1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * NILFS B-tree node cache 4 * 5 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation. 6 * 7 * Written by Seiji Kihara. 8 * Revised by Ryusuke Konishi. 9 */ 10 11 #ifndef _NILFS_BTNODE_H 12 #define _NILFS_BTNODE_H 13 14 #include <linux/types.h> 15 #include <linux/buffer_head.h> 16 #include <linux/fs.h> 17 #include <linux/backing-dev.h> 18 19 /** 20 * struct nilfs_btnode_chkey_ctxt - change key context 21 * @oldkey: old key of block's moving content 22 * @newkey: new key for block's content 23 * @bh: buffer head of old buffer 24 * @newbh: buffer head of new buffer 25 */ 26 struct nilfs_btnode_chkey_ctxt { 27 __u64 oldkey; 28 __u64 newkey; 29 struct buffer_head *bh; 30 struct buffer_head *newbh; 31 }; 32 33 void nilfs_init_btnc_inode(struct inode *btnc_inode); 34 void nilfs_btnode_cache_clear(struct address_space *); 35 struct buffer_head *nilfs_btnode_create_block(struct address_space *btnc, 36 __u64 blocknr); 37 int nilfs_btnode_submit_block(struct address_space *, __u64, sector_t, 38 blk_opf_t, struct buffer_head **, sector_t *); 39 void nilfs_btnode_delete(struct buffer_head *); 40 int nilfs_btnode_prepare_change_key(struct address_space *, 41 struct nilfs_btnode_chkey_ctxt *); 42 void nilfs_btnode_commit_change_key(struct address_space *, 43 struct nilfs_btnode_chkey_ctxt *); 44 void nilfs_btnode_abort_change_key(struct address_space *, 45 struct nilfs_btnode_chkey_ctxt *); 46 47 #endif /* _NILFS_BTNODE_H */ 48