Provide a mechanism to walk through each property for an object.

Signed-off-by: Anthony Liguori <aligu...@us.ibm.com>
---
 include/qemu/object.h |   26 ++++++++++++++++++++++++++
 qom/object.c          |   10 ++++++++++
 2 files changed, 36 insertions(+), 0 deletions(-)

diff --git a/include/qemu/object.h b/include/qemu/object.h
index ca1649c..4ad6758 100644
--- a/include/qemu/object.h
+++ b/include/qemu/object.h
@@ -915,5 +915,31 @@ void object_property_add_str(Object *obj, const char *name,
  */
 Object *container_get(Object *root, const char *path);
 
+/**
+ * ObjectPropertyEnumerator:
+ * @obj: the object the property belongs to
+ * @name: the name of the property
+ * @typename: the string typename the property was created with
+ * @read_only: if #true, the property is read-only
+ * @opaque: the opaque handle passed to @object_property_foreach
+ *
+ * Callback function type for @object_property_foreach
+ */
+typedef void (ObjectPropertyEnumerator)(Object *obj,
+                                        const char *name,
+                                        const char *typename,
+                                        bool read_only,
+                                        void *opaque);
+
+/**
+ * object_property_foreach:
+ * @path: object to enumerate properties in
+ * @fn: callback function that will be invoked for each property
+ * @opaque: opaque to pass to @fn
+ *
+ * Enumerate all properties in an existing object.
+ */
+void object_property_foreach(Object *obj, ObjectPropertyEnumerator *fn,
+                             void *opaque);
 
 #endif
diff --git a/qom/object.c b/qom/object.c
index e721fc2..94928c5 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -1194,3 +1194,13 @@ void object_property_add_str(Object *obj, const char 
*name,
                         property_release_str,
                         prop, errp);
 }
+
+void object_property_foreach(Object *obj, ObjectPropertyEnumerator *fn,
+                             void *opaque)
+{
+    ObjectProperty *prop;
+
+    QTAILQ_FOREACH(prop, &obj->properties, node) {
+        fn(obj, prop->name, prop->type, !prop->set, opaque);
+    }
+}
-- 
1.7.5.4


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