tests/qemu-iotests/132

   1 #!/usr/bin/env python
   2 #
   3 # Test mirror with unmap
   4 #
   5 # Copyright (C) 2015 Red Hat, Inc.
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 2 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 #
  20
  21 import time
  22 import os
  23 import iotests
  24 from iotests import qemu_img, qemu_io
  25
  26 test_img = os.path.join(iotests.test_dir, 'test.img')
  27 target_img = os.path.join(iotests.test_dir, 'target.img')
  28
  29 class TestSingleDrive(iotests.QMPTestCase):
  30     image_len = 2 * 1024 * 1024 # MB
  31
  32     def setUp(self):
  33         # Write data to the image so we can compare later
  34         qemu_img('create', '-f', iotests.imgfmt, test_img, str(TestSingleDrive.image_len))
  35         qemu_io('-f', iotests.imgfmt, '-c', 'write -P0x5d 0 2M', test_img)
  36
  37         self.vm = iotests.VM().add_drive(test_img, 'discard=unmap')
  38         self.vm.launch()
  39
  40     def tearDown(self):
  41         self.vm.shutdown()
  42         os.remove(test_img)
  43         try:
  44             os.remove(target_img)
  45         except OSError:
  46             pass
  47
  48     def test_mirror_discard(self):
  49         result = self.vm.qmp('drive-mirror', device='drive0', sync='full',
  50                              target=target_img)
  51         self.assert_qmp(result, 'return', {})
  52         self.vm.hmp_qemu_io('drive0', 'discard 0 64k')
  53         self.complete_and_wait('drive0')
  54         self.vm.shutdown()
  55         self.assertTrue(iotests.compare_images(test_img, target_img),
  56                         'target image does not match source after mirroring')
  57
  58 if __name__ == '__main__':
  59     iotests.main(supported_fmts=['raw', 'qcow2'])