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Re: [Qemu-devel] [RFC] introduce a dynamic library to expose qemu block

From: Lluís Vilanova
Subject: Re: [Qemu-devel] [RFC] introduce a dynamic library to expose qemu block API
Date: Sat, 14 Jul 2012 01:55:07 +0300
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.1.50 (gnu/linux)

Paolo Bonzini writes:

> Il 13/07/2012 11:51, Paolo Bonzini ha scritto:
>> Il 13/07/2012 11:16, Stefan Hajnoczi ha scritto:
>>>> "Working around the QEMU block layer license" is not a goal per se,
>>>> especially because you haven't a) assessed _what_ is the GPL code that
>>>> the library would use; b) told us why the library should not be under
>>>> the GPL.
>>>> Please design first according to the functionality you want to
>>>> implement, then think about the implementation.
>>> Licensing is one headache but the real challenge is that the QEMU block
>>> layer relies on the QEMU main loop and a bunch of other architecture.
>> It doesn't really, not on Windows which has no AIO for example.  That's
>> why I suggested:
>> - assessing what code is GPL and what are the dependencies on it

> So I tried trimming down the list of files needed to compile
> qemu tools, and here is a list:

> Easy to relicense to LGPLv2+:
> block/raw.c                     none (GPLv2+: Red Hat, IBM)
> error.c                         LGPLv2 (Red Hat, IBM, Stefan Weil)
> iov.c                           GPLv2 (Red Hat, SuSE/Hannes Reinecke, Michael 
> Tokarev)
> module.c                        GPLv2 (Red Hat, IBM, Blue Swirl)
> qemu-error.c                    GPLv2+ (Red Hat, Blue Swirl, IBM)
> trace/control.c                 GPLv2 (Lluis Vilanova)
> trace/default.c                 GPLv2 (Lluis Vilanova)

> (I added some people to Cc.  Lluis and Michael, can you also look at
> http://wiki.qemu.org/Relicensing if you're willing to relicense
> your past contributions from GPLv2 to GPLv2+?.  Blue Swirl said 
> he'd accept any other GPLv2 or GPLv3 compatible license, which
> should include LGPLv2+).

I have no problems relicensing to "GPLv2 or later" or "GPLv3 or later".


 "And it's much the same thing with knowledge, for whenever you learn
 something new, the whole world becomes that much richer."
 -- The Princess of Pure Reason, as told by Norton Juster in The Phantom

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