iotests: Add test for dataplane mirroring

Signed-off-by: NMax Reitz <mreitz@redhat.com>
Message-id: 20170929170843.3711-1-mreitz@redhat.com
Reviewed-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NMax Reitz <mreitz@redhat.com>

tests/qemu-iotests/127

+#!/bin/bash
+#
+# Test case for mirroring with dataplane
+#
+# Copyright (C) 2017 Red Hat, Inc.
+#
+# 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/>.
+#
+
+# creator
+owner=mreitz@redhat.com
+
+seq=$(basename $0)
+echo "QA output created by $seq"
+
+here=$PWD
+status=1    # failure is the default!
+
+_cleanup()
+{
+    _cleanup_qemu
+    _cleanup_test_img
+    _rm_test_img "$TEST_IMG.overlay0"
+    _rm_test_img "$TEST_IMG.overlay1"
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and qemu instance handling
+. ./common.rc
+. ./common.filter
+. ./common.qemu
+
+_supported_fmt qcow2
+_supported_proto file
+_supported_os Linux
+
+IMG_SIZE=64K
+
+_make_test_img $IMG_SIZE
+TEST_IMG="$TEST_IMG.overlay0" _make_test_img -b "$TEST_IMG" $IMG_SIZE
+TEST_IMG="$TEST_IMG.overlay1" _make_test_img -b "$TEST_IMG" $IMG_SIZE
+
+# So that we actually have something to mirror and the job does not return
+# immediately (which may be bad because then we cannot know whether the
+# 'return' or the 'BLOCK_JOB_READY' comes first).
+$QEMU_IO -c 'write 0 42' "$TEST_IMG.overlay0" | _filter_qemu_io
+
+# We cannot use virtio-blk here because that does not actually set the attached
+# BB's AioContext in qtest mode
+_launch_qemu \
+    -object iothread,id=iothr \
+    -blockdev node-name=source,driver=$IMGFMT,file.driver=file,file.filename="$TEST_IMG.overlay0" \
+    -device virtio-scsi,id=scsi-bus,iothread=iothr \
+    -device scsi-hd,bus=scsi-bus.0,drive=source
+
+_send_qemu_cmd $QEMU_HANDLE \
+    "{ 'execute': 'qmp_capabilities' }" \
+    'return'
+
+_send_qemu_cmd $QEMU_HANDLE \
+    "{ 'execute': 'drive-mirror',
+       'arguments': {
+           'job-id': 'mirror',
+           'device': 'source',
+           'target': '$TEST_IMG.overlay1',
+           'mode':   'existing',
+           'sync':   'top'
+       } }" \
+    'BLOCK_JOB_READY'
+
+# The backing BDS should be assigned the overlay's AioContext
+_send_qemu_cmd $QEMU_HANDLE \
+    "{ 'execute': 'block-job-complete',
+       'arguments': { 'device': 'mirror' } }" \
+    'BLOCK_JOB_COMPLETED'
+
+_send_qemu_cmd $QEMU_HANDLE \
+    "{ 'execute': 'quit' }" \
+    'return'
+
+wait=yes _cleanup_qemu
+
+# success, all done
+echo '*** done'
+rm -f $seq.full
+status=0

tests/qemu-iotests/127.out

+QA output created by 127
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=65536
+Formatting 'TEST_DIR/t.IMGFMT.overlay0', fmt=IMGFMT size=65536 backing_file=TEST_DIR/t.IMGFMT
+Formatting 'TEST_DIR/t.IMGFMT.overlay1', fmt=IMGFMT size=65536 backing_file=TEST_DIR/t.IMGFMT
+wrote 42/42 bytes at offset 0
+42 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+{"return": {}}
+{"return": {}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "BLOCK_JOB_READY", "data": {"device": "mirror", "len": 65536, "offset": 65536, "speed": 0, "type": "mirror"}}
+{"return": {}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "mirror", "len": 65536, "offset": 65536, "speed": 0, "type": "mirror"}}
+{"return": {}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false}}
+*** done

tests/qemu-iotests/group

@@ -133,6 +133,7 @@
 124 rw auto backing
 125 rw auto
 126 rw auto backing
+127 rw auto backing quick
 128 rw auto quick
 129 rw auto quick
 130 rw auto quick