iankelling.org Git - automated-distro-installer/blob - fai/config/hooks/partition.DEFAULT

   1 #!/bin/bash -x
   2 # Copyright (C) 2016 Ian Kelling
   3
   4 # This program is free software; you can redistribute it and/or
   5 # modify it under the terms of the GNU General Public License
   6 # as published by the Free Software Foundation; either version 2
   7 # of the License, or (at your option) any later version.
   8
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program; if not, write to the Free Software
  16 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  17
  18 PS4='+ $LINENO '
  19 set -eE -o pipefail
  20 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
  21
  22 if [[ $EUID != 0 ]]; then
  23   echo "$0: error: need to run as root" >&2
  24   exit 1
  25 fi
  26
  27 # for calling outside of FAI:
  28 # fai-redep
  29 # s
  30 # source /b/fai/fai-wrapper
  31 # - set any appropriate classes with: fai-setclass OPT1... which sets CLASS_OPT1=true...
  32 #   or run eval-fai-classfile FILE
  33 # export luks_dir=/q/root/luks
  34 #
  35 # OPTIONS:
  36 #
  37 # environment variables:
  38 #
  39 # HOSTNAME: if frodo, we exclude 2 devices from the /boot array, which
  40 # the bios does not see. if demohost, we set the luks password to just
  41 # 'x'.
  42 #
  43 # SPECIAL_DISK: For use outside of fai. A base disk name like
  44 # /dev/sdk. If set, we just cryptsetup and partition this one disk then
  45 # exit. This is useful for partitioning a disk in preparation to replace
  46 # a failed or failing disk from a raid10 array.
  47 #
  48 # classes:
  49 #
  50 # REPARTITION: forces repartitioning even if we detect the proper amount
  51 # of partitions already exist.
  52 #
  53 # NOWIPE: use existing subvolumes if they exist
  54 #
  55 # ROTATIONAL: forces to install onto hdds instead of sdds. normally sdds
  56 # are chosen if they exist.
  57 #
  58 # PARTITION_PROMPT: command line prompt before partitioning
  59 #
  60 # RAID0: forces raid0 filesystem. Normally with 4+ devices, we use
  61 # raid10.
  62 # RAID1: forces raid1 filesystem.
  63
  64 if [[ $SPECIAL_DISK ]]; then
  65   export CLASS_REPARTITION=true
  66 fi
  67
  68 # # fai's setup-storage won't do btrfs on luks,
  69 # # so we do it ourself :)
  70 # inspiration taken from files in fai-setup-storage package
  71
  72 # if we are not running in fai, skiptask won't be defined, so carry on.
  73 skiptask partition || ! type skiptask
  74
  75 if ! type -p devbyid; then
  76   for d in $FAI/distro-install-common \
  77                /a/bin/fai/fai/config/distro-install-common $FAI $PWD; do
  78     [[ -d $d ]] || continue
  79     if [[ -e $d/devbyid ]]; then
  80       devbyid=$d/devbyid
  81       devbyid() { $devbyid "$@"; }
  82       break
  83     fi
  84   done
  85   if [[ ! $devbyid ]]; then
  86     echo "$0: error: failed to find devbyid script" >&2
  87     exit 1
  88   fi
  89 fi
  90
  91
  92
  93 #### begin configuration
  94
  95 rootn=1
  96 swapn=2
  97 bootn=3
  98 efin=4
  99 # ext partition so grub can write persistent variables,
 100 # so it can do a one time boot. grub can't write to
 101 # btrfs or any cow fs because it's more
 102 # more complicated to do and they don't want to.
 103 grub_extn=5
 104 # bios boot partition,
 105 # https://wiki.archlinux.org/index.php/GRUB
 106 bios_grubn=6
 107 lastn=$bios_grubn
 108
 109
 110
 111 ##### end configuration
 112
 113
 114 add-part() { # add partition suffix to $dev
 115   local d ret
 116   if [[ $# == 1 ]]; then
 117     d=$dev
 118     part=$1
 119   else
 120     d=$1
 121     part=$2
 122   fi
 123   if [[ $d == /dev/disk/by-id/* ]]; then
 124     ret=$d-part$part
 125   else
 126     ret=$d$part
 127   fi
 128   echo $ret
 129 }
 130
 131 bootdev() { add-part $@ $bootn; }
 132 rootdev() { add-part $@ $rootn; }
 133 swapdev() { add-part $@ $swapn; }
 134 efidev() { add-part $@ $efin; }
 135 grub_extdev() { add-part $@ $grub_extn; }
 136 bios_grubdev() { add-part $@ $bios_grubn; }
 137
 138 crypt-dev() { echo /dev/mapper/crypt_dev_${1##*/}; }
 139 crypt-name() { echo crypt_dev_${1##*/}; }
 140 root-cryptdev() { crypt-dev $(rootdev $@); }
 141 swap-cryptdev() { crypt-dev $(swapdev $@); }
 142 root-cryptname() { crypt-name $(rootdev $@); }
 143 swap-cryptname() { crypt-name $(swapdev $@); }
 144
 145 ##### end function defs
 146
 147 if ifclass REPARTITION; then
 148   partition=true # force a full wipe
 149 else
 150   partition=false # change to true to force a full wipe
 151 fi
 152 if ifclass NOWIPE; then
 153   wipe=false
 154 else
 155   wipe=true
 156 fi
 157
 158 if ((`nproc` > 2)); then
 159   mopts=,compress=zstd
 160 fi
 161
 162 declare -A disk_excludes
 163 if ! ifclass USE_MOUNTED; then
 164   ## ignore disks that are mounted, eg when running from fai-cd
 165   while read -r l; do
 166     eval "$l"
 167     if [[ ! $PKNAME ]]; then
 168       PKNAME="$KNAME"
 169     fi
 170     if [[ $MOUNTPOINT ]]; then
 171       disk_excludes[$PKNAME]=true
 172     fi
 173   done < <(lsblk -nP -o KNAME,MOUNTPOINT,PKNAME)
 174 fi
 175
 176 hdds=()
 177 ssds=()
 178 # this excludes usb. note: i may encounter some other type in the future.
 179 for disk in $(lsblk -do name,tran -n | awk '$2 ~ "^(sata|nvme)$" { print $1 }'); do
 180   if [[ ${disk_excludes[$disk]} ]]; then
 181     continue
 182   fi
 183   case $(cat /sys/block/$disk/queue/rotational) in
 184     0) ssds+=(/dev/$disk) ;;
 185     1) hdds+=(/dev/$disk) ;;
 186     *) echo "$0: error: unknown /sys/block/$disk/queue/rotational: \
 187 $(cat $disk/queue/rotational)"; exit 1 ;;
 188   esac
 189 done
 190
 191 # install all ssds, or if there are none, all hdds.
 192 # Note, usb flash disks are seen as rotational, which is
 193 # very odd, but convenient for ignoring them here.
 194 # TODO: find a reliable way to ignore them.
 195 if ! ifclass ROTATIONAL && (( ${#ssds[@]} > 0 )); then
 196   short_devs=( ${ssds[@]} )
 197 else
 198   short_devs=( ${hdds[@]} )
 199 fi
 200
 201 # check if the partitions exist have the right filesystems
 202 #blkid="$(blkid -s TYPE)"
 203 for dev in ${short_devs[@]}; do
 204   if $partition; then break; fi
 205   y=$(readlink -f $dev)
 206   arr=($y[0-9])
 207   [[ ${#arr[@]}  == "$lastn" ]] || partition=true
 208   for (( i=1; i <= lastn; i++ )); do
 209     [[ -e ${dev}$i ]] || partition=true
 210   done
 211   # On one system, blkid is missing some partitions.
 212   # maybe we need a flag, like FUZZY_BLKID or something, so we
 213   # can check that at least some exist.
 214   # for x in "`rootdev`: TYPE=\"crypto_LUKS\"" "`bootdev`: TYPE=\"btrfs\""; do
 215   #     echo "$blkid" | grep -Fx "$x" &>/dev/null || partition=true
 216   # done
 217 done
 218
 219 if $partition && ifclass PARTITION_PROMPT; then
 220   echo "Press any key except ctrl-c to continue and partition these drives:"
 221   echo "  ${short_devs[*]}"
 222   read -r
 223 fi
 224
 225 devs=()
 226 shopt -s extglob
 227 for short_dev in ${short_devs[@]}; do
 228   devs+=($(devbyid $short_dev))
 229 done
 230 if [[ ! ${devs[0]} ]]; then
 231   echo "$0: error: failed to detect devs" >&2
 232   exit 1
 233 fi
 234
 235 boot_space=0
 236 first=false
 237 boot_devs=()
 238 for dev in ${devs[@]}; do
 239   if ifclass frodo; then
 240     # I ran into a machine where the bios doesn't know about some disks,
 241     # so 1st stage of grub also doesn't know about them.
 242     # Also, grub does not support mounting degraded btrfs as far as
 243     # I can tell with some googling.
 244     # From within an arch install env, I could detect them by noting
 245     # their partitions were mixed with the next disk in /dev/disk/by-path,
 246     # and I have mixed model disks, and I could see the 8 models which showed
 247     # up in the bios, and thus see which 2 models were missing.
 248     # hdparm -I /dev/sdh will give model info in linux.
 249     # However, in fai on jessie, /dev/disk/by-path dir doesn't exist,
 250     # and I don't see another way, so I'm hardcoding them.
 251     # We still put grub on them and partition them the same, for uniformity
 252     # and in case they get moved to a system that can recognize them,
 253     # we just exclude them from the boot filesystem.
 254     cd /dev/disk/by-id/
 255     bad_disk=false
 256     for id in ata-TOSHIBA_MD04ACA500_8539K4TQFS9A \
 257                 ata-TOSHIBA_MD04ACA500_Y5IFK6IJFS9A; do
 258       if [[ $(readlink -f $id) == "$(readlink -f $dev)" ]]; then
 259         bad_disk=true
 260         break
 261       fi
 262     done
 263     $bad_disk || boot_devs+=($(bootdev))
 264   else
 265     boot_space=$(( boot_space + $(parted -m $dev unit MiB print | \
 266                                     sed -nr "s#^/dev/[^:]+:([0-9]+).*#\1#p") - 1))
 267     boot_devs+=($(bootdev))
 268   fi
 269   if [[ $boot_devs && $first ]]; then
 270     first_efi=$(efidev)
 271     first_grub_extdev=$(grub_extdev)
 272     first=false
 273   fi
 274 done
 275
 276 even_raid=false
 277 if ifclass RAID0 || (( ${#boot_devs[@]} == 1 )); then
 278   raid_level=0
 279 elif ifclass RAID1 || (( ${#boot_devs[@]} <= 3 )); then
 280   if (( ${#boot_devs[@]} == 2 )); then
 281     even_raid=true
 282   fi
 283   raid_level=1
 284 else
 285   raid_level=10
 286 fi
 287
 288 ### Begin calculate boot partition space
 289 # due to raid duplication
 290 case $raid_level in
 291   1*) boot_space=$(( boot_space / 2 )) ;;
 292 esac
 293 if (( boot_space > 60000 )); then
 294   # this is larger than needed for several /boot subvols,
 295   # becuase I keep a minimal debian install on it for
 296   # recovery needs and for doing pxe-kexec.
 297   boot_mib=10000
 298 elif (( boot_space > 30000 )); then
 299   boot_mib=$(( 5000 + (boot_space - 30000) / 2 ))
 300 else
 301   # Small vms don't have room for /boot recovery.  With 3 kernels
 302   # installed, i'm using 132M on t8, so this seems like plenty of
 303   # room. note: rhel 8 recomments 1g for /boot.
 304   boot_mib=500
 305   #
 306 fi
 307 case $raid_level in
 308   1*) boot_mib=$(( boot_mib * 2 )) ;;
 309 esac
 310 ### end calculate boot partition space
 311
 312
 313
 314 if [[ ! $DISTRO ]]; then
 315   if ifclass VOL_BUSTER_BOOTSTRAP; then
 316     DISTRO=debianbuster_bootstrap
 317   elif ifclass VOL_STRETCH; then
 318     DISTRO=debianstretch
 319   elif ifclass VOL_BUSTER; then
 320     DISTRO=debianbuster
 321   elif ifclass VOL_BULLSEYE; then
 322     DISTRO=debianbullseye
 323   elif ifclass VOL_TESTING; then
 324     DISTRO=debiantesting
 325   elif ifclass VOL_XENIAL; then
 326     DISTRO=ubuntuxenial
 327   elif ifclass VOL_BIONIC; then
 328     DISTRO=ubuntubionic
 329   elif ifclass VOL_FOCAL; then
 330     DISTRO=ubuntufocal
 331   elif ifclass VOL_FLIDAS; then
 332     DISTRO=trisquelflidas
 333   elif ifclass VOL_ETIONA; then
 334     DISTRO=trisqueletiona
 335   elif ifclass VOL_NABIA; then
 336     DISTRO=trisquelnabia
 337   else
 338     echo "PARTITIONER ERROR: no distro class/var set" >&2
 339     exit 1
 340   fi
 341 fi
 342 first_boot_dev=${boot_devs[0]}
 343
 344
 345 bpart() { # btrfs a partition
 346   case $raid_level in
 347     0) mkfs.btrfs -f $@ ;;
 348     1) mkfs.btrfs -f -m raid1 -d raid1 $@ ;;
 349     10) mkfs.btrfs -f -m raid10 -d raid10 $@ ;;
 350   esac
 351 }
 352
 353
 354 if [[ ! $luks_dir ]]; then
 355   # see README for docs about how to create these
 356   luks_dir=$FAI/distro-install-common/luks
 357 fi
 358
 359 luks_file=$luks_dir/host-$HOSTNAME
 360 if [[ ! -e $luks_file ]]; then
 361   hostkeys=($luks_dir/host-*)
 362   # if there is only one key, we might be deploying somewhere
 363   # where dhcp doesnt give us a proper hostname, so use that.
 364   if [[ ${#hostkeys[@]} == 1 && -e ${hostkeys[0]} ]]; then
 365     luks_file=${hostkeys[0]}
 366   else
 367     echo "$0: error: no key for hostname at $luks_file" >&2
 368     exit 1
 369   fi
 370 fi
 371
 372 # # note, corresponding changes in /b/ds/keyscript-{on,off}
 373 if ifclass demohost; then
 374   lukspw=x
 375 elif [[ -e $luks_dir/$HOSTNAME ]]; then
 376   lukspw=$(cat $luks_dir/$HOSTNAME)
 377 else
 378   lukspw=$(cat $luks_dir/iank)
 379 fi
 380
 381
 382 first_root_crypt=$(root-cryptdev ${devs[0]})
 383
 384 # 1.5 x based on https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Installation_Guide/sect-disk-partitioning-setup-x86.html#sect-custom-partitioning-x86
 385 swap_mib=$(( $(grep ^MemTotal: /proc/meminfo | \
 386                  awk '{print $2}') * 3/(${#devs[@]} * 2 ) / 1024 ))
 387
 388 mkdir -p /tmp/fai
 389 root_devs=()
 390 for dev in ${devs[@]}; do
 391   root_devs+=($(rootdev))
 392 done
 393 shopt -s nullglob
 394 if $partition; then
 395
 396   ### begin wipefs
 397   if [[ ! $SPECIAL_DISK ]]; then
 398     for dev in ${devs[@]}; do
 399       # if we repartition to the same as an old partition,
 400       # we don't want any old fses hanging around.
 401       for (( i=1; i <= lastn; i++ )); do
 402         x=$(add-part $dev $i)
 403         [[ -e $x ]] || continue
 404         count_down=10
 405         # wipefs has failed, manual run works, google suggests timing issue
 406         while ! wipefs -a $x; do
 407           sleep 2
 408           count_down=$((count_down - 1))
 409           (( count_down > 0 )) || exit 1
 410         done
 411       done
 412     done
 413   fi
 414   ### end wipefs
 415
 416
 417   if $even_raid; then
 418     for dev in ${devs[@]}; do
 419       disk_mib=$(( $(parted -m $dev unit MiB print | \
 420                        sed -nr "s#^/dev/[^:]+:([0-9]+).*#\1#p") - 1))
 421       if [[ ! min_disk_mib ]] || (( disk_mib < min_disk_mib )); then
 422         min_disk_mib=$disk_mib
 423       fi
 424     done
 425   fi
 426
 427   for dev in ${devs[@]}; do
 428     if [[ $SPECIAL_DISK ]]; then
 429       dev=$(devbyid $SPECIAL_DISK)
 430     fi
 431
 432     # parted will round up the disk size. Do -1 so we can have
 433     # fully 1MiB unit partitions for easy resizing of the last partition.
 434     # Otherwise we would pass in -0 for the end argument for the last partition.
 435     #
 436     # Note: parted print error output is expected. example:
 437     # Error: /dev/vda: unrecognised disk label
 438     if $even_raid; then
 439       disk_mib=$min_disk_mib
 440     else
 441       disk_mib=$(( $(parted -m $dev unit MiB print | \
 442                        sed -nr "s#^/dev/[^:]+:([0-9]+).*#\1#p") - 1))
 443     fi
 444     root_end=$(( disk_mib - swap_mib - boot_mib /  ${#boot_devs[@]} ))
 445     swap_end=$(( root_end + swap_mib))
 446
 447     parted -s $dev mklabel gpt
 448     # MiB because parted complains about alignment otherwise.
 449     pcmd="parted -a optimal -s -- $dev"
 450     $pcmd mkpart primary ext3 524MiB ${root_end}MiB
 451     # without naming, systemd gives us misc errors like:
 452     # dev-disk-by\x2dpartlabel-primary.device: Dev dev-disk-by\x2dpartlabel-primary.device appeared twice
 453     $pcmd name $rootn root
 454     # normally a swap is type "linux-swap", but this is encrypted swap. using that
 455     # label will confuse systemd.
 456     $pcmd mkpart primary "" ${root_end}MiB ${swap_end}MiB
 457     $pcmd name $swapn swap
 458     $pcmd mkpart primary "" ${swap_end}MiB ${disk_mib}MiB
 459     $pcmd name $bootn boot
 460     # eufi = bloated, half a gig gimme a break.
 461     $pcmd mkpart primary "fat32" 12MiB 524MiB
 462     $pcmd name $efin efi
 463     $pcmd set $efin esp on
 464     # note, this is shown here: https://support.system76.com/articles/bootloader/
 465     # but not mentioned https://wiki.archlinux.org/index.php/EFI_system_partition
 466     # probably not needed
 467     $pcmd set $bootn boot on
 468     # i only need a few k, but googling min size,
 469     # I found someone saying that gparted required
 470     # required at least 8 because of their hard drive cylinder size.
 471     # And 8 is still very tiny.
 472     $pcmd mkpart primary "ext2" 4MiB 12MiB
 473     $pcmd name $grub_extn grubext
 474     # gpt ubuntu cloud image uses ~4 mb for this partition. fai uses 1 MiB.
 475     # so, I use 3, whatever.
 476     # note: parted manual saying cheap flash media
 477     # should to start at 4.
 478     $pcmd mkpart primary "" 1MiB 4MiB
 479     $pcmd name $bios_grubn biosgrub
 480     $pcmd set $bios_grubn bios_grub on
 481     $pcmd set $bootn boot on # generally not needed on modern systems
 482     # the mkfs failed before on a vm, which prompted me to add
 483     # sleep .1
 484     # then it failed again on a physical machine
 485     # with:
 486     # Device /dev/disk/by-id/foo doesn't exist or access denied,
 487     # so I added a wait until it existed.
 488     # Then I added the mkfs.ext2, which claimed to succeed,
 489     # but then couldn't be found upon reboot. In that case we didn't
 490     # wait at all. So I've added a 3 second minimum wait.
 491     sleep 3
 492     secs=0
 493     while [[ ! -e $(rootdev) ]] && (( secs < 10 )); do
 494       sleep 1
 495       secs=$((secs +1))
 496     done
 497
 498     mkfs.fat -F32 $(efidev)
 499
 500     # Holds just a single file, rarely written, so
 501     # use ext2, like was often used for the /boot partition.
 502     # This exists because grub can only persist data to a non-cow fs.
 503     # And we use persisting a var in grub to do a one time boot.
 504     # We could pass the data on the kernel command line and persist it
 505     # to grubenv after booting, but that relies on the boot always succeeding.
 506     # This is just a bit more robust, and it could work for booting
 507     # into ipxe which can't persist data, if we ever got that working.
 508     mkfs.ext2 $(grub_extdev)
 509     # when we move to newer than trisquel 9, we can remove
 510     # --type luks1. We can also check on cryptsetup --help | less /compil
 511     # to see about the other settings. Default in debian 9 is luks2.
 512     # You can convert from luks2 to luks 1 by adding a temporary key:
 513     # cryptsetup luksAddKey --pbkdf pbkdf2
 514     # then remove the new format keys with cryptsetup luksRemoveKey
 515     # then cryptsetup convert DEV --type luks1, then readd old keys and remove temp.
 516     yes YES | cryptsetup luksFormat $(rootdev) $luks_file \
 517                          --type luks1 -c aes-cbc-essiv:sha256 -s 256 || [[ $? == 141 ]]
 518     yes "$lukspw" | \
 519       cryptsetup luksAddKey --key-file $luks_file \
 520                  $(rootdev) || [[ $? == 141 ]]
 521     # background: Keyfile and password are treated just
 522     # like 2 ways to input a passphrase, so we don't actually need to have
 523     # different contents of keyfile and passphrase, but it makes some
 524     # security sense to a really big randomly generated passphrase
 525     # as much as possible, so we have both.
 526     #
 527     # This would remove the keyfile.
 528     #    yes 'test' | cryptsetup luksRemoveKey /dev/... \
 529       #                            /key/file || [[ $? == 141 ]]
 530
 531     cryptsetup luksOpen $(rootdev) $(root-cryptname) \
 532                --key-file $luks_file
 533
 534     if [[ $SPECIAL_DISK ]]; then
 535       exit 0
 536     fi
 537   done
 538   ls -la /dev/btrfs-control # this was probably for debugging...
 539   sleep 1
 540   bpart $(for dev in ${devs[@]}; do root-cryptdev; done)
 541   bpart ${boot_devs[@]}
 542 else
 543   for dev in ${devs[@]}; do
 544     if [[ -e /dev/mapper/$(root-cryptname) ]]; then
 545       continue
 546     fi
 547     cryptsetup luksOpen $(rootdev) $(root-cryptname) \
 548                --key-file $luks_file
 549   done
 550   sleep 1
 551 fi
 552
 553
 554 if $wipe && [[ $DISTRO != debianbuster_bootstrap ]]; then
 555   # bootstrap distro doesn't use separate encrypted root.
 556   mount -o subvolid=0 $first_root_crypt /mnt
 557   # systemd creates subvolumes we want to delete.
 558   s=($(btrfs subvolume list --sort=-path /mnt |
 559          sed -rn "s#^.*path\s*(root_$DISTRO/\S+)\s*\$#\1#p"))
 560   for subvol in ${s[@]}; do btrfs subvolume delete /mnt/$subvol; done
 561   btrfs subvolume set-default 0 /mnt
 562   [[ ! -e /mnt/root_$DISTRO ]] || btrfs subvolume delete /mnt/root_$DISTRO
 563
 564   ## create subvols ##
 565   cd /mnt
 566
 567   btrfs subvolume create root_$DISTRO
 568
 569   # could set default subvol like this, but no reason to.
 570   # btrfs subvolume set-default \
 571     #       $(btrfs subvolume list . | grep "root_$DISTRO$" | awk '{print $2}') .
 572
 573   # no cow on the root filesystem. it's setup is fully scripted,
 574   # if it's messed up, we will just recreated it,
 575   # and we can get better perf with this.
 576   # I can't remember exactly why, but this is preferable to mounting with
 577   # -o nodatacow, I think because subvolumes inherit that.
 578   chattr -Rf +C root_$DISTRO
 579   cd /
 580   umount /mnt
 581 fi
 582
 583 mount -o subvolid=0 $first_boot_dev /mnt
 584 cd /mnt
 585 btrfs subvolume set-default 0 /mnt # already default, just ensuring it.
 586
 587 # for libreboot systems. grub2 only reads from subvolid=0
 588 mkdir -p /mnt/grub2
 589 cp $FAI/distro-install-common/libreboot_grub.cfg /mnt/grub2
 590
 591 if [[ $DISTRO == debianbuster_bootstrap ]]; then
 592   # this is just convenience for the libreboot_grub config
 593   # so we can glob the other ones easier.
 594   boot_vol=$DISTRO
 595 else
 596   boot_vol=boot_$DISTRO
 597 fi
 598 if $wipe && [[ -e /mnt/$boot_vol ]]; then
 599   btrfs subvolume delete /mnt/$boot_vol
 600 fi
 601 if [[ ! -e /mnt/$boot_vol ]]; then
 602   btrfs subvolume create $boot_vol
 603 fi
 604 cd /
 605 umount /mnt
 606 ## end create subvols ##
 607
 608 dev=${boot_devs[0]}
 609 mount $first_grub_extdev /mnt
 610 grub-editenv /mnt/grubenv set did_fai_check=true
 611 grub-editenv /mnt/grubenv set last_boot=/$boot_vol
 612 umount /mnt
 613
 614 if [[ $DISTRO == debianbuster_bootstrap ]]; then
 615   cat > /tmp/fai/fstab <<EOF
 616 $first_boot_dev  /  btrfs  noatime,subvol=$boot_vol  0 0
 617 EOF
 618   cat >/tmp/fai/disk_var.sh <<EOF
 619 BOOT_DEVICE="${short_devs[@]}"
 620 ROOT_PARTITION=$first_boot_dev
 621 EOF
 622 else
 623   # note, fai creates the mountpoints listed here
 624   cat > /tmp/fai/fstab <<EOF
 625 $first_root_crypt  /  btrfs          noatime,subvol=root_$DISTRO$mopts  0 0
 626 $first_root_crypt  /mnt/root  btrfs  nofail,noatime,subvolid=0$mopts  0 0
 627 $first_boot_dev  /boot  btrfs        nofail,noatime,subvol=$boot_vol  0 0
 628 $first_efi  /boot/efi  vfat          nofail  0 0
 629 $first_boot_dev  /mnt/boot  btrfs    nofail,noatime,subvolid=0  0 0
 630 EOF
 631   swaps=()
 632   rm -f /tmp/fai/crypttab
 633   for dev in ${devs[@]}; do
 634     swaps+=($(swap-cryptname))
 635     cat >>/tmp/fai/crypttab <<EOF
 636 $(root-cryptname) $(rootdev)  none  keyscript=/root/keyscript,discard,luks,initramfs
 637 $(swap-cryptname) $(swapdev)  /dev/urandom  swap,cipher=aes-xts-plain64,size=256,hash=ripemd160
 638 EOF
 639     cat >> /tmp/fai/fstab <<EOF
 640 $(swap-cryptdev)  none  swap  nofail,sw  0 0
 641 EOF
 642   done
 643
 644   # fai would do this:
 645   #BOOT_DEVICE=\${BOOT_DEVICE:-"${devs[0]}"}
 646
 647   # note: swaplist seems to do nothing.
 648   cat >/tmp/fai/disk_var.sh <<EOF
 649 BOOT_DEVICE="${short_devs[@]}"
 650 BOOT_PARTITION=\${BOOT_PARTITION:-$first_boot_dev}
 651 # ROOT_PARTITIONS is added by me, used in arch setup.
 652 ROOT_PARTITIONS="${root_devs[@]}"
 653 ROOT_PARTITION=\${ROOT_PARTITION:-$first_root_crypt}
 654 SWAPLIST=\${SWAPLIST:-"${swaps[@]}"}
 655 EOF
 656 fi