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
  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__ */