Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754582Ab2HJTYI (ORCPT ); Fri, 10 Aug 2012 15:24:08 -0400 Received: from lxorguk.ukuu.org.uk ([81.2.110.251]:41041 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751843Ab2HJTYE (ORCPT ); Fri, 10 Aug 2012 15:24:04 -0400 Date: Fri, 10 Aug 2012 20:28:18 +0100 From: Alan Cox To: "J. Bruce Fields" 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: <20120810202818.06236f46@pyramind.ukuu.org.uk> In-Reply-To: <20120810191149.GA17985@fieldses.org> References: <20120810125701.7115.71612.stgit@localhost.localdomain> <50254FA6.3060806@zytor.com> <20120810192628.79a34d28@pyramind.ukuu.org.uk> <20120810191149.GA17985@fieldses.org> X-Mailer: Claws Mail 3.8.0 (GTK+ 2.24.8; x86_64-redhat-linux-gnu) Face: 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 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1224 Lines: 30 On Fri, 10 Aug 2012 15:11:50 -0400 "J. Bruce Fields" wrote: > 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. Explicitly for Linux yes - this is not generally true of the AF_UNIX socket domain and even the permissions aspect isn't guaranteed to be supported on some BSD environments ! The name is however just a proxy for the socket itself. You don't even get a device node in the usual sense or the same inode in the file system space. Alan -- 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/