/*
   * direct.h - NILFS direct block pointer.
   *
   * Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
   *
   * 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.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
   *
   * Written by Koji Sato <koji@osrg.net>.
   */
  
  #ifndef _NILFS_DIRECT_H
  #define _NILFS_DIRECT_H
  
  #include <linux/types.h>
  #include <linux/buffer_head.h>
  #include "bmap.h"
  
  
  /**
   * struct nilfs_direct_node - direct node
   * @dn_flags: flags
   * @dn_pad: padding
   */
  struct nilfs_direct_node {
  	__u8 dn_flags;
  	__u8 pad[7];
  };
  
  #define NILFS_DIRECT_NBLOCKS	(NILFS_BMAP_SIZE / sizeof(__le64) - 1)
  #define NILFS_DIRECT_KEY_MIN	0
  #define NILFS_DIRECT_KEY_MAX	(NILFS_DIRECT_NBLOCKS - 1)
  
  
  int nilfs_direct_init(struct nilfs_bmap *);
  int nilfs_direct_delete_and_convert(struct nilfs_bmap *, __u64, __u64 *,
  				    __u64 *, int);
  
  
  #endif	/* _NILFS_DIRECT_H */