selftests: mlxsw: Add test cases for devlink-trap policers
Add test cases that verify that each registered packet trap policer: * Honors that imposed limitations of rate and burst size * Able to police trapped packets to the specified rate * Able to police trapped packets to the specified burst size * Able to be unbound from its trap group Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel
David S. Miller
parent
39defcbba0
commit
9f3e63c5d6
384
tools/testing/selftests/drivers/net/mlxsw/devlink_trap_policer.sh
Executable file
384
tools/testing/selftests/drivers/net/mlxsw/devlink_trap_policer.sh
Executable file
@ -0,0 +1,384 @@
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# Test devlink-trap policer functionality over mlxsw.
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# +---------------------------------+
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# | H1 (vrf) |
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# | + $h1 |
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# | | 192.0.2.1/24 |
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# | | |
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# | | default via 192.0.2.2 |
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# +----|----------------------------+
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# |
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# +----|----------------------------------------------------------------------+
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# | SW | |
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# | + $rp1 |
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# | 192.0.2.2/24 |
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# | |
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# | 198.51.100.2/24 |
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# | + $rp2 |
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# | | |
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# +----|----------------------------------------------------------------------+
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# |
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# +----|----------------------------+
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# | | default via 198.51.100.2 |
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# | | |
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# | | 198.51.100.1/24 |
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# | + $h2 |
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# | H2 (vrf) |
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# +---------------------------------+
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lib_dir=$(dirname $0)/../../../net/forwarding
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ALL_TESTS="
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rate_limits_test
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burst_limits_test
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rate_test
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burst_test
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"
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NUM_NETIFS=4
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source $lib_dir/tc_common.sh
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source $lib_dir/lib.sh
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source $lib_dir/devlink_lib.sh
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h1_create()
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{
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simple_if_init $h1 192.0.2.1/24
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mtu_set $h1 10000
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ip -4 route add default vrf v$h1 nexthop via 192.0.2.2
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}
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h1_destroy()
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{
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ip -4 route del default vrf v$h1 nexthop via 192.0.2.2
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mtu_restore $h1
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simple_if_fini $h1 192.0.2.1/24
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}
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h2_create()
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{
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simple_if_init $h2 198.51.100.1/24
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mtu_set $h2 10000
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ip -4 route add default vrf v$h2 nexthop via 198.51.100.2
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}
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h2_destroy()
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{
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ip -4 route del default vrf v$h2 nexthop via 198.51.100.2
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mtu_restore $h2
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simple_if_fini $h2 198.51.100.1/24
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}
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router_create()
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{
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ip link set dev $rp1 up
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ip link set dev $rp2 up
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__addr_add_del $rp1 add 192.0.2.2/24
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__addr_add_del $rp2 add 198.51.100.2/24
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mtu_set $rp1 10000
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mtu_set $rp2 10000
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ip -4 route add blackhole 198.51.100.100
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devlink trap set $DEVLINK_DEV trap blackhole_route action trap
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}
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router_destroy()
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{
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devlink trap set $DEVLINK_DEV trap blackhole_route action drop
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ip -4 route del blackhole 198.51.100.100
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mtu_restore $rp2
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mtu_restore $rp1
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__addr_add_del $rp2 del 198.51.100.2/24
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__addr_add_del $rp1 del 192.0.2.2/24
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ip link set dev $rp2 down
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ip link set dev $rp1 down
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}
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setup_prepare()
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{
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h1=${NETIFS[p1]}
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rp1=${NETIFS[p2]}
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rp2=${NETIFS[p3]}
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h2=${NETIFS[p4]}
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rp1_mac=$(mac_get $rp1)
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vrf_prepare
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h1_create
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h2_create
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router_create
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}
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cleanup()
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{
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pre_cleanup
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router_destroy
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h2_destroy
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h1_destroy
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vrf_cleanup
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# Reload to ensure devlink-trap settings are back to default.
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devlink_reload
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}
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rate_limits_test()
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{
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RET=0
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devlink trap policer set $DEVLINK_DEV policer 1 rate 0 &> /dev/null
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check_fail $? "Policer rate was changed to rate lower than limit"
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devlink trap policer set $DEVLINK_DEV policer 1 \
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rate 2000000001 &> /dev/null
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check_fail $? "Policer rate was changed to rate higher than limit"
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devlink trap policer set $DEVLINK_DEV policer 1 rate 1
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check_err $? "Failed to set policer rate to minimum"
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devlink trap policer set $DEVLINK_DEV policer 1 rate 2000000000
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check_err $? "Failed to set policer rate to maximum"
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log_test "Trap policer rate limits"
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}
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burst_limits_test()
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{
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RET=0
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devlink trap policer set $DEVLINK_DEV policer 1 burst 0 &> /dev/null
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check_fail $? "Policer burst size was changed to 0"
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devlink trap policer set $DEVLINK_DEV policer 1 burst 17 &> /dev/null
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check_fail $? "Policer burst size was changed to burst size that is not power of 2"
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devlink trap policer set $DEVLINK_DEV policer 1 burst 8 &> /dev/null
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check_fail $? "Policer burst size was changed to burst size lower than limit"
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devlink trap policer set $DEVLINK_DEV policer 1 \
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burst $((2**25)) &> /dev/null
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check_fail $? "Policer burst size was changed to burst size higher than limit"
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devlink trap policer set $DEVLINK_DEV policer 1 burst 16
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check_err $? "Failed to set policer burst size to minimum"
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devlink trap policer set $DEVLINK_DEV policer 1 burst $((2**24))
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check_err $? "Failed to set policer burst size to maximum"
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log_test "Trap policer burst size limits"
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}
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trap_rate_get()
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{
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local t0 t1
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t0=$(devlink_trap_rx_packets_get blackhole_route)
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sleep 10
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t1=$(devlink_trap_rx_packets_get blackhole_route)
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echo $(((t1 - t0) / 10))
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}
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policer_drop_rate_get()
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{
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local id=$1; shift
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local t0 t1
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t0=$(devlink_trap_policer_rx_dropped_get $id)
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sleep 10
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t1=$(devlink_trap_policer_rx_dropped_get $id)
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echo $(((t1 - t0) / 10))
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}
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__rate_test()
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{
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local rate pct drop_rate
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local id=$1; shift
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RET=0
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devlink trap policer set $DEVLINK_DEV policer $id rate 1000 burst 16
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devlink trap group set $DEVLINK_DEV group l3_drops policer $id
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# Send packets at highest possible rate and make sure they are dropped
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# by the policer. Make sure measured received rate is about 1000 pps
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log_info "=== Tx rate: Highest, Policer rate: 1000 pps ==="
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start_traffic $h1 192.0.2.1 198.51.100.100 $rp1_mac
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sleep 5 # Take measurements when rate is stable
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rate=$(trap_rate_get)
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pct=$((100 * (rate - 1000) / 1000))
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((-5 <= pct && pct <= 5))
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check_err $? "Expected rate 1000 pps, got $rate pps, which is $pct% off. Required accuracy is +-5%"
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log_info "Expected rate 1000 pps, measured rate $rate pps"
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drop_rate=$(policer_drop_rate_get $id)
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(( drop_rate > 0 ))
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check_err $? "Expected non-zero policer drop rate, got 0"
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log_info "Measured policer drop rate of $drop_rate pps"
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stop_traffic
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# Send packets at a rate of 1000 pps and make sure they are not dropped
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# by the policer
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log_info "=== Tx rate: 1000 pps, Policer rate: 1000 pps ==="
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start_traffic $h1 192.0.2.1 198.51.100.100 $rp1_mac -d 1msec
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sleep 5 # Take measurements when rate is stable
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drop_rate=$(policer_drop_rate_get $id)
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(( drop_rate == 0 ))
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check_err $? "Expected zero policer drop rate, got a drop rate of $drop_rate pps"
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log_info "Measured policer drop rate of $drop_rate pps"
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stop_traffic
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# Unbind the policer and send packets at highest possible rate. Make
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# sure they are not dropped by the policer and that the measured
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# received rate is higher than 1000 pps
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log_info "=== Tx rate: Highest, Policer rate: No policer ==="
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devlink trap group set $DEVLINK_DEV group l3_drops nopolicer
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start_traffic $h1 192.0.2.1 198.51.100.100 $rp1_mac
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rate=$(trap_rate_get)
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(( rate > 1000 ))
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check_err $? "Expected rate higher than 1000 pps, got $rate pps"
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log_info "Measured rate $rate pps"
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drop_rate=$(policer_drop_rate_get $id)
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(( drop_rate == 0 ))
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check_err $? "Expected zero policer drop rate, got a drop rate of $drop_rate pps"
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log_info "Measured policer drop rate of $drop_rate pps"
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stop_traffic
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log_test "Trap policer rate"
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}
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rate_test()
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{
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local id
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for id in $(devlink_trap_policer_ids_get); do
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echo
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log_info "Running rate test for policer $id"
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__rate_test $id
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done
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}
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__burst_test()
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{
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local t0_rx t0_drop t1_rx t1_drop rx drop
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local id=$1; shift
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RET=0
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devlink trap policer set $DEVLINK_DEV policer $id rate 1000 burst 32
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devlink trap group set $DEVLINK_DEV group l3_drops policer $id
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# Send a burst of 64 packets and make sure that about 32 are received
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# and the rest are dropped by the policer
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log_info "=== Tx burst size: 64, Policer burst size: 32 pps ==="
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t0_rx=$(devlink_trap_rx_packets_get blackhole_route)
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t0_drop=$(devlink_trap_policer_rx_dropped_get $id)
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start_traffic $h1 192.0.2.1 198.51.100.100 $rp1_mac -c 64
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t1_rx=$(devlink_trap_rx_packets_get blackhole_route)
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t1_drop=$(devlink_trap_policer_rx_dropped_get $id)
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rx=$((t1_rx - t0_rx))
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pct=$((100 * (rx - 32) / 32))
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((-20 <= pct && pct <= 20))
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check_err $? "Expected burst size of 32 packets, got $rx packets, which is $pct% off. Required accuracy is +-20%"
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log_info "Expected burst size of 32 packets, measured burst size of $rx packets"
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drop=$((t1_drop - t0_drop))
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(( drop > 0 ))
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check_err $? "Expected non-zero policer drops, got 0"
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log_info "Measured policer drops of $drop packets"
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# Send a burst of 16 packets and make sure that 16 are received
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# and that none are dropped by the policer
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log_info "=== Tx burst size: 16, Policer burst size: 32 pps ==="
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t0_rx=$(devlink_trap_rx_packets_get blackhole_route)
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t0_drop=$(devlink_trap_policer_rx_dropped_get $id)
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start_traffic $h1 192.0.2.1 198.51.100.100 $rp1_mac -c 16
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t1_rx=$(devlink_trap_rx_packets_get blackhole_route)
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t1_drop=$(devlink_trap_policer_rx_dropped_get $id)
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rx=$((t1_rx - t0_rx))
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(( rx == 16 ))
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check_err $? "Expected burst size of 16 packets, got $rx packets"
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log_info "Expected burst size of 16 packets, measured burst size of $rx packets"
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drop=$((t1_drop - t0_drop))
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(( drop == 0 ))
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check_err $? "Expected zero policer drops, got $drop"
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log_info "Measured policer drops of $drop packets"
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# Unbind the policer and send a burst of 64 packets. Make sure that
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# 64 packets are received and that none are dropped by the policer
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log_info "=== Tx burst size: 64, Policer burst size: No policer ==="
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devlink trap group set $DEVLINK_DEV group l3_drops nopolicer
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t0_rx=$(devlink_trap_rx_packets_get blackhole_route)
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t0_drop=$(devlink_trap_policer_rx_dropped_get $id)
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start_traffic $h1 192.0.2.1 198.51.100.100 $rp1_mac -c 64
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t1_rx=$(devlink_trap_rx_packets_get blackhole_route)
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t1_drop=$(devlink_trap_policer_rx_dropped_get $id)
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rx=$((t1_rx - t0_rx))
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(( rx == 64 ))
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check_err $? "Expected burst size of 64 packets, got $rx packets"
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log_info "Expected burst size of 64 packets, measured burst size of $rx packets"
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drop=$((t1_drop - t0_drop))
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(( drop == 0 ))
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check_err $? "Expected zero policer drops, got $drop"
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log_info "Measured policer drops of $drop packets"
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log_test "Trap policer burst size"
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}
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burst_test()
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{
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local id
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for id in $(devlink_trap_policer_ids_get); do
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echo
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log_info "Running burst size test for policer $id"
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__burst_test $id
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done
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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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tests_run
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exit $EXIT_STATUS
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@ -457,6 +457,12 @@ devlink_trap_group_policer_get()
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| jq '.[][][]["policer"]'
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}
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devlink_trap_policer_ids_get()
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{
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devlink -j -p trap policer show \
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| jq '.[]["'$DEVLINK_DEV'"][]["policer"]'
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}
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devlink_port_by_netdev()
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{
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local if_name=$1
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