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