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ifile.h
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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 <[email protected]>
21  * Revised by Ryusuke Konishi <[email protected]>
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_read(struct super_block *sb, struct nilfs_root *root,
53  size_t inode_size, struct nilfs_inode *raw_inode,
54  struct inode **inodep);
55 
56 #endif /* _NILFS_IFILE_H */