Merge branch 'for_3.8-rc1' into v4l_for_linus

[deliverable/linux.git] / net / ipv4 / tcp_input.c

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 1db6639835877bfef79df2d88034bb0e1fdfa082..181fc8234a529d5b6663f683e0da19e5ab17c1e8 100644 (file)
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -4529,6 +4529,9 @@ int tcp_send_rcvq(struct sock *sk, struct msghdr *msg, size_t size)
        struct tcphdr *th;
        bool fragstolen;
 
+       if (size == 0)
+               return 0;
+
        skb = alloc_skb(size + sizeof(*th), sk->sk_allocation);
        if (!skb)
                goto err;
@@ -5310,11 +5313,6 @@ static bool tcp_validate_incoming(struct sock *sk, struct sk_buff *skb,
                goto discard;
        }
 
-       /* ts_recent update must be made after we are sure that the packet
-        * is in window.
-        */
-       tcp_replace_ts_recent(tp, TCP_SKB_CB(skb)->seq);
-
        /* step 3: check security and precedence [ignored] */
 
        /* step 4: Check for a SYN
@@ -5549,6 +5547,11 @@ step5:
        if (th->ack && tcp_ack(sk, skb, FLAG_SLOWPATH) < 0)
                goto discard;
 
+       /* ts_recent update must be made after we are sure that the packet
+        * is in window.
+        */
+       tcp_replace_ts_recent(tp, TCP_SKB_CB(skb)->seq);
+
        tcp_rcv_rtt_measure_ts(sk, skb);
 
        /* Process urgent data. */
@@ -5642,7 +5645,11 @@ static bool tcp_rcv_fastopen_synack(struct sock *sk, struct sk_buff *synack,
        tcp_fastopen_cache_set(sk, mss, cookie, syn_drop);
 
        if (data) { /* Retransmit unacked data in SYN */
-               tcp_retransmit_skb(sk, data);
+               tcp_for_write_queue_from(data, sk) {
+                       if (data == tcp_send_head(sk) ||
+                           __tcp_retransmit_skb(sk, data))
+                               break;
+               }
                tcp_rearm_rto(sk);
                return true;
        }
@@ -6127,6 +6134,11 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
        } else
                goto discard;
 
+       /* ts_recent update must be made after we are sure that the packet
+        * is in window.
+        */
+       tcp_replace_ts_recent(tp, TCP_SKB_CB(skb)->seq);
+
        /* step 6: check the URG bit */
        tcp_urg(sk, skb, th);