1 /* 2 * BTRFS filesystem implementation for U-Boot 3 * 4 * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz 5 * 6 * SPDX-License-Identifier: GPL-2.0+ 7 */ 8 9 #ifndef __BTRFS_BTRFS_H__ 10 #define __BTRFS_BTRFS_H__ 11 12 #include <linux/rbtree.h> 13 #include "conv-funcs.h" 14 15 struct btrfs_info { 16 struct btrfs_super_block sb; 17 struct btrfs_root_backup *root_backup; 18 19 struct btrfs_root tree_root; 20 struct btrfs_root fs_root; 21 struct btrfs_root chunk_root; 22 23 struct rb_root chunks_root; 24 }; 25 26 extern struct btrfs_info btrfs_info; 27 28 /* hash.c */ 29 void btrfs_hash_init(void); 30 u32 btrfs_crc32c(u32, const void *, size_t); 31 u32 btrfs_csum_data(char *, u32, size_t); 32 void btrfs_csum_final(u32, void *); 33 34 static inline u64 btrfs_name_hash(const char *name, int len) 35 { 36 return btrfs_crc32c((u32) ~1, name, len); 37 } 38 39 /* dev.c */ 40 extern struct blk_desc *btrfs_blk_desc; 41 extern disk_partition_t *btrfs_part_info; 42 43 int btrfs_devread(u64, int, void *); 44 45 /* chunk-map.c */ 46 u64 btrfs_map_logical_to_physical(u64); 47 int btrfs_chunk_map_init(void); 48 void btrfs_chunk_map_exit(void); 49 int btrfs_read_chunk_tree(void); 50 51 /* compression.c */ 52 u32 btrfs_decompress(u8 type, const char *, u32, char *, u32); 53 54 /* super.c */ 55 int btrfs_read_superblock(void); 56 57 /* dir-item.c */ 58 typedef int (*btrfs_readdir_callback_t)(const struct btrfs_root *, 59 struct btrfs_dir_item *); 60 61 int btrfs_lookup_dir_item(const struct btrfs_root *, u64, const char *, int, 62 struct btrfs_dir_item *); 63 int btrfs_readdir(const struct btrfs_root *, u64, btrfs_readdir_callback_t); 64 65 /* root.c */ 66 int btrfs_find_root(u64, struct btrfs_root *, struct btrfs_root_item *); 67 u64 btrfs_lookup_root_ref(u64, struct btrfs_root_ref *, char *); 68 69 /* inode.c */ 70 u64 btrfs_lookup_inode_ref(struct btrfs_root *, u64, struct btrfs_inode_ref *, 71 char *); 72 int btrfs_lookup_inode(const struct btrfs_root *, struct btrfs_key *, 73 struct btrfs_inode_item *, struct btrfs_root *); 74 int btrfs_readlink(const struct btrfs_root *, u64, char *); 75 u64 btrfs_lookup_path(struct btrfs_root *, u64, const char *, u8 *, 76 struct btrfs_inode_item *, int); 77 u64 btrfs_file_read(const struct btrfs_root *, u64, u64, u64, char *); 78 79 /* subvolume.c */ 80 u64 btrfs_get_default_subvol_objectid(void); 81 82 /* extent-io.c */ 83 u64 btrfs_read_extent_inline(struct btrfs_path *, 84 struct btrfs_file_extent_item *, u64, u64, 85 char *); 86 u64 btrfs_read_extent_reg(struct btrfs_path *, struct btrfs_file_extent_item *, 87 u64, u64, char *); 88 89 #endif /* !__BTRFS_BTRFS_H__ */ 90