Re: [Qemu-devel] tun/tap networking: patch for existing tun

[Anthony Liguori <aliguori@us.ibm.com>]

Jean-Christian de Rivaz wrote:

> Henrik Nordstrom a écrit :
>
>> On Sat, 1 Oct 2005, Jean-Christian de Rivaz wrote:
>>
>>> Attached is a patch proposition to allow opennig an existing tun 
>>> (already configured by root).
>>>
>>> This patch can work only on Linux as it make no change into the code 
>>> for BSD.
>>>
>>> Please make open comment about this to improve it or to let my know 
>>> why this if not a good thing...
>>
>>
>>
>> Quite similar to my patch posted some many months ago (and reposted 
>> some week ago on request).
>
>
> Yes. This is just an update of my first patch posted the 13 january 
> 2005 so it should apply without offset warning.

I don't understand, why is this patch needed?

It's a pretty simple C program to create a tun device by whatever name 
you want and just pass the fd to qemu via -tun-fd.  I think it's 
generally better to have the least number of options necessary to make 
things easier to understand.

Is it really something that so many people would want to use that it 
warrants making it an option?  Is there a concrete use-case that this 
enables?

Regards,

Anthony Liguori

> Maybe can I propose to joint our effort ?