[2725] | 1 | /*
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| 2 | * volume_id - reads filesystem label and uuid
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| 3 | *
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| 4 | * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
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| 5 | *
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| 6 | * This library is free software; you can redistribute it and/or
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| 7 | * modify it under the terms of the GNU Lesser General Public
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| 8 | * License as published by the Free Software Foundation; either
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| 9 | * version 2.1 of the License, or (at your option) any later version.
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| 10 | *
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| 11 | * This library is distributed in the hope that it will be useful,
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 14 | * Lesser General Public License for more details.
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| 15 | *
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| 16 | * You should have received a copy of the GNU Lesser General Public
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| 17 | * License along with this library; if not, write to the Free Software
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| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 19 | */
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| 20 |
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[3621] | 21 | //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_MAC) += mac.o
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| 22 |
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| 23 | //config:
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| 24 | //config:### config FEATURE_VOLUMEID_MAC
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| 25 | //config:### bool "mac filesystem"
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| 26 | //config:### default y
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| 27 | //config:### depends on VOLUMEID
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| 28 | //config:### help
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| 29 | //config:### TODO
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| 30 | //config:
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| 31 |
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[2725] | 32 | #include "volume_id_internal.h"
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| 33 |
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| 34 | struct mac_driver_desc {
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| 35 | uint8_t signature[2];
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| 36 | uint16_t block_size;
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| 37 | uint32_t block_count;
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| 38 | } PACKED;
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| 39 |
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| 40 | struct mac_partition {
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| 41 | uint8_t signature[2];
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| 42 | uint16_t res1;
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| 43 | uint32_t map_count;
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| 44 | uint32_t start_block;
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| 45 | uint32_t block_count;
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| 46 | uint8_t name[32];
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| 47 | uint8_t type[32];
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| 48 | } PACKED;
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| 49 |
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| 50 | int FAST_FUNC volume_id_probe_mac_partition_map(struct volume_id *id, uint64_t off)
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| 51 | {
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| 52 | const uint8_t *buf;
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| 53 | struct mac_driver_desc *driver;
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| 54 | struct mac_partition *part;
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| 55 |
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| 56 | dbg("probing at offset 0x%llx", (unsigned long long) off);
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| 57 |
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| 58 | buf = volume_id_get_buffer(id, off, 0x200);
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| 59 | if (buf == NULL)
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| 60 | return -1;
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| 61 |
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| 62 | part = (struct mac_partition *) buf;
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| 63 | if (part->signature[0] == 'P' && part->signature[1] == 'M' /* "PM" */
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| 64 | && (memcmp(part->type, "Apple_partition_map", 19) == 0)
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| 65 | ) {
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| 66 | /* linux creates an own subdevice for the map
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| 67 | * just return the type if the drive header is missing */
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| 68 | // volume_id_set_usage(id, VOLUME_ID_PARTITIONTABLE);
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| 69 | // id->type = "mac_partition_map";
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| 70 | return 0;
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| 71 | }
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| 72 |
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| 73 | driver = (struct mac_driver_desc *) buf;
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| 74 | if (driver->signature[0] == 'E' && driver->signature[1] == 'R') { /* "ER" */
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| 75 | /* we are on a main device, like a CD
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| 76 | * just try to probe the first partition from the map */
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| 77 | unsigned bsize = be16_to_cpu(driver->block_size);
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| 78 | int part_count;
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| 79 | int i;
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| 80 |
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| 81 | /* get first entry of partition table */
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| 82 | buf = volume_id_get_buffer(id, off + bsize, 0x200);
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| 83 | if (buf == NULL)
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| 84 | return -1;
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| 85 |
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| 86 | part = (struct mac_partition *) buf;
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| 87 | if (part->signature[0] != 'P' || part->signature[1] != 'M') /* not "PM" */
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| 88 | return -1;
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| 89 |
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| 90 | part_count = be32_to_cpu(part->map_count);
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| 91 | dbg("expecting %d partition entries", part_count);
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| 92 |
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| 93 | if (id->partitions != NULL)
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| 94 | free(id->partitions);
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| 95 | id->partitions = xzalloc(part_count * sizeof(struct volume_id_partition));
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| 96 |
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| 97 | id->partition_count = part_count;
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| 98 |
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| 99 | for (i = 0; i < part_count; i++) {
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| 100 | uint64_t poff;
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| 101 | uint64_t plen;
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| 102 |
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| 103 | buf = volume_id_get_buffer(id, off + ((i+1) * bsize), 0x200);
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| 104 | if (buf == NULL)
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| 105 | return -1;
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| 106 |
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| 107 | part = (struct mac_partition *) buf;
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| 108 | if (part->signature[0] != 'P' || part->signature[1] != 'M') /* not "PM" */
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| 109 | return -1;
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| 110 |
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| 111 | poff = be32_to_cpu(part->start_block) * bsize;
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| 112 | plen = be32_to_cpu(part->block_count) * bsize;
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| 113 | dbg("found '%s' partition entry at 0x%llx, len 0x%llx",
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| 114 | part->type, (unsigned long long) poff,
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| 115 | (unsigned long long) plen);
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| 116 |
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| 117 | // id->partitions[i].pt_off = poff;
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| 118 | // id->partitions[i].pt_len = plen;
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| 119 |
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| 120 | // if (memcmp(part->type, "Apple_Free", 10) == 0) {
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| 121 | // volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_UNUSED);
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| 122 | // } else if (memcmp(part->type, "Apple_partition_map", 19) == 0) {
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| 123 | // volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_PARTITIONTABLE);
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| 124 | // } else {
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| 125 | // volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_UNPROBED);
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| 126 | // }
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| 127 | }
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| 128 | // volume_id_set_usage(id, VOLUME_ID_PARTITIONTABLE);
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| 129 | // id->type = "mac_partition_map";
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| 130 | return 0;
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| 131 | }
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| 132 |
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| 133 | return -1;
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| 134 | }
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