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mirror of https://git.FreeBSD.org/src.git synced 2024-12-23 11:18:54 +00:00
freebsd/lib/libdisk/create_chunk.c
1995-06-11 19:33:05 +00:00

298 lines
6.3 KiB
C

/*
* ----------------------------------------------------------------------------
* "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 1.20.2.1 1995/05/31 23:53:45 jkh Exp $
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <ctype.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"
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;
/* 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;
}
warn("Not enough unused space");
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) {
warn("Didn't cut it");
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, char *path)
{
char *p = c1->name;
u_long cmaj,bmaj,min,unit,part,slice;
char buf[BUFSIZ],buf2[BUFSIZ];
*buf2 = '\0';
if(!strcmp(p,"X"))
return 0;
if (p[0] == 'w' && p[1] == 'd') {
bmaj = 0; cmaj = 3;
} else if (p[0] == 's' && p[1] == 'd') {
bmaj = 4; cmaj = 13;
} else {
return 0;
}
p += 2;
if (!isdigit(*p))
return 0;
unit = *p - '0';
p++;
if (isdigit(*p)) {
unit *= 10;
unit = *p - '0';
p++;
}
if (!*p) {
slice = 1;
part = 2;
goto done;
}
if (*p != 's')
return 0;
p++;
if (!isdigit(*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')
return 0;
part = *p - 'a';
done:
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); mknod(buf,S_IFCHR|0640,makedev(cmaj,min));
if(*buf2) {
sprintf(buf,"%s/r%s",path,buf2);
unlink(buf); mknod(buf,S_IFCHR|0640,makedev(cmaj,min));
}
sprintf(buf,"%s/%s",path,c1->name);
unlink(buf); mknod(buf,S_IFBLK|0640,makedev(bmaj,min));
return 1;
}
void
MakeDevChunk(struct chunk *c1,char *path)
{
MakeDev(c1,path);
if (c1->next) MakeDevChunk(c1->next,path);
if (c1->part) MakeDevChunk(c1->part,path);
}
void
MakeDevDisk(struct disk *d,char *path)
{
MakeDevChunk(d->chunks,path);
}