- qdict_put_bool(options, BDRV_OPT_FORCE_SHARE, true);
- }
- bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
- blk_old_backing = blk_new_open(backing_name, NULL,
- options, src_flags, &local_err);
- if (!blk_old_backing) {
- error_reportf_err(local_err,
- "Could not open old backing file '%s': ",
- backing_name);
- ret = -1;
- goto out;
+
+ if (force_share) {
+ if (!options) {
+ options = qdict_new();
+ }
+ qdict_put_bool(options, BDRV_OPT_FORCE_SHARE, true);
+ }
+ bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
+ blk_old_backing = blk_new_open(backing_name, NULL,
+ options, src_flags, &local_err);
+ if (!blk_old_backing) {
+ error_reportf_err(local_err,
+ "Could not open old backing file '%s': ",
+ backing_name);
+ ret = -1;
+ goto out;
+ }
+ } else {
+ blk_old_backing = NULL;