[IPV6]: Generalise the tcp_v6_lookup routines

In the same way as was done with the v4 counterparts, this will be moved
to inet6_hashtables.c.
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/ipv6.h

@@ -193,6 +193,11 @@ struct inet6_skb_parm {
 
 #define IP6CB(skb)	((struct inet6_skb_parm*)((skb)->cb))
 
+static inline int inet6_iif(const struct sk_buff *skb)
+{
+	return IP6CB(skb)->iif;
+}
+
 struct tcp6_request_sock {
 	struct tcp_request_sock	req;
 	struct in6_addr		loc_addr;

include/net/inet6_hashtables.h

+/*
+ * INET		An implementation of the TCP/IP protocol suite for the LINUX
+ *		operating system.  INET is implemented using the BSD Socket
+ *		interface as the means of communication with the user level.
+ *
+ * Authors:	Lotsa people, from code originally in tcp
+ *
+ *	This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _INET6_HASHTABLES_H
+#define _INET6_HASHTABLES_H
+
+#include <linux/types.h>
+
+struct in6_addr;
+struct inet_hashinfo;
+
+extern struct sock *inet6_lookup(struct inet_hashinfo *hashinfo,
+				 const struct in6_addr *saddr, const u16 sport,
+				 const struct in6_addr *daddr, const u16 dport,
+				 const int dif);
+#endif /* _INET6_HASHTABLES_H */

net/ipv4/Kconfig

@@ -425,9 +425,6 @@ config IP_TCPDIAG
 	  
 	  If unsure, say Y.
 
-config IP_TCPDIAG_IPV6
-	def_bool (IP_TCPDIAG=y && IPV6=y) || (IP_TCPDIAG=m && IPV6)
-
 config IP_TCPDIAG_DCCP
 	def_bool (IP_TCPDIAG=y && IP_DCCP=y) || (IP_TCPDIAG=m && IP_DCCP)
 

net/ipv4/tcp_diag.c

@@ -24,6 +24,10 @@
 #include <net/tcp.h>
 #include <net/ipv6.h>
 #include <net/inet_common.h>
+#include <net/inet_connection_sock.h>
+#include <net/inet_hashtables.h>
+#include <net/inet_timewait_sock.h>
+#include <net/inet6_hashtables.h>
 
 #include <linux/inet.h>
 #include <linux/stddef.h>
@@ -102,7 +106,7 @@ static int tcpdiag_fill(struct sk_buff *skb, struct sock *sk,
 		r->tcpdiag_wqueue = 0;
 		r->tcpdiag_uid = 0;
 		r->tcpdiag_inode = 0;
-#ifdef CONFIG_IP_TCPDIAG_IPV6
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
 		if (r->tcpdiag_family == AF_INET6) {
 			const struct tcp6_timewait_sock *tcp6tw = tcp6_twsk(sk);
 
@@ -121,7 +125,7 @@ static int tcpdiag_fill(struct sk_buff *skb, struct sock *sk,
 	r->id.tcpdiag_src[0] = inet->rcv_saddr;
 	r->id.tcpdiag_dst[0] = inet->daddr;
 
-#ifdef CONFIG_IP_TCPDIAG_IPV6
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
 	if (r->tcpdiag_family == AF_INET6) {
 		struct ipv6_pinfo *np = inet6_sk(sk);
 
@@ -196,19 +200,6 @@ static int tcpdiag_fill(struct sk_buff *skb, struct sock *sk,
 	return -1;
 }
 
-#ifdef CONFIG_IP_TCPDIAG_IPV6
-extern struct sock *tcp_v6_lookup(struct in6_addr *saddr, u16 sport,
-				  struct in6_addr *daddr, u16 dport,
-				  int dif);
-#else
-static inline struct sock *tcp_v6_lookup(struct in6_addr *saddr, u16 sport,
-					 struct in6_addr *daddr, u16 dport,
-					 int dif)
-{
-	return NULL;
-}
-#endif
-
 static int tcpdiag_get_exact(struct sk_buff *in_skb, const struct nlmsghdr *nlh)
 {
 	int err;
@@ -225,11 +216,14 @@ static int tcpdiag_get_exact(struct sk_buff *in_skb, const struct nlmsghdr *nlh)
 				 req->id.tcpdiag_dport, req->id.tcpdiag_src[0],
 				 req->id.tcpdiag_sport, req->id.tcpdiag_if);
 	}
-#ifdef CONFIG_IP_TCPDIAG_IPV6
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
 	else if (req->tcpdiag_family == AF_INET6) {
-		sk = tcp_v6_lookup((struct in6_addr*)req->id.tcpdiag_dst, req->id.tcpdiag_dport,
-				   (struct in6_addr*)req->id.tcpdiag_src, req->id.tcpdiag_sport,
-				   req->id.tcpdiag_if);
+		sk = inet6_lookup(hashinfo,
+				  (struct in6_addr*)req->id.tcpdiag_dst,
+				  req->id.tcpdiag_dport,
+				  (struct in6_addr*)req->id.tcpdiag_src,
+				  req->id.tcpdiag_sport,
+				  req->id.tcpdiag_if);
 	}
 #endif
 	else {
@@ -440,7 +434,7 @@ static int tcpdiag_dump_sock(struct sk_buff *skb, struct sock *sk,
 		struct inet_sock *inet = inet_sk(sk);
 
 		entry.family = sk->sk_family;
-#ifdef CONFIG_IP_TCPDIAG_IPV6
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
 		if (entry.family == AF_INET6) {
 			struct ipv6_pinfo *np = inet6_sk(sk);
 
@@ -502,7 +496,7 @@ static int tcpdiag_fill_req(struct sk_buff *skb, struct sock *sk,
 	r->tcpdiag_wqueue = 0;
 	r->tcpdiag_uid = sock_i_uid(sk);
 	r->tcpdiag_inode = 0;
-#ifdef CONFIG_IP_TCPDIAG_IPV6
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
 	if (r->tcpdiag_family == AF_INET6) {
 		ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_src,
 			       &tcp6_rsk(req)->loc_addr);
@@ -567,13 +561,13 @@ static int tcpdiag_dump_reqs(struct sk_buff *skb, struct sock *sk,
 
 			if (bc) {
 				entry.saddr =
-#ifdef CONFIG_IP_TCPDIAG_IPV6
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
 					(entry.family == AF_INET6) ?
 					tcp6_rsk(req)->loc_addr.s6_addr32 :
 #endif
 					&ireq->loc_addr;
 				entry.daddr = 
-#ifdef CONFIG_IP_TCPDIAG_IPV6
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
 					(entry.family == AF_INET6) ?
 					tcp6_rsk(req)->rmt_addr.s6_addr32 :
 #endif