| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame] | 1 | From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 |
| 2 | From: "Jason A. Donenfeld" <Jason@zx2c4.com> |
| 3 | Date: Fri, 14 Feb 2020 23:57:21 +0100 |
| 4 | Subject: [PATCH] wireguard: receive: reset last_under_load to zero |
| 5 | |
| 6 | commit 2a8a4df36462aa85b0db87b7c5ea145ba67e34a8 upstream. |
| 7 | |
| 8 | This is a small optimization that prevents more expensive comparisons |
| 9 | from happening when they are no longer necessary, by clearing the |
| 10 | last_under_load variable whenever we wind up in a state where we were |
| 11 | under load but we no longer are. |
| 12 | |
| 13 | Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> |
| 14 | Suggested-by: Matt Dunwoodie <ncon@noconroy.net> |
| 15 | Signed-off-by: David S. Miller <davem@davemloft.net> |
| 16 | Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> |
| 17 | --- |
| 18 | drivers/net/wireguard/receive.c | 7 +++++-- |
| 19 | 1 file changed, 5 insertions(+), 2 deletions(-) |
| 20 | |
| 21 | --- a/drivers/net/wireguard/receive.c |
| 22 | +++ b/drivers/net/wireguard/receive.c |
| 23 | @@ -118,10 +118,13 @@ static void wg_receive_handshake_packet( |
| 24 | |
| 25 | under_load = skb_queue_len(&wg->incoming_handshakes) >= |
| 26 | MAX_QUEUED_INCOMING_HANDSHAKES / 8; |
| 27 | - if (under_load) |
| 28 | + if (under_load) { |
| 29 | last_under_load = ktime_get_coarse_boottime_ns(); |
| 30 | - else if (last_under_load) |
| 31 | + } else if (last_under_load) { |
| 32 | under_load = !wg_birthdate_has_expired(last_under_load, 1); |
| 33 | + if (!under_load) |
| 34 | + last_under_load = 0; |
| 35 | + } |
| 36 | mac_state = wg_cookie_validate_packet(&wg->cookie_checker, skb, |
| 37 | under_load); |
| 38 | if ((under_load && mac_state == VALID_MAC_WITH_COOKIE) || |