[libvirt] [PATCH v3 04/10] block/dirty-bitmap: change semantics of enabled predicate

[Eric Blake]

On 2/22/19 6:06 PM, John Snow wrote:
> Currently, the enabled predicate means something like:
> "the QAPI status of the bitmap is ACTIVE."
> After this patch, it should mean exclusively:
> "This bitmap is recording guest writes, and is allowed to do so."
> 
> In many places, this is how this predicate was already used.
> Internal usages of the bitmap QPI can call user_locked to find out if
> the bitmap is in use by an operation.
> 
> To accommodate this, modify the create_successor routine to now
> explicitly disable the parent bitmap at creation time.
> 

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

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
Virtualization:  qemu.org | libvirt.org