tests/qemu-iotests/040

   1 #!/usr/bin/env python
   2 #
   3 # Tests for image block commit.
   4 #
   5 # Copyright (C) 2012 IBM, Corp.
   6 # Copyright (C) 2012 Red Hat, Inc.
   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 # Test for live block commit
  22 # Derived from Image Streaming Test 030
  23
  24 import time
  25 import os
  26 import iotests
  27 from iotests import qemu_img, qemu_io
  28 import struct
  29
  30 backing_img = os.path.join(iotests.test_dir, 'backing.img')
  31 mid_img = os.path.join(iotests.test_dir, 'mid.img')
  32 test_img = os.path.join(iotests.test_dir, 'test.img')
  33
  34 class ImageCommitTestCase(iotests.QMPTestCase):
  35     '''Abstract base class for image commit test cases'''
  36
  37     def assert_no_active_commit(self):
  38         result = self.vm.qmp('query-block-jobs')
  39         self.assert_qmp(result, 'return', [])
  40
  41     def cancel_and_wait(self, drive='drive0'):
  42         '''Cancel a block job and wait for it to finish'''
  43         result = self.vm.qmp('block-job-cancel', device=drive)
  44         self.assert_qmp(result, 'return', {})
  45
  46         cancelled = False
  47         while not cancelled:
  48             for event in self.vm.get_qmp_events(wait=True):
  49                 if event['event'] == 'BLOCK_JOB_CANCELLED':
  50                     self.assert_qmp(event, 'data/type', 'commit')
  51                     self.assert_qmp(event, 'data/device', drive)
  52                     cancelled = True
  53
  54         self.assert_no_active_commit()
  55
  56     def create_image(self, name, size):
  57         file = open(name, 'w')
  58         i = 0
  59         while i < size:
  60             sector = struct.pack('>l504xl', i / 512, i / 512)
  61             file.write(sector)
  62             i = i + 512
  63         file.close()
  64
  65
  66 class TestSingleDrive(ImageCommitTestCase):
  67     image_len = 1 * 1024 * 1024
  68     test_len = 1 * 1024 * 256
  69
  70     def setUp(self):
  71         self.create_image(backing_img, TestSingleDrive.image_len)
  72         qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, mid_img)
  73         qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % mid_img, test_img)
  74         qemu_io('-c', 'write -P 0xab 0 524288', backing_img)
  75         qemu_io('-c', 'write -P 0xef 524288 524288', mid_img)
  76         self.vm = iotests.VM().add_drive(test_img)
  77         self.vm.launch()
  78
  79     def tearDown(self):
  80         self.vm.shutdown()
  81         os.remove(test_img)
  82         os.remove(mid_img)
  83         os.remove(backing_img)
  84
  85     def test_commit(self):
  86         self.assert_no_active_commit()
  87         result = self.vm.qmp('block-commit', device='drive0', top='%s' % mid_img)
  88         self.assert_qmp(result, 'return', {})
  89
  90         completed = False
  91         while not completed:
  92             for event in self.vm.get_qmp_events(wait=True):
  93                 if event['event'] == 'BLOCK_JOB_COMPLETED':
  94                     self.assert_qmp(event, 'data/type', 'commit')
  95                     self.assert_qmp(event, 'data/device', 'drive0')
  96                     self.assert_qmp(event, 'data/offset', self.image_len)
  97                     self.assert_qmp(event, 'data/len', self.image_len)
  98                     completed = True
  99
 100         self.assert_no_active_commit()
 101         self.vm.shutdown()
 102
 103         self.assertEqual(-1, qemu_io('-c', 'read -P 0xab 0 524288', backing_img).find("verification failed"))
 104         self.assertEqual(-1, qemu_io('-c', 'read -P 0xef 524288 524288', backing_img).find("verification failed"))
 105
 106     def test_device_not_found(self):
 107         result = self.vm.qmp('block-commit', device='nonexistent', top='%s' % mid_img)
 108         self.assert_qmp(result, 'error/class', 'DeviceNotFound')
 109
 110     def test_top_same_base(self):
 111         self.assert_no_active_commit()
 112         result = self.vm.qmp('block-commit', device='drive0', top='%s' % backing_img, base='%s' % backing_img)
 113         self.assert_qmp(result, 'error/class', 'GenericError')
 114         self.assert_qmp(result, 'error/desc', 'Invalid files for merge: top and base are the same')
 115
 116     def test_top_invalid(self):
 117         self.assert_no_active_commit()
 118         result = self.vm.qmp('block-commit', device='drive0', top='badfile', base='%s' % backing_img)
 119         self.assert_qmp(result, 'error/class', 'GenericError')
 120         self.assert_qmp(result, 'error/desc', 'Top image file badfile not found')
 121
 122     def test_base_invalid(self):
 123         self.assert_no_active_commit()
 124         result = self.vm.qmp('block-commit', device='drive0', top='%s' % mid_img, base='badfile')
 125         self.assert_qmp(result, 'error/class', 'GenericError')
 126         self.assert_qmp(result, 'error/desc', 'Base \'badfile\' not found')
 127
 128     def test_top_is_active(self):
 129         self.assert_no_active_commit()
 130         result = self.vm.qmp('block-commit', device='drive0', top='%s' % test_img, base='%s' % backing_img)
 131         self.assert_qmp(result, 'error/class', 'GenericError')
 132         self.assert_qmp(result, 'error/desc', 'Top image as the active layer is currently unsupported')
 133
 134     def test_top_and_base_reversed(self):
 135         self.assert_no_active_commit()
 136         result = self.vm.qmp('block-commit', device='drive0', top='%s' % backing_img, base='%s' % mid_img)
 137         self.assert_qmp(result, 'error/class', 'GenericError')
 138         self.assert_qmp(result, 'error/desc', 'Base (%(1)s) is not reachable from top (%(2)s)' % {"1" : mid_img, "2" : backing_img})
 139
 140     def test_top_omitted(self):
 141         self.assert_no_active_commit()
 142         result = self.vm.qmp('block-commit', device='drive0')
 143         self.assert_qmp(result, 'error/class', 'GenericError')
 144         self.assert_qmp(result, 'error/desc', "Parameter 'top' is missing")
 145
 146
 147 class TestSetSpeed(ImageCommitTestCase):
 148     image_len = 80 * 1024 * 1024 # MB
 149
 150     def setUp(self):
 151         qemu_img('create', backing_img, str(TestSetSpeed.image_len))
 152         qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, mid_img)
 153         qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % mid_img, test_img)
 154         self.vm = iotests.VM().add_drive(test_img)
 155         self.vm.launch()
 156
 157     def tearDown(self):
 158         self.vm.shutdown()
 159         os.remove(test_img)
 160         os.remove(mid_img)
 161         os.remove(backing_img)
 162
 163     def test_set_speed(self):
 164         self.assert_no_active_commit()
 165
 166         result = self.vm.qmp('block-commit', device='drive0', top=mid_img, speed=1024 * 1024)
 167         self.assert_qmp(result, 'return', {})
 168
 169         # Ensure the speed we set was accepted
 170         result = self.vm.qmp('query-block-jobs')
 171         self.assert_qmp(result, 'return[0]/device', 'drive0')
 172         self.assert_qmp(result, 'return[0]/speed', 1024 * 1024)
 173
 174         self.cancel_and_wait()
 175
 176
 177 if __name__ == '__main__':
 178     iotests.main(supported_fmts=['qcow2', 'qed'])