LXR linux/fs/nilfs2/ifile.h

   1/*
   2 * ifile.h - NILFS inode file
   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 * You should have received a copy of the GNU General Public License
  17 * along with this program; if not, write to the Free Software
  18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19 *
  20 * Written by Amagai Yoshiji <amagai@osrg.net>
  21 * Revised by Ryusuke Konishi <ryusuke@osrg.net>
  22 *
  23 */
  24
  25#ifndef _NILFS_IFILE_H
  26#define _NILFS_IFILE_H
  27
  28#include <linux/fs.h>
  29#include <linux/buffer_head.h>
  30#include <linux/nilfs2_fs.h>
  31#include "mdt.h"
  32#include "alloc.h"
  33
  34
  35static inline struct nilfs_inode *
  36nilfs_ifile_map_inode(struct inode *ifile, ino_t ino, struct buffer_head *ibh)
  37{
  38        void *kaddr = kmap(ibh->b_page);
  39        return nilfs_palloc_block_get_entry(ifile, ino, ibh, kaddr);
  40}
  41
  42static inline void nilfs_ifile_unmap_inode(struct inode *ifile, ino_t ino,
  43                                           struct buffer_head *ibh)
  44{
  45        kunmap(ibh->b_page);
  46}
  47
  48int nilfs_ifile_create_inode(struct inode *, ino_t *, struct buffer_head **);
  49int nilfs_ifile_delete_inode(struct inode *, ino_t);
  50int nilfs_ifile_get_inode_block(struct inode *, ino_t, struct buffer_head **);
  51
  52int nilfs_ifile_count_free_inodes(struct inode *, u64 *, u64 *);
  53
  54int nilfs_ifile_read(struct super_block *sb, struct nilfs_root *root,
  55                     size_t inode_size, struct nilfs_inode *raw_inode,
  56                     struct inode **inodep);
  57
  58#endif  /* _NILFS_IFILE_H */
  59