Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android

[firefly-linux-kernel-4.4.55.git] / net / ipv6 / tcp_ipv6.c

diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 1a1cd3938fd0c35bda37f2995d442616fbd8d30b..50e71e784e850dc787d38f4454a596c1d2546c90 100644 (file)
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -234,6 +234,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
        fl6.flowi6_mark = sk->sk_mark;
        fl6.fl6_dport = usin->sin6_port;
        fl6.fl6_sport = inet->inet_sport;
+       fl6.flowi6_uid = sock_i_uid(sk);
 
        opt = rcu_dereference_protected(np->opt, sock_owned_by_user(sk));
        final_p = fl6_update_dst(&fl6, opt, &final);
@@ -932,9 +933,15 @@ static void tcp_v6_reqsk_send_ack(const struct sock *sk, struct sk_buff *skb,
        /* sk->sk_state == TCP_LISTEN -> for regular TCP_SYN_RECV
         * sk->sk_state == TCP_SYN_RECV -> for Fast Open.
         */
+       /* RFC 7323 2.3
+        * The window field (SEG.WND) of every outgoing segment, with the
+        * exception of <SYN> segments, MUST be right-shifted by
+        * Rcv.Wind.Shift bits:
+        */
        tcp_v6_send_ack(sk, skb, (sk->sk_state == TCP_LISTEN) ?
                        tcp_rsk(req)->snt_isn + 1 : tcp_sk(sk)->snd_nxt,
-                       tcp_rsk(req)->rcv_nxt, req->rsk_rcv_wnd,
+                       tcp_rsk(req)->rcv_nxt,
+                       req->rsk_rcv_wnd >> inet_rsk(req)->rcv_wscale,
                        tcp_time_stamp, req->ts_recent, sk->sk_bound_dev_if,
                        tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr),
                        0, 0);
@@ -1173,6 +1180,16 @@ out:
        return NULL;
 }
 
+static void tcp_v6_restore_cb(struct sk_buff *skb)
+{
+       /* We need to move header back to the beginning if xfrm6_policy_check()
+        * and tcp_v6_fill_cb() are going to be called again.
+        * ip6_datagram_recv_specific_ctl() also expects IP6CB to be there.
+        */
+       memmove(IP6CB(skb), &TCP_SKB_CB(skb)->header.h6,
+               sizeof(struct inet6_skb_parm));
+}
+
 /* The socket must have it's spinlock held when we get
  * here, unless it is a TCP_LISTEN socket.
  *
@@ -1198,7 +1215,7 @@ static int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
        if (skb->protocol == htons(ETH_P_IP))
                return tcp_v4_do_rcv(sk, skb);
 
-       if (sk_filter(sk, skb))
+       if (tcp_filter(sk, skb))
                goto discard;
 
        /*
@@ -1302,6 +1319,7 @@ ipv6_pktoptions:
                        np->flow_label = ip6_flowlabel(ipv6_hdr(opt_skb));
                if (ipv6_opt_accepted(sk, opt_skb, &TCP_SKB_CB(opt_skb)->header.h6)) {
                        skb_set_owner_r(opt_skb, sk);
+                       tcp_v6_restore_cb(opt_skb);
                        opt_skb = xchg(&np->pktoptions, opt_skb);
                } else {
                        __kfree_skb(opt_skb);
@@ -1335,15 +1353,6 @@ static void tcp_v6_fill_cb(struct sk_buff *skb, const struct ipv6hdr *hdr,
        TCP_SKB_CB(skb)->sacked = 0;
 }
 
-static void tcp_v6_restore_cb(struct sk_buff *skb)
-{
-       /* We need to move header back to the beginning if xfrm6_policy_check()
-        * and tcp_v6_fill_cb() are going to be called again.
-        */
-       memmove(IP6CB(skb), &TCP_SKB_CB(skb)->header.h6,
-               sizeof(struct inet6_skb_parm));
-}
-
 static int tcp_v6_rcv(struct sk_buff *skb)
 {
        const struct tcphdr *th;
@@ -1430,8 +1439,10 @@ process:
        if (tcp_v6_inbound_md5_hash(sk, skb))
                goto discard_and_relse;
 
-       if (sk_filter(sk, skb))
+       if (tcp_filter(sk, skb))
                goto discard_and_relse;
+       th = (const struct tcphdr *)skb->data;
+       hdr = ipv6_hdr(skb);
 
        skb->dev = NULL;
 
@@ -1894,6 +1905,7 @@ struct proto tcpv6_prot = {
        .proto_cgroup           = tcp_proto_cgroup,
 #endif
        .clear_sk               = tcp_v6_clear_sk,
+       .diag_destroy           = tcp_abort,
 };
 
 static const struct inet6_protocol tcpv6_protocol = {