[2725] | 1 | /*
|
---|
| 2 | * volume_id - reads filesystem label and uuid
|
---|
| 3 | *
|
---|
| 4 | * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
|
---|
| 5 | *
|
---|
| 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.
|
---|
| 10 | *
|
---|
| 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.
|
---|
| 15 | *
|
---|
| 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
|
---|
| 19 | */
|
---|
| 20 |
|
---|
| 21 | #include "volume_id_internal.h"
|
---|
| 22 |
|
---|
| 23 | struct hfs_finder_info{
|
---|
| 24 | uint32_t boot_folder;
|
---|
| 25 | uint32_t start_app;
|
---|
| 26 | uint32_t open_folder;
|
---|
| 27 | uint32_t os9_folder;
|
---|
| 28 | uint32_t reserved;
|
---|
| 29 | uint32_t osx_folder;
|
---|
| 30 | uint8_t id[8];
|
---|
| 31 | } PACKED;
|
---|
| 32 |
|
---|
| 33 | struct hfs_mdb {
|
---|
| 34 | uint8_t signature[2];
|
---|
| 35 | uint32_t cr_date;
|
---|
| 36 | uint32_t ls_Mod;
|
---|
| 37 | uint16_t atrb;
|
---|
| 38 | uint16_t nm_fls;
|
---|
| 39 | uint16_t vbm_st;
|
---|
| 40 | uint16_t alloc_ptr;
|
---|
| 41 | uint16_t nm_al_blks;
|
---|
| 42 | uint32_t al_blk_size;
|
---|
| 43 | uint32_t clp_size;
|
---|
| 44 | uint16_t al_bl_st;
|
---|
| 45 | uint32_t nxt_cnid;
|
---|
| 46 | uint16_t free_bks;
|
---|
| 47 | uint8_t label_len;
|
---|
| 48 | uint8_t label[27];
|
---|
| 49 | uint32_t vol_bkup;
|
---|
| 50 | uint16_t vol_seq_num;
|
---|
| 51 | uint32_t wr_cnt;
|
---|
| 52 | uint32_t xt_clump_size;
|
---|
| 53 | uint32_t ct_clump_size;
|
---|
| 54 | uint16_t num_root_dirs;
|
---|
| 55 | uint32_t file_count;
|
---|
| 56 | uint32_t dir_count;
|
---|
| 57 | struct hfs_finder_info finder_info;
|
---|
| 58 | uint8_t embed_sig[2];
|
---|
| 59 | uint16_t embed_startblock;
|
---|
| 60 | uint16_t embed_blockcount;
|
---|
| 61 | } PACKED;
|
---|
| 62 |
|
---|
| 63 | struct hfsplus_bnode_descriptor {
|
---|
| 64 | uint32_t next;
|
---|
| 65 | uint32_t prev;
|
---|
| 66 | uint8_t type;
|
---|
| 67 | uint8_t height;
|
---|
| 68 | uint16_t num_recs;
|
---|
| 69 | uint16_t reserved;
|
---|
| 70 | } PACKED;
|
---|
| 71 |
|
---|
| 72 | struct hfsplus_bheader_record {
|
---|
| 73 | uint16_t depth;
|
---|
| 74 | uint32_t root;
|
---|
| 75 | uint32_t leaf_count;
|
---|
| 76 | uint32_t leaf_head;
|
---|
| 77 | uint32_t leaf_tail;
|
---|
| 78 | uint16_t node_size;
|
---|
| 79 | } PACKED;
|
---|
| 80 |
|
---|
| 81 | struct hfsplus_catalog_key {
|
---|
| 82 | uint16_t key_len;
|
---|
| 83 | uint32_t parent_id;
|
---|
| 84 | uint16_t unicode_len;
|
---|
| 85 | uint8_t unicode[255 * 2];
|
---|
| 86 | } PACKED;
|
---|
| 87 |
|
---|
| 88 | struct hfsplus_extent {
|
---|
| 89 | uint32_t start_block;
|
---|
| 90 | uint32_t block_count;
|
---|
| 91 | } PACKED;
|
---|
| 92 |
|
---|
| 93 | #define HFSPLUS_EXTENT_COUNT 8
|
---|
| 94 | struct hfsplus_fork {
|
---|
| 95 | uint64_t total_size;
|
---|
| 96 | uint32_t clump_size;
|
---|
| 97 | uint32_t total_blocks;
|
---|
| 98 | struct hfsplus_extent extents[HFSPLUS_EXTENT_COUNT];
|
---|
| 99 | } PACKED;
|
---|
| 100 |
|
---|
| 101 | struct hfsplus_vol_header {
|
---|
| 102 | uint8_t signature[2];
|
---|
| 103 | uint16_t version;
|
---|
| 104 | uint32_t attributes;
|
---|
| 105 | uint32_t last_mount_vers;
|
---|
| 106 | uint32_t reserved;
|
---|
| 107 | uint32_t create_date;
|
---|
| 108 | uint32_t modify_date;
|
---|
| 109 | uint32_t backup_date;
|
---|
| 110 | uint32_t checked_date;
|
---|
| 111 | uint32_t file_count;
|
---|
| 112 | uint32_t folder_count;
|
---|
| 113 | uint32_t blocksize;
|
---|
| 114 | uint32_t total_blocks;
|
---|
| 115 | uint32_t free_blocks;
|
---|
| 116 | uint32_t next_alloc;
|
---|
| 117 | uint32_t rsrc_clump_sz;
|
---|
| 118 | uint32_t data_clump_sz;
|
---|
| 119 | uint32_t next_cnid;
|
---|
| 120 | uint32_t write_count;
|
---|
| 121 | uint64_t encodings_bmp;
|
---|
| 122 | struct hfs_finder_info finder_info;
|
---|
| 123 | struct hfsplus_fork alloc_file;
|
---|
| 124 | struct hfsplus_fork ext_file;
|
---|
| 125 | struct hfsplus_fork cat_file;
|
---|
| 126 | struct hfsplus_fork attr_file;
|
---|
| 127 | struct hfsplus_fork start_file;
|
---|
| 128 | } PACKED;
|
---|
| 129 |
|
---|
| 130 | #define HFS_SUPERBLOCK_OFFSET 0x400
|
---|
| 131 | #define HFS_NODE_LEAF 0xff
|
---|
| 132 | #define HFSPLUS_POR_CNID 1
|
---|
| 133 |
|
---|
[3232] | 134 | static void FAST_FUNC hfs_set_uuid(struct volume_id *id, const uint8_t *hfs_id)
|
---|
| 135 | {
|
---|
| 136 | #define hfs_id_len 8
|
---|
| 137 | md5_ctx_t md5c;
|
---|
| 138 | uint8_t uuid[16];
|
---|
| 139 | unsigned i;
|
---|
| 140 |
|
---|
| 141 | for (i = 0; i < hfs_id_len; i++)
|
---|
| 142 | if (hfs_id[i] != 0)
|
---|
| 143 | goto do_md5;
|
---|
| 144 | return;
|
---|
| 145 | do_md5:
|
---|
| 146 | md5_begin(&md5c);
|
---|
| 147 | md5_hash(&md5c, "\263\342\17\71\362\222\21\326\227\244\0\60\145\103\354\254", 16);
|
---|
| 148 | md5_hash(&md5c, hfs_id, hfs_id_len);
|
---|
| 149 | md5_end(&md5c, uuid);
|
---|
| 150 | uuid[6] = 0x30 | (uuid[6] & 0x0f);
|
---|
| 151 | uuid[8] = 0x80 | (uuid[8] & 0x3f);
|
---|
| 152 | volume_id_set_uuid(id, uuid, UUID_DCE);
|
---|
| 153 | }
|
---|
| 154 |
|
---|
[2725] | 155 | int FAST_FUNC volume_id_probe_hfs_hfsplus(struct volume_id *id /*,uint64_t off*/)
|
---|
| 156 | {
|
---|
| 157 | uint64_t off = 0;
|
---|
| 158 | unsigned blocksize;
|
---|
| 159 | unsigned cat_block;
|
---|
| 160 | unsigned ext_block_start;
|
---|
| 161 | unsigned ext_block_count;
|
---|
| 162 | int ext;
|
---|
| 163 | unsigned leaf_node_head;
|
---|
| 164 | unsigned leaf_node_count;
|
---|
| 165 | unsigned leaf_node_size;
|
---|
| 166 | unsigned leaf_block;
|
---|
| 167 | uint64_t leaf_off;
|
---|
| 168 | unsigned alloc_block_size;
|
---|
| 169 | unsigned alloc_first_block;
|
---|
| 170 | unsigned embed_first_block;
|
---|
| 171 | unsigned record_count;
|
---|
| 172 | struct hfsplus_vol_header *hfsplus;
|
---|
| 173 | struct hfsplus_bnode_descriptor *descr;
|
---|
| 174 | struct hfsplus_bheader_record *bnode;
|
---|
| 175 | struct hfsplus_catalog_key *key;
|
---|
| 176 | unsigned label_len;
|
---|
| 177 | struct hfsplus_extent extents[HFSPLUS_EXTENT_COUNT];
|
---|
| 178 | struct hfs_mdb *hfs;
|
---|
| 179 | const uint8_t *buf;
|
---|
| 180 |
|
---|
| 181 | dbg("probing at offset 0x%llx", (unsigned long long) off);
|
---|
| 182 |
|
---|
| 183 | buf = volume_id_get_buffer(id, off + HFS_SUPERBLOCK_OFFSET, 0x200);
|
---|
| 184 | if (buf == NULL)
|
---|
| 185 | return -1;
|
---|
| 186 |
|
---|
| 187 | hfs = (struct hfs_mdb *) buf;
|
---|
| 188 | if (hfs->signature[0] != 'B' || hfs->signature[1] != 'D')
|
---|
| 189 | goto checkplus;
|
---|
| 190 |
|
---|
| 191 | /* it may be just a hfs wrapper for hfs+ */
|
---|
| 192 | if (hfs->embed_sig[0] == 'H' && hfs->embed_sig[1] == '+') {
|
---|
| 193 | alloc_block_size = be32_to_cpu(hfs->al_blk_size);
|
---|
| 194 | dbg("alloc_block_size 0x%x", alloc_block_size);
|
---|
| 195 |
|
---|
| 196 | alloc_first_block = be16_to_cpu(hfs->al_bl_st);
|
---|
| 197 | dbg("alloc_first_block 0x%x", alloc_first_block);
|
---|
| 198 |
|
---|
| 199 | embed_first_block = be16_to_cpu(hfs->embed_startblock);
|
---|
| 200 | dbg("embed_first_block 0x%x", embed_first_block);
|
---|
| 201 |
|
---|
| 202 | off += (alloc_first_block * 512) +
|
---|
| 203 | (embed_first_block * alloc_block_size);
|
---|
| 204 | dbg("hfs wrapped hfs+ found at offset 0x%llx", (unsigned long long) off);
|
---|
| 205 |
|
---|
| 206 | buf = volume_id_get_buffer(id, off + HFS_SUPERBLOCK_OFFSET, 0x200);
|
---|
| 207 | if (buf == NULL)
|
---|
| 208 | return -1;
|
---|
| 209 | goto checkplus;
|
---|
| 210 | }
|
---|
| 211 |
|
---|
| 212 | if (hfs->label_len > 0 && hfs->label_len < 28) {
|
---|
| 213 | // volume_id_set_label_raw(id, hfs->label, hfs->label_len);
|
---|
| 214 | volume_id_set_label_string(id, hfs->label, hfs->label_len) ;
|
---|
| 215 | }
|
---|
| 216 |
|
---|
[3232] | 217 | hfs_set_uuid(id, hfs->finder_info.id);
|
---|
[2725] | 218 | // volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
|
---|
[3232] | 219 | IF_FEATURE_BLKID_TYPE(id->type = "hfs";)
|
---|
[2725] | 220 |
|
---|
| 221 | return 0;
|
---|
| 222 |
|
---|
| 223 | checkplus:
|
---|
| 224 | hfsplus = (struct hfsplus_vol_header *) buf;
|
---|
| 225 | if (hfs->signature[0] == 'H')
|
---|
| 226 | if (hfs->signature[1] == '+' || hfs->signature[1] == 'X')
|
---|
| 227 | goto hfsplus;
|
---|
| 228 | return -1;
|
---|
| 229 |
|
---|
| 230 | hfsplus:
|
---|
[3232] | 231 | hfs_set_uuid(id, hfsplus->finder_info.id);
|
---|
[2725] | 232 |
|
---|
| 233 | blocksize = be32_to_cpu(hfsplus->blocksize);
|
---|
| 234 | dbg("blocksize %u", blocksize);
|
---|
| 235 |
|
---|
| 236 | memcpy(extents, hfsplus->cat_file.extents, sizeof(extents));
|
---|
| 237 | cat_block = be32_to_cpu(extents[0].start_block);
|
---|
| 238 | dbg("catalog start block 0x%x", cat_block);
|
---|
| 239 |
|
---|
| 240 | buf = volume_id_get_buffer(id, off + (cat_block * blocksize), 0x2000);
|
---|
| 241 | if (buf == NULL)
|
---|
| 242 | goto found;
|
---|
| 243 |
|
---|
| 244 | bnode = (struct hfsplus_bheader_record *)
|
---|
| 245 | &buf[sizeof(struct hfsplus_bnode_descriptor)];
|
---|
| 246 |
|
---|
| 247 | leaf_node_head = be32_to_cpu(bnode->leaf_head);
|
---|
| 248 | dbg("catalog leaf node 0x%x", leaf_node_head);
|
---|
| 249 |
|
---|
| 250 | leaf_node_size = be16_to_cpu(bnode->node_size);
|
---|
| 251 | dbg("leaf node size 0x%x", leaf_node_size);
|
---|
| 252 |
|
---|
| 253 | leaf_node_count = be32_to_cpu(bnode->leaf_count);
|
---|
| 254 | dbg("leaf node count 0x%x", leaf_node_count);
|
---|
| 255 | if (leaf_node_count == 0)
|
---|
| 256 | goto found;
|
---|
| 257 |
|
---|
| 258 | leaf_block = (leaf_node_head * leaf_node_size) / blocksize;
|
---|
| 259 |
|
---|
| 260 | /* get physical location */
|
---|
| 261 | for (ext = 0; ext < HFSPLUS_EXTENT_COUNT; ext++) {
|
---|
| 262 | ext_block_start = be32_to_cpu(extents[ext].start_block);
|
---|
| 263 | ext_block_count = be32_to_cpu(extents[ext].block_count);
|
---|
| 264 | dbg("extent start block 0x%x, count 0x%x", ext_block_start, ext_block_count);
|
---|
| 265 |
|
---|
| 266 | if (ext_block_count == 0)
|
---|
| 267 | goto found;
|
---|
| 268 |
|
---|
| 269 | /* this is our extent */
|
---|
| 270 | if (leaf_block < ext_block_count)
|
---|
| 271 | break;
|
---|
| 272 |
|
---|
| 273 | leaf_block -= ext_block_count;
|
---|
| 274 | }
|
---|
| 275 | if (ext == HFSPLUS_EXTENT_COUNT)
|
---|
| 276 | goto found;
|
---|
| 277 | dbg("found block in extent %i", ext);
|
---|
| 278 |
|
---|
| 279 | leaf_off = (ext_block_start + leaf_block) * blocksize;
|
---|
| 280 |
|
---|
| 281 | buf = volume_id_get_buffer(id, off + leaf_off, leaf_node_size);
|
---|
| 282 | if (buf == NULL)
|
---|
| 283 | goto found;
|
---|
| 284 |
|
---|
| 285 | descr = (struct hfsplus_bnode_descriptor *) buf;
|
---|
| 286 | dbg("descriptor type 0x%x", descr->type);
|
---|
| 287 |
|
---|
| 288 | record_count = be16_to_cpu(descr->num_recs);
|
---|
| 289 | dbg("number of records %u", record_count);
|
---|
| 290 | if (record_count == 0)
|
---|
| 291 | goto found;
|
---|
| 292 |
|
---|
| 293 | if (descr->type != HFS_NODE_LEAF)
|
---|
| 294 | goto found;
|
---|
| 295 |
|
---|
| 296 | key = (struct hfsplus_catalog_key *)
|
---|
| 297 | &buf[sizeof(struct hfsplus_bnode_descriptor)];
|
---|
| 298 |
|
---|
| 299 | dbg("parent id 0x%x", be32_to_cpu(key->parent_id));
|
---|
| 300 | if (key->parent_id != cpu_to_be32(HFSPLUS_POR_CNID))
|
---|
| 301 | goto found;
|
---|
| 302 |
|
---|
| 303 | label_len = be16_to_cpu(key->unicode_len) * 2;
|
---|
| 304 | dbg("label unicode16 len %i", label_len);
|
---|
| 305 | // volume_id_set_label_raw(id, key->unicode, label_len);
|
---|
| 306 | volume_id_set_label_unicode16(id, key->unicode, BE, label_len);
|
---|
| 307 |
|
---|
| 308 | found:
|
---|
| 309 | // volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
|
---|
[3232] | 310 | IF_FEATURE_BLKID_TYPE(id->type = "hfsplus";)
|
---|
[2725] | 311 |
|
---|
| 312 | return 0;
|
---|
| 313 | }
|
---|