tests/qemu-iotests/024

   1 #!/usr/bin/env bash
   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 $seq"
  26
  27 status=1        # failure is the default!
  28
  29 _cleanup()
  30 {
  31     _cleanup_test_img
  32     rm -f "$TEST_DIR/t.$IMGFMT.base_old"
  33     rm -f "$TEST_DIR/t.$IMGFMT.base_new"
  34
  35     rm -f "$TEST_DIR/subdir/t.$IMGFMT"
  36     rm -f "$TEST_DIR/subdir/t.$IMGFMT.base_old"
  37     rm -f "$TEST_DIR/subdir/t.$IMGFMT.base_new"
  38     rmdir "$TEST_DIR/subdir" 2> /dev/null
  39 }
  40 trap "_cleanup; exit \$status" 0 1 2 3 15
  41
  42 # get standard environment, filters and checks
  43 . ./common.rc
  44 . ./common.filter
  45 . ./common.pattern
  46
  47 # Currently only qcow2 and qed support rebasing
  48 _supported_fmt qcow2 qed
  49 _supported_proto file
  50 _supported_os Linux
  51
  52 CLUSTER_SIZE=65536
  53
  54 # Cluster allocations to be tested:
  55 #
  56 # Backing (old) 11  --  11  --  11  --  11  --
  57 # Backing (new) 22  22  --  --  22  22  --  --
  58 # COW image     33  33  33  33  --  --  --  --
  59 #
  60 # The pattern is written twice to have both an alloc -> non-alloc and a
  61 # non-alloc -> alloc transition in the COW image.
  62
  63 echo "Creating backing file"
  64 echo
  65
  66 TEST_IMG_SAVE="$TEST_IMG"
  67 TEST_IMG="$TEST_IMG.base_old"
  68
  69 _make_test_img 1G
  70 io_pattern writev 0 $CLUSTER_SIZE $((2 * CLUSTER_SIZE)) 8 0x11
  71
  72 TEST_IMG="$TEST_IMG_SAVE.base_new"
  73
  74 echo "Creating new backing file"
  75 echo
  76
  77 _make_test_img 1G
  78 io_pattern writev 0 $((2 * CLUSTER_SIZE)) $((4 * CLUSTER_SIZE)) 4 0x22
  79
  80
  81 TEST_IMG="$TEST_IMG_SAVE"
  82
  83 echo "Creating COW image"
  84 echo
  85
  86 _make_test_img -b "$TEST_IMG.base_old" 1G
  87 io_pattern writev 0 $((4 * CLUSTER_SIZE)) 0 1 0x33
  88 io_pattern writev $((8 * CLUSTER_SIZE)) $((4 * CLUSTER_SIZE)) 0 1 0x33
  89
  90 echo "Read before the rebase to make sure everything is set up correctly"
  91 echo
  92 io_pattern readv $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
  93 io_pattern readv $((1 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
  94 io_pattern readv $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
  95 io_pattern readv $((3 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
  96 io_pattern readv $((4 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
  97 io_pattern readv $((5 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
  98 io_pattern readv $((6 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
  99 io_pattern readv $((7 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
 100 io_pattern readv $((8 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
 101 io_pattern readv $((9 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
 102 io_pattern readv $((10 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
 103 io_pattern readv $((11 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
 104 io_pattern readv $((12 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
 105 io_pattern readv $((13 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
 106 io_pattern readv $((14 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
 107 io_pattern readv $((15 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
 108
 109 echo
 110 echo Rebase and test again
 111 echo
 112 $QEMU_IMG rebase -b "$TEST_IMG.base_new" "$TEST_IMG"
 113 io_pattern readv $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
 114 io_pattern readv $((1 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
 115 io_pattern readv $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
 116 io_pattern readv $((3 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
 117 io_pattern readv $((4 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
 118 io_pattern readv $((5 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
 119 io_pattern readv $((6 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
 120 io_pattern readv $((7 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
 121 io_pattern readv $((8 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
 122 io_pattern readv $((9 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
 123 io_pattern readv $((10 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
 124 io_pattern readv $((11 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33
 125 io_pattern readv $((12 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
 126 io_pattern readv $((13 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
 127 io_pattern readv $((14 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11
 128 io_pattern readv $((15 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00
 129
 130 echo
 131 echo "=== Test rebase in a subdirectory of the working directory ==="
 132 echo
 133
 134 # Clean up the old images beforehand so they do not interfere with
 135 # this test
 136 _cleanup
 137
 138 mkdir "$TEST_DIR/subdir"
 139
 140 # Relative to the overlay
 141 BASE_OLD_OREL="t.$IMGFMT.base_old"
 142 BASE_NEW_OREL="t.$IMGFMT.base_new"
 143
 144 # Relative to $TEST_DIR (which is going to be our working directory)
 145 OVERLAY_WREL="subdir/t.$IMGFMT"
 146
 147 BASE_OLD="$TEST_DIR/subdir/$BASE_OLD_OREL"
 148 BASE_NEW="$TEST_DIR/subdir/$BASE_NEW_OREL"
 149 OVERLAY="$TEST_DIR/$OVERLAY_WREL"
 150
 151 # Test done here:
 152 #
 153 # Backing (old): 11 11 -- 11
 154 # Backing (new): -- 22 22 11
 155 # Overlay:       -- -- -- --
 156 #
 157 # Rebasing works, we have verified that above.  Here, we just want to
 158 # see that rebasing is done for the correct target backing file.
 159
 160 TEST_IMG=$BASE_OLD _make_test_img 1M
 161 TEST_IMG=$BASE_NEW _make_test_img 1M
 162 TEST_IMG=$OVERLAY _make_test_img -b "$BASE_OLD_OREL" 1M
 163
 164 echo
 165
 166 $QEMU_IO "$BASE_OLD" \
 167     -c "write -P 0x11 $((0 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
 168     -c "write -P 0x11 $((3 * CLUSTER_SIZE)) $((1 * CLUSTER_SIZE))" \
 169     | _filter_qemu_io
 170
 171 $QEMU_IO "$BASE_NEW" \
 172     -c "write -P 0x22 $((1 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
 173     -c "write -P 0x11 $((3 * CLUSTER_SIZE)) $((1 * CLUSTER_SIZE))" \
 174     | _filter_qemu_io
 175
 176 echo
 177
 178 pushd "$TEST_DIR" >/dev/null
 179 $QEMU_IMG rebase -f "$IMGFMT" -b "$BASE_NEW_OREL" "$OVERLAY_WREL"
 180 popd >/dev/null
 181
 182 # Verify the backing path is correct
 183 TEST_IMG=$OVERLAY _img_info | grep '^backing file'
 184
 185 echo
 186
 187 # Verify the data is correct
 188 $QEMU_IO "$OVERLAY" \
 189     -c "read -P 0x11 $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE" \
 190     -c "read -P 0x11 $((1 * CLUSTER_SIZE)) $CLUSTER_SIZE" \
 191     -c "read -P 0x00 $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE" \
 192     -c "read -P 0x11 $((3 * CLUSTER_SIZE)) $CLUSTER_SIZE" \
 193     | _filter_qemu_io
 194
 195 echo
 196
 197 # Verify that cluster #3 is not allocated (because it is the same in
 198 # $BASE_OLD and $BASE_NEW)
 199 $QEMU_IMG map "$OVERLAY" | _filter_qemu_img_map
 200
 201
 202 # success, all done
 203 echo "*** done"
 204 rm -f $seq.full
 205 status=0