[unix-history] / sys / ufs / dinode.h

/*
 * Copyright (c) 1982, 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)dinode.h	7.10 (Berkeley) 5/8/91
 */

/*
 * A dinode contains all the meta-data associated with a UFS file.
 * This structure defines the on-disk format of a dinode.
 */

#define	NDADDR	12		/* direct addresses in inode */
#define	NIADDR	3		/* indirect addresses in inode */

#define	MAXFASTLINK	(((NDADDR+NIADDR) * sizeof(daddr_t)) - 1)

struct dinode {
	u_short	di_mode;	/*  0: mode and type of file */
	short	di_nlink;	/*  2: number of links to file */
	uid_t	di_uid;		/*  4: owner's user id */
	gid_t	di_gid;		/*  6: owner's group id */
	u_quad	di_qsize;	/*  8: number of bytes in file */
	time_t	di_atime;	/* 16: time last accessed */
	long	di_atspare;
	time_t	di_mtime;	/* 24: time last modified */
	long	di_mtspare;
	time_t	di_ctime;	/* 32: last time inode changed */
	long	di_ctspare;
	union {
		struct {
			daddr_t	di_udb[NDADDR];	/* 40: disk block addresses */
			daddr_t	di_uib[NIADDR];	/* 88: indirect blocks */
		} di_addr;
		char di_usymlink[MAXFASTLINK+1];
	} di_un;
	long	di_flags;	/* 100: status, currently unused */
	long	di_blocks;	/* 104: blocks actually held */
	long	di_gen;		/* 108: generation number */
#define	DI_SPARE_SZ	4		/* 112: spare for 4 longs */
	u_long	di_spare[DI_SPARE_SZ];	/* reserved (unused) */
};

#define	di_db		di_un.di_addr.di_udb
#define di_ib		di_un.di_addr.di_uib
#define	di_symlink	di_un.di_usymlink

#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 */
#define	IFMT		0170000		/* mask of file type */
#define	IFIFO		0010000		/* named pipe (fifo) */
#define	IFCHR		0020000		/* character special device */
#define	IFDIR		0040000		/* directory */
#define	IFBLK		0060000		/* block special device */
#define	IFREG		0100000		/* regular file */
#define	IFLNK		0120000		/* symbolic link */
#define	IFSOCK		0140000		/* UNIX domain socket */

#define	ISUID		04000		/* set user identifier when exec'ing */
#define	ISGID		02000		/* set group identifier when exec'ing */
#define	ISVTX		01000		/* save execution information on exit */
#define	IREAD		0400		/* read permission */
#define	IWRITE		0200		/* write permission */
#define	IEXEC		0100		/* execute permission */

#define	DFASTLINK(di) \
	((((di).di_mode & IFMT) == IFLNK) && \
	 ((di).di_size <= MAXFASTLINK) && \
	 ((di).di_size == (di).di_spare[0]))
Commit	Line	Data
15637ed4 RG	1	/*
	2	* Copyright (c) 1982, 1989 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*
	33	* @(#)dinode.h 7.10 (Berkeley) 5/8/91
	34	*/
	35
	36	/*
	37	* A dinode contains all the meta-data associated with a UFS file.
	38	* This structure defines the on-disk format of a dinode.
	39	*/
	40
	41	#define NDADDR 12 /* direct addresses in inode */
	42	#define NIADDR 3 /* indirect addresses in inode */
	43
ef7ff598 JH	44	#define MAXFASTLINK (((NDADDR+NIADDR) * sizeof(daddr_t)) - 1)
ef7ff598 JH	45
15637ed4 RG	46	struct dinode {
	47	u_short di_mode; /* 0: mode and type of file */
	48	short di_nlink; /* 2: number of links to file */
	49	uid_t di_uid; /* 4: owner's user id */
	50	gid_t di_gid; /* 6: owner's group id */
	51	u_quad di_qsize; /* 8: number of bytes in file */
	52	time_t di_atime; /* 16: time last accessed */
	53	long di_atspare;
	54	time_t di_mtime; /* 24: time last modified */
	55	long di_mtspare;
	56	time_t di_ctime; /* 32: last time inode changed */
	57	long di_ctspare;
ef7ff598 JH	58	union {
	59	struct {
	60	daddr_t di_udb[NDADDR]; /* 40: disk block addresses */
	61	daddr_t di_uib[NIADDR]; /* 88: indirect blocks */
	62	} di_addr;
	63	char di_usymlink[MAXFASTLINK+1];
	64	} di_un;
15637ed4 RG	65	long di_flags; /* 100: status, currently unused */
	66	long di_blocks; /* 104: blocks actually held */
	67	long di_gen; /* 108: generation number */
ef7ff598 JH	68	#define DI_SPARE_SZ 4 /* 112: spare for 4 longs */
ef7ff598 JH	69	u_long di_spare[DI_SPARE_SZ]; /* reserved (unused) */
15637ed4 RG	70	};
15637ed4 RG	71
ef7ff598 JH	72	#define di_db di_un.di_addr.di_udb
	73	#define di_ib di_un.di_addr.di_uib
	74	#define di_symlink di_un.di_usymlink
	75
15637ed4 RG	76	#if BYTE_ORDER == LITTLE_ENDIAN \|\| defined(tahoe) /* ugh! -- must be fixed */
	77	#define di_size di_qsize.val[0]
	78	#else /* BYTE_ORDER == BIG_ENDIAN */
	79	#define di_size di_qsize.val[1]
	80	#endif
	81	#define di_rdev di_db[0]
	82
	83	/* file modes */
	84	#define IFMT 0170000 /* mask of file type */
	85	#define IFIFO 0010000 /* named pipe (fifo) */
	86	#define IFCHR 0020000 /* character special device */
	87	#define IFDIR 0040000 /* directory */
	88	#define IFBLK 0060000 /* block special device */
	89	#define IFREG 0100000 /* regular file */
	90	#define IFLNK 0120000 /* symbolic link */
	91	#define IFSOCK 0140000 /* UNIX domain socket */
	92
	93	#define ISUID 04000 /* set user identifier when exec'ing */
	94	#define ISGID 02000 /* set group identifier when exec'ing */
	95	#define ISVTX 01000 /* save execution information on exit */
	96	#define IREAD 0400 /* read permission */
	97	#define IWRITE 0200 /* write permission */
	98	#define IEXEC 0100 /* execute permission */
ef7ff598 JH	99
	100	#define DFASTLINK(di) \
	101	((((di).di_mode & IFMT) == IFLNK) && \
	102	((di).di_size <= MAXFASTLINK) && \
	103	((di).di_size == (di).di_spare[0]))