diff options
Diffstat (limited to 'net/ipv4/tcp_output.c')
| -rw-r--r-- | net/ipv4/tcp_output.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index 19105b46a304..34f751776a01 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -2081,6 +2081,36 @@ static bool tcp_small_queue_check(struct sock *sk, const struct sk_buff *skb, return false; } +static void tcp_chrono_set(struct tcp_sock *tp, const enum tcp_chrono new) +{ + const u32 now = tcp_time_stamp; + + if (tp->chrono_type > TCP_CHRONO_UNSPEC) + tp->chrono_stat[tp->chrono_type - 1] += now - tp->chrono_start; + tp->chrono_start = now; + tp->chrono_type = new; +} + +void tcp_chrono_start(struct sock *sk, const enum tcp_chrono type) +{ + struct tcp_sock *tp = tcp_sk(sk); + + /* If there are multiple conditions worthy of tracking in a + * chronograph then the highest priority enum takes precedence over + * the other conditions. So that if something "more interesting" + * starts happening, stop the previous chrono and start a new one. + */ + if (type > tp->chrono_type) + tcp_chrono_set(tp, type); +} + +void tcp_chrono_stop(struct sock *sk, const enum tcp_chrono type) +{ + struct tcp_sock *tp = tcp_sk(sk); + + tcp_chrono_set(tp, TCP_CHRONO_UNSPEC); +} + /* This routine writes packets to the network. It advances the * send_head. This happens as incoming acks open up the remote * window for us. |