copy/copy-block-to-nbd.sh

   1 #!/usr/bin/env bash
   2 # nbd client library in userspace
   3 # Copyright Red Hat
   4 #
   5 # This library is free software; you can redistribute it and/or
   6 # modify it under the terms of the GNU Lesser General Public
   7 # License as published by the Free Software Foundation; either
   8 # version 2 of the License, or (at your option) any later version.
   9 #
  10 # This library is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 # Lesser General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU Lesser General Public
  16 # License along with this library; if not, write to the Free Software
  17 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  18
  19 . ../tests/functions.sh
  20
  21 set -e
  22 set -x
  23
  24 requires_root
  25 requires_caps cap_sys_admin
  26 requires nbdkit --exit-with-parent --version
  27 requires test -r /sys/module/nbd
  28 requires nbd-client --version
  29 # /dev/nbd0 must not be in use.
  30 requires_not nbd-client -c /dev/nbd0
  31
  32 pidfile=copy-block-to-nbd.pid
  33 sock=$(mktemp -u /tmp/libnbd-test-copy.XXXXXX)
  34 cleanup_fn rm -f $pidfile $sock
  35 cleanup_fn nbd-client -d /dev/nbd0
  36
  37 # Run an nbdkit server to act as the backing for /dev/nbd0.
  38 nbdkit --exit-with-parent -f -v -P $pidfile -U $sock pattern size=5M &
  39 # Wait for the pidfile to appear.
  40 for i in {1..60}; do
  41     if test -f $pidfile; then
  42         break
  43     fi
  44     sleep 1
  45 done
  46 if ! test -f $pidfile; then
  47     echo "$0: nbdkit did not start up"
  48     exit 1
  49 fi
  50
  51 nbd-client -unix $sock /dev/nbd0 -b 512
  52
  53 $VG nbdcopy -- /dev/nbd0 [ nbdkit --exit-with-parent -v memory 5M ]