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/* Format of an inode on disk
Copyright (C) 1991, 1993 Free Software Foundation
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
The GNU Hurd is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with the GNU Hurd; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Modified from UCB by Michael I. Bushnell. */
/*
* Copyright (c) 1982, 1989 The Regents of the University of California.
* All rights reserved.
*
* Redistribution is only permitted until one year after the first shipment
* of 4.4BSD by the Regents. Otherwise, redistribution and use in source and
* binary forms are permitted provided that: (1) source distributions retain
* this entire copyright notice and comment, and (2) distributions including
* binaries display the following acknowledgement: This product includes
* software developed by the University of California, Berkeley and its
* contributors'' in the documentation or other materials provided with the
* distribution and in all advertising materials mentioning features or use
* of this software. Neither the name of the University nor the names of
* its contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* @(#)dinode.h 7.9 (Berkeley) 6/28/90
*/
/*
* This structure defines the on-disk format of an inode.
*/
#define NDADDR 12 /* direct addresses in inode */
#define NIADDR 3 /* indirect addresses in inode */
/* Indexes into di_ib */
#define INDIR_SINGLE 0
#define INDIR_DOUBLE 1
#define INDIR_TRIPLE 2 /* NOT SUPPORTED */
struct dinode {
u_short di_model; /* 0: mode and type of file (low bits) */
nlink_t di_nlink; /* 2: number of links to file */
u_short di_uidl; /* 4: owner's user id (low bits) */
u_short di_gidl; /* 6: owner's group id (low bits) */
u_quad di_qsize; /* 8: number of bytes in file */
time_t di_atime; /* 16: time last accessed */
long di_atusec;
time_t di_mtime; /* 24: time last modified */
long di_mtusec;
time_t di_ctime; /* 32: last time inode changed */
long di_ctusec;
daddr_t di_db[NDADDR]; /* 40: disk block addresses */
daddr_t di_ib[NIADDR]; /* 88: indirect blocks */
long di_flags; /* 100: status, currently unused */
long di_blocks; /* 104: blocks actually held */
long di_gen; /* 108: generation number */
long di_trans; /* 112: filesystem tranlator */
uid_t di_author; /* 116: author id */
u_short di_uidh; /* 120: user id (high bits) */
u_short di_gidh; /* 122: group id (high bits) */
u_short di_modeh; /* 124: mode (high bits) */
short di_spare; /* 126: reserved, currently unused */
};
#define DI_UID(di) ((di)->di_uidl | ((int)(di)->di_uidh << 16))
#define DI_GID(di) ((di)->di_gidl | ((int)(di)->di_gidh << 16))
#define DI_MODE(di) ((di)->di_model | ((int)(di)->di_modeh << 16))
#define LINK_MAX 32767 /* limited by width of nlink_t == 16 bits */
#if BYTE_ORDER == LITTLE_ENDIAN || defined(tahoe) /* ugh! -- must be fixed */
#define di_size di_qsize.val[0]
#else /* BYTE_ORDER == BIG_ENDIAN */
#define di_size di_qsize.val[1]
#endif
#define di_rdev di_db[0]
/* file modes -- these are known to match appropriate values in gnu/stat.h */
#define IFMT 000000170000 /* type of file */
#define IFIFO 000000010000 /* named pipe (fifo) */
#define IFCHR 000000020000 /* character special */
#define IFDIR 000000040000 /* directory */
#define IFBLK 000000060000 /* block special */
#define IFREG 000000100000 /* regular */
#define IFLNK 000000120000 /* symbolic link */
#define IFSOCK 000000140000 /* socket */
#define ISPEC 000000607000 /* special user-changeable bits */
#define INOCACHE 000000400000 /* don't cache contents */
#define IUSEUNK 000000200000 /* use IUNK in pref to IKNOWN */
#define ISUID 000000004000 /* set user id on execution */
#define ISGID 000000002000 /* set group id on execution */
#define ISVTX 000000001000 /* caching preference / append only dir */
/* masks for various sets of permissions: */
#define IOWNER 000000000700 /* owner of file */
#define IGROUP 000000000070 /* group of file */
#define IKNOWN 000000000007 /* anyone who possesses a uid */
#define IUNKNOWN 000007000000 /* anyone who doesn't possess a uid */
#define ISPARE 037770000000 /* unused (yet) */
#define IREAD 0400 /* read, write, execute permissions */
#define IWRITE 0200
#define IEXEC 0100
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