tests/qemu-iotests/289

   1 #!/usr/bin/env bash
   2 # group: rw quick
   3 #
   4 # qcow2 v3-exclusive error path testing
   5 # (026 tests paths common to v2 and v3)
   6 #
   7 # Copyright (C) 2020 Red Hat, Inc.
   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 seq=$(basename $0)
  24 echo "QA output created by $seq"
  25
  26 status=1        # failure is the default!
  27
  28 _cleanup()
  29 {
  30     _cleanup_test_img
  31     rm "$TEST_DIR/blkdebug.conf"
  32     rm -f "$TEST_IMG.data_file"
  33 }
  34 trap "_cleanup; exit \$status" 0 1 2 3 15
  35
  36 # get standard environment, filters and checks
  37 . ./common.rc
  38 . ./common.filter
  39 . ./common.pattern
  40
  41 _supported_fmt qcow2
  42 _supported_proto file fuse
  43 # This is a v3-exclusive test;
  44 # As for data_file, error paths often very much depend on whether
  45 # there is an external data file or not; so we create one exactly when
  46 # we want to test it
  47 _unsupported_imgopts 'compat=0.10' data_file
  48
  49 echo
  50 echo === Avoid freeing external data clusters on failure ===
  51 echo
  52
  53 cat > "$TEST_DIR/blkdebug.conf" <<EOF
  54 [inject-error]
  55 event = "write_aio"
  56 errno = "5"
  57 once = "on"
  58 EOF
  59
  60 # Test what happens when there is an error when writing to an external
  61 # data file instead of when writing to a preallocated zero cluster
  62 _make_test_img -o "data_file=$TEST_IMG.data_file" 64k
  63
  64 # Put blkdebug above the data-file, and a raw node on top of that so
  65 # that blkdebug will see a write_aio event and emit an error.  This
  66 # will then trigger the alloc abort code, which we want to test here.
  67 $QEMU_IO -c "write 0 64k" \
  68     "json:{
  69          'driver': 'qcow2',
  70          'file': { 'driver': 'file', 'filename': '$TEST_IMG' },
  71          'data-file': {
  72              'driver': 'raw',
  73              'file': {
  74                  'driver': 'blkdebug',
  75                  'config': '$TEST_DIR/blkdebug.conf',
  76                  'image': {
  77                      'driver': 'file',
  78                      'filename': '$TEST_IMG.data_file'
  79                  }
  80              }
  81          }
  82      }" \
  83     | _filter_qemu_io
  84
  85 _check_test_img
  86
  87 # success, all done
  88 echo "*** done"
  89 rm -f $seq.full
  90 status=0