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 "karma.h"
  12 #include <linux/compiler.h>
  13
  14 int karma_partition(struct parsed_partitions *state)
  15 {
  16         int i;
  17         int slot = 1;
  18         Sector sect;
  19         unsigned char *data;
  20         struct disklabel {
  21                 u8 d_reserved[270];
  22                 struct d_partition {
  23                         __le32 p_res;
  24                         u8 p_fstype;
  25                         u8 p_res2[3];
  26                         __le32 p_offset;
  27                         __le32 p_size;
  28                 } d_partitions[2];
  29                 u8 d_blank[208];
  30                 __le16 d_magic;
  31         } __packed *label;
  32         struct d_partition *p;
  33
  34         data = read_part_sector(state, 0, &sect);
  35         if (!data)
  36                 return -1;
  37
  38         label = (struct disklabel *)data;
  39         if (le16_to_cpu(label->d_magic) != KARMA_LABEL_MAGIC) {
  40                 put_dev_sector(sect);
  41                 return 0;
  42         }
  43
  44         p = label->d_partitions;
  45         for (i = 0 ; i < 2; i++, p++) {
  46                 if (slot == state->limit)
  47                         break;
  48
  49                 if (p->p_fstype == 0x4d && le32_to_cpu(p->p_size)) {
  50                         put_partition(state, slot, le32_to_cpu(p->p_offset),
  51                                 le32_to_cpu(p->p_size));
  52                 }
  53                 slot++;
  54         }
  55         strlcat(state->pp_buf, "\n", PAGE_SIZE);
  56         put_dev_sector(sect);
  57         return 1;
  58 }
  59