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selftests: pmtu: Add pmtu_vti6_default_mtu test 

Same as pmtu_vti4_default_mtu, but on IPv6 with vti6.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stefano Brivio 2018-03-17 02:31:43 +01:00 committed by David S. Miller
parent a41c789bdc
commit 35b49424b8
1 changed files with 17 additions and 1 deletions
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18
tools/testing/selftests/net/pmtu.sh
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@ -18,10 +18,14 @@
# endpoints. Check that MTU assigned to vti interface is the MTU of the
# lower layer (veth) minus additional lower layer headers (zero, for veth)
# minus IPv4 header length
#
# - pmtu_vti6_default_mtu
# Same as above, for IPv6
tests="
pmtu_vti6_exception vti6: PMTU exceptions
pmtu_vti4_default_mtu vti4: default MTU assignment"
pmtu_vti4_default_mtu vti4: default MTU assignment
pmtu_vti6_default_mtu vti6: default MTU assignment"
NS_A="ns-$(mktemp -u XXXXXX)"
NS_B="ns-$(mktemp -u XXXXXX)"
@ -225,6 +229,18 @@ test_pmtu_vti4_default_mtu() {
fi
}
test_pmtu_vti6_default_mtu() {
setup namespaces veth vti6 || return 2
# Check that MTU of vti device is MTU of veth minus IPv6 header length
veth_mtu="$(link_get_mtu "${ns_a}" veth_a)"
vti6_mtu="$(link_get_mtu "${ns_a}" vti6_a)"
if [ $((veth_mtu - vti6_mtu)) -ne 40 ]; then
err " vti MTU ${vti6_mtu} is not veth MTU ${veth_mtu} minus IPv6 header length"
return 1
fi
}
trap cleanup EXIT
exitcode=0