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
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  10 # notice, this list of conditions and the following disclaimer.
  11 #
  12 # * Redistributions in binary form must reproduce the above copyright
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  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
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  23 # PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
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  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 --version
  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