chiark / gitweb /
Merge branch 'master' from gregkh@master.kernel.org:/pub/scm/linux/hotplug/udev
[elogind.git] / extras / volume_id / volume_id / silicon_raid.c
1 /*
2  * volume_id - reads filesystem label and uuid
3  *
4  * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
5  *
6  *      This program is free software; you can redistribute it and/or modify it
7  *      under the terms of the GNU General Public License as published by the
8  *      Free Software Foundation version 2 of the License.
9  */
10
11 #ifndef _GNU_SOURCE
12 #define _GNU_SOURCE 1
13 #endif
14
15 #ifdef HAVE_CONFIG_H
16 #  include <config.h>
17 #endif
18
19 #include <stdio.h>
20 #include <stdlib.h>
21 #include <unistd.h>
22 #include <string.h>
23 #include <errno.h>
24 #include <ctype.h>
25
26 #include "volume_id.h"
27 #include "logging.h"
28 #include "util.h"
29 #include "silicon_raid.h"
30
31 struct silicon_meta {
32         uint8_t         unknown0[0x2E];
33         uint8_t         ascii_version[0x36 - 0x2E];
34         uint8_t         diskname[0x56 - 0x36];
35         uint8_t         unknown1[0x60 - 0x56];
36         uint32_t        magic;
37         uint32_t        unknown1a[0x6C - 0x64];
38         uint32_t        array_sectors_low;
39         uint32_t        array_sectors_high;
40         uint8_t         unknown2[0x78 - 0x74];
41         uint32_t        thisdisk_sectors;
42         uint8_t         unknown3[0x100 - 0x7C];
43         uint8_t         unknown4[0x104 - 0x100];
44         uint16_t        product_id;
45         uint16_t        vendor_id;
46         uint16_t        minor_ver;
47         uint16_t        major_ver;
48 } __attribute__((packed));
49
50 #define SILICON_MAGIC           0x2F000000
51
52 int volume_id_probe_silicon_medley_raid(struct volume_id *id, uint64_t off, uint64_t size)
53 {
54         const uint8_t *buf;
55         uint64_t meta_off;
56         struct silicon_meta *sil;
57
58         dbg("probing at offset 0x%llx, size 0x%llx",
59             (unsigned long long) off, (unsigned long long) size);
60
61         if (size < 0x10000)
62                 return -1;
63
64         meta_off = ((size / 0x200)-1) * 0x200;
65         buf = volume_id_get_buffer(id, off + meta_off, 0x200);
66         if (buf == NULL)
67                 return -1;
68
69         sil = (struct silicon_meta *) buf;
70         if (le32_to_cpu(sil->magic) != SILICON_MAGIC)
71                 return -1;
72
73         volume_id_set_usage(id, VOLUME_ID_RAID);
74         snprintf(id->type_version, sizeof(id->type_version)-1, "%u.%u",
75                  le16_to_cpu(sil->major_ver), le16_to_cpu(sil->minor_ver));
76         id->type = "silicon_medley_raid_member";
77
78         return 0;
79 }