block/partitions/karma.c

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