From a60be987d45dd510aeb54389526f9957cfab106c Mon Sep 17 00:00:00 2001 From: Ryusuke Konishi Date: Mon, 6 Apr 2009 19:01:25 -0700 Subject: nilfs2: B-tree node cache This adds routines for B-tree node buffers. Signed-off-by: Seiji Kihara Signed-off-by: Ryusuke Konishi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nilfs2/btnode.h | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 fs/nilfs2/btnode.h (limited to 'fs/nilfs2/btnode.h') diff --git a/fs/nilfs2/btnode.h b/fs/nilfs2/btnode.h new file mode 100644 index 000000000000..35faa86444a7 --- /dev/null +++ b/fs/nilfs2/btnode.h @@ -0,0 +1,58 @@ +/* + * btnode.h - NILFS B-tree node cache + * + * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + * Written by Seiji Kihara + * Revised by Ryusuke Konishi + */ + +#ifndef _NILFS_BTNODE_H +#define _NILFS_BTNODE_H + +#include +#include +#include +#include + + +struct nilfs_btnode_chkey_ctxt { + __u64 oldkey; + __u64 newkey; + struct buffer_head *bh; + struct buffer_head *newbh; +}; + +void nilfs_btnode_cache_init_once(struct address_space *); +void nilfs_btnode_cache_init(struct address_space *); +void nilfs_btnode_cache_clear(struct address_space *); +int nilfs_btnode_submit_block(struct address_space *, __u64, sector_t, + struct buffer_head **, int); +int nilfs_btnode_get(struct address_space *, __u64, sector_t, + struct buffer_head **, int); +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 *); + +#define nilfs_btnode_mark_dirty(bh) nilfs_mark_buffer_dirty(bh) + + +#endif /* _NILFS_BTNODE_H */ -- cgit v1.2.3