tests/qemu-iotests/020

   1 #!/usr/bin/env bash
   2 #
   3 # Commit changes to backing file
   4 #
   5 # Copyright (C) 2009 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=kwolf@redhat.com
  23
  24 seq=`basename $0`
  25 echo "QA output created by $seq"
  26
  27 status=1        # failure is the default!
  28
  29 _cleanup()
  30 {
  31     _cleanup_test_img
  32     _rm_test_img "$TEST_IMG.base"
  33     _rm_test_img "$TEST_IMG.orig"
  34 }
  35 trap "_cleanup; exit \$status" 0 1 2 3 15
  36
  37 # get standard environment, filters and checks
  38 . ./common.rc
  39 . ./common.filter
  40 . ./common.pattern
  41
  42 # Any format supporting backing files
  43 _supported_fmt qcow qcow2 vmdk qed
  44 _supported_proto file
  45 _unsupported_imgopts "subformat=monolithicFlat" \
  46                      "subformat=twoGbMaxExtentFlat" \
  47                      "subformat=twoGbMaxExtentSparse" \
  48                      "subformat=streamOptimized"
  49
  50 TEST_OFFSETS="0 4294967296"
  51
  52 TEST_IMG_SAVE="$TEST_IMG"
  53 TEST_IMG="$TEST_IMG.base"
  54
  55 _make_test_img 6G
  56
  57 echo "Filling base image"
  58 echo
  59
  60 for offset in $TEST_OFFSETS; do
  61     # Some clusters with alternating backing file/image file reads
  62     io writev $(( offset )) 512 1024 64
  63
  64     # Complete backing clusters
  65     io writev $(( offset  + 64 * 1024))  65536 65536 1
  66 done
  67 _check_test_img
  68
  69 echo "Creating test image with backing file"
  70 echo
  71
  72 TEST_IMG="$TEST_IMG_SAVE"
  73 _make_test_img -b "$TEST_IMG.base" -F $IMGFMT 6G
  74
  75 echo "Filling test image"
  76 echo
  77
  78 for offset in $TEST_OFFSETS; do
  79     # Some clusters with alternating backing file/image file reads
  80     io writev $(( offset + 512 )) 512 1024 64
  81
  82     # Complete test image clusters
  83     io writev $(( offset + 64 * 1024 + 65536))  65536 65536 1
  84 done
  85 _check_test_img
  86
  87 $QEMU_IMG commit "$TEST_IMG"
  88 TEST_IMG="$TEST_IMG.base"
  89
  90 echo "Reading from the backing file"
  91 echo
  92
  93 for offset in $TEST_OFFSETS; do
  94     # Some clusters with alternating backing file/image file reads
  95     io readv $(( offset )) 512 1024 64
  96     io readv $(( offset + 512 )) 512 1024 64
  97
  98     # Complete test image clusters
  99     io readv $(( offset  + 64 * 1024))  65536 65536 1
 100     io readv $(( offset + 64 * 1024 + 65536))  65536 65536 1
 101
 102     # Empty sectors
 103     io_zero readv $(( offset + 64 * 1024 + 65536 * 4 )) 65536 65536 1
 104 done
 105 _check_test_img
 106 _cleanup
 107 TEST_IMG=$TEST_IMG_SAVE
 108
 109 echo
 110 echo 'Testing failing commit'
 111 echo
 112
 113 TEST_IMG="$TEST_IMG.base" _make_test_img 1M
 114
 115 # Create an image with a null backing file to which committing will fail (with
 116 # ENOSPC so we can distinguish the result from some generic EIO which may be
 117 # generated anywhere in the block layer)
 118 backing="json:{'driver': '$IMGFMT',
 119                'file': {
 120                    'driver': 'blkdebug',
 121                    'inject-error': [{
 122                        'event': 'write_aio',
 123                        'errno': 28,
 124                        'once': true
 125                    }],
 126                    'image': {
 127                        'driver': 'file',
 128                        'filename': '$TEST_IMG.base'
 129                    }}}"
 130
 131 # Filter out newlines and collapse spaces
 132 backing=$(echo "$backing" | tr -d '\n' | tr -s ' ')
 133
 134 _make_test_img -b "$backing" -F $IMGFMT
 135
 136 # Just write anything so committing will not be a no-op
 137 $QEMU_IO -c 'writev 0 64k' "$TEST_IMG" | _filter_qemu_io
 138
 139 $QEMU_IMG commit "$TEST_IMG"
 140 _cleanup
 141
 142 # success, all done
 143 echo "*** done"
 144 rm -f $seq.full
 145 status=0