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=fam@euphon.net
  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 _make_test_img $size
  50
  51 echo "Starting QEMU"
  52 _launch_qemu -drive file=$TEST_IMG,if=none,id=drive0,file.locking=on \
  53     -device virtio-blk,drive=drive0
  54
  55 echo
  56 echo "Starting a second QEMU using the same image should fail"
  57 echo 'quit' | $QEMU -nographic -monitor stdio \
  58     -drive file=$TEST_IMG,if=none,id=drive0,file.locking=on \
  59     -device virtio-blk,drive=drive0 2>&1 | _filter_testdir 2>&1 |
  60     _filter_qemu |
  61     sed -e '/falling back to POSIX file/d' \
  62         -e '/locks can be lost unexpectedly/d'
  63
  64 _cleanup_qemu
  65
  66 echo
  67 echo '=== Testing reopen ==='
  68 echo
  69
  70 # This tests that reopening does not unshare any permissions it should
  71 # not unshare
  72 # (There was a bug where reopening shared exactly the opposite of the
  73 # permissions it was supposed to share)
  74
  75 _launch_qemu
  76
  77 _send_qemu_cmd $QEMU_HANDLE \
  78     "{'execute': 'qmp_capabilities'}" \
  79     'return'
  80
  81 # Open the image without any format layer (we are not going to access
  82 # it, so that is fine)
  83 # This should keep all permissions shared.
  84 success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \
  85     "{'execute': 'blockdev-add',
  86       'arguments': {
  87           'node-name': 'node0',
  88           'driver': 'file',
  89           'filename': '$TEST_IMG',
  90           'locking': 'on'
  91           } }" \
  92     'return' \
  93     'error'
  94
  95 # This snapshot will perform a reopen to drop R/W to RO.
  96 # It should still keep all permissions shared.
  97 success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \
  98     "{'execute': 'blockdev-snapshot-sync',
  99       'arguments': {
 100           'node-name': 'node0',
 101           'snapshot-file': '$TEST_IMG.overlay',
 102           'snapshot-node-name': 'node1'
 103       } }" \
 104     'return' \
 105     'error'
 106
 107 # Now open the same file again
 108 # This does not require any permissions (and does not unshare any), so
 109 # this will not conflict with node0.
 110 success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \
 111     "{'execute': 'blockdev-add',
 112       'arguments': {
 113           'node-name': 'node1',
 114           'driver': 'file',
 115           'filename': '$TEST_IMG',
 116           'locking': 'on'
 117           } }" \
 118     'return' \
 119     'error'
 120
 121 # Start an NBD server to which we can attach node1
 122 success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \
 123     "{'execute': 'nbd-server-start',
 124       'arguments': {
 125           'addr': {
 126               'type': 'unix',
 127               'data': {
 128                   'path': '$SOCK_DIR/nbd.socket'
 129               } } } }" \
 130     'return' \
 131     'error'
 132
 133 # Now we attach the image to the NBD server.  This server does require
 134 # some permissions (at least WRITE and READ_CONSISTENT), so if
 135 # reopening node0 unshared any (which it should not have), this will
 136 # fail (but it should not).
 137 success_or_failure=y _send_qemu_cmd $QEMU_HANDLE \
 138     "{'execute': 'nbd-server-add',
 139       'arguments': {
 140           'device': 'node1'
 141       } }" \
 142     'return' \
 143     'error'
 144
 145 _cleanup_qemu
 146
 147 echo
 148 echo '=== Testing failure to loosen restrictions ==='
 149 echo
 150
 151 _launch_qemu -drive file=$TEST_IMG,if=none,file.locking=on
 152
 153 _send_qemu_cmd $QEMU_HANDLE \
 154     "{'execute': 'qmp_capabilities'}" \
 155     'return'
 156
 157 _cleanup_test_img
 158
 159 # When quitting qemu, it will try to drop its locks on the test image.
 160 # Because that file no longer exists, it will be unable to do so.
 161 # However, that is not fatal, so it should just move on.
 162 _send_qemu_cmd $QEMU_HANDLE \
 163     "{'execute': 'quit'}" \
 164     'return'
 165
 166 wait=1 _cleanup_qemu
 167
 168 # success, all done
 169 echo "*** done"
 170 rm -f $seq.full
 171 status=0