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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