ipn/{ipnlocal,ipnserver}: add some comments

Change-Id: Ieb5917edaf572342b755caa458693512c7aece81 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2022-11-25 06:02:40 -08:00
parent 732c3d2ed0
commit 5ea7c7d603
2 changed files with 13 additions and 0 deletions
@@ -100,6 +100,8 @@ type Server struct {
 	bsMu sync.Mutex // lock order: bsMu, then mu
 	bs   *ipn.BackendServer

+	// mu guards the fields that follow.
+	// lock order: mu, then LocalBackend.mu
 	mu            sync.Mutex
 	lastUserID    string                             // tracks last userid; on change, Reset state for paranoia
 	allClients    map[net.Conn]*ipnauth.ConnIdentity // HTTP or IPN