tests/test-truncate-extents.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 # Unfortunately the output of this test depends on the PAGE_SIZE
  34 # defined in common/sparse/sparse.c and would change (breaking the
  35 # test) if we ever changed that definition.
  36
  37 source ./functions.sh
  38 set -e
  39 set -x
  40
  41 requires jq --version
  42 requires qemu-img --version
  43 requires qemu-img map --help
  44
  45 out="test-truncate-extents.out"
  46 expected="test-truncate-extents.expected"
  47 files="$out $expected"
  48 rm -f $files
  49 cleanup_fn rm -f $files
  50
  51 do_test ()
  52 {
  53     # We use jq to normalize the output and convert it to plain text.
  54     nbdkit -U - \
  55            --filter=truncate \
  56            data data="$1" size="$2" \
  57            truncate="$3" \
  58            --run 'qemu-img map -f raw --output=json $nbd' |
  59         jq -c '.[] | {start:.start, length:.length, data:.data, zero:.zero}' \
  60            > $out
  61     if ! cmp $out $expected; then
  62         echo "$0: output did not match expected data"
  63         echo "expected:"
  64         cat $expected
  65         echo "output:"
  66         cat $out
  67         exit 1
  68     fi
  69 }
  70
  71 # Completely sparse disk.
  72 cat > $expected <<'EOF'
  73 {"start":0,"length":65536,"data":false,"zero":true}
  74 EOF
  75 do_test "" 1M 65536
  76
  77 # Completely allocated disk.
  78 cat > $expected <<'EOF'
  79 {"start":0,"length":32768,"data":true,"zero":false}
  80 EOF
  81 do_test "1 @32768 1 @65536 1 @98304 1" 128K 32768
  82
  83 #----------------------------------------------------------------------
  84 # The above are the easy cases.  Now let's truncate to a larger
  85 # size which should create a hole at the end.
  86
  87 # Completely sparse disk.
  88 cat > $expected <<'EOF'
  89 {"start":0,"length":1048576,"data":false,"zero":true}
  90 EOF
  91 do_test "" 65536 1M
  92
  93 # Completely allocated disk.
  94 cat > $expected <<'EOF'
  95 {"start":0,"length":512,"data":true,"zero":false}
  96 {"start":512,"length":1048064,"data":false,"zero":true}
  97 EOF
  98 do_test "1" 512 1M
  99
 100 # Zero-length plugin.  Unlike nbdkit-zero-plugin, the data plugin
 101 # advertises extents and so will behave differently.
 102 cat > $expected <<'EOF'
 103 {"start":0,"length":0,"data":false,"zero":false}
 104 EOF
 105 do_test "" 0 0