// SPDX-License-Identifier: GPL-2.0

  /*
   *  fs/partitions/ultrix.c
   *
   *  Code extracted from drivers/block/genhd.c
   *
   *  Re-organised Jul 1999 Russell King
   */
  
  #include "check.h"

  int ultrix_partition(struct parsed_partitions *state)

  {
  	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_part_sector(state, (16384 - sizeof(*label))/512, &sect);

  	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++)
  			if (label->pt_part[i].pi_nblocks)
  				put_partition(state, i+1, 
  					      label->pt_part[i].pi_blkoff,
  					      label->pt_part[i].pi_nblocks);
  		put_dev_sector(sect);

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

  		return 1;
  	} else {
  		put_dev_sector(sect);
  		return 0;
  	}
  }