From ca935da7f41bb2186f2a007ae183b27f37c8f5a3 Mon Sep 17 00:00:00 2001 From: Petr Machata Date: Thu, 13 Dec 2018 11:54:37 +0000 Subject: [PATCH] net: bridge: Issue NETDEV_PRE_CHANGEADDR When a port is attached to a bridge, the address of the bridge in question may change as well. Even if it would not change at this point (because the current bridge address is lower), it might end up changing later as a result of detach of another port, which can't be vetoed. Therefore issue NETDEV_PRE_CHANGEADDR regardless of whether the address will be used at this point or not, and make sure all involved parties would agree with the change. Signed-off-by: Petr Machata Acked-by: Jiri Pirko Reviewed-by: Ido Schimmel Signed-off-by: David S. Miller --- net/bridge/br_if.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c index 3b945d6..41f0a69 100644 --- a/net/bridge/br_if.c +++ b/net/bridge/br_if.c @@ -650,6 +650,15 @@ int br_add_if(struct net_bridge *br, struct net_device *dev, if (br_fdb_insert(br, p, dev->dev_addr, 0)) netdev_err(dev, "failed insert local address bridge forwarding table\n"); + if (br->dev->addr_assign_type != NET_ADDR_SET) { + /* Ask for permission to use this MAC address now, even if we + * don't end up choosing it below. + */ + err = dev_pre_changeaddr_notify(br->dev, dev->dev_addr, extack); + if (err) + goto err7; + } + err = nbp_vlan_init(p, extack); if (err) { netdev_err(dev, "failed to initialize vlan filtering on this port\n"); -- 2.7.4