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 "$TEST_IMG.3"
  42     _cleanup_qemu
  43 }
  44 trap "_cleanup; exit \$status" 0 1 2 3 15
  45
  46 # get standard environment, filters and checks
  47 . ./common.rc
  48 . ./common.filter
  49 . ./common.qemu
  50
  51 _supported_fmt qcow2
  52 _supported_proto file
  53 _supported_os Linux
  54 _unsupported_imgopts cluster_size data_file
  55
  56 echo
  57 echo '### Create all images' # three source (quorum), one destination
  58 echo
  59 TEST_IMG="$TEST_IMG.0" _make_test_img -o cluster_size=64k 10M
  60 TEST_IMG="$TEST_IMG.1" _make_test_img -o cluster_size=64k 10M
  61 TEST_IMG="$TEST_IMG.2" _make_test_img -o cluster_size=64k 10M
  62 TEST_IMG="$TEST_IMG.3" _make_test_img -o cluster_size=64k 10M
  63
  64 quorum="driver=raw,file.driver=quorum,file.vote-threshold=2"
  65 quorum="$quorum,file.children.0.file.filename=$TEST_IMG.0"
  66 quorum="$quorum,file.children.1.file.filename=$TEST_IMG.1"
  67 quorum="$quorum,file.children.2.file.filename=$TEST_IMG.2"
  68 quorum="$quorum,file.children.0.driver=$IMGFMT"
  69 quorum="$quorum,file.children.1.driver=$IMGFMT"
  70 quorum="$quorum,file.children.2.driver=$IMGFMT"
  71
  72 echo
  73 echo '### Output of qemu-img map (empty quorum)'
  74 echo
  75 $QEMU_IMG map --image-opts $quorum | _filter_qemu_img_map
  76
  77 # Now we write data to the quorum. All three images will read as
  78 # zeroes in all cases, but with different ways to represent them
  79 # (unallocated clusters, zero clusters, data clusters with zeroes)
  80 # that will have an effect on how the data will be mirrored and the
  81 # output of qemu-img map on the resulting image.
  82 echo
  83 echo '### Write data to the quorum'
  84 echo
  85 # Test 1: data regions surrounded by unallocated clusters.
  86 # Three data regions, the largest one (0x30000) will be picked, end result:
  87 # offset 0x10000, length 0x30000 -> data
  88 $QEMU_IO -c "write -P 0 $((0x10000)) $((0x10000))" "$TEST_IMG.0" | _filter_qemu_io
  89 $QEMU_IO -c "write -P 0 $((0x10000)) $((0x30000))" "$TEST_IMG.1" | _filter_qemu_io
  90 $QEMU_IO -c "write -P 0 $((0x10000)) $((0x20000))" "$TEST_IMG.2" | _filter_qemu_io
  91
  92 # Test 2: zero regions surrounded by data clusters.
  93 # First we allocate the data clusters.
  94 $QEMU_IO -c "open -o $quorum" -c "write -P 0 $((0x100000)) $((0x40000))" | _filter_qemu_io
  95
  96 # Three zero regions, the smallest one (0x10000) will be picked, end result:
  97 # offset 0x100000, length 0x10000 -> data
  98 # offset 0x110000, length 0x10000 -> zeroes
  99 # offset 0x120000, length 0x20000 -> data
 100 $QEMU_IO -c "write -z $((0x110000)) $((0x10000))" "$TEST_IMG.0" | _filter_qemu_io
 101 $QEMU_IO -c "write -z $((0x110000)) $((0x30000))" "$TEST_IMG.1" | _filter_qemu_io
 102 $QEMU_IO -c "write -z $((0x110000)) $((0x20000))" "$TEST_IMG.2" | _filter_qemu_io
 103
 104 # Test 3: zero clusters surrounded by unallocated clusters.
 105 # Everything reads as zeroes, no effect on the end result.
 106 $QEMU_IO -c "write -z $((0x150000)) $((0x10000))" "$TEST_IMG.0" | _filter_qemu_io
 107 $QEMU_IO -c "write -z $((0x150000)) $((0x30000))" "$TEST_IMG.1" | _filter_qemu_io
 108 $QEMU_IO -c "write -z $((0x150000)) $((0x20000))" "$TEST_IMG.2" | _filter_qemu_io
 109
 110 # Test 4: mix of data and zero clusters.
 111 # The zero region will be ignored in favor of the largest data region
 112 # (0x20000), end result:
 113 # offset 0x200000, length 0x20000 -> data
 114 $QEMU_IO -c "write -P 0 $((0x200000)) $((0x10000))" "$TEST_IMG.0" | _filter_qemu_io
 115 $QEMU_IO -c "write -z   $((0x200000)) $((0x30000))" "$TEST_IMG.1" | _filter_qemu_io
 116 $QEMU_IO -c "write -P 0 $((0x200000)) $((0x20000))" "$TEST_IMG.2" | _filter_qemu_io
 117
 118 # Test 5: write data to a region and then zeroize it, doing it
 119 # directly on the quorum device instead of the individual images.
 120 # This has no effect on the end result but proves that the quorum driver
 121 # supports 'write -z'.
 122 $QEMU_IO -c "open -o $quorum" -c "write -P 1 $((0x250000)) $((0x10000))" | _filter_qemu_io
 123 # Verify the data that we just wrote
 124 $QEMU_IO -c "open -o $quorum" -c "read -P 1 $((0x250000)) $((0x10000))" | _filter_qemu_io
 125 $QEMU_IO -c "open -o $quorum" -c "write -z $((0x250000)) $((0x10000))" | _filter_qemu_io
 126 # Now it should read back as zeroes
 127 $QEMU_IO -c "open -o $quorum" -c "read -P 0 $((0x250000)) $((0x10000))" | _filter_qemu_io
 128
 129 echo
 130 echo '### Launch the drive-mirror job'
 131 echo
 132 qemu_comm_method="qmp" _launch_qemu -drive if=virtio,"$quorum"
 133 h=$QEMU_HANDLE
 134 _send_qemu_cmd $h "{ 'execute': 'qmp_capabilities' }" 'return'
 135
 136 _send_qemu_cmd $h \
 137     "{'execute': 'drive-mirror',
 138                  'arguments': {'device': 'virtio0',
 139                                'format': '$IMGFMT',
 140                                'target': '$TEST_IMG.3',
 141                                'sync':   'full',
 142                                'mode':   'existing' }}"    \
 143      "BLOCK_JOB_READY.*virtio0"
 144
 145 _send_qemu_cmd $h \
 146     "{ 'execute': 'block-job-complete',
 147        'arguments': { 'device': 'virtio0' } }" \
 148     'BLOCK_JOB_COMPLETED'
 149
 150 _send_qemu_cmd $h "{ 'execute': 'quit' }" ''
 151
 152 echo
 153 echo '### Output of qemu-img map (destination image)'
 154 echo
 155 $QEMU_IMG map "$TEST_IMG.3" | _filter_qemu_img_map
 156
 157 # success, all done
 158 echo "*** done"
 159 rm -f $seq.full
 160 status=0