Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[karo-tx-linux.git] / net / ipv6 / tcp_ipv6.c

diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 2b7c3a100e2c327f3e3c057e309733e221b22061..7e41e2cbb85e39b78ea3c66c5b85273fc04fa036 100644 (file)
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -129,7 +129,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
        struct inet_connection_sock *icsk = inet_csk(sk);
        struct ipv6_pinfo *np = inet6_sk(sk);
        struct tcp_sock *tp = tcp_sk(sk);
-       struct in6_addr *saddr = NULL, *final_p = NULL, final;
+       struct in6_addr *saddr = NULL, *final_p, final;
        struct flowi fl;
        struct dst_entry *dst;
        int addr_type;
@@ -139,7 +139,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
                return -EINVAL;
 
        if (usin->sin6_family != AF_INET6)
-               return(-EAFNOSUPPORT);
+               return -EAFNOSUPPORT;
 
        memset(&fl, 0, sizeof(fl));
 
@@ -250,12 +250,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
        fl.fl_ip_dport = usin->sin6_port;
        fl.fl_ip_sport = inet->inet_sport;
 
-       if (np->opt && np->opt->srcrt) {
-               struct rt0_hdr *rt0 = (struct rt0_hdr *)np->opt->srcrt;
-               ipv6_addr_copy(&final, &fl.fl6_dst);
-               ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
-               final_p = &final;
-       }
+       final_p = fl6_update_dst(&fl, np->opt, &final);
 
        security_sk_classify_flow(sk, &fl);
 
@@ -477,7 +472,7 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req,
        struct ipv6_pinfo *np = inet6_sk(sk);
        struct sk_buff * skb;
        struct ipv6_txoptions *opt = NULL;
-       struct in6_addr * final_p = NULL, final;
+       struct in6_addr * final_p, final;
        struct flowi fl;
        struct dst_entry *dst;
        int err = -1;
@@ -494,12 +489,7 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req,
        security_req_classify_flow(req, &fl);
 
        opt = np->opt;
-       if (opt && opt->srcrt) {
-               struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
-               ipv6_addr_copy(&final, &fl.fl6_dst);
-               ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
-               final_p = &final;
-       }
+       final_p = fl6_update_dst(&fl, opt, &final);
 
        err = ip6_dst_lookup(sk, &dst, &fl);
        if (err)
@@ -1167,7 +1157,7 @@ static struct sock *tcp_v6_hnd_req(struct sock *sk,struct sk_buff *skb)
        }
 
 #ifdef CONFIG_SYN_COOKIES
-       if (!th->rst && !th->syn && th->ack)
+       if (!th->syn)
                sk = cookie_v6_check(sk, skb);
 #endif
        return sk;
@@ -1279,13 +1269,10 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
        treq = inet6_rsk(req);
        ipv6_addr_copy(&treq->rmt_addr, &ipv6_hdr(skb)->saddr);
        ipv6_addr_copy(&treq->loc_addr, &ipv6_hdr(skb)->daddr);
-       if (!want_cookie)
+       if (!want_cookie || tmp_opt.tstamp_ok)
                TCP_ECN_create_request(req, tcp_hdr(skb));
 
-       if (want_cookie) {
-               isn = cookie_v6_init_sequence(sk, skb, &req->mss);
-               req->cookie_ts = tmp_opt.tstamp_ok;
-       } else if (!isn) {
+       if (!isn) {
                if (ipv6_opt_accepted(sk, skb) ||
                    np->rxopt.bits.rxinfo || np->rxopt.bits.rxoinfo ||
                    np->rxopt.bits.rxhlim || np->rxopt.bits.rxohlim) {
@@ -1298,8 +1285,12 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
                if (!sk->sk_bound_dev_if &&
                    ipv6_addr_type(&treq->rmt_addr) & IPV6_ADDR_LINKLOCAL)
                        treq->iif = inet6_iif(skb);
-
-               isn = tcp_v6_init_sequence(skb);
+               if (!want_cookie) {
+                       isn = tcp_v6_init_sequence(skb);
+               } else {
+                       isn = cookie_v6_init_sequence(sk, skb, &req->mss);
+                       req->cookie_ts = tmp_opt.tstamp_ok;
+               }
        }
        tcp_rsk(req)->snt_isn = isn;
 
@@ -1392,18 +1383,13 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
                goto out_overflow;
 
        if (dst == NULL) {
-               struct in6_addr *final_p = NULL, final;
+               struct in6_addr *final_p, final;
                struct flowi fl;
 
                memset(&fl, 0, sizeof(fl));
                fl.proto = IPPROTO_TCP;
                ipv6_addr_copy(&fl.fl6_dst, &treq->rmt_addr);
-               if (opt && opt->srcrt) {
-                       struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
-                       ipv6_addr_copy(&final, &fl.fl6_dst);
-                       ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
-                       final_p = &final;
-               }
+               final_p = fl6_update_dst(&fl, opt, &final);
                ipv6_addr_copy(&fl.fl6_src, &treq->loc_addr);
                fl.oif = sk->sk_bound_dev_if;
                fl.mark = sk->sk_mark;
@@ -1423,7 +1409,7 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
 
        newsk = tcp_create_openreq_child(sk, req, skb);
        if (newsk == NULL)
-               goto out;
+               goto out_nonewsk;
 
        /*
         * No need to charge this sock to the relevant IPv6 refcnt debug socks
@@ -1511,18 +1497,22 @@ 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);
+               goto out;
+       }
        __inet6_hash(newsk, NULL);
-       __inet_inherit_port(sk, newsk);
 
        return newsk;
 
 out_overflow:
        NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENOVERFLOWS);
-out:
-       NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
+out_nonewsk:
        if (opt && opt != np->opt)
                sock_kfree_s(sk, opt, opt->tot_len);
        dst_release(dst);
+out:
+       NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
        return NULL;
 }
 
@@ -2156,6 +2146,8 @@ struct proto tcpv6_prot = {
        .setsockopt             = tcp_setsockopt,
        .getsockopt             = tcp_getsockopt,
        .recvmsg                = tcp_recvmsg,
+       .sendmsg                = tcp_sendmsg,
+       .sendpage               = tcp_sendpage,
        .backlog_rcv            = tcp_v6_do_rcv,
        .hash                   = tcp_v6_hash,
        .unhash                 = inet_unhash,
@@ -2174,6 +2166,7 @@ struct proto tcpv6_prot = {
        .twsk_prot              = &tcp6_timewait_sock_ops,
        .rsk_prot               = &tcp6_request_sock_ops,
        .h.hashinfo             = &tcp_hashinfo,
+       .no_autobind            = true,
 #ifdef CONFIG_COMPAT
        .compat_setsockopt      = compat_tcp_setsockopt,
        .compat_getsockopt      = compat_tcp_getsockopt,