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[v2,20/35] ovl: add O_DIRECT support

Message ID 20180507083807.28792-21-mszeredi@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Miklos Szeredi May 7, 2018, 8:37 a.m. UTC 
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
---
 fs/overlayfs/file.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c
index 2028f6886649..ce871a15e185 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;