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freebsd-dev/lib/libdisk/disk.c
Jordan K. Hubbard 96e426f43d + add u_long sector_size to struct disk (documented in libdisk.3) 
+ make Open_Disk sense the sector size by trying 512, 1024 and 2048
  in this order. This makes the kernel note that
  dscheck(cd1): bio_bcount 512 is not on a sector boundary (ssize 2048)
  dscheck(cd1): bio_bcount 1024 is not on a sector boundary (ssize 2048)
  if 2048 is the sector size. If this worries anyone: the message is from
  /usr/src/sys/kern/subr_diskslice.c and shutups are to be placed there.
+ Have read_block and write_block use an additional parameter, the
  sector size.
+ replace all barfout calls with return NULL, 0, __LINE__, etc.
  Note that this does NOT emit diagnostics. More often than not,
  you don't want library functions to scribble on stderr -- it may
  not even be available. The right thing is to propagate the error
  condition to upper management. The app should take care of errors.
+ use d1->sector_size instead of 512 in various places. I've left many
  places untouched, especially those writing MBRs. I simply added
  another arg hardcoded as 512. This is because I would not know what
  I'm doing... I felt this approach would be reasonably backward
  compatible and not introduce any new bugs in critical software.
  Famous last words. Messing with MBRs might soon put me in the same
  screwup meister category as, uh, never mind.  :-)
+ bump the max no of disks from 20 to 32 (due to PR 24503).

PR:		8434 / 8436 / 24503
Submitted by:	Jens Schweikhardt <schweikh@schweikhardt.net>
2001-05-13 20:08:54 +00:00

665 lines
14 KiB
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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/sysctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/disklabel.h>
#include <sys/diskslice.h>
#include <paths.h>
#include "libdisk.h"
#define DOSPTYP_EXTENDED 5
#define DOSPTYP_ONTRACK 84
const char *chunk_n[] = {
"whole",
"unknown",
"fat",
"freebsd",
"extended",
"part",
"unused",
NULL
};
struct disk *
Open_Disk(const char *name)
{
return Int_Open_Disk(name, 0);
}
#ifndef PC98
static u_int32_t
Read_Int32(u_int32_t *p)
{
u_int8_t *bp = (u_int8_t *)p;
return bp[0] | (bp[1] << 8) | (bp[2] << 16) | (bp[3] << 24);
}
#endif
struct disk *
Int_Open_Disk(const char *name, u_long size)
{
int i,fd;
struct diskslices ds;
struct disklabel dl;
char device[64], *buf;
struct disk *d;
u_long sector_size;
#ifdef PC98
unsigned char *p;
#else
struct dos_partition *dp;
void *p;
#endif
u_long offset = 0;
strcpy(device, _PATH_DEV);
strcat(device, name);
d = (struct disk *)malloc(sizeof *d);
if(!d) return NULL;
memset(d, 0, sizeof *d);
fd = open(device, O_RDONLY);
if (fd < 0) {
#ifdef DEBUG
warn("open(%s) failed", device);
#endif
return 0;
}
memset(&dl, 0, sizeof dl);
ioctl(fd, DIOCGDINFO, &dl);
i = ioctl(fd, DIOCGSLICEINFO, &ds);
if (i < 0) {
#ifdef DEBUG
warn("DIOCGSLICEINFO(%s) failed", device);
#endif
close(fd);
return 0;
}
#ifdef DEBUG
for(i = 0; i < ds.dss_nslices; i++)
if(ds.dss_slices[i].ds_openmask)
printf(" open(%d)=0x%2x",
i, ds.dss_slices[i].ds_openmask);
printf("\n");
#endif
/* XXX --- ds.dss_slice[WHOLE_DISK_SLICE].ds.size of MO disk is wrong!!! */
#ifdef PC98
if (!size)
size = dl.d_ncylinders * dl.d_ntracks * dl.d_nsectors;
#else
if (!size)
size = ds.dss_slices[WHOLE_DISK_SLICE].ds_size;
#endif
/* determine media sector size */
if ((buf = malloc(MAX_SEC_SIZE)) == NULL)
return NULL;
for (sector_size = MIN_SEC_SIZE; sector_size <= MAX_SEC_SIZE; sector_size *= 2) {
if (read(fd, buf, sector_size) == sector_size) {
d->sector_size = sector_size;
break;
}
}
free (buf);
if (sector_size > MAX_SEC_SIZE)
return NULL; /* could not determine sector size */
#ifdef PC98
p = (unsigned char*)read_block(fd, 1, sector_size);
#else
p = read_block(fd, 0, sector_size);
dp = (struct dos_partition*)(p + DOSPARTOFF);
for (i = 0; i < NDOSPART; i++) {
if (Read_Int32(&dp->dp_start) >= size)
continue;
if (Read_Int32(&dp->dp_start) + Read_Int32(&dp->dp_size) >= size)
continue;
if (!Read_Int32(&dp->dp_size))
continue;
if (dp->dp_typ == DOSPTYP_ONTRACK) {
d->flags |= DISK_ON_TRACK;
offset = 63;
}
}
free(p);
#endif
d->bios_sect = dl.d_nsectors;
d->bios_hd = dl.d_ntracks;
d->name = strdup(name);
if (dl.d_ntracks && dl.d_nsectors)
d->bios_cyl = size / (dl.d_ntracks * dl.d_nsectors);
#ifdef PC98
if (Add_Chunk(d, -offset, size, name, whole, 0, 0, "-"))
#else
if (Add_Chunk(d, -offset, size, name, whole, 0, 0))
#endif
#ifdef DEBUG
warn("Failed to add 'whole' chunk");
#else
{}
#endif
#ifdef __i386__
#ifdef PC98
/* XXX -- Quick Hack!
* Check MS-DOS MO
*/
if ((*p == 0xf0 || *p == 0xf8) &&
(*(p+1) == 0xff) &&
(*(p+2) == 0xff)) {
Add_Chunk(d, 0, size, name, fat, 0xa0a0, 0, name);
free(p);
goto pc98_mo_done;
}
free(p);
#endif /* PC98 */
for(i=BASE_SLICE;i<ds.dss_nslices;i++) {
char sname[20];
chunk_e ce;
u_long flags=0;
int subtype=0;
if (! ds.dss_slices[i].ds_size)
continue;
ds.dss_slices[i].ds_offset -= offset;
sprintf(sname, "%ss%d", name, i - 1);
#ifdef PC98
subtype = ds.dss_slices[i].ds_type |
ds.dss_slices[i].ds_subtype << 8;
switch (ds.dss_slices[i].ds_type & 0x7f) {
case 0x14:
ce = freebsd;
break;
case 0x20:
case 0x21:
case 0x22:
case 0x23:
case 0x24:
ce = fat;
break;
#else /* IBM-PC */
subtype = ds.dss_slices[i].ds_type;
switch (ds.dss_slices[i].ds_type) {
case 0xa5:
ce = freebsd;
break;
case 0x1:
case 0x6:
case 0x4:
case 0xb:
case 0xc:
case 0xe:
ce = fat;
break;
case DOSPTYP_EXTENDED:
case 0xf:
ce = extended;
break;
#endif
default:
ce = unknown;
break;
}
#ifdef PC98
if (Add_Chunk(d, ds.dss_slices[i].ds_offset,
ds.dss_slices[i].ds_size, sname, ce, subtype, flags,
ds.dss_slices[i].ds_name))
#else
if (Add_Chunk(d, ds.dss_slices[i].ds_offset,
ds.dss_slices[i].ds_size, sname, ce, subtype, flags))
#endif
#ifdef DEBUG
warn("failed to add chunk for slice %d", i - 1);
#else
{}
#endif
#ifdef PC98
if ((ds.dss_slices[i].ds_type & 0x7f) != 0x14)
#else
if (ds.dss_slices[i].ds_type != 0xa5)
#endif
continue;
{
struct disklabel dl;
char pname[20];
int j, k;
strcpy(pname, _PATH_DEV);
strcat(pname, sname);
j = open(pname, O_RDONLY);
if (j < 0) {
#ifdef DEBUG
warn("open(%s)", pname);
#endif
continue;
}
k = ioctl(j, DIOCGDINFO, &dl);
if (k < 0) {
#ifdef DEBUG
warn("ioctl(%s, DIOCGDINFO)", pname);
#endif
close(j);
continue;
}
close(j);
for(j = 0; j <= dl.d_npartitions; j++) {
if (j == RAW_PART)
continue;
if (j == 3)
continue;
if (j == dl.d_npartitions) {
j = 3;
dl.d_npartitions = 0;
}
if (!dl.d_partitions[j].p_size)
continue;
if (dl.d_partitions[j].p_size +
dl.d_partitions[j].p_offset >
ds.dss_slices[i].ds_size)
continue;
sprintf(pname, "%s%c", sname, j + 'a');
if (Add_Chunk(d,
dl.d_partitions[j].p_offset +
ds.dss_slices[i].ds_offset,
dl.d_partitions[j].p_size,
pname,part,
dl.d_partitions[j].p_fstype,
#ifdef PC98
0,
ds.dss_slices[i].ds_name) && j != 3)
#else
0) && j != 3)
#endif
#ifdef DEBUG
warn(
"Failed to add chunk for partition %c [%lu,%lu]",
j + 'a', dl.d_partitions[j].p_offset,
dl.d_partitions[j].p_size);
#else
{}
#endif
}
}
}
#endif /* __i386__ */
#ifdef __alpha__
{
struct disklabel dl;
char pname[20];
int j,k;
strcpy(pname, _PATH_DEV);
strcat(pname, name);
j = open(pname, O_RDONLY);
if (j < 0) {
#ifdef DEBUG
warn("open(%s)", pname);
#endif
goto nolabel;
}
k = ioctl(j, DIOCGDINFO, &dl);
if (k < 0) {
#ifdef DEBUG
warn("ioctl(%s, DIOCGDINFO)", pname);
#endif
close(j);
goto nolabel;
}
close(j);
All_FreeBSD(d, 1);
for(j = 0; j <= dl.d_npartitions; j++) {
if (j == RAW_PART)
continue;
if (j == 3)
continue;
if (j == dl.d_npartitions) {
j = 3;
dl.d_npartitions = 0;
}
if (!dl.d_partitions[j].p_size)
continue;
if (dl.d_partitions[j].p_size +
dl.d_partitions[j].p_offset >
ds.dss_slices[WHOLE_DISK_SLICE].ds_size)
continue;
sprintf(pname, "%s%c", name, j + 'a');
if (Add_Chunk(d,
dl.d_partitions[j].p_offset,
dl.d_partitions[j].p_size,
pname,part,
dl.d_partitions[j].p_fstype,
0) && j != 3)
#ifdef DEBUG
warn(
"Failed to add chunk for partition %c [%lu,%lu]",
j + 'a', dl.d_partitions[j].p_offset,
dl.d_partitions[j].p_size);
#else
{}
#endif
}
nolabel:;
}
#endif /* __alpha__ */
#ifdef PC98
pc98_mo_done:
#endif
close(fd);
Fixup_Names(d);
return d;
}
void
Debug_Disk(struct disk *d)
{
printf("Debug_Disk(%s)", d->name);
printf(" flags=%lx", d->flags);
#if 0
printf(" real_geom=%lu/%lu/%lu", d->real_cyl, d->real_hd, d->real_sect);
#endif
printf(" bios_geom=%lu/%lu/%lu = %lu\n",
d->bios_cyl, d->bios_hd, d->bios_sect,
d->bios_cyl * d->bios_hd * d->bios_sect);
#if defined(PC98)
printf(" boot1=%p, boot2=%p, bootipl=%p, bootmenu=%p\n",
d->boot1, d->boot2, d->bootipl, d->bootmenu);
#elif defined(__i386__)
printf(" boot1=%p, boot2=%p, bootmgr=%p\n",
d->boot1, d->boot2, d->bootmgr);
#elif defined(__alpha__)
printf(" boot1=%p, bootmgr=%p\n",
d->boot1, d->bootmgr);
#endif
Debug_Chunk(d->chunks);
}
void
Free_Disk(struct disk *d)
{
if(d->chunks) Free_Chunk(d->chunks);
if(d->name) free(d->name);
#ifdef PC98
if(d->bootipl) free(d->bootipl);
if(d->bootmenu) free(d->bootmenu);
#else
if(d->bootmgr) free(d->bootmgr);
#endif
if(d->boot1) free(d->boot1);
#if defined(__i386__)
if(d->boot2) free(d->boot2);
#endif
free(d);
}
struct disk *
Clone_Disk(struct disk *d)
{
struct disk *d2;
d2 = (struct disk*) malloc(sizeof *d2);
if(!d2) return NULL;
*d2 = *d;
d2->name = strdup(d2->name);
d2->chunks = Clone_Chunk(d2->chunks);
#ifdef PC98
if(d2->bootipl) {
d2->bootipl = malloc(d2->bootipl_size);
memcpy(d2->bootipl, d->bootipl, d2->bootipl_size);
}
if(d2->bootmenu) {
d2->bootmenu = malloc(d2->bootmenu_size);
memcpy(d2->bootmenu, d->bootmenu, d2->bootmenu_size);
}
#else
if(d2->bootmgr) {
d2->bootmgr = malloc(d2->bootmgr_size);
memcpy(d2->bootmgr, d->bootmgr, d2->bootmgr_size);
}
#endif
#if defined(__i386__)
if(d2->boot1) {
d2->boot1 = malloc(512);
memcpy(d2->boot1, d->boot1, 512);
}
if(d2->boot2) {
d2->boot2 = malloc(512 * 15);
memcpy(d2->boot2, d->boot2, 512 * 15);
}
#elif defined(__alpha__)
if(d2->boot1) {
d2->boot1 = malloc(512 * 15);
memcpy(d2->boot1, d->boot1, 512 * 15);
}
#endif
return d2;
}
#if 0
void
Collapse_Disk(struct disk *d)
{
while(Collapse_Chunk(d, d->chunks))
;
}
#endif
#ifdef PC98
static char * device_list[] = {"wd", "aacd", "ad", "da", "afd", "fla", "idad", "mlxd", "amrd", "twed", "ar", "fd", 0};
#else
static char * device_list[] = {"aacd", "ad", "da", "afd", "fla", "idad", "mlxd", "amrd", "twed", "ar", "fd", 0};
#endif
char **
Disk_Names()
{
int i,j,k;
char disk[25];
char diskname[25];
struct stat st;
struct diskslices ds;
int fd;
static char **disks;
int error;
size_t listsize;
char *disklist, **dp;
disks = malloc(sizeof *disks * (1 + MAX_NO_DISKS));
memset(disks,0,sizeof *disks * (1 + MAX_NO_DISKS));
error = sysctlbyname("kern.disks", NULL, &listsize, NULL, 0);
if (!error) {
disklist = (char *)malloc(listsize);
error = sysctlbyname("kern.disks", disklist, &listsize, NULL, 0);
if (error)
return NULL;
k = 0;
for (dp = disks; ((*dp = strsep(&disklist, " ")) != NULL) && k < MAX_NO_DISKS; k++, dp++);
return disks;
}
warn("kern.disks sysctl not available");
k = 0;
for (j = 0; device_list[j]; j++) {
for (i = 0; i < MAX_NO_DISKS; i++) {
sprintf(diskname, "%s%d", device_list[j], i);
sprintf(disk, _PATH_DEV"%s", diskname);
if (stat(disk, &st) || !(st.st_mode & S_IFCHR))
continue;
if ((fd = open(disk, O_RDWR)) == -1)
continue;
if (ioctl(fd, DIOCGSLICEINFO, &ds) == -1) {
#ifdef DEBUG
warn("DIOCGSLICEINFO %s", disk);
#endif
close(fd);
continue;
}
close(fd);
disks[k++] = strdup(diskname);
if(k == MAX_NO_DISKS)
return disks;
}
}
return disks;
}
#ifdef PC98
void
Set_Boot_Mgr(struct disk *d, const u_char *bootipl, const size_t bootipl_size,
const u_char *bootmenu, const size_t bootmenu_size)
#else
void
Set_Boot_Mgr(struct disk *d, const u_char *b, const size_t s)
#endif
{
#ifdef PC98
if (bootipl_size % d->sector_size != 0)
return;
if (d->bootipl)
free(d->bootipl);
if (!bootipl) {
d->bootipl = NULL;
} else {
d->bootipl_size = bootipl_size;
d->bootipl = malloc(bootipl_size);
if(!d->bootipl) return;
memcpy(d->bootipl, bootipl, bootipl_size);
}
if (bootmenu_size % d->sector_size != 0)
return;
if (d->bootmenu)
free(d->bootmenu);
if (!bootmenu) {
d->bootmenu = NULL;
} else {
d->bootmenu_size = bootmenu_size;
d->bootmenu = malloc(bootmenu_size);
if(!d->bootmenu) return;
memcpy(d->bootmenu, bootmenu, bootmenu_size);
}
#else
if (s % d->sector_size != 0)
return;
if (d->bootmgr)
free(d->bootmgr);
if (!b) {
d->bootmgr = NULL;
} else {
d->bootmgr_size = s;
d->bootmgr = malloc(s);
if(!d->bootmgr) return;
memcpy(d->bootmgr, b, s);
}
#endif
}
int
Set_Boot_Blocks(struct disk *d, const u_char *b1, const u_char *b2)
{
#if defined(__i386__)
if (d->boot1) free(d->boot1);
d->boot1 = malloc(512);
if(!d->boot1) return -1;
memcpy(d->boot1, b1, 512);
if (d->boot2) free(d->boot2);
d->boot2 = malloc(15 * 512);
if(!d->boot2) return -1;
memcpy(d->boot2, b2, 15 * 512);
#elif defined(__alpha__)
if (d->boot1) free(d->boot1);
d->boot1 = malloc(15 * 512);
if(!d->boot1) return -1;
memcpy(d->boot1, b1, 15 * 512);
#endif
return 0;
}
const char *
slice_type_name( int type, int subtype )
{
switch (type) {
case 0: return "whole";
#ifndef PC98
case 1: switch (subtype) {
case 1: return "fat (12-bit)";
case 2: return "XENIX /";
case 3: return "XENIX /usr";
case 4: return "fat (16-bit,<=32Mb)";
case 5: return "extended DOS";
case 6: return "fat (16-bit,>32Mb)";
case 7: return "NTFS/HPFS/QNX";
case 8: return "AIX bootable";
case 9: return "AIX data";
case 10: return "OS/2 bootmgr";
case 11: return "fat (32-bit)";
case 12: return "fat (32-bit,LBA)";
case 14: return "fat (16-bit,>32Mb,LBA)";
case 15: return "extended DOS, LBA";
case 18: return "Compaq Diagnostic";
case 84: return "OnTrack diskmgr";
case 100: return "Netware 2.x";
case 101: return "Netware 3.x";
case 115: return "SCO UnixWare";
case 128: return "Minix 1.1";
case 129: return "Minix 1.5";
case 130: return "linux_swap";
case 131: return "ext2fs";
case 166: return "OpenBSD FFS"; /* 0xA6 */
case 169: return "NetBSD FFS"; /* 0xA9 */
case 182: return "OpenBSD"; /* dedicated */
case 183: return "bsd/os";
case 184: return "bsd/os swap";
default: return "unknown";
}
#endif
case 2: return "fat";
case 3: switch (subtype) {
#ifdef PC98
case 0xc494: return "freebsd";
#else
case 165: return "freebsd";
#endif
default: return "unknown";
}
#ifndef PC98
case 4: return "extended";
case 5: return "part";
case 6: return "unused";
#endif
default: return "unknown";
}
}
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