Please see the header of the script for more details.
Signed-off-by: Michael Tremer michael.tremer@ipfire.org --- config/rootfiles/common/aarch64/stage2 | 1 + config/rootfiles/common/armv6l/stage2 | 1 + config/rootfiles/common/x86_64/stage2 | 1 + config/rootfiles/core/168/update.sh | 3 + src/scripts/repair-mdraid | 169 +++++++++++++++++++++++++ 5 files changed, 175 insertions(+) create mode 100644 src/scripts/repair-mdraid
diff --git a/config/rootfiles/common/aarch64/stage2 b/config/rootfiles/common/aarch64/stage2 index 352c704d4..e328a4526 100644 --- a/config/rootfiles/common/aarch64/stage2 +++ b/config/rootfiles/common/aarch64/stage2 @@ -99,6 +99,7 @@ usr/local/bin/ipsec-interfaces usr/local/bin/makegraphs usr/local/bin/qosd usr/local/bin/readhash +usr/local/bin/repair-mdraid usr/local/bin/run-parts usr/local/bin/scanhd usr/local/bin/settime diff --git a/config/rootfiles/common/armv6l/stage2 b/config/rootfiles/common/armv6l/stage2 index 198461a01..2bd00d968 100644 --- a/config/rootfiles/common/armv6l/stage2 +++ b/config/rootfiles/common/armv6l/stage2 @@ -97,6 +97,7 @@ usr/local/bin/ipsec-interfaces usr/local/bin/makegraphs usr/local/bin/qosd usr/local/bin/readhash +usr/local/bin/repair-mdraid usr/local/bin/run-parts usr/local/bin/scanhd usr/local/bin/settime diff --git a/config/rootfiles/common/x86_64/stage2 b/config/rootfiles/common/x86_64/stage2 index b03a7fecf..586b88e3d 100644 --- a/config/rootfiles/common/x86_64/stage2 +++ b/config/rootfiles/common/x86_64/stage2 @@ -99,6 +99,7 @@ usr/local/bin/ipsec-interfaces usr/local/bin/makegraphs usr/local/bin/qosd usr/local/bin/readhash +usr/local/bin/repair-mdraid usr/local/bin/run-parts usr/local/bin/scanhd usr/local/bin/settime diff --git a/config/rootfiles/core/168/update.sh b/config/rootfiles/core/168/update.sh index c4005dba9..84dec941c 100644 --- a/config/rootfiles/core/168/update.sh +++ b/config/rootfiles/core/168/update.sh @@ -125,6 +125,9 @@ if ! grep -q rd.auto /etc/default/grub; then sed -e "s/panic=10/& rd.auto/" -i /etc/default/grub fi
+# Repair any broken MDRAID arrays +/usr/local/bin/repair-mdraid + # Start services /etc/init.d/fcron restart /etc/init.d/sshd restart diff --git a/src/scripts/repair-mdraid b/src/scripts/repair-mdraid new file mode 100644 index 000000000..a622ff71d --- /dev/null +++ b/src/scripts/repair-mdraid @@ -0,0 +1,169 @@ +#!/bin/bash +############################################################################### +# # +# IPFire.org - A linux based firewall # +# Copyright (C) 2022 IPFire Team info@ipfire.org # +# # +# 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 3 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. # +# # +# You should have received a copy of the GNU General Public License # +# along with this program. If not, see http://www.gnu.org/licenses/. # +# # +############################################################################### +# +# This script is supposed to repair any broken RAID installations +# where the system has been booted from only one of the RAID devices +# without the software RAID being activated first. +# +# This script does as follows: +# +# * It tries to find an inactive RAID called "ipfire:0" +# * It will then destroy any devices that are still part of this RAID. +# This is required because if the RAID is being assembled correctly, +# data from the disk that has NOT been mounted will be replicated +# back to the device that has been changed. That causes that any +# data that has been written to the mounted disk will be lost. +# To avoid this, we will partially destroy the RAID. +# * We will then erase any partition tables and destroy any filesystems +# on the devices so that they do not get accidentially mounted again. +# * The system will then need to be rebooted where the RAID will be +# mounted again in a degraded state which might take some extra +# time at boot (the system stands still for about a minute). +# * After the system has been booted up correctly, we will re-add +# the devices back to the RAID which will resync and the system +# will be back to its intended configuration. + +find_inactive_raid() { + local status + local device + local arg + local args + + while read -r status device args; do + if [ "${status}" = "INACTIVE-ARRAY" ]; then + for arg in ${args}; do + case "${arg}" in + name=ipfire:0) + echo "${device}" + return 0 + ;; + esac + done + fi + done <<< "$(mdadm --detail --scan)" + + return 1 +} + +find_root() { + local device + local mp + local fs + local args + + while read -r device mp fs args; do + if [ "${mp}" = "/" ]; then + echo "${device:0:-1}" + return 0 + fi + done < /proc/mounts + + return 1 +} + +find_raid_devices() { + local raid="${1}" + + local IFS=, + + local device + for device in $(mdadm -v --detail --scan "${raid}" | awk -F= '/^[ ]+devices/ { print $2 }'); do + echo "${device}" + done + + return 0 +} + +destroy_everything() { + local device="${1}" + local part + + # Destroy the RAID superblock + mdadm --zero-superblock "${device}" + + # Wipe the partition table + wipefs -a "${device}" + + # Wipe any partition signatures + for part in ${device}*; do + wipefs -a "${part}" + done +} + +raid_rebuild() { + local devices=( "$@" ) + + cat > /etc/rc.d/rcsysinit.d/S99fix-raid <<EOF +#!/bin/bash + +case "${1}" in + start) + if [ -e "/dev/md/ipfire:0" ]; then + for device in ${devices[@]}; do + mdadm --add "/dev/md/ipfire:0" "${device}" + done + + # Delete this script + rm "${0}" + fi + ;; +esac +EOF + + chmod a+x /etc/rc.d/rcsysinit.d/S99fix-raid +} + +main() { + local raid="$(find_inactive_raid)" + + # Nothing to do if no RAID device found + if [ -z "${raid}" ]; then + return 0 + fi + + echo "Fixing RAID ${raid}..." + + local root="$(find_root)" + + # Finding any devices in this RAID + local devices=( + $(find_raid_devices "${raid}") + ) + + # Stop the RAID + mdadm --stop "${raid}" &>/dev/null + + # Destroy any useful data on all remaining RAID devices + local device + for device in ${devices[@]}; do + # Skip root + [ "${device}" = "${root}" ] && continue + + destroy_everything "${device}" + done &>/dev/null + + # Re-add devices to the RAID + raid_rebuild "${device}" + + return 0 +} + +main "$@" || return $?