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setup-disk.in
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#!/bin/sh
PREFIX=@PREFIX@
: ${LIBDIR=$PREFIX/lib}
. "$LIBDIR/libalpine.sh"
. "$LIBDIR/dasd-functions.sh"
MBR=${MBR:-"/usr/share/syslinux/mbr.bin"}
ROOTFS=${ROOTFS:-ext4}
BOOTFS=${BOOTFS:-ext4}
VARFS=${VARFS:-ext4}
DISKLABEL=${DISKLABEL:-dos}
KERNELOPTS=${KERNELOPTS:-quiet}
# default location for mounted root
SYSROOT=${SYSROOT:-/mnt}
in_list() {
local i="$1"
shift
while [ $# -gt 0 ]; do
[ "$i" = "$1" ] && return 0
shift
done
return 1
}
all_in_list() {
local needle="$1"
local i
[ -z "$needle" ] && return 1
shift
for i in $needle; do
in_list "$i" $@ || return 1
done
return 0
}
# wrapper to only show given device
_blkid() {
blkid | grep "^$1:"
}
# if given device have an UUID display it, otherwise return the device
uuid_or_device() {
local i=
# NO_DISK_UUID can be set to a list of space-separated devices to avoid using UUIDs
for i in $NO_DISK_UUID; do
if [ "$i" = "$1" ]; then
echo "$1" && return 0
fi
done
case "$1" in
/dev/md*) echo "$1" && return 0;;
esac
for i in $(_blkid "$1"); do
case "$i" in
UUID=*) eval $i;;
esac
done
if [ -n "$UUID" ]; then
echo "UUID=$UUID"
else
echo "$1"
fi
}
# generate an fstab from a given mountpoint. Convert to UUID if possible
enumerate_fstab() {
local mnt="$1"
local fs_spec= fs_file= fs_vfstype= fs_mntops= fs_freq= fs_passno=
[ -z "$mnt" ] && return
local escaped_mnt="$(echo $mnt | sed -e 's:/*$::' -e 's:/:\\/:g')"
awk "\$2 ~ /^$escaped_mnt(\/|\$)/ {print \$0}" "${ROOT}proc/mounts" | \
sed "s:$mnt:/:g; s: :\t:g" | sed -E 's:/+:/:g' | \
while read fs_spec fs_file fs_vfstype fs_mntops fs_freq fs_passno; do
if [ "$fs_file" = / ]; then
fs_passno=1
else
fs_passno=2
fi
printf "%s\t%s\t%s\t%s %s %s\n" \
"$(uuid_or_device $fs_spec)" "$fs_file" "$fs_vfstype" "$fs_mntops" $fs_freq $fs_passno
done
}
# given an fstab on stdin, determine if any of the mountpoints are encrypted
crypt_required() {
while read -r devname mountpoint fstype mntops freq passno; do
if [ -z "$devname" ] || [ "${devname###}" != "$devname" ]; then
continue
fi
uuid="${devname##UUID=}"
if [ "$uuid" != "$devname" ]; then
devname="$(blkid --uuid "$uuid")"
fi
local devnames="$devname"
if is_lvm "$devname"; then
local vg="$(find_volume_group "$devname")"
devnames=$(find_pvs_in_vg $vg)
fi
for dev in $devnames; do
mapname="${dev##/dev/mapper/}"
if [ "$mapname" != "$dev" ]; then
if cryptsetup status "$mapname" >&1 >/dev/null; then
return 0
fi
fi
done
done
return 1
}
# return true (0) if given device is lvm
is_lvm() {
lvs "$1" >/dev/null 2>&1
}
is_efi() {
[ -d "${ROOT}sys/firmware/efi" ] && return 0
return 1
}
is_rpi() {
grep -q "Raspberry Pi" /proc/device-tree/model 2>/dev/null
}
# $1 partition type (swap,linux,raid,lvm,prep,esp)
# return partition type id based on table type
partition_id() {
local id
if [ "$DISKLABEL" = "gpt" ]; then
case "$1" in
biosboot) id=21686148-6449-6E6F-744E-656564454649 ;;
swap) id=0657FD6D-A4AB-43C4-84E5-0933C84B4F4F ;;
linux) id=0FC63DAF-8483-4772-8E79-3D69D8477DE4 ;;
raid) id=A19D880F-05FC-4D3B-A006-743F0F84911E ;;
lvm) id=E6D6D379-F507-44C2-A23C-238F2A3DF928 ;;
prep) id=9E1A2d38-C612-4316-AA26-8B49521E5A8B ;;
esp) id=C12A7328-F81F-11D2-BA4B-00A0C93EC93B ;;
*) die "Partition id \"$1\" is not supported!" ;;
esac
elif [ "$DISKLABEL" = "dos" ]; then
case "$1" in
swap) id=82 ;;
linux) id=83 ;;
raid) id=fd ;;
lvm) id=8e ;;
prep) id=41 ;;
esp) id=EF ;;
vfat) id=0c ;;
*) die "Partition id \"$1\" is not supported!" ;;
esac
elif [ "$DISKLABEL" = "eckd" ]; then
case "$1" in
native|lvm|swap|raid|gpfs) id="$1" ;;
esac
else
die "Partition label \"$DISKLABEL\" is not supported!"
fi
echo $id
}
# find partitions based on partition type from specified disk
# type can be any type from partition_id or the literal string "boot"
find_partitions() {
local dev="$1" type="$2" search=
if is_dasd "$dev" eckd; then
case "$type" in
boot) echo "$dev"1 ;;
*) fdasd -p "$dev" | grep "Linux $(partition_id "$type")" | awk '{print $1}' | tail -n 1 ;;
esac
return 0
fi
case "$type" in
boot)
if [ -n "$USE_EFI" ]; then
search=$(partition_id esp)
elif [ "$DISKLABEL" = "gpt" ]; then
search="LegacyBIOSBootable"
else
search=bootable
fi
sfdisk -d "${ROOT}${dev#/}" | awk '/'$search'/ {print $1}'
;;
*)
search=$(partition_id "$type")
sfdisk -d "${ROOT}${dev#/}" | awk '/type='$search'/ {print $1}'
;;
esac
}
unpack_apkovl() {
local ovl="$1"
local dest="$2"
local suffix="${ovl##*.}"
local i
ovlfiles=/tmp/ovlfiles
if [ "$suffix" = "gz" ]; then
if ! tar -C "$dest" --numeric-owner -zxvf "$ovl" > $ovlfiles; then
if ! ask_yesno "Continue anyway? (y/n)"; then
return 1
fi
fi
return 0
fi
apk add --quiet openssl
if ! openssl list-cipher-commands | grep "^$suffix$" > /dev/null; then
errstr="Cipher $suffix is not supported"
return 1
fi
local count=0
# beep
printf "\007"
while [ $count -lt 3 ]; do
openssl enc -d -$suffix -in "$ovl" | tar --numeric-owner \
-C "$dest" -zxv >$ovlfiles 2>/dev/null && return 0
count=$(( $count + 1 ))
done
ovlfiles=
return 1
}
# find filesystem of given mounted dir
find_mount_fs() {
local mount_point="$1"
awk "\$2 == \"$mount_point\" {print \$3}" "${ROOT}proc/mounts" | tail -n 1
}
# find device for given mounted dir
find_mount_dev() {
local mnt="$1"
awk "\$2 == \"$mnt\" { print \$1 }" "${ROOT}proc/mounts" | tail -n 1
}
supported_boot_fs() {
local supported="ext2 ext3 ext4 btrfs xfs vfat"
if [ "$BOOTLOADER" = "grub" ]; then
local supported="$supported zfs"
fi
local fs=
if is_rpi; then
supported=vfat
fi
for fs in $supported; do
[ "$fs" = "$1" ] && return 0
done
echo "$1 is not supported. Only supported are: $supported" >&2
return 1
}
supported_part_label() {
case "$1" in
dos|gpt|eckd) return 0 ;;
*) die "Partition label \"$DISKLABEL\" is not supported!" ;;
esac
}
find_volume_group() {
local lv="${1##*/}"
lvs --noheadings "$1" | awk '{print $2}'
}
find_pvs_in_vg() {
local vg="$1"
pvs --noheadings | awk "\$2 == \"$vg\" {print \$1}"
}
init_chroot_mounts() {
local mnt="$1" i=
for i in proc dev; do
mkdir -p "$mnt"/$i
$MOCK mount --bind /$i "$mnt"/$i
done
}
cleanup_chroot_mounts() {
local mnt="$1" i=
for i in proc dev; do
umount "$mnt"/$i
done
}
get_bootopt() {
local opt="$1"
set -- $(cat /proc/cmdline)
for i; do
case "$i" in
"$opt"|"$opt"=*) echo "${i#*=}"; break;;
esac
done
}
find_efi_directory() {
local mnt="$1" dir=
for dir in efi boot/efi boot; do
case "$(find_mount_fs "$mnt"/$dir)" in
vfat|fat|msdos)
echo "$mnt"/$dir
return
;;
esac
done
return 1
}
# setup GRUB bootloader
setup_grub() {
local mnt="$1" root="$2" modules="$3" kernel_opts="$4" bootdev="$5"
local disk=
shift 5
# install GRUB efi mode
if [ -n "$USE_EFI" ]; then
local target fwa
local efi_directory=$(find_efi_directory "$mnt") || \
echo "WARNING: EFI directory was not found" >&2
case "$ARCH" in
x86_64) target=x86_64-efi ; fwa=x64 ;;
x86) target=i386-efi ; fwa=ia32 ;;
arm*) target=arm-efi ; fwa=arm ;;
aarch64) target=arm64-efi ; fwa=aa64 ;;
riscv64) target=riscv64-efi ; fwa=riscv64 ;;
loongarch64) target=loongarch64-efi ; fwa=loongarch64 ;;
esac
# currently disabling nvram so grub doesnt call efibootmgr
# installing to alpine directory so other distros dont overwrite it
$MOCK grub-install --target=$target --efi-directory="$efi_directory" \
--bootloader-id=alpine --boot-directory="$mnt"/boot --no-nvram
# fallback mode will use boot/boot${fw arch}.efi
$MOCK install -D "$efi_directory"/EFI/alpine/grub$fwa.efi \
"$efi_directory"/EFI/boot/boot$fwa.efi
# install GRUB for ppc64le
elif [ "$ARCH" = "ppc64le" ]; then
for disk in "$@"; do
prep=$(find_partitions "$disk" "prep")
echo "Installing grub on $prep"
grub-install --boot-directory="$mnt"/boot $prep
done
# install GRUB in bios mode
else
case "$ARCH" in
x86|x86_64)
for disk in "$@"; do
echo "Installing grub on $disk"
grub-install --boot-directory="$mnt"/boot \
--target=i386-pc "$disk"
done
;;
*) die "Cannot install GRUB in BIOS mode for $ARCH" ;;
esac
fi
# setup GRUB config. trigger will generate final grub.cfg
install -d "$mnt"/etc/default/
cat > "$mnt"/etc/default/grub <<- EOF
GRUB_TIMEOUT=2
GRUB_DISABLE_SUBMENU=y
GRUB_DISABLE_RECOVERY=true
GRUB_CMDLINE_LINUX_DEFAULT="modules=$modules $kernel_opts"
EOF
# Use Xen hypervisor as default, which is second in grub menu
if [ "$(openrc --sys)" = "XEN0" ]; then
echo "GRUB_DEFAULT=1" >> "$mnt"/etc/default/grub
fi
case "$initfs_features" in
*zfs*) echo "GRUB_FS=zfs" >> "$mnt"/etc/default/grub;;
esac
}
# setup syslinux bootloader
setup_syslinux() {
local mnt="$1" root="$2" modules="$3" kernel_opts="$4" bootdev="$5"
local exlinux_raidopt=
sed -e "s:^root=.*:root=$root:" \
-e "s:^default_kernel_opts=.*:default_kernel_opts=\"$kernel_opts\":" \
-e "s:^modules=.*:modules=$modules:" \
/etc/update-extlinux.conf > "$mnt"/etc/update-extlinux.conf
# Check if we boot from raid so we can pass proper option to
# extlinux later.
if [ -e "${ROOT}sys/block/${bootdev#/dev/}/md" ]; then
extlinux_raidopt="--raid"
fi
extlinux $extlinux_raidopt --install "$mnt"/boot
}
# setup u-boot bootloader
setup_uboot() {
local mnt="$1" root="$2" modules="$3" kernel_opts="$4"
local parameters="root=$root modules=$modules $kernel_opts"
mkdir -p "$mnt"/boot/extlinux
cat > "$mnt/boot/extlinux/extlinux.conf" <<- EOF
menu title Alpine Linux
timeout 50
default $KERNEL_FLAVOR
label $KERNEL_FLAVOR
menu label Linux $KERNEL_FLAVOR
kernel /vmlinuz-$KERNEL_FLAVOR
initrd /initramfs-$KERNEL_FLAVOR
fdtdir /dtbs-$KERNEL_FLAVOR
append $parameters
EOF
# Rely on update-u-boot to automatically determine the
# board, imagedir, etc. this may not work in all cases.
$MOCK update-u-boot
}
# setup rpi bootloader
setup_raspberrypi_bootloader() {
local mnt="$1" root="$2" modules="$3" kernel_opts="$4"
mkdir -p "$mnt"/boot
echo "root=$root modules=$modules $kernel_opts" > "$mnt"/boot/cmdline.txt
}
# detect which firmware packages to install, if any
select_firmware_pkgs() {
local firmware_pkgs="$( (cd "${ROOT}sys/module/" 2>/dev/null && echo *) \
| xargs modinfo -F firmware 2>/dev/null \
| awk -F/ '{print $1 == $0 ? "linux-firmware-other" : "linux-firmware-"$1}' \
| sort -u)"
# filter out non-existing packages like linux-firmware-b43
# https://gitlab.alpinelinux.org/alpine/alpine-conf/-/issues/10530
apk search --quiet --exact ${firmware_pkgs:-linux-firmware-none}
}
is_nvme_dev() {
local i
for i; do
case ${i##*/} in
nvme*) return 0;;
esac
done
return 1
}
install_mounted_root() {
local mnt="$(realpath "$1")"
shift 1
local disks="${@}" mnt_boot= boot_fs= root_fs= use_crypt=
local initfs_features="ata base ide scsi usb virtio"
local pvs= dev= rootdev= cryptdev= bootdev= extlinux_raidopt= root= modules=
local kernel_opts="$KERNELOPTS"
[ "$ARCH" = "s390x" ] && initfs_features="$initfs_features qeth dasd_mod"
[ "$ARCH" = "aarch64" ] && initfs_features="$initfs_features phy"
is_rpi && initfs_features="base mmc usb"
rootdev=$(find_mount_dev "$mnt")
if [ -z "$rootdev" ]; then
echo "'$mnt' does not seem to be a mount point" >&2
return 1
fi
root_fs=$(find_mount_fs "$mnt")
initfs_features="$initfs_features $root_fs"
if [ "$root_fs" = "zfs" ]; then
initfs_features="$initfs_features keymap"
fi
if is_lvm "$rootdev"; then
initfs_features="$initfs_features lvm"
local vg="$(find_volume_group "$rootdev")"
pvs=$(find_pvs_in_vg $vg)
cryptdev=$(cryptsetup status $pvs 2>&1 | awk '/device:/ { print $2 }')
else
cryptdev=$(cryptsetup status "$rootdev" 2>&1 | awk '/device:/ { print $2 }')
fi
bootdev=$(find_mount_dev "$mnt"/boot)
if [ -z "$bootdev" ]; then
bootdev=$rootdev
mnt_boot="$mnt"
else
mnt_boot="$mnt"/boot
fi
boot_fs=$(find_mount_fs "$mnt_boot")
if [ "$BOOTLOADER" != none ] && ! supported_boot_fs "$boot_fs"; then
[ -z "$FORCE_BOOTFS" ] && return 1
echo "Continuing at your own risk."
fi
# if root fileystem is zfs, check if we need to load
# nvme feature when creating initramfs
if [ "$root_fs" = "zfs" ]; then
for dev in $(zpool list -v ${rootdev%%/*} | sed '/^\S.*/d;s/^\s*\(\S*\)\s.*/\1/g'); do
case $dev in
nvme*)
initfs_features="${initfs_features% nvme} nvme"
;;
esac
done
fi
# check if our root is on raid so we can feed mkinitfs and
# bootloader conf with the proper kernel module params
for dev in $rootdev $pvs $cryptdev; do
# check if we need hardware raid drivers
case $dev in
/dev/cciss/*)
initfs_features="${initfs_features% raid} raid"
;;
/dev/nvme*)
initfs_features="${initfs_features% nvme} nvme"
;;
/dev/mmc*)
initfs_features="${initfs_features% mmc} mmc"
;;
esac
local md="${dev#/dev/}"
[ -e "${ROOT}sys/block/$md/md" ] || continue
if is_nvme_dev "${ROOT}sys/block/$md/slaves"/*; then
initfs_features="${initfs_features% nvme} nvme"
fi
initfs_features="${initfs_features% raid} raid"
local level="$(cat "${ROOT}sys/block/$md/md/level")"
case "$level" in
raid1) raidmod="${raidmod%,raid1},raid1";;
raid[456]) raidmod="${raidmod%,raid456},raid456";;
esac
done
if [ -n "$VERBOSE" ]; then
echo "Root device: $rootdev"
echo "Root filesystem: $root_fs"
echo "Boot device: $bootdev"
echo "Boot filesystem: $boot_fs"
fi
if [ -z "$APKOVL" ]; then
ovlfiles=/tmp/ovlfiles
lbu package - | tar -C "$mnt" -zxv > "$ovlfiles"
# comment out local repositories
if [ -f "$mnt"/etc/apk/repositories ]; then
sed -i -e 's:^/:#/:' "$mnt"/etc/apk/repositories
fi
else
echo "Restoring backup from $APKOVL to $rootdev..."
unpack_apkovl "$APKOVL" "$mnt" || return 1
fi
# we should not try start modloop on sys install
rm -f "$mnt"/etc/runlevels/*/modloop
# generate the fstab
if [ -f "$mnt"/etc/fstab ]; then
mv "$mnt"/etc/fstab "$mnt"/etc/fstab.old
fi
mkdir -p "$mnt"/etc
enumerate_fstab "$mnt" >> "$mnt"/etc/fstab
if [ -n "$SWAP_DEVICES" ]; then
local swap_dev
for swap_dev in $SWAP_DEVICES; do
printf "%s\tnone\tswap\tdefaults\t0 0\n" \
"$(uuid_or_device $swap_dev)" \
>> "$mnt"/etc/fstab
done
fi
cat >>"$mnt"/etc/fstab <<-__EOF__
/dev/cdrom /media/cdrom iso9660 noauto,ro 0 0
/dev/usbdisk /media/usb vfat noauto 0 0
tmpfs /tmp tmpfs nosuid,nodev 0 0
__EOF__
if crypt_required <"$mnt"/etc/fstab; then
use_crypt=1
initfs_features="$initfs_features cryptsetup keymap"
if is_nvme_dev "${ROOT}sys/block"/dm-*/slaves/*; then
initfs_features="$initfs_features nvme"
fi
fi
# generate mkinitfs.conf
mkdir -p "$mnt"/etc/mkinitfs/features.d
echo "features=\"$initfs_features\"" > "$mnt"/etc/mkinitfs/mkinitfs.conf
if [ -n "$raidmod" ]; then
echo "/sbin/mdadm" > "$mnt"/etc/mkinitfs/features.d/raid.files
echo "/etc/mdadm.conf" >> "$mnt"/etc/mkinitfs/features.d/raid.files
fi
# generate update-extlinux.conf
root=$(uuid_or_device $rootdev)
kernel_opts="$kernel_opts rootfstype=$root_fs"
if [ -n "$(get_bootopt nomodeset)" ]; then
kernel_opts="nomodeset $kernel_opts"
fi
if [ "$use_crypt" ]; then
# Boot to encrypted root
if [ $(echo "$pvs" | wc -w) -gt 1 ]; then
echo "Root logical volume spans more than one physical volume."
echo "This is currently unsupported."
echo "Proceed manually or retry with root on a single physical volume."
exit 1
fi
local cryptroot="${pvs:-"$rootdev"}"
if cryptsetup status "$cryptroot" 2>&1 >/dev/null; then
cryptroot=$(cryptsetup status "$cryptroot" | awk '/device:/ { print $2 }')
cryptroot=$(uuid_or_device $cryptroot)
kernel_opts="cryptroot=$cryptroot cryptdm=root $kernel_opts"
root=$([ -n "$pvs" ] && echo "$rootdev" || echo "/dev/mapper/root")
fi
fi
modules="sd-mod,usb-storage,${root_fs}${raidmod}"
case "$initfs_features" in
*nvme*) modules="$modules,nvme"
if [ -e /sys/module/vmd ]; then
modules="$modules,vmd"
fi
;;
esac
# remove the installed db in case its there so we force re-install
rm -f "$mnt"/var/lib/apk/installed "$mnt"/lib/apk/db/installed
echo "Installing system on $rootdev:"
case "$BOOTLOADER" in
none) ;;
grub) setup_grub "$mnt" "$root" "$modules" "$kernel_opts" "$bootdev" $disks ;;
syslinux) setup_syslinux "$mnt" "$root" "$modules" "$kernel_opts" "$bootdev" ;;
zipl) setup_zipl "$mnt" "$root" "$modules" "$kernel_opts" ;;
raspberrypi-bootloader) setup_raspberrypi_bootloader "$mnt" "$root" "$modules" "$kernel_opts" ;;
u-boot) setup_uboot "$mnt" "$root" "$modules" "$kernel_opts" ;;
*) die "Bootloader \"$BOOTLOADER\" not supported!" ;;
esac
# apk reads config from target root so we need to copy the config
mkdir -p "$mnt"/etc/apk/keys/
cp /etc/apk/keys/* "$mnt"/etc/apk/keys/
local apkflags="--initdb --quiet --progress --update-cache --clean-protected"
local pkgs="$(grep -h -v -w sfdisk "$mnt"/etc/apk/world \
"$mnt"/var/lib/apk/world 2>/dev/null)"
pkgs="$pkgs linux-$KERNEL_FLAVOR alpine-base $(select_bootloader_pkg) $(select_firmware_pkgs)"
if [ "$(openrc --sys)" = "XEN0" ]; then
pkgs="$pkgs xen-hypervisor"
fi
if is_rpi; then
pkgs="$pkgs dosfstools"
fi
local repos="$(sed -e 's/\#.*//' "${ROOT}etc/apk/repositories" 2>/dev/null)"
local repoflags=
for i in $repos; do
repoflags="$repoflags --repository $i"
done
init_chroot_mounts "$mnt"
apk add --root "$mnt" $apkflags --overlay-from-stdin \
$repoflags $pkgs <$ovlfiles
local ret=$?
cleanup_chroot_mounts "$mnt"
return $ret
}
unmount_partitions() {
local mnt="$1"
# unmount the partitions
umount $(awk '{print $2}' "${ROOT}proc/mounts" | grep -E "^$mnt(/|\$)" | sort -r)
if [ -n "$USE_CRYPT" ]; then
if [ -n "$USE_LVM" ]; then
vgchange -a n
fi
cryptsetup close /dev/mapper/root
fi
}
# figure out decent default swap size in mega bytes
find_swap_size() {
local memtotal_kb="$(awk '$1 == "MemTotal:" {print $2}' /proc/meminfo)"
# use 2 * avaiable ram or no more than 1/3 of smallest disk space
local size="$(( $memtotal_kb * 2 / 1024 ))"
local disk= disksize=
for disk in $@; do
local sysfsdev="$(echo ${disk#/dev/} | sed 's:/:!:g')"
local sysfspath="${ROOT}sys/block/$sysfsdev/size"
# disksize = x * 512 / (1024 * 1024) = x / 2048
# maxsize = $disksize / 4 = x / (2048 * 4) = x / 8192
maxsize=$(awk '{ printf "%i", $0 / 8192 }' $sysfspath )
if [ $size -gt $maxsize ]; then
size=$maxsize
fi
done
if [ $size -gt 4096 ]; then
# dont ever use more than 4G
size=4096
elif [ $size -lt 64 ]; then
# dont bother create swap smaller than 64MB
size=0
fi
echo $size
}
# figure out decent default EFI partition size in mega bytes
find_efi_size() {
local blocksize=$(cat $(echo "$@" | sed -E "s:/?dev/([^ ]+):${ROOT}sys/block/\1/queue/logical_block_size:g") \
| sort -n | tail -n 1 || echo 512)
local disksize_blk=$(cat $(echo "$@" | sed -E "s:/?dev/([^ ]+):${ROOT}sys/block/\1/size:g") \
| sort -n | tail -n 1 || echo 0)
local disksize_mb=$(( blocksize * disksize_blk / 1024 / 1024 ))
# calculate minimal FAT32 size
# for block size 512 minimal size is 32MB
# for block size 4096, minimal size is 260M
local min_size=$(( blocksize * 64 / 1000 + 2 ))
local size=160
if [ $disksize_mb -gt 8192 ]; then
size=512
elif [ $disksize_mb -gt 2048 ]; then
size=264
fi
echo $(( size > min_size ? size : min_size ))
}
has_mounted_part() {
local p
local sysfsdev="$(echo ${1#/dev/} | sed 's:/:!:g')"
# parse /proc/mounts for mounted devices
for p in $(awk '$1 ~ /^\/dev\// {gsub("/dev/", "", $1); gsub("/", "!", $1); print $1}' \
"${ROOT}proc/mounts" 2>/dev/null); do
[ "$p" = "$sysfsdev" ] && return 0
[ -e "${ROOT}sys/block/$sysfsdev/$p" ] && return 0
done
return 1
}
has_holders() {
local i
# check if device is used by any md devices
for i in $1/holders/* $1/*/holders/*; do
[ -e "$i" ] && return 0
done
return 1
}
is_available_disk() {
local dev="$1"
# check so it does not have mounted partitions
has_mounted_part $dev && return 1
# check so its not part of an md setup
if has_holders "${ROOT}sys/block/$dev"; then
[ -n "$USE_RAID" ] && echo "Warning: $dev is part of a running raid" >&2
return 1
fi
return 0
}
find_disks() {
local p=
for p in "${ROOT}sys/block"/*/device; do
local dev="${p%/device}"
dev=${dev#*/sys/block/}
if is_available_disk "$dev"; then
printf %s " $dev"
fi
done
}
stop_all_raid() {
local rd
for rd in /dev/md*; do
[ -b $rd ] && mdadm --stop $rd
done
}
select_bootloader_pkg() {
if [ "$BOOTLOADER" = none ]; then
return
fi
local bootloader="$BOOTLOADER"
if [ "$ARCH" = "ppc64le" ]; then
bootloader=grub-ieee1275
elif [ "$ARCH" = "s390x" ]; then
bootloader=s390-tools
elif [ -n "$USE_EFI" ]; then
bootloader=grub-efi
elif [ "$BOOTLOADER" = "grub" ]; then
bootloader=grub-bios
fi
echo "$bootloader"
}
# install needed programs
init_progs() {
local raidpkg= lvmpkg= cryptpkg= fs= fstools= grub=
[ -n "$USE_RAID" ] && raidpkg="mdadm"
[ -n "$USE_LVM" ] && lvmpkg="lvm2"
[ -n "$USE_CRYPT" ] && cryptpkg="cryptsetup blkid"
for fs in $BOOTFS $ROOTFS $VARFS; do
# we need load btrfs module early to avoid the error message:
# 'failed to open /dev/btrfs-control'
if ! grep -q -w "$fs" /proc/filesystems; then
modprobe $fs
fi
case $fs in
xfs) fstools="$fstools xfsprogs";;
ext*) fstools="$fstools e2fsprogs";;
btrfs) fstools="$fstools btrfs-progs";;
vfat) fstools="$fstools dosfstools";;
esac
done
apk add --quiet sfdisk $cryptpkg $lvmpkg $raidpkg $fstools $@
}
show_disk_info() {
local disk= vendor= model= d= size= busid=
for disk in $@; do
local dev="${disk#/dev/}"
d=$(echo $dev | sed 's:/:!:g')
vendor=$(cat "${ROOT}sys/block/$d/device/vendor" 2>/dev/null)
model=$(cat "${ROOT}sys/block/$d/device/model" 2>/dev/null)
busid=$(readlink -f "${ROOT}sys/block/$d/device" 2>/dev/null)
size=$(awk '{gb = ($1 * 512)/1000000000; printf "%.1f GB\n", gb}' "${ROOT}sys/block/$d/size" 2>/dev/null)
if is_dasd $dev eckd; then
echo " $dev ($size $vendor ${busid##*/})"
else
echo " $dev ($size $vendor $model)"
fi
done
}
confirm_erase() {
local erasedisks="$@"
if [ "$ERASE_DISKS" = "$erasedisks" ]; then
return 0
fi
printf "\n"
echo "WARNING: The following disk(s) will be erased:"
show_disk_info $@
printf "\n"
ask_yesno "WARNING: Erase the above disk(s) and continue? (y/n)" n
}
# setup partitions on given disk dev in $1.
# usage: setup_partitions <diskdev> size1,type1 [size2,type2 ...]
setup_partitions() {
local diskdev="${ROOT}${1#/}" line=
shift
supported_part_label "$DISKLABEL" || return 1
# create clean disk label
echo "label: $DISKLABEL" | sfdisk --quiet "$diskdev"
# initialize MBR for syslinux only
if [ "$BOOTLOADER" = "syslinux" ] && [ -f "$MBR" ]; then
cat "$MBR" > "$diskdev"
fi
# create new partitions
(
for line in "$@"; do
case "$line" in
0M*) ;;
*=*) echo "$line";;
*) echo ",$line" ;;
esac
done
) | sfdisk --quiet --wipe-partitions always --label "$DISKLABEL" "$diskdev" || return 1
}
# set up optional raid and create filesystem on boot device.
setup_boot_dev() {
local disks="$@" disk= bootdev= mkfs_args=
[ "$BOOTFS" != "vfat" ] && mkfs_args="-q"
local part="$(for disk in $disks; do find_partitions "$disk" "boot"; done)"
set -- $part
bootdev=$1
[ -z "$bootdev" ] && return 1
if [ "$ARCH" = "ppc64le" ]; then
# Change bootable partition to PReP partition
for disk in $disks; do
echo ',,,*' | sfdisk --quiet $disk -N1
echo ',,,-' | sfdisk --quiet $disk -N2
done
$MOCK mdev -s
fi
echo "Creating file systems..."
if [ -n "$USE_RAID" ]; then
local missing=
local num=$#
if [ $# -eq 1 ]; then
missing="missing"
num=2
fi
# we only use raid level 1 for boot devices
mdadm --create /dev/md0 --level=1 --raid-devices=$num \
--metadata=0.90 --quiet --run $@ $missing || return 1
bootdev=/dev/md0
fi
case "$BOOTFS" in
vfat) mkfs_args="-F 32";; # UEFI firmware often only support FAT32
btrfs) mkfs_args="";;
ext4) mkfs_args="$mkfs_args -O ^64bit";; # pv-grub does not support 64bit
esac
$MOCK mkfs.$BOOTFS $MKFS_OPTS_BOOT $mkfs_args $bootdev
BOOT_DEV="$bootdev"
}
# $1 = index
# $2 = partition type
# $3... = disk devices
find_nth_non_boot_parts() {
local idx="$1" id="$2" disk= type=bootable
shift 2
local disks="$@"
local search="bootable"
if [ -n "$USE_EFI" ]; then
search="$(partition_id esp)"
elif [ "$DISKLABEL" = "gpt" ]; then
search="LegacyBIOSBootable"
fi
for disk in $disks; do
if is_dasd $disk eckd; then
fdasd -p $disk | grep "Linux $id" | awk '{print $1}' | tail -n 1
else
sfdisk -d "${ROOT}${disk#/}" | grep -v "$search" \
| awk "/(Id|type)=$id/ { i++; if (i==$idx) print \$1 }"
fi
done
}
setup_non_boot_raid_dev() {
local md_dev="$1"
local idx="${md_dev#/dev/md}"
[ -z "$md_dev" ] && return 0
if [ "$ARCH" = "ppc64le" ]; then
# increment idx as PReP partition is
# the bootable partition in ppc64le
idx=$((idx+1))
fi
shift
local level=1
local missing=
local pid="$(partition_id raid)"
local raid_parts="$(find_nth_non_boot_parts $idx $pid $@)"
set -- $raid_parts
# how many disks do we have?
case $# in
0) echo "No Raid partitions found" >&2; return 1;;
1) level=1; missing="missing"; num=2;;
2) level=1; missing= ; num=2;;
*) level=5; missing= ; num=$#;;
esac
mdadm --create $md_dev --level=$level --raid-devices=$num \
--quiet --run $@ $missing || return 1
}
# setup device for lvm, create raid array if needed
setup_lvm_volume_group() {
local vgname="$1"
shift
local lvmdev=
if [ -n "$USE_RAID" ]; then
setup_non_boot_raid_dev /dev/md1 $@ || return 1
lvmdev=/dev/md1
else
lvmdev=$(find_partitions "$1" "lvm")
fi
if [ -n "$USE_CRYPT" ] && [ "$DISK_MODE" = "data" ]; then
printf "target=var\nsource='%s'\n" "$lvmdev" > /etc/conf.d/dmcrypt
lvmdev=$(setup_crypt $lvmdev var) || return 1
rc-update add dmcrypt boot
fi
if [ -n "$USE_CRYPT" ] && [ "$DISK_MODE" = "sys" ]; then
lvmdev=$(setup_crypt $lvmdev root) || return 1
fi
# be quiet on success
local errmsg="$(dd if=/dev/zero of=$lvmdev bs=1k count=1 2>&1)" \
|| echo "$errmsg"
pvcreate --quiet $lvmdev \
&& vgcreate --quiet $vgname $lvmdev >/dev/null
}
# set up swap on given device(s)
setup_swap_dev() {
local swap_dev=
sed -i -e '/swap/d' "${ROOT}etc/fstab"
SWAP_DEVICES=