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
20 //config:### config FEATURE_VOLUMEID_MAC
21 //config:### bool "mac filesystem"
22 //config:### default y
23 //config:### depends on VOLUMEID
25 //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_MAC) += mac.o
27 #include "volume_id_internal.h"
29 struct mac_driver_desc {
35 struct mac_partition {
45 int FAST_FUNC volume_id_probe_mac_partition_map(struct volume_id *id, uint64_t off)
48 struct mac_driver_desc *driver;
49 struct mac_partition *part;
51 dbg("probing at offset 0x%llx", (unsigned long long) off);
53 buf = volume_id_get_buffer(id, off, 0x200);
57 part = (struct mac_partition *) buf;
58 if (part->signature[0] == 'P' && part->signature[1] == 'M' /* "PM" */
59 && (memcmp(part->type, "Apple_partition_map", 19) == 0)
61 /* linux creates an own subdevice for the map
62 * just return the type if the drive header is missing */
63 // volume_id_set_usage(id, VOLUME_ID_PARTITIONTABLE);
64 // id->type = "mac_partition_map";
68 driver = (struct mac_driver_desc *) buf;
69 if (driver->signature[0] == 'E' && driver->signature[1] == 'R') { /* "ER" */
70 /* we are on a main device, like a CD
71 * just try to probe the first partition from the map */
72 unsigned bsize = be16_to_cpu(driver->block_size);
76 /* get first entry of partition table */
77 buf = volume_id_get_buffer(id, off + bsize, 0x200);
81 part = (struct mac_partition *) buf;
82 if (part->signature[0] != 'P' || part->signature[1] != 'M') /* not "PM" */
85 part_count = be32_to_cpu(part->map_count);
86 dbg("expecting %d partition entries", part_count);
88 if (id->partitions != NULL)
90 id->partitions = xzalloc(part_count * sizeof(struct volume_id_partition));
92 id->partition_count = part_count;
94 for (i = 0; i < part_count; i++) {
98 buf = volume_id_get_buffer(id, off + ((i+1) * bsize), 0x200);
102 part = (struct mac_partition *) buf;
103 if (part->signature[0] != 'P' || part->signature[1] != 'M') /* not "PM" */
106 poff = be32_to_cpu(part->start_block) * bsize;
107 plen = be32_to_cpu(part->block_count) * bsize;
108 dbg("found '%s' partition entry at 0x%llx, len 0x%llx",
109 part->type, (unsigned long long) poff,
110 (unsigned long long) plen);
112 // id->partitions[i].pt_off = poff;
113 // id->partitions[i].pt_len = plen;
115 // if (memcmp(part->type, "Apple_Free", 10) == 0) {
116 // volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_UNUSED);
117 // } else if (memcmp(part->type, "Apple_partition_map", 19) == 0) {
118 // volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_PARTITIONTABLE);
120 // volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_UNPROBED);
123 // volume_id_set_usage(id, VOLUME_ID_PARTITIONTABLE);
124 // id->type = "mac_partition_map";