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 8 metric 1024
	fib4_trap_check $ns "192.0.2.0/24 dev dummy1 tos 8 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 4 metric 1024
	fib4_trap_check $ns "192.0.2.0/24 dev dummy1 tos 4 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 verified 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 4

	devlink -N $ns dev reload $devlink_dev

	fib4_trap_check $ns "192.0.2.0/24 dev dummy1 tos 4" 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
}