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422 giacomo 1
/*
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 * efs_fs_i.h
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 *
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 * Copyright (c) 1999 Al Smith
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 *
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 * Portions derived from IRIX header files (c) 1988 Silicon Graphics
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 */
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#ifndef __EFS_FS_I_H__
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#define __EFS_FS_I_H__
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typedef int32_t         efs_block_t;
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typedef uint32_t        efs_ino_t;
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#define EFS_DIRECTEXTENTS       12
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/*
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 * layout of an extent, in memory and on disk. 8 bytes exactly.
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 */
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typedef union extent_u {
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        unsigned char raw[8];
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        struct extent_s {
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                unsigned int    ex_magic:8;     /* magic # (zero) */
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                unsigned int    ex_bn:24;       /* basic block */
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                unsigned int    ex_length:8;    /* numblocks in this extent */
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                unsigned int    ex_offset:24;   /* logical offset into file */
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        } cooked;
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} efs_extent;
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typedef struct edevs {
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        short           odev;
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        unsigned int    ndev;
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} efs_devs;
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/*
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 * extent based filesystem inode as it appears on disk.  The efs inode
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 * is exactly 128 bytes long.
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 */
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struct  efs_dinode {
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        u_short         di_mode;        /* mode and type of file */
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        short           di_nlink;       /* number of links to file */
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        u_short         di_uid;         /* owner's user id */
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        u_short         di_gid;         /* owner's group id */
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        int32_t         di_size;        /* number of bytes in file */
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        int32_t         di_atime;       /* time last accessed */
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        int32_t         di_mtime;       /* time last modified */
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        int32_t         di_ctime;       /* time created */
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        uint32_t        di_gen;         /* generation number */
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        short           di_numextents;  /* # of extents */
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        u_char          di_version;     /* version of inode */
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        u_char          di_spare;       /* spare - used by AFS */
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        union di_addr {
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                efs_extent      di_extents[EFS_DIRECTEXTENTS];
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                efs_devs        di_dev; /* device for IFCHR/IFBLK */
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        } di_u;
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};
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/* efs inode storage in memory */
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struct efs_inode_info {
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        int             numextents;
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        int             lastextent;
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        efs_extent      extents[EFS_DIRECTEXTENTS];
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        struct inode    vfs_inode;
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};
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#endif  /* __EFS_FS_I_H__ */
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