Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752718AbaBME2Q (ORCPT ); Wed, 12 Feb 2014 23:28:16 -0500 Received: from mail-lb0-f177.google.com ([209.85.217.177]:34296 "EHLO mail-lb0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751403AbaBME2P (ORCPT ); Wed, 12 Feb 2014 23:28:15 -0500 MIME-Version: 1.0 In-Reply-To: References: <1392071391-13215-1-git-send-email-mcgrof@do-not-panic.com> <1392071391-13215-3-git-send-email-mcgrof@do-not-panic.com> <1392108205.22033.16.camel@dagon.hellion.org.uk> <1392203708.13563.50.camel@kazak.uk.xensource.com> From: "Luis R. Rodriguez" Date: Wed, 12 Feb 2014 20:27:52 -0800 X-Google-Sender-Auth: 3VvDl6nH5h4CY1rXr7wLXWdIixw Message-ID: Subject: Re: [RFC 2/2] xen-netback: disable multicast and use a random hw MAC address To: Ian Campbell Cc: "netdev@vger.kernel.org" , xen-devel@lists.xenproject.org, Paul Durrant , Wei Liu , kvm@vger.kernel.org, "linux-kernel@vger.kernel.org" Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Feb 12, 2014 at 2:05 PM, Luis R. Rodriguez wrote: > We have to be careful for sure, I'll try to test all cases including > kvm, but architecturally as I see it so far these things are simply > exchanging over data through their respective backend channels, I know > ipv6 interfaces are unused and I'm going to dig further to see why at > least one ipv4 interfaces is needed. I cannot fathom why either of > these interfaces would be required. I'll do a bit more digging. > > The TAP interface requirements may be different, I haven't yet dug into that. I have a test patch that now works that restricts xen-netback from getting any IPv4 and IPv6 addresses, and disables multicast. With this set in place the xen-frontend still gets IPv4 and IPv6 addresses and Multicast still works. This was tested under a shared physical environment, I'll have to test NAT next, and also see if we can enable this as an option for KVM for their TAP 'backend' interfaces. Luis -- 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/