#!/bin/sh

# Copyright (c) 2020, NVIDIA Corporation
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this
#    list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright notice,
#    this list of conditions and the following disclaimer in the documentation
#    and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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# The views and conclusions contained in the software and documentation are those
# of the authors and should not be interpreted as representing official policies,
# either expressed or implied, of the FreeBSD Project.

usage ()
{
  echo "syntax: bfb-install --bfb|-b <BFBFILE> [--config|-c <bf.cfg>] \\"
  echo "  [--rootfs|-f <rootfs.tar.xz>] --rshim|-r <rshimN> [--help|-h]"
}

bfb=
cfg=
rootfs=
rshim=

options=`getopt -n bfb-install -o b:c:f:r:h \
        -l help,bfb:,config:,rootfs:,rshim: -- "$@"`
eval set -- $options
while [ "$1" != -- ]; do
  case $1 in
    --help|-h) usage; exit 0 ;;
    --bfb|-b) shift; bfb=$1 ;;
    --config|-c) shift; cfg=$1 ;;
    --rootfs|-f) shift; rootfs=$1 ;;
    --rshim|-r) shift; rshim=$1 ;;
  esac
  shift
done
shift

if [ $# -ne 0 ]; then
  usage >&2
  exit 1
fi

if [ -z "${bfb}" -o -z "${rshim}" ]; then
  echo "Error: Need to provide both bfb file and rshim device name."
  usage >&2
  exit 1
fi

if [ ! -e "${bfb}" ]; then
  echo "Error: ${bfb} not found."
  exit 1
fi

if [ ."$(echo "${rshim}" | cut -c1-1)" != ."/" ]; then
  rshim="/dev/${rshim}"
fi

if [ ! -e "${rshim}/boot" ]; then
  echo "Error: ${rshim}/boot not found."
  exit 1
fi

if [ -n "${rootfs}" -a ! -e "${rootfs}" ]; then
  echo "Error: ${rootfs} not found."
  exit 1
fi

if [ -n "${cfg}" -a ! -e "${cfg}" ]; then
  echo "Error: ${cfg} not found."
  exit 1
fi

if [ $(id -u) -ne 0 ]; then
  echo "Error: Need root permission to push BFB on local host."
  exit 1
fi

pv=$(which pv 2>/dev/null)
if [ -z "${pv}" ]; then
  echo "Warn: 'pv' command not found. Continue without showing BFB progress."
fi

# Push the boot stream.
echo "Pushing bfb${cfg:+ + cfg}${rootfs:+ + rootfs}"
sh -c "cat ${bfb} ${cfg:+$cfg} ${rootfs:+${rootfs}} ${pv:+| ${pv} | cat -} > ${rshim}/boot"
RETVAL=$?
if [ $RETVAL -ne 0 ]; then
  echo "Failed to push BFB"
  exit
fi

# Print the rshim log.
echo "Collecting BlueField booting status. Press Ctrl+C to stop…"

last=""
while true; do
  last_len=${#last}
  cur=$(echo 'DISPLAY_LEVEL 2' > ${rshim}/misc && cat ${rshim}/misc | sed -n '/^ INFO/,$p')
  RETVAL=$?
  if [ $RETVAL -ne 0 ]; then
    echo "Failed to read ${rshim}/misc"
    exit
  fi
  cur_len=${#cur}

  sleep 1

  # Overwrite if current length smaller than previous length.
  if [ ${last_len} -eq 0 -o ${last_len} -gt ${cur_len} ]; then
    echo "${cur}" | sed '/^[[:space:]]*$/d'
    last="${cur}"
    continue
  fi

  # Overwrite if first portion doesn't match.
  sub_cur=$(echo "${cur}" | dd bs=1 count=${last_len} 2>/dev/null)
  if [ "${sub_cur}" != "${last}" ]; then
    echo "${cur}" | sed '/^[[:space:]]*$/d'
    last="${cur}"
    continue
  fi

  # Nothing if no update.
  if [ ${last_len} -eq ${cur_len} ]; then
    continue;
  fi

  # Print the diff.
  echo "${cur}" | dd bs=1 skip=${last_len} 2>/dev/null | sed '/^[[:space:]]*$/d'
  last="${cur}"

  if echo ${cur} | grep -i "Reboot" >/dev/null; then
    break;
  fi
done