From bfde89418a6d1adb2f6ba487ccd9458583227264 Mon Sep 17 00:00:00 2001 From: "Jason A. Donenfeld" Date: Thu, 13 Feb 2020 14:44:06 +0100 Subject: receive: reset last_under_load to zero This is a small optimization that prevents more expensive comparisons from happening when they are no longer necessary, by clearing the last_under_load variable whenever we wind up in a state where we were under load but we no longer are. Signed-off-by: Jason A. Donenfeld Suggested-by: Matt Dunwoodie --- src/receive.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/src/receive.c b/src/receive.c index e00f0f4..a94fcd7 100644 --- a/src/receive.c +++ b/src/receive.c @@ -119,10 +119,13 @@ static void wg_receive_handshake_packet(struct wg_device *wg, under_load = skb_queue_len(&wg->incoming_handshakes) >= MAX_QUEUED_INCOMING_HANDSHAKES / 8; - if (under_load) + if (under_load) { last_under_load = ktime_get_coarse_boottime_ns(); - else if (last_under_load) + } else if (last_under_load) { under_load = !wg_birthdate_has_expired(last_under_load, 1); + if (!under_load) + last_under_load = 0; + } mac_state = wg_cookie_validate_packet(&wg->cookie_checker, skb, under_load); if ((under_load && mac_state == VALID_MAC_WITH_COOKIE) || -- cgit v1.2.3-59-g8ed1b