[u-boot.git] / fs / btrfs / btrfs.h

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * BTRFS filesystem implementation for U-Boot
 *
 * 2017 Marek Behun, CZ.NIC, [email protected]
 */

#ifndef __BTRFS_BTRFS_H__
#define __BTRFS_BTRFS_H__

#include <linux/rbtree.h>
#include "conv-funcs.h"

struct btrfs_info {
	struct btrfs_super_block sb;
	struct btrfs_root_backup *root_backup;

	struct btrfs_root tree_root;
	struct btrfs_root fs_root;
	struct btrfs_root chunk_root;

	struct rb_root chunks_root;
};

extern struct btrfs_info btrfs_info;

/* hash.c */
void btrfs_hash_init(void);
u32 btrfs_crc32c(u32, const void *, size_t);
u32 btrfs_csum_data(char *, u32, size_t);
void btrfs_csum_final(u32, void *);

static inline u64 btrfs_name_hash(const char *name, int len)
{
	return btrfs_crc32c((u32) ~1, name, len);
}

/* dev.c */
extern struct blk_desc *btrfs_blk_desc;
extern disk_partition_t *btrfs_part_info;

int btrfs_devread(u64, int, void *);

/* chunk-map.c */
u64 btrfs_map_logical_to_physical(u64);
int btrfs_chunk_map_init(void);
void btrfs_chunk_map_exit(void);
int btrfs_read_chunk_tree(void);

/* compression.c */
u32 btrfs_decompress(u8 type, const char *, u32, char *, u32);

/* super.c */
int btrfs_read_superblock(void);

/* dir-item.c */
typedef int (*btrfs_readdir_callback_t)(const struct btrfs_root *,
					struct btrfs_dir_item *);

int btrfs_lookup_dir_item(const struct btrfs_root *, u64, const char *, int,
			   struct btrfs_dir_item *);
int btrfs_readdir(const struct btrfs_root *, u64, btrfs_readdir_callback_t);

/* root.c */
int btrfs_find_root(u64, struct btrfs_root *, struct btrfs_root_item *);
u64 btrfs_lookup_root_ref(u64, struct btrfs_root_ref *, char *);

/* inode.c */
u64 btrfs_lookup_inode_ref(struct btrfs_root *, u64, struct btrfs_inode_ref *,
			    char *);
int btrfs_lookup_inode(const struct btrfs_root *, struct btrfs_key *,
		        struct btrfs_inode_item *, struct btrfs_root *);
int btrfs_readlink(const struct btrfs_root *, u64, char *);
u64 btrfs_lookup_path(struct btrfs_root *, u64, const char *, u8 *,
		       struct btrfs_inode_item *, int);
u64 btrfs_file_read(const struct btrfs_root *, u64, u64, u64, char *);

/* subvolume.c */
u64 btrfs_get_default_subvol_objectid(void);

/* extent-io.c */
u64 btrfs_read_extent_inline(struct btrfs_path *,
			      struct btrfs_file_extent_item *, u64, u64,
			      char *);
u64 btrfs_read_extent_reg(struct btrfs_path *, struct btrfs_file_extent_item *,
			   u64, u64, char *);

#endif /* !__BTRFS_BTRFS_H__ */
Commit	Line	Data
83d290c5	1	/* SPDX-License-Identifier: GPL-2.0+ */
21a14fac MB	2	/*
	3	* BTRFS filesystem implementation for U-Boot
	4	*
	5	* 2017 Marek Behun, CZ.NIC, [email protected]
21a14fac MB	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__ */