LXR linux/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
  14int 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
  60