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-rwxr-xr-xtools/testing/selftests/net/pmtu.sh270
1 files changed, 221 insertions, 49 deletions
diff --git a/tools/testing/selftests/net/pmtu.sh b/tools/testing/selftests/net/pmtu.sh
index cfc84958025a..88e914c4eef9 100755
--- a/tools/testing/selftests/net/pmtu.sh
+++ b/tools/testing/selftests/net/pmtu.sh
@@ -197,9 +197,14 @@
#
# - pmtu_ipv6_route_change
# Same as above but with IPv6
+#
+# - pmtu_ipv4_mp_exceptions
+# Use the same topology as in pmtu_ipv4, but add routeable addresses
+# on host A and B on lo reachable via both routers. Host A and B
+# addresses have multipath routes to each other, b_r1 mtu = 1500.
+# Check that PMTU exceptions are created for both paths.
source lib.sh
-source net_helper.sh
PAUSE_ON_FAIL=no
VERBOSE=0
@@ -266,7 +271,8 @@ tests="
list_flush_ipv4_exception ipv4: list and flush cached exceptions 1
list_flush_ipv6_exception ipv6: list and flush cached exceptions 1
pmtu_ipv4_route_change ipv4: PMTU exception w/route replace 1
- pmtu_ipv6_route_change ipv6: PMTU exception w/route replace 1"
+ pmtu_ipv6_route_change ipv6: PMTU exception w/route replace 1
+ pmtu_ipv4_mp_exceptions ipv4: PMTU multipath nh exceptions 1"
# Addressing and routing for tests with routers: four network segments, with
# index SEGMENT between 1 and 4, a common prefix (PREFIX4 or PREFIX6) and an
@@ -343,6 +349,9 @@ tunnel6_a_addr="fd00:2::a"
tunnel6_b_addr="fd00:2::b"
tunnel6_mask="64"
+host4_a_addr="192.168.99.99"
+host4_b_addr="192.168.88.88"
+
dummy6_0_prefix="fc00:1000::"
dummy6_1_prefix="fc00:1001::"
dummy6_mask="64"
@@ -681,13 +690,7 @@ setup_xfrm() {
}
setup_nettest_xfrm() {
- if ! which nettest >/dev/null; then
- PATH=$PWD:$PATH
- if ! which nettest >/dev/null; then
- echo "'nettest' command not found; skipping tests"
- return 1
- fi
- fi
+ check_gen_prog "nettest"
[ ${1} -eq 6 ] && proto="-6" || proto=""
port=${2}
@@ -842,25 +845,97 @@ setup_bridge() {
run_cmd ${ns_a} ip link set veth_A-C master br0
}
+setup_ovs_via_internal_utility() {
+ type="${1}"
+ a_addr="${2}"
+ b_addr="${3}"
+ dport="${4}"
+
+ run_cmd python3 ./openvswitch/ovs-dpctl.py add-if ovs_br0 ${type}_a -t ${type} || return 1
+
+ ports=$(python3 ./openvswitch/ovs-dpctl.py show)
+ br0_port=$(echo "$ports" | grep -E "\sovs_br0" | sed -e 's@port @@' | cut -d: -f1 | xargs)
+ type_a_port=$(echo "$ports" | grep ${type}_a | sed -e 's@port @@' | cut -d: -f1 | xargs)
+ veth_a_port=$(echo "$ports" | grep veth_A | sed -e 's@port @@' | cut -d: -f1 | xargs)
+
+ v4_a_tun="${prefix4}.${a_r1}.1"
+ v4_b_tun="${prefix4}.${b_r1}.1"
+
+ v6_a_tun="${prefix6}:${a_r1}::1"
+ v6_b_tun="${prefix6}:${b_r1}::1"
+
+ if [ "${v4_a_tun}" = "${a_addr}" ]; then
+ run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \
+ "recirc_id(0),in_port(${veth_a_port}),eth(),eth_type(0x0800),ipv4()" \
+ "set(tunnel(tun_id=1,dst=${v4_b_tun},ttl=64,tp_dst=${dport},flags(df|csum))),${type_a_port}"
+ run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \
+ "recirc_id(0),in_port(${veth_a_port}),eth(),eth_type(0x86dd),ipv6()" \
+ "set(tunnel(tun_id=1,dst=${v4_b_tun},ttl=64,tp_dst=${dport},flags(df|csum))),${type_a_port}"
+ run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \
+ "recirc_id(0),tunnel(tun_id=1,src=${v4_b_tun},dst=${v4_a_tun}),in_port(${type_a_port}),eth(),eth_type(0x0800),ipv4()" \
+ "${veth_a_port}"
+ run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \
+ "recirc_id(0),tunnel(tun_id=1,src=${v4_b_tun},dst=${v4_a_tun}),in_port(${type_a_port}),eth(),eth_type(0x86dd),ipv6()" \
+ "${veth_a_port}"
+ run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \
+ "recirc_id(0),tunnel(tun_id=1,src=${v4_b_tun},dst=${v4_a_tun}),in_port(${type_a_port}),eth(),eth_type(0x0806),arp()" \
+ "${veth_a_port}"
+ run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \
+ "recirc_id(0),in_port(${veth_a_port}),eth(),eth_type(0x0806),arp(sip=${veth4_c_addr},tip=${tunnel4_b_addr})" \
+ "set(tunnel(tun_id=1,dst=${v4_b_tun},ttl=64,tp_dst=${dport},flags(df|csum))),${type_a_port}"
+ else
+ run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \
+ "recirc_id(0),in_port(${veth_a_port}),eth(),eth_type(0x0800),ipv4()" \
+ "set(tunnel(tun_id=1,ipv6_dst=${v6_b_tun},ttl=64,tp_dst=${dport},flags(df|csum))),${type_a_port}"
+ run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \
+ "recirc_id(0),in_port(${veth_a_port}),eth(),eth_type(0x86dd),ipv6()" \
+ "set(tunnel(tun_id=1,ipv6_dst=${v6_b_tun},ttl=64,tp_dst=${dport},flags(df|csum))),${type_a_port}"
+ run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \
+ "recirc_id(0),tunnel(tun_id=1,ipv6_src=${v6_b_tun},ipv6_dst=${v6_a_tun}),in_port(${type_a_port}),eth(),eth_type(0x0800),ipv4()" \
+ "${veth_a_port}"
+ run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \
+ "recirc_id(0),tunnel(tun_id=1,ipv6_src=${v6_b_tun},ipv6_dst=${v6_a_tun}),in_port(${type_a_port}),eth(),eth_type(0x86dd),ipv6()" \
+ "${veth_a_port}"
+ run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \
+ "recirc_id(0),tunnel(tun_id=1,ipv6_src=${v6_b_tun},ipv6_dst=${v6_a_tun}),in_port(${type_a_port}),eth(),eth_type(0x0806),arp()" \
+ "${veth_a_port}"
+ run_cmd python3 ./openvswitch/ovs-dpctl.py add-flow ovs_br0 \
+ "recirc_id(0),in_port(${veth_a_port}),eth(),eth_type(0x0806),arp(sip=${veth4_c_addr},tip=${tunnel4_b_addr})" \
+ "set(tunnel(tun_id=1,ipv6_dst=${v6_b_tun},ttl=64,tp_dst=${dport},flags(df|csum))),${type_a_port}"
+ fi
+}
+
+setup_ovs_via_vswitchd() {
+ type="${1}"
+ b_addr="${2}"
+
+ run_cmd ovs-vsctl add-port ovs_br0 ${type}_a -- \
+ set interface ${type}_a type=${type} \
+ options:remote_ip=${b_addr} options:key=1 options:csum=true || return 1
+}
+
setup_ovs_vxlan_or_geneve() {
type="${1}"
a_addr="${2}"
b_addr="${3}"
+ dport="6081"
if [ "${type}" = "vxlan" ]; then
+ dport="4789"
opts="${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=${b_addr} options:key=1 options:csum=true || return 1
+ setup_ovs_via_internal_utility "${type}" "${a_addr}" "${b_addr}" \
+ "${dport}" || \
+ setup_ovs_via_vswitchd "${type}" "${b_addr}" || 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 ip link set ${type}_a up
run_cmd ${ns_b} ip link set ${type}_b up
}
@@ -880,8 +955,24 @@ setup_ovs_vxlan6() {
setup_ovs_vxlan_or_geneve vxlan ${prefix6}:${a_r1}::1 ${prefix6}:${b_r1}::1
}
+setup_ovs_br_internal() {
+ run_cmd python3 ./openvswitch/ovs-dpctl.py add-dp ovs_br0 || \
+ return 1
+}
+
+setup_ovs_br_vswitchd() {
+ run_cmd ovs-vsctl add-br ovs_br0 || return 1
+}
+
+setup_ovs_add_if() {
+ ifname="${1}"
+ run_cmd python3 ./openvswitch/ovs-dpctl.py add-if ovs_br0 \
+ "${ifname}" || \
+ run_cmd ovs-vsctl add-port ovs_br0 "${ifname}"
+}
+
setup_ovs_bridge() {
- run_cmd ovs-vsctl add-br ovs_br0 || return $ksft_skip
+ setup_ovs_br_internal || setup_ovs_br_vswitchd || return $ksft_skip
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
@@ -891,7 +982,7 @@ setup_ovs_bridge() {
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
+ setup_ovs_add_if veth_A-C
# Move veth_A-R1 to init
run_cmd ${ns_a} ip link set veth_A-R1 netns 1
@@ -902,6 +993,52 @@ setup_ovs_bridge() {
run_cmd ip route add ${prefix6}:${b_r1}::1 via ${prefix6}:${a_r1}::2
}
+setup_multipath_new() {
+ # Set up host A with multipath routes to host B host4_b_addr
+ run_cmd ${ns_a} ip addr add ${host4_a_addr} dev lo
+ run_cmd ${ns_a} ip nexthop add id 401 via ${prefix4}.${a_r1}.2 dev veth_A-R1
+ run_cmd ${ns_a} ip nexthop add id 402 via ${prefix4}.${a_r2}.2 dev veth_A-R2
+ run_cmd ${ns_a} ip nexthop add id 403 group 401/402
+ run_cmd ${ns_a} ip route add ${host4_b_addr} src ${host4_a_addr} nhid 403
+
+ # Set up host B with multipath routes to host A host4_a_addr
+ run_cmd ${ns_b} ip addr add ${host4_b_addr} dev lo
+ run_cmd ${ns_b} ip nexthop add id 401 via ${prefix4}.${b_r1}.2 dev veth_B-R1
+ run_cmd ${ns_b} ip nexthop add id 402 via ${prefix4}.${b_r2}.2 dev veth_B-R2
+ run_cmd ${ns_b} ip nexthop add id 403 group 401/402
+ run_cmd ${ns_b} ip route add ${host4_a_addr} src ${host4_b_addr} nhid 403
+}
+
+setup_multipath_old() {
+ # Set up host A with multipath routes to host B host4_b_addr
+ run_cmd ${ns_a} ip addr add ${host4_a_addr} dev lo
+ run_cmd ${ns_a} ip route add ${host4_b_addr} \
+ src ${host4_a_addr} \
+ nexthop via ${prefix4}.${a_r1}.2 weight 1 \
+ nexthop via ${prefix4}.${a_r2}.2 weight 1
+
+ # Set up host B with multipath routes to host A host4_a_addr
+ run_cmd ${ns_b} ip addr add ${host4_b_addr} dev lo
+ run_cmd ${ns_b} ip route add ${host4_a_addr} \
+ src ${host4_b_addr} \
+ nexthop via ${prefix4}.${b_r1}.2 weight 1 \
+ nexthop via ${prefix4}.${b_r2}.2 weight 1
+}
+
+setup_multipath() {
+ if [ "$USE_NH" = "yes" ]; then
+ setup_multipath_new
+ else
+ setup_multipath_old
+ fi
+
+ # Set up routers with routes to dummies
+ run_cmd ${ns_r1} ip route add ${host4_a_addr} via ${prefix4}.${a_r1}.1
+ run_cmd ${ns_r2} ip route add ${host4_a_addr} via ${prefix4}.${a_r2}.1
+ run_cmd ${ns_r1} ip route add ${host4_b_addr} via ${prefix4}.${b_r1}.1
+ run_cmd ${ns_r2} ip route add ${host4_b_addr} via ${prefix4}.${b_r2}.1
+}
+
setup() {
[ "$(id -u)" -ne 0 ] && echo " need to run as root" && return $ksft_skip
@@ -922,6 +1059,18 @@ trace() {
sleep 1
}
+cleanup_del_ovs_internal() {
+ # squelch the output of the del-if commands since it can be wordy
+ python3 ./openvswitch/ovs-dpctl.py del-if ovs_br0 -d true vxlan_a >/dev/null 2>&1
+ python3 ./openvswitch/ovs-dpctl.py del-if ovs_br0 -d true geneve_a >/dev/null 2>&1
+ python3 ./openvswitch/ovs-dpctl.py del-dp ovs_br0 >/dev/null 2>&1
+}
+
+cleanup_del_ovs_vswitchd() {
+ ovs-vsctl --if-exists del-port vxlan_a 2>/dev/null
+ ovs-vsctl --if-exists del-br ovs_br0 2>/dev/null
+}
+
cleanup() {
for pid in ${tcpdump_pids}; do
kill ${pid}
@@ -940,10 +1089,10 @@ cleanup() {
cleanup_all_ns
- ip link del veth_A-C 2>/dev/null
- ip link del veth_A-R1 2>/dev/null
- ovs-vsctl --if-exists del-port vxlan_a 2>/dev/null
- ovs-vsctl --if-exists del-br ovs_br0 2>/dev/null
+ ip link del veth_A-C 2>/dev/null
+ ip link del veth_A-R1 2>/dev/null
+ cleanup_del_ovs_internal
+ cleanup_del_ovs_vswitchd
rm -f "$tmpoutfile"
}
@@ -982,23 +1131,15 @@ link_get_mtu() {
}
route_get_dst_exception() {
- ns_cmd="${1}"
- dst="${2}"
- dsfield="${3}"
-
- if [ -z "${dsfield}" ]; then
- dsfield=0
- fi
+ ns_cmd="${1}"; shift
- ${ns_cmd} ip route get "${dst}" dsfield "${dsfield}"
+ ${ns_cmd} ip route get "$@"
}
route_get_dst_pmtu_from_exception() {
- ns_cmd="${1}"
- dst="${2}"
- dsfield="${3}"
+ ns_cmd="${1}"; shift
- mtu_parse "$(route_get_dst_exception "${ns_cmd}" "${dst}" "${dsfield}")"
+ mtu_parse "$(route_get_dst_exception "${ns_cmd}" "$@")"
}
check_pmtu_value() {
@@ -1141,10 +1282,10 @@ test_pmtu_ipv4_dscp_icmp_exception() {
run_cmd "${ns_a}" ping -q -M want -Q "${dsfield}" -c 1 -w 1 -s "${len}" "${dst2}"
# Check that exceptions have been created with the correct PMTU
- pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst1}" "${policy_mark}")"
+ pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst1}" dsfield "${policy_mark}")"
check_pmtu_value "1400" "${pmtu_1}" "exceeding MTU" || return 1
- pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst2}" "${policy_mark}")"
+ pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst2}" dsfield "${policy_mark}")"
check_pmtu_value "1500" "${pmtu_2}" "exceeding MTU" || return 1
}
@@ -1191,9 +1332,9 @@ test_pmtu_ipv4_dscp_udp_exception() {
UDP:"${dst2}":50000,tos="${dsfield}"
# Check that exceptions have been created with the correct PMTU
- pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst1}" "${policy_mark}")"
+ pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst1}" dsfield "${policy_mark}")"
check_pmtu_value "1400" "${pmtu_1}" "exceeding MTU" || return 1
- pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst2}" "${policy_mark}")"
+ pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst2}" dsfield "${policy_mark}")"
check_pmtu_value "1500" "${pmtu_2}" "exceeding MTU" || return 1
}
@@ -1347,7 +1488,7 @@ test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception() {
size=$(du -sb $tmpoutfile)
size=${size%%/tmp/*}
- [ $size -ne 1048576 ] && err "File size $size mismatches exepcted value in locally bridged vxlan test" && return 1
+ [ $size -ne 1048576 ] && err "File size $size mismatches expected value in locally bridged vxlan test" && return 1
done
rm -f "$tmpoutfile"
@@ -1397,6 +1538,12 @@ test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception() {
outer_family=${3}
ll_mtu=4000
+ if [ "${type}" = "vxlan" ]; then
+ tun_a="vxlan_sys_4789"
+ elif [ "${type}" = "geneve" ]; then
+ tun_a="genev_sys_6081"
+ fi
+
if [ ${outer_family} -eq 4 ]; then
setup namespaces routing ovs_bridge ovs_${type}4 || return $ksft_skip
# IPv4 header UDP header VXLAN/GENEVE header Ethernet header
@@ -1407,17 +1554,11 @@ test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception() {
exp_mtu=$((${ll_mtu} - 40 - 8 - 8 - 14))
fi
- if [ "${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
+ trace "" ${type}_a "${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 \
+ "${ns_c}" veth_C-A "" "${tun_a}"
if [ ${family} -eq 4 ]; then
ping=ping
@@ -1436,8 +1577,9 @@ test_pmtu_ipvX_over_ovs_vxlanY_or_geneveY_exception() {
mtu "${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))
+ mtu "" ${tun_a} $((${ll_mtu} + 1000)) 2>/dev/null || \
+ mtu "" ${type}_a $((${ll_mtu} + 1000)) 2>/dev/null
+ 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)) ${dst} || return 1
@@ -1961,7 +2103,7 @@ check_running() {
pid=${1}
cmd=${2}
- [ "$(cat /proc/${pid}/cmdline 2>/dev/null | tr -d '\0')" = "{cmd}" ]
+ [ "$(cat /proc/${pid}/cmdline 2>/dev/null | tr -d '\0')" = "${cmd}" ]
}
test_cleanup_vxlanX_exception() {
@@ -2234,6 +2376,36 @@ test_pmtu_ipv6_route_change() {
test_pmtu_ipvX_route_change 6
}
+test_pmtu_ipv4_mp_exceptions() {
+ setup namespaces routing multipath || return $ksft_skip
+
+ trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \
+ "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \
+ "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \
+ "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2
+
+ # Set up initial MTU values
+ mtu "${ns_a}" veth_A-R1 2000
+ mtu "${ns_r1}" veth_R1-A 2000
+ mtu "${ns_r1}" veth_R1-B 1500
+ mtu "${ns_b}" veth_B-R1 1500
+
+ mtu "${ns_a}" veth_A-R2 2000
+ mtu "${ns_r2}" veth_R2-A 2000
+ mtu "${ns_r2}" veth_R2-B 1500
+ mtu "${ns_b}" veth_B-R2 1500
+
+ # Ping and expect two nexthop exceptions for two routes
+ run_cmd ${ns_a} ping -q -M want -i 0.1 -c 1 -s 1800 "${host4_b_addr}"
+
+ # Check that exceptions have been created with the correct PMTU
+ pmtu_a_R1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${host4_b_addr}" oif veth_A-R1)"
+ pmtu_a_R2="$(route_get_dst_pmtu_from_exception "${ns_a}" "${host4_b_addr}" oif veth_A-R2)"
+
+ check_pmtu_value "1500" "${pmtu_a_R1}" "exceeding MTU (veth_A-R1)" || return 1
+ check_pmtu_value "1500" "${pmtu_a_R2}" "exceeding MTU (veth_A-R2)" || return 1
+}
+
usage() {
echo
echo "$0 [OPTIONS] [TEST]..."
generated by cgit (git 2.34.1) at 2025-07-23 10:55:35 +0000