2 files changed, 50 insertions, 0 deletions

diff --git a/include/linux/if_link.h b/include/linux/if_link.h
index 2fc66dd783e..443d04a66a7 100644
--- a/include/linux/if_link.h
+++ b/include/linux/if_link.h
@@ -80,6 +80,24 @@ struct rtnl_link_ifmap {
 	__u8	port;
 };
 
+/*
+ * IFLA_AF_SPEC
+ *   Contains nested attributes for address family specific attributes.
+ *   Each address family may create a attribute with the address family
+ *   number as type and create its own attribute structure in it.
+ *
+ *   Example:
+ *   [IFLA_AF_SPEC] = {
+ *       [AF_INET] = {
+ *           [IFLA_INET_CONF] = ...,
+ *       },
+ *       [AF_INET6] = {
+ *           [IFLA_INET6_FLAGS] = ...,
+ *           [IFLA_INET6_CONF] = ...,
+ *       }
+ *   }
+ */
+
 enum {
 	IFLA_UNSPEC,
 	IFLA_ADDRESS,
@@ -116,6 +134,7 @@ enum {
 	IFLA_STATS64,
 	IFLA_VF_PORTS,
 	IFLA_PORT_SELF,
+	IFLA_AF_SPEC,
 	__IFLA_MAX
 };
 
diff --git a/include/net/rtnetlink.h b/include/net/rtnetlink.h
index e013c68bfb0..35be0bbcd7d 100644
--- a/include/net/rtnetlink.h
+++ b/include/net/rtnetlink.h
@@ -83,6 +83,37 @@ extern void	__rtnl_link_unregister(struct rtnl_link_ops *ops);
 extern int	rtnl_link_register(struct rtnl_link_ops *ops);
 extern void	rtnl_link_unregister(struct rtnl_link_ops *ops);
 
+/**
+ * 	struct rtnl_af_ops - rtnetlink address family operations
+ *
+ *	@list: Used internally
+ * 	@family: Address family
+ * 	@fill_link_af: Function to fill IFLA_AF_SPEC with address family
+ * 		       specific netlink attributes.
+ * 	@get_link_af_size: Function to calculate size of address family specific
+ * 			   netlink attributes exlusive the container attribute.
+ * 	@parse_link_af: Function to parse a IFLA_AF_SPEC attribute and modify
+ *			net_device accordingly.
+ */
+struct rtnl_af_ops {
+	struct list_head	list;
+	int			family;
+
+	int			(*fill_link_af)(struct sk_buff *skb,
+						const struct net_device *dev);
+	size_t			(*get_link_af_size)(const struct net_device *dev);
+
+	int			(*parse_link_af)(struct net_device *dev,
+						 const struct nlattr *attr);
+};
+
+extern int	__rtnl_af_register(struct rtnl_af_ops *ops);
+extern void	__rtnl_af_unregister(struct rtnl_af_ops *ops);
+
+extern int	rtnl_af_register(struct rtnl_af_ops *ops);
+extern void	rtnl_af_unregister(struct rtnl_af_ops *ops);
+
+
 extern struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]);
 extern struct net_device *rtnl_create_link(struct net *src_net, struct net *net,
 	char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[]);