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TOMOYO Linux Cross Reference
Linux/include/linux/fs_struct.h

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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 */
 46 

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