LXR linux/fs/nilfs2/direct.h

   1/*
   2 * direct.h - NILFS direct block pointer.
   3 *
   4 * Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation; either version 2 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * This program is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * Written by Koji Sato.
  17 */
  18
  19#ifndef _NILFS_DIRECT_H
  20#define _NILFS_DIRECT_H
  21
  22#include <linux/types.h>
  23#include <linux/buffer_head.h>
  24#include "bmap.h"
  25
  26
  27#define NILFS_DIRECT_NBLOCKS    (NILFS_BMAP_SIZE / sizeof(__le64) - 1)
  28#define NILFS_DIRECT_KEY_MIN    0
  29#define NILFS_DIRECT_KEY_MAX    (NILFS_DIRECT_NBLOCKS - 1)
  30
  31
  32int nilfs_direct_init(struct nilfs_bmap *);
  33int nilfs_direct_delete_and_convert(struct nilfs_bmap *, __u64, __u64 *,
  34                                    __u64 *, int);
  35
  36
  37#endif  /* _NILFS_DIRECT_H */
  38