tests/qemu-iotests/020

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