tests/qemu-iotests/305

   1 #!/usr/bin/env bash
   2 #
   3 # Test the handling of errors in write requests with multiple allocations
   4 #
   5 # Copyright (C) 2020 Igalia, S.L.
   6 # Author: Alberto Garcia <berto@igalia.com>
   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=berto@igalia.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 }
  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
  40 _supported_fmt qcow2
  41 _supported_proto file fuse
  42 _supported_os Linux
  43 _unsupported_imgopts cluster_size refcount_bits extended_l2 compat=0.10 data_file
  44
  45 echo '### Create the image'
  46 _make_test_img -o refcount_bits=64,cluster_size=1k 1M
  47
  48 # The reference counts of the clusters for the first 123k of this
  49 # write request are stored in the first refcount block. The last
  50 # cluster (guest offset 123k) is referenced in the second refcount
  51 # block.
  52 echo '### Fill the first refcount block and one data cluster from the second'
  53 $QEMU_IO -c 'write 0 124k' "$TEST_IMG" | _filter_qemu_io
  54
  55 echo '### Discard two of the last data clusters, leave one in the middle'
  56 $QEMU_IO -c 'discard 121k 1k' "$TEST_IMG" | _filter_qemu_io
  57 $QEMU_IO -c 'discard 123k 1k' "$TEST_IMG" | _filter_qemu_io
  58
  59 echo '### Corrupt the offset of the second refcount block'
  60 refcount_table_offset=$(peek_file_be "$TEST_IMG" 48 8)
  61 poke_file "$TEST_IMG" $(($refcount_table_offset+14)) "\x06"
  62
  63 # This tries to allocate the two clusters discarded earlier (guest
  64 # offsets 121k and 123k). Their reference counts are in the first and
  65 # second refcount blocks respectively, but only the first one can be
  66 # allocated correctly because the second entry of the refcount table
  67 # is corrupted.
  68 echo '### Try to allocate the discarded clusters again'
  69 $QEMU_IO -c 'write 121k 3k' "$TEST_IMG" | _filter_qemu_io
  70
  71 # success, all done
  72 echo "*** done"
  73 rm -f $seq.full
  74 status=0