tests/test-cow-extents2.sh

   1 #!/usr/bin/env bash
   2 # nbdkit
   3 # Copyright (C) 2018-2021 Red Hat Inc.
   4 #
   5 # Redistribution and use in source and binary forms, with or without
   6 # modification, are permitted provided that the following conditions are
   7 # met:
   8 #
   9 # * Redistributions of source code must retain the above copyright
  10 # notice, this list of conditions and the following disclaimer.
  11 #
  12 # * Redistributions in binary form must reproduce the above copyright
  13 # notice, this list of conditions and the following disclaimer in the
  14 # documentation and/or other materials provided with the distribution.
  15 #
  16 # * Neither the name of Red Hat nor the names of its contributors may be
  17 # used to endorse or promote products derived from this software without
  18 # specific prior written permission.
  19 #
  20 # THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
  21 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22 # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  23 # PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
  24 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  27 # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  28 # ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  29 # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  30 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31 # SUCH DAMAGE.
  32
  33 source ./functions.sh
  34 set -e
  35 set -x
  36
  37 requires_filter cow
  38 requires_plugin file
  39 requires test -f disk
  40 requires cmp --version
  41 requires dd --version
  42 requires guestfish --version
  43 requires_nbdcopy
  44
  45 copy=cow-extents2.img
  46 sparse=cow-extents2-sparse.img
  47 pid=cow-extents2.pid
  48 sock=$(mktemp -u /tmp/nbdkit-test-sock.XXXXXX)
  49 files="$copy $sparse $pid $sock"
  50 rm -f $files
  51 cleanup_fn rm -f $files
  52
  53 # Copy the original disk using 'dd' so it becomes fully allocated.
  54 dd if=disk of=$copy
  55
  56 # Run nbdkit with the cow filter on top.
  57 start_nbdkit -P $pid -U $sock --filter=cow file $copy
  58
  59 guestfish -a "nbd:///?socket=$sock" <<EOF
  60   run
  61 # Sparsify it into the overlay.
  62   mount /dev/sda1 /
  63   fstrim /
  64   umount /dev/sda1
  65 # After remounting check we can list the files and read the hello.txt file.
  66   mount /dev/sda1 /
  67   find /
  68   cat /hello.txt
  69 EOF
  70
  71 # Copy out the disk to a local file.
  72 # This should exercise extents information.
  73 nbdcopy "nbd+unix:///?socket=$sock" $sparse
  74
  75 # We can only visually check that the file has been sparsified.  We do
  76 # not expect the files to be bit for bit identical after running
  77 # fstrim.
  78 ls -lsh disk $copy $sparse