int system_if_down(struct device *dev);
int system_if_check(struct device *dev);
int system_if_dump_stats(struct device *dev, struct blob_buf *b);
+struct device *system_if_get_parent(struct device *dev);
int system_add_address(struct device *dev, struct device_addr *addr);
int system_del_address(struct device *dev, struct device_addr *addr);