1 files changed, 22 insertions, 52 deletions

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index d978bb2f748b..856f68466d49 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1210,12 +1210,6 @@ static const struct tcp_request_sock_ops tcp_request_sock_ipv4_ops = {
 };
 #endif
 
-static struct timewait_sock_ops tcp_timewait_sock_ops = {
-        .twsk_obj_size  = sizeof(struct tcp_timewait_sock),
-        .twsk_unique    = tcp_twsk_unique,
-        .twsk_destructor= tcp_twsk_destructor,
-};
-
 int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
 {
         struct tcp_extend_values tmp_ext;
@@ -1347,7 +1341,7 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
                     tcp_death_row.sysctl_tw_recycle &&
                     (dst = inet_csk_route_req(sk, req)) != NULL &&
                     (peer = rt_get_peer((struct rtable *)dst)) != NULL &&
-                    peer->v4daddr == saddr) {
+                    peer->daddr.a4 == saddr) {
                         inet_peer_refcheck(peer);
                         if ((u32)get_seconds() - peer->tcp_ts_stamp < TCP_PAWS_MSL &&
                             (s32)(peer->tcp_ts - req->ts_recent) >
@@ -1442,7 +1436,7 @@ struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
 
         tcp_mtup_init(newsk);
         tcp_sync_mss(newsk, dst_mtu(dst));
-        newtp->advmss = dst_metric(dst, RTAX_ADVMSS);
+        newtp->advmss = dst_metric_advmss(dst);
         if (tcp_sk(sk)->rx_opt.user_mss &&
             tcp_sk(sk)->rx_opt.user_mss < newtp->advmss)
                 newtp->advmss = tcp_sk(sk)->rx_opt.user_mss;
@@ -1763,64 +1757,40 @@ do_time_wait:
         goto discard_it;
 }
 
-/* VJ's idea. Save last timestamp seen from this destination
- * and hold it at least for normal timewait interval to use for duplicate
- * segment detection in subsequent connections, before they enter synchronized
- * state.
- */
-
-int tcp_v4_remember_stamp(struct sock *sk)
+struct inet_peer *tcp_v4_get_peer(struct sock *sk, bool *release_it)
 {
+        struct rtable *rt = (struct rtable *) __sk_dst_get(sk);
         struct inet_sock *inet = inet_sk(sk);
-        struct tcp_sock *tp = tcp_sk(sk);
-        struct rtable *rt = (struct rtable *)__sk_dst_get(sk);
-        struct inet_peer *peer = NULL;
-        int release_it = 0;
+        struct inet_peer *peer;
 
         if (!rt || rt->rt_dst != inet->inet_daddr) {
-                peer = inet_getpeer(inet->inet_daddr, 1);
-                release_it = 1;
+                peer = inet_getpeer_v4(inet->inet_daddr, 1);
+                *release_it = true;
         } else {
                 if (!rt->peer)
                         rt_bind_peer(rt, 1);
                 peer = rt->peer;
+                *release_it = false;
         }
 
-        if (peer) {
-                if ((s32)(peer->tcp_ts - tp->rx_opt.ts_recent) <= 0 ||
-                    ((u32)get_seconds() - peer->tcp_ts_stamp > TCP_PAWS_MSL &&
-                     peer->tcp_ts_stamp <= (u32)tp->rx_opt.ts_recent_stamp)) {
-                        peer->tcp_ts_stamp = (u32)tp->rx_opt.ts_recent_stamp;
-                        peer->tcp_ts = tp->rx_opt.ts_recent;
-                }
-                if (release_it)
-                        inet_putpeer(peer);
-                return 1;
-        }
-
-        return 0;
+        return peer;
 }
-EXPORT_SYMBOL(tcp_v4_remember_stamp);
+EXPORT_SYMBOL(tcp_v4_get_peer);
 
-int tcp_v4_tw_remember_stamp(struct inet_timewait_sock *tw)
+void *tcp_v4_tw_get_peer(struct sock *sk)
 {
-        struct inet_peer *peer = inet_getpeer(tw->tw_daddr, 1);
-
-        if (peer) {
-                const struct tcp_timewait_sock *tcptw = tcp_twsk((struct sock *)tw);
-
-                if ((s32)(peer->tcp_ts - tcptw->tw_ts_recent) <= 0 ||
-                    ((u32)get_seconds() - peer->tcp_ts_stamp > TCP_PAWS_MSL &&
-                     peer->tcp_ts_stamp <= (u32)tcptw->tw_ts_recent_stamp)) {
-                        peer->tcp_ts_stamp = (u32)tcptw->tw_ts_recent_stamp;
-                        peer->tcp_ts       = tcptw->tw_ts_recent;
-                }
-                inet_putpeer(peer);
-                return 1;
-        }
+        struct inet_timewait_sock *tw = inet_twsk(sk);
 
-        return 0;
+        return inet_getpeer_v4(tw->tw_daddr, 1);
 }
+EXPORT_SYMBOL(tcp_v4_tw_get_peer);
+
+static struct timewait_sock_ops tcp_timewait_sock_ops = {
+        .twsk_obj_size  = sizeof(struct tcp_timewait_sock),
+        .twsk_unique    = tcp_twsk_unique,
+        .twsk_destructor= tcp_twsk_destructor,
+        .twsk_getpeer   = tcp_v4_tw_get_peer,
+};
 
 const struct inet_connection_sock_af_ops ipv4_specific = {
         .queue_xmit        = ip_queue_xmit,
@@ -1828,7 +1798,7 @@ const struct inet_connection_sock_af_ops ipv4_specific = {
         .rebuild_header    = inet_sk_rebuild_header,
         .conn_request      = tcp_v4_conn_request,
         .syn_recv_sock     = tcp_v4_syn_recv_sock,
-        .remember_stamp    = tcp_v4_remember_stamp,
+        .get_peer          = tcp_v4_get_peer,
         .net_header_len    = sizeof(struct iphdr),
         .setsockopt        = ip_setsockopt,
         .getsockopt        = ip_getsockopt,