Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

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

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index bc790ea..c9ab964 100644 (file)
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -2698,16 +2698,21 @@ static void tcp_process_loss(struct sock *sk, int flag, bool is_dupack)
        struct tcp_sock *tp = tcp_sk(sk);
        bool recovered = !before(tp->snd_una, tp->high_seq);
 
+       if ((flag & FLAG_SND_UNA_ADVANCED) &&
+           tcp_try_undo_loss(sk, false))
+               return;
+
        if (tp->frto) { /* F-RTO RFC5682 sec 3.1 (sack enhanced version). */
                /* Step 3.b. A timeout is spurious if not all data are
                 * lost, i.e., never-retransmitted data are (s)acked.
                 */
-               if (tcp_try_undo_loss(sk, flag & FLAG_ORIG_SACK_ACKED))
+               if ((flag & FLAG_ORIG_SACK_ACKED) &&
+                   tcp_try_undo_loss(sk, true))
                        return;
 
-               if (after(tp->snd_nxt, tp->high_seq) &&
-                   (flag & FLAG_DATA_SACKED || is_dupack)) {
-                       tp->frto = 0; /* Loss was real: 2nd part of step 3.a */
+               if (after(tp->snd_nxt, tp->high_seq)) {
+                       if (flag & FLAG_DATA_SACKED || is_dupack)
+                               tp->frto = 0; /* Step 3.a. loss was real */
                } else if (flag & FLAG_SND_UNA_ADVANCED && !recovered) {
                        tp->high_seq = tp->snd_nxt;
                        __tcp_push_pending_frames(sk, tcp_current_mss(sk),
@@ -2732,8 +2737,6 @@ static void tcp_process_loss(struct sock *sk, int flag, bool is_dupack)
                else if (flag & FLAG_SND_UNA_ADVANCED)
                        tcp_reset_reno_sack(tp);
        }
-       if (tcp_try_undo_loss(sk, false))
-               return;
        tcp_xmit_retransmit_queue(sk);
 }
 
@@ -3283,7 +3286,9 @@ static void tcp_snd_una_update(struct tcp_sock *tp, u32 ack)
 {
        u32 delta = ack - tp->snd_una;
 
+       u64_stats_update_begin(&tp->syncp);
        tp->bytes_acked += delta;
+       u64_stats_update_end(&tp->syncp);
        tp->snd_una = ack;
 }
 
@@ -3292,7 +3297,9 @@ static void tcp_rcv_nxt_update(struct tcp_sock *tp, u32 seq)
 {
        u32 delta = seq - tp->rcv_nxt;
 
+       u64_stats_update_begin(&tp->syncp);
        tp->bytes_received += delta;
+       u64_stats_update_end(&tp->syncp);
        tp->rcv_nxt = seq;
 }