selftests: pmtu: maximum MTU for vti4 is 2^16-1-20

Since commit 82612de ("ip_tunnel: restore binding to ifaces with a large mtu"), the maximum MTU for vti4 is based on IP_MAX_MTU instead of the mysterious constant 0xFFF8. This makes this selftest fail. Fixes: 82612de ("ip_tunnel: restore binding to ifaces with a large mtu") Signed-off-by: Sabrina Dubroca <[email protected]> Acked-by: Stefano Brivio <[email protected]> Acked-by: Nicolas Dichtel <[email protected]> Signed-off-by: David S. Miller <[email protected]>
akeromi · Sep 1, 2018 · 902b541 · 902b541
1 parent 63cc357
commit 902b541
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/tools/testing/selftests/net/pmtu.sh b/tools/testing/selftests/net/pmtu.sh
@@ -334,7 +334,7 @@ test_pmtu_vti4_link_add_mtu() {
 	fail=0
 
 	min=68
-	max=$((65528 - 20))
+	max=$((65535 - 20))
 	# Check invalid values first
 	for v in $((min - 1)) $((max + 1)); do
 		${ns_a} ip link add vti4_a mtu ${v} type vti local ${veth4_a_addr} remote ${veth4_b_addr} key 10 2>/dev/null