Commit 8b6022fc authored by Stefano Brivio's avatar Stefano Brivio Committed by David S. Miller
Browse files

selftests: pmtu: Add pmtu_vti6_link_add_mtu test 



Same as pmtu_vti4_link_add_mtu test, but for IPv6.

Signed-off-by: default avatarStefano Brivio <sbrivio@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 719e1215

tools/testing/selftests/net/pmtu.sh

+43 −1
Original line number Diff line number Diff line
@@ -33,13 +33,17 @@ 
# - pmtu_vti4_link_add_mtu

#	Set up vti4 interface passing MTU value at link creation, check MTU is

#	configured, and that link is not created with invalid MTU values

#

# - pmtu_vti6_link_add_mtu

#	Same as above, for IPv6



tests="

	pmtu_vti6_exception	vti6: PMTU exceptions

	pmtu_vti4_exception	vti4: PMTU exceptions

	pmtu_vti4_default_mtu	vti4: default MTU assignment

	pmtu_vti6_default_mtu	vti6: default MTU assignment

	pmtu_vti4_link_add_mtu	vti4: MTU setting on link creation"

	pmtu_vti4_link_add_mtu	vti4: MTU setting on link creation

	pmtu_vti6_link_add_mtu	vti6: MTU setting on link creation"



NS_A="ns-$(mktemp -u XXXXXX)"

NS_B="ns-$(mktemp -u XXXXXX)"
@@ -344,6 +348,44 @@ test_pmtu_vti4_link_add_mtu() { 
	return ${fail}

}



test_pmtu_vti6_link_add_mtu() {

	setup namespaces || return 2



	${ns_a} ip link add vti6_a type vti6 local ${veth6_a_addr} remote ${veth6_b_addr} key 10

	[ $? -ne 0 ] && err "  vti6 not supported" && return 2

	${ns_a} ip link del vti6_a



	fail=0



	min=1280

	max=$((65535 - 40))

	# Check invalid values first

	for v in $((min - 1)) $((max + 1)); do

		${ns_a} ip link add vti6_a mtu ${v} type vti6 local ${veth6_a_addr} remote ${veth6_b_addr} key 10 2>/dev/null

		# This can fail, or MTU can be adjusted to a proper value

		[ $? -ne 0 ] && continue

		mtu="$(link_get_mtu "${ns_a}" vti6_a)"

		if [ ${mtu} -lt ${min} -o ${mtu} -gt ${max} ]; then

			err "  vti6 tunnel created with invalid MTU ${v}"

			fail=1

		fi

		${ns_a} ip link del vti6_a

	done



	# Now check valid values

	for v in 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

		if [ "${mtu}" != "${v}" ]; then

			err "  vti6 MTU ${mtu} doesn't match configured value ${v}"

			fail=1

		fi

	done



	return ${fail}

}



trap cleanup EXIT



exitcode=0