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|
#!/bin/sh -eu
#
# checkarray -- initiates a check run of an array's redundancy information.
#
# Copyright © martin f. krafft <madduck@debian.org>
# distributed under the terms of the Artistic Licence 2.0
#
# Revision: $Id$
#
PROGNAME=${0##*/}
about()
{
echo "$PROGNAME -- RAID redundancy checker tool"
echo '$Id$'
echo "Copyright © 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).
-c|--cron & honour AUTOCHECK setting in /etc/default/mdadm.
-s|--status & print redundancy check status of devices.
-x|--cancel & queue a request to cancel a running redundancy check.
-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"
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=achVqQsx
LONGOPTS=all,cron,help,version,quiet,real-quiet,status,cancel
eval set -- $(getopt -o $SHORTOPTS -l $LONGOPTS -n $PROGNAME -- "$@")
arrays=''
cron=0
all=0
quiet=0
status=0
action=check
for opt in $@; do
case "$opt" in
-a|--all) all=1;;
-c|--cron) cron=1;;
-s|--status) action=status;;
-x|--cancel) action=idle;;
-h|--help) usage; exit 0;;
-q|--quiet) quiet=1;;
-Q|--real-quiet) quiet=2;;
-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: $opt" >&2; usage >&2; exit0;;
esac
done
is_true()
{
case "${1:-}" in
[Yy]es|[Yy]|1|[Tt]rue|[Tt]) return 0;;
*) return 1;
esac
}
DEBIANCONFIG=/etc/default/mdadm
[ -f $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: RAID 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
[ $quiet -lt 2 ] && echo "$PROGNAME: W: no active RAID arrays found." >&2
[ $quiet -lt 2 ] && echo "$PROGNAME: W: (maybe uninstall the mdadm package?)" >&2
exit 5
fi
if [ -z "$(ls /sys/block/md*/md/level 2>/dev/null)" ]; then
[ $quiet -lt 2 ] && echo "$PROGNAME: W: 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: W: 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: $SYNC_ACTION_CTL not writeable." >&2
exit 4
fi
case "$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
;;
esac
done
exit 0
|
