/lib/partman/check.d/05no_btrfs_boot is in ubiquity 18.04.14.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | #!/bin/sh
# most bootloaders that read the filesysm do support /boot on
# btrfs. Some are known not to work, e.g. zipl on s390x. Detect and
# warn.
. /lib/partman/lib/base.sh
ARCH="$(archdetect)"
case $ARCH in
s390x/*)
;;
*)
exit 0
;;
esac
get_btrfs_root_boot () {
(for i in /lib/partman/fstab.d/*; do
[ -x "$i" ] || continue
$i
done) |
while read fs mp type options dump pass; do
if [ "$mp" = / ]; then
echo root_type=$type
elif [ "$mp" = /boot ]; then
echo boot_type=$type
fi
done
}
eval "$(get_btrfs_root_boot)"
if [ "$boot_type" = btrfs ]; then
db_input critical partman-btrfs/btrfs_boot || true
db_go || exit 1
exit 1
fi
if [ "$boot_type" = "" ] && [ "$root_type" = btrfs ]; then
db_input critical partman-btrfs/btrfs_root || true
db_go || exit 1
exit 1
fi
|