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/*

 * befs_fs.h

 *

 * Copyright (C) 2001-2002 Will Dyson <will_dyson@pobox.com>

 * Copyright (C) 1999 Makoto Kato (m_kato@ga2.so-net.ne.jp)

 */

#ifndef _LINUX_BEFS_H

#define _LINUX_BEFS_H

#include "befs_fs_types.h"

/* used in debug.c */

#define BEFS_VERSION "0.9.3"

typedef u64 befs_blocknr_t;

typedef u32 vfs_blocknr_t;

/*

 * BeFS in memory structures

 */

typedef struct befs_mount_options {

        gid_t gid;

        uid_t uid;

        int use_gid;

        int use_uid;

        int debug;

        char *iocharset;

} befs_mount_options;

typedef struct befs_sb_info {

        u32 magic1;

        u32 block_size;

        u32 block_shift;

        int byte_order;

        befs_off_t num_blocks;

        befs_off_t used_blocks;

        u32 inode_size;

        u32 magic2;

        /* Allocation group information */

        u32 blocks_per_ag;

        u32 ag_shift;

        u32 num_ags;

        /* jornal log entry */

        befs_block_run log_blocks;

        befs_off_t log_start;

        befs_off_t log_end;

        befs_inode_addr root_dir;

        befs_inode_addr indices;

        u32 magic3;

        befs_mount_options mount_opts;

        struct nls_table *nls;

} befs_sb_info;

typedef struct befs_inode_info {

        u32 i_flags;

        u32 i_type;

        befs_inode_addr i_inode_num;

        befs_inode_addr i_parent;

        befs_inode_addr i_attribute;

        union {

                befs_data_stream ds;

                char symlink[BEFS_SYMLINK_LEN];

        } i_data;

} befs_inode_info;

enum befs_err {

        BEFS_OK,

        BEFS_ERR,

        BEFS_BAD_INODE,

        BEFS_BT_END,

        BEFS_BT_EMPTY,

        BEFS_BT_MATCH,

        BEFS_BT_PARMATCH,

        BEFS_BT_NOT_FOUND

};

/****************************/

/* debug.c */

void befs_error(const struct super_block *sb, const char *fmt, ...);

void befs_warning(const struct super_block *sb, const char *fmt, ...);

void befs_debug(const struct super_block *sb, const char *fmt, ...);

void befs_dump_super_block(const struct super_block *sb, befs_super_block *);

void befs_dump_inode(const struct super_block *sb, befs_inode *);

void befs_dump_index_entry(const struct super_block *sb, befs_btree_super *);

void befs_dump_index_node(const struct super_block *sb, befs_btree_nodehead *);

void befs_dump_inode_addr(const struct super_block *sb, befs_inode_addr);

/****************************/

/* Gets a pointer to the private portion of the super_block

 * structure from the public part

 */

static inline befs_sb_info *

BEFS_SB(const struct super_block *super)

{

        return (befs_sb_info *) super->u.generic_sbp;

}

static inline befs_inode_info *

BEFS_I(const struct inode *inode)

{

        return (befs_inode_info *) inode->u.generic_ip;

}

static inline befs_blocknr_t

iaddr2blockno(struct super_block *sb, befs_inode_addr * iaddr)

{

        return ((iaddr->allocation_group << BEFS_SB(sb)->ag_shift) +

                iaddr->start);

}

static inline befs_inode_addr

blockno2iaddr(struct super_block *sb, befs_blocknr_t blockno)

{

        befs_inode_addr iaddr;

        iaddr.allocation_group = blockno >> BEFS_SB(sb)->ag_shift;

        iaddr.start =

            blockno - (iaddr.allocation_group << BEFS_SB(sb)->ag_shift);

        iaddr.len = 1;

        return iaddr;

}

static inline unsigned int

befs_iaddrs_per_block(struct super_block *sb)

{

        return BEFS_SB(sb)->block_size / sizeof (befs_inode_addr);

}

static inline int

befs_iaddr_is_empty(befs_inode_addr * iaddr)

{

        return (!iaddr->allocation_group) && (!iaddr->start) && (!iaddr->len);

}

static inline size_t

befs_brun_size(struct super_block *sb, befs_block_run run)

{

        return BEFS_SB(sb)->block_size * run.len;

}

#endif                          /* _LINUX_BEFS_H */