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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - fs/overlayfs/ovl_entry.h
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
;
18 const char *redirect_mode
;
28 struct ovl_layer
*layer
;
29 struct dentry
*dentry
;
32 /* private information held for overlayfs's superblock */
34 struct vfsmount
*upper_mnt
;
36 struct ovl_layer
*lower_layers
;
37 /* workbasedir is the path at workdir= mount option */
38 struct dentry
*workbasedir
;
39 /* workdir is the 'work' directory under workbasedir */
40 struct dentry
*workdir
;
41 /* index directory listing overlay inodes by origin file handle */
42 struct dentry
*indexdir
;
44 /* pathnames of lower and upper dirs, for show_options */
45 struct ovl_config config
;
46 /* creds of process who forced instantiation of super block */
47 const struct cred
*creator_cred
;
50 /* sb common to all layers */
51 struct super_block
*same_sb
;
52 /* Did we take the inuse lock? */
57 /* private information held for every overlayfs dentry */
61 unsigned long has_upper
;
67 struct ovl_path lowerstack
[];
70 struct ovl_entry
*ovl_alloc_entry(unsigned int numlower
);
73 struct ovl_dir_cache
*cache
;
77 struct inode vfs_inode
;
78 struct dentry
*__upperdentry
;
81 /* synchronize copy up and more */
85 static inline struct ovl_inode
*OVL_I(struct inode
*inode
)
87 return container_of(inode
, struct ovl_inode
, vfs_inode
);
90 static inline struct dentry
*ovl_upperdentry_dereference(struct ovl_inode
*oi
)
92 return READ_ONCE(oi
->__upperdentry
);