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authorJiri Kosina <jkosina@suse.cz>2010-12-22 23:23:38 +0000
committerDavid S. Miller <davem@davemloft.net>2010-12-23 09:54:26 -0800
commitd9f4fbaf7053af43e6c72909c2aff18654717aed (patch)
tree017b591067952cab3684026a86c6c6eafb7b0dd0 /net/ipv4
parentf622691c91cd1bb27d03a5caa8a43822572c62bc (diff)
downloadlinux-d9f4fbaf7053af43e6c72909c2aff18654717aed.tar.bz2
tcp: cleanup of cwnd initialization in tcp_init_metrics()
Commit 86bcebafc5e7f5 ("tcp: fix >2 iw selection") fixed a case when congestion window initialization has been mistakenly omitted by introducing cwnd label and putting backwards goto from the end of the function. This makes the code unnecessarily tricky to read and understand on a first sight. Shuffle the code around a little bit to make it more obvious. Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/tcp_input.c29
1 files changed, 12 insertions, 17 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 824e8c8a17ad..2549b29b062d 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -916,25 +916,20 @@ static void tcp_init_metrics(struct sock *sk)
tp->mdev_max = tp->rttvar = max(tp->mdev, tcp_rto_min(sk));
}
tcp_set_rto(sk);
- if (inet_csk(sk)->icsk_rto < TCP_TIMEOUT_INIT && !tp->rx_opt.saw_tstamp)
- goto reset;
-
-cwnd:
- tp->snd_cwnd = tcp_init_cwnd(tp, dst);
- tp->snd_cwnd_stamp = tcp_time_stamp;
- return;
-
+ if (inet_csk(sk)->icsk_rto < TCP_TIMEOUT_INIT && !tp->rx_opt.saw_tstamp) {
reset:
- /* Play conservative. If timestamps are not
- * supported, TCP will fail to recalculate correct
- * rtt, if initial rto is too small. FORGET ALL AND RESET!
- */
- if (!tp->rx_opt.saw_tstamp && tp->srtt) {
- tp->srtt = 0;
- tp->mdev = tp->mdev_max = tp->rttvar = TCP_TIMEOUT_INIT;
- inet_csk(sk)->icsk_rto = TCP_TIMEOUT_INIT;
+ /* Play conservative. If timestamps are not
+ * supported, TCP will fail to recalculate correct
+ * rtt, if initial rto is too small. FORGET ALL AND RESET!
+ */
+ if (!tp->rx_opt.saw_tstamp && tp->srtt) {
+ tp->srtt = 0;
+ tp->mdev = tp->mdev_max = tp->rttvar = TCP_TIMEOUT_INIT;
+ inet_csk(sk)->icsk_rto = TCP_TIMEOUT_INIT;
+ }
}
- goto cwnd;
+ tp->snd_cwnd = tcp_init_cwnd(tp, dst);
+ tp->snd_cwnd_stamp = tcp_time_stamp;
}
static void tcp_update_reordering(struct sock *sk, const int metric,