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mirror of git://sourceware.org/git/lvm2.git synced 2024-12-29 15:22:30 +03:00
lvm2/scripts/fsadm.sh
David Teigland 264827cb98 lvresize: add new options and defaults for fs handling
The new option "--fs String" for lvresize/lvreduce/lvextend
controls the handling of file systems before/after resizing
the LV.  --resizefs is the same as --fs resize.

The new option "--fsmode String" can be used to control
mounting and unmounting of the fs during resizing.

Possible --fs values:

checksize
  Only applies to reducing size; does nothing for extend.
  Check the fs size and reduce the LV if the fs is not using
  the affected space, i.e. the fs does not need to be shrunk.
  Fail the command without reducing the fs or LV if the fs is
  using the affected space.

resize
  Resize the fs using the fs-specific resize command.
  This may include mounting, unmounting, or running fsck.
  See --fsmode to control mounting behavior, and --nofsck to
  disable fsck.

resize_fsadm
  Use the old method of calling fsadm to handle the fs
  (deprecated.) Warning: this option does not prevent lvreduce
  from destroying file systems that are unmounted (or mounted
  if prompts are skipped.)

ignore
  Resize the LV without checking for or handling a file system.
  Warning: using ignore when reducing the LV size may destroy the
  file system.

Possible --fsmode values:

manage
  Mount or unmount the fs as needed to resize the fs,
  and attempt to restore the original mount state at the end.

nochange
  Do not mount or unmount the fs. If mounting or unmounting
  is required to resize the fs, then do not resize the fs or
  the LV and fail the command.

offline
  Unmount the fs if it is mounted, and resize the fs while it
  is unmounted. If mounting is required to resize the fs,
  then do not resize the fs or the LV and fail the command.

Notes on lvreduce:

When no --fs or --resizefs option is specified:
. lvextend default behavior is fs ignore.
. lvreduce default behavior is fs checksize
  (includes activating the LV.)

With the exception of --fs resize_fsadm|ignore, lvreduce requires
the recent libblkid fields FSLASTBLOCK and FSBLOCKSIZE.
FSLASTBLOCK*FSBLOCKSIZE is the last byte used by the fs on the LV,
which determines if reducing the fs is necessary.
2022-09-13 15:15:05 -05:00

837 lines
24 KiB
Bash
Executable File

#!/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 $YES --fs resize_fsadm -L"${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 "$VOLUME" || true)
test -n "$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 -z "$DEVSIZE" ; then
DEVSIZE=$("$BLOCKDEV" --getsize "$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