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/*
 * include/linux/befs_fs_types.h
 *
 * Copyright (C) 2001 Will Dyson (will@cs.earlham.edu)
 *
 *
 *
 * from linux/include/linux/befs_fs.h
 *
 * Copyright (C) 1999 Makoto Kato (m_kato@ga2.so-net.ne.jp)
 *
 */
 
#ifndef _LINUX_BEFS_FS_TYPES
#define _LINUX_BEFS_FS_TYPES
 
#ifdef __KERNEL__
#include <linux/types.h>
#endif /*__KERNEL__*/
 
#define PACKED __attribute__ ((__packed__))
 
/*
 * Max name lengths of BFS
 */
 
#define BEFS_NAME_LEN 255
 
#define BEFS_SYMLINK_LEN 144
#define BEFS_NUM_DIRECT_BLOCKS 12
#define B_OS_NAME_LENGTH 32
 
/* The datastream blocks mapped by the double-indirect
 * block are always 4 fs blocks long.
 * This eliminates the need for linear searches among
 * the potentially huge number of indirect blocks
 *
 * Err. Should that be 4 fs blocks or 4k???
 * It matters on large blocksize volumes
 */
#define BEFS_DBLINDIR_BRUN_LEN 4
 
/*
 * Flags of superblock
 */
 
enum super_flags {
	BEFS_BYTESEX_BE,
	BEFS_BYTESEX_LE,
	BEFS_CLEAN = 0x434c454e,
	BEFS_DIRTY = 0x44495254,
	BEFS_SUPER_MAGIC1 = 0x42465331,	/* BFS1 */
	BEFS_SUPER_MAGIC2 = 0xdd121031,
	BEFS_SUPER_MAGIC3 = 0x15b6830e,
};
 
#define BEFS_BYTEORDER_NATIVE 0x42494745
 
#define BEFS_SUPER_MAGIC BEFS_SUPER_MAGIC1
 
/*
 * Flags of inode
 */
 
#define BEFS_INODE_MAGIC1 0x3bbe0ad9
 
enum inode_flags {
	BEFS_INODE_IN_USE = 0x00000001,
	BEFS_ATTR_INODE = 0x00000004,
	BEFS_INODE_LOGGED = 0x00000008,
	BEFS_INODE_DELETED = 0x00000010,
	BEFS_LONG_SYMLINK = 0x00000040,
	BEFS_PERMANENT_FLAG = 0x0000ffff,
	BEFS_INODE_NO_CREATE = 0x00010000,
	BEFS_INODE_WAS_WRITTEN = 0x00020000,
	BEFS_NO_TRANSACTION = 0x00040000,
};
/* 
 * On-Disk datastructures of BeFS
 */
 
typedef u64 befs_off_t;
typedef u64 befs_time_t;
typedef void befs_binode_etc;
 
/* Block runs */
typedef struct {
	u32 allocation_group;
	u16 start;
	u16 len;
} PACKED befs_block_run;
 
typedef befs_block_run befs_inode_addr;
 
/*
 * The Superblock Structure
 */
typedef struct {
	char name[B_OS_NAME_LENGTH];
	u32 magic1;
	u32 fs_byte_order;
 
	u32 block_size;
	u32 block_shift;
 
	befs_off_t num_blocks;
	befs_off_t used_blocks;
 
	u32 inode_size;
 
	u32 magic2;
	u32 blocks_per_ag;
	u32 ag_shift;
	u32 num_ags;
 
	u32 flags;
 
	befs_block_run log_blocks;
	befs_off_t log_start;
	befs_off_t log_end;
 
	u32 magic3;
	befs_inode_addr root_dir;
	befs_inode_addr indices;
 
} PACKED befs_super_block;
 
/* 
 * Note: the indirect and dbl_indir block_runs may
 * be longer than one block!
 */
typedef struct {
	befs_block_run direct[BEFS_NUM_DIRECT_BLOCKS];
	befs_off_t max_direct_range;
	befs_block_run indirect;
	befs_off_t max_indirect_range;
	befs_block_run double_indirect;
	befs_off_t max_double_indirect_range;
	befs_off_t size;
} PACKED befs_data_stream;
 
/* Attribute */
typedef struct {
	u32 type;
	u16 name_size;
	u16 data_size;
	char name[1];
} PACKED befs_small_data;
 
/* Inode structure */
typedef struct {
	u32 magic1;
	befs_inode_addr inode_num;
	u32 uid;
	u32 gid;
	u32 mode;
	u32 flags;
	befs_time_t create_time;
	befs_time_t last_modified_time;
	befs_inode_addr parent;
	befs_inode_addr attributes;
	u32 type;
 
	u32 inode_size;
	u32 etc;		/* not use */
 
	union {
		befs_data_stream datastream;
		char symlink[BEFS_SYMLINK_LEN];
	} data;
 
	u32 pad[4];		/* not use */
	befs_small_data small_data[1];
} PACKED befs_inode;
 
/*
 * B+tree superblock
 */
 
#define BEFS_BTREE_MAGIC 0x69f6c2e8
 
enum btree_types {
	BTREE_STRING_TYPE = 0,
	BTREE_INT32_TYPE = 1,
	BTREE_UINT32_TYPE = 2,
	BTREE_INT64_TYPE = 3,
	BTREE_UINT64_TYPE = 4,
	BTREE_FLOAT_TYPE = 5,
	BTREE_DOUBLE_TYPE = 6
};
 
typedef struct {
	u32 magic;
	u32 node_size;
	u32 max_depth;
	u32 data_type;
	befs_off_t root_node_ptr;
	befs_off_t free_node_ptr;
	befs_off_t max_size;
} PACKED befs_btree_super;
 
/*
 * Header stucture of each btree node
 */
typedef struct {
	befs_off_t left;
	befs_off_t right;
	befs_off_t overflow;
	u16 all_key_count;
	u16 all_key_length;
} PACKED befs_btree_nodehead;
 
#endif				/* _LINUX_BEFS_FS_TYPES */