fs/nilfs2/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
  21 static inline struct nilfs_inode *
  22 nilfs_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
  29 static inline void nilfs_ifile_unmap_inode(struct nilfs_inode *raw_inode)
  30 {
  31         kunmap_local(raw_inode);
  32 }
  33
  34 int nilfs_ifile_create_inode(struct inode *, ino_t *, struct buffer_head **);
  35 int nilfs_ifile_delete_inode(struct inode *, ino_t);
  36 int nilfs_ifile_get_inode_block(struct inode *, ino_t, struct buffer_head **);
  37
  38 int nilfs_ifile_count_free_inodes(struct inode *, u64 *, u64 *);
  39
  40 int nilfs_ifile_read(struct super_block *sb, struct nilfs_root *root,
  41                      __u64 cno, size_t inode_size);
  42
  43 #endif  /* _NILFS_IFILE_H */