Commit 242aaf03 authored by Jakub Kicinski's avatar Jakub Kicinski Committed by David S. Miller
Browse files

selftests: add a test for ethtool pause stats 



Make sure the empty nest is reported even without stats.
Make sure reporting only selected stats works fine.

Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
Reviewed-by: default avatarSaeed Mahameed <saeedm@nvidia.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ff1f7c17

tools/testing/selftests/drivers/net/netdevsim/ethtool-pause.sh

0 → 100755
+108 −0
Original line number Diff line number Diff line 
#!/bin/bash

# SPDX-License-Identifier: GPL-2.0-only



NSIM_ID=$((RANDOM % 1024))

NSIM_DEV_SYS=/sys/bus/netdevsim/devices/netdevsim$NSIM_ID

NSIM_DEV_DFS=/sys/kernel/debug/netdevsim/netdevsim$NSIM_ID

NSIM_NETDEV=

num_passes=0

num_errors=0



function cleanup_nsim {

    if [ -e $NSIM_DEV_SYS ]; then

	echo $NSIM_ID > /sys/bus/netdevsim/del_device

    fi

}



function cleanup {

    cleanup_nsim

}



trap cleanup EXIT



function get_netdev_name {

    local -n old=$1



    new=$(ls /sys/class/net)



    for netdev in $new; do

	for check in $old; do

            [ $netdev == $check ] && break

	done



	if [ $netdev != $check ]; then

	    echo $netdev

	    break

	fi

    done

}



function check {

    local code=$1

    local str=$2

    local exp_str=$3



    if [ $code -ne 0 ]; then

	((num_errors++))

	return

    fi



    if [ "$str" != "$exp_str"  ]; then

	echo -e "Expected: '$exp_str', got '$str'"

	((num_errors++))

	return

    fi



    ((num_passes++))

}



# Bail if ethtool is too old

if ! ethtool -h | grep include-stat 2>&1 >/dev/null; then

    echo "SKIP: No --include-statistics support in ethtool"

    exit 4

fi



# Make a netdevsim

old_netdevs=$(ls /sys/class/net)



modprobe netdevsim

echo $NSIM_ID > /sys/bus/netdevsim/new_device



NSIM_NETDEV=`get_netdev_name old_netdevs`



set -o pipefail



echo n > $NSIM_DEV_DFS/ethtool/pause/report_stats_tx

echo n > $NSIM_DEV_DFS/ethtool/pause/report_stats_rx



s=$(ethtool --json -a $NSIM_NETDEV | jq '.[].statistics')

check $? "$s" "null"



s=$(ethtool -I --json -a $NSIM_NETDEV | jq '.[].statistics')

check $? "$s" "{}"



echo y > $NSIM_DEV_DFS/ethtool/pause/report_stats_tx



s=$(ethtool -I --json -a $NSIM_NETDEV | jq '.[].statistics | length')

check $? "$s" "1"



s=$(ethtool -I --json -a $NSIM_NETDEV | jq '.[].statistics.tx_pause_frames')

check $? "$s" "2"



echo y > $NSIM_DEV_DFS/ethtool/pause/report_stats_rx



s=$(ethtool -I --json -a $NSIM_NETDEV | jq '.[].statistics | length')

check $? "$s" "2"



s=$(ethtool -I --json -a $NSIM_NETDEV | jq '.[].statistics.rx_pause_frames')

check $? "$s" "1"

s=$(ethtool -I --json -a $NSIM_NETDEV | jq '.[].statistics.tx_pause_frames')

check $? "$s" "2"



if [ $num_errors -eq 0 ]; then

    echo "PASSED all $((num_passes)) checks"

    exit 0

else

    echo "FAILED $num_errors/$((num_errors+num_passes)) checks"

    exit 1

fi