tests/qemu-iotests/291

   1 #!/usr/bin/env bash
   2 # group: rw quick
   3 #
   4 # Test qemu-img bitmap handling
   5 #
   6 # Copyright (C) 2018-2020 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 seq="$(basename $0)"
  23 echo "QA output created by $seq"
  24
  25 status=1 # failure is the default!
  26
  27 _cleanup()
  28 {
  29     _cleanup_test_img
  30     nbd_server_stop
  31 }
  32 trap "_cleanup; exit \$status" 0 1 2 3 15
  33
  34 # get standard environment, filters and checks
  35 . ./common.rc
  36 . ./common.filter
  37 . ./common.nbd
  38
  39 _supported_fmt qcow2
  40 _supported_proto file fuse
  41 _supported_os Linux
  42 _require_command QEMU_NBD
  43 # compat=0.10 does not support bitmaps
  44 _unsupported_imgopts 'compat=0.10'
  45
  46 # Filter irrelevant format-specific information from the qemu-img info
  47 # output (we only want the bitmaps, basically)
  48 _filter_irrelevant_img_info()
  49 {
  50     grep -v -e 'compat' -e 'compression type' -e 'data file' -e 'extended l2' \
  51             -e 'lazy refcounts' -e 'refcount bits'
  52 }
  53
  54 echo
  55 echo "=== Initial image setup ==="
  56 echo
  57
  58 # Create backing image with one bitmap
  59 TEST_IMG="$TEST_IMG.base" _make_test_img 10M
  60 $QEMU_IMG bitmap --add -f $IMGFMT "$TEST_IMG.base" b0
  61 $QEMU_IO -c 'w 3M 1M' -f $IMGFMT "$TEST_IMG.base" | _filter_qemu_io
  62
  63 # Create initial image and populate two bitmaps: one active, one inactive.
  64 ORIG_IMG=$TEST_IMG
  65 TEST_IMG=$TEST_IMG.orig
  66 _make_test_img -b "$ORIG_IMG.base" -F $IMGFMT 10M
  67 $QEMU_IO -c 'w 0 1M' -f $IMGFMT "$TEST_IMG" | _filter_qemu_io
  68 $QEMU_IMG bitmap --add -g 512k -f $IMGFMT "$TEST_IMG" b1
  69 $QEMU_IMG bitmap --add --disable -f $IMGFMT "$TEST_IMG" b2
  70 $QEMU_IO -c 'w 3M 1M' -f $IMGFMT "$TEST_IMG" | _filter_qemu_io
  71 $QEMU_IMG bitmap --clear -f $IMGFMT "$TEST_IMG" b1
  72 $QEMU_IO -c 'w 1M 1M' -f $IMGFMT "$TEST_IMG" | _filter_qemu_io
  73 $QEMU_IMG bitmap --disable -f $IMGFMT "$TEST_IMG" b1
  74 $QEMU_IMG bitmap --enable -f $IMGFMT "$TEST_IMG" b2
  75 $QEMU_IO -c 'w 2M 1M' -f $IMGFMT "$TEST_IMG" | _filter_qemu_io
  76
  77 echo
  78 echo "=== Bitmap preservation not possible to non-qcow2 ==="
  79 echo
  80
  81 TEST_IMG=$ORIG_IMG
  82 $QEMU_IMG convert --bitmaps -O raw "$TEST_IMG.orig" "$TEST_IMG" &&
  83     echo "unexpected success"
  84
  85 echo
  86 echo "=== Convert with bitmap preservation ==="
  87 echo
  88
  89 # Only bitmaps from the active layer are copied
  90 $QEMU_IMG convert --bitmaps -O qcow2 "$TEST_IMG.orig" "$TEST_IMG"
  91 _img_info --format-specific | _filter_irrelevant_img_info
  92 # But we can also merge in bitmaps from other layers.  This test is a bit
  93 # contrived to cover more code paths, in reality, you could merge directly
  94 # into b0 without going through tmp
  95 $QEMU_IMG bitmap --add --disable -f $IMGFMT "$TEST_IMG" b0
  96 $QEMU_IMG bitmap --add --merge b0 -b "$TEST_IMG.base" -F $IMGFMT \
  97      -f $IMGFMT "$TEST_IMG" tmp
  98 $QEMU_IMG bitmap --merge tmp -f $IMGFMT "$TEST_IMG" b0
  99 $QEMU_IMG bitmap --remove --image-opts \
 100     driver=$IMGFMT,file.driver=file,file.filename="$TEST_IMG" tmp
 101 _img_info --format-specific | _filter_irrelevant_img_info
 102
 103 echo
 104 echo "=== Merge from top layer into backing image ==="
 105 echo
 106
 107 $QEMU_IMG rebase -u -F qcow2 -b "$TEST_IMG.base" "$TEST_IMG"
 108 $QEMU_IMG bitmap --add --merge b2 -b "$TEST_IMG" -F $IMGFMT \
 109      -f $IMGFMT "$TEST_IMG.base" b3
 110 _img_info --format-specific --backing-chain | _filter_irrelevant_img_info
 111
 112 echo
 113 echo "=== Check bitmap contents ==="
 114 echo
 115
 116 # x-dirty-bitmap is a hack for reading bitmaps; it abuses block status to
 117 # report "data":false for portions of the bitmap which are set
 118 IMG="driver=nbd,server.type=unix,server.path=$nbd_unix_socket"
 119 nbd_server_start_unix_socket -r -f qcow2 \
 120     -B b0 -B b1 -B b2 -B b3 "$TEST_IMG"
 121 $QEMU_IMG map --output=json --image-opts \
 122     "$IMG,x-dirty-bitmap=qemu:dirty-bitmap:b0" | _filter_qemu_img_map
 123 $QEMU_IMG map --output=json --image-opts \
 124     "$IMG,x-dirty-bitmap=qemu:dirty-bitmap:b1" | _filter_qemu_img_map
 125 $QEMU_IMG map --output=json --image-opts \
 126     "$IMG,x-dirty-bitmap=qemu:dirty-bitmap:b2" | _filter_qemu_img_map
 127 $QEMU_IMG map --output=json --image-opts \
 128     "$IMG,x-dirty-bitmap=qemu:dirty-bitmap:b3" | _filter_qemu_img_map
 129
 130 nbd_server_stop
 131
 132 # success, all done
 133 echo '*** done'
 134 rm -f $seq.full
 135 status=0