tests/qemu-iotests/289

   1 #!/usr/bin/env bash
   2 #
   3 # qcow2 v3-exclusive error path testing
   4 # (026 tests paths common to v2 and v3)
   5 #
   6 # Copyright (C) 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 $seq"
  24
  25 status=1        # failure is the default!
  26
  27 _cleanup()
  28 {
  29     _cleanup_test_img
  30     rm "$TEST_DIR/blkdebug.conf"
  31     rm -f "$TEST_IMG.data_file"
  32 }
  33 trap "_cleanup; exit \$status" 0 1 2 3 15
  34
  35 # get standard environment, filters and checks
  36 . ./common.rc
  37 . ./common.filter
  38 . ./common.pattern
  39
  40 _supported_fmt qcow2
  41 _supported_proto file fuse
  42 # This is a v3-exclusive test;
  43 # As for data_file, error paths often very much depend on whether
  44 # there is an external data file or not; so we create one exactly when
  45 # we want to test it
  46 _unsupported_imgopts 'compat=0.10' data_file
  47
  48 echo
  49 echo === Avoid freeing external data clusters on failure ===
  50 echo
  51
  52 cat > "$TEST_DIR/blkdebug.conf" <<EOF
  53 [inject-error]
  54 event = "write_aio"
  55 errno = "5"
  56 once = "on"
  57 EOF
  58
  59 # Test what happens when there is an error when writing to an external
  60 # data file instead of when writing to a preallocated zero cluster
  61 _make_test_img -o "data_file=$TEST_IMG.data_file" 64k
  62
  63 # Put blkdebug above the data-file, and a raw node on top of that so
  64 # that blkdebug will see a write_aio event and emit an error.  This
  65 # will then trigger the alloc abort code, which we want to test here.
  66 $QEMU_IO -c "write 0 64k" \
  67     "json:{
  68          'driver': 'qcow2',
  69          'file': { 'driver': 'file', 'filename': '$TEST_IMG' },
  70          'data-file': {
  71              'driver': 'raw',
  72              'file': {
  73                  'driver': 'blkdebug',
  74                  'config': '$TEST_DIR/blkdebug.conf',
  75                  'image': {
  76                      'driver': 'file',
  77                      'filename': '$TEST_IMG.data_file'
  78                  }
  79              }
  80          }
  81      }" \
  82     | _filter_qemu_io
  83
  84 _check_test_img
  85
  86 # success, all done
  87 echo "*** done"
  88 rm -f $seq.full
  89 status=0