tests/qemu-iotests/251

   1 #!/usr/bin/env bash
   2 # group: rw auto quick
   3 #
   4 # Test qemu-img convert --salvage
   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 # creator
  23 owner=hreitz@redhat.com
  24
  25 seq=$(basename $0)
  26 echo "QA output created by $seq"
  27
  28 status=1        # failure is the default!
  29
  30 _cleanup()
  31 {
  32     _cleanup_test_img
  33 }
  34 trap "_cleanup; exit \$status" 0 1 2 3 15
  35
  36 # get standard environment, filters and checks
  37 . ./common.rc
  38 . ./common.filter
  39 . ./common.qemu
  40
  41 _supported_fmt generic
  42 _supported_proto file
  43 _supported_os Linux
  44 _unsupported_imgopts "subformat=streamOptimized"
  45
  46 if [ "$IMGOPTSSYNTAX" = "true" ]; then
  47     # We use json:{} filenames here, so we cannot work with additional options.
  48     _unsupported_fmt $IMGFMT
  49 else
  50     # - With VDI, the output is ordered differently.  Just disable it.
  51     # - VHDX has large clusters; because qemu-img convert tries to
  52     #   align the requests to the cluster size, the output is ordered
  53     #   differently, so disable it, too.
  54     _unsupported_fmt vdi vhdx
  55 fi
  56
  57
  58 TEST_IMG="$TEST_IMG.orig" _make_test_img 64M
  59
  60 $QEMU_IO -c 'write -P 42 0 64M' "$TEST_IMG.orig" | _filter_qemu_io
  61
  62
  63 sector_size=512
  64
  65 # Offsets on which to fail block-status.  Keep in ascending order so
  66 # the indexing done by _filter_offsets will appear in ascending order
  67 # in the output as well.
  68 status_fail_offsets="$((16 * 1024 * 1024 + 8192))
  69                      $((33 * 1024 * 1024 + 512))"
  70
  71 # Offsets on which to fail reads.  Keep in ascending order for the
  72 # same reason.
  73 # The second element is shared with $status_fail_offsets on purpose.
  74 # Starting with the third element, we test what happens when a
  75 # continuous range of sectors is inaccessible.
  76 read_fail_offsets="$((32 * 1024 * 1024 - 65536))
  77                    $((33 * 1024 * 1024 + 512))
  78                    $(seq $((34 * 1024 * 1024)) $sector_size \
  79                          $((34 * 1024 * 1024 + 4096 - $sector_size)))"
  80
  81
  82 # blkdebug must be above the format layer so it can intercept all
  83 # block-status events
  84 source_img="json:{'driver': 'blkdebug',
  85                   'image': {
  86                       'driver': '$IMGFMT',
  87                       'file': {
  88                           'driver': 'file',
  89                           'filename': '$TEST_IMG.orig'
  90                       }
  91                   },
  92                   'inject-error': ["
  93
  94 for ofs in $status_fail_offsets
  95 do
  96     source_img+="{ 'event': 'none',
  97                    'iotype': 'block-status',
  98                    'errno': 5,
  99                    'sector': $((ofs / sector_size)) },"
 100 done
 101
 102 for ofs in $read_fail_offsets
 103 do
 104     source_img+="{ 'event': 'none',
 105                    'iotype': 'read',
 106                    'errno': 5,
 107                    'sector': $((ofs / sector_size)) },"
 108 done
 109
 110 # Remove the trailing comma and terminate @inject-error and json:{}
 111 source_img="${source_img%,} ] }"
 112
 113
 114 echo
 115
 116
 117 _filter_offsets() {
 118     filters=
 119
 120     index=0
 121     for ofs in $1
 122     do
 123         filters+=" -e s/$ofs/status_fail_offset_$index/"
 124         index=$((index + 1))
 125     done
 126
 127     index=0
 128     for ofs in $2
 129     do
 130         filters+=" -e s/$ofs/read_fail_offset_$index/"
 131         index=$((index + 1))
 132     done
 133
 134     sed $filters
 135 }
 136
 137 # While determining the number of allocated sectors in the input
 138 # image, we should see one block status warning per element of
 139 # $status_fail_offsets.
 140 #
 141 # Then, the image is read.  Since the block status is queried in
 142 # basically the same way, the same warnings as in the previous step
 143 # should reappear.  Interleaved with those we should see a read
 144 # warning per element of $read_fail_offsets.
 145 # Note that $read_fail_offsets and $status_fail_offsets share an
 146 # element (read_fail_offset_1 == status_fail_offset_1), so
 147 # "status_fail_offset_1" in the output is the same as
 148 # "read_fail_offset_1".
 149 $QEMU_IMG convert --salvage "$source_img" "$TEST_IMG" 2>&1 \
 150     | _filter_offsets "$status_fail_offsets" "$read_fail_offsets"
 151
 152 echo
 153
 154 # The offsets where the block status could not be determined should
 155 # have been treated as containing data and thus should be correct in
 156 # the output image.
 157 # The offsets where reading failed altogether should be 0.  Make them
 158 # 0 in the input image, too, so we can compare both images.
 159 for ofs in $read_fail_offsets
 160 do
 161     $QEMU_IO -c "write -z $ofs $sector_size" "$TEST_IMG.orig" \
 162         | _filter_qemu_io \
 163         | _filter_offsets '' "$read_fail_offsets"
 164 done
 165
 166 echo
 167
 168 # These should be equal now.
 169 $QEMU_IMG compare "$TEST_IMG.orig" "$TEST_IMG"
 170
 171
 172 # success, all done
 173 echo "*** done"
 174 rm -f $seq.full
 175 status=0