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#!/bin/sh
#
# This script umounts mounted iSCSI devices on shutdown, if possible.
# It is supposed to catch most use cases but is not designed to work
# for every corner-case. It handles LVM and multipath, but only if
# one of the following stackings is used:
# LVM -> multipath -> iSCSI
# multipath -> iSCSI
# LVM -> iSCSI
# LVM -> LUKS -> multipath -> iSCSI
# LVM -> LUKS -> iSCSI
# LUKS -> LVM -> multipath -> iSCSI
# LUKS -> multipath -> iSCSI
# LUKS -> LVM -> iSCSI
# LUKS -> iSCSI
# It does not try to umount anything belonging to any device that is
# also used as a backing store for the root filesystem. Any iSCSI
# device part of the backing store of the root filesystem will be noted
# in /run/open-iscsi/shutdown-keep-sessions, so that the session not be
# closed on shutdown.
#
# KNOWN ISSUES:
# - It doesn't handle submounts properly in all corner cases.
# Specifically, it doesn't handle a non-iSCSI mount below an
# iSCSI mount if it isn't also marked _netdev in /etc/fstab.
# - It does not handle other things device mapper can do, such as
# RAID, crypto, manual mappings of parts of disks, etc.
# - It doesn't try to kill programs still accessing those mounts,
# umount will just fail then.
# - It doesn't handle more complicated stackings such as overlayfs,
# FUSE filesystems, loop devices, etc.
# - It doesn't handle swap.
#
# LONG TERM GOAL:
# - In the long term, there should be a solution where for each part
# of the stacking (device mapper, LVM, overlayfs, etc.) explicit
# depdendencies are declared with the init system such that it can
# be automatically dismantled. That would make this script
# superfluous and also not be a layering violation, as it
# currently is.
#
# CODING CHOICES:
# - On systems running sysvinit, this script might be called without
# /usr being mounted, so a lot of very useful commands are not
# available: head, tail, stat, awk, etc. This makes the script
# quite ugly at places, but that can't be avoided.
#
# Author: Christian Seiler <christian@iwakd.de>
#
# Make sure we don't include /usr in our path, else future modifications
# to this script might accidentally use something from there and cause
# failure on separate-/usr sysvinit systems that isn't immediately
# noticed.
PATH=/sbin:/bin
EXCLUDE_MOUNTS_AT_SHUTDOWN=""
if [ -f /etc/default/open-iscsi ]; then
. /etc/default/open-iscsi
fi
MULTIPATH=/sbin/multipath
PVS=/sbin/pvs
LVS=/sbin/lvs
VGS=/sbin/vgs
VGCHANGE=/sbin/vgchange
CRYPTSETUP=/sbin/cryptsetup
DMSETUP=/sbin/dmsetup
if [ -x $PVS ] && [ -x $LVS ] && [ -x $VGCHANGE ] ; then
HAVE_LVM=1
else
HAVE_LVM=0
fi
if [ -x $CRYPTSETUP ] && [ -x $DMSETUP ] ; then
HAVE_LUKS=1
else
HAVE_LUKS=0
fi
DRY_RUN=0
# We need to make sure that we don't try to umount the root device
# and for systemd systems, also /usr (which is pre-mounted in initrd
# there).
EXCLUDE_MOUNTS="/"
if [ -d /run/systemd/system ] ; then
EXCLUDE_MOUNTS="$EXCLUDE_MOUNTS /usr"
fi
EXCLUDE_MOUNTS="${EXCLUDE_MOUNTS}${EXCLUDE_MOUNTS_AT_SHUTDOWN+ $EXCLUDE_MOUNTS_AT_SHUTDOWN}"
unset _EXCLUDE_MOUNTS
error_usage() {
echo "Usage: $0 [--dry-run | --timeout secs]" >&2
exit 1
}
timeout=0
if [ $# -gt 2 ] ; then
error_usage
fi
if [ $# -eq 2 ] ; then
if [ x"$1"x != x"--timeout"x ] ; then
error_usage
fi
case "$2" in
(-1) timeout="$2" ;;
(*[!0-9]*|"") error_usage ;;
(*) timeout="$2" ;;
esac
elif [ $# -eq 1 ] ; then
if [ x"$1"x != x"--dry-run"x ] ; then
error_usage
fi
DRY_RUN=1
fi
# poor man's hash implementation using shell variables
hash_keys() {
_hash_keys_hash_key_prefix="${1}_"
(
IFS='='
set | while read var value ; do
if [ x"${var#$_hash_keys_hash_key_prefix}"x != x"${var}"x ] ; then
printf '%s\n' "${var#$_hash_keys_hash_key_prefix}"
fi
done
)
}
hash_clear() {
for k in $(hash_keys "$1") ; do
unset "${1}_${k}"
done
}
hash_get() {
_hash_get_var="$2_$(printf '%s' "$3" | sed 's%[^A-Za-z0-9_]%_%g')"
eval _hash_get_value=\$${_hash_get_var}
eval $1=\${_hash_get_value}
}
hash_set() {
_hash_set_var="$1_$(printf '%s' "$2" | sed 's%[^A-Za-z0-9_]%_%g')"
eval ${_hash_set_var}=\${3}
}
hash_unset() {
_hash_set_var="$1_$(printf '%s' "$2" | sed 's%[^A-Za-z0-9_]%_%g')"
unset ${_hash_set_var}
}
in_set() {
eval _set=\$$1
case "${_set}" in
("$2"|*" $2"|"$2 "*|*" $2 "*) return 0 ;;
(*) return 1 ;;
esac
}
_add_to_set() {
eval _set=\$$1
case "${_set}" in
("$2"|*" $2"|"$2 "*|*" $2 "*) ;;
("") _set="$2" ;;
(*) _set="${_set} $2" ;;
esac
eval $1=\${_set}
}
add_to_set() {
_add_to_set_set="$1"
shift
for _add_to_set_val in "$@" ; do
_add_to_set "${_add_to_set_set}" "${_add_to_set_val}"
done
}
hash_add_to_set() {
_hash_add_to_set_var="$1_$(printf '%s' "$2" | sed 's%[^A-Za-z0-9_]%_%g')"
shift
shift
add_to_set "${_hash_add_to_set_var}" "$@"
}
device_majmin() {
eval $1=\"\"
_majmin_dec=$(LC_ALL=C ls -lnd /dev/"$2" | while read _perms _links _uid _gid _majcomma _min _rest ; do
if [ x"${_majcomma%,}"x != x"${_majcomma}"x ] ; then
printf '%s' ${_majcomma%,}:${_min}
fi
break
done)
[ -n "${_majmin_dec}" ] || return
eval $1=\${_majmin_dec}
}
get_lvm_vgs() {
# handle the case where we didn't get passed any PVs
# at all
[ $# -gt 0 ] || return 0
# subshell for pwd change
(
cd /dev
$PVS --noheadings -o vg_name "$@" 2>/dev/null
)
}
enumerate_luks() {
hash_clear LUKS_DEVICES_REVERSE_MAP
_all_crypt_devices=$($DMSETUP info --noheadings -o name -c -S subsystem=CRYPT 2>/dev/null || :)
for _crypt_device in ${_all_crypt_devices} ; do
[ -b "/dev/mapper/${_crypt_device}" ] || continue
_crypt_device="$(readlink -fe "/dev/mapper/${_crypt_device}" 2>/dev/null || :)"
_crypt_device="${_crypt_device#/dev/}"
[ -b "/dev/${_crypt_device}" ] || continue
# dmsetup deps is weird, it outputs the following:
# 1 dependencies : (XYZ)
_dep=$($DMSETUP deps -o blkdevname "/dev/${_crypt_device}" | sed -n '1s%.*: (\(.*\)).*%\1%p')
if [ -n "$_dep" ] && [ -b "/dev/${_dep}" ] ; then
_dep="$(readlink -fe "/dev/$_dep" 2>/dev/null || :)"
_dep="${_dep#/dev/}"
fi
if [ -n "$_dep" ] && [ -b "/dev/${_dep}" ] ; then
hash_set LUKS_DEVICES_REVERSE_MAP "${_dep}" "${_crypt_device}"
fi
done
}
enumerate_iscsi_devices() {
# Empty arrays
iscsi_disks=""
iscsi_partitions=""
iscsi_multipath_disks=""
iscsi_multipath_disk_aliases=""
iscsi_multipath_partitions=""
iscsi_lvm_vgs=""
iscsi_lvm_lvs=""
iscsi_potential_mount_sources=""
iscsi_luks_pass1=""
iscsi_luks_pass2=""
hash_clear ISCSI_DEVICE_SESSIONS
hash_clear ISCSI_MPALIAS_SESSIONS
hash_clear ISCSI_LVMVG_SESSIONS
hash_clear ISCSI_NUMDEVICE_SESSIONS
ISCSI_EXCLUDED_SESSIONS=""
# We first need to generate a global reverse mapping of all
# cryptsetup (e.g. LUKS) devices, because there's no easy way
# to query "is this the encrypted backing of an active crypto
# mapping?
enumerate_luks
# Look for all iscsi disks
for _host_dir in /sys/devices/platform/host* /sys/devices/pci*/*/*/host* ; do
if ! [ -d "$_host_dir"/iscsi_host* ] || ! [ -d "$_host_dir"/iscsi_host/host* ] ; then
continue
fi
for _session_dir in "$_host_dir"/session* ; do
[ -d "$_session_dir"/target* ] || continue
for _block_dev_dir in "$_session_dir"/target*/*\:*/block/* ; do
_block_dev=${_block_dev_dir##*/}
[ x"${_block_dev}"x != x"*"x ] || continue
add_to_set iscsi_disks "${_block_dev}"
hash_add_to_set ISCSI_DEVICE_SESSIONS "${_block_dev}" ${_session_dir}
done
done
done
# Look for all partitions on those disks
for _disk in $iscsi_disks ; do
hash_get _disk_sessions ISCSI_DEVICE_SESSIONS "${_disk}"
for _part_dir in /sys/class/block/"${_disk}"/"${_disk}"?* ; do
_part="${_part_dir##*/}"
[ x"${_part}"x != x"${_disk}?*"x ] || continue
add_to_set iscsi_partitions "${_part}"
hash_set ISCSI_DEVICE_SESSIONS "${_part}" "${_disk_sessions}"
done
done
if [ -x $MULTIPATH ] ; then
# Look for all multipath disks
for _disk in $iscsi_disks ; do
hash_get _disk_sessions ISCSI_DEVICE_SESSIONS "${_disk}"
for _alias in $($MULTIPATH -v1 -l /dev/"$_disk") ; do
_mp_dev="$(readlink -fe "/dev/mapper/${_alias}" || :)"
[ -n "${_mp_dev}" ] || continue
add_to_set iscsi_multipath_disks "${_mp_dev#/dev/}"
add_to_set iscsi_multipath_disk_aliases "${_alias}"
hash_add_to_set ISCSI_DEVICE_SESSIONS "${_mp_dev#/dev/}" ${_disk_sessions}
hash_add_to_set ISCSI_MPALIAS_SESSIONS "${_alias}" ${_disk_sessions}
done
done
# Look for partitions on these multipath disks
for _alias in $iscsi_multipath_disk_aliases ; do
hash_get _mp_sessions ISCSI_MPALIAS_SESSIONS "${_alias}"
for _part_name in /dev/mapper/"${_alias}"-part* ; do
_part="$(readlink -fe "$_part_name" 2>/dev/null || :)"
[ -n "${_part}" ] || continue
add_to_set iscsi_multipath_partitions "${_part#/dev/}"
hash_set ISCSI_DEVICE_SESSIONS "${_part#/dev/}" "${_mp_sessions}"
done
done
fi
if [ $HAVE_LUKS -eq 1 ] ; then
# Look for all LUKS devices.
for _dev in $iscsi_disks $iscsi_partitions $iscsi_multipath_disks $iscsi_multipath_partitions ; do
hash_get _luksDev LUKS_DEVICES_REVERSE_MAP "${_dev}"
[ -n "${_luksDev}" ] || continue
add_to_set iscsi_luks_pass1 "${_luksDev}"
hash_get _currentSession ISCSI_DEVICE_SESSIONS "${_dev}"
if [ -n "${_currentSession}" ] ; then
hash_set ISCSI_DEVICE_SESSIONS "${_luksDev}" "${_currentSession}"
fi
done
fi
if [ $HAVE_LVM -eq 1 ] ; then
# Look for all LVM volume groups that have a backing store
# on any iSCSI device we found. Also, add $LVMGROUPS set in
# /etc/default/open-iscsi (for more complicated stacking
# configurations we don't automatically detect).
for _vg in $(get_lvm_vgs $iscsi_disks $iscsi_partitions $iscsi_multipath_disks $iscsi_multipath_partitions $iscsi_luks_pass1) $LVMGROUPS ; do
add_to_set iscsi_lvm_vgs "$_vg"
done
# $iscsi_lvm_vgs is now unique list
for _vg in $iscsi_lvm_vgs ; do
# get PVs to track iSCSI sessions
for _pv in $($VGS --noheadings -o pv_name "$_vg" 2>/dev/null) ; do
_pv_dev="$(readlink -fe "$_pv" 2>/dev/null || :)"
[ -n "${_pv_dev}" ] || continue
hash_get _pv_sessions ISCSI_DEVICE_SESSIONS "${_pv_dev#/dev/}"
hash_add_to_set ISCSI_LVMVG_SESSIONS "${_vg}" ${_pv_sessions}
done
# now we collected all sessions belonging to this VG
hash_get _vg_sessions ISCSI_LVMVG_SESSIONS "${_vg}"
# find all LVs
for _lv in $($VGS --noheadings -o lv_name "$_vg" 2>/dev/null) ; do
_dev="$(readlink -fe "/dev/${_vg}/${_lv}" 2>/dev/null || :)"
[ -n "${_dev}" ] || continue
iscsi_lvm_lvs="$iscsi_lvm_lvs ${_dev#/dev/}"
hash_set ISCSI_DEVICE_SESSIONS "${_dev#/dev/}" "${_vg_sessions}"
done
done
fi
if [ $HAVE_LUKS -eq 1 ] ; then
# Look for all LUKS devices.
for _dev in $iscsi_lvm_lvs ; do
hash_get _luksDev LUKS_DEVICES_REVERSE_MAP "${_dev}"
[ -n "${_luksDev}" ] || continue
add_to_set iscsi_luks_pass2 "${_luksDev}"
hash_get _currentSession ISCSI_DEVICE_SESSIONS "${_dev}"
if [ -n "${_currentSession}" ] ; then
hash_set ISCSI_DEVICE_SESSIONS "${_luksDev}" "${_currentSession}"
fi
done
fi
# Gather together all mount sources
iscsi_potential_mount_sources="$iscsi_potential_mount_sources $iscsi_disks $iscsi_partitions"
iscsi_potential_mount_sources="$iscsi_potential_mount_sources $iscsi_multipath_disks $iscsi_multipath_partitions"
iscsi_potential_mount_sources="$iscsi_potential_mount_sources $iscsi_lvm_lvs"
iscsi_potential_mount_sources="$iscsi_potential_mount_sources $iscsi_luks_pass1 $iscsi_luks_pass2"
# Convert them to numerical representation
iscsi_potential_mount_sources_majmin=""
for _src in $iscsi_potential_mount_sources ; do
device_majmin _src_majmin "$_src"
[ -n "$_src_majmin" ] || continue
iscsi_potential_mount_sources_majmin="${iscsi_potential_mount_sources_majmin} ${_src_majmin}"
hash_get _dev_sessions ISCSI_DEVICE_SESSIONS "${_src}"
hash_set ISCSI_NUMDEVICE_SESSIONS "${_src_majmin}" "${_dev_sessions}"
done
# Enumerate mount points
iscsi_mount_points=""
iscsi_mount_point_ids=""
while read _mpid _mppid _mpdev _mpdevpath _mppath _mpopts _other ; do
if in_set iscsi_potential_mount_sources_majmin "$_mpdev" ; then
if in_set EXCLUDE_MOUNTS "${_mppath}" ; then
hash_get _dev_sessions ISCSI_NUMDEVICE_SESSIONS "${_mpdev}"
add_to_set ISCSI_EXCLUDED_SESSIONS $_dev_sessions
continue
fi
# list mountpoints in reverse order (in case
# some are stacked) mount --move may cause the
# order of /proc/self/mountinfo to not always
# reflect the stacking order, so this is not
# fool-proof, but it's better than nothing
iscsi_mount_points="$_mppath $iscsi_mount_points"
iscsi_mount_point_ids="$_mpid $iscsi_mount_points"
fi
done < /proc/self/mountinfo
}
try_umount() {
# in order to handle stacking try twice; together with the fact
# that the list of mount points is in reverse order of the
# contents /proc/self/mountinfo this should catch most cases
for retry in 1 2 ; do
for path in $iscsi_mount_points ; do
# first try to see if it really is a mountpoint
# still (might be the second round this is done
# and the mount is already gone, or something
# else umounted it first)
if ! fstab-decode mountpoint -q "$path" ; then
continue
fi
# try to umount it
if ! fstab-decode umount "$path" ; then
# unfortunately, umount's exit code
# may be a false negative, i.e. it
# might give a failure exit code, even
# though it succeeded, so check again
if fstab-decode mountpoint -q "$path" ; then
echo "Could not unmount $path" >&2
any_umount_failed=1
fi
fi
done
done
}
try_deactivate_lvm() {
[ $HAVE_LVM -eq 1 ] || return
for vg in $iscsi_lvm_vgs ; do
vg_excluded=0
hash_get vg_sessions ISCSI_LVMVG_SESSIONS "$vg"
for vg_session in $vg_sessions ; do
if in_set ISCSI_EXCLUDED_SESSIONS "$vg_session" ; then
vg_excluded=1
fi
done
if [ $vg_excluded -eq 1 ] ; then
# volume group on same iSCSI session as excluded
# mount, don't disable it
# (FIXME: we should only exclude VGs that contain
# those mounts, not also those that happen to be
# in the same iSCSI session)
continue
fi
if ! $VGCHANGE --available=n $vg ; then
# Make sure the volume group (still) exists. If
# it doesn't we count that as deactivated, so
# don't fail then.
_vg_test=$(vgs -o vg_name --noheadings $vg 2>/dev/null || :)
if [ -n "${_vg_test}" ] ; then
echo "Cannot deactivate Volume Group $vg" >&2
any_umount_failed=1
fi
fi
done
}
try_dismantle_multipath() {
[ -x $MULTIPATH ] || return
for mpalias in $iscsi_multipath_disk_aliases ; do
mp_excluded=0
hash_get mp_sessions ISCSI_MPALIAS_SESSIONS "$mpalias"
for mp_session in $mp_sessions ; do
if in_set ISCSI_EXCLUDED_SESSIONS "$mp_session" ; then
mp_excluded=1
fi
done
if [ $mp_excluded -eq 1 ] ; then
# multipath device on same iSCSI session as
# excluded mount, don't disable it
# (FIXME: we should only exclude multipath mounts
# that contain those mounts, not also those that
# happen to be in the same iSCSI session)
continue
fi
if ! $MULTIPATH -f $mpalias ; then
echo "Cannot dismantle Multipath Device $mpalias" >&2
any_umount_failed=1
fi
done
}
try_dismantle_luks() {
[ $HAVE_LUKS -eq 1 ] || return
case "$1" in
1) iscsi_luks_current_pass="$iscsi_luks_pass1" ;;
2|*) iscsi_luks_current_pass="$iscsi_luks_pass2" ;;
esac
for luksDev in $iscsi_luks_current_pass ; do
luks_excluded=0
hash_get device_sessions ISCSI_DEVICE_SESSIONS "$luksDev"
for device_session in $device_sessions ; do
if in_set ISCSI_EXCLUDED_SESSIONS "$device_session" ; then
luks_excluded=1
fi
done
if [ $luks_excluded -eq 1 ] ; then
continue
fi
_luksName="$($DMSETUP info -c --noheadings -o name /dev/"$luksDev" 2>/dev/null || :)"
[ -n "${_luksName}" ] || continue
if ! $CRYPTSETUP close "${_luksName}" ; then
echo "Cannot dismantle cryptsetup device ${_luksName}" >&2
any_umount_failed=1
fi
done
}
# Don't do this if we are using systemd as init system, since systemd
# takes care of network filesystems (including those marked _netdev) by
# itself.
if ! [ -d /run/systemd/system ] && [ $HANDLE_NETDEV -eq 1 ] && [ $DRY_RUN -eq 0 ]; then
echo "Unmounting all devices marked _netdev";
umount -a -O _netdev >/dev/null 2>&1
fi
enumerate_iscsi_devices
# Dry run? Just print what we want to do (useful for administrator to check).
if [ $DRY_RUN -eq 1 ] ; then
echo "$0: would umount the following mount points:"
had_mount=0
if [ -n "$iscsi_mount_points" ] ; then
for v in $iscsi_mount_points ; do
echo " $v"
had_mount=1
done
fi
[ $had_mount -eq 1 ] || echo " (none)"
echo "$0: would disable the following LUKS devices (second pass):"
had_luks=0
if [ -n "$iscsi_luks_pass2" ] ; then
for v in ${iscsi_luks_pass2} ; do
luks_excluded=0
hash_get device_sessions ISCSI_DEVICE_SESSIONS "$v"
for device_session in $device_sessions ; do
if in_set ISCSI_EXCLUDED_SESSIONS "$device_session" ; then
luks_excluded=1
fi
done
if [ $luks_excluded -eq 1 ] ; then
continue
fi
_luksName="$($DMSETUP info -c --noheadings -o name /dev/"$v" 2>/dev/null || :)"
[ -n "${_luksName}" ] || continue
echo " ${_luksName}"
had_luks=1
done
fi
[ $had_luks -eq 1 ] || echo " (none)"
echo "$0: would deactivate the following LVM Volume Groups:"
had_vg=0
if [ -n "$iscsi_lvm_vgs" ] ; then
for v in $iscsi_lvm_vgs ; do
# sync this exclusion logic with try_deactivate_lvm
vg_excluded=0
hash_get vg_sessions ISCSI_LVMVG_SESSIONS "$v"
for vg_session in $vg_sessions ; do
if in_set ISCSI_EXCLUDED_SESSIONS "$vg_session" ; then
vg_excluded=1
fi
done
if [ $vg_excluded -eq 1 ] ; then
continue
fi
echo " $v"
had_vg=1
done
fi
[ $had_vg -eq 1 ] || echo " (none)"
echo "$0: would disable the following LUKS devices (first pass):"
had_luks=0
if [ -n "$iscsi_luks_pass1" ] ; then
for v in ${iscsi_luks_pass1} ; do
luks_excluded=0
hash_get device_sessions ISCSI_DEVICE_SESSIONS "$v"
for device_session in $device_sessions ; do
if in_set ISCSI_EXCLUDED_SESSIONS "$device_session" ; then
luks_excluded=1
fi
done
if [ $luks_excluded -eq 1 ] ; then
continue
fi
_luksName="$($DMSETUP info -c --noheadings -o name /dev/"$v" 2>/dev/null || :)"
[ -n "${_luksName}" ] || continue
echo " ${_luksName}"
had_luks=1
done
fi
[ $had_luks -eq 1 ] || echo " (none)"
echo "$0: would deactivate the following multipath volumes:"
had_mp=0
if [ -n "$iscsi_multipath_disk_aliases" ] ; then
for v in $iscsi_multipath_disk_aliases ; do
# sync this exclusion logic with try_dismantle_multipath
mp_excluded=0
hash_get mp_sessions ISCSI_MPALIAS_SESSIONS "$v"
for mp_session in $mp_sessions ; do
if in_set ISCSI_EXCLUDED_SESSIONS "$mp_session" ; then
mp_excluded=1
fi
done
if [ $mp_excluded -eq 1 ] ; then
continue
fi
echo " $v"
had_mp=1
done
fi
[ $had_mp -eq 1 ] || echo " (none)"
if [ -n "$ISCSI_EXCLUDED_SESSIONS" ] ; then
echo "$0: the following sessions are excluded from disconnection (because / or another excluded mount is on them):"
for v in $ISCSI_EXCLUDED_SESSIONS ; do
echo " $v"
done
fi
exit 0
fi
# after our first enumeration, write out a list of sessions that
# shouldn't be terminated because excluded mounts are on those
# sessions
if [ -n "$ISCSI_EXCLUDED_SESSIONS" ] ; then
mkdir -p -m 0700 /run/open-iscsi
for session in $ISCSI_EXCLUDED_SESSIONS ; do
printf '%s\n' $session
done > /run/open-iscsi/shutdown-keep-sessions
else
# make sure there's no leftover from a previous call
rm -f /run/open-iscsi/shutdown-keep-sessions
fi
any_umount_failed=0
try_umount
try_dismantle_luks 2
try_deactivate_lvm
try_dismantle_luks 1
try_dismantle_multipath
while [ $any_umount_failed -ne 0 ] && ( [ $timeout -gt 0 ] || [ $timeout -eq -1 ] ) ; do
# wait a bit, perhaps there was still a program that
# was terminating
sleep 1
# try again and decrease timeout
enumerate_iscsi_devices
any_umount_failed=0
try_umount
try_dismantle_luks 2
try_deactivate_lvm
try_dismantle_luks 1
try_dismantle_multipath
if [ $timeout -gt 0 ] ; then
timeout=$((timeout - 1))
fi
done
# Create signaling file (might be useful)
if [ $any_umount_failed -eq 1 ] ; then
touch /run/open-iscsi/some_umount_failed
else
rm -f /run/open-iscsi/some_umount_failed
fi
exit $any_umount_failed
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