tests/qemu-iotests/110

   1 #!/usr/bin/env bash
   2 #
   3 # Test case for relative backing file names in complex BDS trees
   4 #
   5 # Copyright (C) 2014 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=mreitz@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.copy"
  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
  40 # Any format supporting backing files
  41 _supported_fmt qed qcow qcow2 vmdk
  42 _supported_proto file
  43 _unsupported_imgopts "subformat=monolithicFlat" "subformat=twoGbMaxExtentFlat"
  44
  45 TEST_IMG_REL=$(basename "$TEST_IMG")
  46
  47 echo
  48 echo '=== Reconstructable filename ==='
  49 echo
  50
  51 TEST_IMG="$TEST_IMG.base" _make_test_img 64M
  52 _make_test_img -b "$TEST_IMG_REL.base" 64M
  53 # qemu should be able to reconstruct the filename, so relative backing names
  54 # should work
  55 # (We have to filter the backing file format because vmdk always
  56 # reports it (as vmdk), whereas other image formats would do so only
  57 # with the backing_fmt creation option, which neither vmdk nor qcow
  58 # support)
  59 TEST_IMG="json:{'driver':'$IMGFMT','file':{'driver':'file','filename':'$TEST_IMG'}}" \
  60     _img_info | _filter_img_info | grep -v 'backing file format'
  61
  62 echo
  63 echo '=== Non-reconstructable filename ==='
  64 echo
  65
  66 # Across blkdebug without a config file, you cannot reconstruct filenames, so
  67 # qemu is incapable of knowing the directory of the top image from the filename
  68 # alone. However, using bdrv_dirname(), it should still work.
  69 TEST_IMG="json:{
  70     'driver': '$IMGFMT',
  71     'file': {
  72         'driver': 'blkdebug',
  73         'image': {
  74             'driver': 'file',
  75             'filename': '$TEST_IMG'
  76         },
  77         'set-state': [
  78             {
  79                 'event': 'read_aio',
  80                 'new_state': 42
  81             }
  82         ]
  83     }
  84 }" _img_info | _filter_img_info | grep -v 'backing file format'
  85
  86 echo
  87 echo '=== Backing name is always relative to the backed image ==='
  88 echo
  89
  90 # omit the image size; it should work anyway
  91 _make_test_img -b "$TEST_IMG_REL.base"
  92
  93 echo
  94 echo '=== Nodes without a common directory ==='
  95 echo
  96
  97 cp "$TEST_IMG" "$TEST_IMG.copy"
  98
  99 # Should inform us that the actual path of the backing file cannot be determined
 100 TEST_IMG="json:{
 101     'driver': '$IMGFMT',
 102     'file': {
 103         'driver': 'quorum',
 104         'vote-threshold': 1,
 105         'children': [
 106             {
 107                 'driver': 'file',
 108                 'filename': '$TEST_IMG'
 109             },
 110             {
 111                 'driver': 'file',
 112                 'filename': '$TEST_IMG.copy'
 113             }
 114         ]
 115     }
 116 }" _img_info | _filter_img_info | grep -v 'backing file format'
 117
 118
 119 # success, all done
 120 echo '*** done'
 121 rm -f $seq.full
 122 status=0