[libvirt] [PATCH 2/2] qemu: migration: show disks stats for nbd migration

[Jiri Denemark]

On Tue, Dec 20, 2016 at 10:05:50 +0300, Nikolay Shirokovskiy wrote:
> There is no disks statistics when migrating with VIR_MIGRATE_NON_SHARED_*
> for qemu that supports nbd. The reason is that disks are copied via disk mirroring
> and not in the scope of migration job itself. Let's enhance qemuMigrationFetchJobStatus
> to take mirror jobs into account.
> 
> Now qemuMigrationFetchJobStatus fetches both migration and nbd stats and we
> need to skip fetching migration stats when migration is not running for
> virDomainGetJob{Info, Stats} paths. For this purpose check_status flag
> is added to qemuMigrationFetchJobStatus.

I don't think it's a good idea to misuse qemuMigrationFetchJobStatus for
fetching NBD migration statistics. Making a new function which can be
called explicitly when needed would be cleaner.

Jirka