#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# Test devlink-trap policer functionality over mlxsw.
# +---------------------------------+
# | H1 (vrf) |
# | + $h1 |
# | | 192.0.2.1/24 |
# | | |
# | | default via 192.0.2.2 |
# +----|----------------------------+
# |
# +----|----------------------------------------------------------------------+
# | SW | |
# | + $rp1 |
# | 192.0.2.2/24 |
# | |
# | 198.51.100.2/24 |
# | + $rp2 |
# | | |
# +----|----------------------------------------------------------------------+
# |
# +----|----------------------------+
# | | default via 198.51.100.2 |
# | | |
# | | 198.51.100.1/24 |
# | + $h2 |
# | H2 (vrf) |
# +---------------------------------+
lib_dir=$(dirname $0)/../../../net/forwarding
ALL_TESTS="
rate_limits_test
burst_limits_test
rate_test
burst_test
"
NUM_NETIFS=4
source $lib_dir/tc_common.sh
source $lib_dir/lib.sh
source $lib_dir/devlink_lib.sh
h1_create()
{
simple_if_init $h1 192.0.2.1/24
mtu_set $h1 10000
ip -4 route add default vrf v$h1 nexthop via 192.0.2.2
}
h1_destroy()
{
ip -4 route del default vrf v$h1 nexthop via 192.0.2.2
mtu_restore $h1
simple_if_fini $h1 192.0.2.1/24
}
h2_create()
{
simple_if_init $h2 198.51.100.1/24
mtu_set $h2 10000
ip -4 route add default vrf v$h2 nexthop via 198.51.100.2
}
h2_destroy()
{
ip -4 route del default vrf v$h2 nexthop via 198.51.100.2
mtu_restore $h2
simple_if_fini $h2 198.51.100.1/24
}
router_create()
{
ip link set dev $rp1 up
ip link set dev $rp2 up
__addr_add_del $rp1 add 192.0.2.2/24
__addr_add_del $rp2 add 198.51.100.2/24
mtu_set $rp1 10000
mtu_set $rp2 10000
ip -4 route add blackhole 198.51.100.100
devlink trap set $DEVLINK_DEV trap blackhole_route action trap
}
router_destroy()
{
devlink trap set $DEVLINK_DEV trap blackhole_route action drop
ip -4 route del blackhole 198.51.100.100
mtu_restore $rp2
mtu_restore $rp1
__addr_add_del $rp2 del 198.51.100.2/24
__addr_add_del $rp1 del 192.0.2.2/24
ip link set dev $rp2 down
ip link set dev $rp1 down
}
setup_prepare()
{
h1=${NETIFS[p1]}
rp1=${NETIFS[p2]}
rp2=${NETIFS[p3]}
h2=${NETIFS[p4]}
rp1_mac=$(mac_get $rp1)
vrf_prepare
h1_create
h2_create
router_create
}
cleanup()
{
pre_cleanup
router_destroy
h2_destroy
h1_destroy
vrf_cleanup
# Reload to ensure devlink-trap settings are back to default.
devlink_reload
}
rate_limits_test()
{
RET=0
devlink trap policer set $DEVLINK_DEV policer 1 rate 0 &> /dev/null
check_fail $? "Policer rate was changed to rate lower than limit"
devlink trap policer set $DEVLINK_DEV policer 1 \
rate 2000000001 &> /dev/null
check_fail $? "Policer rate was changed to rate higher than limit"
devlink trap policer set $DEVLINK_DEV policer 1 rate 1
check_err $? "Failed to set policer rate to minimum"
devlink trap policer set $DEVLINK_DEV policer 1 rate 2000000000
check_err $? "Failed to set policer rate to maximum"
log_test "Trap policer rate limits"
}
burst_limits_test()
{
RET=0
devlink trap policer set $DEVLINK_DEV policer 1 burst 0 &> /dev/null
check_fail $? "Policer burst size was changed to 0"
devlink trap policer set $DEVLINK_DEV policer 1 burst 17 &> /dev/null
check_fail $? "Policer burst size was changed to burst size that is not power of 2"
devlink trap policer set $DEVLINK_DEV policer 1 burst 8 &> /dev/null
check_fail $? "Policer burst size was changed to burst size lower than limit"
devlink trap policer set $DEVLINK_DEV policer 1 \
burst $((2**25)) &> /dev/null
check_fail $? "Policer burst size was changed to burst size higher than limit"
devlink trap policer set $DEVLINK_DEV policer 1 burst 16
check_err $? "Failed to set policer burst size to minimum"
devlink trap policer set $DEVLINK_DEV policer 1 burst $((2**24))
check_err $? "Failed to set policer burst size to maximum"
log_test "Trap policer burst size limits"
}
trap_rate_get()
{
local t0 t1
t0=$(devlink_trap_rx_packets_get blackhole_route)
sleep 10
t1=$(devlink_trap_rx_packets_get blackhole_route)
echo $(((t1 - t0) / 10))
}
policer_drop_rate_get()
{
local id=$1; shift
local t0 t1
t0=$(devlink_trap_policer_rx_dropped_get $id)
sleep 10
t1=$(devlink_trap_policer_rx_dropped_get $id)
echo $(((t1 - t0) / 10))
}
__rate_test()
{
local rate pct drop_rate
local id=$1; shift
RET=0
devlink trap policer set $DEVLINK_DEV policer $id rate 1000 burst 512
devlink trap group set $DEVLINK_DEV group l3_drops policer $id
# Send packets at highest possible rate and make sure they are dropped
# by the policer. Make sure measured received rate is about 1000 pps
log_info "=== Tx rate: Highest, Policer rate: 1000 pps ==="
start_traffic $h1 192.0.2.1 198.51.100.100 $rp1_mac
sleep 5 # Take measurements when rate is stable
rate=$(trap_rate_get)
pct=$((100 * (rate - 1000) / 1000))
((-10 <= pct && pct <= 10))
check_err $? "Expected rate 1000 pps, got $rate pps, which is $pct% off. Required accuracy is +-10%"
log_info "Expected rate 1000 pps, measured rate $rate pps"
drop_rate=$(policer_drop_rate_get $id)
(( drop_rate > 0 ))
check_err $? "Expected non-zero policer drop rate, got 0"
log_info "Measured policer drop rate of $drop_rate pps"
stop_traffic
# Send packets at a rate of 1000 pps and make sure they are not dropped
# by the policer
log_info "=== Tx rate: 1000 pps, Policer rate: 1000 pps ==="
start_traffic $h1 192.0.2.1 198.51.100.100 $rp1_mac -d 1msec
sleep 5 # Take measurements when rate is stable
drop_rate=$(policer_drop_rate_get $id)
(( drop_rate == 0 ))
check_err $? "Expected zero policer drop rate, got a drop rate of $drop_rate pps"
log_info "Measured policer drop rate of $drop_rate pps"
stop_traffic
# Unbind the policer and send packets at highest possible rate. Make
# sure they are not dropped by the policer and that the measured
# received rate is higher than 1000 pps
log_info "=== Tx rate: Highest, Policer rate: No policer ==="
devlink trap group set $DEVLINK_DEV group l3_drops nopolicer
start_traffic $h1 192.0.2.1 198.51.100.100 $rp1_mac
rate=$(trap_rate_get)
(( rate > 1000 ))
check_err $? "Expected rate higher than 1000 pps, got $rate pps"
log_info "Measured rate $rate pps"
drop_rate=$(policer_drop_rate_get $id)
(( drop_rate == 0 ))
check_err $? "Expected zero policer drop rate, got a drop rate of $drop_rate pps"
log_info "Measured policer drop rate of $drop_rate pps"
stop_traffic
log_test "Trap policer rate"
}
rate_test()
{
local last_policer=$(devlink -j -p trap policer show |
jq '[.[]["'$DEVLINK_DEV'"][].policer] | max')
log_info "Running rate test for policer 1"
__rate_test 1
log_info "Running rate test for policer $((last_policer / 2))"
__rate_test $((last_policer / 2))
log_info "Running rate test for policer $last_policer"
__rate_test $last_policer
}
__burst_test()
{
local t0_rx t0_drop t1_rx t1_drop rx drop
local id=$1; shift
RET=0
devlink trap policer set $DEVLINK_DEV policer $id rate 1000 burst 512
devlink trap group set $DEVLINK_DEV group l3_drops policer $id
# Send a burst of 16 packets and make sure that 16 are received
# and that none are dropped by the policer
log_info "=== Tx burst size: 16, Policer burst size: 512 ==="
t0_rx=$(devlink_trap_rx_packets_get blackhole_route)
t0_drop=$(devlink_trap_policer_rx_dropped_get $id)
start_traffic $h1 192.0.2.1 198.51.100.100 $rp1_mac -c 16
t1_rx=$(devlink_trap_rx_packets_get blackhole_route)
t1_drop=$(devlink_trap_policer_rx_dropped_get $id)
rx=$((t1_rx - t0_rx))
(( rx == 16 ))
check_err $? "Expected burst size of 16 packets, got $rx packets"
log_info "Expected burst size of 16 packets, measured burst size of $rx packets"
drop=$((t1_drop - t0_drop))
(( drop == 0 ))
check_err $? "Expected zero policer drops, got $drop"
log_info "Measured policer drops of $drop packets"
# Unbind the policer and send a burst of 64 packets. Make sure that
# 64 packets are received and that none are dropped by the policer
log_info "=== Tx burst size: 64, Policer burst size: No policer ==="
devlink trap group set $DEVLINK_DEV group l3_drops nopolicer
t0_rx=$(devlink_trap_rx_packets_get blackhole_route)
t0_drop=$(devlink_trap_policer_rx_dropped_get $id)
start_traffic $h1 192.0.2.1 198.51.100.100 $rp1_mac -c 64
t1_rx=$(devlink_trap_rx_packets_get blackhole_route)
t1_drop=$(devlink_trap_policer_rx_dropped_get $id)
rx=$((t1_rx - t0_rx))
(( rx == 64 ))
check_err $? "Expected burst size of 64 packets, got $rx packets"
log_info "Expected burst size of 64 packets, measured burst size of $rx packets"
drop=$((t1_drop - t0_drop))
(( drop == 0 ))
check_err $? "Expected zero policer drops, got $drop"
log_info "Measured policer drops of $drop packets"
log_test "Trap policer burst size"
}
burst_test()
{
local last_policer=$(devlink -j -p trap policer show |
jq '[.[]["'$DEVLINK_DEV'"][].policer] | max')
log_info "Running burst test for policer 1"
__burst_test 1
log_info "Running burst test for policer $((last_policer / 2))"
__burst_test $((last_policer / 2))
log_info "Running burst test for policer $last_policer"
__burst_test $last_policer
}
trap cleanup EXIT
setup_prepare
setup_wait
tests_run
exit $EXIT_STATUS
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