tests/qemu-iotests/027

   1 #!/bin/bash
   2 #
   3 # Test that sub-cluster allocating writes zero the rest of the cluster
   4 #
   5 # Copyright (C) 2010 IBM, Corp.
   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=stefanha@linux.vnet.ibm.com
  23
  24 seq=`basename $0`
  25 echo "QA output created by $seq"
  26
  27 here=`pwd`
  28 status=1        # failure is the default!
  29
  30 _cleanup()
  31 {
  32         _cleanup_test_img
  33 }
  34 trap "_cleanup; exit \$status" 0 1 2 3 15
  35
  36 # get standard environment, filters and checks
  37 . ./common.rc
  38 . ./common.filter
  39
  40 _supported_fmt vmdk qcow qcow2 qed
  41 _supported_proto generic
  42 _supported_os Linux
  43
  44
  45 size=128M
  46 cluster_size=65536
  47 subcluster_offset=1024
  48 subcluster_size=2048
  49 _make_test_img $size
  50
  51 # This first write causes an L2 table to be allocated so that the next write
  52 # doesn't need to allocate one and is therefore at the end of the image file.
  53 # Otherwise an L2 table could get in the way after the data cluster.
  54 echo
  55 echo "== writing first cluster to populate metadata =="
  56 $QEMU_IO -c "write -pP 0xde $cluster_size $cluster_size" "$TEST_IMG" | _filter_qemu_io
  57
  58 echo
  59 echo "== writing at sub-cluster granularity =="
  60 $QEMU_IO -c "write -pP 0xa $subcluster_offset $subcluster_size" "$TEST_IMG" | _filter_qemu_io
  61
  62 echo
  63 echo "== verify pattern =="
  64 $QEMU_IO -c "read -pP 0xa $subcluster_offset $subcluster_size" "$TEST_IMG" | _filter_qemu_io
  65
  66 echo
  67 echo "== verify zeroes before sub-cluster pattern =="
  68 $QEMU_IO -c "read -pP 0 -l $subcluster_offset 0 $subcluster_size" "$TEST_IMG" | _filter_qemu_io
  69
  70 echo
  71 echo "== verify zeroes after sub-cluster pattern =="
  72 $QEMU_IO -c "read -pP 0 -l 512 -s $subcluster_size $subcluster_offset $(( subcluster_size + 512 ))" "$TEST_IMG" | _filter_qemu_io
  73
  74 # success, all done
  75 echo "*** done"
  76 rm -f $seq.full
  77 status=0