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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_exceptions.sh | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_exceptions.sh')
-rwxr-xr-x | tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_exceptions.sh | 552 |
1 files changed, 552 insertions, 0 deletions
diff --git a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_exceptions.sh b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_exceptions.sh new file mode 100755 index 000000000..1d157b1bd --- /dev/null +++ b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_exceptions.sh @@ -0,0 +1,552 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Test devlink-trap L3 exceptions functionality over mlxsw. +# Check all exception traps to make sure they are triggered under the right +# conditions. + +# +---------------------------------+ +# | H1 (vrf) | +# | + $h1 | +# | | 192.0.2.1/24 | +# | | 2001:db8:1::1/64 | +# | | | +# | | default via 192.0.2.2 | +# | | default via 2001:db8:1::2 | +# +----|----------------------------+ +# | +# +----|----------------------------------------------------------------------+ +# | SW | | +# | + $rp1 | +# | 192.0.2.2/24 | +# | 2001:db8:1::2/64 | +# | | +# | 2001:db8:2::2/64 | +# | 198.51.100.2/24 | +# | + $rp2 | +# | | | +# +----|----------------------------------------------------------------------+ +# | +# +----|----------------------------+ +# | | default via 198.51.100.2 | +# | | default via 2001:db8:2::2 | +# | | | +# | | 2001:db8:2::1/64 | +# | | 198.51.100.1/24 | +# | + $h2 | +# | H2 (vrf) | +# +---------------------------------+ + +lib_dir=$(dirname $0)/../../../net/forwarding + +ALL_TESTS=" + mtu_value_is_too_small_test + ttl_value_is_too_small_test + mc_reverse_path_forwarding_test + reject_route_test + unresolved_neigh_test + ipv4_lpm_miss_test + ipv6_lpm_miss_test +" + +NUM_NETIFS=4 +source $lib_dir/lib.sh +source $lib_dir/tc_common.sh +source $lib_dir/devlink_lib.sh + +require_command $MCD +require_command $MC_CLI +table_name=selftests + +h1_create() +{ + simple_if_init $h1 192.0.2.1/24 2001:db8:1::1/64 + + ip -4 route add default vrf v$h1 nexthop via 192.0.2.2 + ip -6 route add default vrf v$h1 nexthop via 2001:db8:1::2 + + tc qdisc add dev $h1 clsact +} + +h1_destroy() +{ + tc qdisc del dev $h1 clsact + + ip -6 route del default vrf v$h1 nexthop via 2001:db8:1::2 + ip -4 route del default vrf v$h1 nexthop via 192.0.2.2 + + simple_if_fini $h1 192.0.2.1/24 2001:db8:1::1/64 +} + +h2_create() +{ + simple_if_init $h2 198.51.100.1/24 2001:db8:2::1/64 + + ip -4 route add default vrf v$h2 nexthop via 198.51.100.2 + ip -6 route add default vrf v$h2 nexthop via 2001:db8:2::2 +} + +h2_destroy() +{ + ip -6 route del default vrf v$h2 nexthop via 2001:db8:2::2 + ip -4 route del default vrf v$h2 nexthop via 198.51.100.2 + + simple_if_fini $h2 198.51.100.1/24 2001:db8:2::1/64 +} + +router_create() +{ + ip link set dev $rp1 up + ip link set dev $rp2 up + + tc qdisc add dev $rp2 clsact + + __addr_add_del $rp1 add 192.0.2.2/24 2001:db8:1::2/64 + __addr_add_del $rp2 add 198.51.100.2/24 2001:db8:2::2/64 +} + +router_destroy() +{ + __addr_add_del $rp2 del 198.51.100.2/24 2001:db8:2::2/64 + __addr_add_del $rp1 del 192.0.2.2/24 2001:db8:1::2/64 + + tc qdisc del dev $rp2 clsact + + ip link set dev $rp2 down + ip link set dev $rp1 down +} + +setup_prepare() +{ + h1=${NETIFS[p1]} + rp1=${NETIFS[p2]} + + rp2=${NETIFS[p3]} + h2=${NETIFS[p4]} + + rp1mac=$(mac_get $rp1) + + start_mcd + + vrf_prepare + forwarding_enable + + h1_create + h2_create + + router_create +} + +cleanup() +{ + pre_cleanup + + router_destroy + + h2_destroy + h1_destroy + + forwarding_restore + vrf_cleanup + + kill_mcd +} + +ping_check() +{ + ping_do $h1 198.51.100.1 + check_err $? "Packets that should not be trapped were trapped" +} + +trap_action_check() +{ + local trap_name=$1; shift + local expected_action=$1; shift + + action=$(devlink_trap_action_get $trap_name) + if [ "$action" != $expected_action ]; then + check_err 1 "Trap $trap_name has wrong action: $action" + fi +} + +mtu_value_is_too_small_test() +{ + local trap_name="mtu_value_is_too_small" + local expected_action="trap" + local mz_pid + + RET=0 + + ping_check $trap_name + trap_action_check $trap_name $expected_action + + # type - Destination Unreachable + # code - Fragmentation Needed and Don't Fragment was Set + tc filter add dev $h1 ingress protocol ip pref 1 handle 101 \ + flower skip_hw ip_proto icmp type 3 code 4 action pass + + mtu_set $rp2 1300 + + # Generate IP packets bigger than router's MTU with don't fragment + # flag on. + $MZ $h1 -t udp "sp=54321,dp=12345,df" -p 1400 -c 0 -d 1msec -b $rp1mac \ + -B 198.51.100.1 -q & + mz_pid=$! + + devlink_trap_exception_test $trap_name + + tc_check_packets_hitting "dev $h1 ingress" 101 + check_err $? "Packets were not received to h1" + + log_test "MTU value is too small" + + mtu_restore $rp2 + + kill $mz_pid && wait $mz_pid &> /dev/null + tc filter del dev $h1 ingress protocol ip pref 1 handle 101 flower +} + +__ttl_value_is_too_small_test() +{ + local ttl_val=$1; shift + local trap_name="ttl_value_is_too_small" + local expected_action="trap" + local mz_pid + + RET=0 + + ping_check $trap_name + trap_action_check $trap_name $expected_action + + # type - Time Exceeded + # code - Time to Live exceeded in Transit + tc filter add dev $h1 ingress protocol ip pref 1 handle 101 \ + flower skip_hw ip_proto icmp type 11 code 0 action pass + + # Generate IP packets with small TTL + $MZ $h1 -t udp "ttl=$ttl_val,sp=54321,dp=12345" -c 0 -d 1msec \ + -b $rp1mac -B 198.51.100.1 -q & + mz_pid=$! + + devlink_trap_exception_test $trap_name + + tc_check_packets_hitting "dev $h1 ingress" 101 + check_err $? "Packets were not received to h1" + + log_test "TTL value is too small: TTL=$ttl_val" + + kill $mz_pid && wait $mz_pid &> /dev/null + tc filter del dev $h1 ingress protocol ip pref 1 handle 101 flower +} + +ttl_value_is_too_small_test() +{ + __ttl_value_is_too_small_test 0 + __ttl_value_is_too_small_test 1 +} + +start_mcd() +{ + SMCROUTEDIR="$(mktemp -d)" + for ((i = 1; i <= $NUM_NETIFS; ++i)); do + echo "phyint ${NETIFS[p$i]} enable" >> \ + $SMCROUTEDIR/$table_name.conf + done + + $MCD -N -I $table_name -f $SMCROUTEDIR/$table_name.conf \ + -P $SMCROUTEDIR/$table_name.pid +} + +kill_mcd() +{ + pkill $MCD + rm -rf $SMCROUTEDIR +} + +__mc_reverse_path_forwarding_test() +{ + local desc=$1; shift + local src_ip=$1; shift + local dst_ip=$1; shift + local dst_mac=$1; shift + local proto=$1; shift + local flags=${1:-""}; shift + local trap_name="mc_reverse_path_forwarding" + local expected_action="trap" + local mz_pid + + RET=0 + + ping_check $trap_name + trap_action_check $trap_name $expected_action + + tc filter add dev $rp2 egress protocol $proto pref 1 handle 101 \ + flower dst_ip $dst_ip ip_proto udp action drop + + $MC_CLI -I $table_name add $rp1 $src_ip $dst_ip $rp2 + + # Generate packets to multicast address. + $MZ $h2 $flags -t udp "sp=54321,dp=12345" -c 0 -p 128 \ + -a 00:11:22:33:44:55 -b $dst_mac \ + -A $src_ip -B $dst_ip -q & + + mz_pid=$! + + devlink_trap_exception_test $trap_name + + tc_check_packets "dev $rp2 egress" 101 0 + check_err $? "Packets were not dropped" + + log_test "Multicast reverse path forwarding: $desc" + + kill $mz_pid && wait $mz_pid &> /dev/null + tc filter del dev $rp2 egress protocol $proto pref 1 handle 101 flower +} + +mc_reverse_path_forwarding_test() +{ + __mc_reverse_path_forwarding_test "IPv4" "192.0.2.1" "225.1.2.3" \ + "01:00:5e:01:02:03" "ip" + __mc_reverse_path_forwarding_test "IPv6" "2001:db8:1::1" "ff0e::3" \ + "33:33:00:00:00:03" "ipv6" "-6" +} + +__reject_route_test() +{ + local desc=$1; shift + local dst_ip=$1; shift + local proto=$1; shift + local ip_proto=$1; shift + local type=$1; shift + local code=$1; shift + local unreachable=$1; shift + local flags=${1:-""}; shift + local trap_name="reject_route" + local expected_action="trap" + local mz_pid + + RET=0 + + ping_check $trap_name + trap_action_check $trap_name $expected_action + + tc filter add dev $h1 ingress protocol $proto pref 1 handle 101 flower \ + skip_hw ip_proto $ip_proto type $type code $code action pass + + ip route add unreachable $unreachable + + # Generate pacekts to h2. The destination IP is unreachable. + $MZ $flags $h1 -t udp "sp=54321,dp=12345" -c 0 -d 1msec -b $rp1mac \ + -B $dst_ip -q & + mz_pid=$! + + devlink_trap_exception_test $trap_name + + tc_check_packets_hitting "dev $h1 ingress" 101 + check_err $? "ICMP packet was not received to h1" + + log_test "Reject route: $desc" + + kill $mz_pid && wait $mz_pid &> /dev/null + ip route del unreachable $unreachable + tc filter del dev $h1 ingress protocol $proto pref 1 handle 101 flower +} + +reject_route_test() +{ + # type - Destination Unreachable + # code - Host Unreachable + __reject_route_test "IPv4" 198.51.100.1 "ip" "icmp" 3 1 \ + "198.51.100.0/26" + # type - Destination Unreachable + # code - No Route + __reject_route_test "IPv6" 2001:db8:2::1 "ipv6" "icmpv6" 1 0 \ + "2001:db8:2::0/66" "-6" +} + +__host_miss_test() +{ + local desc=$1; shift + local dip=$1; shift + local trap_name="unresolved_neigh" + local expected_action="trap" + local mz_pid + + RET=0 + + ping_check $trap_name + trap_action_check $trap_name $expected_action + + ip neigh flush dev $rp2 + + t0_packets=$(devlink_trap_rx_packets_get $trap_name) + + # Generate packets to h2 (will incur a unresolved neighbor). + # The ping should pass and devlink counters should be increased. + ping_do $h1 $dip + check_err $? "ping failed: $desc" + + t1_packets=$(devlink_trap_rx_packets_get $trap_name) + + if [[ $t0_packets -eq $t1_packets ]]; then + check_err 1 "Trap counter did not increase" + fi + + log_test "Unresolved neigh: host miss: $desc" +} + +__invalid_nexthop_test() +{ + local desc=$1; shift + local dip=$1; shift + local extra_add=$1; shift + local subnet=$1; shift + local via_add=$1; shift + local trap_name="unresolved_neigh" + local expected_action="trap" + local mz_pid + + RET=0 + + ping_check $trap_name + trap_action_check $trap_name $expected_action + + ip address add $extra_add/$subnet dev $h2 + + # Check that correct route does not trigger unresolved_neigh + ip $flags route add $dip via $extra_add dev $rp2 + + # Generate packets in order to discover all neighbours. + # Without it, counters of unresolved_neigh will be increased + # during neighbours discovery and the check below will fail + # for a wrong reason + ping_do $h1 $dip + + t0_packets=$(devlink_trap_rx_packets_get $trap_name) + ping_do $h1 $dip + t1_packets=$(devlink_trap_rx_packets_get $trap_name) + + if [[ $t0_packets -ne $t1_packets ]]; then + check_err 1 "Trap counter increased when it should not" + fi + + ip $flags route del $dip via $extra_add dev $rp2 + + # Check that route to nexthop that does not exist trigger + # unresolved_neigh + ip $flags route add $dip via $via_add dev $h2 + + t0_packets=$(devlink_trap_rx_packets_get $trap_name) + ping_do $h1 $dip + t1_packets=$(devlink_trap_rx_packets_get $trap_name) + + if [[ $t0_packets -eq $t1_packets ]]; then + check_err 1 "Trap counter did not increase" + fi + + ip $flags route del $dip via $via_add dev $h2 + ip address del $extra_add/$subnet dev $h2 + log_test "Unresolved neigh: nexthop does not exist: $desc" +} + +unresolved_neigh_test() +{ + __host_miss_test "IPv4" 198.51.100.1 + __host_miss_test "IPv6" 2001:db8:2::1 + __invalid_nexthop_test "IPv4" 198.51.100.1 198.51.100.3 24 198.51.100.4 + __invalid_nexthop_test "IPv6" 2001:db8:2::1 2001:db8:2::3 64 \ + 2001:db8:2::4 +} + +vrf_without_routes_create() +{ + # VRF creating makes the links to be down and then up again. + # By default, IPv6 address is not saved after link becomes down. + # Save IPv6 address using sysctl configuration. + sysctl_set net.ipv6.conf.$rp1.keep_addr_on_down 1 + sysctl_set net.ipv6.conf.$rp2.keep_addr_on_down 1 + + ip link add dev vrf1 type vrf table 101 + ip link set dev $rp1 master vrf1 + ip link set dev $rp2 master vrf1 + ip link set dev vrf1 up + + # Wait for rp1 and rp2 to be up + setup_wait +} + +vrf_without_routes_destroy() +{ + ip link set dev $rp1 nomaster + ip link set dev $rp2 nomaster + ip link del dev vrf1 + + sysctl_restore net.ipv6.conf.$rp2.keep_addr_on_down + sysctl_restore net.ipv6.conf.$rp1.keep_addr_on_down + + # Wait for interfaces to be up + setup_wait +} + +ipv4_lpm_miss_test() +{ + local trap_name="ipv4_lpm_miss" + local expected_action="trap" + local mz_pid + + RET=0 + + ping_check $trap_name + trap_action_check $trap_name $expected_action + + # Create a VRF without a default route + vrf_without_routes_create + + # Generate packets through a VRF without a matching route. + $MZ $h1 -t udp "sp=54321,dp=12345" -c 0 -d 1msec -b $rp1mac \ + -B 203.0.113.1 -q & + mz_pid=$! + + devlink_trap_exception_test $trap_name + + log_test "LPM miss: IPv4" + + kill $mz_pid && wait $mz_pid &> /dev/null + vrf_without_routes_destroy +} + +ipv6_lpm_miss_test() +{ + local trap_name="ipv6_lpm_miss" + local expected_action="trap" + local mz_pid + + RET=0 + + ping_check $trap_name + trap_action_check $trap_name $expected_action + + # Create a VRF without a default route + vrf_without_routes_create + + # Generate packets through a VRF without a matching route. + $MZ -6 $h1 -t udp "sp=54321,dp=12345" -c 0 -d 1msec -b $rp1mac \ + -B 2001:db8::1 -q & + mz_pid=$! + + devlink_trap_exception_test $trap_name + + log_test "LPM miss: IPv6" + + kill $mz_pid && wait $mz_pid &> /dev/null + vrf_without_routes_destroy +} + +trap cleanup EXIT + +setup_prepare +setup_wait + +tests_run + +exit $EXIT_STATUS |