[RFC 1/3] qdev-properties: alias all object class properties

[Stefan Hajnoczi <stefanha@redhat.com>]

qdev_alias_all_properties() aliases a DeviceState's qdev properties onto
an Object. This is used for VirtioPCIProxy types so that --device
virtio-blk-pci has properties of its embedded --device virtio-blk-device
object.

Currently this function is implemented using qdev properties. Change the
function to use QOM object class properties instead. This works because
qdev properties create QOM object class properties, but it also catches
any QOM object class-only properties that have no qdev properties.

This change ensures that properties of devices are shown with --device
foo,\? even if they are QOM object class properties.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 hw/core/qdev-properties.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c
index 357b8761b5..fbf3969d3c 100644
--- a/hw/core/qdev-properties.c
+++ b/hw/core/qdev-properties.c
@@ -959,16 +959,18 @@ void device_class_set_props(DeviceClass *dc, Property *props)
 void qdev_alias_all_properties(DeviceState *target, Object *source)
 {
     ObjectClass *class;
-    Property *prop;
+    ObjectPropertyIterator iter;
+    ObjectProperty *prop;
 
     class = object_get_class(OBJECT(target));
-    do {
-        DeviceClass *dc = DEVICE_CLASS(class);
 
-        for (prop = dc->props_; prop && prop->name; prop++) {
-            object_property_add_alias(source, prop->name,
-                                      OBJECT(target), prop->name);
+    object_class_property_iter_init(&iter, class);
+    while ((prop = object_property_iter_next(&iter))) {
+        if (object_property_find(source, prop->name)) {
+            continue; /* skip duplicate properties */
         }
-        class = object_class_get_parent(class);
-    } while (class != object_class_by_name(TYPE_DEVICE));
+
+        object_property_add_alias(source, prop->name,
+                                  OBJECT(target), prop->name);
+    }
 }
-- 
2.39.0