tests/qemu-iotests/046

   1 #!/usr/bin/env 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 status=1        # failure is the default!
  28
  29 _cleanup()
  30 {
  31         _cleanup_test_img
  32 }
  33 trap "_cleanup; exit \$status" 0 1 2 3 15
  34
  35 # get standard environment, filters and checks
  36 . ./common.rc
  37 . ./common.filter
  38
  39 _supported_fmt qcow2
  40 _supported_proto file
  41 # data_file does not support compressed clusters
  42 _unsupported_imgopts data_file
  43
  44 CLUSTER_SIZE=64k
  45 size=128M
  46
  47 echo
  48 echo "== creating backing file for COW tests =="
  49
  50 _make_test_img $size
  51
  52 backing_io()
  53 {
  54     local offset=$1
  55     local sectors=$2
  56     local op=$3
  57     local pattern=0
  58     local cur_sec=0
  59
  60     for ((i=0;i<=$((sectors - 1));i++)); do
  61         cur_sec=$((offset / 65536 + i))
  62         pattern=$(( ( (cur_sec % 128) + (cur_sec / 128)) % 128 ))
  63
  64         echo "$op -P $pattern $((cur_sec * 64))k 64k"
  65     done
  66 }
  67
  68 backing_io 0 32 write | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
  69
  70 mv "$TEST_IMG" "$TEST_IMG.base"
  71
  72 _make_test_img -b "$TEST_IMG.base" -F $IMGFMT 6G
  73
  74 echo
  75 echo "== Some concurrent requests touching the same cluster =="
  76
  77 overlay_io()
  78 {
  79 # Allocate middle of cluster 1, then write to somewhere before and after it
  80 cat  <<EOF
  81 break write_aio A
  82 aio_write -P 10 0x18000 0x2000
  83 wait_break A
  84
  85 aio_write -P 11 0x12000 0x2000
  86 aio_write -P 12 0x1c000 0x2000
  87
  88 resume A
  89 aio_flush
  90 EOF
  91
  92 # Sequential write case: Alloc middle of cluster 2, then write overlapping
  93 # to next cluster
  94 cat  <<EOF
  95 break write_aio A
  96 aio_write -P 20 0x28000 0x2000
  97 wait_break A
  98 aio_write -P 21 0x2a000 0x10000
  99 resume A
 100 aio_flush
 101 EOF
 102
 103 # The same with a gap between both requests
 104 cat  <<EOF
 105 break write_aio A
 106 aio_write -P 40 0x48000 0x2000
 107 wait_break A
 108 aio_write -P 41 0x4c000 0x10000
 109 resume A
 110 aio_flush
 111 EOF
 112
 113 # Sequential write, but the next cluster is already allocated
 114 cat  <<EOF
 115 write -P 70 0x76000 0x8000
 116 aio_flush
 117 break write_aio A
 118 aio_write -P 60 0x66000 0x2000
 119 wait_break A
 120 aio_write -P 61 0x6a000 0xe000
 121 resume A
 122 aio_flush
 123 EOF
 124
 125 # Sequential write, but the next cluster is already allocated
 126 # and phyiscally in the right position
 127 cat  <<EOF
 128 write -P 89 0x80000 0x1000
 129 write -P 90 0x96000 0x8000
 130 aio_flush
 131 discard 0x80000 0x10000
 132 aio_flush
 133 break write_aio A
 134 aio_write -P 80 0x86000 0x2000
 135 wait_break A
 136 aio_write -P 81 0x8a000 0xe000
 137 resume A
 138 aio_flush
 139 EOF
 140
 141 # Sequential write, and the next cluster is compressed
 142 cat  <<EOF
 143 write    -P 109 0xa0000 0x1000
 144 write -c -P 110 0xb0000 0x10000
 145 aio_flush
 146 discard 0xa0000 0x10000
 147 aio_flush
 148 break write_aio A
 149 aio_write -P 100 0xa6000 0x2000
 150 wait_break A
 151 aio_write -P 101 0xaa000 0xe000
 152 resume A
 153 aio_flush
 154 EOF
 155
 156 # Reverse sequential write
 157 cat  <<EOF
 158 break write_aio A
 159 aio_write -P 121 0xdc000 0x2000
 160 wait_break A
 161 aio_write -P 120 0xc4000 0x18000
 162 resume A
 163 aio_flush
 164 EOF
 165
 166 # Reverse sequential write with a gap
 167 cat  <<EOF
 168 break write_aio A
 169 aio_write -P 141 0xfc000 0x2000
 170 wait_break A
 171 aio_write -P 140 0xe4000 0x14000
 172 resume A
 173 aio_flush
 174 EOF
 175
 176 # Allocate an area in the middle and then overwrite with a larger request
 177 cat  <<EOF
 178 break write_aio A
 179 aio_write -P 161 0x10c000 0x8000
 180 wait_break A
 181 aio_write -P 160 0x104000 0x18000
 182 resume A
 183 aio_flush
 184 EOF
 185 }
 186
 187 overlay_io | $QEMU_IO blkdebug::"$TEST_IMG" | _filter_qemu_io |\
 188         sed -e 's/bytes at offset [0-9]*/bytes at offset XXX/g'
 189
 190 echo
 191 echo "== Verify image content =="
 192
 193 verify_io()
 194 {
 195     if ($QEMU_IMG info -U -f "$IMGFMT" "$TEST_IMG" | grep "compat: 0.10" > /dev/null); then
 196         # In v2 images clusters are not discarded when there is a backing file.
 197         # Keep the variable empty so that the previous value can be used as
 198         # the default below
 199         discarded=
 200     else
 201         # Discarded clusters are zeroed for v3 or later
 202         discarded=0
 203     fi
 204
 205     echo read -P 0 0 0x10000
 206
 207     echo read -P 1  0x10000 0x2000
 208     echo read -P 11 0x12000 0x2000
 209     echo read -P 1  0x14000 0x4000
 210     echo read -P 10 0x18000 0x2000
 211     echo read -P 1  0x1a000 0x2000
 212     echo read -P 12 0x1c000 0x2000
 213     echo read -P 1  0x1e000 0x2000
 214
 215     echo read -P 2  0x20000 0x8000
 216     echo read -P 20 0x28000 0x2000
 217     echo read -P 21 0x2a000 0x10000
 218     echo read -P 3  0x3a000 0x6000
 219
 220     echo read -P 4  0x40000 0x8000
 221     echo read -P 40 0x48000 0x2000
 222     echo read -P 4  0x4a000 0x2000
 223     echo read -P 41 0x4c000 0x10000
 224     echo read -P 5  0x5c000 0x4000
 225
 226     echo read -P 6  0x60000 0x6000
 227     echo read -P 60 0x66000 0x2000
 228     echo read -P 6  0x68000 0x2000
 229     echo read -P 61 0x6a000 0xe000
 230     echo read -P 70 0x78000 0x6000
 231     echo read -P 7  0x7e000 0x2000
 232
 233     echo read -P ${discarded:-89} 0x80000 0x1000
 234     echo read -P ${discarded:-8} 0x81000 0x5000
 235     echo read -P 80 0x86000 0x2000
 236     echo read -P ${discarded:-8} 0x88000 0x2000
 237     echo read -P 81 0x8a000 0xe000
 238     echo read -P 90 0x98000 0x6000
 239     echo read -P 9  0x9e000 0x2000
 240
 241     echo read -P ${discarded:-109} 0xa0000 0x1000
 242     echo read -P ${discarded:-10} 0xa1000 0x5000
 243     echo read -P 100 0xa6000 0x2000
 244     echo read -P ${discarded:-10} 0xa8000 0x2000
 245     echo read -P 101 0xaa000 0xe000
 246     echo read -P 110 0xb8000 0x8000
 247
 248     echo read -P 12  0xc0000 0x4000
 249     echo read -P 120 0xc4000 0x18000
 250     echo read -P 121 0xdc000 0x2000
 251     echo read -P 13  0xde000 0x2000
 252
 253     echo read -P 14  0xe0000 0x4000
 254     echo read -P 140 0xe4000 0x14000
 255     echo read -P 15  0xf8000 0x4000
 256     echo read -P 141 0xfc000 0x2000
 257     echo read -P 15  0xfe000 0x2000
 258
 259     echo read -P 16  0x100000 0x4000
 260     echo read -P 160 0x104000 0x8000
 261     # Undefined content for 0x10c000 0x8000
 262     echo read -P 160 0x114000 0x8000
 263     echo read -P 17  0x11c000 0x4000
 264 }
 265
 266 verify_io | $QEMU_IO "$TEST_IMG" | _filter_qemu_io
 267
 268 _check_test_img
 269
 270 # success, all done
 271 echo "*** done"
 272 rm -f $seq.full
 273 status=0