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 *
nilfs_ifile_map_inode(struct inode * ifile,ino_t ino,struct buffer_head * ibh)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
nilfs_ifile_unmap_inode(struct inode * ifile,ino_t ino,struct buffer_head * ibh)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 */
59