tests/qemu-iotests/182

   1 #!/usr/bin/env bash
   2 #
   3 # Test image locking for POSIX locks
   4 #
   5 # Copyright 2017 Red Hat, Inc.
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 2 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 #
  20
  21 # creator
  22 owner=famz@redhat.com
  23
  24 seq="$(basename $0)"
  25 echo "QA output created by $seq"
  26
  27 tmp=/tmp/$$
  28 status=1        # failure is the default!
  29
  30 _cleanup()
  31 {
  32     _cleanup_test_img
  33     _rm_test_img "$TEST_IMG.overlay"
  34     rm -f "$SOCK_DIR/nbd.socket"
  35 }
  36 trap "_cleanup; exit \$status" 0 1 2 3 15
  37
  38 # get standard environment, filters and checks
  39 . ./common.rc
  40 . ./common.filter
  41 . ./common.qemu
  42
  43 _supported_fmt qcow2
  44 _supported_proto file
  45
  46 size=32M
  47
  48 case "$QEMU_DEFAULT_MACHINE" in
  49   s390-ccw-virtio)
  50       virtioblk=virtio-blk-ccw
  51       ;;
  52   *)
  53       virtioblk=virtio-blk-pci
  54       ;;
  55 esac
  56
  57 _make_test_img $size
  58
  59 echo "Starting QEMU"
  60 _launch_qemu -drive file=$TEST_IMG,if=none,id=drive0,file.locking=on \
  61     -device $virtioblk,drive=drive0
  62
  63 echo
  64 echo "Starting a second QEMU using the same image should fail"
  65 echo 'quit' | $QEMU -nographic -monitor stdio \
  66     -drive file=$TEST_IMG,if=none,id=drive0,file.locking=on \
  67     -device $virtioblk,drive=drive0 2>&1 | _filter_testdir 2>&1 |
  68     _filter_qemu |
  69     sed -e '/falling back to POSIX file/d' \
  70         -e '/locks can be lost unexpectedly/d'
  71
  72 _cleanup_qemu
  73
  74 echo
  75 echo '=== Testing reopen ==='
  76 echo
  77
  78 # This tests that reopening does not unshare any permissions it should
  79 # not unshare
  80 # (There was a bug where reopening shared exactly the opposite of the
  81 # permissions it was supposed to share)
  82
  83 _launch_qemu
  84
  85 _send_qemu_cmd $QEMU_HANDLE \
  86     "{'execute': 'qmp_capabilities'}" \
  87     'return'
  88
  89 # Open the image without any format layer (we are not going to access
  90 # it, so that is fine)
  91 # This should keep all permissions shared.
  92 success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \
  93     "{'execute': 'blockdev-add',
  94       'arguments': {
  95           'node-name': 'node0',
  96           'driver': 'file',
  97           'filename': '$TEST_IMG',
  98           'locking': 'on'
  99           } }" \
 100     'return' \
 101     'error'
 102
 103 # This snapshot will perform a reopen to drop R/W to RO.
 104 # It should still keep all permissions shared.
 105 success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \
 106     "{'execute': 'blockdev-snapshot-sync',
 107       'arguments': {
 108           'node-name': 'node0',
 109           'snapshot-file': '$TEST_IMG.overlay',
 110           'snapshot-node-name': 'node1'
 111       } }" \
 112     'return' \
 113     'error'
 114
 115 # Now open the same file again
 116 # This does not require any permissions (and does not unshare any), so
 117 # this will not conflict with node0.
 118 success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \
 119     "{'execute': 'blockdev-add',
 120       'arguments': {
 121           'node-name': 'node1',
 122           'driver': 'file',
 123           'filename': '$TEST_IMG',
 124           'locking': 'on'
 125           } }" \
 126     'return' \
 127     'error'
 128
 129 # Start an NBD server to which we can attach node1
 130 success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \
 131     "{'execute': 'nbd-server-start',
 132       'arguments': {
 133           'addr': {
 134               'type': 'unix',
 135               'data': {
 136                   'path': '$SOCK_DIR/nbd.socket'
 137               } } } }" \
 138     'return' \
 139     'error'
 140
 141 # Now we attach the image to the NBD server.  This server does require
 142 # some permissions (at least WRITE and READ_CONSISTENT), so if
 143 # reopening node0 unshared any (which it should not have), this will
 144 # fail (but it should not).
 145 success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \
 146     "{'execute': 'nbd-server-add',
 147       'arguments': {
 148           'device': 'node1'
 149       } }" \
 150     'return' \
 151     'error'
 152
 153 _cleanup_qemu
 154
 155 echo
 156 echo '=== Testing failure to loosen restrictions ==='
 157 echo
 158
 159 _launch_qemu -drive file=$TEST_IMG,if=none,file.locking=on
 160
 161 _send_qemu_cmd $QEMU_HANDLE \
 162     "{'execute': 'qmp_capabilities'}" \
 163     'return'
 164
 165 _cleanup_test_img
 166
 167 # When quitting qemu, it will try to drop its locks on the test image.
 168 # Because that file no longer exists, it will be unable to do so.
 169 # However, that is not fatal, so it should just move on.
 170 _send_qemu_cmd $QEMU_HANDLE \
 171     "{'execute': 'quit'}" \
 172     'return'
 173
 174 wait=1 _cleanup_qemu
 175
 176 # success, all done
 177 echo "*** done"
 178 rm -f $seq.full
 179 status=0