freebsd-skq/lib/libdisk/write_disk.c

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/*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
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* <phk@FreeBSD.org> 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
* ----------------------------------------------------------------------------
*/
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#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/disklabel.h>
#include <sys/diskslice.h>
#ifdef PC98
#include <sys/diskpc98.h>
#else
#include <sys/diskmbr.h>
#endif
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#include <paths.h>
#include "libdisk.h"
#define DOSPTYP_EXTENDED 5
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#define BBSIZE 8192
#define SBSIZE 0
#define DEF_RPM 3600
#define DEF_INTERLEAVE 1
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#ifdef PC98
#define WHERE(offset,disk) (offset)
#else
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#define WHERE(offset,disk) (disk->flags & DISK_ON_TRACK ? offset + 63 : offset)
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#endif
/* XXX: A lot of hardcoded 512s probably should be foo->sector_size;
I'm not sure which, so I leave it like it worked before. --schweikh */
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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];
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#ifdef __alpha__
u_long *lp, sum;
#endif
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for(i = 0; i < BBSIZE/512; i++) {
p = read_block(fd, WHERE(i + c1->offset, new), 512);
memcpy(buf + 512 * i, p, 512);
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free(p);
}
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#if defined(__i386__)
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if(new->boot1)
memcpy(buf, new->boot1, 512);
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if(new->boot2)
memcpy(buf + 512, new->boot2, BBSIZE-512);
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#elif defined(__alpha__)
if(new->boot1)
memcpy(buf + 512, new->boot1, BBSIZE-512);
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#endif
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dl = (struct disklabel *)(buf + 512 * LABELSECTOR + LABELOFFSET);
memset(dl, 0, sizeof *dl);
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for(c2 = c1->part; c2; c2 = c2->next) {
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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
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if (j < 0 || j >= MAXPARTITIONS || j == RAW_PART) {
#ifdef DEBUG
warn("weird partition letter %c", c2->name[strlen(new->name) + 2]);
#endif
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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;
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}
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;
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strcpy(dl->d_typename, c1->name);
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dl->d_secsize = 512;
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dl->d_secperunit = new->chunks->size;
dl->d_ncylinders = new->bios_cyl;
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dl->d_ntracks = new->bios_hd;
dl->d_nsectors = new->bios_sect;
dl->d_secpercyl = dl->d_ntracks * dl->d_nsectors;
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dl->d_npartitions = MAXPARTITIONS;
dl->d_type = new->name[0] == 's' || new->name[0] == 'd' ||
new->name[0] == 'o' ? DTYPE_SCSI : DTYPE_ESDI;
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dl->d_partitions[RAW_PART].p_size = c1->size;
dl->d_partitions[RAW_PART].p_offset = c1->offset;
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#ifdef PC98
dl->d_rpm = 3600;
dl->d_interleave = 1;
#endif
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#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;
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#endif
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dl->d_magic = DISKMAGIC;
dl->d_magic2 = DISKMAGIC;
dl->d_checksum = dkcksum(dl);
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#ifdef __alpha__
/*
* Tell SRM where the bootstrap is.
*/
lp = (u_long *)buf;
lp[60] = 15;
lp[61] = 1;
lp[62] = 0;
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/*
* 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 /*__alpha__*/
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for(i=0;i<BBSIZE/512;i++) {
write_block(fd,WHERE(i + c1->offset, new), buf + 512 * i, 512);
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}
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return 0;
}
int
Write_Extended(int fd, struct disk *new, struct disk *old, struct chunk *c1)
{
return 0;
}
#if defined(__i386__) && !defined(PC98)
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;
}
#endif
#if defined(__i386__) && !defined(PC98)
/*
* Special install-time configuration for the i386 boot0 boot manager.
*/
static void
Cfg_Boot_Mgr(u_char *mbr, int edd)
{
if (mbr[0x1b0] == 0x66 && mbr[0x1b1] == 0xbb) {
if (edd)
mbr[0x1bb] |= 0x80; /* Packet mode on */
else
mbr[0x1bb] &= 0x7f; /* Packet mode off */
}
}
#endif
int
Write_Disk(struct disk *d1)
{
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int fd,i;
#ifdef __i386__
int j;
#endif
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struct disk *old = 0;
struct chunk *c1;
int ret = 0;
char device[64];
u_char *mbr;
struct dos_partition *dp,work[NDOSPART];
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#ifdef PC98
int s[7];
int PC98_EntireDisk = 0;
#else
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int s[4];
#ifdef __i386__
int need_edd = 0; /* Need EDD (packet interface) */
#endif
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#endif
int one = 1;
int zero = 0;
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strcpy(device,_PATH_DEV);
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strcat(device,d1->name);
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#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
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fd = open(device,O_RDWR);
if (fd < 0) {
#ifdef DEBUG
warn("open(%s) failed", device);
#endif
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return 1;
}
ioctl(fd, DIOCWLABEL, &one);
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memset(s,0,sizeof s);
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#ifdef PC98
mbr = read_block(fd, WHERE(1, d1), d1->sector_size);
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#else
mbr = read_block(fd, WHERE(0, d1), d1->sector_size);
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#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) {
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if (c1->type == unused) continue;
if (!strcmp(c1->name, "X")) continue;
#ifdef __i386__
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j = c1->name[4] - '1';
j = c1->name[strlen(d1->name) + 1] - '1';
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#ifdef PC98
if (j < 0 || j > 7)
#else
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if (j < 0 || j > 3)
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#endif
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continue;
s[j]++;
#endif
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#ifndef PC98
if (c1->type == extended)
ret += Write_Extended(fd, d1, old, c1);
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#endif
if (c1->type == freebsd)
ret += Write_FreeBSD(fd, d1, old, c1);
#ifdef __i386__
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#ifndef PC98
Write_Int32(&dp[j].dp_start, c1->offset);
Write_Int32(&dp[j].dp_size, c1->size);
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#endif
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i = c1->offset;
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#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;
need_edd++;
} else {
dp[j].dp_ssect = i % d1->bios_sect;
i -= dp[j].dp_ssect++;
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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 /* PC98 */
#ifdef DEBUG
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printf("S:%lu = (%x/%x/%x)",
c1->offset, dp[j].dp_scyl, dp[j].dp_shd, dp[j].dp_ssect);
#endif
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i = c1->end;
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#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++;
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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;
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#endif
#ifdef DEBUG
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printf(" E:%lu = (%x/%x/%x)\n",
c1->end, dp[j].dp_ecyl, dp[j].dp_ehd, dp[j].dp_esect);
#endif
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#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;
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#endif
#endif
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}
#ifdef __i386__
j = 0;
for(i = 0; i < NDOSPART; i++) {
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if (!s[i])
memset(dp + i, 0, sizeof *dp);
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#ifndef PC98
if (dp[i].dp_flag)
j++;
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#endif
}
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#ifndef PC98
if (!j)
for(i = 0; i < NDOSPART; i++)
if (dp[i].dp_typ == 0xa5)
dp[i].dp_flag = 0x80;
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#endif
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#ifdef PC98
if (d1->bootipl)
write_block(fd, WHERE(0, d1), d1->bootipl, d1->sector_size);
mbr = read_block(fd, WHERE(1, d1), d1->sector_size);
memcpy(mbr + DOSPARTOFF, dp, sizeof *dp * NDOSPART);
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/* 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, d1->sector_size);
if (d1->bootmenu)
for (i = 0; i * d1->sector_size < d1->bootmenu_size; i++)
write_block(fd, WHERE(2 + i, d1), &d1->bootmenu[i * d1->sector_size], d1->sector_size);
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#else
mbr = read_block(fd, WHERE(0, d1), d1->sector_size);
if (d1->bootmgr) {
memcpy(mbr, d1->bootmgr, DOSPARTOFF);
Cfg_Boot_Mgr(mbr, need_edd);
}
memcpy(mbr + DOSPARTOFF, dp, sizeof *dp * NDOSPART);
mbr[512-2] = 0x55;
mbr[512-1] = 0xaa;
write_block(fd, WHERE(0, d1), mbr, d1->sector_size);
if (d1->bootmgr && d1->bootmgr_size > d1->sector_size)
for(i = 1; i * d1->sector_size <= d1->bootmgr_size; i++)
write_block(fd, WHERE(i, d1), &d1->bootmgr[i * d1->sector_size], d1->sector_size);
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#endif
#endif
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i = 1;
i = ioctl(fd, DIOCSYNCSLICEINFO, &i);
#ifdef DEBUG
if (i != 0)
warn("ioctl(DIOCSYNCSLICEINFO)");
#endif
ioctl(fd, DIOCWLABEL, &zero);
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close(fd);
return 0;
}