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block: use int64_t instead of uint64_t in driver write handlers 

We are generally moving to int64_t for both offset and bytes parameters
on all io paths.

Main motivation is realization of 64-bit write_zeroes operation for
fast zeroing large disk chunks, up to the whole disk.

We chose signed type, to be consistent with off_t (which is signed) and
with possibility for signed return type (where negative value means
error).

So, convert driver write handlers parameters which are already 64bit to
signed type.

While being here, convert also flags parameter to be BdrvRequestFlags.

Now let's consider all callers. Simple

  git grep '\->bdrv_\(aio\|co\)_pwritev\(_part\)\?'

shows that's there three callers of driver function:

 bdrv_driver_pwritev() and bdrv_driver_pwritev_compressed() in
 block/io.c, both pass int64_t, checked by bdrv_check_qiov_request() to
 be non-negative.

 qcow2_save_vmstate() does bdrv_check_qiov_request().

Still, the functions may be called directly, not only by drv->...
Let's check:

git grep '\.bdrv_\(aio\|co\)_pwritev\(_part\)\?\s*=' | \
awk '{print $4}' | sed 's/,//' | sed 's/&//' | sort | uniq | \
while read func; do git grep "$func(" | \
grep -v "$func(BlockDriverState"; done

shows several callers:

qcow2:
  qcow2_co_truncate() write at most up to @offset, which is checked in
    generic qcow2_co_truncate() by bdrv_check_request().
  qcow2_co_pwritev_compressed_task() pass the request (or part of the
    request) that already went through normal write path, so it should
    be OK

qcow:
  qcow_co_pwritev_compressed() pass int64_t, it's updated by this patch

quorum:
  quorum_co_pwrite_zeroes() pass int64_t and int - OK

throttle:
  throttle_co_pwritev_compressed() pass int64_t, it's updated by this
  patch

vmdk:
  vmdk_co_pwritev_compressed() pass int64_t, it's updated by this
  patch

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20210903102807.27127-5-vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2021-09-03 13:28:00 +03:00 committed by Eric Blake
parent f7ef38dd13
commit e75abedab7
30 changed files with 94 additions and 84 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
block/blkdebug.c
View File

@ -652,8 +652,8 @@ blkdebug_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
}
static int coroutine_fn
blkdebug_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov, int flags)
blkdebug_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
int err;

4
block/blklogwrites.c
View File

@ -460,8 +460,8 @@ blk_log_writes_co_do_file_pdiscard(BlkLogWritesFileReq *fr)
}
static int coroutine_fn
blk_log_writes_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov, int flags)
blk_log_writes_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
return blk_log_writes_co_log(bs, offset, bytes, qiov, flags,
blk_log_writes_co_do_file_pwritev, 0, false);

2
block/blkreplay.c
View File

@ -83,7 +83,7 @@ static int coroutine_fn blkreplay_co_preadv(BlockDriverState *bs,
}
static int coroutine_fn blkreplay_co_pwritev(BlockDriverState *bs,
uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags)
int64_t offset, int64_t bytes, QEMUIOVector *qiov, BdrvRequestFlags flags)
{
uint64_t reqid = blkreplay_next_id();
int ret = bdrv_co_pwritev(bs->file, offset, bytes, qiov, flags);

4
block/blkverify.c
View File

@ -250,8 +250,8 @@ blkverify_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
}
static int coroutine_fn
blkverify_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov, int flags)
blkverify_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
BlkverifyRequest r;
return blkverify_co_prwv(bs, &r, offset, bytes, qiov, qiov, flags, true);

7
block/copy-before-write.c
View File

@ -86,9 +86,10 @@ static int coroutine_fn cbw_co_pwrite_zeroes(BlockDriverState *bs,
}
static coroutine_fn int cbw_co_pwritev(BlockDriverState *bs,
uint64_t offset,
uint64_t bytes,
QEMUIOVector *qiov, int flags)
int64_t offset,
int64_t bytes,
QEMUIOVector *qiov,
BdrvRequestFlags flags)
{
int ret = cbw_do_copy_before_write(bs, offset, bytes, flags);
if (ret < 0) {

11
block/copy-on-read.c
View File

@ -181,10 +181,11 @@ static int coroutine_fn cor_co_preadv_part(BlockDriverState *bs,
static int coroutine_fn cor_co_pwritev_part(BlockDriverState *bs,
uint64_t offset,
uint64_t bytes,
int64_t offset,
int64_t bytes,
QEMUIOVector *qiov,
size_t qiov_offset, int flags)
size_t qiov_offset,
BdrvRequestFlags flags)
{
return bdrv_co_pwritev_part(bs->file, offset, bytes, qiov, qiov_offset,
flags);
@ -207,8 +208,8 @@ static int coroutine_fn cor_co_pdiscard(BlockDriverState *bs,
static int coroutine_fn cor_co_pwritev_compressed(BlockDriverState *bs,
uint64_t offset,
uint64_t bytes,
int64_t offset,
int64_t bytes,
QEMUIOVector *qiov)
{
return bdrv_co_pwritev(bs->file, offset, bytes, qiov,

4
block/crypto.c
View File

@ -460,8 +460,8 @@ block_crypto_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
static coroutine_fn int
block_crypto_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov, int flags)
block_crypto_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
BlockCrypto *crypto = bs->opaque;
uint64_t cur_bytes; /* number of bytes in current iteration */

6
block/file-posix.c
View File

@ -2084,9 +2084,9 @@ static int coroutine_fn raw_co_preadv(BlockDriverState *bs, int64_t offset,
return raw_co_prw(bs, offset, bytes, qiov, QEMU_AIO_READ);
}
static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, uint64_t offset,
uint64_t bytes, QEMUIOVector *qiov,
int flags)
static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, int64_t offset,
int64_t bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags)
{
assert(flags == 0);
return raw_co_prw(bs, offset, bytes, qiov, QEMU_AIO_WRITE);

4
block/file-win32.c
View File

@ -455,8 +455,8 @@ static BlockAIOCB *raw_aio_preadv(BlockDriverState *bs,
}
static BlockAIOCB *raw_aio_pwritev(BlockDriverState *bs,
uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov, int flags,
int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags,
BlockCompletionFunc *cb, void *opaque)
{
BDRVRawState *s = bs->opaque;

7
block/filter-compress.c
View File

@ -74,10 +74,11 @@ static int coroutine_fn compress_co_preadv_part(BlockDriverState *bs,
static int coroutine_fn compress_co_pwritev_part(BlockDriverState *bs,
uint64_t offset,
uint64_t bytes,
int64_t offset,
int64_t bytes,
QEMUIOVector *qiov,
size_t qiov_offset, int flags)
size_t qiov_offset,
BdrvRequestFlags flags)
{
return bdrv_co_pwritev_part(bs->file, offset, bytes, qiov, qiov_offset,
flags | BDRV_REQ_WRITE_COMPRESSED);

6
block/io.c
View File

@ -1230,7 +1230,8 @@ out:
static int coroutine_fn bdrv_driver_pwritev(BlockDriverState *bs,
int64_t offset, int64_t bytes,
QEMUIOVector *qiov,
size_t qiov_offset, int flags)
size_t qiov_offset,
BdrvRequestFlags flags)
{
BlockDriver *drv = bs->drv;
int64_t sector_num;
@ -2073,7 +2074,8 @@ bdrv_co_write_req_finish(BdrvChild *child, int64_t offset, int64_t bytes,
*/
static int coroutine_fn bdrv_aligned_pwritev(BdrvChild *child,
BdrvTrackedRequest *req, int64_t offset, int64_t bytes,
int64_t align, QEMUIOVector *qiov, size_t qiov_offset, int flags)
int64_t align, QEMUIOVector *qiov, size_t qiov_offset,
BdrvRequestFlags flags)
{
BlockDriverState *bs = child->bs;
BlockDriver *drv = bs->drv;

2
block/mirror.c
View File

@ -1456,7 +1456,7 @@ out:
}
static int coroutine_fn bdrv_mirror_top_pwritev(BlockDriverState *bs,
uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags)
int64_t offset, int64_t bytes, QEMUIOVector *qiov, BdrvRequestFlags flags)
{
MirrorBDSOpaque *s = bs->opaque;
QEMUIOVector bounce_qiov;

5
block/nbd.c
View File

@ -1381,8 +1381,9 @@ static int nbd_client_co_preadv(BlockDriverState *bs, int64_t offset,
return ret ? ret : request_ret;
}
static int nbd_client_co_pwritev(BlockDriverState *bs, uint64_t offset,
uint64_t bytes, QEMUIOVector *qiov, int flags)
static int nbd_client_co_pwritev(BlockDriverState *bs, int64_t offset,
int64_t bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags)
{
BDRVNBDState *s = (BDRVNBDState *)bs->opaque;
NBDRequest request = {

6
block/nfs.c
View File

@ -296,9 +296,9 @@ static int coroutine_fn nfs_co_preadv(BlockDriverState *bs, int64_t offset,
return 0;
}
static int coroutine_fn nfs_co_pwritev(BlockDriverState *bs, uint64_t offset,
uint64_t bytes, QEMUIOVector *iov,
int flags)
static int coroutine_fn nfs_co_pwritev(BlockDriverState *bs, int64_t offset,
int64_t bytes, QEMUIOVector *iov,
BdrvRequestFlags flags)
{
NFSClient *client = bs->opaque;
NFSRPC task;

9
block/null.c
View File

@ -130,8 +130,9 @@ static coroutine_fn int null_co_preadv(BlockDriverState *bs,
}
static coroutine_fn int null_co_pwritev(BlockDriverState *bs,
uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov, int flags)
int64_t offset, int64_t bytes,
QEMUIOVector *qiov,
BdrvRequestFlags flags)
{
return null_co_common(bs);
}
@ -203,8 +204,8 @@ static BlockAIOCB *null_aio_preadv(BlockDriverState *bs,
}
static BlockAIOCB *null_aio_pwritev(BlockDriverState *bs,
uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov, int flags,
int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags,
BlockCompletionFunc *cb,
void *opaque)
{

5
block/nvme.c
View File

@ -1259,8 +1259,9 @@ static coroutine_fn int nvme_co_preadv(BlockDriverState *bs,
}
static coroutine_fn int nvme_co_pwritev(BlockDriverState *bs,
uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov, int flags)
int64_t offset, int64_t bytes,
QEMUIOVector *qiov,
BdrvRequestFlags flags)
{
return nvme_co_prw(bs, offset, bytes, qiov, true, flags);
}

6
block/preallocate.c
View File

@ -349,11 +349,11 @@ static int coroutine_fn preallocate_co_pwrite_zeroes(BlockDriverState *bs,
}
static coroutine_fn int preallocate_co_pwritev_part(BlockDriverState *bs,
uint64_t offset,
uint64_t bytes,
int64_t offset,
int64_t bytes,
QEMUIOVector *qiov,
size_t qiov_offset,
int flags)
BdrvRequestFlags flags)
{
handle_write(bs, offset, bytes, false);

10
block/qcow.c
View File

@ -714,9 +714,9 @@ static coroutine_fn int qcow_co_preadv(BlockDriverState *bs, int64_t offset,
return ret;
}
static coroutine_fn int qcow_co_pwritev(BlockDriverState *bs, uint64_t offset,
uint64_t bytes, QEMUIOVector *qiov,
int flags)
static coroutine_fn int qcow_co_pwritev(BlockDriverState *bs, int64_t offset,
int64_t bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags)
{
BDRVQcowState *s = bs->opaque;
int offset_in_cluster;
@ -1047,8 +1047,8 @@ static int qcow_make_empty(BlockDriverState *bs)
/* XXX: put compressed sectors first, then all the cluster aligned
tables to avoid losing bytes in alignment */
static coroutine_fn int
qcow_co_pwritev_compressed(BlockDriverState *bs, uint64_t offset,
uint64_t bytes, QEMUIOVector *qiov)
qcow_co_pwritev_compressed(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov)
{
BDRVQcowState *s = bs->opaque;
z_stream strm;

6
block/qcow2.c
View File

@ -2597,8 +2597,8 @@ static coroutine_fn int qcow2_co_pwritev_task_entry(AioTask *task)
}
static coroutine_fn int qcow2_co_pwritev_part(
BlockDriverState *bs, uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov, size_t qiov_offset, int flags)
BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, size_t qiov_offset, BdrvRequestFlags flags)
{
BDRVQcow2State *s = bs->opaque;
int offset_in_cluster;
@ -4631,7 +4631,7 @@ static coroutine_fn int qcow2_co_pwritev_compressed_task_entry(AioTask *task)
*/
static coroutine_fn int
qcow2_co_pwritev_compressed_part(BlockDriverState *bs,
uint64_t offset, uint64_t bytes,
int64_t offset, int64_t bytes,
QEMUIOVector *qiov, size_t qiov_offset)
{
BDRVQcow2State *s = bs->opaque;

5
block/quorum.c
View File

@ -714,8 +714,9 @@ static void write_quorum_entry(void *opaque)
}
}
static int quorum_co_pwritev(BlockDriverState *bs, uint64_t offset,
uint64_t bytes, QEMUIOVector *qiov, int flags)
static int quorum_co_pwritev(BlockDriverState *bs, int64_t offset,
int64_t bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags)
{
BDRVQuorumState *s = bs->opaque;
QuorumAIOCB *acb = quorum_aio_get(bs, qiov, offset, bytes, flags);

8
block/raw-format.c
View File

@ -216,9 +216,9 @@ static int coroutine_fn raw_co_preadv(BlockDriverState *bs, int64_t offset,
return bdrv_co_preadv(bs->file, offset, bytes, qiov, flags);
}
static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, uint64_t offset,
uint64_t bytes, QEMUIOVector *qiov,
int flags)
static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, int64_t offset,
int64_t bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags)
{
void *buf = NULL;
BlockDriver *drv;
@ -259,7 +259,7 @@ static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, uint64_t offset,
qiov = &local_qiov;
}
ret = raw_adjust_offset(bs, (int64_t *)&offset, bytes, true);
ret = raw_adjust_offset(bs, &offset, bytes, true);
if (ret) {
goto fail;
}

6
block/rbd.c
View File

@ -1172,9 +1172,9 @@ coroutine_fn qemu_rbd_co_preadv(BlockDriverState *bs, int64_t offset,
}
static int
coroutine_fn qemu_rbd_co_pwritev(BlockDriverState *bs, uint64_t offset,
uint64_t bytes, QEMUIOVector *qiov,
int flags)
coroutine_fn qemu_rbd_co_pwritev(BlockDriverState *bs, int64_t offset,
int64_t bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags)
{
BDRVRBDState *s = bs->opaque;
/*

9
block/throttle.c
View File

@ -124,8 +124,9 @@ static int coroutine_fn throttle_co_preadv(BlockDriverState *bs,
}
static int coroutine_fn throttle_co_pwritev(BlockDriverState *bs,
uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov, int flags)
int64_t offset, int64_t bytes,
QEMUIOVector *qiov,
BdrvRequestFlags flags)
{
ThrottleGroupMember *tgm = bs->opaque;
throttle_group_co_io_limits_intercept(tgm, bytes, true);
@ -153,8 +154,8 @@ static int coroutine_fn throttle_co_pdiscard(BlockDriverState *bs,
}
static int coroutine_fn throttle_co_pwritev_compressed(BlockDriverState *bs,
uint64_t offset,
uint64_t bytes,
int64_t offset,
int64_t bytes,
QEMUIOVector *qiov)
{
return throttle_co_pwritev(bs, offset, bytes, qiov,

2
block/trace-events
View File

@ -75,7 +75,7 @@ luring_resubmit_short_read(void *s, void *luringcb, int nread) "LuringState %p l
# qcow2.c
qcow2_add_task(void *co, void *bs, void *pool, const char *action, int cluster_type, uint64_t host_offset, uint64_t offset, uint64_t bytes, void *qiov, size_t qiov_offset) "co %p bs %p pool %p: %s: cluster_type %d file_cluster_offset %" PRIu64 " offset %" PRIu64 " bytes %" PRIu64 " qiov %p qiov_offset %zu"
qcow2_writev_start_req(void *co, int64_t offset, int bytes) "co %p offset 0x%" PRIx64 " bytes %d"
qcow2_writev_start_req(void *co, int64_t offset, int64_t bytes) "co %p offset 0x%" PRIx64 " bytes %" PRId64
qcow2_writev_done_req(void *co, int ret) "co %p ret %d"
qcow2_writev_start_part(void *co) "co %p"
qcow2_writev_done_part(void *co, int cur_bytes) "co %p cur_bytes %d"

4
block/vdi.c
View File

@ -600,8 +600,8 @@ vdi_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes,
}
static int coroutine_fn
vdi_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov, int flags)
vdi_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
BDRVVdiState *s = bs->opaque;
QEMUIOVector local_qiov;

8
block/vmdk.c
View File

@ -2068,8 +2068,8 @@ static int vmdk_pwritev(BlockDriverState *bs, uint64_t offset,
}
static int coroutine_fn
vmdk_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov, int flags)
vmdk_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
int ret;
BDRVVmdkState *s = bs->opaque;
@ -2080,8 +2080,8 @@ vmdk_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
}
static int coroutine_fn
vmdk_co_pwritev_compressed(BlockDriverState *bs, uint64_t offset,
uint64_t bytes, QEMUIOVector *qiov)
vmdk_co_pwritev_compressed(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov)
{
if (bytes == 0) {
/* The caller will write bytes 0 to signal EOF.

4
block/vpc.c
View File

@ -658,8 +658,8 @@ fail:
}
static int coroutine_fn
vpc_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov, int flags)
vpc_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
BDRVVPCState *s = bs->opaque;
int64_t image_offset;

4
block/vvfat.c
View File

@ -3061,8 +3061,8 @@ DLOG(checkpoint());
}
static int coroutine_fn
vvfat_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov, int flags)
vvfat_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags)
{
int ret;
BDRVVVFATState *s = bs->opaque;

16
include/block/block_int.h
View File

@ -238,8 +238,8 @@ struct BlockDriver {
int64_t offset, int64_t bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags, BlockCompletionFunc *cb, void *opaque);
BlockAIOCB *(*bdrv_aio_pwritev)(BlockDriverState *bs,
uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags,
BlockCompletionFunc *cb, void *opaque);
int64_t offset, int64_t bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags, BlockCompletionFunc *cb, void *opaque);
BlockAIOCB *(*bdrv_aio_flush)(BlockDriverState *bs,
BlockCompletionFunc *cb, void *opaque);
BlockAIOCB *(*bdrv_aio_pdiscard)(BlockDriverState *bs,
@ -288,10 +288,11 @@ struct BlockDriver {
* The buffer in @qiov may point directly to guest memory.
*/
int coroutine_fn (*bdrv_co_pwritev)(BlockDriverState *bs,
uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags);
int64_t offset, int64_t bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags);
int coroutine_fn (*bdrv_co_pwritev_part)(BlockDriverState *bs,
uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov, size_t qiov_offset, int flags);
int64_t offset, int64_t bytes, QEMUIOVector *qiov, size_t qiov_offset,
BdrvRequestFlags flags);
/*
* Efficiently zero a region of the disk image. Typically an image format
@ -438,10 +439,9 @@ struct BlockDriver {
Error **errp);
int coroutine_fn (*bdrv_co_pwritev_compressed)(BlockDriverState *bs,
uint64_t offset, uint64_t bytes, QEMUIOVector *qiov);
int64_t offset, int64_t bytes, QEMUIOVector *qiov);
int coroutine_fn (*bdrv_co_pwritev_compressed_part)(BlockDriverState *bs,
uint64_t offset, uint64_t bytes, QEMUIOVector *qiov,
size_t qiov_offset);
int64_t offset, int64_t bytes, QEMUIOVector *qiov, size_t qiov_offset);
int (*bdrv_snapshot_create)(BlockDriverState *bs,
QEMUSnapshotInfo *sn_info);

4
tests/unit/test-block-iothread.c
View File

@ -40,9 +40,9 @@ static int coroutine_fn bdrv_test_co_preadv(BlockDriverState *bs,
}
static int coroutine_fn bdrv_test_co_pwritev(BlockDriverState *bs,
uint64_t offset, uint64_t bytes,
int64_t offset, int64_t bytes,
QEMUIOVector *qiov,
int flags)
BdrvRequestFlags flags)
{
return 0;
}