[RTNETLINK]: Link creation API

Add rtnetlink API for creating, changing and deleting software devices.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 58 insertions, 0 deletions

diff --git a/include/net/rtnetlink.h b/include/net/rtnetlink.h
index 3b3d4745618d..3861c05cdf0f 100644
--- a/include/net/rtnetlink.h
+++ b/include/net/rtnetlink.h
@@ -22,4 +22,62 @@ static inline int rtnl_msg_family(struct nlmsghdr *nlh)
                 return AF_UNSPEC;
 }
 
+/**
+ *      struct rtnl_link_ops - rtnetlink link operations
+ *
+ *      @list: Used internally
+ *      @kind: Identifier
+ *      @maxtype: Highest device specific netlink attribute number
+ *      @policy: Netlink policy for device specific attribute validation
+ *      @validate: Optional validation function for netlink/changelink parameters
+ *      @priv_size: sizeof net_device private space
+ *      @setup: net_device setup function
+ *      @newlink: Function for configuring and registering a new device
+ *      @changelink: Function for changing parameters of an existing device
+ *      @dellink: Function to remove a device
+ *      @get_size: Function to calculate required room for dumping device
+ *                 specific netlink attributes
+ *      @fill_info: Function to dump device specific netlink attributes
+ *      @get_xstats_size: Function to calculate required room for dumping devic
+ *                        specific statistics
+ *      @fill_xstats: Function to dump device specific statistics
+ */
+struct rtnl_link_ops {
+        struct list_head        list;
+
+        const char              *kind;
+
+        size_t                  priv_size;
+        void                    (*setup)(struct net_device *dev);
+
+        int                     maxtype;
+        const struct nla_policy *policy;
+        int                     (*validate)(struct nlattr *tb[],
+                                            struct nlattr *data[]);
+
+        int                     (*newlink)(struct net_device *dev,
+                                           struct nlattr *tb[],
+                                           struct nlattr *data[]);
+        int                     (*changelink)(struct net_device *dev,
+                                              struct nlattr *tb[],
+                                              struct nlattr *data[]);
+        void                    (*dellink)(struct net_device *dev);
+
+        size_t                  (*get_size)(const struct net_device *dev);
+        int                     (*fill_info)(struct sk_buff *skb,
+                                             const struct net_device *dev);
+
+        size_t                  (*get_xstats_size)(const struct net_device *dev);
+        int                     (*fill_xstats)(struct sk_buff *skb,
+                                               const struct net_device *dev);
+};
+
+extern int      __rtnl_link_register(struct rtnl_link_ops *ops);
+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);
+
+#define MODULE_ALIAS_RTNL_LINK(kind) MODULE_ALIAS("rtnl-link-" kind)
+
 #endif