Line data    Source code

       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_spinlock_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           0 :         spin_lock(&fs->lock);
      30           0 :         *root = fs->root;
      31           0 :         path_get(root);
      32           0 :         spin_unlock(&fs->lock);
      33             : }
      34             : 
      35             : static inline void get_fs_pwd(struct fs_struct *fs, struct path *pwd)
      36             : {
      37           0 :         spin_lock(&fs->lock);
      38           0 :         *pwd = fs->pwd;
      39           0 :         path_get(pwd);
      40           0 :         spin_unlock(&fs->lock);
      41             : }
      42             : 
      43             : extern bool current_chrooted(void);
      44             : 
      45             : #endif /* _LINUX_FS_STRUCT_H */