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/*
* fs/partitions/ultrix.c
*
* Code extracted from drivers/block/genhd.c
*
* Re-organised Jul 1999 Russell King
*/
#include <linux/fs.h>
#include <linux/genhd.h>
#include <linux/kernel.h>
#include <linux/major.h>
#include <linux/blk.h>
#include "check.h"
int ultrix_partition(struct gendisk *hd, struct block_device *bdev,
unsigned long first_sector, int first_part_minor)
{
int i;
Sector sect;
unsigned char *data;
struct ultrix_disklabel {
s32 pt_magic; /* magic no. indicating part. info exits */
s32 pt_valid; /* set by driver if pt is current */
struct pt_info {
s32 pi_nblocks; /* no. of sectors */
u32 pi_blkoff; /* block offset for start */
} pt_part[8];
} *label;
#define PT_MAGIC 0x032957 /* Partition magic number */
#define PT_VALID 1 /* Indicates if struct is valid */
data = read_dev_sector(bdev, (16384 - sizeof(*label))/512, §);
if (!data)
return -1;
label = (struct ultrix_disklabel *)(data + 512 - sizeof(*label));
if (label->pt_magic == PT_MAGIC && label->pt_valid == PT_VALID) {
for (i=0; i<8; i++, first_part_minor++)
if (label->pt_part[i].pi_nblocks)
add_gd_partition(hd, first_part_minor,
label->pt_part[i].pi_blkoff,
label->pt_part[i].pi_nblocks);
put_dev_sector(sect);
printk ("\n");
return 1;
} else {
put_dev_sector(sect);
return 0;
}
}
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