tests/qemu-iotests/305

   1 #!/usr/bin/env bash
   2 # group: rw quick
   3 #
   4 # Test the handling of errors in write requests with multiple allocations
   5 #
   6 # Copyright (C) 2020 Igalia, S.L.
   7 # Author: Alberto Garcia <berto@igalia.com>
   8 #
   9 # This program is free software; you can redistribute it and/or modify
  10 # it under the terms of the GNU General Public License as published by
  11 # the Free Software Foundation; either version 2 of the License, or
  12 # (at your option) any later version.
  13 #
  14 # This program is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 # GNU General Public License for more details.
  18 #
  19 # You should have received a copy of the GNU General Public License
  20 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 #
  22
  23 # creator
  24 owner=berto@igalia.com
  25
  26 seq=`basename $0`
  27 echo "QA output created by $seq"
  28
  29 status=1    # failure is the default!
  30
  31 _cleanup()
  32 {
  33     _cleanup_test_img
  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
  41 _supported_fmt qcow2
  42 _supported_proto file fuse
  43 _supported_os Linux
  44 _unsupported_imgopts cluster_size refcount_bits extended_l2 compat=0.10 data_file
  45
  46 echo '### Create the image'
  47 _make_test_img -o refcount_bits=64,cluster_size=1k 1M
  48
  49 # The reference counts of the clusters for the first 123k of this
  50 # write request are stored in the first refcount block. The last
  51 # cluster (guest offset 123k) is referenced in the second refcount
  52 # block.
  53 echo '### Fill the first refcount block and one data cluster from the second'
  54 $QEMU_IO -c 'write 0 124k' "$TEST_IMG" | _filter_qemu_io
  55
  56 echo '### Discard two of the last data clusters, leave one in the middle'
  57 $QEMU_IO -c 'discard 121k 1k' "$TEST_IMG" | _filter_qemu_io
  58 $QEMU_IO -c 'discard 123k 1k' "$TEST_IMG" | _filter_qemu_io
  59
  60 echo '### Corrupt the offset of the second refcount block'
  61 refcount_table_offset=$(peek_file_be "$TEST_IMG" 48 8)
  62 poke_file "$TEST_IMG" $(($refcount_table_offset+14)) "\x06"
  63
  64 # This tries to allocate the two clusters discarded earlier (guest
  65 # offsets 121k and 123k). Their reference counts are in the first and
  66 # second refcount blocks respectively, but only the first one can be
  67 # allocated correctly because the second entry of the refcount table
  68 # is corrupted.
  69 echo '### Try to allocate the discarded clusters again'
  70 $QEMU_IO -c 'write 121k 3k' "$TEST_IMG" | _filter_qemu_io
  71
  72 # success, all done
  73 echo "*** done"
  74 rm -f $seq.full
  75 status=0