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1 | /* SPDX-License-Identifier: GPL-2.0 */ | |
2 | #ifndef _LINUX_FS_STRUCT_H | |
3 | #define _LINUX_FS_STRUCT_H | |
4 | ||
5 | #include <linux/path.h> | |
6 | #include <linux/spinlock.h> | |
7 | #include <linux/seqlock.h> | |
8 | ||
9 | struct fs_struct { | |
10 | int users; | |
11 | spinlock_t lock; | |
12 | seqcount_t seq; | |
13 | int umask; | |
14 | int in_exec; | |
15 | struct path root, pwd; | |
16 | } __randomize_layout; | |
17 | ||
18 | extern struct kmem_cache *fs_cachep; | |
19 | ||
20 | extern void exit_fs(struct task_struct *); | |
21 | extern void set_fs_root(struct fs_struct *, const struct path *); | |
22 | extern void set_fs_pwd(struct fs_struct *, const struct path *); | |
23 | extern struct fs_struct *copy_fs_struct(struct fs_struct *); | |
24 | extern void free_fs_struct(struct fs_struct *); | |
25 | extern int unshare_fs_struct(void); | |
26 | ||
27 | static inline void get_fs_root(struct fs_struct *fs, struct path *root) | |
28 | { | |
29 | spin_lock(&fs->lock); | |
30 | *root = fs->root; | |
31 | path_get(root); | |
32 | spin_unlock(&fs->lock); | |
33 | } | |
34 | ||
35 | static inline void get_fs_pwd(struct fs_struct *fs, struct path *pwd) | |
36 | { | |
37 | spin_lock(&fs->lock); | |
38 | *pwd = fs->pwd; | |
39 | path_get(pwd); | |
40 | spin_unlock(&fs->lock); | |
41 | } | |
42 | ||
43 | extern bool current_chrooted(void); | |
44 | ||
45 | #endif /* _LINUX_FS_STRUCT_H */ |