tests/qemu-iotests/015

   1 #!/usr/bin/env bash
   2 # group: rw snapshot
   3 #
   4 # Combined test to grow the refcount table and test snapshots.
   5 #
   6 # Copyright (C) 2009 Red Hat, Inc.
   7 #
   8 # This program is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 2 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 #
  21
  22 # creator
  23 owner=kwolf@redhat.com
  24
  25 seq=`basename $0`
  26 echo "QA output created by $seq"
  27
  28 status=1        # failure is the default!
  29
  30 _cleanup()
  31 {
  32         _cleanup_test_img
  33         true
  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 # actually any format that supports snapshots
  42 _supported_fmt qcow2
  43 _supported_proto generic
  44 # Internal snapshots are (currently) impossible with refcount_bits=1,
  45 # and generally impossible with external data files
  46 _unsupported_imgopts 'refcount_bits=1[^0-9]' data_file
  47
  48 echo
  49 echo "creating image"
  50
  51 # With 1k clusters a refcount block contains 512 clusters
  52 # This makes 512k of the image file covered by a refcount block
  53 # A refcount table that spans one clusters has 128 refcount
  54 # tables which makes up 64M in the image file.
  55 #
  56 # We use a 36M image, so initially we can be sure that only one cluster is used
  57 # for the refcount table. On the other hand this is big enough to cause a
  58 # refcount table growth when rewriting the image after creating one snapshot.
  59 size=36M
  60 CLUSTER_SIZE=1k
  61 _make_test_img $size
  62
  63 # Create two snapshots which fill the image with two different patterns
  64 echo "creating first snapshot"
  65 $QEMU_IO -c "aio_write -P 123 0 $size" "$TEST_IMG" | _filter_qemu_io
  66 $QEMU_IMG snapshot -c snap1 "$TEST_IMG"
  67 echo "creating second snapshot"
  68 $QEMU_IO -c "aio_write -P 165 0 $size" "$TEST_IMG" | _filter_qemu_io
  69 $QEMU_IMG snapshot -c snap2 "$TEST_IMG"
  70
  71 # Now check the pattern
  72 echo "checking first snapshot"
  73 $QEMU_IMG snapshot -a snap1 "$TEST_IMG"
  74 $QEMU_IO -c "aio_read -P 123 0 $size" "$TEST_IMG" | _filter_qemu_io
  75 echo "checking second snapshot"
  76 $QEMU_IMG snapshot -a snap2 "$TEST_IMG"
  77 $QEMU_IO -c "aio_read -P 165 0 $size" "$TEST_IMG" | _filter_qemu_io
  78
  79 echo
  80 echo "checking image for errors"
  81 _check_test_img
  82
  83 # success, all done
  84 echo "*** done"
  85 rm -f $seq.full
  86 status=0