tests/qemu-iotests/110

   1 #!/usr/bin/env bash
   2 # group: rw auto backing quick
   3 #
   4 # Test case for relative backing file names in complex BDS trees
   5 #
   6 # Copyright (C) 2014 Red Hat, Inc.
   7 #
   8 # This program is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 2 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 #
  21
  22 # creator
  23 owner=mreitz@redhat.com
  24
  25 seq="$(basename $0)"
  26 echo "QA output created by $seq"
  27
  28 status=1        # failure is the default!
  29
  30 _cleanup()
  31 {
  32     _cleanup_test_img
  33     _rm_test_img "$TEST_IMG.copy"
  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
  41 # Any format supporting backing files
  42 _supported_fmt qed qcow qcow2 vmdk
  43 _supported_proto file
  44 _unsupported_imgopts "subformat=monolithicFlat" "subformat=twoGbMaxExtentFlat" \
  45                      "subformat=twoGbMaxExtentSparse"
  46
  47 TEST_IMG_REL=$(basename "$TEST_IMG")
  48
  49 echo
  50 echo '=== Reconstructable filename ==='
  51 echo
  52
  53 TEST_IMG="$TEST_IMG.base" _make_test_img 64M
  54 _make_test_img -b "$TEST_IMG_REL.base" -F $IMGFMT 64M
  55 # qemu should be able to reconstruct the filename, so relative backing names
  56 # should work
  57 # (We have to filter the backing file format because vmdk always
  58 # reports it (as vmdk), whereas other image formats would do so only
  59 # with the backing_fmt creation option, which neither vmdk nor qcow
  60 # support)
  61 TEST_IMG="json:{'driver':'$IMGFMT','file':{'driver':'file','filename':'$TEST_IMG'}}" \
  62     _img_info | _filter_img_info | grep -v 'backing file format'
  63
  64 echo
  65 echo '=== Non-reconstructable filename ==='
  66 echo
  67
  68 # Across blkdebug without a config file, you cannot reconstruct filenames, so
  69 # qemu is incapable of knowing the directory of the top image from the filename
  70 # alone. However, using bdrv_dirname(), it should still work.
  71 # (Filter out the json:{} filename so this test works with external data files)
  72 TEST_IMG="json:{
  73     'driver': '$IMGFMT',
  74     'file': {
  75         'driver': 'blkdebug',
  76         'image': {
  77             'driver': 'file',
  78             'filename': '$TEST_IMG'
  79         },
  80         'set-state': [
  81             {
  82                 'event': 'read_aio',
  83                 'new_state': 42
  84             }
  85         ]
  86     }
  87 }" _img_info | _filter_img_info | grep -v 'backing file format' \
  88     | _filter_json_filename
  89
  90 echo
  91 echo '=== Backing name is always relative to the backed image ==='
  92 echo
  93
  94 # omit the image size; it should work anyway
  95 _make_test_img -b "$TEST_IMG_REL.base" -F $IMGFMT
  96
  97 echo
  98 echo '=== Nodes without a common directory ==='
  99 echo
 100
 101 cp "$TEST_IMG" "$TEST_IMG.copy"
 102
 103 # Should inform us that the actual path of the backing file cannot be determined
 104 TEST_IMG="json:{
 105     'driver': '$IMGFMT',
 106     'file': {
 107         'driver': 'quorum',
 108         'vote-threshold': 1,
 109         'children': [
 110             {
 111                 'driver': 'file',
 112                 'filename': '$TEST_IMG'
 113             },
 114             {
 115                 'driver': 'file',
 116                 'filename': '$TEST_IMG.copy'
 117             }
 118         ]
 119     }
 120 }" _img_info | _filter_img_info | grep -v 'backing file format' \
 121     | _filter_json_filename
 122
 123
 124 # success, all done
 125 echo '*** done'
 126 rm -f $seq.full
 127 status=0