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/*-
* Copyright (c) 1994 Bruce D. Evans.
* All rights reserved.
*
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* Copyright (c) 1982, 1986, 1988 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.
*
* from: @(#)wd.c 7.2 (Berkeley) 5/9/91
* from: wd.c,v 1.55 1994/10/22 01:57:12 phk Exp $
* from: @(#)ufs_disksubr.c 7.16 (Berkeley) 5/4/91
* from: ufs_disksubr.c,v 1.8 1994/06/07 01:21:39 phk Exp $
* $Id: subr_dkbad.c,v 1.7 1997/11/24 04:14:21 dyson Exp $
*/
#include <sys/param.h>
#include <sys/buf.h>
#include <sys/conf.h>
#include <sys/disklabel.h>
#include <sys/dkbad.h>
#include <sys/malloc.h>
/*
* Internalize the bad sector table.
* TODO:
* o Fix types.
* Type long should be daddr_t since we compare with blkno's.
* Sentinel -1 should be ((daddr_t)-1).
* o Can remove explicit test for sentinel if it is a positive
* (unsigned or not) value larger than all possible blkno's.
* o Check that the table is sorted.
* o Use faster searches.
* o Use the internal table in wddump().
* o Don't duplicate so much code.
* o Do all bad block handing in a driver-independent file.
* o Remove limit of 126 spare sectors.
*/
struct dkbad_intern *
internbad144(btp, lp)
struct dkbad *btp;
struct disklabel *lp;
{
struct dkbad_intern *bip;
int i;
bip = malloc(sizeof *bip, M_DEVBUF, M_WAITOK);
/*
* Spare sectors are allocated beginning with the last sector of
* the second last track of the disk (the last track is used for
* the bad sector list).
*/
bip->bi_maxspare = lp->d_secperunit - lp->d_nsectors - 1;
bip->bi_nbad = DKBAD_MAXBAD;
i = 0;
for (; i < DKBAD_MAXBAD && btp->bt_bad[i].bt_cyl != DKBAD_NOCYL; i++)
bip->bi_bad[i] = btp->bt_bad[i].bt_cyl * lp->d_secpercyl
+ (btp->bt_bad[i].bt_trksec >> 8)
* lp->d_nsectors
+ (btp->bt_bad[i].bt_trksec & 0x00ff);
bip->bi_bad[i] = -1;
return (bip);
}
char *
readbad144(dev, strat, lp, bdp)
dev_t dev;
d_strategy_t *strat;
struct disklabel *lp;
struct dkbad *bdp;
{
struct buf *bp;
struct dkbad *db;
int i;
char *msg;
bp = geteblk((int)lp->d_secsize);
i = 0;
do {
/* Read a bad sector table. */
bp->b_dev = dev;
bp->b_blkno = lp->d_secperunit - lp->d_nsectors + i;
if (lp->d_secsize > DEV_BSIZE)
bp->b_blkno *= lp->d_secsize / DEV_BSIZE;
else
bp->b_blkno /= DEV_BSIZE / lp->d_secsize;
bp->b_bcount = lp->d_secsize;
bp->b_flags |= B_BUSY | B_READ;
bp->b_flags &= ~B_ERROR;
(*strat)(bp);
/* If successful, validate, otherwise try another. */
if (biowait(bp) == 0) {
db = (struct dkbad *)(bp->b_data);
if (db->bt_mbz == 0 && db->bt_flag == DKBAD_MAGIC) {
msg = NULL;
*bdp = *db;
break;
}
msg = "bad sector table corrupted";
} else
msg = "bad sector table I/O error";
} while ((bp->b_flags & B_ERROR) && (i += 2) < 10 &&
i < lp->d_nsectors);
bp->b_flags |= B_INVAL | B_AGE;
brelse(bp);
return (msg);
}
daddr_t
transbad144(bip, blkno)
struct dkbad_intern *bip;
daddr_t blkno;
{
int i;
/*
* List is sorted, so the search can terminate when it is past our
* sector.
*/
for (i = 0; bip->bi_bad[i] != -1 && bip->bi_bad[i] <= blkno; i++)
if (bip->bi_bad[i] == blkno)
/*
* Spare sectors are allocated in decreasing order.
*/
return (bip->bi_maxspare - i);
return (blkno);
}
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