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| author | Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> | 2007-12-31 14:57:40 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-28 15:00:26 -0800 |
| commit | 409d22b470532cb92b91b9aeb7257357a176b849 (patch) | |
| tree | df81227116c5d4ddf436c7d97d3d0980b16f621c /net/ipv4/tcp_output.c | |
| parent | 056834d9f6f6eaf4cc7268569e53acab957aac27 (diff) | |
| download | linux-409d22b470532cb92b91b9aeb7257357a176b849.tar.gz linux-409d22b470532cb92b91b9aeb7257357a176b849.tar.bz2 linux-409d22b470532cb92b91b9aeb7257357a176b849.zip | |
[TCP]: Code duplication removal, added tcp_bound_to_half_wnd()
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_output.c')
| -rw-r--r-- | 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 bb7e80a284e7..b3110fc1570e 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; |