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Tom Rini83d290c2018-05-06 17:58:06 -04001/* SPDX-License-Identifier: GPL-2.0+ */
Marek Behún21a14fa2017-09-03 17:00:28 +02002/*
3 * BTRFS filesystem implementation for U-Boot
4 *
5 * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
Marek Behún21a14fa2017-09-03 17:00:28 +02006 */
7
8#ifndef __BTRFS_BTRFS_H__
9#define __BTRFS_BTRFS_H__
10
11#include <linux/rbtree.h>
12#include "conv-funcs.h"
13
14struct btrfs_info {
15 struct btrfs_super_block sb;
Marek Behún21a14fa2017-09-03 17:00:28 +020016
17 struct btrfs_root tree_root;
18 struct btrfs_root fs_root;
19 struct btrfs_root chunk_root;
20
21 struct rb_root chunks_root;
22};
23
24extern struct btrfs_info btrfs_info;
25
26/* hash.c */
27void btrfs_hash_init(void);
28u32 btrfs_crc32c(u32, const void *, size_t);
29u32 btrfs_csum_data(char *, u32, size_t);
30void btrfs_csum_final(u32, void *);
31
32static inline u64 btrfs_name_hash(const char *name, int len)
33{
34 return btrfs_crc32c((u32) ~1, name, len);
35}
36
37/* dev.c */
38extern struct blk_desc *btrfs_blk_desc;
39extern disk_partition_t *btrfs_part_info;
40
41int btrfs_devread(u64, int, void *);
42
43/* chunk-map.c */
44u64 btrfs_map_logical_to_physical(u64);
45int btrfs_chunk_map_init(void);
46void btrfs_chunk_map_exit(void);
47int btrfs_read_chunk_tree(void);
48
49/* compression.c */
50u32 btrfs_decompress(u8 type, const char *, u32, char *, u32);
51
52/* super.c */
53int btrfs_read_superblock(void);
54
55/* dir-item.c */
56typedef int (*btrfs_readdir_callback_t)(const struct btrfs_root *,
57 struct btrfs_dir_item *);
58
59int btrfs_lookup_dir_item(const struct btrfs_root *, u64, const char *, int,
60 struct btrfs_dir_item *);
61int btrfs_readdir(const struct btrfs_root *, u64, btrfs_readdir_callback_t);
62
63/* root.c */
64int btrfs_find_root(u64, struct btrfs_root *, struct btrfs_root_item *);
65u64 btrfs_lookup_root_ref(u64, struct btrfs_root_ref *, char *);
66
67/* inode.c */
68u64 btrfs_lookup_inode_ref(struct btrfs_root *, u64, struct btrfs_inode_ref *,
69 char *);
70int btrfs_lookup_inode(const struct btrfs_root *, struct btrfs_key *,
71 struct btrfs_inode_item *, struct btrfs_root *);
72int btrfs_readlink(const struct btrfs_root *, u64, char *);
73u64 btrfs_lookup_path(struct btrfs_root *, u64, const char *, u8 *,
74 struct btrfs_inode_item *, int);
75u64 btrfs_file_read(const struct btrfs_root *, u64, u64, u64, char *);
76
77/* subvolume.c */
78u64 btrfs_get_default_subvol_objectid(void);
79
80/* extent-io.c */
81u64 btrfs_read_extent_inline(struct btrfs_path *,
82 struct btrfs_file_extent_item *, u64, u64,
83 char *);
84u64 btrfs_read_extent_reg(struct btrfs_path *, struct btrfs_file_extent_item *,
85 u64, u64, char *);
86
87#endif /* !__BTRFS_BTRFS_H__ */