1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * btnode.h - 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_btnode_cache_clear(struct address_space *); 34 struct buffer_head *nilfs_btnode_create_block(struct address_space *btnc, 35 __u64 blocknr); 36 int nilfs_btnode_submit_block(struct address_space *, __u64, sector_t, int, 37 int, struct buffer_head **, sector_t *); 38 void nilfs_btnode_delete(struct buffer_head *); 39 int nilfs_btnode_prepare_change_key(struct address_space *, 40 struct nilfs_btnode_chkey_ctxt *); 41 void nilfs_btnode_commit_change_key(struct address_space *, 42 struct nilfs_btnode_chkey_ctxt *); 43 void nilfs_btnode_abort_change_key(struct address_space *, 44 struct nilfs_btnode_chkey_ctxt *); 45 46 #endif /* _NILFS_BTNODE_H */ 47