datapath: Add backport for genlmsg_new_unicast().

genlmsg_new_unicast() will be proposed upstream to support memory
mapped Netlink but on existing kernels it just uses genlmsg_new().

Signed-off-by: Jesse Gross <jesse@nicira.com>

diff --git a/datapath/linux/compat/include/net/genetlink.h b/datapath/linux/compat/include/net/genetlink.h
index 91be168..09ee23b 100644 (file)
--- a/datapath/linux/compat/include/net/genetlink.h
+++ b/datapath/linux/compat/include/net/genetlink.h
@@ -20,4 +20,13 @@
 extern void genl_notify(struct sk_buff *skb, struct net *net, u32 portid,
                        u32 group, struct nlmsghdr *nlh, gfp_t flags);
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,14,0)
+static inline struct sk_buff *genlmsg_new_unicast(size_t payload,
+                                                 struct genl_info *info,
+                                                 gfp_t flags)
+{
+       return genlmsg_new(payload, flags);
+}
+#endif
+
 #endif /* genetlink.h */