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CISS.debian.installer/func/partitioning/3200_partitioning.sh
Marc S. Weidner 219c272299
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V8.00.000.2025.06.17 
Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
2025-07-29 19:46:22 +02:00

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#!/bin/bash
# SPDX-Version: 3.0
# SPDX-CreationInfo: 2025-06-17; WEIDNER, Marc S.; <msw@coresecret.dev>
# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.git
# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
# SPDX-FileType: SOURCE
# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
# SPDX-PackageName: CISS.debian.installer
# SPDX-Security-Contact: security@coresecret.eu
guard_sourcing
#######################################
# EFI System Partition | EF00 | UEFI Bootloader (ESP, FAT32)
# BIOS Boot Partition | EF02 | BIOS Bootloader area (GRUB)
# Linux SWAP | 8200 | Linux Swap
# Linux ext4/btrfs | 8300 | Linux Filesystem (root, home)
#######################################
#######################################
# Function that generates each partition on each device according to the chosen recipe string and collects information about:
# - the mount path and whether to mount or not and in which order mounting must be done.
# - LUKS encryption enabled.
# - Specific device partition data for each mount path.
# Globals:
# ARY_FSTAB_MOUNT_PATHS
# DIR_LOG
# HMP_FSTAB_MOUNT_FTYPE
# HMP_PATH_PARTUUID
# VAR_RECIPE_FIRMWARE
# VAR_RECIPE_STRING
# VAR_RECIPE_TABLE
# VAR_SETUP_PART
# Arguments:
# None
# Returns:
# ERR_PARTITIONTBL
# ERR_PART_CREATE
# ERR_PART_READ
# ERR_TABLE_CREATE
# ERR_TABLE_DELETE
# 0: on success
#######################################
partitioning() {
### Declare Arrays, HashMaps, and Variables.
# shellcheck disable=SC2034
declare -Ag HMP_PATH_PARTUUID # Used in: 3290() - [Mount Path:Partition UUID].
# shellcheck disable=SC2034
declare -Ag HMP_FSTAB_MOUNT_FTYPE # Used in: 4040() - [Mount Path:Filesystem type].
# shellcheck disable=SC2034
declare -Ag HMP_PATH_DEV_PART # Used in: 3220() - [Mount Path:DEV.PARTITION].
# Used in: 3240() - [Mount Path:DEV.PARTITION].
# Used in: 3280() - [Mount Path:DEV.PARTITION].
# shellcheck disable=SC2034
declare -ag ARY_CRYPT_MOUNT_PATHS=() # Used in: 3220() - Only entries [/paths] for encryption.
# shellcheck disable=SC2034
declare -ag ARY_FORMT_MOUNT_PATHS=() # Used in: 3240() - Only entries [/paths] for filesystem generation.
# shellcheck disable=SC2034
declare -ag ARY_FSTAB_MOUNT_PATHS=() # Used in: 4040() - Only entries [/paths] for '/etc/fstab' generation.
# shellcheck disable=SC2034
declare -ag ARY_PATHS_SORTED=() # Used in: 3280() - All entries [/paths] in a mount ordering scheme.
# Used in: 4040() - All entries [/paths] in a mount ordering scheme.
declare var_dev="" var_part="" \
var_begin="" var_boot="" var_encryption="" var_end="" var_end_arg="" var_end_mib="" var_format="" var_fs="" \
var_label="" var_mount_path="" var_mount_true="" var_pri="" var_uuid=""
declare -a ary_devs=() ary_parts=() ary_paths_unsorted=()
declare -i i=0 var_dev_size=0 var_dev_end=0
### Iterate over all devices in the recipe.
# shellcheck disable=SC2312
readarray -t ary_devs < <(yq e -r ".recipe.${VAR_RECIPE_STRING}.dev | keys | .[]" "${VAR_SETUP_PART}")
for var_dev in "${ary_devs[@]}"; do
### All current data for the respective device will be deleted.
if ! blkdiscard -f "/dev/${var_dev}"; then
do_log "warn" "file_only" "3200() Partition table: '/dev/${var_dev}' deletion failed with: 'blkdiscard -f' trying 'sgdisk' fallback."
if command -v sgdisk >/dev/null && sgdisk --zap-all "/dev/${var_dev}"; then
do_log "debug" "file_only" "3200() [command -v sgdisk >/dev/null && sgdisk --zap-all]."
do_log "info" "file_only" "3200() Partition table: '/dev/${var_dev}' wiped with 'sgdisk --zap-all'."
elif dd if=/dev/zero of="/dev/${var_dev}" bs=1M count=8 status=none; then
do_log "debug" "file_only" "3200() [dd if=/dev/zero of=/dev/${var_dev} bs=1M count=8 status=none]."
do_log "info" "file_only" "3200() Partition table: '/dev/${var_dev}' overwritten with zeros."
else
do_log "fatal" "file_only" "3200() Partition table: '/dev/${var_dev}' deletion failed with: [blkdiscard, sgdisk and dd]."
return "${ERR_TABLE_DELETE}"
fi
else
do_log "info" "file_only" "3200() Partition table: '/dev/${var_dev}' discarded [blkdiscard -f /dev/${var_dev}]."
fi
case "${VAR_RECIPE_TABLE,,}" in
gpt|mbr)
if ! parted -s "/dev/${var_dev}" mklabel "${VAR_RECIPE_TABLE,,}"; then
do_log "fatal" "file_only" "3200() [parted -s /dev/${var_dev} mklabel ${VAR_RECIPE_TABLE,,}] failed."
do_log "fatal" "file_only" "3200() Partition table: '/dev/${var_dev}' creation failed."
return "${ERR_TABLE_CREATE}"
fi
do_log "info" "file_only" "3200() Partition table: '/dev/${var_dev}' generated: '${VAR_RECIPE_TABLE}'."
;;
*)
do_log "fatal" "file_only" "3200() No valid partition table chosen. String was '${VAR_RECIPE_TABLE}'."
return "${ERR_PARTITIONTBL}"
;;
esac
### Iterate over all partitions for this device.
# shellcheck disable=SC2312
readarray -t ary_parts < <(yq e -r ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev} | keys | .[]" "${VAR_SETUP_PART}")
for var_part in "${ary_parts[@]}"; do
### Extract parameters from YAML.
var_begin=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.begin" "${VAR_SETUP_PART}")
var_end=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.end" "${VAR_SETUP_PART}")
var_fs=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.filesystem.version" "${VAR_SETUP_PART}")
var_format=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.filesystem.format" "${VAR_SETUP_PART}")
var_boot=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.bootable" "${VAR_SETUP_PART}")
var_pri=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.primary" "${VAR_SETUP_PART}")
var_mount_path=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.mount.path" "${VAR_SETUP_PART}")
var_mount_true=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.mount.enable" "${VAR_SETUP_PART}")
var_encryption=$(yq_val ".recipe.${VAR_RECIPE_STRING}.dev.${var_dev}.${var_part}.encryption.enable" "${VAR_SETUP_PART}")
### Assign the start zone of the first partition and skip the first 2 MiB as best practice.
if [[ "${var_begin,,}" == "min" ]]; then
var_begin="2MiB"
fi
### Assign the landing zone of the last partition and reserve 16 MiB for GPT and mdadm binary metadata.
if [[ "${var_end,,}" == "max" ]]; then
var_dev_size=$(blockdev --getsize64 "/dev/${var_dev}")
var_dev_end=$(( var_dev_size - 16 * 1024 * 1024 ))
var_end_mib=$(( var_dev_end / 1024 / 1024 ))
var_end_arg="${var_end_mib}MiB"
else
var_end_arg="${var_end}"
fi
case "${VAR_RECIPE_TABLE,,}" in
gpt)
var_label=$(get_label "${var_mount_path}" "${var_fs}" "part")
if ! parted -s "/dev/${var_dev}" mkpart "${var_label}" "${var_fs}" "${var_begin}" "${var_end_arg}"; then
do_log "fatal" "file_only" "3200() [parted -s /dev/${var_dev} mkpart ${var_label} ${var_fs} ${var_begin} ${var_end_arg}] failed."
do_log "fatal" "file_only" "3200() Partition: '/dev/${var_dev}${var_part}' creation failed."
return "${ERR_PART_CREATE}"
fi
;;
mbr|msdos)
if ! parted -s "/dev/${var_dev}" mkpart "${var_pri}" "${var_fs}" "${var_begin}" "${var_end_arg}"; then
do_log "fatal" "file_only" "3200() [parted -s /dev/${var_dev} mkpart ${var_pri} ${var_fs} ${var_begin} ${var_end_arg}] failed."
do_log "fatal" "file_only" "3200() Partition: '/dev/${var_dev}${var_part}' creation failed."
return "${ERR_PART_CREATE}"
fi
;;
esac
do_log "info" "file_only" "3200() Partition: '/dev/${var_dev}${var_part}' generated | begin: '${var_begin}' | end: '${var_end_arg}'."
### Assign the correct GPT typecode via sgdisk if table is GPT.
if [[ "${VAR_RECIPE_TABLE,,}" == "gpt" ]]; then
declare typecode="8300" # Default: Linux FS
case "${var_fs,,}" in
fat32)
typecode="EF00" ;; ### EFI System Partition
swap)
typecode="8200" ;; ### Linux SWAP
bios)
typecode="EF02" ;; ### BIOS Boot Partition
ext4|btrfs)
typecode="8300" ;; ### Linux native FS
*)
do_log "warn" "file_only" "3200() Partition: '/dev/${var_dev}${var_part}' unknown FS type: '${var_fs}', using default GPT FS '8300'."
;;
esac
if sgdisk --typecode="${var_part}:${typecode}" "/dev/${var_dev}" &>/dev/null; then
do_log "info" "file_only" "3200() Partition: '/dev/${var_dev}${var_part}' GPT typecode '${typecode}' set for '${var_fs}'."
else
do_log "warn" "file_only" "3200() Partition: '/dev/${var_dev}${var_part}' GPT typecode '${typecode}' failed to set."
fi
fi
### Set the bootable flag if necessary.
if [[ "${var_boot,,}" == "true" ]]; then
case "${VAR_RECIPE_TABLE,,}:${VAR_RECIPE_FIRMWARE,,}" in
gpt:uefi|mbr:uefi)
do_log "info" "file_only" "3200() Partition: '/dev/${var_dev}${var_part}' | [${VAR_RECIPE_TABLE^^}:UEFI] no bootable flag required."
;;
gpt:bios|mbr:bios)
parted -s "/dev/${var_dev}" set "${var_part}" boot on
do_log "info" "file_only" "3200() Partition: '/dev/${var_dev}${var_part}' | [${VAR_RECIPE_TABLE^^}:BIOS] marked as bootable."
;;
esac
fi
### Store PARTUUID of the partition.
udevadm settle
for i in {1..10}; do
var_uuid=$(blkid -s PARTUUID -o value "/dev/${var_dev}${var_part}") && [[ -n "${var_uuid}" ]] && break
sleep 0.25
done
if [[ -z "${var_uuid}" ]]; then
do_log "fatal" "file_only" "3200() Partition: '/dev/${var_dev}${var_part}' could not read PARTUUID."
return "${ERR_PART_READ}"
else
HMP_PATH_PARTUUID["${var_mount_path}"]="${var_uuid}"
do_log "debug" "file_only" "3200() [HMP_PATH_PARTUUID]: '${var_mount_path}' -> '${HMP_PATH_PARTUUID["${var_mount_path}"]}'."
fi
### Gathering information for forthcoming modules 32n0().
# shellcheck disable=SC2034
HMP_PATH_DEV_PART["${var_mount_path}"]="${var_dev}.${var_part}"
### Gathering information for encryption module 3220().
if [[ "${var_encryption}" == "true" ]]; then
# shellcheck disable=SC2034
ARY_CRYPT_MOUNT_PATHS+=("${var_mount_path}")
fi
### Gathering information for filesystem module 3240().
if [[ "${var_format}" == "true" ]]; then
# shellcheck disable=SC2034
ARY_FORMT_MOUNT_PATHS+=("${var_mount_path}")
fi
### Gathering information for mounting module 3280().
ary_paths_unsorted+=("${var_mount_path}")
### Gathering information for '/etc/fstab'-generation in 4040().
if [[ "${var_mount_true}" == "true" ]]; then
# shellcheck disable=SC2034
ARY_FSTAB_MOUNT_PATHS+=("${var_mount_path}")
do_log "debug" "file_only" "3200() [ARY_FSTAB_MOUNT_PATHS]: '${var_mount_path}'."
HMP_FSTAB_MOUNT_FTYPE["${var_mount_path}"]="${var_fs}"
do_log "debug" "file_only" "3200() [HMP_FSTAB_MOUNT_FTYPE]: '${var_mount_path}' -> '${HMP_FSTAB_MOUNT_FTYPE["${var_mount_path}"]}'."
fi
done
lsblk -o NAME,START,SIZE,PHY-SEC,LOG-SEC,ALIGNMENT "/dev/${var_dev}" >| "${DIR_LOG}/${var_dev}_alignment.log"
sgdisk -p "/dev/${var_dev}" >| "${DIR_LOG}/${var_dev}_info.log"
done
### Prepare mount ordering scheme.
# shellcheck disable=SC2312
IFS=$'\n' read -r -d '' -a ARY_PATHS_SORTED < <(printf "%s\n" "${ary_paths_unsorted[@]}" | sort -u | awk 'BEGIN{FS="/"}{print NF, $0}' | sort -n | cut -d' ' -f2- && printf '\0')
printf "%s\n" "${ary_paths_unsorted[@]}" >| "${DIR_LOG}/mount_paths_unsorted.log"
printf "%s\n" "${ARY_PATHS_SORTED[@]}" >| "${DIR_LOG}/mount_paths_sorted.log"
return 0
}
# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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