From: Fam Zheng <address@hidden>
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 <address@hidden>
[vsementsov: add -f iotests.imgfmt to qemu_io, fix target_img to be
always qcow2, add -r to qemu_io for nbd, add fleecing-filter layer,
wrap long lines]
Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>
---
tests/qemu-iotests/222 | 112 +++++++++++++++++++++++++++++++++++++++++++++
tests/qemu-iotests/222.out | 5 ++
tests/qemu-iotests/group | 1 +
3 files changed, 118 insertions(+)
create mode 100755 tests/qemu-iotests/222
create mode 100644 tests/qemu-iotests/222.out
diff --git a/tests/qemu-iotests/222 b/tests/qemu-iotests/222
new file mode 100755
index 0000000000..3bcf9505fd
--- /dev/null
+++ b/tests/qemu-iotests/222
@@ -0,0 +1,112 @@
+#!/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('-f', iotests.imgfmt, '-c', 'write -P%s %s %s' % p,
+ test_img)
+
+ qemu_img('create', '-f', 'qcow2', 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, '-r', '-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", **{
+ "driver": "fleecing-filter",
+ "node-name": "drive1",
+ "file": {
+ "driver": "qcow2",
+ "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/222.out b/tests/qemu-iotests/222.out
new file mode 100644
index 0000000000..ae1213e6f8
--- /dev/null
+++ b/tests/qemu-iotests/222.out
@@ -0,0 +1,5 @@
+.
+----------------------------------------------------------------------
+Ran 1 tests
+
+OK
diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group
index eea75819d2..8019a9f721 100644
--- a/tests/qemu-iotests/group
+++ b/tests/qemu-iotests/group
@@ -220,3 +220,4 @@
218 rw auto quick
219 rw auto
221 rw auto quick
+222 rw auto quick