1 files changed, 14 insertions, 113 deletions

diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 26175bffbaa0..93825dd3a7c0 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -77,9 +77,6 @@ static void	tcp_v6_reqsk_send_ack(struct sock *sk, struct sk_buff *skb,
                                       struct request_sock *req);
 
 static int      tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb);
-static void     __tcp_v6_send_check(struct sk_buff *skb,
-                                    const struct in6_addr *saddr,
-                                    const struct in6_addr *daddr);
 
 static const struct inet_connection_sock_af_ops ipv6_mapped;
 static const struct inet_connection_sock_af_ops ipv6_specific;
@@ -119,14 +116,6 @@ static void tcp_v6_hash(struct sock *sk)
         }
 }
 
-static __inline__ __sum16 tcp_v6_check(int len,
-                                   const struct in6_addr *saddr,
-                                   const struct in6_addr *daddr,
-                                   __wsum base)
-{
-        return csum_ipv6_magic(saddr, daddr, len, IPPROTO_TCP, base);
-}
-
 static __u32 tcp_v6_init_sequence(const struct sk_buff *skb)
 {
         return secure_tcpv6_sequence_number(ipv6_hdr(skb)->daddr.s6_addr32,
@@ -306,7 +295,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
         if (err)
                 goto late_failure;
 
-        if (!tp->write_seq)
+        if (!tp->write_seq && likely(!tp->repair))
                 tp->write_seq = secure_tcpv6_sequence_number(np->saddr.s6_addr32,
                                                              np->daddr.s6_addr32,
                                                              inet->inet_sport,
@@ -495,9 +484,12 @@ static int tcp_v6_rtx_synack(struct sock *sk, struct request_sock *req,
                              struct request_values *rvp)
 {
         struct flowi6 fl6;
+        int res;
 
-        TCP_INC_STATS_BH(sock_net(sk), TCP_MIB_RETRANSSEGS);
-        return tcp_v6_send_synack(sk, NULL, &fl6, req, rvp, 0);
+        res = tcp_v6_send_synack(sk, NULL, &fl6, req, rvp, 0);
+        if (!res)
+                TCP_INC_STATS_BH(sock_net(sk), TCP_MIB_RETRANSSEGS);
+        return res;
 }
 
 static void tcp_v6_reqsk_destructor(struct request_sock *req)
@@ -719,94 +711,6 @@ static const struct tcp_request_sock_ops tcp_request_sock_ipv6_ops = {
 };
 #endif
 
-static void __tcp_v6_send_check(struct sk_buff *skb,
-                                const struct in6_addr *saddr, const struct in6_addr *daddr)
-{
-        struct tcphdr *th = tcp_hdr(skb);
-
-        if (skb->ip_summed == CHECKSUM_PARTIAL) {
-                th->check = ~tcp_v6_check(skb->len, saddr, daddr, 0);
-                skb->csum_start = skb_transport_header(skb) - skb->head;
-                skb->csum_offset = offsetof(struct tcphdr, check);
-        } else {
-                th->check = tcp_v6_check(skb->len, saddr, daddr,
-                                         csum_partial(th, th->doff << 2,
-                                                      skb->csum));
-        }
-}
-
-static void tcp_v6_send_check(struct sock *sk, struct sk_buff *skb)
-{
-        struct ipv6_pinfo *np = inet6_sk(sk);
-
-        __tcp_v6_send_check(skb, &np->saddr, &np->daddr);
-}
-
-static int tcp_v6_gso_send_check(struct sk_buff *skb)
-{
-        const struct ipv6hdr *ipv6h;
-        struct tcphdr *th;
-
-        if (!pskb_may_pull(skb, sizeof(*th)))
-                return -EINVAL;
-
-        ipv6h = ipv6_hdr(skb);
-        th = tcp_hdr(skb);
-
-        th->check = 0;
-        skb->ip_summed = CHECKSUM_PARTIAL;
-        __tcp_v6_send_check(skb, &ipv6h->saddr, &ipv6h->daddr);
-        return 0;
-}
-
-static struct sk_buff **tcp6_gro_receive(struct sk_buff **head,
-                                         struct sk_buff *skb)
-{
-        const struct ipv6hdr *iph = skb_gro_network_header(skb);
-        __wsum wsum;
-        __sum16 sum;
-
-        switch (skb->ip_summed) {
-        case CHECKSUM_COMPLETE:
-                if (!tcp_v6_check(skb_gro_len(skb), &iph->saddr, &iph->daddr,
-                                  skb->csum)) {
-                        skb->ip_summed = CHECKSUM_UNNECESSARY;
-                        break;
-                }
-flush:
-                NAPI_GRO_CB(skb)->flush = 1;
-                return NULL;
-
-        case CHECKSUM_NONE:
-                wsum = ~csum_unfold(csum_ipv6_magic(&iph->saddr, &iph->daddr,
-                                                    skb_gro_len(skb),
-                                                    IPPROTO_TCP, 0));
-                sum = csum_fold(skb_checksum(skb,
-                                             skb_gro_offset(skb),
-                                             skb_gro_len(skb),
-                                             wsum));
-                if (sum)
-                        goto flush;
-
-                skb->ip_summed = CHECKSUM_UNNECESSARY;
-                break;
-        }
-
-        return tcp_gro_receive(head, skb);
-}
-
-static int tcp6_gro_complete(struct sk_buff *skb)
-{
-        const struct ipv6hdr *iph = ipv6_hdr(skb);
-        struct tcphdr *th = tcp_hdr(skb);
-
-        th->check = ~tcp_v6_check(skb->len - skb_transport_offset(skb),
-                                  &iph->saddr, &iph->daddr, 0);
-        skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
-
-        return tcp_gro_complete(skb);
-}
-
 static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
                                  u32 ts, struct tcp_md5sig_key *key, int rst, u8 tclass)
 {
@@ -1364,7 +1268,7 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
 
         tcp_initialize_rcv_mss(newsk);
         tcp_synack_rtt_meas(newsk, req);
-        newtp->total_retrans = req->retrans;
+        newtp->total_retrans = req->num_retrans;
 
         newinet->inet_daddr = newinet->inet_saddr = LOOPBACK4_IPV6;
         newinet->inet_rcv_saddr = LOOPBACK4_IPV6;
@@ -1384,7 +1288,8 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
 #endif
 
         if (__inet_inherit_port(sk, newsk) < 0) {
-                sock_put(newsk);
+                inet_csk_prepare_forced_close(newsk);
+                tcp_done(newsk);
                 goto out;
         }
         __inet6_hash(newsk, NULL);
@@ -1741,11 +1646,11 @@ static void tcp_v6_early_demux(struct sk_buff *skb)
                 skb->destructor = sock_edemux;
                 if (sk->sk_state != TCP_TIME_WAIT) {
                         struct dst_entry *dst = sk->sk_rx_dst;
-                        struct inet_sock *icsk = inet_sk(sk);
+
                         if (dst)
                                 dst = dst_check(dst, inet6_sk(sk)->rx_dst_cookie);
                         if (dst &&
-                            icsk->rx_dst_ifindex == skb->skb_iif)
+                            inet_sk(sk)->rx_dst_ifindex == skb->skb_iif)
                                 skb_dst_set_noref(skb, dst);
                 }
         }
@@ -1866,7 +1771,7 @@ static void get_openreq6(struct seq_file *seq,
                    0,0, /* could print option size, but that is af dependent. */
                    1,   /* timers active (only the expire timer) */
                    jiffies_to_clock_t(ttd),
-                   req->retrans,
+                   req->num_timeout,
                    from_kuid_munged(seq_user_ns(seq), uid),
                    0,  /* non standard timer */
                    0, /* open_requests have no inode */
@@ -2063,10 +1968,6 @@ static const struct inet6_protocol tcpv6_protocol = {
         .early_demux    =       tcp_v6_early_demux,
         .handler        =       tcp_v6_rcv,
         .err_handler    =       tcp_v6_err,
-        .gso_send_check =       tcp_v6_gso_send_check,
-        .gso_segment    =       tcp_tso_segment,
-        .gro_receive    =       tcp6_gro_receive,
-        .gro_complete   =       tcp6_gro_complete,
         .flags          =       INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
 };
 
@@ -2121,10 +2022,10 @@ int __init tcpv6_init(void)
 out:
         return ret;
 
-out_tcpv6_protocol:
-        inet6_del_protocol(&tcpv6_protocol, IPPROTO_TCP);
 out_tcpv6_protosw:
         inet6_unregister_protosw(&tcpv6_protosw);
+out_tcpv6_protocol:
+        inet6_del_protocol(&tcpv6_protocol, IPPROTO_TCP);
         goto out;
 }