block: qemu-iotests 085 - live snapshots tests

This adds tests for live snapshots, both through the single
snapshot command, and the transaction group snapshot command.

The snapshots are done through the QMP interface, using the
following commands for snapshots:

Single snapshot:
{ 'execute': 'blockdev-snapshot-sync', 'arguments':
             { 'device': 'virtio0', 'snapshot-file':'...',
               'format': 'qcow2' } }"

Group snapshot:
{ 'execute': 'transaction', 'arguments':
              {'actions': [
                  { 'type': 'blockdev-snapshot-sync', 'data' :
                    { 'device': 'virtio0', 'snapshot-file': '...' } },
                  { 'type': 'blockdev-snapshot-sync', 'data' :
                    { 'device': 'virtio1', 'snapshot-file': '...' } } ]
             } }

Signed-off-by: Jeff Cody <jcody@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Jeff Cody 2014-02-28 21:08:11 -05:00 committed by Kevin Wolf
parent 2c02f88780
commit 4089f7c6a0
3 changed files with 248 additions and 0 deletions

192
tests/qemu-iotests/085 Executable file
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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 $seq"
here=`pwd`
status=1 # failure is the default!
qemu_pid=
QMP_IN="${TEST_DIR}/qmp-in-$$"
QMP_OUT="${TEST_DIR}/qmp-out-$$"
snapshot_virt0="snapshot-v0.qcow2"
snapshot_virt1="snapshot-v1.qcow2"
MAX_SNAPSHOTS=10
_cleanup()
{
kill -KILL ${qemu_pid}
wait ${qemu_pid} 2>/dev/null # silent kill
rm -f "${QMP_IN}" "${QMP_OUT}"
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
_supported_fmt qcow2
_supported_proto file
_supported_os Linux
# Wait for expected QMP response from QEMU. Will time out
# after 10 seconds, which counts as failure.
#
# $1 is the string to expect
#
# If $silent is set to anything but an empty string, then
# response is not echoed out.
function timed_wait_for()
{
while read -t 10 resp <&5
do
if [ "${silent}" == "" ]; then
echo "${resp}" | _filter_testdir | _filter_qemu
fi
grep -q "${1}" < <(echo ${resp})
if [ $? -eq 0 ]; then
return
fi
done
echo "Timeout waiting for ${1}"
exit 1 # Timeout means the test failed
}
# Sends QMP command to QEMU, and waits for the expected response
#
# ${1}: String of the QMP command to send
# ${2}: String that the QEMU response should contain
function send_qmp_cmd()
{
echo "${1}" >&6
timed_wait_for "${2}"
}
# ${1}: unique identifier for the snapshot filename
function create_single_snapshot()
{
cmd="{ 'execute': 'blockdev-snapshot-sync',
'arguments': { 'device': 'virtio0',
'snapshot-file':'"${TEST_DIR}/${1}-${snapshot_virt0}"',
'format': 'qcow2' } }"
send_qmp_cmd "${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}-${snapshot_virt1}"' } } ]
} }"
send_qmp_cmd "${cmd}" "return"
}
size=128M
mkfifo "${QMP_IN}"
mkfifo "${QMP_OUT}"
_make_test_img $size
mv "${TEST_IMG}" "${TEST_IMG}.orig"
_make_test_img $size
echo
echo === Running QEMU ===
echo
"${QEMU}" -nographic -monitor none -serial none -qmp stdio\
-drive file="${TEST_IMG}.orig",if=virtio\
-drive file="${TEST_IMG}",if=virtio 2>&1 >"${QMP_OUT}" <"${QMP_IN}"&
qemu_pid=$!
# redirect fifos to file descriptors, to keep from blocking
exec 5<"${QMP_OUT}"
exec 6>"${QMP_IN}"
# Don't print response, since it has version information in it
silent=yes timed_wait_for "capabilities"
echo
echo === Sending capabilities ===
echo
send_qmp_cmd "{ 'execute': 'qmp_capabilities' }" "return"
echo
echo === Create a single snapshot on virtio0 ===
echo
create_single_snapshot 1
echo
echo === Invalid command - missing device and nodename ===
echo
send_qmp_cmd "{ 'execute': 'blockdev-snapshot-sync',
'arguments': { 'snapshot-file':'"${TEST_DIR}"/1-${snapshot_virt0}',
'format': 'qcow2' } }" "error"
echo
echo === Invalid command - missing snapshot-file ===
echo
send_qmp_cmd "{ '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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QA output created by 085
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
=== Running QEMU ===
=== Sending capabilities ===
{"return": {}}
=== Create a single snapshot on virtio0 ===
Formatting 'TEST_DIR/1-snapshot-v0.qcow2', fmt=qcow2 size=134217728 backing_file='TEST_DIR/t.qcow2.orig' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
{"return": {}}
=== Invalid command - missing device and nodename ===
{"error": {"class": "GenericError", "desc": "Cannot find device= nor node_name="}}
=== Invalid command - missing snapshot-file ===
{"error": {"class": "GenericError", "desc": "Parameter 'snapshot-file' is missing"}}
=== Create several transactional group snapshots ===
Formatting 'TEST_DIR/2-snapshot-v0.qcow2', fmt=qcow2 size=134217728 backing_file='TEST_DIR/1-snapshot-v0.qcow2' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Formatting 'TEST_DIR/2-snapshot-v1.qcow2', fmt=qcow2 size=134217728 backing_file='TEST_DIR/t.qcow2' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
{"return": {}}
Formatting 'TEST_DIR/3-snapshot-v0.qcow2', fmt=qcow2 size=134217728 backing_file='TEST_DIR/2-snapshot-v0.qcow2' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Formatting 'TEST_DIR/3-snapshot-v1.qcow2', fmt=qcow2 size=134217728 backing_file='TEST_DIR/2-snapshot-v1.qcow2' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
{"return": {}}
Formatting 'TEST_DIR/4-snapshot-v0.qcow2', fmt=qcow2 size=134217728 backing_file='TEST_DIR/3-snapshot-v0.qcow2' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Formatting 'TEST_DIR/4-snapshot-v1.qcow2', fmt=qcow2 size=134217728 backing_file='TEST_DIR/3-snapshot-v1.qcow2' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
{"return": {}}
Formatting 'TEST_DIR/5-snapshot-v0.qcow2', fmt=qcow2 size=134217728 backing_file='TEST_DIR/4-snapshot-v0.qcow2' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Formatting 'TEST_DIR/5-snapshot-v1.qcow2', fmt=qcow2 size=134217728 backing_file='TEST_DIR/4-snapshot-v1.qcow2' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
{"return": {}}
Formatting 'TEST_DIR/6-snapshot-v0.qcow2', fmt=qcow2 size=134217728 backing_file='TEST_DIR/5-snapshot-v0.qcow2' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Formatting 'TEST_DIR/6-snapshot-v1.qcow2', fmt=qcow2 size=134217728 backing_file='TEST_DIR/5-snapshot-v1.qcow2' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
{"return": {}}
Formatting 'TEST_DIR/7-snapshot-v0.qcow2', fmt=qcow2 size=134217728 backing_file='TEST_DIR/6-snapshot-v0.qcow2' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Formatting 'TEST_DIR/7-snapshot-v1.qcow2', fmt=qcow2 size=134217728 backing_file='TEST_DIR/6-snapshot-v1.qcow2' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
{"return": {}}
Formatting 'TEST_DIR/8-snapshot-v0.qcow2', fmt=qcow2 size=134217728 backing_file='TEST_DIR/7-snapshot-v0.qcow2' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Formatting 'TEST_DIR/8-snapshot-v1.qcow2', fmt=qcow2 size=134217728 backing_file='TEST_DIR/7-snapshot-v1.qcow2' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
{"return": {}}
Formatting 'TEST_DIR/9-snapshot-v0.qcow2', fmt=qcow2 size=134217728 backing_file='TEST_DIR/8-snapshot-v0.qcow2' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Formatting 'TEST_DIR/9-snapshot-v1.qcow2', fmt=qcow2 size=134217728 backing_file='TEST_DIR/8-snapshot-v1.qcow2' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
{"return": {}}
Formatting 'TEST_DIR/10-snapshot-v0.qcow2', fmt=qcow2 size=134217728 backing_file='TEST_DIR/9-snapshot-v0.qcow2' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
Formatting 'TEST_DIR/10-snapshot-v1.qcow2', fmt=qcow2 size=134217728 backing_file='TEST_DIR/9-snapshot-v1.qcow2' backing_fmt='qcow2' encryption=off cluster_size=65536 lazy_refcounts=off
{"return": {}}
*** done

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079 rw auto
081 rw auto
082 rw auto quick
085 rw auto quick
086 rw auto quick
087 rw auto quick