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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>
hifive-unleashed-5.1
Roopa Prabhu 2015-03-21 10:27:28 -07:00 committed by David S. Miller
parent 08b4b8ea79
commit 558d51fa2f
1 changed files with 13 additions and 4 deletions
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17
net/switchdev/switchdev.c
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@ -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);
return ops->swdev_port_stp_update(dev, state);
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);