tests/qemu-iotests/253

   1 #!/usr/bin/env bash
   2 #
   3 # Test qemu-img vs. unaligned images; O_DIRECT version
   4 # (Originates from 221)
   5 #
   6 # Copyright (C) 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 $seq"
  24
  25 status=1 # failure is the default!
  26
  27 _cleanup()
  28 {
  29     _cleanup_test_img
  30 }
  31 trap "_cleanup; exit \$status" 0 1 2 3 15
  32
  33 # get standard environment, filters and checks
  34 . ./common.rc
  35 . ./common.filter
  36
  37 _supported_fmt raw
  38 _supported_proto file
  39 _supported_os Linux
  40
  41 _default_cache_mode none
  42 _supported_cache_modes none directsync
  43
  44 echo
  45 echo "=== Check mapping of unaligned raw image ==="
  46 echo
  47
  48 # We do not know how large a physical sector is, but it is certainly
  49 # going to be a factor of 1 MB
  50 size=$((1 * 1024 * 1024 - 1))
  51
  52 # qemu-img create rounds size up to BDRV_SECTOR_SIZE
  53 _make_test_img $size
  54 $QEMU_IMG map --output=json --image-opts \
  55     "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \
  56     | _filter_qemu_img_map
  57
  58 # so we resize it and check again
  59 truncate --size=$size "$TEST_IMG"
  60 $QEMU_IMG map --output=json --image-opts \
  61     "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \
  62     | _filter_qemu_img_map
  63
  64 # qemu-io with O_DIRECT always writes whole physical sectors.  Again,
  65 # we do not know how large a physical sector is, so we just start
  66 # writing from a 64 kB boundary, which should always be aligned.
  67 offset=$((1 * 1024 * 1024 - 64 * 1024))
  68 $QEMU_IO -c "w $offset $((size - offset))" "$TEST_IMG" | _filter_qemu_io
  69 $QEMU_IMG map --output=json --image-opts \
  70     "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \
  71     | _filter_qemu_img_map
  72
  73 # Resize it and check again -- contrary to 221, we may not get partial
  74 # sectors here, so there should be only two areas (one zero, one
  75 # data).
  76 truncate --size=$size "$TEST_IMG"
  77 $QEMU_IMG map --output=json --image-opts \
  78     "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \
  79     | _filter_qemu_img_map
  80
  81 # success, all done
  82 echo '*** done'
  83 rm -f $seq.full
  84 status=0