From ed089506eeb44fd7f7f385a9172e51b198ae489d Mon Sep 17 00:00:00 2001 From: Vladimir Sementsov-Ogievskiy Date: Tue, 24 Aug 2021 11:38:24 +0300 Subject: [PATCH] block: introduce blk_replace_bs Add function to change bs inside blk. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Max Reitz Message-Id: <20210824083856.17408-3-vsementsov@virtuozzo.com> Signed-off-by: Hanna Reitz --- block/block-backend.c | 8 ++++++++ include/sysemu/block-backend.h | 1 + 2 files changed, 9 insertions(+) diff --git a/block/block-backend.c b/block/block-backend.c index deb55c272ea..6140d133e27 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -869,6 +869,14 @@ int blk_insert_bs(BlockBackend *blk, BlockDriverState *bs, Error **errp) return 0; } +/* + * Change BlockDriverState associated with @blk. + */ +int blk_replace_bs(BlockBackend *blk, BlockDriverState *new_bs, Error **errp) +{ + return bdrv_replace_child_bs(blk->root, new_bs, errp); +} + /* * Sets the permission bitmasks that the user of the BlockBackend needs. */ diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h index 9ac5f7bbd3a..29d4fdbf63f 100644 --- a/include/sysemu/block-backend.h +++ b/include/sysemu/block-backend.h @@ -102,6 +102,7 @@ BlockBackend *blk_by_public(BlockBackendPublic *public); BlockDriverState *blk_bs(BlockBackend *blk); void blk_remove_bs(BlockBackend *blk); int blk_insert_bs(BlockBackend *blk, BlockDriverState *bs, Error **errp); +int blk_replace_bs(BlockBackend *blk, BlockDriverState *new_bs, Error **errp); bool bdrv_has_blk(BlockDriverState *bs); bool bdrv_is_root_node(BlockDriverState *bs); int blk_set_perm(BlockBackend *blk, uint64_t perm, uint64_t shared_perm, -- 2.39.5