Attachment 4940 Details for Bug 25641 – checkarray

checkarray

checkarray (text/plain), 5.85 KB, created by Vladimir V. Kamarzin on 2011-05-20 09:44:57 MSK

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Creator: Vladimir V. Kamarzin

Created: 2011-05-20 09:44:57 MSK

Size: 5.85 KB

patch

obsolete

>#!/bin/sh
>#
># checkarray -- initiates a check run of an MD array's redundancy information.
>#
># Copyright Â© martin f. krafft <madduck@debian.org>
># distributed under the terms of the Artistic Licence 2.0
>#
>set -eu
>
>PROGNAME=${0##*/}
>
>about()
>{
>  echo "$PROGNAME -- MD array (RAID) redundancy checker tool"
>  echo "Copyright Â© martin f. krafft <madduck@debian.org>"
>  echo "Released under the terms of the Artistic Licence 2.0"
>}
>
>usage()
>{
>  about
>  echo
>  echo "Usage: $PROGNAME [options] [arrays]"
>  echo
>  echo "Valid options are:"
>  cat <<-_eof | column -s\& -t
>	-a|--all & check all assembled arrays (check /proc/mdstat).
>	-s|--status & print redundancy check status of devices.
>	-x|--cancel & queue a request to cancel a running redundancy check.
>	-i|--idle & perform check in a lowest I/O scheduling class (idle).
>	-l|--slow & perform check in a lower-than-standard I/O scheduling class.
>	-f|--fast & perform check in higher-than-standard I/O scheduling class.
>	--realtime & perform check in real-time I/O scheduling class (DANGEROUS!).
>	-c|--cron & honour AUTOCHECK setting in /etc/default/mdadm.
>	-q|--quiet & suppress informational messages.
>	-Q|--real-quiet & suppress all output messages, including warnings and errors.
>	-h|--help & show this output.
>	-V|--version & show version information.
>	_eof
>  echo
>  echo "Examples:"
>  echo "  $PROGNAME --all --idle"
>  echo "  $PROGNAME --quiet /dev/md[123]"
>  echo "  $PROGNAME -sa"
>  echo "  $PROGNAME -x --all"
>  echo
>  echo "Devices can be specified in almost any format. The following are"
>  echo "all equivalent:"
>  echo "  /dev/md0, md0, /dev/md/0, /sys/block/md0"
>  echo
>  echo "The --all option overrides all arrays passed to the script."
>  echo
>  echo "You can also control the status of a check with /proc/mdstat ."
>}
>
>SHORTOPTS=achVqQsxilf
>LONGOPTS=all,cron,help,version,quiet,real-quiet,status,cancel,idle,slow,fast,realtime
>
>eval set -- $(getopt -o $SHORTOPTS -l $LONGOPTS -n $PROGNAME -- "$@")
>
>arrays=''
>cron=0
>all=0
>quiet=0
>status=0
>action=check
>ionice=
>
>for opt in $@; do
>  case "$opt" in
>    -a|--all) all=1;;
>    -s|--status) action=status;;
>    -x|--cancel) action=idle;;
>    -i|--idle) ionice=idle;;
>    -l|--slow) ionice=low;;
>    -f|--fast) ionice=high;;
>    --realtime) ionice=realtime;;
>    -c|--cron) cron=1;;
>    -q|--quiet) quiet=1;;
>    -Q|--real-quiet) quiet=2;;
>    -h|--help) usage; exit 0;;
>    -V|--version) about; exit 0;;
>    /dev/md/*|md/*) arrays="${arrays:+$arrays }md${opt#*md/}";;
>    /dev/md*|md*) arrays="${arrays:+$arrays }${opt#/dev/}";;
>    /sys/block/md*) arrays="${arrays:+$arrays }${opt#/sys/block/}";;
>    --) :;;
>    *) echo "$PROGNAME: E: invalid option: $opt" >&2; usage >&2; exit 0;;
>  esac
>done
>
>is_true()
>{
>  case "${1:-}" in
>    [Yy]es|[Yy]|1|[Tt]rue|[Tt]) return 0;;
>    *) return 1;
>  esac
>}
>
>DEBIANCONFIG=/etc/default/mdadm
>[ -r $DEBIANCONFIG ] && . $DEBIANCONFIG
>if [ $cron = 1 ] && ! is_true ${AUTOCHECK:-false}; then
>  [ $quiet -lt 1 ] && echo "$PROGNAME: I: disabled in $DEBIANCONFIG ." >&2
>  exit 0
>fi
>
>if [ ! -f /proc/mdstat ]; then
>  [ $quiet -lt 2 ] && echo "$PROGNAME: E: MD subsystem not loaded, or /proc unavailable." >&2
>  exit 2
>fi
>
>if [ ! -d /sys/block ]; then
>  [ $quiet -lt 2 ] && echo "$PROGNAME: E: /sys filesystem not available." >&2
>  exit 7
>fi
>
>if [ -z "$(ls /sys/block/md* 2>/dev/null)" ]; then
>  if [ $quiet -lt 2 ] && [ $cron != 1 ]; then
>    echo "$PROGNAME: W: no active MD arrays found." >&2
>    echo "$PROGNAME: W: (maybe uninstall the mdadm package?)" >&2
>  fi
>  exit 0
>fi
>
>if [ -z "$(ls /sys/block/md*/md/level 2>/dev/null)" ]; then
>  [ $quiet -lt 2 ] && echo "$PROGNAME: E: kernel too old, no support for redundancy checks." >&2
>  exit 6
>fi
>
>if ! egrep -q '^raid([1456]|10)$' /sys/block/md*/md/level 2>/dev/null; then
>  [ $quiet -lt 1 ] && echo "$PROGNAME: I: no redundant arrays present; skipping checks..." >&2
>  exit 0
>fi
>
>if [ -z "$(ls /sys/block/md*/md/sync_action 2>/dev/null)" ]; then
>  [ $quiet -lt 2 ] && echo "$PROGNAME: E: no kernel support for redundancy checks." >&2
>  exit 3
>fi
>
>[ $all = 1 ] && arrays="$(ls -d1 /sys/block/md* | cut -d/ -f4)"
>
>for array in $arrays; do
>  SYNC_ACTION_CTL=/sys/block/$array/md/sync_action
>
>  if [ ! -e $SYNC_ACTION_CTL ]; then
>    [ $quiet -lt 1 ] && echo "$PROGNAME: I: skipping non-redundant array $array." >&2
>    continue
>  fi
>
>  cur_status="$(cat $SYNC_ACTION_CTL)"
>
>  if [ $action = status ]; then
>    echo "$array: $cur_status"
>    continue
>  fi
>
>  if [ ! -w $SYNC_ACTION_CTL ]; then
>    [ $quiet -lt 2 ] && echo "$PROGNAME: E: $SYNC_ACTION_CTL not writeable." >&2
>    exit 4
>  fi
>
>  if [ "$(cat /sys/block/$array/md/array_state)" = 'read-auto' ]; then
>    echo "$PROGNAME: W: array $array in auto-read-only state, skipping..." >&2
>    continue
>  fi
>
>  case "$action" in
>    idle)
>      echo $action > $SYNC_ACTION_CTL
>      [ $quiet -lt 1 ] && echo "$PROGNAME: I: cancel request queued for array $array." >&2
>      ;;
>
>    check)
>      if [ "$cur_status" != idle ]; then
>        [ $quiet -lt 2 ] && echo "$PROGNAME: W: array $array not idle, skipping..." >&2
>        continue
>      fi
>
>      # queue request for the array. The kernel will make sure that these requests
>      # are properly queued so as to not kill one of the array.
>      echo $action > $SYNC_ACTION_CTL
>      [ $quiet -lt 1 ] && echo "$PROGNAME: I: check queued for array $array." >&2
>
>      case "$ionice" in
>        idle) arg='-c3';;
>        low) arg='-c2 -n7';;
>        high) arg='-c2 -n0';;
>        realtime) arg='-c1 -n4';;
>        *) break;;
>      esac
>
>      resync_pid= wait=5
>      while [ $wait -gt 0 ]; do
>        wait=$((wait - 1))
>        resync_pid=$(ps -ef | awk -v dev=$array 'BEGIN { pattern = "^\\[" dev "_resync]$" } $8 ~ pattern { print $2 }')
>        if [ -n "$resync_pid" ]; then
>          echo "$PROGNAME: I: selecting $ionice I/O scheduling class for resync of $array." >&2
>          ionice -p "$resync_pid" $arg
>          break
>        fi
>        sleep 1
>      done
>      ;;
>  esac
>
>done
>
>exit 0

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Attachments on bug 25641: 4939 | 4940