Re: Storing command line options in qcow2 images

Avi Kivity
2007-08-09T20:04:31Z

Anthony Liguori wrote:
> Avi Kivity wrote:
>> Anthony Liguori wrote:
>>
>>> I don't think adding annotations as snapshots is the right
>>> approach. I think proper support should be added in the header. I
>>> wouldn't be too concerned with breaking compatibility in qcow2.
>>> That's why it's qcow2 and not just an updated version of qcow, qcow2
>>> is still, AFAIK, open for breakage.
>>>
>>
>> Are all the users' images open for breakage too?
>>
>
> FWIW, you can extended the header without causing a breakage. Just
> bump the version, add the field, and add appropriate code. Of course,
> this is technically qcow v3 but it's a good opportunity to make things
> a bit sanier such that instead of check version == QCOW_VERSION that
> version >= QCOW_VERSION.
>

This sounds much better.