From d7741743f4f3d2683d1bb6938f88dc0167c21afa Mon Sep 17 00:00:00 2001 From: Eduardo Habkost Date: Thu, 10 Jan 2019 16:04:57 -0200 Subject: globals: Allow global properties to be optional MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Making some global properties optional will let us simplify compat code when a given property works on most (but not all) subclasses of a given type. Device types will be able to opt out from optional compat properties by simply not registering those properties. Signed-off-by: Eduardo Habkost Reviewed-by: Cornelia Huck Reviewed-by: Marc-André Lureau Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- qom/object.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'qom') diff --git a/qom/object.c b/qom/object.c index 4e5226c..b8c7320 100644 --- a/qom/object.c +++ b/qom/object.c @@ -385,6 +385,9 @@ void object_apply_global_props(Object *obj, const GPtrArray *props, Error **errp if (object_dynamic_cast(obj, p->driver) == NULL) { continue; } + if (p->optional && !object_property_find(obj, p->property, NULL)) { + continue; + } p->used = true; object_property_parse(obj, p->value, p->property, &err); if (err != NULL) { -- cgit v1.1