message-ID: <20111213202653.GJ2203@ZenIV.linux.org.uk> References: <20111207180637.GM4622@quack.suse.cz> <20111212141817.GA5473@quack.suse.cz> <4ee73093.ByQYnWpgRk/yNHIS%schily@schily.net> <20111213161303.GE11747@quack.suse.cz> <4ee799c8.IGU4Fg9P4wlTkYIO%schily@schily.net> <20111213192526.GA20267@quack.suse.cz> <4ee7ad60.v6cTrJDUPPEjdDhI%schily@schily.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: jack@suse.cz, otnaccess@hotmail.com, linux-fsdevel@vger.kernel.org, joerg@schily.net To: Joerg Schilling Return-path: Received: from zeniv.linux.org.uk ([195.92.253.2]:41672 "EHLO ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755913Ab1LMU1A (ORCPT ); Tue, 13 Dec 2011 15:27:00 -0500 Content-Disposition: inline In-Reply-To: <4ee7ad60.v6cTrJDUPPEjdDhI%schily@schily.net> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: On Tue, Dec 13, 2011 at 08:54:08PM +0100, Joerg Schilling wrote: > Please reread my previous mail. Your problem is that you use the wrong linux > nomenclature while reading my text. > > The pointer to the related "lofs" sourcecode explains how it works and why it > works as expected on Solaris. > > Note that a mount point relative absolute path needs to be evaluated against > the real original (first) mount and not against the second loopback mount. Except that unlike your lofs, bindings are symmetrical. I.e. there is no such thing as "real" mount - they are simply mounts refering to various subtrees of given fs. And mount --bind /foo/bar /baz does *not* render /foo impossible to umount. Not to mention that even on Solaris there's such thing as chroot and you really don't want to open that can of worms...