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+#!/bin/bash
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+#
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+# Live snapshot tests
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+#
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+# This tests live snapshots of images on a running QEMU instance, using
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+# QMP commands. Both single disk snapshots, and transactional group
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+# snapshots are performed.
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+#
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+# Copyright (C) 2014 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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+
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+# creator
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+owner=jcody@redhat.com
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+
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+seq=`basename $0`
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+echo "QA output created by $seq"
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+
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+here=`pwd`
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+status=1 # failure is the default!
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+qemu_pid=
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+
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+QMP_IN="${TEST_DIR}/qmp-in-$$"
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+QMP_OUT="${TEST_DIR}/qmp-out-$$"
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+
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+snapshot_virt0="snapshot-v0.qcow2"
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+snapshot_virt1="snapshot-v1.qcow2"
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+
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+MAX_SNAPSHOTS=10
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+
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+_cleanup()
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+{
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+ kill -KILL ${qemu_pid}
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+ wait ${qemu_pid} 2>/dev/null # silent kill
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+
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+ rm -f "${QMP_IN}" "${QMP_OUT}"
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+ for i in $(seq 1 ${MAX_SNAPSHOTS})
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+ do
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+ rm -f "${TEST_DIR}/${i}-${snapshot_virt0}"
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+ rm -f "${TEST_DIR}/${i}-${snapshot_virt1}"
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+ done
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+ _cleanup_test_img
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+
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+}
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+trap "_cleanup; exit \$status" 0 1 2 3 15
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+
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+# get standard environment, filters and checks
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+. ./common.rc
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+. ./common.filter
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+
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+_supported_fmt qcow2
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+_supported_proto file
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+_supported_os Linux
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+
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+# Wait for expected QMP response from QEMU. Will time out
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+# after 10 seconds, which counts as failure.
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+#
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+# $1 is the string to expect
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+#
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+# If $silent is set to anything but an empty string, then
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+# response is not echoed out.
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+function timed_wait_for()
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+{
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+ while read -t 10 resp <&5
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+ do
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+ if [ "${silent}" == "" ]; then
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+ echo "${resp}" | _filter_testdir | _filter_qemu
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+ fi
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+ grep -q "${1}" < <(echo ${resp})
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+ if [ $? -eq 0 ]; then
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+ return
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+ fi
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+ done
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+ echo "Timeout waiting for ${1}"
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+ exit 1 # Timeout means the test failed
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+}
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+
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+# Sends QMP command to QEMU, and waits for the expected response
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+#
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+# ${1}: String of the QMP command to send
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+# ${2}: String that the QEMU response should contain
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+function send_qmp_cmd()
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+{
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+ echo "${1}" >&6
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+ timed_wait_for "${2}"
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+}
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+
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+# ${1}: unique identifier for the snapshot filename
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+function create_single_snapshot()
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+{
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+ cmd="{ 'execute': 'blockdev-snapshot-sync',
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+ 'arguments': { 'device': 'virtio0',
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+ 'snapshot-file':'"${TEST_DIR}/${1}-${snapshot_virt0}"',
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+ 'format': 'qcow2' } }"
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+ send_qmp_cmd "${cmd}" "return"
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+}
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+
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+# ${1}: unique identifier for the snapshot filename
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+function create_group_snapshot()
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+{
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+ cmd="{ 'execute': 'transaction', 'arguments':
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+ {'actions': [
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+ { 'type': 'blockdev-snapshot-sync', 'data' :
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+ { 'device': 'virtio0',
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+ 'snapshot-file': '"${TEST_DIR}/${1}-${snapshot_virt0}"' } },
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+ { 'type': 'blockdev-snapshot-sync', 'data' :
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+ { 'device': 'virtio1',
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+ 'snapshot-file': '"${TEST_DIR}/${1}-${snapshot_virt1}"' } } ]
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+ } }"
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+
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+ send_qmp_cmd "${cmd}" "return"
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+}
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+
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+size=128M
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+
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+mkfifo "${QMP_IN}"
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+mkfifo "${QMP_OUT}"
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+
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+_make_test_img $size
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+mv "${TEST_IMG}" "${TEST_IMG}.orig"
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+_make_test_img $size
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+
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+echo
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+echo === Running QEMU ===
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+echo
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+
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+"${QEMU}" -nographic -monitor none -serial none -qmp stdio\
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+ -drive file="${TEST_IMG}.orig",if=virtio\
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+ -drive file="${TEST_IMG}",if=virtio 2>&1 >"${QMP_OUT}" <"${QMP_IN}"&
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+qemu_pid=$!
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+
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+# redirect fifos to file descriptors, to keep from blocking
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+exec 5<"${QMP_OUT}"
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+exec 6>"${QMP_IN}"
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+
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+# Don't print response, since it has version information in it
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+silent=yes timed_wait_for "capabilities"
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+
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+echo
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+echo === Sending capabilities ===
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+echo
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+
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+send_qmp_cmd "{ 'execute': 'qmp_capabilities' }" "return"
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+
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+echo
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+echo === Create a single snapshot on virtio0 ===
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+echo
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+
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+create_single_snapshot 1
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+
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+
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+echo
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+echo === Invalid command - missing device and nodename ===
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+echo
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+
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+send_qmp_cmd "{ 'execute': 'blockdev-snapshot-sync',
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+ 'arguments': { 'snapshot-file':'"${TEST_DIR}"/1-${snapshot_virt0}',
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+ 'format': 'qcow2' } }" "error"
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+
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+echo
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+echo === Invalid command - missing snapshot-file ===
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+echo
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+
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+send_qmp_cmd "{ 'execute': 'blockdev-snapshot-sync',
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+ 'arguments': { 'device': 'virtio0',
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+ 'format': 'qcow2' } }" "error"
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+echo
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+echo
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+echo === Create several transactional group snapshots ===
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+echo
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+
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+for i in $(seq 2 ${MAX_SNAPSHOTS})
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+do
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+ create_group_snapshot ${i}
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+done
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+
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+# success, all done
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+echo "*** done"
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+rm -f $seq.full
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+status=0
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