From e73a265e9f0fe4dfa376bffe78f121b85c7a5a03 Mon Sep 17 00:00:00 2001 From: Vladimir Sementsov-Ogievskiy Date: Tue, 13 Mar 2018 15:33:59 -0400 Subject: [PATCH] block/dirty-bitmap: add bdrv_dirty_bitmap_enable_successor() Enabling bitmap successor is necessary to enable successors of bitmaps being migrated before target vm start. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: John Snow Reviewed-by: Fam Zheng Message-id: 20180207155837.92351-2-vsementsov@virtuozzo.com Signed-off-by: John Snow --- block/dirty-bitmap.c | 8 ++++++++ include/block/dirty-bitmap.h | 1 + 2 files changed, 9 insertions(+) diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c index 909f0517f8..0d0e807216 100644 --- a/block/dirty-bitmap.c +++ b/block/dirty-bitmap.c @@ -234,6 +234,14 @@ int bdrv_dirty_bitmap_create_successor(BlockDriverState *bs, return 0; } +/* Called with BQL taken. */ +void bdrv_dirty_bitmap_enable_successor(BdrvDirtyBitmap *bitmap) +{ + qemu_mutex_lock(bitmap->mutex); + bdrv_enable_dirty_bitmap(bitmap->successor); + qemu_mutex_unlock(bitmap->mutex); +} + /** * For a bitmap with a successor, yield our name to the successor, * delete the old bitmap, and return a handle to the new bitmap. diff --git a/include/block/dirty-bitmap.h b/include/block/dirty-bitmap.h index 09efec609f..e0ebc96b01 100644 --- a/include/block/dirty-bitmap.h +++ b/include/block/dirty-bitmap.h @@ -21,6 +21,7 @@ BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BlockDriverState *bs, BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, Error **errp); +void bdrv_dirty_bitmap_enable_successor(BdrvDirtyBitmap *bitmap); BdrvDirtyBitmap *bdrv_find_dirty_bitmap(BlockDriverState *bs, const char *name); void bdrv_dirty_bitmap_make_anon(BdrvDirtyBitmap *bitmap);