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authorMark Fasheh <mark.fasheh@oracle.com>2005-12-15 17:31:24 -0500
committerJoel Becker <joel.becker@oracle.com>2006-01-03 14:45:47 -0500
commitccd979bdbce9fba8412beb3f1de68a9d0171b12c (patch)
treec50ed941849ce06ccadd4ce27599b3ef9fdbe2ae /fs/ocfs2/extent_map.h
parent8df08c89c668e1bd922a053fdb5ba1fadbecbb38 (diff)
[PATCH] OCFS2: The Second Oracle Cluster Filesystem
The OCFS2 file system module. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com> Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com>
Diffstat (limited to 'fs/ocfs2/extent_map.h')
-rw-r--r--fs/ocfs2/extent_map.h46
1 files changed, 46 insertions, 0 deletions
diff --git a/fs/ocfs2/extent_map.h b/fs/ocfs2/extent_map.h
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1/* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * extent_map.h
5 *
6 * In-memory file extent mappings for OCFS2.
7 *
8 * Copyright (C) 2004 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License, version 2, as published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public
20 * License along with this program; if not, write to the
21 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 * Boston, MA 021110-1307, USA.
23 */
24
25#ifndef _EXTENT_MAP_H
26#define _EXTENT_MAP_H
27
28int init_ocfs2_extent_maps(void);
29void exit_ocfs2_extent_maps(void);
30
31/*
32 * EVERY CALL here except _init, _trunc, and _drop expects alloc_sem
33 * to be held. The allocation cannot change at all while the map is
34 * in the process of being updated.
35 */
36int ocfs2_extent_map_init(struct inode *inode);
37int ocfs2_extent_map_append(struct inode *inode,
38 struct ocfs2_extent_rec *rec,
39 u32 new_clusters);
40int ocfs2_extent_map_get_blocks(struct inode *inode,
41 u64 v_blkno, int count,
42 u64 *p_blkno, int *ret_count);
43int ocfs2_extent_map_drop(struct inode *inode, u32 new_clusters);
44int ocfs2_extent_map_trunc(struct inode *inode, u32 new_clusters);
45
46#endif /* _EXTENT_MAP_H */