[lvm2.git] / scripts / fsadm.sh

#!/bin/bash
#
# Copyright (C) 2007-2012 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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
#
# 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

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

# 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="${DM_DEV_DIR:-/dev}"
BLOCKSIZE=
BLOCKCOUNT=
MOUNTPOINT=
MOUNTED=
REMOUNT=
PROCMOUNTS="/proc/mounts"
NULL="$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 "    -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 -n "$VERB" && echo "$TOOL: $@" || true
}

error() {
	echo "$TOOL: $@" >&2
	cleanup 1
}

dry() {
	if [ "$DRY" -ne 0 ]; then
		verbose "Dry execution $@"
		return 0
	fi
	verbose "Executing $@"
	"$@"
}

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}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
}

# detect filesystem on the given device
# dereference device name if it is symbolic link
detect_fs() {
	VOLUME_ORIG=$1
	VOLUME=${1/#"${DM_DEV_DIR}/"/}
	VOLUME=$("$READLINK" $READLINK_E "$DM_DEV_DIR/$VOLUME") || error "Cannot get readlink \"$1\""
	RVOLUME=$VOLUME
	case "$RVOLUME" in
          # hardcoded /dev  since udev does not create these entries elsewhere
	  /dev/dm-[0-9]*)
		read </sys/block/${RVOLUME#/dev/}/dm/name SYSVOLUME 2>&1 && VOLUME="$DM_DEV_DIR/mapper/$SYSVOLUME"
		;;
	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") || error "Cannot get FSTYPE of \"$VOLUME\""
	FSTYPE=${FSTYPE##*TYPE=\"} # cut quotation marks
	FSTYPE=${FSTYPE%%\"*}
	verbose "\"$FSTYPE\" filesystem found on \"$VOLUME\""
}

# check if the given device is already mounted and where
# FIXME: resolve swap usage and device stacking
detect_mounted()  {
	test -e "$PROCMOUNTS" || error "Cannot detect mounted device \"$VOLUME\""

	MOUNTED=$("$GREP" "^$VOLUME[ \t]" "$PROCMOUNTS")

	# for empty string try again with real volume name
	test -z "$MOUNTED" && MOUNTED=$("$GREP" "^$RVOLUME[ \t]" "$PROCMOUNTS")

	# 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 "$MOUNTED" ; then
		MOUNTED=$(LANG=C "$MOUNT" | "$GREP" "^$VOLUME[ \t]")
		test -z "$MOUNTED" && MOUNTED=$(LANG=C "$MOUNT" | "$GREP" "^$RVOLUME[ \t]")
		MOUNTED=${MOUNTED##* on }
		MOUNTED=${MOUNTED% type *} # allow type in the mount name
	fi

	test -n "$MOUNTED"
}

# get the full size of device in bytes
detect_device_size() {
	# check if blockdev supports getsize64
	"$BLOCKDEV" 2>&1 | "$GREP" getsize64 >"$NULL"
	if test $? -eq 0; then
		DEVSIZE=$("$BLOCKDEV" --getsize64 "$VOLUME") || error "Cannot read size of device \"$VOLUME\""
	else
		DEVSIZE=$("$BLOCKDEV" --getsize "$VOLUME") || error "Cannot read size of device \"$VOLUME\""
		SSSIZE=$("$BLOCKDEV" --getss "$VOLUME") || error "Cannot block size read 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") echo n ; return 1 ;;
		esac
	done
}

try_umount() {
	yes_no "Do you want to unmount \"$MOUNTED\"" && dry "$UMOUNT" "$MOUNTED" && return 0
	error "Cannot proceed with mounted filesystem \"$MOUNTED\""
}

validate_parsing() {
	test -n "$BLOCKSIZE" -a -n "$BLOCKCOUNT" || error "Cannot parse $1 output"
}
####################################
# Resize ext2/ext3/ext4 filesystem
# - unmounted or mounted for upsize
# - unmounted for downsize
####################################
resize_ext() {
	verbose "Parsing $TUNE_EXT -l \"$VOLUME\""
	for i in $(LANG=C "$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 [ "$NEWBLOCKCOUNT" -lt "$BLOCKCOUNT" -o "$EXTOFF" -eq 1 ]; then
		detect_mounted && verbose "$RESIZE_EXT needs unmounted filesystem" && try_umount
		REMOUNT=$MOUNTED
		if test -n "$MOUNTED" ; then
			# Forced fsck -f for umounted extX filesystem.
			case "$-" in
			  *i*) dry "$FSCK" $YES -f "$VOLUME" ;;
			  *) dry "$FSCK" -f -p "$VOLUME" ;;
			esac
		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 $(LANG=C "$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 $(LANG=C "$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
}

####################
# 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=${DEVSIZE}b
	IFS=$NL
	case "$FSTYPE" in
	  "ext3"|"ext2"|"ext4") resize_ext $NEWSIZE ;;
	  "reiserfs") resize_reiser $NEWSIZE ;;
	  "xfs") resize_xfs $NEWSIZE ;;
	  *) error "Filesystem \"$FSTYPE\" on device \"$VOLUME\" is not supported by this tool" ;;
	esac || error "Resize $FSTYPE failed"
	cleanup 0
}

####################################
# Calclulate diff between two dates
#  LANG=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 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 "$FSTYPE" in
	  "ext2"|"ext3"|"ext4")
		IFS_CHECK=$IFS
		IFS=$NL
		for i in $(LANG=C "$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 "$FSTYPE" in
	  "xfs") dry "$XFS_CHECK" "$VOLUME" ;;
	  *)    # check if executed from interactive shell environment
		case "$-" in
		  *i*) dry "$FSCK" $YES $FORCE "$VOLUME" ;;
		  *) dry "$FSCK" $FORCE -p "$VOLUME" ;;
		esac
	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
test -n "$TUNE_EXT" -a -n "$RESIZE_EXT" -a -n "$TUNE_REISER" -a -n "$RESIZE_REISER" \
  -a -n "$TUNE_XFS" -a -n "$RESIZE_XFS" -a -n "$MOUNT" -a -n "$UMOUNT" -a -n "$MKDIR" \
  -a -n "$RMDIR" -a -n "$BLOCKDEV" -a -n "$BLKID" -a -n "$GREP" -a -n "$READLINK" \
  -a -n "$DATE" -a -n "$FSCK" -a -n "$XFS_CHECK" -a -n "$LVM" \
  || error "Required command definitions in the script are missing!"

"$LVM" version >"$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

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 ;;
	  "check") CHECK="$2" ; shift ;;
	  "resize") RESIZE="$2"; NEWSIZE="$3" ; shift 2 ;;
	  *) 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"
else
	error "Missing command. (see: $TOOL --help)"
fi
Commit	Line	Data
75153387	1	#!/bin/bash
f29e7ac5	2	#
a9382908	3	# Copyright (C) 2007-2012 Red Hat, Inc. All rights reserved.
f29e7ac5 AK	4	#
	5	# This file is part of LVM2.
	6	#
	7	# This copyrighted material is made available to anyone wishing to use,
	8	# modify, copy, or redistribute it subject to the terms and conditions
	9	# of the GNU General Public License v.2.
	10	#
	11	# You should have received a copy of the GNU General Public License
	12	# along with this program; if not, write to the Free Software Foundation,
	13	# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	14	#
50c41b09	15	# Author: Zdenek Kabelac <zkabelac at redhat.com>
f29e7ac5 AK	16	#
	17	# Script for resizing devices (usable for LVM resize)
	18	#
	19	# Needed utilities:
	20	# mount, umount, grep, readlink, blockdev, blkid, fsck, xfs_check
	21	#
cd96532e	22	# ext2/ext3/ext4: resize2fs, tune2fs
f29e7ac5 AK	23	# reiserfs: resize_reiserfs, reiserfstune
	24	# xfs: xfs_growfs, xfs_info
	25	#
4886fa21 ZK	26	# Return values:
	27	# 0 success
	28	# 1 error
	29	# 2 break detected
	30	# 3 unsupported online filesystem check for given mounted fs
f29e7ac5 AK	31
	32	TOOL=fsadm
	33
53c09bce	34	_SAVEPATH=$PATH
f29e7ac5 AK	35	PATH=/sbin:/usr/sbin:/bin:/usr/sbin:$PATH
	36
	37	# utilities
	38	TUNE_EXT=tune2fs
	39	RESIZE_EXT=resize2fs
	40	TUNE_REISER=reiserfstune
	41	RESIZE_REISER=resize_reiserfs
	42	TUNE_XFS=xfs_info
	43	RESIZE_XFS=xfs_growfs
	44
	45	MOUNT=mount
	46	UMOUNT=umount
	47	MKDIR=mkdir
50c41b09 ZK	48	RMDIR=rmdir
	49	BLOCKDEV=blockdev
	50	BLKID=blkid
f0fffb8c	51	DATE=date
f29e7ac5 AK	52	GREP=grep
f29e7ac5 AK	53	READLINK=readlink
9ad2ba2a	54	READLINK_E="-e"
f29e7ac5 AK	55	FSCK=fsck
	56	XFS_CHECK=xfs_check
	57
33048414	58	# user may override lvm location by setting LVM_BINARY
0d9ed7ad	59	LVM=${LVM_BINARY:-lvm}
17dd04ca	60
685940c0	61	YES=${_FSADM_YES}
f29e7ac5	62	DRY=0
17dd04ca	63	VERB=
f29e7ac5	64	FORCE=
a9382908	65	EXTOFF=${_FSADM_EXTOFF:-0}
17dd04ca	66	DO_LVRESIZE=0
f29e7ac5 AK	67	FSTYPE=unknown
	68	VOLUME=unknown
	69	TEMPDIR="${TMPDIR:-/tmp}/${TOOL}_${RANDOM}$$/m"
8f8c5580	70	DM_DEV_DIR="${DM_DEV_DIR:-/dev}"
f29e7ac5 AK	71	BLOCKSIZE=
	72	BLOCKCOUNT=
	73	MOUNTPOINT=
	74	MOUNTED=
	75	REMOUNT=
55b94bf3	76	PROCMOUNTS="/proc/mounts"
8f8c5580	77	NULL="$DM_DEV_DIR/null"
f29e7ac5 AK	78
f29e7ac5 AK	79	IFS_OLD=$IFS
33048414 ZK	80	# without bash $'\n'
	81	NL='
	82	'
f29e7ac5 AK	83
f29e7ac5 AK	84	tool_usage() {
d7b5bfc2 AK	85	echo "${TOOL}: Utility to resize or check the filesystem on a device"
	86	echo
	87	echo " ${TOOL} [options] check device"
	88	echo " - Check the filesystem on device using fsck"
	89	echo
50c41b09	90	echo " ${TOOL} [options] resize device [new_size[BKMGTPE]]"
d7b5bfc2 AK	91	echo " - Change the size of the filesystem on device to new_size"
	92	echo
	93	echo " Options:"
	94	echo " -h \| --help Show this help message"
	95	echo " -v \| --verbose Be verbose"
cd96532e	96	echo " -e \| --ext-offline unmount filesystem before ext2/ext3/ext4 resize"
d7b5bfc2 AK	97	echo " -f \| --force Bypass sanity checks"
d7b5bfc2 AK	98	echo " -n \| --dry-run Print commands without running them"
17dd04ca	99	echo " -l \| --lvresize Resize given device (if it is LVM device)"
d7b5bfc2 AK	100	echo " -y \| --yes Answer \"yes\" at any prompts"
	101	echo
	102	echo " new_size - Absolute number of filesystem blocks to be in the filesystem,"
	103	echo " or an absolute size using a suffix (in powers of 1024)."
	104	echo " If new_size is not supplied, the whole device is used."
	105
f29e7ac5 AK	106	exit
	107	}
	108
	109	verbose() {
17dd04ca	110	test -n "$VERB" && echo "$TOOL: $@" \|\| true
f29e7ac5 AK	111	}
	112
	113	error() {
	114	echo "$TOOL: $@" >&2
	115	cleanup 1
	116	}
	117
	118	dry() {
50c41b09 ZK	119	if [ "$DRY" -ne 0 ]; then
	120	verbose "Dry execution $@"
	121	return 0
	122	fi
f29e7ac5	123	verbose "Executing $@"
a9382908	124	"$@"
f29e7ac5 AK	125	}
	126
	127	cleanup() {
	128	trap '' 2
	129	# reset MOUNTPOINT - avoid recursion
	130	test "$MOUNTPOINT" = "$TEMPDIR" && MOUNTPOINT="" temp_umount
	131	if [ -n "$REMOUNT" ]; then
	132	verbose "Remounting unmounted filesystem back"
d2010960	133	dry "$MOUNT" "$VOLUME" "$MOUNTED"
f29e7ac5 AK	134	fi
	135	IFS=$IFS_OLD
	136	trap 2
17dd04ca	137
4886fa21 ZK	138	test "$1" -eq 2 && verbose "Break detected"
4886fa21 ZK	139
fd867543 ZK	140	if [ "$DO_LVRESIZE" -eq 2 ]; then
	141	# start LVRESIZE with the filesystem modification flag
	142	# and allow recursive call of fsadm
685940c0	143	_FSADM_YES=$YES
a9382908 ZK	144	_FSADM_EXTOFF=$EXTOFF
a9382908 ZK	145	export _FSADM_YES _FSADM_EXTOFF
fd867543	146	unset FSADM_RUNNING
53c09bce	147	test -n "$LVM_BINARY" && PATH=$_SAVEPATH
d2010960	148	dry exec "$LVM" lvresize $VERB $FORCE -r -L${NEWSIZE}b "$VOLUME_ORIG"
fd867543	149	fi
53c09bce	150
829fe014 ZK	151	# error exit status for break
829fe014 ZK	152	exit ${1:-1}
f29e7ac5 AK	153	}
f29e7ac5 AK	154
50c41b09 ZK	155	# convert parameter from Exa/Peta/Tera/Giga/Mega/Kilo/Bytes and blocks
50c41b09 ZK	156	# (2^(60/50/40/30/20/10/0))
f29e7ac5 AK	157	decode_size() {
f29e7ac5 AK	158	case "$1" in
50c41b09 ZK	159	[eE]) NEWSIZE=$(( ${1%[eE]} 1152921504606846976 )) ;;
50c41b09 ZK	160	[pP]) NEWSIZE=$(( ${1%[pP]} 1125899906842624 )) ;;
f29e7ac5 AK	161	[tT]) NEWSIZE=$(( ${1%[tT]} 1099511627776 )) ;;
	162	[gG]) NEWSIZE=$(( ${1%[gG]} 1073741824 )) ;;
	163	[mM]) NEWSIZE=$(( ${1%[mM]} 1048576 )) ;;
	164	[kK]) NEWSIZE=$(( ${1%[kK]} 1024 )) ;;
	165	*[bB]) NEWSIZE=${1%[bB]} ;;
	166	) NEWSIZE=$(( $1 $2 )) ;;
	167	esac
	168	#NEWBLOCKCOUNT=$(round_block_size $NEWSIZE $2)
	169	NEWBLOCKCOUNT=$(( $NEWSIZE / $2 ))
17dd04ca ZK	170
	171	if [ $DO_LVRESIZE -eq 1 ]; then
	172	# start lvresize, but first cleanup mounted dirs
	173	DO_LVRESIZE=2
	174	cleanup 0
	175	fi
f29e7ac5 AK	176	}
	177
	178	# detect filesystem on the given device
	179	# dereference device name if it is symbolic link
	180	detect_fs() {
55b94bf3	181	VOLUME_ORIG=$1
8f8c5580 ZK	182	VOLUME=${1/#"${DM_DEV_DIR}/"/}
8f8c5580 ZK	183	VOLUME=$("$READLINK" $READLINK_E "$DM_DEV_DIR/$VOLUME") \|\| error "Cannot get readlink \"$1\""
55b94bf3 ZK	184	RVOLUME=$VOLUME
55b94bf3 ZK	185	case "$RVOLUME" in
8f8c5580	186	# hardcoded /dev since udev does not create these entries elsewhere
55b94bf3	187	/dev/dm-[0-9]*)
8f8c5580	188	read </sys/block/${RVOLUME#/dev/}/dm/name SYSVOLUME 2>&1 && VOLUME="$DM_DEV_DIR/mapper/$SYSVOLUME"
55b94bf3 ZK	189	;;
55b94bf3 ZK	190	esac
8f8c5580	191	# use null device as cache file to be sure about the result
284f4496	192	# not using option '-o value' to be compatible with older version of blkid
8f8c5580	193	FSTYPE=$("$BLKID" -c "$NULL" -s TYPE "$VOLUME") \|\| error "Cannot get FSTYPE of \"$VOLUME\""
284f4496 ZK	194	FSTYPE=${FSTYPE##*TYPE=\"} # cut quotation marks
284f4496 ZK	195	FSTYPE=${FSTYPE%%\"*}
f29e7ac5 AK	196	verbose "\"$FSTYPE\" filesystem found on \"$VOLUME\""
	197	}
	198
	199	# check if the given device is already mounted and where
55b94bf3	200	# FIXME: resolve swap usage and device stacking
f29e7ac5	201	detect_mounted() {
d2010960	202	test -e "$PROCMOUNTS" \|\| error "Cannot detect mounted device \"$VOLUME\""
55b94bf3	203
a9382908	204	MOUNTED=$("$GREP" "^$VOLUME[ \t]" "$PROCMOUNTS")
55b94bf3 ZK	205
55b94bf3 ZK	206	# for empty string try again with real volume name
a9382908	207	test -z "$MOUNTED" && MOUNTED=$("$GREP" "^$RVOLUME[ \t]" "$PROCMOUNTS")
55b94bf3 ZK	208
	209	# cut device name prefix and trim everything past mountpoint
	210	# echo translates \040 to spaces
	211	MOUNTED=${MOUNTED#* }
	212	MOUNTED=$(echo -n -e ${MOUNTED%% *})
a9d6333b ZK	213
	214	# for systems with different device names - check also mount output
	215	if test -z "$MOUNTED" ; then
a9382908 ZK	216	MOUNTED=$(LANG=C "$MOUNT" \| "$GREP" "^$VOLUME[ \t]")
a9382908 ZK	217	test -z "$MOUNTED" && MOUNTED=$(LANG=C "$MOUNT" \| "$GREP" "^$RVOLUME[ \t]")
a9d6333b ZK	218	MOUNTED=${MOUNTED##* on }
	219	MOUNTED=${MOUNTED% type *} # allow type in the mount name
	220	fi
	221
f29e7ac5 AK	222	test -n "$MOUNTED"
	223	}
	224
	225	# get the full size of device in bytes
	226	detect_device_size() {
9ad2ba2a	227	# check if blockdev supports getsize64
8f8c5580	228	"$BLOCKDEV" 2>&1 \| "$GREP" getsize64 >"$NULL"
c8669f6b	229	if test $? -eq 0; then
d2010960	230	DEVSIZE=$("$BLOCKDEV" --getsize64 "$VOLUME") \|\| error "Cannot read size of device \"$VOLUME\""
9ad2ba2a	231	else
d2010960 ZK	232	DEVSIZE=$("$BLOCKDEV" --getsize "$VOLUME") \|\| error "Cannot read size of device \"$VOLUME\""
d2010960 ZK	233	SSSIZE=$("$BLOCKDEV" --getss "$VOLUME") \|\| error "Cannot block size read device \"$VOLUME\""
9ad2ba2a ZK	234	DEVSIZE=$(($DEVSIZE * $SSSIZE))
9ad2ba2a ZK	235	fi
f29e7ac5 AK	236	}
	237
	238	# round up $1 / $2
	239	# could be needed to gaurantee 'at least given size'
	240	# but it makes many troubles
	241	round_up_block_size() {
	242	echo $(( ($1 + $2 - 1) / $2 ))
	243	}
	244
	245	temp_mount() {
d2010960 ZK	246	dry "$MKDIR" -p -m 0000 "$TEMPDIR" \|\| error "Failed to create $TEMPDIR"
d2010960 ZK	247	dry "$MOUNT" "$VOLUME" "$TEMPDIR" \|\| error "Failed to mount $TEMPDIR"
f29e7ac5 AK	248	}
	249
	250	temp_umount() {
d2010960 ZK	251	dry "$UMOUNT" "$TEMPDIR" \|\| error "Failed to umount \"$TEMPDIR\""
	252	dry "$RMDIR" "${TEMPDIR}" \|\| error "Failed to remove \"$TEMPDIR\""
	253	dry "$RMDIR" "${TEMPDIR%%m}" \|\| error "Failed to remove \"${TEMPDIR%%m}\""
f29e7ac5 AK	254	}
	255
	256	yes_no() {
	257	echo -n "$@? [Y\|n] "
c8669f6b	258
f29e7ac5	259	if [ -n "$YES" ]; then
c8669f6b	260	echo y ; return 0
f29e7ac5	261	fi
c8669f6b ZK	262
	263	while read -r -s -n 1 ANS ; do
	264	case "$ANS" in
	265	"y" \| "Y" \| "") echo y ; return 0 ;;
	266	"n" \| "N") echo n ; return 1 ;;
	267	esac
	268	done
f29e7ac5 AK	269	}
	270
	271	try_umount() {
d2010960	272	yes_no "Do you want to unmount \"$MOUNTED\"" && dry "$UMOUNT" "$MOUNTED" && return 0
3a6e5f36	273	error "Cannot proceed with mounted filesystem \"$MOUNTED\""
f29e7ac5 AK	274	}
	275
	276	validate_parsing() {
	277	test -n "$BLOCKSIZE" -a -n "$BLOCKCOUNT" \|\| error "Cannot parse $1 output"
	278	}
	279	####################################
cd96532e	280	# Resize ext2/ext3/ext4 filesystem
f29e7ac5 AK	281	# - unmounted or mounted for upsize
	282	# - unmounted for downsize
	283	####################################
	284	resize_ext() {
	285	verbose "Parsing $TUNE_EXT -l \"$VOLUME\""
d2010960	286	for i in $(LANG=C "$TUNE_EXT" -l "$VOLUME"); do
f29e7ac5 AK	287	case "$i" in
	288	"Block size") BLOCKSIZE=${i## } ;;
	289	"Block count") BLOCKCOUNT=${i## } ;;
	290	esac
	291	done
d2010960	292	validate_parsing "$TUNE_EXT"
f29e7ac5 AK	293	decode_size $1 $BLOCKSIZE
	294	FSFORCE=$FORCE
	295
50c41b09	296	if [ "$NEWBLOCKCOUNT" -lt "$BLOCKCOUNT" -o "$EXTOFF" -eq 1 ]; then
f29e7ac5 AK	297	detect_mounted && verbose "$RESIZE_EXT needs unmounted filesystem" && try_umount
f29e7ac5 AK	298	REMOUNT=$MOUNTED
a9d6333b ZK	299	if test -n "$MOUNTED" ; then
	300	# Forced fsck -f for umounted extX filesystem.
	301	case "$-" in
d2010960 ZK	302	i) dry "$FSCK" $YES -f "$VOLUME" ;;
d2010960 ZK	303	*) dry "$FSCK" -f -p "$VOLUME" ;;
a9d6333b ZK	304	esac
a9d6333b ZK	305	fi
f29e7ac5 AK	306	fi
f29e7ac5 AK	307
c8669f6b	308	verbose "Resizing filesystem on device \"$VOLUME\" to $NEWSIZE bytes ($BLOCKCOUNT -> $NEWBLOCKCOUNT blocks of $BLOCKSIZE bytes)"
d2010960	309	dry "$RESIZE_EXT" $FSFORCE "$VOLUME" $NEWBLOCKCOUNT
f29e7ac5 AK	310	}
	311
	312	#############################
	313	# Resize reiserfs filesystem
	314	# - unmounted for upsize
	315	# - unmounted for downsize
	316	#############################
	317	resize_reiser() {
c8669f6b ZK	318	detect_mounted && verbose "ReiserFS resizes only unmounted filesystem" && try_umount
c8669f6b ZK	319	REMOUNT=$MOUNTED
f29e7ac5	320	verbose "Parsing $TUNE_REISER \"$VOLUME\""
d2010960	321	for i in $(LANG=C "$TUNE_REISER" "$VOLUME"); do
f29e7ac5 AK	322	case "$i" in
	323	"Blocksize") BLOCKSIZE=${i##: } ;;
	324	"Count of blocks") BLOCKCOUNT=${i##: } ;;
	325	esac
	326	done
d2010960	327	validate_parsing "$TUNE_REISER"
f29e7ac5 AK	328	decode_size $1 $BLOCKSIZE
	329	verbose "Resizing \"$VOLUME\" $BLOCKCOUNT -> $NEWBLOCKCOUNT blocks ($NEWSIZE bytes, bs: $NEWBLOCKCOUNT)"
	330	if [ -n "$YES" ]; then
d2010960	331	echo y \| dry "$RESIZE_REISER" -s $NEWSIZE "$VOLUME"
f29e7ac5	332	else
d2010960	333	dry "$RESIZE_REISER" -s $NEWSIZE "$VOLUME"
f29e7ac5 AK	334	fi
	335	}
	336
	337	########################
	338	# Resize XFS filesystem
	339	# - mounted for upsize
3a6e5f36	340	# - cannot downsize
f29e7ac5 AK	341	########################
	342	resize_xfs() {
	343	detect_mounted
	344	MOUNTPOINT=$MOUNTED
	345	if [ -z "$MOUNTED" ]; then
	346	MOUNTPOINT=$TEMPDIR
	347	temp_mount \|\| error "Cannot mount Xfs filesystem"
	348	fi
	349	verbose "Parsing $TUNE_XFS \"$MOUNTPOINT\""
d2010960	350	for i in $(LANG=C "$TUNE_XFS" "$MOUNTPOINT"); do
f29e7ac5 AK	351	case "$i" in
	352	"data") BLOCKSIZE=${i##bsize=} ; BLOCKCOUNT=${i##*blocks=} ;;
	353	esac
	354	done
	355	BLOCKSIZE=${BLOCKSIZE%%[^0-9]*}
	356	BLOCKCOUNT=${BLOCKCOUNT%%[^0-9]*}
d2010960	357	validate_parsing "$TUNE_XFS"
f29e7ac5 AK	358	decode_size $1 $BLOCKSIZE
	359	if [ $NEWBLOCKCOUNT -gt $BLOCKCOUNT ]; then
	360	verbose "Resizing Xfs mounted on \"$MOUNTPOINT\" to fill device \"$VOLUME\""
d2010960	361	dry "$RESIZE_XFS" $MOUNTPOINT
f29e7ac5 AK	362	elif [ $NEWBLOCKCOUNT -eq $BLOCKCOUNT ]; then
	363	verbose "Xfs filesystem already has the right size"
	364	else
	365	error "Xfs filesystem shrinking is unsupported"
	366	fi
	367	}
	368
	369	####################
	370	# Resize filesystem
	371	####################
	372	resize() {
17dd04ca	373	NEWSIZE=$2
f29e7ac5 AK	374	detect_fs "$1"
f29e7ac5 AK	375	detect_device_size
c8669f6b	376	verbose "Device \"$VOLUME\" size is $DEVSIZE bytes"
f29e7ac5	377	# if the size parameter is missing use device size
17dd04ca	378	#if [ -n "$NEWSIZE" -a $NEWSIZE <
50c41b09	379	test -z "$NEWSIZE" && NEWSIZE=${DEVSIZE}b
33048414	380	IFS=$NL
f29e7ac5	381	case "$FSTYPE" in
cd96532e	382	"ext3"\|"ext2"\|"ext4") resize_ext $NEWSIZE ;;
f29e7ac5 AK	383	"reiserfs") resize_reiser $NEWSIZE ;;
	384	"xfs") resize_xfs $NEWSIZE ;;
	385	*) error "Filesystem \"$FSTYPE\" on device \"$VOLUME\" is not supported by this tool" ;;
	386	esac \|\| error "Resize $FSTYPE failed"
17dd04ca	387	cleanup 0
f29e7ac5 AK	388	}
f29e7ac5 AK	389
a9d6333b ZK	390	####################################
	391	# Calclulate diff between two dates
	392	# LANG=C input is expected the
	393	# only one supported
	394	####################################
	395	diff_dates() {
8f8c5580	396	echo $(( $("$DATE" -u -d"$1" +%s 2>"$NULL") - $("$DATE" -u -d"$2" +%s 2>"$NULL") ))
a9d6333b ZK	397	}
a9d6333b ZK	398
f29e7ac5 AK	399	###################
	400	# Check filesystem
	401	###################
	402	check() {
	403	detect_fs "$1"
4886fa21 ZK	404	if detect_mounted ; then
	405	verbose "Skipping filesystem check for device \"$VOLUME\" as the filesystem is mounted on $MOUNTED";
	406	cleanup 3
	407	fi
a9d6333b ZK	408
	409	case "$FSTYPE" in
	410	"ext2"\|"ext3"\|"ext4")
	411	IFS_CHECK=$IFS
	412	IFS=$NL
d2010960	413	for i in $(LANG=C "$TUNE_EXT" -l "$VOLUME"); do
a9d6333b ZK	414	case "$i" in
	415	"Last mount") LASTMOUNT=${i##: } ;;
	416	"Last checked") LASTCHECKED=${i##: } ;;
	417	esac
	418	done
	419	case "$LASTMOUNT" in
	420	*"n/a") ;; # nothing to do - system was not mounted yet
	421	*)
	422	LASTDIFF=$(diff_dates $LASTMOUNT $LASTCHECKED)
	423	if test "$LASTDIFF" -gt 0 ; then
	424	verbose "Filesystem has not been checked after the last mount, using fsck -f"
	425	FORCE="-f"
	426	fi
	427	;;
	428	esac
	429	IFS=$IFS_CHECK
	430	esac
	431
f29e7ac5	432	case "$FSTYPE" in
d2010960	433	"xfs") dry "$XFS_CHECK" "$VOLUME" ;;
bd79af9f ZK	434	*) # check if executed from interactive shell environment
bd79af9f ZK	435	case "$-" in
d2010960 ZK	436	i) dry "$FSCK" $YES $FORCE "$VOLUME" ;;
d2010960 ZK	437	*) dry "$FSCK" $FORCE -p "$VOLUME" ;;
bd79af9f	438	esac
f29e7ac5 AK	439	esac
	440	}
	441
	442	#############################
	443	# start point of this script
	444	# - parsing parameters
	445	#############################
4886fa21	446	trap "cleanup 2" 2
50c41b09	447
17dd04ca ZK	448	# test if we are not invoked recursively
	449	test -n "$FSADM_RUNNING" && exit 0
	450
50c41b09 ZK	451	# test some prerequisities
	452	test -n "$TUNE_EXT" -a -n "$RESIZE_EXT" -a -n "$TUNE_REISER" -a -n "$RESIZE_REISER" \
	453	-a -n "$TUNE_XFS" -a -n "$RESIZE_XFS" -a -n "$MOUNT" -a -n "$UMOUNT" -a -n "$MKDIR" \
	454	-a -n "$RMDIR" -a -n "$BLOCKDEV" -a -n "$BLKID" -a -n "$GREP" -a -n "$READLINK" \
dd96ceda	455	-a -n "$DATE" -a -n "$FSCK" -a -n "$XFS_CHECK" -a -n "$LVM" \
17dd04ca	456	\|\| error "Required command definitions in the script are missing!"
9ad2ba2a	457
8f8c5580 ZK	458	"$LVM" version >"$NULL" 2>&1 \|\| error "Could not run lvm binary \"$LVM\""
8f8c5580 ZK	459	$("$READLINK" -e / >"$NULL" 2>&1) \|\| READLINK_E="-f"
50c41b09	460	TEST64BIT=$(( 1000 * 1000000000000 ))
d2010960	461	test "$TEST64BIT" -eq 1000000000000000 \|\| error "Shell does not handle 64bit arithmetic"
8f8c5580	462	$(echo Y \| "$GREP" Y >"$NULL") \|\| error "Grep does not work properly"
d2010960	463	test $("$DATE" -u -d"Jan 01 00:00:01 1970" +%s) -eq 1 \|\| error "Date translation does not work"
50c41b09 ZK	464
50c41b09 ZK	465
c8669f6b	466	if [ "$#" -eq 0 ] ; then
f29e7ac5 AK	467	tool_usage
	468	fi
	469
c8669f6b	470	while [ "$#" -ne 0 ]
f29e7ac5	471	do
c8669f6b ZK	472	case "$1" in
	473	"") ;;
	474	"-h"\|"--help") tool_usage ;;
	475	"-v"\|"--verbose") VERB="-v" ;;
	476	"-n"\|"--dry-run") DRY=1 ;;
	477	"-f"\|"--force") FORCE="-f" ;;
	478	"-e"\|"--ext-offline") EXTOFF=1 ;;
	479	"-y"\|"--yes") YES="-y" ;;
	480	"-l"\|"--lvresize") DO_LVRESIZE=1 ;;
	481	"check") CHECK="$2" ; shift ;;
	482	"resize") RESIZE="$2"; NEWSIZE="$3" ; shift 2 ;;
	483	*) error "Wrong argument \"$1\". (see: $TOOL --help)"
f29e7ac5 AK	484	esac
	485	shift
	486	done
	487
a9382908 ZK	488	test "$YES" = "-y" \|\| YES=
	489	test "$EXTOFF" -eq 1 \|\| EXTOFF=0
	490
f29e7ac5 AK	491	if [ -n "$CHECK" ]; then
	492	check "$CHECK"
	493	elif [ -n "$RESIZE" ]; then
17dd04ca	494	export FSADM_RUNNING="fsadm"
f29e7ac5 AK	495	resize "$RESIZE" "$NEWSIZE"
	496	else
	497	error "Missing command. (see: $TOOL --help)"
	498	fi