From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kirill Korotaev Subject: Re: [patch 2/6] [Network namespace] Network device sharing by view Date: Tue, 27 Jun 2006 13:54:51 +0400 Message-ID: <44A1006B.3040700@sw.ru> References: <20060609210202.215291000@localhost.localdomain> <20060609210625.144158000@localhost.localdomain> <20060626134711.A28729@castle.nmd.msu.ru> <449FF5A0.2000403@fr.ibm.com> <20060626192751.A989@castle.nmd.msu.ru> <44A00215.2040608@fr.ibm.com> <20060627131136.B13959@castle.nmd.msu.ru> <44A0FBAC.7020107@fr.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: Andrey Savochkin , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, serue@us.ibm.com, haveblue@us.ibm.com, clg@fr.ibm.com, Andrew Morton , herbert@13thfloor.at, devel@openvz.org, sam@vilain.net, ebiederm@xmission.com, viro@ftp.linux.org.uk, Alexey Kuznetsov Return-path: Received: from mailhub.sw.ru ([195.214.233.200]:1581 "EHLO relay.sw.ru") by vger.kernel.org with ESMTP id S964858AbWF0JzV (ORCPT ); Tue, 27 Jun 2006 05:55:21 -0400 To: Daniel Lezcano In-Reply-To: <44A0FBAC.7020107@fr.ibm.com> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org >> My point is that if you make namespace tagging at routing time, and >> your packets are being routed only once, you lose the ability >> to have separate routing tables in each namespace. > > > Right. What is the advantage of having separate the routing tables ? it is impossible to have bridged networking, tun/tap and many other features without it. I even doubt that it is possible to introduce private netfilter rules w/o virtualization of routing. The question is do we want to have fully featured namespaces which allow to create isolated virtual environments with semantics and behaviour of standalone linux box or do we want to introduce some hacks with new rules/restrictions to meet ones goals only? From my POV, fully virtualized namespaces are the future. It is what makes virtualization solution usable (w/o apps modifications), provides all the features and doesn't require much efforts from people to be used. Thanks, Kirill