qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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      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 = self.vm.get_log()
     86         log = re.sub(r'^\[I \d+\.\d+\] OPENED\n', '', log)
     87         log = re.sub(r'\[I \+\d+\.\d+\] CLOSED\n?$', '', log)
     88         if log:
     89             print(log)
     90 
     91         self.vm = self.mkVm()
     92         self.vm.launch()
     93 
     94         self.checkBitmap(sha256)
     95         self.writeRegions(regions2)
     96         sha256 = self.getSha256()
     97 
     98         self.vm.shutdown()
     99         self.vm.launch()
    100 
    101         self.checkBitmap(sha256)
    102 
    103         self.vm.shutdown()
    104 
    105     def test_reopen_rw(self):
    106         self.vm = self.mkVm()
    107         self.vm.launch()
    108         self.qmpAddBitmap()
    109 
    110         # Calculate hashes
    111 
    112         self.writeRegions(regions1)
    113         sha256_1 = self.getSha256()
    114 
    115         self.writeRegions(regions2)
    116         sha256_2 = self.getSha256()
    117         assert sha256_1 != sha256_2 # Otherwise, it's not very interesting.
    118 
    119         result = self.vm.qmp('block-dirty-bitmap-clear', node='drive0',
    120                              name='bitmap0')
    121         self.assert_qmp(result, 'return', {})
    122 
    123         # Start with regions1
    124 
    125         self.writeRegions(regions1)
    126         assert sha256_1 == self.getSha256()
    127 
    128         self.vm.shutdown()
    129 
    130         self.vm = self.mkVmRo()
    131         self.vm.launch()
    132 
    133         assert sha256_1 == self.getSha256()
    134 
    135         # Check that we are in RO mode and can't modify bitmap.
    136         self.writeRegions(regions2)
    137         assert sha256_1 == self.getSha256()
    138 
    139         # Reopen to RW
    140         result = self.vm.qmp('blockdev-reopen', options=[{
    141             'node-name': 'node0',
    142             'driver': iotests.imgfmt,
    143             'file': {
    144                 'driver': 'file',
    145                 'filename': disk
    146             },
    147             'read-only': False
    148         }])
    149         self.assert_qmp(result, 'return', {})
    150 
    151         # Check that bitmap is reopened to RW and we can write to it.
    152         self.writeRegions(regions2)
    153         assert sha256_2 == self.getSha256()
    154 
    155         self.vm.shutdown()
    156 
    157 
    158 if __name__ == '__main__':
    159     iotests.main(supported_fmts=['qcow2'],
    160                  supported_protocols=['file'],
    161                  unsupported_imgopts=['compat'])