Commit 558d51fa authored Mar 21, 2015 by Roopa Prabhu Committed by David S. Miller Mar 23, 2015

switchdev: fix stp update API to work with layered netdevices

make it same as the netdev_switch_port_bridge_setlink/dellink
api (ie traverse lowerdevs to get to the switch port).

removes "WARN_ON(!ops->ndo_switch_parent_id_get)" because
direct bridge ports can be stacked netdevices (like bonds
and team of switch ports) which may not implement this ndo.

v2 to v3:
	- remove changes to bond and team. Bring back the
	transparently following lowerdevs like i initially
	had for setlink/getlink
	(http://www.spinics.net/lists/netdev/msg313436.html

)
	dave and scott feldman also seem to prefer it be that
	way and move to non-transparent way of doing things
	if we see a problem down the lane.

v3 to v4:
	- fix ret initialization

v4 to v5:
	- return err on first failure (scott feldman)

v5 to v6:
	- change variable name (err) and initialize to
	-EOPNOTSUPP (scott feldman).

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Acked-by: Scott Feldman <sfeldma@gmail.com>
Acked-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 08b4b8ea

net/switchdev/switchdev.c

+13 −4

Original line number	Diff line number	Diff line
		@@ -47,11 +47,20 @@ EXPORT_SYMBOL_GPL(netdev_switch_parent_id_get);
		int netdev_switch_port_stp_update(struct net_device *dev, u8 state)
		{
		const struct swdev_ops *ops = dev->swdev_ops;
		struct net_device *lower_dev;
		struct list_head *iter;
		int err = -EOPNOTSUPP;

		if (!ops \|\| !ops->swdev_port_stp_update)
		return -EOPNOTSUPP;
		WARN_ON(!ops->swdev_parent_id_get);
		if (ops && ops->swdev_port_stp_update)
		return ops->swdev_port_stp_update(dev, state);

		netdev_for_each_lower_dev(dev, lower_dev, iter) {
		err = netdev_switch_port_stp_update(lower_dev, state);
		if (err && err != -EOPNOTSUPP)
		return err;
		}

		return err;
		}
		EXPORT_SYMBOL_GPL(netdev_switch_port_stp_update);