X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=engines%2Fnull.c;h=acb8cf4170c4e00de963f55bae736250a37109da;hb=2dc1bbeb58edc85f2829eed6729862c438ea2353;hp=67ac4535245f40c72905dfac07df3b6c9e182b33;hpb=7401c088106ba35dcfba62ec753b6b20b72ad0e2;p=fio.git

diff --git a/engines/null.c b/engines/null.c
index 67ac4535..acb8cf41 100644
--- a/engines/null.c
+++ b/engines/null.c
@@ -1,5 +1,8 @@
 /*
- * null engine - doesn't do any transfers. Used to test fio.
+ * null engine
+ *
+ * IO engine that doesn't do any real IO transfers, it just pretends to.
+ * The main purpose is to test fio itself.
  *
  */
 #include <stdio.h>
@@ -61,18 +64,18 @@ static int fio_null_queue(struct thread_data fio_unused *td, struct io_u *io_u)
 static int fio_null_setup(struct thread_data *td)
 {
 	struct fio_file *f;
-	int i;
+	unsigned int i;
 
-	if (!td->total_file_size) {
+	if (!td->o.size) {
 		log_err("fio: need size= set\n");
 		return 1;
 	}
 
-	td->io_size = td->total_file_size;
+	td->io_size = td->o.size;
 	td->total_io_size = td->io_size;
 
 	for_each_file(td, f, i) {
-		f->real_file_size = td->total_io_size / td->nr_files;
+		f->real_file_size = td->total_io_size / td->o.nr_files;
 		f->file_size = f->real_file_size;
 	}
 
@@ -104,9 +107,9 @@ static int fio_null_init(struct thread_data *td)
 
 	memset(nd, 0, sizeof(*nd));
 
-	if (td->iodepth != 1) {
-		nd->io_us = malloc(td->iodepth * sizeof(struct io_u *));
-		memset(nd->io_us, 0, td->iodepth * sizeof(struct io_u *));
+	if (td->o.iodepth != 1) {
+		nd->io_us = malloc(td->o.iodepth * sizeof(struct io_u *));
+		memset(nd->io_us, 0, td->o.iodepth * sizeof(struct io_u *));
 	} else
 		td->io_ops->flags |= FIO_SYNCIO;