tests/qemu-iotests/251

   1 #!/usr/bin/env bash
   2 #
   3 # Test qemu-img convert --salvage
   4 #
   5 # Copyright (C) 2019 Red Hat, Inc.
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 2 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 #
  20
  21 # creator
  22 owner=mreitz@redhat.com
  23
  24 seq=$(basename $0)
  25 echo "QA output created by $seq"
  26
  27 status=1        # failure is the default!
  28
  29 _cleanup()
  30 {
  31     _cleanup_test_img
  32 }
  33 trap "_cleanup; exit \$status" 0 1 2 3 15
  34
  35 # get standard environment, filters and checks
  36 . ./common.rc
  37 . ./common.filter
  38 . ./common.qemu
  39
  40 _supported_fmt generic
  41 _supported_proto file
  42 _supported_os Linux
  43
  44 if [ "$IMGOPTSSYNTAX" = "true" ]; then
  45     # We use json:{} filenames here, so we cannot work with additional options.
  46     _unsupported_fmt $IMGFMT
  47 else
  48     # With VDI, the output is ordered differently.  Just disable it.
  49     _unsupported_fmt vdi
  50 fi
  51
  52
  53 TEST_IMG="$TEST_IMG.orig" _make_test_img 64M
  54
  55 $QEMU_IO -c 'write -P 42 0 64M' "$TEST_IMG.orig" | _filter_qemu_io
  56
  57
  58 sector_size=512
  59
  60 # Offsets on which to fail block-status.  Keep in ascending order so
  61 # the indexing done by _filter_offsets will appear in ascending order
  62 # in the output as well.
  63 status_fail_offsets="$((16 * 1024 * 1024 + 8192))
  64                      $((33 * 1024 * 1024 + 512))"
  65
  66 # Offsets on which to fail reads.  Keep in ascending order for the
  67 # same reason.
  68 # The second element is shared with $status_fail_offsets on purpose.
  69 # Starting with the third element, we test what happens when a
  70 # continuous range of sectors is inaccessible.
  71 read_fail_offsets="$((32 * 1024 * 1024 - 65536))
  72                    $((33 * 1024 * 1024 + 512))
  73                    $(seq $((34 * 1024 * 1024)) $sector_size \
  74                          $((34 * 1024 * 1024 + 4096 - $sector_size)))"
  75
  76
  77 # blkdebug must be above the format layer so it can intercept all
  78 # block-status events
  79 source_img="json:{'driver': 'blkdebug',
  80                   'image': {
  81                       'driver': '$IMGFMT',
  82                       'file': {
  83                           'driver': 'file',
  84                           'filename': '$TEST_IMG.orig'
  85                       }
  86                   },
  87                   'inject-error': ["
  88
  89 for ofs in $status_fail_offsets
  90 do
  91     source_img+="{ 'event': 'none',
  92                    'iotype': 'block-status',
  93                    'errno': 5,
  94                    'sector': $((ofs / sector_size)) },"
  95 done
  96
  97 for ofs in $read_fail_offsets
  98 do
  99     source_img+="{ 'event': 'none',
 100                    'iotype': 'read',
 101                    'errno': 5,
 102                    'sector': $((ofs / sector_size)) },"
 103 done
 104
 105 # Remove the trailing comma and terminate @inject-error and json:{}
 106 source_img="${source_img%,} ] }"
 107
 108
 109 echo
 110
 111
 112 _filter_offsets() {
 113     filters=
 114
 115     index=0
 116     for ofs in $1
 117     do
 118         filters+=" -e s/$ofs/status_fail_offset_$index/"
 119         index=$((index + 1))
 120     done
 121
 122     index=0
 123     for ofs in $2
 124     do
 125         filters+=" -e s/$ofs/read_fail_offset_$index/"
 126         index=$((index + 1))
 127     done
 128
 129     sed $filters
 130 }
 131
 132 # While determining the number of allocated sectors in the input
 133 # image, we should see one block status warning per element of
 134 # $status_fail_offsets.
 135 #
 136 # Then, the image is read.  Since the block status is queried in
 137 # basically the same way, the same warnings as in the previous step
 138 # should reappear.  Interleaved with those we should see a read
 139 # warning per element of $read_fail_offsets.
 140 # Note that $read_fail_offsets and $status_fail_offsets share an
 141 # element (read_fail_offset_1 == status_fail_offset_1), so
 142 # "status_fail_offset_1" in the output is the same as
 143 # "read_fail_offset_1".
 144 $QEMU_IMG convert --salvage "$source_img" "$TEST_IMG" 2>&1 \
 145     | _filter_offsets "$status_fail_offsets" "$read_fail_offsets"
 146
 147 echo
 148
 149 # The offsets where the block status could not be determined should
 150 # have been treated as containing data and thus should be correct in
 151 # the output image.
 152 # The offsets where reading failed altogether should be 0.  Make them
 153 # 0 in the input image, too, so we can compare both images.
 154 for ofs in $read_fail_offsets
 155 do
 156     $QEMU_IO -c "write -z $ofs $sector_size" "$TEST_IMG.orig" \
 157         | _filter_qemu_io \
 158         | _filter_offsets '' "$read_fail_offsets"
 159 done
 160
 161 echo
 162
 163 # These should be equal now.
 164 $QEMU_IMG compare "$TEST_IMG.orig" "$TEST_IMG"
 165
 166
 167 # success, all done
 168 echo "*** done"
 169 rm -f $seq.full
 170 status=0