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593 lines
16 KiB
Bash
593 lines
16 KiB
Bash
#!/bin/bash
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#
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# Copyright (C) 2012-2020 Red Hat, Inc. All rights reserved.
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#
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# This file is part of LVM2.
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#
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# This copyrighted material is made available to anyone wishing to use,
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# modify, copy, or redistribute it subject to the terms and conditions
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# of the GNU General Public License v.2.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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#
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# Author: Peter Rajnoha <prajnoha at redhat.com>
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#
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# Script for deactivating block devices
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#
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# Requires:
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# bash >= 4.0 (associative array support)
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# util-linux {
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# lsblk >= 2.22 (lsblk -s support)
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# umount
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# }
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# dmsetup >= 1.02.68 (--retry option support)
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# lvm >= 2.2.89 (activation/retry_deactivation config support)
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#
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#set -x
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shopt -s dotglob nullglob
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TOOL=blkdeactivate
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DEV_DIR="/dev"
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SYS_BLK_DIR="/sys/block"
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MDADM="/sbin/mdadm"
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MOUNTPOINT="/bin/mountpoint"
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MPATHD="/sbin/multipathd"
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UMOUNT="/bin/umount"
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VDO="/bin/vdo"
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sbindir="@SBINDIR@"
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DMSETUP="$sbindir/dmsetup"
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LVM="$sbindir/lvm"
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if "$UMOUNT" --help | grep -- "--all-targets" >"$DEV_DIR/null"; then
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UMOUNT_OPTS="--all-targets "
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else
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UMOUNT_OPTS=""
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FINDMNT="/bin/findmnt -r --noheadings -u -o TARGET"
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FINDMNT_READ="read -r mnt"
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fi
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DMSETUP_OPTS=""
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LVM_OPTS=""
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MDADM_OPTS=""
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MPATHD_OPTS=""
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VDO_OPTS=""
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LSBLK="/bin/lsblk -r --noheadings -o TYPE,KNAME,NAME,MOUNTPOINT"
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LSBLK_VARS="local devtype local kname local name local mnt"
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LSBLK_READ="read -r devtype kname name mnt"
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SORT_MNT="/bin/sort -r -u -k 4"
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# Do not show tool errors by default (only done/skipping summary
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# message provided by this script) and no verbose mode by default.
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ERRORS=0
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VERBOSE=0
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# Do not unmount mounted devices by default.
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DO_UMOUNT=0
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# Deactivate each LV separately by default (not the whole VG).
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LVM_DO_WHOLE_VG=0
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# Do not retry LV deactivation by default.
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LVM_CONFIG="activation{retry_deactivation=0}"
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# Do not wait for MD RAID device resync, recovery or reshape.
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MDRAID_DO_WAIT=0
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# Do not disable queueing if set on multipath devices.
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MPATHD_DO_DISABLEQUEUEING=0
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#
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# List of device names and/or VGs to be skipped.
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# Device name is the KNAME from lsblk output.
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#
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# If deactivation of any device fails, it's automatically
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# added to the SKIP_DEVICE_LIST (also a particular VG
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# added to the SKIP_VG_LIST for a device that is an LV).
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#
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# These lists provide device tree pruning to skip
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# particular device/VG deactivation that failed already.
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# (lists are associative arrays!)
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#
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declare -A SKIP_DEVICE_LIST=()
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declare -A SKIP_VG_LIST=()
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#
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# List of mountpoints to be skipped. Any device that is mounted on the mountpoint
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# listed here will be added to SKIP_DEVICE_LIST (and SKIP_VG_LIST) automatically.
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# (list is an associative array!)
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#
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declare -A SKIP_UMOUNT_LIST=(["/"]=1 \
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["/lib"]=1 ["/lib64"]=1 \
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["/bin"]=1 ["/sbin"]=1 \
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["/var"]=1 ["/var/log"]=1 \
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["/usr"]=1 \
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["/usr/lib"]=1 ["/usr/lib64"]=1 \
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["/usr/sbin"]=1 ["/usr/bin"]=1)
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# Bash can't properly handle '[' and ']' used as a subscript
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# within the '()'initialization - it needs to be done separately!
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SKIP_UMOUNT_LIST["[SWAP]"]=1
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usage() {
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echo "${TOOL}: Utility to deactivate block devices"
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echo
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echo " ${TOOL} [options] [device...]"
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echo " - Deactivate block device tree."
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echo " If devices are specified, deactivate only supplied devices and their holders."
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echo
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echo " Options:"
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echo " -e | --errors Show errors reported from tools"
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echo " -h | --help Show this help message"
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echo " -d | --dmoptions DM_OPTIONS Comma separated DM specific options"
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echo " -l | --lvmoptions LVM_OPTIONS Comma separated LVM specific options"
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echo " -m | --mpathoptions MPATH_OPTIONS Comma separated DM-multipath specific options"
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echo " -r | --mdraidoptions MDRAID_OPTIONS Comma separated MD RAID specific options"
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echo " -o | --vdooptions VDO_OPTIONS Comma separated VDO specific options"
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echo " -u | --umount Unmount the device if mounted"
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echo " -v | --verbose Verbose mode (also implies -e)"
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echo
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echo " Device specific options:"
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echo " DM_OPTIONS:"
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echo " retry retry removal several times in case of failure"
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echo " force force device removal"
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echo " LVM_OPTIONS:"
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echo " retry retry removal several times in case of failure"
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echo " wholevg deactivate the whole VG when processing an LV"
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echo " MDRAID_OPTIONS:"
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echo " wait wait for resync, recovery or reshape to complete first"
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echo " MPATH_OPTIONS:"
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echo " disablequeueing disable queueing on all DM-multipath devices first"
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echo " VDO_OPTIONS:"
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echo " configfile=file use specified VDO configuration file"
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exit
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}
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add_device_to_skip_list() {
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SKIP_DEVICE_LIST+=(["$kname"]=1)
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return 1
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}
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add_vg_to_skip_list() {
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SKIP_VG_LIST+=(["$DM_VG_NAME"]=1)
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return 1
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}
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is_top_level_device() {
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# top level devices do not have any holders, that is
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# the SYS_BLK_DIR/<device_name>/holders dir is empty
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files=$(echo "$SYS_BLK_DIR/$kname/holders/"*)
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test -z "$files"
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}
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device_umount_one() {
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test -z "$mnt" && return 0
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if test -z "${SKIP_UMOUNT_LIST["$mnt"]}" -a "$DO_UMOUNT" -eq "1"; then
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echo -n " [UMOUNT]: unmounting $name ($kname) mounted on $mnt... "
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if eval "$UMOUNT" $UMOUNT_OPTS "$(printf "%s" "$mnt")" "$OUT" "$ERR"; then
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echo "done"
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elif "$MOUNTPOINT" -q "$mnt"; then
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echo "skipping"
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add_device_to_skip_list
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else
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echo "already unmounted"
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fi
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else
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echo " [SKIP]: unmount of $name ($kname) mounted on $mnt"
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add_device_to_skip_list
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fi
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}
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device_umount() {
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test "$devtype" != "lvm" && test "${kname:0:3}" != "dm-" \
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&& test "${kname:0:2}" != "md" && return 0
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# FINDMNT is defined only if umount --all-targets is not available.
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# In that case, read the list of multiple mount points of one device
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# using FINDMNT and unmount it one by one manually.
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if test -z "$FINDMNT"; then
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device_umount_one
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else
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while $FINDMNT_READ; do
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device_umount_one || return 1
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done <<< "$($FINDMNT "$DEV_DIR/$kname")"
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fi
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}
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deactivate_holders () {
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local skip=1; $LSBLK_VARS
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# Get holders for the device - either a mount or another device.
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# First line on the lsblk output is the device itself - skip it for
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# the deactivate call as this device is already being deactivated.
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while $LSBLK_READ; do
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test -e "$SYS_BLK_DIR/$kname" || continue
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# check if the device not on the skip list already
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test -z "${SKIP_DEVICE_LIST["$kname"]}" || return 1
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# try to deactivate the holder
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test "$skip" -eq 1 && skip=0 && continue
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deactivate || return 1
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done <<< "$($LSBLK "$1")"
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}
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deactivate_dm () {
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local xname
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xname=$(printf "%s" "$name")
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test -b "$DEV_DIR/mapper/$xname" || return 0
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test -z "${SKIP_DEVICE_LIST["$kname"]}" || return 1
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deactivate_holders "$DEV_DIR/mapper/$xname" || return 1
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echo -n " [DM]: deactivating $devtype device $xname ($kname)... "
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if eval "$DMSETUP" $DMSETUP_OPTS remove "$xname" "$OUT" "$ERR"; then
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echo "done"
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else
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echo "skipping"
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add_device_to_skip_list
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fi
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}
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deactivate_lvm () {
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local DM_VG_NAME; local DM_LV_NAME
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eval "$(eval "$DMSETUP" splitname --nameprefixes --noheadings --rows "$name" LVM "$ERR")"
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test -b "$DEV_DIR/$DM_VG_NAME/$DM_LV_NAME" || return 0
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test -z "${SKIP_VG_LIST["$DM_VG_NAME"]}" || return 1
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if test "$LVM_DO_WHOLE_VG" -eq 0; then
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# Skip LVM device deactivation if LVM tools missing.
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test "$LVM_AVAILABLE" -eq 0 && {
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add_device_to_skip_list
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return 1
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}
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# Deactivating only the LV specified
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deactivate_holders "$DEV_DIR/$DM_VG_NAME/$DM_LV_NAME" || {
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add_device_to_skip_list
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return 1
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}
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echo -n " [LVM]: deactivating Logical Volume $DM_VG_NAME/$DM_LV_NAME... "
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if eval "$LVM" lvchange $LVM_OPTS --config \'log\{prefix=\"\"\} $LVM_CONFIG\' -aln "$DM_VG_NAME/$DM_LV_NAME" "$OUT" "$ERR"; then
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echo "done"
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else
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echo "skipping"
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add_device_to_skip_list
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fi
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else
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# Skip LVM VG deactivation if LVM tools missing.
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test "$LVM_AVAILABLE" -eq 0 && {
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add_vg_to_skip_list
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return 1
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}
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# Deactivating the whole VG the LV is part of
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lv_list=$(eval "$LVM" vgs --config "$LVM_CONFIG" --noheadings --rows -o lv_name "$DM_VG_NAME" "$ERR")
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for lv in $lv_list; do
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test -b "$DEV_DIR/$DM_VG_NAME/$lv" || continue
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deactivate_holders "$DEV_DIR/$DM_VG_NAME/$lv" || {
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add_vg_to_skip_list
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return 1
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}
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done
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echo -n " [LVM]: deactivating Volume Group $DM_VG_NAME... "
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if eval "$LVM" vgchange $LVM_OPTS --config \'log\{prefix=\" \"\} $LVM_CONFIG\' -aln "$DM_VG_NAME" "$OUT" "$ERR"; then
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echo "done"
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else
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echo "skipping"
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add_vg_to_skip_list
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fi
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fi
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}
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deactivate_md () {
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local xname
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xname=$(printf "%s" "$name")
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local sync_action
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test -b "$DEV_DIR/$xname" || return 0
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test -z "${SKIP_DEVICE_LIST["$kname"]}" || return 1
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# Skip MD device deactivation if MD tools missing.
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test "$MDADM_AVAILABLE" -eq 0 && {
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add_device_to_skip_list
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return 1
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}
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deactivate_holders "$DEV_DIR/$xname" || return 1
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echo -n " [MD]: deactivating $devtype device $kname... "
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test "$MDRAID_DO_WAIT" -eq 1 && {
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sync_action=$(cat "$SYS_BLK_DIR/$kname/md/sync_action")
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test "$sync_action" != "idle" && {
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echo -n "$sync_action action in progress... "
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if eval "$MDADM" $MDADM_OPTS -W "$DEV_DIR/$kname" "$OUT" "$ERR"; then
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echo -n "complete... "
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else
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test $? -ne 1 && echo -n "failed to wait for $sync_action action... "
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fi
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}
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}
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if eval "$MDADM" $MDADM_OPTS -S "$xname" "$OUT" "$ERR"; then
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echo "done"
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else
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echo "skipping"
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add_device_to_skip_list
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fi
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}
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deactivate_vdo() {
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local xname
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xname=$(printf "%s" "$name")
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test -b "$DEV_DIR/mapper/$xname" || return 0
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test -z "${SKIP_DEVICE_LIST["$kname"]}" || return 1
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# Skip VDO device deactivation if VDO tools missing.
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test "$VDO_AVAILABLE" -eq 0 && {
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add_device_to_skip_list
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return 1
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}
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deactivate_holders "$DEV_DIR/mapper/$xname" || return 1
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echo -n " [VDO]: deactivating VDO volume $xname... "
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if eval "$VDO" stop $VDO_OPTS --name="$xname" "$OUT" "$ERR"; then
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echo "done"
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else
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echo "skipping"
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add_device_to_skip_list
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fi
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}
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deactivate () {
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######################################################################
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# DEACTIVATION HOOKS FOR NEW DEVICE TYPES GO HERE! #
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# #
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# Identify a new device type either by inspecting the TYPE provided #
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# by lsblk directly ($devtype) or by any other mean that is suitable #
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# e.g. the KNAME provided by lsblk ($kname). See $LSBLK_VARS for #
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# complete list of variables that may be used. Then call a #
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# device-specific deactivation function that handles the exact type. #
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# #
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# This device-specific function will certainly need to call #
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# deactivate_holders first to recursively deactivate any existing #
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# holders it might have before deactivating the device it processes. #
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######################################################################
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if test "$devtype" = "lvm"; then
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deactivate_lvm
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elif test "$devtype" = "vdo"; then
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deactivate_vdo
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elif test "${kname:0:3}" = "dm-"; then
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deactivate_dm
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elif test "${kname:0:2}" = "md"; then
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deactivate_md
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fi
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}
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deactivate_all() {
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$LSBLK_VARS
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skip=0
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echo "Deactivating block devices:"
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test "$MPATHD_RUNNING" -eq 1 && {
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echo -n " [DM]: disabling queueing on all multipath devices... "
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eval "$MPATHD" $MPATHD_OPTS disablequeueing maps "$ERR" | grep '^ok$' >"$DEV_DIR/null" && echo "done" || echo "failed"
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}
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if test $# -eq 0; then
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#######################
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# Process all devices #
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#######################
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# Unmount all relevant mountpoints first
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while $LSBLK_READ; do
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device_umount
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done <<< "$($LSBLK | $SORT_MNT)"
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# Do deactivate
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while $LSBLK_READ; do
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# 'disk' is at the bottom already and it's a real device
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test "$devtype" = "disk" && continue
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# if deactivation of any device fails, skip processing
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# any subsequent devices within its subtree as the
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# top-level device could not be deactivated anyway
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test "$skip" -eq 1 && {
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# reset 'skip' on top level device
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if is_top_level_device ; then
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skip=0
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else
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continue
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fi
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}
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# check if the device is not on the skip list already
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test -z "${SKIP_DEVICE_LIST["$kname"]}" || continue
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# try to deactivate top-level device, set 'skip=1'
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# if it fails to do so - this will cause all the
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# device's subtree to be skipped when processing
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# devices further in this loop
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deactivate || skip=1
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done <<< "$($LSBLK -s)"
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else
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##################################
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# Process only specified devices #
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##################################
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while test $# -ne 0; do
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# Unmount all relevant mountpoints first
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while $LSBLK_READ; do
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device_umount
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done <<< "$($LSBLK "$1" | $SORT_MNT)"
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# Do deactivate
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# Single dm device tree deactivation.
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if test -b "$1"; then
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$LSBLK_READ <<< "$($LSBLK --nodeps "$1")"
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# check if the device is not on the skip list already
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test -z "${SKIP_DEVICE_LIST["$kname"]}" || {
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shift
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continue
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}
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deactivate
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else
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echo "$1: device not found"
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return 1
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fi
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shift
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done;
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fi
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}
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get_dmopts() {
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ORIG_IFS=$IFS; IFS=','
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for opt in $1; do
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case $opt in
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"") ;;
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"retry") DMSETUP_OPTS+="--retry " ;;
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"force") DMSETUP_OPTS+="--force " ;;
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*) echo "$opt: unknown DM option"
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esac
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done
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IFS=$ORIG_IFS
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}
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get_lvmopts() {
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ORIG_IFS=$IFS; IFS=','
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for opt in $1; do
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case "$opt" in
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"") ;;
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"retry") LVM_CONFIG="activation{retry_deactivation=1}" ;;
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"wholevg") LVM_DO_WHOLE_VG=1 ;;
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*) echo "$opt: unknown LVM option"
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esac
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done
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IFS=$ORIG_IFS
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}
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get_mdraidopts() {
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ORIG_IFS=$IFS; IFS=','
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for opt in $1; do
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case "$opt" in
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"") ;;
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"wait") MDRAID_DO_WAIT=1 ;;
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*) echo "$opt: unknown MD RAID option"
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esac
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done
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IFS=$ORIG_IFS
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}
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get_mpathopts() {
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ORIG_IFS=$IFS; IFS=','
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for opt in $1; do
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case "$opt" in
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"") ;;
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"disablequeueing") MPATHD_DO_DISABLEQUEUEING=1 ;;
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|
*) echo "$opt: unknown DM-multipath option"
|
|
esac
|
|
done
|
|
|
|
IFS=$ORIG_IFS
|
|
}
|
|
|
|
get_vdoopts() {
|
|
ORIG_IFS=$IFS; IFS=','
|
|
|
|
for opt in $1; do
|
|
case "$opt" in
|
|
"") ;;
|
|
configfile=*) tmp=${opt#*=}; VDO_OPTS+="--confFile=${tmp%%,*} " ;;
|
|
*) echo "$opt: unknown VDO option"
|
|
esac
|
|
done
|
|
|
|
IFS=$ORIG_IFS
|
|
}
|
|
|
|
set_env() {
|
|
if test "$ERRORS" -eq "1"; then
|
|
unset ERR
|
|
else
|
|
ERR="2>$DEV_DIR/null"
|
|
fi
|
|
|
|
if test "$VERBOSE" -eq "1"; then
|
|
unset OUT
|
|
UMOUNT_OPTS+="-v"
|
|
DMSETUP_OPTS+="-vvvv"
|
|
LVM_OPTS+="-vvvv"
|
|
MDADM_OPTS+="-vv"
|
|
MPATHD_OPTS+="-v 3"
|
|
VDO_OPTS+="--verbose "
|
|
else
|
|
OUT="1>$DEV_DIR/null"
|
|
fi
|
|
|
|
if test -f "$LVM"; then
|
|
LVM_AVAILABLE=1
|
|
else
|
|
LVM_AVAILABLE=0
|
|
fi
|
|
|
|
if test -f $MDADM; then
|
|
MDADM_AVAILABLE=1
|
|
else
|
|
MDADM_AVAILABLE=0
|
|
fi
|
|
|
|
if test -f $VDO; then
|
|
VDO_AVAILABLE=1
|
|
else
|
|
VDO_AVAILABLE=0
|
|
fi
|
|
|
|
MPATHD_RUNNING=0
|
|
test "$MPATHD_DO_DISABLEQUEUEING" -eq 1 && {
|
|
if test -f "$MPATHD"; then
|
|
if eval "$MPATHD" show daemon "$ERR" | grep "running" >"$DEV_DIR/null"; then
|
|
MPATHD_RUNNING=1
|
|
fi
|
|
fi
|
|
}
|
|
}
|
|
|
|
while test $# -ne 0; do
|
|
case "$1" in
|
|
"") ;;
|
|
"-e"|"--errors") ERRORS=1 ;;
|
|
"-h"|"--help") usage ;;
|
|
"-d"|"--dmoptions") get_dmopts "$2" ; shift ;;
|
|
"-l"|"--lvmoptions") get_lvmopts "$2" ; shift ;;
|
|
"-m"|"--mpathoptions") get_mpathopts "$2" ; shift ;;
|
|
"-r"|"--mdraidoptions") get_mdraidopts "$2"; shift ;;
|
|
"-o"|"--vdooptions") get_vdoopts "$2"; shift ;;
|
|
"-u"|"--umount") DO_UMOUNT=1 ;;
|
|
"-v"|"--verbose") VERBOSE=1 ; ERRORS=1 ;;
|
|
"-vv") VERBOSE=1 ; ERRORS=1 ; set -x ;;
|
|
*) break ;;
|
|
esac
|
|
shift
|
|
done
|
|
|
|
set_env
|
|
deactivate_all "$@"
|