netdev - Re: [patch net-next v2 07/10] bridge: call netdev_sw_port_stp_update when bridge port STP status changes

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Date:	Mon, 10 Nov 2014 14:20:02 -0500
From:	Jamal Hadi Salim <jhs@...atatu.com>
To:	Thomas Graf <tgraf@...g.ch>
CC:	Jiri Pirko <jiri@...nulli.us>, netdev@...r.kernel.org,
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Subject: Re: [patch net-next v2 07/10] bridge: call netdev_sw_port_stp_update
 when bridge port STP status changes

On 11/10/14 09:04, Thomas Graf wrote:
> On 11/10/14 at 08:11am, Jamal Hadi Salim wrote:
>> You are unconditionally calling
>> netdev_sw_port_stp_update(p->dev, p->state);
>> Again issue is policy. Could you make this work the same
>> way the fdb_add e.g user intent of whether i want to turn
>> a port in hardware and/or software to disabled/learning/etc
>> is reflected?
>
> Agreed. Can be added in a next series perhaps?
>

Doesnt seem be hard to fix now. As Andy was pointing out, we have
the opportunity to get the basics right in the beggining.


> I think we can just extend the size of IFLA_BRPORT_STATE, accept
> both a u8 and u32, and return a u32 that that is compatible to
> existing u8 readers.
>

Iam thinking we have an opportunity for a totally different new
attribute instead of growing IFLA_BRPORT_STATE to add another bit.
Almost every single u8 that is being carried today in its own attribute
in the bridge code is in fact a boolean (0/1). We could leave just
intro IFLA_BRIDGE_FLAGS and use it for both FDB and BRPORT.

cheers,
jamal
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