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.
Reviewed-by: Sabrina Dubroca <s...@queasysnail.net>
Signed-off-by: Stefano Brivio <sbri...@redhat.com>
---
This only introduces tests over GENEVE over IPv6 right now. I'll introduce
tests over IPv4 (they can be added trivially) once DF configuration support
is accepted into iproute2.
tools/testing/selftests/net/pmtu.sh | 78 ++++++++++++++++++++---------
1 file changed, 55 insertions(+), 23 deletions(-)
diff --git a/tools/testing/selftests/net/pmtu.sh
b/tools/testing/selftests/net/pmtu.sh
index 19ede74af560..e9bb0c37bdfc 100755
--- a/tools/testing/selftests/net/pmtu.sh
+++ b/tools/testing/selftests/net/pmtu.sh
@@ -37,6 +37,12 @@
# - pmtu_ipv6_vxlan6_exception
# Same as pmtu_ipv4_vxlan6_exception, but send IPv6 packets from A to B
#
+# - pmtu_ipv4_geneve6_exception
+# Same as pmtu_ipv4_vxlan6, but using a GENEVE tunnel instead of VxLAN
+#
+# - pmtu_ipv6_geneve6_exception
+# Same as pmtu_ipv6_vxlan6, 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
@@ -85,6 +91,8 @@ tests="
pmtu_ipv6_exception ipv6: PMTU exceptions
pmtu_ipv4_vxlan6_exception IPv4 over vxlan6: PMTU exceptions
pmtu_ipv6_vxlan6_exception IPv6 over vxlan6: 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
@@ -222,27 +230,42 @@ 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="${2}"
+setup_vxlan_or_geneve() {
+ type="${1}"
+ a_addr="${2}"
+ b_addr="${3}"
+
+ if [ "${type}" = "vxlan" ]; then
+ opts="ttl 64 dstport 4789"
+ opts_a="local ${a_addr}"
+ opts_b="local ${b_addr}"
+ else
+ opts=""
+ 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 || return 1
- ${ns_b} ip link add vxlan_b type vxlan id 1 local ${b_addr} remote
${a_addr} ttl 64 dstport 4789
+ ${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_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() {
@@ -501,15 +524,16 @@ test_pmtu_ipv6_exception() {
test_pmtu_ipvX 6
}
-test_pmtu_ipvX_over_vxlan6_exception() {
- family=${1}
+test_pmtu_ipvX_over_vxlan6_or_geneve6_exception() {
+ type=${1}
+ family=${2}
ll_mtu=4000
- setup namespaces routing vxlan6 || return 2
- # IPv6 header UDP header VxLAN header
Ethernet header
- exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14))
+ setup namespaces routing ${type}6 || return 2
+ # IPv6 header UDP header VxLAN/GENEVE header
Ethernet header
+ exp_mtu=$((${ll_mtu} - 40 - 8 - 8 -
14))
- trace "${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 "${ns_r1}" veth_R1-B
@@ -527,21 +551,29 @@ test_pmtu_ipvX_over_vxlan6_exception() {
mtu "${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_vxlan6_exception() {
- test_pmtu_ipvX_over_vxlan6_exception 4
+ test_pmtu_ipvX_over_vxlan6_or_geneve6_exception vxlan 4
}
test_pmtu_ipv6_vxlan6_exception() {
- test_pmtu_ipvX_over_vxlan6_exception 6
+ test_pmtu_ipvX_over_vxlan6_or_geneve6_exception vxlan 6
+}
+
+test_pmtu_ipv4_geneve6_exception() {
+ test_pmtu_ipvX_over_vxlan6_or_geneve6_exception geneve 4
+}
+
+test_pmtu_ipv6_geneve6_exception() {
+ test_pmtu_ipvX_over_vxlan6_or_geneve6_exception geneve 6
}
test_pmtu_vti4_exception() {
--
2.19.1
