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/*
 * efs_fs_i.h
 *
 * Copyright (c) 1999 Al Smith
 *
 * Portions derived from IRIX header files (c) 1988 Silicon Graphics
 */

#ifndef __EFS_FS_I_H__
#define __EFS_FS_I_H__

typedef int32_t         efs_block_t;
typedef uint32_t        efs_ino_t;

#define EFS_DIRECTEXTENTS       12

/*
 * layout of an extent, in memory and on disk. 8 bytes exactly.
 */
typedef union extent_u {
        unsigned char raw[8];
        struct extent_s {
                unsigned int    ex_magic:8;     /* magic # (zero) */
                unsigned int    ex_bn:24;       /* basic block */
                unsigned int    ex_length:8;    /* numblocks in this extent */
                unsigned int    ex_offset:24;   /* logical offset into file */
        } cooked;
} efs_extent;

typedef struct edevs {
        short           odev;
        unsigned int    ndev;
} efs_devs;

/*
 * extent based filesystem inode as it appears on disk.  The efs inode
 * is exactly 128 bytes long.
 */
struct  efs_dinode {
        u_short         di_mode;        /* mode and type of file */
        short           di_nlink;       /* number of links to file */
        u_short         di_uid;         /* owner's user id */
        u_short         di_gid;         /* owner's group id */
        int32_t         di_size;        /* number of bytes in file */
        int32_t         di_atime;       /* time last accessed */
        int32_t         di_mtime;       /* time last modified */
        int32_t         di_ctime;       /* time created */
        uint32_t        di_gen;         /* generation number */
        short           di_numextents;  /* # of extents */
        u_char          di_version;     /* version of inode */
        u_char          di_spare;       /* spare - used by AFS */
        union di_addr {
                efs_extent      di_extents[EFS_DIRECTEXTENTS];
                efs_devs        di_dev; /* device for IFCHR/IFBLK */
        } di_u;
};

/* efs inode storage in memory */
struct efs_inode_info {
        int             numextents;
        int             lastextent;

        efs_extent      extents[EFS_DIRECTEXTENTS];
        struct inode    vfs_inode;
};

#endif  /* __EFS_FS_I_H__ */