tests/qemu-iotests/182

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