diff options
Diffstat (limited to 'debian/checkarray')
| -rw-r--r-- | debian/checkarray | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/debian/checkarray b/debian/checkarray new file mode 100644 index 00000000..1fb97356 --- /dev/null +++ b/debian/checkarray @@ -0,0 +1,219 @@ +#!/bin/sh +# +# checkarray -- initiates a check run of an MD array's redundancy information. +# +# Copyright © 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 +Copyright © martin f. krafft <madduck@debian.org> +Released under the terms of the Artistic Licence 2.0" +} + +usage() +{ + about + echo " +Usage: $PROGNAME [options] [arrays] + +Valid options are: + -a|--all check all assembled arrays (ignores arrays in command line). + -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 scheduling class (idle) + -l|--slow perform check in a lower-than-standard scheduling class + -f|--fast perform check in higher-than-standard scheduling class + --realtime perform check in real-time scheduling class (DANGEROUS!) + -c|--cron honour AUTOCHECK setting in /etc/default/mdadm. + -q|--quiet suppress informational messages + (use twice to suppress error messages too). + -h|--help show this output. + -V|--version show version information. + +Examples: + $PROGNAME --all --idle + $PROGNAME --quiet /dev/md[123] + $PROGNAME -sa + $PROGNAME -x --all + +Devices can be specified in almost any format. The following are equivalent: + /dev/md0, md0, /dev/md/0, /sys/block/md0 + +You can also control the status of a check with /proc/mdstat file." +} + +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=$(($quiet+1));; + -Q|--real-quiet) quiet=$(($quiet+2));; # for compatibility + -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: $opt. Try --help." >&2; exit 1;; + esac +done + +is_true() +{ + case "${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 $arrays; do + MDBASE=/sys/block/$array/md + + if [ ! -e $MDBASE/sync_action ]; then + [ $quiet -lt 1 ] && echo "$PROGNAME: I: skipping non-redundant array $array." >&2 + continue + fi + + read cur_status < $MDBASE/sync_action + + if [ $action = status ]; then + echo "$array: $cur_status" + continue + fi + + if [ ! -w $MDBASE/sync_action ]; then + [ $quiet -lt 2 ] && echo "$PROGNAME: E: $MDBASE/sync_action not writeable." >&2 + exit 4 + fi + + if [ "$(cat $MDBASE/array_state)" = 'read-auto' ]; then + [ $quiet -lt 1 ] && echo "$PROGNAME: W: array $array in auto-read-only state, skipping..." >&2 + continue + fi + + case "$action" in + idle) + echo $action > $MDBASE/sync_action + [ $quiet -lt 1 ] && echo "$PROGNAME: I: cancel request queued for array $array." >&2 + ;; + + check) + if [ "$cur_status" != idle ]; then + [ $quiet -lt 2 ] && echo "$PROGNAME: W: array $array not idle, skipping..." >&2 + continue + fi + + # check if the array created recently and skip test if it is + created=$(mdadm --detail /dev/$array 2>/dev/null | + sed -n 's/.*Creation Time *://p' ) + if [ -n "$created" ]; then + created=$(date +%s -d "$created" 2>/dev/null) + fi + if [ -n "$created" ]; then + now=$(date +%s) + if [ "$created" -lt "$now" -a \ + "$created" -gt "$(($now - 14 * 24 * 60 * 60))" ]; then + [ $quiet -lt 2 ] && echo "$PROGNAME: I: array $array created recently, skipping..." >&2 + continue + fi + 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 > $MDBASE/sync_action + [ $quiet -lt 1 ] && echo "$PROGNAME: I: check queued for array $array." >&2 + + case "$ionice" in + idle) ioarg='-c3'; renice=15;; + low) ioarg='-c2 -n7'; renice=5;; + high) ioarg='-c2 -n0'; renice=0;; + realtime) ioarg='-c1 -n4'; renice=-5;; + *) 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 + [ $quiet -lt 1 ] && echo "$PROGNAME: I: selecting $ionice I/O scheduling class and $renice niceness for resync of $array." >&2 + ionice -p "$resync_pid" $ioarg 2>/dev/null || : + renice -n $renice -p "$resync_pid" 1>/dev/null 2>&1 || : + break + fi + sleep 1 + done + ;; + esac + +done + +exit 0 |