diff options
Diffstat (limited to 'core/modules/disk-partitions/data/opt/openslx/scripts/systemd-setup_partitions')
| -rwxr-xr-x | core/modules/disk-partitions/data/opt/openslx/scripts/systemd-setup_partitions | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/core/modules/disk-partitions/data/opt/openslx/scripts/systemd-setup_partitions b/core/modules/disk-partitions/data/opt/openslx/scripts/systemd-setup_partitions new file mode 100755 index 00000000..641ae372 --- /dev/null +++ b/core/modules/disk-partitions/data/opt/openslx/scripts/systemd-setup_partitions @@ -0,0 +1,272 @@ +#!/bin/bash +# Arrays etc and $(( )) with big numbers +# ----------------------------------------------------------------------------- +# +# Copyright (c) 2018 bwLehrpool-Projektteam +# +# This program/file is free software distributed under the GPL version 2. +# See https://www.gnu.org/licenses/old-licenses/gpl-2.0-standalone.html +# +# If you have any feedback please consult https://bwlehrpool.de and +# send your feedback to bwlehrpool@hs-offenburg.de. +# +# General information about bwLehrpool can be found at https://bwlehrpool.de +# +# ----------------------------------------------------------------------------- +# +# Local hard disk autodetection script for OpenSLX linux stateless clients, +# detecting swap and special partitions + +############################################################################# + +. /opt/openslx/bin/slx-tools + +# Mount point for persistent scratch partition (type 45) +MOUNT_POINT_45="/opt/openslx/persistent" +PARTITION_FILE="/run/openslx/partitions" +readonly MOUNT_POINT_45 PARTITION_FILE +mkdir -p "/run/openslx" + +declare -a TMPFILES +gettmp () { + local vn file + for vn in "$@"; do + file=$(mktemp -p /run/openslx) # since we fiddle around with /tmp in this script + declare -g "${vn}=${file}" + TMPFILES+=("$file") + done +} +delalltmp () { + rm -f -- "${TMPFILES[@]}" +} +trap delalltmp EXIT + +# get_mount_options <fstype> <varname> +get_mount_options () { + case "$1" in + ext2) + declare -ag "${2}=(-o nocheck)" + ;; + ext4) + declare -ag "${2}=(-o 'errors=remount-ro,data=ordered,relatime,quota')" + ;; + *) + declare -ag "${2}=()" + esac +} + +# General formatter for the /tmp partition on a local harddisk +format_disk () { + declare -ag MOUNT_OPTIONS_SET_BY_FORMAT_DISK=() # Global var! + local target="$1" + local fslist="xfs jfs ext3 ext2 ext4" + local fs + declare -a fopt + [ $# -ge 2 ] && fslist="$2" + for fs in $fslist ; do + if grep -q "\\b${fs}\\b" "/proc/filesystems"; then + # Filesystem already supported by running kernel + : + elif modprobe "${fs}"; then + # Filesystem module could be loaded and should be supported now + : + else + # Not supported, try next one + continue + fi + if which "mkfs.$fs" ; then + case "$fs" in + reiserfs) + fopt=("-f") + ;; + xfs) + fopt=("-f" "-K") + ;; + ext2|ext3) + fopt=("-F") + ;; + ext4) + fopt=(-F -b 4096 -O "extent,huge_file,flex_bg,metadata_csum,64bit,dir_nlink,extra_isize,quota" -E "nodiscard,quotatype=usrquota:prjquota" -I 256) + ;; + jfs) + fopt=() + ;; + *) + fopt=() + ;; + esac + get_mount_options "$fs" MOUNT_OPTIONS_SET_BY_FORMAT_DISK + "mkfs.$fs" "${fopt[@]}" "${target}" && return 0 # Success! + fi + done + return 1 +} + +wait_for_udev () { + local upid ctr hdd + hdd= + if [ "x$1" = "x--hdd" ]; then + hdd=true + shift + fi + ctr=$(( "$1" * 10 )) + if ! [ "$ctr" -gt 0 ]; then # Negation to catch NaN + ctr=1 + fi + udevadm trigger & + usleep 20000 # 20ms + udevadm settle &> /dev/null & # --timeout doesn't work reliably, sometimes the process just hangs + upid=$! + while [ "$ctr" -gt 0 ]; do + [ -n "$hdd" ] && has_hdd && break + [ -z "$hdd" ] && ! [ -d "/proc/$upid" ] && break + usleep 100000 # 100ms + ctr=$(( ctr - 1 )) + done + if [ -d "/proc/$upid" ]; then + kill -9 "$upid" &> /dev/null & + fi +} + +has_hdd () { + [ -n "$( ls -U -1 /dev/disk/by-path/ )" ] +} + +wait_for_udev 2 + +if ! has_hdd; then + wait_for_udev --hdd 4 +fi + +shopt -s extglob +for disk in /dev/disk/by-path/!(*-part*|*-usb-*); do + [ -L "$disk" ] || continue + fdisk -l "$( readlink -f "$disk" )" +done > "$PARTITION_FILE" +shopt -u extglob +if ! [ -s "$PARTITION_FILE" ]; then + echo "none" > "$PARTITION_FILE" +fi +echo "Partitions:" +cat "$PARTITION_FILE" + +# Check for standard swap partitions and make them available to the system +HAVE_SWAP=no +for PART_DEV in $(dev_find_partitions "82" "0657fd6d-a4ab-43c4-84e5-0933c84b4f4f"); do + if swapon "$PART_DEV" -p 10; then + HAVE_SWAP=yes # low priority, in case we have zram swap, prefer that) + echo -e "$PART_DEV\tswap\t\tswap\t\tdefaults\t 0 0" >> "/etc/fstab" + fi +done + +# Put detected linux partitions (83) into /etc/fstab with "noauto" +for PART_DEV in $(dev_find_partitions "83"); do + mkdir -p "/media/${PART_DEV#/dev/*}" + echo -e "${PART_DEV}\t/media/${PART_DEV#/dev/*}\tauto\t\tnoauto,noexec\t 0 0" >> "/etc/fstab" +done + +# special partition 45 (persistent scratch) to $MOUNT_POINT_45 +HAVE_PARTITION_45=no +get_mount_options "ext4" mopts +# try all the ID45 partitions until one succeeds, from large to small +for PART_DEV in $(dev_find_partitions "45" "87f86132-ff94-4987-b250-454545454545"); do + mkdir -p "$MOUNT_POINT_45" + # Let's see if this is an ext4 partition and if so, whether it has the proper size + # Any fixing should happen first + gettmp "logfile" + COUNT=0 + while true; do + [ "$COUNT" -ge 4 ] && break + let COUNT++ + fsck.ext4 -y "$PART_DEV" &> "$logfile" + RET=$? + if [ "$(( RET & 7 ))" = 4 ]; then + slxlog "partition-45-fsck" "Error fixing file system errors on ID45 partition" "$logfile" + break + fi + [ "$(( RET & 3 ))" != 1 ] && break + done + # awk script to take block count and block size from dumpe2fs output and multiply them to get byte size + fs_size=$(dumpe2fs -h "$PART_DEV" | awk -F: 'BEGIN{a=0;b=0}{if ($1 == "Block count") a=$2; if($1 == "Block size") b=$2;}END{ if (a>0 && b>0) print a" * "b}' | bc) + echo "$PART_DEV has ext4 fs of size $fs_size" + if [ -n "$fs_size" ] && [ "$fs_size" -gt 1000000 ]; then + # It's ext4, see if partition size was changed offline + dev_size=$(blockdev --getsize64 "$PART_DEV") + echo "$PART_DEV has actual size of $dev_size" + if [ -n "$dev_size" ] && [ "$dev_size" -gt 1000000 ]; then + # somewhat sane, see what to do + dev_mb=$(( dev_size / 1024 / 1024 )) + fs_mb=$(( fs_size / 1024 / 1024 )) + echo "Dev: $dev_mb, fs: $fs_mb" + if [ "$(( fs_mb + 100 ))" -lt "$dev_mb" ]; then + # dev size plus 100MB is still smaller than reported fs size -- resize fs + gettmp "logfile" + fsck.ext4 -f -y "$PART_DEV" &> "$logfile" + if resize2fs "$PART_DEV" &>> "$logfile"; then + slxlog "partition-45-resize-ok" "Resized partition $PART_DEV from $fs_mb MiB to $dev_mb MiB" "$logfile" + else + slxlog "partition-45-resize-fail" "Could not enlarge file system size of $PART_DEV from $fs_mb MiB to $dev_mb MiB" "$logfile" + dd if=/dev/zero of="$PART_DEV" bs=1M count=1 &>/dev/null + fi + elif [ "$dev_size" -lt "$fs_size" ]; then + # partition is smaller than expected by fs -- killall + slxlog "partition-45-shrink" "$PART_DEV has ext4 file system which is $fs_mb MiB, but partition size is only $dev_mb MiB. Will wipe partition to be safe..." + dd if=/dev/zero of="$PART_DEV" bs=1M count=1 &>/dev/null + fi + fi + fi + # try to mount + if ! mount -v -t ext4 "${mopts[@]}" "${PART_DEV}" "$MOUNT_POINT_45"; then + # failed, try to format + gettmp "logfile" + if ! format_disk "$PART_DEV" "ext4" &> "$logfile"; then + slxlog "partition-45-format" "Cannot format $PART_DEV with ext4" "$logfile" + continue + fi + gettmp "logfile" + if ! mount -v -t ext4 "${mopts[@]}" "${PART_DEV}" "$MOUNT_POINT_45" &> "$logfile"; then + slxlog "partition-45-newmount" "Cannot mount $PART_DEV with ext4 right after formatting" "$logfile" + continue + fi + fi + # Mount success -- clean up lost+found + find "${MOUNT_POINT_45}/slx_lost+found" -mindepth 1 -maxdepth 1 -mtime +90 -type d -exec rm -rf -- {} \; + if [ -d "${MOUNT_POINT_45}/lost+found" ]; then + touch "${MOUNT_POINT_45}/lost+found" + mkdir -p "${MOUNT_POINT_45}/slx_lost+found" + mv -f -- "${MOUNT_POINT_45}/lost+found" "${MOUNT_POINT_45}/slx_lost+found/$(date +%s)_$$-$RANDOM" + fi + chmod 0700 "${MOUNT_POINT_45}/slx_lost+found" + chown 0:0 "${MOUNT_POINT_45}/slx_lost+found" + # fstab entry + echo -e "${PART_DEV}\t${MOUNT_POINT_45}\tauto\t\tnoauto\t\t 0 0" >> "/etc/fstab" + HAVE_PARTITION_45=yes + break # success, done +done + +# and 46 to /media/devXX +for PART_DEV in $(dev_find_partitions "46"); do + mkdir -p "/media/${PART_DEV#/dev/*}" + echo -e "${PART_DEV}\t/media/${PART_DEV#/dev/*}\tauto\t\tnoauto\t\t 0 0" >> "/etc/fstab" +done + +# finally, prepare the data subdir on persistent part +if [ "$HAVE_PARTITION_45" = "yes" ]; then + mkdir -p "$MOUNT_POINT_45/data" + chown root:root "$MOUNT_POINT_45" "$MOUNT_POINT_45/data" + chmod a+rwxt "$MOUNT_POINT_45/data" +elif [ -d "$MOUNT_POINT_45" ]; then + rm -f -- "$MOUNT_POINT_45" +fi + +mount -a + +if [ "$HAVE_SWAP" = "no" ]; then + TOTAL_RAM=$(grep ^MemTotal /proc/meminfo | awk '{print $2}') + if [ -n "$TOTAL_RAM" ] && [ "$TOTAL_RAM" -lt "3000000" ]; then + slxlog "partition-swap" "Have no (formatted) swap partition, using zram swap only!" "$PARTITION_FILE" + fi +fi + +exit 0 + |