engines/sg: Make I/O error messages more informative

[fio.git] / engines / e4defrag.c

diff --git a/engines/e4defrag.c b/engines/e4defrag.c
index 1e4996f155ef5d258ae98a2a6748701c84e5413c..3619450d295d15c344616114c491cddddcfcb0f0 100644 (file)
--- a/engines/e4defrag.c
+++ b/engines/e4defrag.c
@@ -9,11 +9,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <sys/uio.h>
 #include <errno.h>
-#include <assert.h>
 #include <fcntl.h>
 
 #include "../fio.h"
@@ -172,8 +168,13 @@ static int fio_e4defrag_queue(struct thread_data *td, struct io_u *io_u)
                len = io_u->xfer_buflen;
 
        if (len != io_u->xfer_buflen) {
-               io_u->resid = io_u->xfer_buflen - len;
-               io_u->error = 0;
+               if (len) {
+                       io_u->resid = io_u->xfer_buflen - len;
+                       io_u->error = 0;
+               } else {
+                       /* access beyond i_size */
+                       io_u->error = EINVAL;
+               }
        }
        if (ret)
                io_u->error = errno;