2 # Copyright (C) 2016 Ian Kelling
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.
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.
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.
19 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
21 # # fai's setup-storage won't do btrfs on luks,
22 # # so we do it ourself :)
23 # inspiration taken from files in fai-setup-storage package
26 skiptask partition ||
! type skiptask
# for running not in fai
28 #### begin configuration
33 # ext partition so grub can write persistent variables,
34 # so it can do a one time boot. grub can't write to
35 # btrfs or any cow fs because it's more
36 # more complicated to do and they don't want to.
38 # bios boot partition,
39 # https://wiki.archlinux.org/index.php/GRUB
42 # this is larger than needed for several /boot subvols,
43 # becuase I keep a minimal debian install on it, for
44 # recovery needs, and for doing pxe-kexec.
48 ##### end configuration
51 add-part
() { # add partition suffix to $dev
53 if [[ $# == 1 ]]; then
60 if [[ $d == /dev
/disk
/by-id
/* ]]; then
68 bootdev
() { add-part $@
$bootn; }
69 rootdev
() { add-part $@
$rootn; }
70 swapdev
() { add-part $@
$swapn; }
71 grub_extdev
() { add-part $@
$grub_extn; }
72 bios_grubdev
() { add-part $@
$bios_grubn; }
74 crypt-dev
() { echo /dev
/mapper
/crypt_dev_
${1##*/}; }
75 crypt-name
() { echo crypt_dev_
${1##*/}; }
76 root-cryptdev
() { crypt-dev $
(rootdev $@
); }
77 swap-cryptdev
() { crypt-dev $
(swapdev $@
); }
78 root-cryptname
() { crypt-name $
(rootdev $@
); }
79 swap-cryptname
() { crypt-name $
(swapdev $@
); }
82 for f
in $FAI/distro-install-common
/devbyid \
83 /a
/bin
/fai
/fai
/config
/distro-install-common
/devbyid
; do
84 if [[ -e $f ]]; then $f "$@"; fi
89 ##### end function defs
91 if ifclass REPARTITION
;then
92 partition
=true
# force a full wipe
94 partition
=false
# change to true to force a full wipe
102 for disk
in [sv
]d
[a-z
]; do
103 case $
(cat $disk/queue
/rotational
) in
104 0) ssds
+=(/dev
/$disk) ;;
105 1) hdds
+=(/dev
/$disk) ;;
106 *) echo "$0: error: unknown /sys/block/$disk/queue/rotational: \
107 $(cat $disk/queue/rotational)"; exit 1 ;;
111 # install all ssds, or if there are none, all hdds
112 if ! ifclass ROTATIONAL
&& (( ${#ssds[@]} > 0 )); then
113 short_devs
=( ${ssds[@]} )
115 short_devs
=( ${hdds[@]} )
118 # check if the partitions exist have the right filesystems
119 #blkid="$(blkid -s TYPE)"
120 for dev
in ${short_devs[@]}; do
121 if $partition; then break; fi
122 y
=$
(readlink
-f $dev)
124 [[ ${#arr[@]} == "${lastn}" ]] || partition
=true
125 for (( i
=1; i
<= lastn
; i
++ )); do
126 [[ -e ${dev}$i ]] || partition
=true
128 # On one system, blkid is missing some partitions.
129 # maybe we need a flag, like FUZZY_BLKID or something, so we
130 # can check that at least some exist.
131 # for x in "`rootdev`: TYPE=\"crypto_LUKS\"" "`bootdev`: TYPE=\"btrfs\""; do
132 # echo "$blkid" | grep -Fx "$x" &>/dev/null || partition=true
136 if $partition && ifclass PARTITION_PROMPT
; then
137 echo "Press any key except ctrl-c to continue and partition these drives:"
138 echo " ${short_devs[*]}"
144 for short_dev
in ${short_devs[@]}; do
145 devs
+=($
(devbyid
$short_dev))
151 for dev
in ${devs[@]}; do
152 if ifclass frodo
; then
153 # I ran into a machine where the bios doesn't know about some disks,
154 # so 1st stage of grub also doesn't know about them.
155 # Also, grub does not support mounting degraded btrfs as far as
156 # I can tell with some googling.
157 # From within an arch install env, I could detect them by noting
158 # their partitions were mixed with the next disk in /dev/disk/by-path,
159 # and I have mixed model disks, and I could see the 8 models which showed
160 # up in the bios, and thus see which 2 models were missing.
161 # hdparm -I /dev/sdh will give model info in linux.
162 # However, in fai on jessie, /dev/disk/by-path dir doesn't exist,
163 # and I don't see another way, so I'm hardcoding them.
164 # We still put grub on them and partition them the same, for uniformity
165 # and in case they get moved to a system that can recognize them,
166 # we just exclude them from the boot filesystem.
169 for id
in ata-TOSHIBA_MD04ACA500_8539K4TQFS9A \
170 ata-TOSHIBA_MD04ACA500_Y5IFK6IJFS9A
; do
171 if [[ $
(readlink
-f $id) == "$(readlink -f $dev)" ]]; then
176 $bad_disk || boot_devs
+=(`bootdev`)
178 boot_devs
+=(`bootdev`)
180 if [[ $boot_devs && $first ]]; then
181 first_grub_extdev
=`grub_extdev`
186 if ifclass RAID0 ||
(( ${#boot_devs[@]} < 4 )); then
190 # need double the space if we are raid 10, and then
191 # might as well give some extra.
192 boot_mib
=$
((boot_mib
* 3))
197 if [[ ! $DISTRO ]]; then
198 if ifclass VOL_STABLE_BOOTSTRAP
; then
199 DISTRO
=debianstable_bootstrap
200 elif ifclass VOL_STRETCH
; then
202 elif ifclass VOL_STABLE
; then
204 elif ifclass VOL_XENIAL
; then
206 elif ifclass VOL_BELENOS
; then
207 DISTRO
=trisquelbelenos
208 elif ifclass VOL_FLIDAS
; then
209 DISTRO
=trisquelflidas
211 echo "PARTITIONER ERROR: no distro class/var set" >&2
215 first_boot_dev
=${boot_devs[0]}
218 bpart
() { # btrfs a partition
220 0) mkfs.btrfs
-f $@
;;
221 10) mkfs.btrfs
-f -m raid10
-d raid10 $@
;;
226 # keyfiles generated like:
227 # head -c 2048 /dev/urandom | od | s dd of=/q/root/luks/host-demohost
228 luks_dir
=${LUKS_DIR:-/var/lib/fai/config/distro-install-common/luks}
230 if [[ ! -e $luks_dir/host-
$HOSTNAME ]]; then
231 echo "$0: error: no key for hostname at $luks_dir/host-$HOSTNAME" >&2
236 lukspw
=$
(cat $luks_dir/traci
)
238 lukspw
=$
(cat $luks_dir/iank
)
240 if ifclass demohost
; then
245 first_root_crypt
=$
(root-cryptdev
${devs[0]})
247 # 1.5 x based on https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Installation_Guide/sect-disk-partitioning-setup-x86.html#sect-custom-partitioning-x86
248 swap_mib
=$
(( $
(grep ^MemTotal
: /proc
/meminfo | \
249 awk '{print $2}') * 3/(${#devs[@]} * 2 ) / 1024 ))
253 for dev
in ${devs[@]}; do
254 root_devs
+=(`rootdev`)
258 for dev
in ${devs[@]}; do
259 # if we repartition to the same as an old partition,
260 # we don't want any old fses hanging around.
261 for (( i
=1; i
<= lastn
; i
++ )); do
262 x
=$
(add-part
$dev $i)
263 [[ -e $x ]] ||
continue
265 # wipefs has failed, manual run works, google suggests timing issue
266 while ! wipefs
-a $x; do
268 count_down
=$
((count_down
- 1))
269 (( count_down
> 0 )) ||
exit 1
273 for dev
in ${devs[@]}; do
274 # parted will round up the disk size. Do -1 so we can have
275 # fully 1MiB unit partitions for easy resizing of the last partition.
276 # Otherwise we would pass in -0 for the end argument for the last partition.
278 # parted print error output is expected. example:
279 # Error: /dev/vda: unrecognised disk label
280 disk_mib
=$
(( $
(parted
-m $dev unit MiB print | \
281 sed -nr "s#^/dev/[^:]+:([0-9]+).*#\1#p") - 1))
282 root_end
=$
(( disk_mib
- swap_mib
- boot_mib
/ ${#boot_devs[@]} ))
283 swap_end
=$
(( root_end
+ swap_mib
))
285 parted
-s $dev mklabel gpt
286 # MiB because parted complains about alignment otherwise.
287 pcmd
="parted -a optimal -s -- $dev"
288 $pcmd mkpart primary ext3
12MiB
${root_end}MiB
289 # without naming, systemd gives us misc errors like:
290 # dev-disk-by\x2dpartlabel-primary.device: Dev dev-disk-by\x2dpartlabel-primary.device appeared twice
291 $pcmd name
$rootn root
292 # normally a swap is type "linux-swap", but this is encrypted swap. using that
293 # label will confuse systemd.
294 $pcmd mkpart primary
"" ${root_end}MiB
${swap_end}MiB
295 $pcmd name
$swapn swap
296 $pcmd mkpart primary
"" ${swap_end}MiB
${disk_mib}MiB
297 $pcmd name
$bootn boot
298 # i only need a few k, but googling min size,
299 # I found someone saying that gparted required
300 # required at least 8 because of their hard drive cylinder size.
301 # And 8 is still very tiny.
302 $pcmd mkpart primary
"ext2" 4MiB
12MiB
303 $pcmd name
$grub_extn grubext
304 # gpt ubuntu cloud image uses ~4 mb for this partition. fai uses 1 MiB.
305 # so, I use 3, whatever.
306 # note: parted manual saying cheap flash media
307 # should to start at 4.
308 $pcmd mkpart primary
"" 1MiB
4MiB
309 $pcmd name
$bios_grubn biosgrub
310 $pcmd set $bios_grubn bios_grub on
311 $pcmd set $bootn boot on
# generally not needed on modern systems
312 # the mkfs failed before on a vm, which prompted me to add
314 # then it failed again on a physical machine
316 # Device /dev/disk/by-id/foo doesn't exist or access denied,
317 # so I added a wait until it existed.
318 # Then I added the mkfs.ext2, which claimed to succeed,
319 # but then couldn't be found upon reboot. In that case we didn't
320 # wait at all. So I've added a 3 second minimum wait.
323 while [[ ! -e `rootdev` ]] && (( secs
< 10 )); do
327 # Holds just a single file, rarely written, so
328 # use ext2, like was often used for the /boot partition.
329 # This exists because grub can only persist data to a non-cow fs.
330 # And we use persisting a var in grub to do a one time boot.
331 # We could pass the data on the kernel command line and persist it
332 # to grubenv after booting, but that relies on the boot always succeeding.
333 # This is just a bit more robust, and it could work for booting
334 # into ipxe which can't persist data, if we ever got that working.
335 mkfs.ext2
`grub_extdev`
336 yes YES | cryptsetup luksFormat
`rootdev` $luks_dir/host-
$HOSTNAME \
337 -c aes-cbc-essiv
:sha256
-s 256 ||
[[ $?
== 141 ]]
339 cryptsetup luksAddKey
--key-file $luks_dir/host-
$HOSTNAME \
340 `rootdev` ||
[[ $?
== 141 ]]
341 # background: Keyfile and password are treated just
342 # like 2 ways to input a passphrase, so we don't actually need to have
343 # different contents of keyfile and passphrase, but it makes some
344 # security sense to a really big randomly generated passphrase
345 # as much as possible, so we have both.
347 # This would remove the keyfile.
348 # yes 'test' | cryptsetup luksRemoveKey /dev/... \
349 # /key/file || [[ $? == 141 ]]
351 cryptsetup luksOpen
`rootdev` `root-cryptname` \
352 --key-file $luks_dir/host-
$HOSTNAME
354 ls -la /dev
/btrfs-control
# this was probably for debugging...
356 bpart $
(for dev
in ${devs[@]}; do root-cryptdev
; done)
357 bpart
${boot_devs[@]}
359 for dev
in ${devs[@]}; do
360 mkfs.ext2
`grub_extdev`
361 cryptsetup luksOpen
`rootdev` `root-cryptname` \
362 --key-file $luks_dir/host-
$HOSTNAME
368 if [[ $DISTRO != debianstable_bootstrap
]]; then
369 # bootstrap distro doesn't use separate encrypted root.
370 mount
-o subvolid
=0 $first_root_crypt /mnt
371 # systemd creates subvolumes we want to delete.
372 s
=($
(btrfs subvolume list
--sort=-path /mnt |
373 sed -rn "s#^.*path\s*(root_$DISTRO/\S+)\s*\$#\1#p"))
374 for subvol
in ${s[@]}; do btrfs subvolume delete
/mnt
/$subvol; done
375 btrfs subvolume set-default
0 /mnt
376 [[ ! -e /mnt
/root_
$DISTRO ]] || btrfs subvolume delete
/mnt
/root_
$DISTRO
381 btrfs subvolume create root_
$DISTRO
383 mkdir
-p /mnt
/root_
$DISTRO/boot
384 # could set default subvol like this, but no reason to.
385 # btrfs subvolume set-default \
386 # $(btrfs subvolume list . | grep "root_$DISTRO$" | awk '{print $2}') .
388 # no cow on the root filesystem. it's setup is fully scripted,
389 # if it's messed up, we will just recreated it,
390 # and we can get better perf with this.
391 # I can't remember exactly why, but this is preferable to mounting with
392 # -o nodatacow, I think because subvolumes inherit that.
393 chattr -Rf +C root_
$DISTRO
398 mount
-o subvolid
=0 $first_boot_dev /mnt
400 btrfs subvolume set-default
0 /mnt
# already default, just ensuring it.
402 # for libreboot systems. grub2 only reads from subvolid=0
404 cp $FAI/distro-install-common
/libreboot_grub.cfg
/mnt
/grub2
406 if [[ $DISTRO == debianstable_bootstrap
]]; then
407 # this is just convenience for the libreboot_grub config
408 # so we can glob the other ones easier.
411 boot_vol
=boot_
$DISTRO
413 [[ ! -e /mnt
/$boot_vol ]] || btrfs subvolume delete
/mnt
/$boot_vol
414 btrfs subvolume create
$boot_vol
417 ## end create subvols ##
420 mount
$first_grub_extdev /mnt
421 grub-editenv
/mnt
/grubenv
set did_fai_check
=true
422 grub-editenv
/mnt
/grubenv
set last_boot
=/$boot_vol
425 if [[ $DISTRO == debianstable_bootstrap
]]; then
426 cat > /tmp
/fai
/fstab
<<EOF
427 $first_boot_dev / btrfs noatime,subvol=$boot_vol 0 0
429 cat >/tmp
/fai
/disk_var.sh
<<EOF
430 BOOT_DEVICE="${short_devs[@]}"
431 ROOT_PARTITION=$first_boot_dev
434 # note, fai creates the mountpoints listed here
435 cat > /tmp
/fai
/fstab
<<EOF
436 $first_root_crypt / btrfs noatime,subvol=root_$DISTRO 0 0
437 $first_root_crypt /mnt/root btrfs noatime,subvolid=0 0 0
438 $first_boot_dev /boot btrfs noatime,subvol=$boot_vol 0 0
441 for dev
in ${devs[@]}; do
442 swaps
+=(`swap-cryptname`)
443 cat >>/tmp
/fai
/crypttab
<<EOF
444 `root-cryptname` `rootdev` none keyscript=/root/keyscript,discard,luks
445 `swap-cryptname` `swapdev` /dev/urandom swap,cipher=aes-xts-plain64,size=256,hash=ripemd160
447 cat >> /tmp
/fai
/fstab
<<EOF
448 `swap-cryptdev` none swap sw 0 0
453 #BOOT_DEVICE=\${BOOT_DEVICE:-"${devs[0]}"}
455 # note: swaplist seems to do nothing.
456 cat >/tmp
/fai
/disk_var.sh
<<EOF
457 BOOT_DEVICE="${short_devs[@]}"
458 BOOT_PARTITION=\${BOOT_PARTITION:-$first_boot_dev}
459 # ROOT_PARTITIONS is added by me, used in arch setup.
460 ROOT_PARTITIONS="${root_devs[@]}"
461 ROOT_PARTITION=\${ROOT_PARTITION:-$first_root_crypt}
462 SWAPLIST=\${SWAPLIST:-"${swaps[@]}"}