mirror of https://gitee.com/openkylin/linux.git
56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
/*
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* btnode.h - NILFS B-tree node cache
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*
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* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Written by Seiji Kihara.
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* Revised by Ryusuke Konishi.
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*/
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#ifndef _NILFS_BTNODE_H
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#define _NILFS_BTNODE_H
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#include <linux/types.h>
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#include <linux/buffer_head.h>
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#include <linux/fs.h>
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#include <linux/backing-dev.h>
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/**
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* struct nilfs_btnode_chkey_ctxt - change key context
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* @oldkey: old key of block's moving content
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* @newkey: new key for block's content
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* @bh: buffer head of old buffer
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* @newbh: buffer head of new buffer
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*/
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struct nilfs_btnode_chkey_ctxt {
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__u64 oldkey;
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__u64 newkey;
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struct buffer_head *bh;
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struct buffer_head *newbh;
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};
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void nilfs_btnode_cache_clear(struct address_space *);
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struct buffer_head *nilfs_btnode_create_block(struct address_space *btnc,
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__u64 blocknr);
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int nilfs_btnode_submit_block(struct address_space *, __u64, sector_t, int,
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struct buffer_head **, sector_t *);
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void nilfs_btnode_delete(struct buffer_head *);
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int nilfs_btnode_prepare_change_key(struct address_space *,
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struct nilfs_btnode_chkey_ctxt *);
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void nilfs_btnode_commit_change_key(struct address_space *,
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struct nilfs_btnode_chkey_ctxt *);
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void nilfs_btnode_abort_change_key(struct address_space *,
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struct nilfs_btnode_chkey_ctxt *);
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#endif /* _NILFS_BTNODE_H */
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