1 /*
2 * volume_id - reads filesystem label and uuid
3 *
4 * Copyright (C) 2005 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 //config:### config FEATURE_VOLUMEID_HPFS
21 //config:### bool "hpfs filesystem"
22 //config:### default y
23 //config:### depends on VOLUMEID
24
25 //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_HPFS) += hpfs.o
26
27 #include "volume_id_internal.h"
28
29 struct hpfs_super {
30 uint8_t magic[4];
31 uint8_t version;
32 } PACKED;
33
34 #define HPFS_SUPERBLOCK_OFFSET 0x2000
35
volume_id_probe_hpfs(struct volume_id * id,uint64_t off)36 int FAST_FUNC volume_id_probe_hpfs(struct volume_id *id, uint64_t off)
37 {
38 struct hpfs_super *hs;
39
40 dbg("probing at offset 0x%llx", (unsigned long long) off);
41
42 hs = volume_id_get_buffer(id, off + HPFS_SUPERBLOCK_OFFSET, 0x200);
43 if (hs == NULL)
44 return -1;
45
46 if (memcmp(hs->magic, "\x49\xe8\x95\xf9", 4) == 0) {
47 // sprintf(id->type_version, "%u", hs->version);
48 // volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
49 // id->type = "hpfs";
50 return 0;
51 }
52
53 return -1;
54 }
55