On 01.10.19 15:14, Vladimir Sementsov-Ogievskiy wrote:
> Backup-top filter caches write operations and does copy-before-write
> operations.
> 
> The driver will be used in backup instead of write-notifiers.
> 
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> ---
>  block/backup-top.h  |  41 +++++++
>  block/backup-top.c  | 281 ++++++++++++++++++++++++++++++++++++++++++++
>  block/Makefile.objs |   1 +
>  3 files changed, 323 insertions(+)
>  create mode 100644 block/backup-top.h
>  create mode 100644 block/backup-top.c

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