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net: switchdev: do not propagate bridge updates across bridges

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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 <idosch@mellanox.com>
Tested-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Russell King 2020-02-26 17:14:21 +00:00 committed by David S. Miller
parent 9baeea5071
commit 07c6f9805f
1 changed files with 9 additions and 0 deletions
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9
net/switchdev/switchdev.c
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@ -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)