tests/qemu-iotests/253

   1 #!/usr/bin/env bash
   2 # group: rw quick
   3 #
   4 # Test qemu-img vs. unaligned images; O_DIRECT version
   5 # (Originates from 221)
   6 #
   7 # Copyright (C) 2019 Red Hat, Inc.
   8 #
   9 # This program is free software; you can redistribute it and/or modify
  10 # it under the terms of the GNU General Public License as published by
  11 # the Free Software Foundation; either version 2 of the License, or
  12 # (at your option) any later version.
  13 #
  14 # This program is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 # GNU General Public License for more details.
  18 #
  19 # You should have received a copy of the GNU General Public License
  20 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 #
  22
  23 seq="$(basename $0)"
  24 echo "QA output created by $seq"
  25
  26 status=1 # failure is the default!
  27
  28 _cleanup()
  29 {
  30     _cleanup_test_img
  31 }
  32 trap "_cleanup; exit \$status" 0 1 2 3 15
  33
  34 # get standard environment, filters and checks
  35 . ./common.rc
  36 . ./common.filter
  37
  38 _supported_fmt raw
  39 _supported_proto file
  40 _supported_os Linux
  41
  42 _default_cache_mode none
  43 _supported_cache_modes none directsync
  44
  45 echo
  46 echo "=== Check mapping of unaligned raw image ==="
  47 echo
  48
  49 # We do not know how large a physical sector is, but it is certainly
  50 # going to be a factor of 1 MB
  51 size=$((1 * 1024 * 1024 - 1))
  52
  53 # qemu-img create rounds size up to BDRV_SECTOR_SIZE
  54 _make_test_img $size
  55 $QEMU_IMG map --output=json --image-opts \
  56     "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \
  57     | _filter_qemu_img_map
  58
  59 # so we resize it and check again
  60 truncate --size=$size "$TEST_IMG"
  61 $QEMU_IMG map --output=json --image-opts \
  62     "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \
  63     | _filter_qemu_img_map
  64
  65 # qemu-io with O_DIRECT always writes whole physical sectors.  Again,
  66 # we do not know how large a physical sector is, so we just start
  67 # writing from a 64 kB boundary, which should always be aligned.
  68 offset=$((1 * 1024 * 1024 - 64 * 1024))
  69 $QEMU_IO -c "w $offset $((size - offset))" "$TEST_IMG" | _filter_qemu_io
  70 $QEMU_IMG map --output=json --image-opts \
  71     "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \
  72     | _filter_qemu_img_map
  73
  74 # Resize it and check again -- contrary to 221, we may not get partial
  75 # sectors here, so there should be only two areas (one zero, one
  76 # data).
  77 truncate --size=$size "$TEST_IMG"
  78 $QEMU_IMG map --output=json --image-opts \
  79     "driver=$IMGFMT,file.driver=file,file.filename=$TEST_IMG,cache.direct=on" \
  80     | _filter_qemu_img_map
  81
  82 # success, all done
  83 echo '*** done'
  84 rm -f $seq.full
  85 status=0