selftests: pmtu: Introduce check_pmtu_value() (1e0a7207) · Commits · 戴 / test

tools/testing/selftests/net/pmtu.sh

+22 −27

Original line number	Diff line number	Diff line
		@@ -229,6 +229,19 @@ route_get_dst_pmtu_from_exception() {
		mtu_parse "$(route_get_dst_exception "${ns_cmd}" ${dst})"
		}

		check_pmtu_value() {
		expected="${1}"
		value="${2}"
		event="${3}"

		[ "${expected}" = "any" ] && [ -n "${value}" ] && return 0
		[ "${value}" = "${expected}" ] && return 0
		[ -z "${value}" ] && err " PMTU exception wasn't created after ${event}" && return 1
		[ -z "${expected}" ] && err " PMTU exception shouldn't exist after ${event}" && return 1
		err " found PMTU exception with incorrect MTU ${value}, expected ${expected}, after ${event}"
		return 1
		}

		test_pmtu_vti4_exception() {
		setup namespaces veth vti4 xfrm4 \|\| return 2

		@@ -248,24 +261,13 @@ test_pmtu_vti4_exception() {
		# exception is created
		${ns_a} ping -q -M want -i 0.1 -w 2 -s ${ping_payload} ${vti4_b_addr} > /dev/null
		pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${vti4_b_addr})"
		if [ "${pmtu}" != "" ]; then
		err " unexpected exception created with PMTU ${pmtu} for IP payload length ${esp_payload_rfc4106}"
		return 1
		fi
		check_pmtu_value "" "${pmtu}" "sending packet smaller than PMTU (IP payload length ${esp_payload_rfc4106})" \|\| return 1

		# Now exceed link layer MTU by one byte, check that exception is created
		# with the right PMTU value
		${ns_a} ping -q -M want -i 0.1 -w 2 -s $((ping_payload + 1)) ${vti4_b_addr} > /dev/null
		pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${vti4_b_addr})"
		if [ "${pmtu}" = "" ]; then
		err " exception not created for IP payload length $((esp_payload_rfc4106 + 1))"
		return 1
		fi

		# ...with the right PMTU value
		if [ ${pmtu} -ne ${esp_payload_rfc4106} ]; then
		err " wrong PMTU ${pmtu} in exception, expected: ${esp_payload_rfc4106}"
		return 1
		fi
		check_pmtu_value "${esp_payload_rfc4106}" "${pmtu}" "exceeding PMTU (IP payload length $((esp_payload_rfc4106 + 1)))"
		}

		test_pmtu_vti6_exception() {
		@@ -280,25 +282,18 @@ test_pmtu_vti6_exception() {
		${ns_a} ${ping6} -q -i 0.1 -w 2 -s 60000 ${vti6_b_addr} > /dev/null

		# Check that exception was created
		if [ "$(route_get_dst_pmtu_from_exception "${ns_a}" ${vti6_b_addr})" = "" ]; then
		err " tunnel exceeding link layer MTU didn't create route exception"
		return 1
		fi
		pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${vti6_b_addr})"
		check_pmtu_value any "${pmtu}" "creating tunnel exceeding link layer MTU" \|\| return 1

		# Decrease tunnel MTU, check for PMTU decrease in route exception
		mtu "${ns_a}" vti6_a 3000

		if [ "$(route_get_dst_pmtu_from_exception "${ns_a}" ${vti6_b_addr})" -ne 3000 ]; then
		err " decreasing tunnel MTU didn't decrease route exception PMTU"
		fail=1
		fi
		pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${vti6_b_addr})"
		check_pmtu_value "3000" "${pmtu}" "decreasing tunnel MTU" \|\| fail=1

		# Increase tunnel MTU, check for PMTU increase in route exception
		mtu "${ns_a}" vti6_a 9000
		if [ "$(route_get_dst_pmtu_from_exception "${ns_a}" ${vti6_b_addr})" -ne 9000 ]; then
		err " increasing tunnel MTU didn't increase route exception PMTU"
		fail=1
		fi
		pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${vti6_b_addr})"
		check_pmtu_value "9000" "${pmtu}" "increasing tunnel MTU" \|\| fail=1

		return ${fail}
		}

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