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This basically allows you to stick a disklabel on any partition.

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For it to be useful, you must stick your disklabel on the partition which
starts where the MBR says FreeBSD lives.  If you don't do that, you might
get a bad day.

Oh, that probably also means that putting swap there is a bad idea...
This commit is contained in:
Poul-Henning Kamp 1994-10-17 02:31:33 +00:00
parent e57dc19458
commit 1be9232f73
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=3653
2 changed files with 8 additions and 2 deletions
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5
sys/kern/subr_disklabel.c
View file

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)ufs_disksubr.c 8.5 (Berkeley) 1/21/94
* $Id: ufs_disksubr.c,v 1.3 1994/08/02 07:54:53 davidg Exp $
* $Id: ufs_disksubr.c,v 1.4 1994/10/08 06:57:23 phk Exp $
*/
#include <sys/param.h>
@ -361,11 +361,14 @@ writedisklabel(dev, strat, lp)
int error = 0;
labelpart = dkpart(dev);
/* XXX this is wrong. But leaving it in is worse. */
#ifndef __FREEBSD__
if (lp->d_partitions[labelpart].p_offset != 0) {
if (lp->d_partitions[0].p_offset != 0)
return (EXDEV); /* not quite right */
labelpart = 0;
}
#endif
bp = geteblk((int)lp->d_secsize);
bp->b_dev = makedev(major(dev), dkminor(dkunit(dev), labelpart));
bp->b_blkno = LABELSECTOR;

5
sys/ufs/ufs/ufs_disksubr.c
View file

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)ufs_disksubr.c 8.5 (Berkeley) 1/21/94
* $Id: ufs_disksubr.c,v 1.3 1994/08/02 07:54:53 davidg Exp $
* $Id: ufs_disksubr.c,v 1.4 1994/10/08 06:57:23 phk Exp $
*/
#include <sys/param.h>
@ -361,11 +361,14 @@ writedisklabel(dev, strat, lp)
int error = 0;
labelpart = dkpart(dev);
/* XXX this is wrong. But leaving it in is worse. */
#ifndef __FREEBSD__
if (lp->d_partitions[labelpart].p_offset != 0) {
if (lp->d_partitions[0].p_offset != 0)
return (EXDEV); /* not quite right */
labelpart = 0;
}
#endif
bp = geteblk((int)lp->d_secsize);
bp->b_dev = makedev(major(dev), dkminor(dkunit(dev), labelpart));
bp->b_blkno = LABELSECTOR;