tests/qemu-iotests/291

   1 #!/usr/bin/env bash
   2 #
   3 # Test qemu-img bitmap handling
   4 #
   5 # Copyright (C) 2018-2020 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 seq="$(basename $0)"
  22 echo "QA output created by $seq"
  23
  24 status=1 # failure is the default!
  25
  26 _cleanup()
  27 {
  28     _cleanup_test_img
  29     nbd_server_stop
  30 }
  31 trap "_cleanup; exit \$status" 0 1 2 3 15
  32
  33 # get standard environment, filters and checks
  34 . ./common.rc
  35 . ./common.filter
  36 . ./common.nbd
  37
  38 _supported_fmt qcow2
  39 _supported_proto file
  40 _supported_os Linux
  41 _require_command QEMU_NBD
  42 # compat=0.10 does not support bitmaps
  43 _unsupported_imgopts 'compat=0.10'
  44
  45 echo
  46 echo "=== Initial image setup ==="
  47 echo
  48
  49 # Create backing image with one bitmap
  50 TEST_IMG="$TEST_IMG.base" _make_test_img 10M
  51 $QEMU_IMG bitmap --add -f $IMGFMT "$TEST_IMG.base" b0
  52 $QEMU_IO -c 'w 3M 1M' -f $IMGFMT "$TEST_IMG.base" | _filter_qemu_io
  53
  54 # Create initial image and populate two bitmaps: one active, one inactive.
  55 ORIG_IMG=$TEST_IMG
  56 TEST_IMG=$TEST_IMG.orig
  57 _make_test_img -b "$ORIG_IMG.base" -F $IMGFMT 10M
  58 $QEMU_IO -c 'w 0 1M' -f $IMGFMT "$TEST_IMG" | _filter_qemu_io
  59 $QEMU_IMG bitmap --add -g 512k -f $IMGFMT "$TEST_IMG" b1
  60 $QEMU_IMG bitmap --add --disable -f $IMGFMT "$TEST_IMG" b2
  61 $QEMU_IO -c 'w 3M 1M' -f $IMGFMT "$TEST_IMG" | _filter_qemu_io
  62 $QEMU_IMG bitmap --clear -f $IMGFMT "$TEST_IMG" b1
  63 $QEMU_IO -c 'w 1M 1M' -f $IMGFMT "$TEST_IMG" | _filter_qemu_io
  64 $QEMU_IMG bitmap --disable -f $IMGFMT "$TEST_IMG" b1
  65 $QEMU_IMG bitmap --enable -f $IMGFMT "$TEST_IMG" b2
  66 $QEMU_IO -c 'w 2M 1M' -f $IMGFMT "$TEST_IMG" | _filter_qemu_io
  67 echo "Check resulting qcow2 header extensions:"
  68 $PYTHON qcow2.py "$TEST_IMG" dump-header-exts
  69
  70 echo
  71 echo "=== Bitmap preservation not possible to non-qcow2 ==="
  72 echo
  73
  74 TEST_IMG=$ORIG_IMG
  75 $QEMU_IMG convert --bitmaps -O raw "$TEST_IMG.orig" "$TEST_IMG" &&
  76     echo "unexpected success"
  77
  78 echo
  79 echo "=== Convert with bitmap preservation ==="
  80 echo
  81
  82 # Only bitmaps from the active layer are copied
  83 $QEMU_IMG convert --bitmaps -O qcow2 "$TEST_IMG.orig" "$TEST_IMG"
  84 _img_info --format-specific
  85 # But we can also merge in bitmaps from other layers.  This test is a bit
  86 # contrived to cover more code paths, in reality, you could merge directly
  87 # into b0 without going through tmp
  88 $QEMU_IMG bitmap --add --disable -f $IMGFMT "$TEST_IMG" b0
  89 $QEMU_IMG bitmap --add --merge b0 -b "$TEST_IMG.base" -F $IMGFMT \
  90      -f $IMGFMT "$TEST_IMG" tmp
  91 $QEMU_IMG bitmap --merge tmp -f $IMGFMT "$TEST_IMG" b0
  92 $QEMU_IMG bitmap --remove --image-opts \
  93     driver=$IMGFMT,file.driver=file,file.filename="$TEST_IMG" tmp
  94 _img_info --format-specific
  95 echo "Check resulting qcow2 header extensions:"
  96 $PYTHON qcow2.py "$TEST_IMG" dump-header-exts
  97
  98 echo
  99 echo "=== Check bitmap contents ==="
 100 echo
 101
 102 # x-dirty-bitmap is a hack for reading bitmaps; it abuses block status to
 103 # report "data":false for portions of the bitmap which are set
 104 IMG="driver=nbd,server.type=unix,server.path=$nbd_unix_socket"
 105 nbd_server_start_unix_socket -r -f qcow2 -B b0 "$TEST_IMG"
 106 $QEMU_IMG map --output=json --image-opts \
 107     "$IMG,x-dirty-bitmap=qemu:dirty-bitmap:b0" | _filter_qemu_img_map
 108 nbd_server_start_unix_socket -r -f qcow2 -B b1 "$TEST_IMG"
 109 $QEMU_IMG map --output=json --image-opts \
 110     "$IMG,x-dirty-bitmap=qemu:dirty-bitmap:b1" | _filter_qemu_img_map
 111 nbd_server_start_unix_socket -r -f qcow2 -B b2 "$TEST_IMG"
 112 $QEMU_IMG map --output=json --image-opts \
 113     "$IMG,x-dirty-bitmap=qemu:dirty-bitmap:b2" | _filter_qemu_img_map
 114
 115 # success, all done
 116 echo '*** done'
 117 rm -f $seq.full
 118 status=0