int interface_add_link(struct interface *iface, struct device *dev);
int interface_remove_link(struct interface *iface, struct device *dev);
int interface_add_link(struct interface *iface, struct device *dev);
int interface_remove_link(struct interface *iface, struct device *dev);
void interface_add_error(struct interface *iface, const char *subsystem,
const char *code, const char **data, int n_data);
void interface_add_error(struct interface *iface, const char *subsystem,
const char *code, const char **data, int n_data);