diff options
| -rw-r--r-- | block.c | 30 |
1 files changed, 0 insertions, 30 deletions
@@ -2210,13 +2210,6 @@ void bdrv_close_all(void) } } -/* Fields that need to stay with the top-level BDS */ -static void bdrv_move_feature_fields(BlockDriverState *bs_dest, - BlockDriverState *bs_src) -{ - /* move some fields that need to stay attached to the device */ -} - static void change_parent_backing_link(BlockDriverState *from, BlockDriverState *to) { @@ -2240,16 +2233,6 @@ static void change_parent_backing_link(BlockDriverState *from, } } -static void swap_feature_fields(BlockDriverState *bs_top, - BlockDriverState *bs_new) -{ - BlockDriverState tmp; - - bdrv_move_feature_fields(&tmp, bs_top); - bdrv_move_feature_fields(bs_top, bs_new); - bdrv_move_feature_fields(bs_new, &tmp); -} - /* * Add new bs contents at the top of an image chain while the chain is * live, while keeping required fields on the top layer. @@ -2273,9 +2256,6 @@ void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top) bdrv_ref(bs_top); - /* Some fields always stay on top of the backing file chain */ - swap_feature_fields(bs_top, bs_new); - change_parent_backing_link(bs_top, bs_new); bdrv_set_backing_hd(bs_new, bs_top); bdrv_unref(bs_top); @@ -2292,16 +2272,6 @@ void bdrv_replace_in_backing_chain(BlockDriverState *old, BlockDriverState *new) bdrv_ref(old); - if (old->blk) { - /* As long as these fields aren't in BlockBackend, but in the top-level - * BlockDriverState, it's not possible for a BDS to have two BBs. - * - * We really want to copy the fields from old to new, but we go for a - * swap instead so that pointers aren't duplicated and cause trouble. - * (Also, bdrv_swap() used to do the same.) */ - assert(!new->blk); - swap_feature_fields(old, new); - } change_parent_backing_link(old, new); /* Change backing files if a previously independent node is added to the |