mdadm/mdcheck
Xiao Ni 72c1204567 Update to latest upstream and fix mdcheck service bug
Now mdcheck service can't be run successfully. We need to put mdcheck in to the
right place (/usr/share/mdadm/mdcheck) and it needs to remove the dependency of
mdadm_env.sh which is fixed in patch 76c224c6c.

And there is a history problem. It needed KillMode=none before, so it removed
the upstream patch 52c67fcdd. Now this problem has been fixed, so we can do the
backport more easilly now. We don't need to remove the upstream patch here again.

It adds a rhel only feature too for transient failure.

Resolves: rhbz#2159923, rhbz#2150865, rhbz#2124071, rhbz#2203859

Signed-off-by: Xiao Ni <xni@redhat.com>
2023-05-16 10:41:01 +08:00

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#!/bin/bash
# Copyright (C) 2014-2017 Neil Brown <neilb@suse.de>
#
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# Author: Neil Brown
# Email: <neilb@suse.com>
# This script should be run periodically to automatically
# perform a 'check' on any md arrays.
#
# It supports a 'time budget' such that any incomplete 'check'
# will be checkpointed when that time has expired.
# A subsequent invocation can allow the 'check' to continue.
#
# Options are:
# --continue Don't start new checks, only continue old ones.
# --duration This is passed to "date --date=$duration" to find out
# when to finish
#
# To support '--continue', arrays are identified by UUID and the 'sync_completed'
# value is stored in /var/lib/mdcheck/$UUID
# convert a /dev/md name into /sys/.../md equivalent
sysname() {
set `ls -lLd $1`
maj=${5%,}
min=$6
readlink -f /sys/dev/block/$maj:$min
}
args=$(getopt -o hcd: -l help,continue,duration: -n mdcheck -- "$@")
rv=$?
if [ $rv -ne 0 ]; then exit $rv; fi
eval set -- $args
cont=
endtime=
while [ " $1" != " --" ]
do
case $1 in
--help )
echo >&2 'Usage: mdcheck [--continue] [--duration time-offset]'
echo >&2 ' time-offset must be understood by "date --date"'
exit 0
;;
--continue ) cont=yes ;;
--duration ) shift; dur=$1
endtime=$(date --date "$dur" "+%s")
;;
esac
shift
done
shift
# We need a temp file occasionally...
tmp=/var/lib/mdcheck/.md-check-$$
trap 'rm -f "$tmp"' 0 2 3 15
# firstly, clean out really old state files
mkdir -p /var/lib/mdcheck
find /var/lib/mdcheck -name "MD_UUID*" -type f -mtime +180 -exec rm {} \;
# Now look at each md device.
cnt=0
for dev in /dev/md?*
do
[ -e "$dev" ] || continue
sys=`sysname $dev`
if [ ! -f "$sys/md/sync_action" ]
then # cannot check this array
continue
fi
if [ "`cat $sys/md/sync_action`" != 'idle' ]
then # This array is busy
continue
fi
mdadm --detail --export "$dev" | grep '^MD_UUID=' > $tmp || continue
source $tmp
fl="/var/lib/mdcheck/MD_UUID_$MD_UUID"
if [ -z "$cont" ]
then
start=0
logger -p daemon.info mdcheck start checking $dev
elif [ -z "$MD_UUID" -o ! -f "$fl" ]
then
# Nothing to continue here
continue
else
start=`cat "$fl"`
logger -p daemon.info mdcheck continue checking $dev from $start
fi
cnt=$[cnt+1]
eval MD_${cnt}_fl=\$fl
eval MD_${cnt}_sys=\$sys
eval MD_${cnt}_dev=\$dev
echo $start > $fl
echo $start > $sys/md/sync_min
echo check > $sys/md/sync_action
done
if [ -z "$endtime" ]
then
exit 0
fi
while [ `date +%s` -lt $endtime ]
do
any=
for i in `eval echo {1..$cnt}`
do
eval fl=\$MD_${i}_fl
eval sys=\$MD_${i}_sys
eval dev=\$MD_${i}_dev
if [ -z "$fl" ]; then continue; fi
if [ "`cat $sys/md/sync_action`" != 'check' ]
then
logger -p daemon.info mdcheck finished checking $dev
eval MD_${i}_fl=
rm -f $fl
continue;
fi
read a rest < $sys/md/sync_completed
echo $a > $fl
any=yes
done
if [ -z "$any" ]; then exit 0; fi
sleep 120
done
# We've waited, and there are still checks running.
# Time to stop them.
for i in `eval echo {1..$cnt}`
do
eval fl=\$MD_${i}_fl
eval sys=\$MD_${i}_sys
eval dev=\$MD_${i}_dev
if [ -z "$fl" ]; then continue; fi
if [ "`cat $sys/md/sync_action`" != 'check' ]
then
eval MD_${i}_fl=
rm -f $fl
continue;
fi
echo idle > $sys/md/sync_action
cat $sys/md/sync_min > $fl
logger -p daemon.info pause checking $dev at `cat $fl`
done