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 status=1        # failure is the default!
  30
  31 _cleanup()
  32 {
  33     _cleanup_test_img
  34     _rm_test_img "$TEST_IMG.itmd"
  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 and bdrv_make_empty
  44 _supported_fmt qcow qcow2
  45 _supported_proto file
  46 _supported_os Linux
  47
  48
  49 # Four main passes:
  50 #  0: Two-layer backing chain, commit to upper backing file (implicitly)
  51 #     (in this case, the top image will be emptied)
  52 #  1: Two-layer backing chain, commit to upper backing file (explicitly)
  53 #     (in this case, the top image will implicitly stay unchanged)
  54 #  2: Two-layer backing chain, commit to upper backing file (implicitly with -d)
  55 #     (in this case, the top image will explicitly stay unchanged)
  56 #  3: Two-layer backing chain, commit to lower backing file
  57 #     (in this case, the top image will implicitly stay unchanged)
  58 #
  59 # 020 already tests committing, so this only tests whether image chains are
  60 # working properly and that all images above the base are emptied; therefore,
  61 # no complicated patterns are necessary.  Check near the 2G mark, as qcow2
  62 # has been buggy at that boundary in the past.
  63 for i in 0 1 2 3; do
  64
  65 echo
  66 echo "=== Test pass $i ==="
  67 echo
  68
  69 len=$((2100 * 1024 * 1024 + 512)) # larger than 2G, and not cluster aligned
  70 TEST_IMG="$TEST_IMG.base" _make_test_img $len
  71 TEST_IMG="$TEST_IMG.itmd" _make_test_img -b "$TEST_IMG.base" $len
  72 _make_test_img -b "$TEST_IMG.itmd" $len
  73
  74 $QEMU_IO -c "write -P 1 0x7ffd0000 192k" "$TEST_IMG.base" | _filter_qemu_io
  75 $QEMU_IO -c "write -P 2 0x7ffe0000 128k" "$TEST_IMG.itmd" | _filter_qemu_io
  76 $QEMU_IO -c "write -P 3 0x7fff0000 64k" "$TEST_IMG" | _filter_qemu_io
  77 $QEMU_IO -c "write -P 4 $(($len - 512)) 512" "$TEST_IMG" | _filter_qemu_io
  78
  79 if [ $i -lt 3 ]; then
  80     if [ $i == 0 ]; then
  81         # -b "$TEST_IMG.itmd" should be the default (that is, committing to the
  82         # first backing file in the chain)
  83         $QEMU_IMG commit "$TEST_IMG"
  84     elif [ $i == 1 ]; then
  85         # explicitly specify the commit target (this should imply -d)
  86         $QEMU_IMG commit -b "$TEST_IMG.itmd" "$TEST_IMG"
  87     else
  88         # do not explicitly specify the commit target, but use -d to leave the
  89         # top image unchanged
  90         $QEMU_IMG commit -d "$TEST_IMG"
  91     fi
  92
  93     # Bottom should be unchanged
  94     $QEMU_IO -c 'read -P 1 0x7ffd0000 192k' "$TEST_IMG.base" | _filter_qemu_io
  95     $QEMU_IO -c "read -P 0 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io
  96
  97     # Intermediate should contain changes from top
  98     $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io
  99     $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io
 100     $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io
 101     $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.itmd" | _filter_qemu_io
 102
 103     # And in pass 0, the top image should be empty, whereas in both other passes
 104     # it should be unchanged (which is both checked by qemu-img map)
 105 else
 106     $QEMU_IMG commit -b "$TEST_IMG.base" "$TEST_IMG"
 107
 108     # Bottom should contain all changes
 109     $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.base" | _filter_qemu_io
 110     $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.base" | _filter_qemu_io
 111     $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.base" | _filter_qemu_io
 112     $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io
 113
 114     # Both top and intermediate should be unchanged
 115 fi
 116
 117 $QEMU_IMG map "$TEST_IMG.base" | _filter_qemu_img_map
 118 $QEMU_IMG map "$TEST_IMG.itmd" | _filter_qemu_img_map
 119 $QEMU_IMG map "$TEST_IMG" | _filter_qemu_img_map
 120
 121 done
 122
 123
 124 # success, all done
 125 echo "*** done"
 126 rm -f $seq.full
 127 status=0