diff options
Diffstat (limited to 'shutdown')
| -rwxr-xr-x | shutdown | 64 |
1 files changed, 64 insertions, 0 deletions
@@ -1,5 +1,59 @@ #!/usr/bin/ash +# teardown a single device by node name +# $1: device node name, e.g. md0, dm-2 +stop_device() { + local devtype= devname= + + # the device must still be active + [ -e "/sys/class/block/$1" ] || return 1 + + # this can sometimes fail on stopped md devices, when the + # sysfs node doesn't go away as quickly as i'd like it to. + devtype=$(lsblk -drno TYPE "/dev/$1" 2>/dev/null) || return 1 + case $devtype in + crypt) + read devname <"$1/dm/name" + cryptsetup luksClose "$devname" + ;; + dm|lvm) + # disassemble the parent VG + read devname <"$1/dm/name" + lvm lvdisplay -c "/dev/mapper/$devname" | { + IFS=: read _ vgname _ + lvm vgchange -an "$vgname" + } + ;; + raid*) + mdadm --stop "/dev/$1" + ;; + dmraid) + # XXX: i have no idea how dmraid works + dmraid -an + ;; + # silently ignore unstacked devices + esac +} + +# recursively disassemble a device chain +# $1: device node name, e.g. md0, dm-2 +disassemble() { + local holder= + + for holder in "$1"/holders/*; do + if [ ! -e "$holder" ]; then + # end of the chain, recurse back up + stop_device "$1" + return + fi + disassemble "${holder##*/}" + stop_device "$1" + done +} + +printf '%s\n' "Unmounting all devices." + +# unmount everything, but leave the API mounts findmnt -Rruno TARGET /oldroot | awk ' BEGIN { i = 0 } ! /^\/(proc|dev|sys)/ { @@ -15,6 +69,16 @@ END { umount -l "$mount" done +printf '%s\n' "Disassembling stacked devices." + +# chdir, so that we can avoid a lot of path chopping +cd /sys/class/block + +# iterate over devices with holders +for part in */holders/*; do + [ -e "$part" ] && disassemble "${part%%/*}" +done + case $1 in poweroff|shutdown|halt) "$1" -f |