diff mbox series

[v2,1/5] block/dirty-bitmap: add lock to bdrv_enable/disable_dirty_bitmap

Message ID 20180606182449.1607-2-jsnow@redhat.com
State New
Headers show
Series block dirty bitmaps: support libvirt API | expand

Commit Message

John Snow June 6, 2018, 6:24 p.m. UTC 
From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>

Add locks and remove comments about BQL accordingly to
dirty_bitmap_mutex definition in block_int.h.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
---
 block/dirty-bitmap.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c
index 967159479d..56234257f4 100644
--- a/block/dirty-bitmap.c
+++ b/block/dirty-bitmap.c
@@ -442,18 +442,20 @@  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)