LXR uboot/fs/btrfs/btrfs.h

   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
  15struct 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
  26extern struct btrfs_info btrfs_info;
  27
  28/* hash.c */
  29void btrfs_hash_init(void);
  30u32 btrfs_crc32c(u32, const void *, size_t);
  31u32 btrfs_csum_data(char *, u32, size_t);
  32void btrfs_csum_final(u32, void *);
  33
  34static inline u64 btrfs_name_hash(const char *name, int len)
  35{
  36        return btrfs_crc32c((u32) ~1, name, len);
  37}
  38
  39/* dev.c */
  40extern struct blk_desc *btrfs_blk_desc;
  41extern disk_partition_t *btrfs_part_info;
  42
  43int btrfs_devread(u64, int, void *);
  44
  45/* chunk-map.c */
  46u64 btrfs_map_logical_to_physical(u64);
  47int btrfs_chunk_map_init(void);
  48void btrfs_chunk_map_exit(void);
  49int btrfs_read_chunk_tree(void);
  50
  51/* compression.c */
  52u32 btrfs_decompress(u8 type, const char *, u32, char *, u32);
  53
  54/* super.c */
  55int btrfs_read_superblock(void);
  56
  57/* dir-item.c */
  58typedef int (*btrfs_readdir_callback_t)(const struct btrfs_root *,
  59                                        struct btrfs_dir_item *);
  60
  61int btrfs_lookup_dir_item(const struct btrfs_root *, u64, const char *, int,
  62                           struct btrfs_dir_item *);
  63int btrfs_readdir(const struct btrfs_root *, u64, btrfs_readdir_callback_t);
  64
  65/* root.c */
  66int btrfs_find_root(u64, struct btrfs_root *, struct btrfs_root_item *);
  67u64 btrfs_lookup_root_ref(u64, struct btrfs_root_ref *, char *);
  68
  69/* inode.c */
  70u64 btrfs_lookup_inode_ref(struct btrfs_root *, u64, struct btrfs_inode_ref *,
  71                            char *);
  72int btrfs_lookup_inode(const struct btrfs_root *, struct btrfs_key *,
  73                        struct btrfs_inode_item *, struct btrfs_root *);
  74int btrfs_readlink(const struct btrfs_root *, u64, char *);
  75u64 btrfs_lookup_path(struct btrfs_root *, u64, const char *, u8 *,
  76                       struct btrfs_inode_item *, int);
  77u64 btrfs_file_read(const struct btrfs_root *, u64, u64, u64, char *);
  78
  79/* subvolume.c */
  80u64 btrfs_get_default_subvol_objectid(void);
  81
  82/* extent-io.c */
  83u64 btrfs_read_extent_inline(struct btrfs_path *,
  84                              struct btrfs_file_extent_item *, u64, u64,
  85                              char *);
  86u64 btrfs_read_extent_reg(struct btrfs_path *, struct btrfs_file_extent_item *,
  87                           u64, u64, char *);
  88
  89#endif /* !__BTRFS_BTRFS_H__ */
  90