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#!/bin/sh
#
# Copyright © 2006-2008 Martin F. Krafft <madduck@debian.org>,
# 2012 Michael Tokarev <mjt@tls.msk.ru>
# based on the scripts in the initramfs-tools package.
# released under the terms of the Artistic Licence.
#
set -eu
PREREQ=
prereqs()
{
echo "$PREREQ"
}
case "${1:-}" in
prereqs)
prereqs
exit 0
;;
esac
is_true()
{
case "${1:-}" in
[Yy]es|[Yy]|1|[Tt]rue|[Tt]) return 0;;
*) return 1;;
esac
}
write()
{
local PREFIX; PREFIX=$1; shift
echo "${PREFIX}: mdadm: $@" >&2
}
info()
{
is_true ${VERBOSE:-false} && write I "$@" || :
}
warn()
{
write W "$@"
}
err()
{
write E "$@"
}
MDADM=/sbin/mdadm
MDMON=/sbin/mdmon
[ -x "$MDADM" ] || exit 0
[ -r /usr/share/initramfs-tools/hook-functions ] || exit 0
. /usr/share/initramfs-tools/hook-functions
# copy the binary as early as possible
copy_exec $MDADM /sbin
copy_exec $MDMON /sbin
# copy all modules into the initramfs, just for safety.
# we copy raid456 / raid5+raid6 because the hook script just won't do
# anything when the module cannot be found.
modules="linear multipath raid0 raid1 raid456 raid5 raid6 raid10"
for mod in $modules; do manual_add_modules $mod; done
# read in the configuration
CONFIG=/etc/mdadm/mdadm.conf
ALTCONFIG=/etc/mdadm.conf
[ ! -f $CONFIG ] && [ -f $ALTCONFIG ] && CONFIG=$ALTCONFIG || :
DEBIANCONFIG=/etc/default/mdadm
INITRDSTART=all
[ -s $DEBIANCONFIG ] && . $DEBIANCONFIG
[ -z "$INITRDSTART" ] && INITRDSTART=none
DESTMDADMCONF=$DESTDIR/etc/mdadm/mdadm.conf
DESTCONFIG=$DESTDIR/conf/mdadm
if [ -f $CONFIG ]; then
homehost="$(sed -ne 's,^[[:space:]]*HOMEHOST[[:space:]]*,,p' $CONFIG)"
fi
if [ -z "${homehost:-}" ] || [ "${homehost:-}" = '<system>' ]; then
echo "MD_HOMEHOST='$(hostname)'" > $DESTCONFIG
fi
install_config()
{
# install the configuration file
mkdir -p ${2%/*}
# only copy ARRAY/DEVICE/HOMEHOST lines, and merge continuation lines into one
if [ -f "$1" ] ; then
sed -e :a -re '$!N;s/\n[[:space:]]+/ /;ta' -ne '/^(ARRAY|DEVICE|HOMEHOST)/P;D' $1 > $2
fi
}
if [ ! -f $CONFIG ]; then
# there is no configuration file, so let's create one
if /usr/share/mdadm/mkconf generate $CONFIG; then
# all is well
install_config $CONFIG $DESTMDADMCONF
info "auto-generated the mdadm.conf configuration file."
else
# we failed to auto-generate, so let the emergency procedure take over
warn "failed to auto-generate the mdadm.conf file."
warn "please read /usr/share/doc/mdadm/README.upgrading-2.5.3.gz ."
fi
else
use_temp=0
if [ -e /var/lib/mdadm/CONF-UNCHECKED ]; then
# the file comes from an old installation and hence is not guaranteed to
# work. We thus better create one and start all arrays to be sure.
warn "unchecked configuration file: $CONFIG"
warn "please read /usr/share/doc/mdadm/README.upgrading-2.5.3.gz ."
use_temp=1
elif ! grep -q '^ARRAY' $CONFIG; then
# the file defines no ARRAYs. We better create a temporary file to be
# sure.
warn "$CONFIG defines no arrays."
use_temp=1
else
# this is the ideal case
install_config $CONFIG $DESTMDADMCONF
info "using configuration file: $CONFIG"
fi
if [ $use_temp -eq 1 ]; then
mkdir --parents ${DESTMDADMCONF%/*}
tmpfile="${DESTMDADMCONF}.tmp"
if /usr/share/mdadm/mkconf > $tmpfile; then
# all is well, we now have a temporary configuration file
info "auto-generated temporary mdadm.conf configuration file."
install_config $tmpfile $DESTMDADMCONF
else
# stuff's really broke, as we failed to generate a temporary file.
# let's hope the unchecked file works, provided it contains at least one
# ARRAY statement...
warn "failed to auto-generate temporary mdadm.conf file."
if grep -q '^ARRAY' $CONFIG; then
warn "using the unchecked file and hoping for the best..."
install_config $CONFIG $DESTMDADMCONF
fi
fi
rm -f $tmpfile
fi
fi
# if at this point, $DESTMDADMCONF does not exist or it does not contain any
# ARRAY statements, we must let the initramfs handle stuff.
if [ ! -f $DESTMDADMCONF ]; then
warn "no configuration file available."
info "letting initramfs assemble auto-detected arrays."
exit 0
elif ! grep -q '^ARRAY' $DESTMDADMCONF; then
warn "no arrays defined in configuration file."
info "letting initramfs assemble auto-detected arrays."
exit 0
else
# obtain devices list from config file, honouring multiline entries
devices="$(
dev=
while read line; do
case "$line" in
(ARRAY*) :;;
(*) continue;;
esac
for atom in $line; do
case "$atom" in
(/dev*) dev=$atom;;
esac
done
# /dev/mdX and /dev/md/X are the same, really
case "$dev" in
"") continue ;;
(/dev/md/*) alt=/dev/md${dev##*/};;
(/dev/md*) alt=/dev/md/${dev#/dev/md};;
(*)
err "unknown device encountered: $dev"
warn_emergency
exit 0
;;
esac
if [ ! -b "$dev" ] && [ -b "$alt" ]; then
dev="$alt"
fi
echo "$dev"
done < $DESTMDADMCONF)" || exit $?
fi
if [ "$INITRDSTART" != none ] && [ -n "$devices" ]; then
devs=
for dev in $devices; do
case "$INITRDSTART " in
all|*${dev}[[:space:]]*)
case "$devs " in # uniquiness
(*${dev}\ *) :;;
(*) devs="${devs:+$devs }$dev" ;;
esac
;;
*) :;;
esac
done
# make sure the configuration file knows about all running devices
$MDADM --detail --scan | while read array device params; do
uuid=${params#*UUID=}; uuid=${uuid%% *}
if ! grep -qi "uuid=$uuid" $DESTMDADMCONF; then
warn "the array $device with UUID $uuid"
warn "is currently active, but it is not listed in mdadm.conf. if"
warn "it is needed for boot, then YOUR SYSTEM IS NOW UNBOOTABLE!"
warn "please inspect the output of /usr/share/mdadm/mkconf, compare"
warn "it to $CONFIG, and make the necessary changes."
fi
done
for i in $INITRDSTART; do
case "$INITRDSTART" in all) break;; *) :;; esac
case "$devs" in
*${i}*) continue;;
*) :;;
esac
warn "I am supposed to start $i from the initial ramdisk,"
warn "yet I cannot find the array in the configuration file."
warn "I am thus reverting to starting all arrays."
INITRDSTART=all
break
done
if [ "$INITRDSTART" = all ]; then
echo "MD_DEVS=all" >> $DESTCONFIG
else
echo "MD_DEVS='$devs'" >> $DESTCONFIG
fi
if [ "$INITRDSTART" = all ]; then
info "will start all available MD arrays from the initial ramdisk."
else
for i in $devs; do
info "will start MD array $i from the initial ramdisk."
done
fi
# Copy udev rules, which udev no longer does
UDEV_RULE=63-md-raid-arrays.rules
for rules_folder in /lib/udev/rules.d /etc/udev/rules.d; do
if [ -f $rules_folder/$UDEV_RULE ]; then
mkdir -p $DESTDIR$rules_folder
cp $rules_folder/$UDEV_RULE $DESTDIR$rules_folder/$UDEV_RULE
fi
done
else
echo "MD_DEVS=none" >> $DESTCONFIG
info "no MD arrays will be started from the initial ramdisk."
fi
# only output this on Debian systems
[ -s /etc/default/mdadm ] && \
info 'use `dpkg-reconfigure --priority=low mdadm` to change this.'
exit 0
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