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ovl: add O_DIRECT support
author
Miklos Szeredi
<mszeredi@redhat.com>
Wed, 18 Jul 2018 13:44:42 +0000
(15:44 +0200)
committer
Miklos Szeredi
<mszeredi@redhat.com>
Wed, 18 Jul 2018 13:44:42 +0000
(15:44 +0200)
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
fs/overlayfs/file.c
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diff --git
a/fs/overlayfs/file.c
b/fs/overlayfs/file.c
index
7590e43
..
c49af24
100644
(file)
--- 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;