Re: blktap3 as a block device?

["Roger Pau Monné" <roger.pau@citrix.com>]

On 26/11/12 11:54, Thanos Makatos wrote:
> 
> 
>> -----Original Message-----
>> From: Ian Campbell
>> Sent: 26 November 2012 10:45
>> To: Darren Shepherd
>> Cc: Fajar A. Nugraha; xen-devel@lists.xen.org; Thanos Makatos
>> Subject: Re: [Xen-devel] blktap3 as a block device?
>>
>> On Sat, 2012-11-24 at 01:08 +0000, Darren Shepherd wrote:
>>> The more direct question is going forward with blktap3 is there going
>>> to be a way to see the blktap device as a block device in dom0?
>>
>> There will have to be, e.g. to support pygrub and similar uses.
>>
>> I'm not sure what form this will eventually take though (CCing Thanos,
>> blktap3 maintainer). Ideas which I've heard floating about are to have
>> tapdisk export an nbd server or supporting running a vbd device in dom0
>> in a loopback type mode.
> 
> Yes this is one of the possibilities; this functionality is already on blktap2.5 (where blktap3 is based on).
> 
> Another idea could be to use both blkfront and tapdisk on dom0, haven't considered that thoroughly though.

>From my point of view using blkfront on Dom0 should be used instead of
nbd. nbd is Linux specific, on the other hand all Dom0s have a blkfront
implementation.