ifile.h

 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
21static inline struct nilfs_inode *
22nilfs_ifile_map_inode(struct inode *ifile, ino_t ino, struct buffer_head *ibh)
23{
24	size_t __offset_in_folio = nilfs_palloc_entry_offset(ifile, ino, ibh);
25
26	return kmap_local_folio(ibh->b_folio, __offset_in_folio);
27}
28
29static inline void nilfs_ifile_unmap_inode(struct nilfs_inode *raw_inode)
30{
31	kunmap_local(raw_inode);
32}
33
34int nilfs_ifile_create_inode(struct inode *, ino_t *, struct buffer_head **);
35int nilfs_ifile_delete_inode(struct inode *, ino_t);
36int nilfs_ifile_get_inode_block(struct inode *, ino_t, struct buffer_head **);
37
38int nilfs_ifile_count_free_inodes(struct inode *, u64 *, u64 *);
39
40int nilfs_ifile_read(struct super_block *sb, struct nilfs_root *root,
41		     __u64 cno, size_t inode_size);
42
43#endif	/* _NILFS_IFILE_H */