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  * Written by Amagai Yoshiji.
  17  * Revised by Ryusuke Konishi.
  18  *
  19  */
  20
  21 #ifndef _NILFS_IFILE_H
  22 #define _NILFS_IFILE_H
  23
  24 #include <linux/fs.h>
  25 #include <linux/buffer_head.h>
  26 #include <linux/nilfs2_fs.h>
  27 #include "mdt.h"
  28 #include "alloc.h"
  29
  30
  31 static inline struct nilfs_inode *
  32 nilfs_ifile_map_inode(struct inode *ifile, ino_t ino, struct buffer_head *ibh)
  33 {
  34         void *kaddr = kmap(ibh->b_page);
  35
  36         return nilfs_palloc_block_get_entry(ifile, ino, ibh, kaddr);
  37 }
  38
  39 static inline void nilfs_ifile_unmap_inode(struct inode *ifile, ino_t ino,
  40                                            struct buffer_head *ibh)
  41 {
  42         kunmap(ibh->b_page);
  43 }
  44
  45 int nilfs_ifile_create_inode(struct inode *, ino_t *, struct buffer_head **);
  46 int nilfs_ifile_delete_inode(struct inode *, ino_t);
  47 int nilfs_ifile_get_inode_block(struct inode *, ino_t, struct buffer_head **);
  48
  49 int nilfs_ifile_count_free_inodes(struct inode *, u64 *, u64 *);
  50
  51 int nilfs_ifile_read(struct super_block *sb, struct nilfs_root *root,
  52                      size_t inode_size, struct nilfs_inode *raw_inode,
  53                      struct inode **inodep);
  54
  55 #endif  /* _NILFS_IFILE_H */