iotests: Add test for eject under NBD server

This patch adds a test for ejecting the BlockBackend an NBD server is
connected to (the NBD server is supposed to stop).

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

tests/qemu-iotests/140

+#!/bin/bash
+#
+# Test case for ejecting a BB with an NBD server attached to it
+#
+# Copyright (C) 2016 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"
+tmp=/tmp/$$
+status=1	# failure is the default!
+
+_cleanup()
+{
+    _cleanup_test_img
+    rm -f "$TEST_DIR/nbd"
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common.rc
+. ./common.filter
+. ./common.qemu
+
+_supported_fmt generic
+_supported_proto file
+_supported_os Linux
+
+_make_test_img 64k
+
+$QEMU_IO -c 'write -P 42 0 64k' "$TEST_IMG" | _filter_qemu_io
+
+keep_stderr=y \
+_launch_qemu -drive if=ide,media=cdrom,id=drv,file="$TEST_IMG",format=$IMGFMT \
+    2> >(_filter_nbd)
+
+_send_qemu_cmd $QEMU_HANDLE \
+    "{ 'execute': 'qmp_capabilities' }" \
+    'return'
+
+_send_qemu_cmd $QEMU_HANDLE \
+    "{ 'execute': 'nbd-server-start',
+       'arguments': { 'addr': { 'type': 'unix',
+                                'data': { 'path': '$TEST_DIR/nbd' }}}}" \
+    'return'
+
+_send_qemu_cmd $QEMU_HANDLE \
+    "{ 'execute': 'nbd-server-add',
+       'arguments': { 'device': 'drv' }}" \
+    'return'
+
+$QEMU_IO_PROG -f raw -c 'read -P 42 0 64k' \
+    "nbd+unix:///drv?socket=$TEST_DIR/nbd" 2>&1 \
+    | _filter_qemu_io | _filter_nbd
+
+_send_qemu_cmd $QEMU_HANDLE \
+    "{ 'execute': 'eject',
+       'arguments': { 'device': 'drv' }}" \
+    'return'
+
+$QEMU_IO_PROG -f raw -c close \
+    "nbd+unix:///drv?socket=$TEST_DIR/nbd" 2>&1 \
+    | _filter_qemu_io | _filter_nbd
+
+_send_qemu_cmd $QEMU_HANDLE \
+    "{ 'execute': 'quit' }" \
+    'return'
+
+wait=1 _cleanup_qemu
+
+# success, all done
+echo '*** done'
+rm -f $seq.full
+status=0

tests/qemu-iotests/140.out

+QA output created by 140
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=65536
+wrote 65536/65536 bytes at offset 0
+64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+{"return": {}}
+{"return": {}}
+{"return": {}}
+read 65536/65536 bytes at offset 0
+64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "DEVICE_TRAY_MOVED", "data": {"device": "drv", "tray-open": true}}
+{"return": {}}
+can't open device nbd+unix:///drv?socket=TEST_DIR/nbd: Failed to read export length
+no file open, try 'help open'
+{"return": {}}
+{"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "SHUTDOWN"}
+*** done

tests/qemu-iotests/group

@@ -141,5 +141,6 @@
 137 rw auto
 138 rw auto quick
 139 rw auto quick
+140 rw auto quick
 142 auto
 143 auto quick