fs/nilfs2/ifile.h

0001 /* SPDX-License-Identifier: GPL-2.0+ */
0002 /*
0003  * NILFS inode file
0004  *
0005  * Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
0006  *
0007  * Written by Amagai Yoshiji.
0008  * Revised by Ryusuke Konishi.
0009  *
0010  */
0011
0012 #ifndef _NILFS_IFILE_H
0013 #define _NILFS_IFILE_H
0014
0015 #include <linux/fs.h>
0016 #include <linux/buffer_head.h>
0017 #include "mdt.h"
0018 #include "alloc.h"
0019
0020
0021 static inline struct nilfs_inode *
0022 nilfs_ifile_map_inode(struct inode *ifile, ino_t ino, struct buffer_head *ibh)
0023 {
0024     void *kaddr = kmap(ibh->b_page);
0025
0026     return nilfs_palloc_block_get_entry(ifile, ino, ibh, kaddr);
0027 }
0028
0029 static inline void nilfs_ifile_unmap_inode(struct inode *ifile, ino_t ino,
0030                        struct buffer_head *ibh)
0031 {
0032     kunmap(ibh->b_page);
0033 }
0034
0035 int nilfs_ifile_create_inode(struct inode *, ino_t *, struct buffer_head **);
0036 int nilfs_ifile_delete_inode(struct inode *, ino_t);
0037 int nilfs_ifile_get_inode_block(struct inode *, ino_t, struct buffer_head **);
0038
0039 int nilfs_ifile_count_free_inodes(struct inode *, u64 *, u64 *);
0040
0041 int nilfs_ifile_read(struct super_block *sb, struct nilfs_root *root,
0042              size_t inode_size, struct nilfs_inode *raw_inode,
0043              struct inode **inodep);
0044
0045 #endif  /* _NILFS_IFILE_H */