tests/test-readahead-copy.sh

   1 #!/usr/bin/env bash
   2 # nbdkit
   3 # Copyright (C) 2018-2019 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 qemu-img --version
  38
  39 files="readahead-copy1.img readahead-copy2.img"
  40 rm -f $files
  41 cleanup_fn rm -f $files
  42
  43 # Run nbdkit with and without the readahead filter and a very sparse
  44 # disk with bytes scattered around.  Compare the two outputs which
  45 # should be identical.
  46 #
  47 # Note we must set the size to a multiple of 512 bytes else qemu-img
  48 # cannot cope.
  49 data="            1
  50          @0x10001 2
  51         @0x100020 3
  52        @0x1000301 4
  53       @0x10004020 5
  54       @0x20050301 6
  55       @0x40604020 7
  56       @0x87050300 8
  57      @0x100000000 9 "
  58 size=$((2**32 + 512))
  59
  60 nbdkit -v -U - --filter=readahead data data="$data" size=$size \
  61        --run 'qemu-img convert $nbd readahead-copy1.img'
  62 nbdkit -v -U -                    data data="$data" size=$size \
  63        --run 'qemu-img convert $nbd readahead-copy2.img'
  64
  65 # Check the output.
  66 cmp readahead-copy{1,2}.img
  67