From 77ba0228677547ab5a13dce7ade677414f766b89 Mon Sep 17 00:00:00 2001
From: Pedro Martelletto <pedro@cvs.openbsd.org>
Date: Thu, 29 Sep 2005 22:31:31 +0000
Subject: Sync dirty data when going from read-write to read-only. Verified
 against FreeBSD, closes PR 4526, okay deraadt@.

---
 sys/ufs/ffs/ffs_vfsops.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'sys/ufs/ffs')

diff --git a/sys/ufs/ffs/ffs_vfsops.c b/sys/ufs/ffs/ffs_vfsops.c
index 0c54b77c511..98566ea48be 100644
--- a/sys/ufs/ffs/ffs_vfsops.c
+++ b/sys/ufs/ffs/ffs_vfsops.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ffs_vfsops.c,v 1.70 2005/07/03 20:14:02 drahn Exp $	*/
+/*	$OpenBSD: ffs_vfsops.c,v 1.71 2005/09/29 22:31:30 pedro Exp $	*/
 /*	$NetBSD: ffs_vfsops.c,v 1.19 1996/02/09 22:22:26 christos Exp $	*/
 
 /*
@@ -202,6 +202,13 @@ ffs_mount(mp, path, data, ndp, p)
 		ronly = fs->fs_ronly;
 
 		if (ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
+			/*
+			 * Flush any dirty data.
+			 */
+			VFS_SYNC(mp, MNT_WAIT, p->p_ucred, p);
+			/*
+			 * Get rid of files open for writing.
+			 */
 			flags = WRITECLOSE;
 			if (mp->mnt_flag & MNT_FORCE)
 				flags |= FORCECLOSE;
-- 
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