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block: round up file size to nearest sector 

Currently the file size requested by user is rounded down to nearest
sector, causing the actual file size could be a bit less than the size
user requested. Since some formats (like qcow2) record virtual disk
size in bytes, this can make the last few bytes cannot be accessed.

This patch fixes it by rounding up file size to nearest sector so that
the actual file size is no less than the requested file size.

Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Hu Tao 2014-09-10 17:05:45 +08:00 committed by Kevin Wolf
parent be2bfb9dbd
commit c2eb918e32
21 changed files with 127 additions and 23 deletions
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3
block/archipelago.c
View File

@ -708,7 +708,8 @@ static int qemu_archipelago_create(const char *filename,
parse_filename_opts(filename, errp, &volname, &segment_name, &mport,
&vport);
total_size = qemu_opt_get_size_del(options, BLOCK_OPT_SIZE, 0);
total_size = ROUND_UP(qemu_opt_get_size_del(options, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
if (segment_name == NULL) {
segment_name = g_strdup("archipelago");

3
block/cow.c
View File

@ -335,7 +335,8 @@ static int cow_create(const char *filename, QemuOpts *opts, Error **errp)
BlockDriverState *cow_bs = NULL;
/* Read out options */
image_sectors = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / 512;
image_sectors = DIV_ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
image_filename = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE);
ret = bdrv_create_file(filename, opts, &local_err);

4
block/gluster.c
View File

@ -494,8 +494,8 @@ static int qemu_gluster_create(const char *filename,
goto out;
}
total_size =
qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / BDRV_SECTOR_SIZE;
total_size = DIV_ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
tmp = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC);
if (!tmp || !strcmp(tmp, "off")) {

4
block/iscsi.c
View File

@ -1531,8 +1531,8 @@ static int iscsi_create(const char *filename, QemuOpts *opts, Error **errp)
bs = bdrv_new("", &error_abort);
/* Read out options */
total_size =
qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / BDRV_SECTOR_SIZE;
total_size = DIV_ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
bs->opaque = g_new0(struct IscsiLun, 1);
iscsilun = bs->opaque;

3
block/nfs.c
View File

@ -418,7 +418,8 @@ static int nfs_file_create(const char *url, QemuOpts *opts, Error **errp)
client->aio_context = qemu_get_aio_context();
/* Read out options */
total_size = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0);
total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
ret = nfs_client_open(client, url, O_CREAT, errp);
if (ret < 0) {

3
block/qcow.c
View File

@ -725,7 +725,8 @@ static int qcow_create(const char *filename, QemuOpts *opts, Error **errp)
BlockDriverState *qcow_bs;
/* Read out options */
total_size = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / 512;
total_size = DIV_ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE);
if (qemu_opt_get_bool_del(opts, BLOCK_OPT_ENCRYPT, false)) {
flags |= BLOCK_FLAG_ENCRYPT;

3
block/qcow2.c
View File

@ -1921,7 +1921,8 @@ static int qcow2_create(const char *filename, QemuOpts *opts, Error **errp)
int ret;
/* Read out options */
sectors = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / 512;
sectors = DIV_ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE);
backing_fmt = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FMT);
if (qemu_opt_get_bool_del(opts, BLOCK_OPT_ENCRYPT, false)) {

3
block/qed.c
View File

@ -648,7 +648,8 @@ static int bdrv_qed_create(const char *filename, QemuOpts *opts, Error **errp)
char *backing_fmt = NULL;
int ret;
image_size = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0);
image_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE);
backing_fmt = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FMT);
cluster_size = qemu_opt_get_size_del(opts,

8
block/raw-posix.c
View File

@ -1369,8 +1369,8 @@ static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
strstart(filename, "file:", &filename);
/* Read out options */
total_size =
qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / BDRV_SECTOR_SIZE;
total_size = DIV_ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
nocow = qemu_opt_get_bool(opts, BLOCK_OPT_NOCOW, false);
fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
@ -1966,8 +1966,8 @@ static int hdev_create(const char *filename, QemuOpts *opts,
(void)has_prefix;
/* Read out options */
total_size =
qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / BDRV_SECTOR_SIZE;
total_size = DIV_ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
fd = qemu_open(filename, O_WRONLY | O_BINARY);
if (fd < 0) {

4
block/raw-win32.c
View File

@ -511,8 +511,8 @@ static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
strstart(filename, "file:", &filename);
/* Read out options */
total_size =
qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / 512;
total_size = DIV_ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
0644);

3
block/rbd.c
View File

@ -314,7 +314,8 @@ static int qemu_rbd_create(const char *filename, QemuOpts *opts, Error **errp)
}
/* Read out options */
bytes = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0);
bytes = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
objsize = qemu_opt_get_size_del(opts, BLOCK_OPT_CLUSTER_SIZE, 0);
if (objsize) {
if ((objsize - 1) & objsize) { /* not a power of 2? */

3
block/sheepdog.c
View File

@ -1702,7 +1702,8 @@ static int sd_create(const char *filename, QemuOpts *opts,
goto out;
}
s->inode.vdi_size = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0);
s->inode.vdi_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE);
buf = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC);
if (!buf || !strcmp(buf, "off")) {

3
block/ssh.c
View File

@ -700,7 +700,8 @@ static int ssh_create(const char *filename, QemuOpts *opts, Error **errp)
ssh_state_init(&s);
/* Get desired file size. */
total_size = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0);
total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
DPRINTF("total_size=%" PRIi64, total_size);
uri_options = qdict_new();

3
block/vdi.c
View File

@ -700,7 +700,8 @@ static int vdi_create(const char *filename, QemuOpts *opts, Error **errp)
logout("\n");
/* Read out options. */
bytes = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0);
bytes = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
#if defined(CONFIG_VDI_BLOCK_SIZE)
/* TODO: Additional checks (SECTOR_SIZE * 2^n, ...). */
block_size = qemu_opt_get_size_del(opts,

3
block/vhdx.c
View File

@ -1766,7 +1766,8 @@ static int vhdx_create(const char *filename, QemuOpts *opts, Error **errp)
VHDXImageType image_type;
Error *local_err = NULL;
image_size = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0);
image_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
log_size = qemu_opt_get_size_del(opts, VHDX_BLOCK_OPT_LOG_SIZE, 0);
block_size = qemu_opt_get_size_del(opts, VHDX_BLOCK_OPT_BLOCK_SIZE, 0);
type = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT);

3
block/vmdk.c
View File

@ -1807,7 +1807,8 @@ static int vmdk_create(const char *filename, QemuOpts *opts, Error **errp)
goto exit;
}
/* Read out options */
total_size = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0);
total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
adapter_type = qemu_opt_get_del(opts, BLOCK_OPT_ADAPTER_TYPE);
backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE);
if (qemu_opt_get_bool_del(opts, BLOCK_OPT_COMPAT6, false)) {

3
block/vpc.c
View File

@ -757,7 +757,8 @@ static int vpc_create(const char *filename, QemuOpts *opts, Error **errp)
BlockDriverState *bs = NULL;
/* Read out options */
total_size = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0);
total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
disk_type_param = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT);
if (disk_type_param) {
if (!strcmp(disk_type_param, "dynamic")) {

57
tests/qemu-iotests/104 Executable file
View File

@ -0,0 +1,57 @@
#!/bin/bash
#
# Test image creation with aligned and unaligned sizes
#
# Copyright (C) 2014 Fujitsu.
#
# 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=hutao@cn.fujitsu.com
seq=`basename $0`
echo "QA output created by $seq"
here=`pwd`
tmp=/tmp/$$
status=1 # failure is the default!
_cleanup()
{
_cleanup_test_img
}
trap "_cleanup; exit \$status" 0 1 2 3 15
# get standard environment, filters and checks
. ./common.rc
. ./common.filter
_supported_fmt generic
_supported_proto generic
_supported_os Linux
echo "=== Check qemu-img info output ==="
echo
image_sizes="1024 1234"
for s in $image_sizes; do
_make_test_img $s | _filter_img_create
_img_info | _filter_img_info
done
# success, all done
echo "*** done"
rm -f $seq.full
status=0

12
tests/qemu-iotests/104.out Normal file
View File

@ -0,0 +1,12 @@
QA output created by 104
=== Check qemu-img info output ===
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1024
image: TEST_DIR/t.IMGFMT
file format: IMGFMT
virtual size: 1.0K (1024 bytes)
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1234
image: TEST_DIR/t.IMGFMT
file format: IMGFMT
virtual size: 1.5K (1536 bytes)
***done

21
tests/qemu-iotests/common.filter
View File

@ -192,5 +192,26 @@ _filter_img_create()
-e "s/archipelago:a/TEST_DIR\//g"
}
_filter_img_info()
{
sed -e "s#$IMGPROTO:$TEST_DIR#TEST_DIR#g" \
-e "s#$TEST_DIR#TEST_DIR#g" \
-e "s#$IMGFMT#IMGFMT#g" \
-e "/encrypted: yes/d" \
-e "/cluster_size: [0-9]\\+/d" \
-e "/table_size: [0-9]\\+/d" \
-e "/compat: '[^']*'/d" \
-e "/compat6: \\(on\\|off\\)/d" \
-e "/static: \\(on\\|off\\)/d" \
-e "/zeroed_grain: \\(on\\|off\\)/d" \
-e "/subformat: '[^']*'/d" \
-e "/adapter_type: '[^']*'/d" \
-e "/lazy_refcounts: \\(on\\|off\\)/d" \
-e "/block_size: [0-9]\\+/d" \
-e "/block_state_zero: \\(on\\|off\\)/d" \
-e "/log_size: [0-9]\\+/d" \
-e "s/archipelago:a/TEST_DIR\//g"
}
# make sure this script returns success
/bin/true

1
tests/qemu-iotests/group
View File

@ -104,3 +104,4 @@
100 rw auto quick
101 rw auto quick
103 rw auto quick
104 rw auto