tests/qemu-iotests/314

   1 #!/usr/bin/env bash
   2 # group: rw backing auto quick
   3 #
   4 # Test qemu-img rebase with compression
   5 #
   6 # Copyright (c) 2023 Virtuozzo International GmbH.
   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=andrey.drobyshev@virtuozzo.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.base"
  34     _rm_test_img "$TEST_IMG.itmd"
  35 }
  36 trap "_cleanup; exit \$status" 0 1 2 3 15
  37
  38 # get standard environment, filters and checks
  39 . ./common.rc
  40 . ./common.filter
  41
  42 _supported_fmt qcow2
  43 _supported_proto file
  44 _supported_os Linux
  45
  46 # Want the size divisible by 2 and 3
  47 size=$(( 48 * 1024 * 1024 ))
  48 half_size=$(( size / 2 ))
  49 third_size=$(( size / 3 ))
  50
  51 # 1. "qemu-img rebase -c" should refuse working with any format which doesn't
  52 # support compression.  We only check "-f raw" here.
  53 echo
  54 echo "=== Testing compressed rebase format compatibility ==="
  55 echo
  56
  57 $QEMU_IMG create -f raw "$TEST_IMG" "$size" | _filter_img_create
  58 $QEMU_IMG rebase -c -f raw -b "" "$TEST_IMG"
  59
  60 # 2. Write the 1st half of $size to backing file (compressed), 2nd half -- to
  61 # the top image (also compressed).  Rebase the top image onto no backing file,
  62 # with compression (i.e. "qemu-img -c -b ''").  Check that the resulting image
  63 # has the written data preserved, and "qemu-img check" reports 100% clusters
  64 # as compressed.
  65 echo
  66 echo "=== Testing rebase with compression onto no backing file ==="
  67 echo
  68
  69 TEST_IMG="$TEST_IMG.base" _make_test_img $size
  70 _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $size
  71
  72 $QEMU_IO -c "write -c -P 0xaa 0 $half_size" "$TEST_IMG.base" | _filter_qemu_io
  73 $QEMU_IO -c "write -c -P 0xbb $half_size $half_size" "$TEST_IMG" \
  74     | _filter_qemu_io
  75
  76 $QEMU_IMG rebase -c -f $IMGFMT -b "" "$TEST_IMG"
  77
  78 $QEMU_IO -c "read -P 0xaa 0 $half_size" "$TEST_IMG" | _filter_qemu_io
  79 $QEMU_IO -c "read -P 0xbb $half_size $half_size" "$TEST_IMG" | _filter_qemu_io
  80
  81 $QEMU_IMG check "$TEST_IMG" | _filter_testdir
  82
  83 # 3. Same as the previous one, but with raw backing file (hence write to
  84 # the backing is uncompressed).
  85 echo
  86 echo "=== Testing rebase with compression with raw backing file ==="
  87 echo
  88
  89 $QEMU_IMG create -f raw "$TEST_IMG.base" "$half_size" | _filter_img_create
  90 _make_test_img -b "$TEST_IMG.base" -F raw $size
  91
  92 $QEMU_IO -f raw -c "write -P 0xaa 0 $half_size" "$TEST_IMG.base" \
  93     | _filter_qemu_io
  94 $QEMU_IO -c "write -c -P 0xbb $half_size $half_size" \
  95     "$TEST_IMG" | _filter_qemu_io
  96
  97 $QEMU_IMG rebase -c -f $IMGFMT -b "" "$TEST_IMG"
  98
  99 $QEMU_IO -c "read -P 0xaa 0 $half_size" "$TEST_IMG" | _filter_qemu_io
 100 $QEMU_IO -c "read -P 0xbb $half_size $half_size" "$TEST_IMG" | _filter_qemu_io
 101
 102 $QEMU_IMG check "$TEST_IMG" | _filter_testdir
 103
 104 # 4. Create a backing chain base<--itmd<--img, filling 1st, 2nd and 3rd
 105 # thirds of them, respectively (with compression).  Rebase img onto base,
 106 # effectively deleting itmd from the chain, and check that written data is
 107 # preserved in the resulting image.  Also check that "qemu-img check" reports
 108 # 100% clusters as compressed.
 109 echo
 110 echo "=== Testing compressed rebase removing single delta from the chain ==="
 111 echo
 112
 113 TEST_IMG="$TEST_IMG.base" _make_test_img $size
 114 TEST_IMG="$TEST_IMG.itmd" _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $size
 115 _make_test_img -b "$TEST_IMG.itmd" -F $IMGFMT $size
 116
 117 $QEMU_IO -c "write -c -P 0xaa 0 $third_size" \
 118     "$TEST_IMG.base" | _filter_qemu_io
 119 $QEMU_IO -c "write -c -P 0xbb $third_size $third_size" \
 120     "$TEST_IMG.itmd" | _filter_qemu_io
 121 $QEMU_IO -c "write -c -P 0xcc $((third_size * 2 )) $third_size" \
 122     "$TEST_IMG" | _filter_qemu_io
 123
 124 $QEMU_IMG rebase -c -f $IMGFMT -b "$TEST_IMG.base" -F $IMGFMT "$TEST_IMG"
 125
 126 $QEMU_IO -c "read -P 0xaa 0 $third_size" "$TEST_IMG" | _filter_qemu_io
 127 $QEMU_IO -c "read -P 0xbb $third_size $third_size" \
 128     "$TEST_IMG" | _filter_qemu_io
 129 $QEMU_IO -c "read -P 0xcc $(( third_size * 2 )) $third_size" \
 130     "$TEST_IMG" | _filter_qemu_io
 131
 132 $QEMU_IMG check "$TEST_IMG" | _filter_testdir
 133
 134 # 5. Create one-cluster backing and overlay images, and fill only the first
 135 # (half - 1) bytes of the backing with data (uncompressed).  Rebase the
 136 # overlay onto no backing file with compression.  Check that data is still
 137 # read correctly, and that cluster is now really compressed ("qemu-img check"
 138 # reports 100% clusters as compressed.
 139 echo
 140 echo "=== Testing compressed rebase with unaligned unmerged data ==="
 141 echo
 142
 143 CLUSTER_SIZE=65536
 144
 145 TEST_IMG="$TEST_IMG.base" _make_test_img $CLUSTER_SIZE
 146 _make_test_img -b "$TEST_IMG.base" -F $IMGFMT $CLUSTER_SIZE
 147
 148 $QEMU_IO -c "write -P 0xaa 0 $(( CLUSTER_SIZE / 2 - 1 ))" $TEST_IMG.base \
 149     | _filter_qemu_io
 150
 151 $QEMU_IMG rebase -c -f $IMGFMT -b "" "$TEST_IMG"
 152
 153 $QEMU_IO -c "read -P 0xaa 0 $(( CLUSTER_SIZE / 2 - 1 ))" "$TEST_IMG" \
 154     | _filter_qemu_io
 155 $QEMU_IO -c \
 156     "read -P 0x00 $(( CLUSTER_SIZE / 2 - 1 )) $(( CLUSTER_SIZE / 2 + 1 ))" \
 157     "$TEST_IMG" | _filter_qemu_io
 158
 159 $QEMU_IMG check "$TEST_IMG" | _filter_testdir
 160
 161 # success, all done
 162 echo
 163 echo '*** done'
 164 rm -f $seq.full
 165 status=0