path: root/net/ipv4/tcp_output.c
diff options
authorDavid S. Miller <>2005-07-05 15:19:38 -0700
committerDavid S. Miller <>2005-07-05 15:19:38 -0700
commit55c97f3e990c1ff63957c64f6cb10711a09fd70e (patch)
tree003c5ca17005c8b22cc4cbe0b10721fc4ea676fd /net/ipv4/tcp_output.c
parenta2e2a59c93cc8ba39caa9011c2573f429e40ccd9 (diff)
[TCP]: Fix __tcp_push_pending_frames() 'nonagle' handling.
'nonagle' should be passed to the tcp_snd_test() function as 'TCP_NAGLE_PUSH' if we are checking an SKB not at the tail of the write_queue. This is because Nagle does not apply to such frames since we cannot possibly tack more data onto them. However, while doing this __tcp_push_pending_frames() makes all of the packets in the write_queue use this modified 'nonagle' value. Fix the bug and simplify this function by just calling tcp_write_xmit() directly if sk_send_head is non-NULL. As a result, we can now make tcp_data_snd_check() just call tcp_push_pending_frames() instead of the specialized __tcp_data_snd_check(). Signed-off-by: David S. Miller <>
Diffstat (limited to 'net/ipv4/tcp_output.c')
1 files changed, 1 insertions, 14 deletions
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index e292e11c7319..ce1d7cfbecfc 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -894,24 +894,11 @@ void __tcp_push_pending_frames(struct sock *sk, struct tcp_sock *tp,
struct sk_buff *skb = sk->sk_send_head;
if (skb) {
- if (!tcp_skb_is_last(sk, skb))
- nonagle = TCP_NAGLE_PUSH;
- if (!tcp_snd_test(sk, skb, cur_mss, nonagle) ||
- tcp_write_xmit(sk, cur_mss, nonagle))
+ if (tcp_write_xmit(sk, cur_mss, nonagle))
tcp_check_probe_timer(sk, tp);
-void __tcp_data_snd_check(struct sock *sk, struct sk_buff *skb)
- struct tcp_sock *tp = tcp_sk(sk);
- if (after(TCP_SKB_CB(skb)->end_seq, tp->snd_una + tp->snd_wnd) ||
- tcp_packets_in_flight(tp) >= tp->snd_cwnd ||
- tcp_write_xmit(sk, tcp_current_mss(sk, 1), tp->nonagle))
- tcp_check_probe_timer(sk, tp);
/* This function returns the amount that we can raise the
* usable window based on the following constraints