| From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 |
| From: "Jason A. Donenfeld" <Jason@zx2c4.com> |
| Date: Fri, 14 Feb 2020 23:57:21 +0100 |
| Subject: [PATCH] wireguard: receive: reset last_under_load to zero |
| |
| commit 2a8a4df36462aa85b0db87b7c5ea145ba67e34a8 upstream. |
| |
| 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 <Jason@zx2c4.com> |
| Suggested-by: Matt Dunwoodie <ncon@noconroy.net> |
| Signed-off-by: David S. Miller <davem@davemloft.net> |
| Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> |
| --- |
| drivers/net/wireguard/receive.c | 7 +++++-- |
| 1 file changed, 5 insertions(+), 2 deletions(-) |
| |
| --- a/drivers/net/wireguard/receive.c |
| +++ b/drivers/net/wireguard/receive.c |
| @@ -118,10 +118,13 @@ static void wg_receive_handshake_packet( |
| |
| 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) || |