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selftests: pmtu: implement IPIP, SIT and ip6tnl PMTU discovery tests
Add PMTU discovery tests for these encapsulations: - IPIP - SIT, mode ip6ip - ip6tnl, modes ip6ip6 and ipip6 Signed-off-by: Lourdes Pedrajas <lu@pplo.net> Reviewed-by: Stefano Brivio <sbrivio@redhat.com> Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lourdes Pedrajas
David S. Miller
parent
cceadc831e
commit
b66c9b8de2
@ -67,6 +67,10 @@
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# Same as pmtu_ipv4_vxlan4, but using a generic UDP IPv4/IPv6
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# encapsulation (GUE) over IPv4/IPv6, instead of VXLAN
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#
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# - pmtu_ipv{4,6}_ipv{4,6}_exception
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# Same as pmtu_ipv4_vxlan4, but using a IPv4/IPv6 tunnel over IPv4/IPv6,
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# instead of 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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@ -151,6 +155,10 @@ tests="
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pmtu_ipv6_gue4_exception IPv6 over gue4: PMTU exceptions 1
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pmtu_ipv4_gue6_exception IPv4 over gue6: PMTU exceptions 1
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pmtu_ipv6_gue6_exception IPv6 over gue6: PMTU exceptions 1
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pmtu_ipv4_ipv4_exception IPv4 over IPv4: PMTU exceptions 1
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pmtu_ipv6_ipv4_exception IPv6 over IPv4: PMTU exceptions 1
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pmtu_ipv4_ipv6_exception IPv4 over IPv6: PMTU exceptions 1
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pmtu_ipv6_ipv6_exception IPv6 over IPv6: PMTU exceptions 1
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pmtu_vti6_exception vti6: PMTU exceptions 0
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pmtu_vti4_exception vti4: PMTU exceptions 0
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pmtu_vti4_default_mtu vti4: default MTU assignment 0
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@ -363,6 +371,62 @@ setup_gue66() {
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setup_fou_or_gue 6 6 gue
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}
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setup_ipvX_over_ipvY() {
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inner=${1}
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outer=${2}
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if [ "${outer}" -eq 4 ]; then
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a_addr="${prefix4}.${a_r1}.1"
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b_addr="${prefix4}.${b_r1}.1"
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if [ "${inner}" -eq 4 ]; then
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type="ipip"
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mode="ipip"
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else
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type="sit"
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mode="ip6ip"
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fi
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else
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a_addr="${prefix6}:${a_r1}::1"
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b_addr="${prefix6}:${b_r1}::1"
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type="ip6tnl"
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if [ "${inner}" -eq 4 ]; then
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mode="ipip6"
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else
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mode="ip6ip6"
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fi
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fi
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run_cmd ${ns_a} ip link add ip_a type ${type} local ${a_addr} remote ${b_addr} mode ${mode} || return 2
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run_cmd ${ns_b} ip link add ip_b type ${type} local ${b_addr} remote ${a_addr} mode ${mode}
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run_cmd ${ns_a} ip link set ip_a up
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run_cmd ${ns_b} ip link set ip_b up
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if [ "${inner}" = "4" ]; then
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run_cmd ${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev ip_a
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run_cmd ${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ip_b
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else
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run_cmd ${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev ip_a
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run_cmd ${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ip_b
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fi
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}
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setup_ip4ip4() {
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setup_ipvX_over_ipvY 4 4
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}
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setup_ip6ip4() {
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setup_ipvX_over_ipvY 6 4
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}
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setup_ip4ip6() {
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setup_ipvX_over_ipvY 4 6
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}
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setup_ip6ip6() {
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setup_ipvX_over_ipvY 6 6
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}
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setup_namespaces() {
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for n in ${NS_A} ${NS_B} ${NS_R1} ${NS_R2}; do
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ip netns add ${n} || return 1
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@ -908,6 +972,64 @@ test_pmtu_ipv6_gue6_exception() {
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test_pmtu_ipvX_over_fouY_or_gueY 6 6 gue
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}
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test_pmtu_ipvX_over_ipvY_exception() {
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inner=${1}
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outer=${2}
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ll_mtu=4000
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setup namespaces routing ip${inner}ip${outer} || return 2
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trace "${ns_a}" ip_a "${ns_b}" ip_b \
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"${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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if [ ${inner} -eq 4 ]; then
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ping=ping
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dst=${tunnel4_b_addr}
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else
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ping=${ping6}
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dst=${tunnel6_b_addr}
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fi
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if [ ${outer} -eq 4 ]; then
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# IPv4 header
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exp_mtu=$((${ll_mtu} - 20))
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else
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# IPv6 header Option 4
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exp_mtu=$((${ll_mtu} - 40 - 8))
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fi
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# Create route exception by exceeding link layer MTU
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mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000))
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mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000))
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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}" ip_a $((${ll_mtu} + 1000)) || return
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mtu "${ns_b}" ip_b $((${ll_mtu} + 1000)) || return
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run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst}
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# Check that exception was created
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pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})"
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check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on ip${inner}ip${outer} interface"
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}
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test_pmtu_ipv4_ipv4_exception() {
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test_pmtu_ipvX_over_ipvY_exception 4 4
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}
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test_pmtu_ipv6_ipv4_exception() {
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test_pmtu_ipvX_over_ipvY_exception 6 4
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}
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test_pmtu_ipv4_ipv6_exception() {
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test_pmtu_ipvX_over_ipvY_exception 4 6
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}
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test_pmtu_ipv6_ipv6_exception() {
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test_pmtu_ipvX_over_ipvY_exception 6 6
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}
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test_pmtu_vti4_exception() {
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setup namespaces veth vti4 xfrm4 || return 2
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trace "${ns_a}" veth_a "${ns_b}" veth_b \
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