xref: /openbmc/linux/fs/nilfs2/ifile.h (revision 2a598d0b)
1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * NILFS inode file
4  *
5  * Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
6  *
7  * Written by Amagai Yoshiji.
8  * Revised by Ryusuke Konishi.
9  *
10  */
11 
12 #ifndef _NILFS_IFILE_H
13 #define _NILFS_IFILE_H
14 
15 #include <linux/fs.h>
16 #include <linux/buffer_head.h>
17 #include "mdt.h"
18 #include "alloc.h"
19 
20 
21 static inline struct nilfs_inode *
22 nilfs_ifile_map_inode(struct inode *ifile, ino_t ino, struct buffer_head *ibh)
23 {
24 	void *kaddr = kmap(ibh->b_page);
25 
26 	return nilfs_palloc_block_get_entry(ifile, ino, ibh, kaddr);
27 }
28 
29 static inline void nilfs_ifile_unmap_inode(struct inode *ifile, ino_t ino,
30 					   struct buffer_head *ibh)
31 {
32 	kunmap(ibh->b_page);
33 }
34 
35 int nilfs_ifile_create_inode(struct inode *, ino_t *, struct buffer_head **);
36 int nilfs_ifile_delete_inode(struct inode *, ino_t);
37 int nilfs_ifile_get_inode_block(struct inode *, ino_t, struct buffer_head **);
38 
39 int nilfs_ifile_count_free_inodes(struct inode *, u64 *, u64 *);
40 
41 int nilfs_ifile_read(struct super_block *sb, struct nilfs_root *root,
42 		     size_t inode_size, struct nilfs_inode *raw_inode,
43 		     struct inode **inodep);
44 
45 #endif	/* _NILFS_IFILE_H */
46