tests/qemu-iotests/176

   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 # Variant of 097, which includes snapshots to test different codepath
   7 # in qcow2
   8 #
   9 # Copyright (C) 2014 Red Hat, Inc.
  10 #
  11 # This program is free software; you can redistribute it and/or modify
  12 # it under the terms of the GNU General Public License as published by
  13 # the Free Software Foundation; either version 2 of the License, or
  14 # (at your option) any later version.
  15 #
  16 # This program is distributed in the hope that it will be useful,
  17 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 # GNU General Public License for more details.
  20 #
  21 # You should have received a copy of the GNU General Public License
  22 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 #
  24
  25 # creator
  26 owner=mreitz@redhat.com
  27
  28 seq="$(basename $0)"
  29 echo "QA output created by $seq"
  30
  31 here="$PWD"
  32 status=1        # failure is the default!
  33
  34 _cleanup()
  35 {
  36     _cleanup_test_img
  37     _rm_test_img "$TEST_IMG.itmd"
  38 }
  39 trap "_cleanup; exit \$status" 0 1 2 3 15
  40
  41 # get standard environment, filters and checks
  42 . ./common.rc
  43 . ./common.filter
  44 . ./common.pattern
  45
  46 # Any format supporting backing files and bdrv_make_empty
  47 _supported_fmt qcow2
  48 _supported_proto file
  49 _supported_os Linux
  50
  51
  52 # Four passes:
  53 #  0: Two-layer backing chain, commit to upper backing file (implicitly)
  54 #     (in this case, the top image will be emptied)
  55 #  1: Two-layer backing chain, commit to upper backing file (explicitly)
  56 #     (in this case, the top image will implicitly stay unchanged)
  57 #  2: Two-layer backing chain, commit to upper backing file (implicitly with -d)
  58 #     (in this case, the top image will explicitly stay unchanged)
  59 #  3: Two-layer backing chain, commit to lower backing file
  60 #     (in this case, the top image will implicitly stay unchanged)
  61 #
  62 # 020 already tests committing, so this only tests whether image chains are
  63 # working properly and that all images above the base are emptied; therefore,
  64 # no complicated patterns are necessary.  Check near the 2G mark, as qcow2
  65 # has been buggy at that boundary in the past.
  66 for i in 0 1 2 3; do
  67
  68 echo
  69 echo "=== Test pass $i ==="
  70 echo
  71
  72 len=$((2100 * 1024 * 1024 + 512)) # larger than 2G, and not cluster aligned
  73 TEST_IMG="$TEST_IMG.base" _make_test_img $len
  74 TEST_IMG="$TEST_IMG.itmd" _make_test_img -b "$TEST_IMG.base" $len
  75 _make_test_img -b "$TEST_IMG.itmd" $len
  76 $QEMU_IMG snapshot -c snap "$TEST_IMG"
  77
  78 $QEMU_IO -c "write -P 1 0x7ffd0000 192k" "$TEST_IMG.base" | _filter_qemu_io
  79 $QEMU_IO -c "write -P 2 0x7ffe0000 128k" "$TEST_IMG.itmd" | _filter_qemu_io
  80 $QEMU_IO -c "write -P 3 0x7fff0000 64k" "$TEST_IMG" | _filter_qemu_io
  81 $QEMU_IO -c "write -P 4 $(($len - 512)) 512" "$TEST_IMG" | _filter_qemu_io
  82
  83 if [ $i -lt 3 ]; then
  84     if [ $i == 0 ]; then
  85         # -b "$TEST_IMG.itmd" should be the default (that is, committing to the
  86         # first backing file in the chain)
  87         $QEMU_IMG commit "$TEST_IMG"
  88     elif [ $i == 1 ]; then
  89         # explicitly specify the commit target (this should imply -d)
  90         $QEMU_IMG commit -b "$TEST_IMG.itmd" "$TEST_IMG"
  91     else
  92         # do not explicitly specify the commit target, but use -d to leave the
  93         # top image unchanged
  94         $QEMU_IMG commit -d "$TEST_IMG"
  95     fi
  96
  97     # Bottom should be unchanged
  98     $QEMU_IO -c 'read -P 1 0x7ffd0000 192k' "$TEST_IMG.base" | _filter_qemu_io
  99     $QEMU_IO -c "read -P 0 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io
 100
 101     # Intermediate should contain changes from top
 102     $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io
 103     $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io
 104     $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.itmd" | _filter_qemu_io
 105     $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.itmd" | _filter_qemu_io
 106
 107     # And in pass 0, the top image should be empty, whereas in both other passes
 108     # it should be unchanged (which is both checked by qemu-img map)
 109 else
 110     $QEMU_IMG commit -b "$TEST_IMG.base" "$TEST_IMG"
 111
 112     # Bottom should contain all changes
 113     $QEMU_IO -c 'read -P 1 0x7ffd0000 64k' "$TEST_IMG.base" | _filter_qemu_io
 114     $QEMU_IO -c 'read -P 2 0x7ffe0000 64k' "$TEST_IMG.base" | _filter_qemu_io
 115     $QEMU_IO -c 'read -P 3 0x7fff0000 64k' "$TEST_IMG.base" | _filter_qemu_io
 116     $QEMU_IO -c "read -P 4 $((len - 512)) 512" "$TEST_IMG.base" | _filter_qemu_io
 117
 118     # Both top and intermediate should be unchanged
 119 fi
 120
 121 $QEMU_IMG map "$TEST_IMG.base" | _filter_qemu_img_map
 122 $QEMU_IMG map "$TEST_IMG.itmd" | _filter_qemu_img_map
 123 $QEMU_IMG map "$TEST_IMG" | _filter_qemu_img_map
 124
 125 done
 126
 127
 128 # success, all done
 129 echo "*** done"
 130 rm -f $seq.full
 131 status=0