tests/test-file-extents.sh

   1 #!/usr/bin/env bash
   2 # nbdkit
   3 # Copyright Red Hat
   4 #
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   6 # modification, are permitted provided that the following conditions are
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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
  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
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  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 # The output of qemu-img map on the local sparse file ‘disk’ should be
  34 # identical to the output when we use the file plugin to read the
  35 # extents.
  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 # The file plugin must support reading file extents.
  46 requires sh -c 'nbdkit file --dump-plugin | grep file_extents=yes'
  47
  48 files="test-file-extents.tmp test-file-extents.nbdkit test-file-extents.local"
  49 rm -f $files
  50 cleanup_fn rm -f $files
  51
  52 # We can't guarantee whether disk will be sparse, or even what filesystem
  53 # it is on (qemu might avoid SEEK_HOLE for performance reasons); add some
  54 # debug crumbs, but don't fail the test if there is no GNU coreutils stat.
  55 stat disk || :
  56 stat -f disk || :
  57
  58 qemu-img map -f raw --output=json disk > test-file-extents.tmp
  59 cat test-file-extents.tmp
  60 jq -c '.[] | {start:.start, length:.length, data:.data, zero:.zero}' \
  61   < test-file-extents.tmp > test-file-extents.local
  62 nbdkit -U - file disk --run 'qemu-img map -f raw --output=json $nbd' \
  63   > test-file-extents.tmp
  64 cat test-file-extents.tmp
  65 jq -c '.[] | {start:.start, length:.length, data:.data, zero:.zero}' \
  66   < test-file-extents.tmp > test-file-extents.nbdkit
  67
  68 diff -u test-file-extents.nbdkit test-file-extents.local