X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=engines%2Fmmap.c;h=d4299143ecccb02cc17c43147a09b8e873dea086;hp=d32fe969832009d871cb9956b0950ef6413d2a29;hb=e1161c325f7866bae879e686d1c673ca32ab09ae;hpb=36167d82e5f49dee91c6d2cd426068edee90e36f

diff --git a/engines/mmap.c b/engines/mmap.c
index d32fe969..d4299143 100644
--- a/engines/mmap.c
+++ b/engines/mmap.c
@@ -37,15 +37,38 @@ static int fio_mmapio_queue(struct thread_data *td, struct io_u *io_u)
 	}
 
 	if (io_u->error)
-		td_verror(td, io_u->error);
+		td_verror(td, io_u->error, "sync");
 
 	return FIO_Q_COMPLETED;
 }
 
+static int fio_mmapio_init(struct thread_data *td)
+{
+	struct fio_file *f;
+	int i;
+
+	if (td->ddir == DDIR_READ && !td_rw(td))
+		return 0;
+
+	/*
+	 * We need to truncate the files to the right size, if
+	 * we are writing to it.
+	 */
+	for_each_file(td, f, i) {
+		if (ftruncate(f->fd, f->file_size) < 0) {
+			td_verror(td, errno, "ftruncate");
+			return 1;
+		}
+	}
+
+	return 0;
+}
+
 static struct ioengine_ops ioengine = {
 	.name		= "mmap",
 	.version	= FIO_IOOPS_VERSION,
 	.queue		= fio_mmapio_queue,
+	.init		= fio_mmapio_init,
 	.flags		= FIO_SYNCIO | FIO_MMAPIO,
 };