#!/bin/bash# SPDX-License-Identifier: GPL-2.0-only source ethtool-common.sh function get_value {    local query="${SETTINGS_MAP[$1]}"     echo $(ethtool -g $NSIM_NETDEV | \        tail -n +$CURR_SETT_LINE | \        awk -F':' -v pattern="$query:" '$0 ~ pattern {gsub(/[\t ]/, "", $2); print $2}')} function update_current_settings {    for key in ${!SETTINGS_MAP[@]}; do        CURRENT_SETTINGS[$key]=$(get_value $key)    done    echo ${CURRENT_SETTINGS[@]}} if ! ethtool -h | grep -q set-ring >/dev/null; then    echo "SKIP: No --set-ring support in ethtool"    exit 4fi NSIM_NETDEV=$(make_netdev) set -o pipefail declare -A SETTINGS_MAP=(    ["rx"]="RX"    ["rx-mini"]="RX Mini"    ["rx-jumbo"]="RX Jumbo"    ["tx"]="TX") declare -A EXPECTED_SETTINGS=(    ["rx"]=""    ["rx-mini"]=""    ["rx-jumbo"]=""    ["tx"]="") declare -A CURRENT_SETTINGS=(    ["rx"]=""    ["rx-mini"]=""    ["rx-jumbo"]=""    ["tx"]="") MAX_VALUE=$((RANDOM % $((2**32-1))))RING_MAX_LIST=$(ls $NSIM_DEV_DFS/ethtool/ring/) for ring_max_entry in $RING_MAX_LIST; do    echo $MAX_VALUE > $NSIM_DEV_DFS/ethtool/ring/$ring_max_entrydone CURR_SETT_LINE=$(ethtool -g $NSIM_NETDEV | grep -i -m1 -n 'Current hardware settings' | cut -f1 -d:) # populate the expected settings mapfor key in ${!SETTINGS_MAP[@]}; do    EXPECTED_SETTINGS[$key]=$(get_value $key)done # testfor key in ${!SETTINGS_MAP[@]}; do    value=$((RANDOM % $MAX_VALUE))     ethtool -G $NSIM_NETDEV "$key" "$value"     EXPECTED_SETTINGS[$key]="$value"    expected=${EXPECTED_SETTINGS[@]}    current=$(update_current_settings)     check $? "$current" "$expected"    set +xdone if [ $num_errors -eq 0 ]; then    echo "PASSED all $((num_passes)) checks"    exit 0else    echo "FAILED $num_errors/$((num_errors+num_passes)) checks"    exit 1fi