btrfs.h
2.41 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
/*
* BTRFS filesystem implementation for U-Boot
*
* 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __BTRFS_BTRFS_H__
#define __BTRFS_BTRFS_H__
#include <linux/rbtree.h>
#include "conv-funcs.h"
struct btrfs_info {
struct btrfs_super_block sb;
struct btrfs_root_backup *root_backup;
struct btrfs_root tree_root;
struct btrfs_root fs_root;
struct btrfs_root chunk_root;
struct rb_root chunks_root;
};
extern struct btrfs_info btrfs_info;
/* hash.c */
void btrfs_hash_init(void);
u32 btrfs_crc32c(u32, const void *, size_t);
u32 btrfs_csum_data(char *, u32, size_t);
void btrfs_csum_final(u32, void *);
static inline u64 btrfs_name_hash(const char *name, int len)
{
return btrfs_crc32c((u32) ~1, name, len);
}
/* dev.c */
extern struct blk_desc *btrfs_blk_desc;
extern disk_partition_t *btrfs_part_info;
int btrfs_devread(u64, int, void *);
/* chunk-map.c */
u64 btrfs_map_logical_to_physical(u64);
int btrfs_chunk_map_init(void);
void btrfs_chunk_map_exit(void);
int btrfs_read_chunk_tree(void);
/* compression.c */
u32 btrfs_decompress(u8 type, const char *, u32, char *, u32);
/* super.c */
int btrfs_read_superblock(void);
/* dir-item.c */
typedef int (*btrfs_readdir_callback_t)(const struct btrfs_root *,
struct btrfs_dir_item *);
int btrfs_lookup_dir_item(const struct btrfs_root *, u64, const char *, int,
struct btrfs_dir_item *);
int btrfs_readdir(const struct btrfs_root *, u64, btrfs_readdir_callback_t);
/* root.c */
int btrfs_find_root(u64, struct btrfs_root *, struct btrfs_root_item *);
u64 btrfs_lookup_root_ref(u64, struct btrfs_root_ref *, char *);
/* inode.c */
u64 btrfs_lookup_inode_ref(struct btrfs_root *, u64, struct btrfs_inode_ref *,
char *);
int btrfs_lookup_inode(const struct btrfs_root *, struct btrfs_key *,
struct btrfs_inode_item *, struct btrfs_root *);
int btrfs_readlink(const struct btrfs_root *, u64, char *);
u64 btrfs_lookup_path(struct btrfs_root *, u64, const char *, u8 *,
struct btrfs_inode_item *, int);
u64 btrfs_file_read(const struct btrfs_root *, u64, u64, u64, char *);
/* subvolume.c */
u64 btrfs_get_default_subvol_objectid(void);
/* extent-io.c */
u64 btrfs_read_extent_inline(struct btrfs_path *,
struct btrfs_file_extent_item *, u64, u64,
char *);
u64 btrfs_read_extent_reg(struct btrfs_path *, struct btrfs_file_extent_item *,
u64, u64, char *);
#endif /* !__BTRFS_BTRFS_H__ */