LXR uboot/fs/btrfs/btrfs.h

   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
  14struct 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
  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__ */
  88