1 files changed, 11 insertions, 0 deletions
diff --git a/interface.h b/interface.h
index 6620796..7f84060 100644
--- a/interface.h
+++ b/interface.h
@@ -33,6 +33,12 @@ struct interface_error {
 	const char *data[];
 };
 
+struct interface_user {
+	struct list_head list;
+	struct interface *iface;
+	void (*cb)(struct interface_user *dep, enum interface_event ev);
+};
+
 /*
  * interface configuration
  */
@@ -52,6 +58,8 @@ struct interface {
 	enum interface_state state;
 	enum interface_config_state config_state;
 
+	struct list_head users;
+
 	/* main interface that the interface is bound to */
 	struct device_user main_dev;
 
@@ -91,6 +99,9 @@ void interface_set_available(struct interface *iface, bool new_state);
 int interface_set_up(struct interface *iface);
 int interface_set_down(struct interface *iface);
 
+void interface_add_user(struct interface_user *dep, struct interface *iface);
+void interface_remove_user(struct interface_user *dep);
+
 int interface_add_link(struct interface *iface, struct device *llif);
 void interface_remove_link(struct interface *iface, struct device *llif);