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freebsd-dev/lib/libdisk/create_chunk.c

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8.1 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
* ----------------------------------------------------------------------------
*
* $Id: create_chunk.c,v 1.27 1997/02/22 15:06:31 peter Exp $
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <fcntl.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/disklabel.h>
#include <sys/diskslice.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <err.h>
#include "libdisk.h"
/* Clone these two from sysinstall because we need our own copies
* due to link order problems with `crunch'. Feh!
*/
static int
isDebug()
{
static int debug = 0; /* Allow debugger to tweak it */
return debug;
}
/* Write something to the debugging port */
static void
msgDebug(char *fmt, ...)
{
va_list args;
char *dbg;
static int DebugFD = -1;
if (DebugFD == -1)
DebugFD = open("/dev/ttyv1", O_RDWR);
dbg = (char *)alloca(FILENAME_MAX);
strcpy(dbg, "DEBUG: ");
va_start(args, fmt);
vsnprintf((char *)(dbg + strlen(dbg)), FILENAME_MAX, fmt, args);
va_end(args);
write(DebugFD, dbg, strlen(dbg));
}
void
Fixup_FreeBSD_Names(struct disk *d, struct chunk *c)
{
struct chunk *c1, *c3;
int j;
if (!strcmp(c->name, "X")) return;
/* reset all names to "X" */
for (c1 = c->part; c1 ; c1 = c1->next) {
c1->oname = c1->name;
c1->name = malloc(12);
if(!c1->name) err(1,"Malloc failed");
strcpy(c1->name,"X");
}
/* Allocate the first swap-partition we find */
for (c1 = c->part; c1 ; c1 = c1->next) {
if (c1->type == unused) continue;
if (c1->subtype != FS_SWAP) continue;
sprintf(c1->name,"%s%c",c->name,SWAP_PART+'a');
break;
}
/* Allocate the first root-partition we find */
for (c1 = c->part; c1 ; c1 = c1->next) {
if (c1->type == unused) continue;
if (!(c1->flags & CHUNK_IS_ROOT)) continue;
sprintf(c1->name,"%s%c",c->name,0+'a');
break;
}
/* Try to give them the same as they had before */
for (c1 = c->part; c1 ; c1 = c1->next) {
if (strcmp(c1->name,"X")) continue;
for(c3 = c->part; c3 ; c3 = c3->next)
if (c1 != c3 && !strcmp(c3->name, c1->oname)) {
goto newname;
}
strcpy(c1->name,c1->oname);
newname:
}
/* Allocate the rest sequentially */
for (c1 = c->part; c1 ; c1 = c1->next) {
const char order[] = "efghabd";
if (c1->type == unused) continue;
if (strcmp("X",c1->name)) continue;
for(j=0;j<strlen(order);j++) {
sprintf(c1->name,"%s%c",c->name,order[j]);
for(c3 = c->part; c3 ; c3 = c3->next)
if (c1 != c3 && !strcmp(c3->name, c1->name))
goto match;
break;
match:
strcpy(c1->name,"X");
continue;
}
}
for (c1 = c->part; c1 ; c1 = c1->next) {
free(c1->oname);
c1->oname = 0;
}
}
void
Fixup_Extended_Names(struct disk *d, struct chunk *c)
{
struct chunk *c1;
int j=5;
for (c1 = c->part; c1 ; c1 = c1->next) {
if (c1->type == unused) continue;
free(c1->name);
c1->name = malloc(12);
if(!c1->name) err(1,"malloc failed");
sprintf(c1->name,"%ss%d",d->chunks->name,j++);
if (c1->type == freebsd)
Fixup_FreeBSD_Names(d,c1);
}
}
void
Fixup_Names(struct disk *d)
{
struct chunk *c1, *c2, *c3;
int i,j;
c1 = d->chunks;
for(i=1,c2 = c1->part; c2 ; c2 = c2->next) {
c2->flags &= ~CHUNK_BSD_COMPAT;
if (c2->type == unused)
continue;
if (strcmp(c2->name,"X"))
continue;
c2->oname = malloc(12);
if(!c2->oname) err(1,"malloc failed");
for(j=1;j<=NDOSPART;j++) {
sprintf(c2->oname,"%ss%d",c1->name,j);
for(c3 = c1->part; c3 ; c3 = c3->next)
if (c3 != c2 && !strcmp(c3->name, c2->oname))
goto match;
free(c2->name);
c2->name = c2->oname;
c2->oname = 0;
break;
match:
continue;
}
if (c2->oname)
free(c2->oname);
}
for(c2 = c1->part; c2 ; c2 = c2->next) {
if (c2->type == freebsd) {
c2->flags |= CHUNK_BSD_COMPAT;
break;
}
}
for(c2 = c1->part; c2 ; c2 = c2->next) {
if (c2->type == freebsd)
Fixup_FreeBSD_Names(d,c2);
if (c2->type == extended)
Fixup_Extended_Names(d,c2);
}
}
int
Create_Chunk(struct disk *d, u_long offset, u_long size, chunk_e type, int subtype, u_long flags)
{
int i;
u_long l;
if(!(flags & CHUNK_FORCE_ALL))
{
/* Never use the first track */
if (!offset) {
offset += d->bios_sect;
size -= d->bios_sect;
}
/* Always end on cylinder boundary */
l = (offset+size) % (d->bios_sect * d->bios_hd);
size -= l;
}
i = Add_Chunk(d,offset,size,"X",type,subtype,flags);
Fixup_Names(d);
return i;
}
struct chunk *
Create_Chunk_DWIM(struct disk *d, struct chunk *parent , u_long size, chunk_e type, int subtype, u_long flags)
{
int i;
struct chunk *c1;
u_long offset,edge;
if (!parent)
parent = d->chunks;
for (c1=parent->part; c1 ; c1 = c1->next) {
if (c1->type != unused) continue;
if (c1->size < size) continue;
offset = c1->offset;
goto found;
}
return 0;
found:
if (parent->flags & CHUNK_BAD144) {
edge = c1->end - d->bios_sect - 127;
if (offset > edge)
return 0;
if (offset + size > edge)
size = edge - offset + 1;
}
i = Add_Chunk(d,offset,size,"X",type,subtype,flags);
if (i)
return 0;
Fixup_Names(d);
for (c1=parent->part; c1 ; c1 = c1->next)
if (c1->offset == offset)
return c1;
err(1,"Serious internal trouble");
}
int
MakeDev(struct chunk *c1, const char *path)
{
char *p = c1->name;
u_long cmaj, bmaj, min, unit, part, slice;
char buf[BUFSIZ], buf2[BUFSIZ];
*buf2 = '\0';
if (isDebug())
msgDebug("MakeDev: Called with %s on path %s\n", p, path);
if (!strcmp(p, "X"))
return 0;
if (!strncmp(p, "wd", 2))
bmaj = 0, cmaj = 3;
else if (!strncmp(p, "sd", 2))
bmaj = 4, cmaj = 13;
else if (!strncmp(p, "od", 2))
bmaj = 20, cmaj = 70;
else if (!strncmp(p, "da", 2)) /* CAM support */
bmaj = 4, cmaj = 13;
else {
return 0;
}
p += 2;
if (!isdigit(*p)) {
msgDebug("MakeDev: Invalid disk unit passed: %s\n", p);
return 0;
}
unit = *p - '0';
p++;
if (!*p) {
slice = 1;
part = 2;
goto done;
}
else if (isdigit(*p)) {
unit *= 10;
unit += (*p - '0');
p++;
}
if (*p != 's') {
msgDebug("MakeDev: `%s' is not a valid slice delimiter\n", p);
return 0;
}
p++;
if (!isdigit(*p)) {
msgDebug("MakeDev: `%s' is an invalid slice number\n", p);
return 0;
}
slice = *p - '0';
p++;
if (isdigit(*p)) {
slice *= 10;
slice += (*p - '0');
p++;
}
slice = slice + 1;
if (!*p) {
part = 2;
if(c1->type == freebsd)
sprintf(buf2, "%sc", c1->name);
goto done;
}
if (*p < 'a' || *p > 'h') {
msgDebug("MakeDev: `%s' is not a valid partition name.\n", p);
return 0;
}
part = *p - 'a';
done:
if (isDebug())
msgDebug("MakeDev: Unit %d, Slice %d, Part %d\n", unit, slice, part);
if (unit > 32)
return 0;
if (slice > 32)
return 0;
min = unit * 8 + 65536 * slice + part;
sprintf(buf, "%s/r%s", path, c1->name);
unlink(buf);
if (mknod(buf, S_IFCHR|0640, makedev(cmaj,min)) == -1) {
msgDebug("mknod of %s returned failure status!\n", buf);
return 0;
}
if (*buf2) {
sprintf(buf, "%s/r%s", path, buf2);
unlink(buf);
if (mknod(buf, S_IFCHR|0640, makedev(cmaj,min)) == -1) {
msgDebug("mknod of %s returned failure status!\n", buf);
return 0;
}
}
sprintf(buf, "%s/%s", path, c1->name);
unlink(buf);
if (mknod(buf, S_IFBLK|0640, makedev(bmaj,min)) == -1) {
msgDebug("mknod of %s returned failure status!\n", buf);
return 0;
}
return 1;
}
int
MakeDevChunk(struct chunk *c1, const char *path)
{
int i;
i = MakeDev(c1, path);
if (c1->next)
MakeDevChunk(c1->next, path);
if (c1->part)
MakeDevChunk(c1->part, path);
return i;
}
int
MakeDevDisk(struct disk *d, const char *path)
{
return MakeDevChunk(d->chunks, path);
}
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