rework Results.tex to include gVisor findings

Listings/tstun_gro.go

@@ -0,0 +1,22 @@
+// SetLinkFeaturesPostUp configures link features on t based on select TS_TUN_
+// environment variables and OS feature tests. Callers should ensure t is
+// up prior to calling, otherwise OS feature tests may be inconclusive.
+func (t *Wrapper) SetLinkFeaturesPostUp() {
+    if t.isTAP || runtime.GOOS == "android" {
+        return
+    }
+    if groDev, ok := t.tdev.(tun.GRODevice); ok {
+        if envknob.Bool("TS_TUN_DISABLE_UDP_GRO") {
+            groDev.DisableUDPGRO()
+        }
+        if envknob.Bool("TS_TUN_DISABLE_TCP_GRO") {
+            groDev.DisableTCPGRO()
+        }
+        err := probeTCPGRO(groDev)
+        if errors.Is(err, unix.EINVAL) {
+            groDev.DisableTCPGRO()
+            groDev.DisableUDPGRO()
+            t.logf("disabled TUN TCP & UDP GRO due to GRO probe error: %v", err)
+        }
+    }
+}