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//kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_MAC) += mac.o
  22
  23//config:
  24//config:### config FEATURE_VOLUMEID_MAC
  25//config:###    bool "mac filesystem"
  26//config:###    default y
  27//config:###    depends on VOLUMEID
  28//config:###    help
  29//config:###      TODO
  30//config:
  31
  32#include "volume_id_internal.h"
  33
  34struct mac_driver_desc {
  35        uint8_t         signature[2];
  36        uint16_t        block_size;
  37        uint32_t        block_count;
  38} PACKED;
  39
  40struct mac_partition {
  41        uint8_t         signature[2];
  42        uint16_t        res1;
  43        uint32_t        map_count;
  44        uint32_t        start_block;
  45        uint32_t        block_count;
  46        uint8_t         name[32];
  47        uint8_t         type[32];
  48} PACKED;
  49
  50int FAST_FUNC volume_id_probe_mac_partition_map(struct volume_id *id, uint64_t off)
  51{
  52        const uint8_t *buf;
  53        struct mac_driver_desc *driver;
  54        struct mac_partition *part;
  55
  56        dbg("probing at offset 0x%llx", (unsigned long long) off);
  57
  58        buf = volume_id_get_buffer(id, off, 0x200);
  59        if (buf == NULL)
  60                return -1;
  61
  62        part = (struct mac_partition *) buf;
  63        if (part->signature[0] == 'P' && part->signature[1] == 'M' /* "PM" */
  64         && (memcmp(part->type, "Apple_partition_map", 19) == 0)
  65        ) {
  66                /* linux creates an own subdevice for the map
  67                 * just return the type if the drive header is missing */
  68//              volume_id_set_usage(id, VOLUME_ID_PARTITIONTABLE);
  69//              id->type = "mac_partition_map";
  70                return 0;
  71        }
  72
  73        driver = (struct mac_driver_desc *) buf;
  74        if (driver->signature[0] == 'E' && driver->signature[1] == 'R') { /* "ER" */
  75                /* we are on a main device, like a CD
  76                 * just try to probe the first partition from the map */
  77                unsigned bsize = be16_to_cpu(driver->block_size);
  78                int part_count;
  79                int i;
  80
  81                /* get first entry of partition table */
  82                buf = volume_id_get_buffer(id, off +  bsize, 0x200);
  83                if (buf == NULL)
  84                        return -1;
  85
  86                part = (struct mac_partition *) buf;
  87                if (part->signature[0] != 'P' || part->signature[1] != 'M') /* not "PM" */
  88                        return -1;
  89
  90                part_count = be32_to_cpu(part->map_count);
  91                dbg("expecting %d partition entries", part_count);
  92
  93                if (id->partitions != NULL)
  94                        free(id->partitions);
  95                id->partitions = xzalloc(part_count * sizeof(struct volume_id_partition));
  96
  97                id->partition_count = part_count;
  98
  99                for (i = 0; i < part_count; i++) {
 100                        uint64_t poff;
 101                        uint64_t plen;
 102
 103                        buf = volume_id_get_buffer(id, off + ((i+1) * bsize), 0x200);
 104                        if (buf == NULL)
 105                                return -1;
 106
 107                        part = (struct mac_partition *) buf;
 108                        if (part->signature[0] != 'P' || part->signature[1] != 'M') /* not "PM" */
 109                                return -1;
 110
 111                        poff = be32_to_cpu(part->start_block) * bsize;
 112                        plen = be32_to_cpu(part->block_count) * bsize;
 113                        dbg("found '%s' partition entry at 0x%llx, len 0x%llx",
 114                                        part->type, (unsigned long long) poff,
 115                                        (unsigned long long) plen);
 116
 117//                      id->partitions[i].pt_off = poff;
 118//                      id->partitions[i].pt_len = plen;
 119
 120//                      if (memcmp(part->type, "Apple_Free", 10) == 0) {
 121//                              volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_UNUSED);
 122//                      } else if (memcmp(part->type, "Apple_partition_map", 19) == 0) {
 123//                              volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_PARTITIONTABLE);
 124//                      } else {
 125//                              volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_UNPROBED);
 126//                      }
 127                }
 128//              volume_id_set_usage(id, VOLUME_ID_PARTITIONTABLE);
 129//              id->type = "mac_partition_map";
 130                return 0;
 131        }
 132
 133        return -1;
 134}
 135