From: Jens Axboe <jens.axboe@oracle.com>
Date: Fri, 2 Mar 2007 14:16:03 +0000 (+0100)
Subject: libaio engine: proper return value checking
X-Git-Tag: fio-1.13~6
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=f423479dad8916c758792308863dcd833a1a36c8;p=fio.git

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 bd702e30..bc9c4287 100644
--- a/engines/libaio.c
+++ b/engines/libaio.c
@@ -42,8 +42,21 @@ static int fio_libaio_prep(struct thread_data fio_unused *td, struct io_u *io_u)
 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,