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#!/bin/bash
#
# Live snapshot tests
#
# This tests live snapshots of images on a running QEMU instance, using
# QMP commands.  Both single disk snapshots, and transactional group
# snapshots are performed.
#
# Copyright (C) 2014 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=jcody@redhat.com

seq=`basename $0`
echo "QA output created by $seq"

here=`pwd`
status=1	# failure is the default!

snapshot_virt0="snapshot-v0.qcow2"
snapshot_virt1="snapshot-v1.qcow2"

MAX_SNAPSHOTS=10

_cleanup()
{
    _cleanup_qemu
    for i in $(seq 1 ${MAX_SNAPSHOTS})
    do
        rm -f "${TEST_DIR}/${i}-${snapshot_virt0}"
        rm -f "${TEST_DIR}/${i}-${snapshot_virt1}"
    done
	_cleanup_test_img

}
trap "_cleanup; exit \$status" 0 1 2 3 15

# get standard environment, filters and checks
. ./common.rc
. ./common.filter
. ./common.qemu

_supported_fmt qcow2
_supported_proto file
_supported_os Linux


# ${1}: unique identifier for the snapshot filename
function create_single_snapshot()
{
    cmd="{ 'execute': 'blockdev-snapshot-sync',
                      'arguments': { 'device': 'virtio0',
                                     'snapshot-file':'"${TEST_DIR}/${1}-${snapshot_virt0}"',
                                     'format': 'qcow2' } }"
    _send_qemu_cmd $h "${cmd}" "return"
}

# ${1}: unique identifier for the snapshot filename
function create_group_snapshot()
{
    cmd="{ 'execute': 'transaction', 'arguments':
           {'actions': [
               { 'type': 'blockdev-snapshot-sync', 'data' :
                   { 'device': 'virtio0',
                      'snapshot-file': '"${TEST_DIR}/${1}-${snapshot_virt0}"' } },
               { 'type': 'blockdev-snapshot-sync', 'data' :
                   { 'device': 'virtio1',
                       'snapshot-file': '"${TEST_DIR}/${1}-${snapshot_virt1}"' } } ]
             } }"

    _send_qemu_cmd $h "${cmd}" "return"
}

size=128M

_make_test_img $size
mv "${TEST_IMG}" "${TEST_IMG}.orig"
_make_test_img $size

echo
echo === Running QEMU ===
echo

qemu_comm_method="qmp"
_launch_qemu -drive file="${TEST_IMG}.orig",if=virtio -drive file="${TEST_IMG}",if=virtio
h=$QEMU_HANDLE

echo
echo === Sending capabilities ===
echo

_send_qemu_cmd $h "{ 'execute': 'qmp_capabilities' }" "return"

echo
echo === Create a single snapshot on virtio0 ===
echo

create_single_snapshot 1


echo
echo === Invalid command - missing device and nodename ===
echo

_send_qemu_cmd $h "{ 'execute': 'blockdev-snapshot-sync',
                         'arguments': { 'snapshot-file':'"${TEST_DIR}/1-${snapshot_virt0}"',
                                     'format': 'qcow2' } }" "error"

echo
echo === Invalid command - missing snapshot-file ===
echo

_send_qemu_cmd $h "{ 'execute': 'blockdev-snapshot-sync',
                         'arguments': { 'device': 'virtio0',
                                     'format': 'qcow2' } }" "error"
echo
echo
echo === Create several transactional group snapshots ===
echo

for i in $(seq 2 ${MAX_SNAPSHOTS})
do
    create_group_snapshot ${i}
done

# success, all done
echo "*** done"
rm -f $seq.full
status=0
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