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#!/bin/sh
_remove_dm() {
local dev="$1"
local final="$2"
local s
local devname
for s in /sys/block/"${dev}"/holders/dm-*; do
[ -e "${s}" ] || continue
_remove_dm "${s##*/}" "$final" || return $?
done
read -r devname < /sys/block/"${dev}"/dm/name
case $(cat /sys/block/"${dev}"/dm/uuid) in
mpath-*)
# multipath devices might have MD devices on top,
# which are removed after this script. So do not
# remove those to avoid spurious errors
return 0
;;
CRYPT-*)
if command -v systemd-cryptsetup > /dev/null; then
DM_DISABLE_UDEV=true SYSTEMD_LOG_LEVEL=debug systemd-cryptsetup detach "$devname" && return 0
elif command -v cryptsetup > /dev/null; then
DM_DISABLE_UDEV=true cryptsetup close --debug "$devname" && return 0
else
dmsetup -v --noudevsync remove "$devname"
return $?
fi
# try using plain dmsetup if we're on the final attempt.
[ -z "$final" ] && return 1
;;
esac
dmsetup -v --noudevsync remove "$devname"
return $?
}
_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##*/}" "$final" || ret=$?
else
_remove_dm "${dev##*/}" "$final" > /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
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