From d3e56aa979b8175c51204b4739b6fcdeb5716459 Mon Sep 17 00:00:00 2001
From: Brad Fitzpatrick <bradfitz@tailscale.com>
Date: Mon, 8 Mar 2021 20:33:12 -0800
Subject: [PATCH] cmd/tailscaled: fix monitor debug tool's output

Logic was backwards, introduced in earlier monitor refactoring last
week in e3df29d488f5ce50e.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
---
 cmd/tailscaled/debug.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmd/tailscaled/debug.go b/cmd/tailscaled/debug.go
index c0d3134a8..3419dfb3b 100644
--- a/cmd/tailscaled/debug.go
+++ b/cmd/tailscaled/debug.go
@@ -69,7 +69,7 @@ func runMonitor(ctx context.Context) error {
 		return err
 	}
 	mon.RegisterChangeCallback(func(changed bool, st *interfaces.State) {
-		if changed {
+		if !changed {
 			log.Printf("Link monitor fired; no change")
 			return
 		}