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 $seq"
  26
  27 status=1        # failure is the default!
  28
  29 _cleanup()
  30 {
  31     _cleanup_test_img
  32     _rm_test_img "$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                      "subformat=twoGbMaxExtentSparse"
  45
  46 TEST_IMG_REL=$(basename "$TEST_IMG")
  47
  48 echo
  49 echo '=== Reconstructable filename ==='
  50 echo
  51
  52 TEST_IMG="$TEST_IMG.base" _make_test_img 64M
  53 _make_test_img -b "$TEST_IMG_REL.base" -F $IMGFMT 64M
  54 # qemu should be able to reconstruct the filename, so relative backing names
  55 # should work
  56 # (We have to filter the backing file format because vmdk always
  57 # reports it (as vmdk), whereas other image formats would do so only
  58 # with the backing_fmt creation option, which neither vmdk nor qcow
  59 # support)
  60 TEST_IMG="json:{'driver':'$IMGFMT','file':{'driver':'file','filename':'$TEST_IMG'}}" \
  61     _img_info | _filter_img_info | grep -v 'backing file format'
  62
  63 echo
  64 echo '=== Non-reconstructable filename ==='
  65 echo
  66
  67 # Across blkdebug without a config file, you cannot reconstruct filenames, so
  68 # qemu is incapable of knowing the directory of the top image from the filename
  69 # alone. However, using bdrv_dirname(), it should still work.
  70 # (Filter out the json:{} filename so this test works with external data files)
  71 TEST_IMG="json:{
  72     'driver': '$IMGFMT',
  73     'file': {
  74         'driver': 'blkdebug',
  75         'image': {
  76             'driver': 'file',
  77             'filename': '$TEST_IMG'
  78         },
  79         'set-state': [
  80             {
  81                 'event': 'read_aio',
  82                 'new_state': 42
  83             }
  84         ]
  85     }
  86 }" _img_info | _filter_img_info | grep -v 'backing file format' \
  87     | _filter_json_filename
  88
  89 echo
  90 echo '=== Backing name is always relative to the backed image ==='
  91 echo
  92
  93 # omit the image size; it should work anyway
  94 _make_test_img -b "$TEST_IMG_REL.base" -F $IMGFMT
  95
  96 echo
  97 echo '=== Nodes without a common directory ==='
  98 echo
  99
 100 cp "$TEST_IMG" "$TEST_IMG.copy"
 101
 102 # Should inform us that the actual path of the backing file cannot be determined
 103 TEST_IMG="json:{
 104     'driver': '$IMGFMT',
 105     'file': {
 106         'driver': 'quorum',
 107         'vote-threshold': 1,
 108         'children': [
 109             {
 110                 'driver': 'file',
 111                 'filename': '$TEST_IMG'
 112             },
 113             {
 114                 'driver': 'file',
 115                 'filename': '$TEST_IMG.copy'
 116             }
 117         ]
 118     }
 119 }" _img_info | _filter_img_info | grep -v 'backing file format' \
 120     | _filter_json_filename
 121
 122
 123 # success, all done
 124 echo '*** done'
 125 rm -f $seq.full
 126 status=0