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Commit | Line | Data |
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bbb1e54d MS |
1 | /* |
2 | * | |
3 | * Copyright (C) 2011 Novell Inc. | |
4 | * Copyright (C) 2016 Red Hat, Inc. | |
5 | * | |
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. | |
9 | */ | |
10 | ||
11 | struct ovl_config { | |
12 | char *lowerdir; | |
13 | char *upperdir; | |
14 | char *workdir; | |
15 | bool default_permissions; | |
16 | }; | |
17 | ||
18 | /* private information held for overlayfs's superblock */ | |
19 | struct ovl_fs { | |
20 | struct vfsmount *upper_mnt; | |
21 | unsigned numlower; | |
22 | struct vfsmount **lower_mnt; | |
23 | struct dentry *workdir; | |
6b2d5fe4 | 24 | long namelen; |
bbb1e54d MS |
25 | /* pathnames of lower and upper dirs, for show_options */ |
26 | struct ovl_config config; | |
27 | /* creds of process who forced instantiation of super block */ | |
28 | const struct cred *creator_cred; | |
29 | }; | |
30 | ||
31 | /* private information held for every overlayfs dentry */ | |
32 | struct ovl_entry { | |
33 | struct dentry *__upperdentry; | |
34 | struct ovl_dir_cache *cache; | |
35 | union { | |
36 | struct { | |
37 | u64 version; | |
02b69b28 | 38 | const char *redirect; |
bbb1e54d MS |
39 | bool opaque; |
40 | }; | |
41 | struct rcu_head rcu; | |
42 | }; | |
43 | unsigned numlower; | |
44 | struct path lowerstack[]; | |
45 | }; | |
46 | ||
47 | struct ovl_entry *ovl_alloc_entry(unsigned int numlower); | |
48 | ||
49 | static inline struct dentry *ovl_upperdentry_dereference(struct ovl_entry *oe) | |
50 | { | |
51 | return lockless_dereference(oe->__upperdentry); | |
52 | } |