netdev - Re: [PATCH net] team: team should sync the port's uc/mc addrs when add a port

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Message-ID: <CADvbK_ekaf+eCUmhuxo8UwsyWScXhJ6tzU=z1cNQ9W-jWZD7TQ@mail.gmail.com>
Date:	Tue, 29 Mar 2016 16:50:10 +0800
From:	Xin Long <lucien.xin@...il.com>
To:	Cong Wang <xiyou.wangcong@...il.com>
Cc:	network dev <netdev@...r.kernel.org>,
	David Miller <davem@...emloft.net>,
	Jiri Pirko <jiri@...nulli.us>,
	Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
Subject: Re: [PATCH net] team: team should sync the port's uc/mc addrs when
 add a port

On Tue, Mar 29, 2016 at 12:56 PM, Cong Wang <xiyou.wangcong@...il.com> wrote:
> On Mon, Mar 28, 2016 at 9:42 AM, Xin Long <lucien.xin@...il.com> wrote:
>> There is an issue when we use mavtap over team:
>> When we replug nic links from team0, the real nics's mc list will not
>> include the maddr for macvtap any more. then we can't receive pkts to
>> macvtap device, as they are filterred by mc list of nic.
>>
>> In Bonding Driver, it syncs the uc/mc addrs in bond_enslave().
>>
>> We will fix this issue on team by adding the port's uc/mc addrs sync in
>> team_port_add.
>>
>> Signed-off-by: Xin Long <lucien.xin@...il.com>
>> ---
>>  drivers/net/team/team.c | 3 +++
>>  1 file changed, 3 insertions(+)
>>
>> diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c
>> index 26c64d2..17ff367 100644
>> --- a/drivers/net/team/team.c
>> +++ b/drivers/net/team/team.c
>> @@ -1198,6 +1198,9 @@ static int team_port_add(struct team *team, struct net_device *port_dev)
>>                 goto err_dev_open;
>>         }
>>
>> +       dev_uc_sync_multiple(port_dev, dev);
>> +       dev_mc_sync_multiple(port_dev, dev);
>> +
>>         err = vlan_vids_add_by_dev(port_dev, dev);
>
> You need to call dev_{uc,mc}_unsync() on error path, don't you?

I think so, I'm gonna post another patch as a fix for this one.
Thanks, Cong.