netdev - Re: Deleting a dynamic mac entry..

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Message-ID: <CA+N+6-xBtWg1+cUeCvdEK1fJbHHVdXpdORWvALosUZtWWG4C8g@mail.gmail.com>
Date:   Tue, 30 May 2017 18:50:35 -0700
From:   Manohar Kumar <forwardinglnx@...il.com>
To:     Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
Cc:     netdev@...r.kernel.org, bridge@...ts.linux-foundation.org
Subject: Re: Deleting a dynamic mac entry..

Please see inline..

On Fri, May 26, 2017 at 1:15 AM, Toshiaki Makita
<makita.toshiaki@....ntt.co.jp> wrote:
> On 2017/05/26 14:08, Manohar Kumar wrote:
>> On Wed, May 24, 2017 at 6:11 PM, Toshiaki Makita
>> <makita.toshiaki@....ntt.co.jp> wrote:
>>> On 2017/05/25 3:05, Manohar Kumar wrote:
>>>> Thanks, Toshiaki.
>>>>
>>>> What is the right way to set the default_pvid using the bridge command
>>>> ? I tried this, which fails..
>>>>
>>>> root@...-3:~# ip link set dev vxlan0 name untagged type vlan id 0
>>>> RTNETLINK answers: Operation not supported
>>>> root@...-3:~#
>>>>
>>>> All the interfaces in the bridge are untagged.
>>>
>>> # ip link set br0 down
>>> # echo 0 > /sys/class/net/br0/bridge/default_pvid
>>>
>>
>> I have the bridge inside a network namespace. There is no
>> /sys/class/net entry for the bridge interface inside the namespace.
>>
>> I see online references to this concept of 'tagged' sysfs directories
>> to support namespaces. But its not clear how to access the sysfs
>> entries for a particular namespace.
>
> Did you remount /sys after entering netns?

No, that was the problem. Mounting /sys did the trick. Appreciate your help.

Trying to understanding this better. How is the sysfs tree maintained
per network namespace ? I assume only the /sys/class/net is per
network namespace and the rest of the /sys is shared with the host
namespace ? Also, how does mounting /sys in the network namespace make
the new /sys/class/net tree visible ?

thanks,
Manohar.

> If not, remount /sys or use "ip netns" which automatically do it.
>
>> Is there any other way to set the default_pvid for the bridge
>> interface inside namespace ?
>
> No, as of 3.19.
>
>
> Toshiaki Makita
>