From a955f5297d6951517c663ac9effd94adfae6a563 Mon Sep 17 00:00:00 2001
From: Tomohiro Kusumi <kusumi.tomohiro@gmail.com>
Date: Sat, 22 Oct 2016 02:07:33 +0900
Subject: [PATCH] Add blockdev_size() support for OpenBSD

This commit is OpenBSD version of 1116dc04 in 2015.
This is exactly the same as the previous commit for NetBSD.

OpenBSD still has block device as a file type, thus it differs
from FreeBSD/DragonFlyBSD regarding FIO_HAVE_CHARDEV_SIZE.

Note that fio doesn't compile on OpenBSD 5.9 (hits lex error),
but this this commit should still be good since this function
alone compiles on OpenBSD.

Signed-off-by: Tomohiro Kusumi <kusumi.tomohiro@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
---
 os/os-openbsd.h | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/os/os-openbsd.h b/os/os-openbsd.h
index 29985109..3343cbdf 100644
--- a/os/os-openbsd.h
+++ b/os/os-openbsd.h
@@ -6,6 +6,9 @@
 #include <errno.h>
 #include <sys/param.h>
 #include <sys/statvfs.h>
+#include <sys/ioctl.h>
+#include <sys/dkio.h>
+#include <sys/disklabel.h>
 /* XXX hack to avoid conflicts between rbtree.h and <sys/tree.h> */
 #include <sys/sysctl.h>
 #undef RB_BLACK
@@ -15,7 +18,6 @@
 #include "../file.h"
 
 #undef  FIO_HAVE_ODIRECT
-#define FIO_USE_GENERIC_BDEV_SIZE
 #define FIO_USE_GENERIC_RAND
 #define FIO_USE_GENERIC_INIT_RANDOM_STATE
 #define FIO_HAVE_FS_STAT
@@ -35,6 +37,19 @@
 
 typedef off_t off64_t;
 
+static inline int blockdev_size(struct fio_file *f, unsigned long long *bytes)
+{
+	struct disklabel dl;
+
+	if (!ioctl(f->fd, DIOCGDINFO, &dl)) {
+		*bytes = ((unsigned long long)dl.d_secperunit) * dl.d_secsize;
+		return 0;
+	}
+
+	*bytes = 0;
+	return errno;
+}
+
 static inline int blockdev_invalidate_cache(struct fio_file *f)
 {
 	return EINVAL;
-- 
2.25.1