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freebsd-skq/lib/libdisk/write_disk.c
msmith 2dbe92be83 /dev/rXXX -> /dev/XXX 
This should fix sysinstall and other tools that don't expect the 'r' devices
to exist anymore (and thus don't create them).
2000-05-31 00:51:57 +00:00

370 lines
8.0 KiB
C
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/*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <phk@login.dknet.dk> wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
* ----------------------------------------------------------------------------
*
* $FreeBSD$
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <err.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/disklabel.h>
#include <sys/diskslice.h>
#include "libdisk.h"
#define DOSPTYP_EXTENDED 5
#define BBSIZE 8192
#define SBSIZE 8192
#define DEF_RPM 3600
#define DEF_INTERLEAVE 1
#ifdef PC98
#define WHERE(offset,disk) (offset)
#else
#define WHERE(offset,disk) (disk->flags & DISK_ON_TRACK ? offset + 63 : offset)
#endif
int
Write_FreeBSD(int fd, struct disk *new, struct disk *old, struct chunk *c1)
{
struct disklabel *dl;
struct chunk *c2;
int i,j;
void *p;
u_char buf[BBSIZE];
#ifdef __alpha__
u_long *lp, sum;
#endif
for(i=0;i<BBSIZE/512;i++) {
p = read_block(fd,WHERE(i + c1->offset,new));
memcpy(buf+512*i,p,512);
free(p);
}
#if defined(__i386__)
if(new->boot1)
memcpy(buf,new->boot1,512);
if(new->boot2)
memcpy(buf+512,new->boot2,BBSIZE-512);
#elif defined(__alpha__)
if(new->boot1)
memcpy(buf+512,new->boot1,BBSIZE-512);
#endif
dl = (struct disklabel *) (buf+512*LABELSECTOR+LABELOFFSET);
memset(dl,0,sizeof *dl);
for(c2=c1->part;c2;c2=c2->next) {
if (c2->type == unused) continue;
if (!strcmp(c2->name,"X")) continue;
#ifdef __alpha__
j = c2->name[strlen(c2->name) - 1] - 'a';
#else
j = c2->name[strlen(new->name) + 2] - 'a';
#endif
if (j < 0 || j >= MAXPARTITIONS || j == RAW_PART) {
#ifdef DEBUG
warn("weird partition letter %c",c2->name[strlen(new->name) + 2]);
#endif
continue;
}
dl->d_partitions[j].p_size = c2->size;
dl->d_partitions[j].p_offset = c2->offset;
dl->d_partitions[j].p_fstype = c2->subtype;
}
dl->d_bbsize = BBSIZE;
/*
* Add in defaults for superblock size, interleave, and rpms
*/
dl->d_sbsize = SBSIZE;
dl->d_interleave = DEF_INTERLEAVE;
dl->d_rpm = DEF_RPM;
strcpy(dl->d_typename,c1->name);
dl->d_secsize = 512;
dl->d_secperunit = new->chunks->size;
dl->d_ncylinders = new->bios_cyl;
dl->d_ntracks = new->bios_hd;
dl->d_nsectors = new->bios_sect;
dl->d_secpercyl = dl->d_ntracks * dl->d_nsectors;
dl->d_npartitions = MAXPARTITIONS;
dl->d_type = new->name[0] == 's' || new->name[0] == 'd' ||
new->name[0] == 'o' ? DTYPE_SCSI : DTYPE_ESDI;
dl->d_partitions[RAW_PART].p_size = c1->size;
dl->d_partitions[RAW_PART].p_offset = c1->offset;
#ifdef PC98
dl->d_rpm = 3600;
dl->d_interleave = 1;
#endif
#ifndef PC98
if(new->flags & DISK_ON_TRACK)
for(i=0;i<MAXPARTITIONS;i++)
if (dl->d_partitions[i].p_size)
dl->d_partitions[i].p_offset += 63;
#endif
dl->d_magic = DISKMAGIC;
dl->d_magic2 = DISKMAGIC;
dl->d_checksum = dkcksum(dl);
#ifdef __alpha__
/*
* Tell SRM where the bootstrap is.
*/
lp = (u_long *)buf;
lp[60] = 15;
lp[61] = 1;
lp[62] = 0;
/*
* Generate the bootblock checksum for the SRM console.
*/
for (lp = (u_long *)buf, i = 0, sum = 0; i < 63; i++)
sum += lp[i];
lp[63] = sum;
#endif
for(i=0;i<BBSIZE/512;i++) {
write_block(fd,WHERE(i + c1->offset,new),buf+512*i);
}
return 0;
}
int
Write_Extended(int fd, struct disk *new, struct disk *old, struct chunk *c1)
{
return 0;
}
static void
Write_Int32(u_int32_t *p, u_int32_t v)
{
u_int8_t *bp = (u_int8_t *)p;
bp[0] = (v >> 0) & 0xff;
bp[1] = (v >> 8) & 0xff;
bp[2] = (v >> 16) & 0xff;
bp[3] = (v >> 24) & 0xff;
}
int
Write_Disk(struct disk *d1)
{
int fd,i,j;
struct disk *old = 0;
struct chunk *c1;
int ret = 0;
char device[64];
u_char *mbr;
struct dos_partition *dp,work[NDOSPART];
#ifdef PC98
int s[7];
int PC98_EntireDisk = 0;
#else
int s[4];
#endif
int one = 1;
int zero = 0;
strcpy(device,"/dev/");
strcat(device,d1->name);
#ifdef PC98
/* XXX - for entire FreeBSD(98) */
for (c1 = d1->chunks->part; c1; c1 = c1->next) {
if ((c1->type == freebsd) || (c1->offset == 0))
device[9] = 0;
}
#endif
fd = open(device,O_RDWR);
if (fd < 0) {
#ifdef DEBUG
warn("open(%s) failed",device);
#endif
return 1;
}
ioctl(fd, DIOCWLABEL, &one);
memset(s,0,sizeof s);
#ifdef PC98
mbr = read_block(fd,WHERE(1,d1));
#else
mbr = read_block(fd,WHERE(0,d1));
#endif
dp = (struct dos_partition*) (mbr + DOSPARTOFF);
memcpy(work,dp,sizeof work);
dp = work;
free(mbr);
for (c1=d1->chunks->part; c1 ; c1 = c1->next) {
if (c1->type == unused) continue;
if (!strcmp(c1->name,"X")) continue;
#ifndef __alpha__
j = c1->name[4] - '1';
j = c1->name[strlen(d1->name) + 1] - '1';
#ifdef PC98
if (j < 0 || j > 7)
#else
if (j < 0 || j > 3)
#endif
continue;
s[j]++;
#endif
#ifndef PC98
if (c1->type == extended)
ret += Write_Extended(fd, d1,old,c1);
#endif
if (c1->type == freebsd)
ret += Write_FreeBSD(fd, d1,old,c1);
#ifndef __alpha__
#ifndef PC98
Write_Int32(&dp[j].dp_start, c1->offset);
Write_Int32(&dp[j].dp_size, c1->size);
#endif
i = c1->offset;
#ifdef PC98
dp[j].dp_ssect = dp[j].dp_ipl_sct = i % d1->bios_sect;
i -= dp[j].dp_ssect;
i /= d1->bios_sect;
dp[j].dp_shd = dp[j].dp_ipl_head = i % d1->bios_hd;
i -= dp[j].dp_shd;
i /= d1->bios_hd;
dp[j].dp_scyl = dp[j].dp_ipl_cyl = i;
#else
if (i >= 1024*d1->bios_sect*d1->bios_hd) {
dp[j].dp_ssect = 0xff;
dp[j].dp_shd = 0xff;
dp[j].dp_scyl = 0xff;
} else {
dp[j].dp_ssect = i % d1->bios_sect;
i -= dp[j].dp_ssect++;
i /= d1->bios_sect;
dp[j].dp_shd = i % d1->bios_hd;
i -= dp[j].dp_shd;
i /= d1->bios_hd;
dp[j].dp_scyl = i;
i -= dp[j].dp_scyl;
dp[j].dp_ssect |= i >> 2;
}
#endif
#ifdef DEBUG
printf("S:%lu = (%x/%x/%x)",
c1->offset,dp[j].dp_scyl,dp[j].dp_shd,dp[j].dp_ssect);
#endif
i = c1->end;
#ifdef PC98
#if 1
dp[j].dp_esect = dp[j].dp_ehd = 0;
dp[j].dp_ecyl = i / (d1->bios_sect * d1->bios_hd);
#else
dp[j].dp_esect = i % d1->bios_sect;
i -= dp[j].dp_esect;
i /= d1->bios_sect;
dp[j].dp_ehd = i % d1->bios_hd;
i -= dp[j].dp_ehd;
i /= d1->bios_hd;
dp[j].dp_ecyl = i;
#endif
#else
dp[j].dp_esect = i % d1->bios_sect;
i -= dp[j].dp_esect++;
i /= d1->bios_sect;
dp[j].dp_ehd = i % d1->bios_hd;
i -= dp[j].dp_ehd;
i /= d1->bios_hd;
if (i>1023) i = 1023;
dp[j].dp_ecyl = i;
i -= dp[j].dp_ecyl;
dp[j].dp_esect |= i >> 2;
#endif
#ifdef DEBUG
printf(" E:%lu = (%x/%x/%x)\n",
c1->end,dp[j].dp_ecyl,dp[j].dp_ehd,dp[j].dp_esect);
#endif
#ifdef PC98
dp[j].dp_mid = c1->subtype & 0xff;
dp[j].dp_sid = c1->subtype >> 8;
if (c1->flags & CHUNK_ACTIVE)
dp[j].dp_mid |= 0x80;
strncpy(dp[j].dp_name, c1->sname, 16);
#else
dp[j].dp_typ = c1->subtype;
if (c1->flags & CHUNK_ACTIVE)
dp[j].dp_flag = 0x80;
else
dp[j].dp_flag = 0;
#endif
#endif
}
#ifndef __alpha__
j = 0;
for(i=0;i<NDOSPART;i++) {
if (!s[i])
memset(dp+i,0,sizeof *dp);
#ifndef PC98
if (dp[i].dp_flag)
j++;
#endif
}
#ifndef PC98
if (!j)
for(i=0;i<NDOSPART;i++)
if (dp[i].dp_typ == 0xa5)
dp[i].dp_flag = 0x80;
#endif
#ifdef PC98
mbr = read_block(fd,WHERE(1,d1));
memcpy(mbr+DOSPARTOFF,dp,sizeof *dp * NDOSPART);
/* XXX - for entire FreeBSD(98) */
for (c1 = d1->chunks->part; c1; c1 = c1->next)
if (((c1->type == freebsd) || (c1->type == fat))
&& (c1->offset == 0))
PC98_EntireDisk = 1;
if (PC98_EntireDisk == 0)
write_block(fd,WHERE(1,d1),mbr);
#else
mbr = read_block(fd,WHERE(0,d1));
if (d1->bootmgr)
memcpy(mbr,d1->bootmgr,DOSPARTOFF);
memcpy(mbr+DOSPARTOFF,dp,sizeof *dp * NDOSPART);
mbr[512-2] = 0x55;
mbr[512-1] = 0xaa;
write_block(fd,WHERE(0,d1),mbr);
#endif
#endif
i = 1;
i = ioctl(fd,DIOCSYNCSLICEINFO,&i);
#ifdef DEBUG
if (i != 0)
warn("ioctl(DIOCSYNCSLICEINFO)");
#endif
ioctl(fd, DIOCWLABEL, &zero);
close(fd);
return 0;
}
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