kabi: add early_demux_handler and early_demux back to fix kabi broken in...

kabi: add early_demux_handler and early_demux back to fix kabi broken in struct net_protocol and inet6_protocol

Offering: HULK
hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I6D0ZE

--------------------------------

Add early_demux_handler and early_demux back to fix kabi broken in
struct net_protocol and inet6_protocol.
Signed-off-by: NWang Yufen <wangyufen@huawei.com>
Reviewed-by: NLiu Jian <liujian56@huawei.com>
Signed-off-by: NJialin Zhang <zhangjialin11@huawei.com>

include/net/protocol.h

@@ -35,6 +35,8 @@
 
 /* This is used to register protocols. */
 struct net_protocol {
+	int			(*early_demux)(struct sk_buff *skb);
+	int			(*early_demux_handler)(struct sk_buff *skb);
 	int			(*handler)(struct sk_buff *skb);
 
 	/* This returns an error if we weren't able to handle the error. */
@@ -51,6 +53,8 @@ struct net_protocol {
 
 #if IS_ENABLED(CONFIG_IPV6)
 struct inet6_protocol {
+	void	(*early_demux)(struct sk_buff *skb);
+	void    (*early_demux_handler)(struct sk_buff *skb);
 	int	(*handler)(struct sk_buff *skb);
 
 	/* This returns an error if we weren't able to handle the error. */