From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1755741Ab3CaScl (ORCPT <rfc822;w@1wt.eu>);
	Sun, 31 Mar 2013 14:32:41 -0400
Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:40501 "EHLO
	atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1752696Ab3CaSck (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Sun, 31 Mar 2013 14:32:40 -0400
Date: Sun, 31 Mar 2013 20:32:38 +0200
From: Pavel Machek <pavel@ucw.cz>
To: "Myklebust, Trond" <Trond.Myklebust@netapp.com>
Cc: Andreas Dilger <adilger@dilger.ca>,
        =?iso-8859-1?Q?J=F6rn?= Engel <joern@logfs.org>,
        Andy Lutomirski <luto@amacapital.net>, Zach Brown <zab@redhat.com>,
        Paolo Bonzini <pbonzini@redhat.com>, Ric Wheeler <rwheeler@redhat.com>,
        Linux FS Devel <linux-fsdevel@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "Chris L. Mason" <clmason@fusionio.com>,
        Christoph Hellwig <hch@infradead.org>,
        Alexander Viro <aviro@redhat.com>, "Martin K. Petersen" <mkp@mkp.net>,
        Hannes Reinecke <hare@suse.de>, Joel Becker <jlbec@evilplan.org>
Subject: openat(..., AT_UNLINKED) was Re: New copyfile system call -
 discuss before LSF?
Message-ID: <20130331183238.GA25751@amd.pavel.ucw.cz>
References: <4FA345DA4F4AE44899BD2B03EEEC2FA9235DAA99@SACEXCMBX04-PRD.hq.netapp.com>
 <20130221222449.GY22221@lenny.home.zabbo.net>
 <512BD44C.40907@amacapital.net>
 <20130226210232.GA19510@logfs.org>
 <20130330194933.GB1005@amd.pavel.ucw.cz>
 <08D26E22-3856-43A4-8835-48C86CC5F71C@dilger.ca>
 <20130330214509.GB4322@amd.pavel.ucw.cz>
 <925D663D-D8F8-4297-A642-33C732354701@netapp.com>
 <20130331073604.GA13159@amd.pavel.ucw.cz>
 <1364754452.4771.10.camel@leira.trondhjem.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <1364754452.4771.10.camel@leira.trondhjem.org>
User-Agent: Mutt/1.5.20 (2009-06-14)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org


> > > > Hmm. open_deleted_file() will still need to get a directory... so it
> > > > will still need a path. Perhaps open("/foo/bar/mnt", O_DELETED) would
> > > > be acceptable interface?
> > > 
> > > ...and what's the big plan to make this work on anything other than ext4 and btrfs?
> > 
> > Deleted but open files are from original unix, so it should work on
> > anything unixy (minix, ext, ext2, ...).
> 
> minix, ext, ext2... are not under active development and haven't been
> for more than a decade.
> 
> Take a look at how many actively used filesystems out there that have
> some variant of sillyrename(), and explain what you want to do in those
> cases.

Well. Yes, there are non-unix filesystems around. You have to deal
with silly files on them, and this will not be different.

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html