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block: Change coroutine wrapper to byte granularity

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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Kevin Wolf 2013-12-05 12:09:38 +01:00
parent 28de2dcd88
commit 775aa8b6e0
1 changed files with 26 additions and 22 deletions
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48
block.c
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@ -70,11 +70,11 @@ static int coroutine_fn bdrv_co_readv_em(BlockDriverState *bs,
static int coroutine_fn bdrv_co_writev_em(BlockDriverState *bs,
int64_t sector_num, int nb_sectors,
QEMUIOVector *iov);
static int coroutine_fn bdrv_co_do_readv(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, QEMUIOVector *qiov,
static int coroutine_fn bdrv_co_do_preadv(BlockDriverState *bs,
int64_t offset, unsigned int bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags);
static int coroutine_fn bdrv_co_do_writev(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, QEMUIOVector *qiov,
static int coroutine_fn bdrv_co_do_pwritev(BlockDriverState *bs,
int64_t offset, unsigned int bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags);
static BlockDriverAIOCB *bdrv_co_aio_rw_vector(BlockDriverState *bs,
int64_t sector_num,
@ -2554,8 +2554,7 @@ static int bdrv_check_request(BlockDriverState *bs, int64_t sector_num,
typedef struct RwCo {
BlockDriverState *bs;
int64_t sector_num;
int nb_sectors;
int64_t offset;
QEMUIOVector *qiov;
bool is_write;
int ret;
@ -2567,34 +2566,32 @@ static void coroutine_fn bdrv_rw_co_entry(void *opaque)
RwCo *rwco = opaque;
if (!rwco->is_write) {
rwco->ret = bdrv_co_do_readv(rwco->bs, rwco->sector_num,
rwco->nb_sectors, rwco->qiov,
rwco->flags);
} else {
rwco->ret = bdrv_co_do_writev(rwco->bs, rwco->sector_num,
rwco->nb_sectors, rwco->qiov,
rwco->ret = bdrv_co_do_preadv(rwco->bs, rwco->offset,
rwco->qiov->size, rwco->qiov,
rwco->flags);
} else {
rwco->ret = bdrv_co_do_pwritev(rwco->bs, rwco->offset,
rwco->qiov->size, rwco->qiov,
rwco->flags);
}
}
/*
* Process a vectored synchronous request using coroutines
*/
static int bdrv_rwv_co(BlockDriverState *bs, int64_t sector_num,
QEMUIOVector *qiov, bool is_write,
BdrvRequestFlags flags)
static int bdrv_prwv_co(BlockDriverState *bs, int64_t offset,
QEMUIOVector *qiov, bool is_write,
BdrvRequestFlags flags)
{
Coroutine *co;
RwCo rwco = {
.bs = bs,
.sector_num = sector_num,
.nb_sectors = qiov->size >> BDRV_SECTOR_BITS,
.offset = offset,
.qiov = qiov,
.is_write = is_write,
.ret = NOT_DONE,
.flags = flags,
};
assert((qiov->size & (BDRV_SECTOR_SIZE - 1)) == 0);
/**
* In sync call context, when the vcpu is blocked, this throttling timer
@ -2633,7 +2630,8 @@ static int bdrv_rw_co(BlockDriverState *bs, int64_t sector_num, uint8_t *buf,
};
qemu_iovec_init_external(&qiov, &iov, 1);
return bdrv_rwv_co(bs, sector_num, &qiov, is_write, flags);
return bdrv_prwv_co(bs, sector_num << BDRV_SECTOR_BITS,
&qiov, is_write, flags);
}
/* return < 0 if error. See bdrv_write() for the return codes */
@ -2671,7 +2669,7 @@ int bdrv_write(BlockDriverState *bs, int64_t sector_num,
int bdrv_writev(BlockDriverState *bs, int64_t sector_num, QEMUIOVector *qiov)
{
return bdrv_rwv_co(bs, sector_num, qiov, true, 0);
return bdrv_prwv_co(bs, sector_num << BDRV_SECTOR_BITS, qiov, true, 0);
}
int bdrv_write_zeroes(BlockDriverState *bs, int64_t sector_num,
@ -4856,9 +4854,15 @@ int bdrv_flush(BlockDriverState *bs)
return rwco.ret;
}
typedef struct DiscardCo {
BlockDriverState *bs;
int64_t sector_num;
int nb_sectors;
int ret;
} DiscardCo;
static void coroutine_fn bdrv_discard_co_entry(void *opaque)
{
RwCo *rwco = opaque;
DiscardCo *rwco = opaque;
rwco->ret = bdrv_co_discard(rwco->bs, rwco->sector_num, rwco->nb_sectors);
}
@ -4942,7 +4946,7 @@ int coroutine_fn bdrv_co_discard(BlockDriverState *bs, int64_t sector_num,
int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors)
{
Coroutine *co;
RwCo rwco = {
DiscardCo rwco = {
.bs = bs,
.sector_num = sector_num,
.nb_sectors = nb_sectors,