/* SPDX-License-Identifier: GPL-2.0+ */ /* * NILFS B-tree node cache * * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation. * * Written by Seiji Kihara. * Revised by Ryusuke Konishi. */ #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> /** * 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 */ struct nilfs_btnode_chkey_ctxt { __u64 oldkey; __u64 newkey; struct buffer_head *bh; struct buffer_head *newbh; }; void nilfs_init_btnc_inode(struct inode *btnc_inode); void nilfs_btnode_cache_clear(struct address_space *); struct buffer_head *nilfs_btnode_create_block(struct address_space *btnc, __u64 blocknr); int nilfs_btnode_submit_block(struct address_space *, __u64, sector_t, int, int, struct buffer_head **, sector_t *); 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 */