tests/test-split-extents.sh

   1 #!/usr/bin/env bash
   2 # nbdkit
   3 # Copyright (C) 2018-2020 Red Hat Inc.
   4 #
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  23 # PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
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  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 nbdsh --base-allocation -c 'exit(not h.supports_uri())'
  40 requires truncate --help
  41 requires stat --help
  42
  43 files="test-split-extents.1 test-split-extents.2"
  44 rm -f $files
  45 cleanup_fn rm -f $files
  46
  47 # Create two files, each half data and half sparse
  48 truncate --size=512k test-split-extents.1
  49 if test "$(stat -c %b test-split-extents.1)" != 0; then
  50     echo "$0: unable to create sparse file, skipping this test"
  51     exit 77
  52 fi
  53 printf %$((512*1024))d 1 >> test-split-extents.1
  54 printf %$((512*1024))d 1 >> test-split-extents.2
  55 truncate --size=1M test-split-extents.2
  56
  57 # Test the split plugin
  58 nbdkit -v -U - split test-split-extents.1 test-split-extents.2 \
  59        --run 'nbdsh --base-allocation --uri $uri -c "
  60 entries = []
  61 def f (metacontext, offset, e, err):
  62     global entries
  63     assert err.value == 0
  64     assert metacontext == nbd.CONTEXT_BASE_ALLOCATION
  65     entries = e
  66 h.block_status (2 * 1024 * 1024, 0, f)
  67 assert entries == [ 512 * 1024, 3,
  68                     1024 * 1024, 0,
  69                     512 * 1024, 3 ]
  70 entries = []
  71 # With req one, extents stop at file boundaries
  72 h.block_status (1024 * 1024, 768 * 1024, f, nbd.CMD_FLAG_REQ_ONE)
  73 assert entries == [ 256 * 1024, 0 ]
  74        "'