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 struct btrfs_root_backup *root_backup; 17 18 struct btrfs_root tree_root; 19 struct btrfs_root fs_root; 20 struct btrfs_root chunk_root; 21 22 struct rb_root chunks_root; 23 }; 24 25 extern struct btrfs_info btrfs_info; 26 27 /* hash.c */ 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 *); 32 33 static inline u64 btrfs_name_hash(const char *name, int len) 34 { 35 return btrfs_crc32c((u32) ~1, name, len); 36 } 37 38 /* dev.c */ 39 extern struct blk_desc *btrfs_blk_desc; 40 extern disk_partition_t *btrfs_part_info; 41 42 int btrfs_devread(u64, int, void *); 43 44 /* chunk-map.c */ 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); 49 50 /* compression.c */ 51 u32 btrfs_decompress(u8 type, const char *, u32, char *, u32); 52 53 /* super.c */ 54 int btrfs_read_superblock(void); 55 56 /* dir-item.c */ 57 typedef int (*btrfs_readdir_callback_t)(const struct btrfs_root *, 58 struct btrfs_dir_item *); 59 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); 63 64 /* root.c */ 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 *); 67 68 /* inode.c */ 69 u64 btrfs_lookup_inode_ref(struct btrfs_root *, u64, struct btrfs_inode_ref *, 70 char *); 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 *); 77 78 /* subvolume.c */ 79 u64 btrfs_get_default_subvol_objectid(void); 80 81 /* extent-io.c */ 82 u64 btrfs_read_extent_inline(struct btrfs_path *, 83 struct btrfs_file_extent_item *, u64, u64, 84 char *); 85 u64 btrfs_read_extent_reg(struct btrfs_path *, struct btrfs_file_extent_item *, 86 u64, u64, char *); 87 88 #endif /* !__BTRFS_BTRFS_H__ */ 89