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
  35 static inline struct nilfs_inode *
  36 nilfs_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
  42 static 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
  48 int nilfs_ifile_create_inode(struct inode *, ino_t *, struct buffer_head **);
  49 int nilfs_ifile_delete_inode(struct inode *, ino_t);
  50 int nilfs_ifile_get_inode_block(struct inode *, ino_t, struct buffer_head **);
  51
  52 int nilfs_ifile_count_free_inodes(struct inode *, u64 *, u64 *);
  53
  54 int 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 */