/*
   *  fs/partitions/sysv68.c
   *
   *  Copyright (C) 2007 Philippe De Muyter <phdm@macqel.be>
   */
  
  #include "check.h"
  #include "sysv68.h"
  
  /*
   *	Volume ID structure: on first 256-bytes sector of disk
   */
  
  struct volumeid {
  	u8	vid_unused[248];
  	u8	vid_mac[8];	/* ASCII string "MOTOROLA" */
  };
  
  /*
   *	config block: second 256-bytes sector on disk
   */
  
  struct dkconfig {
  	u8	ios_unused0[128];
  	__be32	ios_slcblk;	/* Slice table block number */
  	__be16	ios_slccnt;	/* Number of entries in slice table */
  	u8	ios_unused1[122];
  };
  
  /*
   *	combined volumeid and dkconfig block
   */
  
  struct dkblk0 {
  	struct volumeid dk_vid;
  	struct dkconfig dk_ios;
  };
  
  /*
   *	Slice Table Structure
   */
  
  struct slice {
  	__be32	nblocks;		/* slice size (in blocks) */
  	__be32	blkoff;			/* block offset of slice */
  };

  int sysv68_partition(struct parsed_partitions *state)

  {
  	int i, slices;
  	int slot = 1;
  	Sector sect;
  	unsigned char *data;
  	struct dkblk0 *b;
  	struct slice *slice;

  	char tmp[64];

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

  	if (!data)
  		return -1;
  
  	b = (struct dkblk0 *)data;
  	if (memcmp(b->dk_vid.vid_mac, "MOTOROLA", sizeof(b->dk_vid.vid_mac))) {
  		put_dev_sector(sect);
  		return 0;
  	}
  	slices = be16_to_cpu(b->dk_ios.ios_slccnt);
  	i = be32_to_cpu(b->dk_ios.ios_slcblk);
  	put_dev_sector(sect);

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

  	if (!data)
  		return -1;
  
  	slices -= 1; /* last slice is the whole disk */

  	snprintf(tmp, sizeof(tmp), "sysV68: %s(s%u)", state->name, slices);
  	strlcat(state->pp_buf, tmp, PAGE_SIZE);

  	slice = (struct slice *)data;
  	for (i = 0; i < slices; i++, slice++) {
  		if (slot == state->limit)
  			break;
  		if (be32_to_cpu(slice->nblocks)) {
  			put_partition(state, slot,
  				be32_to_cpu(slice->blkoff),
  				be32_to_cpu(slice->nblocks));

  			snprintf(tmp, sizeof(tmp), "(s%u)", i);
  			strlcat(state->pp_buf, tmp, PAGE_SIZE);

  		}
  		slot++;
  	}

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

  	put_dev_sector(sect);
  	return 1;
  }