Re: [Qemu-devel] [PATCH v2 1/2] block: allow blockdev-backup from any source

[John Snow <jsnow@redhat.com>]

On 06/28/2018 02:05 PM, Eric Blake wrote:
> On 06/28/2018 01:00 PM, John Snow wrote:
>> In the case of image fleecing, the node we choose as the source
>> for a blockdev-backup is going to be both a root node AND the
>> backing node for the exported image. It does not qualify as a root
>> image in this case.
>>
>> Loosen the restriction.
>>
>> Signed-off-by: John Snow <jsnow@redhat.com>
>> ---
>>   blockdev.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> In v1, you mentioned that this used to work but then regressed,
> pinpointing that detail in the commit message might be nice, but not
> essential (since we didn't test it until now).  So,
> 

Really not sure when it regressed; I consider it unimportant as nothing
uses it presently: no docs, no tests, nothing in libvirt.

My guess, though, is that it worked prior to
cef34eebf3d0f252a3b3e9a2a459b6c3ecc56f68.

In 2.8, possibly?

Kashyap might know, I think he's experimented with this sometime in that
timezone.

> Reviewed-by: Eric Blake <eblake@redhat.com>
>