tests/qemu-iotests/096

   1 #!/usr/bin/env python3
   2 # group: rw quick
   3 #
   4 # Test that snapshots move the throttling configuration to the active
   5 # layer
   6 #
   7 # Copyright (C) 2015 Igalia, S.L.
   8 #
   9 # This program is free software; you can redistribute it and/or modify
  10 # it under the terms of the GNU General Public License as published by
  11 # the Free Software Foundation; either version 2 of the License, or
  12 # (at your option) any later version.
  13 #
  14 # This program is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 # GNU General Public License for more details.
  18 #
  19 # You should have received a copy of the GNU General Public License
  20 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 #
  22
  23 import iotests
  24 import os
  25
  26 class TestLiveSnapshot(iotests.QMPTestCase):
  27     base_img = os.path.join(iotests.test_dir, 'base.img')
  28     target_img = os.path.join(iotests.test_dir, 'target.img')
  29     group = 'mygroup'
  30     iops = 6000
  31     iops_size = 1024
  32
  33     def setUp(self):
  34         opts = []
  35         opts.append('node-name=base')
  36         opts.append('throttling.group=%s' % self.group)
  37         opts.append('throttling.iops-total=%d' % self.iops)
  38         opts.append('throttling.iops-size=%d' % self.iops_size)
  39         iotests.qemu_img('create', '-f', iotests.imgfmt, self.base_img, '100M')
  40         self.vm = iotests.VM().add_drive(self.base_img, ','.join(opts))
  41         self.vm.launch()
  42
  43     def tearDown(self):
  44         self.vm.shutdown()
  45         os.remove(self.base_img)
  46         os.remove(self.target_img)
  47
  48     def checkConfig(self, active_layer):
  49         result = self.vm.qmp('query-block')
  50         for r in result['return']:
  51             r = r['inserted']
  52             if r['node-name'] == active_layer:
  53                 self.assertEqual(r['group'], self.group)
  54                 self.assertEqual(r['iops'], self.iops)
  55                 self.assertEqual(r['iops_size'], self.iops_size)
  56             else:
  57                 self.assertFalse('group' in r)
  58                 self.assertEqual(r['iops'], 0)
  59                 self.assertFalse('iops_size' in r)
  60
  61     def testSnapshot(self):
  62         self.checkConfig('base')
  63         self.vm.qmp('blockdev-snapshot-sync',
  64                     node_name = 'base',
  65                     snapshot_node_name = 'target',
  66                     snapshot_file = self.target_img,
  67                     format = iotests.imgfmt)
  68         self.checkConfig('target')
  69
  70 if __name__ == '__main__':
  71     iotests.main(supported_fmts=['qcow2'],
  72                  supported_protocols=['file'])