tests/qemu-iotests/097

   1 #!/bin/bash
   2 #
   3 # Commit changes into backing chains and empty the top image if the
   4 # backing image is not explicitly specified
   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 $seq"
  27
  28 here="$PWD"
  29 tmp=/tmp/$$
  30 status=1        # failure is the default!
  31
  32 _cleanup()
  33 {
  34     _cleanup_test_img
  35     _rm_test_img "$TEST_IMG.itmd"
  36 }
  37 trap "_cleanup; exit \$status" 0 1 2 3 15
  38
  39 # get standard environment, filters and checks
  40 . ./common.rc
  41 . ./common.filter
  42 . ./common.pattern
  43
  44 # Any format supporting backing files and bdrv_make_empty
  45 _supported_fmt qcow qcow2
  46 _supported_proto file
  47 _supported_os Linux
  48
  49
  50 # Four passes:
  51 #  0: Two-layer backing chain, commit to upper backing file (implicitly)
  52 #     (in this case, the top image will be emptied)
  53 #  1: Two-layer backing chain, commit to upper backing file (explicitly)
  54 #     (in this case, the top image will implicitly stay unchanged)
  55 #  2: Two-layer backing chain, commit to upper backing file (implicitly with -d)
  56 #     (in this case, the top image will explicitly stay unchanged)
  57 #  3: Two-layer backing chain, commit to lower backing file
  58 #     (in this case, the top image will implicitly stay unchanged)
  59 #
  60 # 020 already tests committing, so this only tests whether image chains are
  61 # working properly and that all images above the base are emptied; therefore,
  62 # no complicated patterns are necessary
  63 for i in 0 1 2 3; do
  64
  65 echo
  66 echo "=== Test pass $i ==="
  67 echo
  68
  69 TEST_IMG="$TEST_IMG.base" _make_test_img 64M
  70 TEST_IMG="$TEST_IMG.itmd" _make_test_img -b "$TEST_IMG.base" 64M
  71 _make_test_img -b "$TEST_IMG.itmd" 64M
  72
  73 $QEMU_IO -c 'write -P 1 0 192k' "$TEST_IMG.base" | _filter_qemu_io
  74 $QEMU_IO -c 'write -P 2 64k 128k' "$TEST_IMG.itmd" | _filter_qemu_io
  75 $QEMU_IO -c 'write -P 3 128k 64k' "$TEST_IMG" | _filter_qemu_io
  76
  77 if [ $i -lt 3 ]; then
  78     if [ $i == 0 ]; then
  79         # -b "$TEST_IMG.itmd" should be the default (that is, committing to the
  80         # first backing file in the chain)
  81         $QEMU_IMG commit "$TEST_IMG"
  82     elif [ $i == 1 ]; then
  83         # explicitly specify the commit target (this should imply -d)
  84         $QEMU_IMG commit -b "$TEST_IMG.itmd" "$TEST_IMG"
  85     else
  86         # do not explicitly specify the commit target, but use -d to leave the
  87         # top image unchanged
  88         $QEMU_IMG commit -d "$TEST_IMG"
  89     fi
  90
  91     # Bottom should be unchanged
  92     $QEMU_IO -c 'read -P 1 0 192k' "$TEST_IMG.base" | _filter_qemu_io
  93
  94     # Intermediate should contain changes from top
  95     $QEMU_IO -c 'read -P 1 0 64k' "$TEST_IMG.itmd" | _filter_qemu_io
  96     $QEMU_IO -c 'read -P 2 64k 64k' "$TEST_IMG.itmd" | _filter_qemu_io
  97     $QEMU_IO -c 'read -P 3 128k 64k' "$TEST_IMG.itmd" | _filter_qemu_io
  98
  99     # And in pass 0, the top image should be empty, whereas in both other passes
 100     # it should be unchanged (which is both checked by qemu-img map)
 101 else
 102     $QEMU_IMG commit -b "$TEST_IMG.base" "$TEST_IMG"
 103
 104     # Bottom should contain all changes
 105     $QEMU_IO -c 'read -P 1 0 64k' "$TEST_IMG.base" | _filter_qemu_io
 106     $QEMU_IO -c 'read -P 2 64k 64k' "$TEST_IMG.base" | _filter_qemu_io
 107     $QEMU_IO -c 'read -P 3 128k 64k' "$TEST_IMG.base" | _filter_qemu_io
 108
 109     # Both top and intermediate should be unchanged
 110 fi
 111
 112 $QEMU_IMG map "$TEST_IMG.base" | _filter_qemu_img_map
 113 $QEMU_IMG map "$TEST_IMG.itmd" | _filter_qemu_img_map
 114 $QEMU_IMG map "$TEST_IMG" | _filter_qemu_img_map
 115
 116 done
 117
 118
 119 # success, all done
 120 echo "*** done"
 121 rm -f $seq.full
 122 status=0