+--- a/include/linux/genetlink.h
++++ b/include/linux/genetlink.h
+@@ -39,6 +39,9 @@ enum {
+ CTRL_CMD_NEWOPS,
+ CTRL_CMD_DELOPS,
+ CTRL_CMD_GETOPS,
++ CTRL_CMD_NEWMCAST_GRP,
++ CTRL_CMD_DELMCAST_GRP,
++ CTRL_CMD_GETMCAST_GRP, /* unused */
+ __CTRL_CMD_MAX,
+ };
+
+@@ -52,6 +55,7 @@ enum {
+ CTRL_ATTR_HDRSIZE,
+ CTRL_ATTR_MAXATTR,
+ CTRL_ATTR_OPS,
++ CTRL_ATTR_MCAST_GROUPS,
+ __CTRL_ATTR_MAX,
+ };
+
+@@ -66,4 +70,13 @@ enum {
+
+ #define CTRL_ATTR_OP_MAX (__CTRL_ATTR_OP_MAX - 1)
+
++enum {
++ CTRL_ATTR_MCAST_GRP_UNSPEC,
++ CTRL_ATTR_MCAST_GRP_NAME,
++ CTRL_ATTR_MCAST_GRP_ID,
++ __CTRL_ATTR_MCAST_GRP_MAX,
++};
++
++#define CTRL_ATTR_MCAST_GRP_MAX (__CTRL_ATTR_MCAST_GRP_MAX - 1)
++
+ #endif /* __LINUX_GENERIC_NETLINK_H */