This tests the workflow of creating a lightweight point-in-time snapshot with blockdev-backup command, and exporting it with built-in NBD server.
It's tested that any post-snapshot writing to the original device doesn't change data seen in NBD target. Signed-off-by: Fam Zheng <f...@redhat.com> --- tests/qemu-iotests/089 | 99 ++++++++++++++++++++++++++++++++++++++++++++++ tests/qemu-iotests/089.out | 5 +++ tests/qemu-iotests/group | 1 + 3 files changed, 105 insertions(+) create mode 100755 tests/qemu-iotests/089 create mode 100644 tests/qemu-iotests/089.out diff --git a/tests/qemu-iotests/089 b/tests/qemu-iotests/089 new file mode 100755 index 0000000..8be32d7 --- /dev/null +++ b/tests/qemu-iotests/089 @@ -0,0 +1,99 @@ +#!/usr/bin/env python +# +# Tests for image fleecing (point in time snapshot export to NBD) +# +# Copyright (C) 2014 Red Hat, Inc. +# +# Based on 055. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. +# + +import time +import os +import iotests +from iotests import qemu_img, qemu_io + +test_img = os.path.join(iotests.test_dir, 'test.img') +target_img = os.path.join(iotests.test_dir, 'target.img') +nbd_sock = os.path.join(iotests.test_dir, 'nbd.sock') + +class TestImageFleecing(iotests.QMPTestCase): + image_len = 64 * 1024 * 1024 # MB + + def setUp(self): + # Write data to the image so we can compare later + qemu_img('create', '-f', iotests.imgfmt, test_img, str(TestImageFleecing.image_len)) + self.patterns = [ + ("0x5d", "0", "64k"), + ("0xd5", "1M", "64k"), + ("0xdc", "32M", "64k"), + ("0xdc", "67043328", "64k")] + + for p in self.patterns: + qemu_io('-c', 'write -P%s %s %s' % p, test_img) + + qemu_img('create', '-f', iotests.imgfmt, target_img, str(TestImageFleecing.image_len)) + + self.vm = iotests.VM().add_drive(test_img) + self.vm.launch() + + self.overwrite_patterns = [ + ("0xa0", "0", "64k"), + ("0x0a", "1M", "64k"), + ("0x55", "32M", "64k"), + ("0x56", "67043328", "64k")] + + self.nbd_uri = "nbd+unix:///drive1?socket=%s" % nbd_sock + + def tearDown(self): + self.vm.shutdown() + os.remove(test_img) + os.remove(target_img) + + def verify_patterns(self): + for p in self.patterns: + self.assertEqual(-1, qemu_io(self.nbd_uri, '-c', 'read -P%s %s %s' % p).find("verification failed"), + "Failed to verify pattern: %s %s %s" % p) + + def test_image_fleecing(self): + result = self.vm.qmp("blockdev-add", **{"options": { + "driver": "qcow2", + "id": "drive1", + "file": { + "driver": "file", + "filename": target_img, + }, + "backing": "drive0", + }}) + self.assert_qmp(result, 'return', {}) + result = self.vm.qmp("nbd-server-start", **{"addr": { "type": "unix", "data": { "path": nbd_sock } } }) + self.assert_qmp(result, 'return', {}) + result = self.vm.qmp("blockdev-backup", device="drive0", target="drive1", sync="none") + self.assert_qmp(result, 'return', {}) + result = self.vm.qmp("nbd-server-add", device="drive1") + self.assert_qmp(result, 'return', {}) + + self.verify_patterns() + + for p in self.overwrite_patterns: + self.vm.hmp_qemu_io("drive0", "write -P%s %s %s" % p) + + self.verify_patterns() + + self.cancel_and_wait(resume=True) + self.assert_no_active_block_jobs() + +if __name__ == '__main__': + iotests.main(supported_fmts=['raw', 'qcow2']) diff --git a/tests/qemu-iotests/089.out b/tests/qemu-iotests/089.out new file mode 100644 index 0000000..ae1213e --- /dev/null +++ b/tests/qemu-iotests/089.out @@ -0,0 +1,5 @@ +. +---------------------------------------------------------------------- +Ran 1 tests + +OK diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group index 864643d..e975e93 100644 --- a/tests/qemu-iotests/group +++ b/tests/qemu-iotests/group @@ -95,3 +95,4 @@ 086 rw auto quick 087 rw auto 088 rw auto +089 rw auto quick -- 1.9.1
