netdev - Re: [patch net-next] bonding: allow to add vlans on top of empty bond

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Date:	Wed, 2 Jul 2014 11:13:16 +0200
From:	Jiri Pirko <jiri@...nulli.us>
To:	Michal Kubecek <mkubecek@...e.cz>
Cc:	Jay Vosburgh <jay.vosburgh@...onical.com>,
	Tom Gundersen <teg@...m.no>, netdev <netdev@...r.kernel.org>,
	David Miller <davem@...emloft.net>, vfalico@...il.com,
	andy@...yhouse.net
Subject: Re: [patch net-next] bonding: allow to add vlans on top of empty bond

Wed, Jul 02, 2014 at 11:05:17AM CEST, mkubecek@...e.cz wrote:
>On Wed, Jul 02, 2014 at 10:46:52AM +0200, Jiri Pirko wrote:
>> Fri, Jun 27, 2014 at 06:08:50PM CEST, jay.vosburgh@...onical.com wrote:
>> >
>> >        if (!bond_has_slaves(bond)) {
>> >                bond_set_carrier(bond);
>> >                eth_hw_addr_random(bond_dev);
>> >
>> >                if (vlan_uses_dev(bond_dev)) {
>> >                        pr_warn("%s: Warning: clearing HW address of %s while it still has VLANs\n",
>> >                                bond_dev->name, bond_dev->name);
>> >                        pr_warn("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs\n",
>> >                                bond_dev->name);
>> >                }
>> >        }
>> >
>> >	This warning may not be useful any longer, since the MAC should
>> >update correctly without user action when re-adding the first slave.
>> 
>> I just checked. The vlan dev holds its addr. So when new slave is added,
>> bond addr is changed to it, but vlan addr remains the same. So the
>> second warning still stands.
>
>Is it a problem? Since we have proper uc_list propagation, vlan should
>work even if its address doesn't match the bond.

You are right, vlan_sync_address() should take care of it.

I'll send a patch removing these 2 warnings. Thanks.

>
>                                                        Michal Kubecek
>
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