From bdb265eae08db578e7cf5739be16f389d495fc75 Mon Sep 17 00:00:00 2001 From: Koji Sato Date: Mon, 6 Apr 2009 19:01:23 -0700 Subject: nilfs2: integrated block mapping This adds structures and operations for the block mapping (bmap for short). NILFS2 uses direct mappings for short files or B-tree based mappings for longer files. Every on-disk data block is held with inodes and managed through this block mapping. The nilfs_bmap structure and a set of functions here provide this capability to the NILFS2 inode. [penberg@cs.helsinki.fi: remove a bunch of bmap wrapper macros] [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Koji Sato Signed-off-by: Ryusuke Konishi Signed-off-by: Pekka Enberg Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/nilfs2/bmap_union.h | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 fs/nilfs2/bmap_union.h (limited to 'fs/nilfs2/bmap_union.h') diff --git a/fs/nilfs2/bmap_union.h b/fs/nilfs2/bmap_union.h new file mode 100644 index 00000000000..d41509bff47 --- /dev/null +++ b/fs/nilfs2/bmap_union.h @@ -0,0 +1,42 @@ +/* + * bmap_union.h - NILFS block mapping. + * + * Copyright (C) 2006-2008 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 Koji Sato . + */ + +#ifndef _NILFS_BMAP_UNION_H +#define _NILFS_BMAP_UNION_H + +#include "bmap.h" +#include "direct.h" +#include "btree.h" + +/** + * nilfs_bmap_union - + * @bi_bmap: bmap structure + * @bi_btree: direct map structure + * @bi_direct: B-tree structure + */ +union nilfs_bmap_union { + struct nilfs_bmap bi_bmap; + struct nilfs_direct bi_direct; + struct nilfs_btree bi_btree; +}; + +#endif /* _NILFS_BMAP_UNION_H */ -- cgit v1.2.3