From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760173Ab2HJTMH (ORCPT ); Fri, 10 Aug 2012 15:12:07 -0400 Received: from fieldses.org ([174.143.236.118]:40404 "EHLO fieldses.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759963Ab2HJTME (ORCPT ); Fri, 10 Aug 2012 15:12:04 -0400 Date: Fri, 10 Aug 2012 15:11:50 -0400 From: "J. Bruce Fields" To: Alan Cox Cc: "H. Peter Anvin" , Stanislav Kinsbursky , Trond.Myklebust@netapp.com, davem@davemloft.net, linux-nfs@vger.kernel.org, eric.dumazet@gmail.com, xemul@parallels.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk, tim.c.chen@linux.intel.com, devel@openvz.org Subject: Re: [RFC PATCH 0/2] net: connect to UNIX sockets from specified root Message-ID: <20120810191149.GA17985@fieldses.org> References: <20120810125701.7115.71612.stgit@localhost.localdomain> <50254FA6.3060806@zytor.com> <20120810192628.79a34d28@pyramind.ukuu.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20120810192628.79a34d28@pyramind.ukuu.org.uk> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Aug 10, 2012 at 07:26:28PM +0100, Alan Cox wrote: > > On that whole subject... > > > > Do we need a Unix domain socket equivalent to openat()? > > I don't think so. The name is just a file system indexing trick, it's not > really the socket proper. It's little more than "ascii string with > permissions attached" That's overstating the case. As I understand it the address is resolved by a pathname lookup like any other--it can follow symlinks, is relative to the current working directory and filesystem namespace, etc. So a unix-domain socket equivalent to openat() would at least be well-defined--whether it's needed or not, I don't know. --b.