024

   1 #!/bin/sh
   2 #
   3 # Rebasing COW images
   4 #
   5 # Copyright (C) 2009 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         rm -f $TEST_DIR/t.$IMGFMT.base_old
  35         rm -f $TEST_DIR/t.$IMGFMT.base_new
  36 }
  37 trap "_cleanup; exit \$status" 0 1 2 3 15
  38
  39 # get standard environment, filters and checks
  40 . ./common.rc
  41 . ./common.filter
  42 . ./common.pattern
  43
  44 # Currently only qcow2 supports rebasing
  45 _supported_fmt qcow2
  46 _supported_os Linux
  47
  48 CLUSTER_SIZE=65536
  49
  50 # Cluster allocations to be tested:
  51 #
  52 # Backing (old) 11  --  11  --  11  --  11  --
  53 # Backing (new) 22  22  --  --  22  22  --  --
  54 # COW image     33  33  33  33  --  --  --  --
  55
  56 echo "Creating backing file"
  57 echo
  58
  59 _make_test_img 1G
  60 io_pattern writev $((-2 * CLUSTER_SIZE)) $CLUSTER_SIZE $((2 * CLUSTER_SIZE)) 4 0x11
  61 mv $TEST_IMG $TEST_IMG.base_old
  62
  63 echo "Creating new backing file"
  64 echo
  65
  66 _make_test_img 1G
  67 io_pattern writev $((-4 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE)) $((4 * CLUSTER_SIZE)) 2 0x22
  68 mv $TEST_IMG $TEST_IMG.base_new
  69
  70 echo "Creating COW image"
  71 echo
  72
  73 _make_test_img -b $TEST_IMG.base_old 1G
  74 io_pattern writev 0 $((4 * CLUSTER_SIZE)) 0 1 0x33
  75
  76 echo "Read before the rebase to make sure everything is set up correctly"
  77 echo
  78 io_pattern readv $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
  79 io_pattern readv $((1 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
  80 io_pattern readv $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
  81 io_pattern readv $((3 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
  82 io_pattern readv $((4 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
  83 io_pattern readv $((5 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
  84 io_pattern readv $((6 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
  85 io_pattern readv $((7 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
  86
  87 echo
  88 echo Rebase and test again
  89 echo
  90 $QEMU_IMG rebase -b $TEST_IMG.base_new $TEST_IMG
  91 io_pattern readv $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
  92 io_pattern readv $((1 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
  93 io_pattern readv $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
  94 io_pattern readv $((3 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
  95 io_pattern readv $((4 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
  96 io_pattern readv $((5 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
  97 io_pattern readv $((6 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
  98 io_pattern readv $((7 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
  99
 100
 101 # success, all done
 102 echo "*** done"
 103 rm -f $seq.full
 104 status=0