tests/qemu-iotests/312

   1 #!/usr/bin/env bash
   2 # group: rw quick
   3 #
   4 # Test drive-mirror with quorum
   5 #
   6 # The goal of this test is to check how the quorum driver reports
   7 # regions that are known to read as zeroes (BDRV_BLOCK_ZERO). The idea
   8 # is that drive-mirror will try the efficient representation of zeroes
   9 # in the destination image instead of writing actual zeroes.
  10 #
  11 # Copyright (C) 2020 Igalia, S.L.
  12 # Author: Alberto Garcia <berto@igalia.com>
  13 #
  14 # This program is free software; you can redistribute it and/or modify
  15 # it under the terms of the GNU General Public License as published by
  16 # the Free Software Foundation; either version 2 of the License, or
  17 # (at your option) any later version.
  18 #
  19 # This program is distributed in the hope that it will be useful,
  20 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 # GNU General Public License for more details.
  23 #
  24 # You should have received a copy of the GNU General Public License
  25 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  26 #
  27
  28 # creator
  29 owner=berto@igalia.com
  30
  31 seq=`basename $0`
  32 echo "QA output created by $seq"
  33
  34 status=1        # failure is the default!
  35
  36 _cleanup()
  37 {
  38     _rm_test_img "$TEST_IMG.0"
  39     _rm_test_img "$TEST_IMG.1"
  40     _rm_test_img "$TEST_IMG.2"
  41     _rm_test_img "$TEST_IMG.3"
  42     _cleanup_qemu
  43 }
  44 trap "_cleanup; exit \$status" 0 1 2 3 15
  45
  46 # get standard environment, filters and checks
  47 . ./common.rc
  48 . ./common.filter
  49 . ./common.qemu
  50
  51 _supported_fmt qcow2
  52 _supported_proto file
  53 _supported_os Linux
  54 _unsupported_imgopts cluster_size data_file
  55 _require_drivers quorum
  56
  57 echo
  58 echo '### Create all images' # three source (quorum), one destination
  59 echo
  60 TEST_IMG="$TEST_IMG.0" _make_test_img -o cluster_size=64k 10M
  61 TEST_IMG="$TEST_IMG.1" _make_test_img -o cluster_size=64k 10M
  62 TEST_IMG="$TEST_IMG.2" _make_test_img -o cluster_size=64k 10M
  63 TEST_IMG="$TEST_IMG.3" _make_test_img -o cluster_size=64k 10M
  64
  65 quorum="driver=raw,file.driver=quorum,file.vote-threshold=2"
  66 quorum="$quorum,file.children.0.file.filename=$TEST_IMG.0"
  67 quorum="$quorum,file.children.1.file.filename=$TEST_IMG.1"
  68 quorum="$quorum,file.children.2.file.filename=$TEST_IMG.2"
  69 quorum="$quorum,file.children.0.driver=$IMGFMT"
  70 quorum="$quorum,file.children.1.driver=$IMGFMT"
  71 quorum="$quorum,file.children.2.driver=$IMGFMT"
  72
  73 echo
  74 echo '### Output of qemu-img map (empty quorum)'
  75 echo
  76 $QEMU_IMG map --image-opts $quorum | _filter_qemu_img_map
  77
  78 # Now we write data to the quorum. All three images will read as
  79 # zeroes in all cases, but with different ways to represent them
  80 # (unallocated clusters, zero clusters, data clusters with zeroes)
  81 # that will have an effect on how the data will be mirrored and the
  82 # output of qemu-img map on the resulting image.
  83 echo
  84 echo '### Write data to the quorum'
  85 echo
  86 # Test 1: data regions surrounded by unallocated clusters.
  87 # Three data regions, the largest one (0x30000) will be picked, end result:
  88 # offset 0x10000, length 0x30000 -> data
  89 $QEMU_IO -c "write -P 0 $((0x10000)) $((0x10000))" "$TEST_IMG.0" | _filter_qemu_io
  90 $QEMU_IO -c "write -P 0 $((0x10000)) $((0x30000))" "$TEST_IMG.1" | _filter_qemu_io
  91 $QEMU_IO -c "write -P 0 $((0x10000)) $((0x20000))" "$TEST_IMG.2" | _filter_qemu_io
  92
  93 # Test 2: zero regions surrounded by data clusters.
  94 # First we allocate the data clusters.
  95 $QEMU_IO -c "open -o $quorum" -c "write -P 0 $((0x100000)) $((0x40000))" | _filter_qemu_io
  96
  97 # Three zero regions, the smallest one (0x10000) will be picked, end result:
  98 # offset 0x100000, length 0x10000 -> data
  99 # offset 0x110000, length 0x10000 -> zeroes
 100 # offset 0x120000, length 0x20000 -> data
 101 $QEMU_IO -c "write -z $((0x110000)) $((0x10000))" "$TEST_IMG.0" | _filter_qemu_io
 102 $QEMU_IO -c "write -z $((0x110000)) $((0x30000))" "$TEST_IMG.1" | _filter_qemu_io
 103 $QEMU_IO -c "write -z $((0x110000)) $((0x20000))" "$TEST_IMG.2" | _filter_qemu_io
 104
 105 # Test 3: zero clusters surrounded by unallocated clusters.
 106 # Everything reads as zeroes, no effect on the end result.
 107 $QEMU_IO -c "write -z $((0x150000)) $((0x10000))" "$TEST_IMG.0" | _filter_qemu_io
 108 $QEMU_IO -c "write -z $((0x150000)) $((0x30000))" "$TEST_IMG.1" | _filter_qemu_io
 109 $QEMU_IO -c "write -z $((0x150000)) $((0x20000))" "$TEST_IMG.2" | _filter_qemu_io
 110
 111 # Test 4: mix of data and zero clusters.
 112 # The zero region will be ignored in favor of the largest data region
 113 # (0x20000), end result:
 114 # offset 0x200000, length 0x20000 -> data
 115 $QEMU_IO -c "write -P 0 $((0x200000)) $((0x10000))" "$TEST_IMG.0" | _filter_qemu_io
 116 $QEMU_IO -c "write -z   $((0x200000)) $((0x30000))" "$TEST_IMG.1" | _filter_qemu_io
 117 $QEMU_IO -c "write -P 0 $((0x200000)) $((0x20000))" "$TEST_IMG.2" | _filter_qemu_io
 118
 119 # Test 5: write data to a region and then zeroize it, doing it
 120 # directly on the quorum device instead of the individual images.
 121 # This has no effect on the end result but proves that the quorum driver
 122 # supports 'write -z'.
 123 $QEMU_IO -c "open -o $quorum" -c "write -P 1 $((0x250000)) $((0x10000))" | _filter_qemu_io
 124 # Verify the data that we just wrote
 125 $QEMU_IO -c "open -o $quorum" -c "read -P 1 $((0x250000)) $((0x10000))" | _filter_qemu_io
 126 $QEMU_IO -c "open -o $quorum" -c "write -z $((0x250000)) $((0x10000))" | _filter_qemu_io
 127 # Now it should read back as zeroes
 128 $QEMU_IO -c "open -o $quorum" -c "read -P 0 $((0x250000)) $((0x10000))" | _filter_qemu_io
 129
 130 echo
 131 echo '### Launch the drive-mirror job'
 132 echo
 133 qemu_comm_method="qmp" _launch_qemu -drive if=virtio,"$quorum"
 134 h=$QEMU_HANDLE
 135 _send_qemu_cmd $h "{ 'execute': 'qmp_capabilities' }" 'return'
 136
 137 _send_qemu_cmd $h \
 138     "{'execute': 'drive-mirror',
 139                  'arguments': {'device': 'virtio0',
 140                                'format': '$IMGFMT',
 141                                'target': '$TEST_IMG.3',
 142                                'sync':   'full',
 143                                'mode':   'existing' }}"    \
 144      "BLOCK_JOB_READY.*virtio0"
 145
 146 _send_qemu_cmd $h \
 147     "{ 'execute': 'block-job-complete',
 148        'arguments': { 'device': 'virtio0' } }" \
 149     'BLOCK_JOB_COMPLETED'
 150
 151 _send_qemu_cmd $h "{ 'execute': 'quit' }" ''
 152
 153 echo
 154 echo '### Output of qemu-img map (destination image)'
 155 echo
 156 $QEMU_IMG map "$TEST_IMG.3" | _filter_qemu_img_map
 157
 158 # success, all done
 159 echo "*** done"
 160 rm -f $seq.full
 161 status=0