netdev - Re: [RFC PATCHv2 bridge 7/7] bridge: Add the ability to show dump the vlan map from a bridge port

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Date:	Mon, 24 Sep 2012 16:29:28 -0400
From:	Vlad Yasevich <vyasevic@...hat.com>
To:	Ben Hutchings <bhutchings@...arflare.com>
CC:	Stephen Hemminger <shemminger@...tta.com>,
	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [RFC PATCHv2 bridge 7/7] bridge: Add the ability to show dump
 the vlan map from a bridge port

On 09/24/2012 02:39 PM, Ben Hutchings wrote:
> On Mon, 2012-09-24 at 09:49 -0400, Vlad Yasevich wrote:
>> On 09/22/2012 04:05 PM, Stephen Hemminger wrote:
>>> On Sat, 22 Sep 2012 13:27:47 -0400 (EDT)
>>> David Miller <davem@...emloft.net> wrote:
>>>
>>>> From: Ben Hutchings <bhutchings@...arflare.com>
>>>> Date: Sat, 22 Sep 2012 18:15:32 +0100
>>>>
>>>>> On Wed, 2012-09-19 at 08:42 -0400, Vlad Yasevich wrote:
>>>>>> Using the RTM_GETLINK dump the vlan map of a given bridge port.
>>>>> [...]
>>>>>
>>>>> This enlarges the RTM_GETLINK response quite a bit.  I think perhaps
>>>>> this should be optional, like IFLA_VFINFO_LIST is now.
>>>>
>>>> Completely agreed.
>>>
>>> Since most users won't use it, it should be not necessary to include
>>> it if the map is blank.
>>>
>>
>> Response is included only for AF_BRIDGE calls (proably used by STP
>> implementation) and only when vlan filtering is configured.
>>
>> I do see the point though and can add a filter for this.
>
> I thought the per-AF stuff was included by default (or at least what
> most clients ask for).  If not then this is probably fine.
> IFLA_VFINFO_LIST was causing glibc's queries to fail and that must be
> avoided.
>
> Ben.
>

Not just that.  This is a PF_BRIDGE family request.  Note the
	err = __rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL,
                               br_dump_ifinfo, NULL);

in br_netlink_init.

-vlad
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