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#!/bin/sh
# Simple partitioning shell script.
# Copyright © 2013,2014 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/>.
# On most installations it should be enough to change what is marked as
# 'FIXME'.
set -ue
. /lib/fripost-partman/base.sh
# Configuration for a single disk
device=$(fripost_list_devices | head -1)
raidLevel=
# Configuration for a RAID array
#device='/dev/sda /dev/sdb' # FIXME
#raidLevel=raid1 # raid level FIXME
#raidNumActiveDevices=2 # number of active devices in the array FIXME
sed -nr "\#^/# s/\s.*//p" /proc/swaps | while read s; do swapoff "$s"; done
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_efi=
part_boot=
part_swap=
part_system=
# Create boot and system partitions
for d in $device; do
if [ $encrypt = true ]; then
# Don't use a separate partition for /boot if the disk is unencrypted
p=$( fripost_mkpart $d boot 256M )
part_boot="${part_boot:+$part_boot }$p"
fi
p=$( fripost_mkpart $d swap 1G ) # FIXME
part_swap="${part_swap:+$part_swap }$p"
/sbin/parted -s $d align-check opt ${p#$d} \
|| fatal "$p is not aligned"
p=$( fripost_mkpart $d system 100% )
part_system="${part_system:+$part_system }$p"
/sbin/parted -s $d align-check opt ${p#$d} \
|| fatal "$p is not aligned"
log "Done with device $d"
done
# Create an array on top of that
if [ ${raidLevel:-} ]; then
[ -d /dev/md ] || mkdir /dev/md
if [ "${part_boot:-}" ]; then
devices="$part_boot"
part_boot=/dev/md/boot
fripost_mdadm_create "$part_boot" -f -R -l $raidLevel \
${raidNumActiveDevices:+-n $raidNumActiveDevices} $devices
fi
devices="$part_swap"
part_swap=/dev/md/swap
fripost_mdadm_create "$part_swap" -f -R -l raid0 \
${raidNumActiveDevices:+-n $raidNumActiveDevices} $devices
devices="$part_system"
part_system=/dev/md/system
fripost_mdadm_create "$part_system" -f -R -l $raidLevel \
${raidNumActiveDevices:+-n $raidNumActiveDevices} $devices
# 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 $part_system luksRoot \
--cipher=aes-xts-plain64 --key-size=$(( $keysize * 2 )) --hash=$hash \
--iter-time=5000 --use-random
part_system=/dev/mapper/luksRoot
/lib/cryptsetup/scripts/decrypt_derived luksRoot \
| cryptsetup luksFormat $part_swap --cipher=aes-xts-plain64 --hash=$hash --key-file=-
/lib/cryptsetup/scripts/decrypt_derived luksRoot \
| cryptsetup luksOpen $part_swap luksSwap --key-file=-
fripost_crypttab_addentry luksSwap "$part_swap" luksRoot luks,keyscript=/lib/cryptsetup/scripts/decrypt_derived
part_swap=/dev/mapper/luksSwap
fi
# Format the partitions
fripost_mkfs ext2 "$part_boot" -F -E resize=512M -m1 -b 4096
fripost_mkfs btrfs "$part_system" -f
mkswap "$part_swap"
# Create BTRFS subvolumes
mkdir -p /target
apt-install btrfs-tools || true
mount -t btrfs -o compress=lzo "$part_system" /target
btrfs subvol create /target/@
btrfs subvol create /target/@home
umount /target
# Stuff the fstab and mount the devices in the target
fripost_fstab "$part_boot" /boot ext2 defaults
fripost_fstab "$part_efi" /boot/efi vfat defaults
fripost_fstab "$part_system" / btrfs compress=lzo,subvol=@
fripost_fstab "$part_system" /home btrfs compress=lzo,subvol=@home
fripost_fstab "$part_swap" none swap sw
fripost_mount_partitions
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