block: add bdrv_can_store_new_dirty_bitmap

This will be needed to check some restrictions before making bitmap
persistent in qmp-block-dirty-bitmap-add (this functionality will be
added by future patch)

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 20170628120530.31251-22-vsementsov@virtuozzo.com
Signed-off-by: Max Reitz <mreitz@redhat.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/block/block_int.h b/include/block/block_int.h
index 254f860972..c9e29bf65e 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -387,6 +387,10 @@ struct BlockDriver {
      * field of BlockDirtyBitmap's in case of success.
      */
     int (*bdrv_reopen_bitmaps_rw)(BlockDriverState *bs, Error **errp);
+    bool (*bdrv_can_store_new_dirty_bitmap)(BlockDriverState *bs,
+                                            const char *name,
+                                            uint32_t granularity,
+                                            Error **errp);
 
     QLIST_ENTRY(BlockDriver) list;
 };