diff options
-rw-r--r-- | block.c | 20 |
1 files changed, 13 insertions, 7 deletions
@@ -1438,13 +1438,19 @@ static int bdrv_open_common(BlockDriverState *bs, BlockBackend *file, bs->read_only = !(bs->open_flags & BDRV_O_RDWR); if (use_bdrv_whitelist && !bdrv_is_whitelisted(drv, bs->read_only)) { - error_setg(errp, - !bs->read_only && bdrv_is_whitelisted(drv, true) - ? "Driver '%s' can only be used for read-only devices" - : "Driver '%s' is not whitelisted", - drv->format_name); - ret = -ENOTSUP; - goto fail_opts; + if (!bs->read_only && bdrv_is_whitelisted(drv, true)) { + ret = bdrv_apply_auto_read_only(bs, NULL, NULL); + } else { + ret = -ENOTSUP; + } + if (ret < 0) { + error_setg(errp, + !bs->read_only && bdrv_is_whitelisted(drv, true) + ? "Driver '%s' can only be used for read-only devices" + : "Driver '%s' is not whitelisted", + drv->format_name); + goto fail_opts; + } } /* bdrv_new() and bdrv_close() make it so */ |