From 82c1b5a67b250afbcb96c9460ff006f3d02c76cd Mon Sep 17 00:00:00 2001
From: Guilhem Moulin <guilhem@fripost.org>
Date: Thu, 7 May 2015 13:44:44 +0200
Subject: Prefer BTRFS over LVM2.

---
 include/partition.sh                    | 66 ++++++++++++++++++---------------
 src/fripost-partman-udeb/debian/control |  2 +-
 2 files changed, 38 insertions(+), 30 deletions(-)

diff --git a/include/partition.sh b/include/partition.sh
index 10c17a0..35f259a 100755
--- a/include/partition.sh
+++ b/include/partition.sh
@@ -85,16 +85,26 @@ encrypt=$RET
 db_set  grub-installer/bootdev "${device%% *}"
 db_fset grub-installer/bootdev seen true
 
+part_efi=
 part_boot=
+part_swap=
 part_system=
 # Create boot and system partitions
 for d in $device; do
-    pb=$( 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 "$ps is not aligned"
+    p=$( fripost_mkpart $d boot 64M )
+    part_boot="${part_boot:+$part_boot }$p"
+
+    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
@@ -106,6 +116,11 @@ if [ ${raidLevel:-} ]; then
     fripost_mdadm_create "$part_boot" -f -R -l $raidLevel \
         ${raidNumActiveDevices:+-n $raidNumActiveDevices} $devices
 
+    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 \
@@ -148,31 +163,24 @@ if [ $encrypt = true ]; then
 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    # FIXME
-lvcreate -L 1G       -n swap $vg    # FIXME
-lvcreate -l 100%FREE -n home $vg    # FIXME
-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
+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 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_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
diff --git a/src/fripost-partman-udeb/debian/control b/src/fripost-partman-udeb/debian/control
index 355bc68..94e76f6 100644
--- a/src/fripost-partman-udeb/debian/control
+++ b/src/fripost-partman-udeb/debian/control
@@ -8,7 +8,7 @@ Package: fripost-partman
 XC-Package-Type: udeb
 Architecture: any
 Depends: cdebconf-udeb, parted-udeb, xfsprogs-udeb, hw-detect, md-modules,
- mdadm-udeb, lvm2-udeb, dmsetup-udeb, ntfstools-udeb, xfs-modules,
+ mdadm-udeb, btrfs-tools-udeb, dmsetup-udeb, ntfstools-udeb, xfs-modules,
  ext2-modules, ext3-modules, openssh-server-udeb, cryptsetup-udeb,
  crypto-dm-modules, ${misc:Depends}, ${shlibs:Depends}
 Provides: created-fstab, made-filesystems, mounted-partitions,
-- 
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