3 * Copyright (C) 2011 Novell Inc.
4 * Copyright (C) 2016 Red Hat, Inc.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published by
8 * the Free Software Foundation.
15 bool default_permissions;
26 struct ovl_layer *layer;
27 struct dentry *dentry;
30 /* private information held for overlayfs's superblock */
32 struct vfsmount *upper_mnt;
34 struct ovl_layer *lower_layers;
35 /* workbasedir is the path at workdir= mount option */
36 struct dentry *workbasedir;
37 /* workdir is the 'work' directory under workbasedir */
38 struct dentry *workdir;
39 /* index directory listing overlay inodes by origin file handle */
40 struct dentry *indexdir;
42 /* pathnames of lower and upper dirs, for show_options */
43 struct ovl_config config;
44 /* creds of process who forced instantiation of super block */
45 const struct cred *creator_cred;
48 /* sb common to all layers */
49 struct super_block *same_sb;
50 /* Did we take the inuse lock? */
55 /* private information held for every overlayfs dentry */
59 unsigned long has_upper;
65 struct ovl_path lowerstack[];
68 struct ovl_entry *ovl_alloc_entry(unsigned int numlower);
71 struct ovl_dir_cache *cache;
75 struct inode vfs_inode;
76 struct dentry *__upperdentry;
79 /* synchronize copy up and more */
83 static inline struct ovl_inode *OVL_I(struct inode *inode)
85 return container_of(inode, struct ovl_inode, vfs_inode);
88 static inline struct dentry *ovl_upperdentry_dereference(struct ovl_inode *oi)
90 return READ_ONCE(oi->__upperdentry);