From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jan Blunck Subject: [PATCH] ipv6: no addrconf for slave devices Date: Fri, 16 Oct 2015 12:21:51 +0200 Message-ID: <1444990911-27458-1-git-send-email-jblunck@infradead.org> Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, fubar@us.ibm.com, jiri@resnulli.us To: davem@davemloft.net, kuznet@ms2.inr.ac.ru, jmorris@namei.org, yoshfuji@linux-ipv6.org, kaber@trash.net Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org If a device without the IFF_SLAVE flag set (e.g. team, bridge, openvswitch vport, batman) is enslaved and IPv6 is active then addrconf will be initiated and a link-local address is added to the slave interface. This patch alters the behavior so that addrconf will only run on the master device itself. This is achieved by checking the device tree instead of checking for a specific flag. Signed-off-by: Jan Blunck --- net/ipv6/addrconf.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 9001133..26d61f0 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -3141,8 +3141,12 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event, case NETDEV_UP: case NETDEV_CHANGE: - if (dev->flags & IFF_SLAVE) + /* If a master is set stop IPv6 on this interface */ + if (netdev_master_upper_dev_get(dev)) { + if (idev) + addrconf_ifdown(dev, 1); break; + } if (idev && idev->cnf.disable_ipv6) break; -- 2.1.4