/* fs/ internal definitions
   *
   * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
   * Written by David Howells (dhowells@redhat.com)
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version
   * 2 of the License, or (at your option) any later version.
   */

  struct super_block;

  struct file_system_type;

  struct iomap;

  struct iomap_ops;

  struct linux_binprm;

  struct path;

  struct mount;

  struct shrink_control;

  /*
   * block_dev.c
   */

  #ifdef CONFIG_BLOCK

  extern void __init bdev_cache_init(void);

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

  #else

  static inline void bdev_cache_init(void)
  {
  }

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

  #endif

  /*

   * buffer.c
   */
  extern void guard_bio_eod(int rw, struct bio *bio);

  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);
  
  /*

   * namei.c
   */

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

  
  /*

   * namespace.c
   */

  extern void *copy_mount_options(const void __user *);

  extern char *copy_mount_string(const void __user *);

  extern struct vfsmount *lookup_mnt(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(struct vfsmount *);
  extern int __mnt_want_write_file(struct file *);
  extern void __mnt_drop_write(struct vfsmount *);
  extern void __mnt_drop_write_file(struct file *);

  /*
   * fs_struct.c
   */

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

  
  /*
   * file_table.c
   */

  extern struct file *get_empty_filp(void);

  
  /*
   * super.c
   */
  extern int do_remount_sb(struct super_block *, int, void *, int);

  extern bool trylock_super(struct super_block *sb);

  extern struct dentry *mount_fs(struct file_system_type *,
  			       int, const char *, void *);

  extern struct super_block *user_get_super(dev_t);

  
  /*
   * 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 long do_handle_open(int mountdirfd,
  			   struct file_handle __user *ufh, int open_flag);

  extern int open_check_o_direct(struct file *f);

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

  extern struct file *filp_clone_open(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);

  extern bool __atime_needs_update(const struct path *, struct inode *, bool);
  static inline bool atime_needs_update_rcu(const struct path *path,
  					  struct inode *inode)
  {
  	return __atime_needs_update(path, inode, true);
  }
  
  extern bool atime_needs_update_rcu(const struct path *, struct inode *);

  /*
   * fs-writeback.c
   */

  extern void inode_io_list_del(struct inode *inode);

  extern long get_nr_dirty_inodes(void);

  extern void evict_inodes(struct super_block *);

  extern int invalidate_inodes(struct super_block *, bool);

  
  /*
   * dcache.c
   */
  extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);

  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 *);

  
  /*
   * 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;

  
  /*
   * fs/ioctl.c
   */
  extern int do_vfs_ioctl(struct file *file, unsigned int fd, unsigned int cmd,
  		    unsigned long arg);
  extern long vfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);

  
  /*
   * iomap support:
   */
  typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len,
  		void *data, struct iomap *iomap);
  
  loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length,
  		unsigned flags, struct iomap_ops *ops, void *data,
  		iomap_actor_t actor);