Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 12ee8220 authored by Ido Schimmel's avatar Ido Schimmel Committed by David S. Miller
Browse files

selftests: mlxsw: Add a test for FIB offload indication 



Test that the offload indication for unicast routes is correctly set in
different scenarios. IPv4 support will be added in the future.

Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d5382fef

tools/testing/selftests/drivers/net/mlxsw/fib_offload.sh

0 → 100755
+349 −0
Original line number Diff line number Diff line 
#!/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