#!/bin/bash
#
# run test suite for mdadm
user=`id -un`
if [ " $user" != " root" ]
then echo >&2 "test: testing can only be done as 'root'."
     exit 1;
fi

prefix='[0-9][0-9]'

dir=`pwd`
mdadm=$dir/mdadm
if [ \! -x $mdadm ]
then
   echo >&2 "test: $mdadm isn't usable."
fi

testdir="tests"
logdir="$testdir/logs"
logsave=0
exitonerror=1

echo "Testing on linux-$(uname -r) kernel"

# Check whether to run multipath tests
modprobe multipath 2> /dev/null
if grep -s 'Personalities : .*multipath' > /dev/null /proc/mdstat ; then
    MULTIPATH="yes"
fi
INTEGRITY=yes
DEVTYPE=loop
LVM_VOLGROUP=mdtest

# make sure to test local mdmon, not system one
export MDADM_NO_SYSTEMCTL=1

# assume md0, md1, md2 exist in /dev
md0=/dev/md0 md1=/dev/md1 md2=/dev/md2
mdp0=/dev/md_d0
mdp1=/dev/md_d1

# We test mdadm on loop-back block devices.
# dir for storing files should be settable by command line maybe
targetdir=/var/tmp
size=20000
# super0, round down to multiple of 64 and substract 64
mdsize0=19904
# super00 is nested, subtract 128
mdsize00=19840
# super1.0 round down to multiple of 2, subtract 8
mdsize1=19992
mdsize1a=19988
mdsize12=19988
# super1.2 for linear: round to multiple of 2, subtract 4
mdsize1_l=19996
mdsize2_l=19996
# subtract another 4 for bitmaps
mdsize1b=19988
mdsize11=19992
mdsize11a=19456
mdsize12=19988

# ddf needs bigger devices as 32Meg is reserved!
ddfsize=65536

config=/tmp/mdadm.conf

cleanup() {
	udevadm settle
	$mdadm -Ssq 2> /dev/null
        case $DEVTYPE in
        loop)
	  for d in 0 1 2 3 4 5 6 7  8 9 10 11 12 13
	  do
	    losetup -d /dev/loop$d ; # rm -f $targetdir/mdtest$d
	    rm -f /dev/disk/by-path/loop*
	  done
          ;;
        lvm)
	  for d in 0 1 2 3 4 5 6 7  8 9 10 11 12 13
	  do
	    eval "lvremove --quiet -f \$dev$d"
	  done
          ;;
        esac
}

ctrl_c() {
	exitonerror=1
}

do_setup() {
  trap cleanup 0 1 3 15
  trap ctrl_c 2

  # make sure there are no loop devices remaining.
  # udev started things can sometimes prevent them being stopped
  # immediately
  while grep loop /proc/partitions > /dev/null 2>&1
  do
    mdadm -Ss
    losetup -d /dev/loop[0-9]* 2> /dev/null
    sleep 1
  done
  devlist=
  for d in 0 1 2 3 4 5 6 7 8 9 10 11 12 13
  do
    sz=$size
    if [ $d -gt 7 ]; then sz=$ddfsize ; fi
    case $DEVTYPE in
    loop)
      [ -f $targetdir/mdtest$d ] || dd if=/dev/zero of=$targetdir/mdtest$d count=$sz bs=1K > /dev/null 2>&1
      # make sure udev doesn't touch
      mdadm --zero $targetdir/mdtest$d 2> /dev/null
      [ -b /dev/loop$d ] || mknod /dev/loop$d b 7 $d
      if [ $d -eq 7 ]
      then
        losetup /dev/loop$d $targetdir/mdtest6 # for multipath use
      else
        losetup /dev/loop$d $targetdir/mdtest$d
      fi
      eval dev$d=/dev/loop$d
      eval file$d=$targetdir/mdtest$d
      ;;
    lvm)
      unset MULTIPATH
      eval dev$d=/dev/mapper/${LVM_VOLGROUP}-mdtest$d
      if ! lvcreate --quiet -L ${sz}K -n mdtest$d $LVM_VOLGROUP; then
	  trap '' 0 # make sure lvremove is not called
	  eval echo error creating \$dev$d
	  exit 129
      fi
      ;;
    ram)
      unset MULTIPATH
      eval dev$d=/dev/ram$d
      ;;
    esac
    eval devlist=\"\$devlist \$dev$d\"
    eval devlist$d=\"\$devlist\"
   #" <-- add this quote to un-confuse vim syntax highlighting
  done
  path0=$dev6
  path1=$dev7

  ulimit -c unlimited
  [ -f /proc/mdstat ] || modprobe md_mod
  echo 2000 > /proc/sys/dev/raid/speed_limit_max
  echo 0 > /sys/module/md_mod/parameters/start_ro
}

# mdadm always adds --quiet, and we want to see any unexpected messages
mdadm() {
    rm -f $targetdir/stderr
    case $* in
	*-S* ) udevadm settle
	       p=`cat /proc/sys/dev/raid/speed_limit_max`
	       echo 20000 > /proc/sys/dev/raid/speed_limit_max
    esac
    case $* in
	*-C* ) $mdadm 2> $targetdir/stderr --quiet "$@" --auto=yes;;
	* )    $mdadm 2> $targetdir/stderr --quiet "$@"
    esac
    rv=$?
    case $* in
	*-S* ) udevadm settle
	       echo $p > /proc/sys/dev/raid/speed_limit_max
    esac
    cat >&2 $targetdir/stderr
    return $rv
}

# check various things
check() {
   case $1 in
    spares )
       spares=`tr '] ' '\012\012' < /proc/mdstat | grep -c '(S)' || exit 0`
       if [ $spares -ne $2 ]
       then
          echo >&2 "ERROR expected $2 spares, found $spares"; exit 1;
       fi
      ;;
    raid* | linear )
      grep -s "active $1 " /proc/mdstat > /dev/null || {
		echo >&2 "ERROR active $1 not found" ; cat /proc/mdstat ; exit 1;}
     ;;
    algorithm )
      grep -s " algorithm $2 " /proc/mdstat > /dev/null || {
	  echo >&2 "ERROR algorithm $2 not found"; cat /proc/mdstat; exit 1;}
     ;;
    resync | recovery | reshape)
	cnt=5
	while ! grep -s $1 /proc/mdstat > /dev/null
	do
	    if [ $cnt -gt 0 ] && grep -v idle /sys/block/md*/md/sync_action > /dev/null
	    then # Something isn't idle - wait a bit
		sleep 0.5
		cnt=$[cnt-1]
	    else
		echo >&2 ERROR no $1 happening; cat /proc/mdstat; exit 1
	    fi
	done
	;;

     nosync )
       sleep 0.5
       # Since 4.2 we delay the close of recovery until there has been a chance for
       # spares to be activated.  That means that a recovery that finds nothing
       # to do can still take a little longer than expected.
       # add an extra check: is sync_completed shows the end is reached, assume
       # there is no recovery.
       if grep -s -E '(resync|recovery|reshape) *=' > /dev/null /proc/mdstat ; then
	   incomplete=`grep / /sys/block/md*/md/sync_completed 2> /dev/null | sed '/^ *\([0-9]*\) \/ \1/d'`
	   if [ -n "$incomplete" ]; then
		echo >&2 "ERROR resync or recovery is happening!"; cat /proc/mdstat ; exit 1;
	   fi
       fi
     ;;

    wait )
      p=`cat /proc/sys/dev/raid/speed_limit_max`
      echo 2000000 > /proc/sys/dev/raid/speed_limit_max
      sleep 0.1
      while grep -E '(resync|recovery|reshape|check|repair) *=' > /dev/null /proc/mdstat ||
	      grep -v idle > /dev/null /sys/block/md*/md/sync_action
      do sleep 0.5;
      done
      echo $p > /proc/sys/dev/raid/speed_limit_max
      ;;

    state )
       grep -s "blocks.*\[$2\]\$" /proc/mdstat > /dev/null || {
		echo >&2 "ERROR state $2 not found!"; cat /proc/mdstat ; exit 1; }
       sleep 0.5
      ;;

    bitmap )
       grep -s bitmap > /dev/null /proc/mdstat || {
		echo >&2 ERROR no bitmap ; cat /proc/mdstat ; exit 1; }
      ;;
    nobitmap )
       if grep -s "bitmap" > /dev/null /proc/mdstat
       then
		echo >&2 ERROR bitmap present ; cat /proc/mdstat ; exit 1;
       fi
      ;;

    readonly )
       grep -s "read-only" > /dev/null /proc/mdstat || {
                echo >&2 "ERROR array is not read-only!"; cat /proc/mdstat ; exit 1; }
      ;;

    inactive )
       grep -s "inactive" > /dev/null /proc/mdstat || {
                echo >&2 "ERROR array is not inactive!"; cat /proc/mdstat ; exit 1; }
      ;;
    * ) echo >&2 ERROR unknown check $1 ; exit 1;
   esac
}

no_errors() {
  if [ -s $targetdir/stderr ]
  then echo Bad errors from mdadm: ; cat $targetdir/stderr; exit 2;
  fi
}
# basic device test

testdev() {
   udevadm settle
   dev=$1
   cnt=$2
   dvsize=$3
   chunk=$4
   if [ -z "$5" ]; then
      mkfs.ext3 -F -j $dev > /dev/null 2>&1 && fsck -fn $dev >&2
   fi
   dsize=$[dvsize/chunk]
   dsize=$[dsize*chunk]
   rasize=$[dsize*2*cnt]
   # rasize is in sectors
   if [ -n "$DEV_ROUND_K" ]; then
      rasize=$[rasize/DEV_ROUND_K/2]
      rasize=$[rasize*DEV_ROUND_K*2]
   fi
   if [ `/sbin/blockdev --getsize $dev` -eq 0 ]; then sleep 2 ; fi
   _sz=`/sbin/blockdev --getsize $dev`
   if [ $rasize -lt $_sz -o $[rasize*4/5] -gt $_sz ]
   then
     echo "ERROR: size is wrong for $dev: $cnt * $dvsize (chunk=$chunk) = $rasize, not $_sz"
     exit 1
   fi
}

fast_sync() {
  echo 200000 > /proc/sys/dev/raid/speed_limit_max
}

rotest() {
  dev=$1
  fsck -fn $dev >&2
}

do_test() {
  _script=$1
  _basename=`basename $_script`
  if [ -f "$_script" ]
  then
    rm -f $targetdir/stderr
    # stop all arrays, just incase some script left an array active.
    $mdadm -Ssq 2> /dev/null
    mdadm --zero $devlist 2> /dev/null
    mdadm --zero $devlist 2> /dev/null
    # this might have been reset: restore the default.
    echo 2000 > /proc/sys/dev/raid/speed_limit_max
    # source script in a subshell, so it has access to our
    # namespace, but cannot change it.
    echo -ne "$_script... "
    if ( set -ex ; . $_script ) &> $targetdir/log
    then
      echo "succeeded"
      _fail=0
    else
      log=log
      cat $targetdir/stderr >> $targetdir/log
      echo "=======================dmesg=================" >> $targetdir/log
      dmesg | tail -n 200 >> $targetdir/log
      if [ $exitonerror == 0 ]; then
	  log=log-`basename $_script`
	  mv $targetdir/log $logdir/$log
      fi
      echo "FAILED - see $logdir/$log for details"
      _fail=1
    fi
    if [ "$savelogs" == "1" ]; then
      cp $targetdir/log $logdir/$_basename.log
    fi
    if [ "$_fail" == "1" -a "$exitonerror" == "1" ]; then
      exit 1
    fi
  fi
}

do_help() {
  echo "Usage: $0 [options]"
  echo " Options:"
  echo "    --tests=<test1,test2,..>    Comma separated list of tests to run"
  echo "    --disable-multipath         Disable any tests involving multipath"
  echo "    --disable-integrity         Disable slow tests of RAID[56] consistency"
  echo "    --logdir=<directory>        Directory to save logfiles in"
  echo "    --save-logs                 Save all logs in <logdir>"
  echo "    --keep-going                Don't stop on error, ie. run all tests"
  echo "    --dev=[loop|lvm|ram]        Use loop devices (default), LVM, or RAM disk"
  echo "    --volgroup=<name>           LVM volume group for LVM test"
  echo "    setup                       Setup test environment and exit"
  echo "    cleanup                     Cleanup test environment"
  echo "    <prefix>                    Run tests with <prefix>"
}

parse_args() {
  for i in $*
  do
    case $i in
    [0-9]*)
      prefix=$i
      ;;
    setup)
      echo "mdadm test environment setup"
      do_setup
      trap 0; exit 0
      ;;
    cleanup)
      cleanup
      exit 0
      ;;
    --tests=*)
      TESTLIST=`expr "x$i" : 'x[^=]*=\(.*\)' | sed -e 's/,/ /g'`
      ;;
    --logdir=*)
      logdir=`expr "x$i" : 'x[^=]*=\(.*\)'`
      ;;
    --save-logs)
      savelogs=1
      ;;
    --keep-going | --no-error)
      exitonerror=0
      ;;
    --disable-multipath)
      unset MULTIPATH
      ;;
    --disable-integrity)
      unset INTEGRITY
      ;;
    --dev=loop)
      DEVTYPE=loop
      ;;
    --dev=lvm)
      DEVTYPE=lvm
      ;;
    --dev=ram)
      DEVTYPE=ram
      ;;
    --volgroup=*)
      LVM_VOLGROUP=`expr "x$i" : 'x[^=]*=\(.*\)'`
      ;;
    --help)
      do_help
      exit 0;
      ;;
    -*)
      echo " $0: Unknown argument: $i"
      do_help
      exit 0;
      ;;
    esac
done
}

logdir=$targetdir
parse_args $@

do_setup
mkdir -p $logdir

if [ "$savelogs" == "1" ]; then
  echo "Saving logs to $logdir"
fi

if [ "x$TESTLIST" != "x" ]; then
  for script in $TESTLIST
  do
    do_test $testdir/$script
  done
else
  for script in $testdir/$prefix $testdir/$prefix*[^~]
  do
    do_test $script
  done
fi
exit 0