#!/bin/sh
_remove_dm() {
local dev=$1
local s
local devname
for s in /sys/block/${dev}/holders/dm-* ; do
[ -e ${s} ] || continue
_remove_dm ${s##*/}
done
# multipath devices might have MD devices on top,
# which are removed after this script. So do not
# remove those to avoid spurious errors
case $(cat /sys/block/${dev}/dm/uuid) in
mpath-*)
return 0
;;
*)
devname=$(cat /sys/block/${dev}/dm/name)
dmsetup -v --noudevsync remove "$devname" || return $?
;;
esac
return 0
}
_do_dm_shutdown() {
local ret=0
local final=$1
local dev
info "Disassembling device-mapper devices"
for dev in /sys/block/dm-* ; do
[ -e ${dev} ] || continue
if [ "x$final" != "x" ]; then
_remove_dm ${dev##*/} || ret=$?
else
_remove_dm ${dev##*/} >/dev/null 2>&1 || ret=$?
fi
done
if [ "x$final" != "x" ]; then
info "dmsetup ls --tree"
dmsetup ls --tree 2>&1 | vinfo
fi
return $ret
}
if command -v dmsetup >/dev/null &&
[ "x$(dmsetup status)" != "xNo devices found" ]; then
_do_dm_shutdown $1
else
:
fi
