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#!/bin/bash # SPDX-License-Identifier: GPL-2.0 # # Test unicast FIB offload indication. lib_dir=$(dirname $0)/../../../net/forwarding ALL_TESTS=" ipv6_route_add ipv6_route_replace ipv6_route_nexthop_group_share ipv6_route_rate " NUM_NETIFS=4 source $lib_dir/lib.sh source $lib_dir/devlink_lib.sh tor1_create() { simple_if_init $tor1_p1 2001:db8:1::2/128 2001:db8:1::3/128 } tor1_destroy() { simple_if_fini $tor1_p1 2001:db8:1::2/128 2001:db8:1::3/128 } tor2_create() { simple_if_init $tor2_p1 2001:db8:2::2/128 2001:db8:2::3/128 } tor2_destroy() { simple_if_fini $tor2_p1 2001:db8:2::2/128 2001:db8:2::3/128 } spine_create() { ip link set dev $spine_p1 up ip link set dev $spine_p2 up __addr_add_del $spine_p1 add 2001:db8:1::1/64 __addr_add_del $spine_p2 add 2001:db8:2::1/64 } spine_destroy() { __addr_add_del $spine_p2 del 2001:db8:2::1/64 __addr_add_del $spine_p1 del 2001:db8:1::1/64 ip link set dev $spine_p2 down ip link set dev $spine_p1 down } ipv6_offload_check() { local pfx="$1"; shift local expected_num=$1; shift local num # Try to avoid races with route offload sleep .1 num=$(ip -6 route show match ${pfx} \| grep "offload" \| wc -l) if [ $num -eq $expected_num ]; then return 0 fi return 1 } ipv6_route_add_prefix() { RET=0 # Add a prefix route and check that it is offloaded. ip -6 route add 2001:db8:3::/64 dev $spine_p1 metric 100 ipv6_offload_check "2001:db8:3::/64 dev $spine_p1 metric 100" 1 check_err $? "prefix route not offloaded" # Append an identical prefix route with an higher metric and check that # offload indication did not change. ip -6 route append 2001:db8:3::/64 dev $spine_p1 metric 200 ipv6_offload_check "2001:db8:3::/64 dev $spine_p1 metric 100" 1 check_err $? "lowest metric not offloaded after append" ipv6_offload_check "2001:db8:3::/64 dev $spine_p1 metric 200" 0 check_err $? "highest metric offloaded when should not" # Prepend an identical prefix route with lower metric and check that # it is offloaded and the others are not. ip -6 route append 2001:db8:3::/64 dev $spine_p1 metric 10 ipv6_offload_check "2001:db8:3::/64 dev $spine_p1 metric 10" 1 check_err $? "lowest metric not offloaded after prepend" ipv6_offload_check "2001:db8:3::/64 dev $spine_p1 metric 100" 0 check_err $? "mid metric offloaded when should not" ipv6_offload_check "2001:db8:3::/64 dev $spine_p1 metric 200" 0 check_err $? "highest metric offloaded when should not" # Delete the routes and add the same route with a different nexthop # device. Check that it is offloaded. ip -6 route flush 2001:db8:3::/64 dev $spine_p1 ip -6 route add 2001:db8:3::/64 dev $spine_p2 ipv6_offload_check "2001:db8:3::/64 dev $spine_p2" 1 log_test "IPv6 prefix route add" ip -6 route flush 2001:db8:3::/64 } ipv6_route_add_mpath() { RET=0 # Add a multipath route and check that it is offloaded. ip -6 route add 2001:db8:3::/64 metric 100 \ nexthop via 2001:db8:1::2 dev $spine_p1 \ nexthop via 2001:db8:2::2 dev $spine_p2 ipv6_offload_check "2001:db8:3::/64 metric 100" 2 check_err $? "multipath route not offloaded when should" # Append another nexthop and check that it is offloaded as well. ip -6 route append 2001:db8:3::/64 metric 100 \ nexthop via 2001:db8:1::3 dev $spine_p1 ipv6_offload_check "2001:db8:3::/64 metric 100" 3 check_err $? "appended nexthop not offloaded when should" # Mimic route replace by removing the route and adding it back with # only two nexthops. ip -6 route del 2001:db8:3::/64 ip -6 route add 2001:db8:3::/64 metric 100 \ nexthop via 2001:db8:1::2 dev $spine_p1 \ nexthop via 2001:db8:2::2 dev $spine_p2 ipv6_offload_check "2001:db8:3::/64 metric 100" 2 check_err $? "multipath route not offloaded after delete & add" # Append a nexthop with an higher metric and check that the offload # indication did not change. ip -6 route append 2001:db8:3::/64 metric 200 \ nexthop via 2001:db8:1::3 dev $spine_p1 ipv6_offload_check "2001:db8:3::/64 metric 100" 2 check_err $? "lowest metric not offloaded after append" ipv6_offload_check "2001:db8:3::/64 metric 200" 0 check_err $? "highest metric offloaded when should not" # Prepend a nexthop with a lower metric and check that it is offloaded # and the others are not. ip -6 route append 2001:db8:3::/64 metric 10 \ nexthop via 2001:db8:1::3 dev $spine_p1 ipv6_offload_check "2001:db8:3::/64 metric 10" 1 check_err $? "lowest metric not offloaded after prepend" ipv6_offload_check "2001:db8:3::/64 metric 100" 0 check_err $? "mid metric offloaded when should not" ipv6_offload_check "2001:db8:3::/64 metric 200" 0 check_err $? "highest metric offloaded when should not" log_test "IPv6 multipath route add" ip -6 route flush 2001:db8:3::/64 } ipv6_route_add() { ipv6_route_add_prefix ipv6_route_add_mpath } ipv6_route_replace() { RET=0 # Replace prefix route with prefix route. ip -6 route add 2001:db8:3::/64 metric 100 dev $spine_p1 ipv6_offload_check "2001:db8:3::/64 metric 100" 1 check_err $? "prefix route not offloaded when should" ip -6 route replace 2001:db8:3::/64 metric 100 dev $spine_p2 ipv6_offload_check "2001:db8:3::/64 metric 100" 1 check_err $? "prefix route not offloaded after replace" # Replace prefix route with multipath route. ip -6 route replace 2001:db8:3::/64 metric 100 \ nexthop via 2001:db8:1::2 dev $spine_p1 \ nexthop via 2001:db8:2::2 dev $spine_p2 ipv6_offload_check "2001:db8:3::/64 metric 100" 2 check_err $? "multipath route not offloaded after replace" # Replace multipath route with prefix route. A prefix route cannot # replace a multipath route, so it is appended. ip -6 route replace 2001:db8:3::/64 metric 100 dev $spine_p1 ipv6_offload_check "2001:db8:3::/64 metric 100 dev $spine_p1" 0 check_err $? "prefix route offloaded after 'replacing' multipath route" ipv6_offload_check "2001:db8:3::/64 metric 100" 2 check_err $? "multipath route not offloaded after being 'replaced' by prefix route" # Replace multipath route with multipath route. ip -6 route replace 2001:db8:3::/64 metric 100 \ nexthop via 2001:db8:1::3 dev $spine_p1 \ nexthop via 2001:db8:2::3 dev $spine_p2 ipv6_offload_check "2001:db8:3::/64 metric 100" 2 check_err $? "multipath route not offloaded after replacing multipath route" # Replace a non-existing multipath route with a multipath route and # check that it is appended and not offloaded. ip -6 route replace 2001:db8:3::/64 metric 200 \ nexthop via 2001:db8:1::3 dev $spine_p1 \ nexthop via 2001:db8:2::3 dev $spine_p2 ipv6_offload_check "2001:db8:3::/64 metric 100" 2 check_err $? "multipath route not offloaded after non-existing route was 'replaced'" ipv6_offload_check "2001:db8:3::/64 metric 200" 0 check_err $? "multipath route offloaded after 'replacing' non-existing route" log_test "IPv6 route replace" ip -6 route flush 2001:db8:3::/64 } ipv6_route_nexthop_group_share() { RET=0 # The driver consolidates identical nexthop groups in order to reduce # the resource usage in its adjacency table. Check that the deletion # of one multipath route using the group does not affect the other. ip -6 route add 2001:db8:3::/64 \ nexthop via 2001:db8:1::2 dev $spine_p1 \ nexthop via 2001:db8:2::2 dev $spine_p2 ip -6 route add 2001:db8:4::/64 \ nexthop via 2001:db8:1::2 dev $spine_p1 \ nexthop via 2001:db8:2::2 dev $spine_p2 ipv6_offload_check "2001:db8:3::/64" 2 check_err $? "multipath route not offloaded when should" ipv6_offload_check "2001:db8:4::/64" 2 check_err $? "multipath route not offloaded when should" ip -6 route del 2001:db8:3::/64 ipv6_offload_check "2001:db8:4::/64" 2 check_err $? "multipath route not offloaded after deletion of route sharing the nexthop group" # Check that after unsharing a nexthop group the routes are still # marked as offloaded. ip -6 route add 2001:db8:3::/64 \ nexthop via 2001:db8:1::2 dev $spine_p1 \ nexthop via 2001:db8:2::2 dev $spine_p2 ip -6 route del 2001:db8:4::/64 \ nexthop via 2001:db8:1::2 dev $spine_p1 ipv6_offload_check "2001:db8:4::/64" 1 check_err $? "singlepath route not offloaded after unsharing the nexthop group" ipv6_offload_check "2001:db8:3::/64" 2 check_err $? "multipath route not offloaded after unsharing the nexthop group" log_test "IPv6 nexthop group sharing" ip -6 route flush 2001:db8:3::/64 ip -6 route flush 2001:db8:4::/64 } ipv6_route_rate() { local batch_dir=$(mktemp -d) local num_rts=$((40 * 1024)) local num_nhs=16 local total local start local diff local end local nhs local i RET=0 # Prepare 40K /64 multipath routes with 16 nexthops each and check how # long it takes to add them. A limit of 60 seconds is set. It is much # higher than insertion should take and meant to flag a serious # regression. total=$((nums_nhs * num_rts)) for i in $(seq 1 $num_nhs); do ip -6 address add 2001:db8:1::10:$i/128 dev $tor1_p1 nexthops+=" nexthop via 2001:db8:1::10:$i dev $spine_p1" done for i in $(seq 1 $num_rts); do echo "route add 2001:db8:8:$(printf "%x" $i)::/64$nexthops" \ >> $batch_dir/add.batch echo "route del 2001:db8:8:$(printf "%x" $i)::/64$nexthops" \ >> $batch_dir/del.batch done start=$(date +%s.%N) ip -batch $batch_dir/add.batch count=$(ip -6 route show \| grep offload \| wc -l) while [ $count -lt $total ]; do sleep .01 count=$(ip -6 route show \| grep offload \| wc -l) done end=$(date +%s.%N) diff=$(echo "$end - $start" \| bc -l) test "$(echo "$diff > 60" \| bc -l)" -eq 0 check_err $? "route insertion took too long" log_info "inserted $num_rts routes in $diff seconds" log_test "IPv6 routes insertion rate" ip -batch $batch_dir/del.batch for i in $(seq 1 $num_nhs); do ip -6 address del 2001:db8:1::10:$i/128 dev $tor1_p1 done rm -rf $batch_dir } setup_prepare() { spine_p1=${NETIFS[p1]} tor1_p1=${NETIFS[p2]} spine_p2=${NETIFS[p3]} tor2_p1=${NETIFS[p4]} vrf_prepare forwarding_enable tor1_create tor2_create spine_create } cleanup() { pre_cleanup spine_destroy tor2_destroy tor1_destroy forwarding_restore vrf_cleanup } trap cleanup EXIT setup_prepare setup_wait tests_run exit $EXIT_STATUS

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