diff options
Diffstat (limited to 'tools/testing/selftests/net/forwarding/router_multipath.sh')
| -rwxr-xr-x | tools/testing/selftests/net/forwarding/router_multipath.sh | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/tools/testing/selftests/net/forwarding/router_multipath.sh b/tools/testing/selftests/net/forwarding/router_multipath.sh index 86d189b42e9b..5b425dffb5d0 100755 --- a/tools/testing/selftests/net/forwarding/router_multipath.sh +++ b/tools/testing/selftests/net/forwarding/router_multipath.sh @@ -158,6 +158,82 @@ router2_destroy() vrf_destroy "vrf-r2" } +multipath_eval() +{ + local weight_rp12=$1 + local weight_rp13=$2 + local packets_rp12=$3 + local packets_rp13=$4 + local weights_ratio packets_ratio diff + + RET=0 + + if [[ "$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 > 0.1" | bc -l)" -eq 0 + check_err $? "Too large discrepancy between expected and measured ratios" + log_test "Multipath" + log_info "Expected ratio $weights_ratio Measured ratio $packets_ratio" +} + +multipath4_test() +{ + local weight_rp12=$1 + local weight_rp13=$2 + local t0_rp12 t0_rp13 t1_rp12 t1_rp13 + local packets_rp12 packets_rp13 + local hash_policy + + # Transmit multiple flows from h1 to h2 and make sure they are + # distributed between both multipath links (rp12 and rp13) + # according to the configured weights. + hash_policy=$(sysctl -n net.ipv4.fib_multipath_hash_policy) + sysctl -q -w 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 $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 $rp13 + sysctl -q -w net.ipv4.fib_multipath_hash_policy=$hash_policy +} + +multipath_test() +{ + log_info "Running IPv4 multipath tests" + multipath4_test 1 1 + multipath4_test 2 1 + multipath4_test 11 45 +} + setup_prepare() { h1=${NETIFS[p1]} @@ -205,5 +281,6 @@ setup_wait ping_test $h1 198.51.100.2 ping6_test $h1 2001:db8:2::2 +multipath_test exit $EXIT_STATUS |