/* SPDX-License-Identifier: GPL-2.0-or-later */

  /* fs/ internal definitions
   *
   * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
   * Written by David Howells (dhowells@redhat.com)

   */

  struct super_block;

  struct file_system_type;

  struct iomap;

  struct iomap_ops;

  struct linux_binprm;

  struct path;

  struct mount;

  struct shrink_control;

  struct fs_context;

  struct user_namespace;

  /*
   * block_dev.c
   */

  #ifdef CONFIG_BLOCK

  extern void __init bdev_cache_init(void);

  extern int __sync_blockdev(struct block_device *bdev, int wait);

  void iterate_bdevs(void (*)(struct block_device *, void *), void *);
  void emergency_thaw_bdev(struct super_block *sb);
  void bd_forget(struct inode *inode);

  #else

  static inline void bdev_cache_init(void)
  {
  }

  static inline int __sync_blockdev(struct block_device *bdev, int wait)
  {
  	return 0;
  }

  static inline void iterate_bdevs(void (*f)(struct block_device *, void *),
  		void *arg)
  {
  }
  static inline int emergency_thaw_bdev(struct super_block *sb)
  {
  	return 0;
  }
  static inline void bd_forget(struct inode *inode)
  {
  }
  #endif /* CONFIG_BLOCK */

  /*

   * buffer.c
   */

  extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
  		get_block_t *get_block, struct iomap *iomap);

  
  /*

   * char_dev.c
   */
  extern void __init chrdev_init(void);
  
  /*

   * fs_context.c
   */

  extern const struct fs_context_operations legacy_fs_context_ops;

  extern int parse_monolithic_mount_data(struct fs_context *, void *);

  extern void fc_drop_locked(struct fs_context *);

  extern void vfs_clean_context(struct fs_context *fc);
  extern int finish_clean_context(struct fs_context *fc);

  
  /*

   * namei.c
   */

  extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
  			   struct path *path, struct path *root);

  extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
  			   const char *, unsigned int, struct path *);

  long do_rmdir(int dfd, struct filename *name);

  long do_unlinkat(int dfd, struct filename *name);

  int may_linkat(struct path *link);

  
  /*

   * namespace.c
   */

  extern struct vfsmount *lookup_mnt(const struct path *);

  extern int finish_automount(struct vfsmount *, struct path *);

  extern int sb_prepare_remount_readonly(struct super_block *);

  extern void __init mnt_init(void);

  extern int __mnt_want_write_file(struct file *);

  extern void __mnt_drop_write_file(struct file *);

  extern void dissolve_on_fput(struct vfsmount *);

  
  int path_mount(const char *dev_name, struct path *path,
  		const char *type_page, unsigned long flags, void *data_page);

  int path_umount(struct path *path, int flags);

  /*
   * fs_struct.c
   */

  extern void chroot_fs_refs(const struct path *, const struct path *);

  
  /*
   * file_table.c
   */

  extern struct file *alloc_empty_file(int, const struct cred *);

  extern struct file *alloc_empty_file_noaccount(int, const struct cred *);

  
  /*
   * super.c
   */

  extern int reconfigure_super(struct fs_context *);

  extern bool trylock_super(struct super_block *sb);

  extern struct super_block *user_get_super(dev_t);

  extern bool mount_capable(struct fs_context *);

  
  /*
   * open.c
   */

  struct open_flags {
  	int open_flag;

  	umode_t mode;

  	int acc_mode;
  	int intent;

  	int lookup_flags;

  };

  extern struct file *do_filp_open(int dfd, struct filename *pathname,

  		const struct open_flags *op);

  extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,

  		const char *, const struct open_flags *);

  extern struct open_how build_open_how(int flags, umode_t mode);
  extern int build_open_flags(const struct open_how *how, struct open_flags *op);

  long do_sys_ftruncate(unsigned int fd, loff_t length, int small);

  int chmod_common(const struct path *path, umode_t mode);

  int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group,
  		int flag);

  int chown_common(const struct path *path, uid_t user, gid_t group);

  extern int vfs_open(const struct path *, struct file *);

  /*
   * inode.c
   */

  extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);

  extern void inode_add_lru(struct inode *inode);

  extern int dentry_needs_remove_privs(struct dentry *dentry);

  /*
   * fs-writeback.c
   */

  extern long get_nr_dirty_inodes(void);

  extern int invalidate_inodes(struct super_block *, bool);

  
  /*
   * dcache.c
   */

  extern int d_set_mounted(struct dentry *dentry);

  extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);

  extern struct dentry *d_alloc_cursor(struct dentry *);

  extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);

  extern char *simple_dname(struct dentry *, char *, int);

  extern void dput_to_list(struct dentry *, struct list_head *);
  extern void shrink_dentry_list(struct list_head *);

  
  /*
   * read_write.c
   */

  extern int rw_verify_area(int, struct file *, const loff_t *, size_t);

  
  /*
   * pipe.c
   */
  extern const struct file_operations pipefifo_fops;

  
  /*
   * fs_pin.c
   */

  extern void group_pin_kill(struct hlist_head *p);

  extern void mnt_pin_kill(struct mount *m);

  
  /*
   * fs/nsfs.c
   */

  extern const struct dentry_operations ns_dentry_operations;

  /* direct-io.c: */
  int sb_init_dio_done_wq(struct super_block *sb);

  
  /*
   * fs/stat.c:
   */

  int do_statx(int dfd, const char __user *filename, unsigned flags,
  	     unsigned int mask, struct statx __user *buffer);