| /* -*- mode: c; c-basic-offset: 8; -*- |
| * vim: noexpandtab sw=8 ts=8 sts=0: |
| * |
| * extent_map.h |
| * |
| * In-memory file extent mappings for OCFS2. |
| * |
| * Copyright (C) 2004 Oracle. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public |
| * License, version 2, as published by the Free Software Foundation. |
| * |
| * 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., 59 Temple Place - Suite 330, |
| * Boston, MA 021110-1307, USA. |
| */ |
| |
| #ifndef _EXTENT_MAP_H |
| #define _EXTENT_MAP_H |
| |
| int init_ocfs2_extent_maps(void); |
| void exit_ocfs2_extent_maps(void); |
| |
| /* |
| * EVERY CALL here except _init, _trunc, and _drop expects alloc_sem |
| * to be held. The allocation cannot change at all while the map is |
| * in the process of being updated. |
| */ |
| int ocfs2_extent_map_init(struct inode *inode); |
| int ocfs2_extent_map_append(struct inode *inode, |
| struct ocfs2_extent_rec *rec, |
| u32 new_clusters); |
| int ocfs2_extent_map_get_blocks(struct inode *inode, |
| u64 v_blkno, int count, |
| u64 *p_blkno, int *ret_count); |
| int ocfs2_extent_map_drop(struct inode *inode, u32 new_clusters); |
| int ocfs2_extent_map_trunc(struct inode *inode, u32 new_clusters); |
| |
| #endif /* _EXTENT_MAP_H */ |
