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: Stefano Brivio <sbrivio@redhat.com> Reviewed-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stefano Brivio
David S. Miller
parent
a025fb5f49
commit
ce7336610c
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@ -43,6 +43,22 @@
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# - pmtu_ipv6_vxlan6_exception
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# Same as pmtu_ipv4_vxlan6_exception, but send IPv6 packets from A to B
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#
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# - pmtu_ipv4_geneve4_exception
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# Same as pmtu_ipv4_vxlan4_exception, but using a GENEVE tunnel instead of
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# VXLAN
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#
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# - pmtu_ipv6_geneve4_exception
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# Same as pmtu_ipv6_vxlan4_exception, but using a GENEVE tunnel instead of
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# VXLAN
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#
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# - pmtu_ipv4_geneve6_exception
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# Same as pmtu_ipv4_vxlan6_exception, but using a GENEVE tunnel instead of
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# VXLAN
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#
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# - pmtu_ipv6_geneve6_exception
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# Same as pmtu_ipv6_vxlan6_exception, but using a GENEVE tunnel instead of
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# VXLAN
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#
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# - pmtu_vti4_exception
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# Set up vti tunnel on top of veth, with xfrm states and policies, in two
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# namespaces with matching endpoints. Check that route exception is not
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@ -93,6 +109,10 @@ tests="
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pmtu_ipv6_vxlan4_exception IPv6 over vxlan4: PMTU exceptions
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pmtu_ipv4_vxlan6_exception IPv4 over vxlan6: PMTU exceptions
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pmtu_ipv6_vxlan6_exception IPv6 over vxlan6: PMTU exceptions
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pmtu_ipv4_geneve4_exception IPv4 over geneve4: PMTU exceptions
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pmtu_ipv6_geneve4_exception IPv6 over geneve4: PMTU exceptions
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pmtu_ipv4_geneve6_exception IPv4 over geneve6: PMTU exceptions
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pmtu_ipv6_geneve6_exception IPv6 over geneve6: PMTU exceptions
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pmtu_vti6_exception vti6: PMTU exceptions
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pmtu_vti4_exception vti4: PMTU exceptions
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pmtu_vti4_default_mtu vti4: default MTU assignment
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@ -230,32 +250,50 @@ setup_vti6() {
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setup_vti 6 ${veth6_a_addr} ${veth6_b_addr} ${tunnel6_a_addr} ${tunnel6_b_addr} ${tunnel6_mask}
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}
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setup_vxlan() {
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a_addr="${1}"
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b_addr="${2}"
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opts="${3}"
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setup_vxlan_or_geneve() {
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type="${1}"
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a_addr="${2}"
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b_addr="${3}"
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opts="${4}"
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${ns_a} ip link add vxlan_a type vxlan id 1 local ${a_addr} remote ${b_addr} ttl 64 dstport 4789 ${opts} || return 1
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${ns_b} ip link add vxlan_b type vxlan id 1 local ${b_addr} remote ${a_addr} ttl 64 dstport 4789 ${opts}
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if [ "${type}" = "vxlan" ]; then
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opts="${opts} ttl 64 dstport 4789"
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opts_a="local ${a_addr}"
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opts_b="local ${b_addr}"
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else
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opts_a=""
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opts_b=""
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fi
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${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev vxlan_a
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${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev vxlan_b
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${ns_a} ip link add ${type}_a type ${type} id 1 ${opts_a} remote ${b_addr} ${opts} || return 1
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${ns_b} ip link add ${type}_b type ${type} id 1 ${opts_b} remote ${a_addr} ${opts}
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${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev vxlan_a
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${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev vxlan_b
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${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev ${type}_a
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${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ${type}_b
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${ns_a} ip link set vxlan_a up
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${ns_b} ip link set vxlan_b up
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${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev ${type}_a
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${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ${type}_b
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${ns_a} ip link set ${type}_a up
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${ns_b} ip link set ${type}_b up
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sleep 1
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}
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setup_geneve4() {
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setup_vxlan_or_geneve geneve ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set"
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}
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setup_vxlan4() {
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setup_vxlan ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set"
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setup_vxlan_or_geneve vxlan ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set"
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}
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setup_geneve6() {
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setup_vxlan_or_geneve geneve ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1
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}
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setup_vxlan6() {
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setup_vxlan ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 ""
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setup_vxlan_or_geneve vxlan ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1
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}
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setup_xfrm() {
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@ -514,22 +552,23 @@ test_pmtu_ipv6_exception() {
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test_pmtu_ipvX 6
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}
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test_pmtu_ipvX_over_vxlanY_exception() {
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family=${1}
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outer_family=${2}
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test_pmtu_ipvX_over_vxlanY_or_geneveY_exception() {
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type=${1}
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family=${2}
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outer_family=${3}
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ll_mtu=4000
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if [ ${outer_family} -eq 4 ]; then
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setup namespaces routing vxlan4 || return 2
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# IPv4 header UDP header VXLAN header Ethernet header
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exp_mtu=$((${ll_mtu} - 20 - 8 - 8 - 14))
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setup namespaces routing ${type}4 || return 2
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# IPv4 header UDP header VXLAN/GENEVE header Ethernet header
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exp_mtu=$((${ll_mtu} - 20 - 8 - 8 - 14))
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else
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setup namespaces routing vxlan6 || return 2
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# IPv6 header UDP header VXLAN header Ethernet header
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exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14))
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setup namespaces routing ${type}6 || return 2
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# IPv6 header UDP header VXLAN/GENEVE header Ethernet header
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exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14))
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fi
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trace "${ns_a}" vxlan_a "${ns_b}" vxlan_b \
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trace "${ns_a}" ${type}_a "${ns_b}" ${type}_b \
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"${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \
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"${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B
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@ -547,29 +586,45 @@ test_pmtu_ipvX_over_vxlanY_exception() {
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mtu "${ns_b}" veth_B-R1 ${ll_mtu}
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mtu "${ns_r1}" veth_R1-B ${ll_mtu}
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mtu "${ns_a}" vxlan_a $((${ll_mtu} + 1000))
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mtu "${ns_b}" vxlan_b $((${ll_mtu} + 1000))
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mtu "${ns_a}" ${type}_a $((${ll_mtu} + 1000))
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mtu "${ns_b}" ${type}_b $((${ll_mtu} + 1000))
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${ns_a} ${ping} -q -M want -i 0.1 -w 2 -s $((${ll_mtu} + 500)) ${dst} > /dev/null
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# Check that exception was created
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pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})"
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check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on VXLAN interface"
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check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on ${type} interface"
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}
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test_pmtu_ipv4_vxlan4_exception() {
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test_pmtu_ipvX_over_vxlanY_exception 4 4
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test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 4 4
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}
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test_pmtu_ipv6_vxlan4_exception() {
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test_pmtu_ipvX_over_vxlanY_exception 6 4
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test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 6 4
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}
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test_pmtu_ipv4_geneve4_exception() {
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test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 4 4
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}
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test_pmtu_ipv6_geneve4_exception() {
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test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 6 4
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}
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test_pmtu_ipv4_vxlan6_exception() {
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test_pmtu_ipvX_over_vxlanY_exception 4 6
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test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 4 6
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}
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test_pmtu_ipv6_vxlan6_exception() {
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test_pmtu_ipvX_over_vxlanY_exception 6 6
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test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 6 6
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}
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test_pmtu_ipv4_geneve6_exception() {
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test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 4 6
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}
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test_pmtu_ipv6_geneve6_exception() {
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test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 6 6
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}
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test_pmtu_vti4_exception() {
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