示例#1
0
class TestImage(object):
    def setUp(self):
        self.rbd = RBD()
        create_image()
        self.image = Image(ioctx, image_name)

    def tearDown(self):
        self.image.close()
        remove_image()

    @require_new_format()
    @blacklist_features([RBD_FEATURE_EXCLUSIVE_LOCK])
    def test_update_features(self):
        features = self.image.features()
        self.image.update_features(RBD_FEATURE_EXCLUSIVE_LOCK, True)
        eq(features | RBD_FEATURE_EXCLUSIVE_LOCK, self.image.features())

    @require_features([RBD_FEATURE_STRIPINGV2])
    def test_create_with_params(self):
        global features
        image_name = get_temp_image_name()
        order = 20
        stripe_unit = 1 << 20
        stripe_count = 10
        self.rbd.create(ioctx, image_name, IMG_SIZE, order, False, features,
                        stripe_unit, stripe_count)
        image = Image(ioctx, image_name)
        info = image.stat()
        check_stat(info, IMG_SIZE, order)
        eq(image.features(), features)
        eq(image.stripe_unit(), stripe_unit)
        eq(image.stripe_count(), stripe_count)
        image.close()
        RBD().remove(ioctx, image_name)

    def test_invalidate_cache(self):
        self.image.write(b'abc', 0)
        eq(b'abc', self.image.read(0, 3))
        self.image.invalidate_cache()
        eq(b'abc', self.image.read(0, 3))

    def test_stat(self):
        info = self.image.stat()
        check_stat(info, IMG_SIZE, IMG_ORDER)

    def test_flags(self):
        flags = self.image.flags()
        eq(0, flags)

    def test_write(self):
        data = rand_data(256)
        self.image.write(data, 0)

    def test_write_with_fadvise_flags(self):
        data = rand_data(256)
        self.image.write(data, 0, LIBRADOS_OP_FLAG_FADVISE_DONTNEED)
        self.image.write(data, 0, LIBRADOS_OP_FLAG_FADVISE_NOCACHE)

    def test_read(self):
        data = self.image.read(0, 20)
        eq(data, b'\0' * 20)

    def test_read_with_fadvise_flags(self):
        data = self.image.read(0, 20, LIBRADOS_OP_FLAG_FADVISE_DONTNEED)
        eq(data, b'\0' * 20)
        data = self.image.read(0, 20, LIBRADOS_OP_FLAG_FADVISE_RANDOM)
        eq(data, b'\0' * 20)

    def test_large_write(self):
        data = rand_data(IMG_SIZE)
        self.image.write(data, 0)

    def test_large_read(self):
        data = self.image.read(0, IMG_SIZE)
        eq(data, b'\0' * IMG_SIZE)

    def test_write_read(self):
        data = rand_data(256)
        offset = 50
        self.image.write(data, offset)
        read = self.image.read(offset, 256)
        eq(data, read)

    def test_read_bad_offset(self):
        assert_raises(InvalidArgument, self.image.read, IMG_SIZE + 1, IMG_SIZE)

    def test_resize(self):
        new_size = IMG_SIZE * 2
        self.image.resize(new_size)
        info = self.image.stat()
        check_stat(info, new_size, IMG_ORDER)

    def test_size(self):
        eq(IMG_SIZE, self.image.size())
        self.image.create_snap('snap1')
        new_size = IMG_SIZE * 2
        self.image.resize(new_size)
        eq(new_size, self.image.size())
        self.image.create_snap('snap2')
        self.image.set_snap('snap2')
        eq(new_size, self.image.size())
        self.image.set_snap('snap1')
        eq(IMG_SIZE, self.image.size())
        self.image.set_snap(None)
        eq(new_size, self.image.size())
        self.image.remove_snap('snap1')
        self.image.remove_snap('snap2')

    def test_resize_down(self):
        new_size = IMG_SIZE // 2
        data = rand_data(256)
        self.image.write(data, IMG_SIZE // 2)
        self.image.resize(new_size)
        self.image.resize(IMG_SIZE)
        read = self.image.read(IMG_SIZE // 2, 256)
        eq(b'\0' * 256, read)

    def test_resize_bytes(self):
        new_size = IMG_SIZE // 2 - 5
        data = rand_data(256)
        self.image.write(data, IMG_SIZE // 2 - 10)
        self.image.resize(new_size)
        self.image.resize(IMG_SIZE)
        read = self.image.read(IMG_SIZE // 2 - 10, 5)
        eq(data[:5], read)
        read = self.image.read(IMG_SIZE // 2 - 5, 251)
        eq(b'\0' * 251, read)

    def _test_copy(self,
                   features=None,
                   order=None,
                   stripe_unit=None,
                   stripe_count=None):
        global ioctx
        data = rand_data(256)
        self.image.write(data, 256)
        image_name = get_temp_image_name()
        if features is None:
            self.image.copy(ioctx, image_name)
        elif order is None:
            self.image.copy(ioctx, image_name, features)
        elif stripe_unit is None:
            self.image.copy(ioctx, image_name, features, order)
        elif stripe_count is None:
            self.image.copy(ioctx, image_name, features, order, stripe_unit)
        else:
            self.image.copy(ioctx, image_name, features, order, stripe_unit,
                            stripe_count)
        assert_raises(ImageExists, self.image.copy, ioctx, image_name)
        copy = Image(ioctx, image_name)
        copy_data = copy.read(256, 256)
        copy.close()
        self.rbd.remove(ioctx, image_name)
        eq(data, copy_data)

    def test_copy(self):
        self._test_copy()

    def test_copy2(self):
        self._test_copy(self.image.features(), self.image.stat()['order'])

    @require_features([RBD_FEATURE_STRIPINGV2])
    def test_copy3(self):
        global features
        self._test_copy(features,
                        self.image.stat()['order'], self.image.stripe_unit(),
                        self.image.stripe_count())

    def test_create_snap(self):
        global ioctx
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        at_snapshot = Image(ioctx, image_name, 'snap1')
        snap_data = at_snapshot.read(0, 256)
        at_snapshot.close()
        eq(snap_data, b'\0' * 256)
        self.image.remove_snap('snap1')

    def test_list_snaps(self):
        eq([], list(self.image.list_snaps()))
        self.image.create_snap('snap1')
        eq(['snap1'], [snap['name'] for snap in self.image.list_snaps()])
        self.image.create_snap('snap2')
        eq(['snap1', 'snap2'],
           [snap['name'] for snap in self.image.list_snaps()])
        self.image.remove_snap('snap1')
        self.image.remove_snap('snap2')

    def test_remove_snap(self):
        eq([], list(self.image.list_snaps()))
        self.image.create_snap('snap1')
        eq(['snap1'], [snap['name'] for snap in self.image.list_snaps()])
        self.image.remove_snap('snap1')
        eq([], list(self.image.list_snaps()))

    def test_rename_snap(self):
        eq([], list(self.image.list_snaps()))
        self.image.create_snap('snap1')
        eq(['snap1'], [snap['name'] for snap in self.image.list_snaps()])
        self.image.rename_snap("snap1", "snap1-rename")
        eq(['snap1-rename'],
           [snap['name'] for snap in self.image.list_snaps()])
        self.image.remove_snap('snap1-rename')
        eq([], list(self.image.list_snaps()))

    @require_features([RBD_FEATURE_LAYERING])
    def test_protect_snap(self):
        self.image.create_snap('snap1')
        assert (not self.image.is_protected_snap('snap1'))
        self.image.protect_snap('snap1')
        assert (self.image.is_protected_snap('snap1'))
        assert_raises(ImageBusy, self.image.remove_snap, 'snap1')
        self.image.unprotect_snap('snap1')
        assert (not self.image.is_protected_snap('snap1'))
        self.image.remove_snap('snap1')
        assert_raises(ImageNotFound, self.image.unprotect_snap, 'snap1')
        assert_raises(ImageNotFound, self.image.is_protected_snap, 'snap1')

    @require_features([RBD_FEATURE_EXCLUSIVE_LOCK])
    def test_remove_with_exclusive_lock(self):
        assert_raises(ImageBusy, remove_image)

    @blacklist_features([RBD_FEATURE_EXCLUSIVE_LOCK])
    def test_remove_with_snap(self):
        self.image.create_snap('snap1')
        assert_raises(ImageHasSnapshots, remove_image)
        self.image.remove_snap('snap1')

    @blacklist_features([RBD_FEATURE_EXCLUSIVE_LOCK])
    def test_remove_with_watcher(self):
        data = rand_data(256)
        self.image.write(data, 0)
        assert_raises(ImageBusy, remove_image)
        read = self.image.read(0, 256)
        eq(read, data)

    def test_rollback_to_snap(self):
        self.image.write(b'\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.rollback_to_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        self.image.remove_snap('snap1')

    def test_rollback_to_snap_sparse(self):
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.rollback_to_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        self.image.remove_snap('snap1')

    def test_rollback_with_resize(self):
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, data)
        new_size = IMG_SIZE * 2
        self.image.resize(new_size)
        check_stat(self.image.stat(), new_size, IMG_ORDER)
        self.image.write(data, new_size - 256)
        self.image.create_snap('snap2')
        read = self.image.read(new_size - 256, 256)
        eq(read, data)
        self.image.rollback_to_snap('snap1')
        check_stat(self.image.stat(), IMG_SIZE, IMG_ORDER)
        assert_raises(InvalidArgument, self.image.read, new_size - 256, 256)
        self.image.rollback_to_snap('snap2')
        check_stat(self.image.stat(), new_size, IMG_ORDER)
        read = self.image.read(new_size - 256, 256)
        eq(read, data)
        self.image.remove_snap('snap1')
        self.image.remove_snap('snap2')

    def test_set_snap(self):
        self.image.write(b'\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        self.image.remove_snap('snap1')

    def test_set_no_snap(self):
        self.image.write(b'\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        self.image.set_snap(None)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.remove_snap('snap1')

    def test_set_snap_sparse(self):
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        self.image.remove_snap('snap1')

    def test_many_snaps(self):
        num_snaps = 200
        for i in range(num_snaps):
            self.image.create_snap(str(i))
        snaps = sorted(self.image.list_snaps(),
                       key=lambda snap: int(snap['name']))
        eq(len(snaps), num_snaps)
        for i, snap in enumerate(snaps):
            eq(snap['size'], IMG_SIZE)
            eq(snap['name'], str(i))
        for i in range(num_snaps):
            self.image.remove_snap(str(i))

    def test_set_snap_deleted(self):
        self.image.write(b'\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        self.image.remove_snap('snap1')
        assert_raises(ImageNotFound, self.image.read, 0, 256)
        self.image.set_snap(None)
        read = self.image.read(0, 256)
        eq(read, data)

    def test_set_snap_recreated(self):
        self.image.write(b'\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        self.image.remove_snap('snap1')
        self.image.create_snap('snap1')
        assert_raises(ImageNotFound, self.image.read, 0, 256)
        self.image.set_snap(None)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.remove_snap('snap1')

    def test_lock_unlock(self):
        assert_raises(ImageNotFound, self.image.unlock, '')
        self.image.lock_exclusive('')
        assert_raises(ImageExists, self.image.lock_exclusive, '')
        assert_raises(ImageBusy, self.image.lock_exclusive, 'test')
        assert_raises(ImageExists, self.image.lock_shared, '', '')
        assert_raises(ImageBusy, self.image.lock_shared, 'foo', '')
        self.image.unlock('')

    def test_list_lockers(self):
        eq([], self.image.list_lockers())
        self.image.lock_exclusive('test')
        lockers = self.image.list_lockers()
        eq(1, len(lockers['lockers']))
        _, cookie, _ = lockers['lockers'][0]
        eq(cookie, 'test')
        eq('', lockers['tag'])
        assert lockers['exclusive']
        self.image.unlock('test')
        eq([], self.image.list_lockers())

        num_shared = 10
        for i in range(num_shared):
            self.image.lock_shared(str(i), 'tag')
        lockers = self.image.list_lockers()
        eq('tag', lockers['tag'])
        assert not lockers['exclusive']
        eq(num_shared, len(lockers['lockers']))
        cookies = sorted(map(lambda x: x[1], lockers['lockers']))
        for i in range(num_shared):
            eq(str(i), cookies[i])
            self.image.unlock(str(i))
        eq([], self.image.list_lockers())

    def test_diff_iterate(self):
        check_diff(self.image, 0, IMG_SIZE, None, [])
        self.image.write(b'a' * 256, 0)
        check_diff(self.image, 0, IMG_SIZE, None, [(0, 256, True)])
        self.image.write(b'b' * 256, 256)
        check_diff(self.image, 0, IMG_SIZE, None, [(0, 512, True)])
        self.image.discard(128, 256)
        check_diff(self.image, 0, IMG_SIZE, None, [(0, 512, True)])

        self.image.create_snap('snap1')
        self.image.discard(0, 1 << IMG_ORDER)
        self.image.create_snap('snap2')
        self.image.set_snap('snap2')
        check_diff(self.image, 0, IMG_SIZE, 'snap1', [(0, 512, False)])
        self.image.remove_snap('snap1')
        self.image.remove_snap('snap2')
示例#2
0
class TestImage(object):
    def setUp(self):
        self.rbd = RBD()
        create_image()
        self.image = Image(ioctx, IMG_NAME)

    def tearDown(self):
        self.image.close()
        remove_image()

    def test_stat(self):
        info = self.image.stat()
        check_stat(info, IMG_SIZE, IMG_ORDER)

    def test_write(self):
        data = rand_data(256)
        self.image.write(data, 0)

    def test_read(self):
        data = self.image.read(0, 20)
        eq(data, "\0" * 20)

    def test_large_write(self):
        data = rand_data(IMG_SIZE)
        self.image.write(data, 0)

    def test_large_read(self):
        data = self.image.read(0, IMG_SIZE)
        eq(data, "\0" * IMG_SIZE)

    def test_write_read(self):
        data = rand_data(256)
        offset = 50
        self.image.write(data, offset)
        read = self.image.read(offset, 256)
        eq(data, read)

    def test_read_bad_offset(self):
        assert_raises(InvalidArgument, self.image.read, IMG_SIZE + 1, IMG_SIZE)

    def test_resize(self):
        new_size = IMG_SIZE * 2
        self.image.resize(new_size)
        info = self.image.stat()
        check_stat(info, new_size, IMG_ORDER)

    def test_size(self):
        eq(IMG_SIZE, self.image.size())
        self.image.create_snap("snap1")
        new_size = IMG_SIZE * 2
        self.image.resize(new_size)
        eq(new_size, self.image.size())
        self.image.create_snap("snap2")
        self.image.set_snap("snap2")
        eq(new_size, self.image.size())
        self.image.set_snap("snap1")
        eq(IMG_SIZE, self.image.size())
        self.image.set_snap(None)
        eq(new_size, self.image.size())
        self.image.remove_snap("snap1")
        self.image.remove_snap("snap2")

    def test_resize_down(self):
        new_size = IMG_SIZE / 2
        data = rand_data(256)
        self.image.write(data, IMG_SIZE / 2)
        self.image.resize(new_size)
        self.image.resize(IMG_SIZE)
        read = self.image.read(IMG_SIZE / 2, 256)
        eq("\0" * 256, read)

    def test_resize_bytes(self):
        new_size = IMG_SIZE / 2 - 5
        data = rand_data(256)
        self.image.write(data, IMG_SIZE / 2 - 10)
        self.image.resize(new_size)
        self.image.resize(IMG_SIZE)
        read = self.image.read(IMG_SIZE / 2 - 10, 5)
        eq(data[:5], read)
        read = self.image.read(IMG_SIZE / 2 - 5, 251)
        eq("\0" * 251, read)

    def test_copy(self):
        global ioctx
        data = rand_data(256)
        self.image.write(data, 256)
        self.image.copy(ioctx, IMG_NAME + "2")
        assert_raises(ImageExists, self.image.copy, ioctx, IMG_NAME + "2")
        copy = Image(ioctx, IMG_NAME + "2")
        copy_data = copy.read(256, 256)
        copy.close()
        self.rbd.remove(ioctx, IMG_NAME + "2")
        eq(data, copy_data)

    def test_create_snap(self):
        global ioctx
        self.image.create_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, "\0" * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        at_snapshot = Image(ioctx, IMG_NAME, "snap1")
        snap_data = at_snapshot.read(0, 256)
        at_snapshot.close()
        eq(snap_data, "\0" * 256)
        self.image.remove_snap("snap1")

    def test_list_snaps(self):
        eq([], list(self.image.list_snaps()))
        self.image.create_snap("snap1")
        eq(["snap1"], map(lambda snap: snap["name"], self.image.list_snaps()))
        self.image.create_snap("snap2")
        eq(["snap1", "snap2"], map(lambda snap: snap["name"], self.image.list_snaps()))
        self.image.remove_snap("snap1")
        self.image.remove_snap("snap2")

    def test_remove_snap(self):
        eq([], list(self.image.list_snaps()))
        self.image.create_snap("snap1")
        eq(["snap1"], map(lambda snap: snap["name"], self.image.list_snaps()))
        self.image.remove_snap("snap1")
        eq([], list(self.image.list_snaps()))

    @require_features([RBD_FEATURE_LAYERING])
    def test_protect_snap(self):
        self.image.create_snap("snap1")
        assert not self.image.is_protected_snap("snap1")
        self.image.protect_snap("snap1")
        assert self.image.is_protected_snap("snap1")
        assert_raises(ImageBusy, self.image.remove_snap, "snap1")
        self.image.unprotect_snap("snap1")
        assert not self.image.is_protected_snap("snap1")
        self.image.remove_snap("snap1")
        assert_raises(ImageNotFound, self.image.unprotect_snap, "snap1")
        assert_raises(ImageNotFound, self.image.is_protected_snap, "snap1")

    def test_remove_with_snap(self):
        self.image.create_snap("snap1")
        assert_raises(ImageHasSnapshots, remove_image)
        self.image.remove_snap("snap1")

    def test_remove_with_watcher(self):
        data = rand_data(256)
        self.image.write(data, 0)
        assert_raises(ImageBusy, remove_image)
        read = self.image.read(0, 256)
        eq(read, data)

    def test_rollback_to_snap(self):
        self.image.write("\0" * 256, 0)
        self.image.create_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, "\0" * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.rollback_to_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, "\0" * 256)
        self.image.remove_snap("snap1")

    def test_rollback_to_snap_sparse(self):
        self.image.create_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, "\0" * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.rollback_to_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, "\0" * 256)
        self.image.remove_snap("snap1")

    def test_rollback_with_resize(self):
        read = self.image.read(0, 256)
        eq(read, "\0" * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        self.image.create_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, data)
        new_size = IMG_SIZE * 2
        self.image.resize(new_size)
        check_stat(self.image.stat(), new_size, IMG_ORDER)
        self.image.write(data, new_size - 256)
        self.image.create_snap("snap2")
        read = self.image.read(new_size - 256, 256)
        eq(read, data)
        self.image.rollback_to_snap("snap1")
        check_stat(self.image.stat(), IMG_SIZE, IMG_ORDER)
        assert_raises(InvalidArgument, self.image.read, new_size - 256, 256)
        self.image.rollback_to_snap("snap2")
        check_stat(self.image.stat(), new_size, IMG_ORDER)
        read = self.image.read(new_size - 256, 256)
        eq(read, data)
        self.image.remove_snap("snap1")
        self.image.remove_snap("snap2")

    def test_set_snap(self):
        self.image.write("\0" * 256, 0)
        self.image.create_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, "\0" * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, "\0" * 256)
        self.image.remove_snap("snap1")

    def test_set_no_snap(self):
        self.image.write("\0" * 256, 0)
        self.image.create_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, "\0" * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, "\0" * 256)
        self.image.set_snap(None)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.remove_snap("snap1")

    def test_set_snap_sparse(self):
        self.image.create_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, "\0" * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, "\0" * 256)
        self.image.remove_snap("snap1")

    def test_many_snaps(self):
        num_snaps = 200
        for i in xrange(num_snaps):
            self.image.create_snap(str(i))
        snaps = sorted(self.image.list_snaps(), key=lambda snap: int(snap["name"]))
        eq(len(snaps), num_snaps)
        for i, snap in enumerate(snaps):
            eq(snap["size"], IMG_SIZE)
            eq(snap["name"], str(i))
        for i in xrange(num_snaps):
            self.image.remove_snap(str(i))

    def test_set_snap_deleted(self):
        self.image.write("\0" * 256, 0)
        self.image.create_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, "\0" * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap("snap1")
        self.image.remove_snap("snap1")
        assert_raises(ImageNotFound, self.image.read, 0, 256)
        self.image.set_snap(None)
        read = self.image.read(0, 256)
        eq(read, data)

    def test_set_snap_recreated(self):
        self.image.write("\0" * 256, 0)
        self.image.create_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, "\0" * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap("snap1")
        self.image.remove_snap("snap1")
        self.image.create_snap("snap1")
        assert_raises(ImageNotFound, self.image.read, 0, 256)
        self.image.set_snap(None)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.remove_snap("snap1")

    def test_lock_unlock(self):
        assert_raises(ImageNotFound, self.image.unlock, "")
        self.image.lock_exclusive("")
        assert_raises(ImageExists, self.image.lock_exclusive, "")
        assert_raises(ImageBusy, self.image.lock_exclusive, "test")
        assert_raises(ImageExists, self.image.lock_shared, "", "")
        assert_raises(ImageBusy, self.image.lock_shared, "foo", "")
        self.image.unlock("")

    def test_list_lockers(self):
        eq([], self.image.list_lockers())
        self.image.lock_exclusive("test")
        lockers = self.image.list_lockers()
        eq(1, len(lockers["lockers"]))
        _, cookie, _ = lockers["lockers"][0]
        eq(cookie, "test")
        eq("", lockers["tag"])
        assert lockers["exclusive"]
        self.image.unlock("test")
        eq([], self.image.list_lockers())

        num_shared = 10
        for i in xrange(num_shared):
            self.image.lock_shared(str(i), "tag")
        lockers = self.image.list_lockers()
        eq("tag", lockers["tag"])
        assert not lockers["exclusive"]
        eq(num_shared, len(lockers["lockers"]))
        cookies = sorted(map(lambda x: x[1], lockers["lockers"]))
        for i in xrange(num_shared):
            eq(str(i), cookies[i])
            self.image.unlock(str(i))
        eq([], self.image.list_lockers())

    def test_diff_iterate(self):
        check_diff(self.image, 0, IMG_SIZE, None, [])
        self.image.write("a" * 256, 0)
        check_diff(self.image, 0, IMG_SIZE, None, [(0, 256, True)])
        self.image.write("b" * 256, 256)
        check_diff(self.image, 0, IMG_SIZE, None, [(0, 512, True)])
        self.image.discard(128, 256)
        check_diff(self.image, 0, IMG_SIZE, None, [(0, 512, True)])

        self.image.create_snap("snap1")
        self.image.discard(0, 1 << IMG_ORDER)
        self.image.create_snap("snap2")
        self.image.set_snap("snap2")
        check_diff(self.image, 0, IMG_SIZE, "snap1", [(0, 512, False)])
        self.image.remove_snap("snap1")
        self.image.remove_snap("snap2")
示例#3
0
class TestImage(object):

    def setUp(self):
        self.rbd = RBD()
        create_image()
        self.image = Image(ioctx, image_name)

    def tearDown(self):
        self.image.close()
        remove_image()

    @require_new_format()
    @blacklist_features([RBD_FEATURE_EXCLUSIVE_LOCK])
    def test_update_features(self):
        features = self.image.features()
        self.image.update_features(RBD_FEATURE_EXCLUSIVE_LOCK, True)
        eq(features | RBD_FEATURE_EXCLUSIVE_LOCK, self.image.features())

    def test_invalidate_cache(self):
        self.image.write('abc', 0)
        eq('abc', self.image.read(0, 3))
        self.image.invalidate_cache()
        eq('abc', self.image.read(0, 3))

    def test_stat(self):
        info = self.image.stat()
        check_stat(info, IMG_SIZE, IMG_ORDER)

    def test_flags(self):
        flags = self.image.flags()
        eq(0, flags)

    def test_write(self):
        data = rand_data(256)
        self.image.write(data, 0)

    def test_write_with_fadvise_flags(self):
        data = rand_data(256)
        self.image.write(data, 0, LIBRADOS_OP_FLAG_FADVISE_DONTNEED)
        self.image.write(data, 0, LIBRADOS_OP_FLAG_FADVISE_NOCACHE)

    def test_read(self):
        data = self.image.read(0, 20)
        eq(data, '\0' * 20)

    def test_read_with_fadvise_flags(self):
        data = self.image.read(0, 20, LIBRADOS_OP_FLAG_FADVISE_DONTNEED)
        eq(data, '\0' * 20)
        data = self.image.read(0, 20, LIBRADOS_OP_FLAG_FADVISE_RANDOM)
        eq(data, '\0' * 20)

    def test_large_write(self):
        data = rand_data(IMG_SIZE)
        self.image.write(data, 0)

    def test_large_read(self):
        data = self.image.read(0, IMG_SIZE)
        eq(data, '\0' * IMG_SIZE)

    def test_write_read(self):
        data = rand_data(256)
        offset = 50
        self.image.write(data, offset)
        read = self.image.read(offset, 256)
        eq(data, read)

    def test_read_bad_offset(self):
        assert_raises(InvalidArgument, self.image.read, IMG_SIZE + 1, IMG_SIZE)

    def test_resize(self):
        new_size = IMG_SIZE * 2
        self.image.resize(new_size)
        info = self.image.stat()
        check_stat(info, new_size, IMG_ORDER)

    def test_size(self):
        eq(IMG_SIZE, self.image.size())
        self.image.create_snap('snap1')
        new_size = IMG_SIZE * 2
        self.image.resize(new_size)
        eq(new_size, self.image.size())
        self.image.create_snap('snap2')
        self.image.set_snap('snap2')
        eq(new_size, self.image.size())
        self.image.set_snap('snap1')
        eq(IMG_SIZE, self.image.size())
        self.image.set_snap(None)
        eq(new_size, self.image.size())
        self.image.remove_snap('snap1')
        self.image.remove_snap('snap2')

    def test_resize_down(self):
        new_size = IMG_SIZE / 2
        data = rand_data(256)
        self.image.write(data, IMG_SIZE / 2);
        self.image.resize(new_size)
        self.image.resize(IMG_SIZE)
        read = self.image.read(IMG_SIZE / 2, 256)
        eq('\0' * 256, read)

    def test_resize_bytes(self):
        new_size = IMG_SIZE / 2 - 5
        data = rand_data(256)
        self.image.write(data, IMG_SIZE / 2 - 10);
        self.image.resize(new_size)
        self.image.resize(IMG_SIZE)
        read = self.image.read(IMG_SIZE / 2 - 10, 5)
        eq(data[:5], read)
        read = self.image.read(IMG_SIZE / 2 - 5, 251)
        eq('\0' * 251, read)

    def test_copy(self):
        global ioctx
        data = rand_data(256)
        self.image.write(data, 256)
        image_name = get_temp_image_name()
        self.image.copy(ioctx, image_name)
        assert_raises(ImageExists, self.image.copy, ioctx, image_name)
        copy = Image(ioctx, image_name)
        copy_data = copy.read(256, 256)
        copy.close()
        self.rbd.remove(ioctx, image_name)
        eq(data, copy_data)

    def test_create_snap(self):
        global ioctx
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        at_snapshot = Image(ioctx, image_name, 'snap1')
        snap_data = at_snapshot.read(0, 256)
        at_snapshot.close()
        eq(snap_data, '\0' * 256)
        self.image.remove_snap('snap1')

    def test_list_snaps(self):
        eq([], list(self.image.list_snaps()))
        self.image.create_snap('snap1')
        eq(['snap1'], map(lambda snap: snap['name'], self.image.list_snaps()))
        self.image.create_snap('snap2')
        eq(['snap1', 'snap2'], map(lambda snap: snap['name'], self.image.list_snaps()))
        self.image.remove_snap('snap1')
        self.image.remove_snap('snap2')

    def test_remove_snap(self):
        eq([], list(self.image.list_snaps()))
        self.image.create_snap('snap1')
        eq(['snap1'], map(lambda snap: snap['name'], self.image.list_snaps()))
        self.image.remove_snap('snap1')
        eq([], list(self.image.list_snaps()))

    def test_rename_snap(self):
        eq([], list(self.image.list_snaps()))
        self.image.create_snap('snap1')
        eq(['snap1'], map(lambda snap: snap['name'], self.image.list_snaps()))
        self.image.rename_snap("snap1", "snap1-rename")
        eq(['snap1-rename'], map(lambda snap: snap['name'], self.image.list_snaps()))
        self.image.remove_snap('snap1-rename')
        eq([], list(self.image.list_snaps()))

    @require_features([RBD_FEATURE_LAYERING])
    def test_protect_snap(self):
        self.image.create_snap('snap1')
        assert(not self.image.is_protected_snap('snap1'))
        self.image.protect_snap('snap1')
        assert(self.image.is_protected_snap('snap1'))
        assert_raises(ImageBusy, self.image.remove_snap, 'snap1')
        self.image.unprotect_snap('snap1')
        assert(not self.image.is_protected_snap('snap1'))
        self.image.remove_snap('snap1')
        assert_raises(ImageNotFound, self.image.unprotect_snap, 'snap1')
        assert_raises(ImageNotFound, self.image.is_protected_snap, 'snap1')

    @require_features([RBD_FEATURE_EXCLUSIVE_LOCK])
    def test_remove_with_exclusive_lock(self):
        assert_raises(ImageBusy, remove_image)

    @blacklist_features([RBD_FEATURE_EXCLUSIVE_LOCK])
    def test_remove_with_snap(self):
        self.image.create_snap('snap1')
        assert_raises(ImageHasSnapshots, remove_image)
        self.image.remove_snap('snap1')

    @blacklist_features([RBD_FEATURE_EXCLUSIVE_LOCK])
    def test_remove_with_watcher(self):
        data = rand_data(256)
        self.image.write(data, 0)
        assert_raises(ImageBusy, remove_image)
        read = self.image.read(0, 256)
        eq(read, data)

    def test_rollback_to_snap(self):
        self.image.write('\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.rollback_to_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        self.image.remove_snap('snap1')

    def test_rollback_to_snap_sparse(self):
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.rollback_to_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        self.image.remove_snap('snap1')

    def test_rollback_with_resize(self):
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, data)
        new_size = IMG_SIZE * 2
        self.image.resize(new_size)
        check_stat(self.image.stat(), new_size, IMG_ORDER)
        self.image.write(data, new_size - 256)
        self.image.create_snap('snap2')
        read = self.image.read(new_size - 256, 256)
        eq(read, data)
        self.image.rollback_to_snap('snap1')
        check_stat(self.image.stat(), IMG_SIZE, IMG_ORDER)
        assert_raises(InvalidArgument, self.image.read, new_size - 256, 256)
        self.image.rollback_to_snap('snap2')
        check_stat(self.image.stat(), new_size, IMG_ORDER)
        read = self.image.read(new_size - 256, 256)
        eq(read, data)
        self.image.remove_snap('snap1')
        self.image.remove_snap('snap2')

    def test_set_snap(self):
        self.image.write('\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        self.image.remove_snap('snap1')

    def test_set_no_snap(self):
        self.image.write('\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        self.image.set_snap(None)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.remove_snap('snap1')

    def test_set_snap_sparse(self):
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        self.image.remove_snap('snap1')

    def test_many_snaps(self):
        num_snaps = 200
        for i in xrange(num_snaps):
            self.image.create_snap(str(i))
        snaps = sorted(self.image.list_snaps(),
                       key=lambda snap: int(snap['name']))
        eq(len(snaps), num_snaps)
        for i, snap in enumerate(snaps):
            eq(snap['size'], IMG_SIZE)
            eq(snap['name'], str(i))
        for i in xrange(num_snaps):
            self.image.remove_snap(str(i))

    def test_set_snap_deleted(self):
        self.image.write('\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        self.image.remove_snap('snap1')
        assert_raises(ImageNotFound, self.image.read, 0, 256)
        self.image.set_snap(None)
        read = self.image.read(0, 256)
        eq(read, data)

    def test_set_snap_recreated(self):
        self.image.write('\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        self.image.remove_snap('snap1')
        self.image.create_snap('snap1')
        assert_raises(ImageNotFound, self.image.read, 0, 256)
        self.image.set_snap(None)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.remove_snap('snap1')

    def test_lock_unlock(self):
        assert_raises(ImageNotFound, self.image.unlock, '')
        self.image.lock_exclusive('')
        assert_raises(ImageExists, self.image.lock_exclusive, '')
        assert_raises(ImageBusy, self.image.lock_exclusive, 'test')
        assert_raises(ImageExists, self.image.lock_shared, '', '')
        assert_raises(ImageBusy, self.image.lock_shared, 'foo', '')
        self.image.unlock('')

    def test_list_lockers(self):
        eq([], self.image.list_lockers())
        self.image.lock_exclusive('test')
        lockers = self.image.list_lockers()
        eq(1, len(lockers['lockers']))
        _, cookie, _ = lockers['lockers'][0]
        eq(cookie, 'test')
        eq('', lockers['tag'])
        assert lockers['exclusive']
        self.image.unlock('test')
        eq([], self.image.list_lockers())

        num_shared = 10
        for i in xrange(num_shared):
            self.image.lock_shared(str(i), 'tag')
        lockers = self.image.list_lockers()
        eq('tag', lockers['tag'])
        assert not lockers['exclusive']
        eq(num_shared, len(lockers['lockers']))
        cookies = sorted(map(lambda x: x[1], lockers['lockers']))
        for i in xrange(num_shared):
            eq(str(i), cookies[i])
            self.image.unlock(str(i))
        eq([], self.image.list_lockers())

    def test_diff_iterate(self):
        check_diff(self.image, 0, IMG_SIZE, None, [])
        self.image.write('a' * 256, 0)
        check_diff(self.image, 0, IMG_SIZE, None, [(0, 256, True)])
        self.image.write('b' * 256, 256)
        check_diff(self.image, 0, IMG_SIZE, None, [(0, 512, True)])
        self.image.discard(128, 256)
        check_diff(self.image, 0, IMG_SIZE, None, [(0, 512, True)])

        self.image.create_snap('snap1')
        self.image.discard(0, 1 << IMG_ORDER)
        self.image.create_snap('snap2')
        self.image.set_snap('snap2')
        check_diff(self.image, 0, IMG_SIZE, 'snap1', [(0, 512, False)])
        self.image.remove_snap('snap1')
        self.image.remove_snap('snap2')
示例#4
0
文件: test_rbd.py 项目: HubPeter/ceph
class TestImage(object):

    def setUp(self):
        self.rbd = RBD()
        create_image()
        self.image = Image(ioctx, IMG_NAME)

    def tearDown(self):
        self.image.close()
        remove_image()

    def test_stat(self):
        info = self.image.stat()
        check_stat(info, IMG_SIZE, IMG_ORDER)

    def test_write(self):
        data = rand_data(256)
        self.image.write(data, 0)

    def test_read(self):
        data = self.image.read(0, 20)
        eq(data, '\0' * 20)

    def test_large_write(self):
        data = rand_data(IMG_SIZE)
        self.image.write(data, 0)

    def test_large_read(self):
        data = self.image.read(0, IMG_SIZE)
        eq(data, '\0' * IMG_SIZE)

    def test_write_read(self):
        data = rand_data(256)
        offset = 50
        self.image.write(data, offset)
        read = self.image.read(offset, 256)
        eq(data, read)

    def test_read_bad_offset(self):
        assert_raises(InvalidArgument, self.image.read, IMG_SIZE + 1, IMG_SIZE)

    def test_resize(self):
        new_size = IMG_SIZE * 2
        self.image.resize(new_size)
        info = self.image.stat()
        check_stat(info, new_size, IMG_ORDER)

    def test_size(self):
        eq(IMG_SIZE, self.image.size())
        self.image.create_snap('snap1')
        new_size = IMG_SIZE * 2
        self.image.resize(new_size)
        eq(new_size, self.image.size())
        self.image.create_snap('snap2')
        self.image.set_snap('snap2')
        eq(new_size, self.image.size())
        self.image.set_snap('snap1')
        eq(IMG_SIZE, self.image.size())
        self.image.set_snap(None)
        eq(new_size, self.image.size())
        self.image.remove_snap('snap1')
        self.image.remove_snap('snap2')

    def test_resize_down(self):
        new_size = IMG_SIZE / 2
        data = rand_data(256)
        self.image.write(data, IMG_SIZE / 2);
        self.image.resize(new_size)
        self.image.resize(IMG_SIZE)
        read = self.image.read(IMG_SIZE / 2, 256)
        eq('\0' * 256, read)

    def test_resize_bytes(self):
        new_size = IMG_SIZE / 2 - 5
        data = rand_data(256)
        self.image.write(data, IMG_SIZE / 2 - 10);
        self.image.resize(new_size)
        self.image.resize(IMG_SIZE)
        read = self.image.read(IMG_SIZE / 2 - 10, 5)
        eq(data[:5], read)
        read = self.image.read(IMG_SIZE / 2 - 5, 251)
        eq('\0' * 251, read)

    def test_copy(self):
        global ioctx
        data = rand_data(256)
        self.image.write(data, 256)
        self.image.copy(ioctx, IMG_NAME + '2')
        assert_raises(ImageExists, self.image.copy, ioctx, IMG_NAME + '2')
        copy = Image(ioctx, IMG_NAME + '2')
        copy_data = copy.read(256, 256)
        copy.close()
        self.rbd.remove(ioctx, IMG_NAME + '2')
        eq(data, copy_data)

    def test_create_snap(self):
        global ioctx
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        at_snapshot = Image(ioctx, IMG_NAME, 'snap1')
        snap_data = at_snapshot.read(0, 256)
        at_snapshot.close()
        eq(snap_data, '\0' * 256)
        self.image.remove_snap('snap1')

    def test_list_snaps(self):
        eq([], list(self.image.list_snaps()))
        self.image.create_snap('snap1')
        eq(['snap1'], map(lambda snap: snap['name'], self.image.list_snaps()))
        self.image.create_snap('snap2')
        eq(['snap1', 'snap2'], map(lambda snap: snap['name'], self.image.list_snaps()))
        self.image.remove_snap('snap1')
        self.image.remove_snap('snap2')

    def test_remove_snap(self):
        eq([], list(self.image.list_snaps()))
        self.image.create_snap('snap1')
        eq(['snap1'], map(lambda snap: snap['name'], self.image.list_snaps()))
        self.image.remove_snap('snap1')
        eq([], list(self.image.list_snaps()))

    @require_features([RBD_FEATURE_LAYERING])
    def test_protect_snap(self):
        self.image.create_snap('snap1')
        assert(not self.image.is_protected_snap('snap1'))
        self.image.protect_snap('snap1')
        assert(self.image.is_protected_snap('snap1'))
        assert_raises(ImageBusy, self.image.remove_snap, 'snap1')
        self.image.unprotect_snap('snap1')
        assert(not self.image.is_protected_snap('snap1'))
        self.image.remove_snap('snap1')
        assert_raises(ImageNotFound, self.image.unprotect_snap, 'snap1')
        assert_raises(ImageNotFound, self.image.is_protected_snap, 'snap1')

    def test_remove_with_snap(self):
        self.image.create_snap('snap1')
        assert_raises(ImageHasSnapshots, remove_image)
        self.image.remove_snap('snap1')

    def test_remove_with_watcher(self):
        assert_raises(ImageBusy, remove_image)

    def test_rollback_to_snap(self):
        self.image.write('\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.rollback_to_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        self.image.remove_snap('snap1')

    def test_rollback_to_snap_sparse(self):
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.rollback_to_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        self.image.remove_snap('snap1')

    def test_rollback_with_resize(self):
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, data)
        new_size = IMG_SIZE * 2
        self.image.resize(new_size)
        check_stat(self.image.stat(), new_size, IMG_ORDER)
        self.image.write(data, new_size - 256)
        self.image.create_snap('snap2')
        read = self.image.read(new_size - 256, 256)
        eq(read, data)
        self.image.rollback_to_snap('snap1')
        check_stat(self.image.stat(), IMG_SIZE, IMG_ORDER)
        assert_raises(InvalidArgument, self.image.read, new_size - 256, 256)
        self.image.rollback_to_snap('snap2')
        check_stat(self.image.stat(), new_size, IMG_ORDER)
        read = self.image.read(new_size - 256, 256)
        eq(read, data)
        self.image.remove_snap('snap1')
        self.image.remove_snap('snap2')

    def test_set_snap(self):
        self.image.write('\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        self.image.remove_snap('snap1')

    def test_set_no_snap(self):
        self.image.write('\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        self.image.set_snap(None)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.remove_snap('snap1')

    def test_set_snap_sparse(self):
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        self.image.remove_snap('snap1')

    def test_many_snaps(self):
        num_snaps = 200
        for i in xrange(num_snaps):
            self.image.create_snap(str(i))
        snaps = sorted(self.image.list_snaps(),
                       key=lambda snap: int(snap['name']))
        eq(len(snaps), num_snaps)
        for i, snap in enumerate(snaps):
            eq(snap['size'], IMG_SIZE)
            eq(snap['name'], str(i))
        for i in xrange(num_snaps):
            self.image.remove_snap(str(i))

    def test_set_snap_deleted(self):
        self.image.write('\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        self.image.remove_snap('snap1')
        assert_raises(ImageNotFound, self.image.read, 0, 256)
        self.image.set_snap(None)
        read = self.image.read(0, 256)
        eq(read, data)

    def test_set_snap_recreated(self):
        self.image.write('\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        self.image.remove_snap('snap1')
        self.image.create_snap('snap1')
        assert_raises(ImageNotFound, self.image.read, 0, 256)
        self.image.set_snap(None)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.remove_snap('snap1')
        
    def test_lock_unlock(self):
        assert_raises(ImageNotFound, self.image.unlock, '')
        self.image.lock_exclusive('')
        assert_raises(ImageExists, self.image.lock_exclusive, '')
        assert_raises(ImageBusy, self.image.lock_exclusive, 'test')
        assert_raises(ImageExists, self.image.lock_shared, '', '')
        assert_raises(ImageBusy, self.image.lock_shared, 'foo', '')
        self.image.unlock('')

    def test_list_lockers(self):
        eq([], self.image.list_lockers())
        self.image.lock_exclusive('test')
        lockers = self.image.list_lockers()
        eq(1, len(lockers['lockers']))
        _, cookie, _ = lockers['lockers'][0]
        eq(cookie, 'test')
        eq('', lockers['tag'])
        assert lockers['exclusive']
        self.image.unlock('test')
        eq([], self.image.list_lockers())

        num_shared = 10
        for i in xrange(num_shared):
            self.image.lock_shared(str(i), 'tag')
        lockers = self.image.list_lockers()
        eq('tag', lockers['tag'])
        assert not lockers['exclusive']
        eq(num_shared, len(lockers['lockers']))
        cookies = sorted(map(lambda x: x[1], lockers['lockers']))
        for i in xrange(num_shared):
            eq(str(i), cookies[i])
            self.image.unlock(str(i))
        eq([], self.image.list_lockers())
示例#5
0
class TestImage(object):

    def setUp(self):
        self.rbd = RBD()
        create_image()
        self.image = Image(ioctx, image_name)

    def tearDown(self):
        self.image.close()
        remove_image()
        self.image = None

    @require_new_format()
    @blacklist_features([RBD_FEATURE_EXCLUSIVE_LOCK])
    def test_update_features(self):
        features = self.image.features()
        self.image.update_features(RBD_FEATURE_EXCLUSIVE_LOCK, True)
        eq(features | RBD_FEATURE_EXCLUSIVE_LOCK, self.image.features())

    @require_features([RBD_FEATURE_STRIPINGV2])
    def test_create_with_params(self):
        global features
        image_name = get_temp_image_name()
        order = 20
        stripe_unit = 1 << 20
        stripe_count = 10
        self.rbd.create(ioctx, image_name, IMG_SIZE, order,
                        False, features, stripe_unit, stripe_count)
        image = Image(ioctx, image_name)
        info = image.stat()
        check_stat(info, IMG_SIZE, order)
        eq(image.features(), features)
        eq(image.stripe_unit(), stripe_unit)
        eq(image.stripe_count(), stripe_count)
        image.close()
        RBD().remove(ioctx, image_name)

    @require_new_format()
    def test_id(self):
        assert_not_equal(b'', self.image.id())

    def test_block_name_prefix(self):
        assert_not_equal(b'', self.image.block_name_prefix())

    def test_invalidate_cache(self):
        self.image.write(b'abc', 0)
        eq(b'abc', self.image.read(0, 3))
        self.image.invalidate_cache()
        eq(b'abc', self.image.read(0, 3))

    def test_stat(self):
        info = self.image.stat()
        check_stat(info, IMG_SIZE, IMG_ORDER)

    def test_flags(self):
        flags = self.image.flags()
        eq(0, flags)

    def test_image_auto_close(self):
        image = Image(ioctx, image_name)

    def test_write(self):
        data = rand_data(256)
        self.image.write(data, 0)

    def test_write_with_fadvise_flags(self):
        data = rand_data(256)
        self.image.write(data, 0, LIBRADOS_OP_FLAG_FADVISE_DONTNEED)
        self.image.write(data, 0, LIBRADOS_OP_FLAG_FADVISE_NOCACHE)

    def test_read(self):
        data = self.image.read(0, 20)
        eq(data, b'\0' * 20)

    def test_read_with_fadvise_flags(self):
        data = self.image.read(0, 20, LIBRADOS_OP_FLAG_FADVISE_DONTNEED)
        eq(data, b'\0' * 20)
        data = self.image.read(0, 20, LIBRADOS_OP_FLAG_FADVISE_RANDOM)
        eq(data, b'\0' * 20)

    def test_large_write(self):
        data = rand_data(IMG_SIZE)
        self.image.write(data, 0)

    def test_large_read(self):
        data = self.image.read(0, IMG_SIZE)
        eq(data, b'\0' * IMG_SIZE)

    def test_write_read(self):
        data = rand_data(256)
        offset = 50
        self.image.write(data, offset)
        read = self.image.read(offset, 256)
        eq(data, read)

    def test_read_bad_offset(self):
        assert_raises(InvalidArgument, self.image.read, IMG_SIZE + 1, IMG_SIZE)

    def test_resize(self):
        new_size = IMG_SIZE * 2
        self.image.resize(new_size)
        info = self.image.stat()
        check_stat(info, new_size, IMG_ORDER)

    def test_size(self):
        eq(IMG_SIZE, self.image.size())
        self.image.create_snap('snap1')
        new_size = IMG_SIZE * 2
        self.image.resize(new_size)
        eq(new_size, self.image.size())
        self.image.create_snap('snap2')
        self.image.set_snap('snap2')
        eq(new_size, self.image.size())
        self.image.set_snap('snap1')
        eq(IMG_SIZE, self.image.size())
        self.image.set_snap(None)
        eq(new_size, self.image.size())
        self.image.remove_snap('snap1')
        self.image.remove_snap('snap2')

    def test_resize_down(self):
        new_size = IMG_SIZE // 2
        data = rand_data(256)
        self.image.write(data, IMG_SIZE // 2);
        self.image.resize(new_size)
        self.image.resize(IMG_SIZE)
        read = self.image.read(IMG_SIZE // 2, 256)
        eq(b'\0' * 256, read)

    def test_resize_bytes(self):
        new_size = IMG_SIZE // 2 - 5
        data = rand_data(256)
        self.image.write(data, IMG_SIZE // 2 - 10);
        self.image.resize(new_size)
        self.image.resize(IMG_SIZE)
        read = self.image.read(IMG_SIZE // 2 - 10, 5)
        eq(data[:5], read)
        read = self.image.read(IMG_SIZE // 2 - 5, 251)
        eq(b'\0' * 251, read)

    def _test_copy(self, features=None, order=None, stripe_unit=None,
                   stripe_count=None):
        global ioctx
        data = rand_data(256)
        self.image.write(data, 256)
        image_name = get_temp_image_name()
        if features is None:
            self.image.copy(ioctx, image_name)
        elif order is None:
            self.image.copy(ioctx, image_name, features)
        elif stripe_unit is None:
            self.image.copy(ioctx, image_name, features, order)
        elif stripe_count is None:
            self.image.copy(ioctx, image_name, features, order, stripe_unit)
        else:
            self.image.copy(ioctx, image_name, features, order, stripe_unit,
                            stripe_count)
        assert_raises(ImageExists, self.image.copy, ioctx, image_name)
        copy = Image(ioctx, image_name)
        copy_data = copy.read(256, 256)
        copy.close()
        self.rbd.remove(ioctx, image_name)
        eq(data, copy_data)

    def test_copy(self):
        self._test_copy()

    def test_copy2(self):
        self._test_copy(self.image.features(), self.image.stat()['order'])

    @require_features([RBD_FEATURE_STRIPINGV2])
    def test_copy3(self):
        global features
        self._test_copy(features, self.image.stat()['order'],
                        self.image.stripe_unit(), self.image.stripe_count())

    def test_create_snap(self):
        global ioctx
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        at_snapshot = Image(ioctx, image_name, 'snap1')
        snap_data = at_snapshot.read(0, 256)
        at_snapshot.close()
        eq(snap_data, b'\0' * 256)
        self.image.remove_snap('snap1')

    def test_list_snaps(self):
        eq([], list(self.image.list_snaps()))
        self.image.create_snap('snap1')
        eq(['snap1'], [snap['name'] for snap in self.image.list_snaps()])
        self.image.create_snap('snap2')
        eq(['snap1', 'snap2'], [snap['name'] for snap in self.image.list_snaps()])
        self.image.remove_snap('snap1')
        self.image.remove_snap('snap2')

    def test_list_snaps_iterator_auto_close(self):
        self.image.create_snap('snap1')
        self.image.list_snaps()
        self.image.remove_snap('snap1')

    def test_remove_snap(self):
        eq([], list(self.image.list_snaps()))
        self.image.create_snap('snap1')
        eq(['snap1'], [snap['name'] for snap in self.image.list_snaps()])
        self.image.remove_snap('snap1')
        eq([], list(self.image.list_snaps()))

    def test_rename_snap(self):
        eq([], list(self.image.list_snaps()))
        self.image.create_snap('snap1')
        eq(['snap1'], [snap['name'] for snap in self.image.list_snaps()])
        self.image.rename_snap("snap1", "snap1-rename")
        eq(['snap1-rename'], [snap['name'] for snap in self.image.list_snaps()])
        self.image.remove_snap('snap1-rename')
        eq([], list(self.image.list_snaps()))

    @require_features([RBD_FEATURE_LAYERING])
    def test_protect_snap(self):
        self.image.create_snap('snap1')
        assert(not self.image.is_protected_snap('snap1'))
        self.image.protect_snap('snap1')
        assert(self.image.is_protected_snap('snap1'))
        assert_raises(ImageBusy, self.image.remove_snap, 'snap1')
        self.image.unprotect_snap('snap1')
        assert(not self.image.is_protected_snap('snap1'))
        self.image.remove_snap('snap1')
        assert_raises(ImageNotFound, self.image.unprotect_snap, 'snap1')
        assert_raises(ImageNotFound, self.image.is_protected_snap, 'snap1')

    def test_limit_snaps(self):
        self.image.set_snap_limit(2)
        eq(2, self.image.get_snap_limit())
        self.image.create_snap('snap1')
        self.image.create_snap('snap2')
        assert_raises(DiskQuotaExceeded, self.image.create_snap, 'snap3')
        self.image.remove_snap_limit()
        self.image.create_snap('snap3')

        self.image.remove_snap('snap1')
        self.image.remove_snap('snap2')
        self.image.remove_snap('snap3')

    @require_features([RBD_FEATURE_EXCLUSIVE_LOCK])
    def test_remove_with_exclusive_lock(self):
        assert_raises(ImageBusy, remove_image)

    @blacklist_features([RBD_FEATURE_EXCLUSIVE_LOCK])
    def test_remove_with_snap(self):
        self.image.create_snap('snap1')
        assert_raises(ImageHasSnapshots, remove_image)
        self.image.remove_snap('snap1')

    @blacklist_features([RBD_FEATURE_EXCLUSIVE_LOCK])
    def test_remove_with_watcher(self):
        data = rand_data(256)
        self.image.write(data, 0)
        assert_raises(ImageBusy, remove_image)
        read = self.image.read(0, 256)
        eq(read, data)

    def test_rollback_to_snap(self):
        self.image.write(b'\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.rollback_to_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        self.image.remove_snap('snap1')

    def test_rollback_to_snap_sparse(self):
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.rollback_to_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        self.image.remove_snap('snap1')

    def test_rollback_with_resize(self):
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, data)
        new_size = IMG_SIZE * 2
        self.image.resize(new_size)
        check_stat(self.image.stat(), new_size, IMG_ORDER)
        self.image.write(data, new_size - 256)
        self.image.create_snap('snap2')
        read = self.image.read(new_size - 256, 256)
        eq(read, data)
        self.image.rollback_to_snap('snap1')
        check_stat(self.image.stat(), IMG_SIZE, IMG_ORDER)
        assert_raises(InvalidArgument, self.image.read, new_size - 256, 256)
        self.image.rollback_to_snap('snap2')
        check_stat(self.image.stat(), new_size, IMG_ORDER)
        read = self.image.read(new_size - 256, 256)
        eq(read, data)
        self.image.remove_snap('snap1')
        self.image.remove_snap('snap2')

    def test_set_snap(self):
        self.image.write(b'\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        self.image.remove_snap('snap1')

    def test_set_no_snap(self):
        self.image.write(b'\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        self.image.set_snap(None)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.remove_snap('snap1')

    def test_set_snap_sparse(self):
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        self.image.remove_snap('snap1')

    def test_many_snaps(self):
        num_snaps = 200
        for i in range(num_snaps):
            self.image.create_snap(str(i))
        snaps = sorted(self.image.list_snaps(),
                       key=lambda snap: int(snap['name']))
        eq(len(snaps), num_snaps)
        for i, snap in enumerate(snaps):
            eq(snap['size'], IMG_SIZE)
            eq(snap['name'], str(i))
        for i in range(num_snaps):
            self.image.remove_snap(str(i))

    def test_set_snap_deleted(self):
        self.image.write(b'\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        self.image.remove_snap('snap1')
        assert_raises(ImageNotFound, self.image.read, 0, 256)
        self.image.set_snap(None)
        read = self.image.read(0, 256)
        eq(read, data)

    def test_set_snap_recreated(self):
        self.image.write(b'\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, b'\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        self.image.remove_snap('snap1')
        self.image.create_snap('snap1')
        assert_raises(ImageNotFound, self.image.read, 0, 256)
        self.image.set_snap(None)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.remove_snap('snap1')

    def test_lock_unlock(self):
        assert_raises(ImageNotFound, self.image.unlock, '')
        self.image.lock_exclusive('')
        assert_raises(ImageExists, self.image.lock_exclusive, '')
        assert_raises(ImageBusy, self.image.lock_exclusive, 'test')
        assert_raises(ImageExists, self.image.lock_shared, '', '')
        assert_raises(ImageBusy, self.image.lock_shared, 'foo', '')
        self.image.unlock('')

    def test_list_lockers(self):
        eq([], self.image.list_lockers())
        self.image.lock_exclusive('test')
        lockers = self.image.list_lockers()
        eq(1, len(lockers['lockers']))
        _, cookie, _ = lockers['lockers'][0]
        eq(cookie, 'test')
        eq('', lockers['tag'])
        assert lockers['exclusive']
        self.image.unlock('test')
        eq([], self.image.list_lockers())

        num_shared = 10
        for i in range(num_shared):
            self.image.lock_shared(str(i), 'tag')
        lockers = self.image.list_lockers()
        eq('tag', lockers['tag'])
        assert not lockers['exclusive']
        eq(num_shared, len(lockers['lockers']))
        cookies = sorted(map(lambda x: x[1], lockers['lockers']))
        for i in range(num_shared):
            eq(str(i), cookies[i])
            self.image.unlock(str(i))
        eq([], self.image.list_lockers())

    def test_diff_iterate(self):
        check_diff(self.image, 0, IMG_SIZE, None, [])
        self.image.write(b'a' * 256, 0)
        check_diff(self.image, 0, IMG_SIZE, None, [(0, 256, True)])
        self.image.write(b'b' * 256, 256)
        check_diff(self.image, 0, IMG_SIZE, None, [(0, 512, True)])
        self.image.discard(128, 256)
        check_diff(self.image, 0, IMG_SIZE, None, [(0, 512, True)])

        self.image.create_snap('snap1')
        self.image.discard(0, 1 << IMG_ORDER)
        self.image.create_snap('snap2')
        self.image.set_snap('snap2')
        check_diff(self.image, 0, IMG_SIZE, 'snap1', [(0, 512, False)])
        self.image.remove_snap('snap1')
        self.image.remove_snap('snap2')

    def test_aio_read(self):
        # this is a list so that the local cb() can modify it
        retval = [None]
        def cb(_, buf):
            retval[0] = buf

        # test1: success case
        comp = self.image.aio_read(0, 20, cb)
        comp.wait_for_complete_and_cb()
        eq(retval[0], b'\0' * 20)
        eq(comp.get_return_value(), 20)
        eq(sys.getrefcount(comp), 2)

        # test2: error case
        retval[0] = 1
        comp = self.image.aio_read(IMG_SIZE, 20, cb)
        comp.wait_for_complete_and_cb()
        eq(None, retval[0])
        assert(comp.get_return_value() < 0)
        eq(sys.getrefcount(comp), 2)

    def test_aio_write(self):
        retval = [None]
        def cb(comp):
            retval[0] = comp.get_return_value()

        data = rand_data(256)
        comp = self.image.aio_write(data, 256, cb)
        comp.wait_for_complete_and_cb()
        eq(retval[0], 0)
        eq(comp.get_return_value(), 0)
        eq(sys.getrefcount(comp), 2)
        eq(self.image.read(256, 256), data)

    def test_aio_discard(self):
        retval = [None]
        def cb(comp):
            retval[0] = comp.get_return_value()

        data = rand_data(256)
        self.image.write(data, 0)
        comp = self.image.aio_discard(0, 256, cb)
        comp.wait_for_complete_and_cb()
        eq(retval[0], 0)
        eq(comp.get_return_value(), 0)
        eq(sys.getrefcount(comp), 2)
        eq(self.image.read(256, 256), b'\0' * 256)

    def test_aio_flush(self):
        retval = [None]
        def cb(comp):
            retval[0] = comp.get_return_value()

        comp = self.image.aio_flush(cb)
        comp.wait_for_complete_and_cb()
        eq(retval[0], 0)
        eq(sys.getrefcount(comp), 2)
示例#6
0
文件: test_rbd.py 项目: carmark/ceph
class TestImage(object):
    def setUp(self):
        self.rbd = RBD()
        create_image()
        self.image = Image(ioctx, image_name)

    def tearDown(self):
        self.image.close()
        remove_image()

    @require_new_format()
    @blacklist_features([RBD_FEATURE_EXCLUSIVE_LOCK])
    def test_update_features(self):
        features = self.image.features()
        self.image.update_features(RBD_FEATURE_EXCLUSIVE_LOCK, True)
        eq(features | RBD_FEATURE_EXCLUSIVE_LOCK, self.image.features())

    @require_features([RBD_FEATURE_STRIPINGV2])
    def test_create_with_params(self):
        global features
        image_name = get_temp_image_name()
        order = 20
        stripe_unit = 1 << 20
        stripe_count = 10
        self.rbd.create(ioctx, image_name, IMG_SIZE, order, False, features, stripe_unit, stripe_count)
        image = Image(ioctx, image_name)
        info = image.stat()
        check_stat(info, IMG_SIZE, order)
        eq(image.features(), features)
        eq(image.stripe_unit(), stripe_unit)
        eq(image.stripe_count(), stripe_count)
        image.close()
        RBD().remove(ioctx, image_name)

    def test_invalidate_cache(self):
        self.image.write(b"abc", 0)
        eq(b"abc", self.image.read(0, 3))
        self.image.invalidate_cache()
        eq(b"abc", self.image.read(0, 3))

    def test_stat(self):
        info = self.image.stat()
        check_stat(info, IMG_SIZE, IMG_ORDER)

    def test_flags(self):
        flags = self.image.flags()
        eq(0, flags)

    def test_image_auto_close(self):
        image = Image(ioctx, image_name)

    def test_write(self):
        data = rand_data(256)
        self.image.write(data, 0)

    def test_write_with_fadvise_flags(self):
        data = rand_data(256)
        self.image.write(data, 0, LIBRADOS_OP_FLAG_FADVISE_DONTNEED)
        self.image.write(data, 0, LIBRADOS_OP_FLAG_FADVISE_NOCACHE)

    def test_read(self):
        data = self.image.read(0, 20)
        eq(data, b"\0" * 20)

    def test_read_with_fadvise_flags(self):
        data = self.image.read(0, 20, LIBRADOS_OP_FLAG_FADVISE_DONTNEED)
        eq(data, b"\0" * 20)
        data = self.image.read(0, 20, LIBRADOS_OP_FLAG_FADVISE_RANDOM)
        eq(data, b"\0" * 20)

    def test_large_write(self):
        data = rand_data(IMG_SIZE)
        self.image.write(data, 0)

    def test_large_read(self):
        data = self.image.read(0, IMG_SIZE)
        eq(data, b"\0" * IMG_SIZE)

    def test_write_read(self):
        data = rand_data(256)
        offset = 50
        self.image.write(data, offset)
        read = self.image.read(offset, 256)
        eq(data, read)

    def test_read_bad_offset(self):
        assert_raises(InvalidArgument, self.image.read, IMG_SIZE + 1, IMG_SIZE)

    def test_resize(self):
        new_size = IMG_SIZE * 2
        self.image.resize(new_size)
        info = self.image.stat()
        check_stat(info, new_size, IMG_ORDER)

    def test_size(self):
        eq(IMG_SIZE, self.image.size())
        self.image.create_snap("snap1")
        new_size = IMG_SIZE * 2
        self.image.resize(new_size)
        eq(new_size, self.image.size())
        self.image.create_snap("snap2")
        self.image.set_snap("snap2")
        eq(new_size, self.image.size())
        self.image.set_snap("snap1")
        eq(IMG_SIZE, self.image.size())
        self.image.set_snap(None)
        eq(new_size, self.image.size())
        self.image.remove_snap("snap1")
        self.image.remove_snap("snap2")

    def test_resize_down(self):
        new_size = IMG_SIZE // 2
        data = rand_data(256)
        self.image.write(data, IMG_SIZE // 2)
        self.image.resize(new_size)
        self.image.resize(IMG_SIZE)
        read = self.image.read(IMG_SIZE // 2, 256)
        eq(b"\0" * 256, read)

    def test_resize_bytes(self):
        new_size = IMG_SIZE // 2 - 5
        data = rand_data(256)
        self.image.write(data, IMG_SIZE // 2 - 10)
        self.image.resize(new_size)
        self.image.resize(IMG_SIZE)
        read = self.image.read(IMG_SIZE // 2 - 10, 5)
        eq(data[:5], read)
        read = self.image.read(IMG_SIZE // 2 - 5, 251)
        eq(b"\0" * 251, read)

    def _test_copy(self, features=None, order=None, stripe_unit=None, stripe_count=None):
        global ioctx
        data = rand_data(256)
        self.image.write(data, 256)
        image_name = get_temp_image_name()
        if features is None:
            self.image.copy(ioctx, image_name)
        elif order is None:
            self.image.copy(ioctx, image_name, features)
        elif stripe_unit is None:
            self.image.copy(ioctx, image_name, features, order)
        elif stripe_count is None:
            self.image.copy(ioctx, image_name, features, order, stripe_unit)
        else:
            self.image.copy(ioctx, image_name, features, order, stripe_unit, stripe_count)
        assert_raises(ImageExists, self.image.copy, ioctx, image_name)
        copy = Image(ioctx, image_name)
        copy_data = copy.read(256, 256)
        copy.close()
        self.rbd.remove(ioctx, image_name)
        eq(data, copy_data)

    def test_copy(self):
        self._test_copy()

    def test_copy2(self):
        self._test_copy(self.image.features(), self.image.stat()["order"])

    @require_features([RBD_FEATURE_STRIPINGV2])
    def test_copy3(self):
        global features
        self._test_copy(features, self.image.stat()["order"], self.image.stripe_unit(), self.image.stripe_count())

    def test_create_snap(self):
        global ioctx
        self.image.create_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, b"\0" * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        at_snapshot = Image(ioctx, image_name, "snap1")
        snap_data = at_snapshot.read(0, 256)
        at_snapshot.close()
        eq(snap_data, b"\0" * 256)
        self.image.remove_snap("snap1")

    def test_list_snaps(self):
        eq([], list(self.image.list_snaps()))
        self.image.create_snap("snap1")
        eq(["snap1"], [snap["name"] for snap in self.image.list_snaps()])
        self.image.create_snap("snap2")
        eq(["snap1", "snap2"], [snap["name"] for snap in self.image.list_snaps()])
        self.image.remove_snap("snap1")
        self.image.remove_snap("snap2")

    def test_list_snaps_iterator_auto_close(self):
        self.image.create_snap("snap1")
        self.image.list_snaps()
        self.image.remove_snap("snap1")

    def test_remove_snap(self):
        eq([], list(self.image.list_snaps()))
        self.image.create_snap("snap1")
        eq(["snap1"], [snap["name"] for snap in self.image.list_snaps()])
        self.image.remove_snap("snap1")
        eq([], list(self.image.list_snaps()))

    def test_rename_snap(self):
        eq([], list(self.image.list_snaps()))
        self.image.create_snap("snap1")
        eq(["snap1"], [snap["name"] for snap in self.image.list_snaps()])
        self.image.rename_snap("snap1", "snap1-rename")
        eq(["snap1-rename"], [snap["name"] for snap in self.image.list_snaps()])
        self.image.remove_snap("snap1-rename")
        eq([], list(self.image.list_snaps()))

    @require_features([RBD_FEATURE_LAYERING])
    def test_protect_snap(self):
        self.image.create_snap("snap1")
        assert not self.image.is_protected_snap("snap1")
        self.image.protect_snap("snap1")
        assert self.image.is_protected_snap("snap1")
        assert_raises(ImageBusy, self.image.remove_snap, "snap1")
        self.image.unprotect_snap("snap1")
        assert not self.image.is_protected_snap("snap1")
        self.image.remove_snap("snap1")
        assert_raises(ImageNotFound, self.image.unprotect_snap, "snap1")
        assert_raises(ImageNotFound, self.image.is_protected_snap, "snap1")

    @require_features([RBD_FEATURE_EXCLUSIVE_LOCK])
    def test_remove_with_exclusive_lock(self):
        assert_raises(ImageBusy, remove_image)

    @blacklist_features([RBD_FEATURE_EXCLUSIVE_LOCK])
    def test_remove_with_snap(self):
        self.image.create_snap("snap1")
        assert_raises(ImageHasSnapshots, remove_image)
        self.image.remove_snap("snap1")

    @blacklist_features([RBD_FEATURE_EXCLUSIVE_LOCK])
    def test_remove_with_watcher(self):
        data = rand_data(256)
        self.image.write(data, 0)
        assert_raises(ImageBusy, remove_image)
        read = self.image.read(0, 256)
        eq(read, data)

    def test_rollback_to_snap(self):
        self.image.write(b"\0" * 256, 0)
        self.image.create_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, b"\0" * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.rollback_to_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, b"\0" * 256)
        self.image.remove_snap("snap1")

    def test_rollback_to_snap_sparse(self):
        self.image.create_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, b"\0" * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.rollback_to_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, b"\0" * 256)
        self.image.remove_snap("snap1")

    def test_rollback_with_resize(self):
        read = self.image.read(0, 256)
        eq(read, b"\0" * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        self.image.create_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, data)
        new_size = IMG_SIZE * 2
        self.image.resize(new_size)
        check_stat(self.image.stat(), new_size, IMG_ORDER)
        self.image.write(data, new_size - 256)
        self.image.create_snap("snap2")
        read = self.image.read(new_size - 256, 256)
        eq(read, data)
        self.image.rollback_to_snap("snap1")
        check_stat(self.image.stat(), IMG_SIZE, IMG_ORDER)
        assert_raises(InvalidArgument, self.image.read, new_size - 256, 256)
        self.image.rollback_to_snap("snap2")
        check_stat(self.image.stat(), new_size, IMG_ORDER)
        read = self.image.read(new_size - 256, 256)
        eq(read, data)
        self.image.remove_snap("snap1")
        self.image.remove_snap("snap2")

    def test_set_snap(self):
        self.image.write(b"\0" * 256, 0)
        self.image.create_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, b"\0" * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, b"\0" * 256)
        self.image.remove_snap("snap1")

    def test_set_no_snap(self):
        self.image.write(b"\0" * 256, 0)
        self.image.create_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, b"\0" * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, b"\0" * 256)
        self.image.set_snap(None)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.remove_snap("snap1")

    def test_set_snap_sparse(self):
        self.image.create_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, b"\0" * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, b"\0" * 256)
        self.image.remove_snap("snap1")

    def test_many_snaps(self):
        num_snaps = 200
        for i in range(num_snaps):
            self.image.create_snap(str(i))
        snaps = sorted(self.image.list_snaps(), key=lambda snap: int(snap["name"]))
        eq(len(snaps), num_snaps)
        for i, snap in enumerate(snaps):
            eq(snap["size"], IMG_SIZE)
            eq(snap["name"], str(i))
        for i in range(num_snaps):
            self.image.remove_snap(str(i))

    def test_set_snap_deleted(self):
        self.image.write(b"\0" * 256, 0)
        self.image.create_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, b"\0" * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap("snap1")
        self.image.remove_snap("snap1")
        assert_raises(ImageNotFound, self.image.read, 0, 256)
        self.image.set_snap(None)
        read = self.image.read(0, 256)
        eq(read, data)

    def test_set_snap_recreated(self):
        self.image.write(b"\0" * 256, 0)
        self.image.create_snap("snap1")
        read = self.image.read(0, 256)
        eq(read, b"\0" * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap("snap1")
        self.image.remove_snap("snap1")
        self.image.create_snap("snap1")
        assert_raises(ImageNotFound, self.image.read, 0, 256)
        self.image.set_snap(None)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.remove_snap("snap1")

    def test_lock_unlock(self):
        assert_raises(ImageNotFound, self.image.unlock, "")
        self.image.lock_exclusive("")
        assert_raises(ImageExists, self.image.lock_exclusive, "")
        assert_raises(ImageBusy, self.image.lock_exclusive, "test")
        assert_raises(ImageExists, self.image.lock_shared, "", "")
        assert_raises(ImageBusy, self.image.lock_shared, "foo", "")
        self.image.unlock("")

    def test_list_lockers(self):
        eq([], self.image.list_lockers())
        self.image.lock_exclusive("test")
        lockers = self.image.list_lockers()
        eq(1, len(lockers["lockers"]))
        _, cookie, _ = lockers["lockers"][0]
        eq(cookie, "test")
        eq("", lockers["tag"])
        assert lockers["exclusive"]
        self.image.unlock("test")
        eq([], self.image.list_lockers())

        num_shared = 10
        for i in range(num_shared):
            self.image.lock_shared(str(i), "tag")
        lockers = self.image.list_lockers()
        eq("tag", lockers["tag"])
        assert not lockers["exclusive"]
        eq(num_shared, len(lockers["lockers"]))
        cookies = sorted(map(lambda x: x[1], lockers["lockers"]))
        for i in range(num_shared):
            eq(str(i), cookies[i])
            self.image.unlock(str(i))
        eq([], self.image.list_lockers())

    def test_diff_iterate(self):
        check_diff(self.image, 0, IMG_SIZE, None, [])
        self.image.write(b"a" * 256, 0)
        check_diff(self.image, 0, IMG_SIZE, None, [(0, 256, True)])
        self.image.write(b"b" * 256, 256)
        check_diff(self.image, 0, IMG_SIZE, None, [(0, 512, True)])
        self.image.discard(128, 256)
        check_diff(self.image, 0, IMG_SIZE, None, [(0, 512, True)])

        self.image.create_snap("snap1")
        self.image.discard(0, 1 << IMG_ORDER)
        self.image.create_snap("snap2")
        self.image.set_snap("snap2")
        check_diff(self.image, 0, IMG_SIZE, "snap1", [(0, 512, False)])
        self.image.remove_snap("snap1")
        self.image.remove_snap("snap2")
示例#7
0
class TestImage(object):
    def setUp(self):
        self.rbd = RBD()
        create_image()
        self.image = Image(ioctx, image_name)

    def tearDown(self):
        self.image.close()
        remove_image()

    def test_invalidate_cache(self):
        self.image.write('abc', 0)
        eq('abc', self.image.read(0, 3))
        self.image.invalidate_cache()
        eq('abc', self.image.read(0, 3))

    def test_stat(self):
        info = self.image.stat()
        check_stat(info, IMG_SIZE, IMG_ORDER)

    def test_flags(self):
        flags = self.image.flags()
        eq(0, flags)

    def test_write(self):
        data = rand_data(256)
        self.image.write(data, 0)

    def test_read(self):
        data = self.image.read(0, 20)
        eq(data, '\0' * 20)

    def test_large_write(self):
        data = rand_data(IMG_SIZE)
        self.image.write(data, 0)

    def test_large_read(self):
        data = self.image.read(0, IMG_SIZE)
        eq(data, '\0' * IMG_SIZE)

    def test_write_read(self):
        data = rand_data(256)
        offset = 50
        self.image.write(data, offset)
        read = self.image.read(offset, 256)
        eq(data, read)

    def test_read_bad_offset(self):
        assert_raises(InvalidArgument, self.image.read, IMG_SIZE + 1, IMG_SIZE)

    def test_resize(self):
        new_size = IMG_SIZE * 2
        self.image.resize(new_size)
        info = self.image.stat()
        check_stat(info, new_size, IMG_ORDER)

    def test_size(self):
        eq(IMG_SIZE, self.image.size())
        self.image.create_snap('snap1')
        new_size = IMG_SIZE * 2
        self.image.resize(new_size)
        eq(new_size, self.image.size())
        self.image.create_snap('snap2')
        self.image.set_snap('snap2')
        eq(new_size, self.image.size())
        self.image.set_snap('snap1')
        eq(IMG_SIZE, self.image.size())
        self.image.set_snap(None)
        eq(new_size, self.image.size())
        self.image.remove_snap('snap1')
        self.image.remove_snap('snap2')

    def test_resize_down(self):
        new_size = IMG_SIZE / 2
        data = rand_data(256)
        self.image.write(data, IMG_SIZE / 2)
        self.image.resize(new_size)
        self.image.resize(IMG_SIZE)
        read = self.image.read(IMG_SIZE / 2, 256)
        eq('\0' * 256, read)

    def test_resize_bytes(self):
        new_size = IMG_SIZE / 2 - 5
        data = rand_data(256)
        self.image.write(data, IMG_SIZE / 2 - 10)
        self.image.resize(new_size)
        self.image.resize(IMG_SIZE)
        read = self.image.read(IMG_SIZE / 2 - 10, 5)
        eq(data[:5], read)
        read = self.image.read(IMG_SIZE / 2 - 5, 251)
        eq('\0' * 251, read)

    def test_copy(self):
        global ioctx
        data = rand_data(256)
        self.image.write(data, 256)
        image_name = get_temp_image_name()
        self.image.copy(ioctx, image_name)
        assert_raises(ImageExists, self.image.copy, ioctx, image_name)
        copy = Image(ioctx, image_name)
        copy_data = copy.read(256, 256)
        copy.close()
        self.rbd.remove(ioctx, image_name)
        eq(data, copy_data)

    def test_create_snap(self):
        global ioctx
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        at_snapshot = Image(ioctx, image_name, 'snap1')
        snap_data = at_snapshot.read(0, 256)
        at_snapshot.close()
        eq(snap_data, '\0' * 256)
        self.image.remove_snap('snap1')

    def test_list_snaps(self):
        eq([], list(self.image.list_snaps()))
        self.image.create_snap('snap1')
        eq(['snap1'], map(lambda snap: snap['name'], self.image.list_snaps()))
        self.image.create_snap('snap2')
        eq(['snap1', 'snap2'],
           map(lambda snap: snap['name'], self.image.list_snaps()))
        self.image.remove_snap('snap1')
        self.image.remove_snap('snap2')

    def test_remove_snap(self):
        eq([], list(self.image.list_snaps()))
        self.image.create_snap('snap1')
        eq(['snap1'], map(lambda snap: snap['name'], self.image.list_snaps()))
        self.image.remove_snap('snap1')
        eq([], list(self.image.list_snaps()))

    @require_features([RBD_FEATURE_LAYERING])
    def test_protect_snap(self):
        self.image.create_snap('snap1')
        assert (not self.image.is_protected_snap('snap1'))
        self.image.protect_snap('snap1')
        assert (self.image.is_protected_snap('snap1'))
        assert_raises(ImageBusy, self.image.remove_snap, 'snap1')
        self.image.unprotect_snap('snap1')
        assert (not self.image.is_protected_snap('snap1'))
        self.image.remove_snap('snap1')
        assert_raises(ImageNotFound, self.image.unprotect_snap, 'snap1')
        assert_raises(ImageNotFound, self.image.is_protected_snap, 'snap1')

    @require_features([RBD_FEATURE_EXCLUSIVE_LOCK])
    def test_remove_with_exclusive_lock(self):
        assert_raises(ImageBusy, remove_image)

    @blacklist_features([RBD_FEATURE_EXCLUSIVE_LOCK])
    def test_remove_with_snap(self):
        self.image.create_snap('snap1')
        assert_raises(ImageHasSnapshots, remove_image)
        self.image.remove_snap('snap1')

    @blacklist_features([RBD_FEATURE_EXCLUSIVE_LOCK])
    def test_remove_with_watcher(self):
        data = rand_data(256)
        self.image.write(data, 0)
        assert_raises(ImageBusy, remove_image)
        read = self.image.read(0, 256)
        eq(read, data)

    def test_rollback_to_snap(self):
        self.image.write('\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.rollback_to_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        self.image.remove_snap('snap1')

    def test_rollback_to_snap_sparse(self):
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.rollback_to_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        self.image.remove_snap('snap1')

    def test_rollback_with_resize(self):
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, data)
        new_size = IMG_SIZE * 2
        self.image.resize(new_size)
        check_stat(self.image.stat(), new_size, IMG_ORDER)
        self.image.write(data, new_size - 256)
        self.image.create_snap('snap2')
        read = self.image.read(new_size - 256, 256)
        eq(read, data)
        self.image.rollback_to_snap('snap1')
        check_stat(self.image.stat(), IMG_SIZE, IMG_ORDER)
        assert_raises(InvalidArgument, self.image.read, new_size - 256, 256)
        self.image.rollback_to_snap('snap2')
        check_stat(self.image.stat(), new_size, IMG_ORDER)
        read = self.image.read(new_size - 256, 256)
        eq(read, data)
        self.image.remove_snap('snap1')
        self.image.remove_snap('snap2')

    def test_set_snap(self):
        self.image.write('\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        self.image.remove_snap('snap1')

    def test_set_no_snap(self):
        self.image.write('\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        self.image.set_snap(None)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.remove_snap('snap1')

    def test_set_snap_sparse(self):
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        self.image.remove_snap('snap1')

    def test_many_snaps(self):
        num_snaps = 200
        for i in xrange(num_snaps):
            self.image.create_snap(str(i))
        snaps = sorted(self.image.list_snaps(),
                       key=lambda snap: int(snap['name']))
        eq(len(snaps), num_snaps)
        for i, snap in enumerate(snaps):
            eq(snap['size'], IMG_SIZE)
            eq(snap['name'], str(i))
        for i in xrange(num_snaps):
            self.image.remove_snap(str(i))

    def test_set_snap_deleted(self):
        self.image.write('\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        self.image.remove_snap('snap1')
        assert_raises(ImageNotFound, self.image.read, 0, 256)
        self.image.set_snap(None)
        read = self.image.read(0, 256)
        eq(read, data)

    def test_set_snap_recreated(self):
        self.image.write('\0' * 256, 0)
        self.image.create_snap('snap1')
        read = self.image.read(0, 256)
        eq(read, '\0' * 256)
        data = rand_data(256)
        self.image.write(data, 0)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.set_snap('snap1')
        self.image.remove_snap('snap1')
        self.image.create_snap('snap1')
        assert_raises(ImageNotFound, self.image.read, 0, 256)
        self.image.set_snap(None)
        read = self.image.read(0, 256)
        eq(read, data)
        self.image.remove_snap('snap1')

    def test_lock_unlock(self):
        assert_raises(ImageNotFound, self.image.unlock, '')
        self.image.lock_exclusive('')
        assert_raises(ImageExists, self.image.lock_exclusive, '')
        assert_raises(ImageBusy, self.image.lock_exclusive, 'test')
        assert_raises(ImageExists, self.image.lock_shared, '', '')
        assert_raises(ImageBusy, self.image.lock_shared, 'foo', '')
        self.image.unlock('')

    def test_list_lockers(self):
        eq([], self.image.list_lockers())
        self.image.lock_exclusive('test')
        lockers = self.image.list_lockers()
        eq(1, len(lockers['lockers']))
        _, cookie, _ = lockers['lockers'][0]
        eq(cookie, 'test')
        eq('', lockers['tag'])
        assert lockers['exclusive']
        self.image.unlock('test')
        eq([], self.image.list_lockers())

        num_shared = 10
        for i in xrange(num_shared):
            self.image.lock_shared(str(i), 'tag')
        lockers = self.image.list_lockers()
        eq('tag', lockers['tag'])
        assert not lockers['exclusive']
        eq(num_shared, len(lockers['lockers']))
        cookies = sorted(map(lambda x: x[1], lockers['lockers']))
        for i in xrange(num_shared):
            eq(str(i), cookies[i])
            self.image.unlock(str(i))
        eq([], self.image.list_lockers())

    def test_diff_iterate(self):
        check_diff(self.image, 0, IMG_SIZE, None, [])
        self.image.write('a' * 256, 0)
        check_diff(self.image, 0, IMG_SIZE, None, [(0, 256, True)])
        self.image.write('b' * 256, 256)
        check_diff(self.image, 0, IMG_SIZE, None, [(0, 512, True)])
        self.image.discard(128, 256)
        check_diff(self.image, 0, IMG_SIZE, None, [(0, 512, True)])

        self.image.create_snap('snap1')
        self.image.discard(0, 1 << IMG_ORDER)
        self.image.create_snap('snap2')
        self.image.set_snap('snap2')
        check_diff(self.image, 0, IMG_SIZE, 'snap1', [(0, 512, False)])
        self.image.remove_snap('snap1')
        self.image.remove_snap('snap2')