[PATCH v12 08/14] iotests: add #310 to test bottom node in COR driver

[Andrey Shinkevich via <qemu-devel@nongnu.org>]

The test case #310 is similar to #216 by Max Reitz. The difference is
that the test #310 involves a bottom node to the COR filter driver.

Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
---
 tests/qemu-iotests/310     | 109 +++++++++++++++++++++++++++++++++++++++++++++
 tests/qemu-iotests/310.out |  15 +++++++
 tests/qemu-iotests/group   |   3 +-
 3 files changed, 126 insertions(+), 1 deletion(-)
 create mode 100755 tests/qemu-iotests/310
 create mode 100644 tests/qemu-iotests/310.out

diff --git a/tests/qemu-iotests/310 b/tests/qemu-iotests/310
new file mode 100755
index 0000000..5ad7ad2
--- /dev/null
+++ b/tests/qemu-iotests/310
@@ -0,0 +1,109 @@
+#!/usr/bin/env python3
+#
+# Copy-on-read tests using a COR filter with a bottom node
+#
+# Copyright (c) 2020 Virtuozzo International GmbH
+#
+# 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 iotests
+from iotests import log, qemu_img, qemu_io_silent
+
+# Need backing file support
+iotests.script_initialize(supported_fmts=['qcow2', 'qcow', 'qed', 'vmdk'],
+                          supported_platforms=['linux'])
+
+log('')
+log('=== Copy-on-read across nodes ===')
+log('')
+
+# This test is similar to the 216 one by Max Reitz <mreitz@redhat.com>
+# The difference is that this test case involves a bottom node to the
+# COR filter driver.
+
+with iotests.FilePath('base.img') as base_img_path, \
+     iotests.FilePath('mid.img') as mid_img_path, \
+     iotests.FilePath('top.img') as top_img_path, \
+     iotests.VM() as vm:
+
+    log('--- Setting up images ---')
+    log('')
+
+    assert qemu_img('create', '-f', iotests.imgfmt, base_img_path, '64M') == 0
+    assert qemu_io_silent(base_img_path, '-c', 'write -P 1 0M 1M') == 0
+    assert qemu_io_silent(base_img_path, '-c', 'write -P 1 3M 1M') == 0
+    assert qemu_img('create', '-f', iotests.imgfmt, '-b', base_img_path,
+                    '-F', iotests.imgfmt, mid_img_path) == 0
+    assert qemu_io_silent(mid_img_path,  '-c', 'write -P 3 2M 1M') == 0
+    assert qemu_io_silent(mid_img_path,  '-c', 'write -P 3 4M 1M') == 0
+    assert qemu_img('create', '-f', iotests.imgfmt, '-b', mid_img_path,
+                    '-F', iotests.imgfmt, top_img_path) == 0
+    assert qemu_io_silent(top_img_path,  '-c', 'write -P 2 1M 1M') == 0
+
+    log('Done')
+
+    log('')
+    log('--- Doing COR ---')
+    log('')
+
+    vm.launch()
+
+    log(vm.qmp('blockdev-add',
+                    node_name='node0',
+                    driver='copy-on-read',
+                    bottom='node2',
+                    file={
+                        'driver': iotests.imgfmt,
+                            'file': {
+                                'driver': 'file',
+                                'filename': top_img_path
+                            },
+                            'backing': {
+                                'node-name': 'node2',
+                                'driver': iotests.imgfmt,
+                                'file': {
+                                    'driver': 'file',
+                                    'filename': mid_img_path
+                                },
+                                'backing': {
+                                    #'node-name': 'node2',
+                                    'driver': iotests.imgfmt,
+                                    'file': {
+                                        'driver': 'file',
+                                        'filename': base_img_path
+                                    }
+                                },
+                            }
+                    }))
+
+    # Trigger COR
+    log(vm.qmp('human-monitor-command',
+               command_line='qemu-io node0 "read 0 5M"'))
+
+    vm.shutdown()
+
+    log('')
+    log('--- Checking COR result ---')
+    log('')
+
+    assert qemu_io_silent(base_img_path, '-c', 'discard 0 4M') == 0
+    assert qemu_io_silent(mid_img_path, '-c', 'discard 0M 5M') == 0
+    assert qemu_io_silent(top_img_path,  '-c', 'read -P 1 0M 1M') != 0
+    assert qemu_io_silent(top_img_path,  '-c', 'read -P 2 1M 1M') == 0
+    assert qemu_io_silent(top_img_path,  '-c', 'read -P 3 2M 1M') == 0
+    assert qemu_io_silent(top_img_path,  '-c', 'read -P 1 3M 1M') != 0
+    assert qemu_io_silent(top_img_path,  '-c', 'read -P 3 4M 1M') == 0
+
+    log('Done')
diff --git a/tests/qemu-iotests/310.out b/tests/qemu-iotests/310.out
new file mode 100644
index 0000000..a70aa5c
--- /dev/null
+++ b/tests/qemu-iotests/310.out
@@ -0,0 +1,15 @@
+
+=== Copy-on-read across nodes ===
+
+--- Setting up images ---
+
+Done
+
+--- Doing COR ---
+
+{"return": {}}
+{"return": ""}
+
+--- Checking COR result ---
+
+Done
diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group
index 3432989..769029b 100644
--- a/tests/qemu-iotests/group
+++ b/tests/qemu-iotests/group
@@ -314,4 +314,5 @@
 303 rw quick
 304 rw quick
 305 rw quick
-307 rw quick export
+307 rw quick
+310 rw quick export
-- 
1.8.3.1