[3320] | 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 |
|
---|
| 23 | struct mac_driver_desc {
|
---|
| 24 | uint8_t signature[2];
|
---|
| 25 | uint16_t block_size;
|
---|
| 26 | uint32_t block_count;
|
---|
| 27 | } PACKED;
|
---|
| 28 |
|
---|
| 29 | struct 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 |
|
---|
| 39 | int 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 | }
|
---|