X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=engines%2Fmmap.c;h=604f8b0902e75d9c0af70eca7ad8996b4c77f57d;hb=163f849eea2b0ce443825fa510a1cb311092a234;hp=da6906947764ba099c377be51bae7c231b070ee6;hpb=7bb48f84ac78cac1f90e3e04d0220d90d6a64a6b;p=fio.git

diff --git a/engines/mmap.c b/engines/mmap.c
index da690694..604f8b09 100644
--- a/engines/mmap.c
+++ b/engines/mmap.c
@@ -13,13 +13,14 @@
 #include <sys/mman.h>
 
 #include "../fio.h"
-#include "../os.h"
 
 static int fio_mmapio_queue(struct thread_data *td, struct io_u *io_u)
 {
 	struct fio_file *f = io_u->file;
 	unsigned long long real_off = io_u->offset - f->file_offset;
 
+	fio_ro_check(td, io_u);
+
 	if (io_u->ddir == DDIR_READ)
 		memcpy(io_u->xfer_buf, f->mmap + real_off, io_u->xfer_buflen);
 	else if (io_u->ddir == DDIR_WRITE)
@@ -61,6 +62,12 @@ static int fio_mmapio_open(struct thread_data *td, struct fio_file *f)
 	if (ret)
 		return ret;
 
+	/*
+	 * for size checkup, don't mmap anything.
+	 */
+	if (!f->io_size)
+		return 0;
+
 	if (td_rw(td))
 		flags = PROT_READ | PROT_WRITE;
 	else if (td_write(td)) {