LXR busybox/util-linux/volume_id/unused

   1/*
   2 * volume_id - reads filesystem label and uuid
   3 *
   4 * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
   5 *
   6 *      This library is free software; you can redistribute it and/or
   7 *      modify it under the terms of the GNU Lesser General Public
   8 *      License as published by the Free Software Foundation; either
   9 *      version 2.1 of the License, or (at your option) any later version.
  10 *
  11 *      This library is distributed in the hope that it will be useful,
  12 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14 *      Lesser General Public License for more details.
  15 *
  16 *      You should have received a copy of the GNU Lesser General Public
  17 *      License along with this library; if not, write to the Free Software
  18 *      Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19 */
  20
  21#include "volume_id_internal.h"
  22
  23struct mac_driver_desc {
  24        uint8_t         signature[2];
  25        uint16_t        block_size;
  26        uint32_t        block_count;
  27} PACKED;
  28
  29struct mac_partition {
  30        uint8_t         signature[2];
  31        uint16_t        res1;
  32        uint32_t        map_count;
  33        uint32_t        start_block;
  34        uint32_t        block_count;
  35        uint8_t         name[32];
  36        uint8_t         type[32];
  37} PACKED;
  38
  39int FAST_FUNC volume_id_probe_mac_partition_map(struct volume_id *id, uint64_t off)
  40{
  41        const uint8_t *buf;
  42        struct mac_driver_desc *driver;
  43        struct mac_partition *part;
  44
  45        dbg("probing at offset 0x%llx", (unsigned long long) off);
  46
  47        buf = volume_id_get_buffer(id, off, 0x200);
  48        if (buf == NULL)
  49                return -1;
  50
  51        part = (struct mac_partition *) buf;
  52        if (part->signature[0] == 'P' && part->signature[1] == 'M' /* "PM" */
  53         && (memcmp(part->type, "Apple_partition_map", 19) == 0)
  54        ) {
  55                /* linux creates an own subdevice for the map
  56                 * just return the type if the drive header is missing */
  57//              volume_id_set_usage(id, VOLUME_ID_PARTITIONTABLE);
  58//              id->type = "mac_partition_map";
  59                return 0;
  60        }
  61
  62        driver = (struct mac_driver_desc *) buf;
  63        if (driver->signature[0] == 'E' && driver->signature[1] == 'R') { /* "ER" */
  64                /* we are on a main device, like a CD
  65                 * just try to probe the first partition from the map */
  66                unsigned bsize = be16_to_cpu(driver->block_size);
  67                int part_count;
  68                int i;
  69
  70                /* get first entry of partition table */
  71                buf = volume_id_get_buffer(id, off +  bsize, 0x200);
  72                if (buf == NULL)
  73                        return -1;
  74
  75                part = (struct mac_partition *) buf;
  76                if (part->signature[0] != 'P' || part->signature[1] != 'M') /* not "PM" */
  77                        return -1;
  78
  79                part_count = be32_to_cpu(part->map_count);
  80                dbg("expecting %d partition entries", part_count);
  81
  82                if (id->partitions != NULL)
  83                        free(id->partitions);
  84                id->partitions = xzalloc(part_count * sizeof(struct volume_id_partition));
  85
  86                id->partition_count = part_count;
  87
  88                for (i = 0; i < part_count; i++) {
  89                        uint64_t poff;
  90                        uint64_t plen;
  91
  92                        buf = volume_id_get_buffer(id, off + ((i+1) * bsize), 0x200);
  93                        if (buf == NULL)
  94                                return -1;
  95
  96                        part = (struct mac_partition *) buf;
  97                        if (part->signature[0] != 'P' || part->signature[1] != 'M') /* not "PM" */
  98                                return -1;
  99
 100                        poff = be32_to_cpu(part->start_block) * bsize;
 101                        plen = be32_to_cpu(part->block_count) * bsize;
 102                        dbg("found '%s' partition entry at 0x%llx, len 0x%llx",
 103                                        part->type, (unsigned long long) poff,
 104                                        (unsigned long long) plen);
 105
 106//                      id->partitions[i].pt_off = poff;
 107//                      id->partitions[i].pt_len = plen;
 108
 109//                      if (memcmp(part->type, "Apple_Free", 10) == 0) {
 110//                              volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_UNUSED);
 111//                      } else if (memcmp(part->type, "Apple_partition_map", 19) == 0) {
 112//                              volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_PARTITIONTABLE);
 113//                      } else {
 114//                              volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_UNPROBED);
 115//                      }
 116                }
 117//              volume_id_set_usage(id, VOLUME_ID_PARTITIONTABLE);
 118//              id->type = "mac_partition_map";
 119                return 0;
 120        }
 121
 122        return -1;
 123}
 124