tests/qemu-iotests/234

   1 #!/usr/bin/env python3
   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     vm_a.enable_migration_events('A')
  50
  51     iotests.log('Launching destination VM...')
  52     (vm_b.add_blockdev('file,filename=%s,node-name=drive0-file' % (img_path))
  53          .add_blockdev('%s,file=drive0-file,node-name=drive0' % (iotests.imgfmt))
  54          .add_blockdev('file,filename=%s,node-name=drive0-backing-file' % (backing_path))
  55          .add_blockdev('%s,file=drive0-backing-file,node-name=drive0-backing' % (iotests.imgfmt))
  56          .add_incoming("exec: cat '%s'" % (fifo_a))
  57          .launch())
  58
  59     vm_b.enable_migration_events('B')
  60
  61     # Add a child node that was created after the parent node. The reverse case
  62     # is covered by the -blockdev options above.
  63     iotests.log(vm_a.qmp('blockdev-snapshot', node='drive0-backing',
  64                          overlay='drive0'))
  65     iotests.log(vm_b.qmp('blockdev-snapshot', node='drive0-backing',
  66                          overlay='drive0'))
  67
  68     iotests.log('Starting migration to B...')
  69     iotests.log(vm_a.qmp('migrate', uri='exec:cat >%s' % (fifo_a)))
  70     with iotests.Timeout(3, 'Migration does not complete'):
  71         # Wait for the source first (which includes setup=setup)
  72         vm_a.wait_migration('postmigrate')
  73         # Wait for the destination second (which does not)
  74         vm_b.wait_migration('running')
  75
  76     iotests.log(vm_a.qmp('query-migrate')['return']['status'])
  77     iotests.log(vm_b.qmp('query-migrate')['return']['status'])
  78
  79     iotests.log(vm_a.qmp('query-status'))
  80     iotests.log(vm_b.qmp('query-status'))
  81
  82     iotests.log('Add a second parent to drive0-file...')
  83     iotests.log(vm_b.qmp('blockdev-add', driver='raw', file='drive0-file',
  84                          node_name='drive0-raw'))
  85
  86     iotests.log('Restart A with -incoming and second parent...')
  87     vm_a.shutdown()
  88     (vm_a.add_blockdev('raw,file=drive0-file,node-name=drive0-raw')
  89          .add_incoming("exec: cat '%s'" % (fifo_b))
  90          .launch())
  91
  92     vm_a.enable_migration_events('A')
  93
  94     iotests.log(vm_a.qmp('blockdev-snapshot', node='drive0-backing',
  95                          overlay='drive0'))
  96
  97     iotests.log('Starting migration back to A...')
  98     iotests.log(vm_b.qmp('migrate', uri='exec:cat >%s' % (fifo_b)))
  99     with iotests.Timeout(3, 'Migration does not complete'):
 100         # Wait for the source first (which includes setup=setup)
 101         vm_b.wait_migration('postmigrate')
 102         # Wait for the destination second (which does not)
 103         vm_a.wait_migration('running')
 104
 105     iotests.log(vm_a.qmp('query-migrate')['return']['status'])
 106     iotests.log(vm_b.qmp('query-migrate')['return']['status'])
 107
 108     iotests.log(vm_a.qmp('query-status'))
 109     iotests.log(vm_b.qmp('query-status'))