dirty-bitmap: add bdrv_dirty_bitmap_next_dirty_area

The function alters bdrv_dirty_iter_next_area(), which is wrong and
less efficient (see further commit
"block/mirror: fix and improve do_sync_target_write" for description).

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c
index b162f4ac22..c1518373f9 100644
--- a/block/dirty-bitmap.c
+++ b/block/dirty-bitmap.c
@@ -787,6 +787,12 @@ int64_t bdrv_dirty_bitmap_next_zero(BdrvDirtyBitmap *bitmap, uint64_t offset,
     return hbitmap_next_zero(bitmap->bitmap, offset, bytes);
 }
 
+bool bdrv_dirty_bitmap_next_dirty_area(BdrvDirtyBitmap *bitmap,
+                                       uint64_t *offset, uint64_t *bytes)
+{
+    return hbitmap_next_dirty_area(bitmap->bitmap, offset, bytes);
+}
+
 void bdrv_merge_dirty_bitmap(BdrvDirtyBitmap *dest, const BdrvDirtyBitmap *src,
                              HBitmap **backup, Error **errp)
 {