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Date: Thu, 09 Apr 2015 17:08:47 +0300
From: Chrysostomos Nanakos <chris@include.gr>
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Subject: Re: [Qemu-devel] [PULL 22/62] block: Support Archipelago as a QEMU
 block backend
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To: Stefan Hajnoczi <stefanha@gmail.com>
Cc: Kevin Wolf <kwolf@redhat.com>, Peter Maydell <peter.maydell@linaro.org>, Jeff Cody <jcody@redhat.com>, qemu-devel <qemu-devel@nongnu.org>, Stefan Hajnoczi <stefanha@redhat.com>, =?UTF-8?Q?Andreas_F=C3=A4rber?= <afaerber@suse.de>

On 2015-04-09 17:05, Stefan Hajnoczi wrote:
> On Thu, Apr 9, 2015 at 1:48 PM, Chrysostomos Nanakos=20
> <chris@include.gr> wrote:
>> On 2015-04-09 06:48, Andreas F=C3=A4rber wrote:
>>>
>>> Am 08.08.2014 um 19:39 schrieb Kevin Wolf:
>>>>
>>>> From: Chrysostomos Nanakos <cnanakos@grnet.gr>
>>>>
>>>> VM Image on Archipelago volume is specified like this:
>>>>
>>>>
>>>>
>>>>=20
>>>> file.driver=3Darchipelago,file.volume=3D<volumename>[,file.mport=3D<=
mapperd_port>[,
>>>> file.vport=3D<vlmcd_port>][,file.segment=3D<segment_name>]]
>>>>
>>>> 'archipelago' is the protocol.
>>>>
>>>> 'mport' is the port number on which mapperd is listening. This is
>>>> optional
>>>> and if not specified, QEMU will make Archipelago to use the=20
>>>> default port.
>>>>
>>>> 'vport' is the port number on which vlmcd is listening. This is=20
>>>> optional
>>>> and if not specified, QEMU will make Archipelago to use the=20
>>>> default port.
>>>>
>>>> 'segment' is the name of the shared memory segment Archipelago=20
>>>> stack is
>>>> using.
>>>> This is optional and if not specified, QEMU will make Archipelago=20
>>>> to use
>>>> the
>>>> default value, 'archipelago'.
>>>>
>>>> Examples:
>>>>
>>>> file.driver=3Darchipelago,file.volume=3Dmy_vm_volume
>>>> file.driver=3Darchipelago,file.volume=3Dmy_vm_volume,file.mport=3D12=
3
>>>> file.driver=3Darchipelago,file.volume=3Dmy_vm_volume,file.mport=3D12=
3,
>>>> file.vport=3D1234
>>>> file.driver=3Darchipelago,file.volume=3Dmy_vm_volume,file.mport=3D12=
3,
>>>> file.vport=3D1234,file.segment=3Dmy_segment
>>>>
>>>> Signed-off-by: Chrysostomos Nanakos <cnanakos@grnet.gr>
>>>> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
>>>> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
>>>> ---
>>>>  MAINTAINERS         |   6 +
>>>>  block/Makefile.objs |   2 +
>>>>  block/archipelago.c | 787
>>>> ++++++++++++++++++++++++++++++++++++++++++++++++++++
>>>>  configure           |  40 +++
>>>>  4 files changed, 835 insertions(+)
>>>>  create mode 100644 block/archipelago.c
>>>
>>>
>>> Judging by configure output in v2.3.0-rc2, QEMU seems to rely on
>>> libxseg, which is GPL-3.0+: https://github.com/grnet/libxseg
>>>
>>> How can anyone legally build this backend then? o.O
>>>
>>> Any chance libxseg can be relicensed to GPL-2.0+?
>>>
>>
>> Hello Andreas,
>> indeed the license has changed a few months after submitting the=20
>> patch for
>> the block driver to QEMU. I have already contacted the=20
>> administration
>> of GRNET which is responsible for this change asking them about the
>> aforementioned problem. I am waiting for the reply and hopefully we=20
>> will
>> resolve this license matter.
>
> In the meantime I've sent a patch to disable Archipelago by default=20
> in
> ./configure ("[PATCH for-2.3] configure: disable by default and warn
> about libxseg GPLv3 license").  You are CCed on the email.
>
> The intention is to reduce the chance of users accidentally compiling
> binaries with license problems.  Archipelago support is still
> available but it must be explicitly enabled using ./configure
> --enable-archipelago.
>
> Stefan

For the moment I totally agree with the proposed patch.

Regards,
Chrysostomos.