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/*
* fs/partitions/osf.c
*
* Code extracted from drivers/block/genhd.c
*
* Copyright (C) 1991-1998 Linus Torvalds
* Re-organised Feb 1998 Russell King
*/
#include <linux/fs.h>
#include <linux/genhd.h>
#include <linux/kernel.h>
#include <linux/major.h>
#include <linux/string.h>
#include <linux/blk.h>
#include "check.h"
#include "osf.h"
int osf_partition(struct gendisk *hd, kdev_t dev, unsigned long first_sector,
int current_minor)
{
int i;
int mask = (1 << hd->minor_shift) - 1;
struct buffer_head *bh;
struct disklabel {
u32 d_magic;
u16 d_type,d_subtype;
u8 d_typename[16];
u8 d_packname[16];
u32 d_secsize;
u32 d_nsectors;
u32 d_ntracks;
u32 d_ncylinders;
u32 d_secpercyl;
u32 d_secprtunit;
u16 d_sparespertrack;
u16 d_sparespercyl;
u32 d_acylinders;
u16 d_rpm, d_interleave, d_trackskew, d_cylskew;
u32 d_headswitch, d_trkseek, d_flags;
u32 d_drivedata[5];
u32 d_spare[5];
u32 d_magic2;
u16 d_checksum;
u16 d_npartitions;
u32 d_bbsize, d_sbsize;
struct d_partition {
u32 p_size;
u32 p_offset;
u32 p_fsize;
u8 p_fstype;
u8 p_frag;
u16 p_cpg;
} d_partitions[8];
} * label;
struct d_partition * partition;
if (!(bh = bread(dev,0,get_ptable_blocksize(dev)))) {
if (warn_no_part) printk("unable to read partition table\n");
return -1;
}
label = (struct disklabel *) (bh->b_data+64);
partition = label->d_partitions;
if (label->d_magic != DISKLABELMAGIC) {
brelse(bh);
return 0;
}
if (label->d_magic2 != DISKLABELMAGIC) {
brelse(bh);
return 0;
}
for (i = 0 ; i < label->d_npartitions; i++, partition++) {
if ((current_minor & mask) == 0)
break;
if (partition->p_size)
add_gd_partition(hd, current_minor,
first_sector+partition->p_offset,
partition->p_size);
current_minor++;
}
printk("\n");
brelse(bh);
return 1;
}
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