diff options
Diffstat (limited to 'target/linux/generic/backport-5.4/080-wireguard-0087-wireguard-receive-reset-last_under_load-to-zero.patch')
| -rw-r--r-- | target/linux/generic/backport-5.4/080-wireguard-0087-wireguard-receive-reset-last_under_load-to-zero.patch | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.4/080-wireguard-0087-wireguard-receive-reset-last_under_load-to-zero.patch b/target/linux/generic/backport-5.4/080-wireguard-0087-wireguard-receive-reset-last_under_load-to-zero.patch new file mode 100644 index 0000000000..193d28a83f --- /dev/null +++ b/target/linux/generic/backport-5.4/080-wireguard-0087-wireguard-receive-reset-last_under_load-to-zero.patch @@ -0,0 +1,38 @@ +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) || |