tests/qemu-iotests/252

   1 #!/usr/bin/env bash
   2 #
   3 # Tests for rebasing COW images that require zero cluster support
   4 #
   5 # Copyright (C) 2019 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=mreitz@redhat.com
  23
  24 seq=$(basename $0)
  25 echo "QA output created by $seq"
  26
  27 status=1        # failure is the default!
  28
  29 _cleanup()
  30 {
  31     _cleanup_test_img
  32     _rm_test_img "$TEST_IMG.base_new"
  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 . ./common.pattern
  40
  41 # Currently only qcow2 and qed support rebasing, and only qcow2 v3 has
  42 # zero cluster support
  43 _supported_fmt qcow2
  44 _unsupported_imgopts 'compat=0.10'
  45 _supported_proto file
  46 _supported_os Linux
  47
  48 CLUSTER_SIZE=65536
  49
  50 echo
  51 echo "=== Test rebase without input base ==="
  52 echo
  53
  54 # Cluster allocations to be tested:
  55 #
  56 # Backing (new) 11 -- 11 -- 11 --
  57 # COW image     22 22 11 11 -- --
  58 #
  59 # Expected result:
  60 #
  61 # COW image     22 22 11 11 00 --
  62 #
  63 # (Cluster 2 might be "--" after the rebase, too, but rebase just
  64 #  compares the new backing file to the old one and disregards the
  65 #  overlay.  Therefore, it will never discard overlay clusters.)
  66
  67 _make_test_img $((6 * CLUSTER_SIZE))
  68 TEST_IMG="$TEST_IMG.base_new" _make_test_img $((6 * CLUSTER_SIZE))
  69
  70 echo
  71
  72 $QEMU_IO "$TEST_IMG" \
  73     -c "write -P 0x22 $((0 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
  74     -c "write -P 0x11 $((2 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
  75     | _filter_qemu_io
  76
  77 $QEMU_IO "$TEST_IMG.base_new" \
  78     -c "write -P 0x11 $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE" \
  79     -c "write -P 0x11 $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE" \
  80     -c "write -P 0x11 $((4 * CLUSTER_SIZE)) $CLUSTER_SIZE" \
  81     | _filter_qemu_io
  82
  83 echo
  84
  85 # This should be a no-op
  86 $QEMU_IMG rebase -b "" "$TEST_IMG"
  87
  88 # Verify the data is correct
  89 $QEMU_IO "$TEST_IMG" \
  90     -c "read -P 0x22 $((0 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
  91     -c "read -P 0x11 $((2 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
  92     -c "read -P 0x00 $((4 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
  93     | _filter_qemu_io
  94
  95 echo
  96
  97 # Verify the allocation status (first four cluster should be allocated
  98 # in TEST_IMG, clusters 4 and 5 should be unallocated (marked as zero
  99 # clusters here because there is no backing file))
 100 $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
 101
 102 echo
 103
 104 $QEMU_IMG rebase -b "$TEST_IMG.base_new" -F $IMGFMT "$TEST_IMG"
 105
 106 # Verify the data is correct
 107 $QEMU_IO "$TEST_IMG" \
 108     -c "read -P 0x22 $((0 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
 109     -c "read -P 0x11 $((2 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
 110     -c "read -P 0x00 $((4 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \
 111     | _filter_qemu_io
 112
 113 echo
 114
 115 # Verify the allocation status (first four cluster should be allocated
 116 # in TEST_IMG, cluster 4 should be zero, and cluster 5 should be
 117 # unallocated (signified by '"depth": 1'))
 118 $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map
 119
 120
 121 # success, all done
 122 echo "*** done"
 123 rm -f $seq.full
 124 status=0