qom: add container_get

This is QOM "mkdir -p".  It is useful when referring to
container objects such as "/machine".

Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/qom/container.c b/qom/container.c
index f107208867..67e9e8a6f8 100644
--- a/qom/container.c
+++ b/qom/container.c
@@ -12,6 +12,7 @@
 
 #include "qemu/object.h"
 #include "module.h"
+#include <assert.h>
 
 static TypeInfo container_info = {
     .name          = "container",
@@ -24,4 +25,26 @@ static void container_register_types(void)
     type_register_static(&container_info);
 }
 
+Object *container_get(const char *path)
+{
+    Object *obj, *child;
+    gchar **parts;
+    int i;
+
+    parts = g_strsplit(path, "/", 0);
+    assert(parts != NULL && parts[0] != NULL && !parts[0][0]);
+    obj = object_get_root();
+
+    for (i = 1; parts[i] != NULL; i++, obj = child) {
+        child = object_resolve_path_component(obj, parts[i]);
+        if (!child) {
+            child = object_new("container");
+            object_property_add_child(obj, parts[i], child, NULL);
+        }
+    }
+
+    return obj;
+}
+
+
 type_init(container_register_types)