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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
ALL_TESTS="ping_ipv4 ping_ipv6 multipath_test"
NUM_NETIFS=8
source lib.sh
h1_create()
{
vrf_create "vrf-h1"
ip link set dev $h1 master vrf-h1
ip link set dev vrf-h1 up
ip link set dev $h1 up
ip address add 192.0.2.2/24 dev $h1
ip address add 2001:db8:1::2/64 dev $h1
ip route add 198.51.100.0/24 vrf vrf-h1 nexthop via 192.0.2.1
ip route add 2001:db8:2::/64 vrf vrf-h1 nexthop via 2001:db8:1::1
}
h1_destroy()
{
ip route del 2001:db8:2::/64 vrf vrf-h1
ip route del 198.51.100.0/24 vrf vrf-h1
ip address del 2001:db8:1::2/64 dev $h1
ip address del 192.0.2.2/24 dev $h1
ip link set dev $h1 down
vrf_destroy "vrf-h1"
}
h2_create()
{
vrf_create "vrf-h2"
ip link set dev $h2 master vrf-h2
ip link set dev vrf-h2 up
ip link set dev $h2 up
ip address add 198.51.100.2/24 dev $h2
ip address add 2001:db8:2::2/64 dev $h2
ip route add 192.0.2.0/24 vrf vrf-h2 nexthop via 198.51.100.1
ip route add 2001:db8:1::/64 vrf vrf-h2 nexthop via 2001:db8:2::1
}
h2_destroy()
{
ip route del 2001:db8:1::/64 vrf vrf-h2
ip route del 192.0.2.0/24 vrf vrf-h2
ip address del 2001:db8:2::2/64 dev $h2
ip address del 198.51.100.2/24 dev $h2
ip link set dev $h2 down
vrf_destroy "vrf-h2"
}
router1_create()
{
vrf_create "vrf-r1"
ip link set dev $rp11 master vrf-r1
ip link set dev $rp12 master vrf-r1
ip link set dev $rp13 master vrf-r1
ip link set dev vrf-r1 up
ip link set dev $rp11 up
ip link set dev $rp12 up
ip link set dev $rp13 up
ip address add 192.0.2.1/24 dev $rp11
ip address add 2001:db8:1::1/64 dev $rp11
ip address add 169.254.2.12/24 dev $rp12
ip address add fe80:2::12/64 dev $rp12
ip address add 169.254.3.13/24 dev $rp13
ip address add fe80:3::13/64 dev $rp13
ip route add 198.51.100.0/24 vrf vrf-r1 \
nexthop via 169.254.2.22 dev $rp12 \
nexthop via 169.254.3.23 dev $rp13
ip route add 2001:db8:2::/64 vrf vrf-r1 \
nexthop via fe80:2::22 dev $rp12 \
nexthop via fe80:3::23 dev $rp13
}
router1_destroy()
{
ip route del 2001:db8:2::/64 vrf vrf-r1
ip route del 198.51.100.0/24 vrf vrf-r1
ip address del fe80:3::13/64 dev $rp13
ip address del 169.254.3.13/24 dev $rp13
ip address del fe80:2::12/64 dev $rp12
ip address del 169.254.2.12/24 dev $rp12
ip address del 2001:db8:1::1/64 dev $rp11
ip address del 192.0.2.1/24 dev $rp11
ip link set dev $rp13 down
ip link set dev $rp12 down
ip link set dev $rp11 down
vrf_destroy "vrf-r1"
}
router2_create()
{
vrf_create "vrf-r2"
ip link set dev $rp21 master vrf-r2
ip link set dev $rp22 master vrf-r2
ip link set dev $rp23 master vrf-r2
ip link set dev vrf-r2 up
ip link set dev $rp21 up
ip link set dev $rp22 up
ip link set dev $rp23 up
ip address add 198.51.100.1/24 dev $rp21
ip address add 2001:db8:2::1/64 dev $rp21
ip address add 169.254.2.22/24 dev $rp22
ip address add fe80:2::22/64 dev $rp22
ip address add 169.254.3.23/24 dev $rp23
ip address add fe80:3::23/64 dev $rp23
ip route add 192.0.2.0/24 vrf vrf-r2 \
nexthop via 169.254.2.12 dev $rp22 \
nexthop via 169.254.3.13 dev $rp23
ip route add 2001:db8:1::/64 vrf vrf-r2 \
nexthop via fe80:2::12 dev $rp22 \
nexthop via fe80:3::13 dev $rp23
}
router2_destroy()
{
ip route del 2001:db8:1::/64 vrf vrf-r2
ip route del 192.0.2.0/24 vrf vrf-r2
ip address del fe80:3::23/64 dev $rp23
ip address del 169.254.3.23/24 dev $rp23
ip address del fe80:2::22/64 dev $rp22
ip address del 169.254.2.22/24 dev $rp22
ip address del 2001:db8:2::1/64 dev $rp21
ip address del 198.51.100.1/24 dev $rp21
ip link set dev $rp23 down
ip link set dev $rp22 down
ip link set dev $rp21 down
vrf_destroy "vrf-r2"
}
multipath_eval()
{
local desc="$1"
local weight_rp12=$2
local weight_rp13=$3
local packets_rp12=$4
local packets_rp13=$5
local weights_ratio packets_ratio diff
RET=0
if [[ "$packets_rp12" -eq "0" || "$packets_rp13" -eq "0" ]]; then
check_err 1 "Packet difference is 0"
log_test "Multipath"
log_info "Expected ratio $weights_ratio"
return
fi
if [[ "$weight_rp12" -gt "$weight_rp13" ]]; then
weights_ratio=$(echo "scale=2; $weight_rp12 / $weight_rp13" \
| bc -l)
packets_ratio=$(echo "scale=2; $packets_rp12 / $packets_rp13" \
| bc -l)
else
weights_ratio=$(echo "scale=2; $weight_rp13 / $weight_rp12" | \
bc -l)
packets_ratio=$(echo "scale=2; $packets_rp13 / $packets_rp12" | \
bc -l)
fi
diff=$(echo $weights_ratio - $packets_ratio | bc -l)
diff=${diff#-}
test "$(echo "$diff / $weights_ratio > 0.15" | bc -l)" -eq 0
check_err $? "Too large discrepancy between expected and measured ratios"
log_test "$desc"
log_info "Expected ratio $weights_ratio Measured ratio $packets_ratio"
}
multipath4_test()
{
local desc="$1"
local weight_rp12=$2
local weight_rp13=$3
local t0_rp12 t0_rp13 t1_rp12 t1_rp13
local packets_rp12 packets_rp13
# Transmit multiple flows from h1 to h2 and make sure they are
# distributed between both multipath links (rp12 and rp13)
# according to the configured weights.
sysctl_set net.ipv4.fib_multipath_hash_policy 1
ip route replace 198.51.100.0/24 vrf vrf-r1 \
nexthop via 169.254.2.22 dev $rp12 weight $weight_rp12 \
nexthop via 169.254.3.23 dev $rp13 weight $weight_rp13
t0_rp12=$(link_stats_tx_packets_get $rp12)
t0_rp13=$(link_stats_tx_packets_get $rp13)
ip vrf exec vrf-h1 $MZ -q -p 64 -A 192.0.2.2 -B 198.51.100.2 \
-d 1msec -t udp "sp=1024,dp=0-32768"
t1_rp12=$(link_stats_tx_packets_get $rp12)
t1_rp13=$(link_stats_tx_packets_get $rp13)
let "packets_rp12 = $t1_rp12 - $t0_rp12"
let "packets_rp13 = $t1_rp13 - $t0_rp13"
multipath_eval "$desc" $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13
# Restore settings.
ip route replace 198.51.100.0/24 vrf vrf-r1 \
nexthop via 169.254.2.22 dev $rp12 \
nexthop via 169.254.3.23 dev $rp13
sysctl_restore net.ipv4.fib_multipath_hash_policy
}
multipath6_l4_test()
{
local desc="$1"
local weight_rp12=$2
local weight_rp13=$3
local t0_rp12 t0_rp13 t1_rp12 t1_rp13
local packets_rp12 packets_rp13
# Transmit multiple flows from h1 to h2 and make sure they are
# distributed between both multipath links (rp12 and rp13)
# according to the configured weights.
sysctl_set net.ipv6.fib_multipath_hash_policy 1
ip route replace 2001:db8:2::/64 vrf vrf-r1 \
nexthop via fe80:2::22 dev $rp12 weight $weight_rp12 \
nexthop via fe80:3::23 dev $rp13 weight $weight_rp13
t0_rp12=$(link_stats_tx_packets_get $rp12)
t0_rp13=$(link_stats_tx_packets_get $rp13)
$MZ $h1 -6 -q -p 64 -A 2001:db8:1::2 -B 2001:db8:2::2 \
-d 1msec -t udp "sp=1024,dp=0-32768"
t1_rp12=$(link_stats_tx_packets_get $rp12)
t1_rp13=$(link_stats_tx_packets_get $rp13)
let "packets_rp12 = $t1_rp12 - $t0_rp12"
let "packets_rp13 = $t1_rp13 - $t0_rp13"
multipath_eval "$desc" $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13
ip route replace 2001:db8:2::/64 vrf vrf-r1 \
nexthop via fe80:2::22 dev $rp12 \
nexthop via fe80:3::23 dev $rp13
sysctl_restore net.ipv6.fib_multipath_hash_policy
}
multipath6_test()
{
local desc="$1"
local weight_rp12=$2
local weight_rp13=$3
local t0_rp12 t0_rp13 t1_rp12 t1_rp13
local packets_rp12 packets_rp13
ip route replace 2001:db8:2::/64 vrf vrf-r1 \
nexthop via fe80:2::22 dev $rp12 weight $weight_rp12 \
nexthop via fe80:3::23 dev $rp13 weight $weight_rp13
t0_rp12=$(link_stats_tx_packets_get $rp12)
t0_rp13=$(link_stats_tx_packets_get $rp13)
# Generate 16384 echo requests, each with a random flow label.
for _ in $(seq 1 16384); do
ip vrf exec vrf-h1 $PING6 2001:db8:2::2 -F 0 -c 1 -q &> /dev/null
done
t1_rp12=$(link_stats_tx_packets_get $rp12)
t1_rp13=$(link_stats_tx_packets_get $rp13)
let "packets_rp12 = $t1_rp12 - $t0_rp12"
let "packets_rp13 = $t1_rp13 - $t0_rp13"
multipath_eval "$desc" $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13
ip route replace 2001:db8:2::/64 vrf vrf-r1 \
nexthop via fe80:2::22 dev $rp12 \
nexthop via fe80:3::23 dev $rp13
}
multipath_test()
{
log_info "Running IPv4 multipath tests"
multipath4_test "ECMP" 1 1
multipath4_test "Weighted MP 2:1" 2 1
multipath4_test "Weighted MP 11:45" 11 45
log_info "Running IPv6 multipath tests"
multipath6_test "ECMP" 1 1
multipath6_test "Weighted MP 2:1" 2 1
multipath6_test "Weighted MP 11:45" 11 45
log_info "Running IPv6 L4 hash multipath tests"
multipath6_l4_test "ECMP" 1 1
multipath6_l4_test "Weighted MP 2:1" 2 1
multipath6_l4_test "Weighted MP 11:45" 11 45
}
setup_prepare()
{
h1=${NETIFS[p1]}
rp11=${NETIFS[p2]}
rp12=${NETIFS[p3]}
rp22=${NETIFS[p4]}
rp13=${NETIFS[p5]}
rp23=${NETIFS[p6]}
rp21=${NETIFS[p7]}
h2=${NETIFS[p8]}
vrf_prepare
h1_create
h2_create
router1_create
router2_create
forwarding_enable
}
cleanup()
{
pre_cleanup
forwarding_restore
router2_destroy
router1_destroy
h2_destroy
h1_destroy
vrf_cleanup
}
ping_ipv4()
{
ping_test $h1 198.51.100.2
}
ping_ipv6()
{
ping6_test $h1 2001:db8:2::2
}
trap cleanup EXIT
setup_prepare
setup_wait
tests_run
exit $EXIT_STATUS
|
