| #!/bin/bash |
| # SPDX-License-Identifier: GPL-2.0 |
| # |
| # Test traffic distribution between two paths when using custom hash policy. |
| # |
| # +--------------------------------+ |
| # | H1 | |
| # | $h1 + | |
| # | 198.51.100.{2-253}/24 | | |
| # | 2001:db8:1::{2-fd}/64 | | |
| # +-------------------------|------+ |
| # | |
| # +-------------------------|-------------------------+ |
| # | SW1 | | |
| # | $rp1 + | |
| # | 198.51.100.1/24 | |
| # | 2001:db8:1::1/64 | |
| # | | |
| # | | |
| # | $rp11 + + $rp12 | |
| # | 192.0.2.1/28 | | 192.0.2.17/28 | |
| # | 2001:db8:2::1/64 | | 2001:db8:3::1/64 | |
| # +------------------|-------------|------------------+ |
| # | | |
| # +------------------|-------------|------------------+ |
| # | SW2 | | | |
| # | | | | |
| # | $rp21 + + $rp22 | |
| # | 192.0.2.2/28 192.0.2.18/28 | |
| # | 2001:db8:2::2/64 2001:db8:3::2/64 | |
| # | | |
| # | | |
| # | $rp2 + | |
| # | 203.0.113.1/24 | | |
| # | 2001:db8:4::1/64 | | |
| # +-------------------------|-------------------------+ |
| # | |
| # +-------------------------|------+ |
| # | H2 | | |
| # | $h2 + | |
| # | 203.0.113.{2-253}/24 | |
| # | 2001:db8:4::{2-fd}/64 | |
| # +--------------------------------+ |
| |
| ALL_TESTS=" |
| ping_ipv4 |
| ping_ipv6 |
| custom_hash |
| " |
| |
| NUM_NETIFS=8 |
| source lib.sh |
| |
| h1_create() |
| { |
| simple_if_init $h1 198.51.100.2/24 2001:db8:1::2/64 |
| ip route add vrf v$h1 default via 198.51.100.1 dev $h1 |
| ip -6 route add vrf v$h1 default via 2001:db8:1::1 dev $h1 |
| } |
| |
| h1_destroy() |
| { |
| ip -6 route del vrf v$h1 default |
| ip route del vrf v$h1 default |
| simple_if_fini $h1 198.51.100.2/24 2001:db8:1::2/64 |
| } |
| |
| sw1_create() |
| { |
| simple_if_init $rp1 198.51.100.1/24 2001:db8:1::1/64 |
| __simple_if_init $rp11 v$rp1 192.0.2.1/28 2001:db8:2::1/64 |
| __simple_if_init $rp12 v$rp1 192.0.2.17/28 2001:db8:3::1/64 |
| |
| ip route add vrf v$rp1 203.0.113.0/24 \ |
| nexthop via 192.0.2.2 dev $rp11 \ |
| nexthop via 192.0.2.18 dev $rp12 |
| |
| ip -6 route add vrf v$rp1 2001:db8:4::/64 \ |
| nexthop via 2001:db8:2::2 dev $rp11 \ |
| nexthop via 2001:db8:3::2 dev $rp12 |
| } |
| |
| sw1_destroy() |
| { |
| ip -6 route del vrf v$rp1 2001:db8:4::/64 |
| |
| ip route del vrf v$rp1 203.0.113.0/24 |
| |
| __simple_if_fini $rp12 192.0.2.17/28 2001:db8:3::1/64 |
| __simple_if_fini $rp11 192.0.2.1/28 2001:db8:2::1/64 |
| simple_if_fini $rp1 198.51.100.1/24 2001:db8:1::1/64 |
| } |
| |
| sw2_create() |
| { |
| simple_if_init $rp2 203.0.113.1/24 2001:db8:4::1/64 |
| __simple_if_init $rp21 v$rp2 192.0.2.2/28 2001:db8:2::2/64 |
| __simple_if_init $rp22 v$rp2 192.0.2.18/28 2001:db8:3::2/64 |
| |
| ip route add vrf v$rp2 198.51.100.0/24 \ |
| nexthop via 192.0.2.1 dev $rp21 \ |
| nexthop via 192.0.2.17 dev $rp22 |
| |
| ip -6 route add vrf v$rp2 2001:db8:1::/64 \ |
| nexthop via 2001:db8:2::1 dev $rp21 \ |
| nexthop via 2001:db8:3::1 dev $rp22 |
| } |
| |
| sw2_destroy() |
| { |
| ip -6 route del vrf v$rp2 2001:db8:1::/64 |
| |
| ip route del vrf v$rp2 198.51.100.0/24 |
| |
| __simple_if_fini $rp22 192.0.2.18/28 2001:db8:3::2/64 |
| __simple_if_fini $rp21 192.0.2.2/28 2001:db8:2::2/64 |
| simple_if_fini $rp2 203.0.113.1/24 2001:db8:4::1/64 |
| } |
| |
| h2_create() |
| { |
| simple_if_init $h2 203.0.113.2/24 2001:db8:4::2/64 |
| ip route add vrf v$h2 default via 203.0.113.1 dev $h2 |
| ip -6 route add vrf v$h2 default via 2001:db8:4::1 dev $h2 |
| } |
| |
| h2_destroy() |
| { |
| ip -6 route del vrf v$h2 default |
| ip route del vrf v$h2 default |
| simple_if_fini $h2 203.0.113.2/24 2001:db8:4::2/64 |
| } |
| |
| setup_prepare() |
| { |
| h1=${NETIFS[p1]} |
| |
| rp1=${NETIFS[p2]} |
| |
| rp11=${NETIFS[p3]} |
| rp21=${NETIFS[p4]} |
| |
| rp12=${NETIFS[p5]} |
| rp22=${NETIFS[p6]} |
| |
| rp2=${NETIFS[p7]} |
| |
| h2=${NETIFS[p8]} |
| |
| vrf_prepare |
| h1_create |
| sw1_create |
| sw2_create |
| h2_create |
| |
| forwarding_enable |
| } |
| |
| cleanup() |
| { |
| pre_cleanup |
| |
| forwarding_restore |
| |
| h2_destroy |
| sw2_destroy |
| sw1_destroy |
| h1_destroy |
| vrf_cleanup |
| } |
| |
| ping_ipv4() |
| { |
| ping_test $h1 203.0.113.2 |
| } |
| |
| ping_ipv6() |
| { |
| ping6_test $h1 2001:db8:4::2 |
| } |
| |
| send_src_ipv4() |
| { |
| $MZ $h1 -q -p 64 -A "198.51.100.2-198.51.100.253" -B 203.0.113.2 \ |
| -d 1msec -c 50 -t udp "sp=20000,dp=30000" |
| } |
| |
| send_dst_ipv4() |
| { |
| $MZ $h1 -q -p 64 -A 198.51.100.2 -B "203.0.113.2-203.0.113.253" \ |
| -d 1msec -c 50 -t udp "sp=20000,dp=30000" |
| } |
| |
| send_src_udp4() |
| { |
| $MZ $h1 -q -p 64 -A 198.51.100.2 -B 203.0.113.2 \ |
| -d 1msec -t udp "sp=0-32768,dp=30000" |
| } |
| |
| send_dst_udp4() |
| { |
| $MZ $h1 -q -p 64 -A 198.51.100.2 -B 203.0.113.2 \ |
| -d 1msec -t udp "sp=20000,dp=0-32768" |
| } |
| |
| send_src_ipv6() |
| { |
| $MZ -6 $h1 -q -p 64 -A "2001:db8:1::2-2001:db8:1::fd" -B 2001:db8:4::2 \ |
| -d 1msec -c 50 -t udp "sp=20000,dp=30000" |
| } |
| |
| send_dst_ipv6() |
| { |
| $MZ -6 $h1 -q -p 64 -A 2001:db8:1::2 -B "2001:db8:4::2-2001:db8:4::fd" \ |
| -d 1msec -c 50 -t udp "sp=20000,dp=30000" |
| } |
| |
| send_flowlabel() |
| { |
| # Generate 16384 echo requests, each with a random flow label. |
| for _ in $(seq 1 16384); do |
| ip vrf exec v$h1 \ |
| $PING6 2001:db8:4::2 -F 0 -c 1 -q >/dev/null 2>&1 |
| done |
| } |
| |
| send_src_udp6() |
| { |
| $MZ -6 $h1 -q -p 64 -A 2001:db8:1::2 -B 2001:db8:4::2 \ |
| -d 1msec -t udp "sp=0-32768,dp=30000" |
| } |
| |
| send_dst_udp6() |
| { |
| $MZ -6 $h1 -q -p 64 -A 2001:db8:1::2 -B 2001:db8:4::2 \ |
| -d 1msec -t udp "sp=20000,dp=0-32768" |
| } |
| |
| custom_hash_test() |
| { |
| local field="$1"; shift |
| local balanced="$1"; shift |
| local send_flows="$@" |
| |
| RET=0 |
| |
| local t0_rp11=$(link_stats_tx_packets_get $rp11) |
| local t0_rp12=$(link_stats_tx_packets_get $rp12) |
| |
| $send_flows |
| |
| local t1_rp11=$(link_stats_tx_packets_get $rp11) |
| local t1_rp12=$(link_stats_tx_packets_get $rp12) |
| |
| local d_rp11=$((t1_rp11 - t0_rp11)) |
| local d_rp12=$((t1_rp12 - t0_rp12)) |
| |
| local diff=$((d_rp12 - d_rp11)) |
| local sum=$((d_rp11 + d_rp12)) |
| |
| local pct=$(echo "$diff / $sum * 100" | bc -l) |
| local is_balanced=$(echo "-20 <= $pct && $pct <= 20" | bc) |
| |
| [[ ( $is_balanced -eq 1 && $balanced == "balanced" ) || |
| ( $is_balanced -eq 0 && $balanced == "unbalanced" ) ]] |
| check_err $? "Expected traffic to be $balanced, but it is not" |
| |
| log_test "Multipath hash field: $field ($balanced)" |
| log_info "Packets sent on path1 / path2: $d_rp11 / $d_rp12" |
| } |
| |
| custom_hash_v4() |
| { |
| log_info "Running IPv4 custom multipath hash tests" |
| |
| sysctl_set net.ipv4.fib_multipath_hash_policy 3 |
| |
| # Prevent the neighbour table from overflowing, as different neighbour |
| # entries will be created on $ol4 when using different destination IPs. |
| sysctl_set net.ipv4.neigh.default.gc_thresh1 1024 |
| sysctl_set net.ipv4.neigh.default.gc_thresh2 1024 |
| sysctl_set net.ipv4.neigh.default.gc_thresh3 1024 |
| |
| sysctl_set net.ipv4.fib_multipath_hash_fields 0x0001 |
| custom_hash_test "Source IP" "balanced" send_src_ipv4 |
| custom_hash_test "Source IP" "unbalanced" send_dst_ipv4 |
| |
| sysctl_set net.ipv4.fib_multipath_hash_fields 0x0002 |
| custom_hash_test "Destination IP" "balanced" send_dst_ipv4 |
| custom_hash_test "Destination IP" "unbalanced" send_src_ipv4 |
| |
| sysctl_set net.ipv4.fib_multipath_hash_fields 0x0010 |
| custom_hash_test "Source port" "balanced" send_src_udp4 |
| custom_hash_test "Source port" "unbalanced" send_dst_udp4 |
| |
| sysctl_set net.ipv4.fib_multipath_hash_fields 0x0020 |
| custom_hash_test "Destination port" "balanced" send_dst_udp4 |
| custom_hash_test "Destination port" "unbalanced" send_src_udp4 |
| |
| sysctl_restore net.ipv4.neigh.default.gc_thresh3 |
| sysctl_restore net.ipv4.neigh.default.gc_thresh2 |
| sysctl_restore net.ipv4.neigh.default.gc_thresh1 |
| |
| sysctl_restore net.ipv4.fib_multipath_hash_policy |
| } |
| |
| custom_hash_v6() |
| { |
| log_info "Running IPv6 custom multipath hash tests" |
| |
| sysctl_set net.ipv6.fib_multipath_hash_policy 3 |
| |
| # Prevent the neighbour table from overflowing, as different neighbour |
| # entries will be created on $ol4 when using different destination IPs. |
| sysctl_set net.ipv6.neigh.default.gc_thresh1 1024 |
| sysctl_set net.ipv6.neigh.default.gc_thresh2 1024 |
| sysctl_set net.ipv6.neigh.default.gc_thresh3 1024 |
| |
| sysctl_set net.ipv6.fib_multipath_hash_fields 0x0001 |
| custom_hash_test "Source IP" "balanced" send_src_ipv6 |
| custom_hash_test "Source IP" "unbalanced" send_dst_ipv6 |
| |
| sysctl_set net.ipv6.fib_multipath_hash_fields 0x0002 |
| custom_hash_test "Destination IP" "balanced" send_dst_ipv6 |
| custom_hash_test "Destination IP" "unbalanced" send_src_ipv6 |
| |
| sysctl_set net.ipv6.fib_multipath_hash_fields 0x0008 |
| custom_hash_test "Flowlabel" "balanced" send_flowlabel |
| custom_hash_test "Flowlabel" "unbalanced" send_src_ipv6 |
| |
| sysctl_set net.ipv6.fib_multipath_hash_fields 0x0010 |
| custom_hash_test "Source port" "balanced" send_src_udp6 |
| custom_hash_test "Source port" "unbalanced" send_dst_udp6 |
| |
| sysctl_set net.ipv6.fib_multipath_hash_fields 0x0020 |
| custom_hash_test "Destination port" "balanced" send_dst_udp6 |
| custom_hash_test "Destination port" "unbalanced" send_src_udp6 |
| |
| sysctl_restore net.ipv6.neigh.default.gc_thresh3 |
| sysctl_restore net.ipv6.neigh.default.gc_thresh2 |
| sysctl_restore net.ipv6.neigh.default.gc_thresh1 |
| |
| sysctl_restore net.ipv6.fib_multipath_hash_policy |
| } |
| |
| custom_hash() |
| { |
| # Test that when the hash policy is set to custom, traffic is |
| # distributed only according to the fields set in the |
| # fib_multipath_hash_fields sysctl. |
| # |
| # Each time set a different field and make sure traffic is only |
| # distributed when the field is changed in the packet stream. |
| custom_hash_v4 |
| custom_hash_v6 |
| } |
| |
| trap cleanup EXIT |
| |
| setup_prepare |
| setup_wait |
| tests_run |
| |
| exit $EXIT_STATUS |
