From: Stefano Brivio <sbrivio@redhat.com>
Date: Thu, 26 Apr 2018 17:41:02 +0000 (+0200)
Subject: selftests: pmtu: Minimum MTU for vti6 is 68
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=5a643c861d0f20b1b1bf8c694a24759d9219f1e1;p=openwrt%2Fstaging%2Fblogic.git

selftests: pmtu: Minimum MTU for vti6 is 68

A vti6 interface can carry IPv4 packets too.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/tools/testing/selftests/net/pmtu.sh b/tools/testing/selftests/net/pmtu.sh
index 1e428781a625..7651fd4d86fe 100755
--- a/tools/testing/selftests/net/pmtu.sh
+++ b/tools/testing/selftests/net/pmtu.sh
@@ -368,7 +368,7 @@ test_pmtu_vti6_link_add_mtu() {
 
 	fail=0
 
-	min=1280
+	min=68			# vti6 can carry IPv4 packets too
 	max=$((65535 - 40))
 	# Check invalid values first
 	for v in $((min - 1)) $((max + 1)); do
@@ -384,7 +384,7 @@ test_pmtu_vti6_link_add_mtu() {
 	done
 
 	# Now check valid values
-	for v in 1280 1300 $((65535 - 40)); do
+	for v in 68 1280 1300 $((65535 - 40)); do
 		${ns_a} ip link add vti6_a mtu ${v} type vti6 local ${veth6_a_addr} remote ${veth6_b_addr} key 10
 		mtu="$(link_get_mtu "${ns_a}" vti6_a)"
 		${ns_a} ip link del vti6_a