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freebsd-skq/lib/libdisk/create_chunk.c
jkh 5b33a2af7c + 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

444 lines
10 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 <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 <grp.h>
#include <paths.h>
#include <pwd.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(_PATH_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));
}
int
Fixup_FreeBSD_Names(struct disk *d, struct chunk *c)
{
struct chunk *c1, *c3;
int j;
if (!strcmp(c->name, "X")) return 0;
/* reset all names to "X" */
for (c1 = c->part; c1; c1 = c1->next) {
c1->oname = c1->name;
c1->name = malloc(12);
if(!c1->name) return -1;
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;
}
return 0;
}
int
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) return -1;
sprintf(c1->name, "%ss%d", d->chunks->name, j++);
if (c1->type == freebsd)
if (Fixup_FreeBSD_Names(d, c1) != 0)
return -1;
}
return 0;
}
int
Fixup_Names(struct disk *d)
{
struct chunk *c1, *c2;
int i;
#ifdef __i386__
struct chunk *c3;
int j;
#endif
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;
#ifdef __i386__
c2->oname = malloc(12);
if(!c2->oname) return -1;
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);
#else
free(c2->name);
c2->name = strdup(c1->name);
#endif /*__i386__*/
}
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);
#ifndef PC98
if (c2->type == extended)
Fixup_Extended_Names(d, c2);
#endif
}
return 0;
}
int
#ifdef PC98
Create_Chunk(struct disk *d, u_long offset, u_long size, chunk_e type, int subtype, u_long flags, const char *sname)
#else
Create_Chunk(struct disk *d, u_long offset, u_long size, chunk_e type, int subtype, u_long flags)
#endif
{
int i;
u_long l;
if(!(flags & CHUNK_FORCE_ALL))
{
#ifdef PC98
/* Never use the first cylinder */
if (!offset) {
offset += (d->bios_sect * d->bios_hd);
size -= (d->bios_sect * d->bios_hd);
}
#else
/* Never use the first track */
if (!offset) {
offset += d->bios_sect;
size -= d->bios_sect;
}
#endif /* PC98 */
/* Always end on cylinder boundary */
l = (offset+size) % (d->bios_sect * d->bios_hd);
size -= l;
}
#ifdef PC98
i = Add_Chunk(d, offset, size, "X", type, subtype, flags, sname);
#else
i = Add_Chunk(d, offset, size, "X", type, subtype, flags);
#endif
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;
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:
#ifdef PC98
i = Add_Chunk(d, offset, size, "X", type, subtype, flags, "-");
#else
i = Add_Chunk(d, offset, size, "X", type, subtype, flags);
#endif
if (i)
return 0;
Fixup_Names(d);
for (c1=parent->part; c1; c1 = c1->next)
if (c1->offset == offset)
return c1;
/* barfout(1, "Serious internal trouble"); */
return 0;
}
int
MakeDev(struct chunk *c1, const char *path)
{
char *p = c1->name;
u_long cmaj, min, unit, part, slice;
char buf[BUFSIZ], buf2[BUFSIZ];
struct group *grp;
struct passwd *pwd;
uid_t owner;
gid_t group;
*buf2 = '\0';
if (isDebug())
msgDebug("MakeDev: Called with %s on path %s\n", p, path);
if (!strcmp(p, "X"))
return 0;
if (!strncmp(p, "ad", 2))
cmaj = 116, p += 2;
#ifdef PC98
else if (!strncmp(p, "wd", 2))
cmaj = 3, p += 2;
#endif
else if (!strncmp(p, "wfd", 3))
cmaj = 87, p += 3;
else if (!strncmp(p, "afd", 3))
cmaj = 118, p += 3;
else if (!strncmp(p, "fla", 3))
cmaj = 102, p += 3;
else if (!strncmp(p, "idad", 4))
cmaj = 109, p += 4;
else if (!strncmp(p, "mlxd", 4))
cmaj = 131, p += 4;
else if (!strncmp(p, "amrd", 4))
cmaj = 133, p += 4;
else if (!strncmp(p, "twed", 4))
cmaj = 147, p += 4;
else if (!strncmp(p, "aacd", 4))
cmaj = 151, p += 4;
else if (!strncmp(p, "ar", 2)) /* ATA RAID */
cmaj = 157, p += 2;
else if (!strncmp(p, "da", 2)) /* CAM support */
cmaj = 13, p += 2;
else {
msgDebug("MakeDev: Unknown major/minor for devtype %s\n", p);
return 0;
}
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++;
}
#ifndef __alpha__
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;
#else
slice = 0;
#endif
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;
if ((pwd = getpwnam("root")) == NULL) {
if (isDebug())
msgDebug("MakeDev: Unable to lookup user \"root\", using 0.\n");
owner = 0;
} else {
owner = pwd->pw_uid;
}
if ((grp = getgrnam("operator")) == NULL) {
if (isDebug())
msgDebug("MakeDev: Unable to lookup group \"operator\", using 5.\n");
group = 5;
} else {
group = grp->gr_gid;
}
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 (chown(buf, owner, group) == -1) {
msgDebug("chown 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;
}
if (chown(buf, owner, group) == -1) {
msgDebug("chown of %s returned failure status!\n", buf);
return 0;
}
}
sprintf(buf, "%s/%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 (chown(buf, owner, group) == -1) {
msgDebug("chown 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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