Subject: Re: [PATCH net-next 3/4] net: Add IPv6 support to VRF device

From: David Ahern <[email-masked]>
Date: Wed, 7 Oct 2015 12:46:19 -0600

On 10/7/15 12:42 PM, Cong Wang wrote:
> On Wed, Oct 7, 2015 at 9:50 AM, David Ahern <[email-masked]> wrote:
>> Add support for IPv6 to VRF device driver. Implemenation parallels what
>> has been done for IPv4.
> [...]
>> diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
>> index b9ebd0d18a52..c878a0bc2137 100644
>> --- a/drivers/net/Kconfig
>> +++ b/drivers/net/Kconfig
>> @@ -300,6 +300,7 @@ config NET_VRF
>>          tristate "Virtual Routing and Forwarding (Lite)"
>>          depends on IP_MULTIPLE_TABLES && IPV6_MULTIPLE_TABLES
>>          depends on NET_L3_MASTER_DEV
>> +       depends on IPV6
>
> So vrf will stop functioning without IPV6? This doesn't look correct...
>

The new functionality does. The inter-module/builtin dependencies are a 
nightmare. I either make VRF device require IPV6 like the IPVLAN driver 
does or I split the module into 2 -- 1 for IPv4 and 1 for IPv6.

David