From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Ahern Subject: Re: [PATCH net-next 0/5] vrf: allow simultaneous service instances in default and other VRFs Date: Thu, 20 Sep 2018 21:28:43 -0700 Message-ID: References: <20180920085848.17721-1-mmanning@vyatta.att-mail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit To: Mike Manning , netdev@vger.kernel.org, David Miller Return-path: Received: from mail-pf1-f194.google.com ([209.85.210.194]:34434 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726160AbeIUKPp (ORCPT ); Fri, 21 Sep 2018 06:15:45 -0400 Received: by mail-pf1-f194.google.com with SMTP id k19-v6so5390880pfi.1 for ; Thu, 20 Sep 2018 21:28:45 -0700 (PDT) In-Reply-To: <20180920085848.17721-1-mmanning@vyatta.att-mail.com> Content-Language: en-US Sender: netdev-owner@vger.kernel.org List-ID: On 9/20/18 1:58 AM, Mike Manning wrote: > Services currently have to be VRF-aware if they are using an unbound > socket. One cannot have multiple service instances running in the > default and other VRFs for services that are not VRF-aware and listen > on an unbound socket. This is because there is no way of isolating > packets received in the default VRF from those arriving in other VRFs. > > This series provides this isolation subject to the existing kernel > parameter net.ipv4.tcp_l3mdev_accept not being set, given that this is > documented as allowing a single service instance to work across all > VRF domains. The functionality applies to UDP & TCP services, for IPv4 > and IPv6, in particular adding VRF table handling for IPv6 multicast. > > Example of running ssh instances in default and blue VRF: > > $ /usr/sbin/sshd -D > $ ip vrf exec vrf-blue /usr/sbin/sshd > $ ss -ta | egrep 'State|ssh' > State Recv-Q Send-Q Local Address:Port Peer Address:Port > LISTEN 0 128 0.0.0.0%vrf-blue:ssh 0.0.0.0:* > LISTEN 0 128 0.0.0.0:ssh 0.0.0.0:* > ESTAB 0 0 192.168.122.220:ssh 192.168.122.1:50282 > LISTEN 0 128 [::]%vrf-blue:ssh [::]:* > LISTEN 0 128 [::]:ssh [::]:* > ESTAB 0 0 [3000::2]%vrf-blue:ssh [3000::9]:45896 > ESTAB 0 0 [2000::2]:ssh [2000::9]:46398 > Hi Dave: I need some time to review and more importantly test this patch set before it is committed. I am traveling tomorrow afternoon through Sunday evening, so I need a few days into next week to get to this. Thanks, David