2 * volume_id - reads filesystem label and uuid
4 * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
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.
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.
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
35 #include <asm/types.h>
37 #include "volume_id.h"
42 struct mac_driver_desc {
46 } __attribute__((__packed__));
48 struct mac_partition {
56 } __attribute__((__packed__));
58 int volume_id_probe_mac_partition_map(struct volume_id *id, uint64_t off)
61 struct mac_driver_desc *driver;
62 struct mac_partition *part;
64 dbg("probing at offset 0x%llx", (unsigned long long) off);
66 buf = volume_id_get_buffer(id, off, 0x200);
70 part = (struct mac_partition *) buf;
71 if ((memcmp(part->signature, "PM", 2) == 0) &&
72 (memcmp(part->type, "Apple_partition_map", 19) == 0)) {
73 /* linux creates an own subdevice for the map
74 * just return the type if the drive header is missing */
75 volume_id_set_usage(id, VOLUME_ID_PARTITIONTABLE);
76 id->type = "mac_partition_map";
80 driver = (struct mac_driver_desc *) buf;
81 if (memcmp(driver->signature, "ER", 2) == 0) {
82 /* we are on a main device, like a CD
83 * just try to probe the first partition from the map */
84 unsigned int bsize = be16_to_cpu(driver->block_size);
88 /* get first entry of partition table */
89 buf = volume_id_get_buffer(id, off + bsize, 0x200);
93 part = (struct mac_partition *) buf;
94 if (memcmp(part->signature, "PM", 2) != 0)
97 part_count = be32_to_cpu(part->map_count);
98 dbg("expecting %d partition entries", part_count);
100 if (id->partitions != NULL)
101 free(id->partitions);
103 malloc(part_count * sizeof(struct volume_id_partition));
104 if (id->partitions == NULL)
106 memset(id->partitions, 0x00, sizeof(struct volume_id_partition));
108 id->partition_count = part_count;
110 for (i = 0; i < part_count; i++) {
114 buf = volume_id_get_buffer(id, off + ((i+1) * bsize), 0x200);
118 part = (struct mac_partition *) buf;
119 if (memcmp(part->signature, "PM", 2) != 0)
122 poff = be32_to_cpu(part->start_block) * bsize;
123 plen = be32_to_cpu(part->block_count) * bsize;
124 dbg("found '%s' partition entry at 0x%llx, len 0x%llx",
125 part->type, (unsigned long long) poff, (unsigned long long) plen);
127 id->partitions[i].off = poff;
128 id->partitions[i].len = plen;
130 if (memcmp(part->type, "Apple_Free", 10) == 0) {
131 volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_UNUSED);
132 } else if (memcmp(part->type, "Apple_partition_map", 19) == 0) {
133 volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_PARTITIONTABLE);
135 volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_UNPROBED);
138 volume_id_set_usage(id, VOLUME_ID_PARTITIONTABLE);
139 id->type = "mac_partition_map";