block: BDS options may lack the "driver" option
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 <mreitz@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Message-id: 20190201192935.18394-31-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
diff --git a/block.c b/block.c
index 9d9929e..35e78e2 100644
--- a/block.c
+++ b/block.c
@@ -5618,6 +5618,12 @@
}
}
+ 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;
}
