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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 | ||
ac604d3c GH |
56 | int ocfs2_overwrite_io(struct inode *inode, struct buffer_head *di_bh, |
57 | u64 map_start, u64 map_len); | |
58 | ||
93862d5e SM |
59 | int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int origin); |
60 | ||
f56654c4 TM |
61 | int ocfs2_xattr_get_clusters(struct inode *inode, u32 v_cluster, |
62 | u32 *p_cluster, u32 *num_clusters, | |
1061f9c1 TM |
63 | struct ocfs2_extent_list *el, |
64 | unsigned int *extent_flags); | |
f56654c4 | 65 | |
a8549fb5 JB |
66 | int ocfs2_read_virt_blocks(struct inode *inode, u64 v_block, int nr, |
67 | struct buffer_head *bhs[], int flags, | |
68 | int (*validate)(struct super_block *sb, | |
69 | struct buffer_head *bh)); | |
e73a819d TM |
70 | int ocfs2_figure_hole_clusters(struct ocfs2_caching_info *ci, |
71 | struct ocfs2_extent_list *el, | |
72 | struct buffer_head *eb_bh, | |
73 | u32 v_cluster, | |
74 | u32 *num_clusters); | |
a8549fb5 JB |
75 | static inline int ocfs2_read_virt_block(struct inode *inode, u64 v_block, |
76 | struct buffer_head **bh, | |
77 | int (*validate)(struct super_block *sb, | |
78 | struct buffer_head *bh)) | |
79 | { | |
80 | int status = 0; | |
81 | ||
82 | if (bh == NULL) { | |
83 | printk("ocfs2: bh == NULL\n"); | |
84 | status = -EINVAL; | |
85 | goto bail; | |
86 | } | |
87 | ||
88 | status = ocfs2_read_virt_blocks(inode, v_block, 1, bh, 0, validate); | |
89 | ||
90 | bail: | |
91 | return status; | |
92 | } | |
93 | ||
94 | ||
ccd979bd | 95 | #endif /* _EXTENT_MAP_H */ |