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-rwxr-xr-xtools/testing/selftests/net/pmtu.sh346
1 files changed, 339 insertions, 7 deletions
diff --git a/tools/testing/selftests/net/pmtu.sh b/tools/testing/selftests/net/pmtu.sh
index 77c09cd339c3..6bbf69a28e12 100755
--- a/tools/testing/selftests/net/pmtu.sh
+++ b/tools/testing/selftests/net/pmtu.sh
@@ -59,6 +59,45 @@
# Same as pmtu_ipv6_vxlan6_exception, but using a GENEVE tunnel instead of
# VXLAN
#
+# - pmtu_ipv{4,6}_br_vxlan{4,6}_exception
+# Set up three namespaces, A, B, and C, with routing between A and B over
+# R1. R2 is unused in these tests. A has a veth connection to C, and is
+# connected to B via a VXLAN endpoint, which is directly bridged to C.
+# MTU on the B-R1 link is lower than other MTUs.
+#
+# Check that both C and A are able to communicate with B over the VXLAN
+# tunnel, and that PMTU exceptions with the correct values are created.
+#
+# segment a_r1 segment b_r1 b_r1: 4000
+# .--------------R1--------------. everything
+# C---veth A B else: 5000
+# ' bridge |
+# '---- - - - - - VXLAN - - - - - - - '
+#
+# - pmtu_ipv{4,6}_br_geneve{4,6}_exception
+# Same as pmtu_ipv{4,6}_br_vxlan{4,6}_exception, with a GENEVE tunnel
+# instead.
+#
+# - pmtu_ipv{4,6}_ovs_vxlan{4,6}_exception
+# Set up two namespaces, B, and C, with routing between the init namespace
+# and B over R1. A and R2 are unused in these tests. The init namespace
+# has a veth connection to C, and is connected to B via a VXLAN endpoint,
+# which is handled by Open vSwitch and bridged to C. MTU on the B-R1 link
+# is lower than other MTUs.
+#
+# Check that C is able to communicate with B over the VXLAN tunnel, and
+# that PMTU exceptions with the correct values are created.
+#
+# segment a_r1 segment b_r1 b_r1: 4000
+# .--------------R1--------------. everything
+# C---veth init B else: 5000
+# '- ovs |
+# '---- - - - - - VXLAN - - - - - - - '
+#
+# - pmtu_ipv{4,6}_ovs_geneve{4,6}_exception
+# Same as pmtu_ipv{4,6}_ovs_vxlan{4,6}_exception, with a GENEVE tunnel
+# instead.
+#
# - 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
@@ -147,6 +186,22 @@ tests="
pmtu_ipv6_geneve4_exception IPv6 over geneve4: PMTU exceptions 1
pmtu_ipv4_geneve6_exception IPv4 over geneve6: PMTU exceptions 1
pmtu_ipv6_geneve6_exception IPv6 over geneve6: PMTU exceptions 1
+ pmtu_ipv4_br_vxlan4_exception IPv4, bridged vxlan4: PMTU exceptions 1
+ pmtu_ipv6_br_vxlan4_exception IPv6, bridged vxlan4: PMTU exceptions 1
+ pmtu_ipv4_br_vxlan6_exception IPv4, bridged vxlan6: PMTU exceptions 1
+ pmtu_ipv6_br_vxlan6_exception IPv6, bridged vxlan6: PMTU exceptions 1
+ pmtu_ipv4_br_geneve4_exception IPv4, bridged geneve4: PMTU exceptions 1
+ pmtu_ipv6_br_geneve4_exception IPv6, bridged geneve4: PMTU exceptions 1
+ pmtu_ipv4_br_geneve6_exception IPv4, bridged geneve6: PMTU exceptions 1
+ pmtu_ipv6_br_geneve6_exception IPv6, bridged geneve6: PMTU exceptions 1
+ pmtu_ipv4_ovs_vxlan4_exception IPv4, OVS vxlan4: PMTU exceptions 1
+ pmtu_ipv6_ovs_vxlan4_exception IPv6, OVS vxlan4: PMTU exceptions 1
+ pmtu_ipv4_ovs_vxlan6_exception IPv4, OVS vxlan6: PMTU exceptions 1
+ pmtu_ipv6_ovs_vxlan6_exception IPv6, OVS vxlan6: PMTU exceptions 1
+ pmtu_ipv4_ovs_geneve4_exception IPv4, OVS geneve4: PMTU exceptions 1
+ pmtu_ipv6_ovs_geneve4_exception IPv6, OVS geneve4: PMTU exceptions 1
+ pmtu_ipv4_ovs_geneve6_exception IPv4, OVS geneve6: PMTU exceptions 1
+ pmtu_ipv6_ovs_geneve6_exception IPv6, OVS geneve6: PMTU exceptions 1
pmtu_ipv4_fou4_exception IPv4 over fou4: PMTU exceptions 1
pmtu_ipv6_fou4_exception IPv6 over fou4: PMTU exceptions 1
pmtu_ipv4_fou6_exception IPv4 over fou6: PMTU exceptions 1
@@ -173,10 +228,12 @@ tests="
NS_A="ns-A"
NS_B="ns-B"
+NS_C="ns-C"
NS_R1="ns-R1"
NS_R2="ns-R2"
ns_a="ip netns exec ${NS_A}"
ns_b="ip netns exec ${NS_B}"
+ns_c="ip netns exec ${NS_C}"
ns_r1="ip netns exec ${NS_R1}"
ns_r2="ip netns exec ${NS_R2}"
@@ -239,9 +296,11 @@ routes_nh="
veth4_a_addr="192.168.1.1"
veth4_b_addr="192.168.1.2"
+veth4_c_addr="192.168.2.10"
veth4_mask="24"
veth6_a_addr="fd00:1::a"
veth6_b_addr="fd00:1::b"
+veth6_c_addr="fd00:2::c"
veth6_mask="64"
tunnel4_a_addr="192.168.2.1"
@@ -428,7 +487,7 @@ setup_ip6ip6() {
}
setup_namespaces() {
- for n in ${NS_A} ${NS_B} ${NS_R1} ${NS_R2}; do
+ for n in ${NS_A} ${NS_B} ${NS_C} ${NS_R1} ${NS_R2}; do
ip netns add ${n} || return 1
# Disable DAD, so that we don't have to wait to use the
@@ -484,6 +543,7 @@ setup_vxlan_or_geneve() {
a_addr="${2}"
b_addr="${3}"
opts="${4}"
+ br_if_a="${5}"
if [ "${type}" = "vxlan" ]; then
opts="${opts} ttl 64 dstport 4789"
@@ -497,10 +557,16 @@ setup_vxlan_or_geneve() {
run_cmd ${ns_a} ip link add ${type}_a type ${type} id 1 ${opts_a} remote ${b_addr} ${opts} || return 1
run_cmd ${ns_b} ip link add ${type}_b type ${type} id 1 ${opts_b} remote ${a_addr} ${opts}
- run_cmd ${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev ${type}_a
- run_cmd ${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ${type}_b
+ if [ -n "${br_if_a}" ]; then
+ run_cmd ${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev ${br_if_a}
+ run_cmd ${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev ${br_if_a}
+ run_cmd ${ns_a} ip link set ${type}_a master ${br_if_a}
+ else
+ run_cmd ${ns_a} ip addr add ${tunnel4_a_addr}/${tunnel4_mask} dev ${type}_a
+ run_cmd ${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev ${type}_a
+ fi
- run_cmd ${ns_a} ip addr add ${tunnel6_a_addr}/${tunnel6_mask} dev ${type}_a
+ run_cmd ${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ${type}_b
run_cmd ${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ${type}_b
run_cmd ${ns_a} ip link set ${type}_a up
@@ -516,11 +582,27 @@ setup_vxlan4() {
}
setup_geneve6() {
- setup_vxlan_or_geneve geneve ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1
+ 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_vxlan_or_geneve vxlan ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 ""
+}
+
+setup_bridged_geneve4() {
+ setup_vxlan_or_geneve geneve ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set" "br0"
+}
+
+setup_bridged_vxlan4() {
+ setup_vxlan_or_geneve vxlan ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1 "df set" "br0"
+}
+
+setup_bridged_geneve6() {
+ setup_vxlan_or_geneve geneve ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 "" "br0"
+}
+
+setup_bridged_vxlan6() {
+ setup_vxlan_or_geneve vxlan ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1 "" "br0"
}
setup_xfrm() {
@@ -630,6 +712,80 @@ setup_routing() {
return 0
}
+setup_bridge() {
+ run_cmd ${ns_a} ip link add br0 type bridge || return 2
+ run_cmd ${ns_a} ip link set br0 up
+
+ run_cmd ${ns_c} ip link add veth_C-A type veth peer name veth_A-C
+ run_cmd ${ns_c} ip link set veth_A-C netns ns-A
+
+ run_cmd ${ns_a} ip link set veth_A-C up
+ run_cmd ${ns_c} ip link set veth_C-A up
+ run_cmd ${ns_c} ip addr add ${veth4_c_addr}/${veth4_mask} dev veth_C-A
+ run_cmd ${ns_c} ip addr add ${veth6_c_addr}/${veth6_mask} dev veth_C-A
+ run_cmd ${ns_a} ip link set veth_A-C master br0
+}
+
+setup_ovs_vxlan_or_geneve() {
+ type="${1}"
+ a_addr="${2}"
+ b_addr="${3}"
+
+ if [ "${type}" = "vxlan" ]; then
+ opts="${opts} ttl 64 dstport 4789"
+ opts_b="local ${b_addr}"
+ fi
+
+ run_cmd ovs-vsctl add-port ovs_br0 ${type}_a -- \
+ set interface ${type}_a type=${type} \
+ options:remote_ip=${b_addr} options:key=1 options:csum=true || return 1
+
+ run_cmd ${ns_b} ip link add ${type}_b type ${type} id 1 ${opts_b} remote ${a_addr} ${opts} || return 1
+
+ run_cmd ${ns_b} ip addr add ${tunnel4_b_addr}/${tunnel4_mask} dev ${type}_b
+ run_cmd ${ns_b} ip addr add ${tunnel6_b_addr}/${tunnel6_mask} dev ${type}_b
+
+ run_cmd ${ns_b} ip link set ${type}_b up
+}
+
+setup_ovs_geneve4() {
+ setup_ovs_vxlan_or_geneve geneve ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1
+}
+
+setup_ovs_vxlan4() {
+ setup_ovs_vxlan_or_geneve vxlan ${prefix4}.${a_r1}.1 ${prefix4}.${b_r1}.1
+}
+
+setup_ovs_geneve6() {
+ setup_ovs_vxlan_or_geneve geneve ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1
+}
+
+setup_ovs_vxlan6() {
+ setup_ovs_vxlan_or_geneve vxlan ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1
+}
+
+setup_ovs_bridge() {
+ run_cmd ovs-vsctl add-br ovs_br0 || return 2
+ run_cmd ip link set ovs_br0 up
+
+ run_cmd ${ns_c} ip link add veth_C-A type veth peer name veth_A-C
+ run_cmd ${ns_c} ip link set veth_A-C netns 1
+
+ run_cmd ip link set veth_A-C up
+ run_cmd ${ns_c} ip link set veth_C-A up
+ run_cmd ${ns_c} ip addr add ${veth4_c_addr}/${veth4_mask} dev veth_C-A
+ run_cmd ${ns_c} ip addr add ${veth6_c_addr}/${veth6_mask} dev veth_C-A
+ run_cmd ovs-vsctl add-port ovs_br0 veth_A-C
+
+ # Move veth_A-R1 to init
+ run_cmd ${ns_a} ip link set veth_A-R1 netns 1
+ run_cmd ip addr add ${prefix4}.${a_r1}.1/${veth4_mask} dev veth_A-R1
+ run_cmd ip addr add ${prefix6}:${a_r1}::1/${veth6_mask} dev veth_A-R1
+ run_cmd ip link set veth_A-R1 up
+ run_cmd ip route add ${prefix4}.${b_r1}.1 via ${prefix4}.${a_r1}.2
+ run_cmd ip route add ${prefix6}:${b_r1}::1 via ${prefix6}:${a_r1}::2
+}
+
setup() {
[ "$(id -u)" -ne 0 ] && echo " need to run as root" && return $ksft_skip
@@ -657,9 +813,14 @@ cleanup() {
done
tcpdump_pids=
- for n in ${NS_A} ${NS_B} ${NS_R1} ${NS_R2}; do
+ for n in ${NS_A} ${NS_B} ${NS_C} ${NS_R1} ${NS_R2}; do
ip netns del ${n} 2> /dev/null
done
+
+ ip link del veth_A-C 2>/dev/null
+ ip link del veth_A-R1 2>/dev/null
+ ovs-vsctl --if-exists del-port vxlan_a 2>/dev/null
+ ovs-vsctl --if-exists del-br ovs_br0 2>/dev/null
}
mtu() {
@@ -892,6 +1053,177 @@ test_pmtu_ipv6_geneve6_exception() {
test_pmtu_ipvX_over_vxlanY_or_geneveY_exception geneve 6 6
}
+test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception() {
+ type=${1}
+ family=${2}
+ outer_family=${3}
+ ll_mtu=4000
+
+ if [ ${outer_family} -eq 4 ]; then
+ setup namespaces routing bridge bridged_${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 bridge bridged_${type}6 || return 2
+ # IPv6 header UDP header VXLAN/GENEVE header Ethernet header
+ exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14))
+ fi
+
+ trace "${ns_a}" ${type}_a "${ns_b}" ${type}_b \
+ "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \
+ "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B \
+ "${ns_a}" br0 "${ns_a}" veth-A-C \
+ "${ns_c}" veth_C-A
+
+ 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_a}" br0 $((${ll_mtu} + 1000))
+ mtu "${ns_a}" veth_A-C $((${ll_mtu} + 1000))
+ mtu "${ns_c}" veth_C-A $((${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))
+
+ run_cmd ${ns_c} ${ping} -q -M want -i 0.1 -c 10 -s $((${ll_mtu} + 500)) ${dst} || return 1
+ run_cmd ${ns_a} ${ping} -q -M want -i 0.1 -w 1 -s $((${ll_mtu} + 500)) ${dst} || return 1
+
+ # Check that exceptions were created
+ pmtu="$(route_get_dst_pmtu_from_exception "${ns_c}" ${dst})"
+ check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on bridged ${type} interface"
+ pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})"
+ check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on locally bridged ${type} interface"
+}
+
+test_pmtu_ipv4_br_vxlan4_exception() {
+ test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 4 4
+}
+
+test_pmtu_ipv6_br_vxlan4_exception() {
+ test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 6 4
+}
+
+test_pmtu_ipv4_br_geneve4_exception() {
+ test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 4 4
+}
+
+test_pmtu_ipv6_br_geneve4_exception() {
+ test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 6 4
+}
+
+test_pmtu_ipv4_br_vxlan6_exception() {
+ test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 4 6
+}
+
+test_pmtu_ipv6_br_vxlan6_exception() {
+ test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception vxlan 6 6
+}
+
+test_pmtu_ipv4_br_geneve6_exception() {
+ test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 4 6
+}
+
+test_pmtu_ipv6_br_geneve6_exception() {
+ test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception geneve 6 6
+}
+
+test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception() {
+ type=${1}
+ family=${2}
+ outer_family=${3}
+ ll_mtu=4000
+
+ if [ ${outer_family} -eq 4 ]; then
+ setup namespaces routing ovs_bridge ovs_${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 ovs_bridge ovs_${type}6 || return 2
+ # IPv6 header UDP header VXLAN/GENEVE header Ethernet header
+ exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14))
+ fi
+
+ if [ "${type}" = "vxlan" ]; then
+ tun_a="vxlan_sys_4789"
+ elif [ "${type}" = "geneve" ]; then
+ tun_a="genev_sys_6081"
+ fi
+
+ trace "" "${tun_a}" "${ns_b}" ${type}_b \
+ "" veth_A-R1 "${ns_r1}" veth_R1-A \
+ "${ns_b}" veth_B-R1 "${ns_r1}" veth_R1-B \
+ "" ovs_br0 "" veth-A-C \
+ "${ns_c}" veth_C-A
+
+ 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 "" veth_A-R1 $((${ll_mtu} + 1000))
+ mtu "" ovs_br0 $((${ll_mtu} + 1000))
+ mtu "" veth_A-C $((${ll_mtu} + 1000))
+ mtu "${ns_c}" veth_C-A $((${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 "" ${tun_a} $((${ll_mtu} + 1000))
+ mtu "${ns_b}" ${type}_b $((${ll_mtu} + 1000))
+
+ run_cmd ${ns_c} ${ping} -q -M want -i 0.1 -c 20 -s $((${ll_mtu} + 500)) ${dst} || return 1
+
+ # Check that exceptions were created
+ pmtu="$(route_get_dst_pmtu_from_exception "${ns_c}" ${dst})"
+ check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on Open vSwitch ${type} interface"
+}
+
+test_pmtu_ipv4_ovs_vxlan4_exception() {
+ test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 4 4
+}
+
+test_pmtu_ipv6_ovs_vxlan4_exception() {
+ test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 6 4
+}
+
+test_pmtu_ipv4_ovs_geneve4_exception() {
+ test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 4 4
+}
+
+test_pmtu_ipv6_ovs_geneve4_exception() {
+ test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 6 4
+}
+
+test_pmtu_ipv4_ovs_vxlan6_exception() {
+ test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 4 6
+}
+
+test_pmtu_ipv6_ovs_vxlan6_exception() {
+ test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception vxlan 6 6
+}
+
+test_pmtu_ipv4_ovs_geneve6_exception() {
+ test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 4 6
+}
+
+test_pmtu_ipv6_ovs_geneve6_exception() {
+ test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception geneve 6 6
+}
+
test_pmtu_ipvX_over_fouY_or_gueY() {
inner_family=${1}
outer_family=${2}