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Commit ce733661 authored by Stefano Brivio's avatar Stefano Brivio Committed by David S. Miller
Browse files

selftests: pmtu: Introduce tests for IPv4/IPv6 over GENEVE over IPv4/IPv6 



Use a router between endpoints, implemented via namespaces, set a low MTU
between router and destination endpoint, exceed it and check PMTU value in
route exceptions.

v2:
- Introduce IPv4 tests right away, if iproute2 doesn't support the 'df'
  link option they will be skipped (David Ahern)

Signed-off-by: default avatarStefano Brivio <sbrivio@redhat.com>
Reviewed-by: default avatarSabrina Dubroca <sd@queasysnail.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a025fb5f

tools/testing/selftests/net/pmtu.sh

+86 −31
Original line number Diff line number Diff line
@@ -43,6 +43,22 @@ 
# - pmtu_ipv6_vxlan6_exception

#	Same as pmtu_ipv4_vxlan6_exception, but send IPv6 packets from A to B

#

# - pmtu_ipv4_geneve4_exception

#	Same as pmtu_ipv4_vxlan4_exception, but using a GENEVE tunnel instead of

#	VXLAN

#

# - pmtu_ipv6_geneve4_exception

#	Same as pmtu_ipv6_vxlan4_exception, but using a GENEVE tunnel instead of

#	VXLAN

#

# - pmtu_ipv4_geneve6_exception

#	Same as pmtu_ipv4_vxlan6_exception, but using a GENEVE tunnel instead of

#	VXLAN

#

# - pmtu_ipv6_geneve6_exception

#	Same as pmtu_ipv6_vxlan6_exception, but using a GENEVE tunnel instead of

#	VXLAN

#

# - pmtu_vti4_exception

#	Set up vti tunnel on top of veth, with xfrm states and policies, in two

#	namespaces with matching endpoints. Check that route exception is not
@@ -93,6 +109,10 @@ tests=" 
	pmtu_ipv6_vxlan4_exception	IPv6 over vxlan4: PMTU exceptions

	pmtu_ipv4_vxlan6_exception	IPv4 over vxlan6: PMTU exceptions

	pmtu_ipv6_vxlan6_exception	IPv6 over vxlan6: PMTU exceptions

	pmtu_ipv4_geneve4_exception	IPv4 over geneve4: PMTU exceptions

	pmtu_ipv6_geneve4_exception	IPv6 over geneve4: PMTU exceptions

	pmtu_ipv4_geneve6_exception	IPv4 over geneve6: PMTU exceptions

	pmtu_ipv6_geneve6_exception	IPv6 over geneve6: PMTU exceptions

	pmtu_vti6_exception		vti6: PMTU exceptions

	pmtu_vti4_exception		vti4: PMTU exceptions

	pmtu_vti4_default_mtu		vti4: default MTU assignment
@@ -230,32 +250,50 @@ setup_vti6() { 
	setup_vti 6 ${veth6_a_addr} ${veth6_b_addr} ${tunnel6_a_addr} ${tunnel6_b_addr} ${tunnel6_mask}

}



setup_vxlan() {

	a_addr="${1}"

	b_addr="${2}"

	opts="${3}"

setup_vxlan_or_geneve() {

	type="${1}"

	a_addr="${2}"

	b_addr="${3}"

	opts="${4}"



	if [ "${type}" = "vxlan" ]; then

		opts="${opts} ttl 64 dstport 4789"

		opts_a="local ${a_addr}"

		opts_b="local ${b_addr}"

	else

		opts_a=""

		opts_b=""

	fi



	${ns_a} ip link add vxlan_a type vxlan id 1 local ${a_addr} remote ${b_addr} ttl 64 dstport 4789 ${opts} || return 1

	${ns_b} ip link add vxlan_b type vxlan id 1 local ${b_addr} remote ${a_addr} ttl 64 dstport 4789 ${opts}

	${ns_a} ip link add ${type}_a type ${type} id 1 ${opts_a} remote ${b_addr} ${opts} || return 1

	${ns_b} ip link add ${type}_b type ${type} id 1 ${opts_b} remote ${a_addr} ${opts}



	${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask}   dev vxlan_a

	${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask}   dev vxlan_b

	${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev ${type}_a

	${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ${type}_b



	${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask}   dev vxlan_a

	${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask}   dev vxlan_b

	${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev ${type}_a

	${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ${type}_b



	${ns_a} ip link set vxlan_a up

	${ns_b} ip link set vxlan_b up

	${ns_a} ip link set ${type}_a up

	${ns_b} ip link set ${type}_b up



	sleep 1

}



setup_geneve4() {

	setup_vxlan_or_geneve geneve ${prefix4}.${a_r1}.1  ${prefix4}.${b_r1}.1  "df set"

}



setup_vxlan4() {

	setup_vxlan ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set"

	setup_vxlan_or_geneve vxlan  ${prefix4}.${a_r1}.1  ${prefix4}.${b_r1}.1  "df set"

}



setup_geneve6() {

	setup_vxlan_or_geneve geneve ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1

}



setup_vxlan6() {

	setup_vxlan ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 ""

	setup_vxlan_or_geneve vxlan  ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1

}



setup_xfrm() {
@@ -514,22 +552,23 @@ test_pmtu_ipv6_exception() { 
	test_pmtu_ipvX 6

}



test_pmtu_ipvX_over_vxlanY_exception() {

	family=${1}

	outer_family=${2}

test_pmtu_ipvX_over_vxlanY_or_geneveY_exception() {

	type=${1}

	family=${2}

	outer_family=${3}

	ll_mtu=4000



	if [ ${outer_family} -eq 4 ]; then

		setup namespaces routing vxlan4 || return 2

		#                      IPv4 header   UDP header   VXLAN header   Ethernet header

		setup namespaces routing ${type}4 || return 2

		#                      IPv4 header   UDP header   VXLAN/GENEVE header   Ethernet header

		exp_mtu=$((${ll_mtu} - 20          - 8          - 8                   - 14))

	else

		setup namespaces routing vxlan6 || return 2

		#                      IPv6 header   UDP header   VXLAN header   Ethernet header

		setup namespaces routing ${type}6 || return 2

		#                      IPv6 header   UDP header   VXLAN/GENEVE header   Ethernet header

		exp_mtu=$((${ll_mtu} - 40          - 8          - 8                   - 14))

	fi



	trace "${ns_a}" vxlan_a      "${ns_b}"  vxlan_b \

	trace "${ns_a}" ${type}_a    "${ns_b}"  ${type}_b \

	      "${ns_a}" veth_A-R1    "${ns_r1}" veth_R1-A \

	      "${ns_b}" veth_B-R1    "${ns_r1}" veth_R1-B
@@ -547,29 +586,45 @@ test_pmtu_ipvX_over_vxlanY_exception() { 
	mtu "${ns_b}"  veth_B-R1 ${ll_mtu}

	mtu "${ns_r1}" veth_R1-B ${ll_mtu}



	mtu "${ns_a}" vxlan_a $((${ll_mtu} + 1000))

	mtu "${ns_b}" vxlan_b $((${ll_mtu} + 1000))

	mtu "${ns_a}" ${type}_a $((${ll_mtu} + 1000))

	mtu "${ns_b}" ${type}_b $((${ll_mtu} + 1000))

	${ns_a} ${ping} -q -M want -i 0.1 -w 2 -s $((${ll_mtu} + 500)) ${dst} > /dev/null



	# Check that exception was created

	pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})"

	check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on VXLAN interface"

	check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on ${type} interface"

}



test_pmtu_ipv4_vxlan4_exception() {

	test_pmtu_ipvX_over_vxlanY_exception 4 4

	test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan  4 4

}



test_pmtu_ipv6_vxlan4_exception() {

	test_pmtu_ipvX_over_vxlanY_exception 6 4

	test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan  6 4

}



test_pmtu_ipv4_geneve4_exception() {

	test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 4 4

}



test_pmtu_ipv6_geneve4_exception() {

	test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 6 4

}



test_pmtu_ipv4_vxlan6_exception() {

	test_pmtu_ipvX_over_vxlanY_exception 4 6

	test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan  4 6

}



test_pmtu_ipv6_vxlan6_exception() {

	test_pmtu_ipvX_over_vxlanY_exception 6 6

	test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan  6 6

}



test_pmtu_ipv4_geneve6_exception() {

	test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 4 6

}



test_pmtu_ipv6_geneve6_exception() {

	test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 6 6

}



test_pmtu_vti4_exception() {