libaio engine: proper return value checking
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/engines/libaio.c b/engines/libaio.c
index bd702e3..bc9c428 100644
--- a/engines/libaio.c
+++ b/engines/libaio.c
@@ -42,8 +42,21 @@
static struct io_u *fio_libaio_event(struct thread_data *td, int event)
{
struct libaio_data *ld = td->io_ops->data;
+ struct io_event *ev;
+ struct io_u *io_u;
- return ev_to_iou(ld->aio_events + event);
+ ev = ld->aio_events + event;
+ io_u = ev_to_iou(ev);
+
+ if (ev->res != io_u->xfer_buflen) {
+ if (ev->res > io_u->xfer_buflen)
+ io_u->error = -ev->res;
+ else
+ io_u->resid = io_u->xfer_buflen - ev->res;
+ } else
+ io_u->error = 0;
+
+ return io_u;
}
static int fio_libaio_getevents(struct thread_data *td, int min, int max,