Re: [Qemu-devel] [PATCH V9 01/14] block: move bdrv_snapshot_find() to block/snapshot.c

[Wenchao Xia <xiawenc@linux.vnet.ibm.com>]

于 2013-3-13 0:22, Eric Blake 写道:
> On 03/12/2013 10:15 AM, Eric Blake wrote:
>> As far as I can tell, there is nothing wrong with leaving the file as
>> BSD licensed instead of trying to insist that it be LGPL.  The block
>> layer will still be [L]GPL because of other files linked together, but
>> there is nothing inherently wrong with linking a BSD file into an [L]GPL
>> product.  In other words, if you are okay with keeping the existing
>> looser BSD license on this file only, it still won't change the license
>> of the overall block layer, and it would save you the hassle of tracking
>> down earlier authors to ask for a relicense.
>
> Another alternative is to have two licenses covering appropriate
> portions of the file.  For example, aio-win32.c has two licenses: a
> GPL2-only license for older history, and a GPLv2+ license for all new
> changes.  In your case, you might be able to write a license that states
> that contents of code copied from other files is BSD, but all new
> contributions are LGPLv2+.
>
> But again, this is something where I suggest you get an official answer
> from a maintainer, and not just opinions from a random reviewer,
> regarding what approach you should take to licensing your code motion.
>

   Thanks for your comments, I am ignorant about licenses.
Dual license seems good to me. Paolo, can I have your opinion on
this?

-- 
Best Regards

Wenchao Xia