tcp: shrink tcp6_timewait_sock by one cache line

[~andy/linux] / net / ipv6 / tcp_ipv6.c

diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 6e1649d58533fd9a1b0a3f9f4373348a625bfb60..dde8bad0448178429630e1b739b31a3da04f26a6 100644 (file)
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -963,7 +963,8 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
        if (!ipv6_unicast_destination(skb))
                goto drop;
 
-       if (inet_csk_reqsk_queue_is_full(sk) && !isn) {
+       if ((sysctl_tcp_syncookies == 2 ||
+            inet_csk_reqsk_queue_is_full(sk)) && !isn) {
                want_cookie = tcp_syn_flood_action(sk, skb, "TCPv6");
                if (!want_cookie)
                        goto drop;
@@ -1237,8 +1238,6 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
                newtp->advmss = tcp_sk(sk)->rx_opt.user_mss;
 
        tcp_initialize_rcv_mss(newsk);
-       tcp_synack_rtt_meas(newsk, req);
-       newtp->total_retrans = req->num_retrans;
 
        newinet->inet_daddr = newinet->inet_saddr = LOOPBACK4_IPV6;
        newinet->inet_rcv_saddr = LOOPBACK4_IPV6;
@@ -1361,8 +1360,7 @@ static int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
                        }
                }
 
-               if (tcp_rcv_established(sk, skb, tcp_hdr(skb), skb->len))
-                       goto reset;
+               tcp_rcv_established(sk, skb, tcp_hdr(skb), skb->len);
                if (opt_skb)
                        goto ipv6_pktoptions;
                return 0;
@@ -1427,7 +1425,7 @@ ipv6_pktoptions:
                if (np->rxopt.bits.rxhlim || np->rxopt.bits.rxohlim)
                        np->mcast_hops = ipv6_hdr(opt_skb)->hop_limit;
                if (np->rxopt.bits.rxtclass)
-                       np->rcv_tclass = ipv6_get_dsfield(ipv6_hdr(skb));
+                       np->rcv_tclass = ipv6_get_dsfield(ipv6_hdr(opt_skb));
                if (ipv6_opt_accepted(sk, opt_skb)) {
                        skb_set_owner_r(opt_skb, sk);
                        opt_skb = xchg(&np->pktoptions, opt_skb);
@@ -1732,7 +1730,7 @@ static void get_openreq6(struct seq_file *seq,
 
        seq_printf(seq,
                   "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
-                  "%02X %08X:%08X %02X:%08lX %08X %5d %8d %d %d %pK\n",
+                  "%02X %08X:%08X %02X:%08lX %08X %5u %8d %d %d %pK\n",
                   i,
                   src->s6_addr32[0], src->s6_addr32[1],
                   src->s6_addr32[2], src->s6_addr32[3],
@@ -1783,7 +1781,7 @@ static void get_tcp6_sock(struct seq_file *seq, struct sock *sp, int i)
 
        seq_printf(seq,
                   "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X "
-                  "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %pK %lu %lu %u %u %d\n",
+                  "%02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %lu %lu %u %u %d\n",
                   i,
                   src->s6_addr32[0], src->s6_addr32[1],
                   src->s6_addr32[2], src->s6_addr32[3], srcp,
@@ -1813,7 +1811,7 @@ static void get_timewait6_sock(struct seq_file *seq,
        const struct in6_addr *dest, *src;
        __u16 destp, srcp;
        const struct inet6_timewait_sock *tw6 = inet6_twsk((struct sock *)tw);
-       long delta = tw->tw_ttd - jiffies;
+       s32 delta = tw->tw_ttd - inet_tw_time_stamp();
 
        dest = &tw6->tw_v6_daddr;
        src  = &tw6->tw_v6_rcv_saddr;
@@ -1926,6 +1924,7 @@ struct proto tcpv6_prot = {
        .unhash                 = inet_unhash,
        .get_port               = inet_csk_get_port,
        .enter_memory_pressure  = tcp_enter_memory_pressure,
+       .stream_memory_free     = tcp_stream_memory_free,
        .sockets_allocated      = &tcp_sockets_allocated,
        .memory_allocated       = &tcp_memory_allocated,
        .memory_pressure        = &tcp_memory_pressure,