netdev - Re: [PATCH net-next 1/4] ipip: allow to deactivate the creation of fb dev

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Message-ID: <50A66DD3.20807@6wind.com>
Date:	Fri, 16 Nov 2012 17:46:11 +0100
From:	Nicolas Dichtel <nicolas.dichtel@...nd.com>
To:	Stephen Hemminger <shemminger@...tta.com>
CC:	netdev@...r.kernel.org, davem@...emloft.net
Subject: Re: [PATCH net-next 1/4] ipip: allow to deactivate the creation of
 fb dev

Le 16/11/2012 17:29, Stephen Hemminger a écrit :
> On Fri, 16 Nov 2012 17:14:13 +0100
> Nicolas Dichtel <nicolas.dichtel@...nd.com> wrote:
>
>> Now that tunnels can be configured via rtnetlink, this device is not mandatory.
>> The default is conservative.
>>
>> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@...nd.com>
>
>
> Although I am in favor of reducing clutter, and we even have to put in special case
> code to ignore these stub devices in the Vyatta scripts. Module parameters are bit of a nuisance to deal with, but maybe
> the only way for this kind of thing and keep the required ABI.
>
> Not sure if I can fully endorse this. The device may still have uses.
> It is still useful for capturing "none of the above" packets
If you need to capture these packets, you can still create a tunnel with local 
any and remote any, even if the fb_device has not been created.

> and is used to auto-load module via module aliases.
Right, but if user uses netlink, the problem exists without these patches too.

By default, the fb device is created, so there is no change if you don't set 
explicitly setup_fb to 0.
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