mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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3d578d8795
Use different weights for the multipath route configured on the first router and check that the different flows generated by the first host are distributed according to the provided weights. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
286 lines
6.5 KiB
Bash
Executable file
286 lines
6.5 KiB
Bash
Executable file
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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NUM_NETIFS=8
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source lib.sh
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h1_create()
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{
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vrf_create "vrf-h1"
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ip link set dev $h1 master vrf-h1
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ip link set dev vrf-h1 up
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ip link set dev $h1 up
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ip address add 192.0.2.2/24 dev $h1
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ip address add 2001:db8:1::2/64 dev $h1
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ip route add 198.51.100.0/24 vrf vrf-h1 nexthop via 192.0.2.1
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ip route add 2001:db8:2::/64 vrf vrf-h1 nexthop via 2001:db8:1::1
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}
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h1_destroy()
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{
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ip route del 2001:db8:2::/64 vrf vrf-h1
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ip route del 198.51.100.0/24 vrf vrf-h1
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ip address del 2001:db8:1::2/64 dev $h1
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ip address del 192.0.2.2/24 dev $h1
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ip link set dev $h1 down
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vrf_destroy "vrf-h1"
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}
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h2_create()
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{
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vrf_create "vrf-h2"
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ip link set dev $h2 master vrf-h2
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ip link set dev vrf-h2 up
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ip link set dev $h2 up
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ip address add 198.51.100.2/24 dev $h2
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ip address add 2001:db8:2::2/64 dev $h2
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ip route add 192.0.2.0/24 vrf vrf-h2 nexthop via 198.51.100.1
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ip route add 2001:db8:1::/64 vrf vrf-h2 nexthop via 2001:db8:2::1
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}
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h2_destroy()
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{
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ip route del 2001:db8:1::/64 vrf vrf-h2
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ip route del 192.0.2.0/24 vrf vrf-h2
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ip address del 2001:db8:2::2/64 dev $h2
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ip address del 198.51.100.2/24 dev $h2
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ip link set dev $h2 down
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vrf_destroy "vrf-h2"
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}
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router1_create()
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{
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vrf_create "vrf-r1"
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ip link set dev $rp11 master vrf-r1
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ip link set dev $rp12 master vrf-r1
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ip link set dev $rp13 master vrf-r1
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ip link set dev vrf-r1 up
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ip link set dev $rp11 up
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ip link set dev $rp12 up
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ip link set dev $rp13 up
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ip address add 192.0.2.1/24 dev $rp11
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ip address add 2001:db8:1::1/64 dev $rp11
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ip address add 169.254.2.12/24 dev $rp12
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ip address add fe80:2::12/64 dev $rp12
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ip address add 169.254.3.13/24 dev $rp13
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ip address add fe80:3::13/64 dev $rp13
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ip route add 198.51.100.0/24 vrf vrf-r1 \
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nexthop via 169.254.2.22 dev $rp12 \
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nexthop via 169.254.3.23 dev $rp13
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ip route add 2001:db8:2::/64 vrf vrf-r1 \
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nexthop via fe80:2::22 dev $rp12 \
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nexthop via fe80:3::23 dev $rp13
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}
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router1_destroy()
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{
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ip route del 2001:db8:2::/64 vrf vrf-r1
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ip route del 198.51.100.0/24 vrf vrf-r1
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ip address del fe80:3::13/64 dev $rp13
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ip address del 169.254.3.13/24 dev $rp13
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ip address del fe80:2::12/64 dev $rp12
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ip address del 169.254.2.12/24 dev $rp12
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ip address del 2001:db8:1::1/64 dev $rp11
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ip address del 192.0.2.1/24 dev $rp11
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ip link set dev $rp13 down
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ip link set dev $rp12 down
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ip link set dev $rp11 down
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vrf_destroy "vrf-r1"
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}
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router2_create()
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{
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vrf_create "vrf-r2"
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ip link set dev $rp21 master vrf-r2
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ip link set dev $rp22 master vrf-r2
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ip link set dev $rp23 master vrf-r2
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ip link set dev vrf-r2 up
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ip link set dev $rp21 up
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ip link set dev $rp22 up
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ip link set dev $rp23 up
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ip address add 198.51.100.1/24 dev $rp21
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ip address add 2001:db8:2::1/64 dev $rp21
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ip address add 169.254.2.22/24 dev $rp22
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ip address add fe80:2::22/64 dev $rp22
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ip address add 169.254.3.23/24 dev $rp23
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ip address add fe80:3::23/64 dev $rp23
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ip route add 192.0.2.0/24 vrf vrf-r2 \
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nexthop via 169.254.2.12 dev $rp22 \
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nexthop via 169.254.3.13 dev $rp23
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ip route add 2001:db8:1::/64 vrf vrf-r2 \
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nexthop via fe80:2::12 dev $rp22 \
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nexthop via fe80:3::13 dev $rp23
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}
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router2_destroy()
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{
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ip route del 2001:db8:1::/64 vrf vrf-r2
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ip route del 192.0.2.0/24 vrf vrf-r2
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ip address del fe80:3::23/64 dev $rp23
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ip address del 169.254.3.23/24 dev $rp23
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ip address del fe80:2::22/64 dev $rp22
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ip address del 169.254.2.22/24 dev $rp22
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ip address del 2001:db8:2::1/64 dev $rp21
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ip address del 198.51.100.1/24 dev $rp21
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ip link set dev $rp23 down
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ip link set dev $rp22 down
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ip link set dev $rp21 down
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vrf_destroy "vrf-r2"
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}
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multipath_eval()
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{
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local weight_rp12=$1
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local weight_rp13=$2
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local packets_rp12=$3
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local packets_rp13=$4
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local weights_ratio packets_ratio diff
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RET=0
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if [[ "$weight_rp12" -gt "$weight_rp13" ]]; then
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weights_ratio=$(echo "scale=2; $weight_rp12 / $weight_rp13" \
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| bc -l)
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packets_ratio=$(echo "scale=2; $packets_rp12 / $packets_rp13" \
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| bc -l)
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else
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weights_ratio=$(echo "scale=2; $weight_rp13 / $weight_rp12" | \
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bc -l)
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packets_ratio=$(echo "scale=2; $packets_rp13 / $packets_rp12" | \
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bc -l)
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fi
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diff=$(echo $weights_ratio - $packets_ratio | bc -l)
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diff=${diff#-}
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test "$(echo "$diff / $weights_ratio > 0.1" | bc -l)" -eq 0
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check_err $? "Too large discrepancy between expected and measured ratios"
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log_test "Multipath"
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log_info "Expected ratio $weights_ratio Measured ratio $packets_ratio"
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}
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multipath4_test()
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{
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local weight_rp12=$1
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local weight_rp13=$2
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local t0_rp12 t0_rp13 t1_rp12 t1_rp13
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local packets_rp12 packets_rp13
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local hash_policy
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# Transmit multiple flows from h1 to h2 and make sure they are
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# distributed between both multipath links (rp12 and rp13)
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# according to the configured weights.
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hash_policy=$(sysctl -n net.ipv4.fib_multipath_hash_policy)
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sysctl -q -w net.ipv4.fib_multipath_hash_policy=1
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ip route replace 198.51.100.0/24 vrf vrf-r1 \
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nexthop via 169.254.2.22 dev $rp12 weight $weight_rp12 \
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nexthop via 169.254.3.23 dev $rp13 weight $weight_rp13
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t0_rp12=$(link_stats_tx_packets_get $rp12)
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t0_rp13=$(link_stats_tx_packets_get $rp13)
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ip vrf exec vrf-h1 $MZ -q -p 64 -A 192.0.2.2 -B 198.51.100.2 \
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-d 1msec -t udp "sp=1024,dp=0-32768"
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t1_rp12=$(link_stats_tx_packets_get $rp12)
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t1_rp13=$(link_stats_tx_packets_get $rp13)
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let "packets_rp12 = $t1_rp12 - $t0_rp12"
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let "packets_rp13 = $t1_rp13 - $t0_rp13"
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multipath_eval $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13
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# Restore settings.
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ip route replace 198.51.100.0/24 vrf vrf-r1 \
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nexthop via 169.254.2.22 dev $rp12 \
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nexthop via 169.254.3.23 dev $rp13
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sysctl -q -w net.ipv4.fib_multipath_hash_policy=$hash_policy
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}
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multipath_test()
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{
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log_info "Running IPv4 multipath tests"
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multipath4_test 1 1
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multipath4_test 2 1
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multipath4_test 11 45
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}
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setup_prepare()
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{
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h1=${NETIFS[p1]}
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rp11=${NETIFS[p2]}
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rp12=${NETIFS[p3]}
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rp22=${NETIFS[p4]}
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rp13=${NETIFS[p5]}
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rp23=${NETIFS[p6]}
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rp21=${NETIFS[p7]}
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h2=${NETIFS[p8]}
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vrf_prepare
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h1_create
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h2_create
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router1_create
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router2_create
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forwarding_enable
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}
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cleanup()
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{
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pre_cleanup
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forwarding_restore
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router2_destroy
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router1_destroy
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h2_destroy
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h1_destroy
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vrf_cleanup
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}
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trap cleanup EXIT
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setup_prepare
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setup_wait
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ping_test $h1 198.51.100.2
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ping6_test $h1 2001:db8:2::2
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multipath_test
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exit $EXIT_STATUS
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