diff options
Diffstat (limited to 'util-linux/volume_id/minix.c')
-rw-r--r-- | util-linux/volume_id/minix.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/util-linux/volume_id/minix.c b/util-linux/volume_id/minix.c new file mode 100644 index 000000000..ede23cb24 --- /dev/null +++ b/util-linux/volume_id/minix.c | |||
@@ -0,0 +1,76 @@ | |||
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 | #include "volume_id_internal.h" | ||
22 | |||
23 | struct minix_super_block | ||
24 | { | ||
25 | uint16_t s_ninodes; | ||
26 | uint16_t s_nzones; | ||
27 | uint16_t s_imap_blocks; | ||
28 | uint16_t s_zmap_blocks; | ||
29 | uint16_t s_firstdatazone; | ||
30 | uint16_t s_log_zone_size; | ||
31 | uint32_t s_max_size; | ||
32 | uint16_t s_magic; | ||
33 | uint16_t s_state; | ||
34 | uint32_t s_zones; | ||
35 | } __attribute__((__packed__)); | ||
36 | |||
37 | #define MINIX_SUPERBLOCK_OFFSET 0x400 | ||
38 | |||
39 | int volume_id_probe_minix(struct volume_id *id, uint64_t off) | ||
40 | { | ||
41 | struct minix_super_block *ms; | ||
42 | |||
43 | dbg("probing at offset 0x%llx", (unsigned long long) off); | ||
44 | |||
45 | ms = volume_id_get_buffer(id, off + MINIX_SUPERBLOCK_OFFSET, 0x200); | ||
46 | if (ms == NULL) | ||
47 | return -1; | ||
48 | |||
49 | if (le16_to_cpu(ms->s_magic) == 0x137f) { | ||
50 | id->type_version[0] = '1'; | ||
51 | goto found; | ||
52 | } | ||
53 | |||
54 | if (le16_to_cpu(ms->s_magic) == 0x1387) { | ||
55 | id->type_version[0] = '1'; | ||
56 | goto found; | ||
57 | } | ||
58 | |||
59 | if (le16_to_cpu(ms->s_magic) == 0x2468) { | ||
60 | id->type_version[0] = '2'; | ||
61 | goto found; | ||
62 | } | ||
63 | |||
64 | if (le16_to_cpu(ms->s_magic) == 0x2478) { | ||
65 | id->type_version[0] = '2'; | ||
66 | goto found; | ||
67 | } | ||
68 | |||
69 | return -1; | ||
70 | |||
71 | found: | ||
72 | id->type_version[1] = '\0'; | ||
73 | volume_id_set_usage(id, VOLUME_ID_FILESYSTEM); | ||
74 | id->type = "minix"; | ||
75 | return 0; | ||
76 | } | ||