From: Miklos Szeredi <mszeredi@redhat.com>
Date: Wed, 18 Jul 2018 13:44:42 +0000 (+0200)
Subject: ovl: add O_DIRECT support
X-Git-Tag: v4.19-rc1~66^2~42
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=f7c72396d0de8847495f0ccb5853c711a7f91271;p=users%2Fjedix%2Flinux-maple.git

ovl: add O_DIRECT support

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
---

diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c
index 7590e43369f6b..c49af241c0013 100644
--- a/fs/overlayfs/file.c
+++ b/fs/overlayfs/file.c
@@ -110,6 +110,9 @@ static int ovl_open(struct inode *inode, struct file *file)
 	if (IS_ERR(realfile))
 		return PTR_ERR(realfile);
 
+	/* For O_DIRECT dentry_open() checks f_mapping->a_ops->direct_IO */
+	file->f_mapping = realfile->f_mapping;
+
 	file->private_data = realfile;
 
 	return 0;