[IPV6]: Introduce inet6_rsk()

And inet6_rsk_offset in inet_request_sock, for the same reasons as
inet_sock's pinfo6 member.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 37 insertions, 6 deletions

diff --git a/include/linux/ip.h b/include/linux/ip.h
index 33e8a19a1a0..5a560daeade 100644
--- a/include/linux/ip.h
+++ b/include/linux/ip.h
@@ -110,6 +110,10 @@ struct ip_options {
 
 struct inet_request_sock {
 	struct request_sock	req;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	u16			inet6_rsk_offset;
+	/* 2 bytes hole, try to pack */
+#endif
 	u32			loc_addr;
 	u32			rmt_addr;
 	u16			rmt_port;
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index e0b922785d9..7d3e86d9576 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -199,18 +199,17 @@ static inline int inet6_iif(const struct sk_buff *skb)
 	return IP6CB(skb)->iif;
 }
 
-struct tcp6_request_sock {
-	struct tcp_request_sock	req;
+struct inet6_request_sock {
 	struct in6_addr		loc_addr;
 	struct in6_addr		rmt_addr;
 	struct sk_buff		*pktopts;
 	int			iif;
 };
 
-static inline struct tcp6_request_sock *tcp6_rsk(const struct request_sock *sk)
-{
-	return (struct tcp6_request_sock *)sk;
-}
+struct tcp6_request_sock {
+	struct tcp_request_sock	  tcp6rsk_tcp;
+	struct inet6_request_sock tcp6rsk_inet6;
+};
 
 /**
  * struct ipv6_pinfo - ipv6 private area
@@ -304,6 +303,28 @@ static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
 	return inet_sk(__sk)->pinet6;
 }
 
+static inline struct inet6_request_sock *
+			inet6_rsk(const struct request_sock *rsk)
+{
+	return (struct inet6_request_sock *)(((u8 *)rsk) +
+					     inet_rsk(rsk)->inet6_rsk_offset);
+}
+
+static inline u32 inet6_rsk_offset(struct request_sock *rsk)
+{
+	return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
+}
+
+static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
+{
+	struct request_sock *req = reqsk_alloc(ops);
+
+	if (req != NULL)
+		inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
+
+	return req;
+}
+
 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
 {
 	return (struct raw6_sock *)sk;
@@ -361,6 +382,12 @@ static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
 	return NULL;
 }
 
+static inline struct inet6_request_sock *
+			inet6_rsk(const struct request_sock *rsk)
+{
+	return NULL;
+}
+
 static inline struct raw6_sock *raw6_sk(const struct sock *sk)
 {
 	return NULL;