tests/qemu-iotests/221

   1 #!/usr/bin/env bash
   2 #
   3 # Test qemu-img vs. unaligned images
   4 # (See also 253, which is the O_DIRECT version)
   5 #
   6 # Copyright (C) 2018-2019 Red Hat, Inc.
   7 #
   8 # This program is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 2 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 #
  21
  22 seq="$(basename $0)"
  23 echo "QA output created by $seq"
  24
  25 status=1 # failure is the default!
  26
  27 _cleanup()
  28 {
  29     _cleanup_test_img
  30 }
  31 trap "_cleanup; exit \$status" 0 1 2 3 15
  32
  33 # get standard environment, filters and checks
  34 . ./common.rc
  35 . ./common.filter
  36
  37 _supported_fmt raw
  38 _supported_proto file fuse
  39 _supported_os Linux
  40
  41 _default_cache_mode writeback
  42 _supported_cache_modes writeback writethrough unsafe
  43
  44 echo
  45 echo "=== Check mapping of unaligned raw image ==="
  46 echo
  47
  48 _make_test_img 65537 # qemu-img create rounds size up
  49
  50 # file-posix allocates the first block of any images when it is created;
  51 # the size of this block depends on the host page size and the file
  52 # system block size, none of which are constant.  Discard the whole
  53 # image so we will not see this allocation in qemu-img map's output.
  54 $QEMU_IO -c 'discard 0 65537' "$TEST_IMG" | _filter_qemu_io
  55
  56 $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
  57
  58 truncate --size=65537 "$TEST_IMG" # so we resize it and check again
  59 $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
  60
  61 $QEMU_IO -c 'w 65536 1' "$TEST_IMG" | _filter_qemu_io # writing also rounds up
  62 $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
  63
  64 truncate --size=65537 "$TEST_IMG" # so we resize it and check again
  65 $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
  66
  67 # success, all done
  68 echo '*** done'
  69 rm -f $seq.full
  70 status=0