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 | 52 | |
| 00dc417f MF |
53 | int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
| 54 | u64 map_start, u64 map_len); | |
| 55 | ||
| 93862d5e SM |
56 | int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int origin); |
| 57 | ||
| f56654c4 TM |
58 | int ocfs2_xattr_get_clusters(struct inode *inode, u32 v_cluster, |
| 59 | u32 *p_cluster, u32 *num_clusters, | |
| 1061f9c1 TM |
60 | struct ocfs2_extent_list *el, |
| 61 | unsigned int *extent_flags); | |
| f56654c4 | 62 | |
| a8549fb5 JB |
63 | int ocfs2_read_virt_blocks(struct inode *inode, u64 v_block, int nr, |
| 64 | struct buffer_head *bhs[], int flags, | |
| 65 | int (*validate)(struct super_block *sb, | |
| 66 | struct buffer_head *bh)); | |
| e73a819d TM |
67 | int ocfs2_figure_hole_clusters(struct ocfs2_caching_info *ci, |
| 68 | struct ocfs2_extent_list *el, | |
| 69 | struct buffer_head *eb_bh, | |
| 70 | u32 v_cluster, | |
| 71 | u32 *num_clusters); | |
| a8549fb5 JB |
72 | static inline int ocfs2_read_virt_block(struct inode *inode, u64 v_block, |
| 73 | struct buffer_head **bh, | |
| 74 | int (*validate)(struct super_block *sb, | |
| 75 | struct buffer_head *bh)) | |
| 76 | { | |
| 77 | int status = 0; | |
| 78 | ||
| 79 | if (bh == NULL) { | |
| 80 | printk("ocfs2: bh == NULL\n"); | |
| 81 | status = -EINVAL; | |
| 82 | goto bail; | |
| 83 | } | |
| 84 | ||
| 85 | status = ocfs2_read_virt_blocks(inode, v_block, 1, bh, 0, validate); | |
| 86 | ||
| 87 | bail: | |
| 88 | return status; | |
| 89 | } | |
| 90 | ||
| 91 | ||
| ccd979bd | 92 | #endif /* _EXTENT_MAP_H */ |