root/fs/befs/befs.h

INCLUDED FROM

DEFINITIONS

1. BEFS_SB
2. BEFS_I
3. iaddr2blockno
4. blockno2iaddr
5. befs_iaddrs_per_block
6. befs_iaddr_is_empty
7. befs_brun_size

/*
 * befs.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;
/*
 * 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;

        struct inode vfs_inode;

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


/* 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->s_fs_info;
}

static inline befs_inode_info *
BEFS_I(const struct inode *inode)
{
        return list_entry(inode, struct befs_inode_info, vfs_inode);
}

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_disk_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;
}

#include "endian.h"

#endif                          /* _LINUX_BEFS_H */