netdev - Re: Cannot set IPv6 address

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Date:   Thu, 17 Nov 2016 12:01:02 +0200
From:   Saeed Mahameed <saeedm@....mellanox.co.il>
To:     David Lebrun <david.lebrun@...ouvain.be>
Cc:     Linux Netdev List <netdev@...r.kernel.org>,
        Doron Tsur <doront@...lanox.com>,
        Majd Dibbiny <majd@...lanox.com>
Subject: Re: Cannot set IPv6 address

On Wed, Nov 16, 2016 at 5:34 PM, David Lebrun <david.lebrun@...ouvain.be> wrote:
> On 11/16/2016 04:22 PM, Saeed Mahameed wrote:
>> Hi David,
>>
>> The following commit introduced a new issue when setting IPv6 address
>> via the following command:
>>
>> /sbin/ip -6 addr add 2001:0db8:0:f112::1/64 dev enp2s2
>> RTNETLINK answers: Operation not supported
>>
>> Offending commit:
>>
>> commit 6c8702c60b88651072460f3f4026c7dfe2521d12
>
> Saeed,
>
> Do you have LWTUNNEL enabled ? This commit introduced a bug causing IPv6

Disabled.

> initialization to fail if LWTUNNEL is disabled. The patch has been
> submitted to the list and is pending approval from DaveM.
>
> If you see something like
>
> NET: Registered protocol family 10
> IPv6: Attempt to unregister permanent protocol 6
> IPv6: Attempt to unregister permanent protocol 136
> IPv6: Attempt to unregister permanent protocol 17
> NET: Unregistered protocol family 10
>
> in you dmesg logs then it would confirm my theory.
>
> Short fix: enable CONFIG_LWTUNNEL or apply patch in attachment
>
> David

Looks like the fix was applied [1],
Thanks for the quick response.

[1] https://patchwork.ozlabs.org/patch/695060/.