Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
qemu-iotests: add shrinking image test
Signed-off-by: Pavel Butsykin <pbutsykin@virtuozzo.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Message-id: 20170918124230.8152-5-pbutsykin@virtuozzo.com Signed-off-by: Max Reitz <mreitz@redhat.com>
- Loading branch information
Showing
3 changed files
with
176 additions
and
0 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,170 @@ | ||
#!/usr/bin/env python | ||
# | ||
# Tests for shrinking images | ||
# | ||
# Copyright (c) 2016-2017 Parallels International GmbH | ||
# | ||
# 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, random, iotests, struct, qcow2 | ||
from iotests import qemu_img, qemu_io, image_size | ||
|
||
test_img = os.path.join(iotests.test_dir, 'test.img') | ||
check_img = os.path.join(iotests.test_dir, 'check.img') | ||
|
||
def size_to_int(str): | ||
suff = ['B', 'K', 'M', 'G', 'T'] | ||
return int(str[:-1]) * 1024**suff.index(str[-1:]) | ||
|
||
class ShrinkBaseClass(iotests.QMPTestCase): | ||
image_len = '128M' | ||
shrink_size = '10M' | ||
chunk_size = '16M' | ||
refcount_bits = '16' | ||
|
||
def __qcow2_check(self, filename): | ||
entry_bits = 3 | ||
entry_size = 1 << entry_bits | ||
l1_mask = 0x00fffffffffffe00 | ||
div_roundup = lambda n, d: (n + d - 1) / d | ||
|
||
def split_by_n(data, n): | ||
for x in xrange(0, len(data), n): | ||
yield struct.unpack('>Q', data[x:x + n])[0] & l1_mask | ||
|
||
def check_l1_table(h, l1_data): | ||
l1_list = list(split_by_n(l1_data, entry_size)) | ||
real_l1_size = div_roundup(h.size, | ||
1 << (h.cluster_bits*2 - entry_size)) | ||
used, unused = l1_list[:real_l1_size], l1_list[real_l1_size:] | ||
|
||
self.assertTrue(len(used) != 0, "Verifying l1 table content") | ||
self.assertFalse(any(unused), "Verifying l1 table content") | ||
|
||
def check_reftable(fd, h, reftable): | ||
for offset in split_by_n(reftable, entry_size): | ||
if offset != 0: | ||
fd.seek(offset) | ||
cluster = fd.read(1 << h.cluster_bits) | ||
self.assertTrue(any(cluster), "Verifying reftable content") | ||
|
||
with open(filename, "rb") as fd: | ||
h = qcow2.QcowHeader(fd) | ||
|
||
fd.seek(h.l1_table_offset) | ||
l1_table = fd.read(h.l1_size << entry_bits) | ||
|
||
fd.seek(h.refcount_table_offset) | ||
reftable = fd.read(h.refcount_table_clusters << h.cluster_bits) | ||
|
||
check_l1_table(h, l1_table) | ||
check_reftable(fd, h, reftable) | ||
|
||
def __raw_check(self, filename): | ||
pass | ||
|
||
image_check = { | ||
'qcow2' : __qcow2_check, | ||
'raw' : __raw_check | ||
} | ||
|
||
def setUp(self): | ||
if iotests.imgfmt == 'raw': | ||
qemu_img('create', '-f', iotests.imgfmt, test_img, self.image_len) | ||
qemu_img('create', '-f', iotests.imgfmt, check_img, | ||
self.shrink_size) | ||
else: | ||
qemu_img('create', '-f', iotests.imgfmt, | ||
'-o', 'cluster_size=' + self.cluster_size + | ||
',refcount_bits=' + self.refcount_bits, | ||
test_img, self.image_len) | ||
qemu_img('create', '-f', iotests.imgfmt, | ||
'-o', 'cluster_size=%s'% self.cluster_size, | ||
check_img, self.shrink_size) | ||
qemu_io('-c', 'write -P 0xff 0 ' + self.shrink_size, check_img) | ||
|
||
def tearDown(self): | ||
os.remove(test_img) | ||
os.remove(check_img) | ||
|
||
def image_verify(self): | ||
self.assertEqual(image_size(test_img), image_size(check_img), | ||
"Verifying image size") | ||
self.image_check[iotests.imgfmt](self, test_img) | ||
|
||
if iotests.imgfmt == 'raw': | ||
return | ||
self.assertEqual(qemu_img('check', test_img), 0, | ||
"Verifying image corruption") | ||
|
||
def test_empty_image(self): | ||
qemu_img('resize', '-f', iotests.imgfmt, '--shrink', test_img, | ||
self.shrink_size) | ||
|
||
self.assertEqual( | ||
qemu_io('-c', 'read -P 0x00 %s'%self.shrink_size, test_img), | ||
qemu_io('-c', 'read -P 0x00 %s'%self.shrink_size, check_img), | ||
"Verifying image content") | ||
|
||
self.image_verify() | ||
|
||
def test_sequential_write(self): | ||
for offs in range(0, size_to_int(self.image_len), | ||
size_to_int(self.chunk_size)): | ||
qemu_io('-c', 'write -P 0xff %d %s' % (offs, self.chunk_size), | ||
test_img) | ||
|
||
qemu_img('resize', '-f', iotests.imgfmt, '--shrink', test_img, | ||
self.shrink_size) | ||
|
||
self.assertEqual(qemu_img("compare", test_img, check_img), 0, | ||
"Verifying image content") | ||
|
||
self.image_verify() | ||
|
||
def test_random_write(self): | ||
offs_list = range(0, size_to_int(self.image_len), | ||
size_to_int(self.chunk_size)) | ||
random.shuffle(offs_list) | ||
for offs in offs_list: | ||
qemu_io('-c', 'write -P 0xff %d %s' % (offs, self.chunk_size), | ||
test_img) | ||
|
||
qemu_img('resize', '-f', iotests.imgfmt, '--shrink', test_img, | ||
self.shrink_size) | ||
|
||
self.assertEqual(qemu_img("compare", test_img, check_img), 0, | ||
"Verifying image content") | ||
|
||
self.image_verify() | ||
|
||
class TestShrink512(ShrinkBaseClass): | ||
image_len = '3M' | ||
shrink_size = '1M' | ||
chunk_size = '256K' | ||
cluster_size = '512' | ||
refcount_bits = '64' | ||
|
||
class TestShrink64K(ShrinkBaseClass): | ||
cluster_size = '64K' | ||
|
||
class TestShrink1M(ShrinkBaseClass): | ||
cluster_size = '1M' | ||
refcount_bits = '1' | ||
|
||
ShrinkBaseClass = None | ||
|
||
if __name__ == '__main__': | ||
iotests.main(supported_fmts=['raw', 'qcow2']) |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,5 @@ | ||
......... | ||
---------------------------------------------------------------------- | ||
Ran 9 tests | ||
|
||
OK |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters