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#!/bin/sh
# Simple partitioning shell script.
# Copyright © 2013 Guilhem Moulin <guilhem@fripost.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/>.
set -ue
. /lib/fripost-partman/base.sh
#device=/dev/sda
device='/dev/sda /dev/sdb' # space-separated form mutiple disks (raid)
raidLevel=1 # raid level (leave empty for no raid)
raidActiveDev=2 # number active devices in the array
n=0
for d in $device; do
n=$(( $n + 1 ))
wait_for_device $d
# Umount existing mountpoints
for mp in $(sed -nr "s#^$d\S*\s+(\S+).*#\1#p" /proc/mounts); do
umount "$mp"
done
# Wipe the disk
fripost_wipe $d
# Create a disk label
/sbin/parted -s $d mklabel gpt
log "Created disklabel GPT for device $d"
# Don't make an array of these partitions, but keep the alignment
# regardless (at the expense of loosing some megabytes)
# Create a EFI partition if needed; otherwise, create a partition needed
# to put GRUB on GPT disklabels.
if [ -d /proc/efi -o -d /sys/firmware/efi ]; then
size=256M
name=efi
if [ $n -eq 1 ]; then
anna-install dosfstools-udeb
part_efi=$( fripost_mkpart $d $name $size +boot )
fripost_mkfs vfat $part_efi -F 32
else
fripost_mkpart $d $name $size
fi
else
size=8M
name=bios_grub
if [ $n -eq 1 ]; then
fripost_mkpart $d $name $size +bios_grub
else
fripost_mkpart $d $name $size
fi
fi
done
db_get fripost/encrypt
encrypt=$RET
# Install GRUB on the first device in case of an array
db_set grub-installer/bootdev "${device%% *}"
db_fset grub-installer/bootdev seen true
part_boot=
part_system=
# Create boot and system partitions
for d in $device; do
pb=$( fripost_mkpart $d boot 64M )
ps=$( fripost_mkpart $d system 100% )
part_boot="${part_boot:+$part_boot }$pb"
part_system="${part_system:+$part_system }$ps"
/sbin/parted -s $d align-check opt ${ps#$d} \
|| fatal "$ps is not aligned"
done
# Create an array on top of that
if [ ${raidLevel:-} -a ${raidActiveDev:-} ]; then
[ -d /dev/md ] || mkdir /dev/md
/sbin/modprobe -v md_mod
[ -e /proc/mdstat ] || fail "/proc/mdstat missing"
log "Creating RAID device /dev/md/boot with $part_boot"
mdadm --create /dev/md/boot \
-f -R -l raid$raidLevel -n $raidActiveDev \
$part_boot
part_boot=/dev/md/boot
wait_for_device $part_boot
log "Creating RAID device /dev/md/system with $part_system"
mdadm --create /dev/md/system \
-f -R -l raid$raidLevel -n $raidActiveDev \
$part_system
part_system=/dev/md/system
wait_for_device $part_system
# They were only meant to preserve alignment accross physical
# devices.
log "Remove dummy partitions"
for d in ${device#* }; do
# efi and bios_grub are only installed on the first disk
fripost_rmpart $d efi || true
fripost_rmpart $d bios_grub || true
done
# Note that we're assembling the array *before* encryption rather
# than the otherway around. dm_crypt being now multi-threaded, the
# order shouldn't impact performances (and that order is
# significantly simpler to configure).
fi
if [ $encrypt = true ]; then
# Encrypt the system partition. We choose the key length and digest
# depending on the architecture we're on; we use AES128 and SHA-256
# on 32-bits platforms, and AES256 and SHA-512 on 64-bits platforms.
arch=$(uname -m)
if [ "$arch" = x86_64 ]; then
keysize=256
hash=sha512
elif [ "$arch" = i386 -o "$arch" = i686 ]; then
keysize=128
hash=sha256
fi
# Note: XTS requires the key size to be doubled.
fripost_encrypt $part_system system_crypt \
--cipher aes-xts-plain64 --key-size $(( $keysize * 2 )) --hash $hash \
--iter-time 5000 --use-random
part_system=/dev/mapper/system_crypt
fi
# Ensure LVM2 is installed in the target chroot; create logical volumes
# for /, swap and /home.
apt-install lvm2 || true
vg=$(hostname)
pvcreate -ff -y $part_system
vgcreate $vg $part_system
lvcreate -L 5G -n root $vg
lvcreate -L 1G -n swap $vg
lvcreate -l 100%FREE -n home $vg
vgchange -ay $vg
# Format the partitions
fripost_mkfs ext2 $part_boot -E resize=512M -m1 -b 4096
fripost_mkfs ext4 /dev/$vg/root -b 4096
fripost_mkfs ext4 /dev/$vg/home -b 4096
mkswap /dev/$vg/swap
# Stuff the fstab and mount the devices in the target
fripost_fstab $part_boot /boot ext2 noatime
[ -d /proc/efi -o -d /sys/firmware/efi ] && \
fripost_fstab $part_efi /boot/efi vfat defaults
fripost_fstab /dev/$vg/root / ext4 noatime,errors=remount-ro
fripost_fstab /dev/$vg/swap none swap sw
fripost_fstab /dev/$vg/home /home ext4 noatime
fripost_mount_partitions
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