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e60edf69e2
This patch drops the 'x-' prefix from x-blockdev-reopen. Signed-off-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20210708114709.206487-7-kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
187 lines
6.1 KiB
Python
Executable File
187 lines
6.1 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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# Test for preallocate filter
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#
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# Copyright (c) 2020 Virtuozzo International GmbH.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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import os
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import iotests
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MiB = 1024 * 1024
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disk = os.path.join(iotests.test_dir, 'disk')
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overlay = os.path.join(iotests.test_dir, 'overlay')
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refdisk = os.path.join(iotests.test_dir, 'refdisk')
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drive_opts = f'node-name=disk,driver={iotests.imgfmt},' \
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f'file.node-name=filter,file.driver=preallocate,' \
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f'file.file.node-name=file,file.file.filename={disk}'
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class TestPreallocateBase(iotests.QMPTestCase):
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def setUp(self):
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iotests.qemu_img_create('-f', iotests.imgfmt, disk, str(10 * MiB))
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def tearDown(self):
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try:
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self.check_small()
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check = iotests.qemu_img_check(disk)
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self.assertFalse('leaks' in check)
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self.assertFalse('corruptions' in check)
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self.assertEqual(check['check-errors'], 0)
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finally:
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os.remove(disk)
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def check_big(self):
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self.assertTrue(os.path.getsize(disk) > 100 * MiB)
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def check_small(self):
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self.assertTrue(os.path.getsize(disk) < 10 * MiB)
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class TestQemuImg(TestPreallocateBase):
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def test_qemu_img(self):
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p = iotests.QemuIoInteractive('--image-opts', drive_opts)
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p.cmd('write 0 1M')
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p.cmd('flush')
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self.check_big()
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p.close()
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class TestPreallocateFilter(TestPreallocateBase):
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def setUp(self):
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super().setUp()
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self.vm = iotests.VM().add_drive(path=None, opts=drive_opts)
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self.vm.launch()
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def tearDown(self):
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self.vm.shutdown()
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super().tearDown()
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def test_prealloc(self):
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self.vm.hmp_qemu_io('drive0', 'write 0 1M')
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self.check_big()
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def test_external_snapshot(self):
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self.test_prealloc()
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result = self.vm.qmp('blockdev-snapshot-sync', node_name='disk',
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snapshot_file=overlay,
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snapshot_node_name='overlay')
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self.assert_qmp(result, 'return', {})
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# on reopen to r-o base preallocation should be dropped
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self.check_small()
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self.vm.hmp_qemu_io('drive0', 'write 1M 1M')
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result = self.vm.qmp('block-commit', device='overlay')
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self.assert_qmp(result, 'return', {})
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self.complete_and_wait()
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# commit of new megabyte should trigger preallocation
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self.check_big()
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def test_reopen_opts(self):
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result = self.vm.qmp('blockdev-reopen', options=[{
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'node-name': 'disk',
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'driver': iotests.imgfmt,
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'file': {
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'node-name': 'filter',
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'driver': 'preallocate',
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'prealloc-size': 20 * MiB,
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'prealloc-align': 5 * MiB,
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'file': {
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'node-name': 'file',
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'driver': 'file',
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'filename': disk
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}
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}
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}])
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self.assert_qmp(result, 'return', {})
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self.vm.hmp_qemu_io('drive0', 'write 0 1M')
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self.assertTrue(os.path.getsize(disk) == 25 * MiB)
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class TestTruncate(iotests.QMPTestCase):
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def setUp(self):
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iotests.qemu_img_create('-f', iotests.imgfmt, disk, str(10 * MiB))
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iotests.qemu_img_create('-f', iotests.imgfmt, refdisk, str(10 * MiB))
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def tearDown(self):
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os.remove(disk)
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os.remove(refdisk)
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def do_test(self, prealloc_mode, new_size):
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ret = iotests.qemu_io_silent('--image-opts', '-c', 'write 0 10M', '-c',
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f'truncate -m {prealloc_mode} {new_size}',
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drive_opts)
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self.assertEqual(ret, 0)
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ret = iotests.qemu_io_silent('-f', iotests.imgfmt, '-c', 'write 0 10M',
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'-c',
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f'truncate -m {prealloc_mode} {new_size}',
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refdisk)
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self.assertEqual(ret, 0)
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stat = os.stat(disk)
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refstat = os.stat(refdisk)
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# Probably we'll want preallocate filter to keep align to cluster when
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# shrink preallocation, so, ignore small differece
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self.assertLess(abs(stat.st_size - refstat.st_size), 64 * 1024)
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# Preallocate filter may leak some internal clusters (for example, if
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# guest write far over EOF, skipping some clusters - they will remain
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# fallocated, preallocate filter don't care about such leaks, it drops
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# only trailing preallocation.
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self.assertLess(abs(stat.st_blocks - refstat.st_blocks) * 512,
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1024 * 1024)
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def test_real_shrink(self):
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self.do_test('off', '5M')
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def test_truncate_inside_preallocated_area__falloc(self):
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self.do_test('falloc', '50M')
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def test_truncate_inside_preallocated_area__metadata(self):
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self.do_test('metadata', '50M')
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def test_truncate_inside_preallocated_area__full(self):
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self.do_test('full', '50M')
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def test_truncate_inside_preallocated_area__off(self):
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self.do_test('off', '50M')
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def test_truncate_over_preallocated_area__falloc(self):
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self.do_test('falloc', '150M')
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def test_truncate_over_preallocated_area__metadata(self):
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self.do_test('metadata', '150M')
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def test_truncate_over_preallocated_area__full(self):
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self.do_test('full', '150M')
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def test_truncate_over_preallocated_area__off(self):
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self.do_test('off', '150M')
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if __name__ == '__main__':
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iotests.main(supported_fmts=['qcow2'], required_fmts=['preallocate'])
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