/* RomFS internal definitions
   *
   * Copyright © 2007 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.
   */
  
  #include <linux/romfs_fs.h>
  
  struct romfs_inode_info {
  	struct inode	vfs_inode;
  	unsigned long	i_metasize;	/* size of non-data area */
  	unsigned long	i_dataoffset;	/* from the start of fs */
  };
  
  static inline size_t romfs_maxsize(struct super_block *sb)
  {
  	return (size_t) (unsigned long) sb->s_fs_info;
  }
  
  static inline struct romfs_inode_info *ROMFS_I(struct inode *inode)
  {
  	return container_of(inode, struct romfs_inode_info, vfs_inode);
  }
  
  /*
   * mmap-nommu.c
   */
  #if !defined(CONFIG_MMU) && defined(CONFIG_ROMFS_ON_MTD)
  extern const struct file_operations romfs_ro_fops;
  #else
  #define romfs_ro_fops	generic_ro_fops
  #endif
  
  /*
   * storage.c
   */
  extern int romfs_dev_read(struct super_block *sb, unsigned long pos,
  			  void *buf, size_t buflen);
  extern ssize_t romfs_dev_strnlen(struct super_block *sb,
  				 unsigned long pos, size_t maxlen);

  extern int romfs_dev_strcmp(struct super_block *sb, unsigned long pos,
  			    const char *str, size_t size);