tests/qemu-iotests/046

   1 #!/bin/bash
   2 #
   3 # Test concurrent cluster allocations
   4 #
   5 # Copyright (C) 2012 Red Hat, Inc.
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 2 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 #
  20
  21 # creator
  22 owner=kwolf@redhat.com
  23
  24 seq=`basename $0`
  25 echo "QA output created by $seq"
  26
  27 here=`pwd`
  28 tmp=/tmp/$$
  29 status=1        # failure is the default!
  30
  31 _cleanup()
  32 {
  33         _cleanup_test_img
  34 }
  35 trap "_cleanup; exit \$status" 0 1 2 3 15
  36
  37 # get standard environment, filters and checks
  38 . ./common.rc
  39 . ./common.filter
  40
  41 _supported_fmt qcow2
  42 _supported_proto generic
  43 _supported_os Linux
  44
  45 CLUSTER_SIZE=64k
  46 size=128M
  47
  48 echo
  49 echo "== creating backing file for COW tests =="
  50
  51 _make_test_img $size
  52
  53 function backing_io()
  54 {
  55     local offset=$1
  56     local sectors=$2
  57     local op=$3
  58     local pattern=0
  59     local cur_sec=0
  60
  61     for i in $(seq 0 $((sectors - 1))); do
  62         cur_sec=$((offset / 65536 + i))
  63         pattern=$(( ( (cur_sec % 128) + (cur_sec / 128)) % 128 ))
  64
  65         echo "$op -P $pattern $((cur_sec * 64))k 64k"
  66     done
  67 }
  68
  69 backing_io 0 16 write | $QEMU_IO $TEST_IMG | _filter_qemu_io
  70
  71 mv $TEST_IMG $TEST_IMG.base
  72
  73 _make_test_img -b $TEST_IMG.base 6G
  74
  75 echo
  76 echo "== Some concurrent requests touching the same cluster =="
  77
  78 function overlay_io()
  79 {
  80 # Allocate middle of cluster 1, then write to somewhere before and after it
  81 cat  <<EOF
  82 break write_aio A
  83 aio_write -P 10 0x18000 0x2000
  84 wait_break A
  85
  86 aio_write -P 11 0x12000 0x2000
  87 aio_write -P 12 0x1c000 0x2000
  88
  89 resume A
  90 aio_flush
  91 EOF
  92
  93 # Sequential write case: Alloc middle of cluster 2, then write overlapping
  94 # to next cluster
  95 cat  <<EOF
  96 break write_aio A
  97 aio_write -P 20 0x28000 0x2000
  98 wait_break A
  99 aio_write -P 21 0x2a000 0x10000
 100 resume A
 101 aio_flush
 102 EOF
 103
 104 # The same with a gap between both requests
 105 cat  <<EOF
 106 break write_aio A
 107 aio_write -P 40 0x48000 0x2000
 108 wait_break A
 109 aio_write -P 41 0x4c000 0x10000
 110 resume A
 111 aio_flush
 112 EOF
 113
 114 # Sequential write, but the next cluster is already allocated
 115 cat  <<EOF
 116 write -P 70 0x76000 0x8000
 117 aio_flush
 118 break write_aio A
 119 aio_write -P 60 0x66000 0x2000
 120 wait_break A
 121 aio_write -P 61 0x6a000 0xe000
 122 resume A
 123 aio_flush
 124 EOF
 125
 126 # Sequential write, but the next cluster is already allocated
 127 # and phyiscally in the right position
 128 cat  <<EOF
 129 write -P 89 0x80000 0x1000
 130 write -P 90 0x96000 0x8000
 131 aio_flush
 132 discard 0x80000 0x10000
 133 aio_flush
 134 break write_aio A
 135 aio_write -P 80 0x86000 0x2000
 136 wait_break A
 137 aio_write -P 81 0x8a000 0xe000
 138 resume A
 139 aio_flush
 140 EOF
 141
 142 # Sequential write, and the next cluster is compressed
 143 cat  <<EOF
 144 write    -P 109 0xa0000 0x1000
 145 write -c -P 110 0xb0000 0x10000
 146 aio_flush
 147 discard 0xa0000 0x10000
 148 aio_flush
 149 break write_aio A
 150 aio_write -P 100 0xa6000 0x2000
 151 wait_break A
 152 aio_write -P 101 0xaa000 0xe000
 153 resume A
 154 aio_flush
 155 EOF
 156 }
 157
 158 overlay_io | $QEMU_IO blkdebug::$TEST_IMG | _filter_qemu_io |\
 159         sed -e 's/bytes at offset [0-9]*/bytes at offset XXX/g'
 160
 161 echo
 162 echo "== Verify image content =="
 163
 164 function verify_io()
 165 {
 166     echo read -P 0 0 0x10000
 167
 168     echo read -P 1  0x10000 0x2000
 169     echo read -P 11 0x12000 0x2000
 170     echo read -P 1  0x14000 0x4000
 171     echo read -P 10 0x18000 0x2000
 172     echo read -P 1  0x1a000 0x2000
 173     echo read -P 12 0x1c000 0x2000
 174     echo read -P 1  0x1e000 0x2000
 175
 176     echo read -P 2  0x20000 0x8000
 177     echo read -P 20 0x28000 0x2000
 178     echo read -P 21 0x2a000 0x10000
 179     echo read -P 3  0x3a000 0x6000
 180
 181     echo read -P 4  0x40000 0x8000
 182     echo read -P 40 0x48000 0x2000
 183     echo read -P 4  0x4a000 0x2000
 184     echo read -P 41 0x4c000 0x10000
 185     echo read -P 5  0x5c000 0x4000
 186
 187     echo read -P 6  0x60000 0x6000
 188     echo read -P 60 0x66000 0x2000
 189     echo read -P 6  0x68000 0x2000
 190     echo read -P 61 0x6a000 0xe000
 191     echo read -P 70 0x78000 0x6000
 192     echo read -P 7  0x7e000 0x2000
 193
 194     echo read -P 8  0x80000 0x6000
 195     echo read -P 80 0x86000 0x2000
 196     echo read -P 8  0x88000 0x2000
 197     echo read -P 81 0x8a000 0xe000
 198     echo read -P 90 0x98000 0x6000
 199     echo read -P 9  0x9e000 0x2000
 200
 201     echo read -P 10  0xa0000 0x6000
 202     echo read -P 100 0xa6000 0x2000
 203     echo read -P 10  0xa8000 0x2000
 204     echo read -P 101 0xaa000 0xe000
 205     echo read -P 110 0xb8000 0x8000
 206 }
 207
 208 verify_io | $QEMU_IO $TEST_IMG | _filter_qemu_io
 209
 210 _check_test_img
 211
 212 # success, all done
 213 echo "*** done"
 214 rm -f $seq.full
 215 status=0