diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/block/block.h | 5 | ||||
| -rw-r--r-- | include/block/block_int.h | 6 |
2 files changed, 11 insertions, 0 deletions
diff --git a/include/block/block.h b/include/block/block.h index 6a758a76f8..b0c04f16c8 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -353,6 +353,11 @@ int bdrv_drop_intermediate(BlockDriverState *top, BlockDriverState *base, BlockDriverState *bdrv_find_overlay(BlockDriverState *active, BlockDriverState *bs); BlockDriverState *bdrv_find_base(BlockDriverState *bs); +bool bdrv_is_backing_chain_frozen(BlockDriverState *bs, BlockDriverState *base, + Error **errp); +int bdrv_freeze_backing_chain(BlockDriverState *bs, BlockDriverState *base, + Error **errp); +void bdrv_unfreeze_backing_chain(BlockDriverState *bs, BlockDriverState *base); typedef struct BdrvCheckResult { diff --git a/include/block/block_int.h b/include/block/block_int.h index a23cabaddd..438feba4e5 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -711,6 +711,12 @@ struct BdrvChild { uint64_t backup_perm; uint64_t backup_shared_perm; + /* + * This link is frozen: the child can neither be replaced nor + * detached from the parent. + */ + bool frozen; + QLIST_ENTRY(BdrvChild) next; QLIST_ENTRY(BdrvChild) next_parent; }; |