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/*-
* Copyright (c) 1982, 1986, 1993, 1994
* 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.
*
* @(#)dkbad.h 8.2 (Berkeley) 7/10/94
* $Id: dkbad.h,v 1.6 1996/03/11 02:07:37 hsu Exp $
*/
#ifndef _SYS_DKBAD_H_
#define _SYS_DKBAD_H_
/*
* Definitions needed to perform bad sector revectoring ala DEC STD 144.
*
* The bad sector information is located in the first 5 even numbered
* sectors of the last track of the disk pack. There are five identical
* copies of the information, described by the dkbad structure.
*
* Replacement sectors are allocated starting with the first sector before
* the bad sector information and working backwards towards the beginning of
* the disk. A maximum of 126 bad sectors are supported. The position of
* the bad sector in the bad sector table determines which replacement sector
* it corresponds to.
*
* The bad sector information and replacement sectors are conventionally
* only accessible through the 'c' file system partition of the disk. If
* that partition is used for a file system, the user is responsible for
* making sure that it does not overlap the bad sector information or any
* replacement sectors.
*/
#define DKBAD_MAGIC 0x4321 /* normal value for bt_flag */
#define DKBAD_MAXBAD 126 /* maximum bad sectors supported */
#define DKBAD_NOCYL 0xffff /* cylinder to mark end of disk table */
#define DKBAD_NOTRKSEC 0xffff /* track/sector to mark end */
struct dkbad {
int32_t bt_csn; /* cartridge serial number */
u_int16_t bt_mbz; /* unused; should be 0 */
u_int16_t bt_flag; /* -1 => alignment cartridge */
struct bt_bad {
u_int16_t bt_cyl; /* cylinder number of bad sector */
u_int16_t bt_trksec; /* track and sector number */
} bt_bad[DKBAD_MAXBAD];
};
#define ECC 0
#define SSE 1
#define BSE 2
#define CONT 3
#ifdef KERNEL
#define DKBAD_NOSECT (-1) /* sector to mark end of core table */
struct dkbad_intern {
daddr_t bi_maxspare; /* last spare sector */
u_int bi_nbad; /* actual dimension of bi_badsect[] */
long bi_bad[DKBAD_MAXBAD + 1]; /* actually usually less */
};
struct disklabel;
struct dkbad_intern *internbad144 __P((struct dkbad *btp,
struct disklabel *lp));
char *readbad144 __P((dev_t dev, void (*strat)(struct buf *bp),
struct disklabel *lp, struct dkbad *btp));
daddr_t transbad144 __P((struct dkbad_intern *bip, daddr_t blkno));
#endif
#endif /* !_SYS_DKBAD_H_ */
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