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