Signed-off-by: Ilpo Järvinen <[EMAIL PROTECTED]>
---
net/ipv4/tcp_output.c | 19 +++++++++++--------
1 files changed, 11 insertions(+), 8 deletions(-)
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index eb8c61a..c70f1d0 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -888,6 +888,15 @@ void tcp_mtup_init(struct sock *sk)
icsk->icsk_mtup.probe_size = 0;
}
+/* Bound MSS / TSO packet size with the half of the window */
+static int tcp_bound_to_half_wnd(struct tcp_sock *tp, int pktsize)
+{
+ if (tp->max_window && pktsize > (tp->max_window >> 1))
+ return max(tp->max_window >> 1, 68U - tp->tcp_header_len);
+ else
+ return pktsize;
+}
+
/* This function synchronize snd mss to current pmtu/exthdr set.
tp->rx_opt.user_mss is mss set by user by TCP_MAXSEG. It does NOT counts
@@ -920,10 +929,7 @@ unsigned int tcp_sync_mss(struct sock *sk, u32 pmtu)
icsk->icsk_mtup.search_high = pmtu;
mss_now = tcp_mtu_to_mss(sk, pmtu);
-
- /* Bound mss with half of window */
- if (tp->max_window && mss_now > (tp->max_window >> 1))
- mss_now = max((tp->max_window >> 1), 68U - tp->tcp_header_len);
+ mss_now = tcp_bound_to_half_wnd(tp, mss_now);
/* And store cached results */
icsk->icsk_pmtu_cookie = pmtu;
@@ -977,10 +983,7 @@ unsigned int tcp_current_mss(struct sock *sk, int
large_allowed)
inet_csk(sk)->icsk_ext_hdr_len -
tp->tcp_header_len);
- if (tp->max_window && (xmit_size_goal > (tp->max_window >> 1)))
- xmit_size_goal = max((tp->max_window >> 1),
- 68U - tp->tcp_header_len);
-
+ xmit_size_goal = tcp_bound_to_half_wnd(tp, xmit_size_goal);
xmit_size_goal -= (xmit_size_goal % mss_now);
}
tp->xmit_size_goal = xmit_size_goal;
--
1.5.0.6
--
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