vfs: don't open real
Let overlayfs do its thing when opening a file.
This enables stacking and fixes the corner case when a file is opened for
read, modified through a writable open, and data is read from the read-only
file. After this patch the read-only open will not return stale data even
in this case.
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/open.c b/fs/open.c
index dd15711..38790da 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -893,13 +893,8 @@ EXPORT_SYMBOL(file_path);
*/
int vfs_open(const struct path *path, struct file *file)
{
- struct dentry *dentry = d_real(path->dentry, NULL, file->f_flags, 0);
-
- if (IS_ERR(dentry))
- return PTR_ERR(dentry);
-
file->f_path = *path;
- return do_dentry_open(file, d_backing_inode(dentry), NULL);
+ return do_dentry_open(file, d_backing_inode(path->dentry), NULL);
}
struct file *dentry_open(const struct path *path, int flags,
