/* * 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 */ #include "volume_id_internal.h" struct mac_driver_desc { uint8_t signature[2]; uint16_t block_size; uint32_t block_count; } __attribute__((__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]; } __attribute__((__packed__)); int 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; }