tests/test-split-extents.sh

   1 #!/usr/bin/env bash
   2 # nbdkit
   3 # Copyright Red Hat
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  20 # THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
  21 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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  23 # PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
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  30 # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31 # SUCH DAMAGE.
  32
  33 # Concatenating sparse and data files should have observable extents.
  34
  35 source ./functions.sh
  36 set -e
  37 set -x
  38
  39 requires_run
  40 requires_nbdsh_uri
  41 requires nbdsh --base-allocation
  42 requires $TRUNCATE --help
  43 requires $STAT --help
  44
  45 files="test-split-extents.1 test-split-extents.2"
  46 rm -f $files
  47 cleanup_fn rm -f $files
  48
  49 # Create two files, each half data and half sparse
  50 $TRUNCATE -s 512k test-split-extents.1
  51 if test "$($STAT -c %b test-split-extents.1)" != 0; then
  52     echo "$0: unable to create sparse file, skipping this test"
  53     exit 77
  54 fi
  55 printf %$((512*1024))d 1 >> test-split-extents.1
  56 printf %$((512*1024))d 1 >> test-split-extents.2
  57 $TRUNCATE -s 1M test-split-extents.2
  58
  59 # Test the split plugin
  60 nbdkit -v -U - split test-split-extents.1 test-split-extents.2 \
  61        --run 'nbdsh --base-allocation --uri "$uri" -c "
  62 entries = []
  63 def f(metacontext, offset, e, err):
  64     global entries
  65     assert err.value == 0
  66     assert metacontext == nbd.CONTEXT_BASE_ALLOCATION
  67     entries = e
  68 h.block_status(2 * 1024 * 1024, 0, f)
  69 assert entries == [ 512 * 1024, 3,
  70                     1024 * 1024, 0,
  71                     512 * 1024, 3 ]
  72 entries = []
  73 # With req one, extents stop at file boundaries
  74 h.block_status(1024 * 1024, 768 * 1024, f, nbd.CMD_FLAG_REQ_ONE)
  75 assert entries == [ 256 * 1024, 0 ]
  76        "'