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Block patches 

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Merge remote-tracking branch 'mreitz/tags/pull-block-2017-09-26' into queue-block

Block patches

# gpg: Signature made Tue Sep 26 15:01:00 2017 CEST
# gpg:                using RSA key F407DB0061D5CF40
# gpg: Good signature from "Max Reitz <mreitz@redhat.com>"
# Primary key fingerprint: 91BE B60A 30DB 3E88 57D1  1829 F407 DB00 61D5 CF40

* mreitz/tags/pull-block-2017-09-26:
  block/qcow2-bitmap: fix use of uninitialized pointer
  qemu-iotests: add shrinking image test
  qcow2: add shrink image support
  qcow2: add qcow2_cache_discard
  qemu-img: add --shrink flag for resize

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2017-09-26 15:03:02 +02:00
parent 69ff158b67 5330f32b71
commit b156d51b62
15 changed files with 484 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
block/qcow2-bitmap.c
View File

@ -602,7 +602,7 @@ static Qcow2BitmapList *bitmap_list_load(BlockDriverState *bs, uint64_t offset,
goto fail;
}
bm = g_new(Qcow2Bitmap, 1);
bm = g_new0(Qcow2Bitmap, 1);
bm->table.offset = e->bitmap_table_offset;
bm->table.size = e->bitmap_table_size;
bm->flags = e->flags;

26
block/qcow2-cache.c
View File

@ -411,3 +411,29 @@ void qcow2_cache_entry_mark_dirty(BlockDriverState *bs, Qcow2Cache *c,
assert(c->entries[i].offset != 0);
c->entries[i].dirty = true;
}
void *qcow2_cache_is_table_offset(BlockDriverState *bs, Qcow2Cache *c,
uint64_t offset)
{
int i;
for (i = 0; i < c->size; i++) {
if (c->entries[i].offset == offset) {
return qcow2_cache_get_table_addr(bs, c, i);
}
}
return NULL;
}
void qcow2_cache_discard(BlockDriverState *bs, Qcow2Cache *c, void *table)
{
int i = qcow2_cache_get_table_idx(bs, c, table);
assert(c->entries[i].ref == 0);
c->entries[i].offset = 0;
c->entries[i].lru_counter = 0;
c->entries[i].dirty = false;
qcow2_cache_table_release(bs, c, i, 1);
}

50
block/qcow2-cluster.c
View File

@ -32,6 +32,56 @@
#include "qemu/bswap.h"
#include "trace.h"
int qcow2_shrink_l1_table(BlockDriverState *bs, uint64_t exact_size)
{
BDRVQcow2State *s = bs->opaque;
int new_l1_size, i, ret;
if (exact_size >= s->l1_size) {
return 0;
}
new_l1_size = exact_size;
#ifdef DEBUG_ALLOC2
fprintf(stderr, "shrink l1_table from %d to %d\n", s->l1_size, new_l1_size);
#endif
BLKDBG_EVENT(bs->file, BLKDBG_L1_SHRINK_WRITE_TABLE);
ret = bdrv_pwrite_zeroes(bs->file, s->l1_table_offset +
new_l1_size * sizeof(uint64_t),
(s->l1_size - new_l1_size) * sizeof(uint64_t), 0);
if (ret < 0) {
goto fail;
}
ret = bdrv_flush(bs->file->bs);
if (ret < 0) {
goto fail;
}
BLKDBG_EVENT(bs->file, BLKDBG_L1_SHRINK_FREE_L2_CLUSTERS);
for (i = s->l1_size - 1; i > new_l1_size - 1; i--) {
if ((s->l1_table[i] & L1E_OFFSET_MASK) == 0) {
continue;
}
qcow2_free_clusters(bs, s->l1_table[i] & L1E_OFFSET_MASK,
s->cluster_size, QCOW2_DISCARD_ALWAYS);
s->l1_table[i] = 0;
}
return 0;
fail:
/*
* If the write in the l1_table failed the image may contain a partially
* overwritten l1_table. In this case it would be better to clear the
* l1_table in memory to avoid possible image corruption.
*/
memset(s->l1_table + new_l1_size, 0,
(s->l1_size - new_l1_size) * sizeof(uint64_t));
return ret;
}
int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size,
bool exact_size)
{

140
block/qcow2-refcount.c
View File

@ -29,6 +29,7 @@
#include "block/qcow2.h"
#include "qemu/range.h"
#include "qemu/bswap.h"
#include "qemu/cutils.h"
static int64_t alloc_clusters_noref(BlockDriverState *bs, uint64_t size);
static int QEMU_WARN_UNUSED_RESULT update_refcount(BlockDriverState *bs,
@ -861,8 +862,24 @@ static int QEMU_WARN_UNUSED_RESULT update_refcount(BlockDriverState *bs,
}
s->set_refcount(refcount_block, block_index, refcount);
if (refcount == 0 && s->discard_passthrough[type]) {
update_refcount_discard(bs, cluster_offset, s->cluster_size);
if (refcount == 0) {
void *table;
table = qcow2_cache_is_table_offset(bs, s->refcount_block_cache,
offset);
if (table != NULL) {
qcow2_cache_put(bs, s->refcount_block_cache, &refcount_block);
qcow2_cache_discard(bs, s->refcount_block_cache, table);
}
table = qcow2_cache_is_table_offset(bs, s->l2_table_cache, offset);
if (table != NULL) {
qcow2_cache_discard(bs, s->l2_table_cache, table);
}
if (s->discard_passthrough[type]) {
update_refcount_discard(bs, cluster_offset, s->cluster_size);
}
}
}
@ -3045,3 +3062,122 @@ done:
qemu_vfree(new_refblock);
return ret;
}
static int qcow2_discard_refcount_block(BlockDriverState *bs,
uint64_t discard_block_offs)
{
BDRVQcow2State *s = bs->opaque;
uint64_t refblock_offs = get_refblock_offset(s, discard_block_offs);
uint64_t cluster_index = discard_block_offs >> s->cluster_bits;
uint32_t block_index = cluster_index & (s->refcount_block_size - 1);
void *refblock;
int ret;
assert(discard_block_offs != 0);
ret = qcow2_cache_get(bs, s->refcount_block_cache, refblock_offs,
&refblock);
if (ret < 0) {
return ret;
}
if (s->get_refcount(refblock, block_index) != 1) {
qcow2_signal_corruption(bs, true, -1, -1, "Invalid refcount:"
" refblock offset %#" PRIx64
", reftable index %u"
", block offset %#" PRIx64
", refcount %#" PRIx64,
refblock_offs,
offset_to_reftable_index(s, discard_block_offs),
discard_block_offs,
s->get_refcount(refblock, block_index));
qcow2_cache_put(bs, s->refcount_block_cache, &refblock);
return -EINVAL;
}
s->set_refcount(refblock, block_index, 0);
qcow2_cache_entry_mark_dirty(bs, s->refcount_block_cache, refblock);
qcow2_cache_put(bs, s->refcount_block_cache, &refblock);
if (cluster_index < s->free_cluster_index) {
s->free_cluster_index = cluster_index;
}
refblock = qcow2_cache_is_table_offset(bs, s->refcount_block_cache,
discard_block_offs);
if (refblock) {
/* discard refblock from the cache if refblock is cached */
qcow2_cache_discard(bs, s->refcount_block_cache, refblock);
}
update_refcount_discard(bs, discard_block_offs, s->cluster_size);
return 0;
}
int qcow2_shrink_reftable(BlockDriverState *bs)
{
BDRVQcow2State *s = bs->opaque;
uint64_t *reftable_tmp =
g_malloc(s->refcount_table_size * sizeof(uint64_t));
int i, ret;
for (i = 0; i < s->refcount_table_size; i++) {
int64_t refblock_offs = s->refcount_table[i] & REFT_OFFSET_MASK;
void *refblock;
bool unused_block;
if (refblock_offs == 0) {
reftable_tmp[i] = 0;
continue;
}
ret = qcow2_cache_get(bs, s->refcount_block_cache, refblock_offs,
&refblock);
if (ret < 0) {
goto out;
}
/* the refblock has own reference */
if (i == offset_to_reftable_index(s, refblock_offs)) {
uint64_t block_index = (refblock_offs >> s->cluster_bits) &
(s->refcount_block_size - 1);
uint64_t refcount = s->get_refcount(refblock, block_index);
s->set_refcount(refblock, block_index, 0);
unused_block = buffer_is_zero(refblock, s->cluster_size);
s->set_refcount(refblock, block_index, refcount);
} else {
unused_block = buffer_is_zero(refblock, s->cluster_size);
}
qcow2_cache_put(bs, s->refcount_block_cache, &refblock);
reftable_tmp[i] = unused_block ? 0 : cpu_to_be64(s->refcount_table[i]);
}
ret = bdrv_pwrite_sync(bs->file, s->refcount_table_offset, reftable_tmp,
s->refcount_table_size * sizeof(uint64_t));
/*
* If the write in the reftable failed the image may contain a partially
* overwritten reftable. In this case it would be better to clear the
* reftable in memory to avoid possible image corruption.
*/
for (i = 0; i < s->refcount_table_size; i++) {
if (s->refcount_table[i] && !reftable_tmp[i]) {
if (ret == 0) {
ret = qcow2_discard_refcount_block(bs, s->refcount_table[i] &
REFT_OFFSET_MASK);
}
s->refcount_table[i] = 0;
}
}
if (!s->cache_discards) {
qcow2_process_discards(bs, ret);
}
out:
g_free(reftable_tmp);
return ret;
}

47
block/qcow2.c
View File

@ -3104,18 +3104,43 @@ static int qcow2_truncate(BlockDriverState *bs, int64_t offset,
}
old_length = bs->total_sectors * 512;
/* shrinking is currently not supported */
if (offset < old_length) {
error_setg(errp, "qcow2 doesn't support shrinking images yet");
return -ENOTSUP;
}
new_l1_size = size_to_l1(s, offset);
ret = qcow2_grow_l1_table(bs, new_l1_size, true);
if (ret < 0) {
error_setg_errno(errp, -ret, "Failed to grow the L1 table");
return ret;
if (offset < old_length) {
if (prealloc != PREALLOC_MODE_OFF) {
error_setg(errp,
"Preallocation can't be used for shrinking an image");
return -EINVAL;
}
ret = qcow2_cluster_discard(bs, ROUND_UP(offset, s->cluster_size),
old_length - ROUND_UP(offset,
s->cluster_size),
QCOW2_DISCARD_ALWAYS, true);
if (ret < 0) {
error_setg_errno(errp, -ret, "Failed to discard cropped clusters");
return ret;
}
ret = qcow2_shrink_l1_table(bs, new_l1_size);
if (ret < 0) {
error_setg_errno(errp, -ret,
"Failed to reduce the number of L2 tables");
return ret;
}
ret = qcow2_shrink_reftable(bs);
if (ret < 0) {
error_setg_errno(errp, -ret,
"Failed to discard unused refblocks");
return ret;
}
} else {
ret = qcow2_grow_l1_table(bs, new_l1_size, true);
if (ret < 0) {
error_setg_errno(errp, -ret, "Failed to grow the L1 table");
return ret;
}
}
switch (prealloc) {

17
block/qcow2.h
View File

@ -521,6 +521,18 @@ static inline uint64_t refcount_diff(uint64_t r1, uint64_t r2)
return r1 > r2 ? r1 - r2 : r2 - r1;
}
static inline
uint32_t offset_to_reftable_index(BDRVQcow2State *s, uint64_t offset)
{
return offset >> (s->refcount_block_bits + s->cluster_bits);
}
static inline uint64_t get_refblock_offset(BDRVQcow2State *s, uint64_t offset)
{
uint32_t index = offset_to_reftable_index(s, offset);
return s->refcount_table[index] & REFT_OFFSET_MASK;
}
/* qcow2.c functions */
int qcow2_backing_read1(BlockDriverState *bs, QEMUIOVector *qiov,
int64_t sector_num, int nb_sectors);
@ -584,10 +596,12 @@ int qcow2_inc_refcounts_imrt(BlockDriverState *bs, BdrvCheckResult *res,
int qcow2_change_refcount_order(BlockDriverState *bs, int refcount_order,
BlockDriverAmendStatusCB *status_cb,
void *cb_opaque, Error **errp);
int qcow2_shrink_reftable(BlockDriverState *bs);
/* qcow2-cluster.c functions */
int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size,
bool exact_size);
int qcow2_shrink_l1_table(BlockDriverState *bs, uint64_t max_size);
int qcow2_write_l1_entry(BlockDriverState *bs, int l1_index);
int qcow2_decompress_cluster(BlockDriverState *bs, uint64_t cluster_offset);
int qcow2_encrypt_sectors(BDRVQcow2State *s, int64_t sector_num,
@ -649,6 +663,9 @@ int qcow2_cache_get(BlockDriverState *bs, Qcow2Cache *c, uint64_t offset,
int qcow2_cache_get_empty(BlockDriverState *bs, Qcow2Cache *c, uint64_t offset,
void **table);
void qcow2_cache_put(BlockDriverState *bs, Qcow2Cache *c, void **table);
void *qcow2_cache_is_table_offset(BlockDriverState *bs, Qcow2Cache *c,
uint64_t offset);
void qcow2_cache_discard(BlockDriverState *bs, Qcow2Cache *c, void *table);
/* qcow2-bitmap.c functions */
int qcow2_check_bitmaps_refcounts(BlockDriverState *bs, BdrvCheckResult *res,

8
qapi/block-core.json
View File

@ -2533,6 +2533,11 @@
#
# Trigger events supported by blkdebug.
#
# @l1_shrink_write_table: write zeros to the l1 table to shrink image.
# (since 2.11)
#
# @l1_shrink_free_l2_clusters: discard the l2 tables. (since 2.11)
#
# Since: 2.9
##
{ 'enum': 'BlkdebugEvent', 'prefix': 'BLKDBG',
@ -2549,7 +2554,8 @@
'cluster_alloc_bytes', 'cluster_free', 'flush_to_os',
'flush_to_disk', 'pwritev_rmw_head', 'pwritev_rmw_after_head',
'pwritev_rmw_tail', 'pwritev_rmw_after_tail', 'pwritev',
'pwritev_zero', 'pwritev_done', 'empty_image_prepare' ] }
'pwritev_zero', 'pwritev_done', 'empty_image_prepare',
'l1_shrink_write_table', 'l1_shrink_free_l2_clusters' ] }
##
# @BlkdebugInjectErrorOptions:

4
qemu-img-cmds.hx
View File

@ -89,9 +89,9 @@ STEXI
ETEXI
DEF("resize", img_resize,
"resize [--object objectdef] [--image-opts] [-q] filename [+ | -]size")
"resize [--object objectdef] [--image-opts] [-q] [--shrink] filename [+ | -]size")
STEXI
@item resize [--object @var{objectdef}] [--image-opts] [-q] @var{filename} [+ | -]@var{size}
@item resize [--object @var{objectdef}] [--image-opts] [-q] [--shrink] @var{filename} [+ | -]@var{size}
ETEXI
STEXI

23
qemu-img.c
View File

@ -64,6 +64,7 @@ enum {
OPTION_TARGET_IMAGE_OPTS = 263,
OPTION_SIZE = 264,
OPTION_PREALLOCATION = 265,
OPTION_SHRINK = 266,
};
typedef enum OutputFormat {
@ -3436,6 +3437,7 @@ static int img_resize(int argc, char **argv)
},
};
bool image_opts = false;
bool shrink = false;
/* Remove size from argv manually so that negative numbers are not treated
* as options by getopt. */
@ -3454,6 +3456,7 @@ static int img_resize(int argc, char **argv)
{"object", required_argument, 0, OPTION_OBJECT},
{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
{"preallocation", required_argument, 0, OPTION_PREALLOCATION},
{"shrink", no_argument, 0, OPTION_SHRINK},
{0, 0, 0, 0}
};
c = getopt_long(argc, argv, ":f:hq",
@ -3496,6 +3499,9 @@ static int img_resize(int argc, char **argv)
return 1;
}
break;
case OPTION_SHRINK:
shrink = true;
break;
}
}
if (optind != argc - 1) {
@ -3569,6 +3575,23 @@ static int img_resize(int argc, char **argv)
goto out;
}
if (total_size < current_size && !shrink) {
warn_report("Shrinking an image will delete all data beyond the "
"shrunken image's end. Before performing such an "
"operation, make sure there is no important data there.");
if (g_strcmp0(bdrv_get_format_name(blk_bs(blk)), "raw") != 0) {
error_report(
"Use the --shrink option to perform a shrink operation.");
ret = -1;
goto out;
} else {
warn_report("Using the --shrink option will suppress this message. "
"Note that future versions of qemu-img may refuse to "
"shrink images without this option.");
}
}
ret = blk_truncate(blk, total_size, prealloc, &err);
if (!ret) {
qprintf(quiet, "Image resized.\n");

6
qemu-img.texi
View File

@ -545,7 +545,7 @@ qemu-img rebase -b base.img diff.qcow2
At this point, @code{modified.img} can be discarded, since
@code{base.img + diff.qcow2} contains the same information.
@item resize [--preallocation=@var{prealloc}] @var{filename} [+ | -]@var{size}
@item resize [--shrink] [--preallocation=@var{prealloc}] @var{filename} [+ | -]@var{size}
Change the disk image as if it had been created with @var{size}.
@ -553,6 +553,10 @@ Before using this command to shrink a disk image, you MUST use file system and
partitioning tools inside the VM to reduce allocated file systems and partition
sizes accordingly. Failure to do so will result in data loss!
When shrinking images, the @code{--shrink} option must be given. This informs
qemu-img that the user acknowledges all loss of data beyond the truncated
image's end.
After using this command to grow a disk image, you must use file system and
partitioning tools inside the VM to actually begin using the new space on the
device.

4
tests/qemu-iotests/102
View File

@ -54,7 +54,7 @@ _make_test_img $IMG_SIZE
$QEMU_IO -c 'write 0 64k' "$TEST_IMG" | _filter_qemu_io
# Remove data cluster from image (first cluster: image header, second: reftable,
# third: refblock, fourth: L1 table, fifth: L2 table)
$QEMU_IMG resize -f raw "$TEST_IMG" $((5 * 64 * 1024))
$QEMU_IMG resize -f raw --shrink "$TEST_IMG" $((5 * 64 * 1024))
$QEMU_IO -c map "$TEST_IMG"
$QEMU_IMG map "$TEST_IMG"
@ -69,7 +69,7 @@ $QEMU_IO -c 'write 0 64k' "$TEST_IMG" | _filter_qemu_io
qemu_comm_method=monitor _launch_qemu -drive if=none,file="$TEST_IMG",id=drv0
$QEMU_IMG resize -f raw "$TEST_IMG" $((5 * 64 * 1024))
$QEMU_IMG resize -f raw --shrink "$TEST_IMG" $((5 * 64 * 1024))
_send_qemu_cmd $QEMU_HANDLE 'qemu-io drv0 map' 'allocated' \
| sed -e 's/^(qemu).*qemu-io drv0 map...$/(qemu) qemu-io drv0 map/'

2
tests/qemu-iotests/106
View File

@ -83,7 +83,7 @@ echo '=== Testing image shrinking ==='
for growth_mode in falloc full off; do
echo
echo "--- growth_mode=$growth_mode ---"
$QEMU_IMG resize -f "$IMGFMT" --preallocation=$growth_mode "$TEST_IMG" -${GROWTH_SIZE}K
$QEMU_IMG resize -f "$IMGFMT" --shrink --preallocation=$growth_mode "$TEST_IMG" -${GROWTH_SIZE}K
done
# success, all done

170
tests/qemu-iotests/163 Normal file
View File

@ -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'])

5
tests/qemu-iotests/163.out Normal file
View File

@ -0,0 +1,5 @@
.........
----------------------------------------------------------------------
Ran 9 tests
OK

1
tests/qemu-iotests/group
View File

@ -166,6 +166,7 @@
159 rw auto quick
160 rw auto quick
162 auto quick
163 rw auto quick
165 rw auto quick
170 rw auto quick
171 rw auto quick