Re: grub-0.97: btrfs multidevice support [PATCH]

From: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
To: The development of GRUB 2 <grub-devel@gnu.org>
Cc: Colin Watson <cjwatson@ubuntu.com>,
	Bron Gondwana <brong@fastmail.fm>,
	Ric Wheeler <rwheeler@redhat.com>,
	The development of BTRFS <linux-btrfs@vger.kernel.org>,
	Chris Mason <chris.mason@oracle.com>
Subject: Re: grub-0.97: btrfs multidevice support [PATCH]
Date: Mon, 28 Sep 2009 09:47:50 +0200	[thread overview]
Message-ID: <4AC06A26.1020004@gmail.com> (raw)
In-Reply-To: <6149e97b0909271853g1de7abcage5356490e5a1d847@mail.gmail.com>

Peng Tao wrote:
> On Sun, Sep 27, 2009 at 6:18 PM, Robert Millan <rmh@aybabtu.com> wrote:
>   
>> On Sun, Sep 27, 2009 at 11:29:11AM +0800, Peng Tao wrote:
>>     
>>>> It would be great if somebody could take up Edward's work and port it to
>>>> GRUB 2. If nobody else does then I'd be interested in doing so myself,
>>>> although I will not be able to start for a month or two from now.
>>>>         
>>> Is there any guild lines for porting GPLv2 code to GRUB2? I've looked
>>> at the GRUB2 wiki but very few things are documented there
>>> (http://grub.enbug.org/). I'd like to see what it would take to port
>>> the patches. If I can afford it, I'd like to try.
>>>       
>> I assume you mean GPLv2-only code (as opposed to GPLv2-or-later). First
>> step would be to contact the copyright holders and ask them to relicense
>> under v3-compatible terms (e.g. GPLv2-or-later).  Chances are they didn't
>> chose these terms as an act of hostility, but were simply being zealous
>> about allowing something before they knew what it is.
>>
>> If that doesn't work, we'll always have Par^W clean room
>> (http://en.wikipedia.org/wiki/Clean_room_design).
>>     
> Edward's patch (stage2/fsys_btrfs.c) is declared GPLv2-or-later. But
> stage2/btrfs.h (which is extracted from btrfs-progs) is GPLv2-only. At
> the point, we only need a clean room for btrfs.h, right?
>   
Doing any clean room is needed only if other ways fail. And I hope
Oracle and btrfs contributors could agree to license under
GPLv3-compatible terms
> And I'm not sure what a clean room design in GRUB2 looks like. Is
> there an example?
>   
>> --
>> Robert Millan
>>
>>  The DRM opt-in fallacy: "Your data belongs to us. We will decide when (and
>>  how) you may access your data; but nobody's threatening your freedom: we
>>  still allow you to remove your data and not access it at all."
>>
>>
>> _______________________________________________
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>> Grub-devel@gnu.org
>> http://lists.gnu.org/mailman/listinfo/grub-devel
>>
>>     
>
>
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