From bada37db36c8c24d2c459b1ec6ea18f8c8c8f03c Mon Sep 17 00:00:00 2001 From: Russell King Date: Sun, 22 Dec 2019 16:36:35 +0000 Subject: net: switchdev: do not propagate bridge updates across bridges When configuring a tree of independent bridges, propagating changes from the upper bridge across a bridge master to the lower bridge ports brings surprises. For example, a lower bridge may have vlan filtering enabled. It may have a vlan interface attached to the bridge master, which may then be incorporated into another bridge. As soon as the lower bridge vlan interface is attached to the upper bridge, the lower bridge has vlan filtering disabled. This occurs because switchdev recursively applies its changes to all lower devices no matter what. Reviewed-by: Ido Schimmel Tested-by: Ido Schimmel Signed-off-by: Russell King --- net/switchdev/switchdev.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c index 3a1d428c1336..d881e5e4a889 100644 --- a/net/switchdev/switchdev.c +++ b/net/switchdev/switchdev.c @@ -475,6 +475,9 @@ static int __switchdev_handle_port_obj_add(struct net_device *dev, * necessary to go through this helper. */ netdev_for_each_lower_dev(dev, lower_dev, iter) { + if (netif_is_bridge_master(lower_dev)) + continue; + err = __switchdev_handle_port_obj_add(lower_dev, port_obj_info, check_cb, add_cb); if (err && err != -EOPNOTSUPP) @@ -526,6 +529,9 @@ static int __switchdev_handle_port_obj_del(struct net_device *dev, * necessary to go through this helper. */ netdev_for_each_lower_dev(dev, lower_dev, iter) { + if (netif_is_bridge_master(lower_dev)) + continue; + err = __switchdev_handle_port_obj_del(lower_dev, port_obj_info, check_cb, del_cb); if (err && err != -EOPNOTSUPP) @@ -576,6 +582,9 @@ static int __switchdev_handle_port_attr_set(struct net_device *dev, * necessary to go through this helper. */ netdev_for_each_lower_dev(dev, lower_dev, iter) { + if (netif_is_bridge_master(lower_dev)) + continue; + err = __switchdev_handle_port_attr_set(lower_dev, port_attr_info, check_cb, set_cb); if (err && err != -EOPNOTSUPP) -- cgit