When BDSs are created by qemu itself (e.g. as filters in block jobs),
they may not have a "driver" option in their options QDict. When
generating a json:{} filename, however, it must always be present.
Signed-off-by: Max Reitz <mre...@redhat.com>
Reviewed-by: Alberto Garcia <be...@igalia.com>
---
block.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/block.c b/block.c
index 44bebfc80c..b75276183b 100644
--- a/block.c
+++ b/block.c
@@ -5400,6 +5400,12 @@ static bool append_strong_runtime_options(QDict *d,
BlockDriverState *bs)
}
}
+ if (!qdict_haskey(d, "driver")) {
+ /* Drivers created with bdrv_new_open_driver() may not have a
+ * @driver option. Add it here. */
+ qdict_put_str(d, "driver", bs->drv->format_name);
+ }
+
return found_any;
}
--
2.19.2
