3 # This test covers the basic fleecing workflow, which provides a
4 # point-in-time snapshot of a node that can be queried over NBD.
6 # Copyright (C) 2018 Red Hat, Inc.
9 # This program is free software; you can redistribute it and/or modify
10 # it under the terms of the GNU General Public License as published by
11 # the Free Software Foundation; either version 2 of the License, or
12 # (at your option) any later version.
14 # This program is distributed in the hope that it will be useful,
15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 # GNU General Public License for more details.
19 # You should have received a copy of the GNU General Public License
20 # along with this program. If not, see <http://www.gnu.org/licenses/>.
22 # Creator/Owner: John Snow <jsnow@redhat.com>
25 from iotests import log, qemu_img, qemu_io, qemu_io_silent
27 iotests.script_initialize(
28 supported_fmts=['qcow2', 'qcow', 'qed', 'vmdk', 'vhdx', 'raw'],
29 supported_platforms=['linux'],
32 patterns = [("0x5d", "0", "64k"),
33 ("0xd5", "1M", "64k"),
34 ("0xdc", "32M", "64k"),
35 ("0xcd", "0x3ff0000", "64k")] # 64M - 64K
37 overwrite = [("0xab", "0", "64k"), # Full overwrite
38 ("0xad", "0x00f8000", "64k"), # Partial-left (1M-32K)
39 ("0x1d", "0x2008000", "64k"), # Partial-right (32M+32K)
40 ("0xea", "0x3fe0000", "64k")] # Adjacent-left (64M - 128K)
42 zeroes = [("0", "0x00f8000", "32k"), # Left-end of partial-left (1M-32K)
43 ("0", "0x2010000", "32k"), # Right-end of partial-right (32M+64K)
44 ("0", "0x3fe0000", "64k")] # overwrite[3]
46 remainder = [("0xd5", "0x108000", "32k"), # Right-end of partial-left [1]
47 ("0xdc", "32M", "32k"), # Left-end of partial-right [2]
48 ("0xcd", "0x3ff0000", "64k")] # patterns[3]
50 with iotests.FilePath('base.img') as base_img_path, \
51 iotests.FilePath('fleece.img') as fleece_img_path, \
52 iotests.FilePath('nbd.sock', iotests.sock_dir) as nbd_sock_path, \
55 log('--- Setting up images ---')
58 assert qemu_img('create', '-f', iotests.imgfmt, base_img_path, '64M') == 0
59 assert qemu_img('create', '-f', "qcow2", fleece_img_path, '64M') == 0
62 qemu_io('-f', iotests.imgfmt,
63 '-c', 'write -P%s %s %s' % p, base_img_path)
68 log('--- Launching VM ---')
71 vm.add_drive(base_img_path)
76 log('--- Setting up Fleecing Graph ---')
80 tgt_node = "fleeceNode"
82 # create tgt_node backed by src_node
83 log(vm.qmp("blockdev-add", **{
85 "node-name": tgt_node,
88 "filename": fleece_img_path,
93 # Establish COW from source to fleecing node
94 log(vm.qmp("blockdev-backup",
100 log('--- Setting up NBD Export ---')
103 nbd_uri = 'nbd+unix:///%s?socket=%s' % (tgt_node, nbd_sock_path)
104 log(vm.qmp("nbd-server-start",
105 **{"addr": { "type": "unix",
106 "data": { "path": nbd_sock_path } } }))
108 log(vm.qmp("nbd-server-add", device=tgt_node))
111 log('--- Sanity Check ---')
114 for p in (patterns + zeroes):
115 cmd = "read -P%s %s %s" % p
117 assert qemu_io_silent('-r', '-f', 'raw', '-c', cmd, nbd_uri) == 0
120 log('--- Testing COW ---')
124 cmd = "write -P%s %s %s" % p
126 log(vm.hmp_qemu_io(src_node, cmd))
129 log('--- Verifying Data ---')
132 for p in (patterns + zeroes):
133 cmd = "read -P%s %s %s" % p
135 assert qemu_io_silent('-r', '-f', 'raw', '-c', cmd, nbd_uri) == 0
138 log('--- Cleanup ---')
141 log(vm.qmp('block-job-cancel', device=src_node))
142 log(vm.event_wait('BLOCK_JOB_CANCELLED'),
143 filters=[iotests.filter_qmp_event])
144 log(vm.qmp('nbd-server-stop'))
145 log(vm.qmp('blockdev-del', node_name=tgt_node))
149 log('--- Confirming writes ---')
152 for p in (overwrite + remainder):
153 cmd = "read -P%s %s %s" % p
155 assert qemu_io_silent(base_img_path, '-c', cmd) == 0