/*
   *  fs/partitions/osf.c
   *
   *  Code extracted from drivers/block/genhd.c
   *
   *  Copyright (C) 1991-1998  Linus Torvalds
   *  Re-organised Feb 1998 Russell King
   */
  
  #include "check.h"
  #include "osf.h"

  #define MAX_OSF_PARTITIONS 18

  int osf_partition(struct parsed_partitions *state)

  {
  	int i;
  	int slot = 1;

  	unsigned int npartitions;

  	Sector sect;
  	unsigned char *data;
  	struct disklabel {
  		__le32 d_magic;
  		__le16 d_type,d_subtype;
  		u8 d_typename[16];
  		u8 d_packname[16];
  		__le32 d_secsize;
  		__le32 d_nsectors;
  		__le32 d_ntracks;
  		__le32 d_ncylinders;
  		__le32 d_secpercyl;
  		__le32 d_secprtunit;
  		__le16 d_sparespertrack;
  		__le16 d_sparespercyl;
  		__le32 d_acylinders;
  		__le16 d_rpm, d_interleave, d_trackskew, d_cylskew;
  		__le32 d_headswitch, d_trkseek, d_flags;
  		__le32 d_drivedata[5];
  		__le32 d_spare[5];
  		__le32 d_magic2;
  		__le16 d_checksum;
  		__le16 d_npartitions;
  		__le32 d_bbsize, d_sbsize;
  		struct d_partition {
  			__le32 p_size;
  			__le32 p_offset;
  			__le32 p_fsize;
  			u8  p_fstype;
  			u8  p_frag;
  			__le16 p_cpg;

  		} d_partitions[MAX_OSF_PARTITIONS];

  	} * label;
  	struct d_partition * partition;

  	data = read_part_sector(state, 0, &sect);

  	if (!data)
  		return -1;
  
  	label = (struct disklabel *) (data+64);
  	partition = label->d_partitions;
  	if (le32_to_cpu(label->d_magic) != DISKLABELMAGIC) {
  		put_dev_sector(sect);
  		return 0;
  	}
  	if (le32_to_cpu(label->d_magic2) != DISKLABELMAGIC) {
  		put_dev_sector(sect);
  		return 0;
  	}

  	npartitions = le16_to_cpu(label->d_npartitions);
  	if (npartitions > MAX_OSF_PARTITIONS) {
  		put_dev_sector(sect);
  		return 0;
  	}
  	for (i = 0 ; i < npartitions; i++, partition++) {

  		if (slot == state->limit)
  		        break;
  		if (le32_to_cpu(partition->p_size))
  			put_partition(state, slot,
  				le32_to_cpu(partition->p_offset),
  				le32_to_cpu(partition->p_size));
  		slot++;
  	}

  	strlcat(state->pp_buf, "
  ", PAGE_SIZE);

  	put_dev_sector(sect);
  	return 1;
  }