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/*
* volume_id - reads filesystem label and uuid
*
* Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
//config:### config FEATURE_VOLUMEID_MAC
//config:### bool "mac filesystem"
//config:### default y
//config:### depends on VOLUMEID
//kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_MAC) += mac.o
#include "volume_id_internal.h"
struct mac_driver_desc {
uint8_t signature[2];
uint16_t block_size;
uint32_t block_count;
} PACKED;
struct mac_partition {
uint8_t signature[2];
uint16_t res1;
uint32_t map_count;
uint32_t start_block;
uint32_t block_count;
uint8_t name[32];
uint8_t type[32];
} PACKED;
int FAST_FUNC volume_id_probe_mac_partition_map(struct volume_id *id, uint64_t off)
{
const uint8_t *buf;
struct mac_driver_desc *driver;
struct mac_partition *part;
dbg("probing at offset 0x%llx", (unsigned long long) off);
buf = volume_id_get_buffer(id, off, 0x200);
if (buf == NULL)
return -1;
part = (struct mac_partition *) buf;
if (part->signature[0] == 'P' && part->signature[1] == 'M' /* "PM" */
&& (memcmp(part->type, "Apple_partition_map", 19) == 0)
) {
/* linux creates an own subdevice for the map
* just return the type if the drive header is missing */
// volume_id_set_usage(id, VOLUME_ID_PARTITIONTABLE);
// id->type = "mac_partition_map";
return 0;
}
driver = (struct mac_driver_desc *) buf;
if (driver->signature[0] == 'E' && driver->signature[1] == 'R') { /* "ER" */
/* we are on a main device, like a CD
* just try to probe the first partition from the map */
unsigned bsize = be16_to_cpu(driver->block_size);
int part_count;
int i;
/* get first entry of partition table */
buf = volume_id_get_buffer(id, off + bsize, 0x200);
if (buf == NULL)
return -1;
part = (struct mac_partition *) buf;
if (part->signature[0] != 'P' || part->signature[1] != 'M') /* not "PM" */
return -1;
part_count = be32_to_cpu(part->map_count);
dbg("expecting %d partition entries", part_count);
if (id->partitions != NULL)
free(id->partitions);
id->partitions = xzalloc(part_count * sizeof(struct volume_id_partition));
id->partition_count = part_count;
for (i = 0; i < part_count; i++) {
uint64_t poff;
uint64_t plen;
buf = volume_id_get_buffer(id, off + ((i+1) * bsize), 0x200);
if (buf == NULL)
return -1;
part = (struct mac_partition *) buf;
if (part->signature[0] != 'P' || part->signature[1] != 'M') /* not "PM" */
return -1;
poff = be32_to_cpu(part->start_block) * bsize;
plen = be32_to_cpu(part->block_count) * bsize;
dbg("found '%s' partition entry at 0x%llx, len 0x%llx",
part->type, (unsigned long long) poff,
(unsigned long long) plen);
// id->partitions[i].pt_off = poff;
// id->partitions[i].pt_len = plen;
// if (memcmp(part->type, "Apple_Free", 10) == 0) {
// volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_UNUSED);
// } else if (memcmp(part->type, "Apple_partition_map", 19) == 0) {
// volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_PARTITIONTABLE);
// } else {
// volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_UNPROBED);
// }
}
// volume_id_set_usage(id, VOLUME_ID_PARTITIONTABLE);
// id->type = "mac_partition_map";
return 0;
}
return -1;
}
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