LXR linux/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
  12int 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
  58