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-rwxr-xr-xtools/testing/selftests/net/pmtu.sh377
1 files changed, 359 insertions, 18 deletions
diff --git a/tools/testing/selftests/net/pmtu.sh b/tools/testing/selftests/net/pmtu.sh
index a369d616b390..e2c94e47707c 100755
--- a/tools/testing/selftests/net/pmtu.sh
+++ b/tools/testing/selftests/net/pmtu.sh
@@ -26,6 +26,47 @@
# - pmtu_ipv6
# Same as pmtu_ipv4, except for locked PMTU tests, using IPv6
#
+# - pmtu_ipv4_vxlan4_exception
+# Set up the same network topology as pmtu_ipv4, create a VXLAN tunnel
+# over IPv4 between A and B, routed via R1. On the link between R1 and B,
+# set a MTU lower than the VXLAN MTU and the MTU on the link between A and
+# R1. Send IPv4 packets, exceeding the MTU between R1 and B, over VXLAN
+# from A to B and check that the PMTU exception is created with the right
+# value on A
+#
+# - pmtu_ipv6_vxlan4_exception
+# Same as pmtu_ipv4_vxlan4_exception, but send IPv6 packets from A to B
+#
+# - pmtu_ipv4_vxlan6_exception
+# Same as pmtu_ipv4_vxlan4_exception, but use IPv6 transport from A to B
+#
+# - 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_ipv{4,6}_fou{4,6}_exception
+# Same as pmtu_ipv4_vxlan4, but using a direct IPv4/IPv6 encapsulation
+# (FoU) over IPv4/IPv6, instead of VXLAN
+#
+# - pmtu_ipv{4,6}_fou{4,6}_exception
+# Same as pmtu_ipv4_vxlan4, but using a generic UDP IPv4/IPv6
+# encapsulation (GUE) over IPv4/IPv6, 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
@@ -72,6 +113,22 @@ which ping6 > /dev/null 2>&1 && ping6=$(which ping6) || ping6=$(which ping)
tests="
pmtu_ipv4_exception ipv4: PMTU exceptions
pmtu_ipv6_exception ipv6: PMTU exceptions
+ pmtu_ipv4_vxlan4_exception IPv4 over vxlan4: PMTU exceptions
+ 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_ipv4_fou4_exception IPv4 over fou4: PMTU exceptions
+ pmtu_ipv6_fou4_exception IPv6 over fou4: PMTU exceptions
+ pmtu_ipv4_fou6_exception IPv4 over fou6: PMTU exceptions
+ pmtu_ipv6_fou6_exception IPv6 over fou6: PMTU exceptions
+ pmtu_ipv4_gue4_exception IPv4 over gue4: PMTU exceptions
+ pmtu_ipv6_gue4_exception IPv6 over gue4: PMTU exceptions
+ pmtu_ipv4_gue6_exception IPv4 over gue6: PMTU exceptions
+ pmtu_ipv6_gue6_exception IPv6 over gue6: PMTU exceptions
pmtu_vti6_exception vti6: PMTU exceptions
pmtu_vti4_exception vti4: PMTU exceptions
pmtu_vti4_default_mtu vti4: default MTU assignment
@@ -95,8 +152,8 @@ ns_r2="ip netns exec ${NS_R2}"
# Addresses are:
# - IPv4: PREFIX4.SEGMENT.ID (/24)
# - IPv6: PREFIX6:SEGMENT::ID (/64)
-prefix4="192.168"
-prefix6="fd00"
+prefix4="10.0"
+prefix6="fc00"
a_r1=1
a_r2=2
b_r1=3
@@ -129,12 +186,12 @@ veth6_a_addr="fd00:1::a"
veth6_b_addr="fd00:1::b"
veth6_mask="64"
-vti4_a_addr="192.168.2.1"
-vti4_b_addr="192.168.2.2"
-vti4_mask="24"
-vti6_a_addr="fd00:2::a"
-vti6_b_addr="fd00:2::b"
-vti6_mask="64"
+tunnel4_a_addr="192.168.2.1"
+tunnel4_b_addr="192.168.2.2"
+tunnel4_mask="24"
+tunnel6_a_addr="fd00:2::a"
+tunnel6_b_addr="fd00:2::b"
+tunnel6_mask="64"
dummy6_0_addr="fc00:1000::0"
dummy6_1_addr="fc00:1001::0"
@@ -159,6 +216,89 @@ nsname() {
eval echo \$NS_$1
}
+setup_fou_or_gue() {
+ outer="${1}"
+ inner="${2}"
+ encap="${3}"
+
+ if [ "${outer}" = "4" ]; then
+ modprobe fou || return 2
+ a_addr="${prefix4}.${a_r1}.1"
+ b_addr="${prefix4}.${b_r1}.1"
+ if [ "${inner}" = "4" ]; then
+ type="ipip"
+ ipproto="4"
+ else
+ type="sit"
+ ipproto="41"
+ fi
+ else
+ modprobe fou6 || return 2
+ a_addr="${prefix6}:${a_r1}::1"
+ b_addr="${prefix6}:${b_r1}::1"
+ if [ "${inner}" = "4" ]; then
+ type="ip6tnl"
+ mode="mode ipip6"
+ ipproto="4 -6"
+ else
+ type="ip6tnl"
+ mode="mode ip6ip6"
+ ipproto="41 -6"
+ fi
+ fi
+
+ ${ns_a} ip fou add port 5555 ipproto ${ipproto} || return 2
+ ${ns_a} ip link add ${encap}_a type ${type} ${mode} local ${a_addr} remote ${b_addr} encap ${encap} encap-sport auto encap-dport 5556 || return 2
+
+ ${ns_b} ip fou add port 5556 ipproto ${ipproto}
+ ${ns_b} ip link add ${encap}_b type ${type} ${mode} local ${b_addr} remote ${a_addr} encap ${encap} encap-sport auto encap-dport 5555
+
+ if [ "${inner}" = "4" ]; then
+ ${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev ${encap}_a
+ ${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ${encap}_b
+ else
+ ${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev ${encap}_a
+ ${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ${encap}_b
+ fi
+
+ ${ns_a} ip link set ${encap}_a up
+ ${ns_b} ip link set ${encap}_b up
+
+ sleep 1
+}
+
+setup_fou44() {
+ setup_fou_or_gue 4 4 fou
+}
+
+setup_fou46() {
+ setup_fou_or_gue 4 6 fou
+}
+
+setup_fou64() {
+ setup_fou_or_gue 6 4 fou
+}
+
+setup_fou66() {
+ setup_fou_or_gue 6 6 fou
+}
+
+setup_gue44() {
+ setup_fou_or_gue 4 4 gue
+}
+
+setup_gue46() {
+ setup_fou_or_gue 4 6 gue
+}
+
+setup_gue64() {
+ setup_fou_or_gue 6 4 gue
+}
+
+setup_gue66() {
+ setup_fou_or_gue 6 6 gue
+}
+
setup_namespaces() {
for n in ${NS_A} ${NS_B} ${NS_R1} ${NS_R2}; do
ip netns add ${n} || return 1
@@ -202,11 +342,57 @@ setup_vti() {
}
setup_vti4() {
- setup_vti 4 ${veth4_a_addr} ${veth4_b_addr} ${vti4_a_addr} ${vti4_b_addr} ${vti4_mask}
+ setup_vti 4 ${veth4_a_addr} ${veth4_b_addr} ${tunnel4_a_addr} ${tunnel4_b_addr} ${tunnel4_mask}
}
setup_vti6() {
- setup_vti 6 ${veth6_a_addr} ${veth6_b_addr} ${vti6_a_addr} ${vti6_b_addr} ${vti6_mask}
+ setup_vti 6 ${veth6_a_addr} ${veth6_b_addr} ${tunnel6_a_addr} ${tunnel6_b_addr} ${tunnel6_mask}
+}
+
+setup_vxlan_or_geneve() {
+ type="${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 ${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 ${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 ${type}_a
+ ${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ${type}_b
+
+ ${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_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_or_geneve vxlan ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1
}
setup_xfrm() {
@@ -465,6 +651,161 @@ test_pmtu_ipv6_exception() {
test_pmtu_ipvX 6
}
+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 ${type}4 || return 2
+ # IPv4 header UDP header VXLAN/GENEVE header Ethernet header
+ exp_mtu=$((${ll_mtu} - 20 - 8 - 8 - 14))
+ else
+ setup namespaces routing ${type}6 || return 2
+ # IPv6 header UDP header VXLAN/GENEVE header Ethernet header
+ exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14))
+ fi
+
+ trace "${ns_a}" ${type}_a "${ns_b}" ${type}_b \
+ "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \
+ "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B
+
+ if [ ${family} -eq 4 ]; then
+ ping=ping
+ dst=${tunnel4_b_addr}
+ else
+ ping=${ping6}
+ dst=${tunnel6_b_addr}
+ fi
+
+ # Create route exception by exceeding link layer MTU
+ mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000))
+ mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000))
+ mtu "${ns_b}" veth_B-R1 ${ll_mtu}
+ mtu "${ns_r1}" veth_R1-B ${ll_mtu}
+
+ mtu "${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 ${type} interface"
+}
+
+test_pmtu_ipv4_vxlan4_exception() {
+ test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 4 4
+}
+
+test_pmtu_ipv6_vxlan4_exception() {
+ test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 6 4
+}
+
+test_pmtu_ipv4_geneve4_exception() {
+ test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 4 4
+}
+
+test_pmtu_ipv6_geneve4_exception() {
+ test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 6 4
+}
+
+test_pmtu_ipv4_vxlan6_exception() {
+ test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 4 6
+}
+
+test_pmtu_ipv6_vxlan6_exception() {
+ test_pmtu_ipvX_over_vxlanY_or_geneveY_exception vxlan 6 6
+}
+
+test_pmtu_ipv4_geneve6_exception() {
+ test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 4 6
+}
+
+test_pmtu_ipv6_geneve6_exception() {
+ test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 6 6
+}
+
+test_pmtu_ipvX_over_fouY_or_gueY() {
+ inner_family=${1}
+ outer_family=${2}
+ encap=${3}
+ ll_mtu=4000
+
+ setup namespaces routing ${encap}${outer_family}${inner_family} || return 2
+ trace "${ns_a}" ${encap}_a "${ns_b}" ${encap}_b \
+ "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \
+ "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B
+
+ if [ ${inner_family} -eq 4 ]; then
+ ping=ping
+ dst=${tunnel4_b_addr}
+ else
+ ping=${ping6}
+ dst=${tunnel6_b_addr}
+ fi
+
+ if [ "${encap}" = "gue" ]; then
+ encap_overhead=4
+ else
+ encap_overhead=0
+ fi
+
+ if [ ${outer_family} -eq 4 ]; then
+ # IPv4 header UDP header
+ exp_mtu=$((${ll_mtu} - 20 - 8 - ${encap_overhead}))
+ else
+ # IPv6 header Option 4 UDP header
+ exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - ${encap_overhead}))
+ fi
+
+ # Create route exception by exceeding link layer MTU
+ mtu "${ns_a}" veth_A-R1 $((${ll_mtu} + 1000))
+ mtu "${ns_r1}" veth_R1-A $((${ll_mtu} + 1000))
+ mtu "${ns_b}" veth_B-R1 ${ll_mtu}
+ mtu "${ns_r1}" veth_R1-B ${ll_mtu}
+
+ mtu "${ns_a}" ${encap}_a $((${ll_mtu} + 1000))
+ mtu "${ns_b}" ${encap}_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 ${encap} interface"
+}
+
+test_pmtu_ipv4_fou4_exception() {
+ test_pmtu_ipvX_over_fouY_or_gueY 4 4 fou
+}
+
+test_pmtu_ipv6_fou4_exception() {
+ test_pmtu_ipvX_over_fouY_or_gueY 6 4 fou
+}
+
+test_pmtu_ipv4_fou6_exception() {
+ test_pmtu_ipvX_over_fouY_or_gueY 4 6 fou
+}
+
+test_pmtu_ipv6_fou6_exception() {
+ test_pmtu_ipvX_over_fouY_or_gueY 6 6 fou
+}
+
+test_pmtu_ipv4_gue4_exception() {
+ test_pmtu_ipvX_over_fouY_or_gueY 4 4 gue
+}
+
+test_pmtu_ipv6_gue4_exception() {
+ test_pmtu_ipvX_over_fouY_or_gueY 6 4 gue
+}
+
+test_pmtu_ipv4_gue6_exception() {
+ test_pmtu_ipvX_over_fouY_or_gueY 4 6 gue
+}
+
+test_pmtu_ipv6_gue6_exception() {
+ test_pmtu_ipvX_over_fouY_or_gueY 6 6 gue
+}
+
test_pmtu_vti4_exception() {
setup namespaces veth vti4 xfrm4 || return 2
trace "${ns_a}" veth_a "${ns_b}" veth_b \
@@ -484,14 +825,14 @@ test_pmtu_vti4_exception() {
# Send DF packet without exceeding link layer MTU, check that no
# 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})"
+ ${ns_a} ping -q -M want -i 0.1 -w 2 -s ${ping_payload} ${tunnel4_b_addr} > /dev/null
+ pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})"
check_pmtu_value "" "${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})"
+ ${ns_a} ping -q -M want -i 0.1 -w 2 -s $((ping_payload + 1)) ${tunnel4_b_addr} > /dev/null
+ pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel4_b_addr})"
check_pmtu_value "${esp_payload_rfc4106}" "${pmtu}" "exceeding PMTU (IP payload length $((esp_payload_rfc4106 + 1)))"
}
@@ -506,20 +847,20 @@ test_pmtu_vti6_exception() {
mtu "${ns_b}" veth_b 4000
mtu "${ns_a}" vti6_a 5000
mtu "${ns_b}" vti6_b 5000
- ${ns_a} ${ping6} -q -i 0.1 -w 2 -s 60000 ${vti6_b_addr} > /dev/null
+ ${ns_a} ${ping6} -q -i 0.1 -w 2 -s 60000 ${tunnel6_b_addr} > /dev/null
# Check that exception was created
- pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${vti6_b_addr})"
+ pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})"
check_pmtu_value any "${pmtu}" "creating tunnel exceeding link layer MTU" || return 1
# Decrease tunnel MTU, check for PMTU decrease in route exception
mtu "${ns_a}" vti6_a 3000
- pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${vti6_b_addr})"
+ pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})"
check_pmtu_value "3000" "${pmtu}" "decreasing tunnel MTU" || fail=1
# Increase tunnel MTU, check for PMTU increase in route exception
mtu "${ns_a}" vti6_a 9000
- pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${vti6_b_addr})"
+ pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${tunnel6_b_addr})"
check_pmtu_value "9000" "${pmtu}" "increasing tunnel MTU" || fail=1
return ${fail}
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