[PULL 10/10] block/qcow2-bitmap: use bdrv_dirty_bitmap_next_dirty

[John Snow <jsnow@redhat.com>]

From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>

store_bitmap_data() loop does bdrv_set_dirty_iter() on each iteration,
which means that we actually don't need iterator itself and we can use
simpler bitmap API.

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: 20200205112041.6003-11-vsementsov@virtuozzo.com
Signed-off-by: John Snow <jsnow@redhat.com>
---
 block/qcow2-bitmap.c | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/block/qcow2-bitmap.c b/block/qcow2-bitmap.c
index 8cccc2c9f3..cb06954b4a 100644
--- a/block/qcow2-bitmap.c
+++ b/block/qcow2-bitmap.c
@@ -1288,7 +1288,6 @@ static uint64_t *store_bitmap_data(BlockDriverState *bs,
     uint64_t bm_size = bdrv_dirty_bitmap_size(bitmap);
     const char *bm_name = bdrv_dirty_bitmap_name(bitmap);
     uint8_t *buf = NULL;
-    BdrvDirtyBitmapIter *dbi;
     uint64_t *tb;
     uint64_t tb_size =
             size_to_clusters(s,
@@ -1307,12 +1306,14 @@ static uint64_t *store_bitmap_data(BlockDriverState *bs,
         return NULL;
     }
 
-    dbi = bdrv_dirty_iter_new(bitmap);
     buf = g_malloc(s->cluster_size);
     limit = bytes_covered_by_bitmap_cluster(s, bitmap);
     assert(DIV_ROUND_UP(bm_size, limit) == tb_size);
 
-    while ((offset = bdrv_dirty_iter_next(dbi)) >= 0) {
+    offset = 0;
+    while ((offset = bdrv_dirty_bitmap_next_dirty(bitmap, offset, INT64_MAX))
+           >= 0)
+    {
         uint64_t cluster = offset / limit;
         uint64_t end, write_size;
         int64_t off;
@@ -1355,23 +1356,17 @@ static uint64_t *store_bitmap_data(BlockDriverState *bs,
             goto fail;
         }
 
-        if (end >= bm_size) {
-            break;
-        }
-
-        bdrv_set_dirty_iter(dbi, end);
+        offset = end;
     }
 
     *bitmap_table_size = tb_size;
     g_free(buf);
-    bdrv_dirty_iter_free(dbi);
 
     return tb;
 
 fail:
     clear_bitmap_table(bs, tb, tb_size);
     g_free(buf);
-    bdrv_dirty_iter_free(dbi);
     g_free(tb);
 
     return NULL;
-- 
2.21.1