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Block layer patches:

Browse source 
- file-posix: Make auto-read-only dynamic
 - Add x-blockdev-reopen QMP command
 - Finalize block-latency-histogram QMP command
 - gluster: Build fixes for newer lib version
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Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches:

- file-posix: Make auto-read-only dynamic
- Add x-blockdev-reopen QMP command
- Finalize block-latency-histogram QMP command
- gluster: Build fixes for newer lib version

# gpg: Signature made Tue 12 Mar 2019 19:30:31 GMT
# gpg:                using RSA key 7F09B272C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream: (28 commits)
  qemu-iotests: Test the x-blockdev-reopen QMP command
  block: Add an 'x-blockdev-reopen' QMP command
  block: Remove the AioContext parameter from bdrv_reopen_multiple()
  block: Add bdrv_reset_options_allowed()
  block: Add a 'mutable_opts' field to BlockDriver
  block: Allow changing the backing file on reopen
  block: Allow omitting the 'backing' option in certain cases
  block: Handle child references in bdrv_reopen_queue()
  block: Add 'keep_old_opts' parameter to bdrv_reopen_queue()
  block: Freeze the backing chain for the duration of the stream job
  block: Freeze the backing chain for the duration of the mirror job
  block: Freeze the backing chain for the duration of the commit job
  block: Allow freezing BdrvChild links
  nvme: fix write zeroes offset and count
  file-posix: Make auto-read-only dynamic
  file-posix: Prepare permission code for fd switching
  file-posix: Lock new fd in raw_reopen_prepare()
  file-posix: Store BDRVRawState.reopen_state during reopen
  file-posix: Factor out raw_reconfigure_getfd()
  file-posix: Fix bdrv_open_flags() for snapshot=on
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2019-03-13 14:44:28 +00:00
commit 36fe770966
26 changed files with 1929 additions and 160 deletions
Download patch file Download diff file Expand all files Collapse all files

7
tests/qemu-iotests/051
View file

@ -356,6 +356,13 @@ $QEMU_IO -c "read -P 0x33 0 4k" "$TEST_IMG" | _filter_qemu_io
# Using snapshot=on with a non-existent TMPDIR
TMPDIR=/nonexistent run_qemu -drive driver=null-co,snapshot=on
# Using snapshot=on together with read-only=on
echo "info block" |
run_qemu -drive file="$TEST_IMG",snapshot=on,read-only=on,if=none,id=$device_id |
_filter_qemu_io |
sed -e 's#"/[^"]*/vl\.[A-Za-z0-9]\{6\}"#SNAPSHOT_PATH#g'
# success, all done
echo "*** done"
rm -f $seq.full

9
tests/qemu-iotests/051.out
View file

@ -458,4 +458,13 @@ read 4096/4096 bytes at offset 0
Testing: -drive driver=null-co,snapshot=on
QEMU_PROG: -drive driver=null-co,snapshot=on: Could not get temporary filename: No such file or directory
Testing: -drive file=TEST_DIR/t.qcow2,snapshot=on,read-only=on,if=none,id=drive0
QEMU X.Y.Z monitor - type 'help' for more information
(qemu) info block
drive0 (NODE_NAME): json:{"backing": {"driver": "qcow2", "file": {"driver": "file", "filename": "TEST_DIR/t.qcow2"}}, "driver": "qcow2", "file": {"driver": "file", "filename": SNAPSHOT_PATH}} (qcow2, read-only)
Removable device: not locked, tray closed
Cache mode: writeback, ignore flushes
Backing file: TEST_DIR/t.qcow2 (chain depth: 1)
(qemu) quit
*** done

9
tests/qemu-iotests/051.pc.out
View file

@ -530,4 +530,13 @@ read 4096/4096 bytes at offset 0
Testing: -drive driver=null-co,snapshot=on
QEMU_PROG: -drive driver=null-co,snapshot=on: Could not get temporary filename: No such file or directory
Testing: -drive file=TEST_DIR/t.qcow2,snapshot=on,read-only=on,if=none,id=drive0
QEMU X.Y.Z monitor - type 'help' for more information
(qemu) info block
drive0 (NODE_NAME): json:{"backing": {"driver": "qcow2", "file": {"driver": "file", "filename": "TEST_DIR/t.qcow2"}}, "driver": "qcow2", "file": {"driver": "file", "filename": SNAPSHOT_PATH}} (qcow2, read-only)
Removable device: not locked, tray closed
Cache mode: writeback, ignore flushes
Backing file: TEST_DIR/t.qcow2 (chain depth: 1)
(qemu) quit
*** done

31
tests/qemu-iotests/232
View file

@ -29,6 +29,7 @@ status=1 # failure is the default!
_cleanup()
{
_cleanup_test_img
rm -f $TEST_IMG.[01234]
}
trap "_cleanup; exit \$status" 0 1 2 3 15
@ -143,6 +144,36 @@ run_qemu_info_block -blockdev driver=file,filename="$TEST_IMG",node-name=node0,a
run_qemu_info_block -blockdev driver=file,filename="$TEST_IMG",node-name=node0,auto-read-only=on
run_qemu_info_block -blockdev driver=file,filename="$TEST_IMG",node-name=node0
echo
echo "=== Try commit to backing file with auto-read-only ==="
echo
TEST_IMG="$TEST_IMG.0" _make_test_img $size
TEST_IMG="$TEST_IMG.1" _make_test_img $size
TEST_IMG="$TEST_IMG.2" _make_test_img $size
TEST_IMG="$TEST_IMG.3" _make_test_img $size
TEST_IMG="$TEST_IMG.4" _make_test_img $size
(cat <<EOF
{"execute":"qmp_capabilities"}
{"execute":"block-commit",
"arguments":{"device":"format-4", "top-node": "format-2", "base-node":"format-0", "job-id":"job0"}}
EOF
sleep 1
echo '{"execute":"quit"}'
) | $QEMU -qmp stdio -nographic -nodefaults \
-blockdev file,node-name=file-0,filename=$TEST_IMG.0,auto-read-only=on \
-blockdev qcow2,node-name=format-0,file=file-0,read-only=on \
-blockdev file,node-name=file-1,filename=$TEST_IMG.1,auto-read-only=on \
-blockdev qcow2,node-name=format-1,file=file-1,read-only=on,backing=format-0 \
-blockdev file,node-name=file-2,filename=$TEST_IMG.2,auto-read-only=on \
-blockdev qcow2,node-name=format-2,file=file-2,read-only=on,backing=format-1 \
-blockdev file,node-name=file-3,filename=$TEST_IMG.3,auto-read-only=on \
-blockdev qcow2,node-name=format-3,file=file-3,read-only=on,backing=format-2 \
-blockdev file,node-name=file-4,filename=$TEST_IMG.4,auto-read-only=on \
-blockdev qcow2,node-name=format-4,file=file-4,read-only=on,backing=format-3 |
_filter_qmp
# success, all done
echo "*** done"
rm -f $seq.full

32
tests/qemu-iotests/232.out
View file

@ -22,12 +22,12 @@ NODE_NAME: TEST_DIR/t.IMGFMT (file, read-only)
NODE_NAME: TEST_DIR/t.IMGFMT (file, read-only)
QEMU_PROG: -drive driver=file,file=TEST_DIR/t.IMGFMT,if=none,read-only=off,auto-read-only=off: Could not open 'TEST_DIR/t.IMGFMT': Permission denied
NODE_NAME: TEST_DIR/t.IMGFMT (file, read-only)
NODE_NAME: TEST_DIR/t.IMGFMT (file, read-only)
NODE_NAME: TEST_DIR/t.IMGFMT (file)
NODE_NAME: TEST_DIR/t.IMGFMT (file)
QEMU_PROG: -drive driver=file,file=TEST_DIR/t.IMGFMT,if=none,auto-read-only=off: Could not open 'TEST_DIR/t.IMGFMT': Permission denied
NODE_NAME: TEST_DIR/t.IMGFMT (file, read-only)
NODE_NAME: TEST_DIR/t.IMGFMT (file, read-only)
NODE_NAME: TEST_DIR/t.IMGFMT (file)
NODE_NAME: TEST_DIR/t.IMGFMT (file)
=== -blockdev with read-write image: read-only/auto-read-only combinations ===
@ -50,10 +50,30 @@ node0: TEST_DIR/t.IMGFMT (file, read-only)
node0: TEST_DIR/t.IMGFMT (file, read-only)
QEMU_PROG: -blockdev driver=file,filename=TEST_DIR/t.IMGFMT,node-name=node0,read-only=off,auto-read-only=off: Could not open 'TEST_DIR/t.IMGFMT': Permission denied
node0: TEST_DIR/t.IMGFMT (file, read-only)
node0: TEST_DIR/t.IMGFMT (file)
QEMU_PROG: -blockdev driver=file,filename=TEST_DIR/t.IMGFMT,node-name=node0,read-only=off: Could not open 'TEST_DIR/t.IMGFMT': Permission denied
QEMU_PROG: -blockdev driver=file,filename=TEST_DIR/t.IMGFMT,node-name=node0,auto-read-only=off: Could not open 'TEST_DIR/t.IMGFMT': Permission denied
node0: TEST_DIR/t.IMGFMT (file, read-only)
node0: TEST_DIR/t.IMGFMT (file)
QEMU_PROG: -blockdev driver=file,filename=TEST_DIR/t.IMGFMT,node-name=node0: Could not open 'TEST_DIR/t.IMGFMT': Permission denied
=== Try commit to backing file with auto-read-only ===
Formatting 'TEST_DIR/t.IMGFMT.0', fmt=IMGFMT size=134217728
Formatting 'TEST_DIR/t.IMGFMT.1', fmt=IMGFMT size=134217728
Formatting 'TEST_DIR/t.IMGFMT.2', fmt=IMGFMT size=134217728
Formatting 'TEST_DIR/t.IMGFMT.3', fmt=IMGFMT size=134217728
Formatting 'TEST_DIR/t.IMGFMT.4', fmt=IMGFMT size=134217728
QMP_VERSION
{"return": {}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "created", "id": "job0"}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "running", "id": "job0"}}
{"return": {}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "waiting", "id": "job0"}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "pending", "id": "job0"}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "BLOCK_JOB_COMPLETED", "data": {"device": "job0", "len": 134217728, "offset": 134217728, "speed": 0, "type": "commit"}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "concluded", "id": "job0"}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "JOB_STATUS_CHANGE", "data": {"status": "null", "id": "job0"}}
{"return": {}}
{"timestamp": {"seconds": TIMESTAMP, "microseconds": TIMESTAMP}, "event": "SHUTDOWN", "data": {"guest": false, "reason": "host-qmp-quit"}}
*** done

991
tests/qemu-iotests/245 Normal file
View file

@ -0,0 +1,991 @@
#!/usr/bin/env python
#
# Test cases for the QMP 'x-blockdev-reopen' command
#
# Copyright (C) 2018-2019 Igalia, S.L.
# Author: Alberto Garcia <berto@igalia.com>
#
# 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/>.
#
import os
import re
import iotests
import copy
import json
from iotests import qemu_img, qemu_io
hd_path = [
os.path.join(iotests.test_dir, 'hd0.img'),
os.path.join(iotests.test_dir, 'hd1.img'),
os.path.join(iotests.test_dir, 'hd2.img')
]
def hd_opts(idx):
return {'driver': iotests.imgfmt,
'node-name': 'hd%d' % idx,
'file': {'driver': 'file',
'node-name': 'hd%d-file' % idx,
'filename': hd_path[idx] } }
class TestBlockdevReopen(iotests.QMPTestCase):
total_io_cmds = 0
def setUp(self):
qemu_img('create', '-f', iotests.imgfmt, hd_path[0], '3M')
qemu_img('create', '-f', iotests.imgfmt, '-b', hd_path[0], hd_path[1])
qemu_img('create', '-f', iotests.imgfmt, hd_path[2], '3M')
qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0xa0 0 1M', hd_path[0])
qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0xa1 1M 1M', hd_path[1])
qemu_io('-f', iotests.imgfmt, '-c', 'write -P 0xa2 2M 1M', hd_path[2])
self.vm = iotests.VM()
self.vm.launch()
def tearDown(self):
self.vm.shutdown()
self.check_qemu_io_errors()
os.remove(hd_path[0])
os.remove(hd_path[1])
os.remove(hd_path[2])
# The output of qemu-io is not returned by vm.hmp_qemu_io() but
# it's stored in the log and can only be read when the VM has been
# shut down. This function runs qemu-io and keeps track of the
# number of times it's been called.
def run_qemu_io(self, img, cmd):
result = self.vm.hmp_qemu_io(img, cmd)
self.assert_qmp(result, 'return', '')
self.total_io_cmds += 1
# Once the VM is shut down we can parse the log and see if qemu-io
# ran without errors.
def check_qemu_io_errors(self):
self.assertFalse(self.vm.is_running())
found = 0
log = self.vm.get_log()
for line in log.split("\n"):
if line.startswith("Pattern verification failed"):
raise Exception("%s (command #%d)" % (line, found))
if re.match("read .*/.* bytes at offset", line):
found += 1
self.assertEqual(found, self.total_io_cmds,
"Expected output of %d qemu-io commands, found %d" %
(found, self.total_io_cmds))
# Run x-blockdev-reopen with 'opts' but applying 'newopts'
# on top of it. The original 'opts' dict is unmodified
def reopen(self, opts, newopts = {}, errmsg = None):
opts = copy.deepcopy(opts)
# Apply the changes from 'newopts' on top of 'opts'
for key in newopts:
value = newopts[key]
# If key has the form "foo.bar" then we need to do
# opts["foo"]["bar"] = value, not opts["foo.bar"] = value
subdict = opts
while key.find('.') != -1:
[prefix, key] = key.split('.', 1)
subdict = opts[prefix]
subdict[key] = value
result = self.vm.qmp('x-blockdev-reopen', conv_keys = False, **opts)
if errmsg:
self.assert_qmp(result, 'error/class', 'GenericError')
self.assert_qmp(result, 'error/desc', errmsg)
else:
self.assert_qmp(result, 'return', {})
# Run query-named-block-nodes and return the specified entry
def get_node(self, node_name):
result = self.vm.qmp('query-named-block-nodes')
for node in result['return']:
if node['node-name'] == node_name:
return node
return None
# Run 'query-named-block-nodes' and compare its output with the
# value passed by the user in 'graph'
def check_node_graph(self, graph):
result = self.vm.qmp('query-named-block-nodes')
self.assertEqual(json.dumps(graph, sort_keys=True),
json.dumps(result, sort_keys=True))
# This test opens one single disk image (without backing files)
# and tries to reopen it with illegal / incorrect parameters.
def test_incorrect_parameters_single_file(self):
# Open 'hd0' only (no backing files)
opts = hd_opts(0)
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
original_graph = self.vm.qmp('query-named-block-nodes')
# We can reopen the image passing the same options
self.reopen(opts)
# We can also reopen passing a child reference in 'file'
self.reopen(opts, {'file': 'hd0-file'})
# We cannot change any of these
self.reopen(opts, {'node-name': 'not-found'}, "Cannot find node named 'not-found'")
self.reopen(opts, {'node-name': ''}, "Cannot find node named ''")
self.reopen(opts, {'node-name': None}, "Invalid parameter type for 'node-name', expected: string")
self.reopen(opts, {'driver': 'raw'}, "Cannot change the option 'driver'")
self.reopen(opts, {'driver': ''}, "Invalid parameter ''")
self.reopen(opts, {'driver': None}, "Invalid parameter type for 'driver', expected: string")
self.reopen(opts, {'file': 'not-found'}, "Cannot change the option 'file'")
self.reopen(opts, {'file': ''}, "Cannot change the option 'file'")
self.reopen(opts, {'file': None}, "Invalid parameter type for 'file', expected: BlockdevRef")
self.reopen(opts, {'file.node-name': 'newname'}, "Cannot change the option 'node-name'")
self.reopen(opts, {'file.driver': 'host_device'}, "Cannot change the option 'driver'")
self.reopen(opts, {'file.filename': hd_path[1]}, "Cannot change the option 'filename'")
self.reopen(opts, {'file.aio': 'native'}, "Cannot change the option 'aio'")
self.reopen(opts, {'file.locking': 'off'}, "Cannot change the option 'locking'")
self.reopen(opts, {'file.filename': None}, "Invalid parameter type for 'file.filename', expected: string")
# node-name is optional in BlockdevOptions, but x-blockdev-reopen needs it
del opts['node-name']
self.reopen(opts, {}, "Node name not specified")
# Check that nothing has changed
self.check_node_graph(original_graph)
# Remove the node
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0')
self.assert_qmp(result, 'return', {})
# This test opens an image with a backing file and tries to reopen
# it with illegal / incorrect parameters.
def test_incorrect_parameters_backing_file(self):
# Open hd1 omitting the backing options (hd0 will be opened
# with the default options)
opts = hd_opts(1)
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
original_graph = self.vm.qmp('query-named-block-nodes')
# We can't reopen the image passing the same options, 'backing' is mandatory
self.reopen(opts, {}, "backing is missing for 'hd1'")
# Everything works if we pass 'backing' using the existing node name
for node in original_graph['return']:
if node['drv'] == iotests.imgfmt and node['file'] == hd_path[0]:
backing_node_name = node['node-name']
self.reopen(opts, {'backing': backing_node_name})
# We can't use a non-existing or empty (non-NULL) node as the backing image
self.reopen(opts, {'backing': 'not-found'}, "Cannot find device= nor node_name=not-found")
self.reopen(opts, {'backing': ''}, "Cannot find device= nor node_name=")
# We can reopen the image just fine if we specify the backing options
opts['backing'] = {'driver': iotests.imgfmt,
'file': {'driver': 'file',
'filename': hd_path[0]}}
self.reopen(opts)
# We cannot change any of these options
self.reopen(opts, {'backing.node-name': 'newname'}, "Cannot change the option 'node-name'")
self.reopen(opts, {'backing.driver': 'raw'}, "Cannot change the option 'driver'")
self.reopen(opts, {'backing.file.node-name': 'newname'}, "Cannot change the option 'node-name'")
self.reopen(opts, {'backing.file.driver': 'host_device'}, "Cannot change the option 'driver'")
# Check that nothing has changed since the beginning
self.check_node_graph(original_graph)
# Remove the node
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd1')
self.assert_qmp(result, 'return', {})
# Reopen an image several times changing some of its options
def test_reopen(self):
# Open the hd1 image passing all backing options
opts = hd_opts(1)
opts['backing'] = hd_opts(0)
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
original_graph = self.vm.qmp('query-named-block-nodes')
# We can reopen the image passing the same options
self.reopen(opts)
# Reopen in read-only mode
self.assert_qmp(self.get_node('hd1'), 'ro', False)
self.reopen(opts, {'read-only': True})
self.assert_qmp(self.get_node('hd1'), 'ro', True)
self.reopen(opts)
self.assert_qmp(self.get_node('hd1'), 'ro', False)
# Change the cache options
self.assert_qmp(self.get_node('hd1'), 'cache/writeback', True)
self.assert_qmp(self.get_node('hd1'), 'cache/direct', False)
self.assert_qmp(self.get_node('hd1'), 'cache/no-flush', False)
self.reopen(opts, {'cache': { 'direct': True, 'no-flush': True }})
self.assert_qmp(self.get_node('hd1'), 'cache/writeback', True)
self.assert_qmp(self.get_node('hd1'), 'cache/direct', True)
self.assert_qmp(self.get_node('hd1'), 'cache/no-flush', True)
# Reopen again with the original options
self.reopen(opts)
self.assert_qmp(self.get_node('hd1'), 'cache/writeback', True)
self.assert_qmp(self.get_node('hd1'), 'cache/direct', False)
self.assert_qmp(self.get_node('hd1'), 'cache/no-flush', False)
# Change 'detect-zeroes' and 'discard'
self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'off')
self.reopen(opts, {'detect-zeroes': 'on'})
self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'on')
self.reopen(opts, {'detect-zeroes': 'unmap'},
"setting detect-zeroes to unmap is not allowed " +
"without setting discard operation to unmap")
self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'on')
self.reopen(opts, {'detect-zeroes': 'unmap', 'discard': 'unmap'})
self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'unmap')
self.reopen(opts)
self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'off')
# Changing 'force-share' is currently not supported
self.reopen(opts, {'force-share': True}, "Cannot change the option 'force-share'")
# Change some qcow2-specific options
# No way to test for success other than checking the return message
if iotests.imgfmt == 'qcow2':
self.reopen(opts, {'l2-cache-entry-size': 128 * 1024},
"L2 cache entry size must be a power of two "+
"between 512 and the cluster size (65536)")
self.reopen(opts, {'l2-cache-size': 1024 * 1024,
'cache-size': 512 * 1024},
"l2-cache-size may not exceed cache-size")
self.reopen(opts, {'l2-cache-size': 4 * 1024 * 1024,
'refcount-cache-size': 4 * 1024 * 1024,
'l2-cache-entry-size': 32 * 1024})
self.reopen(opts, {'pass-discard-request': True})
# Check that nothing has changed since the beginning
# (from the parameters that we can check)
self.check_node_graph(original_graph)
# Check that the node names (other than the top-level one) are optional
del opts['file']['node-name']
del opts['backing']['node-name']
del opts['backing']['file']['node-name']
self.reopen(opts)
self.check_node_graph(original_graph)
# Reopen setting backing = null, this removes the backing image from the chain
self.reopen(opts, {'backing': None})
self.assert_qmp_absent(self.get_node('hd1'), 'image/backing-image')
# Open the 'hd0' image
result = self.vm.qmp('blockdev-add', conv_keys = False, **hd_opts(0))
self.assert_qmp(result, 'return', {})
# Reopen the hd1 image setting 'hd0' as its backing image
self.reopen(opts, {'backing': 'hd0'})
self.assert_qmp(self.get_node('hd1'), 'image/backing-image/filename', hd_path[0])
# Check that nothing has changed since the beginning
self.reopen(hd_opts(0), {'read-only': True})
self.check_node_graph(original_graph)
# The backing file (hd0) is now a reference, we cannot change backing.* anymore
self.reopen(opts, {}, "Cannot change the option 'backing.driver'")
# We can't remove 'hd0' while it's a backing image of 'hd1'
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0')
self.assert_qmp(result, 'error/class', 'GenericError')
self.assert_qmp(result, 'error/desc', "Node 'hd0' is busy: node is used as backing hd of 'hd1'")
# But we can remove both nodes if done in the proper order
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd1')
self.assert_qmp(result, 'return', {})
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0')
self.assert_qmp(result, 'return', {})
# Reopen a raw image and see the effect of changing the 'offset' option
def test_reopen_raw(self):
opts = {'driver': 'raw', 'node-name': 'hd0',
'file': { 'driver': 'file',
'filename': hd_path[0],
'node-name': 'hd0-file' } }
# First we create a 2MB raw file, and fill each half with a
# different value
qemu_img('create', '-f', 'raw', hd_path[0], '2M')
qemu_io('-f', 'raw', '-c', 'write -P 0xa0 0 1M', hd_path[0])
qemu_io('-f', 'raw', '-c', 'write -P 0xa1 1M 1M', hd_path[0])
# Open the raw file with QEMU
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
# Read 1MB from offset 0
self.run_qemu_io("hd0", "read -P 0xa0 0 1M")
# Reopen the image with a 1MB offset.
# Now the results are different
self.reopen(opts, {'offset': 1024*1024})
self.run_qemu_io("hd0", "read -P 0xa1 0 1M")
# Reopen again with the original options.
# We get the original results again
self.reopen(opts)
self.run_qemu_io("hd0", "read -P 0xa0 0 1M")
# Remove the block device
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0')
self.assert_qmp(result, 'return', {})
# Omitting an option should reset it to the default value, but if
# an option cannot be changed it shouldn't be possible to reset it
# to its default value either
def test_reset_default_values(self):
opts = {'driver': 'qcow2', 'node-name': 'hd0',
'file': { 'driver': 'file',
'filename': hd_path[0],
'x-check-cache-dropped': True, # This one can be changed
'locking': 'off', # This one can NOT be changed
'node-name': 'hd0-file' } }
# Open the file with QEMU
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
# file.x-check-cache-dropped can be changed...
self.reopen(opts, { 'file.x-check-cache-dropped': False })
# ...and dropped completely (resetting to the default value)
del opts['file']['x-check-cache-dropped']
self.reopen(opts)
# file.locking cannot be changed nor reset to the default value
self.reopen(opts, { 'file.locking': 'on' }, "Cannot change the option 'locking'")
del opts['file']['locking']
self.reopen(opts, {}, "Option 'locking' cannot be reset to its default value")
# But we can reopen it if we maintain its previous value
self.reopen(opts, { 'file.locking': 'off' })
# Remove the block device
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0')
self.assert_qmp(result, 'return', {})
# This test modifies the node graph a few times by changing the
# 'backing' option on reopen and verifies that the guest data that
# is read afterwards is consistent with the graph changes.
def test_io_with_graph_changes(self):
opts = []
# Open hd0, hd1 and hd2 without any backing image
for i in range(3):
opts.append(hd_opts(i))
opts[i]['backing'] = None
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts[i])
self.assert_qmp(result, 'return', {})
# hd0
self.run_qemu_io("hd0", "read -P 0xa0 0 1M")
self.run_qemu_io("hd0", "read -P 0 1M 1M")
self.run_qemu_io("hd0", "read -P 0 2M 1M")
# hd1 <- hd0
self.reopen(opts[0], {'backing': 'hd1'})
self.run_qemu_io("hd0", "read -P 0xa0 0 1M")
self.run_qemu_io("hd0", "read -P 0xa1 1M 1M")
self.run_qemu_io("hd0", "read -P 0 2M 1M")
# hd1 <- hd0 , hd1 <- hd2
self.reopen(opts[2], {'backing': 'hd1'})
self.run_qemu_io("hd2", "read -P 0 0 1M")
self.run_qemu_io("hd2", "read -P 0xa1 1M 1M")
self.run_qemu_io("hd2", "read -P 0xa2 2M 1M")
# hd1 <- hd2 <- hd0
self.reopen(opts[0], {'backing': 'hd2'})
self.run_qemu_io("hd0", "read -P 0xa0 0 1M")
self.run_qemu_io("hd0", "read -P 0xa1 1M 1M")
self.run_qemu_io("hd0", "read -P 0xa2 2M 1M")
# hd2 <- hd0
self.reopen(opts[2], {'backing': None})
self.run_qemu_io("hd0", "read -P 0xa0 0 1M")
self.run_qemu_io("hd0", "read -P 0 1M 1M")
self.run_qemu_io("hd0", "read -P 0xa2 2M 1M")
# hd2 <- hd1 <- hd0
self.reopen(opts[1], {'backing': 'hd2'})
self.reopen(opts[0], {'backing': 'hd1'})
self.run_qemu_io("hd0", "read -P 0xa0 0 1M")
self.run_qemu_io("hd0", "read -P 0xa1 1M 1M")
self.run_qemu_io("hd0", "read -P 0xa2 2M 1M")
# Illegal operation: hd2 is a child of hd1
self.reopen(opts[2], {'backing': 'hd1'},
"Making 'hd1' a backing file of 'hd2' would create a cycle")
# hd2 <- hd0, hd2 <- hd1
self.reopen(opts[0], {'backing': 'hd2'})
self.run_qemu_io("hd1", "read -P 0 0 1M")
self.run_qemu_io("hd1", "read -P 0xa1 1M 1M")
self.run_qemu_io("hd1", "read -P 0xa2 2M 1M")
# More illegal operations
self.reopen(opts[2], {'backing': 'hd1'},
"Making 'hd1' a backing file of 'hd2' would create a cycle")
self.reopen(opts[2], {'file': 'hd0-file'}, "Cannot change the option 'file'")
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd2')
self.assert_qmp(result, 'error/class', 'GenericError')
self.assert_qmp(result, 'error/desc', "Node 'hd2' is busy: node is used as backing hd of 'hd0'")
# hd1 doesn't have a backing file now
self.reopen(opts[1], {'backing': None})
self.run_qemu_io("hd1", "read -P 0 0 1M")
self.run_qemu_io("hd1", "read -P 0xa1 1M 1M")
self.run_qemu_io("hd1", "read -P 0 2M 1M")
# We can't remove the 'backing' option if the image has a
# default backing file
del opts[1]['backing']
self.reopen(opts[1], {}, "backing is missing for 'hd1'")
self.run_qemu_io("hd1", "read -P 0 0 1M")
self.run_qemu_io("hd1", "read -P 0xa1 1M 1M")
self.run_qemu_io("hd1", "read -P 0 2M 1M")
# This test verifies that we can't change the children of a block
# device during a reopen operation in a way that would create
# cycles in the node graph
def test_graph_cycles(self):
opts = []
# Open all three images without backing file
for i in range(3):
opts.append(hd_opts(i))
opts[i]['backing'] = None
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts[i])
self.assert_qmp(result, 'return', {})
# hd1 <- hd0, hd1 <- hd2
self.reopen(opts[0], {'backing': 'hd1'})
self.reopen(opts[2], {'backing': 'hd1'})
# Illegal: hd2 is backed by hd1
self.reopen(opts[1], {'backing': 'hd2'},
"Making 'hd2' a backing file of 'hd1' would create a cycle")
# hd1 <- hd0 <- hd2
self.reopen(opts[2], {'backing': 'hd0'})
# Illegal: hd2 is backed by hd0, which is backed by hd1
self.reopen(opts[1], {'backing': 'hd2'},
"Making 'hd2' a backing file of 'hd1' would create a cycle")
# Illegal: hd1 cannot point to itself
self.reopen(opts[1], {'backing': 'hd1'},
"Making 'hd1' a backing file of 'hd1' would create a cycle")
# Remove all backing files
self.reopen(opts[0])
self.reopen(opts[2])
##########################################
# Add a blkverify node using hd0 and hd1 #
##########################################
bvopts = {'driver': 'blkverify',
'node-name': 'bv',
'test': 'hd0',
'raw': 'hd1'}
result = self.vm.qmp('blockdev-add', conv_keys = False, **bvopts)
self.assert_qmp(result, 'return', {})
# blkverify doesn't currently allow reopening. TODO: implement this
self.reopen(bvopts, {}, "Block format 'blkverify' used by node 'bv'" +
" does not support reopening files")
# Illegal: hd0 is a child of the blkverify node
self.reopen(opts[0], {'backing': 'bv'},
"Making 'bv' a backing file of 'hd0' would create a cycle")
# Delete the blkverify node
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'bv')
self.assert_qmp(result, 'return', {})
# Misc reopen tests with different block drivers
def test_misc_drivers(self):
####################
###### quorum ######
####################
for i in range(3):
opts = hd_opts(i)
# Open all three images without backing file
opts['backing'] = None
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
opts = {'driver': 'quorum',
'node-name': 'quorum0',
'children': ['hd0', 'hd1', 'hd2'],
'vote-threshold': 2}
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
# Quorum doesn't currently allow reopening. TODO: implement this
self.reopen(opts, {}, "Block format 'quorum' used by node 'quorum0'" +
" does not support reopening files")
# You can't make quorum0 a backing file of hd0:
# hd0 is already a child of quorum0.
self.reopen(hd_opts(0), {'backing': 'quorum0'},
"Making 'quorum0' a backing file of 'hd0' would create a cycle")
# Delete quorum0
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'quorum0')
self.assert_qmp(result, 'return', {})
# Delete hd0, hd1 and hd2
for i in range(3):
result = self.vm.qmp('blockdev-del', conv_keys = True,
node_name = 'hd%d' % i)
self.assert_qmp(result, 'return', {})
######################
###### blkdebug ######
######################
opts = {'driver': 'blkdebug',
'node-name': 'bd',
'config': '/dev/null',
'image': hd_opts(0)}
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
# blkdebug allows reopening if we keep the same options
self.reopen(opts)
# but it currently does not allow changes
self.reopen(opts, {'image': 'hd1'}, "Cannot change the option 'image'")
self.reopen(opts, {'align': 33554432}, "Cannot change the option 'align'")
self.reopen(opts, {'config': '/non/existent'}, "Cannot change the option 'config'")
del opts['config']
self.reopen(opts, {}, "Option 'config' cannot be reset to its default value")
# Delete the blkdebug node
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'bd')
self.assert_qmp(result, 'return', {})
##################
###### null ######
##################
opts = {'driver': 'null-aio', 'node-name': 'root', 'size': 1024}
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
# 1 << 30 is the default value, but we cannot change it explicitly
self.reopen(opts, {'size': (1 << 30)}, "Cannot change the option 'size'")
# We cannot change 'size' back to its default value either
del opts['size']
self.reopen(opts, {}, "Option 'size' cannot be reset to its default value")
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'root')
self.assert_qmp(result, 'return', {})
##################
###### file ######
##################
opts = hd_opts(0)
opts['file']['locking'] = 'on'
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
# 'locking' cannot be changed
del opts['file']['locking']
self.reopen(opts, {'file.locking': 'on'})
self.reopen(opts, {'file.locking': 'off'}, "Cannot change the option 'locking'")
self.reopen(opts, {}, "Option 'locking' cannot be reset to its default value")
# Trying to reopen the 'file' node directly does not make a difference
opts = opts['file']
self.reopen(opts, {'locking': 'on'})
self.reopen(opts, {'locking': 'off'}, "Cannot change the option 'locking'")
self.reopen(opts, {}, "Option 'locking' cannot be reset to its default value")
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0')
self.assert_qmp(result, 'return', {})
######################
###### throttle ######
######################
opts = { 'qom-type': 'throttle-group', 'id': 'group0',
'props': { 'limits': { 'iops-total': 1000 } } }
result = self.vm.qmp('object-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
opts = { 'qom-type': 'throttle-group', 'id': 'group1',
'props': { 'limits': { 'iops-total': 2000 } } }
result = self.vm.qmp('object-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
# Add a throttle filter with group = group0
opts = { 'driver': 'throttle', 'node-name': 'throttle0',
'throttle-group': 'group0', 'file': hd_opts(0) }
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
# We can reopen it if we keep the same options
self.reopen(opts)
# We can also reopen if 'file' is a reference to the child
self.reopen(opts, {'file': 'hd0'})
# This is illegal
self.reopen(opts, {'throttle-group': 'notfound'}, "Throttle group 'notfound' does not exist")
# But it's possible to change the group to group1
self.reopen(opts, {'throttle-group': 'group1'})
# Now group1 is in use, it cannot be deleted
result = self.vm.qmp('object-del', id = 'group1')
self.assert_qmp(result, 'error/class', 'GenericError')
self.assert_qmp(result, 'error/desc', "object 'group1' is in use, can not be deleted")
# Default options, this switches the group back to group0
self.reopen(opts)
# So now we cannot delete group0
result = self.vm.qmp('object-del', id = 'group0')
self.assert_qmp(result, 'error/class', 'GenericError')
self.assert_qmp(result, 'error/desc', "object 'group0' is in use, can not be deleted")
# But group1 is free this time, and it can be deleted
result = self.vm.qmp('object-del', id = 'group1')
self.assert_qmp(result, 'return', {})
# Let's delete the filter node
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'throttle0')
self.assert_qmp(result, 'return', {})
# And we can finally get rid of group0
result = self.vm.qmp('object-del', id = 'group0')
self.assert_qmp(result, 'return', {})
# If an image has a backing file then the 'backing' option must be
# passed on reopen. We don't allow leaving the option out in this
# case because it's unclear what the correct semantics would be.
def test_missing_backing_options_1(self):
# hd2
opts = hd_opts(2)
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
# hd0
opts = hd_opts(0)
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
# hd0 has no backing file: we can omit the 'backing' option
self.reopen(opts)
# hd2 <- hd0
self.reopen(opts, {'backing': 'hd2'})
# hd0 has a backing file: we must set the 'backing' option
self.reopen(opts, {}, "backing is missing for 'hd0'")
# hd2 can't be removed because it's the backing file of hd0
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd2')
self.assert_qmp(result, 'error/class', 'GenericError')
self.assert_qmp(result, 'error/desc', "Node 'hd2' is busy: node is used as backing hd of 'hd0'")
# Detach hd2 from hd0.
self.reopen(opts, {'backing': None})
self.reopen(opts, {}, "backing is missing for 'hd0'")
# Remove both hd0 and hd2
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0')
self.assert_qmp(result, 'return', {})
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd2')
self.assert_qmp(result, 'return', {})
# If an image has default backing file (as part of its metadata)
# then the 'backing' option must be passed on reopen. We don't
# allow leaving the option out in this case because it's unclear
# what the correct semantics would be.
def test_missing_backing_options_2(self):
# hd0 <- hd1
# (hd0 is hd1's default backing file)
opts = hd_opts(1)
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
# hd1 has a backing file: we can't omit the 'backing' option
self.reopen(opts, {}, "backing is missing for 'hd1'")
# Let's detach the backing file
self.reopen(opts, {'backing': None})
# No backing file attached to hd1 now, but we still can't omit the 'backing' option
self.reopen(opts, {}, "backing is missing for 'hd1'")
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd1')
self.assert_qmp(result, 'return', {})
# Test that making 'backing' a reference to an existing child
# keeps its current options
def test_backing_reference(self):
# hd2 <- hd1 <- hd0
opts = hd_opts(0)
opts['backing'] = hd_opts(1)
opts['backing']['backing'] = hd_opts(2)
# Enable 'detect-zeroes' on all three nodes
opts['detect-zeroes'] = 'on'
opts['backing']['detect-zeroes'] = 'on'
opts['backing']['backing']['detect-zeroes'] = 'on'
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
# Reopen the chain passing the minimum amount of required options.
# By making 'backing' a reference to hd1 (instead of a sub-dict)
# we tell QEMU to keep its current set of options.
opts = {'driver': iotests.imgfmt,
'node-name': 'hd0',
'file': 'hd0-file',
'backing': 'hd1' }
self.reopen(opts)
# This has reset 'detect-zeroes' on hd0, but not on hd1 and hd2.
self.assert_qmp(self.get_node('hd0'), 'detect_zeroes', 'off')
self.assert_qmp(self.get_node('hd1'), 'detect_zeroes', 'on')
self.assert_qmp(self.get_node('hd2'), 'detect_zeroes', 'on')
# Test what happens if the graph changes due to other operations
# such as block-stream
def test_block_stream_1(self):
# hd1 <- hd0
opts = hd_opts(0)
opts['backing'] = hd_opts(1)
opts['backing']['backing'] = None
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
# Stream hd1 into hd0 and wait until it's done
result = self.vm.qmp('block-stream', conv_keys = True, job_id = 'stream0', device = 'hd0')
self.assert_qmp(result, 'return', {})
self.wait_until_completed(drive = 'stream0')
# Now we have only hd0
self.assertEqual(self.get_node('hd1'), None)
# We have backing.* options but there's no backing file anymore
self.reopen(opts, {}, "Cannot change the option 'backing.driver'")
# If we remove the 'backing' option then we can reopen hd0 just fine
del opts['backing']
self.reopen(opts)
# We can also reopen hd0 if we set 'backing' to null
self.reopen(opts, {'backing': None})
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0')
self.assert_qmp(result, 'return', {})
# Another block_stream test
def test_block_stream_2(self):
# hd2 <- hd1 <- hd0
opts = hd_opts(0)
opts['backing'] = hd_opts(1)
opts['backing']['backing'] = hd_opts(2)
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
# Stream hd1 into hd0 and wait until it's done
result = self.vm.qmp('block-stream', conv_keys = True, job_id = 'stream0',
device = 'hd0', base_node = 'hd2')
self.assert_qmp(result, 'return', {})
self.wait_until_completed(drive = 'stream0')
# The chain is hd2 <- hd0 now. hd1 is missing
self.assertEqual(self.get_node('hd1'), None)
# The backing options in the dict were meant for hd1, but we cannot
# use them with hd2 because hd1 had a backing file while hd2 does not.
self.reopen(opts, {}, "Cannot change the option 'backing.driver'")
# If we remove hd1's options from the dict then things work fine
opts['backing'] = opts['backing']['backing']
self.reopen(opts)
# We can also reopen hd0 if we use a reference to the backing file
self.reopen(opts, {'backing': 'hd2'})
# But we cannot leave the option out
del opts['backing']
self.reopen(opts, {}, "backing is missing for 'hd0'")
# Now we can delete hd0 (and hd2)
result = self.vm.qmp('blockdev-del', conv_keys = True, node_name = 'hd0')
self.assert_qmp(result, 'return', {})
self.assertEqual(self.get_node('hd2'), None)
# Reopen the chain during a block-stream job (from hd1 to hd0)
def test_block_stream_3(self):
# hd2 <- hd1 <- hd0
opts = hd_opts(0)
opts['backing'] = hd_opts(1)
opts['backing']['backing'] = hd_opts(2)
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
# hd2 <- hd0
result = self.vm.qmp('block-stream', conv_keys = True, job_id = 'stream0',
device = 'hd0', base_node = 'hd2', speed = 512 * 1024)
self.assert_qmp(result, 'return', {})
# We can't remove hd2 while the stream job is ongoing
opts['backing']['backing'] = None
self.reopen(opts, {}, "Cannot change 'backing' link from 'hd1' to 'hd2'")
# We can't remove hd1 while the stream job is ongoing
opts['backing'] = None
self.reopen(opts, {}, "Cannot change 'backing' link from 'hd0' to 'hd1'")
self.wait_until_completed(drive = 'stream0')
# Reopen the chain during a block-stream job (from hd2 to hd1)
def test_block_stream_4(self):
# hd2 <- hd1 <- hd0
opts = hd_opts(0)
opts['backing'] = hd_opts(1)
opts['backing']['backing'] = hd_opts(2)
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
# hd1 <- hd0
result = self.vm.qmp('block-stream', conv_keys = True, job_id = 'stream0',
device = 'hd1', speed = 512 * 1024)
self.assert_qmp(result, 'return', {})
# We can't reopen with the original options because that would
# make hd1 read-only and block-stream requires it to be read-write
self.reopen(opts, {}, "Can't set node 'hd1' to r/o with copy-on-read enabled")
# We can't remove hd2 while the stream job is ongoing
opts['backing']['backing'] = None
self.reopen(opts, {'backing.read-only': False}, "Cannot change 'backing' link from 'hd1' to 'hd2'")
# We can detach hd1 from hd0 because it doesn't affect the stream job
opts['backing'] = None
self.reopen(opts)
self.wait_until_completed(drive = 'stream0')
# Reopen the chain during a block-commit job (from hd0 to hd2)
def test_block_commit_1(self):
# hd2 <- hd1 <- hd0
opts = hd_opts(0)
opts['backing'] = hd_opts(1)
opts['backing']['backing'] = hd_opts(2)
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
result = self.vm.qmp('block-commit', conv_keys = True, job_id = 'commit0',
device = 'hd0', speed = 1024 * 1024)
self.assert_qmp(result, 'return', {})
# We can't remove hd2 while the commit job is ongoing
opts['backing']['backing'] = None
self.reopen(opts, {}, "Cannot change 'backing' link from 'hd1' to 'hd2'")
# We can't remove hd1 while the commit job is ongoing
opts['backing'] = None
self.reopen(opts, {}, "Cannot change 'backing' link from 'hd0' to 'hd1'")
event = self.vm.event_wait(name='BLOCK_JOB_READY')
self.assert_qmp(event, 'data/device', 'commit0')
self.assert_qmp(event, 'data/type', 'commit')
self.assert_qmp_absent(event, 'data/error')
result = self.vm.qmp('block-job-complete', device='commit0')
self.assert_qmp(result, 'return', {})
self.wait_until_completed(drive = 'commit0')
# Reopen the chain during a block-commit job (from hd1 to hd2)
def test_block_commit_2(self):
# hd2 <- hd1 <- hd0
opts = hd_opts(0)
opts['backing'] = hd_opts(1)
opts['backing']['backing'] = hd_opts(2)
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
result = self.vm.qmp('block-commit', conv_keys = True, job_id = 'commit0',
device = 'hd0', top_node = 'hd1', speed = 1024 * 1024)
self.assert_qmp(result, 'return', {})
# We can't remove hd2 while the commit job is ongoing
opts['backing']['backing'] = None
self.reopen(opts, {}, "Cannot change the option 'backing.driver'")
# We can't remove hd1 while the commit job is ongoing
opts['backing'] = None
self.reopen(opts, {}, "Cannot change backing link if 'hd0' has an implicit backing file")
# hd2 <- hd0
self.wait_until_completed(drive = 'commit0')
self.assert_qmp(self.get_node('hd0'), 'ro', False)
self.assertEqual(self.get_node('hd1'), None)
self.assert_qmp(self.get_node('hd2'), 'ro', True)
# We don't allow setting a backing file that uses a different AioContext
def test_iothreads(self):
opts = hd_opts(0)
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts)
self.assert_qmp(result, 'return', {})
opts2 = hd_opts(2)
result = self.vm.qmp('blockdev-add', conv_keys = False, **opts2)
self.assert_qmp(result, 'return', {})
result = self.vm.qmp('object-add', qom_type='iothread', id='iothread0')
self.assert_qmp(result, 'return', {})
result = self.vm.qmp('object-add', qom_type='iothread', id='iothread1')
self.assert_qmp(result, 'return', {})
result = self.vm.qmp('x-blockdev-set-iothread', node_name='hd0', iothread='iothread0')
self.assert_qmp(result, 'return', {})
self.reopen(opts, {'backing': 'hd2'}, "Cannot use a new backing file with a different AioContext")
result = self.vm.qmp('x-blockdev-set-iothread', node_name='hd2', iothread='iothread1')
self.assert_qmp(result, 'return', {})
self.reopen(opts, {'backing': 'hd2'}, "Cannot use a new backing file with a different AioContext")
result = self.vm.qmp('x-blockdev-set-iothread', node_name='hd2', iothread='iothread0')
self.assert_qmp(result, 'return', {})
self.reopen(opts, {'backing': 'hd2'})
if __name__ == '__main__':
iotests.main(supported_fmts=["qcow2"])

5
tests/qemu-iotests/245.out Normal file
View file

@ -0,0 +1,5 @@
..................
----------------------------------------------------------------------
Ran 18 tests
OK

1
tests/qemu-iotests/group
View file

@ -243,3 +243,4 @@
242 rw auto quick
243 rw auto quick
244 rw auto quick
245 rw auto

2
tests/virtio-blk-test.c
View file

@ -751,7 +751,7 @@ static void *virtio_blk_test_setup(GString *cmd_line, void *arg)
char *tmp_path = drive_create();
g_string_append_printf(cmd_line,
" -drive if=none,id=drive0,file=%s,format=raw "
" -drive if=none,id=drive0,file=%s,format=raw,auto-read-only=off "
"-drive if=none,id=drive1,file=null-co://,format=raw ",
tmp_path);