#!/bin/bash
#
# Copyright (C) 2007-2020 Red Hat, Inc. All rights reserved.
#
# This file is part of LVM2.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions
# of the GNU General Public License v.2.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#
# Author: Zdenek Kabelac <zkabelac at redhat.com>
#
# Script for resizing devices (usable for LVM resize)
#
# Needed utilities:
# mount, umount, grep, readlink, blockdev, blkid, fsck, xfs_check, cryptsetup
#
# ext2/ext3/ext4: resize2fs, tune2fs
# reiserfs: resize_reiserfs, reiserfstune
# xfs: xfs_growfs, xfs_info
#
# Return values:
# 0 success
# 1 error
# 2 break detected
# 3 unsupported online filesystem check for given mounted fs
set -euE -o pipefail
TOOL=fsadm
_SAVEPATH=$PATH
PATH="/sbin:/usr/sbin:/bin:/usr/sbin:$PATH"
# utilities
TUNE_EXT=tune2fs
RESIZE_EXT=resize2fs
TUNE_REISER=reiserfstune
RESIZE_REISER=resize_reiserfs
TUNE_XFS=xfs_info
RESIZE_XFS=xfs_growfs
MOUNT=mount
UMOUNT=umount
MKDIR=mkdir
RMDIR=rmdir
BLOCKDEV=blockdev
BLKID=blkid
DATE=date
GREP=grep
READLINK=readlink
READLINK_E="-e"
FSCK=fsck
XFS_CHECK=xfs_check
# XFS_REPAIR -n is used when XFS_CHECK is not found
XFS_REPAIR=xfs_repair
CRYPTSETUP=cryptsetup
# user may override lvm location by setting LVM_BINARY
LVM=${LVM_BINARY:-lvm}
YES="${_FSADM_YES-}"
DRY=0
VERB=
FORCE=
EXTOFF=${_FSADM_EXTOFF:-0}
DO_LVRESIZE=0
FSTYPE=unknown
VOLUME=unknown
TEMPDIR="${TMPDIR:-/tmp}/${TOOL}_${RANDOM}$$/m"
DM_DEV_DIR="${DM_DEV_DIR:-/dev}"
BLOCKSIZE=
BLOCKCOUNT=
MOUNTPOINT=
MOUNTED=
REMOUNT=
PROCDIR="/proc"
PROCMOUNTS="$PROCDIR/mounts"
PROCSELFMOUNTINFO="$PROCDIR/self/mountinfo"
NULL="$DM_DEV_DIR/null"
IFS_OLD=$IFS
# without bash $'\n'
NL='
'
tool_usage() {
echo "${TOOL}: Utility to resize or check the filesystem on a device"
echo
echo " ${TOOL} [options] check <device>"
echo " - Check the filesystem on device using fsck"
echo
echo " ${TOOL} [options] resize <device> [<new_size>[BKMGTPE]]"
echo " - Change the size of the filesystem on device to new_size"
echo
echo " Options:"
echo " -h | --help Show this help message"
echo " -v | --verbose Be verbose"
echo " -e | --ext-offline unmount filesystem before ext2/ext3/ext4 resize"
echo " -f | --force Bypass sanity checks"
echo " -n | --dry-run Print commands without running them"
echo " -l | --lvresize Resize given device (if it is LVM device)"
echo " -c | --cryptresize Resize given crypt device"
echo " -y | --yes Answer \"yes\" at any prompts"
echo
echo " new_size - Absolute number of filesystem blocks to be in the filesystem,"
echo " or an absolute size using a suffix (in powers of 1024)."
echo " If new_size is not supplied, the whole device is used."
exit
}
verbose() {
test -z "$VERB" || echo "$TOOL:" "$@"
}
# Support multi-line error messages
error() {
for i in "$@" ; do
echo "$TOOL: $i" >&2
done
cleanup 1
}
dry() {
if [ "$DRY" -ne 0 ]; then
verbose "Dry execution" "$@"
return 0
fi
verbose "Executing" "$@"
$@
}
# Accept as succss also return code 1 with fsck
accept_0_1() {
$@
local ret="$?"
test "$ret" -eq 1 || return "$ret"
# Filesystem was corrected
}
cleanup() {
trap '' 2
# reset MOUNTPOINT - avoid recursion
test "$MOUNTPOINT" = "$TEMPDIR" && MOUNTPOINT="" temp_umount
if [ -n "$REMOUNT" ]; then
verbose "Remounting unmounted filesystem back"
dry "$MOUNT" "$VOLUME" "$MOUNTED"
fi
IFS=$IFS_OLD
trap 2
test "$1" -eq 2 && verbose "Break detected"
if [ "$DO_LVRESIZE" -eq 2 ]; then
# start LVRESIZE with the filesystem modification flag
# and allow recursive call of fsadm
_FSADM_YES=$YES
_FSADM_EXTOFF=$EXTOFF
export _FSADM_YES _FSADM_EXTOFF
unset FSADM_RUNNING
test -n "$LVM_BINARY" && PATH=$_SAVEPATH
dry exec "$LVM" lvresize $VERB $FORCE -r -L"${NEWSIZE_ORIG}b" "$VOLUME_ORIG"
fi
# error exit status for break
exit "${1:-1}"
}
# convert parameter from Exa/Peta/Tera/Giga/Mega/Kilo/Bytes and blocks
# (2^(60/50/40/30/20/10/0))
decode_size() {
case "$1" in
*[eE]) NEWSIZE=$(( ${1%[eE]} * 1152921504606846976 )) ;;
*[pP]) NEWSIZE=$(( ${1%[pP]} * 1125899906842624 )) ;;
*[tT]) NEWSIZE=$(( ${1%[tT]} * 1099511627776 )) ;;
*[gG]) NEWSIZE=$(( ${1%[gG]} * 1073741824 )) ;;
*[mM]) NEWSIZE=$(( ${1%[mM]} * 1048576 )) ;;
*[kK]) NEWSIZE=$(( ${1%[kK]} * 1024 )) ;;
*[bB]) NEWSIZE=${1%[bB]} ;;
*) NEWSIZE=$(( $1 * $2 )) ;;
esac
#NEWBLOCKCOUNT=$(round_block_size $NEWSIZE $2)
NEWBLOCKCOUNT=$(( NEWSIZE / $2 ))
if [ "$DO_LVRESIZE" -eq 1 ]; then
# start lvresize, but first cleanup mounted dirs
DO_LVRESIZE=2
cleanup 0
fi
}
decode_major_minor() {
# 0x00000fff00 mask MAJOR
# 0xfffff000ff mask MINOR
#MINOR=$(( $1 / 1048576 ))
#MAJOR=$(( ($1 - ${MINOR} * 1048576) / 256 ))
#MINOR=$(( $1 - ${MINOR} * 1048576 - ${MAJOR} * 256 + ${MINOR} * 256))
echo "$(( ( $1 >> 8 ) & 4095 )):$(( ( ( $1 >> 12 ) & 268435200 ) | ( $1 & 255 ) ))"
}
# detect filesystem on the given device
# dereference device name if it is symbolic link
detect_fs() {
test -n "${VOLUME_ORIG-}" || VOLUME_ORIG=$1
VOLUME=${1/#"${DM_DEV_DIR}/"/}
VOLUME=$("$READLINK" $READLINK_E "$DM_DEV_DIR/$VOLUME")
test -n "$VOLUME" || error "Cannot get readlink \"$1\"."
RVOLUME=$VOLUME
case "$RVOLUME" in
# hardcoded /dev since udev does not create these entries elsewhere
/dev/dm-[0-9]*)
read -r <"/sys/block/${RVOLUME#/dev/}/dm/name" SYSVOLUME 2>&1 && VOLUME="$DM_DEV_DIR/mapper/$SYSVOLUME"
read -r <"/sys/block/${RVOLUME#/dev/}/dev" MAJORMINOR 2>&1 || error "Cannot get major:minor for \"$VOLUME\"."
MAJOR=${MAJORMINOR%%:*}
MINOR=${MAJORMINOR##*:}
;;
*)
STAT=$(stat --format "MAJOR=\$((0x%t)) MINOR=\$((0x%T))" "$RVOLUME")
test -n "$STAT" || error "Cannot get major:minor for \"$VOLUME\"."
eval "$STAT"
MAJORMINOR="${MAJOR}:${MINOR}"
;;
esac
# use null device as cache file to be sure about the result
# not using option '-o value' to be compatible with older version of blkid
FSTYPE=$("$BLKID" -c "$NULL" -s TYPE "$VOLUME")
test -n "$FSTYPE" || error "Cannot get FSTYPE of \"$VOLUME\"."
FSTYPE=${FSTYPE##*TYPE=\"} # cut quotation marks
FSTYPE=${FSTYPE%%\"*}
verbose "\"$FSTYPE\" filesystem found on \"$VOLUME\"."
}
# Check that passed mounted MAJOR:MINOR is not matching $MAJOR:MINOR of resized $VOLUME
validate_mounted_major_minor() {
test "$1" = "$MAJORMINOR" || {
local REFNAME
local CURNAME
REFNAME=$(dmsetup info -c -j "${1%%:*}" -m "${1##*:}" -o name --noheadings 2>"$NULL")
CURNAME=$(dmsetup info -c -j "$MAJOR" -m "$MINOR" -o name --noheadings 2>"$NULL")
error "Cannot ${CHECK+CHECK}${RESIZE+RESIZE} device \"$VOLUME\" without umounting filesystem $MOUNTED first." \
"Mounted filesystem is using device $CURNAME, but referenced device is $REFNAME." \
"Filesystem utilities currently do not support renamed devices."
}
}
# ATM fsresize & fsck tools are not able to work properly
# when mounted device has changed its name.
# So whenever such device no longer exists with original name
# abort further command processing
check_valid_mounted_device() {
local MOUNTEDMAJORMINOR
local VOL
local CURNAME
VOL=$("$READLINK" $READLINK_E "$1")
CURNAME=$(dmsetup info -c -j "$MAJOR" -m "$MINOR" -o name --noheadings)
# more confused, device is not DM....
local SUGGEST="Possibly device \"$1\" has been renamed to \"$CURNAME\"?"
test -n "$CURNAME" || SUGGEST="Mounted volume is not a device mapper device???"
test -n "$VOL" ||
error "Cannot access device \"$1\" referenced by mounted filesystem \"$MOUNTED\"." \
"$SUGGEST" \
"Filesystem utilities currently do not support renamed devices."
case "$VOL" in
# hardcoded /dev since kernel does not create these entries elsewhere
/dev/dm-[0-9]*)
read -r <"/sys/block/${VOL#/dev/}/dev" MOUNTEDMAJORMINOR 2>&1 || error "Cannot get major:minor for \"$VOLUME\"."
;;
*)
STAT=$(stat --format "MOUNTEDMAJORMINOR=\$((0x%t)):\$((0x%T))" "$VOL")
test -n "$STAT" || error "Cannot get major:minor for \"$VOLUME\"."
eval "$STAT"
;;
esac
validate_mounted_major_minor "$MOUNTEDMAJORMINOR"
}
detect_mounted_with_proc_self_mountinfo() {
# Check self mountinfo
# grab major:minor mounted_device mount_point
MOUNTED=$("$GREP" "^[0-9]* [0-9]* $MAJORMINOR " "$PROCSELFMOUNTINFO" 2>"$NULL" | head -1)
# If device is opened and not yet found as self mounted
# check all other mountinfos (since it can be mounted in cgroups)
# Use 'find' to not fail on to long list of args with too many pids
# only 1st. line is needed
test -z "$MOUNTED" &&
test "$(dmsetup info -c --noheading -o open -j "$MAJOR" -m "$MINOR")" -gt 0 &&
MOUNTED=$(find "$PROCDIR" -maxdepth 2 -name mountinfo -print0 | xargs -0 "$GREP" "^[0-9]* [0-9]* $MAJORMINOR " 2>"$NULL" | head -1 2>"$NULL")
# TODO: for performance compare with sed and stop with 1st. match:
# sed -n "/$MAJORMINOR/ {;p;q;}"
# extract 2nd field after ' - ' separator as mouted device
MOUNTDEV=$(echo "${MOUNTED##* - }" | cut -d ' ' -f 2)
MOUNTDEV=$(echo -n -e "$MOUNTDEV")
# extract 5th field as mount point
# echo -e translates \040 to spaces
MOUNTED=$(echo "$MOUNTED" | cut -d ' ' -f 5)
MOUNTED=$(echo -n -e "$MOUNTED")
test -n "$MOUNTED" || return 1 # Not seen mounted anywhere
check_valid_mounted_device "$MOUNTDEV"
}
# With older systems without /proc/*/mountinfo we may need to check
# every mount point as cannot easily depend on the name of mounted
# device (which could have been renamed).
# We need to visit every mount point and check it's major minor
detect_mounted_with_proc_mounts() {
MOUNTED=$("$GREP" "^$VOLUME[ \\t]" "$PROCMOUNTS")
# for empty string try again with real volume name
test -z "$MOUNTED" && MOUNTED=$("$GREP" "^$RVOLUME[ \\t]" "$PROCMOUNTS")
MOUNTDEV=$(echo -n -e "${MOUNTED%% *}")
# cut device name prefix and trim everything past mountpoint
# echo translates \040 to spaces
MOUNTED=${MOUNTED#* }
MOUNTED=$(echo -n -e "${MOUNTED%% *}")
# for systems with different device names - check also mount output
if test -z "$MOUNTED" ; then
# will not work with spaces in paths
MOUNTED=$(LC_ALL=C "$MOUNT" | "$GREP" "^$VOLUME[ \\t]")
test -z "$MOUNTED" && MOUNTED=$(LC_ALL=C "$MOUNT" | "$GREP" "^$RVOLUME[ \\t]")
MOUNTDEV=${MOUNTED%% on *}
MOUNTED=${MOUNTED##* on }
MOUNTED=${MOUNTED% type *} # allow type in the mount name
fi
if test -n "$MOUNTED" ; then
check_valid_mounted_device "$MOUNTDEV"
return 0 # mounted
fi
# If still nothing found and volume is in use
# check every known mount point against MAJOR:MINOR
if test "$(dmsetup info -c --noheading -o open -j "$MAJOR" -m "$MINOR")" -gt 0 ; then
while IFS=$'\n' read -r i ; do
MOUNTDEV=$(echo -n -e "${i%% *}")
MOUNTED=${i#* }
MOUNTED=$(echo -n -e "${MOUNTED%% *}")
STAT=$(stat --format "%d" "$MOUNTED")
validate_mounted_major_minor "$(decode_major_minor "$STAT")"
done < "$PROCMOUNTS"
fi
return 1 # nothing is mounted
}
# check if the given device is already mounted and where
# FIXME: resolve swap usage and device stacking
detect_mounted() {
if test -e "$PROCSELFMOUNTINFO"; then
detect_mounted_with_proc_self_mountinfo
elif test -e "$PROCMOUNTS"; then
detect_mounted_with_proc_mounts
else
error "Cannot detect mounted device \"$VOLUME\"."
fi
}
# get the full size of device in bytes
detect_device_size() {
# check if blockdev supports getsize64
DEVSIZE=$("$BLOCKDEV" --getsize64 "$VOLUME" 2>"$NULL" || true)
if test -n "$DEVSIZE" ; then
DEVSIZE=$("$BLOCKDEV" --getsize "$VOLUME" || true)
test -n "$DEVSIZE" || error "Cannot read size of device \"$VOLUME\"."
SSSIZE=$("$BLOCKDEV" --getss "$VOLUME" || true)
test -n "$SSSIZE" || error "Cannot read sector size of device \"$VOLUME\"."
DEVSIZE=$(( $DEVSIZE * $SSSIZE ))
fi
}
# round up $1 / $2
# could be needed to gaurantee 'at least given size'
# but it makes many troubles
round_up_block_size() {
echo $(( ($1 + $2 - 1) / $2 ))
}
temp_mount() {
dry "$MKDIR" -p -m 0000 "$TEMPDIR" || error "Failed to create $TEMPDIR."
dry "$MOUNT" "$VOLUME" "$TEMPDIR" || error "Failed to mount $TEMPDIR."
}
temp_umount() {
dry "$UMOUNT" "$TEMPDIR" || error "Failed to umount \"$TEMPDIR\"."
dry "$RMDIR" "${TEMPDIR}" || error "Failed to remove \"$TEMPDIR\","
dry "$RMDIR" "${TEMPDIR%%m}" || error "Failed to remove \"${TEMPDIR%%m}\"."
}
yes_no() {
echo -n "$@" "? [Y|n] "
if [ -n "$YES" ]; then
echo y ; return 0
fi
while read -r -s -n 1 ANS ; do
case "$ANS" in
"y" | "Y" ) echo y ; return 0 ;;
"n" | "N") break ;;
"" ) if [ -t 1 ] ; then
echo y ; return 0
fi ;;
esac
done
echo n
return 1
}
try_umount() {
yes_no "Do you want to unmount \"$MOUNTED\"" && dry "$UMOUNT" "$MOUNTED" && return 0
error "Cannot proceed with mounted filesystem \"$MOUNTED\"."
}
validate_parsing() {
if test -z "$BLOCKSIZE" || test -z "$BLOCKCOUNT" ; then
error "Cannot parse $1 output."
fi
}
####################################
# Resize ext2/ext3/ext4 filesystem
# - unmounted or mounted for upsize
# - unmounted for downsize
####################################
resize_ext() {
local IS_MOUNTED=0
detect_mounted && IS_MOUNTED=1
verbose "Parsing $TUNE_EXT -l \"$VOLUME\""
for i in $(LC_ALL=C "$TUNE_EXT" -l "$VOLUME"); do
case "$i" in
"Block size"*) BLOCKSIZE=${i##* } ;;
"Block count"*) BLOCKCOUNT=${i##* } ;;
esac
done
validate_parsing "$TUNE_EXT"
decode_size "$1" "$BLOCKSIZE"
FSFORCE=$FORCE
if test "$NEWBLOCKCOUNT" -lt "$BLOCKCOUNT" || test "$EXTOFF" -eq 1 ; then
test "$IS_MOUNTED" -eq 1 && verbose "$RESIZE_EXT needs unmounted filesystem" && try_umount
REMOUNT=$MOUNTED
if test -n "$MOUNTED" ; then
# Forced fsck -f for umounted extX filesystem.
case "$-" in
*i*) FLAG=$YES ;;
*) FLAG="-p" ;;
esac
accept_0_1 dry "$FSCK" -f $FLAG "$VOLUME" || error "Failed to fsck $VOLUME"
fi
fi
verbose "Resizing filesystem on device \"$VOLUME\" to $NEWSIZE bytes ($BLOCKCOUNT -> $NEWBLOCKCOUNT blocks of $BLOCKSIZE bytes)"
dry "$RESIZE_EXT" $FSFORCE "$VOLUME" "$NEWBLOCKCOUNT"
}
#############################
# Resize reiserfs filesystem
# - unmounted for upsize
# - unmounted for downsize
#############################
resize_reiser() {
detect_mounted && verbose "ReiserFS resizes only unmounted filesystem" && try_umount
REMOUNT=$MOUNTED
verbose "Parsing $TUNE_REISER \"$VOLUME\""
for i in $(LC_ALL=C "$TUNE_REISER" "$VOLUME"); do
case "$i" in
"Blocksize"*) BLOCKSIZE=${i##*: } ;;
"Count of blocks"*) BLOCKCOUNT=${i##*: } ;;
esac
done
validate_parsing "$TUNE_REISER"
decode_size "$1" "$BLOCKSIZE"
verbose "Resizing \"$VOLUME\" $BLOCKCOUNT -> $NEWBLOCKCOUNT blocks ($NEWSIZE bytes, bs: $NEWBLOCKCOUNT)"
if [ -n "$YES" ]; then
echo y | dry "$RESIZE_REISER" -s "$NEWSIZE" "$VOLUME"
else
dry "$RESIZE_REISER" -s "$NEWSIZE" "$VOLUME"
fi
}
########################
# Resize XFS filesystem
# - mounted for upsize
# - cannot downsize
########################
resize_xfs() {
detect_mounted
MOUNTPOINT=$MOUNTED
if [ -z "$MOUNTED" ]; then
MOUNTPOINT=$TEMPDIR
temp_mount || error "Cannot mount Xfs filesystem."
fi
verbose "Parsing $TUNE_XFS \"$MOUNTPOINT\""
for i in $(LC_ALL=C "$TUNE_XFS" "$MOUNTPOINT"); do
case "$i" in
"data"*) BLOCKSIZE=${i##*bsize=} ; BLOCKCOUNT=${i##*blocks=} ;;
esac
done
BLOCKSIZE=${BLOCKSIZE%%[^0-9]*}
BLOCKCOUNT=${BLOCKCOUNT%%[^0-9]*}
validate_parsing "$TUNE_XFS"
decode_size "$1" "$BLOCKSIZE"
if [ "$NEWBLOCKCOUNT" -gt "$BLOCKCOUNT" ]; then
verbose "Resizing Xfs mounted on \"$MOUNTPOINT\" to fill device \"$VOLUME\""
dry "$RESIZE_XFS" "$MOUNTPOINT"
elif [ "$NEWBLOCKCOUNT" -eq "$BLOCKCOUNT" ]; then
verbose "Xfs filesystem already has the right size"
else
error "Xfs filesystem shrinking is unsupported."
fi
}
# Find active LUKS device on original volume
# 1) look for LUKS device with well-known UUID format (CRYPT-LUKS[12]-<uuid>-<dmname>)
# 2) the dm-crypt device has to be on top of original device (dont't support detached LUKS headers)
detect_luks_device() {
local _LUKS_VERSION
local _LUKS_UUID
CRYPT_NAME=""
CRYPT_DATA_OFFSET=""
_LUKS_VERSION=$("$CRYPTSETUP" luksDump "$VOLUME" 2>"$NULL" | "$GREP" "Version:")
if [ -z "$_LUKS_VERSION" ]; then
verbose "Failed to parse LUKS version on volume \"$VOLUME\""
return
fi
_LUKS_VERSION=${_LUKS_VERSION//[Version:[:space:]]/}
_LUKS_UUID=$("$CRYPTSETUP" luksDump "$VOLUME" 2>"$NULL" | "$GREP" "UUID:")
if [ -z "$_LUKS_UUID" ]; then
verbose "Failed to parse LUKS UUID on volume \"$VOLUME\""
return
fi
_LUKS_UUID="CRYPT-LUKS$_LUKS_VERSION-${_LUKS_UUID//[UID:[:space:]-]/}-"
CRYPT_NAME=$(dmsetup info -c --noheadings -S "UUID=~^$_LUKS_UUID&&segments=1&&devnos_used='$MAJOR:$MINOR'" -o name)
test -z "$CRYPT_NAME" || CRYPT_DATA_OFFSET=$(dmsetup table "$CRYPT_NAME" | cut -d ' ' -f 8)
# LUKS device must be active and mapped over volume where detected
if [ -z "$CRYPT_NAME" ] || [ -z "$CRYPT_DATA_OFFSET" ]; then
error "Can not find active LUKS device. Unlock \"$VOLUME\" volume first."
fi
}
######################################
# Resize active LUKS device
# - LUKS must be active for fs resize
######################################
resize_luks() {
local L_NEWSIZE
local L_NEWBLOCKCOUNT
local NAME
local SHRINK=0
detect_luks_device
NAME=$CRYPT_NAME
verbose "Found active LUKS device \"$NAME\" for volume \"$VOLUME\""
decode_size "$1" 512
if [ $((NEWSIZE % 512)) -gt 0 ]; then
error "New size is not sector alligned"
fi
if [ $((NEWBLOCKCOUNT - CRYPT_DATA_OFFSET)) -lt 1 ]; then
error "New size is smaller than minimum ($(((CRYPT_DATA_OFFSET + 1) * 512)) bytes) for LUKS device $VOLUME"
fi
L_NEWBLOCKCOUNT=$((NEWBLOCKCOUNT - CRYPT_DATA_OFFSET))
L_NEWSIZE=$(( L_NEWBLOCKCOUNT * 512))
VOLUME="$DM_DEV_DIR/mapper/$NAME"
detect_device_size
test "$DEVSIZE" -le "$L_NEWSIZE" || SHRINK=1
if [ $SHRINK -eq 1 ]; then
# shrink fs on LUKS device first
resize "$DM_DEV_DIR/mapper/$NAME" "$L_NEWSIZE"b
fi
# resize LUKS device
dry "$CRYPTSETUP" resize "$NAME" --size $L_NEWBLOCKCOUNT || error "Failed to resize active LUKS device"
if [ $SHRINK -eq 0 ]; then
# grow fs on top of LUKS device
resize "$DM_DEV_DIR/mapper/$NAME" "$L_NEWSIZE"b
fi
}
detect_crypt_device() {
local CRYPT_TYPE
local L_NEWSIZE
local TMP
which "$CRYPTSETUP" >"$NULL" 2>&1 || error "$CRYPTSETUP utility required to resize crypt device"
CRYPT_TYPE=$("$CRYPTSETUP" status "$1" 2>"$NULL" | "$GREP" "type:")
test -n "$CRYPT_TYPE" || error "$CRYPTSETUP failed to detect device type on $1."
CRYPT_TYPE=${CRYPT_TYPE##*[[:space:]]}
case "$CRYPT_TYPE" in
LUKS[12]|PLAIN)
verbose "\"$1\" crypt device is type $CRYPT_TYPE"
;;
*)
error "Unsupported crypt type \"$CRYPT_TYPE\""
esac
TMP=$NEWSIZE
decode_size "$2" 512
L_NEWSIZE=$NEWSIZE
NEWSIZE=$TMP
if [ $((L_NEWSIZE % 512)) -ne 0 ]; then
error "New size is not sector alligned"
fi
CRYPT_RESIZE_BLOCKS=$NEWBLOCKCOUNT
if [ "$DEVSIZE" -ge "$L_NEWSIZE" ]; then
CRYPT_SHRINK=1
else
CRYPT_GROW=1
fi
}
#################################
# Resize active crypt device
# (on direct user request only)
#################################
resize_crypt() {
dry "$CRYPTSETUP" resize "$1" --size $CRYPT_RESIZE_BLOCKS || error "$CRYPTSETUP failed to resize device $1"
}
####################
# Resize filesystem
####################
resize() {
NEWSIZE=$2
detect_fs "$1"
detect_device_size
verbose "Device \"$VOLUME\" size is $DEVSIZE bytes"
# if the size parameter is missing use device size
#if [ -n "$NEWSIZE" -a $NEWSIZE <
test -z "$NEWSIZE" && NEWSIZE=${DEVSIZE}b
NEWSIZE_ORIG=${NEWSIZE_ORIG:-$NEWSIZE}
IFS=$NL
test -z "${DO_CRYPTRESIZE-}" || detect_crypt_device "$VOLUME_ORIG" "$NEWSIZE_ORIG"
test -z "${CRYPT_GROW-}" || resize_crypt "$VOLUME_ORIG"
case "$FSTYPE" in
ext[234]) CMD=resize_ext ;;
"reiserfs") CMD=resize_reiser ;;
"xfs") CMD=resize_xfs ;;
"crypto_LUKS")
which "$CRYPTSETUP" >"$NULL" 2>&1 || error "$CRYPTSETUP utility required to resize LUKS volume"
CMD=resize_luks ;;
*) error "Filesystem \"$FSTYPE\" on device \"$VOLUME\" is not supported by this tool." ;;
esac
$CMD $NEWSIZE || error "$FSTYPE resize failed."
test -z "${CRYPT_SHRINK-}" || resize_crypt "$VOLUME_ORIG"
}
####################################
# Calclulate diff between two dates
# LC_ALL=C input is expected the
# only one supported
####################################
diff_dates() {
echo $(( $("$DATE" -u -d"$1" +%s 2>"$NULL") - $("$DATE" -u -d"$2" +%s 2>"$NULL") ))
}
check_luks() {
detect_luks_device
check "$DM_DEV_DIR/mapper/$CRYPT_NAME"
}
###################
# Check filesystem
###################
check() {
detect_fs "$1"
if detect_mounted ; then
verbose "Skipping filesystem check for device \"$VOLUME\" as the filesystem is mounted on $MOUNTED";
cleanup 3
fi
case "$FSTYPE" in
ext[234])
IFS_CHECK=$IFS
IFS=$NL
for i in $(LC_ALL=C "$TUNE_EXT" -l "$VOLUME"); do
case "$i" in
"Last mount"*) LASTMOUNT=${i##*: } ;;
"Last checked"*) LASTCHECKED=${i##*: } ;;
esac
done
case "$LASTMOUNT" in
*"n/a") ;; # nothing to do - system was not mounted yet
*)
LASTDIFF=$(diff_dates "$LASTMOUNT" "$LASTCHECKED")
if test "$LASTDIFF" -gt 0 ; then
verbose "Filesystem has not been checked after the last mount, using fsck -f"
FORCE="-f"
fi
;;
esac
IFS=$IFS_CHECK
esac
case "$FSTYPE" in
"xfs") if which "$XFS_CHECK" >"$NULL" 2>&1 ; then
dry "$XFS_CHECK" "$VOLUME" || error "Xfs check failed."
else
# Replacement for outdated xfs_check
# FIXME: for small devices we need to force_geometry,
# since we run in '-n' mode, it shouldn't be problem.
# Think about better way....
dry "$XFS_REPAIR" -n -o force_geometry "$VOLUME" || error "Xfs repair failed."
fi ;;
ext[234]|"reiserfs")
# check if executed from interactive shell environment
case "$-" in
*i*) FLAG=$YES ;;
*) FLAG="-p" ;;
esac
accept_0_1 dry "$FSCK" $FORCE $FLAG "$VOLUME" || error "Fsck $FSTYPE failed."
;;
"crypto_LUKS")
which "$CRYPTSETUP" >"$NULL" 2>&1 || error "$CRYPTSETUP utility required."
check_luks || error "Crypto luks check failed."
;;
*)
error "Filesystem \"$FSTYPE\" on device \"$VOLUME\" is not supported by this tool." ;;
esac
}
#############################
# start point of this script
# - parsing parameters
#############################
trap "cleanup 2" 2
# test if we are not invoked recursively
test -n "${FSADM_RUNNING-}" && exit 0
# test some prerequisities
for i in "$TUNE_EXT" "$RESIZE_EXT" "$TUNE_REISER" "$RESIZE_REISER" \
"$TUNE_XFS" "$RESIZE_XFS" "$MOUNT" "$UMOUNT" "$MKDIR" \
"$RMDIR" "$BLOCKDEV" "$BLKID" "$GREP" "$READLINK" \
"$DATE" "$FSCK" "$XFS_CHECK" "$XFS_REPAIR" "$LVM" ; do
test -n "$i" || error "Required command definitions in the script are missing!"
done
"$LVM" version >"$NULL" 2>&1 || error "Could not run lvm binary \"$LVM\"."
"$READLINK" -e / >"$NULL" 2>&1 || READLINK_E="-f"
TEST64BIT=$(( 1000 * 1000000000000 ))
test "$TEST64BIT" -eq 1000000000000000 || error "Shell does not handle 64bit arithmetic."
echo Y | "$GREP" Y >"$NULL" || error "Grep does not work properly."
test "$("$DATE" -u -d"Jan 01 00:00:01 1970" +%s)" -eq 1 || error "Date translation does not work."
if [ "$#" -eq 0 ] ; then
tool_usage
fi
CHECK=""
RESIZE=""
NEWSIZE=""
while [ "$#" -ne 0 ]
do
case "$1" in
"") ;;
"-h"|"--help") tool_usage ;;
"-v"|"--verbose") VERB="-v" ;;
"-n"|"--dry-run") DRY=1 ;;
"-f"|"--force") FORCE="-f" ;;
"-e"|"--ext-offline") EXTOFF=1 ;;
"-y"|"--yes") YES="-y" ;;
"-l"|"--lvresize") DO_LVRESIZE=1 ;;
"-c"|"--cryptresize") DO_CRYPTRESIZE=1 ;;
"check") test -z "${2-}" && error "Missing <device>. (see: $TOOL --help)"
CHECK=$2 ; shift ;;
"resize") test -z "${2-}" && error "Missing <device>. (see: $TOOL --help)"
RESIZE=$2 ; shift
if test -n "${2-}" ; then NEWSIZE="${2-}" ; shift ; fi ;;
*) error "Wrong argument \"$1\". (see: $TOOL --help)"
esac
shift
done
test "$YES" = "-y" || YES=""
test "$EXTOFF" -eq 1 || EXTOFF=0
if [ -n "$CHECK" ]; then
check "$CHECK"
elif [ -n "$RESIZE" ]; then
export FSADM_RUNNING="fsadm"
resize "$RESIZE" "$NEWSIZE"
cleanup 0
else
error "Missing command. (see: $TOOL --help)"
fi
Mini Shell