| 1 | #!/usr/bin/env python3 |
| 2 | # group: rw quick |
| 3 | # |
| 4 | # Tests for persistent dirty bitmaps. |
| 5 | # |
| 6 | # Copyright: Vladimir Sementsov-Ogievskiy 2015-2017 |
| 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 os |
| 23 | import re |
| 24 | import iotests |
| 25 | from iotests import qemu_img |
| 26 | |
| 27 | disk = os.path.join(iotests.test_dir, 'disk') |
| 28 | disk_size = 0x40000000 # 1G |
| 29 | |
| 30 | # regions for qemu_io: (start, count) in bytes |
| 31 | regions1 = ((0x0fff00, 0x10000), |
| 32 | (0x200000, 0x100000)) |
| 33 | |
| 34 | regions2 = ((0x10000000, 0x20000), |
| 35 | (0x3fff0000, 0x10000)) |
| 36 | |
| 37 | class TestPersistentDirtyBitmap(iotests.QMPTestCase): |
| 38 | |
| 39 | def setUp(self): |
| 40 | qemu_img('create', '-f', iotests.imgfmt, disk, str(disk_size)) |
| 41 | |
| 42 | def tearDown(self): |
| 43 | os.remove(disk) |
| 44 | |
| 45 | def mkVm(self): |
| 46 | return iotests.VM().add_drive(disk, opts='node-name=node0') |
| 47 | |
| 48 | def mkVmRo(self): |
| 49 | return iotests.VM().add_drive(disk, opts='readonly=on,node-name=node0') |
| 50 | |
| 51 | def getSha256(self): |
| 52 | result = self.vm.qmp('x-debug-block-dirty-bitmap-sha256', |
| 53 | node='drive0', name='bitmap0') |
| 54 | return result['return']['sha256'] |
| 55 | |
| 56 | def checkBitmap(self, sha256): |
| 57 | result = self.vm.qmp('x-debug-block-dirty-bitmap-sha256', |
| 58 | node='drive0', name='bitmap0') |
| 59 | self.assert_qmp(result, 'return/sha256', sha256); |
| 60 | |
| 61 | def writeRegions(self, regions): |
| 62 | for r in regions: |
| 63 | self.vm.hmp_qemu_io('drive0', |
| 64 | 'write %d %d' % r) |
| 65 | |
| 66 | def qmpAddBitmap(self): |
| 67 | self.vm.qmp('block-dirty-bitmap-add', node='drive0', |
| 68 | name='bitmap0', persistent=True) |
| 69 | |
| 70 | def test_persistent(self): |
| 71 | self.vm = self.mkVm() |
| 72 | self.vm.launch() |
| 73 | self.qmpAddBitmap() |
| 74 | |
| 75 | self.writeRegions(regions1) |
| 76 | sha256 = self.getSha256() |
| 77 | |
| 78 | self.vm.shutdown() |
| 79 | |
| 80 | self.vm = self.mkVmRo() |
| 81 | self.vm.launch() |
| 82 | self.vm.shutdown() |
| 83 | |
| 84 | #catch 'Persistent bitmaps are lost' possible error |
| 85 | log = iotests.filter_qtest(self.vm.get_log()) |
| 86 | if log: |
| 87 | print(log) |
| 88 | |
| 89 | self.vm = self.mkVm() |
| 90 | self.vm.launch() |
| 91 | |
| 92 | self.checkBitmap(sha256) |
| 93 | self.writeRegions(regions2) |
| 94 | sha256 = self.getSha256() |
| 95 | |
| 96 | self.vm.shutdown() |
| 97 | self.vm.launch() |
| 98 | |
| 99 | self.checkBitmap(sha256) |
| 100 | |
| 101 | self.vm.shutdown() |
| 102 | |
| 103 | def test_reopen_rw(self): |
| 104 | self.vm = self.mkVm() |
| 105 | self.vm.launch() |
| 106 | self.qmpAddBitmap() |
| 107 | |
| 108 | # Calculate hashes |
| 109 | |
| 110 | self.writeRegions(regions1) |
| 111 | sha256_1 = self.getSha256() |
| 112 | |
| 113 | self.writeRegions(regions2) |
| 114 | sha256_2 = self.getSha256() |
| 115 | assert sha256_1 != sha256_2 # Otherwise, it's not very interesting. |
| 116 | |
| 117 | self.vm.cmd('block-dirty-bitmap-clear', node='drive0', |
| 118 | name='bitmap0') |
| 119 | |
| 120 | # Start with regions1 |
| 121 | |
| 122 | self.writeRegions(regions1) |
| 123 | assert sha256_1 == self.getSha256() |
| 124 | |
| 125 | self.vm.shutdown() |
| 126 | |
| 127 | self.vm = self.mkVmRo() |
| 128 | self.vm.launch() |
| 129 | |
| 130 | assert sha256_1 == self.getSha256() |
| 131 | |
| 132 | # Check that we are in RO mode and can't modify bitmap. |
| 133 | self.writeRegions(regions2) |
| 134 | assert sha256_1 == self.getSha256() |
| 135 | |
| 136 | # Reopen to RW |
| 137 | self.vm.cmd('blockdev-reopen', options=[{ |
| 138 | 'node-name': 'node0', |
| 139 | 'driver': iotests.imgfmt, |
| 140 | 'file': { |
| 141 | 'driver': 'file', |
| 142 | 'filename': disk |
| 143 | }, |
| 144 | 'read-only': False |
| 145 | }]) |
| 146 | |
| 147 | # Check that bitmap is reopened to RW and we can write to it. |
| 148 | self.writeRegions(regions2) |
| 149 | assert sha256_2 == self.getSha256() |
| 150 | |
| 151 | self.vm.shutdown() |
| 152 | |
| 153 | |
| 154 | if __name__ == '__main__': |
| 155 | iotests.main(supported_fmts=['qcow2'], |
| 156 | supported_protocols=['file'], |
| 157 | unsupported_imgopts=['compat'], |
| 158 | require_hmp=True) |