#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# This test is for checking devlink-trap functionality. It makes use of
# netdevsim which implements the required callbacks.
lib_dir=$(dirname $0)/../../../net/forwarding
ALL_TESTS="
init_test
trap_action_test
trap_metadata_test
bad_trap_test
bad_trap_action_test
trap_stats_test
trap_group_action_test
bad_trap_group_test
trap_group_stats_test
trap_policer_test
trap_policer_bind_test
port_del_test
dev_del_test
"
NETDEVSIM_PATH=/sys/bus/netdevsim/
DEV_ADDR=1337
DEV=netdevsim${DEV_ADDR}
DEBUGFS_DIR=/sys/kernel/debug/netdevsim/$DEV/
SLEEP_TIME=1
NETDEV=""
NUM_NETIFS=0
source $lib_dir/lib.sh
DEVLINK_DEV=
source $lib_dir/devlink_lib.sh
DEVLINK_DEV=netdevsim/${DEV}
require_command udevadm
modprobe netdevsim &> /dev/null
if [ ! -d "$NETDEVSIM_PATH" ]; then
echo "SKIP: No netdevsim support"
exit 1
fi
if [ -d "${NETDEVSIM_PATH}/devices/netdevsim${DEV_ADDR}" ]; then
echo "SKIP: Device netdevsim${DEV_ADDR} already exists"
exit 1
fi
check_netdev_down()
{
state=$(cat /sys/class/net/${NETDEV}/flags)
if [ $((state & 1)) -ne 0 ]; then
echo "WARNING: unexpected interface UP, disable NetworkManager?"
ip link set dev $NETDEV down
fi
}
init_test()
{
RET=0
test $(devlink_traps_num_get) -ne 0
check_err $? "No traps were registered"
log_test "Initialization"
}
trap_action_test()
{
local orig_action
local trap_name
local action
RET=0
for trap_name in $(devlink_traps_get); do
# The action of non-drop traps cannot be changed.
if [ $(devlink_trap_type_get $trap_name) = "drop" ]; then
devlink_trap_action_set $trap_name "trap"
action=$(devlink_trap_action_get $trap_name)
if [ $action != "trap" ]; then
check_err 1 "Trap $trap_name did not change action to trap"
fi
devlink_trap_action_set $trap_name "drop"
action=$(devlink_trap_action_get $trap_name)
if [ $action != "drop" ]; then
check_err 1 "Trap $trap_name did not change action to drop"
fi
else
orig_action=$(devlink_trap_action_get $trap_name)
devlink_trap_action_set $trap_name "trap"
action=$(devlink_trap_action_get $trap_name)
if [ $action != $orig_action ]; then
check_err 1 "Trap $trap_name changed action when should not"
fi
devlink_trap_action_set $trap_name "drop"
action=$(devlink_trap_action_get $trap_name)
if [ $action != $orig_action ]; then
check_err 1 "Trap $trap_name changed action when should not"
fi
fi
done
log_test "Trap action"
}
trap_metadata_test()
{
local trap_name
RET=0
for trap_name in $(devlink_traps_get); do
devlink_trap_metadata_test $trap_name "input_port"
check_err $? "Input port not reported as metadata of trap $trap_name"
if [ $trap_name == "ingress_flow_action_drop" ] ||
[ $trap_name == "egress_flow_action_drop" ]; then
devlink_trap_metadata_test $trap_name "flow_action_cookie"
check_err $? "Flow action cookie not reported as metadata of trap $trap_name"
fi
done
log_test "Trap metadata"
}
bad_trap_test()
{
RET=0
devlink_trap_action_set "made_up_trap" "drop"
check_fail $? "Did not get an error for non-existing trap"
log_test "Non-existing trap"
}
bad_trap_action_test()
{
local traps_arr
local trap_name
RET=0
# Pick first trap.
traps_arr=($(devlink_traps_get))
trap_name=${traps_arr[0]}
devlink_trap_action_set $trap_name "made_up_action"
check_fail $? "Did not get an error for non-existing trap action"
log_test "Non-existing trap action"
}
trap_stats_test()
{
local trap_name
RET=0
check_netdev_down
for trap_name in $(devlink_traps_get); do
devlink_trap_stats_idle_test $trap_name
check_err $? "Stats of trap $trap_name not idle when netdev down"
ip link set dev $NETDEV up
if [ $(devlink_trap_type_get $trap_name) = "drop" ]; then
devlink_trap_action_set $trap_name "trap"
devlink_trap_stats_idle_test $trap_name
check_fail $? "Stats of trap $trap_name idle when action is trap"
devlink_trap_action_set $trap_name "drop"
devlink_trap_stats_idle_test $trap_name
check_err $? "Stats of trap $trap_name not idle when action is drop"
echo "y"> $DEBUGFS_DIR/fail_trap_drop_counter_get
devlink -s trap show $DEVLINK_DEV trap $trap_name &> /dev/null
check_fail $? "Managed to read trap (hard dropped) statistics when should not"
echo "n"> $DEBUGFS_DIR/fail_trap_drop_counter_get
devlink -s trap show $DEVLINK_DEV trap $trap_name &> /dev/null
check_err $? "Did not manage to read trap (hard dropped) statistics when should"
devlink_trap_drop_stats_idle_test $trap_name
check_fail $? "Drop stats of trap $trap_name idle when should not"
else
devlink_trap_stats_idle_test $trap_name
check_fail $? "Stats of non-drop trap $trap_name idle when should not"
fi
ip link set dev $NETDEV down
done
log_test "Trap statistics"
}
trap_group_action_test()
{
local curr_group group_name
local trap_name
local trap_type
local action
RET=0
for group_name in $(devlink_trap_groups_get); do
devlink_trap_group_action_set $group_name "trap"
for trap_name in $(devlink_traps_get); do
curr_group=$(devlink_trap_group_get $trap_name)
if [ $curr_group != $group_name ]; then
continue
fi
trap_type=$(devlink_trap_type_get $trap_name)
if [ $trap_type != "drop" ]; then
continue
fi
action=$(devlink_trap_action_get $trap_name)
if [ $action != "trap" ]; then
check_err 1 "Trap $trap_name did not change action to trap"
fi
done
devlink_trap_group_action_set $group_name "drop"
for trap_name in $(devlink_traps_get); do
curr_group=$(devlink_trap_group_get $trap_name)
if [ $curr_group != $group_name ]; then
continue
fi
trap_type=$(devlink_trap_type_get $trap_name)
if [ $trap_type != "drop" ]; then
continue
fi
action=$(devlink_trap_action_get $trap_name)
if [ $action != "drop" ]; then
check_err 1 "Trap $trap_name did not change action to drop"
fi
done
done
log_test "Trap group action"
}
bad_trap_group_test()
{
RET=0
devlink_trap_group_action_set "made_up_trap_group" "drop"
check_fail $? "Did not get an error for non-existing trap group"
log_test "Non-existing trap group"
}
trap_group_stats_test()
{
local group_name
RET=0
check_netdev_down
for group_name in $(devlink_trap_groups_get); do
devlink_trap_group_stats_idle_test $group_name
check_err $? "Stats of trap group $group_name not idle when netdev down"
ip link set dev $NETDEV up
devlink_trap_group_action_set $group_name "trap"
devlink_trap_group_stats_idle_test $group_name
check_fail $? "Stats of trap group $group_name idle when action is trap"
devlink_trap_group_action_set $group_name "drop"
ip link set dev $NETDEV down
done
log_test "Trap group statistics"
}
trap_policer_test()
{
local packets_t0
local packets_t1
RET=0
if [ $(devlink_trap_policers_num_get) -eq 0 ]; then
check_err 1 "Failed to dump policers"
fi
devlink trap policer set $DEVLINK_DEV policer 1337 &> /dev/null
check_fail $? "Did not get an error for setting a non-existing policer"
devlink trap policer show $DEVLINK_DEV policer 1337 &> /dev/null
check_fail $? "Did not get an error for getting a non-existing policer"
devlink trap policer set $DEVLINK_DEV policer 1 rate 2000 burst 16
check_err $? "Failed to set valid parameters for a valid policer"
if [ $(devlink_trap_policer_rate_get 1) -ne 2000 ]; then
check_err 1 "Policer rate was not changed"
fi
if [ $(devlink_trap_policer_burst_get 1) -ne 16 ]; then
check_err 1 "Policer burst size was not changed"
fi
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 9000 &> /dev/null
check_fail $? "Policer rate was changed to rate higher than limit"
devlink trap policer set $DEVLINK_DEV policer 1 burst 2 &> /dev/null
check_fail $? "Policer burst size was changed to burst size lower than limit"
devlink trap policer set $DEVLINK_DEV policer 1 rate 65537 &> /dev/null
check_fail $? "Policer burst size was changed to burst size higher than limit"
echo "y" > $DEBUGFS_DIR/fail_trap_policer_set
devlink trap policer set $DEVLINK_DEV policer 1 rate 3000 &> /dev/null
check_fail $? "Managed to set policer rate when should not"
echo "n" > $DEBUGFS_DIR/fail_trap_policer_set
if [ $(devlink_trap_policer_rate_get 1) -ne 2000 ]; then
check_err 1 "Policer rate was changed to an invalid value"
fi
if [ $(devlink_trap_policer_burst_get 1) -ne 16 ]; then
check_err 1 "Policer burst size was changed to an invalid value"
fi
packets_t0=$(devlink_trap_policer_rx_dropped_get 1)
sleep .5
packets_t1=$(devlink_trap_policer_rx_dropped_get 1)
if [ ! $packets_t1 -gt $packets_t0 ]; then
check_err 1 "Policer drop counter was not incremented"
fi
echo "y"> $DEBUGFS_DIR/fail_trap_policer_counter_get
devlink -s trap policer show $DEVLINK_DEV policer 1 &> /dev/null
check_fail $? "Managed to read policer drop counter when should not"
echo "n"> $DEBUGFS_DIR/fail_trap_policer_counter_get
devlink -s trap policer show $DEVLINK_DEV policer 1 &> /dev/null
check_err $? "Did not manage to read policer drop counter when should"
log_test "Trap policer"
}
trap_group_check_policer()
{
local group_name=$1; shift
devlink -j -p trap group show $DEVLINK_DEV group $group_name \
| jq -e '.[][][]["policer"]' &> /dev/null
}
trap_policer_bind_test()
{
RET=0
devlink trap group set $DEVLINK_DEV group l2_drops policer 1
check_err $? "Failed to bind a valid policer"
if [ $(devlink_trap_group_policer_get "l2_drops") -ne 1 ]; then
check_err 1 "Bound policer was not changed"
fi
devlink trap group set $DEVLINK_DEV group l2_drops policer 1337 \
&> /dev/null
check_fail $? "Did not get an error for binding a non-existing policer"
if [ $(devlink_trap_group_policer_get "l2_drops") -ne 1 ]; then
check_err 1 "Bound policer was changed when should not"
fi
devlink trap group set $DEVLINK_DEV group l2_drops policer 0
check_err $? "Failed to unbind a policer when using ID 0"
trap_group_check_policer "l2_drops"
check_fail $? "Trap group has a policer after unbinding with ID 0"
devlink trap group set $DEVLINK_DEV group l2_drops policer 1
check_err $? "Failed to bind a valid policer"
devlink trap group set $DEVLINK_DEV group l2_drops nopolicer
check_err $? "Failed to unbind a policer when using 'nopolicer' keyword"
trap_group_check_policer "l2_drops"
check_fail $? "Trap group has a policer after unbinding with 'nopolicer' keyword"
devlink trap group set $DEVLINK_DEV group l2_drops policer 1
check_err $? "Failed to bind a valid policer"
echo "y"> $DEBUGFS_DIR/fail_trap_group_set
devlink trap group set $DEVLINK_DEV group l2_drops policer 2 \
&> /dev/null
check_fail $? "Managed to bind a policer when should not"
echo "n"> $DEBUGFS_DIR/fail_trap_group_set
devlink trap group set $DEVLINK_DEV group l2_drops policer 2
check_err $? "Did not manage to bind a policer when should"
devlink trap group set $DEVLINK_DEV group l2_drops action drop \
policer 1337 &> /dev/null
check_fail $? "Did not get an error for partially modified trap group"
log_test "Trap policer binding"
}
port_del_test()
{
local group_name
local i
# The test never fails. It is meant to exercise different code paths
# and make sure we properly dismantle a port while packets are
# in-flight.
RET=0
devlink_traps_enable_all
for i in $(seq 1 10); do
ip link set dev $NETDEV up
sleep $SLEEP_TIME
netdevsim_port_destroy
netdevsim_port_create
udevadm settle
done
devlink_traps_disable_all
log_test "Port delete"
}
dev_del_test()
{
local group_name
local i
# The test never fails. It is meant to exercise different code paths
# and make sure we properly unregister traps while packets are
# in-flight.
RET=0
devlink_traps_enable_all
for i in $(seq 1 10); do
ip link set dev $NETDEV up
sleep $SLEEP_TIME
cleanup
setup_prepare
done
devlink_traps_disable_all
log_test "Device delete"
}
netdevsim_dev_create()
{
echo "$DEV_ADDR 0" > ${NETDEVSIM_PATH}/new_device
}
netdevsim_dev_destroy()
{
echo "$DEV_ADDR" > ${NETDEVSIM_PATH}/del_device
}
netdevsim_port_create()
{
echo 1 > ${NETDEVSIM_PATH}/devices/${DEV}/new_port
}
netdevsim_port_destroy()
{
echo 1 > ${NETDEVSIM_PATH}/devices/${DEV}/del_port
}
setup_prepare()
{
local netdev
netdevsim_dev_create
if [ ! -d "${NETDEVSIM_PATH}/devices/${DEV}" ]; then
echo "Failed to create netdevsim device"
exit 1
fi
netdevsim_port_create
if [ ! -d "${NETDEVSIM_PATH}/devices/${DEV}/net/" ]; then
echo "Failed to create netdevsim port"
exit 1
fi
# Wait for udev to rename newly created netdev.
udevadm settle
NETDEV=$(ls ${NETDEVSIM_PATH}/devices/${DEV}/net/)
}
cleanup()
{
pre_cleanup
netdevsim_port_destroy
netdevsim_dev_destroy
}
trap cleanup EXIT
setup_prepare
tests_run
exit $EXIT_STATUS
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