]>
Commit | Line | Data |
---|---|---|
921a3d4d | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
ccd979bd MF |
2 | /* -*- mode: c; c-basic-offset: 8; -*- |
3 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
4 | * | |
5 | * extent_map.h | |
6 | * | |
7 | * In-memory file extent mappings for OCFS2. | |
8 | * | |
9 | * Copyright (C) 2004 Oracle. All rights reserved. | |
ccd979bd MF |
10 | */ |
11 | ||
12 | #ifndef _EXTENT_MAP_H | |
13 | #define _EXTENT_MAP_H | |
14 | ||
83418978 MF |
15 | struct ocfs2_extent_map_item { |
16 | unsigned int ei_cpos; | |
17 | unsigned int ei_phys; | |
18 | unsigned int ei_clusters; | |
19 | unsigned int ei_flags; | |
20 | ||
21 | struct list_head ei_list; | |
22 | }; | |
23 | ||
24 | #define OCFS2_MAX_EXTENT_MAP_ITEMS 3 | |
25 | struct ocfs2_extent_map { | |
26 | unsigned int em_num_items; | |
27 | struct list_head em_list; | |
28 | }; | |
29 | ||
30 | void ocfs2_extent_map_init(struct inode *inode); | |
31 | void ocfs2_extent_map_trunc(struct inode *inode, unsigned int cluster); | |
32 | void ocfs2_extent_map_insert_rec(struct inode *inode, | |
33 | struct ocfs2_extent_rec *rec); | |
34 | ||
9517bac6 | 35 | int ocfs2_get_clusters(struct inode *inode, u32 v_cluster, u32 *p_cluster, |
49cb8d2d | 36 | u32 *num_clusters, unsigned int *extent_flags); |
363041a5 | 37 | int ocfs2_extent_map_get_blocks(struct inode *inode, u64 v_blkno, u64 *p_blkno, |
4f902c37 | 38 | u64 *ret_count, unsigned int *extent_flags); |
ccd979bd | 39 | |
00dc417f MF |
40 | int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
41 | u64 map_start, u64 map_len); | |
42 | ||
ac604d3c GH |
43 | int ocfs2_overwrite_io(struct inode *inode, struct buffer_head *di_bh, |
44 | u64 map_start, u64 map_len); | |
45 | ||
93862d5e SM |
46 | int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int origin); |
47 | ||
f56654c4 TM |
48 | int ocfs2_xattr_get_clusters(struct inode *inode, u32 v_cluster, |
49 | u32 *p_cluster, u32 *num_clusters, | |
1061f9c1 TM |
50 | struct ocfs2_extent_list *el, |
51 | unsigned int *extent_flags); | |
f56654c4 | 52 | |
a8549fb5 JB |
53 | int ocfs2_read_virt_blocks(struct inode *inode, u64 v_block, int nr, |
54 | struct buffer_head *bhs[], int flags, | |
55 | int (*validate)(struct super_block *sb, | |
56 | struct buffer_head *bh)); | |
e73a819d TM |
57 | int ocfs2_figure_hole_clusters(struct ocfs2_caching_info *ci, |
58 | struct ocfs2_extent_list *el, | |
59 | struct buffer_head *eb_bh, | |
60 | u32 v_cluster, | |
61 | u32 *num_clusters); | |
a8549fb5 JB |
62 | static inline int ocfs2_read_virt_block(struct inode *inode, u64 v_block, |
63 | struct buffer_head **bh, | |
64 | int (*validate)(struct super_block *sb, | |
65 | struct buffer_head *bh)) | |
66 | { | |
67 | int status = 0; | |
68 | ||
69 | if (bh == NULL) { | |
70 | printk("ocfs2: bh == NULL\n"); | |
71 | status = -EINVAL; | |
72 | goto bail; | |
73 | } | |
74 | ||
75 | status = ocfs2_read_virt_blocks(inode, v_block, 1, bh, 0, validate); | |
76 | ||
77 | bail: | |
78 | return status; | |
79 | } | |
80 | ||
81 | ||
ccd979bd | 82 | #endif /* _EXTENT_MAP_H */ |