diff options
Diffstat (limited to 'block.c')
| -rw-r--r-- | block.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/block.c b/block.c index 0978e8cd59..2c3c7608ee 100644 --- a/block.c +++ b/block.c @@ -1192,6 +1192,13 @@ int bdrv_open_backing_file(BlockDriverState *bs, QDict *options, Error **errp) bdrv_get_full_backing_filename(bs, backing_filename, PATH_MAX); } + if (!bs->drv || !bs->drv->supports_backing) { + ret = -EINVAL; + error_setg(errp, "Driver doesn't support backing files"); + QDECREF(options); + goto free_exit; + } + backing_hd = bdrv_new("", errp); if (bs->backing_format[0] != '\0') { |