blob: fd60d7986cf42efa1ef37316cc535631b2a1791f [file] [log] [blame]
#!/bin/sh
# Copyright 2018 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# Helper script that restarts a hung network device.
SCRIPT_NAME="$(basename $0)"
POWER_DOWN_TIME_SECONDS=1
set -e
error() {
logger -t "${SCRIPT_NAME}" -s "Error: $1"
exit 1
}
if [ $# -ne 1 ] ; then
error "Missing network interface name"
fi
eval $(udevadm info --query=property --path="/sys/class/net/${1}" |
egrep '^(DEVPATH|DEVTYPE|ID_BUS|INTERFACE|SUBSYSTEM)')
if [ "${SUBSYSTEM}" != "net" -o -z "${DEVPATH}" ] ; then
error "Could not retreive info about device ${1}"
fi
logger -t "${SCRIPT_NAME}" "Restarting network interface ${INTERFACE}"
device_path="$(readlink -f "/sys${DEVPATH}/../..")"
if [ -e "/sys${DEVPATH}/device/driver/module" ]; then
module_name="$(basename "$(readlink -f "/sys${DEVPATH}/device/driver/module")")"
rmmod "${module_name}" || error "rmmod '${module_name}' failed ($?)"
fi
if [ "${ID_BUS}" = "pci" ] ; then
device_remove_path="${device_path}/remove"
bus_rescan_path="$(readlink -f "${device_path}/../rescan")"
if [ ! -e "${device_remove_path}" ] ; then
error "Device remove path ${device_remove_path} does not exist"
fi
if [ ! -e "${bus_rescan_path}" ] ; then
error "Bus rescan path ${bus_rescan_path} does not exist"
fi
echo 1 > "${device_remove_path}"
sleep ${POWER_DOWN_TIME_SECONDS}
echo 1 > "${bus_rescan_path}"
elif [ "${ID_BUS}" = "usb" ] ; then
device_authorize_path="$(readlink -f "${device_path}/../authorized")"
echo 0 > "${device_authorize_path}"
sleep ${POWER_DOWN_TIME_SECONDS}
echo 1 > "${device_authorize_path}"
else
error "Bus type '${ID_BUS}' is unknown"
fi