4d804b5305
Launching the destination VM before the source VM gives us a regression test for HEAD^: The guest device causes a read from the disk image through guess_disk_lchs(). This will not work if the first sector (containing the partition table) is yet unallocated, we use COR, and the node is inactive. By launching the source VM before the destination, however, the COR filter on the source will allocate that area in the image shared between both VMs, thus the problem will not become apparent. Switching the launch order causes the sector to still be unallocated when guess_disk_lchs() runs on the inactive node in the destination VM, and thus we get our test case. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 20191001174827.11081-3-mreitz@redhat.com Message-Id: <20191001174827.11081-3-mreitz@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
83 lines
3 KiB
Python
Executable file
83 lines
3 KiB
Python
Executable file
#!/usr/bin/env python
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#
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# Copyright (C) 2019 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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# Creator/Owner: Kevin Wolf <kwolf@redhat.com>
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#
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# Test migration with filter drivers present. Keep everything in an
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# iothread just for fun.
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import iotests
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import os
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iotests.verify_image_format(supported_fmts=['qcow2'])
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iotests.verify_platform(['linux'])
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with iotests.FilePath('img') as img_path, \
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iotests.FilePath('mig_fifo') as fifo, \
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iotests.VM(path_suffix='a') as vm_a, \
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iotests.VM(path_suffix='b') as vm_b:
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def add_opts(vm):
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vm.add_object('iothread,id=iothread0')
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vm.add_object('throttle-group,id=tg0,x-bps-total=65536')
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vm.add_blockdev('file,filename=%s,node-name=drive0-file' % (img_path))
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vm.add_blockdev('%s,file=drive0-file,node-name=drive0-fmt' % (iotests.imgfmt))
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vm.add_blockdev('copy-on-read,file=drive0-fmt,node-name=drive0-cor')
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vm.add_blockdev('throttle,file=drive0-cor,node-name=drive0-throttle,throttle-group=tg0')
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vm.add_blockdev('blkdebug,image=drive0-throttle,node-name=drive0-dbg')
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vm.add_blockdev('null-co,node-name=null,read-zeroes=on')
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vm.add_blockdev('blkverify,test=drive0-dbg,raw=null,node-name=drive0-verify')
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if iotests.supports_quorum():
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vm.add_blockdev('quorum,children.0=drive0-verify,vote-threshold=1,node-name=drive0-quorum')
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root = "drive0-quorum"
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else:
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root = "drive0-verify"
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vm.add_device('virtio-blk,drive=%s,iothread=iothread0' % root)
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iotests.qemu_img_pipe('create', '-f', iotests.imgfmt, img_path, '64M')
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os.mkfifo(fifo)
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iotests.log('Launching destination VM...')
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add_opts(vm_b)
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vm_b.add_incoming("exec: cat '%s'" % (fifo))
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vm_b.launch()
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vm_b.enable_migration_events('B')
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iotests.log('Launching source VM...')
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add_opts(vm_a)
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vm_a.launch()
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vm_a.enable_migration_events('A')
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iotests.log('Starting migration to B...')
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iotests.log(vm_a.qmp('migrate', uri='exec:cat >%s' % (fifo)))
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with iotests.Timeout(3, 'Migration does not complete'):
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# Wait for the source first (which includes setup=setup)
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vm_a.wait_migration()
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# Wait for the destination second (which does not)
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vm_b.wait_migration()
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iotests.log(vm_a.qmp('query-migrate')['return']['status'])
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iotests.log(vm_b.qmp('query-migrate')['return']['status'])
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iotests.log(vm_a.qmp('query-status'))
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iotests.log(vm_b.qmp('query-status'))
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