Add code for reading NetBSD disklabels.
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leo
parent
f819f78977
commit
7b23fbe29a
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# $NetBSD: Makefile,v 1.4 2002/02/24 20:51:07 leo Exp $
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# $NetBSD: Makefile,v 1.5 2002/03/22 21:27:58 leo Exp $
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#
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LIB = libtos.a
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OBJS = biosrw.o ahdi.o aout.o bsdstart.o cread.o diskio.o elf.o eprintf.o \
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error.o sysinfo.o xalloc.o xexit.o keywait.o
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OBJS = biosrw.o ahdi.o aout.o bsdlabel.o bsdstart.o cread.o diskio.o elf.o \
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eprintf.o error.o sysinfo.o xalloc.o xexit.o keywait.o
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HEADERS = ahdilbl.h diskio.h kparamb.h libtos.h
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HEADERS = ahdilbl.h disklbl.h diskio.h kparamb.h libtos.h
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include ../Makefile.inc
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@ -1,4 +1,4 @@
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/* $NetBSD: ahdilbl.h,v 1.1 2002/02/24 20:51:07 leo Exp $ */
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/* $NetBSD: ahdilbl.h,v 1.2 2002/03/22 21:27:59 leo Exp $ */
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/*
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* Copyright (c) 1995 Leo Weppelman.
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@ -135,4 +135,7 @@ typedef struct {
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} ptable_t;
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EXTERN u_int ahdi_getparts PROTO((disk_t *, ptable_t *, u_int, u_int));
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struct disklabel;
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EXTERN int bsd_getlabel PROTO((disk_t *, struct disklabel *, u_int));
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#endif /* AHDILABEL_H */
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@ -0,0 +1,95 @@
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/* $NetBSD: bsdlabel.c,v 1.1 2002/03/22 21:27:59 leo Exp $ */
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/*
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* Copyright (c) 1995 Waldi Ravens.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Waldi Ravens.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "libtos.h"
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#include "diskio.h"
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#include "ahdilbl.h"
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#include "disklbl.h"
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static int dkcksum PROTO((struct disklabel *));
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int
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bsd_getlabel(dd, dlp, offset)
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disk_t *dd;
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struct disklabel *dlp;
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u_int offset;
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{
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u_char *bblk;
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u_int nsec;
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int rv;
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nsec = (BBMINSIZE + (dd->bsize - 1)) / dd->bsize;
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bblk = disk_read(dd, offset, nsec);
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if (bblk) {
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u_int *end, *p;
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end = (u_int *)&bblk[BBMINSIZE - sizeof(struct disklabel)];
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rv = 1;
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for (p = (u_int *)bblk; p < end; ++p) {
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struct disklabel *dl = (struct disklabel *)&p[1];
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if ( ( (p[0] == NBDAMAGIC && offset == 0)
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|| (p[0] == AHDIMAGIC && offset != 0)
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|| (u_char *)dl - bblk == 7168
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)
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&& dl->d_npartitions <= MAXPARTITIONS
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&& dl->d_magic2 == DISKMAGIC
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&& dl->d_magic == DISKMAGIC
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&& dkcksum(dl) == 0
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) {
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bcopy(dl, dlp, sizeof(*dlp));
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rv = 0;
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break;
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}
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}
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free(bblk);
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}
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else rv = -1;
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return(rv);
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}
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static int
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dkcksum(dl)
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struct disklabel *dl;
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{
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u_short *start, *end, sum = 0;
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start = (u_short *)dl;
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end = (u_short *)&dl->d_partitions[dl->d_npartitions];
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while (start < end)
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sum ^= *start++;
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return(sum);
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}
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@ -0,0 +1,140 @@
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/* $NetBSD: disklbl.h,v 1.1 2002/03/22 21:27:59 leo Exp $ */
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/*
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* Copyright (c) 1987, 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)disklabel.h 8.2 (Berkeley) 7/10/94
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*/
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#ifndef DISKLABEL_H
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#define DISKLABEL_H
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#define DISKMAGIC ((u_int32_t)0x82564557) /* The disk magic number */
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struct disklabel {
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u_int32_t d_magic; /* the magic number */
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u_int16_t d_type; /* drive type */
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u_int16_t d_subtype; /* controller/d_type specific */
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char d_typename[16]; /* type name, e.g. "eagle" */
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/*
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* d_packname contains the pack identifier and is returned when
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* the disklabel is read off the disk or in-core copy.
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* d_boot0 and d_boot1 are the (optional) names of the
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* primary (block 0) and secondary (block 1-15) bootstraps
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* as found in /usr/mdec. These are returned when using
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* getdiskbyname(3) to retrieve the values from /etc/disktab.
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*/
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union {
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char un_d_packname[16]; /* pack identifier */
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struct {
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char *un_d_boot0; /* primary bootstrap name */
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char *un_d_boot1; /* secondary bootstrap name */
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} un_b;
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} d_un;
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#define d_packname d_un.un_d_packname
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#define d_boot0 d_un.un_b.un_d_boot0
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#define d_boot1 d_un.un_b.un_d_boot1
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/* disk geometry: */
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u_int32_t d_secsize; /* # of bytes per sector */
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u_int32_t d_nsectors; /* # of data sectors per track */
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u_int32_t d_ntracks; /* # of tracks per cylinder */
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u_int32_t d_ncylinders; /* # of data cylinders per unit */
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u_int32_t d_secpercyl; /* # of data sectors per cylinder */
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u_int32_t d_secperunit; /* # of data sectors per unit */
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/*
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* Spares (bad sector replacements) below are not counted in
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* d_nsectors or d_secpercyl. Spare sectors are assumed to
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* be physical sectors which occupy space at the end of each
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* track and/or cylinder.
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*/
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u_int16_t d_sparespertrack; /* # of spare sectors per track */
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u_int16_t d_sparespercyl; /* # of spare sectors per cylinder */
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/*
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* Alternate cylinders include maintenance, replacement, configuration
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* description areas, etc.
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*/
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u_int32_t d_acylinders; /* # of alt. cylinders per unit */
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/* hardware characteristics: */
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/*
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* d_interleave, d_trackskew and d_cylskew describe perturbations
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* in the media format used to compensate for a slow controller.
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* Interleave is physical sector interleave, set up by the
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* formatter or controller when formatting. When interleaving is
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* in use, logically adjacent sectors are not physically
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* contiguous, but instead are separated by some number of
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* sectors. It is specified as the ratio of physical sectors
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* traversed per logical sector. Thus an interleave of 1:1
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* implies contiguous layout, while 2:1 implies that logical
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* sector 0 is separated by one sector from logical sector 1.
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* d_trackskew is the offset of sector 0 on track N relative to
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* sector 0 on track N-1 on the same cylinder. Finally, d_cylskew
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* is the offset of sector 0 on cylinder N relative to sector 0
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* on cylinder N-1.
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*/
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u_int16_t d_rpm; /* rotational speed */
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u_int16_t d_interleave; /* hardware sector interleave */
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u_int16_t d_trackskew; /* sector 0 skew, per track */
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u_int16_t d_cylskew; /* sector 0 skew, per cylinder */
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u_int32_t d_headswitch; /* head switch time, usec */
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u_int32_t d_trkseek; /* track-to-track seek, usec */
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u_int32_t d_flags; /* generic flags */
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#define NDDATA 5
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u_int32_t d_drivedata[NDDATA]; /* drive-type specific information */
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#define NSPARE 5
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u_int32_t d_spare[NSPARE]; /* reserved for future use */
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u_int32_t d_magic2; /* the magic number (again) */
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u_int16_t d_checksum; /* xor of data incl. partitions */
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/* filesystem and partition information: */
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u_int16_t d_npartitions; /* number of partitions in following */
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u_int32_t d_bbsize; /* size of boot area at sn0, bytes */
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u_int32_t d_sbsize; /* max size of fs superblock, bytes */
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struct partition { /* the partition table */
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u_int32_t p_size; /* number of sectors in partition */
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u_int32_t p_offset; /* starting sector */
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u_int32_t p_fsize; /* filesystem basic fragment size */
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u_int8_t p_fstype; /* filesystem type, see below */
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u_int8_t p_frag; /* filesystem fragments per block */
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union {
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u_int16_t cpg; /* UFS: FS cylinders per group */
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u_int16_t sgs; /* LFS: FS segment shift */
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} __partition_u1;
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#define p_cpg __partition_u1.cpg
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#define p_sgs __partition_u1.sgs
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} d_partitions[MAXPARTITIONS]; /* actually may be more */
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};
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#endif /* DISKLABEL_H */
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