qemu/tests/qemu-iotests/096

   1 #!/usr/bin/env python
   2 #
   3 # Test that snapshots move the throttling configuration to the active
   4 # layer
   5 #
   6 # Copyright (C) 2015 Igalia, S.L.
   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 import iotests
  23 import os
  24
  25 class TestLiveSnapshot(iotests.QMPTestCase):
  26     base_img = os.path.join(iotests.test_dir, 'base.img')
  27     target_img = os.path.join(iotests.test_dir, 'target.img')
  28     group = 'mygroup'
  29     iops = 6000
  30     iops_size = 1024
  31
  32     def setUp(self):
  33         opts = []
  34         opts.append('node-name=base')
  35         opts.append('throttling.group=%s' % self.group)
  36         opts.append('throttling.iops-total=%d' % self.iops)
  37         opts.append('throttling.iops-size=%d' % self.iops_size)
  38         iotests.qemu_img('create', '-f', iotests.imgfmt, self.base_img, '100M')
  39         self.vm = iotests.VM().add_drive(self.base_img, ','.join(opts))
  40         self.vm.launch()
  41
  42     def tearDown(self):
  43         self.vm.shutdown()
  44         os.remove(self.base_img)
  45         os.remove(self.target_img)
  46
  47     def checkConfig(self, active_layer):
  48         result = self.vm.qmp('query-named-block-nodes')
  49         for r in result['return']:
  50             if r['node-name'] == active_layer:
  51                 self.assertEqual(r['group'], self.group)
  52                 self.assertEqual(r['iops'], self.iops)
  53                 self.assertEqual(r['iops_size'], self.iops_size)
  54             else:
  55                 self.assertFalse(r.has_key('group'))
  56                 self.assertEqual(r['iops'], 0)
  57                 self.assertFalse(r.has_key('iops_size'))
  58
  59     def testSnapshot(self):
  60         self.checkConfig('base')
  61         self.vm.qmp('blockdev-snapshot-sync',
  62                     node_name = 'base',
  63                     snapshot_node_name = 'target',
  64                     snapshot_file = self.target_img,
  65                     format = iotests.imgfmt)
  66         self.checkConfig('target')
  67
  68 if __name__ == '__main__':
  69     iotests.main(supported_fmts=['qcow2'])