diff options
Diffstat (limited to 'block.c')
| -rw-r--r-- | block.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/block.c b/block.c index e97ce0b1c8..b2b66263f9 100644 --- a/block.c +++ b/block.c @@ -5048,6 +5048,37 @@ out: return ret; } +/* Not for empty child */ +int bdrv_replace_child_bs(BdrvChild *child, BlockDriverState *new_bs, + Error **errp) +{ + int ret; + Transaction *tran = tran_new(); + g_autoptr(GHashTable) found = NULL; + g_autoptr(GSList) refresh_list = NULL; + BlockDriverState *old_bs = child->bs; + + bdrv_ref(old_bs); + bdrv_drained_begin(old_bs); + bdrv_drained_begin(new_bs); + + bdrv_replace_child_tran(child, new_bs, tran); + + found = g_hash_table_new(NULL, NULL); + refresh_list = bdrv_topological_dfs(refresh_list, found, old_bs); + refresh_list = bdrv_topological_dfs(refresh_list, found, new_bs); + + ret = bdrv_list_refresh_perms(refresh_list, NULL, tran, errp); + + tran_finalize(tran, ret); + + bdrv_drained_end(old_bs); + bdrv_drained_end(new_bs); + bdrv_unref(old_bs); + + return ret; +} + static void bdrv_delete(BlockDriverState *bs) { assert(bdrv_op_blocker_is_empty(bs)); |