LXR qemu/tests/qemu-iotests/234

   1#!/usr/bin/env python3
   2# group: quick migration
   3#
   4# Copyright (C) 2018 Red Hat, Inc.
   5#
   6# This program is free software; you can redistribute it and/or modify
   7# it under the terms of the GNU General Public License as published by
   8# the Free Software Foundation; either version 2 of the License, or
   9# (at your option) any later version.
  10#
  11# This program is distributed in the hope that it will be useful,
  12# but WITHOUT ANY WARRANTY; without even the implied warranty of
  13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14# GNU General Public License for more details.
  15#
  16# You should have received a copy of the GNU General Public License
  17# along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18#
  19# Creator/Owner: Kevin Wolf <kwolf@redhat.com>
  20#
  21# Check that block node activation and inactivation works with a block graph
  22# that is built with individually created nodes
  23
  24import iotests
  25import os
  26
  27iotests.script_initialize(supported_fmts=['qcow2'],
  28                          supported_platforms=['linux'])
  29
  30with iotests.FilePath('img') as img_path, \
  31     iotests.FilePath('backing') as backing_path, \
  32     iotests.FilePath('mig_fifo_a') as fifo_a, \
  33     iotests.FilePath('mig_fifo_b') as fifo_b, \
  34     iotests.VM(path_suffix='a') as vm_a, \
  35     iotests.VM(path_suffix='b') as vm_b:
  36
  37    iotests.qemu_img_create('-f', iotests.imgfmt, backing_path, '64M')
  38    iotests.qemu_img_create('-f', iotests.imgfmt, img_path, '64M')
  39
  40    os.mkfifo(fifo_a)
  41    os.mkfifo(fifo_b)
  42
  43    iotests.log('Launching source VM...')
  44    (vm_a.add_blockdev('file,filename=%s,node-name=drive0-file' % (img_path))
  45         .add_blockdev('%s,file=drive0-file,node-name=drive0' % (iotests.imgfmt))
  46         .add_blockdev('file,filename=%s,node-name=drive0-backing-file' % (backing_path))
  47         .add_blockdev('%s,file=drive0-backing-file,node-name=drive0-backing' % (iotests.imgfmt))
  48         .launch())
  49
  50    vm_a.enable_migration_events('A')
  51
  52    iotests.log('Launching destination VM...')
  53    (vm_b.add_blockdev('file,filename=%s,node-name=drive0-file' % (img_path))
  54         .add_blockdev('%s,file=drive0-file,node-name=drive0' % (iotests.imgfmt))
  55         .add_blockdev('file,filename=%s,node-name=drive0-backing-file' % (backing_path))
  56         .add_blockdev('%s,file=drive0-backing-file,node-name=drive0-backing' % (iotests.imgfmt))
  57         .add_incoming("exec: cat '%s'" % (fifo_a))
  58         .launch())
  59
  60    vm_b.enable_migration_events('B')
  61
  62    # Add a child node that was created after the parent node. The reverse case
  63    # is covered by the -blockdev options above.
  64    iotests.log(vm_a.qmp('blockdev-snapshot', node='drive0-backing',
  65                         overlay='drive0'))
  66    iotests.log(vm_b.qmp('blockdev-snapshot', node='drive0-backing',
  67                         overlay='drive0'))
  68
  69    iotests.log('Starting migration to B...')
  70    iotests.log(vm_a.qmp('migrate', uri='exec:cat >%s' % (fifo_a)))
  71    with iotests.Timeout(3, 'Migration does not complete'):
  72        # Wait for the source first (which includes setup=setup)
  73        vm_a.wait_migration('postmigrate')
  74        # Wait for the destination second (which does not)
  75        vm_b.wait_migration('running')
  76
  77    iotests.log(vm_a.qmp('query-migrate')['return']['status'])
  78    iotests.log(vm_b.qmp('query-migrate')['return']['status'])
  79
  80    iotests.log(vm_a.qmp('query-status'))
  81    iotests.log(vm_b.qmp('query-status'))
  82
  83    iotests.log('Add a second parent to drive0-file...')
  84    iotests.log(vm_b.qmp('blockdev-add', driver='raw', file='drive0-file',
  85                         node_name='drive0-raw'))
  86
  87    iotests.log('Restart A with -incoming and second parent...')
  88    vm_a.shutdown()
  89    (vm_a.add_blockdev('raw,file=drive0-file,node-name=drive0-raw')
  90         .add_incoming("exec: cat '%s'" % (fifo_b))
  91         .launch())
  92
  93    vm_a.enable_migration_events('A')
  94
  95    iotests.log(vm_a.qmp('blockdev-snapshot', node='drive0-backing',
  96                         overlay='drive0'))
  97
  98    iotests.log('Starting migration back to A...')
  99    iotests.log(vm_b.qmp('migrate', uri='exec:cat >%s' % (fifo_b)))
 100    with iotests.Timeout(3, 'Migration does not complete'):
 101        # Wait for the source first (which includes setup=setup)
 102        vm_b.wait_migration('postmigrate')
 103        # Wait for the destination second (which does not)
 104        vm_a.wait_migration('running')
 105
 106    iotests.log(vm_a.qmp('query-migrate')['return']['status'])
 107    iotests.log(vm_b.qmp('query-migrate')['return']['status'])
 108
 109    iotests.log(vm_a.qmp('query-status'))
 110    iotests.log(vm_b.qmp('query-status'))
 111