Hi Jiri,
Jiri Pirko <j...@resnulli.us> writes:
> Wed, Mar 09, 2016 at 07:32:13PM CET, and...@lunn.ch wrote:
>>Hi Vivien
>>
>>> -static bool dsa_slave_dev_check(struct net_device *dev)
>>> -{
>>> - return dev->netdev_ops == &dsa_slave_netdev_ops;
>>> -}
>>
>>Where is the equivalent of this happening? Where do we check that the
>>interface added to the bridge is part of the switch?
>>
>>> -int dsa_slave_netdevice_event(struct notifier_block *unused,
>>> - unsigned long event, void *ptr)
>>> -{
>>> - struct net_device *dev;
>>> - int err = 0;
>>> -
>>> - switch (event) {
>>> - case NETDEV_CHANGEUPPER:
>>> - dev = netdev_notifier_info_to_dev(ptr);
>>> - if (!dsa_slave_dev_check(dev))
>>> - goto out;
>>> -
>>> - err = dsa_slave_master_changed(dev);
>>> - if (err && err != -EOPNOTSUPP)
>>> - netdev_warn(dev, "failed to reflect master change\n");
>>> -
>>> - break;
>>> - }
>>> -
>>> -out:
>>> - return NOTIFY_DONE;
>>> -}
>>
>>How about team/bonding? We are not ready to implement it yet with the
>>Marvell devices, but at some point we probably will. Won't we need the
>>events then? We need to know when a switch port has been added to a
>>team?
>>
>>Or do you think a switchdev object will be added for this case?
>>Mellanox already have the ability to add switch interfaces to a team,
>>and then add the team to a bridge. So we need to ensure your solution
>>works for such stacked systems.
>
> I have to look at this more closer tomorrow, but I'm missing motivation
> behind this. Using existing notifiers, drivers can easily monitor what
> is going on with their uppers. Why do we need this to be changed?
Yes with notifiers, drivers can monitor these changes with the
NETDEV_CHANGEUPPER even. They can also forbid such bridging by returning
NOTIFY_BAD in the NETDEV_PRECHANGEUPPER event if I'm not mistaken.
But looking at DSA slave, Mellanox Spectrum, and Rocker, they all
implement this similar heavy code, while they could support a common
switchdev attribute and reduce boilerplate.
But maybe I'm wrong, what why I sent that as an RFC :-)
Thanks,
Vivien
