mirror of
git://sourceware.org/git/lvm2.git
synced 2024-12-21 13:34:40 +03:00
314 lines
9.1 KiB
Bash
314 lines
9.1 KiB
Bash
#!/bin/bash
|
|
#
|
|
# Copyright (C) 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: Peter Rajnoha <prajnoha at redhat.com>
|
|
#
|
|
# Script for deactivating block devices
|
|
#
|
|
# Requires:
|
|
# bash >= 4.0 (associative array support)
|
|
# lsblk >= 2.22 (lsblk -s support)
|
|
# umount
|
|
# dmsetup >= 1.02.68 (--retry option support)
|
|
# lvm >= 2.2.89 (activation/retry_deactivation config support)
|
|
#
|
|
|
|
#set -x
|
|
shopt -s dotglob nullglob
|
|
|
|
TOOL=blkdeactivate
|
|
|
|
DEV_DIR='/dev'
|
|
SYS_BLK_DIR='/sys/block'
|
|
|
|
UMOUNT="/bin/umount"
|
|
DMSETUP="@sbindir@/dmsetup"
|
|
LVM="@sbindir@/lvm"
|
|
|
|
LSBLK="/bin/lsblk -r --noheadings -o TYPE,KNAME,NAME,MOUNTPOINT"
|
|
LSBLK_VARS="local devtype local kname local name local mnt"
|
|
LSBLK_READ="read -r devtype kname name mnt"
|
|
|
|
# Do not unmount mounted devices by default.
|
|
DO_UMOUNT=0
|
|
|
|
# Deactivate each LV separately by default (not the whole VG).
|
|
LVM_DO_WHOLE_VG=0
|
|
# Do not retry LV deactivation by default.
|
|
LVM_CONFIG="activation{retry_deactivation=0}"
|
|
|
|
#
|
|
# List of device names and/or VGs to be skipped.
|
|
# Device name is the KNAME from lsblk output.
|
|
#
|
|
# If deactivation of any device fails, it's automatically
|
|
# added to the SKIP_DEVICE_LIST (also a particular VG
|
|
# added to the SKIP_VG_LIST for a device that is an LV).
|
|
#
|
|
# These lists provide device tree pruning to skip
|
|
# particular device/VG deactivation that failed already.
|
|
# (lists are associative arrays!)
|
|
#
|
|
declare -A SKIP_DEVICE_LIST=()
|
|
declare -A SKIP_VG_LIST=()
|
|
|
|
#
|
|
# List of mountpoints to be skipped. Any device that is mounted on the mountpoint
|
|
# listed here will be added to SKIP_DEVICE_LIST (and SKIP_VG_LIST) automatically.
|
|
# (list is an associative array!)
|
|
#
|
|
declare -A SKIP_UMOUNT_LIST=(["/"]=1 ["/boot"]=1 \
|
|
["/lib"]=1 ["/lib64"]=1 \
|
|
["/bin"]=1 ["/sbin"]=1 \
|
|
["/usr"]=1 \
|
|
["/usr/lib"]=1 ["/usr/lib64"]=1 \
|
|
["/usr/sbin"]=1 ["/usr/bin"]=1)
|
|
# Bash can't properly handle '[' and ']' used as a subscript
|
|
# within the '()'initialization - it needs to be done separately!
|
|
SKIP_UMOUNT_LIST["[SWAP]"]=1
|
|
|
|
usage() {
|
|
echo "${TOOL}: Utility to deactivate block devices"
|
|
echo
|
|
echo " ${TOOL} [options] [device...]"
|
|
echo " - Deactivate block device tree."
|
|
echo " If devices are specified, deactivate only supplied devices and their holders."
|
|
echo
|
|
echo " Options:"
|
|
echo " -h | --help Show this help message"
|
|
echo " -d | --dmoption DM_OPTIONS Comma separated DM specific options"
|
|
echo " -l | --lvmoption LVM_OPTIONS Comma separated LVM specific options"
|
|
echo " -u | --umount Unmount the device if mounted"
|
|
echo
|
|
echo " Device specific options:"
|
|
echo " DM_OPTIONS:"
|
|
echo " retry retry removal several times in case of failure"
|
|
echo " force force device removal"
|
|
echo " LVM_OPTIONS:"
|
|
echo " retry retry removal several times in case of failure"
|
|
echo " wholevg deactivate the whole VG when processing an LV"
|
|
|
|
exit
|
|
}
|
|
|
|
add_device_to_skip_list() {
|
|
SKIP_DEVICE_LIST+=(["$kname"]=1)
|
|
return 1
|
|
}
|
|
|
|
add_vg_to_skip_list() {
|
|
SKIP_VG_LIST+=(["$DM_VG_NAME"]=1)
|
|
return 1
|
|
}
|
|
|
|
is_top_level_device() {
|
|
# top level devices do not have any holders, that is
|
|
# the SYS_BLK_DIR/<device_name>/holders dir is empty
|
|
files="`echo $SYS_BLK_DIR/$kname/holders/*`"
|
|
test -z "$files"
|
|
}
|
|
|
|
device_umount () {
|
|
test -z "$mnt" && return 0;
|
|
|
|
if test -z "${SKIP_UMOUNT_LIST["$mnt"]}" -a "$DO_UMOUNT" -eq "1"; then
|
|
echo " UMOUNT: unmounting $name ($kname) mounted on $mnt"
|
|
$UMOUNT "$mnt" || add_device_to_skip_list
|
|
else
|
|
echo " [SKIP]: unmount of $name ($kname) mounted on $mnt"
|
|
add_device_to_skip_list
|
|
fi
|
|
}
|
|
|
|
deactivate_holders () {
|
|
local skip=1; $LSBLK_VARS
|
|
|
|
# Get holders for the device - either a mount or another device.
|
|
# First line on the lsblk output is the device itself - skip it for
|
|
# the deactivate call as this device is already being deactivated.
|
|
while $LSBLK_READ; do
|
|
test -e $SYS_BLK_DIR/$kname || continue
|
|
# check if the device not on the skip list already
|
|
test -z ${SKIP_DEVICE_LIST["$kname"]} || return 1
|
|
|
|
# try to unmount it if mounted
|
|
device_umount || return 1
|
|
|
|
# try to deactivate the holder
|
|
test $skip -eq 1 && skip=0 && continue
|
|
deactivate || return 1
|
|
done <<< "`$LSBLK $1`"
|
|
}
|
|
|
|
deactivate_dm () {
|
|
local name=$(printf $name)
|
|
test -b "$DEV_DIR/mapper/$name" || return 0
|
|
test -z ${SKIP_DEVICE_LIST["$kname"]} || return 1
|
|
|
|
deactivate_holders "$DEV_DIR/mapper/$name" || return 1
|
|
|
|
echo " DM: deactivating $devtype device $name ($kname)"
|
|
$DMSETUP $DMSETUP_OPTS remove "$name" || add_device_to_skip_list
|
|
}
|
|
|
|
deactivate_lvm () {
|
|
local DM_VG_NAME; local DM_LV_NAME; local DM_LV_LAYER
|
|
|
|
eval $($DMSETUP splitname --nameprefixes --noheadings --rows "$name" LVM)
|
|
test -b "$DEV_DIR/$DM_VG_NAME/$DM_LV_NAME" || return 0
|
|
test -z ${SKIP_VG_LIST["$DM_VG_NAME"]} || return 1
|
|
|
|
# Deactivating only the LV specified
|
|
test $LVM_DO_WHOLE_VG -eq 0 && {
|
|
deactivate_holders "$DEV_DIR/$DM_VG_NAME/$DM_LV_NAME" || {
|
|
add_device_to_skip_list
|
|
return 1
|
|
}
|
|
|
|
echo " LVM: deactivating Logical Volume $DM_VG_NAME/$DM_LV_NAME"
|
|
$LVM lvchange --config "log{prefix=\"\"} $LVM_CONFIG" -aln $DM_VG_NAME/$DM_LV_NAME || {
|
|
add_device_to_skip_list
|
|
return 1
|
|
}
|
|
return 0
|
|
}
|
|
|
|
# Deactivating the whole VG the LV is part of
|
|
lv_list=$($LVM vgs --config "$LVM_CONFIG" --noheadings --rows -o lv_name $DM_VG_NAME)
|
|
for lv in $lv_list; do
|
|
test -b "$DEV_DIR/$DM_VG_NAME/$lv" || continue
|
|
deactivate_holders "$DEV_DIR/$DM_VG_NAME/$lv" || {
|
|
add_vg_to_skip_list
|
|
return 1
|
|
}
|
|
done
|
|
|
|
echo " LVM: deactivating Volume Group $DM_VG_NAME"
|
|
$LVM vgchange --config "log{prefix=\" \"} $LVM_CONFIG" -aln $DM_VG_NAME || add_vg_to_skip_list
|
|
}
|
|
|
|
deactivate () {
|
|
######################################################################
|
|
# DEACTIVATION HOOKS FOR NEW DEVICE TYPES GO HERE! #
|
|
# #
|
|
# Identify a new device type either by inspecting the TYPE provided #
|
|
# by lsblk directly ($devtype) or by any other mean that is suitable #
|
|
# e.g. the KNAME provided by lsblk ($kname). See $LSBLK_VARS for #
|
|
# complete list of variables that may be used. Then call a #
|
|
# device-specific deactivation function that handles the exact type. #
|
|
# #
|
|
# This device-specific function will certainly need to call #
|
|
# deactivate_holders first to recursively deactivate any existing #
|
|
# holders it might have before deactivating the device it processes. #
|
|
######################################################################
|
|
if test "$devtype" = "lvm"; then
|
|
deactivate_lvm
|
|
elif test "${kname:0:3}" = "dm-"; then
|
|
deactivate_dm
|
|
fi
|
|
}
|
|
|
|
deactivate_all() {
|
|
$LSBLK_VARS
|
|
skip=0
|
|
|
|
echo "Deactivating block devices:"
|
|
|
|
if test $# -eq 0; then
|
|
# Deactivate all devices
|
|
while $LSBLK_READ; do
|
|
# 'disk' is at the bottom already and it's a real device
|
|
test "$devtype" = "disk" && continue
|
|
|
|
# if deactivation of any device fails, skip processing
|
|
# any subsequent devices within its subtree as the
|
|
# top-level device could not be deactivated anyway
|
|
test $skip -eq 1 && {
|
|
# reset 'skip' on top level device
|
|
is_top_level_device && skip=0 || continue
|
|
}
|
|
|
|
# check if the device is not on the skip list already
|
|
test -z ${SKIP_DEVICE_LIST["$kname"]} || continue
|
|
|
|
# try to deactivate top-level device, set 'skip=1'
|
|
# if it fails to do so - this will cause all the
|
|
# device's subtree to be skipped when processing
|
|
# devices further in this loop
|
|
deactivate || skip=1
|
|
done <<< "`$LSBLK -s`"
|
|
else
|
|
# Deactivate only specified devices
|
|
while test $# -ne 0; do
|
|
# Single dm device tree deactivation.
|
|
if test -b "$1"; then
|
|
$LSBLK_READ <<< "`$LSBLK --nodeps $1`"
|
|
|
|
# check if the device is not on the skip list already
|
|
test -z ${SKIP_DEVICE_LIST["$kname"]} || continue
|
|
|
|
deactivate
|
|
else
|
|
echo "$1: device not found"
|
|
return 1
|
|
fi
|
|
shift
|
|
done;
|
|
fi
|
|
}
|
|
|
|
get_dmopts() {
|
|
ORIG_IFS=$IFS; IFS=','
|
|
|
|
for opt in $1; do
|
|
case $opt in
|
|
"") ;;
|
|
"retry") DMSETUP_OPTS+="--retry " ;;
|
|
"force") DMSETUP_OPTS+="--force " ;;
|
|
*) echo "$opt: unknown DM option"
|
|
esac
|
|
done
|
|
|
|
IFS=$ORIG_IFS
|
|
}
|
|
|
|
get_lvmopts() {
|
|
ORIG_IFS=$IFS; IFS=','
|
|
|
|
for opt in $1; do
|
|
case "$opt" in
|
|
"") ;;
|
|
"retry") LVM_CONFIG="activation{retry_deactivation=1}" ;;
|
|
"wholevg") LVM_DO_WHOLE_VG=1 ;;
|
|
*) echo "$opt: unknown LVM option"
|
|
esac
|
|
done
|
|
|
|
IFS=$ORIG_IFS
|
|
}
|
|
|
|
while test $# -ne 0; do
|
|
case "$1" in
|
|
"") ;;
|
|
"-h"|"--help") usage ;;
|
|
"-d"|"--dmoption ") get_dmopts "$2" ; shift ;;
|
|
"-l"|"--lvmoption ") get_lvmopts "$2" ; shift ;;
|
|
"-u"|"--umount") DO_UMOUNT=1 ;;
|
|
*) break ;;
|
|
esac
|
|
shift
|
|
done
|
|
|
|
deactivate_all "$@"
|