101 lines
4.1 KiB
C
101 lines
4.1 KiB
C
/*-
|
|
* Copyright (c) 1982, 1986, 1993
|
|
* 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 8.1 (Berkeley) 6/2/93
|
|
* $Id$
|
|
*/
|
|
|
|
#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 {
|
|
long bt_csn; /* cartridge serial number */
|
|
u_short bt_mbz; /* unused; should be 0 */
|
|
u_short bt_flag; /* -1 => alignment cartridge */
|
|
struct bt_bad {
|
|
u_short bt_cyl; /* cylinder number of bad sector */
|
|
u_short bt_trksec; /* track and sector number */
|
|
} bt_bad[DKBAD_MAXBAD];
|
|
};
|
|
|
|
#define ECC 0
|
|
#define SSE 1
|
|
#define BSE 2
|
|
#define CONT 3
|
|
|
|
#ifdef KERNEL
|
|
#include <sys/conf.h>
|
|
|
|
#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, d_strategy_t *strat,
|
|
struct disklabel *lp, struct dkbad *btp));
|
|
daddr_t transbad144 __P((struct dkbad_intern *bip, daddr_t blkno));
|
|
#endif
|
|
|
|
#endif /* !_SYS_DKBAD_H_ */
|