diff options
Diffstat (limited to 'tools/testing/selftests/net/forwarding/gre_custom_multipath_hash.sh')
| -rwxr-xr-x | tools/testing/selftests/net/forwarding/gre_custom_multipath_hash.sh | 464 |
1 files changed, 464 insertions, 0 deletions
diff --git a/tools/testing/selftests/net/forwarding/gre_custom_multipath_hash.sh b/tools/testing/selftests/net/forwarding/gre_custom_multipath_hash.sh new file mode 100755 index 000000000000..9788bd0f6e8b --- /dev/null +++ b/tools/testing/selftests/net/forwarding/gre_custom_multipath_hash.sh @@ -0,0 +1,464 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Test traffic distribution when there are multiple paths between an IPv4 GRE +# tunnel. The tunnel carries IPv4 and IPv6 traffic between multiple hosts. +# Multiple routes are in the underlay network. With the default multipath +# policy, SW2 will only look at the outer IP addresses, hence only a single +# route would be used. +# +# +--------------------------------+ +# | H1 | +# | $h1 + | +# | 198.51.100.{2-253}/24 | | +# | 2001:db8:1::{2-fd}/64 | | +# +-------------------------|------+ +# | +# +-------------------------|------------------+ +# | SW1 | | +# | $ol1 + | +# | 198.51.100.1/24 | +# | 2001:db8:1::1/64 | +# | | +# | + g1 (gre) | +# | loc=192.0.2.1 | +# | rem=192.0.2.2 --. | +# | tos=inherit | | +# | v | +# | + $ul1 | +# | | 192.0.2.17/28 | +# +---------------------|----------------------+ +# | +# +---------------------|----------------------+ +# | SW2 | | +# | $ul21 + | +# | 192.0.2.18/28 | | +# | | | +# ! __________________+___ | +# | / \ | +# | | | | +# | + $ul22.111 (vlan) + $ul22.222 (vlan) | +# | | 192.0.2.33/28 | 192.0.2.49/28 | +# | | | | +# +--|----------------------|------------------+ +# | | +# +--|----------------------|------------------+ +# | | | | +# | + $ul32.111 (vlan) + $ul32.222 (vlan) | +# | | 192.0.2.34/28 | 192.0.2.50/28 | +# | | | | +# | \__________________+___/ | +# | | | +# | | | +# | $ul31 + | +# | 192.0.2.65/28 | SW3 | +# +---------------------|----------------------+ +# | +# +---------------------|----------------------+ +# | + $ul4 | +# | ^ 192.0.2.66/28 | +# | | | +# | + g2 (gre) | | +# | loc=192.0.2.2 | | +# | rem=192.0.2.1 --' | +# | tos=inherit | +# | | +# | $ol4 + | +# | 203.0.113.1/24 | | +# | 2001:db8:2::1/64 | SW4 | +# +-------------------------|------------------+ +# | +# +-------------------------|------+ +# | | | +# | $h2 + | +# | 203.0.113.{2-253}/24 | +# | 2001:db8:2::{2-fd}/64 H2 | +# +--------------------------------+ + +ALL_TESTS=" + ping_ipv4 + ping_ipv6 + custom_hash +" + +NUM_NETIFS=10 +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 $ol1 198.51.100.1/24 2001:db8:1::1/64 + __simple_if_init $ul1 v$ol1 192.0.2.17/28 + + tunnel_create g1 gre 192.0.2.1 192.0.2.2 tos inherit dev v$ol1 + __simple_if_init g1 v$ol1 192.0.2.1/32 + ip route add vrf v$ol1 192.0.2.2/32 via 192.0.2.18 + + ip route add vrf v$ol1 203.0.113.0/24 dev g1 + ip -6 route add vrf v$ol1 2001:db8:2::/64 dev g1 +} + +sw1_destroy() +{ + ip -6 route del vrf v$ol1 2001:db8:2::/64 + ip route del vrf v$ol1 203.0.113.0/24 + + ip route del vrf v$ol1 192.0.2.2/32 + __simple_if_fini g1 192.0.2.1/32 + tunnel_destroy g1 + + __simple_if_fini $ul1 192.0.2.17/28 + simple_if_fini $ol1 198.51.100.1/24 2001:db8:1::1/64 +} + +sw2_create() +{ + simple_if_init $ul21 192.0.2.18/28 + __simple_if_init $ul22 v$ul21 + vlan_create $ul22 111 v$ul21 192.0.2.33/28 + vlan_create $ul22 222 v$ul21 192.0.2.49/28 + + ip route add vrf v$ul21 192.0.2.1/32 via 192.0.2.17 + ip route add vrf v$ul21 192.0.2.2/32 \ + nexthop via 192.0.2.34 \ + nexthop via 192.0.2.50 +} + +sw2_destroy() +{ + ip route del vrf v$ul21 192.0.2.2/32 + ip route del vrf v$ul21 192.0.2.1/32 + + vlan_destroy $ul22 222 + vlan_destroy $ul22 111 + __simple_if_fini $ul22 + simple_if_fini $ul21 192.0.2.18/28 +} + +sw3_create() +{ + simple_if_init $ul31 192.0.2.65/28 + __simple_if_init $ul32 v$ul31 + vlan_create $ul32 111 v$ul31 192.0.2.34/28 + vlan_create $ul32 222 v$ul31 192.0.2.50/28 + + ip route add vrf v$ul31 192.0.2.2/32 via 192.0.2.66 + ip route add vrf v$ul31 192.0.2.1/32 \ + nexthop via 192.0.2.33 \ + nexthop via 192.0.2.49 + + tc qdisc add dev $ul32 clsact + tc filter add dev $ul32 ingress pref 111 prot 802.1Q \ + flower vlan_id 111 action pass + tc filter add dev $ul32 ingress pref 222 prot 802.1Q \ + flower vlan_id 222 action pass +} + +sw3_destroy() +{ + tc qdisc del dev $ul32 clsact + + ip route del vrf v$ul31 192.0.2.1/32 + ip route del vrf v$ul31 192.0.2.2/32 + + vlan_destroy $ul32 222 + vlan_destroy $ul32 111 + __simple_if_fini $ul32 + simple_if_fini $ul31 192.0.2.65/28 +} + +sw4_create() +{ + simple_if_init $ol4 203.0.113.1/24 2001:db8:2::1/64 + __simple_if_init $ul4 v$ol4 192.0.2.66/28 + + tunnel_create g2 gre 192.0.2.2 192.0.2.1 tos inherit dev v$ol4 + __simple_if_init g2 v$ol4 192.0.2.2/32 + ip route add vrf v$ol4 192.0.2.1/32 via 192.0.2.65 + + ip route add vrf v$ol4 198.51.100.0/24 dev g2 + ip -6 route add vrf v$ol4 2001:db8:1::/64 dev g2 +} + +sw4_destroy() +{ + ip -6 route del vrf v$ol4 2001:db8:1::/64 + ip route del vrf v$ol4 198.51.100.0/24 + + ip route del vrf v$ol4 192.0.2.1/32 + __simple_if_fini g2 192.0.2.2/32 + tunnel_destroy g2 + + __simple_if_fini $ul4 192.0.2.66/28 + simple_if_fini $ol4 203.0.113.1/24 2001:db8:2::1/64 +} + +h2_create() +{ + simple_if_init $h2 203.0.113.2/24 2001:db8:2::2/64 + ip route add vrf v$h2 default via 203.0.113.1 dev $h2 + ip -6 route add vrf v$h2 default via 2001:db8:2::1 dev $h2 +} + +h2_destroy() +{ + ip -6 route del vrf v$h2 default + ip route del vrf v$h2 default + simple_if_fini $h2 203.0.113.2/24 2001:db8:2::2/64 +} + +setup_prepare() +{ + h1=${NETIFS[p1]} + + ol1=${NETIFS[p2]} + ul1=${NETIFS[p3]} + + ul21=${NETIFS[p4]} + ul22=${NETIFS[p5]} + + ul32=${NETIFS[p6]} + ul31=${NETIFS[p7]} + + ul4=${NETIFS[p8]} + ol4=${NETIFS[p9]} + + h2=${NETIFS[p10]} + + vrf_prepare + h1_create + sw1_create + sw2_create + sw3_create + sw4_create + h2_create + + forwarding_enable +} + +cleanup() +{ + pre_cleanup + + forwarding_restore + + h2_destroy + sw4_destroy + sw3_destroy + sw2_destroy + sw1_destroy + h1_destroy + vrf_cleanup +} + +ping_ipv4() +{ + ping_test $h1 203.0.113.2 +} + +ping_ipv6() +{ + ping6_test $h1 2001:db8:2::2 +} + +send_src_ipv4() +{ + ip vrf exec v$h1 $MZ $h1 -q -p 64 \ + -A "198.51.100.2-198.51.100.253" -B 203.0.113.2 \ + -d $MZ_DELAY -c 50 -t udp "sp=20000,dp=30000" +} + +send_dst_ipv4() +{ + ip vrf exec v$h1 $MZ $h1 -q -p 64 \ + -A 198.51.100.2 -B "203.0.113.2-203.0.113.253" \ + -d $MZ_DELAY -c 50 -t udp "sp=20000,dp=30000" +} + +send_src_udp4() +{ + ip vrf exec v$h1 $MZ $h1 -q -p 64 \ + -A 198.51.100.2 -B 203.0.113.2 \ + -d $MZ_DELAY -t udp "sp=0-32768,dp=30000" +} + +send_dst_udp4() +{ + ip vrf exec v$h1 $MZ $h1 -q -p 64 \ + -A 198.51.100.2 -B 203.0.113.2 \ + -d $MZ_DELAY -t udp "sp=20000,dp=0-32768" +} + +send_src_ipv6() +{ + ip vrf exec v$h1 $MZ -6 $h1 -q -p 64 \ + -A "2001:db8:1::2-2001:db8:1::fd" -B 2001:db8:2::2 \ + -d $MZ_DELAY -c 50 -t udp "sp=20000,dp=30000" +} + +send_dst_ipv6() +{ + ip vrf exec v$h1 $MZ -6 $h1 -q -p 64 \ + -A 2001:db8:1::2 -B "2001:db8:2::2-2001:db8:2::fd" \ + -d $MZ_DELAY -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 \ + $PING6 2001:db8:2::2 -F 0 -c 1 -q >/dev/null 2>&1 + done +} + +send_src_udp6() +{ + ip vrf exec v$h1 $MZ -6 $h1 -q -p 64 \ + -A 2001:db8:1::2 -B 2001:db8:2::2 \ + -d $MZ_DELAY -t udp "sp=0-32768,dp=30000" +} + +send_dst_udp6() +{ + ip vrf exec v$h1 $MZ -6 $h1 -q -p 64 \ + -A 2001:db8:1::2 -B 2001:db8:2::2 \ + -d $MZ_DELAY -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_111=$(tc_rule_stats_get $ul32 111 ingress) + local t0_222=$(tc_rule_stats_get $ul32 222 ingress) + + $send_flows + + local t1_111=$(tc_rule_stats_get $ul32 111 ingress) + local t1_222=$(tc_rule_stats_get $ul32 222 ingress) + + local d111=$((t1_111 - t0_111)) + local d222=$((t1_222 - t0_222)) + + local diff=$((d222 - d111)) + local sum=$((d111 + d222)) + + local pct=$(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: $d111 / $d222" +} + +custom_hash_v4() +{ + log_info "Running IPv4 overlay custom multipath hash tests" + + # 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 0x0040 + custom_hash_test "Inner source IP" "balanced" send_src_ipv4 + custom_hash_test "Inner source IP" "unbalanced" send_dst_ipv4 + + sysctl_set net.ipv4.fib_multipath_hash_fields 0x0080 + custom_hash_test "Inner destination IP" "balanced" send_dst_ipv4 + custom_hash_test "Inner destination IP" "unbalanced" send_src_ipv4 + + sysctl_set net.ipv4.fib_multipath_hash_fields 0x0400 + custom_hash_test "Inner source port" "balanced" send_src_udp4 + custom_hash_test "Inner source port" "unbalanced" send_dst_udp4 + + sysctl_set net.ipv4.fib_multipath_hash_fields 0x0800 + custom_hash_test "Inner destination port" "balanced" send_dst_udp4 + custom_hash_test "Inner 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 +} + +custom_hash_v6() +{ + log_info "Running IPv6 overlay custom multipath hash tests" + + # 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.ipv4.fib_multipath_hash_fields 0x0040 + custom_hash_test "Inner source IP" "balanced" send_src_ipv6 + custom_hash_test "Inner source IP" "unbalanced" send_dst_ipv6 + + sysctl_set net.ipv4.fib_multipath_hash_fields 0x0080 + custom_hash_test "Inner destination IP" "balanced" send_dst_ipv6 + custom_hash_test "Inner destination IP" "unbalanced" send_src_ipv6 + + sysctl_set net.ipv4.fib_multipath_hash_fields 0x0200 + custom_hash_test "Inner flowlabel" "balanced" send_flowlabel + custom_hash_test "Inner flowlabel" "unbalanced" send_src_ipv6 + + sysctl_set net.ipv4.fib_multipath_hash_fields 0x0400 + custom_hash_test "Inner source port" "balanced" send_src_udp6 + custom_hash_test "Inner source port" "unbalanced" send_dst_udp6 + + sysctl_set net.ipv4.fib_multipath_hash_fields 0x0800 + custom_hash_test "Inner destination port" "balanced" send_dst_udp6 + custom_hash_test "Inner 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 +} + +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. + + sysctl_set net.ipv4.fib_multipath_hash_policy 3 + + custom_hash_v4 + custom_hash_v6 + + sysctl_restore net.ipv4.fib_multipath_hash_policy +} + +trap cleanup EXIT + +setup_prepare +setup_wait +tests_run + +exit $EXIT_STATUS |