[Qemu-devel] [PATCH 1/7] block/dirty-bitmap: add lock to bdrv_enable/disable_dirty_bitmap

[Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>]

Functions write to BdrvDirtyBitmap field, so the should take the lock.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
 block/dirty-bitmap.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c
index 967159479d..6c00288fd7 100644
--- a/block/dirty-bitmap.c
+++ b/block/dirty-bitmap.c
@@ -445,15 +445,19 @@ void bdrv_remove_persistent_dirty_bitmap(BlockDriverState *bs,
 /* Called with BQL taken.  */
 void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap *bitmap)
 {
+    bdrv_dirty_bitmap_lock(bitmap);
     assert(!bdrv_dirty_bitmap_frozen(bitmap));
     bitmap->disabled = true;
+    bdrv_dirty_bitmap_unlock(bitmap);
 }
 
 /* Called with BQL taken.  */
 void bdrv_enable_dirty_bitmap(BdrvDirtyBitmap *bitmap)
 {
+    bdrv_dirty_bitmap_lock(bitmap);
     assert(!bdrv_dirty_bitmap_frozen(bitmap));
     bitmap->disabled = false;
+    bdrv_dirty_bitmap_unlock(bitmap);
 }
 
 BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs)
-- 
2.11.1