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/* SPDX-License-Identifier: GPL-2.0+ */
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/*
* btnode . h - NILFS B - tree node cache
*
* Copyright ( C ) 2005 - 2008 Nippon Telegraph and Telephone Corporation .
*
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* Written by Seiji Kihara .
* Revised by Ryusuke Konishi .
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*/
# ifndef _NILFS_BTNODE_H
# define _NILFS_BTNODE_H
# include <linux/types.h>
# include <linux/buffer_head.h>
# include <linux/fs.h>
# include <linux/backing-dev.h>
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/**
* struct nilfs_btnode_chkey_ctxt - change key context
* @ oldkey : old key of block ' s moving content
* @ newkey : new key for block ' s content
* @ bh : buffer head of old buffer
* @ newbh : buffer head of new buffer
*/
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struct nilfs_btnode_chkey_ctxt {
__u64 oldkey ;
__u64 newkey ;
struct buffer_head * bh ;
struct buffer_head * newbh ;
} ;
void nilfs_btnode_cache_clear ( struct address_space * ) ;
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struct buffer_head * nilfs_btnode_create_block ( struct address_space * btnc ,
__u64 blocknr ) ;
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int nilfs_btnode_submit_block ( struct address_space * , __u64 , sector_t , int ,
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int , struct buffer_head * * , sector_t * ) ;
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void nilfs_btnode_delete ( struct buffer_head * ) ;
int nilfs_btnode_prepare_change_key ( struct address_space * ,
struct nilfs_btnode_chkey_ctxt * ) ;
void nilfs_btnode_commit_change_key ( struct address_space * ,
struct nilfs_btnode_chkey_ctxt * ) ;
void nilfs_btnode_abort_change_key ( struct address_space * ,
struct nilfs_btnode_chkey_ctxt * ) ;
# endif /* _NILFS_BTNODE_H */