ipv4: Make output route lookup return rtable directly.

Instead of on the stack.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 29 insertions, 29 deletions

diff --git a/include/net/route.h b/include/net/route.h
index 707cfc8..088a186 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -118,9 +118,10 @@ extern void		ip_rt_redirect(__be32 old_gw, __be32 dst, __be32 new_gw,
 				       __be32 src, struct net_device *dev);
 extern void		rt_cache_flush(struct net *net, int how);
 extern void		rt_cache_flush_batch(struct net *net);
-extern int		__ip_route_output_key(struct net *, struct rtable **, const struct flowi *flp);
-extern int		ip_route_output_key(struct net *, struct rtable **, struct flowi *flp);
-extern int		ip_route_output_flow(struct net *, struct rtable **rp, struct flowi *flp, struct sock *sk);
+extern struct rtable *__ip_route_output_key(struct net *, const struct flowi *flp);
+extern struct rtable *ip_route_output_key(struct net *, struct flowi *flp);
+extern struct rtable *ip_route_output_flow(struct net *, struct flowi *flp,
+					   struct sock *sk);
 extern struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_orig);
 
 extern int ip_route_input_common(struct sk_buff *skb, __be32 dst, __be32 src,
@@ -166,10 +167,10 @@ static inline char rt_tos2priority(u8 tos)
 	return ip_tos2prio[IPTOS_TOS(tos)>>1];
 }
 
-static inline int ip_route_connect(struct rtable **rp, __be32 dst,
-				   __be32 src, u32 tos, int oif, u8 protocol,
-				   __be16 sport, __be16 dport, struct sock *sk,
-				   bool can_sleep)
+static inline struct rtable *ip_route_connect(__be32 dst, __be32 src, u32 tos,
+					      int oif, u8 protocol,
+					      __be16 sport, __be16 dport,
+					      struct sock *sk, bool can_sleep)
 {
 	struct flowi fl = { .oif = oif,
 			    .mark = sk->sk_mark,
@@ -179,8 +180,8 @@ static inline int ip_route_connect(struct rtable **rp, __be32 dst,
 			    .proto = protocol,
 			    .fl_ip_sport = sport,
 			    .fl_ip_dport = dport };
-	int err;
 	struct net *net = sock_net(sk);
+	struct rtable *rt;
 
 	if (inet_sk(sk)->transparent)
 		fl.flags |= FLOWI_FLAG_ANYSRC;
@@ -190,29 +191,29 @@ static inline int ip_route_connect(struct rtable **rp, __be32 dst,
 		fl.flags |= FLOWI_FLAG_CAN_SLEEP;
 
 	if (!dst || !src) {
-		err = __ip_route_output_key(net, rp, &fl);
-		if (err)
-			return err;
-		fl.fl4_dst = (*rp)->rt_dst;
-		fl.fl4_src = (*rp)->rt_src;
-		ip_rt_put(*rp);
-		*rp = NULL;
+		rt = __ip_route_output_key(net, &fl);
+		if (IS_ERR(rt))
+			return rt;
+		fl.fl4_dst = rt->rt_dst;
+		fl.fl4_src = rt->rt_src;
+		ip_rt_put(rt);
 	}
 	security_sk_classify_flow(sk, &fl);
-	return ip_route_output_flow(net, rp, &fl, sk);
+	return ip_route_output_flow(net, &fl, sk);
 }
 
-static inline int ip_route_newports(struct rtable **rp, u8 protocol,
-				    __be16 orig_sport, __be16 orig_dport,
-				    __be16 sport, __be16 dport, struct sock *sk)
+static inline struct rtable *ip_route_newports(struct rtable *rt,
+					       u8 protocol, __be16 orig_sport,
+					       __be16 orig_dport, __be16 sport,
+					       __be16 dport, struct sock *sk)
 {
 	if (sport != orig_sport || dport != orig_dport) {
-		struct flowi fl = { .oif = (*rp)->fl.oif,
-				    .mark = (*rp)->fl.mark,
-				    .fl4_dst = (*rp)->fl.fl4_dst,
-				    .fl4_src = (*rp)->fl.fl4_src,
-				    .fl4_tos = (*rp)->fl.fl4_tos,
-				    .proto = (*rp)->fl.proto,
+		struct flowi fl = { .oif = rt->fl.oif,
+				    .mark = rt->fl.mark,
+				    .fl4_dst = rt->fl.fl4_dst,
+				    .fl4_src = rt->fl.fl4_src,
+				    .fl4_tos = rt->fl.fl4_tos,
+				    .proto = rt->fl.proto,
 				    .fl_ip_sport = sport,
 				    .fl_ip_dport = dport };
 
@@ -220,12 +221,11 @@ static inline int ip_route_newports(struct rtable **rp, u8 protocol,
 			fl.flags |= FLOWI_FLAG_ANYSRC;
 		if (protocol == IPPROTO_TCP)
 			fl.flags |= FLOWI_FLAG_PRECOW_METRICS;
-		ip_rt_put(*rp);
-		*rp = NULL;
+		ip_rt_put(rt);
 		security_sk_classify_flow(sk, &fl);
-		return ip_route_output_flow(sock_net(sk), rp, &fl, sk);
+		return ip_route_output_flow(sock_net(sk), &fl, sk);
 	}
-	return 0;
+	return rt;
 }
 
 extern void rt_bind_peer(struct rtable *rt, int create);