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"
38 #include "../logging.h"
42 int volume_id_probe_mac_partition_map(struct volume_id *id, __u64 off)
44 struct mac_driver_desc {
48 } __attribute__((__packed__)) *driver;
50 struct mac_partition {
58 } __attribute__((__packed__)) *part;
62 buf = volume_id_get_buffer(id, off, 0x200);
66 part = (struct mac_partition *) buf;
67 if ((strncmp(part->signature, "PM", 2) == 0) &&
68 (strncmp(part->type, "Apple_partition_map", 19) == 0)) {
69 /* linux creates an own subdevice for the map
70 * just return the type if the drive header is missing */
71 volume_id_set_usage(id, VOLUME_ID_PARTITIONTABLE);
72 id->type = "mac_partition_map";
76 driver = (struct mac_driver_desc *) buf;
77 if (strncmp(driver->signature, "ER", 2) == 0) {
78 /* we are on a main device, like a CD
79 * just try to probe the first partition from the map */
80 unsigned int bsize = be16_to_cpu(driver->block_size);
84 /* get first entry of partition table */
85 buf = volume_id_get_buffer(id, off + bsize, 0x200);
89 part = (struct mac_partition *) buf;
90 if (strncmp(part->signature, "PM", 2) != 0)
93 part_count = be32_to_cpu(part->map_count);
94 dbg("expecting %d partition entries", part_count);
96 if (id->partitions != NULL)
99 malloc(part_count * sizeof(struct volume_id_partition));
100 if (id->partitions == NULL)
102 memset(id->partitions, 0x00, sizeof(struct volume_id_partition));
104 id->partition_count = part_count;
106 for (i = 0; i < part_count; i++) {
110 buf = volume_id_get_buffer(id, off + ((i+1) * bsize), 0x200);
114 part = (struct mac_partition *) buf;
115 if (strncmp(part->signature, "PM", 2) != 0)
118 poff = be32_to_cpu(part->start_block) * bsize;
119 plen = be32_to_cpu(part->block_count) * bsize;
120 dbg("found '%s' partition entry at 0x%llx, len 0x%llx",
121 part->type, poff, plen);
123 id->partitions[i].off = poff;
124 id->partitions[i].len = plen;
126 if (strncmp(part->type, "Apple_Free", 10) == 0) {
127 volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_UNUSED);
128 } else if (strncmp(part->type, "Apple_partition_map", 19) == 0) {
129 volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_PARTITIONTABLE);
131 volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_UNPROBED);
134 volume_id_set_usage(id, VOLUME_ID_PARTITIONTABLE);
135 id->type = "mac_partition_map";