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# Copyright (C) 2018 Facebook
#
# This file is part of libbtrfsutil.
#
# libbtrfsutil is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# libbtrfsutil is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with libbtrfsutil. If not, see <http://www.gnu.org/licenses/>.
import os
import time
import btrfsutil
from tests import BtrfsTestCase, HAVE_PATH_LIKE
def touch(path):
now = time.time()
os.utime(path, (now, now))
class TestSubvolume(BtrfsTestCase):
def super_generation(self):
with open(self.image, 'rb') as f:
# csum is 32 bytes, fsid is 16 bytes, bytenr is 8 bytes, flags is 8
# bytes
f.seek(65536 + 32 + 16 + 8 + 8)
self.assertEqual(f.read(8), b'_BHRfS_M')
return int.from_bytes(f.read(8), 'little')
def test_sync(self):
old_generation = self.super_generation()
for arg in self.path_or_fd(self.mountpoint):
with self.subTest(type=type(arg)):
touch(arg)
btrfsutil.sync(arg)
new_generation = self.super_generation()
self.assertGreater(new_generation, old_generation)
old_generation = new_generation
def test_start_sync(self):
old_generation = self.super_generation()
for arg in self.path_or_fd(self.mountpoint):
with self.subTest(type=type(arg)):
touch(arg)
transid = btrfsutil.start_sync(arg)
self.assertGreater(transid, old_generation)
def test_wait_sync(self):
old_generation = self.super_generation()
for arg in self.path_or_fd(self.mountpoint):
with self.subTest(type=type(arg)):
touch(arg)
transid = btrfsutil.start_sync(arg)
btrfsutil.wait_sync(arg, transid)
new_generation = self.super_generation()
self.assertGreater(new_generation, old_generation)
old_generation = new_generation
touch(arg)
btrfsutil.start_sync(arg)
btrfsutil.wait_sync(arg)
new_generation = self.super_generation()
self.assertGreater(new_generation, old_generation)
old_generation = new_generation
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