recover_duts/hooks/check_ethernet.hook

#!/bin/sh
#
# Copyright (c) 2012 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.

set -e

# Only run this script on test machines that run in the lab.
# See autotest/server/hosts/site_host.py for more information.
if [ ! -f /mnt/stateful_partition/.labmachine ]; then
  exit 0
fi

# Ping itself doesn't work on test images in a VM.
PING="curl --interface eth0 -o /dev/null www.google.com"

if ${PING};  then
  exit 0
fi

ifconfig eth0 down
ifconfig eth0 up
sleep 5

if ${PING}; then
  echo "Reconfigured using ifconfig down/up."
  exit 1
fi

initctl stop flimflam || echo "Flimflam was not running."
initctl start flimflam

sleep 5

if ${PING}; then
  exit 1
fi

# Last chance - reboot if we can't get any connectivity.
echo "All efforts to recover ethernet have been exhausted. Rebooting."
(sleep 5 && reboot) &
exit 1