[IPV6]: Move nextheader offset to the IP6CB

Move nextheader offset to the IP6CB to make it possible to pass a
packet to ip6_input_finish multiple times and have it skip already
parsed headers. As a nice side effect this gets rid of the manual
hopopts skipping in ip6_input_finish.

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

3 files changed, 5 insertions, 4 deletions

diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index 93bbed5c6cf4..5cfc71529595 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -191,6 +191,7 @@ struct inet6_skb_parm {
         __u16                   srcrt;
         __u16                   dst1;
         __u16                   lastopt;
+        __u32                   nhoff;
 };
 
 #define IP6CB(skb)      ((struct inet6_skb_parm*)((skb)->cb))
diff --git a/include/net/protocol.h b/include/net/protocol.h
index 63f7db99c2a6..6dc5970612d7 100644
--- a/include/net/protocol.h
+++ b/include/net/protocol.h
@@ -43,7 +43,7 @@ struct net_protocol {
 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
 struct inet6_protocol 
 {
-        int     (*handler)(struct sk_buff **skb, unsigned int *nhoffp);
+        int     (*handler)(struct sk_buff **skb);
 
         void    (*err_handler)(struct sk_buff *skb,
                                struct inet6_skb_parm *opt,
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 07d7b50cdd76..297d09d28fe4 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -831,7 +831,7 @@ struct xfrm_tunnel {
 };
 
 struct xfrm6_tunnel {
-        int (*handler)(struct sk_buff **pskb, unsigned int *nhoffp);
+        int (*handler)(struct sk_buff **pskb);
         void (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
                             int type, int code, int offset, __u32 info);
 };
@@ -868,8 +868,8 @@ extern int xfrm4_rcv(struct sk_buff *skb);
 extern int xfrm4_output(struct sk_buff *skb);
 extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler);
 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler);
-extern int xfrm6_rcv_spi(struct sk_buff **pskb, unsigned int *nhoffp, u32 spi);
-extern int xfrm6_rcv(struct sk_buff **pskb, unsigned int *nhoffp);
+extern int xfrm6_rcv_spi(struct sk_buff **pskb, u32 spi);
+extern int xfrm6_rcv(struct sk_buff **pskb);
 extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler);
 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler);
 extern u32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr);