From mboxrd@z Thu Jan 1 00:00:00 1970 From: Li Wei Subject: [PATCH] ipv6: Fix for adding multicast route for loopback device automatically. Date: Wed, 07 Dec 2011 15:23:45 +0800 Message-ID: <4EDF1481.1080106@cn.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=GB2312 Content-Transfer-Encoding: 7bit Cc: "David S. Miller" , yoshfuji@linux-ipv6.org To: netdev Return-path: Received: from cn.fujitsu.com ([222.73.24.84]:63022 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1751799Ab1LGHXe (ORCPT ); Wed, 7 Dec 2011 02:23:34 -0500 Sender: netdev-owner@vger.kernel.org List-ID: There is no obvious reason to add a default multicast route for loopback devices, otherwise there would be a route entry whose dst.error set to -ENETUNREACH that would blocking all multicast packets. Signed-off-by: Li Wei --- net/ipv6/addrconf.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index cf88df8..36806de 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -1805,7 +1805,8 @@ static struct inet6_dev *addrconf_add_dev(struct net_device *dev) return ERR_PTR(-EACCES); /* Add default multicast route */ - addrconf_add_mroute(dev); + if (!(dev->flags & IFF_LOOPBACK)) + addrconf_add_mroute(dev); /* Add link local route */ addrconf_add_lroute(dev); -- 1.7.3.2