cheap-unsnapshot.sh

   1 #!/bin/sh
   2
   3 set -e
   4 set -x
   5
   6 BASE="$1"
   7 BASEDUP="basedup"
   8 ORIGIN="origin"
   9 TOP="top"
  10
  11 [ -e "/dev/mapper/$BASE" ] || exit 1
  12
  13 dmsetup suspend $BASE
  14 dmsetup remove $TOP
  15 dmsetup remove $ORIGIN
  16 dmsetup table $BASEDUP | dmsetup load $BASE
  17 dmsetup resume $BASE