[NET]: Add software TSOv4

This patch adds the GSO implementation for IPv4 TCP.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 97b0d2d1a6b0..a45bba9b8cbd 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1297,6 +1297,7 @@ extern void	       skb_split(struct sk_buff *skb,
                                  struct sk_buff *skb1, const u32 len);
 
 extern void            skb_release_data(struct sk_buff *skb);
+extern struct sk_buff *skb_segment(struct sk_buff *skb, int sg);
 
 static inline void *skb_header_pointer(const struct sk_buff *skb, int offset,
                                        int len, void *buffer)
diff --git a/include/net/protocol.h b/include/net/protocol.h
index bcaee39bd2ff..3b6dc15c68a5 100644
--- a/include/net/protocol.h
+++ b/include/net/protocol.h
@@ -36,6 +36,7 @@
 struct net_protocol {
         int                     (*handler)(struct sk_buff *skb);
         void                    (*err_handler)(struct sk_buff *skb, u32 info);
+        struct sk_buff         *(*gso_segment)(struct sk_buff *skb, int sg);
         int                     no_policy;
 };
 
diff --git a/include/net/tcp.h b/include/net/tcp.h
index b197a9e615c1..ca3d38dfc00b 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1086,6 +1086,8 @@ extern struct request_sock_ops tcp_request_sock_ops;
 
 extern int tcp_v4_destroy_sock(struct sock *sk);
 
+extern struct sk_buff *tcp_tso_segment(struct sk_buff *skb, int sg);
+
 #ifdef CONFIG_PROC_FS
 extern int  tcp4_proc_init(void);
 extern void tcp4_proc_exit(void);