1 files changed, 21 insertions, 36 deletions

diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 1d0ab5570904..e59a31c48baf 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -255,18 +255,10 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
 
         security_sk_classify_flow(sk, &fl);
 
-        err = ip6_dst_lookup(sk, &dst, &fl);
-        if (err)
+        dst = ip6_dst_lookup_flow(sk, &fl, final_p, true);
+        if (IS_ERR(dst)) {
+                err = PTR_ERR(dst);
                 goto failure;
-        if (final_p)
-                ipv6_addr_copy(&fl.fl6_dst, final_p);
-
-        err = __xfrm_lookup(sock_net(sk), &dst, &fl, sk, XFRM_LOOKUP_WAIT);
-        if (err < 0) {
-                if (err == -EREMOTE)
-                        err = ip6_dst_blackhole(sk, &dst, &fl);
-                if (err < 0)
-                        goto failure;
         }
 
         if (saddr == NULL) {
@@ -385,7 +377,7 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
         np = inet6_sk(sk);
 
         if (type == ICMPV6_PKT_TOOBIG) {
-                struct dst_entry *dst = NULL;
+                struct dst_entry *dst;
 
                 if (sock_owned_by_user(sk))
                         goto out;
@@ -413,13 +405,9 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
                         fl.fl_ip_sport = inet->inet_sport;
                         security_skb_classify_flow(skb, &fl);
 
-                        if ((err = ip6_dst_lookup(sk, &dst, &fl))) {
-                                sk->sk_err_soft = -err;
-                                goto out;
-                        }
-
-                        if ((err = xfrm_lookup(net, &dst, &fl, sk, 0)) < 0) {
-                                sk->sk_err_soft = -err;
+                        dst = ip6_dst_lookup_flow(sk, &fl, NULL, false);
+                        if (IS_ERR(dst)) {
+                                sk->sk_err_soft = -PTR_ERR(dst);
                                 goto out;
                         }
 
@@ -496,7 +484,7 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req,
         struct in6_addr * final_p, final;
         struct flowi fl;
         struct dst_entry *dst;
-        int err = -1;
+        int err;
 
         memset(&fl, 0, sizeof(fl));
         fl.proto = IPPROTO_TCP;
@@ -512,15 +500,13 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req,
         opt = np->opt;
         final_p = fl6_update_dst(&fl, opt, &final);
 
-        err = ip6_dst_lookup(sk, &dst, &fl);
-        if (err)
+        dst = ip6_dst_lookup_flow(sk, &fl, final_p, false);
+        if (IS_ERR(dst)) {
+                err = PTR_ERR(dst);
                 goto done;
-        if (final_p)
-                ipv6_addr_copy(&fl.fl6_dst, final_p);
-        if ((err = xfrm_lookup(sock_net(sk), &dst, &fl, sk, 0)) < 0)
-                goto done;
-
+        }
         skb = tcp_make_synack(sk, dst, req, rvp);
+        err = -ENOMEM;
         if (skb) {
                 __tcp_v6_send_check(skb, &treq->loc_addr, &treq->rmt_addr);
 
@@ -1079,15 +1065,14 @@ static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
          * Underlying function will use this to retrieve the network
          * namespace
          */
-        if (!ip6_dst_lookup(ctl_sk, &dst, &fl)) {
-                if (xfrm_lookup(net, &dst, &fl, NULL, 0) >= 0) {
-                        skb_dst_set(buff, dst);
-                        ip6_xmit(ctl_sk, buff, &fl, NULL);
-                        TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS);
-                        if (rst)
-                                TCP_INC_STATS_BH(net, TCP_MIB_OUTRSTS);
-                        return;
-                }
+        dst = ip6_dst_lookup_flow(ctl_sk, &fl, NULL, false);
+        if (!IS_ERR(dst)) {
+                skb_dst_set(buff, dst);
+                ip6_xmit(ctl_sk, buff, &fl, NULL);
+                TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS);
+                if (rst)
+                        TCP_INC_STATS_BH(net, TCP_MIB_OUTRSTS);
+                return;
         }
 
         kfree_skb(buff);