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