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[fio.git] / engines / libaio.c

diff --git a/engines/libaio.c b/engines/libaio.c
index a659ba9bc141890b57ff0b29180eb446bf6dc17f..8f677115056d2e922bda4eaa5f766423db07b6ec 100644 (file)
--- a/engines/libaio.c
+++ b/engines/libaio.c
@@ -1,5 +1,7 @@
 /*
- * native linux aio io engine
+ * libaio engine
+ *
+ * IO engine using the Linux native aio interface.
  *
  */
 #include <stdio.h>
@@ -9,7 +11,6 @@
 #include <assert.h>
 
 #include "../fio.h"
-#include "../os.h"
 
 #ifdef FIO_HAVE_LIBAIO
 
@@ -42,8 +43,21 @@ 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;
+
+       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 ev_to_iou(ld->aio_events + event);
+       return io_u;
 }
 
 static int fio_libaio_getevents(struct thread_data *td, int min, int max,
@@ -72,7 +86,9 @@ static int fio_libaio_queue(struct thread_data *td, struct io_u *io_u)
 {
        struct libaio_data *ld = td->io_ops->data;
 
-       if (ld->iocbs_nr == (int) td->iodepth)
+       fio_ro_check(td, io_u);
+
+       if (ld->iocbs_nr == (int) td->o.iodepth)
                return FIO_Q_BUSY;
 
        /*
@@ -175,20 +191,29 @@ static void fio_libaio_cleanup(struct thread_data *td)
 static int fio_libaio_init(struct thread_data *td)
 {
        struct libaio_data *ld = malloc(sizeof(*ld));
+       static int warn_print;
+       int err;
+
+       if (td->o.iodepth > 1 && !td->o.odirect && !warn_print) {
+               log_info("fio: libaio engine is only async for non-buffered IO\n");
+               warn_print = 1;
+       }
 
        memset(ld, 0, sizeof(*ld));
-       if (io_queue_init(td->iodepth, &ld->aio_ctx)) {
-               td_verror(td, errno);
+
+       err = io_queue_init(td->o.iodepth, &ld->aio_ctx);
+       if (err) {
+               td_verror(td, -err, "io_queue_init");
                free(ld);
                return 1;
        }
 
-       ld->aio_events = malloc(td->iodepth * sizeof(struct io_event));
-       memset(ld->aio_events, 0, td->iodepth * sizeof(struct io_event));
-       ld->iocbs = malloc(td->iodepth * sizeof(struct iocb *));
+       ld->aio_events = malloc(td->o.iodepth * sizeof(struct io_event));
+       memset(ld->aio_events, 0, td->o.iodepth * sizeof(struct io_event));
+       ld->iocbs = malloc(td->o.iodepth * sizeof(struct iocb *));
        memset(ld->iocbs, 0, sizeof(struct iocb *));
-       ld->io_us = malloc(td->iodepth * sizeof(struct io_u *));
-       memset(ld->io_us, 0, td->iodepth * sizeof(struct io_u *));
+       ld->io_us = malloc(td->o.iodepth * sizeof(struct io_u *));
+       memset(ld->io_us, 0, td->o.iodepth * sizeof(struct io_u *));
        ld->iocbs_nr = 0;
 
        td->io_ops->data = ld;
@@ -206,6 +231,8 @@ static struct ioengine_ops ioengine = {
        .getevents      = fio_libaio_getevents,
        .event          = fio_libaio_event,
        .cleanup        = fio_libaio_cleanup,
+       .open_file      = generic_open_file,
+       .close_file     = generic_close_file,
 };
 
 #else /* FIO_HAVE_LIBAIO */