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