WIP FPC-III support

[linux/fpc-iii.git] / tools / testing / selftests / net / forwarding / fib_offload_lib.sh

# SPDX-License-Identifier: GPL-2.0
#
# Various helpers and tests to verify FIB offload.

__fib_trap_check()
{
        local ns=$1; shift
        local family=$1; shift
        local route=$1; shift
        local should_fail=$1; shift
        local ret

        ip -n $ns -j -p -$family route show $route \
                | jq -e '.[]["flags"] | contains(["trap"])' &> /dev/null
        ret=$?
        if [[ $should_fail == "true" ]]; then
                if [[ $ret -ne 0 ]]; then
                        return 0
                else
                        return 1
                fi
        fi

        return $ret
}

fib_trap_check()
{
        local ns=$1; shift
        local family=$1; shift
        local route=$1; shift
        local should_fail=$1; shift

        busywait 5000 __fib_trap_check $ns $family "$route" $should_fail
}

fib4_trap_check()
{
        local ns=$1; shift
        local route=$1; shift
        local should_fail=$1; shift

        fib_trap_check $ns 4 "$route" $should_fail
}

fib6_trap_check()
{
        local ns=$1; shift
        local route=$1; shift
        local should_fail=$1; shift

        fib_trap_check $ns 6 "$route" $should_fail
}

fib_ipv4_identical_routes_test()
{
        local ns=$1; shift
        local i

        RET=0

        for i in $(seq 1 3); do
                ip -n $ns link add name dummy$i type dummy
                ip -n $ns link set dev dummy$i up
        done

        ip -n $ns route add 192.0.2.0/24 dev dummy1 tos 0 metric 1024
        fib4_trap_check $ns "192.0.2.0/24 dev dummy1 tos 0 metric 1024" false
        check_err $? "Route not in hardware when should"

        ip -n $ns route append 192.0.2.0/24 dev dummy2 tos 0 metric 1024
        fib4_trap_check $ns "192.0.2.0/24 dev dummy2 tos 0 metric 1024" true
        check_err $? "Appended route in hardware when should not"

        ip -n $ns route prepend 192.0.2.0/24 dev dummy3 tos 0 metric 1024
        fib4_trap_check $ns "192.0.2.0/24 dev dummy3 tos 0 metric 1024" false
        check_err $? "Prepended route not in hardware when should"

        fib4_trap_check $ns "192.0.2.0/24 dev dummy1 tos 0 metric 1024" true
        check_err $? "Route was not replaced in hardware by prepended one"

        log_test "IPv4 identical routes"

        for i in $(seq 1 3); do
                ip -n $ns link del dev dummy$i
        done
}

fib_ipv4_tos_test()
{
        local ns=$1; shift

        RET=0

        ip -n $ns link add name dummy1 type dummy
        ip -n $ns link set dev dummy1 up

        ip -n $ns route add 192.0.2.0/24 dev dummy1 tos 0 metric 1024
        fib4_trap_check $ns "192.0.2.0/24 dev dummy1 tos 0 metric 1024" false
        check_err $? "Route not in hardware when should"

        ip -n $ns route add 192.0.2.0/24 dev dummy1 tos 2 metric 1024
        fib4_trap_check $ns "192.0.2.0/24 dev dummy1 tos 2 metric 1024" false
        check_err $? "Highest TOS route not in hardware when should"

        fib4_trap_check $ns "192.0.2.0/24 dev dummy1 tos 0 metric 1024" true
        check_err $? "Lowest TOS route still in hardware when should not"

        ip -n $ns route add 192.0.2.0/24 dev dummy1 tos 1 metric 1024
        fib4_trap_check $ns "192.0.2.0/24 dev dummy1 tos 1 metric 1024" true
        check_err $? "Middle TOS route in hardware when should not"

        log_test "IPv4 routes with TOS"

        ip -n $ns link del dev dummy1
}

fib_ipv4_metric_test()
{
        local ns=$1; shift

        RET=0

        ip -n $ns link add name dummy1 type dummy
        ip -n $ns link set dev dummy1 up

        ip -n $ns route add 192.0.2.0/24 dev dummy1 metric 1024
        fib4_trap_check $ns "192.0.2.0/24 dev dummy1 metric 1024" false
        check_err $? "Route not in hardware when should"

        ip -n $ns route add 192.0.2.0/24 dev dummy1 metric 1022
        fib4_trap_check $ns "192.0.2.0/24 dev dummy1 metric 1022" false
        check_err $? "Lowest metric route not in hardware when should"

        fib4_trap_check $ns "192.0.2.0/24 dev dummy1 metric 1024" true
        check_err $? "Highest metric route still in hardware when should not"

        ip -n $ns route add 192.0.2.0/24 dev dummy1 metric 1023
        fib4_trap_check $ns "192.0.2.0/24 dev dummy1 metric 1023" true
        check_err $? "Middle metric route in hardware when should not"

        log_test "IPv4 routes with metric"

        ip -n $ns link del dev dummy1
}

fib_ipv4_replace_test()
{
        local ns=$1; shift
        local i

        RET=0

        for i in $(seq 1 2); do
                ip -n $ns link add name dummy$i type dummy
                ip -n $ns link set dev dummy$i up
        done

        ip -n $ns route add 192.0.2.0/24 dev dummy1 metric 1024
        fib4_trap_check $ns "192.0.2.0/24 dev dummy1 metric 1024" false
        check_err $? "Route not in hardware when should"

        ip -n $ns route replace 192.0.2.0/24 dev dummy2 metric 1024
        fib4_trap_check $ns "192.0.2.0/24 dev dummy2 metric 1024" false
        check_err $? "Replacement route not in hardware when should"

        # Add a route with an higher metric and make sure that replacing it
        # does not affect the lower metric one.
        ip -n $ns route add 192.0.2.0/24 dev dummy1 metric 1025
        ip -n $ns route replace 192.0.2.0/24 dev dummy2 metric 1025

        fib4_trap_check $ns "192.0.2.0/24 dev dummy2 metric 1024" false
        check_err $? "Lowest metric route not in hardware when should"
        fib4_trap_check $ns "192.0.2.0/24 dev dummy2 metric 1025" true
        check_err $? "Highest metric route in hardware when should not"

        log_test "IPv4 route replace"

        for i in $(seq 1 2); do
                ip -n $ns link del dev dummy$i
        done
}

fib_ipv4_delete_test()
{
        local ns=$1; shift
        local metric

        RET=0

        ip -n $ns link add name dummy1 type dummy
        ip -n $ns link set dev dummy1 up

        # Insert multiple routes with the same prefix and length and varying
        # metrics. Make sure that throughout delete operations the lowest
        # metric route is the one in hardware.
        for metric in $(seq 1024 1026); do
                ip -n $ns route add 192.0.2.0/24 dev dummy1 metric $metric
        done

        fib4_trap_check $ns "192.0.2.0/24 dev dummy1 metric 1024" false
        check_err $? "Route not in hardware when should"

        ip -n $ns route del 192.0.2.0/24 dev dummy1 metric 1024
        fib4_trap_check $ns "192.0.2.0/24 dev dummy1 metric 1025" false
        check_err $? "Lowest metric route not in hardware when should"

        ip -n $ns route del 192.0.2.0/24 dev dummy1 metric 1026
        fib4_trap_check $ns "192.0.2.0/24 dev dummy1 metric 1025" false
        check_err $? "Sole route not in hardware when should"

        log_test "IPv4 route delete"

        ip -n $ns link del dev dummy1
}

fib_ipv4_plen_test()
{
        local ns=$1; shift

        RET=0

        ip -n $ns link add name dummy1 type dummy
        ip -n $ns link set dev dummy1 up

        # Add two routes with the same key and different prefix length and
        # make sure both are in hardware. It can be verfied that both are
        # sharing the same leaf by checking the /proc/net/fib_trie
        ip -n $ns route add 192.0.2.0/24 dev dummy1
        ip -n $ns route add 192.0.2.0/25 dev dummy1

        fib4_trap_check $ns "192.0.2.0/24 dev dummy1" false
        check_err $? "/24 not in hardware when should"

        fib4_trap_check $ns "192.0.2.0/25 dev dummy1" false
        check_err $? "/25 not in hardware when should"

        log_test "IPv4 routes with different prefix length"

        ip -n $ns link del dev dummy1
}

fib_ipv4_replay_metric_test()
{
        local ns=$1; shift
        local devlink_dev=$1; shift

        RET=0

        ip -n $ns link add name dummy1 type dummy
        ip -n $ns link set dev dummy1 up

        ip -n $ns route add 192.0.2.0/24 dev dummy1 metric 1024
        ip -n $ns route add 192.0.2.0/24 dev dummy1 metric 1025

        devlink -N $ns dev reload $devlink_dev

        fib4_trap_check $ns "192.0.2.0/24 dev dummy1 metric 1024" false
        check_err $? "Lowest metric route not in hardware when should"

        fib4_trap_check $ns "192.0.2.0/24 dev dummy1 metric 1025" true
        check_err $? "Highest metric route in hardware when should not"

        log_test "IPv4 routes replay - metric"

        ip -n $ns link del dev dummy1
}

fib_ipv4_replay_tos_test()
{
        local ns=$1; shift
        local devlink_dev=$1; shift

        RET=0

        ip -n $ns link add name dummy1 type dummy
        ip -n $ns link set dev dummy1 up

        ip -n $ns route add 192.0.2.0/24 dev dummy1 tos 0
        ip -n $ns route add 192.0.2.0/24 dev dummy1 tos 1

        devlink -N $ns dev reload $devlink_dev

        fib4_trap_check $ns "192.0.2.0/24 dev dummy1 tos 1" false
        check_err $? "Highest TOS route not in hardware when should"

        fib4_trap_check $ns "192.0.2.0/24 dev dummy1 tos 0" true
        check_err $? "Lowest TOS route in hardware when should not"

        log_test "IPv4 routes replay - TOS"

        ip -n $ns link del dev dummy1
}

fib_ipv4_replay_plen_test()
{
        local ns=$1; shift
        local devlink_dev=$1; shift

        RET=0

        ip -n $ns link add name dummy1 type dummy
        ip -n $ns link set dev dummy1 up

        ip -n $ns route add 192.0.2.0/24 dev dummy1
        ip -n $ns route add 192.0.2.0/25 dev dummy1

        devlink -N $ns dev reload $devlink_dev

        fib4_trap_check $ns "192.0.2.0/24 dev dummy1" false
        check_err $? "/24 not in hardware when should"

        fib4_trap_check $ns "192.0.2.0/25 dev dummy1" false
        check_err $? "/25 not in hardware when should"

        log_test "IPv4 routes replay - prefix length"

        ip -n $ns link del dev dummy1
}

fib_ipv4_flush_test()
{
        local ns=$1; shift
        local metric

        RET=0

        ip -n $ns link add name dummy1 type dummy
        ip -n $ns link set dev dummy1 up

        # Exercise the routes flushing code paths by inserting various
        # prefix routes on a netdev and then deleting it.
        for metric in $(seq 1 20); do
                ip -n $ns route add 192.0.2.0/24 dev dummy1 metric $metric
        done

        ip -n $ns link del dev dummy1

        log_test "IPv4 routes flushing"
}

fib_ipv6_add_test()
{
        local ns=$1; shift

        RET=0

        for i in $(seq 1 2); do
                ip -n $ns link add name dummy$i type dummy
                ip -n $ns link set dev dummy$i up
        done

        ip -n $ns route add 2001:db8:1::/64 dev dummy1 metric 1024
        fib6_trap_check $ns "2001:db8:1::/64 dev dummy1 metric 1024" false
        check_err $? "Route not in hardware when should"

        ip -n $ns route append 2001:db8:1::/64 dev dummy2 metric 1024
        fib6_trap_check $ns "2001:db8:1::/64 dev dummy2 metric 1024" true
        check_err $? "Route in hardware when should not"

        fib6_trap_check $ns "2001:db8:1::/64 dev dummy1 metric 1024" false
        check_err $? "Route not in hardware after appending route"

        log_test "IPv6 single route add"

        for i in $(seq 1 2); do
                ip -n $ns link del dev dummy$i
        done
}

fib_ipv6_metric_test()
{
        local ns=$1; shift

        RET=0

        ip -n $ns link add name dummy1 type dummy
        ip -n $ns link set dev dummy1 up

        ip -n $ns route add 2001:db8:1::/64 dev dummy1 metric 1024
        fib6_trap_check $ns "2001:db8:1::/64 dev dummy1 metric 1024" false
        check_err $? "Route not in hardware when should"

        ip -n $ns route add 2001:db8:1::/64 dev dummy1 metric 1022
        fib6_trap_check $ns "2001:db8:1::/64 dev dummy1 metric 1022" false
        check_err $? "Lowest metric route not in hardware when should"

        fib6_trap_check $ns "2001:db8:1::/64 dev dummy1 metric 1024" true
        check_err $? "Highest metric route still in hardware when should not"

        ip -n $ns route add 2001:db8:1::/64 dev dummy1 metric 1023
        fib6_trap_check $ns "2001:db8:1::/64 dev dummy1 metric 1023" true
        check_err $? "Middle metric route in hardware when should not"

        log_test "IPv6 routes with metric"

        ip -n $ns link del dev dummy1
}

fib_ipv6_append_single_test()
{
        local ns=$1; shift

        # When an IPv6 multipath route is added without the 'nexthop' keyword,
        # different code paths are taken compared to when the keyword is used.
        # This test tries to verify the former.
        RET=0

        for i in $(seq 1 2); do
                ip -n $ns link add name dummy$i type dummy
                ip -n $ns link set dev dummy$i up
                ip -n $ns address add 2001:db8:$i::1/64 dev dummy$i
        done

        ip -n $ns route add 2001:db8:10::/64 via 2001:db8:1::2 metric 1024
        fib6_trap_check $ns "2001:db8:10::/64 metric 1024" false
        check_err $? "Route not in hardware when should"

        ip -n $ns route append 2001:db8:10::/64 via 2001:db8:2::2 metric 1024
        fib6_trap_check $ns "2001:db8:10::/64 metric 1024" false
        check_err $? "Route not in hardware after appending"

        ip -n $ns route add 2001:db8:10::/64 via 2001:db8:1::2 metric 1025
        fib6_trap_check $ns "2001:db8:10::/64 metric 1025" true
        check_err $? "Route in hardware when should not"

        ip -n $ns route append 2001:db8:10::/64 via 2001:db8:2::2 metric 1025
        fib6_trap_check $ns "2001:db8:10::/64 metric 1025" true
        check_err $? "Route in hardware when should not after appending"

        fib6_trap_check $ns "2001:db8:10::/64 metric 1024" false
        check_err $? "Lowest metric route not in hardware when should"

        log_test "IPv6 append single route without 'nexthop' keyword"

        for i in $(seq 1 2); do
                ip -n $ns link del dev dummy$i
        done
}

fib_ipv6_replace_single_test()
{
        local ns=$1; shift
        local i

        RET=0

        for i in $(seq 1 2); do
                ip -n $ns link add name dummy$i type dummy
                ip -n $ns link set dev dummy$i up
        done

        ip -n $ns route add 2001:db8:1::/64 dev dummy1 metric 1024
        fib6_trap_check $ns "2001:db8:1::/64 dev dummy1 metric 1024" false
        check_err $? "Route not in hardware when should"

        ip -n $ns route replace 2001:db8:1::/64 dev dummy2 metric 1024
        fib6_trap_check $ns "2001:db8:1::/64 dev dummy2 metric 1024" false
        check_err $? "Replacement route not in hardware when should"

        # Add a route with an higher metric and make sure that replacing it
        # does not affect the lower metric one.
        ip -n $ns route add 2001:db8:1::/64 dev dummy1 metric 1025
        ip -n $ns route replace 2001:db8:1::/64 dev dummy2 metric 1025

        fib6_trap_check $ns "2001:db8:1::/64 dev dummy2 metric 1024" false
        check_err $? "Lowest metric route not in hardware when should"
        fib6_trap_check $ns "2001:db8:1::/64 dev dummy2 metric 1025" true
        check_err $? "Highest metric route in hardware when should not"

        log_test "IPv6 single route replace"

        for i in $(seq 1 2); do
                ip -n $ns link del dev dummy$i
        done
}

fib_ipv6_metric_multipath_test()
{
        local ns=$1; shift

        RET=0

        for i in $(seq 1 2); do
                ip -n $ns link add name dummy$i type dummy
                ip -n $ns link set dev dummy$i up
                ip -n $ns address add 2001:db8:$i::1/64 dev dummy$i
        done

        ip -n $ns route add 2001:db8:10::/64 metric 1024 \
                nexthop via 2001:db8:1::2 dev dummy1 \
                nexthop via 2001:db8:2::2 dev dummy2
        fib6_trap_check $ns "2001:db8:10::/64 metric 1024" false
        check_err $? "Route not in hardware when should"

        ip -n $ns route add 2001:db8:10::/64 metric 1022 \
                nexthop via 2001:db8:1::2 dev dummy1 \
                nexthop via 2001:db8:2::2 dev dummy2
        fib6_trap_check $ns "2001:db8:10::/64 metric 1022" false
        check_err $? "Lowest metric route not in hardware when should"

        ip -n $ns route add 2001:db8:10::/64 metric 1023 \
                nexthop via 2001:db8:1::2 dev dummy1 \
                nexthop via 2001:db8:2::2 dev dummy2
        fib6_trap_check $ns "2001:db8:10::/64 metric 1024" true
        check_err $? "Highest metric route still in hardware when should not"

        fib6_trap_check $ns "2001:db8:10::/64 metric 1023" true
        check_err $? "Middle metric route in hardware when should not"

        log_test "IPv6 multipath routes with metric"

        for i in $(seq 1 2); do
                ip -n $ns link del dev dummy$i
        done
}

fib_ipv6_append_multipath_test()
{
        local ns=$1; shift

        RET=0

        for i in $(seq 1 3); do
                ip -n $ns link add name dummy$i type dummy
                ip -n $ns link set dev dummy$i up
                ip -n $ns address add 2001:db8:$i::1/64 dev dummy$i
        done

        ip -n $ns route add 2001:db8:10::/64 metric 1024 \
                nexthop via 2001:db8:1::2 dev dummy1
        fib6_trap_check $ns "2001:db8:10::/64 metric 1024" false
        check_err $? "Route not in hardware when should"

        ip -n $ns route append 2001:db8:10::/64 metric 1024 \
                nexthop via 2001:db8:2::2 dev dummy2 \
                nexthop via 2001:db8:3::2 dev dummy3
        fib6_trap_check $ns "2001:db8:10::/64 metric 1024" false
        check_err $? "Route not in hardware after appending"

        ip -n $ns route add 2001:db8:10::/64 metric 1025 \
                nexthop via 2001:db8:1::2 dev dummy1
        fib6_trap_check $ns "2001:db8:10::/64 metric 1025" true
        check_err $? "Route in hardware when should not"

        ip -n $ns route append 2001:db8:10::/64 metric 1025 \
                nexthop via 2001:db8:2::2 dev dummy2 \
                nexthop via 2001:db8:3::2 dev dummy3
        fib6_trap_check $ns "2001:db8:10::/64 metric 1025" true
        check_err $? "Route in hardware when should not after appending"

        fib6_trap_check $ns "2001:db8:10::/64 metric 1024" false
        check_err $? "Lowest metric route not in hardware when should"

        log_test "IPv6 append multipath route with 'nexthop' keyword"

        for i in $(seq 1 3); do
                ip -n $ns link del dev dummy$i
        done
}

fib_ipv6_replace_multipath_test()
{
        local ns=$1; shift
        local i

        RET=0

        for i in $(seq 1 3); do
                ip -n $ns link add name dummy$i type dummy
                ip -n $ns link set dev dummy$i up
                ip -n $ns address add 2001:db8:$i::1/64 dev dummy$i
        done

        ip -n $ns route add 2001:db8:10::/64 metric 1024 \
                nexthop via 2001:db8:1::2 dev dummy1 \
                nexthop via 2001:db8:2::2 dev dummy2
        fib6_trap_check $ns "2001:db8:10::/64 metric 1024" false
        check_err $? "Route not in hardware when should"

        ip -n $ns route replace 2001:db8:10::/64 metric 1024 \
                nexthop via 2001:db8:1::2 dev dummy1 \
                nexthop via 2001:db8:3::2 dev dummy3
        fib6_trap_check $ns "2001:db8:10::/64 metric 1024" false
        check_err $? "Replacement route not in hardware when should"

        # Add a route with an higher metric and make sure that replacing it
        # does not affect the lower metric one.
        ip -n $ns route add 2001:db8:10::/64 metric 1025 \
                nexthop via 2001:db8:1::2 dev dummy1 \
                nexthop via 2001:db8:2::2 dev dummy2
        ip -n $ns route replace 2001:db8:10::/64 metric 1025 \
                nexthop via 2001:db8:1::2 dev dummy1 \
                nexthop via 2001:db8:3::2 dev dummy3

        fib6_trap_check $ns "2001:db8:10::/64 metric 1024" false
        check_err $? "Lowest metric route not in hardware when should"
        fib6_trap_check $ns "2001:db8:10::/64 metric 1025" true
        check_err $? "Highest metric route in hardware when should not"

        log_test "IPv6 multipath route replace"

        for i in $(seq 1 3); do
                ip -n $ns link del dev dummy$i
        done
}

fib_ipv6_append_multipath_to_single_test()
{
        local ns=$1; shift

        # Test that when the first route in the leaf is not a multipath route
        # and we try to append a multipath route with the same metric to it, it
        # is not notified.
        RET=0

        for i in $(seq 1 2); do
                ip -n $ns link add name dummy$i type dummy
                ip -n $ns link set dev dummy$i up
                ip -n $ns address add 2001:db8:$i::1/64 dev dummy$i
        done

        ip -n $ns route add 2001:db8:10::/64 dev dummy1 metric 1024
        fib6_trap_check $ns "2001:db8:10::/64 dev dummy1 metric 1024" false
        check_err $? "Route not in hardware when should"

        ip -n $ns route append 2001:db8:10::/64 metric 1024 \
                nexthop via 2001:db8:2::2 dev dummy2
        fib6_trap_check $ns "2001:db8:10::/64 dev dummy2 metric 1024" true
        check_err $? "Route in hardware when should not"

        fib6_trap_check $ns "2001:db8:10::/64 dev dummy1 metric 1024" false
        check_err $? "Route not in hardware after append"

        log_test "IPv6 append multipath route to non-multipath route"

        for i in $(seq 1 2); do
                ip -n $ns link del dev dummy$i
        done
}

fib_ipv6_delete_single_test()
{
        local ns=$1; shift

        # Test various deletion scenarios, where only a single route is
        # deleted from the FIB node.
        for i in $(seq 1 2); do
                ip -n $ns link add name dummy$i type dummy
                ip -n $ns link set dev dummy$i up
                ip -n $ns address add 2001:db8:$i::1/64 dev dummy$i
        done

        # Test deletion of a single route when it is the only route in the FIB
        # node.
        RET=0

        ip -n $ns route add 2001:db8:10::/64 dev dummy1 metric 1024
        ip -n $ns route del 2001:db8:10::/64 dev dummy1 metric 1024

        log_test "IPv6 delete sole single route"

        # Test that deletion of last route does not affect the first one.
        RET=0

        ip -n $ns route add 2001:db8:10::/64 dev dummy1 metric 1024
        ip -n $ns route add 2001:db8:10::/64 dev dummy1 metric 1025
        ip -n $ns route del 2001:db8:10::/64 dev dummy1 metric 1025

        fib6_trap_check $ns "2001:db8:10::/64 dev dummy1 metric 1024" false
        check_err $? "Route not in hardware after deleting higher metric route"

        log_test "IPv6 delete single route not in hardware"

        ip -n $ns route del 2001:db8:10::/64 dev dummy1 metric 1024

        # Test that first route is replaced by next single route in the FIB
        # node.
        RET=0

        ip -n $ns route add 2001:db8:10::/64 dev dummy1 metric 1024
        ip -n $ns route add 2001:db8:10::/64 dev dummy1 metric 1025
        ip -n $ns route del 2001:db8:10::/64 dev dummy1 metric 1024

        fib6_trap_check $ns "2001:db8:10::/64 dev dummy1 metric 1025" false
        check_err $? "Route not in hardware after deleting lowest metric route"

        log_test "IPv6 delete single route - replaced by single"

        ip -n $ns route del 2001:db8:10::/64 dev dummy1 metric 1025

        # Test that first route is replaced by next multipath route in the FIB
        # node.
        RET=0

        ip -n $ns route add 2001:db8:10::/64 dev dummy1 metric 1024
        ip -n $ns route add 2001:db8:10::/64 metric 1025 \
                nexthop via 2001:db8:1::2 dev dummy1 \
                nexthop via 2001:db8:2::2 dev dummy2
        ip -n $ns route del 2001:db8:10::/64 dev dummy1 metric 1024

        fib6_trap_check $ns "2001:db8:10::/64 metric 1025" false
        check_err $? "Route not in hardware after deleting lowest metric route"

        log_test "IPv6 delete single route - replaced by multipath"

        ip -n $ns route del 2001:db8:10::/64 metric 1025

        # Test deletion of a single nexthop from a multipath route.
        ip -n $ns route add 2001:db8:10::/64 metric 1024 \
                nexthop via 2001:db8:1::2 dev dummy1 \
                nexthop via 2001:db8:2::2 dev dummy2
        ip -n $ns route del 2001:db8:10::/64 metric 1024 \
                nexthop via 2001:db8:1::2 dev dummy1

        fib6_trap_check $ns "2001:db8:10::/64 metric 1024" false
        check_err $? "Route not in hardware after deleting a single nexthop"

        log_test "IPv6 delete single nexthop"

        ip -n $ns route del 2001:db8:10::/64 metric 1024

        for i in $(seq 1 2); do
                ip -n $ns link del dev dummy$i
        done
}

fib_ipv6_delete_multipath_test()
{
        local ns=$1; shift

        # Test various deletion scenarios, where an entire multipath route is
        # deleted from the FIB node.
        for i in $(seq 1 2); do
                ip -n $ns link add name dummy$i type dummy
                ip -n $ns link set dev dummy$i up
                ip -n $ns address add 2001:db8:$i::1/64 dev dummy$i
        done

        # Test deletion of a multipath route when it is the only route in the
        # FIB node.
        RET=0

        ip -n $ns route add 2001:db8:10::/64 metric 1024 \
                nexthop via 2001:db8:1::2 dev dummy1 \
                nexthop via 2001:db8:2::2 dev dummy2
        ip -n $ns route del 2001:db8:10::/64 metric 1024

        log_test "IPv6 delete sole multipath route"

        # Test that deletion of last route does not affect the first one.
        RET=0

        ip -n $ns route add 2001:db8:10::/64 metric 1024 \
                nexthop via 2001:db8:1::2 dev dummy1 \
                nexthop via 2001:db8:2::2 dev dummy2
        ip -n $ns route add 2001:db8:10::/64 metric 1025 \
                nexthop via 2001:db8:1::2 dev dummy1 \
                nexthop via 2001:db8:2::2 dev dummy2
        ip -n $ns route del 2001:db8:10::/64 metric 1025

        fib6_trap_check $ns "2001:db8:10::/64 metric 1024" false
        check_err $? "Route not in hardware after deleting higher metric route"

        log_test "IPv6 delete multipath route not in hardware"

        ip -n $ns route del 2001:db8:10::/64 metric 1024

        # Test that first route is replaced by next single route in the FIB
        # node.
        RET=0

        ip -n $ns route add 2001:db8:10::/64 metric 1024 \
                nexthop via 2001:db8:1::2 dev dummy1 \
                nexthop via 2001:db8:2::2 dev dummy2
        ip -n $ns route add 2001:db8:10::/64 dev dummy1 metric 1025
        ip -n $ns route del 2001:db8:10::/64 metric 1024

        fib6_trap_check $ns "2001:db8:10::/64 dev dummy1 metric 1025" false
        check_err $? "Route not in hardware after deleting lowest metric route"

        log_test "IPv6 delete multipath route - replaced by single"

        ip -n $ns route del 2001:db8:10::/64 dev dummy1 metric 1025

        # Test that first route is replaced by next multipath route in the FIB
        # node.
        RET=0

        ip -n $ns route add 2001:db8:10::/64 metric 1024 \
                nexthop via 2001:db8:1::2 dev dummy1 \
                nexthop via 2001:db8:2::2 dev dummy2
        ip -n $ns route add 2001:db8:10::/64 metric 1025 \
                nexthop via 2001:db8:1::2 dev dummy1 \
                nexthop via 2001:db8:2::2 dev dummy2
        ip -n $ns route del 2001:db8:10::/64 metric 1024

        fib6_trap_check $ns "2001:db8:10::/64 metric 1025" false
        check_err $? "Route not in hardware after deleting lowest metric route"

        log_test "IPv6 delete multipath route - replaced by multipath"

        ip -n $ns route del 2001:db8:10::/64 metric 1025

        for i in $(seq 1 2); do
                ip -n $ns link del dev dummy$i
        done
}

fib_ipv6_replay_single_test()
{
        local ns=$1; shift
        local devlink_dev=$1; shift

        RET=0

        for i in $(seq 1 2); do
                ip -n $ns link add name dummy$i type dummy
                ip -n $ns link set dev dummy$i up
        done

        ip -n $ns route add 2001:db8:1::/64 dev dummy1
        ip -n $ns route append 2001:db8:1::/64 dev dummy2

        devlink -N $ns dev reload $devlink_dev

        fib6_trap_check $ns "2001:db8:1::/64 dev dummy1" false
        check_err $? "First route not in hardware when should"

        fib6_trap_check $ns "2001:db8:1::/64 dev dummy2" true
        check_err $? "Second route in hardware when should not"

        log_test "IPv6 routes replay - single route"

        for i in $(seq 1 2); do
                ip -n $ns link del dev dummy$i
        done
}

fib_ipv6_replay_multipath_test()
{
        local ns=$1; shift
        local devlink_dev=$1; shift

        RET=0

        for i in $(seq 1 2); do
                ip -n $ns link add name dummy$i type dummy
                ip -n $ns link set dev dummy$i up
                ip -n $ns address add 2001:db8:$i::1/64 dev dummy$i
        done

        ip -n $ns route add 2001:db8:10::/64 metric 1024 \
                nexthop via 2001:db8:1::2 dev dummy1 \
                nexthop via 2001:db8:2::2 dev dummy2
        ip -n $ns route add 2001:db8:10::/64 metric 1025 \
                nexthop via 2001:db8:1::2 dev dummy1 \
                nexthop via 2001:db8:2::2 dev dummy2

        devlink -N $ns dev reload $devlink_dev

        fib6_trap_check $ns "2001:db8:10::/64 metric 1024" false
        check_err $? "First route not in hardware when should"

        fib6_trap_check $ns "2001:db8:10::/64 metric 1025" true
        check_err $? "Second route in hardware when should not"

        log_test "IPv6 routes replay - multipath route"

        for i in $(seq 1 2); do
                ip -n $ns link del dev dummy$i
        done
}