[IPV6]: Make ndisc_flow_init() common for later use.

For later use, this patch is renaming ndisc_flow_init() to
icmpv6_flow_init() and putting it in common place.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

include/linux/icmpv6.h

@@ -182,6 +182,14 @@ extern int				icmpv6_err_convert(int type, int code,
 extern void				icmpv6_cleanup(void);
 extern void				icmpv6_param_prob(struct sk_buff *skb,
 							  int code, int pos);
+
+struct flowi;
+extern void				icmpv6_flow_init(struct sock *sk,
+							 struct flowi *fl,
+							 u8 type,
+							 const struct in6_addr *saddr,
+							 const struct in6_addr *daddr,
+							 int oif);
 #endif
 
 #endif

net/ipv6/icmp.c

@@ -777,6 +777,22 @@ static int icmpv6_rcv(struct sk_buff *skb)
 	return 0;
 }
 
+void icmpv6_flow_init(struct sock *sk, struct flowi *fl,
+		      u8 type,
+		      const struct in6_addr *saddr,
+		      const struct in6_addr *daddr,
+		      int oif)
+{
+	memset(fl, 0, sizeof(*fl));
+	ipv6_addr_copy(&fl->fl6_src, saddr);
+	ipv6_addr_copy(&fl->fl6_dst, daddr);
+	fl->proto	 	= IPPROTO_ICMPV6;
+	fl->fl_icmp_type	= type;
+	fl->fl_icmp_code	= 0;
+	fl->oif			= oif;
+	security_sk_classify_flow(sk, fl);
+}
+
 /*
  * Special lock-class for __icmpv6_sk:
  */

net/ipv6/ndisc.c

@@ -441,21 +441,6 @@ static void pndisc_destructor(struct pneigh_entry *n)
 /*
  *	Send a Neighbour Advertisement
  */
-
-static inline void ndisc_flow_init(struct flowi *fl, u8 type,
-			    struct in6_addr *saddr, struct in6_addr *daddr,
-			    int oif)
-{
-	memset(fl, 0, sizeof(*fl));
-	ipv6_addr_copy(&fl->fl6_src, saddr);
-	ipv6_addr_copy(&fl->fl6_dst, daddr);
-	fl->proto	 	= IPPROTO_ICMPV6;
-	fl->fl_icmp_type	= type;
-	fl->fl_icmp_code	= 0;
-	fl->oif			= oif;
-	security_sk_classify_flow(ndisc_socket->sk, fl);
-}
-
 static void __ndisc_send(struct net_device *dev,
 			 struct neighbour *neigh,
 			 struct in6_addr *daddr, struct in6_addr *saddr,
@@ -474,8 +459,8 @@ static void __ndisc_send(struct net_device *dev,
 
 	type = icmp6h->icmp6_type;
 
-	ndisc_flow_init(&fl, type, saddr, daddr,
-			dev->ifindex);
+	icmpv6_flow_init(ndisc_socket->sk, &fl, type,
+			 saddr, daddr, dev->ifindex);
 
 	dst = ndisc_dst_alloc(dev, neigh, daddr, ip6_output);
 	if (!dst)
@@ -1439,8 +1424,8 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
 		return;
 	}
 
-	ndisc_flow_init(&fl, NDISC_REDIRECT, &saddr_buf, &ipv6_hdr(skb)->saddr,
-			dev->ifindex);
+	icmpv6_flow_init(ndisc_socket->sk, &fl, NDISC_REDIRECT,
+			 &saddr_buf, &ipv6_hdr(skb)->saddr, dev->ifindex);
 
 	dst = ip6_route_output(NULL, &fl);
 	if (dst == NULL)