1 files changed, 20 insertions, 35 deletions

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 75b68116682a..6094db5e11be 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -428,11 +428,11 @@ static void tcp_set_skb_tso_segs(struct sock *sk, struct sk_buff *skb, unsigned
  * packet to the list.  This won't be called frequently, I hope. 
  * Remember, these are still headerless SKBs at this point.
  */
-static int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss_now)
+int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss_now)
 {
         struct tcp_sock *tp = tcp_sk(sk);
         struct sk_buff *buff;
-        int nsize;
+        int nsize, old_factor;
         u16 flags;
 
         nsize = skb_headlen(skb) - len;
@@ -490,18 +490,29 @@ static int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned
                 tp->left_out -= tcp_skb_pcount(skb);
         }
 
+        old_factor = tcp_skb_pcount(skb);
+
         /* Fix up tso_factor for both original and new SKB.  */
         tcp_set_skb_tso_segs(sk, skb, mss_now);
         tcp_set_skb_tso_segs(sk, buff, mss_now);
 
-        if (TCP_SKB_CB(skb)->sacked & TCPCB_LOST) {
-                tp->lost_out += tcp_skb_pcount(skb);
-                tp->left_out += tcp_skb_pcount(skb);
-        }
+        /* If this packet has been sent out already, we must
+         * adjust the various packet counters.
+         */
+        if (after(tp->snd_nxt, TCP_SKB_CB(buff)->end_seq)) {
+                int diff = old_factor - tcp_skb_pcount(skb) -
+                        tcp_skb_pcount(buff);
 
-        if (TCP_SKB_CB(buff)->sacked&TCPCB_LOST) {
-                tp->lost_out += tcp_skb_pcount(buff);
-                tp->left_out += tcp_skb_pcount(buff);
+                tp->packets_out -= diff;
+                if (TCP_SKB_CB(skb)->sacked & TCPCB_LOST) {
+                        tp->lost_out -= diff;
+                        tp->left_out -= diff;
+                }
+                if (diff > 0) {
+                        tp->fackets_out -= diff;
+                        if ((int)tp->fackets_out < 0)
+                                tp->fackets_out = 0;
+                }
         }
 
         /* Link BUFF into the send queue. */
@@ -1350,12 +1361,6 @@ int tcp_retransmit_skb(struct sock *sk, struct sk_buff *skb)
         if (before(TCP_SKB_CB(skb)->seq, tp->snd_una)) {
                 if (before(TCP_SKB_CB(skb)->end_seq, tp->snd_una))
                         BUG();
-
-                if (sk->sk_route_caps & NETIF_F_TSO) {
-                        sk->sk_route_caps &= ~NETIF_F_TSO;
-                        sock_set_flag(sk, SOCK_NO_LARGESEND);
-                }
-
                 if (tcp_trim_head(sk, skb, tp->snd_una - TCP_SKB_CB(skb)->seq))
                         return -ENOMEM;
         }
@@ -1370,22 +1375,8 @@ int tcp_retransmit_skb(struct sock *sk, struct sk_buff *skb)
                 return -EAGAIN;
 
         if (skb->len > cur_mss) {
-                int old_factor = tcp_skb_pcount(skb);
-                int diff;
-
                 if (tcp_fragment(sk, skb, cur_mss, cur_mss))
                         return -ENOMEM; /* We'll try again later. */
-
-                /* New SKB created, account for it. */
-                diff = old_factor - tcp_skb_pcount(skb) -
-                       tcp_skb_pcount(skb->next);
-                tp->packets_out -= diff;
-
-                if (diff > 0) {
-                        tp->fackets_out -= diff;
-                        if ((int)tp->fackets_out < 0)
-                                tp->fackets_out = 0;
-                }
         }
 
         /* Collapse two adjacent packets if worthwhile and we can. */
@@ -1993,12 +1984,6 @@ int tcp_write_wakeup(struct sock *sk)
                                 TCP_SKB_CB(skb)->flags |= TCPCB_FLAG_PSH;
                                 if (tcp_fragment(sk, skb, seg_size, mss))
                                         return -1;
-                                /* SWS override triggered forced fragmentation.
-                                 * Disable TSO, the connection is too sick. */
-                                if (sk->sk_route_caps & NETIF_F_TSO) {
-                                        sock_set_flag(sk, SOCK_NO_LARGESEND);
-                                        sk->sk_route_caps &= ~NETIF_F_TSO;
-                                }
                         } else if (!tcp_skb_pcount(skb))
                                 tcp_set_skb_tso_segs(sk, skb, mss);