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39 lines
1.4 KiB
Diff
39 lines
1.4 KiB
Diff
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: "Jason A. Donenfeld" <Jason@zx2c4.com>
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Date: Fri, 14 Feb 2020 23:57:21 +0100
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Subject: [PATCH] wireguard: receive: reset last_under_load to zero
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commit 2a8a4df36462aa85b0db87b7c5ea145ba67e34a8 upstream.
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This is a small optimization that prevents more expensive comparisons
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from happening when they are no longer necessary, by clearing the
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last_under_load variable whenever we wind up in a state where we were
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under load but we no longer are.
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Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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Suggested-by: Matt Dunwoodie <ncon@noconroy.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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---
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drivers/net/wireguard/receive.c | 7 +++++--
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1 file changed, 5 insertions(+), 2 deletions(-)
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--- a/drivers/net/wireguard/receive.c
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+++ b/drivers/net/wireguard/receive.c
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@@ -118,10 +118,13 @@ static void wg_receive_handshake_packet(
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under_load = skb_queue_len(&wg->incoming_handshakes) >=
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MAX_QUEUED_INCOMING_HANDSHAKES / 8;
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- if (under_load)
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+ if (under_load) {
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last_under_load = ktime_get_coarse_boottime_ns();
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- else if (last_under_load)
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+ } else if (last_under_load) {
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under_load = !wg_birthdate_has_expired(last_under_load, 1);
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+ if (!under_load)
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+ last_under_load = 0;
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+ }
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mac_state = wg_cookie_validate_packet(&wg->cookie_checker, skb,
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under_load);
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if ((under_load && mac_state == VALID_MAC_WITH_COOKIE) ||
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