| Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame^] | 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 | |
| 28 | int init_ocfs2_extent_maps(void); |
| 29 | void 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 | */ |
| 36 | int ocfs2_extent_map_init(struct inode *inode); |
| 37 | int ocfs2_extent_map_append(struct inode *inode, |
| 38 | struct ocfs2_extent_rec *rec, |
| 39 | u32 new_clusters); |
| 40 | int ocfs2_extent_map_get_blocks(struct inode *inode, |
| 41 | u64 v_blkno, int count, |
| 42 | u64 *p_blkno, int *ret_count); |
| 43 | int ocfs2_extent_map_drop(struct inode *inode, u32 new_clusters); |
| 44 | int ocfs2_extent_map_trunc(struct inode *inode, u32 new_clusters); |
| 45 | |
| 46 | #endif /* _EXTENT_MAP_H */ |