tests/qemu-iotests/252

   1 #!/usr/bin/env bash
   2 # group: rw auto backing quick
   3 #
   4 # Tests for rebasing COW images that require zero cluster support
   5 #
   6 # Copyright (C) 2019 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=mreitz@redhat.com
  24
  25 seq=$(basename $0)
  26 echo "QA output created by $seq"
  27
  28 status=1        # failure is the default!
  29
  30 _cleanup()
  31 {
  32     _cleanup_test_img
  33     _rm_test_img "$TEST_IMG.base_new"
  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 . ./common.pattern
  41
  42 # Currently only qcow2 and qed support rebasing, and only qcow2 v3 has
  43 # zero cluster support
  44 _supported_fmt qcow2
  45 _unsupported_imgopts 'compat=0.10'
  46 _supported_proto file fuse
  47 _supported_os Linux
  48
  49 CLUSTER_SIZE=65536
  50
  51 echo
  52 echo "=== Test rebase without input base ==="
  53 echo
  54
  55 # Cluster allocations to be tested:
  56 #
  57 # Backing (new) 11 -- 11 -- 11 --
  58 # COW image     22 22 11 11 -- --
  59 #
  60 # Expected result:
  61 #
  62 # COW image     22 22 11 11 00 --
  63 #
  64 # (Cluster 2 might be "--" after the rebase, too, but rebase just
  65 #  compares the new backing file to the old one and disregards the
  66 #  overlay.  Therefore, it will never discard overlay clusters.)
  67
  68 _make_test_img $((6 * CLUSTER_SIZE))
  69 TEST_IMG="$TEST_IMG.base_new" _make_test_img $((6 * CLUSTER_SIZE))
  70
  71 echo
  72
  73 $QEMU_IO "$TEST_IMG" \
  74     -c "write -P 0x22 $((0 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
  75     -c "write -P 0x11 $((2 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
  76     | _filter_qemu_io
  77
  78 $QEMU_IO "$TEST_IMG.base_new" \
  79     -c "write -P 0x11 $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE" \
  80     -c "write -P 0x11 $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE" \
  81     -c "write -P 0x11 $((4 * CLUSTER_SIZE)) $CLUSTER_SIZE" \
  82     | _filter_qemu_io
  83
  84 echo
  85
  86 # This should be a no-op
  87 $QEMU_IMG rebase -b "" "$TEST_IMG"
  88
  89 # Verify the data is correct
  90 $QEMU_IO "$TEST_IMG" \
  91     -c "read -P 0x22 $((0 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
  92     -c "read -P 0x11 $((2 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
  93     -c "read -P 0x00 $((4 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
  94     | _filter_qemu_io
  95
  96 echo
  97
  98 # Verify the allocation status (first four cluster should be allocated
  99 # in TEST_IMG, clusters 4 and 5 should be unallocated (marked as zero
 100 # clusters here because there is no backing file))
 101 $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
 102
 103 echo
 104
 105 $QEMU_IMG rebase -b "$TEST_IMG.base_new" -F $IMGFMT "$TEST_IMG"
 106
 107 # Verify the data is correct
 108 $QEMU_IO "$TEST_IMG" \
 109     -c "read -P 0x22 $((0 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
 110     -c "read -P 0x11 $((2 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
 111     -c "read -P 0x00 $((4 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
 112     | _filter_qemu_io
 113
 114 echo
 115
 116 # Verify the allocation status (first four cluster should be allocated
 117 # in TEST_IMG, cluster 4 should be zero, and cluster 5 should be
 118 # unallocated (signified by '"depth": 1'))
 119 $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
 120
 121
 122 # success, all done
 123 echo "*** done"
 124 rm -f $seq.full
 125 status=0