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Blame SOURCES/kvm-iotests-Test-external-snapshot-with-VM-state.patch

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From 38b0cff9703fc740c30f5874973ac1be88f94d9f Mon Sep 17 00:00:00 2001
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From: Kevin Wolf <kwolf@redhat.com>
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Date: Fri, 7 Feb 2020 11:24:03 +0000
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Subject: [PATCH 06/18] iotests: Test external snapshot with VM state
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RH-Author: Kevin Wolf <kwolf@redhat.com>
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Message-id: <20200207112404.25198-6-kwolf@redhat.com>
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Patchwork-id: 93752
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O-Subject: [RHEL-AV-8.2.0 qemu-kvm PATCH v2 5/6] iotests: Test external snapshot with VM state
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Bugzilla: 1781637
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RH-Acked-by: Sergio Lopez Pascual <slp@redhat.com>
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RH-Acked-by: Max Reitz <mreitz@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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This tests creating an external snapshot with VM state (which results in
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an active overlay over an inactive backing file, which is also the root
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node of an inactive BlockBackend), re-activating the images and
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performing some operations to test that the re-activation worked as
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intended.
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit f62f08ab7a9d902da70078992248ec5c98f652ad)
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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 tests/qemu-iotests/280     | 83 ++++++++++++++++++++++++++++++++++++++++++++++
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 tests/qemu-iotests/280.out | 50 ++++++++++++++++++++++++++++
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 tests/qemu-iotests/group   |  1 +
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 3 files changed, 134 insertions(+)
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 create mode 100755 tests/qemu-iotests/280
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 create mode 100644 tests/qemu-iotests/280.out
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diff --git a/tests/qemu-iotests/280 b/tests/qemu-iotests/280
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new file mode 100755
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index 0000000..0b1fa8e
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--- /dev/null
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+++ b/tests/qemu-iotests/280
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@@ -0,0 +1,83 @@
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+#!/usr/bin/env python
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+#
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+# Copyright (C) 2019 Red Hat, Inc.
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+#
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+# This program is free software; you can redistribute it and/or modify
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+# it under the terms of the GNU General Public License as published by
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+# the Free Software Foundation; either version 2 of the License, or
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+# (at your option) any later version.
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+#
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+# This program is distributed in the hope that it will be useful,
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+# but WITHOUT ANY WARRANTY; without even the implied warranty of
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+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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+# GNU General Public License for more details.
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+#
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+# You should have received a copy of the GNU General Public License
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+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
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+#
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+# Creator/Owner: Kevin Wolf <kwolf@redhat.com>
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+#
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+# Test migration to file for taking an external snapshot with VM state.
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+
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+import iotests
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+import os
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+
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+iotests.verify_image_format(supported_fmts=['qcow2'])
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+iotests.verify_protocol(supported=['file'])
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+iotests.verify_platform(['linux'])
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+
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+with iotests.FilePath('base') as base_path , \
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+     iotests.FilePath('top') as top_path, \
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+     iotests.VM() as vm:
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+
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+    iotests.qemu_img_log('create', '-f', iotests.imgfmt, base_path, '64M')
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+
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+    iotests.log('=== Launch VM ===')
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+    vm.add_object('iothread,id=iothread0')
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+    vm.add_blockdev('file,filename=%s,node-name=base-file' % (base_path))
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+    vm.add_blockdev('%s,file=base-file,node-name=base-fmt' % (iotests.imgfmt))
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+    vm.add_device('virtio-blk,drive=base-fmt,iothread=iothread0,id=vda')
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+    vm.launch()
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+
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+    vm.enable_migration_events('VM')
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+
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+    iotests.log('\n=== Migrate to file ===')
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+    vm.qmp_log('migrate', uri='exec:cat > /dev/null')
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+
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+    with iotests.Timeout(3, 'Migration does not complete'):
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+        vm.wait_migration()
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+
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+    iotests.log('\nVM is now stopped:')
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+    iotests.log(vm.qmp('query-migrate')['return']['status'])
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+    vm.qmp_log('query-status')
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+
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+    iotests.log('\n=== Create a snapshot of the disk image ===')
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+    vm.blockdev_create({
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+        'driver': 'file',
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+        'filename': top_path,
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+        'size': 0,
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+    })
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+    vm.qmp_log('blockdev-add', node_name='top-file',
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+               driver='file', filename=top_path,
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+               filters=[iotests.filter_qmp_testfiles])
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+
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+    vm.blockdev_create({
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+        'driver': iotests.imgfmt,
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+        'file': 'top-file',
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+        'size': 1024 * 1024,
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+    })
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+    vm.qmp_log('blockdev-add', node_name='top-fmt',
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+               driver=iotests.imgfmt, file='top-file')
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+
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+    vm.qmp_log('blockdev-snapshot', node='base-fmt', overlay='top-fmt')
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+
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+    iotests.log('\n=== Resume the VM and simulate a write request ===')
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+    vm.qmp_log('cont')
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+    iotests.log(vm.hmp_qemu_io('-d vda/virtio-backend', 'write 4k 4k'))
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+
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+    iotests.log('\n=== Commit it to the backing file ===')
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+    result = vm.qmp_log('block-commit', job_id='job0', auto_dismiss=False,
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+                        device='top-fmt', top_node='top-fmt',
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+                        filters=[iotests.filter_qmp_testfiles])
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+    if 'return' in result:
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+        vm.run_job('job0')
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diff --git a/tests/qemu-iotests/280.out b/tests/qemu-iotests/280.out
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new file mode 100644
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index 0000000..5d382fa
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--- /dev/null
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+++ b/tests/qemu-iotests/280.out
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@@ -0,0 +1,50 @@
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+Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=67108864 cluster_size=65536 lazy_refcounts=off refcount_bits=16
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+
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+=== Launch VM ===
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+Enabling migration QMP events on VM...
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+{"return": {}}
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+
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+=== Migrate to file ===
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+{"execute": "migrate", "arguments": {"uri": "exec:cat > /dev/null"}}
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+{"return": {}}
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+{"data": {"status": "setup"}, "event": "MIGRATION", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
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+{"data": {"status": "active"}, "event": "MIGRATION", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
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+{"data": {"status": "completed"}, "event": "MIGRATION", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
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+
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+VM is now stopped:
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+completed
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+{"execute": "query-status", "arguments": {}}
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+{"return": {"running": false, "singlestep": false, "status": "postmigrate"}}
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+
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+=== Create a snapshot of the disk image ===
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+{"execute": "blockdev-create", "arguments": {"job-id": "job0", "options": {"driver": "file", "filename": "TEST_DIR/PID-top", "size": 0}}}
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+{"return": {}}
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+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
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+{"return": {}}
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+
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+{"execute": "blockdev-add", "arguments": {"driver": "file", "filename": "TEST_DIR/PID-top", "node-name": "top-file"}}
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+{"return": {}}
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+{"execute": "blockdev-create", "arguments": {"job-id": "job0", "options": {"driver": "qcow2", "file": "top-file", "size": 1048576}}}
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+{"return": {}}
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+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
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+{"return": {}}
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+
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+{"execute": "blockdev-add", "arguments": {"driver": "qcow2", "file": "top-file", "node-name": "top-fmt"}}
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+{"return": {}}
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+{"execute": "blockdev-snapshot", "arguments": {"node": "base-fmt", "overlay": "top-fmt"}}
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+{"return": {}}
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+
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+=== Resume the VM and simulate a write request ===
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+{"execute": "cont", "arguments": {}}
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+{"return": {}}
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+{"return": ""}
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+
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+=== Commit it to the backing file ===
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+{"execute": "block-commit", "arguments": {"auto-dismiss": false, "device": "top-fmt", "job-id": "job0", "top-node": "top-fmt"}}
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+{"return": {}}
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+{"execute": "job-complete", "arguments": {"id": "job0"}}
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+{"return": {}}
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+{"data": {"device": "job0", "len": 65536, "offset": 65536, "speed": 0, "type": "commit"}, "event": "BLOCK_JOB_READY", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
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+{"data": {"device": "job0", "len": 65536, "offset": 65536, "speed": 0, "type": "commit"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
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+{"execute": "job-dismiss", "arguments": {"id": "job0"}}
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+{"return": {}}
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diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group
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index 06cc734..01301cd 100644
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--- a/tests/qemu-iotests/group
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+++ b/tests/qemu-iotests/group
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@@ -286,3 +286,4 @@
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 272 rw
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 273 backing quick
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 277 rw quick
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+280 rw migration quick
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-- 
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1.8.3.1
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