On 30.09.2016 12:53, Vladimir Sementsov-Ogievskiy wrote:
> Mirror AUTO flag from Qcow2 bitmap in BdrvDirtyBitmap. This will be
> needed in future, to save this flag back to Qcow2 for persistent
> bitmaps.
> 
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> ---
>  block/dirty-bitmap.c         | 15 +++++++++++++++
>  block/qcow2-bitmap.c         |  2 ++
>  include/block/dirty-bitmap.h |  2 ++
>  3 files changed, 19 insertions(+)
> 
> diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c
> index 90af372..623e1d1 100644
> --- a/block/dirty-bitmap.c
> +++ b/block/dirty-bitmap.c
> @@ -44,6 +44,7 @@ struct BdrvDirtyBitmap {
>      int64_t size;               /* Size of the bitmap (Number of sectors) */
>      bool disabled;              /* Bitmap is read-only */
>      int active_iterators;       /* How many iterators are active */
> +    bool autoload;              /* bitmap must be autoloaded on image opening */

I think a note that this is for persistent dirty bitmaps would be
useful, e.g.:

"/* For persistent bitmaps: Bitmap must be autoloaded [...] */"

Up to you, though, so however you decide:

Reviewed-by: Max Reitz <mreitz@redhat.com>