sun_disklabel.h

早期freebsd实现

/*
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This software was developed by the Computer Systems Engineering group
 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
 * contributed to Berkeley.
 *
 * 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, Lawrence Berkeley Laboratory.
 *
 * 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.
 *
 *	@(#)sun_disklabel.h	8.1 (Berkeley) 6/11/93
 *
 * from: $Header: sun_disklabel.h,v 1.4 92/06/17 07:04:13 torek Exp $
 */

/*
 * SunOS disk label layout (only relevant portions discovered here).
 */

#define	SUN_DKMAGIC	55998

/* These are the guys that Sun's dkinfo needs... */
#define DKIOCGGEOM	_IOR('d', 2, struct sun_dkgeom)	/* geometry info */
#define DKIOCINFO	_IOR('d', 8, struct sun_dkctlr)	/* controller info */
#define DKIOCGPART	_IOR('d', 4, struct sun_dkpart)	/* partition info */

/* geometry info */
struct sun_dkgeom {
	u_short	sdkc_ncylinders;	/* data cylinders */
	u_short	sdkc_acylinders;	/* alternate cylinders */
	u_short	sdkc_xxx1;
	u_short	sdkc_ntracks;		/* tracks per cylinder */
	u_short	sdkc_xxx2;
	u_short	sdkc_nsectors;		/* sectors per track */
	u_short	sdkc_interleave;	/* interleave factor */
	u_short	sdkc_xxx3;
	u_short	sdkc_xxx4;
	u_short	sdkc_sparespercyl;	/* spare sectors per cylinder */
	u_short	sdkc_rpm;		/* rotational speed */
	u_short	sdkc_pcylinders;	/* physical cylinders */
	u_short	sdkc_xxx5[7];
};

/* controller info */
struct sun_dkctlr {
	int	sdkc_addr;		/* controller address */
	short	sdkc_unit;		/* unit (slave) address */
	short	sdkc_type;		/* controller type */
	short	sdkc_flags;		/* flags */
};

/* partition info */
struct sun_dkpart {
	long	sdkp_cyloffset;		/* starting cylinder */
	long	sdkp_nsectors;		/* number of sectors */
};

struct sun_disklabel {			/* total size = 512 bytes */
	char	sl_text[128];
	char	sl_xxx1[292];
	u_short sl_rpm;			/* rotational speed */
	char	sl_xxx2[2];
	u_short sl_sparespercyl;	/* spare sectors per cylinder */
	char	sl_xxx3[4];
	u_short sl_interleave;		/* interleave factor */
	u_short	sl_ncylinders;		/* data cylinders */
	u_short	sl_acylinders;		/* alternate cylinders */
	u_short	sl_ntracks;		/* tracks per cylinder */
	u_short	sl_nsectors;		/* sectors per track */
	char	sl_xxx4[4];
	struct sun_dkpart sl_part[8];	/* partition layout */
	u_short	sl_magic;		/* == SUN_DKMAGIC */
	u_short	sl_cksum;		/* xor checksum of all shorts */
};

#ifdef KERNEL
/* reads sun label in sector at [cp..cp+511] and sets *lp to BSD label */
int	sun_disklabel __P((caddr_t, struct disklabel *)); /* true on success */

/* compatability dk ioctl's */
int	sun_dkioctl __P((struct dkdevice *, int, caddr_t, int));
#endif