Subject: Re: [PATCH net-next 1/2] dsa: bonding: implement HW bonding

From: roopa <[email-masked]>
Date: Fri, 20 Feb 2015 09:56:26 -0800

On 2/20/15, 8:41 AM, Florian Fainelli wrote:
> On 20/02/15 02:51, Jonas Johansson wrote:
>> From: Jonas Johansson <[email-masked]>
>>
>> This patch will implement hooks for hardware bonding support for the DSA
>> driver. When the team driver adds a DSA slave port the port will be assigned
>> a bond group id and the DSA slave driver can setup the hardware. When team
>> changes the port state (enabled/disabled) the DSA slave driver is able to
>> use the attach/detach callback which will allow the hardware to change the
>> hardware settings to reflect the state.
>>
>> Added DSA hooks:
>>   bond_add_group: To add a port to a bond group
>>   bond_del_group: To remove a port from a bond group
>>   bond_attach: To mark the port in a bond group as attached/active
>>   bond_detach: To unmark the port in a bond group as detach/inactive
>>
>> Added new network device hooks:
>>   ndo_bond_attach: To attach a device to a bond group.
>>   ndo_bond_detach: To detach a device from a bond group.
>>
>> Team:
>>   Added callback to ndo_bond_attach when port is enabled.
>>   Added callback to ndo_bond_detach when port is disabled.
>>
>> Added DSA notifier:
>>   Listening on NETDEV_CHANGEUPPER to add or deleta a port to/from a bond group.
>>
>> Signed-off-by: Jonas Johansson <[email-masked]>
>> ---
>>   drivers/net/team/team.c   |  4 ++++
>>   include/linux/netdevice.h |  8 +++++++
>>   include/net/dsa.h         |  8 +++++++
>>   net/dsa/dsa.c             | 60 +++++++++++++++++++++++++++++++++++++++++++++++
>>   net/dsa/dsa_priv.h        |  6 +++++
>>   net/dsa/slave.c           | 23 ++++++++++++++++++
>>   6 files changed, 109 insertions(+)
>>
>> diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c
>> index 0e62274..f7b2afb 100644
>> --- a/drivers/net/team/team.c
>> +++ b/drivers/net/team/team.c
>> @@ -934,6 +934,8 @@ static void team_port_enable(struct team *team,
>>   		team->ops.port_enabled(team, port);
>>   	team_notify_peers(team);
>>   	team_mcast_rejoin(team);
>> +	if (port->dev->netdev_ops->ndo_bond_attach)
>> +		port->dev->netdev_ops->ndo_bond_attach(port->dev);
>>   }
>>   
>>   static void __reconstruct_port_hlist(struct team *team, int rm_index)
>> @@ -965,6 +967,8 @@ static void team_port_disable(struct team *team,
>>   	team_adjust_ops(team);
>>   	team_notify_peers(team);
>>   	team_mcast_rejoin(team);
>> +	if (port->dev->netdev_ops->ndo_bond_detach)
>> +		port->dev->netdev_ops->ndo_bond_detach(port->dev);
>>   }
> Do we really need new ndos here? Cannot we learn this via
> NETDEV_CHANGEUPPER?

+1, I was just typing a similar response. We need this for switchdevices 
too and notifiers can be used here.