[PATCH 23/39] ovl: add O_DIRECT support

From: Miklos Szeredi
Date: Tue May 29 2018 - 10:44:37 EST


Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxxxxx>
---
fs/overlayfs/file.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c
index 3f610a5b38e4..e5e7ccaaf9ec 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;
--
2.14.3