tests/qemu-iotests/234

   1 #!/usr/bin/env python
   2 #
   3 # Copyright (C) 2018 Red Hat, Inc.
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 2 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 #
  18 # Creator/Owner: Kevin Wolf <kwolf@redhat.com>
  19 #
  20 # Check that block node activation and inactivation works with a block graph
  21 # that is built with individually created nodes
  22
  23 import iotests
  24 import os
  25
  26 iotests.verify_image_format(supported_fmts=['qcow2'])
  27 iotests.verify_platform(['linux'])
  28
  29 with iotests.FilePath('img') as img_path, \
  30      iotests.FilePath('backing') as backing_path, \
  31      iotests.FilePath('mig_fifo_a') as fifo_a, \
  32      iotests.FilePath('mig_fifo_b') as fifo_b, \
  33      iotests.VM(path_suffix='a') as vm_a, \
  34      iotests.VM(path_suffix='b') as vm_b:
  35
  36     iotests.qemu_img_pipe('create', '-f', iotests.imgfmt, backing_path, '64M')
  37     iotests.qemu_img_pipe('create', '-f', iotests.imgfmt, img_path, '64M')
  38
  39     os.mkfifo(fifo_a)
  40     os.mkfifo(fifo_b)
  41
  42     iotests.log('Launching source VM...')
  43     (vm_a.add_blockdev('file,filename=%s,node-name=drive0-file' % (img_path))
  44          .add_blockdev('%s,file=drive0-file,node-name=drive0' % (iotests.imgfmt))
  45          .add_blockdev('file,filename=%s,node-name=drive0-backing-file' % (backing_path))
  46          .add_blockdev('%s,file=drive0-backing-file,node-name=drive0-backing' % (iotests.imgfmt))
  47          .launch())
  48
  49     iotests.log('Launching destination VM...')
  50     (vm_b.add_blockdev('file,filename=%s,node-name=drive0-file' % (img_path))
  51          .add_blockdev('%s,file=drive0-file,node-name=drive0' % (iotests.imgfmt))
  52          .add_blockdev('file,filename=%s,node-name=drive0-backing-file' % (backing_path))
  53          .add_blockdev('%s,file=drive0-backing-file,node-name=drive0-backing' % (iotests.imgfmt))
  54          .add_incoming("exec: cat '%s'" % (fifo_a))
  55          .launch())
  56
  57     # Add a child node that was created after the parent node. The reverse case
  58     # is covered by the -blockdev options above.
  59     iotests.log(vm_a.qmp('blockdev-snapshot', node='drive0-backing',
  60                          overlay='drive0'))
  61     iotests.log(vm_b.qmp('blockdev-snapshot', node='drive0-backing',
  62                          overlay='drive0'))
  63
  64     iotests.log('Enabling migration QMP events on A...')
  65     iotests.log(vm_a.qmp('migrate-set-capabilities', capabilities=[
  66         {
  67             'capability': 'events',
  68             'state': True
  69         }
  70     ]))
  71
  72     iotests.log('Starting migration to B...')
  73     iotests.log(vm_a.qmp('migrate', uri='exec:cat >%s' % (fifo_a)))
  74     with iotests.Timeout(3, 'Migration does not complete'):
  75         while True:
  76             event = vm_a.event_wait('MIGRATION')
  77             iotests.log(event, filters=[iotests.filter_qmp_event])
  78             if event['data']['status'] == 'completed':
  79                 break
  80
  81     iotests.log(vm_a.qmp('query-migrate')['return']['status'])
  82     iotests.log(vm_b.qmp('query-migrate')['return']['status'])
  83
  84     iotests.log(vm_a.qmp('query-status'))
  85     iotests.log(vm_b.qmp('query-status'))
  86
  87     iotests.log('Add a second parent to drive0-file...')
  88     iotests.log(vm_b.qmp('blockdev-add', driver='raw', file='drive0-file',
  89                          node_name='drive0-raw'))
  90
  91     iotests.log('Restart A with -incoming and second parent...')
  92     vm_a.shutdown()
  93     (vm_a.add_blockdev('raw,file=drive0-file,node-name=drive0-raw')
  94          .add_incoming("exec: cat '%s'" % (fifo_b))
  95          .launch())
  96
  97     iotests.log(vm_a.qmp('blockdev-snapshot', node='drive0-backing',
  98                          overlay='drive0'))
  99
 100     iotests.log('Enabling migration QMP events on B...')
 101     iotests.log(vm_b.qmp('migrate-set-capabilities', capabilities=[
 102         {
 103             'capability': 'events',
 104             'state': True
 105         }
 106     ]))
 107
 108     iotests.log('Starting migration back to A...')
 109     iotests.log(vm_b.qmp('migrate', uri='exec:cat >%s' % (fifo_b)))
 110     with iotests.Timeout(3, 'Migration does not complete'):
 111         while True:
 112             event = vm_b.event_wait('MIGRATION')
 113             iotests.log(event, filters=[iotests.filter_qmp_event])
 114             if event['data']['status'] == 'completed':
 115                 break
 116
 117     iotests.log(vm_a.qmp('query-migrate')['return']['status'])
 118     iotests.log(vm_b.qmp('query-migrate')['return']['status'])
 119
 120     iotests.log(vm_a.qmp('query-status'))
 121     iotests.log(vm_b.qmp('query-status'))