static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
int64_t sector_num, uint8_t *buf, int nb_sectors,
BlockDriverCompletionFunc *cb, void *opaque)
{
RawAIOCB *acb;
/*
* If O_DIRECT is used and the buffer is not aligned fall back
* to synchronous IO.
*/
BDRVRawState *s = bs->opaque;
if (unlikely(s->aligned_buf != NULL && ((uintptr_t) buf % 512))) {
QEMUBH *bh;
acb = qemu_aio_get(bs, cb, opaque);
acb->ret = raw_pread(bs, 512 * sector_num, buf, 512 * nb_sectors);
bh = qemu_bh_new(raw_aio_em_cb, acb);
qemu_bh_schedule(bh);
return &acb->common;
}
acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque);
if (!acb)
return NULL;
if (qemu_paio_read(&acb->aiocb) < 0) {
raw_aio_remove(acb);
return NULL;
}
return &acb->common;
}
static BlockDriverAIOCB *raw_aio_readv(BlockDriverState *bs,
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
BlockDriverCompletionFunc *cb, void *opaque)
{
RawAIOCB *acb;
acb = raw_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque);
if (!acb)
return NULL;
if (qemu_paio_read(&acb->aiocb) < 0) {
raw_aio_remove(acb);
return NULL;
}
return &acb->common;
}