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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