block: Introduce bdrv_co_do_pwritev()
This is going to become the bdrv_co_do_preadv() equivalent for writes. In this patch, however, just a function taking byte offsets is created, it doesn't align anything yet. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Benoit Canet <benoit@irqsave.net>
This commit is contained in:
parent
244eadef5c
commit
6601553e27
24
block.c
24
block.c
@ -3196,8 +3196,8 @@ static int coroutine_fn bdrv_aligned_pwritev(BlockDriverState *bs,
|
|||||||
/*
|
/*
|
||||||
* Handle a write request in coroutine context
|
* Handle a write request in coroutine context
|
||||||
*/
|
*/
|
||||||
static int coroutine_fn bdrv_co_do_writev(BlockDriverState *bs,
|
static int coroutine_fn bdrv_co_do_pwritev(BlockDriverState *bs,
|
||||||
int64_t sector_num, int nb_sectors, QEMUIOVector *qiov,
|
int64_t offset, unsigned int bytes, QEMUIOVector *qiov,
|
||||||
BdrvRequestFlags flags)
|
BdrvRequestFlags flags)
|
||||||
{
|
{
|
||||||
int ret;
|
int ret;
|
||||||
@ -3208,21 +3208,33 @@ static int coroutine_fn bdrv_co_do_writev(BlockDriverState *bs,
|
|||||||
if (bs->read_only) {
|
if (bs->read_only) {
|
||||||
return -EACCES;
|
return -EACCES;
|
||||||
}
|
}
|
||||||
if (bdrv_check_request(bs, sector_num, nb_sectors)) {
|
if (bdrv_check_byte_request(bs, offset, bytes)) {
|
||||||
return -EIO;
|
return -EIO;
|
||||||
}
|
}
|
||||||
|
|
||||||
/* throttling disk I/O */
|
/* throttling disk I/O */
|
||||||
if (bs->io_limits_enabled) {
|
if (bs->io_limits_enabled) {
|
||||||
bdrv_io_limits_intercept(bs, nb_sectors, true);
|
/* TODO Switch to byte granularity */
|
||||||
|
bdrv_io_limits_intercept(bs, bytes >> BDRV_SECTOR_BITS, true);
|
||||||
}
|
}
|
||||||
|
|
||||||
ret = bdrv_aligned_pwritev(bs, sector_num << BDRV_SECTOR_BITS,
|
ret = bdrv_aligned_pwritev(bs, offset, bytes, qiov, flags);
|
||||||
nb_sectors << BDRV_SECTOR_BITS, qiov, flags);
|
|
||||||
|
|
||||||
return ret;
|
return ret;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static int coroutine_fn bdrv_co_do_writev(BlockDriverState *bs,
|
||||||
|
int64_t sector_num, int nb_sectors, QEMUIOVector *qiov,
|
||||||
|
BdrvRequestFlags flags)
|
||||||
|
{
|
||||||
|
if (nb_sectors < 0 || nb_sectors > (INT_MAX >> BDRV_SECTOR_BITS)) {
|
||||||
|
return -EINVAL;
|
||||||
|
}
|
||||||
|
|
||||||
|
return bdrv_co_do_pwritev(bs, sector_num << BDRV_SECTOR_BITS,
|
||||||
|
nb_sectors << BDRV_SECTOR_BITS, qiov, flags);
|
||||||
|
}
|
||||||
|
|
||||||
int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num,
|
int coroutine_fn bdrv_co_writev(BlockDriverState *bs, int64_t sector_num,
|
||||||
int nb_sectors, QEMUIOVector *qiov)
|
int nb_sectors, QEMUIOVector *qiov)
|
||||||
{
|
{
|
||||||
|
Loading…
Reference in New Issue
Block a user