qom: add child properties (composition) (v3)
Child properties express a relationship of composition.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/hw/qdev.c b/hw/qdev.c
index 2519f00..167f459 100644
--- a/hw/qdev.c
+++ b/hw/qdev.c
@@ -1174,6 +1174,32 @@
return qdev_root;
}
+static void qdev_get_child_property(DeviceState *dev, Visitor *v, void *opaque,
+ const char *name, Error **errp)
+{
+ DeviceState *child = opaque;
+ gchar *path;
+
+ path = qdev_get_canonical_path(child);
+ visit_type_str(v, &path, name, errp);
+ g_free(path);
+}
+
+void qdev_property_add_child(DeviceState *dev, const char *name,
+ DeviceState *child, Error **errp)
+{
+ gchar *type;
+
+ type = g_strdup_printf("child<%s>", child->info->name);
+
+ qdev_property_add(dev, name, type, qdev_get_child_property,
+ NULL, NULL, child, errp);
+
+ qdev_ref(child);
+
+ g_free(type);
+}
+
static gchar *qdev_get_path_in(DeviceState *parent, DeviceState *dev)
{
DeviceProperty *prop;