projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| ccd979bd MF |
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 | ||
| 83418978 MF |
28 | struct ocfs2_extent_map_item { |
| 29 | unsigned int ei_cpos; | |
| 30 | unsigned int ei_phys; | |
| 31 | unsigned int ei_clusters; | |
| 32 | unsigned int ei_flags; | |
| 33 | ||
| 34 | struct list_head ei_list; | |
| 35 | }; | |
| 36 | ||
| 37 | #define OCFS2_MAX_EXTENT_MAP_ITEMS 3 | |
| 38 | struct ocfs2_extent_map { | |
| 39 | unsigned int em_num_items; | |
| 40 | struct list_head em_list; | |
| 41 | }; | |
| 42 | ||
| 43 | void ocfs2_extent_map_init(struct inode *inode); | |
| 44 | void ocfs2_extent_map_trunc(struct inode *inode, unsigned int cluster); | |
| 45 | void ocfs2_extent_map_insert_rec(struct inode *inode, | |
| 46 | struct ocfs2_extent_rec *rec); | |
| 47 | ||
| 9517bac6 | 48 | int ocfs2_get_clusters(struct inode *inode, u32 v_cluster, u32 *p_cluster, |
| 49cb8d2d | 49 | u32 *num_clusters, unsigned int *extent_flags); |
| 363041a5 | 50 | int ocfs2_extent_map_get_blocks(struct inode *inode, u64 v_blkno, u64 *p_blkno, |
| 4f902c37 | 51 | u64 *ret_count, unsigned int *extent_flags); |
| ccd979bd MF |
52 | |
| 53 | #endif /* _EXTENT_MAP_H */ |