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qemu/qemu-img-add-qemu-img-direct-create.patch
Chen Qun 1dd60910b1 qemu-img: add qemu-img direct create 
Introdue buffer_size while creating raw file, then we
can controll the speed of direct write by:
    qemu-img create -t 'cache' -o buffer_size='num'

Signed-off-by: Jinhua Cao <caojinhua1@huawei.com>
2022-03-19 14:42:32 +08:00

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From 8832a7dcad4e09229537781ff8db98496aa6f533 Mon Sep 17 00:00:00 2001
From: Jinhua Cao <caojinhua1@huawei.com>
Date: Thu, 10 Feb 2022 21:27:53 +0800
Subject: [PATCH] qemu-img: add qemu-img direct create
Introdue buffer_size while creating raw file, then we
can controll the speed of direct write by:
qemu-img create -t 'cache' -o buffer_size='num'
Signed-off-by: Jinhua Cao <caojinhua1@huawei.com>
---
block/file-posix.c | 65 +++++++++++++++++++++--
include/block/block_int.h | 2 +
qapi/block-core.json | 6 ++-
qemu-img-cmds.hx | 4 +-
qemu-img.c | 14 ++++-
tests/qemu-iotests/049.out | 102 ++++++++++++++++++-------------------
tests/qemu-iotests/099.out | 2 +-
7 files changed, 134 insertions(+), 61 deletions(-)
diff --git a/block/file-posix.c b/block/file-posix.c
index aed7529f44..5180fd1d0b 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -128,6 +128,10 @@
#define FTYPE_CD 1
#define MAX_BLOCKSIZE 4096
+#define DEFAULT_BUFFER_SIZE 65536
+#define BUFFER_ALIGN_SIZE 65536
+#define MIN_BUFFER_SIZE 65536
+#define MAX_BUFFER_SIZE 16777216
/* Posix file locking bytes. Libvirt takes byte 0, we start from higher bytes,
* leaving a few more bytes for its future use. */
@@ -206,6 +210,8 @@ typedef struct RawPosixAIOData {
off_t aio_offset;
uint64_t aio_nbytes;
+ size_t buffer_size;
+
union {
struct {
struct iovec *iov;
@@ -2218,7 +2224,8 @@ static void raw_close(BlockDriverState *bs)
*/
static int coroutine_fn
raw_regular_truncate(BlockDriverState *bs, int fd, int64_t offset,
- PreallocMode prealloc, Error **errp)
+ PreallocMode prealloc, size_t buffer_size,
+ Error **errp)
{
RawPosixAIOData acb;
@@ -2227,6 +2234,7 @@ raw_regular_truncate(BlockDriverState *bs, int fd, int64_t offset,
.aio_fildes = fd,
.aio_type = QEMU_AIO_TRUNCATE,
.aio_offset = offset,
+ .buffer_size = buffer_size,
.truncate = {
.prealloc = prealloc,
.errp = errp,
@@ -2252,7 +2260,8 @@ static int coroutine_fn raw_co_truncate(BlockDriverState *bs, int64_t offset,
if (S_ISREG(st.st_mode)) {
/* Always resizes to the exact @offset */
- return raw_regular_truncate(bs, s->fd, offset, prealloc, errp);
+ return raw_regular_truncate(bs, s->fd, offset, prealloc,
+ DEFAULT_BUFFER_SIZE, errp);
}
if (prealloc != PREALLOC_MODE_OFF) {
@@ -2465,6 +2474,8 @@ raw_co_create(BlockdevCreateOptions *options, Error **errp)
int fd;
uint64_t perm, shared;
int result = 0;
+ int flags = O_RDWR | O_BINARY;
+ size_t buffer_size = DEFAULT_BUFFER_SIZE;
/* Validate options and set default values */
assert(options->driver == BLOCKDEV_DRIVER_FILE);
@@ -2484,9 +2495,19 @@ raw_co_create(BlockdevCreateOptions *options, Error **errp)
error_setg(errp, "Extent size hint is too large");
goto out;
}
+ if (!file_opts->has_cache) {
+ file_opts->cache = g_strdup("writeback");
+ }
+ if (file_opts->preallocation == PREALLOC_MODE_FULL &&
+ !strcmp(file_opts->cache, "none")) {
+ flags |= O_DIRECT;
+ }
+ if (file_opts->has_buffersize) {
+ buffer_size = file_opts->buffersize;
+ }
/* Create file */
- fd = qemu_create(file_opts->filename, O_RDWR | O_BINARY, 0644, errp);
+ fd = qemu_create(file_opts->filename, flags, 0644, errp);
if (fd < 0) {
result = -errno;
goto out;
@@ -2521,7 +2542,8 @@ raw_co_create(BlockdevCreateOptions *options, Error **errp)
}
/* Clear the file by truncating it to 0 */
- result = raw_regular_truncate(NULL, fd, 0, PREALLOC_MODE_OFF, errp);
+ result = raw_regular_truncate(NULL, fd, 0, PREALLOC_MODE_OFF,
+ buffer_size, errp);
if (result < 0) {
goto out_unlock;
}
@@ -2565,7 +2587,8 @@ raw_co_create(BlockdevCreateOptions *options, Error **errp)
/* Resize and potentially preallocate the file to the desired
* final size */
result = raw_regular_truncate(NULL, fd, file_opts->size,
- file_opts->preallocation, errp);
+ file_opts->preallocation,
+ buffer_size, errp);
if (result < 0) {
goto out_unlock;
}
@@ -2586,6 +2609,7 @@ out_close:
error_setg_errno(errp, -result, "Could not close the new file");
}
out:
+ g_free(file_opts->cache);
return result;
}
@@ -2602,6 +2626,8 @@ static int coroutine_fn raw_co_create_opts(BlockDriver *drv,
PreallocMode prealloc;
char *buf = NULL;
Error *local_err = NULL;
+ size_t buffersize = DEFAULT_BUFFER_SIZE;
+ char *cache = NULL;
/* Skip file: protocol prefix */
strstart(filename, "file:", &filename);
@@ -2624,6 +2650,21 @@ static int coroutine_fn raw_co_create_opts(BlockDriver *drv,
return -EINVAL;
}
+ buffersize = qemu_opt_get_size_del(opts, BLOCK_OPT_BUFFER_SIZE,
+ DEFAULT_BUFFER_SIZE);
+ if (buffersize < MIN_BUFFER_SIZE || buffersize > MAX_BUFFER_SIZE) {
+ error_setg_errno(errp, EINVAL, "Buffer size must be between %d "
+ "and %d", MIN_BUFFER_SIZE, MAX_BUFFER_SIZE);
+ return -EINVAL;
+ }
+
+ cache = qemu_opt_get_del(opts, BLOCK_OPT_CACHE);
+ if (!cache) {
+ cache = g_strdup("writeback");
+ }
+
+ buffersize = ROUND_UP(buffersize, BUFFER_ALIGN_SIZE);
+
options = (BlockdevCreateOptions) {
.driver = BLOCKDEV_DRIVER_FILE,
.u.file = {
@@ -2635,6 +2676,10 @@ static int coroutine_fn raw_co_create_opts(BlockDriver *drv,
.nocow = nocow,
.has_extent_size_hint = has_extent_size_hint,
.extent_size_hint = extent_size_hint,
+ .has_buffersize = true,
+ .buffersize = buffersize,
+ .has_cache = true,
+ .cache = cache,
},
};
return raw_co_create(&options, errp);
@@ -3133,6 +3178,16 @@ static QemuOptsList raw_create_opts = {
.type = QEMU_OPT_SIZE,
.help = "Extent size hint for the image file, 0 to disable"
},
+ {
+ .name = BLOCK_OPT_CACHE,
+ .type = QEMU_OPT_STRING,
+ .help = "Cache mode (allowed values: writeback, none)"
+ },
+ {
+ .name = BLOCK_OPT_BUFFER_SIZE,
+ .type = QEMU_OPT_SIZE,
+ .help = "write buffer size"
+ },
{ /* end of list */ }
}
};
diff --git a/include/block/block_int.h b/include/block/block_int.h
index f4c75e8ba9..701f031102 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -61,6 +61,8 @@
#define BLOCK_OPT_DATA_FILE_RAW "data_file_raw"
#define BLOCK_OPT_COMPRESSION_TYPE "compression_type"
#define BLOCK_OPT_EXTL2 "extended_l2"
+#define BLOCK_OPT_CACHE "cache"
+#define BLOCK_OPT_BUFFER_SIZE "buffer_size"
#define BLOCK_PROBE_BUF_SIZE 512
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 804beabfb0..e65fabe36d 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -4437,6 +4437,8 @@
# @nocow: Turn off copy-on-write (valid only on btrfs; default: off)
# @extent-size-hint: Extent size hint to add to the image file; 0 for not
# adding an extent size hint (default: 1 MB, since 5.1)
+# @cache: Cache mode used to write the output disk image
+# @buffersize: Buffer size for creating image
#
# Since: 2.12
##
@@ -4445,7 +4447,9 @@
'size': 'size',
'*preallocation': 'PreallocMode',
'*nocow': 'bool',
- '*extent-size-hint': 'size'} }
+ '*extent-size-hint': 'size',
+ '*cache': 'str',
+ '*buffersize': 'size'} }
##
# @BlockdevCreateOptionsGluster:
diff --git a/qemu-img-cmds.hx b/qemu-img-cmds.hx
index 72bcdcfbfa..ec6aa2886a 100644
--- a/qemu-img-cmds.hx
+++ b/qemu-img-cmds.hx
@@ -52,9 +52,9 @@ SRST
ERST
DEF("create", img_create,
- "create [--object objectdef] [-q] [-f fmt] [-b backing_file] [-F backing_fmt] [-u] [-o options] filename [size]")
+ "create [--object objectdef] [-q] [-f fmt] [-b backing_file] [-F backing_fmt] [-u] [-t cache] [-o options] filename [size]")
SRST
-.. option:: create [--object OBJECTDEF] [-q] [-f FMT] [-b BACKING_FILE] [-F BACKING_FMT] [-u] [-o OPTIONS] FILENAME [SIZE]
+.. option:: create [--object OBJECTDEF] [-q] [-f FMT] [-b BACKING_FILE] [-F BACKING_FMT] [-u] [-t CACHE] [-o OPTIONS] FILENAME [SIZE]
ERST
DEF("dd", img_dd,
diff --git a/qemu-img.c b/qemu-img.c
index f036a1d428..9409558772 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -504,6 +504,7 @@ static int img_create(int argc, char **argv)
const char *base_fmt = NULL;
const char *filename;
const char *base_filename = NULL;
+ const char *cache = BDRV_DEFAULT_CACHE;
char *options = NULL;
Error *local_err = NULL;
bool quiet = false;
@@ -515,7 +516,7 @@ static int img_create(int argc, char **argv)
{"object", required_argument, 0, OPTION_OBJECT},
{0, 0, 0, 0}
};
- c = getopt_long(argc, argv, ":F:b:f:ho:qu",
+ c = getopt_long(argc, argv, ":F:b:f:t:ho:qu",
long_options, NULL);
if (c == -1) {
break;
@@ -539,6 +540,9 @@ static int img_create(int argc, char **argv)
case 'f':
fmt = optarg;
break;
+ case 't':
+ cache = optarg;
+ break;
case 'o':
if (accumulate_options(&options, optarg) < 0) {
goto fail;
@@ -582,6 +586,14 @@ static int img_create(int argc, char **argv)
error_exit("Unexpected argument: %s", argv[optind]);
}
+ if (!options) {
+ options = g_strdup_printf(BLOCK_OPT_CACHE"=%s", cache);
+ } else {
+ char *old_options = options;
+ options = g_strdup_printf("%s,"BLOCK_OPT_CACHE"=%s", options, cache);
+ g_free(old_options);
+ }
+
bdrv_img_create(filename, fmt, base_filename, base_fmt,
options, img_size, flags, quiet, &local_err);
if (local_err) {
diff --git a/tests/qemu-iotests/049.out b/tests/qemu-iotests/049.out
index 8719c91b48..6aca1a7797 100644
--- a/tests/qemu-iotests/049.out
+++ b/tests/qemu-iotests/049.out
@@ -4,90 +4,90 @@ QA output created by 049
== 1. Traditional size parameter ==
qemu-img create -f qcow2 TEST_DIR/t.qcow2 1024
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 TEST_DIR/t.qcow2 1024b
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 TEST_DIR/t.qcow2 1k
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 TEST_DIR/t.qcow2 1K
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 TEST_DIR/t.qcow2 1M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1048576 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1048576 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 TEST_DIR/t.qcow2 1G
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1073741824 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1073741824 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 TEST_DIR/t.qcow2 1T
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1099511627776 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1099511627776 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 TEST_DIR/t.qcow2 1024.0
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 TEST_DIR/t.qcow2 1024.0b
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 TEST_DIR/t.qcow2 1.5k
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1536 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1536 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 TEST_DIR/t.qcow2 1.5K
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1536 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1536 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 TEST_DIR/t.qcow2 1.5M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1572864 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1572864 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 TEST_DIR/t.qcow2 1.5G
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1610612736 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1610612736 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 TEST_DIR/t.qcow2 1.5T
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1649267441664 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1649267441664 lazy_refcounts=off refcount_bits=16 cache=writeback
== 2. Specifying size via -o ==
qemu-img create -f qcow2 -o size=1024 TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o size=1024b TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o size=1k TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o size=1K TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o size=1M TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1048576 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1048576 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o size=1G TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1073741824 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1073741824 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o size=1T TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1099511627776 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1099511627776 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o size=1024.0 TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o size=1024.0b TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1024 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o size=1.5k TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1536 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1536 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o size=1.5K TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1536 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1536 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o size=1.5M TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1572864 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1572864 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o size=1.5G TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1610612736 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1610612736 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o size=1.5T TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1649267441664 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=1649267441664 lazy_refcounts=off refcount_bits=16 cache=writeback
== 3. Invalid sizes ==
@@ -135,84 +135,84 @@ qemu-img: TEST_DIR/t.qcow2: The image size must be specified only once
== Check correct interpretation of suffixes for cluster size ==
qemu-img create -f qcow2 -o cluster_size=1024 TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=1024 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=1024 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o cluster_size=1024b TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=1024 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=1024 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o cluster_size=1k TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=1024 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=1024 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o cluster_size=1K TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=1024 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=1024 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o cluster_size=1M TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=1048576 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=1048576 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o cluster_size=1024.0 TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=1024 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=1024 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o cluster_size=1024.0b TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=1024 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=1024 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o cluster_size=0.5k TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=512 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=512 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o cluster_size=0.5K TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=512 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=512 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o cluster_size=0.5M TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=524288 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=524288 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16 cache=writeback
== Check compat level option ==
qemu-img create -f qcow2 -o compat=0.10 TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=67108864 compat=0.10 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=67108864 compat=0.10 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o compat=1.1 TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=67108864 compat=1.1 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=67108864 compat=1.1 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o compat=0.42 TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=67108864 compat=0.42 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=67108864 compat=0.42 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img: TEST_DIR/t.qcow2: Parameter 'version' does not accept value '0.42'
qemu-img create -f qcow2 -o compat=foobar TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=67108864 compat=foobar lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=67108864 compat=foobar lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img: TEST_DIR/t.qcow2: Parameter 'version' does not accept value 'foobar'
== Check preallocation option ==
qemu-img create -f qcow2 -o preallocation=off TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off preallocation=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off preallocation=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o preallocation=metadata TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off preallocation=metadata compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off preallocation=metadata compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o preallocation=1234 TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off preallocation=1234 compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off preallocation=1234 compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img: TEST_DIR/t.qcow2: Parameter 'preallocation' does not accept value '1234'
== Check encryption option ==
qemu-img create -f qcow2 -o encryption=off TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 encryption=off cluster_size=65536 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 encryption=off cluster_size=65536 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 --object secret,id=sec0,data=123456 -o encryption=on,encrypt.key-secret=sec0 TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 encryption=on encrypt.key-secret=sec0 cluster_size=65536 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 encryption=on encrypt.key-secret=sec0 cluster_size=65536 extended_l2=off compression_type=zlib size=67108864 lazy_refcounts=off refcount_bits=16 cache=writeback
== Check lazy_refcounts option (only with v3) ==
qemu-img create -f qcow2 -o compat=1.1,lazy_refcounts=off TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=67108864 compat=1.1 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=67108864 compat=1.1 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o compat=1.1,lazy_refcounts=on TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=67108864 compat=1.1 lazy_refcounts=on refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=67108864 compat=1.1 lazy_refcounts=on refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o compat=0.10,lazy_refcounts=off TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=67108864 compat=0.10 lazy_refcounts=off refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=67108864 compat=0.10 lazy_refcounts=off refcount_bits=16 cache=writeback
qemu-img create -f qcow2 -o compat=0.10,lazy_refcounts=on TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=67108864 compat=0.10 lazy_refcounts=on refcount_bits=16
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=67108864 compat=0.10 lazy_refcounts=on refcount_bits=16 cache=writeback
qemu-img: TEST_DIR/t.qcow2: Lazy refcounts only supported with compatibility level 1.1 and above (use version=v3 or greater)
== Expect error when backing file name is empty string ==
diff --git a/tests/qemu-iotests/099.out b/tests/qemu-iotests/099.out
index 8cce627529..f6f8f25957 100644
--- a/tests/qemu-iotests/099.out
+++ b/tests/qemu-iotests/099.out
@@ -1,6 +1,6 @@
QA output created by 099
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=131072
-Formatting 'TEST_DIR/t.IMGFMT.compare', fmt=raw size=131072
+Formatting 'TEST_DIR/t.IMGFMT.compare', fmt=raw size=131072 cache=writeback
=== Testing simple filename for blkverify ===
--
2.27.0
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