Add list_bitmaps command

[dupondje]

Add list_bitmaps command to list bitmaps in the qcow2 image.

[dupondje]

This is still WIP, but having some questions here:

• There is no way to have a SDM command/job return something else than just the status?
• Or we want to extend SDM jobs to also be able to return a response?
• It might even be better/cleaner to extend getQemuImageInfo to return also bitmaps?
• Or just create the list_bitmaps command like getQemuImageInfo (without using SDM)

[dupondje]

@bennyz: See above :) This is VDSM side for oVirt/ovirt-engine#866

[bennyz]

This is still WIP, but having some questions here:

* There is no way to have a SDM command/job return something else than just the status?

* Or we want to extend SDM jobs to also be able to return a response?

This is intended for somewhat longer async operations, so not really

* It might even be better/cleaner to extend getQemuImageInfo to return also bitmaps?

* Or just create the list_bitmaps command like getQemuImageInfo (without using SDM)

This sounds like a better approach because this is a sync operation to perform a validation, I'll let vdsm maintainers decide

[aesteve-rh]

Sorry for the delay, but was out for a few days. And I wanted to check the code before giving an answer.

I agree with @bennyz. Both extend getQemuImageInfo or adding a new command are fit solutions here. Also, they will not interfere with other flows.

Thanks for the update!

[dupondje]

Let's merge #394 then. I fix the ovirt-engine code also then so it read's the args and uses them for validation.