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
21 //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_MINIX) += minix.o
22
23 //config:
24 //config:### config FEATURE_VOLUMEID_MINIX
25 //config:### bool "minix filesystem"
26 //config:### default y
27 //config:### depends on VOLUMEID
28 //config:### help
29 //config:### TODO
30 //config:
31
32 #include "volume_id_internal.h"
33
34 struct minix_super_block {
35 uint16_t s_ninodes;
36 uint16_t s_nzones;
37 uint16_t s_imap_blocks;
38 uint16_t s_zmap_blocks;
39 uint16_t s_firstdatazone;
40 uint16_t s_log_zone_size;
41 uint32_t s_max_size;
42 uint16_t s_magic;
43 uint16_t s_state;
44 uint32_t s_zones;
45 } PACKED;
46
47 #define MINIX_SUPERBLOCK_OFFSET 0x400
48
volume_id_probe_minix(struct volume_id * id,uint64_t off)49 int FAST_FUNC volume_id_probe_minix(struct volume_id *id, uint64_t off)
50 {
51 struct minix_super_block *ms;
52
53 dbg("probing at offset 0x%llx", (unsigned long long) off);
54
55 ms = volume_id_get_buffer(id, off + MINIX_SUPERBLOCK_OFFSET, 0x200);
56 if (ms == NULL)
57 return -1;
58
59 if (ms->s_magic == cpu_to_le16(0x137f)) {
60 // id->type_version[0] = '1';
61 goto found;
62 }
63
64 if (ms->s_magic == cpu_to_le16(0x1387)) {
65 // id->type_version[0] = '1';
66 goto found;
67 }
68
69 if (ms->s_magic == cpu_to_le16(0x2468)) {
70 // id->type_version[0] = '2';
71 goto found;
72 }
73
74 if (ms->s_magic == cpu_to_le16(0x2478)) {
75 // id->type_version[0] = '2';
76 goto found;
77 }
78
79 return -1;
80
81 found:
82 // id->type_version[1] = '\0';
83 // volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
84 // id->type = "minix";
85 return 0;
86 }
87