block/partitions/karma.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  fs/partitions/karma.c
   4  *  Rio Karma partition info.
   5  *
   6  *  Copyright (C) 2006 Bob Copeland (me@bobcopeland.com)
   7  *  based on osf.c
   8  */
   9
  10 #include "check.h"
  11 #include <linux/compiler.h>
  12
  13 #define KARMA_LABEL_MAGIC               0xAB56
  14
  15 int karma_partition(struct parsed_partitions *state)
  16 {
  17         int i;
  18         int slot = 1;
  19         Sector sect;
  20         unsigned char *data;
  21         struct disklabel {
  22                 u8 d_reserved[270];
  23                 struct d_partition {
  24                         __le32 p_res;
  25                         u8 p_fstype;
  26                         u8 p_res2[3];
  27                         __le32 p_offset;
  28                         __le32 p_size;
  29                 } d_partitions[2];
  30                 u8 d_blank[208];
  31                 __le16 d_magic;
  32         } __packed *label;
  33         struct d_partition *p;
  34
  35         data = read_part_sector(state, 0, &sect);
  36         if (!data)
  37                 return -1;
  38
  39         label = (struct disklabel *)data;
  40         if (le16_to_cpu(label->d_magic) != KARMA_LABEL_MAGIC) {
  41                 put_dev_sector(sect);
  42                 return 0;
  43         }
  44
  45         p = label->d_partitions;
  46         for (i = 0 ; i < 2; i++, p++) {
  47                 if (slot == state->limit)
  48                         break;
  49
  50                 if (p->p_fstype == 0x4d && le32_to_cpu(p->p_size)) {
  51                         put_partition(state, slot, le32_to_cpu(p->p_offset),
  52                                 le32_to_cpu(p->p_size));
  53                 }
  54                 slot++;
  55         }
  56         strlcat(state->pp_buf, "\n", PAGE_SIZE);
  57         put_dev_sector(sect);
  58         return 1;
  59 }
  60