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Linux/fs/nilfs2/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  * Written by Amagai Yoshiji.
 17  * Revised by Ryusuke Konishi.
 18  *
 19  */
 20 
 21 #ifndef _NILFS_IFILE_H
 22 #define _NILFS_IFILE_H
 23 
 24 #include <linux/fs.h>
 25 #include <linux/buffer_head.h>
 26 #include "mdt.h"
 27 #include "alloc.h"
 28 
 29 
 30 static inline struct nilfs_inode *
 31 nilfs_ifile_map_inode(struct inode *ifile, ino_t ino, struct buffer_head *ibh)
 32 {
 33         void *kaddr = kmap(ibh->b_page);
 34 
 35         return nilfs_palloc_block_get_entry(ifile, ino, ibh, kaddr);
 36 }
 37 
 38 static inline void nilfs_ifile_unmap_inode(struct inode *ifile, ino_t ino,
 39                                            struct buffer_head *ibh)
 40 {
 41         kunmap(ibh->b_page);
 42 }
 43 
 44 int nilfs_ifile_create_inode(struct inode *, ino_t *, struct buffer_head **);
 45 int nilfs_ifile_delete_inode(struct inode *, ino_t);
 46 int nilfs_ifile_get_inode_block(struct inode *, ino_t, struct buffer_head **);
 47 
 48 int nilfs_ifile_count_free_inodes(struct inode *, u64 *, u64 *);
 49 
 50 int nilfs_ifile_read(struct super_block *sb, struct nilfs_root *root,
 51                      size_t inode_size, struct nilfs_inode *raw_inode,
 52                      struct inode **inodep);
 53 
 54 #endif  /* _NILFS_IFILE_H */
 55 

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