diff options
| author | Eric Dumazet <edumazet@google.com> | 2017-11-03 06:09:17 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-11-05 22:14:23 +0900 |
| commit | d0f36847016276920d860d5c089934ff3fea7e30 (patch) | |
| tree | bb970e4fdaa4fbc92de0c39ed6edd4db823dcdc8 /net | |
| parent | f21506cb42112b1c0b391dae7a700e69a42128e8 (diff) | |
| download | linux-d0f36847016276920d860d5c089934ff3fea7e30.tar.gz | |
tcp: tcp_mtu_probing() cleanup
Reduce one indentation level to make code more readable. tcp_sync_mss() can be factorized. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/tcp_timer.c | 31 |
1 files changed, 14 insertions, 17 deletions
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c index 035a1ef1f2d8..16df6dd44b98 100644 --- a/net/ipv4/tcp_timer.c +++ b/net/ipv4/tcp_timer.c @@ -107,26 +107,23 @@ static int tcp_orphan_retries(struct sock *sk, bool alive) static void tcp_mtu_probing(struct inet_connection_sock *icsk, struct sock *sk) { - struct net *net = sock_net(sk); + const struct net *net = sock_net(sk); + int mss; /* Black hole detection */ - if (net->ipv4.sysctl_tcp_mtu_probing) { - if (!icsk->icsk_mtup.enabled) { - icsk->icsk_mtup.enabled = 1; - icsk->icsk_mtup.probe_timestamp = tcp_jiffies32; - tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); - } else { - struct net *net = sock_net(sk); - struct tcp_sock *tp = tcp_sk(sk); - int mss; - - mss = tcp_mtu_to_mss(sk, icsk->icsk_mtup.search_low) >> 1; - mss = min(net->ipv4.sysctl_tcp_base_mss, mss); - mss = max(mss, 68 - tp->tcp_header_len); - icsk->icsk_mtup.search_low = tcp_mss_to_mtu(sk, mss); - tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); - } + if (!net->ipv4.sysctl_tcp_mtu_probing) + return; + + if (!icsk->icsk_mtup.enabled) { + icsk->icsk_mtup.enabled = 1; + icsk->icsk_mtup.probe_timestamp = tcp_jiffies32; + } else { + mss = tcp_mtu_to_mss(sk, icsk->icsk_mtup.search_low) >> 1; + mss = min(net->ipv4.sysctl_tcp_base_mss, mss); + mss = max(mss, 68 - tcp_sk(sk)->tcp_header_len); + icsk->icsk_mtup.search_low = tcp_mss_to_mtu(sk, mss); } + tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); } |