1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * BTRFS filesystem implementation for U-Boot
5 * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
8 #ifndef __BTRFS_BTRFS_H__
9 #define __BTRFS_BTRFS_H__
11 #include <linux/rbtree.h>
12 #include "conv-funcs.h"
15 struct btrfs_super_block sb;
16 struct btrfs_root_backup *root_backup;
18 struct btrfs_root tree_root;
19 struct btrfs_root fs_root;
20 struct btrfs_root chunk_root;
22 struct rb_root chunks_root;
25 extern struct btrfs_info btrfs_info;
28 void btrfs_hash_init(void);
29 u32 btrfs_crc32c(u32, const void *, size_t);
30 u32 btrfs_csum_data(char *, u32, size_t);
31 void btrfs_csum_final(u32, void *);
33 static inline u64 btrfs_name_hash(const char *name, int len)
35 return btrfs_crc32c((u32) ~1, name, len);
39 extern struct blk_desc *btrfs_blk_desc;
40 extern disk_partition_t *btrfs_part_info;
42 int btrfs_devread(u64, int, void *);
45 u64 btrfs_map_logical_to_physical(u64);
46 int btrfs_chunk_map_init(void);
47 void btrfs_chunk_map_exit(void);
48 int btrfs_read_chunk_tree(void);
51 u32 btrfs_decompress(u8 type, const char *, u32, char *, u32);
54 int btrfs_read_superblock(void);
57 typedef int (*btrfs_readdir_callback_t)(const struct btrfs_root *,
58 struct btrfs_dir_item *);
60 int btrfs_lookup_dir_item(const struct btrfs_root *, u64, const char *, int,
61 struct btrfs_dir_item *);
62 int btrfs_readdir(const struct btrfs_root *, u64, btrfs_readdir_callback_t);
65 int btrfs_find_root(u64, struct btrfs_root *, struct btrfs_root_item *);
66 u64 btrfs_lookup_root_ref(u64, struct btrfs_root_ref *, char *);
69 u64 btrfs_lookup_inode_ref(struct btrfs_root *, u64, struct btrfs_inode_ref *,
71 int btrfs_lookup_inode(const struct btrfs_root *, struct btrfs_key *,
72 struct btrfs_inode_item *, struct btrfs_root *);
73 int btrfs_readlink(const struct btrfs_root *, u64, char *);
74 u64 btrfs_lookup_path(struct btrfs_root *, u64, const char *, u8 *,
75 struct btrfs_inode_item *, int);
76 u64 btrfs_file_read(const struct btrfs_root *, u64, u64, u64, char *);
79 u64 btrfs_get_default_subvol_objectid(void);
82 u64 btrfs_read_extent_inline(struct btrfs_path *,
83 struct btrfs_file_extent_item *, u64, u64,
85 u64 btrfs_read_extent_reg(struct btrfs_path *, struct btrfs_file_extent_item *,
88 #endif /* !__BTRFS_BTRFS_H__ */