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/* $OpenBSD: disk.c,v 1.2 1997/09/29 23:33:34 mickey Exp $ */
/*
* Copyright (c) 1997 Tobias Weingartner
* 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 Tobias Weingartner.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
#include <err.h>
#include <util.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/disklabel.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <machine/cpu.h>
#ifdef CPU_BIOSDEV
#include <machine/biosvar.h>
#endif
#include "disk.h"
int
DISK_open(disk, mode)
char *disk;
int mode;
{
int fd;
struct stat st;
fd = opendev(disk, mode, OPENDEV_PART, NULL);
if(fd < 0) err(1, "%s", disk);
if(fstat(fd, &st) < 0) err(1, "%s", disk);
if(!S_ISCHR(st.st_mode) && !S_ISREG(st.st_mode))
err(1, "%s is not a character device or a regular file", disk);
return(fd);
}
int
DISK_close(fd)
int fd;
{
return(close(fd));
}
/* Routine to go after the disklabel for geometry
* information. This should work everywhere, but
* in the land of PC, things are not always what
* they seem.
*/
DISK_metrics *
DISK_getrealmetrics(name)
char *name;
{
DISK_metrics *lm = NULL;
struct disklabel dl;
int fd;
/* Get real metrics */
if((fd = DISK_open(name, O_RDONLY)) >= 0){
lm = malloc(sizeof(DISK_metrics));
if(ioctl(fd, DIOCGDINFO, &dl) < 0){
warn("DIOCGDINFO");
free(lm);
lm = NULL;
}else{
lm->cylinders = dl.d_ncylinders;
lm->heads = dl.d_ntracks;
lm->sectors = dl.d_nsectors;
lm->size = dl.d_secperunit;
}
DISK_close(fd);
}
return(lm);
}
#ifdef CPU_BIOSDEV
/* Routine to go after sysctl info for BIOS
* geometry. This should only really work on PC
* type machines. There is still a problem with
* correlating the BIOS drive to the BSD drive.
*
* XXX - Somebody fix this!
*/
DISK_metrics *
DISK_getbiosmetrics(name)
char *name;
{
DISK_metrics *bm = NULL;
int biosdev, biosgeo;
int mib[3], size;
/* Get BIOS metrics */
mib[0] = CTL_MACHDEP;
mib[1] = CPU_BIOSDEV;
size = sizeof(int);
if(sysctl(mib, 2, &biosdev, &size, NULL, 0) < 0){
warn("sysctl");
return(NULL);
}
mib[1] = CPU_BIOSGEOMETRY;
size = sizeof(int);
if(sysctl(mib, 2, &biosgeo, &size, NULL, 0) < 0){
warn("sysctl");
return(NULL);
}
bm = malloc(sizeof(DISK_metrics));
bm->cylinders = BIOSNTRACKS(biosgeo);
bm->heads = BIOSNHEADS(biosgeo);
bm->sectors = BIOSNSECTS(biosgeo);
bm->size = BIOSNTRACKS(biosgeo) * BIOSNHEADS(biosgeo)
* BIOSNSECTS(biosgeo);
return(bm);
}
#endif /* CPU_BIOSDEV */
/* This is ugly, and convoluted. All the magic
* for disk geo/size happens here. Basically,
* the bios size is the one we will use in the
* rest of the program, the real size is what we
* got from the disklabel. If the disklabel fails,
* we assume we are working with a normal file,
* and should request the user to specify the
* geometry he/she wishes to use.
*/
int
DISK_getmetrics(disk)
disk_t *disk;
{
disk->real = DISK_getrealmetrics(disk->name);
#ifdef CPU_BIOSDEV
disk->bios = DISK_getbiosmetrics(disk->name);
#else
disk->bios = disk->real; /* We aint no stinkin PC */
#endif
/* Can not get geometry, punt */
if(disk->bios == NULL || disk->real == NULL)
return(1);
return(0);
}
int
DISK_printmetrics(disk)
disk_t *disk;
{
if(disk->real)
printf("Disk GEO: %d/%d/%d [%d sectors]\n", disk->real->cylinders,
disk->real->heads, disk->real->sectors, disk->real->size);
else
printf("Disk GEO: <none>\n");
if(disk->bios)
printf("Bios GEO: %d/%d/%d [%d sectors]\n", disk->bios->cylinders,
disk->bios->heads, disk->bios->sectors, disk->bios->size);
else
printf("Bios GEO: <none>\n");
return(0);
}
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