7d8140595f
Like script_main, but doesn't require a single point of entry. Replace all existing initialization sections with this drop-in replacement. This brings debug support to all existing script-style iotests. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Message-Id: <20200331000014.11581-12-jsnow@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> [mreitz: Give 274 the same treatment] Signed-off-by: Max Reitz <mreitz@redhat.com>
242 lines
7.7 KiB
Python
Executable File
242 lines
7.7 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
#
|
|
# Test for when a backing file is considered overridden (thus, a
|
|
# json:{} filename is generated for the overlay) and when it is not
|
|
#
|
|
# Copyright (C) 2018 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: Max Reitz <mreitz@redhat.com>
|
|
|
|
import iotests
|
|
from iotests import log, qemu_img, filter_testfiles, filter_imgfmt, \
|
|
filter_qmp_testfiles, filter_qmp_imgfmt
|
|
|
|
# Need backing file and change-backing-file support
|
|
iotests.script_initialize(
|
|
supported_fmts=['qcow2', 'qed'],
|
|
supported_platforms=['linux'],
|
|
)
|
|
|
|
|
|
def log_node_info(node):
|
|
log('')
|
|
|
|
log('bs->filename: ' + node['image']['filename'],
|
|
filters=[filter_testfiles, filter_imgfmt])
|
|
log('bs->backing_file: ' + node['backing_file'],
|
|
filters=[filter_testfiles, filter_imgfmt])
|
|
|
|
if 'backing-image' in node['image']:
|
|
log('bs->backing->bs->filename: ' +
|
|
node['image']['backing-image']['filename'],
|
|
filters=[filter_testfiles, filter_imgfmt])
|
|
else:
|
|
log('bs->backing: (none)')
|
|
|
|
log('')
|
|
|
|
|
|
with iotests.FilePath('base.img') as base_img_path, \
|
|
iotests.FilePath('top.img') as top_img_path, \
|
|
iotests.VM() as vm:
|
|
|
|
assert qemu_img('create', '-f', iotests.imgfmt, base_img_path, '64M') == 0
|
|
# Choose a funny way to describe the backing filename
|
|
assert qemu_img('create', '-f', iotests.imgfmt, '-b',
|
|
'file:' + base_img_path, top_img_path) == 0
|
|
|
|
vm.launch()
|
|
|
|
log('--- Implicit backing file ---')
|
|
log('')
|
|
|
|
vm.qmp_log('blockdev-add',
|
|
node_name='node0',
|
|
driver=iotests.imgfmt,
|
|
file={
|
|
'driver': 'file',
|
|
'filename': top_img_path
|
|
},
|
|
filters=[filter_qmp_testfiles, filter_qmp_imgfmt])
|
|
|
|
# Filename should be plain, and the backing filename should not
|
|
# contain the "file:" prefix
|
|
log_node_info(vm.node_info('node0'))
|
|
|
|
vm.qmp_log('blockdev-del', node_name='node0')
|
|
|
|
log('')
|
|
log('--- change-backing-file ---')
|
|
log('')
|
|
|
|
vm.qmp_log('blockdev-add',
|
|
node_name='node0',
|
|
driver=iotests.imgfmt,
|
|
file={
|
|
'driver': 'file',
|
|
'filename': top_img_path
|
|
},
|
|
filters=[filter_qmp_testfiles, filter_qmp_imgfmt])
|
|
|
|
# Changing the backing file to a qemu-reported filename should
|
|
# result in qemu accepting the corresponding BDS as the implicit
|
|
# backing BDS (and thus not generate a json:{} filename).
|
|
# So, first, query the backing filename.
|
|
|
|
backing_filename = \
|
|
vm.node_info('node0')['image']['backing-image']['filename']
|
|
|
|
# Next, change the backing file to something different
|
|
|
|
vm.qmp_log('change-backing-file',
|
|
image_node_name='node0',
|
|
device='node0',
|
|
backing_file='null-co://',
|
|
filters=[filter_qmp_testfiles])
|
|
|
|
# Now, verify that we get a json:{} filename
|
|
# (Image header says "null-co://", actual backing file still is
|
|
# base_img_path)
|
|
|
|
log_node_info(vm.node_info('node0'))
|
|
|
|
# Change it back
|
|
# (To get header and backing file in sync)
|
|
|
|
vm.qmp_log('change-backing-file',
|
|
image_node_name='node0',
|
|
device='node0',
|
|
backing_file=backing_filename,
|
|
filters=[filter_qmp_testfiles])
|
|
|
|
# And verify that we get our original results
|
|
|
|
log_node_info(vm.node_info('node0'))
|
|
|
|
# Finally, try a "file:" prefix. While this is actually what we
|
|
# originally had in the image header, qemu will not reopen the
|
|
# backing file here, so it cannot verify that this filename
|
|
# "resolves" to the actual backing BDS's filename and will thus
|
|
# consider both to be different.
|
|
# (This may be fixed in the future.)
|
|
|
|
vm.qmp_log('change-backing-file',
|
|
image_node_name='node0',
|
|
device='node0',
|
|
backing_file=('file:' + backing_filename),
|
|
filters=[filter_qmp_testfiles])
|
|
|
|
# So now we should get a json:{} filename
|
|
|
|
log_node_info(vm.node_info('node0'))
|
|
|
|
# Remove and re-attach so we can see that (as in our first try),
|
|
# opening the image anew helps qemu resolve the header backing
|
|
# filename.
|
|
|
|
vm.qmp_log('blockdev-del', node_name='node0')
|
|
|
|
vm.qmp_log('blockdev-add',
|
|
node_name='node0',
|
|
driver=iotests.imgfmt,
|
|
file={
|
|
'driver': 'file',
|
|
'filename': top_img_path
|
|
},
|
|
filters=[filter_qmp_testfiles, filter_qmp_imgfmt])
|
|
|
|
log_node_info(vm.node_info('node0'))
|
|
|
|
vm.qmp_log('blockdev-del', node_name='node0')
|
|
|
|
log('')
|
|
log('--- Override backing file ---')
|
|
log('')
|
|
|
|
# For this test, we need the plain filename in the image header
|
|
# (because qemu cannot "canonicalize"/"resolve" the backing
|
|
# filename unless the backing file is opened implicitly with the
|
|
# overlay)
|
|
assert qemu_img('create', '-f', iotests.imgfmt, '-b', base_img_path,
|
|
top_img_path) == 0
|
|
|
|
# You can only reliably override backing options by using a node
|
|
# reference (or by specifying file.filename, but, well...)
|
|
vm.qmp_log('blockdev-add', node_name='null', driver='null-co')
|
|
|
|
vm.qmp_log('blockdev-add',
|
|
node_name='node0',
|
|
driver=iotests.imgfmt,
|
|
file={
|
|
'driver': 'file',
|
|
'filename': top_img_path
|
|
},
|
|
backing='null',
|
|
filters=[filter_qmp_testfiles, filter_qmp_imgfmt])
|
|
|
|
# Should get a json:{} filename (and bs->backing_file is
|
|
# null-co://, because that field actually has not much to do
|
|
# with the header backing filename (except that it is changed by
|
|
# change-backing-file))
|
|
|
|
log_node_info(vm.node_info('node0'))
|
|
|
|
# Detach the backing file by reopening the whole thing
|
|
|
|
vm.qmp_log('blockdev-del', node_name='node0')
|
|
vm.qmp_log('blockdev-del', node_name='null')
|
|
|
|
vm.qmp_log('blockdev-add',
|
|
node_name='node0',
|
|
driver=iotests.imgfmt,
|
|
file={
|
|
'driver': 'file',
|
|
'filename': top_img_path
|
|
},
|
|
backing=None,
|
|
filters=[filter_qmp_testfiles, filter_qmp_imgfmt])
|
|
|
|
# Should get a json:{} filename (because we overrode the backing
|
|
# file to not be there)
|
|
|
|
log_node_info(vm.node_info('node0'))
|
|
|
|
# Open the original backing file
|
|
|
|
vm.qmp_log('blockdev-add',
|
|
node_name='original-backing',
|
|
driver=iotests.imgfmt,
|
|
file={
|
|
'driver': 'file',
|
|
'filename': base_img_path
|
|
},
|
|
filters=[filter_qmp_testfiles, filter_qmp_imgfmt])
|
|
|
|
# Attach the original backing file to its overlay
|
|
|
|
vm.qmp_log('blockdev-snapshot',
|
|
node='original-backing',
|
|
overlay='node0')
|
|
|
|
# This should give us the original plain result
|
|
|
|
log_node_info(vm.node_info('node0'))
|
|
|
|
vm.qmp_log('blockdev-del', node_name='node0')
|
|
vm.qmp_log('blockdev-del', node_name='original-backing')
|
|
|
|
vm.shutdown()
|